Commit | Line | Data |
---|---|---|
2bad8471 EVH |
1 | /* |
2 | * linux/fs/9p/vfs_inode.c | |
3 | * | |
73c592b9 | 4 | * This file contains vfs inode ops for the 9P2000 protocol. |
2bad8471 EVH |
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 | |
42e8c509 EVH |
10 | * it under the terms of the GNU General Public License version 2 |
11 | * as published by the Free Software Foundation. | |
2bad8471 EVH |
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> | |
2bad8471 EVH |
33 | #include <linux/inet.h> |
34 | #include <linux/namei.h> | |
35 | #include <linux/idr.h> | |
e8edc6e0 | 36 | #include <linux/sched.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
bd238fb4 LI |
38 | #include <net/9p/9p.h> |
39 | #include <net/9p/client.h> | |
2bad8471 | 40 | |
2bad8471 | 41 | #include "v9fs.h" |
2bad8471 | 42 | #include "v9fs_vfs.h" |
2bad8471 | 43 | #include "fid.h" |
60e78d2c | 44 | #include "cache.h" |
2bad8471 | 45 | |
754661f1 | 46 | static const struct inode_operations v9fs_dir_inode_operations; |
9b6533c9 SK |
47 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
48 | static const struct inode_operations v9fs_dir_inode_operations_dotl; | |
754661f1 | 49 | static const struct inode_operations v9fs_file_inode_operations; |
9b6533c9 | 50 | static const struct inode_operations v9fs_file_inode_operations_dotl; |
754661f1 | 51 | static const struct inode_operations v9fs_symlink_inode_operations; |
9b6533c9 | 52 | static const struct inode_operations v9fs_symlink_inode_operations_dotl; |
2bad8471 EVH |
53 | |
54 | /** | |
55 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
56 | * @v9ses: v9fs session information | |
57 | * @mode: mode to convert | |
58 | * | |
59 | */ | |
60 | ||
73c592b9 | 61 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
62 | { |
63 | int res; | |
64 | res = mode & 0777; | |
65 | if (S_ISDIR(mode)) | |
bd238fb4 | 66 | res |= P9_DMDIR; |
dd6102fb | 67 | if (v9fs_proto_dotu(v9ses)) { |
2bad8471 | 68 | if (S_ISLNK(mode)) |
bd238fb4 | 69 | res |= P9_DMSYMLINK; |
2bad8471 EVH |
70 | if (v9ses->nodev == 0) { |
71 | if (S_ISSOCK(mode)) | |
bd238fb4 | 72 | res |= P9_DMSOCKET; |
2bad8471 | 73 | if (S_ISFIFO(mode)) |
bd238fb4 | 74 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 75 | if (S_ISBLK(mode)) |
bd238fb4 | 76 | res |= P9_DMDEVICE; |
2bad8471 | 77 | if (S_ISCHR(mode)) |
bd238fb4 | 78 | res |= P9_DMDEVICE; |
2bad8471 EVH |
79 | } |
80 | ||
81 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 82 | res |= P9_DMSETUID; |
2bad8471 | 83 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 84 | res |= P9_DMSETGID; |
d199d652 AL |
85 | if ((mode & S_ISVTX) == S_ISVTX) |
86 | res |= P9_DMSETVTX; | |
bd238fb4 LI |
87 | if ((mode & P9_DMLINK)) |
88 | res |= P9_DMLINK; | |
2bad8471 EVH |
89 | } |
90 | ||
91 | return res; | |
92 | } | |
93 | ||
94 | /** | |
95 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
96 | * @v9ses: v9fs session information | |
97 | * @mode: mode to convert | |
98 | * | |
99 | */ | |
100 | ||
73c592b9 | 101 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
102 | { |
103 | int res; | |
104 | ||
105 | res = mode & 0777; | |
106 | ||
bd238fb4 | 107 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 108 | res |= S_IFDIR; |
dd6102fb | 109 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
2bad8471 | 110 | res |= S_IFLNK; |
dd6102fb | 111 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
112 | && (v9ses->nodev == 0)) |
113 | res |= S_IFSOCK; | |
dd6102fb | 114 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
115 | && (v9ses->nodev == 0)) |
116 | res |= S_IFIFO; | |
dd6102fb | 117 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
2bad8471 EVH |
118 | && (v9ses->nodev == 0)) |
119 | res |= S_IFBLK; | |
120 | else | |
121 | res |= S_IFREG; | |
122 | ||
dd6102fb | 123 | if (v9fs_proto_dotu(v9ses)) { |
bd238fb4 | 124 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
2bad8471 EVH |
125 | res |= S_ISUID; |
126 | ||
bd238fb4 | 127 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
2bad8471 | 128 | res |= S_ISGID; |
d199d652 AL |
129 | |
130 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
131 | res |= S_ISVTX; | |
2bad8471 EVH |
132 | } |
133 | ||
134 | return res; | |
135 | } | |
136 | ||
ee443996 EVH |
137 | /** |
138 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
139 | * @uflags: flags to convert | |
2e4bef41 | 140 | * @extended: if .u extensions are active |
ee443996 EVH |
141 | */ |
142 | ||
2e4bef41 | 143 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
144 | { |
145 | int ret; | |
146 | ||
147 | ret = 0; | |
148 | switch (uflags&3) { | |
149 | default: | |
150 | case O_RDONLY: | |
bd238fb4 | 151 | ret = P9_OREAD; |
6a3124a3 LI |
152 | break; |
153 | ||
154 | case O_WRONLY: | |
bd238fb4 | 155 | ret = P9_OWRITE; |
6a3124a3 LI |
156 | break; |
157 | ||
158 | case O_RDWR: | |
bd238fb4 | 159 | ret = P9_ORDWR; |
6a3124a3 LI |
160 | break; |
161 | } | |
162 | ||
6a3124a3 | 163 | if (uflags & O_TRUNC) |
bd238fb4 | 164 | ret |= P9_OTRUNC; |
6a3124a3 | 165 | |
2e4bef41 EVH |
166 | if (extended) { |
167 | if (uflags & O_EXCL) | |
168 | ret |= P9_OEXCL; | |
169 | ||
170 | if (uflags & O_APPEND) | |
171 | ret |= P9_OAPPEND; | |
172 | } | |
6a3124a3 LI |
173 | |
174 | return ret; | |
175 | } | |
176 | ||
2bad8471 | 177 | /** |
531b1094 | 178 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
531b1094 | 179 | * @wstat: structure to initialize |
2bad8471 EVH |
180 | * |
181 | */ | |
182 | ||
7a4439c4 | 183 | void |
bd238fb4 | 184 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 185 | { |
531b1094 LI |
186 | wstat->type = ~0; |
187 | wstat->dev = ~0; | |
188 | wstat->qid.type = ~0; | |
189 | wstat->qid.version = ~0; | |
190 | *((long long *)&wstat->qid.path) = ~0; | |
191 | wstat->mode = ~0; | |
192 | wstat->atime = ~0; | |
193 | wstat->mtime = ~0; | |
194 | wstat->length = ~0; | |
195 | wstat->name = NULL; | |
196 | wstat->uid = NULL; | |
197 | wstat->gid = NULL; | |
198 | wstat->muid = NULL; | |
199 | wstat->n_uid = ~0; | |
200 | wstat->n_gid = ~0; | |
201 | wstat->n_muid = ~0; | |
202 | wstat->extension = NULL; | |
2bad8471 EVH |
203 | } |
204 | ||
60e78d2c AK |
205 | #ifdef CONFIG_9P_FSCACHE |
206 | /** | |
207 | * v9fs_alloc_inode - helper function to allocate an inode | |
208 | * This callback is executed before setting up the inode so that we | |
209 | * can associate a vcookie with each inode. | |
210 | * | |
211 | */ | |
212 | ||
213 | struct inode *v9fs_alloc_inode(struct super_block *sb) | |
214 | { | |
215 | struct v9fs_cookie *vcookie; | |
216 | vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, | |
217 | GFP_KERNEL); | |
218 | if (!vcookie) | |
219 | return NULL; | |
220 | ||
221 | vcookie->fscache = NULL; | |
222 | vcookie->qid = NULL; | |
223 | spin_lock_init(&vcookie->lock); | |
224 | return &vcookie->inode; | |
225 | } | |
226 | ||
227 | /** | |
228 | * v9fs_destroy_inode - destroy an inode | |
229 | * | |
230 | */ | |
231 | ||
232 | void v9fs_destroy_inode(struct inode *inode) | |
233 | { | |
234 | kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); | |
235 | } | |
236 | #endif | |
237 | ||
09d34ee5 EVH |
238 | /** |
239 | * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a | |
240 | * new file system object. This checks the S_ISGID to determine the owning | |
241 | * group of the new file system object. | |
242 | */ | |
243 | ||
244 | static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) | |
245 | { | |
246 | BUG_ON(dir_inode == NULL); | |
247 | ||
248 | if (dir_inode->i_mode & S_ISGID) { | |
249 | /* set_gid bit is set.*/ | |
250 | return dir_inode->i_gid; | |
251 | } | |
252 | return current_fsgid(); | |
253 | } | |
254 | ||
255 | /** | |
256 | * v9fs_dentry_from_dir_inode - helper function to get the dentry from | |
257 | * dir inode. | |
258 | * | |
259 | */ | |
260 | ||
261 | struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) | |
262 | { | |
263 | struct dentry *dentry; | |
264 | ||
265 | spin_lock(&dcache_lock); | |
266 | /* Directory should have only one entry. */ | |
267 | BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); | |
268 | dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); | |
269 | spin_unlock(&dcache_lock); | |
270 | return dentry; | |
271 | } | |
272 | ||
2bad8471 EVH |
273 | /** |
274 | * v9fs_get_inode - helper function to setup an inode | |
