Commit | Line | Data |
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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 | ||
5ffc0cb3 AK |
89 | static struct inode *v9fs_qid_iget_dotl(struct super_block *sb, |
90 | struct p9_qid *qid, | |
91 | struct p9_fid *fid, | |
92 | struct p9_stat_dotl *st) | |
93 | { | |
94 | int retval; | |
95 | unsigned long i_ino; | |
96 | struct inode *inode; | |
97 | struct v9fs_session_info *v9ses = sb->s_fs_info; | |
98 | ||
99 | i_ino = v9fs_qid2ino(qid); | |
100 | inode = iget_locked(sb, i_ino); | |
101 | if (!inode) | |
102 | return ERR_PTR(-ENOMEM); | |
103 | if (!(inode->i_state & I_NEW)) | |
104 | return inode; | |
105 | /* | |
106 | * initialize the inode with the stat info | |
107 | * FIXME!! we may need support for stale inodes | |
108 | * later. | |
109 | */ | |
110 | retval = v9fs_init_inode(v9ses, inode, st->st_mode); | |
111 | if (retval) | |
112 | goto error; | |
113 | ||
114 | v9fs_stat2inode_dotl(st, inode); | |
115 | #ifdef CONFIG_9P_FSCACHE | |
a78ce05d | 116 | v9fs_fscache_set_key(inode, &st->qid); |
5ffc0cb3 AK |
117 | v9fs_cache_inode_get_cookie(inode); |
118 | #endif | |
119 | retval = v9fs_get_acl(inode, fid); | |
120 | if (retval) | |
121 | goto error; | |
122 | ||
123 | unlock_new_inode(inode); | |
124 | return inode; | |
125 | error: | |
126 | unlock_new_inode(inode); | |
127 | iput(inode); | |
128 | return ERR_PTR(retval); | |
129 | ||
130 | } | |
131 | ||
53c06f4e | 132 | struct inode * |
a78ce05d AK |
133 | v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
134 | struct super_block *sb) | |
53c06f4e | 135 | { |
53c06f4e | 136 | struct p9_stat_dotl *st; |
5ffc0cb3 | 137 | struct inode *inode = NULL; |
53c06f4e AK |
138 | |
139 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); | |
140 | if (IS_ERR(st)) | |
141 | return ERR_CAST(st); | |
142 | ||
5ffc0cb3 | 143 | inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st); |
53c06f4e | 144 | kfree(st); |
5ffc0cb3 | 145 | return inode; |
53c06f4e AK |
146 | } |
147 | ||
148 | /** | |
149 | * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. | |
150 | * @dir: directory inode that is being created | |
151 | * @dentry: dentry that is being deleted | |
152 | * @mode: create permissions | |
153 | * @nd: path information | |
154 | * | |
155 | */ | |
156 | ||
157 | static int | |
158 | v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode, | |
159 | struct nameidata *nd) | |
160 | { | |
161 | int err = 0; | |
53c06f4e AK |
162 | gid_t gid; |
163 | int flags; | |
164 | mode_t mode; | |
6b39f6d2 | 165 | char *name = NULL; |
53c06f4e AK |
166 | struct file *filp; |
167 | struct p9_qid qid; | |
168 | struct inode *inode; | |
6b39f6d2 AK |
169 | struct p9_fid *fid = NULL; |
170 | struct v9fs_inode *v9inode; | |
171 | struct p9_fid *dfid, *ofid, *inode_fid; | |
172 | struct v9fs_session_info *v9ses; | |
53c06f4e AK |
173 | struct posix_acl *pacl = NULL, *dacl = NULL; |
174 | ||
175 | v9ses = v9fs_inode2v9ses(dir); | |
176 | if (nd && nd->flags & LOOKUP_OPEN) | |
177 | flags = nd->intent.open.flags - 1; | |
178 | else { | |
179 | /* | |
180 | * create call without LOOKUP_OPEN is due | |
181 | * to mknod of regular files. So use mknod | |
182 | * operation. | |
183 | */ | |
184 | return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0); | |
185 | } | |
186 | ||
187 | name = (char *) dentry->d_name.name; | |
188 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " | |
189 | "mode:0x%x\n", name, flags, omode); | |
