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Commit | Line | Data |
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1f327613 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2bad8471 EVH |
2 | /* |
3 | * linux/fs/9p/vfs_inode.c | |
4 | * | |
73c592b9 | 5 | * This file contains vfs inode ops for the 9P2000 protocol. |
2bad8471 EVH |
6 | * |
7 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
8 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
2bad8471 EVH |
9 | */ |
10 | ||
5d385153 JP |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | ||
2bad8471 EVH |
13 | #include <linux/module.h> |
14 | #include <linux/errno.h> | |
15 | #include <linux/fs.h> | |
16 | #include <linux/file.h> | |
17 | #include <linux/pagemap.h> | |
18 | #include <linux/stat.h> | |
19 | #include <linux/string.h> | |
2bad8471 EVH |
20 | #include <linux/inet.h> |
21 | #include <linux/namei.h> | |
22 | #include <linux/idr.h> | |
e8edc6e0 | 23 | #include <linux/sched.h> |
5a0e3ad6 | 24 | #include <linux/slab.h> |
ebf46264 | 25 | #include <linux/xattr.h> |
85ff872d | 26 | #include <linux/posix_acl.h> |
bd238fb4 LI |
27 | #include <net/9p/9p.h> |
28 | #include <net/9p/client.h> | |
2bad8471 | 29 | |
2bad8471 | 30 | #include "v9fs.h" |
2bad8471 | 31 | #include "v9fs_vfs.h" |
2bad8471 | 32 | #include "fid.h" |
60e78d2c | 33 | #include "cache.h" |
ebf46264 | 34 | #include "xattr.h" |
85ff872d | 35 | #include "acl.h" |
2bad8471 | 36 | |
754661f1 | 37 | static const struct inode_operations v9fs_dir_inode_operations; |
9b6533c9 | 38 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
754661f1 AV |
39 | static const struct inode_operations v9fs_file_inode_operations; |
40 | static const struct inode_operations v9fs_symlink_inode_operations; | |
f5fc6145 | 41 | |
2bad8471 EVH |
42 | /** |
43 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
44 | * @v9ses: v9fs session information | |
45 | * @mode: mode to convert | |
46 | * | |
47 | */ | |
48 | ||
3eda0de6 | 49 | static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) |
2bad8471 EVH |
50 | { |
51 | int res; | |
52 | res = mode & 0777; | |
53 | if (S_ISDIR(mode)) | |
bd238fb4 | 54 | res |= P9_DMDIR; |
dd6102fb | 55 | if (v9fs_proto_dotu(v9ses)) { |
2bad8471 EVH |
56 | if (v9ses->nodev == 0) { |
57 | if (S_ISSOCK(mode)) | |
bd238fb4 | 58 | res |= P9_DMSOCKET; |
2bad8471 | 59 | if (S_ISFIFO(mode)) |
bd238fb4 | 60 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 61 | if (S_ISBLK(mode)) |
bd238fb4 | 62 | res |= P9_DMDEVICE; |
2bad8471 | 63 | if (S_ISCHR(mode)) |
bd238fb4 | 64 | res |= P9_DMDEVICE; |
2bad8471 EVH |
65 | } |
66 | ||
67 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 68 | res |= P9_DMSETUID; |
2bad8471 | 69 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 70 | res |= P9_DMSETGID; |
d199d652 AL |
71 | if ((mode & S_ISVTX) == S_ISVTX) |
72 | res |= P9_DMSETVTX; | |
2bad8471 | 73 | } |
2bad8471 EVH |
74 | return res; |
75 | } | |
76 | ||
df345c67 AK |
77 | /** |
78 | * p9mode2perm- convert plan9 mode bits to unix permission bits | |
79 | * @v9ses: v9fs session information | |
80 | * @stat: p9_wstat from which mode need to be derived | |
81 | * | |
82 | */ | |
83 | static int p9mode2perm(struct v9fs_session_info *v9ses, | |
84 | struct p9_wstat *stat) | |
85 | { | |
86 | int res; | |
87 | int mode = stat->mode; | |
88 | ||
89 | res = mode & S_IALLUGO; | |
90 | if (v9fs_proto_dotu(v9ses)) { | |
91 | if ((mode & P9_DMSETUID) == P9_DMSETUID) | |
92 | res |= S_ISUID; | |
93 | ||
94 | if ((mode & P9_DMSETGID) == P9_DMSETGID) | |
95 | res |= S_ISGID; | |
96 | ||
97 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
98 | res |= S_ISVTX; | |
99 | } | |
100 | return res; | |
101 | } | |
102 | ||
2bad8471 EVH |
103 | /** |
104 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
105 | * @v9ses: v9fs session information | |
45089142 AK |
106 | * @stat: p9_wstat from which mode need to be derived |
107 | * @rdev: major number, minor number in case of device files. | |
2bad8471 EVH |
108 | * |
109 | */ | |
3eda0de6 AV |
110 | static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, |
111 | struct p9_wstat *stat, dev_t *rdev) | |
2bad8471 EVH |
112 | { |
113 | int res; | |
3eda0de6 | 114 | u32 mode = stat->mode; |
2bad8471 | 115 | |
45089142 | 116 | *rdev = 0; |
df345c67 | 117 | res = p9mode2perm(v9ses, stat); |
2bad8471 | 118 | |
bd238fb4 | 119 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 120 | res |= S_IFDIR; |
dd6102fb | 121 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
2bad8471 | 122 | res |= S_IFLNK; |
dd6102fb | 123 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
124 | && (v9ses->nodev == 0)) |
125 | res |= S_IFSOCK; | |
dd6102fb | 126 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
127 | && (v9ses->nodev == 0)) |
128 | res |= S_IFIFO; | |
dd6102fb | 129 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
45089142 AK |
130 | && (v9ses->nodev == 0)) { |
131 | char type = 0, ext[32]; | |
132 | int major = -1, minor = -1; | |
133 | ||
b3f8ab4b | 134 | strlcpy(ext, stat->extension, sizeof(ext)); |
afe604d0 | 135 | sscanf(ext, "%c %i %i", &type, &major, &minor); |
45089142 AK |
136 | switch (type) { |
137 | case 'c': | |
138 | res |= S_IFCHR; | |
139 | break; | |
140 | case 'b': | |
141 | res |= S_IFBLK; | |
142 | break; | |
143 | default: | |
5d385153 JP |
144 | p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", |
145 | type, stat->extension); | |
51958817 | 146 | } |
45089142 AK |
147 | *rdev = MKDEV(major, minor); |
148 | } else | |
2bad8471 EVH |
149 | res |= S_IFREG; |
150 | ||
2bad8471 EVH |
151 | return res; |
152 | } | |
153 | ||
ee443996 EVH |
154 | /** |
155 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
156 | * @uflags: flags to convert | |
2e4bef41 | 157 | * @extended: if .u extensions are active |
ee443996 EVH |
158 | */ |
159 | ||
2e4bef41 | 160 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
161 | { |
162 | int ret; | |
163 | ||
164 | ret = 0; | |
165 | switch (uflags&3) { | |
166 | default: | |
167 | case O_RDONLY: | |
bd238fb4 | 168 | ret = P9_OREAD; |
6a3124a3 LI |
169 | break; |
170 | ||
171 | case O_WRONLY: | |
bd238fb4 | 172 | ret = P9_OWRITE; |
6a3124a3 LI |
173 | break; |
174 | ||
175 | case O_RDWR: | |
bd238fb4 | 176 | ret = P9_ORDWR; |
6a3124a3 LI |
177 | break; |
178 | } | |
179 | ||
2e4bef41 EVH |
180 | if (extended) { |
181 | if (uflags & O_EXCL) | |
182 | ret |= P9_OEXCL; | |
183 | ||
184 | if (uflags & O_APPEND) | |
185 | ret |= P9_OAPPEND; | |
186 | } | |
6a3124a3 LI |
187 | |
188 | return ret; | |
189 | } | |
190 | ||
2bad8471 | 191 | /** |
531b1094 | 192 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
531b1094 | 193 | * @wstat: structure to initialize |
