Commit | Line | Data |
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1f327613 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2bad8471 | 2 | /* |
73c592b9 | 3 | * This file contains vfs inode ops for the 9P2000 protocol. |
2bad8471 EVH |
4 | * |
5 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
6 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
2bad8471 EVH |
7 | */ |
8 | ||
5d385153 JP |
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
10 | ||
2bad8471 EVH |
11 | #include <linux/module.h> |
12 | #include <linux/errno.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/file.h> | |
15 | #include <linux/pagemap.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/string.h> | |
2bad8471 EVH |
18 | #include <linux/inet.h> |
19 | #include <linux/namei.h> | |
20 | #include <linux/idr.h> | |
e8edc6e0 | 21 | #include <linux/sched.h> |
5a0e3ad6 | 22 | #include <linux/slab.h> |
ebf46264 | 23 | #include <linux/xattr.h> |
85ff872d | 24 | #include <linux/posix_acl.h> |
bd238fb4 LI |
25 | #include <net/9p/9p.h> |
26 | #include <net/9p/client.h> | |
2bad8471 | 27 | |
2bad8471 | 28 | #include "v9fs.h" |
2bad8471 | 29 | #include "v9fs_vfs.h" |
2bad8471 | 30 | #include "fid.h" |
60e78d2c | 31 | #include "cache.h" |
ebf46264 | 32 | #include "xattr.h" |
85ff872d | 33 | #include "acl.h" |
2bad8471 | 34 | |
754661f1 | 35 | static const struct inode_operations v9fs_dir_inode_operations; |
9b6533c9 | 36 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
754661f1 AV |
37 | static const struct inode_operations v9fs_file_inode_operations; |
38 | static const struct inode_operations v9fs_symlink_inode_operations; | |
f5fc6145 | 39 | |
2bad8471 EVH |
40 | /** |
41 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
42 | * @v9ses: v9fs session information | |
43 | * @mode: mode to convert | |
44 | * | |
45 | */ | |
46 | ||
3eda0de6 | 47 | static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) |
2bad8471 EVH |
48 | { |
49 | int res; | |
50 | res = mode & 0777; | |
51 | if (S_ISDIR(mode)) | |
bd238fb4 | 52 | res |= P9_DMDIR; |
dd6102fb | 53 | if (v9fs_proto_dotu(v9ses)) { |
2bad8471 EVH |
54 | if (v9ses->nodev == 0) { |
55 | if (S_ISSOCK(mode)) | |
bd238fb4 | 56 | res |= P9_DMSOCKET; |
2bad8471 | 57 | if (S_ISFIFO(mode)) |
bd238fb4 | 58 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 59 | if (S_ISBLK(mode)) |
bd238fb4 | 60 | res |= P9_DMDEVICE; |
2bad8471 | 61 | if (S_ISCHR(mode)) |
bd238fb4 | 62 | res |= P9_DMDEVICE; |
2bad8471 EVH |
63 | } |
64 | ||
65 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 66 | res |= P9_DMSETUID; |
2bad8471 | 67 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 68 | res |= P9_DMSETGID; |
d199d652 AL |
69 | if ((mode & S_ISVTX) == S_ISVTX) |
70 | res |= P9_DMSETVTX; | |
2bad8471 | 71 | } |
2bad8471 EVH |
72 | return res; |
73 | } | |
74 | ||
df345c67 AK |
75 | /** |
76 | * p9mode2perm- convert plan9 mode bits to unix permission bits | |
77 | * @v9ses: v9fs session information | |
78 | * @stat: p9_wstat from which mode need to be derived | |
79 | * | |
80 | */ | |
81 | static int p9mode2perm(struct v9fs_session_info *v9ses, | |
82 | struct p9_wstat *stat) | |
83 | { | |
84 | int res; | |
85 | int mode = stat->mode; | |
86 | ||
87 | res = mode & S_IALLUGO; | |
88 | if (v9fs_proto_dotu(v9ses)) { | |
89 | if ((mode & P9_DMSETUID) == P9_DMSETUID) | |
90 | res |= S_ISUID; | |
91 | ||
92 | if ((mode & P9_DMSETGID) == P9_DMSETGID) | |
93 | res |= S_ISGID; | |
94 | ||
95 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
96 | res |= S_ISVTX; | |
97 | } | |
98 | return res; | |
99 | } | |
100 | ||
2bad8471 EVH |
101 | /** |
102 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
103 | * @v9ses: v9fs session information | |
45089142 AK |
104 | * @stat: p9_wstat from which mode need to be derived |
105 | * @rdev: major number, minor number in case of device files. | |
2bad8471 EVH |
106 | * |
107 | */ | |
3eda0de6 AV |
108 | static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, |
109 | struct p9_wstat *stat, dev_t *rdev) | |
2bad8471 | 110 | { |
05f975cd | 111 | int res, r; |
3eda0de6 | 112 | u32 mode = stat->mode; |
2bad8471 | 113 | |
45089142 | 114 | *rdev = 0; |
df345c67 | 115 | res = p9mode2perm(v9ses, stat); |
2bad8471 | 116 | |
bd238fb4 | 117 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 118 | res |= S_IFDIR; |
dd6102fb | 119 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
2bad8471 | 120 | res |= S_IFLNK; |
dd6102fb | 121 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
122 | && (v9ses->nodev == 0)) |
123 | res |= S_IFSOCK; | |
dd6102fb | 124 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
125 | && (v9ses->nodev == 0)) |
126 | res |= S_IFIFO; | |
dd6102fb | 127 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
45089142 | 128 | && (v9ses->nodev == 0)) { |
05f975cd | 129 | char type = 0; |
45089142 AK |
130 | int major = -1, minor = -1; |
131 | ||
05f975cd DM |
132 | r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); |
133 | if (r != 3) { | |
134 | p9_debug(P9_DEBUG_ERROR, | |
135 | "invalid device string, umode will be bogus: %s\n", | |
136 | stat->extension); | |
137 | return res; | |
138 | } | |
45089142 AK |
139 | switch (type) { |
140 | case 'c': | |
141 | res |= S_IFCHR; | |
142 | break; | |
143 | case 'b': | |
144 | res |= S_IFBLK; | |
145 | break; | |
146 | default: | |
5d385153 JP |
147 | p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", |
148 | type, stat->extension); | |
51958817 | 149 | } |
45089142 AK |
150 | *rdev = MKDEV(major, minor); |
151 | } else | |
2bad8471 EVH |
152 | res |= S_IFREG; |
153 | ||
2bad8471 EVH |
154 | return res; |
155 | } | |
156 | ||
ee443996 EVH |
157 | /** |
158 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
159 | * @uflags: flags to convert | |
2e4bef41 | 160 | * @extended: if .u extensions are active |
ee443996 EVH |
161 | */ |
162 | ||
2e4bef41 | 163 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
164 | { |
165 | int ret; | |
166 | ||
167 | ret = 0; | |
168 | switch (uflags&3) { | |
169 | default: | |
170 | case O_RDONLY: | |
bd238fb4 | 171 | ret = P9_OREAD; |
6a3124a3 LI |
172 | break; |
173 | ||
174 | case O_WRONLY: | |
bd238fb4 | 175 | ret = P9_OWRITE; |
6a3124a3 LI |
176 | break; |
177 | ||
178 | case O_RDWR: | |
bd238fb4 | 179 | ret = P9_ORDWR; |
6a3124a3 LI |
180 | break; |
181 | } | |
182 | ||
2e4bef41 EVH |
183 | if (extended) { |
184 | if (uflags & O_EXCL) | |
185 | ret |= P9_OEXCL; | |
186 | ||
187 | if (uflags & O_APPEND) | |
188 | ret |= P9_OAPPEND; | |
189 | } | |
6a3124a3 LI |
190 | |
191 | return ret; | |
192 | } | |
193 | ||
2bad8471 | 194 | /** |
531b1094 | 195 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
531b1094 | 196 | * @wstat: structure to initialize |
2bad8471 EVH |
197 | * |
198 | */ | |
