Commit | Line | Data |
---|---|---|
53c06f4e AK |
1 | /* |
2 | * linux/fs/9p/vfs_inode_dotl.c | |
3 | * | |
4 | * This file contains vfs inode ops for the 9P2000.L protocol. | |
5 | * | |
6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 | |
11 | * as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/file.h> | |
30 | #include <linux/pagemap.h> | |
31 | #include <linux/stat.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/inet.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/idr.h> | |
36 | #include <linux/sched.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/xattr.h> | |
39 | #include <linux/posix_acl.h> | |
40 | #include <net/9p/9p.h> | |
41 | #include <net/9p/client.h> | |
42 | ||
43 | #include "v9fs.h" | |
44 | #include "v9fs_vfs.h" | |
45 | #include "fid.h" | |
46 | #include "cache.h" | |
47 | #include "xattr.h" | |
48 | #include "acl.h" | |
49 | ||
50 | static int | |
51 | v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, | |
52 | dev_t rdev); | |
53 | ||
54 | /** | |
55 | * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a | |
56 | * new file system object. This checks the S_ISGID to determine the owning | |
57 | * group of the new file system object. | |
58 | */ | |
59 | ||
60 | static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) | |
61 | { | |
62 | BUG_ON(dir_inode == NULL); | |
63 | ||
64 | if (dir_inode->i_mode & S_ISGID) { | |
65 | /* set_gid bit is set.*/ | |
66 | return dir_inode->i_gid; | |
67 | } | |
68 | return current_fsgid(); | |
69 | } | |
70 | ||
71 | /** | |
72 | * v9fs_dentry_from_dir_inode - helper function to get the dentry from | |
73 | * dir inode. | |
74 | * | |
75 | */ | |
76 | ||
77 | static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) | |
78 | { | |
79 | struct dentry *dentry; | |
80 | ||
81 | spin_lock(&inode->i_lock); | |
82 | /* Directory should have only one entry. */ | |
83 | BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); | |
84 | dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); | |
85 | spin_unlock(&inode->i_lock); | |
86 | return dentry; | |
87 | } | |
88 | ||
fd2421f5 AK |
89 | static int v9fs_test_inode_dotl(struct inode *inode, void *data) |
90 | { | |
91 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
92 | struct p9_stat_dotl *st = (struct p9_stat_dotl *)data; | |
93 | ||
94 | /* don't match inode of different type */ | |
95 | if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT)) | |
96 | return 0; | |
97 | ||
98 | if (inode->i_generation != st->st_gen) | |
99 | return 0; | |
100 | ||
101 | /* compare qid details */ | |
102 | if (memcmp(&v9inode->qid.version, | |
103 | &st->qid.version, sizeof(v9inode->qid.version))) | |
104 | return 0; | |
105 | ||
106 | if (v9inode->qid.type != st->qid.type) | |
107 | return 0; | |
108 | return 1; | |
109 | } | |
110 | ||
ed80fcfa AK |
111 | /* Always get a new inode */ |
112 | static int v9fs_test_new_inode_dotl(struct inode *inode, void *data) | |
113 | { | |
114 | return 0; | |
115 | } | |
116 | ||
fd2421f5 AK |
117 | static int v9fs_set_inode_dotl(struct inode *inode, void *data) |
118 | { | |
119 | struct v9fs_inode *v9inode = V9FS_I(inode); | |
120 | struct p9_stat_dotl *st = (struct p9_stat_dotl *)data; | |
121 | ||
122 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); | |
123 | inode->i_generation = st->st_gen; | |
124 | return 0; | |
125 | } | |
126 | ||
5ffc0cb3 AK |
127 | static struct inode *v9fs_qid_iget_dotl(struct super_block *sb, |
128 | struct p9_qid *qid, | |
129 | struct p9_fid *fid, | |
ed80fcfa AK |
130 | struct p9_stat_dotl *st, |
131 | int new) | |
5ffc0cb3 AK |
132 | { |
133 | int retval; | |
134 | unsigned long i_ino; | |
135 | struct inode *inode; | |
136 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
ed80fcfa AK |
137 | int (*test)(struct inode *, void *); |
138 | ||
139 | if (new) | |
140 | test = v9fs_test_new_inode_dotl; | |
141 | else | |
142 | test = v9fs_test_inode_dotl; | |
5ffc0cb3 AK |
143 | |
144 | i_ino = v9fs_qid2ino(qid); | |
