]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. | |
4 | * | |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
7 | * of the GNU General Public License version 2. | |
8 | */ | |
9 | ||
10 | #include <linux/slab.h> | |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/namei.h> | |
15 | #include <linux/utsname.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/xattr.h> | |
18 | #include <linux/posix_acl.h> | |
19 | #include <linux/gfs2_ondisk.h> | |
20 | #include <linux/crc32.h> | |
21 | #include <linux/fiemap.h> | |
22 | #include <asm/uaccess.h> | |
23 | ||
24 | #include "gfs2.h" | |
25 | #include "incore.h" | |
26 | #include "acl.h" | |
27 | #include "bmap.h" | |
28 | #include "dir.h" | |
29 | #include "eaops.h" | |
30 | #include "eattr.h" | |
31 | #include "glock.h" | |
32 | #include "inode.h" | |
33 | #include "meta_io.h" | |
34 | #include "quota.h" | |
35 | #include "rgrp.h" | |
36 | #include "trans.h" | |
37 | #include "util.h" | |
38 | #include "super.h" | |
39 | ||
40 | /** | |
41 | * gfs2_create - Create a file | |
42 | * @dir: The directory in which to create the file | |
43 | * @dentry: The dentry of the new file | |
44 | * @mode: The mode of the new file | |
45 | * | |
46 | * Returns: errno | |
47 | */ | |
48 | ||
49 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
50 | int mode, struct nameidata *nd) | |
51 | { | |
52 | struct gfs2_inode *dip = GFS2_I(dir); | |
53 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
54 | struct gfs2_holder ghs[2]; | |
55 | struct inode *inode; | |
56 | ||
57 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
58 | ||
59 | for (;;) { | |
60 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0); | |
61 | if (!IS_ERR(inode)) { | |
62 | gfs2_trans_end(sdp); | |
63 | if (dip->i_alloc->al_rgd) | |
64 | gfs2_inplace_release(dip); | |
65 | gfs2_quota_unlock(dip); | |
66 | gfs2_alloc_put(dip); | |
67 | gfs2_glock_dq_uninit_m(2, ghs); | |
68 | mark_inode_dirty(inode); | |
69 | break; | |
70 | } else if (PTR_ERR(inode) != -EEXIST || | |
71 | (nd && nd->flags & LOOKUP_EXCL)) { | |
72 | gfs2_holder_uninit(ghs); | |
73 | return PTR_ERR(inode); | |
74 | } | |
75 | ||
76 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
77 | if (inode) { | |
78 | if (!IS_ERR(inode)) { | |
79 | gfs2_holder_uninit(ghs); | |
80 | break; | |
81 | } else { | |
82 | gfs2_holder_uninit(ghs); | |
83 | return PTR_ERR(inode); | |
84 | } | |
85 | } | |
86 | } | |
87 | ||
88 | d_instantiate(dentry, inode); | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | /** | |
94 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
95 | * @dir: The directory inode | |
96 | * @dentry: The dentry of the new inode | |
97 | * @nd: passed from Linux VFS, ignored by us | |
98 | * | |
99 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
100 | * | |
101 | * Returns: errno | |
102 | */ | |
103 | ||
104 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
105 | struct nameidata *nd) | |
106 | { | |
107 | struct inode *inode = NULL; | |
108 | ||
109 | dentry->d_op = &gfs2_dops; | |
110 | ||
111 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
112 | if (inode && IS_ERR(inode)) | |
113 | return ERR_CAST(inode); | |
114 | ||
115 | if (inode) { | |
116 | struct gfs2_glock *gl = GFS2_I(inode)->i_gl; | |
117 | struct gfs2_holder gh; | |
118 | int error; | |
119 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
120 | if (error) { | |
121 | iput(inode); | |
122 | return ERR_PTR(error); | |
123 | } | |
124 | gfs2_glock_dq_uninit(&gh); | |
125 | return d_splice_alias(inode, dentry); | |
126 | } | |
127 | d_add(dentry, inode); | |
128 | ||
129 | return NULL; | |
130 | } | |
131 | ||
132 | /** | |
133 | * gfs2_link - Link to a file | |
134 | * @old_dentry: The inode to link | |
135 | * @dir: Add link to this directory | |
136 | * @dentry: The name of the link | |
137 | * | |
138 | * Link the inode in "old_dentry" into the directory "dir" with the | |
139 | * name in "dentry". | |
140 | * | |
141 | * Returns: errno | |
142 | */ | |
143 | ||
144 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
145 | struct dentry *dentry) | |
146 | { | |
147 | struct gfs2_inode *dip = GFS2_I(dir); | |
148 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
149 | struct inode *inode = old_dentry->d_inode; | |
150 | struct gfs2_inode *ip = GFS2_I(inode); | |
151 | struct gfs2_holder ghs[2]; | |
152 | int alloc_required; | |
153 | int error; | |
154 | ||
155 | if (S_ISDIR(inode->i_mode)) | |
156 | return -EPERM; | |
157 | ||
158 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
159 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
160 | ||
161 | error = gfs2_glock_nq(ghs); /* parent */ | |
162 | if (error) | |
163 | goto out_parent; | |
164 | ||
165 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
166 | if (error) | |
167 | goto out_child; | |
168 | ||
169 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); | |
170 | if (error) | |
171 | goto out_gunlock; | |
172 | ||
