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 | 18 | #include <linux/namei.h> |
e8edc6e0 | 19 | #include <linux/sched.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
ebf46264 | 21 | #include <linux/xattr.h> |
85ff872d | 22 | #include <linux/posix_acl.h> |
bd238fb4 LI |
23 | #include <net/9p/9p.h> |
24 | #include <net/9p/client.h> | |
2bad8471 | 25 | |
2bad8471 | 26 | #include "v9fs.h" |
2bad8471 | 27 | #include "v9fs_vfs.h" |
2bad8471 | 28 | #include "fid.h" |
60e78d2c | 29 | #include "cache.h" |
ebf46264 | 30 | #include "xattr.h" |
85ff872d | 31 | #include "acl.h" |
2bad8471 | 32 | |
754661f1 | 33 | static const struct inode_operations v9fs_dir_inode_operations; |
9b6533c9 | 34 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
754661f1 AV |
35 | static const struct inode_operations v9fs_file_inode_operations; |
36 | static const struct inode_operations v9fs_symlink_inode_operations; | |
f5fc6145 | 37 | |
2bad8471 EVH |
38 | /** |
39 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
40 | * @v9ses: v9fs session information | |
41 | * @mode: mode to convert | |
42 | * | |
43 | */ | |
44 | ||
3eda0de6 | 45 | static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) |
2bad8471 EVH |
46 | { |
47 | int res; | |
6e195b0f | 48 | |
2bad8471 EVH |
49 | res = mode & 0777; |
50 | if (S_ISDIR(mode)) | |
bd238fb4 | 51 | res |= P9_DMDIR; |
dd6102fb | 52 | if (v9fs_proto_dotu(v9ses)) { |
2bad8471 EVH |
53 | if (v9ses->nodev == 0) { |
54 | if (S_ISSOCK(mode)) | |
bd238fb4 | 55 | res |= P9_DMSOCKET; |
2bad8471 | 56 | if (S_ISFIFO(mode)) |
bd238fb4 | 57 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 58 | if (S_ISBLK(mode)) |
bd238fb4 | 59 | res |= P9_DMDEVICE; |
2bad8471 | 60 | if (S_ISCHR(mode)) |
bd238fb4 | 61 | res |= P9_DMDEVICE; |
2bad8471 EVH |
62 | } |
63 | ||
64 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 65 | res |= P9_DMSETUID; |
2bad8471 | 66 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 67 | res |= P9_DMSETGID; |
d199d652 AL |
68 | if ((mode & S_ISVTX) == S_ISVTX) |
69 | res |= P9_DMSETVTX; | |
2bad8471 | 70 | } |
2bad8471 EVH |
71 | return res; |
72 | } | |
73 | ||
df345c67 AK |
74 | /** |
75 | * p9mode2perm- convert plan9 mode bits to unix permission bits | |
76 | * @v9ses: v9fs session information | |
77 | * @stat: p9_wstat from which mode need to be derived | |
78 | * | |
79 | */ | |
80 | static int p9mode2perm(struct v9fs_session_info *v9ses, | |
81 | struct p9_wstat *stat) | |
82 | { | |
83 | int res; | |
84 | int mode = stat->mode; | |
85 | ||
86 | res = mode & S_IALLUGO; | |
87 | if (v9fs_proto_dotu(v9ses)) { | |
88 | if ((mode & P9_DMSETUID) == P9_DMSETUID) | |
89 | res |= S_ISUID; | |
90 | ||
91 | if ((mode & P9_DMSETGID) == P9_DMSETGID) | |
92 | res |= S_ISGID; | |
93 | ||
94 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
95 | res |= S_ISVTX; | |
96 | } | |
97 | return res; | |
98 | } | |
99 | ||
2bad8471 EVH |
100 | /** |
101 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
102 | * @v9ses: v9fs session information | |
45089142 AK |
103 | * @stat: p9_wstat from which mode need to be derived |
104 | * @rdev: major number, minor number in case of device files. | |
2bad8471 EVH |
105 | * |
106 | */ | |
3eda0de6 AV |
107 | static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, |
108 | struct p9_wstat *stat, dev_t *rdev) | |
2bad8471 | 109 | { |
05f975cd | 110 | int res, r; |
3eda0de6 | 111 | u32 mode = stat->mode; |
2bad8471 | 112 | |
45089142 | 113 | *rdev = 0; |
df345c67 | 114 | res = p9mode2perm(v9ses, stat); |
2bad8471 | 115 | |
bd238fb4 | 116 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 117 | res |= S_IFDIR; |
dd6102fb | 118 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
2bad8471 | 119 | res |= S_IFLNK; |
dd6102fb | 120 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
121 | && (v9ses->nodev == 0)) |
122 | res |= S_IFSOCK; | |
dd6102fb | 123 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
124 | && (v9ses->nodev == 0)) |
125 | res |= S_IFIFO; | |
dd6102fb | 126 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
45089142 | 127 | && (v9ses->nodev == 0)) { |
05f975cd | 128 | char type = 0; |
45089142 AK |
129 | int major = -1, minor = -1; |
130 | ||
05f975cd DM |
131 | r = sscanf(stat->extension, "%c %i %i", &type, &major, &minor); |
132 | if (r != 3) { | |
133 | p9_debug(P9_DEBUG_ERROR, | |
134 | "invalid device string, umode will be bogus: %s\n", | |
135 | stat->extension); | |
136 | return res; | |
137 | } | |
45089142 AK |
138 | switch (type) { |
139 | case 'c': | |
140 | res |= S_IFCHR; | |
141 | break; | |
142 | case 'b': | |
143 | res |= S_IFBLK; | |
144 | break; | |
145 | default: | |
5d385153 JP |
146 | p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", |
147 | type, stat->extension); | |
51958817 | 148 | } |
45089142 AK |
149 | *rdev = MKDEV(major, minor); |
150 | } else | |
2bad8471 EVH |
151 | res |= S_IFREG; |
152 | ||
2bad8471 EVH |
153 | return res; |
154 | } | |
155 | ||
ee443996 EVH |
156 | /** |
157 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
158 | * @uflags: flags to convert | |
2e4bef41 | 159 | * @extended: if .u extensions are active |
ee443996 EVH |
160 | */ |
161 | ||
2e4bef41 | 162 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
163 | { |
164 | int ret; | |
165 | ||
166 | ret = 0; | |
167 | switch (uflags&3) { | |
168 | default: | |
169 | case O_RDONLY: | |
bd238fb4 | 170 | ret = P9_OREAD; |
6a3124a3 LI |
171 | break; |
172 | ||
173 | case O_WRONLY: | |
bd238fb4 | 174 | ret = P9_OWRITE; |
6a3124a3 LI |
175 | break; |
176 | ||
177 | case O_RDWR: | |
bd238fb4 | 178 | ret = P9_ORDWR; |
6a3124a3 LI |
179 | break; |
180 | } | |
181 | ||
2e4bef41 EVH |
182 | if (extended) { |
183 | if (uflags & O_EXCL) | |
184 | ret |= P9_OEXCL; | |
185 | ||
186 | if (uflags & O_APPEND) | |
187 | ret |= P9_OAPPEND; | |
188 | } | |
6a3124a3 LI |
189 | |
190 | return ret; | |
191 | } | |
192 | ||
2bad8471 | 193 | /** |
531b1094 | 194 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
531b1094 | 195 | * @wstat: structure to initialize |
2bad8471 EVH |
196 | * |
197 | */ | |
198 | ||
7a4439c4 | 199 | void |
bd238fb4 | 200 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 201 | { |
531b1094 LI |
202 | wstat->type = ~0; |
203 | wstat->dev = ~0; | |
204 | wstat->qid.type = ~0; | |
205 | wstat->qid.version = ~0; | |
206 | *((long long *)&wstat->qid.path) = ~0; | |
207 | wstat->mode = ~0; | |
208 | wstat->atime = ~0; | |
209 | wstat->mtime = ~0; | |
210 | wstat->length = ~0; | |
211 | wstat->name = NULL; | |
212 | wstat->uid = NULL; | |
213 | wstat->gid = NULL; | |
214 | wstat->muid = NULL; | |
447c5094 EB |
215 | wstat->n_uid = INVALID_UID; |
216 | wstat->n_gid = INVALID_GID; | |
217 | wstat->n_muid = INVALID_UID; | |
