blob: e54f8c08bda832b2b25c93495b796fa943a13d8e [file] [log] [blame]
Chao Yu7c1a0002018-09-12 09:16:07 +08001// SPDX-License-Identifier: GPL-2.0
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09002/*
Jaegeuk Kim57397d82012-11-02 17:11:10 +09003 * fs/f2fs/namei.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
Jaegeuk Kim57397d82012-11-02 17:11:10 +09007 */
8#include <linux/fs.h>
9#include <linux/f2fs_fs.h>
10#include <linux/pagemap.h>
11#include <linux/sched.h>
12#include <linux/ctype.h>
Jaegeuk Kim428e3bc2019-02-25 09:46:45 -080013#include <linux/random.h>
Chao Yu50732df2014-06-19 16:23:19 +080014#include <linux/dcache.h>
Jaegeuk Kimfeb7cbb2015-04-15 13:49:55 -070015#include <linux/namei.h>
Chao Yu0abd6752017-07-09 00:13:07 +080016#include <linux/quotaops.h>
Jaegeuk Kim57397d82012-11-02 17:11:10 +090017
18#include "f2fs.h"
Jaegeuk Kim953a3e22013-03-21 15:21:57 +090019#include "node.h"
Daniel Rosenberg43549942018-08-20 19:21:43 -070020#include "segment.h"
Jaegeuk Kim57397d82012-11-02 17:11:10 +090021#include "xattr.h"
22#include "acl.h"
Namjae Jeona2a4a7e2013-04-20 01:28:40 +090023#include <trace/events/f2fs.h>
Jaegeuk Kim57397d82012-11-02 17:11:10 +090024
Yangtao Lic0abbdf2023-03-19 15:58:22 +080025static inline bool is_extension_exist(const unsigned char *s, const char *sub,
Jaegeuk Kim2724daf62023-06-06 10:17:47 -070026 bool tmp_ext, bool tmp_dot)
Sheng Yong787caf12022-11-11 18:08:29 +080027{
28 size_t slen = strlen(s);
29 size_t sublen = strlen(sub);
30 int i;
31
32 if (sublen == 1 && *sub == '*')
Yangtao Lic0abbdf2023-03-19 15:58:22 +080033 return true;
Sheng Yong787caf12022-11-11 18:08:29 +080034
35 /*
36 * filename format of multimedia file should be defined as:
37 * "filename + '.' + extension + (optional: '.' + temp extension)".
38 */
39 if (slen < sublen + 2)
Yangtao Lic0abbdf2023-03-19 15:58:22 +080040 return false;
Sheng Yong787caf12022-11-11 18:08:29 +080041
42 if (!tmp_ext) {
43 /* file has no temp extension */
44 if (s[slen - sublen - 1] != '.')
Yangtao Lic0abbdf2023-03-19 15:58:22 +080045 return false;
Sheng Yong787caf12022-11-11 18:08:29 +080046 return !strncasecmp(s + slen - sublen, sub, sublen);
47 }
48
49 for (i = 1; i < slen - sublen; i++) {
50 if (s[i] != '.')
51 continue;
Jaegeuk Kim2724daf62023-06-06 10:17:47 -070052 if (!strncasecmp(s + i + 1, sub, sublen)) {
53 if (!tmp_dot)
54 return true;
55 if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')
56 return true;
57 }
Sheng Yong787caf12022-11-11 18:08:29 +080058 }
59
Yangtao Lic0abbdf2023-03-19 15:58:22 +080060 return false;
Sheng Yong787caf12022-11-11 18:08:29 +080061}
62
Jaegeuk Kim2724daf62023-06-06 10:17:47 -070063static inline bool is_temperature_extension(const unsigned char *s, const char *sub)
64{
65 return is_extension_exist(s, sub, true, false);
66}
67
68static inline bool is_compress_extension(const unsigned char *s, const char *sub)
69{
70 return is_extension_exist(s, sub, true, true);
71}
72
Sheng Yong787caf12022-11-11 18:08:29 +080073int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
74 bool hot, bool set)
75{
76 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
77 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
78 int hot_count = sbi->raw_super->hot_ext_count;
79 int total_count = cold_count + hot_count;
80 int start, count;
81 int i;
82
83 if (set) {
84 if (total_count == F2FS_MAX_EXTENSION)
85 return -EINVAL;
86 } else {
87 if (!hot && !cold_count)
88 return -EINVAL;
89 if (hot && !hot_count)
90 return -EINVAL;
91 }
92
93 if (hot) {
94 start = cold_count;
95 count = total_count;
96 } else {
97 start = 0;
98 count = cold_count;
99 }
100
101 for (i = start; i < count; i++) {
102 if (strcmp(name, extlist[i]))
103 continue;
104
105 if (set)
106 return -EINVAL;
107
108 memcpy(extlist[i], extlist[i + 1],
109 F2FS_EXTENSION_LEN * (total_count - i - 1));
110 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
111 if (hot)
112 sbi->raw_super->hot_ext_count = hot_count - 1;
113 else
114 sbi->raw_super->extension_count =
115 cpu_to_le32(cold_count - 1);
116 return 0;
117 }
118
119 if (!set)
120 return -EINVAL;
121
122 if (hot) {
123 memcpy(extlist[count], name, strlen(name));
124 sbi->raw_super->hot_ext_count = hot_count + 1;
125 } else {
126 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
127
128 memcpy(buf, &extlist[cold_count],
129 F2FS_EXTENSION_LEN * hot_count);
130 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
131 memcpy(extlist[cold_count], name, strlen(name));
132 memcpy(&extlist[cold_count + 1], buf,
133 F2FS_EXTENSION_LEN * hot_count);
134 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
135 }
136 return 0;
137}
138
139static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
140 struct inode *inode, const unsigned char *name)
141{
142 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
143 unsigned char (*noext)[F2FS_EXTENSION_LEN] =
144 F2FS_OPTION(sbi).noextensions;
145 unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
146 unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
147 unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
148 int i, cold_count, hot_count;
149
150 if (!f2fs_sb_has_compression(sbi))
151 return;
152
153 if (S_ISDIR(inode->i_mode))
154 goto inherit_comp;
155
156 /* This name comes only from normal files. */
157 if (!name)
158 return;
159
160 /* Don't compress hot files. */
161 f2fs_down_read(&sbi->sb_lock);
162 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
163 hot_count = sbi->raw_super->hot_ext_count;
164 for (i = cold_count; i < cold_count + hot_count; i++)
Jaegeuk Kim2724daf62023-06-06 10:17:47 -0700165 if (is_temperature_extension(name, extlist[i]))
Sheng Yong787caf12022-11-11 18:08:29 +0800166 break;
167 f2fs_up_read(&sbi->sb_lock);
168 if (i < (cold_count + hot_count))
169 return;
170
171 /* Don't compress unallowed extension. */
172 for (i = 0; i < noext_cnt; i++)
Jaegeuk Kim2724daf62023-06-06 10:17:47 -0700173 if (is_compress_extension(name, noext[i]))
Sheng Yong787caf12022-11-11 18:08:29 +0800174 return;
175
176 /* Compress wanting extension. */
177 for (i = 0; i < ext_cnt; i++) {
Jaegeuk Kim2724daf62023-06-06 10:17:47 -0700178 if (is_compress_extension(name, ext[i])) {
Sheng Yong787caf12022-11-11 18:08:29 +0800179 set_compress_context(inode);
180 return;
181 }
182 }
183inherit_comp:
184 /* Inherit the {no-}compression flag in directory */
185 if (F2FS_I(dir)->i_flags & F2FS_NOCOMP_FL) {
186 F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
187 f2fs_mark_inode_dirty_sync(inode, true);
188 } else if (F2FS_I(dir)->i_flags & F2FS_COMPR_FL) {
189 set_compress_context(inode);
190 }
191}
192
Sheng Yongb16bcaa2022-11-11 18:08:30 +0800193/*
194 * Set file's temperature for hot/cold data separation
195 */
196static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
197 const unsigned char *name)
198{
199 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
200 int i, cold_count, hot_count;
201
202 f2fs_down_read(&sbi->sb_lock);
203 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
204 hot_count = sbi->raw_super->hot_ext_count;
205 for (i = 0; i < cold_count + hot_count; i++)
Jaegeuk Kim2724daf62023-06-06 10:17:47 -0700206 if (is_temperature_extension(name, extlist[i]))
Sheng Yongb16bcaa2022-11-11 18:08:30 +0800207 break;
208 f2fs_up_read(&sbi->sb_lock);
209
210 if (i == cold_count + hot_count)
211 return;
212
213 if (i < cold_count)
214 file_set_cold(inode);
215 else
216 file_set_hot(inode);
217}
218
Christian Braunerf2d40142023-01-13 12:49:25 +0100219static struct inode *f2fs_new_inode(struct mnt_idmap *idmap,
Sheng Yong787caf12022-11-11 18:08:29 +0800220 struct inode *dir, umode_t mode,
221 const char *name)
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900222{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700223 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900224 nid_t ino;
225 struct inode *inode;
226 bool nid_free = false;
Eric Biggerse075b692020-09-16 21:11:27 -0700227 bool encrypt = false;
Chao Yu6afc6622017-09-06 21:59:50 +0800228 int xattr_size = 0;
Gu Zhenge4795562013-09-27 18:08:30 +0800229 int err;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900230
Jaegeuk Kima014e032014-06-20 21:44:02 -0700231 inode = new_inode(dir->i_sb);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900232 if (!inode)
233 return ERR_PTR(-ENOMEM);
234
Chao Yu4d57b862018-05-30 00:20:41 +0800235 if (!f2fs_alloc_nid(sbi, &ino)) {
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900236 err = -ENOSPC;
237 goto fail;
238 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900239
Chao Yu0abd6752017-07-09 00:13:07 +0800240 nid_free = true;
