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; | |
147b31cf | 180 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
2bad8471 EVH |
181 | |
182 | switch (mode & S_IFMT) { | |
183 | case S_IFIFO: | |
184 | case S_IFBLK: | |
185 | case S_IFCHR: | |
186 | case S_IFSOCK: | |
b501611a EVH |
187 | if(!v9ses->extended) { |
188 | dprintk(DEBUG_ERROR, "special files without extended mode\n"); | |
189 | return ERR_PTR(-EINVAL); | |
190 | } | |
5d58bec5 EVH |
191 | init_special_inode(inode, inode->i_mode, |
192 | inode->i_rdev); | |
193 | break; | |
2bad8471 EVH |
194 | case S_IFREG: |
195 | inode->i_op = &v9fs_file_inode_operations; | |
196 | inode->i_fop = &v9fs_file_operations; | |
197 | break; | |
b501611a EVH |
198 | case S_IFLNK: |
199 | if(!v9ses->extended) { | |
200 | dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n"); | |
201 | return ERR_PTR(-EINVAL); | |
202 | } | |
203 | inode->i_op = &v9fs_symlink_inode_operations; | |
204 | break; | |
2bad8471 EVH |
205 | case S_IFDIR: |
206 | inode->i_nlink++; | |
b501611a EVH |
207 | if(v9ses->extended) |
208 | inode->i_op = &v9fs_dir_inode_operations_ext; | |
209 | else | |
210 | inode->i_op = &v9fs_dir_inode_operations; | |
2bad8471 EVH |
211 | inode->i_fop = &v9fs_dir_operations; |
212 | break; | |
2bad8471 EVH |
213 | default: |
214 | dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", | |
215 | mode, mode & S_IFMT); | |
216 | return ERR_PTR(-EINVAL); | |
217 | } | |
218 | } else { | |
219 | eprintk(KERN_WARNING, "Problem allocating inode\n"); | |
220 | return ERR_PTR(-ENOMEM); | |
221 | } | |
222 | return inode; | |
223 | } | |
224 | ||
225 | /** | |
226 | * v9fs_create - helper function to create files and directories | |
227 | * @dir: directory inode file is being created in | |
228 | * @file_dentry: dentry file is being created in | |
229 | * @perm: permissions file is being created with | |
73c592b9 | 230 | * @open_mode: resulting open mode for file |
2bad8471 EVH |
231 | * |
232 | */ | |
233 | ||
234 | static int | |
235 | v9fs_create(struct inode *dir, | |
236 | struct dentry *file_dentry, | |
237 | unsigned int perm, unsigned int open_mode) | |
238 | { | |
239 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); | |
240 | struct super_block *sb = dir->i_sb; | |
241 | struct v9fs_fid *dirfid = | |
0b8dd177 | 242 | v9fs_fid_lookup(file_dentry->d_parent); |
2bad8471 EVH |
243 | struct v9fs_fid *fid = NULL; |
244 | struct inode *file_inode = NULL; | |
245 | struct v9fs_fcall *fcall = NULL; | |
246 | struct v9fs_qid qid; | |
2bad8471 EVH |
247 | int dirfidnum = -1; |
248 | long newfid = -1; | |
249 | int result = 0; | |
250 | unsigned int iounit = 0; | |
0b8dd177 | 251 | int wfidno = -1; |
3cf6429a | 252 | int err; |
2bad8471 EVH |
253 | |
254 | perm = unixmode2p9mode(v9ses, perm); | |
255 | ||
256 | dprintk(DEBUG_VFS, "dir: %p dentry: %p perm: %o mode: %o\n", dir, | |
257 | file_dentry, perm, open_mode); | |
258 | ||
259 | if (!dirfid) | |
260 | return -EBADF; | |
261 | ||
262 | dirfidnum = dirfid->fid; | |
263 | if (dirfidnum < 0) { | |
264 | dprintk(DEBUG_ERROR, "No fid for the directory #%lu\n", | |
265 | dir->i_ino); | |
266 | return -EBADF; | |
267 | } | |
268 | ||
269 | if (file_dentry->d_inode) { | |
270 | dprintk(DEBUG_ERROR, | |
271 | "Odd. There is an inode for dir %lu, name :%s:\n", | |
272 | dir->i_ino, file_dentry->d_name.name); | |
273 | return -EEXIST; | |
274 | } | |
275 | ||
276 | newfid = v9fs_get_idpool(&v9ses->fidpool); | |
277 | if (newfid < 0) { | |
278 | eprintk(KERN_WARNING, "no free fids available\n"); | |
279 | return -ENOSPC; | |
280 | } | |
281 | ||
282 | result = v9fs_t_walk(v9ses, dirfidnum, newfid, NULL, &fcall); | |
283 | if (result < 0) { | |
531b1094 | 284 | PRINT_FCALL_ERROR("clone error", fcall); |
2bad8471 | 285 | v9fs_put_idpool(newfid, &v9ses->fidpool); |
0b8dd177 | 286 | newfid = -1; |
2bad8471 EVH |
287 | goto CleanUpFid; |
288 | } | |
289 | ||
290 | kfree(fcall); | |
3cf6429a | 291 | fcall = NULL; |
2bad8471 EVH |
292 | |
293 | result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name, | |