531b1094 | 218 | wstat->extension = NULL; |
2bad8471 EVH |
219 | } |
220 | ||
60e78d2c AK |
221 | /** |
222 | * v9fs_alloc_inode - helper function to allocate an inode | |
bc868036 | 223 | * @sb: The superblock to allocate the inode from |
60e78d2c | 224 | */ |
60e78d2c AK |
225 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
226 | { | |
a78ce05d | 227 | struct v9fs_inode *v9inode; |
6e195b0f | 228 | |
fd60b288 | 229 | v9inode = alloc_inode_sb(sb, v9fs_inode_cache, GFP_KERNEL); |
a78ce05d | 230 | if (!v9inode) |
60e78d2c | 231 | return NULL; |
b3cbea03 | 232 | v9inode->cache_validity = 0; |
5a7e0a8c | 233 | mutex_init(&v9inode->v_mutex); |
874c8ca1 | 234 | return &v9inode->netfs.inode; |
60e78d2c AK |
235 | } |
236 | ||
237 | /** | |
5e8a0770 | 238 | * v9fs_free_inode - destroy an inode |
bc868036 | 239 | * @inode: The inode to be freed |
60e78d2c AK |
240 | */ |
241 | ||
5e8a0770 | 242 | void v9fs_free_inode(struct inode *inode) |
60e78d2c | 243 | { |
a78ce05d | 244 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
60e78d2c | 245 | } |
fa0d7e3d | 246 | |
bc899ee1 DH |
247 | /* |
248 | * Set parameters for the netfs library | |
249 | */ | |
250 | static void v9fs_set_netfs_context(struct inode *inode) | |
251 | { | |
e81fb419 LT |
252 | struct v9fs_inode *v9inode = V9FS_I(inode); |
253 | netfs_inode_init(&v9inode->netfs, &v9fs_req_ops); | |
bc899ee1 DH |
254 | } |
255 | ||
5ffc0cb3 | 256 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
3eda0de6 | 257 | struct inode *inode, umode_t mode, dev_t rdev) |
2bad8471 | 258 | { |
5ffc0cb3 | 259 | int err = 0; |
2bb54115 | 260 | |
f2d40141 | 261 | inode_init_owner(&nop_mnt_idmap, inode, NULL, mode); |
2bb54115 | 262 | inode->i_blocks = 0; |
45089142 | 263 | inode->i_rdev = rdev; |
078cd827 | 264 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
2bb54115 | 265 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
987a6485 | 266 | inode->i_private = NULL; |
2bb54115 AK |
267 | |
268 | switch (mode & S_IFMT) { | |
269 | case S_IFIFO: | |
270 | case S_IFBLK: | |
271 | case S_IFCHR: | |
272 | case S_IFSOCK: | |
4b43516a MK |
273 | if (v9fs_proto_dotl(v9ses)) { |
274 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
4b43516a MK |
275 | } else if (v9fs_proto_dotu(v9ses)) { |
276 | inode->i_op = &v9fs_file_inode_operations; | |
4b43516a | 277 | } else { |
5d385153 JP |
278 | p9_debug(P9_DEBUG_ERROR, |
279 | "special files without extended mode\n"); | |
2bb54115 AK |
280 | err = -EINVAL; |
281 | goto error; | |
2bad8471 | 282 | } |
2bb54115 AK |
283 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
284 | break; | |
285 | case S_IFREG: | |
9b6533c9 SK |
286 | if (v9fs_proto_dotl(v9ses)) { |
287 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
d9bc0d11 | 288 | inode->i_fop = &v9fs_file_operations_dotl; |
9b6533c9 SK |
289 | } else { |
290 | inode->i_op = &v9fs_file_inode_operations; | |
d9bc0d11 | 291 | inode->i_fop = &v9fs_file_operations; |
9b6533c9 SK |
292 | } |
293 | ||
2bb54115 AK |
294 | break; |
295 | case S_IFLNK: | |
9b6533c9 | 296 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
5d385153 JP |
297 | p9_debug(P9_DEBUG_ERROR, |
298 | "extended modes used with legacy protocol\n"); | |
2bb54115 AK |
299 | err = -EINVAL; |
300 | goto error; | |
301 | } | |
9b6533c9 SK |
302 | |
303 | if (v9fs_proto_dotl(v9ses)) | |
304 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
305 | else | |
306 | inode->i_op = &v9fs_symlink_inode_operations; | |
307 | ||
2bb54115 AK |
308 | break; |
309 | case S_IFDIR: | |
310 | inc_nlink(inode); | |
9b6533c9 SK |
311 | if (v9fs_proto_dotl(v9ses)) |
312 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
313 | else if (v9fs_proto_dotu(v9ses)) | |
314 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
315 | else |
316 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
317 | |
318 | if (v9fs_proto_dotl(v9ses)) | |
319 | inode->i_fop = &v9fs_dir_operations_dotl; | |
320 | else | |
321 | inode->i_fop = &v9fs_dir_operations; | |
322 | ||
2bb54115 AK |
323 | break; |
324 | default: | |
609eac1c | 325 | p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", |
5d385153 | 326 | mode, mode & S_IFMT); |
2bb54115 AK |
327 | err = -EINVAL; |
328 | goto error; | |
2bad8471 | 329 | } |
bc899ee1 DH |
330 | |
331 | v9fs_set_netfs_context(inode); | |
5ffc0cb3 AK |
332 | error: |
333 | return err; | |
2bb54115 | 334 | |
5ffc0cb3 | 335 | } |
2bb54115 | 336 | |
5ffc0cb3 AK |
337 | /** |
338 | * v9fs_get_inode - helper function to setup an inode | |
339 | * @sb: superblock | |
340 | * @mode: mode to setup inode with | |
bc868036 | 341 | * @rdev: The device numbers to set |
5ffc0cb3 AK |
342 | */ |
343 | ||
3eda0de6 | 344 | struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) |
5ffc0cb3 AK |
345 | { |
346 | int err; | |
347 | struct inode *inode; | |
348 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
349 | ||
609eac1c | 350 | p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); |
5ffc0cb3 AK |
351 | |
352 | inode = new_inode(sb); | |
353 | if (!inode) { | |
5d385153 JP |
354 | pr_warn("%s (%d): Problem allocating inode\n", |
355 | __func__, task_pid_nr(current)); | |
5ffc0cb3 AK |
356 | return ERR_PTR(-ENOMEM); |
357 | } | |
45089142 | 358 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
5ffc0cb3 AK |
359 | if (err) { |
360 | iput(inode); | |
361 | return ERR_PTR(err); | |
362 | } | |
363 | return inode; | |
2bad8471 EVH |
364 | } |
365 | ||
60e78d2c | 366 | /** |
bc868036 | 367 | * v9fs_evict_inode - Remove an inode from the inode cache |
60e78d2c AK |
368 | * @inode: inode to release |
369 | * | |
370 | */ | |
b57922d9 | 371 | void v9fs_evict_inode(struct inode *inode) |
60e78d2c | 372 | { |
4eb31178 EVH |
373 | struct v9fs_inode __maybe_unused *v9inode = V9FS_I(inode); |
374 | __le32 __maybe_unused version; | |
6b39f6d2 | 375 | |
4ad78628 | 376 | truncate_inode_pages_final(&inode->i_data); |
4eb31178 EVH |
377 | |
378 | #ifdef CONFIG_9P_FSCACHE | |
93c84614 DH |
379 | version = cpu_to_le32(v9inode->qid.version); |
380 | fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, | |
381 | &version); | |
4eb31178 EVH |
382 | #endif |
383 | ||
dbd5768f | 384 | clear_inode(inode); |
4ad78628 | 385 | filemap_fdatawrite(&inode->i_data); |
60e78d2c | 386 | |
4eb31178 | 387 | #ifdef CONFIG_9P_FSCACHE |
24e42e32 | 388 | fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false); |
4eb31178 | 389 | #endif |
60e78d2c AK |
390 | } |
391 | ||
fd2421f5 AK |
392 | static int v9fs_test_inode(struct inode *inode, void *data) |
393 | { | |
394 | int umode; | |
45089142 | 395 | dev_t rdev; |
fd2421f5 AK |
396 | struct v9fs_inode *v9inode = V9FS_I(inode); |
397 | struct p9_wstat *st = (struct p9_wstat *)data; | |
