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> | |
53c06f4e | 16 | #include <linux/namei.h> |
53c06f4e AK |
17 | #include <linux/sched.h> |
18 | #include <linux/slab.h> | |
19 | #include <linux/xattr.h> | |
20 | #include <linux/posix_acl.h> | |
21 | #include <net/9p/9p.h> | |
22 | #include <net/9p/client.h> | |
23 | ||
24 | #include "v9fs.h" | |
25 | #include "v9fs_vfs.h" | |
26 | #include "fid.h" | |
27 | #include "cache.h" | |
28 | #include "xattr.h" | |
29 | #include "acl.h" | |
30 | ||
31 | static int | |
5ebb29be | 32 | v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 33 | struct dentry *dentry, umode_t omode, dev_t rdev); |
53c06f4e AK |
34 | |
35 | /** | |
bc868036 DH |
36 | * v9fs_get_fsgid_for_create - Helper function to get the gid for a new object |
37 | * @dir_inode: The directory inode | |
38 | * | |
39 | * Helper function to get the gid for creating a | |
53c06f4e AK |
40 | * new file system object. This checks the S_ISGID to determine the owning |
41 | * group of the new file system object. | |
42 | */ | |
43 | ||
d4ef4e35 | 44 | static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) |
53c06f4e AK |
45 | { |
46 | BUG_ON(dir_inode == NULL); | |
47 | ||
48 | if (dir_inode->i_mode & S_ISGID) { | |
49 | /* set_gid bit is set.*/ | |
50 | return dir_inode->i_gid; | |
51 | } | |
52 | return current_fsgid(); | |
53 | } | |
54 | ||
724a0845 | 55 | struct inode *v9fs_fid_iget_dotl(struct super_block *sb, struct p9_fid *fid) |
5ffc0cb3 AK |
56 | { |
57 | int retval; | |
5ffc0cb3 | 58 | struct inode *inode; |
724a0845 | 59 | struct p9_stat_dotl *st; |
5ffc0cb3 | 60 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
ed80fcfa | 61 | |
724a0845 EVH |
62 | inode = iget_locked(sb, QID2INO(&fid->qid)); |
63 | if (unlikely(!inode)) | |
5ffc0cb3 AK |
64 | return ERR_PTR(-ENOMEM); |
65 | if (!(inode->i_state & I_NEW)) | |
66 | return inode; | |
724a0845 | 67 | |
5ffc0cb3 AK |
68 | /* |
69 | * initialize the inode with the stat info | |
70 | * FIXME!! we may need support for stale inodes | |
71 | * later. | |
72 | */ | |
724a0845 EVH |
73 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN); |
74 | if (IS_ERR(st)) { | |
75 | retval = PTR_ERR(st); | |
76 | goto error; | |
77 | } | |
78 | ||
79 | retval = v9fs_init_inode(v9ses, inode, &fid->qid, | |
45089142 | 80 | st->st_mode, new_decode_dev(st->st_rdev)); |
11763a85 | 81 | v9fs_stat2inode_dotl(st, inode, 0); |
724a0845 | 82 | kfree(st); |
5ffc0cb3 AK |
83 | if (retval) |
84 | goto error; | |
85 | ||
9546ac78 | 86 | v9fs_set_netfs_context(inode); |
5ffc0cb3 | 87 | v9fs_cache_inode_get_cookie(inode); |
5ffc0cb3 AK |
88 | retval = v9fs_get_acl(inode, fid); |
89 | if (retval) | |
90 | goto error; | |
91 | ||
92 | unlock_new_inode(inode); | |
724a0845 | 93 | |
5ffc0cb3 AK |
94 | return inode; |
95 | error: | |
0a73d0a2 | 96 | iget_failed(inode); |
5ffc0cb3 AK |
97 | return ERR_PTR(retval); |
98 | ||
99 | } | |
100 | ||
f88657ce AK |
101 | struct dotl_openflag_map { |
102 | int open_flag; | |
103 | int dotl_flag; | |
104 | }; | |
105 | ||
106 | static int v9fs_mapped_dotl_flags(int flags) | |
107 | { | |
108 | int i; | |
109 | int rflags = 0; | |
110 | struct dotl_openflag_map dotl_oflag_map[] = { | |
111 | { O_CREAT, P9_DOTL_CREATE }, | |
112 | { O_EXCL, P9_DOTL_EXCL }, | |
113 | { O_NOCTTY, P9_DOTL_NOCTTY }, | |
f88657ce AK |
114 | { O_APPEND, P9_DOTL_APPEND }, |
115 | { O_NONBLOCK, P9_DOTL_NONBLOCK }, | |
116 | { O_DSYNC, P9_DOTL_DSYNC }, | |
117 | { FASYNC, P9_DOTL_FASYNC }, | |
118 | { O_DIRECT, P9_DOTL_DIRECT }, | |
119 | { O_LARGEFILE, P9_DOTL_LARGEFILE }, | |
120 | { O_DIRECTORY, P9_DOTL_DIRECTORY }, | |
121 | { O_NOFOLLOW, P9_DOTL_NOFOLLOW }, | |
122 | { O_NOATIME, P9_DOTL_NOATIME }, | |
123 | { O_CLOEXEC, P9_DOTL_CLOEXEC }, | |
124 | { O_SYNC, P9_DOTL_SYNC}, | |
125 | }; | |
126 | for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { | |
127 | if (flags & dotl_oflag_map[i].open_flag) | |
128 | rflags |= dotl_oflag_map[i].dotl_flag; | |
129 | } | |
130 | return rflags; | |
131 | } | |
132 | ||
133 | /** | |
134 | * v9fs_open_to_dotl_flags- convert Linux specific open flags to | |
135 | * plan 9 open flag. | |
136 | * @flags: flags to convert | |