294 | perm, open_mode, &fcall); | |
295 | if (result < 0) { | |
531b1094 | 296 | PRINT_FCALL_ERROR("create fails", fcall); |
2bad8471 EVH |
297 | goto CleanUpFid; |
298 | } | |
299 | ||
300 | iounit = fcall->params.rcreate.iounit; | |
301 | qid = fcall->params.rcreate.qid; | |
302 | kfree(fcall); | |
3cf6429a | 303 | fcall = NULL; |
2bad8471 | 304 | |
3cf6429a LI |
305 | if (!(perm&V9FS_DMDIR)) { |
306 | fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1); | |
307 | dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate); | |
308 | if (!fid) { | |
309 | result = -ENOMEM; | |
310 | goto CleanUpFid; | |
311 | } | |
2bad8471 | 312 | |
3cf6429a LI |
313 | fid->qid = qid; |
314 | fid->iounit = iounit; | |
315 | } else { | |
316 | err = v9fs_t_clunk(v9ses, newfid); | |
d8da097a | 317 | newfid = -1; |
3cf6429a LI |
318 | if (err < 0) |
319 | dprintk(DEBUG_ERROR, "clunk for mkdir failed: %d\n", err); | |
320 | } | |
0b8dd177 LI |
321 | |
322 | /* walk to the newly created file and put the fid in the dentry */ | |
323 | wfidno = v9fs_get_idpool(&v9ses->fidpool); | |
d8da097a | 324 | if (wfidno < 0) { |
0b8dd177 LI |
325 | eprintk(KERN_WARNING, "no free fids available\n"); |
326 | return -ENOSPC; | |
327 | } | |
328 | ||
329 | result = v9fs_t_walk(v9ses, dirfidnum, wfidno, | |
3cf6429a | 330 | (char *) file_dentry->d_name.name, &fcall); |
0b8dd177 | 331 | if (result < 0) { |
531b1094 | 332 | PRINT_FCALL_ERROR("clone error", fcall); |
0b8dd177 LI |
333 | v9fs_put_idpool(wfidno, &v9ses->fidpool); |
334 | wfidno = -1; | |
335 | goto CleanUpFid; | |
336 | } | |
3cf6429a LI |
337 | kfree(fcall); |
338 | fcall = NULL; | |
0b8dd177 LI |
339 | |
340 | if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) { | |
3cf6429a | 341 | v9fs_put_idpool(wfidno, &v9ses->fidpool); |
0b8dd177 LI |
342 | |
343 | goto CleanUpFid; | |
344 | } | |
2bad8471 EVH |
345 | |
346 | if ((perm & V9FS_DMSYMLINK) || (perm & V9FS_DMLINK) || | |
347 | (perm & V9FS_DMNAMEDPIPE) || (perm & V9FS_DMSOCKET) || | |
348 | (perm & V9FS_DMDEVICE)) | |
349 | return 0; | |
350 | ||
d8da097a | 351 | result = v9fs_t_stat(v9ses, wfidno, &fcall); |
2bad8471 | 352 | if (result < 0) { |
531b1094 | 353 | PRINT_FCALL_ERROR("stat error", fcall); |
2bad8471 EVH |
354 | goto CleanUpFid; |
355 | } | |
356 | ||
2bad8471 | 357 | |
531b1094 LI |
358 | file_inode = v9fs_get_inode(sb, |
359 | p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode)); | |
360 | ||
2bad8471 EVH |
361 | if ((!file_inode) || IS_ERR(file_inode)) { |
362 | dprintk(DEBUG_ERROR, "create inode failed\n"); | |
363 | result = -EBADF; | |
364 | goto CleanUpFid; | |
365 | } | |
366 | ||
531b1094 | 367 | v9fs_stat2inode(&fcall->params.rstat.stat, file_inode, sb); |
2bad8471 | 368 | kfree(fcall); |
a93a117e LI |
369 | fcall = NULL; |
370 | file_dentry->d_op = &v9fs_dentry_operations; | |
2bad8471 EVH |
371 | d_instantiate(file_dentry, file_inode); |
372 | ||
2bad8471 EVH |
373 | return 0; |
374 | ||
375 | CleanUpFid: | |
376 | kfree(fcall); | |
3cf6429a | 377 | fcall = NULL; |
2bad8471 | 378 | |
0b8dd177 | 379 | if (newfid >= 0) { |
3cf6429a LI |
380 | err = v9fs_t_clunk(v9ses, newfid); |
381 | if (err < 0) | |
382 | dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); | |
0b8dd177 LI |
383 | } |
384 | if (wfidno >= 0) { | |
3cf6429a LI |
385 | err = v9fs_t_clunk(v9ses, wfidno); |
386 | if (err < 0) | |
387 | dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); | |
2bad8471 EVH |
388 | } |
389 | return result; | |
390 | } | |
391 | ||
392 | /** | |
393 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 EVH |
394 | * @dir: directory inode that is being deleted |
395 | * @file: dentry that is being deleted | |
396 | * @rmdir: removing a directory | |
2bad8471 EVH |
397 | * |
398 | */ | |
399 | ||
400 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) | |
401 | { | |
402 | struct v9fs_fcall *fcall = NULL; | |
403 | struct super_block *sb = NULL; | |
404 | struct v9fs_session_info *v9ses = NULL; | |
405 | struct v9fs_fid *v9fid = NULL; | |
406 | struct inode *file_inode = NULL; | |