190 | ||
191 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
192 | if (IS_ERR(dfid)) { | |
193 | err = PTR_ERR(dfid); | |
194 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
195 | return err; | |
196 | } | |
197 | ||
198 | /* clone a fid to use for creation */ | |
199 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
200 | if (IS_ERR(ofid)) { | |
201 | err = PTR_ERR(ofid); | |
202 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); | |
203 | return err; | |
204 | } | |
205 | ||
206 | gid = v9fs_get_fsgid_for_create(dir); | |
207 | ||
208 | mode = omode; | |
209 | /* Update mode based on ACL value */ | |
210 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
211 | if (err) { | |
212 | P9_DPRINTK(P9_DEBUG_VFS, | |
213 | "Failed to get acl values in creat %d\n", err); | |
214 | goto error; | |
215 | } | |
216 | err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); | |
217 | if (err < 0) { | |
218 | P9_DPRINTK(P9_DEBUG_VFS, | |
219 | "p9_client_open_dotl failed in creat %d\n", | |
220 | err); | |
221 | goto error; | |
222 | } | |
d28c61f0 | 223 | v9fs_invalidate_inode_attr(dir); |
53c06f4e | 224 | |
af7542fc AK |
225 | /* instantiate inode and assign the unopened fid to the dentry */ |
226 | fid = p9_client_walk(dfid, 1, &name, 1); | |
227 | if (IS_ERR(fid)) { | |
228 | err = PTR_ERR(fid); | |
c25a61f5 | 229 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
53c06f4e | 230 | fid = NULL; |
af7542fc | 231 | goto error; |
53c06f4e | 232 | } |
a78ce05d | 233 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
af7542fc AK |
234 | if (IS_ERR(inode)) { |
235 | err = PTR_ERR(inode); | |
236 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); | |
237 | goto error; | |
238 | } | |
af7542fc AK |
239 | d_instantiate(dentry, inode); |
240 | err = v9fs_fid_add(dentry, fid); | |
241 | if (err < 0) | |
242 | goto error; | |
243 | ||
53c06f4e AK |
244 | /* Now set the ACL based on the default value */ |
245 | v9fs_set_create_acl(dentry, dacl, pacl); | |
6b39f6d2 AK |
246 | |
247 | v9inode = V9FS_I(inode); | |
5a7e0a8c | 248 | mutex_lock(&v9inode->v_mutex); |
7add697a AK |
249 | if (v9ses->cache && !v9inode->writeback_fid && |
250 | ((flags & O_ACCMODE) != O_RDONLY)) { | |
3cf387d7 | 251 | /* |
6b39f6d2 | 252 | * clone a fid and add it to writeback_fid |
3cf387d7 AK |
253 | * we do it during open time instead of |
254 | * page dirty time via write_begin/page_mkwrite | |
255 | * because we want write after unlink usecase | |
256 | * to work. | |
257 | */ | |
258 | inode_fid = v9fs_writeback_fid(dentry); | |
259 | if (IS_ERR(inode_fid)) { | |
260 | err = PTR_ERR(inode_fid); | |
5a7e0a8c | 261 | mutex_unlock(&v9inode->v_mutex); |
3cf387d7 AK |
262 | goto error; |
263 | } | |
6b39f6d2 | 264 | v9inode->writeback_fid = (void *) inode_fid; |
3cf387d7 | 265 | } |
5a7e0a8c | 266 | mutex_unlock(&v9inode->v_mutex); |
af7542fc AK |
267 | /* Since we are opening a file, assign the open fid to the file */ |
268 | filp = lookup_instantiate_filp(nd, dentry, generic_file_open); | |
269 | if (IS_ERR(filp)) { | |
53c06f4e | 270 | p9_client_clunk(ofid); |
af7542fc AK |
271 | return PTR_ERR(filp); |
272 | } | |
273 | filp->private_data = ofid; | |
46848de0 AK |
274 | #ifdef CONFIG_9P_FSCACHE |
275 | if (v9ses->cache) | |
276 | v9fs_cache_inode_set_cookie(inode, filp); | |
277 | #endif | |
53c06f4e AK |
278 | return 0; |
279 | ||
280 | error: | |
281 | if (ofid) | |
282 | p9_client_clunk(ofid); | |
283 | if (fid) | |
284 | p9_client_clunk(fid); | |
