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 AK |
225 | struct v9fs_inode *v9inode; |
226 | v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, | |
227 | GFP_KERNEL); | |
228 | if (!v9inode) | |
60e78d2c | 229 | return NULL; |
a78ce05d AK |
230 | #ifdef CONFIG_9P_FSCACHE |
231 | v9inode->fscache = NULL; | |
8f5fed1e | 232 | mutex_init(&v9inode->fscache_lock); |
a78ce05d | 233 | #endif |
6b39f6d2 | 234 | v9inode->writeback_fid = NULL; |
b3cbea03 | 235 | v9inode->cache_validity = 0; |
5a7e0a8c | 236 | mutex_init(&v9inode->v_mutex); |
a78ce05d | 237 | return &v9inode->vfs_inode; |
60e78d2c AK |
238 | } |
239 | ||
240 | /** | |
5e8a0770 | 241 | * v9fs_free_inode - destroy an inode |
60e78d2c AK |
242 | * |
243 | */ | |
244 | ||
5e8a0770 | 245 | void v9fs_free_inode(struct inode *inode) |
60e78d2c | 246 | { |
a78ce05d | 247 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
60e78d2c | 248 | } |
fa0d7e3d | 249 | |
5ffc0cb3 | 250 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
3eda0de6 | 251 | struct inode *inode, umode_t mode, dev_t rdev) |
2bad8471 | 252 | { |
5ffc0cb3 | 253 | int err = 0; |
2bb54115 | 254 | |
217f206d | 255 | inode_init_owner(inode, NULL, mode); |
2bb54115 | 256 | inode->i_blocks = 0; |
45089142 | 257 | inode->i_rdev = rdev; |
078cd827 | 258 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
2bb54115 AK |
259 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
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)); | |
48e370ff AK |
554 | if (retval == -EOPNOTSUPP) { |
555 | /* Try the one based on path */ | |
556 | v9fid = v9fs_fid_clone(dentry); | |
557 | if (IS_ERR(v9fid)) | |
558 | return PTR_ERR(v9fid); | |
559 | retval = p9_client_remove(v9fid); | |
560 | } | |
b271ec47 AK |
561 | if (!retval) { |
562 | /* | |
563 | * directories on unlink should have zero | |
564 | * link count | |
565 | */ | |
48e370ff AK |
566 | if (flags & AT_REMOVEDIR) { |
567 | clear_nlink(inode); | |
ac89b2ef | 568 | v9fs_dec_count(dir); |
b271ec47 | 569 | } else |
ac89b2ef | 570 | v9fs_dec_count(inode); |
d28c61f0 | 571 | |
48e370ff | 572 | v9fs_invalidate_inode_attr(inode); |
d28c61f0 | 573 | v9fs_invalidate_inode_attr(dir); |
b271ec47 | 574 | } |
d994f405 | 575 | return retval; |
2bad8471 EVH |
576 | } |
577 | ||
578 | /** | |
bd238fb4 | 579 | * v9fs_create - Create a file |
ee443996 EVH |
580 | * @v9ses: session information |
581 | * @dir: directory that dentry is being created in | |
bd238fb4 | 582 | * @dentry: dentry that is being created |
0e15597e | 583 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
584 | * @perm: create permissions |
585 | * @mode: open mode | |
2bad8471 EVH |
586 | * |
587 | */ | |
bd238fb4 LI |
588 | static struct p9_fid * |
589 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
590 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 591 | { |
6a3124a3 | 592 | int err; |
7880b43b | 593 | const unsigned char *name; |
bd238fb4 | 594 | struct p9_fid *dfid, *ofid, *fid; |
6a3124a3 | 595 | struct inode *inode; |
6a3124a3 | 596 | |
4b8e9923 | 597 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
51a87c55 | 598 | |
bd238fb4 LI |
599 | err = 0; |
600 | ofid = NULL; | |
601 | fid = NULL; | |
7880b43b | 602 | name = dentry->d_name.name; |
77d5a6b7 | 603 | dfid = v9fs_parent_fid(dentry); |
ba17674f | 604 | if (IS_ERR(dfid)) { |
da977b2c | 605 | err = PTR_ERR(dfid); |
5d385153 | 606 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
6d27e64d | 607 | return ERR_PTR(err); |
da977b2c | 608 | } |
6a3124a3 | 609 | |
bd238fb4 | 610 | /* clone a fid to use for creation */ |
7d50a29f | 611 | ofid = clone_fid(dfid); |
bd238fb4 LI |
612 | if (IS_ERR(ofid)) { |
613 | err = PTR_ERR(ofid); | |
5d385153 | 614 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
6d27e64d | 615 | return ERR_PTR(err); |
bd238fb4 | 616 | } |
6a3124a3 | 617 | |
bd238fb4 | 618 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 | 619 | if (err < 0) { |
5d385153 | 620 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
6a3124a3 | 621 | goto error; |
6d27e64d | 622 | } |
6a3124a3 | 623 | |
b6054793 AK |
624 | if (!(perm & P9_DMLINK)) { |
625 | /* now walk from the parent so we can get unopened fid */ | |