407 | int fid = -1; | |
408 | int result = 0; | |
409 | ||
410 | dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, | |
411 | rmdir); | |
412 | ||
413 | file_inode = file->d_inode; | |
414 | sb = file_inode->i_sb; | |
415 | v9ses = v9fs_inode2v9ses(file_inode); | |
0b8dd177 | 416 | v9fid = v9fs_fid_lookup(file); |
2bad8471 EVH |
417 | |
418 | if (!v9fid) { | |
419 | dprintk(DEBUG_ERROR, | |
420 | "no v9fs_fid\n"); | |
421 | return -EBADF; | |
422 | } | |
423 | ||
424 | fid = v9fid->fid; | |
425 | if (fid < 0) { | |
426 | dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n", | |
427 | file_inode->i_ino); | |
428 | return -EBADF; | |
429 | } | |
430 | ||
431 | result = v9fs_t_remove(v9ses, fid, &fcall); | |
531b1094 LI |
432 | if (result < 0) { |
433 | PRINT_FCALL_ERROR("remove fails", fcall); | |
434 | } else { | |
2bad8471 EVH |
435 | v9fs_put_idpool(fid, &v9ses->fidpool); |
436 | v9fs_fid_destroy(v9fid); | |
437 | } | |
438 | ||
439 | kfree(fcall); | |
440 | return result; | |
441 | } | |
442 | ||
443 | /** | |
444 | * v9fs_vfs_create - VFS hook to create files | |
445 | * @inode: directory inode that is being deleted | |
446 | * @dentry: dentry that is being deleted | |
447 | * @perm: create permissions | |
448 | * @nd: path information | |
449 | * | |
450 | */ | |
451 | ||
452 | static int | |
453 | v9fs_vfs_create(struct inode *inode, struct dentry *dentry, int perm, | |
454 | struct nameidata *nd) | |
455 | { | |
456 | return v9fs_create(inode, dentry, perm, O_RDWR); | |
457 | } | |
458 | ||
459 | /** | |
460 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
73c592b9 | 461 | * @inode: inode that is being unlinked |
2bad8471 EVH |
462 | * @dentry: dentry that is being unlinked |
463 | * @mode: mode for new directory | |
464 | * | |
465 | */ | |
466 | ||
467 | static int v9fs_vfs_mkdir(struct inode *inode, struct dentry *dentry, int mode) | |
468 | { | |
469 | return v9fs_create(inode, dentry, mode | S_IFDIR, O_RDONLY); | |
470 | } | |
471 | ||
472 | /** | |
473 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
474 | * @dir: inode that is being walked from | |
475 | * @dentry: dentry that is being walked to? | |
476 | * @nameidata: path data | |
477 | * | |
478 | */ | |
479 | ||
480 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, | |
481 | struct nameidata *nameidata) | |
482 | { | |
483 | struct super_block *sb; | |
484 | struct v9fs_session_info *v9ses; | |
485 | struct v9fs_fid *dirfid; | |
486 | struct v9fs_fid *fid; | |
487 | struct inode *inode; | |
488 | struct v9fs_fcall *fcall = NULL; | |
2bad8471 EVH |
489 | int dirfidnum = -1; |
490 | int newfid = -1; | |
491 | int result = 0; | |
492 | ||
493 | dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", | |
494 | dir, dentry->d_iname, dentry, nameidata); | |
495 | ||
496 | sb = dir->i_sb; | |
497 | v9ses = v9fs_inode2v9ses(dir); | |
0b8dd177 | 498 | dirfid = v9fs_fid_lookup(dentry->d_parent); |
2bad8471 EVH |
499 | |
500 | if (!dirfid) { | |
501 | dprintk(DEBUG_ERROR, "no dirfid\n"); | |
502 | return ERR_PTR(-EINVAL); | |
503 | } | |
504 | ||
505 | dirfidnum = dirfid->fid; | |
506 | ||
507 | if (dirfidnum < 0) { | |
508 | dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n", | |
509 | dir, dir->i_ino); | |
510 | return ERR_PTR(-EBADF); | |
511 | } | |
512 | ||
513 | newfid = v9fs_get_idpool(&v9ses->fidpool); | |
514 | if (newfid < 0) { | |
515 | eprintk(KERN_WARNING, "newfid fails!\n"); | |
516 | return ERR_PTR(-ENOSPC); | |
517 | } | |
518 | ||
519 | result = | |
520 | v9fs_t_walk(v9ses, dirfidnum, newfid, (char *)dentry->d_name.name, | |
521 | NULL); | |
522 | if (result < 0) { | |
523 | v9fs_put_idpool(newfid, &v9ses->fidpool); | |
524 | if (result == -ENOENT) { | |
525 | d_add(dentry, NULL); | |
0b8dd177 | 526 | dprintk(DEBUG_VFS, |
2bad8471 EVH |
527 | "Return negative dentry %p count %d\n", |
528 | dentry, atomic_read(&dentry->d_count)); | |
529 | return NULL; | |
530 | } | |
531 | dprintk(DEBUG_ERROR, "walk error:%d\n", result); | |
532 | goto FreeFcall; | |
533 | } | |
534 | ||
