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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 | |
fb045adb | 109 | d_set_d_op(dentry, &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 + |
bf97b673 | 222 | gfs2_rg_blocks(al) + |
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) { |
7de9c6ee | 258 | ihold(inode); |
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); |
b3b94faa | 474 | |
c752666c | 475 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
8d123585 | 476 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); |
b3b94faa | 477 | dent->de_inum = di->di_num; /* already GFS2 endian */ |
7ecdb70a | 478 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa DT |
479 | di->di_entries = cpu_to_be32(1); |
480 | ||
c752666c | 481 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); |
8d123585 | 482 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); |
b3b94faa | 483 | |
dbb7cae2 | 484 | gfs2_inum_out(dip, dent); |
7ecdb70a | 485 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa | 486 | |
539e5d6b | 487 | gfs2_dinode_out(ip, di); |
b3b94faa DT |
488 | |
489 | brelse(dibh); | |
490 | } | |
491 | ||
492 | error = gfs2_change_nlink(dip, +1); | |
493 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ | |
494 | ||
495 | gfs2_trans_end(sdp); | |
6dbd8224 | 496 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
497 | gfs2_inplace_release(dip); |
498 | gfs2_quota_unlock(dip); | |
499 | gfs2_alloc_put(dip); | |
500 | ||
501 | gfs2_glock_dq_uninit_m(2, ghs); | |
502 | ||
b3b94faa DT |
503 | d_instantiate(dentry, inode); |
504 | mark_inode_dirty(inode); | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
2286dbfa SW |
509 | /** |
510 | * gfs2_rmdiri - Remove a directory | |
511 | * @dip: The parent directory of the directory to be removed | |
512 | * @name: The name of the directory to be removed | |
513 | * @ip: The GFS2 inode of the directory to be removed | |
514 | * | |
515 | * Assumes Glocks on dip and ip are held | |
516 | * | |
517 | * Returns: errno | |
518 | */ | |
519 | ||
520 | static int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, | |
521 | struct gfs2_inode *ip) | |
522 | { | |
2286dbfa SW |
523 | int error; |
524 | ||
525 | if (ip->i_entries != 2) { | |
526 | if (gfs2_consist_inode(ip)) | |
527 | gfs2_dinode_print(ip); | |
528 | return -EIO; | |
529 | } | |
530 | ||
531 | error = gfs2_dir_del(dip, name); | |
532 | if (error) | |
533 | return error; | |
534 | ||
535 | error = gfs2_change_nlink(dip, -1); | |
536 | if (error) | |
537 | return error; | |
538 | ||
8d123585 | 539 | error = gfs2_dir_del(ip, &gfs2_qdot); |
2286dbfa SW |
540 | if (error) |
541 | return error; | |
542 | ||
8d123585 | 543 | error = gfs2_dir_del(ip, &gfs2_qdotdot); |
2286dbfa SW |
544 | if (error) |
545 | return error; | |
546 | ||
547 | /* It looks odd, but it really should be done twice */ | |
548 | error = gfs2_change_nlink(ip, -1); | |
549 | if (error) | |
550 | return error; | |
551 | ||
552 | error = gfs2_change_nlink(ip, -1); | |
553 | if (error) | |
554 | return error; | |
555 | ||
556 | return error; | |
557 | } | |
558 | ||
b3b94faa DT |
559 | /** |
560 | * gfs2_rmdir - Remove a directory | |
561 | * @dir: The parent directory of the directory to be removed | |
562 | * @dentry: The dentry of the directory to remove | |
563 | * | |
564 | * Remove a directory. Call gfs2_rmdiri() | |
565 | * | |
566 | * Returns: errno | |
567 | */ | |
568 | ||
569 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) | |
570 | { | |
feaa7bba SW |
571 | struct gfs2_inode *dip = GFS2_I(dir); |
572 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
573 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
574 | struct gfs2_holder ghs[3]; |
575 | struct gfs2_rgrpd *rgd; | |
576 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
577 | int error; |
578 | ||
ddee7608 RC |
579 | error = gfs2_rindex_hold(sdp, &ri_gh); |
580 | if (error) | |
581 | return error; | |
b3b94faa DT |
582 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
583 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
584 | ||
dbb7cae2 | 585 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
586 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
587 | ||
72dbf479 BP |
588 | error = gfs2_glock_nq(ghs); /* parent */ |
589 | if (error) | |
590 | goto out_parent; | |
591 | ||
592 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 593 | if (error) |
72dbf479 BP |
594 | goto out_child; |
595 | ||
596 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ | |
597 | if (error) | |
598 | goto out_rgrp; | |
b3b94faa DT |
599 | |
600 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
601 | if (error) | |
602 | goto out_gunlock; | |
603 | ||
ad6203f2 | 604 | if (ip->i_entries < 2) { |
b3b94faa | 605 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 606 | gfs2_dinode_print(ip); |
