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Commit | Line | Data |
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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 | ||
b3b94faa DT |
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> | |
5c676f6d | 19 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 20 | #include <linux/crc32.h> |
7d308590 | 21 | #include <linux/lm_interface.h> |
b3b94faa DT |
22 | #include <asm/uaccess.h> |
23 | ||
24 | #include "gfs2.h" | |
5c676f6d | 25 | #include "incore.h" |
b3b94faa DT |
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 "ops_dentry.h" | |
35 | #include "ops_inode.h" | |
b3b94faa DT |
36 | #include "quota.h" |
37 | #include "rgrp.h" | |
38 | #include "trans.h" | |
5c676f6d | 39 | #include "util.h" |
b3b94faa DT |
40 | |
41 | /** | |
42 | * gfs2_create - Create a file | |
43 | * @dir: The directory in which to create the file | |
44 | * @dentry: The dentry of the new file | |
45 | * @mode: The mode of the new file | |
46 | * | |
47 | * Returns: errno | |
48 | */ | |
49 | ||
50 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
51 | int mode, struct nameidata *nd) | |
52 | { | |
feaa7bba SW |
53 | struct gfs2_inode *dip = GFS2_I(dir); |
54 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
55 | struct gfs2_holder ghs[2]; |
56 | struct inode *inode; | |
b3b94faa | 57 | |
b3b94faa DT |
58 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
59 | ||
60 | for (;;) { | |
e7f14f4d | 61 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0); |
7359a19c | 62 | if (!IS_ERR(inode)) { |
b3b94faa DT |
63 | gfs2_trans_end(sdp); |
64 | if (dip->i_alloc.al_rgd) | |
65 | gfs2_inplace_release(dip); | |
66 | gfs2_quota_unlock(dip); | |
67 | gfs2_alloc_put(dip); | |
68 | gfs2_glock_dq_uninit_m(2, ghs); | |
3a8476dd | 69 | mark_inode_dirty(inode); |
b3b94faa | 70 | break; |
7359a19c | 71 | } else if (PTR_ERR(inode) != -EEXIST || |
b3b94faa DT |
72 | (nd->intent.open.flags & O_EXCL)) { |
73 | gfs2_holder_uninit(ghs); | |
7359a19c | 74 | return PTR_ERR(inode); |
b3b94faa DT |
75 | } |
76 | ||
c752666c SW |
77 | inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); |
78 | if (inode) { | |
79 | if (!IS_ERR(inode)) { | |
c752666c SW |
80 | gfs2_holder_uninit(ghs); |
81 | break; | |
82 | } else { | |
83 | gfs2_holder_uninit(ghs); | |
84 | return PTR_ERR(inode); | |
85 | } | |
b3b94faa DT |
86 | } |
87 | } | |
88 | ||
b3b94faa | 89 | d_instantiate(dentry, inode); |
b3b94faa DT |
90 | |
91 | return 0; | |
92 | } | |
93 | ||
94 | /** | |
95 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
96 | * @dir: The directory inode | |
97 | * @dentry: The dentry of the new inode | |
98 | * @nd: passed from Linux VFS, ignored by us | |
99 | * | |
100 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
101 | * | |
102 | * Returns: errno | |
103 | */ | |
104 | ||
105 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
106 | struct nameidata *nd) | |
107 | { | |
b3b94faa | 108 | struct inode *inode = NULL; |
b3b94faa | 109 | |
c752666c | 110 | dentry->d_op = &gfs2_dops; |
b3b94faa | 111 | |
c752666c SW |
112 | inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); |
113 | if (inode && IS_ERR(inode)) | |
114 | return ERR_PTR(PTR_ERR(inode)); | |
b3b94faa DT |
115 | |
116 | if (inode) | |
117 | return d_splice_alias(inode, dentry); | |
118 | d_add(dentry, inode); | |
119 | ||
120 | return NULL; | |
121 | } | |
122 | ||
123 | /** | |
124 | * gfs2_link - Link to a file | |
125 | * @old_dentry: The inode to link | |
126 | * @dir: Add link to this directory | |
127 | * @dentry: The name of the link | |
128 | * | |
129 | * Link the inode in "old_dentry" into the directory "dir" with the | |
130 | * name in "dentry". | |
131 | * | |
132 | * Returns: errno | |
133 | */ | |
134 | ||
135 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
136 | struct dentry *dentry) | |
137 | { | |
feaa7bba SW |
138 | struct gfs2_inode *dip = GFS2_I(dir); |
139 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa | 140 | struct inode *inode = old_dentry->d_inode; |
feaa7bba | 141 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
142 | struct gfs2_holder ghs[2]; |
143 | int alloc_required; | |
144 | int error; | |
145 | ||
b60623c2 | 146 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
147 | return -EPERM; |
148 | ||
149 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
150 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
151 | ||
152 | error = gfs2_glock_nq_m(2, ghs); | |
153 | if (error) | |
154 | goto out; | |
155 | ||
faf450ef | 156 | error = permission(dir, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
157 | if (error) |
158 | goto out_gunlock; | |
159 | ||
dbb7cae2 | 160 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
161 | switch (error) { |
162 | case -ENOENT: | |
163 | break; | |
164 | case 0: | |
165 | error = -EEXIST; | |
166 | default: | |
