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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
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> | |
b3b94faa DT |
15 | #include <linux/blkdev.h> |
16 | #include <linux/kthread.h> | |
86384605 AD |
17 | #include <linux/namei.h> |
18 | #include <linux/mount.h> | |
5c676f6d | 19 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
20 | |
21 | #include "gfs2.h" | |
5c676f6d SW |
22 | #include "lm_interface.h" |
23 | #include "incore.h" | |
b3b94faa DT |
24 | #include "daemon.h" |
25 | #include "glock.h" | |
26 | #include "glops.h" | |
27 | #include "inode.h" | |
28 | #include "lm.h" | |
29 | #include "mount.h" | |
30 | #include "ops_export.h" | |
31 | #include "ops_fstype.h" | |
32 | #include "ops_super.h" | |
33 | #include "recovery.h" | |
34 | #include "rgrp.h" | |
35 | #include "super.h" | |
b3b94faa | 36 | #include "sys.h" |
5c676f6d | 37 | #include "util.h" |
b3b94faa DT |
38 | |
39 | #define DO 0 | |
40 | #define UNDO 1 | |
41 | ||
5bb76af1 RP |
42 | extern struct dentry_operations gfs2_dops; |
43 | ||
b3b94faa DT |
44 | static struct gfs2_sbd *init_sbd(struct super_block *sb) |
45 | { | |
46 | struct gfs2_sbd *sdp; | |
b3b94faa | 47 | |
85d1da67 | 48 | sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); |
b3b94faa DT |
49 | if (!sdp) |
50 | return NULL; | |
51 | ||
5c676f6d | 52 | sb->s_fs_info = sdp; |
b3b94faa DT |
53 | sdp->sd_vfs = sb; |
54 | ||
55 | gfs2_tune_init(&sdp->sd_tune); | |
56 | ||
b3b94faa DT |
57 | INIT_LIST_HEAD(&sdp->sd_reclaim_list); |
58 | spin_lock_init(&sdp->sd_reclaim_lock); | |
59 | init_waitqueue_head(&sdp->sd_reclaim_wq); | |
b3b94faa | 60 | |
f55ab26a | 61 | mutex_init(&sdp->sd_inum_mutex); |
b3b94faa | 62 | spin_lock_init(&sdp->sd_statfs_spin); |
f55ab26a | 63 | mutex_init(&sdp->sd_statfs_mutex); |
b3b94faa DT |
64 | |
65 | spin_lock_init(&sdp->sd_rindex_spin); | |
f55ab26a | 66 | mutex_init(&sdp->sd_rindex_mutex); |
b3b94faa DT |
67 | INIT_LIST_HEAD(&sdp->sd_rindex_list); |
68 | INIT_LIST_HEAD(&sdp->sd_rindex_mru_list); | |
69 | INIT_LIST_HEAD(&sdp->sd_rindex_recent_list); | |
70 | ||
71 | INIT_LIST_HEAD(&sdp->sd_jindex_list); | |
72 | spin_lock_init(&sdp->sd_jindex_spin); | |
f55ab26a | 73 | mutex_init(&sdp->sd_jindex_mutex); |
b3b94faa | 74 | |
b3b94faa DT |
75 | INIT_LIST_HEAD(&sdp->sd_quota_list); |
76 | spin_lock_init(&sdp->sd_quota_spin); | |
f55ab26a | 77 | mutex_init(&sdp->sd_quota_mutex); |
b3b94faa DT |
78 | |
79 | spin_lock_init(&sdp->sd_log_lock); | |
b3b94faa DT |
80 | |
81 | INIT_LIST_HEAD(&sdp->sd_log_le_gl); | |
82 | INIT_LIST_HEAD(&sdp->sd_log_le_buf); | |
83 | INIT_LIST_HEAD(&sdp->sd_log_le_revoke); | |
84 | INIT_LIST_HEAD(&sdp->sd_log_le_rg); | |
85 | INIT_LIST_HEAD(&sdp->sd_log_le_databuf); | |
86 | ||
71b86f56 | 87 | mutex_init(&sdp->sd_log_reserve_mutex); |
b3b94faa DT |
88 | INIT_LIST_HEAD(&sdp->sd_ail1_list); |
89 | INIT_LIST_HEAD(&sdp->sd_ail2_list); | |
90 | ||
484adff8 | 91 | init_rwsem(&sdp->sd_log_flush_lock); |
b3b94faa DT |
92 | INIT_LIST_HEAD(&sdp->sd_log_flush_list); |
93 | ||
94 | INIT_LIST_HEAD(&sdp->sd_revoke_list); | |
95 | ||
f55ab26a | 96 | mutex_init(&sdp->sd_freeze_lock); |
b3b94faa DT |
97 | |
98 | return sdp; | |
99 | } | |
100 | ||
419c93e0 | 101 | static void init_vfs(struct super_block *sb, unsigned noatime) |
b3b94faa | 102 | { |
419c93e0 | 103 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
104 | |
105 | sb->s_magic = GFS2_MAGIC; | |
106 | sb->s_op = &gfs2_super_ops; | |
107 | sb->s_export_op = &gfs2_export_ops; | |
108 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
109 | ||
110 | if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME)) | |
419c93e0 | 111 | set_bit(noatime, &sdp->sd_flags); |
b3b94faa DT |
112 | |
113 | /* Don't let the VFS update atimes. GFS2 handles this itself. */ | |
114 | sb->s_flags |= MS_NOATIME | MS_NODIRATIME; | |
b3b94faa DT |
115 | } |
116 | ||
117 | static int init_names(struct gfs2_sbd *sdp, int silent) | |
118 | { | |
119 | struct gfs2_sb *sb = NULL; | |
120 | char *proto, *table; | |