173 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); | |
174 | switch (error) { | |
175 | case -ENOENT: | |
176 | break; | |
177 | case 0: | |
178 | error = -EEXIST; | |
179 | default: | |
180 | goto out_gunlock; | |
181 | } | |
182 | ||
183 | error = -EINVAL; | |
184 | if (!dip->i_inode.i_nlink) | |
185 | goto out_gunlock; | |
186 | error = -EFBIG; | |
187 | if (dip->i_entries == (u32)-1) | |
188 | goto out_gunlock; | |
189 | error = -EPERM; | |
190 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
191 | goto out_gunlock; | |
192 | error = -EINVAL; | |
193 | if (!ip->i_inode.i_nlink) | |
194 | goto out_gunlock; | |
195 | error = -EMLINK; | |
196 | if (ip->i_inode.i_nlink == (u32)-1) | |
197 | goto out_gunlock; | |
198 | ||
199 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); | |
200 | if (error < 0) | |
201 | goto out_gunlock; | |
202 | error = 0; | |
203 | ||
204 | if (alloc_required) { | |
205 | struct gfs2_alloc *al = gfs2_alloc_get(dip); | |
206 | if (!al) { | |
207 | error = -ENOMEM; | |
208 | goto out_gunlock; | |
209 | } | |
210 | ||
211 | error = gfs2_quota_lock_check(dip); | |
212 | if (error) | |
213 | goto out_alloc; | |
214 | ||
215 | al->al_requested = sdp->sd_max_dirres; | |
216 | ||
217 | error = gfs2_inplace_reserve(dip); | |
218 | if (error) | |
219 | goto out_gunlock_q; | |
220 | ||
221 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + | |
222 | al->al_rgd->rd_length + | |
223 | 2 * RES_DINODE + RES_STATFS + | |
224 | RES_QUOTA, 0); | |
225 | if (error) | |
226 | goto out_ipres; | |
227 | } else { | |
228 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
229 | if (error) | |
230 | goto out_ipres; | |
231 | } | |
232 | ||
233 | error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode)); | |
234 | if (error) | |
235 | goto out_end_trans; | |
236 | ||
237 | error = gfs2_change_nlink(ip, +1); | |
238 | ||
239 | out_end_trans: | |
240 | gfs2_trans_end(sdp); | |
241 | out_ipres: | |
242 | if (alloc_required) | |
243 | gfs2_inplace_release(dip); | |
244 | out_gunlock_q: | |
245 | if (alloc_required) | |
246 | gfs2_quota_unlock(dip); | |
247 | out_alloc: | |
248 | if (alloc_required) | |
249 | gfs2_alloc_put(dip); | |
250 | out_gunlock: | |
251 | gfs2_glock_dq(ghs + 1); | |
252 | out_child: | |
253 | gfs2_glock_dq(ghs); | |
254 | out_parent: | |
255 | gfs2_holder_uninit(ghs); | |
256 | gfs2_holder_uninit(ghs + 1); | |
257 | if (!error) { | |
258 | atomic_inc(&inode->i_count); | |
259 | d_instantiate(dentry, inode); | |
260 | mark_inode_dirty(inode); | |
261 | } | |
262 | return error; | |
263 | } | |
264 | ||
265 | /** | |
266 | * gfs2_unlink - Unlink a file | |
267 | * @dir: The inode of the directory containing the file to unlink | |
268 | * @dentry: The file itself | |
269 | * | |
270 | * Unlink a file. Call gfs2_unlinki() | |
271 | * | |
272 | * Returns: errno | |
273 | */ | |
274 | ||
275 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
276 | { | |
277 | struct gfs2_inode *dip = GFS2_I(dir); | |
278 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
279 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
280 | struct gfs2_holder ghs[3]; | |
281 | struct gfs2_rgrpd *rgd; | |
282 | struct gfs2_holder ri_gh; | |
283 | int error; | |
284 | ||
285 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
286 | if (error) | |
287 | return error; | |
288 | ||
289 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
290 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
291 | ||
292 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); | |
293 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); | |
294 | ||
295 | ||
296 | error = gfs2_glock_nq(ghs); /* parent */ | |
297 | if (error) | |
298 | goto out_parent; | |
299 | ||
300 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
301 | if (error) | |
302 | goto out_child; | |
303 | ||
304 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ | |
305 | if (error) | |
306 | goto out_rgrp; | |
307 | ||
308 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
309 | if (error) | |
310 | goto out_gunlock; | |
311 | ||
312 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); | |
313 | if (error) | |
314 | goto out_rgrp; | |
315 | ||
316 | error = gfs2_dir_del(dip, &dentry->d_name); | |
317 | if (error) | |
318 | goto out_end_trans; | |
319 | ||
320 | error = gfs2_change_nlink(ip, -1); | |
321 | ||
322 | out_end_trans: | |
323 | gfs2_trans_end(sdp); | |
324 | out_gunlock: | |
325 | gfs2_glock_dq(ghs + 2); | |
326 | out_rgrp: | |
327 | gfs2_holder_uninit(ghs + 2); | |
328 | gfs2_glock_dq(ghs + 1); | |
329 | out_child: | |
330 | gfs2_holder_uninit(ghs + 1); | |
331 | gfs2_glock_dq(ghs); | |
332 | out_parent: | |
333 | gfs2_holder_uninit(ghs); | |
334 | gfs2_glock_dq_uninit(&ri_gh); | |
335 | return error; | |
336 | } | |
337 | ||
338 | /** | |
339 | * gfs2_symlink - Create a symlink | |
340 | * @dir: The directory to create the symlink in | |
341 | * @dentry: The dentry to put the symlink in | |
