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> |
bd238fb4 LI |
37 | #include <net/9p/9p.h> |
38 | #include <net/9p/client.h> | |
2bad8471 | 39 | |
2bad8471 | 40 | #include "v9fs.h" |
2bad8471 | 41 | #include "v9fs_vfs.h" |
2bad8471 EVH |
42 | #include "fid.h" |
43 | ||
754661f1 AV |
44 | static const struct inode_operations v9fs_dir_inode_operations; |
45 | static const struct inode_operations v9fs_dir_inode_operations_ext; | |
46 | static const struct inode_operations v9fs_file_inode_operations; | |
47 | static const struct inode_operations v9fs_symlink_inode_operations; | |
2bad8471 EVH |
48 | |
49 | /** | |
50 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
51 | * @v9ses: v9fs session information | |
52 | * @mode: mode to convert | |
53 | * | |
54 | */ | |
55 | ||
73c592b9 | 56 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
57 | { |
58 | int res; | |
59 | res = mode & 0777; | |
60 | if (S_ISDIR(mode)) | |
bd238fb4 | 61 | res |= P9_DMDIR; |
2405669b | 62 | if (v9fs_extended(v9ses)) { |
2bad8471 | 63 | if (S_ISLNK(mode)) |
bd238fb4 | 64 | res |= P9_DMSYMLINK; |
2bad8471 EVH |
65 | if (v9ses->nodev == 0) { |
66 | if (S_ISSOCK(mode)) | |
bd238fb4 | 67 | res |= P9_DMSOCKET; |
2bad8471 | 68 | if (S_ISFIFO(mode)) |
bd238fb4 | 69 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 70 | if (S_ISBLK(mode)) |
bd238fb4 | 71 | res |= P9_DMDEVICE; |
2bad8471 | 72 | if (S_ISCHR(mode)) |
bd238fb4 | 73 | res |= P9_DMDEVICE; |
2bad8471 EVH |
74 | } |
75 | ||
76 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 77 | res |= P9_DMSETUID; |
2bad8471 | 78 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 LI |
79 | res |= P9_DMSETGID; |
80 | if ((mode & P9_DMLINK)) | |
81 | res |= P9_DMLINK; | |
2bad8471 EVH |
82 | } |
83 | ||
84 | return res; | |
85 | } | |
86 | ||
87 | /** | |
88 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
89 | * @v9ses: v9fs session information | |
90 | * @mode: mode to convert | |
91 | * | |
92 | */ | |
93 | ||
73c592b9 | 94 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
95 | { |
96 | int res; | |
97 | ||
98 | res = mode & 0777; | |
99 | ||
bd238fb4 | 100 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 101 | res |= S_IFDIR; |
2405669b | 102 | else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses))) |
2bad8471 | 103 | res |= S_IFLNK; |
2405669b | 104 | else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses)) |
2bad8471 EVH |
105 | && (v9ses->nodev == 0)) |
106 | res |= S_IFSOCK; | |
2405669b | 107 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses)) |
2bad8471 EVH |
108 | && (v9ses->nodev == 0)) |
109 | res |= S_IFIFO; | |
2405669b | 110 | else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses)) |
2bad8471 EVH |
111 | && (v9ses->nodev == 0)) |
112 | res |= S_IFBLK; | |
113 | else | |
114 | res |= S_IFREG; | |
115 | ||
2405669b | 116 | if (v9fs_extended(v9ses)) { |
bd238fb4 | 117 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
2bad8471 EVH |
118 | res |= S_ISUID; |
119 | ||
bd238fb4 | 120 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
2bad8471 EVH |
121 | res |= S_ISGID; |
122 | } | |
123 | ||
124 | return res; | |
125 | } | |
126 | ||
6a3124a3 LI |
127 | int v9fs_uflags2omode(int uflags) |
128 | { | |
129 | int ret; | |
130 | ||
131 | ret = 0; | |
132 | switch (uflags&3) { | |
133 | default: | |
134 | case O_RDONLY: | |
bd238fb4 | 135 | ret = P9_OREAD; |
6a3124a3 LI |
136 | break; |
137 | ||
138 | case O_WRONLY: | |
bd238fb4 | 139 | ret = P9_OWRITE; |
6a3124a3 LI |
140 | break; |
141 | ||
142 | case O_RDWR: | |
bd238fb4 | 143 | ret = P9_ORDWR; |
6a3124a3 LI |
144 | break; |
145 | } | |
146 | ||
147 | if (uflags & O_EXCL) | |
bd238fb4 | 148 | ret |= P9_OEXCL; |
6a3124a3 LI |
149 | |
150 | if (uflags & O_TRUNC) | |
bd238fb4 | 151 | ret |= P9_OTRUNC; |
6a3124a3 LI |
152 | |
153 | if (uflags & O_APPEND) | |
bd238fb4 | 154 | ret |= P9_OAPPEND; |
6a3124a3 LI |
155 | |
156 | return ret; | |
157 | } | |
158 | ||
2bad8471 | 159 | /** |
531b1094 | 160 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
2bad8471 | 161 | * @v9ses: 9P session info (for determining extended mode) |
531b1094 | 162 | * @wstat: structure to initialize |
2bad8471 EVH |
163 | * |
164 | */ | |
165 | ||
73c592b9 | 166 | static void |
bd238fb4 | 167 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 168 | { |
531b1094 LI |
169 | wstat->type = ~0; |
170 | wstat->dev = ~0; | |
171 | wstat->qid.type = ~0; | |
172 | wstat->qid.version = ~0; | |
173 | *((long long *)&wstat->qid.path) = ~0; | |
174 | wstat->mode = ~0; | |
175 | wstat->atime = ~0; | |
176 | wstat->mtime = ~0; | |
177 | wstat->length = ~0; | |
178 | wstat->name = NULL; | |
179 | wstat->uid = NULL; | |
