Commit | Line | Data |
---|---|---|
2bad8471 EVH |
1 | /* |
2 | * linux/fs/9p/vfs_inode.c | |
3 | * | |
73c592b9 | 4 | * This file contains vfs inode ops for the 9P2000 protocol. |
2bad8471 EVH |
5 | * |
6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
42e8c509 EVH |
10 | * it under the terms of the GNU General Public License version 2 |
11 | * as published by the Free Software Foundation. | |
2bad8471 EVH |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/file.h> | |
30 | #include <linux/pagemap.h> | |
31 | #include <linux/stat.h> | |
32 | #include <linux/string.h> | |
2bad8471 EVH |
33 | #include <linux/inet.h> |
34 | #include <linux/namei.h> | |
35 | #include <linux/idr.h> | |
e8edc6e0 | 36 | #include <linux/sched.h> |
bd238fb4 LI |
37 | #include <net/9p/9p.h> |
38 | #include <net/9p/client.h> | |
2bad8471 | 39 | |
2bad8471 | 40 | #include "v9fs.h" |
2bad8471 | 41 | #include "v9fs_vfs.h" |
2bad8471 EVH |
42 | #include "fid.h" |
43 | ||
754661f1 AV |
44 | static const struct inode_operations v9fs_dir_inode_operations; |
45 | static const struct inode_operations v9fs_dir_inode_operations_ext; | |
46 | static const struct inode_operations v9fs_file_inode_operations; | |
47 | static const struct inode_operations v9fs_symlink_inode_operations; | |
2bad8471 EVH |
48 | |
49 | /** | |
50 | * unixmode2p9mode - convert unix mode bits to plan 9 | |
51 | * @v9ses: v9fs session information | |
52 | * @mode: mode to convert | |
53 | * | |
54 | */ | |
55 | ||
73c592b9 | 56 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
57 | { |
58 | int res; | |
59 | res = mode & 0777; | |
60 | if (S_ISDIR(mode)) | |
bd238fb4 | 61 | res |= P9_DMDIR; |
2405669b | 62 | if (v9fs_extended(v9ses)) { |
2bad8471 | 63 | if (S_ISLNK(mode)) |
bd238fb4 | 64 | res |= P9_DMSYMLINK; |
2bad8471 EVH |
65 | if (v9ses->nodev == 0) { |
66 | if (S_ISSOCK(mode)) | |
bd238fb4 | 67 | res |= P9_DMSOCKET; |
2bad8471 | 68 | if (S_ISFIFO(mode)) |
bd238fb4 | 69 | res |= P9_DMNAMEDPIPE; |
2bad8471 | 70 | if (S_ISBLK(mode)) |
bd238fb4 | 71 | res |= P9_DMDEVICE; |
2bad8471 | 72 | if (S_ISCHR(mode)) |
bd238fb4 | 73 | res |= P9_DMDEVICE; |
2bad8471 EVH |
74 | } |
75 | ||
76 | if ((mode & S_ISUID) == S_ISUID) | |
bd238fb4 | 77 | res |= P9_DMSETUID; |
2bad8471 | 78 | if ((mode & S_ISGID) == S_ISGID) |
bd238fb4 | 79 | res |= P9_DMSETGID; |
d199d652 AL |
80 | if ((mode & S_ISVTX) == S_ISVTX) |
81 | res |= P9_DMSETVTX; | |
bd238fb4 LI |
82 | if ((mode & P9_DMLINK)) |
83 | res |= P9_DMLINK; | |
2bad8471 EVH |
84 | } |
85 | ||
86 | return res; | |
87 | } | |
88 | ||
89 | /** | |
90 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits | |
91 | * @v9ses: v9fs session information | |
92 | * @mode: mode to convert | |
93 | * | |
94 | */ | |
95 | ||
73c592b9 | 96 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
2bad8471 EVH |
97 | { |
98 | int res; | |
99 | ||
100 | res = mode & 0777; | |
101 | ||
bd238fb4 | 102 | if ((mode & P9_DMDIR) == P9_DMDIR) |
2bad8471 | 103 | res |= S_IFDIR; |
2405669b | 104 | else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses))) |
2bad8471 | 105 | res |= S_IFLNK; |
2405669b | 106 | else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses)) |
2bad8471 EVH |
107 | && (v9ses->nodev == 0)) |
108 | res |= S_IFSOCK; | |
2405669b | 109 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses)) |
2bad8471 EVH |
110 | && (v9ses->nodev == 0)) |
111 | res |= S_IFIFO; | |
2405669b | 112 | else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses)) |
2bad8471 EVH |
113 | && (v9ses->nodev == 0)) |
114 | res |= S_IFBLK; | |
115 | else | |
116 | res |= S_IFREG; | |
117 | ||
2405669b | 118 | if (v9fs_extended(v9ses)) { |
bd238fb4 | 119 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
2bad8471 EVH |
120 | res |= S_ISUID; |
121 | ||
bd238fb4 | 122 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
2bad8471 | 123 | res |= S_ISGID; |
d199d652 AL |
124 | |
125 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) | |
126 | res |= S_ISVTX; | |
2bad8471 EVH |
127 | } |
128 | ||
129 | return res; | |
130 | } | |
131 | ||
ee443996 EVH |
132 | /** |
133 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits | |
134 | * @uflags: flags to convert | |
2e4bef41 | 135 | * @extended: if .u extensions are active |
ee443996 EVH |
136 | */ |
137 | ||
2e4bef41 | 138 | int v9fs_uflags2omode(int uflags, int extended) |
6a3124a3 LI |
139 | { |
140 | int ret; | |
141 | ||
142 | ret = 0; | |
143 | switch (uflags&3) { | |
144 | default: | |
145 | case O_RDONLY: | |
bd238fb4 | 146 | ret = P9_OREAD; |
6a3124a3 LI |
147 | break; |
148 | ||
149 | case O_WRONLY: | |
bd238fb4 | 150 | ret = P9_OWRITE; |
6a3124a3 LI |
151 | break; |
152 | ||
153 | case O_RDWR: | |
bd238fb4 | 154 | ret = P9_ORDWR; |
6a3124a3 LI |
155 | break; |
156 | } | |
157 | ||
6a3124a3 | 158 | if (uflags & O_TRUNC) |
bd238fb4 | 159 | ret |= P9_OTRUNC; |
6a3124a3 | 160 | |
2e4bef41 EVH |
161 | if (extended) { |
162 | if (uflags & O_EXCL) | |
163 | ret |= P9_OEXCL; | |
164 | ||
165 | if (uflags & O_APPEND) | |