199 | ||
7a4439c4 | 200 | void |
bd238fb4 | 201 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 202 | { |
531b1094 LI |
203 | wstat->type = ~0; |
204 | wstat->dev = ~0; | |
205 | wstat->qid.type = ~0; | |
206 | wstat->qid.version = ~0; | |
207 | *((long long *)&wstat->qid.path) = ~0; | |
208 | wstat->mode = ~0; | |
209 | wstat->atime = ~0; | |
210 | wstat->mtime = ~0; | |
211 | wstat->length = ~0; | |
212 | wstat->name = NULL; | |
213 | wstat->uid = NULL; | |
214 | wstat->gid = NULL; | |
215 | wstat->muid = NULL; | |
447c5094 EB |
216 | wstat->n_uid = INVALID_UID; |
217 | wstat->n_gid = INVALID_GID; | |
218 | wstat->n_muid = INVALID_UID; | |
531b1094 | 219 | wstat->extension = NULL; |
2bad8471 EVH |
220 | } |
221 | ||
60e78d2c AK |
222 | /** |
223 | * v9fs_alloc_inode - helper function to allocate an inode | |
bc868036 | 224 | * @sb: The superblock to allocate the inode from |
60e78d2c | 225 | */ |
60e78d2c AK |
226 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
227 | { | |
a78ce05d | 228 | struct v9fs_inode *v9inode; |
2ed0b757 | 229 | v9inode = kmem_cache_alloc(v9fs_inode_cache, GFP_KERNEL); |
a78ce05d | 230 | if (!v9inode) |
60e78d2c | 231 | return NULL; |
a78ce05d AK |
232 | #ifdef CONFIG_9P_FSCACHE |
233 | v9inode->fscache = NULL; | |
8f5fed1e | 234 | mutex_init(&v9inode->fscache_lock); |
a78ce05d | 235 | #endif |
6b39f6d2 | 236 | v9inode->writeback_fid = NULL; |
b3cbea03 | 237 | v9inode->cache_validity = 0; |
5a7e0a8c | 238 | mutex_init(&v9inode->v_mutex); |
a78ce05d | 239 | return &v9inode->vfs_inode; |
60e78d2c AK |
240 | } |
241 | ||
242 | /** | |
5e8a0770 | 243 | * v9fs_free_inode - destroy an inode |
bc868036 | 244 | * @inode: The inode to be freed |
60e78d2c AK |
245 | */ |
246 | ||
5e8a0770 | 247 | void v9fs_free_inode(struct inode *inode) |
60e78d2c | 248 | { |
a78ce05d | 249 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
60e78d2c | 250 | } |
fa0d7e3d | 251 | |
5ffc0cb3 | 252 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
3eda0de6 | 253 | struct inode *inode, umode_t mode, dev_t rdev) |
2bad8471 | 254 | { |
5ffc0cb3 | 255 | int err = 0; |
2bb54115 | 256 | |
21cb47be | 257 | inode_init_owner(&init_user_ns,inode, NULL, mode); |
2bb54115 | 258 | inode->i_blocks = 0; |
45089142 | 259 | inode->i_rdev = rdev; |
078cd827 | 260 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
2bb54115 | 261 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
987a6485 | 262 | inode->i_private = NULL; |
2bb54115 AK |
263 | |
264 | switch (mode & S_IFMT) { | |
265 | case S_IFIFO: | |
266 | case S_IFBLK: | |
267 | case S_IFCHR: | |
268 | case S_IFSOCK: | |
4b43516a MK |
269 | if (v9fs_proto_dotl(v9ses)) { |
270 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
4b43516a MK |
271 | } else if (v9fs_proto_dotu(v9ses)) { |
272 | inode->i_op = &v9fs_file_inode_operations; | |
4b43516a | 273 | } else { |
5d385153 JP |
274 | p9_debug(P9_DEBUG_ERROR, |
275 | "special files without extended mode\n"); | |
2bb54115 AK |
276 | err = -EINVAL; |
277 | goto error; | |
2bad8471 | 278 | } |
2bb54115 AK |
279 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
280 | break; | |
281 | case S_IFREG: | |
9b6533c9 SK |
282 | if (v9fs_proto_dotl(v9ses)) { |
283 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
fb89b45c DM |
284 | if (v9ses->cache == CACHE_LOOSE || |
285 | v9ses->cache == CACHE_FSCACHE) | |
29236f4e AK |
286 | inode->i_fop = |
287 | &v9fs_cached_file_operations_dotl; | |
fb89b45c DM |
288 | else if (v9ses->cache == CACHE_MMAP) |
289 | inode->i_fop = &v9fs_mmap_file_operations_dotl; | |
29236f4e AK |
290 | else |
291 | inode->i_fop = &v9fs_file_operations_dotl; | |
9b6533c9 SK |
292 | } else { |
293 | inode->i_op = &v9fs_file_inode_operations; | |
fb89b45c DM |
294 | if (v9ses->cache == CACHE_LOOSE || |
295 | v9ses->cache == CACHE_FSCACHE) | |
296 | inode->i_fop = | |
297 | &v9fs_cached_file_operations; | |
298 | else if (v9ses->cache == CACHE_MMAP) | |
299 | inode->i_fop = &v9fs_mmap_file_operations; | |
29236f4e AK |
300 | else |
301 | inode->i_fop = &v9fs_file_operations; | |
9b6533c9 SK |
302 | } |
303 | ||
2bb54115 AK |
304 | break; |
305 | case S_IFLNK: | |
9b6533c9 | 306 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
5d385153 JP |
307 | p9_debug(P9_DEBUG_ERROR, |
308 | "extended modes used with legacy protocol\n"); | |
2bb54115 AK |
309 | err = -EINVAL; |
310 | goto error; | |
311 | } | |
9b6533c9 SK |
312 | |
313 | if (v9fs_proto_dotl(v9ses)) | |
314 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
315 | else | |
316 | inode->i_op = &v9fs_symlink_inode_operations; | |
317 | ||
2bb54115 AK |
318 | break; |
319 | case S_IFDIR: | |
320 | inc_nlink(inode); | |
9b6533c9 SK |
321 | if (v9fs_proto_dotl(v9ses)) |
322 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
323 | else if (v9fs_proto_dotu(v9ses)) | |
324 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
325 | else |
326 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
327 | |
328 | if (v9fs_proto_dotl(v9ses)) | |
329 | inode->i_fop = &v9fs_dir_operations_dotl; | |
330 | else | |
331 | inode->i_fop = &v9fs_dir_operations; | |
332 | ||
2bb54115 AK |
333 | break; |
334 | default: | |
609eac1c | 335 | p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", |
5d385153 | 336 | mode, mode & S_IFMT); |
2bb54115 AK |
337 | err = -EINVAL; |
338 | goto error; | |
2bad8471 | 339 | } |
5ffc0cb3 AK |
340 | error: |
341 | return err; | |
2bb54115 | 342 | |
5ffc0cb3 | 343 | } |
2bb54115 | 344 | |
5ffc0cb3 AK |
345 | /** |
346 | * v9fs_get_inode - helper function to setup an inode | |
347 | * @sb: superblock | |
348 | * @mode: mode to setup inode with | |
bc868036 | 349 | * @rdev: The device numbers to set |
5ffc0cb3 AK |
350 | */ |
351 | ||
3eda0de6 | 352 | struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) |
5ffc0cb3 AK |
353 | { |
354 | int err; | |
355 | struct inode *inode; | |
356 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
357 | ||
609eac1c | 358 | p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); |
5ffc0cb3 AK |
359 | |
360 | inode = new_inode(sb); | |
361 | if (!inode) { | |
5d385153 JP |
362 | pr_warn("%s (%d): Problem allocating inode\n", |
363 | __func__, task_pid_nr(current)); | |
5ffc0cb3 AK |
364 | return ERR_PTR(-ENOMEM); |
365 | } | |
45089142 | 366 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
5ffc0cb3 AK |
367 | if (err) { |
368 | iput(inode); | |
369 | return ERR_PTR(err); | |
370 | } | |
371 | return inode; | |
2bad8471 EVH |
372 | } |
373 | ||
60e78d2c | 374 | /** |
bc868036 | 375 | * v9fs_evict_inode - Remove an inode from the inode cache |
60e78d2c AK |
376 | * @inode: inode to release |
377 | * | |
378 | */ | |
b57922d9 | 379 | void v9fs_evict_inode(struct inode *inode) |
60e78d2c | 380 | { |
6b39f6d2 AK |
381 | struct v9fs_inode *v9inode = V9FS_I(inode); |
