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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> | |
b3b94faa DT |
15 | #include <linux/mm.h> |
16 | #include <linux/xattr.h> | |
17 | #include <linux/posix_acl.h> | |
5c676f6d | 18 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 19 | #include <linux/crc32.h> |
e9079cce | 20 | #include <linux/fiemap.h> |
3921120e BM |
21 | #include <linux/swap.h> |
22 | #include <linux/falloc.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" | |
307cf6e6 | 30 | #include "xattr.h" |
b3b94faa DT |
31 | #include "glock.h" |
32 | #include "inode.h" | |
33 | #include "meta_io.h" | |
b3b94faa DT |
34 | #include "quota.h" |
35 | #include "rgrp.h" | |
36 | #include "trans.h" | |
5c676f6d | 37 | #include "util.h" |
b2760583 | 38 | #include "super.h" |
b3b94faa DT |
39 | |
40 | /** | |
41 | * gfs2_create - Create a file | |
42 | * @dir: The directory in which to create the file | |
43 | * @dentry: The dentry of the new file | |
44 | * @mode: The mode of the new file | |
45 | * | |
46 | * Returns: errno | |
47 | */ | |
48 | ||
49 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
50 | int mode, struct nameidata *nd) | |
51 | { | |
feaa7bba SW |
52 | struct gfs2_inode *dip = GFS2_I(dir); |
53 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
54 | struct gfs2_holder ghs[2]; |
55 | struct inode *inode; | |
b3b94faa | 56 | |
b3b94faa DT |
57 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
58 | ||
59 | for (;;) { | |
e7f14f4d | 60 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0); |
7359a19c | 61 | if (!IS_ERR(inode)) { |
b3b94faa | 62 | gfs2_trans_end(sdp); |
6dbd8224 | 63 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
64 | gfs2_inplace_release(dip); |
65 | gfs2_quota_unlock(dip); | |
66 | gfs2_alloc_put(dip); | |
67 | gfs2_glock_dq_uninit_m(2, ghs); | |
3a8476dd | 68 | mark_inode_dirty(inode); |
b3b94faa | 69 | break; |
7359a19c | 70 | } else if (PTR_ERR(inode) != -EEXIST || |
3516586a | 71 | (nd && nd->flags & LOOKUP_EXCL)) { |
b3b94faa | 72 | gfs2_holder_uninit(ghs); |
7359a19c | 73 | return PTR_ERR(inode); |
b3b94faa DT |
74 | } |
75 | ||
a569c711 | 76 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); |
c752666c SW |
77 | if (inode) { |
78 | if (!IS_ERR(inode)) { | |
c752666c SW |
79 | gfs2_holder_uninit(ghs); |
80 | break; | |
81 | } else { | |
82 | gfs2_holder_uninit(ghs); | |
83 | return PTR_ERR(inode); | |
84 | } | |
b3b94faa DT |
85 | } |
86 | } | |
87 | ||
b3b94faa | 88 | d_instantiate(dentry, inode); |
b3b94faa DT |
89 | |
90 | return 0; | |
91 | } | |
92 | ||
93 | /** | |
94 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
95 | * @dir: The directory inode | |
96 | * @dentry: The dentry of the new inode | |
97 | * @nd: passed from Linux VFS, ignored by us | |
98 | * | |
99 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
100 | * | |
101 | * Returns: errno | |
102 | */ | |
103 | ||
104 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
105 | struct nameidata *nd) | |
106 | { | |
b3b94faa | 107 | struct inode *inode = NULL; |
b3b94faa | 108 | |
c752666c | 109 | dentry->d_op = &gfs2_dops; |
b3b94faa | 110 | |
a569c711 | 111 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); |
c752666c | 112 | if (inode && IS_ERR(inode)) |
e231c2ee | 113 | return ERR_CAST(inode); |
b3b94faa | 114 | |
9656b2c1 SW |
115 | if (inode) { |
116 | struct gfs2_glock *gl = GFS2_I(inode)->i_gl; | |
117 | struct gfs2_holder gh; | |
118 | int error; | |
119 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
120 | if (error) { | |
121 | iput(inode); | |
122 | return ERR_PTR(error); | |
123 | } | |
124 | gfs2_glock_dq_uninit(&gh); | |
b3b94faa | 125 | return d_splice_alias(inode, dentry); |
9656b2c1 | 126 | } |
b3b94faa DT |
127 | d_add(dentry, inode); |
128 | ||
129 | return NULL; | |
130 | } | |
131 | ||
132 | /** | |
133 | * gfs2_link - Link to a file | |
134 | * @old_dentry: The inode to link | |
135 | * @dir: Add link to this directory | |
136 | * @dentry: The name of the link | |
137 | * | |
138 | * Link the inode in "old_dentry" into the directory "dir" with the | |
139 | * name in "dentry". | |
140 | * | |
141 | * Returns: errno | |
142 | */ | |
143 | ||
144 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
145 | struct dentry *dentry) | |
146 | { | |
feaa7bba SW |
147 | struct gfs2_inode *dip = GFS2_I(dir); |
148 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa | 149 | struct inode *inode = old_dentry->d_inode; |
feaa7bba | 150 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
151 | struct gfs2_holder ghs[2]; |
152 | int alloc_required; | |
153 | int error; | |
154 | ||
b60623c2 | 155 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
156 | return -EPERM; |
157 | ||
158 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
159 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
160 | ||
72dbf479 BP |
161 | error = gfs2_glock_nq(ghs); /* parent */ |
162 | if (error) | |
163 | goto out_parent; | |
164 | ||
165 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 166 | if (error) |
72dbf479 | 167 | goto out_child; |
b3b94faa | 168 | |
f58ba889 | 169 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
170 | if (error) |
171 | goto out_gunlock; | |
172 | ||
dbb7cae2 | 173 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
174 | switch (error) { |
175 | case -ENOENT: | |
176 | break; | |
177 | case 0: | |
178 | error = -EEXIST; | |
179 | default: | |
180 | goto out_gunlock; | |
181 | } | |
182 | ||
183 | error = -EINVAL; | |
4f56110a | 184 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
185 | goto out_gunlock; |
186 | error = -EFBIG; | |
ad6203f2 | 187 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
188 | goto out_gunlock; |
189 | error = -EPERM; | |
190 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
191 | goto out_gunlock; | |
192 | error = -EINVAL; | |
4f56110a | 193 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
194 | goto out_gunlock; |
195 | error = -EMLINK; | |
4f56110a | 196 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
197 | goto out_gunlock; |
198 | ||
c752666c SW |
199 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); |
200 | if (error < 0) | |
b3b94faa | 201 | goto out_gunlock; |
c752666c | 202 | error = 0; |
b3b94faa DT |
203 | |
204 | if (alloc_required) { | |
205 | struct gfs2_alloc *al = gfs2_alloc_get(dip); | |
182fe5ab CG |
206 | if (!al) { |
207 | error = -ENOMEM; | |
208 | goto out_gunlock; | |
209 | } | |
b3b94faa | 210 | |
d82661d9 | 211 | error = gfs2_quota_lock_check(dip); |
b3b94faa DT |
212 | if (error) |
213 | goto out_alloc; | |
214 | ||
b3b94faa DT |
215 | al->al_requested = sdp->sd_max_dirres; |
216 | ||
217 | error = gfs2_inplace_reserve(dip); | |