535 | result = v9fs_t_stat(v9ses, newfid, &fcall); | |
536 | if (result < 0) { | |
537 | dprintk(DEBUG_ERROR, "stat error\n"); | |
538 | goto FreeFcall; | |
539 | } | |
540 | ||
531b1094 LI |
541 | inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses, |
542 | fcall->params.rstat.stat.mode)); | |
2bad8471 EVH |
543 | |
544 | if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) { | |
545 | eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n", | |
546 | PTR_ERR(inode)); | |
547 | ||
548 | result = -ENOSPC; | |
549 | goto FreeFcall; | |
550 | } | |
551 | ||
531b1094 | 552 | inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid); |
2bad8471 | 553 | |
0b8dd177 | 554 | fid = v9fs_fid_create(dentry, v9ses, newfid, 0); |
2bad8471 EVH |
555 | if (fid == NULL) { |
556 | dprintk(DEBUG_ERROR, "couldn't insert\n"); | |
557 | result = -ENOMEM; | |
558 | goto FreeFcall; | |
559 | } | |
560 | ||
531b1094 | 561 | fid->qid = fcall->params.rstat.stat.qid; |
2bad8471 EVH |
562 | |
563 | dentry->d_op = &v9fs_dentry_operations; | |
531b1094 | 564 | v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb); |
2bad8471 EVH |
565 | |
566 | d_add(dentry, inode); | |
567 | kfree(fcall); | |
568 | ||
569 | return NULL; | |
570 | ||
571 | FreeFcall: | |
572 | kfree(fcall); | |
573 | return ERR_PTR(result); | |
574 | } | |
575 | ||
576 | /** | |
577 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
578 | * @i: inode that is being unlinked | |
73c592b9 | 579 | * @d: dentry that is being unlinked |
2bad8471 EVH |
580 | * |
581 | */ | |
582 | ||
583 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) | |
584 | { | |
585 | return v9fs_remove(i, d, 0); | |
586 | } | |
587 | ||
588 | /** | |
589 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
590 | * @i: inode that is being unlinked | |
73c592b9 | 591 | * @d: dentry that is being unlinked |
2bad8471 EVH |
592 | * |
593 | */ | |
594 | ||
595 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) | |
596 | { | |
597 | return v9fs_remove(i, d, 1); | |
598 | } | |
599 | ||
600 | /** | |
601 | * v9fs_vfs_rename - VFS hook to rename an inode | |
602 | * @old_dir: old dir inode | |
603 | * @old_dentry: old dentry | |
604 | * @new_dir: new dir inode | |
605 | * @new_dentry: new dentry | |
606 | * | |
607 | */ | |
608 | ||
609 | static int | |
610 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
611 | struct inode *new_dir, struct dentry *new_dentry) | |
612 | { | |
613 | struct inode *old_inode = old_dentry->d_inode; | |
614 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); | |
0b8dd177 | 615 | struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry); |
2bad8471 | 616 | struct v9fs_fid *olddirfid = |
0b8dd177 | 617 | v9fs_fid_lookup(old_dentry->d_parent); |
2bad8471 | 618 | struct v9fs_fid *newdirfid = |
0b8dd177 | 619 | v9fs_fid_lookup(new_dentry->d_parent); |
531b1094 | 620 | struct v9fs_wstat wstat; |
2bad8471 EVH |
621 | struct v9fs_fcall *fcall = NULL; |
622 | int fid = -1; | |
623 | int olddirfidnum = -1; | |
624 | int newdirfidnum = -1; | |
625 | int retval = 0; | |
626 | ||
627 | dprintk(DEBUG_VFS, "\n"); | |
628 | ||
629 | if ((!oldfid) || (!olddirfid) || (!newdirfid)) { | |
630 | dprintk(DEBUG_ERROR, "problem with arguments\n"); | |
631 | return -EBADF; | |
632 | } | |
633 | ||
634 | /* 9P can only handle file rename in the same directory */ | |
635 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { | |
636 | dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); | |
637 | retval = -EPERM; | |
638 | goto FreeFcallnBail; | |
639 | } | |
640 | ||
641 | fid = oldfid->fid; | |
642 | olddirfidnum = olddirfid->fid; | |
643 | newdirfidnum = newdirfid->fid; | |
644 | ||
645 | if (fid < 0) { | |
646 | dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", | |
647 | old_inode->i_ino); | |
648 | retval = -EBADF; | |
649 | goto FreeFcallnBail; | |
650 | } | |
651 | ||
531b1094 LI |
652 | v9fs_blank_wstat(&wstat); |
653 | wstat.muid = v9ses->name; | |
654 | wstat.name = (char *) new_dentry->d_name.name; | |
2bad8471 | 655 | |
531b1094 | 656 | retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall); |
