[GFS2] The core of GFS2
[linux-2.6.git] / fs / gfs2 / ops_fstype.c
1 /*
2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3  * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
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
7  * of the GNU General Public License v.2.
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/vmalloc.h>
16 #include <linux/blkdev.h>
17 #include <linux/kthread.h>
18 #include <asm/semaphore.h>
19
20 #include "gfs2.h"
21 #include "daemon.h"
22 #include "glock.h"
23 #include "glops.h"
24 #include "inode.h"
25 #include "lm.h"
26 #include "mount.h"
27 #include "ops_export.h"
28 #include "ops_fstype.h"
29 #include "ops_super.h"
30 #include "recovery.h"
31 #include "rgrp.h"
32 #include "super.h"
33 #include "unlinked.h"
34 #include "sys.h"
35
36 #define DO 0
37 #define UNDO 1
38
39 static struct gfs2_sbd *init_sbd(struct super_block *sb)
40 {
41         struct gfs2_sbd *sdp;
42         unsigned int x;
43
44         sdp = vmalloc(sizeof(struct gfs2_sbd));
45         if (!sdp)
46                 return NULL;
47
48         memset(sdp, 0, sizeof(struct gfs2_sbd));
49
50         set_v2sdp(sb, sdp);
51         sdp->sd_vfs = sb;
52
53         gfs2_tune_init(&sdp->sd_tune);
54
55         for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
56                 sdp->sd_gl_hash[x].hb_lock = RW_LOCK_UNLOCKED;
57                 INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
58         }
59         INIT_LIST_HEAD(&sdp->sd_reclaim_list);
60         spin_lock_init(&sdp->sd_reclaim_lock);
61         init_waitqueue_head(&sdp->sd_reclaim_wq);
62         init_MUTEX(&sdp->sd_invalidate_inodes_mutex);
63
64         init_MUTEX(&sdp->sd_inum_mutex);
65         spin_lock_init(&sdp->sd_statfs_spin);
66         init_MUTEX(&sdp->sd_statfs_mutex);
67
68         spin_lock_init(&sdp->sd_rindex_spin);
69         init_MUTEX(&sdp->sd_rindex_mutex);
70         INIT_LIST_HEAD(&sdp->sd_rindex_list);
71         INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
72         INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
73
74         INIT_LIST_HEAD(&sdp->sd_jindex_list);
75         spin_lock_init(&sdp->sd_jindex_spin);
76         init_MUTEX(&sdp->sd_jindex_mutex);
77
78         INIT_LIST_HEAD(&sdp->sd_unlinked_list);
79         spin_lock_init(&sdp->sd_unlinked_spin);
80         init_MUTEX(&sdp->sd_unlinked_mutex);
81
82         INIT_LIST_HEAD(&sdp->sd_quota_list);
83         spin_lock_init(&sdp->sd_quota_spin);
84         init_MUTEX(&sdp->sd_quota_mutex);
85
86         spin_lock_init(&sdp->sd_log_lock);
87         init_waitqueue_head(&sdp->sd_log_trans_wq);
88         init_waitqueue_head(&sdp->sd_log_flush_wq);
89
90         INIT_LIST_HEAD(&sdp->sd_log_le_gl);
91         INIT_LIST_HEAD(&sdp->sd_log_le_buf);
92         INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
93         INIT_LIST_HEAD(&sdp->sd_log_le_rg);
94         INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
95
96         INIT_LIST_HEAD(&sdp->sd_log_blks_list);
97         init_waitqueue_head(&sdp->sd_log_blks_wait);
98
99         INIT_LIST_HEAD(&sdp->sd_ail1_list);
100         INIT_LIST_HEAD(&sdp->sd_ail2_list);
101
102         init_MUTEX(&sdp->sd_log_flush_lock);
103         INIT_LIST_HEAD(&sdp->sd_log_flush_list);
104
105         INIT_LIST_HEAD(&sdp->sd_revoke_list);
106
107         init_MUTEX(&sdp->sd_freeze_lock);
108
109         return sdp;
110 }
111
112 static void init_vfs(struct gfs2_sbd *sdp)
113 {
114         struct super_block *sb = sdp->sd_vfs;
115
116         sb->s_magic = GFS2_MAGIC;
117         sb->s_op = &gfs2_super_ops;
118         sb->s_export_op = &gfs2_export_ops;
119         sb->s_maxbytes = MAX_LFS_FILESIZE;
120
121         if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
122                 set_bit(SDF_NOATIME, &sdp->sd_flags);
123
124         /* Don't let the VFS update atimes.  GFS2 handles this itself. */
125         sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
126
127         /* Set up the buffer cache and fill in some fake block size values
128            to allow us to read-in the on-disk superblock. */
129         sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
130         sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
131         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT;
132         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
133 }
134
135 static int init_names(struct gfs2_sbd *sdp, int silent)
136 {
137         struct gfs2_sb *sb = NULL;
138         char *proto, *table;
139         int error = 0;
140
141         proto = sdp->sd_args.ar_lockproto;
142         table = sdp->sd_args.ar_locktable;
143
144         /*  Try to autodetect  */
145
146         if (!proto[0] || !table[0]) {
147                 struct buffer_head *bh;
148                 bh = sb_getblk(sdp->sd_vfs,
149                                GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
