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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 | ||
c752666c | 160 | error = gfs2_dir_search(dir, &dentry->d_name, NULL, 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 + |
b3b94faa DT |
209 | al->al_rgd->rd_ri.ri_length + |
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 | ||
c752666c | 220 | error = gfs2_dir_add(dir, &dentry->d_name, &ip->i_num, |
b60623c2 | 221 | IF2DT(inode->i_mode)); |
b3b94faa DT |
222 | if (error) |
223 | goto out_end_trans; | |
224 | ||
225 | error = gfs2_change_nlink(ip, +1); | |
226 | ||
feaa7bba | 227 | out_end_trans: |
b3b94faa | 228 | gfs2_trans_end(sdp); |
feaa7bba | 229 | out_ipres: |
b3b94faa DT |
230 | if (alloc_required) |
231 | gfs2_inplace_release(dip); | |
feaa7bba | 232 | out_gunlock_q: |
b3b94faa DT |
233 | if (alloc_required) |
234 | gfs2_quota_unlock(dip); | |
feaa7bba | 235 | out_alloc: |
b3b94faa DT |
236 | if (alloc_required) |
237 | gfs2_alloc_put(dip); | |
feaa7bba | 238 | out_gunlock: |
b3b94faa | 239 | gfs2_glock_dq_m(2, ghs); |
feaa7bba | 240 | out: |
b3b94faa DT |
241 | gfs2_holder_uninit(ghs); |
242 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa | 243 | if (!error) { |
29937ac6 | 244 | atomic_inc(&inode->i_count); |
b3b94faa DT |
245 | d_instantiate(dentry, inode); |
246 | mark_inode_dirty(inode); | |
247 | } | |
b3b94faa DT |
248 | return error; |
249 | } | |
250 | ||
251 | /** | |
252 | * gfs2_unlink - Unlink a file | |
253 | * @dir: The inode of the directory containing the file to unlink | |
254 | * @dentry: The file itself | |
255 | * | |
256 | * Unlink a file. Call gfs2_unlinki() | |
257 | * | |
258 | * Returns: errno | |
259 | */ | |
260 | ||
261 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
262 | { | |
feaa7bba SW |
263 | struct gfs2_inode *dip = GFS2_I(dir); |
264 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
265 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
266 | struct gfs2_holder ghs[3]; |
267 | struct gfs2_rgrpd *rgd; | |
268 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
269 | int error; |
270 | ||
ddee7608 RC |
271 | error = gfs2_rindex_hold(sdp, &ri_gh); |
272 | if (error) | |
273 | return error; | |
274 | ||
b3b94faa | 275 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 276 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 277 | |
ddee7608 RC |
278 | rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); |
279 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); | |
280 | ||
281 | ||
282 | error = gfs2_glock_nq_m(3, ghs); | |
b3b94faa DT |
283 | if (error) |
284 | goto out; | |
285 | ||
286 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
287 | if (error) | |
288 | goto out_gunlock; | |
289 | ||
feaa7bba | 290 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
291 | if (error) |
292 | goto out_gunlock; | |
293 | ||
feaa7bba SW |
294 | error = gfs2_dir_del(dip, &dentry->d_name); |
295 | if (error) | |
296 | goto out_end_trans; | |
b3b94faa | 297 | |
feaa7bba | 298 | error = gfs2_change_nlink(ip, -1); |
b3b94faa | 299 | |
feaa7bba SW |
300 | out_end_trans: |
301 | gfs2_trans_end(sdp); | |
302 | out_gunlock: | |
ddee7608 | 303 | gfs2_glock_dq_m(3, ghs); |
feaa7bba | 304 | out: |
b3b94faa DT |
305 | gfs2_holder_uninit(ghs); |
306 | gfs2_holder_uninit(ghs + 1); | |
ddee7608 RC |
307 | gfs2_holder_uninit(ghs + 2); |
308 | gfs2_glock_dq_uninit(&ri_gh); | |
b3b94faa DT |
309 | return error; |
310 | } | |
311 | ||
312 | /** | |
313 | * gfs2_symlink - Create a symlink | |
314 | * @dir: The directory to create the symlink in | |
315 | * @dentry: The dentry to put the symlink in | |
316 | * @symname: The thing which the link points to | |
317 | * | |
318 | * Returns: errno | |
319 | */ | |
320 | ||
321 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
322 | const char *symname) | |
323 | { | |
feaa7bba SW |
324 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
325 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
326 | struct gfs2_holder ghs[2]; |
327 | struct inode *inode; | |
328 | struct buffer_head *dibh; | |
329 | int size; | |
330 | int error; | |
