Commit | Line | Data |
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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> | |
33 | #include <linux/smp_lock.h> | |
34 | #include <linux/inet.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/idr.h> | |
37 | ||
38 | #include "debug.h" | |
39 | #include "v9fs.h" | |
40 | #include "9p.h" | |
41 | #include "v9fs_vfs.h" | |
2bad8471 EVH |
42 | #include "fid.h" |
43 | ||
44 | static struct inode_operations v9fs_dir_inode_operations; | |
b501611a | 45 | static struct inode_operations v9fs_dir_inode_operations_ext; |
2bad8471 EVH |
46 | static struct inode_operations v9fs_file_inode_operations; |
47 | static struct inode_operations v9fs_symlink_inode_operations; | |
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)) | |
61 | res |= V9FS_DMDIR; | |
62 | if (v9ses->extended) { | |
63 | if (S_ISLNK(mode)) | |
64 | res |= V9FS_DMSYMLINK; | |
65 | if (v9ses->nodev == 0) { | |
66 | if (S_ISSOCK(mode)) | |
67 | res |= V9FS_DMSOCKET; | |
68 | if (S_ISFIFO(mode)) | |
69 | res |= V9FS_DMNAMEDPIPE; | |
70 | if (S_ISBLK(mode)) | |
71 | res |= V9FS_DMDEVICE; | |
72 | if (S_ISCHR(mode)) | |
73 | res |= V9FS_DMDEVICE; | |
74 | } | |
75 | ||
76 | if ((mode & S_ISUID) == S_ISUID) | |
77 | res |= V9FS_DMSETUID; | |
78 | if ((mode & S_ISGID) == S_ISGID) | |
79 | res |= V9FS_DMSETGID; | |
80 | if ((mode & V9FS_DMLINK)) | |
81 | res |= V9FS_DMLINK; | |
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 | ||
100 | if ((mode & V9FS_DMDIR) == V9FS_DMDIR) | |
101 | res |= S_IFDIR; | |
102 | else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended)) | |
103 | res |= S_IFLNK; | |
104 | else if ((mode & V9FS_DMSOCKET) && (v9ses->extended) | |
105 | && (v9ses->nodev == 0)) | |
106 | res |= S_IFSOCK; | |
107 | else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended) | |
108 | && (v9ses->nodev == 0)) | |
109 | res |= S_IFIFO; | |
110 | else if ((mode & V9FS_DMDEVICE) && (v9ses->extended) | |
111 | && (v9ses->nodev == 0)) | |
112 | res |= S_IFBLK; | |
113 | else | |
114 | res |= S_IFREG; | |
115 | ||
116 | if (v9ses->extended) { | |
117 | if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID) | |
118 | res |= S_ISUID; | |
119 | ||
120 | if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID) | |
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: | |
135 | ret = V9FS_OREAD; | |
136 | break; | |
137 | ||
138 | case O_WRONLY: | |
139 | ret = V9FS_OWRITE; | |
140 | break; | |
141 | ||
142 | case O_RDWR: | |
143 | ret = V9FS_ORDWR; | |
144 | break; | |
145 | } | |
146 | ||
147 | if (uflags & O_EXCL) | |
148 | ret |= V9FS_OEXCL; | |
149 | ||
150 | if (uflags & O_TRUNC) | |
151 | ret |= V9FS_OTRUNC; | |
152 | ||
153 | if (uflags & O_APPEND) | |
154 | ret |= V9FS_OAPPEND; | |
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 |
531b1094 | 167 | v9fs_blank_wstat(struct v9fs_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 EVH |
199 | |
200 | dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); | |
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; | |
207 | inode->i_blksize = sb->s_blocksize; | |
208 | inode->i_blocks = 0; | |
209 | inode->i_rdev = 0; | |
210 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
147b31cf | 211 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
2bad8471 EVH |
212 | |
213 | switch (mode & S_IFMT) { | |
214 | case S_IFIFO: | |
215 | case S_IFBLK: | |
216 | case S_IFCHR: | |
217 | case S_IFSOCK: | |
b501611a EVH |
218 | if(!v9ses->extended) { |
219 | dprintk(DEBUG_ERROR, "special files without extended mode\n"); | |
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 EVH |
229 | case S_IFLNK: |
230 | if(!v9ses->extended) { | |
231 | dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n"); | |
232 | return ERR_PTR(-EINVAL); | |
233 | } | |
234 | inode->i_op = &v9fs_symlink_inode_operations; | |
235 | break; | |
2bad8471 EVH |
236 | case S_IFDIR: |
237 | inode->i_nlink++; | |
b501611a EVH |
238 | if(v9ses->extended) |
239 | inode->i_op = &v9fs_dir_inode_operations_ext; | |
240 | else | |
241 | inode->i_op = &v9fs_dir_inode_operations; | |
2bad8471 EVH |
242 | inode->i_fop = &v9fs_dir_operations; |
243 | break; | |
2bad8471 EVH |
244 | default: |
245 | dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", | |
246 | mode, mode & S_IFMT); | |
247 | return ERR_PTR(-EINVAL); | |
248 | } | |
249 | } else { | |
250 | eprintk(KERN_WARNING, "Problem allocating inode\n"); | |
251 | return ERR_PTR(-ENOMEM); | |
252 | } | |
253 | return inode; | |
254 | } | |
255 | ||
2bad8471 | 256 | static int |
16cce6d2 LI |
257 | v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm, |
258 | u8 mode, char *extension, u32 *fidp, struct v9fs_qid *qid, u32 *iounit) | |
2bad8471 | 259 | { |
6a3124a3 | 260 | u32 fid; |