150                 lock_buffer(bh);
151                 clear_buffer_uptodate(bh);
152                 clear_buffer_dirty(bh);
153                 unlock_buffer(bh);
154                 ll_rw_block(READ, 1, &bh);
155                 wait_on_buffer(bh);
156
157                 if (!buffer_uptodate(bh)) {
158                         brelse(bh);
159                         return -EIO;
160                 }
161
162                 sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
163                 if (!sb) {
164                         brelse(bh);
165                         return -ENOMEM;
166                 }
167                 gfs2_sb_in(sb, bh->b_data); 
168                 brelse(bh);
169
170                 error = gfs2_check_sb(sdp, sb, silent);
171                 if (error)
172                         goto out;
173
174                 if (!proto[0])
175                         proto = sb->sb_lockproto;
176                 if (!table[0])
177                         table = sb->sb_locktable;
178         }
179
180         if (!table[0])
181                 table = sdp->sd_vfs->s_id;
182
183         snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
184         snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
185
186  out:
187         kfree(sb);
188
189         return error;
190 }
191
192 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
193                         int undo)
194 {
195         struct task_struct *p;
196         int error = 0;
197
198         if (undo)
199                 goto fail_trans;
200
201         p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
202         error = IS_ERR(p);
203         if (error) {
204                 fs_err(sdp, "can't start scand thread: %d\n", error);
205                 return error;
206         }
207         sdp->sd_scand_process = p;
208
209         for (sdp->sd_glockd_num = 0;
210              sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
211              sdp->sd_glockd_num++) {
212                 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
213                 error = IS_ERR(p);
214                 if (error) {
215                         fs_err(sdp, "can't start glockd thread: %d\n", error);
216                         goto fail;
217                 }
218                 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
219         }
220
221         error = gfs2_glock_nq_num(sdp,
222                                   GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
223                                   LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
224                                   mount_gh);
225         if (error) {
226                 fs_err(sdp, "can't acquire mount glock: %d\n", error);
227                 goto fail;
228         }
229
230         error = gfs2_glock_nq_num(sdp,
231                                   GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
232                                   LM_ST_SHARED,
233                                   LM_FLAG_NOEXP | GL_EXACT | GL_NEVER_RECURSE,
234                                   &sdp->sd_live_gh);
235         if (error) {
236                 fs_err(sdp, "can't acquire live glock: %d\n", error);
237                 goto fail_mount;
238         }
239
240         error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
241                                CREATE, &sdp->sd_rename_gl);
242         if (error) {
243                 fs_err(sdp, "can't create rename glock: %d\n", error);
244                 goto fail_live;
245         }
246
247         error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
248                                CREATE, &sdp->sd_trans_gl);
249         if (error) {
250                 fs_err(sdp, "can't create transaction glock: %d\n", error);
251                 goto fail_rename;
252         }
253         set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
254
255         return 0;
256
257  fail_trans:
258         gfs2_glock_put(sdp->sd_trans_gl);
259
260  fail_rename:
261         gfs2_glock_put(sdp->sd_rename_gl);
262
263  fail_live:
264         gfs2_glock_dq_uninit(&sdp->sd_live_gh);
265
266  fail_mount:
267         gfs2_glock_dq_uninit(mount_gh);
268
269  fail:
270         while (sdp->sd_glockd_num--)
271                 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
272
273         kthread_stop(sdp->sd_scand_process);
274
275         return error;
276 }
277
278 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
279 {
280         struct super_block *sb = sdp->sd_vfs;
281         struct gfs2_holder sb_gh;
282         int error = 0;
283
284         if (undo) {
285                 gfs2_inode_put(sdp->sd_master_dir);
286                 return 0;
287         }
288         
289         error = gfs2_glock_nq_num(sdp,
290                                  GFS2_SB_LOCK, &gfs2_meta_glops,
