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Thomas Gleixner1802d0b2019-05-27 08:55:21 +02001// SPDX-License-Identifier: GPL-2.0-only
Tao Maf56654c2008-08-18 17:38:48 +08002/* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * xattr.c
6 *
Tiger Yangc3cb6822008-10-23 16:33:03 +08007 * Copyright (C) 2004, 2008 Oracle. All rights reserved.
Tao Maf56654c2008-08-18 17:38:48 +08008 *
Tiger Yangcf1d6c72008-08-18 17:11:00 +08009 * CREDITS:
Tiger Yangc3cb6822008-10-23 16:33:03 +080010 * Lots of code in this file is copy from linux/fs/ext3/xattr.c.
11 * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
Tao Maf56654c2008-08-18 17:38:48 +080012 */
13
Tiger Yangcf1d6c72008-08-18 17:11:00 +080014#include <linux/capability.h>
15#include <linux/fs.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/highmem.h>
19#include <linux/pagemap.h>
20#include <linux/uio.h>
21#include <linux/sched.h>
22#include <linux/splice.h>
23#include <linux/mount.h>
24#include <linux/writeback.h>
25#include <linux/falloc.h>
Tao Ma01225592008-08-18 17:38:53 +080026#include <linux/sort.h>
Mark Fasheh99219ae2008-10-07 14:52:59 -070027#include <linux/init.h>
28#include <linux/module.h>
29#include <linux/string.h>
Tiger Yang923f7f32008-11-14 11:16:27 +080030#include <linux/security.h>
Tiger Yangcf1d6c72008-08-18 17:11:00 +080031
Tao Maf56654c2008-08-18 17:38:48 +080032#include <cluster/masklog.h>
33
34#include "ocfs2.h"
35#include "alloc.h"
Joel Beckerd6b32bb2008-10-17 14:55:01 -070036#include "blockcheck.h"
Tao Maf56654c2008-08-18 17:38:48 +080037#include "dlmglue.h"
38#include "file.h"
Tiger Yangcf1d6c72008-08-18 17:11:00 +080039#include "symlink.h"
40#include "sysfile.h"
Tao Maf56654c2008-08-18 17:38:48 +080041#include "inode.h"
42#include "journal.h"
43#include "ocfs2_fs.h"
44#include "suballoc.h"
45#include "uptodate.h"
46#include "buffer_head_io.h"
Tao Ma0c044f02008-08-18 17:38:50 +080047#include "super.h"
Tiger Yangcf1d6c72008-08-18 17:11:00 +080048#include "xattr.h"
Tao Ma492a8a32009-08-18 11:43:17 +080049#include "refcounttree.h"
Tao Ma0fe9b662009-08-18 11:47:56 +080050#include "acl.h"
Tao Ma402b4182011-02-23 22:01:17 +080051#include "ocfs2_trace.h"
Tiger Yangcf1d6c72008-08-18 17:11:00 +080052
53struct ocfs2_xattr_def_value_root {
54 struct ocfs2_xattr_value_root xv;
55 struct ocfs2_extent_rec er;
56};
57
Tao Ma0c044f02008-08-18 17:38:50 +080058struct ocfs2_xattr_bucket {
Joel Beckerba937122008-10-24 19:13:20 -070059 /* The inode these xattrs are associated with */
60 struct inode *bu_inode;
61
62 /* The actual buffers that make up the bucket */
Joel Becker4ac60322008-10-18 19:11:42 -070063 struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET];
Joel Beckerba937122008-10-24 19:13:20 -070064
65 /* How many blocks make up one bucket for this filesystem */
66 int bu_blocks;
Tao Ma0c044f02008-08-18 17:38:50 +080067};
68
Tao Ma78f30c32008-11-12 08:27:00 +080069struct ocfs2_xattr_set_ctxt {
Tao Ma85db90e2008-11-12 08:27:01 +080070 handle_t *handle;
Tao Ma78f30c32008-11-12 08:27:00 +080071 struct ocfs2_alloc_context *meta_ac;
72 struct ocfs2_alloc_context *data_ac;
73 struct ocfs2_cached_dealloc_ctxt dealloc;
Tao Ma5f5261a2010-05-13 22:49:05 +080074 int set_abort;
Tao Ma78f30c32008-11-12 08:27:00 +080075};
76
Tiger Yangcf1d6c72008-08-18 17:11:00 +080077#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
78#define OCFS2_XATTR_INLINE_SIZE 80
Tiger Yang4442f512009-02-20 11:11:50 +080079#define OCFS2_XATTR_HEADER_GAP 4
Tiger Yang534eadd2008-11-14 11:16:41 +080080#define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \
81 - sizeof(struct ocfs2_xattr_header) \
Tiger Yang4442f512009-02-20 11:11:50 +080082 - OCFS2_XATTR_HEADER_GAP)
Tiger Yang89c38bd2008-11-14 11:17:41 +080083#define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \
84 - sizeof(struct ocfs2_xattr_block) \
85 - sizeof(struct ocfs2_xattr_header) \
Tiger Yang4442f512009-02-20 11:11:50 +080086 - OCFS2_XATTR_HEADER_GAP)
Tiger Yangcf1d6c72008-08-18 17:11:00 +080087
88static struct ocfs2_xattr_def_value_root def_xv = {
89 .xv.xr_list.l_count = cpu_to_le16(1),
90};
91
Stephen Hemminger537d81c2010-05-13 17:53:22 -070092const struct xattr_handler *ocfs2_xattr_handlers[] = {
Tiger Yangcf1d6c72008-08-18 17:11:00 +080093 &ocfs2_xattr_user_handler,
Christoph Hellwig702e5bc2013-12-20 05:16:48 -080094 &posix_acl_access_xattr_handler,
95 &posix_acl_default_xattr_handler,
Tiger Yangcf1d6c72008-08-18 17:11:00 +080096 &ocfs2_xattr_trusted_handler,
Tiger Yang923f7f32008-11-14 11:16:27 +080097 &ocfs2_xattr_security_handler,
Tiger Yangcf1d6c72008-08-18 17:11:00 +080098 NULL
99};
100
Stephen Hemminger537d81c2010-05-13 17:53:22 -0700101static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800102 [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
Tiger Yang929fb012008-11-14 11:17:04 +0800103 [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
Christoph Hellwig702e5bc2013-12-20 05:16:48 -0800104 = &posix_acl_access_xattr_handler,
Tiger Yang929fb012008-11-14 11:17:04 +0800105 [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
Christoph Hellwig702e5bc2013-12-20 05:16:48 -0800106 = &posix_acl_default_xattr_handler,
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800107 [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
Tiger Yang923f7f32008-11-14 11:16:27 +0800108 [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800109};
110
111struct ocfs2_xattr_info {
Joel Becker6b240ff2009-08-14 18:02:52 -0700112 int xi_name_index;
113 const char *xi_name;
Joel Becker18853b92009-08-14 18:17:07 -0700114 int xi_name_len;
Joel Becker6b240ff2009-08-14 18:02:52 -0700115 const void *xi_value;
116 size_t xi_value_len;
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800117};
118
119struct ocfs2_xattr_search {
120 struct buffer_head *inode_bh;
121 /*
122 * xattr_bh point to the block buffer head which has extended attribute
123 * when extended attribute in inode, xattr_bh is equal to inode_bh.
124 */
125 struct buffer_head *xattr_bh;
126 struct ocfs2_xattr_header *header;
Joel Beckerba937122008-10-24 19:13:20 -0700127 struct ocfs2_xattr_bucket *bucket;
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800128 void *base;
129 void *end;
130 struct ocfs2_xattr_entry *here;
131 int not_found;
132};
133
Joel Becker11179f22009-08-14 16:07:44 -0700134/* Operations on struct ocfs2_xa_entry */
135struct ocfs2_xa_loc;
136struct ocfs2_xa_loc_operations {
137 /*
Joel Beckercf2bc802009-08-18 13:52:38 -0700138 * Journal functions
139 */
140 int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc,
141 int type);
142 void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc);
143
144 /*
Joel Becker11179f22009-08-14 16:07:44 -0700145 * Return a pointer to the appropriate buffer in loc->xl_storage
146 * at the given offset from loc->xl_header.
147 */
148 void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset);
149
Joel Becker69a3e532009-08-17 12:24:39 -0700150 /* Can we reuse the existing entry for the new value? */
151 int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc,
152 struct ocfs2_xattr_info *xi);
153
154 /* How much space is needed for the new value? */
155 int (*xlo_check_space)(struct ocfs2_xa_loc *loc,
156 struct ocfs2_xattr_info *xi);
157
158 /*
159 * Return the offset of the first name+value pair. This is
160 * the start of our downward-filling free space.
161 */
162 int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc);
163
Joel Becker11179f22009-08-14 16:07:44 -0700164 /*
165 * Remove the name+value at this location. Do whatever is
166 * appropriate with the remaining name+value pairs.
167 */
168 void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc);
Joel Becker69a3e532009-08-17 12:24:39 -0700169
170 /* Fill xl_entry with a new entry */
171 void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash);
172
173 /* Add name+value storage to an entry */
174 void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size);
Joel Becker3fc12af2009-08-18 13:20:27 -0700175
176 /*
177 * Initialize the value buf's access and bh fields for this entry.
178 * ocfs2_xa_fill_value_buf() will handle the xv pointer.
179 */
180 void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc,
181 struct ocfs2_xattr_value_buf *vb);
Joel Becker11179f22009-08-14 16:07:44 -0700182};
183
184/*
185 * Describes an xattr entry location. This is a memory structure
186 * tracking the on-disk structure.
187 */
188struct ocfs2_xa_loc {
Joel Beckercf2bc802009-08-18 13:52:38 -0700189 /* This xattr belongs to this inode */
190 struct inode *xl_inode;
191
Joel Becker11179f22009-08-14 16:07:44 -0700192 /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */
193 struct ocfs2_xattr_header *xl_header;
194
195 /* Bytes from xl_header to the end of the storage */
196 int xl_size;
197
198 /*
199 * The ocfs2_xattr_entry this location describes. If this is
200 * NULL, this location describes the on-disk structure where it
201 * would have been.
202 */
203 struct ocfs2_xattr_entry *xl_entry;
204
205 /*
206 * Internal housekeeping
207 */
208
209 /* Buffer(s) containing this entry */
210 void *xl_storage;
211
212 /* Operations on the storage backing this location */
213 const struct ocfs2_xa_loc_operations *xl_ops;
214};
215
Joel Becker199799a2009-08-14 19:04:15 -0700216/*
217 * Convenience functions to calculate how much space is needed for a
218 * given name+value pair
219 */
220static int namevalue_size(int name_len, uint64_t value_len)
221{
222 if (value_len > OCFS2_XATTR_INLINE_SIZE)
223 return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
224 else
225 return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
226}
227
228static int namevalue_size_xi(struct ocfs2_xattr_info *xi)
229{
230 return namevalue_size(xi->xi_name_len, xi->xi_value_len);
231}
232
233static int namevalue_size_xe(struct ocfs2_xattr_entry *xe)
234{
235 u64 value_len = le64_to_cpu(xe->xe_value_size);
236
237 BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) &&
238 ocfs2_xattr_is_local(xe));
239 return namevalue_size(xe->xe_name_len, value_len);
240}
241
242
Tao Mafd68a892009-08-18 11:43:21 +0800243static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb,
Tao Ma589dc262008-08-18 17:38:51 +0800244 struct ocfs2_xattr_header *xh,
245 int index,
246 int *block_off,
247 int *new_offset);
248
Joel Becker54f443f2008-10-20 18:43:07 -0700249static int ocfs2_xattr_block_find(struct inode *inode,
250 int name_index,
251 const char *name,
252 struct ocfs2_xattr_search *xs);
Tao Ma589dc262008-08-18 17:38:51 +0800253static int ocfs2_xattr_index_block_find(struct inode *inode,
254 struct buffer_head *root_bh,
255 int name_index,
256 const char *name,
257 struct ocfs2_xattr_search *xs);
258
Tao Ma0c044f02008-08-18 17:38:50 +0800259static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
Tao Ma47bca492009-08-18 11:43:42 +0800260 struct buffer_head *blk_bh,
Tao Ma0c044f02008-08-18 17:38:50 +0800261 char *buffer,
262 size_t buffer_size);
263
Tao Ma01225592008-08-18 17:38:53 +0800264static int ocfs2_xattr_create_index_block(struct inode *inode,
Tao Ma78f30c32008-11-12 08:27:00 +0800265 struct ocfs2_xattr_search *xs,
266 struct ocfs2_xattr_set_ctxt *ctxt);
Tao Ma01225592008-08-18 17:38:53 +0800267
268static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
269 struct ocfs2_xattr_info *xi,
Tao Ma78f30c32008-11-12 08:27:00 +0800270 struct ocfs2_xattr_search *xs,
271 struct ocfs2_xattr_set_ctxt *ctxt);
Tao Ma01225592008-08-18 17:38:53 +0800272
Tao Ma47bca492009-08-18 11:43:42 +0800273typedef int (xattr_tree_rec_func)(struct inode *inode,
274 struct buffer_head *root_bh,
275 u64 blkno, u32 cpos, u32 len, void *para);
276static int ocfs2_iterate_xattr_index_block(struct inode *inode,
277 struct buffer_head *root_bh,
278 xattr_tree_rec_func *rec_func,
279 void *para);
280static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
281 struct ocfs2_xattr_bucket *bucket,
282 void *para);
283static int ocfs2_rm_xattr_cluster(struct inode *inode,
284 struct buffer_head *root_bh,
285 u64 blkno,
286 u32 cpos,
287 u32 len,
288 void *para);
289
Joel Beckerc58b6032008-11-26 13:36:24 -0800290static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
291 u64 src_blk, u64 last_blk, u64 to_blk,
292 unsigned int start_bucket,
293 u32 *first_hash);
Tao Ma492a8a32009-08-18 11:43:17 +0800294static int ocfs2_prepare_refcount_xattr(struct inode *inode,
295 struct ocfs2_dinode *di,
296 struct ocfs2_xattr_info *xi,
297 struct ocfs2_xattr_search *xis,
298 struct ocfs2_xattr_search *xbs,
299 struct ocfs2_refcount_tree **ref_tree,
300 int *meta_need,
301 int *credits);
Tao Mace9c5a52009-08-18 11:43:59 +0800302static int ocfs2_get_xattr_tree_value_root(struct super_block *sb,
303 struct ocfs2_xattr_bucket *bucket,
304 int offset,
305 struct ocfs2_xattr_value_root **xv,
306 struct buffer_head **bh);
Tao Maa3944252008-08-18 17:38:54 +0800307
Tiger Yang0030e002008-10-23 16:33:33 +0800308static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
309{
310 return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
311}
312
313static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
314{
315 return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
316}
317
Joel Becker9c7759a2008-10-24 16:21:03 -0700318#define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
Joel Becker51def392008-10-24 16:57:21 -0700319#define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
Joel Becker3e632942008-10-24 17:04:49 -0700320#define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
Joel Becker9c7759a2008-10-24 16:21:03 -0700321
Joel Beckerba937122008-10-24 19:13:20 -0700322static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode)
Joel Becker6dde41d2008-10-24 17:16:48 -0700323{
Joel Beckerba937122008-10-24 19:13:20 -0700324 struct ocfs2_xattr_bucket *bucket;
325 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
Joel Becker6dde41d2008-10-24 17:16:48 -0700326
Joel Beckerba937122008-10-24 19:13:20 -0700327 BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET);
328
329 bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS);
330 if (bucket) {
331 bucket->bu_inode = inode;
332 bucket->bu_blocks = blks;
333 }
334
335 return bucket;
336}
337
338static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket)
339{
340 int i;
341
342 for (i = 0; i < bucket->bu_blocks; i++) {
Joel Becker6dde41d2008-10-24 17:16:48 -0700343 brelse(bucket->bu_bhs[i]);
344 bucket->bu_bhs[i] = NULL;
345 }
346}
347
Joel Beckerba937122008-10-24 19:13:20 -0700348static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket)
349{
350 if (bucket) {
351 ocfs2_xattr_bucket_relse(bucket);
352 bucket->bu_inode = NULL;
353 kfree(bucket);
354 }
355}
356
Joel Becker784b8162008-10-24 17:33:40 -0700357/*
358 * A bucket that has never been written to disk doesn't need to be
359 * read. We just need the buffer_heads. Don't call this for
360 * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes
361 * them fully.
362 */
Joel Beckerba937122008-10-24 19:13:20 -0700363static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
Wengang Wang9c339252014-04-03 14:47:15 -0700364 u64 xb_blkno, int new)
Joel Becker784b8162008-10-24 17:33:40 -0700365{
366 int i, rc = 0;
Joel Becker784b8162008-10-24 17:33:40 -0700367
Joel Beckerba937122008-10-24 19:13:20 -0700368 for (i = 0; i < bucket->bu_blocks; i++) {
369 bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb,
370 xb_blkno + i);
Joel Becker784b8162008-10-24 17:33:40 -0700371 if (!bucket->bu_bhs[i]) {
Rui Xiang7391a292013-11-12 15:06:54 -0800372 rc = -ENOMEM;
Joel Becker784b8162008-10-24 17:33:40 -0700373 mlog_errno(rc);
374 break;
375 }
376
Joel Becker8cb471e2009-02-10 20:00:41 -0800377 if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
Wengang Wang9c339252014-04-03 14:47:15 -0700378 bucket->bu_bhs[i])) {
379 if (new)
380 ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
381 bucket->bu_bhs[i]);
382 else {
383 set_buffer_uptodate(bucket->bu_bhs[i]);
384 ocfs2_set_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
385 bucket->bu_bhs[i]);
386 }
387 }
Joel Becker784b8162008-10-24 17:33:40 -0700388 }
389
390 if (rc)
Joel Beckerba937122008-10-24 19:13:20 -0700391 ocfs2_xattr_bucket_relse(bucket);
Joel Becker784b8162008-10-24 17:33:40 -0700392 return rc;
393}
394
395/* Read the xattr bucket at xb_blkno */
Joel Beckerba937122008-10-24 19:13:20 -0700396static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
Joel Becker784b8162008-10-24 17:33:40 -0700397 u64 xb_blkno)
398{
Joel Beckerba937122008-10-24 19:13:20 -0700399 int rc;
Joel Becker784b8162008-10-24 17:33:40 -0700400
Joel Becker8cb471e2009-02-10 20:00:41 -0800401 rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno,
Joel Becker970e4932008-11-13 14:49:19 -0800402 bucket->bu_blocks, bucket->bu_bhs, 0,
403 NULL);
Joel Becker4d0e2142008-12-05 11:19:37 -0800404 if (!rc) {
Tao Mac8b9cf92009-02-24 17:40:26 -0800405 spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
Joel Becker4d0e2142008-12-05 11:19:37 -0800406 rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb,
407 bucket->bu_bhs,
408 bucket->bu_blocks,
409 &bucket_xh(bucket)->xh_check);
Tao Mac8b9cf92009-02-24 17:40:26 -0800410 spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
Joel Becker4d0e2142008-12-05 11:19:37 -0800411 if (rc)
412 mlog_errno(rc);
413 }
414
Joel Becker784b8162008-10-24 17:33:40 -0700415 if (rc)
Joel Beckerba937122008-10-24 19:13:20 -0700416 ocfs2_xattr_bucket_relse(bucket);
Joel Becker784b8162008-10-24 17:33:40 -0700417 return rc;
418}
419
Joel Becker1224be02008-10-24 18:47:33 -0700420static int ocfs2_xattr_bucket_journal_access(handle_t *handle,
Joel Becker1224be02008-10-24 18:47:33 -0700421 struct ocfs2_xattr_bucket *bucket,
422 int type)
423{
424 int i, rc = 0;
Joel Becker1224be02008-10-24 18:47:33 -0700425
Joel Beckerba937122008-10-24 19:13:20 -0700426 for (i = 0; i < bucket->bu_blocks; i++) {
Joel Becker0cf2f762009-02-12 16:41:25 -0800427 rc = ocfs2_journal_access(handle,
428 INODE_CACHE(bucket->bu_inode),
Joel Becker1224be02008-10-24 18:47:33 -0700429 bucket->bu_bhs[i], type);
430 if (rc) {
431 mlog_errno(rc);
432 break;
433 }
434 }
435
436 return rc;
437}
438
439static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle,
Joel Becker1224be02008-10-24 18:47:33 -0700440 struct ocfs2_xattr_bucket *bucket)
441{
Joel Beckerba937122008-10-24 19:13:20 -0700442 int i;
Joel Becker1224be02008-10-24 18:47:33 -0700443
Tao Mac8b9cf92009-02-24 17:40:26 -0800444 spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
Joel Becker4d0e2142008-12-05 11:19:37 -0800445 ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb,
446 bucket->bu_bhs, bucket->bu_blocks,
447 &bucket_xh(bucket)->xh_check);
Tao Mac8b9cf92009-02-24 17:40:26 -0800448 spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
Joel Becker4d0e2142008-12-05 11:19:37 -0800449
Joel Beckerba937122008-10-24 19:13:20 -0700450 for (i = 0; i < bucket->bu_blocks; i++)
Joel Becker1224be02008-10-24 18:47:33 -0700451 ocfs2_journal_dirty(handle, bucket->bu_bhs[i]);
452}
453
Joel Beckerba937122008-10-24 19:13:20 -0700454static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest,
Joel Becker4980c6d2008-10-24 18:54:43 -0700455 struct ocfs2_xattr_bucket *src)
456{
457 int i;
Joel Beckerba937122008-10-24 19:13:20 -0700458 int blocksize = src->bu_inode->i_sb->s_blocksize;
Joel Becker4980c6d2008-10-24 18:54:43 -0700459
Joel Beckerba937122008-10-24 19:13:20 -0700460 BUG_ON(dest->bu_blocks != src->bu_blocks);
461 BUG_ON(dest->bu_inode != src->bu_inode);
462
463 for (i = 0; i < src->bu_blocks; i++) {
Joel Becker4980c6d2008-10-24 18:54:43 -0700464 memcpy(bucket_block(dest, i), bucket_block(src, i),
465 blocksize);
466 }
467}
Joel Becker1224be02008-10-24 18:47:33 -0700468
Joel Becker4ae1d692008-11-13 14:49:18 -0800469static int ocfs2_validate_xattr_block(struct super_block *sb,
470 struct buffer_head *bh)
471{
Joel Beckerd6b32bb2008-10-17 14:55:01 -0700472 int rc;
Joel Becker4ae1d692008-11-13 14:49:18 -0800473 struct ocfs2_xattr_block *xb =
474 (struct ocfs2_xattr_block *)bh->b_data;
475
Tao Ma402b4182011-02-23 22:01:17 +0800476 trace_ocfs2_validate_xattr_block((unsigned long long)bh->b_blocknr);
Joel Becker4ae1d692008-11-13 14:49:18 -0800477
Joel Beckerd6b32bb2008-10-17 14:55:01 -0700478 BUG_ON(!buffer_uptodate(bh));
479
480 /*
481 * If the ecc fails, we return the error but otherwise
482 * leave the filesystem running. We know any error is
483 * local to this block.
484 */
485 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check);
486 if (rc)
487 return rc;
488
489 /*
490 * Errors after here are fatal
491 */
492
Joel Becker4ae1d692008-11-13 14:49:18 -0800493 if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
Goldwyn Rodrigues17a5b9a2015-09-04 15:44:17 -0700494 return ocfs2_error(sb,
Joe Perches7ecef142015-09-04 15:44:51 -0700495 "Extended attribute block #%llu has bad signature %.*s\n",
496 (unsigned long long)bh->b_blocknr, 7,
497 xb->xb_signature);
Joel Becker4ae1d692008-11-13 14:49:18 -0800498 }
499
500 if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) {
Goldwyn Rodrigues17a5b9a2015-09-04 15:44:17 -0700501 return ocfs2_error(sb,
Joe Perches7ecef142015-09-04 15:44:51 -0700502 "Extended attribute block #%llu has an invalid xb_blkno of %llu\n",
503 (unsigned long long)bh->b_blocknr,
504 (unsigned long long)le64_to_cpu(xb->xb_blkno));
Joel Becker4ae1d692008-11-13 14:49:18 -0800505 }
506
507 if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) {
Goldwyn Rodrigues17a5b9a2015-09-04 15:44:17 -0700508 return ocfs2_error(sb,
Joe Perches7ecef142015-09-04 15:44:51 -0700509 "Extended attribute block #%llu has an invalid xb_fs_generation of #%u\n",
510 (unsigned long long)bh->b_blocknr,
511 le32_to_cpu(xb->xb_fs_generation));
Joel Becker4ae1d692008-11-13 14:49:18 -0800512 }
513
514 return 0;
515}
516
517static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno,
518 struct buffer_head **bh)
519{
520 int rc;
521 struct buffer_head *tmp = *bh;
522
Joel Becker8cb471e2009-02-10 20:00:41 -0800523 rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp,
Joel Becker970e4932008-11-13 14:49:19 -0800524 ocfs2_validate_xattr_block);
Joel Becker4ae1d692008-11-13 14:49:18 -0800525
526 /* If ocfs2_read_block() got us a new bh, pass it up. */
527 if (!rc && !*bh)
528 *bh = tmp;
529
530 return rc;
531}
532
Tao Ma936b8832008-10-09 23:06:14 +0800533static inline const char *ocfs2_xattr_prefix(int name_index)
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800534{
Stephen Hemminger537d81c2010-05-13 17:53:22 -0700535 const struct xattr_handler *handler = NULL;
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800536
537 if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
538 handler = ocfs2_xattr_handler_map[name_index];
Andreas Gruenbacher98e9cb52015-12-02 14:44:36 +0100539 return handler ? xattr_prefix(handler) : NULL;
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800540}
541
Mark Fasheh40daa162008-10-07 14:31:42 -0700542static u32 ocfs2_xattr_name_hash(struct inode *inode,
Tao Ma2057e5c2008-10-09 23:06:13 +0800543 const char *name,
Mark Fasheh40daa162008-10-07 14:31:42 -0700544 int name_len)
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800545{
546 /* Get hash value of uuid from super block */
547 u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
548 int i;
549
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800550 /* hash extended attribute name */
551 for (i = 0; i < name_len; i++) {
552 hash = (hash << OCFS2_HASH_SHIFT) ^
553 (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
554 *name++;
555 }
556
557 return hash;
558}
559
Tiger Yang534eadd2008-11-14 11:16:41 +0800560static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
561{
Joel Becker199799a2009-08-14 19:04:15 -0700562 return namevalue_size(name_len, value_len) +
563 sizeof(struct ocfs2_xattr_entry);
564}
Tiger Yang534eadd2008-11-14 11:16:41 +0800565
Joel Becker199799a2009-08-14 19:04:15 -0700566static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi)
567{
568 return namevalue_size_xi(xi) +
569 sizeof(struct ocfs2_xattr_entry);
570}
Tiger Yang534eadd2008-11-14 11:16:41 +0800571
Joel Becker199799a2009-08-14 19:04:15 -0700572static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe)
573{
574 return namevalue_size_xe(xe) +
575 sizeof(struct ocfs2_xattr_entry);
Tiger Yang534eadd2008-11-14 11:16:41 +0800576}
577
578int ocfs2_calc_security_init(struct inode *dir,
579 struct ocfs2_security_xattr_info *si,
580 int *want_clusters,
581 int *xattr_credits,
582 struct ocfs2_alloc_context **xattr_ac)
583{
584 int ret = 0;
585 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
586 int s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
587 si->value_len);
588
589 /*
590 * The max space of security xattr taken inline is
591 * 256(name) + 80(value) + 16(entry) = 352 bytes,
592 * So reserve one metadata block for it is ok.
593 */
594 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
595 s_size > OCFS2_XATTR_FREE_IN_IBODY) {
596 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
597 if (ret) {
598 mlog_errno(ret);
599 return ret;
600 }
601 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
602 }
603
604 /* reserve clusters for xattr value which will be set in B tree*/
Tiger Yang0e445b62008-12-09 16:42:51 +0800605 if (si->value_len > OCFS2_XATTR_INLINE_SIZE) {
606 int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
607 si->value_len);
608
609 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
610 new_clusters);
611 *want_clusters += new_clusters;
612 }
Tiger Yang534eadd2008-11-14 11:16:41 +0800613 return ret;
614}
615
Tiger Yang89c38bd2008-11-14 11:17:41 +0800616int ocfs2_calc_xattr_init(struct inode *dir,
617 struct buffer_head *dir_bh,
Al Viro67697cb2011-07-26 02:55:32 -0400618 umode_t mode,
Tiger Yang89c38bd2008-11-14 11:17:41 +0800619 struct ocfs2_security_xattr_info *si,
620 int *want_clusters,
621 int *xattr_credits,
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800622 int *want_meta)
Tiger Yang89c38bd2008-11-14 11:17:41 +0800623{
624 int ret = 0;
625 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
Tiger Yang0e445b62008-12-09 16:42:51 +0800626 int s_size = 0, a_size = 0, acl_len = 0, new_clusters;
Tiger Yang89c38bd2008-11-14 11:17:41 +0800627
628 if (si->enable)
629 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
630 si->value_len);
631
632 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
piaojun16c8d562018-01-31 16:14:59 -0800633 down_read(&OCFS2_I(dir)->ip_xattr_sem);
Tiger Yang89c38bd2008-11-14 11:17:41 +0800634 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
635 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
636 "", NULL, 0);
piaojun16c8d562018-01-31 16:14:59 -0800637 up_read(&OCFS2_I(dir)->ip_xattr_sem);
Tiger Yang89c38bd2008-11-14 11:17:41 +0800638 if (acl_len > 0) {
639 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
640 if (S_ISDIR(mode))
641 a_size <<= 1;
642 } else if (acl_len != 0 && acl_len != -ENODATA) {
piaojunc0a1a6d2018-01-31 16:14:51 -0800643 ret = acl_len;
Tiger Yang89c38bd2008-11-14 11:17:41 +0800644 mlog_errno(ret);
645 return ret;
646 }
647 }
648
649 if (!(s_size + a_size))
650 return ret;
651
652 /*
653 * The max space of security xattr taken inline is
654 * 256(name) + 80(value) + 16(entry) = 352 bytes,
655 * The max space of acl xattr taken inline is
656 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
657 * when blocksize = 512, may reserve one more cluser for
658 * xattr bucket, otherwise reserve one metadata block
659 * for them is ok.
Tiger Yang6c9fd1d2009-03-06 10:19:30 +0800660 * If this is a new directory with inline data,
661 * we choose to reserve the entire inline area for
662 * directory contents and force an external xattr block.
Tiger Yang89c38bd2008-11-14 11:17:41 +0800663 */
664 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
Tiger Yang6c9fd1d2009-03-06 10:19:30 +0800665 (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) ||
Tiger Yang89c38bd2008-11-14 11:17:41 +0800666 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800667 *want_meta = *want_meta + 1;
Tiger Yang89c38bd2008-11-14 11:17:41 +0800668 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
669 }
670
671 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
672 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
673 *want_clusters += 1;
674 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
675 }
676
Tiger Yang0e445b62008-12-09 16:42:51 +0800677 /*
678 * reserve credits and clusters for xattrs which has large value
679 * and have to be set outside
680 */
681 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) {
682 new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
683 si->value_len);
684 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
685 new_clusters);
686 *want_clusters += new_clusters;
687 }
Tiger Yang89c38bd2008-11-14 11:17:41 +0800688 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
689 acl_len > OCFS2_XATTR_INLINE_SIZE) {
Tiger Yang0e445b62008-12-09 16:42:51 +0800690 /* for directory, it has DEFAULT and ACCESS two types of acls */
691 new_clusters = (S_ISDIR(mode) ? 2 : 1) *
692 ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
693 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
694 new_clusters);
695 *want_clusters += new_clusters;
Tiger Yang89c38bd2008-11-14 11:17:41 +0800696 }
697
698 return ret;
699}
700
Tao Maf56654c2008-08-18 17:38:48 +0800701static int ocfs2_xattr_extend_allocation(struct inode *inode,
702 u32 clusters_to_add,
Joel Becker19b801f2008-12-09 14:36:50 -0800703 struct ocfs2_xattr_value_buf *vb,
Tao Ma78f30c32008-11-12 08:27:00 +0800704 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Maf56654c2008-08-18 17:38:48 +0800705{
Tao Maa78f9f42010-07-09 14:53:11 +0800706 int status = 0, credits;
Tao Ma85db90e2008-11-12 08:27:01 +0800707 handle_t *handle = ctxt->handle;
Tao Maf56654c2008-08-18 17:38:48 +0800708 enum ocfs2_alloc_restarted why;
Joel Becker19b801f2008-12-09 14:36:50 -0800709 u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700710 struct ocfs2_extent_tree et;
Tao Maf56654c2008-08-18 17:38:48 +0800711
Joel Becker5e404e92009-02-13 03:54:22 -0800712 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700713
Tao Maa78f9f42010-07-09 14:53:11 +0800714 while (clusters_to_add) {
Tao Ma402b4182011-02-23 22:01:17 +0800715 trace_ocfs2_xattr_extend_allocation(clusters_to_add);
716
Tao Maa78f9f42010-07-09 14:53:11 +0800717 status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
718 OCFS2_JOURNAL_ACCESS_WRITE);
719 if (status < 0) {
720 mlog_errno(status);
721 break;
722 }
723
724 prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
725 status = ocfs2_add_clusters_in_btree(handle,
726 &et,
727 &logical_start,
728 clusters_to_add,
729 0,
730 ctxt->data_ac,
731 ctxt->meta_ac,
732 &why);
733 if ((status < 0) && (status != -EAGAIN)) {
734 if (status != -ENOSPC)
735 mlog_errno(status);
736 break;
737 }
738
739 ocfs2_journal_dirty(handle, vb->vb_bh);
740
741 clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) -
742 prev_clusters;
743
744 if (why != RESTART_NONE && clusters_to_add) {
745 /*
746 * We can only fail in case the alloc file doesn't give
747 * up enough clusters.