275 | * @sb: superblock | |
276 | * @mode: mode to setup inode with | |
277 | * | |
278 | */ | |
279 | ||
280 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) | |
281 | { | |
2bb54115 | 282 | int err; |
6a3124a3 | 283 | struct inode *inode; |
b501611a | 284 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
2bad8471 | 285 | |
bd238fb4 | 286 | P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
2bad8471 EVH |
287 | |
288 | inode = new_inode(sb); | |
2bb54115 AK |
289 | if (!inode) { |
290 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); | |
48559b4c | 291 | return ERR_PTR(-ENOMEM); |
2bb54115 AK |
292 | } |
293 | ||
217f206d | 294 | inode_init_owner(inode, NULL, mode); |
2bb54115 AK |
295 | inode->i_blocks = 0; |
296 | inode->i_rdev = 0; | |
297 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
298 | inode->i_mapping->a_ops = &v9fs_addr_operations; | |
299 | ||
300 | switch (mode & S_IFMT) { | |
301 | case S_IFIFO: | |
302 | case S_IFBLK: | |
303 | case S_IFCHR: | |
304 | case S_IFSOCK: | |
4b43516a MK |
305 | if (v9fs_proto_dotl(v9ses)) { |
306 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
307 | inode->i_fop = &v9fs_file_operations_dotl; | |
308 | } else if (v9fs_proto_dotu(v9ses)) { | |
309 | inode->i_op = &v9fs_file_inode_operations; | |
310 | inode->i_fop = &v9fs_file_operations; | |
311 | } else { | |
bd238fb4 | 312 | P9_DPRINTK(P9_DEBUG_ERROR, |
2bb54115 AK |
313 | "special files without extended mode\n"); |
314 | err = -EINVAL; | |
315 | goto error; | |
2bad8471 | 316 | } |
2bb54115 AK |
317 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
318 | break; | |
319 | case S_IFREG: | |
9b6533c9 SK |
320 | if (v9fs_proto_dotl(v9ses)) { |
321 | inode->i_op = &v9fs_file_inode_operations_dotl; | |
322 | inode->i_fop = &v9fs_file_operations_dotl; | |
323 | } else { | |
324 | inode->i_op = &v9fs_file_inode_operations; | |
325 | inode->i_fop = &v9fs_file_operations; | |
326 | } | |
327 | ||
2bb54115 | 328 | break; |
9b6533c9 | 329 | |
2bb54115 | 330 | case S_IFLNK: |
9b6533c9 SK |
331 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
332 | P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " | |
333 | "legacy protocol.\n"); | |
2bb54115 AK |
334 | err = -EINVAL; |
335 | goto error; | |
336 | } | |
9b6533c9 SK |
337 | |
338 | if (v9fs_proto_dotl(v9ses)) | |
339 | inode->i_op = &v9fs_symlink_inode_operations_dotl; | |
340 | else | |
341 | inode->i_op = &v9fs_symlink_inode_operations; | |
342 | ||
2bb54115 AK |
343 | break; |
344 | case S_IFDIR: | |
345 | inc_nlink(inode); | |
9b6533c9 SK |
346 | if (v9fs_proto_dotl(v9ses)) |
347 | inode->i_op = &v9fs_dir_inode_operations_dotl; | |
348 | else if (v9fs_proto_dotu(v9ses)) | |
349 | inode->i_op = &v9fs_dir_inode_operations_dotu; | |
2bb54115 AK |
350 | else |
351 | inode->i_op = &v9fs_dir_inode_operations; | |
9b6533c9 SK |
352 | |
353 | if (v9fs_proto_dotl(v9ses)) | |
354 | inode->i_fop = &v9fs_dir_operations_dotl; | |
355 | else | |
356 | inode->i_fop = &v9fs_dir_operations; | |
357 | ||
2bb54115 AK |
358 | break; |
359 | default: | |
360 | P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", | |
361 | mode, mode & S_IFMT); | |
362 | err = -EINVAL; | |
363 | goto error; | |
2bad8471 | 364 | } |
2bb54115 | 365 | |
2bad8471 | 366 | return inode; |
2bb54115 AK |
367 | |
368 | error: | |
369 | iput(inode); | |
370 | return ERR_PTR(err); | |
2bad8471 EVH |
371 | } |
372 | ||
bd238fb4 | 373 | /* |
6a3124a3 LI |
374 | static struct v9fs_fid* |
375 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) | |
376 | { | |
377 | int err; | |
736c4b85 | 378 | int nfid; |
6a3124a3 LI |
379 | struct v9fs_fid *ret; |
380 | struct v9fs_fcall *fcall; | |
381 | ||
382 | nfid = v9fs_get_idpool(&v9ses->fidpool); | |
383 | if (nfid < 0) { | |
0b8dd177 | 384 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 385 | return ERR_PTR(-ENOSPC); |
0b8dd177 LI |
386 | } |
387 | ||
6a3124a3 LI |
388 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
389 | &fcall); | |
390 | ||
391 | if (err < 0) { | |
41e5a6ac LI |
392 | if (fcall && fcall->id == RWALK) |
393 | goto clunk_fid; | |
394 | ||
6a3124a3 LI |
395 | PRINT_FCALL_ERROR("walk error", fcall); |
396 | v9fs_put_idpool(nfid, &v9ses->fidpool); | |
397 | goto error; | |
0b8dd177 | 398 | } |
6a3124a3 | 399 | |
3cf6429a LI |
400 | kfree(fcall); |
401 | fcall = NULL; | |
6a3124a3 LI |
402 | ret = v9fs_fid_create(v9ses, nfid); |
403 | if (!ret) { | |
404 | err = -ENOMEM; | |
405 | goto clunk_fid; | |
406 | } | |
0b8dd177 | 407 | |
6a3124a3 LI |
408 | err = v9fs_fid_insert(ret, dentry); |
409 | if (err < 0) { | |
410 | v9fs_fid_destroy(ret); | |
411 | goto clunk_fid; | |
0b8dd177 | 412 | } |
2bad8471 | 413 | |
6a3124a3 | 414 | return ret; |
2bad8471 | 415 | |
6a3124a3 LI |
416 | clunk_fid: |
417 | v9fs_t_clunk(v9ses, nfid); | |
2bad8471 | 418 | |
6a3124a3 LI |
419 | error: |
420 | kfree(fcall); | |
421 | return ERR_PTR(err); | |
422 | } | |
bd238fb4 | 423 | */ |
2bad8471 | 424 | |
60e78d2c AK |
425 | |
426 | /** | |
427 | * v9fs_clear_inode - release an inode | |
428 | * @inode: inode to release | |
429 | * | |
430 | */ | |
431 | void v9fs_clear_inode(struct inode *inode) | |
432 | { | |
433 | filemap_fdatawrite(inode->i_mapping); | |
434 | ||
435 | #ifdef CONFIG_9P_FSCACHE | |
436 | v9fs_cache_inode_put_cookie(inode); | |
437 | #endif | |
438 | } | |
439 | ||
5174fdab | 440 | static struct inode * |
f0853122 | 441 | v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
6a3124a3 LI |
442 | struct super_block *sb) |
443 | { | |
444 | int err, umode; | |
f0853122 | 445 | struct inode *ret = NULL; |
51a87c55 | 446 | struct p9_wstat *st; |
531b1094 | 447 | |
bd238fb4 | 448 | st = p9_client_stat(fid); |
02bc3567 AK |
449 | if (IS_ERR(st)) |
450 | return ERR_CAST(st); | |
2bad8471 | 451 | |
bd238fb4 | 452 | umode = p9mode2unixmode(v9ses, st->mode); |
6a3124a3 LI |
453 | ret = v9fs_get_inode(sb, umode); |
454 | if (IS_ERR(ret)) { | |
455 | err = PTR_ERR(ret); | |
6a3124a3 LI |
456 | goto error; |
457 | } | |
2bad8471 | 458 | |
bd238fb4 LI |
459 | v9fs_stat2inode(st, ret, sb); |
460 | ret->i_ino = v9fs_qid2ino(&st->qid); | |
60e78d2c AK |
461 | |
462 | #ifdef CONFIG_9P_FSCACHE | |
463 | v9fs_vcookie_set_qid(ret, &st->qid); | |
464 | v9fs_cache_inode_get_cookie(ret); | |
465 | #endif | |
02bc3567 | 466 | p9stat_free(st); |
bd238fb4 | 467 | kfree(st); |
6a3124a3 | 468 | return ret; |
6a3124a3 | 469 | error: |
02bc3567 | 470 | p9stat_free(st); |
bd238fb4 | 471 | kfree(st); |
6a3124a3 | 472 | return ERR_PTR(err); |
2bad8471 EVH |
473 | } |
474 | ||
f0853122 SK |
475 | static struct inode * |
476 | v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, | |
477 | struct super_block *sb) | |
478 | { | |
479 | struct inode *ret = NULL; | |
480 | int err; | |
481 | struct p9_stat_dotl *st; | |
482 | ||
483 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); | |
484 | if (IS_ERR(st)) | |
485 | return ERR_CAST(st); | |
486 | ||
487 | ret = v9fs_get_inode(sb, st->st_mode); | |
488 | if (IS_ERR(ret)) { | |
489 | err = PTR_ERR(ret); | |
490 | goto error; | |
491 | } | |
492 | ||
493 | v9fs_stat2inode_dotl(st, ret); | |
494 | ret->i_ino = v9fs_qid2ino(&st->qid); | |
495 | #ifdef CONFIG_9P_FSCACHE | |
496 | v9fs_vcookie_set_qid(ret, &st->qid); | |
497 | v9fs_cache_inode_get_cookie(ret); | |
498 | #endif | |
499 | kfree(st); | |
500 | return ret; | |
501 | error: | |
502 | kfree(st); | |
503 | return ERR_PTR(err); | |
504 | } | |
505 | ||
506 | /** | |
507 | * v9fs_inode_from_fid - Helper routine to populate an inode by | |
508 | * issuing a attribute request | |
509 | * @v9ses: session information | |
510 | * @fid: fid to issue attribute request for | |
511 | * @sb: superblock on which to create inode | |
512 | * | |
513 | */ | |
514 | static inline struct inode * | |
515 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, | |
516 | struct super_block *sb) | |
517 | { | |
518 | if (v9fs_proto_dotl(v9ses)) | |
519 | return v9fs_inode_dotl(v9ses, fid, sb); | |
520 | else | |
521 | return v9fs_inode(v9ses, fid, sb); | |
522 | } | |
523 | ||
2bad8471 EVH |
524 | /** |
525 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 EVH |
526 | * @dir: directory inode that is being deleted |
527 | * @file: dentry that is being deleted | |
528 | * @rmdir: removing a directory | |
2bad8471 EVH |
529 | * |
530 | */ | |
531 | ||