241
Christian Braunerf2d40142023-01-13 12:49:25 +0100242 inode_init_owner(idmap, inode, dir, mode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900243
244 inode->i_ino = ino;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900245 inode->i_blocks = 0;
Jeff Layton11cc6422023-10-04 14:52:21 -0400246 simple_inode_init_ts(inode);
247 F2FS_I(inode)->i_crtime = inode_get_mtime(inode);
Jason A. Donenfelda251c172022-10-05 17:43:22 +0200248 inode->i_generation = get_random_u32();
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900249
Chao Yu1c41e6802018-05-07 20:28:52 +0800250 if (S_ISDIR(inode->i_mode))
251 F2FS_I(inode)->i_current_depth = 1;
252
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900253 err = insert_inode_locked(inode);
254 if (err) {
255 err = -EINVAL;
Jaegeuk Kima21c20f2015-08-16 12:38:15 -0700256 goto fail;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900257 }
Chao Yu622f28a2014-09-24 18:19:10 +0800258
Chao Yu7beb01f2018-10-24 18:34:26 +0800259 if (f2fs_sb_has_project_quota(sbi) &&
Chao Yu59c84402018-04-03 15:08:17 +0800260 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
Chao Yu5c571322017-07-26 00:01:41 +0800261 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
262 else
Christian Brauner64b4cdf2023-01-13 12:49:09 +0100263 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
Chao Yu5c571322017-07-26 00:01:41 +0800264 F2FS_DEF_PROJID);
265
Eric Biggerse075b692020-09-16 21:11:27 -0700266 err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
267 if (err)
268 goto fail_drop;
269
Chao Yu10a26872021-10-28 21:03:05 +0800270 err = f2fs_dquot_initialize(inode);
Chao Yu0abd6752017-07-09 00:13:07 +0800271 if (err)
272 goto fail_drop;
273
Daeho Jeong9ac1e2d2018-01-11 11:26:19 +0900274 set_inode_flag(inode, FI_NEW_INODE);
275
Eric Biggerse075b692020-09-16 21:11:27 -0700276 if (encrypt)
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700277 f2fs_set_encrypted_inode(inode);
278
Chao Yu7beb01f2018-10-24 18:34:26 +0800279 if (f2fs_sb_has_extra_attr(sbi)) {
Chao Yu7a2af762017-07-19 00:19:06 +0800280 set_inode_flag(inode, FI_EXTRA_ATTR);
281 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
282 }
283
Jaegeuk Kim91942322016-05-20 10:13:22 -0700284 if (test_opt(sbi, INLINE_XATTR))
285 set_inode_flag(inode, FI_INLINE_XATTR);
Chao Yu6afc6622017-09-06 21:59:50 +0800286
Jaegeuk Kim01b960e2015-04-23 10:27:21 -0700287 if (f2fs_may_inline_dentry(inode))
Jaegeuk Kim91942322016-05-20 10:13:22 -0700288 set_inode_flag(inode, FI_INLINE_DENTRY);
Chao Yu622f28a2014-09-24 18:19:10 +0800289
Chao Yu7beb01f2018-10-24 18:34:26 +0800290 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
Chao Yu6afc6622017-09-06 21:59:50 +0800291 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
292 if (f2fs_has_inline_xattr(inode))
Chao Yu63189b72018-03-08 14:22:56 +0800293 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
Chao Yu6afc6622017-09-06 21:59:50 +0800294 /* Otherwise, will be 0 */
295 } else if (f2fs_has_inline_xattr(inode) ||
296 f2fs_has_inline_dentry(inode)) {
297 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
298 }
299 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
300
Chao Yu5c571322017-07-26 00:01:41 +0800301 F2FS_I(inode)->i_flags =
302 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
303
Chao Yu11f50202017-08-30 18:04:47 +0800304 if (S_ISDIR(inode->i_mode))
Chao Yu59c84402018-04-03 15:08:17 +0800305 F2FS_I(inode)->i_flags |= F2FS_INDEX_FL;
Chao Yu11f50202017-08-30 18:04:47 +0800306
Chao Yu59c84402018-04-03 15:08:17 +0800307 if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL)
Chao Yu5c571322017-07-26 00:01:41 +0800308 set_inode_flag(inode, FI_PROJ_INHERIT);
309
Sheng Yong787caf12022-11-11 18:08:29 +0800310 /* Check compression first. */
311 set_compress_new_inode(sbi, dir, inode, name);
Chao Yu4c8ff702019-11-01 18:07:14 +0800312
Jaegeuk Kim4cde00d2022-05-31 18:27:09 -0700313 /* Should enable inline_data after compression set */
314 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
315 set_inode_flag(inode, FI_INLINE_DATA);
316
Sheng Yongb16bcaa2022-11-11 18:08:30 +0800317 if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
318 set_file_temperature(sbi, inode, name);
319
Jaegeuk Kim4cde00d2022-05-31 18:27:09 -0700320 stat_inc_inline_xattr(inode);
321 stat_inc_inline_inode(inode);
322 stat_inc_inline_dir(inode);
323
Chao Yu9149a5e2018-10-07 19:06:15 +0800324 f2fs_set_inode_flags(inode);
325
Jaegeuk Kim72840cc2022-12-02 13:51:09 -0800326 f2fs_init_extent_tree(inode);
327
Jaegeuk Kimd70b4f52013-04-25 13:24:33 +0900328 trace_f2fs_new_inode(inode, 0);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900329 return inode;
330
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900331fail:
Jaegeuk Kimd70b4f52013-04-25 13:24:33 +0900332 trace_f2fs_new_inode(inode, err);
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900333 make_bad_inode(inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900334 if (nid_free)
Jaegeuk Kim91942322016-05-20 10:13:22 -0700335 set_inode_flag(inode, FI_FREE_NID);
Jaegeuk Kimc9b63bd2015-06-23 10:36:08 -0700336 iput(inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900337 return ERR_PTR(err);
Chao Yu0abd6752017-07-09 00:13:07 +0800338fail_drop:
339 trace_f2fs_new_inode(inode, err);
340 dquot_drop(inode);
341 inode->i_flags |= S_NOQUOTA;
342 if (nid_free)
343 set_inode_flag(inode, FI_FREE_NID);
344 clear_nlink(inode);
345 unlock_new_inode(inode);
346 iput(inode);
347 return ERR_PTR(err);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900348}
349
Christian Brauner6c960e62023-01-13 12:49:13 +0100350static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
Christian Brauner549c7292021-01-21 14:19:43 +0100351 struct dentry *dentry, umode_t mode, bool excl)
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900352{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700353 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900354 struct inode *inode;
355 nid_t ino = 0;
Gu Zhenge4795562013-09-27 18:08:30 +0800356 int err;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900357
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200358 if (unlikely(f2fs_cp_error(sbi)))
359 return -EIO;
Chao Yu00e09c02019-08-23 17:58:36 +0800360 if (!f2fs_is_checkpoint_ready(sbi))
361 return -ENOSPC;
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200362
Chao Yu10a26872021-10-28 21:03:05 +0800363 err = f2fs_dquot_initialize(dir);
Chao Yu0abd6752017-07-09 00:13:07 +0800364 if (err)
365 return err;
366
Christian Braunerf2d40142023-01-13 12:49:25 +0100367 inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900368 if (IS_ERR(inode))
369 return PTR_ERR(inode);
370
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900371 inode->i_op = &f2fs_file_inode_operations;
372 inode->i_fop = &f2fs_file_operations;
373 inode->i_mapping->a_ops = &f2fs_dblock_aops;
374 ino = inode->i_ino;
375
Gu Zhenge4795562013-09-27 18:08:30 +0800376 f2fs_lock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900377 err = f2fs_add_link(dentry, inode);
378 if (err)
379 goto out;
Jaegeuk Kim44c16152014-09-25 11:55:53 -0700380 f2fs_unlock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900381
Chao Yu4d57b862018-05-30 00:20:41 +0800382 f2fs_alloc_nid_done(sbi, ino);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900383
Al Viro1e2e5472018-05-04 08:23:01 -0400384 d_instantiate_new(dentry, inode);
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -0800385
386 if (IS_DIRSYNC(dir))
387 f2fs_sync_fs(sbi->sb, 1);
Jaegeuk Kim9bb02c32017-04-11 19:01:26 -0700388
389 f2fs_balance_fs(sbi, true);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900390 return 0;
391out:
Chao Yu4d57b862018-05-30 00:20:41 +0800392 f2fs_handle_failed_inode(inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900393 return err;
394}
395
396static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
397 struct dentry *dentry)
398{
David Howells2b0143b2015-03-17 22:25:59 +0000399 struct inode *inode = d_inode(old_dentry);
Jaegeuk Kim40813632014-09-02 15:31:18 -0700400 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
Gu Zhenge4795562013-09-27 18:08:30 +0800401 int err;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900402
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200403 if (unlikely(f2fs_cp_error(sbi)))
404 return -EIO;
Chao Yu00e09c02019-08-23 17:58:36 +0800405 if (!f2fs_is_checkpoint_ready(sbi))
406 return -ENOSPC;
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200407
Eric Biggersb05157e2017-11-29 12:35:29 -0800408 err = fscrypt_prepare_link(old_dentry, dir, dentry);
