Commit | Line | Data |
---|---|---|
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> | |
e8edc6e0 | 20 | #include <linux/sched.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
ebf46264 | 22 | #include <linux/xattr.h> |
85ff872d | 23 | #include <linux/posix_acl.h> |
bd238fb4 LI |
24 | #include <net/9p/9p.h> |
25 | #include <net/9p/client.h> | |
2bad8471 | 26 | |
2bad8471 | 27 | #include "v9fs.h" |
2bad8471 | 28 | #include "v9fs_vfs.h" |
2bad8471 | 29 | #include "fid.h" |
60e78d2c | 30 | #include "cache.h" |
ebf46264 | 31 | #include "xattr.h" |
85ff872d | 32 | #include "acl.h" |
2bad8471 | 33 | |
754661f1 | 34 | static const struct inode_operations v9fs_dir_inode_operations; |
9b6533c9 | 35 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
754661f1 AV |
36 | static const struct inode_operations v9fs_file_inode_operations; |
37 | static const struct inode_operations v9fs_symlink_inode_operations; | |
f5fc6145 | 38 | |
2bad8471 EVH |
39 | /** |
40 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
41 | * @v9ses: v9fs session information | |
42 | * @mode: mode to convert | |
43 | * | |
44 | */ | |
45 | ||
3eda0de6 | 46 | static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) |
2bad8471 EVH |
47 | { |
48 | int res; | |
6e195b0f | 49 | |
2bad8471 EVH |
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; |
6e195b0f | 229 | |
fd60b288 | 230 | v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); |
a78ce05d | 231 | if (!v9inode) |
60e78d2c | 232 | return NULL; |
b3cbea03 | 233 | v9inode->cache_validity = 0; |
5a7e0a8c | 234 | mutex_init(&v9inode->v_mutex); |
874c8ca1 | 235 | return &v9inode->netfs.inode; |
60e78d2c AK |
236 | } |
237 | ||
238 | /** | |
5e8a0770 | 239 | * v9fs_free_inode - destroy an inode |
bc868036 | 240 | * @inode: The inode to be freed |
60e78d2c AK |
241 | */ |
242 | ||
5e8a0770 | 243 | void v9fs_free_inode(struct inode *inode) |
60e78d2c | 244 | { |
a78ce05d | 245 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
60e78d2c | 246 | } |
fa0d7e3d | 247 | |
bc899ee1 DH |
248 | /* |
249 | * Set parameters for the netfs library | |
250 | */ | |
251 | static void v9fs_set_netfs_context(struct inode *inode) | |
252 | { | |
e81fb419 LT |
253 | struct v9fs_inode *v9inode = V9FS_I(inode); |
254 | netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); | |
bc899ee1 DH |
255 | } |
256 | ||
5ffc0cb3 | 257 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
3eda0de6 | 258 | struct inode *inode, umode_t mode, dev_t rdev) |
2bad8471 | 259 | { |
5ffc0cb3 | 260 | int err = 0; |
2bb54115 | 261 | |
f2d40141 | 262 | inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); |
2bb54115 | 263 | inode->i_blocks = 0; |
45089142 | 264 | inode->i_rdev = rdev; |
078cd827 | 265 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
2bb54115 | 266 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
987a6485 | 267 | inode->i_private = NULL; |
2bb54115 AK |
268 | |
269 | switch (mode & S_IFMT) { | |
270 | case S_IFIFO: | |
271 | case S_IFBLK: | |
272 | case S_IFCHR: | |
273 | case S_IFSOCK: | |
4b43516a MK |
274 | if (v9fs_proto_dotl(v9ses)) { |
275 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
4b43516a MK |
276 | } else if (v9fs_proto_dotu(v9ses)) { |
277 | inode->i_op = &v9fs_file_inode_operations; | |
4b43516a | 278 | } else { |
5d385153 JP |
279 | p9_debug(P9_DEBUG_ERROR, |
280 | "special files without extended mode\n"); | |
2bb54115 AK |
281 | err = -EINVAL; |
282 | goto error; | |
2bad8471 | 283 | } |
2bb54115 AK |
284 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
285 | break; | |
286 | case S_IFREG: | |
9b6533c9 SK |
287 | if (v9fs_proto_dotl(v9ses)) { |
288 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
d9bc0d11 | 289 | inode->i_fop = &v9fs_file_operations_dotl; |
9b6533c9 SK |
290 | } else { |
291 | inode->i_op = &v9fs_file_inode_operations; | |
d9bc0d11 | 292 | inode->i_fop = &v9fs_file_operations; |
9b6533c9 SK |
293 | } |
294 | ||
2bb54115 AK |
295 | break; |
296 | case S_IFLNK: | |
9b6533c9 | 297 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
5d385153 JP |
298 | p9_debug(P9_DEBUG_ERROR, |
299 | "extended modes used with legacy protocol\n"); | |
2bb54115 AK |
300 | err = -EINVAL; |
301 | goto error; | |
302 | } | |
9b6533c9 SK |
303 | |
304 | if (v9fs_proto_dotl(v9ses)) | |
305 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
306 | else | |
307 | inode->i_op = &v9fs_symlink_inode_operations; | |
308 | ||
2bb54115 AK |
309 | break; |
310 | case S_IFDIR: | |
311 | inc_nlink(inode); | |
9b6533c9 SK |
312 | if (v9fs_proto_dotl(v9ses)) |
313 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
314 | else if (v9fs_proto_dotu(v9ses)) | |
315 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
316 | else |
317 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
318 | |
319 | if (v9fs_proto_dotl(v9ses)) | |
320 | inode->i_fop = &v9fs_dir_operations_dotl; | |
321 | else | |
322 | inode->i_fop = &v9fs_dir_operations; | |
323 | ||
2bb54115 AK |
324 | break; |
325 | default: | |
609eac1c | 326 | p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", |
5d385153 | 327 | mode, mode & S_IFMT); |
2bb54115 AK |
328 | err = -EINVAL; |
329 | goto error; | |
2bad8471 | 330 | } |
bc899ee1 DH |
331 | |
332 | v9fs_set_netfs_context(inode); | |
5ffc0cb3 AK |
333 | error: |
334 | return err; | |
2bb54115 | 335 | |
5ffc0cb3 | 336 | } |
2bb54115 | 337 | |
5ffc0cb3 AK |
338 | /** |
339 | * v9fs_get_inode - helper function to setup an inode | |