382 | ||
4ad78628 | 383 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 384 | clear_inode(inode); |
4ad78628 | 385 | filemap_fdatawrite(&inode->i_data); |
60e78d2c | 386 | |
60e78d2c | 387 | v9fs_cache_inode_put_cookie(inode); |
6b39f6d2 AK |
388 | /* clunk the fid stashed in writeback_fid */ |
389 | if (v9inode->writeback_fid) { | |
390 | p9_client_clunk(v9inode->writeback_fid); | |
391 | v9inode->writeback_fid = NULL; | |
3cf387d7 | 392 | } |
60e78d2c AK |
393 | } |
394 | ||
fd2421f5 AK |
395 | static int v9fs_test_inode(struct inode *inode, void *data) |
396 | { | |
397 | int umode; | |
45089142 | 398 | dev_t rdev; |
fd2421f5 AK |
399 | struct v9fs_inode *v9inode = V9FS_I(inode); |
400 | struct p9_wstat *st = (struct p9_wstat *)data; | |
401 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); | |
402 | ||
45089142 | 403 | umode = p9mode2unixmode(v9ses, st, &rdev); |
fd2421f5 | 404 | /* don't match inode of different type */ |
6e3e2c43 | 405 | if (inode_wrong_type(inode, umode)) |
fd2421f5 AK |
406 | return 0; |
407 | ||
408 | /* compare qid details */ | |
409 | if (memcmp(&v9inode->qid.version, | |
410 | &st->qid.version, sizeof(v9inode->qid.version))) | |
411 | return 0; | |
412 | ||
413 | if (v9inode->qid.type != st->qid.type) | |
414 | return 0; | |
8ee03163 TT |
415 | |
416 | if (v9inode->qid.path != st->qid.path) | |
417 | return 0; | |
fd2421f5 AK |
418 | return 1; |
419 | } | |
420 | ||
ed80fcfa AK |
421 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
422 | { | |
423 | return 0; | |
424 | } | |
425 | ||
fd2421f5 AK |
426 | static int v9fs_set_inode(struct inode *inode, void *data) |
427 | { | |
428 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
429 | struct p9_wstat *st = (struct p9_wstat *)data; | |
430 | ||
431 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
432 | return 0; | |
433 | } | |
434 | ||
5ffc0cb3 AK |
435 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
436 | struct p9_qid *qid, | |
ed80fcfa AK |
437 | struct p9_wstat *st, |
438 | int new) | |
6a3124a3 | 439 | { |
45089142 | 440 | dev_t rdev; |
3eda0de6 AV |
441 | int retval; |
442 | umode_t umode; | |
5ffc0cb3 AK |
443 | unsigned long i_ino; |
444 | struct inode *inode; | |
445 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
ed80fcfa AK |
446 | int (*test)(struct inode *, void *); |
447 | ||
448 | if (new) | |
449 | test = v9fs_test_new_inode; | |
450 | else | |
451 | test = v9fs_test_inode; | |
2bad8471 | 452 | |
5ffc0cb3 | 453 | i_ino = v9fs_qid2ino(qid); |
ed80fcfa | 454 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); |
5ffc0cb3 AK |
455 | if (!inode) |
456 | return ERR_PTR(-ENOMEM); | |
457 | if (!(inode->i_state & I_NEW)) | |
458 | return inode; | |
459 | /* | |
460 | * initialize the inode with the stat info | |
461 | * FIXME!! we may need support for stale inodes | |
462 | * later. | |
463 | */ | |
fd2421f5 | 464 | inode->i_ino = i_ino; |
45089142 AK |
465 | umode = p9mode2unixmode(v9ses, st, &rdev); |
466 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); | |
5ffc0cb3 | 467 | if (retval) |
6a3124a3 | 468 | goto error; |
60e78d2c | 469 | |
5e3cc1ee | 470 | v9fs_stat2inode(st, inode, sb, 0); |
5ffc0cb3 | 471 | v9fs_cache_inode_get_cookie(inode); |
5ffc0cb3 AK |
472 | unlock_new_inode(inode); |
473 | return inode; | |
6a3124a3 | 474 | error: |
0a73d0a2 | 475 | iget_failed(inode); |
5ffc0cb3 AK |
476 | return ERR_PTR(retval); |
477 | ||
478 | } | |
479 | ||
480 | struct inode * | |
a78ce05d | 481 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 482 | struct super_block *sb, int new) |
5ffc0cb3 AK |
483 | { |
484 | struct p9_wstat *st; | |
485 | struct inode *inode = NULL; | |
486 | ||
487 | st = p9_client_stat(fid); | |
488 | if (IS_ERR(st)) | |
489 | return ERR_CAST(st); | |
490 | ||
ed80fcfa | 491 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
02bc3567 | 492 | p9stat_free(st); |
bd238fb4 | 493 | kfree(st); |
5ffc0cb3 | 494 | return inode; |
2bad8471 EVH |
495 | } |
496 | ||
f88657ce AK |
497 | /** |
498 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to | |
499 | * plan 9 AT flag. | |
500 | * @flags: flags to convert | |
501 | */ | |
502 | static int v9fs_at_to_dotl_flags(int flags) | |
503 | { | |
504 | int rflags = 0; | |
505 | if (flags & AT_REMOVEDIR) | |
506 | rflags |= P9_DOTL_AT_REMOVEDIR; | |
507 | return rflags; | |
508 | } | |
509 | ||
ac89b2ef EG |
510 | /** |
511 | * v9fs_dec_count - helper functon to drop i_nlink. | |
512 | * | |
513 | * If a directory had nlink <= 2 (including . and ..), then we should not drop | |
514 | * the link count, which indicates the underlying exported fs doesn't maintain | |
515 | * nlink accurately. e.g. | |
516 | * - overlayfs sets nlink to 1 for merged dir | |
517 | * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more | |
518 | * than EXT4_LINK_MAX (65000) links. | |
519 | * | |
520 | * @inode: inode whose nlink is being dropped | |
521 | */ | |
522 | static void v9fs_dec_count(struct inode *inode) | |
523 | { | |
524 | if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) | |
525 | drop_nlink(inode); | |
526 | } | |
527 | ||
2bad8471 EVH |
528 | /** |
529 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 | 530 | * @dir: directory inode that is being deleted |
48e370ff | 531 | * @dentry: dentry that is being deleted |
fd2916bd | 532 | * @flags: removing a directory |
2bad8471 EVH |
533 | * |
534 | */ | |
535 | ||
48e370ff | 536 | static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) |
2bad8471 | 537 | { |
48e370ff AK |
538 | struct inode *inode; |
539 | int retval = -EOPNOTSUPP; | |
540 | struct p9_fid *v9fid, *dfid; | |
541 | struct v9fs_session_info *v9ses; | |
2bad8471 | 542 | |
5d385153 JP |
543 | p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", |
544 | dir, dentry, flags); | |
2bad8471 | 545 | |
48e370ff | 546 | v9ses = v9fs_inode2v9ses(dir); |
2b0143b5 | 547 | inode = d_inode(dentry); |
77d5a6b7 | 548 | dfid = v9fs_parent_fid(dentry); |
48e370ff AK |
549 | if (IS_ERR(dfid)) { |
550 | retval = PTR_ERR(dfid); | |
5d385153 | 551 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); |
48e370ff AK |
552 | return retval; |
553 | } | |
554 | if (v9fs_proto_dotl(v9ses)) | |
f88657ce AK |
555 | retval = p9_client_unlinkat(dfid, dentry->d_name.name, |
556 | v9fs_at_to_dotl_flags(flags)); | |
6636b6dc | 557 | p9_client_clunk(dfid); |
48e370ff AK |
558 | if (retval == -EOPNOTSUPP) { |
559 | /* Try the one based on path */ | |
560 | v9fid = v9fs_fid_clone(dentry); | |
561 | if (IS_ERR(v9fid)) | |
562 | return PTR_ERR(v9fid); | |
563 | retval = p9_client_remove(v9fid); | |
564 | } | |
b271ec47 AK |
565 | if (!retval) { |
566 | /* | |
567 | * directories on unlink should have zero | |
568 | * link count | |
569 | */ | |
48e370ff AK |