409 if (err)
410 return err;
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700411
Chao Yu5c571322017-07-26 00:01:41 +0800412 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
413 (!projid_eq(F2FS_I(dir)->i_projid,
414 F2FS_I(old_dentry->d_inode)->i_projid)))
415 return -EXDEV;
416
Chao Yu10a26872021-10-28 21:03:05 +0800417 err = f2fs_dquot_initialize(dir);
Chao Yu0abd6752017-07-09 00:13:07 +0800418 if (err)
419 return err;
420
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800421 f2fs_balance_fs(sbi, true);
Jaegeuk Kim1efef832012-12-19 16:25:21 +0900422
Jeff Laytonc62ebd32023-07-05 15:01:08 -0400423 inode_set_ctime_current(inode);
Jaegeuk Kim6f6fd832013-05-22 12:06:26 +0900424 ihold(inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900425
Jaegeuk Kim91942322016-05-20 10:13:22 -0700426 set_inode_flag(inode, FI_INC_LINK);
Gu Zhenge4795562013-09-27 18:08:30 +0800427 f2fs_lock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900428 err = f2fs_add_link(dentry, inode);
429 if (err)
430 goto out;
Jaegeuk Kim44c16152014-09-25 11:55:53 -0700431 f2fs_unlock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900432
433 d_instantiate(dentry, inode);
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -0800434
435 if (IS_DIRSYNC(dir))
436 f2fs_sync_fs(sbi->sb, 1);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900437 return 0;
438out:
Jaegeuk Kim91942322016-05-20 10:13:22 -0700439 clear_inode_flag(inode, FI_INC_LINK);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900440 iput(inode);
Jaegeuk Kim44c16152014-09-25 11:55:53 -0700441 f2fs_unlock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900442 return err;
443}
444
445struct dentry *f2fs_get_parent(struct dentry *child)
446{
Chao Yu91246c22016-07-19 08:27:47 +0800447 struct page *page;
Al Viro80e5d1ff52021-04-15 19:46:50 -0400448 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
Yi Zhuang5f029c02021-04-06 09:47:35 +0800449
Chao Yu91246c22016-07-19 08:27:47 +0800450 if (!ino) {
451 if (IS_ERR(page))
452 return ERR_CAST(page);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900453 return ERR_PTR(-ENOENT);
Chao Yu91246c22016-07-19 08:27:47 +0800454 }
Al Virofc640052016-04-10 01:33:30 -0400455 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900456}
457
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700458static int __recover_dot_dentries(struct inode *dir, nid_t pino)
459{
460 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
461 struct qstr dot = QSTR_INIT(".", 1);
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700462 struct f2fs_dir_entry *de;
463 struct page *page;
464 int err = 0;
465
Chao Yu4e0d8362015-12-30 17:40:31 +0800466 if (f2fs_readonly(sbi->sb)) {
Joe Perchesdcbb4c12019-06-18 17:48:42 +0800467 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
468 dir->i_ino, pino);
Chao Yu4e0d8362015-12-30 17:40:31 +0800469 return 0;
470 }
471
Chao Yu12662d12022-03-29 00:02:53 +0800472 if (!S_ISDIR(dir->i_mode)) {
473 f2fs_err(sbi, "inconsistent inode status, skip recovering inline_dots inode (ino:%lu, i_mode:%u, pino:%u)",
474 dir->i_ino, dir->i_mode, pino);
475 set_sbi_flag(sbi, SBI_NEED_FSCK);
476 return -ENOTDIR;
477 }
478
Chao Yu10a26872021-10-28 21:03:05 +0800479 err = f2fs_dquot_initialize(dir);
Chao Yua6d3a472017-07-24 17:12:06 +0800480 if (err)
481 return err;
482
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800483 f2fs_balance_fs(sbi, true);
Chao Yud5384172015-12-24 18:03:29 +0800484
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700485 f2fs_lock_op(sbi);
486
487 de = f2fs_find_entry(dir, &dot, &page);
488 if (de) {
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700489 f2fs_put_page(page, 0);
Jaegeuk Kim42d96402016-05-25 14:29:11 -0700490 } else if (IS_ERR(page)) {
491 err = PTR_ERR(page);
492 goto out;
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700493 } else {
Chao Yu4d57b862018-05-30 00:20:41 +0800494 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700495 if (err)
496 goto out;
497 }
498
Chao Yuff6584a2023-11-16 14:25:54 +0800499 de = f2fs_find_entry(dir, &dotdot_name, &page);
Yunlong Songbdbc90f2018-02-28 20:31:52 +0800500 if (de)
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700501 f2fs_put_page(page, 0);
Yunlong Songbdbc90f2018-02-28 20:31:52 +0800502 else if (IS_ERR(page))
Jaegeuk Kim42d96402016-05-25 14:29:11 -0700503 err = PTR_ERR(page);
Yunlong Songbdbc90f2018-02-28 20:31:52 +0800504 else
Chao Yuff6584a2023-11-16 14:25:54 +0800505 err = f2fs_do_add_link(dir, &dotdot_name, NULL, pino, S_IFDIR);
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700506out:
Jaegeuk Kim205b9822016-05-20 09:52:20 -0700507 if (!err)
Jaegeuk Kim91942322016-05-20 10:13:22 -0700508 clear_inode_flag(dir, FI_INLINE_DOTS);
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700509
510 f2fs_unlock_op(sbi);
511 return err;
512}
513
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900514static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
515 unsigned int flags)
516{
517 struct inode *inode = NULL;
518 struct f2fs_dir_entry *de;
519 struct page *page;
Chao Yu0c5e36d2017-10-17 17:33:41 +0800520 struct dentry *new;
521 nid_t ino = -1;
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700522 int err = 0;
Liu Xue8c2b1432016-02-26 06:39:23 +0000523 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
Eric Biggers43c780b2020-05-07 00:59:04 -0700524 struct f2fs_filename fname;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900525
Chao Yu0c5e36d2017-10-17 17:33:41 +0800526 trace_f2fs_lookup_start(dir, dentry, flags);
527
Chao Yu0c5e36d2017-10-17 17:33:41 +0800528 if (dentry->d_name.len > F2FS_NAME_LEN) {
529 err = -ENAMETOOLONG;
530 goto out;
531 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900532
Eric Biggers43c780b2020-05-07 00:59:04 -0700533 err = f2fs_prepare_lookup(dir, dentry, &fname);
Eric Biggersb01531d2019-03-20 11:39:13 -0700534 if (err == -ENOENT)
535 goto out_splice;
536 if (err)
537 goto out;
538 de = __f2fs_find_entry(dir, &fname, &page);
Eric Biggers43c780b2020-05-07 00:59:04 -0700539 f2fs_free_filename(&fname);
Eric Biggersb01531d2019-03-20 11:39:13 -0700540
Jaegeuk Kimeb4246d2016-05-27 10:10:41 -0700541 if (!de) {
Chao Yu0c5e36d2017-10-17 17:33:41 +0800542 if (IS_ERR(page)) {
543 err = PTR_ERR(page);
544 goto out;
545 }
Chao Yu84597b12020-05-27 18:27:51 +0800546 err = -ENOENT;
Chao Yu0c5e36d2017-10-17 17:33:41 +0800547 goto out_splice;
Jaegeuk Kimeb4246d2016-05-27 10:10:41 -0700548 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900549
Jaegeuk Kim06957e82015-04-22 11:40:27 -0700550 ino = le32_to_cpu(de->ino);
Jaegeuk Kim06957e82015-04-22 11:40:27 -0700551 f2fs_put_page(page, 0);
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700552
Jaegeuk Kim06957e82015-04-22 11:40:27 -0700553 inode = f2fs_iget(dir->i_sb, ino);
Chao Yu0c5e36d2017-10-17 17:33:41 +0800554 if (IS_ERR(inode)) {
555 err = PTR_ERR(inode);
556 goto out;
557 }
Jaegeuk Kim510022a2015-03-30 15:07:16 -0700558
Liu Xue8c2b1432016-02-26 06:39:23 +0000559 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
560 err = __recover_dot_dentries(dir, root_ino);
561 if (err)
Chao Yu0c5e36d2017-10-17 17:33:41 +0800562 goto out_iput;
Liu Xue8c2b1432016-02-26 06:39:23 +0000563 }
564
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700565 if (f2fs_has_inline_dots(inode)) {
Jaegeuk Kim06957e82015-04-22 11:40:27 -0700566 err = __recover_dot_dentries(inode, dir->i_ino);
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700567 if (err)
Chao Yu0c5e36d2017-10-17 17:33:41 +0800568 goto out_iput;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900569 }
Chandan Rajendra62230e0d2018-12-12 15:20:11 +0530570 if (IS_ENCRYPTED(dir) &&
Dan Carpenter07fe8d42016-12-16 11:18:15 +0300571 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
572 !fscrypt_has_permitted_context(dir, inode)) {
Joe Perchesdcbb4c12019-06-18 17:48:42 +0800573 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
574 dir->i_ino, inode->i_ino);
Eric Biggersfaac7fd2017-04-07 10:58:39 -0700575 err = -EPERM;
Chao Yu0c5e36d2017-10-17 17:33:41 +0800576 goto out_iput;
Jaegeuk Kim8074bb52016-02-23 09:21:37 -0800577 }
Chao Yu0c5e36d2017-10-17 17:33:41 +0800578out_splice:
Christoph Hellwig5298d4b2022-01-18 07:56:14 +0100579#if IS_ENABLED(CONFIG_UNICODE)
Daniel Rosenberg2c2eb7a2019-07-23 16:05:29 -0700580 if (!inode && IS_CASEFOLDED(dir)) {
581 /* Eventually we want to call d_add_ci(dentry, NULL)
582 * for negative dentries in the encoding case as
583 * well. For now, prevent the negative dentry
584 * from being cached.