121 | int error = 0; | |
122 | ||
123 | proto = sdp->sd_args.ar_lockproto; | |
124 | table = sdp->sd_args.ar_locktable; | |
125 | ||
126 | /* Try to autodetect */ | |
127 | ||
128 | if (!proto[0] || !table[0]) { | |
129 | struct buffer_head *bh; | |
130 | bh = sb_getblk(sdp->sd_vfs, | |
131 | GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift); | |
132 | lock_buffer(bh); | |
133 | clear_buffer_uptodate(bh); | |
134 | clear_buffer_dirty(bh); | |
135 | unlock_buffer(bh); | |
136 | ll_rw_block(READ, 1, &bh); | |
137 | wait_on_buffer(bh); | |
138 | ||
139 | if (!buffer_uptodate(bh)) { | |
140 | brelse(bh); | |
141 | return -EIO; | |
142 | } | |
143 | ||
144 | sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL); | |
145 | if (!sb) { | |
146 | brelse(bh); | |
147 | return -ENOMEM; | |
148 | } | |
149 | gfs2_sb_in(sb, bh->b_data); | |
150 | brelse(bh); | |
151 | ||
152 | error = gfs2_check_sb(sdp, sb, silent); | |
153 | if (error) | |
154 | goto out; | |
155 | ||
156 | if (!proto[0]) | |
157 | proto = sb->sb_lockproto; | |
158 | if (!table[0]) | |
159 | table = sb->sb_locktable; | |
160 | } | |
161 | ||
162 | if (!table[0]) | |
163 | table = sdp->sd_vfs->s_id; | |
164 | ||
165 | snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto); | |
166 | snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table); | |
167 | ||
a91ea69f | 168 | out: |
b3b94faa | 169 | kfree(sb); |
b3b94faa DT |
170 | return error; |
171 | } | |
172 | ||
173 | static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, | |
174 | int undo) | |
175 | { | |
176 | struct task_struct *p; | |
177 | int error = 0; | |
178 | ||
179 | if (undo) | |
180 | goto fail_trans; | |
181 | ||
182 | p = kthread_run(gfs2_scand, sdp, "gfs2_scand"); | |
183 | error = IS_ERR(p); | |
184 | if (error) { | |
185 | fs_err(sdp, "can't start scand thread: %d\n", error); | |
186 | return error; | |
187 | } | |
188 | sdp->sd_scand_process = p; | |
189 | ||
190 | for (sdp->sd_glockd_num = 0; | |
191 | sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd; | |
192 | sdp->sd_glockd_num++) { | |
193 | p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd"); | |
194 | error = IS_ERR(p); | |
195 | if (error) { | |
196 | fs_err(sdp, "can't start glockd thread: %d\n", error); | |
197 | goto fail; | |
198 | } | |
199 | sdp->sd_glockd_process[sdp->sd_glockd_num] = p; | |
200 | } | |
201 | ||
202 | error = gfs2_glock_nq_num(sdp, | |
203 | GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, | |
204 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE, | |
205 | mount_gh); | |
206 | if (error) { | |
207 | fs_err(sdp, "can't acquire mount glock: %d\n", error); | |
208 | goto fail; | |
209 | } | |
210 | ||
211 | error = gfs2_glock_nq_num(sdp, | |
212 | GFS2_LIVE_LOCK, &gfs2_nondisk_glops, | |
213 | LM_ST_SHARED, | |
579b78a4 | 214 | LM_FLAG_NOEXP | GL_EXACT, |
b3b94faa DT |
215 | &sdp->sd_live_gh); |
216 | if (error) { | |
217 | fs_err(sdp, "can't acquire live glock: %d\n", error); | |
218 | goto fail_mount; | |
219 | } | |
220 | ||
221 | error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, | |
222 | CREATE, &sdp->sd_rename_gl); | |
223 | if (error) { | |
224 | fs_err(sdp, "can't create rename glock: %d\n", error); | |
225 | goto fail_live; | |
226 | } | |
227 | ||
228 | error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops, | |
229 | CREATE, &sdp->sd_trans_gl); | |
230 | if (error) { | |
231 | fs_err(sdp, "can't create transaction glock: %d\n", error); | |
232 | goto fail_rename; | |
233 | } | |
234 | set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags); | |
235 | ||
236 | return 0; | |
237 | ||
feaa7bba | 238 | fail_trans: |
b3b94faa | 239 | gfs2_glock_put(sdp->sd_trans_gl); |
feaa7bba | 240 | fail_rename: |
b3b94faa | 241 | gfs2_glock_put(sdp->sd_rename_gl); |
feaa7bba | 242 | fail_live: |
b3b94faa | 243 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
feaa7bba | 244 | fail_mount: |
b3b94faa | 245 | gfs2_glock_dq_uninit(mount_gh); |
feaa7bba | 246 | fail: |
b3b94faa DT |