137 | */ | |
138 | int v9fs_open_to_dotl_flags(int flags) | |
139 | { | |
140 | int rflags = 0; | |
141 | ||
142 | /* | |
143 | * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY | |
144 | * and P9_DOTL_NOACCESS | |
145 | */ | |
146 | rflags |= flags & O_ACCMODE; | |
147 | rflags |= v9fs_mapped_dotl_flags(flags); | |
148 | ||
149 | return rflags; | |
150 | } | |
151 | ||
53c06f4e AK |
152 | /** |
153 | * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. | |
6c960e68 | 154 | * @idmap: The user namespace of the mount |
53c06f4e AK |
155 | * @dir: directory inode that is being created |
156 | * @dentry: dentry that is being deleted | |
fd2916bd | 157 | * @omode: create permissions |
bc868036 | 158 | * @excl: True if the file must not yet exist |
53c06f4e AK |
159 | * |
160 | */ | |
53c06f4e | 161 | static int |
6c960e68 | 162 | v9fs_vfs_create_dotl(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 163 | struct dentry *dentry, umode_t omode, bool excl) |
e43ae79c | 164 | { |
5ebb29be | 165 | return v9fs_vfs_mknod_dotl(idmap, dir, dentry, omode, 0); |
e43ae79c MS |
166 | } |
167 | ||
d9585277 | 168 | static int |
e43ae79c | 169 | v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry, |
6e195b0f | 170 | struct file *file, unsigned int flags, umode_t omode) |
53c06f4e AK |
171 | { |
172 | int err = 0; | |
d4ef4e35 | 173 | kgid_t gid; |
d3fb6120 | 174 | umode_t mode; |
1543b4c5 | 175 | int p9_omode = v9fs_open_to_dotl_flags(flags); |
7880b43b | 176 | const unsigned char *name = NULL; |
53c06f4e AK |
177 | struct p9_qid qid; |
178 | struct inode *inode; | |
6b39f6d2 | 179 | struct p9_fid *fid = NULL; |
1543b4c5 | 180 | struct p9_fid *dfid = NULL, *ofid = NULL; |
6b39f6d2 | 181 | struct v9fs_session_info *v9ses; |
53c06f4e | 182 | struct posix_acl *pacl = NULL, *dacl = NULL; |
e43ae79c | 183 | struct dentry *res = NULL; |
53c06f4e | 184 | |
00699ad8 | 185 | if (d_in_lookup(dentry)) { |
00cd8dd3 | 186 | res = v9fs_vfs_lookup(dir, dentry, 0); |
e43ae79c | 187 | if (IS_ERR(res)) |
d9585277 | 188 | return PTR_ERR(res); |
e43ae79c MS |
189 | |
190 | if (res) | |
191 | dentry = res; | |
192 | } | |
193 | ||
194 | /* Only creates */ | |
2b0143b5 | 195 | if (!(flags & O_CREAT) || d_really_is_positive(dentry)) |
b6f4bee0 | 196 | return finish_no_open(file, res); |
53c06f4e | 197 | |
e43ae79c MS |
198 | v9ses = v9fs_inode2v9ses(dir); |
199 | ||
7880b43b | 200 | name = dentry->d_name.name; |
6e195b0f | 201 | p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n", |
5d385153 | 202 | name, flags, omode); |
53c06f4e | 203 | |
77d5a6b7 | 204 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
205 | if (IS_ERR(dfid)) { |
206 | err = PTR_ERR(dfid); | |
5d385153 | 207 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
d9585277 | 208 | goto out; |
53c06f4e AK |
209 | } |
210 | ||
211 | /* clone a fid to use for creation */ | |
7d50a29f | 212 | ofid = clone_fid(dfid); |
53c06f4e AK |
213 | if (IS_ERR(ofid)) { |
214 | err = PTR_ERR(ofid); | |
5d385153 | 215 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
d9585277 | 216 | goto out; |
53c06f4e AK |
217 | } |
218 | ||
219 | gid = v9fs_get_fsgid_for_create(dir); | |
220 | ||
221 | mode = omode; | |
222 | /* Update mode based on ACL value */ | |
223 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
224 | if (err) { | |
1543b4c5 | 225 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in create %d\n", |
5d385153 | 226 | err); |
dafbe689 | 227 | goto out; |
53c06f4e | 228 | } |
1543b4c5 | 229 | |
4eb31178 | 230 | if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) { |
21e26d5e | 231 | p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR; |
1543b4c5 EVH |
232 | p9_debug(P9_DEBUG_CACHE, |
233 | "write-only file with writeback enabled, creating w/ O_RDWR\n"); | |
234 | } | |
235 | err = p9_client_create_dotl(ofid, name, p9_omode, mode, gid, &qid); | |
53c06f4e | 236 | if (err < 0) { |
1543b4c5 | 237 | p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in create %d\n", |
5d385153 | 238 | err); |
dafbe689 | 239 | goto out; |
53c06f4e | 240 | } |
d28c61f0 | 241 | v9fs_invalidate_inode_attr(dir); |
53c06f4e | 242 | |
af7542fc AK |
