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; | |
6e195b0f | 50 | |
2bad8471 EVH |
51 | res = mode & 0777; |
52 | if (S_ISDIR(mode)) | |
bd238fb4 | 53 | res |= P9_DMDIR; |
dd6102fb | 54 | if (v9fs_proto_dotu(v9ses)) { |
2bad8471 EVH |
55 | if (v9ses->nodev == 0) { |
56 | if (S_ISSOCK(mode)) | |
bd238fb4 | 57 | res |= P9_DMSOCKET; |
2bad8471 | 58 | if (S_ISFIFO(mode)) |
bd238fb4 | 59 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 60 | if (S_ISBLK(mode)) |
bd238fb4 | 61 | res |= P9_DMDEVICE; |
2bad8471 | 62 | if (S_ISCHR(mode)) |
bd238fb4 | 63 | res |= P9_DMDEVICE; |
2bad8471 EVH |
64 | } |
65 | ||
66 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 67 | res |= P9_DMSETUID; |
2bad8471 | 68 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 69 | res |= P9_DMSETGID; |
d199d652 AL |
70 | if ((mode & S_ISVTX) == S_ISVTX) |
71 | res |= P9_DMSETVTX; | |
2bad8471 | 72 | } |
2bad8471 EVH |
73 | return res; |
74 | } | |
75 | ||
df345c67 AK |
76 | /** |
77 | * p9mode2perm- convert plan9 mode bits to unix permission bits | |
78 | * @v9ses: v9fs session information | |
79 | * @stat: p9_wstat from which mode need to be derived | |
80 | * | |
81 | */ | |
82 | static int p9mode2perm(struct v9fs_session_info *v9ses, | |
83 | struct p9_wstat *stat) | |
84 | { | |
85 | int res; | |
86 | int mode = stat->mode; | |
87 | ||
88 | res = mode & S_IALLUGO; | |
89 | if (v9fs_proto_dotu(v9ses)) { | |
90 | if ((mode & P9_DMSETUID) == P9_DMSETUID) | |
91 | res |= S_ISUID; | |
92 | ||
93 | if ((mode & P9_DMSETGID) == P9_DMSETGID) | |
94 | res |= S_ISGID; | |
95 | ||
96 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
97 | res |= S_ISVTX; | |
98 | } | |
99 | return res; | |
100 | } | |
101 | ||
2bad8471 EVH |
102 | /** |
103 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
104 | * @v9ses: v9fs session information | |
45089142 AK |
105 | * @stat: p9_wstat from which mode need to be derived |
106 | * @rdev: major number, minor number in case of device files. | |
2bad8471 EVH |
107 | * |
108 | */ | |
3eda0de6 AV |
109 | static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, |
110 | struct p9_wstat *stat, dev_t *rdev) | |
2bad8471 | 111 | { |
05f975cd | 112 | int res, r; |
3eda0de6 | 113 | u32 mode = stat->mode; |
2bad8471 | 114 | |
45089142 | 115 | *rdev = 0; |
df345c67 | 116 | res = p9mode2perm(v9ses, stat); |
2bad8471 | 117 | |
bd238fb4 | 118 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 119 | res |= S_IFDIR; |
dd6102fb | 120 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
2bad8471 | 121 | res |= S_IFLNK; |
dd6102fb | 122 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
123 | && (v9ses->nodev == 0)) |
124 | res |= S_IFSOCK; | |
dd6102fb | 125 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
126 | && (v9ses->nodev == 0)) |
127 | res |= S_IFIFO; | |
dd6102fb | 128 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
45089142 | 129 | && (v9ses->nodev == 0)) { |
05f975cd | 130 | char type = 0; |
45089142 AK |
131 | int major = -1, minor = -1; |
132 | ||
05f975cd DM |
133 | r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); |
134 | if (r != 3) { | |
135 | p9_debug(P9_DEBUG_ERROR, | |
136 | "invalid device string, umode will be bogus: %s\n", | |
137 | stat->extension); | |
138 | return res; | |
139 | } | |
45089142 AK |
140 | switch (type) { |
141 | case 'c': | |
142 | res |= S_IFCHR; | |
143 | break; | |
144 | case 'b': | |
145 | res |= S_IFBLK; | |
146 | break; | |
147 | default: | |
5d385153 JP |
148 | p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", |
149 | type, stat->extension); | |
51958817 | 150 | } |
45089142 AK |
151 | *rdev = MKDEV(major, minor); |
152 | } else | |
2bad8471 EVH |
153 | res |= S_IFREG; |
154 | ||
2bad8471 EVH |
155 | return res; |
156 | } | |
157 | ||
ee443996 EVH |
158 | /** |
159 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
160 | * @uflags: flags to convert | |
2e4bef41 | 161 | * @extended: if .u extensions are active |
ee443996 EVH |
162 | */ |
163 | ||
2e4bef41 | 164 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
165 | { |
166 | int ret; | |
167 | ||
168 | ret = 0; | |
169 | switch (uflags&3) { | |
170 | default: | |
171 | case O_RDONLY: | |
bd238fb4 | 172 | ret = P9_OREAD; |
6a3124a3 LI |
173 | break; |
174 | ||
175 | case O_WRONLY: | |
bd238fb4 | 176 | ret = P9_OWRITE; |
6a3124a3 LI |
177 | break; |
178 | ||
179 | case O_RDWR: | |
bd238fb4 | 180 | ret = P9_ORDWR; |
6a3124a3 LI |
181 | break; |
182 | } | |
183 | ||
2e4bef41 EVH |
184 | if (extended) { |
185 | if (uflags & O_EXCL) | |
186 | ret |= P9_OEXCL; | |
187 | ||
188 | if (uflags & O_APPEND) | |
189 | ret |= P9_OAPPEND; | |
190 | } | |
6a3124a3 LI |
191 | |
192 | return ret; | |
193 | } | |
194 | ||
2bad8471 | 195 | /** |
531b1094 | 196 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
531b1094 | 197 | * @wstat: structure to initialize |
2bad8471 EVH |
198 | * |
199 | */ | |
200 | ||
7a4439c4 | 201 | void |
bd238fb4 | 202 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 203 | { |
531b1094 LI |
204 | wstat->type = ~0; |
205 | wstat->dev = ~0; | |
206 | wstat->qid.type = ~0; | |
207 | wstat->qid.version = ~0; | |
208 | *((long long *)&wstat->qid.path) = ~0; | |
209 | wstat->mode = ~0; | |
210 | wstat->atime = ~0; | |
211 | wstat->mtime = ~0; | |
212 | wstat->length = ~0; | |
213 | wstat->name = NULL; | |
214 | wstat->uid = NULL; | |
215 | wstat->gid = NULL; | |
216 | wstat->muid = NULL; | |
447c5094 EB |
217 | wstat->n_uid = INVALID_UID; |
218 | wstat->n_gid = INVALID_GID; | |
219 | wstat->n_muid = INVALID_UID; | |
531b1094 | 220 | wstat->extension = NULL; |
2bad8471 EVH |
221 | } |
222 | ||
60e78d2c AK |
223 | /** |
224 | * v9fs_alloc_inode - helper function to allocate an inode | |
bc868036 | 225 | * @sb: The superblock to allocate the inode from |
60e78d2c | 226 | */ |
60e78d2c AK |
227 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
228 | { | |
a78ce05d | 229 | struct v9fs_inode *v9inode; |
6e195b0f | 230 | |
fd60b288 | 231 | v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); |
a78ce05d | 232 | if (!v9inode) |
60e78d2c | 233 | return NULL; |
a78ce05d AK |
234 | #ifdef CONFIG_9P_FSCACHE |
235 | v9inode->fscache = NULL; | |
a78ce05d | 236 | #endif |
6b39f6d2 | 237 | v9inode->writeback_fid = NULL; |
b3cbea03 | 238 | v9inode->cache_validity = 0; |
5a7e0a8c | 239 | mutex_init(&v9inode->v_mutex); |
a78ce05d | 240 | return &v9inode->vfs_inode; |
60e78d2c AK |
241 | } |
242 | ||
243 | /** | |
5e8a0770 | 244 | * v9fs_free_inode - destroy an inode |
bc868036 | 245 | * @inode: The inode to be freed |
60e78d2c AK |
246 | */ |
247 | ||