398 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); | |
399 | ||
45089142 | 400 | umode = p9mode2unixmode(v9ses, st, &rdev); |
fd2421f5 | 401 | /* don't match inode of different type */ |
6e3e2c43 | 402 | if (inode_wrong_type(inode, umode)) |
fd2421f5 AK |
403 | return 0; |
404 | ||
405 | /* compare qid details */ | |
406 | if (memcmp(&v9inode->qid.version, | |
407 | &st->qid.version, sizeof(v9inode->qid.version))) | |
408 | return 0; | |
409 | ||
410 | if (v9inode->qid.type != st->qid.type) | |
411 | return 0; | |
8ee03163 TT |
412 | |
413 | if (v9inode->qid.path != st->qid.path) | |
414 | return 0; | |
fd2421f5 AK |
415 | return 1; |
416 | } | |
417 | ||
ed80fcfa AK |
418 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
419 | { | |
420 | return 0; | |
421 | } | |
422 | ||
fd2421f5 AK |
423 | static int v9fs_set_inode(struct inode *inode, void *data) |
424 | { | |
425 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
426 | struct p9_wstat *st = (struct p9_wstat *)data; | |
427 | ||
428 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
429 | return 0; | |
430 | } | |
431 | ||
5ffc0cb3 AK |
432 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
433 | struct p9_qid *qid, | |
ed80fcfa AK |
434 | struct p9_wstat *st, |
435 | int new) | |
6a3124a3 | 436 | { |
45089142 | 437 | dev_t rdev; |
3eda0de6 AV |
438 | int retval; |
439 | umode_t umode; | |
5ffc0cb3 AK |
440 | unsigned long i_ino; |
441 | struct inode *inode; | |
442 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
6e195b0f | 443 | int (*test)(struct inode *inode, void *data); |
ed80fcfa AK |
444 | |
445 | if (new) | |
446 | test = v9fs_test_new_inode; | |
447 | else | |
448 | test = v9fs_test_inode; | |
2bad8471 | 449 | |
5ffc0cb3 | 450 | i_ino = v9fs_qid2ino(qid); |
ed80fcfa | 451 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); |
5ffc0cb3 AK |
452 | if (!inode) |
453 | return ERR_PTR(-ENOMEM); | |
454 | if (!(inode->i_state & I_NEW)) | |
455 | return inode; | |
456 | /* | |
457 | * initialize the inode with the stat info | |
458 | * FIXME!! we may need support for stale inodes | |
459 | * later. | |
460 | */ | |
fd2421f5 | 461 | inode->i_ino = i_ino; |
45089142 AK |
462 | umode = p9mode2unixmode(v9ses, st, &rdev); |
463 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); | |
5ffc0cb3 | 464 | if (retval) |
6a3124a3 | 465 | goto error; |
60e78d2c | 466 | |
5e3cc1ee | 467 | v9fs_stat2inode(st, inode, sb, 0); |
5ffc0cb3 | 468 | v9fs_cache_inode_get_cookie(inode); |
5ffc0cb3 AK |
469 | unlock_new_inode(inode); |
470 | return inode; | |
6a3124a3 | 471 | error: |
0a73d0a2 | 472 | iget_failed(inode); |
5ffc0cb3 AK |
473 | return ERR_PTR(retval); |
474 | ||
475 | } | |
476 | ||
477 | struct inode * | |
a78ce05d | 478 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 479 | struct super_block *sb, int new) |
5ffc0cb3 AK |
480 | { |
481 | struct p9_wstat *st; | |
482 | struct inode *inode = NULL; | |
483 | ||
484 | st = p9_client_stat(fid); | |
485 | if (IS_ERR(st)) | |
486 | return ERR_CAST(st); | |
487 | ||
ed80fcfa | 488 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
02bc3567 | 489 | p9stat_free(st); |
bd238fb4 | 490 | kfree(st); |
5ffc0cb3 | 491 | return inode; |
2bad8471 EVH |
492 | } |
493 | ||
f88657ce AK |
494 | /** |
495 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to | |
496 | * plan 9 AT flag. | |
497 | * @flags: flags to convert | |
498 | */ | |
499 | static int v9fs_at_to_dotl_flags(int flags) | |
500 | { | |
501 | int rflags = 0; | |
6e195b0f | 502 | |
f88657ce AK |
503 | if (flags & AT_REMOVEDIR) |
504 | rflags |= P9_DOTL_AT_REMOVEDIR; | |
6e195b0f | 505 | |
f88657ce AK |
506 | return rflags; |
507 | } | |
508 | ||
ac89b2ef EG |
509 | /** |
510 | * v9fs_dec_count - helper functon to drop i_nlink. | |
511 | * | |
512 | * If a directory had nlink <= 2 (including . and ..), then we should not drop | |
513 | * the link count, which indicates the underlying exported fs doesn't maintain | |
514 | * nlink accurately. e.g. | |
515 | * - overlayfs sets nlink to 1 for merged dir | |
516 | * - ext4 (with dir_nlink feature enabled) sets nlink to 1 if a dir has more | |
517 | * than EXT4_LINK_MAX (65000) links. | |
518 | * | |
519 | * @inode: inode whose nlink is being dropped | |
520 | */ | |
521 | static void v9fs_dec_count(struct inode *inode) | |
522 | { | |
523 | if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2) | |
524 | drop_nlink(inode); | |
525 | } | |
526 | ||
2bad8471 EVH |
527 | /** |
528 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 | 529 | * @dir: directory inode that is being deleted |
48e370ff | 530 | * @dentry: dentry that is being deleted |
fd2916bd | 531 | * @flags: removing a directory |
2bad8471 EVH |
532 | * |
533 | */ | |
534 | ||
48e370ff | 535 | static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) |
2bad8471 | 536 | { |
48e370ff AK |
537 | struct inode *inode; |
538 | int retval = -EOPNOTSUPP; | |
539 | struct p9_fid *v9fid, *dfid; | |
540 | struct v9fs_session_info *v9ses; | |
2bad8471 | 541 | |
5d385153 JP |
542 | p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", |
543 | dir, dentry, flags); | |
2bad8471 | 544 | |
48e370ff | 545 | v9ses = v9fs_inode2v9ses(dir); |
2b0143b5 | 546 | inode = d_inode(dentry); |
77d5a6b7 | 547 | dfid = v9fs_parent_fid(dentry); |
48e370ff AK |
548 | if (IS_ERR(dfid)) { |
549 | retval = PTR_ERR(dfid); | |
5d385153 | 550 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); |
48e370ff AK |
551 | return retval; |
552 | } | |
553 | if (v9fs_proto_dotl(v9ses)) | |
f88657ce AK |
554 | retval = p9_client_unlinkat(dfid, dentry->d_name.name, |
555 | v9fs_at_to_dotl_flags(flags)); | |
b48dbb99 | 556 | p9_fid_put(dfid); |
48e370ff AK |
557 | if (retval == -EOPNOTSUPP) { |
558 | /* Try the one based on path */ | |
559 | v9fid = v9fs_fid_clone(dentry); | |
560 | if (IS_ERR(v9fid)) | |
561 | return PTR_ERR(v9fid); | |
562 | retval = p9_client_remove(v9fid); | |
563 | } | |
b271ec47 AK |
564 | if (!retval) { |
565 | /* | |
566 | * directories on unlink should have zero | |
567 | * link count | |
568 | */ | |
48e370ff AK |
569 | if (flags & AT_REMOVEDIR) { |
570 | clear_nlink(inode); | |
ac89b2ef | 571 | v9fs_dec_count(dir); |
b271ec47 | 572 | } else |
ac89b2ef | 573 | v9fs_dec_count(inode); |
d28c61f0 | 574 | |
48e370ff | 575 | v9fs_invalidate_inode_attr(inode); |
d28c61f0 | 576 | v9fs_invalidate_inode_attr(dir); |
154372e6 EVH |
577 | |
578 | /* invalidate all fids associated with dentry */ | |
579 | /* NOTE: This will not include open fids */ | |
580 | dentry->d_op->d_release(dentry); | |
b271ec47 | 581 | } |
d994f405 | 582 | return retval; |
2bad8471 EVH |
583 | } |
584 | ||
585 | /** | |
bd238fb4 | 586 | * v9fs_create - Create a file |
ee443996 EVH |