748 */
749 BUG_ON(why == RESTART_META);
750
Tao Maa78f9f42010-07-09 14:53:11 +0800751 credits = ocfs2_calc_extend_credits(inode->i_sb,
Goldwyn Rodrigues06f9da62013-11-12 15:06:52 -0800752 &vb->vb_xv->xr_list);
Tao Maa78f9f42010-07-09 14:53:11 +0800753 status = ocfs2_extend_trans(handle, credits);
754 if (status < 0) {
755 status = -ENOMEM;
756 mlog_errno(status);
757 break;
758 }
759 }
Tao Maf56654c2008-08-18 17:38:48 +0800760 }
761
Tao Maf56654c2008-08-18 17:38:48 +0800762 return status;
763}
764
765static int __ocfs2_remove_xattr_range(struct inode *inode,
Joel Beckerd72cc722008-12-09 14:30:41 -0800766 struct ocfs2_xattr_value_buf *vb,
Tao Maf56654c2008-08-18 17:38:48 +0800767 u32 cpos, u32 phys_cpos, u32 len,
Tao Ma492a8a32009-08-18 11:43:17 +0800768 unsigned int ext_flags,
Tao Ma78f30c32008-11-12 08:27:00 +0800769 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Maf56654c2008-08-18 17:38:48 +0800770{
771 int ret;
772 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
Tao Ma85db90e2008-11-12 08:27:01 +0800773 handle_t *handle = ctxt->handle;
Joel Beckerf99b9b72008-08-20 19:36:33 -0700774 struct ocfs2_extent_tree et;
Tao Maf56654c2008-08-18 17:38:48 +0800775
Joel Becker5e404e92009-02-13 03:54:22 -0800776 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700777
Joel Becker0cf2f762009-02-12 16:41:25 -0800778 ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
Joel Beckerd72cc722008-12-09 14:30:41 -0800779 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Maf56654c2008-08-18 17:38:48 +0800780 if (ret) {
781 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +0800782 goto out;
Tao Maf56654c2008-08-18 17:38:48 +0800783 }
784
Joel Beckerdbdcf6a2009-02-13 03:41:26 -0800785 ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac,
Tao Ma78f30c32008-11-12 08:27:00 +0800786 &ctxt->dealloc);
Tao Maf56654c2008-08-18 17:38:48 +0800787 if (ret) {
788 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +0800789 goto out;
Tao Maf56654c2008-08-18 17:38:48 +0800790 }
791
Joel Beckerd72cc722008-12-09 14:30:41 -0800792 le32_add_cpu(&vb->vb_xv->xr_clusters, -len);
Joel Beckerec20cec2010-03-19 14:13:52 -0700793 ocfs2_journal_dirty(handle, vb->vb_bh);
Tao Maf56654c2008-08-18 17:38:48 +0800794
Tao Ma492a8a32009-08-18 11:43:17 +0800795 if (ext_flags & OCFS2_EXT_REFCOUNTED)
796 ret = ocfs2_decrease_refcount(inode, handle,
797 ocfs2_blocks_to_clusters(inode->i_sb,
798 phys_blkno),
799 len, ctxt->meta_ac, &ctxt->dealloc, 1);
800 else
801 ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc,
802 phys_blkno, len);
Tao Maf56654c2008-08-18 17:38:48 +0800803 if (ret)
804 mlog_errno(ret);
805
Tao Maf56654c2008-08-18 17:38:48 +0800806out:
Tao Maf56654c2008-08-18 17:38:48 +0800807 return ret;
808}
809
810static int ocfs2_xattr_shrink_size(struct inode *inode,
811 u32 old_clusters,
812 u32 new_clusters,
Joel Becker19b801f2008-12-09 14:36:50 -0800813 struct ocfs2_xattr_value_buf *vb,
Tao Ma78f30c32008-11-12 08:27:00 +0800814 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Maf56654c2008-08-18 17:38:48 +0800815{
816 int ret = 0;
Tao Ma492a8a32009-08-18 11:43:17 +0800817 unsigned int ext_flags;
Tao Maf56654c2008-08-18 17:38:48 +0800818 u32 trunc_len, cpos, phys_cpos, alloc_size;
819 u64 block;
Tao Maf56654c2008-08-18 17:38:48 +0800820
821 if (old_clusters <= new_clusters)
822 return 0;
823
824 cpos = new_clusters;
825 trunc_len = old_clusters - new_clusters;
826 while (trunc_len) {
827 ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
Joel Beckerd72cc722008-12-09 14:30:41 -0800828 &alloc_size,
Tao Ma492a8a32009-08-18 11:43:17 +0800829 &vb->vb_xv->xr_list, &ext_flags);
Tao Maf56654c2008-08-18 17:38:48 +0800830 if (ret) {
831 mlog_errno(ret);
832 goto out;
833 }
834
835 if (alloc_size > trunc_len)
836 alloc_size = trunc_len;
837
Joel Becker19b801f2008-12-09 14:36:50 -0800838 ret = __ocfs2_remove_xattr_range(inode, vb, cpos,
Tao Maf56654c2008-08-18 17:38:48 +0800839 phys_cpos, alloc_size,
Tao Ma492a8a32009-08-18 11:43:17 +0800840 ext_flags, ctxt);
Tao Maf56654c2008-08-18 17:38:48 +0800841 if (ret) {
842 mlog_errno(ret);
843 goto out;
844 }
845
846 block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
Joel Becker8cb471e2009-02-10 20:00:41 -0800847 ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode),
848 block, alloc_size);
Tao Maf56654c2008-08-18 17:38:48 +0800849 cpos += alloc_size;
850 trunc_len -= alloc_size;
851 }
852
853out:
Tao Maf56654c2008-08-18 17:38:48 +0800854 return ret;
855}
856
857static int ocfs2_xattr_value_truncate(struct inode *inode,
Joel Beckerb3e5d372008-12-09 15:01:04 -0800858 struct ocfs2_xattr_value_buf *vb,
Tao Ma78f30c32008-11-12 08:27:00 +0800859 int len,
860 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Maf56654c2008-08-18 17:38:48 +0800861{
862 int ret;
863 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
Joel Beckerb3e5d372008-12-09 15:01:04 -0800864 u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
Tao Maf56654c2008-08-18 17:38:48 +0800865
866 if (new_clusters == old_clusters)
867 return 0;
868
869 if (new_clusters > old_clusters)
870 ret = ocfs2_xattr_extend_allocation(inode,
871 new_clusters - old_clusters,
Joel Beckerb3e5d372008-12-09 15:01:04 -0800872 vb, ctxt);
Tao Maf56654c2008-08-18 17:38:48 +0800873 else
874 ret = ocfs2_xattr_shrink_size(inode,
875 old_clusters, new_clusters,
Joel Beckerb3e5d372008-12-09 15:01:04 -0800876 vb, ctxt);
Tao Maf56654c2008-08-18 17:38:48 +0800877
878 return ret;
879}
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800880
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +0100881static int ocfs2_xattr_list_entry(struct super_block *sb,
882 char *buffer, size_t size,
883 size_t *result, int type,
Tao Ma936b8832008-10-09 23:06:14 +0800884 const char *name, int name_len)
885{
886 char *p = buffer + *result;
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +0100887 const char *prefix;
888 int prefix_len;
889 int total_len;
Tao Ma936b8832008-10-09 23:06:14 +0800890
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +0100891 switch(type) {
892 case OCFS2_XATTR_INDEX_USER:
893 if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
894 return 0;
895 break;
896
897 case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS:
898 case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT:
Linus Torvalds1751e8a2017-11-27 13:05:09 -0800899 if (!(sb->s_flags & SB_POSIXACL))
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +0100900 return 0;
901 break;
902
903 case OCFS2_XATTR_INDEX_TRUSTED:
904 if (!capable(CAP_SYS_ADMIN))
905 return 0;
906 break;
907 }
908
909 prefix = ocfs2_xattr_prefix(type);
910 if (!prefix)
911 return 0;
912 prefix_len = strlen(prefix);
913 total_len = prefix_len + name_len + 1;
Tao Ma936b8832008-10-09 23:06:14 +0800914 *result += total_len;
915
916 /* we are just looking for how big our buffer needs to be */
917 if (!size)
918 return 0;
919
920 if (*result > size)
921 return -ERANGE;
922
923 memcpy(p, prefix, prefix_len);
924 memcpy(p + prefix_len, name, name_len);
925 p[prefix_len + name_len] = '\0';
926
927 return 0;
928}
929
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800930static int ocfs2_xattr_list_entries(struct inode *inode,
931 struct ocfs2_xattr_header *header,
932 char *buffer, size_t buffer_size)
933{
Tao Ma936b8832008-10-09 23:06:14 +0800934 size_t result = 0;
935 int i, type, ret;
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +0100936 const char *name;
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800937
938 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
939 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
Tao Ma936b8832008-10-09 23:06:14 +0800940 type = ocfs2_xattr_get_type(entry);
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +0100941 name = (const char *)header +
942 le16_to_cpu(entry->xe_name_offset);
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800943
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +0100944 ret = ocfs2_xattr_list_entry(inode->i_sb,
945 buffer, buffer_size,
946 &result, type, name,
947 entry->xe_name_len);
948 if (ret)
949 return ret;
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800950 }
951
Tao Ma936b8832008-10-09 23:06:14 +0800952 return result;
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800953}
954
Tao Ma8b2c0db2009-08-18 11:43:49 +0800955int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
956 struct ocfs2_dinode *di)
957{
958 struct ocfs2_xattr_header *xh;
959 int i;
960
961 xh = (struct ocfs2_xattr_header *)
962 ((void *)di + inode->i_sb->s_blocksize -
963 le16_to_cpu(di->i_xattr_inline_size));
964
965 for (i = 0; i < le16_to_cpu(xh->xh_count); i++)
966 if (!ocfs2_xattr_is_local(&xh->xh_entries[i]))
967 return 1;
968
969 return 0;
970}
971
Tiger Yangcf1d6c72008-08-18 17:11:00 +0800972static int ocfs2_xattr_ibody_list(struct inode *inode,
973 struct ocfs2_dinode *di,
974 char *buffer,
975 size_t buffer_size)
976{
977 struct ocfs2_xattr_header *header = NULL;
978 struct ocfs2_inode_info *oi = OCFS2_I(inode);
979 int ret = 0;
980
981 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
982 return ret;
983
984 header = (struct ocfs2_xattr_header *)
985 ((void *)di + inode->i_sb->s_blocksize -
986 le16_to_cpu(di->i_xattr_inline_size));
987
988 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
989
990 return ret;
991}
992
993static int ocfs2_xattr_block_list(struct inode *inode,
994 struct ocfs2_dinode *di,
995 char *buffer,
996 size_t buffer_size)
997{
998 struct buffer_head *blk_bh = NULL;
Tao Ma0c044f02008-08-18 17:38:50 +0800999 struct ocfs2_xattr_block *xb;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001000 int ret = 0;
1001
1002 if (!di->i_xattr_loc)
1003 return ret;
1004
Joel Becker4ae1d692008-11-13 14:49:18 -08001005 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
1006 &blk_bh);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001007 if (ret < 0) {
1008 mlog_errno(ret);
1009 return ret;
1010 }
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001011
Tao Ma0c044f02008-08-18 17:38:50 +08001012 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
Tao Ma0c044f02008-08-18 17:38:50 +08001013 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
1014 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
1015 ret = ocfs2_xattr_list_entries(inode, header,
1016 buffer, buffer_size);
Tao Ma47bca492009-08-18 11:43:42 +08001017 } else
1018 ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh,
Tao Ma0c044f02008-08-18 17:38:50 +08001019 buffer, buffer_size);
Joel Becker4ae1d692008-11-13 14:49:18 -08001020
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001021 brelse(blk_bh);
1022
1023 return ret;
1024}
1025
1026ssize_t ocfs2_listxattr(struct dentry *dentry,
1027 char *buffer,
1028 size_t size)
1029{
1030 int ret = 0, i_ret = 0, b_ret = 0;
1031 struct buffer_head *di_bh = NULL;
1032 struct ocfs2_dinode *di = NULL;
David Howells2b0143b2015-03-17 22:25:59 +00001033 struct ocfs2_inode_info *oi = OCFS2_I(d_inode(dentry));
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001034
Tiger Yang8154da32008-08-18 17:11:46 +08001035 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
1036 return -EOPNOTSUPP;
1037
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001038 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1039 return ret;
1040
David Howells2b0143b2015-03-17 22:25:59 +00001041 ret = ocfs2_inode_lock(d_inode(dentry), &di_bh, 0);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001042 if (ret < 0) {
1043 mlog_errno(ret);
1044 return ret;
1045 }
1046
1047 di = (struct ocfs2_dinode *)di_bh->b_data;
1048
1049 down_read(&oi->ip_xattr_sem);
David Howells2b0143b2015-03-17 22:25:59 +00001050 i_ret = ocfs2_xattr_ibody_list(d_inode(dentry), di, buffer, size);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001051 if (i_ret < 0)
1052 b_ret = 0;
1053 else {
1054 if (buffer) {
1055 buffer += i_ret;
1056 size -= i_ret;
1057 }
David Howells2b0143b2015-03-17 22:25:59 +00001058 b_ret = ocfs2_xattr_block_list(d_inode(dentry), di,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001059 buffer, size);
1060 if (b_ret < 0)
1061 i_ret = 0;
1062 }
1063 up_read(&oi->ip_xattr_sem);
David Howells2b0143b2015-03-17 22:25:59 +00001064 ocfs2_inode_unlock(d_inode(dentry), 0);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001065
1066 brelse(di_bh);
1067
1068 return i_ret + b_ret;
1069}
1070
1071static int ocfs2_xattr_find_entry(int name_index,
1072 const char *name,
1073 struct ocfs2_xattr_search *xs)
1074{
1075 struct ocfs2_xattr_entry *entry;
1076 size_t name_len;
1077 int i, cmp = 1;
1078
1079 if (name == NULL)
1080 return -EINVAL;
1081
1082 name_len = strlen(name);
1083 entry = xs->here;
1084 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
1085 cmp = name_index - ocfs2_xattr_get_type(entry);
1086 if (!cmp)
1087 cmp = name_len - entry->xe_name_len;
1088 if (!cmp)
1089 cmp = memcmp(name, (xs->base +
1090 le16_to_cpu(entry->xe_name_offset)),
1091 name_len);
1092 if (cmp == 0)
1093 break;
1094 entry += 1;
1095 }
1096 xs->here = entry;
1097
1098 return cmp ? -ENODATA : 0;
1099}
1100
1101static int ocfs2_xattr_get_value_outside(struct inode *inode,
Tao Ma589dc262008-08-18 17:38:51 +08001102 struct ocfs2_xattr_value_root *xv,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001103 void *buffer,
1104 size_t len)
1105{
1106 u32 cpos, p_cluster, num_clusters, bpc, clusters;
1107 u64 blkno;
1108 int i, ret = 0;
1109 size_t cplen, blocksize;
1110 struct buffer_head *bh = NULL;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001111 struct ocfs2_extent_list *el;
1112
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001113 el = &xv->xr_list;
1114 clusters = le32_to_cpu(xv->xr_clusters);
1115 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1116 blocksize = inode->i_sb->s_blocksize;
1117
1118 cpos = 0;
1119 while (cpos < clusters) {
1120 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
Tao Ma1061f9c2009-08-18 11:41:57 +08001121 &num_clusters, el, NULL);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001122 if (ret) {
1123 mlog_errno(ret);
1124 goto out;
1125 }
1126
1127 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1128 /* Copy ocfs2_xattr_value */
1129 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
Joel Becker8cb471e2009-02-10 20:00:41 -08001130 ret = ocfs2_read_block(INODE_CACHE(inode), blkno,
1131 &bh, NULL);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001132 if (ret) {
1133 mlog_errno(ret);
1134 goto out;
1135 }
1136
1137 cplen = len >= blocksize ? blocksize : len;
1138 memcpy(buffer, bh->b_data, cplen);
1139 len -= cplen;
1140 buffer += cplen;
1141
1142 brelse(bh);
1143 bh = NULL;
1144 if (len == 0)
1145 break;
1146 }
1147 cpos += num_clusters;
1148 }
1149out:
1150 return ret;
1151}
1152
1153static int ocfs2_xattr_ibody_get(struct inode *inode,
1154 int name_index,
1155 const char *name,
1156 void *buffer,
1157 size_t buffer_size,
1158 struct ocfs2_xattr_search *xs)
1159{
1160 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1161 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
Tao Ma589dc262008-08-18 17:38:51 +08001162 struct ocfs2_xattr_value_root *xv;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001163 size_t size;
1164 int ret = 0;
1165
1166 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
1167 return -ENODATA;
1168
1169 xs->end = (void *)di + inode->i_sb->s_blocksize;
1170 xs->header = (struct ocfs2_xattr_header *)
1171 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1172 xs->base = (void *)xs->header;
1173 xs->here = xs->header->xh_entries;
1174
1175 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1176 if (ret)
1177 return ret;
1178 size = le64_to_cpu(xs->here->xe_value_size);
1179 if (buffer) {
1180 if (size > buffer_size)
1181 return -ERANGE;
1182 if (ocfs2_xattr_is_local(xs->here)) {
1183 memcpy(buffer, (void *)xs->base +
1184 le16_to_cpu(xs->here->xe_name_offset) +
1185 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
1186 } else {
Tao Ma589dc262008-08-18 17:38:51 +08001187 xv = (struct ocfs2_xattr_value_root *)
1188 (xs->base + le16_to_cpu(
1189 xs->here->xe_name_offset) +
1190 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
1191 ret = ocfs2_xattr_get_value_outside(inode, xv,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001192 buffer, size);
1193 if (ret < 0) {
1194 mlog_errno(ret);
1195 return ret;
1196 }
1197 }
1198 }
1199
1200 return size;
1201}
1202
1203static int ocfs2_xattr_block_get(struct inode *inode,
1204 int name_index,
1205 const char *name,
1206 void *buffer,
1207 size_t buffer_size,
1208 struct ocfs2_xattr_search *xs)
1209{
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001210 struct ocfs2_xattr_block *xb;
Tao Ma589dc262008-08-18 17:38:51 +08001211 struct ocfs2_xattr_value_root *xv;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001212 size_t size;
Subrata Modak44d8e4e2009-07-14 01:19:31 +05301213 int ret = -ENODATA, name_offset, name_len, i;
1214 int uninitialized_var(block_off);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001215
Joel Beckerba937122008-10-24 19:13:20 -07001216 xs->bucket = ocfs2_xattr_bucket_new(inode);
1217 if (!xs->bucket) {
1218 ret = -ENOMEM;
1219 mlog_errno(ret);
1220 goto cleanup;
1221 }
Tao Ma589dc262008-08-18 17:38:51 +08001222
Joel Becker54f443f2008-10-20 18:43:07 -07001223 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1224 if (ret) {
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001225 mlog_errno(ret);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001226 goto cleanup;
1227 }
1228
Tiger Yang6c1e1832008-11-02 19:04:21 +08001229 if (xs->not_found) {
1230 ret = -ENODATA;
1231 goto cleanup;
1232 }
1233
Joel Becker54f443f2008-10-20 18:43:07 -07001234 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001235 size = le64_to_cpu(xs->here->xe_value_size);
1236 if (buffer) {
1237 ret = -ERANGE;
1238 if (size > buffer_size)
1239 goto cleanup;
Tao Ma589dc262008-08-18 17:38:51 +08001240
1241 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1242 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1243 i = xs->here - xs->header->xh_entries;
1244
1245 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
Tao Mafd68a892009-08-18 11:43:21 +08001246 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
Joel Beckerba937122008-10-24 19:13:20 -07001247 bucket_xh(xs->bucket),
Tao Ma589dc262008-08-18 17:38:51 +08001248 i,
1249 &block_off,
1250 &name_offset);
Joseph Qi023d4ea2015-04-14 15:43:33 -07001251 if (ret) {
1252 mlog_errno(ret);
1253 goto cleanup;
1254 }
Joel Beckerba937122008-10-24 19:13:20 -07001255 xs->base = bucket_block(xs->bucket, block_off);
Tao Ma589dc262008-08-18 17:38:51 +08001256 }
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001257 if (ocfs2_xattr_is_local(xs->here)) {
1258 memcpy(buffer, (void *)xs->base +
Tao Ma589dc262008-08-18 17:38:51 +08001259 name_offset + name_len, size);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001260 } else {
Tao Ma589dc262008-08-18 17:38:51 +08001261 xv = (struct ocfs2_xattr_value_root *)
1262 (xs->base + name_offset + name_len);
1263 ret = ocfs2_xattr_get_value_outside(inode, xv,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001264 buffer, size);
1265 if (ret < 0) {
1266 mlog_errno(ret);
1267 goto cleanup;
1268 }
1269 }
1270 }
1271 ret = size;
1272cleanup:
Joel Beckerba937122008-10-24 19:13:20 -07001273 ocfs2_xattr_bucket_free(xs->bucket);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001274
Joel Becker54f443f2008-10-20 18:43:07 -07001275 brelse(xs->xattr_bh);
1276 xs->xattr_bh = NULL;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001277 return ret;
1278}
1279
Tiger Yang4e3e9d02008-11-14 11:16:53 +08001280int ocfs2_xattr_get_nolock(struct inode *inode,
1281 struct buffer_head *di_bh,
Tiger Yang0030e002008-10-23 16:33:33 +08001282 int name_index,
1283 const char *name,
1284 void *buffer,
1285 size_t buffer_size)
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001286{
1287 int ret;
1288 struct ocfs2_dinode *di = NULL;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001289 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1290 struct ocfs2_xattr_search xis = {
1291 .not_found = -ENODATA,
1292 };
1293 struct ocfs2_xattr_search xbs = {
1294 .not_found = -ENODATA,
1295 };
1296
Tiger Yang8154da32008-08-18 17:11:46 +08001297 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1298 return -EOPNOTSUPP;
1299
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001300 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
Jan Kara2b693002014-12-10 15:41:40 -08001301 return -ENODATA;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001302
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001303 xis.inode_bh = xbs.inode_bh = di_bh;
1304 di = (struct ocfs2_dinode *)di_bh->b_data;
1305
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001306 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1307 buffer_size, &xis);
Tiger Yang6c1e1832008-11-02 19:04:21 +08001308 if (ret == -ENODATA && di->i_xattr_loc)
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001309 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1310 buffer_size, &xbs);
Tiger Yang4e3e9d02008-11-14 11:16:53 +08001311
1312 return ret;
1313}
1314
1315/* ocfs2_xattr_get()
1316 *
1317 * Copy an extended attribute into the buffer provided.
1318 * Buffer is NULL to compute the size of buffer required.
1319 */
1320static int ocfs2_xattr_get(struct inode *inode,
1321 int name_index,
1322 const char *name,
1323 void *buffer,
1324 size_t buffer_size)
1325{
Eric Ren8818efa2017-06-23 15:08:55 -07001326 int ret, had_lock;
Tiger Yang4e3e9d02008-11-14 11:16:53 +08001327 struct buffer_head *di_bh = NULL;
Eric Ren8818efa2017-06-23 15:08:55 -07001328 struct ocfs2_lock_holder oh;
Tiger Yang4e3e9d02008-11-14 11:16:53 +08001329
Eric Ren8818efa2017-06-23 15:08:55 -07001330 had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 0, &oh);
1331 if (had_lock < 0) {
1332 mlog_errno(had_lock);
1333 return had_lock;
Tiger Yang4e3e9d02008-11-14 11:16:53 +08001334 }
Tao Ma5e64b0d2010-09-07 13:30:05 +08001335 down_read(&OCFS2_I(inode)->ip_xattr_sem);
Tiger Yang4e3e9d02008-11-14 11:16:53 +08001336 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1337 name, buffer, buffer_size);
Tao Ma5e64b0d2010-09-07 13:30:05 +08001338 up_read(&OCFS2_I(inode)->ip_xattr_sem);
Tiger Yang4e3e9d02008-11-14 11:16:53 +08001339
Eric Ren8818efa2017-06-23 15:08:55 -07001340 ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001341
1342 brelse(di_bh);
1343
1344 return ret;
1345}
1346
1347static int __ocfs2_xattr_set_value_outside(struct inode *inode,
Tao Ma85db90e2008-11-12 08:27:01 +08001348 handle_t *handle,
Tao Ma492a8a32009-08-18 11:43:17 +08001349 struct ocfs2_xattr_value_buf *vb,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001350 const void *value,
1351 int value_len)
1352{
Tao Ma71d548a2008-12-05 06:20:54 +08001353 int ret = 0, i, cp_len;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001354 u16 blocksize = inode->i_sb->s_blocksize;
1355 u32 p_cluster, num_clusters;
1356 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1357 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1358 u64 blkno;
1359 struct buffer_head *bh = NULL;
Tao Ma492a8a32009-08-18 11:43:17 +08001360 unsigned int ext_flags;
1361 struct ocfs2_xattr_value_root *xv = vb->vb_xv;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001362
1363 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1364
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001365 while (cpos < clusters) {
1366 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
Tao Ma1061f9c2009-08-18 11:41:57 +08001367 &num_clusters, &xv->xr_list,
Tao Ma492a8a32009-08-18 11:43:17 +08001368 &ext_flags);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001369 if (ret) {
1370 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08001371 goto out;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001372 }
1373
Tao Ma492a8a32009-08-18 11:43:17 +08001374 BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED);
1375
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001376 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1377
1378 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
Joel Becker8cb471e2009-02-10 20:00:41 -08001379 ret = ocfs2_read_block(INODE_CACHE(inode), blkno,
1380 &bh, NULL);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001381 if (ret) {
1382 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08001383 goto out;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001384 }
1385
1386 ret = ocfs2_journal_access(handle,
Joel Becker0cf2f762009-02-12 16:41:25 -08001387 INODE_CACHE(inode),
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001388 bh,
1389 OCFS2_JOURNAL_ACCESS_WRITE);
1390 if (ret < 0) {
1391 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08001392 goto out;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001393 }
1394
1395 cp_len = value_len > blocksize ? blocksize : value_len;
1396 memcpy(bh->b_data, value, cp_len);
1397 value_len -= cp_len;
1398 value += cp_len;
1399 if (cp_len < blocksize)
1400 memset(bh->b_data + cp_len, 0,
1401 blocksize - cp_len);
1402
Joel Beckerec20cec2010-03-19 14:13:52 -07001403 ocfs2_journal_dirty(handle, bh);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001404 brelse(bh);
1405 bh = NULL;
1406
1407 /*
1408 * XXX: do we need to empty all the following
1409 * blocks in this cluster?
1410 */
1411 if (!value_len)
1412 break;
1413 }
1414 cpos += num_clusters;
1415 }
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001416out:
1417 brelse(bh);
1418
1419 return ret;
1420}
1421
Joel Becker69a3e532009-08-17 12:24:39 -07001422static int ocfs2_xa_check_space_helper(int needed_space, int free_start,
1423 int num_entries)
1424{
1425 int free_space;
1426
1427 if (!needed_space)
1428 return 0;
1429
1430 free_space = free_start -
1431 sizeof(struct ocfs2_xattr_header) -
1432 (num_entries * sizeof(struct ocfs2_xattr_entry)) -
1433 OCFS2_XATTR_HEADER_GAP;
1434 if (free_space < 0)
1435 return -EIO;
1436 if (free_space < needed_space)
1437 return -ENOSPC;
1438
1439 return 0;
1440}
1441
Joel Beckercf2bc802009-08-18 13:52:38 -07001442static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc,
1443 int type)
1444{
1445 return loc->xl_ops->xlo_journal_access(handle, loc, type);
1446}
1447
1448static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc)
1449{
1450 loc->xl_ops->xlo_journal_dirty(handle, loc);
1451}
1452
Joel Becker69a3e532009-08-17 12:24:39 -07001453/* Give a pointer into the storage for the given offset */
1454static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset)
1455{
1456 BUG_ON(offset >= loc->xl_size);
1457 return loc->xl_ops->xlo_offset_pointer(loc, offset);
1458}
1459
Tiger Yangcf1d6c72008-08-18 17:11:00 +08001460/*
Joel Becker11179f22009-08-14 16:07:44 -07001461 * Wipe the name+value pair and allow the storage to reclaim it. This
1462 * must be followed by either removal of the entry or a call to
1463 * ocfs2_xa_add_namevalue().
1464 */
1465static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc)
1466{
1467 loc->xl_ops->xlo_wipe_namevalue(loc);
1468}
1469
Joel Becker69a3e532009-08-17 12:24:39 -07001470/*
1471 * Find lowest offset to a name+value pair. This is the start of our
1472 * downward-growing free space.
1473 */
1474static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc)
1475{
1476 return loc->xl_ops->xlo_get_free_start(loc);
1477}
1478
1479/* Can we reuse loc->xl_entry for xi? */
1480static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc,
1481 struct ocfs2_xattr_info *xi)
1482{
1483 return loc->xl_ops->xlo_can_reuse(loc, xi);
1484}
1485
1486/* How much free space is needed to set the new value */
1487static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc,
1488 struct ocfs2_xattr_info *xi)
1489{
1490 return loc->xl_ops->xlo_check_space(loc, xi);
1491}
1492
Joel Becker69a3e532009-08-17 12:24:39 -07001493static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc,
1494 struct ocfs2_xattr_info *xi)
1495{
1496 int size = namevalue_size_xi(xi);
1497 int nameval_offset;
1498 char *nameval_buf;
1499
1500 loc->xl_ops->xlo_add_namevalue(loc, size);
1501 loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
1502 loc->xl_entry->xe_name_len = xi->xi_name_len;
1503 ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index);
1504 ocfs2_xattr_set_local(loc->xl_entry,
1505 xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE);
1506
1507 nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1508 nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
1509 memset(nameval_buf, 0, size);
1510 memcpy(nameval_buf, xi->xi_name, xi->xi_name_len);
1511}
1512
Joel Becker3fc12af2009-08-18 13:20:27 -07001513static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc,
1514 struct ocfs2_xattr_value_buf *vb)
1515{
1516 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1517 int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
1518
1519 /* Value bufs are for value trees */
Joel Becker73857ee2009-08-18 20:26:41 -07001520 BUG_ON(ocfs2_xattr_is_local(loc->xl_entry));
Joel Becker3fc12af2009-08-18 13:20:27 -07001521 BUG_ON(namevalue_size_xe(loc->xl_entry) !=
1522 (name_size + OCFS2_XATTR_ROOT_SIZE));
1523
1524 loc->xl_ops->xlo_fill_value_buf(loc, vb);
1525 vb->vb_xv =
1526 (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc,
1527 nameval_offset +
1528 name_size);
1529}
1530
Joel Beckercf2bc802009-08-18 13:52:38 -07001531static int ocfs2_xa_block_journal_access(handle_t *handle,
1532 struct ocfs2_xa_loc *loc, int type)
1533{
1534 struct buffer_head *bh = loc->xl_storage;
1535 ocfs2_journal_access_func access;
1536
1537 if (loc->xl_size == (bh->b_size -
1538 offsetof(struct ocfs2_xattr_block,
1539 xb_attrs.xb_header)))
1540 access = ocfs2_journal_access_xb;
1541 else
1542 access = ocfs2_journal_access_di;
1543 return access(handle, INODE_CACHE(loc->xl_inode), bh, type);
1544}
1545
1546static void ocfs2_xa_block_journal_dirty(handle_t *handle,
1547 struct ocfs2_xa_loc *loc)
1548{
1549 struct buffer_head *bh = loc->xl_storage;
1550
1551 ocfs2_journal_dirty(handle, bh);
1552}
1553
Joel Becker11179f22009-08-14 16:07:44 -07001554static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc,
1555 int offset)
1556{
Joel Becker11179f22009-08-14 16:07:44 -07001557 return (char *)loc->xl_header + offset;
1558}
1559
Joel Becker69a3e532009-08-17 12:24:39 -07001560static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc,
1561 struct ocfs2_xattr_info *xi)
1562{
1563 /*
1564 * Block storage is strict. If the sizes aren't exact, we will
1565 * remove the old one and reinsert the new.
1566 */
1567 return namevalue_size_xe(loc->xl_entry) ==
1568 namevalue_size_xi(xi);
1569}
1570
1571static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc)
1572{
1573 struct ocfs2_xattr_header *xh = loc->xl_header;
1574 int i, count = le16_to_cpu(xh->xh_count);
1575 int offset, free_start = loc->xl_size;
1576
1577 for (i = 0; i < count; i++) {
1578 offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
1579 if (offset < free_start)
1580 free_start = offset;
1581 }
1582
1583 return free_start;
1584}
1585
1586static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc,
1587 struct ocfs2_xattr_info *xi)
1588{
1589 int count = le16_to_cpu(loc->xl_header->xh_count);
1590 int free_start = ocfs2_xa_get_free_start(loc);
1591 int needed_space = ocfs2_xi_entry_usage(xi);
1592
1593 /*
1594 * Block storage will reclaim the original entry before inserting
1595 * the new value, so we only need the difference. If the new
1596 * entry is smaller than the old one, we don't need anything.
1597 */
1598 if (loc->xl_entry) {
1599 /* Don't need space if we're reusing! */
1600 if (ocfs2_xa_can_reuse_entry(loc, xi))
1601 needed_space = 0;
1602 else
1603 needed_space -= ocfs2_xe_entry_usage(loc->xl_entry);
1604 }
1605 if (needed_space < 0)
1606 needed_space = 0;
1607 return ocfs2_xa_check_space_helper(needed_space, free_start, count);
1608}
1609
Joel Becker11179f22009-08-14 16:07:44 -07001610/*
1611 * Block storage for xattrs keeps the name+value pairs compacted. When
1612 * we remove one, we have to shift any that preceded it towards the end.
1613 */
1614static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc)
1615{
1616 int i, offset;
1617 int namevalue_offset, first_namevalue_offset, namevalue_size;
1618 struct ocfs2_xattr_entry *entry = loc->xl_entry;
1619 struct ocfs2_xattr_header *xh = loc->xl_header;
Joel Becker11179f22009-08-14 16:07:44 -07001620 int count = le16_to_cpu(xh->xh_count);
1621
1622 namevalue_offset = le16_to_cpu(entry->xe_name_offset);
Joel Becker199799a2009-08-14 19:04:15 -07001623 namevalue_size = namevalue_size_xe(entry);
Joel Becker69a3e532009-08-17 12:24:39 -07001624 first_namevalue_offset = ocfs2_xa_get_free_start(loc);
Joel Becker11179f22009-08-14 16:07:44 -07001625
1626 /* Shift the name+value pairs */
1627 memmove((char *)xh + first_namevalue_offset + namevalue_size,
1628 (char *)xh + first_namevalue_offset,
1629 namevalue_offset - first_namevalue_offset);
1630 memset((char *)xh + first_namevalue_offset, 0, namevalue_size);
1631
1632 /* Now tell xh->xh_entries about it */
1633 for (i = 0; i < count; i++) {
1634 offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
Tao Madfe4d3d2010-03-19 15:04:23 +08001635 if (offset <= namevalue_offset)
Joel Becker11179f22009-08-14 16:07:44 -07001636 le16_add_cpu(&xh->xh_entries[i].xe_name_offset,
1637 namevalue_size);
1638 }
1639
1640 /*
1641 * Note that we don't update xh_free_start or xh_name_value_len
1642 * because they're not used in block-stored xattrs.
1643 */
1644}
1645
Joel Becker69a3e532009-08-17 12:24:39 -07001646static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
1647{
1648 int count = le16_to_cpu(loc->xl_header->xh_count);
1649 loc->xl_entry = &(loc->xl_header->xh_entries[count]);
1650 le16_add_cpu(&loc->xl_header->xh_count, 1);
1651 memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
1652}
1653
1654static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size)
1655{
1656 int free_start = ocfs2_xa_get_free_start(loc);
1657
1658 loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size);
1659}
1660
Joel Becker3fc12af2009-08-18 13:20:27 -07001661static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc,
1662 struct ocfs2_xattr_value_buf *vb)
1663{
1664 struct buffer_head *bh = loc->xl_storage;
1665
1666 if (loc->xl_size == (bh->b_size -
1667 offsetof(struct ocfs2_xattr_block,
1668 xb_attrs.xb_header)))
1669 vb->vb_access = ocfs2_journal_access_xb;
1670 else
1671 vb->vb_access = ocfs2_journal_access_di;
1672 vb->vb_bh = bh;
1673}
1674
Joel Becker11179f22009-08-14 16:07:44 -07001675/*
1676 * Operations for xattrs stored in blocks. This includes inline inode
1677 * storage and unindexed ocfs2_xattr_blocks.
1678 */
1679static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = {
Joel Beckercf2bc802009-08-18 13:52:38 -07001680 .xlo_journal_access = ocfs2_xa_block_journal_access,
1681 .xlo_journal_dirty = ocfs2_xa_block_journal_dirty,
Joel Becker11179f22009-08-14 16:07:44 -07001682 .xlo_offset_pointer = ocfs2_xa_block_offset_pointer,
Joel Becker69a3e532009-08-17 12:24:39 -07001683 .xlo_check_space = ocfs2_xa_block_check_space,
1684 .xlo_can_reuse = ocfs2_xa_block_can_reuse,
1685 .xlo_get_free_start = ocfs2_xa_block_get_free_start,
Joel Becker11179f22009-08-14 16:07:44 -07001686 .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue,
Joel Becker69a3e532009-08-17 12:24:39 -07001687 .xlo_add_entry = ocfs2_xa_block_add_entry,
1688 .xlo_add_namevalue = ocfs2_xa_block_add_namevalue,
Joel Becker3fc12af2009-08-18 13:20:27 -07001689 .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf,
Joel Becker11179f22009-08-14 16:07:44 -07001690};
1691
Joel Beckercf2bc802009-08-18 13:52:38 -07001692static int ocfs2_xa_bucket_journal_access(handle_t *handle,
1693 struct ocfs2_xa_loc *loc, int type)
1694{
1695 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1696
1697 return ocfs2_xattr_bucket_journal_access(handle, bucket, type);
1698}
1699
1700static void ocfs2_xa_bucket_journal_dirty(handle_t *handle,
1701 struct ocfs2_xa_loc *loc)
1702{
1703 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1704
1705 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
1706}
1707
Joel Becker11179f22009-08-14 16:07:44 -07001708static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc,
1709 int offset)
1710{
1711 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1712 int block, block_offset;
1713
Joel Becker11179f22009-08-14 16:07:44 -07001714 /* The header is at the front of the bucket */
Joel Beckercf2bc802009-08-18 13:52:38 -07001715 block = offset >> loc->xl_inode->i_sb->s_blocksize_bits;
1716 block_offset = offset % loc->xl_inode->i_sb->s_blocksize;
Joel Becker11179f22009-08-14 16:07:44 -07001717
1718 return bucket_block(bucket, block) + block_offset;
1719}
1720
Joel Becker69a3e532009-08-17 12:24:39 -07001721static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc,
1722 struct ocfs2_xattr_info *xi)
1723{
1724 return namevalue_size_xe(loc->xl_entry) >=
1725 namevalue_size_xi(xi);
1726}
1727
1728static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc)
1729{
1730 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1731 return le16_to_cpu(bucket_xh(bucket)->xh_free_start);
1732}
1733
1734static int ocfs2_bucket_align_free_start(struct super_block *sb,
1735 int free_start, int size)
1736{
1737 /*
1738 * We need to make sure that the name+value pair fits within
1739 * one block.
1740 */
1741 if (((free_start - size) >> sb->s_blocksize_bits) !=
1742 ((free_start - 1) >> sb->s_blocksize_bits))
1743 free_start -= free_start % sb->s_blocksize;
1744
1745 return free_start;
1746}
1747
1748static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc,
1749 struct ocfs2_xattr_info *xi)
1750{
1751 int rc;
1752 int count = le16_to_cpu(loc->xl_header->xh_count);
1753 int free_start = ocfs2_xa_get_free_start(loc);
1754 int needed_space = ocfs2_xi_entry_usage(xi);
1755 int size = namevalue_size_xi(xi);
Joel Beckercf2bc802009-08-18 13:52:38 -07001756 struct super_block *sb = loc->xl_inode->i_sb;
Joel Becker69a3e532009-08-17 12:24:39 -07001757
1758 /*
1759 * Bucket storage does not reclaim name+value pairs it cannot
1760 * reuse. They live as holes until the bucket fills, and then
1761 * the bucket is defragmented. However, the bucket can reclaim
1762 * the ocfs2_xattr_entry.
1763 */
1764 if (loc->xl_entry) {
1765 /* Don't need space if we're reusing! */
1766 if (ocfs2_xa_can_reuse_entry(loc, xi))
1767 needed_space = 0;
1768 else
1769 needed_space -= sizeof(struct ocfs2_xattr_entry);
1770 }
1771 BUG_ON(needed_space < 0);
1772
1773 if (free_start < size) {
1774 if (needed_space)
1775 return -ENOSPC;
1776 } else {
1777 /*
1778 * First we check if it would fit in the first place.
1779 * Below, we align the free start to a block. This may
1780 * slide us below the minimum gap. By checking unaligned
1781 * first, we avoid that error.
1782 */
1783 rc = ocfs2_xa_check_space_helper(needed_space, free_start,
1784 count);
1785 if (rc)
1786 return rc;
1787 free_start = ocfs2_bucket_align_free_start(sb, free_start,
1788 size);
1789 }
1790 return ocfs2_xa_check_space_helper(needed_space, free_start, count);
1791}
1792
Joel Becker11179f22009-08-14 16:07:44 -07001793static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc)
1794{
Joel Becker199799a2009-08-14 19:04:15 -07001795 le16_add_cpu(&loc->xl_header->xh_name_value_len,
1796 -namevalue_size_xe(loc->xl_entry));
Joel Becker11179f22009-08-14 16:07:44 -07001797}
1798
Joel Becker69a3e532009-08-17 12:24:39 -07001799static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
1800{
1801 struct ocfs2_xattr_header *xh = loc->xl_header;
1802 int count = le16_to_cpu(xh->xh_count);
1803 int low = 0, high = count - 1, tmp;
1804 struct ocfs2_xattr_entry *tmp_xe;
1805
1806 /*
1807 * We keep buckets sorted by name_hash, so we need to find
1808 * our insert place.
1809 */
1810 while (low <= high && count) {
1811 tmp = (low + high) / 2;
1812 tmp_xe = &xh->xh_entries[tmp];
1813
1814 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
1815 low = tmp + 1;
1816 else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash))
1817 high = tmp - 1;
1818 else {
1819 low = tmp;
1820 break;
1821 }
1822 }
1823
1824 if (low != count)
1825 memmove(&xh->xh_entries[low + 1],
1826 &xh->xh_entries[low],
1827 ((count - low) * sizeof(struct ocfs2_xattr_entry)));
1828
1829 le16_add_cpu(&xh->xh_count, 1);
1830 loc->xl_entry = &xh->xh_entries[low];
1831 memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
1832}
1833
1834static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size)
1835{
1836 int free_start = ocfs2_xa_get_free_start(loc);
1837 struct ocfs2_xattr_header *xh = loc->xl_header;
Joel Beckercf2bc802009-08-18 13:52:38 -07001838 struct super_block *sb = loc->xl_inode->i_sb;
Joel Becker69a3e532009-08-17 12:24:39 -07001839 int nameval_offset;
1840
1841 free_start = ocfs2_bucket_align_free_start(sb, free_start, size);
1842 nameval_offset = free_start - size;
1843 loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset);
1844 xh->xh_free_start = cpu_to_le16(nameval_offset);
1845 le16_add_cpu(&xh->xh_name_value_len, size);
1846
1847}
1848
Joel Becker3fc12af2009-08-18 13:20:27 -07001849static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc,
1850 struct ocfs2_xattr_value_buf *vb)
1851{
1852 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
Joel Beckercf2bc802009-08-18 13:52:38 -07001853 struct super_block *sb = loc->xl_inode->i_sb;
Joel Becker3fc12af2009-08-18 13:20:27 -07001854 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1855 int size = namevalue_size_xe(loc->xl_entry);
1856 int block_offset = nameval_offset >> sb->s_blocksize_bits;
1857
1858 /* Values are not allowed to straddle block boundaries */
1859 BUG_ON(block_offset !=
1860 ((nameval_offset + size - 1) >> sb->s_blocksize_bits));
1861 /* We expect the bucket to be filled in */
1862 BUG_ON(!bucket->bu_bhs[block_offset]);
1863
1864 vb->vb_access = ocfs2_journal_access;
1865 vb->vb_bh = bucket->bu_bhs[block_offset];
1866}
1867
Joel Becker11179f22009-08-14 16:07:44 -07001868/* Operations for xattrs stored in buckets. */
1869static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = {
Joel Beckercf2bc802009-08-18 13:52:38 -07001870 .xlo_journal_access = ocfs2_xa_bucket_journal_access,
1871 .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty,
Joel Becker11179f22009-08-14 16:07:44 -07001872 .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer,
Joel Becker69a3e532009-08-17 12:24:39 -07001873 .xlo_check_space = ocfs2_xa_bucket_check_space,
1874 .xlo_can_reuse = ocfs2_xa_bucket_can_reuse,
1875 .xlo_get_free_start = ocfs2_xa_bucket_get_free_start,
Joel Becker11179f22009-08-14 16:07:44 -07001876 .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue,
Joel Becker69a3e532009-08-17 12:24:39 -07001877 .xlo_add_entry = ocfs2_xa_bucket_add_entry,
1878 .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue,
Joel Becker3fc12af2009-08-18 13:20:27 -07001879 .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf,
Joel Becker11179f22009-08-14 16:07:44 -07001880};
1881
Joel Becker399ff3a72009-09-01 18:38:27 -07001882static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc)
1883{
1884 struct ocfs2_xattr_value_buf vb;
1885
1886 if (ocfs2_xattr_is_local(loc->xl_entry))
1887 return 0;
1888
1889 ocfs2_xa_fill_value_buf(loc, &vb);
1890 return le32_to_cpu(vb.vb_xv->xr_clusters);
1891}
1892
Joel Becker73857ee2009-08-18 20:26:41 -07001893static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes,
1894 struct ocfs2_xattr_set_ctxt *ctxt)
1895{
1896 int trunc_rc, access_rc;
1897 struct ocfs2_xattr_value_buf vb;
1898
1899 ocfs2_xa_fill_value_buf(loc, &vb);
1900 trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes,
1901 ctxt);
1902
1903 /*
1904 * The caller of ocfs2_xa_value_truncate() has already called
1905 * ocfs2_xa_journal_access on the loc. However, The truncate code
1906 * calls ocfs2_extend_trans(). This may commit the previous
1907 * transaction and open a new one. If this is a bucket, truncate
1908 * could leave only vb->vb_bh set up for journaling. Meanwhile,
1909 * the caller is expecting to dirty the entire bucket. So we must
1910 * reset the journal work. We do this even if truncate has failed,
1911 * as it could have failed after committing the extend.