2bad8471 EVH |
194 | * |
195 | */ | |
196 | ||
7a4439c4 | 197 | void |
bd238fb4 | 198 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 199 | { |
531b1094 LI |
200 | wstat->type = ~0; |
201 | wstat->dev = ~0; | |
202 | wstat->qid.type = ~0; | |
203 | wstat->qid.version = ~0; | |
204 | *((long long *)&wstat->qid.path) = ~0; | |
205 | wstat->mode = ~0; | |
206 | wstat->atime = ~0; | |
207 | wstat->mtime = ~0; | |
208 | wstat->length = ~0; | |
209 | wstat->name = NULL; | |
210 | wstat->uid = NULL; | |
211 | wstat->gid = NULL; | |
212 | wstat->muid = NULL; | |
447c5094 EB |
213 | wstat->n_uid = INVALID_UID; |
214 | wstat->n_gid = INVALID_GID; | |
215 | wstat->n_muid = INVALID_UID; | |
531b1094 | 216 | wstat->extension = NULL; |
2bad8471 EVH |
217 | } |
218 | ||
60e78d2c AK |
219 | /** |
220 | * v9fs_alloc_inode - helper function to allocate an inode | |
60e78d2c AK |
221 | * |
222 | */ | |
60e78d2c AK |
223 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
224 | { | |
a78ce05d | 225 | struct v9fs_inode *v9inode; |
2ed0b757 | 226 | v9inode = kmem_cache_alloc(v9fs_inode_cache, GFP_KERNEL); |
a78ce05d | 227 | if (!v9inode) |
60e78d2c | 228 | return NULL; |
a78ce05d AK |
229 | #ifdef CONFIG_9P_FSCACHE |
230 | v9inode->fscache = NULL; | |
8f5fed1e | 231 | mutex_init(&v9inode->fscache_lock); |
a78ce05d | 232 | #endif |
6b39f6d2 | 233 | v9inode->writeback_fid = NULL; |
b3cbea03 | 234 | v9inode->cache_validity = 0; |
5a7e0a8c | 235 | mutex_init(&v9inode->v_mutex); |
a78ce05d | 236 | return &v9inode->vfs_inode; |
60e78d2c AK |
237 | } |
238 | ||
239 | /** | |
5e8a0770 | 240 | * v9fs_free_inode - destroy an inode |
60e78d2c AK |
241 | * |
242 | */ | |
243 | ||
5e8a0770 | 244 | void v9fs_free_inode(struct inode *inode) |
60e78d2c | 245 | { |
a78ce05d | 246 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
60e78d2c | 247 | } |
fa0d7e3d | 248 | |
5ffc0cb3 | 249 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
3eda0de6 | 250 | struct inode *inode, umode_t mode, dev_t rdev) |
2bad8471 | 251 | { |
5ffc0cb3 | 252 | int err = 0; |
2bb54115 | 253 | |
21cb47be | 254 | inode_init_owner(&init_user_ns,inode, NULL, mode); |
2bb54115 | 255 | inode->i_blocks = 0; |
45089142 | 256 | inode->i_rdev = rdev; |
078cd827 | 257 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
2bb54115 | 258 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
987a6485 | 259 | inode->i_private = NULL; |
2bb54115 AK |
260 | |
261 | switch (mode & S_IFMT) { | |
262 | case S_IFIFO: | |
263 | case S_IFBLK: | |
264 | case S_IFCHR: | |
265 | case S_IFSOCK: | |
4b43516a MK |
266 | if (v9fs_proto_dotl(v9ses)) { |
267 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
4b43516a MK |
268 | } else if (v9fs_proto_dotu(v9ses)) { |
269 | inode->i_op = &v9fs_file_inode_operations; | |
4b43516a | 270 | } else { |
5d385153 JP |
271 | p9_debug(P9_DEBUG_ERROR, |
272 | "special files without extended mode\n"); | |
2bb54115 AK |
273 | err = -EINVAL; |
274 | goto error; | |
2bad8471 | 275 | } |
2bb54115 AK |
276 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
277 | break; | |
278 | case S_IFREG: | |
9b6533c9 SK |
279 | if (v9fs_proto_dotl(v9ses)) { |
280 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
fb89b45c DM |
281 | if (v9ses->cache == CACHE_LOOSE || |
282 | v9ses->cache == CACHE_FSCACHE) | |
29236f4e AK |
283 | inode->i_fop = |
284 | &v9fs_cached_file_operations_dotl; | |
fb89b45c DM |
285 | else if (v9ses->cache == CACHE_MMAP) |
286 | inode->i_fop = &v9fs_mmap_file_operations_dotl; | |
29236f4e AK |
287 | else |
288 | inode->i_fop = &v9fs_file_operations_dotl; | |
9b6533c9 SK |
289 | } else { |
290 | inode->i_op = &v9fs_file_inode_operations; | |
fb89b45c DM |
291 | if (v9ses->cache == CACHE_LOOSE || |
292 | v9ses->cache == CACHE_FSCACHE) | |
293 | inode->i_fop = | |
294 | &v9fs_cached_file_operations; | |
295 | else if (v9ses->cache == CACHE_MMAP) | |
296 | inode->i_fop = &v9fs_mmap_file_operations; | |
29236f4e AK |
297 | else |
298 | inode->i_fop = &v9fs_file_operations; | |
9b6533c9 SK |
299 | } |
300 | ||
2bb54115 AK |
301 | break; |
302 | case S_IFLNK: | |
9b6533c9 | 303 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
5d385153 JP |
304 | p9_debug(P9_DEBUG_ERROR, |
305 | "extended modes used with legacy protocol\n"); | |
2bb54115 AK |
306 | err = -EINVAL; |
307 | goto error; | |
308 | } | |
9b6533c9 SK |
309 | |
310 | if (v9fs_proto_dotl(v9ses)) | |
311 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
312 | else | |
313 | inode->i_op = &v9fs_symlink_inode_operations; | |
314 | ||
2bb54115 AK |
315 | break; |
316 | case S_IFDIR: | |
317 | inc_nlink(inode); | |
9b6533c9 SK |
318 | if (v9fs_proto_dotl(v9ses)) |
319 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
320 | else if (v9fs_proto_dotu(v9ses)) | |
321 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
322 | else |
323 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
324 | |
325 | if (v9fs_proto_dotl(v9ses)) | |
326 | inode->i_fop = &v9fs_dir_operations_dotl; | |
327 | else | |
328 | inode->i_fop = &v9fs_dir_operations; | |
329 | ||
2bb54115 AK |
330 | break; |
331 | default: | |
609eac1c | 332 | p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", |
5d385153 | 333 | mode, mode & S_IFMT); |
2bb54115 AK |
334 | err = -EINVAL; |
335 | goto error; | |
2bad8471 | 336 | } |
5ffc0cb3 AK |
337 | error: |
338 | return err; | |
2bb54115 | 339 | |
5ffc0cb3 | 340 | } |
2bb54115 | 341 | |
5ffc0cb3 AK |
342 | /** |
343 | * v9fs_get_inode - helper function to setup an inode | |
344 | * @sb: superblock | |
345 | * @mode: mode to setup inode with | |
346 | * | |
347 | */ | |
348 | ||
3eda0de6 | 349 | struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) |
5ffc0cb3 AK |
350 | { |
351 | int err; | |
352 | struct inode *inode; | |
353 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
354 | ||
609eac1c | 355 | p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); |
5ffc0cb3 AK |
356 | |
357 | inode = new_inode(sb); | |
358 | if (!inode) { | |
5d385153 JP |
359 | pr_warn("%s (%d): Problem allocating inode\n", |
360 | __func__, task_pid_nr(current)); | |
5ffc0cb3 AK |
361 | return ERR_PTR(-ENOMEM); |
362 | } | |
45089142 | 363 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
5ffc0cb3 AK |
364 | if (err) { |
365 | iput(inode); | |
366 | return ERR_PTR(err); | |
367 | } | |
368 | return inode; | |
2bad8471 EVH |
369 | } |
370 | ||
60e78d2c AK |
371 | /** |
372 | * v9fs_clear_inode - release an inode | |
373 | * @inode: inode to release | |
374 | * | |
375 | */ | |
b57922d9 | 376 | void v9fs_evict_inode(struct inode *inode) |
60e78d2c | 377 | { |
6b39f6d2 AK |
378 | struct v9fs_inode *v9inode = V9FS_I(inode); |
379 | ||