243 | /* instantiate inode and assign the unopened fid to the dentry */ |
244 | fid = p9_client_walk(dfid, 1, &name, 1); | |
245 | if (IS_ERR(fid)) { | |
246 | err = PTR_ERR(fid); | |
5d385153 | 247 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
dafbe689 | 248 | goto out; |
53c06f4e | 249 | } |
724a0845 | 250 | inode = v9fs_fid_iget_dotl(dir->i_sb, fid); |
af7542fc AK |
251 | if (IS_ERR(inode)) { |
252 | err = PTR_ERR(inode); | |
5d385153 | 253 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
dafbe689 | 254 | goto out; |
af7542fc | 255 | } |
3592ac44 AV |
256 | /* Now set the ACL based on the default value */ |
257 | v9fs_set_create_acl(inode, fid, dacl, pacl); | |
258 | ||
dafbe689 | 259 | v9fs_fid_add(dentry, &fid); |
5441ae5e | 260 | d_instantiate(dentry, inode); |
af7542fc | 261 | |
af7542fc | 262 | /* Since we are opening a file, assign the open fid to the file */ |
be12af3e | 263 | err = finish_open(file, dentry, generic_file_open); |
30d90494 | 264 | if (err) |
dafbe689 | 265 | goto out; |
30d90494 | 266 | file->private_data = ofid; |
344504e9 | 267 | #ifdef CONFIG_9P_FSCACHE |
4eb31178 | 268 | if (v9ses->cache & CACHE_FSCACHE) { |
1543b4c5 | 269 | struct v9fs_inode *v9inode = V9FS_I(inode); |
24e42e32 DH |
270 | fscache_use_cookie(v9fs_inode_cookie(v9inode), |
271 | file->f_mode & FMODE_WRITE); | |
1543b4c5 | 272 | } |
344504e9 | 273 | #endif |
1543b4c5 | 274 | v9fs_fid_add_modes(ofid, v9ses->flags, v9ses->cache, flags); |
dafbe689 | 275 | v9fs_open_fid_add(inode, &ofid); |
73a09dd9 | 276 | file->f_mode |= FMODE_CREATED; |
e43ae79c | 277 | out: |
dafbe689 DM |
278 | p9_fid_put(dfid); |
279 | p9_fid_put(ofid); | |
280 | p9_fid_put(fid); | |
5fa6300a | 281 | v9fs_put_acl(dacl, pacl); |
e43ae79c | 282 | dput(res); |
d9585277 | 283 | return err; |
53c06f4e AK |
284 | } |
285 | ||
286 | /** | |
287 | * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory | |
c54bd91e | 288 | * @idmap: The idmap of the mount |
53c06f4e AK |
289 | * @dir: inode that is being unlinked |
290 | * @dentry: dentry that is being unlinked | |
fd2916bd | 291 | * @omode: mode for new directory |
53c06f4e AK |
292 | * |
293 | */ | |
294 | ||
c54bd91e | 295 | static int v9fs_vfs_mkdir_dotl(struct mnt_idmap *idmap, |
549c7297 CB |
296 | struct inode *dir, struct dentry *dentry, |
297 | umode_t omode) | |
53c06f4e AK |
298 | { |
299 | int err; | |
53c06f4e | 300 | struct p9_fid *fid = NULL, *dfid = NULL; |
d4ef4e35 | 301 | kgid_t gid; |
7880b43b | 302 | const unsigned char *name; |
d3fb6120 | 303 | umode_t mode; |
53c06f4e AK |
304 | struct inode *inode; |
305 | struct p9_qid qid; | |
53c06f4e AK |
306 | struct posix_acl *dacl = NULL, *pacl = NULL; |
307 | ||
4b8e9923 | 308 | p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry); |
53c06f4e AK |
309 | |
310 | omode |= S_IFDIR; | |
311 | if (dir->i_mode & S_ISGID) | |
312 | omode |= S_ISGID; | |
313 | ||
77d5a6b7 | 314 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
315 | if (IS_ERR(dfid)) { |
316 | err = PTR_ERR(dfid); | |
5d385153 | 317 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
318 | goto error; |
319 | } | |
320 | ||
321 | gid = v9fs_get_fsgid_for_create(dir); | |
322 | mode = omode; | |
323 | /* Update mode based on ACL value */ | |
324 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
325 | if (err) { | |
5d385153 JP |
326 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n", |
327 | err); | |
53c06f4e AK |
328 | goto error; |
329 | } | |
7880b43b | 330 | name = dentry->d_name.name; |
53c06f4e AK |
331 | err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); |
332 | if (err < 0) | |
333 | goto error; | |
3592ac44 AV |
334 | fid = p9_client_walk(dfid, 1, &name, 1); |
335 | if (IS_ERR(fid)) { | |
336 | err = PTR_ERR(fid); | |
337 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
338 | err); | |
3592ac44 AV |
339 | goto error; |
340 | } | |
341 | ||
53c06f4e | 342 | /* instantiate inode and assign the unopened fid to the dentry */ |
724a0845 | 343 | inode = v9fs_fid_iget_dotl(dir->i_sb, fid); |
44c53ac0 EVH |
344 | if (IS_ERR(inode)) { |
345 | err = PTR_ERR(inode); | |
346 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", | |
347 | err); | |