5e8a0770 | 248 | void v9fs_free_inode(struct inode *inode) |
60e78d2c | 249 | { |
a78ce05d | 250 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
60e78d2c | 251 | } |
fa0d7e3d | 252 | |
5ffc0cb3 | 253 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
3eda0de6 | 254 | struct inode *inode, umode_t mode, dev_t rdev) |
2bad8471 | 255 | { |
5ffc0cb3 | 256 | int err = 0; |
2bb54115 | 257 | |
6e195b0f | 258 | inode_init_owner(&init_user_ns, inode, NULL, mode); |
2bb54115 | 259 | inode->i_blocks = 0; |
45089142 | 260 | inode->i_rdev = rdev; |
078cd827 | 261 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
2bb54115 | 262 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
987a6485 | 263 | inode->i_private = NULL; |
2bb54115 AK |
264 | |
265 | switch (mode & S_IFMT) { | |
266 | case S_IFIFO: | |
267 | case S_IFBLK: | |
268 | case S_IFCHR: | |
269 | case S_IFSOCK: | |
4b43516a MK |
270 | if (v9fs_proto_dotl(v9ses)) { |
271 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
4b43516a MK |
272 | } else if (v9fs_proto_dotu(v9ses)) { |
273 | inode->i_op = &v9fs_file_inode_operations; | |
4b43516a | 274 | } else { |
5d385153 JP |
275 | p9_debug(P9_DEBUG_ERROR, |
276 | "special files without extended mode\n"); | |
2bb54115 AK |
277 | err = -EINVAL; |
278 | goto error; | |
2bad8471 | 279 | } |
2bb54115 AK |
280 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
281 | break; | |
282 | case S_IFREG: | |
9b6533c9 SK |
283 | if (v9fs_proto_dotl(v9ses)) { |
284 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
fb89b45c DM |
285 | if (v9ses->cache == CACHE_LOOSE || |
286 | v9ses->cache == CACHE_FSCACHE) | |
29236f4e AK |
287 | inode->i_fop = |
288 | &v9fs_cached_file_operations_dotl; | |
fb89b45c DM |
289 | else if (v9ses->cache == CACHE_MMAP) |
290 | inode->i_fop = &v9fs_mmap_file_operations_dotl; | |
29236f4e AK |
291 | else |
292 | inode->i_fop = &v9fs_file_operations_dotl; | |
9b6533c9 SK |
293 | } else { |
294 | inode->i_op = &v9fs_file_inode_operations; | |
fb89b45c DM |
295 | if (v9ses->cache == CACHE_LOOSE || |
296 | v9ses->cache == CACHE_FSCACHE) | |
297 | inode->i_fop = | |
298 | &v9fs_cached_file_operations; | |
299 | else if (v9ses->cache == CACHE_MMAP) | |
300 | inode->i_fop = &v9fs_mmap_file_operations; | |
29236f4e AK |
301 | else |
302 | inode->i_fop = &v9fs_file_operations; | |
9b6533c9 SK |
303 | } |
304 | ||
2bb54115 AK |
305 | break; |
306 | case S_IFLNK: | |
9b6533c9 | 307 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
5d385153 JP |
308 | p9_debug(P9_DEBUG_ERROR, |
309 | "extended modes used with legacy protocol\n"); | |
2bb54115 AK |
310 | err = -EINVAL; |
311 | goto error; | |
312 | } | |
9b6533c9 SK |
313 | |
314 | if (v9fs_proto_dotl(v9ses)) | |
315 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
316 | else | |
317 | inode->i_op = &v9fs_symlink_inode_operations; | |
318 | ||
2bb54115 AK |
319 | break; |
320 | case S_IFDIR: | |
321 | inc_nlink(inode); | |
9b6533c9 SK |
322 | if (v9fs_proto_dotl(v9ses)) |
323 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
324 | else if (v9fs_proto_dotu(v9ses)) | |
325 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
326 | else |
327 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
328 | |
329 | if (v9fs_proto_dotl(v9ses)) | |
330 | inode->i_fop = &v9fs_dir_operations_dotl; | |
331 | else | |
332 | inode->i_fop = &v9fs_dir_operations; | |
333 | ||
2bb54115 AK |
334 | break; |
335 | default: | |
609eac1c | 336 | p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", |
5d385153 | 337 | mode, mode & S_IFMT); |
2bb54115 AK |
338 | err = -EINVAL; |
339 | goto error; | |
2bad8471 | 340 | } |
5ffc0cb3 AK |
341 | error: |
342 | return err; | |
2bb54115 | 343 | |
5ffc0cb3 | 344 | } |
2bb54115 | 345 | |
5ffc0cb3 AK |
346 | /** |
347 | * v9fs_get_inode - helper function to setup an inode | |
348 | * @sb: superblock | |
349 | * @mode: mode to setup inode with | |
bc868036 | 350 | * @rdev: The device numbers to set |
5ffc0cb3 AK |
351 | */ |
352 | ||
3eda0de6 | 353 | struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) |
5ffc0cb3 AK |
354 | { |
355 | int err; | |
356 | struct inode *inode; | |
357 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
358 | ||
609eac1c | 359 | p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); |
5ffc0cb3 AK |
360 | |
361 | inode = new_inode(sb); | |
362 | if (!inode) { | |
5d385153 JP |
363 | pr_warn("%s (%d): Problem allocating inode\n", |
364 | __func__, task_pid_nr(current)); | |
5ffc0cb3 AK |
365 | return ERR_PTR(-ENOMEM); |
366 | } | |
45089142 | 367 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
5ffc0cb3 AK |
368 | if (err) { |
369 | iput(inode); | |
370 | return ERR_PTR(err); | |
371 | } | |
372 | return inode; | |
2bad8471 EVH |
373 | } |
374 | ||
60e78d2c | 375 | /** |
bc868036 | 376 | * v9fs_evict_inode - Remove an inode from the inode cache |
60e78d2c AK |
377 | * @inode: inode to release |
378 | * | |
379 | */ | |
b57922d9 | 380 | void v9fs_evict_inode(struct inode *inode) |
60e78d2c | 381 | { |
6b39f6d2 | 382 | struct v9fs_inode *v9inode = V9FS_I(inode); |
93c84614 | 383 | __le32 version; |
6b39f6d2 | 384 | |
4ad78628 | 385 | truncate_inode_pages_final(&inode->i_data); |
93c84614 DH |
386 | version = cpu_to_le32(v9inode->qid.version); |
387 | fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, | |
388 | &version); | |
dbd5768f | 389 | clear_inode(inode); |
4ad78628 | 390 | filemap_fdatawrite(&inode->i_data); |
60e78d2c | 391 | |
24e42e32 | 392 | fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); |
6b39f6d2 AK |
393 | /* clunk the fid stashed in writeback_fid */ |
394 | if (v9inode->writeback_fid) { | |
395 | p9_client_clunk(v9inode->writeback_fid); | |
396 | v9inode->writeback_fid = NULL; | |
3cf387d7 | 397 | } |
60e78d2c AK |
398 | } |
399 | ||
fd2421f5 AK |
400 | static int v9fs_test_inode(struct inode *inode, void *data) |
401 | { | |
402 | int umode; | |
45089142 | 403 | dev_t rdev; |
fd2421f5 AK |
404 | struct v9fs_inode *v9inode = V9FS_I(inode); |
405 | struct p9_wstat *st = (struct p9_wstat *)data; | |
406 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); | |
407 | ||
45089142 | 408 | umode = p9mode2unixmode(v9ses, st, &rdev); |
fd2421f5 | 409 | /* don't match inode of different type */ |
6e3e2c43 | 410 | if (inode_wrong_type(inode, umode)) |
fd2421f5 AK |
411 | return 0; |
412 | ||
413 | /* compare qid details */ | |
414 | if (memcmp(&v9inode->qid.version, | |
415 | &st->qid.version, sizeof(v9inode->qid.version))) | |
416 | return 0; | |
417 | ||
418 | if (v9inode->qid.type != st->qid.type) | |
419 | return 0; | |
8ee03163 TT |
420 | |