180 | wstat->gid = NULL; | |
181 | wstat->muid = NULL; | |
182 | wstat->n_uid = ~0; | |
183 | wstat->n_gid = ~0; | |
184 | wstat->n_muid = ~0; | |
185 | wstat->extension = NULL; | |
2bad8471 EVH |
186 | } |
187 | ||
188 | /** | |
189 | * v9fs_get_inode - helper function to setup an inode | |
190 | * @sb: superblock | |
191 | * @mode: mode to setup inode with | |
192 | * | |
193 | */ | |
194 | ||
195 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) | |
196 | { | |
6a3124a3 | 197 | struct inode *inode; |
b501611a | 198 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
2bad8471 | 199 | |
bd238fb4 | 200 | P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
2bad8471 EVH |
201 | |
202 | inode = new_inode(sb); | |
203 | if (inode) { | |
204 | inode->i_mode = mode; | |
205 | inode->i_uid = current->fsuid; | |
206 | inode->i_gid = current->fsgid; | |
2bad8471 EVH |
207 | inode->i_blocks = 0; |
208 | inode->i_rdev = 0; | |
209 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
147b31cf | 210 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
2bad8471 EVH |
211 | |
212 | switch (mode & S_IFMT) { | |
213 | case S_IFIFO: | |
214 | case S_IFBLK: | |
215 | case S_IFCHR: | |
216 | case S_IFSOCK: | |
2405669b | 217 | if (!v9fs_extended(v9ses)) { |
bd238fb4 LI |
218 | P9_DPRINTK(P9_DEBUG_ERROR, |
219 | "special files without extended mode\n"); | |
b501611a EVH |
220 | return ERR_PTR(-EINVAL); |
221 | } | |
5d58bec5 EVH |
222 | init_special_inode(inode, inode->i_mode, |
223 | inode->i_rdev); | |
224 | break; | |
2bad8471 EVH |
225 | case S_IFREG: |
226 | inode->i_op = &v9fs_file_inode_operations; | |
227 | inode->i_fop = &v9fs_file_operations; | |
228 | break; | |
b501611a | 229 | case S_IFLNK: |
2405669b | 230 | if (!v9fs_extended(v9ses)) { |
bd238fb4 LI |
231 | P9_DPRINTK(P9_DEBUG_ERROR, |
232 | "extended modes used w/o 9P2000.u\n"); | |
b501611a EVH |
233 | return ERR_PTR(-EINVAL); |
234 | } | |
235 | inode->i_op = &v9fs_symlink_inode_operations; | |
236 | break; | |
2bad8471 | 237 | case S_IFDIR: |
d8c76e6f | 238 | inc_nlink(inode); |
2405669b | 239 | if (v9fs_extended(v9ses)) |
b501611a EVH |
240 | inode->i_op = &v9fs_dir_inode_operations_ext; |
241 | else | |
242 | inode->i_op = &v9fs_dir_inode_operations; | |
2bad8471 EVH |
243 | inode->i_fop = &v9fs_dir_operations; |
244 | break; | |
2bad8471 | 245 | default: |
bd238fb4 LI |
246 | P9_DPRINTK(P9_DEBUG_ERROR, |
247 | "BAD mode 0x%x S_IFMT 0x%x\n", | |
2bad8471 EVH |
248 | mode, mode & S_IFMT); |
249 | return ERR_PTR(-EINVAL); | |
250 | } | |
251 | } else { | |
bd238fb4 | 252 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); |
2bad8471 EVH |
253 | return ERR_PTR(-ENOMEM); |
254 | } | |
255 | return inode; | |
256 | } | |
257 | ||
bd238fb4 | 258 | /* |
6a3124a3 LI |
259 | static struct v9fs_fid* |
260 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) | |
261 | { | |
262 | int err; | |
736c4b85 | 263 | int nfid; |
6a3124a3 LI |
264 | struct v9fs_fid *ret; |
265 | struct v9fs_fcall *fcall; | |
266 | ||
267 | nfid = v9fs_get_idpool(&v9ses->fidpool); | |
268 | if (nfid < 0) { | |
0b8dd177 | 269 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 270 | return ERR_PTR(-ENOSPC); |
0b8dd177 LI |
271 | } |
272 | ||
6a3124a3 LI |
273 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
274 | &fcall); | |
275 | ||
276 | if (err < 0) { | |
41e5a6ac LI |
277 | if (fcall && fcall->id == RWALK) |
278 | goto clunk_fid; | |
279 | ||
6a3124a3 LI |
280 | PRINT_FCALL_ERROR("walk error", fcall); |
281 | v9fs_put_idpool(nfid, &v9ses->fidpool); | |
282 | goto error; | |
0b8dd177 | 283 | } |
6a3124a3 | 284 | |
3cf6429a LI |
285 | kfree(fcall); |
286 | fcall = NULL; | |
6a3124a3 LI |
287 | ret = v9fs_fid_create(v9ses, nfid); |
288 | if (!ret) { | |
289 | err = -ENOMEM; | |
290 | goto clunk_fid; | |
291 | } | |
0b8dd177 | 292 | |
6a3124a3 LI |
293 | err = v9fs_fid_insert(ret, dentry); |
294 | if (err < 0) { | |
295 | v9fs_fid_destroy(ret); | |
296 | goto clunk_fid; | |
0b8dd177 | 297 | } |
2bad8471 | 298 | |
6a3124a3 | 299 | return ret; |
2bad8471 | 300 | |
6a3124a3 LI |
301 | clunk_fid: |
302 | v9fs_t_clunk(v9ses, nfid); | |
2bad8471 | 303 | |
6a3124a3 LI |
304 | error: |
305 | kfree(fcall); | |
306 | return ERR_PTR(err); | |
307 | } | |
bd238fb4 | 308 | */ |
2bad8471 | 309 | |
5174fdab | 310 | static struct inode * |
bd238fb4 | 311 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
6a3124a3 LI |
312 | struct super_block *sb) |
313 | { | |
314 | int err, umode; | |
315 | struct inode *ret; | |
bd238fb4 | 316 | struct p9_stat *st; |
531b1094 | 317 | |
6a3124a3 | 318 | ret = NULL; |
bd238fb4 LI |
319 | st = p9_client_stat(fid); |
320 | if (IS_ERR(st)) { | |
