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Commit | Line | Data |
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1f327613 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
53c06f4e | 2 | /* |
53c06f4e AK |
3 | * This file contains vfs inode ops for the 9P2000.L protocol. |
4 | * | |
5 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
6 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
53c06f4e AK |
7 | */ |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/errno.h> | |
11 | #include <linux/fs.h> | |
12 | #include <linux/file.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/stat.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/inet.h> | |
17 | #include <linux/namei.h> | |
18 | #include <linux/idr.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/xattr.h> | |
22 | #include <linux/posix_acl.h> | |
23 | #include <net/9p/9p.h> | |
24 | #include <net/9p/client.h> | |
25 | ||
26 | #include "v9fs.h" | |
27 | #include "v9fs_vfs.h" | |
28 | #include "fid.h" | |
29 | #include "cache.h" | |
30 | #include "xattr.h" | |
31 | #include "acl.h" | |
32 | ||
33 | static int | |
549c7297 CB |
34 | v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir, |
35 | struct dentry *dentry, umode_t omode, dev_t rdev); | |
53c06f4e AK |
36 | |
37 | /** | |
bc868036 DH |
38 | * v9fs_get_fsgid_for_create - Helper function to get the gid for a new object |
39 | * @dir_inode: The directory inode | |
40 | * | |
41 | * Helper function to get the gid for creating a | |
53c06f4e AK |
42 | * new file system object. This checks the S_ISGID to determine the owning |
43 | * group of the new file system object. | |
44 | */ | |
45 | ||
d4ef4e35 | 46 | static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) |
53c06f4e AK |
47 | { |
48 | BUG_ON(dir_inode == NULL); | |
49 | ||
50 | if (dir_inode->i_mode & S_ISGID) { | |
51 | /* set_gid bit is set.*/ | |
52 | return dir_inode->i_gid; | |
53 | } | |
54 | return current_fsgid(); | |
55 | } | |
56 | ||
fd2421f5 AK |
57 | static int v9fs_test_inode_dotl(struct inode *inode, void *data) |
58 | { | |
59 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
60 | struct p9_stat_dotl *st = (struct p9_stat_dotl *)data; | |
61 | ||
62 | /* don't match inode of different type */ | |
6e3e2c43 | 63 | if (inode_wrong_type(inode, st->st_mode)) |
fd2421f5 AK |
64 | return 0; |
65 | ||
66 | if (inode->i_generation != st->st_gen) | |
67 | return 0; | |
68 | ||
69 | /* compare qid details */ | |
70 | if (memcmp(&v9inode->qid.version, | |
71 | &st->qid.version, sizeof(v9inode->qid.version))) | |
72 | return 0; | |
73 | ||
74 | if (v9inode->qid.type != st->qid.type) | |
75 | return 0; | |
8ee03163 TT |
76 | |
77 | if (v9inode->qid.path != st->qid.path) | |
78 | return 0; | |
fd2421f5 AK |
79 | return 1; |
80 | } | |
81 | ||
ed80fcfa AK |
82 | /* Always get a new inode */ |
83 | static int v9fs_test_new_inode_dotl(struct inode *inode, void *data) | |
84 | { | |
85 | return 0; | |
86 | } | |
87 | ||
fd2421f5 AK |
88 | static int v9fs_set_inode_dotl(struct inode *inode, void *data) |
89 | { | |
90 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
91 | struct p9_stat_dotl *st = (struct p9_stat_dotl *)data; | |
92 | ||
93 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
94 | inode->i_generation = st->st_gen; | |
95 | return 0; | |
96 | } | |
97 | ||
5ffc0cb3 AK |
98 | static struct inode *v9fs_qid_iget_dotl(struct super_block *sb, |
99 | struct p9_qid *qid, | |
100 | struct p9_fid *fid, | |
ed80fcfa AK |
101 | struct p9_stat_dotl *st, |
102 | int new) | |
5ffc0cb3 AK |
103 | { |
104 | int retval; | |
105 | unsigned long i_ino; | |
106 | struct inode *inode; | |
107 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
6e195b0f | 108 | int (*test)(struct inode *inode, void *data); |
ed80fcfa AK |
109 | |
110 | if (new) | |
111 | test = v9fs_test_new_inode_dotl; | |
112 | else | |
113 | test = v9fs_test_inode_dotl; | |
5ffc0cb3 AK |
114 | |
115 | i_ino = v9fs_qid2ino(qid); | |
ed80fcfa | 116 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st); |
5ffc0cb3 AK |
117 | if (!inode) |
118 | return ERR_PTR(-ENOMEM); | |
119 | if (!(inode->i_state & I_NEW)) | |
120 | return inode; | |
121 | /* | |
122 | * initialize the inode with the stat info | |
123 | * FIXME!! we may need support for stale inodes | |
124 | * later. | |
125 | */ | |
fd2421f5 | 126 | inode->i_ino = i_ino; |
45089142 AK |
127 | retval = v9fs_init_inode(v9ses, inode, |
128 | st->st_mode, new_decode_dev(st->st_rdev)); | |
5ffc0cb3 AK |
129 | if (retval) |
130 | goto error; | |
131 | ||
5e3cc1ee | 132 | v9fs_stat2inode_dotl(st, inode, 0); |
5ffc0cb3 | 133 | v9fs_cache_inode_get_cookie(inode); |
5ffc0cb3 AK |
134 | retval = v9fs_get_acl(inode, fid); |
135 | if (retval) | |