167 | goto out_gunlock; | |
168 | } | |
169 | ||
170 | error = -EINVAL; | |
4f56110a | 171 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
172 | goto out_gunlock; |
173 | error = -EFBIG; | |
cd915493 | 174 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa DT |
175 | goto out_gunlock; |
176 | error = -EPERM; | |
177 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
178 | goto out_gunlock; | |
179 | error = -EINVAL; | |
4f56110a | 180 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
181 | goto out_gunlock; |
182 | error = -EMLINK; | |
4f56110a | 183 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
184 | goto out_gunlock; |
185 | ||
c752666c SW |
186 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); |
187 | if (error < 0) | |
b3b94faa | 188 | goto out_gunlock; |
c752666c | 189 | error = 0; |
b3b94faa DT |
190 | |
191 | if (alloc_required) { | |
192 | struct gfs2_alloc *al = gfs2_alloc_get(dip); | |
193 | ||
194 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
195 | if (error) | |
196 | goto out_alloc; | |
197 | ||
2933f925 | 198 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
199 | if (error) |
200 | goto out_gunlock_q; | |
201 | ||
202 | al->al_requested = sdp->sd_max_dirres; | |
203 | ||
204 | error = gfs2_inplace_reserve(dip); | |
205 | if (error) | |
206 | goto out_gunlock_q; | |
207 | ||
1b50259b | 208 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 209 | al->al_rgd->rd_length + |
b3b94faa DT |
210 | 2 * RES_DINODE + RES_STATFS + |
211 | RES_QUOTA, 0); | |
212 | if (error) | |
213 | goto out_ipres; | |
214 | } else { | |
215 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
216 | if (error) | |
217 | goto out_ipres; | |
218 | } | |
219 | ||
dbb7cae2 | 220 | error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode)); |
b3b94faa DT |
221 | if (error) |
222 | goto out_end_trans; | |
223 | ||
224 | error = gfs2_change_nlink(ip, +1); | |
225 | ||
feaa7bba | 226 | out_end_trans: |
b3b94faa | 227 | gfs2_trans_end(sdp); |
feaa7bba | 228 | out_ipres: |
b3b94faa DT |
229 | if (alloc_required) |
230 | gfs2_inplace_release(dip); | |
feaa7bba | 231 | out_gunlock_q: |
b3b94faa DT |
232 | if (alloc_required) |
233 | gfs2_quota_unlock(dip); | |
feaa7bba | 234 | out_alloc: |
b3b94faa DT |
235 | if (alloc_required) |
236 | gfs2_alloc_put(dip); | |
feaa7bba | 237 | out_gunlock: |
b3b94faa | 238 | gfs2_glock_dq_m(2, ghs); |
feaa7bba | 239 | out: |
b3b94faa DT |
240 | gfs2_holder_uninit(ghs); |
241 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa | 242 | if (!error) { |
29937ac6 | 243 | atomic_inc(&inode->i_count); |
b3b94faa DT |
244 | d_instantiate(dentry, inode); |
245 | mark_inode_dirty(inode); | |
246 | } | |
b3b94faa DT |
247 | return error; |
248 | } | |
249 | ||
250 | /** | |
251 | * gfs2_unlink - Unlink a file | |
252 | * @dir: The inode of the directory containing the file to unlink | |
253 | * @dentry: The file itself | |
254 | * | |
255 | * Unlink a file. Call gfs2_unlinki() | |
256 | * | |
257 | * Returns: errno | |
258 | */ | |
259 | ||
260 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
261 | { | |
feaa7bba SW |
262 | struct gfs2_inode *dip = GFS2_I(dir); |
263 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
264 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
265 | struct gfs2_holder ghs[3]; |
266 | struct gfs2_rgrpd *rgd; | |
267 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
268 | int error; |
269 | ||
ddee7608 RC |
270 | error = gfs2_rindex_hold(sdp, &ri_gh); |
271 | if (error) | |
272 | return error; | |
273 | ||
b3b94faa | 274 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 275 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 276 | |
dbb7cae2 | 277 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
278 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
279 | ||
280 | ||
281 | error = gfs2_glock_nq_m(3, ghs); | |
b3b94faa DT |
282 | if (error) |
283 | goto out; | |
284 | ||
285 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
286 | if (error) | |
287 | goto out_gunlock; | |
288 | ||
feaa7bba | 289 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
290 | if (error) |
291 | goto out_gunlock; | |
292 | ||
feaa7bba SW |
293 | error = gfs2_dir_del(dip, &dentry->d_name); |
294 | if (error) | |
295 | goto out_end_trans; | |
b3b94faa | 296 | |
feaa7bba | 297 | error = gfs2_change_nlink(ip, -1); |
b3b94faa | 298 | |
feaa7bba SW |
299 | out_end_trans: |
300 | gfs2_trans_end(sdp); | |
301 | out_gunlock: | |
ddee7608 | 302 | gfs2_glock_dq_m(3, ghs); |
feaa7bba | 303 | out: |
b3b94faa DT |
304 | gfs2_holder_uninit(ghs); |
305 | gfs2_holder_uninit(ghs + 1); | |
ddee7608 RC |
306 | gfs2_holder_uninit(ghs + 2); |
307 | gfs2_glock_dq_uninit(&ri_gh); | |
b3b94faa DT |
308 | return error; |
309 | } | |
310 | ||
311 | /** | |
312 | * gfs2_symlink - Create a symlink | |
313 | * @dir: The directory to create the symlink in | |