342 | * @symname: The thing which the link points to | |
343 | * | |
344 | * Returns: errno | |
345 | */ | |
346 | ||
347 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
348 | const char *symname) | |
349 | { | |
350 | struct gfs2_inode *dip = GFS2_I(dir), *ip; | |
351 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
352 | struct gfs2_holder ghs[2]; | |
353 | struct inode *inode; | |
354 | struct buffer_head *dibh; | |
355 | int size; | |
356 | int error; | |
357 | ||
358 | /* Must be stuffed with a null terminator for gfs2_follow_link() */ | |
359 | size = strlen(symname); | |
360 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
361 | return -ENAMETOOLONG; | |
362 | ||
363 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
364 | ||
365 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0); | |
366 | if (IS_ERR(inode)) { | |
367 | gfs2_holder_uninit(ghs); | |
368 | return PTR_ERR(inode); | |
369 | } | |
370 | ||
371 | ip = ghs[1].gh_gl->gl_object; | |
372 | ||
373 | ip->i_disksize = size; | |
374 | ||
375 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
376 | ||
377 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
378 | gfs2_dinode_out(ip, dibh->b_data); | |
379 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, | |
380 | size); | |
381 | brelse(dibh); | |
382 | } | |
383 | ||
384 | gfs2_trans_end(sdp); | |
385 | if (dip->i_alloc->al_rgd) | |
386 | gfs2_inplace_release(dip); | |
387 | gfs2_quota_unlock(dip); | |
388 | gfs2_alloc_put(dip); | |
389 | ||
390 | gfs2_glock_dq_uninit_m(2, ghs); | |
391 | ||
392 | d_instantiate(dentry, inode); | |
393 | mark_inode_dirty(inode); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | /** | |
399 | * gfs2_mkdir - Make a directory | |
400 | * @dir: The parent directory of the new one | |
401 | * @dentry: The dentry of the new directory | |
402 | * @mode: The mode of the new directory | |
403 | * | |
404 | * Returns: errno | |
405 | */ | |
406 | ||
407 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
408 | { | |
409 | struct gfs2_inode *dip = GFS2_I(dir), *ip; | |
410 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
411 | struct gfs2_holder ghs[2]; | |
412 | struct inode *inode; | |
413 | struct buffer_head *dibh; | |
414 | int error; | |
415 | ||
416 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
417 | ||
418 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0); | |
419 | if (IS_ERR(inode)) { | |
420 | gfs2_holder_uninit(ghs); | |
421 | return PTR_ERR(inode); | |
422 | } | |
423 | ||
424 | ip = ghs[1].gh_gl->gl_object; | |
425 | ||
426 | ip->i_inode.i_nlink = 2; | |
427 | ip->i_disksize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); | |
428 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
429 | ip->i_entries = 2; | |
430 | ||
431 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
432 | ||
433 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
434 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
435 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
436 | struct qstr str; | |
437 | ||
438 | gfs2_str2qstr(&str, "."); | |
439 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
440 | gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent); | |
441 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
442 | dent->de_type = cpu_to_be16(DT_DIR); | |
443 | di->di_entries = cpu_to_be32(1); | |
444 | ||
445 | gfs2_str2qstr(&str, ".."); | |
446 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
447 | gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
448 | ||
449 | gfs2_inum_out(dip, dent); | |
450 | dent->de_type = cpu_to_be16(DT_DIR); | |
451 | ||
452 | gfs2_dinode_out(ip, di); | |
453 | ||
454 | brelse(dibh); | |
455 | } | |
456 | ||
457 | error = gfs2_change_nlink(dip, +1); | |
458 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ | |
459 | ||
460 | gfs2_trans_end(sdp); | |
461 | if (dip->i_alloc->al_rgd) | |
462 | gfs2_inplace_release(dip); | |
463 | gfs2_quota_unlock(dip); | |
464 | gfs2_alloc_put(dip); | |
465 | ||
466 | gfs2_glock_dq_uninit_m(2, ghs); | |
467 | ||
468 | d_instantiate(dentry, inode); | |
469 | mark_inode_dirty(inode); | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | /** | |
475 | * gfs2_rmdir - Remove a directory | |
476 | * @dir: The parent directory of the directory to be removed | |
477 | * @dentry: The dentry of the directory to remove | |
478 | * | |
479 | * Remove a directory. Call gfs2_rmdiri() | |
480 | * | |
481 | * Returns: errno | |
482 | */ | |
483 | ||
484 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) | |
485 | { | |
486 | struct gfs2_inode *dip = GFS2_I(dir); | |
487 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
488 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
489 | struct gfs2_holder ghs[3]; | |
490 | struct gfs2_rgrpd *rgd; | |
491 | struct gfs2_holder ri_gh; | |
492 | int error; | |
493 | ||
494 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
495 | if (error) | |
