Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
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 | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/namei.h> | |
16 | #include <linux/utsname.h> | |
17 | #include <linux/mm.h> | |
18 | #include <linux/xattr.h> | |
19 | #include <linux/posix_acl.h> | |
5c676f6d | 20 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 21 | #include <linux/crc32.h> |
7d308590 | 22 | #include <linux/lm_interface.h> |
b3b94faa DT |
23 | #include <asm/uaccess.h> |
24 | ||
25 | #include "gfs2.h" | |
5c676f6d | 26 | #include "incore.h" |
b3b94faa DT |
27 | #include "acl.h" |
28 | #include "bmap.h" | |
29 | #include "dir.h" | |
30 | #include "eaops.h" | |
31 | #include "eattr.h" | |
32 | #include "glock.h" | |
33 | #include "inode.h" | |
34 | #include "meta_io.h" | |
35 | #include "ops_dentry.h" | |
36 | #include "ops_inode.h" | |
b3b94faa DT |
37 | #include "quota.h" |
38 | #include "rgrp.h" | |
39 | #include "trans.h" | |
5c676f6d | 40 | #include "util.h" |
b3b94faa DT |
41 | |
42 | /** | |
43 | * gfs2_create - Create a file | |
44 | * @dir: The directory in which to create the file | |
45 | * @dentry: The dentry of the new file | |
46 | * @mode: The mode of the new file | |
47 | * | |
48 | * Returns: errno | |
49 | */ | |
50 | ||
51 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
52 | int mode, struct nameidata *nd) | |
53 | { | |
feaa7bba SW |
54 | struct gfs2_inode *dip = GFS2_I(dir); |
55 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
56 | struct gfs2_holder ghs[2]; |
57 | struct inode *inode; | |
b3b94faa | 58 | |
b3b94faa DT |
59 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
60 | ||
61 | for (;;) { | |
e7f14f4d | 62 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0); |
7359a19c | 63 | if (!IS_ERR(inode)) { |
b3b94faa DT |
64 | gfs2_trans_end(sdp); |
65 | if (dip->i_alloc.al_rgd) | |
66 | gfs2_inplace_release(dip); | |
67 | gfs2_quota_unlock(dip); | |
68 | gfs2_alloc_put(dip); | |
69 | gfs2_glock_dq_uninit_m(2, ghs); | |
3a8476dd | 70 | mark_inode_dirty(inode); |
b3b94faa | 71 | break; |
7359a19c | 72 | } else if (PTR_ERR(inode) != -EEXIST || |
b3b94faa DT |
73 | (nd->intent.open.flags & O_EXCL)) { |
74 | gfs2_holder_uninit(ghs); | |
7359a19c | 75 | return PTR_ERR(inode); |
b3b94faa DT |
76 | } |
77 | ||
c752666c SW |
78 | inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); |
79 | if (inode) { | |
80 | if (!IS_ERR(inode)) { | |
c752666c SW |
81 | gfs2_holder_uninit(ghs); |
82 | break; | |
83 | } else { | |
84 | gfs2_holder_uninit(ghs); | |
85 | return PTR_ERR(inode); | |
86 | } | |
b3b94faa DT |
87 | } |
88 | } | |
89 | ||
b3b94faa | 90 | d_instantiate(dentry, inode); |
b3b94faa DT |
91 | |
92 | return 0; | |
93 | } | |
94 | ||
95 | /** | |
96 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
97 | * @dir: The directory inode | |
98 | * @dentry: The dentry of the new inode | |
99 | * @nd: passed from Linux VFS, ignored by us | |
100 | * | |
101 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
102 | * | |
103 | * Returns: errno | |
104 | */ | |
105 | ||
106 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
107 | struct nameidata *nd) | |
108 | { | |
b3b94faa | 109 | struct inode *inode = NULL; |
b3b94faa | 110 | |
c752666c | 111 | dentry->d_op = &gfs2_dops; |
b3b94faa | 112 | |
c752666c SW |
113 | inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); |
114 | if (inode && IS_ERR(inode)) | |
115 | return ERR_PTR(PTR_ERR(inode)); | |
b3b94faa DT |
116 | |
117 | if (inode) | |
118 | return d_splice_alias(inode, dentry); | |
119 | d_add(dentry, inode); | |
120 | ||
121 | return NULL; | |
122 | } | |
123 | ||
124 | /** | |
125 | * gfs2_link - Link to a file | |
126 | * @old_dentry: The inode to link | |
127 | * @dir: Add link to this directory | |
128 | * @dentry: The name of the link | |
129 | * | |
130 | * Link the inode in "old_dentry" into the directory "dir" with the | |
131 | * name in "dentry". | |
132 | * | |
133 | * Returns: errno | |
134 | */ | |
135 | ||
136 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
137 | struct dentry *dentry) | |
138 | { | |
feaa7bba SW |
139 | struct gfs2_inode *dip = GFS2_I(dir); |
140 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa | 141 | struct inode *inode = old_dentry->d_inode; |
feaa7bba | 142 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
143 | struct gfs2_holder ghs[2]; |
144 | int alloc_required; | |
145 | int error; | |
146 | ||
b60623c2 | 147 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
148 | return -EPERM; |
149 | ||
150 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
151 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