285 | return err; | |
286 | } | |
287 | ||
288 | /** | |
289 | * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory | |
290 | * @dir: inode that is being unlinked | |
291 | * @dentry: dentry that is being unlinked | |
292 | * @mode: mode for new directory | |
293 | * | |
294 | */ | |
295 | ||
296 | static int v9fs_vfs_mkdir_dotl(struct inode *dir, | |
297 | struct dentry *dentry, int omode) | |
298 | { | |
299 | int err; | |
300 | struct v9fs_session_info *v9ses; | |
301 | struct p9_fid *fid = NULL, *dfid = NULL; | |
302 | gid_t gid; | |
303 | char *name; | |
304 | mode_t mode; | |
305 | struct inode *inode; | |
306 | struct p9_qid qid; | |
307 | struct dentry *dir_dentry; | |
308 | struct posix_acl *dacl = NULL, *pacl = NULL; | |
309 | ||
310 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); | |
311 | err = 0; | |
312 | v9ses = v9fs_inode2v9ses(dir); | |
313 | ||
314 | omode |= S_IFDIR; | |
315 | if (dir->i_mode & S_ISGID) | |
316 | omode |= S_ISGID; | |
317 | ||
318 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
319 | dfid = v9fs_fid_lookup(dir_dentry); | |
320 | if (IS_ERR(dfid)) { | |
321 | err = PTR_ERR(dfid); | |
322 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
323 | dfid = NULL; | |
324 | goto error; | |
325 | } | |
326 | ||
327 | gid = v9fs_get_fsgid_for_create(dir); | |
328 | mode = omode; | |
329 | /* Update mode based on ACL value */ | |
330 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
331 | if (err) { | |
332 | P9_DPRINTK(P9_DEBUG_VFS, | |
333 | "Failed to get acl values in mkdir %d\n", err); | |
334 | goto error; | |
335 | } | |
336 | name = (char *) dentry->d_name.name; | |
337 | err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); | |
338 | if (err < 0) | |
339 | goto error; | |
340 | ||
341 | /* instantiate inode and assign the unopened fid to the dentry */ | |
342 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
343 | fid = p9_client_walk(dfid, 1, &name, 1); | |
344 | if (IS_ERR(fid)) { | |
345 | err = PTR_ERR(fid); | |
346 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
347 | err); | |
348 | fid = NULL; | |
349 | goto error; | |
350 | } | |
351 | ||
a78ce05d | 352 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
353 | if (IS_ERR(inode)) { |
354 | err = PTR_ERR(inode); | |
355 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
356 | err); | |
357 | goto error; | |
358 | } | |
53c06f4e AK |
359 | d_instantiate(dentry, inode); |
360 | err = v9fs_fid_add(dentry, fid); | |
361 | if (err < 0) | |
362 | goto error; | |
363 | fid = NULL; | |
364 | } else { | |
365 | /* | |
366 | * Not in cached mode. No need to populate | |
367 | * inode with stat. We need to get an inode | |
368 | * so that we can set the acl with dentry | |
369 | */ | |
370 | inode = v9fs_get_inode(dir->i_sb, mode); | |
371 | if (IS_ERR(inode)) { | |
372 | err = PTR_ERR(inode); | |
373 | goto error; | |
374 | } | |
53c06f4e AK |
375 | d_instantiate(dentry, inode); |
376 | } | |
377 | /* Now set the ACL based on the default value */ | |
378 | v9fs_set_create_acl(dentry, dacl, pacl); | |
b271ec47 | 379 | inc_nlink(dir); |
d28c61f0 | 380 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
381 | error: |
382 | if (fid) | |
383 | p9_client_clunk(fid); | |
384 | return err; | |
385 | } | |
386 | ||
387 | static int | |
388 | v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, | |
389 | struct kstat *stat) | |
390 | { | |
391 | int err; | |
392 | struct v9fs_session_info *v9ses; | |