218 | if (error) | |
219 | goto out_gunlock_q; | |
220 | ||
1b50259b | 221 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 222 | al->al_rgd->rd_length + |
b3b94faa DT |
223 | 2 * RES_DINODE + RES_STATFS + |
224 | RES_QUOTA, 0); | |
225 | if (error) | |
226 | goto out_ipres; | |
227 | } else { | |
228 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
229 | if (error) | |
230 | goto out_ipres; | |
231 | } | |
232 | ||
dbb7cae2 | 233 | error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode)); |
b3b94faa DT |
234 | if (error) |
235 | goto out_end_trans; | |
236 | ||
237 | error = gfs2_change_nlink(ip, +1); | |
238 | ||
feaa7bba | 239 | out_end_trans: |
b3b94faa | 240 | gfs2_trans_end(sdp); |
feaa7bba | 241 | out_ipres: |
b3b94faa DT |
242 | if (alloc_required) |
243 | gfs2_inplace_release(dip); | |
feaa7bba | 244 | out_gunlock_q: |
b3b94faa DT |
245 | if (alloc_required) |
246 | gfs2_quota_unlock(dip); | |
feaa7bba | 247 | out_alloc: |
b3b94faa DT |
248 | if (alloc_required) |
249 | gfs2_alloc_put(dip); | |
feaa7bba | 250 | out_gunlock: |
72dbf479 BP |
251 | gfs2_glock_dq(ghs + 1); |
252 | out_child: | |
253 | gfs2_glock_dq(ghs); | |
254 | out_parent: | |
b3b94faa DT |
255 | gfs2_holder_uninit(ghs); |
256 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa | 257 | if (!error) { |
29937ac6 | 258 | atomic_inc(&inode->i_count); |
b3b94faa DT |
259 | d_instantiate(dentry, inode); |
260 | mark_inode_dirty(inode); | |
261 | } | |
b3b94faa DT |
262 | return error; |
263 | } | |
264 | ||
87ec2174 SW |
265 | /* |
266 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
267 | * @dip: the directory | |
268 | * @name: the name of the file | |
269 | * @ip: the inode | |
270 | * | |
271 | * Assumes that the lock on (at least) @dip is held. | |
272 | * | |
273 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
274 | */ | |
275 | ||
276 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
277 | const struct gfs2_inode *ip) | |
278 | { | |
279 | int error; | |
280 | ||
281 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
282 | return -EPERM; | |
283 | ||
284 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
285 | dip->i_inode.i_uid != current_fsuid() && | |
286 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
287 | return -EPERM; | |
288 | ||
289 | if (IS_APPEND(&dip->i_inode)) | |
290 | return -EPERM; | |
291 | ||
292 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); | |
293 | if (error) | |
294 | return error; | |
295 | ||
296 | error = gfs2_dir_check(&dip->i_inode, name, ip); | |
297 | if (error) | |
298 | return error; | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
b3b94faa DT |
303 | /** |
304 | * gfs2_unlink - Unlink a file | |
305 | * @dir: The inode of the directory containing the file to unlink | |
306 | * @dentry: The file itself | |
307 | * | |
308 | * Unlink a file. Call gfs2_unlinki() | |
309 | * | |
310 | * Returns: errno | |
311 | */ | |
312 | ||
313 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
314 | { | |
feaa7bba SW |
315 | struct gfs2_inode *dip = GFS2_I(dir); |
316 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
317 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
318 | struct gfs2_holder ghs[3]; |
319 | struct gfs2_rgrpd *rgd; | |
320 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
321 | int error; |
322 | ||
ddee7608 RC |
323 | error = gfs2_rindex_hold(sdp, &ri_gh); |
324 | if (error) | |
325 | return error; | |
326 | ||
b3b94faa | 327 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 328 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 329 | |
dbb7cae2 | 330 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
331 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
332 | ||
333 | ||
8497a46e | 334 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 335 | if (error) |
8497a46e SW |
336 | goto out_parent; |
337 | ||
338 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
339 | if (error) | |
340 | goto out_child; | |
341 | ||
342 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ | |
343 | if (error) | |
344 | goto out_rgrp; | |
b3b94faa DT |
345 | |
346 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
347 | if (error) | |
72dbf479 | 348 | goto out_gunlock; |
b3b94faa | 349 | |
feaa7bba | 350 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); |
b3b94faa | 351 | if (error) |
cd012075 | 352 | goto out_gunlock; |
b3b94faa | 353 | |
feaa7bba SW |
354 | error = gfs2_dir_del(dip, &dentry->d_name); |
355 | if (error) | |
356 | goto out_end_trans; | |
b3b94faa | 357 | |
feaa7bba | 358 | error = gfs2_change_nlink(ip, -1); |
b3b94faa | 359 | |
feaa7bba SW |
360 | out_end_trans: |
361 | gfs2_trans_end(sdp); | |
72dbf479 | 362 | out_gunlock: |
8497a46e SW |
363 | gfs2_glock_dq(ghs + 2); |
364 | out_rgrp: | |
ddee7608 | 365 | gfs2_holder_uninit(ghs + 2); |
8497a46e SW |
366 | gfs2_glock_dq(ghs + 1); |
367 | out_child: | |
368 | gfs2_holder_uninit(ghs + 1); | |
369 | gfs2_glock_dq(ghs); | |
370 | out_parent: | |
371 | gfs2_holder_uninit(ghs); | |
ddee7608 | 372 | gfs2_glock_dq_uninit(&ri_gh); |
b3b94faa DT |
373 | return error; |
374 | } | |
375 | ||
376 | /** | |
377 | * gfs2_symlink - Create a symlink | |
378 | * @dir: The directory to create the symlink in | |
379 | * @dentry: The dentry to put the symlink in | |
380 | * @symname: The thing which the link points to | |
381 | * | |
382 | * Returns: errno | |
383 | */ | |
384 | ||
385 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
386 | const char *symname) | |
387 | { | |
feaa7bba SW |
388 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
389 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
390 | struct gfs2_holder ghs[2]; |
391 | struct inode *inode; | |
392 | struct buffer_head *dibh; | |
393 | int size; | |
394 | int error; | |
395 | ||
b3b94faa DT |
396 | /* Must be stuffed with a null terminator for gfs2_follow_link() */ |
397 | size = strlen(symname); | |
398 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
399 | return -ENAMETOOLONG; | |
400 | ||
401 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
402 | ||
e7f14f4d | 403 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0); |
7359a19c | 404 | if (IS_ERR(inode)) { |
b3b94faa | 405 | gfs2_holder_uninit(ghs); |
7359a19c | 406 | return PTR_ERR(inode); |
b3b94faa DT |
407 | } |
408 | ||
5c676f6d | 409 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa | 410 | |
5cf32524 | 411 | i_size_write(inode, size); |
b3b94faa DT |
412 | |
413 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
414 | ||
415 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
539e5d6b | 416 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
417 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, |
