Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/namei.h> | |
15 | #include <linux/utsname.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/xattr.h> | |
18 | #include <linux/posix_acl.h> | |
5c676f6d | 19 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 20 | #include <linux/crc32.h> |
7d308590 | 21 | #include <linux/lm_interface.h> |
b3b94faa DT |
22 | #include <asm/uaccess.h> |
23 | ||
24 | #include "gfs2.h" | |
5c676f6d | 25 | #include "incore.h" |
b3b94faa DT |
26 | #include "acl.h" |
27 | #include "bmap.h" | |
28 | #include "dir.h" | |
29 | #include "eaops.h" | |
30 | #include "eattr.h" | |
31 | #include "glock.h" | |
32 | #include "inode.h" | |
33 | #include "meta_io.h" | |
34 | #include "ops_dentry.h" | |
35 | #include "ops_inode.h" | |
b3b94faa DT |
36 | #include "quota.h" |
37 | #include "rgrp.h" | |
38 | #include "trans.h" | |
5c676f6d | 39 | #include "util.h" |
b3b94faa DT |
40 | |
41 | /** | |
42 | * gfs2_create - Create a file | |
43 | * @dir: The directory in which to create the file | |
44 | * @dentry: The dentry of the new file | |
45 | * @mode: The mode of the new file | |
46 | * | |
47 | * Returns: errno | |
48 | */ | |
49 | ||
50 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
51 | int mode, struct nameidata *nd) | |
52 | { | |
feaa7bba SW |
53 | struct gfs2_inode *dip = GFS2_I(dir); |
54 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
55 | struct gfs2_holder ghs[2]; |
56 | struct inode *inode; | |
b3b94faa | 57 | |
b3b94faa DT |
58 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
59 | ||
60 | for (;;) { | |
e7f14f4d | 61 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0); |
7359a19c | 62 | if (!IS_ERR(inode)) { |
b3b94faa | 63 | gfs2_trans_end(sdp); |
6dbd8224 | 64 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
65 | gfs2_inplace_release(dip); |
66 | gfs2_quota_unlock(dip); | |
67 | gfs2_alloc_put(dip); | |
68 | gfs2_glock_dq_uninit_m(2, ghs); | |
3a8476dd | 69 | mark_inode_dirty(inode); |
b3b94faa | 70 | break; |
7359a19c | 71 | } else if (PTR_ERR(inode) != -EEXIST || |
afd0942d | 72 | (nd && (nd->intent.open.flags & O_EXCL))) { |
b3b94faa | 73 | gfs2_holder_uninit(ghs); |
7359a19c | 74 | return PTR_ERR(inode); |
b3b94faa DT |
75 | } |
76 | ||
c752666c SW |
77 | inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); |
78 | if (inode) { | |
79 | if (!IS_ERR(inode)) { | |
c752666c SW |
80 | gfs2_holder_uninit(ghs); |
81 | break; | |
82 | } else { | |
83 | gfs2_holder_uninit(ghs); | |
84 | return PTR_ERR(inode); | |
85 | } | |
b3b94faa DT |
86 | } |
87 | } | |
88 | ||
b3b94faa | 89 | d_instantiate(dentry, inode); |
b3b94faa DT |
90 | |
91 | return 0; | |
92 | } | |
93 | ||
94 | /** | |
95 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
96 | * @dir: The directory inode | |
97 | * @dentry: The dentry of the new inode | |
98 | * @nd: passed from Linux VFS, ignored by us | |
99 | * | |
100 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
101 | * | |
102 | * Returns: errno | |
103 | */ | |
104 | ||
105 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
106 | struct nameidata *nd) | |
107 | { | |
b3b94faa | 108 | struct inode *inode = NULL; |
b3b94faa | 109 | |
c752666c | 110 | dentry->d_op = &gfs2_dops; |
b3b94faa | 111 | |
c752666c SW |
112 | inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); |
113 | if (inode && IS_ERR(inode)) | |
e231c2ee | 114 | return ERR_CAST(inode); |
b3b94faa | 115 | |
9656b2c1 SW |
116 | if (inode) { |
117 | struct gfs2_glock *gl = GFS2_I(inode)->i_gl; | |
118 | struct gfs2_holder gh; | |
119 | int error; | |
120 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
121 | if (error) { | |
122 | iput(inode); | |
123 | return ERR_PTR(error); | |
124 | } | |
125 | gfs2_glock_dq_uninit(&gh); | |
b3b94faa | 126 | return d_splice_alias(inode, dentry); |
9656b2c1 | 127 | } |
b3b94faa DT |
128 | d_add(dentry, inode); |
129 | ||
130 | return NULL; | |
131 | } | |
132 | ||
133 | /** | |
134 | * gfs2_link - Link to a file | |
135 | * @old_dentry: The inode to link | |
136 | * @dir: Add link to this directory | |
137 | * @dentry: The name of the link | |
138 | * | |
139 | * Link the inode in "old_dentry" into the directory "dir" with the | |
140 | * name in "dentry". | |
141 | * | |
142 | * Returns: errno | |
143 | */ | |
144 | ||
145 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
146 | struct dentry *dentry) | |
147 | { | |
feaa7bba SW |
148 | struct gfs2_inode *dip = GFS2_I(dir); |
149 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa | 150 | struct inode *inode = old_dentry->d_inode; |
feaa7bba | 151 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
152 | struct gfs2_holder ghs[2]; |
153 | int alloc_required; | |
154 | int error; | |
155 | ||
b60623c2 | 156 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
157 | return -EPERM; |
158 | ||
159 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
160 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
161 | ||
162 | error = gfs2_glock_nq_m(2, ghs); | |
163 | if (error) | |
164 | goto out; | |
165 | ||