532 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) | |
533 | { | |
d994f405 | 534 | int retval; |
bd238fb4 | 535 | struct inode *file_inode; |
bd238fb4 | 536 | struct p9_fid *v9fid; |
2bad8471 | 537 | |
bd238fb4 | 538 | P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, |
2bad8471 EVH |
539 | rmdir); |
540 | ||
541 | file_inode = file->d_inode; | |
c959df9f | 542 | v9fid = v9fs_fid_clone(file); |
ba17674f | 543 | if (IS_ERR(v9fid)) |
da977b2c | 544 | return PTR_ERR(v9fid); |
2bad8471 | 545 | |
d994f405 AK |
546 | retval = p9_client_remove(v9fid); |
547 | if (!retval) | |
548 | drop_nlink(file_inode); | |
549 | return retval; | |
2bad8471 EVH |
550 | } |
551 | ||
6a3124a3 LI |
552 | static int |
553 | v9fs_open_created(struct inode *inode, struct file *file) | |
554 | { | |
555 | return 0; | |
556 | } | |
557 | ||
bd238fb4 | 558 | |
2bad8471 | 559 | /** |
bd238fb4 | 560 | * v9fs_create - Create a file |
ee443996 EVH |
561 | * @v9ses: session information |
562 | * @dir: directory that dentry is being created in | |
bd238fb4 | 563 | * @dentry: dentry that is being created |
0e15597e | 564 | * @extension: 9p2000.u extension string to support devices, etc. |
bd238fb4 LI |
565 | * @perm: create permissions |
566 | * @mode: open mode | |
2bad8471 EVH |
567 | * |
568 | */ | |
bd238fb4 LI |
569 | static struct p9_fid * |
570 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
571 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 572 | { |
6a3124a3 | 573 | int err; |
bd238fb4 LI |
574 | char *name; |
575 | struct p9_fid *dfid, *ofid, *fid; | |
6a3124a3 | 576 | struct inode *inode; |
6a3124a3 | 577 | |
51a87c55 EVH |
578 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
579 | ||
bd238fb4 LI |
580 | err = 0; |
581 | ofid = NULL; | |
582 | fid = NULL; | |
583 | name = (char *) dentry->d_name.name; | |
6d27e64d | 584 | dfid = v9fs_fid_lookup(dentry->d_parent); |
ba17674f | 585 | if (IS_ERR(dfid)) { |
da977b2c | 586 | err = PTR_ERR(dfid); |
6d27e64d VJ |
587 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
588 | return ERR_PTR(err); | |
da977b2c | 589 | } |
6a3124a3 | 590 | |
bd238fb4 LI |
591 | /* clone a fid to use for creation */ |
592 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
593 | if (IS_ERR(ofid)) { | |
594 | err = PTR_ERR(ofid); | |
51a87c55 | 595 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
6d27e64d | 596 | return ERR_PTR(err); |
bd238fb4 | 597 | } |
6a3124a3 | 598 | |
bd238fb4 | 599 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 EVH |
600 | if (err < 0) { |
601 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); | |
bd238fb4 | 602 | goto error; |
51a87c55 | 603 | } |
6a3124a3 | 604 | |
bd238fb4 | 605 | /* now walk from the parent so we can get unopened fid */ |
6d27e64d | 606 | fid = p9_client_walk(dfid, 1, &name, 1); |
bd238fb4 LI |
607 | if (IS_ERR(fid)) { |
608 | err = PTR_ERR(fid); | |
51a87c55 | 609 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
bd238fb4 | 610 | fid = NULL; |
6a3124a3 | 611 | goto error; |
6d27e64d | 612 | } |
6a3124a3 | 613 | |
bd238fb4 LI |
614 | /* instantiate inode and assign the unopened fid to the dentry */ |
615 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
6a3124a3 LI |
616 | if (IS_ERR(inode)) { |
617 | err = PTR_ERR(inode); | |
51a87c55 | 618 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
6a3124a3 LI |
619 | goto error; |
620 | } | |
621 | ||
ba17674f | 622 | if (v9ses->cache) |
e03abc0c EVH |
623 | dentry->d_op = &v9fs_cached_dentry_operations; |
624 | else | |
625 | dentry->d_op = &v9fs_dentry_operations; | |
bd238fb4 | 626 | |
6a3124a3 | 627 | d_instantiate(dentry, inode); |
50fb6d2b AK |
628 | err = v9fs_fid_add(dentry, fid); |
629 | if (err < 0) | |
630 | goto error; | |
631 | ||
bd238fb4 | 632 | return ofid; |
6a3124a3 | 633 | |
bd238fb4 | 634 | error: |
bd238fb4 LI |
635 | if (ofid) |
636 | p9_client_clunk(ofid); | |
637 | ||
638 | if (fid) | |
639 | p9_client_clunk(fid); | |
640 | ||
641 | return ERR_PTR(err); | |
642 | } | |
643 | ||
5643135a VJJ |
644 | /** |
645 | * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. | |
646 | * @dir: directory inode that is being created | |
647 | * @dentry: dentry that is being deleted | |
648 | * @mode: create permissions | |
649 | * @nd: path information | |
650 | * | |
651 | */ | |
652 | ||
653 | static int | |
654 | v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, | |
655 | struct nameidata *nd) | |
656 | { | |
657 | int err = 0; | |
658 | char *name = NULL; | |
659 | gid_t gid; | |
660 | int flags; | |
661 | struct v9fs_session_info *v9ses; | |
662 | struct p9_fid *fid = NULL; | |
663 | struct p9_fid *dfid, *ofid; | |
664 | struct file *filp; | |
665 | struct p9_qid qid; | |
666 | struct inode *inode; | |
667 | ||
668 | v9ses = v9fs_inode2v9ses(dir); | |
669 | if (nd && nd->flags & LOOKUP_OPEN) | |
670 | flags = nd->intent.open.flags - 1; | |
671 | else | |
672 | flags = O_RDWR; | |
673 | ||
674 | name = (char *) dentry->d_name.name; | |
675 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " | |
676 | "mode:0x%x\n", name, flags, mode); | |
677 | ||
678 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
679 | if (IS_ERR(dfid)) { | |
680 | err = PTR_ERR(dfid); | |
681 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
682 | return err; | |
683 | } | |
684 | ||
685 | /* clone a fid to use for creation */ | |
686 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
687 | if (IS_ERR(ofid)) { | |
688 | err = PTR_ERR(ofid); | |
689 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); | |
690 | return err; | |
691 | } | |
692 | ||
693 | gid = v9fs_get_fsgid_for_create(dir); | |
694 | err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); | |
695 | if (err < 0) { | |
696 | P9_DPRINTK(P9_DEBUG_VFS, | |
697 | "p9_client_open_dotl failed in creat %d\n", | |
698 | err); | |
699 | goto error; | |
700 | } | |
701 | ||
702 | /* No need to populate the inode if we are not opening the file AND | |
703 | * not in cached mode. | |
704 | */ | |
705 | if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) { | |
706 | /* Not in cached mode. No need to populate inode with stat */ | |
707 | dentry->d_op = &v9fs_dentry_operations; | |
708 | p9_client_clunk(ofid); | |
709 | d_instantiate(dentry, NULL); | |
710 | return 0; | |
711 | } | |
712 | ||
713 | /* Now walk from the parent so we can get an unopened fid. */ | |
714 | fid = p9_client_walk(dfid, 1, &name, 1); | |
715 | if (IS_ERR(fid)) { | |
716 | err = PTR_ERR(fid); | |
717 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); | |
718 | fid = NULL; | |
719 | goto error; | |
720 | } | |
721 | ||
722 | /* instantiate inode and assign the unopened fid to dentry */ | |
723 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
724 | if (IS_ERR(inode)) { | |
725 | err = PTR_ERR(inode); | |
726 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); | |
727 | goto error; | |
728 | } | |
729 | dentry->d_op = &v9fs_cached_dentry_operations; | |
730 | d_instantiate(dentry, inode); | |
731 | err = v9fs_fid_add(dentry, fid); | |
732 | if (err < 0) | |
733 | goto error; | |
734 | ||
735 | /* if we are opening a file, assign the open fid to the file */ | |
736 | if (nd && nd->flags & LOOKUP_OPEN) { | |
737 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); | |
738 | if (IS_ERR(filp)) { | |
739 | p9_client_clunk(ofid); | |
740 | return PTR_ERR(filp); | |
741 | } | |
742 | filp->private_data = ofid; | |
743 | } else | |
744 | p9_client_clunk(ofid); | |
745 | ||
746 | return 0; | |
747 | ||
748 | error: | |
749 | if (ofid) | |
750 | p9_client_clunk(ofid); | |
751 | if (fid) | |
752 | p9_client_clunk(fid); | |
753 | return err; | |
754 | } | |
755 | ||
bd238fb4 LI |
756 | /** |
757 | * v9fs_vfs_create - VFS hook to create files | |
ee443996 | 758 | * @dir: directory inode that is being created |
bd238fb4 LI |
759 | * @dentry: dentry that is being deleted |
760 | * @mode: create permissions | |
761 | * @nd: path information | |
762 | * | |
763 | */ | |
6a3124a3 | 764 | |
bd238fb4 LI |
765 | static int |
766 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, | |
767 | struct nameidata *nd) | |
768 | { | |
769 | int err; | |
770 | u32 perm; | |
771 | int flags; | |
772 | struct v9fs_session_info *v9ses; | |
773 | struct p9_fid *fid; | |
774 | struct file *filp; | |
775 | ||
776 | err = 0; | |
777 | fid = NULL; | |
778 | v9ses = v9fs_inode2v9ses(dir); | |