314 | * @dentry: The dentry to put the symlink in | |
315 | * @symname: The thing which the link points to | |
316 | * | |
317 | * Returns: errno | |
318 | */ | |
319 | ||
320 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
321 | const char *symname) | |
322 | { | |
feaa7bba SW |
323 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
324 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
325 | struct gfs2_holder ghs[2]; |
326 | struct inode *inode; | |
327 | struct buffer_head *dibh; | |
328 | int size; | |
329 | int error; | |
330 | ||
b3b94faa DT |
331 | /* Must be stuffed with a null terminator for gfs2_follow_link() */ |
332 | size = strlen(symname); | |
333 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
334 | return -ENAMETOOLONG; | |
335 | ||
336 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
337 | ||
e7f14f4d | 338 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0); |
7359a19c | 339 | if (IS_ERR(inode)) { |
b3b94faa | 340 | gfs2_holder_uninit(ghs); |
7359a19c | 341 | return PTR_ERR(inode); |
b3b94faa DT |
342 | } |
343 | ||
5c676f6d | 344 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa DT |
345 | |
346 | ip->i_di.di_size = size; | |
347 | ||
348 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
349 | ||
350 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
539e5d6b | 351 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
352 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, |
353 | size); | |
354 | brelse(dibh); | |
355 | } | |
356 | ||
357 | gfs2_trans_end(sdp); | |
358 | if (dip->i_alloc.al_rgd) | |
359 | gfs2_inplace_release(dip); | |
360 | gfs2_quota_unlock(dip); | |
361 | gfs2_alloc_put(dip); | |
362 | ||
363 | gfs2_glock_dq_uninit_m(2, ghs); | |
364 | ||
b3b94faa DT |
365 | d_instantiate(dentry, inode); |
366 | mark_inode_dirty(inode); | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | /** | |
372 | * gfs2_mkdir - Make a directory | |
373 | * @dir: The parent directory of the new one | |
374 | * @dentry: The dentry of the new directory | |
375 | * @mode: The mode of the new directory | |
376 | * | |
377 | * Returns: errno | |
378 | */ | |
379 | ||
380 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
381 | { | |
feaa7bba SW |
382 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
383 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
384 | struct gfs2_holder ghs[2]; |
385 | struct inode *inode; | |
386 | struct buffer_head *dibh; | |
387 | int error; | |
388 | ||
b3b94faa DT |
389 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
390 | ||
e7f14f4d | 391 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0); |
7359a19c | 392 | if (IS_ERR(inode)) { |
b3b94faa | 393 | gfs2_holder_uninit(ghs); |
7359a19c | 394 | return PTR_ERR(inode); |
b3b94faa DT |
395 | } |
396 | ||
5c676f6d | 397 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa | 398 | |
4f56110a | 399 | ip->i_inode.i_nlink = 2; |
b3b94faa DT |
400 | ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); |
401 | ip->i_di.di_flags |= GFS2_DIF_JDATA; | |
b3b94faa DT |
402 | ip->i_di.di_entries = 2; |
403 | ||
404 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
405 | ||
406 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
407 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
c752666c | 408 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); |
71b86f56 | 409 | struct qstr str; |
b3b94faa | 410 | |
71b86f56 | 411 | gfs2_str2qstr(&str, "."); |
c752666c SW |
412 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
413 | gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent); | |
b3b94faa | 414 | dent->de_inum = di->di_num; /* already GFS2 endian */ |
7ecdb70a | 415 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa DT |
416 | di->di_entries = cpu_to_be32(1); |
417 | ||
71b86f56 | 418 | gfs2_str2qstr(&str, ".."); |
c752666c SW |
419 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); |
420 | gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
b3b94faa | 421 | |
dbb7cae2 | 422 | gfs2_inum_out(dip, dent); |
7ecdb70a | 423 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa | 424 | |
539e5d6b | 425 | gfs2_dinode_out(ip, di); |
b3b94faa DT |
426 | |
427 | brelse(dibh); | |
428 | } | |
429 | ||
430 | error = gfs2_change_nlink(dip, +1); | |
431 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ | |
432 | ||
433 | gfs2_trans_end(sdp); | |
434 | if (dip->i_alloc.al_rgd) | |
435 | gfs2_inplace_release(dip); | |
436 | gfs2_quota_unlock(dip); | |
437 | gfs2_alloc_put(dip); | |
438 | ||
439 | gfs2_glock_dq_uninit_m(2, ghs); | |
440 | ||
b3b94faa DT |
441 | d_instantiate(dentry, inode); |
442 | mark_inode_dirty(inode); | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | /** | |
448 | * gfs2_rmdir - Remove a directory | |
449 | * @dir: The parent directory of the directory to be removed | |
