]>
Commit | Line | Data |
---|---|---|
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 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/posix_acl.h> | |
16 | #include <linux/sort.h> | |
5c676f6d | 17 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 18 | #include <linux/crc32.h> |
7d308590 | 19 | #include <linux/lm_interface.h> |
fcb47e0b | 20 | #include <linux/security.h> |
b3b94faa DT |
21 | |
22 | #include "gfs2.h" | |
5c676f6d | 23 | #include "incore.h" |
b3b94faa DT |
24 | #include "acl.h" |
25 | #include "bmap.h" | |
26 | #include "dir.h" | |
27 | #include "eattr.h" | |
28 | #include "glock.h" | |
29 | #include "glops.h" | |
30 | #include "inode.h" | |
31 | #include "log.h" | |
32 | #include "meta_io.h" | |
33 | #include "ops_address.h" | |
34 | #include "ops_file.h" | |
35 | #include "ops_inode.h" | |
36 | #include "quota.h" | |
37 | #include "rgrp.h" | |
38 | #include "trans.h" | |
5c676f6d | 39 | #include "util.h" |
b3b94faa | 40 | |
bb8d8a6f SW |
41 | struct gfs2_inum_range_host { |
42 | u64 ir_start; | |
43 | u64 ir_length; | |
44 | }; | |
45 | ||
feaa7bba SW |
46 | static int iget_test(struct inode *inode, void *opaque) |
47 | { | |
48 | struct gfs2_inode *ip = GFS2_I(inode); | |
dbb7cae2 | 49 | u64 *no_addr = opaque; |
feaa7bba | 50 | |
dbb7cae2 | 51 | if (ip->i_no_addr == *no_addr && |
1be38679 | 52 | inode->i_private != NULL) |
feaa7bba | 53 | return 1; |
b3b94faa | 54 | |
feaa7bba SW |
55 | return 0; |
56 | } | |
57 | ||
58 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 59 | { |
feaa7bba | 60 | struct gfs2_inode *ip = GFS2_I(inode); |
dbb7cae2 | 61 | u64 *no_addr = opaque; |
b3b94faa | 62 | |
dbb7cae2 SW |
63 | inode->i_ino = (unsigned long)*no_addr; |
64 | ip->i_no_addr = *no_addr; | |
feaa7bba SW |
65 | return 0; |
66 | } | |
b3b94faa | 67 | |
dbb7cae2 | 68 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
feaa7bba | 69 | { |
dbb7cae2 SW |
70 | unsigned long hash = (unsigned long)no_addr; |
71 | return ilookup5(sb, hash, iget_test, &no_addr); | |
feaa7bba | 72 | } |
b3b94faa | 73 | |
dbb7cae2 | 74 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
feaa7bba | 75 | { |
dbb7cae2 SW |
76 | unsigned long hash = (unsigned long)no_addr; |
77 | return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); | |
b3b94faa DT |
78 | } |
79 | ||
7a9f53b3 BM |
80 | struct gfs2_skip_data { |
81 | u64 no_addr; | |
82 | int skipped; | |
83 | }; | |
84 | ||
85 | static int iget_skip_test(struct inode *inode, void *opaque) | |
86 | { | |
87 | struct gfs2_inode *ip = GFS2_I(inode); | |
88 | struct gfs2_skip_data *data = opaque; | |
89 | ||
90 | if (ip->i_no_addr == data->no_addr && inode->i_private != NULL){ | |
91 | if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){ | |
92 | data->skipped = 1; | |
93 | return 0; | |
94 | } | |
95 | return 1; | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int iget_skip_set(struct inode *inode, void *opaque) | |
101 | { | |
102 | struct gfs2_inode *ip = GFS2_I(inode); | |
103 | struct gfs2_skip_data *data = opaque; | |
104 | ||
105 | if (data->skipped) | |
106 | return 1; | |
107 | inode->i_ino = (unsigned long)(data->no_addr); | |
108 | ip->i_no_addr = data->no_addr; | |
109 | return 0; | |
110 | } | |
111 | ||
112 | static struct inode *gfs2_iget_skip(struct super_block *sb, | |
113 | u64 no_addr) | |
114 | { | |
115 | struct gfs2_skip_data data; | |
116 | unsigned long hash = (unsigned long)no_addr; | |
117 | ||
118 | data.no_addr = no_addr; | |
119 | data.skipped = 0; | |
120 | return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data); | |
121 | } | |
122 | ||
35dcc52e WC |
123 | /** |
124 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
125 | * from directory entry inside gfs2_inode_lookup(). This has caused issues | |
126 | * with NFS code path since its get_dentry routine doesn't have the relevant | |
127 | * directory entry when gfs2_inode_lookup() is invoked. Part of the code | |
128 | * segment inside gfs2_inode_lookup code needs to get moved around. | |
129 | * | |
130 | * Clean up I_LOCK and I_NEW as well. | |
131 | **/ | |
132 | ||
133 | void gfs2_set_iop(struct inode *inode) | |
134 | { | |
135 | umode_t mode = inode->i_mode; | |
136 | ||
137 | if (S_ISREG(mode)) { | |
138 | inode->i_op = &gfs2_file_iops; | |
139 | inode->i_fop = &gfs2_file_fops; | |
140 | inode->i_mapping->a_ops = &gfs2_file_aops; | |
141 | } else if (S_ISDIR(mode)) { | |
142 | inode->i_op = &gfs2_dir_iops; | |
143 | inode->i_fop = &gfs2_dir_fops; | |
144 | } else if (S_ISLNK(mode)) { | |
145 | inode->i_op = &gfs2_symlink_iops; | |
146 | } else { | |
147 | inode->i_op = &gfs2_dev_iops; | |
148 | } | |
149 | ||
150 | unlock_new_inode(inode); | |
151 | } | |
152 | ||
b3b94faa | 153 | /** |
feaa7bba SW |
154 | * gfs2_inode_lookup - Lookup an inode |
155 | * @sb: The super block | |
dbb7cae2 | 156 | * @no_addr: The inode number |
feaa7bba | 157 | * @type: The type of the inode |
7a9f53b3 | 158 | * @skip_freeing: set this not return an inode if it is currently being freed. |
b3b94faa | 159 | * |
feaa7bba | 160 | * Returns: A VFS inode, or an error |
b3b94faa DT |
161 | */ |
162 | ||
bb9bcf06 WC |
163 | struct inode *gfs2_inode_lookup(struct super_block *sb, |
164 | unsigned int type, | |
165 | u64 no_addr, | |
7a9f53b3 | 166 | u64 no_formal_ino, int skip_freeing) |
b3b94faa | 167 | { |
7a9f53b3 BM |
168 | struct inode *inode; |
169 | struct gfs2_inode *ip; | |
feaa7bba SW |
170 | struct gfs2_glock *io_gl; |
171 | int error; | |
b3b94faa | 172 | |
7a9f53b3 BM |
173 | if (skip_freeing) |
174 | inode = gfs2_iget_skip(sb, no_addr); | |
175 | else | |
176 | inode = gfs2_iget(sb, no_addr); | |
177 | ip = GFS2_I(inode); | |
178 | ||
26d83ded SW |
179 | if (!inode) |
180 | return ERR_PTR(-ENOBUFS); | |
181 | ||
feaa7bba SW |
182 | if (inode->i_state & I_NEW) { |
183 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
bba9dfd8 | 184 | inode->i_private = ip; |
bb9bcf06 | 185 | ip->i_no_formal_ino = no_formal_ino; |
b3b94faa | 186 | |
dbb7cae2 | 187 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
feaa7bba SW |
188 | if (unlikely(error)) |
189 | goto fail; | |
190 | ip->i_gl->gl_object = ip; | |
b3b94faa | 191 | |
dbb7cae2 | 192 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
feaa7bba SW |