626 | fid = p9_client_walk(dfid, 1, &name, 1); | |
627 | if (IS_ERR(fid)) { | |
628 | err = PTR_ERR(fid); | |
629 | p9_debug(P9_DEBUG_VFS, | |
630 | "p9_client_walk failed %d\n", err); | |
631 | fid = NULL; | |
632 | goto error; | |
633 | } | |
634 | /* | |
635 | * instantiate inode and assign the unopened fid to the dentry | |
636 | */ | |
637 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
638 | if (IS_ERR(inode)) { | |
639 | err = PTR_ERR(inode); | |
640 | p9_debug(P9_DEBUG_VFS, | |
641 | "inode creation failed %d\n", err); | |
642 | goto error; | |
643 | } | |
2ea03e1d | 644 | v9fs_fid_add(dentry, fid); |
b6054793 | 645 | d_instantiate(dentry, inode); |
6a3124a3 | 646 | } |
bd238fb4 | 647 | return ofid; |
bd238fb4 | 648 | error: |
bd238fb4 LI |
649 | if (ofid) |
650 | p9_client_clunk(ofid); | |
651 | ||
652 | if (fid) | |
653 | p9_client_clunk(fid); | |
654 | ||
655 | return ERR_PTR(err); | |
656 | } | |
657 | ||
658 | /** | |
e43ae79c MS |
659 | * v9fs_vfs_create - VFS hook to create a regular file |
660 | * | |
661 | * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called | |
662 | * for mknod(2). | |
663 | * | |
ee443996 | 664 | * @dir: directory inode that is being created |
bd238fb4 LI |
665 | * @dentry: dentry that is being deleted |
666 | * @mode: create permissions | |
bd238fb4 LI |
667 | * |
668 | */ | |
6a3124a3 | 669 | |
bd238fb4 | 670 | static int |
4acdaf27 | 671 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 672 | bool excl) |
bd238fb4 | 673 | { |
e43ae79c MS |
674 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
675 | u32 perm = unixmode2p9mode(v9ses, mode); | |
676 | struct p9_fid *fid; | |
bd238fb4 | 677 | |
e43ae79c MS |
678 | /* P9_OEXCL? */ |
679 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); | |
680 | if (IS_ERR(fid)) | |
681 | return PTR_ERR(fid); | |
bd238fb4 | 682 | |
d28c61f0 | 683 | v9fs_invalidate_inode_attr(dir); |
e43ae79c | 684 | p9_client_clunk(fid); |
6a3124a3 LI |
685 | |
686 | return 0; | |
2bad8471 EVH |
687 | } |
688 | ||
689 | /** | |
690 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
ee443996 | 691 | * @dir: inode that is being unlinked |
2bad8471 EVH |
692 | * @dentry: dentry that is being unlinked |
693 | * @mode: mode for new directory | |
694 | * | |
695 | */ | |
696 | ||
18bb1db3 | 697 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
2bad8471 | 698 | { |
6a3124a3 | 699 | int err; |
bd238fb4 | 700 | u32 perm; |
bd238fb4 | 701 | struct p9_fid *fid; |
d28c61f0 | 702 | struct v9fs_session_info *v9ses; |
6a3124a3 | 703 | |
4b8e9923 | 704 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
bd238fb4 | 705 | err = 0; |
6a3124a3 | 706 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 707 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
708 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
709 | if (IS_ERR(fid)) { | |
710 | err = PTR_ERR(fid); | |
711 | fid = NULL; | |
d28c61f0 | 712 | } else { |
b271ec47 | 713 | inc_nlink(dir); |
d28c61f0 AK |
714 | v9fs_invalidate_inode_attr(dir); |
715 | } | |
6a3124a3 | 716 | |
bd238fb4 LI |
717 | if (fid) |
718 | p9_client_clunk(fid); | |
6a3124a3 | 719 | |
6a3124a3 | 720 | return err; |
2bad8471 EVH |
721 | } |
722 | ||
723 | /** | |
724 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
725 | * @dir: inode that is being walked from | |
726 | * @dentry: dentry that is being walked to? | |
fd2916bd | 727 | * @flags: lookup flags (unused) |
2bad8471 EVH |
728 | * |
729 | */ | |
730 | ||
53c06f4e | 731 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 732 | unsigned int flags) |
2bad8471 | 733 | { |
73f50717 | 734 | struct dentry *res; |
2bad8471 | 735 | struct v9fs_session_info *v9ses; |
bd238fb4 | 736 | struct p9_fid *dfid, *fid; |
2bad8471 | 737 | struct inode *inode; |
7880b43b | 738 | const unsigned char *name; |
2bad8471 | 739 | |
4b8e9923 AV |
740 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", |
741 | dir, dentry, dentry, flags); | |
2bad8471 | 742 | |
11e9b49b SK |
743 | if (dentry->d_name.len > NAME_MAX) |
744 | return ERR_PTR(-ENAMETOOLONG); | |
745 | ||
2bad8471 | 746 | v9ses = v9fs_inode2v9ses(dir); |
a534c8d1 | 747 | /* We can walk d_parent because we hold the dir->i_mutex */ |
77d5a6b7 | 748 | dfid = v9fs_parent_fid(dentry); |