570 | if (flags & AT_REMOVEDIR) { |
571 | clear_nlink(inode); | |
ac89b2ef | 572 | v9fs_dec_count(dir); |
b271ec47 | 573 | } else |
ac89b2ef | 574 | v9fs_dec_count(inode); |
d28c61f0 | 575 | |
48e370ff | 576 | v9fs_invalidate_inode_attr(inode); |
d28c61f0 | 577 | v9fs_invalidate_inode_attr(dir); |
154372e6 EVH |
578 | |
579 | /* invalidate all fids associated with dentry */ | |
580 | /* NOTE: This will not include open fids */ | |
581 | dentry->d_op->d_release(dentry); | |
b271ec47 | 582 | } |
d994f405 | 583 | return retval; |
2bad8471 EVH |
584 | } |
585 | ||
586 | /** | |
bd238fb4 | 587 | * v9fs_create - Create a file |
ee443996 EVH |
588 | * @v9ses: session information |
589 | * @dir: directory that dentry is being created in | |
bd238fb4 | 590 | * @dentry: dentry that is being created |
0e15597e | 591 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
592 | * @perm: create permissions |
593 | * @mode: open mode | |
2bad8471 EVH |
594 | * |
595 | */ | |
bd238fb4 LI |
596 | static struct p9_fid * |
597 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
598 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 599 | { |
6a3124a3 | 600 | int err; |
7880b43b | 601 | const unsigned char *name; |
6636b6dc | 602 | struct p9_fid *dfid, *ofid = NULL, *fid = NULL; |
6a3124a3 | 603 | struct inode *inode; |
6a3124a3 | 604 | |
4b8e9923 | 605 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
51a87c55 | 606 | |
bd238fb4 | 607 | err = 0; |
7880b43b | 608 | name = dentry->d_name.name; |
77d5a6b7 | 609 | dfid = v9fs_parent_fid(dentry); |
ba17674f | 610 | if (IS_ERR(dfid)) { |
da977b2c | 611 | err = PTR_ERR(dfid); |
5d385153 | 612 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
6d27e64d | 613 | return ERR_PTR(err); |
da977b2c | 614 | } |
6a3124a3 | 615 | |
bd238fb4 | 616 | /* clone a fid to use for creation */ |
7d50a29f | 617 | ofid = clone_fid(dfid); |
bd238fb4 LI |
618 | if (IS_ERR(ofid)) { |
619 | err = PTR_ERR(ofid); | |
5d385153 | 620 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
6636b6dc | 621 | p9_client_clunk(dfid); |
6d27e64d | 622 | return ERR_PTR(err); |
bd238fb4 | 623 | } |
6a3124a3 | 624 | |
bd238fb4 | 625 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 | 626 | if (err < 0) { |
5d385153 | 627 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
6636b6dc | 628 | p9_client_clunk(dfid); |
6a3124a3 | 629 | goto error; |
6d27e64d | 630 | } |
6a3124a3 | 631 | |
b6054793 AK |
632 | if (!(perm & P9_DMLINK)) { |
633 | /* now walk from the parent so we can get unopened fid */ | |
634 | fid = p9_client_walk(dfid, 1, &name, 1); | |
635 | if (IS_ERR(fid)) { | |
636 | err = PTR_ERR(fid); | |
637 | p9_debug(P9_DEBUG_VFS, | |
638 | "p9_client_walk failed %d\n", err); | |
639 | fid = NULL; | |
6636b6dc | 640 | p9_client_clunk(dfid); |
b6054793 AK |
641 | goto error; |
642 | } | |
643 | /* | |
644 | * instantiate inode and assign the unopened fid to the dentry | |
645 | */ | |
646 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
647 | if (IS_ERR(inode)) { | |
648 | err = PTR_ERR(inode); | |
649 | p9_debug(P9_DEBUG_VFS, | |
650 | "inode creation failed %d\n", err); | |
6636b6dc | 651 | p9_client_clunk(dfid); |
b6054793 AK |
652 | goto error; |
653 | } | |
2ea03e1d | 654 | v9fs_fid_add(dentry, fid); |
b6054793 | 655 | d_instantiate(dentry, inode); |
6a3124a3 | 656 | } |
6636b6dc | 657 | p9_client_clunk(dfid); |
bd238fb4 | 658 | return ofid; |
bd238fb4 | 659 | error: |
bd238fb4 LI |
660 | if (ofid) |
661 | p9_client_clunk(ofid); | |
662 | ||
663 | if (fid) | |
664 | p9_client_clunk(fid); | |
665 | ||
666 | return ERR_PTR(err); | |
667 | } | |
668 | ||
669 | /** | |
e43ae79c | 670 | * v9fs_vfs_create - VFS hook to create a regular file |
bc868036 DH |
671 | * @mnt_userns: The user namespace of the mount |
672 | * @dir: The parent directory | |
673 | * @dentry: The name of file to be created | |
674 | * @mode: The UNIX file mode to set | |
675 | * @excl: True if the file must not yet exist | |
e43ae79c MS |
676 | * |
677 | * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called | |
678 | * for mknod(2). | |
679 | * | |
bd238fb4 | 680 | */ |
6a3124a3 | 681 | |
bd238fb4 | 682 | static int |
549c7297 CB |
683 | v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir, |
684 | struct dentry *dentry, umode_t mode, bool excl) | |
bd238fb4 | 685 | { |
e43ae79c MS |
686 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
687 | u32 perm = unixmode2p9mode(v9ses, mode); | |
688 | struct p9_fid *fid; | |
bd238fb4 | 689 | |
e43ae79c MS |
690 | /* P9_OEXCL? */ |
691 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); | |
692 | if (IS_ERR(fid)) | |
693 | return PTR_ERR(fid); | |
bd238fb4 | 694 | |
d28c61f0 | 695 | v9fs_invalidate_inode_attr(dir); |
e43ae79c | 696 | p9_client_clunk(fid); |
6a3124a3 LI |
697 | |
698 | return 0; | |
2bad8471 EVH |
699 | } |
700 | ||
701 | /** | |
702 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
bc868036 | 703 | * @mnt_userns: The user namespace of the mount |
ee443996 | 704 | * @dir: inode that is being unlinked |
2bad8471 EVH |
705 | * @dentry: dentry that is being unlinked |
706 | * @mode: mode for new directory | |
707 | * | |
708 | */ | |
709 | ||
549c7297 CB |
710 | static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, |
711 | struct dentry *dentry, umode_t mode) | |
2bad8471 | 712 | { |
6a3124a3 | 713 | int err; |
bd238fb4 | 714 | u32 perm; |
bd238fb4 | 715 | struct p9_fid *fid; |
d28c61f0 | 716 | struct v9fs_session_info *v9ses; |
6a3124a3 | 717 | |
4b8e9923 | 718 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
bd238fb4 | 719 | err = 0; |
6a3124a3 | 720 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 721 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
722 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
723 | if (IS_ERR(fid)) { | |
724 | err = PTR_ERR(fid); | |
725 | fid = NULL; | |
d28c61f0 | 726 | } else { |
b271ec47 | 727 | inc_nlink(dir); |
d28c61f0 AK |
728 | v9fs_invalidate_inode_attr(dir); |
729 | } | |
6a3124a3 | 730 | |
bd238fb4 LI |
731 | if (fid) |
732 | p9_client_clunk(fid); | |
6a3124a3 | 733 | |
6a3124a3 | 734 | return err; |
2bad8471 EVH |
735 | } |
736 | ||
737 | /** | |
738 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
739 | * @dir: inode that is being walked from | |
740 | * @dentry: dentry that is being walked to? | |
fd2916bd | 741 | * @flags: lookup flags (unused) |
2bad8471 EVH |
742 | * |
743 | */ | |
744 | ||
53c06f4e | 745 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 746 | unsigned int flags) |
2bad8471 | 747 | { |
73f50717 | 748 | struct dentry *res; |
2bad8471 | 749 | struct v9fs_session_info *v9ses; |
bd238fb4 | 750 | struct p9_fid *dfid, *fid; |
2bad8471 | 751 | struct inode *inode; |
7880b43b | 752 | const unsigned char *name; |
2bad8471 | 753 | |