faf450ef | 166 | error = permission(dir, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
167 | if (error) |
168 | goto out_gunlock; | |
169 | ||
dbb7cae2 | 170 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
171 | switch (error) { |
172 | case -ENOENT: | |
173 | break; | |
174 | case 0: | |
175 | error = -EEXIST; | |
176 | default: | |
177 | goto out_gunlock; | |
178 | } | |
179 | ||
180 | error = -EINVAL; | |
4f56110a | 181 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
182 | goto out_gunlock; |
183 | error = -EFBIG; | |
cd915493 | 184 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa DT |
185 | goto out_gunlock; |
186 | error = -EPERM; | |
187 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
188 | goto out_gunlock; | |
189 | error = -EINVAL; | |
4f56110a | 190 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
191 | goto out_gunlock; |
192 | error = -EMLINK; | |
4f56110a | 193 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
194 | goto out_gunlock; |
195 | ||
c752666c SW |
196 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); |
197 | if (error < 0) | |
b3b94faa | 198 | goto out_gunlock; |
c752666c | 199 | error = 0; |
b3b94faa DT |
200 | |
201 | if (alloc_required) { | |
202 | struct gfs2_alloc *al = gfs2_alloc_get(dip); | |
203 | ||
204 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
205 | if (error) | |
206 | goto out_alloc; | |
207 | ||
2933f925 | 208 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
209 | if (error) |
210 | goto out_gunlock_q; | |
211 | ||
212 | al->al_requested = sdp->sd_max_dirres; | |
213 | ||
214 | error = gfs2_inplace_reserve(dip); | |
215 | if (error) | |
216 | goto out_gunlock_q; | |
217 | ||
1b50259b | 218 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 219 | al->al_rgd->rd_length + |
b3b94faa DT |
220 | 2 * RES_DINODE + RES_STATFS + |
221 | RES_QUOTA, 0); | |
222 | if (error) | |
223 | goto out_ipres; | |
224 | } else { | |
225 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
226 | if (error) | |
227 | goto out_ipres; | |
228 | } | |
229 | ||
dbb7cae2 | 230 | error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode)); |
b3b94faa DT |
231 | if (error) |
232 | goto out_end_trans; | |
233 | ||
234 | error = gfs2_change_nlink(ip, +1); | |
235 | ||
feaa7bba | 236 | out_end_trans: |
b3b94faa | 237 | gfs2_trans_end(sdp); |
feaa7bba | 238 | out_ipres: |
b3b94faa DT |
239 | if (alloc_required) |
240 | gfs2_inplace_release(dip); | |
feaa7bba | 241 | out_gunlock_q: |
b3b94faa DT |
242 | if (alloc_required) |
243 | gfs2_quota_unlock(dip); | |
feaa7bba | 244 | out_alloc: |
b3b94faa DT |
245 | if (alloc_required) |
246 | gfs2_alloc_put(dip); | |
feaa7bba | 247 | out_gunlock: |
b3b94faa | 248 | gfs2_glock_dq_m(2, ghs); |
feaa7bba | 249 | out: |
b3b94faa DT |
250 | gfs2_holder_uninit(ghs); |
251 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa | 252 | if (!error) { |
29937ac6 | 253 | atomic_inc(&inode->i_count); |
b3b94faa DT |
254 | d_instantiate(dentry, inode); |
255 | mark_inode_dirty(inode); | |
256 | } | |
b3b94faa DT |
257 | return error; |
258 | } | |
259 | ||
260 | /** | |
261 | * gfs2_unlink - Unlink a file | |
262 | * @dir: The inode of the directory containing the file to unlink | |
263 | * @dentry: The file itself | |
264 | * | |
265 | * Unlink a file. Call gfs2_unlinki() | |
266 | * | |
267 | * Returns: errno | |
268 | */ | |
269 | ||
270 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
271 | { | |
feaa7bba SW |
272 | struct gfs2_inode *dip = GFS2_I(dir); |
273 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
274 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
275 | struct gfs2_holder ghs[3]; |
276 | struct gfs2_rgrpd *rgd; | |
277 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
278 | int error; |
279 | ||
ddee7608 RC |
280 | error = gfs2_rindex_hold(sdp, &ri_gh); |
281 | if (error) | |
282 | return error; | |
283 | ||
b3b94faa | 284 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 285 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 286 | |
dbb7cae2 | 287 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
288 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
289 | ||
290 | ||
8497a46e | 291 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 292 | if (error) |
8497a46e SW |
293 | goto out_parent; |
294 | ||
295 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
296 | if (error) | |
297 | goto out_child; | |
298 | ||
299 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ | |
300 | if (error) | |
301 | goto out_rgrp; | |
b3b94faa DT |
302 | |
303 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
304 | if (error) | |
8497a46e | 305 | goto out_rgrp; |
b3b94faa | 306 | |
feaa7bba | 307 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); |
b3b94faa | 308 | if (error) |
8497a46e | 309 | goto out_rgrp; |
b3b94faa | 310 | |
feaa7bba SW |
311 | error = gfs2_dir_del(dip, &dentry->d_name); |
312 | if (error) | |
313 | goto out_end_trans; | |
b3b94faa | 314 | |
feaa7bba | 315 | error = gfs2_change_nlink(ip, -1); |
b3b94faa | 316 | |