421 | if (v9inode->qid.path != st->qid.path) | |
422 | return 0; | |
fd2421f5 AK |
423 | return 1; |
424 | } | |
425 | ||
ed80fcfa AK |
426 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
427 | { | |
428 | return 0; | |
429 | } | |
430 | ||
fd2421f5 AK |
431 | static int v9fs_set_inode(struct inode *inode, void *data) |
432 | { | |
433 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
434 | struct p9_wstat *st = (struct p9_wstat *)data; | |
435 | ||
436 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
437 | return 0; | |
438 | } | |
439 | ||
5ffc0cb3 AK |
440 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
441 | struct p9_qid *qid, | |
ed80fcfa AK |
442 | struct p9_wstat *st, |
443 | int new) | |
6a3124a3 | 444 | { |
45089142 | 445 | dev_t rdev; |
3eda0de6 AV |
446 | int retval; |
447 | umode_t umode; | |
5ffc0cb3 AK |
448 | unsigned long i_ino; |
449 | struct inode *inode; | |
450 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
6e195b0f | 451 | int (*test)(struct inode *inode, void *data); |
ed80fcfa AK |
452 | |
453 | if (new) | |
454 | test = v9fs_test_new_inode; | |
455 | else | |
456 | test = v9fs_test_inode; | |
2bad8471 | 457 | |
5ffc0cb3 | 458 | i_ino = v9fs_qid2ino(qid); |
ed80fcfa | 459 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); |
5ffc0cb3 AK |
460 | if (!inode) |
461 | return ERR_PTR(-ENOMEM); | |
462 | if (!(inode->i_state & I_NEW)) | |
463 | return inode; | |
464 | /* | |
465 | * initialize the inode with the stat info | |
466 | * FIXME!! we may need support for stale inodes | |
467 | * later. | |
468 | */ | |
fd2421f5 | 469 | inode->i_ino = i_ino; |
45089142 AK |
470 | umode = p9mode2unixmode(v9ses, st, &rdev); |
471 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); | |
5ffc0cb3 | 472 | if (retval) |
6a3124a3 | 473 | goto error; |
60e78d2c | 474 | |
5e3cc1ee | 475 | v9fs_stat2inode(st, inode, sb, 0); |
5ffc0cb3 | 476 | v9fs_cache_inode_get_cookie(inode); |
5ffc0cb3 AK |
477 | unlock_new_inode(inode); |
478 | return inode; | |
6a3124a3 | 479 | error: |
0a73d0a2 | 480 | iget_failed(inode); |
5ffc0cb3 AK |
481 | return ERR_PTR(retval); |
482 | ||
483 | } | |
484 | ||
485 | struct inode * | |
a78ce05d | 486 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 487 | struct super_block *sb, int new) |
5ffc0cb3 AK |
488 | { |
489 | struct p9_wstat *st; | |
490 | struct inode *inode = NULL; | |
491 | ||
492 | st = p9_client_stat(fid); | |
493 | if (IS_ERR(st)) | |
494 | return ERR_CAST(st); | |
495 | ||
ed80fcfa | 496 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
02bc3567 | 497 | p9stat_free(st); |
bd238fb4 | 498 | kfree(st); |
5ffc0cb3 | 499 | return inode; |
2bad8471 EVH |
500 | } |
501 | ||
f88657ce AK |
502 | /** |
503 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to | |
504 | * plan 9 AT flag. | |
505 | * @flags: flags to convert | |
506 | */ | |
507 | static int v9fs_at_to_dotl_flags(int flags) | |
508 | { | |
509 | int rflags = 0; | |
6e195b0f | 510 | |
f88657ce AK |
511 | if (flags & AT_REMOVEDIR) |
512 | rflags |= P9_DOTL_AT_REMOVEDIR; | |
6e195b0f | 513 | |
f88657ce AK |
514 | return rflags; |
515 | } | |
516 | ||
ac89b2ef EG |
517 | /** |
518 | * v9fs_dec_count - helper functon to drop i_nlink. | |
519 | * | |
520 | * If a directory had nlink <= 2 (including . and ..), then we should not drop | |
521 | * the link count, which indicates the underlying exported fs doesn't maintain | |
522 | * nlink accurately. e.g. | |
523 | * - overlayfs sets nlink to 1 for merged dir | |
524 | * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more | |
525 | * than EXT4_LINK_MAX (65000) links. | |
526 | * | |
527 | * @inode: inode whose nlink is being dropped | |
528 | */ | |
529 | static void v9fs_dec_count(struct inode *inode) | |
530 | { | |
531 | if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) | |
532 | drop_nlink(inode); | |
533 | } | |
534 | ||
2bad8471 EVH |
535 | /** |
536 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 | 537 | * @dir: directory inode that is being deleted |
48e370ff | 538 | * @dentry: dentry that is being deleted |
fd2916bd | 539 | * @flags: removing a directory |
2bad8471 EVH |
540 | * |
541 | */ | |
542 | ||
48e370ff | 543 | static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) |
2bad8471 | 544 | { |
48e370ff AK |
545 | struct inode *inode; |
546 | int retval = -EOPNOTSUPP; | |
547 | struct p9_fid *v9fid, *dfid; | |
548 | struct v9fs_session_info *v9ses; | |
2bad8471 | 549 | |
5d385153 JP |
550 | p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", |
551 | dir, dentry, flags); | |
2bad8471 | 552 | |
48e370ff | 553 | v9ses = v9fs_inode2v9ses(dir); |
2b0143b5 | 554 | inode = d_inode(dentry); |
77d5a6b7 | 555 | dfid = v9fs_parent_fid(dentry); |
48e370ff AK |
556 | if (IS_ERR(dfid)) { |
557 | retval = PTR_ERR(dfid); | |
5d385153 | 558 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); |
48e370ff AK |
559 | return retval; |
560 | } | |
561 | if (v9fs_proto_dotl(v9ses)) | |
f88657ce AK |
562 | retval = p9_client_unlinkat(dfid, dentry->d_name.name, |
563 | v9fs_at_to_dotl_flags(flags)); | |
6636b6dc | 564 | p9_client_clunk(dfid); |
48e370ff AK |
565 | if (retval == -EOPNOTSUPP) { |
566 | /* Try the one based on path */ | |
567 | v9fid = v9fs_fid_clone(dentry); | |
568 | if (IS_ERR(v9fid)) | |
569 | return PTR_ERR(v9fid); | |
570 | retval = p9_client_remove(v9fid); | |
571 | } | |
b271ec47 AK |
572 | if (!retval) { |
573 | /* | |
574 | * directories on unlink should have zero | |
575 | * link count | |
576 | */ | |
48e370ff AK |
577 | if (flags & AT_REMOVEDIR) { |
578 | clear_nlink(inode); | |
ac89b2ef | 579 | v9fs_dec_count(dir); |
b271ec47 | 580 | } else |
ac89b2ef | 581 | v9fs_dec_count(inode); |
d28c61f0 | 582 | |
48e370ff | 583 | v9fs_invalidate_inode_attr(inode); |
d28c61f0 | 584 | v9fs_invalidate_inode_attr(dir); |
154372e6 EVH |
585 | |
586 | /* invalidate all fids associated with dentry */ | |
587 | /* NOTE: This will not include open fids */ | |
588 | dentry->d_op->d_release(dentry); | |
b271ec47 | 589 | } |
d994f405 | 590 | return retval; |
2bad8471 EVH |
591 | } |
592 | ||
593 | /** | |
bd238fb4 | 594 | * v9fs_create - Create a file |
ee443996 EVH |
595 | * @v9ses: session information |
596 | * @dir: directory that dentry is being created in | |
bd238fb4 | 597 | * @dentry: dentry that is being created |
0e15597e | 598 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
599 | * @perm: create permissions |
600 | * @mode: open mode | |
2bad8471 EVH |
601 | * |
602 | */ | |
bd238fb4 LI |
603 | static struct p9_fid * |
604 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