587 | * @v9ses: session information |
588 | * @dir: directory that dentry is being created in | |
bd238fb4 | 589 | * @dentry: dentry that is being created |
0e15597e | 590 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
591 | * @perm: create permissions |
592 | * @mode: open mode | |
2bad8471 EVH |
593 | * |
594 | */ | |
bd238fb4 LI |
595 | static struct p9_fid * |
596 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
597 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 598 | { |
6a3124a3 | 599 | int err; |
7880b43b | 600 | const unsigned char *name; |
6636b6dc | 601 | struct p9_fid *dfid, *ofid = NULL, *fid = NULL; |
6a3124a3 | 602 | struct inode *inode; |
6a3124a3 | 603 | |
4b8e9923 | 604 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
51a87c55 | 605 | |
bd238fb4 | 606 | err = 0; |
7880b43b | 607 | name = dentry->d_name.name; |
77d5a6b7 | 608 | dfid = v9fs_parent_fid(dentry); |
ba17674f | 609 | if (IS_ERR(dfid)) { |
da977b2c | 610 | err = PTR_ERR(dfid); |
5d385153 | 611 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
6d27e64d | 612 | return ERR_PTR(err); |
da977b2c | 613 | } |
6a3124a3 | 614 | |
bd238fb4 | 615 | /* clone a fid to use for creation */ |
7d50a29f | 616 | ofid = clone_fid(dfid); |
bd238fb4 LI |
617 | if (IS_ERR(ofid)) { |
618 | err = PTR_ERR(ofid); | |
5d385153 | 619 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
dafbe689 | 620 | goto error; |
bd238fb4 | 621 | } |
6a3124a3 | 622 | |
bd238fb4 | 623 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 | 624 | if (err < 0) { |
5d385153 | 625 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
6a3124a3 | 626 | goto error; |
6d27e64d | 627 | } |
6a3124a3 | 628 | |
b6054793 AK |
629 | if (!(perm & P9_DMLINK)) { |
630 | /* now walk from the parent so we can get unopened fid */ | |
631 | fid = p9_client_walk(dfid, 1, &name, 1); | |
632 | if (IS_ERR(fid)) { | |
633 | err = PTR_ERR(fid); | |
634 | p9_debug(P9_DEBUG_VFS, | |
635 | "p9_client_walk failed %d\n", err); | |
b6054793 AK |
636 | goto error; |
637 | } | |
638 | /* | |
639 | * instantiate inode and assign the unopened fid to the dentry | |
640 | */ | |
641 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
642 | if (IS_ERR(inode)) { | |
643 | err = PTR_ERR(inode); | |
644 | p9_debug(P9_DEBUG_VFS, | |
645 | "inode creation failed %d\n", err); | |
646 | goto error; | |
647 | } | |
dafbe689 | 648 | v9fs_fid_add(dentry, &fid); |
b6054793 | 649 | d_instantiate(dentry, inode); |
6a3124a3 | 650 | } |
b48dbb99 | 651 | p9_fid_put(dfid); |
bd238fb4 | 652 | return ofid; |
bd238fb4 | 653 | error: |
dafbe689 DM |
654 | p9_fid_put(dfid); |
655 | p9_fid_put(ofid); | |
656 | p9_fid_put(fid); | |
bd238fb4 LI |
657 | return ERR_PTR(err); |
658 | } | |
659 | ||
660 | /** | |
e43ae79c | 661 | * v9fs_vfs_create - VFS hook to create a regular file |
6c960e68 | 662 | * @idmap: idmap of the mount |
bc868036 DH |
663 | * @dir: The parent directory |
664 | * @dentry: The name of file to be created | |
665 | * @mode: The UNIX file mode to set | |
666 | * @excl: True if the file must not yet exist | |
e43ae79c MS |
667 | * |
668 | * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called | |
669 | * for mknod(2). | |
670 | * | |
bd238fb4 | 671 | */ |
6a3124a3 | 672 | |
bd238fb4 | 673 | static int |
6c960e68 | 674 | v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 675 | struct dentry *dentry, umode_t mode, bool excl) |
bd238fb4 | 676 | { |
e43ae79c MS |
677 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
678 | u32 perm = unixmode2p9mode(v9ses, mode); | |
679 | struct p9_fid *fid; | |
bd238fb4 | 680 | |
e43ae79c MS |
681 | /* P9_OEXCL? */ |
682 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); | |
683 | if (IS_ERR(fid)) | |
684 | return PTR_ERR(fid); | |
bd238fb4 | 685 | |
d28c61f0 | 686 | v9fs_invalidate_inode_attr(dir); |
b48dbb99 | 687 | p9_fid_put(fid); |
6a3124a3 LI |
688 | |
689 | return 0; | |
2bad8471 EVH |
690 | } |
691 | ||
692 | /** | |
693 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
c54bd91e | 694 | * @idmap: idmap of the mount |
ee443996 | 695 | * @dir: inode that is being unlinked |
2bad8471 EVH |
696 | * @dentry: dentry that is being unlinked |
697 | * @mode: mode for new directory | |
698 | * | |
699 | */ | |
700 | ||
c54bd91e | 701 | static int v9fs_vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 702 | struct dentry *dentry, umode_t mode) |
2bad8471 | 703 | { |
6a3124a3 | 704 | int err; |
bd238fb4 | 705 | u32 perm; |
bd238fb4 | 706 | struct p9_fid *fid; |
d28c61f0 | 707 | struct v9fs_session_info *v9ses; |
6a3124a3 | 708 | |
4b8e9923 | 709 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
bd238fb4 | 710 | err = 0; |
6a3124a3 | 711 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 712 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
713 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
714 | if (IS_ERR(fid)) { | |
715 | err = PTR_ERR(fid); | |
716 | fid = NULL; | |
d28c61f0 | 717 | } else { |
b271ec47 | 718 | inc_nlink(dir); |
d28c61f0 AK |
719 | v9fs_invalidate_inode_attr(dir); |
720 | } | |
6a3124a3 | 721 | |
bd238fb4 | 722 | if (fid) |
b48dbb99 | 723 | p9_fid_put(fid); |
6a3124a3 | 724 | |
6a3124a3 | 725 | return err; |
2bad8471 EVH |
726 | } |
727 | ||
728 | /** | |
729 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
730 | * @dir: inode that is being walked from | |
731 | * @dentry: dentry that is being walked to? | |
fd2916bd | 732 | * @flags: lookup flags (unused) |
2bad8471 EVH |
733 | * |
734 | */ | |
735 | ||
53c06f4e | 736 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
00cd8dd3 | 737 | unsigned int flags) |
2bad8471 | 738 | { |
73f50717 | 739 | struct dentry *res; |
2bad8471 | 740 | struct v9fs_session_info *v9ses; |
bd238fb4 | 741 | struct p9_fid *dfid, *fid; |
2bad8471 | 742 | struct inode *inode; |
7880b43b | 743 | const unsigned char *name; |
2bad8471 | 744 | |
4b8e9923 AV |
745 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n", |
746 | dir, dentry, dentry, flags); | |
2bad8471 | 747 | |
11e9b49b SK |
748 | if (dentry->d_name.len > NAME_MAX) |
749 | return ERR_PTR(-ENAMETOOLONG); | |
750 | ||
2bad8471 | 751 | v9ses = v9fs_inode2v9ses(dir); |
a534c8d1 | 752 | /* We can walk d_parent because we hold the dir->i_mutex */ |
77d5a6b7 | 753 | dfid = v9fs_parent_fid(dentry); |
bd238fb4 | 754 | if (IS_ERR(dfid)) |
e231c2ee | 755 | return ERR_CAST(dfid); |
bd238fb4 | 756 | |
73f50717 AK |
757 | /* |
758 | * Make sure we don't use a wrong inode due to parallel | |
759 | * unlink. For cached mode create calls request for new | |
760 | * inode. But with cache disabled, lookup should do this. | |
761 | */ | |
500e2ab6 AV |
762 | name = dentry->d_name.name; |
763 | fid = p9_client_walk(dfid, 1, &name, 1); | |