166 | ret |= P9_OAPPEND; | |
167 | } | |
6a3124a3 LI |
168 | |
169 | return ret; | |
170 | } | |
171 | ||
2bad8471 | 172 | /** |
531b1094 | 173 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
2bad8471 | 174 | * @v9ses: 9P session info (for determining extended mode) |
531b1094 | 175 | * @wstat: structure to initialize |
2bad8471 EVH |
176 | * |
177 | */ | |
178 | ||
73c592b9 | 179 | static void |
bd238fb4 | 180 | v9fs_blank_wstat(struct p9_wstat *wstat) |
2bad8471 | 181 | { |
531b1094 LI |
182 | wstat->type = ~0; |
183 | wstat->dev = ~0; | |
184 | wstat->qid.type = ~0; | |
185 | wstat->qid.version = ~0; | |
186 | *((long long *)&wstat->qid.path) = ~0; | |
187 | wstat->mode = ~0; | |
188 | wstat->atime = ~0; | |
189 | wstat->mtime = ~0; | |
190 | wstat->length = ~0; | |
191 | wstat->name = NULL; | |
192 | wstat->uid = NULL; | |
193 | wstat->gid = NULL; | |
194 | wstat->muid = NULL; | |
195 | wstat->n_uid = ~0; | |
196 | wstat->n_gid = ~0; | |
197 | wstat->n_muid = ~0; | |
198 | wstat->extension = NULL; | |
2bad8471 EVH |
199 | } |
200 | ||
201 | /** | |
202 | * v9fs_get_inode - helper function to setup an inode | |
203 | * @sb: superblock | |
204 | * @mode: mode to setup inode with | |
205 | * | |
206 | */ | |
207 | ||
208 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) | |
209 | { | |
2bb54115 | 210 | int err; |
6a3124a3 | 211 | struct inode *inode; |
b501611a | 212 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
2bad8471 | 213 | |
bd238fb4 | 214 | P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
2bad8471 EVH |
215 | |
216 | inode = new_inode(sb); | |
2bb54115 AK |
217 | if (!inode) { |
218 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); | |
219 | return -ENOMEM; | |
220 | } | |
221 | ||
222 | inode->i_mode = mode; | |
223 | inode->i_uid = current_fsuid(); | |
224 | inode->i_gid = current_fsgid(); | |
225 | inode->i_blocks = 0; | |
226 | inode->i_rdev = 0; | |
227 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
228 | inode->i_mapping->a_ops = &v9fs_addr_operations; | |
229 | ||
230 | switch (mode & S_IFMT) { | |
231 | case S_IFIFO: | |
232 | case S_IFBLK: | |
233 | case S_IFCHR: | |
234 | case S_IFSOCK: | |
235 | if (!v9fs_extended(v9ses)) { | |
bd238fb4 | 236 | P9_DPRINTK(P9_DEBUG_ERROR, |
2bb54115 AK |
237 | "special files without extended mode\n"); |
238 | err = -EINVAL; | |
239 | goto error; | |
2bad8471 | 240 | } |
2bb54115 AK |
241 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
242 | break; | |
243 | case S_IFREG: | |
244 | inode->i_op = &v9fs_file_inode_operations; | |
245 | inode->i_fop = &v9fs_file_operations; | |
246 | break; | |
247 | case S_IFLNK: | |
248 | if (!v9fs_extended(v9ses)) { | |
249 | P9_DPRINTK(P9_DEBUG_ERROR, | |
250 | "extended modes used w/o 9P2000.u\n"); | |
251 | err = -EINVAL; | |
252 | goto error; | |
253 | } | |
254 | inode->i_op = &v9fs_symlink_inode_operations; | |
255 | break; | |
256 | case S_IFDIR: | |
257 | inc_nlink(inode); | |
258 | if (v9fs_extended(v9ses)) | |
259 | inode->i_op = &v9fs_dir_inode_operations_ext; | |
260 | else | |
261 | inode->i_op = &v9fs_dir_inode_operations; | |
262 | inode->i_fop = &v9fs_dir_operations; | |
263 | break; | |
264 | default: | |
265 | P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", | |
266 | mode, mode & S_IFMT); | |
267 | err = -EINVAL; | |
268 | goto error; | |
2bad8471 | 269 | } |
2bb54115 | 270 | |
2bad8471 | 271 | return inode; |
2bb54115 AK |
272 | |
273 | error: | |
274 | iput(inode); | |
275 | return ERR_PTR(err); | |
2bad8471 EVH |
276 | } |
277 | ||
bd238fb4 | 278 | /* |
6a3124a3 LI |
279 | static struct v9fs_fid* |
280 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) | |
281 | { | |
282 | int err; | |
736c4b85 | 283 | int nfid; |
6a3124a3 LI |
284 | struct v9fs_fid *ret; |
285 | struct v9fs_fcall *fcall; | |
286 | ||
287 | nfid = v9fs_get_idpool(&v9ses->fidpool); | |
288 | if (nfid < 0) { | |
0b8dd177 | 289 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 290 | return ERR_PTR(-ENOSPC); |
0b8dd177 LI |
291 | } |
292 | ||
6a3124a3 LI |
293 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
294 | &fcall); | |
295 | ||
296 | if (err < 0) { | |
41e5a6ac LI |
297 | if (fcall && fcall->id == RWALK) |
298 | goto clunk_fid; | |
299 | ||
6a3124a3 LI |
300 | PRINT_FCALL_ERROR("walk error", fcall); |
301 | v9fs_put_idpool(nfid, &v9ses->fidpool); | |
302 | goto error; | |
0b8dd177 | 303 | } |
6a3124a3 | 304 | |
3cf6429a LI |
305 | kfree(fcall); |
306 | fcall = NULL; | |
6a3124a3 LI |
307 | ret = v9fs_fid_create(v9ses, nfid); |
308 | if (!ret) { | |
309 | err = -ENOMEM; | |
310 | goto clunk_fid; | |
311 | } | |
0b8dd177 | 312 | |
6a3124a3 LI |
313 | err = v9fs_fid_insert(ret, dentry); |
314 | if (err < 0) { | |
315 | v9fs_fid_destroy(ret); | |
316 | goto clunk_fid; | |
0b8dd177 | 317 | } |
2bad8471 | 318 | |
6a3124a3 | 319 | return ret; |
2bad8471 | 320 | |
6a3124a3 LI |
321 | clunk_fid: |
322 | v9fs_t_clunk(v9ses, nfid); | |
2bad8471 | 323 | |
6a3124a3 LI |
324 | error: |