418 | size); | |
419 | brelse(dibh); | |
420 | } | |
421 | ||
422 | gfs2_trans_end(sdp); | |
6dbd8224 | 423 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
424 | gfs2_inplace_release(dip); |
425 | gfs2_quota_unlock(dip); | |
426 | gfs2_alloc_put(dip); | |
427 | ||
428 | gfs2_glock_dq_uninit_m(2, ghs); | |
429 | ||
b3b94faa DT |
430 | d_instantiate(dentry, inode); |
431 | mark_inode_dirty(inode); | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | /** | |
437 | * gfs2_mkdir - Make a directory | |
438 | * @dir: The parent directory of the new one | |
439 | * @dentry: The dentry of the new directory | |
440 | * @mode: The mode of the new directory | |
441 | * | |
442 | * Returns: errno | |
443 | */ | |
444 | ||
445 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
446 | { | |
feaa7bba SW |
447 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
448 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
449 | struct gfs2_holder ghs[2]; |
450 | struct inode *inode; | |
451 | struct buffer_head *dibh; | |
452 | int error; | |
453 | ||
b3b94faa DT |
454 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
455 | ||
e7f14f4d | 456 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0); |
7359a19c | 457 | if (IS_ERR(inode)) { |
b3b94faa | 458 | gfs2_holder_uninit(ghs); |
7359a19c | 459 | return PTR_ERR(inode); |
b3b94faa DT |
460 | } |
461 | ||
5c676f6d | 462 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa | 463 | |
4f56110a | 464 | ip->i_inode.i_nlink = 2; |
a2e0f799 | 465 | i_size_write(inode, sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)); |
383f01fb | 466 | ip->i_diskflags |= GFS2_DIF_JDATA; |
ad6203f2 | 467 | ip->i_entries = 2; |
b3b94faa DT |
468 | |
469 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
470 | ||
471 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
472 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
c752666c | 473 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); |
71b86f56 | 474 | struct qstr str; |
b3b94faa | 475 | |
71b86f56 | 476 | gfs2_str2qstr(&str, "."); |
c752666c SW |
477 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
478 | gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent); | |
b3b94faa | 479 | dent->de_inum = di->di_num; /* already GFS2 endian */ |
7ecdb70a | 480 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa DT |
481 | di->di_entries = cpu_to_be32(1); |
482 | ||
71b86f56 | 483 | gfs2_str2qstr(&str, ".."); |
c752666c SW |
484 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); |
485 | gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
b3b94faa | 486 | |
dbb7cae2 | 487 | gfs2_inum_out(dip, dent); |
7ecdb70a | 488 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa | 489 | |
539e5d6b | 490 | gfs2_dinode_out(ip, di); |
b3b94faa DT |
491 | |
492 | brelse(dibh); | |
493 | } | |
494 | ||
495 | error = gfs2_change_nlink(dip, +1); | |
496 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ | |
497 | ||
498 | gfs2_trans_end(sdp); | |
6dbd8224 | 499 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
500 | gfs2_inplace_release(dip); |
501 | gfs2_quota_unlock(dip); | |
502 | gfs2_alloc_put(dip); | |
503 | ||
504 | gfs2_glock_dq_uninit_m(2, ghs); | |
505 | ||
b3b94faa DT |
506 | d_instantiate(dentry, inode); |
507 | mark_inode_dirty(inode); | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
2286dbfa SW |
512 | /** |
513 | * gfs2_rmdiri - Remove a directory | |
514 | * @dip: The parent directory of the directory to be removed | |
515 | * @name: The name of the directory to be removed | |
516 | * @ip: The GFS2 inode of the directory to be removed | |
517 | * | |
518 | * Assumes Glocks on dip and ip are held | |
519 | * | |
520 | * Returns: errno | |
521 | */ | |
522 | ||
523 | static int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, | |
524 | struct gfs2_inode *ip) | |
525 | { | |
526 | struct qstr dotname; | |
527 | int error; | |
528 | ||
529 | if (ip->i_entries != 2) { | |
530 | if (gfs2_consist_inode(ip)) | |
531 | gfs2_dinode_print(ip); | |
532 | return -EIO; | |
533 | } | |
534 | ||
535 | error = gfs2_dir_del(dip, name); | |
536 | if (error) | |
537 | return error; | |
538 | ||
539 | error = gfs2_change_nlink(dip, -1); | |
540 | if (error) | |
541 | return error; | |
542 | ||
543 | gfs2_str2qstr(&dotname, "."); | |
544 | error = gfs2_dir_del(ip, &dotname); | |
545 | if (error) | |
546 | return error; | |
547 | ||
548 | gfs2_str2qstr(&dotname, ".."); | |
549 | error = gfs2_dir_del(ip, &dotname); | |
550 | if (error) | |
551 | return error; | |
552 | ||
553 | /* It looks odd, but it really should be done twice */ | |
554 | error = gfs2_change_nlink(ip, -1); | |
555 | if (error) | |
556 | return error; | |
557 | ||
558 | error = gfs2_change_nlink(ip, -1); | |
559 | if (error) | |
560 | return error; | |
561 | ||
562 | return error; | |
563 | } | |
564 | ||
b3b94faa DT |
565 | /** |
566 | * gfs2_rmdir - Remove a directory | |
567 | * @dir: The parent directory of the directory to be removed | |
568 | * @dentry: The dentry of the directory to remove | |
569 | * | |
570 | * Remove a directory. Call gfs2_rmdiri() | |
571 | * | |
572 | * Returns: errno | |
573 | */ | |
574 | ||
575 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) | |
576 | { | |
feaa7bba SW |
577 | struct gfs2_inode *dip = GFS2_I(dir); |
578 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
579 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
580 | struct gfs2_holder ghs[3]; |
581 | struct gfs2_rgrpd *rgd; | |
582 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
583 | int error; |
584 | ||
ddee7608 RC |
585 | error = gfs2_rindex_hold(sdp, &ri_gh); |
586 | if (error) | |
587 | return error; | |
b3b94faa DT |
588 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
589 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
590 | ||
dbb7cae2 | 591 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
592 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
593 | ||
72dbf479 BP |
594 | error = gfs2_glock_nq(ghs); /* parent */ |
595 | if (error) | |
596 | goto out_parent; | |
597 | ||
598 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 599 | if (error) |
72dbf479 BP |
600 | goto out_child; |
601 | ||
602 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ | |
603 | if (error) | |
604 | goto out_rgrp; | |
b3b94faa DT |
605 | |
606 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
607 | if (error) | |
608 | goto out_gunlock; | |
609 | ||
ad6203f2 | 610 | if (ip->i_entries < 2) { |
b3b94faa | 611 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 612 | gfs2_dinode_print(ip); |
b3b94faa DT |
613 | error = -EIO; |
614 | goto out_gunlock; | |
615 | } | |
ad6203f2 | 616 | if (ip->i_entries > 2) { |