152 | ||
153 | error = gfs2_glock_nq_m(2, ghs); | |
154 | if (error) | |
155 | goto out; | |
156 | ||
faf450ef | 157 | error = permission(dir, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
158 | if (error) |
159 | goto out_gunlock; | |
160 | ||
c752666c | 161 | error = gfs2_dir_search(dir, &dentry->d_name, NULL, NULL); |
b3b94faa DT |
162 | switch (error) { |
163 | case -ENOENT: | |
164 | break; | |
165 | case 0: | |
166 | error = -EEXIST; | |
167 | default: | |
168 | goto out_gunlock; | |
169 | } | |
170 | ||
171 | error = -EINVAL; | |
4f56110a | 172 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
173 | goto out_gunlock; |
174 | error = -EFBIG; | |
cd915493 | 175 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa DT |
176 | goto out_gunlock; |
177 | error = -EPERM; | |
178 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
179 | goto out_gunlock; | |
180 | error = -EINVAL; | |
4f56110a | 181 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
182 | goto out_gunlock; |
183 | error = -EMLINK; | |
4f56110a | 184 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
185 | goto out_gunlock; |
186 | ||
c752666c SW |
187 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); |
188 | if (error < 0) | |
b3b94faa | 189 | goto out_gunlock; |
c752666c | 190 | error = 0; |
b3b94faa DT |
191 | |
192 | if (alloc_required) { | |
193 | struct gfs2_alloc *al = gfs2_alloc_get(dip); | |
194 | ||
195 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
196 | if (error) | |
197 | goto out_alloc; | |
198 | ||
2933f925 | 199 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
200 | if (error) |
201 | goto out_gunlock_q; | |
202 | ||
203 | al->al_requested = sdp->sd_max_dirres; | |
204 | ||
205 | error = gfs2_inplace_reserve(dip); | |
206 | if (error) | |
207 | goto out_gunlock_q; | |
208 | ||
1b50259b | 209 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
b3b94faa DT |
210 | al->al_rgd->rd_ri.ri_length + |
211 | 2 * RES_DINODE + RES_STATFS + | |
212 | RES_QUOTA, 0); | |
213 | if (error) | |
214 | goto out_ipres; | |
215 | } else { | |
216 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
217 | if (error) | |
218 | goto out_ipres; | |
219 | } | |
220 | ||
c752666c | 221 | error = gfs2_dir_add(dir, &dentry->d_name, &ip->i_num, |
b60623c2 | 222 | IF2DT(inode->i_mode)); |
b3b94faa DT |
223 | if (error) |
224 | goto out_end_trans; | |
225 | ||
226 | error = gfs2_change_nlink(ip, +1); | |
227 | ||
feaa7bba | 228 | out_end_trans: |
b3b94faa | 229 | gfs2_trans_end(sdp); |
feaa7bba | 230 | out_ipres: |
b3b94faa DT |
231 | if (alloc_required) |
232 | gfs2_inplace_release(dip); | |
feaa7bba | 233 | out_gunlock_q: |
b3b94faa DT |
234 | if (alloc_required) |
235 | gfs2_quota_unlock(dip); | |
feaa7bba | 236 | out_alloc: |
b3b94faa DT |
237 | if (alloc_required) |
238 | gfs2_alloc_put(dip); | |
feaa7bba | 239 | out_gunlock: |
b3b94faa | 240 | gfs2_glock_dq_m(2, ghs); |
feaa7bba | 241 | out: |
b3b94faa DT |
242 | gfs2_holder_uninit(ghs); |
243 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa | 244 | if (!error) { |
29937ac6 | 245 | atomic_inc(&inode->i_count); |
b3b94faa DT |
246 | d_instantiate(dentry, inode); |
247 | mark_inode_dirty(inode); | |
248 | } | |
b3b94faa DT |
249 | return error; |
250 | } | |
251 | ||
252 | /** | |
253 | * gfs2_unlink - Unlink a file | |
254 | * @dir: The inode of the directory containing the file to unlink | |
255 | * @dentry: The file itself | |
256 | * | |
257 | * Unlink a file. Call gfs2_unlinki() | |
258 | * | |
259 | * Returns: errno | |
260 | */ | |
261 | ||
262 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
263 | { | |
feaa7bba SW |
264 | struct gfs2_inode *dip = GFS2_I(dir); |
265 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
266 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
b3b94faa DT |
267 | struct gfs2_holder ghs[2]; |
268 | int error; | |
269 | ||
b3b94faa DT |
270 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
271 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
272 | ||
273 | error = gfs2_glock_nq_m(2, ghs); | |
274 | if (error) | |
275 | goto out; | |
276 | ||
277 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
278 | if (error) | |
279 | goto out_gunlock; | |
280 | ||
feaa7bba | 281 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
282 | if (error) |
283 | goto out_gunlock; | |
284 | ||
feaa7bba SW |
285 | error = gfs2_dir_del(dip, &dentry->d_name); |
286 | if (error) | |
287 | goto out_end_trans; | |
b3b94faa | 288 | |
feaa7bba | 289 | error = gfs2_change_nlink(ip, -1); |
b3b94faa | 290 | |
feaa7bba SW |
291 | out_end_trans: |
292 | gfs2_trans_end(sdp); | |
293 | out_gunlock: | |
