Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
ca390601 | 3 | * Copyright (C) 2004-2008 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> |
fcb47e0b | 19 | #include <linux/security.h> |
719ee344 | 20 | #include <linux/time.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" | |
307cf6e6 | 27 | #include "xattr.h" |
b3b94faa DT |
28 | #include "glock.h" |
29 | #include "glops.h" | |
30 | #include "inode.h" | |
31 | #include "log.h" | |
32 | #include "meta_io.h" | |
b3b94faa DT |
33 | #include "quota.h" |
34 | #include "rgrp.h" | |
35 | #include "trans.h" | |
5c676f6d | 36 | #include "util.h" |
b3b94faa | 37 | |
44ad37d6 BP |
38 | struct gfs2_skip_data { |
39 | u64 no_addr; | |
40 | int skipped; | |
41 | int non_block; | |
42 | }; | |
43 | ||
feaa7bba SW |
44 | static int iget_test(struct inode *inode, void *opaque) |
45 | { | |
46 | struct gfs2_inode *ip = GFS2_I(inode); | |
44ad37d6 | 47 | struct gfs2_skip_data *data = opaque; |
feaa7bba | 48 | |
44ad37d6 BP |
49 | if (ip->i_no_addr == data->no_addr) { |
50 | if (data->non_block && | |
51 | inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) { | |
52 | data->skipped = 1; | |
53 | return 0; | |
54 | } | |
feaa7bba | 55 | return 1; |
44ad37d6 | 56 | } |
feaa7bba SW |
57 | return 0; |
58 | } | |
59 | ||
60 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 61 | { |
feaa7bba | 62 | struct gfs2_inode *ip = GFS2_I(inode); |
44ad37d6 | 63 | struct gfs2_skip_data *data = opaque; |
b3b94faa | 64 | |
44ad37d6 BP |
65 | if (data->skipped) |
66 | return -ENOENT; | |
67 | inode->i_ino = (unsigned long)(data->no_addr); | |
68 | ip->i_no_addr = data->no_addr; | |
feaa7bba SW |
69 | return 0; |
70 | } | |
b3b94faa | 71 | |
4667a0ec | 72 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block) |
feaa7bba | 73 | { |
dbb7cae2 | 74 | unsigned long hash = (unsigned long)no_addr; |
44ad37d6 BP |
75 | struct gfs2_skip_data data; |
76 | ||
77 | data.no_addr = no_addr; | |
78 | data.skipped = 0; | |
4667a0ec | 79 | data.non_block = non_block; |
44ad37d6 | 80 | return ilookup5(sb, hash, iget_test, &data); |
feaa7bba | 81 | } |
b3b94faa | 82 | |
44ad37d6 BP |
83 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr, |
84 | int non_block) | |
feaa7bba | 85 | { |
44ad37d6 | 86 | struct gfs2_skip_data data; |
dbb7cae2 | 87 | unsigned long hash = (unsigned long)no_addr; |
44ad37d6 BP |
88 | |
89 | data.no_addr = no_addr; | |
90 | data.skipped = 0; | |
91 | data.non_block = non_block; | |
92 | return iget5_locked(sb, hash, iget_test, iget_set, &data); | |
b3b94faa DT |
93 | } |
94 | ||
35dcc52e | 95 | /** |
24d9765f SW |
96 | * gfs2_set_iop - Sets inode operations |
97 | * @inode: The inode with correct i_mode filled in | |
35dcc52e | 98 | * |
24d9765f SW |
99 | * GFS2 lookup code fills in vfs inode contents based on info obtained |
100 | * from directory entry inside gfs2_inode_lookup(). | |
101 | */ | |
35dcc52e | 102 | |
24d9765f | 103 | static void gfs2_set_iop(struct inode *inode) |
35dcc52e | 104 | { |
c97bfe43 | 105 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
35dcc52e WC |
106 | umode_t mode = inode->i_mode; |
107 | ||
108 | if (S_ISREG(mode)) { | |
109 | inode->i_op = &gfs2_file_iops; | |
f057f6cd | 110 | if (gfs2_localflocks(sdp)) |
10d21988 | 111 | inode->i_fop = &gfs2_file_fops_nolock; |
c97bfe43 | 112 | else |
10d21988 | 113 | inode->i_fop = &gfs2_file_fops; |
35dcc52e WC |
114 | } else if (S_ISDIR(mode)) { |
115 | inode->i_op = &gfs2_dir_iops; | |
f057f6cd | 116 | if (gfs2_localflocks(sdp)) |