247 | while (sdp->sd_glockd_num--) |
248 | kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]); | |
249 | ||
250 | kthread_stop(sdp->sd_scand_process); | |
b3b94faa DT |
251 | return error; |
252 | } | |
253 | ||
feaa7bba SW |
254 | static struct inode *gfs2_lookup_root(struct super_block *sb, |
255 | struct gfs2_inum *inum) | |
f42faf4f | 256 | { |
feaa7bba | 257 | return gfs2_inode_lookup(sb, inum, DT_DIR); |
f42faf4f SW |
258 | } |
259 | ||
b3b94faa DT |
260 | static int init_sb(struct gfs2_sbd *sdp, int silent, int undo) |
261 | { | |
262 | struct super_block *sb = sdp->sd_vfs; | |
263 | struct gfs2_holder sb_gh; | |
419c93e0 | 264 | struct gfs2_inum *inum; |
f42faf4f | 265 | struct inode *inode; |
b3b94faa DT |
266 | int error = 0; |
267 | ||
268 | if (undo) { | |
88721877 RC |
269 | if (sb->s_root) { |
270 | dput(sb->s_root); | |
271 | sb->s_root = NULL; | |
272 | } | |
b3b94faa DT |
273 | return 0; |
274 | } | |
275 | ||
feaa7bba | 276 | error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, |
b3b94faa DT |
277 | LM_ST_SHARED, 0, &sb_gh); |
278 | if (error) { | |
279 | fs_err(sdp, "can't acquire superblock glock: %d\n", error); | |
280 | return error; | |
281 | } | |
282 | ||
283 | error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent); | |
284 | if (error) { | |
285 | fs_err(sdp, "can't read superblock: %d\n", error); | |
286 | goto out; | |
287 | } | |
288 | ||
289 | /* Set up the buffer cache and SB for real */ | |
b3b94faa | 290 | if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) { |
419c93e0 | 291 | error = -EINVAL; |
b3b94faa DT |
292 | fs_err(sdp, "FS block size (%u) is too small for device " |
293 | "block size (%u)\n", | |
294 | sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev)); | |
295 | goto out; | |
296 | } | |
297 | if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { | |
419c93e0 | 298 | error = -EINVAL; |
b3b94faa DT |
299 | fs_err(sdp, "FS block size (%u) is too big for machine " |
300 | "page size (%u)\n", | |
301 | sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); | |
302 | goto out; | |
303 | } | |
b3b94faa DT |
304 | sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); |
305 | ||
f42faf4f | 306 | /* Get the root inode */ |
419c93e0 SW |
307 | inum = &sdp->sd_sb.sb_root_dir; |
308 | if (sb->s_type == &gfs2meta_fs_type) | |
309 | inum = &sdp->sd_sb.sb_master_dir; | |
feaa7bba | 310 | inode = gfs2_lookup_root(sb, inum); |
c9fd4307 SW |
311 | if (IS_ERR(inode)) { |
312 | error = PTR_ERR(inode); | |
f42faf4f SW |
313 | fs_err(sdp, "can't read in root inode: %d\n", error); |
314 | goto out; | |
315 | } | |
b3b94faa | 316 | |
f42faf4f SW |
317 | sb->s_root = d_alloc_root(inode); |
318 | if (!sb->s_root) { | |
319 | fs_err(sdp, "can't get root dentry\n"); | |
320 | error = -ENOMEM; | |
c9fd4307 | 321 | iput(inode); |
f42faf4f | 322 | } |
5bb76af1 | 323 | sb->s_root->d_op = &gfs2_dops; |
f42faf4f | 324 | out: |
b3b94faa | 325 | gfs2_glock_dq_uninit(&sb_gh); |
b3b94faa DT |
326 | return error; |
327 | } | |
328 | ||
329 | static int init_journal(struct gfs2_sbd *sdp, int undo) | |
330 | { | |
331 | struct gfs2_holder ji_gh; | |
332 | struct task_struct *p; | |
5c676f6d | 333 | struct gfs2_inode *ip; |
b3b94faa DT |
334 | int jindex = 1; |
335 | int error = 0; | |
336 | ||
337 | if (undo) { | |
338 | jindex = 0; | |
339 | goto fail_recoverd; | |
340 | } | |
341 | ||
c752666c SW |
342 | sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex"); |
343 | if (IS_ERR(sdp->sd_jindex)) { | |
b3b94faa | 344 | fs_err(sdp, "can't lookup journal index: %d\n", error); |
c752666c | 345 | return PTR_ERR(sdp->sd_jindex); |
b3b94faa | 346 | } |
feaa7bba | 347 | ip = GFS2_I(sdp->sd_jindex); |
5c676f6d | 348 | set_bit(GLF_STICKY, &ip->i_gl->gl_flags); |
b3b94faa DT |
349 | |
350 | /* Load in the journal index special file */ | |
351 | ||
352 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
353 | if (error) { | |
354 | fs_err(sdp, "can't read journal index: %d\n", error); | |
355 | goto fail; | |
356 | } | |
357 | ||
358 | error = -EINVAL; | |