b3b94faa DT |
607 | error = -EIO; |
608 | goto out_gunlock; | |
609 | } | |
ad6203f2 | 610 | if (ip->i_entries > 2) { |
b3b94faa DT |
611 | error = -ENOTEMPTY; |
612 | goto out_gunlock; | |
613 | } | |
614 | ||
feaa7bba | 615 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
616 | if (error) |
617 | goto out_gunlock; | |
618 | ||
feaa7bba | 619 | error = gfs2_rmdiri(dip, &dentry->d_name, ip); |
b3b94faa DT |
620 | |
621 | gfs2_trans_end(sdp); | |
622 | ||
a91ea69f | 623 | out_gunlock: |
72dbf479 BP |
624 | gfs2_glock_dq(ghs + 2); |
625 | out_rgrp: | |
ddee7608 | 626 | gfs2_holder_uninit(ghs + 2); |
72dbf479 BP |
627 | gfs2_glock_dq(ghs + 1); |
628 | out_child: | |
629 | gfs2_holder_uninit(ghs + 1); | |
630 | gfs2_glock_dq(ghs); | |
631 | out_parent: | |
632 | gfs2_holder_uninit(ghs); | |
ddee7608 | 633 | gfs2_glock_dq_uninit(&ri_gh); |
b3b94faa DT |
634 | return error; |
635 | } | |
636 | ||
637 | /** | |
638 | * gfs2_mknod - Make a special file | |
639 | * @dir: The directory in which the special file will reside | |
640 | * @dentry: The dentry of the special file | |
641 | * @mode: The mode of the special file | |
642 | * @rdev: The device specification of the special file | |
643 | * | |
644 | */ | |
645 | ||
646 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
647 | dev_t dev) | |
648 | { | |
e7f14f4d | 649 | struct gfs2_inode *dip = GFS2_I(dir); |
feaa7bba | 650 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
b3b94faa DT |
651 | struct gfs2_holder ghs[2]; |
652 | struct inode *inode; | |
b3b94faa DT |
653 | |
654 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
655 | ||
e7f14f4d | 656 | inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); |
7359a19c | 657 | if (IS_ERR(inode)) { |
b3b94faa | 658 | gfs2_holder_uninit(ghs); |
7359a19c | 659 | return PTR_ERR(inode); |
b3b94faa DT |
660 | } |
661 | ||
b3b94faa | 662 | gfs2_trans_end(sdp); |
6dbd8224 | 663 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
664 | gfs2_inplace_release(dip); |
665 | gfs2_quota_unlock(dip); | |
666 | gfs2_alloc_put(dip); | |
667 | ||
668 | gfs2_glock_dq_uninit_m(2, ghs); | |
669 | ||
b3b94faa DT |
670 | d_instantiate(dentry, inode); |
671 | mark_inode_dirty(inode); | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
0188d6c5 SW |
676 | /* |
677 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
678 | * @this: move this | |
679 | * @to: to here | |
680 | * | |
681 | * Follow @to back to the root and make sure we don't encounter @this | |
682 | * Assumes we already hold the rename lock. | |
683 | * | |
684 | * Returns: errno | |
685 | */ | |
686 | ||
687 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
688 | { | |
689 | struct inode *dir = &to->i_inode; | |
690 | struct super_block *sb = dir->i_sb; | |
691 | struct inode *tmp; | |
0188d6c5 SW |
692 | int error = 0; |
693 | ||
0188d6c5 SW |
694 | igrab(dir); |
695 | ||
696 | for (;;) { | |
697 | if (dir == &this->i_inode) { | |
698 | error = -EINVAL; | |
699 | break; | |
700 | } | |
701 | if (dir == sb->s_root->d_inode) { | |
702 | error = 0; | |
703 | break; | |
704 | } | |
705 | ||
8d123585 | 706 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
0188d6c5 SW |
707 | if (IS_ERR(tmp)) { |
708 | error = PTR_ERR(tmp); | |
709 | break; | |
710 | } | |
711 | ||
712 | iput(dir); | |
713 | dir = tmp; | |
714 | } | |
715 | ||
716 | iput(dir); | |
717 | ||
718 | return error; | |
719 | } | |
720 | ||
b3b94faa DT |
721 | /** |
722 | * gfs2_rename - Rename a file | |
723 | * @odir: Parent directory of old file name | |
724 | * @odentry: The old dentry of the file | |
725 | * @ndir: Parent directory of new file name | |
726 | * @ndentry: The new dentry of the file | |
727 | * | |
728 | * Returns: errno | |
729 | */ | |
730 | ||
731 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
732 | struct inode *ndir, struct dentry *ndentry) | |
733 | { | |
feaa7bba SW |
734 | struct gfs2_inode *odip = GFS2_I(odir); |
735 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
736 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 737 | struct gfs2_inode *nip = NULL; |
feaa7bba | 738 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
46290341 | 739 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }, ri_gh; |
ddee7608 | 740 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
741 | unsigned int num_gh; |
742 | int dir_rename = 0; | |
24b977b5 | 743 | int alloc_required = 0; |
b3b94faa DT |
744 | unsigned int x; |
745 | int error; | |
746 | ||
b3b94faa | 747 | if (ndentry->d_inode) { |
feaa7bba | 748 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
749 | if (ip == nip) |
750 | return 0; | |
751 | } | |
752 | ||
46290341 BP |
753 | error = gfs2_rindex_hold(sdp, &ri_gh); |
754 | if (error) | |
755 | return error; | |
b3b94faa | 756 | |
0188d6c5 SW |
757 | if (odip != ndip) { |