340 | * @sb: superblock | |
341 | * @mode: mode to setup inode with | |
bc868036 | 342 | * @rdev: The device numbers to set |
5ffc0cb3 AK |
343 | */ |
344 | ||
3eda0de6 | 345 | struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) |
5ffc0cb3 AK |
346 | { |
347 | int err; | |
348 | struct inode *inode; | |
349 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
350 | ||
609eac1c | 351 | p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); |
5ffc0cb3 AK |
352 | |
353 | inode = new_inode(sb); | |
354 | if (!inode) { | |
5d385153 JP |
355 | pr_warn("%s (%d): Problem allocating inode\n", |
356 | __func__, task_pid_nr(current)); | |
5ffc0cb3 AK |
357 | return ERR_PTR(-ENOMEM); |
358 | } | |
45089142 | 359 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
5ffc0cb3 AK |
360 | if (err) { |
361 | iput(inode); | |
362 | return ERR_PTR(err); | |
363 | } | |
364 | return inode; | |
2bad8471 EVH |
365 | } |
366 | ||
60e78d2c | 367 | /** |
bc868036 | 368 | * v9fs_evict_inode - Remove an inode from the inode cache |
60e78d2c AK |
369 | * @inode: inode to release |
370 | * | |
371 | */ | |
b57922d9 | 372 | void v9fs_evict_inode(struct inode *inode) |
60e78d2c | 373 | { |
4eb31178 EVH |
374 | struct v9fs_inode __maybe_unused *v9inode = V9FS_I(inode); |
375 | __le32 __maybe_unused version; | |
6b39f6d2 | 376 | |
4ad78628 | 377 | truncate_inode_pages_final(&inode->i_data); |
4eb31178 EVH |
378 | |
379 | #ifdef CONFIG_9P_FSCACHE | |
93c84614 DH |
380 | version = cpu_to_le32(v9inode->qid.version); |
381 | fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, | |
382 | &version); | |
4eb31178 EVH |
383 | #endif |
384 | ||
dbd5768f | 385 | clear_inode(inode); |
4ad78628 | 386 | filemap_fdatawrite(&inode->i_data); |
60e78d2c | 387 | |
4eb31178 | 388 | #ifdef CONFIG_9P_FSCACHE |
24e42e32 | 389 | fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); |
4eb31178 | 390 | #endif |
60e78d2c AK |
391 | } |
392 | ||
fd2421f5 AK |
393 | static int v9fs_test_inode(struct inode *inode, void *data) |
394 | { | |
395 | int umode; | |
45089142 | 396 | dev_t rdev; |
fd2421f5 AK |
397 | struct v9fs_inode *v9inode = V9FS_I(inode); |
398 | struct p9_wstat *st = (struct p9_wstat *)data; | |
399 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); | |
400 | ||
45089142 | 401 | umode = p9mode2unixmode(v9ses, st, &rdev); |
fd2421f5 | 402 | /* don't match inode of different type */ |
6e3e2c43 | 403 | if (inode_wrong_type(inode, umode)) |
fd2421f5 AK |
404 | return 0; |
405 | ||
406 | /* compare qid details */ | |
407 | if (memcmp(&v9inode->qid.version, | |
408 | &st->qid.version, sizeof(v9inode->qid.version))) | |
409 | return 0; | |
410 | ||
411 | if (v9inode->qid.type != st->qid.type) | |
412 | return 0; | |
8ee03163 TT |
413 | |
414 | if (v9inode->qid.path != st->qid.path) | |
415 | return 0; | |
fd2421f5 AK |
416 | return 1; |
417 | } | |
418 | ||
ed80fcfa AK |
419 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
420 | { | |
421 | return 0; | |
422 | } | |
423 | ||
fd2421f5 AK |
424 | static int v9fs_set_inode(struct inode *inode, void *data) |
425 | { | |
426 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
427 | struct p9_wstat *st = (struct p9_wstat *)data; | |
428 | ||
429 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
430 | return 0; | |
431 | } | |
432 | ||
5ffc0cb3 AK |
433 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
434 | struct p9_qid *qid, | |
ed80fcfa AK |
435 | struct p9_wstat *st, |
436 | int new) | |
6a3124a3 | 437 | { |
45089142 | 438 | dev_t rdev; |
3eda0de6 AV |
439 | int retval; |
440 | umode_t umode; | |
5ffc0cb3 AK |
441 | unsigned long i_ino; |
442 | struct inode *inode; | |
443 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
6e195b0f | 444 | int (*test)(struct inode *inode, void *data); |
ed80fcfa AK |
445 | |
446 | if (new) | |
447 | test = v9fs_test_new_inode; | |
448 | else | |
449 | test = v9fs_test_inode; | |
2bad8471 | 450 | |
5ffc0cb3 | 451 | i_ino = v9fs_qid2ino(qid); |
ed80fcfa | 452 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); |
5ffc0cb3 AK |
453 | if (!inode) |
454 | return ERR_PTR(-ENOMEM); | |
455 | if (!(inode->i_state & I_NEW)) | |
456 | return inode; | |
457 | /* | |
458 | * initialize the inode with the stat info | |
459 | * FIXME!! we may need support for stale inodes | |
460 | * later. | |
461 | */ | |
fd2421f5 | 462 | inode->i_ino = i_ino; |
45089142 AK |
463 | umode = p9mode2unixmode(v9ses, st, &rdev); |
464 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); | |
5ffc0cb3 | 465 | if (retval) |
6a3124a3 | 466 | goto error; |
60e78d2c | 467 | |
5e3cc1ee | 468 | v9fs_stat2inode(st, inode, sb, 0); |
5ffc0cb3 | 469 | v9fs_cache_inode_get_cookie(inode); |
5ffc0cb3 AK |
470 | unlock_new_inode(inode); |
471 | return inode; | |
6a3124a3 | 472 | error: |
0a73d0a2 | 473 | iget_failed(inode); |
5ffc0cb3 AK |
474 | return ERR_PTR(retval); |
475 | ||
476 | } | |
477 | ||
478 | struct inode * | |
a78ce05d | 479 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 480 | struct super_block *sb, int new) |
5ffc0cb3 AK |
481 | { |
482 | struct p9_wstat *st; | |
483 | struct inode *inode = NULL; | |
484 | ||
485 | st = p9_client_stat(fid); | |
486 | if (IS_ERR(st)) | |
487 | return ERR_CAST(st); | |
488 | ||
ed80fcfa | 489 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
02bc3567 | 490 | p9stat_free(st); |
bd238fb4 | 491 | kfree(st); |
5ffc0cb3 | 492 | return inode; |
2bad8471 EVH |
493 | } |
494 | ||