10d21988 | 117 | inode->i_fop = &gfs2_dir_fops_nolock; |
c97bfe43 | 118 | else |
10d21988 | 119 | inode->i_fop = &gfs2_dir_fops; |
35dcc52e WC |
120 | } else if (S_ISLNK(mode)) { |
121 | inode->i_op = &gfs2_symlink_iops; | |
122 | } else { | |
d83225d4 | 123 | inode->i_op = &gfs2_file_iops; |
43a33c53 | 124 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
35dcc52e | 125 | } |
35dcc52e WC |
126 | } |
127 | ||
b3b94faa | 128 | /** |
feaa7bba SW |
129 | * gfs2_inode_lookup - Lookup an inode |
130 | * @sb: The super block | |
dbb7cae2 | 131 | * @no_addr: The inode number |
feaa7bba | 132 | * @type: The type of the inode |
44ad37d6 | 133 | * non_block: Can we block on inodes that are being freed? |
b3b94faa | 134 | * |
feaa7bba | 135 | * Returns: A VFS inode, or an error |
b3b94faa DT |
136 | */ |
137 | ||
24d9765f | 138 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, |
44ad37d6 | 139 | u64 no_addr, u64 no_formal_ino, int non_block) |
b3b94faa | 140 | { |
7a9f53b3 BM |
141 | struct inode *inode; |
142 | struct gfs2_inode *ip; | |
b1becbde | 143 | struct gfs2_glock *io_gl = NULL; |
feaa7bba | 144 | int error; |
b3b94faa | 145 | |
44ad37d6 | 146 | inode = gfs2_iget(sb, no_addr, non_block); |
7a9f53b3 BM |
147 | ip = GFS2_I(inode); |
148 | ||
26d83ded SW |
149 | if (!inode) |
150 | return ERR_PTR(-ENOBUFS); | |
151 | ||
feaa7bba SW |
152 | if (inode->i_state & I_NEW) { |
153 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
bb9bcf06 | 154 | ip->i_no_formal_ino = no_formal_ino; |
b3b94faa | 155 | |
dbb7cae2 | 156 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
feaa7bba SW |
157 | if (unlikely(error)) |
158 | goto fail; | |
159 | ip->i_gl->gl_object = ip; | |
b3b94faa | 160 | |
dbb7cae2 | 161 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
feaa7bba SW |
162 | if (unlikely(error)) |
163 | goto fail_put; | |
b3b94faa | 164 | |
bfded27b | 165 | set_bit(GIF_INVALID, &ip->i_flags); |
feaa7bba SW |
166 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
167 | if (unlikely(error)) | |
168 | goto fail_iopen; | |
b3b94faa | 169 | |
24d9765f | 170 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
feaa7bba | 171 | gfs2_glock_put(io_gl); |
b1becbde | 172 | io_gl = NULL; |
c8cdf479 | 173 | |
c8cdf479 | 174 | if (type == DT_UNKNOWN) { |
24d9765f SW |
175 | /* Inode glock must be locked already */ |
176 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
177 | if (error) | |
178 | goto fail_refresh; | |
179 | } else { | |
180 | inode->i_mode = DT2IF(type); | |
c8cdf479 SW |
181 | } |
182 | ||
35dcc52e | 183 | gfs2_set_iop(inode); |
24d9765f | 184 | unlock_new_inode(inode); |
feaa7bba | 185 | } |
b3b94faa DT |
186 | |
187 | return inode; | |
24d9765f SW |
188 | |
189 | fail_refresh: | |
190 | ip->i_iopen_gh.gh_gl->gl_object = NULL; | |
191 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
feaa7bba | 192 | fail_iopen: |
b1becbde BP |
193 | if (io_gl) |
194 | gfs2_glock_put(io_gl); | |
feaa7bba | 195 | fail_put: |
24d9765f | 196 | ip->i_gl->gl_object = NULL; |
feaa7bba SW |
197 | gfs2_glock_put(ip->i_gl); |
198 | fail: | |
24d9765f | 199 | iget_failed(inode); |
feaa7bba | 200 | return ERR_PTR(error); |
b3b94faa DT |
201 | } |
202 | ||
044b9414 SW |
203 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, |
204 | u64 *no_formal_ino, unsigned int blktype) | |
1a0eae88 | 205 | { |
044b9414 SW |
206 | struct super_block *sb = sdp->sd_vfs; |
207 | struct gfs2_holder i_gh; | |
44ad37d6 | 208 | struct inode *inode = NULL; |
044b9414 | 209 | int error; |
1a0eae88 | 210 | |
