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Commit | Line | Data |
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2bad8471 EVH |
1 | /* |
2 | * linux/fs/9p/vfs_inode.c | |
3 | * | |
73c592b9 | 4 | * This file contains vfs inode ops for the 9P2000 protocol. |
2bad8471 EVH |
5 | * |
6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
42e8c509 EVH |
10 | * it under the terms of the GNU General Public License version 2 |
11 | * as published by the Free Software Foundation. | |
2bad8471 EVH |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/file.h> | |
30 | #include <linux/pagemap.h> | |
31 | #include <linux/stat.h> | |
32 | #include <linux/string.h> | |
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 | { | |
6a3124a3 | 210 | struct inode *inode; |
b501611a | 211 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
2bad8471 | 212 | |
bd238fb4 | 213 | P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
2bad8471 EVH |
214 | |
215 | inode = new_inode(sb); | |
216 | if (inode) { | |
217 | inode->i_mode = mode; | |
f8b9d53a DH |
218 | inode->i_uid = current_fsuid(); |
219 | inode->i_gid = current_fsgid(); | |
2bad8471 EVH |
220 | inode->i_blocks = 0; |
221 | inode->i_rdev = 0; | |
222 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
147b31cf | 223 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
2bad8471 EVH |
224 | |
225 | switch (mode & S_IFMT) { | |
226 | case S_IFIFO: | |
227 | case S_IFBLK: | |
228 | case S_IFCHR: | |
229 | case S_IFSOCK: | |
2405669b | 230 | if (!v9fs_extended(v9ses)) { |
bd238fb4 LI |
231 | P9_DPRINTK(P9_DEBUG_ERROR, |
232 | "special files without extended mode\n"); | |
b501611a EVH |
233 | return ERR_PTR(-EINVAL); |
234 | } | |
5d58bec5 EVH |
235 | init_special_inode(inode, inode->i_mode, |
236 | inode->i_rdev); | |
237 | break; | |
2bad8471 EVH |
238 | case S_IFREG: |
239 | inode->i_op = &v9fs_file_inode_operations; | |
240 | inode->i_fop = &v9fs_file_operations; | |
241 | break; | |
b501611a | 242 | case S_IFLNK: |
2405669b | 243 | if (!v9fs_extended(v9ses)) { |
bd238fb4 LI |
244 | P9_DPRINTK(P9_DEBUG_ERROR, |
245 | "extended modes used w/o 9P2000.u\n"); | |
b501611a EVH |
246 | return ERR_PTR(-EINVAL); |
247 | } | |
248 | inode->i_op = &v9fs_symlink_inode_operations; | |
249 | break; | |
2bad8471 | 250 | case S_IFDIR: |
d8c76e6f | 251 | inc_nlink(inode); |
2405669b | 252 | if (v9fs_extended(v9ses)) |
b501611a EVH |
253 | inode->i_op = &v9fs_dir_inode_operations_ext; |
254 | else | |
255 | inode->i_op = &v9fs_dir_inode_operations; | |
2bad8471 EVH |
256 | inode->i_fop = &v9fs_dir_operations; |
257 | break; | |
2bad8471 | 258 | default: |
bd238fb4 LI |
259 | P9_DPRINTK(P9_DEBUG_ERROR, |
260 | "BAD mode 0x%x S_IFMT 0x%x\n", | |
2bad8471 EVH |
261 | mode, mode & S_IFMT); |
262 | return ERR_PTR(-EINVAL); | |
263 | } | |
264 | } else { | |
bd238fb4 | 265 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); |
2bad8471 EVH |
266 | return ERR_PTR(-ENOMEM); |
267 | } | |
268 | return inode; | |
269 | } | |
270 | ||
bd238fb4 | 271 | /* |
6a3124a3 LI |
272 | static struct v9fs_fid* |
273 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) | |
274 | { | |
275 | int err; | |
736c4b85 | 276 | int nfid; |
6a3124a3 LI |
277 | struct v9fs_fid *ret; |
278 | struct v9fs_fcall *fcall; | |
279 | ||
280 | nfid = v9fs_get_idpool(&v9ses->fidpool); | |
281 | if (nfid < 0) { | |
0b8dd177 | 282 | eprintk(KERN_WARNING, "no free fids available\n"); |
731805b4 | 283 | return ERR_PTR(-ENOSPC); |
0b8dd177 LI |
284 | } |
285 | ||
6a3124a3 LI |
286 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
287 | &fcall); | |
288 | ||
289 | if (err < 0) { | |
41e5a6ac LI |
290 | if (fcall && fcall->id == RWALK) |
291 | goto clunk_fid; | |
292 | ||
6a3124a3 LI |
293 | PRINT_FCALL_ERROR("walk error", fcall); |
294 | v9fs_put_idpool(nfid, &v9ses->fidpool); | |
295 | goto error; | |
0b8dd177 | 296 | } |
6a3124a3 | 297 | |
3cf6429a LI |
298 | kfree(fcall); |
299 | fcall = NULL; | |
6a3124a3 LI |
300 | ret = v9fs_fid_create(v9ses, nfid); |
301 | if (!ret) { | |
302 | err = -ENOMEM; | |
303 | goto clunk_fid; | |
304 | } | |
0b8dd177 | 305 | |
6a3124a3 LI |
306 | err = v9fs_fid_insert(ret, dentry); |
307 | if (err < 0) { | |
308 | v9fs_fid_destroy(ret); | |
309 | goto clunk_fid; | |
0b8dd177 | 310 | } |
2bad8471 | 311 | |
6a3124a3 | 312 | return ret; |
2bad8471 | 313 | |
