2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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 version 2.
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/blkdev.h>
16 #include <linux/kthread.h>
17 #include <linux/namei.h>
18 #include <linux/mount.h>
19 #include <linux/gfs2_ondisk.h>
20 #include <linux/lm_interface.h>
40 static const u32 gfs2_old_fs_formats[] = {
44 static const u32 gfs2_old_multihost_formats[] = {
49 * gfs2_tune_init - Fill a gfs2_tune structure with default values
54 static void gfs2_tune_init(struct gfs2_tune *gt)
56 spin_lock_init(>->gt_spin);
58 gt->gt_demote_secs = 300;
59 gt->gt_incore_log_blocks = 1024;
60 gt->gt_log_flush_secs = 60;
61 gt->gt_recoverd_secs = 60;
63 gt->gt_quota_simul_sync = 64;
64 gt->gt_quota_warn_period = 10;
65 gt->gt_quota_scale_num = 1;
66 gt->gt_quota_scale_den = 1;
67 gt->gt_quota_cache_secs = 300;
68 gt->gt_quota_quantum = 60;
69 gt->gt_new_files_jdata = 0;
70 gt->gt_max_readahead = 1 << 18;
71 gt->gt_stall_secs = 600;
72 gt->gt_complain_secs = 10;
73 gt->gt_statfs_quantum = 30;
74 gt->gt_statfs_slow = 0;
77 static struct gfs2_sbd *init_sbd(struct super_block *sb)
81 sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
88 gfs2_tune_init(&sdp->sd_tune);
90 INIT_LIST_HEAD(&sdp->sd_reclaim_list);
91 spin_lock_init(&sdp->sd_reclaim_lock);
92 init_waitqueue_head(&sdp->sd_reclaim_wq);
94 mutex_init(&sdp->sd_inum_mutex);
95 spin_lock_init(&sdp->sd_statfs_spin);
97 spin_lock_init(&sdp->sd_rindex_spin);
98 mutex_init(&sdp->sd_rindex_mutex);
99 INIT_LIST_HEAD(&sdp->sd_rindex_list);
100 INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
102 INIT_LIST_HEAD(&sdp->sd_jindex_list);
103 spin_lock_init(&sdp->sd_jindex_spin);
104 mutex_init(&sdp->sd_jindex_mutex);
106 INIT_LIST_HEAD(&sdp->sd_quota_list);
107 spin_lock_init(&sdp->sd_quota_spin);
108 mutex_init(&sdp->sd_quota_mutex);
109 init_waitqueue_head(&sdp->sd_quota_wait);
110 INIT_LIST_HEAD(&sdp->sd_trunc_list);
111 spin_lock_init(&sdp->sd_trunc_lock);
113 spin_lock_init(&sdp->sd_log_lock);
115 INIT_LIST_HEAD(&sdp->sd_log_le_buf);
116 INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
117 INIT_LIST_HEAD(&sdp->sd_log_le_rg);
118 INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
119 INIT_LIST_HEAD(&sdp->sd_log_le_ordered);
121 mutex_init(&sdp->sd_log_reserve_mutex);
122 INIT_LIST_HEAD(&sdp->sd_ail1_list);
123 INIT_LIST_HEAD(&sdp->sd_ail2_list);
125 init_rwsem(&sdp->sd_log_flush_lock);
126 atomic_set(&sdp->sd_log_in_flight, 0);
127 init_waitqueue_head(&sdp->sd_log_flush_wait);
129 INIT_LIST_HEAD(&sdp->sd_revoke_list);
131 mutex_init(&sdp->sd_freeze_lock);
138 * gfs2_check_sb - Check superblock
139 * @sdp: the filesystem
140 * @sb: The superblock
141 * @silent: Don't print a message if the check fails
143 * Checks the version code of the FS is one that we understand how to
144 * read and that the sizes of the various on-disk structures have not
148 static int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
152 if (sb->sb_magic != GFS2_MAGIC ||
153 sb->sb_type != GFS2_METATYPE_SB) {
155 printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
159 /* If format numbers match exactly, we're done. */
161 if (sb->sb_fs_format == GFS2_FORMAT_FS &&
162 sb->sb_multihost_format == GFS2_FORMAT_MULTI)
165 if (sb->sb_fs_format != GFS2_FORMAT_FS) {
166 for (x = 0; gfs2_old_fs_formats[x]; x++)
167 if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
170 if (!gfs2_old_fs_formats[x]) {
172 "GFS2: code version (%u, %u) is incompatible "
173 "with ondisk format (%u, %u)\n",
174 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
175 sb->sb_fs_format, sb->sb_multihost_format);
177 "GFS2: I don't know how to upgrade this FS\n");
182 if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
183 for (x = 0; gfs2_old_multihost_formats[x]; x++)
184 if (gfs2_old_multihost_formats[x] ==
185 sb->sb_multihost_format)
188 if (!gfs2_old_multihost_formats[x]) {
190 "GFS2: code version (%u, %u) is incompatible "
191 "with ondisk format (%u, %u)\n",
192 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
193 sb->sb_fs_format, sb->sb_multihost_format);
195 "GFS2: I don't know how to upgrade this FS\n");
200 if (!sdp->sd_args.ar_upgrade) {
202 "GFS2: code version (%u, %u) is incompatible "
203 "with ondisk format (%u, %u)\n",
204 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
205 sb->sb_fs_format, sb->sb_multihost_format);
207 "GFS2: Use the \"upgrade\" mount option to upgrade "
209 printk(KERN_INFO "GFS2: See the manual for more details\n");