450 | * @dentry: The dentry of the directory to remove | |
451 | * | |
452 | * Remove a directory. Call gfs2_rmdiri() | |
453 | * | |
454 | * Returns: errno | |
455 | */ | |
456 | ||
457 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) | |
458 | { | |
feaa7bba SW |
459 | struct gfs2_inode *dip = GFS2_I(dir); |
460 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
461 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
462 | struct gfs2_holder ghs[3]; |
463 | struct gfs2_rgrpd *rgd; | |
464 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
465 | int error; |
466 | ||
ddee7608 RC |
467 | |
468 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
469 | if (error) | |
470 | return error; | |
b3b94faa DT |
471 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
472 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
473 | ||
dbb7cae2 | 474 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
475 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
476 | ||
477 | error = gfs2_glock_nq_m(3, ghs); | |
b3b94faa DT |
478 | if (error) |
479 | goto out; | |
480 | ||
481 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
482 | if (error) | |
483 | goto out_gunlock; | |
484 | ||
485 | if (ip->i_di.di_entries < 2) { | |
486 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 487 | gfs2_dinode_print(ip); |
b3b94faa DT |
488 | error = -EIO; |
489 | goto out_gunlock; | |
490 | } | |
491 | if (ip->i_di.di_entries > 2) { | |
492 | error = -ENOTEMPTY; | |
493 | goto out_gunlock; | |
494 | } | |
495 | ||
feaa7bba | 496 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
497 | if (error) |
498 | goto out_gunlock; | |
499 | ||
feaa7bba | 500 | error = gfs2_rmdiri(dip, &dentry->d_name, ip); |
b3b94faa DT |
501 | |
502 | gfs2_trans_end(sdp); | |
503 | ||
a91ea69f | 504 | out_gunlock: |
ddee7608 | 505 | gfs2_glock_dq_m(3, ghs); |
a91ea69f | 506 | out: |
b3b94faa DT |
507 | gfs2_holder_uninit(ghs); |
508 | gfs2_holder_uninit(ghs + 1); | |
ddee7608 RC |
509 | gfs2_holder_uninit(ghs + 2); |
510 | gfs2_glock_dq_uninit(&ri_gh); | |
b3b94faa DT |
511 | return error; |
512 | } | |
513 | ||
514 | /** | |
515 | * gfs2_mknod - Make a special file | |
516 | * @dir: The directory in which the special file will reside | |
517 | * @dentry: The dentry of the special file | |
518 | * @mode: The mode of the special file | |
519 | * @rdev: The device specification of the special file | |
520 | * | |
521 | */ | |
522 | ||
523 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
524 | dev_t dev) | |
525 | { | |
e7f14f4d | 526 | struct gfs2_inode *dip = GFS2_I(dir); |
feaa7bba | 527 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
b3b94faa DT |
528 | struct gfs2_holder ghs[2]; |
529 | struct inode *inode; | |
b3b94faa DT |
530 | |
531 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
532 | ||
e7f14f4d | 533 | inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); |
7359a19c | 534 | if (IS_ERR(inode)) { |
b3b94faa | 535 | gfs2_holder_uninit(ghs); |
7359a19c | 536 | return PTR_ERR(inode); |
b3b94faa DT |
537 | } |
538 | ||
b3b94faa DT |
539 | gfs2_trans_end(sdp); |
540 | if (dip->i_alloc.al_rgd) | |
541 | gfs2_inplace_release(dip); | |
542 | gfs2_quota_unlock(dip); | |
543 | gfs2_alloc_put(dip); | |
544 | ||
545 | gfs2_glock_dq_uninit_m(2, ghs); | |
546 | ||
b3b94faa DT |
547 | d_instantiate(dentry, inode); |
548 | mark_inode_dirty(inode); | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | /** | |
554 | * gfs2_rename - Rename a file | |
555 | * @odir: Parent directory of old file name | |
556 | * @odentry: The old dentry of the file | |
557 | * @ndir: Parent directory of new file name | |
558 | * @ndentry: The new dentry of the file | |
559 | * | |
560 | * Returns: errno | |
561 | */ | |
562 | ||
563 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
564 | struct inode *ndir, struct dentry *ndentry) | |
565 | { | |
feaa7bba SW |
566 | struct gfs2_inode *odip = GFS2_I(odir); |
567 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
568 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 569 | struct gfs2_inode *nip = NULL; |
feaa7bba | 570 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
ddee7608 RC |
571 | struct gfs2_holder ghs[5], r_gh; |
572 | struct gfs2_rgrpd *nrgd; | |
b3b94faa DT |
573 | unsigned int num_gh; |
574 | int dir_rename = 0; | |
575 | int alloc_required; | |
576 | unsigned int x; | |
577 | int error; | |
578 | ||
b3b94faa | 579 | if (ndentry->d_inode) { |
feaa7bba | 580 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
581 | if (ip == nip) |
582 | return 0; | |
583 | } | |
584 | ||
b3b94faa DT |
585 | /* Make sure we aren't trying to move a dirctory into it's subdir */ |
586 | ||
b60623c2 | 587 | if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) { |
b3b94faa DT |
588 | dir_rename = 1; |
589 | ||
b60623c2 | 590 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
591 | &r_gh); |