359 | if (!gfs2_jindex_size(sdp)) { | |
360 | fs_err(sdp, "no journals!\n"); | |
361 | goto fail_jindex; | |
362 | } | |
363 | ||
364 | if (sdp->sd_args.ar_spectator) { | |
365 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); | |
366 | sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks; | |
367 | } else { | |
368 | if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { | |
369 | fs_err(sdp, "can't mount journal #%u\n", | |
370 | sdp->sd_lockstruct.ls_jid); | |
371 | fs_err(sdp, "there are only %u journals (0 - %u)\n", | |
372 | gfs2_jindex_size(sdp), | |
373 | gfs2_jindex_size(sdp) - 1); | |
374 | goto fail_jindex; | |
375 | } | |
376 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); | |
377 | ||
feaa7bba | 378 | error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, |
b3b94faa DT |
379 | &gfs2_journal_glops, |
380 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP, | |
381 | &sdp->sd_journal_gh); | |
382 | if (error) { | |
383 | fs_err(sdp, "can't acquire journal glock: %d\n", error); | |
384 | goto fail_jindex; | |
385 | } | |
386 | ||
feaa7bba SW |
387 | ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
388 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, | |
b3b94faa DT |
389 | LM_FLAG_NOEXP | GL_EXACT, |
390 | &sdp->sd_jinode_gh); | |
391 | if (error) { | |
392 | fs_err(sdp, "can't acquire journal inode glock: %d\n", | |
393 | error); | |
394 | goto fail_journal_gh; | |
395 | } | |
396 | ||
397 | error = gfs2_jdesc_check(sdp->sd_jdesc); | |
398 | if (error) { | |
399 | fs_err(sdp, "my journal (%u) is bad: %d\n", | |
400 | sdp->sd_jdesc->jd_jid, error); | |
401 | goto fail_jinode_gh; | |
402 | } | |
403 | sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks; | |
404 | } | |
405 | ||
406 | if (sdp->sd_lockstruct.ls_first) { | |
407 | unsigned int x; | |
408 | for (x = 0; x < sdp->sd_journals; x++) { | |
c63e31c2 | 409 | error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x)); |
b3b94faa DT |
410 | if (error) { |
411 | fs_err(sdp, "error recovering journal %u: %d\n", | |
412 | x, error); | |
413 | goto fail_jinode_gh; | |
414 | } | |
415 | } | |
416 | ||
417 | gfs2_lm_others_may_mount(sdp); | |
418 | } else if (!sdp->sd_args.ar_spectator) { | |
c63e31c2 | 419 | error = gfs2_recover_journal(sdp->sd_jdesc); |
b3b94faa DT |
420 | if (error) { |
421 | fs_err(sdp, "error recovering my journal: %d\n", error); | |
422 | goto fail_jinode_gh; | |
423 | } | |
424 | } | |
425 | ||
426 | set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); | |
427 | gfs2_glock_dq_uninit(&ji_gh); | |
428 | jindex = 0; | |
429 | ||
b3b94faa DT |
430 | p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd"); |
431 | error = IS_ERR(p); | |
432 | if (error) { | |
433 | fs_err(sdp, "can't start recoverd thread: %d\n", error); | |
434 | goto fail_jinode_gh; | |
435 | } | |
436 | sdp->sd_recoverd_process = p; | |
437 | ||
438 | return 0; | |
439 | ||
a91ea69f | 440 | fail_recoverd: |
b3b94faa | 441 | kthread_stop(sdp->sd_recoverd_process); |
a91ea69f | 442 | fail_jinode_gh: |
b3b94faa DT |
443 | if (!sdp->sd_args.ar_spectator) |
444 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
a91ea69f | 445 | fail_journal_gh: |
b3b94faa DT |
446 | if (!sdp->sd_args.ar_spectator) |
447 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
a91ea69f | 448 | fail_jindex: |
b3b94faa DT |
449 | gfs2_jindex_free(sdp); |
450 | if (jindex) | |
451 | gfs2_glock_dq_uninit(&ji_gh); | |
a91ea69f | 452 | fail: |
f42faf4f | 453 | iput(sdp->sd_jindex); |
b3b94faa DT |
454 | return error; |
455 | } | |
456 | ||
b3b94faa DT |
457 | |
458 | static int init_inodes(struct gfs2_sbd *sdp, int undo) | |
459 | { | |
b3b94faa | 460 | int error = 0; |
5c676f6d | 461 | struct gfs2_inode *ip; |
c9fd4307 | 462 | struct inode *inode; |
b3b94faa DT |
463 | |
464 | if (undo) | |
f42faf4f SW |
465 | goto fail_qinode; |
466 | ||
feaa7bba | 467 | inode = gfs2_lookup_root(sdp->sd_vfs, &sdp->sd_sb.sb_master_dir); |
c9fd4307 SW |
468 | if (IS_ERR(inode)) { |
469 | error = PTR_ERR(inode); | |