193 | if (unlikely(error)) |
194 | goto fail_put; | |
b3b94faa | 195 | |
bfded27b | 196 | set_bit(GIF_INVALID, &ip->i_flags); |
feaa7bba SW |
197 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
198 | if (unlikely(error)) | |
199 | goto fail_iopen; | |
d93cfa98 | 200 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
b3b94faa | 201 | |
feaa7bba | 202 | gfs2_glock_put(io_gl); |
c8cdf479 | 203 | |
35dcc52e WC |
204 | if ((type == DT_UNKNOWN) && (no_formal_ino == 0)) |
205 | goto gfs2_nfsbypass; | |
206 | ||
207 | inode->i_mode = DT2IF(type); | |
208 | ||
c8cdf479 SW |
209 | /* |
210 | * We must read the inode in order to work out its type in | |
211 | * this case. Note that this doesn't happen often as we normally | |
212 | * know the type beforehand. This code path only occurs during | |
213 | * unlinked inode recovery (where it is safe to do this glock, | |
214 | * which is not true in the general case). | |
215 | */ | |
c8cdf479 SW |
216 | if (type == DT_UNKNOWN) { |
217 | struct gfs2_holder gh; | |
218 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
219 | if (unlikely(error)) | |
220 | goto fail_glock; | |
221 | /* Inode is now uptodate */ | |
c8cdf479 SW |
222 | gfs2_glock_dq_uninit(&gh); |
223 | } | |
224 | ||
35dcc52e | 225 | gfs2_set_iop(inode); |
feaa7bba | 226 | } |
b3b94faa | 227 | |
35dcc52e | 228 | gfs2_nfsbypass: |
b3b94faa | 229 | return inode; |
c8cdf479 SW |
230 | fail_glock: |
231 | gfs2_glock_dq(&ip->i_iopen_gh); | |
feaa7bba SW |
232 | fail_iopen: |
233 | gfs2_glock_put(io_gl); | |
234 | fail_put: | |
235 | ip->i_gl->gl_object = NULL; | |
236 | gfs2_glock_put(ip->i_gl); | |
237 | fail: | |
238 | iput(inode); | |
239 | return ERR_PTR(error); | |
b3b94faa DT |
240 | } |
241 | ||
af339c02 | 242 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
ea744d01 SW |
243 | { |
244 | struct gfs2_dinode_host *di = &ip->i_di; | |
245 | const struct gfs2_dinode *str = buf; | |
246 | ||
dbb7cae2 | 247 | if (ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)) { |
af339c02 SW |
248 | if (gfs2_consist_inode(ip)) |
249 | gfs2_dinode_print(ip); | |
250 | return -EIO; | |
251 | } | |
dbb7cae2 | 252 | ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); |
b60623c2 | 253 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
e7f14f4d | 254 | ip->i_inode.i_rdev = 0; |
b60623c2 | 255 | switch (ip->i_inode.i_mode & S_IFMT) { |
e7f14f4d SW |
256 | case S_IFBLK: |
257 | case S_IFCHR: | |
258 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), | |
259 | be32_to_cpu(str->di_minor)); | |
260 | break; | |
261 | }; | |
262 | ||
2933f925 SW |
263 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
264 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); | |
4f56110a SW |
265 | /* |
266 | * We will need to review setting the nlink count here in the | |
267 | * light of the forthcoming ro bind mount work. This is a reminder | |
268 | * to do that. | |
269 | */ | |
270 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); | |
ea744d01 | 271 | di->di_size = be64_to_cpu(str->di_size); |
9e2dbdac | 272 | i_size_write(&ip->i_inode, di->di_size); |
ea744d01 | 273 | di->di_blocks = be64_to_cpu(str->di_blocks); |
9e2dbdac | 274 | gfs2_set_inode_blocks(&ip->i_inode); |
1a7b1eed | 275 | ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime); |
4bd91ba1 | 276 | ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); |
1a7b1eed | 277 | ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); |
4bd91ba1 | 278 | ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); |
1a7b1eed | 279 | ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); |
4bd91ba1 | 280 | ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec); |
ea744d01 SW |
281 | |
282 | di->di_goal_meta = be64_to_cpu(str->di_goal_meta); | |
283 | di->di_goal_data = be64_to_cpu(str->di_goal_data); | |
284 | di->di_generation = be64_to_cpu(str->di_generation); | |
285 | ||
286 | di->di_flags = be32_to_cpu(str->di_flags); | |
6b124d8d | 287 | gfs2_set_inode_flags(&ip->i_inode); |
ea744d01 SW |
288 | di->di_height = be16_to_cpu(str->di_height); |
289 | ||
290 | di->di_depth = be16_to_cpu(str->di_depth); | |
291 | di->di_entries = be32_to_cpu(str->di_entries); | |
292 | ||
293 | di->di_eattr = be64_to_cpu(str->di_eattr); | |
af339c02 | 294 | return 0; |
ea744d01 SW |
295 | } |
296 | ||
e9bd2b3b WC |
297 | static void gfs2_inode_bh(struct gfs2_inode *ip, struct buffer_head *bh) |
298 | { | |
299 | ip->i_cache[0] = bh; | |
300 | } | |
301 | ||
b3b94faa DT |
302 | /** |
303 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
304 | * @ip: The GFS2 inode | |
305 | * | |
306 | * Returns: errno | |
307 | */ | |
308 | ||
309 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
310 | { | |
311 | struct buffer_head *dibh; | |
312 | int error; | |
313 | ||
314 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
315 | if (error) | |
316 | return error; | |
317 | ||
feaa7bba | 318 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
b3b94faa DT |
319 | brelse(dibh); |
320 | return -EIO; | |
321 | } | |
322 | ||
af339c02 | 323 | error = gfs2_dinode_in(ip, dibh->b_data); |
b3b94faa | 324 | brelse(dibh); |
bfded27b | 325 | clear_bit(GIF_INVALID, &ip->i_flags); |
b3b94faa | 326 | |
af339c02 | 327 | return error; |
b3b94faa DT |
328 | } |
329 | ||
feaa7bba | 330 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
b3b94faa | 331 | { |
feaa7bba | 332 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
333 | struct gfs2_alloc *al; |
334 | struct gfs2_rgrpd *rgd; | |
335 | int error; | |
336 | ||
337 | if (ip->i_di.di_blocks != 1) { | |
338 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 339 | gfs2_dinode_print(ip); |
b3b94faa DT |
340 | return -EIO; |
341 | } | |
342 | ||
343 | al = gfs2_alloc_get(ip); | |
344 | ||
345 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
346 | if (error) | |
347 | goto out; | |
348 | ||
349 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
350 | if (error) | |
351 | goto out_qs; | |
352 | ||
dbb7cae2 | 353 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
b3b94faa DT |
354 | if (!rgd) { |
355 | gfs2_consist_inode(ip); | |
356 | error = -EIO; | |
357 | goto out_rindex_relse; | |
358 | } | |
359 | ||
360 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
361 | &al->al_rgd_gh); | |