291                                  LM_ST_SHARED, 0, &sb_gh);
292         if (error) {
293                 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
294                 return error;
295         }
296
297         error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
298         if (error) {
299                 fs_err(sdp, "can't read superblock: %d\n", error);
300                 goto out;
301         }
302
303         /* Set up the buffer cache and SB for real */
304         error = -EINVAL;
305         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
306                 fs_err(sdp, "FS block size (%u) is too small for device "
307                        "block size (%u)\n",
308                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
309                 goto out;
310         }
311         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
312                 fs_err(sdp, "FS block size (%u) is too big for machine "
313                        "page size (%u)\n",
314                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
315                 goto out;
316         }
317
318         /* Get rid of buffers from the original block size */
319         sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
320         sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
321
322         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
323
324         error = gfs2_lookup_master_dir(sdp);
325         if (error)
326                 fs_err(sdp, "can't read in master directory: %d\n", error);
327
328  out:
329         gfs2_glock_dq_uninit(&sb_gh);
330
331         return error;
332 }
333
334 static int init_journal(struct gfs2_sbd *sdp, int undo)
335 {
336         struct gfs2_holder ji_gh;
337         struct task_struct *p;
338         int jindex = 1;
339         int error = 0;
340
341         if (undo) {
342                 jindex = 0;
343                 goto fail_recoverd;
344         }
345
346         error = gfs2_lookup_simple(sdp->sd_master_dir, "jindex",
347                                    &sdp->sd_jindex);
348         if (error) {
349                 fs_err(sdp, "can't lookup journal index: %d\n", error);
350                 return error;
351         }
352         set_bit(GLF_STICKY, &sdp->sd_jindex->i_gl->gl_flags);
353
354         /* Load in the journal index special file */
355
356         error = gfs2_jindex_hold(sdp, &ji_gh);
357         if (error) {
358                 fs_err(sdp, "can't read journal index: %d\n", error);
359                 goto fail;
360         }
361
362         error = -EINVAL;
363         if (!gfs2_jindex_size(sdp)) {
364                 fs_err(sdp, "no journals!\n");
365                 goto fail_jindex;               
366         }
367
368         if (sdp->sd_args.ar_spectator) {
369                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
370                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
371         } else {
372                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
373                         fs_err(sdp, "can't mount journal #%u\n",
374                                sdp->sd_lockstruct.ls_jid);
375                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
376                                gfs2_jindex_size(sdp),
377                                gfs2_jindex_size(sdp) - 1);
378                         goto fail_jindex;
379                 }
380                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
381
382                 error = gfs2_glock_nq_num(sdp,
383                                           sdp->sd_lockstruct.ls_jid,
384                                           &gfs2_journal_glops,
385                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
386                                           &sdp->sd_journal_gh);
387                 if (error) {
388                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
389                         goto fail_jindex;
390                 }
391
392                 error = gfs2_glock_nq_init(sdp->sd_jdesc->jd_inode->i_gl,
393                                            LM_ST_SHARED,
394                                            LM_FLAG_NOEXP | GL_EXACT,
395                                            &sdp->sd_jinode_gh);
396                 if (error) {
397                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
398                                error);
399                         goto fail_journal_gh;
400                 }
401
402                 error = gfs2_jdesc_check(sdp->sd_jdesc);
403                 if (error) {
404                         fs_err(sdp, "my journal (%u) is bad: %d\n",
405                                sdp->sd_jdesc->jd_jid, error);
406                         goto fail_jinode_gh;
407                 }
408                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