6a3124a3 LI |
314 | clunk_fid: |
315 | v9fs_t_clunk(v9ses, nfid); | |
2bad8471 | 316 | |
6a3124a3 LI |
317 | error: |
318 | kfree(fcall); | |
319 | return ERR_PTR(err); | |
320 | } | |
bd238fb4 | 321 | */ |
2bad8471 | 322 | |
ee443996 EVH |
323 | /** |
324 | * v9fs_inode_from_fid - populate an inode by issuing a attribute request | |
325 | * @v9ses: session information | |
326 | * @fid: fid to issue attribute request for | |
327 | * @sb: superblock on which to create inode | |
328 | * | |
329 | */ | |
330 | ||
5174fdab | 331 | static struct inode * |
bd238fb4 | 332 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
6a3124a3 LI |
333 | struct super_block *sb) |
334 | { | |
335 | int err, umode; | |
336 | struct inode *ret; | |
51a87c55 | 337 | struct p9_wstat *st; |
531b1094 | 338 | |
6a3124a3 | 339 | ret = NULL; |
bd238fb4 LI |
340 | st = p9_client_stat(fid); |
341 | if (IS_ERR(st)) { | |
342 | err = PTR_ERR(st); | |
343 | st = NULL; | |
6a3124a3 | 344 | goto error; |
2bad8471 EVH |
345 | } |
346 | ||
bd238fb4 | 347 | umode = p9mode2unixmode(v9ses, st->mode); |
6a3124a3 LI |
348 | ret = v9fs_get_inode(sb, umode); |
349 | if (IS_ERR(ret)) { | |
350 | err = PTR_ERR(ret); | |
351 | ret = NULL; | |
352 | goto error; | |
353 | } | |
2bad8471 | 354 | |
bd238fb4 LI |
355 | v9fs_stat2inode(st, ret, sb); |
356 | ret->i_ino = v9fs_qid2ino(&st->qid); | |
357 | kfree(st); | |
6a3124a3 | 358 | return ret; |
2bad8471 | 359 | |
6a3124a3 | 360 | error: |
bd238fb4 | 361 | kfree(st); |
6a3124a3 LI |
362 | if (ret) |
363 | iput(ret); | |
2bad8471 | 364 | |
6a3124a3 | 365 | return ERR_PTR(err); |
2bad8471 EVH |
366 | } |
367 | ||
368 | /** | |
369 | * v9fs_remove - helper function to remove files and directories | |
73c592b9 EVH |
370 | * @dir: directory inode that is being deleted |
371 | * @file: dentry that is being deleted | |
372 | * @rmdir: removing a directory | |
2bad8471 EVH |
373 | * |
374 | */ | |
375 | ||
376 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) | |
377 | { | |
bd238fb4 LI |
378 | struct inode *file_inode; |
379 | struct v9fs_session_info *v9ses; | |
380 | struct p9_fid *v9fid; | |
2bad8471 | 381 | |
bd238fb4 | 382 | P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, |
2bad8471 EVH |
383 | rmdir); |
384 | ||
385 | file_inode = file->d_inode; | |
2bad8471 | 386 | v9ses = v9fs_inode2v9ses(file_inode); |
c959df9f | 387 | v9fid = v9fs_fid_clone(file); |
ba17674f | 388 | if (IS_ERR(v9fid)) |
da977b2c | 389 | return PTR_ERR(v9fid); |
2bad8471 | 390 | |
bd238fb4 | 391 | return p9_client_remove(v9fid); |
2bad8471 EVH |
392 | } |
393 | ||
6a3124a3 LI |
394 | static int |
395 | v9fs_open_created(struct inode *inode, struct file *file) | |
396 | { | |
397 | return 0; | |
398 | } | |
399 | ||
bd238fb4 | 400 | |
2bad8471 | 401 | /** |
bd238fb4 | 402 | * v9fs_create - Create a file |
ee443996 EVH |
403 | * @v9ses: session information |
404 | * @dir: directory that dentry is being created in | |
bd238fb4 LI |
405 | * @dentry: dentry that is being created |
406 | * @perm: create permissions | |
407 | * @mode: open mode | |
ee443996 | 408 | * @extension: 9p2000.u extension string to support devices, etc. |
2bad8471 EVH |
409 | * |
410 | */ | |
bd238fb4 LI |
411 | static struct p9_fid * |
412 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, | |
413 | struct dentry *dentry, char *extension, u32 perm, u8 mode) | |
2bad8471 | 414 | { |
6a3124a3 | 415 | int err; |
bd238fb4 LI |
416 | char *name; |
417 | struct p9_fid *dfid, *ofid, *fid; | |
6a3124a3 | 418 | struct inode *inode; |
6a3124a3 | 419 | |
51a87c55 EVH |
420 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
421 | ||
bd238fb4 LI |
422 | err = 0; |
423 | ofid = NULL; | |
424 | fid = NULL; | |
425 | name = (char *) dentry->d_name.name; | |
da977b2c | 426 | dfid = v9fs_fid_clone(dentry->d_parent); |
ba17674f | 427 | if (IS_ERR(dfid)) { |
da977b2c | 428 | err = PTR_ERR(dfid); |
51a87c55 | 429 | P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err); |
bd238fb4 | 430 | dfid = NULL; |
da977b2c EVH |
431 | goto error; |
432 | } | |
6a3124a3 | 433 | |
bd238fb4 LI |
434 | /* clone a fid to use for creation */ |
435 | ofid = p9_client_walk(dfid, 0, NULL, 1); | |
436 | if (IS_ERR(ofid)) { | |
437 | err = PTR_ERR(ofid); | |
51a87c55 | 438 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
bd238fb4 LI |
439 | ofid = NULL; |