362 | if (error) | |
363 | goto out_rindex_relse; | |
364 | ||
420b9e5e | 365 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
b3b94faa DT |
366 | if (error) |
367 | goto out_rg_gunlock; | |
368 | ||
369 | gfs2_trans_add_gl(ip->i_gl); | |
370 | ||
371 | gfs2_free_di(rgd, ip); | |
372 | ||
b3b94faa DT |
373 | gfs2_trans_end(sdp); |
374 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
375 | ||
feaa7bba | 376 | out_rg_gunlock: |
b3b94faa | 377 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
feaa7bba | 378 | out_rindex_relse: |
b3b94faa | 379 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
feaa7bba | 380 | out_qs: |
b3b94faa | 381 | gfs2_quota_unhold(ip); |
36327521 | 382 | out: |
feaa7bba | 383 | gfs2_alloc_put(ip); |
b3b94faa DT |
384 | return error; |
385 | } | |
386 | ||
b3b94faa | 387 | /** |
87d21e07 | 388 | * gfs2_change_nlink - Change nlink count on inode |
b3b94faa DT |
389 | * @ip: The GFS2 inode |
390 | * @diff: The change in the nlink count required | |
391 | * | |
392 | * Returns: errno | |
393 | */ | |
87d21e07 | 394 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) |
b3b94faa DT |
395 | { |
396 | struct buffer_head *dibh; | |
cd915493 | 397 | u32 nlink; |
b3b94faa DT |
398 | int error; |
399 | ||
4f56110a SW |
400 | BUG_ON(diff != 1 && diff != -1); |
401 | nlink = ip->i_inode.i_nlink + diff; | |
b3b94faa DT |
402 | |
403 | /* If we are reducing the nlink count, but the new value ends up being | |
404 | bigger than the old one, we must have underflowed. */ | |
4f56110a | 405 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
b3b94faa | 406 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 407 | gfs2_dinode_print(ip); |
b3b94faa DT |
408 | return -EIO; |
409 | } | |
410 | ||
411 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
412 | if (error) | |
413 | return error; | |
414 | ||
4f56110a SW |
415 | if (diff > 0) |
416 | inc_nlink(&ip->i_inode); | |
417 | else | |
418 | drop_nlink(&ip->i_inode); | |
419 | ||
4bd91ba1 | 420 | ip->i_inode.i_ctime = CURRENT_TIME; |
b3b94faa | 421 | |
d4e9c4c3 | 422 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 423 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 424 | brelse(dibh); |
feaa7bba | 425 | mark_inode_dirty(&ip->i_inode); |
b3b94faa | 426 | |
87d21e07 | 427 | if (ip->i_inode.i_nlink == 0) |
ddee7608 | 428 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
87d21e07 | 429 | |
5509826f WC |
430 | return error; |
431 | } | |
432 | ||
c752666c SW |
433 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
434 | { | |
435 | struct qstr qstr; | |
6c93fd1e | 436 | struct inode *inode; |
71b86f56 | 437 | gfs2_str2qstr(&qstr, name); |
6c93fd1e RC |
438 | inode = gfs2_lookupi(dip, &qstr, 1, NULL); |
439 | /* gfs2_lookupi has inconsistent callers: vfs | |
440 | * related routines expect NULL for no entry found, | |
441 | * gfs2_lookup_simple callers expect ENOENT | |
442 | * and do not check for NULL. | |
443 | */ | |
444 | if (inode == NULL) | |
445 | return ERR_PTR(-ENOENT); | |
446 | else | |
447 | return inode; | |
c752666c SW |
448 | } |
449 | ||
450 | ||
b3b94faa DT |
451 | /** |
452 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
453 | * @d_gh: An initialized holder for the directory glock | |
454 | * @name: The name of the inode to look for | |
455 | * @is_root: If 1, ignore the caller's permissions | |
456 | * @i_gh: An uninitialized holder for the new inode glock | |
457 | * | |
d7c103d0 SW |
458 | * This can be called via the VFS filldir function when NFS is doing |
459 | * a readdirplus and the inode which its intending to stat isn't | |
460 | * already in cache. In this case we must not take the directory glock | |
461 | * again, since the readdir call will have already taken that lock. | |
b3b94faa DT |
462 | * |
463 | * Returns: errno | |
464 | */ | |
465 | ||
feaa7bba SW |
466 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
467 | int is_root, struct nameidata *nd) | |
b3b94faa | 468 | { |
c9fd4307 | 469 | struct super_block *sb = dir->i_sb; |
feaa7bba | 470 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 471 | struct gfs2_holder d_gh; |
037bcbb7 | 472 | int error = 0; |
c752666c | 473 | struct inode *inode = NULL; |
d7c103d0 | 474 | int unlock = 0; |
b3b94faa DT |
475 | |
476 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 477 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 478 | |
c752666c SW |
479 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
480 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
481 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
482 | igrab(dir); |
483 | return dir; | |
b3b94faa DT |
484 | } |
485 | ||
d7c103d0 SW |
486 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == 0) { |
487 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
488 | if (error) | |
489 | return ERR_PTR(error); | |
490 | unlock = 1; | |
491 | } | |
b3b94faa DT |
492 | |
493 | if (!is_root) { | |
faf450ef | 494 | error = permission(dir, MAY_EXEC, NULL); |
b3b94faa DT |
495 | if (error) |
496 | goto out; | |
497 | } | |
498 | ||
dbb7cae2 SW |
499 | inode = gfs2_dir_search(dir, name); |
500 | if (IS_ERR(inode)) | |
501 | error = PTR_ERR(inode); | |
7359a19c | 502 | out: |
d7c103d0 SW |
503 | if (unlock) |
504 | gfs2_glock_dq_uninit(&d_gh); | |
c752666c SW |
505 | if (error == -ENOENT) |
506 | return NULL; | |
d7c103d0 | 507 | return inode ? inode : ERR_PTR(error); |
b3b94faa DT |
508 | } |
509 | ||
bb8d8a6f SW |
510 | static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf) |
511 | { | |
512 | const struct gfs2_inum_range *str = buf; | |
513 | ||
514 | ir->ir_start = be64_to_cpu(str->ir_start); | |
515 | ir->ir_length = be64_to_cpu(str->ir_length); | |
516 | } | |
517 | ||
518 | static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf) | |
519 | { | |
520 | struct gfs2_inum_range *str = buf; | |
521 | ||
522 | str->ir_start = cpu_to_be64(ir->ir_start); | |
523 | str->ir_length = cpu_to_be64(ir->ir_length); | |
524 | } | |
525 | ||
cd915493 | 526 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 527 | { |
feaa7bba | 528 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
b3b94faa | 529 | struct buffer_head *bh; |
e6972647 | 530 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
531 | int error; |