779 | perm = unixmode2p9mode(v9ses, mode); | |
780 | if (nd && nd->flags & LOOKUP_OPEN) | |
781 | flags = nd->intent.open.flags - 1; | |
782 | else | |
783 | flags = O_RDWR; | |
784 | ||
785 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
dd6102fb SK |
786 | v9fs_uflags2omode(flags, |
787 | v9fs_proto_dotu(v9ses))); | |
bd238fb4 LI |
788 | if (IS_ERR(fid)) { |
789 | err = PTR_ERR(fid); | |
790 | fid = NULL; | |
791 | goto error; | |
792 | } | |
793 | ||
794 | /* if we are opening a file, assign the open fid to the file */ | |
795 | if (nd && nd->flags & LOOKUP_OPEN) { | |
6a3124a3 LI |
796 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
797 | if (IS_ERR(filp)) { | |
bd238fb4 LI |
798 | err = PTR_ERR(filp); |
799 | goto error; | |
6a3124a3 LI |
800 | } |
801 | ||
bd238fb4 LI |
802 | filp->private_data = fid; |
803 | } else | |
804 | p9_client_clunk(fid); | |
6a3124a3 LI |
805 | |
806 | return 0; | |
807 | ||
808 | error: | |
bd238fb4 LI |
809 | if (fid) |
810 | p9_client_clunk(fid); | |
6a3124a3 | 811 | |
6a3124a3 | 812 | return err; |
2bad8471 EVH |
813 | } |
814 | ||
815 | /** | |
816 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
ee443996 | 817 | * @dir: inode that is being unlinked |
2bad8471 EVH |
818 | * @dentry: dentry that is being unlinked |
819 | * @mode: mode for new directory | |
820 | * | |
821 | */ | |
822 | ||
6a3124a3 | 823 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
2bad8471 | 824 | { |
6a3124a3 | 825 | int err; |
bd238fb4 | 826 | u32 perm; |
6a3124a3 | 827 | struct v9fs_session_info *v9ses; |
bd238fb4 | 828 | struct p9_fid *fid; |
6a3124a3 | 829 | |
bd238fb4 LI |
830 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
831 | err = 0; | |
6a3124a3 | 832 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 833 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
834 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
835 | if (IS_ERR(fid)) { | |
836 | err = PTR_ERR(fid); | |
837 | fid = NULL; | |
6a3124a3 LI |
838 | } |
839 | ||
bd238fb4 LI |
840 | if (fid) |
841 | p9_client_clunk(fid); | |
6a3124a3 | 842 | |
6a3124a3 | 843 | return err; |
2bad8471 EVH |
844 | } |
845 | ||
01a622bd MK |
846 | |
847 | /** | |
848 | * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory | |
849 | * @dir: inode that is being unlinked | |
850 | * @dentry: dentry that is being unlinked | |
851 | * @mode: mode for new directory | |
852 | * | |
853 | */ | |
854 | ||
855 | static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, | |
856 | int mode) | |
857 | { | |
858 | int err; | |
859 | struct v9fs_session_info *v9ses; | |
860 | struct p9_fid *fid = NULL, *dfid = NULL; | |
861 | gid_t gid; | |
862 | char *name; | |
863 | struct inode *inode; | |
864 | struct p9_qid qid; | |
865 | struct dentry *dir_dentry; | |
866 | ||
867 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); | |
868 | err = 0; | |
869 | v9ses = v9fs_inode2v9ses(dir); | |
870 | ||
871 | mode |= S_IFDIR; | |
872 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
873 | dfid = v9fs_fid_lookup(dir_dentry); | |
874 | if (IS_ERR(dfid)) { | |
875 | err = PTR_ERR(dfid); | |
876 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
877 | dfid = NULL; | |
878 | goto error; | |
879 | } | |
880 | ||
881 | gid = v9fs_get_fsgid_for_create(dir); | |
882 | if (gid < 0) { | |
883 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); | |
884 | goto error; | |
885 | } | |
886 | ||
887 | name = (char *) dentry->d_name.name; | |
888 | err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); | |
889 | if (err < 0) | |
890 | goto error; | |
891 | ||
892 | /* instantiate inode and assign the unopened fid to the dentry */ | |
893 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
894 | fid = p9_client_walk(dfid, 1, &name, 1); | |
895 | if (IS_ERR(fid)) { | |
896 | err = PTR_ERR(fid); | |
897 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
898 | err); | |
899 | fid = NULL; | |
900 | goto error; | |
901 | } | |
902 | ||
903 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
904 | if (IS_ERR(inode)) { | |
905 | err = PTR_ERR(inode); | |
906 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
907 | err); | |
908 | goto error; | |
909 | } | |
910 | dentry->d_op = &v9fs_cached_dentry_operations; | |
911 | d_instantiate(dentry, inode); | |
912 | err = v9fs_fid_add(dentry, fid); | |
913 | if (err < 0) | |
914 | goto error; | |
915 | fid = NULL; | |
916 | } | |
917 | error: | |
918 | if (fid) | |
919 | p9_client_clunk(fid); | |
920 | return err; | |
921 | } | |
922 | ||
2bad8471 EVH |
923 | /** |
924 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
925 | * @dir: inode that is being walked from | |
926 | * @dentry: dentry that is being walked to? | |
927 | * @nameidata: path data | |
928 | * | |
929 | */ | |
930 | ||
931 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, | |
932 | struct nameidata *nameidata) | |
933 | { | |
934 | struct super_block *sb; | |
935 | struct v9fs_session_info *v9ses; | |
bd238fb4 | 936 | struct p9_fid *dfid, *fid; |
2bad8471 | 937 | struct inode *inode; |
bd238fb4 | 938 | char *name; |
2bad8471 EVH |
939 | int result = 0; |
940 | ||
bd238fb4 | 941 | P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", |
731805b4 | 942 | dir, dentry->d_name.name, dentry, nameidata); |
2bad8471 | 943 | |
11e9b49b SK |
944 | if (dentry->d_name.len > NAME_MAX) |
945 | return ERR_PTR(-ENAMETOOLONG); | |
946 | ||
2bad8471 EVH |
947 | sb = dir->i_sb; |
948 | v9ses = v9fs_inode2v9ses(dir); | |
bd238fb4 LI |
949 | dfid = v9fs_fid_lookup(dentry->d_parent); |
950 | if (IS_ERR(dfid)) | |
e231c2ee | 951 | return ERR_CAST(dfid); |
bd238fb4 LI |
952 | |
953 | name = (char *) dentry->d_name.name; | |
954 | fid = p9_client_walk(dfid, 1, &name, 1); | |
955 | if (IS_ERR(fid)) { | |
956 | result = PTR_ERR(fid); | |
2bad8471 | 957 | if (result == -ENOENT) { |
85e0df24 AK |
958 | inode = NULL; |
959 | goto inst_out; | |
2bad8471 | 960 | } |
2bad8471 | 961 | |
bd238fb4 | 962 | return ERR_PTR(result); |
2bad8471 EVH |
963 | } |
964 | ||
bd238fb4 LI |
965 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
966 | if (IS_ERR(inode)) { | |
967 | result = PTR_ERR(inode); | |
968 | inode = NULL; | |
969 | goto error; | |
2bad8471 EVH |
970 | } |
971 | ||
bd238fb4 | 972 | result = v9fs_fid_add(dentry, fid); |
6a3124a3 | 973 | if (result < 0) |
bd238fb4 | 974 | goto error; |
6a3124a3 | 975 | |
85e0df24 AK |
976 | inst_out: |
977 | if (v9ses->cache) | |
e03abc0c EVH |
978 | dentry->d_op = &v9fs_cached_dentry_operations; |
979 | else | |
980 | dentry->d_op = &v9fs_dentry_operations; | |
2bad8471 EVH |
981 | |
982 | d_add(dentry, inode); | |
2bad8471 EVH |
983 | return NULL; |
984 | ||
bd238fb4 | 985 | error: |
62aa528e | 986 | p9_client_clunk(fid); |
da977b2c | 987 | |
2bad8471 EVH |
988 | return ERR_PTR(result); |
989 | } | |
990 | ||
991 | /** | |
992 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
993 | * @i: inode that is being unlinked | |
73c592b9 | 994 | * @d: dentry that is being unlinked |
2bad8471 EVH |
995 | * |
996 | */ | |
997 | ||
998 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) | |
999 | { | |
1000 | return v9fs_remove(i, d, 0); | |
1001 | } | |
1002 | ||
1003 | /** | |
1004 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
1005 | * @i: inode that is being unlinked | |
73c592b9 | 1006 | * @d: dentry that is being unlinked |
2bad8471 EVH |
1007 | * |
1008 | */ | |
1009 | ||
1010 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) | |
1011 | { | |
1012 | return v9fs_remove(i, d, 1); | |
1013 | } | |
1014 | ||
1015 | /** | |
1016 | * v9fs_vfs_rename - VFS hook to rename an inode | |
1017 | * @old_dir: old dir inode | |
1018 | * @old_dentry: old dentry | |
1019 | * @new_dir: new dir inode | |
1020 | * @new_dentry: new dentry | |
1021 | * | |
1022 | */ | |
1023 | ||
1024 | static int | |
1025 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1026 | struct inode *new_dir, struct dentry *new_dentry) | |
1027 | { | |
bd238fb4 LI |
1028 | struct inode *old_inode; |
1029 | struct v9fs_session_info *v9ses; | |
1030 | struct p9_fid *oldfid; | |
1031 | struct p9_fid *olddirfid; | |
1032 | struct p9_fid *newdirfid; | |
1033 | struct p9_wstat wstat; | |
1034 | int retval; | |
2bad8471 | 1035 | |
bd238fb4 LI |
1036 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
1037 | retval = 0; | |