331 | ||
b3b94faa DT |
332 | /* Must be stuffed with a null terminator for gfs2_follow_link() */ |
333 | size = strlen(symname); | |
334 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
335 | return -ENAMETOOLONG; | |
336 | ||
337 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
338 | ||
e7f14f4d | 339 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0); |
7359a19c | 340 | if (IS_ERR(inode)) { |
b3b94faa | 341 | gfs2_holder_uninit(ghs); |
7359a19c | 342 | return PTR_ERR(inode); |
b3b94faa DT |
343 | } |
344 | ||
5c676f6d | 345 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa DT |
346 | |
347 | ip->i_di.di_size = size; | |
348 | ||
349 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
350 | ||
351 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
539e5d6b | 352 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
353 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, |
354 | size); | |
355 | brelse(dibh); | |
356 | } | |
357 | ||
358 | gfs2_trans_end(sdp); | |
359 | if (dip->i_alloc.al_rgd) | |
360 | gfs2_inplace_release(dip); | |
361 | gfs2_quota_unlock(dip); | |
362 | gfs2_alloc_put(dip); | |
363 | ||
364 | gfs2_glock_dq_uninit_m(2, ghs); | |
365 | ||
b3b94faa DT |
366 | d_instantiate(dentry, inode); |
367 | mark_inode_dirty(inode); | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | /** | |
373 | * gfs2_mkdir - Make a directory | |
374 | * @dir: The parent directory of the new one | |
375 | * @dentry: The dentry of the new directory | |
376 | * @mode: The mode of the new directory | |
377 | * | |
378 | * Returns: errno | |
379 | */ | |
380 | ||
381 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
382 | { | |
feaa7bba SW |
383 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
384 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
385 | struct gfs2_holder ghs[2]; |
386 | struct inode *inode; | |
387 | struct buffer_head *dibh; | |
388 | int error; | |
389 | ||
b3b94faa DT |
390 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
391 | ||
e7f14f4d | 392 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0); |
7359a19c | 393 | if (IS_ERR(inode)) { |
b3b94faa | 394 | gfs2_holder_uninit(ghs); |
7359a19c | 395 | return PTR_ERR(inode); |
b3b94faa DT |
396 | } |
397 | ||
5c676f6d | 398 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa | 399 | |
4f56110a | 400 | ip->i_inode.i_nlink = 2; |
b3b94faa DT |
401 | ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); |
402 | ip->i_di.di_flags |= GFS2_DIF_JDATA; | |
b3b94faa DT |
403 | ip->i_di.di_entries = 2; |
404 | ||
405 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
406 | ||
407 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
408 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
c752666c | 409 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); |
71b86f56 | 410 | struct qstr str; |
b3b94faa | 411 | |
71b86f56 | 412 | gfs2_str2qstr(&str, "."); |
c752666c SW |
413 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
414 | gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent); | |
b3b94faa | 415 | dent->de_inum = di->di_num; /* already GFS2 endian */ |
7ecdb70a | 416 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa DT |
417 | di->di_entries = cpu_to_be32(1); |
418 | ||
71b86f56 | 419 | gfs2_str2qstr(&str, ".."); |
c752666c SW |
420 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); |
421 | gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
b3b94faa | 422 | |
409e185d | 423 | gfs2_inum_out(&dip->i_num, &dent->de_inum); |
7ecdb70a | 424 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa | 425 | |
539e5d6b | 426 | gfs2_dinode_out(ip, di); |
b3b94faa DT |
427 | |
428 | brelse(dibh); | |
429 | } | |
430 | ||
431 | error = gfs2_change_nlink(dip, +1); | |
432 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ | |
433 | ||
434 | gfs2_trans_end(sdp); | |
435 | if (dip->i_alloc.al_rgd) | |
436 | gfs2_inplace_release(dip); | |
437 | gfs2_quota_unlock(dip); | |
438 | gfs2_alloc_put(dip); | |
439 | ||
440 | gfs2_glock_dq_uninit_m(2, ghs); | |
441 | ||
b3b94faa DT |
442 | d_instantiate(dentry, inode); |