4ad78628 | 380 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 381 | clear_inode(inode); |
4ad78628 | 382 | filemap_fdatawrite(&inode->i_data); |
60e78d2c | 383 | |
60e78d2c | 384 | v9fs_cache_inode_put_cookie(inode); |
6b39f6d2 AK |
385 | /* clunk the fid stashed in writeback_fid */ |
386 | if (v9inode->writeback_fid) { | |
387 | p9_client_clunk(v9inode->writeback_fid); | |
388 | v9inode->writeback_fid = NULL; | |
3cf387d7 | 389 | } |
60e78d2c AK |
390 | } |
391 | ||
fd2421f5 AK |
392 | static int v9fs_test_inode(struct inode *inode, void *data) |
393 | { | |
394 | int umode; | |
45089142 | 395 | dev_t rdev; |
fd2421f5 AK |
396 | struct v9fs_inode *v9inode = V9FS_I(inode); |
397 | struct p9_wstat *st = (struct p9_wstat *)data; | |
398 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); | |
399 | ||
45089142 | 400 | umode = p9mode2unixmode(v9ses, st, &rdev); |
fd2421f5 AK |
401 | /* don't match inode of different type */ |
402 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) | |
403 | return 0; | |
404 | ||
405 | /* compare qid details */ | |
406 | if (memcmp(&v9inode->qid.version, | |
407 | &st->qid.version, sizeof(v9inode->qid.version))) | |
408 | return 0; | |
409 | ||
410 | if (v9inode->qid.type != st->qid.type) | |
411 | return 0; | |
8ee03163 TT |
412 | |
413 | if (v9inode->qid.path != st->qid.path) | |
414 | return 0; | |
fd2421f5 AK |
415 | return 1; |
416 | } | |
417 | ||
ed80fcfa AK |
418 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
419 | { | |
420 | return 0; | |
421 | } | |
422 | ||
fd2421f5 AK |
423 | static int v9fs_set_inode(struct inode *inode, void *data) |
424 | { | |
425 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
426 | struct p9_wstat *st = (struct p9_wstat *)data; | |
427 | ||
428 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
429 | return 0; | |
430 | } | |
431 | ||
5ffc0cb3 AK |
432 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
433 | struct p9_qid *qid, | |
ed80fcfa AK |
434 | struct p9_wstat *st, |
435 | int new) | |
6a3124a3 | 436 | { |
45089142 | 437 | dev_t rdev; |
3eda0de6 AV |
438 | int retval; |
439 | umode_t umode; | |
5ffc0cb3 AK |
440 | unsigned long i_ino; |
441 | struct inode *inode; | |
442 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
ed80fcfa AK |
443 | int (*test)(struct inode *, void *); |
444 | ||
445 | if (new) | |
446 | test = v9fs_test_new_inode; | |
447 | else | |
448 | test = v9fs_test_inode; | |
2bad8471 | 449 | |
5ffc0cb3 | 450 | i_ino = v9fs_qid2ino(qid); |
ed80fcfa | 451 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); |
5ffc0cb3 AK |
452 | if (!inode) |
453 | return ERR_PTR(-ENOMEM); | |
454 | if (!(inode->i_state & I_NEW)) | |
455 | return inode; | |
456 | /* | |
457 | * initialize the inode with the stat info | |
458 | * FIXME!! we may need support for stale inodes | |
459 | * later. | |
460 | */ | |
fd2421f5 | 461 | inode->i_ino = i_ino; |
45089142 AK |
462 | umode = p9mode2unixmode(v9ses, st, &rdev); |
463 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); | |
5ffc0cb3 | 464 | if (retval) |
6a3124a3 | 465 | goto error; |
60e78d2c | 466 | |
5e3cc1ee | 467 | v9fs_stat2inode(st, inode, sb, 0); |
5ffc0cb3 | 468 | v9fs_cache_inode_get_cookie(inode); |
5ffc0cb3 AK |
469 | unlock_new_inode(inode); |
470 | return inode; | |
6a3124a3 | 471 | error: |
0a73d0a2 | 472 | iget_failed(inode); |
5ffc0cb3 AK |
473 | return ERR_PTR(retval); |
474 | ||
475 | } | |
476 | ||
477 | struct inode * | |
a78ce05d | 478 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 479 | struct super_block *sb, int new) |
5ffc0cb3 AK |
480 | { |
481 | struct p9_wstat *st; | |
482 | struct inode *inode = NULL; | |
483 | ||
484 | st = p9_client_stat(fid); | |
485 | if (IS_ERR(st)) | |
486 | return ERR_CAST(st); | |
487 | ||
ed80fcfa | 488 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
02bc3567 | 489 | p9stat_free(st); |
bd238fb4 | 490 | kfree(st); |
5ffc0cb3 | 491 | return inode; |
2bad8471 EVH |
492 | } |
493 | ||
f88657ce AK |
494 | /** |
495 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to | |
496 | * plan 9 AT flag. | |
497 | * @flags: flags to convert | |
498 | */ | |
499 | static int v9fs_at_to_dotl_flags(int flags) | |
500 | { | |
501 | int rflags = 0; | |
502 | if (flags & AT_REMOVEDIR) | |
503 | rflags |= P9_DOTL_AT_REMOVEDIR; | |
504 | return rflags; | |
505 | } | |
506 | ||
ac89b2ef EG |
507 | /** |
508 | * v9fs_dec_count - helper functon to drop i_nlink. | |
509 | * | |
510 | * If a directory had nlink <= 2 (including . and ..), then we should not drop | |
511 | * the link count, which indicates the underlying exported fs doesn't maintain | |
512 | * nlink accurately. e.g. | |
513 | * - overlayfs sets nlink to 1 for merged dir | |
514 | * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more | |
515 | * than EXT4_LINK_MAX (65000) links. | |
516 | * | |
517 | * @inode: inode whose nlink is being dropped | |
518 | */ | |
519 | static void v9fs_dec_count(struct inode *inode) | |
520 | { | |
521 | if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) | |
522 | drop_nlink(inode); | |
523 | } | |
524 | ||
2bad8471 EVH |
525 | /** |
526 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 | 527 | * @dir: directory inode that is being deleted |
48e370ff | 528 | * @dentry: dentry that is being deleted |
fd2916bd | 529 | * @flags: removing a directory |
2bad8471 EVH |
530 | * |
531 | */ | |
532 | ||
48e370ff | 533 | static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) |
2bad8471 | 534 | { |
48e370ff AK |
535 | struct inode *inode; |
536 | int retval = -EOPNOTSUPP; | |
537 | struct p9_fid *v9fid, *dfid; | |
538 | struct v9fs_session_info *v9ses; | |
2bad8471 | 539 | |
5d385153 JP |
540 | p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", |
541 | dir, dentry, flags); | |
2bad8471 | 542 | |
48e370ff | 543 | v9ses = v9fs_inode2v9ses(dir); |
2b0143b5 | 544 | inode = d_inode(dentry); |
77d5a6b7 | 545 | dfid = v9fs_parent_fid(dentry); |
48e370ff AK |
546 | if (IS_ERR(dfid)) { |
547 | retval = PTR_ERR(dfid); | |
5d385153 | 548 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); |
48e370ff AK |
549 | return retval; |
550 | } | |
551 | if (v9fs_proto_dotl(v9ses)) | |
f88657ce AK |
552 | retval = p9_client_unlinkat(dfid, dentry->d_name.name, |
553 | v9fs_at_to_dotl_flags(flags)); | |
6636b6dc | 554 | p9_client_clunk(dfid); |
48e370ff AK |
555 | if (retval == -EOPNOTSUPP) { |
556 | /* Try the one based on path */ | |
557 | v9fid = v9fs_fid_clone(dentry); | |
558 | if (IS_ERR(v9fid)) | |
559 | return PTR_ERR(v9fid); | |
560 | retval = p9_client_remove(v9fid); | |
561 | } | |
b271ec47 AK |
562 | if (!retval) { |
563 | /* | |
564 | * directories on unlink should have zero | |