ed80fcfa | 145 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st); |
5ffc0cb3 AK |
146 | if (!inode) |
147 | return ERR_PTR(-ENOMEM); | |
148 | if (!(inode->i_state & I_NEW)) | |
149 | return inode; | |
150 | /* | |
151 | * initialize the inode with the stat info | |
152 | * FIXME!! we may need support for stale inodes | |
153 | * later. | |
154 | */ | |
fd2421f5 | 155 | inode->i_ino = i_ino; |
5ffc0cb3 AK |
156 | retval = v9fs_init_inode(v9ses, inode, st->st_mode); |
157 | if (retval) | |
158 | goto error; | |
159 | ||
160 | v9fs_stat2inode_dotl(st, inode); | |
161 | #ifdef CONFIG_9P_FSCACHE | |
5ffc0cb3 AK |
162 | v9fs_cache_inode_get_cookie(inode); |
163 | #endif | |
164 | retval = v9fs_get_acl(inode, fid); | |
165 | if (retval) | |
166 | goto error; | |
167 | ||
168 | unlock_new_inode(inode); | |
169 | return inode; | |
170 | error: | |
171 | unlock_new_inode(inode); | |
172 | iput(inode); | |
173 | return ERR_PTR(retval); | |
174 | ||
175 | } | |
176 | ||
53c06f4e | 177 | struct inode * |
a78ce05d | 178 | v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
ed80fcfa | 179 | struct super_block *sb, int new) |
53c06f4e | 180 | { |
53c06f4e | 181 | struct p9_stat_dotl *st; |
5ffc0cb3 | 182 | struct inode *inode = NULL; |
53c06f4e | 183 | |
fd2421f5 | 184 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN); |
53c06f4e AK |
185 | if (IS_ERR(st)) |
186 | return ERR_CAST(st); | |
187 | ||
ed80fcfa | 188 | inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new); |
53c06f4e | 189 | kfree(st); |
5ffc0cb3 | 190 | return inode; |
53c06f4e AK |
191 | } |
192 | ||
193 | /** | |
194 | * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. | |
195 | * @dir: directory inode that is being created | |
196 | * @dentry: dentry that is being deleted | |
197 | * @mode: create permissions | |
198 | * @nd: path information | |
199 | * | |
200 | */ | |
201 | ||
202 | static int | |
203 | v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode, | |
204 | struct nameidata *nd) | |
205 | { | |
206 | int err = 0; | |
53c06f4e AK |
207 | gid_t gid; |
208 | int flags; | |
209 | mode_t mode; | |
6b39f6d2 | 210 | char *name = NULL; |
53c06f4e AK |
211 | struct file *filp; |
212 | struct p9_qid qid; | |
213 | struct inode *inode; | |
6b39f6d2 AK |
214 | struct p9_fid *fid = NULL; |
215 | struct v9fs_inode *v9inode; | |
216 | struct p9_fid *dfid, *ofid, *inode_fid; | |
217 | struct v9fs_session_info *v9ses; | |
53c06f4e AK |
218 | struct posix_acl *pacl = NULL, *dacl = NULL; |
219 | ||
220 | v9ses = v9fs_inode2v9ses(dir); | |
dd7dd556 | 221 | if (nd) |
8a5e929d | 222 | flags = nd->intent.open.flags; |
53c06f4e AK |
223 | else { |
224 | /* | |
225 | * create call without LOOKUP_OPEN is due | |
226 | * to mknod of regular files. So use mknod | |
227 | * operation. | |
228 | */ | |
229 | return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0); | |
230 | } | |
231 | ||
232 | name = (char *) dentry->d_name.name; | |
233 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " | |
234 | "mode:0x%x\n", name, flags, omode); | |
235 | ||
236 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
237 | if (IS_ERR(dfid)) { | |
238 | err = PTR_ERR(dfid); | |
239 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
240 | return err; | |
241 | } | |
242 | ||
243 | /* clone a fid to use for creation */ | |
244 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
245 | if (IS_ERR(ofid)) { | |
246 | err = PTR_ERR(ofid); | |
247 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); | |
248 | return err; | |
249 | } | |
250 | ||
251 | gid = v9fs_get_fsgid_for_create(dir); | |
252 | ||
253 | mode = omode; | |
254 | /* Update mode based on ACL value */ | |
255 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
256 | if (err) { | |
257 | P9_DPRINTK(P9_DEBUG_VFS, | |
258 | "Failed to get acl values in creat %d\n", err); | |
259 | goto error; | |
260 | } | |
261 | err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); | |
262 | if (err < 0) { | |