1912 */
1913 access_rc = ocfs2_xa_journal_access(ctxt->handle, loc,
1914 OCFS2_JOURNAL_ACCESS_WRITE);
1915
1916 /* Errors in truncate take precedence */
1917 return trunc_rc ? trunc_rc : access_rc;
1918}
1919
Joel Becker11179f22009-08-14 16:07:44 -07001920static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
1921{
Joel Beckerbde1e542009-08-14 16:58:38 -07001922 int index, count;
1923 struct ocfs2_xattr_header *xh = loc->xl_header;
1924 struct ocfs2_xattr_entry *entry = loc->xl_entry;
1925
Joel Becker11179f22009-08-14 16:07:44 -07001926 ocfs2_xa_wipe_namevalue(loc);
Joel Beckerbde1e542009-08-14 16:58:38 -07001927 loc->xl_entry = NULL;
1928
1929 le16_add_cpu(&xh->xh_count, -1);
1930 count = le16_to_cpu(xh->xh_count);
1931
1932 /*
1933 * Only zero out the entry if there are more remaining. This is
1934 * important for an empty bucket, as it keeps track of the
1935 * bucket's hash value. It doesn't hurt empty block storage.
1936 */
1937 if (count) {
1938 index = ((char *)entry - (char *)&xh->xh_entries) /
1939 sizeof(struct ocfs2_xattr_entry);
1940 memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1],
1941 (count - index) * sizeof(struct ocfs2_xattr_entry));
1942 memset(&xh->xh_entries[count], 0,
1943 sizeof(struct ocfs2_xattr_entry));
1944 }
Joel Becker11179f22009-08-14 16:07:44 -07001945}
1946
Joel Becker399ff3a72009-09-01 18:38:27 -07001947/*
1948 * If we have a problem adjusting the size of an external value during
1949 * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr
1950 * in an intermediate state. For example, the value may be partially
1951 * truncated.
1952 *
1953 * If the value tree hasn't changed, the extend/truncate went nowhere.
1954 * We have nothing to do. The caller can treat it as a straight error.
1955 *
1956 * If the value tree got partially truncated, we now have a corrupted
1957 * extended attribute. We're going to wipe its entry and leak the
1958 * clusters. Better to leak some storage than leave a corrupt entry.
1959 *
1960 * If the value tree grew, it obviously didn't grow enough for the
1961 * new entry. We're not going to try and reclaim those clusters either.
1962 * If there was already an external value there (orig_clusters != 0),
1963 * the new clusters are attached safely and we can just leave the old
1964 * value in place. If there was no external value there, we remove
1965 * the entry.
1966 *
1967 * This way, the xattr block we store in the journal will be consistent.
1968 * If the size change broke because of the journal, no changes will hit
1969 * disk anyway.
1970 */
1971static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc,
1972 const char *what,
1973 unsigned int orig_clusters)
1974{
1975 unsigned int new_clusters = ocfs2_xa_value_clusters(loc);
1976 char *nameval_buf = ocfs2_xa_offset_pointer(loc,
1977 le16_to_cpu(loc->xl_entry->xe_name_offset));
1978
1979 if (new_clusters < orig_clusters) {
1980 mlog(ML_ERROR,
1981 "Partial truncate while %s xattr %.*s. Leaking "
1982 "%u clusters and removing the entry\n",
1983 what, loc->xl_entry->xe_name_len, nameval_buf,
1984 orig_clusters - new_clusters);
1985 ocfs2_xa_remove_entry(loc);
1986 } else if (!orig_clusters) {
1987 mlog(ML_ERROR,
1988 "Unable to allocate an external value for xattr "
1989 "%.*s safely. Leaking %u clusters and removing the "
1990 "entry\n",
1991 loc->xl_entry->xe_name_len, nameval_buf,
1992 new_clusters - orig_clusters);
1993 ocfs2_xa_remove_entry(loc);
1994 } else if (new_clusters > orig_clusters)
1995 mlog(ML_ERROR,
1996 "Unable to grow xattr %.*s safely. %u new clusters "
1997 "have been added, but the value will not be "
1998 "modified\n",
1999 loc->xl_entry->xe_name_len, nameval_buf,
2000 new_clusters - orig_clusters);
2001}
2002
Joel Becker73857ee2009-08-18 20:26:41 -07002003static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc,
2004 struct ocfs2_xattr_set_ctxt *ctxt)
2005{
2006 int rc = 0;
Joel Becker399ff3a72009-09-01 18:38:27 -07002007 unsigned int orig_clusters;
Joel Becker73857ee2009-08-18 20:26:41 -07002008
2009 if (!ocfs2_xattr_is_local(loc->xl_entry)) {
Joel Becker399ff3a72009-09-01 18:38:27 -07002010 orig_clusters = ocfs2_xa_value_clusters(loc);
Joel Becker73857ee2009-08-18 20:26:41 -07002011 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
2012 if (rc) {
2013 mlog_errno(rc);
Joel Becker399ff3a72009-09-01 18:38:27 -07002014 /*
2015 * Since this is remove, we can return 0 if
2016 * ocfs2_xa_cleanup_value_truncate() is going to
2017 * wipe the entry anyway. So we check the
2018 * cluster count as well.
2019 */
2020 if (orig_clusters != ocfs2_xa_value_clusters(loc))
2021 rc = 0;
2022 ocfs2_xa_cleanup_value_truncate(loc, "removing",
2023 orig_clusters);
2024 if (rc)
2025 goto out;
Joel Becker73857ee2009-08-18 20:26:41 -07002026 }
2027 }
2028
2029 ocfs2_xa_remove_entry(loc);
2030
2031out:
2032 return rc;
2033}
2034
2035static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc)
2036{
2037 int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
2038 char *nameval_buf;
2039
2040 nameval_buf = ocfs2_xa_offset_pointer(loc,
2041 le16_to_cpu(loc->xl_entry->xe_name_offset));
2042 memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE);
2043}
2044
2045/*
2046 * Take an existing entry and make it ready for the new value. This
2047 * won't allocate space, but it may free space. It should be ready for
2048 * ocfs2_xa_prepare_entry() to finish the work.
2049 */
2050static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc,
2051 struct ocfs2_xattr_info *xi,
2052 struct ocfs2_xattr_set_ctxt *ctxt)
2053{
2054 int rc = 0;
2055 int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
Joel Becker399ff3a72009-09-01 18:38:27 -07002056 unsigned int orig_clusters;
Joel Becker73857ee2009-08-18 20:26:41 -07002057 char *nameval_buf;
2058 int xe_local = ocfs2_xattr_is_local(loc->xl_entry);
2059 int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE;
2060
2061 BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) !=
2062 name_size);
2063
2064 nameval_buf = ocfs2_xa_offset_pointer(loc,
2065 le16_to_cpu(loc->xl_entry->xe_name_offset));
2066 if (xe_local) {
2067 memset(nameval_buf + name_size, 0,
2068 namevalue_size_xe(loc->xl_entry) - name_size);
2069 if (!xi_local)
2070 ocfs2_xa_install_value_root(loc);
2071 } else {
Joel Becker399ff3a72009-09-01 18:38:27 -07002072 orig_clusters = ocfs2_xa_value_clusters(loc);
Joel Becker73857ee2009-08-18 20:26:41 -07002073 if (xi_local) {
2074 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
Joel Becker399ff3a72009-09-01 18:38:27 -07002075 if (rc < 0)
Joel Becker73857ee2009-08-18 20:26:41 -07002076 mlog_errno(rc);
Joel Becker399ff3a72009-09-01 18:38:27 -07002077 else
2078 memset(nameval_buf + name_size, 0,
2079 namevalue_size_xe(loc->xl_entry) -
2080 name_size);
Joel Becker73857ee2009-08-18 20:26:41 -07002081 } else if (le64_to_cpu(loc->xl_entry->xe_value_size) >
2082 xi->xi_value_len) {
2083 rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len,
2084 ctxt);
Joel Becker399ff3a72009-09-01 18:38:27 -07002085 if (rc < 0)
Joel Becker73857ee2009-08-18 20:26:41 -07002086 mlog_errno(rc);
Joel Becker399ff3a72009-09-01 18:38:27 -07002087 }
2088
2089 if (rc) {
2090 ocfs2_xa_cleanup_value_truncate(loc, "reusing",
2091 orig_clusters);
2092 goto out;
Joel Becker73857ee2009-08-18 20:26:41 -07002093 }
2094 }
2095
2096 loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
2097 ocfs2_xattr_set_local(loc->xl_entry, xi_local);
2098
2099out:
2100 return rc;
2101}
2102
Joel Becker69a3e532009-08-17 12:24:39 -07002103/*
2104 * Prepares loc->xl_entry to receive the new xattr. This includes
2105 * properly setting up the name+value pair region. If loc->xl_entry
2106 * already exists, it will take care of modifying it appropriately.
Joel Becker69a3e532009-08-17 12:24:39 -07002107 *
2108 * Note that this modifies the data. You did journal_access already,
2109 * right?
2110 */
2111static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc,
2112 struct ocfs2_xattr_info *xi,
Joel Becker73857ee2009-08-18 20:26:41 -07002113 u32 name_hash,
2114 struct ocfs2_xattr_set_ctxt *ctxt)
Joel Becker69a3e532009-08-17 12:24:39 -07002115{
2116 int rc = 0;
Joel Becker399ff3a72009-09-01 18:38:27 -07002117 unsigned int orig_clusters;
2118 __le64 orig_value_size = 0;
Joel Becker69a3e532009-08-17 12:24:39 -07002119
Joel Becker69a3e532009-08-17 12:24:39 -07002120 rc = ocfs2_xa_check_space(loc, xi);
2121 if (rc)
2122 goto out;
2123
Jia-Ju Bai56e94ea2019-10-06 17:57:50 -07002124 if (!loc->xl_entry) {
2125 rc = -EINVAL;
2126 goto out;
2127 }
Joel Becker69a3e532009-08-17 12:24:39 -07002128
Jia-Ju Bai56e94ea2019-10-06 17:57:50 -07002129 if (ocfs2_xa_can_reuse_entry(loc, xi)) {
2130 orig_value_size = loc->xl_entry->xe_value_size;
2131 rc = ocfs2_xa_reuse_entry(loc, xi, ctxt);
2132 if (rc)
2133 goto out;
2134 goto alloc_value;
2135 }
2136
2137 if (!ocfs2_xattr_is_local(loc->xl_entry)) {
2138 orig_clusters = ocfs2_xa_value_clusters(loc);
2139 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
2140 if (rc) {
2141 mlog_errno(rc);
2142 ocfs2_xa_cleanup_value_truncate(loc,
2143 "overwriting",
2144 orig_clusters);
2145 goto out;
Joel Becker73857ee2009-08-18 20:26:41 -07002146 }
Jia-Ju Bai56e94ea2019-10-06 17:57:50 -07002147 }
2148 ocfs2_xa_wipe_namevalue(loc);
Joel Becker69a3e532009-08-17 12:24:39 -07002149
2150 /*
2151 * If we get here, we have a blank entry. Fill it. We grow our
2152 * name+value pair back from the end.
2153 */
2154 ocfs2_xa_add_namevalue(loc, xi);
Joel Becker73857ee2009-08-18 20:26:41 -07002155 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
2156 ocfs2_xa_install_value_root(loc);
2157
2158alloc_value:
2159 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
Joel Becker399ff3a72009-09-01 18:38:27 -07002160 orig_clusters = ocfs2_xa_value_clusters(loc);
Joel Becker73857ee2009-08-18 20:26:41 -07002161 rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt);
Joel Becker399ff3a72009-09-01 18:38:27 -07002162 if (rc < 0) {
Tao Ma5f5261a2010-05-13 22:49:05 +08002163 ctxt->set_abort = 1;
Joel Becker399ff3a72009-09-01 18:38:27 -07002164 ocfs2_xa_cleanup_value_truncate(loc, "growing",
2165 orig_clusters);
Tao Mad5a7df02010-05-10 18:09:47 +08002166 /*
2167 * If we were growing an existing value,
2168 * ocfs2_xa_cleanup_value_truncate() won't remove
2169 * the entry. We need to restore the original value
2170 * size.
2171 */
2172 if (loc->xl_entry) {
2173 BUG_ON(!orig_value_size);
2174 loc->xl_entry->xe_value_size = orig_value_size;
2175 }
Joel Becker73857ee2009-08-18 20:26:41 -07002176 mlog_errno(rc);
Joel Becker399ff3a72009-09-01 18:38:27 -07002177 }
Joel Becker73857ee2009-08-18 20:26:41 -07002178 }
Joel Becker69a3e532009-08-17 12:24:39 -07002179
2180out:
2181 return rc;
2182}
2183
2184/*
Joel Becker73857ee2009-08-18 20:26:41 -07002185 * Store the value portion of the name+value pair. This will skip
2186 * values that are stored externally. Their tree roots were set up
2187 * by ocfs2_xa_prepare_entry().
Joel Becker69a3e532009-08-17 12:24:39 -07002188 */
Joel Becker73857ee2009-08-18 20:26:41 -07002189static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc,
2190 struct ocfs2_xattr_info *xi,
2191 struct ocfs2_xattr_set_ctxt *ctxt)
Joel Becker69a3e532009-08-17 12:24:39 -07002192{
Joel Becker73857ee2009-08-18 20:26:41 -07002193 int rc = 0;
Joel Becker69a3e532009-08-17 12:24:39 -07002194 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
2195 int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
Joel Becker69a3e532009-08-17 12:24:39 -07002196 char *nameval_buf;
Joel Becker73857ee2009-08-18 20:26:41 -07002197 struct ocfs2_xattr_value_buf vb;
Joel Becker69a3e532009-08-17 12:24:39 -07002198
Joel Becker69a3e532009-08-17 12:24:39 -07002199 nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
Joel Becker73857ee2009-08-18 20:26:41 -07002200 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
2201 ocfs2_xa_fill_value_buf(loc, &vb);
2202 rc = __ocfs2_xattr_set_value_outside(loc->xl_inode,
2203 ctxt->handle, &vb,
2204 xi->xi_value,
2205 xi->xi_value_len);
2206 } else
2207 memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len);
2208
Joel Becker73857ee2009-08-18 20:26:41 -07002209 return rc;
Joel Becker69a3e532009-08-17 12:24:39 -07002210}
2211
Joel Beckerbca5e9b2009-08-18 20:40:14 -07002212static int ocfs2_xa_set(struct ocfs2_xa_loc *loc,
2213 struct ocfs2_xattr_info *xi,
2214 struct ocfs2_xattr_set_ctxt *ctxt)
2215{
2216 int ret;
2217 u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name,
2218 xi->xi_name_len);
2219
2220 ret = ocfs2_xa_journal_access(ctxt->handle, loc,
2221 OCFS2_JOURNAL_ACCESS_WRITE);
2222 if (ret) {
2223 mlog_errno(ret);
2224 goto out;
2225 }
2226
Joel Becker399ff3a72009-09-01 18:38:27 -07002227 /*
2228 * From here on out, everything is going to modify the buffer a
2229 * little. Errors are going to leave the xattr header in a
2230 * sane state. Thus, even with errors we dirty the sucker.
2231 */
2232
Joel Beckerbca5e9b2009-08-18 20:40:14 -07002233 /* Don't worry, we are never called with !xi_value and !xl_entry */
2234 if (!xi->xi_value) {
2235 ret = ocfs2_xa_remove(loc, ctxt);
Joel Becker399ff3a72009-09-01 18:38:27 -07002236 goto out_dirty;
Joel Beckerbca5e9b2009-08-18 20:40:14 -07002237 }
2238
2239 ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt);
2240 if (ret) {
2241 if (ret != -ENOSPC)
2242 mlog_errno(ret);
Joel Becker399ff3a72009-09-01 18:38:27 -07002243 goto out_dirty;
Joel Beckerbca5e9b2009-08-18 20:40:14 -07002244 }
2245
2246 ret = ocfs2_xa_store_value(loc, xi, ctxt);
Joel Becker399ff3a72009-09-01 18:38:27 -07002247 if (ret)
Joel Beckerbca5e9b2009-08-18 20:40:14 -07002248 mlog_errno(ret);
Joel Beckerbca5e9b2009-08-18 20:40:14 -07002249
Joel Becker399ff3a72009-09-01 18:38:27 -07002250out_dirty:
Joel Beckerbca5e9b2009-08-18 20:40:14 -07002251 ocfs2_xa_journal_dirty(ctxt->handle, loc);
2252
2253out:
2254 return ret;
2255}
2256
Joel Becker11179f22009-08-14 16:07:44 -07002257static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc,
2258 struct inode *inode,
2259 struct buffer_head *bh,
2260 struct ocfs2_xattr_entry *entry)
2261{
2262 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2263
Joel Becker139ffac2009-08-19 11:09:17 -07002264 BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL));
2265
Joel Beckercf2bc802009-08-18 13:52:38 -07002266 loc->xl_inode = inode;
Joel Becker11179f22009-08-14 16:07:44 -07002267 loc->xl_ops = &ocfs2_xa_block_loc_ops;
2268 loc->xl_storage = bh;
2269 loc->xl_entry = entry;
Joel Becker139ffac2009-08-19 11:09:17 -07002270 loc->xl_size = le16_to_cpu(di->i_xattr_inline_size);
Joel Becker11179f22009-08-14 16:07:44 -07002271 loc->xl_header =
2272 (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size -
2273 loc->xl_size);
2274}
2275
2276static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc,
Joel Beckercf2bc802009-08-18 13:52:38 -07002277 struct inode *inode,
Joel Becker11179f22009-08-14 16:07:44 -07002278 struct buffer_head *bh,
2279 struct ocfs2_xattr_entry *entry)
2280{
2281 struct ocfs2_xattr_block *xb =
2282 (struct ocfs2_xattr_block *)bh->b_data;
2283
2284 BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED);
2285
Joel Beckercf2bc802009-08-18 13:52:38 -07002286 loc->xl_inode = inode;
Joel Becker11179f22009-08-14 16:07:44 -07002287 loc->xl_ops = &ocfs2_xa_block_loc_ops;
2288 loc->xl_storage = bh;
2289 loc->xl_header = &(xb->xb_attrs.xb_header);
2290 loc->xl_entry = entry;
2291 loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block,
2292 xb_attrs.xb_header);
2293}
2294
2295static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc,
2296 struct ocfs2_xattr_bucket *bucket,
2297 struct ocfs2_xattr_entry *entry)
2298{
Joel Beckercf2bc802009-08-18 13:52:38 -07002299 loc->xl_inode = bucket->bu_inode;
Joel Becker11179f22009-08-14 16:07:44 -07002300 loc->xl_ops = &ocfs2_xa_bucket_loc_ops;
2301 loc->xl_storage = bucket;
2302 loc->xl_header = bucket_xh(bucket);
2303 loc->xl_entry = entry;
2304 loc->xl_size = OCFS2_XATTR_BUCKET_SIZE;
2305}
2306
Tao Mace9c5a52009-08-18 11:43:59 +08002307/*
2308 * In xattr remove, if it is stored outside and refcounted, we may have
2309 * the chance to split the refcount tree. So need the allocators.
2310 */
2311static int ocfs2_lock_xattr_remove_allocators(struct inode *inode,
2312 struct ocfs2_xattr_value_root *xv,
2313 struct ocfs2_caching_info *ref_ci,
2314 struct buffer_head *ref_root_bh,
2315 struct ocfs2_alloc_context **meta_ac,
2316 int *ref_credits)
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002317{
Tao Mace9c5a52009-08-18 11:43:59 +08002318 int ret, meta_add = 0;
2319 u32 p_cluster, num_clusters;
2320 unsigned int ext_flags;
Tao Ma78f30c32008-11-12 08:27:00 +08002321
Tao Mace9c5a52009-08-18 11:43:59 +08002322 *ref_credits = 0;
2323 ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster,
2324 &num_clusters,
2325 &xv->xr_list,
2326 &ext_flags);
2327 if (ret) {
Tao Ma85db90e2008-11-12 08:27:01 +08002328 mlog_errno(ret);
2329 goto out;
2330 }
2331
Tao Mace9c5a52009-08-18 11:43:59 +08002332 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
2333 goto out;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002334
Tao Mace9c5a52009-08-18 11:43:59 +08002335 ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci,
2336 ref_root_bh, xv,
2337 &meta_add, ref_credits);
2338 if (ret) {
2339 mlog_errno(ret);
2340 goto out;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002341 }
2342
Tao Mace9c5a52009-08-18 11:43:59 +08002343 ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb),
2344 meta_add, meta_ac);
2345 if (ret)
2346 mlog_errno(ret);
2347
Tao Ma85db90e2008-11-12 08:27:01 +08002348out:
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002349 return ret;
2350}
2351
Tao Mace9c5a52009-08-18 11:43:59 +08002352static int ocfs2_remove_value_outside(struct inode*inode,
2353 struct ocfs2_xattr_value_buf *vb,
2354 struct ocfs2_xattr_header *header,
2355 struct ocfs2_caching_info *ref_ci,
2356 struct buffer_head *ref_root_bh)
2357{
2358 int ret = 0, i, ref_credits;
2359 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2360 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
2361 void *val;
2362
2363 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
2364
2365 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
2366 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
2367
2368 if (ocfs2_xattr_is_local(entry))
2369 continue;
2370
2371 val = (void *)header +
2372 le16_to_cpu(entry->xe_name_offset);
2373 vb->vb_xv = (struct ocfs2_xattr_value_root *)
2374 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
2375
2376 ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv,
2377 ref_ci, ref_root_bh,
2378 &ctxt.meta_ac,
2379 &ref_credits);
2380
2381 ctxt.handle = ocfs2_start_trans(osb, ref_credits +
2382 ocfs2_remove_extent_credits(osb->sb));
2383 if (IS_ERR(ctxt.handle)) {
2384 ret = PTR_ERR(ctxt.handle);
2385 mlog_errno(ret);
2386 break;
2387 }
2388
2389 ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt);
Tao Mace9c5a52009-08-18 11:43:59 +08002390
2391 ocfs2_commit_trans(osb, ctxt.handle);
2392 if (ctxt.meta_ac) {
2393 ocfs2_free_alloc_context(ctxt.meta_ac);
2394 ctxt.meta_ac = NULL;
2395 }
Wengang Wangb8a0ae52011-10-12 15:22:15 +08002396
2397 if (ret < 0) {
2398 mlog_errno(ret);
2399 break;
2400 }
2401
Tao Mace9c5a52009-08-18 11:43:59 +08002402 }
2403
2404 if (ctxt.meta_ac)
2405 ocfs2_free_alloc_context(ctxt.meta_ac);
2406 ocfs2_schedule_truncate_log_flush(osb, 1);
2407 ocfs2_run_deallocs(osb, &ctxt.dealloc);
2408 return ret;
2409}
2410
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002411static int ocfs2_xattr_ibody_remove(struct inode *inode,
Tao Mace9c5a52009-08-18 11:43:59 +08002412 struct buffer_head *di_bh,
2413 struct ocfs2_caching_info *ref_ci,
2414 struct buffer_head *ref_root_bh)
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002415{
2416
2417 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2418 struct ocfs2_xattr_header *header;
2419 int ret;
Joel Becker43119012008-12-09 16:24:43 -08002420 struct ocfs2_xattr_value_buf vb = {
2421 .vb_bh = di_bh,
2422 .vb_access = ocfs2_journal_access_di,
2423 };
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002424
2425 header = (struct ocfs2_xattr_header *)
2426 ((void *)di + inode->i_sb->s_blocksize -
2427 le16_to_cpu(di->i_xattr_inline_size));
2428
Tao Mace9c5a52009-08-18 11:43:59 +08002429 ret = ocfs2_remove_value_outside(inode, &vb, header,
2430 ref_ci, ref_root_bh);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002431
2432 return ret;
2433}
2434
Tao Mace9c5a52009-08-18 11:43:59 +08002435struct ocfs2_rm_xattr_bucket_para {
2436 struct ocfs2_caching_info *ref_ci;
2437 struct buffer_head *ref_root_bh;
2438};
2439
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002440static int ocfs2_xattr_block_remove(struct inode *inode,
Tao Mace9c5a52009-08-18 11:43:59 +08002441 struct buffer_head *blk_bh,
2442 struct ocfs2_caching_info *ref_ci,
2443 struct buffer_head *ref_root_bh)
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002444{
2445 struct ocfs2_xattr_block *xb;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002446 int ret = 0;
Joel Becker43119012008-12-09 16:24:43 -08002447 struct ocfs2_xattr_value_buf vb = {
2448 .vb_bh = blk_bh,
2449 .vb_access = ocfs2_journal_access_xb,
2450 };
Tao Mace9c5a52009-08-18 11:43:59 +08002451 struct ocfs2_rm_xattr_bucket_para args = {
2452 .ref_ci = ref_ci,
2453 .ref_root_bh = ref_root_bh,
2454 };
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002455
2456 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
Tao Maa3944252008-08-18 17:38:54 +08002457 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2458 struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header);
Tao Mace9c5a52009-08-18 11:43:59 +08002459 ret = ocfs2_remove_value_outside(inode, &vb, header,
2460 ref_ci, ref_root_bh);
Tao Maa3944252008-08-18 17:38:54 +08002461 } else
Tao Ma47bca492009-08-18 11:43:42 +08002462 ret = ocfs2_iterate_xattr_index_block(inode,
2463 blk_bh,
2464 ocfs2_rm_xattr_cluster,
Tao Mace9c5a52009-08-18 11:43:59 +08002465 &args);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002466
2467 return ret;
2468}
2469
Tao Ma08413892008-08-29 09:00:19 +08002470static int ocfs2_xattr_free_block(struct inode *inode,
Tao Mace9c5a52009-08-18 11:43:59 +08002471 u64 block,
2472 struct ocfs2_caching_info *ref_ci,
2473 struct buffer_head *ref_root_bh)
Tao Ma08413892008-08-29 09:00:19 +08002474{
2475 struct inode *xb_alloc_inode;
2476 struct buffer_head *xb_alloc_bh = NULL;
2477 struct buffer_head *blk_bh = NULL;
2478 struct ocfs2_xattr_block *xb;
2479 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2480 handle_t *handle;
2481 int ret = 0;
2482 u64 blk, bg_blkno;
2483 u16 bit;
2484
Joel Becker4ae1d692008-11-13 14:49:18 -08002485 ret = ocfs2_read_xattr_block(inode, block, &blk_bh);
Tao Ma08413892008-08-29 09:00:19 +08002486 if (ret < 0) {
2487 mlog_errno(ret);
2488 goto out;
2489 }
2490
Tao Mace9c5a52009-08-18 11:43:59 +08002491 ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh);
Tao Ma08413892008-08-29 09:00:19 +08002492 if (ret < 0) {
2493 mlog_errno(ret);
2494 goto out;
2495 }
2496
Joel Becker4ae1d692008-11-13 14:49:18 -08002497 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
Tao Ma08413892008-08-29 09:00:19 +08002498 blk = le64_to_cpu(xb->xb_blkno);
2499 bit = le16_to_cpu(xb->xb_suballoc_bit);
Tao Ma74380c42010-03-22 14:20:18 +08002500 if (xb->xb_suballoc_loc)
2501 bg_blkno = le64_to_cpu(xb->xb_suballoc_loc);
2502 else
2503 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
Tao Ma08413892008-08-29 09:00:19 +08002504
2505 xb_alloc_inode = ocfs2_get_system_file_inode(osb,
2506 EXTENT_ALLOC_SYSTEM_INODE,
2507 le16_to_cpu(xb->xb_suballoc_slot));
2508 if (!xb_alloc_inode) {
2509 ret = -ENOMEM;
2510 mlog_errno(ret);
2511 goto out;
2512 }
Al Viro59551022016-01-22 15:40:57 -05002513 inode_lock(xb_alloc_inode);
Tao Ma08413892008-08-29 09:00:19 +08002514
2515 ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
2516 if (ret < 0) {
2517 mlog_errno(ret);
2518 goto out_mutex;
2519 }
2520
2521 handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
2522 if (IS_ERR(handle)) {
2523 ret = PTR_ERR(handle);
2524 mlog_errno(ret);
2525 goto out_unlock;
2526 }
2527
2528 ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
2529 bit, bg_blkno, 1);
2530 if (ret < 0)
2531 mlog_errno(ret);
2532
2533 ocfs2_commit_trans(osb, handle);
2534out_unlock:
2535 ocfs2_inode_unlock(xb_alloc_inode, 1);
2536 brelse(xb_alloc_bh);
2537out_mutex:
Al Viro59551022016-01-22 15:40:57 -05002538 inode_unlock(xb_alloc_inode);
Tao Ma08413892008-08-29 09:00:19 +08002539 iput(xb_alloc_inode);
2540out:
2541 brelse(blk_bh);
2542 return ret;
2543}
2544
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002545/*
2546 * ocfs2_xattr_remove()
2547 *
2548 * Free extended attribute resources associated with this inode.
2549 */
2550int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
2551{
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002552 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2553 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
Tao Mace9c5a52009-08-18 11:43:59 +08002554 struct ocfs2_refcount_tree *ref_tree = NULL;
2555 struct buffer_head *ref_root_bh = NULL;
2556 struct ocfs2_caching_info *ref_ci = NULL;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002557 handle_t *handle;
2558 int ret;
2559
Tiger Yang8154da32008-08-18 17:11:46 +08002560 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2561 return 0;
2562
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002563 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
2564 return 0;
2565
Darrick J. Wong84e40082016-11-09 14:13:09 -08002566 if (ocfs2_is_refcount_inode(inode)) {
Tao Mace9c5a52009-08-18 11:43:59 +08002567 ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb),
2568 le64_to_cpu(di->i_refcount_loc),
2569 1, &ref_tree, &ref_root_bh);
2570 if (ret) {
2571 mlog_errno(ret);
2572 goto out;
2573 }
2574 ref_ci = &ref_tree->rf_ci;
2575
2576 }
2577
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002578 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
Tao Mace9c5a52009-08-18 11:43:59 +08002579 ret = ocfs2_xattr_ibody_remove(inode, di_bh,
2580 ref_ci, ref_root_bh);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002581 if (ret < 0) {
2582 mlog_errno(ret);
2583 goto out;
2584 }
2585 }
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002586
Tao Ma08413892008-08-29 09:00:19 +08002587 if (di->i_xattr_loc) {
2588 ret = ocfs2_xattr_free_block(inode,
Tao Mace9c5a52009-08-18 11:43:59 +08002589 le64_to_cpu(di->i_xattr_loc),
2590 ref_ci, ref_root_bh);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002591 if (ret < 0) {
2592 mlog_errno(ret);
2593 goto out;
2594 }
2595 }
2596
2597 handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
2598 OCFS2_INODE_UPDATE_CREDITS);
2599 if (IS_ERR(handle)) {
2600 ret = PTR_ERR(handle);
2601 mlog_errno(ret);
2602 goto out;
2603 }
Joel Becker0cf2f762009-02-12 16:41:25 -08002604 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
Joel Becker84008972008-12-09 16:11:49 -08002605 OCFS2_JOURNAL_ACCESS_WRITE);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002606 if (ret) {
2607 mlog_errno(ret);
2608 goto out_commit;
2609 }
2610
Tao Ma08413892008-08-29 09:00:19 +08002611 di->i_xattr_loc = 0;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002612
2613 spin_lock(&oi->ip_lock);
2614 oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
2615 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
2616 spin_unlock(&oi->ip_lock);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -07002617 ocfs2_update_inode_fsync_trans(handle, inode, 0);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002618
Joel Beckerec20cec2010-03-19 14:13:52 -07002619 ocfs2_journal_dirty(handle, di_bh);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002620out_commit:
2621 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
2622out:
Tao Mace9c5a52009-08-18 11:43:59 +08002623 if (ref_tree)
2624 ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1);
2625 brelse(ref_root_bh);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002626 return ret;
2627}
2628
2629static int ocfs2_xattr_has_space_inline(struct inode *inode,
2630 struct ocfs2_dinode *di)
2631{
2632 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2633 unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
2634 int free;
2635
2636 if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
2637 return 0;
2638
2639 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2640 struct ocfs2_inline_data *idata = &di->id2.i_data;
2641 free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
2642 } else if (ocfs2_inode_is_fast_symlink(inode)) {
2643 free = ocfs2_fast_symlink_chars(inode->i_sb) -
2644 le64_to_cpu(di->i_size);
2645 } else {
2646 struct ocfs2_extent_list *el = &di->id2.i_list;
2647 free = (le16_to_cpu(el->l_count) -
2648 le16_to_cpu(el->l_next_free_rec)) *
2649 sizeof(struct ocfs2_extent_rec);
2650 }
2651 if (free >= xattrsize)
2652 return 1;
2653
2654 return 0;
2655}
2656
2657/*
2658 * ocfs2_xattr_ibody_find()
2659 *
2660 * Find extended attribute in inode block and
2661 * fill search info into struct ocfs2_xattr_search.
2662 */
2663static int ocfs2_xattr_ibody_find(struct inode *inode,
2664 int name_index,
2665 const char *name,
2666 struct ocfs2_xattr_search *xs)
2667{
2668 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2669 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2670 int ret;
2671 int has_space = 0;
2672
2673 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2674 return 0;
2675
2676 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2677 down_read(&oi->ip_alloc_sem);
2678 has_space = ocfs2_xattr_has_space_inline(inode, di);
2679 up_read(&oi->ip_alloc_sem);
2680 if (!has_space)
2681 return 0;
2682 }
2683
2684 xs->xattr_bh = xs->inode_bh;
2685 xs->end = (void *)di + inode->i_sb->s_blocksize;
2686 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
2687 xs->header = (struct ocfs2_xattr_header *)
2688 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
2689 else
2690 xs->header = (struct ocfs2_xattr_header *)
2691 (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
2692 xs->base = (void *)xs->header;
2693 xs->here = xs->header->xh_entries;
2694
2695 /* Find the named attribute. */
2696 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
2697 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2698 if (ret && ret != -ENODATA)
2699 return ret;
2700 xs->not_found = ret;
2701 }
2702
2703 return 0;
2704}
2705
Joel Becker139ffac2009-08-19 11:09:17 -07002706static int ocfs2_xattr_ibody_init(struct inode *inode,
2707 struct buffer_head *di_bh,
2708 struct ocfs2_xattr_set_ctxt *ctxt)
2709{
2710 int ret;
2711 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2712 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2713 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2714 unsigned int xattrsize = osb->s_xattr_inline_size;
2715
2716 if (!ocfs2_xattr_has_space_inline(inode, di)) {
2717 ret = -ENOSPC;
2718 goto out;
2719 }
2720
2721 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh,
2722 OCFS2_JOURNAL_ACCESS_WRITE);
2723 if (ret) {
2724 mlog_errno(ret);
2725 goto out;
2726 }
2727
2728 /*
2729 * Adjust extent record count or inline data size
2730 * to reserve space for extended attribute.
2731 */
2732 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2733 struct ocfs2_inline_data *idata = &di->id2.i_data;
2734 le16_add_cpu(&idata->id_count, -xattrsize);
2735 } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
2736 struct ocfs2_extent_list *el = &di->id2.i_list;
2737 le16_add_cpu(&el->l_count, -(xattrsize /
2738 sizeof(struct ocfs2_extent_rec)));
2739 }
2740 di->i_xattr_inline_size = cpu_to_le16(xattrsize);
2741
2742 spin_lock(&oi->ip_lock);
2743 oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL;
2744 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
2745 spin_unlock(&oi->ip_lock);
2746
Joel Beckerec20cec2010-03-19 14:13:52 -07002747 ocfs2_journal_dirty(ctxt->handle, di_bh);
Joel Becker139ffac2009-08-19 11:09:17 -07002748
2749out:
2750 return ret;
2751}
2752
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002753/*
2754 * ocfs2_xattr_ibody_set()
2755 *
2756 * Set, replace or remove an extended attribute into inode block.
2757 *
2758 */
2759static int ocfs2_xattr_ibody_set(struct inode *inode,
2760 struct ocfs2_xattr_info *xi,
Tao Ma78f30c32008-11-12 08:27:00 +08002761 struct ocfs2_xattr_search *xs,
2762 struct ocfs2_xattr_set_ctxt *ctxt)
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002763{
Joel Becker139ffac2009-08-19 11:09:17 -07002764 int ret;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002765 struct ocfs2_inode_info *oi = OCFS2_I(inode);
Joel Becker139ffac2009-08-19 11:09:17 -07002766 struct ocfs2_xa_loc loc;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002767
2768 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2769 return -ENOSPC;
2770
2771 down_write(&oi->ip_alloc_sem);
2772 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
Joel Becker139ffac2009-08-19 11:09:17 -07002773 ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt);
2774 if (ret) {
2775 if (ret != -ENOSPC)
2776 mlog_errno(ret);
2777 goto out;
2778 }
2779 }
2780
2781 ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh,
2782 xs->not_found ? NULL : xs->here);
2783 ret = ocfs2_xa_set(&loc, xi, ctxt);
2784 if (ret) {
2785 if (ret != -ENOSPC)
2786 mlog_errno(ret);
2787 goto out;
2788 }
2789 xs->here = loc.xl_entry;
2790
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002791out:
2792 up_write(&oi->ip_alloc_sem);
2793
2794 return ret;
2795}
2796
2797/*
2798 * ocfs2_xattr_block_find()
2799 *
2800 * Find extended attribute in external block and
2801 * fill search info into struct ocfs2_xattr_search.