4b8e9923 AV |
754 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", |
755 | dir, dentry, dentry, flags); | |
2bad8471 | 756 | |
11e9b49b SK |
757 | if (dentry->d_name.len > NAME_MAX) |
758 | return ERR_PTR(-ENAMETOOLONG); | |
759 | ||
2bad8471 | 760 | v9ses = v9fs_inode2v9ses(dir); |
a534c8d1 | 761 | /* We can walk d_parent because we hold the dir->i_mutex */ |
77d5a6b7 | 762 | dfid = v9fs_parent_fid(dentry); |
bd238fb4 | 763 | if (IS_ERR(dfid)) |
e231c2ee | 764 | return ERR_CAST(dfid); |
bd238fb4 | 765 | |
73f50717 AK |
766 | /* |
767 | * Make sure we don't use a wrong inode due to parallel | |
768 | * unlink. For cached mode create calls request for new | |
769 | * inode. But with cache disabled, lookup should do this. | |
770 | */ | |
500e2ab6 AV |
771 | name = dentry->d_name.name; |
772 | fid = p9_client_walk(dfid, 1, &name, 1); | |
6636b6dc | 773 | p9_client_clunk(dfid); |
500e2ab6 AV |
774 | if (fid == ERR_PTR(-ENOENT)) |
775 | inode = NULL; | |
776 | else if (IS_ERR(fid)) | |
777 | inode = ERR_CAST(fid); | |
778 | else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) | |
73f50717 AK |
779 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
780 | else | |
781 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
73f50717 AK |
782 | /* |
783 | * If we had a rename on the server and a parallel lookup | |
784 | * for the new name, then make sure we instantiate with | |
785 | * the new name. ie look up for a/b, while on server somebody | |
786 | * moved b under k and client parallely did a lookup for | |
787 | * k/b. | |
788 | */ | |
41d28bca | 789 | res = d_splice_alias(inode, dentry); |
500e2ab6 AV |
790 | if (!IS_ERR(fid)) { |
791 | if (!res) | |
792 | v9fs_fid_add(dentry, fid); | |
793 | else if (!IS_ERR(res)) | |
794 | v9fs_fid_add(res, fid); | |
795 | else | |
796 | p9_client_clunk(fid); | |
797 | } | |
7b5be621 | 798 | return res; |
2bad8471 EVH |
799 | } |
800 | ||
d9585277 | 801 | static int |
e43ae79c | 802 | v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, |
44907d79 | 803 | struct file *file, unsigned flags, umode_t mode) |
e43ae79c MS |
804 | { |
805 | int err; | |
806 | u32 perm; | |
e43ae79c MS |
807 | struct v9fs_inode *v9inode; |
808 | struct v9fs_session_info *v9ses; | |
809 | struct p9_fid *fid, *inode_fid; | |
810 | struct dentry *res = NULL; | |
987a6485 | 811 | struct inode *inode; |
e43ae79c | 812 | |
00699ad8 | 813 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 814 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 815 | if (IS_ERR(res)) |
d9585277 | 816 | return PTR_ERR(res); |
e43ae79c MS |
817 | |
818 | if (res) | |
819 | dentry = res; | |
820 | } | |
821 | ||
822 | /* Only creates */ | |
2b0143b5 | 823 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
e45198a6 | 824 | return finish_no_open(file, res); |
e43ae79c MS |
825 | |
826 | err = 0; | |
fae74696 | 827 | |
e43ae79c MS |
828 | v9ses = v9fs_inode2v9ses(dir); |
829 | perm = unixmode2p9mode(v9ses, mode); | |
830 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
831 | v9fs_uflags2omode(flags, | |
832 | v9fs_proto_dotu(v9ses))); | |
833 | if (IS_ERR(fid)) { | |
834 | err = PTR_ERR(fid); | |
835 | fid = NULL; | |
836 | goto error; | |
837 | } | |
838 | ||
839 | v9fs_invalidate_inode_attr(dir); | |
987a6485 GK |
840 | inode = d_inode(dentry); |
841 | v9inode = V9FS_I(inode); | |
e43ae79c | 842 | mutex_lock(&v9inode->v_mutex); |
fb89b45c DM |
843 | if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && |
844 | !v9inode->writeback_fid && | |
e43ae79c MS |
845 | ((flags & O_ACCMODE) != O_RDONLY)) { |
846 | /* | |
847 | * clone a fid and add it to writeback_fid | |
848 | * we do it during open time instead of | |
849 | * page dirty time via write_begin/page_mkwrite | |
850 | * because we want write after unlink usecase | |
851 | * to work. | |
852 | */ | |
853 | inode_fid = v9fs_writeback_fid(dentry); | |
854 | if (IS_ERR(inode_fid)) { | |
855 | err = PTR_ERR(inode_fid); | |
856 | mutex_unlock(&v9inode->v_mutex); | |
857 | goto error; | |
858 | } | |
859 | v9inode->writeback_fid = (void *) inode_fid; | |
860 | } | |
861 | mutex_unlock(&v9inode->v_mutex); | |
be12af3e | 862 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 863 | if (err) |
e43ae79c | 864 | goto error; |
e43ae79c | 865 | |
30d90494 | 866 | file->private_data = fid; |
fb89b45c | 867 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
2b0143b5 | 868 | v9fs_cache_inode_set_cookie(d_inode(dentry), file); |
987a6485 | 869 | v9fs_open_fid_add(inode, fid); |
e43ae79c | 870 | |
73a09dd9 | 871 | file->f_mode |= FMODE_CREATED; |
e43ae79c MS |
872 | out: |
873 | dput(res); | |
d9585277 | 874 | return err; |
e43ae79c MS |
875 | |
876 | error: | |
877 | if (fid) | |
878 | p9_client_clunk(fid); | |
e43ae79c MS |
879 | goto out; |
880 | } | |
881 | ||
2bad8471 EVH |
882 | /** |
883 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
884 | * @i: inode that is being unlinked | |
73c592b9 | 885 | * @d: dentry that is being unlinked |
2bad8471 EVH |
886 | * |
887 | */ | |
888 | ||
53c06f4e | 889 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
2bad8471 EVH |
890 | { |
891 | return v9fs_remove(i, d, 0); | |
892 | } | |
893 | ||
894 | /** | |
895 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
896 | * @i: inode that is being unlinked | |
73c592b9 | 897 | * @d: dentry that is being unlinked |
2bad8471 EVH |
898 | * |
899 | */ | |
900 | ||
53c06f4e | 901 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
2bad8471 | 902 | { |
48e370ff | 903 | return v9fs_remove(i, d, AT_REMOVEDIR); |
2bad8471 EVH |
904 | } |
905 | ||
906 | /** | |
907 | * v9fs_vfs_rename - VFS hook to rename an inode | |
bc868036 | 908 | * @mnt_userns: The user namespace of the mount |
2bad8471 EVH |
909 | * @old_dir: old dir inode |
910 | * @old_dentry: old dentry | |
911 | * @new_dir: new dir inode | |
912 | * @new_dentry: new dentry | |
bc868036 | 913 | * @flags: RENAME_* flags |
2bad8471 EVH |
914 | * |
915 | */ | |
916 | ||
53c06f4e | 917 | int |
549c7297 CB |
918 | v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, |
919 | struct dentry *old_dentry, struct inode *new_dir, | |
920 | struct dentry *new_dentry, unsigned int flags) | |
2bad8471 | 921 | { |
d28c61f0 | 922 | int retval; |
bd238fb4 | 923 | struct inode *old_inode; |
b271ec47 | 924 | struct inode *new_inode; |
bd238fb4 | 925 | struct v9fs_session_info *v9ses; |
6636b6dc | 926 | struct p9_fid *oldfid, *dfid; |
bd238fb4 LI |
927 | struct p9_fid *olddirfid; |
928 | struct p9_fid *newdirfid; | |
929 | struct p9_wstat wstat; | |
2bad8471 | 930 | |
1cd66c93 MS |
931 | if (flags) |
932 | return -EINVAL; | |
933 | ||
5d385153 | 934 | p9_debug(P9_DEBUG_VFS, "\n"); |
bd238fb4 | 935 | retval = 0; |
2b0143b5 DH |
936 | old_inode = d_inode(old_dentry); |
937 | new_inode = d_inode(new_dentry); | |