f42faf4f SW |
470 | fs_err(sdp, "can't read in master directory: %d\n", error); |
471 | goto fail; | |
472 | } | |
c9fd4307 | 473 | sdp->sd_master_dir = inode; |
f42faf4f SW |
474 | |
475 | error = init_journal(sdp, undo); | |
476 | if (error) | |
477 | goto fail_master; | |
b3b94faa DT |
478 | |
479 | /* Read in the master inode number inode */ | |
c752666c SW |
480 | sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum"); |
481 | if (IS_ERR(sdp->sd_inum_inode)) { | |
482 | error = PTR_ERR(sdp->sd_inum_inode); | |
b3b94faa | 483 | fs_err(sdp, "can't read in inum inode: %d\n", error); |
f42faf4f | 484 | goto fail_journal; |
b3b94faa DT |
485 | } |
486 | ||
f42faf4f | 487 | |
b3b94faa | 488 | /* Read in the master statfs inode */ |
c752666c SW |
489 | sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs"); |
490 | if (IS_ERR(sdp->sd_statfs_inode)) { | |
491 | error = PTR_ERR(sdp->sd_statfs_inode); | |
b3b94faa | 492 | fs_err(sdp, "can't read in statfs inode: %d\n", error); |
f42faf4f | 493 | goto fail_inum; |
b3b94faa DT |
494 | } |
495 | ||
496 | /* Read in the resource index inode */ | |
c752666c SW |
497 | sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex"); |
498 | if (IS_ERR(sdp->sd_rindex)) { | |
499 | error = PTR_ERR(sdp->sd_rindex); | |
b3b94faa DT |
500 | fs_err(sdp, "can't get resource index inode: %d\n", error); |
501 | goto fail_statfs; | |
502 | } | |
feaa7bba | 503 | ip = GFS2_I(sdp->sd_rindex); |
5c676f6d SW |
504 | set_bit(GLF_STICKY, &ip->i_gl->gl_flags); |
505 | sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1; | |
b3b94faa DT |
506 | |
507 | /* Read in the quota inode */ | |
c752666c SW |
508 | sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota"); |
509 | if (IS_ERR(sdp->sd_quota_inode)) { | |
510 | error = PTR_ERR(sdp->sd_quota_inode); | |
b3b94faa DT |
511 | fs_err(sdp, "can't get quota file inode: %d\n", error); |
512 | goto fail_rindex; | |
513 | } | |
b3b94faa DT |
514 | return 0; |
515 | ||
f42faf4f SW |
516 | fail_qinode: |
517 | iput(sdp->sd_quota_inode); | |
f42faf4f | 518 | fail_rindex: |
b3b94faa | 519 | gfs2_clear_rgrpd(sdp); |
f42faf4f | 520 | iput(sdp->sd_rindex); |
f42faf4f SW |
521 | fail_statfs: |
522 | iput(sdp->sd_statfs_inode); | |
f42faf4f SW |
523 | fail_inum: |
524 | iput(sdp->sd_inum_inode); | |
525 | fail_journal: | |
526 | init_journal(sdp, UNDO); | |
527 | fail_master: | |
528 | iput(sdp->sd_master_dir); | |
529 | fail: | |
b3b94faa DT |
530 | return error; |
531 | } | |
532 | ||
533 | static int init_per_node(struct gfs2_sbd *sdp, int undo) | |
534 | { | |
f42faf4f | 535 | struct inode *pn = NULL; |
b3b94faa DT |
536 | char buf[30]; |
537 | int error = 0; | |
5c676f6d | 538 | struct gfs2_inode *ip; |
b3b94faa DT |
539 | |
540 | if (sdp->sd_args.ar_spectator) | |
541 | return 0; | |
542 | ||
543 | if (undo) | |
544 | goto fail_qc_gh; | |
545 | ||
c752666c SW |
546 | pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node"); |
547 | if (IS_ERR(pn)) { | |
548 | error = PTR_ERR(pn); | |
b3b94faa DT |
549 | fs_err(sdp, "can't find per_node directory: %d\n", error); |
550 | return error; | |
551 | } | |
552 | ||
553 | sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid); | |
c752666c SW |
554 | sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf); |
555 | if (IS_ERR(sdp->sd_ir_inode)) { | |
556 | error = PTR_ERR(sdp->sd_ir_inode); | |
b3b94faa DT |
557 | fs_err(sdp, "can't find local \"ir\" file: %d\n", error); |
558 | goto fail; | |
559 | } | |
560 | ||
561 | sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid); | |
c752666c SW |
562 | sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf); |
563 | if (IS_ERR(sdp->sd_sc_inode)) { | |
564 | error = PTR_ERR(sdp->sd_sc_inode); | |
b3b94faa DT |
565 | fs_err(sdp, "can't find local \"sc\" file: %d\n", error); |
566 | goto fail_ir_i; | |
567 | } | |
568 | ||
b3b94faa | 569 | sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
570 | sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf); |
571 | if (IS_ERR(sdp->sd_qc_inode)) { | |