409         }
410
411         if (sdp->sd_lockstruct.ls_first) {
412                 unsigned int x;
413                 for (x = 0; x < sdp->sd_journals; x++) {
414                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
415                                                      WAIT);
416                         if (error) {
417                                 fs_err(sdp, "error recovering journal %u: %d\n",
418                                        x, error);
419                                 goto fail_jinode_gh;
420                         }
421                 }
422
423                 gfs2_lm_others_may_mount(sdp);
424         } else if (!sdp->sd_args.ar_spectator) {
425                 error = gfs2_recover_journal(sdp->sd_jdesc, WAIT);
426                 if (error) {
427                         fs_err(sdp, "error recovering my journal: %d\n", error);
428                         goto fail_jinode_gh;
429                 }
430         }
431
432         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
433         gfs2_glock_dq_uninit(&ji_gh);
434         jindex = 0;
435
436         /* Disown my Journal glock */
437
438         sdp->sd_journal_gh.gh_owner = NULL;
439         sdp->sd_jinode_gh.gh_owner = NULL;
440
441         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
442         error = IS_ERR(p);
443         if (error) {
444                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
445                 goto fail_jinode_gh;
446         }
447         sdp->sd_recoverd_process = p;
448
449         return 0;
450
451  fail_recoverd:
452         kthread_stop(sdp->sd_recoverd_process);
453
454  fail_jinode_gh:
455         if (!sdp->sd_args.ar_spectator)
456                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
457
458  fail_journal_gh:
459         if (!sdp->sd_args.ar_spectator)
460                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
461
462  fail_jindex:
463         gfs2_jindex_free(sdp);
464         if (jindex)
465                 gfs2_glock_dq_uninit(&ji_gh);
466
467  fail:
468         gfs2_inode_put(sdp->sd_jindex);
469
470         return error;
471 }
472
473 int gfs2_lookup_root(struct gfs2_sbd *sdp)
474 {
475         int error;
476         struct gfs2_glock *gl;
477
478         error = gfs2_glock_get(sdp, sdp->sd_sb.sb_root_dir.no_addr,
479                                &gfs2_inode_glops, CREATE, &gl);
480         if (!error) {
481                 error = gfs2_inode_get(gl, &sdp->sd_sb.sb_root_dir,
482                                                 CREATE, &sdp->sd_root_dir);
483                 if (!error)
484                         gfs2_inode_min_init(sdp->sd_root_dir, DT_DIR);
485                 gfs2_glock_put(gl);
486         }
487
488         return error;
489 }
490
491
492 static int init_inodes(struct gfs2_sbd *sdp, int undo)
493 {
494         struct inode *inode;
495         struct dentry **dentry = &sdp->sd_vfs->s_root;
496         int error = 0;
497
498         if (undo)
499                 goto fail_dput;
500
501         /* Read in the master inode number inode */
502         error = gfs2_lookup_simple(sdp->sd_master_dir, "inum",
503                                    &sdp->sd_inum_inode);
504         if (error) {
505                 fs_err(sdp, "can't read in inum inode: %d\n", error);
506                 return error;
507         }
508
509         /* Read in the master statfs inode */
510         error = gfs2_lookup_simple(sdp->sd_master_dir, "statfs",
511                                    &sdp->sd_statfs_inode);
512         if (error) {
513                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
514                 goto fail;
515         }
516
517         /* Read in the resource index inode */
518         error = gfs2_lookup_simple(sdp->sd_master_dir, "rindex",
519                                    &sdp->sd_rindex);
520         if (error) {
521                 fs_err(sdp, "can't get resource index inode: %d\n", error);
522                 goto fail_statfs;
523         }
524         set_bit(GLF_STICKY, &sdp->sd_rindex->i_gl->gl_flags);
525         sdp->sd_rindex_vn = sdp->sd_rindex->i_gl->gl_vn - 1;
526
527         /* Read in the quota inode */
528         error = gfs2_lookup_simple(sdp->sd_master_dir, "quota",
529                                    &sdp->sd_quota_inode);
530         if (error) {
531                 fs_err(sdp, "can't get quota file inode: %d\n", error);
532                 goto fail_rindex;
533         }
534
535         /* Get the root inode */
536         error = gfs2_lookup_root(sdp);
537         if (error) {
538                 fs_err(sdp, "can't read in root inode: %d\n", error);
539                 goto fail_qinode;
540         }
541
542         /* Get the root inode/dentry */
543         inode = gfs2_ip2v(sdp->sd_root_dir);
544         if (!inode) {
545                 fs_err(sdp, "can't get root inode\n");
