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 | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to: | |
21 | * Free Software Foundation | |
22 | * 51 Franklin Street, Fifth Floor | |
23 | * Boston, MA 02111-1301 USA | |
24 | * | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/pagemap.h> | |
32 | #include <linux/stat.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/inet.h> | |
36 | #include <linux/namei.h> | |
37 | #include <linux/idr.h> | |
38 | ||
39 | #include "debug.h" | |
40 | #include "v9fs.h" | |
41 | #include "9p.h" | |
42 | #include "v9fs_vfs.h" | |
2bad8471 EVH |
43 | #include "fid.h" |
44 | ||
45 | static struct inode_operations v9fs_dir_inode_operations; | |
b501611a | 46 | static struct inode_operations v9fs_dir_inode_operations_ext; |
2bad8471 EVH |
47 | static struct inode_operations v9fs_file_inode_operations; |
48 | static struct inode_operations v9fs_symlink_inode_operations; | |
49 | ||
50 | /** | |
51 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
52 | * @v9ses: v9fs session information | |
53 | * @mode: mode to convert | |
54 | * | |
55 | */ | |
56 | ||
73c592b9 | 57 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
58 | { |
59 | int res; | |
60 | res = mode & 0777; | |
61 | if (S_ISDIR(mode)) | |
62 | res |= V9FS_DMDIR; | |
63 | if (v9ses->extended) { | |
64 | if (S_ISLNK(mode)) | |
65 | res |= V9FS_DMSYMLINK; | |
66 | if (v9ses->nodev == 0) { | |
67 | if (S_ISSOCK(mode)) | |
68 | res |= V9FS_DMSOCKET; | |
69 | if (S_ISFIFO(mode)) | |
70 | res |= V9FS_DMNAMEDPIPE; | |
71 | if (S_ISBLK(mode)) | |
72 | res |= V9FS_DMDEVICE; | |
73 | if (S_ISCHR(mode)) | |
74 | res |= V9FS_DMDEVICE; | |
75 | } | |
76 | ||
77 | if ((mode & S_ISUID) == S_ISUID) | |
78 | res |= V9FS_DMSETUID; | |
79 | if ((mode & S_ISGID) == S_ISGID) | |
80 | res |= V9FS_DMSETGID; | |
81 | if ((mode & V9FS_DMLINK)) | |
82 | res |= V9FS_DMLINK; | |
83 | } | |
84 | ||
85 | return res; | |
86 | } | |
87 | ||
88 | /** | |
89 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
90 | * @v9ses: v9fs session information | |
91 | * @mode: mode to convert | |
92 | * | |
93 | */ | |
94 | ||
73c592b9 | 95 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
96 | { |
97 | int res; | |
98 | ||
99 | res = mode & 0777; | |
100 | ||
101 | if ((mode & V9FS_DMDIR) == V9FS_DMDIR) | |
102 | res |= S_IFDIR; | |
103 | else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended)) | |
104 | res |= S_IFLNK; | |
105 | else if ((mode & V9FS_DMSOCKET) && (v9ses->extended) | |
106 | && (v9ses->nodev == 0)) | |
107 | res |= S_IFSOCK; | |
108 | else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended) | |
109 | && (v9ses->nodev == 0)) | |
110 | res |= S_IFIFO; | |
111 | else if ((mode & V9FS_DMDEVICE) && (v9ses->extended) | |
112 | && (v9ses->nodev == 0)) | |
113 | res |= S_IFBLK; | |
114 | else | |
115 | res |= S_IFREG; | |
116 | ||
117 | if (v9ses->extended) { | |
118 | if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID) | |
119 | res |= S_ISUID; | |
120 | ||
121 | if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID) | |
122 | res |= S_ISGID; | |
123 | } | |
124 | ||
125 | return res; | |
126 | } | |
127 | ||
128 | /** | |
531b1094 | 129 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
2bad8471 | 130 | * @v9ses: 9P session info (for determining extended mode) |
531b1094 | 131 | * @wstat: structure to initialize |
2bad8471 EVH |
132 | * |
133 | */ | |
134 | ||
73c592b9 | 135 | static void |
531b1094 | 136 | v9fs_blank_wstat(struct v9fs_wstat *wstat) |
2bad8471 | 137 | { |
531b1094 LI |
138 | wstat->type = ~0; |
139 | wstat->dev = ~0; | |
140 | wstat->qid.type = ~0; | |
141 | wstat->qid.version = ~0; | |
142 | *((long long *)&wstat->qid.path) = ~0; | |
143 | wstat->mode = ~0; | |
144 | wstat->atime = ~0; | |
145 | wstat->mtime = ~0; | |
146 | wstat->length = ~0; | |
147 | wstat->name = NULL; | |
148 | wstat->uid = NULL; | |
149 | wstat->gid = NULL; | |
150 | wstat->muid = NULL; | |
151 | wstat->n_uid = ~0; | |
152 | wstat->n_gid = ~0; | |
153 | wstat->n_muid = ~0; | |
154 | wstat->extension = NULL; | |
2bad8471 EVH |
155 | } |
156 | ||
157 | /** | |
158 | * v9fs_get_inode - helper function to setup an inode | |
159 | * @sb: superblock | |
160 | * @mode: mode to setup inode with | |
161 | * | |
162 | */ | |
163 | ||
164 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) | |
165 | { | |
166 | struct inode *inode = NULL; | |
b501611a | 167 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
2bad8471 EVH |
168 | |
169 | dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); | |
170 | ||