393 | struct p9_fid *fid; | |
394 | struct p9_stat_dotl *st; | |
395 | ||
396 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
397 | err = -EPERM; | |
42869c8a | 398 | v9ses = v9fs_dentry2v9ses(dentry); |
a1211908 AK |
399 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
400 | generic_fillattr(dentry->d_inode, stat); | |
401 | return 0; | |
402 | } | |
53c06f4e AK |
403 | fid = v9fs_fid_lookup(dentry); |
404 | if (IS_ERR(fid)) | |
405 | return PTR_ERR(fid); | |
406 | ||
407 | /* Ask for all the fields in stat structure. Server will return | |
408 | * whatever it supports | |
409 | */ | |
410 | ||
411 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
412 | if (IS_ERR(st)) | |
413 | return PTR_ERR(st); | |
414 | ||
415 | v9fs_stat2inode_dotl(st, dentry->d_inode); | |
416 | generic_fillattr(dentry->d_inode, stat); | |
417 | /* Change block size to what the server returned */ | |
418 | stat->blksize = st->st_blksize; | |
419 | ||
420 | kfree(st); | |
421 | return 0; | |
422 | } | |
423 | ||
424 | /** | |
425 | * v9fs_vfs_setattr_dotl - set file metadata | |
426 | * @dentry: file whose metadata to set | |
427 | * @iattr: metadata assignment structure | |
428 | * | |
429 | */ | |
430 | ||
431 | int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) | |
432 | { | |
433 | int retval; | |
434 | struct v9fs_session_info *v9ses; | |
435 | struct p9_fid *fid; | |
436 | struct p9_iattr_dotl p9attr; | |
437 | ||
438 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); | |
439 | ||
440 | retval = inode_change_ok(dentry->d_inode, iattr); | |
441 | if (retval) | |
442 | return retval; | |
443 | ||
444 | p9attr.valid = iattr->ia_valid; | |
445 | p9attr.mode = iattr->ia_mode; | |
446 | p9attr.uid = iattr->ia_uid; | |
447 | p9attr.gid = iattr->ia_gid; | |
448 | p9attr.size = iattr->ia_size; | |
449 | p9attr.atime_sec = iattr->ia_atime.tv_sec; | |
450 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; | |
451 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; | |
452 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; | |
453 | ||
454 | retval = -EPERM; | |
42869c8a | 455 | v9ses = v9fs_dentry2v9ses(dentry); |
53c06f4e AK |
456 | fid = v9fs_fid_lookup(dentry); |
457 | if (IS_ERR(fid)) | |
458 | return PTR_ERR(fid); | |
459 | ||
3dc5436a AK |
460 | /* Write all dirty data */ |
461 | if (S_ISREG(dentry->d_inode->i_mode)) | |
462 | filemap_write_and_wait(dentry->d_inode->i_mapping); | |
463 | ||
f10fc50f AK |
464 | retval = p9_client_setattr(fid, &p9attr); |
465 | if (retval < 0) | |
466 | return retval; | |
53c06f4e | 467 | |
059c138b AK |
468 | if ((iattr->ia_valid & ATTR_SIZE) && |
469 | iattr->ia_size != i_size_read(dentry->d_inode)) | |
470 | truncate_setsize(dentry->d_inode, iattr->ia_size); | |
471 | ||
472 | v9fs_invalidate_inode_attr(dentry->d_inode); | |
53c06f4e AK |
473 | setattr_copy(dentry->d_inode, iattr); |
474 | mark_inode_dirty(dentry->d_inode); | |
475 | if (iattr->ia_valid & ATTR_MODE) { | |
476 | /* We also want to update ACL when we update mode bits */ | |
477 | retval = v9fs_acl_chmod(dentry); | |
478 | if (retval < 0) | |
479 | return retval; | |
480 | } | |
481 | return 0; | |
482 | } | |
483 | ||
484 | /** | |
485 | * v9fs_stat2inode_dotl - populate an inode structure with stat info | |
486 | * @stat: stat structure | |
487 | * @inode: inode to populate | |
488 | * @sb: superblock of filesystem | |
489 | * | |
490 | */ | |
491 | ||
492 | void | |
493 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) | |
