blob: f9c1c64782d39ec36fabf800653772f8c5b24280 [file] [log] [blame]
Dave Chinnerfde22272013-08-12 20:49:39 +10001/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * Copyright (c) 2013 Red Hat, Inc.
4 * All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it would be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19#include "xfs.h"
20#include "xfs_fs.h"
Dave Chinner70a98832013-10-23 10:36:05 +110021#include "xfs_shared.h"
Dave Chinner239880e2013-10-23 10:50:10 +110022#include "xfs_format.h"
23#include "xfs_log_format.h"
24#include "xfs_trans_resv.h"
Dave Chinnerfde22272013-08-12 20:49:39 +100025#include "xfs_bit.h"
Dave Chinnerfde22272013-08-12 20:49:39 +100026#include "xfs_mount.h"
Dave Chinner57062782013-10-15 09:17:51 +110027#include "xfs_da_format.h"
Dave Chinnerfde22272013-08-12 20:49:39 +100028#include "xfs_da_btree.h"
Dave Chinnerfde22272013-08-12 20:49:39 +100029#include "xfs_inode.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110030#include "xfs_alloc.h"
31#include "xfs_attr_remote.h"
Dave Chinner239880e2013-10-23 10:50:10 +110032#include "xfs_trans.h"
Dave Chinnerfde22272013-08-12 20:49:39 +100033#include "xfs_inode_item.h"
34#include "xfs_bmap.h"
35#include "xfs_attr.h"
36#include "xfs_attr_leaf.h"
37#include "xfs_error.h"
38#include "xfs_quota.h"
39#include "xfs_trace.h"
Dave Chinner4bceb182013-10-29 22:11:51 +110040#include "xfs_dir2.h"
Dave Chinnerfde22272013-08-12 20:49:39 +100041
42/*
43 * Look at all the extents for this logical region,
44 * invalidate any buffers that are incore/in transactions.
45 */
46STATIC int
47xfs_attr3_leaf_freextent(
48 struct xfs_trans **trans,
49 struct xfs_inode *dp,
50 xfs_dablk_t blkno,
51 int blkcnt)
52{
53 struct xfs_bmbt_irec map;
54 struct xfs_buf *bp;
55 xfs_dablk_t tblkno;
56 xfs_daddr_t dblkno;
57 int tblkcnt;
58 int dblkcnt;
59 int nmap;
60 int error;
61
62 /*
63 * Roll through the "value", invalidating the attribute value's
64 * blocks.
65 */
66 tblkno = blkno;
67 tblkcnt = blkcnt;
68 while (tblkcnt > 0) {
69 /*
70 * Try to remember where we decided to put the value.
71 */
72 nmap = 1;
73 error = xfs_bmapi_read(dp, (xfs_fileoff_t)tblkno, tblkcnt,
74 &map, &nmap, XFS_BMAPI_ATTRFORK);
75 if (error) {
Eric Sandeend99831f2014-06-22 15:03:54 +100076 return error;
Dave Chinnerfde22272013-08-12 20:49:39 +100077 }
78 ASSERT(nmap == 1);
79 ASSERT(map.br_startblock != DELAYSTARTBLOCK);
80
81 /*
82 * If it's a hole, these are already unmapped
83 * so there's nothing to invalidate.
84 */
85 if (map.br_startblock != HOLESTARTBLOCK) {
86
87 dblkno = XFS_FSB_TO_DADDR(dp->i_mount,
88 map.br_startblock);
89 dblkcnt = XFS_FSB_TO_BB(dp->i_mount,
90 map.br_blockcount);
91 bp = xfs_trans_get_buf(*trans,
92 dp->i_mount->m_ddev_targp,
93 dblkno, dblkcnt, 0);
94 if (!bp)
Dave Chinner24513372014-06-25 14:58:08 +100095 return -ENOMEM;
Dave Chinnerfde22272013-08-12 20:49:39 +100096 xfs_trans_binval(*trans, bp);
97 /*
98 * Roll to next transaction.
99 */
100 error = xfs_trans_roll(trans, dp);
101 if (error)
Eric Sandeend99831f2014-06-22 15:03:54 +1000102 return error;
Dave Chinnerfde22272013-08-12 20:49:39 +1000103 }
104
105 tblkno += map.br_blockcount;
106 tblkcnt -= map.br_blockcount;
107 }
108
Eric Sandeend99831f2014-06-22 15:03:54 +1000109 return 0;
Dave Chinnerfde22272013-08-12 20:49:39 +1000110}
111
112/*
113 * Invalidate all of the "remote" value regions pointed to by a particular
114 * leaf block.