1038 | old_inode = old_dentry->d_inode; | |
1039 | v9ses = v9fs_inode2v9ses(old_inode); | |
1040 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 1041 | if (IS_ERR(oldfid)) |
da977b2c EVH |
1042 | return PTR_ERR(oldfid); |
1043 | ||
1044 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); | |
ba17674f | 1045 | if (IS_ERR(olddirfid)) { |
da977b2c | 1046 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 1047 | goto done; |
da977b2c EVH |
1048 | } |
1049 | ||
1050 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); | |
ba17674f | 1051 | if (IS_ERR(newdirfid)) { |
da977b2c | 1052 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 1053 | goto clunk_olddir; |
2bad8471 EVH |
1054 | } |
1055 | ||
4681dbda SK |
1056 | if (v9fs_proto_dotl(v9ses)) { |
1057 | retval = p9_client_rename(oldfid, newdirfid, | |
1058 | (char *) new_dentry->d_name.name); | |
1059 | if (retval != -ENOSYS) | |
1060 | goto clunk_newdir; | |
1061 | } | |
1062 | ||
2bad8471 EVH |
1063 | /* 9P can only handle file rename in the same directory */ |
1064 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { | |
bd238fb4 LI |
1065 | P9_DPRINTK(P9_DEBUG_ERROR, |
1066 | "old dir and new dir are different\n"); | |
621997cd | 1067 | retval = -EXDEV; |
bd238fb4 | 1068 | goto clunk_newdir; |
2bad8471 EVH |
1069 | } |
1070 | ||
531b1094 | 1071 | v9fs_blank_wstat(&wstat); |
ba17674f | 1072 | wstat.muid = v9ses->uname; |
531b1094 | 1073 | wstat.name = (char *) new_dentry->d_name.name; |
bd238fb4 | 1074 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 1075 | |
bd238fb4 | 1076 | clunk_newdir: |
22150c4f | 1077 | p9_client_clunk(newdirfid); |
2bad8471 | 1078 | |
bd238fb4 | 1079 | clunk_olddir: |
22150c4f | 1080 | p9_client_clunk(olddirfid); |
da977b2c | 1081 | |
bd238fb4 | 1082 | done: |
2bad8471 EVH |
1083 | return retval; |
1084 | } | |
1085 | ||
1086 | /** | |
943ffb58 | 1087 | * v9fs_vfs_getattr - retrieve file metadata |
ee443996 EVH |
1088 | * @mnt: mount information |
1089 | * @dentry: file to get attributes on | |
1090 | * @stat: metadata structure to populate | |
2bad8471 EVH |
1091 | * |
1092 | */ | |
1093 | ||
1094 | static int | |
1095 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1096 | struct kstat *stat) | |
1097 | { | |
bd238fb4 LI |
1098 | int err; |
1099 | struct v9fs_session_info *v9ses; | |
1100 | struct p9_fid *fid; | |
51a87c55 | 1101 | struct p9_wstat *st; |
bd238fb4 LI |
1102 | |
1103 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
1104 | err = -EPERM; | |
1105 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
60e78d2c | 1106 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
9523a841 EVH |
1107 | return simple_getattr(mnt, dentry, stat); |
1108 | ||
bd238fb4 LI |
1109 | fid = v9fs_fid_lookup(dentry); |
1110 | if (IS_ERR(fid)) | |
da977b2c | 1111 | return PTR_ERR(fid); |
2bad8471 | 1112 | |
bd238fb4 LI |
1113 | st = p9_client_stat(fid); |
1114 | if (IS_ERR(st)) | |
1115 | return PTR_ERR(st); | |
2bad8471 | 1116 | |
bd238fb4 | 1117 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
2bad8471 | 1118 | generic_fillattr(dentry->d_inode, stat); |
2bad8471 | 1119 | |
bd238fb4 LI |
1120 | kfree(st); |
1121 | return 0; | |
2bad8471 EVH |
1122 | } |
1123 | ||
f0853122 SK |
1124 | static int |
1125 | v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, | |
1126 | struct kstat *stat) | |
1127 | { | |
1128 | int err; | |
1129 | struct v9fs_session_info *v9ses; | |
1130 | struct p9_fid *fid; | |
1131 | struct p9_stat_dotl *st; | |
1132 | ||
1133 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
1134 | err = -EPERM; | |
1135 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
1136 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) | |
1137 | return simple_getattr(mnt, dentry, stat); | |
1138 | ||
1139 | fid = v9fs_fid_lookup(dentry); | |
1140 | if (IS_ERR(fid)) | |
1141 | return PTR_ERR(fid); | |
1142 | ||
1143 | /* Ask for all the fields in stat structure. Server will return | |
1144 | * whatever it supports | |
1145 | */ | |
1146 | ||
1147 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); | |
1148 | if (IS_ERR(st)) | |
1149 | return PTR_ERR(st); | |
1150 | ||
1151 | v9fs_stat2inode_dotl(st, dentry->d_inode); | |
1152 | generic_fillattr(dentry->d_inode, stat); | |
1153 | /* Change block size to what the server returned */ | |
1154 | stat->blksize = st->st_blksize; | |
1155 | ||
1156 | kfree(st); | |
1157 | return 0; | |
1158 | } | |
1159 | ||
2bad8471 EVH |
1160 | /** |
1161 | * v9fs_vfs_setattr - set file metadata | |
1162 | * @dentry: file whose metadata to set | |
1163 | * @iattr: metadata assignment structure | |
1164 | * | |
1165 | */ | |
1166 | ||
1167 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
1168 | { | |
bd238fb4 LI |
1169 | int retval; |
1170 | struct v9fs_session_info *v9ses; | |
1171 | struct p9_fid *fid; | |
1172 | struct p9_wstat wstat; | |
2bad8471 | 1173 | |
bd238fb4 LI |
1174 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
1175 | retval = -EPERM; | |
1176 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
1177 | fid = v9fs_fid_lookup(dentry); | |
da977b2c EVH |
1178 | if(IS_ERR(fid)) |
1179 | return PTR_ERR(fid); | |
2bad8471 | 1180 | |
531b1094 | 1181 | v9fs_blank_wstat(&wstat); |
2bad8471 | 1182 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 1183 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
1184 | |
1185 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 1186 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
1187 | |
1188 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 1189 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
1190 | |
1191 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 1192 | wstat.length = iattr->ia_size; |
2bad8471 | 1193 | |
dd6102fb | 1194 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1195 | if (iattr->ia_valid & ATTR_UID) |
1196 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 1197 | |
531b1094 LI |
1198 | if (iattr->ia_valid & ATTR_GID) |
1199 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 EVH |
1200 | } |
1201 | ||
bd238fb4 LI |
1202 | retval = p9_client_wstat(fid, &wstat); |
1203 | if (retval >= 0) | |
1204 | retval = inode_setattr(dentry->d_inode, iattr); | |
2bad8471 | 1205 | |
bd238fb4 | 1206 | return retval; |
2bad8471 EVH |
1207 | } |
1208 | ||
87d7845a SK |
1209 | /** |
1210 | * v9fs_vfs_setattr_dotl - set file metadata | |
1211 | * @dentry: file whose metadata to set | |
1212 | * @iattr: metadata assignment structure | |
1213 | * | |
1214 | */ | |
1215 | ||
1216 | static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) | |
1217 | { | |
1218 | int retval; | |
1219 | struct v9fs_session_info *v9ses; | |
1220 | struct p9_fid *fid; | |
1221 | struct p9_iattr_dotl p9attr; | |
1222 | ||
1223 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); | |
1224 | ||
1225 | retval = inode_change_ok(dentry->d_inode, iattr); | |
1226 | if (retval) | |
1227 | return retval; | |
1228 | ||
1229 | p9attr.valid = iattr->ia_valid; | |
1230 | p9attr.mode = iattr->ia_mode; | |
1231 | p9attr.uid = iattr->ia_uid; | |
1232 | p9attr.gid = iattr->ia_gid; | |
1233 | p9attr.size = iattr->ia_size; | |
1234 | p9attr.atime_sec = iattr->ia_atime.tv_sec; | |
1235 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; | |
1236 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; | |
1237 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; | |
1238 | ||
1239 | retval = -EPERM; | |
1240 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
1241 | fid = v9fs_fid_lookup(dentry); | |
1242 | if (IS_ERR(fid)) | |
1243 | return PTR_ERR(fid); | |
1244 | ||
1245 | retval = p9_client_setattr(fid, &p9attr); | |
1246 | if (retval >= 0) | |
1247 | retval = inode_setattr(dentry->d_inode, iattr); | |
1248 | ||
1249 | return retval; | |
1250 | } | |
1251 | ||
2bad8471 | 1252 | /** |
531b1094 LI |
1253 | * v9fs_stat2inode - populate an inode structure with mistat info |
1254 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
1255 | * @inode: inode to populate |
1256 | * @sb: superblock of filesystem | |
1257 | * | |
1258 | */ | |
1259 | ||
1260 | void | |
51a87c55 | 1261 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
531b1094 | 1262 | struct super_block *sb) |
2bad8471 | 1263 | { |
531b1094 | 1264 | char ext[32]; |
5717144a AK |
1265 | char tag_name[14]; |
1266 | unsigned int i_nlink; | |
2bad8471 EVH |
