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> | |
53c06f4e AK |
18 | #include <linux/sched.h> |
19 | #include <linux/slab.h> | |
20 | #include <linux/xattr.h> | |
21 | #include <linux/posix_acl.h> | |
22 | #include <net/9p/9p.h> | |
23 | #include <net/9p/client.h> | |
24 | ||
25 | #include "v9fs.h" | |
26 | #include "v9fs_vfs.h" | |
27 | #include "fid.h" | |
28 | #include "cache.h" | |
29 | #include "xattr.h" | |
30 | #include "acl.h" | |
31 | ||
32 | static int | |
549c7297 CB |
33 | v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir, |
34 | struct dentry *dentry, umode_t omode, dev_t rdev); | |
53c06f4e AK |
35 | |
36 | /** | |
bc868036 DH |
37 | * v9fs_get_fsgid_for_create - Helper function to get the gid for a new object |
38 | * @dir_inode: The directory inode | |
39 | * | |
40 | * Helper function to get the gid for creating a | |
53c06f4e AK |
41 | * new file system object. This checks the S_ISGID to determine the owning |
42 | * group of the new file system object. | |
43 | */ | |
44 | ||
d4ef4e35 | 45 | static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) |
53c06f4e AK |
46 | { |
47 | BUG_ON(dir_inode == NULL); | |
48 | ||
49 | if (dir_inode->i_mode & S_ISGID) { | |
50 | /* set_gid bit is set.*/ | |
51 | return dir_inode->i_gid; | |
52 | } | |
53 | return current_fsgid(); | |
54 | } | |
55 | ||
fd2421f5 AK |
56 | static int v9fs_test_inode_dotl(struct inode *inode, void *data) |
57 | { | |
58 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
59 | struct p9_stat_dotl *st = (struct p9_stat_dotl *)data; | |
60 | ||
61 | /* don't match inode of different type */ | |
6e3e2c43 | 62 | if (inode_wrong_type(inode, st->st_mode)) |
fd2421f5 AK |
63 | return 0; |
64 | ||
65 | if (inode->i_generation != st->st_gen) | |
66 | return 0; | |
67 | ||
68 | /* compare qid details */ | |
69 | if (memcmp(&v9inode->qid.version, | |
70 | &st->qid.version, sizeof(v9inode->qid.version))) | |
71 | return 0; | |
72 | ||
73 | if (v9inode->qid.type != st->qid.type) | |
74 | return 0; | |
8ee03163 TT |
75 | |
76 | if (v9inode->qid.path != st->qid.path) | |
77 | return 0; | |
fd2421f5 AK |
78 | return 1; |
79 | } | |
80 | ||
ed80fcfa AK |
81 | /* Always get a new inode */ |
82 | static int v9fs_test_new_inode_dotl(struct inode *inode, void *data) | |
83 | { | |
84 | return 0; | |
85 | } | |
86 | ||
fd2421f5 AK |
87 | static int v9fs_set_inode_dotl(struct inode *inode, void *data) |
88 | { | |
89 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
90 | struct p9_stat_dotl *st = (struct p9_stat_dotl *)data; | |
91 | ||
92 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
93 | inode->i_generation = st->st_gen; | |
94 | return 0; | |
95 | } | |
96 | ||
5ffc0cb3 AK |
97 | static struct inode *v9fs_qid_iget_dotl(struct super_block *sb, |
98 | struct p9_qid *qid, | |
99 | struct p9_fid *fid, | |
ed80fcfa AK |
100 | struct p9_stat_dotl *st, |
101 | int new) | |
5ffc0cb3 AK |
102 | { |
103 | int retval; | |
104 | unsigned long i_ino; | |
105 | struct inode *inode; | |
106 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
6e195b0f | 107 | int (*test)(struct inode *inode, void *data); |
ed80fcfa AK |
108 | |
109 | if (new) | |
110 | test = v9fs_test_new_inode_dotl; | |
111 | else | |
112 | test = v9fs_test_inode_dotl; | |
5ffc0cb3 AK |
113 | |
114 | i_ino = v9fs_qid2ino(qid); | |
ed80fcfa | 115 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st); |
5ffc0cb3 AK |
116 | if (!inode) |
117 | return ERR_PTR(-ENOMEM); | |
118 | if (!(inode->i_state & I_NEW)) | |
119 | return inode; | |
120 | /* | |
121 | * initialize the inode with the stat info | |
122 | * FIXME!! we may need support for stale inodes | |
123 | * later. | |
124 | */ | |
fd2421f5 | 125 | inode->i_ino = i_ino; |
45089142 AK |
126 | retval = v9fs_init_inode(v9ses, inode, |
127 | st->st_mode, new_decode_dev(st->st_rdev)); | |
5ffc0cb3 AK |
128 | if (retval) |
129 | goto error; | |
130 | ||
5e3cc1ee | 131 | v9fs_stat2inode_dotl(st, inode, 0); |
5ffc0cb3 | 132 | v9fs_cache_inode_get_cookie(inode); |
5ffc0cb3 AK |
133 | retval = v9fs_get_acl(inode, fid); |
134 | if (retval) | |
135 | goto error; | |
136 | ||
137 | unlock_new_inode(inode); | |
138 | return inode; | |
139 | error: | |
0a73d0a2 | 140 | iget_failed(inode); |
5ffc0cb3 AK |
141 | return ERR_PTR(retval); |
142 | ||
143 | } | |
144 | ||
53c06f4e | 145 | struct inode * |
a78ce05d | 146 | v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 147 | struct super_block *sb, int new) |
53c06f4e | 148 | { |
53c06f4e | 149 | struct p9_stat_dotl *st; |
5ffc0cb3 | 150 | struct inode *inode = NULL; |
53c06f4e | 151 | |
fd2421f5 | 152 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN); |
53c06f4e AK |