605 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 606 | { |
6a3124a3 | 607 | int err; |
7880b43b | 608 | const unsigned char *name; |
6636b6dc | 609 | struct p9_fid *dfid, *ofid = NULL, *fid = NULL; |
6a3124a3 | 610 | struct inode *inode; |
6a3124a3 | 611 | |
4b8e9923 | 612 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
51a87c55 | 613 | |
bd238fb4 | 614 | err = 0; |
7880b43b | 615 | name = dentry->d_name.name; |
77d5a6b7 | 616 | dfid = v9fs_parent_fid(dentry); |
ba17674f | 617 | if (IS_ERR(dfid)) { |
da977b2c | 618 | err = PTR_ERR(dfid); |
5d385153 | 619 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
6d27e64d | 620 | return ERR_PTR(err); |
da977b2c | 621 | } |
6a3124a3 | 622 | |
bd238fb4 | 623 | /* clone a fid to use for creation */ |
7d50a29f | 624 | ofid = clone_fid(dfid); |
bd238fb4 LI |
625 | if (IS_ERR(ofid)) { |
626 | err = PTR_ERR(ofid); | |
5d385153 | 627 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
6636b6dc | 628 | p9_client_clunk(dfid); |
6d27e64d | 629 | return ERR_PTR(err); |
bd238fb4 | 630 | } |
6a3124a3 | 631 | |
bd238fb4 | 632 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 | 633 | if (err < 0) { |
5d385153 | 634 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
6636b6dc | 635 | p9_client_clunk(dfid); |
6a3124a3 | 636 | goto error; |
6d27e64d | 637 | } |
6a3124a3 | 638 | |
b6054793 AK |
639 | if (!(perm & P9_DMLINK)) { |
640 | /* now walk from the parent so we can get unopened fid */ | |
641 | fid = p9_client_walk(dfid, 1, &name, 1); | |
642 | if (IS_ERR(fid)) { | |
643 | err = PTR_ERR(fid); | |
644 | p9_debug(P9_DEBUG_VFS, | |
645 | "p9_client_walk failed %d\n", err); | |
646 | fid = NULL; | |
6636b6dc | 647 | p9_client_clunk(dfid); |
b6054793 AK |
648 | goto error; |
649 | } | |
650 | /* | |
651 | * instantiate inode and assign the unopened fid to the dentry | |
652 | */ | |
653 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
654 | if (IS_ERR(inode)) { | |
655 | err = PTR_ERR(inode); | |
656 | p9_debug(P9_DEBUG_VFS, | |
657 | "inode creation failed %d\n", err); | |
6636b6dc | 658 | p9_client_clunk(dfid); |
b6054793 AK |
659 | goto error; |
660 | } | |
2ea03e1d | 661 | v9fs_fid_add(dentry, fid); |
b6054793 | 662 | d_instantiate(dentry, inode); |
6a3124a3 | 663 | } |
6636b6dc | 664 | p9_client_clunk(dfid); |
bd238fb4 | 665 | return ofid; |
bd238fb4 | 666 | error: |
bd238fb4 LI |
667 | if (ofid) |
668 | p9_client_clunk(ofid); | |
669 | ||
670 | if (fid) | |
671 | p9_client_clunk(fid); | |
672 | ||
673 | return ERR_PTR(err); | |
674 | } | |
675 | ||
676 | /** | |
e43ae79c | 677 | * v9fs_vfs_create - VFS hook to create a regular file |
bc868036 DH |
678 | * @mnt_userns: The user namespace of the mount |
679 | * @dir: The parent directory | |
680 | * @dentry: The name of file to be created | |
681 | * @mode: The UNIX file mode to set | |
682 | * @excl: True if the file must not yet exist | |
e43ae79c MS |
683 | * |
684 | * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called | |
685 | * for mknod(2). | |
686 | * | |
bd238fb4 | 687 | */ |
6a3124a3 | 688 | |
bd238fb4 | 689 | static int |
549c7297 CB |
690 | v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir, |
691 | struct dentry *dentry, umode_t mode, bool excl) | |
bd238fb4 | 692 | { |
e43ae79c MS |
693 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
694 | u32 perm = unixmode2p9mode(v9ses, mode); | |
695 | struct p9_fid *fid; | |
bd238fb4 | 696 | |
e43ae79c MS |
697 | /* P9_OEXCL? */ |
698 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); | |
699 | if (IS_ERR(fid)) | |
700 | return PTR_ERR(fid); | |
bd238fb4 | 701 | |
d28c61f0 | 702 | v9fs_invalidate_inode_attr(dir); |
e43ae79c | 703 | p9_client_clunk(fid); |
6a3124a3 LI |
704 | |
705 | return 0; | |
2bad8471 EVH |
706 | } |
707 | ||
708 | /** | |
709 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
bc868036 | 710 | * @mnt_userns: The user namespace of the mount |
ee443996 | 711 | * @dir: inode that is being unlinked |
2bad8471 EVH |
712 | * @dentry: dentry that is being unlinked |
713 | * @mode: mode for new directory | |
714 | * | |
715 | */ | |
716 | ||
549c7297 CB |
717 | static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, |
718 | struct dentry *dentry, umode_t mode) | |
2bad8471 | 719 | { |
6a3124a3 | 720 | int err; |
bd238fb4 | 721 | u32 perm; |
bd238fb4 | 722 | struct p9_fid *fid; |
d28c61f0 | 723 | struct v9fs_session_info *v9ses; |
6a3124a3 | 724 | |
4b8e9923 | 725 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
bd238fb4 | 726 | err = 0; |
6a3124a3 | 727 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 728 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
729 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
730 | if (IS_ERR(fid)) { | |
731 | err = PTR_ERR(fid); | |
732 | fid = NULL; | |
d28c61f0 | 733 | } else { |
b271ec47 | 734 | inc_nlink(dir); |
d28c61f0 AK |
735 | v9fs_invalidate_inode_attr(dir); |
736 | } | |
6a3124a3 | 737 | |
bd238fb4 LI |
738 | if (fid) |
739 | p9_client_clunk(fid); | |
6a3124a3 | 740 | |
6a3124a3 | 741 | return err; |
2bad8471 EVH |
742 | } |
743 | ||
744 | /** | |
745 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
746 | * @dir: inode that is being walked from | |
747 | * @dentry: dentry that is being walked to? | |
fd2916bd | 748 | * @flags: lookup flags (unused) |
2bad8471 EVH |
749 | * |
750 | */ | |
751 | ||
53c06f4e | 752 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 753 | unsigned int flags) |
2bad8471 | 754 | { |
73f50717 | 755 | struct dentry *res; |
2bad8471 | 756 | struct v9fs_session_info *v9ses; |
bd238fb4 | 757 | struct p9_fid *dfid, *fid; |
2bad8471 | 758 | struct inode *inode; |
7880b43b | 759 | const unsigned char *name; |
2bad8471 | 760 | |
4b8e9923 AV |
761 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", |
762 | dir, dentry, dentry, flags); | |
2bad8471 | 763 | |
11e9b49b SK |
764 | if (dentry->d_name.len > NAME_MAX) |
765 | return ERR_PTR(-ENAMETOOLONG); | |
766 | ||
2bad8471 | 767 | v9ses = v9fs_inode2v9ses(dir); |
a534c8d1 | 768 | /* We can walk d_parent because we hold the dir->i_mutex */ |
77d5a6b7 | 769 | dfid = v9fs_parent_fid(dentry); |
bd238fb4 | 770 | if (IS_ERR(dfid)) |
e231c2ee | 771 | return ERR_CAST(dfid); |
bd238fb4 | 772 | |
73f50717 AK |
773 | /* |
774 | * Make sure we don't use a wrong inode due to parallel | |
775 | * unlink. For cached mode create calls request for new | |
776 | * inode. But with cache disabled, lookup should do this. | |
777 | */ | |
500e2ab6 AV |
778 | name = dentry->d_name.name; |
779 | fid = p9_client_walk(dfid, 1, &name, 1); | |
6636b6dc | 780 | p9_client_clunk(dfid); |
500e2ab6 AV |