572 | error = PTR_ERR(sdp->sd_qc_inode); | |
b3b94faa DT |
573 | fs_err(sdp, "can't find local \"qc\" file: %d\n", error); |
574 | goto fail_ut_i; | |
575 | } | |
576 | ||
f42faf4f | 577 | iput(pn); |
b3b94faa DT |
578 | pn = NULL; |
579 | ||
feaa7bba | 580 | ip = GFS2_I(sdp->sd_ir_inode); |
5c676f6d | 581 | error = gfs2_glock_nq_init(ip->i_gl, |
579b78a4 | 582 | LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
583 | &sdp->sd_ir_gh); |
584 | if (error) { | |
585 | fs_err(sdp, "can't lock local \"ir\" file: %d\n", error); | |
586 | goto fail_qc_i; | |
587 | } | |
588 | ||
feaa7bba | 589 | ip = GFS2_I(sdp->sd_sc_inode); |
5c676f6d | 590 | error = gfs2_glock_nq_init(ip->i_gl, |
579b78a4 | 591 | LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
592 | &sdp->sd_sc_gh); |
593 | if (error) { | |
594 | fs_err(sdp, "can't lock local \"sc\" file: %d\n", error); | |
595 | goto fail_ir_gh; | |
596 | } | |
597 | ||
feaa7bba | 598 | ip = GFS2_I(sdp->sd_qc_inode); |
5c676f6d | 599 | error = gfs2_glock_nq_init(ip->i_gl, |
579b78a4 | 600 | LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
601 | &sdp->sd_qc_gh); |
602 | if (error) { | |
603 | fs_err(sdp, "can't lock local \"qc\" file: %d\n", error); | |
604 | goto fail_ut_gh; | |
605 | } | |
606 | ||
607 | return 0; | |
608 | ||
a91ea69f | 609 | fail_qc_gh: |
b3b94faa | 610 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
a91ea69f | 611 | fail_ut_gh: |
b3b94faa | 612 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
a91ea69f | 613 | fail_ir_gh: |
b3b94faa | 614 | gfs2_glock_dq_uninit(&sdp->sd_ir_gh); |
a91ea69f | 615 | fail_qc_i: |
f42faf4f | 616 | iput(sdp->sd_qc_inode); |
a91ea69f | 617 | fail_ut_i: |
f42faf4f | 618 | iput(sdp->sd_sc_inode); |
a91ea69f | 619 | fail_ir_i: |
f42faf4f | 620 | iput(sdp->sd_ir_inode); |
a91ea69f | 621 | fail: |
b3b94faa | 622 | if (pn) |
f42faf4f | 623 | iput(pn); |
b3b94faa DT |
624 | return error; |
625 | } | |
626 | ||
627 | static int init_threads(struct gfs2_sbd *sdp, int undo) | |
628 | { | |
629 | struct task_struct *p; | |
630 | int error = 0; | |
631 | ||
632 | if (undo) | |
feaa7bba | 633 | goto fail_quotad; |
b3b94faa DT |
634 | |
635 | sdp->sd_log_flush_time = jiffies; | |
636 | sdp->sd_jindex_refresh_time = jiffies; | |
637 | ||
638 | p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); | |
639 | error = IS_ERR(p); | |
640 | if (error) { | |
641 | fs_err(sdp, "can't start logd thread: %d\n", error); | |
642 | return error; | |
643 | } | |
644 | sdp->sd_logd_process = p; | |
645 | ||
646 | sdp->sd_statfs_sync_time = jiffies; | |
647 | sdp->sd_quota_sync_time = jiffies; | |
648 | ||
649 | p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad"); | |
650 | error = IS_ERR(p); | |
651 | if (error) { | |
652 | fs_err(sdp, "can't start quotad thread: %d\n", error); | |
653 | goto fail; | |
654 | } | |
655 | sdp->sd_quotad_process = p; | |
656 | ||
b3b94faa DT |
657 | return 0; |
658 | ||
b3b94faa | 659 | |
feaa7bba | 660 | fail_quotad: |
b3b94faa | 661 | kthread_stop(sdp->sd_quotad_process); |
feaa7bba | 662 | fail: |
b3b94faa | 663 | kthread_stop(sdp->sd_logd_process); |
b3b94faa DT |
664 | return error; |
665 | } | |
666 | ||
667 | /** | |
668 | * fill_super - Read in superblock | |
669 | * @sb: The VFS superblock | |
670 | * @data: Mount options | |
671 | * @silent: Don't complain if it's not a GFS2 filesystem | |
672 | * | |
673 | * Returns: errno | |
674 | */ | |
675 | ||
676 | static int fill_super(struct super_block *sb, void *data, int silent) | |
677 | { | |
678 | struct gfs2_sbd *sdp; | |
679 | struct gfs2_holder mount_gh; | |
680 | int error; | |
681 | ||
682 | sdp = init_sbd(sb); | |
683 | if (!sdp) { | |
d92a8d48 | 684 | printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n"); |
b3b94faa DT |
685 | return -ENOMEM; |
686 | } | |
687 | ||
688 | error = gfs2_mount_args(sdp, (char *)data, 0); | |
689 | if (error) { | |
d92a8d48 | 690 | printk(KERN_WARNING "GFS2: can't parse mount arguments\n"); |
b3b94faa DT |
691 | goto fail; |
692 | } | |
693 | ||