216 static void end_bio_io_page(struct bio *bio, int error)
218 struct page *page = bio->bi_private;
221 SetPageUptodate(page);
223 printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
227 static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
229 const struct gfs2_sb *str = buf;
231 sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
232 sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
233 sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
234 sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
235 sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
236 sb->sb_bsize = be32_to_cpu(str->sb_bsize);
237 sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
238 sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
239 sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
240 sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
241 sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
243 memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
244 memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
248 * gfs2_read_super - Read the gfs2 super block from disk
249 * @sdp: The GFS2 super block
250 * @sector: The location of the super block
251 * @error: The error code to return
253 * This uses the bio functions to read the super block from disk
254 * because we want to be 100% sure that we never read cached data.
255 * A super block is read twice only during each GFS2 mount and is
256 * never written to by the filesystem. The first time its read no
257 * locks are held, and the only details which are looked at are those
258 * relating to the locking protocol. Once locking is up and working,
259 * the sb is read again under the lock to establish the location of
260 * the master directory (contains pointers to journals etc) and the
263 * Returns: 0 on success or error
266 static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
268 struct super_block *sb = sdp->sd_vfs;
273 page = alloc_page(GFP_NOFS);
277 ClearPageUptodate(page);
278 ClearPageDirty(page);
281 bio = bio_alloc(GFP_NOFS, 1);
282 if (unlikely(!bio)) {
287 bio->bi_sector = sector * (sb->s_blocksize >> 9);
288 bio->bi_bdev = sb->s_bdev;
289 bio_add_page(bio, page, PAGE_SIZE, 0);
291 bio->bi_end_io = end_bio_io_page;
292 bio->bi_private = page;
293 submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
294 wait_on_page_locked(page);
296 if (!PageUptodate(page)) {
301 gfs2_sb_in(&sdp->sd_sb, p);
307 * gfs2_read_sb - Read super block
308 * @sdp: The GFS2 superblock
309 * @gl: the glock for the superblock (assumed to be held)
310 * @silent: Don't print message if mount fails
314 static int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
316 u32 hash_blocks, ind_blocks, leaf_blocks;
321 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
324 fs_err(sdp, "can't read superblock\n");
328 error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
332 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
333 GFS2_BASIC_BLOCK_SHIFT;
334 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
335 sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
336 sizeof(struct gfs2_dinode)) / sizeof(u64);
337 sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
338 sizeof(struct gfs2_meta_header)) / sizeof(u64);
339 sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
340 sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
341 sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
342 sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
343 sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
344 sizeof(struct gfs2_meta_header)) /
345 sizeof(struct gfs2_quota_change);
347 /* Compute maximum reservation required to add a entry to a directory */
349 hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH),
353 for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
354 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
355 ind_blocks += tmp_blocks;
358 leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
360 sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
362 sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
363 sizeof(struct gfs2_dinode);
364 sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
369 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
371 m = do_div(d, sdp->sd_inptrs);
373 if (d != sdp->sd_heightsize[x - 1] || m)
375 sdp->sd_heightsize[x] = space;
377 sdp->sd_max_height = x;
378 sdp->sd_heightsize[x] = ~0;
379 gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
381 sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