758 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
759 | 0, &r_gh); | |
b3b94faa DT |
760 | if (error) |
761 | goto out; | |
762 | ||
0188d6c5 SW |
763 | if (S_ISDIR(ip->i_inode.i_mode)) { |
764 | dir_rename = 1; | |
765 | /* don't move a dirctory into it's subdir */ | |
766 | error = gfs2_ok_to_move(ip, ndip); | |
767 | if (error) | |
768 | goto out_gunlock_r; | |
769 | } | |
b3b94faa DT |
770 | } |
771 | ||
d9d1ca30 | 772 | num_gh = 1; |
b3b94faa | 773 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
774 | if (odip != ndip) { |
775 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
776 | num_gh++; | |
777 | } | |
778 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
779 | num_gh++; | |
b3b94faa | 780 | |
d9d1ca30 SW |
781 | if (nip) { |
782 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
783 | num_gh++; | |
ddee7608 RC |
784 | /* grab the resource lock for unlink flag twiddling |
785 | * this is the case of the target file already existing | |
786 | * so we unlink before doing the rename | |
787 | */ | |
dbb7cae2 | 788 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); |
ddee7608 RC |
789 | if (nrgd) |
790 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 791 | } |
b3b94faa | 792 | |
72dbf479 BP |
793 | for (x = 0; x < num_gh; x++) { |
794 | error = gfs2_glock_nq(ghs + x); | |
795 | if (error) | |
796 | goto out_gunlock; | |
797 | } | |
b3b94faa DT |
798 | |
799 | /* Check out the old directory */ | |
800 | ||
801 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
802 | if (error) | |
803 | goto out_gunlock; | |
804 | ||
805 | /* Check out the new directory */ | |
806 | ||
807 | if (nip) { | |
808 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
809 | if (error) | |
810 | goto out_gunlock; | |
811 | ||
b60623c2 | 812 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 813 | if (nip->i_entries < 2) { |
b3b94faa | 814 | if (gfs2_consist_inode(nip)) |
4cc14f0b | 815 | gfs2_dinode_print(nip); |
b3b94faa DT |
816 | error = -EIO; |
817 | goto out_gunlock; | |
818 | } | |
ad6203f2 | 819 | if (nip->i_entries > 2) { |
b3b94faa DT |
820 | error = -ENOTEMPTY; |
821 | goto out_gunlock; | |
822 | } | |
823 | } | |
824 | } else { | |
f58ba889 | 825 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
826 | if (error) |
827 | goto out_gunlock; | |
828 | ||
dbb7cae2 | 829 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
830 | switch (error) { |
831 | case -ENOENT: | |
832 | error = 0; | |
833 | break; | |
834 | case 0: | |
835 | error = -EEXIST; | |
836 | default: | |
837 | goto out_gunlock; | |
838 | }; | |
839 | ||
840 | if (odip != ndip) { | |
4f56110a | 841 | if (!ndip->i_inode.i_nlink) { |
b3b94faa DT |
842 | error = -EINVAL; |
843 | goto out_gunlock; | |
844 | } | |
ad6203f2 | 845 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
846 | error = -EFBIG; |
847 | goto out_gunlock; | |
848 | } | |
b60623c2 | 849 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 850 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
851 | error = -EMLINK; |
852 | goto out_gunlock; | |
853 | } | |
854 | } | |
855 | } | |
856 | ||
857 | /* Check out the dir to be renamed */ | |
858 | ||
859 | if (dir_rename) { | |
f58ba889 | 860 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); |
b3b94faa DT |
861 | if (error) |
862 | goto out_gunlock; | |
863 | } | |
864 | ||
24b977b5 SW |
865 | if (nip == NULL) |
866 | alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); | |
867 | error = alloc_required; | |
c752666c | 868 | if (error < 0) |
b3b94faa | 869 | goto out_gunlock; |
c752666c | 870 | error = 0; |
b3b94faa DT |
871 | |
872 | if (alloc_required) { | |
873 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
182fe5ab CG |
874 | if (!al) { |
875 | error = -ENOMEM; | |
876 | goto out_gunlock; | |
877 | } | |
b3b94faa | 878 | |
d82661d9 | 879 | error = gfs2_quota_lock_check(ndip); |
b3b94faa DT |
880 | if (error) |
881 | goto out_alloc; | |
882 | ||
b3b94faa DT |
883 | al->al_requested = sdp->sd_max_dirres; |
884 | ||
46290341 | 885 | error = gfs2_inplace_reserve_ri(ndip); |
b3b94faa DT |
886 | if (error) |
887 | goto out_gunlock_q; | |
888 | ||
fe1bdedc | 889 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bf97b673 | 890 | gfs2_rg_blocks(al) + |
b3b94faa | 891 | 4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07 | 892 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
893 | if (error) |
894 | goto out_ipreserv; | |
895 | } else { | |
896 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 897 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
898 | if (error) |
899 | goto out_gunlock; | |
900 | } | |
901 | ||
902 | /* Remove the target file, if it exists */ | |
903 | ||
904 | if (nip) { | |
b60623c2 | 905 | if (S_ISDIR(nip->i_inode.i_mode)) |
feaa7bba SW |
906 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); |