494 | { | |
b3cbea03 | 495 | struct v9fs_inode *v9inode = V9FS_I(inode); |
53c06f4e AK |
496 | |
497 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { | |
498 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
499 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
500 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
501 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
502 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
503 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
504 | inode->i_uid = stat->st_uid; | |
505 | inode->i_gid = stat->st_gid; | |
506 | inode->i_nlink = stat->st_nlink; | |
507 | inode->i_mode = stat->st_mode; | |
508 | inode->i_rdev = new_decode_dev(stat->st_rdev); | |
509 | ||
510 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) | |
511 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
512 | ||
513 | i_size_write(inode, stat->st_size); | |
514 | inode->i_blocks = stat->st_blocks; | |
515 | } else { | |
516 | if (stat->st_result_mask & P9_STATS_ATIME) { | |
517 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
518 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
519 | } | |
520 | if (stat->st_result_mask & P9_STATS_MTIME) { | |
521 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
522 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
523 | } | |
524 | if (stat->st_result_mask & P9_STATS_CTIME) { | |
525 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
526 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
527 | } | |
528 | if (stat->st_result_mask & P9_STATS_UID) | |
529 | inode->i_uid = stat->st_uid; | |
530 | if (stat->st_result_mask & P9_STATS_GID) | |
531 | inode->i_gid = stat->st_gid; | |
532 | if (stat->st_result_mask & P9_STATS_NLINK) | |
533 | inode->i_nlink = stat->st_nlink; | |
534 | if (stat->st_result_mask & P9_STATS_MODE) { | |
535 | inode->i_mode = stat->st_mode; | |
536 | if ((S_ISBLK(inode->i_mode)) || | |
537 | (S_ISCHR(inode->i_mode))) | |
538 | init_special_inode(inode, inode->i_mode, | |
539 | inode->i_rdev); | |
540 | } | |
541 | if (stat->st_result_mask & P9_STATS_RDEV) | |
542 | inode->i_rdev = new_decode_dev(stat->st_rdev); | |
543 | if (stat->st_result_mask & P9_STATS_SIZE) | |
544 | i_size_write(inode, stat->st_size); | |
545 | if (stat->st_result_mask & P9_STATS_BLOCKS) | |
546 | inode->i_blocks = stat->st_blocks; | |
547 | } | |
548 | if (stat->st_result_mask & P9_STATS_GEN) | |
549 | inode->i_generation = stat->st_gen; | |
550 | ||
551 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION | |
552 | * because the inode structure does not have fields for them. | |
553 | */ | |
b3cbea03 | 554 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
53c06f4e AK |
555 | } |
556 | ||
557 | static int | |
558 | v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, | |
559 | const char *symname) | |
560 | { | |
53c06f4e AK |
561 | int err; |
562 | gid_t gid; | |
d28c61f0 AK |
563 | char *name; |
564 | struct p9_qid qid; | |
565 | struct inode *inode; | |
566 | struct p9_fid *dfid; | |
567 | struct p9_fid *fid = NULL; | |
568 | struct v9fs_session_info *v9ses; | |
53c06f4e AK |
569 | |
570 | name = (char *) dentry->d_name.name; | |
571 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", | |
572 | dir->i_ino, name, symname); | |
573 | v9ses = v9fs_inode2v9ses(dir); | |
574 | ||
575 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
576 | if (IS_ERR(dfid)) { | |
577 | err = PTR_ERR(dfid); | |