532 | ||
533 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
534 | if (error) | |
535 | return error; | |
f55ab26a | 536 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
537 | |
538 | error = gfs2_meta_inode_buffer(ip, &bh); | |
539 | if (error) { | |
f55ab26a | 540 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
541 | gfs2_trans_end(sdp); |
542 | return error; | |
543 | } | |
544 | ||
545 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
546 | ||
547 | if (ir.ir_length) { | |
548 | *formal_ino = ir.ir_start++; | |
549 | ir.ir_length--; | |
d4e9c4c3 | 550 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
551 | gfs2_inum_range_out(&ir, |
552 | bh->b_data + sizeof(struct gfs2_dinode)); | |
553 | brelse(bh); | |
f55ab26a | 554 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
555 | gfs2_trans_end(sdp); |
556 | return 0; | |
557 | } | |
558 | ||
559 | brelse(bh); | |
560 | ||
f55ab26a | 561 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
562 | gfs2_trans_end(sdp); |
563 | ||
564 | return 1; | |
565 | } | |
566 | ||
cd915493 | 567 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 568 | { |
feaa7bba SW |
569 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
570 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); | |
b3b94faa DT |
571 | struct gfs2_holder gh; |
572 | struct buffer_head *bh; | |
e6972647 | 573 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
574 | int error; |
575 | ||
576 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
577 | if (error) | |
578 | return error; | |
579 | ||
580 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
581 | if (error) | |
582 | goto out; | |
f55ab26a | 583 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
584 | |
585 | error = gfs2_meta_inode_buffer(ip, &bh); | |
586 | if (error) | |
587 | goto out_end_trans; | |
907b9bce | 588 | |
b3b94faa DT |
589 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
590 | ||
591 | if (!ir.ir_length) { | |
592 | struct buffer_head *m_bh; | |
cd915493 | 593 | u64 x, y; |
b44b84d7 | 594 | __be64 z; |
b3b94faa DT |
595 | |
596 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
597 | if (error) | |
598 | goto out_brelse; | |
599 | ||
b44b84d7 AV |
600 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
601 | x = y = be64_to_cpu(z); | |
b3b94faa DT |
602 | ir.ir_start = x; |
603 | ir.ir_length = GFS2_INUM_QUANTUM; | |
604 | x += GFS2_INUM_QUANTUM; | |
605 | if (x < y) | |
606 | gfs2_consist_inode(m_ip); | |
b44b84d7 | 607 | z = cpu_to_be64(x); |
d4e9c4c3 | 608 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b44b84d7 | 609 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
b3b94faa DT |
610 | |
611 | brelse(m_bh); | |
612 | } | |
613 | ||
614 | *formal_ino = ir.ir_start++; | |
615 | ir.ir_length--; | |
616 | ||
d4e9c4c3 | 617 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
618 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
619 | ||
420b9e5e | 620 | out_brelse: |
b3b94faa | 621 | brelse(bh); |
420b9e5e | 622 | out_end_trans: |
f55ab26a | 623 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa | 624 | gfs2_trans_end(sdp); |
420b9e5e | 625 | out: |
b3b94faa | 626 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
627 | return error; |
628 | } | |
629 | ||
cd915493 | 630 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
b3b94faa DT |
631 | { |
632 | int error; | |
633 | ||
634 | error = pick_formal_ino_1(sdp, inum); | |
635 | if (error <= 0) | |
636 | return error; | |
637 | ||
638 | error = pick_formal_ino_2(sdp, inum); | |
639 | ||
640 | return error; | |
641 | } | |
642 | ||
643 | /** | |
644 | * create_ok - OK to create a new on-disk inode here? | |
645 | * @dip: Directory in which dinode is to be created | |
646 | * @name: Name of new dinode | |
647 | * @mode: | |
648 | * | |
649 | * Returns: errno | |
650 | */ | |
651 | ||
feaa7bba | 652 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
653 | unsigned int mode) |
654 | { | |
655 | int error; | |
656 | ||
faf450ef | 657 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
658 | if (error) |
659 | return error; | |
660 | ||
661 | /* Don't create entries in an unlinked directory */ | |
4f56110a | 662 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
663 | return -EPERM; |
664 | ||
dbb7cae2 | 665 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
b3b94faa DT |
666 | switch (error) { |
667 | case -ENOENT: | |
668 | error = 0; | |
669 | break; | |
670 | case 0: | |
671 | return -EEXIST; | |
672 | default: | |
673 | return error; | |
674 | } | |
675 | ||
cd915493 | 676 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa | 677 | return -EFBIG; |
4f56110a | 678 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
679 | return -EMLINK; |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
684 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
685 | unsigned int *uid, unsigned int *gid) | |
686 | { | |
feaa7bba | 687 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
2933f925 | 688 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
b3b94faa DT |
689 | if (S_ISDIR(*mode)) |
690 | *mode |= S_ISUID; | |
2933f925 | 691 | else if (dip->i_inode.i_uid != current->fsuid) |
b3b94faa | 692 | *mode &= ~07111; |
2933f925 | 693 | *uid = dip->i_inode.i_uid; |
b3b94faa DT |
694 | } else |
695 | *uid = current->fsuid; | |
696 | ||
b60623c2 | 697 | if (dip->i_inode.i_mode & S_ISGID) { |
b3b94faa DT |
698 | if (S_ISDIR(*mode)) |
699 | *mode |= S_ISGID; | |
2933f925 | 700 | *gid = dip->i_inode.i_gid; |
b3b94faa DT |
701 | } else |
702 | *gid = current->fsgid; | |
703 | } | |
704 | ||
dbb7cae2 | 705 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) |
b3b94faa | 706 | { |
feaa7bba | 707 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
708 | int error; |
709 | ||
710 | gfs2_alloc_get(dip); | |
711 | ||
712 | dip->i_alloc.al_requested = RES_DINODE; | |
713 | error = gfs2_inplace_reserve(dip); | |
714 | if (error) | |
715 | goto out; | |
716 | ||
feaa7bba | 717 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
718 | if (error) |
719 | goto out_ipreserv; | |
720 | ||
dbb7cae2 | 721 | *no_addr = gfs2_alloc_di(dip, generation); |
b3b94faa DT |
722 | |
723 | gfs2_trans_end(sdp); | |
724 | ||
4340fe62 | 725 | out_ipreserv: |