f88657ce AK |
495 | /** |
496 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to | |
497 | * plan 9 AT flag. | |
498 | * @flags: flags to convert | |
499 | */ | |
500 | static int v9fs_at_to_dotl_flags(int flags) | |
501 | { | |
502 | int rflags = 0; | |
6e195b0f | 503 | |
f88657ce AK |
504 | if (flags & AT_REMOVEDIR) |
505 | rflags |= P9_DOTL_AT_REMOVEDIR; | |
6e195b0f | 506 | |
f88657ce AK |
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)); | |
b48dbb99 | 557 | p9_fid_put(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); |
dafbe689 | 621 | goto error; |
bd238fb4 | 622 | } |
6a3124a3 | 623 | |
bd238fb4 | 624 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 | 625 | if (err < 0) { |
5d385153 | 626 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
6a3124a3 | 627 | goto error; |
6d27e64d | 628 | } |
6a3124a3 | 629 | |
b6054793 AK |
630 | if (!(perm & P9_DMLINK)) { |
631 | /* now walk from the parent so we can get unopened fid */ | |
632 | fid = p9_client_walk(dfid, 1, &name, 1); | |
633 | if (IS_ERR(fid)) { | |
634 | err = PTR_ERR(fid); | |
635 | p9_debug(P9_DEBUG_VFS, | |
636 | "p9_client_walk failed %d\n", err); | |
b6054793 AK |
637 | goto error; |
638 | } | |
639 | /* | |
640 | * instantiate inode and assign the unopened fid to the dentry | |
641 | */ | |
642 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
643 | if (IS_ERR(inode)) { | |
644 | err = PTR_ERR(inode); | |
645 | p9_debug(P9_DEBUG_VFS, | |
646 | "inode creation failed %d\n", err); | |
647 | goto error; | |
648 | } | |
dafbe689 | 649 | v9fs_fid_add(dentry, &fid); |
b6054793 | 650 | d_instantiate(dentry, inode); |
6a3124a3 | 651 | } |
b48dbb99 | 652 | p9_fid_put(dfid); |
bd238fb4 | 653 | return ofid; |
bd238fb4 | 654 | error: |
dafbe689 DM |
655 | p9_fid_put(dfid); |
656 | p9_fid_put(ofid); | |
657 | p9_fid_put(fid); | |
bd238fb4 LI |
658 | return ERR_PTR(err); |
659 | } | |
660 | ||
661 | /** | |
e43ae79c | 662 | * v9fs_vfs_create - VFS hook to create a regular file |
6c960e68 | 663 | * @idmap: idmap of the mount |
bc868036 DH |
664 | * @dir: The parent directory |
665 | * @dentry: The name of file to be created | |
666 | * @mode: The UNIX file mode to set | |
667 | * @excl: True if the file must not yet exist | |
e43ae79c MS |
668 | * |
669 | * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called | |
670 | * for mknod(2). | |
671 | * | |
bd238fb4 | 672 | */ |
6a3124a3 | 673 | |
bd238fb4 | 674 | static int |
6c960e68 | 675 | v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 676 | struct dentry *dentry, umode_t mode, bool excl) |
bd238fb4 | 677 | { |
e43ae79c MS |
678 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
679 | u32 perm = unixmode2p9mode(v9ses, mode); | |
680 | struct p9_fid *fid; | |
bd238fb4 | 681 | |
e43ae79c MS |
682 | /* P9_OEXCL? */ |
683 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); | |
684 | if (IS_ERR(fid)) | |
685 | return PTR_ERR(fid); | |
bd238fb4 | 686 | |
d28c61f0 | 687 | v9fs_invalidate_inode_attr(dir); |
b48dbb99 | 688 | p9_fid_put(fid); |
6a3124a3 LI |
689 | |
690 | return 0; | |
2bad8471 EVH |
691 | } |
692 | ||
693 | /** | |
694 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
c54bd91e | 695 | * @idmap: idmap of the mount |
ee443996 | 696 | * @dir: inode that is being unlinked |
2bad8471 EVH |
697 | * @dentry: dentry that is being unlinked |
698 | * @mode: mode for new directory | |
699 | * | |
700 | */ | |
701 | ||
c54bd91e | 702 | static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 703 | struct dentry *dentry, umode_t mode) |
2bad8471 | 704 | { |
6a3124a3 | 705 | int err; |
bd238fb4 | 706 | u32 perm; |
bd238fb4 | 707 | struct p9_fid *fid; |
d28c61f0 | 708 | struct v9fs_session_info *v9ses; |
6a3124a3 | 709 | |
4b8e9923 | 710 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
bd238fb4 | 711 | err = 0; |
6a3124a3 | 712 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 713 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
714 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
715 | if (IS_ERR(fid)) { | |
716 | err = PTR_ERR(fid); | |
717 | fid = NULL; | |
d28c61f0 | 718 | } else { |
b271ec47 | 719 | inc_nlink(dir); |
d28c61f0 AK |
720 | v9fs_invalidate_inode_attr(dir); |
721 | } | |
6a3124a3 | 722 | |
bd238fb4 | 723 | if (fid) |
b48dbb99 | 724 | p9_fid_put(fid); |
6a3124a3 | 725 | |
6a3124a3 | 726 | return err; |
2bad8471 EVH |
727 | } |
728 | ||
729 | /** | |
730 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
731 | * @dir: inode that is being walked from | |
732 | * @dentry: dentry that is being walked to? | |
fd2916bd | 733 | * @flags: lookup flags (unused) |
2bad8471 EVH |
734 | * |
735 | */ | |
736 | ||
53c06f4e | 737 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 738 | unsigned int flags) |
2bad8471 | 739 | { |
73f50717 | 740 | struct dentry *res; |
2bad8471 | 741 | struct v9fs_session_info *v9ses; |
bd238fb4 | 742 | struct p9_fid *dfid, *fid; |
2bad8471 | 743 | struct inode *inode; |
7880b43b | 744 | const unsigned char *name; |
2bad8471 | 745 | |
4b8e9923 AV |
746 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", |
747 | dir, dentry, dentry, flags); | |
2bad8471 | 748 | |
11e9b49b SK |
749 | if (dentry->d_name.len > NAME_MAX) |
750 | return ERR_PTR(-ENAMETOOLONG); | |
751 | ||
2bad8471 | 752 | v9ses = v9fs_inode2v9ses(dir); |
a534c8d1 | 753 | /* We can walk d_parent because we hold the dir->i_mutex */ |
77d5a6b7 | 754 | dfid = v9fs_parent_fid(dentry); |
bd238fb4 | 755 | if (IS_ERR(dfid)) |