3cf6429a | 261 | int err; |
6a3124a3 | 262 | struct v9fs_fcall *fcall; |
2bad8471 | 263 | |
6a3124a3 LI |
264 | fid = v9fs_get_idpool(&v9ses->fidpool); |
265 | if (fid < 0) { | |
2bad8471 | 266 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 267 | return -ENOSPC; |
2bad8471 EVH |
268 | } |
269 | ||
6a3124a3 LI |
270 | err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall); |
271 | if (err < 0) { | |
531b1094 | 272 | PRINT_FCALL_ERROR("clone error", fcall); |
16cce6d2 | 273 | goto put_fid; |
2bad8471 | 274 | } |
2bad8471 EVH |
275 | kfree(fcall); |
276 | ||
16cce6d2 | 277 | err = v9fs_t_create(v9ses, fid, name, perm, mode, extension, &fcall); |
6a3124a3 | 278 | if (err < 0) { |
531b1094 | 279 | PRINT_FCALL_ERROR("create fails", fcall); |
16cce6d2 | 280 | goto clunk_fid; |
2bad8471 EVH |
281 | } |
282 | ||
6a3124a3 LI |
283 | if (iounit) |
284 | *iounit = fcall->params.rcreate.iounit; | |
285 | ||
286 | if (qid) | |
287 | *qid = fcall->params.rcreate.qid; | |
288 | ||
289 | if (fidp) | |
290 | *fidp = fid; | |
291 | ||
2bad8471 | 292 | kfree(fcall); |
6a3124a3 | 293 | return 0; |
2bad8471 | 294 | |
16cce6d2 LI |
295 | clunk_fid: |
296 | v9fs_t_clunk(v9ses, fid); | |
297 | fid = V9FS_NOFID; | |
298 | ||
299 | put_fid: | |
6a3124a3 LI |
300 | if (fid >= 0) |
301 | v9fs_put_idpool(fid, &v9ses->fidpool); | |
2bad8471 | 302 | |
6a3124a3 LI |
303 | kfree(fcall); |
304 | return err; | |
305 | } | |
0b8dd177 | 306 | |
6a3124a3 LI |
307 | static struct v9fs_fid* |
308 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) | |
309 | { | |
310 | int err; | |
311 | u32 nfid; | |
312 | struct v9fs_fid *ret; | |
313 | struct v9fs_fcall *fcall; | |
314 | ||
315 | nfid = v9fs_get_idpool(&v9ses->fidpool); | |
316 | if (nfid < 0) { | |
0b8dd177 | 317 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 318 | return ERR_PTR(-ENOSPC); |
0b8dd177 LI |
319 | } |
320 | ||
6a3124a3 LI |
321 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
322 | &fcall); | |
323 | ||
324 | if (err < 0) { | |
325 | PRINT_FCALL_ERROR("walk error", fcall); | |
326 | v9fs_put_idpool(nfid, &v9ses->fidpool); | |
327 | goto error; | |
0b8dd177 | 328 | } |
6a3124a3 | 329 | |
3cf6429a LI |
330 | kfree(fcall); |
331 | fcall = NULL; | |
6a3124a3 LI |
332 | ret = v9fs_fid_create(v9ses, nfid); |
333 | if (!ret) { | |
334 | err = -ENOMEM; | |
335 | goto clunk_fid; | |
336 | } | |
0b8dd177 | 337 | |
6a3124a3 LI |
338 | err = v9fs_fid_insert(ret, dentry); |
339 | if (err < 0) { | |
340 | v9fs_fid_destroy(ret); | |
341 | goto clunk_fid; | |
0b8dd177 | 342 | } |
2bad8471 | 343 | |
6a3124a3 | 344 | return ret; |
2bad8471 | 345 | |
6a3124a3 LI |
346 | clunk_fid: |
347 | v9fs_t_clunk(v9ses, nfid); | |
2bad8471 | 348 | |
6a3124a3 LI |
349 | error: |
350 | kfree(fcall); | |
351 | return ERR_PTR(err); | |
352 | } | |
2bad8471 | 353 | |
5174fdab | 354 | static struct inode * |
6a3124a3 LI |
355 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid, |
356 | struct super_block *sb) | |
357 | { | |
358 | int err, umode; | |
359 | struct inode *ret; | |
360 | struct v9fs_fcall *fcall; | |
531b1094 | 361 | |
6a3124a3 LI |
362 | ret = NULL; |
363 | err = v9fs_t_stat(v9ses, fid, &fcall); | |
364 | if (err) { | |
365 | PRINT_FCALL_ERROR("stat error", fcall); | |
366 | goto error; | |
2bad8471 EVH |
367 | } |
368 | ||
6a3124a3 LI |
369 | umode = p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode); |
370 | ret = v9fs_get_inode(sb, umode); | |
371 | if (IS_ERR(ret)) { | |
372 | err = PTR_ERR(ret); | |
373 | ret = NULL; | |
374 | goto error; | |
375 | } | |
2bad8471 | 376 | |
6a3124a3 LI |
377 | v9fs_stat2inode(&fcall->params.rstat.stat, ret, sb); |
378 | kfree(fcall); | |
379 | return ret; | |
2bad8471 | 380 | |
6a3124a3 | 381 | error: |
2bad8471 | 382 | kfree(fcall); |
6a3124a3 LI |
383 | if (ret) |
384 | iput(ret); | |
2bad8471 | 385 | |
6a3124a3 | 386 | return ERR_PTR(err); |
2bad8471 EVH |
387 | } |
388 | ||
389 | /** | |
390 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 EVH |
391 | * @dir: directory inode that is being deleted |
392 | * @file: dentry that is being deleted | |
393 | * @rmdir: removing a directory | |
2bad8471 EVH |
394 | * |
395 | */ | |
396 | ||
397 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) | |
398 | { | |
399 | struct v9fs_fcall *fcall = NULL; | |
400 | struct super_block *sb = NULL; | |
401 | struct v9fs_session_info *v9ses = NULL; | |
402 | struct v9fs_fid *v9fid = NULL; | |
403 | struct inode *file_inode = NULL; | |
404 | int fid = -1; | |
405 | int result = 0; | |
406 | ||
407 | dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, | |
408 | rmdir); | |
409 | ||
410 | file_inode = file->d_inode; | |
411 | sb = file_inode->i_sb; | |
412 | v9ses = v9fs_inode2v9ses(file_inode); | |