382 sizeof(struct gfs2_dinode);
383 sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
388 space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
390 m = do_div(d, sdp->sd_inptrs);
392 if (d != sdp->sd_jheightsize[x - 1] || m)
394 sdp->sd_jheightsize[x] = space;
396 sdp->sd_max_jheight = x;
397 sdp->sd_jheightsize[x] = ~0;
398 gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
403 static int init_names(struct gfs2_sbd *sdp, int silent)
408 proto = sdp->sd_args.ar_lockproto;
409 table = sdp->sd_args.ar_locktable;
411 /* Try to autodetect */
413 if (!proto[0] || !table[0]) {
414 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
418 error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
423 proto = sdp->sd_sb.sb_lockproto;
425 table = sdp->sd_sb.sb_locktable;
429 table = sdp->sd_vfs->s_id;
431 strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
432 strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
434 table = sdp->sd_table_name;
435 while ((table = strchr(table, '/')))
442 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
445 struct task_struct *p;
451 for (sdp->sd_glockd_num = 0;
452 sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
453 sdp->sd_glockd_num++) {
454 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
457 fs_err(sdp, "can't start glockd thread: %d\n", error);
460 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
463 error = gfs2_glock_nq_num(sdp,
464 GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
465 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
468 fs_err(sdp, "can't acquire mount glock: %d\n", error);
472 error = gfs2_glock_nq_num(sdp,
473 GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
475 LM_FLAG_NOEXP | GL_EXACT,
478 fs_err(sdp, "can't acquire live glock: %d\n", error);
482 error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
483 CREATE, &sdp->sd_rename_gl);
485 fs_err(sdp, "can't create rename glock: %d\n", error);
489 error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
490 CREATE, &sdp->sd_trans_gl);
492 fs_err(sdp, "can't create transaction glock: %d\n", error);
495 set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
500 gfs2_glock_put(sdp->sd_trans_gl);
502 gfs2_glock_put(sdp->sd_rename_gl);
504 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
506 gfs2_glock_dq_uninit(mount_gh);
508 while (sdp->sd_glockd_num--)
509 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
514 static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
515 u64 no_addr, const char *name)
517 struct gfs2_sbd *sdp = sb->s_fs_info;
518 struct dentry *dentry;
521 inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
523 fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
524 return PTR_ERR(inode);
526 dentry = d_alloc_root(inode);
528 fs_err(sdp, "can't alloc %s dentry\n", name);
532 dentry->d_op = &gfs2_dops;
537 static int init_sb(struct gfs2_sbd *sdp, int silent)
539 struct super_block *sb = sdp->sd_vfs;
540 struct gfs2_holder sb_gh;
544 ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
545 LM_ST_SHARED, 0, &sb_gh);
547 fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
551 ret = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
553 fs_err(sdp, "can't read superblock: %d\n", ret);
557 /* Set up the buffer cache and SB for real */
558 if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
560 fs_err(sdp, "FS block size (%u) is too small for device "
562 sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
565 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
567 fs_err(sdp, "FS block size (%u) is too big for machine "
569 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
572 sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
574 /* Get the root inode */
575 no_addr = sdp->sd_sb.sb_root_dir.no_addr;
576 ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
580 /* Get the master inode */
581 no_addr = sdp->sd_sb.sb_master_dir.no_addr;
582 ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
584 dput(sdp->sd_root_dir);
587 sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
589 gfs2_glock_dq_uninit(&sb_gh);
594 * map_journal_extents - create a reusable "extent" mapping from all logical
595 * blocks to all physical blocks for the given journal. This will save
596 * us time when writing journal blocks. Most journals will have only one
597 * extent that maps all their logical blocks. That's because gfs2.mkfs
598 * arranges the journal blocks sequentially to maximize performance.
599 * So the extent would map the first block for the entire file length.