44ad37d6 | 211 | /* Must not read in block until block type is verified */ |
044b9414 | 212 | error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, |
44ad37d6 | 213 | LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); |
044b9414 SW |
214 | if (error) |
215 | return ERR_PTR(error); | |
1a0eae88 | 216 | |
044b9414 SW |
217 | error = gfs2_check_blk_type(sdp, no_addr, blktype); |
218 | if (error) | |
1a0eae88 | 219 | goto fail; |
1a0eae88 | 220 | |
44ad37d6 | 221 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); |
044b9414 SW |
222 | if (IS_ERR(inode)) |
223 | goto fail; | |
ed4878e8 | 224 | |
044b9414 SW |
225 | /* Two extra checks for NFS only */ |
226 | if (no_formal_ino) { | |
227 | error = -ESTALE; | |
228 | if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) | |
229 | goto fail_iput; | |
ed4878e8 | 230 | |
044b9414 SW |
231 | error = -EIO; |
232 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
233 | goto fail_iput; | |
ed4878e8 | 234 | |
044b9414 SW |
235 | error = 0; |
236 | } | |
1a0eae88 | 237 | |
1a0eae88 | 238 | fail: |
044b9414 SW |
239 | gfs2_glock_dq_uninit(&i_gh); |
240 | return error ? ERR_PTR(error) : inode; | |
241 | fail_iput: | |
242 | iput(inode); | |
243 | goto fail; | |
1a0eae88 BP |
244 | } |
245 | ||
b3b94faa | 246 | |
c752666c SW |
247 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
248 | { | |
249 | struct qstr qstr; | |
6c93fd1e | 250 | struct inode *inode; |
71b86f56 | 251 | gfs2_str2qstr(&qstr, name); |
a569c711 | 252 | inode = gfs2_lookupi(dip, &qstr, 1); |
6c93fd1e RC |
253 | /* gfs2_lookupi has inconsistent callers: vfs |
254 | * related routines expect NULL for no entry found, | |
255 | * gfs2_lookup_simple callers expect ENOENT | |
256 | * and do not check for NULL. | |
257 | */ | |
258 | if (inode == NULL) | |
259 | return ERR_PTR(-ENOENT); | |
260 | else | |
261 | return inode; | |
c752666c SW |
262 | } |
263 | ||
264 | ||
b3b94faa DT |
265 | /** |
266 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
267 | * @d_gh: An initialized holder for the directory glock | |
268 | * @name: The name of the inode to look for | |
269 | * @is_root: If 1, ignore the caller's permissions | |
270 | * @i_gh: An uninitialized holder for the new inode glock | |
271 | * | |
d7c103d0 SW |
272 | * This can be called via the VFS filldir function when NFS is doing |
273 | * a readdirplus and the inode which its intending to stat isn't | |
274 | * already in cache. In this case we must not take the directory glock | |
275 | * again, since the readdir call will have already taken that lock. | |
b3b94faa DT |
276 | * |
277 | * Returns: errno | |
278 | */ | |
279 | ||
feaa7bba | 280 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
a569c711 | 281 | int is_root) |
b3b94faa | 282 | { |
c9fd4307 | 283 | struct super_block *sb = dir->i_sb; |
feaa7bba | 284 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 285 | struct gfs2_holder d_gh; |
037bcbb7 | 286 | int error = 0; |
c752666c | 287 | struct inode *inode = NULL; |
d7c103d0 | 288 | int unlock = 0; |
b3b94faa DT |
289 | |
290 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 291 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 292 | |
c752666c SW |
293 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
294 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
295 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
296 | igrab(dir); |
297 | return dir; | |
b3b94faa DT |
298 | } |
299 | ||
7afd88d9 | 300 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { |
d7c103d0 SW |
301 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
302 | if (error) | |
303 | return ERR_PTR(error); | |
304 | unlock = 1; | |
305 | } | |
b3b94faa DT |
306 | |
307 | if (!is_root) { | |
b74c79e9 | 308 | error = gfs2_permission(dir, MAY_EXEC, 0); |
b3b94faa DT |
309 | if (error) |
310 | goto out; | |
311 | } | |
312 | ||
dbb7cae2 SW |
313 | inode = gfs2_dir_search(dir, name); |
314 | if (IS_ERR(inode)) | |
315 | error = PTR_ERR(inode); | |
7359a19c | 316 | out: |
d7c103d0 SW |
317 | if (unlock) |
318 | gfs2_glock_dq_uninit(&d_gh); | |
c752666c SW |
319 | if (error == -ENOENT) |
320 | return NULL; | |
d7c103d0 | 321 | return inode ? inode : ERR_PTR(error); |
b3b94faa DT |
322 | } |
323 | ||
b3b94faa DT |
324 | /** |
325 | * create_ok - OK to create a new on-disk inode here? | |
326 | * @dip: Directory in which dinode is to be created | |
327 | * @name: Name of new dinode | |
328 | * @mode: | |
329 | * | |
330 | * Returns: errno | |
331 | */ | |
332 | ||
feaa7bba | 333 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
334 | unsigned int mode) |
335 | { | |
336 | int error; | |
337 | ||
b74c79e9 | 338 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, 0); |
b3b94faa DT |
339 | if (error) |
340 | return error; | |
341 | ||
342 | /* Don't create entries in an unlinked directory */ | |
4f56110a | 343 | if (!dip->i_inode.i_nlink) |
d192a8e5 | 344 | return -ENOENT; |
b3b94faa | 345 | |
dbb7cae2 | 346 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
b3b94faa DT |
347 | switch (error) { |
348 | case -ENOENT: | |
349 | error = 0; | |
350 | break; | |
351 | case 0: | |
352 | return -EEXIST; | |
353 | default: | |
354 | return error; | |
355 | } | |
356 | ||
ad6203f2 | 357 | if (dip->i_entries == (u32)-1) |
b3b94faa | 358 | return -EFBIG; |
4f56110a | 359 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
360 | return -EMLINK; |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
366 | unsigned int *uid, unsigned int *gid) | |
367 | { | |
feaa7bba | 368 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
2933f925 | 369 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
b3b94faa DT |
370 | if (S_ISDIR(*mode)) |
371 | *mode |= S_ISUID; | |
3de7be33 | 372 | else if (dip->i_inode.i_uid != current_fsuid()) |
b3b94faa | 373 | *mode &= ~07111; |
2933f925 | 374 | *uid = dip->i_inode.i_uid; |
b3b94faa | 375 | } else |
3de7be33 | 376 | *uid = current_fsuid(); |
b3b94faa | 377 | |
b60623c2 | 378 | if (dip->i_inode.i_mode & S_ISGID) { |
b3b94faa DT |
379 | if (S_ISDIR(*mode)) |
380 | *mode |= S_ISGID; | |
2933f925 | 381 | *gid = dip->i_inode.i_gid; |
b3b94faa | 382 | } else |
3de7be33 | 383 | *gid = current_fsgid(); |
b3b94faa DT |
384 | } |
385 | ||
dbb7cae2 | 386 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) |
b3b94faa | 387 | { |
feaa7bba | 388 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
389 | int error; |
390 | ||
6dbd8224 SW |
391 | if (gfs2_alloc_get(dip) == NULL) |
392 | return -ENOMEM; | |
b3b94faa | 393 | |
6dbd8224 | 394 | dip->i_alloc->al_requested = RES_DINODE; |
b3b94faa DT |
395 | error = gfs2_inplace_reserve(dip); |
396 | if (error) | |
397 | goto out; | |
398 | ||
feaa7bba | 399 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
400 | if (error) |
401 | goto out_ipreserv; | |
402 | ||
6050b9c7 | 403 | error = gfs2_alloc_di(dip, no_addr, generation); |
b3b94faa DT |
404 | |
405 | gfs2_trans_end(sdp); | |
406 | ||
4340fe62 | 407 | out_ipreserv: |
b3b94faa | 408 | gfs2_inplace_release(dip); |
4340fe62 | 409 | out: |