565 | * link count | |
566 | */ | |
48e370ff AK |
567 | if (flags & AT_REMOVEDIR) { |
568 | clear_nlink(inode); | |
ac89b2ef | 569 | v9fs_dec_count(dir); |
b271ec47 | 570 | } else |
ac89b2ef | 571 | v9fs_dec_count(inode); |
d28c61f0 | 572 | |
48e370ff | 573 | v9fs_invalidate_inode_attr(inode); |
d28c61f0 | 574 | v9fs_invalidate_inode_attr(dir); |
154372e6 EVH |
575 | |
576 | /* invalidate all fids associated with dentry */ | |
577 | /* NOTE: This will not include open fids */ | |
578 | dentry->d_op->d_release(dentry); | |
b271ec47 | 579 | } |
d994f405 | 580 | return retval; |
2bad8471 EVH |
581 | } |
582 | ||
583 | /** | |
bd238fb4 | 584 | * v9fs_create - Create a file |
ee443996 EVH |
585 | * @v9ses: session information |
586 | * @dir: directory that dentry is being created in | |
bd238fb4 | 587 | * @dentry: dentry that is being created |
0e15597e | 588 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
589 | * @perm: create permissions |
590 | * @mode: open mode | |
2bad8471 EVH |
591 | * |
592 | */ | |
bd238fb4 LI |
593 | static struct p9_fid * |
594 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
595 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 596 | { |
6a3124a3 | 597 | int err; |
7880b43b | 598 | const unsigned char *name; |
6636b6dc | 599 | struct p9_fid *dfid, *ofid = NULL, *fid = NULL; |
6a3124a3 | 600 | struct inode *inode; |
6a3124a3 | 601 | |
4b8e9923 | 602 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
51a87c55 | 603 | |
bd238fb4 | 604 | err = 0; |
7880b43b | 605 | name = dentry->d_name.name; |
77d5a6b7 | 606 | dfid = v9fs_parent_fid(dentry); |
ba17674f | 607 | if (IS_ERR(dfid)) { |
da977b2c | 608 | err = PTR_ERR(dfid); |
5d385153 | 609 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
6d27e64d | 610 | return ERR_PTR(err); |
da977b2c | 611 | } |
6a3124a3 | 612 | |
bd238fb4 | 613 | /* clone a fid to use for creation */ |
7d50a29f | 614 | ofid = clone_fid(dfid); |
bd238fb4 LI |
615 | if (IS_ERR(ofid)) { |
616 | err = PTR_ERR(ofid); | |
5d385153 | 617 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
6636b6dc | 618 | p9_client_clunk(dfid); |
6d27e64d | 619 | return ERR_PTR(err); |
bd238fb4 | 620 | } |
6a3124a3 | 621 | |
bd238fb4 | 622 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 | 623 | if (err < 0) { |
5d385153 | 624 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
6636b6dc | 625 | p9_client_clunk(dfid); |
6a3124a3 | 626 | goto error; |
6d27e64d | 627 | } |
6a3124a3 | 628 | |
b6054793 AK |
629 | if (!(perm & P9_DMLINK)) { |
630 | /* now walk from the parent so we can get unopened fid */ | |
631 | fid = p9_client_walk(dfid, 1, &name, 1); | |
632 | if (IS_ERR(fid)) { | |
633 | err = PTR_ERR(fid); | |
634 | p9_debug(P9_DEBUG_VFS, | |
635 | "p9_client_walk failed %d\n", err); | |
636 | fid = NULL; | |
6636b6dc | 637 | p9_client_clunk(dfid); |
b6054793 AK |
638 | goto error; |
639 | } | |
640 | /* | |
641 | * instantiate inode and assign the unopened fid to the dentry | |
642 | */ | |
643 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
644 | if (IS_ERR(inode)) { | |
645 | err = PTR_ERR(inode); | |
646 | p9_debug(P9_DEBUG_VFS, | |
647 | "inode creation failed %d\n", err); | |
6636b6dc | 648 | p9_client_clunk(dfid); |
b6054793 AK |
649 | goto error; |
650 | } | |
2ea03e1d | 651 | v9fs_fid_add(dentry, fid); |
b6054793 | 652 | d_instantiate(dentry, inode); |
6a3124a3 | 653 | } |
6636b6dc | 654 | p9_client_clunk(dfid); |
bd238fb4 | 655 | return ofid; |
bd238fb4 | 656 | error: |
bd238fb4 LI |
657 | if (ofid) |
658 | p9_client_clunk(ofid); | |
659 | ||
660 | if (fid) | |
661 | p9_client_clunk(fid); | |
662 | ||
663 | return ERR_PTR(err); | |
664 | } | |
665 | ||
666 | /** | |
e43ae79c MS |
667 | * v9fs_vfs_create - VFS hook to create a regular file |
668 | * | |
669 | * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called | |
670 | * for mknod(2). | |
671 | * | |
ee443996 | 672 | * @dir: directory inode that is being created |
bd238fb4 LI |
673 | * @dentry: dentry that is being deleted |
674 | * @mode: create permissions | |
bd238fb4 LI |
675 | * |
676 | */ | |
6a3124a3 | 677 | |
bd238fb4 | 678 | static int |
549c7297 CB |
679 | v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir, |
680 | struct dentry *dentry, umode_t mode, bool excl) | |
bd238fb4 | 681 | { |
e43ae79c MS |
682 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
683 | u32 perm = unixmode2p9mode(v9ses, mode); | |
684 | struct p9_fid *fid; | |
bd238fb4 | 685 | |
e43ae79c MS |
686 | /* P9_OEXCL? */ |
687 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); | |
688 | if (IS_ERR(fid)) | |
689 | return PTR_ERR(fid); | |
bd238fb4 | 690 | |
d28c61f0 | 691 | v9fs_invalidate_inode_attr(dir); |
e43ae79c | 692 | p9_client_clunk(fid); |
6a3124a3 LI |
693 | |
694 | return 0; | |
2bad8471 EVH |
695 | } |
696 | ||
697 | /** | |
698 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
ee443996 | 699 | * @dir: inode that is being unlinked |
2bad8471 EVH |
700 | * @dentry: dentry that is being unlinked |
701 | * @mode: mode for new directory | |
702 | * | |
703 | */ | |
704 | ||
549c7297 CB |
705 | static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, |
706 | struct dentry *dentry, umode_t mode) | |
2bad8471 | 707 | { |
6a3124a3 | 708 | int err; |
bd238fb4 | 709 | u32 perm; |
bd238fb4 | 710 | struct p9_fid *fid; |
d28c61f0 | 711 | struct v9fs_session_info *v9ses; |
6a3124a3 | 712 | |
4b8e9923 | 713 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
bd238fb4 | 714 | err = 0; |
6a3124a3 | 715 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 716 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
717 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
718 | if (IS_ERR(fid)) { | |
719 | err = PTR_ERR(fid); | |
720 | fid = NULL; | |
d28c61f0 | 721 | } else { |
b271ec47 | 722 | inc_nlink(dir); |
d28c61f0 AK |
723 | v9fs_invalidate_inode_attr(dir); |
724 | } | |
6a3124a3 | 725 | |
bd238fb4 LI |
726 | if (fid) |
727 | p9_client_clunk(fid); | |
6a3124a3 | 728 | |
6a3124a3 | 729 | return err; |
2bad8471 EVH |
730 | } |
731 | ||
732 | /** | |
733 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
734 | * @dir: inode that is being walked from | |
735 | * @dentry: dentry that is being walked to? | |
fd2916bd | 736 | * @flags: lookup flags (unused) |
2bad8471 EVH |
737 | * |
738 | */ | |
739 | ||
53c06f4e | 740 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 741 | unsigned int flags) |
2bad8471 | 742 | { |
73f50717 | 743 | struct dentry *res; |
2bad8471 | 744 | struct v9fs_session_info *v9ses; |
bd238fb4 | 745 | struct p9_fid *dfid, *fid; |
2bad8471 | 746 | struct inode *inode; |
7880b43b | 747 | const unsigned char *name; |
2bad8471 | 748 | |
4b8e9923 AV |
