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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/namei.h> | |
15 | #include <linux/utsname.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/xattr.h> | |
18 | #include <linux/posix_acl.h> | |
5c676f6d | 19 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 20 | #include <linux/crc32.h> |
7d308590 | 21 | #include <linux/lm_interface.h> |
e9079cce | 22 | #include <linux/fiemap.h> |
b3b94faa DT |
23 | #include <asm/uaccess.h> |
24 | ||
25 | #include "gfs2.h" | |
5c676f6d | 26 | #include "incore.h" |
b3b94faa DT |
27 | #include "acl.h" |
28 | #include "bmap.h" | |
29 | #include "dir.h" | |
30 | #include "eaops.h" | |
31 | #include "eattr.h" | |
32 | #include "glock.h" | |
33 | #include "inode.h" | |
34 | #include "meta_io.h" | |
35 | #include "ops_dentry.h" | |
36 | #include "ops_inode.h" | |
b3b94faa DT |
37 | #include "quota.h" |
38 | #include "rgrp.h" | |
39 | #include "trans.h" | |
5c676f6d | 40 | #include "util.h" |
b3b94faa DT |
41 | |
42 | /** | |
43 | * gfs2_create - Create a file | |
44 | * @dir: The directory in which to create the file | |
45 | * @dentry: The dentry of the new file | |
46 | * @mode: The mode of the new file | |
47 | * | |
48 | * Returns: errno | |
49 | */ | |
50 | ||
51 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
52 | int mode, struct nameidata *nd) | |
53 | { | |
feaa7bba SW |
54 | struct gfs2_inode *dip = GFS2_I(dir); |
55 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
56 | struct gfs2_holder ghs[2]; |
57 | struct inode *inode; | |
b3b94faa | 58 | |
b3b94faa DT |
59 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
60 | ||
61 | for (;;) { | |
e7f14f4d | 62 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0); |
7359a19c | 63 | if (!IS_ERR(inode)) { |
b3b94faa | 64 | gfs2_trans_end(sdp); |
6dbd8224 | 65 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
66 | gfs2_inplace_release(dip); |
67 | gfs2_quota_unlock(dip); | |
68 | gfs2_alloc_put(dip); | |
69 | gfs2_glock_dq_uninit_m(2, ghs); | |
3a8476dd | 70 | mark_inode_dirty(inode); |
b3b94faa | 71 | break; |
7359a19c | 72 | } else if (PTR_ERR(inode) != -EEXIST || |
3516586a | 73 | (nd && nd->flags & LOOKUP_EXCL)) { |
b3b94faa | 74 | gfs2_holder_uninit(ghs); |
7359a19c | 75 | return PTR_ERR(inode); |
b3b94faa DT |
76 | } |
77 | ||
a569c711 | 78 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); |
c752666c SW |
79 | if (inode) { |
80 | if (!IS_ERR(inode)) { | |
c752666c SW |
81 | gfs2_holder_uninit(ghs); |
82 | break; | |
83 | } else { | |
84 | gfs2_holder_uninit(ghs); | |
85 | return PTR_ERR(inode); | |
86 | } | |
b3b94faa DT |
87 | } |
88 | } | |
89 | ||
b3b94faa | 90 | d_instantiate(dentry, inode); |
b3b94faa DT |
91 | |
92 | return 0; | |
93 | } | |
94 | ||
95 | /** | |
96 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
97 | * @dir: The directory inode | |
98 | * @dentry: The dentry of the new inode | |
99 | * @nd: passed from Linux VFS, ignored by us | |
100 | * | |
101 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
102 | * | |
103 | * Returns: errno | |
104 | */ | |
105 | ||
106 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
107 | struct nameidata *nd) | |
108 | { | |
b3b94faa | 109 | struct inode *inode = NULL; |
b3b94faa | 110 | |
c752666c | 111 | dentry->d_op = &gfs2_dops; |
b3b94faa | 112 | |
a569c711 | 113 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); |
c752666c | 114 | if (inode && IS_ERR(inode)) |
e231c2ee | 115 | return ERR_CAST(inode); |
b3b94faa | 116 | |
9656b2c1 SW |
117 | if (inode) { |
118 | struct gfs2_glock *gl = GFS2_I(inode)->i_gl; | |
119 | struct gfs2_holder gh; | |
120 | int error; | |
121 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
122 | if (error) { | |
123 | iput(inode); | |
124 | return ERR_PTR(error); | |
125 | } | |
126 | gfs2_glock_dq_uninit(&gh); | |
b3b94faa | 127 | return d_splice_alias(inode, dentry); |
9656b2c1 | 128 | } |
b3b94faa DT |
129 | d_add(dentry, inode); |
130 | ||
131 | return NULL; | |
132 | } | |
133 | ||
134 | /** | |
135 | * gfs2_link - Link to a file | |
136 | * @old_dentry: The inode to link | |
137 | * @dir: Add link to this directory | |
138 | * @dentry: The name of the link | |
139 | * | |
140 | * Link the inode in "old_dentry" into the directory "dir" with the | |
141 | * name in "dentry". | |
142 | * | |
143 | * Returns: errno | |
144 | */ | |
145 | ||
146 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
147 | struct dentry *dentry) | |
148 | { | |
feaa7bba SW |
149 | struct gfs2_inode *dip = GFS2_I(dir); |
150 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa | 151 | struct inode *inode = old_dentry->d_inode; |
feaa7bba | 152 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
153 | struct gfs2_holder ghs[2]; |
154 | int alloc_required; | |
155 | int error; | |
156 | ||
b60623c2 | 157 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
158 | return -EPERM; |
159 | ||
160 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
161 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
162 | ||
72dbf479 BP |
163 | error = gfs2_glock_nq(ghs); /* parent */ |
164 | if (error) | |
165 | goto out_parent; | |
166 | ||
167 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 168 | if (error) |
72dbf479 | 169 | goto out_child; |
b3b94faa | 170 | |
f58ba889 | 171 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
172 | if (error) |
173 | goto out_gunlock; | |
174 | ||
dbb7cae2 | 175 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