0b8dd177 | 413 | v9fid = v9fs_fid_lookup(file); |
2bad8471 EVH |
414 | |
415 | if (!v9fid) { | |
416 | dprintk(DEBUG_ERROR, | |
417 | "no v9fs_fid\n"); | |
418 | return -EBADF; | |
419 | } | |
420 | ||
421 | fid = v9fid->fid; | |
422 | if (fid < 0) { | |
423 | dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n", | |
424 | file_inode->i_ino); | |
425 | return -EBADF; | |
426 | } | |
427 | ||
428 | result = v9fs_t_remove(v9ses, fid, &fcall); | |
531b1094 LI |
429 | if (result < 0) { |
430 | PRINT_FCALL_ERROR("remove fails", fcall); | |
431 | } else { | |
2bad8471 EVH |
432 | v9fs_put_idpool(fid, &v9ses->fidpool); |
433 | v9fs_fid_destroy(v9fid); | |
434 | } | |
435 | ||
436 | kfree(fcall); | |
437 | return result; | |
438 | } | |
439 | ||
6a3124a3 LI |
440 | static int |
441 | v9fs_open_created(struct inode *inode, struct file *file) | |
442 | { | |
443 | return 0; | |
444 | } | |
445 | ||
2bad8471 EVH |
446 | /** |
447 | * v9fs_vfs_create - VFS hook to create files | |
448 | * @inode: directory inode that is being deleted | |
449 | * @dentry: dentry that is being deleted | |
6a3124a3 | 450 | * @mode: create permissions |
2bad8471 EVH |
451 | * @nd: path information |
452 | * | |
453 | */ | |
454 | ||
455 | static int | |
6a3124a3 | 456 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, |
2bad8471 EVH |
457 | struct nameidata *nd) |
458 | { | |
6a3124a3 LI |
459 | int err; |
460 | u32 fid, perm, iounit; | |
461 | int flags; | |
462 | struct v9fs_session_info *v9ses; | |
463 | struct v9fs_fid *dfid, *vfid, *ffid; | |
464 | struct inode *inode; | |
465 | struct v9fs_qid qid; | |
466 | struct file *filp; | |
467 | ||
468 | inode = NULL; | |
469 | vfid = NULL; | |
470 | v9ses = v9fs_inode2v9ses(dir); | |
471 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
472 | perm = unixmode2p9mode(v9ses, mode); | |
473 | ||
474 | if (nd && nd->flags & LOOKUP_OPEN) | |
475 | flags = nd->intent.open.flags - 1; | |
476 | else | |
477 | flags = O_RDWR; | |
478 | ||
479 | err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, | |
16cce6d2 | 480 | perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit); |
6a3124a3 LI |
481 | |
482 | if (err) | |
483 | goto error; | |
484 | ||
485 | vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); | |
486 | if (IS_ERR(vfid)) { | |
487 | err = PTR_ERR(vfid); | |
488 | vfid = NULL; | |
489 | goto error; | |
490 | } | |
491 | ||
492 | inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); | |
493 | if (IS_ERR(inode)) { | |
494 | err = PTR_ERR(inode); | |
495 | inode = NULL; | |
496 | goto error; | |
497 | } | |
498 | ||
499 | dentry->d_op = &v9fs_dentry_operations; | |
500 | d_instantiate(dentry, inode); | |
501 | ||
502 | if (nd && nd->flags & LOOKUP_OPEN) { | |
503 | ffid = v9fs_fid_create(v9ses, fid); | |
504 | if (!ffid) | |
505 | return -ENOMEM; | |
506 | ||
507 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); | |
508 | if (IS_ERR(filp)) { | |
509 | v9fs_fid_destroy(ffid); | |
510 | return PTR_ERR(filp); | |
511 | } | |
512 | ||
513 | ffid->rdir_pos = 0; | |
514 | ffid->rdir_fcall = NULL; | |
515 | ffid->fidopen = 1; | |
516 | ffid->iounit = iounit; | |
517 | ffid->filp = filp; | |
518 | filp->private_data = ffid; | |
519 | } | |
520 | ||
521 | return 0; | |
522 | ||
523 | error: | |
524 | if (vfid) | |
525 | v9fs_fid_destroy(vfid); | |
526 | ||
527 | if (inode) | |
528 | iput(inode); | |
529 | ||
530 | return err; | |
2bad8471 EVH |
531 | } |
532 | ||
533 | /** | |
534 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
73c592b9 | 535 | * @inode: inode that is being unlinked |
2bad8471 EVH |
536 | * @dentry: dentry that is being unlinked |
537 | * @mode: mode for new directory | |
538 | * | |
539 | */ | |
540 | ||
6a3124a3 | 541 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
2bad8471 | 542 | { |
6a3124a3 LI |
543 | int err; |
544 | u32 fid, perm; | |
545 | struct v9fs_session_info *v9ses; | |
546 | struct v9fs_fid *dfid, *vfid; | |
547 | struct inode *inode; | |
548 | ||
549 | inode = NULL; | |
550 | vfid = NULL; | |
551 | v9ses = v9fs_inode2v9ses(dir); | |
552 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
553 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); | |
554 | ||
555 | err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, | |
16cce6d2 | 556 | perm, V9FS_OREAD, NULL, &fid, NULL, NULL); |
6a3124a3 LI |
557 | |
558 | if (err) { | |
559 | dprintk(DEBUG_ERROR, "create error %d\n", err); | |
560 | goto error; | |
561 | } | |
562 | ||
563 | err = v9fs_t_clunk(v9ses, fid); | |
564 | if (err) { | |
565 | dprintk(DEBUG_ERROR, "clunk error %d\n", err); | |
566 | goto error; | |
567 | } | |
568 | ||
569 | vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); | |
570 | if (IS_ERR(vfid)) { | |
571 | err = PTR_ERR(vfid); | |