bd238fb4 LI |
938 | v9ses = v9fs_inode2v9ses(old_inode); |
939 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 940 | if (IS_ERR(oldfid)) |
da977b2c EVH |
941 | return PTR_ERR(oldfid); |
942 | ||
6636b6dc JW |
943 | dfid = v9fs_parent_fid(old_dentry); |
944 | olddirfid = clone_fid(dfid); | |
945 | if (dfid && !IS_ERR(dfid)) | |
946 | p9_client_clunk(dfid); | |
947 | ||
ba17674f | 948 | if (IS_ERR(olddirfid)) { |
da977b2c | 949 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 950 | goto done; |
da977b2c EVH |
951 | } |
952 | ||
6636b6dc JW |
953 | dfid = v9fs_parent_fid(new_dentry); |
954 | newdirfid = clone_fid(dfid); | |
955 | p9_client_clunk(dfid); | |
956 | ||
ba17674f | 957 | if (IS_ERR(newdirfid)) { |
da977b2c | 958 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 959 | goto clunk_olddir; |
2bad8471 EVH |
960 | } |
961 | ||
a534c8d1 | 962 | down_write(&v9ses->rename_sem); |
4681dbda | 963 | if (v9fs_proto_dotl(v9ses)) { |
9e8fb38e AK |
964 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
965 | newdirfid, new_dentry->d_name.name); | |
966 | if (retval == -EOPNOTSUPP) | |
967 | retval = p9_client_rename(oldfid, newdirfid, | |
968 | new_dentry->d_name.name); | |
969 | if (retval != -EOPNOTSUPP) | |
4681dbda SK |
970 | goto clunk_newdir; |
971 | } | |
a534c8d1 AK |
972 | if (old_dentry->d_parent != new_dentry->d_parent) { |
973 | /* | |
974 | * 9P .u can only handle file rename in the same directory | |
975 | */ | |
4681dbda | 976 | |
5d385153 | 977 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
621997cd | 978 | retval = -EXDEV; |
bd238fb4 | 979 | goto clunk_newdir; |
2bad8471 | 980 | } |
531b1094 | 981 | v9fs_blank_wstat(&wstat); |
ba17674f | 982 | wstat.muid = v9ses->uname; |
7880b43b | 983 | wstat.name = new_dentry->d_name.name; |
bd238fb4 | 984 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 985 | |
bd238fb4 | 986 | clunk_newdir: |
b271ec47 AK |
987 | if (!retval) { |
988 | if (new_inode) { | |
989 | if (S_ISDIR(new_inode->i_mode)) | |
990 | clear_nlink(new_inode); | |
991 | else | |
ac89b2ef | 992 | v9fs_dec_count(new_inode); |
b271ec47 AK |
993 | } |
994 | if (S_ISDIR(old_inode->i_mode)) { | |
995 | if (!new_inode) | |
996 | inc_nlink(new_dir); | |
ac89b2ef | 997 | v9fs_dec_count(old_dir); |
b271ec47 | 998 | } |
3bc86de3 | 999 | v9fs_invalidate_inode_attr(old_inode); |
d28c61f0 AK |
1000 | v9fs_invalidate_inode_attr(old_dir); |
1001 | v9fs_invalidate_inode_attr(new_dir); | |
3bc86de3 | 1002 | |
a534c8d1 AK |
1003 | /* successful rename */ |
1004 | d_move(old_dentry, new_dentry); | |
b271ec47 | 1005 | } |
a534c8d1 | 1006 | up_write(&v9ses->rename_sem); |
22150c4f | 1007 | p9_client_clunk(newdirfid); |
2bad8471 | 1008 | |
bd238fb4 | 1009 | clunk_olddir: |
22150c4f | 1010 | p9_client_clunk(olddirfid); |
da977b2c | 1011 | |
bd238fb4 | 1012 | done: |
6636b6dc | 1013 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1014 | return retval; |
1015 | } | |
1016 | ||
1017 | /** | |
943ffb58 | 1018 | * v9fs_vfs_getattr - retrieve file metadata |
bc868036 | 1019 | * @mnt_userns: The user namespace of the mount |
a528d35e | 1020 | * @path: Object to query |
ee443996 | 1021 | * @stat: metadata structure to populate |
a528d35e DH |
1022 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
1023 | * @flags: AT_STATX_xxx setting | |
2bad8471 EVH |
1024 | * |
1025 | */ | |
1026 | ||
1027 | static int | |
549c7297 CB |
1028 | v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path, |
1029 | struct kstat *stat, u32 request_mask, unsigned int flags) | |
2bad8471 | 1030 | { |
a528d35e | 1031 | struct dentry *dentry = path->dentry; |
bd238fb4 LI |
1032 | struct v9fs_session_info *v9ses; |
1033 | struct p9_fid *fid; | |
51a87c55 | 1034 | struct p9_wstat *st; |
bd238fb4 | 1035 | |
5d385153 | 1036 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 1037 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 | 1038 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
0d56a451 | 1039 | generic_fillattr(&init_user_ns, d_inode(dentry), stat); |
a1211908 AK |
1040 | return 0; |
1041 | } | |
bd238fb4 LI |
1042 | fid = v9fs_fid_lookup(dentry); |
1043 | if (IS_ERR(fid)) | |
da977b2c | 1044 | return PTR_ERR(fid); |
2bad8471 | 1045 | |
bd238fb4 | 1046 | st = p9_client_stat(fid); |
6636b6dc | 1047 | p9_client_clunk(fid); |
bd238fb4 LI |
1048 | if (IS_ERR(st)) |
1049 | return PTR_ERR(st); | |
2bad8471 | 1050 | |
5e3cc1ee | 1051 | v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); |
0d56a451 | 1052 | generic_fillattr(&init_user_ns, d_inode(dentry), stat); |
2bad8471 | 1053 | |
62b2be59 | 1054 | p9stat_free(st); |
bd238fb4 LI |
1055 | kfree(st); |
1056 | return 0; | |
2bad8471 EVH |
1057 | } |
1058 | ||
1059 | /** | |
1060 | * v9fs_vfs_setattr - set file metadata | |
bc868036 | 1061 | * @mnt_userns: The user namespace of the mount |
2bad8471 EVH |
1062 | * @dentry: file whose metadata to set |
1063 | * @iattr: metadata assignment structure | |
1064 | * | |
1065 | */ | |
1066 | ||
549c7297 CB |
1067 | static int v9fs_vfs_setattr(struct user_namespace *mnt_userns, |
1068 | struct dentry *dentry, struct iattr *iattr) | |
2bad8471 | 1069 | { |
6636b6dc | 1070 | int retval, use_dentry = 0; |
bd238fb4 | 1071 | struct v9fs_session_info *v9ses; |
66246641 | 1072 | struct p9_fid *fid = NULL; |
bd238fb4 | 1073 | struct p9_wstat wstat; |
2bad8471 | 1074 | |
5d385153 | 1075 | p9_debug(P9_DEBUG_VFS, "\n"); |
2f221d6f | 1076 | retval = setattr_prepare(&init_user_ns, dentry, iattr); |
059c138b AK |
1077 | if (retval) |
1078 | return retval; | |
1079 | ||
bd238fb4 | 1080 | retval = -EPERM; |
42869c8a | 1081 | v9ses = v9fs_dentry2v9ses(dentry); |
66246641 JW |
1082 | if (iattr->ia_valid & ATTR_FILE) { |
1083 | fid = iattr->ia_file->private_data; | |
1084 | WARN_ON(!fid); | |
1085 | } | |
6636b6dc | 1086 | if (!fid) { |
66246641 | 1087 | fid = v9fs_fid_lookup(dentry); |
6636b6dc JW |
1088 | use_dentry = 1; |
1089 | } | |
da977b2c EVH |
1090 | if(IS_ERR(fid)) |
1091 | return PTR_ERR(fid); | |
2bad8471 | 1092 | |
531b1094 | 1093 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1094 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1095 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1096 | |
1097 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1098 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1099 | |
1100 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1101 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1102 | |
1103 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1104 | wstat.length = iattr->ia_size; |
2bad8471 | 1105 | |
dd6102fb | 1106 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1107 | if (iattr->ia_valid & ATTR_UID) |
1108 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1109 | |
531b1094 LI |