263 | P9_DPRINTK(P9_DEBUG_VFS, | |
264 | "p9_client_open_dotl failed in creat %d\n", | |
265 | err); | |
266 | goto error; | |
267 | } | |
d28c61f0 | 268 | v9fs_invalidate_inode_attr(dir); |
53c06f4e | 269 | |
af7542fc AK |
270 | /* instantiate inode and assign the unopened fid to the dentry */ |
271 | fid = p9_client_walk(dfid, 1, &name, 1); | |
272 | if (IS_ERR(fid)) { | |
273 | err = PTR_ERR(fid); | |
c25a61f5 | 274 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
53c06f4e | 275 | fid = NULL; |
af7542fc | 276 | goto error; |
53c06f4e | 277 | } |
ed80fcfa | 278 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
af7542fc AK |
279 | if (IS_ERR(inode)) { |
280 | err = PTR_ERR(inode); | |
281 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); | |
282 | goto error; | |
283 | } | |
af7542fc AK |
284 | d_instantiate(dentry, inode); |
285 | err = v9fs_fid_add(dentry, fid); | |
286 | if (err < 0) | |
287 | goto error; | |
288 | ||
53c06f4e | 289 | /* Now set the ACL based on the default value */ |
1ec95bf3 | 290 | v9fs_set_create_acl(dentry, &dacl, &pacl); |
6b39f6d2 AK |
291 | |
292 | v9inode = V9FS_I(inode); | |
5a7e0a8c | 293 | mutex_lock(&v9inode->v_mutex); |
7add697a AK |
294 | if (v9ses->cache && !v9inode->writeback_fid && |
295 | ((flags & O_ACCMODE) != O_RDONLY)) { | |
3cf387d7 | 296 | /* |
6b39f6d2 | 297 | * clone a fid and add it to writeback_fid |
3cf387d7 AK |
298 | * we do it during open time instead of |
299 | * page dirty time via write_begin/page_mkwrite | |
300 | * because we want write after unlink usecase | |
301 | * to work. | |
302 | */ | |
303 | inode_fid = v9fs_writeback_fid(dentry); | |
304 | if (IS_ERR(inode_fid)) { | |
305 | err = PTR_ERR(inode_fid); | |
5a7e0a8c | 306 | mutex_unlock(&v9inode->v_mutex); |
398c4f0e | 307 | goto err_clunk_old_fid; |
3cf387d7 | 308 | } |
6b39f6d2 | 309 | v9inode->writeback_fid = (void *) inode_fid; |
3cf387d7 | 310 | } |
5a7e0a8c | 311 | mutex_unlock(&v9inode->v_mutex); |
af7542fc AK |
312 | /* Since we are opening a file, assign the open fid to the file */ |
313 | filp = lookup_instantiate_filp(nd, dentry, generic_file_open); | |
314 | if (IS_ERR(filp)) { | |
398c4f0e AK |
315 | err = PTR_ERR(filp); |
316 | goto err_clunk_old_fid; | |
af7542fc AK |
317 | } |
318 | filp->private_data = ofid; | |
46848de0 AK |
319 | #ifdef CONFIG_9P_FSCACHE |
320 | if (v9ses->cache) | |
321 | v9fs_cache_inode_set_cookie(inode, filp); | |
322 | #endif | |
53c06f4e AK |
323 | return 0; |
324 | ||
325 | error: | |
53c06f4e AK |
326 | if (fid) |
327 | p9_client_clunk(fid); | |
398c4f0e AK |
328 | err_clunk_old_fid: |
329 | if (ofid) | |
330 | p9_client_clunk(ofid); | |
1ec95bf3 | 331 | v9fs_set_create_acl(NULL, &dacl, &pacl); |
53c06f4e AK |
332 | return err; |
333 | } | |
334 | ||
335 | /** | |
336 | * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory | |
337 | * @dir: inode that is being unlinked | |
338 | * @dentry: dentry that is being unlinked | |
339 | * @mode: mode for new directory | |
340 | * | |
341 | */ | |
342 | ||
343 | static int v9fs_vfs_mkdir_dotl(struct inode *dir, | |
344 | struct dentry *dentry, int omode) | |
345 | { | |
346 | int err; | |
347 | struct v9fs_session_info *v9ses; | |
348 | struct p9_fid *fid = NULL, *dfid = NULL; | |
349 | gid_t gid; | |
350 | char *name; | |
351 | mode_t mode; | |
352 | struct inode *inode; | |
353 | struct p9_qid qid; | |
354 | struct dentry *dir_dentry; | |
355 | struct posix_acl *dacl = NULL, *pacl = NULL; | |
356 | ||
357 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); | |
358 | err = 0; | |
359 | v9ses = v9fs_inode2v9ses(dir); | |
360 | ||
361 | omode |= S_IFDIR; | |
362 | if (dir->i_mode & S_ISGID) | |
363 | omode |= S_ISGID; | |
364 | ||
365 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
366 | dfid = v9fs_fid_lookup(dir_dentry); | |
367 | if (IS_ERR(dfid)) { | |
368 | err = PTR_ERR(dfid); | |
369 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
370 | dfid = NULL; | |
371 | goto error; | |
372 | } | |
373 | ||