b3b94faa | 410 | gfs2_alloc_put(dip); |
b3b94faa DT |
411 | return error; |
412 | } | |
413 | ||
414 | /** | |
415 | * init_dinode - Fill in a new dinode structure | |
416 | * @dip: the directory this inode is being created in | |
417 | * @gl: The glock covering the new inode | |
418 | * @inum: the inode number | |
419 | * @mode: the file permissions | |
420 | * @uid: | |
421 | * @gid: | |
422 | * | |
423 | */ | |
424 | ||
425 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 426 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 | 427 | unsigned int uid, unsigned int gid, |
e9bd2b3b | 428 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 429 | { |
feaa7bba | 430 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 431 | struct gfs2_dinode *di; |
b3b94faa | 432 | struct buffer_head *dibh; |
4bd91ba1 | 433 | struct timespec tv = CURRENT_TIME; |
b3b94faa DT |
434 | |
435 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 436 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
437 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
438 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
439 | di = (struct gfs2_dinode *)dibh->b_data; |
440 | ||
2442a098 SW |
441 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
442 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
443 | di->di_mode = cpu_to_be32(mode); |
444 | di->di_uid = cpu_to_be32(uid); | |
445 | di->di_gid = cpu_to_be32(gid); | |
294caaa3 SW |
446 | di->di_nlink = 0; |
447 | di->di_size = 0; | |
b96ca4fa | 448 | di->di_blocks = cpu_to_be64(1); |
4bd91ba1 | 449 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); |
e7f14f4d SW |
450 | di->di_major = cpu_to_be32(MAJOR(dev)); |
451 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
b96ca4fa | 452 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
4340fe62 | 453 | di->di_generation = cpu_to_be64(*generation); |
294caaa3 | 454 | di->di_flags = 0; |
b3b94faa DT |
455 | |
456 | if (S_ISREG(mode)) { | |
383f01fb | 457 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || |
b3b94faa | 458 | gfs2_tune_get(sdp, gt_new_files_jdata)) |
b96ca4fa | 459 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa | 460 | } else if (S_ISDIR(mode)) { |
383f01fb | 461 | di->di_flags |= cpu_to_be32(dip->i_diskflags & |
568f4c96 | 462 | GFS2_DIF_INHERIT_JDATA); |
b3b94faa DT |
463 | } |
464 | ||
b96ca4fa | 465 | di->__pad1 = 0; |
a9583c79 | 466 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); |
294caaa3 | 467 | di->di_height = 0; |
b96ca4fa SW |
468 | di->__pad2 = 0; |
469 | di->__pad3 = 0; | |
294caaa3 SW |
470 | di->di_depth = 0; |
471 | di->di_entries = 0; | |
b96ca4fa | 472 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
294caaa3 | 473 | di->di_eattr = 0; |
4bd91ba1 SW |
474 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
475 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
476 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
b96ca4fa | 477 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
e9bd2b3b WC |
478 | |
479 | set_buffer_uptodate(dibh); | |
b96ca4fa | 480 | |
e9bd2b3b | 481 | *bhp = dibh; |
b3b94faa DT |
482 | } |
483 | ||
484 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 485 | unsigned int mode, const struct gfs2_inum_host *inum, |
e9bd2b3b | 486 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 487 | { |
feaa7bba | 488 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
489 | unsigned int uid, gid; |
490 | int error; | |
491 | ||
492 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
182fe5ab CG |