176 | switch (error) { |
177 | case -ENOENT: | |
178 | break; | |
179 | case 0: | |
180 | error = -EEXIST; | |
181 | default: | |
182 | goto out_gunlock; | |
183 | } | |
184 | ||
185 | error = -EINVAL; | |
4f56110a | 186 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
187 | goto out_gunlock; |
188 | error = -EFBIG; | |
cd915493 | 189 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa DT |
190 | goto out_gunlock; |
191 | error = -EPERM; | |
192 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
193 | goto out_gunlock; | |
194 | error = -EINVAL; | |
4f56110a | 195 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
196 | goto out_gunlock; |
197 | error = -EMLINK; | |
4f56110a | 198 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
199 | goto out_gunlock; |
200 | ||
c752666c SW |
201 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); |
202 | if (error < 0) | |
b3b94faa | 203 | goto out_gunlock; |
c752666c | 204 | error = 0; |
b3b94faa DT |
205 | |
206 | if (alloc_required) { | |
207 | struct gfs2_alloc *al = gfs2_alloc_get(dip); | |
182fe5ab CG |
208 | if (!al) { |
209 | error = -ENOMEM; | |
210 | goto out_gunlock; | |
211 | } | |
b3b94faa | 212 | |
d82661d9 | 213 | error = gfs2_quota_lock_check(dip); |
b3b94faa DT |
214 | if (error) |
215 | goto out_alloc; | |
216 | ||
b3b94faa DT |
217 | al->al_requested = sdp->sd_max_dirres; |
218 | ||
219 | error = gfs2_inplace_reserve(dip); | |
220 | if (error) | |
221 | goto out_gunlock_q; | |
222 | ||
1b50259b | 223 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 224 | al->al_rgd->rd_length + |
b3b94faa DT |
225 | 2 * RES_DINODE + RES_STATFS + |
226 | RES_QUOTA, 0); | |
227 | if (error) | |
228 | goto out_ipres; | |
229 | } else { | |
230 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
231 | if (error) | |
232 | goto out_ipres; | |
233 | } | |
234 | ||
dbb7cae2 | 235 | error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode)); |
b3b94faa DT |
236 | if (error) |
237 | goto out_end_trans; | |
238 | ||
239 | error = gfs2_change_nlink(ip, +1); | |
240 | ||
feaa7bba | 241 | out_end_trans: |
b3b94faa | 242 | gfs2_trans_end(sdp); |
feaa7bba | 243 | out_ipres: |
b3b94faa DT |
244 | if (alloc_required) |
245 | gfs2_inplace_release(dip); | |
feaa7bba | 246 | out_gunlock_q: |
b3b94faa DT |
247 | if (alloc_required) |
248 | gfs2_quota_unlock(dip); | |
feaa7bba | 249 | out_alloc: |
b3b94faa DT |
250 | if (alloc_required) |
251 | gfs2_alloc_put(dip); | |
feaa7bba | 252 | out_gunlock: |
72dbf479 BP |
253 | gfs2_glock_dq(ghs + 1); |
254 | out_child: | |
255 | gfs2_glock_dq(ghs); | |
256 | out_parent: | |
b3b94faa DT |
257 | gfs2_holder_uninit(ghs); |
258 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa | 259 | if (!error) { |
29937ac6 | 260 | atomic_inc(&inode->i_count); |
b3b94faa DT |
261 | d_instantiate(dentry, inode); |
262 | mark_inode_dirty(inode); | |
263 | } | |
b3b94faa DT |
264 | return error; |
265 | } | |
266 | ||
267 | /** | |
268 | * gfs2_unlink - Unlink a file | |
269 | * @dir: The inode of the directory containing the file to unlink | |
270 | * @dentry: The file itself | |
271 | * | |
272 | * Unlink a file. Call gfs2_unlinki() | |
273 | * | |
274 | * Returns: errno | |
275 | */ | |
276 | ||
277 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
278 | { | |
feaa7bba SW |
279 | struct gfs2_inode *dip = GFS2_I(dir); |
280 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
281 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
282 | struct gfs2_holder ghs[3]; |
283 | struct gfs2_rgrpd *rgd; | |
284 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
285 | int error; |
286 | ||
ddee7608 RC |
287 | error = gfs2_rindex_hold(sdp, &ri_gh); |
288 | if (error) | |
289 | return error; | |
290 | ||
b3b94faa | 291 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 292 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 293 | |
dbb7cae2 | 294 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
295 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
296 | ||
297 | ||
8497a46e | 298 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 299 | if (error) |
8497a46e SW |
300 | goto out_parent; |
301 | ||
302 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
303 | if (error) | |
304 | goto out_child; | |
305 | ||
306 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ | |
307 | if (error) | |
308 | goto out_rgrp; | |
b3b94faa DT |
309 | |
310 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
311 | if (error) | |
72dbf479 | 312 | goto out_gunlock; |
b3b94faa | 313 | |
feaa7bba | 314 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); |
b3b94faa | 315 | if (error) |
8497a46e | 316 | goto out_rgrp; |
b3b94faa | 317 | |
feaa7bba SW |
318 | error = gfs2_dir_del(dip, &dentry->d_name); |
319 | if (error) | |
320 | goto out_end_trans; | |
b3b94faa | 321 | |
feaa7bba | 322 | error = gfs2_change_nlink(ip, -1); |
b3b94faa | 323 | |
feaa7bba SW |
324 | out_end_trans: |
325 | gfs2_trans_end(sdp); | |
72dbf479 | 326 | out_gunlock: |
8497a46e SW |
327 | gfs2_glock_dq(ghs + 2); |
328 | out_rgrp: | |
ddee7608 | 329 | gfs2_holder_uninit(ghs + 2); |
8497a46e SW |
330 | gfs2_glock_dq(ghs + 1); |
331 | out_child: | |
332 | gfs2_holder_uninit(ghs + 1); | |
333 | gfs2_glock_dq(ghs); | |
334 | out_parent: | |
335 | gfs2_holder_uninit(ghs); | |
ddee7608 | 336 | gfs2_glock_dq_uninit(&ri_gh); |
b3b94faa DT |
337 | return error; |
338 | } | |
339 | ||
340 | /** | |
341 | * gfs2_symlink - Create a symlink | |