b48dbb99 | 764 | p9_fid_put(dfid); |
500e2ab6 AV |
765 | if (fid == ERR_PTR(-ENOENT)) |
766 | inode = NULL; | |
767 | else if (IS_ERR(fid)) | |
768 | inode = ERR_CAST(fid); | |
4eb31178 | 769 | else if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) |
73f50717 AK |
770 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
771 | else | |
772 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); | |
73f50717 AK |
773 | /* |
774 | * If we had a rename on the server and a parallel lookup | |
775 | * for the new name, then make sure we instantiate with | |
776 | * the new name. ie look up for a/b, while on server somebody | |
777 | * moved b under k and client parallely did a lookup for | |
778 | * k/b. | |
779 | */ | |
41d28bca | 780 | res = d_splice_alias(inode, dentry); |
500e2ab6 AV |
781 | if (!IS_ERR(fid)) { |
782 | if (!res) | |
dafbe689 | 783 | v9fs_fid_add(dentry, &fid); |
500e2ab6 | 784 | else if (!IS_ERR(res)) |
dafbe689 | 785 | v9fs_fid_add(res, &fid); |
500e2ab6 | 786 | else |
b48dbb99 | 787 | p9_fid_put(fid); |
500e2ab6 | 788 | } |
7b5be621 | 789 | return res; |
2bad8471 EVH |
790 | } |
791 | ||
d9585277 | 792 | static int |
e43ae79c | 793 | v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, |
6e195b0f | 794 | struct file *file, unsigned int flags, umode_t mode) |
e43ae79c MS |
795 | { |
796 | int err; | |
797 | u32 perm; | |
4eb31178 | 798 | struct v9fs_inode __maybe_unused *v9inode; |
e43ae79c | 799 | struct v9fs_session_info *v9ses; |
1543b4c5 | 800 | struct p9_fid *fid; |
e43ae79c | 801 | struct dentry *res = NULL; |
987a6485 | 802 | struct inode *inode; |
1543b4c5 | 803 | int p9_omode; |
e43ae79c | 804 | |
00699ad8 | 805 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 806 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 807 | if (IS_ERR(res)) |
d9585277 | 808 | return PTR_ERR(res); |
e43ae79c MS |
809 | |
810 | if (res) | |
811 | dentry = res; | |
812 | } | |
813 | ||
814 | /* Only creates */ | |
2b0143b5 | 815 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
e45198a6 | 816 | return finish_no_open(file, res); |
e43ae79c MS |
817 | |
818 | err = 0; | |
fae74696 | 819 | |
e43ae79c MS |
820 | v9ses = v9fs_inode2v9ses(dir); |
821 | perm = unixmode2p9mode(v9ses, mode); | |
1543b4c5 EVH |
822 | p9_omode = v9fs_uflags2omode(flags, v9fs_proto_dotu(v9ses)); |
823 | ||
4eb31178 | 824 | if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { |
21e26d5e | 825 | p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR; |
1543b4c5 EVH |
826 | p9_debug(P9_DEBUG_CACHE, |
827 | "write-only file with writeback enabled, creating w/ O_RDWR\n"); | |
828 | } | |
829 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, p9_omode); | |
e43ae79c MS |
830 | if (IS_ERR(fid)) { |
831 | err = PTR_ERR(fid); | |
e43ae79c MS |
832 | goto error; |
833 | } | |
834 | ||
835 | v9fs_invalidate_inode_attr(dir); | |
987a6485 GK |
836 | inode = d_inode(dentry); |
837 | v9inode = V9FS_I(inode); | |
be12af3e | 838 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 839 | if (err) |
e43ae79c | 840 | goto error; |
e43ae79c | 841 | |
30d90494 | 842 | file->private_data = fid; |
4eb31178 EVH |
843 | #ifdef CONFIG_9P_FSCACHE |
844 | if (v9ses->cache & CACHE_FSCACHE) | |
24e42e32 DH |
845 | fscache_use_cookie(v9fs_inode_cookie(v9inode), |
846 | file->f_mode & FMODE_WRITE); | |
4eb31178 | 847 | #endif |
1543b4c5 EVH |
848 | |
849 | v9fs_fid_add_modes(fid, v9ses->flags, v9ses->cache, file->f_flags); | |
dafbe689 | 850 | v9fs_open_fid_add(inode, &fid); |
e43ae79c | 851 | |
73a09dd9 | 852 | file->f_mode |= FMODE_CREATED; |
e43ae79c MS |
853 | out: |
854 | dput(res); | |
d9585277 | 855 | return err; |
e43ae79c MS |
856 | |
857 | error: | |
dafbe689 | 858 | p9_fid_put(fid); |
e43ae79c MS |
859 | goto out; |
860 | } | |
861 | ||
2bad8471 EVH |
862 | /** |
863 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
864 | * @i: inode that is being unlinked | |
73c592b9 | 865 | * @d: dentry that is being unlinked |
2bad8471 EVH |
866 | * |
867 | */ | |
868 | ||
53c06f4e | 869 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
2bad8471 EVH |
870 | { |
871 | return v9fs_remove(i, d, 0); | |
872 | } | |
873 | ||
874 | /** | |
875 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
876 | * @i: inode that is being unlinked | |
73c592b9 | 877 | * @d: dentry that is being unlinked |
2bad8471 EVH |
878 | * |
879 | */ | |
880 | ||
53c06f4e | 881 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
2bad8471 | 882 | { |
48e370ff | 883 | return v9fs_remove(i, d, AT_REMOVEDIR); |
2bad8471 EVH |
884 | } |
885 | ||
886 | /** | |
887 | * v9fs_vfs_rename - VFS hook to rename an inode | |
e18275ae | 888 | * @idmap: The idmap of the mount |
2bad8471 EVH |
889 | * @old_dir: old dir inode |
890 | * @old_dentry: old dentry | |
891 | * @new_dir: new dir inode | |
892 | * @new_dentry: new dentry | |
bc868036 | 893 | * @flags: RENAME_* flags |
2bad8471 EVH |
894 | * |
895 | */ | |
896 | ||
53c06f4e | 897 | int |
e18275ae | 898 | v9fs_vfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, |
549c7297 CB |
899 | struct dentry *old_dentry, struct inode *new_dir, |
900 | struct dentry *new_dentry, unsigned int flags) | |
2bad8471 | 901 | { |
d28c61f0 | 902 | int retval; |
bd238fb4 | 903 | struct inode *old_inode; |
b271ec47 | 904 | struct inode *new_inode; |
bd238fb4 | 905 | struct v9fs_session_info *v9ses; |
dafbe689 DM |
906 | struct p9_fid *oldfid = NULL, *dfid = NULL; |
907 | struct p9_fid *olddirfid = NULL; | |
908 | struct p9_fid *newdirfid = NULL; | |
bd238fb4 | 909 | struct p9_wstat wstat; |
2bad8471 | 910 | |
1cd66c93 MS |
911 | if (flags) |
912 | return -EINVAL; | |
913 | ||
5d385153 | 914 | p9_debug(P9_DEBUG_VFS, "\n"); |
bd238fb4 | 915 | retval = 0; |
2b0143b5 DH |
916 | old_inode = d_inode(old_dentry); |
917 | new_inode = d_inode(new_dentry); | |
bd238fb4 LI |
918 | v9ses = v9fs_inode2v9ses(old_inode); |
919 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 920 | if (IS_ERR(oldfid)) |
da977b2c EVH |
921 | return PTR_ERR(oldfid); |
922 | ||
6636b6dc JW |
923 | dfid = v9fs_parent_fid(old_dentry); |
924 | olddirfid = clone_fid(dfid); | |
dafbe689 DM |
925 | p9_fid_put(dfid); |
926 | dfid = NULL; | |
6636b6dc | 927 | |
ba17674f | 928 | if (IS_ERR(olddirfid)) { |
da977b2c | 929 | retval = PTR_ERR(olddirfid); |
dafbe689 | 930 | goto error; |
da977b2c EVH |
931 | } |
932 | ||
6636b6dc JW |
933 | dfid = v9fs_parent_fid(new_dentry); |
934 | newdirfid = clone_fid(dfid); | |
b48dbb99 | 935 | p9_fid_put(dfid); |
dafbe689 | 936 | dfid = NULL; |
6636b6dc | 937 | |
ba17674f | 938 | if (IS_ERR(newdirfid)) { |
da977b2c | 939 | retval = PTR_ERR(newdirfid); |
dafbe689 | 940 | goto error; |
2bad8471 EVH |
941 | } |
942 | ||
a534c8d1 | 943 | down_write(&v9ses->rename_sem); |