493 | if (!gfs2_alloc_get(dip)) |
494 | return -ENOMEM; | |
b3b94faa DT |
495 | |
496 | error = gfs2_quota_lock(dip, uid, gid); | |
497 | if (error) | |
498 | goto out; | |
499 | ||
500 | error = gfs2_quota_check(dip, uid, gid); | |
501 | if (error) | |
502 | goto out_quota; | |
503 | ||
feaa7bba | 504 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
505 | if (error) |
506 | goto out_quota; | |
507 | ||
e9bd2b3b | 508 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp); |
b3b94faa | 509 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
510 | gfs2_trans_end(sdp); |
511 | ||
feaa7bba | 512 | out_quota: |
b3b94faa | 513 | gfs2_quota_unlock(dip); |
feaa7bba | 514 | out: |
b3b94faa | 515 | gfs2_alloc_put(dip); |
b3b94faa DT |
516 | return error; |
517 | } | |
518 | ||
feaa7bba SW |
519 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
520 | struct gfs2_inode *ip) | |
b3b94faa | 521 | { |
feaa7bba | 522 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
523 | struct gfs2_alloc *al; |
524 | int alloc_required; | |
525 | struct buffer_head *dibh; | |
526 | int error; | |
527 | ||
528 | al = gfs2_alloc_get(dip); | |
182fe5ab CG |
529 | if (!al) |
530 | return -ENOMEM; | |
b3b94faa DT |
531 | |
532 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
533 | if (error) | |
534 | goto fail; | |
535 | ||
feaa7bba | 536 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c | 537 | if (alloc_required < 0) |
1b8177ec | 538 | goto fail_quota_locks; |
b3b94faa | 539 | if (alloc_required) { |
2933f925 | 540 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
541 | if (error) |
542 | goto fail_quota_locks; | |
543 | ||
544 | al->al_requested = sdp->sd_max_dirres; | |
545 | ||
546 | error = gfs2_inplace_reserve(dip); | |
547 | if (error) | |
548 | goto fail_quota_locks; | |
549 | ||
320dd101 | 550 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 551 | al->al_rgd->rd_length + |
907b9bce | 552 | 2 * RES_DINODE + |
b3b94faa DT |
553 | RES_STATFS + RES_QUOTA, 0); |
554 | if (error) | |
555 | goto fail_ipreserv; | |
556 | } else { | |
feaa7bba | 557 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
558 | if (error) |
559 | goto fail_quota_locks; | |
560 | } | |
561 | ||
3d6ecb7d | 562 | error = gfs2_dir_add(&dip->i_inode, name, ip); |
b3b94faa DT |
563 | if (error) |
564 | goto fail_end_trans; | |
565 | ||
566 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
567 | if (error) | |
568 | goto fail_end_trans; | |
4f56110a | 569 | ip->i_inode.i_nlink = 1; |
d4e9c4c3 | 570 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 571 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 572 | brelse(dibh); |
b3b94faa DT |
573 | return 0; |
574 | ||
320dd101 | 575 | fail_end_trans: |
b3b94faa DT |
576 | gfs2_trans_end(sdp); |
577 | ||
320dd101 | 578 | fail_ipreserv: |
6dbd8224 | 579 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
580 | gfs2_inplace_release(dip); |
581 | ||
320dd101 | 582 | fail_quota_locks: |
b3b94faa DT |
583 | gfs2_quota_unlock(dip); |
584 | ||
320dd101 | 585 | fail: |
b3b94faa | 586 | gfs2_alloc_put(dip); |
b3b94faa DT |
587 | return error; |
588 | } | |
589 | ||
2a7dba39 EP |
590 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, |
591 | const struct qstr *qstr) | |
fcb47e0b RH |
592 | { |
593 | int err; | |
594 | size_t len; | |
595 | void *value; | |
596 | char *name; | |
fcb47e0b | 597 | |
2a7dba39 | 598 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, |
fcb47e0b RH |
599 | &name, &value, &len); |
600 | ||
601 | if (err) { | |