443 | mark_inode_dirty(inode); | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | /** | |
449 | * gfs2_rmdir - Remove a directory | |
450 | * @dir: The parent directory of the directory to be removed | |
451 | * @dentry: The dentry of the directory to remove | |
452 | * | |
453 | * Remove a directory. Call gfs2_rmdiri() | |
454 | * | |
455 | * Returns: errno | |
456 | */ | |
457 | ||
458 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) | |
459 | { | |
feaa7bba SW |
460 | struct gfs2_inode *dip = GFS2_I(dir); |
461 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
462 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
463 | struct gfs2_holder ghs[3]; |
464 | struct gfs2_rgrpd *rgd; | |
465 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
466 | int error; |
467 | ||
ddee7608 RC |
468 | |
469 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
470 | if (error) | |
471 | return error; | |
b3b94faa DT |
472 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
473 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
474 | ||
ddee7608 RC |
475 | rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); |
476 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); | |
477 | ||
478 | error = gfs2_glock_nq_m(3, ghs); | |
b3b94faa DT |
479 | if (error) |
480 | goto out; | |
481 | ||
482 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
483 | if (error) | |
484 | goto out_gunlock; | |
485 | ||
486 | if (ip->i_di.di_entries < 2) { | |
487 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 488 | gfs2_dinode_print(ip); |
b3b94faa DT |
489 | error = -EIO; |
490 | goto out_gunlock; | |
491 | } | |
492 | if (ip->i_di.di_entries > 2) { | |
493 | error = -ENOTEMPTY; | |
494 | goto out_gunlock; | |
495 | } | |
496 | ||
feaa7bba | 497 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
498 | if (error) |
499 | goto out_gunlock; | |
500 | ||
feaa7bba | 501 | error = gfs2_rmdiri(dip, &dentry->d_name, ip); |
b3b94faa DT |
502 | |
503 | gfs2_trans_end(sdp); | |
504 | ||
a91ea69f | 505 | out_gunlock: |
ddee7608 | 506 | gfs2_glock_dq_m(3, ghs); |
a91ea69f | 507 | out: |
b3b94faa DT |
508 | gfs2_holder_uninit(ghs); |
509 | gfs2_holder_uninit(ghs + 1); | |
ddee7608 RC |
510 | gfs2_holder_uninit(ghs + 2); |
511 | gfs2_glock_dq_uninit(&ri_gh); | |
b3b94faa DT |
512 | return error; |
513 | } | |
514 | ||
515 | /** | |
516 | * gfs2_mknod - Make a special file | |
517 | * @dir: The directory in which the special file will reside | |
518 | * @dentry: The dentry of the special file | |
519 | * @mode: The mode of the special file | |
520 | * @rdev: The device specification of the special file | |
521 | * | |
522 | */ | |
523 | ||
524 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
525 | dev_t dev) | |
526 | { | |
e7f14f4d | 527 | struct gfs2_inode *dip = GFS2_I(dir); |
feaa7bba | 528 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
b3b94faa DT |
529 | struct gfs2_holder ghs[2]; |
530 | struct inode *inode; | |
b3b94faa DT |
531 | |
532 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
533 | ||
e7f14f4d | 534 | inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); |
7359a19c | 535 | if (IS_ERR(inode)) { |
b3b94faa | 536 | gfs2_holder_uninit(ghs); |
7359a19c | 537 | return PTR_ERR(inode); |
b3b94faa DT |
538 | } |
539 | ||
b3b94faa DT |
540 | gfs2_trans_end(sdp); |
541 | if (dip->i_alloc.al_rgd) | |
542 | gfs2_inplace_release(dip); | |
543 | gfs2_quota_unlock(dip); | |
544 | gfs2_alloc_put(dip); | |
545 | ||
546 | gfs2_glock_dq_uninit_m(2, ghs); | |
547 | ||
b3b94faa DT |
548 | d_instantiate(dentry, inode); |
549 | mark_inode_dirty(inode); | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | /** | |
555 | * gfs2_rename - Rename a file | |
556 | * @odir: Parent directory of old file name | |
557 | * @odentry: The old dentry of the file | |
558 | * @ndir: Parent directory of new file name | |
559 | * @ndentry: The new dentry of the file | |
560 | * | |
561 | * Returns: errno | |
562 | */ | |
563 | ||
564 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
565 | struct inode *ndir, struct dentry *ndentry) | |
566 | { | |
feaa7bba SW |