153 | if (IS_ERR(st)) |
154 | return ERR_CAST(st); | |
155 | ||
ed80fcfa | 156 | inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new); |
53c06f4e | 157 | kfree(st); |
5ffc0cb3 | 158 | return inode; |
53c06f4e AK |
159 | } |
160 | ||
f88657ce AK |
161 | struct dotl_openflag_map { |
162 | int open_flag; | |
163 | int dotl_flag; | |
164 | }; | |
165 | ||
166 | static int v9fs_mapped_dotl_flags(int flags) | |
167 | { | |
168 | int i; | |
169 | int rflags = 0; | |
170 | struct dotl_openflag_map dotl_oflag_map[] = { | |
171 | { O_CREAT, P9_DOTL_CREATE }, | |
172 | { O_EXCL, P9_DOTL_EXCL }, | |
173 | { O_NOCTTY, P9_DOTL_NOCTTY }, | |
f88657ce AK |
174 | { O_APPEND, P9_DOTL_APPEND }, |
175 | { O_NONBLOCK, P9_DOTL_NONBLOCK }, | |
176 | { O_DSYNC, P9_DOTL_DSYNC }, | |
177 | { FASYNC, P9_DOTL_FASYNC }, | |
178 | { O_DIRECT, P9_DOTL_DIRECT }, | |
179 | { O_LARGEFILE, P9_DOTL_LARGEFILE }, | |
180 | { O_DIRECTORY, P9_DOTL_DIRECTORY }, | |
181 | { O_NOFOLLOW, P9_DOTL_NOFOLLOW }, | |
182 | { O_NOATIME, P9_DOTL_NOATIME }, | |
183 | { O_CLOEXEC, P9_DOTL_CLOEXEC }, | |
184 | { O_SYNC, P9_DOTL_SYNC}, | |
185 | }; | |
186 | for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { | |
187 | if (flags & dotl_oflag_map[i].open_flag) | |
188 | rflags |= dotl_oflag_map[i].dotl_flag; | |
189 | } | |
190 | return rflags; | |
191 | } | |
192 | ||
193 | /** | |
194 | * v9fs_open_to_dotl_flags- convert Linux specific open flags to | |
195 | * plan 9 open flag. | |
196 | * @flags: flags to convert | |
197 | */ | |
198 | int v9fs_open_to_dotl_flags(int flags) | |
199 | { | |
200 | int rflags = 0; | |
201 | ||
202 | /* | |
203 | * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY | |
204 | * and P9_DOTL_NOACCESS | |
205 | */ | |
206 | rflags |= flags & O_ACCMODE; | |
207 | rflags |= v9fs_mapped_dotl_flags(flags); | |
208 | ||
209 | return rflags; | |
210 | } | |
211 | ||
53c06f4e AK |
212 | /** |
213 | * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. | |
bc868036 | 214 | * @mnt_userns: The user namespace of the mount |
53c06f4e AK |
215 | * @dir: directory inode that is being created |
216 | * @dentry: dentry that is being deleted | |
fd2916bd | 217 | * @omode: create permissions |
bc868036 | 218 | * @excl: True if the file must not yet exist |
53c06f4e AK |
219 | * |
220 | */ | |
53c06f4e | 221 | static int |
549c7297 CB |
222 | v9fs_vfs_create_dotl(struct user_namespace *mnt_userns, struct inode *dir, |
223 | struct dentry *dentry, umode_t omode, bool excl) | |
e43ae79c | 224 | { |
549c7297 | 225 | return v9fs_vfs_mknod_dotl(mnt_userns, dir, dentry, omode, 0); |
e43ae79c MS |
226 | } |
227 | ||
d9585277 | 228 | static int |
e43ae79c | 229 | v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry, |
6e195b0f | 230 | struct file *file, unsigned int flags, umode_t omode) |
53c06f4e AK |
231 | { |
232 | int err = 0; | |
d4ef4e35 | 233 | kgid_t gid; |
d3fb6120 | 234 | umode_t mode; |
7880b43b | 235 | const unsigned char *name = NULL; |
53c06f4e AK |
236 | struct p9_qid qid; |
237 | struct inode *inode; | |
6b39f6d2 AK |
238 | struct p9_fid *fid = NULL; |
239 | struct v9fs_inode *v9inode; | |
dafbe689 | 240 | struct p9_fid *dfid = NULL, *ofid = NULL, *inode_fid = NULL; |
6b39f6d2 | 241 | struct v9fs_session_info *v9ses; |
53c06f4e | 242 | struct posix_acl *pacl = NULL, *dacl = NULL; |
e43ae79c | 243 | struct dentry *res = NULL; |
53c06f4e | 244 | |
00699ad8 | 245 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 246 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 247 | if (IS_ERR(res)) |
d9585277 | 248 | return PTR_ERR(res); |
e43ae79c MS |
249 | |
250 | if (res) | |
251 | dentry = res; | |
252 | } | |
253 | ||
254 | /* Only creates */ | |
2b0143b5 | 255 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
b6f4bee0 | 256 | return finish_no_open(file, res); |
53c06f4e | 257 | |
e43ae79c MS |
258 | v9ses = v9fs_inode2v9ses(dir); |
259 | ||
7880b43b | 260 | name = dentry->d_name.name; |
6e195b0f | 261 | p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n", |
5d385153 | 262 | name, flags, omode); |
53c06f4e | 263 | |
77d5a6b7 | 264 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
265 | if (IS_ERR(dfid)) { |
266 | err = PTR_ERR(dfid); | |
5d385153 | 267 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
d9585277 | 268 | goto out; |
53c06f4e AK |
269 | } |
270 | ||
271 | /* clone a fid to use for creation */ | |
7d50a29f | 272 | ofid = clone_fid(dfid); |
53c06f4e AK |
273 | if (IS_ERR(ofid)) { |
274 | err = PTR_ERR(ofid); | |
5d385153 | 275 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
d9585277 | 276 | goto out; |
53c06f4e AK |
277 | } |
278 | ||
279 | gid = v9fs_get_fsgid_for_create(dir); | |
280 | ||