592 | if (error) | |
593 | goto out; | |
594 | ||
595 | error = gfs2_ok_to_move(ip, ndip); | |
596 | if (error) | |
597 | goto out_gunlock_r; | |
598 | } | |
599 | ||
d9d1ca30 | 600 | num_gh = 1; |
b3b94faa | 601 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
602 | if (odip != ndip) { |
603 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
604 | num_gh++; | |
605 | } | |
606 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
607 | num_gh++; | |
b3b94faa | 608 | |
d9d1ca30 SW |
609 | if (nip) { |
610 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
611 | num_gh++; | |
ddee7608 RC |
612 | /* grab the resource lock for unlink flag twiddling |
613 | * this is the case of the target file already existing | |
614 | * so we unlink before doing the rename | |
615 | */ | |
dbb7cae2 | 616 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); |
ddee7608 RC |
617 | if (nrgd) |
618 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 619 | } |
b3b94faa DT |
620 | |
621 | error = gfs2_glock_nq_m(num_gh, ghs); | |
622 | if (error) | |
623 | goto out_uninit; | |
624 | ||
625 | /* Check out the old directory */ | |
626 | ||
627 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
628 | if (error) | |
629 | goto out_gunlock; | |
630 | ||
631 | /* Check out the new directory */ | |
632 | ||
633 | if (nip) { | |
634 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
635 | if (error) | |
636 | goto out_gunlock; | |
637 | ||
b60623c2 | 638 | if (S_ISDIR(nip->i_inode.i_mode)) { |
b3b94faa DT |
639 | if (nip->i_di.di_entries < 2) { |
640 | if (gfs2_consist_inode(nip)) | |
4cc14f0b | 641 | gfs2_dinode_print(nip); |
b3b94faa DT |
642 | error = -EIO; |
643 | goto out_gunlock; | |
644 | } | |
645 | if (nip->i_di.di_entries > 2) { | |
646 | error = -ENOTEMPTY; | |
647 | goto out_gunlock; | |
648 | } | |
649 | } | |
650 | } else { | |
faf450ef | 651 | error = permission(ndir, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
652 | if (error) |
653 | goto out_gunlock; | |
654 | ||
dbb7cae2 | 655 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
656 | switch (error) { |
657 | case -ENOENT: | |
658 | error = 0; | |
659 | break; | |
660 | case 0: | |
661 | error = -EEXIST; | |
662 | default: | |
663 | goto out_gunlock; | |
664 | }; | |
665 | ||
666 | if (odip != ndip) { | |
4f56110a | 667 | if (!ndip->i_inode.i_nlink) { |
b3b94faa DT |
668 | error = -EINVAL; |
669 | goto out_gunlock; | |
670 | } | |
cd915493 | 671 | if (ndip->i_di.di_entries == (u32)-1) { |
b3b94faa DT |
672 | error = -EFBIG; |
673 | goto out_gunlock; | |
674 | } | |
b60623c2 | 675 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 676 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
677 | error = -EMLINK; |
678 | goto out_gunlock; | |
679 | } | |
680 | } | |
681 | } | |
682 | ||
683 | /* Check out the dir to be renamed */ | |
684 | ||
685 | if (dir_rename) { | |
faf450ef | 686 | error = permission(odentry->d_inode, MAY_WRITE, NULL); |
b3b94faa DT |
687 | if (error) |
688 | goto out_gunlock; | |
689 | } | |
690 | ||
c752666c SW |
691 | alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); |
692 | if (error < 0) | |
b3b94faa | 693 | goto out_gunlock; |
c752666c | 694 | error = 0; |
b3b94faa DT |
695 | |
696 | if (alloc_required) { | |
697 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
698 | ||
699 | error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
700 | if (error) | |
701 | goto out_alloc; | |
702 | ||
2933f925 | 703 | error = gfs2_quota_check(ndip, ndip->i_inode.i_uid, ndip->i_inode.i_gid); |
b3b94faa DT |
704 | if (error) |
705 | goto out_gunlock_q; | |
706 | ||
707 | al->al_requested = sdp->sd_max_dirres; | |
708 | ||
709 | error = gfs2_inplace_reserve(ndip); | |
710 | if (error) | |
711 | goto out_gunlock_q; | |
712 | ||
fe1bdedc | 713 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 714 | al->al_rgd->rd_length + |
b3b94faa | 715 | 4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07 | 716 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
717 | if (error) |
718 | goto out_ipreserv; | |
719 | } else { | |
720 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 721 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
722 | if (error) |
723 | goto out_gunlock; | |
724 | } | |
725 | ||
726 | /* Remove the target file, if it exists */ | |
727 | ||
728 | if (nip) { | |
b60623c2 | 729 | if (S_ISDIR(nip->i_inode.i_mode)) |
feaa7bba SW |
730 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); |
731 | else { | |
732 | error = gfs2_dir_del(ndip, &ndentry->d_name); | |
733 | if (error) | |
734 | goto out_end_trans; | |
87d21e07 | 735 | error = gfs2_change_nlink(nip, -1); |
feaa7bba | 736 | } |
b3b94faa DT |
737 | if (error) |
738 | goto out_end_trans; | |
739 | } | |
740 | ||
741 | if (dir_rename) { | |
742 | struct qstr name; | |
71b86f56 | 743 | gfs2_str2qstr(&name, ".."); |
b3b94faa DT |