348 | goto error; | |
53c06f4e | 349 | } |
44c53ac0 EVH |
350 | v9fs_fid_add(dentry, &fid); |
351 | v9fs_set_create_acl(inode, fid, dacl, pacl); | |
352 | d_instantiate(dentry, inode); | |
353 | err = 0; | |
b271ec47 | 354 | inc_nlink(dir); |
d28c61f0 | 355 | v9fs_invalidate_inode_attr(dir); |
53c06f4e | 356 | error: |
dafbe689 | 357 | p9_fid_put(fid); |
5fa6300a | 358 | v9fs_put_acl(dacl, pacl); |
b48dbb99 | 359 | p9_fid_put(dfid); |
53c06f4e AK |
360 | return err; |
361 | } | |
362 | ||
363 | static int | |
b74d24f7 | 364 | v9fs_vfs_getattr_dotl(struct mnt_idmap *idmap, |
549c7297 CB |
365 | const struct path *path, struct kstat *stat, |
366 | u32 request_mask, unsigned int flags) | |
53c06f4e | 367 | { |
a528d35e | 368 | struct dentry *dentry = path->dentry; |
53c06f4e AK |
369 | struct v9fs_session_info *v9ses; |
370 | struct p9_fid *fid; | |
d9bc0d11 | 371 | struct inode *inode = d_inode(dentry); |
53c06f4e AK |
372 | struct p9_stat_dotl *st; |
373 | ||
5d385153 | 374 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
42869c8a | 375 | v9ses = v9fs_dentry2v9ses(dentry); |
4eb31178 | 376 | if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { |
0d72b928 | 377 | generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); |
a1211908 | 378 | return 0; |
1543b4c5 | 379 | } else if (v9ses->cache) { |
d9bc0d11 EVH |
380 | if (S_ISREG(inode->i_mode)) { |
381 | int retval = filemap_fdatawrite(inode->i_mapping); | |
382 | ||
383 | if (retval) | |
384 | p9_debug(P9_DEBUG_ERROR, | |
385 | "flushing writeback during getattr returned %d\n", retval); | |
386 | } | |
a1211908 | 387 | } |
53c06f4e AK |
388 | fid = v9fs_fid_lookup(dentry); |
389 | if (IS_ERR(fid)) | |
390 | return PTR_ERR(fid); | |
391 | ||
392 | /* Ask for all the fields in stat structure. Server will return | |
393 | * whatever it supports | |
394 | */ | |
395 | ||
396 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
b48dbb99 | 397 | p9_fid_put(fid); |
53c06f4e AK |
398 | if (IS_ERR(st)) |
399 | return PTR_ERR(st); | |
400 | ||
5e3cc1ee | 401 | v9fs_stat2inode_dotl(st, d_inode(dentry), 0); |
0d72b928 | 402 | generic_fillattr(&nop_mnt_idmap, request_mask, d_inode(dentry), stat); |
53c06f4e AK |
403 | /* Change block size to what the server returned */ |
404 | stat->blksize = st->st_blksize; | |
405 | ||
406 | kfree(st); | |
407 | return 0; | |
408 | } | |
409 | ||
f766619d AK |
410 | /* |
411 | * Attribute flags. | |
412 | */ | |
413 | #define P9_ATTR_MODE (1 << 0) | |
414 | #define P9_ATTR_UID (1 << 1) | |
415 | #define P9_ATTR_GID (1 << 2) | |
416 | #define P9_ATTR_SIZE (1 << 3) | |
417 | #define P9_ATTR_ATIME (1 << 4) | |
418 | #define P9_ATTR_MTIME (1 << 5) | |
419 | #define P9_ATTR_CTIME (1 << 6) | |
420 | #define P9_ATTR_ATIME_SET (1 << 7) | |
421 | #define P9_ATTR_MTIME_SET (1 << 8) | |
422 | ||
423 | struct dotl_iattr_map { | |
424 | int iattr_valid; | |
425 | int p9_iattr_valid; | |
426 | }; | |
427 | ||
428 | static int v9fs_mapped_iattr_valid(int iattr_valid) | |
429 | { | |
430 | int i; | |
431 | int p9_iattr_valid = 0; | |
432 | struct dotl_iattr_map dotl_iattr_map[] = { | |
433 | { ATTR_MODE, P9_ATTR_MODE }, | |
434 | { ATTR_UID, P9_ATTR_UID }, | |
435 | { ATTR_GID, P9_ATTR_GID }, | |
436 | { ATTR_SIZE, P9_ATTR_SIZE }, | |
437 | { ATTR_ATIME, P9_ATTR_ATIME }, | |
438 | { ATTR_MTIME, P9_ATTR_MTIME }, | |
439 | { ATTR_CTIME, P9_ATTR_CTIME }, | |
440 | { ATTR_ATIME_SET, P9_ATTR_ATIME_SET }, | |
441 | { ATTR_MTIME_SET, P9_ATTR_MTIME_SET }, | |
442 | }; | |
443 | for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) { | |
444 | if (iattr_valid & dotl_iattr_map[i].iattr_valid) | |
445 | p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid; | |
446 | } | |
447 | return p9_iattr_valid; | |
448 | } | |
449 | ||
53c06f4e AK |
450 | /** |
451 | * v9fs_vfs_setattr_dotl - set file metadata | |
c1632a0f | 452 | * @idmap: idmap of the mount |
53c06f4e AK |
453 | * @dentry: file whose metadata to set |
454 | * @iattr: metadata assignment structure | |
455 | * | |
456 | */ | |
457 | ||
c1632a0f | 458 | int v9fs_vfs_setattr_dotl(struct mnt_idmap *idmap, |
549c7297 | 459 | struct dentry *dentry, struct iattr *iattr) |
53c06f4e | 460 | { |