281 | mode = omode; | |
282 | /* Update mode based on ACL value */ | |
283 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
284 | if (err) { | |
5d385153 JP |
285 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n", |
286 | err); | |
dafbe689 | 287 | goto out; |
53c06f4e | 288 | } |
f88657ce AK |
289 | err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags), |
290 | mode, gid, &qid); | |
53c06f4e | 291 | if (err < 0) { |
5d385153 JP |
292 | p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n", |
293 | err); | |
dafbe689 | 294 | goto out; |
53c06f4e | 295 | } |
d28c61f0 | 296 | v9fs_invalidate_inode_attr(dir); |
53c06f4e | 297 | |
af7542fc AK |
298 | /* instantiate inode and assign the unopened fid to the dentry */ |
299 | fid = p9_client_walk(dfid, 1, &name, 1); | |
300 | if (IS_ERR(fid)) { | |
301 | err = PTR_ERR(fid); | |
5d385153 | 302 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
dafbe689 | 303 | goto out; |
53c06f4e | 304 | } |
ed80fcfa | 305 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
af7542fc AK |
306 | if (IS_ERR(inode)) { |
307 | err = PTR_ERR(inode); | |
5d385153 | 308 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
dafbe689 | 309 | goto out; |
af7542fc | 310 | } |
3592ac44 AV |
311 | /* Now set the ACL based on the default value */ |
312 | v9fs_set_create_acl(inode, fid, dacl, pacl); | |
313 | ||
dafbe689 | 314 | v9fs_fid_add(dentry, &fid); |
5441ae5e | 315 | d_instantiate(dentry, inode); |
af7542fc | 316 | |
6b39f6d2 | 317 | v9inode = V9FS_I(inode); |
5a7e0a8c | 318 | mutex_lock(&v9inode->v_mutex); |
fb89b45c DM |
319 | if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) && |
320 | !v9inode->writeback_fid && | |
7add697a | 321 | ((flags & O_ACCMODE) != O_RDONLY)) { |
3cf387d7 | 322 | /* |
6b39f6d2 | 323 | * clone a fid and add it to writeback_fid |
3cf387d7 AK |
324 | * we do it during open time instead of |
325 | * page dirty time via write_begin/page_mkwrite | |
326 | * because we want write after unlink usecase | |
327 | * to work. | |
328 | */ | |
329 | inode_fid = v9fs_writeback_fid(dentry); | |
330 | if (IS_ERR(inode_fid)) { | |
331 | err = PTR_ERR(inode_fid); | |
5a7e0a8c | 332 | mutex_unlock(&v9inode->v_mutex); |
dafbe689 | 333 | goto out; |
3cf387d7 | 334 | } |
6b39f6d2 | 335 | v9inode->writeback_fid = (void *) inode_fid; |
3cf387d7 | 336 | } |
5a7e0a8c | 337 | mutex_unlock(&v9inode->v_mutex); |
af7542fc | 338 | /* Since we are opening a file, assign the open fid to the file */ |
be12af3e | 339 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 340 | if (err) |
dafbe689 | 341 | goto out; |
30d90494 | 342 | file->private_data = ofid; |
fb89b45c | 343 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
24e42e32 DH |
344 | fscache_use_cookie(v9fs_inode_cookie(v9inode), |
345 | file->f_mode & FMODE_WRITE); | |
dafbe689 | 346 | v9fs_open_fid_add(inode, &ofid); |
73a09dd9 | 347 | file->f_mode |= FMODE_CREATED; |
e43ae79c | 348 | out: |
dafbe689 DM |
349 | p9_fid_put(dfid); |
350 | p9_fid_put(ofid); | |
351 | p9_fid_put(fid); | |
5fa6300a | 352 | v9fs_put_acl(dacl, pacl); |
e43ae79c | 353 | dput(res); |
d9585277 | 354 | return err; |
53c06f4e AK |
355 | } |
356 | ||
357 | /** | |
358 | * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory | |
bc868036 | 359 | * @mnt_userns: The user namespace of the mount |
53c06f4e AK |
360 | * @dir: inode that is being unlinked |
361 | * @dentry: dentry that is being unlinked | |
fd2916bd | 362 | * @omode: mode for new directory |
53c06f4e AK |
363 | * |
364 | */ | |
365 | ||
549c7297 CB |
366 | static int v9fs_vfs_mkdir_dotl(struct user_namespace *mnt_userns, |
367 | struct inode *dir, struct dentry *dentry, | |
368 | umode_t omode) | |
53c06f4e AK |
369 | { |
370 | int err; | |
371 | struct v9fs_session_info *v9ses; | |
372 | struct p9_fid *fid = NULL, *dfid = NULL; | |
d4ef4e35 | 373 | kgid_t gid; |
7880b43b | 374 | const unsigned char *name; |
d3fb6120 | 375 | umode_t mode; |
53c06f4e AK |
376 | struct inode *inode; |
377 | struct p9_qid qid; | |
53c06f4e AK |
378 | struct posix_acl *dacl = NULL, *pacl = NULL; |
379 | ||
4b8e9923 | 380 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
53c06f4e AK |
381 | err = 0; |
382 | v9ses = v9fs_inode2v9ses(dir); | |
383 | ||
384 | omode |= S_IFDIR; | |
385 | if (dir->i_mode & S_ISGID) | |
386 | omode |= S_ISGID; | |
387 | ||
77d5a6b7 | 388 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
389 | if (IS_ERR(dfid)) { |
390 | err = PTR_ERR(dfid); | |
5d385153 | 391 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
392 | goto error; |
393 | } | |
394 | ||
395 | gid = v9fs_get_fsgid_for_create(dir); | |
396 | mode = omode; | |
397 | /* Update mode based on ACL value */ | |