907 | else { | |
908 | error = gfs2_dir_del(ndip, &ndentry->d_name); | |
909 | if (error) | |
910 | goto out_end_trans; | |
87d21e07 | 911 | error = gfs2_change_nlink(nip, -1); |
feaa7bba | 912 | } |
b3b94faa DT |
913 | if (error) |
914 | goto out_end_trans; | |
915 | } | |
916 | ||
917 | if (dir_rename) { | |
b3b94faa DT |
918 | error = gfs2_change_nlink(ndip, +1); |
919 | if (error) | |
920 | goto out_end_trans; | |
921 | error = gfs2_change_nlink(odip, -1); | |
922 | if (error) | |
923 | goto out_end_trans; | |
924 | ||
8d123585 | 925 | error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); |
b3b94faa DT |
926 | if (error) |
927 | goto out_end_trans; | |
928 | } else { | |
929 | struct buffer_head *dibh; | |
930 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
931 | if (error) | |
932 | goto out_end_trans; | |
4bd91ba1 | 933 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 934 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 935 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
936 | brelse(dibh); |
937 | } | |
938 | ||
939 | error = gfs2_dir_del(odip, &odentry->d_name); | |
940 | if (error) | |
941 | goto out_end_trans; | |
942 | ||
dbb7cae2 | 943 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
944 | if (error) |
945 | goto out_end_trans; | |
946 | ||
feaa7bba | 947 | out_end_trans: |
b3b94faa | 948 | gfs2_trans_end(sdp); |
feaa7bba | 949 | out_ipreserv: |
b3b94faa DT |
950 | if (alloc_required) |
951 | gfs2_inplace_release(ndip); | |
feaa7bba | 952 | out_gunlock_q: |
b3b94faa DT |
953 | if (alloc_required) |
954 | gfs2_quota_unlock(ndip); | |
feaa7bba | 955 | out_alloc: |
b3b94faa DT |
956 | if (alloc_required) |
957 | gfs2_alloc_put(ndip); | |
feaa7bba | 958 | out_gunlock: |
72dbf479 BP |
959 | while (x--) { |
960 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 961 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 962 | } |
feaa7bba | 963 | out_gunlock_r: |
0188d6c5 | 964 | if (r_gh.gh_gl) |
b3b94faa | 965 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 966 | out: |
46290341 | 967 | gfs2_glock_dq_uninit(&ri_gh); |
b3b94faa DT |
968 | return error; |
969 | } | |
970 | ||
536baf02 | 971 | /** |
c177c2ac AV |
972 | * gfs2_follow_link - Follow a symbolic link |
973 | * @dentry: The dentry of the link | |
974 | * @nd: Data that we pass to vfs_follow_link() | |
536baf02 | 975 | * |
c177c2ac | 976 | * This can handle symlinks of any size. |
536baf02 | 977 | * |
c177c2ac | 978 | * Returns: 0 on success or error code |
536baf02 SW |
979 | */ |
980 | ||
c177c2ac | 981 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) |
536baf02 | 982 | { |
c177c2ac | 983 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
536baf02 SW |
984 | struct gfs2_holder i_gh; |
985 | struct buffer_head *dibh; | |
a2e0f799 | 986 | unsigned int x, size; |
c177c2ac | 987 | char *buf; |
536baf02 SW |
988 | int error; |
989 | ||
990 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); | |
991 | error = gfs2_glock_nq(&i_gh); | |
992 | if (error) { | |
993 | gfs2_holder_uninit(&i_gh); | |
c177c2ac AV |
994 | nd_set_link(nd, ERR_PTR(error)); |
995 | return NULL; | |
536baf02 SW |
996 | } |
997 | ||
a2e0f799 SW |
998 | size = (unsigned int)i_size_read(&ip->i_inode); |
999 | if (size == 0) { | |
536baf02 | 1000 | gfs2_consist_inode(ip); |
c177c2ac | 1001 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1002 | goto out; |
1003 | } | |
1004 | ||
1005 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1006 | if (error) { |
1007 | buf = ERR_PTR(error); | |
536baf02 | 1008 | goto out; |
536baf02 SW |
1009 | } |
1010 | ||
a2e0f799 | 1011 | x = size + 1; |
c177c2ac AV |
1012 | buf = kmalloc(x, GFP_NOFS); |
1013 | if (!buf) | |
1014 | buf = ERR_PTR(-ENOMEM); | |
1015 | else | |
1016 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
536baf02 SW |
1017 | brelse(dibh); |
1018 | out: | |
1019 | gfs2_glock_dq_uninit(&i_gh); | |
c177c2ac AV |
1020 | nd_set_link(nd, buf); |
1021 | return NULL; | |
b3b94faa DT |
1022 | } |
1023 | ||
c177c2ac | 1024 | static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
b3b94faa | 1025 | { |
c177c2ac AV |
1026 | char *s = nd_get_link(nd); |
1027 | if (!IS_ERR(s)) | |
1028 | kfree(s); | |
b3b94faa DT |
1029 | } |
1030 | ||
1031 | /** | |
1032 | * gfs2_permission - | |
1033 | * @inode: | |
1034 | * @mask: | |
1035 | * @nd: passed from Linux VFS, ignored by us | |
1036 | * | |
300c7d75 SW |
1037 | * This may be called from the VFS directly, or from within GFS2 with the |
1038 | * inode locked, so we look to see if the glock is already locked and only | |
1039 | * lock the glock if its not already been done. | |
1040 | * | |
b3b94faa DT |
1041 | * Returns: errno |
1042 | */ | |
1043 | ||
f58ba889 | 1044 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1045 | { |
feaa7bba | 1046 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1047 | struct gfs2_holder i_gh; |