1110 | if (iattr->ia_valid & ATTR_GID) |
1111 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 | 1112 | } |
059c138b | 1113 | |
3dc5436a | 1114 | /* Write all dirty data */ |
e36cb0b8 | 1115 | if (d_is_reg(dentry)) |
2b0143b5 | 1116 | filemap_write_and_wait(d_inode(dentry)->i_mapping); |
3dc5436a | 1117 | |
f10fc50f | 1118 | retval = p9_client_wstat(fid, &wstat); |
6636b6dc JW |
1119 | |
1120 | if (use_dentry) | |
1121 | p9_client_clunk(fid); | |
1122 | ||
f10fc50f AK |
1123 | if (retval < 0) |
1124 | return retval; | |
059c138b AK |
1125 | |
1126 | if ((iattr->ia_valid & ATTR_SIZE) && | |
2b0143b5 DH |
1127 | iattr->ia_size != i_size_read(d_inode(dentry))) |
1128 | truncate_setsize(d_inode(dentry), iattr->ia_size); | |
059c138b | 1129 | |
2b0143b5 | 1130 | v9fs_invalidate_inode_attr(d_inode(dentry)); |
2bad8471 | 1131 | |
2f221d6f | 1132 | setattr_copy(&init_user_ns, d_inode(dentry), iattr); |
2b0143b5 | 1133 | mark_inode_dirty(d_inode(dentry)); |
1025774c | 1134 | return 0; |
2bad8471 EVH |
1135 | } |
1136 | ||
1137 | /** | |
531b1094 LI |
1138 | * v9fs_stat2inode - populate an inode structure with mistat info |
1139 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1140 | * @inode: inode to populate |
1141 | * @sb: superblock of filesystem | |
5e3cc1ee | 1142 | * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
2bad8471 EVH |
1143 | * |
1144 | */ | |
1145 | ||
1146 | void | |
51a87c55 | 1147 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
5e3cc1ee | 1148 | struct super_block *sb, unsigned int flags) |
2bad8471 | 1149 | { |
3eda0de6 | 1150 | umode_t mode; |
2bad8471 | 1151 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
b3cbea03 | 1152 | struct v9fs_inode *v9inode = V9FS_I(inode); |
2bad8471 | 1153 | |
bfe86848 | 1154 | set_nlink(inode, 1); |
2bad8471 | 1155 | |
531b1094 LI |
1156 | inode->i_atime.tv_sec = stat->atime; |
1157 | inode->i_mtime.tv_sec = stat->mtime; | |
1158 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1159 | |
bd32b82d LI |
1160 | inode->i_uid = v9ses->dfltuid; |
1161 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1162 | |
dd6102fb | 1163 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1164 | inode->i_uid = stat->n_uid; |
1165 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1166 | } |
5717144a | 1167 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
9652c732 AV |
1168 | if (v9fs_proto_dotu(v9ses)) { |
1169 | unsigned int i_nlink; | |
5717144a | 1170 | /* |
9652c732 AV |
1171 | * Hadlink support got added later to the .u extension. |
1172 | * So there can be a server out there that doesn't | |
1173 | * support this even with .u extension. That would | |
1174 | * just leave us with stat->extension being an empty | |
1175 | * string, though. | |
5717144a | 1176 | */ |
5717144a | 1177 | /* HARDLINKCOUNT %u */ |
9652c732 AV |
1178 | if (sscanf(stat->extension, |
1179 | " HARDLINKCOUNT %u", &i_nlink) == 1) | |
bfe86848 | 1180 | set_nlink(inode, i_nlink); |
5717144a AK |
1181 | } |
1182 | } | |
df345c67 | 1183 | mode = p9mode2perm(v9ses, stat); |
45089142 AK |
1184 | mode |= inode->i_mode & ~S_IALLUGO; |
1185 | inode->i_mode = mode; | |
2bad8471 | 1186 | |
5e3cc1ee HT |
1187 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
1188 | v9fs_i_size_write(inode, stat->length); | |
bd238fb4 | 1189 | /* not real number of blocks, but 512 byte ones ... */ |
5e3cc1ee | 1190 | inode->i_blocks = (stat->length + 512 - 1) >> 9; |
b3cbea03 | 1191 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
2bad8471 EVH |
1192 | } |
1193 | ||
1194 | /** | |
1195 | * v9fs_qid2ino - convert qid into inode number | |
1196 | * @qid: qid to hash | |
1197 | * | |
1198 | * BUG: potential for inode number collisions? | |
1199 | */ | |
1200 | ||
bd238fb4 | 1201 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1202 | { |
1203 | u64 path = qid->path + 2; | |
1204 | ino_t i = 0; | |
1205 | ||
1206 | if (sizeof(ino_t) == sizeof(path)) | |
1207 | memcpy(&i, &path, sizeof(ino_t)); | |
1208 | else | |
1209 | i = (ino_t) (path ^ (path >> 32)); | |
1210 | ||
1211 | return i; | |
1212 | } | |
1213 | ||
2bad8471 | 1214 | /** |
6b255391 | 1215 | * v9fs_vfs_get_link - follow a symlink path |
2bad8471 | 1216 | * @dentry: dentry for symlink |
6b255391 | 1217 | * @inode: inode for symlink |
fceef393 | 1218 | * @done: delayed call for when we are done with the return value |
2bad8471 EVH |
1219 | */ |
1220 | ||
6b255391 | 1221 | static const char *v9fs_vfs_get_link(struct dentry *dentry, |
fceef393 AV |
1222 | struct inode *inode, |
1223 | struct delayed_call *done) | |
2bad8471 | 1224 | { |
6b255391 AV |
1225 | struct v9fs_session_info *v9ses; |
1226 | struct p9_fid *fid; | |
51a87c55 | 1227 | struct p9_wstat *st; |
680baacb | 1228 | char *res; |
2bad8471 | 1229 | |
6b255391 AV |
1230 | if (!dentry) |
1231 | return ERR_PTR(-ECHILD); | |
1232 | ||
1233 | v9ses = v9fs_dentry2v9ses(dentry); | |
1234 | fid = v9fs_fid_lookup(dentry); | |
90e4fc88 AV |
1235 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
1236 | ||
ba17674f | 1237 | if (IS_ERR(fid)) |
90e4fc88 | 1238 | return ERR_CAST(fid); |
2bad8471 | 1239 | |
329176cc | 1240 | if (!v9fs_proto_dotu(v9ses)) |
90e4fc88 | 1241 | return ERR_PTR(-EBADF); |
2bad8471 | 1242 | |
bd238fb4 | 1243 | st = p9_client_stat(fid); |
6636b6dc | 1244 | p9_client_clunk(fid); |
bd238fb4 | 1245 | if (IS_ERR(st)) |
90e4fc88 | 1246 | return ERR_CAST(st); |
2bad8471 | 1247 | |
bd238fb4 | 1248 | if (!(st->mode & P9_DMSYMLINK)) { |
90e4fc88 AV |
1249 | p9stat_free(st); |
1250 | kfree(st); | |
1251 | return ERR_PTR(-EINVAL); | |
2bad8471 | 1252 | } |
680baacb | 1253 | res = st->extension; |
90e4fc88 | 1254 | st->extension = NULL; |
680baacb AV |
1255 | if (strlen(res) >= PATH_MAX) |
1256 | res[PATH_MAX - 1] = '\0'; | |
1257 | ||
62b2be59 | 1258 | p9stat_free(st); |
bd238fb4 | 1259 | kfree(st); |
fceef393 AV |
1260 | set_delayed_call(done, kfree_link, res); |
1261 | return res; | |
2bad8471 EVH |
1262 | } |
1263 | ||
ee443996 EVH |
1264 | /** |
1265 | * v9fs_vfs_mkspecial - create a special file | |
1266 | * @dir: inode to create special file in | |
1267 | * @dentry: dentry to create | |
fd2916bd | 1268 | * @perm: mode to create special file |
ee443996 EVH |
1269 | * @extension: 9p2000.u format extension string representing special file |
1270 | * | |
1271 | */ | |
1272 | ||
531b1094 | 1273 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
c2837de7 | 1274 | u32 perm, const char *extension) |
2bad8471 | 1275 | { |
bd238fb4 | 1276 | struct p9_fid *fid; |
d28c61f0 | 1277 | struct v9fs_session_info *v9ses; |
2bad8471 | 1278 | |
6a3124a3 | 1279 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1280 | if (!v9fs_proto_dotu(v9ses)) { |
5d385153 | 1281 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1282 | return -EPERM; |
2bad8471 EVH |