374 | gid = v9fs_get_fsgid_for_create(dir); | |
375 | mode = omode; | |
376 | /* Update mode based on ACL value */ | |
377 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
378 | if (err) { | |
379 | P9_DPRINTK(P9_DEBUG_VFS, | |
380 | "Failed to get acl values in mkdir %d\n", err); | |
381 | goto error; | |
382 | } | |
383 | name = (char *) dentry->d_name.name; | |
384 | err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); | |
385 | if (err < 0) | |
386 | goto error; | |
387 | ||
388 | /* instantiate inode and assign the unopened fid to the dentry */ | |
389 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
390 | fid = p9_client_walk(dfid, 1, &name, 1); | |
391 | if (IS_ERR(fid)) { | |
392 | err = PTR_ERR(fid); | |
393 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
394 | err); | |
395 | fid = NULL; | |
396 | goto error; | |
397 | } | |
398 | ||
ed80fcfa | 399 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
400 | if (IS_ERR(inode)) { |
401 | err = PTR_ERR(inode); | |
402 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
403 | err); | |
404 | goto error; | |
405 | } | |
53c06f4e AK |
406 | d_instantiate(dentry, inode); |
407 | err = v9fs_fid_add(dentry, fid); | |
408 | if (err < 0) | |
409 | goto error; | |
410 | fid = NULL; | |
411 | } else { | |
412 | /* | |
413 | * Not in cached mode. No need to populate | |
414 | * inode with stat. We need to get an inode | |
415 | * so that we can set the acl with dentry | |
416 | */ | |
417 | inode = v9fs_get_inode(dir->i_sb, mode); | |
418 | if (IS_ERR(inode)) { | |
419 | err = PTR_ERR(inode); | |
420 | goto error; | |
421 | } | |
53c06f4e AK |
422 | d_instantiate(dentry, inode); |
423 | } | |
424 | /* Now set the ACL based on the default value */ | |
1ec95bf3 | 425 | v9fs_set_create_acl(dentry, &dacl, &pacl); |
b271ec47 | 426 | inc_nlink(dir); |
d28c61f0 | 427 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
428 | error: |
429 | if (fid) | |
430 | p9_client_clunk(fid); | |
1ec95bf3 | 431 | v9fs_set_create_acl(NULL, &dacl, &pacl); |
53c06f4e AK |
432 | return err; |
433 | } | |
434 | ||
435 | static int | |
436 | v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, | |
437 | struct kstat *stat) | |
438 | { | |
439 | int err; | |
440 | struct v9fs_session_info *v9ses; | |
441 | struct p9_fid *fid; | |
442 | struct p9_stat_dotl *st; | |
443 | ||
444 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
445 | err = -EPERM; | |
42869c8a | 446 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 AK |
447 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
448 | generic_fillattr(dentry->d_inode, stat); | |
449 | return 0; | |
450 | } | |
53c06f4e AK |
451 | fid = v9fs_fid_lookup(dentry); |
452 | if (IS_ERR(fid)) | |
453 | return PTR_ERR(fid); | |
454 | ||
455 | /* Ask for all the fields in stat structure. Server will return | |
456 | * whatever it supports | |
457 | */ | |
458 | ||
459 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
460 | if (IS_ERR(st)) | |
461 | return PTR_ERR(st); | |
462 | ||
463 | v9fs_stat2inode_dotl(st, dentry->d_inode); | |
464 | generic_fillattr(dentry->d_inode, stat); | |
465 | /* Change block size to what the server returned */ | |
466 | stat->blksize = st->st_blksize; | |
467 | ||
468 | kfree(st); | |
469 | return 0; | |
470 | } | |
471 | ||
472 | /** | |
473 | * v9fs_vfs_setattr_dotl - set file metadata | |
474 | * @dentry: file whose metadata to set | |
475 | * @iattr: metadata assignment structure | |
476 | * | |
477 | */ | |
478 | ||
479 | int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) | |
480 | { | |
481 | int retval; | |
482 | struct v9fs_session_info *v9ses; | |
483 | struct p9_fid *fid; | |
484 | struct p9_iattr_dotl p9attr; | |
485 | ||
486 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); | |
487 | ||
488 | retval = inode_change_ok(dentry->d_inode, iattr); | |
489 | if (retval) | |
490 | return retval; | |
491 | ||
492 | p9attr.valid = iattr->ia_valid; | |
493 | p9attr.mode = iattr->ia_mode; | |