bd238fb4 | 749 | if (IS_ERR(dfid)) |
e231c2ee | 750 | return ERR_CAST(dfid); |
bd238fb4 | 751 | |
73f50717 AK |
752 | /* |
753 | * Make sure we don't use a wrong inode due to parallel | |
754 | * unlink. For cached mode create calls request for new | |
755 | * inode. But with cache disabled, lookup should do this. | |
756 | */ | |
500e2ab6 AV |
757 | name = dentry->d_name.name; |
758 | fid = p9_client_walk(dfid, 1, &name, 1); | |
759 | if (fid == ERR_PTR(-ENOENT)) | |
760 | inode = NULL; | |
761 | else if (IS_ERR(fid)) | |
762 | inode = ERR_CAST(fid); | |
763 | else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) | |
73f50717 AK |
764 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
765 | else | |
766 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
73f50717 AK |
767 | /* |
768 | * If we had a rename on the server and a parallel lookup | |
769 | * for the new name, then make sure we instantiate with | |
770 | * the new name. ie look up for a/b, while on server somebody | |
771 | * moved b under k and client parallely did a lookup for | |
772 | * k/b. | |
773 | */ | |
41d28bca | 774 | res = d_splice_alias(inode, dentry); |
500e2ab6 AV |
775 | if (!IS_ERR(fid)) { |
776 | if (!res) | |
777 | v9fs_fid_add(dentry, fid); | |
778 | else if (!IS_ERR(res)) | |
779 | v9fs_fid_add(res, fid); | |
780 | else | |
781 | p9_client_clunk(fid); | |
782 | } | |
7b5be621 | 783 | return res; |
2bad8471 EVH |
784 | } |
785 | ||
d9585277 | 786 | static int |
e43ae79c | 787 | v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, |
44907d79 | 788 | struct file *file, unsigned flags, umode_t mode) |
e43ae79c MS |
789 | { |
790 | int err; | |
791 | u32 perm; | |
e43ae79c MS |
792 | struct v9fs_inode *v9inode; |
793 | struct v9fs_session_info *v9ses; | |
794 | struct p9_fid *fid, *inode_fid; | |
795 | struct dentry *res = NULL; | |
796 | ||
00699ad8 | 797 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 798 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 799 | if (IS_ERR(res)) |
d9585277 | 800 | return PTR_ERR(res); |
e43ae79c MS |
801 | |
802 | if (res) | |
803 | dentry = res; | |
804 | } | |
805 | ||
806 | /* Only creates */ | |
2b0143b5 | 807 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
e45198a6 | 808 | return finish_no_open(file, res); |
e43ae79c MS |
809 | |
810 | err = 0; | |
fae74696 | 811 | |
e43ae79c MS |
812 | v9ses = v9fs_inode2v9ses(dir); |
813 | perm = unixmode2p9mode(v9ses, mode); | |
814 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
815 | v9fs_uflags2omode(flags, | |
816 | v9fs_proto_dotu(v9ses))); | |
817 | if (IS_ERR(fid)) { | |
818 | err = PTR_ERR(fid); | |
819 | fid = NULL; | |
820 | goto error; | |
821 | } | |
822 | ||
823 | v9fs_invalidate_inode_attr(dir); | |
2b0143b5 | 824 | v9inode = V9FS_I(d_inode(dentry)); |
e43ae79c | 825 | mutex_lock(&v9inode->v_mutex); |
fb89b45c DM |
826 | if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && |
827 | !v9inode->writeback_fid && | |
e43ae79c MS |
828 | ((flags & O_ACCMODE) != O_RDONLY)) { |
829 | /* | |
830 | * clone a fid and add it to writeback_fid | |
831 | * we do it during open time instead of | |
832 | * page dirty time via write_begin/page_mkwrite | |
833 | * because we want write after unlink usecase | |
834 | * to work. | |
835 | */ | |
836 | inode_fid = v9fs_writeback_fid(dentry); | |
837 | if (IS_ERR(inode_fid)) { | |
838 | err = PTR_ERR(inode_fid); | |
839 | mutex_unlock(&v9inode->v_mutex); | |
840 | goto error; | |
841 | } | |
842 | v9inode->writeback_fid = (void *) inode_fid; | |
843 | } | |
844 | mutex_unlock(&v9inode->v_mutex); | |
be12af3e | 845 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 846 | if (err) |
e43ae79c | 847 | goto error; |
e43ae79c | 848 | |
30d90494 | 849 | file->private_data = fid; |
fb89b45c | 850 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
2b0143b5 | 851 | v9fs_cache_inode_set_cookie(d_inode(dentry), file); |
e43ae79c | 852 | |
73a09dd9 | 853 | file->f_mode |= FMODE_CREATED; |
e43ae79c MS |
854 | out: |
855 | dput(res); | |
d9585277 | 856 | return err; |
e43ae79c MS |
857 | |
858 | error: | |
859 | if (fid) | |
860 | p9_client_clunk(fid); | |
e43ae79c MS |
861 | goto out; |
862 | } | |
863 | ||