546                 error = -ENOMEM;
547                 goto fail_rooti;
548         }
549
550         *dentry = d_alloc_root(inode);
551         if (!*dentry) {
552                 iput(inode);
553                 fs_err(sdp, "can't get root dentry\n");
554                 error = -ENOMEM;
555                 goto fail_rooti;
556         }
557
558         return 0;
559
560  fail_dput:
561         dput(*dentry);
562         *dentry = NULL;
563
564  fail_rooti:
565         gfs2_inode_put(sdp->sd_root_dir);
566
567  fail_qinode:
568         gfs2_inode_put(sdp->sd_quota_inode);
569
570  fail_rindex:
571         gfs2_clear_rgrpd(sdp);
572         gfs2_inode_put(sdp->sd_rindex);
573
574  fail_statfs:
575         gfs2_inode_put(sdp->sd_statfs_inode);
576
577  fail:
578         gfs2_inode_put(sdp->sd_inum_inode);
579
580         return error;
581 }
582
583 static int init_per_node(struct gfs2_sbd *sdp, int undo)
584 {
585         struct gfs2_inode *pn = NULL;
586         char buf[30];
587         int error = 0;
588
589         if (sdp->sd_args.ar_spectator)
590                 return 0;
591
592         if (undo)
593                 goto fail_qc_gh;
594
595         error = gfs2_lookup_simple(sdp->sd_master_dir, "per_node", &pn);
596         if (error) {
597                 fs_err(sdp, "can't find per_node directory: %d\n", error);
598                 return error;
599         }
600
601         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
602         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ir_inode);
603         if (error) {
604                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
605                 goto fail;
606         }
607
608         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
609         error = gfs2_lookup_simple(pn, buf, &sdp->sd_sc_inode);
610         if (error) {
611                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
612                 goto fail_ir_i;
613         }
614
615         sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
616         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ut_inode);
617         if (error) {
618                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
619                 goto fail_sc_i;
620         }
621
622         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
623         error = gfs2_lookup_simple(pn, buf, &sdp->sd_qc_inode);
624         if (error) {
625                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
626                 goto fail_ut_i;
627         }
628
629         gfs2_inode_put(pn);
630         pn = NULL;
631
632         error = gfs2_glock_nq_init(sdp->sd_ir_inode->i_gl,
633                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
634                                    &sdp->sd_ir_gh);
635         if (error) {
636                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
637                 goto fail_qc_i;
638         }
639
640         error = gfs2_glock_nq_init(sdp->sd_sc_inode->i_gl,
641                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
642                                    &sdp->sd_sc_gh);
643         if (error) {
644                 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
645                 goto fail_ir_gh;
646         }
647
648         error = gfs2_glock_nq_init(sdp->sd_ut_inode->i_gl,
649                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
650                                    &sdp->sd_ut_gh);
651         if (error) {
652                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
653                 goto fail_sc_gh;
654         }
655
656         error = gfs2_glock_nq_init(sdp->sd_qc_inode->i_gl,
657                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
658                                    &sdp->sd_qc_gh);
659         if (error) {
660                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
661                 goto fail_ut_gh;
662         }
663
664         return 0;
665
666  fail_qc_gh:
667         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
668
669  fail_ut_gh:
670         gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
671
672  fail_sc_gh:
673         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
674
675  fail_ir_gh:
676         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
677
678  fail_qc_i:
679         gfs2_inode_put(sdp->sd_qc_inode);
680
681  fail_ut_i:
682         gfs2_inode_put(sdp->sd_ut_inode);
683
684  fail_sc_i:
685         gfs2_inode_put(sdp->sd_sc_inode);
686
687  fail_ir_i:
688         gfs2_inode_put(sdp->sd_ir_inode);
689
690  fail:
691         if (pn)
692                 gfs2_inode_put(pn);
693         return error;
694 }
695
696 static int init_threads(struct gfs2_sbd *sdp, int undo)
697 {
698         struct task_struct *p;
699         int error = 0;
700
701         if (undo)