171 | inode = new_inode(sb); | |
172 | if (inode) { | |
173 | inode->i_mode = mode; | |
174 | inode->i_uid = current->fsuid; | |
175 | inode->i_gid = current->fsgid; | |
176 | inode->i_blksize = sb->s_blocksize; | |
177 | inode->i_blocks = 0; | |
178 | inode->i_rdev = 0; | |
179 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
180 | ||
181 | switch (mode & S_IFMT) { | |
182 | case S_IFIFO: | |
183 | case S_IFBLK: | |
184 | case S_IFCHR: | |
185 | case S_IFSOCK: | |
b501611a EVH |
186 | if(!v9ses->extended) { |
187 | dprintk(DEBUG_ERROR, "special files without extended mode\n"); | |
188 | return ERR_PTR(-EINVAL); | |
189 | } | |
5d58bec5 EVH |
190 | init_special_inode(inode, inode->i_mode, |
191 | inode->i_rdev); | |
192 | break; | |
2bad8471 EVH |
193 | case S_IFREG: |
194 | inode->i_op = &v9fs_file_inode_operations; | |
195 | inode->i_fop = &v9fs_file_operations; | |
196 | break; | |
b501611a EVH |
197 | case S_IFLNK: |
198 | if(!v9ses->extended) { | |
199 | dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n"); | |
200 | return ERR_PTR(-EINVAL); | |
201 | } | |
202 | inode->i_op = &v9fs_symlink_inode_operations; | |
203 | break; | |
2bad8471 EVH |
204 | case S_IFDIR: |
205 | inode->i_nlink++; | |
b501611a EVH |
206 | if(v9ses->extended) |
207 | inode->i_op = &v9fs_dir_inode_operations_ext; | |
208 | else | |
209 | inode->i_op = &v9fs_dir_inode_operations; | |
2bad8471 EVH |
210 | inode->i_fop = &v9fs_dir_operations; |
211 | break; | |
2bad8471 EVH |
212 | default: |
213 | dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", | |
214 | mode, mode & S_IFMT); | |
215 | return ERR_PTR(-EINVAL); | |
216 | } | |
217 | } else { | |
218 | eprintk(KERN_WARNING, "Problem allocating inode\n"); | |
219 | return ERR_PTR(-ENOMEM); | |
220 | } | |
221 | return inode; | |
222 | } | |
223 | ||
224 | /** | |
225 | * v9fs_create - helper function to create files and directories | |
226 | * @dir: directory inode file is being created in | |
227 | * @file_dentry: dentry file is being created in | |
228 | * @perm: permissions file is being created with | |
73c592b9 | 229 | * @open_mode: resulting open mode for file |
2bad8471 EVH |
230 | * |
231 | */ | |
232 | ||
233 | static int | |
234 | v9fs_create(struct inode *dir, | |
235 | struct dentry *file_dentry, | |
236 | unsigned int perm, unsigned int open_mode) | |
237 | { | |
238 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); | |
239 | struct super_block *sb = dir->i_sb; | |
240 | struct v9fs_fid *dirfid = | |
0b8dd177 | 241 | v9fs_fid_lookup(file_dentry->d_parent); |
2bad8471 EVH |
242 | struct v9fs_fid *fid = NULL; |
243 | struct inode *file_inode = NULL; | |
244 | struct v9fs_fcall *fcall = NULL; | |
245 | struct v9fs_qid qid; | |
2bad8471 EVH |
246 | int dirfidnum = -1; |
247 | long newfid = -1; | |
248 | int result = 0; | |
249 | unsigned int iounit = 0; | |
0b8dd177 | 250 | int wfidno = -1; |
3cf6429a | 251 | int err; |
2bad8471 EVH |
252 | |
253 | perm = unixmode2p9mode(v9ses, perm); | |
254 | ||
255 | dprintk(DEBUG_VFS, "dir: %p dentry: %p perm: %o mode: %o\n", dir, | |
256 | file_dentry, perm, open_mode); | |
257 | ||
258 | if (!dirfid) | |
259 | return -EBADF; | |
260 | ||
261 | dirfidnum = dirfid->fid; | |
262 | if (dirfidnum < 0) { | |
263 | dprintk(DEBUG_ERROR, "No fid for the directory #%lu\n", | |
264 | dir->i_ino); | |
265 | return -EBADF; | |
266 | } | |
267 | ||
268 | if (file_dentry->d_inode) { | |
269 | dprintk(DEBUG_ERROR, | |
270 | "Odd. There is an inode for dir %lu, name :%s:\n", | |
271 | dir->i_ino, file_dentry->d_name.name); | |
272 | return -EEXIST; | |
273 | } | |
274 | ||
275 | newfid = v9fs_get_idpool(&v9ses->fidpool); | |
276 | if (newfid < 0) { | |
277 | eprintk(KERN_WARNING, "no free fids available\n"); | |
278 | return -ENOSPC; | |
279 | } | |
280 | ||
281 | result = v9fs_t_walk(v9ses, dirfidnum, newfid, NULL, &fcall); | |
282 | if (result < 0) { | |
531b1094 | 283 | PRINT_FCALL_ERROR("clone error", fcall); |
2bad8471 | 284 | v9fs_put_idpool(newfid, &v9ses->fidpool); |
0b8dd177 | 285 | newfid = -1; |
2bad8471 EVH |
286 | goto CleanUpFid; |
287 | } | |
288 | ||
289 | kfree(fcall); | |
3cf6429a | 290 | fcall = NULL; |
2bad8471 EVH |
291 | |
292 | result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name, | |
293 | perm, open_mode, &fcall); | |
294 | if (result < 0) { | |
531b1094 | 295 | PRINT_FCALL_ERROR("create fails", fcall); |
2bad8471 EVH |
296 | goto CleanUpFid; |
297 | } | |
298 | ||
299 | iounit = fcall->params.rcreate.iounit; | |
300 | qid = fcall->params.rcreate.qid; | |
301 | kfree(fcall); | |