2bad8471 EVH |
864 | /** |
865 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
866 | * @i: inode that is being unlinked | |
73c592b9 | 867 | * @d: dentry that is being unlinked |
2bad8471 EVH |
868 | * |
869 | */ | |
870 | ||
53c06f4e | 871 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
2bad8471 EVH |
872 | { |
873 | return v9fs_remove(i, d, 0); | |
874 | } | |
875 | ||
876 | /** | |
877 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
878 | * @i: inode that is being unlinked | |
73c592b9 | 879 | * @d: dentry that is being unlinked |
2bad8471 EVH |
880 | * |
881 | */ | |
882 | ||
53c06f4e | 883 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
2bad8471 | 884 | { |
48e370ff | 885 | return v9fs_remove(i, d, AT_REMOVEDIR); |
2bad8471 EVH |
886 | } |
887 | ||
888 | /** | |
889 | * v9fs_vfs_rename - VFS hook to rename an inode | |
890 | * @old_dir: old dir inode | |
891 | * @old_dentry: old dentry | |
892 | * @new_dir: new dir inode | |
893 | * @new_dentry: new dentry | |
894 | * | |
895 | */ | |
896 | ||
53c06f4e | 897 | int |
2bad8471 | 898 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
1cd66c93 MS |
899 | struct inode *new_dir, struct dentry *new_dentry, |
900 | unsigned int flags) | |
2bad8471 | 901 | { |
d28c61f0 | 902 | int retval; |
bd238fb4 | 903 | struct inode *old_inode; |
b271ec47 | 904 | struct inode *new_inode; |
bd238fb4 LI |
905 | struct v9fs_session_info *v9ses; |
906 | struct p9_fid *oldfid; | |
907 | struct p9_fid *olddirfid; | |
908 | struct p9_fid *newdirfid; | |
909 | struct p9_wstat wstat; | |
2bad8471 | 910 | |
1cd66c93 MS |
911 | if (flags) |
912 | return -EINVAL; | |
913 | ||
5d385153 | 914 | p9_debug(P9_DEBUG_VFS, "\n"); |
bd238fb4 | 915 | retval = 0; |
2b0143b5 DH |
916 | old_inode = d_inode(old_dentry); |
917 | new_inode = d_inode(new_dentry); | |
bd238fb4 LI |
918 | v9ses = v9fs_inode2v9ses(old_inode); |
919 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 920 | if (IS_ERR(oldfid)) |
da977b2c EVH |
921 | return PTR_ERR(oldfid); |
922 | ||
797fc16d | 923 | olddirfid = clone_fid(v9fs_parent_fid(old_dentry)); |
ba17674f | 924 | if (IS_ERR(olddirfid)) { |
da977b2c | 925 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 926 | goto done; |
da977b2c EVH |
927 | } |
928 | ||
797fc16d | 929 | newdirfid = clone_fid(v9fs_parent_fid(new_dentry)); |
ba17674f | 930 | if (IS_ERR(newdirfid)) { |
da977b2c | 931 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 932 | goto clunk_olddir; |
2bad8471 EVH |
933 | } |
934 | ||
a534c8d1 | 935 | down_write(&v9ses->rename_sem); |
4681dbda | 936 | if (v9fs_proto_dotl(v9ses)) { |
9e8fb38e AK |
937 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
938 | newdirfid, new_dentry->d_name.name); | |
939 | if (retval == -EOPNOTSUPP) | |
940 | retval = p9_client_rename(oldfid, newdirfid, | |
941 | new_dentry->d_name.name); | |
942 | if (retval != -EOPNOTSUPP) | |
4681dbda SK |
943 | goto clunk_newdir; |
944 | } | |
a534c8d1 AK |
945 | if (old_dentry->d_parent != new_dentry->d_parent) { |
946 | /* | |
947 | * 9P .u can only handle file rename in the same directory | |
948 | */ | |
4681dbda | 949 | |
5d385153 | 950 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
621997cd | 951 | retval = -EXDEV; |
bd238fb4 | 952 | goto clunk_newdir; |
2bad8471 | 953 | } |
531b1094 | 954 | v9fs_blank_wstat(&wstat); |
ba17674f | 955 | wstat.muid = v9ses->uname; |
7880b43b | 956 | wstat.name = new_dentry->d_name.name; |
bd238fb4 | 957 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 958 | |
bd238fb4 | 959 | clunk_newdir: |
b271ec47 AK |
960 | if (!retval) { |
961 | if (new_inode) { | |
962 | if (S_ISDIR(new_inode->i_mode)) | |
963 | clear_nlink(new_inode); | |
964 | else | |
ac89b2ef | 965 | v9fs_dec_count(new_inode); |
b271ec47 AK |
966 | } |
967 | if (S_ISDIR(old_inode->i_mode)) { | |
968 | if (!new_inode) | |
969 | inc_nlink(new_dir); | |
ac89b2ef | 970 | v9fs_dec_count(old_dir); |
b271ec47 | 971 | } |
3bc86de3 | 972 | v9fs_invalidate_inode_attr(old_inode); |
d28c61f0 AK |
973 | v9fs_invalidate_inode_attr(old_dir); |
974 | v9fs_invalidate_inode_attr(new_dir); | |
3bc86de3 | 975 | |
a534c8d1 AK |
976 | /* successful rename */ |
977 | d_move(old_dentry, new_dentry); | |
b271ec47 | 978 | } |