b3b94faa DT |
617 | error = -ENOTEMPTY; |
618 | goto out_gunlock; | |
619 | } | |
620 | ||
feaa7bba | 621 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
622 | if (error) |
623 | goto out_gunlock; | |
624 | ||
feaa7bba | 625 | error = gfs2_rmdiri(dip, &dentry->d_name, ip); |
b3b94faa DT |
626 | |
627 | gfs2_trans_end(sdp); | |
628 | ||
a91ea69f | 629 | out_gunlock: |
72dbf479 BP |
630 | gfs2_glock_dq(ghs + 2); |
631 | out_rgrp: | |
ddee7608 | 632 | gfs2_holder_uninit(ghs + 2); |
72dbf479 BP |
633 | gfs2_glock_dq(ghs + 1); |
634 | out_child: | |
635 | gfs2_holder_uninit(ghs + 1); | |
636 | gfs2_glock_dq(ghs); | |
637 | out_parent: | |
638 | gfs2_holder_uninit(ghs); | |
ddee7608 | 639 | gfs2_glock_dq_uninit(&ri_gh); |
b3b94faa DT |
640 | return error; |
641 | } | |
642 | ||
643 | /** | |
644 | * gfs2_mknod - Make a special file | |
645 | * @dir: The directory in which the special file will reside | |
646 | * @dentry: The dentry of the special file | |
647 | * @mode: The mode of the special file | |
648 | * @rdev: The device specification of the special file | |
649 | * | |
650 | */ | |
651 | ||
652 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
653 | dev_t dev) | |
654 | { | |
e7f14f4d | 655 | struct gfs2_inode *dip = GFS2_I(dir); |
feaa7bba | 656 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
b3b94faa DT |
657 | struct gfs2_holder ghs[2]; |
658 | struct inode *inode; | |
b3b94faa DT |
659 | |
660 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
661 | ||
e7f14f4d | 662 | inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); |
7359a19c | 663 | if (IS_ERR(inode)) { |
b3b94faa | 664 | gfs2_holder_uninit(ghs); |
7359a19c | 665 | return PTR_ERR(inode); |
b3b94faa DT |
666 | } |
667 | ||
b3b94faa | 668 | gfs2_trans_end(sdp); |
6dbd8224 | 669 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
670 | gfs2_inplace_release(dip); |
671 | gfs2_quota_unlock(dip); | |
672 | gfs2_alloc_put(dip); | |
673 | ||
674 | gfs2_glock_dq_uninit_m(2, ghs); | |
675 | ||
b3b94faa DT |
676 | d_instantiate(dentry, inode); |
677 | mark_inode_dirty(inode); | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
0188d6c5 SW |
682 | /* |
683 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
684 | * @this: move this | |
685 | * @to: to here | |
686 | * | |
687 | * Follow @to back to the root and make sure we don't encounter @this | |
688 | * Assumes we already hold the rename lock. | |
689 | * | |
690 | * Returns: errno | |
691 | */ | |
692 | ||
693 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
694 | { | |
695 | struct inode *dir = &to->i_inode; | |
696 | struct super_block *sb = dir->i_sb; | |
697 | struct inode *tmp; | |
698 | struct qstr dotdot; | |
699 | int error = 0; | |
700 | ||
701 | gfs2_str2qstr(&dotdot, ".."); | |
702 | ||
703 | igrab(dir); | |
704 | ||
705 | for (;;) { | |
706 | if (dir == &this->i_inode) { | |
707 | error = -EINVAL; | |
708 | break; | |
709 | } | |
710 | if (dir == sb->s_root->d_inode) { | |
711 | error = 0; | |
712 | break; | |
713 | } | |
714 | ||
715 | tmp = gfs2_lookupi(dir, &dotdot, 1); | |
716 | if (IS_ERR(tmp)) { | |
717 | error = PTR_ERR(tmp); | |
718 | break; | |
719 | } | |
720 | ||
721 | iput(dir); | |
722 | dir = tmp; | |
723 | } | |
724 | ||
725 | iput(dir); | |
726 | ||
727 | return error; | |
728 | } | |
729 | ||
b3b94faa DT |
730 | /** |
731 | * gfs2_rename - Rename a file | |
732 | * @odir: Parent directory of old file name | |
733 | * @odentry: The old dentry of the file | |
734 | * @ndir: Parent directory of new file name | |
735 | * @ndentry: The new dentry of the file | |
736 | * | |
737 | * Returns: errno | |
738 | */ | |
739 | ||
740 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
741 | struct inode *ndir, struct dentry *ndentry) | |
742 | { | |
feaa7bba SW |
743 | struct gfs2_inode *odip = GFS2_I(odir); |
744 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
745 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 746 | struct gfs2_inode *nip = NULL; |
feaa7bba | 747 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
0188d6c5 | 748 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; |
ddee7608 | 749 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
750 | unsigned int num_gh; |
751 | int dir_rename = 0; | |
24b977b5 | 752 | int alloc_required = 0; |
b3b94faa DT |
753 | unsigned int x; |
754 | int error; | |
755 | ||
b3b94faa | 756 | if (ndentry->d_inode) { |
feaa7bba | 757 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
758 | if (ip == nip) |
759 | return 0; | |
760 | } | |
761 | ||
b3b94faa | 762 | |
0188d6c5 SW |
763 | if (odip != ndip) { |
764 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
765 | 0, &r_gh); | |
b3b94faa DT |
766 | if (error) |
767 | goto out; | |
768 | ||
0188d6c5 SW |
769 | if (S_ISDIR(ip->i_inode.i_mode)) { |
770 | dir_rename = 1; | |
771 | /* don't move a dirctory into it's subdir */ | |
772 | error = gfs2_ok_to_move(ip, ndip); | |
773 | if (error) | |
774 | goto out_gunlock_r; | |
775 | } | |
b3b94faa DT |
776 | } |
777 | ||
d9d1ca30 | 778 | num_gh = 1; |
b3b94faa | 779 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
780 | if (odip != ndip) { |
781 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
782 | num_gh++; | |
783 | } | |
784 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
785 | num_gh++; | |
b3b94faa | 786 | |
d9d1ca30 SW |
787 | if (nip) { |
788 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
789 | num_gh++; | |
ddee7608 RC |
790 | /* grab the resource lock for unlink flag twiddling |
791 | * this is the case of the target file already existing | |
792 | * so we unlink before doing the rename | |
793 | */ | |
dbb7cae2 | 794 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); |
ddee7608 RC |
795 | if (nrgd) |
796 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 797 | } |
b3b94faa | 798 | |
72dbf479 BP |
799 | for (x = 0; x < num_gh; x++) { |
800 | error = gfs2_glock_nq(ghs + x); | |
801 | if (error) | |
802 | goto out_gunlock; | |
803 | } | |
b3b94faa DT |
804 | |
805 | /* Check out the old directory */ | |
806 | ||
807 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
808 | if (error) | |
809 | goto out_gunlock; | |
810 | ||
811 | /* Check out the new directory */ | |
812 | ||
813 | if (nip) { | |
814 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
815 | if (error) | |
816 | goto out_gunlock; | |
817 | ||
b60623c2 | 818 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 819 | if (nip->i_entries < 2) { |
b3b94faa | 820 | if (gfs2_consist_inode(nip)) |
4cc14f0b | 821 | gfs2_dinode_print(nip); |
b3b94faa DT |
822 | error = -EIO; |
823 | goto out_gunlock; | |
824 | } | |
ad6203f2 | 825 | if (nip->i_entries > 2) { |
b3b94faa DT |
826 | error = -ENOTEMPTY; |