321 | err = PTR_ERR(st); | |
322 | st = NULL; | |
6a3124a3 | 323 | goto error; |
2bad8471 EVH |
324 | } |
325 | ||
bd238fb4 | 326 | umode = p9mode2unixmode(v9ses, st->mode); |
6a3124a3 LI |
327 | ret = v9fs_get_inode(sb, umode); |
328 | if (IS_ERR(ret)) { | |
329 | err = PTR_ERR(ret); | |
330 | ret = NULL; | |
331 | goto error; | |
332 | } | |
2bad8471 | 333 | |
bd238fb4 LI |
334 | v9fs_stat2inode(st, ret, sb); |
335 | ret->i_ino = v9fs_qid2ino(&st->qid); | |
336 | kfree(st); | |
6a3124a3 | 337 | return ret; |
2bad8471 | 338 | |
6a3124a3 | 339 | error: |
bd238fb4 | 340 | kfree(st); |
6a3124a3 LI |
341 | if (ret) |
342 | iput(ret); | |
2bad8471 | 343 | |
6a3124a3 | 344 | return ERR_PTR(err); |
2bad8471 EVH |
345 | } |
346 | ||
347 | /** | |
348 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 EVH |
349 | * @dir: directory inode that is being deleted |
350 | * @file: dentry that is being deleted | |
351 | * @rmdir: removing a directory | |
2bad8471 EVH |
352 | * |
353 | */ | |
354 | ||
355 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) | |
356 | { | |
bd238fb4 LI |
357 | struct inode *file_inode; |
358 | struct v9fs_session_info *v9ses; | |
359 | struct p9_fid *v9fid; | |
2bad8471 | 360 | |
bd238fb4 | 361 | P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, |
2bad8471 EVH |
362 | rmdir); |
363 | ||
364 | file_inode = file->d_inode; | |
2bad8471 | 365 | v9ses = v9fs_inode2v9ses(file_inode); |
c959df9f | 366 | v9fid = v9fs_fid_clone(file); |
da977b2c EVH |
367 | if(IS_ERR(v9fid)) |
368 | return PTR_ERR(v9fid); | |
2bad8471 | 369 | |
bd238fb4 | 370 | return p9_client_remove(v9fid); |
2bad8471 EVH |
371 | } |
372 | ||
6a3124a3 LI |
373 | static int |
374 | v9fs_open_created(struct inode *inode, struct file *file) | |
375 | { | |
376 | return 0; | |
377 | } | |
378 | ||
bd238fb4 | 379 | |
2bad8471 | 380 | /** |
bd238fb4 LI |
381 | * v9fs_create - Create a file |
382 | * @dentry: dentry that is being created | |
383 | * @perm: create permissions | |
384 | * @mode: open mode | |
2bad8471 EVH |
385 | * |
386 | */ | |
bd238fb4 LI |
387 | static struct p9_fid * |
388 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
389 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 390 | { |
6a3124a3 | 391 | int err; |
bd238fb4 LI |
392 | char *name; |
393 | struct p9_fid *dfid, *ofid, *fid; | |
6a3124a3 | 394 | struct inode *inode; |
6a3124a3 | 395 | |
bd238fb4 LI |
396 | err = 0; |
397 | ofid = NULL; | |
398 | fid = NULL; | |
399 | name = (char *) dentry->d_name.name; | |
da977b2c EVH |
400 | dfid = v9fs_fid_clone(dentry->d_parent); |
401 | if(IS_ERR(dfid)) { | |
402 | err = PTR_ERR(dfid); | |
bd238fb4 | 403 | dfid = NULL; |
da977b2c EVH |
404 | goto error; |
405 | } | |
6a3124a3 | 406 | |
bd238fb4 LI |
407 | /* clone a fid to use for creation */ |
408 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
409 | if (IS_ERR(ofid)) { | |
410 | err = PTR_ERR(ofid); | |
411 | ofid = NULL; | |
412 | goto error; | |
413 | } | |
6a3124a3 | 414 | |
bd238fb4 LI |
415 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
416 | if (err < 0) | |
417 | goto error; | |
6a3124a3 | 418 | |
bd238fb4 LI |
419 | /* now walk from the parent so we can get unopened fid */ |
420 | fid = p9_client_walk(dfid, 1, &name, 0); | |
421 | if (IS_ERR(fid)) { | |
422 | err = PTR_ERR(fid); | |
423 | fid = NULL; | |
6a3124a3 | 424 | goto error; |
bd238fb4 LI |
425 | } else |
426 | dfid = NULL; | |
6a3124a3 | 427 | |
bd238fb4 LI |
428 | /* instantiate inode and assign the unopened fid to the dentry */ |
429 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
6a3124a3 LI |
430 | if (IS_ERR(inode)) { |
431 | err = PTR_ERR(inode); | |
6a3124a3 LI |
432 | goto error; |
433 | } | |
434 | ||
e03abc0c EVH |
435 | if(v9ses->cache) |
436 | dentry->d_op = &v9fs_cached_dentry_operations; | |
437 | else | |
438 | dentry->d_op = &v9fs_dentry_operations; | |
bd238fb4 | 439 | |
6a3124a3 | 440 | d_instantiate(dentry, inode); |
bd238fb4 LI |
441 | v9fs_fid_add(dentry, fid); |
442 | return ofid; | |
6a3124a3 | 443 | |
bd238fb4 LI |
444 | error: |
445 | if (dfid) | |
446 | p9_client_clunk(dfid); | |
447 | ||
448 | if (ofid) | |
449 | p9_client_clunk(ofid); | |
450 | ||
451 | if (fid) | |
452 | p9_client_clunk(fid); | |
453 | ||
454 | return ERR_PTR(err); | |
455 | } | |
456 | ||
457 | /** | |
458 | * v9fs_vfs_create - VFS hook to create files | |
459 | * @inode: directory inode that is being created | |
460 | * @dentry: dentry that is being deleted | |
461 | * @mode: create permissions | |
462 | * @nd: path information | |
463 | * | |
464 | */ | |
6a3124a3 | 465 | |
bd238fb4 LI |
466 | static int |
467 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, | |