2802 */
2803static int ocfs2_xattr_block_find(struct inode *inode,
2804 int name_index,
2805 const char *name,
2806 struct ocfs2_xattr_search *xs)
2807{
2808 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2809 struct buffer_head *blk_bh = NULL;
Tao Ma589dc262008-08-18 17:38:51 +08002810 struct ocfs2_xattr_block *xb;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002811 int ret = 0;
2812
2813 if (!di->i_xattr_loc)
2814 return ret;
2815
Joel Becker4ae1d692008-11-13 14:49:18 -08002816 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
2817 &blk_bh);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002818 if (ret < 0) {
2819 mlog_errno(ret);
2820 return ret;
2821 }
Joel Beckerf6087fb2008-10-20 18:20:43 -07002822
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002823 xs->xattr_bh = blk_bh;
Joel Becker4ae1d692008-11-13 14:49:18 -08002824 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002825
Tao Ma589dc262008-08-18 17:38:51 +08002826 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2827 xs->header = &xb->xb_attrs.xb_header;
2828 xs->base = (void *)xs->header;
2829 xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
2830 xs->here = xs->header->xh_entries;
2831
2832 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2833 } else
2834 ret = ocfs2_xattr_index_block_find(inode, blk_bh,
2835 name_index,
2836 name, xs);
2837
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002838 if (ret && ret != -ENODATA) {
2839 xs->xattr_bh = NULL;
2840 goto cleanup;
2841 }
2842 xs->not_found = ret;
2843 return 0;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002844cleanup:
2845 brelse(blk_bh);
2846
2847 return ret;
2848}
2849
Joel Beckerd3981542009-08-19 02:13:50 -07002850static int ocfs2_create_xattr_block(struct inode *inode,
Tao Ma5aea1f02009-08-18 11:43:24 +08002851 struct buffer_head *inode_bh,
Joel Beckerd3981542009-08-19 02:13:50 -07002852 struct ocfs2_xattr_set_ctxt *ctxt,
2853 int indexed,
2854 struct buffer_head **ret_bh)
Tao Ma5aea1f02009-08-18 11:43:24 +08002855{
2856 int ret;
2857 u16 suballoc_bit_start;
2858 u32 num_got;
Joel Becker2b6cb572010-03-26 10:09:15 +08002859 u64 suballoc_loc, first_blkno;
Tao Ma5aea1f02009-08-18 11:43:24 +08002860 struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data;
Tao Ma5aea1f02009-08-18 11:43:24 +08002861 struct buffer_head *new_bh = NULL;
2862 struct ocfs2_xattr_block *xblk;
2863
Joel Beckerd3981542009-08-19 02:13:50 -07002864 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode),
2865 inode_bh, OCFS2_JOURNAL_ACCESS_CREATE);
Tao Ma5aea1f02009-08-18 11:43:24 +08002866 if (ret < 0) {
2867 mlog_errno(ret);
2868 goto end;
2869 }
2870
Joel Becker1ed9b772010-05-06 13:59:06 +08002871 ret = ocfs2_claim_metadata(ctxt->handle, ctxt->meta_ac, 1,
Joel Becker2b6cb572010-03-26 10:09:15 +08002872 &suballoc_loc, &suballoc_bit_start,
2873 &num_got, &first_blkno);
Tao Ma5aea1f02009-08-18 11:43:24 +08002874 if (ret < 0) {
2875 mlog_errno(ret);
2876 goto end;
2877 }
2878
2879 new_bh = sb_getblk(inode->i_sb, first_blkno);
Rui Xiang58796202013-11-12 15:06:55 -08002880 if (!new_bh) {
2881 ret = -ENOMEM;
2882 mlog_errno(ret);
2883 goto end;
2884 }
2885
Tao Ma5aea1f02009-08-18 11:43:24 +08002886 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh);
2887
Joel Beckerd3981542009-08-19 02:13:50 -07002888 ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode),
Tao Ma5aea1f02009-08-18 11:43:24 +08002889 new_bh,
2890 OCFS2_JOURNAL_ACCESS_CREATE);
2891 if (ret < 0) {
2892 mlog_errno(ret);
2893 goto end;
2894 }
2895
2896 /* Initialize ocfs2_xattr_block */
2897 xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
2898 memset(xblk, 0, inode->i_sb->s_blocksize);
2899 strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
Joel Beckerd3981542009-08-19 02:13:50 -07002900 xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot);
Joel Becker2b6cb572010-03-26 10:09:15 +08002901 xblk->xb_suballoc_loc = cpu_to_le64(suballoc_loc);
Tao Ma5aea1f02009-08-18 11:43:24 +08002902 xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
Joel Becker1ed9b772010-05-06 13:59:06 +08002903 xblk->xb_fs_generation =
2904 cpu_to_le32(OCFS2_SB(inode->i_sb)->fs_generation);
Tao Ma5aea1f02009-08-18 11:43:24 +08002905 xblk->xb_blkno = cpu_to_le64(first_blkno);
Tao Maa7fe7a32009-08-18 11:43:52 +08002906 if (indexed) {
2907 struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root;
2908 xr->xt_clusters = cpu_to_le32(1);
2909 xr->xt_last_eb_blk = 0;
2910 xr->xt_list.l_tree_depth = 0;
2911 xr->xt_list.l_count = cpu_to_le16(
2912 ocfs2_xattr_recs_per_xb(inode->i_sb));
2913 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
2914 xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED);
2915 }
Joel Beckerd3981542009-08-19 02:13:50 -07002916 ocfs2_journal_dirty(ctxt->handle, new_bh);
Tao Maa7fe7a32009-08-18 11:43:52 +08002917
Joel Beckerd3981542009-08-19 02:13:50 -07002918 /* Add it to the inode */
Tao Ma5aea1f02009-08-18 11:43:24 +08002919 di->i_xattr_loc = cpu_to_le64(first_blkno);
Joel Beckerd3981542009-08-19 02:13:50 -07002920
2921 spin_lock(&OCFS2_I(inode)->ip_lock);
2922 OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
2923 di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
2924 spin_unlock(&OCFS2_I(inode)->ip_lock);
2925
2926 ocfs2_journal_dirty(ctxt->handle, inode_bh);
Tao Ma5aea1f02009-08-18 11:43:24 +08002927
2928 *ret_bh = new_bh;
2929 new_bh = NULL;
2930
2931end:
2932 brelse(new_bh);
2933 return ret;
2934}
2935
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002936/*
2937 * ocfs2_xattr_block_set()
2938 *
2939 * Set, replace or remove an extended attribute into external block.
2940 *
2941 */
2942static int ocfs2_xattr_block_set(struct inode *inode,
2943 struct ocfs2_xattr_info *xi,
Tao Ma78f30c32008-11-12 08:27:00 +08002944 struct ocfs2_xattr_search *xs,
2945 struct ocfs2_xattr_set_ctxt *ctxt)
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002946{
2947 struct buffer_head *new_bh = NULL;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002948 struct ocfs2_xattr_block *xblk = NULL;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002949 int ret;
Joel Beckerd3981542009-08-19 02:13:50 -07002950 struct ocfs2_xa_loc loc;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002951
2952 if (!xs->xattr_bh) {
Joel Beckerd3981542009-08-19 02:13:50 -07002953 ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt,
2954 0, &new_bh);
Tao Ma5aea1f02009-08-18 11:43:24 +08002955 if (ret) {
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002956 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08002957 goto end;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002958 }
2959
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002960 xs->xattr_bh = new_bh;
Tao Ma5aea1f02009-08-18 11:43:24 +08002961 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002962 xs->header = &xblk->xb_attrs.xb_header;
2963 xs->base = (void *)xs->header;
2964 xs->end = (void *)xblk + inode->i_sb->s_blocksize;
2965 xs->here = xs->header->xh_entries;
Tao Ma01225592008-08-18 17:38:53 +08002966 } else
2967 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
2968
2969 if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
Joel Beckerd3981542009-08-19 02:13:50 -07002970 ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh,
2971 xs->not_found ? NULL : xs->here);
Tao Ma01225592008-08-18 17:38:53 +08002972
Joel Beckerd3981542009-08-19 02:13:50 -07002973 ret = ocfs2_xa_set(&loc, xi, ctxt);
2974 if (!ret)
2975 xs->here = loc.xl_entry;
Tao Ma5f5261a2010-05-13 22:49:05 +08002976 else if ((ret != -ENOSPC) || ctxt->set_abort)
Tao Ma01225592008-08-18 17:38:53 +08002977 goto end;
Joel Beckerd3981542009-08-19 02:13:50 -07002978 else {
2979 ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
2980 if (ret)
2981 goto end;
2982 }
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002983 }
2984
Joel Beckerd3981542009-08-19 02:13:50 -07002985 if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)
2986 ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
Tao Ma01225592008-08-18 17:38:53 +08002987
2988end:
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002989 return ret;
2990}
2991
Tao Ma78f30c32008-11-12 08:27:00 +08002992/* Check whether the new xattr can be inserted into the inode. */
2993static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
2994 struct ocfs2_xattr_info *xi,
2995 struct ocfs2_xattr_search *xs)
2996{
Tao Ma78f30c32008-11-12 08:27:00 +08002997 struct ocfs2_xattr_entry *last;
2998 int free, i;
2999 size_t min_offs = xs->end - xs->base;
3000
3001 if (!xs->header)
3002 return 0;
3003
3004 last = xs->header->xh_entries;
3005
3006 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
3007 size_t offs = le16_to_cpu(last->xe_name_offset);
3008 if (offs < min_offs)
3009 min_offs = offs;
3010 last += 1;
3011 }
3012
Tiger Yang4442f512009-02-20 11:11:50 +08003013 free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP;
Tao Ma78f30c32008-11-12 08:27:00 +08003014 if (free < 0)
3015 return 0;
3016
3017 BUG_ON(!xs->not_found);
3018
Joel Becker199799a2009-08-14 19:04:15 -07003019 if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi)))
Tao Ma78f30c32008-11-12 08:27:00 +08003020 return 1;
3021
3022 return 0;
3023}
3024
3025static int ocfs2_calc_xattr_set_need(struct inode *inode,
3026 struct ocfs2_dinode *di,
3027 struct ocfs2_xattr_info *xi,
3028 struct ocfs2_xattr_search *xis,
3029 struct ocfs2_xattr_search *xbs,
3030 int *clusters_need,
Tao Ma85db90e2008-11-12 08:27:01 +08003031 int *meta_need,
3032 int *credits_need)
Tao Ma78f30c32008-11-12 08:27:00 +08003033{
3034 int ret = 0, old_in_xb = 0;
Tao Ma85db90e2008-11-12 08:27:01 +08003035 int clusters_add = 0, meta_add = 0, credits = 0;
Tao Ma78f30c32008-11-12 08:27:00 +08003036 struct buffer_head *bh = NULL;
3037 struct ocfs2_xattr_block *xb = NULL;
3038 struct ocfs2_xattr_entry *xe = NULL;
3039 struct ocfs2_xattr_value_root *xv = NULL;
3040 char *base = NULL;
3041 int name_offset, name_len = 0;
3042 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
Joel Becker6b240ff2009-08-14 18:02:52 -07003043 xi->xi_value_len);
Tao Ma78f30c32008-11-12 08:27:00 +08003044 u64 value_size;
3045
Tao Ma71d548a2008-12-05 06:20:54 +08003046 /*
3047 * Calculate the clusters we need to write.
3048 * No matter whether we replace an old one or add a new one,
3049 * we need this for writing.
3050 */
Joel Becker6b240ff2009-08-14 18:02:52 -07003051 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
Tao Ma71d548a2008-12-05 06:20:54 +08003052 credits += new_clusters *
3053 ocfs2_clusters_to_blocks(inode->i_sb, 1);
3054
Tao Ma78f30c32008-11-12 08:27:00 +08003055 if (xis->not_found && xbs->not_found) {
Tao Ma85db90e2008-11-12 08:27:01 +08003056 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3057
Joel Becker6b240ff2009-08-14 18:02:52 -07003058 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
Tao Ma78f30c32008-11-12 08:27:00 +08003059 clusters_add += new_clusters;
Tao Ma85db90e2008-11-12 08:27:01 +08003060 credits += ocfs2_calc_extend_credits(inode->i_sb,
Goldwyn Rodrigues06f9da62013-11-12 15:06:52 -08003061 &def_xv.xv.xr_list);
Tao Ma85db90e2008-11-12 08:27:01 +08003062 }
Tao Ma78f30c32008-11-12 08:27:00 +08003063
3064 goto meta_guess;
3065 }
3066
3067 if (!xis->not_found) {
3068 xe = xis->here;
3069 name_offset = le16_to_cpu(xe->xe_name_offset);
3070 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3071 base = xis->base;
Tao Ma85db90e2008-11-12 08:27:01 +08003072 credits += OCFS2_INODE_UPDATE_CREDITS;
Tao Ma78f30c32008-11-12 08:27:00 +08003073 } else {
Joel Becker970e4932008-11-13 14:49:19 -08003074 int i, block_off = 0;
Tao Ma78f30c32008-11-12 08:27:00 +08003075 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
3076 xe = xbs->here;
3077 name_offset = le16_to_cpu(xe->xe_name_offset);
3078 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3079 i = xbs->here - xbs->header->xh_entries;
3080 old_in_xb = 1;
3081
3082 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
Tao Mafd68a892009-08-18 11:43:21 +08003083 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
Tao Ma78f30c32008-11-12 08:27:00 +08003084 bucket_xh(xbs->bucket),
3085 i, &block_off,
3086 &name_offset);
3087 base = bucket_block(xbs->bucket, block_off);
Tao Ma85db90e2008-11-12 08:27:01 +08003088 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3089 } else {
Tao Ma78f30c32008-11-12 08:27:00 +08003090 base = xbs->base;
Tao Ma85db90e2008-11-12 08:27:01 +08003091 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
3092 }
3093 }
3094
3095 /*
3096 * delete a xattr doesn't need metadata and cluster allocation.
3097 * so just calculate the credits and return.
3098 *
3099 * The credits for removing the value tree will be extended
3100 * by ocfs2_remove_extent itself.
3101 */
Joel Becker6b240ff2009-08-14 18:02:52 -07003102 if (!xi->xi_value) {
Tao Ma85db90e2008-11-12 08:27:01 +08003103 if (!ocfs2_xattr_is_local(xe))
Jan Karaa90714c2008-10-09 19:38:40 +02003104 credits += ocfs2_remove_extent_credits(inode->i_sb);
Tao Ma85db90e2008-11-12 08:27:01 +08003105
3106 goto out;
Tao Ma78f30c32008-11-12 08:27:00 +08003107 }
3108
3109 /* do cluster allocation guess first. */
3110 value_size = le64_to_cpu(xe->xe_value_size);
3111
3112 if (old_in_xb) {
3113 /*
3114 * In xattr set, we always try to set the xe in inode first,
3115 * so if it can be inserted into inode successfully, the old
3116 * one will be removed from the xattr block, and this xattr
3117 * will be inserted into inode as a new xattr in inode.
3118 */
3119 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
3120 clusters_add += new_clusters;
Jan Karaa90714c2008-10-09 19:38:40 +02003121 credits += ocfs2_remove_extent_credits(inode->i_sb) +
Tao Ma85db90e2008-11-12 08:27:01 +08003122 OCFS2_INODE_UPDATE_CREDITS;
3123 if (!ocfs2_xattr_is_local(xe))
3124 credits += ocfs2_calc_extend_credits(
3125 inode->i_sb,
Goldwyn Rodrigues06f9da62013-11-12 15:06:52 -08003126 &def_xv.xv.xr_list);
Tao Ma78f30c32008-11-12 08:27:00 +08003127 goto out;
3128 }
3129 }
3130
Joel Becker6b240ff2009-08-14 18:02:52 -07003131 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
Tao Ma78f30c32008-11-12 08:27:00 +08003132 /* the new values will be stored outside. */
3133 u32 old_clusters = 0;
3134
3135 if (!ocfs2_xattr_is_local(xe)) {
3136 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
3137 value_size);
3138 xv = (struct ocfs2_xattr_value_root *)
3139 (base + name_offset + name_len);
Tao Ma97aff522008-11-19 16:48:41 +08003140 value_size = OCFS2_XATTR_ROOT_SIZE;
Tao Ma78f30c32008-11-12 08:27:00 +08003141 } else
3142 xv = &def_xv.xv;
3143
Tao Ma85db90e2008-11-12 08:27:01 +08003144 if (old_clusters >= new_clusters) {
Jan Karaa90714c2008-10-09 19:38:40 +02003145 credits += ocfs2_remove_extent_credits(inode->i_sb);
Tao Ma78f30c32008-11-12 08:27:00 +08003146 goto out;
Tao Ma85db90e2008-11-12 08:27:01 +08003147 } else {
Tao Ma78f30c32008-11-12 08:27:00 +08003148 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
3149 clusters_add += new_clusters - old_clusters;
Tao Ma85db90e2008-11-12 08:27:01 +08003150 credits += ocfs2_calc_extend_credits(inode->i_sb,
Goldwyn Rodrigues06f9da62013-11-12 15:06:52 -08003151 &xv->xr_list);
Tao Ma97aff522008-11-19 16:48:41 +08003152 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
3153 goto out;
Tao Ma78f30c32008-11-12 08:27:00 +08003154 }
3155 } else {
3156 /*
3157 * Now the new value will be stored inside. So if the new
3158 * value is smaller than the size of value root or the old
3159 * value, we don't need any allocation, otherwise we have
3160 * to guess metadata allocation.
3161 */
Joel Becker6b240ff2009-08-14 18:02:52 -07003162 if ((ocfs2_xattr_is_local(xe) &&
3163 (value_size >= xi->xi_value_len)) ||
Tao Ma78f30c32008-11-12 08:27:00 +08003164 (!ocfs2_xattr_is_local(xe) &&
Joel Becker6b240ff2009-08-14 18:02:52 -07003165 OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len))
Tao Ma78f30c32008-11-12 08:27:00 +08003166 goto out;
3167 }
3168
3169meta_guess:
3170 /* calculate metadata allocation. */
3171 if (di->i_xattr_loc) {
3172 if (!xbs->xattr_bh) {
Joel Becker4ae1d692008-11-13 14:49:18 -08003173 ret = ocfs2_read_xattr_block(inode,
3174 le64_to_cpu(di->i_xattr_loc),
3175 &bh);
Tao Ma78f30c32008-11-12 08:27:00 +08003176 if (ret) {
3177 mlog_errno(ret);
3178 goto out;
3179 }
3180
3181 xb = (struct ocfs2_xattr_block *)bh->b_data;
3182 } else
3183 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
3184
Tao Ma90cb5462008-12-05 06:20:56 +08003185 /*
3186 * If there is already an xattr tree, good, we can calculate
3187 * like other b-trees. Otherwise we may have the chance of
3188 * create a tree, the credit calculation is borrowed from
3189 * ocfs2_calc_extend_credits with root_el = NULL. And the
3190 * new tree will be cluster based, so no meta is needed.
3191 */
Tao Ma78f30c32008-11-12 08:27:00 +08003192 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
3193 struct ocfs2_extent_list *el =
3194 &xb->xb_attrs.xb_root.xt_list;
3195 meta_add += ocfs2_extend_meta_needed(el);
Tao Ma85db90e2008-11-12 08:27:01 +08003196 credits += ocfs2_calc_extend_credits(inode->i_sb,
Goldwyn Rodrigues06f9da62013-11-12 15:06:52 -08003197 el);
Tao Ma90cb5462008-12-05 06:20:56 +08003198 } else
3199 credits += OCFS2_SUBALLOC_ALLOC + 1;
Tao Ma78f30c32008-11-12 08:27:00 +08003200
3201 /*
3202 * This cluster will be used either for new bucket or for
3203 * new xattr block.
3204 * If the cluster size is the same as the bucket size, one
3205 * more is needed since we may need to extend the bucket
3206 * also.
3207 */
3208 clusters_add += 1;
Tao Ma85db90e2008-11-12 08:27:01 +08003209 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
Tao Ma78f30c32008-11-12 08:27:00 +08003210 if (OCFS2_XATTR_BUCKET_SIZE ==
Tao Ma85db90e2008-11-12 08:27:01 +08003211 OCFS2_SB(inode->i_sb)->s_clustersize) {
3212 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
Tao Ma78f30c32008-11-12 08:27:00 +08003213 clusters_add += 1;
Tao Ma85db90e2008-11-12 08:27:01 +08003214 }
3215 } else {
Tao Ma85db90e2008-11-12 08:27:01 +08003216 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
Tariq Saeed3ed2be72014-04-03 14:47:03 -07003217 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
3218 struct ocfs2_extent_list *el = &def_xv.xv.xr_list;
3219 meta_add += ocfs2_extend_meta_needed(el);
3220 credits += ocfs2_calc_extend_credits(inode->i_sb,
3221 el);
3222 } else {
3223 meta_add += 1;
3224 }
Tao Ma85db90e2008-11-12 08:27:01 +08003225 }
Tao Ma78f30c32008-11-12 08:27:00 +08003226out:
3227 if (clusters_need)
3228 *clusters_need = clusters_add;
3229 if (meta_need)
3230 *meta_need = meta_add;
Tao Ma85db90e2008-11-12 08:27:01 +08003231 if (credits_need)
3232 *credits_need = credits;
Tao Ma78f30c32008-11-12 08:27:00 +08003233 brelse(bh);
3234 return ret;
3235}
3236
3237static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
3238 struct ocfs2_dinode *di,
3239 struct ocfs2_xattr_info *xi,
3240 struct ocfs2_xattr_search *xis,
3241 struct ocfs2_xattr_search *xbs,
Tao Ma85db90e2008-11-12 08:27:01 +08003242 struct ocfs2_xattr_set_ctxt *ctxt,
Tao Ma492a8a32009-08-18 11:43:17 +08003243 int extra_meta,
Tao Ma85db90e2008-11-12 08:27:01 +08003244 int *credits)
Tao Ma78f30c32008-11-12 08:27:00 +08003245{
3246 int clusters_add, meta_add, ret;
3247 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3248
3249 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
3250
3251 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
3252
3253 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
Tao Ma85db90e2008-11-12 08:27:01 +08003254 &clusters_add, &meta_add, credits);
Tao Ma78f30c32008-11-12 08:27:00 +08003255 if (ret) {
3256 mlog_errno(ret);
3257 return ret;
3258 }
3259
Tao Ma492a8a32009-08-18 11:43:17 +08003260 meta_add += extra_meta;
Tao Ma402b4182011-02-23 22:01:17 +08003261 trace_ocfs2_init_xattr_set_ctxt(xi->xi_name, meta_add,
3262 clusters_add, *credits);
Tao Ma78f30c32008-11-12 08:27:00 +08003263
3264 if (meta_add) {
3265 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
3266 &ctxt->meta_ac);
3267 if (ret) {
3268 mlog_errno(ret);
3269 goto out;
3270 }
3271 }
3272
3273 if (clusters_add) {
3274 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
3275 if (ret)
3276 mlog_errno(ret);
3277 }
3278out:
3279 if (ret) {
3280 if (ctxt->meta_ac) {
3281 ocfs2_free_alloc_context(ctxt->meta_ac);
3282 ctxt->meta_ac = NULL;
3283 }
3284
3285 /*
3286 * We cannot have an error and a non null ctxt->data_ac.
3287 */
3288 }
3289
3290 return ret;
3291}
3292
Tao Ma85db90e2008-11-12 08:27:01 +08003293static int __ocfs2_xattr_set_handle(struct inode *inode,
3294 struct ocfs2_dinode *di,
3295 struct ocfs2_xattr_info *xi,
3296 struct ocfs2_xattr_search *xis,
3297 struct ocfs2_xattr_search *xbs,
3298 struct ocfs2_xattr_set_ctxt *ctxt)
3299{
Tao Ma9f868f12008-11-19 16:48:42 +08003300 int ret = 0, credits, old_found;
Tao Ma85db90e2008-11-12 08:27:01 +08003301
Joel Becker6b240ff2009-08-14 18:02:52 -07003302 if (!xi->xi_value) {
Tao Ma85db90e2008-11-12 08:27:01 +08003303 /* Remove existing extended attribute */
3304 if (!xis->not_found)
3305 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
3306 else if (!xbs->not_found)
3307 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
3308 } else {
3309 /* We always try to set extended attribute into inode first*/
3310 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
3311 if (!ret && !xbs->not_found) {
3312 /*
3313 * If succeed and that extended attribute existing in
3314 * external block, then we will remove it.
3315 */
Joel Becker6b240ff2009-08-14 18:02:52 -07003316 xi->xi_value = NULL;
3317 xi->xi_value_len = 0;
Tao Ma85db90e2008-11-12 08:27:01 +08003318
Tao Ma9f868f12008-11-19 16:48:42 +08003319 old_found = xis->not_found;
Tao Ma85db90e2008-11-12 08:27:01 +08003320 xis->not_found = -ENODATA;
3321 ret = ocfs2_calc_xattr_set_need(inode,
3322 di,
3323 xi,
3324 xis,
3325 xbs,
3326 NULL,
3327 NULL,
3328 &credits);
Tao Ma9f868f12008-11-19 16:48:42 +08003329 xis->not_found = old_found;
Tao Ma85db90e2008-11-12 08:27:01 +08003330 if (ret) {
3331 mlog_errno(ret);
3332 goto out;
3333 }
3334
Tao Mac901fb02010-04-26 14:34:57 +08003335 ret = ocfs2_extend_trans(ctxt->handle, credits);
Tao Ma85db90e2008-11-12 08:27:01 +08003336 if (ret) {
3337 mlog_errno(ret);
3338 goto out;
3339 }
3340 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
Tao Ma5f5261a2010-05-13 22:49:05 +08003341 } else if ((ret == -ENOSPC) && !ctxt->set_abort) {
Tao Ma85db90e2008-11-12 08:27:01 +08003342 if (di->i_xattr_loc && !xbs->xattr_bh) {
3343 ret = ocfs2_xattr_block_find(inode,
Joel Becker6b240ff2009-08-14 18:02:52 -07003344 xi->xi_name_index,
3345 xi->xi_name, xbs);
Tao Ma85db90e2008-11-12 08:27:01 +08003346 if (ret)
3347 goto out;
3348
Tao Ma9f868f12008-11-19 16:48:42 +08003349 old_found = xis->not_found;
Tao Ma85db90e2008-11-12 08:27:01 +08003350 xis->not_found = -ENODATA;
3351 ret = ocfs2_calc_xattr_set_need(inode,
3352 di,
3353 xi,
3354 xis,
3355 xbs,
3356 NULL,
3357 NULL,
3358 &credits);
Tao Ma9f868f12008-11-19 16:48:42 +08003359 xis->not_found = old_found;
Tao Ma85db90e2008-11-12 08:27:01 +08003360 if (ret) {
3361 mlog_errno(ret);
3362 goto out;
3363 }
3364
Tao Mac901fb02010-04-26 14:34:57 +08003365 ret = ocfs2_extend_trans(ctxt->handle, credits);
Tao Ma85db90e2008-11-12 08:27:01 +08003366 if (ret) {
3367 mlog_errno(ret);
3368 goto out;
3369 }
3370 }
3371 /*
3372 * If no space in inode, we will set extended attribute
3373 * into external block.
3374 */
3375 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
3376 if (ret)
3377 goto out;
3378 if (!xis->not_found) {
3379 /*
3380 * If succeed and that extended attribute
3381 * existing in inode, we will remove it.
3382 */
Joel Becker6b240ff2009-08-14 18:02:52 -07003383 xi->xi_value = NULL;
3384 xi->xi_value_len = 0;
Tao Ma85db90e2008-11-12 08:27:01 +08003385 xbs->not_found = -ENODATA;
3386 ret = ocfs2_calc_xattr_set_need(inode,
3387 di,
3388 xi,
3389 xis,
3390 xbs,
3391 NULL,
3392 NULL,
3393 &credits);
3394 if (ret) {
3395 mlog_errno(ret);
3396 goto out;
3397 }
3398
Tao Mac901fb02010-04-26 14:34:57 +08003399 ret = ocfs2_extend_trans(ctxt->handle, credits);
Tao Ma85db90e2008-11-12 08:27:01 +08003400 if (ret) {
3401 mlog_errno(ret);
3402 goto out;
3403 }
3404 ret = ocfs2_xattr_ibody_set(inode, xi,
3405 xis, ctxt);
3406 }
3407 }
3408 }
3409
Tao Ma4b3f6202008-12-05 06:20:55 +08003410 if (!ret) {
3411 /* Update inode ctime. */
Joel Becker0cf2f762009-02-12 16:41:25 -08003412 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode),
Tao Ma89a907a2009-02-17 04:39:28 +08003413 xis->inode_bh,
3414 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Ma4b3f6202008-12-05 06:20:55 +08003415 if (ret) {
3416 mlog_errno(ret);
3417 goto out;
3418 }
3419
Deepa Dinamani078cd822016-09-14 07:48:04 -07003420 inode->i_ctime = current_time(inode);
Tao Ma4b3f6202008-12-05 06:20:55 +08003421 di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
3422 di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
3423 ocfs2_journal_dirty(ctxt->handle, xis->inode_bh);
3424 }
Tao Ma85db90e2008-11-12 08:27:01 +08003425out:
3426 return ret;
3427}
3428
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003429/*
Tiger Yang6c3faba2008-11-14 11:16:03 +08003430 * This function only called duing creating inode
3431 * for init security/acl xattrs of the new inode.
Tiger Yang008aafa2008-12-09 16:43:08 +08003432 * All transanction credits have been reserved in mknod.
Tiger Yang6c3faba2008-11-14 11:16:03 +08003433 */
3434int ocfs2_xattr_set_handle(handle_t *handle,
3435 struct inode *inode,
3436 struct buffer_head *di_bh,
3437 int name_index,
3438 const char *name,
3439 const void *value,
3440 size_t value_len,
3441 int flags,
3442 struct ocfs2_alloc_context *meta_ac,
3443 struct ocfs2_alloc_context *data_ac)
3444{
3445 struct ocfs2_dinode *di;
3446 int ret;
3447
3448 struct ocfs2_xattr_info xi = {
Joel Becker6b240ff2009-08-14 18:02:52 -07003449 .xi_name_index = name_index,
3450 .xi_name = name,
Joel Becker18853b92009-08-14 18:17:07 -07003451 .xi_name_len = strlen(name),
Joel Becker6b240ff2009-08-14 18:02:52 -07003452 .xi_value = value,
3453 .xi_value_len = value_len,
Tiger Yang6c3faba2008-11-14 11:16:03 +08003454 };
3455
3456 struct ocfs2_xattr_search xis = {
3457 .not_found = -ENODATA,
3458 };
3459
3460 struct ocfs2_xattr_search xbs = {
3461 .not_found = -ENODATA,
3462 };
3463
3464 struct ocfs2_xattr_set_ctxt ctxt = {
3465 .handle = handle,
3466 .meta_ac = meta_ac,
3467 .data_ac = data_ac,
3468 };
3469
3470 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
3471 return -EOPNOTSUPP;
3472
Tiger Yang008aafa2008-12-09 16:43:08 +08003473 /*
3474 * In extreme situation, may need xattr bucket when
3475 * block size is too small. And we have already reserved
3476 * the credits for bucket in mknod.
3477 */
3478 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) {
3479 xbs.bucket = ocfs2_xattr_bucket_new(inode);
3480 if (!xbs.bucket) {
3481 mlog_errno(-ENOMEM);
3482 return -ENOMEM;
3483 }
3484 }
3485
Tiger Yang6c3faba2008-11-14 11:16:03 +08003486 xis.inode_bh = xbs.inode_bh = di_bh;
3487 di = (struct ocfs2_dinode *)di_bh->b_data;
3488
3489 down_write(&OCFS2_I(inode)->ip_xattr_sem);
3490
3491 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
3492 if (ret)
3493 goto cleanup;
3494 if (xis.not_found) {
3495 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
3496 if (ret)
3497 goto cleanup;
3498 }
3499
3500 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
3501
3502cleanup:
3503 up_write(&OCFS2_I(inode)->ip_xattr_sem);
3504 brelse(xbs.xattr_bh);
Tiger Yang008aafa2008-12-09 16:43:08 +08003505 ocfs2_xattr_bucket_free(xbs.bucket);
Tiger Yang6c3faba2008-11-14 11:16:03 +08003506
3507 return ret;
3508}
3509
3510/*
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003511 * ocfs2_xattr_set()
3512 *
3513 * Set, replace or remove an extended attribute for this inode.
3514 * value is NULL to remove an existing extended attribute, else either
3515 * create or replace an extended attribute.
3516 */
3517int ocfs2_xattr_set(struct inode *inode,
3518 int name_index,
3519 const char *name,
3520 const void *value,
3521 size_t value_len,
3522 int flags)
3523{
3524 struct buffer_head *di_bh = NULL;
3525 struct ocfs2_dinode *di;
Eric Ren8818efa2017-06-23 15:08:55 -07003526 int ret, credits, had_lock, ref_meta = 0, ref_credits = 0;
Tao Ma78f30c32008-11-12 08:27:00 +08003527 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Tao Ma85db90e2008-11-12 08:27:01 +08003528 struct inode *tl_inode = osb->osb_tl_inode;
Younger Liu6ea437a2013-09-11 14:19:56 -07003529 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, NULL, };
Tao Ma492a8a32009-08-18 11:43:17 +08003530 struct ocfs2_refcount_tree *ref_tree = NULL;
Eric Ren8818efa2017-06-23 15:08:55 -07003531 struct ocfs2_lock_holder oh;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003532
3533 struct ocfs2_xattr_info xi = {
Joel Becker6b240ff2009-08-14 18:02:52 -07003534 .xi_name_index = name_index,
3535 .xi_name = name,
Joel Becker18853b92009-08-14 18:17:07 -07003536 .xi_name_len = strlen(name),
Joel Becker6b240ff2009-08-14 18:02:52 -07003537 .xi_value = value,
3538 .xi_value_len = value_len,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003539 };
3540
3541 struct ocfs2_xattr_search xis = {
3542 .not_found = -ENODATA,
3543 };
3544
3545 struct ocfs2_xattr_search xbs = {
3546 .not_found = -ENODATA,
3547 };
3548
piaojun1119d3c2018-04-05 16:18:33 -07003549 if (!ocfs2_supports_xattr(osb))
Tiger Yang8154da32008-08-18 17:11:46 +08003550 return -EOPNOTSUPP;
3551
Joel Beckerba937122008-10-24 19:13:20 -07003552 /*
3553 * Only xbs will be used on indexed trees. xis doesn't need a
3554 * bucket.
3555 */
3556 xbs.bucket = ocfs2_xattr_bucket_new(inode);
3557 if (!xbs.bucket) {
3558 mlog_errno(-ENOMEM);
3559 return -ENOMEM;
3560 }
3561
Eric Ren8818efa2017-06-23 15:08:55 -07003562 had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 1, &oh);
3563 if (had_lock < 0) {
3564 ret = had_lock;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003565 mlog_errno(ret);
Joel Beckerba937122008-10-24 19:13:20 -07003566 goto cleanup_nolock;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003567 }
3568 xis.inode_bh = xbs.inode_bh = di_bh;
3569 di = (struct ocfs2_dinode *)di_bh->b_data;
3570
3571 down_write(&OCFS2_I(inode)->ip_xattr_sem);
3572 /*
3573 * Scan inode and external block to find the same name
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003574 * extended attribute and collect search information.
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003575 */
3576 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
3577 if (ret)
3578 goto cleanup;
3579 if (xis.not_found) {
3580 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
3581 if (ret)
3582 goto cleanup;
3583 }
3584
3585 if (xis.not_found && xbs.not_found) {
3586 ret = -ENODATA;
3587 if (flags & XATTR_REPLACE)
3588 goto cleanup;
3589 ret = 0;
3590 if (!value)
3591 goto cleanup;
3592 } else {
3593 ret = -EEXIST;
3594 if (flags & XATTR_CREATE)
3595 goto cleanup;
3596 }
3597
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003598 /* Check whether the value is refcounted and do some preparation. */
Darrick J. Wong84e40082016-11-09 14:13:09 -08003599 if (ocfs2_is_refcount_inode(inode) &&
Tao Ma492a8a32009-08-18 11:43:17 +08003600 (!xis.not_found || !xbs.not_found)) {
3601 ret = ocfs2_prepare_refcount_xattr(inode, di, &xi,
3602 &xis, &xbs, &ref_tree,
3603 &ref_meta, &ref_credits);
3604 if (ret) {
3605 mlog_errno(ret);
3606 goto cleanup;
3607 }
3608 }
Tao Ma85db90e2008-11-12 08:27:01 +08003609
Al Viro59551022016-01-22 15:40:57 -05003610 inode_lock(tl_inode);
Tao Ma85db90e2008-11-12 08:27:01 +08003611
3612 if (ocfs2_truncate_log_needs_flush(osb)) {
3613 ret = __ocfs2_flush_truncate_log(osb);
3614 if (ret < 0) {
Al Viro59551022016-01-22 15:40:57 -05003615 inode_unlock(tl_inode);
Tao Ma85db90e2008-11-12 08:27:01 +08003616 mlog_errno(ret);
3617 goto cleanup;
3618 }
3619 }
Al Viro59551022016-01-22 15:40:57 -05003620 inode_unlock(tl_inode);
Tao Ma85db90e2008-11-12 08:27:01 +08003621
3622 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
Tao Ma492a8a32009-08-18 11:43:17 +08003623 &xbs, &ctxt, ref_meta, &credits);
Tao Ma78f30c32008-11-12 08:27:00 +08003624 if (ret) {
3625 mlog_errno(ret);
3626 goto cleanup;
3627 }
3628
Tao Ma4b3f6202008-12-05 06:20:55 +08003629 /* we need to update inode's ctime field, so add credit for it. */
3630 credits += OCFS2_INODE_UPDATE_CREDITS;
Tao Ma492a8a32009-08-18 11:43:17 +08003631 ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits);
Tao Ma85db90e2008-11-12 08:27:01 +08003632 if (IS_ERR(ctxt.handle)) {
3633 ret = PTR_ERR(ctxt.handle);
3634 mlog_errno(ret);
Younger Liu6ea437a2013-09-11 14:19:56 -07003635 goto out_free_ac;
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003636 }
Tao Ma85db90e2008-11-12 08:27:01 +08003637
3638 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -07003639 ocfs2_update_inode_fsync_trans(ctxt.handle, inode, 0);
Tao Ma85db90e2008-11-12 08:27:01 +08003640
3641 ocfs2_commit_trans(osb, ctxt.handle);
3642
Younger Liu6ea437a2013-09-11 14:19:56 -07003643out_free_ac:
Tao Ma78f30c32008-11-12 08:27:00 +08003644 if (ctxt.data_ac)
3645 ocfs2_free_alloc_context(ctxt.data_ac);
3646 if (ctxt.meta_ac)
3647 ocfs2_free_alloc_context(ctxt.meta_ac);
3648 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
3649 ocfs2_schedule_truncate_log_flush(osb, 1);
3650 ocfs2_run_deallocs(osb, &ctxt.dealloc);
Tao Ma8b2c0db2009-08-18 11:43:49 +08003651
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003652cleanup:
Tao Ma492a8a32009-08-18 11:43:17 +08003653 if (ref_tree)
3654 ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003655 up_write(&OCFS2_I(inode)->ip_xattr_sem);
Tao Ma8b2c0db2009-08-18 11:43:49 +08003656 if (!value && !ret) {
3657 ret = ocfs2_try_remove_refcount_tree(inode, di_bh);
3658 if (ret)
3659 mlog_errno(ret);
3660 }
Eric Ren8818efa2017-06-23 15:08:55 -07003661 ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
Joel Beckerba937122008-10-24 19:13:20 -07003662cleanup_nolock:
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003663 brelse(di_bh);
3664 brelse(xbs.xattr_bh);
Joel Beckerba937122008-10-24 19:13:20 -07003665 ocfs2_xattr_bucket_free(xbs.bucket);
Tiger Yangcf1d6c72008-08-18 17:11:00 +08003666
3667 return ret;
3668}
3669
Tao Ma0c044f02008-08-18 17:38:50 +08003670/*
3671 * Find the xattr extent rec which may contains name_hash.
3672 * e_cpos will be the first name hash of the xattr rec.
3673 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
3674 */
3675static int ocfs2_xattr_get_rec(struct inode *inode,
3676 u32 name_hash,
3677 u64 *p_blkno,
3678 u32 *e_cpos,
3679 u32 *num_clusters,
3680 struct ocfs2_extent_list *el)
3681{
3682 int ret = 0, i;
3683 struct buffer_head *eb_bh = NULL;
3684 struct ocfs2_extent_block *eb;
3685 struct ocfs2_extent_rec *rec = NULL;
3686 u64 e_blkno = 0;
3687
3688 if (el->l_tree_depth) {
Joel Beckerfacdb772009-02-12 18:08:48 -08003689 ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash,
3690 &eb_bh);
Tao Ma0c044f02008-08-18 17:38:50 +08003691 if (ret) {
3692 mlog_errno(ret);
3693 goto out;
3694 }
3695
3696 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
3697 el = &eb->h_list;
3698
3699 if (el->l_tree_depth) {
Goldwyn Rodrigues17a5b9a2015-09-04 15:44:17 -07003700 ret = ocfs2_error(inode->i_sb,
Joe Perches7ecef142015-09-04 15:44:51 -07003701 "Inode %lu has non zero tree depth in xattr tree block %llu\n",
3702 inode->i_ino,
3703 (unsigned long long)eb_bh->b_blocknr);
Tao Ma0c044f02008-08-18 17:38:50 +08003704 goto out;
3705 }
3706 }
3707
3708 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
3709 rec = &el->l_recs[i];
3710
3711 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
3712 e_blkno = le64_to_cpu(rec->e_blkno);
3713 break;
3714 }
3715 }
3716
3717 if (!e_blkno) {
Joe Perches7ecef142015-09-04 15:44:51 -07003718 ret = ocfs2_error(inode->i_sb, "Inode %lu has bad extent record (%u, %u, 0) in xattr\n",
3719 inode->i_ino,
3720 le32_to_cpu(rec->e_cpos),
3721 ocfs2_rec_clusters(el, rec));
Tao Ma0c044f02008-08-18 17:38:50 +08003722 goto out;
3723 }
3724
3725 *p_blkno = le64_to_cpu(rec->e_blkno);
3726 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
3727 if (e_cpos)
3728 *e_cpos = le32_to_cpu(rec->e_cpos);
3729out:
3730 brelse(eb_bh);
3731 return ret;
3732}
3733
3734typedef int (xattr_bucket_func)(struct inode *inode,
3735 struct ocfs2_xattr_bucket *bucket,
3736 void *para);
3737
Tao Ma589dc262008-08-18 17:38:51 +08003738static int ocfs2_find_xe_in_bucket(struct inode *inode,
Joel Beckere2356a32008-10-27 15:01:54 -07003739 struct ocfs2_xattr_bucket *bucket,
Tao Ma589dc262008-08-18 17:38:51 +08003740 int name_index,
3741 const char *name,
3742 u32 name_hash,
3743 u16 *xe_index,
3744 int *found)
3745{
3746 int i, ret = 0, cmp = 1, block_off, new_offset;
Joel Beckere2356a32008-10-27 15:01:54 -07003747 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
Tao Ma589dc262008-08-18 17:38:51 +08003748 size_t name_len = strlen(name);
3749 struct ocfs2_xattr_entry *xe = NULL;
Tao Ma589dc262008-08-18 17:38:51 +08003750 char *xe_name;
3751
3752 /*
3753 * We don't use binary search in the bucket because there
3754 * may be multiple entries with the same name hash.