398 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
399 | if (err) { | |
5d385153 JP |
400 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n", |
401 | err); | |
53c06f4e AK |
402 | goto error; |
403 | } | |
7880b43b | 404 | name = dentry->d_name.name; |
53c06f4e AK |
405 | err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); |
406 | if (err < 0) | |
407 | goto error; | |
3592ac44 AV |
408 | fid = p9_client_walk(dfid, 1, &name, 1); |
409 | if (IS_ERR(fid)) { | |
410 | err = PTR_ERR(fid); | |
411 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
412 | err); | |
3592ac44 AV |
413 | goto error; |
414 | } | |
415 | ||
53c06f4e AK |
416 | /* instantiate inode and assign the unopened fid to the dentry */ |
417 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
ed80fcfa | 418 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
419 | if (IS_ERR(inode)) { |
420 | err = PTR_ERR(inode); | |
5d385153 JP |
421 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", |
422 | err); | |
53c06f4e AK |
423 | goto error; |
424 | } | |
dafbe689 | 425 | v9fs_fid_add(dentry, &fid); |
3592ac44 | 426 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
5441ae5e | 427 | d_instantiate(dentry, inode); |
2ea03e1d | 428 | err = 0; |
53c06f4e AK |
429 | } else { |
430 | /* | |
431 | * Not in cached mode. No need to populate | |
432 | * inode with stat. We need to get an inode | |
433 | * so that we can set the acl with dentry | |
434 | */ | |
45089142 | 435 | inode = v9fs_get_inode(dir->i_sb, mode, 0); |
53c06f4e AK |
436 | if (IS_ERR(inode)) { |
437 | err = PTR_ERR(inode); | |
438 | goto error; | |
439 | } | |
3592ac44 | 440 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
53c06f4e AK |
441 | d_instantiate(dentry, inode); |
442 | } | |
b271ec47 | 443 | inc_nlink(dir); |
d28c61f0 | 444 | v9fs_invalidate_inode_attr(dir); |
53c06f4e | 445 | error: |
dafbe689 | 446 | p9_fid_put(fid); |
5fa6300a | 447 | v9fs_put_acl(dacl, pacl); |
b48dbb99 | 448 | p9_fid_put(dfid); |
53c06f4e AK |
449 | return err; |
450 | } | |
451 | ||
452 | static int | |
b74d24f7 | 453 | v9fs_vfs_getattr_dotl(struct mnt_idmap *idmap, |
549c7297 CB |
454 | const struct path *path, struct kstat *stat, |
455 | u32 request_mask, unsigned int flags) | |
53c06f4e | 456 | { |
a528d35e | 457 | struct dentry *dentry = path->dentry; |
53c06f4e AK |
458 | struct v9fs_session_info *v9ses; |
459 | struct p9_fid *fid; | |
460 | struct p9_stat_dotl *st; | |
461 | ||
5d385153 | 462 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 463 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 | 464 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
b74d24f7 | 465 | generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); |
a1211908 AK |
466 | return 0; |
467 | } | |
53c06f4e AK |
468 | fid = v9fs_fid_lookup(dentry); |
469 | if (IS_ERR(fid)) | |
470 | return PTR_ERR(fid); | |
471 | ||
472 | /* Ask for all the fields in stat structure. Server will return | |
473 | * whatever it supports | |
474 | */ | |
475 | ||
476 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
b48dbb99 | 477 | p9_fid_put(fid); |
53c06f4e AK |
478 | if (IS_ERR(st)) |
479 | return PTR_ERR(st); | |
480 | ||
5e3cc1ee | 481 | v9fs_stat2inode_dotl(st, d_inode(dentry), 0); |
b74d24f7 | 482 | generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat); |
53c06f4e AK |
483 | /* Change block size to what the server returned */ |
484 | stat->blksize = st->st_blksize; | |
485 | ||
486 | kfree(st); | |
487 | return 0; | |
488 | } | |
489 | ||
f766619d AK |
490 | /* |
491 | * Attribute flags. | |
492 | */ | |
493 | #define P9_ATTR_MODE (1 << 0) | |
494 | #define P9_ATTR_UID (1 << 1) | |
495 | #define P9_ATTR_GID (1 << 2) | |
496 | #define P9_ATTR_SIZE (1 << 3) | |
497 | #define P9_ATTR_ATIME (1 << 4) | |
498 | #define P9_ATTR_MTIME (1 << 5) | |
499 | #define P9_ATTR_CTIME (1 << 6) | |
500 | #define P9_ATTR_ATIME_SET (1 << 7) | |
501 | #define P9_ATTR_MTIME_SET (1 << 8) | |
502 | ||
503 | struct dotl_iattr_map { | |
504 | int iattr_valid; | |
505 | int p9_iattr_valid; | |
506 | }; | |
507 | ||
508 | static int v9fs_mapped_iattr_valid(int iattr_valid) | |
509 | { | |
510 | int i; | |
511 | int p9_iattr_valid = 0; | |
512 | struct dotl_iattr_map dotl_iattr_map[] = { | |
513 | { ATTR_MODE, P9_ATTR_MODE }, | |
514 | { ATTR_UID, P9_ATTR_UID }, | |
515 | { ATTR_GID, P9_ATTR_GID }, | |
516 | { ATTR_SIZE, P9_ATTR_SIZE }, | |
517 | { ATTR_ATIME, P9_ATTR_ATIME }, | |
518 | { ATTR_MTIME, P9_ATTR_MTIME }, | |
519 | { ATTR_CTIME, P9_ATTR_CTIME }, | |
520 | { ATTR_ATIME_SET, P9_ATTR_ATIME_SET }, | |
521 | { ATTR_MTIME_SET, P9_ATTR_MTIME_SET }, | |
522 | }; | |
523 | for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) { | |