3cf6429a | 302 | fcall = NULL; |
2bad8471 | 303 | |
3cf6429a LI |
304 | if (!(perm&V9FS_DMDIR)) { |
305 | fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1); | |
306 | dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate); | |
307 | if (!fid) { | |
308 | result = -ENOMEM; | |
309 | goto CleanUpFid; | |
310 | } | |
2bad8471 | 311 | |
3cf6429a LI |
312 | fid->qid = qid; |
313 | fid->iounit = iounit; | |
314 | } else { | |
315 | err = v9fs_t_clunk(v9ses, newfid); | |
d8da097a | 316 | newfid = -1; |
3cf6429a LI |
317 | if (err < 0) |
318 | dprintk(DEBUG_ERROR, "clunk for mkdir failed: %d\n", err); | |
319 | } | |
0b8dd177 LI |
320 | |
321 | /* walk to the newly created file and put the fid in the dentry */ | |
322 | wfidno = v9fs_get_idpool(&v9ses->fidpool); | |
d8da097a | 323 | if (wfidno < 0) { |
0b8dd177 LI |
324 | eprintk(KERN_WARNING, "no free fids available\n"); |
325 | return -ENOSPC; | |
326 | } | |
327 | ||
328 | result = v9fs_t_walk(v9ses, dirfidnum, wfidno, | |
3cf6429a | 329 | (char *) file_dentry->d_name.name, &fcall); |
0b8dd177 | 330 | if (result < 0) { |
531b1094 | 331 | PRINT_FCALL_ERROR("clone error", fcall); |
0b8dd177 LI |
332 | v9fs_put_idpool(wfidno, &v9ses->fidpool); |
333 | wfidno = -1; | |
334 | goto CleanUpFid; | |
335 | } | |
3cf6429a LI |
336 | kfree(fcall); |
337 | fcall = NULL; | |
0b8dd177 LI |
338 | |
339 | if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) { | |
3cf6429a | 340 | v9fs_put_idpool(wfidno, &v9ses->fidpool); |
0b8dd177 LI |
341 | |
342 | goto CleanUpFid; | |
343 | } | |
2bad8471 EVH |
344 | |
345 | if ((perm & V9FS_DMSYMLINK) || (perm & V9FS_DMLINK) || | |
346 | (perm & V9FS_DMNAMEDPIPE) || (perm & V9FS_DMSOCKET) || | |
347 | (perm & V9FS_DMDEVICE)) | |
348 | return 0; | |
349 | ||
d8da097a | 350 | result = v9fs_t_stat(v9ses, wfidno, &fcall); |
2bad8471 | 351 | if (result < 0) { |
531b1094 | 352 | PRINT_FCALL_ERROR("stat error", fcall); |
2bad8471 EVH |
353 | goto CleanUpFid; |
354 | } | |
355 | ||
2bad8471 | 356 | |
531b1094 LI |
357 | file_inode = v9fs_get_inode(sb, |
358 | p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode)); | |
359 | ||
2bad8471 EVH |
360 | if ((!file_inode) || IS_ERR(file_inode)) { |
361 | dprintk(DEBUG_ERROR, "create inode failed\n"); | |
362 | result = -EBADF; | |
363 | goto CleanUpFid; | |
364 | } | |
365 | ||
531b1094 | 366 | v9fs_stat2inode(&fcall->params.rstat.stat, file_inode, sb); |
2bad8471 | 367 | kfree(fcall); |
a93a117e LI |
368 | fcall = NULL; |
369 | file_dentry->d_op = &v9fs_dentry_operations; | |
2bad8471 EVH |
370 | d_instantiate(file_dentry, file_inode); |
371 | ||
2bad8471 EVH |
372 | return 0; |
373 | ||
374 | CleanUpFid: | |
375 | kfree(fcall); | |
3cf6429a | 376 | fcall = NULL; |
2bad8471 | 377 | |
0b8dd177 | 378 | if (newfid >= 0) { |
3cf6429a LI |
379 | err = v9fs_t_clunk(v9ses, newfid); |
380 | if (err < 0) | |
381 | dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); | |
0b8dd177 LI |
382 | } |
383 | if (wfidno >= 0) { | |
3cf6429a LI |
384 | err = v9fs_t_clunk(v9ses, wfidno); |
385 | if (err < 0) | |
386 | dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); | |
2bad8471 EVH |
387 | } |
388 | return result; | |
389 | } | |
390 | ||
391 | /** | |
392 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 EVH |
393 | * @dir: directory inode that is being deleted |
394 | * @file: dentry that is being deleted | |
395 | * @rmdir: removing a directory | |
2bad8471 EVH |
396 | * |
397 | */ | |
398 | ||
399 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) | |
400 | { | |
401 | struct v9fs_fcall *fcall = NULL; | |
402 | struct super_block *sb = NULL; | |
403 | struct v9fs_session_info *v9ses = NULL; | |
404 | struct v9fs_fid *v9fid = NULL; | |
405 | struct inode *file_inode = NULL; | |
406 | int fid = -1; | |
407 | int result = 0; | |
408 | ||
409 | dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, | |
410 | rmdir); | |
411 | ||
412 | file_inode = file->d_inode; | |
413 | sb = file_inode->i_sb; | |
414 | v9ses = v9fs_inode2v9ses(file_inode); | |
0b8dd177 | 415 | v9fid = v9fs_fid_lookup(file); |
2bad8471 EVH |
416 | |
417 | if (!v9fid) { | |
418 | dprintk(DEBUG_ERROR, | |
419 | "no v9fs_fid\n"); | |
420 | return -EBADF; | |
421 | } | |
422 | ||
423 | fid = v9fid->fid; | |
424 | if (fid < 0) { | |
425 | dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n", | |
426 | file_inode->i_ino); | |
427 | return -EBADF; | |
428 | } | |
429 | ||
430 | result = v9fs_t_remove(v9ses, fid, &fcall); | |
531b1094 LI |
431 | if (result < 0) { |
432 | PRINT_FCALL_ERROR("remove fails", fcall); | |
433 | } else { | |