468 | struct nameidata *nd) | |
469 | { | |
470 | int err; | |
471 | u32 perm; | |
472 | int flags; | |
473 | struct v9fs_session_info *v9ses; | |
474 | struct p9_fid *fid; | |
475 | struct file *filp; | |
476 | ||
477 | err = 0; | |
478 | fid = NULL; | |
479 | v9ses = v9fs_inode2v9ses(dir); | |
480 | perm = unixmode2p9mode(v9ses, mode); | |
481 | if (nd && nd->flags & LOOKUP_OPEN) | |
482 | flags = nd->intent.open.flags - 1; | |
483 | else | |
484 | flags = O_RDWR; | |
485 | ||
486 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
487 | v9fs_uflags2omode(flags)); | |
488 | if (IS_ERR(fid)) { | |
489 | err = PTR_ERR(fid); | |
490 | fid = NULL; | |
491 | goto error; | |
492 | } | |
493 | ||
494 | /* if we are opening a file, assign the open fid to the file */ | |
495 | if (nd && nd->flags & LOOKUP_OPEN) { | |
6a3124a3 LI |
496 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
497 | if (IS_ERR(filp)) { | |
bd238fb4 LI |
498 | err = PTR_ERR(filp); |
499 | goto error; | |
6a3124a3 LI |
500 | } |
501 | ||
bd238fb4 LI |
502 | filp->private_data = fid; |
503 | } else | |
504 | p9_client_clunk(fid); | |
6a3124a3 LI |
505 | |
506 | return 0; | |
507 | ||
508 | error: | |
bd238fb4 LI |
509 | if (fid) |
510 | p9_client_clunk(fid); | |
6a3124a3 | 511 | |
6a3124a3 | 512 | return err; |
2bad8471 EVH |
513 | } |
514 | ||
515 | /** | |
516 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
73c592b9 | 517 | * @inode: inode that is being unlinked |
2bad8471 EVH |
518 | * @dentry: dentry that is being unlinked |
519 | * @mode: mode for new directory | |
520 | * | |
521 | */ | |
522 | ||
6a3124a3 | 523 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
2bad8471 | 524 | { |
6a3124a3 | 525 | int err; |
bd238fb4 | 526 | u32 perm; |
6a3124a3 | 527 | struct v9fs_session_info *v9ses; |
bd238fb4 | 528 | struct p9_fid *fid; |
6a3124a3 | 529 | |
bd238fb4 LI |
530 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
531 | err = 0; | |
6a3124a3 | 532 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 533 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
534 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
535 | if (IS_ERR(fid)) { | |
536 | err = PTR_ERR(fid); | |
537 | fid = NULL; | |
6a3124a3 LI |
538 | } |
539 | ||
bd238fb4 LI |
540 | if (fid) |
541 | p9_client_clunk(fid); | |
6a3124a3 | 542 | |
6a3124a3 | 543 | return err; |
2bad8471 EVH |
544 | } |
545 | ||
546 | /** | |
547 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
548 | * @dir: inode that is being walked from | |
549 | * @dentry: dentry that is being walked to? | |
550 | * @nameidata: path data | |
551 | * | |
552 | */ | |
553 | ||
554 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, | |
555 | struct nameidata *nameidata) | |
556 | { | |
557 | struct super_block *sb; | |
558 | struct v9fs_session_info *v9ses; | |
bd238fb4 | 559 | struct p9_fid *dfid, *fid; |
2bad8471 | 560 | struct inode *inode; |
bd238fb4 | 561 | char *name; |
2bad8471 EVH |
562 | int result = 0; |
563 | ||
bd238fb4 | 564 | P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", |
731805b4 | 565 | dir, dentry->d_name.name, dentry, nameidata); |
2bad8471 EVH |
566 | |
567 | sb = dir->i_sb; | |
568 | v9ses = v9fs_inode2v9ses(dir); | |
bd238fb4 LI |
569 | dfid = v9fs_fid_lookup(dentry->d_parent); |
570 | if (IS_ERR(dfid)) | |
571 | return ERR_PTR(PTR_ERR(dfid)); | |
572 | ||
573 | name = (char *) dentry->d_name.name; | |
574 | fid = p9_client_walk(dfid, 1, &name, 1); | |
575 | if (IS_ERR(fid)) { | |
576 | result = PTR_ERR(fid); | |
2bad8471 EVH |
577 | if (result == -ENOENT) { |
578 | d_add(dentry, NULL); | |
2bad8471 EVH |
579 | return NULL; |
580 | } | |
2bad8471 | 581 | |
bd238fb4 | 582 | return ERR_PTR(result); |
2bad8471 EVH |
583 | } |
584 | ||
bd238fb4 LI |
585 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
586 | if (IS_ERR(inode)) { | |
587 | result = PTR_ERR(inode); | |
588 | inode = NULL; | |
589 | goto error; | |
2bad8471 EVH |
590 | } |
591 | ||
bd238fb4 | 592 | result = v9fs_fid_add(dentry, fid); |
6a3124a3 | 593 | if (result < 0) |
bd238fb4 | 594 | goto error; |
6a3124a3 | 595 | |
e03abc0c EVH |
596 | if((fid->qid.version)&&(v9ses->cache)) |
597 | dentry->d_op = &v9fs_cached_dentry_operations; | |
598 | else | |
599 | dentry->d_op = &v9fs_dentry_operations; | |
2bad8471 EVH |
600 | |
601 | d_add(dentry, inode); | |
2bad8471 EVH |
602 | return NULL; |
603 | ||
bd238fb4 LI |
604 | error: |
605 | if (fid) | |
606 | p9_client_clunk(fid); | |
da977b2c | 607 | |
2bad8471 EVH |
608 | return ERR_PTR(result); |
609 | } | |
610 | ||
611 | /** | |
612 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
613 | * @i: inode that is being unlinked | |