419c93e0 SW |
694 | init_vfs(sb, SDF_NOATIME); |
695 | ||
696 | /* Set up the buffer cache and fill in some fake block size values | |
697 | to allow us to read-in the on-disk superblock. */ | |
698 | sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK); | |
699 | sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; | |
700 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
701 | GFS2_BASIC_BLOCK_SHIFT; | |
702 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
b3b94faa DT |
703 | |
704 | error = init_names(sdp, silent); | |
705 | if (error) | |
706 | goto fail; | |
707 | ||
708 | error = gfs2_sys_fs_add(sdp); | |
709 | if (error) | |
710 | goto fail; | |
711 | ||
712 | error = gfs2_lm_mount(sdp, silent); | |
713 | if (error) | |
714 | goto fail_sys; | |
715 | ||
716 | error = init_locking(sdp, &mount_gh, DO); | |
717 | if (error) | |
718 | goto fail_lm; | |
719 | ||
720 | error = init_sb(sdp, silent, DO); | |
721 | if (error) | |
722 | goto fail_locking; | |
b3b94faa DT |
723 | |
724 | error = init_inodes(sdp, DO); | |
725 | if (error) | |
f42faf4f | 726 | goto fail_sb; |
b3b94faa DT |
727 | |
728 | error = init_per_node(sdp, DO); | |
729 | if (error) | |
730 | goto fail_inodes; | |
731 | ||
732 | error = gfs2_statfs_init(sdp); | |
733 | if (error) { | |
734 | fs_err(sdp, "can't initialize statfs subsystem: %d\n", error); | |
735 | goto fail_per_node; | |
736 | } | |
737 | ||
738 | error = init_threads(sdp, DO); | |
739 | if (error) | |
740 | goto fail_per_node; | |
741 | ||
742 | if (!(sb->s_flags & MS_RDONLY)) { | |
743 | error = gfs2_make_fs_rw(sdp); | |
744 | if (error) { | |
745 | fs_err(sdp, "can't make FS RW: %d\n", error); | |
746 | goto fail_threads; | |
747 | } | |
748 | } | |
749 | ||
750 | gfs2_glock_dq_uninit(&mount_gh); | |
751 | ||
752 | return 0; | |
753 | ||
a91ea69f | 754 | fail_threads: |
b3b94faa | 755 | init_threads(sdp, UNDO); |
a91ea69f | 756 | fail_per_node: |
b3b94faa | 757 | init_per_node(sdp, UNDO); |
a91ea69f | 758 | fail_inodes: |
b3b94faa | 759 | init_inodes(sdp, UNDO); |
a91ea69f | 760 | fail_sb: |
b3b94faa | 761 | init_sb(sdp, 0, UNDO); |
a91ea69f | 762 | fail_locking: |
b3b94faa | 763 | init_locking(sdp, &mount_gh, UNDO); |
a91ea69f | 764 | fail_lm: |
b3b94faa DT |
765 | gfs2_gl_hash_clear(sdp, WAIT); |
766 | gfs2_lm_unmount(sdp); | |
767 | while (invalidate_inodes(sb)) | |
768 | yield(); | |
a91ea69f | 769 | fail_sys: |
b3b94faa | 770 | gfs2_sys_fs_del(sdp); |
a91ea69f | 771 | fail: |
b3b94faa | 772 | vfree(sdp); |
5c676f6d | 773 | sb->s_fs_info = NULL; |
b3b94faa DT |
774 | return error; |
775 | } | |
776 | ||
ccd6efd0 AM |
777 | static int gfs2_get_sb(struct file_system_type *fs_type, int flags, |
778 | const char *dev_name, void *data, struct vfsmount *mnt) | |
b3b94faa | 779 | { |
86384605 AD |
780 | struct super_block *sb; |
781 | struct gfs2_sbd *sdp; | |
782 | int error = get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt); | |
783 | if (error) | |
784 | goto out; | |
785 | sb = mnt->mnt_sb; | |
26c1a574 | 786 | sdp = sb->s_fs_info; |
86384605 AD |
787 | sdp->sd_gfs2mnt = mnt; |
788 | out: | |
789 | return error; | |
790 | } | |
791 | ||
792 | static int fill_super_meta(struct super_block *sb, struct super_block *new, | |
793 | void *data, int silent) | |
794 | { | |
795 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
796 | struct inode *inode; | |
797 | int error = 0; | |
798 | ||
799 | new->s_fs_info = sdp; | |
800 | sdp->sd_vfs_meta = sb; | |
801 | ||
802 | init_vfs(new, SDF_NOATIME); | |
803 | ||
804 | /* Get the master inode */ | |
805 | inode = igrab(sdp->sd_master_dir); | |
806 | ||
807 | new->s_root = d_alloc_root(inode); | |
808 | if (!new->s_root) { | |
809 | fs_err(sdp, "can't get root dentry\n"); | |
810 | error = -ENOMEM; | |
811 | iput(inode); | |
812 | } | |
813 | new->s_root->d_op = &gfs2_dops; | |
814 | ||
815 | return error; | |
816 | } | |
a91ea69f | 817 | |
86384605 AD |
818 | static int set_bdev_super(struct super_block *s, void *data) |
819 | { | |
820 | s->s_bdev = data; | |