585 */
586 trace_f2fs_lookup_end(dir, dentry, ino, err);
587 return NULL;
588 }
589#endif
Chao Yu0c5e36d2017-10-17 17:33:41 +0800590 new = d_splice_alias(inode, dentry);
Wu Bocadfc2f2023-06-01 09:37:59 +0800591 trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
592 ino, IS_ERR(new) ? PTR_ERR(new) : err);
Chao Yu0c5e36d2017-10-17 17:33:41 +0800593 return new;
594out_iput:
Chao Yud7267322016-03-10 22:24:23 +0800595 iput(inode);
Chao Yu0c5e36d2017-10-17 17:33:41 +0800596out:
597 trace_f2fs_lookup_end(dir, dentry, ino, err);
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700598 return ERR_PTR(err);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900599}
600
601static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
602{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700603 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
David Howells2b0143b2015-03-17 22:25:59 +0000604 struct inode *inode = d_inode(dentry);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900605 struct f2fs_dir_entry *de;
606 struct page *page;
Colin Ian Kingdeaf1602020-04-20 23:00:57 +0100607 int err;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900608
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900609 trace_f2fs_unlink_enter(dir, dentry);
Jaegeuk Kim1efef832012-12-19 16:25:21 +0900610
Lihong Kou9a99c17d2020-06-20 10:12:17 +0800611 if (unlikely(f2fs_cp_error(sbi))) {
612 err = -EIO;
613 goto fail;
614 }
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200615
Chao Yu10a26872021-10-28 21:03:05 +0800616 err = f2fs_dquot_initialize(dir);
Chao Yu0abd6752017-07-09 00:13:07 +0800617 if (err)
Lihong Kou9a99c17d2020-06-20 10:12:17 +0800618 goto fail;
Chao Yu10a26872021-10-28 21:03:05 +0800619 err = f2fs_dquot_initialize(inode);
Jaegeuk Kimd8d13892017-10-23 23:50:15 +0200620 if (err)
Lihong Kou9a99c17d2020-06-20 10:12:17 +0800621 goto fail;
Chao Yu0abd6752017-07-09 00:13:07 +0800622
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900623 de = f2fs_find_entry(dir, &dentry->d_name, &page);
Chao Yu91246c22016-07-19 08:27:47 +0800624 if (!de) {
625 if (IS_ERR(page))
626 err = PTR_ERR(page);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900627 goto fail;
Chao Yu91246c22016-07-19 08:27:47 +0800628 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900629
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800630 f2fs_balance_fs(sbi, true);
Jaegeuk Kim00623e62015-12-22 11:56:08 -0800631
Jaegeuk Kimccaaca22013-10-08 10:19:28 +0900632 f2fs_lock_op(sbi);
Chao Yu4d57b862018-05-30 00:20:41 +0800633 err = f2fs_acquire_orphan_inode(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900634 if (err) {
Jaegeuk Kimccaaca22013-10-08 10:19:28 +0900635 f2fs_unlock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900636 f2fs_put_page(page, 0);
637 goto fail;
638 }
Chao Yudbeacf02014-09-24 18:17:04 +0800639 f2fs_delete_entry(de, page, dir, inode);
Jaegeuk Kim14dc00a2022-10-17 17:52:05 -0700640 f2fs_unlock_op(sbi);
641
Christoph Hellwig5298d4b2022-01-18 07:56:14 +0100642#if IS_ENABLED(CONFIG_UNICODE)
Daniel Rosenberg2c2eb7a2019-07-23 16:05:29 -0700643 /* VFS negative dentries are incompatible with Encoding and
644 * Case-insensitiveness. Eventually we'll want avoid
645 * invalidating the dentries here, alongside with returning the
Jack Qiua87aff12020-07-24 16:55:28 +0800646 * negative dentries at f2fs_lookup(), when it is better
Daniel Rosenberg2c2eb7a2019-07-23 16:05:29 -0700647 * supported by the VFS for the CI case.
648 */
649 if (IS_CASEFOLDED(dir))
650 d_invalidate(dentry);
651#endif
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -0800652 if (IS_DIRSYNC(dir))
653 f2fs_sync_fs(sbi->sb, 1);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900654fail:
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900655 trace_f2fs_unlink_exit(inode, err);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900656 return err;
657}
658
Al Viro6b255392015-11-17 10:20:54 -0500659static const char *f2fs_get_link(struct dentry *dentry,
Al Virofceef392015-12-29 15:58:39 -0500660 struct inode *inode,
661 struct delayed_call *done)
Jaegeuk Kimfeb7cbb2015-04-15 13:49:55 -0700662{
Al Virofceef392015-12-29 15:58:39 -0500663 const char *link = page_get_link(dentry, inode, done);
Yi Zhuang5f029c02021-04-06 09:47:35 +0800664
Al Viro680baac2015-05-02 13:32:22 -0400665 if (!IS_ERR(link) && !*link) {
666 /* this is broken symlink case */
Al Virofceef392015-12-29 15:58:39 -0500667 do_delayed_call(done);
668 clear_delayed_call(done);
Al Viro680baac2015-05-02 13:32:22 -0400669 link = ERR_PTR(-ENOENT);
Jaegeuk Kimfeb7cbb2015-04-15 13:49:55 -0700670 }
Al Viro680baac2015-05-02 13:32:22 -0400671 return link;
Jaegeuk Kimfeb7cbb2015-04-15 13:49:55 -0700672}
673
Christian Brauner7a77db92023-01-13 12:49:14 +0100674static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
Christian Brauner549c7292021-01-21 14:19:43 +0100675 struct dentry *dentry, const char *symname)
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900676{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700677 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900678 struct inode *inode;
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -0700679 size_t len = strlen(symname);
Eric Biggers393c0382018-01-11 23:26:49 -0500680 struct fscrypt_str disk_link;
Gu Zhenge4795562013-09-27 18:08:30 +0800681 int err;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900682
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200683 if (unlikely(f2fs_cp_error(sbi)))
684 return -EIO;
Chao Yu00e09c02019-08-23 17:58:36 +0800685 if (!f2fs_is_checkpoint_ready(sbi))
686 return -ENOSPC;
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200687
Eric Biggers393c0382018-01-11 23:26:49 -0500688 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
689 &disk_link);
690 if (err)
691 return err;
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -0700692
Chao Yu10a26872021-10-28 21:03:05 +0800693 err = f2fs_dquot_initialize(dir);
Chao Yu0abd6752017-07-09 00:13:07 +0800694 if (err)
695 return err;
696
Christian Braunerf2d40142023-01-13 12:49:25 +0100697 inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900698 if (IS_ERR(inode))
699 return PTR_ERR(inode);
700
Eric Biggers393c0382018-01-11 23:26:49 -0500701 if (IS_ENCRYPTED(inode))
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -0700702 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
703 else
704 inode->i_op = &f2fs_symlink_inode_operations;
Al Viro21fc61c2015-11-17 01:07:57 -0500705 inode_nohighmem(inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900706 inode->i_mapping->a_ops = &f2fs_dblock_aops;
707
Gu Zhenge4795562013-09-27 18:08:30 +0800708 f2fs_lock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900709 err = f2fs_add_link(dentry, inode);
710 if (err)
Chao Yu4d57b862018-05-30 00:20:41 +0800711 goto out_f2fs_handle_failed_inode;
Jaegeuk Kim44c16152014-09-25 11:55:53 -0700712 f2fs_unlock_op(sbi);
Chao Yu4d57b862018-05-30 00:20:41 +0800713 f2fs_alloc_nid_done(sbi, inode->i_ino);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900714
Eric Biggers393c0382018-01-11 23:26:49 -0500715 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
716 if (err)
717 goto err_out;
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -0700718
Chao Yu922ec352016-02-15 17:54:26 +0800719 err = page_symlink(inode, disk_link.name, disk_link.len);
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -0700720
721err_out:
Al Viro1e2e5472018-05-04 08:23:01 -0400722 d_instantiate_new(dentry, inode);
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -0800723
Jaegeuk Kimd0cae972015-04-15 13:37:53 -0700724 /*
725 * Let's flush symlink data in order to avoid broken symlink as much as
726 * possible. Nevertheless, fsyncing is the best way, but there is no
727 * way to get a file descriptor in order to flush that.
728 *
729 * Note that, it needs to do dir->fsync to make this recoverable.
730 * If the symlink path is stored into inline_data, there is no
731 * performance regression.