781 | if (fid == ERR_PTR(-ENOENT)) |
782 | inode = NULL; | |
783 | else if (IS_ERR(fid)) | |
784 | inode = ERR_CAST(fid); | |
785 | else if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) | |
73f50717 AK |
786 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
787 | else | |
788 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
73f50717 AK |
789 | /* |
790 | * If we had a rename on the server and a parallel lookup | |
791 | * for the new name, then make sure we instantiate with | |
792 | * the new name. ie look up for a/b, while on server somebody | |
793 | * moved b under k and client parallely did a lookup for | |
794 | * k/b. | |
795 | */ | |
41d28bca | 796 | res = d_splice_alias(inode, dentry); |
500e2ab6 AV |
797 | if (!IS_ERR(fid)) { |
798 | if (!res) | |
799 | v9fs_fid_add(dentry, fid); | |
800 | else if (!IS_ERR(res)) | |
801 | v9fs_fid_add(res, fid); | |
802 | else | |
803 | p9_client_clunk(fid); | |
804 | } | |
7b5be621 | 805 | return res; |
2bad8471 EVH |
806 | } |
807 | ||
d9585277 | 808 | static int |
e43ae79c | 809 | v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, |
6e195b0f | 810 | struct file *file, unsigned int flags, umode_t mode) |
e43ae79c MS |
811 | { |
812 | int err; | |
813 | u32 perm; | |
e43ae79c MS |
814 | struct v9fs_inode *v9inode; |
815 | struct v9fs_session_info *v9ses; | |
816 | struct p9_fid *fid, *inode_fid; | |
817 | struct dentry *res = NULL; | |
987a6485 | 818 | struct inode *inode; |
e43ae79c | 819 | |
00699ad8 | 820 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 821 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 822 | if (IS_ERR(res)) |
d9585277 | 823 | return PTR_ERR(res); |
e43ae79c MS |
824 | |
825 | if (res) | |
826 | dentry = res; | |
827 | } | |
828 | ||
829 | /* Only creates */ | |
2b0143b5 | 830 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
e45198a6 | 831 | return finish_no_open(file, res); |
e43ae79c MS |
832 | |
833 | err = 0; | |
fae74696 | 834 | |
e43ae79c MS |
835 | v9ses = v9fs_inode2v9ses(dir); |
836 | perm = unixmode2p9mode(v9ses, mode); | |
837 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
838 | v9fs_uflags2omode(flags, | |
839 | v9fs_proto_dotu(v9ses))); | |
840 | if (IS_ERR(fid)) { | |
841 | err = PTR_ERR(fid); | |
842 | fid = NULL; | |
843 | goto error; | |
844 | } | |
845 | ||
846 | v9fs_invalidate_inode_attr(dir); | |
987a6485 GK |
847 | inode = d_inode(dentry); |
848 | v9inode = V9FS_I(inode); | |
e43ae79c | 849 | mutex_lock(&v9inode->v_mutex); |
fb89b45c DM |
850 | if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && |
851 | !v9inode->writeback_fid && | |
e43ae79c MS |
852 | ((flags & O_ACCMODE) != O_RDONLY)) { |
853 | /* | |
854 | * clone a fid and add it to writeback_fid | |
855 | * we do it during open time instead of | |
856 | * page dirty time via write_begin/page_mkwrite | |
857 | * because we want write after unlink usecase | |
858 | * to work. | |
859 | */ | |
860 | inode_fid = v9fs_writeback_fid(dentry); | |
861 | if (IS_ERR(inode_fid)) { | |
862 | err = PTR_ERR(inode_fid); | |
863 | mutex_unlock(&v9inode->v_mutex); | |
864 | goto error; | |
865 | } | |
866 | v9inode->writeback_fid = (void *) inode_fid; | |
867 | } | |
868 | mutex_unlock(&v9inode->v_mutex); | |
be12af3e | 869 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 870 | if (err) |
e43ae79c | 871 | goto error; |
e43ae79c | 872 | |
30d90494 | 873 | file->private_data = fid; |
fb89b45c | 874 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
24e42e32 DH |
875 | fscache_use_cookie(v9fs_inode_cookie(v9inode), |
876 | file->f_mode & FMODE_WRITE); | |
987a6485 | 877 | v9fs_open_fid_add(inode, fid); |
e43ae79c | 878 | |
73a09dd9 | 879 | file->f_mode |= FMODE_CREATED; |
e43ae79c MS |
880 | out: |
881 | dput(res); | |
d9585277 | 882 | return err; |
e43ae79c MS |
883 | |
884 | error: | |
885 | if (fid) | |
886 | p9_client_clunk(fid); | |
e43ae79c MS |
887 | goto out; |
888 | } | |
889 | ||
2bad8471 EVH |
890 | /** |
891 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
892 | * @i: inode that is being unlinked | |
73c592b9 | 893 | * @d: dentry that is being unlinked |
2bad8471 EVH |
894 | * |
895 | */ | |
896 | ||
53c06f4e | 897 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
2bad8471 EVH |
898 | { |
899 | return v9fs_remove(i, d, 0); | |
900 | } | |
901 | ||
902 | /** | |
903 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
904 | * @i: inode that is being unlinked | |
73c592b9 | 905 | * @d: dentry that is being unlinked |
2bad8471 EVH |
906 | * |
907 | */ | |
908 | ||
53c06f4e | 909 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
2bad8471 | 910 | { |
48e370ff | 911 | return v9fs_remove(i, d, AT_REMOVEDIR); |
2bad8471 EVH |
912 | } |
913 | ||
914 | /** | |
915 | * v9fs_vfs_rename - VFS hook to rename an inode | |
bc868036 | 916 | * @mnt_userns: The user namespace of the mount |
2bad8471 EVH |
917 | * @old_dir: old dir inode |
918 | * @old_dentry: old dentry | |
919 | * @new_dir: new dir inode | |
920 | * @new_dentry: new dentry | |
bc868036 | 921 | * @flags: RENAME_* flags |
2bad8471 EVH |
922 | * |
923 | */ | |
924 | ||
53c06f4e | 925 | int |
549c7297 CB |
926 | v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir, |
927 | struct dentry *old_dentry, struct inode *new_dir, | |
928 | struct dentry *new_dentry, unsigned int flags) | |
2bad8471 | 929 | { |
d28c61f0 | 930 | int retval; |
bd238fb4 | 931 | struct inode *old_inode; |
b271ec47 | 932 | struct inode *new_inode; |
bd238fb4 | 933 | struct v9fs_session_info *v9ses; |
6636b6dc | 934 | struct p9_fid *oldfid, *dfid; |
bd238fb4 LI |
935 | struct p9_fid *olddirfid; |
936 | struct p9_fid *newdirfid; | |
937 | struct p9_wstat wstat; | |
2bad8471 | 938 | |
1cd66c93 MS |
939 | if (flags) |
940 | return -EINVAL; | |
941 | ||
5d385153 | 942 | p9_debug(P9_DEBUG_VFS, "\n"); |
bd238fb4 | 943 | retval = 0; |
2b0143b5 DH |
944 | old_inode = d_inode(old_dentry); |
945 | new_inode = d_inode(new_dentry); | |
bd238fb4 LI |
946 | v9ses = v9fs_inode2v9ses(old_inode); |
947 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 948 | if (IS_ERR(oldfid)) |
da977b2c EVH |
949 | return PTR_ERR(oldfid); |
950 | ||
6636b6dc JW |
951 | dfid = v9fs_parent_fid(old_dentry); |
952 | olddirfid = clone_fid(dfid); | |
953 | if (dfid && !IS_ERR(dfid)) | |
954 | p9_client_clunk(dfid); | |
955 | ||
ba17674f | 956 | if (IS_ERR(olddirfid)) { |
da977b2c | 957 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 958 | goto done; |
da977b2c EVH |
959 | } |
960 | ||
6636b6dc JW |
961 | dfid = v9fs_parent_fid(new_dentry); |
962 | newdirfid = clone_fid(dfid); | |
963 | p9_client_clunk(dfid); | |
964 | ||