73c592b9 | 614 | * @d: dentry that is being unlinked |
2bad8471 EVH |
615 | * |
616 | */ | |
617 | ||
618 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) | |
619 | { | |
620 | return v9fs_remove(i, d, 0); | |
621 | } | |
622 | ||
623 | /** | |
624 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
625 | * @i: inode that is being unlinked | |
73c592b9 | 626 | * @d: dentry that is being unlinked |
2bad8471 EVH |
627 | * |
628 | */ | |
629 | ||
630 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) | |
631 | { | |
632 | return v9fs_remove(i, d, 1); | |
633 | } | |
634 | ||
635 | /** | |
636 | * v9fs_vfs_rename - VFS hook to rename an inode | |
637 | * @old_dir: old dir inode | |
638 | * @old_dentry: old dentry | |
639 | * @new_dir: new dir inode | |
640 | * @new_dentry: new dentry | |
641 | * | |
642 | */ | |
643 | ||
644 | static int | |
645 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
646 | struct inode *new_dir, struct dentry *new_dentry) | |
647 | { | |
bd238fb4 LI |
648 | struct inode *old_inode; |
649 | struct v9fs_session_info *v9ses; | |
650 | struct p9_fid *oldfid; | |
651 | struct p9_fid *olddirfid; | |
652 | struct p9_fid *newdirfid; | |
653 | struct p9_wstat wstat; | |
654 | int retval; | |
2bad8471 | 655 | |
bd238fb4 LI |
656 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
657 | retval = 0; | |
658 | old_inode = old_dentry->d_inode; | |
659 | v9ses = v9fs_inode2v9ses(old_inode); | |
660 | oldfid = v9fs_fid_lookup(old_dentry); | |
da977b2c EVH |
661 | if(IS_ERR(oldfid)) |
662 | return PTR_ERR(oldfid); | |
663 | ||
664 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); | |
665 | if(IS_ERR(olddirfid)) { | |
666 | retval = PTR_ERR(olddirfid); | |
bd238fb4 | 667 | goto done; |
da977b2c EVH |
668 | } |
669 | ||
670 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); | |
671 | if(IS_ERR(newdirfid)) { | |
672 | retval = PTR_ERR(newdirfid); | |
bd238fb4 | 673 | goto clunk_olddir; |
2bad8471 EVH |
674 | } |
675 | ||
676 | /* 9P can only handle file rename in the same directory */ | |
677 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { | |
bd238fb4 LI |
678 | P9_DPRINTK(P9_DEBUG_ERROR, |
679 | "old dir and new dir are different\n"); | |
621997cd | 680 | retval = -EXDEV; |
bd238fb4 | 681 | goto clunk_newdir; |
2bad8471 EVH |
682 | } |
683 | ||
531b1094 LI |
684 | v9fs_blank_wstat(&wstat); |
685 | wstat.muid = v9ses->name; | |
686 | wstat.name = (char *) new_dentry->d_name.name; | |
bd238fb4 | 687 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 688 | |
bd238fb4 LI |
689 | clunk_newdir: |
690 | p9_client_clunk(olddirfid); | |
2bad8471 | 691 | |
bd238fb4 LI |
692 | clunk_olddir: |
693 | p9_client_clunk(newdirfid); | |
da977b2c | 694 | |
bd238fb4 | 695 | done: |
2bad8471 EVH |
696 | return retval; |
697 | } | |
698 | ||
699 | /** | |
943ffb58 | 700 | * v9fs_vfs_getattr - retrieve file metadata |
2bad8471 EVH |
701 | * @mnt - mount information |
702 | * @dentry - file to get attributes on | |
703 | * @stat - metadata structure to populate | |
704 | * | |
705 | */ | |
706 | ||
707 | static int | |
708 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
709 | struct kstat *stat) | |
710 | { | |
bd238fb4 LI |
711 | int err; |
712 | struct v9fs_session_info *v9ses; | |
713 | struct p9_fid *fid; | |
714 | struct p9_stat *st; | |
715 | ||
716 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
717 | err = -EPERM; | |
718 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
9523a841 EVH |
719 | if (v9ses->cache == CACHE_LOOSE) |
720 | return simple_getattr(mnt, dentry, stat); | |
721 | ||
bd238fb4 LI |
722 | fid = v9fs_fid_lookup(dentry); |
723 | if (IS_ERR(fid)) | |
da977b2c | 724 | return PTR_ERR(fid); |
2bad8471 | 725 | |
bd238fb4 LI |
726 | st = p9_client_stat(fid); |
727 | if (IS_ERR(st)) | |
728 | return PTR_ERR(st); | |
2bad8471 | 729 | |
bd238fb4 | 730 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
2bad8471 | 731 | generic_fillattr(dentry->d_inode, stat); |
2bad8471 | 732 | |
bd238fb4 LI |
733 | kfree(st); |
734 | return 0; | |
2bad8471 EVH |
735 | } |
736 | ||
737 | /** | |
738 | * v9fs_vfs_setattr - set file metadata | |
739 | * @dentry: file whose metadata to set | |
740 | * @iattr: metadata assignment structure | |
741 | * | |
742 | */ | |
743 | ||
744 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
745 | { | |
bd238fb4 LI |
746 | int retval; |
747 | struct v9fs_session_info *v9ses; | |
748 | struct p9_fid *fid; | |
749 | struct p9_wstat wstat; | |
2bad8471 | 750 | |
bd238fb4 LI |
751 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
752 | retval = -EPERM; | |
753 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
754 | fid = v9fs_fid_lookup(dentry); | |