572 | vfid = NULL; | |
573 | goto error; | |
574 | } | |
575 | ||
576 | inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); | |
577 | if (IS_ERR(inode)) { | |
578 | err = PTR_ERR(inode); | |
579 | inode = NULL; | |
580 | goto error; | |
581 | } | |
582 | ||
583 | dentry->d_op = &v9fs_dentry_operations; | |
584 | d_instantiate(dentry, inode); | |
585 | return 0; | |
586 | ||
587 | error: | |
588 | if (vfid) | |
589 | v9fs_fid_destroy(vfid); | |
590 | ||
591 | return err; | |
2bad8471 EVH |
592 | } |
593 | ||
594 | /** | |
595 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
596 | * @dir: inode that is being walked from | |
597 | * @dentry: dentry that is being walked to? | |
598 | * @nameidata: path data | |
599 | * | |
600 | */ | |
601 | ||
602 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, | |
603 | struct nameidata *nameidata) | |
604 | { | |
605 | struct super_block *sb; | |
606 | struct v9fs_session_info *v9ses; | |
607 | struct v9fs_fid *dirfid; | |
608 | struct v9fs_fid *fid; | |
609 | struct inode *inode; | |
610 | struct v9fs_fcall *fcall = NULL; | |
2bad8471 EVH |
611 | int dirfidnum = -1; |
612 | int newfid = -1; | |
613 | int result = 0; | |
614 | ||
615 | dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", | |
731805b4 | 616 | dir, dentry->d_name.name, dentry, nameidata); |
2bad8471 EVH |
617 | |
618 | sb = dir->i_sb; | |
619 | v9ses = v9fs_inode2v9ses(dir); | |
5e7a99ac | 620 | dentry->d_op = &v9fs_dentry_operations; |
0b8dd177 | 621 | dirfid = v9fs_fid_lookup(dentry->d_parent); |
2bad8471 EVH |
622 | |
623 | if (!dirfid) { | |
624 | dprintk(DEBUG_ERROR, "no dirfid\n"); | |
625 | return ERR_PTR(-EINVAL); | |
626 | } | |
627 | ||
628 | dirfidnum = dirfid->fid; | |
629 | ||
630 | if (dirfidnum < 0) { | |
631 | dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n", | |
632 | dir, dir->i_ino); | |
633 | return ERR_PTR(-EBADF); | |
634 | } | |
635 | ||
636 | newfid = v9fs_get_idpool(&v9ses->fidpool); | |
637 | if (newfid < 0) { | |
638 | eprintk(KERN_WARNING, "newfid fails!\n"); | |
639 | return ERR_PTR(-ENOSPC); | |
640 | } | |
641 | ||
6a3124a3 LI |
642 | result = v9fs_t_walk(v9ses, dirfidnum, newfid, |
643 | (char *)dentry->d_name.name, NULL); | |
2bad8471 EVH |
644 | if (result < 0) { |
645 | v9fs_put_idpool(newfid, &v9ses->fidpool); | |
646 | if (result == -ENOENT) { | |
647 | d_add(dentry, NULL); | |
0b8dd177 | 648 | dprintk(DEBUG_VFS, |
2bad8471 EVH |
649 | "Return negative dentry %p count %d\n", |
650 | dentry, atomic_read(&dentry->d_count)); | |
651 | return NULL; | |
652 | } | |
653 | dprintk(DEBUG_ERROR, "walk error:%d\n", result); | |
654 | goto FreeFcall; | |
655 | } | |
656 | ||
657 | result = v9fs_t_stat(v9ses, newfid, &fcall); | |
658 | if (result < 0) { | |
659 | dprintk(DEBUG_ERROR, "stat error\n"); | |
660 | goto FreeFcall; | |
661 | } | |
662 | ||
531b1094 LI |
663 | inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses, |
664 | fcall->params.rstat.stat.mode)); | |
2bad8471 EVH |
665 | |
666 | if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) { | |
667 | eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n", | |
668 | PTR_ERR(inode)); | |
669 | ||
670 | result = -ENOSPC; | |
671 | goto FreeFcall; | |
672 | } | |
673 | ||
531b1094 | 674 | inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid); |
2bad8471 | 675 | |
6a3124a3 | 676 | fid = v9fs_fid_create(v9ses, newfid); |
2bad8471 EVH |
677 | if (fid == NULL) { |
678 | dprintk(DEBUG_ERROR, "couldn't insert\n"); | |
679 | result = -ENOMEM; | |
680 | goto FreeFcall; | |
681 | } | |
682 | ||
6a3124a3 LI |
683 | result = v9fs_fid_insert(fid, dentry); |
684 | if (result < 0) | |
685 | goto FreeFcall; | |
686 | ||
531b1094 | 687 | fid->qid = fcall->params.rstat.stat.qid; |
531b1094 | 688 | v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb); |
2bad8471 EVH |
689 | |
690 | d_add(dentry, inode); | |
691 | kfree(fcall); | |
692 | ||
693 | return NULL; | |
694 | ||
695 | FreeFcall: | |
696 | kfree(fcall); | |
697 | return ERR_PTR(result); | |
698 | } | |
699 | ||
700 | /** | |
701 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
702 | * @i: inode that is being unlinked | |
73c592b9 | 703 | * @d: dentry that is being unlinked |
2bad8471 EVH |
704 | * |
705 | */ | |
706 | ||
707 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) | |
708 | { | |
709 | return v9fs_remove(i, d, 0); | |
710 | } | |
711 | ||
712 | /** | |
713 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
714 | * @i: inode that is being unlinked | |
73c592b9 | 715 | * @d: dentry that is being unlinked |
2bad8471 EVH |
716 | * |
717 | */ | |
718 | ||
719 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) | |
720 | { | |
721 | return v9fs_remove(i, d, 1); | |
722 | } | |
723 | ||
724 | /** | |