1283 | } |
1284 | ||
bd238fb4 LI |
1285 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1286 | P9_OREAD); | |
1287 | if (IS_ERR(fid)) | |
1288 | return PTR_ERR(fid); | |
da977b2c | 1289 | |
d28c61f0 | 1290 | v9fs_invalidate_inode_attr(dir); |
bd238fb4 | 1291 | p9_client_clunk(fid); |
6a3124a3 | 1292 | return 0; |
531b1094 LI |
1293 | } |
1294 | ||
1295 | /** | |
1296 | * v9fs_vfs_symlink - helper function to create symlinks | |
bc868036 | 1297 | * @mnt_userns: The user namespace of the mount |
531b1094 LI |
1298 | * @dir: directory inode containing symlink |
1299 | * @dentry: dentry for symlink | |
1300 | * @symname: symlink data | |
1301 | * | |
ee443996 | 1302 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1303 | * |
1304 | */ | |
1305 | ||
1306 | static int | |
549c7297 CB |
1307 | v9fs_vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, |
1308 | struct dentry *dentry, const char *symname) | |
531b1094 | 1309 | { |
4b8e9923 AV |
1310 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", |
1311 | dir->i_ino, dentry, symname); | |
531b1094 | 1312 | |
c2837de7 | 1313 | return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); |
531b1094 LI |
1314 | } |
1315 | ||
b46c267e AV |
1316 | #define U32_MAX_DIGITS 10 |
1317 | ||
531b1094 LI |
1318 | /** |
1319 | * v9fs_vfs_link - create a hardlink | |
1320 | * @old_dentry: dentry for file to link to | |
1321 | * @dir: inode destination for new link | |
1322 | * @dentry: dentry for link | |
1323 | * | |
1324 | */ | |
1325 | ||
531b1094 LI |
1326 | static int |
1327 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1328 | struct dentry *dentry) | |
1329 | { | |
1330 | int retval; | |
b46c267e | 1331 | char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ |
d28c61f0 | 1332 | struct p9_fid *oldfid; |
531b1094 | 1333 | |
4b8e9923 AV |
1334 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", |
1335 | dir->i_ino, dentry, old_dentry); | |
531b1094 | 1336 | |
da977b2c | 1337 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1338 | if (IS_ERR(oldfid)) |
da977b2c | 1339 | return PTR_ERR(oldfid); |
531b1094 | 1340 | |
16cce6d2 | 1341 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1342 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
c06c066a | 1343 | if (!retval) { |
2b0143b5 | 1344 | v9fs_refresh_inode(oldfid, d_inode(old_dentry)); |
d28c61f0 | 1345 | v9fs_invalidate_inode_attr(dir); |
c06c066a | 1346 | } |
bd238fb4 | 1347 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1348 | return retval; |
1349 | } | |
1350 | ||
1351 | /** | |
1352 | * v9fs_vfs_mknod - create a special file | |
bc868036 | 1353 | * @mnt_userns: The user namespace of the mount |
2bad8471 EVH |
1354 | * @dir: inode destination for new link |
1355 | * @dentry: dentry for file | |
1356 | * @mode: mode for creation | |
ee443996 | 1357 | * @rdev: device associated with special file |
2bad8471 EVH |
1358 | * |
1359 | */ | |
1360 | ||
1361 | static int | |
549c7297 CB |
1362 | v9fs_vfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, |
1363 | struct dentry *dentry, umode_t mode, dev_t rdev) | |
2bad8471 | 1364 | { |
c2837de7 | 1365 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
531b1094 | 1366 | int retval; |
b46c267e | 1367 | char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; |
c2837de7 | 1368 | u32 perm; |
2bad8471 | 1369 | |
4b8e9923 AV |
1370 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n", |
1371 | dir->i_ino, dentry, mode, | |
5d385153 | 1372 | MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1373 | |
2bad8471 EVH |
1374 | /* build extension */ |
1375 | if (S_ISBLK(mode)) | |
531b1094 | 1376 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1377 | else if (S_ISCHR(mode)) |
531b1094 | 1378 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
b46c267e | 1379 | else |
75cc5c9b | 1380 | *name = 0; |
2bad8471 | 1381 | |
c2837de7 AV |
1382 | perm = unixmode2p9mode(v9ses, mode); |
1383 | retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); | |
2bad8471 EVH |
1384 | |
1385 | return retval; | |
1386 | } | |
1387 | ||
b3cbea03 AK |
1388 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
1389 | { | |
45089142 AK |
1390 | int umode; |
1391 | dev_t rdev; | |
b3cbea03 AK |
1392 | struct p9_wstat *st; |
1393 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 1394 | unsigned int flags; |
b3cbea03 AK |
1395 | |
1396 | v9ses = v9fs_inode2v9ses(inode); | |
1397 | st = p9_client_stat(fid); | |
1398 | if (IS_ERR(st)) | |
1399 | return PTR_ERR(st); | |
45089142 AK |
1400 | /* |
1401 | * Don't update inode if the file type is different | |
1402 | */ | |
1403 | umode = p9mode2unixmode(v9ses, st, &rdev); | |
6e3e2c43 | 1404 | if (inode_wrong_type(inode, umode)) |
45089142 | 1405 | goto out; |
b3cbea03 | 1406 | |
b3cbea03 AK |
1407 | /* |
1408 | * We don't want to refresh inode->i_size, | |
1409 | * because we may have cached data | |
1410 | */ | |
5e3cc1ee HT |
1411 | flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? |
1412 | V9FS_STAT2INODE_KEEP_ISIZE : 0; | |
1413 | v9fs_stat2inode(st, inode, inode->i_sb, flags); | |
45089142 | 1414 | out: |
b3cbea03 AK |
1415 | p9stat_free(st); |
1416 | kfree(st); | |
1417 | return 0; | |
1418 | } | |
1419 | ||
9b6533c9 SK |
1420 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1421 | .create = v9fs_vfs_create, | |
1422 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1423 | .atomic_open = v9fs_vfs_atomic_open, |
9b6533c9 | 1424 | .symlink = v9fs_vfs_symlink, |
50cc42ff | 1425 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1426 | .unlink = v9fs_vfs_unlink, |
1427 | .mkdir = v9fs_vfs_mkdir, | |
1428 | .rmdir = v9fs_vfs_rmdir, | |
1d76e313 | 1429 | .mknod = v9fs_vfs_mknod, |
9b6533c9 SK |
1430 | .rename = v9fs_vfs_rename, |
1431 | .getattr = v9fs_vfs_getattr, | |
1432 | .setattr = v9fs_vfs_setattr, | |
1433 | }; | |
1434 | ||
754661f1 | 1435 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1436 | .create = v9fs_vfs_create, |
1437 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1438 | .atomic_open = v9fs_vfs_atomic_open, |
b501611a EVH |
1439 | .unlink = v9fs_vfs_unlink, |
1440 | .mkdir = v9fs_vfs_mkdir, | |
1441 | .rmdir = v9fs_vfs_rmdir, | |
1442 | .mknod = v9fs_vfs_mknod, | |
1443 | .rename = v9fs_vfs_rename, | |
1444 | .getattr = v9fs_vfs_getattr, | |
1445 | .setattr = v9fs_vfs_setattr, | |
1446 | }; | |
1447 | ||
754661f1 | 1448 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1449 | .getattr = v9fs_vfs_getattr, |
1450 | .setattr = v9fs_vfs_setattr, | |
1451 | }; | |
1452 | ||
754661f1 | 1453 | static const struct inode_operations v9fs_symlink_inode_operations = { |
6b255391 | 1454 | .get_link = v9fs_vfs_get_link, |
2bad8471 EVH |
1455 | .getattr = v9fs_vfs_getattr, |
1456 | .setattr = v9fs_vfs_setattr, | |
1457 | }; | |
9b6533c9 | 1458 |