ba17674f | 965 | if (IS_ERR(newdirfid)) { |
da977b2c | 966 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 967 | goto clunk_olddir; |
2bad8471 EVH |
968 | } |
969 | ||
a534c8d1 | 970 | down_write(&v9ses->rename_sem); |
4681dbda | 971 | if (v9fs_proto_dotl(v9ses)) { |
9e8fb38e AK |
972 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
973 | newdirfid, new_dentry->d_name.name); | |
974 | if (retval == -EOPNOTSUPP) | |
975 | retval = p9_client_rename(oldfid, newdirfid, | |
976 | new_dentry->d_name.name); | |
977 | if (retval != -EOPNOTSUPP) | |
4681dbda SK |
978 | goto clunk_newdir; |
979 | } | |
a534c8d1 AK |
980 | if (old_dentry->d_parent != new_dentry->d_parent) { |
981 | /* | |
982 | * 9P .u can only handle file rename in the same directory | |
983 | */ | |
4681dbda | 984 | |
5d385153 | 985 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
621997cd | 986 | retval = -EXDEV; |
bd238fb4 | 987 | goto clunk_newdir; |
2bad8471 | 988 | } |
531b1094 | 989 | v9fs_blank_wstat(&wstat); |
ba17674f | 990 | wstat.muid = v9ses->uname; |
7880b43b | 991 | wstat.name = new_dentry->d_name.name; |
bd238fb4 | 992 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 993 | |
bd238fb4 | 994 | clunk_newdir: |
b271ec47 AK |
995 | if (!retval) { |
996 | if (new_inode) { | |
997 | if (S_ISDIR(new_inode->i_mode)) | |
998 | clear_nlink(new_inode); | |
999 | else | |
ac89b2ef | 1000 | v9fs_dec_count(new_inode); |
b271ec47 AK |
1001 | } |
1002 | if (S_ISDIR(old_inode->i_mode)) { | |
1003 | if (!new_inode) | |
1004 | inc_nlink(new_dir); | |
ac89b2ef | 1005 | v9fs_dec_count(old_dir); |
b271ec47 | 1006 | } |
3bc86de3 | 1007 | v9fs_invalidate_inode_attr(old_inode); |
d28c61f0 AK |
1008 | v9fs_invalidate_inode_attr(old_dir); |
1009 | v9fs_invalidate_inode_attr(new_dir); | |
3bc86de3 | 1010 | |
a534c8d1 AK |
1011 | /* successful rename */ |
1012 | d_move(old_dentry, new_dentry); | |
b271ec47 | 1013 | } |
a534c8d1 | 1014 | up_write(&v9ses->rename_sem); |
22150c4f | 1015 | p9_client_clunk(newdirfid); |
2bad8471 | 1016 | |
bd238fb4 | 1017 | clunk_olddir: |
22150c4f | 1018 | p9_client_clunk(olddirfid); |
da977b2c | 1019 | |
bd238fb4 | 1020 | done: |
6636b6dc | 1021 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1022 | return retval; |
1023 | } | |
1024 | ||
1025 | /** | |
943ffb58 | 1026 | * v9fs_vfs_getattr - retrieve file metadata |
bc868036 | 1027 | * @mnt_userns: The user namespace of the mount |
a528d35e | 1028 | * @path: Object to query |
ee443996 | 1029 | * @stat: metadata structure to populate |
a528d35e DH |
1030 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
1031 | * @flags: AT_STATX_xxx setting | |
2bad8471 EVH |
1032 | * |
1033 | */ | |
1034 | ||
1035 | static int | |
549c7297 CB |
1036 | v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path, |
1037 | struct kstat *stat, u32 request_mask, unsigned int flags) | |
2bad8471 | 1038 | { |
a528d35e | 1039 | struct dentry *dentry = path->dentry; |
bd238fb4 LI |
1040 | struct v9fs_session_info *v9ses; |
1041 | struct p9_fid *fid; | |
51a87c55 | 1042 | struct p9_wstat *st; |
bd238fb4 | 1043 | |
5d385153 | 1044 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 1045 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 | 1046 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
0d56a451 | 1047 | generic_fillattr(&init_user_ns, d_inode(dentry), stat); |
a1211908 AK |
1048 | return 0; |
1049 | } | |
bd238fb4 LI |
1050 | fid = v9fs_fid_lookup(dentry); |
1051 | if (IS_ERR(fid)) | |
da977b2c | 1052 | return PTR_ERR(fid); |
2bad8471 | 1053 | |
bd238fb4 | 1054 | st = p9_client_stat(fid); |
6636b6dc | 1055 | p9_client_clunk(fid); |
bd238fb4 LI |
1056 | if (IS_ERR(st)) |
1057 | return PTR_ERR(st); | |
2bad8471 | 1058 | |
5e3cc1ee | 1059 | v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); |
0d56a451 | 1060 | generic_fillattr(&init_user_ns, d_inode(dentry), stat); |
2bad8471 | 1061 | |
62b2be59 | 1062 | p9stat_free(st); |
bd238fb4 LI |
1063 | kfree(st); |
1064 | return 0; | |
2bad8471 EVH |
1065 | } |
1066 | ||
1067 | /** | |
1068 | * v9fs_vfs_setattr - set file metadata | |
bc868036 | 1069 | * @mnt_userns: The user namespace of the mount |
2bad8471 EVH |
1070 | * @dentry: file whose metadata to set |
1071 | * @iattr: metadata assignment structure | |
1072 | * | |
1073 | */ | |
1074 | ||
549c7297 CB |
1075 | static int v9fs_vfs_setattr(struct user_namespace *mnt_userns, |
1076 | struct dentry *dentry, struct iattr *iattr) | |
2bad8471 | 1077 | { |
6636b6dc | 1078 | int retval, use_dentry = 0; |
24e42e32 DH |
1079 | struct inode *inode = d_inode(dentry); |
1080 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
bd238fb4 | 1081 | struct v9fs_session_info *v9ses; |
66246641 | 1082 | struct p9_fid *fid = NULL; |
bd238fb4 | 1083 | struct p9_wstat wstat; |
2bad8471 | 1084 | |
5d385153 | 1085 | p9_debug(P9_DEBUG_VFS, "\n"); |
2f221d6f | 1086 | retval = setattr_prepare(&init_user_ns, dentry, iattr); |
059c138b AK |
1087 | if (retval) |
1088 | return retval; | |
1089 | ||
bd238fb4 | 1090 | retval = -EPERM; |
42869c8a | 1091 | v9ses = v9fs_dentry2v9ses(dentry); |
66246641 JW |
1092 | if (iattr->ia_valid & ATTR_FILE) { |
1093 | fid = iattr->ia_file->private_data; | |
1094 | WARN_ON(!fid); | |
1095 | } | |
6636b6dc | 1096 | if (!fid) { |
66246641 | 1097 | fid = v9fs_fid_lookup(dentry); |
6636b6dc JW |
1098 | use_dentry = 1; |
1099 | } | |
6e195b0f | 1100 | if (IS_ERR(fid)) |
da977b2c | 1101 | return PTR_ERR(fid); |
2bad8471 | 1102 | |
531b1094 | 1103 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1104 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1105 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1106 | |
1107 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1108 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1109 | |
1110 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1111 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1112 | |
1113 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1114 | wstat.length = iattr->ia_size; |
2bad8471 | 1115 | |
dd6102fb | 1116 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1117 | if (iattr->ia_valid & ATTR_UID) |
1118 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1119 | |
531b1094 LI |
1120 | if (iattr->ia_valid & ATTR_GID) |
1121 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 | 1122 | } |
059c138b | 1123 | |
3dc5436a | 1124 | /* Write all dirty data */ |
e36cb0b8 | 1125 | if (d_is_reg(dentry)) |
24e42e32 | 1126 | filemap_write_and_wait(inode->i_mapping); |
3dc5436a | 1127 | |
f10fc50f | 1128 | retval = p9_client_wstat(fid, &wstat); |
6636b6dc JW |
1129 | |
1130 | if (use_dentry) | |