749 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", |
750 | dir, dentry, dentry, flags); | |
2bad8471 | 751 | |
11e9b49b SK |
752 | if (dentry->d_name.len > NAME_MAX) |
753 | return ERR_PTR(-ENAMETOOLONG); | |
754 | ||
2bad8471 | 755 | v9ses = v9fs_inode2v9ses(dir); |
a534c8d1 | 756 | /* We can walk d_parent because we hold the dir->i_mutex */ |
77d5a6b7 | 757 | dfid = v9fs_parent_fid(dentry); |
bd238fb4 | 758 | if (IS_ERR(dfid)) |
e231c2ee | 759 | return ERR_CAST(dfid); |
bd238fb4 | 760 | |
73f50717 AK |
761 | /* |
762 | * Make sure we don't use a wrong inode due to parallel | |
763 | * unlink. For cached mode create calls request for new | |
764 | * inode. But with cache disabled, lookup should do this. | |
765 | */ | |
500e2ab6 AV |
766 | name = dentry->d_name.name; |
767 | fid = p9_client_walk(dfid, 1, &name, 1); | |
6636b6dc | 768 | p9_client_clunk(dfid); |
500e2ab6 AV |
769 | if (fid == ERR_PTR(-ENOENT)) |
770 | inode = NULL; | |
771 | else if (IS_ERR(fid)) | |
772 | inode = ERR_CAST(fid); | |
773 | else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) | |
73f50717 AK |
774 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
775 | else | |
776 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
73f50717 AK |
777 | /* |
778 | * If we had a rename on the server and a parallel lookup | |
779 | * for the new name, then make sure we instantiate with | |
780 | * the new name. ie look up for a/b, while on server somebody | |
781 | * moved b under k and client parallely did a lookup for | |
782 | * k/b. | |
783 | */ | |
41d28bca | 784 | res = d_splice_alias(inode, dentry); |
500e2ab6 AV |
785 | if (!IS_ERR(fid)) { |
786 | if (!res) | |
787 | v9fs_fid_add(dentry, fid); | |
788 | else if (!IS_ERR(res)) | |
789 | v9fs_fid_add(res, fid); | |
790 | else | |
791 | p9_client_clunk(fid); | |
792 | } | |
7b5be621 | 793 | return res; |
2bad8471 EVH |
794 | } |
795 | ||
d9585277 | 796 | static int |
e43ae79c | 797 | v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, |
44907d79 | 798 | struct file *file, unsigned flags, umode_t mode) |
e43ae79c MS |
799 | { |
800 | int err; | |
801 | u32 perm; | |
e43ae79c MS |
802 | struct v9fs_inode *v9inode; |
803 | struct v9fs_session_info *v9ses; | |
804 | struct p9_fid *fid, *inode_fid; | |
805 | struct dentry *res = NULL; | |
987a6485 | 806 | struct inode *inode; |
e43ae79c | 807 | |
00699ad8 | 808 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 809 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 810 | if (IS_ERR(res)) |
d9585277 | 811 | return PTR_ERR(res); |
e43ae79c MS |
812 | |
813 | if (res) | |
814 | dentry = res; | |
815 | } | |
816 | ||
817 | /* Only creates */ | |
2b0143b5 | 818 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
e45198a6 | 819 | return finish_no_open(file, res); |
e43ae79c MS |
820 | |
821 | err = 0; | |
fae74696 | 822 | |
e43ae79c MS |
823 | v9ses = v9fs_inode2v9ses(dir); |
824 | perm = unixmode2p9mode(v9ses, mode); | |
825 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
826 | v9fs_uflags2omode(flags, | |
827 | v9fs_proto_dotu(v9ses))); | |
828 | if (IS_ERR(fid)) { | |
829 | err = PTR_ERR(fid); | |
830 | fid = NULL; | |
831 | goto error; | |
832 | } | |
833 | ||
834 | v9fs_invalidate_inode_attr(dir); | |
987a6485 GK |
835 | inode = d_inode(dentry); |
836 | v9inode = V9FS_I(inode); | |
e43ae79c | 837 | mutex_lock(&v9inode->v_mutex); |
fb89b45c DM |
838 | if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && |
839 | !v9inode->writeback_fid && | |
e43ae79c MS |
840 | ((flags & O_ACCMODE) != O_RDONLY)) { |
841 | /* | |
842 | * clone a fid and add it to writeback_fid | |
843 | * we do it during open time instead of | |
844 | * page dirty time via write_begin/page_mkwrite | |
845 | * because we want write after unlink usecase | |
846 | * to work. | |
847 | */ | |
848 | inode_fid = v9fs_writeback_fid(dentry); | |
849 | if (IS_ERR(inode_fid)) { | |
850 | err = PTR_ERR(inode_fid); | |
851 | mutex_unlock(&v9inode->v_mutex); | |
852 | goto error; | |
853 | } | |
854 | v9inode->writeback_fid = (void *) inode_fid; | |
855 | } | |
856 | mutex_unlock(&v9inode->v_mutex); | |
be12af3e | 857 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 858 | if (err) |
e43ae79c | 859 | goto error; |
e43ae79c | 860 | |
30d90494 | 861 | file->private_data = fid; |
fb89b45c | 862 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
2b0143b5 | 863 | v9fs_cache_inode_set_cookie(d_inode(dentry), file); |
987a6485 | 864 | v9fs_open_fid_add(inode, fid); |
e43ae79c | 865 | |
73a09dd9 | 866 | file->f_mode |= FMODE_CREATED; |
e43ae79c MS |
867 | out: |
868 | dput(res); | |
d9585277 | 869 | return err; |
e43ae79c MS |
870 | |
871 | error: | |
872 | if (fid) | |
873 | p9_client_clunk(fid); | |
e43ae79c MS |
874 | goto out; |
875 | } | |
876 | ||
2bad8471 EVH |
877 | /** |
878 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
879 | * @i: inode that is being unlinked | |
73c592b9 | 880 | * @d: dentry that is being unlinked |
2bad8471 EVH |
881 | * |
882 | */ | |
883 | ||
53c06f4e | 884 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
2bad8471 EVH |
885 | { |
886 | return v9fs_remove(i, d, 0); | |
887 | } | |
888 | ||
889 | /** | |
890 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
891 | * @i: inode that is being unlinked | |
73c592b9 | 892 | * @d: dentry that is being unlinked |
2bad8471 EVH |
893 | * |
894 | */ | |
895 | ||
53c06f4e | 896 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
2bad8471 | 897 | { |
48e370ff | 898 | return v9fs_remove(i, d, AT_REMOVEDIR); |
2bad8471 EVH |
899 | } |
900 | ||
901 | /** | |
902 | * v9fs_vfs_rename - VFS hook to rename an inode | |
903 | * @old_dir: old dir inode | |
904 | * @old_dentry: old dentry | |
905 | * @new_dir: new dir inode | |
906 | * @new_dentry: new dentry | |
907 | * | |
908 | */ | |
909 | ||
53c06f4e | 910 | int |
549c7297 CB |
911 | v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, |
912 | struct dentry *old_dentry, struct inode *new_dir, | |
913 | struct dentry *new_dentry, unsigned int flags) | |
2bad8471 | 914 | { |
d28c61f0 | 915 | int retval; |
bd238fb4 | 916 | struct inode *old_inode; |
b271ec47 | 917 | struct inode *new_inode; |
bd238fb4 | 918 | struct v9fs_session_info *v9ses; |
6636b6dc | 919 | struct p9_fid *oldfid, *dfid; |
bd238fb4 LI |
920 | struct p9_fid *olddirfid; |
921 | struct p9_fid *newdirfid; | |
922 | struct p9_wstat wstat; | |
2bad8471 | 923 | |
1cd66c93 MS |
924 | if (flags) |
925 | return -EINVAL; | |
926 | ||
5d385153 | 927 | p9_debug(P9_DEBUG_VFS, "\n"); |
bd238fb4 | 928 | retval = 0; |
2b0143b5 DH |
929 | old_inode = d_inode(old_dentry); |
930 | new_inode = d_inode(new_dentry); | |
bd238fb4 LI |
931 | v9ses = v9fs_inode2v9ses(old_inode); |