da977b2c EVH |
755 | if(IS_ERR(fid)) |
756 | return PTR_ERR(fid); | |
2bad8471 | 757 | |
531b1094 | 758 | v9fs_blank_wstat(&wstat); |
2bad8471 | 759 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 760 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
761 | |
762 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 763 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
764 | |
765 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 766 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
767 | |
768 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 769 | wstat.length = iattr->ia_size; |
2bad8471 | 770 | |
2405669b | 771 | if (v9fs_extended(v9ses)) { |
531b1094 LI |
772 | if (iattr->ia_valid & ATTR_UID) |
773 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 774 | |
531b1094 LI |
775 | if (iattr->ia_valid & ATTR_GID) |
776 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 EVH |
777 | } |
778 | ||
bd238fb4 LI |
779 | retval = p9_client_wstat(fid, &wstat); |
780 | if (retval >= 0) | |
781 | retval = inode_setattr(dentry->d_inode, iattr); | |
2bad8471 | 782 | |
bd238fb4 | 783 | return retval; |
2bad8471 EVH |
784 | } |
785 | ||
786 | /** | |
531b1094 LI |
787 | * v9fs_stat2inode - populate an inode structure with mistat info |
788 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
789 | * @inode: inode to populate |
790 | * @sb: superblock of filesystem | |
791 | * | |
792 | */ | |
793 | ||
794 | void | |
bd238fb4 | 795 | v9fs_stat2inode(struct p9_stat *stat, struct inode *inode, |
531b1094 | 796 | struct super_block *sb) |
2bad8471 | 797 | { |
1dac06b2 | 798 | int n; |
531b1094 | 799 | char ext[32]; |
2bad8471 EVH |
800 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
801 | ||
802 | inode->i_nlink = 1; | |
803 | ||
531b1094 LI |
804 | inode->i_atime.tv_sec = stat->atime; |
805 | inode->i_mtime.tv_sec = stat->mtime; | |
806 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 807 | |
531b1094 LI |
808 | inode->i_uid = v9ses->uid; |
809 | inode->i_gid = v9ses->gid; | |
2bad8471 | 810 | |
2405669b | 811 | if (v9fs_extended(v9ses)) { |
531b1094 LI |
812 | inode->i_uid = stat->n_uid; |
813 | inode->i_gid = stat->n_gid; | |
2bad8471 EVH |
814 | } |
815 | ||
531b1094 | 816 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
2bad8471 EVH |
817 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
818 | char type = 0; | |
819 | int major = -1; | |
820 | int minor = -1; | |
531b1094 | 821 | |
1dac06b2 LI |
822 | n = stat->extension.len; |
823 | if (n > sizeof(ext)-1) | |
824 | n = sizeof(ext)-1; | |
825 | memmove(ext, stat->extension.str, n); | |
826 | ext[n] = 0; | |
531b1094 | 827 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
2bad8471 EVH |
828 | switch (type) { |
829 | case 'c': | |
830 | inode->i_mode &= ~S_IFBLK; | |
831 | inode->i_mode |= S_IFCHR; | |
832 | break; | |
833 | case 'b': | |
834 | break; | |
835 | default: | |
bd238fb4 LI |
836 | P9_DPRINTK(P9_DEBUG_ERROR, |
837 | "Unknown special type %c (%.*s)\n", type, | |
838 | stat->extension.len, stat->extension.str); | |
2bad8471 EVH |
839 | }; |
840 | inode->i_rdev = MKDEV(major, minor); | |
841 | } else | |
842 | inode->i_rdev = 0; | |
843 | ||
531b1094 | 844 | inode->i_size = stat->length; |
2bad8471 | 845 | |
bd238fb4 LI |
846 | /* not real number of blocks, but 512 byte ones ... */ |
847 | inode->i_blocks = (inode->i_size + 512 - 1) >> 9; | |
2bad8471 EVH |
848 | } |
849 | ||
850 | /** | |
851 | * v9fs_qid2ino - convert qid into inode number | |
852 | * @qid: qid to hash | |
853 | * | |
854 | * BUG: potential for inode number collisions? | |
855 | */ | |
856 | ||
bd238fb4 | 857 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
858 | { |
859 | u64 path = qid->path + 2; | |
860 | ino_t i = 0; | |
861 | ||
862 | if (sizeof(ino_t) == sizeof(path)) | |
863 | memcpy(&i, &path, sizeof(ino_t)); | |
864 | else | |
865 | i = (ino_t) (path ^ (path >> 32)); | |
866 | ||
867 | return i; | |
868 | } | |
869 | ||
2bad8471 EVH |
870 | /** |
871 | * v9fs_readlink - read a symlink's location (internal version) | |
872 | * @dentry: dentry for symlink | |
73c592b9 | 873 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
874 | * @buflen: length of buffer |
875 | * | |
876 | */ | |
877 | ||
878 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
879 | { | |
bd238fb4 | 880 | int retval; |
2bad8471 | 881 | |
bd238fb4 LI |
882 | struct v9fs_session_info *v9ses; |
883 | struct p9_fid *fid; | |
884 | struct p9_stat *st; | |
2bad8471 | 885 | |
bd238fb4 LI |
886 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
887 | retval = -EPERM; | |
888 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
889 | fid = v9fs_fid_lookup(dentry); | |