2bad8471 EVH |
657 | |
658 | FreeFcallnBail: | |
2bad8471 | 659 | if (retval < 0) |
531b1094 | 660 | PRINT_FCALL_ERROR("wstat error", fcall); |
2bad8471 EVH |
661 | |
662 | kfree(fcall); | |
663 | return retval; | |
664 | } | |
665 | ||
666 | /** | |
943ffb58 | 667 | * v9fs_vfs_getattr - retrieve file metadata |
2bad8471 EVH |
668 | * @mnt - mount information |
669 | * @dentry - file to get attributes on | |
670 | * @stat - metadata structure to populate | |
671 | * | |
672 | */ | |
673 | ||
674 | static int | |
675 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
676 | struct kstat *stat) | |
677 | { | |
678 | struct v9fs_fcall *fcall = NULL; | |
679 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 680 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 EVH |
681 | int err = -EPERM; |
682 | ||
683 | dprintk(DEBUG_VFS, "dentry: %p\n", dentry); | |
684 | if (!fid) { | |
685 | dprintk(DEBUG_ERROR, | |
686 | "couldn't find fid associated with dentry\n"); | |
687 | return -EBADF; | |
688 | } | |
689 | ||
690 | err = v9fs_t_stat(v9ses, fid->fid, &fcall); | |
691 | ||
692 | if (err < 0) | |
693 | dprintk(DEBUG_ERROR, "stat error\n"); | |
694 | else { | |
531b1094 | 695 | v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode, |
2bad8471 EVH |
696 | dentry->d_inode->i_sb); |
697 | generic_fillattr(dentry->d_inode, stat); | |
698 | } | |
699 | ||
700 | kfree(fcall); | |
701 | return err; | |
702 | } | |
703 | ||
704 | /** | |
705 | * v9fs_vfs_setattr - set file metadata | |
706 | * @dentry: file whose metadata to set | |
707 | * @iattr: metadata assignment structure | |
708 | * | |
709 | */ | |
710 | ||
711 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
712 | { | |
713 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 714 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 | 715 | struct v9fs_fcall *fcall = NULL; |
531b1094 | 716 | struct v9fs_wstat wstat; |
2bad8471 EVH |
717 | int res = -EPERM; |
718 | ||
719 | dprintk(DEBUG_VFS, "\n"); | |
73c592b9 | 720 | |
2bad8471 EVH |
721 | if (!fid) { |
722 | dprintk(DEBUG_ERROR, | |
723 | "Couldn't find fid associated with dentry\n"); | |
724 | return -EBADF; | |
725 | } | |
726 | ||
531b1094 | 727 | v9fs_blank_wstat(&wstat); |
2bad8471 | 728 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 729 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
730 | |
731 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 732 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
733 | |
734 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 735 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
736 | |
737 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 738 | wstat.length = iattr->ia_size; |
2bad8471 EVH |
739 | |
740 | if (v9ses->extended) { | |
531b1094 LI |
741 | if (iattr->ia_valid & ATTR_UID) |
742 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 743 | |
531b1094 LI |
744 | if (iattr->ia_valid & ATTR_GID) |
745 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 EVH |
746 | } |
747 | ||
531b1094 | 748 | res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); |
2bad8471 EVH |
749 | |
750 | if (res < 0) | |
531b1094 | 751 | PRINT_FCALL_ERROR("wstat error", fcall); |
2bad8471 | 752 | |
2bad8471 | 753 | kfree(fcall); |
2bad8471 EVH |
754 | if (res >= 0) |
755 | res = inode_setattr(dentry->d_inode, iattr); | |
756 | ||
757 | return res; | |
758 | } | |
759 | ||
760 | /** | |
531b1094 LI |
761 | * v9fs_stat2inode - populate an inode structure with mistat info |
762 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
763 | * @inode: inode to populate |
764 | * @sb: superblock of filesystem | |
765 | * | |
766 | */ | |
767 | ||
768 | void | |
531b1094 LI |
769 | v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, |
770 | struct super_block *sb) | |
2bad8471 | 771 | { |
1dac06b2 | 772 | int n; |
531b1094 | 773 | char ext[32]; |
2bad8471 EVH |
774 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
775 | ||
776 | inode->i_nlink = 1; | |
777 | ||
531b1094 LI |
778 | inode->i_atime.tv_sec = stat->atime; |