496 | return error; | |
497 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
498 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
499 | ||
500 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); | |
501 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); | |
502 | ||
503 | error = gfs2_glock_nq(ghs); /* parent */ | |
504 | if (error) | |
505 | goto out_parent; | |
506 | ||
507 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
508 | if (error) | |
509 | goto out_child; | |
510 | ||
511 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ | |
512 | if (error) | |
513 | goto out_rgrp; | |
514 | ||
515 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
516 | if (error) | |
517 | goto out_gunlock; | |
518 | ||
519 | if (ip->i_entries < 2) { | |
520 | if (gfs2_consist_inode(ip)) | |
521 | gfs2_dinode_print(ip); | |
522 | error = -EIO; | |
523 | goto out_gunlock; | |
524 | } | |
525 | if (ip->i_entries > 2) { | |
526 | error = -ENOTEMPTY; | |
527 | goto out_gunlock; | |
528 | } | |
529 | ||
530 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); | |
531 | if (error) | |
532 | goto out_gunlock; | |
533 | ||
534 | error = gfs2_rmdiri(dip, &dentry->d_name, ip); | |
535 | ||
536 | gfs2_trans_end(sdp); | |
537 | ||
538 | out_gunlock: | |
539 | gfs2_glock_dq(ghs + 2); | |
540 | out_rgrp: | |
541 | gfs2_holder_uninit(ghs + 2); | |
542 | gfs2_glock_dq(ghs + 1); | |
543 | out_child: | |
544 | gfs2_holder_uninit(ghs + 1); | |
545 | gfs2_glock_dq(ghs); | |
546 | out_parent: | |
547 | gfs2_holder_uninit(ghs); | |
548 | gfs2_glock_dq_uninit(&ri_gh); | |
549 | return error; | |
550 | } | |
551 | ||
552 | /** | |
553 | * gfs2_mknod - Make a special file | |
554 | * @dir: The directory in which the special file will reside | |
555 | * @dentry: The dentry of the special file | |
556 | * @mode: The mode of the special file | |
557 | * @rdev: The device specification of the special file | |
558 | * | |
559 | */ | |
560 | ||
561 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
562 | dev_t dev) | |
563 | { | |
564 | struct gfs2_inode *dip = GFS2_I(dir); | |
565 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
566 | struct gfs2_holder ghs[2]; | |
567 | struct inode *inode; | |
568 | ||
569 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
570 | ||
571 | inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); | |
572 | if (IS_ERR(inode)) { | |
573 | gfs2_holder_uninit(ghs); | |
574 | return PTR_ERR(inode); | |
575 | } | |
576 | ||
577 | gfs2_trans_end(sdp); | |
578 | if (dip->i_alloc->al_rgd) | |
579 | gfs2_inplace_release(dip); | |
580 | gfs2_quota_unlock(dip); | |
581 | gfs2_alloc_put(dip); | |
582 | ||
583 | gfs2_glock_dq_uninit_m(2, ghs); | |
584 | ||
585 | d_instantiate(dentry, inode); | |
586 | mark_inode_dirty(inode); | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | /* | |
592 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
593 | * @this: move this | |
594 | * @to: to here | |
595 | * | |
596 | * Follow @to back to the root and make sure we don't encounter @this | |
597 | * Assumes we already hold the rename lock. | |
598 | * | |
599 | * Returns: errno | |
600 | */ | |
601 | ||
602 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
603 | { | |
604 | struct inode *dir = &to->i_inode; | |
605 | struct super_block *sb = dir->i_sb; | |
606 | struct inode *tmp; | |
607 | struct qstr dotdot; | |
608 | int error = 0; | |
609 | ||
610 | gfs2_str2qstr(&dotdot, ".."); | |
611 | ||
612 | igrab(dir); | |
613 | ||
614 | for (;;) { | |
615 | if (dir == &this->i_inode) { | |
616 | error = -EINVAL; | |
617 | break; | |
618 | } | |
619 | if (dir == sb->s_root->d_inode) { | |
620 | error = 0; | |
621 | break; | |
622 | } | |
623 | ||
624 | tmp = gfs2_lookupi(dir, &dotdot, 1); | |
625 | if (IS_ERR(tmp)) { | |
626 | error = PTR_ERR(tmp); | |
627 | break; | |
628 | } | |
629 | ||
630 | iput(dir); | |
631 | dir = tmp; | |
632 | } | |
633 | ||
634 | iput(dir); | |
635 | ||
636 | return error; | |
637 | } | |
638 | ||
639 | /** | |
640 | * gfs2_rename - Rename a file | |
641 | * @odir: Parent directory of old file name | |
642 | * @odentry: The old dentry of the file | |
643 | * @ndir: Parent directory of new file name | |
644 | * @ndentry: The new dentry of the file | |
645 | * | |
646 | * Returns: errno | |
647 | */ | |
648 | ||
649 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
650 | struct inode *ndir, struct dentry *ndentry) | |
651 | { | |
652 | struct gfs2_inode *odip = GFS2_I(odir); | |
653 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
654 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
655 | struct gfs2_inode *nip = NULL; | |
656 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
657 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; | |
658 | struct gfs2_rgrpd *nrgd; | |
659 | unsigned int num_gh; | |
660 | int dir_rename = 0; | |
661 | int alloc_required; | |
662 | unsigned int x; | |
663 | int error; | |
664 | ||
665 | if (ndentry->d_inode) { | |