da977b2c EVH |
890 | if(IS_ERR(fid)) |
891 | return PTR_ERR(fid); | |
2bad8471 | 892 | |
2405669b | 893 | if (!v9fs_extended(v9ses)) |
bd238fb4 | 894 | return -EBADF; |
2bad8471 | 895 | |
bd238fb4 LI |
896 | st = p9_client_stat(fid); |
897 | if (IS_ERR(st)) | |
898 | return PTR_ERR(st); | |
2bad8471 | 899 | |
bd238fb4 | 900 | if (!(st->mode & P9_DMSYMLINK)) { |
2bad8471 | 901 | retval = -EINVAL; |
bd238fb4 | 902 | goto done; |
2bad8471 EVH |
903 | } |
904 | ||
905 | /* copy extension buffer into buffer */ | |
bd238fb4 LI |
906 | if (st->extension.len < buflen) |
907 | buflen = st->extension.len + 1; | |
2bad8471 | 908 | |
bd238fb4 | 909 | memmove(buffer, st->extension.str, buflen - 1); |
531b1094 | 910 | buffer[buflen-1] = 0; |
2bad8471 | 911 | |
bd238fb4 LI |
912 | P9_DPRINTK(P9_DEBUG_VFS, |
913 | "%s -> %.*s (%s)\n", dentry->d_name.name, st->extension.len, | |
914 | st->extension.str, buffer); | |
2bad8471 | 915 | |
bd238fb4 | 916 | retval = buflen; |
da977b2c | 917 | |
bd238fb4 LI |
918 | done: |
919 | kfree(st); | |
2bad8471 EVH |
920 | return retval; |
921 | } | |
922 | ||
923 | /** | |
924 | * v9fs_vfs_readlink - read a symlink's location | |
925 | * @dentry: dentry for symlink | |
926 | * @buf: buffer to load symlink location into | |
927 | * @buflen: length of buffer | |
928 | * | |
929 | */ | |
930 | ||
931 | static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, | |
932 | int buflen) | |
933 | { | |
934 | int retval; | |
935 | int ret; | |
936 | char *link = __getname(); | |
937 | ||
0710d36a FM |
938 | if (unlikely(!link)) |
939 | return -ENOMEM; | |
940 | ||
a1f9d8d2 LI |
941 | if (buflen > PATH_MAX) |
942 | buflen = PATH_MAX; | |
2bad8471 | 943 | |
bd238fb4 | 944 | P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); |
2bad8471 EVH |
945 | |
946 | retval = v9fs_readlink(dentry, link, buflen); | |
947 | ||
948 | if (retval > 0) { | |
949 | if ((ret = copy_to_user(buffer, link, retval)) != 0) { | |
bd238fb4 LI |
950 | P9_DPRINTK(P9_DEBUG_ERROR, |
951 | "problem copying to user: %d\n", ret); | |
2bad8471 EVH |
952 | retval = ret; |
953 | } | |
954 | } | |
955 | ||
ce44eeb6 | 956 | __putname(link); |
2bad8471 EVH |
957 | return retval; |
958 | } | |
959 | ||
960 | /** | |
961 | * v9fs_vfs_follow_link - follow a symlink path | |
962 | * @dentry: dentry for symlink | |
963 | * @nd: nameidata | |
964 | * | |
965 | */ | |
966 | ||
967 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
968 | { | |
969 | int len = 0; | |
970 | char *link = __getname(); | |
971 | ||
bd238fb4 | 972 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
2bad8471 EVH |
973 | |
974 | if (!link) | |
975 | link = ERR_PTR(-ENOMEM); | |
976 | else { | |
16cce6d2 | 977 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
978 | |
979 | if (len < 0) { | |
ce44eeb6 | 980 | __putname(link); |
2bad8471 EVH |
981 | link = ERR_PTR(len); |
982 | } else | |
983 | link[len] = 0; | |
984 | } | |
985 | nd_set_link(nd, link); | |
986 | ||
987 | return NULL; | |
988 | } | |
989 | ||
990 | /** | |
991 | * v9fs_vfs_put_link - release a symlink path | |
992 | * @dentry: dentry for symlink | |
993 | * @nd: nameidata | |
994 | * | |
995 | */ | |
996 | ||
997 | static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) | |
998 | { | |
999 | char *s = nd_get_link(nd); | |
1000 | ||
bd238fb4 | 1001 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); |
2bad8471 | 1002 | if (!IS_ERR(s)) |
ce44eeb6 | 1003 | __putname(s); |
2bad8471 EVH |
1004 | } |
1005 | ||
531b1094 LI |
1006 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
1007 | int mode, const char *extension) | |
2bad8471 | 1008 | { |
bd238fb4 | 1009 | u32 perm; |
531b1094 | 1010 | struct v9fs_session_info *v9ses; |
bd238fb4 | 1011 | struct p9_fid *fid; |
2bad8471 | 1012 | |
6a3124a3 | 1013 | v9ses = v9fs_inode2v9ses(dir); |
2405669b | 1014 | if (!v9fs_extended(v9ses)) { |
bd238fb4 | 1015 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1016 | return -EPERM; |
2bad8471 EVH |
1017 | } |
1018 | ||
da977b2c | 1019 | perm = unixmode2p9mode(v9ses, mode); |
bd238fb4 LI |
1020 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1021 | P9_OREAD); | |
1022 | if (IS_ERR(fid)) | |
1023 | return PTR_ERR(fid); | |
da977b2c | 1024 | |
bd238fb4 | 1025 | p9_client_clunk(fid); |
6a3124a3 | 1026 | return 0; |
531b1094 LI |
1027 | } |
1028 | ||
1029 | /** | |
1030 | * v9fs_vfs_symlink - helper function to create symlinks | |
1031 | * @dir: directory inode containing symlink | |
1032 | * @dentry: dentry for symlink | |
1033 | * @symname: symlink data | |
1034 | * | |
1035 | * See 9P2000.u RFC for more information | |
1036 | * | |
1037 | */ | |
1038 | ||
1039 | static int | |