821 | s->s_dev = s->s_bdev->bd_dev; | |
822 | return 0; | |
823 | } | |
824 | ||
825 | static int test_bdev_super(struct super_block *s, void *data) | |
826 | { | |
26c1a574 | 827 | return s->s_bdev == data; |
86384605 AD |
828 | } |
829 | ||
830 | static struct super_block* get_gfs2_sb(const char *dev_name) | |
831 | { | |
832 | struct kstat stat; | |
833 | struct nameidata nd; | |
834 | struct file_system_type *fstype; | |
835 | struct super_block *sb = NULL, *s; | |
836 | struct list_head *l; | |
837 | int error; | |
838 | ||
839 | error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd); | |
840 | if (error) { | |
841 | printk(KERN_WARNING "GFS2: path_lookup on %s returned error\n", | |
842 | dev_name); | |
843 | goto out; | |
844 | } | |
845 | error = vfs_getattr(nd.mnt, nd.dentry, &stat); | |
846 | ||
847 | fstype = get_fs_type("gfs2"); | |
848 | list_for_each(l, &fstype->fs_supers) { | |
849 | s = list_entry(l, struct super_block, s_instances); | |
850 | if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) || | |
851 | (S_ISDIR(stat.mode) && s == nd.dentry->d_inode->i_sb)) { | |
852 | sb = s; | |
853 | goto free_nd; | |
854 | } | |
855 | } | |
856 | ||
857 | printk(KERN_WARNING "GFS2: Unrecognized block device or " | |
858 | "mount point %s", dev_name); | |
859 | ||
860 | free_nd: | |
861 | path_release(&nd); | |
862 | out: | |
863 | return sb; | |
864 | } | |
865 | ||
866 | static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags, | |
867 | const char *dev_name, void *data, struct vfsmount *mnt) | |
868 | { | |
869 | int error = 0; | |
870 | struct super_block *sb = NULL, *new; | |
871 | struct gfs2_sbd *sdp; | |
872 | char *gfs2mnt = NULL; | |
873 | ||
874 | sb = get_gfs2_sb(dev_name); | |
875 | if (!sb) { | |
876 | printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n"); | |
877 | error = -ENOENT; | |
878 | goto error; | |
879 | } | |
880 | sdp = (struct gfs2_sbd*) sb->s_fs_info; | |
881 | if (sdp->sd_vfs_meta) { | |
882 | printk(KERN_WARNING "GFS2: gfs2meta mount already exists\n"); | |
883 | error = -EBUSY; | |
884 | goto error; | |
885 | } | |
886 | mutex_lock(&sb->s_bdev->bd_mount_mutex); | |
887 | new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev); | |
888 | mutex_unlock(&sb->s_bdev->bd_mount_mutex); | |
889 | if (IS_ERR(new)) { | |
890 | error = PTR_ERR(new); | |
891 | goto error; | |
892 | } | |
893 | module_put(fs_type->owner); | |
894 | new->s_flags = flags; | |
895 | strlcpy(new->s_id, sb->s_id, sizeof(new->s_id)); | |
896 | sb_set_blocksize(new, sb->s_blocksize); | |
897 | error = fill_super_meta(sb, new, data, flags & MS_SILENT ? 1 : 0); | |
898 | if (error) { | |
899 | up_write(&new->s_umount); | |
900 | deactivate_super(new); | |
901 | goto error; | |
902 | } | |
903 | ||
904 | new->s_flags |= MS_ACTIVE; | |
905 | ||
906 | /* Grab a reference to the gfs2 mount point */ | |
907 | atomic_inc(&sdp->sd_gfs2mnt->mnt_count); | |
908 | return simple_set_mnt(mnt, new); | |
909 | error: | |
910 | if (gfs2mnt) | |
911 | kfree(gfs2mnt); | |
912 | return error; | |
b3b94faa DT |
913 | } |
914 | ||
419c93e0 SW |
915 | static void gfs2_kill_sb(struct super_block *sb) |
916 | { | |
917 | kill_block_super(sb); | |
918 | } | |
919 | ||
86384605 AD |
920 | static void gfs2_kill_sb_meta(struct super_block *sb) |
921 | { | |
922 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
923 | generic_shutdown_super(sb); | |
924 | sdp->sd_vfs_meta = NULL; | |
925 | atomic_dec(&sdp->sd_gfs2mnt->mnt_count); | |
926 | } | |
927 | ||
b3b94faa DT |
928 | struct file_system_type gfs2_fs_type = { |
929 | .name = "gfs2", | |
930 | .fs_flags = FS_REQUIRES_DEV, | |
931 | .get_sb = gfs2_get_sb, | |
419c93e0 SW |
932 | .kill_sb = gfs2_kill_sb, |
933 | .owner = THIS_MODULE, | |
934 | }; | |
935 | ||
936 | struct file_system_type gfs2meta_fs_type = { | |
937 | .name = "gfs2meta", | |
938 | .fs_flags = FS_REQUIRES_DEV, | |
86384605 AD |
939 | .get_sb = gfs2_get_sb_meta, |
940 | .kill_sb = gfs2_kill_sb_meta, | |
b3b94faa DT |
941 | .owner = THIS_MODULE, |
942 | }; | |
943 |