3755 */
3756 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3757 xe = &xh->xh_entries[i];
3758
3759 if (name_hash > le32_to_cpu(xe->xe_name_hash))
3760 continue;
3761 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
3762 break;
3763
3764 cmp = name_index - ocfs2_xattr_get_type(xe);
3765 if (!cmp)
3766 cmp = name_len - xe->xe_name_len;
3767 if (cmp)
3768 continue;
3769
Tao Mafd68a892009-08-18 11:43:21 +08003770 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
Tao Ma589dc262008-08-18 17:38:51 +08003771 xh,
3772 i,
3773 &block_off,
3774 &new_offset);
3775 if (ret) {
3776 mlog_errno(ret);
3777 break;
3778 }
3779
Joel Becker970e4932008-11-13 14:49:19 -08003780
Joel Beckere2356a32008-10-27 15:01:54 -07003781 xe_name = bucket_block(bucket, block_off) + new_offset;
3782 if (!memcmp(name, xe_name, name_len)) {
Tao Ma589dc262008-08-18 17:38:51 +08003783 *xe_index = i;
3784 *found = 1;
3785 ret = 0;
3786 break;
3787 }
3788 }
3789
3790 return ret;
3791}
3792
3793/*
3794 * Find the specified xattr entry in a series of buckets.
3795 * This series start from p_blkno and last for num_clusters.
3796 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
3797 * the num of the valid buckets.
3798 *
3799 * Return the buffer_head this xattr should reside in. And if the xattr's
3800 * hash is in the gap of 2 buckets, return the lower bucket.
3801 */
3802static int ocfs2_xattr_bucket_find(struct inode *inode,
3803 int name_index,
3804 const char *name,
3805 u32 name_hash,
3806 u64 p_blkno,
3807 u32 first_hash,
3808 u32 num_clusters,
3809 struct ocfs2_xattr_search *xs)
3810{
3811 int ret, found = 0;
Tao Ma589dc262008-08-18 17:38:51 +08003812 struct ocfs2_xattr_header *xh = NULL;
3813 struct ocfs2_xattr_entry *xe = NULL;
3814 u16 index = 0;
3815 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3816 int low_bucket = 0, bucket, high_bucket;
Joel Beckere2356a32008-10-27 15:01:54 -07003817 struct ocfs2_xattr_bucket *search;
Joel Beckere2356a32008-10-27 15:01:54 -07003818 u64 blkno, lower_blkno = 0;
Tao Ma589dc262008-08-18 17:38:51 +08003819
Joel Beckere2356a32008-10-27 15:01:54 -07003820 search = ocfs2_xattr_bucket_new(inode);
3821 if (!search) {
3822 ret = -ENOMEM;
3823 mlog_errno(ret);
3824 goto out;
3825 }
3826
3827 ret = ocfs2_read_xattr_bucket(search, p_blkno);
Tao Ma589dc262008-08-18 17:38:51 +08003828 if (ret) {
3829 mlog_errno(ret);
3830 goto out;
3831 }
3832
Joel Beckere2356a32008-10-27 15:01:54 -07003833 xh = bucket_xh(search);
Tao Ma589dc262008-08-18 17:38:51 +08003834 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
Tao Ma589dc262008-08-18 17:38:51 +08003835 while (low_bucket <= high_bucket) {
Joel Beckere2356a32008-10-27 15:01:54 -07003836 ocfs2_xattr_bucket_relse(search);
3837
Tao Ma589dc262008-08-18 17:38:51 +08003838 bucket = (low_bucket + high_bucket) / 2;
Tao Ma589dc262008-08-18 17:38:51 +08003839 blkno = p_blkno + bucket * blk_per_bucket;
Joel Beckere2356a32008-10-27 15:01:54 -07003840 ret = ocfs2_read_xattr_bucket(search, blkno);
Tao Ma589dc262008-08-18 17:38:51 +08003841 if (ret) {
3842 mlog_errno(ret);
3843 goto out;
3844 }
3845
Joel Beckere2356a32008-10-27 15:01:54 -07003846 xh = bucket_xh(search);
Tao Ma589dc262008-08-18 17:38:51 +08003847 xe = &xh->xh_entries[0];
3848 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
3849 high_bucket = bucket - 1;
3850 continue;
3851 }
3852
3853 /*
3854 * Check whether the hash of the last entry in our
Tao Ma5a0956112008-09-19 22:17:41 +08003855 * bucket is larger than the search one. for an empty
3856 * bucket, the last one is also the first one.
Tao Ma589dc262008-08-18 17:38:51 +08003857 */
Tao Ma5a0956112008-09-19 22:17:41 +08003858 if (xh->xh_count)
3859 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
3860
Joel Beckere2356a32008-10-27 15:01:54 -07003861 /* record lower_blkno which may be the insert place. */
3862 lower_blkno = blkno;
Tao Ma589dc262008-08-18 17:38:51 +08003863
3864 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
3865 low_bucket = bucket + 1;
3866 continue;
3867 }
3868
3869 /* the searched xattr should reside in this bucket if exists. */
Joel Beckere2356a32008-10-27 15:01:54 -07003870 ret = ocfs2_find_xe_in_bucket(inode, search,
Tao Ma589dc262008-08-18 17:38:51 +08003871 name_index, name, name_hash,
3872 &index, &found);
3873 if (ret) {
3874 mlog_errno(ret);
3875 goto out;
3876 }
3877 break;
3878 }
3879
3880 /*
3881 * Record the bucket we have found.
3882 * When the xattr's hash value is in the gap of 2 buckets, we will
3883 * always set it to the previous bucket.
3884 */
Joel Beckere2356a32008-10-27 15:01:54 -07003885 if (!lower_blkno)
3886 lower_blkno = p_blkno;
3887
3888 /* This should be in cache - we just read it during the search */
3889 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
3890 if (ret) {
3891 mlog_errno(ret);
3892 goto out;
Tao Ma589dc262008-08-18 17:38:51 +08003893 }
Tao Ma589dc262008-08-18 17:38:51 +08003894
Joel Beckerba937122008-10-24 19:13:20 -07003895 xs->header = bucket_xh(xs->bucket);
3896 xs->base = bucket_block(xs->bucket, 0);
Tao Ma589dc262008-08-18 17:38:51 +08003897 xs->end = xs->base + inode->i_sb->s_blocksize;
3898
3899 if (found) {
Tao Ma589dc262008-08-18 17:38:51 +08003900 xs->here = &xs->header->xh_entries[index];
Tao Ma402b4182011-02-23 22:01:17 +08003901 trace_ocfs2_xattr_bucket_find(OCFS2_I(inode)->ip_blkno,
3902 name, name_index, name_hash,
3903 (unsigned long long)bucket_blkno(xs->bucket),
3904 index);
Tao Ma589dc262008-08-18 17:38:51 +08003905 } else
3906 ret = -ENODATA;
3907
3908out:
Joel Beckere2356a32008-10-27 15:01:54 -07003909 ocfs2_xattr_bucket_free(search);
Tao Ma589dc262008-08-18 17:38:51 +08003910 return ret;
3911}
3912
3913static int ocfs2_xattr_index_block_find(struct inode *inode,
3914 struct buffer_head *root_bh,
3915 int name_index,
3916 const char *name,
3917 struct ocfs2_xattr_search *xs)
3918{
3919 int ret;
3920 struct ocfs2_xattr_block *xb =
3921 (struct ocfs2_xattr_block *)root_bh->b_data;
3922 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
3923 struct ocfs2_extent_list *el = &xb_root->xt_list;
3924 u64 p_blkno = 0;
3925 u32 first_hash, num_clusters = 0;
Tao Ma2057e5c2008-10-09 23:06:13 +08003926 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
Tao Ma589dc262008-08-18 17:38:51 +08003927
3928 if (le16_to_cpu(el->l_next_free_rec) == 0)
3929 return -ENODATA;
3930
Tao Ma402b4182011-02-23 22:01:17 +08003931 trace_ocfs2_xattr_index_block_find(OCFS2_I(inode)->ip_blkno,
3932 name, name_index, name_hash,
3933 (unsigned long long)root_bh->b_blocknr,
3934 -1);
Tao Ma589dc262008-08-18 17:38:51 +08003935
3936 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3937 &num_clusters, el);
3938 if (ret) {
3939 mlog_errno(ret);
3940 goto out;
3941 }
3942
3943 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3944
Tao Ma402b4182011-02-23 22:01:17 +08003945 trace_ocfs2_xattr_index_block_find_rec(OCFS2_I(inode)->ip_blkno,
3946 name, name_index, first_hash,
3947 (unsigned long long)p_blkno,
3948 num_clusters);
Tao Ma589dc262008-08-18 17:38:51 +08003949
3950 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3951 p_blkno, first_hash, num_clusters, xs);
3952
3953out:
3954 return ret;
3955}
3956
Tao Ma0c044f02008-08-18 17:38:50 +08003957static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3958 u64 blkno,
3959 u32 clusters,
3960 xattr_bucket_func *func,
3961 void *para)
3962{
Joel Becker6dde41d2008-10-24 17:16:48 -07003963 int i, ret = 0;
Tao Ma0c044f02008-08-18 17:38:50 +08003964 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3965 u32 num_buckets = clusters * bpc;
Joel Beckerba937122008-10-24 19:13:20 -07003966 struct ocfs2_xattr_bucket *bucket;
Tao Ma0c044f02008-08-18 17:38:50 +08003967
Joel Beckerba937122008-10-24 19:13:20 -07003968 bucket = ocfs2_xattr_bucket_new(inode);
3969 if (!bucket) {
3970 mlog_errno(-ENOMEM);
3971 return -ENOMEM;
3972 }
Tao Ma0c044f02008-08-18 17:38:50 +08003973
Tao Ma402b4182011-02-23 22:01:17 +08003974 trace_ocfs2_iterate_xattr_buckets(
3975 (unsigned long long)OCFS2_I(inode)->ip_blkno,
3976 (unsigned long long)blkno, clusters);
Tao Ma0c044f02008-08-18 17:38:50 +08003977
Joel Beckerba937122008-10-24 19:13:20 -07003978 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3979 ret = ocfs2_read_xattr_bucket(bucket, blkno);
Tao Ma0c044f02008-08-18 17:38:50 +08003980 if (ret) {
3981 mlog_errno(ret);
Joel Beckerba937122008-10-24 19:13:20 -07003982 break;
Tao Ma0c044f02008-08-18 17:38:50 +08003983 }
3984
Tao Ma0c044f02008-08-18 17:38:50 +08003985 /*
3986 * The real bucket num in this series of blocks is stored
3987 * in the 1st bucket.
3988 */
3989 if (i == 0)
Joel Beckerba937122008-10-24 19:13:20 -07003990 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
Tao Ma0c044f02008-08-18 17:38:50 +08003991
Tao Ma402b4182011-02-23 22:01:17 +08003992 trace_ocfs2_iterate_xattr_bucket((unsigned long long)blkno,
Joel Beckerba937122008-10-24 19:13:20 -07003993 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
Tao Ma0c044f02008-08-18 17:38:50 +08003994 if (func) {
Joel Beckerba937122008-10-24 19:13:20 -07003995 ret = func(inode, bucket, para);
Tao Maa46fa682009-05-04 05:18:09 +08003996 if (ret && ret != -ERANGE)
Tao Ma0c044f02008-08-18 17:38:50 +08003997 mlog_errno(ret);
Joel Beckerba937122008-10-24 19:13:20 -07003998 /* Fall through to bucket_relse() */
Tao Ma0c044f02008-08-18 17:38:50 +08003999 }
4000
Joel Beckerba937122008-10-24 19:13:20 -07004001 ocfs2_xattr_bucket_relse(bucket);
4002 if (ret)
4003 break;
Tao Ma0c044f02008-08-18 17:38:50 +08004004 }
4005
Joel Beckerba937122008-10-24 19:13:20 -07004006 ocfs2_xattr_bucket_free(bucket);
Tao Ma0c044f02008-08-18 17:38:50 +08004007 return ret;
4008}
4009
4010struct ocfs2_xattr_tree_list {
4011 char *buffer;
4012 size_t buffer_size;
Tao Ma936b8832008-10-09 23:06:14 +08004013 size_t result;
Tao Ma0c044f02008-08-18 17:38:50 +08004014};
4015
Tao Mafd68a892009-08-18 11:43:21 +08004016static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb,
Tao Ma0c044f02008-08-18 17:38:50 +08004017 struct ocfs2_xattr_header *xh,
4018 int index,
4019 int *block_off,
4020 int *new_offset)
4021{
4022 u16 name_offset;
4023
4024 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
4025 return -EINVAL;
4026
4027 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
4028
Tao Mafd68a892009-08-18 11:43:21 +08004029 *block_off = name_offset >> sb->s_blocksize_bits;
4030 *new_offset = name_offset % sb->s_blocksize;
Tao Ma0c044f02008-08-18 17:38:50 +08004031
4032 return 0;
4033}
4034
4035static int ocfs2_list_xattr_bucket(struct inode *inode,
4036 struct ocfs2_xattr_bucket *bucket,
4037 void *para)
4038{
Tao Ma936b8832008-10-09 23:06:14 +08004039 int ret = 0, type;
Tao Ma0c044f02008-08-18 17:38:50 +08004040 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
Tao Ma0c044f02008-08-18 17:38:50 +08004041 int i, block_off, new_offset;
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +01004042 const char *name;
Tao Ma0c044f02008-08-18 17:38:50 +08004043
Joel Becker3e632942008-10-24 17:04:49 -07004044 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
4045 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
Tao Ma936b8832008-10-09 23:06:14 +08004046 type = ocfs2_xattr_get_type(entry);
Tao Ma0c044f02008-08-18 17:38:50 +08004047
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +01004048 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
4049 bucket_xh(bucket),
4050 i,
4051 &block_off,
4052 &new_offset);
4053 if (ret)
4054 break;
Tao Ma936b8832008-10-09 23:06:14 +08004055
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +01004056 name = (const char *)bucket_block(bucket, block_off) +
4057 new_offset;
4058 ret = ocfs2_xattr_list_entry(inode->i_sb,
4059 xl->buffer,
4060 xl->buffer_size,
4061 &xl->result,
4062 type, name,
4063 entry->xe_name_len);
4064 if (ret)
4065 break;
Tao Ma0c044f02008-08-18 17:38:50 +08004066 }
4067
4068 return ret;
4069}
4070
Tao Ma47bca492009-08-18 11:43:42 +08004071static int ocfs2_iterate_xattr_index_block(struct inode *inode,
4072 struct buffer_head *blk_bh,
4073 xattr_tree_rec_func *rec_func,
4074 void *para)
Tao Ma0c044f02008-08-18 17:38:50 +08004075{
Tao Ma47bca492009-08-18 11:43:42 +08004076 struct ocfs2_xattr_block *xb =
4077 (struct ocfs2_xattr_block *)blk_bh->b_data;
4078 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
Tao Ma0c044f02008-08-18 17:38:50 +08004079 int ret = 0;
4080 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
4081 u64 p_blkno = 0;
Tao Ma0c044f02008-08-18 17:38:50 +08004082
Tao Ma47bca492009-08-18 11:43:42 +08004083 if (!el->l_next_free_rec || !rec_func)
Tao Ma0c044f02008-08-18 17:38:50 +08004084 return 0;
4085
4086 while (name_hash > 0) {
4087 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
4088 &e_cpos, &num_clusters, el);
4089 if (ret) {
4090 mlog_errno(ret);
Tao Ma47bca492009-08-18 11:43:42 +08004091 break;
Tao Ma0c044f02008-08-18 17:38:50 +08004092 }
4093
Tao Ma47bca492009-08-18 11:43:42 +08004094 ret = rec_func(inode, blk_bh, p_blkno, e_cpos,
4095 num_clusters, para);
Tao Ma0c044f02008-08-18 17:38:50 +08004096 if (ret) {
Tao Maa46fa682009-05-04 05:18:09 +08004097 if (ret != -ERANGE)
4098 mlog_errno(ret);
Tao Ma47bca492009-08-18 11:43:42 +08004099 break;
Tao Ma0c044f02008-08-18 17:38:50 +08004100 }
4101
4102 if (e_cpos == 0)
4103 break;
4104
4105 name_hash = e_cpos - 1;
4106 }
4107
Tao Ma47bca492009-08-18 11:43:42 +08004108 return ret;
4109
4110}
4111
4112static int ocfs2_list_xattr_tree_rec(struct inode *inode,
4113 struct buffer_head *root_bh,
4114 u64 blkno, u32 cpos, u32 len, void *para)
4115{
4116 return ocfs2_iterate_xattr_buckets(inode, blkno, len,
4117 ocfs2_list_xattr_bucket, para);
4118}
4119
4120static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
4121 struct buffer_head *blk_bh,
4122 char *buffer,
4123 size_t buffer_size)
4124{
4125 int ret;
4126 struct ocfs2_xattr_tree_list xl = {
4127 .buffer = buffer,
4128 .buffer_size = buffer_size,
4129 .result = 0,
4130 };
4131
4132 ret = ocfs2_iterate_xattr_index_block(inode, blk_bh,
4133 ocfs2_list_xattr_tree_rec, &xl);
4134 if (ret) {
4135 mlog_errno(ret);
4136 goto out;
4137 }
4138
Tao Ma936b8832008-10-09 23:06:14 +08004139 ret = xl.result;
Tao Ma0c044f02008-08-18 17:38:50 +08004140out:
4141 return ret;
4142}
Tao Ma01225592008-08-18 17:38:53 +08004143
4144static int cmp_xe(const void *a, const void *b)
4145{
4146 const struct ocfs2_xattr_entry *l = a, *r = b;
4147 u32 l_hash = le32_to_cpu(l->xe_name_hash);
4148 u32 r_hash = le32_to_cpu(r->xe_name_hash);
4149
4150 if (l_hash > r_hash)
4151 return 1;
4152 if (l_hash < r_hash)
4153 return -1;
4154 return 0;
4155}
4156
4157static void swap_xe(void *a, void *b, int size)
4158{
4159 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
4160
4161 tmp = *l;
4162 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
4163 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
4164}
4165
4166/*
4167 * When the ocfs2_xattr_block is filled up, new bucket will be created
4168 * and all the xattr entries will be moved to the new bucket.
Joel Becker178eeac2008-10-27 15:18:29 -07004169 * The header goes at the start of the bucket, and the names+values are
4170 * filled from the end. This is why *target starts as the last buffer.
Tao Ma01225592008-08-18 17:38:53 +08004171 * Note: we need to sort the entries since they are not saved in order
4172 * in the ocfs2_xattr_block.
4173 */
4174static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
4175 struct buffer_head *xb_bh,
Joel Becker178eeac2008-10-27 15:18:29 -07004176 struct ocfs2_xattr_bucket *bucket)
Tao Ma01225592008-08-18 17:38:53 +08004177{
4178 int i, blocksize = inode->i_sb->s_blocksize;
Joel Becker178eeac2008-10-27 15:18:29 -07004179 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
Tao Ma01225592008-08-18 17:38:53 +08004180 u16 offset, size, off_change;
4181 struct ocfs2_xattr_entry *xe;
4182 struct ocfs2_xattr_block *xb =
4183 (struct ocfs2_xattr_block *)xb_bh->b_data;
4184 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
Joel Becker178eeac2008-10-27 15:18:29 -07004185 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
Tao Ma01225592008-08-18 17:38:53 +08004186 u16 count = le16_to_cpu(xb_xh->xh_count);
Joel Becker178eeac2008-10-27 15:18:29 -07004187 char *src = xb_bh->b_data;
4188 char *target = bucket_block(bucket, blks - 1);
Tao Ma01225592008-08-18 17:38:53 +08004189
Tao Ma402b4182011-02-23 22:01:17 +08004190 trace_ocfs2_cp_xattr_block_to_bucket_begin(
4191 (unsigned long long)xb_bh->b_blocknr,
4192 (unsigned long long)bucket_blkno(bucket));
Tao Ma01225592008-08-18 17:38:53 +08004193
Joel Becker178eeac2008-10-27 15:18:29 -07004194 for (i = 0; i < blks; i++)
4195 memset(bucket_block(bucket, i), 0, blocksize);
4196
Tao Ma01225592008-08-18 17:38:53 +08004197 /*
4198 * Since the xe_name_offset is based on ocfs2_xattr_header,
4199 * there is a offset change corresponding to the change of
4200 * ocfs2_xattr_header's position.
4201 */
4202 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
4203 xe = &xb_xh->xh_entries[count - 1];
4204 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
4205 size = blocksize - offset;
4206
4207 /* copy all the names and values. */
Tao Ma01225592008-08-18 17:38:53 +08004208 memcpy(target + offset, src + offset, size);
4209
4210 /* Init new header now. */
4211 xh->xh_count = xb_xh->xh_count;
4212 xh->xh_num_buckets = cpu_to_le16(1);
4213 xh->xh_name_value_len = cpu_to_le16(size);
4214 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
4215
4216 /* copy all the entries. */
Joel Becker178eeac2008-10-27 15:18:29 -07004217 target = bucket_block(bucket, 0);
Tao Ma01225592008-08-18 17:38:53 +08004218 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
4219 size = count * sizeof(struct ocfs2_xattr_entry);
4220 memcpy(target + offset, (char *)xb_xh + offset, size);
4221
4222 /* Change the xe offset for all the xe because of the move. */
4223 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
4224 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
4225 for (i = 0; i < count; i++)
4226 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
4227
Tao Ma402b4182011-02-23 22:01:17 +08004228 trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change);
Tao Ma01225592008-08-18 17:38:53 +08004229
4230 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
4231 cmp_xe, swap_xe);
4232}
4233
4234/*
4235 * After we move xattr from block to index btree, we have to
4236 * update ocfs2_xattr_search to the new xe and base.
4237 *
4238 * When the entry is in xattr block, xattr_bh indicates the storage place.
4239 * While if the entry is in index b-tree, "bucket" indicates the
4240 * real place of the xattr.
4241 */
Joel Becker178eeac2008-10-27 15:18:29 -07004242static void ocfs2_xattr_update_xattr_search(struct inode *inode,
4243 struct ocfs2_xattr_search *xs,
4244 struct buffer_head *old_bh)
Tao Ma01225592008-08-18 17:38:53 +08004245{
Tao Ma01225592008-08-18 17:38:53 +08004246 char *buf = old_bh->b_data;
4247 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
4248 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
Joel Becker178eeac2008-10-27 15:18:29 -07004249 int i;
Tao Ma01225592008-08-18 17:38:53 +08004250
Joel Beckerba937122008-10-24 19:13:20 -07004251 xs->header = bucket_xh(xs->bucket);
Joel Becker178eeac2008-10-27 15:18:29 -07004252 xs->base = bucket_block(xs->bucket, 0);
Tao Ma01225592008-08-18 17:38:53 +08004253 xs->end = xs->base + inode->i_sb->s_blocksize;
4254
Joel Becker178eeac2008-10-27 15:18:29 -07004255 if (xs->not_found)
4256 return;
Tao Ma01225592008-08-18 17:38:53 +08004257
Joel Becker178eeac2008-10-27 15:18:29 -07004258 i = xs->here - old_xh->xh_entries;
4259 xs->here = &xs->header->xh_entries[i];
Tao Ma01225592008-08-18 17:38:53 +08004260}
4261
4262static int ocfs2_xattr_create_index_block(struct inode *inode,
Tao Ma78f30c32008-11-12 08:27:00 +08004263 struct ocfs2_xattr_search *xs,
4264 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Ma01225592008-08-18 17:38:53 +08004265{
Tao Ma85db90e2008-11-12 08:27:01 +08004266 int ret;
Tao Ma01225592008-08-18 17:38:53 +08004267 u32 bit_off, len;
4268 u64 blkno;
Tao Ma85db90e2008-11-12 08:27:01 +08004269 handle_t *handle = ctxt->handle;
Tao Ma01225592008-08-18 17:38:53 +08004270 struct ocfs2_inode_info *oi = OCFS2_I(inode);
Tao Ma01225592008-08-18 17:38:53 +08004271 struct buffer_head *xb_bh = xs->xattr_bh;
4272 struct ocfs2_xattr_block *xb =
4273 (struct ocfs2_xattr_block *)xb_bh->b_data;
4274 struct ocfs2_xattr_tree_root *xr;
4275 u16 xb_flags = le16_to_cpu(xb->xb_flags);
Tao Ma01225592008-08-18 17:38:53 +08004276
Tao Ma402b4182011-02-23 22:01:17 +08004277 trace_ocfs2_xattr_create_index_block_begin(
4278 (unsigned long long)xb_bh->b_blocknr);
Tao Ma01225592008-08-18 17:38:53 +08004279
4280 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
Joel Becker178eeac2008-10-27 15:18:29 -07004281 BUG_ON(!xs->bucket);
Tao Ma01225592008-08-18 17:38:53 +08004282
Tao Ma01225592008-08-18 17:38:53 +08004283 /*
4284 * XXX:
4285 * We can use this lock for now, and maybe move to a dedicated mutex
4286 * if performance becomes a problem later.
4287 */
4288 down_write(&oi->ip_alloc_sem);
4289
Joel Becker0cf2f762009-02-12 16:41:25 -08004290 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh,
Joel Becker84008972008-12-09 16:11:49 -08004291 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Ma01225592008-08-18 17:38:53 +08004292 if (ret) {
4293 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08004294 goto out;
Tao Ma01225592008-08-18 17:38:53 +08004295 }
4296
Joel Becker1ed9b772010-05-06 13:59:06 +08004297 ret = __ocfs2_claim_clusters(handle, ctxt->data_ac,
Tao Ma78f30c32008-11-12 08:27:00 +08004298 1, 1, &bit_off, &len);
Tao Ma01225592008-08-18 17:38:53 +08004299 if (ret) {
4300 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08004301 goto out;
Tao Ma01225592008-08-18 17:38:53 +08004302 }
4303
4304 /*
4305 * The bucket may spread in many blocks, and
4306 * we will only touch the 1st block and the last block
4307 * in the whole bucket(one for entry and one for data).
4308 */
4309 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
4310
Tao Ma402b4182011-02-23 22:01:17 +08004311 trace_ocfs2_xattr_create_index_block((unsigned long long)blkno);
Tao Ma01225592008-08-18 17:38:53 +08004312
Wengang Wang9c339252014-04-03 14:47:15 -07004313 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno, 1);
Tao Ma01225592008-08-18 17:38:53 +08004314 if (ret) {
4315 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08004316 goto out;
Tao Ma01225592008-08-18 17:38:53 +08004317 }
4318
Joel Becker178eeac2008-10-27 15:18:29 -07004319 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4320 OCFS2_JOURNAL_ACCESS_CREATE);
Joel Beckerbd60bd32008-10-20 18:25:56 -07004321 if (ret) {
4322 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08004323 goto out;
Joel Beckerbd60bd32008-10-20 18:25:56 -07004324 }
Tao Ma01225592008-08-18 17:38:53 +08004325
Joel Becker178eeac2008-10-27 15:18:29 -07004326 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
4327 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
4328
4329 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
4330
Tao Ma01225592008-08-18 17:38:53 +08004331 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
4332 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
4333 offsetof(struct ocfs2_xattr_block, xb_attrs));
4334
4335 xr = &xb->xb_attrs.xb_root;
4336 xr->xt_clusters = cpu_to_le32(1);
4337 xr->xt_last_eb_blk = 0;
4338 xr->xt_list.l_tree_depth = 0;
4339 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
4340 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
4341
4342 xr->xt_list.l_recs[0].e_cpos = 0;
4343 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
4344 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
4345
4346 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
4347
Tao Ma85db90e2008-11-12 08:27:01 +08004348 ocfs2_journal_dirty(handle, xb_bh);
Tao Ma01225592008-08-18 17:38:53 +08004349
Tao Ma85db90e2008-11-12 08:27:01 +08004350out:
Tao Ma01225592008-08-18 17:38:53 +08004351 up_write(&oi->ip_alloc_sem);
4352
Tao Ma01225592008-08-18 17:38:53 +08004353 return ret;
4354}
4355
4356static int cmp_xe_offset(const void *a, const void *b)
4357{
4358 const struct ocfs2_xattr_entry *l = a, *r = b;
4359 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
4360 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
4361
4362 if (l_name_offset < r_name_offset)
4363 return 1;
4364 if (l_name_offset > r_name_offset)
4365 return -1;
4366 return 0;
4367}
4368
4369/*
4370 * defrag a xattr bucket if we find that the bucket has some
4371 * holes beteen name/value pairs.
4372 * We will move all the name/value pairs to the end of the bucket
4373 * so that we can spare some space for insertion.
4374 */
4375static int ocfs2_defrag_xattr_bucket(struct inode *inode,
Tao Ma85db90e2008-11-12 08:27:01 +08004376 handle_t *handle,
Tao Ma01225592008-08-18 17:38:53 +08004377 struct ocfs2_xattr_bucket *bucket)
4378{
4379 int ret, i;
Joel Becker199799a2009-08-14 19:04:15 -07004380 size_t end, offset, len;
Tao Ma01225592008-08-18 17:38:53 +08004381 struct ocfs2_xattr_header *xh;
4382 char *entries, *buf, *bucket_buf = NULL;
Joel Becker9c7759a2008-10-24 16:21:03 -07004383 u64 blkno = bucket_blkno(bucket);
Tao Ma01225592008-08-18 17:38:53 +08004384 u16 xh_free_start;
Tao Ma01225592008-08-18 17:38:53 +08004385 size_t blocksize = inode->i_sb->s_blocksize;
Tao Ma01225592008-08-18 17:38:53 +08004386 struct ocfs2_xattr_entry *xe;
Tao Ma01225592008-08-18 17:38:53 +08004387
4388 /*
4389 * In order to make the operation more efficient and generic,
4390 * we copy all the blocks into a contiguous memory and do the
4391 * defragment there, so if anything is error, we will not touch
4392 * the real block.
4393 */
4394 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
4395 if (!bucket_buf) {
4396 ret = -EIO;
4397 goto out;
4398 }
4399
Joel Becker161d6f302008-10-27 15:25:18 -07004400 buf = bucket_buf;
Tao Ma1c32a2f2008-11-06 08:10:47 +08004401 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
4402 memcpy(buf, bucket_block(bucket, i), blocksize);
Joel Becker161d6f302008-10-27 15:25:18 -07004403
Tao Ma1c32a2f2008-11-06 08:10:47 +08004404 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
Joel Becker161d6f302008-10-27 15:25:18 -07004405 OCFS2_JOURNAL_ACCESS_WRITE);
4406 if (ret < 0) {
4407 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08004408 goto out;
Tao Ma01225592008-08-18 17:38:53 +08004409 }
4410
4411 xh = (struct ocfs2_xattr_header *)bucket_buf;
4412 entries = (char *)xh->xh_entries;
4413 xh_free_start = le16_to_cpu(xh->xh_free_start);
4414
Tao Ma402b4182011-02-23 22:01:17 +08004415 trace_ocfs2_defrag_xattr_bucket(
Mark Fashehde29c082008-10-29 14:45:30 -07004416 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
4417 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
Tao Ma01225592008-08-18 17:38:53 +08004418
4419 /*
4420 * sort all the entries by their offset.
4421 * the largest will be the first, so that we can
4422 * move them to the end one by one.
4423 */
4424 sort(entries, le16_to_cpu(xh->xh_count),
4425 sizeof(struct ocfs2_xattr_entry),
4426 cmp_xe_offset, swap_xe);
4427
4428 /* Move all name/values to the end of the bucket. */
4429 xe = xh->xh_entries;
4430 end = OCFS2_XATTR_BUCKET_SIZE;
4431 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
4432 offset = le16_to_cpu(xe->xe_name_offset);
Joel Becker199799a2009-08-14 19:04:15 -07004433 len = namevalue_size_xe(xe);
Tao Ma01225592008-08-18 17:38:53 +08004434
4435 /*
4436 * We must make sure that the name/value pair
4437 * exist in the same block. So adjust end to
4438 * the previous block end if needed.
4439 */
4440 if (((end - len) / blocksize !=
4441 (end - 1) / blocksize))
4442 end = end - end % blocksize;
4443
4444 if (end > offset + len) {
4445 memmove(bucket_buf + end - len,
4446 bucket_buf + offset, len);
4447 xe->xe_name_offset = cpu_to_le16(end - len);
4448 }
4449
4450 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
4451 "bucket %llu\n", (unsigned long long)blkno);
4452
4453 end -= len;
4454 }
4455
4456 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
4457 "bucket %llu\n", (unsigned long long)blkno);
4458
4459 if (xh_free_start == end)
Tao Ma85db90e2008-11-12 08:27:01 +08004460 goto out;
Tao Ma01225592008-08-18 17:38:53 +08004461
4462 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
4463 xh->xh_free_start = cpu_to_le16(end);
4464
4465 /* sort the entries by their name_hash. */
4466 sort(entries, le16_to_cpu(xh->xh_count),
4467 sizeof(struct ocfs2_xattr_entry),
4468 cmp_xe, swap_xe);
4469
4470 buf = bucket_buf;
Tao Ma1c32a2f2008-11-06 08:10:47 +08004471 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
4472 memcpy(bucket_block(bucket, i), buf, blocksize);
4473 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
Tao Ma01225592008-08-18 17:38:53 +08004474
Tao Ma01225592008-08-18 17:38:53 +08004475out:
Tao Ma01225592008-08-18 17:38:53 +08004476 kfree(bucket_buf);
4477 return ret;
4478}
4479
4480/*
Joel Beckerb5c03e72008-11-25 19:58:16 -08004481 * prev_blkno points to the start of an existing extent. new_blkno
4482 * points to a newly allocated extent. Because we know each of our
4483 * clusters contains more than bucket, we can easily split one cluster
4484 * at a bucket boundary. So we take the last cluster of the existing
4485 * extent and split it down the middle. We move the last half of the
4486 * buckets in the last cluster of the existing extent over to the new
4487 * extent.
Tao Ma01225592008-08-18 17:38:53 +08004488 *
Joel Beckerb5c03e72008-11-25 19:58:16 -08004489 * first_bh is the buffer at prev_blkno so we can update the existing
4490 * extent's bucket count. header_bh is the bucket were we were hoping
4491 * to insert our xattr. If the bucket move places the target in the new
4492 * extent, we'll update first_bh and header_bh after modifying the old
4493 * extent.
4494 *
4495 * first_hash will be set as the 1st xe's name_hash in the new extent.
Tao Ma01225592008-08-18 17:38:53 +08004496 */
4497static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
4498 handle_t *handle,
Joel Becker41cb8142008-11-26 14:25:21 -08004499 struct ocfs2_xattr_bucket *first,
4500 struct ocfs2_xattr_bucket *target,
Tao Ma01225592008-08-18 17:38:53 +08004501 u64 new_blkno,
Tao Ma01225592008-08-18 17:38:53 +08004502 u32 num_clusters,
4503 u32 *first_hash)
4504{
Joel Beckerc58b6032008-11-26 13:36:24 -08004505 int ret;
Joel Becker41cb8142008-11-26 14:25:21 -08004506 struct super_block *sb = inode->i_sb;
4507 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
4508 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
Joel Beckerb5c03e72008-11-25 19:58:16 -08004509 int to_move = num_buckets / 2;
Joel Beckerc58b6032008-11-26 13:36:24 -08004510 u64 src_blkno;
Joel Becker41cb8142008-11-26 14:25:21 -08004511 u64 last_cluster_blkno = bucket_blkno(first) +
4512 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
Tao Ma01225592008-08-18 17:38:53 +08004513
Joel Becker41cb8142008-11-26 14:25:21 -08004514 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
4515 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
Tao Ma01225592008-08-18 17:38:53 +08004516
Tao Ma402b4182011-02-23 22:01:17 +08004517 trace_ocfs2_mv_xattr_bucket_cross_cluster(
4518 (unsigned long long)last_cluster_blkno,
4519 (unsigned long long)new_blkno);
Tao Ma01225592008-08-18 17:38:53 +08004520
Joel Becker41cb8142008-11-26 14:25:21 -08004521 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
Joel Beckerc58b6032008-11-26 13:36:24 -08004522 last_cluster_blkno, new_blkno,
4523 to_move, first_hash);
Joel Beckerb5c03e72008-11-25 19:58:16 -08004524 if (ret) {
4525 mlog_errno(ret);
4526 goto out;
4527 }
4528
Joel Beckerc58b6032008-11-26 13:36:24 -08004529 /* This is the first bucket that got moved */
4530 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
4531
Tao Ma01225592008-08-18 17:38:53 +08004532 /*
Joel Beckerc58b6032008-11-26 13:36:24 -08004533 * If the target bucket was part of the moved buckets, we need to
Joel Becker41cb8142008-11-26 14:25:21 -08004534 * update first and target.
Joel Beckerb5c03e72008-11-25 19:58:16 -08004535 */
Joel Becker41cb8142008-11-26 14:25:21 -08004536 if (bucket_blkno(target) >= src_blkno) {
Joel Beckerb5c03e72008-11-25 19:58:16 -08004537 /* Find the block for the new target bucket */
4538 src_blkno = new_blkno +
Joel Becker41cb8142008-11-26 14:25:21 -08004539 (bucket_blkno(target) - src_blkno);
4540
4541 ocfs2_xattr_bucket_relse(first);
4542 ocfs2_xattr_bucket_relse(target);
Joel Beckerb5c03e72008-11-25 19:58:16 -08004543
4544 /*
Joel Beckerc58b6032008-11-26 13:36:24 -08004545 * These shouldn't fail - the buffers are in the
Joel Beckerb5c03e72008-11-25 19:58:16 -08004546 * journal from ocfs2_cp_xattr_bucket().
4547 */
Joel Becker41cb8142008-11-26 14:25:21 -08004548 ret = ocfs2_read_xattr_bucket(first, new_blkno);
Joel Beckerc58b6032008-11-26 13:36:24 -08004549 if (ret) {
4550 mlog_errno(ret);
4551 goto out;
4552 }
Joel Becker41cb8142008-11-26 14:25:21 -08004553 ret = ocfs2_read_xattr_bucket(target, src_blkno);
4554 if (ret)
Joel Beckerb5c03e72008-11-25 19:58:16 -08004555 mlog_errno(ret);
Joel Beckerb5c03e72008-11-25 19:58:16 -08004556
Joel Beckerb5c03e72008-11-25 19:58:16 -08004557 }
4558
Tao Ma01225592008-08-18 17:38:53 +08004559out:
Tao Ma01225592008-08-18 17:38:53 +08004560 return ret;
4561}
4562
Tao Ma01225592008-08-18 17:38:53 +08004563/*
Tao Ma80bcaf32008-10-27 06:06:24 +08004564 * Find the suitable pos when we divide a bucket into 2.