1131 | p9_client_clunk(fid); | |
1132 | ||
f10fc50f AK |
1133 | if (retval < 0) |
1134 | return retval; | |
059c138b AK |
1135 | |
1136 | if ((iattr->ia_valid & ATTR_SIZE) && | |
24e42e32 DH |
1137 | iattr->ia_size != i_size_read(inode)) { |
1138 | truncate_setsize(inode, iattr->ia_size); | |
1139 | fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); | |
1140 | } | |
059c138b | 1141 | |
24e42e32 | 1142 | v9fs_invalidate_inode_attr(inode); |
2bad8471 | 1143 | |
24e42e32 DH |
1144 | setattr_copy(&init_user_ns, inode, iattr); |
1145 | mark_inode_dirty(inode); | |
1025774c | 1146 | return 0; |
2bad8471 EVH |
1147 | } |
1148 | ||
1149 | /** | |
531b1094 LI |
1150 | * v9fs_stat2inode - populate an inode structure with mistat info |
1151 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1152 | * @inode: inode to populate |
1153 | * @sb: superblock of filesystem | |
5e3cc1ee | 1154 | * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
2bad8471 EVH |
1155 | * |
1156 | */ | |
1157 | ||
1158 | void | |
51a87c55 | 1159 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
5e3cc1ee | 1160 | struct super_block *sb, unsigned int flags) |
2bad8471 | 1161 | { |
3eda0de6 | 1162 | umode_t mode; |
2bad8471 | 1163 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
b3cbea03 | 1164 | struct v9fs_inode *v9inode = V9FS_I(inode); |
2bad8471 | 1165 | |
bfe86848 | 1166 | set_nlink(inode, 1); |
2bad8471 | 1167 | |
531b1094 LI |
1168 | inode->i_atime.tv_sec = stat->atime; |
1169 | inode->i_mtime.tv_sec = stat->mtime; | |
1170 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1171 | |
bd32b82d LI |
1172 | inode->i_uid = v9ses->dfltuid; |
1173 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1174 | |
dd6102fb | 1175 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1176 | inode->i_uid = stat->n_uid; |
1177 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1178 | } |
5717144a | 1179 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
9652c732 AV |
1180 | if (v9fs_proto_dotu(v9ses)) { |
1181 | unsigned int i_nlink; | |
5717144a | 1182 | /* |
9652c732 AV |
1183 | * Hadlink support got added later to the .u extension. |
1184 | * So there can be a server out there that doesn't | |
1185 | * support this even with .u extension. That would | |
1186 | * just leave us with stat->extension being an empty | |
1187 | * string, though. | |
5717144a | 1188 | */ |
5717144a | 1189 | /* HARDLINKCOUNT %u */ |
9652c732 AV |
1190 | if (sscanf(stat->extension, |
1191 | " HARDLINKCOUNT %u", &i_nlink) == 1) | |
bfe86848 | 1192 | set_nlink(inode, i_nlink); |
5717144a AK |
1193 | } |
1194 | } | |
df345c67 | 1195 | mode = p9mode2perm(v9ses, stat); |
45089142 AK |
1196 | mode |= inode->i_mode & ~S_IALLUGO; |
1197 | inode->i_mode = mode; | |
2bad8471 | 1198 | |
5e3cc1ee HT |
1199 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
1200 | v9fs_i_size_write(inode, stat->length); | |
bd238fb4 | 1201 | /* not real number of blocks, but 512 byte ones ... */ |
5e3cc1ee | 1202 | inode->i_blocks = (stat->length + 512 - 1) >> 9; |
b3cbea03 | 1203 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
2bad8471 EVH |
1204 | } |
1205 | ||
1206 | /** | |
1207 | * v9fs_qid2ino - convert qid into inode number | |
1208 | * @qid: qid to hash | |
1209 | * | |
1210 | * BUG: potential for inode number collisions? | |
1211 | */ | |
1212 | ||
bd238fb4 | 1213 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1214 | { |
1215 | u64 path = qid->path + 2; | |
1216 | ino_t i = 0; | |
1217 | ||
1218 | if (sizeof(ino_t) == sizeof(path)) | |
1219 | memcpy(&i, &path, sizeof(ino_t)); | |
1220 | else | |
1221 | i = (ino_t) (path ^ (path >> 32)); | |
1222 | ||
1223 | return i; | |
1224 | } | |
1225 | ||
2bad8471 | 1226 | /** |
6b255391 | 1227 | * v9fs_vfs_get_link - follow a symlink path |
2bad8471 | 1228 | * @dentry: dentry for symlink |
6b255391 | 1229 | * @inode: inode for symlink |
fceef393 | 1230 | * @done: delayed call for when we are done with the return value |
2bad8471 EVH |
1231 | */ |
1232 | ||
6b255391 | 1233 | static const char *v9fs_vfs_get_link(struct dentry *dentry, |
fceef393 AV |
1234 | struct inode *inode, |
1235 | struct delayed_call *done) | |
2bad8471 | 1236 | { |
6b255391 AV |
1237 | struct v9fs_session_info *v9ses; |
1238 | struct p9_fid *fid; | |
51a87c55 | 1239 | struct p9_wstat *st; |
680baacb | 1240 | char *res; |
2bad8471 | 1241 | |
6b255391 AV |
1242 | if (!dentry) |
1243 | return ERR_PTR(-ECHILD); | |
1244 | ||
1245 | v9ses = v9fs_dentry2v9ses(dentry); | |
1246 | fid = v9fs_fid_lookup(dentry); | |
90e4fc88 AV |
1247 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
1248 | ||
ba17674f | 1249 | if (IS_ERR(fid)) |
90e4fc88 | 1250 | return ERR_CAST(fid); |
2bad8471 | 1251 | |
329176cc | 1252 | if (!v9fs_proto_dotu(v9ses)) |
90e4fc88 | 1253 | return ERR_PTR(-EBADF); |
2bad8471 | 1254 | |
bd238fb4 | 1255 | st = p9_client_stat(fid); |
6636b6dc | 1256 | p9_client_clunk(fid); |
bd238fb4 | 1257 | if (IS_ERR(st)) |
90e4fc88 | 1258 | return ERR_CAST(st); |
2bad8471 | 1259 | |
bd238fb4 | 1260 | if (!(st->mode & P9_DMSYMLINK)) { |
90e4fc88 AV |
1261 | p9stat_free(st); |
1262 | kfree(st); | |
1263 | return ERR_PTR(-EINVAL); | |
2bad8471 | 1264 | } |
680baacb | 1265 | res = st->extension; |
90e4fc88 | 1266 | st->extension = NULL; |
680baacb AV |
1267 | if (strlen(res) >= PATH_MAX) |
1268 | res[PATH_MAX - 1] = '\0'; | |
1269 | ||
62b2be59 | 1270 | p9stat_free(st); |
bd238fb4 | 1271 | kfree(st); |
fceef393 AV |
1272 | set_delayed_call(done, kfree_link, res); |
1273 | return res; | |
2bad8471 EVH |
1274 | } |
1275 | ||
ee443996 EVH |
1276 | /** |
1277 | * v9fs_vfs_mkspecial - create a special file | |
1278 | * @dir: inode to create special file in | |
1279 | * @dentry: dentry to create | |
fd2916bd | 1280 | * @perm: mode to create special file |
ee443996 EVH |
1281 | * @extension: 9p2000.u format extension string representing special file |
1282 | * | |
1283 | */ | |
1284 | ||
531b1094 | 1285 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
c2837de7 | 1286 | u32 perm, const char *extension) |
2bad8471 | 1287 | { |
bd238fb4 | 1288 | struct p9_fid *fid; |
d28c61f0 | 1289 | struct v9fs_session_info *v9ses; |
2bad8471 | 1290 | |
6a3124a3 | 1291 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1292 | if (!v9fs_proto_dotu(v9ses)) { |
5d385153 | 1293 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1294 | return -EPERM; |
2bad8471 EVH |
1295 | } |
1296 | ||
bd238fb4 LI |
1297 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1298 | P9_OREAD); | |
1299 | if (IS_ERR(fid)) | |
1300 | return PTR_ERR(fid); | |
da977b2c | 1301 | |