666 | nip = GFS2_I(ndentry->d_inode); | |
667 | if (ip == nip) | |
668 | return 0; | |
669 | } | |
670 | ||
671 | ||
672 | if (odip != ndip) { | |
673 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
674 | 0, &r_gh); | |
675 | if (error) | |
676 | goto out; | |
677 | ||
678 | if (S_ISDIR(ip->i_inode.i_mode)) { | |
679 | dir_rename = 1; | |
680 | /* don't move a dirctory into it's subdir */ | |
681 | error = gfs2_ok_to_move(ip, ndip); | |
682 | if (error) | |
683 | goto out_gunlock_r; | |
684 | } | |
685 | } | |
686 | ||
687 | num_gh = 1; | |
688 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
689 | if (odip != ndip) { | |
690 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
691 | num_gh++; | |
692 | } | |
693 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
694 | num_gh++; | |
695 | ||
696 | if (nip) { | |
697 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
698 | num_gh++; | |
699 | /* grab the resource lock for unlink flag twiddling | |
700 | * this is the case of the target file already existing | |
701 | * so we unlink before doing the rename | |
702 | */ | |
703 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); | |
704 | if (nrgd) | |
705 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
706 | } | |
707 | ||
708 | for (x = 0; x < num_gh; x++) { | |
709 | error = gfs2_glock_nq(ghs + x); | |
710 | if (error) | |
711 | goto out_gunlock; | |
712 | } | |
713 | ||
714 | /* Check out the old directory */ | |
715 | ||
716 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
717 | if (error) | |
718 | goto out_gunlock; | |
719 | ||
720 | /* Check out the new directory */ | |
721 | ||
722 | if (nip) { | |
723 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
724 | if (error) | |
725 | goto out_gunlock; | |
726 | ||
727 | if (S_ISDIR(nip->i_inode.i_mode)) { | |
728 | if (nip->i_entries < 2) { | |
729 | if (gfs2_consist_inode(nip)) | |
730 | gfs2_dinode_print(nip); | |
731 | error = -EIO; | |
732 | goto out_gunlock; | |
733 | } | |
734 | if (nip->i_entries > 2) { | |
735 | error = -ENOTEMPTY; | |
736 | goto out_gunlock; | |
737 | } | |
738 | } | |
739 | } else { | |
740 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); | |
741 | if (error) | |
742 | goto out_gunlock; | |
743 | ||
744 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); | |
745 | switch (error) { | |
746 | case -ENOENT: | |
747 | error = 0; | |
748 | break; | |
749 | case 0: | |
750 | error = -EEXIST; | |
751 | default: | |
752 | goto out_gunlock; | |
753 | }; | |
754 | ||
755 | if (odip != ndip) { | |
756 | if (!ndip->i_inode.i_nlink) { | |
757 | error = -EINVAL; | |
758 | goto out_gunlock; | |
759 | } | |
760 | if (ndip->i_entries == (u32)-1) { | |
761 | error = -EFBIG; | |
762 | goto out_gunlock; | |
763 | } | |
764 | if (S_ISDIR(ip->i_inode.i_mode) && | |
765 | ndip->i_inode.i_nlink == (u32)-1) { | |
766 | error = -EMLINK; | |
767 | goto out_gunlock; | |
768 | } | |
769 | } | |
770 | } | |
771 | ||
772 | /* Check out the dir to be renamed */ | |
773 | ||
774 | if (dir_rename) { | |
775 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); | |
776 | if (error) | |
777 | goto out_gunlock; | |
778 | } | |
779 | ||
780 | alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); | |
781 | if (error < 0) | |
782 | goto out_gunlock; | |
783 | error = 0; | |
784 | ||
785 | if (alloc_required) { | |
786 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
787 | if (!al) { | |
788 | error = -ENOMEM; | |
789 | goto out_gunlock; | |
790 | } | |
791 | ||
792 | error = gfs2_quota_lock_check(ndip); | |
793 | if (error) | |
794 | goto out_alloc; | |
795 | ||
796 | al->al_requested = sdp->sd_max_dirres; | |
797 | ||
798 | error = gfs2_inplace_reserve(ndip); | |
799 | if (error) | |
800 | goto out_gunlock_q; | |
801 | ||
802 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + | |
803 | al->al_rgd->rd_length + | |
804 | 4 * RES_DINODE + 4 * RES_LEAF + | |
805 | RES_STATFS + RES_QUOTA + 4, 0); | |
806 | if (error) | |
807 | goto out_ipreserv; | |
808 | } else { | |
809 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
810 | 5 * RES_LEAF + 4, 0); | |
811 | if (error) | |
812 | goto out_gunlock; | |
813 | } | |
814 | ||
815 | /* Remove the target file, if it exists */ | |
816 | ||
817 | if (nip) { | |
818 | if (S_ISDIR(nip->i_inode.i_mode)) | |
819 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); | |
820 | else { | |
821 | error = gfs2_dir_del(ndip, &ndentry->d_name); | |
822 | if (error) | |
823 | goto out_end_trans; | |
824 | error = gfs2_change_nlink(nip, -1); | |
825 | } | |
826 | if (error) | |
827 | goto out_end_trans; | |
828 | } | |
829 | ||
830 | if (dir_rename) { | |
831 | struct qstr name; | |
832 | gfs2_str2qstr(&name, ".."); | |
833 | ||
834 | error = gfs2_change_nlink(ndip, +1); | |
835 | if (error) | |
836 | goto out_end_trans; | |
837 | error = gfs2_change_nlink(odip, -1); | |
838 | if (error) | |
839 | goto out_end_trans; | |
840 | ||