494 | p9attr.uid = iattr->ia_uid; | |
495 | p9attr.gid = iattr->ia_gid; | |
496 | p9attr.size = iattr->ia_size; | |
497 | p9attr.atime_sec = iattr->ia_atime.tv_sec; | |
498 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; | |
499 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; | |
500 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; | |
501 | ||
502 | retval = -EPERM; | |
42869c8a | 503 | v9ses = v9fs_dentry2v9ses(dentry); |
53c06f4e AK |
504 | fid = v9fs_fid_lookup(dentry); |
505 | if (IS_ERR(fid)) | |
506 | return PTR_ERR(fid); | |
507 | ||
3dc5436a AK |
508 | /* Write all dirty data */ |
509 | if (S_ISREG(dentry->d_inode->i_mode)) | |
510 | filemap_write_and_wait(dentry->d_inode->i_mapping); | |
511 | ||
f10fc50f AK |
512 | retval = p9_client_setattr(fid, &p9attr); |
513 | if (retval < 0) | |
514 | return retval; | |
53c06f4e | 515 | |
059c138b AK |
516 | if ((iattr->ia_valid & ATTR_SIZE) && |
517 | iattr->ia_size != i_size_read(dentry->d_inode)) | |
518 | truncate_setsize(dentry->d_inode, iattr->ia_size); | |
519 | ||
520 | v9fs_invalidate_inode_attr(dentry->d_inode); | |
53c06f4e AK |
521 | setattr_copy(dentry->d_inode, iattr); |
522 | mark_inode_dirty(dentry->d_inode); | |
523 | if (iattr->ia_valid & ATTR_MODE) { | |
524 | /* We also want to update ACL when we update mode bits */ | |
525 | retval = v9fs_acl_chmod(dentry); | |
526 | if (retval < 0) | |
527 | return retval; | |
528 | } | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /** | |
533 | * v9fs_stat2inode_dotl - populate an inode structure with stat info | |
534 | * @stat: stat structure | |
535 | * @inode: inode to populate | |
536 | * @sb: superblock of filesystem | |
537 | * | |
538 | */ | |
539 | ||
540 | void | |
541 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) | |
542 | { | |
b3cbea03 | 543 | struct v9fs_inode *v9inode = V9FS_I(inode); |
53c06f4e AK |
544 | |
545 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { | |
546 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
547 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
548 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
549 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
550 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
551 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
552 | inode->i_uid = stat->st_uid; | |
553 | inode->i_gid = stat->st_gid; | |
554 | inode->i_nlink = stat->st_nlink; | |
555 | inode->i_mode = stat->st_mode; | |
556 | inode->i_rdev = new_decode_dev(stat->st_rdev); | |
557 | ||
558 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) | |
559 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
560 | ||
561 | i_size_write(inode, stat->st_size); | |
562 | inode->i_blocks = stat->st_blocks; | |
563 | } else { | |
564 | if (stat->st_result_mask & P9_STATS_ATIME) { | |
565 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
566 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
567 | } | |
568 | if (stat->st_result_mask & P9_STATS_MTIME) { | |
569 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
570 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
571 | } | |
572 | if (stat->st_result_mask & P9_STATS_CTIME) { | |
573 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
574 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
575 | } | |
576 | if (stat->st_result_mask & P9_STATS_UID) | |
577 | inode->i_uid = stat->st_uid; | |
578 | if (stat->st_result_mask & P9_STATS_GID) | |
579 | inode->i_gid = stat->st_gid; | |
580 | if (stat->st_result_mask & P9_STATS_NLINK) | |
581 | inode->i_nlink = stat->st_nlink; | |
582 | if (stat->st_result_mask & P9_STATS_MODE) { | |
583 | inode->i_mode = stat->st_mode; | |
584 | if ((S_ISBLK(inode->i_mode)) || | |
585 | (S_ISCHR(inode->i_mode))) | |
586 | init_special_inode(inode, inode->i_mode, | |
587 | inode->i_rdev); | |
588 | } | |
589 | if (stat->st_result_mask & P9_STATS_RDEV) | |
590 | inode->i_rdev = new_decode_dev(stat->st_rdev); | |
591 | if (stat->st_result_mask & P9_STATS_SIZE) | |