a534c8d1 | 979 | up_write(&v9ses->rename_sem); |
22150c4f | 980 | p9_client_clunk(newdirfid); |
2bad8471 | 981 | |
bd238fb4 | 982 | clunk_olddir: |
22150c4f | 983 | p9_client_clunk(olddirfid); |
da977b2c | 984 | |
bd238fb4 | 985 | done: |
2bad8471 EVH |
986 | return retval; |
987 | } | |
988 | ||
989 | /** | |
943ffb58 | 990 | * v9fs_vfs_getattr - retrieve file metadata |
a528d35e | 991 | * @path: Object to query |
ee443996 | 992 | * @stat: metadata structure to populate |
a528d35e DH |
993 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
994 | * @flags: AT_STATX_xxx setting | |
2bad8471 EVH |
995 | * |
996 | */ | |
997 | ||
998 | static int | |
a528d35e DH |
999 | v9fs_vfs_getattr(const struct path *path, struct kstat *stat, |
1000 | u32 request_mask, unsigned int flags) | |
2bad8471 | 1001 | { |
a528d35e | 1002 | struct dentry *dentry = path->dentry; |
bd238fb4 LI |
1003 | struct v9fs_session_info *v9ses; |
1004 | struct p9_fid *fid; | |
51a87c55 | 1005 | struct p9_wstat *st; |
bd238fb4 | 1006 | |
5d385153 | 1007 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 1008 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 | 1009 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
2b0143b5 | 1010 | generic_fillattr(d_inode(dentry), stat); |
a1211908 AK |
1011 | return 0; |
1012 | } | |
bd238fb4 LI |
1013 | fid = v9fs_fid_lookup(dentry); |
1014 | if (IS_ERR(fid)) | |
da977b2c | 1015 | return PTR_ERR(fid); |
2bad8471 | 1016 | |
bd238fb4 LI |
1017 | st = p9_client_stat(fid); |
1018 | if (IS_ERR(st)) | |
1019 | return PTR_ERR(st); | |
2bad8471 | 1020 | |
5e3cc1ee | 1021 | v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); |
2b0143b5 | 1022 | generic_fillattr(d_inode(dentry), stat); |
2bad8471 | 1023 | |
62b2be59 | 1024 | p9stat_free(st); |
bd238fb4 LI |
1025 | kfree(st); |
1026 | return 0; | |
2bad8471 EVH |
1027 | } |
1028 | ||
1029 | /** | |
1030 | * v9fs_vfs_setattr - set file metadata | |
1031 | * @dentry: file whose metadata to set | |
1032 | * @iattr: metadata assignment structure | |
1033 | * | |
1034 | */ | |
1035 | ||
1036 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
1037 | { | |
bd238fb4 LI |
1038 | int retval; |
1039 | struct v9fs_session_info *v9ses; | |
66246641 | 1040 | struct p9_fid *fid = NULL; |
bd238fb4 | 1041 | struct p9_wstat wstat; |
2bad8471 | 1042 | |
5d385153 | 1043 | p9_debug(P9_DEBUG_VFS, "\n"); |
31051c85 | 1044 | retval = setattr_prepare(dentry, iattr); |
059c138b AK |
1045 | if (retval) |
1046 | return retval; | |
1047 | ||
bd238fb4 | 1048 | retval = -EPERM; |
42869c8a | 1049 | v9ses = v9fs_dentry2v9ses(dentry); |
66246641 JW |
1050 | if (iattr->ia_valid & ATTR_FILE) { |
1051 | fid = iattr->ia_file->private_data; | |
1052 | WARN_ON(!fid); | |
1053 | } | |
1054 | if (!fid) | |
1055 | fid = v9fs_fid_lookup(dentry); | |
da977b2c EVH |
1056 | if(IS_ERR(fid)) |
1057 | return PTR_ERR(fid); | |
2bad8471 | 1058 | |
531b1094 | 1059 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1060 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1061 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1062 | |
1063 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1064 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1065 | |
1066 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1067 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1068 | |
1069 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1070 | wstat.length = iattr->ia_size; |
2bad8471 | 1071 | |
dd6102fb | 1072 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1073 | if (iattr->ia_valid & ATTR_UID) |
1074 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1075 | |
531b1094 LI |
1076 | if (iattr->ia_valid & ATTR_GID) |
1077 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 | 1078 | } |
059c138b | 1079 | |
3dc5436a | 1080 | /* Write all dirty data */ |
e36cb0b8 | 1081 | if (d_is_reg(dentry)) |
2b0143b5 | 1082 | filemap_write_and_wait(d_inode(dentry)->i_mapping); |
3dc5436a | 1083 | |
f10fc50f AK |
1084 | retval = p9_client_wstat(fid, &wstat); |
1085 | if (retval < 0) | |
1086 | return retval; | |
059c138b AK |
1087 | |
1088 | if ((iattr->ia_valid & ATTR_SIZE) && | |
2b0143b5 DH |
1089 | iattr->ia_size != i_size_read(d_inode(dentry))) |