1267 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
1268 | ||
1269 | inode->i_nlink = 1; | |
1270 | ||
531b1094 LI |
1271 | inode->i_atime.tv_sec = stat->atime; |
1272 | inode->i_mtime.tv_sec = stat->mtime; | |
1273 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 1274 | |
bd32b82d LI |
1275 | inode->i_uid = v9ses->dfltuid; |
1276 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 1277 | |
dd6102fb | 1278 | if (v9fs_proto_dotu(v9ses)) { |
531b1094 LI |
1279 | inode->i_uid = stat->n_uid; |
1280 | inode->i_gid = stat->n_gid; | |
2bad8471 | 1281 | } |
5717144a AK |
1282 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
1283 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { | |
1284 | /* | |
1285 | * Hadlink support got added later to | |
1286 | * to the .u extension. So there can be | |
1287 | * server out there that doesn't support | |
1288 | * this even with .u extension. So check | |
1289 | * for non NULL stat->extension | |
1290 | */ | |
1291 | strncpy(ext, stat->extension, sizeof(ext)); | |
1292 | /* HARDLINKCOUNT %u */ | |
1293 | sscanf(ext, "%13s %u", tag_name, &i_nlink); | |
1294 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) | |
1295 | inode->i_nlink = i_nlink; | |
1296 | } | |
1297 | } | |
531b1094 | 1298 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
2bad8471 EVH |
1299 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
1300 | char type = 0; | |
1301 | int major = -1; | |
1302 | int minor = -1; | |
531b1094 | 1303 | |
51a87c55 | 1304 | strncpy(ext, stat->extension, sizeof(ext)); |
531b1094 | 1305 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
2bad8471 EVH |
1306 | switch (type) { |
1307 | case 'c': | |
1308 | inode->i_mode &= ~S_IFBLK; | |
1309 | inode->i_mode |= S_IFCHR; | |
1310 | break; | |
1311 | case 'b': | |
1312 | break; | |
1313 | default: | |
bd238fb4 | 1314 | P9_DPRINTK(P9_DEBUG_ERROR, |
51a87c55 EVH |
1315 | "Unknown special type %c %s\n", type, |
1316 | stat->extension); | |
2bad8471 EVH |
1317 | }; |
1318 | inode->i_rdev = MKDEV(major, minor); | |
57c7b4e6 | 1319 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
2bad8471 EVH |
1320 | } else |
1321 | inode->i_rdev = 0; | |
1322 | ||
7549ae3e | 1323 | i_size_write(inode, stat->length); |
2bad8471 | 1324 | |
bd238fb4 | 1325 | /* not real number of blocks, but 512 byte ones ... */ |
7549ae3e | 1326 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
2bad8471 EVH |
1327 | } |
1328 | ||
f0853122 SK |
1329 | /** |
1330 | * v9fs_stat2inode_dotl - populate an inode structure with stat info | |
1331 | * @stat: stat structure | |
1332 | * @inode: inode to populate | |
1333 | * @sb: superblock of filesystem | |
1334 | * | |
1335 | */ | |
1336 | ||
1337 | void | |
1338 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) | |
1339 | { | |
1340 | ||
1341 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { | |
1342 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
1343 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
1344 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
1345 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
1346 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
1347 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
1348 | inode->i_uid = stat->st_uid; | |
1349 | inode->i_gid = stat->st_gid; | |
1350 | inode->i_nlink = stat->st_nlink; | |
1351 | inode->i_mode = stat->st_mode; | |
1352 | inode->i_rdev = new_decode_dev(stat->st_rdev); | |
1353 | ||
1354 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) | |
1355 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
1356 | ||
1357 | i_size_write(inode, stat->st_size); | |
1358 | inode->i_blocks = stat->st_blocks; | |
1359 | } else { | |
1360 | if (stat->st_result_mask & P9_STATS_ATIME) { | |
1361 | inode->i_atime.tv_sec = stat->st_atime_sec; | |
1362 | inode->i_atime.tv_nsec = stat->st_atime_nsec; | |
1363 | } | |
1364 | if (stat->st_result_mask & P9_STATS_MTIME) { | |
1365 | inode->i_mtime.tv_sec = stat->st_mtime_sec; | |
1366 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; | |
1367 | } | |
1368 | if (stat->st_result_mask & P9_STATS_CTIME) { | |
1369 | inode->i_ctime.tv_sec = stat->st_ctime_sec; | |
1370 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; | |
1371 | } | |
1372 | if (stat->st_result_mask & P9_STATS_UID) | |
1373 | inode->i_uid = stat->st_uid; | |
1374 | if (stat->st_result_mask & P9_STATS_GID) | |
1375 | inode->i_gid = stat->st_gid; | |
1376 | if (stat->st_result_mask & P9_STATS_NLINK) | |
1377 | inode->i_nlink = stat->st_nlink; | |
1378 | if (stat->st_result_mask & P9_STATS_MODE) { | |
1379 | inode->i_mode = stat->st_mode; | |
1380 | if ((S_ISBLK(inode->i_mode)) || | |
1381 | (S_ISCHR(inode->i_mode))) | |
1382 | init_special_inode(inode, inode->i_mode, | |
1383 | inode->i_rdev); | |
1384 | } | |
1385 | if (stat->st_result_mask & P9_STATS_RDEV) | |
1386 | inode->i_rdev = new_decode_dev(stat->st_rdev); | |
1387 | if (stat->st_result_mask & P9_STATS_SIZE) | |
1388 | i_size_write(inode, stat->st_size); | |
1389 | if (stat->st_result_mask & P9_STATS_BLOCKS) | |
1390 | inode->i_blocks = stat->st_blocks; | |
1391 | } | |
1392 | if (stat->st_result_mask & P9_STATS_GEN) | |
1393 | inode->i_generation = stat->st_gen; | |
1394 | ||
1395 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION | |
1396 | * because the inode structure does not have fields for them. | |
1397 | */ | |
1398 | } | |
1399 | ||
2bad8471 EVH |
1400 | /** |
1401 | * v9fs_qid2ino - convert qid into inode number | |
1402 | * @qid: qid to hash | |
1403 | * | |
1404 | * BUG: potential for inode number collisions? | |
1405 | */ | |
1406 | ||
bd238fb4 | 1407 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
1408 | { |
1409 | u64 path = qid->path + 2; | |
1410 | ino_t i = 0; | |
1411 | ||
1412 | if (sizeof(ino_t) == sizeof(path)) | |
1413 | memcpy(&i, &path, sizeof(ino_t)); | |
1414 | else | |
1415 | i = (ino_t) (path ^ (path >> 32)); | |
1416 | ||
1417 | return i; | |
1418 | } | |
1419 | ||
2bad8471 EVH |
1420 | /** |
1421 | * v9fs_readlink - read a symlink's location (internal version) | |
1422 | * @dentry: dentry for symlink | |
73c592b9 | 1423 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
1424 | * @buflen: length of buffer |
1425 | * | |
1426 | */ | |
1427 | ||
1428 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
1429 | { | |
bd238fb4 | 1430 | int retval; |
2bad8471 | 1431 | |
bd238fb4 LI |
1432 | struct v9fs_session_info *v9ses; |
1433 | struct p9_fid *fid; | |
51a87c55 | 1434 | struct p9_wstat *st; |
2bad8471 | 1435 | |
bd238fb4 LI |
1436 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
1437 | retval = -EPERM; | |
1438 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
1439 | fid = v9fs_fid_lookup(dentry); | |
ba17674f | 1440 | if (IS_ERR(fid)) |
da977b2c | 1441 | return PTR_ERR(fid); |
2bad8471 | 1442 | |
50cc42ff | 1443 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) |
bd238fb4 | 1444 | return -EBADF; |
2bad8471 | 1445 | |
bd238fb4 LI |
1446 | st = p9_client_stat(fid); |
1447 | if (IS_ERR(st)) | |
1448 | return PTR_ERR(st); | |
2bad8471 | 1449 | |
bd238fb4 | 1450 | if (!(st->mode & P9_DMSYMLINK)) { |
2bad8471 | 1451 | retval = -EINVAL; |
bd238fb4 | 1452 | goto done; |
2bad8471 EVH |
1453 | } |
1454 | ||
1455 | /* copy extension buffer into buffer */ | |
51a87c55 | 1456 | strncpy(buffer, st->extension, buflen); |
2bad8471 | 1457 | |
bd238fb4 | 1458 | P9_DPRINTK(P9_DEBUG_VFS, |
51a87c55 | 1459 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
2bad8471 | 1460 | |
2511cd0b | 1461 | retval = strnlen(buffer, buflen); |
bd238fb4 LI |
1462 | done: |
1463 | kfree(st); | |
2bad8471 EVH |
1464 | return retval; |
1465 | } | |
1466 | ||
2bad8471 EVH |
1467 | /** |
1468 | * v9fs_vfs_follow_link - follow a symlink path | |
1469 | * @dentry: dentry for symlink | |
1470 | * @nd: nameidata | |
1471 | * | |
1472 | */ | |
1473 | ||
1474 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1475 | { | |
1476 | int len = 0; | |
1477 | char *link = __getname(); | |
1478 | ||
bd238fb4 | 1479 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
2bad8471 EVH |
1480 | |
1481 | if (!link) | |
1482 | link = ERR_PTR(-ENOMEM); | |
1483 | else { | |
16cce6d2 | 1484 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
1485 | |
1486 | if (len < 0) { | |
ce44eeb6 | 1487 | __putname(link); |
2bad8471 EVH |
1488 | link = ERR_PTR(len); |