4681dbda | 944 | if (v9fs_proto_dotl(v9ses)) { |
9e8fb38e AK |
945 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
946 | newdirfid, new_dentry->d_name.name); | |
947 | if (retval == -EOPNOTSUPP) | |
948 | retval = p9_client_rename(oldfid, newdirfid, | |
949 | new_dentry->d_name.name); | |
950 | if (retval != -EOPNOTSUPP) | |
dafbe689 | 951 | goto error_locked; |
4681dbda | 952 | } |
a534c8d1 AK |
953 | if (old_dentry->d_parent != new_dentry->d_parent) { |
954 | /* | |
955 | * 9P .u can only handle file rename in the same directory | |
956 | */ | |
4681dbda | 957 | |
5d385153 | 958 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
621997cd | 959 | retval = -EXDEV; |
dafbe689 | 960 | goto error_locked; |
2bad8471 | 961 | } |
531b1094 | 962 | v9fs_blank_wstat(&wstat); |
ba17674f | 963 | wstat.muid = v9ses->uname; |
7880b43b | 964 | wstat.name = new_dentry->d_name.name; |
bd238fb4 | 965 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 966 | |
dafbe689 | 967 | error_locked: |
b271ec47 AK |
968 | if (!retval) { |
969 | if (new_inode) { | |
970 | if (S_ISDIR(new_inode->i_mode)) | |
971 | clear_nlink(new_inode); | |
972 | else | |
ac89b2ef | 973 | v9fs_dec_count(new_inode); |
b271ec47 AK |
974 | } |
975 | if (S_ISDIR(old_inode->i_mode)) { | |
976 | if (!new_inode) | |
977 | inc_nlink(new_dir); | |
ac89b2ef | 978 | v9fs_dec_count(old_dir); |
b271ec47 | 979 | } |
3bc86de3 | 980 | v9fs_invalidate_inode_attr(old_inode); |
d28c61f0 AK |
981 | v9fs_invalidate_inode_attr(old_dir); |
982 | v9fs_invalidate_inode_attr(new_dir); | |
3bc86de3 | 983 | |
a534c8d1 AK |
984 | /* successful rename */ |
985 | d_move(old_dentry, new_dentry); | |
b271ec47 | 986 | } |
a534c8d1 | 987 | up_write(&v9ses->rename_sem); |
2bad8471 | 988 | |
dafbe689 DM |
989 | error: |
990 | p9_fid_put(newdirfid); | |
b48dbb99 | 991 | p9_fid_put(olddirfid); |
b48dbb99 | 992 | p9_fid_put(oldfid); |
2bad8471 EVH |
993 | return retval; |
994 | } | |
995 | ||
996 | /** | |
943ffb58 | 997 | * v9fs_vfs_getattr - retrieve file metadata |
b74d24f7 | 998 | * @idmap: idmap of the mount |
a528d35e | 999 | * @path: Object to query |
ee443996 | 1000 | * @stat: metadata structure to populate |
a528d35e DH |
1001 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
1002 | * @flags: AT_STATX_xxx setting | |
2bad8471 EVH |
1003 | * |
1004 | */ | |
1005 | ||
1006 | static int | |
b74d24f7 | 1007 | v9fs_vfs_getattr(struct mnt_idmap *idmap, const struct path *path, |
549c7297 | 1008 | struct kstat *stat, u32 request_mask, unsigned int flags) |
2bad8471 | 1009 | { |
a528d35e | 1010 | struct dentry *dentry = path->dentry; |
d9bc0d11 | 1011 | struct inode *inode = d_inode(dentry); |
bd238fb4 LI |
1012 | struct v9fs_session_info *v9ses; |
1013 | struct p9_fid *fid; | |
51a87c55 | 1014 | struct p9_wstat *st; |
bd238fb4 | 1015 | |
5d385153 | 1016 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 1017 | v9ses = v9fs_dentry2v9ses(dentry); |
4eb31178 | 1018 | if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { |
1543b4c5 | 1019 | generic_fillattr(&nop_mnt_idmap, inode, stat); |
a1211908 | 1020 | return 0; |
4eb31178 | 1021 | } else if (v9ses->cache & CACHE_WRITEBACK) { |
d9bc0d11 EVH |
1022 | if (S_ISREG(inode->i_mode)) { |
1023 | int retval = filemap_fdatawrite(inode->i_mapping); | |
1024 | ||
1025 | if (retval) | |
1026 | p9_debug(P9_DEBUG_ERROR, | |
1027 | "flushing writeback during getattr returned %d\n", retval); | |
1028 | } | |
a1211908 | 1029 | } |
bd238fb4 LI |
1030 | fid = v9fs_fid_lookup(dentry); |
1031 | if (IS_ERR(fid)) | |
da977b2c | 1032 | return PTR_ERR(fid); |
2bad8471 | 1033 | |
bd238fb4 | 1034 | st = p9_client_stat(fid); |
b48dbb99 | 1035 | p9_fid_put(fid); |
bd238fb4 LI |
1036 | if (IS_ERR(st)) |
1037 | return PTR_ERR(st); | |
2bad8471 | 1038 | |
5e3cc1ee | 1039 | v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0); |
b74d24f7 | 1040 | generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); |
2bad8471 | 1041 | |
62b2be59 | 1042 | p9stat_free(st); |
bd238fb4 LI |
1043 | kfree(st); |
1044 | return 0; | |
2bad8471 EVH |
1045 | } |
1046 | ||
1047 | /** | |
1048 | * v9fs_vfs_setattr - set file metadata | |
c1632a0f | 1049 | * @idmap: idmap of the mount |
2bad8471 EVH |
1050 | * @dentry: file whose metadata to set |
1051 | * @iattr: metadata assignment structure | |
1052 | * | |
1053 | */ | |
1054 | ||
c1632a0f | 1055 | static int v9fs_vfs_setattr(struct mnt_idmap *idmap, |
549c7297 | 1056 | struct dentry *dentry, struct iattr *iattr) |
2bad8471 | 1057 | { |
6636b6dc | 1058 | int retval, use_dentry = 0; |
24e42e32 | 1059 | struct inode *inode = d_inode(dentry); |
bd238fb4 | 1060 | struct v9fs_session_info *v9ses; |
66246641 | 1061 | struct p9_fid *fid = NULL; |
bd238fb4 | 1062 | struct p9_wstat wstat; |
2bad8471 | 1063 | |
5d385153 | 1064 | p9_debug(P9_DEBUG_VFS, "\n"); |
c1632a0f | 1065 | retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); |
059c138b AK |
1066 | if (retval) |
1067 | return retval; | |
1068 | ||
bd238fb4 | 1069 | retval = -EPERM; |
42869c8a | 1070 | v9ses = v9fs_dentry2v9ses(dentry); |
66246641 JW |
1071 | if (iattr->ia_valid & ATTR_FILE) { |
1072 | fid = iattr->ia_file->private_data; | |
1073 | WARN_ON(!fid); | |
1074 | } | |
6636b6dc | 1075 | if (!fid) { |
66246641 | 1076 | fid = v9fs_fid_lookup(dentry); |
6636b6dc JW |
1077 | use_dentry = 1; |
1078 | } | |
6e195b0f | 1079 | if (IS_ERR(fid)) |
da977b2c | 1080 | return PTR_ERR(fid); |
2bad8471 | 1081 | |
531b1094 | 1082 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1083 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1084 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1085 | |
1086 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1087 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1088 | |
1089 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1090 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1091 | |
1092 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1093 | wstat.length = iattr->ia_size; |
2bad8471 | 1094 | |
dd6102fb | 1095 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1096 | if (iattr->ia_valid & ATTR_UID) |
1097 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1098 | |
531b1094 LI |
1099 | if (iattr->ia_valid & ATTR_GID) |
1100 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 | 1101 | } |
059c138b | 1102 | |
3dc5436a | 1103 | /* Write all dirty data */ |
d9bc0d11 EVH |
1104 | if (d_is_reg(dentry)) { |
1105 | retval = filemap_fdatawrite(inode->i_mapping); | |
1106 | if (retval) | |
1107 | p9_debug(P9_DEBUG_ERROR, | |
1108 | "flushing writeback during setattr returned %d\n", retval); | |
1109 | } | |
3dc5436a | 1110 | |
f10fc50f | 1111 | retval = p9_client_wstat(fid, &wstat); |
6636b6dc JW |
1112 | |
1113 | if (use_dentry) | |