e231c2ee | 756 | return ERR_CAST(dfid); |
bd238fb4 | 757 | |
73f50717 AK |
758 | /* |
759 | * Make sure we don't use a wrong inode due to parallel | |
760 | * unlink. For cached mode create calls request for new | |
761 | * inode. But with cache disabled, lookup should do this. | |
762 | */ | |
500e2ab6 AV |
763 | name = dentry->d_name.name; |
764 | fid = p9_client_walk(dfid, 1, &name, 1); | |
b48dbb99 | 765 | p9_fid_put(dfid); |
500e2ab6 AV |
766 | if (fid == ERR_PTR(-ENOENT)) |
767 | inode = NULL; | |
768 | else if (IS_ERR(fid)) | |
769 | inode = ERR_CAST(fid); | |
4eb31178 | 770 | else if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) |
73f50717 AK |
771 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
772 | else | |
773 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
73f50717 AK |
774 | /* |
775 | * If we had a rename on the server and a parallel lookup | |
776 | * for the new name, then make sure we instantiate with | |
777 | * the new name. ie look up for a/b, while on server somebody | |
778 | * moved b under k and client parallely did a lookup for | |
779 | * k/b. | |
780 | */ | |
41d28bca | 781 | res = d_splice_alias(inode, dentry); |
500e2ab6 AV |
782 | if (!IS_ERR(fid)) { |
783 | if (!res) | |
dafbe689 | 784 | v9fs_fid_add(dentry, &fid); |
500e2ab6 | 785 | else if (!IS_ERR(res)) |
dafbe689 | 786 | v9fs_fid_add(res, &fid); |
500e2ab6 | 787 | else |
b48dbb99 | 788 | p9_fid_put(fid); |
500e2ab6 | 789 | } |
7b5be621 | 790 | return res; |
2bad8471 EVH |
791 | } |
792 | ||
d9585277 | 793 | static int |
e43ae79c | 794 | v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, |
6e195b0f | 795 | struct file *file, unsigned int flags, umode_t mode) |
e43ae79c MS |
796 | { |
797 | int err; | |
798 | u32 perm; | |
4eb31178 | 799 | struct v9fs_inode __maybe_unused *v9inode; |
e43ae79c | 800 | struct v9fs_session_info *v9ses; |
1543b4c5 | 801 | struct p9_fid *fid; |
e43ae79c | 802 | struct dentry *res = NULL; |
987a6485 | 803 | struct inode *inode; |
1543b4c5 | 804 | int p9_omode; |
e43ae79c | 805 | |
00699ad8 | 806 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 807 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 808 | if (IS_ERR(res)) |
d9585277 | 809 | return PTR_ERR(res); |
e43ae79c MS |
810 | |
811 | if (res) | |
812 | dentry = res; | |
813 | } | |
814 | ||
815 | /* Only creates */ | |
2b0143b5 | 816 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
e45198a6 | 817 | return finish_no_open(file, res); |
e43ae79c MS |
818 | |
819 | err = 0; | |
fae74696 | 820 | |
e43ae79c MS |
821 | v9ses = v9fs_inode2v9ses(dir); |
822 | perm = unixmode2p9mode(v9ses, mode); | |
1543b4c5 EVH |
823 | p9_omode = v9fs_uflags2omode(flags, v9fs_proto_dotu(v9ses)); |
824 | ||
4eb31178 | 825 | if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { |
21e26d5e | 826 | p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR; |
1543b4c5 EVH |
827 | p9_debug(P9_DEBUG_CACHE, |
828 | "write-only file with writeback enabled, creating w/ O_RDWR\n"); | |
829 | } | |
830 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, p9_omode); | |
e43ae79c MS |
831 | if (IS_ERR(fid)) { |
832 | err = PTR_ERR(fid); | |
e43ae79c MS |
833 | goto error; |
834 | } | |
835 | ||
836 | v9fs_invalidate_inode_attr(dir); | |
987a6485 GK |
837 | inode = d_inode(dentry); |
838 | v9inode = V9FS_I(inode); | |
be12af3e | 839 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 840 | if (err) |
e43ae79c | 841 | goto error; |
e43ae79c | 842 | |
30d90494 | 843 | file->private_data = fid; |
4eb31178 EVH |
844 | #ifdef CONFIG_9P_FSCACHE |
845 | if (v9ses->cache & CACHE_FSCACHE) | |
24e42e32 DH |
846 | fscache_use_cookie(v9fs_inode_cookie(v9inode), |
847 | file->f_mode & FMODE_WRITE); | |
4eb31178 | 848 | #endif |
1543b4c5 EVH |
849 | |
850 | v9fs_fid_add_modes(fid, v9ses->flags, v9ses->cache, file->f_flags); | |
dafbe689 | 851 | v9fs_open_fid_add(inode, &fid); |
e43ae79c | 852 | |
73a09dd9 | 853 | file->f_mode |= FMODE_CREATED; |
e43ae79c MS |
854 | out: |
855 | dput(res); | |
d9585277 | 856 | return err; |
e43ae79c MS |
857 | |
858 | error: | |
dafbe689 | 859 | p9_fid_put(fid); |
e43ae79c MS |
860 | goto out; |
861 | } | |
862 | ||
2bad8471 EVH |
863 | /** |
864 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
865 | * @i: inode that is being unlinked | |
73c592b9 | 866 | * @d: dentry that is being unlinked |
2bad8471 EVH |
867 | * |
868 | */ | |
869 | ||
53c06f4e | 870 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
2bad8471 EVH |
871 | { |
872 | return v9fs_remove(i, d, 0); | |
873 | } | |
874 | ||
875 | /** | |
876 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
877 | * @i: inode that is being unlinked | |
73c592b9 | 878 | * @d: dentry that is being unlinked |
2bad8471 EVH |
879 | * |
880 | */ | |
881 | ||
53c06f4e | 882 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
2bad8471 | 883 | { |
48e370ff | 884 | return v9fs_remove(i, d, AT_REMOVEDIR); |
2bad8471 EVH |
885 | } |
886 | ||
887 | /** | |
888 | * v9fs_vfs_rename - VFS hook to rename an inode | |
e18275ae | 889 | * @idmap: The idmap of the mount |
2bad8471 EVH |
890 | * @old_dir: old dir inode |
891 | * @old_dentry: old dentry | |
892 | * @new_dir: new dir inode | |
893 | * @new_dentry: new dentry | |
bc868036 | 894 | * @flags: RENAME_* flags |
2bad8471 EVH |
895 | * |
896 | */ | |
897 | ||
53c06f4e | 898 | int |
e18275ae | 899 | v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, |
549c7297 CB |