feaa7bba SW |
317 | out_end_trans: |
318 | gfs2_trans_end(sdp); | |
8497a46e SW |
319 | gfs2_glock_dq(ghs + 2); |
320 | out_rgrp: | |
ddee7608 | 321 | gfs2_holder_uninit(ghs + 2); |
8497a46e SW |
322 | gfs2_glock_dq(ghs + 1); |
323 | out_child: | |
324 | gfs2_holder_uninit(ghs + 1); | |
325 | gfs2_glock_dq(ghs); | |
326 | out_parent: | |
327 | gfs2_holder_uninit(ghs); | |
ddee7608 | 328 | gfs2_glock_dq_uninit(&ri_gh); |
b3b94faa DT |
329 | return error; |
330 | } | |
331 | ||
332 | /** | |
333 | * gfs2_symlink - Create a symlink | |
334 | * @dir: The directory to create the symlink in | |
335 | * @dentry: The dentry to put the symlink in | |
336 | * @symname: The thing which the link points to | |
337 | * | |
338 | * Returns: errno | |
339 | */ | |
340 | ||
341 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
342 | const char *symname) | |
343 | { | |
feaa7bba SW |
344 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
345 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
346 | struct gfs2_holder ghs[2]; |
347 | struct inode *inode; | |
348 | struct buffer_head *dibh; | |
349 | int size; | |
350 | int error; | |
351 | ||
b3b94faa DT |
352 | /* Must be stuffed with a null terminator for gfs2_follow_link() */ |
353 | size = strlen(symname); | |
354 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
355 | return -ENAMETOOLONG; | |
356 | ||
357 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
358 | ||
e7f14f4d | 359 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0); |
7359a19c | 360 | if (IS_ERR(inode)) { |
b3b94faa | 361 | gfs2_holder_uninit(ghs); |
7359a19c | 362 | return PTR_ERR(inode); |
b3b94faa DT |
363 | } |
364 | ||
5c676f6d | 365 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa DT |
366 | |
367 | ip->i_di.di_size = size; | |
368 | ||
369 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
370 | ||
371 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
539e5d6b | 372 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
373 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, |
374 | size); | |
375 | brelse(dibh); | |
376 | } | |
377 | ||
378 | gfs2_trans_end(sdp); | |
6dbd8224 | 379 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
380 | gfs2_inplace_release(dip); |
381 | gfs2_quota_unlock(dip); | |
382 | gfs2_alloc_put(dip); | |
383 | ||
384 | gfs2_glock_dq_uninit_m(2, ghs); | |
385 | ||
b3b94faa DT |
386 | d_instantiate(dentry, inode); |
387 | mark_inode_dirty(inode); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | /** | |
393 | * gfs2_mkdir - Make a directory | |
394 | * @dir: The parent directory of the new one | |
395 | * @dentry: The dentry of the new directory | |
396 | * @mode: The mode of the new directory | |
397 | * | |
398 | * Returns: errno | |
399 | */ | |
400 | ||
401 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
402 | { | |
feaa7bba SW |
403 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
404 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa DT |
405 | struct gfs2_holder ghs[2]; |
406 | struct inode *inode; | |
407 | struct buffer_head *dibh; | |
408 | int error; | |
409 | ||
b3b94faa DT |
410 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
411 | ||
e7f14f4d | 412 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0); |
7359a19c | 413 | if (IS_ERR(inode)) { |
b3b94faa | 414 | gfs2_holder_uninit(ghs); |
7359a19c | 415 | return PTR_ERR(inode); |
b3b94faa DT |
416 | } |
417 | ||
5c676f6d | 418 | ip = ghs[1].gh_gl->gl_object; |
b3b94faa | 419 | |
4f56110a | 420 | ip->i_inode.i_nlink = 2; |
b3b94faa DT |
421 | ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); |
422 | ip->i_di.di_flags |= GFS2_DIF_JDATA; | |
b3b94faa DT |
423 | ip->i_di.di_entries = 2; |
424 | ||
425 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
426 | ||
427 | if (!gfs2_assert_withdraw(sdp, !error)) { | |
428 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
c752666c | 429 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); |
71b86f56 | 430 | struct qstr str; |
b3b94faa | 431 | |
71b86f56 | 432 | gfs2_str2qstr(&str, "."); |
c752666c SW |
433 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
434 | gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent); | |
b3b94faa | 435 | dent->de_inum = di->di_num; /* already GFS2 endian */ |
7ecdb70a | 436 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa DT |
437 | di->di_entries = cpu_to_be32(1); |
438 | ||
71b86f56 | 439 | gfs2_str2qstr(&str, ".."); |
c752666c SW |
440 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); |
441 | gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
b3b94faa | 442 | |
dbb7cae2 | 443 | gfs2_inum_out(dip, dent); |
7ecdb70a | 444 | dent->de_type = cpu_to_be16(DT_DIR); |
b3b94faa | 445 | |
539e5d6b | 446 | gfs2_dinode_out(ip, di); |
b3b94faa DT |
447 | |
448 | brelse(dibh); | |
449 | } | |
450 | ||
451 | error = gfs2_change_nlink(dip, +1); | |
452 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ | |
453 | ||
454 | gfs2_trans_end(sdp); | |
6dbd8224 | 455 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