2bad8471 EVH |
434 | v9fs_put_idpool(fid, &v9ses->fidpool); |
435 | v9fs_fid_destroy(v9fid); | |
436 | } | |
437 | ||
438 | kfree(fcall); | |
439 | return result; | |
440 | } | |
441 | ||
442 | /** | |
443 | * v9fs_vfs_create - VFS hook to create files | |
444 | * @inode: directory inode that is being deleted | |
445 | * @dentry: dentry that is being deleted | |
446 | * @perm: create permissions | |
447 | * @nd: path information | |
448 | * | |
449 | */ | |
450 | ||
451 | static int | |
452 | v9fs_vfs_create(struct inode *inode, struct dentry *dentry, int perm, | |
453 | struct nameidata *nd) | |
454 | { | |
455 | return v9fs_create(inode, dentry, perm, O_RDWR); | |
456 | } | |
457 | ||
458 | /** | |
459 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
73c592b9 | 460 | * @inode: inode that is being unlinked |
2bad8471 EVH |
461 | * @dentry: dentry that is being unlinked |
462 | * @mode: mode for new directory | |
463 | * | |
464 | */ | |
465 | ||
466 | static int v9fs_vfs_mkdir(struct inode *inode, struct dentry *dentry, int mode) | |
467 | { | |
468 | return v9fs_create(inode, dentry, mode | S_IFDIR, O_RDONLY); | |
469 | } | |
470 | ||
471 | /** | |
472 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
473 | * @dir: inode that is being walked from | |
474 | * @dentry: dentry that is being walked to? | |
475 | * @nameidata: path data | |
476 | * | |
477 | */ | |
478 | ||
479 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, | |
480 | struct nameidata *nameidata) | |
481 | { | |
482 | struct super_block *sb; | |
483 | struct v9fs_session_info *v9ses; | |
484 | struct v9fs_fid *dirfid; | |
485 | struct v9fs_fid *fid; | |
486 | struct inode *inode; | |
487 | struct v9fs_fcall *fcall = NULL; | |
2bad8471 EVH |
488 | int dirfidnum = -1; |
489 | int newfid = -1; | |
490 | int result = 0; | |
491 | ||
492 | dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", | |
493 | dir, dentry->d_iname, dentry, nameidata); | |
494 | ||
495 | sb = dir->i_sb; | |
496 | v9ses = v9fs_inode2v9ses(dir); | |
0b8dd177 | 497 | dirfid = v9fs_fid_lookup(dentry->d_parent); |
2bad8471 EVH |
498 | |
499 | if (!dirfid) { | |
500 | dprintk(DEBUG_ERROR, "no dirfid\n"); | |
501 | return ERR_PTR(-EINVAL); | |
502 | } | |
503 | ||
504 | dirfidnum = dirfid->fid; | |
505 | ||
506 | if (dirfidnum < 0) { | |
507 | dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n", | |
508 | dir, dir->i_ino); | |
509 | return ERR_PTR(-EBADF); | |
510 | } | |
511 | ||
512 | newfid = v9fs_get_idpool(&v9ses->fidpool); | |
513 | if (newfid < 0) { | |
514 | eprintk(KERN_WARNING, "newfid fails!\n"); | |
515 | return ERR_PTR(-ENOSPC); | |
516 | } | |
517 | ||
518 | result = | |
519 | v9fs_t_walk(v9ses, dirfidnum, newfid, (char *)dentry->d_name.name, | |
520 | NULL); | |
521 | if (result < 0) { | |
522 | v9fs_put_idpool(newfid, &v9ses->fidpool); | |
523 | if (result == -ENOENT) { | |
524 | d_add(dentry, NULL); | |
0b8dd177 | 525 | dprintk(DEBUG_VFS, |
2bad8471 EVH |
526 | "Return negative dentry %p count %d\n", |
527 | dentry, atomic_read(&dentry->d_count)); | |
528 | return NULL; | |
529 | } | |
530 | dprintk(DEBUG_ERROR, "walk error:%d\n", result); | |
531 | goto FreeFcall; | |
532 | } | |
533 | ||
534 | result = v9fs_t_stat(v9ses, newfid, &fcall); | |
535 | if (result < 0) { | |
536 | dprintk(DEBUG_ERROR, "stat error\n"); | |
537 | goto FreeFcall; | |
538 | } | |
539 | ||
531b1094 LI |
540 | inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses, |
541 | fcall->params.rstat.stat.mode)); | |
2bad8471 EVH |
542 | |
543 | if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) { | |
544 | eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n", | |
545 | PTR_ERR(inode)); | |
546 | ||
547 | result = -ENOSPC; | |
548 | goto FreeFcall; | |
549 | } | |
550 | ||
531b1094 | 551 | inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid); |
2bad8471 | 552 | |
0b8dd177 | 553 | fid = v9fs_fid_create(dentry, v9ses, newfid, 0); |
2bad8471 EVH |
554 | if (fid == NULL) { |
555 | dprintk(DEBUG_ERROR, "couldn't insert\n"); | |
556 | result = -ENOMEM; | |
557 | goto FreeFcall; | |
558 | } | |
559 | ||
531b1094 | 560 | fid->qid = fcall->params.rstat.stat.qid; |
2bad8471 EVH |
561 | |
562 | dentry->d_op = &v9fs_dentry_operations; | |
531b1094 | 563 | v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb); |
2bad8471 EVH |
564 | |
565 | d_add(dentry, inode); | |
566 | kfree(fcall); | |
567 | ||
568 | return NULL; | |
569 | ||
570 | FreeFcall: | |
571 | kfree(fcall); | |
572 | return ERR_PTR(result); | |
573 | } | |
574 | ||
575 | /** | |