779 | inode->i_mtime.tv_sec = stat->mtime; | |
780 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 781 | |
531b1094 LI |
782 | inode->i_uid = v9ses->uid; |
783 | inode->i_gid = v9ses->gid; | |
2bad8471 EVH |
784 | |
785 | if (v9ses->extended) { | |
531b1094 LI |
786 | inode->i_uid = stat->n_uid; |
787 | inode->i_gid = stat->n_gid; | |
2bad8471 EVH |
788 | } |
789 | ||
531b1094 | 790 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
2bad8471 EVH |
791 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
792 | char type = 0; | |
793 | int major = -1; | |
794 | int minor = -1; | |
531b1094 | 795 | |
1dac06b2 LI |
796 | n = stat->extension.len; |
797 | if (n > sizeof(ext)-1) | |
798 | n = sizeof(ext)-1; | |
799 | memmove(ext, stat->extension.str, n); | |
800 | ext[n] = 0; | |
531b1094 | 801 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
2bad8471 EVH |
802 | switch (type) { |
803 | case 'c': | |
804 | inode->i_mode &= ~S_IFBLK; | |
805 | inode->i_mode |= S_IFCHR; | |
806 | break; | |
807 | case 'b': | |
808 | break; | |
809 | default: | |
531b1094 LI |
810 | dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n", |
811 | type, stat->extension.len, stat->extension.str); | |
2bad8471 EVH |
812 | }; |
813 | inode->i_rdev = MKDEV(major, minor); | |
814 | } else | |
815 | inode->i_rdev = 0; | |
816 | ||
531b1094 | 817 | inode->i_size = stat->length; |
2bad8471 EVH |
818 | |
819 | inode->i_blksize = sb->s_blocksize; | |
820 | inode->i_blocks = | |
821 | (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits; | |
822 | } | |
823 | ||
824 | /** | |
825 | * v9fs_qid2ino - convert qid into inode number | |
826 | * @qid: qid to hash | |
827 | * | |
828 | * BUG: potential for inode number collisions? | |
829 | */ | |
830 | ||
831 | ino_t v9fs_qid2ino(struct v9fs_qid *qid) | |
832 | { | |
833 | u64 path = qid->path + 2; | |
834 | ino_t i = 0; | |
835 | ||
836 | if (sizeof(ino_t) == sizeof(path)) | |
837 | memcpy(&i, &path, sizeof(ino_t)); | |
838 | else | |
839 | i = (ino_t) (path ^ (path >> 32)); | |
840 | ||
841 | return i; | |
842 | } | |
843 | ||
2bad8471 EVH |
844 | /** |
845 | * v9fs_readlink - read a symlink's location (internal version) | |
846 | * @dentry: dentry for symlink | |
73c592b9 | 847 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
848 | * @buflen: length of buffer |
849 | * | |
850 | */ | |
851 | ||
852 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
853 | { | |
854 | int retval = -EPERM; | |
855 | ||
856 | struct v9fs_fcall *fcall = NULL; | |
857 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
0b8dd177 | 858 | struct v9fs_fid *fid = v9fs_fid_lookup(dentry); |
2bad8471 EVH |
859 | |
860 | if (!fid) { | |
861 | dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n"); | |
862 | retval = -EBADF; | |
863 | goto FreeFcall; | |
864 | } | |
865 | ||
866 | if (!v9ses->extended) { | |
867 | retval = -EBADF; | |
868 | dprintk(DEBUG_ERROR, "not extended\n"); | |
869 | goto FreeFcall; | |
870 | } | |
871 | ||
872 | dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); | |
873 | retval = v9fs_t_stat(v9ses, fid->fid, &fcall); | |
874 | ||
875 | if (retval < 0) { | |
876 | dprintk(DEBUG_ERROR, "stat error\n"); | |
877 | goto FreeFcall; | |
878 | } | |
879 | ||
880 | if (!fcall) | |
881 | return -EIO; | |
882 | ||
531b1094 | 883 | if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) { |
2bad8471 EVH |
884 | retval = -EINVAL; |
885 | goto FreeFcall; | |
886 | } | |
887 | ||
888 | /* copy extension buffer into buffer */ | |
93c615fe LI |
889 | if (fcall->params.rstat.stat.extension.len+1 < buflen) |
890 | buflen = fcall->params.rstat.stat.extension.len + 1; | |
2bad8471 | 891 | |
531b1094 LI |
892 | memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); |
893 | buffer[buflen-1] = 0; | |
2bad8471 EVH |
894 | |
895 | retval = buflen; | |
896 | ||
897 | FreeFcall: | |
898 | kfree(fcall); | |
899 | ||
900 | return retval; | |
901 | } | |
902 | ||
903 | /** | |
904 | * v9fs_vfs_readlink - read a symlink's location | |
905 | * @dentry: dentry for symlink | |