1090 | truncate_setsize(d_inode(dentry), iattr->ia_size); | |
059c138b | 1091 | |
2b0143b5 | 1092 | v9fs_invalidate_inode_attr(d_inode(dentry)); |
2bad8471 | 1093 | |
2b0143b5 DH |
1094 | setattr_copy(d_inode(dentry), iattr); |
1095 | mark_inode_dirty(d_inode(dentry)); | |
1025774c | 1096 | return 0; |
2bad8471 EVH |
1097 | } |
1098 | ||
1099 | /** | |
531b1094 LI |
1100 | * v9fs_stat2inode - populate an inode structure with mistat info |
1101 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1102 | * @inode: inode to populate |
1103 | * @sb: superblock of filesystem | |
5e3cc1ee | 1104 | * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
2bad8471 EVH |
1105 | * |
1106 | */ | |
1107 | ||
1108 | void | |
51a87c55 | 1109 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
5e3cc1ee | 1110 | struct super_block *sb, unsigned int flags) |
2bad8471 | 1111 | { |
3eda0de6 | 1112 | umode_t mode; |
531b1094 | 1113 | char ext[32]; |
5717144a AK |
1114 | char tag_name[14]; |
1115 | unsigned int i_nlink; | |
2bad8471 | 1116 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
b3cbea03 | 1117 | struct v9fs_inode *v9inode = V9FS_I(inode); |
2bad8471 | 1118 | |
bfe86848 | 1119 | set_nlink(inode, 1); |
2bad8471 | 1120 | |
531b1094 LI |
1121 | inode->i_atime.tv_sec = stat->atime; |
1122 | inode->i_mtime.tv_sec = stat->mtime; | |
1123 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1124 | |
bd32b82d LI |
1125 | inode->i_uid = v9ses->dfltuid; |
1126 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1127 | |
dd6102fb | 1128 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1129 | inode->i_uid = stat->n_uid; |
1130 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1131 | } |
5717144a AK |
1132 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
1133 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { | |
1134 | /* | |
1135 | * Hadlink support got added later to | |
1136 | * to the .u extension. So there can be | |
1137 | * server out there that doesn't support | |
1138 | * this even with .u extension. So check | |
1139 | * for non NULL stat->extension | |
1140 | */ | |
b3f8ab4b | 1141 | strlcpy(ext, stat->extension, sizeof(ext)); |
5717144a AK |
1142 | /* HARDLINKCOUNT %u */ |
1143 | sscanf(ext, "%13s %u", tag_name, &i_nlink); | |
1144 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) | |
bfe86848 | 1145 | set_nlink(inode, i_nlink); |
5717144a AK |
1146 | } |
1147 | } | |
df345c67 | 1148 | mode = p9mode2perm(v9ses, stat); |
45089142 AK |
1149 | mode |= inode->i_mode & ~S_IALLUGO; |
1150 | inode->i_mode = mode; | |
2bad8471 | 1151 | |
5e3cc1ee HT |
1152 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
1153 | v9fs_i_size_write(inode, stat->length); | |
bd238fb4 | 1154 | /* not real number of blocks, but 512 byte ones ... */ |
5e3cc1ee | 1155 | inode->i_blocks = (stat->length + 512 - 1) >> 9; |
b3cbea03 | 1156 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
2bad8471 EVH |
1157 | } |
1158 | ||
1159 | /** | |
1160 | * v9fs_qid2ino - convert qid into inode number | |
1161 | * @qid: qid to hash | |
1162 | * | |
1163 | * BUG: potential for inode number collisions? | |
1164 | */ | |
1165 | ||
bd238fb4 | 1166 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1167 | { |
1168 | u64 path = qid->path + 2; | |
1169 | ino_t i = 0; | |
1170 | ||
1171 | if (sizeof(ino_t) == sizeof(path)) | |
1172 | memcpy(&i, &path, sizeof(ino_t)); | |
1173 | else | |
1174 | i = (ino_t) (path ^ (path >> 32)); | |
1175 | ||
1176 | return i; | |
1177 | } | |
1178 | ||
2bad8471 | 1179 | /** |
6b255391 | 1180 | * v9fs_vfs_get_link - follow a symlink path |
2bad8471 | 1181 | * @dentry: dentry for symlink |
6b255391 | 1182 | * @inode: inode for symlink |
fceef393 | 1183 | * @done: delayed call for when we are done with the return value |
2bad8471 EVH |
1184 | */ |
1185 | ||
6b255391 | 1186 | static const char *v9fs_vfs_get_link(struct dentry *dentry, |
fceef393 AV |
1187 | struct inode *inode, |
1188 | struct delayed_call *done) | |
2bad8471 | 1189 | { |
6b255391 AV |
1190 | struct v9fs_session_info *v9ses; |
1191 | struct p9_fid *fid; | |
51a87c55 | 1192 | struct p9_wstat *st; |
680baacb | 1193 | char *res; |
2bad8471 | 1194 | |
6b255391 AV |