732 */
Chao Yua6be0142015-10-22 18:23:08 +0800733 if (!err) {
Chao Yu922ec352016-02-15 17:54:26 +0800734 filemap_write_and_wait_range(inode->i_mapping, 0,
735 disk_link.len - 1);
Jaegeuk Kimd0cae972015-04-15 13:37:53 -0700736
Chao Yua6be0142015-10-22 18:23:08 +0800737 if (IS_DIRSYNC(dir))
738 f2fs_sync_fs(sbi->sb, 1);
739 } else {
740 f2fs_unlink(dir, dentry);
741 }
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -0700742
Jaegeuk Kim9bb02c32017-04-11 19:01:26 -0700743 f2fs_balance_fs(sbi, true);
Eric Biggers393c0382018-01-11 23:26:49 -0500744 goto out_free_encrypted_link;
745
Chao Yu4d57b862018-05-30 00:20:41 +0800746out_f2fs_handle_failed_inode:
747 f2fs_handle_failed_inode(inode);
Eric Biggers393c0382018-01-11 23:26:49 -0500748out_free_encrypted_link:
749 if (disk_link.name != (unsigned char *)symname)
Chao Yuc8eb7022020-09-14 16:47:00 +0800750 kfree(disk_link.name);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900751 return err;
752}
753
Christian Braunerc54bd912023-01-13 12:49:15 +0100754static int f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
Christian Brauner549c7292021-01-21 14:19:43 +0100755 struct dentry *dentry, umode_t mode)
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900756{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700757 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900758 struct inode *inode;
Gu Zhenge4795562013-09-27 18:08:30 +0800759 int err;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900760
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200761 if (unlikely(f2fs_cp_error(sbi)))
762 return -EIO;
763
Chao Yu10a26872021-10-28 21:03:05 +0800764 err = f2fs_dquot_initialize(dir);
Chao Yu0abd6752017-07-09 00:13:07 +0800765 if (err)
766 return err;
767
Christian Braunerf2d40142023-01-13 12:49:25 +0100768 inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900769 if (IS_ERR(inode))
Namjae Jeon61412b62012-12-01 10:56:25 +0900770 return PTR_ERR(inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900771
772 inode->i_op = &f2fs_dir_inode_operations;
773 inode->i_fop = &f2fs_dir_operations;
774 inode->i_mapping->a_ops = &f2fs_dblock_aops;
Jaegeuk Kim92d602b2021-09-07 10:24:21 -0700775 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900776
Jaegeuk Kim91942322016-05-20 10:13:22 -0700777 set_inode_flag(inode, FI_INC_LINK);
Gu Zhenge4795562013-09-27 18:08:30 +0800778 f2fs_lock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900779 err = f2fs_add_link(dentry, inode);
780 if (err)
781 goto out_fail;
Jaegeuk Kim44c16152014-09-25 11:55:53 -0700782 f2fs_unlock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900783
Chao Yu4d57b862018-05-30 00:20:41 +0800784 f2fs_alloc_nid_done(sbi, inode->i_ino);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900785
Al Viro1e2e5472018-05-04 08:23:01 -0400786 d_instantiate_new(dentry, inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900787
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -0800788 if (IS_DIRSYNC(dir))
789 f2fs_sync_fs(sbi->sb, 1);
Jaegeuk Kim9bb02c32017-04-11 19:01:26 -0700790
791 f2fs_balance_fs(sbi, true);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900792 return 0;
793
794out_fail:
Jaegeuk Kim91942322016-05-20 10:13:22 -0700795 clear_inode_flag(inode, FI_INC_LINK);
Chao Yu4d57b862018-05-30 00:20:41 +0800796 f2fs_handle_failed_inode(inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900797 return err;
798}
799
800static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
801{
David Howells2b0143b2015-03-17 22:25:59 +0000802 struct inode *inode = d_inode(dentry);
Yi Zhuang5f029c02021-04-06 09:47:35 +0800803
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900804 if (f2fs_empty_dir(inode))
805 return f2fs_unlink(dir, dentry);
806 return -ENOTEMPTY;
807}
808
Christian Brauner5ebb29b2023-01-13 12:49:16 +0100809static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
Christian Brauner549c7292021-01-21 14:19:43 +0100810 struct dentry *dentry, umode_t mode, dev_t rdev)
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900811{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700812 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900813 struct inode *inode;
814 int err = 0;
815
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200816 if (unlikely(f2fs_cp_error(sbi)))
817 return -EIO;
Chao Yu00e09c02019-08-23 17:58:36 +0800818 if (!f2fs_is_checkpoint_ready(sbi))
819 return -ENOSPC;
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200820
Chao Yu10a26872021-10-28 21:03:05 +0800821 err = f2fs_dquot_initialize(dir);
Chao Yu0abd6752017-07-09 00:13:07 +0800822 if (err)
823 return err;
824
Christian Braunerf2d40142023-01-13 12:49:25 +0100825 inode = f2fs_new_inode(idmap, dir, mode, NULL);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900826 if (IS_ERR(inode))
827 return PTR_ERR(inode);
828
829 init_special_inode(inode, inode->i_mode, rdev);
830 inode->i_op = &f2fs_special_inode_operations;
831
Gu Zhenge4795562013-09-27 18:08:30 +0800832 f2fs_lock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900833 err = f2fs_add_link(dentry, inode);
834 if (err)
835 goto out;
Jaegeuk Kim44c16152014-09-25 11:55:53 -0700836 f2fs_unlock_op(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900837
Chao Yu4d57b862018-05-30 00:20:41 +0800838 f2fs_alloc_nid_done(sbi, inode->i_ino);
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -0800839
Al Viro1e2e5472018-05-04 08:23:01 -0400840 d_instantiate_new(dentry, inode);
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -0800841
842 if (IS_DIRSYNC(dir))
843 f2fs_sync_fs(sbi->sb, 1);
Jaegeuk Kim9bb02c32017-04-11 19:01:26 -0700844
845 f2fs_balance_fs(sbi, true);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900846 return 0;
847out:
Chao Yu4d57b862018-05-30 00:20:41 +0800848 f2fs_handle_failed_inode(inode);
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900849 return err;
850}
851
Christian Braunerf2d40142023-01-13 12:49:25 +0100852static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
Miklos Szeredi863f1442022-09-24 07:00:00 +0200853 struct file *file, umode_t mode, bool is_whiteout,
Chao Yu40b2d552024-02-07 15:05:48 +0800854 struct inode **new_inode, struct f2fs_filename *fname)
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800855{
856 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
857 struct inode *inode;
858 int err;
859
Chao Yu10a26872021-10-28 21:03:05 +0800860 err = f2fs_dquot_initialize(dir);
Chao Yu0abd6752017-07-09 00:13:07 +0800861 if (err)
862 return err;
863
Christian Braunerf2d40142023-01-13 12:49:25 +0100864 inode = f2fs_new_inode(idmap, dir, mode, NULL);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800865 if (IS_ERR(inode))
866 return PTR_ERR(inode);
867
Daeho Jeong3db1de02022-04-28 11:18:09 -0700868 if (is_whiteout) {
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800869 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
870 inode->i_op = &f2fs_special_inode_operations;
871 } else {
872 inode->i_op = &f2fs_file_inode_operations;
873 inode->i_fop = &f2fs_file_operations;
874 inode->i_mapping->a_ops = &f2fs_dblock_aops;
875 }
876
877 f2fs_lock_op(sbi);
Chao Yu4d57b862018-05-30 00:20:41 +0800878 err = f2fs_acquire_orphan_inode(sbi);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800879 if (err)
880 goto out;
881
Chao Yu40b2d552024-02-07 15:05:48 +0800882 err = f2fs_do_tmpfile(inode, dir, fname);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800883 if (err)
884 goto release_out;
885
886 /*
887 * add this non-linked tmpfile to orphan list, in this way we could
888 * remove all unused data of tmpfile after abnormal power-off.
889 */
Chao Yu4d57b862018-05-30 00:20:41 +0800890 f2fs_add_orphan_inode(inode);
891 f2fs_alloc_nid_done(sbi, inode->i_ino);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800892
Daeho Jeong3db1de02022-04-28 11:18:09 -0700893 if (is_whiteout) {
Jaegeuk Kima1961242016-05-20 09:43:20 -0700894 f2fs_i_links_write(inode, false);
Chao Yu46085f32021-01-12 09:55:09 +0800895
896 spin_lock(&inode->i_lock);
Jaegeuk Kim5b1dbb02019-12-06 16:59:58 -0800897 inode->i_state |= I_LINKABLE;
Chao Yu46085f32021-01-12 09:55:09 +0800898 spin_unlock(&inode->i_lock);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800899 } else {
Miklos Szeredi863f1442022-09-24 07:00:00 +0200900 if (file)
901 d_tmpfile(file, inode);
Daeho Jeong3db1de02022-04-28 11:18:09 -0700902 else
903 f2fs_i_links_write(inode, false);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800904 }
Jaegeuk Kima1961242016-05-20 09:43:20 -0700905 /* link_count was changed by d_tmpfile as well. */
906 f2fs_unlock_op(sbi);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800907 unlock_new_inode(inode);
Jaegeuk Kim9bb02c32017-04-11 19:01:26 -0700908
Daeho Jeong3db1de02022-04-28 11:18:09 -0700909 if (new_inode)
910 *new_inode = inode;
911
Jaegeuk Kim9bb02c32017-04-11 19:01:26 -0700912 f2fs_balance_fs(sbi, true);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800913 return 0;
914
915release_out:
Chao Yu4d57b862018-05-30 00:20:41 +0800916 f2fs_release_orphan_inode(sbi);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800917out:
Chao Yu4d57b862018-05-30 00:20:41 +0800918 f2fs_handle_failed_inode(inode);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800919 return err;
920}
921
Christian Brauner011e2b72023-01-13 12:49:18 +0100922static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
Miklos Szeredi863f1442022-09-24 07:00:00 +0200923 struct file *file, umode_t mode)
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800924{
Sheng Yongff62af22018-03-15 18:51:42 +0800925 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
Miklos Szeredi863f1442022-09-24 07:00:00 +0200926 int err;
Sheng Yongff62af22018-03-15 18:51:42 +0800927
928 if (unlikely(f2fs_cp_error(sbi)))
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200929 return -EIO;
Chao Yu00e09c02019-08-23 17:58:36 +0800930 if (!f2fs_is_checkpoint_ready(sbi))
931 return -ENOSPC;
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200932
Chao Yu40b2d552024-02-07 15:05:48 +0800933 err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
Miklos Szeredi863f1442022-09-24 07:00:00 +0200934
935 return finish_open_simple(file, err);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800936}
937
Christian Braunerf2d40142023-01-13 12:49:25 +0100938static int f2fs_create_whiteout(struct mnt_idmap *idmap,
Chao Yu40b2d552024-02-07 15:05:48 +0800939 struct inode *dir, struct inode **whiteout,
940 struct f2fs_filename *fname)
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800941{
Chao Yu40b2d552024-02-07 15:05:48 +0800942 return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
943 true, whiteout, fname);
Daeho Jeong3db1de02022-04-28 11:18:09 -0700944}
945
Christian Braunerf2d40142023-01-13 12:49:25 +0100946int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
Daeho Jeong3db1de02022-04-28 11:18:09 -0700947 struct inode **new_inode)
948{
Chao Yu40b2d552024-02-07 15:05:48 +0800949 return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
950 false, new_inode, NULL);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800951}
952
Christian Braunerf2d40142023-01-13 12:49:25 +0100953static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
Chao Yu984fc4e2022-02-04 13:24:56 +0800954 struct dentry *old_dentry, struct inode *new_dir,
955 struct dentry *new_dentry, unsigned int flags)
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900956{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700957 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
David Howells2b0143b2015-03-17 22:25:59 +0000958 struct inode *old_inode = d_inode(old_dentry);
959 struct inode *new_inode = d_inode(new_dentry);
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800960 struct inode *whiteout = NULL;
Jaegeuk Kim762e4db2019-12-11 15:10:47 -0800961 struct page *old_dir_page = NULL;
Chao Yu7e01e7ad2015-05-19 17:37:26 +0800962 struct page *old_page, *new_page = NULL;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900963 struct f2fs_dir_entry *old_dir_entry = NULL;
964 struct f2fs_dir_entry *old_entry;
965 struct f2fs_dir_entry *new_entry;
Jan Kara7deee772023-10-12 23:14:23 +0200966 bool old_is_dir = S_ISDIR(old_inode->i_mode);
Jaegeuk Kimd83d0f52018-09-17 13:25:04 -0700967 int err;
Jaegeuk Kim57397d82012-11-02 17:11:10 +0900968
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200969 if (unlikely(f2fs_cp_error(sbi)))
970 return -EIO;
Chao Yu00e09c02019-08-23 17:58:36 +0800971 if (!f2fs_is_checkpoint_ready(sbi))
972 return -ENOSPC;
Jaegeuk Kim1f227a32017-10-23 23:48:49 +0200973
Chao Yu5c571322017-07-26 00:01:41 +0800974 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
975 (!projid_eq(F2FS_I(new_dir)->i_projid,
976 F2FS_I(old_dentry->d_inode)->i_projid)))
977 return -EXDEV;
978
Jaegeuk Kimb06af2a2019-12-09 19:03:05 -0800979 /*
980 * If new_inode is null, the below renaming flow will
Jinyoung CHOI146949d2023-02-06 20:56:00 +0900981 * add a link in old_dir which can convert inline_dir.