702                 goto fail_inoded;
703
704         sdp->sd_log_flush_time = jiffies;
705         sdp->sd_jindex_refresh_time = jiffies;
706
707         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
708         error = IS_ERR(p);
709         if (error) {
710                 fs_err(sdp, "can't start logd thread: %d\n", error);
711                 return error;
712         }
713         sdp->sd_logd_process = p;
714
715         sdp->sd_statfs_sync_time = jiffies;
716         sdp->sd_quota_sync_time = jiffies;
717
718         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
719         error = IS_ERR(p);
720         if (error) {
721                 fs_err(sdp, "can't start quotad thread: %d\n", error);
722                 goto fail;
723         }
724         sdp->sd_quotad_process = p;
725
726         p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
727         error = IS_ERR(p);
728         if (error) {
729                 fs_err(sdp, "can't start inoded thread: %d\n", error);
730                 goto fail_quotad;
731         }
732         sdp->sd_inoded_process = p;
733
734         return 0;
735
736  fail_inoded:
737         kthread_stop(sdp->sd_inoded_process);
738
739  fail_quotad:
740         kthread_stop(sdp->sd_quotad_process);
741
742  fail:
743         kthread_stop(sdp->sd_logd_process);
744         
745         return error;
746 }
747
748 /**
749  * fill_super - Read in superblock
750  * @sb: The VFS superblock
751  * @data: Mount options
752  * @silent: Don't complain if it's not a GFS2 filesystem
753  *
754  * Returns: errno
755  */
756
757 static int fill_super(struct super_block *sb, void *data, int silent)
758 {
759         struct gfs2_sbd *sdp;
760         struct gfs2_holder mount_gh;
761         int error;
762
763         sdp = init_sbd(sb);
764         if (!sdp) {
765                 printk("GFS2: can't alloc struct gfs2_sbd\n");
766                 return -ENOMEM;
767         }
768
769         error = gfs2_mount_args(sdp, (char *)data, 0);
770         if (error) {
771                 printk("GFS2: can't parse mount arguments\n");
772                 goto fail;
773         }
774
775         init_vfs(sdp);
776
777         error = init_names(sdp, silent);
778         if (error)
779                 goto fail;
780
781         error = gfs2_sys_fs_add(sdp);
782         if (error)
783                 goto fail;
784
785         error = gfs2_lm_mount(sdp, silent);
786         if (error)
787                 goto fail_sys;
788
789         error = init_locking(sdp, &mount_gh, DO);
790         if (error)
791                 goto fail_lm;
792
793         error = init_sb(sdp, silent, DO);
794         if (error)
795                 goto fail_locking;
796         
797         error = init_journal(sdp, DO);
798         if (error)
799                 goto fail_sb;
800
801         error = init_inodes(sdp, DO);
802         if (error)
803                 goto fail_journals;
804
805         error = init_per_node(sdp, DO);
806         if (error)
807                 goto fail_inodes;
808
809         error = gfs2_statfs_init(sdp);
810         if (error) {
811                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
812                 goto fail_per_node;
813         }
814
815         error = init_threads(sdp, DO);
816         if (error)
817                 goto fail_per_node;
818
819         if (!(sb->s_flags & MS_RDONLY)) {
820                 error = gfs2_make_fs_rw(sdp);
821                 if (error) {
822                         fs_err(sdp, "can't make FS RW: %d\n", error);
823                         goto fail_threads;
824                 }
825         }
826
827         gfs2_glock_dq_uninit(&mount_gh);
828
829         return 0;
830
831  fail_threads:
832         init_threads(sdp, UNDO);
833
834  fail_per_node:
835         init_per_node(sdp, UNDO);
836
837  fail_inodes:
838         init_inodes(sdp, UNDO);
839
840  fail_journals:
841         init_journal(sdp, UNDO);
842
843  fail_sb:
844         init_sb(sdp, 0, UNDO);
845
846  fail_locking:
847         init_locking(sdp, &mount_gh, UNDO);
848
849  fail_lm:
850         gfs2_gl_hash_clear(sdp, WAIT);
851         gfs2_lm_unmount(sdp);
852         while (invalidate_inodes(sb))
853                 yield();
854
855  fail_sys:
856         gfs2_sys_fs_del(sdp);
857
858  fail:
859         vfree(sdp);
860         set_v2sdp(sb, NULL);
861
862         return error;
863 }
864
865 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
866                                        int flags, const char *dev_name,
867                                        void *data)
868 {
869         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
870 }
871
872 struct file_system_type gfs2_fs_type = {
873         .name = "gfs2",
874         .fs_flags = FS_REQUIRES_DEV,
875         .get_sb = gfs2_get_sb,
876         .kill_sb = kill_block_super,
877         .owner = THIS_MODULE,
878 };
879