1048 | int error; | |
300c7d75 | 1049 | int unlock = 0; |
b3b94faa | 1050 | |
7afd88d9 | 1051 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
300c7d75 SW |
1052 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
1053 | if (error) | |
1054 | return error; | |
1055 | unlock = 1; | |
1056 | } | |
b3b94faa | 1057 | |
f58ba889 MS |
1058 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
1059 | error = -EACCES; | |
1060 | else | |
1061 | error = generic_permission(inode, mask, gfs2_check_acl); | |
300c7d75 | 1062 | if (unlock) |
b3b94faa | 1063 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1064 | |
1065 | return error; | |
1066 | } | |
1067 | ||
b3b94faa DT |
1068 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1069 | { | |
feaa7bba SW |
1070 | struct gfs2_inode *ip = GFS2_I(inode); |
1071 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
b3b94faa | 1072 | struct buffer_head *dibh; |
cd915493 | 1073 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
1074 | int error; |
1075 | ||
2933f925 SW |
1076 | ouid = inode->i_uid; |
1077 | ogid = inode->i_gid; | |
b3b94faa DT |
1078 | nuid = attr->ia_uid; |
1079 | ngid = attr->ia_gid; | |
1080 | ||
1081 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
1082 | ouid = nuid = NO_QUOTA_CHANGE; | |
1083 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
1084 | ogid = ngid = NO_QUOTA_CHANGE; | |
1085 | ||
182fe5ab CG |
1086 | if (!gfs2_alloc_get(ip)) |
1087 | return -ENOMEM; | |
b3b94faa DT |
1088 | |
1089 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1090 | if (error) | |
1091 | goto out_alloc; | |
1092 | ||
1093 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
1094 | error = gfs2_quota_check(ip, nuid, ngid); | |
1095 | if (error) | |
1096 | goto out_gunlock_q; | |
1097 | } | |
1098 | ||
1099 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1100 | if (error) | |
1101 | goto out_gunlock_q; | |
1102 | ||
1103 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1104 | if (error) | |
1105 | goto out_end_trans; | |
1106 | ||
1025774c CH |
1107 | if ((attr->ia_valid & ATTR_SIZE) && |
1108 | attr->ia_size != i_size_read(inode)) { | |
1109 | int error; | |
1110 | ||
1111 | error = vmtruncate(inode, attr->ia_size); | |
1112 | gfs2_assert_warn(sdp, !error); | |
1113 | } | |
1114 | ||
1115 | setattr_copy(inode, attr); | |
1116 | mark_inode_dirty(inode); | |
b3b94faa | 1117 | |
d4e9c4c3 | 1118 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1119 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1120 | brelse(dibh); |
1121 | ||
1122 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
77658aad SW |
1123 | u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); |
1124 | gfs2_quota_change(ip, -blocks, ouid, ogid); | |
1125 | gfs2_quota_change(ip, blocks, nuid, ngid); | |
b3b94faa DT |
1126 | } |
1127 | ||
a91ea69f | 1128 | out_end_trans: |
b3b94faa | 1129 | gfs2_trans_end(sdp); |
a91ea69f | 1130 | out_gunlock_q: |
b3b94faa | 1131 | gfs2_quota_unlock(ip); |
a91ea69f | 1132 | out_alloc: |
b3b94faa | 1133 | gfs2_alloc_put(ip); |
b3b94faa DT |
1134 | return error; |
1135 | } | |
1136 | ||
1137 | /** | |
1138 | * gfs2_setattr - Change attributes on an inode | |
1139 | * @dentry: The dentry which is changing | |
1140 | * @attr: The structure describing the change | |
1141 | * | |
1142 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1143 | * that change out to disk. | |
1144 | * | |
1145 | * Returns: errno | |
1146 | */ | |
1147 | ||
1148 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1149 | { | |
1150 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1151 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1152 | struct gfs2_holder i_gh; |
1153 | int error; | |
1154 | ||
b3b94faa DT |
1155 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1156 | if (error) | |
1157 | return error; | |
1158 | ||
1159 | error = -EPERM; | |
1160 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1161 | goto out; | |
1162 | ||
1163 | error = inode_change_ok(inode, attr); | |
1164 | if (error) | |
1165 | goto out; | |
1166 | ||
1167 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1168 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1169 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1170 | error = setattr_chown(inode, attr); | |
1171 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1172 | error = gfs2_acl_chmod(ip, attr); | |
1173 | else | |
1174 | error = gfs2_setattr_simple(ip, attr); | |
1175 | ||
a91ea69f | 1176 | out: |
b3b94faa | 1177 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1178 | if (!error) |
1179 | mark_inode_dirty(inode); | |
b3b94faa DT |
1180 | return error; |
1181 | } | |
1182 | ||
1183 | /** | |
1184 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1185 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1186 | * @dentry: The dentry to stat |