4565 * We have to make sure the xattrs with the same hash value exist
4566 * in the same bucket.
4567 *
4568 * If this ocfs2_xattr_header covers more than one hash value, find a
4569 * place where the hash value changes. Try to find the most even split.
4570 * The most common case is that all entries have different hash values,
4571 * and the first check we make will find a place to split.
Tao Ma01225592008-08-18 17:38:53 +08004572 */
Tao Ma80bcaf32008-10-27 06:06:24 +08004573static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
4574{
4575 struct ocfs2_xattr_entry *entries = xh->xh_entries;
4576 int count = le16_to_cpu(xh->xh_count);
4577 int delta, middle = count / 2;
4578
4579 /*
4580 * We start at the middle. Each step gets farther away in both
4581 * directions. We therefore hit the change in hash value
4582 * nearest to the middle. Note that this loop does not execute for
4583 * count < 2.
4584 */
4585 for (delta = 0; delta < middle; delta++) {
4586 /* Let's check delta earlier than middle */
4587 if (cmp_xe(&entries[middle - delta - 1],
4588 &entries[middle - delta]))
4589 return middle - delta;
4590
4591 /* For even counts, don't walk off the end */
4592 if ((middle + delta + 1) == count)
4593 continue;
4594
4595 /* Now try delta past middle */
4596 if (cmp_xe(&entries[middle + delta],
4597 &entries[middle + delta + 1]))
4598 return middle + delta + 1;
4599 }
4600
4601 /* Every entry had the same hash */
4602 return count;
4603}
4604
4605/*
4606 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
4607 * first_hash will record the 1st hash of the new bucket.
4608 *
4609 * Normally half of the xattrs will be moved. But we have to make
4610 * sure that the xattrs with the same hash value are stored in the
4611 * same bucket. If all the xattrs in this bucket have the same hash
4612 * value, the new bucket will be initialized as an empty one and the
4613 * first_hash will be initialized as (hash_value+1).
4614 */
4615static int ocfs2_divide_xattr_bucket(struct inode *inode,
4616 handle_t *handle,
4617 u64 blk,
4618 u64 new_blk,
4619 u32 *first_hash,
4620 int new_bucket_head)
Tao Ma01225592008-08-18 17:38:53 +08004621{
4622 int ret, i;
Joel Becker199799a2009-08-14 19:04:15 -07004623 int count, start, len, name_value_len = 0, name_offset = 0;
Joel Beckerba937122008-10-24 19:13:20 -07004624 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
Tao Ma01225592008-08-18 17:38:53 +08004625 struct ocfs2_xattr_header *xh;
4626 struct ocfs2_xattr_entry *xe;
4627 int blocksize = inode->i_sb->s_blocksize;
4628
Tao Ma402b4182011-02-23 22:01:17 +08004629 trace_ocfs2_divide_xattr_bucket_begin((unsigned long long)blk,
4630 (unsigned long long)new_blk);
Tao Ma01225592008-08-18 17:38:53 +08004631
Joel Beckerba937122008-10-24 19:13:20 -07004632 s_bucket = ocfs2_xattr_bucket_new(inode);
4633 t_bucket = ocfs2_xattr_bucket_new(inode);
4634 if (!s_bucket || !t_bucket) {
4635 ret = -ENOMEM;
4636 mlog_errno(ret);
4637 goto out;
4638 }
Tao Ma01225592008-08-18 17:38:53 +08004639
Joel Beckerba937122008-10-24 19:13:20 -07004640 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
Tao Ma01225592008-08-18 17:38:53 +08004641 if (ret) {
4642 mlog_errno(ret);
4643 goto out;
4644 }
4645
Joel Beckerba937122008-10-24 19:13:20 -07004646 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
Joel Becker1224be02008-10-24 18:47:33 -07004647 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Ma01225592008-08-18 17:38:53 +08004648 if (ret) {
4649 mlog_errno(ret);
4650 goto out;
4651 }
4652
Joel Becker784b8162008-10-24 17:33:40 -07004653 /*
4654 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
4655 * there's no need to read it.
4656 */
Wengang Wang9c339252014-04-03 14:47:15 -07004657 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk, new_bucket_head);
Tao Ma01225592008-08-18 17:38:53 +08004658 if (ret) {
4659 mlog_errno(ret);
4660 goto out;
4661 }
4662
Joel Becker2b656c12008-11-25 19:00:15 -08004663 /*
4664 * Hey, if we're overwriting t_bucket, what difference does
4665 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
4666 * same part of ocfs2_cp_xattr_bucket().
4667 */
Joel Beckerba937122008-10-24 19:13:20 -07004668 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
Joel Becker1224be02008-10-24 18:47:33 -07004669 new_bucket_head ?
4670 OCFS2_JOURNAL_ACCESS_CREATE :
4671 OCFS2_JOURNAL_ACCESS_WRITE);
4672 if (ret) {
4673 mlog_errno(ret);
4674 goto out;
Tao Ma01225592008-08-18 17:38:53 +08004675 }
4676
Joel Beckerba937122008-10-24 19:13:20 -07004677 xh = bucket_xh(s_bucket);
Tao Ma80bcaf32008-10-27 06:06:24 +08004678 count = le16_to_cpu(xh->xh_count);
4679 start = ocfs2_xattr_find_divide_pos(xh);
4680
4681 if (start == count) {
4682 xe = &xh->xh_entries[start-1];
4683
4684 /*
4685 * initialized a new empty bucket here.
4686 * The hash value is set as one larger than
4687 * that of the last entry in the previous bucket.
4688 */
Joel Beckerba937122008-10-24 19:13:20 -07004689 for (i = 0; i < t_bucket->bu_blocks; i++)
4690 memset(bucket_block(t_bucket, i), 0, blocksize);
Tao Ma80bcaf32008-10-27 06:06:24 +08004691
Joel Beckerba937122008-10-24 19:13:20 -07004692 xh = bucket_xh(t_bucket);
Tao Ma80bcaf32008-10-27 06:06:24 +08004693 xh->xh_free_start = cpu_to_le16(blocksize);
4694 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
4695 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
4696
4697 goto set_num_buckets;
4698 }
4699
Tao Ma01225592008-08-18 17:38:53 +08004700 /* copy the whole bucket to the new first. */
Joel Beckerba937122008-10-24 19:13:20 -07004701 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004702
4703 /* update the new bucket. */
Joel Beckerba937122008-10-24 19:13:20 -07004704 xh = bucket_xh(t_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004705
4706 /*
4707 * Calculate the total name/value len and xh_free_start for
4708 * the old bucket first.
4709 */
4710 name_offset = OCFS2_XATTR_BUCKET_SIZE;
4711 name_value_len = 0;
4712 for (i = 0; i < start; i++) {
4713 xe = &xh->xh_entries[i];
Joel Becker199799a2009-08-14 19:04:15 -07004714 name_value_len += namevalue_size_xe(xe);
Tao Ma01225592008-08-18 17:38:53 +08004715 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
4716 name_offset = le16_to_cpu(xe->xe_name_offset);
4717 }
4718
4719 /*
4720 * Now begin the modification to the new bucket.
4721 *
4722 * In the new bucket, We just move the xattr entry to the beginning
4723 * and don't touch the name/value. So there will be some holes in the
4724 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
4725 * called.
4726 */
4727 xe = &xh->xh_entries[start];
4728 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
Tao Ma402b4182011-02-23 22:01:17 +08004729 trace_ocfs2_divide_xattr_bucket_move(len,
4730 (int)((char *)xe - (char *)xh),
4731 (int)((char *)xh->xh_entries - (char *)xh));
Tao Ma01225592008-08-18 17:38:53 +08004732 memmove((char *)xh->xh_entries, (char *)xe, len);
4733 xe = &xh->xh_entries[count - start];
4734 len = sizeof(struct ocfs2_xattr_entry) * start;
4735 memset((char *)xe, 0, len);
4736
4737 le16_add_cpu(&xh->xh_count, -start);
4738 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
4739
4740 /* Calculate xh_free_start for the new bucket. */
4741 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4742 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
4743 xe = &xh->xh_entries[i];
Tao Ma01225592008-08-18 17:38:53 +08004744 if (le16_to_cpu(xe->xe_name_offset) <
4745 le16_to_cpu(xh->xh_free_start))
4746 xh->xh_free_start = xe->xe_name_offset;
4747 }
4748
Tao Ma80bcaf32008-10-27 06:06:24 +08004749set_num_buckets:
Tao Ma01225592008-08-18 17:38:53 +08004750 /* set xh->xh_num_buckets for the new xh. */
4751 if (new_bucket_head)
4752 xh->xh_num_buckets = cpu_to_le16(1);
4753 else
4754 xh->xh_num_buckets = 0;
4755
Joel Beckerba937122008-10-24 19:13:20 -07004756 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004757
4758 /* store the first_hash of the new bucket. */
4759 if (first_hash)
4760 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
4761
4762 /*
Tao Ma80bcaf32008-10-27 06:06:24 +08004763 * Now only update the 1st block of the old bucket. If we
4764 * just added a new empty bucket, there is no need to modify
4765 * it.
Tao Ma01225592008-08-18 17:38:53 +08004766 */
Tao Ma80bcaf32008-10-27 06:06:24 +08004767 if (start == count)
4768 goto out;
4769
Joel Beckerba937122008-10-24 19:13:20 -07004770 xh = bucket_xh(s_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004771 memset(&xh->xh_entries[start], 0,
4772 sizeof(struct ocfs2_xattr_entry) * (count - start));
4773 xh->xh_count = cpu_to_le16(start);
4774 xh->xh_free_start = cpu_to_le16(name_offset);
4775 xh->xh_name_value_len = cpu_to_le16(name_value_len);
4776
Joel Beckerba937122008-10-24 19:13:20 -07004777 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004778
4779out:
Joel Beckerba937122008-10-24 19:13:20 -07004780 ocfs2_xattr_bucket_free(s_bucket);
4781 ocfs2_xattr_bucket_free(t_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004782
4783 return ret;
4784}
4785
4786/*
4787 * Copy xattr from one bucket to another bucket.
4788 *
4789 * The caller must make sure that the journal transaction
4790 * has enough space for journaling.
4791 */
4792static int ocfs2_cp_xattr_bucket(struct inode *inode,
4793 handle_t *handle,
4794 u64 s_blkno,
4795 u64 t_blkno,
4796 int t_is_new)
4797{
Joel Becker4980c6d2008-10-24 18:54:43 -07004798 int ret;
Joel Beckerba937122008-10-24 19:13:20 -07004799 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
Tao Ma01225592008-08-18 17:38:53 +08004800
4801 BUG_ON(s_blkno == t_blkno);
4802
Tao Ma402b4182011-02-23 22:01:17 +08004803 trace_ocfs2_cp_xattr_bucket((unsigned long long)s_blkno,
4804 (unsigned long long)t_blkno,
4805 t_is_new);
Tao Ma01225592008-08-18 17:38:53 +08004806
Joel Beckerba937122008-10-24 19:13:20 -07004807 s_bucket = ocfs2_xattr_bucket_new(inode);
4808 t_bucket = ocfs2_xattr_bucket_new(inode);
4809 if (!s_bucket || !t_bucket) {
4810 ret = -ENOMEM;
4811 mlog_errno(ret);
4812 goto out;
4813 }
Joel Becker92de1092008-11-25 17:06:40 -08004814
Joel Beckerba937122008-10-24 19:13:20 -07004815 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
Tao Ma01225592008-08-18 17:38:53 +08004816 if (ret)
4817 goto out;
4818
Joel Becker784b8162008-10-24 17:33:40 -07004819 /*
4820 * Even if !t_is_new, we're overwriting t_bucket. Thus,
4821 * there's no need to read it.
4822 */
Wengang Wang9c339252014-04-03 14:47:15 -07004823 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno, t_is_new);
Tao Ma01225592008-08-18 17:38:53 +08004824 if (ret)
4825 goto out;
4826
Joel Becker2b656c12008-11-25 19:00:15 -08004827 /*
4828 * Hey, if we're overwriting t_bucket, what difference does
4829 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
Joel Becker874d65a2008-11-26 13:02:18 -08004830 * cluster to fill, we came here from
4831 * ocfs2_mv_xattr_buckets(), and it is really new -
4832 * ACCESS_CREATE is required. But we also might have moved data
4833 * out of t_bucket before extending back into it.
4834 * ocfs2_add_new_xattr_bucket() can do this - its call to
4835 * ocfs2_add_new_xattr_cluster() may have created a new extent
Joel Becker2b656c12008-11-25 19:00:15 -08004836 * and copied out the end of the old extent. Then it re-extends
4837 * the old extent back to create space for new xattrs. That's
4838 * how we get here, and the bucket isn't really new.
4839 */
Joel Beckerba937122008-10-24 19:13:20 -07004840 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
Joel Becker1224be02008-10-24 18:47:33 -07004841 t_is_new ?
4842 OCFS2_JOURNAL_ACCESS_CREATE :
4843 OCFS2_JOURNAL_ACCESS_WRITE);
4844 if (ret)
4845 goto out;
Tao Ma01225592008-08-18 17:38:53 +08004846
Joel Beckerba937122008-10-24 19:13:20 -07004847 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
4848 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004849
4850out:
Joel Beckerba937122008-10-24 19:13:20 -07004851 ocfs2_xattr_bucket_free(t_bucket);
4852 ocfs2_xattr_bucket_free(s_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004853
4854 return ret;
4855}
4856
4857/*
Joel Becker874d65a2008-11-26 13:02:18 -08004858 * src_blk points to the start of an existing extent. last_blk points to
4859 * last cluster in that extent. to_blk points to a newly allocated
Joel Becker54ecb6b2008-11-26 13:18:31 -08004860 * extent. We copy the buckets from the cluster at last_blk to the new
4861 * extent. If start_bucket is non-zero, we skip that many buckets before
4862 * we start copying. The new extent's xh_num_buckets gets set to the
4863 * number of buckets we copied. The old extent's xh_num_buckets shrinks
4864 * by the same amount.
Tao Ma01225592008-08-18 17:38:53 +08004865 */
Joel Becker54ecb6b2008-11-26 13:18:31 -08004866static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
4867 u64 src_blk, u64 last_blk, u64 to_blk,
4868 unsigned int start_bucket,
4869 u32 *first_hash)
Tao Ma01225592008-08-18 17:38:53 +08004870{
4871 int i, ret, credits;
4872 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Joel Becker15d60922008-11-25 18:36:42 -08004873 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
Tao Ma01225592008-08-18 17:38:53 +08004874 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
Joel Becker15d60922008-11-25 18:36:42 -08004875 struct ocfs2_xattr_bucket *old_first, *new_first;
Tao Ma01225592008-08-18 17:38:53 +08004876
Tao Ma402b4182011-02-23 22:01:17 +08004877 trace_ocfs2_mv_xattr_buckets((unsigned long long)last_blk,
4878 (unsigned long long)to_blk);
Tao Ma01225592008-08-18 17:38:53 +08004879
Joel Becker54ecb6b2008-11-26 13:18:31 -08004880 BUG_ON(start_bucket >= num_buckets);
4881 if (start_bucket) {
4882 num_buckets -= start_bucket;
4883 last_blk += (start_bucket * blks_per_bucket);
4884 }
4885
Joel Becker15d60922008-11-25 18:36:42 -08004886 /* The first bucket of the original extent */
4887 old_first = ocfs2_xattr_bucket_new(inode);
4888 /* The first bucket of the new extent */
4889 new_first = ocfs2_xattr_bucket_new(inode);
4890 if (!old_first || !new_first) {
4891 ret = -ENOMEM;
4892 mlog_errno(ret);
4893 goto out;
4894 }
4895
Joel Becker874d65a2008-11-26 13:02:18 -08004896 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
Joel Becker15d60922008-11-25 18:36:42 -08004897 if (ret) {
4898 mlog_errno(ret);
4899 goto out;
4900 }
4901
Tao Ma01225592008-08-18 17:38:53 +08004902 /*
Joel Becker54ecb6b2008-11-26 13:18:31 -08004903 * We need to update the first bucket of the old extent and all
4904 * the buckets going to the new extent.
Tao Ma01225592008-08-18 17:38:53 +08004905 */
Tao Mac901fb02010-04-26 14:34:57 +08004906 credits = ((num_buckets + 1) * blks_per_bucket);
Tao Ma01225592008-08-18 17:38:53 +08004907 ret = ocfs2_extend_trans(handle, credits);
4908 if (ret) {
4909 mlog_errno(ret);
4910 goto out;
4911 }
4912
Joel Becker15d60922008-11-25 18:36:42 -08004913 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
4914 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Ma01225592008-08-18 17:38:53 +08004915 if (ret) {
4916 mlog_errno(ret);
4917 goto out;
4918 }
4919
4920 for (i = 0; i < num_buckets; i++) {
4921 ret = ocfs2_cp_xattr_bucket(inode, handle,
Joel Becker874d65a2008-11-26 13:02:18 -08004922 last_blk + (i * blks_per_bucket),
Joel Becker15d60922008-11-25 18:36:42 -08004923 to_blk + (i * blks_per_bucket),
4924 1);
Tao Ma01225592008-08-18 17:38:53 +08004925 if (ret) {
4926 mlog_errno(ret);
4927 goto out;
4928 }
Tao Ma01225592008-08-18 17:38:53 +08004929 }
4930
Joel Becker15d60922008-11-25 18:36:42 -08004931 /*
4932 * Get the new bucket ready before we dirty anything
4933 * (This actually shouldn't fail, because we already dirtied
4934 * it once in ocfs2_cp_xattr_bucket()).
4935 */
4936 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4937 if (ret) {
Tao Ma01225592008-08-18 17:38:53 +08004938 mlog_errno(ret);
4939 goto out;
4940 }
Joel Becker15d60922008-11-25 18:36:42 -08004941 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4942 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Ma01225592008-08-18 17:38:53 +08004943 if (ret) {
4944 mlog_errno(ret);
4945 goto out;
4946 }
4947
Joel Becker15d60922008-11-25 18:36:42 -08004948 /* Now update the headers */
4949 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4950 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
Tao Ma01225592008-08-18 17:38:53 +08004951
Joel Becker15d60922008-11-25 18:36:42 -08004952 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4953 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
Tao Ma01225592008-08-18 17:38:53 +08004954
4955 if (first_hash)
Joel Becker15d60922008-11-25 18:36:42 -08004956 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4957
Tao Ma01225592008-08-18 17:38:53 +08004958out:
Joel Becker15d60922008-11-25 18:36:42 -08004959 ocfs2_xattr_bucket_free(new_first);
4960 ocfs2_xattr_bucket_free(old_first);
Tao Ma01225592008-08-18 17:38:53 +08004961 return ret;
4962}
4963
4964/*
Tao Ma80bcaf32008-10-27 06:06:24 +08004965 * Move some xattrs in this cluster to the new cluster.
Tao Ma01225592008-08-18 17:38:53 +08004966 * This function should only be called when bucket size == cluster size.
4967 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4968 */
Tao Ma80bcaf32008-10-27 06:06:24 +08004969static int ocfs2_divide_xattr_cluster(struct inode *inode,
4970 handle_t *handle,
4971 u64 prev_blk,
4972 u64 new_blk,
4973 u32 *first_hash)
Tao Ma01225592008-08-18 17:38:53 +08004974{
4975 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
Tao Mac901fb02010-04-26 14:34:57 +08004976 int ret, credits = 2 * blk_per_bucket;
Tao Ma01225592008-08-18 17:38:53 +08004977
4978 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4979
4980 ret = ocfs2_extend_trans(handle, credits);
4981 if (ret) {
4982 mlog_errno(ret);
4983 return ret;
4984 }
4985
4986 /* Move half of the xattr in start_blk to the next bucket. */
Tao Ma80bcaf32008-10-27 06:06:24 +08004987 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4988 new_blk, first_hash, 1);
Tao Ma01225592008-08-18 17:38:53 +08004989}
4990
4991/*
4992 * Move some xattrs from the old cluster to the new one since they are not
4993 * contiguous in ocfs2 xattr tree.
4994 *
4995 * new_blk starts a new separate cluster, and we will move some xattrs from
4996 * prev_blk to it. v_start will be set as the first name hash value in this
4997 * new cluster so that it can be used as e_cpos during tree insertion and
4998 * don't collide with our original b-tree operations. first_bh and header_bh
4999 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
5000 * to extend the insert bucket.
5001 *
5002 * The problem is how much xattr should we move to the new one and when should
5003 * we update first_bh and header_bh?
5004 * 1. If cluster size > bucket size, that means the previous cluster has more
5005 * than 1 bucket, so just move half nums of bucket into the new cluster and
5006 * update the first_bh and header_bh if the insert bucket has been moved
5007 * to the new cluster.
5008 * 2. If cluster_size == bucket_size:
5009 * a) If the previous extent rec has more than one cluster and the insert
5010 * place isn't in the last cluster, copy the entire last cluster to the
5011 * new one. This time, we don't need to upate the first_bh and header_bh
5012 * since they will not be moved into the new cluster.
5013 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
5014 * the new one. And we set the extend flag to zero if the insert place is
5015 * moved into the new allocated cluster since no extend is needed.
5016 */
5017static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
5018 handle_t *handle,
Joel Becker012ee912008-11-26 14:43:31 -08005019 struct ocfs2_xattr_bucket *first,
5020 struct ocfs2_xattr_bucket *target,
Tao Ma01225592008-08-18 17:38:53 +08005021 u64 new_blk,
Tao Ma01225592008-08-18 17:38:53 +08005022 u32 prev_clusters,
5023 u32 *v_start,
5024 int *extend)
5025{
Joel Becker92cf3ad2008-11-26 14:12:09 -08005026 int ret;
Tao Ma01225592008-08-18 17:38:53 +08005027
Tao Ma402b4182011-02-23 22:01:17 +08005028 trace_ocfs2_adjust_xattr_cross_cluster(
5029 (unsigned long long)bucket_blkno(first),
5030 (unsigned long long)new_blk, prev_clusters);
Tao Ma01225592008-08-18 17:38:53 +08005031
Joel Becker41cb8142008-11-26 14:25:21 -08005032 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
Tao Ma01225592008-08-18 17:38:53 +08005033 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
5034 handle,
Joel Becker41cb8142008-11-26 14:25:21 -08005035 first, target,
Tao Ma01225592008-08-18 17:38:53 +08005036 new_blk,
Tao Ma01225592008-08-18 17:38:53 +08005037 prev_clusters,
5038 v_start);
Joel Becker012ee912008-11-26 14:43:31 -08005039 if (ret)
Joel Becker41cb8142008-11-26 14:25:21 -08005040 mlog_errno(ret);
Joel Becker41cb8142008-11-26 14:25:21 -08005041 } else {
Joel Becker92cf3ad2008-11-26 14:12:09 -08005042 /* The start of the last cluster in the first extent */
5043 u64 last_blk = bucket_blkno(first) +
5044 ((prev_clusters - 1) *
5045 ocfs2_clusters_to_blocks(inode->i_sb, 1));
Tao Ma01225592008-08-18 17:38:53 +08005046
Joel Becker012ee912008-11-26 14:43:31 -08005047 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
Joel Becker874d65a2008-11-26 13:02:18 -08005048 ret = ocfs2_mv_xattr_buckets(inode, handle,
Joel Becker92cf3ad2008-11-26 14:12:09 -08005049 bucket_blkno(first),
Joel Becker54ecb6b2008-11-26 13:18:31 -08005050 last_blk, new_blk, 0,
Tao Ma01225592008-08-18 17:38:53 +08005051 v_start);
Joel Becker012ee912008-11-26 14:43:31 -08005052 if (ret)
5053 mlog_errno(ret);
5054 } else {
Tao Ma80bcaf32008-10-27 06:06:24 +08005055 ret = ocfs2_divide_xattr_cluster(inode, handle,
5056 last_blk, new_blk,
5057 v_start);
Joel Becker012ee912008-11-26 14:43:31 -08005058 if (ret)
5059 mlog_errno(ret);
Tao Ma01225592008-08-18 17:38:53 +08005060
Joel Becker92cf3ad2008-11-26 14:12:09 -08005061 if ((bucket_blkno(target) == last_blk) && extend)
Tao Ma01225592008-08-18 17:38:53 +08005062 *extend = 0;
5063 }
5064 }
5065
5066 return ret;
5067}
5068
5069/*
5070 * Add a new cluster for xattr storage.
5071 *
5072 * If the new cluster is contiguous with the previous one, it will be
5073 * appended to the same extent record, and num_clusters will be updated.
5074 * If not, we will insert a new extent for it and move some xattrs in
5075 * the last cluster into the new allocated one.
5076 * We also need to limit the maximum size of a btree leaf, otherwise we'll
5077 * lose the benefits of hashing because we'll have to search large leaves.
5078 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
5079 * if it's bigger).
5080 *
5081 * first_bh is the first block of the previous extent rec and header_bh
5082 * indicates the bucket we will insert the new xattrs. They will be updated
5083 * when the header_bh is moved into the new cluster.
5084 */
5085static int ocfs2_add_new_xattr_cluster(struct inode *inode,
5086 struct buffer_head *root_bh,
Joel Beckered29c0c2008-11-26 15:08:44 -08005087 struct ocfs2_xattr_bucket *first,
5088 struct ocfs2_xattr_bucket *target,
Tao Ma01225592008-08-18 17:38:53 +08005089 u32 *num_clusters,
5090 u32 prev_cpos,
Tao Ma78f30c32008-11-12 08:27:00 +08005091 int *extend,
5092 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Ma01225592008-08-18 17:38:53 +08005093{
Tao Ma85db90e2008-11-12 08:27:01 +08005094 int ret;
Tao Ma01225592008-08-18 17:38:53 +08005095 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
5096 u32 prev_clusters = *num_clusters;
5097 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
5098 u64 block;
Tao Ma85db90e2008-11-12 08:27:01 +08005099 handle_t *handle = ctxt->handle;
Tao Ma01225592008-08-18 17:38:53 +08005100 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Joel Beckerf99b9b72008-08-20 19:36:33 -07005101 struct ocfs2_extent_tree et;
Tao Ma01225592008-08-18 17:38:53 +08005102
Tao Ma402b4182011-02-23 22:01:17 +08005103 trace_ocfs2_add_new_xattr_cluster_begin(
5104 (unsigned long long)OCFS2_I(inode)->ip_blkno,
5105 (unsigned long long)bucket_blkno(first),
5106 prev_cpos, prev_clusters);
Tao Ma01225592008-08-18 17:38:53 +08005107
Joel Becker5e404e92009-02-13 03:54:22 -08005108 ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh);
Joel Beckerf99b9b72008-08-20 19:36:33 -07005109
Joel Becker0cf2f762009-02-12 16:41:25 -08005110 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh,
Joel Becker84008972008-12-09 16:11:49 -08005111 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Ma01225592008-08-18 17:38:53 +08005112 if (ret < 0) {
5113 mlog_errno(ret);
5114 goto leave;
5115 }
5116
Joel Becker1ed9b772010-05-06 13:59:06 +08005117 ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, 1,
Tao Ma01225592008-08-18 17:38:53 +08005118 clusters_to_add, &bit_off, &num_bits);
5119 if (ret < 0) {
5120 if (ret != -ENOSPC)
5121 mlog_errno(ret);
5122 goto leave;
5123 }
5124
5125 BUG_ON(num_bits > clusters_to_add);
5126
5127 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
Tao Ma402b4182011-02-23 22:01:17 +08005128 trace_ocfs2_add_new_xattr_cluster((unsigned long long)block, num_bits);
Tao Ma01225592008-08-18 17:38:53 +08005129
Joel Beckered29c0c2008-11-26 15:08:44 -08005130 if (bucket_blkno(first) + (prev_clusters * bpc) == block &&
Tao Ma01225592008-08-18 17:38:53 +08005131 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
5132 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
5133 /*
5134 * If this cluster is contiguous with the old one and
5135 * adding this new cluster, we don't surpass the limit of
5136 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
5137 * initialized and used like other buckets in the previous
5138 * cluster.
5139 * So add it as a contiguous one. The caller will handle
5140 * its init process.
5141 */
5142 v_start = prev_cpos + prev_clusters;
5143 *num_clusters = prev_clusters + num_bits;
Tao Ma01225592008-08-18 17:38:53 +08005144 } else {
5145 ret = ocfs2_adjust_xattr_cross_cluster(inode,
5146 handle,
Joel Becker012ee912008-11-26 14:43:31 -08005147 first,
5148 target,
Tao Ma01225592008-08-18 17:38:53 +08005149 block,
Tao Ma01225592008-08-18 17:38:53 +08005150 prev_clusters,
5151 &v_start,
5152 extend);
5153 if (ret) {
5154 mlog_errno(ret);
5155 goto leave;
5156 }
5157 }
5158
Tao Ma402b4182011-02-23 22:01:17 +08005159 trace_ocfs2_add_new_xattr_cluster_insert((unsigned long long)block,
5160 v_start, num_bits);
Joel Beckercc79d8c2009-02-13 03:24:43 -08005161 ret = ocfs2_insert_extent(handle, &et, v_start, block,
Tao Ma78f30c32008-11-12 08:27:00 +08005162 num_bits, 0, ctxt->meta_ac);
Tao Ma01225592008-08-18 17:38:53 +08005163 if (ret < 0) {
5164 mlog_errno(ret);
5165 goto leave;
5166 }
5167
Joel Beckerec20cec2010-03-19 14:13:52 -07005168 ocfs2_journal_dirty(handle, root_bh);
Tao Ma01225592008-08-18 17:38:53 +08005169
5170leave:
Tao Ma01225592008-08-18 17:38:53 +08005171 return ret;
5172}
5173
5174/*
Joel Becker92de1092008-11-25 17:06:40 -08005175 * We are given an extent. 'first' is the bucket at the very front of
5176 * the extent. The extent has space for an additional bucket past
5177 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
5178 * of the target bucket. We wish to shift every bucket past the target
5179 * down one, filling in that additional space. When we get back to the
5180 * target, we split the target between itself and the now-empty bucket
5181 * at target+1 (aka, target_blkno + blks_per_bucket).
Tao Ma01225592008-08-18 17:38:53 +08005182 */
5183static int ocfs2_extend_xattr_bucket(struct inode *inode,
Tao Ma85db90e2008-11-12 08:27:01 +08005184 handle_t *handle,
Joel Becker92de1092008-11-25 17:06:40 -08005185 struct ocfs2_xattr_bucket *first,
5186 u64 target_blk,
Tao Ma01225592008-08-18 17:38:53 +08005187 u32 num_clusters)
5188{
5189 int ret, credits;
5190 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5191 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
Joel Becker92de1092008-11-25 17:06:40 -08005192 u64 end_blk;
5193 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
Tao Ma01225592008-08-18 17:38:53 +08005194
Tao Ma402b4182011-02-23 22:01:17 +08005195 trace_ocfs2_extend_xattr_bucket((unsigned long long)target_blk,
5196 (unsigned long long)bucket_blkno(first),
5197 num_clusters, new_bucket);
Tao Ma01225592008-08-18 17:38:53 +08005198
Joel Becker92de1092008-11-25 17:06:40 -08005199 /* The extent must have room for an additional bucket */
5200 BUG_ON(new_bucket >=
5201 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
Tao Ma01225592008-08-18 17:38:53 +08005202
Joel Becker92de1092008-11-25 17:06:40 -08005203 /* end_blk points to the last existing bucket */
5204 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
Tao Ma01225592008-08-18 17:38:53 +08005205
5206 /*
Joel Becker92de1092008-11-25 17:06:40 -08005207 * end_blk is the start of the last existing bucket.
5208 * Thus, (end_blk - target_blk) covers the target bucket and
5209 * every bucket after it up to, but not including, the last
5210 * existing bucket. Then we add the last existing bucket, the
5211 * new bucket, and the first bucket (3 * blk_per_bucket).
Tao Ma01225592008-08-18 17:38:53 +08005212 */
Tao Mac901fb02010-04-26 14:34:57 +08005213 credits = (end_blk - target_blk) + (3 * blk_per_bucket);
Tao Ma85db90e2008-11-12 08:27:01 +08005214 ret = ocfs2_extend_trans(handle, credits);
5215 if (ret) {
Tao Ma01225592008-08-18 17:38:53 +08005216 mlog_errno(ret);
5217 goto out;
5218 }
5219
Joel Becker92de1092008-11-25 17:06:40 -08005220 ret = ocfs2_xattr_bucket_journal_access(handle, first,
5221 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Ma01225592008-08-18 17:38:53 +08005222 if (ret) {
5223 mlog_errno(ret);
Tao Ma85db90e2008-11-12 08:27:01 +08005224 goto out;
Tao Ma01225592008-08-18 17:38:53 +08005225 }
5226
Joel Becker92de1092008-11-25 17:06:40 -08005227 while (end_blk != target_blk) {
Tao Ma01225592008-08-18 17:38:53 +08005228 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
5229 end_blk + blk_per_bucket, 0);
5230 if (ret)
Tao Ma85db90e2008-11-12 08:27:01 +08005231 goto out;
Tao Ma01225592008-08-18 17:38:53 +08005232 end_blk -= blk_per_bucket;
5233 }
5234
Joel Becker92de1092008-11-25 17:06:40 -08005235 /* Move half of the xattr in target_blkno to the next bucket. */
5236 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
5237 target_blk + blk_per_bucket, NULL, 0);
Tao Ma01225592008-08-18 17:38:53 +08005238
Joel Becker92de1092008-11-25 17:06:40 -08005239 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
5240 ocfs2_xattr_bucket_journal_dirty(handle, first);
Tao Ma01225592008-08-18 17:38:53 +08005241
Tao Ma01225592008-08-18 17:38:53 +08005242out:
5243 return ret;
5244}
5245
5246/*
Joel Becker91f20332008-11-26 15:25:41 -08005247 * Add new xattr bucket in an extent record and adjust the buckets
5248 * accordingly. xb_bh is the ocfs2_xattr_block, and target is the
5249 * bucket we want to insert into.
Tao Ma01225592008-08-18 17:38:53 +08005250 *
Joel Becker91f20332008-11-26 15:25:41 -08005251 * In the easy case, we will move all the buckets after target down by
5252 * one. Half of target's xattrs will be moved to the next bucket.
5253 *
5254 * If current cluster is full, we'll allocate a new one. This may not
5255 * be contiguous. The underlying calls will make sure that there is
5256 * space for the insert, shifting buckets around if necessary.
5257 * 'target' may be moved by those calls.
Tao Ma01225592008-08-18 17:38:53 +08005258 */
5259static int ocfs2_add_new_xattr_bucket(struct inode *inode,
5260 struct buffer_head *xb_bh,
Joel Becker91f20332008-11-26 15:25:41 -08005261 struct ocfs2_xattr_bucket *target,
Tao Ma78f30c32008-11-12 08:27:00 +08005262 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Ma01225592008-08-18 17:38:53 +08005263{
Tao Ma01225592008-08-18 17:38:53 +08005264 struct ocfs2_xattr_block *xb =
5265 (struct ocfs2_xattr_block *)xb_bh->b_data;
5266 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
5267 struct ocfs2_extent_list *el = &xb_root->xt_list;
Joel Becker91f20332008-11-26 15:25:41 -08005268 u32 name_hash =
5269 le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash);
Joel Beckered29c0c2008-11-26 15:08:44 -08005270 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Tao Ma01225592008-08-18 17:38:53 +08005271 int ret, num_buckets, extend = 1;
5272 u64 p_blkno;
5273 u32 e_cpos, num_clusters;
Joel Becker92de1092008-11-25 17:06:40 -08005274 /* The bucket at the front of the extent */
Joel Becker91f20332008-11-26 15:25:41 -08005275 struct ocfs2_xattr_bucket *first;
Tao Ma01225592008-08-18 17:38:53 +08005276
Tao Ma402b4182011-02-23 22:01:17 +08005277 trace_ocfs2_add_new_xattr_bucket(
5278 (unsigned long long)bucket_blkno(target));
Tao Ma01225592008-08-18 17:38:53 +08005279
Joel Beckered29c0c2008-11-26 15:08:44 -08005280 /* The first bucket of the original extent */
Joel Becker92de1092008-11-25 17:06:40 -08005281 first = ocfs2_xattr_bucket_new(inode);
Joel Becker91f20332008-11-26 15:25:41 -08005282 if (!first) {
Joel Becker92de1092008-11-25 17:06:40 -08005283 ret = -ENOMEM;
5284 mlog_errno(ret);
5285 goto out;
5286 }
5287
Tao Ma01225592008-08-18 17:38:53 +08005288 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
5289 &num_clusters, el);
5290 if (ret) {
5291 mlog_errno(ret);
5292 goto out;
5293 }
5294
Joel Beckered29c0c2008-11-26 15:08:44 -08005295 ret = ocfs2_read_xattr_bucket(first, p_blkno);
5296 if (ret) {
5297 mlog_errno(ret);
5298 goto out;
5299 }
5300
Tao Ma01225592008-08-18 17:38:53 +08005301 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
Joel Beckered29c0c2008-11-26 15:08:44 -08005302 if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) {
5303 /*
5304 * This can move first+target if the target bucket moves
5305 * to the new extent.
5306 */
Tao Ma01225592008-08-18 17:38:53 +08005307 ret = ocfs2_add_new_xattr_cluster(inode,
5308 xb_bh,
Joel Beckered29c0c2008-11-26 15:08:44 -08005309 first,
5310 target,
Tao Ma01225592008-08-18 17:38:53 +08005311 &num_clusters,
5312 e_cpos,
Tao Ma78f30c32008-11-12 08:27:00 +08005313 &extend,
5314 ctxt);
Tao Ma01225592008-08-18 17:38:53 +08005315 if (ret) {
5316 mlog_errno(ret);
5317 goto out;
5318 }
5319 }
5320
Joel Becker92de1092008-11-25 17:06:40 -08005321 if (extend) {
Tao Ma01225592008-08-18 17:38:53 +08005322 ret = ocfs2_extend_xattr_bucket(inode,
Tao Ma85db90e2008-11-12 08:27:01 +08005323 ctxt->handle,
Joel Beckered29c0c2008-11-26 15:08:44 -08005324 first,
5325 bucket_blkno(target),
Tao Ma01225592008-08-18 17:38:53 +08005326 num_clusters);
Joel Becker92de1092008-11-25 17:06:40 -08005327 if (ret)
5328 mlog_errno(ret);
5329 }
5330
Tao Ma01225592008-08-18 17:38:53 +08005331out:
Joel Becker92de1092008-11-25 17:06:40 -08005332 ocfs2_xattr_bucket_free(first);
Joel Beckered29c0c2008-11-26 15:08:44 -08005333
Tao Ma01225592008-08-18 17:38:53 +08005334 return ret;
5335}
5336
Tao Ma01225592008-08-18 17:38:53 +08005337/*
Tao Ma01225592008-08-18 17:38:53 +08005338 * Truncate the specified xe_off entry in xattr bucket.
5339 * bucket is indicated by header_bh and len is the new length.
5340 * Both the ocfs2_xattr_value_root and the entry will be updated here.