342 | * @dir: The directory to create the symlink in | |
343 | * @dentry: The dentry to put the symlink in | |
344 | * @symname: The thing which the link points to | |
345 | * | |
346 | * Returns: errno | |
347 | */ | |
348 | ||
349 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
350 | const char *symname) | |
351 | { | |
feaa7bba SW |
352 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
353 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
354 | struct gfs2_holder ghs[2]; |
355 | struct inode *inode; | |
356 | struct buffer_head *dibh; | |
357 | int size; | |
358 | int error; | |
359 | ||
b3b94faa DT |
360 | /* Must be stuffed with a null terminator for gfs2_follow_link() */ |
361 | size = strlen(symname); | |
362 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
363 | return -ENAMETOOLONG; | |
364 | ||
365 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
366 | ||
e7f14f4d | 367 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0); |
7359a19c | 368 | if (IS_ERR(inode)) { |
b3b94faa | 369 | gfs2_holder_uninit(ghs); |
7359a19c | 370 | return PTR_ERR(inode); |
b3b94faa DT |
371 | } |
372 | ||
5c676f6d | 373 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa DT |
374 | |
375 | ip->i_di.di_size = size; | |
376 | ||
377 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
378 | ||
379 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
539e5d6b | 380 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
381 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, |
382 | size); | |
383 | brelse(dibh); | |
384 | } | |
385 | ||
386 | gfs2_trans_end(sdp); | |
6dbd8224 | 387 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
388 | gfs2_inplace_release(dip); |
389 | gfs2_quota_unlock(dip); | |
390 | gfs2_alloc_put(dip); | |
391 | ||
392 | gfs2_glock_dq_uninit_m(2, ghs); | |
393 | ||
b3b94faa DT |
394 | d_instantiate(dentry, inode); |
395 | mark_inode_dirty(inode); | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | /** | |
401 | * gfs2_mkdir - Make a directory | |
402 | * @dir: The parent directory of the new one | |
403 | * @dentry: The dentry of the new directory | |
404 | * @mode: The mode of the new directory | |
405 | * | |
406 | * Returns: errno | |
407 | */ | |
408 | ||
409 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
410 | { | |
feaa7bba SW |
411 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
412 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
413 | struct gfs2_holder ghs[2]; |
414 | struct inode *inode; | |
415 | struct buffer_head *dibh; | |
416 | int error; | |
417 | ||
b3b94faa DT |
418 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
419 | ||
e7f14f4d | 420 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0); |
7359a19c | 421 | if (IS_ERR(inode)) { |
b3b94faa | 422 | gfs2_holder_uninit(ghs); |
7359a19c | 423 | return PTR_ERR(inode); |
b3b94faa DT |
424 | } |
425 | ||
5c676f6d | 426 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa | 427 | |
4f56110a | 428 | ip->i_inode.i_nlink = 2; |
b3b94faa DT |
429 | ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); |
430 | ip->i_di.di_flags |= GFS2_DIF_JDATA; | |
b3b94faa DT |
431 | ip->i_di.di_entries = 2; |
432 | ||
433 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
434 | ||
435 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
436 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
c752666c | 437 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); |
71b86f56 | 438 | struct qstr str; |
b3b94faa | 439 | |
71b86f56 | 440 | gfs2_str2qstr(&str, "."); |
c752666c SW |
441 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
442 | gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent); | |
b3b94faa | 443 | dent->de_inum = di->di_num; /* already GFS2 endian */ |
7ecdb70a | 444 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa DT |
445 | di->di_entries = cpu_to_be32(1); |
446 | ||
71b86f56 | 447 | gfs2_str2qstr(&str, ".."); |
c752666c SW |
448 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); |
449 | gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
b3b94faa | 450 | |
dbb7cae2 | 451 | gfs2_inum_out(dip, dent); |
7ecdb70a | 452 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa | 453 | |
539e5d6b | 454 | gfs2_dinode_out(ip, di); |
b3b94faa DT |
455 | |
456 | brelse(dibh); | |
457 | } | |
458 | ||
459 | error = gfs2_change_nlink(dip, +1); | |
460 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ | |
461 | ||
462 | gfs2_trans_end(sdp); | |
6dbd8224 | 463 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
464 | gfs2_inplace_release(dip); |
465 | gfs2_quota_unlock(dip); | |
466 | gfs2_alloc_put(dip); | |
467 | ||
468 | gfs2_glock_dq_uninit_m(2, ghs); | |
469 | ||
b3b94faa DT |
470 | d_instantiate(dentry, inode); |
471 | mark_inode_dirty(inode); | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | /** | |
477 | * gfs2_rmdir - Remove a directory | |
478 | * @dir: The parent directory of the directory to be removed | |
479 | * @dentry: The dentry of the directory to remove | |
480 | * | |
481 | * Remove a directory. Call gfs2_rmdiri() | |
482 | * | |
483 | * Returns: errno | |
484 | */ | |
485 | ||
486 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) | |
487 | { | |
feaa7bba SW |
488 | struct gfs2_inode *dip = GFS2_I(dir); |
489 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
490 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
491 | struct gfs2_holder ghs[3]; |
492 | struct gfs2_rgrpd *rgd; | |