725 | * v9fs_vfs_rename - VFS hook to rename an inode | |
726 | * @old_dir: old dir inode | |
727 | * @old_dentry: old dentry | |
728 | * @new_dir: new dir inode | |
729 | * @new_dentry: new dentry | |
730 | * | |
731 | */ | |
732 | ||
733 | static int | |
734 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
735 | struct inode *new_dir, struct dentry *new_dentry) | |
736 | { | |
737 | struct inode *old_inode = old_dentry->d_inode; | |
738 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); | |
0b8dd177 | 739 | struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry); |
2bad8471 | 740 | struct v9fs_fid *olddirfid = |
0b8dd177 | 741 | v9fs_fid_lookup(old_dentry->d_parent); |
2bad8471 | 742 | struct v9fs_fid *newdirfid = |
0b8dd177 | 743 | v9fs_fid_lookup(new_dentry->d_parent); |
531b1094 | 744 | struct v9fs_wstat wstat; |
2bad8471 EVH |
745 | struct v9fs_fcall *fcall = NULL; |
746 | int fid = -1; | |
747 | int olddirfidnum = -1; | |
748 | int newdirfidnum = -1; | |
749 | int retval = 0; | |
750 | ||
751 | dprintk(DEBUG_VFS, "\n"); | |
752 | ||
753 | if ((!oldfid) || (!olddirfid) || (!newdirfid)) { | |
754 | dprintk(DEBUG_ERROR, "problem with arguments\n"); | |
755 | return -EBADF; | |
756 | } | |
757 | ||
758 | /* 9P can only handle file rename in the same directory */ | |
759 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { | |
760 | dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); | |
761 | retval = -EPERM; | |
762 | goto FreeFcallnBail; | |
763 | } | |
764 | ||
765 | fid = oldfid->fid; | |
766 | olddirfidnum = olddirfid->fid; | |
767 | newdirfidnum = newdirfid->fid; | |
768 | ||
769 | if (fid < 0) { | |
770 | dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", | |
771 | old_inode->i_ino); | |
772 | retval = -EBADF; | |
773 | goto FreeFcallnBail; | |
774 | } | |
775 | ||
531b1094 LI |
776 | v9fs_blank_wstat(&wstat); |
777 | wstat.muid = v9ses->name; | |
778 | wstat.name = (char *) new_dentry->d_name.name; | |
2bad8471 | 779 | |
531b1094 | 780 | retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall); |
2bad8471 EVH |
781 | |
782 | FreeFcallnBail: | |
2bad8471 | 783 | if (retval < 0) |
531b1094 | 784 | PRINT_FCALL_ERROR("wstat error", fcall); |
2bad8471 EVH |
785 | |
786 | kfree(fcall); | |
787 | return retval; | |
788 | } | |
789 | ||
790 | /** | |
943ffb58 | 791 | * v9fs_vfs_getattr - retrieve file metadata |
2bad8471 EVH |
792 | * @mnt - mount information |
793 | * @dentry - file to get attributes on | |
794 | * @stat - metadata structure to populate | |
795 | * | |
796 | */ | |
797 | ||
798 | static int | |
799 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
800 | struct kstat *stat) | |
801 | { | |
802 | struct v9fs_fcall *fcall = NULL; | |
803 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 804 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 EVH |
805 | int err = -EPERM; |
806 | ||
807 | dprintk(DEBUG_VFS, "dentry: %p\n", dentry); | |
808 | if (!fid) { | |
809 | dprintk(DEBUG_ERROR, | |
810 | "couldn't find fid associated with dentry\n"); | |
811 | return -EBADF; | |
812 | } | |
813 | ||
814 | err = v9fs_t_stat(v9ses, fid->fid, &fcall); | |
815 | ||
816 | if (err < 0) | |
817 | dprintk(DEBUG_ERROR, "stat error\n"); | |
818 | else { | |
531b1094 | 819 | v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode, |
2bad8471 EVH |
820 | dentry->d_inode->i_sb); |
821 | generic_fillattr(dentry->d_inode, stat); | |
822 | } | |
823 | ||
824 | kfree(fcall); | |
825 | return err; | |
826 | } | |
827 | ||
828 | /** | |
829 | * v9fs_vfs_setattr - set file metadata | |
830 | * @dentry: file whose metadata to set | |
831 | * @iattr: metadata assignment structure | |
832 | * | |
833 | */ | |
834 | ||
835 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
836 | { | |
837 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 838 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 | 839 | struct v9fs_fcall *fcall = NULL; |
531b1094 | 840 | struct v9fs_wstat wstat; |
2bad8471 EVH |
841 | int res = -EPERM; |
842 | ||
843 | dprintk(DEBUG_VFS, "\n"); | |
73c592b9 | 844 | |
2bad8471 EVH |
845 | if (!fid) { |
846 | dprintk(DEBUG_ERROR, | |
847 | "Couldn't find fid associated with dentry\n"); | |
848 | return -EBADF; | |
849 | } | |
850 | ||
531b1094 | 851 | v9fs_blank_wstat(&wstat); |
2bad8471 | 852 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 853 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
854 | |
855 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 856 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
857 | |
858 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 859 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
860 | |
861 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 862 | wstat.length = iattr->ia_size; |