1040 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1041 | { | |
bd238fb4 LI |
1042 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
1043 | dentry->d_name.name, symname); | |
531b1094 LI |
1044 | |
1045 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); | |
1046 | } | |
1047 | ||
1048 | /** | |
1049 | * v9fs_vfs_link - create a hardlink | |
1050 | * @old_dentry: dentry for file to link to | |
1051 | * @dir: inode destination for new link | |
1052 | * @dentry: dentry for link | |
1053 | * | |
1054 | */ | |
1055 | ||
1056 | /* XXX - lots of code dup'd from symlink and creates, | |
1057 | * figure out a better reuse strategy | |
1058 | */ | |
1059 | ||
1060 | static int | |
1061 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1062 | struct dentry *dentry) | |
1063 | { | |
1064 | int retval; | |
bd238fb4 | 1065 | struct p9_fid *oldfid; |
531b1094 LI |
1066 | char *name; |
1067 | ||
bd238fb4 LI |
1068 | P9_DPRINTK(P9_DEBUG_VFS, |
1069 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
531b1094 LI |
1070 | old_dentry->d_name.name); |
1071 | ||
da977b2c EVH |
1072 | oldfid = v9fs_fid_clone(old_dentry); |
1073 | if(IS_ERR(oldfid)) | |
1074 | return PTR_ERR(oldfid); | |
531b1094 LI |
1075 | |
1076 | name = __getname(); | |
da977b2c EVH |
1077 | if (unlikely(!name)) { |
1078 | retval = -ENOMEM; | |
1079 | goto clunk_fid; | |
1080 | } | |
0710d36a | 1081 | |
16cce6d2 | 1082 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1083 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
531b1094 | 1084 | __putname(name); |
2bad8471 | 1085 | |
da977b2c | 1086 | clunk_fid: |
bd238fb4 | 1087 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1088 | return retval; |
1089 | } | |
1090 | ||
1091 | /** | |
1092 | * v9fs_vfs_mknod - create a special file | |
1093 | * @dir: inode destination for new link | |
1094 | * @dentry: dentry for file | |
1095 | * @mode: mode for creation | |
1096 | * @dev_t: device associated with special file | |
1097 | * | |
1098 | */ | |
1099 | ||
1100 | static int | |
1101 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |
1102 | { | |
531b1094 LI |
1103 | int retval; |
1104 | char *name; | |
2bad8471 | 1105 | |
bd238fb4 LI |
1106 | P9_DPRINTK(P9_DEBUG_VFS, |
1107 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
2bad8471 EVH |
1108 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
1109 | ||
531b1094 LI |
1110 | if (!new_valid_dev(rdev)) |
1111 | return -EINVAL; | |
2bad8471 | 1112 | |
531b1094 | 1113 | name = __getname(); |
c0291a05 ET |
1114 | if (!name) |
1115 | return -ENOMEM; | |
2bad8471 EVH |
1116 | /* build extension */ |
1117 | if (S_ISBLK(mode)) | |
531b1094 | 1118 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1119 | else if (S_ISCHR(mode)) |
531b1094 | 1120 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1121 | else if (S_ISFIFO(mode)) |
531b1094 | 1122 | *name = 0; |
2bad8471 | 1123 | else { |
531b1094 LI |
1124 | __putname(name); |
1125 | return -EINVAL; | |
2bad8471 EVH |
1126 | } |
1127 | ||
531b1094 LI |
1128 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1129 | __putname(name); | |
2bad8471 EVH |
1130 | |
1131 | return retval; | |
1132 | } | |
1133 | ||
754661f1 | 1134 | static const struct inode_operations v9fs_dir_inode_operations_ext = { |
2bad8471 EVH |
1135 | .create = v9fs_vfs_create, |
1136 | .lookup = v9fs_vfs_lookup, | |
1137 | .symlink = v9fs_vfs_symlink, | |
1138 | .link = v9fs_vfs_link, | |
1139 | .unlink = v9fs_vfs_unlink, | |
1140 | .mkdir = v9fs_vfs_mkdir, | |
1141 | .rmdir = v9fs_vfs_rmdir, | |
1142 | .mknod = v9fs_vfs_mknod, | |
1143 | .rename = v9fs_vfs_rename, | |
1144 | .readlink = v9fs_vfs_readlink, | |
1145 | .getattr = v9fs_vfs_getattr, | |
1146 | .setattr = v9fs_vfs_setattr, | |
1147 | }; | |
1148 | ||
754661f1 | 1149 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1150 | .create = v9fs_vfs_create, |
1151 | .lookup = v9fs_vfs_lookup, | |
1152 | .unlink = v9fs_vfs_unlink, | |
1153 | .mkdir = v9fs_vfs_mkdir, | |
1154 | .rmdir = v9fs_vfs_rmdir, | |
1155 | .mknod = v9fs_vfs_mknod, | |
1156 | .rename = v9fs_vfs_rename, | |
1157 | .getattr = v9fs_vfs_getattr, | |
1158 | .setattr = v9fs_vfs_setattr, | |
1159 | }; | |
1160 | ||
754661f1 | 1161 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1162 | .getattr = v9fs_vfs_getattr, |
1163 | .setattr = v9fs_vfs_setattr, | |
1164 | }; | |
1165 | ||
754661f1 | 1166 | static const struct inode_operations v9fs_symlink_inode_operations = { |
2bad8471 EVH |
1167 | .readlink = v9fs_vfs_readlink, |
1168 | .follow_link = v9fs_vfs_follow_link, | |
1169 | .put_link = v9fs_vfs_put_link, | |
1170 | .getattr = v9fs_vfs_getattr, | |
1171 | .setattr = v9fs_vfs_setattr, | |
1172 | }; |