115 * Note that we must release the lock on the buffer so that we are not
116 * caught holding something that the logging code wants to flush to disk.
117 */
118STATIC int
119xfs_attr3_leaf_inactive(
120 struct xfs_trans **trans,
121 struct xfs_inode *dp,
122 struct xfs_buf *bp)
123{
124 struct xfs_attr_leafblock *leaf;
125 struct xfs_attr3_icleaf_hdr ichdr;
126 struct xfs_attr_leaf_entry *entry;
127 struct xfs_attr_leaf_name_remote *name_rmt;
128 struct xfs_attr_inactive_list *list;
129 struct xfs_attr_inactive_list *lp;
130 int error;
131 int count;
132 int size;
133 int tmp;
134 int i;
Brian Foster2f661242015-04-13 11:26:02 +1000135 struct xfs_mount *mp = bp->b_target->bt_mount;
Dave Chinnerfde22272013-08-12 20:49:39 +1000136
137 leaf = bp->b_addr;
Brian Foster2f661242015-04-13 11:26:02 +1000138 xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf);
Dave Chinnerfde22272013-08-12 20:49:39 +1000139
140 /*
141 * Count the number of "remote" value extents.
142 */
143 count = 0;
144 entry = xfs_attr3_leaf_entryp(leaf);
145 for (i = 0; i < ichdr.count; entry++, i++) {
146 if (be16_to_cpu(entry->nameidx) &&
147 ((entry->flags & XFS_ATTR_LOCAL) == 0)) {
148 name_rmt = xfs_attr3_leaf_name_remote(leaf, i);
149 if (name_rmt->valueblk)
150 count++;
151 }
152 }
153
154 /*
155 * If there are no "remote" values, we're done.
156 */
157 if (count == 0) {
158 xfs_trans_brelse(*trans, bp);
159 return 0;
160 }
161
162 /*
163 * Allocate storage for a list of all the "remote" value extents.
164 */
165 size = count * sizeof(xfs_attr_inactive_list_t);
166 list = kmem_alloc(size, KM_SLEEP);
167
168 /*
169 * Identify each of the "remote" value extents.
170 */
171 lp = list;
172 entry = xfs_attr3_leaf_entryp(leaf);
173 for (i = 0; i < ichdr.count; entry++, i++) {
174 if (be16_to_cpu(entry->nameidx) &&
175 ((entry->flags & XFS_ATTR_LOCAL) == 0)) {
176 name_rmt = xfs_attr3_leaf_name_remote(leaf, i);
177 if (name_rmt->valueblk) {
178 lp->valueblk = be32_to_cpu(name_rmt->valueblk);
179 lp->valuelen = xfs_attr3_rmt_blocks(dp->i_mount,
180 be32_to_cpu(name_rmt->valuelen));
181 lp++;
182 }
183 }
184 }
185 xfs_trans_brelse(*trans, bp); /* unlock for trans. in freextent() */
186
187 /*
188 * Invalidate each of the "remote" value extents.
189 */
190 error = 0;
191 for (lp = list, i = 0; i < count; i++, lp++) {
192 tmp = xfs_attr3_leaf_freextent(trans, dp,
193 lp->valueblk, lp->valuelen);
194
195 if (error == 0)
196 error = tmp; /* save only the 1st errno */
197 }
198
199 kmem_free(list);
200 return error;
201}
202
203/*
204 * Recurse (gasp!) through the attribute nodes until we find leaves.
205 * We're doing a depth-first traversal in order to invalidate everything.
206 */
207STATIC int
208xfs_attr3_node_inactive(
209 struct xfs_trans **trans,
210 struct xfs_inode *dp,
211 struct xfs_buf *bp,
212 int level)
213{
214 xfs_da_blkinfo_t *info;
215 xfs_da_intnode_t *node;
216 xfs_dablk_t child_fsb;
217 xfs_daddr_t parent_blkno, child_blkno;
218 int error, i;
219 struct xfs_buf *child_bp;
220 struct xfs_da_node_entry *btree;
221 struct xfs_da3_icnode_hdr ichdr;
222
223 /*
224 * Since this code is recursive (gasp!) we must protect ourselves.