576 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
577 | * @i: inode that is being unlinked | |
73c592b9 | 578 | * @d: dentry that is being unlinked |
2bad8471 EVH |
579 | * |
580 | */ | |
581 | ||
582 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) | |
583 | { | |
584 | return v9fs_remove(i, d, 0); | |
585 | } | |
586 | ||
587 | /** | |
588 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
589 | * @i: inode that is being unlinked | |
73c592b9 | 590 | * @d: dentry that is being unlinked |
2bad8471 EVH |
591 | * |
592 | */ | |
593 | ||
594 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) | |
595 | { | |
596 | return v9fs_remove(i, d, 1); | |
597 | } | |
598 | ||
599 | /** | |
600 | * v9fs_vfs_rename - VFS hook to rename an inode | |
601 | * @old_dir: old dir inode | |
602 | * @old_dentry: old dentry | |
603 | * @new_dir: new dir inode | |
604 | * @new_dentry: new dentry | |
605 | * | |
606 | */ | |
607 | ||
608 | static int | |
609 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
610 | struct inode *new_dir, struct dentry *new_dentry) | |
611 | { | |
612 | struct inode *old_inode = old_dentry->d_inode; | |
613 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); | |
0b8dd177 | 614 | struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry); |
2bad8471 | 615 | struct v9fs_fid *olddirfid = |
0b8dd177 | 616 | v9fs_fid_lookup(old_dentry->d_parent); |
2bad8471 | 617 | struct v9fs_fid *newdirfid = |
0b8dd177 | 618 | v9fs_fid_lookup(new_dentry->d_parent); |
531b1094 | 619 | struct v9fs_wstat wstat; |
2bad8471 EVH |
620 | struct v9fs_fcall *fcall = NULL; |
621 | int fid = -1; | |
622 | int olddirfidnum = -1; | |
623 | int newdirfidnum = -1; | |
624 | int retval = 0; | |
625 | ||
626 | dprintk(DEBUG_VFS, "\n"); | |
627 | ||
628 | if ((!oldfid) || (!olddirfid) || (!newdirfid)) { | |
629 | dprintk(DEBUG_ERROR, "problem with arguments\n"); | |
630 | return -EBADF; | |
631 | } | |
632 | ||
633 | /* 9P can only handle file rename in the same directory */ | |
634 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { | |
635 | dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); | |
636 | retval = -EPERM; | |
637 | goto FreeFcallnBail; | |
638 | } | |
639 | ||
640 | fid = oldfid->fid; | |
641 | olddirfidnum = olddirfid->fid; | |
642 | newdirfidnum = newdirfid->fid; | |
643 | ||
644 | if (fid < 0) { | |
645 | dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", | |
646 | old_inode->i_ino); | |
647 | retval = -EBADF; | |
648 | goto FreeFcallnBail; | |
649 | } | |
650 | ||
531b1094 LI |
651 | v9fs_blank_wstat(&wstat); |
652 | wstat.muid = v9ses->name; | |
653 | wstat.name = (char *) new_dentry->d_name.name; | |
2bad8471 | 654 | |
531b1094 | 655 | retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall); |
2bad8471 EVH |
656 | |
657 | FreeFcallnBail: | |
2bad8471 | 658 | if (retval < 0) |
531b1094 | 659 | PRINT_FCALL_ERROR("wstat error", fcall); |
2bad8471 EVH |
660 | |
661 | kfree(fcall); | |
662 | return retval; | |
663 | } | |
664 | ||
665 | /** | |
666 | * v9fs_vfs_getattr - retreive file metadata | |
667 | * @mnt - mount information | |
668 | * @dentry - file to get attributes on | |
669 | * @stat - metadata structure to populate | |
670 | * | |
671 | */ | |
672 | ||
673 | static int | |
674 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
675 | struct kstat *stat) | |
676 | { | |
677 | struct v9fs_fcall *fcall = NULL; | |
678 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 679 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 EVH |
680 | int err = -EPERM; |
681 | ||
682 | dprintk(DEBUG_VFS, "dentry: %p\n", dentry); | |
683 | if (!fid) { | |
684 | dprintk(DEBUG_ERROR, | |
685 | "couldn't find fid associated with dentry\n"); | |
686 | return -EBADF; | |
687 | } | |
688 | ||
689 | err = v9fs_t_stat(v9ses, fid->fid, &fcall); | |
690 | ||
691 | if (err < 0) | |
692 | dprintk(DEBUG_ERROR, "stat error\n"); | |
693 | else { | |
531b1094 | 694 | v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode, |
2bad8471 EVH |
695 | dentry->d_inode->i_sb); |
696 | generic_fillattr(dentry->d_inode, stat); | |
697 | } | |
698 | ||
699 | kfree(fcall); | |
700 | return err; | |
701 | } | |
702 | ||
703 | /** | |
704 | * v9fs_vfs_setattr - set file metadata | |
705 | * @dentry: file whose metadata to set | |
706 | * @iattr: metadata assignment structure | |
707 | * | |
708 | */ | |
709 | ||
710 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
711 | { | |
712 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 713 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 | 714 | struct v9fs_fcall *fcall = NULL; |
