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