Jaegeuk Kimb06af2a2019-12-09 19:03:05 -0800982 * After then, if we failed to get the entry due to other
983 * reasons like ENOMEM, we had to remove the new entry.
984 * Instead of adding such the error handling routine, let's
985 * simply convert first here.
986 */
987 if (old_dir == new_dir && !new_inode) {
988 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
989 if (err)
990 return err;
991 }
992
Jaegeuk Kim5b1dbb02019-12-06 16:59:58 -0800993 if (flags & RENAME_WHITEOUT) {
Chao Yu40b2d552024-02-07 15:05:48 +0800994 struct f2fs_filename fname;
995
996 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
997 0, &fname);
998 if (err)
999 return err;
1000
1001 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
Jaegeuk Kim5b1dbb02019-12-06 16:59:58 -08001002 if (err)
1003 return err;
1004 }
1005
Chao Yu10a26872021-10-28 21:03:05 +08001006 err = f2fs_dquot_initialize(old_dir);
Chao Yu0abd6752017-07-09 00:13:07 +08001007 if (err)
1008 goto out;
1009
Chao Yu10a26872021-10-28 21:03:05 +08001010 err = f2fs_dquot_initialize(new_dir);
Chao Yu0abd6752017-07-09 00:13:07 +08001011 if (err)
1012 goto out;
1013
Jaegeuk Kimd8d13892017-10-23 23:50:15 +02001014 if (new_inode) {
Chao Yu10a26872021-10-28 21:03:05 +08001015 err = f2fs_dquot_initialize(new_inode);
Jaegeuk Kimd8d13892017-10-23 23:50:15 +02001016 if (err)
1017 goto out;
1018 }
1019
Jaegeuk Kimd83d0f52018-09-17 13:25:04 -07001020 err = -ENOENT;
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001021 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
Chao Yu91246c22016-07-19 08:27:47 +08001022 if (!old_entry) {
1023 if (IS_ERR(old_page))
1024 err = PTR_ERR(old_page);
Jan Karacde3c9d2023-06-01 12:58:23 +02001025 goto out;
Chao Yu91246c22016-07-19 08:27:47 +08001026 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001027
Jan Kara7deee772023-10-12 23:14:23 +02001028 if (old_is_dir && old_dir != new_dir) {
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001029 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
Jaegeuk Kim3e198862016-06-09 14:57:19 -07001030 if (!old_dir_entry) {
Chao Yu91246c22016-07-19 08:27:47 +08001031 if (IS_ERR(old_dir_page))
1032 err = PTR_ERR(old_dir_page);
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001033 goto out_old;
Jaegeuk Kim3e198862016-06-09 14:57:19 -07001034 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001035 }
1036
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001037 if (new_inode) {
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001038
1039 err = -ENOTEMPTY;
Jan Kara7deee772023-10-12 23:14:23 +02001040 if (old_is_dir && !f2fs_empty_dir(new_inode))
Jaegeuk Kim5b1dbb02019-12-06 16:59:58 -08001041 goto out_dir;
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001042
1043 err = -ENOENT;
1044 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1045 &new_page);
Chao Yu91246c22016-07-19 08:27:47 +08001046 if (!new_entry) {
1047 if (IS_ERR(new_page))
1048 err = PTR_ERR(new_page);
Jaegeuk Kim5b1dbb02019-12-06 16:59:58 -08001049 goto out_dir;
Chao Yu91246c22016-07-19 08:27:47 +08001050 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001051
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -08001052 f2fs_balance_fs(sbi, true);
Jaegeuk Kim00623e62015-12-22 11:56:08 -08001053
Chao Yu12560102014-06-24 14:16:24 +08001054 f2fs_lock_op(sbi);
1055
Chao Yu4d57b862018-05-30 00:20:41 +08001056 err = f2fs_acquire_orphan_inode(sbi);
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +09001057 if (err)
1058 goto put_out_dir;
1059
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001060 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
Jaegeuk Kim762e4db2019-12-11 15:10:47 -08001061 new_page = NULL;
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001062
Jeff Laytonc62ebd32023-07-05 15:01:08 -04001063 inode_set_ctime_current(new_inode);
Tim Murraye4544b62022-01-07 12:48:44 -08001064 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
Jan Kara7deee772023-10-12 23:14:23 +02001065 if (old_is_dir)
Jaegeuk Kima1961242016-05-20 09:43:20 -07001066 f2fs_i_links_write(new_inode, false);
1067 f2fs_i_links_write(new_inode, false);
Tim Murraye4544b62022-01-07 12:48:44 -08001068 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +09001069
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001070 if (!new_inode->i_nlink)
Chao Yu4d57b862018-05-30 00:20:41 +08001071 f2fs_add_orphan_inode(new_inode);
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +09001072 else
Chao Yu4d57b862018-05-30 00:20:41 +08001073 f2fs_release_orphan_inode(sbi);
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001074 } else {
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -08001075 f2fs_balance_fs(sbi, true);
Jaegeuk Kim00623e62015-12-22 11:56:08 -08001076
Chao Yu12560102014-06-24 14:16:24 +08001077 f2fs_lock_op(sbi);
1078
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001079 err = f2fs_add_link(new_dentry, old_inode);
Chao Yu12560102014-06-24 14:16:24 +08001080 if (err) {
1081 f2fs_unlock_op(sbi);
Jaegeuk Kim5b1dbb02019-12-06 16:59:58 -08001082 goto out_dir;
Chao Yu12560102014-06-24 14:16:24 +08001083 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001084
Jan Kara7deee772023-10-12 23:14:23 +02001085 if (old_is_dir)
Jaegeuk Kima1961242016-05-20 09:43:20 -07001086 f2fs_i_links_write(new_dir, true);
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001087 }
1088
Tim Murraye4544b62022-01-07 12:48:44 -08001089 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
Jan Kara7deee772023-10-12 23:14:23 +02001090 if (!old_is_dir || whiteout)
Sheng Yongb855bf02017-06-26 10:41:36 +08001091 file_lost_pino(old_inode);
1092 else
Chao Yu2a606372019-11-07 14:12:05 +08001093 /* adjust dir's i_pino to pass fsck check */
1094 f2fs_i_pino_write(old_inode, new_dir->i_ino);
Tim Murraye4544b62022-01-07 12:48:44 -08001095 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
Jaegeuk Kimb2c08292014-06-30 18:09:55 +09001096
Jeff Laytonc62ebd32023-07-05 15:01:08 -04001097 inode_set_ctime_current(old_inode);
Jaegeuk Kim7c457292016-10-14 11:51:23 -07001098 f2fs_mark_inode_dirty_sync(old_inode, false);
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001099
Chao Yudbeacf02014-09-24 18:17:04 +08001100 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
Jaegeuk Kim762e4db2019-12-11 15:10:47 -08001101 old_page = NULL;