b3b94faa | 726 | gfs2_inplace_release(dip); |
4340fe62 | 727 | out: |
b3b94faa | 728 | gfs2_alloc_put(dip); |
b3b94faa DT |
729 | return error; |
730 | } | |
731 | ||
732 | /** | |
733 | * init_dinode - Fill in a new dinode structure | |
734 | * @dip: the directory this inode is being created in | |
735 | * @gl: The glock covering the new inode | |
736 | * @inum: the inode number | |
737 | * @mode: the file permissions | |
738 | * @uid: | |
739 | * @gid: | |
740 | * | |
741 | */ | |
742 | ||
743 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 744 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 | 745 | unsigned int uid, unsigned int gid, |
e9bd2b3b | 746 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 747 | { |
feaa7bba | 748 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 749 | struct gfs2_dinode *di; |
b3b94faa | 750 | struct buffer_head *dibh; |
4bd91ba1 | 751 | struct timespec tv = CURRENT_TIME; |
b3b94faa DT |
752 | |
753 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 754 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
755 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
756 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
757 | di = (struct gfs2_dinode *)dibh->b_data; |
758 | ||
2442a098 SW |
759 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
760 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
761 | di->di_mode = cpu_to_be32(mode); |
762 | di->di_uid = cpu_to_be32(uid); | |
763 | di->di_gid = cpu_to_be32(gid); | |
294caaa3 SW |
764 | di->di_nlink = 0; |
765 | di->di_size = 0; | |
b96ca4fa | 766 | di->di_blocks = cpu_to_be64(1); |
4bd91ba1 | 767 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); |
e7f14f4d SW |
768 | di->di_major = cpu_to_be32(MAJOR(dev)); |
769 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
b96ca4fa | 770 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
4340fe62 | 771 | di->di_generation = cpu_to_be64(*generation); |
294caaa3 | 772 | di->di_flags = 0; |
b3b94faa DT |
773 | |
774 | if (S_ISREG(mode)) { | |
775 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || | |
776 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
b96ca4fa | 777 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa DT |
778 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) || |
779 | gfs2_tune_get(sdp, gt_new_files_directio)) | |
b96ca4fa | 780 | di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO); |
b3b94faa | 781 | } else if (S_ISDIR(mode)) { |
568f4c96 SW |
782 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
783 | GFS2_DIF_INHERIT_DIRECTIO); | |
784 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & | |
785 | GFS2_DIF_INHERIT_JDATA); | |
b3b94faa DT |
786 | } |
787 | ||
b96ca4fa | 788 | di->__pad1 = 0; |
a9583c79 | 789 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); |
294caaa3 | 790 | di->di_height = 0; |
b96ca4fa SW |
791 | di->__pad2 = 0; |
792 | di->__pad3 = 0; | |
294caaa3 SW |
793 | di->di_depth = 0; |
794 | di->di_entries = 0; | |
b96ca4fa | 795 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
294caaa3 | 796 | di->di_eattr = 0; |
4bd91ba1 SW |
797 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
798 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
799 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
b96ca4fa | 800 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
e9bd2b3b WC |
801 | |
802 | set_buffer_uptodate(dibh); | |
b96ca4fa | 803 | |
e9bd2b3b | 804 | *bhp = dibh; |
b3b94faa DT |
805 | } |
806 | ||
807 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 808 | unsigned int mode, const struct gfs2_inum_host *inum, |
e9bd2b3b | 809 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 810 | { |
feaa7bba | 811 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
812 | unsigned int uid, gid; |
813 | int error; | |
814 | ||
815 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
b3b94faa DT |
816 | gfs2_alloc_get(dip); |
817 | ||
818 | error = gfs2_quota_lock(dip, uid, gid); | |
819 | if (error) | |
820 | goto out; | |
821 | ||
822 | error = gfs2_quota_check(dip, uid, gid); | |
823 | if (error) | |
824 | goto out_quota; | |
825 | ||
feaa7bba | 826 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
827 | if (error) |
828 | goto out_quota; | |
829 | ||
e9bd2b3b | 830 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp); |
b3b94faa | 831 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
832 | gfs2_trans_end(sdp); |
833 | ||
feaa7bba | 834 | out_quota: |
b3b94faa | 835 | gfs2_quota_unlock(dip); |
feaa7bba | 836 | out: |
b3b94faa | 837 | gfs2_alloc_put(dip); |
b3b94faa DT |
838 | return error; |
839 | } | |
840 | ||
feaa7bba SW |
841 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
842 | struct gfs2_inode *ip) | |
b3b94faa | 843 | { |
feaa7bba | 844 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
845 | struct gfs2_alloc *al; |
846 | int alloc_required; | |
847 | struct buffer_head *dibh; | |
848 | int error; | |
849 | ||
850 | al = gfs2_alloc_get(dip); | |
851 | ||
852 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
853 | if (error) | |
854 | goto fail; | |
855 | ||
feaa7bba | 856 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c SW |
857 | if (alloc_required < 0) |
858 | goto fail; | |
b3b94faa | 859 | if (alloc_required) { |
2933f925 | 860 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
861 | if (error) |
862 | goto fail_quota_locks; | |
863 | ||
864 | al->al_requested = sdp->sd_max_dirres; | |
865 | ||
866 | error = gfs2_inplace_reserve(dip); | |
867 | if (error) | |
868 | goto fail_quota_locks; | |
869 | ||
320dd101 | 870 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 871 | al->al_rgd->rd_length + |
907b9bce | 872 | 2 * RES_DINODE + |
b3b94faa DT |
873 | RES_STATFS + RES_QUOTA, 0); |
874 | if (error) | |
875 | goto fail_ipreserv; | |
876 | } else { | |
feaa7bba | 877 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
878 | if (error) |
879 | goto fail_quota_locks; | |
880 | } | |
881 | ||
dbb7cae2 | 882 | error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
883 | if (error) |
884 | goto fail_end_trans; | |
885 | ||
886 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
887 | if (error) | |
888 | goto fail_end_trans; | |
4f56110a | 889 | ip->i_inode.i_nlink = 1; |