456 | gfs2_inplace_release(dip); |
457 | gfs2_quota_unlock(dip); | |
458 | gfs2_alloc_put(dip); | |
459 | ||
460 | gfs2_glock_dq_uninit_m(2, ghs); | |
461 | ||
b3b94faa DT |
462 | d_instantiate(dentry, inode); |
463 | mark_inode_dirty(inode); | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | /** | |
469 | * gfs2_rmdir - Remove a directory | |
470 | * @dir: The parent directory of the directory to be removed | |
471 | * @dentry: The dentry of the directory to remove | |
472 | * | |
473 | * Remove a directory. Call gfs2_rmdiri() | |
474 | * | |
475 | * Returns: errno | |
476 | */ | |
477 | ||
478 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) | |
479 | { | |
feaa7bba SW |
480 | struct gfs2_inode *dip = GFS2_I(dir); |
481 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
482 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); | |
ddee7608 RC |
483 | struct gfs2_holder ghs[3]; |
484 | struct gfs2_rgrpd *rgd; | |
485 | struct gfs2_holder ri_gh; | |
b3b94faa DT |
486 | int error; |
487 | ||
ddee7608 RC |
488 | |
489 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
490 | if (error) | |
491 | return error; | |
b3b94faa DT |
492 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
493 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
494 | ||
dbb7cae2 | 495 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
496 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
497 | ||
498 | error = gfs2_glock_nq_m(3, ghs); | |
b3b94faa DT |
499 | if (error) |
500 | goto out; | |
501 | ||
502 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
503 | if (error) | |
504 | goto out_gunlock; | |
505 | ||
506 | if (ip->i_di.di_entries < 2) { | |
507 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 508 | gfs2_dinode_print(ip); |
b3b94faa DT |
509 | error = -EIO; |
510 | goto out_gunlock; | |
511 | } | |
512 | if (ip->i_di.di_entries > 2) { | |
513 | error = -ENOTEMPTY; | |
514 | goto out_gunlock; | |
515 | } | |
516 | ||
feaa7bba | 517 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); |
b3b94faa DT |
518 | if (error) |
519 | goto out_gunlock; | |
520 | ||
feaa7bba | 521 | error = gfs2_rmdiri(dip, &dentry->d_name, ip); |
b3b94faa DT |
522 | |
523 | gfs2_trans_end(sdp); | |
524 | ||
a91ea69f | 525 | out_gunlock: |
ddee7608 | 526 | gfs2_glock_dq_m(3, ghs); |
a91ea69f | 527 | out: |
b3b94faa DT |
528 | gfs2_holder_uninit(ghs); |
529 | gfs2_holder_uninit(ghs + 1); | |
ddee7608 RC |
530 | gfs2_holder_uninit(ghs + 2); |
531 | gfs2_glock_dq_uninit(&ri_gh); | |
b3b94faa DT |
532 | return error; |
533 | } | |
534 | ||
535 | /** | |
536 | * gfs2_mknod - Make a special file | |
537 | * @dir: The directory in which the special file will reside | |
538 | * @dentry: The dentry of the special file | |
539 | * @mode: The mode of the special file | |
540 | * @rdev: The device specification of the special file | |
541 | * | |
542 | */ | |
543 | ||
544 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
545 | dev_t dev) | |
546 | { | |
e7f14f4d | 547 | struct gfs2_inode *dip = GFS2_I(dir); |
feaa7bba | 548 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
b3b94faa DT |
549 | struct gfs2_holder ghs[2]; |
550 | struct inode *inode; | |
b3b94faa DT |
551 | |
552 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); | |
553 | ||
e7f14f4d | 554 | inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); |
7359a19c | 555 | if (IS_ERR(inode)) { |
b3b94faa | 556 | gfs2_holder_uninit(ghs); |
7359a19c | 557 | return PTR_ERR(inode); |
b3b94faa DT |
558 | } |
559 | ||
b3b94faa | 560 | gfs2_trans_end(sdp); |
6dbd8224 | 561 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
562 | gfs2_inplace_release(dip); |
563 | gfs2_quota_unlock(dip); | |
564 | gfs2_alloc_put(dip); | |
565 | ||
566 | gfs2_glock_dq_uninit_m(2, ghs); | |
567 | ||
b3b94faa DT |
568 | d_instantiate(dentry, inode); |
569 | mark_inode_dirty(inode); | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | /** | |
575 | * gfs2_rename - Rename a file | |
576 | * @odir: Parent directory of old file name | |
577 | * @odentry: The old dentry of the file | |
578 | * @ndir: Parent directory of new file name | |
579 | * @ndentry: The new dentry of the file | |
580 | * | |
581 | * Returns: errno | |
582 | */ | |
583 | ||
584 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
585 | struct inode *ndir, struct dentry *ndentry) | |
586 | { | |
feaa7bba SW |
587 | struct gfs2_inode *odip = GFS2_I(odir); |
588 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
589 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 590 | struct gfs2_inode *nip = NULL; |
feaa7bba | 591 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
ddee7608 RC |
592 | struct gfs2_holder ghs[5], r_gh; |
593 | struct gfs2_rgrpd *nrgd; | |
b3b94faa DT |
594 | unsigned int num_gh; |
595 | int dir_rename = 0; | |
596 | int alloc_required; | |
597 | unsigned int x; | |
598 | int error; | |
599 | ||
b3b94faa | 600 | if (ndentry->d_inode) { |
feaa7bba | 601 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
602 | if (ip == nip) |
603 | return 0; | |