900 | struct dentry *old_dentry, struct inode *new_dir, |
901 | struct dentry *new_dentry, unsigned int flags) | |
2bad8471 | 902 | { |
d28c61f0 | 903 | int retval; |
bd238fb4 | 904 | struct inode *old_inode; |
b271ec47 | 905 | struct inode *new_inode; |
bd238fb4 | 906 | struct v9fs_session_info *v9ses; |
dafbe689 DM |
907 | struct p9_fid *oldfid = NULL, *dfid = NULL; |
908 | struct p9_fid *olddirfid = NULL; | |
909 | struct p9_fid *newdirfid = NULL; | |
bd238fb4 | 910 | struct p9_wstat wstat; |
2bad8471 | 911 | |
1cd66c93 MS |
912 | if (flags) |
913 | return -EINVAL; | |
914 | ||
5d385153 | 915 | p9_debug(P9_DEBUG_VFS, "\n"); |
bd238fb4 | 916 | retval = 0; |
2b0143b5 DH |
917 | old_inode = d_inode(old_dentry); |
918 | new_inode = d_inode(new_dentry); | |
bd238fb4 LI |
919 | v9ses = v9fs_inode2v9ses(old_inode); |
920 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 921 | if (IS_ERR(oldfid)) |
da977b2c EVH |
922 | return PTR_ERR(oldfid); |
923 | ||
6636b6dc JW |
924 | dfid = v9fs_parent_fid(old_dentry); |
925 | olddirfid = clone_fid(dfid); | |
dafbe689 DM |
926 | p9_fid_put(dfid); |
927 | dfid = NULL; | |
6636b6dc | 928 | |
ba17674f | 929 | if (IS_ERR(olddirfid)) { |
da977b2c | 930 | retval = PTR_ERR(olddirfid); |
dafbe689 | 931 | goto error; |
da977b2c EVH |
932 | } |
933 | ||
6636b6dc JW |
934 | dfid = v9fs_parent_fid(new_dentry); |
935 | newdirfid = clone_fid(dfid); | |
b48dbb99 | 936 | p9_fid_put(dfid); |
dafbe689 | 937 | dfid = NULL; |
6636b6dc | 938 | |
ba17674f | 939 | if (IS_ERR(newdirfid)) { |
da977b2c | 940 | retval = PTR_ERR(newdirfid); |
dafbe689 | 941 | goto error; |
2bad8471 EVH |
942 | } |
943 | ||
a534c8d1 | 944 | down_write(&v9ses->rename_sem); |
4681dbda | 945 | if (v9fs_proto_dotl(v9ses)) { |
9e8fb38e AK |
946 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
947 | newdirfid, new_dentry->d_name.name); | |
948 | if (retval == -EOPNOTSUPP) | |
949 | retval = p9_client_rename(oldfid, newdirfid, | |
950 | new_dentry->d_name.name); | |
951 | if (retval != -EOPNOTSUPP) | |
dafbe689 | 952 | goto error_locked; |
4681dbda | 953 | } |
a534c8d1 AK |
954 | if (old_dentry->d_parent != new_dentry->d_parent) { |
955 | /* | |
956 | * 9P .u can only handle file rename in the same directory | |
957 | */ | |
4681dbda | 958 | |
5d385153 | 959 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
621997cd | 960 | retval = -EXDEV; |
dafbe689 | 961 | goto error_locked; |
2bad8471 | 962 | } |
531b1094 | 963 | v9fs_blank_wstat(&wstat); |
ba17674f | 964 | wstat.muid = v9ses->uname; |
7880b43b | 965 | wstat.name = new_dentry->d_name.name; |
bd238fb4 | 966 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 967 | |
dafbe689 | 968 | error_locked: |
b271ec47 AK |
969 | if (!retval) { |
970 | if (new_inode) { | |
971 | if (S_ISDIR(new_inode->i_mode)) | |
972 | clear_nlink(new_inode); | |
973 | else | |
ac89b2ef | 974 | v9fs_dec_count(new_inode); |
b271ec47 AK |
975 | } |
976 | if (S_ISDIR(old_inode->i_mode)) { | |
977 | if (!new_inode) | |
978 | inc_nlink(new_dir); | |
ac89b2ef | 979 | v9fs_dec_count(old_dir); |
b271ec47 | 980 | } |
3bc86de3 | 981 | v9fs_invalidate_inode_attr(old_inode); |
d28c61f0 AK |
982 | v9fs_invalidate_inode_attr(old_dir); |
983 | v9fs_invalidate_inode_attr(new_dir); | |
3bc86de3 | 984 | |
a534c8d1 AK |
985 | /* successful rename */ |
986 | d_move(old_dentry, new_dentry); | |
b271ec47 | 987 | } |
a534c8d1 | 988 | up_write(&v9ses->rename_sem); |
2bad8471 | 989 | |
dafbe689 DM |
990 | error: |
991 | p9_fid_put(newdirfid); | |
b48dbb99 | 992 | p9_fid_put(olddirfid); |
b48dbb99 | 993 | p9_fid_put(oldfid); |
2bad8471 EVH |
994 | return retval; |
995 | } | |
996 | ||
997 | /** | |
943ffb58 | 998 | * v9fs_vfs_getattr - retrieve file metadata |
b74d24f7 | 999 | * @idmap: idmap of the mount |
a528d35e | 1000 | * @path: Object to query |
ee443996 | 1001 | * @stat: metadata structure to populate |
a528d35e DH |
1002 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
1003 | * @flags: AT_STATX_xxx setting | |
2bad8471 EVH |
1004 | * |
1005 | */ | |
1006 | ||
1007 | static int | |
b74d24f7 | 1008 | v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, |
549c7297 | 1009 | struct kstat *stat, u32 request_mask, unsigned int flags) |
2bad8471 | 1010 | { |
a528d35e | 1011 | struct dentry *dentry = path->dentry; |
d9bc0d11 | 1012 | struct inode *inode = d_inode(dentry); |
bd238fb4 LI |
1013 | struct v9fs_session_info *v9ses; |
1014 | struct p9_fid *fid; | |
51a87c55 | 1015 | struct p9_wstat *st; |
bd238fb4 | 1016 | |
5d385153 | 1017 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 1018 | v9ses = v9fs_dentry2v9ses(dentry); |
4eb31178 | 1019 | if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { |
1543b4c5 | 1020 | generic_fillattr(&nop_mnt_idmap, inode, stat); |
a1211908 | 1021 | return 0; |
4eb31178 | 1022 | } else if (v9ses->cache & CACHE_WRITEBACK) { |
d9bc0d11 EVH |
1023 | if (S_ISREG(inode->i_mode)) { |
1024 | int retval = filemap_fdatawrite(inode->i_mapping); | |
1025 | ||
1026 | if (retval) | |
1027 | p9_debug(P9_DEBUG_ERROR, | |
1028 | "flushing writeback during getattr returned %d\n", retval); | |
1029 | } | |
a1211908 | 1030 | } |
bd238fb4 LI |
1031 | fid = v9fs_fid_lookup(dentry); |
1032 | if (IS_ERR(fid)) | |
da977b2c | 1033 | return PTR_ERR(fid); |
2bad8471 | 1034 | |
bd238fb4 | 1035 | st = p9_client_stat(fid); |
b48dbb99 | 1036 | p9_fid_put(fid); |
bd238fb4 LI |
1037 | if (IS_ERR(st)) |
1038 | return PTR_ERR(st); | |
2bad8471 | 1039 | |