325 | kfree(fcall); | |
326 | return ERR_PTR(err); | |
327 | } | |
bd238fb4 | 328 | */ |
2bad8471 | 329 | |
ee443996 EVH |
330 | /** |
331 | * v9fs_inode_from_fid - populate an inode by issuing a attribute request | |
332 | * @v9ses: session information | |
333 | * @fid: fid to issue attribute request for | |
334 | * @sb: superblock on which to create inode | |
335 | * | |
336 | */ | |
337 | ||
5174fdab | 338 | static struct inode * |
bd238fb4 | 339 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
6a3124a3 LI |
340 | struct super_block *sb) |
341 | { | |
342 | int err, umode; | |
343 | struct inode *ret; | |
51a87c55 | 344 | struct p9_wstat *st; |
531b1094 | 345 | |
6a3124a3 | 346 | ret = NULL; |
bd238fb4 LI |
347 | st = p9_client_stat(fid); |
348 | if (IS_ERR(st)) { | |
349 | err = PTR_ERR(st); | |
350 | st = NULL; | |
6a3124a3 | 351 | goto error; |
2bad8471 EVH |
352 | } |
353 | ||
bd238fb4 | 354 | umode = p9mode2unixmode(v9ses, st->mode); |
6a3124a3 LI |
355 | ret = v9fs_get_inode(sb, umode); |
356 | if (IS_ERR(ret)) { | |
357 | err = PTR_ERR(ret); | |
358 | ret = NULL; | |
359 | goto error; | |
360 | } | |
2bad8471 | 361 | |
bd238fb4 LI |
362 | v9fs_stat2inode(st, ret, sb); |
363 | ret->i_ino = v9fs_qid2ino(&st->qid); | |
364 | kfree(st); | |
6a3124a3 | 365 | return ret; |
2bad8471 | 366 | |
6a3124a3 | 367 | error: |
bd238fb4 | 368 | kfree(st); |
6a3124a3 LI |
369 | if (ret) |
370 | iput(ret); | |
2bad8471 | 371 | |
6a3124a3 | 372 | return ERR_PTR(err); |
2bad8471 EVH |
373 | } |
374 | ||
375 | /** | |
376 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 EVH |
377 | * @dir: directory inode that is being deleted |
378 | * @file: dentry that is being deleted | |
379 | * @rmdir: removing a directory | |
2bad8471 EVH |
380 | * |
381 | */ | |
382 | ||
383 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) | |
384 | { | |
bd238fb4 LI |
385 | struct inode *file_inode; |
386 | struct v9fs_session_info *v9ses; | |
387 | struct p9_fid *v9fid; | |
2bad8471 | 388 | |
bd238fb4 | 389 | P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, |
2bad8471 EVH |
390 | rmdir); |
391 | ||
392 | file_inode = file->d_inode; | |
2bad8471 | 393 | v9ses = v9fs_inode2v9ses(file_inode); |
c959df9f | 394 | v9fid = v9fs_fid_clone(file); |
ba17674f | 395 | if (IS_ERR(v9fid)) |
da977b2c | 396 | return PTR_ERR(v9fid); |
2bad8471 | 397 | |
bd238fb4 | 398 | return p9_client_remove(v9fid); |
2bad8471 EVH |
399 | } |
400 | ||
6a3124a3 LI |
401 | static int |
402 | v9fs_open_created(struct inode *inode, struct file *file) | |
403 | { | |
404 | return 0; | |
405 | } | |
406 | ||
bd238fb4 | 407 | |
2bad8471 | 408 | /** |
bd238fb4 | 409 | * v9fs_create - Create a file |
ee443996 EVH |
410 | * @v9ses: session information |
411 | * @dir: directory that dentry is being created in | |
bd238fb4 LI |
412 | * @dentry: dentry that is being created |
413 | * @perm: create permissions | |
414 | * @mode: open mode | |
ee443996 | 415 | * @extension: 9p2000.u extension string to support devices, etc. |
2bad8471 EVH |
416 | * |
417 | */ | |
bd238fb4 LI |
418 | static struct p9_fid * |
419 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
420 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 421 | { |
6a3124a3 | 422 | int err; |
bd238fb4 LI |
423 | char *name; |
424 | struct p9_fid *dfid, *ofid, *fid; | |
6a3124a3 | 425 | struct inode *inode; |
6a3124a3 | 426 | |
51a87c55 EVH |
427 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
428 | ||
bd238fb4 LI |
429 | err = 0; |
430 | ofid = NULL; | |
431 | fid = NULL; | |
432 | name = (char *) dentry->d_name.name; | |
da977b2c | 433 | dfid = v9fs_fid_clone(dentry->d_parent); |
ba17674f | 434 | if (IS_ERR(dfid)) { |
da977b2c | 435 | err = PTR_ERR(dfid); |
51a87c55 | 436 | P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err); |
bd238fb4 | 437 | dfid = NULL; |
da977b2c EVH |
438 | goto error; |
439 | } | |
6a3124a3 | 440 | |
bd238fb4 LI |
441 | /* clone a fid to use for creation */ |
442 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
443 | if (IS_ERR(ofid)) { | |
444 | err = PTR_ERR(ofid); | |
51a87c55 | 445 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
bd238fb4 LI |
446 | ofid = NULL; |
447 | goto error; | |
448 | } | |
6a3124a3 | 449 | |
bd238fb4 | 450 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 EVH |
451 | if (err < 0) { |
452 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); | |
bd238fb4 | 453 | goto error; |
51a87c55 | 454 | } |
6a3124a3 | 455 | |
bd238fb4 LI |
456 | /* now walk from the parent so we can get unopened fid */ |
457 | fid = p9_client_walk(dfid, 1, &name, 0); | |
458 | if (IS_ERR(fid)) { | |
459 | err = PTR_ERR(fid); | |
51a87c55 | 460 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
bd238fb4 | 461 | fid = NULL; |
6a3124a3 | 462 | goto error; |
bd238fb4 LI |
463 | } else |
464 | dfid = NULL; | |
6a3124a3 | 465 | |
bd238fb4 LI |
466 | /* instantiate inode and assign the unopened fid to the dentry */ |
467 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