5341 *
5342 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
5343 */
5344static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
Joel Becker548b0f22008-11-24 19:32:13 -08005345 struct ocfs2_xattr_bucket *bucket,
Tao Ma01225592008-08-18 17:38:53 +08005346 int xe_off,
Tao Ma78f30c32008-11-12 08:27:00 +08005347 int len,
5348 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Ma01225592008-08-18 17:38:53 +08005349{
5350 int ret, offset;
5351 u64 value_blk;
Tao Ma01225592008-08-18 17:38:53 +08005352 struct ocfs2_xattr_entry *xe;
Joel Becker548b0f22008-11-24 19:32:13 -08005353 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
Tao Ma01225592008-08-18 17:38:53 +08005354 size_t blocksize = inode->i_sb->s_blocksize;
Joel Beckerb3e5d372008-12-09 15:01:04 -08005355 struct ocfs2_xattr_value_buf vb = {
5356 .vb_access = ocfs2_journal_access,
5357 };
Tao Ma01225592008-08-18 17:38:53 +08005358
5359 xe = &xh->xh_entries[xe_off];
5360
5361 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
5362
5363 offset = le16_to_cpu(xe->xe_name_offset) +
5364 OCFS2_XATTR_SIZE(xe->xe_name_len);
5365
5366 value_blk = offset / blocksize;
5367
5368 /* We don't allow ocfs2_xattr_value to be stored in different block. */
5369 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
Tao Ma01225592008-08-18 17:38:53 +08005370
Joel Beckerb3e5d372008-12-09 15:01:04 -08005371 vb.vb_bh = bucket->bu_bhs[value_blk];
5372 BUG_ON(!vb.vb_bh);
Tao Ma01225592008-08-18 17:38:53 +08005373
Joel Beckerb3e5d372008-12-09 15:01:04 -08005374 vb.vb_xv = (struct ocfs2_xattr_value_root *)
5375 (vb.vb_bh->b_data + offset % blocksize);
Tao Ma01225592008-08-18 17:38:53 +08005376
Joel Becker548b0f22008-11-24 19:32:13 -08005377 /*
5378 * From here on out we have to dirty the bucket. The generic
5379 * value calls only modify one of the bucket's bhs, but we need
5380 * to send the bucket at once. So if they error, they *could* have
5381 * modified something. We have to assume they did, and dirty
5382 * the whole bucket. This leaves us in a consistent state.
5383 */
Tao Ma402b4182011-02-23 22:01:17 +08005384 trace_ocfs2_xattr_bucket_value_truncate(
5385 (unsigned long long)bucket_blkno(bucket), xe_off, len);
Joel Beckerb3e5d372008-12-09 15:01:04 -08005386 ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt);
Tao Ma01225592008-08-18 17:38:53 +08005387 if (ret) {
5388 mlog_errno(ret);
Tao Ma554e7f92009-01-08 08:21:43 +08005389 goto out;
5390 }
5391
5392 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
5393 OCFS2_JOURNAL_ACCESS_WRITE);
5394 if (ret) {
5395 mlog_errno(ret);
5396 goto out;
Tao Ma01225592008-08-18 17:38:53 +08005397 }
5398
Joel Becker548b0f22008-11-24 19:32:13 -08005399 xe->xe_value_size = cpu_to_le64(len);
5400
Joel Becker548b0f22008-11-24 19:32:13 -08005401 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
Tao Ma01225592008-08-18 17:38:53 +08005402
5403out:
Tao Ma01225592008-08-18 17:38:53 +08005404 return ret;
5405}
5406
Tao Ma01225592008-08-18 17:38:53 +08005407static int ocfs2_rm_xattr_cluster(struct inode *inode,
5408 struct buffer_head *root_bh,
5409 u64 blkno,
5410 u32 cpos,
Tao Ma47bca492009-08-18 11:43:42 +08005411 u32 len,
5412 void *para)
Tao Ma01225592008-08-18 17:38:53 +08005413{
5414 int ret;
5415 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5416 struct inode *tl_inode = osb->osb_tl_inode;
5417 handle_t *handle;
5418 struct ocfs2_xattr_block *xb =
5419 (struct ocfs2_xattr_block *)root_bh->b_data;
Tao Ma01225592008-08-18 17:38:53 +08005420 struct ocfs2_alloc_context *meta_ac = NULL;
5421 struct ocfs2_cached_dealloc_ctxt dealloc;
Joel Beckerf99b9b72008-08-20 19:36:33 -07005422 struct ocfs2_extent_tree et;
5423
Tao Ma47bca492009-08-18 11:43:42 +08005424 ret = ocfs2_iterate_xattr_buckets(inode, blkno, len,
Tao Mace9c5a52009-08-18 11:43:59 +08005425 ocfs2_delete_xattr_in_bucket, para);
Tao Ma47bca492009-08-18 11:43:42 +08005426 if (ret) {
5427 mlog_errno(ret);
5428 return ret;
5429 }
5430
Joel Becker5e404e92009-02-13 03:54:22 -08005431 ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh);
Tao Ma01225592008-08-18 17:38:53 +08005432
5433 ocfs2_init_dealloc_ctxt(&dealloc);
5434
Tao Ma402b4182011-02-23 22:01:17 +08005435 trace_ocfs2_rm_xattr_cluster(
5436 (unsigned long long)OCFS2_I(inode)->ip_blkno,
5437 (unsigned long long)blkno, cpos, len);
Tao Ma01225592008-08-18 17:38:53 +08005438
Joel Becker8cb471e2009-02-10 20:00:41 -08005439 ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno,
5440 len);
Tao Ma01225592008-08-18 17:38:53 +08005441
Joel Beckerf99b9b72008-08-20 19:36:33 -07005442 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
Tao Ma01225592008-08-18 17:38:53 +08005443 if (ret) {
5444 mlog_errno(ret);
5445 return ret;
5446 }
5447
Al Viro59551022016-01-22 15:40:57 -05005448 inode_lock(tl_inode);
Tao Ma01225592008-08-18 17:38:53 +08005449
5450 if (ocfs2_truncate_log_needs_flush(osb)) {
5451 ret = __ocfs2_flush_truncate_log(osb);
5452 if (ret < 0) {
5453 mlog_errno(ret);
5454 goto out;
5455 }
5456 }
5457
Jan Karaa90714c2008-10-09 19:38:40 +02005458 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
Tao Mad3264792008-10-24 07:57:28 +08005459 if (IS_ERR(handle)) {
Tao Ma01225592008-08-18 17:38:53 +08005460 ret = -ENOMEM;
5461 mlog_errno(ret);
5462 goto out;
5463 }
5464
Joel Becker0cf2f762009-02-12 16:41:25 -08005465 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh,
Joel Becker84008972008-12-09 16:11:49 -08005466 OCFS2_JOURNAL_ACCESS_WRITE);
Tao Ma01225592008-08-18 17:38:53 +08005467 if (ret) {
5468 mlog_errno(ret);
5469 goto out_commit;
5470 }
5471
Joel Beckerdbdcf6a2009-02-13 03:41:26 -08005472 ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac,
Joel Beckerf99b9b72008-08-20 19:36:33 -07005473 &dealloc);
Tao Ma01225592008-08-18 17:38:53 +08005474 if (ret) {
5475 mlog_errno(ret);
5476 goto out_commit;
5477 }
5478
5479 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
Joel Beckerec20cec2010-03-19 14:13:52 -07005480 ocfs2_journal_dirty(handle, root_bh);
Tao Ma01225592008-08-18 17:38:53 +08005481
5482 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
5483 if (ret)
5484 mlog_errno(ret);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -07005485 ocfs2_update_inode_fsync_trans(handle, inode, 0);
Tao Ma01225592008-08-18 17:38:53 +08005486
5487out_commit:
5488 ocfs2_commit_trans(osb, handle);
5489out:
5490 ocfs2_schedule_truncate_log_flush(osb, 1);
5491
Al Viro59551022016-01-22 15:40:57 -05005492 inode_unlock(tl_inode);
Tao Ma01225592008-08-18 17:38:53 +08005493
5494 if (meta_ac)
5495 ocfs2_free_alloc_context(meta_ac);
5496
5497 ocfs2_run_deallocs(osb, &dealloc);
5498
5499 return ret;
5500}
5501
Tao Ma01225592008-08-18 17:38:53 +08005502/*
Tao Ma80bcaf32008-10-27 06:06:24 +08005503 * check whether the xattr bucket is filled up with the same hash value.
5504 * If we want to insert the xattr with the same hash, return -ENOSPC.
5505 * If we want to insert a xattr with different hash value, go ahead
5506 * and ocfs2_divide_xattr_bucket will handle this.
5507 */
Tao Ma01225592008-08-18 17:38:53 +08005508static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
Tao Ma80bcaf32008-10-27 06:06:24 +08005509 struct ocfs2_xattr_bucket *bucket,
5510 const char *name)
Tao Ma01225592008-08-18 17:38:53 +08005511{
Joel Becker3e632942008-10-24 17:04:49 -07005512 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
Tao Ma80bcaf32008-10-27 06:06:24 +08005513 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
5514
5515 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
5516 return 0;
Tao Ma01225592008-08-18 17:38:53 +08005517
5518 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
5519 xh->xh_entries[0].xe_name_hash) {
5520 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
5521 "hash = %u\n",
Joel Becker9c7759a2008-10-24 16:21:03 -07005522 (unsigned long long)bucket_blkno(bucket),
Tao Ma01225592008-08-18 17:38:53 +08005523 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
5524 return -ENOSPC;
5525 }
5526
5527 return 0;
5528}
5529
Joel Beckerc5d95df2009-08-18 21:03:24 -07005530/*
5531 * Try to set the entry in the current bucket. If we fail, the caller
5532 * will handle getting us another bucket.
5533 */
5534static int ocfs2_xattr_set_entry_bucket(struct inode *inode,
5535 struct ocfs2_xattr_info *xi,
5536 struct ocfs2_xattr_search *xs,
5537 struct ocfs2_xattr_set_ctxt *ctxt)
5538{
5539 int ret;
5540 struct ocfs2_xa_loc loc;
5541
Tao Ma402b4182011-02-23 22:01:17 +08005542 trace_ocfs2_xattr_set_entry_bucket(xi->xi_name);
Joel Beckerc5d95df2009-08-18 21:03:24 -07005543
5544 ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
5545 xs->not_found ? NULL : xs->here);
5546 ret = ocfs2_xa_set(&loc, xi, ctxt);
5547 if (!ret) {
5548 xs->here = loc.xl_entry;
5549 goto out;
5550 }
5551 if (ret != -ENOSPC) {
5552 mlog_errno(ret);
5553 goto out;
5554 }
5555
5556 /* Ok, we need space. Let's try defragmenting the bucket. */
5557 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5558 xs->bucket);
5559 if (ret) {
5560 mlog_errno(ret);
5561 goto out;
5562 }
5563
5564 ret = ocfs2_xa_set(&loc, xi, ctxt);
5565 if (!ret) {
5566 xs->here = loc.xl_entry;
5567 goto out;
5568 }
5569 if (ret != -ENOSPC)
5570 mlog_errno(ret);
5571
5572
5573out:
Joel Beckerc5d95df2009-08-18 21:03:24 -07005574 return ret;
5575}
5576
Tao Ma01225592008-08-18 17:38:53 +08005577static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
5578 struct ocfs2_xattr_info *xi,
Tao Ma78f30c32008-11-12 08:27:00 +08005579 struct ocfs2_xattr_search *xs,
5580 struct ocfs2_xattr_set_ctxt *ctxt)
Tao Ma01225592008-08-18 17:38:53 +08005581{
Joel Beckerc5d95df2009-08-18 21:03:24 -07005582 int ret;
Tao Ma01225592008-08-18 17:38:53 +08005583
Tao Ma402b4182011-02-23 22:01:17 +08005584 trace_ocfs2_xattr_set_entry_index_block(xi->xi_name);
Tao Ma01225592008-08-18 17:38:53 +08005585
Joel Beckerc5d95df2009-08-18 21:03:24 -07005586 ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
5587 if (!ret)
5588 goto out;
5589 if (ret != -ENOSPC) {
5590 mlog_errno(ret);
5591 goto out;
Tao Ma01225592008-08-18 17:38:53 +08005592 }
5593
Joel Beckerc5d95df2009-08-18 21:03:24 -07005594 /* Ack, need more space. Let's try to get another bucket! */
5595
Tao Ma01225592008-08-18 17:38:53 +08005596 /*
Joel Beckerc5d95df2009-08-18 21:03:24 -07005597 * We do not allow for overlapping ranges between buckets. And
5598 * the maximum number of collisions we will allow for then is
5599 * one bucket's worth, so check it here whether we need to
5600 * add a new bucket for the insert.
Tao Ma01225592008-08-18 17:38:53 +08005601 */
Joel Beckerc5d95df2009-08-18 21:03:24 -07005602 ret = ocfs2_check_xattr_bucket_collision(inode,
Joel Becker91f20332008-11-26 15:25:41 -08005603 xs->bucket,
Joel Beckerc5d95df2009-08-18 21:03:24 -07005604 xi->xi_name);
5605 if (ret) {
5606 mlog_errno(ret);
5607 goto out;
Tao Ma01225592008-08-18 17:38:53 +08005608 }
5609
Joel Beckerc5d95df2009-08-18 21:03:24 -07005610 ret = ocfs2_add_new_xattr_bucket(inode,
5611 xs->xattr_bh,
5612 xs->bucket,
5613 ctxt);
5614 if (ret) {
5615 mlog_errno(ret);
5616 goto out;
5617 }
5618
5619 /*
5620 * ocfs2_add_new_xattr_bucket() will have updated
5621 * xs->bucket if it moved, but it will not have updated
5622 * any of the other search fields. Thus, we drop it and
5623 * re-search. Everything should be cached, so it'll be
5624 * quick.
5625 */
5626 ocfs2_xattr_bucket_relse(xs->bucket);
5627 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5628 xi->xi_name_index,
5629 xi->xi_name, xs);
5630 if (ret && ret != -ENODATA)
5631 goto out;
5632 xs->not_found = ret;
5633
5634 /* Ok, we have a new bucket, let's try again */
5635 ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
5636 if (ret && (ret != -ENOSPC))
5637 mlog_errno(ret);
5638
Tao Ma01225592008-08-18 17:38:53 +08005639out:
Tao Ma01225592008-08-18 17:38:53 +08005640 return ret;
5641}
Tao Maa3944252008-08-18 17:38:54 +08005642
5643static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5644 struct ocfs2_xattr_bucket *bucket,
5645 void *para)
5646{
Tao Mace9c5a52009-08-18 11:43:59 +08005647 int ret = 0, ref_credits;
Joel Becker3e632942008-10-24 17:04:49 -07005648 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
Tao Maa3944252008-08-18 17:38:54 +08005649 u16 i;
5650 struct ocfs2_xattr_entry *xe;
Tao Ma78f30c32008-11-12 08:27:00 +08005651 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5652 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
Joel Becker548b0f22008-11-24 19:32:13 -08005653 int credits = ocfs2_remove_extent_credits(osb->sb) +
5654 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
Tao Mace9c5a52009-08-18 11:43:59 +08005655 struct ocfs2_xattr_value_root *xv;
5656 struct ocfs2_rm_xattr_bucket_para *args =
5657 (struct ocfs2_rm_xattr_bucket_para *)para;
Tao Ma78f30c32008-11-12 08:27:00 +08005658
5659 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
Tao Maa3944252008-08-18 17:38:54 +08005660
5661 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5662 xe = &xh->xh_entries[i];
5663 if (ocfs2_xattr_is_local(xe))
5664 continue;
5665
Tao Mace9c5a52009-08-18 11:43:59 +08005666 ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket,
5667 i, &xv, NULL);
Joseph Qi023d4ea2015-04-14 15:43:33 -07005668 if (ret) {
5669 mlog_errno(ret);
5670 break;
5671 }
Tao Mace9c5a52009-08-18 11:43:59 +08005672
5673 ret = ocfs2_lock_xattr_remove_allocators(inode, xv,
5674 args->ref_ci,
5675 args->ref_root_bh,
5676 &ctxt.meta_ac,
5677 &ref_credits);
5678
5679 ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits);
Tao Ma88c3b062008-12-11 08:54:11 +08005680 if (IS_ERR(ctxt.handle)) {
5681 ret = PTR_ERR(ctxt.handle);
5682 mlog_errno(ret);
5683 break;
5684 }
5685
Joel Becker548b0f22008-11-24 19:32:13 -08005686 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
Tao Ma78f30c32008-11-12 08:27:00 +08005687 i, 0, &ctxt);
Tao Ma88c3b062008-12-11 08:54:11 +08005688
5689 ocfs2_commit_trans(osb, ctxt.handle);
Tao Mace9c5a52009-08-18 11:43:59 +08005690 if (ctxt.meta_ac) {
5691 ocfs2_free_alloc_context(ctxt.meta_ac);
5692 ctxt.meta_ac = NULL;
5693 }
Tao Maa3944252008-08-18 17:38:54 +08005694 if (ret) {
5695 mlog_errno(ret);
5696 break;
5697 }
5698 }
5699
Tao Mace9c5a52009-08-18 11:43:59 +08005700 if (ctxt.meta_ac)
5701 ocfs2_free_alloc_context(ctxt.meta_ac);
Tao Ma78f30c32008-11-12 08:27:00 +08005702 ocfs2_schedule_truncate_log_flush(osb, 1);
5703 ocfs2_run_deallocs(osb, &ctxt.dealloc);
Tao Maa3944252008-08-18 17:38:54 +08005704 return ret;
5705}
5706
Mark Fasheh99219ae2008-10-07 14:52:59 -07005707/*
Tao Ma492a8a32009-08-18 11:43:17 +08005708 * Whenever we modify a xattr value root in the bucket(e.g, CoW
5709 * or change the extent record flag), we need to recalculate
5710 * the metaecc for the whole bucket. So it is done here.
5711 *
5712 * Note:
5713 * We have to give the extra credits for the caller.
5714 */
5715static int ocfs2_xattr_bucket_post_refcount(struct inode *inode,
5716 handle_t *handle,
5717 void *para)
5718{
5719 int ret;
5720 struct ocfs2_xattr_bucket *bucket =
5721 (struct ocfs2_xattr_bucket *)para;
5722
5723 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
5724 OCFS2_JOURNAL_ACCESS_WRITE);
5725 if (ret) {
5726 mlog_errno(ret);
5727 return ret;
5728 }
5729
5730 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
5731
5732 return 0;
5733}
5734
5735/*
5736 * Special action we need if the xattr value is refcounted.
5737 *
5738 * 1. If the xattr is refcounted, lock the tree.
5739 * 2. CoW the xattr if we are setting the new value and the value
5740 * will be stored outside.
5741 * 3. In other case, decrease_refcount will work for us, so just
5742 * lock the refcount tree, calculate the meta and credits is OK.
5743 *
5744 * We have to do CoW before ocfs2_init_xattr_set_ctxt since
5745 * currently CoW is a completed transaction, while this function
5746 * will also lock the allocators and let us deadlock. So we will
5747 * CoW the whole xattr value.
5748 */
5749static int ocfs2_prepare_refcount_xattr(struct inode *inode,
5750 struct ocfs2_dinode *di,
5751 struct ocfs2_xattr_info *xi,
5752 struct ocfs2_xattr_search *xis,
5753 struct ocfs2_xattr_search *xbs,
5754 struct ocfs2_refcount_tree **ref_tree,
5755 int *meta_add,
5756 int *credits)
5757{
5758 int ret = 0;
5759 struct ocfs2_xattr_block *xb;
5760 struct ocfs2_xattr_entry *xe;
5761 char *base;
5762 u32 p_cluster, num_clusters;
5763 unsigned int ext_flags;
5764 int name_offset, name_len;
5765 struct ocfs2_xattr_value_buf vb;
5766 struct ocfs2_xattr_bucket *bucket = NULL;
5767 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5768 struct ocfs2_post_refcount refcount;
5769 struct ocfs2_post_refcount *p = NULL;
5770 struct buffer_head *ref_root_bh = NULL;
5771
5772 if (!xis->not_found) {
5773 xe = xis->here;
5774 name_offset = le16_to_cpu(xe->xe_name_offset);
5775 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
5776 base = xis->base;
5777 vb.vb_bh = xis->inode_bh;
5778 vb.vb_access = ocfs2_journal_access_di;
5779 } else {
5780 int i, block_off = 0;
5781 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
5782 xe = xbs->here;
5783 name_offset = le16_to_cpu(xe->xe_name_offset);
5784 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
5785 i = xbs->here - xbs->header->xh_entries;
5786
5787 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
Tao Mafd68a892009-08-18 11:43:21 +08005788 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
Tao Ma492a8a32009-08-18 11:43:17 +08005789 bucket_xh(xbs->bucket),
5790 i, &block_off,
5791 &name_offset);
5792 if (ret) {
5793 mlog_errno(ret);
5794 goto out;
5795 }
5796 base = bucket_block(xbs->bucket, block_off);
5797 vb.vb_bh = xbs->bucket->bu_bhs[block_off];
5798 vb.vb_access = ocfs2_journal_access;
5799
5800 if (ocfs2_meta_ecc(osb)) {
5801 /*create parameters for ocfs2_post_refcount. */
5802 bucket = xbs->bucket;
5803 refcount.credits = bucket->bu_blocks;
5804 refcount.para = bucket;
5805 refcount.func =
5806 ocfs2_xattr_bucket_post_refcount;
5807 p = &refcount;
5808 }
5809 } else {
5810 base = xbs->base;
5811 vb.vb_bh = xbs->xattr_bh;
5812 vb.vb_access = ocfs2_journal_access_xb;
5813 }
5814 }
5815
5816 if (ocfs2_xattr_is_local(xe))
5817 goto out;
5818
5819 vb.vb_xv = (struct ocfs2_xattr_value_root *)
5820 (base + name_offset + name_len);
5821
5822 ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster,
5823 &num_clusters, &vb.vb_xv->xr_list,
5824 &ext_flags);
5825 if (ret) {
5826 mlog_errno(ret);
5827 goto out;
5828 }
5829
5830 /*
5831 * We just need to check the 1st extent record, since we always
5832 * CoW the whole xattr. So there shouldn't be a xattr with
5833 * some REFCOUNT extent recs after the 1st one.
5834 */
5835 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
5836 goto out;
5837
5838 ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc),
5839 1, ref_tree, &ref_root_bh);
5840 if (ret) {
5841 mlog_errno(ret);
5842 goto out;
5843 }
5844
5845 /*
5846 * If we are deleting the xattr or the new size will be stored inside,
5847 * cool, leave it there, the xattr truncate process will remove them
5848 * for us(it still needs the refcount tree lock and the meta, credits).
5849 * And the worse case is that every cluster truncate will split the
5850 * refcount tree, and make the original extent become 3. So we will need
5851 * 2 * cluster more extent recs at most.
5852 */
Joel Becker6b240ff2009-08-14 18:02:52 -07005853 if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) {
Tao Ma492a8a32009-08-18 11:43:17 +08005854
5855 ret = ocfs2_refcounted_xattr_delete_need(inode,
5856 &(*ref_tree)->rf_ci,
5857 ref_root_bh, vb.vb_xv,
5858 meta_add, credits);
5859 if (ret)
5860 mlog_errno(ret);
5861 goto out;
5862 }
5863
5864 ret = ocfs2_refcount_cow_xattr(inode, di, &vb,
5865 *ref_tree, ref_root_bh, 0,
5866 le32_to_cpu(vb.vb_xv->xr_clusters), p);
5867 if (ret)
5868 mlog_errno(ret);
5869
5870out:
5871 brelse(ref_root_bh);
5872 return ret;
5873}
5874
5875/*
Tao Ma01292412009-09-21 13:04:19 +08005876 * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root.
5877 * The physical clusters will be added to refcount tree.
5878 */
5879static int ocfs2_xattr_value_attach_refcount(struct inode *inode,
5880 struct ocfs2_xattr_value_root *xv,
5881 struct ocfs2_extent_tree *value_et,
5882 struct ocfs2_caching_info *ref_ci,
5883 struct buffer_head *ref_root_bh,
5884 struct ocfs2_cached_dealloc_ctxt *dealloc,
5885 struct ocfs2_post_refcount *refcount)
5886{
5887 int ret = 0;
5888 u32 clusters = le32_to_cpu(xv->xr_clusters);
5889 u32 cpos, p_cluster, num_clusters;
5890 struct ocfs2_extent_list *el = &xv->xr_list;
5891 unsigned int ext_flags;
5892
5893 cpos = 0;
5894 while (cpos < clusters) {
5895 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
5896 &num_clusters, el, &ext_flags);
Joseph Qi17caf952013-09-11 14:19:55 -07005897 if (ret) {
5898 mlog_errno(ret);
5899 break;
5900 }
Tao Ma01292412009-09-21 13:04:19 +08005901
5902 cpos += num_clusters;
5903 if ((ext_flags & OCFS2_EXT_REFCOUNTED))
5904 continue;
5905
5906 BUG_ON(!p_cluster);
5907
5908 ret = ocfs2_add_refcount_flag(inode, value_et,
5909 ref_ci, ref_root_bh,
5910 cpos - num_clusters,
5911 p_cluster, num_clusters,
5912 dealloc, refcount);
5913 if (ret) {
5914 mlog_errno(ret);
5915 break;
5916 }
5917 }
5918
5919 return ret;
5920}
5921
5922/*
5923 * Given a normal ocfs2_xattr_header, refcount all the entries which
5924 * have value stored outside.
5925 * Used for xattrs stored in inode and ocfs2_xattr_block.
5926 */
5927static int ocfs2_xattr_attach_refcount_normal(struct inode *inode,
5928 struct ocfs2_xattr_value_buf *vb,
5929 struct ocfs2_xattr_header *header,
5930 struct ocfs2_caching_info *ref_ci,
5931 struct buffer_head *ref_root_bh,
5932 struct ocfs2_cached_dealloc_ctxt *dealloc)
5933{
5934
5935 struct ocfs2_xattr_entry *xe;
5936 struct ocfs2_xattr_value_root *xv;
5937 struct ocfs2_extent_tree et;
5938 int i, ret = 0;
5939
5940 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
5941 xe = &header->xh_entries[i];
5942
5943 if (ocfs2_xattr_is_local(xe))
5944 continue;
5945
5946 xv = (struct ocfs2_xattr_value_root *)((void *)header +
5947 le16_to_cpu(xe->xe_name_offset) +
5948 OCFS2_XATTR_SIZE(xe->xe_name_len));
5949
5950 vb->vb_xv = xv;
5951 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
5952
5953 ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et,
5954 ref_ci, ref_root_bh,
5955 dealloc, NULL);
5956 if (ret) {
5957 mlog_errno(ret);
5958 break;
5959 }
5960 }
5961
5962 return ret;
5963}
5964
5965static int ocfs2_xattr_inline_attach_refcount(struct inode *inode,
5966 struct buffer_head *fe_bh,
5967 struct ocfs2_caching_info *ref_ci,
5968 struct buffer_head *ref_root_bh,
5969 struct ocfs2_cached_dealloc_ctxt *dealloc)
5970{
5971 struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data;
5972 struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *)
5973 (fe_bh->b_data + inode->i_sb->s_blocksize -
5974 le16_to_cpu(di->i_xattr_inline_size));
5975 struct ocfs2_xattr_value_buf vb = {
5976 .vb_bh = fe_bh,
5977 .vb_access = ocfs2_journal_access_di,
5978 };
5979
5980 return ocfs2_xattr_attach_refcount_normal(inode, &vb, header,
5981 ref_ci, ref_root_bh, dealloc);
5982}
5983
5984struct ocfs2_xattr_tree_value_refcount_para {
5985 struct ocfs2_caching_info *ref_ci;
5986 struct buffer_head *ref_root_bh;
5987 struct ocfs2_cached_dealloc_ctxt *dealloc;
5988};
5989
5990static int ocfs2_get_xattr_tree_value_root(struct super_block *sb,
5991 struct ocfs2_xattr_bucket *bucket,
5992 int offset,
5993 struct ocfs2_xattr_value_root **xv,
5994 struct buffer_head **bh)
5995{
5996 int ret, block_off, name_offset;
5997 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
5998 struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset];
5999 void *base;
6000
6001 ret = ocfs2_xattr_bucket_get_name_value(sb,
6002 bucket_xh(bucket),
6003 offset,
6004 &block_off,
6005 &name_offset);
6006 if (ret) {
6007 mlog_errno(ret);
6008 goto out;
6009 }
6010
6011 base = bucket_block(bucket, block_off);
6012
6013 *xv = (struct ocfs2_xattr_value_root *)(base + name_offset +
6014 OCFS2_XATTR_SIZE(xe->xe_name_len));
6015
6016 if (bh)
6017 *bh = bucket->bu_bhs[block_off];
6018out:
6019 return ret;
6020}
6021
6022/*
6023 * For a given xattr bucket, refcount all the entries which
6024 * have value stored outside.
6025 */
6026static int ocfs2_xattr_bucket_value_refcount(struct inode *inode,
6027 struct ocfs2_xattr_bucket *bucket,
6028 void *para)
6029{
6030 int i, ret = 0;
6031 struct ocfs2_extent_tree et;
6032 struct ocfs2_xattr_tree_value_refcount_para *ref =
6033 (struct ocfs2_xattr_tree_value_refcount_para *)para;
6034 struct ocfs2_xattr_header *xh =
6035 (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data;
6036 struct ocfs2_xattr_entry *xe;
6037 struct ocfs2_xattr_value_buf vb = {
6038 .vb_access = ocfs2_journal_access,
6039 };
6040 struct ocfs2_post_refcount refcount = {
6041 .credits = bucket->bu_blocks,
6042 .para = bucket,
6043 .func = ocfs2_xattr_bucket_post_refcount,
6044 };
6045 struct ocfs2_post_refcount *p = NULL;
6046
6047 /* We only need post_refcount if we support metaecc. */
6048 if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb)))
6049 p = &refcount;
6050
Tao Ma402b4182011-02-23 22:01:17 +08006051 trace_ocfs2_xattr_bucket_value_refcount(
6052 (unsigned long long)bucket_blkno(bucket),
6053 le16_to_cpu(xh->xh_count));
Tao Ma01292412009-09-21 13:04:19 +08006054 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
6055 xe = &xh->xh_entries[i];
6056
6057 if (ocfs2_xattr_is_local(xe))
6058 continue;
6059
6060 ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i,
6061 &vb.vb_xv, &vb.vb_bh);
6062 if (ret) {
6063 mlog_errno(ret);
6064 break;
6065 }
6066
6067 ocfs2_init_xattr_value_extent_tree(&et,
6068 INODE_CACHE(inode), &vb);
6069
6070 ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv,
6071 &et, ref->ref_ci,
6072 ref->ref_root_bh,
6073 ref->dealloc, p);
6074 if (ret) {
6075 mlog_errno(ret);
6076 break;
6077 }
6078 }
6079
6080 return ret;
6081
6082}
6083
6084static int ocfs2_refcount_xattr_tree_rec(struct inode *inode,
6085 struct buffer_head *root_bh,
6086 u64 blkno, u32 cpos, u32 len, void *para)
6087{
6088 return ocfs2_iterate_xattr_buckets(inode, blkno, len,
6089 ocfs2_xattr_bucket_value_refcount,
6090 para);
6091}
6092
6093static int ocfs2_xattr_block_attach_refcount(struct inode *inode,
6094 struct buffer_head *blk_bh,
6095 struct ocfs2_caching_info *ref_ci,
6096 struct buffer_head *ref_root_bh,
6097 struct ocfs2_cached_dealloc_ctxt *dealloc)
6098{
6099 int ret = 0;
6100 struct ocfs2_xattr_block *xb =
6101 (struct ocfs2_xattr_block *)blk_bh->b_data;
6102
6103 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
6104 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
6105 struct ocfs2_xattr_value_buf vb = {
6106 .vb_bh = blk_bh,
6107 .vb_access = ocfs2_journal_access_xb,
6108 };
6109
6110 ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header,
6111 ref_ci, ref_root_bh,
6112 dealloc);
6113 } else {
6114 struct ocfs2_xattr_tree_value_refcount_para para = {
6115 .ref_ci = ref_ci,
6116 .ref_root_bh = ref_root_bh,
6117 .dealloc = dealloc,
6118 };
6119
6120 ret = ocfs2_iterate_xattr_index_block(inode, blk_bh,
6121 ocfs2_refcount_xattr_tree_rec,
6122 &para);
6123 }
6124
6125 return ret;
6126}
6127
6128int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
6129 struct buffer_head *fe_bh,
6130 struct ocfs2_caching_info *ref_ci,
6131 struct buffer_head *ref_root_bh,
6132 struct ocfs2_cached_dealloc_ctxt *dealloc)
6133{
6134 int ret = 0;
6135 struct ocfs2_inode_info *oi = OCFS2_I(inode);
6136 struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data;
6137 struct buffer_head *blk_bh = NULL;
6138
6139 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
6140 ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh,
6141 ref_ci, ref_root_bh,
6142 dealloc);
6143 if (ret) {
6144 mlog_errno(ret);
6145 goto out;
6146 }
6147 }
6148
6149 if (!di->i_xattr_loc)
6150 goto out;
6151
6152 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
6153 &blk_bh);
6154 if (ret < 0) {
6155 mlog_errno(ret);
6156 goto out;
6157 }
6158
6159 ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci,
6160 ref_root_bh, dealloc);
6161 if (ret)
6162 mlog_errno(ret);
6163
6164 brelse(blk_bh);
6165out:
6166
6167 return ret;
6168}
6169
Tao Ma0fe9b662009-08-18 11:47:56 +08006170typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe);
Tao Ma01292412009-09-21 13:04:19 +08006171/*
Tao Ma2999d122009-08-18 11:43:55 +08006172 * Store the information we need in xattr reflink.
6173 * old_bh and new_bh are inode bh for the old and new inode.
6174 */
6175struct ocfs2_xattr_reflink {
6176 struct inode *old_inode;
6177 struct inode *new_inode;
6178 struct buffer_head *old_bh;
6179 struct buffer_head *new_bh;
6180 struct ocfs2_caching_info *ref_ci;
6181 struct buffer_head *ref_root_bh;
6182 struct ocfs2_cached_dealloc_ctxt *dealloc;
Tao Ma0fe9b662009-08-18 11:47:56 +08006183 should_xattr_reflinked *xattr_reflinked;
Tao Ma2999d122009-08-18 11:43:55 +08006184};
6185
6186/*
6187 * Given a xattr header and xe offset,
6188 * return the proper xv and the corresponding bh.
6189 * xattr in inode, block and xattr tree have different implementaions.
6190 */
6191typedef int (get_xattr_value_root)(struct super_block *sb,
6192 struct buffer_head *bh,
6193 struct ocfs2_xattr_header *xh,
6194 int offset,
6195 struct ocfs2_xattr_value_root **xv,
6196 struct buffer_head **ret_bh,
6197 void *para);
6198
6199/*
6200 * Calculate all the xattr value root metadata stored in this xattr header and
6201 * credits we need if we create them from the scratch.
6202 * We use get_xattr_value_root so that all types of xattr container can use it.
6203 */
6204static int ocfs2_value_metas_in_xattr_header(struct super_block *sb,
6205 struct buffer_head *bh,
6206 struct ocfs2_xattr_header *xh,
6207 int *metas, int *credits,
6208 int *num_recs,
6209 get_xattr_value_root *func,
6210 void *para)
6211{
6212 int i, ret = 0;
6213 struct ocfs2_xattr_value_root *xv;
6214 struct ocfs2_xattr_entry *xe;
6215
6216 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
6217 xe = &xh->xh_entries[i];
6218 if (ocfs2_xattr_is_local(xe))
6219 continue;
6220
6221 ret = func(sb, bh, xh, i, &xv, NULL, para);
6222 if (ret) {
6223 mlog_errno(ret);
6224 break;
6225 }
6226
6227 *metas += le16_to_cpu(xv->xr_list.l_tree_depth) *
6228 le16_to_cpu(xv->xr_list.l_next_free_rec);
6229
6230 *credits += ocfs2_calc_extend_credits(sb,
Goldwyn Rodrigues06f9da62013-11-12 15:06:52 -08006231 &def_xv.xv.xr_list);
Tao Ma2999d122009-08-18 11:43:55 +08006232
6233 /*
6234 * If the value is a tree with depth > 1, We don't go deep
6235 * to the extent block, so just calculate a maximum record num.
6236 */
6237 if (!xv->xr_list.l_tree_depth)
Tao Ma8ff6af82009-12-23 14:31:15 +08006238 *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec);
Tao Ma2999d122009-08-18 11:43:55 +08006239 else
6240 *num_recs += ocfs2_clusters_for_bytes(sb,
6241 XATTR_SIZE_MAX);
6242 }
6243
6244 return ret;
6245}
6246
6247/* Used by xattr inode and block to return the right xv and buffer_head. */
6248static int ocfs2_get_xattr_value_root(struct super_block *sb,
6249 struct buffer_head *bh,
6250 struct ocfs2_xattr_header *xh,
6251 int offset,
6252 struct ocfs2_xattr_value_root **xv,
6253 struct buffer_head **ret_bh,
6254 void *para)
6255{
6256 struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset];
6257
6258 *xv = (struct ocfs2_xattr_value_root *)((void *)xh +
6259 le16_to_cpu(xe->xe_name_offset) +
6260 OCFS2_XATTR_SIZE(xe->xe_name_len));
6261
6262 if (ret_bh)
6263 *ret_bh = bh;
6264
6265 return 0;
6266}
6267
6268/*
6269 * Lock the meta_ac and caculate how much credits we need for reflink xattrs.
6270 * It is only used for inline xattr and xattr block.
6271 */
6272static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb,
6273 struct ocfs2_xattr_header *xh,
6274 struct buffer_head *ref_root_bh,
6275 int *credits,
6276 struct ocfs2_alloc_context **meta_ac)
6277{
6278 int ret, meta_add = 0, num_recs = 0;
6279 struct ocfs2_refcount_block *rb =
6280 (struct ocfs2_refcount_block *)ref_root_bh->b_data;
6281
6282 *credits = 0;
6283
6284 ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh,
6285 &meta_add, credits, &num_recs,
6286 ocfs2_get_xattr_value_root,
6287 NULL);
6288 if (ret) {
6289 mlog_errno(ret);
6290 goto out;
6291 }
6292
6293 /*
6294 * We need to add/modify num_recs in refcount tree, so just calculate
6295 * an approximate number we need for refcount tree change.
6296 * Sometimes we need to split the tree, and after split, half recs
6297 * will be moved to the new block, and a new block can only provide
6298 * half number of recs. So we multiple new blocks by 2.
6299 */
6300 num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2;
6301 meta_add += num_recs;
6302 *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
6303 if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
6304 *credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
6305 le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
6306 else
6307 *credits += 1;
6308
6309 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac);
6310 if (ret)
6311 mlog_errno(ret);
6312
6313out:
6314 return ret;
6315}
6316
6317/*
6318 * Given a xattr header, reflink all the xattrs in this container.
6319 * It can be used for inode, block and bucket.
6320 *
6321 * NOTE:
6322 * Before we call this function, the caller has memcpy the xattr in
6323 * old_xh to the new_xh.
Tao Ma0fe9b662009-08-18 11:47:56 +08006324 *
6325 * If args.xattr_reflinked is set, call it to decide whether the xe should
6326 * be reflinked or not. If not, remove it from the new xattr header.
Tao Ma2999d122009-08-18 11:43:55 +08006327 */
6328static int ocfs2_reflink_xattr_header(handle_t *handle,
6329 struct ocfs2_xattr_reflink *args,
6330 struct buffer_head *old_bh,
6331 struct ocfs2_xattr_header *xh,
6332 struct buffer_head *new_bh,
6333 struct ocfs2_xattr_header *new_xh,
6334 struct ocfs2_xattr_value_buf *vb,
6335 struct ocfs2_alloc_context *meta_ac,
6336 get_xattr_value_root *func,
6337 void *para)
6338{
Tao Ma0fe9b662009-08-18 11:47:56 +08006339 int ret = 0, i, j;
Tao Ma2999d122009-08-18 11:43:55 +08006340 struct super_block *sb = args->old_inode->i_sb;
6341 struct buffer_head *value_bh;
Tao Ma0fe9b662009-08-18 11:47:56 +08006342 struct ocfs2_xattr_entry *xe, *last;
Tao Ma2999d122009-08-18 11:43:55 +08006343 struct ocfs2_xattr_value_root *xv, *new_xv;
6344 struct ocfs2_extent_tree data_et;
6345 u32 clusters, cpos, p_cluster, num_clusters;
6346 unsigned int ext_flags = 0;
6347
Tao Ma402b4182011-02-23 22:01:17 +08006348 trace_ocfs2_reflink_xattr_header((unsigned long long)old_bh->b_blocknr,
6349 le16_to_cpu(xh->xh_count));
Tao Ma0fe9b662009-08-18 11:47:56 +08006350
6351 last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)];
6352 for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) {
Tao Ma2999d122009-08-18 11:43:55 +08006353 xe = &xh->xh_entries[i];
6354
Tao Ma0fe9b662009-08-18 11:47:56 +08006355 if (args->xattr_reflinked && !args->xattr_reflinked(xe)) {
6356 xe = &new_xh->xh_entries[j];
6357
6358 le16_add_cpu(&new_xh->xh_count, -1);
6359 if (new_xh->xh_count) {
6360 memmove(xe, xe + 1,
6361 (void *)last - (void *)xe);
6362 memset(last, 0,
6363 sizeof(struct ocfs2_xattr_entry));
6364 }
6365
6366 /*
6367 * We don't want j to increase in the next round since
6368 * it is already moved ahead.