136 | goto error; | |
137 | ||
138 | unlock_new_inode(inode); | |
139 | return inode; | |
140 | error: | |
0a73d0a2 | 141 | iget_failed(inode); |
5ffc0cb3 AK |
142 | return ERR_PTR(retval); |
143 | ||
144 | } | |
145 | ||
53c06f4e | 146 | struct inode * |
a78ce05d | 147 | v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 148 | struct super_block *sb, int new) |
53c06f4e | 149 | { |
53c06f4e | 150 | struct p9_stat_dotl *st; |
5ffc0cb3 | 151 | struct inode *inode = NULL; |
53c06f4e | 152 | |
fd2421f5 | 153 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN); |
53c06f4e AK |
154 | if (IS_ERR(st)) |
155 | return ERR_CAST(st); | |
156 | ||
ed80fcfa | 157 | inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new); |
53c06f4e | 158 | kfree(st); |
5ffc0cb3 | 159 | return inode; |
53c06f4e AK |
160 | } |
161 | ||
f88657ce AK |
162 | struct dotl_openflag_map { |
163 | int open_flag; | |
164 | int dotl_flag; | |
165 | }; | |
166 | ||
167 | static int v9fs_mapped_dotl_flags(int flags) | |
168 | { | |
169 | int i; | |
170 | int rflags = 0; | |
171 | struct dotl_openflag_map dotl_oflag_map[] = { | |
172 | { O_CREAT, P9_DOTL_CREATE }, | |
173 | { O_EXCL, P9_DOTL_EXCL }, | |
174 | { O_NOCTTY, P9_DOTL_NOCTTY }, | |
f88657ce AK |
175 | { O_APPEND, P9_DOTL_APPEND }, |
176 | { O_NONBLOCK, P9_DOTL_NONBLOCK }, | |
177 | { O_DSYNC, P9_DOTL_DSYNC }, | |
178 | { FASYNC, P9_DOTL_FASYNC }, | |
179 | { O_DIRECT, P9_DOTL_DIRECT }, | |
180 | { O_LARGEFILE, P9_DOTL_LARGEFILE }, | |
181 | { O_DIRECTORY, P9_DOTL_DIRECTORY }, | |
182 | { O_NOFOLLOW, P9_DOTL_NOFOLLOW }, | |
183 | { O_NOATIME, P9_DOTL_NOATIME }, | |
184 | { O_CLOEXEC, P9_DOTL_CLOEXEC }, | |
185 | { O_SYNC, P9_DOTL_SYNC}, | |
186 | }; | |
187 | for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { | |
188 | if (flags & dotl_oflag_map[i].open_flag) | |
189 | rflags |= dotl_oflag_map[i].dotl_flag; | |
190 | } | |
191 | return rflags; | |
192 | } | |
193 | ||
194 | /** | |
195 | * v9fs_open_to_dotl_flags- convert Linux specific open flags to | |
196 | * plan 9 open flag. | |
197 | * @flags: flags to convert | |
198 | */ | |
199 | int v9fs_open_to_dotl_flags(int flags) | |
200 | { | |
201 | int rflags = 0; | |
202 | ||
203 | /* | |
204 | * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY | |
205 | * and P9_DOTL_NOACCESS | |
206 | */ | |
207 | rflags |= flags & O_ACCMODE; | |
208 | rflags |= v9fs_mapped_dotl_flags(flags); | |
209 | ||
210 | return rflags; | |
211 | } | |
212 | ||
53c06f4e AK |
213 | /** |
214 | * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. | |
bc868036 | 215 | * @mnt_userns: The user namespace of the mount |
53c06f4e AK |
216 | * @dir: directory inode that is being created |
217 | * @dentry: dentry that is being deleted | |
fd2916bd | 218 | * @omode: create permissions |
bc868036 | 219 | * @excl: True if the file must not yet exist |
53c06f4e AK |
220 | * |
221 | */ | |
53c06f4e | 222 | static int |
549c7297 CB |
223 | v9fs_vfs_create_dotl(struct user_namespace *mnt_userns, struct inode *dir, |
224 | struct dentry *dentry, umode_t omode, bool excl) | |
e43ae79c | 225 | { |
549c7297 | 226 | return v9fs_vfs_mknod_dotl(mnt_userns, dir, dentry, omode, 0); |
e43ae79c MS |
227 | } |
228 | ||
d9585277 | 229 | static int |
e43ae79c | 230 | v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry, |
6e195b0f | 231 | struct file *file, unsigned int flags, umode_t omode) |
53c06f4e AK |
232 | { |
233 | int err = 0; | |
d4ef4e35 | 234 | kgid_t gid; |
d3fb6120 | 235 | umode_t mode; |
7880b43b | 236 | const unsigned char *name = NULL; |
53c06f4e AK |
237 | struct p9_qid qid; |
238 | struct inode *inode; | |
6b39f6d2 AK |
239 | struct p9_fid *fid = NULL; |
240 | struct v9fs_inode *v9inode; | |
dafbe689 | 241 | struct p9_fid *dfid = NULL, *ofid = NULL, *inode_fid = NULL; |
6b39f6d2 | 242 | struct v9fs_session_info *v9ses; |
53c06f4e | 243 | struct posix_acl *pacl = NULL, *dacl = NULL; |
e43ae79c | 244 | struct dentry *res = NULL; |
53c06f4e | 245 | |
00699ad8 | 246 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 247 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 248 | if (IS_ERR(res)) |
d9585277 | 249 | return PTR_ERR(res); |
e43ae79c MS |
250 | |
251 | if (res) | |
252 | dentry = res; | |
253 | } | |
254 | ||
255 | /* Only creates */ | |
2b0143b5 | 256 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
b6f4bee0 | 257 | return finish_no_open(file, res); |
53c06f4e | 258 | |
e43ae79c MS |
259 | v9ses = v9fs_inode2v9ses(dir); |
260 | ||
7880b43b | 261 | name = dentry->d_name.name; |
6e195b0f | 262 | p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n", |
5d385153 | 263 | name, flags, omode); |
53c06f4e | 264 | |
77d5a6b7 | 265 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