604 | } | |
605 | ||
b3b94faa DT |
606 | /* Make sure we aren't trying to move a dirctory into it's subdir */ |
607 | ||
b60623c2 | 608 | if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) { |
b3b94faa DT |
609 | dir_rename = 1; |
610 | ||
b60623c2 | 611 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
612 | &r_gh); |
613 | if (error) | |
614 | goto out; | |
615 | ||
616 | error = gfs2_ok_to_move(ip, ndip); | |
617 | if (error) | |
618 | goto out_gunlock_r; | |
619 | } | |
620 | ||
d9d1ca30 | 621 | num_gh = 1; |
b3b94faa | 622 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
623 | if (odip != ndip) { |
624 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
625 | num_gh++; | |
626 | } | |
627 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
628 | num_gh++; | |
b3b94faa | 629 | |
d9d1ca30 SW |
630 | if (nip) { |
631 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
632 | num_gh++; | |
ddee7608 RC |
633 | /* grab the resource lock for unlink flag twiddling |
634 | * this is the case of the target file already existing | |
635 | * so we unlink before doing the rename | |
636 | */ | |
dbb7cae2 | 637 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); |
ddee7608 RC |
638 | if (nrgd) |
639 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 640 | } |
b3b94faa DT |
641 | |
642 | error = gfs2_glock_nq_m(num_gh, ghs); | |
643 | if (error) | |
644 | goto out_uninit; | |
645 | ||
646 | /* Check out the old directory */ | |
647 | ||
648 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
649 | if (error) | |
650 | goto out_gunlock; | |
651 | ||
652 | /* Check out the new directory */ | |
653 | ||
654 | if (nip) { | |
655 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
656 | if (error) | |
657 | goto out_gunlock; | |
658 | ||
b60623c2 | 659 | if (S_ISDIR(nip->i_inode.i_mode)) { |
b3b94faa DT |
660 | if (nip->i_di.di_entries < 2) { |
661 | if (gfs2_consist_inode(nip)) | |
4cc14f0b | 662 | gfs2_dinode_print(nip); |
b3b94faa DT |
663 | error = -EIO; |
664 | goto out_gunlock; | |
665 | } | |
666 | if (nip->i_di.di_entries > 2) { | |
667 | error = -ENOTEMPTY; | |
668 | goto out_gunlock; | |
669 | } | |
670 | } | |
671 | } else { | |
faf450ef | 672 | error = permission(ndir, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
673 | if (error) |
674 | goto out_gunlock; | |
675 | ||
dbb7cae2 | 676 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
677 | switch (error) { |
678 | case -ENOENT: | |
679 | error = 0; | |
680 | break; | |
681 | case 0: | |
682 | error = -EEXIST; | |
683 | default: | |
684 | goto out_gunlock; | |
685 | }; | |
686 | ||
687 | if (odip != ndip) { | |
4f56110a | 688 | if (!ndip->i_inode.i_nlink) { |
b3b94faa DT |
689 | error = -EINVAL; |
690 | goto out_gunlock; | |
691 | } | |
cd915493 | 692 | if (ndip->i_di.di_entries == (u32)-1) { |
b3b94faa DT |
693 | error = -EFBIG; |
694 | goto out_gunlock; | |
695 | } | |
b60623c2 | 696 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 697 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
698 | error = -EMLINK; |
699 | goto out_gunlock; | |
700 | } | |
701 | } | |
702 | } | |
703 | ||
704 | /* Check out the dir to be renamed */ | |
705 | ||
706 | if (dir_rename) { | |
faf450ef | 707 | error = permission(odentry->d_inode, MAY_WRITE, NULL); |
b3b94faa DT |
708 | if (error) |
709 | goto out_gunlock; | |
710 | } | |
711 | ||
c752666c SW |
712 | alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); |
713 | if (error < 0) | |
b3b94faa | 714 | goto out_gunlock; |
c752666c | 715 | error = 0; |
b3b94faa DT |
716 | |
717 | if (alloc_required) { | |
718 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
719 | ||
720 | error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
721 | if (error) | |
722 | goto out_alloc; | |
723 | ||
2933f925 | 724 | error = gfs2_quota_check(ndip, ndip->i_inode.i_uid, ndip->i_inode.i_gid); |
b3b94faa DT |
725 | if (error) |
726 | goto out_gunlock_q; | |
727 | ||
728 | al->al_requested = sdp->sd_max_dirres; | |
729 | ||
730 | error = gfs2_inplace_reserve(ndip); | |
731 | if (error) | |
732 | goto out_gunlock_q; | |
733 | ||
fe1bdedc | 734 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 735 | al->al_rgd->rd_length + |
b3b94faa | 736 | 4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07 | 737 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
738 | if (error) |
739 | goto out_ipreserv; | |
740 | } else { | |
741 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 742 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
743 | if (error) |
744 | goto out_gunlock; | |
745 | } | |
746 | ||
747 | /* Remove the target file, if it exists */ | |
748 | ||
749 | if (nip) { | |
b60623c2 | 750 | if (S_ISDIR(nip->i_inode.i_mode)) |
feaa7bba SW |
751 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); |
752 | else { | |
753 | error = gfs2_dir_del(ndip, &ndentry->d_name); | |
754 | if (error) | |
755 | goto out_end_trans; | |
87d21e07 | 756 | error = gfs2_change_nlink(nip, -1); |
feaa7bba | 757 | } |
b3b94faa DT |
758 | if (error) |
759 | goto out_end_trans; | |