5e3cc1ee | 1040 | v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); |
b74d24f7 | 1041 | generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); |
2bad8471 | 1042 | |
62b2be59 | 1043 | p9stat_free(st); |
bd238fb4 LI |
1044 | kfree(st); |
1045 | return 0; | |
2bad8471 EVH |
1046 | } |
1047 | ||
1048 | /** | |
1049 | * v9fs_vfs_setattr - set file metadata | |
c1632a0f | 1050 | * @idmap: idmap of the mount |
2bad8471 EVH |
1051 | * @dentry: file whose metadata to set |
1052 | * @iattr: metadata assignment structure | |
1053 | * | |
1054 | */ | |
1055 | ||
c1632a0f | 1056 | static int v9fs_vfs_setattr(struct mnt_idmap *idmap, |
549c7297 | 1057 | struct dentry *dentry, struct iattr *iattr) |
2bad8471 | 1058 | { |
6636b6dc | 1059 | int retval, use_dentry = 0; |
24e42e32 | 1060 | struct inode *inode = d_inode(dentry); |
bd238fb4 | 1061 | struct v9fs_session_info *v9ses; |
66246641 | 1062 | struct p9_fid *fid = NULL; |
bd238fb4 | 1063 | struct p9_wstat wstat; |
2bad8471 | 1064 | |
5d385153 | 1065 | p9_debug(P9_DEBUG_VFS, "\n"); |
c1632a0f | 1066 | retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); |
059c138b AK |
1067 | if (retval) |
1068 | return retval; | |
1069 | ||
bd238fb4 | 1070 | retval = -EPERM; |
42869c8a | 1071 | v9ses = v9fs_dentry2v9ses(dentry); |
66246641 JW |
1072 | if (iattr->ia_valid & ATTR_FILE) { |
1073 | fid = iattr->ia_file->private_data; | |
1074 | WARN_ON(!fid); | |
1075 | } | |
6636b6dc | 1076 | if (!fid) { |
66246641 | 1077 | fid = v9fs_fid_lookup(dentry); |
6636b6dc JW |
1078 | use_dentry = 1; |
1079 | } | |
6e195b0f | 1080 | if (IS_ERR(fid)) |
da977b2c | 1081 | return PTR_ERR(fid); |
2bad8471 | 1082 | |
531b1094 | 1083 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1084 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1085 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1086 | |
1087 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1088 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1089 | |
1090 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1091 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1092 | |
1093 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1094 | wstat.length = iattr->ia_size; |
2bad8471 | 1095 | |
dd6102fb | 1096 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1097 | if (iattr->ia_valid & ATTR_UID) |
1098 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1099 | |
531b1094 LI |
1100 | if (iattr->ia_valid & ATTR_GID) |
1101 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 | 1102 | } |
059c138b | 1103 | |
3dc5436a | 1104 | /* Write all dirty data */ |
d9bc0d11 EVH |
1105 | if (d_is_reg(dentry)) { |
1106 | retval = filemap_fdatawrite(inode->i_mapping); | |
1107 | if (retval) | |
1108 | p9_debug(P9_DEBUG_ERROR, | |
1109 | "flushing writeback during setattr returned %d\n", retval); | |
1110 | } | |
3dc5436a | 1111 | |
f10fc50f | 1112 | retval = p9_client_wstat(fid, &wstat); |
6636b6dc JW |
1113 | |
1114 | if (use_dentry) | |
b48dbb99 | 1115 | p9_fid_put(fid); |
6636b6dc | 1116 | |
f10fc50f AK |
1117 | if (retval < 0) |
1118 | return retval; | |
059c138b AK |
1119 | |
1120 | if ((iattr->ia_valid & ATTR_SIZE) && | |
d9bc0d11 | 1121 | iattr->ia_size != i_size_read(inode)) { |
24e42e32 | 1122 | truncate_setsize(inode, iattr->ia_size); |
1543b4c5 EVH |
1123 | truncate_pagecache(inode, iattr->ia_size); |
1124 | ||
4eb31178 EVH |
1125 | #ifdef CONFIG_9P_FSCACHE |
1126 | if (v9ses->cache & CACHE_FSCACHE) { | |
1127 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
1128 | ||
d9bc0d11 | 1129 | fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); |
4eb31178 EVH |
1130 | } |
1131 | #endif | |
24e42e32 | 1132 | } |
059c138b | 1133 | |
24e42e32 | 1134 | v9fs_invalidate_inode_attr(inode); |
2bad8471 | 1135 | |
c1632a0f | 1136 | setattr_copy(&nop_mnt_idmap, inode, iattr); |
24e42e32 | 1137 | mark_inode_dirty(inode); |
1025774c | 1138 | return 0; |
2bad8471 EVH |
1139 | } |
1140 | ||
1141 | /** | |
531b1094 LI |
1142 | * v9fs_stat2inode - populate an inode structure with mistat info |
1143 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1144 | * @inode: inode to populate |
1145 | * @sb: superblock of filesystem | |
5e3cc1ee | 1146 | * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
2bad8471 EVH |
1147 | * |
1148 | */ | |
1149 | ||
1150 | void | |
51a87c55 | 1151 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
5e3cc1ee | 1152 | struct super_block *sb, unsigned int flags) |
2bad8471 | 1153 | { |
3eda0de6 | 1154 | umode_t mode; |
2bad8471 | 1155 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
b3cbea03 | 1156 | struct v9fs_inode *v9inode = V9FS_I(inode); |
2bad8471 | 1157 | |
bfe86848 | 1158 | set_nlink(inode, 1); |
2bad8471 | 1159 | |
531b1094 LI |
1160 | inode->i_atime.tv_sec = stat->atime; |
1161 | inode->i_mtime.tv_sec = stat->mtime; | |
1162 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1163 | |
bd32b82d LI |
1164 | inode->i_uid = v9ses->dfltuid; |
1165 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1166 | |
dd6102fb | 1167 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1168 | inode->i_uid = stat->n_uid; |
1169 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1170 | } |
5717144a | 1171 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
9652c732 AV |
1172 | if (v9fs_proto_dotu(v9ses)) { |
1173 | unsigned int i_nlink; | |
5717144a | 1174 | /* |
9652c732 AV |
1175 | * Hadlink support got added later to the .u extension. |
1176 | * So there can be a server out there that doesn't | |