531b1094 | 715 | struct v9fs_wstat wstat; |
2bad8471 EVH |
716 | int res = -EPERM; |
717 | ||
718 | dprintk(DEBUG_VFS, "\n"); | |
73c592b9 | 719 | |
2bad8471 EVH |
720 | if (!fid) { |
721 | dprintk(DEBUG_ERROR, | |
722 | "Couldn't find fid associated with dentry\n"); | |
723 | return -EBADF; | |
724 | } | |
725 | ||
531b1094 | 726 | v9fs_blank_wstat(&wstat); |
2bad8471 | 727 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 728 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
729 | |
730 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 731 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
732 | |
733 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 734 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
735 | |
736 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 737 | wstat.length = iattr->ia_size; |
2bad8471 EVH |
738 | |
739 | if (v9ses->extended) { | |
531b1094 LI |
740 | if (iattr->ia_valid & ATTR_UID) |
741 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 742 | |
531b1094 LI |
743 | if (iattr->ia_valid & ATTR_GID) |
744 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 EVH |
745 | } |
746 | ||
531b1094 | 747 | res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); |
2bad8471 EVH |
748 | |
749 | if (res < 0) | |
531b1094 | 750 | PRINT_FCALL_ERROR("wstat error", fcall); |
2bad8471 | 751 | |
2bad8471 | 752 | kfree(fcall); |
2bad8471 EVH |
753 | if (res >= 0) |
754 | res = inode_setattr(dentry->d_inode, iattr); | |
755 | ||
756 | return res; | |
757 | } | |
758 | ||
759 | /** | |
531b1094 LI |
760 | * v9fs_stat2inode - populate an inode structure with mistat info |
761 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
762 | * @inode: inode to populate |
763 | * @sb: superblock of filesystem | |
764 | * | |
765 | */ | |
766 | ||
767 | void | |
531b1094 LI |
768 | v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, |
769 | struct super_block *sb) | |
2bad8471 | 770 | { |
531b1094 | 771 | char ext[32]; |
2bad8471 EVH |
772 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
773 | ||
774 | inode->i_nlink = 1; | |
775 | ||
531b1094 LI |
776 | inode->i_atime.tv_sec = stat->atime; |
777 | inode->i_mtime.tv_sec = stat->mtime; | |
778 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 779 | |
531b1094 LI |
780 | inode->i_uid = v9ses->uid; |
781 | inode->i_gid = v9ses->gid; | |
2bad8471 EVH |
782 | |
783 | if (v9ses->extended) { | |
531b1094 LI |
784 | inode->i_uid = stat->n_uid; |
785 | inode->i_gid = stat->n_gid; | |
2bad8471 EVH |
786 | } |
787 | ||
531b1094 | 788 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
2bad8471 EVH |
789 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
790 | char type = 0; | |
791 | int major = -1; | |
792 | int minor = -1; | |
531b1094 LI |
793 | |
794 | v9fs_str_copy(ext, sizeof(ext), &stat->extension); | |
795 | sscanf(ext, "%c %u %u", &type, &major, &minor); | |
2bad8471 EVH |
796 | switch (type) { |
797 | case 'c': | |
798 | inode->i_mode &= ~S_IFBLK; | |
799 | inode->i_mode |= S_IFCHR; | |
800 | break; | |
801 | case 'b': | |
802 | break; | |
803 | default: | |
531b1094 LI |
804 | dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n", |
805 | type, stat->extension.len, stat->extension.str); | |
2bad8471 EVH |
806 | }; |
807 | inode->i_rdev = MKDEV(major, minor); | |
808 | } else | |
809 | inode->i_rdev = 0; | |
810 | ||
531b1094 | 811 | inode->i_size = stat->length; |
2bad8471 EVH |
812 | |
813 | inode->i_blksize = sb->s_blocksize; | |
814 | inode->i_blocks = | |
815 | (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits; | |
816 | } | |
817 | ||
818 | /** | |
819 | * v9fs_qid2ino - convert qid into inode number | |
820 | * @qid: qid to hash | |
821 | * | |
822 | * BUG: potential for inode number collisions? | |
823 | */ | |
824 | ||
825 | ino_t v9fs_qid2ino(struct v9fs_qid *qid) | |
826 | { | |
827 | u64 path = qid->path + 2; | |
828 | ino_t i = 0; | |
829 | ||
830 | if (sizeof(ino_t) == sizeof(path)) | |
831 | memcpy(&i, &path, sizeof(ino_t)); | |
832 | else | |
833 | i = (ino_t) (path ^ (path >> 32)); | |
834 | ||
835 | return i; | |
836 | } | |
837 | ||
2bad8471 EVH |
838 | /** |
839 | * v9fs_readlink - read a symlink's location (internal version) | |
840 | * @dentry: dentry for symlink | |
73c592b9 | 841 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
842 | * @buflen: length of buffer |
843 | * | |
844 | */ | |
845 | ||
846 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
847 | { | |
848 | int retval = -EPERM; | |
849 | ||
850 | struct v9fs_fcall *fcall = NULL; | |