225 */
226 if (level > XFS_DA_NODE_MAXDEPTH) {
227 xfs_trans_brelse(*trans, bp); /* no locks for later trans */
Dave Chinner24513372014-06-25 14:58:08 +1000228 return -EIO;
Dave Chinnerfde22272013-08-12 20:49:39 +1000229 }
230
231 node = bp->b_addr;
Dave Chinner01ba43b2013-10-29 22:11:52 +1100232 dp->d_ops->node_hdr_from_disk(&ichdr, node);
Dave Chinnerfde22272013-08-12 20:49:39 +1000233 parent_blkno = bp->b_bn;
234 if (!ichdr.count) {
235 xfs_trans_brelse(*trans, bp);
236 return 0;
237 }
Dave Chinner4bceb182013-10-29 22:11:51 +1100238 btree = dp->d_ops->node_tree_p(node);
Dave Chinnerfde22272013-08-12 20:49:39 +1000239 child_fsb = be32_to_cpu(btree[0].before);
240 xfs_trans_brelse(*trans, bp); /* no locks for later trans */
241
242 /*
243 * If this is the node level just above the leaves, simply loop
244 * over the leaves removing all of them. If this is higher up
245 * in the tree, recurse downward.
246 */
247 for (i = 0; i < ichdr.count; i++) {
248 /*
249 * Read the subsidiary block to see what we have to work with.
250 * Don't do this in a transaction. This is a depth-first
251 * traversal of the tree so we may deal with many blocks
252 * before we come back to this one.
253 */
254 error = xfs_da3_node_read(*trans, dp, child_fsb, -2, &child_bp,
255 XFS_ATTR_FORK);
256 if (error)
Eric Sandeend99831f2014-06-22 15:03:54 +1000257 return error;
Dave Chinnerfde22272013-08-12 20:49:39 +1000258 if (child_bp) {
259 /* save for re-read later */
260 child_blkno = XFS_BUF_ADDR(child_bp);
261
262 /*
263 * Invalidate the subtree, however we have to.
264 */
265 info = child_bp->b_addr;
266 switch (info->magic) {
267 case cpu_to_be16(XFS_DA_NODE_MAGIC):
268 case cpu_to_be16(XFS_DA3_NODE_MAGIC):
269 error = xfs_attr3_node_inactive(trans, dp,
270 child_bp, level + 1);
271 break;
272 case cpu_to_be16(XFS_ATTR_LEAF_MAGIC):
273 case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC):
274 error = xfs_attr3_leaf_inactive(trans, dp,
275 child_bp);
276 break;
277 default:
Dave Chinner24513372014-06-25 14:58:08 +1000278 error = -EIO;
Dave Chinnerfde22272013-08-12 20:49:39 +1000279 xfs_trans_brelse(*trans, child_bp);
280 break;
281 }
282 if (error)
283 return error;
284
285 /*
286 * Remove the subsidiary block from the cache
287 * and from the log.
288 */
289 error = xfs_da_get_buf(*trans, dp, 0, child_blkno,
290 &child_bp, XFS_ATTR_FORK);
291 if (error)
292 return error;
293 xfs_trans_binval(*trans, child_bp);
294 }
295
296 /*
297 * If we're not done, re-read the parent to get the next
298 * child block number.
299 */
300 if (i + 1 < ichdr.count) {
301 error = xfs_da3_node_read(*trans, dp, 0, parent_blkno,
302 &bp, XFS_ATTR_FORK);
303 if (error)
304 return error;
305 child_fsb = be32_to_cpu(btree[i + 1].before);
306 xfs_trans_brelse(*trans, bp);
307 }
308 /*
309 * Atomically commit the whole invalidate stuff.
310 */
311 error = xfs_trans_roll(trans, dp);
312 if (error)
313 return error;
314 }
315
316 return 0;
317}
318
319/*
320 * Indiscriminately delete the entire attribute fork
321 *
322 * Recurse (gasp!) through the attribute nodes until we find leaves.
323 * We're doing a depth-first traversal in order to invalidate everything.
324 */
325int
326xfs_attr3_root_inactive(
327 struct xfs_trans **trans,
328 struct xfs_inode *dp)
329{
330 struct xfs_da_blkinfo *info;
331 struct xfs_buf *bp;
332 xfs_daddr_t blkno;
333 int error;
334
335 /*
336 * Read block 0 to see what we have to work with.