6a3124a3 LI |
468 | if (IS_ERR(inode)) { |
469 | err = PTR_ERR(inode); | |
51a87c55 | 470 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
6a3124a3 LI |
471 | goto error; |
472 | } | |
473 | ||
ba17674f | 474 | if (v9ses->cache) |
e03abc0c EVH |
475 | dentry->d_op = &v9fs_cached_dentry_operations; |
476 | else | |
477 | dentry->d_op = &v9fs_dentry_operations; | |
bd238fb4 | 478 | |
6a3124a3 | 479 | d_instantiate(dentry, inode); |
50fb6d2b AK |
480 | err = v9fs_fid_add(dentry, fid); |
481 | if (err < 0) | |
482 | goto error; | |
483 | ||
bd238fb4 | 484 | return ofid; |
6a3124a3 | 485 | |
bd238fb4 LI |
486 | error: |
487 | if (dfid) | |
488 | p9_client_clunk(dfid); | |
489 | ||
490 | if (ofid) | |
491 | p9_client_clunk(ofid); | |
492 | ||
493 | if (fid) | |
494 | p9_client_clunk(fid); | |
495 | ||
496 | return ERR_PTR(err); | |
497 | } | |
498 | ||
499 | /** | |
500 | * v9fs_vfs_create - VFS hook to create files | |
ee443996 | 501 | * @dir: directory inode that is being created |
bd238fb4 LI |
502 | * @dentry: dentry that is being deleted |
503 | * @mode: create permissions | |
504 | * @nd: path information | |
505 | * | |
506 | */ | |
6a3124a3 | 507 | |
bd238fb4 LI |
508 | static int |
509 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, | |
510 | struct nameidata *nd) | |
511 | { | |
512 | int err; | |
513 | u32 perm; | |
514 | int flags; | |
515 | struct v9fs_session_info *v9ses; | |
516 | struct p9_fid *fid; | |
517 | struct file *filp; | |
518 | ||
519 | err = 0; | |
520 | fid = NULL; | |
521 | v9ses = v9fs_inode2v9ses(dir); | |
522 | perm = unixmode2p9mode(v9ses, mode); | |
523 | if (nd && nd->flags & LOOKUP_OPEN) | |
524 | flags = nd->intent.open.flags - 1; | |
525 | else | |
526 | flags = O_RDWR; | |
527 | ||
528 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
2e4bef41 | 529 | v9fs_uflags2omode(flags, v9fs_extended(v9ses))); |
bd238fb4 LI |
530 | if (IS_ERR(fid)) { |
531 | err = PTR_ERR(fid); | |
532 | fid = NULL; | |
533 | goto error; | |
534 | } | |
535 | ||
536 | /* if we are opening a file, assign the open fid to the file */ | |
537 | if (nd && nd->flags & LOOKUP_OPEN) { | |
6a3124a3 LI |
538 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
539 | if (IS_ERR(filp)) { | |
bd238fb4 LI |
540 | err = PTR_ERR(filp); |
541 | goto error; | |
6a3124a3 LI |
542 | } |
543 | ||
bd238fb4 LI |
544 | filp->private_data = fid; |
545 | } else | |
546 | p9_client_clunk(fid); | |
6a3124a3 LI |
547 | |
548 | return 0; | |
549 | ||
550 | error: | |
bd238fb4 LI |
551 | if (fid) |
552 | p9_client_clunk(fid); | |
6a3124a3 | 553 | |
6a3124a3 | 554 | return err; |
2bad8471 EVH |
555 | } |
556 | ||
557 | /** | |
558 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
ee443996 | 559 | * @dir: inode that is being unlinked |
2bad8471 EVH |
560 | * @dentry: dentry that is being unlinked |
561 | * @mode: mode for new directory | |
562 | * | |
563 | */ | |
564 | ||
6a3124a3 | 565 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
2bad8471 | 566 | { |
6a3124a3 | 567 | int err; |
bd238fb4 | 568 | u32 perm; |
6a3124a3 | 569 | struct v9fs_session_info *v9ses; |
bd238fb4 | 570 | struct p9_fid *fid; |
6a3124a3 | 571 | |
bd238fb4 LI |
572 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
573 | err = 0; | |
6a3124a3 | 574 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 575 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
576 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
577 | if (IS_ERR(fid)) { | |
578 | err = PTR_ERR(fid); | |
579 | fid = NULL; | |
6a3124a3 LI |
580 | } |
581 | ||
bd238fb4 LI |
582 | if (fid) |
583 | p9_client_clunk(fid); | |
6a3124a3 | 584 | |
6a3124a3 | 585 | return err; |
2bad8471 EVH |
586 | } |
587 | ||
588 | /** | |
589 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
590 | * @dir: inode that is being walked from | |
591 | * @dentry: dentry that is being walked to? | |
592 | * @nameidata: path data | |
593 | * | |
594 | */ | |
595 | ||
596 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, | |
597 | struct nameidata *nameidata) | |
598 | { | |
599 | struct super_block *sb; | |
600 | struct v9fs_session_info *v9ses; | |
bd238fb4 | 601 | struct p9_fid *dfid, *fid; |
2bad8471 | 602 | struct inode *inode; |
bd238fb4 | 603 | char *name; |
2bad8471 EVH |
604 | int result = 0; |
605 | ||
bd238fb4 | 606 | P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", |
731805b4 | 607 | dir, dentry->d_name.name, dentry, nameidata); |
2bad8471 EVH |
608 | |
609 | sb = dir->i_sb; | |
610 | v9ses = v9fs_inode2v9ses(dir); | |
bd238fb4 LI |
611 | dfid = v9fs_fid_lookup(dentry->d_parent); |
612 | if (IS_ERR(dfid)) | |
e231c2ee | 613 | return ERR_CAST(dfid); |
bd238fb4 LI |
614 | |
615 | name = (char *) dentry->d_name.name; | |
616 | fid = p9_client_walk(dfid, 1, &name, 1); | |
617 | if (IS_ERR(fid)) { | |
618 | result = PTR_ERR(fid); | |
2bad8471 EVH |
619 | if (result == -ENOENT) { |
620 | d_add(dentry, NULL); | |
2bad8471 EVH |
621 | return NULL; |
622 | } | |
2bad8471 | 623 | |