841 | error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR); | |
842 | if (error) | |
843 | goto out_end_trans; | |
844 | } else { | |
845 | struct buffer_head *dibh; | |
846 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
847 | if (error) | |
848 | goto out_end_trans; | |
849 | ip->i_inode.i_ctime = CURRENT_TIME; | |
850 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
851 | gfs2_dinode_out(ip, dibh->b_data); | |
852 | brelse(dibh); | |
853 | } | |
854 | ||
855 | error = gfs2_dir_del(odip, &odentry->d_name); | |
856 | if (error) | |
857 | goto out_end_trans; | |
858 | ||
859 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode)); | |
860 | if (error) | |
861 | goto out_end_trans; | |
862 | ||
863 | out_end_trans: | |
864 | gfs2_trans_end(sdp); | |
865 | out_ipreserv: | |
866 | if (alloc_required) | |
867 | gfs2_inplace_release(ndip); | |
868 | out_gunlock_q: | |
869 | if (alloc_required) | |
870 | gfs2_quota_unlock(ndip); | |
871 | out_alloc: | |
872 | if (alloc_required) | |
873 | gfs2_alloc_put(ndip); | |
874 | out_gunlock: | |
875 | while (x--) { | |
876 | gfs2_glock_dq(ghs + x); | |
877 | gfs2_holder_uninit(ghs + x); | |
878 | } | |
879 | out_gunlock_r: | |
880 | if (r_gh.gh_gl) | |
881 | gfs2_glock_dq_uninit(&r_gh); | |
882 | out: | |
883 | return error; | |
884 | } | |
885 | ||
886 | /** | |
887 | * gfs2_readlink - Read the value of a symlink | |
888 | * @dentry: the symlink | |
889 | * @buf: the buffer to read the symlink data into | |
890 | * @size: the size of the buffer | |
891 | * | |
892 | * Returns: errno | |
893 | */ | |
894 | ||
895 | static int gfs2_readlink(struct dentry *dentry, char __user *user_buf, | |
896 | int user_size) | |
897 | { | |
898 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
899 | char array[GFS2_FAST_NAME_SIZE], *buf = array; | |
900 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
901 | int error; | |
902 | ||
903 | error = gfs2_readlinki(ip, &buf, &len); | |
904 | if (error) | |
905 | return error; | |
906 | ||
907 | if (user_size > len - 1) | |
908 | user_size = len - 1; | |
909 | ||
910 | if (copy_to_user(user_buf, buf, user_size)) | |
911 | error = -EFAULT; | |
912 | else | |
913 | error = user_size; | |
914 | ||
915 | if (buf != array) | |
916 | kfree(buf); | |
917 | ||
918 | return error; | |
919 | } | |
920 | ||
921 | /** | |
922 | * gfs2_follow_link - Follow a symbolic link | |
923 | * @dentry: The dentry of the link | |
924 | * @nd: Data that we pass to vfs_follow_link() | |
925 | * | |
926 | * This can handle symlinks of any size. It is optimised for symlinks | |
927 | * under GFS2_FAST_NAME_SIZE. | |
928 | * | |
929 | * Returns: 0 on success or error code | |
930 | */ | |
931 | ||
932 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) | |
933 | { | |
934 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
935 | char array[GFS2_FAST_NAME_SIZE], *buf = array; | |
936 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
937 | int error; | |
938 | ||
939 | error = gfs2_readlinki(ip, &buf, &len); | |
940 | if (!error) { | |
941 | error = vfs_follow_link(nd, buf); | |
942 | if (buf != array) | |
943 | kfree(buf); | |
944 | } | |
945 | ||
946 | return ERR_PTR(error); | |
947 | } | |
948 | ||
949 | /** | |
950 | * gfs2_permission - | |
951 | * @inode: | |
952 | * @mask: | |
953 | * @nd: passed from Linux VFS, ignored by us | |
954 | * | |
955 | * This may be called from the VFS directly, or from within GFS2 with the | |
956 | * inode locked, so we look to see if the glock is already locked and only | |
957 | * lock the glock if its not already been done. | |
958 | * | |
959 | * Returns: errno | |
960 | */ | |
961 | ||
962 | int gfs2_permission(struct inode *inode, int mask) | |
963 | { | |
964 | struct gfs2_inode *ip = GFS2_I(inode); | |
965 | struct gfs2_holder i_gh; | |
966 | int error; | |
967 | int unlock = 0; | |
968 | ||
969 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { | |
970 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
971 | if (error) | |
972 | return error; | |
973 | unlock = 1; | |
974 | } | |
975 | ||
976 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) | |
977 | error = -EACCES; | |
978 | else | |
979 | error = generic_permission(inode, mask, gfs2_check_acl); | |
980 | if (unlock) | |
981 | gfs2_glock_dq_uninit(&i_gh); | |
982 | ||
983 | return error; | |
984 | } | |
985 | ||
986 | static int setattr_size(struct inode *inode, struct iattr *attr) | |
987 | { | |
988 | struct gfs2_inode *ip = GFS2_I(inode); | |
989 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
990 | int error; | |
991 | ||
992 | if (attr->ia_size != ip->i_disksize) { | |
993 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); | |
994 | if (error) | |
995 | return error; | |
996 | error = vmtruncate(inode, attr->ia_size); | |
997 | gfs2_trans_end(sdp); | |
998 | if (error) | |
999 | return error; | |
1000 | } | |
1001 | ||
1002 | error = gfs2_truncatei(ip, attr->ia_size); | |