602 | if (err == -EOPNOTSUPP) | |
603 | return 0; | |
604 | return err; | |
605 | } | |
606 | ||
431547b3 CH |
607 | err = __gfs2_xattr_set(&ip->i_inode, name, value, len, 0, |
608 | GFS2_EATYPE_SECURITY); | |
fcb47e0b RH |
609 | kfree(value); |
610 | kfree(name); | |
611 | ||
612 | return err; | |
613 | } | |
614 | ||
b3b94faa DT |
615 | /** |
616 | * gfs2_createi - Create a new inode | |
617 | * @ghs: An array of two holders | |
618 | * @name: The name of the new file | |
619 | * @mode: the permissions on the new inode | |
620 | * | |
621 | * @ghs[0] is an initialized holder for the directory | |
622 | * @ghs[1] is the holder for the inode lock | |
623 | * | |
7359a19c | 624 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
625 | * file are held. A transaction has been started and an inplace reservation |
626 | * is held, as well. | |
627 | * | |
7359a19c | 628 | * Returns: An inode |
b3b94faa DT |
629 | */ |
630 | ||
feaa7bba | 631 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
e7f14f4d | 632 | unsigned int mode, dev_t dev) |
b3b94faa | 633 | { |
e1cc8603 | 634 | struct inode *inode = NULL; |
5c676f6d | 635 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
636 | struct inode *dir = &dip->i_inode; |
637 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
dbb7cae2 | 638 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
b3b94faa | 639 | int error; |
4340fe62 | 640 | u64 generation; |
f91a0d3e | 641 | struct buffer_head *bh = NULL; |
b3b94faa DT |
642 | |
643 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 644 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 645 | |
b3b94faa DT |
646 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
647 | error = gfs2_glock_nq(ghs); | |
648 | if (error) | |
649 | goto fail; | |
650 | ||
651 | error = create_ok(dip, name, mode); | |
652 | if (error) | |
653 | goto fail_gunlock; | |
654 | ||
dbb7cae2 | 655 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
b3b94faa DT |
656 | if (error) |
657 | goto fail_gunlock; | |
8d8291ae | 658 | inum.no_formal_ino = generation; |
b3b94faa | 659 | |
28626e20 SW |
660 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
661 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
662 | if (error) | |
663 | goto fail_gunlock; | |
b3b94faa | 664 | |
e9bd2b3b | 665 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh); |
b3b94faa DT |
666 | if (error) |
667 | goto fail_gunlock2; | |
668 | ||
8d8291ae | 669 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr, |
44ad37d6 | 670 | inum.no_formal_ino, 0); |
feaa7bba | 671 | if (IS_ERR(inode)) |
b3b94faa DT |
672 | goto fail_gunlock2; |
673 | ||
feaa7bba | 674 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa | 675 | if (error) |
e1cc8603 | 676 | goto fail_gunlock2; |
b3b94faa | 677 | |
479c427d | 678 | error = gfs2_acl_create(dip, inode); |
b3b94faa | 679 | if (error) |
e1cc8603 | 680 | goto fail_gunlock2; |
b3b94faa | 681 | |
2a7dba39 | 682 | error = gfs2_security_init(dip, GFS2_I(inode), name); |
fcb47e0b | 683 | if (error) |
e1cc8603 | 684 | goto fail_gunlock2; |
fcb47e0b | 685 | |
feaa7bba | 686 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa | 687 | if (error) |
e1cc8603 | 688 | goto fail_gunlock2; |
b3b94faa | 689 | |
f91a0d3e SW |
690 | if (bh) |
691 | brelse(bh); | |
7359a19c | 692 | return inode; |
b3b94faa | 693 | |
320dd101 | 694 | fail_gunlock2: |
b3b94faa | 695 | gfs2_glock_dq_uninit(ghs + 1); |
bd1eb881 | 696 | if (inode && !IS_ERR(inode)) |
e1cc8603 | 697 | iput(inode); |
320dd101 | 698 | fail_gunlock: |