266 | if (IS_ERR(dfid)) { |
267 | err = PTR_ERR(dfid); | |
5d385153 | 268 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
d9585277 | 269 | goto out; |
53c06f4e AK |
270 | } |
271 | ||
272 | /* clone a fid to use for creation */ | |
7d50a29f | 273 | ofid = clone_fid(dfid); |
53c06f4e AK |
274 | if (IS_ERR(ofid)) { |
275 | err = PTR_ERR(ofid); | |
5d385153 | 276 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
d9585277 | 277 | goto out; |
53c06f4e AK |
278 | } |
279 | ||
280 | gid = v9fs_get_fsgid_for_create(dir); | |
281 | ||
282 | mode = omode; | |
283 | /* Update mode based on ACL value */ | |
284 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
285 | if (err) { | |
5d385153 JP |
286 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n", |
287 | err); | |
dafbe689 | 288 | goto out; |
53c06f4e | 289 | } |
f88657ce AK |
290 | err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags), |
291 | mode, gid, &qid); | |
53c06f4e | 292 | if (err < 0) { |
5d385153 JP |
293 | p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n", |
294 | err); | |
dafbe689 | 295 | goto out; |
53c06f4e | 296 | } |
d28c61f0 | 297 | v9fs_invalidate_inode_attr(dir); |
53c06f4e | 298 | |
af7542fc AK |
299 | /* instantiate inode and assign the unopened fid to the dentry */ |
300 | fid = p9_client_walk(dfid, 1, &name, 1); | |
301 | if (IS_ERR(fid)) { | |
302 | err = PTR_ERR(fid); | |
5d385153 | 303 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
dafbe689 | 304 | goto out; |
53c06f4e | 305 | } |
ed80fcfa | 306 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
af7542fc AK |
307 | if (IS_ERR(inode)) { |
308 | err = PTR_ERR(inode); | |
5d385153 | 309 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
dafbe689 | 310 | goto out; |
af7542fc | 311 | } |
3592ac44 AV |
312 | /* Now set the ACL based on the default value */ |
313 | v9fs_set_create_acl(inode, fid, dacl, pacl); | |
314 | ||
dafbe689 | 315 | v9fs_fid_add(dentry, &fid); |
5441ae5e | 316 | d_instantiate(dentry, inode); |
af7542fc | 317 | |
6b39f6d2 | 318 | v9inode = V9FS_I(inode); |
5a7e0a8c | 319 | mutex_lock(&v9inode->v_mutex); |
fb89b45c DM |
320 | if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && |
321 | !v9inode->writeback_fid && | |
7add697a | 322 | ((flags & O_ACCMODE) != O_RDONLY)) { |
3cf387d7 | 323 | /* |
6b39f6d2 | 324 | * clone a fid and add it to writeback_fid |
3cf387d7 AK |
325 | * we do it during open time instead of |
326 | * page dirty time via write_begin/page_mkwrite | |
327 | * because we want write after unlink usecase | |
328 | * to work. | |
329 | */ | |
330 | inode_fid = v9fs_writeback_fid(dentry); | |
331 | if (IS_ERR(inode_fid)) { | |
332 | err = PTR_ERR(inode_fid); | |
5a7e0a8c | 333 | mutex_unlock(&v9inode->v_mutex); |
dafbe689 | 334 | goto out; |
3cf387d7 | 335 | } |
6b39f6d2 | 336 | v9inode->writeback_fid = (void *) inode_fid; |
3cf387d7 | 337 | } |
5a7e0a8c | 338 | mutex_unlock(&v9inode->v_mutex); |
af7542fc | 339 | /* Since we are opening a file, assign the open fid to the file */ |
be12af3e | 340 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 341 | if (err) |
dafbe689 | 342 | goto out; |
30d90494 | 343 | file->private_data = ofid; |
fb89b45c | 344 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
24e42e32 DH |
345 | fscache_use_cookie(v9fs_inode_cookie(v9inode), |
346 | file->f_mode & FMODE_WRITE); | |
dafbe689 | 347 | v9fs_open_fid_add(inode, &ofid); |
73a09dd9 | 348 | file->f_mode |= FMODE_CREATED; |
e43ae79c | 349 | out: |
dafbe689 DM |
350 | p9_fid_put(dfid); |
351 | p9_fid_put(ofid); | |
352 | p9_fid_put(fid); | |
5fa6300a | 353 | v9fs_put_acl(dacl, pacl); |
e43ae79c | 354 | dput(res); |
d9585277 | 355 | return err; |
53c06f4e AK |
356 | } |
357 | ||
358 | /** | |
359 | * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory | |
bc868036 | 360 | * @mnt_userns: The user namespace of the mount |
53c06f4e AK |
361 | * @dir: inode that is being unlinked |
362 | * @dentry: dentry that is being unlinked | |
fd2916bd | 363 | * @omode: mode for new directory |
53c06f4e AK |
364 | * |
365 | */ | |
366 | ||
549c7297 CB |
367 | static int v9fs_vfs_mkdir_dotl(struct user_namespace *mnt_userns, |
368 | struct inode *dir, struct dentry *dentry, | |
369 | umode_t omode) | |
53c06f4e AK |
370 | { |
371 | int err; | |
372 | struct v9fs_session_info *v9ses; | |
373 | struct p9_fid *fid = NULL, *dfid = NULL; | |
d4ef4e35 | 374 | kgid_t gid; |
7880b43b | 375 | const unsigned char *name; |
d3fb6120 | 376 | umode_t mode; |
53c06f4e AK |
377 | struct inode *inode; |
378 | struct p9_qid qid; | |
53c06f4e AK |
379 | struct posix_acl *dacl = NULL, *pacl = NULL; |
380 | ||
4b8e9923 | 381 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
53c06f4e AK |
382 | err = 0; |
383 | v9ses = v9fs_inode2v9ses(dir); | |