440 | goto error; | |
441 | } | |
6a3124a3 | 442 | |
bd238fb4 | 443 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
51a87c55 EVH |
444 | if (err < 0) { |
445 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); | |
bd238fb4 | 446 | goto error; |
51a87c55 | 447 | } |
6a3124a3 | 448 | |
bd238fb4 LI |
449 | /* now walk from the parent so we can get unopened fid */ |
450 | fid = p9_client_walk(dfid, 1, &name, 0); | |
451 | if (IS_ERR(fid)) { | |
452 | err = PTR_ERR(fid); | |
51a87c55 | 453 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
bd238fb4 | 454 | fid = NULL; |
6a3124a3 | 455 | goto error; |
bd238fb4 LI |
456 | } else |
457 | dfid = NULL; | |
6a3124a3 | 458 | |
bd238fb4 LI |
459 | /* instantiate inode and assign the unopened fid to the dentry */ |
460 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); | |
6a3124a3 LI |
461 | if (IS_ERR(inode)) { |
462 | err = PTR_ERR(inode); | |
51a87c55 | 463 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
6a3124a3 LI |
464 | goto error; |
465 | } | |
466 | ||
ba17674f | 467 | if (v9ses->cache) |
e03abc0c EVH |
468 | dentry->d_op = &v9fs_cached_dentry_operations; |
469 | else | |
470 | dentry->d_op = &v9fs_dentry_operations; | |
bd238fb4 | 471 | |
6a3124a3 | 472 | d_instantiate(dentry, inode); |
50fb6d2b AK |
473 | err = v9fs_fid_add(dentry, fid); |
474 | if (err < 0) | |
475 | goto error; | |
476 | ||
bd238fb4 | 477 | return ofid; |
6a3124a3 | 478 | |
bd238fb4 LI |
479 | error: |
480 | if (dfid) | |
481 | p9_client_clunk(dfid); | |
482 | ||
483 | if (ofid) | |
484 | p9_client_clunk(ofid); | |
485 | ||
486 | if (fid) | |
487 | p9_client_clunk(fid); | |
488 | ||
489 | return ERR_PTR(err); | |
490 | } | |
491 | ||
492 | /** | |
493 | * v9fs_vfs_create - VFS hook to create files | |
ee443996 | 494 | * @dir: directory inode that is being created |
bd238fb4 LI |
495 | * @dentry: dentry that is being deleted |
496 | * @mode: create permissions | |
497 | * @nd: path information | |
498 | * | |
499 | */ | |
6a3124a3 | 500 | |
bd238fb4 LI |
501 | static int |
502 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, | |
503 | struct nameidata *nd) | |
504 | { | |
505 | int err; | |
506 | u32 perm; | |
507 | int flags; | |
508 | struct v9fs_session_info *v9ses; | |
509 | struct p9_fid *fid; | |
510 | struct file *filp; | |
511 | ||
512 | err = 0; | |
513 | fid = NULL; | |
514 | v9ses = v9fs_inode2v9ses(dir); | |
515 | perm = unixmode2p9mode(v9ses, mode); | |
516 | if (nd && nd->flags & LOOKUP_OPEN) | |
517 | flags = nd->intent.open.flags - 1; | |
518 | else | |
519 | flags = O_RDWR; | |
520 | ||
521 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, | |
2e4bef41 | 522 | v9fs_uflags2omode(flags, v9fs_extended(v9ses))); |
bd238fb4 LI |
523 | if (IS_ERR(fid)) { |
524 | err = PTR_ERR(fid); | |
525 | fid = NULL; | |
526 | goto error; | |
527 | } | |
528 | ||
529 | /* if we are opening a file, assign the open fid to the file */ | |
530 | if (nd && nd->flags & LOOKUP_OPEN) { | |
6a3124a3 LI |
531 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
532 | if (IS_ERR(filp)) { | |
bd238fb4 LI |
533 | err = PTR_ERR(filp); |
534 | goto error; | |
6a3124a3 LI |
535 | } |
536 | ||
bd238fb4 LI |
537 | filp->private_data = fid; |
538 | } else | |
539 | p9_client_clunk(fid); | |
6a3124a3 LI |
540 | |
541 | return 0; | |
542 | ||
543 | error: | |
bd238fb4 LI |
544 | if (fid) |
545 | p9_client_clunk(fid); | |
6a3124a3 | 546 | |
6a3124a3 | 547 | return err; |
2bad8471 EVH |
548 | } |
549 | ||
550 | /** | |
551 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory | |
ee443996 | 552 | * @dir: inode that is being unlinked |
2bad8471 EVH |
553 | * @dentry: dentry that is being unlinked |
554 | * @mode: mode for new directory | |
555 | * | |
556 | */ | |
557 | ||
6a3124a3 | 558 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
2bad8471 | 559 | { |
6a3124a3 | 560 | int err; |
bd238fb4 | 561 | u32 perm; |
6a3124a3 | 562 | struct v9fs_session_info *v9ses; |
bd238fb4 | 563 | struct p9_fid *fid; |
6a3124a3 | 564 | |
bd238fb4 LI |
565 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
566 | err = 0; | |
6a3124a3 | 567 | v9ses = v9fs_inode2v9ses(dir); |
6a3124a3 | 568 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
bd238fb4 LI |
569 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
570 | if (IS_ERR(fid)) { | |
571 | err = PTR_ERR(fid); | |