592 | i_size_write(inode, stat->st_size); | |
593 | if (stat->st_result_mask & P9_STATS_BLOCKS) | |
594 | inode->i_blocks = stat->st_blocks; | |
595 | } | |
596 | if (stat->st_result_mask & P9_STATS_GEN) | |
fd2421f5 | 597 | inode->i_generation = stat->st_gen; |
53c06f4e AK |
598 | |
599 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION | |
600 | * because the inode structure does not have fields for them. | |
601 | */ | |
b3cbea03 | 602 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
53c06f4e AK |
603 | } |
604 | ||
605 | static int | |
606 | v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, | |
607 | const char *symname) | |
608 | { | |
53c06f4e AK |
609 | int err; |
610 | gid_t gid; | |
d28c61f0 AK |
611 | char *name; |
612 | struct p9_qid qid; | |
613 | struct inode *inode; | |
614 | struct p9_fid *dfid; | |
615 | struct p9_fid *fid = NULL; | |
616 | struct v9fs_session_info *v9ses; | |
53c06f4e AK |
617 | |
618 | name = (char *) dentry->d_name.name; | |
619 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", | |
620 | dir->i_ino, name, symname); | |
621 | v9ses = v9fs_inode2v9ses(dir); | |
622 | ||
623 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
624 | if (IS_ERR(dfid)) { | |
625 | err = PTR_ERR(dfid); | |
626 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
627 | return err; | |
628 | } | |
629 | ||
630 | gid = v9fs_get_fsgid_for_create(dir); | |
631 | ||
632 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ | |
633 | err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); | |
634 | ||
635 | if (err < 0) { | |
636 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); | |
637 | goto error; | |
638 | } | |
639 | ||
d28c61f0 | 640 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
641 | if (v9ses->cache) { |
642 | /* Now walk from the parent so we can get an unopened fid. */ | |
643 | fid = p9_client_walk(dfid, 1, &name, 1); | |
644 | if (IS_ERR(fid)) { | |
645 | err = PTR_ERR(fid); | |
646 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
647 | err); | |
648 | fid = NULL; | |
649 | goto error; | |
650 | } | |
651 | ||
652 | /* instantiate inode and assign the unopened fid to dentry */ | |
ed80fcfa | 653 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
654 | if (IS_ERR(inode)) { |
655 | err = PTR_ERR(inode); | |
656 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
657 | err); | |
658 | goto error; | |
659 | } | |
53c06f4e AK |
660 | d_instantiate(dentry, inode); |
661 | err = v9fs_fid_add(dentry, fid); | |
662 | if (err < 0) | |
663 | goto error; | |
664 | fid = NULL; | |
665 | } else { | |
666 | /* Not in cached mode. No need to populate inode with stat */ | |
667 | inode = v9fs_get_inode(dir->i_sb, S_IFLNK); | |
668 | if (IS_ERR(inode)) { | |
669 | err = PTR_ERR(inode); | |
670 | goto error; | |
671 | } | |
53c06f4e AK |
672 | d_instantiate(dentry, inode); |
673 | } | |
674 | ||
675 | error: | |
676 | if (fid) | |
677 | p9_client_clunk(fid); | |
678 | ||
679 | return err; | |
680 | } | |
681 | ||
682 | /** | |
683 | * v9fs_vfs_link_dotl - create a hardlink for dotl | |
684 | * @old_dentry: dentry for file to link to | |
685 | * @dir: inode destination for new link | |
686 | * @dentry: dentry for link | |
687 | * | |
688 | */ | |
689 | ||
690 | static int | |
691 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, | |
692 | struct dentry *dentry) | |
693 | { | |
694 | int err; | |
53c06f4e | 695 | char *name; |
53c06f4e | 696 | struct dentry *dir_dentry; |
d28c61f0 AK |
697 | struct p9_fid *dfid, *oldfid; |
698 | struct v9fs_session_info *v9ses; | |
53c06f4e AK |
699 | |
700 | P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", | |
701 | dir->i_ino, old_dentry->d_name.name, | |
702 | dentry->d_name.name); | |
703 | ||
704 | v9ses = v9fs_inode2v9ses(dir); | |
705 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
706 | dfid = v9fs_fid_lookup(dir_dentry); | |
707 | if (IS_ERR(dfid)) | |
708 | return PTR_ERR(dfid); | |
709 | ||
710 | oldfid = v9fs_fid_lookup(old_dentry); | |