384 | ||
385 | omode |= S_IFDIR; | |
386 | if (dir->i_mode & S_ISGID) | |
387 | omode |= S_ISGID; | |
388 | ||
77d5a6b7 | 389 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
390 | if (IS_ERR(dfid)) { |
391 | err = PTR_ERR(dfid); | |
5d385153 | 392 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
393 | goto error; |
394 | } | |
395 | ||
396 | gid = v9fs_get_fsgid_for_create(dir); | |
397 | mode = omode; | |
398 | /* Update mode based on ACL value */ | |
399 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
400 | if (err) { | |
5d385153 JP |
401 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n", |
402 | err); | |
53c06f4e AK |
403 | goto error; |
404 | } | |
7880b43b | 405 | name = dentry->d_name.name; |
53c06f4e AK |
406 | err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); |
407 | if (err < 0) | |
408 | goto error; | |
3592ac44 AV |
409 | fid = p9_client_walk(dfid, 1, &name, 1); |
410 | if (IS_ERR(fid)) { | |
411 | err = PTR_ERR(fid); | |
412 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
413 | err); | |
3592ac44 AV |
414 | goto error; |
415 | } | |
416 | ||
53c06f4e AK |
417 | /* instantiate inode and assign the unopened fid to the dentry */ |
418 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
ed80fcfa | 419 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
420 | if (IS_ERR(inode)) { |
421 | err = PTR_ERR(inode); | |
5d385153 JP |
422 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", |
423 | err); | |
53c06f4e AK |
424 | goto error; |
425 | } | |
dafbe689 | 426 | v9fs_fid_add(dentry, &fid); |
3592ac44 | 427 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
5441ae5e | 428 | d_instantiate(dentry, inode); |
2ea03e1d | 429 | err = 0; |
53c06f4e AK |
430 | } else { |
431 | /* | |
432 | * Not in cached mode. No need to populate | |
433 | * inode with stat. We need to get an inode | |
434 | * so that we can set the acl with dentry | |
435 | */ | |
45089142 | 436 | inode = v9fs_get_inode(dir->i_sb, mode, 0); |
53c06f4e AK |
437 | if (IS_ERR(inode)) { |
438 | err = PTR_ERR(inode); | |
439 | goto error; | |
440 | } | |
3592ac44 | 441 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
53c06f4e AK |
442 | d_instantiate(dentry, inode); |
443 | } | |
b271ec47 | 444 | inc_nlink(dir); |
d28c61f0 | 445 | v9fs_invalidate_inode_attr(dir); |
53c06f4e | 446 | error: |
dafbe689 | 447 | p9_fid_put(fid); |
5fa6300a | 448 | v9fs_put_acl(dacl, pacl); |
b48dbb99 | 449 | p9_fid_put(dfid); |
53c06f4e AK |
450 | return err; |
451 | } | |
452 | ||
453 | static int | |
549c7297 CB |
454 | v9fs_vfs_getattr_dotl(struct user_namespace *mnt_userns, |
455 | const struct path *path, struct kstat *stat, | |
456 | u32 request_mask, unsigned int flags) | |
53c06f4e | 457 | { |
a528d35e | 458 | struct dentry *dentry = path->dentry; |
53c06f4e AK |
459 | struct v9fs_session_info *v9ses; |
460 | struct p9_fid *fid; | |
461 | struct p9_stat_dotl *st; | |
462 | ||
5d385153 | 463 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 464 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 | 465 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
0d56a451 | 466 | generic_fillattr(&init_user_ns, d_inode(dentry), stat); |
a1211908 AK |
467 | return 0; |
468 | } | |
53c06f4e AK |
469 | fid = v9fs_fid_lookup(dentry); |
470 | if (IS_ERR(fid)) | |
471 | return PTR_ERR(fid); | |
472 | ||
473 | /* Ask for all the fields in stat structure. Server will return | |
474 | * whatever it supports | |
475 | */ | |
476 | ||
477 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
b48dbb99 | 478 | p9_fid_put(fid); |
53c06f4e AK |
479 | if (IS_ERR(st)) |
480 | return PTR_ERR(st); | |
481 | ||
5e3cc1ee | 482 | v9fs_stat2inode_dotl(st, d_inode(dentry), 0); |
0d56a451 | 483 | generic_fillattr(&init_user_ns, d_inode(dentry), stat); |
53c06f4e AK |
484 | /* Change block size to what the server returned */ |
485 | stat->blksize = st->st_blksize; | |
486 | ||
487 | kfree(st); | |
488 | return 0; | |
489 | } | |
490 | ||
f766619d AK |
491 | /* |
492 | * Attribute flags. | |
493 | */ | |
494 | #define P9_ATTR_MODE (1 << 0) | |
495 | #define P9_ATTR_UID (1 << 1) | |
496 | #define P9_ATTR_GID (1 << 2) | |
497 | #define P9_ATTR_SIZE (1 << 3) | |
498 | #define P9_ATTR_ATIME (1 << 4) | |
499 | #define P9_ATTR_MTIME (1 << 5) | |
500 | #define P9_ATTR_CTIME (1 << 6) | |
501 | #define P9_ATTR_ATIME_SET (1 << 7) | |
502 | #define P9_ATTR_MTIME_SET (1 << 8) | |
503 | ||
504 | struct dotl_iattr_map { | |
505 | int iattr_valid; | |
506 | int p9_iattr_valid; | |
507 | }; | |
508 | ||
509 | static int v9fs_mapped_iattr_valid(int iattr_valid) | |
510 | { | |
511 | int i; | |
512 | int p9_iattr_valid = 0; | |
513 | struct dotl_iattr_map dotl_iattr_map[] = { | |
514 | { ATTR_MODE, P9_ATTR_MODE }, | |