572 | fid = NULL; | |
6a3124a3 LI |
573 | } |
574 | ||
bd238fb4 LI |
575 | if (fid) |
576 | p9_client_clunk(fid); | |
6a3124a3 | 577 | |
6a3124a3 | 578 | return err; |
2bad8471 EVH |
579 | } |
580 | ||
581 | /** | |
582 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode | |
583 | * @dir: inode that is being walked from | |
584 | * @dentry: dentry that is being walked to? | |
585 | * @nameidata: path data | |
586 | * | |
587 | */ | |
588 | ||
589 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, | |
590 | struct nameidata *nameidata) | |
591 | { | |
592 | struct super_block *sb; | |
593 | struct v9fs_session_info *v9ses; | |
bd238fb4 | 594 | struct p9_fid *dfid, *fid; |
2bad8471 | 595 | struct inode *inode; |
bd238fb4 | 596 | char *name; |
2bad8471 EVH |
597 | int result = 0; |
598 | ||
bd238fb4 | 599 | P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", |
731805b4 | 600 | dir, dentry->d_name.name, dentry, nameidata); |
2bad8471 EVH |
601 | |
602 | sb = dir->i_sb; | |
603 | v9ses = v9fs_inode2v9ses(dir); | |
bd238fb4 LI |
604 | dfid = v9fs_fid_lookup(dentry->d_parent); |
605 | if (IS_ERR(dfid)) | |
e231c2ee | 606 | return ERR_CAST(dfid); |
bd238fb4 LI |
607 | |
608 | name = (char *) dentry->d_name.name; | |
609 | fid = p9_client_walk(dfid, 1, &name, 1); | |
610 | if (IS_ERR(fid)) { | |
611 | result = PTR_ERR(fid); | |
2bad8471 EVH |
612 | if (result == -ENOENT) { |
613 | d_add(dentry, NULL); | |
2bad8471 EVH |
614 | return NULL; |
615 | } | |
2bad8471 | 616 | |
bd238fb4 | 617 | return ERR_PTR(result); |
2bad8471 EVH |
618 | } |
619 | ||
bd238fb4 LI |
620 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
621 | if (IS_ERR(inode)) { | |
622 | result = PTR_ERR(inode); | |
623 | inode = NULL; | |
624 | goto error; | |
2bad8471 EVH |
625 | } |
626 | ||
bd238fb4 | 627 | result = v9fs_fid_add(dentry, fid); |
6a3124a3 | 628 | if (result < 0) |
bd238fb4 | 629 | goto error; |
6a3124a3 | 630 | |
ba17674f | 631 | if ((fid->qid.version) && (v9ses->cache)) |
e03abc0c EVH |
632 | dentry->d_op = &v9fs_cached_dentry_operations; |
633 | else | |
634 | dentry->d_op = &v9fs_dentry_operations; | |
2bad8471 EVH |
635 | |
636 | d_add(dentry, inode); | |
2bad8471 EVH |
637 | return NULL; |
638 | ||
bd238fb4 | 639 | error: |
62aa528e | 640 | p9_client_clunk(fid); |
da977b2c | 641 | |
2bad8471 EVH |
642 | return ERR_PTR(result); |
643 | } | |
644 | ||
645 | /** | |
646 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode | |
647 | * @i: inode that is being unlinked | |
73c592b9 | 648 | * @d: dentry that is being unlinked |
2bad8471 EVH |
649 | * |
650 | */ | |
651 | ||
652 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) | |
653 | { | |
654 | return v9fs_remove(i, d, 0); | |
655 | } | |
656 | ||
657 | /** | |
658 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory | |
659 | * @i: inode that is being unlinked | |
73c592b9 | 660 | * @d: dentry that is being unlinked |
2bad8471 EVH |
661 | * |
662 | */ | |
663 | ||
664 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) | |
665 | { | |
666 | return v9fs_remove(i, d, 1); | |
667 | } | |
668 | ||
669 | /** | |
670 | * v9fs_vfs_rename - VFS hook to rename an inode | |
671 | * @old_dir: old dir inode | |
672 | * @old_dentry: old dentry | |
673 | * @new_dir: new dir inode | |
674 | * @new_dentry: new dentry | |
675 | * | |
676 | */ | |
677 | ||
678 | static int | |
679 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
680 | struct inode *new_dir, struct dentry *new_dentry) | |
681 | { | |
bd238fb4 LI |
682 | struct inode *old_inode; |
683 | struct v9fs_session_info *v9ses; | |
684 | struct p9_fid *oldfid; | |
685 | struct p9_fid *olddirfid; | |
686 | struct p9_fid *newdirfid; | |
687 | struct p9_wstat wstat; | |
688 | int retval; | |
2bad8471 | 689 | |
bd238fb4 LI |
690 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
691 | retval = 0; | |
692 | old_inode = old_dentry->d_inode; | |
693 | v9ses = v9fs_inode2v9ses(old_inode); | |
694 | oldfid = v9fs_fid_lookup(old_dentry); | |
ba17674f | 695 | if (IS_ERR(oldfid)) |
da977b2c EVH |
696 | return PTR_ERR(oldfid); |
697 | ||
698 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); | |
ba17674f | 699 | if (IS_ERR(olddirfid)) { |
da977b2c | 700 | retval = PTR_ERR(olddirfid); |
bd238fb4 | 701 | goto done; |
da977b2c EVH |
702 | } |
703 | ||