744 | |
745 | error = gfs2_change_nlink(ndip, +1); | |
746 | if (error) | |
747 | goto out_end_trans; | |
748 | error = gfs2_change_nlink(odip, -1); | |
749 | if (error) | |
750 | goto out_end_trans; | |
751 | ||
dbb7cae2 | 752 | error = gfs2_dir_mvino(ip, &name, nip, DT_DIR); |
b3b94faa DT |
753 | if (error) |
754 | goto out_end_trans; | |
755 | } else { | |
756 | struct buffer_head *dibh; | |
757 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
758 | if (error) | |
759 | goto out_end_trans; | |
4bd91ba1 | 760 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 761 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 762 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
763 | brelse(dibh); |
764 | } | |
765 | ||
766 | error = gfs2_dir_del(odip, &odentry->d_name); | |
767 | if (error) | |
768 | goto out_end_trans; | |
769 | ||
dbb7cae2 | 770 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
771 | if (error) |
772 | goto out_end_trans; | |
773 | ||
feaa7bba | 774 | out_end_trans: |
b3b94faa | 775 | gfs2_trans_end(sdp); |
feaa7bba | 776 | out_ipreserv: |
b3b94faa DT |
777 | if (alloc_required) |
778 | gfs2_inplace_release(ndip); | |
feaa7bba | 779 | out_gunlock_q: |
b3b94faa DT |
780 | if (alloc_required) |
781 | gfs2_quota_unlock(ndip); | |
feaa7bba | 782 | out_alloc: |
b3b94faa DT |
783 | if (alloc_required) |
784 | gfs2_alloc_put(ndip); | |
feaa7bba | 785 | out_gunlock: |
b3b94faa | 786 | gfs2_glock_dq_m(num_gh, ghs); |
feaa7bba | 787 | out_uninit: |
b3b94faa DT |
788 | for (x = 0; x < num_gh; x++) |
789 | gfs2_holder_uninit(ghs + x); | |
feaa7bba | 790 | out_gunlock_r: |
b3b94faa DT |
791 | if (dir_rename) |
792 | gfs2_glock_dq_uninit(&r_gh); | |
feaa7bba | 793 | out: |
b3b94faa DT |
794 | return error; |
795 | } | |
796 | ||
797 | /** | |
798 | * gfs2_readlink - Read the value of a symlink | |
799 | * @dentry: the symlink | |
800 | * @buf: the buffer to read the symlink data into | |
801 | * @size: the size of the buffer | |
802 | * | |
803 | * Returns: errno | |
804 | */ | |
805 | ||
806 | static int gfs2_readlink(struct dentry *dentry, char __user *user_buf, | |
807 | int user_size) | |
808 | { | |
feaa7bba | 809 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
810 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
811 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
812 | int error; | |
813 | ||
b3b94faa DT |
814 | error = gfs2_readlinki(ip, &buf, &len); |
815 | if (error) | |
816 | return error; | |
817 | ||
818 | if (user_size > len - 1) | |
819 | user_size = len - 1; | |
820 | ||
821 | if (copy_to_user(user_buf, buf, user_size)) | |
822 | error = -EFAULT; | |
823 | else | |
824 | error = user_size; | |
825 | ||
826 | if (buf != array) | |
827 | kfree(buf); | |
828 | ||
829 | return error; | |
830 | } | |
831 | ||
832 | /** | |
833 | * gfs2_follow_link - Follow a symbolic link | |
834 | * @dentry: The dentry of the link | |
835 | * @nd: Data that we pass to vfs_follow_link() | |
836 | * | |
837 | * This can handle symlinks of any size. It is optimised for symlinks | |
838 | * under GFS2_FAST_NAME_SIZE. | |
839 | * | |
840 | * Returns: 0 on success or error code | |
841 | */ | |
842 | ||
843 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) | |
844 | { | |
feaa7bba | 845 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
846 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
847 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
848 | int error; | |
849 | ||
b3b94faa DT |
850 | error = gfs2_readlinki(ip, &buf, &len); |
851 | if (!error) { | |
852 | error = vfs_follow_link(nd, buf); | |
853 | if (buf != array) | |
854 | kfree(buf); | |
855 | } | |
856 | ||
857 | return ERR_PTR(error); | |
858 | } | |
859 | ||
860 | /** | |
861 | * gfs2_permission - | |
862 | * @inode: | |
863 | * @mask: | |
864 | * @nd: passed from Linux VFS, ignored by us | |
865 | * | |
300c7d75 SW |
866 | * This may be called from the VFS directly, or from within GFS2 with the |
867 | * inode locked, so we look to see if the glock is already locked and only | |
868 | * lock the glock if its not already been done. | |
869 | * | |
b3b94faa DT |
870 | * Returns: errno |
871 | */ | |
872 | ||
873 | static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd) | |
874 | { | |
feaa7bba | 875 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
876 | struct gfs2_holder i_gh; |
877 | int error; | |
300c7d75 | 878 | int unlock = 0; |
b3b94faa | 879 | |
300c7d75 SW |
880 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) { |
881 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
882 | if (error) | |
883 | return error; | |
884 | unlock = 1; | |
885 | } | |
b3b94faa | 886 | |
77386e1f | 887 | error = generic_permission(inode, mask, gfs2_check_acl); |
300c7d75 | 888 | if (unlock) |
b3b94faa | 889 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
890 | |
891 | return error; | |