600 * However, gfs2_jadd can happen while file activity is happening, so
601 * those journals may not be sequential. Less likely is the case where
602 * the users created their own journals by mounting the metafs and
603 * laying it out. But it's still possible. These journals might have
606 * TODO: This should be done in bigger chunks rather than one block at a time,
607 * but since it's only done at mount time, I'm not worried about the
610 static int map_journal_extents(struct gfs2_sbd *sdp)
612 struct gfs2_jdesc *jd = sdp->sd_jdesc;
614 u64 db, prev_db; /* logical block, disk block, prev disk block */
615 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
616 struct gfs2_journal_extent *jext = NULL;
617 struct buffer_head bh;
622 for (lb = 0; lb < ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; lb++) {
625 bh.b_size = 1 << ip->i_inode.i_blkbits;
626 rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0);
629 printk(KERN_INFO "GFS2 journal mapping error %d: lb="
630 "%u db=%llu\n", rc, lb, (unsigned long long)db);
633 if (!prev_db || db != prev_db + 1) {
634 jext = kzalloc(sizeof(struct gfs2_journal_extent),
637 printk(KERN_INFO "GFS2 error: out of memory "
638 "mapping journal extents.\n");
645 list_add_tail(&jext->extent_list, &jd->extent_list);
654 static void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp)
656 if (!sdp->sd_lockstruct.ls_ops->lm_others_may_mount)
658 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
659 sdp->sd_lockstruct.ls_ops->lm_others_may_mount(
660 sdp->sd_lockstruct.ls_lockspace);
663 static int init_journal(struct gfs2_sbd *sdp, int undo)
665 struct inode *master = sdp->sd_master_dir->d_inode;
666 struct gfs2_holder ji_gh;
667 struct task_struct *p;
668 struct gfs2_inode *ip;
677 sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
678 if (IS_ERR(sdp->sd_jindex)) {
679 fs_err(sdp, "can't lookup journal index: %d\n", error);
680 return PTR_ERR(sdp->sd_jindex);
682 ip = GFS2_I(sdp->sd_jindex);
683 set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
685 /* Load in the journal index special file */
687 error = gfs2_jindex_hold(sdp, &ji_gh);
689 fs_err(sdp, "can't read journal index: %d\n", error);
694 if (!gfs2_jindex_size(sdp)) {
695 fs_err(sdp, "no journals!\n");
699 if (sdp->sd_args.ar_spectator) {
700 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
701 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
703 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
704 fs_err(sdp, "can't mount journal #%u\n",
705 sdp->sd_lockstruct.ls_jid);
706 fs_err(sdp, "there are only %u journals (0 - %u)\n",
707 gfs2_jindex_size(sdp),
708 gfs2_jindex_size(sdp) - 1);
711 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
713 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
715 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
716 &sdp->sd_journal_gh);
718 fs_err(sdp, "can't acquire journal glock: %d\n", error);
722 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
723 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
724 LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
727 fs_err(sdp, "can't acquire journal inode glock: %d\n",
729 goto fail_journal_gh;
732 error = gfs2_jdesc_check(sdp->sd_jdesc);
734 fs_err(sdp, "my journal (%u) is bad: %d\n",
735 sdp->sd_jdesc->jd_jid, error);
738 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
740 /* Map the extents for this journal's blocks */
741 map_journal_extents(sdp);
744 if (sdp->sd_lockstruct.ls_first) {
746 for (x = 0; x < sdp->sd_journals; x++) {
747 error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x));
749 fs_err(sdp, "error recovering journal %u: %d\n",
755 gfs2_lm_others_may_mount(sdp);
756 } else if (!sdp->sd_args.ar_spectator) {
757 error = gfs2_recover_journal(sdp->sd_jdesc);
759 fs_err(sdp, "error recovering my journal: %d\n", error);
764 set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
765 gfs2_glock_dq_uninit(&ji_gh);
768 p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
771 fs_err(sdp, "can't start recoverd thread: %d\n", error);
774 sdp->sd_recoverd_process = p;
779 kthread_stop(sdp->sd_recoverd_process);