6369 */
6370 j--;
6371 continue;
6372 }
6373
Tao Ma2999d122009-08-18 11:43:55 +08006374 if (ocfs2_xattr_is_local(xe))
6375 continue;
6376
6377 ret = func(sb, old_bh, xh, i, &xv, NULL, para);
6378 if (ret) {
6379 mlog_errno(ret);
6380 break;
6381 }
6382
Tao Ma0fe9b662009-08-18 11:47:56 +08006383 ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para);
Tao Ma2999d122009-08-18 11:43:55 +08006384 if (ret) {
6385 mlog_errno(ret);
6386 break;
6387 }
6388
6389 /*
6390 * For the xattr which has l_tree_depth = 0, all the extent
6391 * recs have already be copied to the new xh with the
6392 * propriate OCFS2_EXT_REFCOUNTED flag we just need to
6393 * increase the refount count int the refcount tree.
6394 *
6395 * For the xattr which has l_tree_depth > 0, we need
6396 * to initialize it to the empty default value root,
6397 * and then insert the extents one by one.
6398 */
6399 if (xv->xr_list.l_tree_depth) {
alex chen32ed0bd2018-01-31 16:14:36 -08006400 memcpy(new_xv, &def_xv, OCFS2_XATTR_ROOT_SIZE);
Tao Ma2999d122009-08-18 11:43:55 +08006401 vb->vb_xv = new_xv;
6402 vb->vb_bh = value_bh;
6403 ocfs2_init_xattr_value_extent_tree(&data_et,
6404 INODE_CACHE(args->new_inode), vb);
6405 }
6406
6407 clusters = le32_to_cpu(xv->xr_clusters);
6408 cpos = 0;
6409 while (cpos < clusters) {
6410 ret = ocfs2_xattr_get_clusters(args->old_inode,
6411 cpos,
6412 &p_cluster,
6413 &num_clusters,
6414 &xv->xr_list,
6415 &ext_flags);
6416 if (ret) {
6417 mlog_errno(ret);
6418 goto out;
6419 }
6420
6421 BUG_ON(!p_cluster);
6422
6423 if (xv->xr_list.l_tree_depth) {
6424 ret = ocfs2_insert_extent(handle,
6425 &data_et, cpos,
6426 ocfs2_clusters_to_blocks(
6427 args->old_inode->i_sb,
6428 p_cluster),
6429 num_clusters, ext_flags,
6430 meta_ac);
6431 if (ret) {
6432 mlog_errno(ret);
6433 goto out;
6434 }
6435 }
6436
6437 ret = ocfs2_increase_refcount(handle, args->ref_ci,
6438 args->ref_root_bh,
6439 p_cluster, num_clusters,
6440 meta_ac, args->dealloc);
6441 if (ret) {
6442 mlog_errno(ret);
6443 goto out;
6444 }
6445
6446 cpos += num_clusters;
6447 }
6448 }
6449
6450out:
6451 return ret;
6452}
6453
6454static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args)
6455{
6456 int ret = 0, credits = 0;
6457 handle_t *handle;
6458 struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb);
6459 struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data;
6460 int inline_size = le16_to_cpu(di->i_xattr_inline_size);
6461 int header_off = osb->sb->s_blocksize - inline_size;
6462 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)
6463 (args->old_bh->b_data + header_off);
6464 struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *)
6465 (args->new_bh->b_data + header_off);
6466 struct ocfs2_alloc_context *meta_ac = NULL;
6467 struct ocfs2_inode_info *new_oi;
6468 struct ocfs2_dinode *new_di;
6469 struct ocfs2_xattr_value_buf vb = {
6470 .vb_bh = args->new_bh,
6471 .vb_access = ocfs2_journal_access_di,
6472 };
6473
6474 ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
6475 &credits, &meta_ac);
6476 if (ret) {
6477 mlog_errno(ret);
6478 goto out;
6479 }
6480
6481 handle = ocfs2_start_trans(osb, credits);
6482 if (IS_ERR(handle)) {
6483 ret = PTR_ERR(handle);
6484 mlog_errno(ret);
6485 goto out;
6486 }
6487
6488 ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode),
6489 args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE);
6490 if (ret) {
6491 mlog_errno(ret);
6492 goto out_commit;
6493 }
6494
6495 memcpy(args->new_bh->b_data + header_off,
6496 args->old_bh->b_data + header_off, inline_size);
6497
6498 new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
6499 new_di->i_xattr_inline_size = cpu_to_le16(inline_size);
6500
6501 ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh,
6502 args->new_bh, new_xh, &vb, meta_ac,
6503 ocfs2_get_xattr_value_root, NULL);
6504 if (ret) {
6505 mlog_errno(ret);
6506 goto out_commit;
6507 }
6508
6509 new_oi = OCFS2_I(args->new_inode);
Junxiao Bief962df2013-07-03 15:01:03 -07006510 /*
6511 * Adjust extent record count to reserve space for extended attribute.
6512 * Inline data count had been adjusted in ocfs2_duplicate_inline_data().
6513 */
6514 if (!(new_oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) &&
6515 !(ocfs2_inode_is_fast_symlink(args->new_inode))) {
6516 struct ocfs2_extent_list *el = &new_di->id2.i_list;
6517 le16_add_cpu(&el->l_count, -(inline_size /
6518 sizeof(struct ocfs2_extent_rec)));
6519 }
Tao Ma2999d122009-08-18 11:43:55 +08006520 spin_lock(&new_oi->ip_lock);
6521 new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL;
6522 new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
6523 spin_unlock(&new_oi->ip_lock);
6524
6525 ocfs2_journal_dirty(handle, args->new_bh);
6526
6527out_commit:
6528 ocfs2_commit_trans(osb, handle);
6529
6530out:
6531 if (meta_ac)
6532 ocfs2_free_alloc_context(meta_ac);
6533 return ret;
6534}
6535
6536static int ocfs2_create_empty_xattr_block(struct inode *inode,
6537 struct buffer_head *fe_bh,
6538 struct buffer_head **ret_bh,
6539 int indexed)
6540{
6541 int ret;
Tao Ma2999d122009-08-18 11:43:55 +08006542 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Tao Mab2317962010-03-19 15:04:24 +08006543 struct ocfs2_xattr_set_ctxt ctxt;
Tao Ma2999d122009-08-18 11:43:55 +08006544
Tao Mab2317962010-03-19 15:04:24 +08006545 memset(&ctxt, 0, sizeof(ctxt));
6546 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &ctxt.meta_ac);
Tao Ma2999d122009-08-18 11:43:55 +08006547 if (ret < 0) {
6548 mlog_errno(ret);
6549 return ret;
6550 }
6551
Joel Beckerd3981542009-08-19 02:13:50 -07006552 ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS);
6553 if (IS_ERR(ctxt.handle)) {
6554 ret = PTR_ERR(ctxt.handle);
Tao Ma2999d122009-08-18 11:43:55 +08006555 mlog_errno(ret);
6556 goto out;
6557 }
6558
Tao Ma402b4182011-02-23 22:01:17 +08006559 trace_ocfs2_create_empty_xattr_block(
6560 (unsigned long long)fe_bh->b_blocknr, indexed);
Joel Beckerd3981542009-08-19 02:13:50 -07006561 ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed,
6562 ret_bh);
Tao Ma2999d122009-08-18 11:43:55 +08006563 if (ret)
6564 mlog_errno(ret);
6565
Joel Beckerd3981542009-08-19 02:13:50 -07006566 ocfs2_commit_trans(osb, ctxt.handle);
Tao Ma2999d122009-08-18 11:43:55 +08006567out:
Tao Mab2317962010-03-19 15:04:24 +08006568 ocfs2_free_alloc_context(ctxt.meta_ac);
Tao Ma2999d122009-08-18 11:43:55 +08006569 return ret;
6570}
6571
6572static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args,
6573 struct buffer_head *blk_bh,
6574 struct buffer_head *new_blk_bh)
6575{
6576 int ret = 0, credits = 0;
6577 handle_t *handle;
6578 struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode);
6579 struct ocfs2_dinode *new_di;
6580 struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb);
6581 int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
6582 struct ocfs2_xattr_block *xb =
6583 (struct ocfs2_xattr_block *)blk_bh->b_data;
6584 struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header;
6585 struct ocfs2_xattr_block *new_xb =
6586 (struct ocfs2_xattr_block *)new_blk_bh->b_data;
6587 struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header;
6588 struct ocfs2_alloc_context *meta_ac;
6589 struct ocfs2_xattr_value_buf vb = {
6590 .vb_bh = new_blk_bh,
6591 .vb_access = ocfs2_journal_access_xb,
6592 };
6593
6594 ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
6595 &credits, &meta_ac);
6596 if (ret) {
6597 mlog_errno(ret);
6598 return ret;
6599 }
6600
6601 /* One more credits in case we need to add xattr flags in new inode. */
6602 handle = ocfs2_start_trans(osb, credits + 1);
6603 if (IS_ERR(handle)) {
6604 ret = PTR_ERR(handle);
6605 mlog_errno(ret);
6606 goto out;
6607 }
6608
6609 if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
6610 ret = ocfs2_journal_access_di(handle,
6611 INODE_CACHE(args->new_inode),
6612 args->new_bh,
6613 OCFS2_JOURNAL_ACCESS_WRITE);
6614 if (ret) {
6615 mlog_errno(ret);
6616 goto out_commit;
6617 }
6618 }
6619
6620 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode),
6621 new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE);
6622 if (ret) {
6623 mlog_errno(ret);
6624 goto out_commit;
6625 }
6626
6627 memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off,
6628 osb->sb->s_blocksize - header_off);
6629
6630 ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh,
6631 new_blk_bh, new_xh, &vb, meta_ac,
6632 ocfs2_get_xattr_value_root, NULL);
6633 if (ret) {
6634 mlog_errno(ret);
6635 goto out_commit;
6636 }
6637
6638 ocfs2_journal_dirty(handle, new_blk_bh);
6639
6640 if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
6641 new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
6642 spin_lock(&new_oi->ip_lock);
6643 new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
6644 new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
6645 spin_unlock(&new_oi->ip_lock);
6646
6647 ocfs2_journal_dirty(handle, args->new_bh);
6648 }
6649
6650out_commit:
6651 ocfs2_commit_trans(osb, handle);
6652
6653out:
6654 ocfs2_free_alloc_context(meta_ac);
6655 return ret;
6656}
6657
6658struct ocfs2_reflink_xattr_tree_args {
6659 struct ocfs2_xattr_reflink *reflink;
6660 struct buffer_head *old_blk_bh;
6661 struct buffer_head *new_blk_bh;
6662 struct ocfs2_xattr_bucket *old_bucket;
6663 struct ocfs2_xattr_bucket *new_bucket;
6664};
6665
6666/*
6667 * NOTE:
6668 * We have to handle the case that both old bucket and new bucket
6669 * will call this function to get the right ret_bh.
6670 * So The caller must give us the right bh.
6671 */
6672static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb,
6673 struct buffer_head *bh,
6674 struct ocfs2_xattr_header *xh,
6675 int offset,
6676 struct ocfs2_xattr_value_root **xv,
6677 struct buffer_head **ret_bh,
6678 void *para)
6679{
6680 struct ocfs2_reflink_xattr_tree_args *args =
6681 (struct ocfs2_reflink_xattr_tree_args *)para;
6682 struct ocfs2_xattr_bucket *bucket;
6683
6684 if (bh == args->old_bucket->bu_bhs[0])
6685 bucket = args->old_bucket;
6686 else
6687 bucket = args->new_bucket;
6688
6689 return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
6690 xv, ret_bh);
6691}
6692
6693struct ocfs2_value_tree_metas {
6694 int num_metas;
6695 int credits;
6696 int num_recs;
6697};
6698
6699static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb,
6700 struct buffer_head *bh,
6701 struct ocfs2_xattr_header *xh,
6702 int offset,
6703 struct ocfs2_xattr_value_root **xv,
6704 struct buffer_head **ret_bh,
6705 void *para)
6706{
6707 struct ocfs2_xattr_bucket *bucket =
6708 (struct ocfs2_xattr_bucket *)para;
6709
6710 return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
6711 xv, ret_bh);
6712}
6713
6714static int ocfs2_calc_value_tree_metas(struct inode *inode,
6715 struct ocfs2_xattr_bucket *bucket,
6716 void *para)
6717{
6718 struct ocfs2_value_tree_metas *metas =
6719 (struct ocfs2_value_tree_metas *)para;
6720 struct ocfs2_xattr_header *xh =
6721 (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data;
6722
6723 /* Add the credits for this bucket first. */
6724 metas->credits += bucket->bu_blocks;
6725 return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0],
6726 xh, &metas->num_metas,
6727 &metas->credits, &metas->num_recs,
6728 ocfs2_value_tree_metas_in_bucket,
6729 bucket);
6730}
6731
6732/*
6733 * Given a xattr extent rec starting from blkno and having len clusters,
6734 * iterate all the buckets calculate how much metadata we need for reflinking
6735 * all the ocfs2_xattr_value_root and lock the allocators accordingly.
6736 */
6737static int ocfs2_lock_reflink_xattr_rec_allocators(
6738 struct ocfs2_reflink_xattr_tree_args *args,
6739 struct ocfs2_extent_tree *xt_et,
6740 u64 blkno, u32 len, int *credits,
6741 struct ocfs2_alloc_context **meta_ac,
6742 struct ocfs2_alloc_context **data_ac)
6743{
6744 int ret, num_free_extents;
6745 struct ocfs2_value_tree_metas metas;
6746 struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb);
6747 struct ocfs2_refcount_block *rb;
6748
6749 memset(&metas, 0, sizeof(metas));
6750
6751 ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len,
6752 ocfs2_calc_value_tree_metas, &metas);
6753 if (ret) {
6754 mlog_errno(ret);
6755 goto out;
6756 }
6757
6758 *credits = metas.credits;
6759
6760 /*
6761 * Calculate we need for refcount tree change.
6762 *
6763 * We need to add/modify num_recs in refcount tree, so just calculate
6764 * an approximate number we need for refcount tree change.
6765 * Sometimes we need to split the tree, and after split, half recs
6766 * will be moved to the new block, and a new block can only provide
6767 * half number of recs. So we multiple new blocks by 2.
6768 * In the end, we have to add credits for modifying the already
6769 * existed refcount block.
6770 */
6771 rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data;
6772 metas.num_recs =
6773 (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) /
6774 ocfs2_refcount_recs_per_rb(osb->sb) * 2;
6775 metas.num_metas += metas.num_recs;
6776 *credits += metas.num_recs +
6777 metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
6778 if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
6779 *credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
6780 le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
6781 else
6782 *credits += 1;
6783
6784 /* count in the xattr tree change. */
Jun Piao964f14a2017-09-06 16:19:11 -07006785 num_free_extents = ocfs2_num_free_extents(xt_et);
Tao Ma2999d122009-08-18 11:43:55 +08006786 if (num_free_extents < 0) {
6787 ret = num_free_extents;
6788 mlog_errno(ret);
6789 goto out;
6790 }
6791
6792 if (num_free_extents < len)
6793 metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el);
6794
6795 *credits += ocfs2_calc_extend_credits(osb->sb,
Goldwyn Rodrigues06f9da62013-11-12 15:06:52 -08006796 xt_et->et_root_el);
Tao Ma2999d122009-08-18 11:43:55 +08006797
6798 if (metas.num_metas) {
6799 ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas,
6800 meta_ac);
6801 if (ret) {
6802 mlog_errno(ret);
6803 goto out;
6804 }
6805 }
6806
6807 if (len) {
6808 ret = ocfs2_reserve_clusters(osb, len, data_ac);
6809 if (ret)
6810 mlog_errno(ret);
6811 }
6812out:
6813 if (ret) {
6814 if (*meta_ac) {
6815 ocfs2_free_alloc_context(*meta_ac);
Joseph Qi6cae6d32013-09-11 14:19:58 -07006816 *meta_ac = NULL;
Tao Ma2999d122009-08-18 11:43:55 +08006817 }
6818 }
6819
6820 return ret;
6821}
6822
Tao Ma121a39b2010-07-09 14:53:12 +08006823static int ocfs2_reflink_xattr_bucket(handle_t *handle,
Tao Ma2999d122009-08-18 11:43:55 +08006824 u64 blkno, u64 new_blkno, u32 clusters,
Tao Ma121a39b2010-07-09 14:53:12 +08006825 u32 *cpos, int num_buckets,
Tao Ma2999d122009-08-18 11:43:55 +08006826 struct ocfs2_alloc_context *meta_ac,
6827 struct ocfs2_alloc_context *data_ac,
6828 struct ocfs2_reflink_xattr_tree_args *args)
6829{
6830 int i, j, ret = 0;
6831 struct super_block *sb = args->reflink->old_inode->i_sb;
Tao Ma2999d122009-08-18 11:43:55 +08006832 int bpb = args->old_bucket->bu_blocks;
6833 struct ocfs2_xattr_value_buf vb = {
6834 .vb_access = ocfs2_journal_access,
6835 };
6836
6837 for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) {
6838 ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
6839 if (ret) {
6840 mlog_errno(ret);
6841 break;
6842 }
6843
Wengang Wang9c339252014-04-03 14:47:15 -07006844 ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno, 1);
Tao Ma2999d122009-08-18 11:43:55 +08006845 if (ret) {
6846 mlog_errno(ret);
6847 break;
6848 }
6849
Tao Ma2999d122009-08-18 11:43:55 +08006850 ret = ocfs2_xattr_bucket_journal_access(handle,
6851 args->new_bucket,
6852 OCFS2_JOURNAL_ACCESS_CREATE);
6853 if (ret) {
6854 mlog_errno(ret);
6855 break;
6856 }
6857
6858 for (j = 0; j < bpb; j++)
6859 memcpy(bucket_block(args->new_bucket, j),
6860 bucket_block(args->old_bucket, j),
6861 sb->s_blocksize);
6862
Tao Ma121a39b2010-07-09 14:53:12 +08006863 /*
6864 * Record the start cpos so that we can use it to initialize
6865 * our xattr tree we also set the xh_num_bucket for the new
6866 * bucket.
6867 */
6868 if (i == 0) {
6869 *cpos = le32_to_cpu(bucket_xh(args->new_bucket)->
6870 xh_entries[0].xe_name_hash);
6871 bucket_xh(args->new_bucket)->xh_num_buckets =
6872 cpu_to_le16(num_buckets);
6873 }
6874
Tao Ma2999d122009-08-18 11:43:55 +08006875 ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
6876
6877 ret = ocfs2_reflink_xattr_header(handle, args->reflink,
6878 args->old_bucket->bu_bhs[0],
6879 bucket_xh(args->old_bucket),
6880 args->new_bucket->bu_bhs[0],
6881 bucket_xh(args->new_bucket),
6882 &vb, meta_ac,
6883 ocfs2_get_reflink_xattr_value_root,
6884 args);
6885 if (ret) {
6886 mlog_errno(ret);
6887 break;
6888 }
6889
6890 /*
6891 * Re-access and dirty the bucket to calculate metaecc.
6892 * Because we may extend the transaction in reflink_xattr_header
6893 * which will let the already accessed block gone.
6894 */
6895 ret = ocfs2_xattr_bucket_journal_access(handle,
6896 args->new_bucket,
6897 OCFS2_JOURNAL_ACCESS_WRITE);
6898 if (ret) {
6899 mlog_errno(ret);
6900 break;
6901 }
6902
6903 ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
Tao Ma121a39b2010-07-09 14:53:12 +08006904
Tao Ma2999d122009-08-18 11:43:55 +08006905 ocfs2_xattr_bucket_relse(args->old_bucket);
6906 ocfs2_xattr_bucket_relse(args->new_bucket);
6907 }
6908
6909 ocfs2_xattr_bucket_relse(args->old_bucket);
6910 ocfs2_xattr_bucket_relse(args->new_bucket);
6911 return ret;
6912}
Tao Ma121a39b2010-07-09 14:53:12 +08006913
6914static int ocfs2_reflink_xattr_buckets(handle_t *handle,
6915 struct inode *inode,
6916 struct ocfs2_reflink_xattr_tree_args *args,
6917 struct ocfs2_extent_tree *et,
6918 struct ocfs2_alloc_context *meta_ac,
6919 struct ocfs2_alloc_context *data_ac,
6920 u64 blkno, u32 cpos, u32 len)
6921{
6922 int ret, first_inserted = 0;
6923 u32 p_cluster, num_clusters, reflink_cpos = 0;
6924 u64 new_blkno;
6925 unsigned int num_buckets, reflink_buckets;
6926 unsigned int bpc =
6927 ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
6928
6929 ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
6930 if (ret) {
6931 mlog_errno(ret);
6932 goto out;
6933 }
6934 num_buckets = le16_to_cpu(bucket_xh(args->old_bucket)->xh_num_buckets);
6935 ocfs2_xattr_bucket_relse(args->old_bucket);
6936
6937 while (len && num_buckets) {
6938 ret = ocfs2_claim_clusters(handle, data_ac,
6939 1, &p_cluster, &num_clusters);
6940 if (ret) {
6941 mlog_errno(ret);
6942 goto out;
6943 }
6944
6945 new_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
6946 reflink_buckets = min(num_buckets, bpc * num_clusters);
6947
6948 ret = ocfs2_reflink_xattr_bucket(handle, blkno,
6949 new_blkno, num_clusters,
6950 &reflink_cpos, reflink_buckets,
6951 meta_ac, data_ac, args);
6952 if (ret) {
6953 mlog_errno(ret);
6954 goto out;
6955 }
6956
6957 /*
6958 * For the 1st allocated cluster, we make it use the same cpos
6959 * so that the xattr tree looks the same as the original one
6960 * in the most case.
6961 */
6962 if (!first_inserted) {
6963 reflink_cpos = cpos;
6964 first_inserted = 1;
6965 }
6966 ret = ocfs2_insert_extent(handle, et, reflink_cpos, new_blkno,
6967 num_clusters, 0, meta_ac);
6968 if (ret)
6969 mlog_errno(ret);
6970
Tao Ma402b4182011-02-23 22:01:17 +08006971 trace_ocfs2_reflink_xattr_buckets((unsigned long long)new_blkno,
6972 num_clusters, reflink_cpos);
Tao Ma121a39b2010-07-09 14:53:12 +08006973
6974 len -= num_clusters;
6975 blkno += ocfs2_clusters_to_blocks(inode->i_sb, num_clusters);
6976 num_buckets -= reflink_buckets;
6977 }
6978out:
6979 return ret;
6980}
6981
Tao Ma2999d122009-08-18 11:43:55 +08006982/*
6983 * Create the same xattr extent record in the new inode's xattr tree.
6984 */
6985static int ocfs2_reflink_xattr_rec(struct inode *inode,
6986 struct buffer_head *root_bh,
6987 u64 blkno,
6988 u32 cpos,
6989 u32 len,
6990 void *para)
6991{
6992 int ret, credits = 0;
Tao Ma2999d122009-08-18 11:43:55 +08006993 handle_t *handle;
6994 struct ocfs2_reflink_xattr_tree_args *args =
6995 (struct ocfs2_reflink_xattr_tree_args *)para;
6996 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
6997 struct ocfs2_alloc_context *meta_ac = NULL;
6998 struct ocfs2_alloc_context *data_ac = NULL;
6999 struct ocfs2_extent_tree et;
7000
Tao Ma402b4182011-02-23 22:01:17 +08007001 trace_ocfs2_reflink_xattr_rec((unsigned long long)blkno, len);
Tao Ma121a39b2010-07-09 14:53:12 +08007002
Tao Ma2999d122009-08-18 11:43:55 +08007003 ocfs2_init_xattr_tree_extent_tree(&et,
7004 INODE_CACHE(args->reflink->new_inode),
7005 args->new_blk_bh);
7006
7007 ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno,
7008 len, &credits,
7009 &meta_ac, &data_ac);
7010 if (ret) {
7011 mlog_errno(ret);
7012 goto out;
7013 }
7014
7015 handle = ocfs2_start_trans(osb, credits);
7016 if (IS_ERR(handle)) {
7017 ret = PTR_ERR(handle);
7018 mlog_errno(ret);
7019 goto out;
7020 }
7021
Tao Ma121a39b2010-07-09 14:53:12 +08007022 ret = ocfs2_reflink_xattr_buckets(handle, inode, args, &et,
7023 meta_ac, data_ac,
7024 blkno, cpos, len);
Tao Ma2999d122009-08-18 11:43:55 +08007025 if (ret)
7026 mlog_errno(ret);
7027
Tao Ma2999d122009-08-18 11:43:55 +08007028 ocfs2_commit_trans(osb, handle);
7029
7030out:
7031 if (meta_ac)
7032 ocfs2_free_alloc_context(meta_ac);
7033 if (data_ac)
7034 ocfs2_free_alloc_context(data_ac);
7035 return ret;
7036}
7037
7038/*
7039 * Create reflinked xattr buckets.
7040 * We will add bucket one by one, and refcount all the xattrs in the bucket
7041 * if they are stored outside.
7042 */
7043static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args,
7044 struct buffer_head *blk_bh,
7045 struct buffer_head *new_blk_bh)
7046{
7047 int ret;
7048 struct ocfs2_reflink_xattr_tree_args para;
7049
7050 memset(&para, 0, sizeof(para));
7051 para.reflink = args;
7052 para.old_blk_bh = blk_bh;
7053 para.new_blk_bh = new_blk_bh;
7054
7055 para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode);
7056 if (!para.old_bucket) {
7057 mlog_errno(-ENOMEM);
7058 return -ENOMEM;
7059 }
7060
7061 para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode);
7062 if (!para.new_bucket) {
7063 ret = -ENOMEM;
7064 mlog_errno(ret);
7065 goto out;
7066 }
7067
7068 ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh,
7069 ocfs2_reflink_xattr_rec,
7070 &para);
7071 if (ret)
7072 mlog_errno(ret);
7073
7074out:
7075 ocfs2_xattr_bucket_free(para.old_bucket);
7076 ocfs2_xattr_bucket_free(para.new_bucket);
7077 return ret;
7078}
7079
7080static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args,
7081 struct buffer_head *blk_bh)
7082{
7083 int ret, indexed = 0;
7084 struct buffer_head *new_blk_bh = NULL;
7085 struct ocfs2_xattr_block *xb =
7086 (struct ocfs2_xattr_block *)blk_bh->b_data;
7087
7088
7089 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)
7090 indexed = 1;
7091
7092 ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh,
7093 &new_blk_bh, indexed);
7094 if (ret) {
7095 mlog_errno(ret);
7096 goto out;
7097 }
7098
Jeff Liu2decd652010-10-12 11:18:18 +08007099 if (!indexed)
Tao Ma2999d122009-08-18 11:43:55 +08007100 ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh);
7101 else
7102 ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh);
7103 if (ret)
7104 mlog_errno(ret);
7105
7106out:
7107 brelse(new_blk_bh);
7108 return ret;
7109}
7110
Tao Ma0fe9b662009-08-18 11:47:56 +08007111static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe)
7112{
7113 int type = ocfs2_xattr_get_type(xe);
7114
7115 return type != OCFS2_XATTR_INDEX_SECURITY &&
7116 type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS &&
7117 type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
7118}
7119
Tao Ma2999d122009-08-18 11:43:55 +08007120int ocfs2_reflink_xattrs(struct inode *old_inode,
7121 struct buffer_head *old_bh,
7122 struct inode *new_inode,
Tao Ma0fe9b662009-08-18 11:47:56 +08007123 struct buffer_head *new_bh,
7124 bool preserve_security)
Tao Ma2999d122009-08-18 11:43:55 +08007125{
7126 int ret;
7127 struct ocfs2_xattr_reflink args;
7128 struct ocfs2_inode_info *oi = OCFS2_I(old_inode);
7129 struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data;
7130 struct buffer_head *blk_bh = NULL;
7131 struct ocfs2_cached_dealloc_ctxt dealloc;
7132 struct ocfs2_refcount_tree *ref_tree;
7133 struct buffer_head *ref_root_bh = NULL;
7134
7135 ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb),
7136 le64_to_cpu(di->i_refcount_loc),
7137 1, &ref_tree, &ref_root_bh);
7138 if (ret) {
7139 mlog_errno(ret);
7140 goto out;
7141 }
7142
7143 ocfs2_init_dealloc_ctxt(&dealloc);
7144
7145 args.old_inode = old_inode;
7146 args.new_inode = new_inode;
7147 args.old_bh = old_bh;
7148 args.new_bh = new_bh;
7149 args.ref_ci = &ref_tree->rf_ci;
7150 args.ref_root_bh = ref_root_bh;
7151 args.dealloc = &dealloc;
Tao Ma0fe9b662009-08-18 11:47:56 +08007152 if (preserve_security)
7153 args.xattr_reflinked = NULL;
7154 else
7155 args.xattr_reflinked = ocfs2_reflink_xattr_no_security;
Tao Ma2999d122009-08-18 11:43:55 +08007156
7157 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
7158 ret = ocfs2_reflink_xattr_inline(&args);
7159 if (ret) {
7160 mlog_errno(ret);
7161 goto out_unlock;
7162 }
7163 }
7164
7165 if (!di->i_xattr_loc)
7166 goto out_unlock;
7167
7168 ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc),
7169 &blk_bh);
7170 if (ret < 0) {
7171 mlog_errno(ret);
7172 goto out_unlock;
7173 }
7174
7175 ret = ocfs2_reflink_xattr_in_block(&args, blk_bh);
7176 if (ret)
7177 mlog_errno(ret);
7178
7179 brelse(blk_bh);
7180
7181out_unlock:
7182 ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb),
7183 ref_tree, 1);
7184 brelse(ref_root_bh);
7185
7186 if (ocfs2_dealloc_has_cluster(&dealloc)) {
7187 ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1);
7188 ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc);
7189 }
7190
7191out:
7192 return ret;
7193}
7194
7195/*
Tao Ma0fe9b662009-08-18 11:47:56 +08007196 * Initialize security and acl for a already created inode.
7197 * Used for reflink a non-preserve-security file.
7198 *
7199 * It uses common api like ocfs2_xattr_set, so the caller
7200 * must not hold any lock expect i_mutex.
7201 */
7202int ocfs2_init_security_and_acl(struct inode *dir,
Eric Paris2a7dba32011-02-01 11:05:39 -05007203 struct inode *inode,
Junxiao Bic25a1e02016-05-12 15:42:18 -07007204 const struct qstr *qstr)
Tao Ma0fe9b662009-08-18 11:47:56 +08007205{
Christoph Hellwig702e5bc2013-12-20 05:16:48 -08007206 int ret = 0;
Junxiao Bic25a1e02016-05-12 15:42:18 -07007207 struct buffer_head *dir_bh = NULL;
Tao Ma0fe9b662009-08-18 11:47:56 +08007208
Mimi Zohar9d8f13b2011-06-06 15:29:25 -04007209 ret = ocfs2_init_security_get(inode, dir, qstr, NULL);
Jeff Liu32918dd2013-02-27 17:02:48 -08007210 if (ret) {
Tao Ma0fe9b662009-08-18 11:47:56 +08007211 mlog_errno(ret);
7212 goto leave;
7213 }
7214
7215 ret = ocfs2_inode_lock(dir, &dir_bh, 0);
7216 if (ret) {
7217 mlog_errno(ret);
7218 goto leave;
7219 }
Junxiao Bic25a1e02016-05-12 15:42:18 -07007220 ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL);
7221 if (ret)
7222 mlog_errno(ret);
Tao Ma0fe9b662009-08-18 11:47:56 +08007223
7224 ocfs2_inode_unlock(dir, 0);
7225 brelse(dir_bh);
7226leave:
7227 return ret;
7228}
Andreas Gruenbacher1046cb12015-12-02 14:44:42 +01007229
Tao Ma0fe9b662009-08-18 11:47:56 +08007230/*
Tiger Yang923f7f32008-11-14 11:16:27 +08007231 * 'security' attributes support
7232 */
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02007233static int ocfs2_xattr_security_get(const struct xattr_handler *handler,
Al Virob2968212016-04-10 20:48:24 -04007234 struct dentry *unused, struct inode *inode,
7235 const char *name, void *buffer, size_t size)
Tiger Yang923f7f32008-11-14 11:16:27 +08007236{
Al Virob2968212016-04-10 20:48:24 -04007237 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY,
Christoph Hellwig431547b2009-11-13 09:52:56 +00007238 name, buffer, size);
Tiger Yang923f7f32008-11-14 11:16:27 +08007239}
7240
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02007241static int ocfs2_xattr_security_set(const struct xattr_handler *handler,
Al Viro59301222016-05-27 10:19:30 -04007242 struct dentry *unused, struct inode *inode,
7243 const char *name, const void *value,
7244 size_t size, int flags)
Tiger Yang923f7f32008-11-14 11:16:27 +08007245{
Al Viro59301222016-05-27 10:19:30 -04007246 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY,
Christoph Hellwig431547b2009-11-13 09:52:56 +00007247 name, value, size, flags);
Tiger Yang923f7f32008-11-14 11:16:27 +08007248}
7249
Joseph Qib519ea62015-06-24 16:55:34 -07007250static int ocfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
Mimi Zohar9d8f13b2011-06-06 15:29:25 -04007251 void *fs_info)
7252{
7253 const struct xattr *xattr;
7254 int err = 0;
7255
7256 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
7257 err = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY,
7258 xattr->name, xattr->value,
7259 xattr->value_len, XATTR_CREATE);
7260 if (err)
7261 break;
7262 }
7263 return err;
7264}
7265
Tiger Yang534eadd2008-11-14 11:16:41 +08007266int ocfs2_init_security_get(struct inode *inode,
7267 struct inode *dir,
Eric Paris2a7dba32011-02-01 11:05:39 -05007268 const struct qstr *qstr,
Tiger Yang534eadd2008-11-14 11:16:41 +08007269 struct ocfs2_security_xattr_info *si)
7270{
Tiger Yang38d59ef2008-12-17 10:22:56 +08007271 /* check whether ocfs2 support feature xattr */
7272 if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb)))
7273 return -EOPNOTSUPP;
Mimi Zohar9d8f13b2011-06-06 15:29:25 -04007274 if (si)
7275 return security_old_inode_init_security(inode, dir, qstr,
7276 &si->name, &si->value,
7277 &si->value_len);
7278
7279 return security_inode_init_security(inode, dir, qstr,
7280 &ocfs2_initxattrs, NULL);
Tiger Yang534eadd2008-11-14 11:16:41 +08007281}
7282
7283int ocfs2_init_security_set(handle_t *handle,
7284 struct inode *inode,
7285 struct buffer_head *di_bh,
7286 struct ocfs2_security_xattr_info *si,
7287 struct ocfs2_alloc_context *xattr_ac,
7288 struct ocfs2_alloc_context *data_ac)
7289{
7290 return ocfs2_xattr_set_handle(handle, inode, di_bh,
7291 OCFS2_XATTR_INDEX_SECURITY,
7292 si->name, si->value, si->value_len, 0,
7293 xattr_ac, data_ac);
7294}
7295
Stephen Hemminger537d81c2010-05-13 17:53:22 -07007296const struct xattr_handler ocfs2_xattr_security_handler = {
Tiger Yang923f7f32008-11-14 11:16:27 +08007297 .prefix = XATTR_SECURITY_PREFIX,
Tiger Yang923f7f32008-11-14 11:16:27 +08007298 .get = ocfs2_xattr_security_get,
7299 .set = ocfs2_xattr_security_set,
7300};
7301
7302/*
Mark Fasheh99219ae2008-10-07 14:52:59 -07007303 * 'trusted' attributes support
7304 */
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02007305static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler,
Al Virob2968212016-04-10 20:48:24 -04007306 struct dentry *unused, struct inode *inode,
7307 const char *name, void *buffer, size_t size)
Mark Fasheh99219ae2008-10-07 14:52:59 -07007308{
Al Virob2968212016-04-10 20:48:24 -04007309 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED,
Christoph Hellwig431547b2009-11-13 09:52:56 +00007310 name, buffer, size);
Mark Fasheh99219ae2008-10-07 14:52:59 -07007311}
7312
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02007313static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler,
Al Viro59301222016-05-27 10:19:30 -04007314 struct dentry *unused, struct inode *inode,
7315 const char *name, const void *value,
7316 size_t size, int flags)
Mark Fasheh99219ae2008-10-07 14:52:59 -07007317{
Al Viro59301222016-05-27 10:19:30 -04007318 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED,
Christoph Hellwig431547b2009-11-13 09:52:56 +00007319 name, value, size, flags);
Mark Fasheh99219ae2008-10-07 14:52:59 -07007320}
7321
Stephen Hemminger537d81c2010-05-13 17:53:22 -07007322const struct xattr_handler ocfs2_xattr_trusted_handler = {
Mark Fasheh99219ae2008-10-07 14:52:59 -07007323 .prefix = XATTR_TRUSTED_PREFIX,
Mark Fasheh99219ae2008-10-07 14:52:59 -07007324 .get = ocfs2_xattr_trusted_get,
7325 .set = ocfs2_xattr_trusted_set,
7326};
7327
Mark Fasheh99219ae2008-10-07 14:52:59 -07007328/*
7329 * 'user' attributes support
7330 */
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02007331static int ocfs2_xattr_user_get(const struct xattr_handler *handler,
Andreas Gruenbacher84d86e62016-05-25 12:46:47 +02007332 struct dentry *unused, struct inode *inode,
Al Virob2968212016-04-10 20:48:24 -04007333 const char *name, void *buffer, size_t size)
Mark Fasheh99219ae2008-10-07 14:52:59 -07007334{
Al Virob2968212016-04-10 20:48:24 -04007335 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Mark Fasheh99219ae2008-10-07 14:52:59 -07007336
Mark Fasheh99219ae2008-10-07 14:52:59 -07007337 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
7338 return -EOPNOTSUPP;
Al Virob2968212016-04-10 20:48:24 -04007339 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
Mark Fasheh99219ae2008-10-07 14:52:59 -07007340 buffer, size);
7341}
7342
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02007343static int ocfs2_xattr_user_set(const struct xattr_handler *handler,
Al Viro59301222016-05-27 10:19:30 -04007344 struct dentry *unused, struct inode *inode,
7345 const char *name, const void *value,
7346 size_t size, int flags)
Mark Fasheh99219ae2008-10-07 14:52:59 -07007347{
Al Viro59301222016-05-27 10:19:30 -04007348 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Mark Fasheh99219ae2008-10-07 14:52:59 -07007349
Mark Fasheh99219ae2008-10-07 14:52:59 -07007350 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
7351 return -EOPNOTSUPP;
7352
Al Viro59301222016-05-27 10:19:30 -04007353 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER,
Christoph Hellwig431547b2009-11-13 09:52:56 +00007354 name, value, size, flags);
Mark Fasheh99219ae2008-10-07 14:52:59 -07007355}
7356
Stephen Hemminger537d81c2010-05-13 17:53:22 -07007357const struct xattr_handler ocfs2_xattr_user_handler = {
Mark Fasheh99219ae2008-10-07 14:52:59 -07007358 .prefix = XATTR_USER_PREFIX,
Mark Fasheh99219ae2008-10-07 14:52:59 -07007359 .get = ocfs2_xattr_user_get,
7360 .set = ocfs2_xattr_user_set,
7361};