515 | { ATTR_UID, P9_ATTR_UID }, | |
516 | { ATTR_GID, P9_ATTR_GID }, | |
517 | { ATTR_SIZE, P9_ATTR_SIZE }, | |
518 | { ATTR_ATIME, P9_ATTR_ATIME }, | |
519 | { ATTR_MTIME, P9_ATTR_MTIME }, | |
520 | { ATTR_CTIME, P9_ATTR_CTIME }, | |
521 | { ATTR_ATIME_SET, P9_ATTR_ATIME_SET }, | |
522 | { ATTR_MTIME_SET, P9_ATTR_MTIME_SET }, | |
523 | }; | |
524 | for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) { | |
525 | if (iattr_valid & dotl_iattr_map[i].iattr_valid) | |
526 | p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid; | |
527 | } | |
528 | return p9_iattr_valid; | |
529 | } | |
530 | ||
53c06f4e AK |
531 | /** |
532 | * v9fs_vfs_setattr_dotl - set file metadata | |
bc868036 | 533 | * @mnt_userns: The user namespace of the mount |
53c06f4e AK |
534 | * @dentry: file whose metadata to set |
535 | * @iattr: metadata assignment structure | |
536 | * | |
537 | */ | |
538 | ||
549c7297 CB |
539 | int v9fs_vfs_setattr_dotl(struct user_namespace *mnt_userns, |
540 | struct dentry *dentry, struct iattr *iattr) | |
53c06f4e | 541 | { |
6636b6dc | 542 | int retval, use_dentry = 0; |
66246641 | 543 | struct p9_fid *fid = NULL; |
3cb6ee99 CB |
544 | struct p9_iattr_dotl p9attr = { |
545 | .uid = INVALID_UID, | |
546 | .gid = INVALID_GID, | |
547 | }; | |
2b0143b5 | 548 | struct inode *inode = d_inode(dentry); |
53c06f4e | 549 | |
5d385153 | 550 | p9_debug(P9_DEBUG_VFS, "\n"); |
53c06f4e | 551 | |
2f221d6f | 552 | retval = setattr_prepare(&init_user_ns, dentry, iattr); |
53c06f4e AK |
553 | if (retval) |
554 | return retval; | |
555 | ||
f766619d | 556 | p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid); |
3cb6ee99 CB |
557 | if (iattr->ia_valid & ATTR_MODE) |
558 | p9attr.mode = iattr->ia_mode; | |
559 | if (iattr->ia_valid & ATTR_UID) | |
560 | p9attr.uid = iattr->ia_uid; | |
561 | if (iattr->ia_valid & ATTR_GID) | |
562 | p9attr.gid = iattr->ia_gid; | |
563 | if (iattr->ia_valid & ATTR_SIZE) | |
564 | p9attr.size = iattr->ia_size; | |
565 | if (iattr->ia_valid & ATTR_ATIME_SET) { | |
566 | p9attr.atime_sec = iattr->ia_atime.tv_sec; | |
567 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; | |
568 | } | |
569 | if (iattr->ia_valid & ATTR_MTIME_SET) { | |
570 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; | |
571 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; | |
572 | } | |
53c06f4e | 573 | |
66246641 JW |
574 | if (iattr->ia_valid & ATTR_FILE) { |
575 | fid = iattr->ia_file->private_data; | |
576 | WARN_ON(!fid); | |
577 | } | |
6636b6dc | 578 | if (!fid) { |
66246641 | 579 | fid = v9fs_fid_lookup(dentry); |
6636b6dc JW |
580 | use_dentry = 1; |
581 | } | |
53c06f4e AK |
582 | if (IS_ERR(fid)) |
583 | return PTR_ERR(fid); | |
584 | ||
3dc5436a | 585 | /* Write all dirty data */ |
be308f07 AV |
586 | if (S_ISREG(inode->i_mode)) |
587 | filemap_write_and_wait(inode->i_mapping); | |
3dc5436a | 588 | |
f10fc50f | 589 | retval = p9_client_setattr(fid, &p9attr); |
6636b6dc JW |
590 | if (retval < 0) { |
591 | if (use_dentry) | |
b48dbb99 | 592 | p9_fid_put(fid); |
f10fc50f | 593 | return retval; |
6636b6dc | 594 | } |
53c06f4e | 595 | |
059c138b | 596 | if ((iattr->ia_valid & ATTR_SIZE) && |
be308f07 AV |
597 | iattr->ia_size != i_size_read(inode)) |
598 | truncate_setsize(inode, iattr->ia_size); | |
059c138b | 599 | |
be308f07 | 600 | v9fs_invalidate_inode_attr(inode); |
2f221d6f | 601 | setattr_copy(&init_user_ns, inode, iattr); |
be308f07 | 602 | mark_inode_dirty(inode); |
53c06f4e AK |
603 | if (iattr->ia_valid & ATTR_MODE) { |
604 | /* We also want to update ACL when we update mode bits */ | |
be308f07 | 605 | retval = v9fs_acl_chmod(inode, fid); |
6636b6dc JW |
606 | if (retval < 0) { |
607 | if (use_dentry) | |
b48dbb99 | 608 | p9_fid_put(fid); |
53c06f4e | 609 | return retval; |
6636b6dc | 610 | } |
53c06f4e | 611 | } |
6636b6dc | 612 | if (use_dentry) |
b48dbb99 | 613 | p9_fid_put(fid); |
6636b6dc | 614 | |
53c06f4e AK |
615 | return 0; |
616 | } | |
617 | ||
618 | /** | |
619 | * v9fs_stat2inode_dotl - populate an inode structure with stat info | |
620 | * @stat: stat structure | |
621 | * @inode: inode to populate | |
5e3cc1ee | 622 | * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
53c06f4e AK |
623 | * |
624 | */ | |
625 | ||
626 | void | |
5e3cc1ee HT |
627 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode, |
628 | unsigned int flags) | |
53c06f4e | 629 | { |
3eda0de6 | 630 | umode_t mode; |
b3cbea03 | 631 | struct v9fs_inode *v9inode = V9FS_I(inode); |
53c06f4e AK |
632 | |
633 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { | |
634 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
635 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
636 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