567 | struct gfs2_inode *odip = GFS2_I(odir); |
568 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
569 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 570 | struct gfs2_inode *nip = NULL; |
feaa7bba | 571 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
ddee7608 RC |
572 | struct gfs2_holder ghs[5], r_gh; |
573 | struct gfs2_rgrpd *nrgd; | |
b3b94faa DT |
574 | unsigned int num_gh; |
575 | int dir_rename = 0; | |
576 | int alloc_required; | |
577 | unsigned int x; | |
578 | int error; | |
579 | ||
b3b94faa | 580 | if (ndentry->d_inode) { |
feaa7bba | 581 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
582 | if (ip == nip) |
583 | return 0; | |
584 | } | |
585 | ||
b3b94faa DT |
586 | /* Make sure we aren't trying to move a dirctory into it's subdir */ |
587 | ||
b60623c2 | 588 | if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) { |
b3b94faa DT |
589 | dir_rename = 1; |
590 | ||
b60623c2 | 591 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
592 | &r_gh); |
593 | if (error) | |
594 | goto out; | |
595 | ||
596 | error = gfs2_ok_to_move(ip, ndip); | |
597 | if (error) | |
598 | goto out_gunlock_r; | |
599 | } | |
600 | ||
d9d1ca30 | 601 | num_gh = 1; |
b3b94faa | 602 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
603 | if (odip != ndip) { |
604 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
605 | num_gh++; | |
606 | } | |
607 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
608 | num_gh++; | |
b3b94faa | 609 | |
d9d1ca30 SW |
610 | if (nip) { |
611 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
612 | num_gh++; | |
ddee7608 RC |
613 | /* grab the resource lock for unlink flag twiddling |
614 | * this is the case of the target file already existing | |
615 | * so we unlink before doing the rename | |
616 | */ | |
617 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_num.no_addr); | |
618 | if (nrgd) | |
619 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 620 | } |
b3b94faa DT |
621 | |
622 | error = gfs2_glock_nq_m(num_gh, ghs); | |
623 | if (error) | |
624 | goto out_uninit; | |
625 | ||
626 | /* Check out the old directory */ | |
627 | ||
628 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
629 | if (error) | |
630 | goto out_gunlock; | |
631 | ||
632 | /* Check out the new directory */ | |
633 | ||
634 | if (nip) { | |
635 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
636 | if (error) | |
637 | goto out_gunlock; | |
638 | ||
b60623c2 | 639 | if (S_ISDIR(nip->i_inode.i_mode)) { |
b3b94faa DT |
640 | if (nip->i_di.di_entries < 2) { |
641 | if (gfs2_consist_inode(nip)) | |
4cc14f0b | 642 | gfs2_dinode_print(nip); |
b3b94faa DT |
643 | error = -EIO; |
644 | goto out_gunlock; | |
645 | } | |
646 | if (nip->i_di.di_entries > 2) { | |
647 | error = -ENOTEMPTY; | |
648 | goto out_gunlock; | |
649 | } | |
650 | } | |
651 | } else { | |
faf450ef | 652 | error = permission(ndir, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
653 | if (error) |
654 | goto out_gunlock; | |
655 | ||
c752666c | 656 | error = gfs2_dir_search(ndir, &ndentry->d_name, NULL, NULL); |
b3b94faa DT |
657 | switch (error) { |
658 | case -ENOENT: | |
659 | error = 0; | |
660 | break; | |
661 | case 0: | |
662 | error = -EEXIST; | |
663 | default: | |
664 | goto out_gunlock; | |
665 | }; | |
666 | ||
667 | if (odip != ndip) { | |
4f56110a | 668 | if (!ndip->i_inode.i_nlink) { |
b3b94faa DT |
669 | error = -EINVAL; |
670 | goto out_gunlock; | |
671 | } | |
cd915493 | 672 | if (ndip->i_di.di_entries == (u32)-1) { |
b3b94faa DT |
673 | error = -EFBIG; |
674 | goto out_gunlock; | |
675 | } | |
b60623c2 | 676 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 677 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
678 | error = -EMLINK; |
679 | goto out_gunlock; | |
680 | } | |
681 | } | |
682 | } | |
683 | ||
684 | /* Check out the dir to be renamed */ | |
685 | ||
686 | if (dir_rename) { | |
faf450ef | 687 | error = permission(odentry->d_inode, MAY_WRITE, NULL); |
b3b94faa DT |
688 | if (error) |
689 | goto out_gunlock; | |
690 | } | |
691 | ||
c752666c SW |
692 | alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); |