524 | if (iattr_valid & dotl_iattr_map[i].iattr_valid) | |
525 | p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid; | |
526 | } | |
527 | return p9_iattr_valid; | |
528 | } | |
529 | ||
53c06f4e AK |
530 | /** |
531 | * v9fs_vfs_setattr_dotl - set file metadata | |
c1632a0f | 532 | * @idmap: idmap of the mount |
53c06f4e AK |
533 | * @dentry: file whose metadata to set |
534 | * @iattr: metadata assignment structure | |
535 | * | |
536 | */ | |
537 | ||
c1632a0f | 538 | int v9fs_vfs_setattr_dotl(struct mnt_idmap *idmap, |
549c7297 | 539 | struct dentry *dentry, struct iattr *iattr) |
53c06f4e | 540 | { |
6636b6dc | 541 | int retval, use_dentry = 0; |
66246641 | 542 | struct p9_fid *fid = NULL; |
3cb6ee99 CB |
543 | struct p9_iattr_dotl p9attr = { |
544 | .uid = INVALID_UID, | |
545 | .gid = INVALID_GID, | |
546 | }; | |
2b0143b5 | 547 | struct inode *inode = d_inode(dentry); |
53c06f4e | 548 | |
5d385153 | 549 | p9_debug(P9_DEBUG_VFS, "\n"); |
53c06f4e | 550 | |
c1632a0f | 551 | retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); |
53c06f4e AK |
552 | if (retval) |
553 | return retval; | |
554 | ||
f766619d | 555 | p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid); |
3cb6ee99 CB |
556 | if (iattr->ia_valid & ATTR_MODE) |
557 | p9attr.mode = iattr->ia_mode; | |
558 | if (iattr->ia_valid & ATTR_UID) | |
559 | p9attr.uid = iattr->ia_uid; | |
560 | if (iattr->ia_valid & ATTR_GID) | |
561 | p9attr.gid = iattr->ia_gid; | |
562 | if (iattr->ia_valid & ATTR_SIZE) | |
563 | p9attr.size = iattr->ia_size; | |
564 | if (iattr->ia_valid & ATTR_ATIME_SET) { | |
565 | p9attr.atime_sec = iattr->ia_atime.tv_sec; | |
566 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; | |
567 | } | |
568 | if (iattr->ia_valid & ATTR_MTIME_SET) { | |
569 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; | |
570 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; | |
571 | } | |
53c06f4e | 572 | |
66246641 JW |
573 | if (iattr->ia_valid & ATTR_FILE) { |
574 | fid = iattr->ia_file->private_data; | |
575 | WARN_ON(!fid); | |
576 | } | |
6636b6dc | 577 | if (!fid) { |
66246641 | 578 | fid = v9fs_fid_lookup(dentry); |
6636b6dc JW |
579 | use_dentry = 1; |
580 | } | |
53c06f4e AK |
581 | if (IS_ERR(fid)) |
582 | return PTR_ERR(fid); | |
583 | ||
3dc5436a | 584 | /* Write all dirty data */ |
be308f07 AV |
585 | if (S_ISREG(inode->i_mode)) |
586 | filemap_write_and_wait(inode->i_mapping); | |
3dc5436a | 587 | |
f10fc50f | 588 | retval = p9_client_setattr(fid, &p9attr); |
6636b6dc JW |
589 | if (retval < 0) { |
590 | if (use_dentry) | |
b48dbb99 | 591 | p9_fid_put(fid); |
f10fc50f | 592 | return retval; |
6636b6dc | 593 | } |
53c06f4e | 594 | |
059c138b | 595 | if ((iattr->ia_valid & ATTR_SIZE) && |
be308f07 AV |
596 | iattr->ia_size != i_size_read(inode)) |
597 | truncate_setsize(inode, iattr->ia_size); | |
059c138b | 598 | |
be308f07 | 599 | v9fs_invalidate_inode_attr(inode); |
c1632a0f | 600 | setattr_copy(&nop_mnt_idmap, inode, iattr); |
be308f07 | 601 | mark_inode_dirty(inode); |
53c06f4e AK |
602 | if (iattr->ia_valid & ATTR_MODE) { |
603 | /* We also want to update ACL when we update mode bits */ | |
be308f07 | 604 | retval = v9fs_acl_chmod(inode, fid); |
6636b6dc JW |
605 | if (retval < 0) { |
606 | if (use_dentry) | |
b48dbb99 | 607 | p9_fid_put(fid); |
53c06f4e | 608 | return retval; |
6636b6dc | 609 | } |
53c06f4e | 610 | } |
6636b6dc | 611 | if (use_dentry) |
b48dbb99 | 612 | p9_fid_put(fid); |
6636b6dc | 613 | |
53c06f4e AK |
614 | return 0; |
615 | } | |
616 | ||
617 | /** | |
618 | * v9fs_stat2inode_dotl - populate an inode structure with stat info | |
619 | * @stat: stat structure | |
620 | * @inode: inode to populate | |
5e3cc1ee | 621 | * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
53c06f4e AK |
622 | * |
623 | */ | |
624 | ||
625 | void | |
5e3cc1ee HT |
626 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode, |
627 | unsigned int flags) | |
53c06f4e | 628 | { |
3eda0de6 | 629 | umode_t mode; |
b3cbea03 | 630 | struct v9fs_inode *v9inode = V9FS_I(inode); |
53c06f4e AK |
631 | |
632 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { | |
633 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
634 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
635 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
636 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
637 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
638 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
639 | inode->i_uid = stat->st_uid; | |
640 | inode->i_gid = stat->st_gid; | |
bfe86848 | 641 | set_nlink(inode, stat->st_nlink); |
53c06f4e | 642 | |
45089142 AK |
643 | mode = stat->st_mode & S_IALLUGO; |