851 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 852 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 EVH |
853 | |
854 | if (!fid) { | |
855 | dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n"); | |
856 | retval = -EBADF; | |
857 | goto FreeFcall; | |
858 | } | |
859 | ||
860 | if (!v9ses->extended) { | |
861 | retval = -EBADF; | |
862 | dprintk(DEBUG_ERROR, "not extended\n"); | |
863 | goto FreeFcall; | |
864 | } | |
865 | ||
866 | dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); | |
867 | retval = v9fs_t_stat(v9ses, fid->fid, &fcall); | |
868 | ||
869 | if (retval < 0) { | |
870 | dprintk(DEBUG_ERROR, "stat error\n"); | |
871 | goto FreeFcall; | |
872 | } | |
873 | ||
874 | if (!fcall) | |
875 | return -EIO; | |
876 | ||
531b1094 | 877 | if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) { |
2bad8471 EVH |
878 | retval = -EINVAL; |
879 | goto FreeFcall; | |
880 | } | |
881 | ||
882 | /* copy extension buffer into buffer */ | |
531b1094 LI |
883 | if (fcall->params.rstat.stat.extension.len < buflen) |
884 | buflen = fcall->params.rstat.stat.extension.len; | |
2bad8471 | 885 | |
531b1094 LI |
886 | memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); |
887 | buffer[buflen-1] = 0; | |
2bad8471 EVH |
888 | |
889 | retval = buflen; | |
890 | ||
891 | FreeFcall: | |
892 | kfree(fcall); | |
893 | ||
894 | return retval; | |
895 | } | |
896 | ||
897 | /** | |
898 | * v9fs_vfs_readlink - read a symlink's location | |
899 | * @dentry: dentry for symlink | |
900 | * @buf: buffer to load symlink location into | |
901 | * @buflen: length of buffer | |
902 | * | |
903 | */ | |
904 | ||
905 | static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, | |
906 | int buflen) | |
907 | { | |
908 | int retval; | |
909 | int ret; | |
910 | char *link = __getname(); | |
911 | ||
a1f9d8d2 LI |
912 | if (buflen > PATH_MAX) |
913 | buflen = PATH_MAX; | |
2bad8471 EVH |
914 | |
915 | dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); | |
916 | ||
917 | retval = v9fs_readlink(dentry, link, buflen); | |
918 | ||
919 | if (retval > 0) { | |
920 | if ((ret = copy_to_user(buffer, link, retval)) != 0) { | |
921 | dprintk(DEBUG_ERROR, "problem copying to user: %d\n", | |
922 | ret); | |
923 | retval = ret; | |
924 | } | |
925 | } | |
926 | ||
ce44eeb6 | 927 | __putname(link); |
2bad8471 EVH |
928 | return retval; |
929 | } | |
930 | ||
931 | /** | |
932 | * v9fs_vfs_follow_link - follow a symlink path | |
933 | * @dentry: dentry for symlink | |
934 | * @nd: nameidata | |
935 | * | |
936 | */ | |
937 | ||
938 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
939 | { | |
940 | int len = 0; | |
941 | char *link = __getname(); | |
942 | ||
943 | dprintk(DEBUG_VFS, "%s n", dentry->d_name.name); | |
944 | ||
945 | if (!link) | |
946 | link = ERR_PTR(-ENOMEM); | |
947 | else { | |
948 | len = v9fs_readlink(dentry, link, strlen(link)); | |
949 | ||
950 | if (len < 0) { | |
ce44eeb6 | 951 | __putname(link); |
2bad8471 EVH |
952 | link = ERR_PTR(len); |
953 | } else | |
954 | link[len] = 0; | |
955 | } | |
956 | nd_set_link(nd, link); | |
957 | ||
958 | return NULL; | |
959 | } | |
960 | ||
961 | /** | |
962 | * v9fs_vfs_put_link - release a symlink path | |
963 | * @dentry: dentry for symlink | |
964 | * @nd: nameidata | |
965 | * | |
966 | */ | |
967 | ||
968 | static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) | |
969 | { | |
970 | char *s = nd_get_link(nd); | |
971 | ||
972 | dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); | |
973 | if (!IS_ERR(s)) | |
ce44eeb6 | 974 | __putname(s); |
2bad8471 EVH |
975 | } |
976 | ||
531b1094 LI |
977 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
978 | int mode, const char *extension) | |
2bad8471 | 979 | { |
531b1094 LI |
980 | int err, retval; |
981 | struct v9fs_session_info *v9ses; | |
982 | struct v9fs_fcall *fcall; | |
983 | struct v9fs_fid *fid; | |
984 | struct v9fs_wstat wstat; | |
2bad8471 | 985 | |
531b1094 LI |
986 | v9ses = v9fs_inode2v9ses(dir); |
987 | retval = -EPERM; | |
988 | fcall = NULL; | |
2bad8471 EVH |
989 | |
990 | if (!v9ses->extended) { | |
991 | dprintk(DEBUG_ERROR, "not extended\n"); | |
531b1094 | 992 | goto free_mem; |
2bad8471 EVH |
993 | } |
994 | ||
2bad8471 | 995 | /* issue a create */ |
531b1094 | 996 | retval = v9fs_create(dir, dentry, mode, 0); |
2bad8471 | 997 | if (retval != 0) |
531b1094 | 998 | goto free_mem; |
2bad8471 | 999 | |
531b1094 LI |
1000 | fid = v9fs_fid_get_created(dentry); |
1001 | if (!fid) { | |
2bad8471 | 1002 | dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n"); |