781 if (!sdp->sd_args.ar_spectator)
782 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
784 if (!sdp->sd_args.ar_spectator)
785 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
787 gfs2_jindex_free(sdp);
789 gfs2_glock_dq_uninit(&ji_gh);
791 iput(sdp->sd_jindex);
796 static int init_inodes(struct gfs2_sbd *sdp, int undo)
799 struct gfs2_inode *ip;
800 struct inode *master = sdp->sd_master_dir->d_inode;
805 error = init_journal(sdp, undo);
809 /* Read in the master inode number inode */
810 sdp->sd_inum_inode = gfs2_lookup_simple(master, "inum");
811 if (IS_ERR(sdp->sd_inum_inode)) {
812 error = PTR_ERR(sdp->sd_inum_inode);
813 fs_err(sdp, "can't read in inum inode: %d\n", error);
818 /* Read in the master statfs inode */
819 sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
820 if (IS_ERR(sdp->sd_statfs_inode)) {
821 error = PTR_ERR(sdp->sd_statfs_inode);
822 fs_err(sdp, "can't read in statfs inode: %d\n", error);
826 /* Read in the resource index inode */
827 sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
828 if (IS_ERR(sdp->sd_rindex)) {
829 error = PTR_ERR(sdp->sd_rindex);
830 fs_err(sdp, "can't get resource index inode: %d\n", error);
833 ip = GFS2_I(sdp->sd_rindex);
834 set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
835 sdp->sd_rindex_uptodate = 0;
837 /* Read in the quota inode */
838 sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
839 if (IS_ERR(sdp->sd_quota_inode)) {
840 error = PTR_ERR(sdp->sd_quota_inode);
841 fs_err(sdp, "can't get quota file inode: %d\n", error);
847 iput(sdp->sd_quota_inode);
849 gfs2_clear_rgrpd(sdp);
850 iput(sdp->sd_rindex);
852 iput(sdp->sd_statfs_inode);
854 iput(sdp->sd_inum_inode);
856 init_journal(sdp, UNDO);
861 static int init_per_node(struct gfs2_sbd *sdp, int undo)
863 struct inode *pn = NULL;
866 struct gfs2_inode *ip;
867 struct inode *master = sdp->sd_master_dir->d_inode;
869 if (sdp->sd_args.ar_spectator)
875 pn = gfs2_lookup_simple(master, "per_node");
878 fs_err(sdp, "can't find per_node directory: %d\n", error);
882 sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
883 sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
884 if (IS_ERR(sdp->sd_ir_inode)) {
885 error = PTR_ERR(sdp->sd_ir_inode);
886 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
890 sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
891 sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
892 if (IS_ERR(sdp->sd_sc_inode)) {
893 error = PTR_ERR(sdp->sd_sc_inode);
894 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
898 sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
899 sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
900 if (IS_ERR(sdp->sd_qc_inode)) {
901 error = PTR_ERR(sdp->sd_qc_inode);
902 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
909 ip = GFS2_I(sdp->sd_ir_inode);
910 error = gfs2_glock_nq_init(ip->i_gl,
914 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
918 ip = GFS2_I(sdp->sd_sc_inode);
919 error = gfs2_glock_nq_init(ip->i_gl,
923 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
927 ip = GFS2_I(sdp->sd_qc_inode);
928 error = gfs2_glock_nq_init(ip->i_gl,
932 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
939 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
941 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
943 gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
945 iput(sdp->sd_qc_inode);
947 iput(sdp->sd_sc_inode);
949 iput(sdp->sd_ir_inode);
956 static int init_threads(struct gfs2_sbd *sdp, int undo)
958 struct task_struct *p;
964 sdp->sd_log_flush_time = jiffies;
965 sdp->sd_jindex_refresh_time = jiffies;
967 p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
970 fs_err(sdp, "can't start logd thread: %d\n", error);
973 sdp->sd_logd_process = p;
975 p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
978 fs_err(sdp, "can't start quotad thread: %d\n", error);
981 sdp->sd_quotad_process = p;
987 kthread_stop(sdp->sd_quotad_process);
989 kthread_stop(sdp->sd_logd_process);
994 * gfs2_lm_mount - mount a locking protocol
995 * @sdp: the filesystem
996 * @args: mount arguements
997 * @silent: if 1, don't complain if the FS isn't a GFS2 fs