644 | mode |= inode->i_mode & ~S_IALLUGO; | |
645 | inode->i_mode = mode; | |
53c06f4e | 646 | |
5e3cc1ee HT |
647 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
648 | v9fs_i_size_write(inode, stat->st_size); | |
53c06f4e AK |
649 | inode->i_blocks = stat->st_blocks; |
650 | } else { | |
651 | if (stat->st_result_mask & P9_STATS_ATIME) { | |
652 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
653 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
654 | } | |
655 | if (stat->st_result_mask & P9_STATS_MTIME) { | |
656 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
657 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
658 | } | |
659 | if (stat->st_result_mask & P9_STATS_CTIME) { | |
660 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
661 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
662 | } | |
663 | if (stat->st_result_mask & P9_STATS_UID) | |
664 | inode->i_uid = stat->st_uid; | |
665 | if (stat->st_result_mask & P9_STATS_GID) | |
666 | inode->i_gid = stat->st_gid; | |
667 | if (stat->st_result_mask & P9_STATS_NLINK) | |
bfe86848 | 668 | set_nlink(inode, stat->st_nlink); |
53c06f4e | 669 | if (stat->st_result_mask & P9_STATS_MODE) { |
b577d0cd AV |
670 | mode = stat->st_mode & S_IALLUGO; |
671 | mode |= inode->i_mode & ~S_IALLUGO; | |
672 | inode->i_mode = mode; | |
53c06f4e | 673 | } |
5e3cc1ee HT |
674 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) && |
675 | stat->st_result_mask & P9_STATS_SIZE) | |
676 | v9fs_i_size_write(inode, stat->st_size); | |
53c06f4e AK |
677 | if (stat->st_result_mask & P9_STATS_BLOCKS) |
678 | inode->i_blocks = stat->st_blocks; | |
679 | } | |
680 | if (stat->st_result_mask & P9_STATS_GEN) | |
fd2421f5 | 681 | inode->i_generation = stat->st_gen; |
53c06f4e AK |
682 | |
683 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION | |
684 | * because the inode structure does not have fields for them. | |
685 | */ | |
b3cbea03 | 686 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
53c06f4e AK |
687 | } |
688 | ||
689 | static int | |
549c7297 CB |
690 | v9fs_vfs_symlink_dotl(struct user_namespace *mnt_userns, struct inode *dir, |
691 | struct dentry *dentry, const char *symname) | |
53c06f4e | 692 | { |
53c06f4e | 693 | int err; |
d4ef4e35 | 694 | kgid_t gid; |
7880b43b | 695 | const unsigned char *name; |
d28c61f0 AK |
696 | struct p9_qid qid; |
697 | struct inode *inode; | |
698 | struct p9_fid *dfid; | |
699 | struct p9_fid *fid = NULL; | |
700 | struct v9fs_session_info *v9ses; | |
53c06f4e | 701 | |
7880b43b | 702 | name = dentry->d_name.name; |
5d385153 | 703 | p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname); |
53c06f4e AK |
704 | v9ses = v9fs_inode2v9ses(dir); |
705 | ||
77d5a6b7 | 706 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
707 | if (IS_ERR(dfid)) { |
708 | err = PTR_ERR(dfid); | |
5d385153 | 709 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
710 | return err; |
711 | } | |
712 | ||
713 | gid = v9fs_get_fsgid_for_create(dir); | |
714 | ||
715 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ | |
7880b43b | 716 | err = p9_client_symlink(dfid, name, symname, gid, &qid); |
53c06f4e AK |
717 | |
718 | if (err < 0) { | |
5d385153 | 719 | p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); |
53c06f4e AK |
720 | goto error; |
721 | } | |
722 | ||
d28c61f0 | 723 | v9fs_invalidate_inode_attr(dir); |
fb89b45c | 724 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
53c06f4e AK |
725 | /* Now walk from the parent so we can get an unopened fid. */ |
726 | fid = p9_client_walk(dfid, 1, &name, 1); | |
727 | if (IS_ERR(fid)) { | |
728 | err = PTR_ERR(fid); | |
5d385153 JP |
729 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", |
730 | err); | |
53c06f4e AK |
731 | goto error; |
732 | } | |
733 | ||
734 | /* instantiate inode and assign the unopened fid to dentry */ | |
ed80fcfa | 735 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
736 | if (IS_ERR(inode)) { |
737 | err = PTR_ERR(inode); | |
5d385153 JP |
738 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", |
739 | err); | |
53c06f4e AK |
740 | goto error; |
741 | } | |
dafbe689 | 742 | v9fs_fid_add(dentry, &fid); |
5441ae5e | 743 | d_instantiate(dentry, inode); |
2ea03e1d | 744 | err = 0; |
53c06f4e AK |
745 | } else { |
746 | /* Not in cached mode. No need to populate inode with stat */ | |
45089142 | 747 | inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0); |
53c06f4e AK |
748 | if (IS_ERR(inode)) { |
749 | err = PTR_ERR(inode); | |
750 | goto error; | |
751 | } | |
53c06f4e AK |
752 | d_instantiate(dentry, inode); |
753 | } | |
754 | ||
755 | error: | |
dafbe689 | 756 | p9_fid_put(fid); |
b48dbb99 | 757 | p9_fid_put(dfid); |
