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