bd238fb4 | 624 | return ERR_PTR(result); |
2bad8471 EVH |
625 | } |
626 | ||
bd238fb4 LI |
627 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
628 | if (IS_ERR(inode)) { | |
629 | result = PTR_ERR(inode); | |
630 | inode = NULL; | |
631 | goto error; | |
2bad8471 EVH |
632 | } |
633 | ||
bd238fb4 | 634 | result = v9fs_fid_add(dentry, fid); |
6a3124a3 | 635 | if (result < 0) |
bd238fb4 | 636 | goto error; |
6a3124a3 | 637 | |
ba17674f | 638 | if ((fid->qid.version) && (v9ses->cache)) |
e03abc0c EVH |
639 | dentry->d_op = &v9fs_cached_dentry_operations; |
640 | else | |
641 | dentry->d_op = &v9fs_dentry_operations; | |
2bad8471 EVH |
642 | |
643 | d_add(dentry, inode); | |
2bad8471 EVH |
644 | return NULL; |
645 | ||
bd238fb4 | 646 | error: |
62aa528e | 647 | p9_client_clunk(fid); |
da977b2c | 648 | |
2bad8471 EVH |
649 | return ERR_PTR(result); |
650 | } | |
651 | ||
652 | /** | |
653 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
654 | * @i: inode that is being unlinked | |
73c592b9 | 655 | * @d: dentry that is being unlinked |
2bad8471 EVH |
656 | * |
657 | */ | |
658 | ||
659 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) | |
660 | { | |
661 | return v9fs_remove(i, d, 0); | |
662 | } | |
663 | ||
664 | /** | |
665 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
666 | * @i: inode that is being unlinked | |
73c592b9 | 667 | * @d: dentry that is being unlinked |
2bad8471 EVH |
668 | * |
669 | */ | |
670 | ||
671 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) | |
672 | { | |
673 | return v9fs_remove(i, d, 1); | |
674 | } | |
675 | ||
676 | /** | |
677 | * v9fs_vfs_rename - VFS hook to rename an inode | |
678 | * @old_dir: old dir inode | |
679 | * @old_dentry: old dentry | |
680 | * @new_dir: new dir inode | |
681 | * @new_dentry: new dentry | |
682 | * | |
683 | */ | |
684 | ||
685 | static int | |
686 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
687 | struct inode *new_dir, struct dentry *new_dentry) | |
688 | { | |
bd238fb4 LI |
689 | struct inode *old_inode; |
690 | struct v9fs_session_info *v9ses; | |
691 | struct p9_fid *oldfid; | |
692 | struct p9_fid *olddirfid; | |
693 | struct p9_fid *newdirfid; | |
694 | struct p9_wstat wstat; | |
695 | int retval; | |
2bad8471 | 696 | |
bd238fb4 LI |
697 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
698 | retval = 0; | |
699 | old_inode = old_dentry->d_inode; | |
700 | v9ses = v9fs_inode2v9ses(old_inode); | |
701 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 702 | if (IS_ERR(oldfid)) |
da977b2c EVH |
703 | return PTR_ERR(oldfid); |
704 | ||
705 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); | |
ba17674f | 706 | if (IS_ERR(olddirfid)) { |
da977b2c | 707 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 708 | goto done; |
da977b2c EVH |
709 | } |
710 | ||
711 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); | |
ba17674f | 712 | if (IS_ERR(newdirfid)) { |
da977b2c | 713 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 714 | goto clunk_olddir; |
2bad8471 EVH |
715 | } |
716 | ||
717 | /* 9P can only handle file rename in the same directory */ | |
718 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { | |
bd238fb4 LI |
719 | P9_DPRINTK(P9_DEBUG_ERROR, |
720 | "old dir and new dir are different\n"); | |
621997cd | 721 | retval = -EXDEV; |
bd238fb4 | 722 | goto clunk_newdir; |
2bad8471 EVH |
723 | } |
724 | ||
531b1094 | 725 | v9fs_blank_wstat(&wstat); |
ba17674f | 726 | wstat.muid = v9ses->uname; |
531b1094 | 727 | wstat.name = (char *) new_dentry->d_name.name; |
bd238fb4 | 728 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 729 | |
bd238fb4 | 730 | clunk_newdir: |
22150c4f | 731 | p9_client_clunk(newdirfid); |
2bad8471 | 732 | |
bd238fb4 | 733 | clunk_olddir: |
22150c4f | 734 | p9_client_clunk(olddirfid); |
da977b2c | 735 | |
bd238fb4 | 736 | done: |
2bad8471 EVH |
737 | return retval; |
738 | } | |
739 | ||
740 | /** | |
943ffb58 | 741 | * v9fs_vfs_getattr - retrieve file metadata |
ee443996 EVH |
742 | * @mnt: mount information |
743 | * @dentry: file to get attributes on | |
744 | * @stat: metadata structure to populate | |
2bad8471 EVH |
745 | * |
746 | */ | |
747 | ||
748 | static int | |
749 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
750 | struct kstat *stat) | |
751 | { | |
bd238fb4 LI |
752 | int err; |
753 | struct v9fs_session_info *v9ses; | |
754 | struct p9_fid *fid; | |
51a87c55 | 755 | struct p9_wstat *st; |
bd238fb4 LI |
756 | |
757 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
758 | err = -EPERM; | |
759 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
9523a841 EVH |
760 | if (v9ses->cache == CACHE_LOOSE) |
761 | return simple_getattr(mnt, dentry, stat); | |
762 | ||
bd238fb4 LI |
763 | fid = v9fs_fid_lookup(dentry); |
764 | if (IS_ERR(fid)) | |
da977b2c | 765 | return PTR_ERR(fid); |
2bad8471 | 766 | |
bd238fb4 LI |
767 | st = p9_client_stat(fid); |
768 | if (IS_ERR(st)) | |
769 | return PTR_ERR(st); | |
2bad8471 | 770 | |
bd238fb4 | 771 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