578 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
579 | return err; | |
580 | } | |
581 | ||
582 | gid = v9fs_get_fsgid_for_create(dir); | |
583 | ||
584 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ | |
585 | err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); | |
586 | ||
587 | if (err < 0) { | |
588 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); | |
589 | goto error; | |
590 | } | |
591 | ||
d28c61f0 | 592 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
593 | if (v9ses->cache) { |
594 | /* Now walk from the parent so we can get an unopened fid. */ | |
595 | fid = p9_client_walk(dfid, 1, &name, 1); | |
596 | if (IS_ERR(fid)) { | |
597 | err = PTR_ERR(fid); | |
598 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
599 | err); | |
600 | fid = NULL; | |
601 | goto error; | |
602 | } | |
603 | ||
604 | /* instantiate inode and assign the unopened fid to dentry */ | |
a78ce05d | 605 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
606 | if (IS_ERR(inode)) { |
607 | err = PTR_ERR(inode); | |
608 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
609 | err); | |
610 | goto error; | |
611 | } | |
53c06f4e AK |
612 | d_instantiate(dentry, inode); |
613 | err = v9fs_fid_add(dentry, fid); | |
614 | if (err < 0) | |
615 | goto error; | |
616 | fid = NULL; | |
617 | } else { | |
618 | /* Not in cached mode. No need to populate inode with stat */ | |
619 | inode = v9fs_get_inode(dir->i_sb, S_IFLNK); | |
620 | if (IS_ERR(inode)) { | |
621 | err = PTR_ERR(inode); | |
622 | goto error; | |
623 | } | |
53c06f4e AK |
624 | d_instantiate(dentry, inode); |
625 | } | |
626 | ||
627 | error: | |
628 | if (fid) | |
629 | p9_client_clunk(fid); | |
630 | ||
631 | return err; | |
632 | } | |
633 | ||
634 | /** | |
635 | * v9fs_vfs_link_dotl - create a hardlink for dotl | |
636 | * @old_dentry: dentry for file to link to | |
637 | * @dir: inode destination for new link | |
638 | * @dentry: dentry for link | |
639 | * | |
640 | */ | |
641 | ||
642 | static int | |
643 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, | |
644 | struct dentry *dentry) | |
645 | { | |
646 | int err; | |
53c06f4e | 647 | char *name; |
53c06f4e | 648 | struct dentry *dir_dentry; |
d28c61f0 AK |
649 | struct p9_fid *dfid, *oldfid; |
650 | struct v9fs_session_info *v9ses; | |
53c06f4e AK |
651 | |
652 | P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", | |
653 | dir->i_ino, old_dentry->d_name.name, | |
654 | dentry->d_name.name); | |
655 | ||
656 | v9ses = v9fs_inode2v9ses(dir); | |
657 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
658 | dfid = v9fs_fid_lookup(dir_dentry); | |
659 | if (IS_ERR(dfid)) | |
660 | return PTR_ERR(dfid); | |
661 | ||
662 | oldfid = v9fs_fid_lookup(old_dentry); | |
663 | if (IS_ERR(oldfid)) | |
664 | return PTR_ERR(oldfid); | |
665 | ||
666 | name = (char *) dentry->d_name.name; | |
667 | ||
668 | err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); | |
669 | ||
670 | if (err < 0) { | |
671 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); | |
672 | return err; | |
673 | } | |
674 | ||
d28c61f0 | 675 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
676 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
677 | /* Get the latest stat info from server. */ | |
678 | struct p9_fid *fid; | |
53c06f4e AK |
679 | fid = v9fs_fid_lookup(old_dentry); |
680 | if (IS_ERR(fid)) | |
681 | return PTR_ERR(fid); | |
682 | ||
c06c066a | 683 | v9fs_refresh_inode_dotl(fid, old_dentry->d_inode); |
53c06f4e | 684 | } |