906 | * @buf: buffer to load symlink location into | |
907 | * @buflen: length of buffer | |
908 | * | |
909 | */ | |
910 | ||
911 | static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, | |
912 | int buflen) | |
913 | { | |
914 | int retval; | |
915 | int ret; | |
916 | char *link = __getname(); | |
917 | ||
a1f9d8d2 LI |
918 | if (buflen > PATH_MAX) |
919 | buflen = PATH_MAX; | |
2bad8471 EVH |
920 | |
921 | dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); | |
922 | ||
923 | retval = v9fs_readlink(dentry, link, buflen); | |
924 | ||
925 | if (retval > 0) { | |
926 | if ((ret = copy_to_user(buffer, link, retval)) != 0) { | |
927 | dprintk(DEBUG_ERROR, "problem copying to user: %d\n", | |
928 | ret); | |
929 | retval = ret; | |
930 | } | |
931 | } | |
932 | ||
ce44eeb6 | 933 | __putname(link); |
2bad8471 EVH |
934 | return retval; |
935 | } | |
936 | ||
937 | /** | |
938 | * v9fs_vfs_follow_link - follow a symlink path | |
939 | * @dentry: dentry for symlink | |
940 | * @nd: nameidata | |
941 | * | |
942 | */ | |
943 | ||
944 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
945 | { | |
946 | int len = 0; | |
947 | char *link = __getname(); | |
948 | ||
949 | dprintk(DEBUG_VFS, "%s n", dentry->d_name.name); | |
950 | ||
951 | if (!link) | |
952 | link = ERR_PTR(-ENOMEM); | |
953 | else { | |
93c615fe | 954 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
955 | |
956 | if (len < 0) { | |
ce44eeb6 | 957 | __putname(link); |
2bad8471 EVH |
958 | link = ERR_PTR(len); |
959 | } else | |
960 | link[len] = 0; | |
961 | } | |
962 | nd_set_link(nd, link); | |
963 | ||
964 | return NULL; | |
965 | } | |
966 | ||
967 | /** | |
968 | * v9fs_vfs_put_link - release a symlink path | |
969 | * @dentry: dentry for symlink | |
970 | * @nd: nameidata | |
971 | * | |
972 | */ | |
973 | ||
974 | static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) | |
975 | { | |
976 | char *s = nd_get_link(nd); | |
977 | ||
978 | dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); | |
979 | if (!IS_ERR(s)) | |
ce44eeb6 | 980 | __putname(s); |
2bad8471 EVH |
981 | } |
982 | ||
531b1094 LI |
983 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
984 | int mode, const char *extension) | |
2bad8471 | 985 | { |
531b1094 LI |
986 | int err, retval; |
987 | struct v9fs_session_info *v9ses; | |
988 | struct v9fs_fcall *fcall; | |
989 | struct v9fs_fid *fid; | |
990 | struct v9fs_wstat wstat; | |
2bad8471 | 991 | |
531b1094 LI |
992 | v9ses = v9fs_inode2v9ses(dir); |
993 | retval = -EPERM; | |
994 | fcall = NULL; | |
2bad8471 EVH |
995 | |
996 | if (!v9ses->extended) { | |
997 | dprintk(DEBUG_ERROR, "not extended\n"); | |
531b1094 | 998 | goto free_mem; |
2bad8471 EVH |
999 | } |
1000 | ||
2bad8471 | 1001 | /* issue a create */ |
531b1094 | 1002 | retval = v9fs_create(dir, dentry, mode, 0); |
2bad8471 | 1003 | if (retval != 0) |
531b1094 | 1004 | goto free_mem; |
2bad8471 | 1005 | |
531b1094 LI |
1006 | fid = v9fs_fid_get_created(dentry); |
1007 | if (!fid) { | |
2bad8471 | 1008 | dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n"); |
531b1094 | 1009 | goto free_mem; |
2bad8471 EVH |
1010 | } |
1011 | ||
531b1094 LI |
1012 | /* issue a Twstat */ |
1013 | v9fs_blank_wstat(&wstat); | |
1014 | wstat.muid = v9ses->name; | |
1015 | wstat.extension = (char *) extension; | |
1016 | retval = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); | |
2bad8471 | 1017 | if (retval < 0) { |
531b1094 LI |
1018 | PRINT_FCALL_ERROR("wstat error", fcall); |
1019 | goto free_mem; | |
2bad8471 EVH |
1020 | } |
1021 | ||
531b1094 | 1022 | err = v9fs_t_clunk(v9ses, fid->fid); |
3cf6429a | 1023 | if (err < 0) { |
531b1094 LI |
1024 | dprintk(DEBUG_ERROR, "clunk failed: %d\n", err); |
1025 | goto free_mem; | |
2bad8471 EVH |
1026 | } |
1027 | ||
1028 | d_drop(dentry); /* FID - will this also clunk? */ | |
1029 | ||
531b1094 | 1030 | free_mem: |
2bad8471 | 1031 | kfree(fcall); |
531b1094 LI |
1032 | return retval; |
1033 | } | |
1034 | ||
1035 | /** | |
1036 | * v9fs_vfs_symlink - helper function to create symlinks | |