693 | if (error < 0) | |
b3b94faa | 694 | goto out_gunlock; |
c752666c | 695 | error = 0; |
b3b94faa DT |
696 | |
697 | if (alloc_required) { | |
698 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
699 | ||
700 | error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
701 | if (error) | |
702 | goto out_alloc; | |
703 | ||
2933f925 | 704 | error = gfs2_quota_check(ndip, ndip->i_inode.i_uid, ndip->i_inode.i_gid); |
b3b94faa DT |
705 | if (error) |
706 | goto out_gunlock_q; | |
707 | ||
708 | al->al_requested = sdp->sd_max_dirres; | |
709 | ||
710 | error = gfs2_inplace_reserve(ndip); | |
711 | if (error) | |
712 | goto out_gunlock_q; | |
713 | ||
fe1bdedc | 714 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
b3b94faa DT |
715 | al->al_rgd->rd_ri.ri_length + |
716 | 4 * RES_DINODE + 4 * RES_LEAF + | |
87d21e07 | 717 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
718 | if (error) |
719 | goto out_ipreserv; | |
720 | } else { | |
721 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 722 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
723 | if (error) |
724 | goto out_gunlock; | |
725 | } | |
726 | ||
727 | /* Remove the target file, if it exists */ | |
728 | ||
729 | if (nip) { | |
b60623c2 | 730 | if (S_ISDIR(nip->i_inode.i_mode)) |
feaa7bba SW |
731 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); |
732 | else { | |
733 | error = gfs2_dir_del(ndip, &ndentry->d_name); | |
734 | if (error) | |
735 | goto out_end_trans; | |
87d21e07 | 736 | error = gfs2_change_nlink(nip, -1); |
feaa7bba | 737 | } |
b3b94faa DT |
738 | if (error) |
739 | goto out_end_trans; | |
740 | } | |
741 | ||
742 | if (dir_rename) { | |
743 | struct qstr name; | |
71b86f56 | 744 | gfs2_str2qstr(&name, ".."); |
b3b94faa DT |
745 | |
746 | error = gfs2_change_nlink(ndip, +1); | |
747 | if (error) | |
748 | goto out_end_trans; | |
749 | error = gfs2_change_nlink(odip, -1); | |
750 | if (error) | |
751 | goto out_end_trans; | |
752 | ||
753 | error = gfs2_dir_mvino(ip, &name, &ndip->i_num, DT_DIR); | |
754 | if (error) | |
755 | goto out_end_trans; | |
756 | } else { | |
757 | struct buffer_head *dibh; | |
758 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
759 | if (error) | |
760 | goto out_end_trans; | |
ddfe0627 | 761 | ip->i_inode.i_ctime = CURRENT_TIME_SEC; |
d4e9c4c3 | 762 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 763 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
764 | brelse(dibh); |
765 | } | |
766 | ||
767 | error = gfs2_dir_del(odip, &odentry->d_name); | |
768 | if (error) | |
769 | goto out_end_trans; | |
770 | ||
c752666c | 771 | error = gfs2_dir_add(ndir, &ndentry->d_name, &ip->i_num, |
b60623c2 | 772 | IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
773 | if (error) |
774 | goto out_end_trans; | |
775 | ||
feaa7bba | 776 | out_end_trans: |
b3b94faa | 777 | gfs2_trans_end(sdp); |
feaa7bba | 778 | out_ipreserv: |
b3b94faa DT |
779 | if (alloc_required) |
780 | gfs2_inplace_release(ndip); | |
feaa7bba | 781 | out_gunlock_q: |
b3b94faa DT |
782 | if (alloc_required) |
783 | gfs2_quota_unlock(ndip); | |
feaa7bba | 784 | out_alloc: |
b3b94faa DT |
785 | if (alloc_required) |
786 | gfs2_alloc_put(ndip); | |
feaa7bba | 787 | out_gunlock: |
b3b94faa | 788 | gfs2_glock_dq_m(num_gh, ghs); |
feaa7bba | 789 | out_uninit: |
b3b94faa DT |
790 | for (x = 0; x < num_gh; x++) |
791 | gfs2_holder_uninit(ghs + x); | |
feaa7bba | 792 | out_gunlock_r: |
b3b94faa DT |
793 | if (dir_rename) |
794 | gfs2_glock_dq_uninit(&r_gh); | |
feaa7bba | 795 | out: |
b3b94faa DT |
796 | return error; |
797 | } | |
798 | ||
799 | /** | |
800 | * gfs2_readlink - Read the value of a symlink | |
801 | * @dentry: the symlink | |
802 | * @buf: the buffer to read the symlink data into | |
803 | * @size: the size of the buffer | |
804 | * | |
805 | * Returns: errno | |
806 | */ | |
807 | ||
808 | static int gfs2_readlink(struct dentry *dentry, char __user *user_buf, | |
809 | int user_size) | |
810 | { | |
feaa7bba | 811 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
812 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