760 | } | |
761 | ||
762 | if (dir_rename) { | |
763 | struct qstr name; | |
71b86f56 | 764 | gfs2_str2qstr(&name, ".."); |
b3b94faa DT |
765 | |
766 | error = gfs2_change_nlink(ndip, +1); | |
767 | if (error) | |
768 | goto out_end_trans; | |
769 | error = gfs2_change_nlink(odip, -1); | |
770 | if (error) | |
771 | goto out_end_trans; | |
772 | ||
ffed8ab3 | 773 | error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR); |
b3b94faa DT |
774 | if (error) |
775 | goto out_end_trans; | |
776 | } else { | |
777 | struct buffer_head *dibh; | |
778 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
779 | if (error) | |
780 | goto out_end_trans; | |
4bd91ba1 | 781 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 782 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 783 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
784 | brelse(dibh); |
785 | } | |
786 | ||
787 | error = gfs2_dir_del(odip, &odentry->d_name); | |
788 | if (error) | |
789 | goto out_end_trans; | |
790 | ||
dbb7cae2 | 791 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
792 | if (error) |
793 | goto out_end_trans; | |
794 | ||
feaa7bba | 795 | out_end_trans: |
b3b94faa | 796 | gfs2_trans_end(sdp); |
feaa7bba | 797 | out_ipreserv: |
b3b94faa DT |
798 | if (alloc_required) |
799 | gfs2_inplace_release(ndip); | |
feaa7bba | 800 | out_gunlock_q: |
b3b94faa DT |
801 | if (alloc_required) |
802 | gfs2_quota_unlock(ndip); | |
feaa7bba | 803 | out_alloc: |
b3b94faa DT |
804 | if (alloc_required) |
805 | gfs2_alloc_put(ndip); | |
feaa7bba | 806 | out_gunlock: |
b3b94faa | 807 | gfs2_glock_dq_m(num_gh, ghs); |
feaa7bba | 808 | out_uninit: |
b3b94faa DT |
809 | for (x = 0; x < num_gh; x++) |
810 | gfs2_holder_uninit(ghs + x); | |
feaa7bba | 811 | out_gunlock_r: |
b3b94faa DT |
812 | if (dir_rename) |
813 | gfs2_glock_dq_uninit(&r_gh); | |
feaa7bba | 814 | out: |
b3b94faa DT |
815 | return error; |
816 | } | |
817 | ||
818 | /** | |
819 | * gfs2_readlink - Read the value of a symlink | |
820 | * @dentry: the symlink | |
821 | * @buf: the buffer to read the symlink data into | |
822 | * @size: the size of the buffer | |
823 | * | |
824 | * Returns: errno | |
825 | */ | |
826 | ||
827 | static int gfs2_readlink(struct dentry *dentry, char __user *user_buf, | |
828 | int user_size) | |
829 | { | |
feaa7bba | 830 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
831 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
832 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
833 | int error; | |
834 | ||
b3b94faa DT |
835 | error = gfs2_readlinki(ip, &buf, &len); |
836 | if (error) | |
837 | return error; | |
838 | ||
839 | if (user_size > len - 1) | |
840 | user_size = len - 1; | |
841 | ||
842 | if (copy_to_user(user_buf, buf, user_size)) | |
843 | error = -EFAULT; | |
844 | else | |
845 | error = user_size; | |
846 | ||
847 | if (buf != array) | |
848 | kfree(buf); | |
849 | ||
850 | return error; | |
851 | } | |
852 | ||
853 | /** | |
854 | * gfs2_follow_link - Follow a symbolic link | |
855 | * @dentry: The dentry of the link | |
856 | * @nd: Data that we pass to vfs_follow_link() | |
857 | * | |
858 | * This can handle symlinks of any size. It is optimised for symlinks | |
859 | * under GFS2_FAST_NAME_SIZE. | |
860 | * | |
861 | * Returns: 0 on success or error code | |
862 | */ | |
863 | ||
864 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) | |
865 | { | |
feaa7bba | 866 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa DT |
867 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
868 | unsigned int len = GFS2_FAST_NAME_SIZE; | |
869 | int error; | |
870 | ||
b3b94faa DT |
871 | error = gfs2_readlinki(ip, &buf, &len); |
872 | if (!error) { | |
873 | error = vfs_follow_link(nd, buf); | |
874 | if (buf != array) | |
875 | kfree(buf); | |
876 | } | |
877 | ||
878 | return ERR_PTR(error); | |
879 | } | |
880 | ||
881 | /** | |
882 | * gfs2_permission - | |
883 | * @inode: | |
884 | * @mask: | |
885 | * @nd: passed from Linux VFS, ignored by us | |
886 | * | |
300c7d75 SW |
887 | * This may be called from the VFS directly, or from within GFS2 with the |
888 | * inode locked, so we look to see if the glock is already locked and only | |
889 | * lock the glock if its not already been done. | |
890 | * | |
b3b94faa DT |
891 | * Returns: errno |
892 | */ | |
893 | ||
894 | static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd) | |
895 | { | |
feaa7bba | 896 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
897 | struct gfs2_holder i_gh; |
898 | int error; | |
300c7d75 | 899 | int unlock = 0; |
b3b94faa | 900 | |
300c7d75 SW |
901 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) { |
902 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
903 | if (error) | |
904 | return error; | |
905 | unlock = 1; | |
906 | } | |
b3b94faa | 907 | |
77386e1f | 908 | error = generic_permission(inode, mask, gfs2_check_acl); |
300c7d75 | 909 | if (unlock) |
b3b94faa | 910 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
911 | |
912 | return error; | |
913 | } | |
914 | ||