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001102
Chao Yu7e01e7ad2015-05-19 17:37:26 +08001103 if (whiteout) {
Jaegeuk Kim91942322016-05-20 10:13:22 -07001104 set_inode_flag(whiteout, FI_INC_LINK);
Chao Yu7e01e7ad2015-05-19 17:37:26 +08001105 err = f2fs_add_link(old_dentry, whiteout);
1106 if (err)
1107 goto put_out_dir;
Chao Yu46085f32021-01-12 09:55:09 +08001108
1109 spin_lock(&whiteout->i_lock);
Chao Yu7e01e7ad2015-05-19 17:37:26 +08001110 whiteout->i_state &= ~I_LINKABLE;
Chao Yu46085f32021-01-12 09:55:09 +08001111 spin_unlock(&whiteout->i_lock);
1112
Chao Yu7e01e7ad2015-05-19 17:37:26 +08001113 iput(whiteout);
1114 }
1115
Jaegeuk Kimc10e85582024-01-12 09:11:13 -08001116 if (old_dir_entry)
1117 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1118 if (old_is_dir)
Jaegeuk Kima1961242016-05-20 09:43:20 -07001119 f2fs_i_links_write(old_dir, false);
Jaegeuk Kimc10e85582024-01-12 09:11:13 -08001120
Jaegeuk Kimade990f2018-04-24 22:43:01 -06001121 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
Chao Yu4d57b862018-05-30 00:20:41 +08001122 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
Jaegeuk Kimade990f2018-04-24 22:43:01 -06001123 if (S_ISDIR(old_inode->i_mode))
Chao Yu4d57b862018-05-30 00:20:41 +08001124 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1125 TRANS_DIR_INO);
Jaegeuk Kimade990f2018-04-24 22:43:01 -06001126 }
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001127
Gu Zhenge4795562013-09-27 18:08:30 +08001128 f2fs_unlock_op(sbi);
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -08001129
1130 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1131 f2fs_sync_fs(sbi->sb, 1);
Sahitya Tummala63903982018-10-05 10:47:40 +05301132
1133 f2fs_update_time(sbi, REQ_TIME);
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001134 return 0;
1135
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +09001136put_out_dir:
Chao Yu12560102014-06-24 14:16:24 +08001137 f2fs_unlock_op(sbi);
Jaegeuk Kim762e4db2019-12-11 15:10:47 -08001138 f2fs_put_page(new_page, 0);
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001139out_dir:
Yunlong Songbdbc90f2018-02-28 20:31:52 +08001140 if (old_dir_entry)
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001141 f2fs_put_page(old_dir_page, 0);
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001142out_old:
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001143 f2fs_put_page(old_page, 0);
1144out:
Wang Xiaojun646f64b2022-03-14 15:15:15 +08001145 iput(whiteout);
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001146 return err;
1147}
1148
Chao Yu32f9bc22014-07-12 19:13:54 +08001149static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1150 struct inode *new_dir, struct dentry *new_dentry)
1151{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001152 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
David Howells2b0143b2015-03-17 22:25:59 +00001153 struct inode *old_inode = d_inode(old_dentry);
1154 struct inode *new_inode = d_inode(new_dentry);
Chao Yu32f9bc22014-07-12 19:13:54 +08001155 struct page *old_dir_page, *new_dir_page;
1156 struct page *old_page, *new_page;
1157 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1158 struct f2fs_dir_entry *old_entry, *new_entry;
1159 int old_nlink = 0, new_nlink = 0;
Jaegeuk Kimd83d0f52018-09-17 13:25:04 -07001160 int err;
Chao Yu32f9bc22014-07-12 19:13:54 +08001161
Jaegeuk Kim1f227a32017-10-23 23:48:49 +02001162 if (unlikely(f2fs_cp_error(sbi)))
1163 return -EIO;
Chao Yu00e09c02019-08-23 17:58:36 +08001164 if (!f2fs_is_checkpoint_ready(sbi))
1165 return -ENOSPC;
Jaegeuk Kim1f227a32017-10-23 23:48:49 +02001166
Chao Yu5c571322017-07-26 00:01:41 +08001167 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1168 !projid_eq(F2FS_I(new_dir)->i_projid,
1169 F2FS_I(old_dentry->d_inode)->i_projid)) ||
1170 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1171 !projid_eq(F2FS_I(old_dir)->i_projid,
1172 F2FS_I(new_dentry->d_inode)->i_projid)))
1173 return -EXDEV;
1174
Chao Yu10a26872021-10-28 21:03:05 +08001175 err = f2fs_dquot_initialize(old_dir);
Chao Yu0abd6752017-07-09 00:13:07 +08001176 if (err)
1177 goto out;
1178
Chao Yu10a26872021-10-28 21:03:05 +08001179 err = f2fs_dquot_initialize(new_dir);
Chao Yu0abd6752017-07-09 00:13:07 +08001180 if (err)
1181 goto out;
1182
Jaegeuk Kimd83d0f52018-09-17 13:25:04 -07001183 err = -ENOENT;
Chao Yu32f9bc22014-07-12 19:13:54 +08001184 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
Chao Yu91246c22016-07-19 08:27:47 +08001185 if (!old_entry) {
1186 if (IS_ERR(old_page))
1187 err = PTR_ERR(old_page);
Chao Yu32f9bc22014-07-12 19:13:54 +08001188 goto out;
Chao Yu91246c22016-07-19 08:27:47 +08001189 }
Chao Yu32f9bc22014-07-12 19:13:54 +08001190
1191 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
Chao Yu91246c22016-07-19 08:27:47 +08001192 if (!new_entry) {
1193 if (IS_ERR(new_page))
1194 err = PTR_ERR(new_page);
Chao Yu32f9bc22014-07-12 19:13:54 +08001195 goto out_old;
Chao Yu91246c22016-07-19 08:27:47 +08001196 }
Chao Yu32f9bc22014-07-12 19:13:54 +08001197
1198 /* prepare for updating ".." directory entry info later */
1199 if (old_dir != new_dir) {
1200 if (S_ISDIR(old_inode->i_mode)) {
Chao Yu32f9bc22014-07-12 19:13:54 +08001201 old_dir_entry = f2fs_parent_dir(old_inode,
1202 &old_dir_page);
Jaegeuk Kim3e198862016-06-09 14:57:19 -07001203 if (!old_dir_entry) {
Chao Yu91246c22016-07-19 08:27:47 +08001204 if (IS_ERR(old_dir_page))
1205 err = PTR_ERR(old_dir_page);
Chao Yu32f9bc22014-07-12 19:13:54 +08001206 goto out_new;
Jaegeuk Kim3e198862016-06-09 14:57:19 -07001207 }
Chao Yu32f9bc22014-07-12 19:13:54 +08001208 }
1209
1210 if (S_ISDIR(new_inode->i_mode)) {
Chao Yu32f9bc22014-07-12 19:13:54 +08001211 new_dir_entry = f2fs_parent_dir(new_inode,
1212 &new_dir_page);
Jaegeuk Kim3e198862016-06-09 14:57:19 -07001213 if (!new_dir_entry) {
Chao Yu91246c22016-07-19 08:27:47 +08001214 if (IS_ERR(new_dir_page))
1215 err = PTR_ERR(new_dir_page);
Chao Yu32f9bc22014-07-12 19:13:54 +08001216 goto out_old_dir;
Jaegeuk Kim3e198862016-06-09 14:57:19 -07001217 }
Chao Yu32f9bc22014-07-12 19:13:54 +08001218 }
1219 }
1220
1221 /*
1222 * If cross rename between file and directory those are not
1223 * in the same directory, we will inc nlink of file's parent
1224 * later, so we should check upper boundary of its nlink.