813 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
814 | int error; | |
815 | ||
b3b94faa DT |
816 | error = gfs2_readlinki(ip, &buf, &len); |
817 | if (error) | |
818 | return error; | |
819 | ||
820 | if (user_size > len - 1) | |
821 | user_size = len - 1; | |
822 | ||
823 | if (copy_to_user(user_buf, buf, user_size)) | |
824 | error = -EFAULT; | |
825 | else | |
826 | error = user_size; | |
827 | ||
828 | if (buf != array) | |
829 | kfree(buf); | |
830 | ||
831 | return error; | |
832 | } | |
833 | ||
834 | /** | |
835 | * gfs2_follow_link - Follow a symbolic link | |
836 | * @dentry: The dentry of the link | |
837 | * @nd: Data that we pass to vfs_follow_link() | |
838 | * | |
839 | * This can handle symlinks of any size. It is optimised for symlinks | |
840 | * under GFS2_FAST_NAME_SIZE. | |
841 | * | |
842 | * Returns: 0 on success or error code | |
843 | */ | |
844 | ||
845 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) | |
846 | { | |
feaa7bba | 847 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
848 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
849 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
850 | int error; | |
851 | ||
b3b94faa DT |
852 | error = gfs2_readlinki(ip, &buf, &len); |
853 | if (!error) { | |
854 | error = vfs_follow_link(nd, buf); | |
855 | if (buf != array) | |
856 | kfree(buf); | |
857 | } | |
858 | ||
859 | return ERR_PTR(error); | |
860 | } | |
861 | ||
862 | /** | |
863 | * gfs2_permission - | |
864 | * @inode: | |
865 | * @mask: | |
866 | * @nd: passed from Linux VFS, ignored by us | |
867 | * | |
300c7d75 SW |
868 | * This may be called from the VFS directly, or from within GFS2 with the |
869 | * inode locked, so we look to see if the glock is already locked and only | |
870 | * lock the glock if its not already been done. | |
871 | * | |
b3b94faa DT |
872 | * Returns: errno |
873 | */ | |
874 | ||
875 | static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd) | |
876 | { | |
feaa7bba | 877 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
878 | struct gfs2_holder i_gh; |
879 | int error; | |
300c7d75 | 880 | int unlock = 0; |
b3b94faa | 881 | |
300c7d75 SW |
882 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) { |
883 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
884 | if (error) | |
885 | return error; | |
886 | unlock = 1; | |
887 | } | |
b3b94faa | 888 | |
77386e1f | 889 | error = generic_permission(inode, mask, gfs2_check_acl); |
300c7d75 | 890 | if (unlock) |
b3b94faa | 891 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
892 | |
893 | return error; | |
894 | } | |
895 | ||
896 | static int setattr_size(struct inode *inode, struct iattr *attr) | |
897 | { | |
feaa7bba | 898 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
899 | int error; |
900 | ||
901 | if (attr->ia_size != ip->i_di.di_size) { | |
902 | error = vmtruncate(inode, attr->ia_size); | |
903 | if (error) | |
904 | return error; | |
905 | } | |
906 | ||
aa6a85a9 | 907 | error = gfs2_truncatei(ip, attr->ia_size); |
b3b94faa DT |
908 | if (error) |
909 | return error; | |
910 | ||
911 | return error; | |
912 | } | |
913 | ||
914 | static int setattr_chown(struct inode *inode, struct iattr *attr) | |
915 | { | |
feaa7bba SW |
916 | struct gfs2_inode *ip = GFS2_I(inode); |
917 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
b3b94faa | 918 | struct buffer_head *dibh; |
cd915493 | 919 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
920 | int error; |
921 | ||
2933f925 SW |
922 | ouid = inode->i_uid; |
923 | ogid = inode->i_gid; | |
b3b94faa DT |
924 | nuid = attr->ia_uid; |
925 | ngid = attr->ia_gid; | |
926 | ||
927 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
928 | ouid = nuid = NO_QUOTA_CHANGE; | |
929 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
930 | ogid = ngid = NO_QUOTA_CHANGE; | |
931 | ||
932 | gfs2_alloc_get(ip); | |
933 | ||
934 | error = gfs2_quota_lock(ip, nuid, ngid); | |
935 | if (error) | |
936 | goto out_alloc; | |
937 | ||
938 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
939 | error = gfs2_quota_check(ip, nuid, ngid); | |
940 | if (error) | |