915 | static int setattr_size(struct inode *inode, struct iattr *attr) | |
916 | { | |
feaa7bba | 917 | struct gfs2_inode *ip = GFS2_I(inode); |
16615be1 | 918 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
b3b94faa DT |
919 | int error; |
920 | ||
921 | if (attr->ia_size != ip->i_di.di_size) { | |
16615be1 | 922 | error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); |
b3b94faa DT |
923 | if (error) |
924 | return error; | |
16615be1 SW |
925 | error = vmtruncate(inode, attr->ia_size); |
926 | gfs2_trans_end(sdp); | |
927 | if (error) | |
928 | return error; | |
b3b94faa DT |
929 | } |
930 | ||
aa6a85a9 | 931 | error = gfs2_truncatei(ip, attr->ia_size); |
090ffaa5 WC |
932 | if (error && (inode->i_size != ip->i_di.di_size)) |
933 | i_size_write(inode, ip->i_di.di_size); | |
b3b94faa DT |
934 | |
935 | return error; | |
936 | } | |
937 | ||
938 | static int setattr_chown(struct inode *inode, struct iattr *attr) | |
939 | { | |
feaa7bba SW |
940 | struct gfs2_inode *ip = GFS2_I(inode); |
941 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
b3b94faa | 942 | struct buffer_head *dibh; |
cd915493 | 943 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
944 | int error; |
945 | ||
2933f925 SW |
946 | ouid = inode->i_uid; |
947 | ogid = inode->i_gid; | |
b3b94faa DT |
948 | nuid = attr->ia_uid; |
949 | ngid = attr->ia_gid; | |
950 | ||
951 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
952 | ouid = nuid = NO_QUOTA_CHANGE; | |
953 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
954 | ogid = ngid = NO_QUOTA_CHANGE; | |
955 | ||
956 | gfs2_alloc_get(ip); | |
957 | ||
958 | error = gfs2_quota_lock(ip, nuid, ngid); | |
959 | if (error) | |
960 | goto out_alloc; | |
961 | ||
962 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
963 | error = gfs2_quota_check(ip, nuid, ngid); | |
964 | if (error) | |
965 | goto out_gunlock_q; | |
966 | } | |
967 | ||
968 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
969 | if (error) | |
970 | goto out_gunlock_q; | |
971 | ||
972 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
973 | if (error) | |
974 | goto out_end_trans; | |
975 | ||
976 | error = inode_setattr(inode, attr); | |
977 | gfs2_assert_warn(sdp, !error); | |
b3b94faa | 978 | |
d4e9c4c3 | 979 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 980 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
981 | brelse(dibh); |
982 | ||
983 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
af18ddb8 SW |
984 | gfs2_quota_change(ip, -ip->i_di.di_blocks, ouid, ogid); |
985 | gfs2_quota_change(ip, ip->i_di.di_blocks, nuid, ngid); | |
b3b94faa DT |
986 | } |
987 | ||
a91ea69f | 988 | out_end_trans: |
b3b94faa | 989 | gfs2_trans_end(sdp); |
a91ea69f | 990 | out_gunlock_q: |
b3b94faa | 991 | gfs2_quota_unlock(ip); |
a91ea69f | 992 | out_alloc: |
b3b94faa | 993 | gfs2_alloc_put(ip); |
b3b94faa DT |
994 | return error; |
995 | } | |
996 | ||
997 | /** | |
998 | * gfs2_setattr - Change attributes on an inode | |
999 | * @dentry: The dentry which is changing | |
1000 | * @attr: The structure describing the change | |
1001 | * | |
1002 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1003 | * that change out to disk. | |
1004 | * | |
1005 | * Returns: errno | |
1006 | */ | |
1007 | ||
1008 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1009 | { | |
1010 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1011 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1012 | struct gfs2_holder i_gh; |
1013 | int error; | |
1014 | ||
b3b94faa DT |
1015 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1016 | if (error) | |
1017 | return error; | |
1018 | ||
1019 | error = -EPERM; | |
1020 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1021 | goto out; | |
1022 | ||
1023 | error = inode_change_ok(inode, attr); | |
1024 | if (error) | |
1025 | goto out; | |
1026 | ||
1027 | if (attr->ia_valid & ATTR_SIZE) | |
1028 | error = setattr_size(inode, attr); | |
1029 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) | |
1030 | error = setattr_chown(inode, attr); | |
1031 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1032 | error = gfs2_acl_chmod(ip, attr); | |
1033 | else | |
1034 | error = gfs2_setattr_simple(ip, attr); | |
1035 | ||
a91ea69f | 1036 | out: |
b3b94faa | 1037 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1038 | if (!error) |
1039 | mark_inode_dirty(inode); | |
b3b94faa DT |
1040 | return error; |
1041 | } | |
1042 | ||
1043 | /** | |
1044 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1045 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1046 | * @dentry: The dentry to stat |
1047 | * @stat: The inode's stats | |
1048 | * | |
dcf3dd85 SW |
1049 | * This may be called from the VFS directly, or from within GFS2 with the |
1050 | * inode locked, so we look to see if the glock is already locked and only | |
1051 | * lock the glock if its not already been done. Note that its the NFS | |
1052 | * readdirplus operation which causes this to be called (from filldir) | |
1053 | * with the glock already held. | |