6636b6dc | 461 | int retval, use_dentry = 0; |
d9bc0d11 | 462 | struct inode *inode = d_inode(dentry); |
4eb31178 | 463 | struct v9fs_session_info __maybe_unused *v9ses; |
66246641 | 464 | struct p9_fid *fid = NULL; |
3cb6ee99 CB |
465 | struct p9_iattr_dotl p9attr = { |
466 | .uid = INVALID_UID, | |
467 | .gid = INVALID_GID, | |
468 | }; | |
53c06f4e | 469 | |
5d385153 | 470 | p9_debug(P9_DEBUG_VFS, "\n"); |
53c06f4e | 471 | |
c1632a0f | 472 | retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr); |
53c06f4e AK |
473 | if (retval) |
474 | return retval; | |
475 | ||
d9bc0d11 EVH |
476 | v9ses = v9fs_dentry2v9ses(dentry); |
477 | ||
f766619d | 478 | p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid); |
3cb6ee99 CB |
479 | if (iattr->ia_valid & ATTR_MODE) |
480 | p9attr.mode = iattr->ia_mode; | |
481 | if (iattr->ia_valid & ATTR_UID) | |
482 | p9attr.uid = iattr->ia_uid; | |
483 | if (iattr->ia_valid & ATTR_GID) | |
484 | p9attr.gid = iattr->ia_gid; | |
485 | if (iattr->ia_valid & ATTR_SIZE) | |
486 | p9attr.size = iattr->ia_size; | |
487 | if (iattr->ia_valid & ATTR_ATIME_SET) { | |
488 | p9attr.atime_sec = iattr->ia_atime.tv_sec; | |
489 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; | |
490 | } | |
491 | if (iattr->ia_valid & ATTR_MTIME_SET) { | |
492 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; | |
493 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; | |
494 | } | |
53c06f4e | 495 | |
66246641 JW |
496 | if (iattr->ia_valid & ATTR_FILE) { |
497 | fid = iattr->ia_file->private_data; | |
498 | WARN_ON(!fid); | |
499 | } | |
6636b6dc | 500 | if (!fid) { |
66246641 | 501 | fid = v9fs_fid_lookup(dentry); |
6636b6dc JW |
502 | use_dentry = 1; |
503 | } | |
53c06f4e AK |
504 | if (IS_ERR(fid)) |
505 | return PTR_ERR(fid); | |
506 | ||
3dc5436a | 507 | /* Write all dirty data */ |
d9bc0d11 EVH |
508 | if (S_ISREG(inode->i_mode)) { |
509 | retval = filemap_fdatawrite(inode->i_mapping); | |
510 | if (retval < 0) | |
511 | p9_debug(P9_DEBUG_ERROR, | |
512 | "Flushing file prior to setattr failed: %d\n", retval); | |
513 | } | |
3dc5436a | 514 | |
f10fc50f | 515 | retval = p9_client_setattr(fid, &p9attr); |
6636b6dc JW |
516 | if (retval < 0) { |
517 | if (use_dentry) | |
b48dbb99 | 518 | p9_fid_put(fid); |
f10fc50f | 519 | return retval; |
6636b6dc | 520 | } |
53c06f4e | 521 | |
d9bc0d11 EVH |
522 | if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size != |
523 | i_size_read(inode)) { | |
be308f07 | 524 | truncate_setsize(inode, iattr->ia_size); |
80105ed2 | 525 | netfs_resize_file(netfs_inode(inode), iattr->ia_size, true); |
1543b4c5 | 526 | |
4eb31178 EVH |
527 | #ifdef CONFIG_9P_FSCACHE |
528 | if (v9ses->cache & CACHE_FSCACHE) | |
529 | fscache_resize_cookie(v9fs_inode_cookie(V9FS_I(inode)), | |
530 | iattr->ia_size); | |
531 | #endif | |
d9bc0d11 | 532 | } |
059c138b | 533 | |
be308f07 | 534 | v9fs_invalidate_inode_attr(inode); |
c1632a0f | 535 | setattr_copy(&nop_mnt_idmap, inode, iattr); |
be308f07 | 536 | mark_inode_dirty(inode); |
53c06f4e AK |
537 | if (iattr->ia_valid & ATTR_MODE) { |
538 | /* We also want to update ACL when we update mode bits */ | |
be308f07 | 539 | retval = v9fs_acl_chmod(inode, fid); |
6636b6dc JW |
540 | if (retval < 0) { |
541 | if (use_dentry) | |
b48dbb99 | 542 | p9_fid_put(fid); |
53c06f4e | 543 | return retval; |
6636b6dc | 544 | } |
53c06f4e | 545 | } |
6636b6dc | 546 | if (use_dentry) |
b48dbb99 | 547 | p9_fid_put(fid); |
6636b6dc | 548 | |
53c06f4e AK |
549 | return 0; |
550 | } | |
551 | ||
552 | /** | |
553 | * v9fs_stat2inode_dotl - populate an inode structure with stat info | |
554 | * @stat: stat structure | |
555 | * @inode: inode to populate | |
5e3cc1ee | 556 | * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE) |
53c06f4e AK |
557 | * |
558 | */ | |
559 | ||
560 | void | |
5e3cc1ee HT |
561 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode, |
562 | unsigned int flags) | |
53c06f4e | 563 | { |
3eda0de6 | 564 | umode_t mode; |
b3cbea03 | 565 | struct v9fs_inode *v9inode = V9FS_I(inode); |
53c06f4e AK |
566 | |
567 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { | |
d0242a3a JL |
568 | inode_set_atime(inode, stat->st_atime_sec, |