b3b94faa | 294 | gfs2_glock_dq_m(2, ghs); |
feaa7bba | 295 | out: |
b3b94faa DT |
296 | gfs2_holder_uninit(ghs); |
297 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
298 | return error; |
299 | } | |
300 | ||
301 | /** | |
302 | * gfs2_symlink - Create a symlink | |
303 | * @dir: The directory to create the symlink in | |
304 | * @dentry: The dentry to put the symlink in | |
305 | * @symname: The thing which the link points to | |
306 | * | |
307 | * Returns: errno | |
308 | */ | |
309 | ||
310 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
311 | const char *symname) | |
312 | { | |
feaa7bba SW |
313 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
314 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
315 | struct gfs2_holder ghs[2]; |
316 | struct inode *inode; | |
317 | struct buffer_head *dibh; | |
318 | int size; | |
319 | int error; | |
320 | ||
b3b94faa DT |
321 | /* Must be stuffed with a null terminator for gfs2_follow_link() */ |
322 | size = strlen(symname); | |
323 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
324 | return -ENAMETOOLONG; | |
325 | ||
326 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
327 | ||
e7f14f4d | 328 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0); |
7359a19c | 329 | if (IS_ERR(inode)) { |
b3b94faa | 330 | gfs2_holder_uninit(ghs); |
7359a19c | 331 | return PTR_ERR(inode); |
b3b94faa DT |
332 | } |
333 | ||
5c676f6d | 334 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa DT |
335 | |
336 | ip->i_di.di_size = size; | |
337 | ||
338 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
339 | ||
340 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
539e5d6b | 341 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
342 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, |
343 | size); | |
344 | brelse(dibh); | |
345 | } | |
346 | ||
347 | gfs2_trans_end(sdp); | |
348 | if (dip->i_alloc.al_rgd) | |
349 | gfs2_inplace_release(dip); | |
350 | gfs2_quota_unlock(dip); | |
351 | gfs2_alloc_put(dip); | |
352 | ||
353 | gfs2_glock_dq_uninit_m(2, ghs); | |
354 | ||
b3b94faa DT |
355 | d_instantiate(dentry, inode); |
356 | mark_inode_dirty(inode); | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | /** | |
362 | * gfs2_mkdir - Make a directory | |
363 | * @dir: The parent directory of the new one | |
364 | * @dentry: The dentry of the new directory | |
365 | * @mode: The mode of the new directory | |
366 | * | |
367 | * Returns: errno | |
368 | */ | |
369 | ||
370 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
371 | { | |
feaa7bba SW |
372 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
373 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
374 | struct gfs2_holder ghs[2]; |
375 | struct inode *inode; | |
376 | struct buffer_head *dibh; | |
377 | int error; | |
378 | ||
b3b94faa DT |
379 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
380 | ||
e7f14f4d | 381 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0); |
7359a19c | 382 | if (IS_ERR(inode)) { |
b3b94faa | 383 | gfs2_holder_uninit(ghs); |
7359a19c | 384 | return PTR_ERR(inode); |
b3b94faa DT |
385 | } |
386 | ||
5c676f6d | 387 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa | 388 | |
4f56110a | 389 | ip->i_inode.i_nlink = 2; |
b3b94faa DT |
390 | ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); |
391 | ip->i_di.di_flags |= GFS2_DIF_JDATA; | |
b3b94faa DT |
392 | ip->i_di.di_entries = 2; |
393 | ||
394 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
395 | ||
396 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
397 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
c752666c | 398 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); |
71b86f56 | 399 | struct qstr str; |
b3b94faa | 400 | |
71b86f56 | 401 | gfs2_str2qstr(&str, "."); |
c752666c SW |
402 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
403 | gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent); | |
b3b94faa | 404 | dent->de_inum = di->di_num; /* already GFS2 endian */ |
7ecdb70a | 405 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa DT |
406 | di->di_entries = cpu_to_be32(1); |
407 | ||
71b86f56 | 408 | gfs2_str2qstr(&str, ".."); |
c752666c SW |
409 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); |
410 | gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
b3b94faa | 411 | |
409e185d | 412 | gfs2_inum_out(&dip->i_num, &dent->de_inum); |
7ecdb70a | 413 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa | 414 | |
539e5d6b | 415 | gfs2_dinode_out(ip, di); |
b3b94faa DT |
416 | |
417 | brelse(dibh); | |
418 | } | |
419 | ||
420 | error = gfs2_change_nlink(dip, +1); | |
421 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ | |
422 | ||