711 | if (IS_ERR(oldfid)) | |
712 | return PTR_ERR(oldfid); | |
713 | ||
714 | name = (char *) dentry->d_name.name; | |
715 | ||
716 | err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); | |
717 | ||
718 | if (err < 0) { | |
719 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); | |
720 | return err; | |
721 | } | |
722 | ||
d28c61f0 | 723 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
724 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
725 | /* Get the latest stat info from server. */ | |
726 | struct p9_fid *fid; | |
53c06f4e AK |
727 | fid = v9fs_fid_lookup(old_dentry); |
728 | if (IS_ERR(fid)) | |
729 | return PTR_ERR(fid); | |
730 | ||
c06c066a | 731 | v9fs_refresh_inode_dotl(fid, old_dentry->d_inode); |
53c06f4e | 732 | } |
20656a49 | 733 | ihold(old_dentry->d_inode); |
53c06f4e AK |
734 | d_instantiate(dentry, old_dentry->d_inode); |
735 | ||
736 | return err; | |
737 | } | |
738 | ||
739 | /** | |
740 | * v9fs_vfs_mknod_dotl - create a special file | |
741 | * @dir: inode destination for new link | |
742 | * @dentry: dentry for file | |
743 | * @mode: mode for creation | |
744 | * @rdev: device associated with special file | |
745 | * | |
746 | */ | |
747 | static int | |
748 | v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, | |
749 | dev_t rdev) | |
750 | { | |
751 | int err; | |
d28c61f0 | 752 | gid_t gid; |
53c06f4e AK |
753 | char *name; |
754 | mode_t mode; | |
755 | struct v9fs_session_info *v9ses; | |
756 | struct p9_fid *fid = NULL, *dfid = NULL; | |
757 | struct inode *inode; | |
53c06f4e AK |
758 | struct p9_qid qid; |
759 | struct dentry *dir_dentry; | |
760 | struct posix_acl *dacl = NULL, *pacl = NULL; | |
761 | ||
762 | P9_DPRINTK(P9_DEBUG_VFS, | |
763 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
764 | dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); | |
765 | ||
766 | if (!new_valid_dev(rdev)) | |
767 | return -EINVAL; | |
768 | ||
769 | v9ses = v9fs_inode2v9ses(dir); | |
770 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
771 | dfid = v9fs_fid_lookup(dir_dentry); | |
772 | if (IS_ERR(dfid)) { | |
773 | err = PTR_ERR(dfid); | |
774 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
775 | dfid = NULL; | |
776 | goto error; | |
777 | } | |
778 | ||
779 | gid = v9fs_get_fsgid_for_create(dir); | |
780 | mode = omode; | |
781 | /* Update mode based on ACL value */ | |
782 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
783 | if (err) { | |
784 | P9_DPRINTK(P9_DEBUG_VFS, | |
785 | "Failed to get acl values in mknod %d\n", err); | |
786 | goto error; | |
787 | } | |
788 | name = (char *) dentry->d_name.name; | |
789 | ||
790 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); | |
791 | if (err < 0) | |
792 | goto error; | |
793 | ||
d28c61f0 | 794 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
795 | /* instantiate inode and assign the unopened fid to the dentry */ |
796 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
797 | fid = p9_client_walk(dfid, 1, &name, 1); | |
798 | if (IS_ERR(fid)) { | |
799 | err = PTR_ERR(fid); | |
800 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
801 | err); | |
802 | fid = NULL; | |
803 | goto error; | |
804 | } | |
805 | ||
ed80fcfa | 806 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
807 | if (IS_ERR(inode)) { |
808 | err = PTR_ERR(inode); | |
809 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
810 | err); | |
811 | goto error; | |
812 | } | |
53c06f4e AK |
813 | d_instantiate(dentry, inode); |
814 | err = v9fs_fid_add(dentry, fid); | |
815 | if (err < 0) | |
816 | goto error; | |
817 | fid = NULL; | |
818 | } else { | |
819 | /* | |
820 | * Not in cached mode. No need to populate inode with stat. | |
821 | * socket syscall returns a fd, so we need instantiate | |
822 | */ | |
823 | inode = v9fs_get_inode(dir->i_sb, mode); | |
824 | if (IS_ERR(inode)) { | |
825 | err = PTR_ERR(inode); | |
826 | goto error; | |
827 | } | |
53c06f4e AK |
828 | d_instantiate(dentry, inode); |