569 | stat->st_atime_nsec); | |
570 | inode_set_mtime(inode, stat->st_mtime_sec, | |
571 | stat->st_mtime_nsec); | |
4f871800 JL |
572 | inode_set_ctime(inode, stat->st_ctime_sec, |
573 | stat->st_ctime_nsec); | |
53c06f4e AK |
574 | inode->i_uid = stat->st_uid; |
575 | inode->i_gid = stat->st_gid; | |
bfe86848 | 576 | set_nlink(inode, stat->st_nlink); |
53c06f4e | 577 | |
45089142 AK |
578 | mode = stat->st_mode & S_IALLUGO; |
579 | mode |= inode->i_mode & ~S_IALLUGO; | |
580 | inode->i_mode = mode; | |
53c06f4e | 581 | |
80105ed2 | 582 | v9inode->netfs.remote_i_size = stat->st_size; |
5e3cc1ee HT |
583 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE)) |
584 | v9fs_i_size_write(inode, stat->st_size); | |
53c06f4e AK |
585 | inode->i_blocks = stat->st_blocks; |
586 | } else { | |
587 | if (stat->st_result_mask & P9_STATS_ATIME) { | |
d0242a3a JL |
588 | inode_set_atime(inode, stat->st_atime_sec, |
589 | stat->st_atime_nsec); | |
53c06f4e AK |
590 | } |
591 | if (stat->st_result_mask & P9_STATS_MTIME) { | |
d0242a3a JL |
592 | inode_set_mtime(inode, stat->st_mtime_sec, |
593 | stat->st_mtime_nsec); | |
53c06f4e AK |
594 | } |
595 | if (stat->st_result_mask & P9_STATS_CTIME) { | |
4f871800 JL |
596 | inode_set_ctime(inode, stat->st_ctime_sec, |
597 | stat->st_ctime_nsec); | |
53c06f4e AK |
598 | } |
599 | if (stat->st_result_mask & P9_STATS_UID) | |
600 | inode->i_uid = stat->st_uid; | |
601 | if (stat->st_result_mask & P9_STATS_GID) | |
602 | inode->i_gid = stat->st_gid; | |
603 | if (stat->st_result_mask & P9_STATS_NLINK) | |
bfe86848 | 604 | set_nlink(inode, stat->st_nlink); |
53c06f4e | 605 | if (stat->st_result_mask & P9_STATS_MODE) { |
b577d0cd AV |
606 | mode = stat->st_mode & S_IALLUGO; |
607 | mode |= inode->i_mode & ~S_IALLUGO; | |
608 | inode->i_mode = mode; | |
53c06f4e | 609 | } |
5e3cc1ee | 610 | if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) && |
80105ed2 DH |
611 | stat->st_result_mask & P9_STATS_SIZE) { |
612 | v9inode->netfs.remote_i_size = stat->st_size; | |
5e3cc1ee | 613 | v9fs_i_size_write(inode, stat->st_size); |
80105ed2 | 614 | } |
53c06f4e AK |
615 | if (stat->st_result_mask & P9_STATS_BLOCKS) |
616 | inode->i_blocks = stat->st_blocks; | |
617 | } | |
618 | if (stat->st_result_mask & P9_STATS_GEN) | |
fd2421f5 | 619 | inode->i_generation = stat->st_gen; |
53c06f4e AK |
620 | |
621 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION | |
622 | * because the inode structure does not have fields for them. | |
623 | */ | |
b3cbea03 | 624 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
53c06f4e AK |
625 | } |
626 | ||
627 | static int | |
7a77db95 | 628 | v9fs_vfs_symlink_dotl(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 629 | struct dentry *dentry, const char *symname) |
53c06f4e | 630 | { |
53c06f4e | 631 | int err; |
d4ef4e35 | 632 | kgid_t gid; |
7880b43b | 633 | const unsigned char *name; |
d28c61f0 | 634 | struct p9_qid qid; |
d28c61f0 AK |
635 | struct p9_fid *dfid; |
636 | struct p9_fid *fid = NULL; | |
53c06f4e | 637 | |
7880b43b | 638 | name = dentry->d_name.name; |
5d385153 | 639 | p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname); |
53c06f4e | 640 | |
77d5a6b7 | 641 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
642 | if (IS_ERR(dfid)) { |
643 | err = PTR_ERR(dfid); | |
5d385153 | 644 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
645 | return err; |
646 | } | |
647 | ||
648 | gid = v9fs_get_fsgid_for_create(dir); | |
649 | ||
650 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ | |
7880b43b | 651 | err = p9_client_symlink(dfid, name, symname, gid, &qid); |
53c06f4e AK |
652 | |
653 | if (err < 0) { | |
5d385153 | 654 | p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); |
53c06f4e AK |
655 | goto error; |
656 | } | |
657 | ||
d28c61f0 | 658 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
659 | |
660 | error: | |
dafbe689 | 661 | p9_fid_put(fid); |
b48dbb99 | 662 | p9_fid_put(dfid); |
53c06f4e AK |
663 | return err; |
664 | } | |
665 | ||
666 | /** | |
667 | * v9fs_vfs_link_dotl - create a hardlink for dotl | |
668 | * @old_dentry: dentry for file to link to | |