53c06f4e AK |
758 | return err; |
759 | } | |
760 | ||
761 | /** | |
762 | * v9fs_vfs_link_dotl - create a hardlink for dotl | |
763 | * @old_dentry: dentry for file to link to | |
764 | * @dir: inode destination for new link | |
765 | * @dentry: dentry for link | |
766 | * | |
767 | */ | |
768 | ||
769 | static int | |
770 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, | |
771 | struct dentry *dentry) | |
772 | { | |
773 | int err; | |
d28c61f0 AK |
774 | struct p9_fid *dfid, *oldfid; |
775 | struct v9fs_session_info *v9ses; | |
53c06f4e | 776 | |
4b8e9923 AV |
777 | p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n", |
778 | dir->i_ino, old_dentry, dentry); | |
53c06f4e AK |
779 | |
780 | v9ses = v9fs_inode2v9ses(dir); | |
77d5a6b7 | 781 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
782 | if (IS_ERR(dfid)) |
783 | return PTR_ERR(dfid); | |
784 | ||
785 | oldfid = v9fs_fid_lookup(old_dentry); | |
6636b6dc | 786 | if (IS_ERR(oldfid)) { |
b48dbb99 | 787 | p9_fid_put(dfid); |
53c06f4e | 788 | return PTR_ERR(oldfid); |
6636b6dc | 789 | } |
53c06f4e | 790 | |
7880b43b | 791 | err = p9_client_link(dfid, oldfid, dentry->d_name.name); |
53c06f4e | 792 | |
b48dbb99 DM |
793 | p9_fid_put(dfid); |
794 | p9_fid_put(oldfid); | |
53c06f4e | 795 | if (err < 0) { |
5d385153 | 796 | p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); |
53c06f4e AK |
797 | return err; |
798 | } | |
799 | ||
d28c61f0 | 800 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
801 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
802 | /* Get the latest stat info from server. */ | |
803 | struct p9_fid *fid; | |
6e195b0f | 804 | |
53c06f4e AK |
805 | fid = v9fs_fid_lookup(old_dentry); |
806 | if (IS_ERR(fid)) | |
807 | return PTR_ERR(fid); | |
808 | ||
2b0143b5 | 809 | v9fs_refresh_inode_dotl(fid, d_inode(old_dentry)); |
b48dbb99 | 810 | p9_fid_put(fid); |
53c06f4e | 811 | } |
2b0143b5 DH |
812 | ihold(d_inode(old_dentry)); |
813 | d_instantiate(dentry, d_inode(old_dentry)); | |
53c06f4e AK |
814 | |
815 | return err; | |
816 | } | |
817 | ||
818 | /** | |
819 | * v9fs_vfs_mknod_dotl - create a special file | |
bc868036 | 820 | * @mnt_userns: The user namespace of the mount |
53c06f4e AK |
821 | * @dir: inode destination for new link |
822 | * @dentry: dentry for file | |
fd2916bd | 823 | * @omode: mode for creation |
53c06f4e AK |
824 | * @rdev: device associated with special file |
825 | * | |
826 | */ | |
827 | static int | |
549c7297 CB |
828 | v9fs_vfs_mknod_dotl(struct user_namespace *mnt_userns, struct inode *dir, |
829 | struct dentry *dentry, umode_t omode, dev_t rdev) | |
53c06f4e AK |
830 | { |
831 | int err; | |
d4ef4e35 | 832 | kgid_t gid; |
7880b43b | 833 | const unsigned char *name; |
d3fb6120 | 834 | umode_t mode; |
53c06f4e AK |
835 | struct v9fs_session_info *v9ses; |
836 | struct p9_fid *fid = NULL, *dfid = NULL; | |
837 | struct inode *inode; | |
53c06f4e | 838 | struct p9_qid qid; |
53c06f4e AK |
839 | struct posix_acl *dacl = NULL, *pacl = NULL; |
840 | ||
6e195b0f | 841 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", |
a455589f | 842 | dir->i_ino, dentry, omode, |
5d385153 | 843 | MAJOR(rdev), MINOR(rdev)); |
53c06f4e | 844 | |
53c06f4e | 845 | v9ses = v9fs_inode2v9ses(dir); |
77d5a6b7 | 846 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
847 | if (IS_ERR(dfid)) { |
848 | err = PTR_ERR(dfid); | |
5d385153 | 849 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
850 | goto error; |
851 | } | |
852 | ||
853 | gid = v9fs_get_fsgid_for_create(dir); | |
854 | mode = omode; | |
855 | /* Update mode based on ACL value */ | |
856 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
857 | if (err) { | |
5d385153 JP |
858 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n", |
859 | err); | |
53c06f4e AK |
860 | goto error; |
861 | } | |
7880b43b | 862 | name = dentry->d_name.name; |
53c06f4e AK |
863 | |
864 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); | |
865 | if (err < 0) | |
866 | goto error; | |
867 | ||
d28c61f0 | 868 | v9fs_invalidate_inode_attr(dir); |
3592ac44 AV |
869 | fid = p9_client_walk(dfid, 1, &name, 1); |
870 | if (IS_ERR(fid)) { | |
871 | err = PTR_ERR(fid); | |
872 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
873 | err); | |
3592ac44 AV |
874 | goto error; |
875 | } | |
876 | ||
53c06f4e AK |
877 | /* instantiate inode and assign the unopened fid to the dentry */ |
878 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
ed80fcfa | 879 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
880 | if (IS_ERR(inode)) { |
881 | err = PTR_ERR(inode); | |
5d385153 JP |
882 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", |
883 | err); | |