20656a49 | 685 | ihold(old_dentry->d_inode); |
53c06f4e AK |
686 | d_instantiate(dentry, old_dentry->d_inode); |
687 | ||
688 | return err; | |
689 | } | |
690 | ||
691 | /** | |
692 | * v9fs_vfs_mknod_dotl - create a special file | |
693 | * @dir: inode destination for new link | |
694 | * @dentry: dentry for file | |
695 | * @mode: mode for creation | |
696 | * @rdev: device associated with special file | |
697 | * | |
698 | */ | |
699 | static int | |
700 | v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, | |
701 | dev_t rdev) | |
702 | { | |
703 | int err; | |
d28c61f0 | 704 | gid_t gid; |
53c06f4e AK |
705 | char *name; |
706 | mode_t mode; | |
707 | struct v9fs_session_info *v9ses; | |
708 | struct p9_fid *fid = NULL, *dfid = NULL; | |
709 | struct inode *inode; | |
53c06f4e AK |
710 | struct p9_qid qid; |
711 | struct dentry *dir_dentry; | |
712 | struct posix_acl *dacl = NULL, *pacl = NULL; | |
713 | ||
714 | P9_DPRINTK(P9_DEBUG_VFS, | |
715 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
716 | dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); | |
717 | ||
718 | if (!new_valid_dev(rdev)) | |
719 | return -EINVAL; | |
720 | ||
721 | v9ses = v9fs_inode2v9ses(dir); | |
722 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
723 | dfid = v9fs_fid_lookup(dir_dentry); | |
724 | if (IS_ERR(dfid)) { | |
725 | err = PTR_ERR(dfid); | |
726 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
727 | dfid = NULL; | |
728 | goto error; | |
729 | } | |
730 | ||
731 | gid = v9fs_get_fsgid_for_create(dir); | |
732 | mode = omode; | |
733 | /* Update mode based on ACL value */ | |
734 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); | |
735 | if (err) { | |
736 | P9_DPRINTK(P9_DEBUG_VFS, | |
737 | "Failed to get acl values in mknod %d\n", err); | |
738 | goto error; | |
739 | } | |
740 | name = (char *) dentry->d_name.name; | |
741 | ||
742 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); | |
743 | if (err < 0) | |
744 | goto error; | |
745 | ||
d28c61f0 | 746 | v9fs_invalidate_inode_attr(dir); |
53c06f4e AK |
747 | /* instantiate inode and assign the unopened fid to the dentry */ |
748 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
749 | fid = p9_client_walk(dfid, 1, &name, 1); | |
750 | if (IS_ERR(fid)) { | |
751 | err = PTR_ERR(fid); | |
752 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
753 | err); | |
754 | fid = NULL; | |
755 | goto error; | |
756 | } | |
757 | ||
a78ce05d | 758 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
53c06f4e AK |
759 | if (IS_ERR(inode)) { |
760 | err = PTR_ERR(inode); | |
761 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
762 | err); | |
763 | goto error; | |
764 | } | |
53c06f4e AK |
765 | d_instantiate(dentry, inode); |
766 | err = v9fs_fid_add(dentry, fid); | |
767 | if (err < 0) | |
768 | goto error; | |
769 | fid = NULL; | |
770 | } else { | |
771 | /* | |
772 | * Not in cached mode. No need to populate inode with stat. | |
773 | * socket syscall returns a fd, so we need instantiate | |
774 | */ | |
775 | inode = v9fs_get_inode(dir->i_sb, mode); | |
776 | if (IS_ERR(inode)) { | |
777 | err = PTR_ERR(inode); | |
778 | goto error; | |
779 | } | |
53c06f4e AK |
780 | d_instantiate(dentry, inode); |
781 | } | |
782 | /* Now set the ACL based on the default value */ | |
783 | v9fs_set_create_acl(dentry, dacl, pacl); | |
784 | error: | |
785 | if (fid) | |
786 | p9_client_clunk(fid); | |
787 | return err; | |
788 | } | |
789 | ||
53c06f4e AK |