1225 */
1226 if ((!old_dir_entry || !new_dir_entry) &&
1227 old_dir_entry != new_dir_entry) {
1228 old_nlink = old_dir_entry ? -1 : 1;
1229 new_nlink = -old_nlink;
1230 err = -EMLINK;
Kinglong Meee2f0e962017-03-04 21:48:28 +08001231 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1232 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
Chao Yu32f9bc22014-07-12 19:13:54 +08001233 goto out_new_dir;
1234 }
1235
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -08001236 f2fs_balance_fs(sbi, true);
Jaegeuk Kim00623e62015-12-22 11:56:08 -08001237
Chao Yu32f9bc22014-07-12 19:13:54 +08001238 f2fs_lock_op(sbi);
1239
Chao Yu32f9bc22014-07-12 19:13:54 +08001240 /* update ".." directory entry info of old dentry */
1241 if (old_dir_entry)
1242 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1243
1244 /* update ".." directory entry info of new dentry */
1245 if (new_dir_entry)
1246 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1247
1248 /* update directory entry info of old dir inode */
1249 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1250
Tim Murraye4544b62022-01-07 12:48:44 -08001251 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
Chao Yu2a606372019-11-07 14:12:05 +08001252 if (!old_dir_entry)
1253 file_lost_pino(old_inode);
1254 else
1255 /* adjust dir's i_pino to pass fsck check */
1256 f2fs_i_pino_write(old_inode, new_dir->i_ino);
Tim Murraye4544b62022-01-07 12:48:44 -08001257 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
Chao Yu32f9bc22014-07-12 19:13:54 +08001258
Jeff Laytonc62ebd32023-07-05 15:01:08 -04001259 inode_set_ctime_current(old_dir);
Chao Yu32f9bc22014-07-12 19:13:54 +08001260 if (old_nlink) {
Tim Murraye4544b62022-01-07 12:48:44 -08001261 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
Jaegeuk Kima1961242016-05-20 09:43:20 -07001262 f2fs_i_links_write(old_dir, old_nlink > 0);
Tim Murraye4544b62022-01-07 12:48:44 -08001263 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
Chao Yu32f9bc22014-07-12 19:13:54 +08001264 }
Jaegeuk Kim7c457292016-10-14 11:51:23 -07001265 f2fs_mark_inode_dirty_sync(old_dir, false);
Chao Yu32f9bc22014-07-12 19:13:54 +08001266
1267 /* update directory entry info of new dir inode */
1268 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1269
Tim Murraye4544b62022-01-07 12:48:44 -08001270 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
Chao Yu2a606372019-11-07 14:12:05 +08001271 if (!new_dir_entry)
1272 file_lost_pino(new_inode);
1273 else
1274 /* adjust dir's i_pino to pass fsck check */
1275 f2fs_i_pino_write(new_inode, old_dir->i_ino);
Tim Murraye4544b62022-01-07 12:48:44 -08001276 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
Chao Yu32f9bc22014-07-12 19:13:54 +08001277
Jeff Laytonc62ebd32023-07-05 15:01:08 -04001278 inode_set_ctime_current(new_dir);
Chao Yu32f9bc22014-07-12 19:13:54 +08001279 if (new_nlink) {
Tim Murraye4544b62022-01-07 12:48:44 -08001280 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
Jaegeuk Kima1961242016-05-20 09:43:20 -07001281 f2fs_i_links_write(new_dir, new_nlink > 0);
Tim Murraye4544b62022-01-07 12:48:44 -08001282 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
Chao Yu32f9bc22014-07-12 19:13:54 +08001283 }
Jaegeuk Kim7c457292016-10-14 11:51:23 -07001284 f2fs_mark_inode_dirty_sync(new_dir, false);
Chao Yu32f9bc22014-07-12 19:13:54 +08001285
Chao Yu63189b72018-03-08 14:22:56 +08001286 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
Chao Yu4d57b862018-05-30 00:20:41 +08001287 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1288 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
Junling Zheng93cf93f2018-03-07 12:07:49 +08001289 }
Jaegeuk Kim0a007b972017-12-28 08:09:44 -08001290
Chao Yu32f9bc22014-07-12 19:13:54 +08001291 f2fs_unlock_op(sbi);
Jaegeuk Kimb7e1d802014-11-09 22:15:31 -08001292
1293 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1294 f2fs_sync_fs(sbi->sb, 1);
Sahitya Tummala63903982018-10-05 10:47:40 +05301295
1296 f2fs_update_time(sbi, REQ_TIME);
Chao Yu32f9bc22014-07-12 19:13:54 +08001297 return 0;
Chao Yu32f9bc22014-07-12 19:13:54 +08001298out_new_dir:
1299 if (new_dir_entry) {
Chao Yu32f9bc22014-07-12 19:13:54 +08001300 f2fs_put_page(new_dir_page, 0);
1301 }
1302out_old_dir:
1303 if (old_dir_entry) {
Chao Yu32f9bc22014-07-12 19:13:54 +08001304 f2fs_put_page(old_dir_page, 0);
1305 }
1306out_new:
Chao Yu32f9bc22014-07-12 19:13:54 +08001307 f2fs_put_page(new_page, 0);
1308out_old:
Chao Yu32f9bc22014-07-12 19:13:54 +08001309 f2fs_put_page(old_page, 0);
1310out:
1311 return err;
1312}
1313
Christian Braunere18275a2023-01-13 12:49:17 +01001314static int f2fs_rename2(struct mnt_idmap *idmap,
Christian Brauner549c7292021-01-21 14:19:43 +01001315 struct inode *old_dir, struct dentry *old_dentry,
Chao Yu32f9bc22014-07-12 19:13:54 +08001316 struct inode *new_dir, struct dentry *new_dentry,
1317 unsigned int flags)
1318{
Eric Biggers2e45b072017-11-29 12:35:30 -08001319 int err;
1320
Chao Yu7e01e7ad2015-05-19 17:37:26 +08001321 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
Chao Yu32f9bc22014-07-12 19:13:54 +08001322 return -EINVAL;
1323
Chao Yu5f23ffd2023-11-28 17:31:29 +08001324 trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1325 flags);
1326
Eric Biggers2e45b072017-11-29 12:35:30 -08001327 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1328 flags);
1329 if (err)
1330 return err;
1331
Chao Yu5f23ffd2023-11-28 17:31:29 +08001332 if (flags & RENAME_EXCHANGE)
1333 err = f2fs_cross_rename(old_dir, old_dentry,
1334 new_dir, new_dentry);
1335 else
Chao Yu32f9bc22014-07-12 19:13:54 +08001336 /*
1337 * VFS has already handled the new dentry existence case,
1338 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1339 */
Chao Yu5f23ffd2023-11-28 17:31:29 +08001340 err = f2fs_rename(idmap, old_dir, old_dentry,
Chao Yu984fc4e2022-02-04 13:24:56 +08001341 new_dir, new_dentry, flags);
Chao Yu5f23ffd2023-11-28 17:31:29 +08001342
1343 trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1344 return err;
Chao Yu32f9bc22014-07-12 19:13:54 +08001345}
1346
Al Viro6b255392015-11-17 10:20:54 -05001347static const char *f2fs_encrypted_get_link(struct dentry *dentry,
Al Virofceef392015-12-29 15:58:39 -05001348 struct inode *inode,
1349 struct delayed_call *done)
Chao Yu50732df2014-06-19 16:23:19 +08001350{
Eric Biggersf2329cb2018-01-11 23:26:49 -05001351 struct page *page;
1352 const char *target;
Chao Yu50732df2014-06-19 16:23:19 +08001353
Al Viro6b255392015-11-17 10:20:54 -05001354 if (!dentry)
1355 return ERR_PTR(-ECHILD);
1356
Eric Biggersf2329cb2018-01-11 23:26:49 -05001357 page = read_mapping_page(inode->i_mapping, 0, NULL);
1358 if (IS_ERR(page))
1359 return ERR_CAST(page);
Chao Yu50732df2014-06-19 16:23:19 +08001360
Eric Biggersf2329cb2018-01-11 23:26:49 -05001361 target = fscrypt_get_symlink(inode, page_address(page),
1362 inode->i_sb->s_blocksize, done);
1363 put_page(page);
1364 return target;
Chao Yu50732df2014-06-19 16:23:19 +08001365}
1366
Christian Braunerb74d24f2023-01-13 12:49:12 +01001367static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
Eric Biggers461b43a2021-07-01 23:53:48 -07001368 const struct path *path,
1369 struct kstat *stat, u32 request_mask,
1370 unsigned int query_flags)
1371{
Christian Braunerb74d24f2023-01-13 12:49:12 +01001372 f2fs_getattr(idmap, path, stat, request_mask, query_flags);
Eric Biggers461b43a2021-07-01 23:53:48 -07001373
1374 return fscrypt_symlink_getattr(path, stat);
1375}
1376
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -07001377const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
Jack Qiua87aff12020-07-24 16:55:28 +08001378 .get_link = f2fs_encrypted_get_link,
Eric Biggers461b43a2021-07-01 23:53:48 -07001379 .getattr = f2fs_encrypted_symlink_getattr,
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -07001380 .setattr = f2fs_setattr,
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -07001381 .listxattr = f2fs_listxattr,
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -07001382};
Jaegeuk Kimcbaf0422015-04-29 15:10:53 -07001383
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001384const struct inode_operations f2fs_dir_inode_operations = {
1385 .create = f2fs_create,
1386 .lookup = f2fs_lookup,
1387 .link = f2fs_link,
1388 .unlink = f2fs_unlink,
1389 .symlink = f2fs_symlink,
1390 .mkdir = f2fs_mkdir,
1391 .rmdir = f2fs_rmdir,
1392 .mknod = f2fs_mknod,
Miklos Szeredi2773bf02016-09-27 11:03:58 +02001393 .rename = f2fs_rename2,
Chao Yu50732df2014-06-19 16:23:19 +08001394 .tmpfile = f2fs_tmpfile,
Jaegeuk Kim2d4d9fb52013-06-07 16:33:07 +09001395 .getattr = f2fs_getattr,
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001396 .setattr = f2fs_setattr,
Christian Braunercac2f8b2022-09-22 17:17:00 +02001397 .get_inode_acl = f2fs_get_acl,
Christoph Hellwiga6dda0e2013-12-20 05:16:45 -08001398 .set_acl = f2fs_set_acl,
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001399 .listxattr = f2fs_listxattr,
Chao Yu7975f342019-07-22 18:03:50 +08001400 .fiemap = f2fs_fiemap,
Miklos Szeredi9b1bb012021-04-07 14:36:43 +02001401 .fileattr_get = f2fs_fileattr_get,
1402 .fileattr_set = f2fs_fileattr_set,
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001403};
1404
1405const struct inode_operations f2fs_symlink_inode_operations = {
Jack Qiua87aff12020-07-24 16:55:28 +08001406 .get_link = f2fs_get_link,
Jaegeuk Kim2d4d9fb52013-06-07 16:33:07 +09001407 .getattr = f2fs_getattr,
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001408 .setattr = f2fs_setattr,
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001409 .listxattr = f2fs_listxattr,
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001410};
1411
1412const struct inode_operations f2fs_special_inode_operations = {
Jaegeuk Kim2d4d9fb52013-06-07 16:33:07 +09001413 .getattr = f2fs_getattr,
Jack Qiua87aff12020-07-24 16:55:28 +08001414 .setattr = f2fs_setattr,
Christian Braunercac2f8b2022-09-22 17:17:00 +02001415 .get_inode_acl = f2fs_get_acl,
Christoph Hellwiga6dda0e2013-12-20 05:16:45 -08001416 .set_acl = f2fs_set_acl,
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001417 .listxattr = f2fs_listxattr,
Jaegeuk Kim57397d82012-11-02 17:11:10 +09001418};