2bad8471 | 772 | generic_fillattr(dentry->d_inode, stat); |
2bad8471 | 773 | |
bd238fb4 LI |
774 | kfree(st); |
775 | return 0; | |
2bad8471 EVH |
776 | } |
777 | ||
778 | /** | |
779 | * v9fs_vfs_setattr - set file metadata | |
780 | * @dentry: file whose metadata to set | |
781 | * @iattr: metadata assignment structure | |
782 | * | |
783 | */ | |
784 | ||
785 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
786 | { | |
bd238fb4 LI |
787 | int retval; |
788 | struct v9fs_session_info *v9ses; | |
789 | struct p9_fid *fid; | |
790 | struct p9_wstat wstat; | |
2bad8471 | 791 | |
bd238fb4 LI |
792 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
793 | retval = -EPERM; | |
794 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
795 | fid = v9fs_fid_lookup(dentry); | |
da977b2c EVH |
796 | if(IS_ERR(fid)) |
797 | return PTR_ERR(fid); | |
2bad8471 | 798 | |
531b1094 | 799 | v9fs_blank_wstat(&wstat); |
2bad8471 | 800 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 801 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
802 | |
803 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 804 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
805 | |
806 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 807 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
808 | |
809 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 810 | wstat.length = iattr->ia_size; |
2bad8471 | 811 | |
2405669b | 812 | if (v9fs_extended(v9ses)) { |
531b1094 LI |
813 | if (iattr->ia_valid & ATTR_UID) |
814 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 815 | |
531b1094 LI |
816 | if (iattr->ia_valid & ATTR_GID) |
817 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 EVH |
818 | } |
819 | ||
bd238fb4 LI |
820 | retval = p9_client_wstat(fid, &wstat); |
821 | if (retval >= 0) | |
822 | retval = inode_setattr(dentry->d_inode, iattr); | |
2bad8471 | 823 | |
bd238fb4 | 824 | return retval; |
2bad8471 EVH |
825 | } |
826 | ||
827 | /** | |
531b1094 LI |
828 | * v9fs_stat2inode - populate an inode structure with mistat info |
829 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
830 | * @inode: inode to populate |
831 | * @sb: superblock of filesystem | |
832 | * | |
833 | */ | |
834 | ||
835 | void | |
51a87c55 | 836 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
531b1094 | 837 | struct super_block *sb) |
2bad8471 | 838 | { |
531b1094 | 839 | char ext[32]; |
2bad8471 EVH |
840 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
841 | ||
842 | inode->i_nlink = 1; | |
843 | ||
531b1094 LI |
844 | inode->i_atime.tv_sec = stat->atime; |
845 | inode->i_mtime.tv_sec = stat->mtime; | |
846 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 847 | |
bd32b82d LI |
848 | inode->i_uid = v9ses->dfltuid; |
849 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 850 | |
2405669b | 851 | if (v9fs_extended(v9ses)) { |
531b1094 LI |
852 | inode->i_uid = stat->n_uid; |
853 | inode->i_gid = stat->n_gid; | |
2bad8471 EVH |
854 | } |
855 | ||
531b1094 | 856 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
2bad8471 EVH |
857 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
858 | char type = 0; | |
859 | int major = -1; | |
860 | int minor = -1; | |
531b1094 | 861 | |
51a87c55 | 862 | strncpy(ext, stat->extension, sizeof(ext)); |
531b1094 | 863 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
2bad8471 EVH |
864 | switch (type) { |
865 | case 'c': | |
866 | inode->i_mode &= ~S_IFBLK; | |
867 | inode->i_mode |= S_IFCHR; | |
868 | break; | |
869 | case 'b': | |
870 | break; | |
871 | default: | |
bd238fb4 | 872 | P9_DPRINTK(P9_DEBUG_ERROR, |
51a87c55 EVH |
873 | "Unknown special type %c %s\n", type, |
874 | stat->extension); | |
2bad8471 EVH |
875 | }; |
876 | inode->i_rdev = MKDEV(major, minor); | |
57c7b4e6 | 877 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
2bad8471 EVH |
878 | } else |
879 | inode->i_rdev = 0; | |
880 | ||
531b1094 | 881 | inode->i_size = stat->length; |
2bad8471 | 882 | |
bd238fb4 LI |
883 | /* not real number of blocks, but 512 byte ones ... */ |
884 | inode->i_blocks = (inode->i_size + 512 - 1) >> 9; | |
2bad8471 EVH |
885 | } |
886 | ||
887 | /** | |
888 | * v9fs_qid2ino - convert qid into inode number | |
889 | * @qid: qid to hash | |
890 | * | |
891 | * BUG: potential for inode number collisions? | |
892 | */ | |
893 | ||
bd238fb4 | 894 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
895 | { |
896 | u64 path = qid->path + 2; | |
897 | ino_t i = 0; | |
898 | ||
899 | if (sizeof(ino_t) == sizeof(path)) | |
900 | memcpy(&i, &path, sizeof(ino_t)); | |
901 | else | |
902 | i = (ino_t) (path ^ (path >> 32)); | |
903 | ||
904 | return i; | |
905 | } | |
906 | ||
2bad8471 EVH |
907 | /** |
908 | * v9fs_readlink - read a symlink's location (internal version) | |
909 | * @dentry: dentry for symlink | |
73c592b9 | 910 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
911 | * @buflen: length of buffer |
912 | * | |
913 | */ | |
914 | ||