2bad8471 EVH |
863 | |
864 | if (v9ses->extended) { | |
531b1094 LI |
865 | if (iattr->ia_valid & ATTR_UID) |
866 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 867 | |
531b1094 LI |
868 | if (iattr->ia_valid & ATTR_GID) |
869 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 EVH |
870 | } |
871 | ||
531b1094 | 872 | res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); |
2bad8471 EVH |
873 | |
874 | if (res < 0) | |
531b1094 | 875 | PRINT_FCALL_ERROR("wstat error", fcall); |
2bad8471 | 876 | |
2bad8471 | 877 | kfree(fcall); |
2bad8471 EVH |
878 | if (res >= 0) |
879 | res = inode_setattr(dentry->d_inode, iattr); | |
880 | ||
881 | return res; | |
882 | } | |
883 | ||
884 | /** | |
531b1094 LI |
885 | * v9fs_stat2inode - populate an inode structure with mistat info |
886 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
887 | * @inode: inode to populate |
888 | * @sb: superblock of filesystem | |
889 | * | |
890 | */ | |
891 | ||
892 | void | |
531b1094 LI |
893 | v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, |
894 | struct super_block *sb) | |
2bad8471 | 895 | { |
1dac06b2 | 896 | int n; |
531b1094 | 897 | char ext[32]; |
2bad8471 EVH |
898 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
899 | ||
900 | inode->i_nlink = 1; | |
901 | ||
531b1094 LI |
902 | inode->i_atime.tv_sec = stat->atime; |
903 | inode->i_mtime.tv_sec = stat->mtime; | |
904 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 905 | |
531b1094 LI |
906 | inode->i_uid = v9ses->uid; |
907 | inode->i_gid = v9ses->gid; | |
2bad8471 EVH |
908 | |
909 | if (v9ses->extended) { | |
531b1094 LI |
910 | inode->i_uid = stat->n_uid; |
911 | inode->i_gid = stat->n_gid; | |
2bad8471 EVH |
912 | } |
913 | ||
531b1094 | 914 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
2bad8471 EVH |
915 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
916 | char type = 0; | |
917 | int major = -1; | |
918 | int minor = -1; | |
531b1094 | 919 | |
1dac06b2 LI |
920 | n = stat->extension.len; |
921 | if (n > sizeof(ext)-1) | |
922 | n = sizeof(ext)-1; | |
923 | memmove(ext, stat->extension.str, n); | |
924 | ext[n] = 0; | |
531b1094 | 925 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
2bad8471 EVH |
926 | switch (type) { |
927 | case 'c': | |
928 | inode->i_mode &= ~S_IFBLK; | |
929 | inode->i_mode |= S_IFCHR; | |
930 | break; | |
931 | case 'b': | |
932 | break; | |
933 | default: | |
531b1094 LI |
934 | dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n", |
935 | type, stat->extension.len, stat->extension.str); | |
2bad8471 EVH |
936 | }; |
937 | inode->i_rdev = MKDEV(major, minor); | |
938 | } else | |
939 | inode->i_rdev = 0; | |
940 | ||
531b1094 | 941 | inode->i_size = stat->length; |
2bad8471 EVH |
942 | |
943 | inode->i_blksize = sb->s_blocksize; | |
944 | inode->i_blocks = | |
945 | (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits; | |
946 | } | |
947 | ||
948 | /** | |
949 | * v9fs_qid2ino - convert qid into inode number | |
950 | * @qid: qid to hash | |
951 | * | |
952 | * BUG: potential for inode number collisions? | |
953 | */ | |
954 | ||
955 | ino_t v9fs_qid2ino(struct v9fs_qid *qid) | |
956 | { | |
957 | u64 path = qid->path + 2; | |
958 | ino_t i = 0; | |
959 | ||
960 | if (sizeof(ino_t) == sizeof(path)) | |
961 | memcpy(&i, &path, sizeof(ino_t)); | |
962 | else | |
963 | i = (ino_t) (path ^ (path >> 32)); | |
964 | ||
965 | return i; | |
966 | } | |
967 | ||
2bad8471 EVH |
968 | /** |
969 | * v9fs_readlink - read a symlink's location (internal version) | |
970 | * @dentry: dentry for symlink | |
73c592b9 | 971 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
972 | * @buflen: length of buffer |
973 | * | |
974 | */ | |
975 | ||
976 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
977 | { | |
978 | int retval = -EPERM; | |
979 | ||
980 | struct v9fs_fcall *fcall = NULL; | |
981 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 982 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 EVH |
983 | |
984 | if (!fid) { | |
985 | dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n"); | |
986 | retval = -EBADF; | |
987 | goto FreeFcall; | |
988 | } | |
989 | ||
990 | if (!v9ses->extended) { | |
991 | retval = -EBADF; | |
992 | dprintk(DEBUG_ERROR, "not extended\n"); | |
993 | goto FreeFcall; | |
994 | } | |
995 | ||
996 | dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); | |
997 | retval = v9fs_t_stat(v9ses, fid->fid, &fcall); | |
998 | ||
999 | if (retval < 0) { | |
1000 | dprintk(DEBUG_ERROR, "stat error\n"); | |
1001 | goto FreeFcall; | |
1002 | } | |
1003 | ||
1004 | if (!fcall) | |
1005 | return -EIO; | |
1006 | ||
531b1094 | 1007 | if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) { |
2bad8471 EVH |
1008 | retval = -EINVAL; |
1009 | goto FreeFcall; | |