531b1094 | 1003 | goto free_mem; |
2bad8471 EVH |
1004 | } |
1005 | ||
531b1094 LI |
1006 | /* issue a Twstat */ |
1007 | v9fs_blank_wstat(&wstat); | |
1008 | wstat.muid = v9ses->name; | |
1009 | wstat.extension = (char *) extension; | |
1010 | retval = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); | |
2bad8471 | 1011 | if (retval < 0) { |
531b1094 LI |
1012 | PRINT_FCALL_ERROR("wstat error", fcall); |
1013 | goto free_mem; | |
2bad8471 EVH |
1014 | } |
1015 | ||
531b1094 | 1016 | err = v9fs_t_clunk(v9ses, fid->fid); |
3cf6429a | 1017 | if (err < 0) { |
531b1094 LI |
1018 | dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); |
1019 | goto free_mem; | |
2bad8471 EVH |
1020 | } |
1021 | ||
1022 | d_drop(dentry); /* FID - will this also clunk? */ | |
1023 | ||
531b1094 | 1024 | free_mem: |
2bad8471 | 1025 | kfree(fcall); |
531b1094 LI |
1026 | return retval; |
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 | { | |
1042 | dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
1043 | symname); | |
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; | |
1065 | struct v9fs_fid *oldfid; | |
1066 | char *name; | |
1067 | ||
1068 | dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
1069 | old_dentry->d_name.name); | |
1070 | ||
1071 | oldfid = v9fs_fid_lookup(old_dentry); | |
1072 | if (!oldfid) { | |
1073 | dprintk(DEBUG_ERROR, "can't find oldfid\n"); | |
1074 | return -EPERM; | |
1075 | } | |
1076 | ||
1077 | name = __getname(); | |
1078 | sprintf(name, "hardlink(%d)\n", oldfid->fid); | |
1079 | retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name); | |
1080 | __putname(name); | |
2bad8471 | 1081 | |
2bad8471 EVH |
1082 | return retval; |
1083 | } | |
1084 | ||
1085 | /** | |
1086 | * v9fs_vfs_mknod - create a special file | |
1087 | * @dir: inode destination for new link | |
1088 | * @dentry: dentry for file | |
1089 | * @mode: mode for creation | |
1090 | * @dev_t: device associated with special file | |
1091 | * | |
1092 | */ | |
1093 | ||
1094 | static int | |
1095 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |
1096 | { | |
531b1094 LI |
1097 | int retval; |
1098 | char *name; | |
2bad8471 EVH |
1099 | |
1100 | dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
1101 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); | |
1102 | ||
531b1094 LI |
1103 | if (!new_valid_dev(rdev)) |
1104 | return -EINVAL; | |
2bad8471 | 1105 | |
531b1094 | 1106 | name = __getname(); |
2bad8471 EVH |
1107 | /* build extension */ |
1108 | if (S_ISBLK(mode)) | |
531b1094 | 1109 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1110 | else if (S_ISCHR(mode)) |
531b1094 | 1111 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1112 | else if (S_ISFIFO(mode)) |
531b1094 | 1113 | *name = 0; |
2bad8471 | 1114 | else { |
531b1094 LI |
1115 | __putname(name); |
1116 | return -EINVAL; | |
2bad8471 EVH |
1117 | } |
1118 | ||
531b1094 LI |
1119 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1120 | __putname(name); | |
2bad8471 EVH |
1121 | |
1122 | return retval; | |
1123 | } | |
1124 | ||
b501611a | 1125 | static struct inode_operations v9fs_dir_inode_operations_ext = { |
2bad8471 EVH |
1126 | .create = v9fs_vfs_create, |
1127 | .lookup = v9fs_vfs_lookup, | |
1128 | .symlink = v9fs_vfs_symlink, | |
1129 | .link = v9fs_vfs_link, | |
1130 | .unlink = v9fs_vfs_unlink, | |
1131 | .mkdir = v9fs_vfs_mkdir, | |
1132 | .rmdir = v9fs_vfs_rmdir, | |
1133 | .mknod = v9fs_vfs_mknod, | |
1134 | .rename = v9fs_vfs_rename, | |
1135 | .readlink = v9fs_vfs_readlink, | |
1136 | .getattr = v9fs_vfs_getattr, | |
1137 | .setattr = v9fs_vfs_setattr, | |
1138 | }; | |
1139 | ||
b501611a EVH |
1140 | static struct inode_operations v9fs_dir_inode_operations = { |
1141 | .create = v9fs_vfs_create, | |
1142 | .lookup = v9fs_vfs_lookup, | |
1143 | .unlink = v9fs_vfs_unlink, | |
1144 | .mkdir = v9fs_vfs_mkdir, | |
1145 | .rmdir = v9fs_vfs_rmdir, | |
1146 | .mknod = v9fs_vfs_mknod, | |
1147 | .rename = v9fs_vfs_rename, | |
1148 | .getattr = v9fs_vfs_getattr, | |
1149 | .setattr = v9fs_vfs_setattr, | |
1150 | }; | |
1151 | ||
2bad8471 EVH |
1152 | static struct inode_operations v9fs_file_inode_operations = { |
1153 | .getattr = v9fs_vfs_getattr, | |
1154 | .setattr = v9fs_vfs_setattr, | |
1155 | }; | |
1156 | ||
1157 | static struct inode_operations v9fs_symlink_inode_operations = { | |
1158 | .readlink = v9fs_vfs_readlink, | |
1159 | .follow_link = v9fs_vfs_follow_link, | |
1160 | .put_link = v9fs_vfs_put_link, | |
1161 | .getattr = v9fs_vfs_getattr, | |
1162 | .setattr = v9fs_vfs_setattr, | |
1163 | }; |