704 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); | |
ba17674f | 705 | if (IS_ERR(newdirfid)) { |
da977b2c | 706 | retval = PTR_ERR(newdirfid); |
bd238fb4 | 707 | goto clunk_olddir; |
2bad8471 EVH |
708 | } |
709 | ||
710 | /* 9P can only handle file rename in the same directory */ | |
711 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { | |
bd238fb4 LI |
712 | P9_DPRINTK(P9_DEBUG_ERROR, |
713 | "old dir and new dir are different\n"); | |
621997cd | 714 | retval = -EXDEV; |
bd238fb4 | 715 | goto clunk_newdir; |
2bad8471 EVH |
716 | } |
717 | ||
531b1094 | 718 | v9fs_blank_wstat(&wstat); |
ba17674f | 719 | wstat.muid = v9ses->uname; |
531b1094 | 720 | wstat.name = (char *) new_dentry->d_name.name; |
bd238fb4 | 721 | retval = p9_client_wstat(oldfid, &wstat); |
2bad8471 | 722 | |
bd238fb4 | 723 | clunk_newdir: |
22150c4f | 724 | p9_client_clunk(newdirfid); |
2bad8471 | 725 | |
bd238fb4 | 726 | clunk_olddir: |
22150c4f | 727 | p9_client_clunk(olddirfid); |
da977b2c | 728 | |
bd238fb4 | 729 | done: |
2bad8471 EVH |
730 | return retval; |
731 | } | |
732 | ||
733 | /** | |
943ffb58 | 734 | * v9fs_vfs_getattr - retrieve file metadata |
ee443996 EVH |
735 | * @mnt: mount information |
736 | * @dentry: file to get attributes on | |
737 | * @stat: metadata structure to populate | |
2bad8471 EVH |
738 | * |
739 | */ | |
740 | ||
741 | static int | |
742 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
743 | struct kstat *stat) | |
744 | { | |
bd238fb4 LI |
745 | int err; |
746 | struct v9fs_session_info *v9ses; | |
747 | struct p9_fid *fid; | |
51a87c55 | 748 | struct p9_wstat *st; |
bd238fb4 LI |
749 | |
750 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); | |
751 | err = -EPERM; | |
752 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
9523a841 EVH |
753 | if (v9ses->cache == CACHE_LOOSE) |
754 | return simple_getattr(mnt, dentry, stat); | |
755 | ||
bd238fb4 LI |
756 | fid = v9fs_fid_lookup(dentry); |
757 | if (IS_ERR(fid)) | |
da977b2c | 758 | return PTR_ERR(fid); |
2bad8471 | 759 | |
bd238fb4 LI |
760 | st = p9_client_stat(fid); |
761 | if (IS_ERR(st)) | |
762 | return PTR_ERR(st); | |
2bad8471 | 763 | |
bd238fb4 | 764 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
2bad8471 | 765 | generic_fillattr(dentry->d_inode, stat); |
2bad8471 | 766 | |
bd238fb4 LI |
767 | kfree(st); |
768 | return 0; | |
2bad8471 EVH |
769 | } |
770 | ||
771 | /** | |
772 | * v9fs_vfs_setattr - set file metadata | |
773 | * @dentry: file whose metadata to set | |
774 | * @iattr: metadata assignment structure | |
775 | * | |
776 | */ | |
777 | ||
778 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) | |
779 | { | |
bd238fb4 LI |
780 | int retval; |
781 | struct v9fs_session_info *v9ses; | |
782 | struct p9_fid *fid; | |
783 | struct p9_wstat wstat; | |
2bad8471 | 784 | |
bd238fb4 LI |
785 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
786 | retval = -EPERM; | |
787 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
788 | fid = v9fs_fid_lookup(dentry); | |
da977b2c EVH |
789 | if(IS_ERR(fid)) |
790 | return PTR_ERR(fid); | |
2bad8471 | 791 | |
531b1094 | 792 | v9fs_blank_wstat(&wstat); |
2bad8471 | 793 | if (iattr->ia_valid & ATTR_MODE) |
531b1094 | 794 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
2bad8471 EVH |
795 | |
796 | if (iattr->ia_valid & ATTR_MTIME) | |
531b1094 | 797 | wstat.mtime = iattr->ia_mtime.tv_sec; |
2bad8471 EVH |
798 | |
799 | if (iattr->ia_valid & ATTR_ATIME) | |
531b1094 | 800 | wstat.atime = iattr->ia_atime.tv_sec; |
2bad8471 EVH |
801 | |
802 | if (iattr->ia_valid & ATTR_SIZE) | |
531b1094 | 803 | wstat.length = iattr->ia_size; |
2bad8471 | 804 | |
2405669b | 805 | if (v9fs_extended(v9ses)) { |
531b1094 LI |
806 | if (iattr->ia_valid & ATTR_UID) |
807 | wstat.n_uid = iattr->ia_uid; | |
2bad8471 | 808 | |
531b1094 LI |
809 | if (iattr->ia_valid & ATTR_GID) |
810 | wstat.n_gid = iattr->ia_gid; | |
2bad8471 EVH |
811 | } |
812 | ||
bd238fb4 LI |
813 | retval = p9_client_wstat(fid, &wstat); |
814 | if (retval >= 0) | |
815 | retval = inode_setattr(dentry->d_inode, iattr); | |
2bad8471 | 816 | |
bd238fb4 | 817 | return retval; |
2bad8471 EVH |
818 | } |
819 | ||
820 | /** | |
531b1094 LI |
821 | * v9fs_stat2inode - populate an inode structure with mistat info |
822 | * @stat: Plan 9 metadata (mistat) structure | |
2bad8471 EVH |
823 | * @inode: inode to populate |