790 | /** |
791 | * v9fs_vfs_follow_link_dotl - follow a symlink path | |
792 | * @dentry: dentry for symlink | |
793 | * @nd: nameidata | |
794 | * | |
795 | */ | |
796 | ||
797 | static void * | |
798 | v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd) | |
799 | { | |
31b6ceac MK |
800 | int retval; |
801 | struct p9_fid *fid; | |
53c06f4e | 802 | char *link = __getname(); |
31b6ceac | 803 | char *target; |
53c06f4e | 804 | |
31b6ceac | 805 | P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name); |
53c06f4e | 806 | |
31b6ceac | 807 | if (!link) { |
53c06f4e | 808 | link = ERR_PTR(-ENOMEM); |
31b6ceac | 809 | goto ndset; |
53c06f4e | 810 | } |
31b6ceac MK |
811 | fid = v9fs_fid_lookup(dentry); |
812 | if (IS_ERR(fid)) { | |
813 | __putname(link); | |
814 | link = ERR_PTR(PTR_ERR(fid)); | |
815 | goto ndset; | |
816 | } | |
817 | retval = p9_client_readlink(fid, &target); | |
818 | if (!retval) { | |
819 | strcpy(link, target); | |
820 | kfree(target); | |
821 | goto ndset; | |
822 | } | |
823 | __putname(link); | |
824 | link = ERR_PTR(retval); | |
825 | ndset: | |
53c06f4e | 826 | nd_set_link(nd, link); |
53c06f4e AK |
827 | return NULL; |
828 | } | |
829 | ||
b3cbea03 AK |
830 | int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode) |
831 | { | |
832 | loff_t i_size; | |
833 | struct p9_stat_dotl *st; | |
834 | struct v9fs_session_info *v9ses; | |
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); | |
840 | ||
841 | spin_lock(&inode->i_lock); | |
842 | /* | |
843 | * We don't want to refresh inode->i_size, | |
844 | * because we may have cached data | |
845 | */ | |
846 | i_size = inode->i_size; | |
847 | v9fs_stat2inode_dotl(st, inode); | |
848 | if (v9ses->cache) | |
849 | inode->i_size = i_size; | |
850 | spin_unlock(&inode->i_lock); | |
851 | kfree(st); | |
852 | return 0; | |
853 | } | |
854 | ||
53c06f4e AK |
855 | const struct inode_operations v9fs_dir_inode_operations_dotl = { |
856 | .create = v9fs_vfs_create_dotl, | |
857 | .lookup = v9fs_vfs_lookup, | |
858 | .link = v9fs_vfs_link_dotl, | |
859 | .symlink = v9fs_vfs_symlink_dotl, | |
860 | .unlink = v9fs_vfs_unlink, | |
861 | .mkdir = v9fs_vfs_mkdir_dotl, | |
862 | .rmdir = v9fs_vfs_rmdir, | |
863 | .mknod = v9fs_vfs_mknod_dotl, | |
864 | .rename = v9fs_vfs_rename, | |
865 | .getattr = v9fs_vfs_getattr_dotl, | |
866 | .setattr = v9fs_vfs_setattr_dotl, | |
867 | .setxattr = generic_setxattr, | |
868 | .getxattr = generic_getxattr, | |
869 | .removexattr = generic_removexattr, | |
870 | .listxattr = v9fs_listxattr, | |
871 | .check_acl = v9fs_check_acl, | |
872 | }; | |
873 | ||
874 | const struct inode_operations v9fs_file_inode_operations_dotl = { | |
875 | .getattr = v9fs_vfs_getattr_dotl, | |
876 | .setattr = v9fs_vfs_setattr_dotl, | |
877 | .setxattr = generic_setxattr, | |
878 | .getxattr = generic_getxattr, | |
879 | .removexattr = generic_removexattr, | |
880 | .listxattr = v9fs_listxattr, | |
881 | .check_acl = v9fs_check_acl, | |
882 | }; | |
883 | ||
884 | const struct inode_operations v9fs_symlink_inode_operations_dotl = { | |
31b6ceac | 885 | .readlink = generic_readlink, |
53c06f4e AK |
886 | .follow_link = v9fs_vfs_follow_link_dotl, |
887 | .put_link = v9fs_vfs_put_link, | |
888 | .getattr = v9fs_vfs_getattr_dotl, | |
889 | .setattr = v9fs_vfs_setattr_dotl, | |
890 | .setxattr = generic_setxattr, | |
891 | .getxattr = generic_getxattr, | |
892 | .removexattr = generic_removexattr, | |
893 | .listxattr = v9fs_listxattr, | |
894 | }; |