1177 | * support this even with .u extension. That would | |
1178 | * just leave us with stat->extension being an empty | |
1179 | * string, though. | |
5717144a | 1180 | */ |
5717144a | 1181 | /* HARDLINKCOUNT %u */ |
9652c732 AV |
1182 | if (sscanf(stat->extension, |
1183 | " HARDLINKCOUNT %u", &i_nlink) == 1) | |
bfe86848 | 1184 | set_nlink(inode, i_nlink); |
5717144a AK |
1185 | } |
1186 | } | |
df345c67 | 1187 | mode = p9mode2perm(v9ses, stat); |
45089142 AK |
1188 | mode |= inode->i_mode & ~S_IALLUGO; |
1189 | inode->i_mode = mode; | |
2bad8471 | 1190 | |
5e3cc1ee HT |
1191 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
1192 | v9fs_i_size_write(inode, stat->length); | |
bd238fb4 | 1193 | /* not real number of blocks, but 512 byte ones ... */ |
5e3cc1ee | 1194 | inode->i_blocks = (stat->length + 512 - 1) >> 9; |
b3cbea03 | 1195 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
2bad8471 EVH |
1196 | } |
1197 | ||
1198 | /** | |
1199 | * v9fs_qid2ino - convert qid into inode number | |
1200 | * @qid: qid to hash | |
1201 | * | |
1202 | * BUG: potential for inode number collisions? | |
1203 | */ | |
1204 | ||
bd238fb4 | 1205 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1206 | { |
1207 | u64 path = qid->path + 2; | |
1208 | ino_t i = 0; | |
1209 | ||
1210 | if (sizeof(ino_t) == sizeof(path)) | |
1211 | memcpy(&i, &path, sizeof(ino_t)); | |
1212 | else | |
1213 | i = (ino_t) (path ^ (path >> 32)); | |
1214 | ||
1215 | return i; | |
1216 | } | |
1217 | ||
2bad8471 | 1218 | /** |
6b255391 | 1219 | * v9fs_vfs_get_link - follow a symlink path |
2bad8471 | 1220 | * @dentry: dentry for symlink |
6b255391 | 1221 | * @inode: inode for symlink |
fceef393 | 1222 | * @done: delayed call for when we are done with the return value |
2bad8471 EVH |
1223 | */ |
1224 | ||
6b255391 | 1225 | static const char *v9fs_vfs_get_link(struct dentry *dentry, |
fceef393 AV |
1226 | struct inode *inode, |
1227 | struct delayed_call *done) | |
2bad8471 | 1228 | { |
6b255391 AV |
1229 | struct v9fs_session_info *v9ses; |
1230 | struct p9_fid *fid; | |
51a87c55 | 1231 | struct p9_wstat *st; |
680baacb | 1232 | char *res; |
2bad8471 | 1233 | |
6b255391 AV |
1234 | if (!dentry) |
1235 | return ERR_PTR(-ECHILD); | |
1236 | ||
1237 | v9ses = v9fs_dentry2v9ses(dentry); | |
e5690f26 DM |
1238 | if (!v9fs_proto_dotu(v9ses)) |
1239 | return ERR_PTR(-EBADF); | |
1240 | ||
90e4fc88 | 1241 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
e5690f26 | 1242 | fid = v9fs_fid_lookup(dentry); |
90e4fc88 | 1243 | |
ba17674f | 1244 | if (IS_ERR(fid)) |
90e4fc88 | 1245 | return ERR_CAST(fid); |
2bad8471 | 1246 | |
bd238fb4 | 1247 | st = p9_client_stat(fid); |
b48dbb99 | 1248 | p9_fid_put(fid); |
bd238fb4 | 1249 | if (IS_ERR(st)) |
90e4fc88 | 1250 | return ERR_CAST(st); |
2bad8471 | 1251 | |
bd238fb4 | 1252 | if (!(st->mode & P9_DMSYMLINK)) { |
90e4fc88 AV |
1253 | p9stat_free(st); |
1254 | kfree(st); | |
1255 | return ERR_PTR(-EINVAL); | |
2bad8471 | 1256 | } |
680baacb | 1257 | res = st->extension; |
90e4fc88 | 1258 | st->extension = NULL; |
680baacb AV |
1259 | if (strlen(res) >= PATH_MAX) |
1260 | res[PATH_MAX - 1] = '\0'; | |
1261 | ||
62b2be59 | 1262 | p9stat_free(st); |
bd238fb4 | 1263 | kfree(st); |
fceef393 AV |
1264 | set_delayed_call(done, kfree_link, res); |
1265 | return res; | |
2bad8471 EVH |
1266 | } |
1267 | ||
ee443996 EVH |
1268 | /** |
1269 | * v9fs_vfs_mkspecial - create a special file | |
1270 | * @dir: inode to create special file in | |
1271 | * @dentry: dentry to create | |
fd2916bd | 1272 | * @perm: mode to create special file |
ee443996 EVH |
1273 | * @extension: 9p2000.u format extension string representing special file |
1274 | * | |
1275 | */ | |
1276 | ||
531b1094 | 1277 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
c2837de7 | 1278 | u32 perm, const char *extension) |
2bad8471 | 1279 | { |
bd238fb4 | 1280 | struct p9_fid *fid; |
d28c61f0 | 1281 | struct v9fs_session_info *v9ses; |
2bad8471 | 1282 | |
6a3124a3 | 1283 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1284 | if (!v9fs_proto_dotu(v9ses)) { |
5d385153 | 1285 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1286 | return -EPERM; |
2bad8471 EVH |
1287 | } |
1288 | ||
bd238fb4 LI |
1289 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1290 | P9_OREAD); | |
1291 | if (IS_ERR(fid)) | |
1292 | return PTR_ERR(fid); | |
da977b2c | 1293 | |
d28c61f0 | 1294 | v9fs_invalidate_inode_attr(dir); |
b48dbb99 | 1295 | p9_fid_put(fid); |
6a3124a3 | 1296 | return 0; |
531b1094 LI |
1297 | } |
1298 | ||
1299 | /** | |
1300 | * v9fs_vfs_symlink - helper function to create symlinks | |
7a77db95 | 1301 | * @idmap: idmap of the mount |
531b1094 LI |
1302 | * @dir: directory inode containing symlink |
1303 | * @dentry: dentry for symlink | |
1304 | * @symname: symlink data | |
1305 | * | |
ee443996 | 1306 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1307 | * |
1308 | */ | |
1309 | ||
1310 | static int | |
7a77db95 | 1311 | v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 1312 | struct dentry *dentry, const char *symname) |
531b1094 | 1313 | { |
4b8e9923 AV |
1314 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", |
1315 | dir->i_ino, dentry, symname); | |
531b1094 | 1316 | |
c2837de7 | 1317 | return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); |
531b1094 LI |
1318 | } |
1319 | ||
b46c267e AV |
1320 | #define U32_MAX_DIGITS 10 |
1321 | ||
531b1094 LI |
1322 | /** |