493 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
494 | int error; |
495 | ||
ddee7608 RC |
496 | error = gfs2_rindex_hold(sdp, &ri_gh); |
497 | if (error) | |
498 | return error; | |
b3b94faa DT |
499 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
500 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
501 | ||
dbb7cae2 | 502 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
503 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
504 | ||
72dbf479 BP |
505 | error = gfs2_glock_nq(ghs); /* parent */ |
506 | if (error) | |
507 | goto out_parent; | |
508 | ||
509 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 510 | if (error) |
72dbf479 BP |
511 | goto out_child; |
512 | ||
513 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ | |
514 | if (error) | |
515 | goto out_rgrp; | |
b3b94faa DT |
516 | |
517 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
518 | if (error) | |
519 | goto out_gunlock; | |
520 | ||
521 | if (ip->i_di.di_entries < 2) { | |
522 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 523 | gfs2_dinode_print(ip); |
b3b94faa DT |
524 | error = -EIO; |
525 | goto out_gunlock; | |
526 | } | |
527 | if (ip->i_di.di_entries > 2) { | |
528 | error = -ENOTEMPTY; | |
529 | goto out_gunlock; | |
530 | } | |
531 | ||
feaa7bba | 532 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
533 | if (error) |
534 | goto out_gunlock; | |
535 | ||
feaa7bba | 536 | error = gfs2_rmdiri(dip, &dentry->d_name, ip); |
b3b94faa DT |
537 | |
538 | gfs2_trans_end(sdp); | |
539 | ||
a91ea69f | 540 | out_gunlock: |
72dbf479 BP |
541 | gfs2_glock_dq(ghs + 2); |
542 | out_rgrp: | |
ddee7608 | 543 | gfs2_holder_uninit(ghs + 2); |
72dbf479 BP |
544 | gfs2_glock_dq(ghs + 1); |
545 | out_child: | |
546 | gfs2_holder_uninit(ghs + 1); | |
547 | gfs2_glock_dq(ghs); | |
548 | out_parent: | |
549 | gfs2_holder_uninit(ghs); | |
ddee7608 | 550 | gfs2_glock_dq_uninit(&ri_gh); |
b3b94faa DT |
551 | return error; |
552 | } | |
553 | ||
554 | /** | |
555 | * gfs2_mknod - Make a special file | |
556 | * @dir: The directory in which the special file will reside | |
557 | * @dentry: The dentry of the special file | |
558 | * @mode: The mode of the special file | |
559 | * @rdev: The device specification of the special file | |
560 | * | |
561 | */ | |
562 | ||
563 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
564 | dev_t dev) | |
565 | { | |
e7f14f4d | 566 | struct gfs2_inode *dip = GFS2_I(dir); |
feaa7bba | 567 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
b3b94faa DT |
568 | struct gfs2_holder ghs[2]; |
569 | struct inode *inode; | |
b3b94faa DT |
570 | |
571 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
572 | ||
e7f14f4d | 573 | inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); |
7359a19c | 574 | if (IS_ERR(inode)) { |
b3b94faa | 575 | gfs2_holder_uninit(ghs); |
7359a19c | 576 | return PTR_ERR(inode); |
b3b94faa DT |
577 | } |
578 | ||
b3b94faa | 579 | gfs2_trans_end(sdp); |
6dbd8224 | 580 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
581 | gfs2_inplace_release(dip); |
582 | gfs2_quota_unlock(dip); | |
583 | gfs2_alloc_put(dip); | |
584 | ||
585 | gfs2_glock_dq_uninit_m(2, ghs); | |
586 | ||
b3b94faa DT |
587 | d_instantiate(dentry, inode); |
588 | mark_inode_dirty(inode); | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
0188d6c5 SW |
593 | /* |
594 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
595 | * @this: move this | |
596 | * @to: to here | |
597 | * | |
598 | * Follow @to back to the root and make sure we don't encounter @this | |
599 | * Assumes we already hold the rename lock. | |
600 | * | |
601 | * Returns: errno | |
602 | */ | |
603 | ||
604 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
605 | { | |
606 | struct inode *dir = &to->i_inode; | |
607 | struct super_block *sb = dir->i_sb; | |
608 | struct inode *tmp; | |
609 | struct qstr dotdot; | |
610 | int error = 0; | |
611 | ||
612 | gfs2_str2qstr(&dotdot, ".."); | |
613 | ||
614 | igrab(dir); | |
615 | ||
616 | for (;;) { | |
617 | if (dir == &this->i_inode) { | |
618 | error = -EINVAL; | |
619 | break; | |
620 | } | |
621 | if (dir == sb->s_root->d_inode) { | |
622 | error = 0; | |
623 | break; | |
624 | } | |
625 | ||
626 | tmp = gfs2_lookupi(dir, &dotdot, 1); | |
627 | if (IS_ERR(tmp)) { | |
628 | error = PTR_ERR(tmp); | |
629 | break; | |
630 | } | |
631 | ||
632 | iput(dir); | |
633 | dir = tmp; | |
634 | } | |
635 | ||
636 | iput(dir); | |
637 | ||
638 | return error; | |
639 | } | |
640 | ||
b3b94faa DT |
641 | /** |
642 | * gfs2_rename - Rename a file | |
643 | * @odir: Parent directory of old file name | |
644 | * @odentry: The old dentry of the file | |
645 | * @ndir: Parent directory of new file name | |
646 | * @ndentry: The new dentry of the file | |
647 | * | |
648 | * Returns: errno | |
649 | */ | |
650 | ||
651 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
652 | struct inode *ndir, struct dentry *ndentry) | |
653 | { | |
feaa7bba SW |
654 | struct gfs2_inode *odip = GFS2_I(odir); |
655 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
656 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 657 | struct gfs2_inode *nip = NULL; |
feaa7bba | 658 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
0188d6c5 | 659 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; |
ddee7608 | 660 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
661 | unsigned int num_gh; |
662 | int dir_rename = 0; | |
663 | int alloc_required; | |