669 | * @dir: inode destination for new link | |
670 | * @dentry: dentry for link | |
671 | * | |
672 | */ | |
673 | ||
674 | static int | |
675 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, | |
676 | struct dentry *dentry) | |
677 | { | |
678 | int err; | |
d28c61f0 AK |
679 | struct p9_fid *dfid, *oldfid; |
680 | struct v9fs_session_info *v9ses; | |
53c06f4e | 681 | |
4b8e9923 AV |
682 | p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n", |
683 | dir->i_ino, old_dentry, dentry); | |
53c06f4e AK |
684 | |
685 | v9ses = v9fs_inode2v9ses(dir); | |
77d5a6b7 | 686 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
687 | if (IS_ERR(dfid)) |
688 | return PTR_ERR(dfid); | |
689 | ||
690 | oldfid = v9fs_fid_lookup(old_dentry); | |
6636b6dc | 691 | if (IS_ERR(oldfid)) { |
b48dbb99 | 692 | p9_fid_put(dfid); |
53c06f4e | 693 | return PTR_ERR(oldfid); |
6636b6dc | 694 | } |
53c06f4e | 695 | |
7880b43b | 696 | err = p9_client_link(dfid, oldfid, dentry->d_name.name); |
53c06f4e | 697 | |
b48dbb99 DM |
698 | p9_fid_put(dfid); |
699 | p9_fid_put(oldfid); | |
53c06f4e | 700 | if (err < 0) { |
5d385153 | 701 | p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); |
53c06f4e AK |
702 | return err; |
703 | } | |
704 | ||
d28c61f0 | 705 | v9fs_invalidate_inode_attr(dir); |
4eb31178 | 706 | if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) { |
53c06f4e AK |
707 | /* Get the latest stat info from server. */ |
708 | struct p9_fid *fid; | |
6e195b0f | 709 | |
53c06f4e AK |
710 | fid = v9fs_fid_lookup(old_dentry); |
711 | if (IS_ERR(fid)) | |
712 | return PTR_ERR(fid); | |
713 | ||
2b0143b5 | 714 | v9fs_refresh_inode_dotl(fid, d_inode(old_dentry)); |
b48dbb99 | 715 | p9_fid_put(fid); |
53c06f4e | 716 | } |
2b0143b5 DH |
717 | ihold(d_inode(old_dentry)); |
718 | d_instantiate(dentry, d_inode(old_dentry)); | |
53c06f4e AK |
719 | |
720 | return err; | |
721 | } | |
722 | ||
723 | /** | |
724 | * v9fs_vfs_mknod_dotl - create a special file | |
5ebb29be | 725 | * @idmap: The idmap of the mount |
53c06f4e AK |
726 | * @dir: inode destination for new link |
727 | * @dentry: dentry for file | |
fd2916bd | 728 | * @omode: mode for creation |
53c06f4e AK |
729 | * @rdev: device associated with special file |
730 | * | |
731 | */ | |
732 | static int | |
5ebb29be | 733 | v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 734 | struct dentry *dentry, umode_t omode, dev_t rdev) |
53c06f4e AK |
735 | { |
736 | int err; | |
d4ef4e35 | 737 | kgid_t gid; |
7880b43b | 738 | const unsigned char *name; |
d3fb6120 | 739 | umode_t mode; |
53c06f4e AK |
740 | struct p9_fid *fid = NULL, *dfid = NULL; |
741 | struct inode *inode; | |
53c06f4e | 742 | struct p9_qid qid; |
53c06f4e AK |
743 | struct posix_acl *dacl = NULL, *pacl = NULL; |
744 | ||
6e195b0f | 745 | p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n", |
a455589f | 746 | dir->i_ino, dentry, omode, |
5d385153 | 747 | MAJOR(rdev), MINOR(rdev)); |
53c06f4e | 748 | |
77d5a6b7 | 749 | dfid = v9fs_parent_fid(dentry); |
53c06f4e AK |
750 | if (IS_ERR(dfid)) { |
751 | err = PTR_ERR(dfid); | |
5d385153 | 752 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
53c06f4e AK |
753 | goto error; |
754 | } | |
755 | ||
756 | gid = v9fs_get_fsgid_for_create(dir); | |
757 | mode = omode; | |
758 | /* Update mode based on ACL value */ | |
759 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
760 | if (err) { | |
5d385153 JP |
761 | p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n", |
762 | err); | |
53c06f4e AK |
763 | goto error; |
764 | } | |
7880b43b | 765 | name = dentry->d_name.name; |
53c06f4e AK |
766 | |
767 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); | |
768 | if (err < 0) | |
769 | goto error; | |
770 | ||
d28c61f0 | 771 | v9fs_invalidate_inode_attr(dir); |
3592ac44 AV |
772 | fid = p9_client_walk(dfid, 1, &name, 1); |
773 | if (IS_ERR(fid)) { | |
774 | err = PTR_ERR(fid); | |
775 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
776 | err); | |
3592ac44 AV |
777 | goto error; |
778 | } | |
724a0845 | 779 | inode = v9fs_fid_iget_dotl(dir->i_sb, fid); |
2dc92e59 EVH |
780 | if (IS_ERR(inode)) { |
781 | err = PTR_ERR(inode); | |
782 | p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", | |