1003 | if (error && (inode->i_size != ip->i_disksize)) | |
1004 | i_size_write(inode, ip->i_disksize); | |
1005 | ||
1006 | return error; | |
1007 | } | |
1008 | ||
1009 | static int setattr_chown(struct inode *inode, struct iattr *attr) | |
1010 | { | |
1011 | struct gfs2_inode *ip = GFS2_I(inode); | |
1012 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
1013 | struct buffer_head *dibh; | |
1014 | u32 ouid, ogid, nuid, ngid; | |
1015 | int error; | |
1016 | ||
1017 | ouid = inode->i_uid; | |
1018 | ogid = inode->i_gid; | |
1019 | nuid = attr->ia_uid; | |
1020 | ngid = attr->ia_gid; | |
1021 | ||
1022 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
1023 | ouid = nuid = NO_QUOTA_CHANGE; | |
1024 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
1025 | ogid = ngid = NO_QUOTA_CHANGE; | |
1026 | ||
1027 | if (!gfs2_alloc_get(ip)) | |
1028 | return -ENOMEM; | |
1029 | ||
1030 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1031 | if (error) | |
1032 | goto out_alloc; | |
1033 | ||
1034 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
1035 | error = gfs2_quota_check(ip, nuid, ngid); | |
1036 | if (error) | |
1037 | goto out_gunlock_q; | |
1038 | } | |
1039 | ||
1040 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1041 | if (error) | |
1042 | goto out_gunlock_q; | |
1043 | ||
1044 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1045 | if (error) | |
1046 | goto out_end_trans; | |
1047 | ||
1048 | error = inode_setattr(inode, attr); | |
1049 | gfs2_assert_warn(sdp, !error); | |
1050 | ||
1051 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
1052 | gfs2_dinode_out(ip, dibh->b_data); | |
1053 | brelse(dibh); | |
1054 | ||
1055 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
1056 | u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); | |
1057 | gfs2_quota_change(ip, -blocks, ouid, ogid); | |
1058 | gfs2_quota_change(ip, blocks, nuid, ngid); | |
1059 | } | |
1060 | ||
1061 | out_end_trans: | |
1062 | gfs2_trans_end(sdp); | |
1063 | out_gunlock_q: | |
1064 | gfs2_quota_unlock(ip); | |
1065 | out_alloc: | |
1066 | gfs2_alloc_put(ip); | |
1067 | return error; | |
1068 | } | |
1069 | ||
1070 | /** | |
1071 | * gfs2_setattr - Change attributes on an inode | |
1072 | * @dentry: The dentry which is changing | |
1073 | * @attr: The structure describing the change | |
1074 | * | |
1075 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1076 | * that change out to disk. | |
1077 | * | |
1078 | * Returns: errno | |
1079 | */ | |
1080 | ||
1081 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1082 | { | |
1083 | struct inode *inode = dentry->d_inode; | |
1084 | struct gfs2_inode *ip = GFS2_I(inode); | |
1085 | struct gfs2_holder i_gh; | |
1086 | int error; | |
1087 | ||
1088 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1089 | if (error) | |
1090 | return error; | |
1091 | ||
1092 | error = -EPERM; | |
1093 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1094 | goto out; | |
1095 | ||
1096 | error = inode_change_ok(inode, attr); | |
1097 | if (error) | |
1098 | goto out; | |
1099 | ||
1100 | if (attr->ia_valid & ATTR_SIZE) | |
1101 | error = setattr_size(inode, attr); | |
1102 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) | |
1103 | error = setattr_chown(inode, attr); | |
1104 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1105 | error = gfs2_acl_chmod(ip, attr); | |
1106 | else | |
1107 | error = gfs2_setattr_simple(ip, attr); | |
1108 | ||
1109 | out: | |
1110 | gfs2_glock_dq_uninit(&i_gh); | |
1111 | if (!error) | |
1112 | mark_inode_dirty(inode); | |
1113 | return error; | |
1114 | } | |
1115 | ||
1116 | /** | |
1117 | * gfs2_getattr - Read out an inode's attributes | |
1118 | * @mnt: The vfsmount the inode is being accessed from | |
1119 | * @dentry: The dentry to stat | |
1120 | * @stat: The inode's stats | |
1121 | * | |
1122 | * This may be called from the VFS directly, or from within GFS2 with the | |
1123 | * inode locked, so we look to see if the glock is already locked and only | |
1124 | * lock the glock if its not already been done. Note that its the NFS | |
1125 | * readdirplus operation which causes this to be called (from filldir) | |
1126 | * with the glock already held. | |
1127 | * | |
1128 | * Returns: errno | |
1129 | */ | |
1130 | ||
1131 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1132 | struct kstat *stat) | |
1133 | { | |
1134 | struct inode *inode = dentry->d_inode; | |
1135 | struct gfs2_inode *ip = GFS2_I(inode); | |
1136 | struct gfs2_holder gh; | |
1137 | int error; | |
1138 | int unlock = 0; | |
1139 | ||
1140 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { | |
1141 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
1142 | if (error) | |
1143 | return error; | |
1144 | unlock = 1; | |
1145 | } | |
1146 | ||
1147 | generic_fillattr(inode, stat); | |
1148 | if (unlock) | |
1149 | gfs2_glock_dq_uninit(&gh); | |
1150 | ||
1151 | return 0; | |
1152 | } | |
1153 | ||