664 | unsigned int x; | |
665 | int error; | |
666 | ||
b3b94faa | 667 | if (ndentry->d_inode) { |
feaa7bba | 668 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
669 | if (ip == nip) |
670 | return 0; | |
671 | } | |
672 | ||
b3b94faa | 673 | |
0188d6c5 SW |
674 | if (odip != ndip) { |
675 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
676 | 0, &r_gh); | |
b3b94faa DT |
677 | if (error) |
678 | goto out; | |
679 | ||
0188d6c5 SW |
680 | if (S_ISDIR(ip->i_inode.i_mode)) { |
681 | dir_rename = 1; | |
682 | /* don't move a dirctory into it's subdir */ | |
683 | error = gfs2_ok_to_move(ip, ndip); | |
684 | if (error) | |
685 | goto out_gunlock_r; | |
686 | } | |
b3b94faa DT |
687 | } |
688 | ||
d9d1ca30 | 689 | num_gh = 1; |
b3b94faa | 690 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
691 | if (odip != ndip) { |
692 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
693 | num_gh++; | |
694 | } | |
695 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
696 | num_gh++; | |
b3b94faa | 697 | |
d9d1ca30 SW |
698 | if (nip) { |
699 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
700 | num_gh++; | |
ddee7608 RC |
701 | /* grab the resource lock for unlink flag twiddling |
702 | * this is the case of the target file already existing | |
703 | * so we unlink before doing the rename | |
704 | */ | |
dbb7cae2 | 705 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); |
ddee7608 RC |
706 | if (nrgd) |
707 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 708 | } |
b3b94faa | 709 | |
72dbf479 BP |
710 | for (x = 0; x < num_gh; x++) { |
711 | error = gfs2_glock_nq(ghs + x); | |
712 | if (error) | |
713 | goto out_gunlock; | |
714 | } | |
b3b94faa DT |
715 | |
716 | /* Check out the old directory */ | |
717 | ||
718 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
719 | if (error) | |
720 | goto out_gunlock; | |
721 | ||
722 | /* Check out the new directory */ | |
723 | ||
724 | if (nip) { | |
725 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
726 | if (error) | |
727 | goto out_gunlock; | |
728 | ||
b60623c2 | 729 | if (S_ISDIR(nip->i_inode.i_mode)) { |
b3b94faa DT |
730 | if (nip->i_di.di_entries < 2) { |
731 | if (gfs2_consist_inode(nip)) | |
4cc14f0b | 732 | gfs2_dinode_print(nip); |
b3b94faa DT |
733 | error = -EIO; |
734 | goto out_gunlock; | |
735 | } | |
736 | if (nip->i_di.di_entries > 2) { | |
737 | error = -ENOTEMPTY; | |
738 | goto out_gunlock; | |
739 | } | |
740 | } | |
741 | } else { | |
f58ba889 | 742 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
743 | if (error) |
744 | goto out_gunlock; | |
745 | ||
dbb7cae2 | 746 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
747 | switch (error) { |
748 | case -ENOENT: | |
749 | error = 0; | |
750 | break; | |
751 | case 0: | |
752 | error = -EEXIST; | |
753 | default: | |
754 | goto out_gunlock; | |
755 | }; | |
756 | ||
757 | if (odip != ndip) { | |
4f56110a | 758 | if (!ndip->i_inode.i_nlink) { |
b3b94faa DT |
759 | error = -EINVAL; |
760 | goto out_gunlock; | |
761 | } | |
cd915493 | 762 | if (ndip->i_di.di_entries == (u32)-1) { |
b3b94faa DT |
763 | error = -EFBIG; |
764 | goto out_gunlock; | |
765 | } | |
b60623c2 | 766 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 767 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
768 | error = -EMLINK; |
769 | goto out_gunlock; | |
770 | } | |
771 | } | |
772 | } | |
773 | ||
774 | /* Check out the dir to be renamed */ | |
775 | ||
776 | if (dir_rename) { | |
f58ba889 | 777 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); |
b3b94faa DT |
778 | if (error) |
779 | goto out_gunlock; | |
780 | } | |
781 | ||
c752666c SW |
782 | alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); |
783 | if (error < 0) | |
b3b94faa | 784 | goto out_gunlock; |
c752666c | 785 | error = 0; |
b3b94faa DT |
786 | |
787 | if (alloc_required) { | |
788 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
182fe5ab CG |
789 | if (!al) { |
790 | error = -ENOMEM; | |
791 | goto out_gunlock; | |
792 | } | |
b3b94faa | 793 | |
d82661d9 | 794 | error = gfs2_quota_lock_check(ndip); |
b3b94faa DT |
795 | if (error) |
796 | goto out_alloc; | |
797 | ||
b3b94faa DT |
798 | al->al_requested = sdp->sd_max_dirres; |
799 | ||
800 | error = gfs2_inplace_reserve(ndip); | |
801 | if (error) | |
802 | goto out_gunlock_q; | |
803 | ||
fe1bdedc | 804 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 805 | al->al_rgd->rd_length + |
b3b94faa | 806 | 4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07 | 807 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
808 | if (error) |
809 | goto out_ipreserv; | |
810 | } else { | |
811 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 812 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
813 | if (error) |
814 | goto out_gunlock; | |
815 | } | |
816 | ||
817 | /* Remove the target file, if it exists */ | |
818 | ||
819 | if (nip) { | |
b60623c2 | 820 | if (S_ISDIR(nip->i_inode.i_mode)) |
feaa7bba SW |
821 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); |
822 | else { | |
823 | error = gfs2_dir_del(ndip, &ndentry->d_name); | |
824 | if (error) | |
825 | goto out_end_trans; | |
87d21e07 | 826 | error = gfs2_change_nlink(nip, -1); |
feaa7bba | 827 | } |
b3b94faa DT |
828 | if (error) |
829 | goto out_end_trans; | |
830 | } | |
831 | ||
832 | if (dir_rename) { | |
833 | struct qstr name; | |
71b86f56 | 834 | gfs2_str2qstr(&name, ".."); |
b3b94faa DT |
835 | |
836 | error = gfs2_change_nlink(ndip, +1); | |
