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