827 | goto out_gunlock; | |
828 | } | |
829 | } | |
830 | } else { | |
f58ba889 | 831 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
832 | if (error) |
833 | goto out_gunlock; | |
834 | ||
dbb7cae2 | 835 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
836 | switch (error) { |
837 | case -ENOENT: | |
838 | error = 0; | |
839 | break; | |
840 | case 0: | |
841 | error = -EEXIST; | |
842 | default: | |
843 | goto out_gunlock; | |
844 | }; | |
845 | ||
846 | if (odip != ndip) { | |
4f56110a | 847 | if (!ndip->i_inode.i_nlink) { |
b3b94faa DT |
848 | error = -EINVAL; |
849 | goto out_gunlock; | |
850 | } | |
ad6203f2 | 851 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
852 | error = -EFBIG; |
853 | goto out_gunlock; | |
854 | } | |
b60623c2 | 855 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 856 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
857 | error = -EMLINK; |
858 | goto out_gunlock; | |
859 | } | |
860 | } | |
861 | } | |
862 | ||
863 | /* Check out the dir to be renamed */ | |
864 | ||
865 | if (dir_rename) { | |
f58ba889 | 866 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); |
b3b94faa DT |
867 | if (error) |
868 | goto out_gunlock; | |
869 | } | |
870 | ||
24b977b5 SW |
871 | if (nip == NULL) |
872 | alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); | |
873 | error = alloc_required; | |
c752666c | 874 | if (error < 0) |
b3b94faa | 875 | goto out_gunlock; |
c752666c | 876 | error = 0; |
b3b94faa DT |
877 | |
878 | if (alloc_required) { | |
879 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
182fe5ab CG |
880 | if (!al) { |
881 | error = -ENOMEM; | |
882 | goto out_gunlock; | |
883 | } | |
b3b94faa | 884 | |
d82661d9 | 885 | error = gfs2_quota_lock_check(ndip); |
b3b94faa DT |
886 | if (error) |
887 | goto out_alloc; | |
888 | ||
b3b94faa DT |
889 | al->al_requested = sdp->sd_max_dirres; |
890 | ||
891 | error = gfs2_inplace_reserve(ndip); | |
892 | if (error) | |
893 | goto out_gunlock_q; | |
894 | ||
fe1bdedc | 895 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 896 | al->al_rgd->rd_length + |
b3b94faa | 897 | 4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07 | 898 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
899 | if (error) |
900 | goto out_ipreserv; | |
901 | } else { | |
902 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 903 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
904 | if (error) |
905 | goto out_gunlock; | |
906 | } | |
907 | ||
908 | /* Remove the target file, if it exists */ | |
909 | ||
910 | if (nip) { | |
b60623c2 | 911 | if (S_ISDIR(nip->i_inode.i_mode)) |
feaa7bba SW |
912 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); |
913 | else { | |
914 | error = gfs2_dir_del(ndip, &ndentry->d_name); | |
915 | if (error) | |
916 | goto out_end_trans; | |
87d21e07 | 917 | error = gfs2_change_nlink(nip, -1); |
feaa7bba | 918 | } |
b3b94faa DT |
919 | if (error) |
920 | goto out_end_trans; | |
921 | } | |
922 | ||
923 | if (dir_rename) { | |
924 | struct qstr name; | |
71b86f56 | 925 | gfs2_str2qstr(&name, ".."); |
b3b94faa DT |
926 | |
927 | error = gfs2_change_nlink(ndip, +1); | |
928 | if (error) | |
929 | goto out_end_trans; | |
930 | error = gfs2_change_nlink(odip, -1); | |
931 | if (error) | |
932 | goto out_end_trans; | |
933 | ||
ffed8ab3 | 934 | error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR); |
b3b94faa DT |
935 | if (error) |
936 | goto out_end_trans; | |
937 | } else { | |
938 | struct buffer_head *dibh; | |
939 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
940 | if (error) | |
941 | goto out_end_trans; | |
4bd91ba1 | 942 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 943 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 944 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
945 | brelse(dibh); |
946 | } | |
947 | ||
948 | error = gfs2_dir_del(odip, &odentry->d_name); | |
949 | if (error) | |
950 | goto out_end_trans; | |
951 | ||
dbb7cae2 | 952 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
953 | if (error) |
954 | goto out_end_trans; | |
955 | ||
feaa7bba | 956 | out_end_trans: |
b3b94faa | 957 | gfs2_trans_end(sdp); |
feaa7bba | 958 | out_ipreserv: |
b3b94faa DT |
959 | if (alloc_required) |
960 | gfs2_inplace_release(ndip); | |
feaa7bba | 961 | out_gunlock_q: |
b3b94faa DT |
962 | if (alloc_required) |
963 | gfs2_quota_unlock(ndip); | |
feaa7bba | 964 | out_alloc: |
b3b94faa DT |
965 | if (alloc_required) |
966 | gfs2_alloc_put(ndip); | |
feaa7bba | 967 | out_gunlock: |
72dbf479 BP |
968 | while (x--) { |
969 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 970 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 971 | } |
feaa7bba | 972 | out_gunlock_r: |
0188d6c5 | 973 | if (r_gh.gh_gl) |
b3b94faa | 974 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 975 | out: |
b3b94faa DT |
976 | return error; |
977 | } | |
978 | ||
536baf02 | 979 | /** |
c177c2ac AV |
980 | * gfs2_follow_link - Follow a symbolic link |
981 | * @dentry: The dentry of the link | |
982 | * @nd: Data that we pass to vfs_follow_link() | |
536baf02 | 983 | * |
c177c2ac | 984 | * This can handle symlinks of any size. |
536baf02 | 985 | * |
c177c2ac | 986 | * Returns: 0 on success or error code |
536baf02 SW |
987 | */ |
988 | ||
c177c2ac | 989 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) |
536baf02 | 990 | { |
c177c2ac | 991 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
536baf02 SW |
992 | struct gfs2_holder i_gh; |
993 | struct buffer_head *dibh; | |
a2e0f799 | 994 | unsigned int x, size; |
c177c2ac | 995 | char *buf; |
536baf02 SW |
996 | int error; |
997 | ||
998 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); | |
999 | error = gfs2_glock_nq(&i_gh); | |
1000 | if (error) { | |
1001 | gfs2_holder_uninit(&i_gh); | |
c177c2ac AV |
1002 | nd_set_link(nd, ERR_PTR(error)); |
1003 | return NULL; | |
536baf02 SW |
1004 | } |
1005 | ||
a2e0f799 SW |
1006 | size = (unsigned int)i_size_read(&ip->i_inode); |
1007 | if (size == 0) { | |
536baf02 | 1008 | gfs2_consist_inode(ip); |
c177c2ac | 1009 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1010 | goto out; |
1011 | } | |
1012 | ||
1013 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1014 | if (error) { |
1015 | buf = ERR_PTR(error); | |
536baf02 | 1016 | goto out; |
536baf02 SW |
1017 | } |
1018 | ||
a2e0f799 | 1019 | x = size + 1; |
c177c2ac AV |
1020 | buf = kmalloc(x, GFP_NOFS); |
1021 | if (!buf) | |
1022 | buf = ERR_PTR(-ENOMEM); | |
1023 | else | |
1024 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
536baf02 SW |
1025 | brelse(dibh); |
1026 | out: | |
1027 | gfs2_glock_dq_uninit(&i_gh); | |
c177c2ac AV |
1028 | nd_set_link(nd, buf); |
1029 | return NULL; | |