892 | } | |
893 | ||
894 | static int setattr_size(struct inode *inode, struct iattr *attr) | |
895 | { | |
feaa7bba | 896 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
897 | int error; |
898 | ||
899 | if (attr->ia_size != ip->i_di.di_size) { | |
900 | error = vmtruncate(inode, attr->ia_size); | |
901 | if (error) | |
902 | return error; | |
903 | } | |
904 | ||
aa6a85a9 | 905 | error = gfs2_truncatei(ip, attr->ia_size); |
b3b94faa DT |
906 | if (error) |
907 | return error; | |
908 | ||
909 | return error; | |
910 | } | |
911 | ||
912 | static int setattr_chown(struct inode *inode, struct iattr *attr) | |
913 | { | |
feaa7bba SW |
914 | struct gfs2_inode *ip = GFS2_I(inode); |
915 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
b3b94faa | 916 | struct buffer_head *dibh; |
cd915493 | 917 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
918 | int error; |
919 | ||
2933f925 SW |
920 | ouid = inode->i_uid; |
921 | ogid = inode->i_gid; | |
b3b94faa DT |
922 | nuid = attr->ia_uid; |
923 | ngid = attr->ia_gid; | |
924 | ||
925 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
926 | ouid = nuid = NO_QUOTA_CHANGE; | |
927 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
928 | ogid = ngid = NO_QUOTA_CHANGE; | |
929 | ||
930 | gfs2_alloc_get(ip); | |
931 | ||
932 | error = gfs2_quota_lock(ip, nuid, ngid); | |
933 | if (error) | |
934 | goto out_alloc; | |
935 | ||
936 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
937 | error = gfs2_quota_check(ip, nuid, ngid); | |
938 | if (error) | |
939 | goto out_gunlock_q; | |
940 | } | |
941 | ||
942 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
943 | if (error) | |
944 | goto out_gunlock_q; | |
945 | ||
946 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
947 | if (error) | |
948 | goto out_end_trans; | |
949 | ||
950 | error = inode_setattr(inode, attr); | |
951 | gfs2_assert_warn(sdp, !error); | |
b3b94faa | 952 | |
d4e9c4c3 | 953 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 954 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
955 | brelse(dibh); |
956 | ||
957 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
af18ddb8 SW |
958 | gfs2_quota_change(ip, -ip->i_di.di_blocks, ouid, ogid); |
959 | gfs2_quota_change(ip, ip->i_di.di_blocks, nuid, ngid); | |
b3b94faa DT |
960 | } |
961 | ||
a91ea69f | 962 | out_end_trans: |
b3b94faa | 963 | gfs2_trans_end(sdp); |
a91ea69f | 964 | out_gunlock_q: |
b3b94faa | 965 | gfs2_quota_unlock(ip); |
a91ea69f | 966 | out_alloc: |
b3b94faa | 967 | gfs2_alloc_put(ip); |
b3b94faa DT |
968 | return error; |
969 | } | |
970 | ||
971 | /** | |
972 | * gfs2_setattr - Change attributes on an inode | |
973 | * @dentry: The dentry which is changing | |
974 | * @attr: The structure describing the change | |
975 | * | |
976 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
977 | * that change out to disk. | |
978 | * | |
979 | * Returns: errno | |
980 | */ | |
981 | ||
982 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
983 | { | |
984 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 985 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
986 | struct gfs2_holder i_gh; |
987 | int error; | |
988 | ||
b3b94faa DT |
989 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
990 | if (error) | |
991 | return error; | |
992 | ||
993 | error = -EPERM; | |
994 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
995 | goto out; | |
996 | ||
997 | error = inode_change_ok(inode, attr); | |
998 | if (error) | |
999 | goto out; | |
1000 | ||
1001 | if (attr->ia_valid & ATTR_SIZE) | |
1002 | error = setattr_size(inode, attr); | |
1003 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) | |
1004 | error = setattr_chown(inode, attr); | |
1005 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1006 | error = gfs2_acl_chmod(ip, attr); | |
1007 | else | |
1008 | error = gfs2_setattr_simple(ip, attr); | |
1009 | ||
a91ea69f | 1010 | out: |
b3b94faa | 1011 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1012 | if (!error) |
1013 | mark_inode_dirty(inode); | |
b3b94faa DT |
1014 | return error; |
1015 | } | |
1016 | ||
1017 | /** | |
1018 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1019 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1020 | * @dentry: The dentry to stat |
1021 | * @stat: The inode's stats | |
1022 | * | |
dcf3dd85 SW |
1023 | * This may be called from the VFS directly, or from within GFS2 with the |
1024 | * inode locked, so we look to see if the glock is already locked and only | |
1025 | * lock the glock if its not already been done. Note that its the NFS | |
1026 | * readdirplus operation which causes this to be called (from filldir) | |
1027 | * with the glock already held. | |
1028 | * | |
b3b94faa DT |
1029 | * Returns: errno |
1030 | */ | |
1031 | ||
1032 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1033 | struct kstat *stat) | |