824 | * @sb: superblock of filesystem | |
825 | * | |
826 | */ | |
827 | ||
828 | void | |
51a87c55 | 829 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
531b1094 | 830 | struct super_block *sb) |
2bad8471 | 831 | { |
531b1094 | 832 | char ext[32]; |
2bad8471 EVH |
833 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
834 | ||
835 | inode->i_nlink = 1; | |
836 | ||
531b1094 LI |
837 | inode->i_atime.tv_sec = stat->atime; |
838 | inode->i_mtime.tv_sec = stat->mtime; | |
839 | inode->i_ctime.tv_sec = stat->mtime; | |
2bad8471 | 840 | |
bd32b82d LI |
841 | inode->i_uid = v9ses->dfltuid; |
842 | inode->i_gid = v9ses->dfltgid; | |
2bad8471 | 843 | |
2405669b | 844 | if (v9fs_extended(v9ses)) { |
531b1094 LI |
845 | inode->i_uid = stat->n_uid; |
846 | inode->i_gid = stat->n_gid; | |
2bad8471 EVH |
847 | } |
848 | ||
531b1094 | 849 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
2bad8471 EVH |
850 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
851 | char type = 0; | |
852 | int major = -1; | |
853 | int minor = -1; | |
531b1094 | 854 | |
51a87c55 | 855 | strncpy(ext, stat->extension, sizeof(ext)); |
531b1094 | 856 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
2bad8471 EVH |
857 | switch (type) { |
858 | case 'c': | |
859 | inode->i_mode &= ~S_IFBLK; | |
860 | inode->i_mode |= S_IFCHR; | |
861 | break; | |
862 | case 'b': | |
863 | break; | |
864 | default: | |
bd238fb4 | 865 | P9_DPRINTK(P9_DEBUG_ERROR, |
51a87c55 EVH |
866 | "Unknown special type %c %s\n", type, |
867 | stat->extension); | |
2bad8471 EVH |
868 | }; |
869 | inode->i_rdev = MKDEV(major, minor); | |
57c7b4e6 | 870 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
2bad8471 EVH |
871 | } else |
872 | inode->i_rdev = 0; | |
873 | ||
531b1094 | 874 | inode->i_size = stat->length; |
2bad8471 | 875 | |
bd238fb4 LI |
876 | /* not real number of blocks, but 512 byte ones ... */ |
877 | inode->i_blocks = (inode->i_size + 512 - 1) >> 9; | |
2bad8471 EVH |
878 | } |
879 | ||
880 | /** | |
881 | * v9fs_qid2ino - convert qid into inode number | |
882 | * @qid: qid to hash | |
883 | * | |
884 | * BUG: potential for inode number collisions? | |
885 | */ | |
886 | ||
bd238fb4 | 887 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
2bad8471 EVH |
888 | { |
889 | u64 path = qid->path + 2; | |
890 | ino_t i = 0; | |
891 | ||
892 | if (sizeof(ino_t) == sizeof(path)) | |
893 | memcpy(&i, &path, sizeof(ino_t)); | |
894 | else | |
895 | i = (ino_t) (path ^ (path >> 32)); | |
896 | ||
897 | return i; | |
898 | } | |
899 | ||
2bad8471 EVH |
900 | /** |
901 | * v9fs_readlink - read a symlink's location (internal version) | |
902 | * @dentry: dentry for symlink | |
73c592b9 | 903 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
904 | * @buflen: length of buffer |
905 | * | |
906 | */ | |
907 | ||
908 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) | |
909 | { | |
bd238fb4 | 910 | int retval; |
2bad8471 | 911 | |
bd238fb4 LI |
912 | struct v9fs_session_info *v9ses; |
913 | struct p9_fid *fid; | |
51a87c55 | 914 | struct p9_wstat *st; |
2bad8471 | 915 | |
bd238fb4 LI |
916 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
917 | retval = -EPERM; | |
918 | v9ses = v9fs_inode2v9ses(dentry->d_inode); | |
919 | fid = v9fs_fid_lookup(dentry); | |
ba17674f | 920 | if (IS_ERR(fid)) |
da977b2c | 921 | return PTR_ERR(fid); |
2bad8471 | 922 | |
2405669b | 923 | if (!v9fs_extended(v9ses)) |
bd238fb4 | 924 | return -EBADF; |
2bad8471 | 925 | |
bd238fb4 LI |
926 | st = p9_client_stat(fid); |
927 | if (IS_ERR(st)) | |
928 | return PTR_ERR(st); | |
2bad8471 | 929 | |
bd238fb4 | 930 | if (!(st->mode & P9_DMSYMLINK)) { |
2bad8471 | 931 | retval = -EINVAL; |
bd238fb4 | 932 | goto done; |
2bad8471 EVH |
933 | } |
934 | ||
935 | /* copy extension buffer into buffer */ | |
51a87c55 | 936 | strncpy(buffer, st->extension, buflen); |
2bad8471 | 937 | |
bd238fb4 | 938 | P9_DPRINTK(P9_DEBUG_VFS, |
51a87c55 | 939 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
2bad8471 | 940 | |
bd238fb4 | 941 | retval = buflen; |
da977b2c | 942 | |
bd238fb4 LI |
943 | done: |
944 | kfree(st); | |
2bad8471 EVH |
945 | return retval; |
946 | } | |
947 | ||
948 | /** | |
949 | * v9fs_vfs_readlink - read a symlink's location | |
950 | * @dentry: dentry for symlink | |
ee443996 | 951 | * @buffer: buffer to load symlink location into |