1187 | * @stat: The inode's stats | |
1188 | * | |
dcf3dd85 SW |
1189 | * This may be called from the VFS directly, or from within GFS2 with the |
1190 | * inode locked, so we look to see if the glock is already locked and only | |
1191 | * lock the glock if its not already been done. Note that its the NFS | |
1192 | * readdirplus operation which causes this to be called (from filldir) | |
1193 | * with the glock already held. | |
1194 | * | |
b3b94faa DT |
1195 | * Returns: errno |
1196 | */ | |
1197 | ||
1198 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1199 | struct kstat *stat) | |
1200 | { | |
1201 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1202 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1203 | struct gfs2_holder gh; |
1204 | int error; | |
dcf3dd85 | 1205 | int unlock = 0; |
b3b94faa | 1206 | |
7afd88d9 | 1207 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
dcf3dd85 SW |
1208 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1209 | if (error) | |
1210 | return error; | |
1211 | unlock = 1; | |
b3b94faa DT |
1212 | } |
1213 | ||
dcf3dd85 | 1214 | generic_fillattr(inode, stat); |
d7c103d0 | 1215 | if (unlock) |
dcf3dd85 SW |
1216 | gfs2_glock_dq_uninit(&gh); |
1217 | ||
1218 | return 0; | |
b3b94faa DT |
1219 | } |
1220 | ||
1221 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1222 | const void *data, size_t size, int flags) | |
1223 | { | |
feaa7bba | 1224 | struct inode *inode = dentry->d_inode; |
40b78a32 SW |
1225 | struct gfs2_inode *ip = GFS2_I(inode); |
1226 | struct gfs2_holder gh; | |
1227 | int ret; | |
b3b94faa | 1228 | |
40b78a32 SW |
1229 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1230 | ret = gfs2_glock_nq(&gh); | |
1231 | if (ret == 0) { | |
1232 | ret = generic_setxattr(dentry, name, data, size, flags); | |
1233 | gfs2_glock_dq(&gh); | |
1234 | } | |
1235 | gfs2_holder_uninit(&gh); | |
1236 | return ret; | |
b3b94faa DT |
1237 | } |
1238 | ||
1239 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1240 | void *data, size_t size) | |
1241 | { | |
40b78a32 SW |
1242 | struct inode *inode = dentry->d_inode; |
1243 | struct gfs2_inode *ip = GFS2_I(inode); | |
1244 | struct gfs2_holder gh; | |
1245 | int ret; | |
b3b94faa | 1246 | |
40b78a32 SW |
1247 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1248 | ret = gfs2_glock_nq(&gh); | |
1249 | if (ret == 0) { | |
1250 | ret = generic_getxattr(dentry, name, data, size); | |
1251 | gfs2_glock_dq(&gh); | |
1252 | } | |
1253 | gfs2_holder_uninit(&gh); | |
1254 | return ret; | |
b3b94faa DT |
1255 | } |
1256 | ||
1257 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1258 | { | |
40b78a32 SW |
1259 | struct inode *inode = dentry->d_inode; |
1260 | struct gfs2_inode *ip = GFS2_I(inode); | |
1261 | struct gfs2_holder gh; | |
1262 | int ret; | |
b3b94faa | 1263 | |
40b78a32 SW |
1264 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1265 | ret = gfs2_glock_nq(&gh); | |
1266 | if (ret == 0) { | |
1267 | ret = generic_removexattr(dentry, name); | |
1268 | gfs2_glock_dq(&gh); | |
1269 | } | |
1270 | gfs2_holder_uninit(&gh); | |
1271 | return ret; | |
b3b94faa DT |
1272 | } |
1273 | ||
3921120e BM |
1274 | static void empty_write_end(struct page *page, unsigned from, |
1275 | unsigned to) | |
1276 | { | |
1277 | struct gfs2_inode *ip = GFS2_I(page->mapping->host); | |
1278 | ||
1279 | page_zero_new_buffers(page, from, to); | |
1280 | flush_dcache_page(page); | |
1281 | mark_page_accessed(page); | |
1282 | ||
1283 | if (!gfs2_is_writeback(ip)) | |
1284 | gfs2_page_add_databufs(ip, page, from, to); | |
1285 | ||
1286 | block_commit_write(page, from, to); | |
1287 | } | |
1288 | ||
1289 | ||
1290 | static int write_empty_blocks(struct page *page, unsigned from, unsigned to) | |
1291 | { | |
1292 | unsigned start, end, next; | |
1293 | struct buffer_head *bh, *head; | |
1294 | int error; | |
1295 | ||
1296 | if (!page_has_buffers(page)) { | |
ebdec241 | 1297 | error = __block_write_begin(page, from, to - from, gfs2_block_map); |
3921120e BM |
1298 | if (unlikely(error)) |
1299 | return error; | |
1300 | ||
1301 | empty_write_end(page, from, to); | |
1302 | return 0; | |
1303 | } | |
1304 | ||
1305 | bh = head = page_buffers(page); | |
1306 | next = end = 0; | |
1307 | while (next < from) { | |
1308 | next += bh->b_size; | |
1309 | bh = bh->b_this_page; | |
1310 | } | |
1311 | start = next; | |
1312 | do { | |
1313 | next += bh->b_size; | |
1314 | if (buffer_mapped(bh)) { | |
1315 | if (end) { | |
ebdec241 | 1316 | error = __block_write_begin(page, start, end - start, |
3921120e BM |
1317 | gfs2_block_map); |
1318 | if (unlikely(error)) | |
1319 | return error; | |
1320 | empty_write_end(page, start, end); | |
1321 | end = 0; | |
1322 | } | |
1323 | start = next; | |
1324 | } | |
1325 | else | |
1326 | end = next; | |