637 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
638 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
639 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
640 | inode->i_uid = stat->st_uid; | |
641 | inode->i_gid = stat->st_gid; | |
bfe86848 | 642 | set_nlink(inode, stat->st_nlink); |
53c06f4e | 643 | |
45089142 AK |
644 | mode = stat->st_mode & S_IALLUGO; |
645 | mode |= inode->i_mode & ~S_IALLUGO; | |
646 | inode->i_mode = mode; | |
53c06f4e | 647 | |
5e3cc1ee HT |
648 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
649 | v9fs_i_size_write(inode, stat->st_size); | |
53c06f4e AK |
650 | inode->i_blocks = stat->st_blocks; |
651 | } else { | |
652 | if (stat->st_result_mask & P9_STATS_ATIME) { | |
653 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
654 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
655 | } | |
656 | if (stat->st_result_mask & P9_STATS_MTIME) { | |
657 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
658 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
659 | } | |
660 | if (stat->st_result_mask & P9_STATS_CTIME) { | |
661 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
662 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
663 | } | |
664 | if (stat->st_result_mask & P9_STATS_UID) | |
665 | inode->i_uid = stat->st_uid; | |
666 | if (stat->st_result_mask & P9_STATS_GID) | |
667 | inode->i_gid = stat->st_gid; | |
668 | if (stat->st_result_mask & P9_STATS_NLINK) | |
bfe86848 | 669 | set_nlink(inode, stat->st_nlink); |
53c06f4e | 670 | if (stat->st_result_mask & P9_STATS_MODE) { |
b577d0cd AV |
671 | mode = stat->st_mode & S_IALLUGO; |
672 | mode |= inode->i_mode & ~S_IALLUGO; | |
673 | inode->i_mode = mode; | |
53c06f4e | 674 | } |
5e3cc1ee HT |
675 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) && |
676 | stat->st_result_mask & P9_STATS_SIZE) | |
677 | v9fs_i_size_write(inode, stat->st_size); | |
53c06f4e AK |
678 | if (stat->st_result_mask & P9_STATS_BLOCKS) |
679 | inode->i_blocks = stat->st_blocks; | |
680 | } | |
681 | if (stat->st_result_mask & P9_STATS_GEN) | |
fd2421f5 | 682 | inode->i_generation = stat->st_gen; |
53c06f4e AK |
683 | |
684 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION | |
685 | * because the inode structure does not have fields for them. | |
686 | */ | |
b3cbea03 | 687 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
53c06f4e AK |
688 | } |
689 | ||
690 | static int | |
549c7297 CB |
691 | v9fs_vfs_symlink_dotl(struct user_namespace *mnt_userns, struct inode *dir, |
692 | struct dentry *dentry, const char *symname) | |
53c06f4e | 693 | { |
53c06f4e | 694 | int err; |
d4ef4e35 | 695 | kgid_t gid; |
7880b43b | 696 | const unsigned char *name; |
d28c61f0 AK |
697 | struct p9_qid qid; |
698 | struct inode *inode; | |
699 | struct p9_fid *dfid; | |
700 | struct p9_fid *fid = NULL; | |
701 | struct v9fs_session_info *v9ses; | |
53c06f4e | 702 | |
7880b43b | 703 | name = dentry->d_name.name; |
5d385153 | 704 | p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname); |
53c06f4e AK |
705 | v9ses = v9fs_inode2v9ses(dir); |
706 | ||
77d5a6b7 | 707 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
708 | if (IS_ERR(dfid)) { |
709 | err = PTR_ERR(dfid); | |
5d385153 | 710 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
711 | return err; |
712 | } | |
713 | ||
714 | gid = v9fs_get_fsgid_for_create(dir); | |
715 | ||
716 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ | |
7880b43b | 717 | err = p9_client_symlink(dfid, name, symname, gid, &qid); |
53c06f4e AK |
718 | |
719 | if (err < 0) { | |
5d385153 | 720 | p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); |
53c06f4e AK |
721 | goto error; |
722 | } | |
723 | ||
d28c61f0 | 724 | v9fs_invalidate_inode_attr(dir); |
fb89b45c | 725 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
53c06f4e AK |
726 | /* Now walk from the parent so we can get an unopened fid. */ |
727 | fid = p9_client_walk(dfid, 1, &name, 1); | |
728 | if (IS_ERR(fid)) { | |
729 | err = PTR_ERR(fid); | |
5d385153 JP |
730 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", |
731 | err); | |
53c06f4e AK |
732 | goto error; |
733 | } | |
734 | ||
735 | /* instantiate inode and assign the unopened fid to dentry */ | |
ed80fcfa | 736 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
737 | if (IS_ERR(inode)) { |
738 | err = PTR_ERR(inode); | |
5d385153 JP |
739 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", |
740 | err); | |
53c06f4e AK |
741 | goto error; |
742 | } | |
dafbe689 | 743 | v9fs_fid_add(dentry, &fid); |
5441ae5e | 744 | d_instantiate(dentry, inode); |
2ea03e1d | 745 | err = 0; |
53c06f4e AK |
746 | } else { |
747 | /* Not in cached mode. No need to populate inode with stat */ | |