b3b94faa DT |
1030 | } |
1031 | ||
c177c2ac | 1032 | static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
b3b94faa | 1033 | { |
c177c2ac AV |
1034 | char *s = nd_get_link(nd); |
1035 | if (!IS_ERR(s)) | |
1036 | kfree(s); | |
b3b94faa DT |
1037 | } |
1038 | ||
1039 | /** | |
1040 | * gfs2_permission - | |
1041 | * @inode: | |
1042 | * @mask: | |
1043 | * @nd: passed from Linux VFS, ignored by us | |
1044 | * | |
300c7d75 SW |
1045 | * This may be called from the VFS directly, or from within GFS2 with the |
1046 | * inode locked, so we look to see if the glock is already locked and only | |
1047 | * lock the glock if its not already been done. | |
1048 | * | |
b3b94faa DT |
1049 | * Returns: errno |
1050 | */ | |
1051 | ||
f58ba889 | 1052 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1053 | { |
feaa7bba | 1054 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1055 | struct gfs2_holder i_gh; |
1056 | int error; | |
300c7d75 | 1057 | int unlock = 0; |
b3b94faa | 1058 | |
7afd88d9 | 1059 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
300c7d75 SW |
1060 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
1061 | if (error) | |
1062 | return error; | |
1063 | unlock = 1; | |
1064 | } | |
b3b94faa | 1065 | |
f58ba889 MS |
1066 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
1067 | error = -EACCES; | |
1068 | else | |
1069 | error = generic_permission(inode, mask, gfs2_check_acl); | |
300c7d75 | 1070 | if (unlock) |
b3b94faa | 1071 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1072 | |
1073 | return error; | |
1074 | } | |
1075 | ||
b3b94faa DT |
1076 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1077 | { | |
feaa7bba SW |
1078 | struct gfs2_inode *ip = GFS2_I(inode); |
1079 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
b3b94faa | 1080 | struct buffer_head *dibh; |
cd915493 | 1081 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
1082 | int error; |
1083 | ||
2933f925 SW |
1084 | ouid = inode->i_uid; |
1085 | ogid = inode->i_gid; | |
b3b94faa DT |
1086 | nuid = attr->ia_uid; |
1087 | ngid = attr->ia_gid; | |
1088 | ||
1089 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
1090 | ouid = nuid = NO_QUOTA_CHANGE; | |
1091 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
1092 | ogid = ngid = NO_QUOTA_CHANGE; | |
1093 | ||
182fe5ab CG |
1094 | if (!gfs2_alloc_get(ip)) |
1095 | return -ENOMEM; | |
b3b94faa DT |
1096 | |
1097 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1098 | if (error) | |
1099 | goto out_alloc; | |
1100 | ||
1101 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
1102 | error = gfs2_quota_check(ip, nuid, ngid); | |
1103 | if (error) | |
1104 | goto out_gunlock_q; | |
1105 | } | |
1106 | ||
1107 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1108 | if (error) | |
1109 | goto out_gunlock_q; | |
1110 | ||
1111 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1112 | if (error) | |
1113 | goto out_end_trans; | |
1114 | ||
1025774c CH |
1115 | if ((attr->ia_valid & ATTR_SIZE) && |
1116 | attr->ia_size != i_size_read(inode)) { | |
1117 | int error; | |
1118 | ||
1119 | error = vmtruncate(inode, attr->ia_size); | |
1120 | gfs2_assert_warn(sdp, !error); | |
1121 | } | |
1122 | ||
1123 | setattr_copy(inode, attr); | |
1124 | mark_inode_dirty(inode); | |
b3b94faa | 1125 | |
d4e9c4c3 | 1126 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1127 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1128 | brelse(dibh); |
1129 | ||
1130 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
77658aad SW |
1131 | u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); |
1132 | gfs2_quota_change(ip, -blocks, ouid, ogid); | |
1133 | gfs2_quota_change(ip, blocks, nuid, ngid); | |
b3b94faa DT |
1134 | } |
1135 | ||
a91ea69f | 1136 | out_end_trans: |
b3b94faa | 1137 | gfs2_trans_end(sdp); |
a91ea69f | 1138 | out_gunlock_q: |
b3b94faa | 1139 | gfs2_quota_unlock(ip); |
a91ea69f | 1140 | out_alloc: |
b3b94faa | 1141 | gfs2_alloc_put(ip); |
b3b94faa DT |
1142 | return error; |
1143 | } | |
1144 | ||
1145 | /** | |
1146 | * gfs2_setattr - Change attributes on an inode | |
1147 | * @dentry: The dentry which is changing | |
1148 | * @attr: The structure describing the change | |
1149 | * | |
1150 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1151 | * that change out to disk. | |
1152 | * | |
1153 | * Returns: errno | |
1154 | */ | |
1155 | ||
1156 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1157 | { | |
1158 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1159 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1160 | struct gfs2_holder i_gh; |
1161 | int error; | |
1162 | ||
b3b94faa DT |
1163 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1164 | if (error) | |
1165 | return error; | |
1166 | ||
1167 | error = -EPERM; | |
1168 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1169 | goto out; | |
1170 | ||
1171 | error = inode_change_ok(inode, attr); | |
1172 | if (error) | |
1173 | goto out; | |
1174 | ||
1175 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1176 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1177 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1178 | error = setattr_chown(inode, attr); | |
1179 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1180 | error = gfs2_acl_chmod(ip, attr); | |
1181 | else | |
1182 | error = gfs2_setattr_simple(ip, attr); | |
1183 | ||
a91ea69f | 1184 | out: |
b3b94faa | 1185 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1186 | if (!error) |
1187 | mark_inode_dirty(inode); | |
b3b94faa DT |
1188 | return error; |
1189 | } | |
1190 | ||
1191 | /** | |
1192 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1193 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1194 | * @dentry: The dentry to stat |
1195 | * @stat: The inode's stats | |
1196 | * | |
dcf3dd85 SW |
1197 | * This may be called from the VFS directly, or from within GFS2 with the |
1198 | * inode locked, so we look to see if the glock is already locked and only | |
1199 | * lock the glock if its not already been done. Note that its the NFS | |
1200 | * readdirplus operation which causes this to be called (from filldir) | |
1201 | * with the glock already held. | |
1202 | * | |
b3b94faa DT |
1203 | * Returns: errno |
1204 | */ | |
1205 | ||
1206 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1207 | struct kstat *stat) | |
1208 | { | |
1209 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1210 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1211 | struct gfs2_holder gh; |
1212 | int error; | |
dcf3dd85 | 1213 | int unlock = 0; |
b3b94faa | 1214 | |
7afd88d9 | 1215 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
dcf3dd85 SW |