941 | goto out_gunlock_q; | |
942 | } | |
943 | ||
944 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
945 | if (error) | |
946 | goto out_gunlock_q; | |
947 | ||
948 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
949 | if (error) | |
950 | goto out_end_trans; | |
951 | ||
952 | error = inode_setattr(inode, attr); | |
953 | gfs2_assert_warn(sdp, !error); | |
b3b94faa | 954 | |
d4e9c4c3 | 955 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 956 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
957 | brelse(dibh); |
958 | ||
959 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
af18ddb8 SW |
960 | gfs2_quota_change(ip, -ip->i_di.di_blocks, ouid, ogid); |
961 | gfs2_quota_change(ip, ip->i_di.di_blocks, nuid, ngid); | |
b3b94faa DT |
962 | } |
963 | ||
a91ea69f | 964 | out_end_trans: |
b3b94faa | 965 | gfs2_trans_end(sdp); |
a91ea69f | 966 | out_gunlock_q: |
b3b94faa | 967 | gfs2_quota_unlock(ip); |
a91ea69f | 968 | out_alloc: |
b3b94faa | 969 | gfs2_alloc_put(ip); |
b3b94faa DT |
970 | return error; |
971 | } | |
972 | ||
973 | /** | |
974 | * gfs2_setattr - Change attributes on an inode | |
975 | * @dentry: The dentry which is changing | |
976 | * @attr: The structure describing the change | |
977 | * | |
978 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
979 | * that change out to disk. | |
980 | * | |
981 | * Returns: errno | |
982 | */ | |
983 | ||
984 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
985 | { | |
986 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 987 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
988 | struct gfs2_holder i_gh; |
989 | int error; | |
990 | ||
b3b94faa DT |
991 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
992 | if (error) | |
993 | return error; | |
994 | ||
995 | error = -EPERM; | |
996 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
997 | goto out; | |
998 | ||
999 | error = inode_change_ok(inode, attr); | |
1000 | if (error) | |
1001 | goto out; | |
1002 | ||
1003 | if (attr->ia_valid & ATTR_SIZE) | |
1004 | error = setattr_size(inode, attr); | |
1005 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) | |
1006 | error = setattr_chown(inode, attr); | |
1007 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1008 | error = gfs2_acl_chmod(ip, attr); | |
1009 | else | |
1010 | error = gfs2_setattr_simple(ip, attr); | |
1011 | ||
a91ea69f | 1012 | out: |
b3b94faa | 1013 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1014 | if (!error) |
1015 | mark_inode_dirty(inode); | |
b3b94faa DT |
1016 | return error; |
1017 | } | |
1018 | ||
1019 | /** | |
1020 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1021 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1022 | * @dentry: The dentry to stat |
1023 | * @stat: The inode's stats | |
1024 | * | |
dcf3dd85 SW |
1025 | * This may be called from the VFS directly, or from within GFS2 with the |
1026 | * inode locked, so we look to see if the glock is already locked and only | |
1027 | * lock the glock if its not already been done. Note that its the NFS | |
1028 | * readdirplus operation which causes this to be called (from filldir) | |
1029 | * with the glock already held. | |
1030 | * | |
b3b94faa DT |
1031 | * Returns: errno |
1032 | */ | |
1033 | ||
1034 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1035 | struct kstat *stat) | |
1036 | { | |
1037 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1038 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1039 | struct gfs2_holder gh; |
1040 | int error; | |
dcf3dd85 | 1041 | int unlock = 0; |
b3b94faa | 1042 | |
dcf3dd85 SW |
1043 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) { |
1044 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
1045 | if (error) | |
1046 | return error; | |
1047 | unlock = 1; | |
b3b94faa DT |
1048 | } |
1049 | ||
dcf3dd85 | 1050 | generic_fillattr(inode, stat); |
d7c103d0 | 1051 | if (unlock) |
dcf3dd85 SW |
1052 | gfs2_glock_dq_uninit(&gh); |
1053 | ||
1054 | return 0; | |
b3b94faa DT |
1055 | } |
1056 | ||
1057 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1058 | const void *data, size_t size, int flags) | |