2bad8471 EVH |
952 | * @buflen: length of buffer |
953 | * | |
954 | */ | |
955 | ||
956 | static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, | |
957 | int buflen) | |
958 | { | |
959 | int retval; | |
960 | int ret; | |
961 | char *link = __getname(); | |
962 | ||
0710d36a FM |
963 | if (unlikely(!link)) |
964 | return -ENOMEM; | |
965 | ||
a1f9d8d2 LI |
966 | if (buflen > PATH_MAX) |
967 | buflen = PATH_MAX; | |
2bad8471 | 968 | |
7dd0cdc5 WF |
969 | P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, |
970 | dentry); | |
2bad8471 EVH |
971 | |
972 | retval = v9fs_readlink(dentry, link, buflen); | |
973 | ||
974 | if (retval > 0) { | |
975 | if ((ret = copy_to_user(buffer, link, retval)) != 0) { | |
bd238fb4 LI |
976 | P9_DPRINTK(P9_DEBUG_ERROR, |
977 | "problem copying to user: %d\n", ret); | |
2bad8471 EVH |
978 | retval = ret; |
979 | } | |
980 | } | |
981 | ||
ce44eeb6 | 982 | __putname(link); |
2bad8471 EVH |
983 | return retval; |
984 | } | |
985 | ||
986 | /** | |
987 | * v9fs_vfs_follow_link - follow a symlink path | |
988 | * @dentry: dentry for symlink | |
989 | * @nd: nameidata | |
990 | * | |
991 | */ | |
992 | ||
993 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) | |
994 | { | |
995 | int len = 0; | |
996 | char *link = __getname(); | |
997 | ||
bd238fb4 | 998 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
2bad8471 EVH |
999 | |
1000 | if (!link) | |
1001 | link = ERR_PTR(-ENOMEM); | |
1002 | else { | |
16cce6d2 | 1003 | len = v9fs_readlink(dentry, link, PATH_MAX); |
2bad8471 EVH |
1004 | |
1005 | if (len < 0) { | |
ce44eeb6 | 1006 | __putname(link); |
2bad8471 EVH |
1007 | link = ERR_PTR(len); |
1008 | } else | |
1009 | link[len] = 0; | |
1010 | } | |
1011 | nd_set_link(nd, link); | |
1012 | ||
1013 | return NULL; | |
1014 | } | |
1015 | ||
1016 | /** | |
1017 | * v9fs_vfs_put_link - release a symlink path | |
1018 | * @dentry: dentry for symlink | |
1019 | * @nd: nameidata | |
ee443996 | 1020 | * @p: unused |
2bad8471 EVH |
1021 | * |
1022 | */ | |
1023 | ||
ee443996 EVH |
1024 | static void |
1025 | v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) | |
2bad8471 EVH |
1026 | { |
1027 | char *s = nd_get_link(nd); | |
1028 | ||
6ff23207 DG |
1029 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
1030 | IS_ERR(s) ? "<error>" : s); | |
2bad8471 | 1031 | if (!IS_ERR(s)) |
ce44eeb6 | 1032 | __putname(s); |
2bad8471 EVH |
1033 | } |
1034 | ||
ee443996 EVH |
1035 | /** |
1036 | * v9fs_vfs_mkspecial - create a special file | |
1037 | * @dir: inode to create special file in | |
1038 | * @dentry: dentry to create | |
1039 | * @mode: mode to create special file | |
1040 | * @extension: 9p2000.u format extension string representing special file | |
1041 | * | |
1042 | */ | |
1043 | ||
531b1094 LI |
1044 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
1045 | int mode, const char *extension) | |
2bad8471 | 1046 | { |
bd238fb4 | 1047 | u32 perm; |
531b1094 | 1048 | struct v9fs_session_info *v9ses; |
bd238fb4 | 1049 | struct p9_fid *fid; |
2bad8471 | 1050 | |
6a3124a3 | 1051 | v9ses = v9fs_inode2v9ses(dir); |
2405669b | 1052 | if (!v9fs_extended(v9ses)) { |
bd238fb4 | 1053 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
6a3124a3 | 1054 | return -EPERM; |
2bad8471 EVH |
1055 | } |
1056 | ||
da977b2c | 1057 | perm = unixmode2p9mode(v9ses, mode); |
bd238fb4 LI |
1058 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
1059 | P9_OREAD); | |
1060 | if (IS_ERR(fid)) | |
1061 | return PTR_ERR(fid); | |
da977b2c | 1062 | |
bd238fb4 | 1063 | p9_client_clunk(fid); |
6a3124a3 | 1064 | return 0; |
531b1094 LI |
1065 | } |
1066 | ||
1067 | /** | |
1068 | * v9fs_vfs_symlink - helper function to create symlinks | |
1069 | * @dir: directory inode containing symlink | |
1070 | * @dentry: dentry for symlink | |
1071 | * @symname: symlink data | |
1072 | * | |
ee443996 | 1073 | * See Also: 9P2000.u RFC for more information |
531b1094 LI |
1074 | * |
1075 | */ | |
1076 | ||
1077 | static int | |
1078 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) | |
1079 | { | |
bd238fb4 LI |
1080 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
1081 | dentry->d_name.name, symname); | |
531b1094 LI |
1082 | |
1083 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); | |
1084 | } | |
1085 | ||
1086 | /** | |
1087 | * v9fs_vfs_link - create a hardlink | |