1489 | } else | |
2511cd0b | 1490 | link[min(len, PATH_MAX-1)] = 0; |
2bad8471 EVH |
1491 | } |
1492 | nd_set_link(nd, link); | |
1493 | ||
1494 | return NULL; | |
1495 | } | |
1496 | ||
1497 | /** | |
1498 | * v9fs_vfs_put_link - release a symlink path | |
1499 | * @dentry: dentry for symlink | |
1500 | * @nd: nameidata | |
ee443996 | 1501 | * @p: unused |
2bad8471 EVH |
1502 | * |
1503 | */ | |
1504 | ||
ee443996 EVH |
1505 | static void |
1506 | v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) | |
2bad8471 EVH |
1507 | { |
1508 | char *s = nd_get_link(nd); | |
1509 | ||
6ff23207 DG |
1510 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
1511 | IS_ERR(s) ? "<error>" : s); | |
2bad8471 | 1512 | if (!IS_ERR(s)) |
ce44eeb6 | 1513 | __putname(s); |
2bad8471 EVH |
1514 | } |
1515 | ||
ee443996 EVH |
1516 | /** |
1517 | * v9fs_vfs_mkspecial - create a special file | |
1518 | * @dir: inode to create special file in | |
1519 | * @dentry: dentry to create | |
1520 | * @mode: mode to create special file | |
1521 | * @extension: 9p2000.u format extension string representing special file | |
1522 | * | |
1523 | */ | |
1524 | ||
531b1094 LI |
1525 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
1526 | int mode, const char *extension) | |
2bad8471 | 1527 | { |
bd238fb4 | 1528 | u32 perm; |
531b1094 | 1529 | struct v9fs_session_info *v9ses; |
bd238fb4 | 1530 | struct p9_fid *fid; |
2bad8471 | 1531 | |
6a3124a3 | 1532 | v9ses = v9fs_inode2v9ses(dir); |
dd6102fb | 1533 | if (!v9fs_proto_dotu(v9ses)) { |
bd238fb4 | 1534 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1535 | return -EPERM; |
2bad8471 EVH |
1536 | } |
1537 | ||
da977b2c | 1538 | perm = unixmode2p9mode(v9ses, mode); |
bd238fb4 LI |
1539 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1540 | P9_OREAD); | |
1541 | if (IS_ERR(fid)) | |
1542 | return PTR_ERR(fid); | |
da977b2c | 1543 | |
bd238fb4 | 1544 | p9_client_clunk(fid); |
6a3124a3 | 1545 | return 0; |
531b1094 LI |
1546 | } |
1547 | ||
50cc42ff VJJ |
1548 | /** |
1549 | * v9fs_vfs_symlink_dotl - helper function to create symlinks | |
1550 | * @dir: directory inode containing symlink | |
1551 | * @dentry: dentry for symlink | |
1552 | * @symname: symlink data | |
1553 | * | |
1554 | * See Also: 9P2000.L RFC for more information | |
1555 | * | |
1556 | */ | |
1557 | ||
1558 | static int | |
1559 | v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, | |
1560 | const char *symname) | |
1561 | { | |
1562 | struct v9fs_session_info *v9ses; | |
1563 | struct p9_fid *dfid; | |
1564 | struct p9_fid *fid = NULL; | |
1565 | struct inode *inode; | |
1566 | struct p9_qid qid; | |
1567 | char *name; | |
1568 | int err; | |
1569 | gid_t gid; | |
1570 | ||
1571 | name = (char *) dentry->d_name.name; | |
1572 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", | |
1573 | dir->i_ino, name, symname); | |
1574 | v9ses = v9fs_inode2v9ses(dir); | |
1575 | ||
1576 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
1577 | if (IS_ERR(dfid)) { | |
1578 | err = PTR_ERR(dfid); | |
1579 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
1580 | return err; | |
1581 | } | |
1582 | ||
1583 | gid = v9fs_get_fsgid_for_create(dir); | |
1584 | ||
1585 | if (gid < 0) { | |
1586 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_egid failed %d\n", gid); | |
1587 | goto error; | |
1588 | } | |
1589 | ||
1590 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ | |
1591 | err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); | |
1592 | ||
1593 | if (err < 0) { | |
1594 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); | |
1595 | goto error; | |
1596 | } | |
1597 | ||
1598 | if (v9ses->cache) { | |
1599 | /* Now walk from the parent so we can get an unopened fid. */ | |
1600 | fid = p9_client_walk(dfid, 1, &name, 1); | |
1601 | if (IS_ERR(fid)) { | |
1602 | err = PTR_ERR(fid); | |
1603 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
1604 | err); | |
1605 | fid = NULL; | |
1606 | goto error; | |
1607 | } | |
1608 | ||
1609 | /* instantiate inode and assign the unopened fid to dentry */ | |
1610 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
1611 | if (IS_ERR(inode)) { | |
1612 | err = PTR_ERR(inode); | |
1613 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
1614 | err); | |
1615 | goto error; | |
1616 | } | |
1617 | dentry->d_op = &v9fs_cached_dentry_operations; | |
1618 | d_instantiate(dentry, inode); | |
1619 | err = v9fs_fid_add(dentry, fid); | |
1620 | if (err < 0) | |
1621 | goto error; | |
1622 | fid = NULL; | |
1623 | } else { | |
1624 | /* Not in cached mode. No need to populate inode with stat */ | |
1625 | inode = v9fs_get_inode(dir->i_sb, S_IFLNK); | |
1626 | if (IS_ERR(inode)) { | |
1627 | err = PTR_ERR(inode); | |
1628 | goto error; | |
1629 | } | |
1630 | dentry->d_op = &v9fs_dentry_operations; | |
1631 | d_instantiate(dentry, inode); | |
1632 | } | |
1633 | ||
1634 | error: | |
1635 | if (fid) | |
1636 | p9_client_clunk(fid); | |
1637 | ||
1638 | return err; | |
1639 | } | |
1640 | ||
531b1094 LI |
1641 | /** |
1642 | * v9fs_vfs_symlink - helper function to create symlinks | |
1643 | * @dir: directory inode containing symlink | |
1644 | * @dentry: dentry for symlink | |
1645 | * @symname: symlink data | |
1646 | * | |
ee443996 | 1647 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1648 | * |
1649 | */ | |
1650 | ||
1651 | static int | |
1652 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1653 | { | |
bd238fb4 LI |
1654 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
1655 | dentry->d_name.name, symname); | |
531b1094 LI |
1656 | |
1657 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); | |
1658 | } | |
1659 | ||
1660 | /** | |
1661 | * v9fs_vfs_link - create a hardlink | |
1662 | * @old_dentry: dentry for file to link to | |
1663 | * @dir: inode destination for new link | |
1664 | * @dentry: dentry for link | |
1665 | * | |
1666 | */ | |
1667 | ||
531b1094 LI |
1668 | static int |
1669 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1670 | struct dentry *dentry) | |
1671 | { | |
1672 | int retval; | |
bd238fb4 | 1673 | struct p9_fid *oldfid; |
531b1094 LI |
1674 | char *name; |
1675 | ||
bd238fb4 LI |
1676 | P9_DPRINTK(P9_DEBUG_VFS, |
1677 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
531b1094 LI |
1678 | old_dentry->d_name.name); |
1679 | ||
da977b2c | 1680 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1681 | if (IS_ERR(oldfid)) |
da977b2c | 1682 | return PTR_ERR(oldfid); |
531b1094 LI |
1683 | |
1684 | name = __getname(); | |
da977b2c EVH |
1685 | if (unlikely(!name)) { |
1686 | retval = -ENOMEM; | |
1687 | goto clunk_fid; | |
1688 | } | |
0710d36a | 1689 | |
16cce6d2 | 1690 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1691 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
531b1094 | 1692 | __putname(name); |
2bad8471 | 1693 | |
da977b2c | 1694 | clunk_fid: |
bd238fb4 | 1695 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1696 | return retval; |
1697 | } | |
1698 | ||
09d34ee5 EVH |
1699 | /** |
1700 | * v9fs_vfs_link_dotl - create a hardlink for dotl | |
1701 | * @old_dentry: dentry for file to link to | |
1702 | * @dir: inode destination for new link | |
1703 | * @dentry: dentry for link | |
1704 | * | |
1705 | */ | |
1706 | ||
1707 | static int | |
1708 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, | |
1709 | struct dentry *dentry) | |
1710 | { | |
1711 | int err; | |
1712 | struct p9_fid *dfid, *oldfid; | |
1713 | char *name; | |
1714 | struct v9fs_session_info *v9ses; | |
1715 | struct dentry *dir_dentry; | |
1716 | ||
1717 | P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", | |
1718 | dir->i_ino, old_dentry->d_name.name, | |
1719 | dentry->d_name.name); | |
1720 | ||
1721 | v9ses = v9fs_inode2v9ses(dir); | |
1722 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
1723 | dfid = v9fs_fid_lookup(dir_dentry); | |
1724 | if (IS_ERR(dfid)) | |
1725 | return PTR_ERR(dfid); | |
1726 | ||
1727 | oldfid = v9fs_fid_lookup(old_dentry); | |
1728 | if (IS_ERR(oldfid)) | |
1729 | return PTR_ERR(oldfid); | |
1730 | ||
1731 | name = (char *) dentry->d_name.name; | |
1732 | ||
1733 | err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); | |
1734 | ||
1735 | if (err < 0) { | |
1736 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); | |
1737 | return err; | |
1738 | } | |
1739 | ||