d4e9c4c3 | 890 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 891 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 892 | brelse(dibh); |
b3b94faa DT |
893 | return 0; |
894 | ||
320dd101 | 895 | fail_end_trans: |
b3b94faa DT |
896 | gfs2_trans_end(sdp); |
897 | ||
320dd101 | 898 | fail_ipreserv: |
b3b94faa DT |
899 | if (dip->i_alloc.al_rgd) |
900 | gfs2_inplace_release(dip); | |
901 | ||
320dd101 | 902 | fail_quota_locks: |
b3b94faa DT |
903 | gfs2_quota_unlock(dip); |
904 | ||
320dd101 | 905 | fail: |
b3b94faa | 906 | gfs2_alloc_put(dip); |
b3b94faa DT |
907 | return error; |
908 | } | |
909 | ||
fcb47e0b RH |
910 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
911 | { | |
912 | int err; | |
913 | size_t len; | |
914 | void *value; | |
915 | char *name; | |
916 | struct gfs2_ea_request er; | |
917 | ||
918 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, | |
919 | &name, &value, &len); | |
920 | ||
921 | if (err) { | |
922 | if (err == -EOPNOTSUPP) | |
923 | return 0; | |
924 | return err; | |
925 | } | |
926 | ||
927 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
928 | ||
929 | er.er_type = GFS2_EATYPE_SECURITY; | |
930 | er.er_name = name; | |
931 | er.er_data = value; | |
932 | er.er_name_len = strlen(name); | |
933 | er.er_data_len = len; | |
934 | ||
935 | err = gfs2_ea_set_i(ip, &er); | |
936 | ||
937 | kfree(value); | |
938 | kfree(name); | |
939 | ||
940 | return err; | |
941 | } | |
942 | ||
b3b94faa DT |
943 | /** |
944 | * gfs2_createi - Create a new inode | |
945 | * @ghs: An array of two holders | |
946 | * @name: The name of the new file | |
947 | * @mode: the permissions on the new inode | |
948 | * | |
949 | * @ghs[0] is an initialized holder for the directory | |
950 | * @ghs[1] is the holder for the inode lock | |
951 | * | |
7359a19c | 952 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
953 | * file are held. A transaction has been started and an inplace reservation |
954 | * is held, as well. | |
955 | * | |
7359a19c | 956 | * Returns: An inode |
b3b94faa DT |
957 | */ |
958 | ||
feaa7bba | 959 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
e7f14f4d | 960 | unsigned int mode, dev_t dev) |
b3b94faa | 961 | { |
e1cc8603 | 962 | struct inode *inode = NULL; |
5c676f6d | 963 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
964 | struct inode *dir = &dip->i_inode; |
965 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
dbb7cae2 | 966 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
b3b94faa | 967 | int error; |
4340fe62 | 968 | u64 generation; |
e9bd2b3b | 969 | struct buffer_head *bh=NULL; |
b3b94faa DT |
970 | |
971 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 972 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 973 | |
b3b94faa DT |
974 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
975 | error = gfs2_glock_nq(ghs); | |
976 | if (error) | |
977 | goto fail; | |
978 | ||
979 | error = create_ok(dip, name, mode); | |
980 | if (error) | |
981 | goto fail_gunlock; | |
982 | ||
feaa7bba | 983 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
b3b94faa DT |
984 | if (error) |
985 | goto fail_gunlock; | |
986 | ||
dbb7cae2 | 987 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
b3b94faa DT |
988 | if (error) |
989 | goto fail_gunlock; | |
990 | ||
28626e20 SW |
991 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
992 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
993 | if (error) | |
994 | goto fail_gunlock; | |
b3b94faa | 995 | |
e9bd2b3b | 996 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh); |
b3b94faa DT |
997 | if (error) |
998 | goto fail_gunlock2; | |
999 | ||
bb9bcf06 WC |
1000 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), |
1001 | inum.no_addr, | |
7a9f53b3 | 1002 | inum.no_formal_ino, 0); |
feaa7bba | 1003 | if (IS_ERR(inode)) |
b3b94faa DT |
1004 | goto fail_gunlock2; |
1005 | ||
e9bd2b3b WC |
1006 | gfs2_inode_bh(GFS2_I(inode), bh); |
1007 | ||
feaa7bba | 1008 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa | 1009 | if (error) |
e1cc8603 | 1010 | goto fail_gunlock2; |
b3b94faa | 1011 | |
feaa7bba | 1012 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
b3b94faa | 1013 | if (error) |
e1cc8603 | 1014 | goto fail_gunlock2; |
b3b94faa | 1015 | |
fcb47e0b RH |
1016 | error = gfs2_security_init(dip, GFS2_I(inode)); |
1017 | if (error) | |
e1cc8603 | 1018 | goto fail_gunlock2; |
fcb47e0b | 1019 | |
feaa7bba | 1020 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa | 1021 | if (error) |
e1cc8603 | 1022 | goto fail_gunlock2; |
b3b94faa | 1023 | |
7359a19c SW |
1024 | if (!inode) |
1025 | return ERR_PTR(-ENOMEM); | |
1026 | return inode; | |
b3b94faa | 1027 | |
320dd101 | 1028 | fail_gunlock2: |
b3b94faa | 1029 | gfs2_glock_dq_uninit(ghs + 1); |
e1cc8603 SW |
1030 | if (inode) |
1031 | iput(inode); | |
320dd101 | 1032 | fail_gunlock: |
b3b94faa | 1033 | gfs2_glock_dq(ghs); |
320dd101 | 1034 | fail: |
7359a19c | 1035 | return ERR_PTR(error); |
b3b94faa DT |
1036 | } |
1037 | ||
b3b94faa DT |
1038 | /** |
1039 | * gfs2_rmdiri - Remove a directory | |
1040 | * @dip: The parent directory of the directory to be removed | |
1041 | * @name: The name of the directory to be removed | |
1042 | * @ip: The GFS2 inode of the directory to be removed | |
1043 | * | |
1044 | * Assumes Glocks on dip and ip are held | |
1045 | * | |
1046 | * Returns: errno | |
1047 | */ | |
1048 | ||
feaa7bba SW |
1049 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
1050 | struct gfs2_inode *ip) | |
b3b94faa | 1051 | { |
b3b94faa DT |
1052 | struct qstr dotname; |
1053 | int error; | |
1054 | ||
1055 | if (ip->i_di.di_entries != 2) { | |
1056 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 1057 | gfs2_dinode_print(ip); |
b3b94faa DT |
1058 | return -EIO; |
1059 | } | |
1060 | ||
1061 | error = gfs2_dir_del(dip, name); | |
1062 | if (error) | |
1063 | return error; | |
1064 | ||
1065 | error = gfs2_change_nlink(dip, -1); | |
1066 | if (error) | |
1067 | return error; | |
1068 | ||
71b86f56 | 1069 | gfs2_str2qstr(&dotname, "."); |
b3b94faa DT |
1070 | error = gfs2_dir_del(ip, &dotname); |
1071 | if (error) | |
1072 | return error; | |
1073 | ||
feaa7bba | 1074 | gfs2_str2qstr(&dotname, ".."); |
b3b94faa DT |
1075 | error = gfs2_dir_del(ip, &dotname); |