1054 | * | |
b3b94faa DT |
1055 | * Returns: errno |
1056 | */ | |
1057 | ||
1058 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1059 | struct kstat *stat) | |
1060 | { | |
1061 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1062 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1063 | struct gfs2_holder gh; |
1064 | int error; | |
dcf3dd85 | 1065 | int unlock = 0; |
b3b94faa | 1066 | |
dcf3dd85 SW |
1067 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) { |
1068 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
1069 | if (error) | |
1070 | return error; | |
1071 | unlock = 1; | |
b3b94faa DT |
1072 | } |
1073 | ||
dcf3dd85 | 1074 | generic_fillattr(inode, stat); |
d7c103d0 | 1075 | if (unlock) |
dcf3dd85 SW |
1076 | gfs2_glock_dq_uninit(&gh); |
1077 | ||
1078 | return 0; | |
b3b94faa DT |
1079 | } |
1080 | ||
1081 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1082 | const void *data, size_t size, int flags) | |
1083 | { | |
feaa7bba | 1084 | struct inode *inode = dentry->d_inode; |
b3b94faa DT |
1085 | struct gfs2_ea_request er; |
1086 | ||
b3b94faa DT |
1087 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1088 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1089 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1090 | return -EOPNOTSUPP; | |
1091 | er.er_data = (char *)data; | |
1092 | er.er_name_len = strlen(er.er_name); | |
1093 | er.er_data_len = size; | |
1094 | er.er_flags = flags; | |
1095 | ||
feaa7bba | 1096 | gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE)); |
b3b94faa | 1097 | |
feaa7bba | 1098 | return gfs2_ea_set(GFS2_I(inode), &er); |
b3b94faa DT |
1099 | } |
1100 | ||
1101 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1102 | void *data, size_t size) | |
1103 | { | |
1104 | struct gfs2_ea_request er; | |
1105 | ||
b3b94faa DT |
1106 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1107 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1108 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1109 | return -EOPNOTSUPP; | |
1110 | er.er_data = data; | |
1111 | er.er_name_len = strlen(er.er_name); | |
1112 | er.er_data_len = size; | |
1113 | ||
feaa7bba | 1114 | return gfs2_ea_get(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1115 | } |
1116 | ||
1117 | static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) | |
1118 | { | |
1119 | struct gfs2_ea_request er; | |
1120 | ||
b3b94faa DT |
1121 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1122 | er.er_data = (size) ? buffer : NULL; | |
1123 | er.er_data_len = size; | |
1124 | ||
feaa7bba | 1125 | return gfs2_ea_list(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1126 | } |
1127 | ||
1128 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1129 | { | |
1130 | struct gfs2_ea_request er; | |
1131 | ||
b3b94faa DT |
1132 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
1133 | er.er_type = gfs2_ea_name2type(name, &er.er_name); | |
1134 | if (er.er_type == GFS2_EATYPE_UNUSED) | |
1135 | return -EOPNOTSUPP; | |
1136 | er.er_name_len = strlen(er.er_name); | |
1137 | ||
feaa7bba | 1138 | return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er); |
b3b94faa DT |
1139 | } |
1140 | ||
92e1d5be | 1141 | const struct inode_operations gfs2_file_iops = { |
b3b94faa DT |
1142 | .permission = gfs2_permission, |
1143 | .setattr = gfs2_setattr, | |
1144 | .getattr = gfs2_getattr, | |
1145 | .setxattr = gfs2_setxattr, | |
1146 | .getxattr = gfs2_getxattr, | |
1147 | .listxattr = gfs2_listxattr, | |
1148 | .removexattr = gfs2_removexattr, | |
1149 | }; | |
1150 | ||
92e1d5be | 1151 | const struct inode_operations gfs2_dev_iops = { |
b3b94faa DT |
1152 | .permission = gfs2_permission, |
1153 | .setattr = gfs2_setattr, | |
1154 | .getattr = gfs2_getattr, | |
1155 | .setxattr = gfs2_setxattr, | |
1156 | .getxattr = gfs2_getxattr, | |
1157 | .listxattr = gfs2_listxattr, | |
1158 | .removexattr = gfs2_removexattr, | |
1159 | }; | |
1160 | ||
92e1d5be | 1161 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1162 | .create = gfs2_create, |
1163 | .lookup = gfs2_lookup, | |
1164 | .link = gfs2_link, | |
1165 | .unlink = gfs2_unlink, | |
1166 | .symlink = gfs2_symlink, | |
1167 | .mkdir = gfs2_mkdir, | |
1168 | .rmdir = gfs2_rmdir, | |
1169 | .mknod = gfs2_mknod, | |
1170 | .rename = gfs2_rename, | |
1171 | .permission = gfs2_permission, | |
1172 | .setattr = gfs2_setattr, | |
1173 | .getattr = gfs2_getattr, | |
1174 | .setxattr = gfs2_setxattr, | |
1175 | .getxattr = gfs2_getxattr, | |
1176 | .listxattr = gfs2_listxattr, | |
1177 | .removexattr = gfs2_removexattr, | |
1178 | }; | |
1179 | ||
92e1d5be | 1180 | const struct inode_operations gfs2_symlink_iops = { |
b3b94faa DT |
1181 | .readlink = gfs2_readlink, |
1182 | .follow_link = gfs2_follow_link, | |
1183 | .permission = gfs2_permission, | |
1184 | .setattr = gfs2_setattr, | |
1185 | .getattr = gfs2_getattr, | |
1186 | .setxattr = gfs2_setxattr, | |
1187 | .getxattr = gfs2_getxattr, | |
1188 | .listxattr = gfs2_listxattr, | |
1189 | .removexattr = gfs2_removexattr, | |
1190 | }; | |
1191 |