45089142 | 748 | inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0); |
53c06f4e AK |
749 | if (IS_ERR(inode)) { |
750 | err = PTR_ERR(inode); | |
751 | goto error; | |
752 | } | |
53c06f4e AK |
753 | d_instantiate(dentry, inode); |
754 | } | |
755 | ||
756 | error: | |
dafbe689 | 757 | p9_fid_put(fid); |
b48dbb99 | 758 | p9_fid_put(dfid); |
53c06f4e AK |
759 | return err; |
760 | } | |
761 | ||
762 | /** | |
763 | * v9fs_vfs_link_dotl - create a hardlink for dotl | |
764 | * @old_dentry: dentry for file to link to | |
765 | * @dir: inode destination for new link | |
766 | * @dentry: dentry for link | |
767 | * | |
768 | */ | |
769 | ||
770 | static int | |
771 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, | |
772 | struct dentry *dentry) | |
773 | { | |
774 | int err; | |
d28c61f0 AK |
775 | struct p9_fid *dfid, *oldfid; |
776 | struct v9fs_session_info *v9ses; | |
53c06f4e | 777 | |
4b8e9923 AV |
778 | p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n", |
779 | dir->i_ino, old_dentry, dentry); | |
53c06f4e AK |
780 | |
781 | v9ses = v9fs_inode2v9ses(dir); | |
77d5a6b7 | 782 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
783 | if (IS_ERR(dfid)) |
784 | return PTR_ERR(dfid); | |
785 | ||
786 | oldfid = v9fs_fid_lookup(old_dentry); | |
6636b6dc | 787 | if (IS_ERR(oldfid)) { |
b48dbb99 | 788 | p9_fid_put(dfid); |
53c06f4e | 789 | return PTR_ERR(oldfid); |
6636b6dc | 790 | } |
53c06f4e | 791 | |
7880b43b | 792 | err = p9_client_link(dfid, oldfid, dentry->d_name.name); |
53c06f4e | 793 | |
b48dbb99 DM |
794 | p9_fid_put(dfid); |
795 | p9_fid_put(oldfid); | |
53c06f4e | 796 | if (err < 0) { |
5d385153 | 797 | p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); |
53c06f4e AK |
798 | return err; |
799 | } | |
800 | ||
d28c61f0 | 801 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
802 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
803 | /* Get the latest stat info from server. */ | |
804 | struct p9_fid *fid; | |
6e195b0f | 805 | |
53c06f4e AK |
806 | fid = v9fs_fid_lookup(old_dentry); |
807 | if (IS_ERR(fid)) | |
808 | return PTR_ERR(fid); | |
809 | ||
2b0143b5 | 810 | v9fs_refresh_inode_dotl(fid, d_inode(old_dentry)); |
b48dbb99 | 811 | p9_fid_put(fid); |
53c06f4e | 812 | } |
2b0143b5 DH |
813 | ihold(d_inode(old_dentry)); |
814 | d_instantiate(dentry, d_inode(old_dentry)); | |
53c06f4e AK |
815 | |
816 | return err; | |
817 | } | |
818 | ||
819 | /** | |
820 | * v9fs_vfs_mknod_dotl - create a special file | |
bc868036 | 821 | * @mnt_userns: The user namespace of the mount |
53c06f4e AK |
822 | * @dir: inode destination for new link |
823 | * @dentry: dentry for file | |
fd2916bd | 824 | * @omode: mode for creation |
53c06f4e AK |
825 | * @rdev: device associated with special file |
826 | * | |
827 | */ | |
828 | static int | |
549c7297 CB |
829 | v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir, |
830 | struct dentry *dentry, umode_t omode, dev_t rdev) | |
53c06f4e AK |
831 | { |
832 | int err; | |
d4ef4e35 | 833 | kgid_t gid; |
7880b43b | 834 | const unsigned char *name; |
d3fb6120 | 835 | umode_t mode; |
53c06f4e AK |
836 | struct v9fs_session_info *v9ses; |
837 | struct p9_fid *fid = NULL, *dfid = NULL; | |
838 | struct inode *inode; | |
53c06f4e | 839 | struct p9_qid qid; |
53c06f4e AK |
840 | struct posix_acl *dacl = NULL, *pacl = NULL; |
841 | ||
6e195b0f | 842 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", |
a455589f | 843 | dir->i_ino, dentry, omode, |
5d385153 | 844 | MAJOR(rdev), MINOR(rdev)); |
53c06f4e | 845 | |
53c06f4e | 846 | v9ses = v9fs_inode2v9ses(dir); |
77d5a6b7 | 847 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
848 | if (IS_ERR(dfid)) { |
849 | err = PTR_ERR(dfid); | |
5d385153 | 850 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
851 | goto error; |
852 | } | |
853 | ||
854 | gid = v9fs_get_fsgid_for_create(dir); | |
855 | mode = omode; | |
856 | /* Update mode based on ACL value */ | |
857 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
858 | if (err) { | |
5d385153 JP |
859 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n", |
860 | err); | |
53c06f4e AK |
861 | goto error; |
862 | } | |
7880b43b | 863 | name = dentry->d_name.name; |
53c06f4e AK |
864 | |
865 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); | |
866 | if (err < 0) | |
867 | goto error; | |
868 | ||
d28c61f0 | 869 | v9fs_invalidate_inode_attr(dir); |
3592ac44 AV |
870 | fid = p9_client_walk(dfid, 1, &name, 1); |
871 | if (IS_ERR(fid)) { | |
872 | err = PTR_ERR(fid); | |
873 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
874 | err); | |
3592ac44 AV |
875 | goto error; |
876 | } | |
877 | ||
53c06f4e AK |
878 | /* instantiate inode and assign the unopened fid to the dentry */ |