1010 | } | |
1011 | ||
1012 | /* copy extension buffer into buffer */ | |
6a3124a3 | 1013 | if (fcall->params.rstat.stat.extension.len < buflen) |
16cce6d2 | 1014 | buflen = fcall->params.rstat.stat.extension.len + 1; |
2bad8471 | 1015 | |
16cce6d2 | 1016 | memmove(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); |
531b1094 | 1017 | buffer[buflen-1] = 0; |
2bad8471 | 1018 | |
16cce6d2 LI |
1019 | dprintk(DEBUG_ERROR, "%s -> %.*s (%s)\n", dentry->d_name.name, fcall->params.rstat.stat.extension.len, |
1020 | fcall->params.rstat.stat.extension.str, buffer); | |
2bad8471 EVH |
1021 | retval = buflen; |
1022 | ||
1023 | FreeFcall: | |
1024 | kfree(fcall); | |
1025 | ||
1026 | return retval; | |
1027 | } | |
1028 | ||
1029 | /** | |
1030 | * v9fs_vfs_readlink - read a symlink's location | |
1031 | * @dentry: dentry for symlink | |
1032 | * @buf: buffer to load symlink location into | |
1033 | * @buflen: length of buffer | |
1034 | * | |
1035 | */ | |
1036 | ||
1037 | static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, | |
1038 | int buflen) | |
1039 | { | |
1040 | int retval; | |
1041 | int ret; | |
1042 | char *link = __getname(); | |
1043 | ||
a1f9d8d2 LI |
1044 | if (buflen > PATH_MAX) |
1045 | buflen = PATH_MAX; | |
2bad8471 EVH |
1046 | |
1047 | dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); | |
1048 | ||
1049 | retval = v9fs_readlink(dentry, link, buflen); | |
1050 | ||
1051 | if (retval > 0) { | |
1052 | if ((ret = copy_to_user(buffer, link, retval)) != 0) { | |
1053 | dprintk(DEBUG_ERROR, "problem copying to user: %d\n", | |
1054 | ret); | |
1055 | retval = ret; | |
1056 | } | |
1057 | } | |
1058 | ||
ce44eeb6 | 1059 | __putname(link); |
2bad8471 EVH |
1060 | return retval; |
1061 | } | |
1062 | ||
1063 | /** | |
1064 | * v9fs_vfs_follow_link - follow a symlink path | |
1065 | * @dentry: dentry for symlink | |
1066 | * @nd: nameidata | |
1067 | * | |
1068 | */ | |
1069 | ||
1070 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1071 | { | |
1072 | int len = 0; | |
1073 | char *link = __getname(); | |
1074 | ||
1075 | dprintk(DEBUG_VFS, "%s n", dentry->d_name.name); | |
1076 | ||
1077 | if (!link) | |
1078 | link = ERR_PTR(-ENOMEM); | |
1079 | else { | |
16cce6d2 | 1080 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
1081 | |
1082 | if (len < 0) { | |
ce44eeb6 | 1083 | __putname(link); |
2bad8471 EVH |
1084 | link = ERR_PTR(len); |
1085 | } else | |
1086 | link[len] = 0; | |
1087 | } | |
1088 | nd_set_link(nd, link); | |
1089 | ||
1090 | return NULL; | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * v9fs_vfs_put_link - release a symlink path | |
1095 | * @dentry: dentry for symlink | |
1096 | * @nd: nameidata | |
1097 | * | |
1098 | */ | |
1099 | ||
1100 | static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) | |
1101 | { | |
1102 | char *s = nd_get_link(nd); | |
1103 | ||
1104 | dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); | |
1105 | if (!IS_ERR(s)) | |
ce44eeb6 | 1106 | __putname(s); |
2bad8471 EVH |
1107 | } |
1108 | ||
531b1094 LI |
1109 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
1110 | int mode, const char *extension) | |
2bad8471 | 1111 | { |
6a3124a3 LI |
1112 | int err; |
1113 | u32 fid, perm; | |
531b1094 | 1114 | struct v9fs_session_info *v9ses; |
6a3124a3 LI |
1115 | struct v9fs_fid *dfid, *vfid; |
1116 | struct inode *inode; | |
2bad8471 | 1117 | |
6a3124a3 LI |
1118 | inode = NULL; |
1119 | vfid = NULL; | |
1120 | v9ses = v9fs_inode2v9ses(dir); | |
1121 | dfid = v9fs_fid_lookup(dentry->d_parent); | |
1122 | perm = unixmode2p9mode(v9ses, mode); | |
2bad8471 EVH |
1123 | |
1124 | if (!v9ses->extended) { | |
1125 | dprintk(DEBUG_ERROR, "not extended\n"); | |
6a3124a3 | 1126 | return -EPERM; |
2bad8471 EVH |
1127 | } |
1128 | ||
6a3124a3 | 1129 | err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, |
16cce6d2 | 1130 | perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL); |
2bad8471 | 1131 | |
6a3124a3 LI |
1132 | if (err) |
1133 | goto error; | |
1134 | ||
1135 | err = v9fs_t_clunk(v9ses, fid); | |
1136 | if (err) | |
1137 | goto error; | |
1138 | ||
1139 | vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); | |
1140 | if (IS_ERR(vfid)) { | |
1141 | err = PTR_ERR(vfid); | |
1142 | vfid = NULL; | |
1143 | goto error; | |
1144 | } | |
1145 | ||
1146 | inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); | |
1147 | if (IS_ERR(inode)) { | |
1148 | err = PTR_ERR(inode); | |
1149 | inode = NULL; | |
1150 | goto error; | |
2bad8471 EVH |
1151 | } |
1152 | ||
6a3124a3 LI |
1153 | dentry->d_op = &v9fs_dentry_operations; |
1154 | d_instantiate(dentry, inode); | |
1155 | return 0; | |
2bad8471 | 1156 | |
6a3124a3 | 1157 | error: |
6a3124a3 LI |
1158 | if (vfid) |
1159 | v9fs_fid_destroy(vfid); | |