1195 | if (!dentry) |
1196 | return ERR_PTR(-ECHILD); | |
1197 | ||
1198 | v9ses = v9fs_dentry2v9ses(dentry); | |
1199 | fid = v9fs_fid_lookup(dentry); | |
90e4fc88 AV |
1200 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
1201 | ||
ba17674f | 1202 | if (IS_ERR(fid)) |
90e4fc88 | 1203 | return ERR_CAST(fid); |
2bad8471 | 1204 | |
329176cc | 1205 | if (!v9fs_proto_dotu(v9ses)) |
90e4fc88 | 1206 | return ERR_PTR(-EBADF); |
2bad8471 | 1207 | |
bd238fb4 LI |
1208 | st = p9_client_stat(fid); |
1209 | if (IS_ERR(st)) | |
90e4fc88 | 1210 | return ERR_CAST(st); |
2bad8471 | 1211 | |
bd238fb4 | 1212 | if (!(st->mode & P9_DMSYMLINK)) { |
90e4fc88 AV |
1213 | p9stat_free(st); |
1214 | kfree(st); | |
1215 | return ERR_PTR(-EINVAL); | |
2bad8471 | 1216 | } |
680baacb | 1217 | res = st->extension; |
90e4fc88 | 1218 | st->extension = NULL; |
680baacb AV |
1219 | if (strlen(res) >= PATH_MAX) |
1220 | res[PATH_MAX - 1] = '\0'; | |
1221 | ||
62b2be59 | 1222 | p9stat_free(st); |
bd238fb4 | 1223 | kfree(st); |
fceef393 AV |
1224 | set_delayed_call(done, kfree_link, res); |
1225 | return res; | |
2bad8471 EVH |
1226 | } |
1227 | ||
ee443996 EVH |
1228 | /** |
1229 | * v9fs_vfs_mkspecial - create a special file | |
1230 | * @dir: inode to create special file in | |
1231 | * @dentry: dentry to create | |
fd2916bd | 1232 | * @perm: mode to create special file |
ee443996 EVH |
1233 | * @extension: 9p2000.u format extension string representing special file |
1234 | * | |
1235 | */ | |
1236 | ||
531b1094 | 1237 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
c2837de7 | 1238 | u32 perm, const char *extension) |
2bad8471 | 1239 | { |
bd238fb4 | 1240 | struct p9_fid *fid; |
d28c61f0 | 1241 | struct v9fs_session_info *v9ses; |
2bad8471 | 1242 | |
6a3124a3 | 1243 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1244 | if (!v9fs_proto_dotu(v9ses)) { |
5d385153 | 1245 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1246 | return -EPERM; |
2bad8471 EVH |
1247 | } |
1248 | ||
bd238fb4 LI |
1249 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1250 | P9_OREAD); | |
1251 | if (IS_ERR(fid)) | |
1252 | return PTR_ERR(fid); | |
da977b2c | 1253 | |
d28c61f0 | 1254 | v9fs_invalidate_inode_attr(dir); |
bd238fb4 | 1255 | p9_client_clunk(fid); |
6a3124a3 | 1256 | return 0; |
531b1094 LI |
1257 | } |
1258 | ||
1259 | /** | |
1260 | * v9fs_vfs_symlink - helper function to create symlinks | |
1261 | * @dir: directory inode containing symlink | |
1262 | * @dentry: dentry for symlink | |
1263 | * @symname: symlink data | |
1264 | * | |
ee443996 | 1265 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1266 | * |
1267 | */ | |
1268 | ||
1269 | static int | |
1270 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1271 | { | |
4b8e9923 AV |
1272 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", |
1273 | dir->i_ino, dentry, symname); | |
531b1094 | 1274 | |
c2837de7 | 1275 | return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); |
531b1094 LI |
1276 | } |
1277 | ||
b46c267e AV |
1278 | #define U32_MAX_DIGITS 10 |
1279 | ||
531b1094 LI |
1280 | /** |
1281 | * v9fs_vfs_link - create a hardlink | |
1282 | * @old_dentry: dentry for file to link to | |
1283 | * @dir: inode destination for new link | |
1284 | * @dentry: dentry for link | |
1285 | * | |
1286 | */ | |
1287 | ||
531b1094 LI |
1288 | static int |
1289 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1290 | struct dentry *dentry) | |
1291 | { | |
1292 | int retval; | |
b46c267e | 1293 | char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ |
d28c61f0 | 1294 | struct p9_fid *oldfid; |
531b1094 | 1295 | |
4b8e9923 AV |
1296 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", |
1297 | dir->i_ino, dentry, old_dentry); | |
531b1094 | 1298 | |
da977b2c | 1299 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1300 | if (IS_ERR(oldfid)) |
da977b2c | 1301 | return PTR_ERR(oldfid); |
531b1094 | 1302 | |
16cce6d2 | 1303 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1304 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
c06c066a | 1305 | if (!retval) { |
2b0143b5 | 1306 | v9fs_refresh_inode(oldfid, d_inode(old_dentry)); |
d28c61f0 | 1307 | v9fs_invalidate_inode_attr(dir); |
c06c066a | 1308 | } |