1037 | * @dir: directory inode containing symlink | |
1038 | * @dentry: dentry for symlink | |
1039 | * @symname: symlink data | |
1040 | * | |
1041 | * See 9P2000.u RFC for more information | |
1042 | * | |
1043 | */ | |
1044 | ||
1045 | static int | |
1046 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1047 | { | |
1048 | dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
1049 | symname); | |
1050 | ||
1051 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); | |
1052 | } | |
1053 | ||
1054 | /** | |
1055 | * v9fs_vfs_link - create a hardlink | |
1056 | * @old_dentry: dentry for file to link to | |
1057 | * @dir: inode destination for new link | |
1058 | * @dentry: dentry for link | |
1059 | * | |
1060 | */ | |
1061 | ||
1062 | /* XXX - lots of code dup'd from symlink and creates, | |
1063 | * figure out a better reuse strategy | |
1064 | */ | |
1065 | ||
1066 | static int | |
1067 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1068 | struct dentry *dentry) | |
1069 | { | |
1070 | int retval; | |
1071 | struct v9fs_fid *oldfid; | |
1072 | char *name; | |
1073 | ||
1074 | dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
1075 | old_dentry->d_name.name); | |
1076 | ||
1077 | oldfid = v9fs_fid_lookup(old_dentry); | |
1078 | if (!oldfid) { | |
1079 | dprintk(DEBUG_ERROR, "can't find oldfid\n"); | |
1080 | return -EPERM; | |
1081 | } | |
1082 | ||
1083 | name = __getname(); | |
1084 | sprintf(name, "hardlink(%d)\n", oldfid->fid); | |
1085 | retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name); | |
1086 | __putname(name); | |
2bad8471 | 1087 | |
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 EVH |
1105 | |
1106 | dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
1107 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); | |
1108 | ||
531b1094 LI |
1109 | if (!new_valid_dev(rdev)) |
1110 | return -EINVAL; | |
2bad8471 | 1111 | |
531b1094 | 1112 | name = __getname(); |
2bad8471 EVH |
1113 | /* build extension */ |
1114 | if (S_ISBLK(mode)) | |
531b1094 | 1115 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1116 | else if (S_ISCHR(mode)) |
531b1094 | 1117 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1118 | else if (S_ISFIFO(mode)) |
531b1094 | 1119 | *name = 0; |
2bad8471 | 1120 | else { |
531b1094 LI |
1121 | __putname(name); |
1122 | return -EINVAL; | |
2bad8471 EVH |
1123 | } |
1124 | ||
531b1094 LI |
1125 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1126 | __putname(name); | |
2bad8471 EVH |
1127 | |
1128 | return retval; | |
1129 | } | |
1130 | ||
b501611a | 1131 | static struct inode_operations v9fs_dir_inode_operations_ext = { |
2bad8471 EVH |
1132 | .create = v9fs_vfs_create, |
1133 | .lookup = v9fs_vfs_lookup, | |
1134 | .symlink = v9fs_vfs_symlink, | |
1135 | .link = v9fs_vfs_link, | |
1136 | .unlink = v9fs_vfs_unlink, | |
1137 | .mkdir = v9fs_vfs_mkdir, | |
1138 | .rmdir = v9fs_vfs_rmdir, | |
1139 | .mknod = v9fs_vfs_mknod, | |
1140 | .rename = v9fs_vfs_rename, | |
1141 | .readlink = v9fs_vfs_readlink, | |
1142 | .getattr = v9fs_vfs_getattr, | |
1143 | .setattr = v9fs_vfs_setattr, | |
1144 | }; | |
1145 | ||
b501611a EVH |
1146 | static struct inode_operations v9fs_dir_inode_operations = { |
1147 | .create = v9fs_vfs_create, | |
1148 | .lookup = v9fs_vfs_lookup, | |
1149 | .unlink = v9fs_vfs_unlink, | |
1150 | .mkdir = v9fs_vfs_mkdir, | |
1151 | .rmdir = v9fs_vfs_rmdir, | |
1152 | .mknod = v9fs_vfs_mknod, | |
1153 | .rename = v9fs_vfs_rename, | |
1154 | .getattr = v9fs_vfs_getattr, | |
1155 | .setattr = v9fs_vfs_setattr, | |
1156 | }; | |
1157 | ||
2bad8471 EVH |
1158 | static struct inode_operations v9fs_file_inode_operations = { |
1159 | .getattr = v9fs_vfs_getattr, | |
1160 | .setattr = v9fs_vfs_setattr, | |
1161 | }; | |
1162 | ||
1163 | static struct inode_operations v9fs_symlink_inode_operations = { | |
1164 | .readlink = v9fs_vfs_readlink, | |
1165 | .follow_link = v9fs_vfs_follow_link, | |
1166 | .put_link = v9fs_vfs_put_link, | |
1167 | .getattr = v9fs_vfs_getattr, | |
1168 | .setattr = v9fs_vfs_setattr, | |
1169 | }; |