837 | if (error) | |
838 | goto out_end_trans; | |
839 | error = gfs2_change_nlink(odip, -1); | |
840 | if (error) | |
841 | goto out_end_trans; | |
842 | ||
ffed8ab3 | 843 | error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR); |
b3b94faa DT |
844 | if (error) |
845 | goto out_end_trans; | |
846 | } else { | |
847 | struct buffer_head *dibh; | |
848 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
849 | if (error) | |
850 | goto out_end_trans; | |
4bd91ba1 | 851 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 852 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 853 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
854 | brelse(dibh); |
855 | } | |
856 | ||
857 | error = gfs2_dir_del(odip, &odentry->d_name); | |
858 | if (error) | |
859 | goto out_end_trans; | |
860 | ||
dbb7cae2 | 861 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
862 | if (error) |
863 | goto out_end_trans; | |
864 | ||
feaa7bba | 865 | out_end_trans: |
b3b94faa | 866 | gfs2_trans_end(sdp); |
feaa7bba | 867 | out_ipreserv: |
b3b94faa DT |
868 | if (alloc_required) |
869 | gfs2_inplace_release(ndip); | |
feaa7bba | 870 | out_gunlock_q: |
b3b94faa DT |
871 | if (alloc_required) |
872 | gfs2_quota_unlock(ndip); | |
feaa7bba | 873 | out_alloc: |
b3b94faa DT |
874 | if (alloc_required) |
875 | gfs2_alloc_put(ndip); | |
feaa7bba | 876 | out_gunlock: |
72dbf479 BP |
877 | while (x--) { |
878 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 879 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 880 | } |
feaa7bba | 881 | out_gunlock_r: |
0188d6c5 | 882 | if (r_gh.gh_gl) |
b3b94faa | 883 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 884 | out: |
b3b94faa DT |
885 | return error; |
886 | } | |
887 | ||
888 | /** | |
889 | * gfs2_readlink - Read the value of a symlink | |
890 | * @dentry: the symlink | |
891 | * @buf: the buffer to read the symlink data into | |
892 | * @size: the size of the buffer | |
893 | * | |
894 | * Returns: errno | |
895 | */ | |
896 | ||
897 | static int gfs2_readlink(struct dentry *dentry, char __user *user_buf, | |
898 | int user_size) | |
899 | { | |
feaa7bba | 900 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
901 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
902 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
903 | int error; | |
904 | ||
b3b94faa DT |
905 | error = gfs2_readlinki(ip, &buf, &len); |
906 | if (error) | |
907 | return error; | |
908 | ||
909 | if (user_size > len - 1) | |
910 | user_size = len - 1; | |
911 | ||
912 | if (copy_to_user(user_buf, buf, user_size)) | |
913 | error = -EFAULT; | |
914 | else | |
915 | error = user_size; | |
916 | ||
917 | if (buf != array) | |
918 | kfree(buf); | |
919 | ||
920 | return error; | |
921 | } | |
922 | ||
923 | /** | |
924 | * gfs2_follow_link - Follow a symbolic link | |
925 | * @dentry: The dentry of the link | |
926 | * @nd: Data that we pass to vfs_follow_link() | |
927 | * | |
928 | * This can handle symlinks of any size. It is optimised for symlinks | |
929 | * under GFS2_FAST_NAME_SIZE. | |
930 | * | |
931 | * Returns: 0 on success or error code | |
932 | */ | |
933 | ||
934 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) | |
935 | { | |
feaa7bba | 936 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
937 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
938 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
939 | int error; | |
940 | ||
b3b94faa DT |
941 | error = gfs2_readlinki(ip, &buf, &len); |
942 | if (!error) { | |
943 | error = vfs_follow_link(nd, buf); | |
944 | if (buf != array) | |
945 | kfree(buf); | |
946 | } | |
947 | ||
948 | return ERR_PTR(error); | |
949 | } | |
950 | ||
951 | /** | |
952 | * gfs2_permission - | |
953 | * @inode: | |
954 | * @mask: | |
955 | * @nd: passed from Linux VFS, ignored by us | |
956 | * | |
300c7d75 SW |
957 | * This may be called from the VFS directly, or from within GFS2 with the |
958 | * inode locked, so we look to see if the glock is already locked and only | |
959 | * lock the glock if its not already been done. | |
960 | * | |
b3b94faa DT |
961 | * Returns: errno |
962 | */ | |
963 | ||
f58ba889 | 964 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 965 | { |
feaa7bba | 966 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
967 | struct gfs2_holder i_gh; |
968 | int error; | |
300c7d75 | 969 | int unlock = 0; |
b3b94faa | 970 | |
7afd88d9 | 971 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
300c7d75 SW |
972 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
973 | if (error) | |
974 | return error; | |
975 | unlock = 1; | |
976 | } | |
b3b94faa | 977 | |
f58ba889 MS |
978 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
979 | error = -EACCES; | |
980 | else | |
981 | error = generic_permission(inode, mask, gfs2_check_acl); | |
300c7d75 | 982 | if (unlock) |
b3b94faa | 983 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
984 | |
985 | return error; | |
986 | } | |
987 | ||
988 | static int setattr_size(struct inode *inode, struct iattr *attr) | |
989 | { | |
feaa7bba | 990 | struct gfs2_inode *ip = GFS2_I(inode); |
16615be1 | 991 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
b3b94faa DT |
992 | int error; |
993 | ||
994 | if (attr->ia_size != ip->i_di.di_size) { | |
16615be1 | 995 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); |
b3b94faa DT |
996 | if (error) |
997 | return error; | |
16615be1 SW |
998 | error = vmtruncate(inode, attr->ia_size); |