b48dbb99 | 1114 | p9_fid_put(fid); |
6636b6dc | 1115 | |
f10fc50f AK |
1116 | if (retval < 0) |
1117 | return retval; | |
059c138b AK |
1118 | |
1119 | if ((iattr->ia_valid & ATTR_SIZE) && | |
d9bc0d11 | 1120 | iattr->ia_size != i_size_read(inode)) { |
24e42e32 | 1121 | truncate_setsize(inode, iattr->ia_size); |
1543b4c5 EVH |
1122 | truncate_pagecache(inode, iattr->ia_size); |
1123 | ||
4eb31178 EVH |
1124 | #ifdef CONFIG_9P_FSCACHE |
1125 | if (v9ses->cache & CACHE_FSCACHE) { | |
1126 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
1127 | ||
d9bc0d11 | 1128 | fscache_resize_cookie(v9fs_inode_cookie(v9inode), iattr->ia_size); |
4eb31178 EVH |
1129 | } |
1130 | #endif | |
24e42e32 | 1131 | } |
059c138b | 1132 | |
24e42e32 | 1133 | v9fs_invalidate_inode_attr(inode); |
2bad8471 | 1134 | |
c1632a0f | 1135 | setattr_copy(&nop_mnt_idmap, inode, iattr); |
24e42e32 | 1136 | mark_inode_dirty(inode); |
1025774c | 1137 | return 0; |
2bad8471 EVH |
1138 | } |
1139 | ||
1140 | /** | |
531b1094 LI |
1141 | * v9fs_stat2inode - populate an inode structure with mistat info |
1142 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1143 | * @inode: inode to populate |
1144 | * @sb: superblock of filesystem | |
5e3cc1ee | 1145 | * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
2bad8471 EVH |
1146 | * |
1147 | */ | |
1148 | ||
1149 | void | |
51a87c55 | 1150 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
5e3cc1ee | 1151 | struct super_block *sb, unsigned int flags) |
2bad8471 | 1152 | { |
3eda0de6 | 1153 | umode_t mode; |
2bad8471 | 1154 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
b3cbea03 | 1155 | struct v9fs_inode *v9inode = V9FS_I(inode); |
2bad8471 | 1156 | |
bfe86848 | 1157 | set_nlink(inode, 1); |
2bad8471 | 1158 | |
531b1094 LI |
1159 | inode->i_atime.tv_sec = stat->atime; |
1160 | inode->i_mtime.tv_sec = stat->mtime; | |
1161 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1162 | |
bd32b82d LI |
1163 | inode->i_uid = v9ses->dfltuid; |
1164 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1165 | |
dd6102fb | 1166 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1167 | inode->i_uid = stat->n_uid; |
1168 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1169 | } |
5717144a | 1170 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
9652c732 AV |
1171 | if (v9fs_proto_dotu(v9ses)) { |
1172 | unsigned int i_nlink; | |
5717144a | 1173 | /* |
9652c732 AV |
1174 | * Hadlink support got added later to the .u extension. |
1175 | * So there can be a server out there that doesn't | |
1176 | * support this even with .u extension. That would | |
1177 | * just leave us with stat->extension being an empty | |
1178 | * string, though. | |
5717144a | 1179 | */ |
5717144a | 1180 | /* HARDLINKCOUNT %u */ |
9652c732 AV |
1181 | if (sscanf(stat->extension, |
1182 | " HARDLINKCOUNT %u", &i_nlink) == 1) | |
bfe86848 | 1183 | set_nlink(inode, i_nlink); |
5717144a AK |
1184 | } |
1185 | } | |
df345c67 | 1186 | mode = p9mode2perm(v9ses, stat); |
45089142 AK |
1187 | mode |= inode->i_mode & ~S_IALLUGO; |
1188 | inode->i_mode = mode; | |
2bad8471 | 1189 | |
5e3cc1ee HT |
1190 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
1191 | v9fs_i_size_write(inode, stat->length); | |
bd238fb4 | 1192 | /* not real number of blocks, but 512 byte ones ... */ |
5e3cc1ee | 1193 | inode->i_blocks = (stat->length + 512 - 1) >> 9; |
b3cbea03 | 1194 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
2bad8471 EVH |
1195 | } |
1196 | ||
1197 | /** | |
1198 | * v9fs_qid2ino - convert qid into inode number | |
1199 | * @qid: qid to hash | |
1200 | * | |
1201 | * BUG: potential for inode number collisions? | |
1202 | */ | |
1203 | ||
bd238fb4 | 1204 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1205 | { |
1206 | u64 path = qid->path + 2; | |
1207 | ino_t i = 0; | |
1208 | ||
1209 | if (sizeof(ino_t) == sizeof(path)) | |
1210 | memcpy(&i, &path, sizeof(ino_t)); | |
1211 | else | |
1212 | i = (ino_t) (path ^ (path >> 32)); | |
1213 | ||
1214 | return i; | |
1215 | } | |
1216 | ||
2bad8471 | 1217 | /** |
6b255391 | 1218 | * v9fs_vfs_get_link - follow a symlink path |
2bad8471 | 1219 | * @dentry: dentry for symlink |
6b255391 | 1220 | * @inode: inode for symlink |
fceef393 | 1221 | * @done: delayed call for when we are done with the return value |
2bad8471 EVH |
1222 | */ |
1223 | ||
6b255391 | 1224 | static const char *v9fs_vfs_get_link(struct dentry *dentry, |
fceef393 AV |
1225 | struct inode *inode, |
1226 | struct delayed_call *done) | |
2bad8471 | 1227 | { |
6b255391 AV |
1228 | struct v9fs_session_info *v9ses; |
1229 | struct p9_fid *fid; | |
51a87c55 | 1230 | struct p9_wstat *st; |
680baacb | 1231 | char *res; |
2bad8471 | 1232 | |
6b255391 AV |
1233 | if (!dentry) |
1234 | return ERR_PTR(-ECHILD); | |
1235 | ||
1236 | v9ses = v9fs_dentry2v9ses(dentry); | |
e5690f26 DM |
1237 | if (!v9fs_proto_dotu(v9ses)) |
1238 | return ERR_PTR(-EBADF); | |
1239 | ||
90e4fc88 | 1240 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
e5690f26 | 1241 | fid = v9fs_fid_lookup(dentry); |
90e4fc88 | 1242 | |
ba17674f | 1243 | if (IS_ERR(fid)) |
90e4fc88 | 1244 | return ERR_CAST(fid); |
2bad8471 | 1245 | |
bd238fb4 | 1246 | st = p9_client_stat(fid); |
b48dbb99 | 1247 | p9_fid_put(fid); |
bd238fb4 | 1248 | if (IS_ERR(st)) |
90e4fc88 | 1249 | return ERR_CAST(st); |
2bad8471 | 1250 | |
bd238fb4 | 1251 | if (!(st->mode & P9_DMSYMLINK)) { |
90e4fc88 AV |
1252 | p9stat_free(st); |
1253 | kfree(st); | |
1254 | return ERR_PTR(-EINVAL); | |
2bad8471 | 1255 | } |
680baacb | 1256 | res = st->extension; |
90e4fc88 | 1257 | st->extension = NULL; |
680baacb AV |
1258 | if (strlen(res) >= PATH_MAX) |
1259 | res[PATH_MAX - 1] = '\0'; | |
1260 | ||
62b2be59 | 1261 | p9stat_free(st); |
bd238fb4 | 1262 | kfree(st); |
fceef393 AV |
1263 | set_delayed_call(done, kfree_link, res); |
1264 | return res; | |
2bad8471 EVH |
1265 | } |
1266 | ||
ee443996 EVH |
1267 | /** |
1268 | * v9fs_vfs_mkspecial - create a special file | |
1269 | * @dir: inode to create special file in | |
1270 | * @dentry: dentry to create | |
fd2916bd | 1271 | * @perm: mode to create special file |
ee443996 EVH |
1272 | * @extension: 9p2000.u format extension string representing special file |
1273 | * | |
1274 | */ | |
1275 | ||
531b1094 | 1276 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
c2837de7 | 1277 | u32 perm, const char *extension) |
2bad8471 | 1278 | { |
bd238fb4 | 1279 | struct p9_fid *fid; |
d28c61f0 | 1280 | struct v9fs_session_info *v9ses; |
2bad8471 | 1281 | |
6a3124a3 | 1282 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1283 | if (!v9fs_proto_dotu(v9ses)) { |
5d385153 | 1284 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1285 | return -EPERM; |
2bad8471 EVH |