1327 | bh = bh->b_this_page; | |
1328 | } while (next < to); | |
1329 | ||
1330 | if (end) { | |
ebdec241 | 1331 | error = __block_write_begin(page, start, end - start, gfs2_block_map); |
3921120e BM |
1332 | if (unlikely(error)) |
1333 | return error; | |
1334 | empty_write_end(page, start, end); | |
1335 | } | |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len, | |
1341 | int mode) | |
1342 | { | |
1343 | struct gfs2_inode *ip = GFS2_I(inode); | |
1344 | struct buffer_head *dibh; | |
1345 | int error; | |
1346 | u64 start = offset >> PAGE_CACHE_SHIFT; | |
1347 | unsigned int start_offset = offset & ~PAGE_CACHE_MASK; | |
1348 | u64 end = (offset + len - 1) >> PAGE_CACHE_SHIFT; | |
1349 | pgoff_t curr; | |
1350 | struct page *page; | |
1351 | unsigned int end_offset = (offset + len) & ~PAGE_CACHE_MASK; | |
1352 | unsigned int from, to; | |
1353 | ||
1354 | if (!end_offset) | |
1355 | end_offset = PAGE_CACHE_SIZE; | |
1356 | ||
1357 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1358 | if (unlikely(error)) | |
1359 | goto out; | |
1360 | ||
1361 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
1362 | ||
1363 | if (gfs2_is_stuffed(ip)) { | |
1364 | error = gfs2_unstuff_dinode(ip, NULL); | |
1365 | if (unlikely(error)) | |
1366 | goto out; | |
1367 | } | |
1368 | ||
1369 | curr = start; | |
1370 | offset = start << PAGE_CACHE_SHIFT; | |
1371 | from = start_offset; | |
1372 | to = PAGE_CACHE_SIZE; | |
1373 | while (curr <= end) { | |
1374 | page = grab_cache_page_write_begin(inode->i_mapping, curr, | |
1375 | AOP_FLAG_NOFS); | |
1376 | if (unlikely(!page)) { | |
1377 | error = -ENOMEM; | |
1378 | goto out; | |
1379 | } | |
1380 | ||
1381 | if (curr == end) | |
1382 | to = end_offset; | |
1383 | error = write_empty_blocks(page, from, to); | |
1384 | if (!error && offset + to > inode->i_size && | |
1385 | !(mode & FALLOC_FL_KEEP_SIZE)) { | |
1386 | i_size_write(inode, offset + to); | |
1387 | } | |
1388 | unlock_page(page); | |
1389 | page_cache_release(page); | |
1390 | if (error) | |
1391 | goto out; | |
1392 | curr++; | |
1393 | offset += PAGE_CACHE_SIZE; | |
1394 | from = 0; | |
1395 | } | |
1396 | ||
1397 | gfs2_dinode_out(ip, dibh->b_data); | |
1398 | mark_inode_dirty(inode); | |
1399 | ||
1400 | brelse(dibh); | |
1401 | ||
1402 | out: | |
1403 | return error; | |
1404 | } | |
1405 | ||
1406 | static void calc_max_reserv(struct gfs2_inode *ip, loff_t max, loff_t *len, | |
1407 | unsigned int *data_blocks, unsigned int *ind_blocks) | |
1408 | { | |
1409 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
1410 | unsigned int max_blocks = ip->i_alloc->al_rgd->rd_free_clone; | |
1411 | unsigned int tmp, max_data = max_blocks - 3 * (sdp->sd_max_height - 1); | |
1412 | ||
1413 | for (tmp = max_data; tmp > sdp->sd_diptrs;) { | |
1414 | tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); | |
1415 | max_data -= tmp; | |
1416 | } | |
1417 | /* This calculation isn't the exact reverse of gfs2_write_calc_reserve, | |
fe08d5a8 | 1418 | so it might end up with fewer data blocks */ |
3921120e BM |
1419 | if (max_data <= *data_blocks) |
1420 | return; | |
1421 | *data_blocks = max_data; | |
1422 | *ind_blocks = max_blocks - max_data; | |
1423 | *len = ((loff_t)max_data - 3) << sdp->sd_sb.sb_bsize_shift; | |
1424 | if (*len > max) { | |
1425 | *len = max; | |
1426 | gfs2_write_calc_reserv(ip, max, data_blocks, ind_blocks); | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | static long gfs2_fallocate(struct inode *inode, int mode, loff_t offset, | |
1431 | loff_t len) | |
1432 | { | |
1433 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
1434 | struct gfs2_inode *ip = GFS2_I(inode); | |
1435 | unsigned int data_blocks = 0, ind_blocks = 0, rblocks; | |
1436 | loff_t bytes, max_bytes; | |
1437 | struct gfs2_alloc *al; | |
1438 | int error; | |
1439 | loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift; | |
1440 | next = (next + 1) << sdp->sd_sb.sb_bsize_shift; | |
1441 | ||
1442 | offset = (offset >> sdp->sd_sb.sb_bsize_shift) << | |
1443 | sdp->sd_sb.sb_bsize_shift; | |
1444 | ||
1445 | len = next - offset; | |
1446 | bytes = sdp->sd_max_rg_data * sdp->sd_sb.sb_bsize / 2; | |
1447 | if (!bytes) | |
1448 | bytes = UINT_MAX; | |
1449 | ||
1450 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh); | |
1451 | error = gfs2_glock_nq(&ip->i_gh); | |
1452 | if (unlikely(error)) | |
1453 | goto out_uninit; | |
1454 | ||
1455 | if (!gfs2_write_alloc_required(ip, offset, len)) | |
1456 | goto out_unlock; | |
1457 | ||
1458 | while (len > 0) { | |
1459 | if (len < bytes) | |
1460 | bytes = len; | |
1461 | al = gfs2_alloc_get(ip); | |
1462 | if (!al) { | |
1463 | error = -ENOMEM; | |
1464 | goto out_unlock; | |
1465 | } | |
1466 | ||
1467 | error = gfs2_quota_lock_check(ip); | |
1468 | if (error) | |
1469 | goto out_alloc_put; | |
1470 | ||