1160 | ||
1161 | if (inode) | |
1162 | iput(inode); | |
1163 | ||
1164 | return err; | |
1165 | ||
531b1094 LI |
1166 | } |
1167 | ||
1168 | /** | |
1169 | * v9fs_vfs_symlink - helper function to create symlinks | |
1170 | * @dir: directory inode containing symlink | |
1171 | * @dentry: dentry for symlink | |
1172 | * @symname: symlink data | |
1173 | * | |
1174 | * See 9P2000.u RFC for more information | |
1175 | * | |
1176 | */ | |
1177 | ||
1178 | static int | |
1179 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1180 | { | |
1181 | dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
1182 | symname); | |
1183 | ||
1184 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * v9fs_vfs_link - create a hardlink | |
1189 | * @old_dentry: dentry for file to link to | |
1190 | * @dir: inode destination for new link | |
1191 | * @dentry: dentry for link | |
1192 | * | |
1193 | */ | |
1194 | ||
1195 | /* XXX - lots of code dup'd from symlink and creates, | |
1196 | * figure out a better reuse strategy | |
1197 | */ | |
1198 | ||
1199 | static int | |
1200 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1201 | struct dentry *dentry) | |
1202 | { | |
1203 | int retval; | |
1204 | struct v9fs_fid *oldfid; | |
1205 | char *name; | |
1206 | ||
1207 | dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
1208 | old_dentry->d_name.name); | |
1209 | ||
1210 | oldfid = v9fs_fid_lookup(old_dentry); | |
1211 | if (!oldfid) { | |
1212 | dprintk(DEBUG_ERROR, "can't find oldfid\n"); | |
1213 | return -EPERM; | |
1214 | } | |
1215 | ||
1216 | name = __getname(); | |
16cce6d2 | 1217 | sprintf(name, "%d\n", oldfid->fid); |
531b1094 LI |
1218 | retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name); |
1219 | __putname(name); | |
2bad8471 | 1220 | |
2bad8471 EVH |
1221 | return retval; |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * v9fs_vfs_mknod - create a special file | |
1226 | * @dir: inode destination for new link | |
1227 | * @dentry: dentry for file | |
1228 | * @mode: mode for creation | |
1229 | * @dev_t: device associated with special file | |
1230 | * | |
1231 | */ | |
1232 | ||
1233 | static int | |
1234 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |
1235 | { | |
531b1094 LI |
1236 | int retval; |
1237 | char *name; | |
2bad8471 EVH |
1238 | |
1239 | dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
1240 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); | |
1241 | ||
531b1094 LI |
1242 | if (!new_valid_dev(rdev)) |
1243 | return -EINVAL; | |
2bad8471 | 1244 | |
531b1094 | 1245 | name = __getname(); |
c0291a05 ET |
1246 | if (!name) |
1247 | return -ENOMEM; | |
2bad8471 EVH |
1248 | /* build extension */ |
1249 | if (S_ISBLK(mode)) | |
531b1094 | 1250 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1251 | else if (S_ISCHR(mode)) |
531b1094 | 1252 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1253 | else if (S_ISFIFO(mode)) |
531b1094 | 1254 | *name = 0; |
2bad8471 | 1255 | else { |
531b1094 LI |
1256 | __putname(name); |
1257 | return -EINVAL; | |
2bad8471 EVH |
1258 | } |
1259 | ||
531b1094 LI |
1260 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1261 | __putname(name); | |
2bad8471 EVH |
1262 | |
1263 | return retval; | |
1264 | } | |
1265 | ||
b501611a | 1266 | static struct inode_operations v9fs_dir_inode_operations_ext = { |
2bad8471 EVH |
1267 | .create = v9fs_vfs_create, |
1268 | .lookup = v9fs_vfs_lookup, | |
1269 | .symlink = v9fs_vfs_symlink, | |
1270 | .link = v9fs_vfs_link, | |
1271 | .unlink = v9fs_vfs_unlink, | |
1272 | .mkdir = v9fs_vfs_mkdir, | |
1273 | .rmdir = v9fs_vfs_rmdir, | |
1274 | .mknod = v9fs_vfs_mknod, | |
1275 | .rename = v9fs_vfs_rename, | |
1276 | .readlink = v9fs_vfs_readlink, | |
1277 | .getattr = v9fs_vfs_getattr, | |
1278 | .setattr = v9fs_vfs_setattr, | |
1279 | }; | |
1280 | ||
b501611a EVH |
1281 | static struct inode_operations v9fs_dir_inode_operations = { |
1282 | .create = v9fs_vfs_create, | |
1283 | .lookup = v9fs_vfs_lookup, | |
1284 | .unlink = v9fs_vfs_unlink, | |
1285 | .mkdir = v9fs_vfs_mkdir, | |
1286 | .rmdir = v9fs_vfs_rmdir, | |
1287 | .mknod = v9fs_vfs_mknod, | |
1288 | .rename = v9fs_vfs_rename, | |
1289 | .getattr = v9fs_vfs_getattr, | |
1290 | .setattr = v9fs_vfs_setattr, | |
1291 | }; | |
1292 | ||
2bad8471 EVH |
1293 | static struct inode_operations v9fs_file_inode_operations = { |
1294 | .getattr = v9fs_vfs_getattr, | |
1295 | .setattr = v9fs_vfs_setattr, | |
1296 | }; | |
1297 | ||
1298 | static struct inode_operations v9fs_symlink_inode_operations = { | |
1299 | .readlink = v9fs_vfs_readlink, | |
1300 | .follow_link = v9fs_vfs_follow_link, | |
1301 | .put_link = v9fs_vfs_put_link, | |
1302 | .getattr = v9fs_vfs_getattr, | |
1303 | .setattr = v9fs_vfs_setattr, | |
1304 | }; |