1076 | if (error) | |
1077 | return error; | |
1078 | ||
4f56110a SW |
1079 | /* It looks odd, but it really should be done twice */ |
1080 | error = gfs2_change_nlink(ip, -1); | |
1081 | if (error) | |
1082 | return error; | |
1083 | ||
1084 | error = gfs2_change_nlink(ip, -1); | |
b3b94faa DT |
1085 | if (error) |
1086 | return error; | |
1087 | ||
b3b94faa DT |
1088 | return error; |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1093 | * @dip: the directory | |
1094 | * @name: the name of the file | |
1095 | * @ip: the inode | |
1096 | * | |
1097 | * Assumes that the lock on (at least) @dip is held. | |
1098 | * | |
1099 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1100 | */ | |
1101 | ||
feaa7bba | 1102 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
dbb7cae2 | 1103 | const struct gfs2_inode *ip) |
b3b94faa | 1104 | { |
b3b94faa DT |
1105 | int error; |
1106 | ||
feaa7bba | 1107 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1108 | return -EPERM; |
1109 | ||
b60623c2 | 1110 | if ((dip->i_inode.i_mode & S_ISVTX) && |
2933f925 SW |
1111 | dip->i_inode.i_uid != current->fsuid && |
1112 | ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER)) | |
b3b94faa DT |
1113 | return -EPERM; |
1114 | ||
feaa7bba | 1115 | if (IS_APPEND(&dip->i_inode)) |
b3b94faa DT |
1116 | return -EPERM; |
1117 | ||
faf450ef | 1118 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
1119 | if (error) |
1120 | return error; | |
1121 | ||
dbb7cae2 | 1122 | error = gfs2_dir_check(&dip->i_inode, name, ip); |
b3b94faa DT |
1123 | if (error) |
1124 | return error; | |
1125 | ||
b3b94faa DT |
1126 | return 0; |
1127 | } | |
1128 | ||
1129 | /* | |
1130 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1131 | * @this: move this | |
1132 | * @to: to here | |
1133 | * | |
1134 | * Follow @to back to the root and make sure we don't encounter @this | |
1135 | * Assumes we already hold the rename lock. | |
1136 | * | |
1137 | * Returns: errno | |
1138 | */ | |
1139 | ||
1140 | int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1141 | { | |
feaa7bba | 1142 | struct inode *dir = &to->i_inode; |
c9fd4307 | 1143 | struct super_block *sb = dir->i_sb; |
7359a19c | 1144 | struct inode *tmp; |
b3b94faa DT |
1145 | struct qstr dotdot; |
1146 | int error = 0; | |
1147 | ||
71b86f56 | 1148 | gfs2_str2qstr(&dotdot, ".."); |
b3b94faa | 1149 | |
7359a19c | 1150 | igrab(dir); |
b3b94faa DT |
1151 | |
1152 | for (;;) { | |
feaa7bba | 1153 | if (dir == &this->i_inode) { |
b3b94faa DT |
1154 | error = -EINVAL; |
1155 | break; | |
1156 | } | |
c9fd4307 | 1157 | if (dir == sb->s_root->d_inode) { |
b3b94faa DT |
1158 | error = 0; |
1159 | break; | |
1160 | } | |
1161 | ||
c752666c SW |
1162 | tmp = gfs2_lookupi(dir, &dotdot, 1, NULL); |
1163 | if (IS_ERR(tmp)) { | |
1164 | error = PTR_ERR(tmp); | |
b3b94faa | 1165 | break; |
c752666c | 1166 | } |
b3b94faa | 1167 | |
7359a19c SW |
1168 | iput(dir); |
1169 | dir = tmp; | |
b3b94faa DT |
1170 | } |
1171 | ||
7359a19c | 1172 | iput(dir); |
b3b94faa DT |
1173 | |
1174 | return error; | |
1175 | } | |
1176 | ||
1177 | /** | |
1178 | * gfs2_readlinki - return the contents of a symlink | |
1179 | * @ip: the symlink's inode | |
1180 | * @buf: a pointer to the buffer to be filled | |
1181 | * @len: a pointer to the length of @buf | |
1182 | * | |
1183 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1184 | * to be freed by the caller. | |
1185 | * | |
1186 | * Returns: errno | |
1187 | */ | |
1188 | ||
1189 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1190 | { | |
1191 | struct gfs2_holder i_gh; | |
1192 | struct buffer_head *dibh; | |
1193 | unsigned int x; | |
1194 | int error; | |
1195 | ||
1196 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); | |
1197 | error = gfs2_glock_nq_atime(&i_gh); | |
1198 | if (error) { | |
1199 | gfs2_holder_uninit(&i_gh); | |
1200 | return error; | |
1201 | } | |
1202 | ||
1203 | if (!ip->i_di.di_size) { | |
1204 | gfs2_consist_inode(ip); | |
1205 | error = -EIO; | |
1206 | goto out; | |
1207 | } | |
1208 | ||
1209 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1210 | if (error) | |
1211 | goto out; | |
1212 | ||
1213 | x = ip->i_di.di_size + 1; | |
1214 | if (x > *len) { | |
1215 | *buf = kmalloc(x, GFP_KERNEL); | |
1216 | if (!*buf) { | |
1217 | error = -ENOMEM; | |
1218 | goto out_brelse; | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1223 | *len = x; | |
1224 | ||
feaa7bba | 1225 | out_brelse: |
b3b94faa | 1226 | brelse(dibh); |
feaa7bba | 1227 | out: |
b3b94faa | 1228 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1229 | return error; |
1230 | } | |
1231 | ||
1232 | /** | |
1233 | * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and | |
1234 | * conditionally update the inode's atime | |
1235 | * @gh: the holder to acquire | |
1236 | * | |
1237 | * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap | |
1238 | * Update if the difference between the current time and the inode's current | |
1239 | * atime is greater than an interval specified at mount. | |
1240 | * | |
1241 | * Returns: errno | |
1242 | */ | |
1243 | ||
1244 | int gfs2_glock_nq_atime(struct gfs2_holder *gh) | |
1245 | { | |
1246 | struct gfs2_glock *gl = gh->gh_gl; | |
1247 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
5c676f6d | 1248 | struct gfs2_inode *ip = gl->gl_object; |
4bd91ba1 | 1249 | s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum); |
b3b94faa DT |
1250 | unsigned int state; |
1251 | int flags; | |
1252 | int error; | |
4bd91ba1 | 1253 | struct timespec tv = CURRENT_TIME; |
b3b94faa DT |
1254 | |
1255 | if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) || | |
1256 | gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) || | |
1257 | gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops)) | |
1258 | return -EINVAL; | |
1259 | ||
1260 | state = gh->gh_state; | |
1261 | flags = gh->gh_flags; | |
1262 | ||
1263 | error = gfs2_glock_nq(gh); | |
1264 | if (error) | |
1265 | return error; | |
1266 | ||
1267 | if (test_bit(SDF_NOATIME, &sdp->sd_flags) || | |
1268 | (sdp->sd_vfs->s_flags & MS_RDONLY)) | |
1269 | return 0; | |
1270 | ||
4bd91ba1 | 1271 | if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) { |
b3b94faa | 1272 | gfs2_glock_dq(gh); |
fd88de56 SW |