915 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
916 | { | |
bd238fb4 | 917 | int retval; |
2bad8471 | 918 | |
bd238fb4 LI |
919 | struct v9fs_session_info *v9ses; |
920 | struct p9_fid *fid; | |
51a87c55 | 921 | struct p9_wstat *st; |
2bad8471 | 922 | |
bd238fb4 LI |
923 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
924 | retval = -EPERM; | |
925 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
926 | fid = v9fs_fid_lookup(dentry); | |
ba17674f | 927 | if (IS_ERR(fid)) |
da977b2c | 928 | return PTR_ERR(fid); |
2bad8471 | 929 | |
2405669b | 930 | if (!v9fs_extended(v9ses)) |
bd238fb4 | 931 | return -EBADF; |
2bad8471 | 932 | |
bd238fb4 LI |
933 | st = p9_client_stat(fid); |
934 | if (IS_ERR(st)) | |
935 | return PTR_ERR(st); | |
2bad8471 | 936 | |
bd238fb4 | 937 | if (!(st->mode & P9_DMSYMLINK)) { |
2bad8471 | 938 | retval = -EINVAL; |
bd238fb4 | 939 | goto done; |
2bad8471 EVH |
940 | } |
941 | ||
942 | /* copy extension buffer into buffer */ | |
51a87c55 | 943 | strncpy(buffer, st->extension, buflen); |
2bad8471 | 944 | |
bd238fb4 | 945 | P9_DPRINTK(P9_DEBUG_VFS, |
51a87c55 | 946 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
2bad8471 | 947 | |
bd238fb4 | 948 | retval = buflen; |
da977b2c | 949 | |
bd238fb4 LI |
950 | done: |
951 | kfree(st); | |
2bad8471 EVH |
952 | return retval; |
953 | } | |
954 | ||
955 | /** | |
956 | * v9fs_vfs_readlink - read a symlink's location | |
957 | * @dentry: dentry for symlink | |
ee443996 | 958 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
959 | * @buflen: length of buffer |
960 | * | |
961 | */ | |
962 | ||
963 | static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, | |
964 | int buflen) | |
965 | { | |
966 | int retval; | |
967 | int ret; | |
968 | char *link = __getname(); | |
969 | ||
0710d36a FM |
970 | if (unlikely(!link)) |
971 | return -ENOMEM; | |
972 | ||
a1f9d8d2 LI |
973 | if (buflen > PATH_MAX) |
974 | buflen = PATH_MAX; | |
2bad8471 | 975 | |
7dd0cdc5 WF |
976 | P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, |
977 | dentry); | |
2bad8471 EVH |
978 | |
979 | retval = v9fs_readlink(dentry, link, buflen); | |
980 | ||
981 | if (retval > 0) { | |
982 | if ((ret = copy_to_user(buffer, link, retval)) != 0) { | |
bd238fb4 LI |
983 | P9_DPRINTK(P9_DEBUG_ERROR, |
984 | "problem copying to user: %d\n", ret); | |
2bad8471 EVH |
985 | retval = ret; |
986 | } | |
987 | } | |
988 | ||
ce44eeb6 | 989 | __putname(link); |
2bad8471 EVH |
990 | return retval; |
991 | } | |
992 | ||
993 | /** | |
994 | * v9fs_vfs_follow_link - follow a symlink path | |
995 | * @dentry: dentry for symlink | |
996 | * @nd: nameidata | |
997 | * | |
998 | */ | |
999 | ||
1000 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
1001 | { | |
1002 | int len = 0; | |
1003 | char *link = __getname(); | |
1004 | ||
bd238fb4 | 1005 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
2bad8471 EVH |
1006 | |
1007 | if (!link) | |
1008 | link = ERR_PTR(-ENOMEM); | |
1009 | else { | |
16cce6d2 | 1010 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
1011 | |
1012 | if (len < 0) { | |
ce44eeb6 | 1013 | __putname(link); |
2bad8471 EVH |
1014 | link = ERR_PTR(len); |
1015 | } else | |
1016 | link[len] = 0; | |
1017 | } | |
1018 | nd_set_link(nd, link); | |
1019 | ||
1020 | return NULL; | |
1021 | } | |
1022 | ||
1023 | /** | |
1024 | * v9fs_vfs_put_link - release a symlink path | |
1025 | * @dentry: dentry for symlink | |
1026 | * @nd: nameidata | |
ee443996 | 1027 | * @p: unused |
2bad8471 EVH |
1028 | * |
1029 | */ | |
1030 | ||
ee443996 EVH |
1031 | static void |
1032 | v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) | |
2bad8471 EVH |
1033 | { |
1034 | char *s = nd_get_link(nd); | |
1035 | ||
6ff23207 DG |
1036 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
1037 | IS_ERR(s) ? "<error>" : s); | |
2bad8471 | 1038 | if (!IS_ERR(s)) |
ce44eeb6 | 1039 | __putname(s); |
2bad8471 EVH |
1040 | } |
1041 | ||
ee443996 EVH |
1042 | /** |
1043 | * v9fs_vfs_mkspecial - create a special file | |
1044 | * @dir: inode to create special file in | |
1045 | * @dentry: dentry to create | |
1046 | * @mode: mode to create special file | |
1047 | * @extension: 9p2000.u format extension string representing special file | |
1048 | * | |
1049 | */ | |
1050 | ||
531b1094 LI |
1051 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
1052 | int mode, const char *extension) | |
2bad8471 | 1053 | { |
bd238fb4 | 1054 | u32 perm; |
531b1094 | 1055 | struct v9fs_session_info *v9ses; |
bd238fb4 | 1056 | struct p9_fid *fid; |
2bad8471 | 1057 | |
6a3124a3 | 1058 | v9ses = v9fs_inode2v9ses(dir); |
2405669b | 1059 | if (!v9fs_extended(v9ses)) { |
bd238fb4 | 1060 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1061 | return -EPERM; |
2bad8471 EVH |
1062 | } |
1063 | ||
da977b2c | 1064 | perm = unixmode2p9mode(v9ses, mode); |
bd238fb4 LI |
1065 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1066 | P9_OREAD); | |
1067 | if (IS_ERR(fid)) | |
1068 | return PTR_ERR(fid); | |
da977b2c | 1069 | |