932 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 933 | if (IS_ERR(oldfid)) |
da977b2c EVH |
934 | return PTR_ERR(oldfid); |
935 | ||
6636b6dc JW |
936 | dfid = v9fs_parent_fid(old_dentry); |
937 | olddirfid = clone_fid(dfid); | |
938 | if (dfid && !IS_ERR(dfid)) | |
939 | p9_client_clunk(dfid); | |
940 | ||
ba17674f | 941 | if (IS_ERR(olddirfid)) { |
da977b2c | 942 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 943 | goto done; |
da977b2c EVH |
944 | } |
945 | ||
6636b6dc JW |
946 | dfid = v9fs_parent_fid(new_dentry); |
947 | newdirfid = clone_fid(dfid); | |
948 | p9_client_clunk(dfid); | |
949 | ||
ba17674f | 950 | if (IS_ERR(newdirfid)) { |
da977b2c | 951 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 952 | goto clunk_olddir; |
2bad8471 EVH |
953 | } |
954 | ||
a534c8d1 | 955 | down_write(&v9ses->rename_sem); |
4681dbda | 956 | if (v9fs_proto_dotl(v9ses)) { |
9e8fb38e AK |
957 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
958 | newdirfid, new_dentry->d_name.name); | |
959 | if (retval == -EOPNOTSUPP) | |
960 | retval = p9_client_rename(oldfid, newdirfid, | |
961 | new_dentry->d_name.name); | |
962 | if (retval != -EOPNOTSUPP) | |
4681dbda SK |
963 | goto clunk_newdir; |
964 | } | |
a534c8d1 AK |
965 | if (old_dentry->d_parent != new_dentry->d_parent) { |
966 | /* | |
967 | * 9P .u can only handle file rename in the same directory | |
968 | */ | |
4681dbda | 969 | |
5d385153 | 970 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
621997cd | 971 | retval = -EXDEV; |
bd238fb4 | 972 | goto clunk_newdir; |
2bad8471 | 973 | } |
531b1094 | 974 | v9fs_blank_wstat(&wstat); |
ba17674f | 975 | wstat.muid = v9ses->uname; |
7880b43b | 976 | wstat.name = new_dentry->d_name.name; |
bd238fb4 | 977 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 978 | |
bd238fb4 | 979 | clunk_newdir: |
b271ec47 AK |
980 | if (!retval) { |
981 | if (new_inode) { | |
982 | if (S_ISDIR(new_inode->i_mode)) | |
983 | clear_nlink(new_inode); | |
984 | else | |
ac89b2ef | 985 | v9fs_dec_count(new_inode); |
b271ec47 AK |
986 | } |
987 | if (S_ISDIR(old_inode->i_mode)) { | |
988 | if (!new_inode) | |
989 | inc_nlink(new_dir); | |
ac89b2ef | 990 | v9fs_dec_count(old_dir); |
b271ec47 | 991 | } |
3bc86de3 | 992 | v9fs_invalidate_inode_attr(old_inode); |
d28c61f0 AK |
993 | v9fs_invalidate_inode_attr(old_dir); |
994 | v9fs_invalidate_inode_attr(new_dir); | |
3bc86de3 | 995 | |
a534c8d1 AK |
996 | /* successful rename */ |
997 | d_move(old_dentry, new_dentry); | |
b271ec47 | 998 | } |
a534c8d1 | 999 | up_write(&v9ses->rename_sem); |
22150c4f | 1000 | p9_client_clunk(newdirfid); |
2bad8471 | 1001 | |
bd238fb4 | 1002 | clunk_olddir: |
22150c4f | 1003 | p9_client_clunk(olddirfid); |
da977b2c | 1004 | |
bd238fb4 | 1005 | done: |
6636b6dc | 1006 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1007 | return retval; |
1008 | } | |
1009 | ||
1010 | /** | |
943ffb58 | 1011 | * v9fs_vfs_getattr - retrieve file metadata |
a528d35e | 1012 | * @path: Object to query |
ee443996 | 1013 | * @stat: metadata structure to populate |
a528d35e DH |
1014 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
1015 | * @flags: AT_STATX_xxx setting | |
2bad8471 EVH |
1016 | * |
1017 | */ | |
1018 | ||
1019 | static int | |
549c7297 CB |
1020 | v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path, |
1021 | struct kstat *stat, u32 request_mask, unsigned int flags) | |
2bad8471 | 1022 | { |
a528d35e | 1023 | struct dentry *dentry = path->dentry; |
bd238fb4 LI |
1024 | struct v9fs_session_info *v9ses; |
1025 | struct p9_fid *fid; | |
51a87c55 | 1026 | struct p9_wstat *st; |
bd238fb4 | 1027 | |
5d385153 | 1028 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 1029 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 | 1030 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
0d56a451 | 1031 | generic_fillattr(&init_user_ns, d_inode(dentry), stat); |
a1211908 AK |
1032 | return 0; |
1033 | } | |
bd238fb4 LI |
1034 | fid = v9fs_fid_lookup(dentry); |
1035 | if (IS_ERR(fid)) | |
da977b2c | 1036 | return PTR_ERR(fid); |
2bad8471 | 1037 | |
bd238fb4 | 1038 | st = p9_client_stat(fid); |
6636b6dc | 1039 | p9_client_clunk(fid); |
bd238fb4 LI |
1040 | if (IS_ERR(st)) |
1041 | return PTR_ERR(st); | |
2bad8471 | 1042 | |
5e3cc1ee | 1043 | v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); |
0d56a451 | 1044 | generic_fillattr(&init_user_ns, d_inode(dentry), stat); |
2bad8471 | 1045 | |
62b2be59 | 1046 | p9stat_free(st); |
bd238fb4 LI |
1047 | kfree(st); |
1048 | return 0; | |
2bad8471 EVH |
1049 | } |
1050 | ||
1051 | /** | |
1052 | * v9fs_vfs_setattr - set file metadata | |
1053 | * @dentry: file whose metadata to set | |
1054 | * @iattr: metadata assignment structure | |
1055 | * | |
1056 | */ | |
1057 | ||
549c7297 CB |
1058 | static int v9fs_vfs_setattr(struct user_namespace *mnt_userns, |
1059 | struct dentry *dentry, struct iattr *iattr) | |
2bad8471 | 1060 | { |
6636b6dc | 1061 | int retval, use_dentry = 0; |
bd238fb4 | 1062 | struct v9fs_session_info *v9ses; |
66246641 | 1063 | struct p9_fid *fid = NULL; |
bd238fb4 | 1064 | struct p9_wstat wstat; |
2bad8471 | 1065 | |
5d385153 | 1066 | p9_debug(P9_DEBUG_VFS, "\n"); |
2f221d6f | 1067 | retval = setattr_prepare(&init_user_ns, dentry, iattr); |
059c138b AK |
1068 | if (retval) |
1069 | return retval; | |
1070 | ||
bd238fb4 | 1071 | retval = -EPERM; |
42869c8a | 1072 | v9ses = v9fs_dentry2v9ses(dentry); |
66246641 JW |
1073 | if (iattr->ia_valid & ATTR_FILE) { |
1074 | fid = iattr->ia_file->private_data; | |
1075 | WARN_ON(!fid); | |
1076 | } | |
6636b6dc | 1077 | if (!fid) { |
66246641 | 1078 | fid = v9fs_fid_lookup(dentry); |
6636b6dc JW |
1079 | use_dentry = 1; |
1080 | } | |
da977b2c EVH |
1081 | if(IS_ERR(fid)) |
1082 | return PTR_ERR(fid); | |
2bad8471 | 1083 | |
531b1094 | 1084 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1085 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1086 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1087 | |
1088 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1089 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1090 | |
1091 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1092 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1093 | |
1094 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1095 | wstat.length = iattr->ia_size; |
2bad8471 | 1096 | |
dd6102fb | 1097 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1098 | if (iattr->ia_valid & ATTR_UID) |
1099 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1100 | |
531b1094 LI |
1101 | if (iattr->ia_valid & ATTR_GID) |
1102 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 | 1103 | } |
059c138b | 1104 | |