423 | gfs2_trans_end(sdp); | |
424 | if (dip->i_alloc.al_rgd) | |
425 | gfs2_inplace_release(dip); | |
426 | gfs2_quota_unlock(dip); | |
427 | gfs2_alloc_put(dip); | |
428 | ||
429 | gfs2_glock_dq_uninit_m(2, ghs); | |
430 | ||
b3b94faa DT |
431 | d_instantiate(dentry, inode); |
432 | mark_inode_dirty(inode); | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
437 | /** | |
438 | * gfs2_rmdir - Remove a directory | |
439 | * @dir: The parent directory of the directory to be removed | |
440 | * @dentry: The dentry of the directory to remove | |
441 | * | |
442 | * Remove a directory. Call gfs2_rmdiri() | |
443 | * | |
444 | * Returns: errno | |
445 | */ | |
446 | ||
447 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) | |
448 | { | |
feaa7bba SW |
449 | struct gfs2_inode *dip = GFS2_I(dir); |
450 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
451 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
b3b94faa DT |
452 | struct gfs2_holder ghs[2]; |
453 | int error; | |
454 | ||
b3b94faa DT |
455 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
456 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
457 | ||
458 | error = gfs2_glock_nq_m(2, ghs); | |
459 | if (error) | |
460 | goto out; | |
461 | ||
462 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
463 | if (error) | |
464 | goto out_gunlock; | |
465 | ||
466 | if (ip->i_di.di_entries < 2) { | |
467 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 468 | gfs2_dinode_print(ip); |
b3b94faa DT |
469 | error = -EIO; |
470 | goto out_gunlock; | |
471 | } | |
472 | if (ip->i_di.di_entries > 2) { | |
473 | error = -ENOTEMPTY; | |
474 | goto out_gunlock; | |
475 | } | |
476 | ||
feaa7bba | 477 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
478 | if (error) |
479 | goto out_gunlock; | |
480 | ||
feaa7bba | 481 | error = gfs2_rmdiri(dip, &dentry->d_name, ip); |
b3b94faa DT |
482 | |
483 | gfs2_trans_end(sdp); | |
484 | ||
a91ea69f | 485 | out_gunlock: |
b3b94faa | 486 | gfs2_glock_dq_m(2, ghs); |
a91ea69f | 487 | out: |
b3b94faa DT |
488 | gfs2_holder_uninit(ghs); |
489 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
490 | return error; |
491 | } | |
492 | ||
493 | /** | |
494 | * gfs2_mknod - Make a special file | |
495 | * @dir: The directory in which the special file will reside | |
496 | * @dentry: The dentry of the special file | |
497 | * @mode: The mode of the special file | |
498 | * @rdev: The device specification of the special file | |
499 | * | |
500 | */ | |
501 | ||
502 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
503 | dev_t dev) | |
504 | { | |
e7f14f4d | 505 | struct gfs2_inode *dip = GFS2_I(dir); |
feaa7bba | 506 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
b3b94faa DT |
507 | struct gfs2_holder ghs[2]; |
508 | struct inode *inode; | |
b3b94faa DT |
509 | |
510 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
511 | ||
e7f14f4d | 512 | inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); |
7359a19c | 513 | if (IS_ERR(inode)) { |
b3b94faa | 514 | gfs2_holder_uninit(ghs); |
7359a19c | 515 | return PTR_ERR(inode); |
b3b94faa DT |
516 | } |
517 | ||
b3b94faa DT |
518 | gfs2_trans_end(sdp); |
519 | if (dip->i_alloc.al_rgd) | |
520 | gfs2_inplace_release(dip); | |
521 | gfs2_quota_unlock(dip); | |
522 | gfs2_alloc_put(dip); | |
523 | ||
524 | gfs2_glock_dq_uninit_m(2, ghs); | |
525 | ||
b3b94faa DT |
526 | d_instantiate(dentry, inode); |
527 | mark_inode_dirty(inode); | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | /** | |
533 | * gfs2_rename - Rename a file | |
534 | * @odir: Parent directory of old file name | |
535 | * @odentry: The old dentry of the file | |
536 | * @ndir: Parent directory of new file name | |
537 | * @ndentry: The new dentry of the file | |
538 | * | |
539 | * Returns: errno | |
540 | */ | |
541 | ||
542 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
543 | struct inode *ndir, struct dentry *ndentry) | |
544 | { | |
feaa7bba SW |
545 | struct gfs2_inode *odip = GFS2_I(odir); |
546 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
547 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 548 | struct gfs2_inode *nip = NULL; |
feaa7bba | 549 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
b3b94faa DT |
550 | struct gfs2_holder ghs[4], r_gh; |
551 | unsigned int num_gh; | |
552 | int dir_rename = 0; | |
553 | int alloc_required; | |
554 | unsigned int x; | |
555 | int error; | |
556 | ||
b3b94faa | 557 | if (ndentry->d_inode) { |
feaa7bba | 558 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
559 | if (ip == nip) |
560 | return 0; | |
561 | } | |
562 | ||
b3b94faa DT |
563 | /* Make sure we aren't trying to move a dirctory into it's subdir */ |