1323 | * v9fs_vfs_link - create a hardlink | |
1324 | * @old_dentry: dentry for file to link to | |
1325 | * @dir: inode destination for new link | |
1326 | * @dentry: dentry for link | |
1327 | * | |
1328 | */ | |
1329 | ||
531b1094 LI |
1330 | static int |
1331 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1332 | struct dentry *dentry) | |
1333 | { | |
1334 | int retval; | |
b46c267e | 1335 | char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ |
d28c61f0 | 1336 | struct p9_fid *oldfid; |
531b1094 | 1337 | |
4b8e9923 AV |
1338 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", |
1339 | dir->i_ino, dentry, old_dentry); | |
531b1094 | 1340 | |
da977b2c | 1341 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1342 | if (IS_ERR(oldfid)) |
da977b2c | 1343 | return PTR_ERR(oldfid); |
531b1094 | 1344 | |
16cce6d2 | 1345 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1346 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
c06c066a | 1347 | if (!retval) { |
2b0143b5 | 1348 | v9fs_refresh_inode(oldfid, d_inode(old_dentry)); |
d28c61f0 | 1349 | v9fs_invalidate_inode_attr(dir); |
c06c066a | 1350 | } |
b48dbb99 | 1351 | p9_fid_put(oldfid); |
2bad8471 EVH |
1352 | return retval; |
1353 | } | |
1354 | ||
1355 | /** | |
1356 | * v9fs_vfs_mknod - create a special file | |
5ebb29be | 1357 | * @idmap: idmap of the mount |
2bad8471 EVH |
1358 | * @dir: inode destination for new link |
1359 | * @dentry: dentry for file | |
1360 | * @mode: mode for creation | |
ee443996 | 1361 | * @rdev: device associated with special file |
2bad8471 EVH |
1362 | * |
1363 | */ | |
1364 | ||
1365 | static int | |
5ebb29be | 1366 | v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 1367 | struct dentry *dentry, umode_t mode, dev_t rdev) |
2bad8471 | 1368 | { |
c2837de7 | 1369 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
531b1094 | 1370 | int retval; |
b46c267e | 1371 | char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; |
c2837de7 | 1372 | u32 perm; |
2bad8471 | 1373 | |
6e195b0f | 1374 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", |
4b8e9923 | 1375 | dir->i_ino, dentry, mode, |
5d385153 | 1376 | MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1377 | |
2bad8471 EVH |
1378 | /* build extension */ |
1379 | if (S_ISBLK(mode)) | |
531b1094 | 1380 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1381 | else if (S_ISCHR(mode)) |
531b1094 | 1382 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
b46c267e | 1383 | else |
75cc5c9b | 1384 | *name = 0; |
2bad8471 | 1385 | |
c2837de7 AV |
1386 | perm = unixmode2p9mode(v9ses, mode); |
1387 | retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); | |
2bad8471 EVH |
1388 | |
1389 | return retval; | |
1390 | } | |
1391 | ||
b3cbea03 AK |
1392 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
1393 | { | |
45089142 AK |
1394 | int umode; |
1395 | dev_t rdev; | |
b3cbea03 AK |
1396 | struct p9_wstat *st; |
1397 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 1398 | unsigned int flags; |
b3cbea03 AK |
1399 | |
1400 | v9ses = v9fs_inode2v9ses(inode); | |
1401 | st = p9_client_stat(fid); | |
1402 | if (IS_ERR(st)) | |
1403 | return PTR_ERR(st); | |
45089142 AK |
1404 | /* |
1405 | * Don't update inode if the file type is different | |
1406 | */ | |
1407 | umode = p9mode2unixmode(v9ses, st, &rdev); | |
6e3e2c43 | 1408 | if (inode_wrong_type(inode, umode)) |
45089142 | 1409 | goto out; |
b3cbea03 | 1410 | |
b3cbea03 AK |
1411 | /* |
1412 | * We don't want to refresh inode->i_size, | |
1413 | * because we may have cached data | |
1414 | */ | |
4eb31178 | 1415 | flags = (v9ses->cache & CACHE_LOOSE) ? |
5e3cc1ee HT |
1416 | V9FS_STAT2INODE_KEEP_ISIZE : 0; |
1417 | v9fs_stat2inode(st, inode, inode->i_sb, flags); | |
45089142 | 1418 | out: |
b3cbea03 AK |
1419 | p9stat_free(st); |
1420 | kfree(st); | |
1421 | return 0; | |
1422 | } | |
1423 | ||
9b6533c9 SK |
1424 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1425 | .create = v9fs_vfs_create, | |
1426 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1427 | .atomic_open = v9fs_vfs_atomic_open, |
9b6533c9 | 1428 | .symlink = v9fs_vfs_symlink, |
50cc42ff | 1429 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1430 | .unlink = v9fs_vfs_unlink, |
1431 | .mkdir = v9fs_vfs_mkdir, | |
1432 | .rmdir = v9fs_vfs_rmdir, | |
1d76e313 | 1433 | .mknod = v9fs_vfs_mknod, |
9b6533c9 SK |
1434 | .rename = v9fs_vfs_rename, |
1435 | .getattr = v9fs_vfs_getattr, | |
1436 | .setattr = v9fs_vfs_setattr, | |
1437 | }; | |
1438 | ||
754661f1 | 1439 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1440 | .create = v9fs_vfs_create, |
1441 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1442 | .atomic_open = v9fs_vfs_atomic_open, |
b501611a EVH |
1443 | .unlink = v9fs_vfs_unlink, |
1444 | .mkdir = v9fs_vfs_mkdir, | |
1445 | .rmdir = v9fs_vfs_rmdir, | |
1446 | .mknod = v9fs_vfs_mknod, | |
1447 | .rename = v9fs_vfs_rename, | |
1448 | .getattr = v9fs_vfs_getattr, | |
1449 | .setattr = v9fs_vfs_setattr, | |
1450 | }; | |
1451 | ||
754661f1 | 1452 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1453 | .getattr = v9fs_vfs_getattr, |
1454 | .setattr = v9fs_vfs_setattr, | |
1455 | }; | |
1456 | ||
754661f1 | 1457 | static const struct inode_operations v9fs_symlink_inode_operations = { |
6b255391 | 1458 | .get_link = v9fs_vfs_get_link, |
2bad8471 EVH |
1459 | .getattr = v9fs_vfs_getattr, |
1460 | .setattr = v9fs_vfs_setattr, | |
1461 | }; | |
9b6533c9 | 1462 |