d28c61f0 | 1302 | v9fs_invalidate_inode_attr(dir); |
bd238fb4 | 1303 | p9_client_clunk(fid); |
6a3124a3 | 1304 | return 0; |
531b1094 LI |
1305 | } |
1306 | ||
1307 | /** | |
1308 | * v9fs_vfs_symlink - helper function to create symlinks | |
bc868036 | 1309 | * @mnt_userns: The user namespace of the mount |
531b1094 LI |
1310 | * @dir: directory inode containing symlink |
1311 | * @dentry: dentry for symlink | |
1312 | * @symname: symlink data | |
1313 | * | |
ee443996 | 1314 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1315 | * |
1316 | */ | |
1317 | ||
1318 | static int | |
549c7297 CB |
1319 | v9fs_vfs_symlink(struct user_namespace *mnt_userns, struct inode *dir, |
1320 | struct dentry *dentry, const char *symname) | |
531b1094 | 1321 | { |
4b8e9923 AV |
1322 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", |
1323 | dir->i_ino, dentry, symname); | |
531b1094 | 1324 | |
c2837de7 | 1325 | return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); |
531b1094 LI |
1326 | } |
1327 | ||
b46c267e AV |
1328 | #define U32_MAX_DIGITS 10 |
1329 | ||
531b1094 LI |
1330 | /** |
1331 | * v9fs_vfs_link - create a hardlink | |
1332 | * @old_dentry: dentry for file to link to | |
1333 | * @dir: inode destination for new link | |
1334 | * @dentry: dentry for link | |
1335 | * | |
1336 | */ | |
1337 | ||
531b1094 LI |
1338 | static int |
1339 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1340 | struct dentry *dentry) | |
1341 | { | |
1342 | int retval; | |
b46c267e | 1343 | char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ |
d28c61f0 | 1344 | struct p9_fid *oldfid; |
531b1094 | 1345 | |
4b8e9923 AV |
1346 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", |
1347 | dir->i_ino, dentry, old_dentry); | |
531b1094 | 1348 | |
da977b2c | 1349 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1350 | if (IS_ERR(oldfid)) |
da977b2c | 1351 | return PTR_ERR(oldfid); |
531b1094 | 1352 | |
16cce6d2 | 1353 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1354 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
c06c066a | 1355 | if (!retval) { |
2b0143b5 | 1356 | v9fs_refresh_inode(oldfid, d_inode(old_dentry)); |
d28c61f0 | 1357 | v9fs_invalidate_inode_attr(dir); |
c06c066a | 1358 | } |
bd238fb4 | 1359 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1360 | return retval; |
1361 | } | |
1362 | ||
1363 | /** | |
1364 | * v9fs_vfs_mknod - create a special file | |
bc868036 | 1365 | * @mnt_userns: The user namespace of the mount |
2bad8471 EVH |
1366 | * @dir: inode destination for new link |
1367 | * @dentry: dentry for file | |
1368 | * @mode: mode for creation | |
ee443996 | 1369 | * @rdev: device associated with special file |
2bad8471 EVH |
1370 | * |
1371 | */ | |
1372 | ||
1373 | static int | |
549c7297 CB |
1374 | v9fs_vfs_mknod(struct user_namespace *mnt_userns, struct inode *dir, |
1375 | struct dentry *dentry, umode_t mode, dev_t rdev) | |
2bad8471 | 1376 | { |
c2837de7 | 1377 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
531b1094 | 1378 | int retval; |
b46c267e | 1379 | char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; |
c2837de7 | 1380 | u32 perm; |
2bad8471 | 1381 | |
6e195b0f | 1382 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", |
4b8e9923 | 1383 | dir->i_ino, dentry, mode, |
5d385153 | 1384 | MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1385 | |
2bad8471 EVH |
1386 | /* build extension */ |
1387 | if (S_ISBLK(mode)) | |
531b1094 | 1388 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1389 | else if (S_ISCHR(mode)) |
531b1094 | 1390 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
b46c267e | 1391 | else |
75cc5c9b | 1392 | *name = 0; |
2bad8471 | 1393 | |
c2837de7 AV |
1394 | perm = unixmode2p9mode(v9ses, mode); |
1395 | retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); | |
2bad8471 EVH |
1396 | |
1397 | return retval; | |
1398 | } | |
1399 | ||
b3cbea03 AK |
1400 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
1401 | { | |
45089142 AK |
1402 | int umode; |
1403 | dev_t rdev; | |
b3cbea03 AK |
1404 | struct p9_wstat *st; |
1405 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 1406 | unsigned int flags; |
b3cbea03 AK |
1407 | |
1408 | v9ses = v9fs_inode2v9ses(inode); | |
1409 | st = p9_client_stat(fid); | |
1410 | if (IS_ERR(st)) | |
1411 | return PTR_ERR(st); | |
45089142 AK |
1412 | /* |
1413 | * Don't update inode if the file type is different | |
1414 | */ | |
1415 | umode = p9mode2unixmode(v9ses, st, &rdev); | |
6e3e2c43 | 1416 | if (inode_wrong_type(inode, umode)) |
45089142 | 1417 | goto out; |
b3cbea03 | 1418 | |
b3cbea03 AK |
1419 | /* |
1420 | * We don't want to refresh inode->i_size, | |
1421 | * because we may have cached data | |
1422 | */ | |
5e3cc1ee HT |
1423 | flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? |
1424 | V9FS_STAT2INODE_KEEP_ISIZE : 0; | |
1425 | v9fs_stat2inode(st, inode, inode->i_sb, flags); | |
45089142 | 1426 | out: |
b3cbea03 AK |
1427 | p9stat_free(st); |
1428 | kfree(st); | |
1429 | return 0; | |
1430 | } | |
1431 | ||
9b6533c9 SK |
1432 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1433 | .create = v9fs_vfs_create, | |
1434 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1435 | .atomic_open = v9fs_vfs_atomic_open, |
9b6533c9 | 1436 | .symlink = v9fs_vfs_symlink, |
50cc42ff | 1437 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1438 | .unlink = v9fs_vfs_unlink, |
1439 | .mkdir = v9fs_vfs_mkdir, | |
1440 | .rmdir = v9fs_vfs_rmdir, | |
1d76e313 | 1441 | .mknod = v9fs_vfs_mknod, |
9b6533c9 SK |
1442 | .rename = v9fs_vfs_rename, |
1443 | .getattr = v9fs_vfs_getattr, | |
1444 | .setattr = v9fs_vfs_setattr, | |
1445 | }; | |
1446 | ||
754661f1 | 1447 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1448 | .create = v9fs_vfs_create, |
1449 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1450 | .atomic_open = v9fs_vfs_atomic_open, |
b501611a EVH |
1451 | .unlink = v9fs_vfs_unlink, |
1452 | .mkdir = v9fs_vfs_mkdir, | |
1453 | .rmdir = v9fs_vfs_rmdir, | |
1454 | .mknod = v9fs_vfs_mknod, | |
1455 | .rename = v9fs_vfs_rename, | |
1456 | .getattr = v9fs_vfs_getattr, | |
1457 | .setattr = v9fs_vfs_setattr, | |
1458 | }; | |
1459 | ||
754661f1 | 1460 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1461 | .getattr = v9fs_vfs_getattr, |
1462 | .setattr = v9fs_vfs_setattr, | |
1463 | }; | |
1464 | ||
754661f1 | 1465 | static const struct inode_operations v9fs_symlink_inode_operations = { |
6b255391 | 1466 | .get_link = v9fs_vfs_get_link, |
2bad8471 EVH |
1467 | .getattr = v9fs_vfs_getattr, |
1468 | .setattr = v9fs_vfs_setattr, | |
1469 | }; | |
9b6533c9 | 1470 |