564 | ||
b60623c2 | 565 | if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) { |
b3b94faa DT |
566 | dir_rename = 1; |
567 | ||
b60623c2 | 568 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
569 | &r_gh); |
570 | if (error) | |
571 | goto out; | |
572 | ||
573 | error = gfs2_ok_to_move(ip, ndip); | |
574 | if (error) | |
575 | goto out_gunlock_r; | |
576 | } | |
577 | ||
d9d1ca30 | 578 | num_gh = 1; |
b3b94faa | 579 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
580 | if (odip != ndip) { |
581 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
582 | num_gh++; | |
583 | } | |
584 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
585 | num_gh++; | |
b3b94faa | 586 | |
d9d1ca30 SW |
587 | if (nip) { |
588 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
589 | num_gh++; | |
590 | } | |
b3b94faa DT |
591 | |
592 | error = gfs2_glock_nq_m(num_gh, ghs); | |
593 | if (error) | |
594 | goto out_uninit; | |
595 | ||
596 | /* Check out the old directory */ | |
597 | ||
598 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
599 | if (error) | |
600 | goto out_gunlock; | |
601 | ||
602 | /* Check out the new directory */ | |
603 | ||
604 | if (nip) { | |
605 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
606 | if (error) | |
607 | goto out_gunlock; | |
608 | ||
b60623c2 | 609 | if (S_ISDIR(nip->i_inode.i_mode)) { |
b3b94faa DT |
610 | if (nip->i_di.di_entries < 2) { |
611 | if (gfs2_consist_inode(nip)) | |
4cc14f0b | 612 | gfs2_dinode_print(nip); |
b3b94faa DT |
613 | error = -EIO; |
614 | goto out_gunlock; | |
615 | } | |
616 | if (nip->i_di.di_entries > 2) { | |
617 | error = -ENOTEMPTY; | |
618 | goto out_gunlock; | |
619 | } | |
620 | } | |
621 | } else { | |
faf450ef | 622 | error = permission(ndir, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
623 | if (error) |
624 | goto out_gunlock; | |
625 | ||
c752666c | 626 | error = gfs2_dir_search(ndir, &ndentry->d_name, NULL, NULL); |
b3b94faa DT |
627 | switch (error) { |
628 | case -ENOENT: | |
629 | error = 0; | |
630 | break; | |
631 | case 0: | |
632 | error = -EEXIST; | |
633 | default: | |
634 | goto out_gunlock; | |
635 | }; | |
636 | ||
637 | if (odip != ndip) { | |
4f56110a | 638 | if (!ndip->i_inode.i_nlink) { |
b3b94faa DT |
639 | error = -EINVAL; |
640 | goto out_gunlock; | |
641 | } | |
cd915493 | 642 | if (ndip->i_di.di_entries == (u32)-1) { |
b3b94faa DT |
643 | error = -EFBIG; |
644 | goto out_gunlock; | |
645 | } | |
b60623c2 | 646 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 647 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
648 | error = -EMLINK; |
649 | goto out_gunlock; | |
650 | } | |
651 | } | |
652 | } | |
653 | ||
654 | /* Check out the dir to be renamed */ | |
655 | ||
656 | if (dir_rename) { | |
faf450ef | 657 | error = permission(odentry->d_inode, MAY_WRITE, NULL); |
b3b94faa DT |
658 | if (error) |
659 | goto out_gunlock; | |
660 | } | |
661 | ||
c752666c SW |
662 | alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); |
663 | if (error < 0) | |
b3b94faa | 664 | goto out_gunlock; |
c752666c | 665 | error = 0; |
b3b94faa DT |
666 | |
667 | if (alloc_required) { | |
668 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
669 | ||
670 | error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
671 | if (error) | |
672 | goto out_alloc; | |
673 | ||
2933f925 | 674 | error = gfs2_quota_check(ndip, ndip->i_inode.i_uid, ndip->i_inode.i_gid); |
b3b94faa DT |
675 | if (error) |
676 | goto out_gunlock_q; | |
677 | ||
678 | al->al_requested = sdp->sd_max_dirres; | |
679 | ||
680 | error = gfs2_inplace_reserve(ndip); | |
681 | if (error) | |
682 | goto out_gunlock_q; | |
683 | ||
fe1bdedc | 684 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
b3b94faa DT |
685 | al->al_rgd->rd_ri.ri_length + |
686 | 4 * RES_DINODE + 4 * RES_LEAF + | |
feaa7bba | 687 | RES_STATFS + RES_QUOTA, 0); |
b3b94faa DT |
688 | if (error) |
689 | goto out_ipreserv; | |
690 | } else { | |
691 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
feaa7bba | 692 | 5 * RES_LEAF, 0); |
b3b94faa DT |
693 | if (error) |
694 | goto out_gunlock; | |
695 | } | |
696 | ||
697 | /* Remove the target file, if it exists */ | |
698 | ||
699 | if (nip) { | |
b60623c2 | 700 | if (S_ISDIR(nip->i_inode.i_mode)) |
feaa7bba SW |
701 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); |
702 | else { | |
703 | error = gfs2_dir_del(ndip, &ndentry->d_name); | |
704 | if (error) | |
705 | goto out_end_trans; | |
706 | error = gfs2_change_nlink(nip, -1); | |
707 | } | |
b3b94faa DT |
708 | if (error) |
709 | goto out_end_trans; | |
710 | } | |
711 | ||
712 | if (dir_rename) { | |
713 | struct qstr name; | |