1088 | * @old_dentry: dentry for file to link to | |
1089 | * @dir: inode destination for new link | |
1090 | * @dentry: dentry for link | |
1091 | * | |
1092 | */ | |
1093 | ||
531b1094 LI |
1094 | static int |
1095 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, | |
1096 | struct dentry *dentry) | |
1097 | { | |
1098 | int retval; | |
bd238fb4 | 1099 | struct p9_fid *oldfid; |
531b1094 LI |
1100 | char *name; |
1101 | ||
bd238fb4 LI |
1102 | P9_DPRINTK(P9_DEBUG_VFS, |
1103 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, | |
531b1094 LI |
1104 | old_dentry->d_name.name); |
1105 | ||
da977b2c | 1106 | oldfid = v9fs_fid_clone(old_dentry); |
ba17674f | 1107 | if (IS_ERR(oldfid)) |
da977b2c | 1108 | return PTR_ERR(oldfid); |
531b1094 LI |
1109 | |
1110 | name = __getname(); | |
da977b2c EVH |
1111 | if (unlikely(!name)) { |
1112 | retval = -ENOMEM; | |
1113 | goto clunk_fid; | |
1114 | } | |
0710d36a | 1115 | |
16cce6d2 | 1116 | sprintf(name, "%d\n", oldfid->fid); |
bd238fb4 | 1117 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
531b1094 | 1118 | __putname(name); |
2bad8471 | 1119 | |
da977b2c | 1120 | clunk_fid: |
bd238fb4 | 1121 | p9_client_clunk(oldfid); |
2bad8471 EVH |
1122 | return retval; |
1123 | } | |
1124 | ||
1125 | /** | |
1126 | * v9fs_vfs_mknod - create a special file | |
1127 | * @dir: inode destination for new link | |
1128 | * @dentry: dentry for file | |
1129 | * @mode: mode for creation | |
ee443996 | 1130 | * @rdev: device associated with special file |
2bad8471 EVH |
1131 | * |
1132 | */ | |
1133 | ||
1134 | static int | |
1135 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) | |
1136 | { | |
531b1094 LI |
1137 | int retval; |
1138 | char *name; | |
2bad8471 | 1139 | |
bd238fb4 LI |
1140 | P9_DPRINTK(P9_DEBUG_VFS, |
1141 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, | |
2bad8471 EVH |
1142 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
1143 | ||
531b1094 LI |
1144 | if (!new_valid_dev(rdev)) |
1145 | return -EINVAL; | |
2bad8471 | 1146 | |
531b1094 | 1147 | name = __getname(); |
c0291a05 ET |
1148 | if (!name) |
1149 | return -ENOMEM; | |
2bad8471 EVH |
1150 | /* build extension */ |
1151 | if (S_ISBLK(mode)) | |
531b1094 | 1152 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
2bad8471 | 1153 | else if (S_ISCHR(mode)) |
531b1094 | 1154 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
73c592b9 | 1155 | else if (S_ISFIFO(mode)) |
531b1094 | 1156 | *name = 0; |
2bad8471 | 1157 | else { |
531b1094 LI |
1158 | __putname(name); |
1159 | return -EINVAL; | |
2bad8471 EVH |
1160 | } |
1161 | ||
531b1094 LI |
1162 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
1163 | __putname(name); | |
2bad8471 EVH |
1164 | |
1165 | return retval; | |
1166 | } | |
1167 | ||
754661f1 | 1168 | static const struct inode_operations v9fs_dir_inode_operations_ext = { |
2bad8471 EVH |
1169 | .create = v9fs_vfs_create, |
1170 | .lookup = v9fs_vfs_lookup, | |
1171 | .symlink = v9fs_vfs_symlink, | |
1172 | .link = v9fs_vfs_link, | |
1173 | .unlink = v9fs_vfs_unlink, | |
1174 | .mkdir = v9fs_vfs_mkdir, | |
1175 | .rmdir = v9fs_vfs_rmdir, | |
1176 | .mknod = v9fs_vfs_mknod, | |
1177 | .rename = v9fs_vfs_rename, | |
1178 | .readlink = v9fs_vfs_readlink, | |
1179 | .getattr = v9fs_vfs_getattr, | |
1180 | .setattr = v9fs_vfs_setattr, | |
1181 | }; | |
1182 | ||
754661f1 | 1183 | static const struct inode_operations v9fs_dir_inode_operations = { |
b501611a EVH |
1184 | .create = v9fs_vfs_create, |
1185 | .lookup = v9fs_vfs_lookup, | |
1186 | .unlink = v9fs_vfs_unlink, | |
1187 | .mkdir = v9fs_vfs_mkdir, | |
1188 | .rmdir = v9fs_vfs_rmdir, | |
1189 | .mknod = v9fs_vfs_mknod, | |
1190 | .rename = v9fs_vfs_rename, | |
1191 | .getattr = v9fs_vfs_getattr, | |
1192 | .setattr = v9fs_vfs_setattr, | |
1193 | }; | |
1194 | ||
754661f1 | 1195 | static const struct inode_operations v9fs_file_inode_operations = { |
2bad8471 EVH |
1196 | .getattr = v9fs_vfs_getattr, |
1197 | .setattr = v9fs_vfs_setattr, | |
1198 | }; | |
1199 | ||
754661f1 | 1200 | static const struct inode_operations v9fs_symlink_inode_operations = { |
2bad8471 EVH |
1201 | .readlink = v9fs_vfs_readlink, |
1202 | .follow_link = v9fs_vfs_follow_link, | |
1203 | .put_link = v9fs_vfs_put_link, | |
1204 | .getattr = v9fs_vfs_getattr, | |
1205 | .setattr = v9fs_vfs_setattr, | |
1206 | }; |