53c06f4e AK |
884 | goto error; |
885 | } | |
3592ac44 | 886 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
dafbe689 | 887 | v9fs_fid_add(dentry, &fid); |
5441ae5e | 888 | d_instantiate(dentry, inode); |
2ea03e1d | 889 | err = 0; |
53c06f4e AK |
890 | } else { |
891 | /* | |
892 | * Not in cached mode. No need to populate inode with stat. | |
893 | * socket syscall returns a fd, so we need instantiate | |
894 | */ | |
45089142 | 895 | inode = v9fs_get_inode(dir->i_sb, mode, rdev); |
53c06f4e AK |
896 | if (IS_ERR(inode)) { |
897 | err = PTR_ERR(inode); | |
898 | goto error; | |
899 | } | |
3592ac44 | 900 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
53c06f4e AK |
901 | d_instantiate(dentry, inode); |
902 | } | |
53c06f4e | 903 | error: |
dafbe689 | 904 | p9_fid_put(fid); |
5fa6300a | 905 | v9fs_put_acl(dacl, pacl); |
b48dbb99 | 906 | p9_fid_put(dfid); |
6636b6dc | 907 | |
53c06f4e AK |
908 | return err; |
909 | } | |
910 | ||
53c06f4e | 911 | /** |
6b255391 | 912 | * v9fs_vfs_get_link_dotl - follow a symlink path |
53c06f4e | 913 | * @dentry: dentry for symlink |
6b255391 | 914 | * @inode: inode for symlink |
fceef393 | 915 | * @done: destructor for return value |
53c06f4e AK |
916 | */ |
917 | ||
680baacb | 918 | static const char * |
6b255391 | 919 | v9fs_vfs_get_link_dotl(struct dentry *dentry, |
fceef393 AV |
920 | struct inode *inode, |
921 | struct delayed_call *done) | |
53c06f4e | 922 | { |
6b255391 | 923 | struct p9_fid *fid; |
31b6ceac | 924 | char *target; |
90e4fc88 | 925 | int retval; |
53c06f4e | 926 | |
6b255391 AV |
927 | if (!dentry) |
928 | return ERR_PTR(-ECHILD); | |
929 | ||
4b8e9923 | 930 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
53c06f4e | 931 | |
6b255391 | 932 | fid = v9fs_fid_lookup(dentry); |
90e4fc88 AV |
933 | if (IS_ERR(fid)) |
934 | return ERR_CAST(fid); | |
31b6ceac | 935 | retval = p9_client_readlink(fid, &target); |
b48dbb99 | 936 | p9_fid_put(fid); |
90e4fc88 AV |
937 | if (retval) |
938 | return ERR_PTR(retval); | |
fceef393 AV |
939 | set_delayed_call(done, kfree_link, target); |
940 | return target; | |
53c06f4e AK |
941 | } |
942 | ||
b3cbea03 AK |
943 | int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode) |
944 | { | |
b3cbea03 AK |
945 | struct p9_stat_dotl *st; |
946 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 947 | unsigned int flags; |
b3cbea03 AK |
948 | |
949 | v9ses = v9fs_inode2v9ses(inode); | |
950 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
951 | if (IS_ERR(st)) | |
952 | return PTR_ERR(st); | |
45089142 AK |
953 | /* |
954 | * Don't update inode if the file type is different | |
955 | */ | |
6e3e2c43 | 956 | if (inode_wrong_type(inode, st->st_mode)) |
45089142 | 957 | goto out; |
b3cbea03 | 958 | |
b3cbea03 AK |
959 | /* |
960 | * We don't want to refresh inode->i_size, | |
961 | * because we may have cached data | |
962 | */ | |
5e3cc1ee HT |
963 | flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ? |
964 | V9FS_STAT2INODE_KEEP_ISIZE : 0; | |
965 | v9fs_stat2inode_dotl(st, inode, flags); | |
45089142 | 966 | out: |
b3cbea03 AK |
967 | kfree(st); |
968 | return 0; | |
969 | } | |
970 | ||
53c06f4e AK |
971 | const struct inode_operations v9fs_dir_inode_operations_dotl = { |
972 | .create = v9fs_vfs_create_dotl, | |
e43ae79c | 973 | .atomic_open = v9fs_vfs_atomic_open_dotl, |
53c06f4e AK |
974 | .lookup = v9fs_vfs_lookup, |
975 | .link = v9fs_vfs_link_dotl, | |
976 | .symlink = v9fs_vfs_symlink_dotl, | |
977 | .unlink = v9fs_vfs_unlink, | |
978 | .mkdir = v9fs_vfs_mkdir_dotl, | |
979 | .rmdir = v9fs_vfs_rmdir, | |
980 | .mknod = v9fs_vfs_mknod_dotl, | |
981 | .rename = v9fs_vfs_rename, | |
982 | .getattr = v9fs_vfs_getattr_dotl, | |
983 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e | 984 | .listxattr = v9fs_listxattr, |
6cd4d4e8 CB |
985 | .get_inode_acl = v9fs_iop_get_inode_acl, |
986 | .get_acl = v9fs_iop_get_acl, | |
079da629 | 987 | .set_acl = v9fs_iop_set_acl, |
53c06f4e AK |
988 | }; |
989 | ||
990 | const struct inode_operations v9fs_file_inode_operations_dotl = { | |
991 | .getattr = v9fs_vfs_getattr_dotl, | |
992 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e | 993 | .listxattr = v9fs_listxattr, |
6cd4d4e8 CB |
994 | .get_inode_acl = v9fs_iop_get_inode_acl, |
995 | .get_acl = v9fs_iop_get_acl, | |
079da629 | 996 | .set_acl = v9fs_iop_set_acl, |
53c06f4e AK |
997 | }; |
998 | ||
999 | const struct inode_operations v9fs_symlink_inode_operations_dotl = { | |
6b255391 | 1000 | .get_link = v9fs_vfs_get_link_dotl, |
53c06f4e AK |
1001 | .getattr = v9fs_vfs_getattr_dotl, |
1002 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e AK |
1003 | .listxattr = v9fs_listxattr, |
1004 | }; |