bd238fb4 | 1070 | p9_client_clunk(fid); |
6a3124a3 | 1071 | return 0; |
531b1094 LI |
1072 | } |
1073 | ||
1074 | /** | |
1075 | * v9fs_vfs_symlink - helper function to create symlinks | |
1076 | * @dir: directory inode containing symlink | |
1077 | * @dentry: dentry for symlink | |
1078 | * @symname: symlink data | |
1079 | * | |
ee443996 | 1080 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1081 | * |
1082 | */ | |
1083 | ||
1084 | static int | |
1085 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1086 | { | |
bd238fb4 LI |
1087 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
1088 | dentry->d_name.name, symname); | |
531b1094 LI |
1089 | |
1090 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * v9fs_vfs_link - create a hardlink | |
1095 | * @old_dentry: dentry for file to link to | |
1096 | * @dir: inode destination for new link | |
1097 | * @dentry: dentry for link | |
1098 | * | |
1099 | */ | |
1100 | ||
531b1094 LI |
1101 | static int |
1102 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1103 | struct dentry *dentry) | |
1104 | { | |
1105 | int retval; | |
bd238fb4 | 1106 | struct p9_fid *oldfid; |
531b1094 LI |
1107 | char *name; |
1108 | ||
bd238fb4 LI |
1109 | P9_DPRINTK(P9_DEBUG_VFS, |
1110 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
531b1094 LI |
1111 | old_dentry->d_name.name); |
1112 | ||
da977b2c | 1113 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1114 | if (IS_ERR(oldfid)) |
da977b2c | 1115 | return PTR_ERR(oldfid); |
531b1094 LI |
1116 | |
1117 | name = __getname(); | |
da977b2c EVH |
1118 | if (unlikely(!name)) { |
1119 | retval = -ENOMEM; | |
1120 | goto clunk_fid; | |
1121 | } | |
0710d36a | 1122 | |
16cce6d2 | 1123 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1124 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
531b1094 | 1125 | __putname(name); |
2bad8471 | 1126 | |
da977b2c | 1127 | clunk_fid: |
bd238fb4 | 1128 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1129 | return retval; |
1130 | } | |
1131 | ||
1132 | /** | |
1133 | * v9fs_vfs_mknod - create a special file | |
1134 | * @dir: inode destination for new link | |
1135 | * @dentry: dentry for file | |
1136 | * @mode: mode for creation | |
ee443996 | 1137 | * @rdev: device associated with special file |
2bad8471 EVH |
1138 | * |
1139 | */ | |
1140 | ||
1141 | static int | |
1142 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |
1143 | { | |
531b1094 LI |
1144 | int retval; |
1145 | char *name; | |
2bad8471 | 1146 | |
bd238fb4 LI |
1147 | P9_DPRINTK(P9_DEBUG_VFS, |
1148 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
2bad8471 EVH |
1149 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
1150 | ||
531b1094 LI |
1151 | if (!new_valid_dev(rdev)) |
1152 | return -EINVAL; | |
2bad8471 | 1153 | |
531b1094 | 1154 | name = __getname(); |
c0291a05 ET |
1155 | if (!name) |
1156 | return -ENOMEM; | |
2bad8471 EVH |
1157 | /* build extension */ |
1158 | if (S_ISBLK(mode)) | |
531b1094 | 1159 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1160 | else if (S_ISCHR(mode)) |
531b1094 | 1161 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1162 | else if (S_ISFIFO(mode)) |
531b1094 | 1163 | *name = 0; |
2bad8471 | 1164 | else { |
531b1094 LI |
1165 | __putname(name); |
1166 | return -EINVAL; | |
2bad8471 EVH |
1167 | } |
1168 | ||
531b1094 LI |
1169 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1170 | __putname(name); | |
2bad8471 EVH |
1171 | |
1172 | return retval; | |
1173 | } | |
1174 | ||
754661f1 | 1175 | static const struct inode_operations v9fs_dir_inode_operations_ext = { |
2bad8471 EVH |
1176 | .create = v9fs_vfs_create, |
1177 | .lookup = v9fs_vfs_lookup, | |
1178 | .symlink = v9fs_vfs_symlink, | |
1179 | .link = v9fs_vfs_link, | |
1180 | .unlink = v9fs_vfs_unlink, | |
1181 | .mkdir = v9fs_vfs_mkdir, | |
1182 | .rmdir = v9fs_vfs_rmdir, | |
1183 | .mknod = v9fs_vfs_mknod, | |
1184 | .rename = v9fs_vfs_rename, | |
1185 | .readlink = v9fs_vfs_readlink, | |
1186 | .getattr = v9fs_vfs_getattr, | |
1187 | .setattr = v9fs_vfs_setattr, | |
1188 | }; | |
1189 | ||
754661f1 | 1190 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1191 | .create = v9fs_vfs_create, |
1192 | .lookup = v9fs_vfs_lookup, | |
1193 | .unlink = v9fs_vfs_unlink, | |
1194 | .mkdir = v9fs_vfs_mkdir, | |
1195 | .rmdir = v9fs_vfs_rmdir, | |
1196 | .mknod = v9fs_vfs_mknod, | |
1197 | .rename = v9fs_vfs_rename, | |
1198 | .getattr = v9fs_vfs_getattr, | |
1199 | .setattr = v9fs_vfs_setattr, | |
1200 | }; | |
1201 | ||
754661f1 | 1202 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1203 | .getattr = v9fs_vfs_getattr, |
1204 | .setattr = v9fs_vfs_setattr, | |
1205 | }; | |
1206 | ||
754661f1 | 1207 | static const struct inode_operations v9fs_symlink_inode_operations = { |
2bad8471 EVH |
1208 | .readlink = v9fs_vfs_readlink, |
1209 | .follow_link = v9fs_vfs_follow_link, | |
1210 | .put_link = v9fs_vfs_put_link, | |
1211 | .getattr = v9fs_vfs_getattr, | |
1212 | .setattr = v9fs_vfs_setattr, | |
1213 | }; |