1273 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY, |
1274 | gh); | |
b3b94faa DT |
1275 | error = gfs2_glock_nq(gh); |
1276 | if (error) | |
1277 | return error; | |
1278 | ||
1279 | /* Verify that atime hasn't been updated while we were | |
1280 | trying to get exclusive lock. */ | |
1281 | ||
4bd91ba1 SW |
1282 | tv = CURRENT_TIME; |
1283 | if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) { | |
b3b94faa | 1284 | struct buffer_head *dibh; |
48516ced | 1285 | struct gfs2_dinode *di; |
b3b94faa DT |
1286 | |
1287 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
1288 | if (error == -EROFS) | |
1289 | return 0; | |
1290 | if (error) | |
1291 | goto fail; | |
1292 | ||
1293 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1294 | if (error) | |
1295 | goto fail_end_trans; | |
1296 | ||
4bd91ba1 | 1297 | ip->i_inode.i_atime = tv; |
b3b94faa | 1298 | |
d4e9c4c3 | 1299 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
48516ced | 1300 | di = (struct gfs2_dinode *)dibh->b_data; |
1a7b1eed | 1301 | di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
4bd91ba1 | 1302 | di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
b3b94faa DT |
1303 | brelse(dibh); |
1304 | ||
1305 | gfs2_trans_end(sdp); | |
1306 | } | |
1307 | ||
1308 | /* If someone else has asked for the glock, | |
1309 | unlock and let them have it. Then reacquire | |
1310 | in the original state. */ | |
1311 | if (gfs2_glock_is_blocking(gl)) { | |
1312 | gfs2_glock_dq(gh); | |
1313 | gfs2_holder_reinit(state, flags, gh); | |
1314 | return gfs2_glock_nq(gh); | |
1315 | } | |
1316 | } | |
1317 | ||
1318 | return 0; | |
1319 | ||
feaa7bba | 1320 | fail_end_trans: |
b3b94faa | 1321 | gfs2_trans_end(sdp); |
feaa7bba | 1322 | fail: |
b3b94faa | 1323 | gfs2_glock_dq(gh); |
b3b94faa DT |
1324 | return error; |
1325 | } | |
1326 | ||
b3b94faa DT |
1327 | static int |
1328 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1329 | { | |
1330 | struct buffer_head *dibh; | |
1331 | int error; | |
1332 | ||
1333 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1334 | if (!error) { | |
feaa7bba SW |
1335 | error = inode_setattr(&ip->i_inode, attr); |
1336 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
d4e9c4c3 | 1337 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1338 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1339 | brelse(dibh); |
1340 | } | |
1341 | return error; | |
1342 | } | |
1343 | ||
1344 | /** | |
1345 | * gfs2_setattr_simple - | |
1346 | * @ip: | |
1347 | * @attr: | |
1348 | * | |
1349 | * Called with a reference on the vnode. | |
1350 | * | |
1351 | * Returns: errno | |
1352 | */ | |
1353 | ||
1354 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1355 | { | |
1356 | int error; | |
1357 | ||
5c676f6d | 1358 | if (current->journal_info) |
b3b94faa DT |
1359 | return __gfs2_setattr_simple(ip, attr); |
1360 | ||
feaa7bba | 1361 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
1362 | if (error) |
1363 | return error; | |
1364 | ||
1365 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 1366 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1367 | return error; |
1368 | } | |
1369 | ||
bb8d8a6f SW |
1370 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
1371 | { | |
1372 | const struct gfs2_dinode_host *di = &ip->i_di; | |
1373 | struct gfs2_dinode *str = buf; | |
1374 | ||
1375 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
1376 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
1377 | str->di_header.__pad0 = 0; | |
1378 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); | |
1379 | str->di_header.__pad1 = 0; | |
1380 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); | |
1381 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
1382 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
1383 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); | |
1384 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); | |
1385 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); | |
1386 | str->di_size = cpu_to_be64(di->di_size); | |
1387 | str->di_blocks = cpu_to_be64(di->di_blocks); | |
1388 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); | |
1389 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
1390 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
1391 | ||
1392 | str->di_goal_meta = cpu_to_be64(di->di_goal_meta); | |
1393 | str->di_goal_data = cpu_to_be64(di->di_goal_data); | |
1394 | str->di_generation = cpu_to_be64(di->di_generation); | |
1395 | ||
1396 | str->di_flags = cpu_to_be32(di->di_flags); | |
1397 | str->di_height = cpu_to_be16(di->di_height); | |
1398 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && | |
1399 | !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ? | |
1400 | GFS2_FORMAT_DE : 0); | |
1401 | str->di_depth = cpu_to_be16(di->di_depth); | |
1402 | str->di_entries = cpu_to_be32(di->di_entries); | |
1403 | ||
1404 | str->di_eattr = cpu_to_be64(di->di_eattr); | |
4bd91ba1 SW |
1405 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
1406 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
1407 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
bb8d8a6f SW |
1408 | } |
1409 | ||
1410 | void gfs2_dinode_print(const struct gfs2_inode *ip) | |
1411 | { | |
1412 | const struct gfs2_dinode_host *di = &ip->i_di; | |
1413 | ||
1414 | printk(KERN_INFO " no_formal_ino = %llu\n", | |
1415 | (unsigned long long)ip->i_no_formal_ino); | |
1416 | printk(KERN_INFO " no_addr = %llu\n", | |
1417 | (unsigned long long)ip->i_no_addr); | |
1418 | printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size); | |
1419 | printk(KERN_INFO " di_blocks = %llu\n", | |
1420 | (unsigned long long)di->di_blocks); | |
1421 | printk(KERN_INFO " di_goal_meta = %llu\n", | |
1422 | (unsigned long long)di->di_goal_meta); | |
1423 | printk(KERN_INFO " di_goal_data = %llu\n", | |
1424 | (unsigned long long)di->di_goal_data); | |
1425 | printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags); | |
1426 | printk(KERN_INFO " di_height = %u\n", di->di_height); | |
1427 | printk(KERN_INFO " di_depth = %u\n", di->di_depth); | |
1428 | printk(KERN_INFO " di_entries = %u\n", di->di_entries); | |
1429 | printk(KERN_INFO " di_eattr = %llu\n", | |
1430 | (unsigned long long)di->di_eattr); | |
1431 | } | |
1432 |