3dc5436a | 1105 | /* Write all dirty data */ |
e36cb0b8 | 1106 | if (d_is_reg(dentry)) |
2b0143b5 | 1107 | filemap_write_and_wait(d_inode(dentry)->i_mapping); |
3dc5436a | 1108 | |
f10fc50f | 1109 | retval = p9_client_wstat(fid, &wstat); |
6636b6dc JW |
1110 | |
1111 | if (use_dentry) | |
1112 | p9_client_clunk(fid); | |
1113 | ||
f10fc50f AK |
1114 | if (retval < 0) |
1115 | return retval; | |
059c138b AK |
1116 | |
1117 | if ((iattr->ia_valid & ATTR_SIZE) && | |
2b0143b5 DH |
1118 | iattr->ia_size != i_size_read(d_inode(dentry))) |
1119 | truncate_setsize(d_inode(dentry), iattr->ia_size); | |
059c138b | 1120 | |
2b0143b5 | 1121 | v9fs_invalidate_inode_attr(d_inode(dentry)); |
2bad8471 | 1122 | |
2f221d6f | 1123 | setattr_copy(&init_user_ns, d_inode(dentry), iattr); |
2b0143b5 | 1124 | mark_inode_dirty(d_inode(dentry)); |
1025774c | 1125 | return 0; |
2bad8471 EVH |
1126 | } |
1127 | ||
1128 | /** | |
531b1094 LI |
1129 | * v9fs_stat2inode - populate an inode structure with mistat info |
1130 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1131 | * @inode: inode to populate |
1132 | * @sb: superblock of filesystem | |
5e3cc1ee | 1133 | * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
2bad8471 EVH |
1134 | * |
1135 | */ | |
1136 | ||
1137 | void | |
51a87c55 | 1138 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
5e3cc1ee | 1139 | struct super_block *sb, unsigned int flags) |
2bad8471 | 1140 | { |
3eda0de6 | 1141 | umode_t mode; |
531b1094 | 1142 | char ext[32]; |
5717144a AK |
1143 | char tag_name[14]; |
1144 | unsigned int i_nlink; | |
2bad8471 | 1145 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
b3cbea03 | 1146 | struct v9fs_inode *v9inode = V9FS_I(inode); |
2bad8471 | 1147 | |
bfe86848 | 1148 | set_nlink(inode, 1); |
2bad8471 | 1149 | |
531b1094 LI |
1150 | inode->i_atime.tv_sec = stat->atime; |
1151 | inode->i_mtime.tv_sec = stat->mtime; | |
1152 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1153 | |
bd32b82d LI |
1154 | inode->i_uid = v9ses->dfltuid; |
1155 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1156 | |
dd6102fb | 1157 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1158 | inode->i_uid = stat->n_uid; |
1159 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1160 | } |
5717144a AK |
1161 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
1162 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { | |
1163 | /* | |
1164 | * Hadlink support got added later to | |
1165 | * to the .u extension. So there can be | |
1166 | * server out there that doesn't support | |
1167 | * this even with .u extension. So check | |
1168 | * for non NULL stat->extension | |
1169 | */ | |
b3f8ab4b | 1170 | strlcpy(ext, stat->extension, sizeof(ext)); |
5717144a AK |
1171 | /* HARDLINKCOUNT %u */ |
1172 | sscanf(ext, "%13s %u", tag_name, &i_nlink); | |
1173 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) | |
bfe86848 | 1174 | set_nlink(inode, i_nlink); |
5717144a AK |
1175 | } |
1176 | } | |
df345c67 | 1177 | mode = p9mode2perm(v9ses, stat); |
45089142 AK |
1178 | mode |= inode->i_mode & ~S_IALLUGO; |
1179 | inode->i_mode = mode; | |
2bad8471 | 1180 | |
5e3cc1ee HT |
1181 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
1182 | v9fs_i_size_write(inode, stat->length); | |
bd238fb4 | 1183 | /* not real number of blocks, but 512 byte ones ... */ |
5e3cc1ee | 1184 | inode->i_blocks = (stat->length + 512 - 1) >> 9; |
b3cbea03 | 1185 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
2bad8471 EVH |
1186 | } |
1187 | ||
1188 | /** | |
1189 | * v9fs_qid2ino - convert qid into inode number | |
1190 | * @qid: qid to hash | |
1191 | * | |
1192 | * BUG: potential for inode number collisions? | |
1193 | */ | |
1194 | ||
bd238fb4 | 1195 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1196 | { |
1197 | u64 path = qid->path + 2; | |
1198 | ino_t i = 0; | |
1199 | ||
1200 | if (sizeof(ino_t) == sizeof(path)) | |
1201 | memcpy(&i, &path, sizeof(ino_t)); | |
1202 | else | |
1203 | i = (ino_t) (path ^ (path >> 32)); | |
1204 | ||
1205 | return i; | |
1206 | } | |
1207 | ||
2bad8471 | 1208 | /** |
6b255391 | 1209 | * v9fs_vfs_get_link - follow a symlink path |
2bad8471 | 1210 | * @dentry: dentry for symlink |
6b255391 | 1211 | * @inode: inode for symlink |
fceef393 | 1212 | * @done: delayed call for when we are done with the return value |
2bad8471 EVH |
1213 | */ |
1214 | ||
6b255391 | 1215 | static const char *v9fs_vfs_get_link(struct dentry *dentry, |
fceef393 AV |
1216 | struct inode *inode, |
1217 | struct delayed_call *done) | |
2bad8471 | 1218 | { |
6b255391 AV |
1219 | struct v9fs_session_info *v9ses; |
1220 | struct p9_fid *fid; | |
51a87c55 | 1221 | struct p9_wstat *st; |
680baacb | 1222 | char *res; |
2bad8471 | 1223 | |
6b255391 AV |
1224 | if (!dentry) |
1225 | return ERR_PTR(-ECHILD); | |
1226 | ||
1227 | v9ses = v9fs_dentry2v9ses(dentry); | |
1228 | fid = v9fs_fid_lookup(dentry); | |
90e4fc88 AV |
1229 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
1230 | ||
ba17674f | 1231 | if (IS_ERR(fid)) |
90e4fc88 | 1232 | return ERR_CAST(fid); |
2bad8471 | 1233 | |
329176cc | 1234 | if (!v9fs_proto_dotu(v9ses)) |
90e4fc88 | 1235 | return ERR_PTR(-EBADF); |
2bad8471 | 1236 | |
bd238fb4 | 1237 | st = p9_client_stat(fid); |
6636b6dc | 1238 | p9_client_clunk(fid); |
bd238fb4 | 1239 | if (IS_ERR(st)) |
90e4fc88 | 1240 | return ERR_CAST(st); |
2bad8471 | 1241 | |
bd238fb4 | 1242 | if (!(st->mode & P9_DMSYMLINK)) { |
90e4fc88 AV |
1243 | p9stat_free(st); |
1244 | kfree(st); | |
1245 | return ERR_PTR(-EINVAL); | |
2bad8471 | 1246 | } |
680baacb | 1247 | res = st->extension; |
90e4fc88 | 1248 | st->extension = NULL; |
680baacb AV |
1249 | if (strlen(res) >= PATH_MAX) |
1250 | res[PATH_MAX - 1] = '\0'; | |
1251 | ||
62b2be59 | 1252 | p9stat_free(st); |
bd238fb4 | 1253 | kfree(st); |
fceef393 AV |
1254 | set_delayed_call(done, kfree_link, res); |
1255 | return res; | |
2bad8471 EVH |
1256 | } |
1257 | ||
ee443996 EVH |
1258 | /** |
1259 | * v9fs_vfs_mkspecial - create a special file | |
1260 | * @dir: inode to create special file in | |
1261 | * @dentry: dentry to create | |
fd2916bd | 1262 | * @perm: mode to create special file |
ee443996 EVH |
1263 | * @extension: 9p2000.u format extension string representing special file |
1264 | * | |
1265 | */ | |
1266 | ||
531b1094 | 1267 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
c2837de7 | 1268 | u32 perm, const char *extension) |
2bad8471 | 1269 | { |
bd238fb4 | 1270 | struct p9_fid *fid; |
d28c61f0 | 1271 | struct v9fs_session_info *v9ses; |
2bad8471 | 1272 | |
6a3124a3 | 1273 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1274 | if (!v9fs_proto_dotu(v9ses)) { |