1471 | retry: | |
1472 | gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks); | |
1473 | ||
1474 | al->al_requested = data_blocks + ind_blocks; | |
1475 | error = gfs2_inplace_reserve(ip); | |
1476 | if (error) { | |
1477 | if (error == -ENOSPC && bytes > sdp->sd_sb.sb_bsize) { | |
1478 | bytes >>= 1; | |
1479 | goto retry; | |
1480 | } | |
1481 | goto out_qunlock; | |
1482 | } | |
1483 | max_bytes = bytes; | |
1484 | calc_max_reserv(ip, len, &max_bytes, &data_blocks, &ind_blocks); | |
1485 | al->al_requested = data_blocks + ind_blocks; | |
1486 | ||
1487 | rblocks = RES_DINODE + ind_blocks + RES_STATFS + RES_QUOTA + | |
bf97b673 | 1488 | RES_RG_HDR + gfs2_rg_blocks(al); |
3921120e BM |
1489 | if (gfs2_is_jdata(ip)) |
1490 | rblocks += data_blocks ? data_blocks : 1; | |
1491 | ||
1492 | error = gfs2_trans_begin(sdp, rblocks, | |
1493 | PAGE_CACHE_SIZE/sdp->sd_sb.sb_bsize); | |
1494 | if (error) | |
1495 | goto out_trans_fail; | |
1496 | ||
1497 | error = fallocate_chunk(inode, offset, max_bytes, mode); | |
1498 | gfs2_trans_end(sdp); | |
1499 | ||
1500 | if (error) | |
1501 | goto out_trans_fail; | |
1502 | ||
1503 | len -= max_bytes; | |
1504 | offset += max_bytes; | |
1505 | gfs2_inplace_release(ip); | |
1506 | gfs2_quota_unlock(ip); | |
1507 | gfs2_alloc_put(ip); | |
1508 | } | |
1509 | goto out_unlock; | |
1510 | ||
1511 | out_trans_fail: | |
1512 | gfs2_inplace_release(ip); | |
1513 | out_qunlock: | |
1514 | gfs2_quota_unlock(ip); | |
1515 | out_alloc_put: | |
1516 | gfs2_alloc_put(ip); | |
1517 | out_unlock: | |
1518 | gfs2_glock_dq(&ip->i_gh); | |
1519 | out_uninit: | |
1520 | gfs2_holder_uninit(&ip->i_gh); | |
1521 | return error; | |
1522 | } | |
1523 | ||
1524 | ||
e9079cce SW |
1525 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1526 | u64 start, u64 len) | |
1527 | { | |
1528 | struct gfs2_inode *ip = GFS2_I(inode); | |
1529 | struct gfs2_holder gh; | |
1530 | int ret; | |
1531 | ||
1532 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1533 | if (ret) | |
1534 | return ret; | |
1535 | ||
1536 | mutex_lock(&inode->i_mutex); | |
1537 | ||
1538 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
1539 | if (ret) | |
1540 | goto out; | |
1541 | ||
1542 | if (gfs2_is_stuffed(ip)) { | |
1543 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
1544 | u64 size = i_size_read(inode); | |
1545 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
1546 | FIEMAP_EXTENT_DATA_INLINE; | |
1547 | phys += sizeof(struct gfs2_dinode); | |
1548 | phys += start; | |
1549 | if (start + len > size) | |
1550 | len = size - start; | |
1551 | if (start < size) | |
1552 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
1553 | len, flags); | |
1554 | if (ret == 1) | |
1555 | ret = 0; | |
1556 | } else { | |
1557 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
1558 | gfs2_block_map); | |
1559 | } | |
1560 | ||
1561 | gfs2_glock_dq_uninit(&gh); | |
1562 | out: | |
1563 | mutex_unlock(&inode->i_mutex); | |
1564 | return ret; | |
1565 | } | |
1566 | ||
92e1d5be | 1567 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 1568 | .permission = gfs2_permission, |
b3b94faa DT |
1569 | .setattr = gfs2_setattr, |
1570 | .getattr = gfs2_getattr, | |
1571 | .setxattr = gfs2_setxattr, | |
1572 | .getxattr = gfs2_getxattr, | |
1573 | .listxattr = gfs2_listxattr, | |
1574 | .removexattr = gfs2_removexattr, | |
3921120e | 1575 | .fallocate = gfs2_fallocate, |
e9079cce | 1576 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1577 | }; |
1578 | ||
92e1d5be | 1579 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1580 | .create = gfs2_create, |
1581 | .lookup = gfs2_lookup, | |
1582 | .link = gfs2_link, | |
1583 | .unlink = gfs2_unlink, | |
1584 | .symlink = gfs2_symlink, | |
1585 | .mkdir = gfs2_mkdir, | |
1586 | .rmdir = gfs2_rmdir, | |
1587 | .mknod = gfs2_mknod, | |
1588 | .rename = gfs2_rename, | |
e6305c43 | 1589 | .permission = gfs2_permission, |
b3b94faa DT |
1590 | .setattr = gfs2_setattr, |
1591 | .getattr = gfs2_getattr, | |
1592 | .setxattr = gfs2_setxattr, | |
1593 | .getxattr = gfs2_getxattr, | |
1594 | .listxattr = gfs2_listxattr, | |
1595 | .removexattr = gfs2_removexattr, | |
e9079cce | 1596 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1597 | }; |
1598 | ||
92e1d5be | 1599 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 1600 | .readlink = generic_readlink, |
b3b94faa | 1601 | .follow_link = gfs2_follow_link, |
c177c2ac | 1602 | .put_link = gfs2_put_link, |
e6305c43 | 1603 | .permission = gfs2_permission, |
b3b94faa DT |
1604 | .setattr = gfs2_setattr, |
1605 | .getattr = gfs2_getattr, | |
1606 | .setxattr = gfs2_setxattr, | |
1607 | .getxattr = gfs2_getxattr, | |
1608 | .listxattr = gfs2_listxattr, | |
1609 | .removexattr = gfs2_removexattr, | |
e9079cce | 1610 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1611 | }; |
1612 |