1154 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1155 | const void *data, size_t size, int flags) | |
1156 | { | |
1157 | struct inode *inode = dentry->d_inode; | |
1158 | struct gfs2_ea_request er; | |
1159 | ||
1160 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
1161 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1162 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1163 | return -EOPNOTSUPP; | |
1164 | er.er_data = (char *)data; | |
1165 | er.er_name_len = strlen(er.er_name); | |
1166 | er.er_data_len = size; | |
1167 | er.er_flags = flags; | |
1168 | ||
1169 | gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE)); | |
1170 | ||
1171 | return gfs2_ea_set(GFS2_I(inode), &er); | |
1172 | } | |
1173 | ||
1174 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1175 | void *data, size_t size) | |
1176 | { | |
1177 | struct gfs2_ea_request er; | |
1178 | ||
1179 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
1180 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1181 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1182 | return -EOPNOTSUPP; | |
1183 | er.er_data = data; | |
1184 | er.er_name_len = strlen(er.er_name); | |
1185 | er.er_data_len = size; | |
1186 | ||
1187 | return gfs2_ea_get(GFS2_I(dentry->d_inode), &er); | |
1188 | } | |
1189 | ||
1190 | static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) | |
1191 | { | |
1192 | struct gfs2_ea_request er; | |
1193 | ||
1194 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
1195 | er.er_data = (size) ? buffer : NULL; | |
1196 | er.er_data_len = size; | |
1197 | ||
1198 | return gfs2_ea_list(GFS2_I(dentry->d_inode), &er); | |
1199 | } | |
1200 | ||
1201 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1202 | { | |
1203 | struct gfs2_ea_request er; | |
1204 | ||
1205 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
1206 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1207 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1208 | return -EOPNOTSUPP; | |
1209 | er.er_name_len = strlen(er.er_name); | |
1210 | ||
1211 | return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er); | |
1212 | } | |
1213 | ||
1214 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, | |
1215 | u64 start, u64 len) | |
1216 | { | |
1217 | struct gfs2_inode *ip = GFS2_I(inode); | |
1218 | struct gfs2_holder gh; | |
1219 | int ret; | |
1220 | ||
1221 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1222 | if (ret) | |
1223 | return ret; | |
1224 | ||
1225 | mutex_lock(&inode->i_mutex); | |
1226 | ||
1227 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
1228 | if (ret) | |
1229 | goto out; | |
1230 | ||
1231 | if (gfs2_is_stuffed(ip)) { | |
1232 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
1233 | u64 size = i_size_read(inode); | |
1234 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
1235 | FIEMAP_EXTENT_DATA_INLINE; | |
1236 | phys += sizeof(struct gfs2_dinode); | |
1237 | phys += start; | |
1238 | if (start + len > size) | |
1239 | len = size - start; | |
1240 | if (start < size) | |
1241 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
1242 | len, flags); | |
1243 | if (ret == 1) | |
1244 | ret = 0; | |
1245 | } else { | |
1246 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
1247 | gfs2_block_map); | |
1248 | } | |
1249 | ||
1250 | gfs2_glock_dq_uninit(&gh); | |
1251 | out: | |
1252 | mutex_unlock(&inode->i_mutex); | |
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | const struct inode_operations gfs2_file_iops = { | |
1257 | .permission = gfs2_permission, | |
1258 | .setattr = gfs2_setattr, | |
1259 | .getattr = gfs2_getattr, | |
1260 | .setxattr = gfs2_setxattr, | |
1261 | .getxattr = gfs2_getxattr, | |
1262 | .listxattr = gfs2_listxattr, | |
1263 | .removexattr = gfs2_removexattr, | |
1264 | .fiemap = gfs2_fiemap, | |
1265 | }; | |
1266 | ||
1267 | const struct inode_operations gfs2_dir_iops = { | |
1268 | .create = gfs2_create, | |
1269 | .lookup = gfs2_lookup, | |
1270 | .link = gfs2_link, | |
1271 | .unlink = gfs2_unlink, | |
1272 | .symlink = gfs2_symlink, | |
1273 | .mkdir = gfs2_mkdir, | |
1274 | .rmdir = gfs2_rmdir, | |
1275 | .mknod = gfs2_mknod, | |
1276 | .rename = gfs2_rename, | |
1277 | .permission = gfs2_permission, | |
1278 | .setattr = gfs2_setattr, | |
1279 | .getattr = gfs2_getattr, | |
1280 | .setxattr = gfs2_setxattr, | |
1281 | .getxattr = gfs2_getxattr, | |
1282 | .listxattr = gfs2_listxattr, | |
1283 | .removexattr = gfs2_removexattr, | |
1284 | .fiemap = gfs2_fiemap, | |
1285 | }; | |
1286 | ||
1287 | const struct inode_operations gfs2_symlink_iops = { | |
1288 | .readlink = gfs2_readlink, | |
1289 | .follow_link = gfs2_follow_link, | |
1290 | .permission = gfs2_permission, | |
1291 | .setattr = gfs2_setattr, | |
1292 | .getattr = gfs2_getattr, | |
1293 | .setxattr = gfs2_setxattr, | |
1294 | .getxattr = gfs2_getxattr, | |
1295 | .listxattr = gfs2_listxattr, | |
1296 | .removexattr = gfs2_removexattr, | |
1297 | .fiemap = gfs2_fiemap, | |
1298 | }; | |
1299 |