71b86f56 | 714 | gfs2_str2qstr(&name, ".."); |
b3b94faa DT |
715 | |
716 | error = gfs2_change_nlink(ndip, +1); | |
717 | if (error) | |
718 | goto out_end_trans; | |
719 | error = gfs2_change_nlink(odip, -1); | |
720 | if (error) | |
721 | goto out_end_trans; | |
722 | ||
723 | error = gfs2_dir_mvino(ip, &name, &ndip->i_num, DT_DIR); | |
724 | if (error) | |
725 | goto out_end_trans; | |
726 | } else { | |
727 | struct buffer_head *dibh; | |
728 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
729 | if (error) | |
730 | goto out_end_trans; | |
1a7b1eed | 731 | ip->i_inode.i_ctime.tv_sec = get_seconds(); |
d4e9c4c3 | 732 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 733 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
734 | brelse(dibh); |
735 | } | |
736 | ||
737 | error = gfs2_dir_del(odip, &odentry->d_name); | |
738 | if (error) | |
739 | goto out_end_trans; | |
740 | ||
c752666c | 741 | error = gfs2_dir_add(ndir, &ndentry->d_name, &ip->i_num, |
b60623c2 | 742 | IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
743 | if (error) |
744 | goto out_end_trans; | |
745 | ||
feaa7bba | 746 | out_end_trans: |
b3b94faa | 747 | gfs2_trans_end(sdp); |
feaa7bba | 748 | out_ipreserv: |
b3b94faa DT |
749 | if (alloc_required) |
750 | gfs2_inplace_release(ndip); | |
feaa7bba | 751 | out_gunlock_q: |
b3b94faa DT |
752 | if (alloc_required) |
753 | gfs2_quota_unlock(ndip); | |
feaa7bba | 754 | out_alloc: |
b3b94faa DT |
755 | if (alloc_required) |
756 | gfs2_alloc_put(ndip); | |
feaa7bba | 757 | out_gunlock: |
b3b94faa | 758 | gfs2_glock_dq_m(num_gh, ghs); |
feaa7bba | 759 | out_uninit: |
b3b94faa DT |
760 | for (x = 0; x < num_gh; x++) |
761 | gfs2_holder_uninit(ghs + x); | |
feaa7bba | 762 | out_gunlock_r: |
b3b94faa DT |
763 | if (dir_rename) |
764 | gfs2_glock_dq_uninit(&r_gh); | |
feaa7bba | 765 | out: |
b3b94faa DT |
766 | return error; |
767 | } | |
768 | ||
769 | /** | |
770 | * gfs2_readlink - Read the value of a symlink | |
771 | * @dentry: the symlink | |
772 | * @buf: the buffer to read the symlink data into | |
773 | * @size: the size of the buffer | |
774 | * | |
775 | * Returns: errno | |
776 | */ | |
777 | ||
778 | static int gfs2_readlink(struct dentry *dentry, char __user *user_buf, | |
779 | int user_size) | |
780 | { | |
feaa7bba | 781 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
782 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
783 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
784 | int error; | |
785 | ||
b3b94faa DT |
786 | error = gfs2_readlinki(ip, &buf, &len); |
787 | if (error) | |
788 | return error; | |
789 | ||
790 | if (user_size > len - 1) | |
791 | user_size = len - 1; | |
792 | ||
793 | if (copy_to_user(user_buf, buf, user_size)) | |
794 | error = -EFAULT; | |
795 | else | |
796 | error = user_size; | |
797 | ||
798 | if (buf != array) | |
799 | kfree(buf); | |
800 | ||
801 | return error; | |
802 | } | |
803 | ||
804 | /** | |
805 | * gfs2_follow_link - Follow a symbolic link | |
806 | * @dentry: The dentry of the link | |
807 | * @nd: Data that we pass to vfs_follow_link() | |
808 | * | |
809 | * This can handle symlinks of any size. It is optimised for symlinks | |
810 | * under GFS2_FAST_NAME_SIZE. | |
811 | * | |
812 | * Returns: 0 on success or error code | |
813 | */ | |
814 | ||
815 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) | |
816 | { | |
feaa7bba | 817 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
818 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
819 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
820 | int error; | |
821 | ||
b3b94faa DT |
822 | error = gfs2_readlinki(ip, &buf, &len); |
823 | if (!error) { | |
824 | error = vfs_follow_link(nd, buf); | |
825 | if (buf != array) | |
826 | kfree(buf); | |
827 | } | |
828 | ||
829 | return ERR_PTR(error); | |
830 | } | |
831 | ||
832 | /** | |
833 | * gfs2_permission - | |
834 | * @inode: | |
835 | * @mask: | |
836 | * @nd: passed from Linux VFS, ignored by us | |
837 | * | |
300c7d75 SW |
838 | * This may be called from the VFS directly, or from within GFS2 with the |
839 | * inode locked, so we look to see if the glock is already locked and only | |
840 | * lock the glock if its not already been done. | |
841 | * | |
b3b94faa DT |
842 | * Returns: errno |
843 | */ | |
844 | ||
845 | static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd) | |
846 | { | |
feaa7bba | 847 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
848 | struct gfs2_holder i_gh; |
849 | int error; | |
300c7d75 | 850 | int unlock = 0; |
b3b94faa | 851 | |
300c7d75 SW |
852 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) { |