829 | } | |
830 | /* Now set the ACL based on the default value */ | |
1ec95bf3 | 831 | v9fs_set_create_acl(dentry, &dacl, &pacl); |
53c06f4e AK |
832 | error: |
833 | if (fid) | |
834 | p9_client_clunk(fid); | |
1ec95bf3 | 835 | v9fs_set_create_acl(NULL, &dacl, &pacl); |
53c06f4e AK |
836 | return err; |
837 | } | |
838 | ||
53c06f4e AK |
839 | /** |
840 | * v9fs_vfs_follow_link_dotl - follow a symlink path | |
841 | * @dentry: dentry for symlink | |
842 | * @nd: nameidata | |
843 | * | |
844 | */ | |
845 | ||
846 | static void * | |
847 | v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd) | |
848 | { | |
31b6ceac MK |
849 | int retval; |
850 | struct p9_fid *fid; | |
53c06f4e | 851 | char *link = __getname(); |
31b6ceac | 852 | char *target; |
53c06f4e | 853 | |
31b6ceac | 854 | P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name); |
53c06f4e | 855 | |
31b6ceac | 856 | if (!link) { |
53c06f4e | 857 | link = ERR_PTR(-ENOMEM); |
31b6ceac | 858 | goto ndset; |
53c06f4e | 859 | } |
31b6ceac MK |
860 | fid = v9fs_fid_lookup(dentry); |
861 | if (IS_ERR(fid)) { | |
862 | __putname(link); | |
936bb2d7 | 863 | link = ERR_CAST(fid); |
31b6ceac MK |
864 | goto ndset; |
865 | } | |
866 | retval = p9_client_readlink(fid, &target); | |
867 | if (!retval) { | |
868 | strcpy(link, target); | |
869 | kfree(target); | |
870 | goto ndset; | |
871 | } | |
872 | __putname(link); | |
873 | link = ERR_PTR(retval); | |
874 | ndset: | |
53c06f4e | 875 | nd_set_link(nd, link); |
53c06f4e AK |
876 | return NULL; |
877 | } | |
878 | ||
b3cbea03 AK |
879 | int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode) |
880 | { | |
881 | loff_t i_size; | |
882 | struct p9_stat_dotl *st; | |
883 | struct v9fs_session_info *v9ses; | |
884 | ||
885 | v9ses = v9fs_inode2v9ses(inode); | |
886 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
887 | if (IS_ERR(st)) | |
888 | return PTR_ERR(st); | |
889 | ||
890 | spin_lock(&inode->i_lock); | |
891 | /* | |
892 | * We don't want to refresh inode->i_size, | |
893 | * because we may have cached data | |
894 | */ | |
895 | i_size = inode->i_size; | |
896 | v9fs_stat2inode_dotl(st, inode); | |
897 | if (v9ses->cache) | |
898 | inode->i_size = i_size; | |
899 | spin_unlock(&inode->i_lock); | |
900 | kfree(st); | |
901 | return 0; | |
902 | } | |
903 | ||
53c06f4e AK |
904 | const struct inode_operations v9fs_dir_inode_operations_dotl = { |
905 | .create = v9fs_vfs_create_dotl, | |
906 | .lookup = v9fs_vfs_lookup, | |
907 | .link = v9fs_vfs_link_dotl, | |
908 | .symlink = v9fs_vfs_symlink_dotl, | |
909 | .unlink = v9fs_vfs_unlink, | |
910 | .mkdir = v9fs_vfs_mkdir_dotl, | |
911 | .rmdir = v9fs_vfs_rmdir, | |
912 | .mknod = v9fs_vfs_mknod_dotl, | |
913 | .rename = v9fs_vfs_rename, | |
914 | .getattr = v9fs_vfs_getattr_dotl, | |
915 | .setattr = v9fs_vfs_setattr_dotl, | |
916 | .setxattr = generic_setxattr, | |
917 | .getxattr = generic_getxattr, | |
918 | .removexattr = generic_removexattr, | |
919 | .listxattr = v9fs_listxattr, | |
4e34e719 | 920 | .get_acl = v9fs_iop_get_acl, |
53c06f4e AK |
921 | }; |
922 | ||
923 | const struct inode_operations v9fs_file_inode_operations_dotl = { | |
924 | .getattr = v9fs_vfs_getattr_dotl, | |
925 | .setattr = v9fs_vfs_setattr_dotl, | |
926 | .setxattr = generic_setxattr, | |
927 | .getxattr = generic_getxattr, | |
928 | .removexattr = generic_removexattr, | |
929 | .listxattr = v9fs_listxattr, | |
4e34e719 | 930 | .get_acl = v9fs_iop_get_acl, |
53c06f4e AK |
931 | }; |
932 | ||
933 | const struct inode_operations v9fs_symlink_inode_operations_dotl = { | |
31b6ceac | 934 | .readlink = generic_readlink, |
53c06f4e AK |
935 | .follow_link = v9fs_vfs_follow_link_dotl, |
936 | .put_link = v9fs_vfs_put_link, | |
937 | .getattr = v9fs_vfs_getattr_dotl, | |
938 | .setattr = v9fs_vfs_setattr_dotl, | |
939 | .setxattr = generic_setxattr, | |
940 | .getxattr = generic_getxattr, | |
941 | .removexattr = generic_removexattr, | |
942 | .listxattr = v9fs_listxattr, | |
943 | }; |