1216 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1217 | if (error) | |
1218 | return error; | |
1219 | unlock = 1; | |
b3b94faa DT |
1220 | } |
1221 | ||
dcf3dd85 | 1222 | generic_fillattr(inode, stat); |
d7c103d0 | 1223 | if (unlock) |
dcf3dd85 SW |
1224 | gfs2_glock_dq_uninit(&gh); |
1225 | ||
1226 | return 0; | |
b3b94faa DT |
1227 | } |
1228 | ||
1229 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1230 | const void *data, size_t size, int flags) | |
1231 | { | |
feaa7bba | 1232 | struct inode *inode = dentry->d_inode; |
40b78a32 SW |
1233 | struct gfs2_inode *ip = GFS2_I(inode); |
1234 | struct gfs2_holder gh; | |
1235 | int ret; | |
b3b94faa | 1236 | |
40b78a32 SW |
1237 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1238 | ret = gfs2_glock_nq(&gh); | |
1239 | if (ret == 0) { | |
1240 | ret = generic_setxattr(dentry, name, data, size, flags); | |
1241 | gfs2_glock_dq(&gh); | |
1242 | } | |
1243 | gfs2_holder_uninit(&gh); | |
1244 | return ret; | |
b3b94faa DT |
1245 | } |
1246 | ||
1247 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1248 | void *data, size_t size) | |
1249 | { | |
40b78a32 SW |
1250 | struct inode *inode = dentry->d_inode; |
1251 | struct gfs2_inode *ip = GFS2_I(inode); | |
1252 | struct gfs2_holder gh; | |
1253 | int ret; | |
b3b94faa | 1254 | |
40b78a32 SW |
1255 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1256 | ret = gfs2_glock_nq(&gh); | |
1257 | if (ret == 0) { | |
1258 | ret = generic_getxattr(dentry, name, data, size); | |
1259 | gfs2_glock_dq(&gh); | |
1260 | } | |
1261 | gfs2_holder_uninit(&gh); | |
1262 | return ret; | |
b3b94faa DT |
1263 | } |
1264 | ||
1265 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1266 | { | |
40b78a32 SW |
1267 | struct inode *inode = dentry->d_inode; |
1268 | struct gfs2_inode *ip = GFS2_I(inode); | |
1269 | struct gfs2_holder gh; | |
1270 | int ret; | |
b3b94faa | 1271 | |
40b78a32 SW |
1272 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1273 | ret = gfs2_glock_nq(&gh); | |
1274 | if (ret == 0) { | |
1275 | ret = generic_removexattr(dentry, name); | |
1276 | gfs2_glock_dq(&gh); | |
1277 | } | |
1278 | gfs2_holder_uninit(&gh); | |
1279 | return ret; | |
b3b94faa DT |
1280 | } |
1281 | ||
3921120e BM |
1282 | static void empty_write_end(struct page *page, unsigned from, |
1283 | unsigned to) | |
1284 | { | |
1285 | struct gfs2_inode *ip = GFS2_I(page->mapping->host); | |
1286 | ||
1287 | page_zero_new_buffers(page, from, to); | |
1288 | flush_dcache_page(page); | |
1289 | mark_page_accessed(page); | |
1290 | ||
1291 | if (!gfs2_is_writeback(ip)) | |
1292 | gfs2_page_add_databufs(ip, page, from, to); | |
1293 | ||
1294 | block_commit_write(page, from, to); | |
1295 | } | |
1296 | ||
1297 | ||
1298 | static int write_empty_blocks(struct page *page, unsigned from, unsigned to) | |
1299 | { | |
1300 | unsigned start, end, next; | |
1301 | struct buffer_head *bh, *head; | |
1302 | int error; | |
1303 | ||
1304 | if (!page_has_buffers(page)) { | |
1305 | error = block_prepare_write(page, from, to, gfs2_block_map); | |
1306 | if (unlikely(error)) | |
1307 | return error; | |
1308 | ||
1309 | empty_write_end(page, from, to); | |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | bh = head = page_buffers(page); | |
1314 | next = end = 0; | |
1315 | while (next < from) { | |
1316 | next += bh->b_size; | |
1317 | bh = bh->b_this_page; | |
1318 | } | |
1319 | start = next; | |
1320 | do { | |
1321 | next += bh->b_size; | |
1322 | if (buffer_mapped(bh)) { | |
1323 | if (end) { | |
1324 | error = block_prepare_write(page, start, end, | |
1325 | gfs2_block_map); | |
1326 | if (unlikely(error)) | |
1327 | return error; | |
1328 | empty_write_end(page, start, end); | |
1329 | end = 0; | |
1330 | } | |
1331 | start = next; | |
1332 | } | |
1333 | else | |
1334 | end = next; | |
1335 | bh = bh->b_this_page; | |
1336 | } while (next < to); | |
1337 | ||
1338 | if (end) { | |
1339 | error = block_prepare_write(page, start, end, gfs2_block_map); | |
1340 | if (unlikely(error)) | |
1341 | return error; | |
1342 | empty_write_end(page, start, end); | |
1343 | } | |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len, | |
1349 | int mode) | |
1350 | { | |
1351 | struct gfs2_inode *ip = GFS2_I(inode); | |
1352 | struct buffer_head *dibh; | |
1353 | int error; | |
1354 | u64 start = offset >> PAGE_CACHE_SHIFT; | |
1355 | unsigned int start_offset = offset & ~PAGE_CACHE_MASK; | |
1356 | u64 end = (offset + len - 1) >> PAGE_CACHE_SHIFT; | |
1357 | pgoff_t curr; | |
1358 | struct page *page; | |
1359 | unsigned int end_offset = (offset + len) & ~PAGE_CACHE_MASK; | |
1360 | unsigned int from, to; | |
1361 | ||
1362 | if (!end_offset) | |
1363 | end_offset = PAGE_CACHE_SIZE; | |
1364 | ||
1365 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1366 | if (unlikely(error)) | |
1367 | goto out; | |
1368 | ||
1369 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
1370 | ||
1371 | if (gfs2_is_stuffed(ip)) { | |
1372 | error = gfs2_unstuff_dinode(ip, NULL); | |
1373 | if (unlikely(error)) | |
1374 | goto out; | |
1375 | } | |
1376 | ||
1377 | curr = start; | |
1378 | offset = start << PAGE_CACHE_SHIFT; | |
1379 | from = start_offset; | |
1380 | to = PAGE_CACHE_SIZE; | |
1381 | while (curr <= end) { | |
1382 | page = grab_cache_page_write_begin(inode->i_mapping, curr, | |
1383 | AOP_FLAG_NOFS); | |
1384 | if (unlikely(!page)) { | |
1385 | error = -ENOMEM; | |
1386 | goto out; | |
1387 | } | |
1388 | ||
1389 | if (curr == end) | |
1390 | to = end_offset; | |
1391 | error = write_empty_blocks(page, from, to); | |
1392 | if (!error && offset + to > inode->i_size && | |
1393 | !(mode & FALLOC_FL_KEEP_SIZE)) { | |
1394 | i_size_write(inode, offset + to); | |
1395 | } | |
1396 | unlock_page(page); | |
1397 | page_cache_release(page); | |
1398 | if (error) | |
1399 | goto out; | |
1400 | curr++; | |
1401 | offset += PAGE_CACHE_SIZE; | |
1402 | from = 0; | |
1403 | } | |
1404 | ||
1405 | gfs2_dinode_out(ip, dibh->b_data); | |
1406 | mark_inode_dirty(inode); | |
1407 | ||
1408 | brelse(dibh); | |
1409 | ||
1410 | out: | |
1411 | return error; | |
1412 | } | |
1413 | ||
1414 | static void calc_max_reserv(struct gfs2_inode *ip, loff_t max, loff_t *len, | |
1415 | unsigned int *data_blocks, unsigned int *ind_blocks) | |
1416 | { | |
1417 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
1418 | unsigned int max_blocks = ip->i_alloc->al_rgd->rd_free_clone; | |
1419 | unsigned int tmp, max_data = max_blocks - 3 * (sdp->sd_max_height - 1); | |
1420 | ||
1421 | for (tmp = max_data; tmp > sdp->sd_diptrs;) { | |
1422 | tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); | |
1423 | max_data -= tmp; | |
1424 | } | |
1425 | /* This calculation isn't the exact reverse of gfs2_write_calc_reserve, | |