783 | err); | |
784 | goto error; | |
53c06f4e | 785 | } |
2dc92e59 EVH |
786 | v9fs_set_create_acl(inode, fid, dacl, pacl); |
787 | v9fs_fid_add(dentry, &fid); | |
788 | d_instantiate(dentry, inode); | |
789 | err = 0; | |
53c06f4e | 790 | error: |
dafbe689 | 791 | p9_fid_put(fid); |
5fa6300a | 792 | v9fs_put_acl(dacl, pacl); |
b48dbb99 | 793 | p9_fid_put(dfid); |
6636b6dc | 794 | |
53c06f4e AK |
795 | return err; |
796 | } | |
797 | ||
53c06f4e | 798 | /** |
6b255391 | 799 | * v9fs_vfs_get_link_dotl - follow a symlink path |
53c06f4e | 800 | * @dentry: dentry for symlink |
6b255391 | 801 | * @inode: inode for symlink |
fceef393 | 802 | * @done: destructor for return value |
53c06f4e AK |
803 | */ |
804 | ||
680baacb | 805 | static const char * |
6b255391 | 806 | v9fs_vfs_get_link_dotl(struct dentry *dentry, |
fceef393 AV |
807 | struct inode *inode, |
808 | struct delayed_call *done) | |
53c06f4e | 809 | { |
6b255391 | 810 | struct p9_fid *fid; |
31b6ceac | 811 | char *target; |
90e4fc88 | 812 | int retval; |
53c06f4e | 813 | |
6b255391 AV |
814 | if (!dentry) |
815 | return ERR_PTR(-ECHILD); | |
816 | ||
4b8e9923 | 817 | p9_debug(P9_DEBUG_VFS, "%pd\n", dentry); |
53c06f4e | 818 | |
6b255391 | 819 | fid = v9fs_fid_lookup(dentry); |
90e4fc88 AV |
820 | if (IS_ERR(fid)) |
821 | return ERR_CAST(fid); | |
31b6ceac | 822 | retval = p9_client_readlink(fid, &target); |
b48dbb99 | 823 | p9_fid_put(fid); |
90e4fc88 AV |
824 | if (retval) |
825 | return ERR_PTR(retval); | |
fceef393 AV |
826 | set_delayed_call(done, kfree_link, target); |
827 | return target; | |
53c06f4e AK |
828 | } |
829 | ||
b3cbea03 AK |
830 | int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode) |
831 | { | |
b3cbea03 AK |
832 | struct p9_stat_dotl *st; |
833 | struct v9fs_session_info *v9ses; | |
5e3cc1ee | 834 | unsigned int flags; |
b3cbea03 AK |
835 | |
836 | v9ses = v9fs_inode2v9ses(inode); | |
837 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
838 | if (IS_ERR(st)) | |
839 | return PTR_ERR(st); | |
45089142 AK |
840 | /* |
841 | * Don't update inode if the file type is different | |
842 | */ | |
6e3e2c43 | 843 | if (inode_wrong_type(inode, st->st_mode)) |
45089142 | 844 | goto out; |
b3cbea03 | 845 | |
b3cbea03 AK |
846 | /* |
847 | * We don't want to refresh inode->i_size, | |
848 | * because we may have cached data | |
849 | */ | |
4eb31178 | 850 | flags = (v9ses->cache & CACHE_LOOSE) ? |
5e3cc1ee HT |
851 | V9FS_STAT2INODE_KEEP_ISIZE : 0; |
852 | v9fs_stat2inode_dotl(st, inode, flags); | |
45089142 | 853 | out: |
b3cbea03 AK |
854 | kfree(st); |
855 | return 0; | |
856 | } | |
857 | ||
53c06f4e AK |
858 | const struct inode_operations v9fs_dir_inode_operations_dotl = { |
859 | .create = v9fs_vfs_create_dotl, | |
e43ae79c | 860 | .atomic_open = v9fs_vfs_atomic_open_dotl, |
53c06f4e AK |
861 | .lookup = v9fs_vfs_lookup, |
862 | .link = v9fs_vfs_link_dotl, | |
863 | .symlink = v9fs_vfs_symlink_dotl, | |
864 | .unlink = v9fs_vfs_unlink, | |
865 | .mkdir = v9fs_vfs_mkdir_dotl, | |
866 | .rmdir = v9fs_vfs_rmdir, | |
867 | .mknod = v9fs_vfs_mknod_dotl, | |
868 | .rename = v9fs_vfs_rename, | |
869 | .getattr = v9fs_vfs_getattr_dotl, | |
870 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e | 871 | .listxattr = v9fs_listxattr, |
6cd4d4e8 CB |
872 | .get_inode_acl = v9fs_iop_get_inode_acl, |
873 | .get_acl = v9fs_iop_get_acl, | |
079da629 | 874 | .set_acl = v9fs_iop_set_acl, |
53c06f4e AK |
875 | }; |
876 | ||
877 | const struct inode_operations v9fs_file_inode_operations_dotl = { | |
878 | .getattr = v9fs_vfs_getattr_dotl, | |
879 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e | 880 | .listxattr = v9fs_listxattr, |
6cd4d4e8 CB |
881 | .get_inode_acl = v9fs_iop_get_inode_acl, |
882 | .get_acl = v9fs_iop_get_acl, | |
079da629 | 883 | .set_acl = v9fs_iop_set_acl, |
53c06f4e AK |
884 | }; |
885 | ||
886 | const struct inode_operations v9fs_symlink_inode_operations_dotl = { | |
6b255391 | 887 | .get_link = v9fs_vfs_get_link_dotl, |
53c06f4e AK |
888 | .getattr = v9fs_vfs_getattr_dotl, |
889 | .setattr = v9fs_vfs_setattr_dotl, | |
53c06f4e AK |
890 | .listxattr = v9fs_listxattr, |
891 | }; |