1059 | { | |
feaa7bba | 1060 | struct inode *inode = dentry->d_inode; |
b3b94faa DT |
1061 | struct gfs2_ea_request er; |
1062 | ||
b3b94faa DT |
1063 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1064 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1065 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1066 | return -EOPNOTSUPP; | |
1067 | er.er_data = (char *)data; | |
1068 | er.er_name_len = strlen(er.er_name); | |
1069 | er.er_data_len = size; | |
1070 | er.er_flags = flags; | |
1071 | ||
feaa7bba | 1072 | gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE)); |
b3b94faa | 1073 | |
feaa7bba | 1074 | return gfs2_ea_set(GFS2_I(inode), &er); |
b3b94faa DT |
1075 | } |
1076 | ||
1077 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1078 | void *data, size_t size) | |
1079 | { | |
1080 | struct gfs2_ea_request er; | |
1081 | ||
b3b94faa DT |
1082 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1083 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1084 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1085 | return -EOPNOTSUPP; | |
1086 | er.er_data = data; | |
1087 | er.er_name_len = strlen(er.er_name); | |
1088 | er.er_data_len = size; | |
1089 | ||
feaa7bba | 1090 | return gfs2_ea_get(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1091 | } |
1092 | ||
1093 | static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) | |
1094 | { | |
1095 | struct gfs2_ea_request er; | |
1096 | ||
b3b94faa DT |
1097 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1098 | er.er_data = (size) ? buffer : NULL; | |
1099 | er.er_data_len = size; | |
1100 | ||
feaa7bba | 1101 | return gfs2_ea_list(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1102 | } |
1103 | ||
1104 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1105 | { | |
1106 | struct gfs2_ea_request er; | |
1107 | ||
b3b94faa DT |
1108 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1109 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1110 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1111 | return -EOPNOTSUPP; | |
1112 | er.er_name_len = strlen(er.er_name); | |
1113 | ||
feaa7bba | 1114 | return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1115 | } |
1116 | ||
92e1d5be | 1117 | const struct inode_operations gfs2_file_iops = { |
b3b94faa DT |
1118 | .permission = gfs2_permission, |
1119 | .setattr = gfs2_setattr, | |
1120 | .getattr = gfs2_getattr, | |
1121 | .setxattr = gfs2_setxattr, | |
1122 | .getxattr = gfs2_getxattr, | |
1123 | .listxattr = gfs2_listxattr, | |
1124 | .removexattr = gfs2_removexattr, | |
1125 | }; | |
1126 | ||
92e1d5be | 1127 | const struct inode_operations gfs2_dev_iops = { |
b3b94faa DT |
1128 | .permission = gfs2_permission, |
1129 | .setattr = gfs2_setattr, | |
1130 | .getattr = gfs2_getattr, | |
1131 | .setxattr = gfs2_setxattr, | |
1132 | .getxattr = gfs2_getxattr, | |
1133 | .listxattr = gfs2_listxattr, | |
1134 | .removexattr = gfs2_removexattr, | |
1135 | }; | |
1136 | ||
92e1d5be | 1137 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1138 | .create = gfs2_create, |
1139 | .lookup = gfs2_lookup, | |
1140 | .link = gfs2_link, | |
1141 | .unlink = gfs2_unlink, | |
1142 | .symlink = gfs2_symlink, | |
1143 | .mkdir = gfs2_mkdir, | |
1144 | .rmdir = gfs2_rmdir, | |
1145 | .mknod = gfs2_mknod, | |
1146 | .rename = gfs2_rename, | |
1147 | .permission = gfs2_permission, | |
1148 | .setattr = gfs2_setattr, | |
1149 | .getattr = gfs2_getattr, | |
1150 | .setxattr = gfs2_setxattr, | |
1151 | .getxattr = gfs2_getxattr, | |
1152 | .listxattr = gfs2_listxattr, | |
1153 | .removexattr = gfs2_removexattr, | |
1154 | }; | |
1155 | ||
92e1d5be | 1156 | const struct inode_operations gfs2_symlink_iops = { |
b3b94faa DT |
1157 | .readlink = gfs2_readlink, |
1158 | .follow_link = gfs2_follow_link, | |
1159 | .permission = gfs2_permission, | |
1160 | .setattr = gfs2_setattr, | |
1161 | .getattr = gfs2_getattr, | |
1162 | .setxattr = gfs2_setxattr, | |
1163 | .getxattr = gfs2_getxattr, | |
1164 | .listxattr = gfs2_listxattr, | |
1165 | .removexattr = gfs2_removexattr, | |
1166 | }; | |
1167 |