337 * We only get here if we have extents, since we remove
338 * the extents in reverse order the extent containing
339 * block 0 must still be there.
340 */
341 error = xfs_da3_node_read(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK);
342 if (error)
343 return error;
344 blkno = bp->b_bn;
345
346 /*
347 * Invalidate the tree, even if the "tree" is only a single leaf block.
348 * This is a depth-first traversal!
349 */
350 info = bp->b_addr;
351 switch (info->magic) {
352 case cpu_to_be16(XFS_DA_NODE_MAGIC):
353 case cpu_to_be16(XFS_DA3_NODE_MAGIC):
354 error = xfs_attr3_node_inactive(trans, dp, bp, 1);
355 break;
356 case cpu_to_be16(XFS_ATTR_LEAF_MAGIC):
357 case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC):
358 error = xfs_attr3_leaf_inactive(trans, dp, bp);
359 break;
360 default:
Dave Chinner24513372014-06-25 14:58:08 +1000361 error = -EIO;
Dave Chinnerfde22272013-08-12 20:49:39 +1000362 xfs_trans_brelse(*trans, bp);
363 break;
364 }
365 if (error)
366 return error;
367
368 /*
369 * Invalidate the incore copy of the root block.
370 */
371 error = xfs_da_get_buf(*trans, dp, 0, blkno, &bp, XFS_ATTR_FORK);
372 if (error)
373 return error;
374 xfs_trans_binval(*trans, bp); /* remove from cache */
375 /*
376 * Commit the invalidate and start the next transaction.
377 */
378 error = xfs_trans_roll(trans, dp);
379
380 return error;
381}
382
383int
384xfs_attr_inactive(xfs_inode_t *dp)
385{
386 xfs_trans_t *trans;
387 xfs_mount_t *mp;
388 int error;
389
390 mp = dp->i_mount;
391 ASSERT(! XFS_NOT_DQATTACHED(mp, dp));
392
393 xfs_ilock(dp, XFS_ILOCK_SHARED);
394 if (!xfs_inode_hasattr(dp) ||
395 dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
396 xfs_iunlock(dp, XFS_ILOCK_SHARED);
397 return 0;
398 }
399 xfs_iunlock(dp, XFS_ILOCK_SHARED);
400
401 /*
402 * Start our first transaction of the day.
403 *
404 * All future transactions during this code must be "chained" off
405 * this one via the trans_dup() call. All transactions will contain
406 * the inode, and the inode will always be marked with trans_ihold().
407 * Since the inode will be locked in all transactions, we must log
408 * the inode in every transaction to let it float upward through
409 * the log.
410 */
411 trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL);
Jie Liu3d3c8b52013-08-12 20:49:59 +1000412 error = xfs_trans_reserve(trans, &M_RES(mp)->tr_attrinval, 0, 0);
413 if (error) {
Dave Chinnerfde22272013-08-12 20:49:39 +1000414 xfs_trans_cancel(trans, 0);
Eric Sandeend99831f2014-06-22 15:03:54 +1000415 return error;
Dave Chinnerfde22272013-08-12 20:49:39 +1000416 }
417 xfs_ilock(dp, XFS_ILOCK_EXCL);
418
419 /*
420 * No need to make quota reservations here. We expect to release some
421 * blocks, not allocate, in the common case.
422 */
423 xfs_trans_ijoin(trans, dp, 0);
424
425 /*
426 * Decide on what work routines to call based on the inode size.
427 */
428 if (!xfs_inode_hasattr(dp) ||
429 dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
430 error = 0;
431 goto out;
432 }
433 error = xfs_attr3_root_inactive(&trans, dp);
434 if (error)
435 goto out;
436
437 error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0);
438 if (error)
439 goto out;
440
441 error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES);
442 xfs_iunlock(dp, XFS_ILOCK_EXCL);
443
Eric Sandeend99831f2014-06-22 15:03:54 +1000444 return error;
Dave Chinnerfde22272013-08-12 20:49:39 +1000445
446out:
447 xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
448 xfs_iunlock(dp, XFS_ILOCK_EXCL);
Eric Sandeend99831f2014-06-22 15:03:54 +1000449 return error;
Dave Chinnerfde22272013-08-12 20:49:39 +1000450}