1740 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
1741 | /* Get the latest stat info from server. */ | |
1742 | struct p9_fid *fid; | |
1743 | struct p9_stat_dotl *st; | |
1744 | ||
1745 | fid = v9fs_fid_lookup(old_dentry); | |
1746 | if (IS_ERR(fid)) | |
1747 | return PTR_ERR(fid); | |
1748 | ||
1749 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); | |
1750 | if (IS_ERR(st)) | |
1751 | return PTR_ERR(st); | |
1752 | ||
1753 | v9fs_stat2inode_dotl(st, old_dentry->d_inode); | |
1754 | ||
1755 | kfree(st); | |
1756 | } else { | |
1757 | /* Caching disabled. No need to get upto date stat info. | |
1758 | * This dentry will be released immediately. So, just i_count++ | |
1759 | */ | |
1760 | atomic_inc(&old_dentry->d_inode->i_count); | |
1761 | } | |
1762 | ||
1763 | dentry->d_op = old_dentry->d_op; | |
1764 | d_instantiate(dentry, old_dentry->d_inode); | |
1765 | ||
1766 | return err; | |
1767 | } | |
1768 | ||
2bad8471 EVH |
1769 | /** |
1770 | * v9fs_vfs_mknod - create a special file | |
1771 | * @dir: inode destination for new link | |
1772 | * @dentry: dentry for file | |
1773 | * @mode: mode for creation | |
ee443996 | 1774 | * @rdev: device associated with special file |
2bad8471 EVH |
1775 | * |
1776 | */ | |
1777 | ||
1778 | static int | |
1779 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |
1780 | { | |
531b1094 LI |
1781 | int retval; |
1782 | char *name; | |
2bad8471 | 1783 | |
bd238fb4 LI |
1784 | P9_DPRINTK(P9_DEBUG_VFS, |
1785 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
2bad8471 EVH |
1786 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
1787 | ||
531b1094 LI |
1788 | if (!new_valid_dev(rdev)) |
1789 | return -EINVAL; | |
2bad8471 | 1790 | |
531b1094 | 1791 | name = __getname(); |
c0291a05 ET |
1792 | if (!name) |
1793 | return -ENOMEM; | |
2bad8471 EVH |
1794 | /* build extension */ |
1795 | if (S_ISBLK(mode)) | |
531b1094 | 1796 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1797 | else if (S_ISCHR(mode)) |
531b1094 | 1798 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1799 | else if (S_ISFIFO(mode)) |
531b1094 | 1800 | *name = 0; |
75cc5c9b VJ |
1801 | else if (S_ISSOCK(mode)) |
1802 | *name = 0; | |
2bad8471 | 1803 | else { |
531b1094 LI |
1804 | __putname(name); |
1805 | return -EINVAL; | |
2bad8471 EVH |
1806 | } |
1807 | ||
531b1094 LI |
1808 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1809 | __putname(name); | |
2bad8471 EVH |
1810 | |
1811 | return retval; | |
1812 | } | |
1813 | ||
4b43516a MK |
1814 | /** |
1815 | * v9fs_vfs_mknod_dotl - create a special file | |
1816 | * @dir: inode destination for new link | |
1817 | * @dentry: dentry for file | |
1818 | * @mode: mode for creation | |
1819 | * @rdev: device associated with special file | |
1820 | * | |
1821 | */ | |
1822 | static int | |
1823 | v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, | |
1824 | dev_t rdev) | |
1825 | { | |
1826 | int err; | |
1827 | char *name; | |
1828 | struct v9fs_session_info *v9ses; | |
1829 | struct p9_fid *fid = NULL, *dfid = NULL; | |
1830 | struct inode *inode; | |
1831 | gid_t gid; | |
1832 | struct p9_qid qid; | |
01a622bd | 1833 | struct dentry *dir_dentry; |
4b43516a MK |
1834 | |
1835 | P9_DPRINTK(P9_DEBUG_VFS, | |
1836 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
1837 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); | |
1838 | ||
1839 | if (!new_valid_dev(rdev)) | |
1840 | return -EINVAL; | |
1841 | ||
1842 | v9ses = v9fs_inode2v9ses(dir); | |
1843 | dir_dentry = v9fs_dentry_from_dir_inode(dir); | |
01a622bd | 1844 | dfid = v9fs_fid_lookup(dir_dentry); |
4b43516a MK |
1845 | if (IS_ERR(dfid)) { |
1846 | err = PTR_ERR(dfid); | |
1847 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); | |
1848 | dfid = NULL; | |
1849 | goto error; | |
1850 | } | |
1851 | ||
1852 | gid = v9fs_get_fsgid_for_create(dir); | |
1853 | if (gid < 0) { | |
1854 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); | |
1855 | goto error; | |
1856 | } | |
1857 | ||
1858 | name = (char *) dentry->d_name.name; | |
1859 | ||
1860 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); | |
1861 | if (err < 0) | |
1862 | goto error; | |
1863 | ||
1864 | /* instantiate inode and assign the unopened fid to the dentry */ | |
1865 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { | |
1866 | fid = p9_client_walk(dfid, 1, &name, 1); | |
1867 | if (IS_ERR(fid)) { | |
1868 | err = PTR_ERR(fid); | |
1869 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", | |
1870 | err); | |
1871 | fid = NULL; | |
1872 | goto error; | |
1873 | } | |
1874 | ||
1875 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
1876 | if (IS_ERR(inode)) { | |
1877 | err = PTR_ERR(inode); | |
1878 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", | |
1879 | err); | |
1880 | goto error; | |
1881 | } | |
1882 | dentry->d_op = &v9fs_cached_dentry_operations; | |
1883 | d_instantiate(dentry, inode); | |
1884 | err = v9fs_fid_add(dentry, fid); | |
1885 | if (err < 0) | |
1886 | goto error; | |
1887 | fid = NULL; | |
1888 | } else { | |
1889 | /* | |
1890 | * Not in cached mode. No need to populate inode with stat. | |
1891 | * socket syscall returns a fd, so we need instantiate | |
1892 | */ | |
1893 | inode = v9fs_get_inode(dir->i_sb, mode); | |
1894 | if (IS_ERR(inode)) { | |
1895 | err = PTR_ERR(inode); | |
1896 | goto error; | |
1897 | } | |
1898 | dentry->d_op = &v9fs_dentry_operations; | |
1899 | d_instantiate(dentry, inode); | |
1900 | } | |
1901 | ||
1902 | error: | |
1903 | if (fid) | |
1904 | p9_client_clunk(fid); | |
1905 | return err; | |
1906 | } | |
1907 | ||
9b6533c9 SK |
1908 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
1909 | .create = v9fs_vfs_create, | |
1910 | .lookup = v9fs_vfs_lookup, | |
1911 | .symlink = v9fs_vfs_symlink, | |
50cc42ff | 1912 | .link = v9fs_vfs_link, |
9b6533c9 SK |
1913 | .unlink = v9fs_vfs_unlink, |
1914 | .mkdir = v9fs_vfs_mkdir, | |
1915 | .rmdir = v9fs_vfs_rmdir, | |
4b43516a | 1916 | .mknod = v9fs_vfs_mknod_dotl, |
9b6533c9 SK |
1917 | .rename = v9fs_vfs_rename, |
1918 | .getattr = v9fs_vfs_getattr, | |
1919 | .setattr = v9fs_vfs_setattr, | |
1920 | }; | |
1921 | ||
1922 | static const struct inode_operations v9fs_dir_inode_operations_dotl = { | |
5643135a | 1923 | .create = v9fs_vfs_create_dotl, |
2bad8471 | 1924 | .lookup = v9fs_vfs_lookup, |
50cc42ff VJJ |
1925 | .link = v9fs_vfs_link_dotl, |
1926 | .symlink = v9fs_vfs_symlink_dotl, | |
2bad8471 | 1927 | .unlink = v9fs_vfs_unlink, |
01a622bd | 1928 | .mkdir = v9fs_vfs_mkdir_dotl, |
2bad8471 | 1929 | .rmdir = v9fs_vfs_rmdir, |
4b43516a | 1930 | .mknod = v9fs_vfs_mknod_dotl, |
2bad8471 | 1931 | .rename = v9fs_vfs_rename, |
f0853122 | 1932 | .getattr = v9fs_vfs_getattr_dotl, |
87d7845a | 1933 | .setattr = v9fs_vfs_setattr_dotl, |
2bad8471 EVH |
1934 | }; |
1935 | ||
754661f1 | 1936 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1937 | .create = v9fs_vfs_create, |
1938 | .lookup = v9fs_vfs_lookup, | |
1939 | .unlink = v9fs_vfs_unlink, | |
1940 | .mkdir = v9fs_vfs_mkdir, | |
1941 | .rmdir = v9fs_vfs_rmdir, | |
1942 | .mknod = v9fs_vfs_mknod, | |
1943 | .rename = v9fs_vfs_rename, | |
1944 | .getattr = v9fs_vfs_getattr, | |
1945 | .setattr = v9fs_vfs_setattr, | |
1946 | }; | |
1947 | ||
754661f1 | 1948 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1949 | .getattr = v9fs_vfs_getattr, |
1950 | .setattr = v9fs_vfs_setattr, | |
1951 | }; | |
1952 | ||
9b6533c9 | 1953 | static const struct inode_operations v9fs_file_inode_operations_dotl = { |
f0853122 | 1954 | .getattr = v9fs_vfs_getattr_dotl, |
87d7845a | 1955 | .setattr = v9fs_vfs_setattr_dotl, |
9b6533c9 SK |
1956 | }; |
1957 | ||
754661f1 | 1958 | static const struct inode_operations v9fs_symlink_inode_operations = { |
204f2f0e | 1959 | .readlink = generic_readlink, |
2bad8471 EVH |
1960 | .follow_link = v9fs_vfs_follow_link, |
1961 | .put_link = v9fs_vfs_put_link, | |
1962 | .getattr = v9fs_vfs_getattr, | |
1963 | .setattr = v9fs_vfs_setattr, | |
1964 | }; | |
9b6533c9 SK |
1965 | |
1966 | static const struct inode_operations v9fs_symlink_inode_operations_dotl = { | |
1967 | .readlink = generic_readlink, | |
1968 | .follow_link = v9fs_vfs_follow_link, | |
1969 | .put_link = v9fs_vfs_put_link, | |
f0853122 | 1970 | .getattr = v9fs_vfs_getattr_dotl, |
87d7845a | 1971 | .setattr = v9fs_vfs_setattr_dotl, |
9b6533c9 | 1972 | }; |