1286 | } |
1287 | ||
bd238fb4 LI |
1288 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1289 | P9_OREAD); | |
1290 | if (IS_ERR(fid)) | |
1291 | return PTR_ERR(fid); | |
da977b2c | 1292 | |
d28c61f0 | 1293 | v9fs_invalidate_inode_attr(dir); |
b48dbb99 | 1294 | p9_fid_put(fid); |
6a3124a3 | 1295 | return 0; |
531b1094 LI |
1296 | } |
1297 | ||
1298 | /** | |
1299 | * v9fs_vfs_symlink - helper function to create symlinks | |
7a77db95 | 1300 | * @idmap: idmap of the mount |
531b1094 LI |
1301 | * @dir: directory inode containing symlink |
1302 | * @dentry: dentry for symlink | |
1303 | * @symname: symlink data | |
1304 | * | |
ee443996 | 1305 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1306 | * |
1307 | */ | |
1308 | ||
1309 | static int | |
7a77db95 | 1310 | v9fs_vfs_symlink(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 1311 | struct dentry *dentry, const char *symname) |
531b1094 | 1312 | { |
4b8e9923 AV |
1313 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n", |
1314 | dir->i_ino, dentry, symname); | |
531b1094 | 1315 | |
c2837de7 | 1316 | return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); |
531b1094 LI |
1317 | } |
1318 | ||
b46c267e AV |
1319 | #define U32_MAX_DIGITS 10 |
1320 | ||
531b1094 LI |
1321 | /** |
1322 | * v9fs_vfs_link - create a hardlink | |
1323 | * @old_dentry: dentry for file to link to | |
1324 | * @dir: inode destination for new link | |
1325 | * @dentry: dentry for link | |
1326 | * | |
1327 | */ | |
1328 | ||
531b1094 LI |
1329 | static int |
1330 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1331 | struct dentry *dentry) | |
1332 | { | |
1333 | int retval; | |
b46c267e | 1334 | char name[1 + U32_MAX_DIGITS + 2]; /* sign + number + \n + \0 */ |
d28c61f0 | 1335 | struct p9_fid *oldfid; |
531b1094 | 1336 | |
4b8e9923 AV |
1337 | p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n", |
1338 | dir->i_ino, dentry, old_dentry); | |
531b1094 | 1339 | |
da977b2c | 1340 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1341 | if (IS_ERR(oldfid)) |
da977b2c | 1342 | return PTR_ERR(oldfid); |
531b1094 | 1343 | |
16cce6d2 | 1344 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1345 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
c06c066a | 1346 | if (!retval) { |
2b0143b5 | 1347 | v9fs_refresh_inode(oldfid, d_inode(old_dentry)); |
d28c61f0 | 1348 | v9fs_invalidate_inode_attr(dir); |
c06c066a | 1349 | } |
b48dbb99 | 1350 | p9_fid_put(oldfid); |
2bad8471 EVH |
1351 | return retval; |
1352 | } | |
1353 | ||
1354 | /** | |
1355 | * v9fs_vfs_mknod - create a special file | |
5ebb29be | 1356 | * @idmap: idmap of the mount |
2bad8471 EVH |
1357 | * @dir: inode destination for new link |
1358 | * @dentry: dentry for file | |
1359 | * @mode: mode for creation | |
ee443996 | 1360 | * @rdev: device associated with special file |
2bad8471 EVH |
1361 | * |
1362 | */ | |
1363 | ||
1364 | static int | |
5ebb29be | 1365 | v9fs_vfs_mknod(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 1366 | struct dentry *dentry, umode_t mode, dev_t rdev) |
2bad8471 | 1367 | { |
c2837de7 | 1368 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
531b1094 | 1369 | int retval; |
b46c267e | 1370 | char name[2 + U32_MAX_DIGITS + 1 + U32_MAX_DIGITS + 1]; |
c2837de7 | 1371 | u32 perm; |
2bad8471 | 1372 | |
6e195b0f | 1373 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", |
4b8e9923 | 1374 | dir->i_ino, dentry, mode, |
5d385153 | 1375 | MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1376 | |
2bad8471 EVH |
1377 | /* build extension */ |
1378 | if (S_ISBLK(mode)) | |
531b1094 | 1379 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1380 | else if (S_ISCHR(mode)) |
531b1094 | 1381 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
b46c267e | 1382 | else |
75cc5c9b | 1383 | *name = 0; |
2bad8471 | 1384 | |
c2837de7 AV |
1385 | perm = unixmode2p9mode(v9ses, mode); |
1386 | retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); | |
2bad8471 EVH |
1387 | |
1388 | return retval; | |
1389 | } | |
1390 | ||
b3cbea03 AK |
1391 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
1392 | { | |
45089142 AK |
1393 | int umode; |
1394 | dev_t rdev; | |
b3cbea03 AK |
1395 | struct p9_wstat *st; |
1396 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 1397 | unsigned int flags; |
b3cbea03 AK |
1398 | |
1399 | v9ses = v9fs_inode2v9ses(inode); | |
1400 | st = p9_client_stat(fid); | |
1401 | if (IS_ERR(st)) | |
1402 | return PTR_ERR(st); | |
45089142 AK |
1403 | /* |
1404 | * Don't update inode if the file type is different | |
1405 | */ | |
1406 | umode = p9mode2unixmode(v9ses, st, &rdev); | |
6e3e2c43 | 1407 | if (inode_wrong_type(inode, umode)) |
45089142 | 1408 | goto out; |
b3cbea03 | 1409 | |
b3cbea03 AK |
1410 | /* |
1411 | * We don't want to refresh inode->i_size, | |
1412 | * because we may have cached data | |
1413 | */ | |
4eb31178 | 1414 | flags = (v9ses->cache & CACHE_LOOSE) ? |
5e3cc1ee HT |
1415 | V9FS_STAT2INODE_KEEP_ISIZE : 0; |
1416 | v9fs_stat2inode(st, inode, inode->i_sb, flags); | |
45089142 | 1417 | out: |
b3cbea03 AK |
1418 | p9stat_free(st); |
1419 | kfree(st); | |
1420 | return 0; | |
1421 | } | |
1422 | ||
9b6533c9 SK |
1423 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1424 | .create = v9fs_vfs_create, | |
1425 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1426 | .atomic_open = v9fs_vfs_atomic_open, |
9b6533c9 | 1427 | .symlink = v9fs_vfs_symlink, |
50cc42ff | 1428 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1429 | .unlink = v9fs_vfs_unlink, |
1430 | .mkdir = v9fs_vfs_mkdir, | |
1431 | .rmdir = v9fs_vfs_rmdir, | |
1d76e313 | 1432 | .mknod = v9fs_vfs_mknod, |
9b6533c9 SK |
1433 | .rename = v9fs_vfs_rename, |
1434 | .getattr = v9fs_vfs_getattr, | |
1435 | .setattr = v9fs_vfs_setattr, | |
1436 | }; | |
1437 | ||
754661f1 | 1438 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1439 | .create = v9fs_vfs_create, |
1440 | .lookup = v9fs_vfs_lookup, | |
e43ae79c | 1441 | .atomic_open = v9fs_vfs_atomic_open, |
b501611a EVH |
1442 | .unlink = v9fs_vfs_unlink, |
1443 | .mkdir = v9fs_vfs_mkdir, | |
1444 | .rmdir = v9fs_vfs_rmdir, | |
1445 | .mknod = v9fs_vfs_mknod, | |
1446 | .rename = v9fs_vfs_rename, | |
1447 | .getattr = v9fs_vfs_getattr, | |
1448 | .setattr = v9fs_vfs_setattr, | |
1449 | }; | |
1450 | ||
754661f1 | 1451 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1452 | .getattr = v9fs_vfs_getattr, |
1453 | .setattr = v9fs_vfs_setattr, | |
1454 | }; | |
1455 | ||
754661f1 | 1456 | static const struct inode_operations v9fs_symlink_inode_operations = { |
6b255391 | 1457 | .get_link = v9fs_vfs_get_link, |
2bad8471 EVH |
1458 | .getattr = v9fs_vfs_getattr, |
1459 | .setattr = v9fs_vfs_setattr, | |
1460 | }; | |
9b6533c9 | 1461 |