853 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
854 | if (error) | |
855 | return error; | |
856 | unlock = 1; | |
857 | } | |
b3b94faa | 858 | |
300c7d75 SW |
859 | error = generic_permission(inode, mask, gfs2_check_acl_locked); |
860 | if (unlock) | |
b3b94faa | 861 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
862 | |
863 | return error; | |
864 | } | |
865 | ||
866 | static int setattr_size(struct inode *inode, struct iattr *attr) | |
867 | { | |
feaa7bba | 868 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
869 | int error; |
870 | ||
871 | if (attr->ia_size != ip->i_di.di_size) { | |
872 | error = vmtruncate(inode, attr->ia_size); | |
873 | if (error) | |
874 | return error; | |
875 | } | |
876 | ||
aa6a85a9 | 877 | error = gfs2_truncatei(ip, attr->ia_size); |
b3b94faa DT |
878 | if (error) |
879 | return error; | |
880 | ||
881 | return error; | |
882 | } | |
883 | ||
884 | static int setattr_chown(struct inode *inode, struct iattr *attr) | |
885 | { | |
feaa7bba SW |
886 | struct gfs2_inode *ip = GFS2_I(inode); |
887 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
b3b94faa | 888 | struct buffer_head *dibh; |
cd915493 | 889 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
890 | int error; |
891 | ||
2933f925 SW |
892 | ouid = inode->i_uid; |
893 | ogid = inode->i_gid; | |
b3b94faa DT |
894 | nuid = attr->ia_uid; |
895 | ngid = attr->ia_gid; | |
896 | ||
897 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
898 | ouid = nuid = NO_QUOTA_CHANGE; | |
899 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
900 | ogid = ngid = NO_QUOTA_CHANGE; | |
901 | ||
902 | gfs2_alloc_get(ip); | |
903 | ||
904 | error = gfs2_quota_lock(ip, nuid, ngid); | |
905 | if (error) | |
906 | goto out_alloc; | |
907 | ||
908 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
909 | error = gfs2_quota_check(ip, nuid, ngid); | |
910 | if (error) | |
911 | goto out_gunlock_q; | |
912 | } | |
913 | ||
914 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
915 | if (error) | |
916 | goto out_gunlock_q; | |
917 | ||
918 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
919 | if (error) | |
920 | goto out_end_trans; | |
921 | ||
922 | error = inode_setattr(inode, attr); | |
923 | gfs2_assert_warn(sdp, !error); | |
b3b94faa | 924 | |
d4e9c4c3 | 925 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 926 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
927 | brelse(dibh); |
928 | ||
929 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
af18ddb8 SW |
930 | gfs2_quota_change(ip, -ip->i_di.di_blocks, ouid, ogid); |
931 | gfs2_quota_change(ip, ip->i_di.di_blocks, nuid, ngid); | |
b3b94faa DT |
932 | } |
933 | ||
a91ea69f | 934 | out_end_trans: |
b3b94faa | 935 | gfs2_trans_end(sdp); |
a91ea69f | 936 | out_gunlock_q: |
b3b94faa | 937 | gfs2_quota_unlock(ip); |
a91ea69f | 938 | out_alloc: |
b3b94faa | 939 | gfs2_alloc_put(ip); |
b3b94faa DT |
940 | return error; |
941 | } | |
942 | ||
943 | /** | |
944 | * gfs2_setattr - Change attributes on an inode | |
945 | * @dentry: The dentry which is changing | |
946 | * @attr: The structure describing the change | |
947 | * | |
948 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
949 | * that change out to disk. | |
950 | * | |
951 | * Returns: errno | |
952 | */ | |
953 | ||
954 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
955 | { | |
956 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 957 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
958 | struct gfs2_holder i_gh; |
959 | int error; | |
960 | ||
b3b94faa DT |
961 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
962 | if (error) | |
963 | return error; | |
964 | ||
965 | error = -EPERM; | |
966 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
967 | goto out; | |
968 | ||
969 | error = inode_change_ok(inode, attr); | |
970 | if (error) | |
971 | goto out; | |
972 | ||
973 | if (attr->ia_valid & ATTR_SIZE) | |
974 | error = setattr_size(inode, attr); | |
975 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) | |
976 | error = setattr_chown(inode, attr); | |
977 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
978 | error = gfs2_acl_chmod(ip, attr); | |
979 | else | |
980 | error = gfs2_setattr_simple(ip, attr); | |
981 | ||
a91ea69f | 982 | out: |
b3b94faa | 983 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
984 | if (!error) |
985 | mark_inode_dirty(inode); | |
b3b94faa DT |
986 | return error; |
987 | } | |
988 | ||
989 | /** | |
990 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 991 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
992 | * @dentry: The dentry to stat |
993 | * @stat: The inode's stats | |
994 | * | |