999 | gfs2_trans_end(sdp); | |
1000 | if (error) | |
1001 | return error; | |
b3b94faa DT |
1002 | } |
1003 | ||
aa6a85a9 | 1004 | error = gfs2_truncatei(ip, attr->ia_size); |
090ffaa5 WC |
1005 | if (error && (inode->i_size != ip->i_di.di_size)) |
1006 | i_size_write(inode, ip->i_di.di_size); | |
b3b94faa DT |
1007 | |
1008 | return error; | |
1009 | } | |
1010 | ||
1011 | static int setattr_chown(struct inode *inode, struct iattr *attr) | |
1012 | { | |
feaa7bba SW |
1013 | struct gfs2_inode *ip = GFS2_I(inode); |
1014 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
b3b94faa | 1015 | struct buffer_head *dibh; |
cd915493 | 1016 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
1017 | int error; |
1018 | ||
2933f925 SW |
1019 | ouid = inode->i_uid; |
1020 | ogid = inode->i_gid; | |
b3b94faa DT |
1021 | nuid = attr->ia_uid; |
1022 | ngid = attr->ia_gid; | |
1023 | ||
1024 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
1025 | ouid = nuid = NO_QUOTA_CHANGE; | |
1026 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
1027 | ogid = ngid = NO_QUOTA_CHANGE; | |
1028 | ||
182fe5ab CG |
1029 | if (!gfs2_alloc_get(ip)) |
1030 | return -ENOMEM; | |
b3b94faa DT |
1031 | |
1032 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1033 | if (error) | |
1034 | goto out_alloc; | |
1035 | ||
1036 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
1037 | error = gfs2_quota_check(ip, nuid, ngid); | |
1038 | if (error) | |
1039 | goto out_gunlock_q; | |
1040 | } | |
1041 | ||
1042 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1043 | if (error) | |
1044 | goto out_gunlock_q; | |
1045 | ||
1046 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1047 | if (error) | |
1048 | goto out_end_trans; | |
1049 | ||
1050 | error = inode_setattr(inode, attr); | |
1051 | gfs2_assert_warn(sdp, !error); | |
b3b94faa | 1052 | |
d4e9c4c3 | 1053 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1054 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1055 | brelse(dibh); |
1056 | ||
1057 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
77658aad SW |
1058 | u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); |
1059 | gfs2_quota_change(ip, -blocks, ouid, ogid); | |
1060 | gfs2_quota_change(ip, blocks, nuid, ngid); | |
b3b94faa DT |
1061 | } |
1062 | ||
a91ea69f | 1063 | out_end_trans: |
b3b94faa | 1064 | gfs2_trans_end(sdp); |
a91ea69f | 1065 | out_gunlock_q: |
b3b94faa | 1066 | gfs2_quota_unlock(ip); |
a91ea69f | 1067 | out_alloc: |
b3b94faa | 1068 | gfs2_alloc_put(ip); |
b3b94faa DT |
1069 | return error; |
1070 | } | |
1071 | ||
1072 | /** | |
1073 | * gfs2_setattr - Change attributes on an inode | |
1074 | * @dentry: The dentry which is changing | |
1075 | * @attr: The structure describing the change | |
1076 | * | |
1077 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1078 | * that change out to disk. | |
1079 | * | |
1080 | * Returns: errno | |
1081 | */ | |
1082 | ||
1083 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1084 | { | |
1085 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1086 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1087 | struct gfs2_holder i_gh; |
1088 | int error; | |
1089 | ||
b3b94faa DT |
1090 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1091 | if (error) | |
1092 | return error; | |
1093 | ||
1094 | error = -EPERM; | |
1095 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1096 | goto out; | |
1097 | ||
1098 | error = inode_change_ok(inode, attr); | |
1099 | if (error) | |
1100 | goto out; | |
1101 | ||
1102 | if (attr->ia_valid & ATTR_SIZE) | |
1103 | error = setattr_size(inode, attr); | |
1104 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) | |
1105 | error = setattr_chown(inode, attr); | |
1106 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1107 | error = gfs2_acl_chmod(ip, attr); | |
1108 | else | |
1109 | error = gfs2_setattr_simple(ip, attr); | |
1110 | ||
a91ea69f | 1111 | out: |
b3b94faa | 1112 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1113 | if (!error) |
1114 | mark_inode_dirty(inode); | |
b3b94faa DT |
1115 | return error; |
1116 | } | |
1117 | ||
1118 | /** | |
1119 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1120 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1121 | * @dentry: The dentry to stat |
1122 | * @stat: The inode's stats | |
1123 | * | |
dcf3dd85 SW |
1124 | * This may be called from the VFS directly, or from within GFS2 with the |
1125 | * inode locked, so we look to see if the glock is already locked and only | |
1126 | * lock the glock if its not already been done. Note that its the NFS | |
1127 | * readdirplus operation which causes this to be called (from filldir) | |
1128 | * with the glock already held. | |
1129 | * | |
b3b94faa DT |
1130 | * Returns: errno |
1131 | */ | |
1132 | ||
1133 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1134 | struct kstat *stat) | |
1135 | { | |
1136 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1137 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1138 | struct gfs2_holder gh; |
1139 | int error; | |
dcf3dd85 | 1140 | int unlock = 0; |
b3b94faa | 1141 | |
7afd88d9 | 1142 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
dcf3dd85 SW |
1143 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1144 | if (error) | |
1145 | return error; | |
1146 | unlock = 1; | |
b3b94faa DT |
1147 | } |
1148 | ||
dcf3dd85 | 1149 | generic_fillattr(inode, stat); |
d7c103d0 | 1150 | if (unlock) |
dcf3dd85 SW |