bd238fb4 | 1309 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1310 | return retval; |
1311 | } | |
1312 | ||
1313 | /** | |
1314 | * v9fs_vfs_mknod - create a special file | |
1315 | * @dir: inode destination for new link | |
1316 | * @dentry: dentry for file | |
1317 | * @mode: mode for creation | |
ee443996 | 1318 | * @rdev: device associated with special file |
2bad8471 EVH |
1319 | * |
1320 | */ | |
1321 | ||
1322 | static int | |
1a67aafb | 1323 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) |
2bad8471 | 1324 | { |
c2837de7 | 1325 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
531b1094 | 1326 | int retval; |
b46c267e | 1327 | char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; |
c2837de7 | 1328 | u32 perm; |
2bad8471 | 1329 | |
4b8e9923 AV |
1330 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", |
1331 | dir->i_ino, dentry, mode, | |
5d385153 | 1332 | MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1333 | |
2bad8471 EVH |
1334 | /* build extension */ |
1335 | if (S_ISBLK(mode)) | |
531b1094 | 1336 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1337 | else if (S_ISCHR(mode)) |
531b1094 | 1338 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
b46c267e | 1339 | else |
75cc5c9b | 1340 | *name = 0; |
2bad8471 | 1341 | |
c2837de7 AV |
1342 | perm = unixmode2p9mode(v9ses, mode); |
1343 | retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); | |
2bad8471 EVH |
1344 | |
1345 | return retval; | |
1346 | } | |
1347 | ||
b3cbea03 AK |
1348 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
1349 | { | |
45089142 AK |
1350 | int umode; |
1351 | dev_t rdev; | |
b3cbea03 AK |
1352 | struct p9_wstat *st; |
1353 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 1354 | unsigned int flags; |
b3cbea03 AK |
1355 | |
1356 | v9ses = v9fs_inode2v9ses(inode); | |
1357 | st = p9_client_stat(fid); | |
1358 | if (IS_ERR(st)) | |
1359 | return PTR_ERR(st); | |
45089142 AK |
1360 | /* |
1361 | * Don't update inode if the file type is different | |
1362 | */ | |
1363 | umode = p9mode2unixmode(v9ses, st, &rdev); | |
1364 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) | |
1365 | goto out; | |
b3cbea03 | 1366 | |
b3cbea03 AK |
1367 | /* |
1368 | * We don't want to refresh inode->i_size, | |
1369 | * because we may have cached data | |
1370 | */ | |
5e3cc1ee HT |
1371 | flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? |
1372 | V9FS_STAT2INODE_KEEP_ISIZE : 0; | |
1373 | v9fs_stat2inode(st, inode, inode->i_sb, flags); | |
45089142 | 1374 | out: |
b3cbea03 AK |
1375 | p9stat_free(st); |
1376 | kfree(st); | |
1377 | return 0; | |
1378 | } | |
1379 | ||
9b6533c9 SK |
1380 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1381 | .create = v9fs_vfs_create, | |
1382 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1383 | .atomic_open = v9fs_vfs_atomic_open, |
9b6533c9 | 1384 | .symlink = v9fs_vfs_symlink, |
50cc42ff | 1385 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1386 | .unlink = v9fs_vfs_unlink, |
1387 | .mkdir = v9fs_vfs_mkdir, | |
1388 | .rmdir = v9fs_vfs_rmdir, | |
1d76e313 | 1389 | .mknod = v9fs_vfs_mknod, |
9b6533c9 SK |
1390 | .rename = v9fs_vfs_rename, |
1391 | .getattr = v9fs_vfs_getattr, | |
1392 | .setattr = v9fs_vfs_setattr, | |
1393 | }; | |
1394 | ||
754661f1 | 1395 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1396 | .create = v9fs_vfs_create, |
1397 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1398 | .atomic_open = v9fs_vfs_atomic_open, |
b501611a EVH |
1399 | .unlink = v9fs_vfs_unlink, |
1400 | .mkdir = v9fs_vfs_mkdir, | |
1401 | .rmdir = v9fs_vfs_rmdir, | |
1402 | .mknod = v9fs_vfs_mknod, | |
1403 | .rename = v9fs_vfs_rename, | |
1404 | .getattr = v9fs_vfs_getattr, | |
1405 | .setattr = v9fs_vfs_setattr, | |
1406 | }; | |
1407 | ||
754661f1 | 1408 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1409 | .getattr = v9fs_vfs_getattr, |
1410 | .setattr = v9fs_vfs_setattr, | |
1411 | }; | |
1412 | ||
754661f1 | 1413 | static const struct inode_operations v9fs_symlink_inode_operations = { |
6b255391 | 1414 | .get_link = v9fs_vfs_get_link, |
2bad8471 EVH |
1415 | .getattr = v9fs_vfs_getattr, |
1416 | .setattr = v9fs_vfs_setattr, | |
1417 | }; | |
9b6533c9 | 1418 |