995 | * Returns: errno | |
996 | */ | |
997 | ||
998 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
999 | struct kstat *stat) | |
1000 | { | |
1001 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1002 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1003 | struct gfs2_holder gh; |
1004 | int error; | |
1005 | ||
b3b94faa DT |
1006 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1007 | if (!error) { | |
1008 | generic_fillattr(inode, stat); | |
1009 | gfs2_glock_dq_uninit(&gh); | |
1010 | } | |
1011 | ||
1012 | return error; | |
1013 | } | |
1014 | ||
1015 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1016 | const void *data, size_t size, int flags) | |
1017 | { | |
feaa7bba | 1018 | struct inode *inode = dentry->d_inode; |
b3b94faa DT |
1019 | struct gfs2_ea_request er; |
1020 | ||
b3b94faa DT |
1021 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1022 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1023 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1024 | return -EOPNOTSUPP; | |
1025 | er.er_data = (char *)data; | |
1026 | er.er_name_len = strlen(er.er_name); | |
1027 | er.er_data_len = size; | |
1028 | er.er_flags = flags; | |
1029 | ||
feaa7bba | 1030 | gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE)); |
b3b94faa | 1031 | |
feaa7bba | 1032 | return gfs2_ea_set(GFS2_I(inode), &er); |
b3b94faa DT |
1033 | } |
1034 | ||
1035 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1036 | void *data, size_t size) | |
1037 | { | |
1038 | struct gfs2_ea_request er; | |
1039 | ||
b3b94faa DT |
1040 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1041 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1042 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1043 | return -EOPNOTSUPP; | |
1044 | er.er_data = data; | |
1045 | er.er_name_len = strlen(er.er_name); | |
1046 | er.er_data_len = size; | |
1047 | ||
feaa7bba | 1048 | return gfs2_ea_get(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1049 | } |
1050 | ||
1051 | static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) | |
1052 | { | |
1053 | struct gfs2_ea_request er; | |
1054 | ||
b3b94faa DT |
1055 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1056 | er.er_data = (size) ? buffer : NULL; | |
1057 | er.er_data_len = size; | |
1058 | ||
feaa7bba | 1059 | return gfs2_ea_list(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1060 | } |
1061 | ||
1062 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1063 | { | |
1064 | struct gfs2_ea_request er; | |
1065 | ||
b3b94faa DT |
1066 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1067 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1068 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1069 | return -EOPNOTSUPP; | |
1070 | er.er_name_len = strlen(er.er_name); | |
1071 | ||
feaa7bba | 1072 | return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1073 | } |
1074 | ||
1075 | struct inode_operations gfs2_file_iops = { | |
1076 | .permission = gfs2_permission, | |
1077 | .setattr = gfs2_setattr, | |
1078 | .getattr = gfs2_getattr, | |
1079 | .setxattr = gfs2_setxattr, | |
1080 | .getxattr = gfs2_getxattr, | |
1081 | .listxattr = gfs2_listxattr, | |
1082 | .removexattr = gfs2_removexattr, | |
1083 | }; | |
1084 | ||
1085 | struct inode_operations gfs2_dev_iops = { | |
1086 | .permission = gfs2_permission, | |
1087 | .setattr = gfs2_setattr, | |
1088 | .getattr = gfs2_getattr, | |
1089 | .setxattr = gfs2_setxattr, | |
1090 | .getxattr = gfs2_getxattr, | |
1091 | .listxattr = gfs2_listxattr, | |
1092 | .removexattr = gfs2_removexattr, | |
1093 | }; | |
1094 | ||
1095 | struct inode_operations gfs2_dir_iops = { | |
1096 | .create = gfs2_create, | |
1097 | .lookup = gfs2_lookup, | |
1098 | .link = gfs2_link, | |
1099 | .unlink = gfs2_unlink, | |
1100 | .symlink = gfs2_symlink, | |
1101 | .mkdir = gfs2_mkdir, | |
1102 | .rmdir = gfs2_rmdir, | |
1103 | .mknod = gfs2_mknod, | |
1104 | .rename = gfs2_rename, | |
1105 | .permission = gfs2_permission, | |
1106 | .setattr = gfs2_setattr, | |
1107 | .getattr = gfs2_getattr, | |
1108 | .setxattr = gfs2_setxattr, | |
1109 | .getxattr = gfs2_getxattr, | |
1110 | .listxattr = gfs2_listxattr, | |
1111 | .removexattr = gfs2_removexattr, | |
1112 | }; | |
1113 | ||
1114 | struct inode_operations gfs2_symlink_iops = { | |
1115 | .readlink = gfs2_readlink, | |
1116 | .follow_link = gfs2_follow_link, | |
1117 | .permission = gfs2_permission, | |
1118 | .setattr = gfs2_setattr, | |
1119 | .getattr = gfs2_getattr, | |
1120 | .setxattr = gfs2_setxattr, | |
1121 | .getxattr = gfs2_getxattr, | |
1122 | .listxattr = gfs2_listxattr, | |
1123 | .removexattr = gfs2_removexattr, | |
1124 | }; | |
1125 |