b3b94faa | 699 | gfs2_glock_dq(ghs); |
320dd101 | 700 | fail: |
f91a0d3e SW |
701 | if (bh) |
702 | brelse(bh); | |
7359a19c | 703 | return ERR_PTR(error); |
b3b94faa DT |
704 | } |
705 | ||
536baf02 | 706 | static int __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) |
b3b94faa | 707 | { |
1025774c | 708 | struct inode *inode = &ip->i_inode; |
b3b94faa DT |
709 | struct buffer_head *dibh; |
710 | int error; | |
711 | ||
712 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1025774c CH |
713 | if (error) |
714 | return error; | |
715 | ||
1025774c CH |
716 | setattr_copy(inode, attr); |
717 | mark_inode_dirty(inode); | |
1025774c CH |
718 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
719 | gfs2_dinode_out(ip, dibh->b_data); | |
720 | brelse(dibh); | |
721 | return 0; | |
b3b94faa DT |
722 | } |
723 | ||
724 | /** | |
725 | * gfs2_setattr_simple - | |
726 | * @ip: | |
727 | * @attr: | |
728 | * | |
729 | * Called with a reference on the vnode. | |
730 | * | |
731 | * Returns: errno | |
732 | */ | |
733 | ||
734 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
735 | { | |
736 | int error; | |
737 | ||
5c676f6d | 738 | if (current->journal_info) |
b3b94faa DT |
739 | return __gfs2_setattr_simple(ip, attr); |
740 | ||
feaa7bba | 741 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
742 | if (error) |
743 | return error; | |
744 | ||
745 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 746 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
747 | return error; |
748 | } | |
749 | ||
bb8d8a6f SW |
750 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
751 | { | |
bb8d8a6f SW |
752 | struct gfs2_dinode *str = buf; |
753 | ||
754 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
755 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
bb8d8a6f | 756 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); |
bb8d8a6f SW |
757 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); |
758 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
759 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
760 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); | |
761 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); | |
762 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); | |
a2e0f799 | 763 | str->di_size = cpu_to_be64(i_size_read(&ip->i_inode)); |
77658aad | 764 | str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); |
bb8d8a6f SW |
765 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
766 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
767 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
768 | ||
ce276b06 SW |
769 | str->di_goal_meta = cpu_to_be64(ip->i_goal); |
770 | str->di_goal_data = cpu_to_be64(ip->i_goal); | |
bcf0b5b3 | 771 | str->di_generation = cpu_to_be64(ip->i_generation); |
bb8d8a6f | 772 | |
383f01fb | 773 | str->di_flags = cpu_to_be32(ip->i_diskflags); |
ecc30c79 | 774 | str->di_height = cpu_to_be16(ip->i_height); |
bb8d8a6f | 775 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
383f01fb | 776 | !(ip->i_diskflags & GFS2_DIF_EXHASH) ? |
bb8d8a6f | 777 | GFS2_FORMAT_DE : 0); |
9a004508 | 778 | str->di_depth = cpu_to_be16(ip->i_depth); |
ad6203f2 | 779 | str->di_entries = cpu_to_be32(ip->i_entries); |
bb8d8a6f | 780 | |
3767ac21 | 781 | str->di_eattr = cpu_to_be64(ip->i_eattr); |
4bd91ba1 SW |
782 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
783 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
784 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
bb8d8a6f | 785 | } |