879 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
ed80fcfa | 880 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
881 | if (IS_ERR(inode)) { |
882 | err = PTR_ERR(inode); | |
5d385153 JP |
883 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", |
884 | err); | |
53c06f4e AK |
885 | goto error; |
886 | } | |
3592ac44 | 887 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
dafbe689 | 888 | v9fs_fid_add(dentry, &fid); |
5441ae5e | 889 | d_instantiate(dentry, inode); |
2ea03e1d | 890 | err = 0; |
53c06f4e AK |
891 | } else { |
892 | /* | |
893 | * Not in cached mode. No need to populate inode with stat. | |
894 | * socket syscall returns a fd, so we need instantiate | |
895 | */ | |
45089142 | 896 | inode = v9fs_get_inode(dir->i_sb, mode, rdev); |
53c06f4e AK |
897 | if (IS_ERR(inode)) { |
898 | err = PTR_ERR(inode); | |
899 | goto error; | |
900 | } | |
3592ac44 | 901 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
53c06f4e AK |
902 | d_instantiate(dentry, inode); |
903 | } | |
53c06f4e | 904 | error: |
dafbe689 | 905 | p9_fid_put(fid); |
5fa6300a | 906 | v9fs_put_acl(dacl, pacl); |
b48dbb99 | 907 | p9_fid_put(dfid); |
6636b6dc | 908 | |
53c06f4e AK |
909 | return err; |
910 | } | |
911 | ||
53c06f4e | 912 | /** |
6b255391 | 913 | * v9fs_vfs_get_link_dotl - follow a symlink path |
53c06f4e | 914 | * @dentry: dentry for symlink |
6b255391 | 915 | * @inode: inode for symlink |
fceef393 | 916 | * @done: destructor for return value |
53c06f4e AK |
917 | */ |
918 | ||
680baacb | 919 | static const char * |
6b255391 | 920 | v9fs_vfs_get_link_dotl(struct dentry *dentry, |
fceef393 AV |
921 | struct inode *inode, |
922 | struct delayed_call *done) | |
53c06f4e | 923 | { |
6b255391 | 924 | struct p9_fid *fid; |
31b6ceac | 925 | char *target; |
90e4fc88 | 926 | int retval; |
53c06f4e | 927 | |
6b255391 AV |
928 | if (!dentry) |
929 | return ERR_PTR(-ECHILD); | |
930 | ||
4b8e9923 | 931 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
53c06f4e | 932 | |
6b255391 | 933 | fid = v9fs_fid_lookup(dentry); |
90e4fc88 AV |
934 | if (IS_ERR(fid)) |
935 | return ERR_CAST(fid); | |
31b6ceac | 936 | retval = p9_client_readlink(fid, &target); |
b48dbb99 | 937 | p9_fid_put(fid); |
90e4fc88 AV |
938 | if (retval) |
939 | return ERR_PTR(retval); | |
fceef393 AV |
940 | set_delayed_call(done, kfree_link, target); |
941 | return target; | |
53c06f4e AK |
942 | } |
943 | ||
b3cbea03 AK |
944 | int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode) |
945 | { | |
b3cbea03 AK |
946 | struct p9_stat_dotl *st; |
947 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 948 | unsigned int flags; |
b3cbea03 AK |
949 | |
950 | v9ses = v9fs_inode2v9ses(inode); | |
951 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
952 | if (IS_ERR(st)) | |
953 | return PTR_ERR(st); | |
45089142 AK |
954 | /* |
955 | * Don't update inode if the file type is different | |
956 | */ | |
6e3e2c43 | 957 | if (inode_wrong_type(inode, st->st_mode)) |
45089142 | 958 | goto out; |
b3cbea03 | 959 | |
b3cbea03 AK |
960 | /* |
961 | * We don't want to refresh inode->i_size, | |
962 | * because we may have cached data | |
963 | */ | |
5e3cc1ee HT |
964 | flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? |
965 | V9FS_STAT2INODE_KEEP_ISIZE : 0; | |
966 | v9fs_stat2inode_dotl(st, inode, flags); | |
45089142 | 967 | out: |
b3cbea03 AK |
968 | kfree(st); |
969 | return 0; | |
970 | } | |
971 | ||
53c06f4e AK |
972 | const struct inode_operations v9fs_dir_inode_operations_dotl = { |
973 | .create = v9fs_vfs_create_dotl, | |
e43ae79c | 974 | .atomic_open = v9fs_vfs_atomic_open_dotl, |
53c06f4e AK |
975 | .lookup = v9fs_vfs_lookup, |
976 | .link = v9fs_vfs_link_dotl, | |
977 | .symlink = v9fs_vfs_symlink_dotl, | |
978 | .unlink = v9fs_vfs_unlink, | |
979 | .mkdir = v9fs_vfs_mkdir_dotl, | |
980 | .rmdir = v9fs_vfs_rmdir, | |
981 | .mknod = v9fs_vfs_mknod_dotl, | |
982 | .rename = v9fs_vfs_rename, | |
983 | .getattr = v9fs_vfs_getattr_dotl, | |
984 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e | 985 | .listxattr = v9fs_listxattr, |
4e34e719 | 986 | .get_acl = v9fs_iop_get_acl, |
53c06f4e AK |
987 | }; |
988 | ||
989 | const struct inode_operations v9fs_file_inode_operations_dotl = { | |
990 | .getattr = v9fs_vfs_getattr_dotl, | |
991 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e | 992 | .listxattr = v9fs_listxattr, |
4e34e719 | 993 | .get_acl = v9fs_iop_get_acl, |
53c06f4e AK |
994 | }; |
995 | ||
996 | const struct inode_operations v9fs_symlink_inode_operations_dotl = { | |
6b255391 | 997 | .get_link = v9fs_vfs_get_link_dotl, |
53c06f4e AK |
998 | .getattr = v9fs_vfs_getattr_dotl, |
999 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e AK |
1000 | .listxattr = v9fs_listxattr, |
1001 | }; |