5d385153 | 1275 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1276 | return -EPERM; |
2bad8471 EVH |
1277 | } |
1278 | ||
bd238fb4 LI |
1279 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1280 | P9_OREAD); | |
1281 | if (IS_ERR(fid)) | |
1282 | return PTR_ERR(fid); | |
da977b2c | 1283 | |
d28c61f0 | 1284 | v9fs_invalidate_inode_attr(dir); |
bd238fb4 | 1285 | p9_client_clunk(fid); |
6a3124a3 | 1286 | return 0; |
531b1094 LI |
1287 | } |
1288 | ||
1289 | /** | |
1290 | * v9fs_vfs_symlink - helper function to create symlinks | |
1291 | * @dir: directory inode containing symlink | |
1292 | * @dentry: dentry for symlink | |
1293 | * @symname: symlink data | |
1294 | * | |
ee443996 | 1295 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1296 | * |
1297 | */ | |
1298 | ||
1299 | static int | |
549c7297 CB |
1300 | v9fs_vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, |
1301 | struct dentry *dentry, const char *symname) | |
531b1094 | 1302 | { |
4b8e9923 AV |
1303 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", |
1304 | dir->i_ino, dentry, symname); | |
531b1094 | 1305 | |
c2837de7 | 1306 | return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); |
531b1094 LI |
1307 | } |
1308 | ||
b46c267e AV |
1309 | #define U32_MAX_DIGITS 10 |
1310 | ||
531b1094 LI |
1311 | /** |
1312 | * v9fs_vfs_link - create a hardlink | |
1313 | * @old_dentry: dentry for file to link to | |
1314 | * @dir: inode destination for new link | |
1315 | * @dentry: dentry for link | |
1316 | * | |
1317 | */ | |
1318 | ||
531b1094 LI |
1319 | static int |
1320 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1321 | struct dentry *dentry) | |
1322 | { | |
1323 | int retval; | |
b46c267e | 1324 | char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ |
d28c61f0 | 1325 | struct p9_fid *oldfid; |
531b1094 | 1326 | |
4b8e9923 AV |
1327 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", |
1328 | dir->i_ino, dentry, old_dentry); | |
531b1094 | 1329 | |
da977b2c | 1330 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1331 | if (IS_ERR(oldfid)) |
da977b2c | 1332 | return PTR_ERR(oldfid); |
531b1094 | 1333 | |
16cce6d2 | 1334 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1335 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
c06c066a | 1336 | if (!retval) { |
2b0143b5 | 1337 | v9fs_refresh_inode(oldfid, d_inode(old_dentry)); |
d28c61f0 | 1338 | v9fs_invalidate_inode_attr(dir); |
c06c066a | 1339 | } |
bd238fb4 | 1340 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1341 | return retval; |
1342 | } | |
1343 | ||
1344 | /** | |
1345 | * v9fs_vfs_mknod - create a special file | |
1346 | * @dir: inode destination for new link | |
1347 | * @dentry: dentry for file | |
1348 | * @mode: mode for creation | |
ee443996 | 1349 | * @rdev: device associated with special file |
2bad8471 EVH |
1350 | * |
1351 | */ | |
1352 | ||
1353 | static int | |
549c7297 CB |
1354 | v9fs_vfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, |
1355 | struct dentry *dentry, umode_t mode, dev_t rdev) | |
2bad8471 | 1356 | { |
c2837de7 | 1357 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
531b1094 | 1358 | int retval; |
b46c267e | 1359 | char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; |
c2837de7 | 1360 | u32 perm; |
2bad8471 | 1361 | |
4b8e9923 AV |
1362 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", |
1363 | dir->i_ino, dentry, mode, | |
5d385153 | 1364 | MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1365 | |
2bad8471 EVH |
1366 | /* build extension */ |
1367 | if (S_ISBLK(mode)) | |
531b1094 | 1368 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1369 | else if (S_ISCHR(mode)) |
531b1094 | 1370 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
b46c267e | 1371 | else |
75cc5c9b | 1372 | *name = 0; |
2bad8471 | 1373 | |
c2837de7 AV |
1374 | perm = unixmode2p9mode(v9ses, mode); |
1375 | retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); | |
2bad8471 EVH |
1376 | |
1377 | return retval; | |
1378 | } | |
1379 | ||
b3cbea03 AK |
1380 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
1381 | { | |
45089142 AK |
1382 | int umode; |
1383 | dev_t rdev; | |
b3cbea03 AK |
1384 | struct p9_wstat *st; |
1385 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 1386 | unsigned int flags; |
b3cbea03 AK |
1387 | |
1388 | v9ses = v9fs_inode2v9ses(inode); | |
1389 | st = p9_client_stat(fid); | |
1390 | if (IS_ERR(st)) | |
1391 | return PTR_ERR(st); | |
45089142 AK |
1392 | /* |
1393 | * Don't update inode if the file type is different | |
1394 | */ | |
1395 | umode = p9mode2unixmode(v9ses, st, &rdev); | |
1396 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) | |
1397 | goto out; | |
b3cbea03 | 1398 | |
b3cbea03 AK |
1399 | /* |
1400 | * We don't want to refresh inode->i_size, | |
1401 | * because we may have cached data | |
1402 | */ | |
5e3cc1ee HT |
1403 | flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? |
1404 | V9FS_STAT2INODE_KEEP_ISIZE : 0; | |
1405 | v9fs_stat2inode(st, inode, inode->i_sb, flags); | |
45089142 | 1406 | out: |
b3cbea03 AK |
1407 | p9stat_free(st); |
1408 | kfree(st); | |
1409 | return 0; | |
1410 | } | |
1411 | ||
9b6533c9 SK |
1412 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1413 | .create = v9fs_vfs_create, | |
1414 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1415 | .atomic_open = v9fs_vfs_atomic_open, |
9b6533c9 | 1416 | .symlink = v9fs_vfs_symlink, |
50cc42ff | 1417 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1418 | .unlink = v9fs_vfs_unlink, |
1419 | .mkdir = v9fs_vfs_mkdir, | |
1420 | .rmdir = v9fs_vfs_rmdir, | |
1d76e313 | 1421 | .mknod = v9fs_vfs_mknod, |
9b6533c9 SK |
1422 | .rename = v9fs_vfs_rename, |
1423 | .getattr = v9fs_vfs_getattr, | |
1424 | .setattr = v9fs_vfs_setattr, | |
1425 | }; | |
1426 | ||
754661f1 | 1427 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1428 | .create = v9fs_vfs_create, |
1429 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1430 | .atomic_open = v9fs_vfs_atomic_open, |
b501611a EVH |
1431 | .unlink = v9fs_vfs_unlink, |
1432 | .mkdir = v9fs_vfs_mkdir, | |
1433 | .rmdir = v9fs_vfs_rmdir, | |
1434 | .mknod = v9fs_vfs_mknod, | |
1435 | .rename = v9fs_vfs_rename, | |
1436 | .getattr = v9fs_vfs_getattr, | |
1437 | .setattr = v9fs_vfs_setattr, | |
1438 | }; | |
1439 | ||
754661f1 | 1440 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1441 | .getattr = v9fs_vfs_getattr, |
1442 | .setattr = v9fs_vfs_setattr, | |
1443 | }; | |
1444 | ||
754661f1 | 1445 | static const struct inode_operations v9fs_symlink_inode_operations = { |
6b255391 | 1446 | .get_link = v9fs_vfs_get_link, |
2bad8471 EVH |
1447 | .getattr = v9fs_vfs_getattr, |
1448 | .setattr = v9fs_vfs_setattr, | |
1449 | }; | |
9b6533c9 | 1450 |