1034 | { | |
1035 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1036 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1037 | struct gfs2_holder gh; |
1038 | int error; | |
dcf3dd85 | 1039 | int unlock = 0; |
b3b94faa | 1040 | |
dcf3dd85 SW |
1041 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) { |
1042 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
1043 | if (error) | |
1044 | return error; | |
1045 | unlock = 1; | |
b3b94faa DT |
1046 | } |
1047 | ||
dcf3dd85 | 1048 | generic_fillattr(inode, stat); |
d7c103d0 | 1049 | if (unlock) |
dcf3dd85 SW |
1050 | gfs2_glock_dq_uninit(&gh); |
1051 | ||
1052 | return 0; | |
b3b94faa DT |
1053 | } |
1054 | ||
1055 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1056 | const void *data, size_t size, int flags) | |
1057 | { | |
feaa7bba | 1058 | struct inode *inode = dentry->d_inode; |
b3b94faa DT |
1059 | struct gfs2_ea_request er; |
1060 | ||
b3b94faa DT |
1061 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1062 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1063 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1064 | return -EOPNOTSUPP; | |
1065 | er.er_data = (char *)data; | |
1066 | er.er_name_len = strlen(er.er_name); | |
1067 | er.er_data_len = size; | |
1068 | er.er_flags = flags; | |
1069 | ||
feaa7bba | 1070 | gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE)); |
b3b94faa | 1071 | |
feaa7bba | 1072 | return gfs2_ea_set(GFS2_I(inode), &er); |
b3b94faa DT |
1073 | } |
1074 | ||
1075 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1076 | void *data, size_t size) | |
1077 | { | |
1078 | struct gfs2_ea_request er; | |
1079 | ||
b3b94faa DT |
1080 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1081 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1082 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1083 | return -EOPNOTSUPP; | |
1084 | er.er_data = data; | |
1085 | er.er_name_len = strlen(er.er_name); | |
1086 | er.er_data_len = size; | |
1087 | ||
feaa7bba | 1088 | return gfs2_ea_get(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1089 | } |
1090 | ||
1091 | static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) | |
1092 | { | |
1093 | struct gfs2_ea_request er; | |
1094 | ||
b3b94faa DT |
1095 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1096 | er.er_data = (size) ? buffer : NULL; | |
1097 | er.er_data_len = size; | |
1098 | ||
feaa7bba | 1099 | return gfs2_ea_list(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1100 | } |
1101 | ||
1102 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1103 | { | |
1104 | struct gfs2_ea_request er; | |
1105 | ||
b3b94faa DT |
1106 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1107 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1108 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1109 | return -EOPNOTSUPP; | |
1110 | er.er_name_len = strlen(er.er_name); | |
1111 | ||
feaa7bba | 1112 | return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1113 | } |
1114 | ||
92e1d5be | 1115 | const struct inode_operations gfs2_file_iops = { |
b3b94faa DT |
1116 | .permission = gfs2_permission, |
1117 | .setattr = gfs2_setattr, | |
1118 | .getattr = gfs2_getattr, | |
1119 | .setxattr = gfs2_setxattr, | |
1120 | .getxattr = gfs2_getxattr, | |
1121 | .listxattr = gfs2_listxattr, | |
1122 | .removexattr = gfs2_removexattr, | |
1123 | }; | |
1124 | ||
92e1d5be | 1125 | const struct inode_operations gfs2_dev_iops = { |
b3b94faa DT |
1126 | .permission = gfs2_permission, |
1127 | .setattr = gfs2_setattr, | |
1128 | .getattr = gfs2_getattr, | |
1129 | .setxattr = gfs2_setxattr, | |
1130 | .getxattr = gfs2_getxattr, | |
1131 | .listxattr = gfs2_listxattr, | |
1132 | .removexattr = gfs2_removexattr, | |
1133 | }; | |
1134 | ||
92e1d5be | 1135 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1136 | .create = gfs2_create, |
1137 | .lookup = gfs2_lookup, | |
1138 | .link = gfs2_link, | |
1139 | .unlink = gfs2_unlink, | |
1140 | .symlink = gfs2_symlink, | |
1141 | .mkdir = gfs2_mkdir, | |
1142 | .rmdir = gfs2_rmdir, | |
1143 | .mknod = gfs2_mknod, | |
1144 | .rename = gfs2_rename, | |
1145 | .permission = gfs2_permission, | |
1146 | .setattr = gfs2_setattr, | |
1147 | .getattr = gfs2_getattr, | |
1148 | .setxattr = gfs2_setxattr, | |
1149 | .getxattr = gfs2_getxattr, | |
1150 | .listxattr = gfs2_listxattr, | |
1151 | .removexattr = gfs2_removexattr, | |
1152 | }; | |
1153 | ||
92e1d5be | 1154 | const struct inode_operations gfs2_symlink_iops = { |
b3b94faa DT |
1155 | .readlink = gfs2_readlink, |
1156 | .follow_link = gfs2_follow_link, | |
1157 | .permission = gfs2_permission, | |
1158 | .setattr = gfs2_setattr, | |
1159 | .getattr = gfs2_getattr, | |
1160 | .setxattr = gfs2_setxattr, | |
1161 | .getxattr = gfs2_getxattr, | |
1162 | .listxattr = gfs2_listxattr, | |
1163 | .removexattr = gfs2_removexattr, | |
1164 | }; | |
1165 |