fe08d5a8 | 1426 | so it might end up with fewer data blocks */ |
3921120e BM |
1427 | if (max_data <= *data_blocks) |
1428 | return; | |
1429 | *data_blocks = max_data; | |
1430 | *ind_blocks = max_blocks - max_data; | |
1431 | *len = ((loff_t)max_data - 3) << sdp->sd_sb.sb_bsize_shift; | |
1432 | if (*len > max) { | |
1433 | *len = max; | |
1434 | gfs2_write_calc_reserv(ip, max, data_blocks, ind_blocks); | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | static long gfs2_fallocate(struct inode *inode, int mode, loff_t offset, | |
1439 | loff_t len) | |
1440 | { | |
1441 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
1442 | struct gfs2_inode *ip = GFS2_I(inode); | |
1443 | unsigned int data_blocks = 0, ind_blocks = 0, rblocks; | |
1444 | loff_t bytes, max_bytes; | |
1445 | struct gfs2_alloc *al; | |
1446 | int error; | |
1447 | loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift; | |
1448 | next = (next + 1) << sdp->sd_sb.sb_bsize_shift; | |
1449 | ||
1450 | offset = (offset >> sdp->sd_sb.sb_bsize_shift) << | |
1451 | sdp->sd_sb.sb_bsize_shift; | |
1452 | ||
1453 | len = next - offset; | |
1454 | bytes = sdp->sd_max_rg_data * sdp->sd_sb.sb_bsize / 2; | |
1455 | if (!bytes) | |
1456 | bytes = UINT_MAX; | |
1457 | ||
1458 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh); | |
1459 | error = gfs2_glock_nq(&ip->i_gh); | |
1460 | if (unlikely(error)) | |
1461 | goto out_uninit; | |
1462 | ||
1463 | if (!gfs2_write_alloc_required(ip, offset, len)) | |
1464 | goto out_unlock; | |
1465 | ||
1466 | while (len > 0) { | |
1467 | if (len < bytes) | |
1468 | bytes = len; | |
1469 | al = gfs2_alloc_get(ip); | |
1470 | if (!al) { | |
1471 | error = -ENOMEM; | |
1472 | goto out_unlock; | |
1473 | } | |
1474 | ||
1475 | error = gfs2_quota_lock_check(ip); | |
1476 | if (error) | |
1477 | goto out_alloc_put; | |
1478 | ||
1479 | retry: | |
1480 | gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks); | |
1481 | ||
1482 | al->al_requested = data_blocks + ind_blocks; | |
1483 | error = gfs2_inplace_reserve(ip); | |
1484 | if (error) { | |
1485 | if (error == -ENOSPC && bytes > sdp->sd_sb.sb_bsize) { | |
1486 | bytes >>= 1; | |
1487 | goto retry; | |
1488 | } | |
1489 | goto out_qunlock; | |
1490 | } | |
1491 | max_bytes = bytes; | |
1492 | calc_max_reserv(ip, len, &max_bytes, &data_blocks, &ind_blocks); | |
1493 | al->al_requested = data_blocks + ind_blocks; | |
1494 | ||
1495 | rblocks = RES_DINODE + ind_blocks + RES_STATFS + RES_QUOTA + | |
1496 | RES_RG_HDR + ip->i_alloc->al_rgd->rd_length; | |
1497 | if (gfs2_is_jdata(ip)) | |
1498 | rblocks += data_blocks ? data_blocks : 1; | |
1499 | ||
1500 | error = gfs2_trans_begin(sdp, rblocks, | |
1501 | PAGE_CACHE_SIZE/sdp->sd_sb.sb_bsize); | |
1502 | if (error) | |
1503 | goto out_trans_fail; | |
1504 | ||
1505 | error = fallocate_chunk(inode, offset, max_bytes, mode); | |
1506 | gfs2_trans_end(sdp); | |
1507 | ||
1508 | if (error) | |
1509 | goto out_trans_fail; | |
1510 | ||
1511 | len -= max_bytes; | |
1512 | offset += max_bytes; | |
1513 | gfs2_inplace_release(ip); | |
1514 | gfs2_quota_unlock(ip); | |
1515 | gfs2_alloc_put(ip); | |
1516 | } | |
1517 | goto out_unlock; | |
1518 | ||
1519 | out_trans_fail: | |
1520 | gfs2_inplace_release(ip); | |
1521 | out_qunlock: | |
1522 | gfs2_quota_unlock(ip); | |
1523 | out_alloc_put: | |
1524 | gfs2_alloc_put(ip); | |
1525 | out_unlock: | |
1526 | gfs2_glock_dq(&ip->i_gh); | |
1527 | out_uninit: | |
1528 | gfs2_holder_uninit(&ip->i_gh); | |
1529 | return error; | |
1530 | } | |
1531 | ||
1532 | ||
e9079cce SW |
1533 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1534 | u64 start, u64 len) | |
1535 | { | |
1536 | struct gfs2_inode *ip = GFS2_I(inode); | |
1537 | struct gfs2_holder gh; | |
1538 | int ret; | |
1539 | ||
1540 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1541 | if (ret) | |
1542 | return ret; | |
1543 | ||
1544 | mutex_lock(&inode->i_mutex); | |
1545 | ||
1546 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
1547 | if (ret) | |
1548 | goto out; | |
1549 | ||
1550 | if (gfs2_is_stuffed(ip)) { | |
1551 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
1552 | u64 size = i_size_read(inode); | |
1553 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
1554 | FIEMAP_EXTENT_DATA_INLINE; | |
1555 | phys += sizeof(struct gfs2_dinode); | |
1556 | phys += start; | |
1557 | if (start + len > size) | |
1558 | len = size - start; | |
1559 | if (start < size) | |
1560 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
1561 | len, flags); | |
1562 | if (ret == 1) | |
1563 | ret = 0; | |
1564 | } else { | |
1565 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
1566 | gfs2_block_map); | |
1567 | } | |
1568 | ||
1569 | gfs2_glock_dq_uninit(&gh); | |
1570 | out: | |
1571 | mutex_unlock(&inode->i_mutex); | |
1572 | return ret; | |
1573 | } | |
1574 | ||
92e1d5be | 1575 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 1576 | .permission = gfs2_permission, |
b3b94faa DT |
1577 | .setattr = gfs2_setattr, |
1578 | .getattr = gfs2_getattr, | |
1579 | .setxattr = gfs2_setxattr, | |
1580 | .getxattr = gfs2_getxattr, | |
1581 | .listxattr = gfs2_listxattr, | |
1582 | .removexattr = gfs2_removexattr, | |
3921120e | 1583 | .fallocate = gfs2_fallocate, |
e9079cce | 1584 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1585 | }; |
1586 | ||
92e1d5be | 1587 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1588 | .create = gfs2_create, |
1589 | .lookup = gfs2_lookup, | |
1590 | .link = gfs2_link, | |
1591 | .unlink = gfs2_unlink, | |
1592 | .symlink = gfs2_symlink, | |
1593 | .mkdir = gfs2_mkdir, | |
1594 | .rmdir = gfs2_rmdir, | |
1595 | .mknod = gfs2_mknod, | |
1596 | .rename = gfs2_rename, | |
e6305c43 | 1597 | .permission = gfs2_permission, |
b3b94faa DT |
1598 | .setattr = gfs2_setattr, |
1599 | .getattr = gfs2_getattr, | |
1600 | .setxattr = gfs2_setxattr, | |
1601 | .getxattr = gfs2_getxattr, | |
1602 | .listxattr = gfs2_listxattr, | |
1603 | .removexattr = gfs2_removexattr, | |
e9079cce | 1604 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1605 | }; |
1606 | ||
92e1d5be | 1607 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 1608 | .readlink = generic_readlink, |
b3b94faa | 1609 | .follow_link = gfs2_follow_link, |
c177c2ac | 1610 | .put_link = gfs2_put_link, |
e6305c43 | 1611 | .permission = gfs2_permission, |
b3b94faa DT |
1612 | .setattr = gfs2_setattr, |
1613 | .getattr = gfs2_getattr, | |
1614 | .setxattr = gfs2_setxattr, | |
1615 | .getxattr = gfs2_getxattr, | |
1616 | .listxattr = gfs2_listxattr, | |
1617 | .removexattr = gfs2_removexattr, | |
e9079cce | 1618 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1619 | }; |
1620 |