1151 | gfs2_glock_dq_uninit(&gh); |
1152 | ||
1153 | return 0; | |
b3b94faa DT |
1154 | } |
1155 | ||
1156 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1157 | const void *data, size_t size, int flags) | |
1158 | { | |
feaa7bba | 1159 | struct inode *inode = dentry->d_inode; |
b3b94faa DT |
1160 | struct gfs2_ea_request er; |
1161 | ||
b3b94faa DT |
1162 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1163 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1164 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1165 | return -EOPNOTSUPP; | |
1166 | er.er_data = (char *)data; | |
1167 | er.er_name_len = strlen(er.er_name); | |
1168 | er.er_data_len = size; | |
1169 | er.er_flags = flags; | |
1170 | ||
feaa7bba | 1171 | gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE)); |
b3b94faa | 1172 | |
feaa7bba | 1173 | return gfs2_ea_set(GFS2_I(inode), &er); |
b3b94faa DT |
1174 | } |
1175 | ||
1176 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1177 | void *data, size_t size) | |
1178 | { | |
1179 | struct gfs2_ea_request er; | |
1180 | ||
b3b94faa DT |
1181 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1182 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1183 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1184 | return -EOPNOTSUPP; | |
1185 | er.er_data = data; | |
1186 | er.er_name_len = strlen(er.er_name); | |
1187 | er.er_data_len = size; | |
1188 | ||
feaa7bba | 1189 | return gfs2_ea_get(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1190 | } |
1191 | ||
1192 | static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) | |
1193 | { | |
1194 | struct gfs2_ea_request er; | |
1195 | ||
b3b94faa DT |
1196 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1197 | er.er_data = (size) ? buffer : NULL; | |
1198 | er.er_data_len = size; | |
1199 | ||
feaa7bba | 1200 | return gfs2_ea_list(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1201 | } |
1202 | ||
1203 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1204 | { | |
1205 | struct gfs2_ea_request er; | |
1206 | ||
b3b94faa DT |
1207 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1208 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1209 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1210 | return -EOPNOTSUPP; | |
1211 | er.er_name_len = strlen(er.er_name); | |
1212 | ||
feaa7bba | 1213 | return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1214 | } |
1215 | ||
e9079cce SW |
1216 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1217 | u64 start, u64 len) | |
1218 | { | |
1219 | struct gfs2_inode *ip = GFS2_I(inode); | |
1220 | struct gfs2_holder gh; | |
1221 | int ret; | |
1222 | ||
1223 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1224 | if (ret) | |
1225 | return ret; | |
1226 | ||
1227 | mutex_lock(&inode->i_mutex); | |
1228 | ||
1229 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
1230 | if (ret) | |
1231 | goto out; | |
1232 | ||
1233 | if (gfs2_is_stuffed(ip)) { | |
1234 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
1235 | u64 size = i_size_read(inode); | |
1236 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
1237 | FIEMAP_EXTENT_DATA_INLINE; | |
1238 | phys += sizeof(struct gfs2_dinode); | |
1239 | phys += start; | |
1240 | if (start + len > size) | |
1241 | len = size - start; | |
1242 | if (start < size) | |
1243 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
1244 | len, flags); | |
1245 | if (ret == 1) | |
1246 | ret = 0; | |
1247 | } else { | |
1248 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
1249 | gfs2_block_map); | |
1250 | } | |
1251 | ||
1252 | gfs2_glock_dq_uninit(&gh); | |
1253 | out: | |
1254 | mutex_unlock(&inode->i_mutex); | |
1255 | return ret; | |
1256 | } | |
1257 | ||
92e1d5be | 1258 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 1259 | .permission = gfs2_permission, |
b3b94faa DT |
1260 | .setattr = gfs2_setattr, |
1261 | .getattr = gfs2_getattr, | |
1262 | .setxattr = gfs2_setxattr, | |
1263 | .getxattr = gfs2_getxattr, | |
1264 | .listxattr = gfs2_listxattr, | |
1265 | .removexattr = gfs2_removexattr, | |
e9079cce | 1266 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1267 | }; |
1268 | ||
92e1d5be | 1269 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1270 | .create = gfs2_create, |
1271 | .lookup = gfs2_lookup, | |
1272 | .link = gfs2_link, | |
1273 | .unlink = gfs2_unlink, | |
1274 | .symlink = gfs2_symlink, | |
1275 | .mkdir = gfs2_mkdir, | |
1276 | .rmdir = gfs2_rmdir, | |
1277 | .mknod = gfs2_mknod, | |
1278 | .rename = gfs2_rename, | |
e6305c43 | 1279 | .permission = gfs2_permission, |
b3b94faa DT |
1280 | .setattr = gfs2_setattr, |
1281 | .getattr = gfs2_getattr, | |
1282 | .setxattr = gfs2_setxattr, | |
1283 | .getxattr = gfs2_getxattr, | |
1284 | .listxattr = gfs2_listxattr, | |
1285 | .removexattr = gfs2_removexattr, | |
e9079cce | 1286 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1287 | }; |
1288 | ||
92e1d5be | 1289 | const struct inode_operations gfs2_symlink_iops = { |
b3b94faa DT |
1290 | .readlink = gfs2_readlink, |
1291 | .follow_link = gfs2_follow_link, | |
e6305c43 | 1292 | .permission = gfs2_permission, |
b3b94faa DT |
1293 | .setattr = gfs2_setattr, |
1294 | .getattr = gfs2_getattr, | |
1295 | .setxattr = gfs2_setxattr, | |
1296 | .getxattr = gfs2_getxattr, | |
1297 | .listxattr = gfs2_listxattr, | |
1298 | .removexattr = gfs2_removexattr, | |
e9079cce | 1299 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
1300 | }; |
1301 |