1002 static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
1004 char *proto = sdp->sd_proto_name;
1005 char *table = sdp->sd_table_name;
1006 int flags = LM_MFLAG_CONV_NODROP;
1009 if (sdp->sd_args.ar_spectator)
1010 flags |= LM_MFLAG_SPECTATOR;
1012 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
1014 error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata,
1016 GFS2_MIN_LVB_SIZE, flags,
1017 &sdp->sd_lockstruct, &sdp->sd_kobj);
1019 fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n",
1020 proto, table, sdp->sd_args.ar_hostdata);
1024 if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) ||
1025 gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >=
1026 GFS2_MIN_LVB_SIZE)) {
1027 gfs2_unmount_lockproto(&sdp->sd_lockstruct);
1031 if (sdp->sd_args.ar_spectator)
1032 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table);
1034 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
1035 sdp->sd_lockstruct.ls_jid);
1037 fs_info(sdp, "Joined cluster. Now mounting FS...\n");
1039 if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) &&
1040 !sdp->sd_args.ar_ignore_local_fs) {
1041 sdp->sd_args.ar_localflocks = 1;
1042 sdp->sd_args.ar_localcaching = 1;
1049 void gfs2_lm_unmount(struct gfs2_sbd *sdp)
1051 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
1052 gfs2_unmount_lockproto(&sdp->sd_lockstruct);
1056 * fill_super - Read in superblock
1057 * @sb: The VFS superblock
1058 * @data: Mount options
1059 * @silent: Don't complain if it's not a GFS2 filesystem
1064 static int fill_super(struct super_block *sb, void *data, int silent)
1066 struct gfs2_sbd *sdp;
1067 struct gfs2_holder mount_gh;
1072 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
1076 error = gfs2_mount_args(sdp, (char *)data, 0);
1078 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
1082 sb->s_magic = GFS2_MAGIC;
1083 sb->s_op = &gfs2_super_ops;
1084 sb->s_export_op = &gfs2_export_ops;
1085 sb->s_time_gran = 1;
1086 sb->s_maxbytes = MAX_LFS_FILESIZE;
1088 /* Set up the buffer cache and fill in some fake block size values
1089 to allow us to read-in the on-disk superblock. */
1090 sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
1091 sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
1092 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
1093 GFS2_BASIC_BLOCK_SHIFT;
1094 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
1096 error = init_names(sdp, silent);
1100 gfs2_create_debugfs_file(sdp);
1102 error = gfs2_sys_fs_add(sdp);
1106 error = gfs2_lm_mount(sdp, silent);
1110 error = init_locking(sdp, &mount_gh, DO);
1114 error = init_sb(sdp, silent);
1118 error = init_inodes(sdp, DO);
1122 error = init_per_node(sdp, DO);
1126 error = gfs2_statfs_init(sdp);
1128 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
1132 error = init_threads(sdp, DO);
1136 if (!(sb->s_flags & MS_RDONLY)) {
1137 error = gfs2_make_fs_rw(sdp);
1139 fs_err(sdp, "can't make FS RW: %d\n", error);
1144 gfs2_glock_dq_uninit(&mount_gh);
1149 init_threads(sdp, UNDO);
1151 init_per_node(sdp, UNDO);
1153 init_inodes(sdp, UNDO);
1155 if (sdp->sd_root_dir)
1156 dput(sdp->sd_root_dir);
1157 if (sdp->sd_master_dir)
1158 dput(sdp->sd_master_dir);
1161 init_locking(sdp, &mount_gh, UNDO);
1163 gfs2_gl_hash_clear(sdp);
1164 gfs2_lm_unmount(sdp);
1165 while (invalidate_inodes(sb))
1168 gfs2_sys_fs_del(sdp);
1170 gfs2_delete_debugfs_file(sdp);
1172 sb->s_fs_info = NULL;
1176 static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
1177 const char *dev_name, void *data, struct vfsmount *mnt)
1179 return get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
1182 static struct super_block *get_gfs2_sb(const char *dev_name)
1184 struct super_block *sb;
1185 struct nameidata nd;
1188 error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
1190 printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
1194 sb = nd.path.dentry->d_inode->i_sb;
1195 if (sb && (sb->s_type == &gfs2_fs_type))
1196 atomic_inc(&sb->s_active);
1203 static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
1204 const char *dev_name, void *data, struct vfsmount *mnt)
1206 struct super_block *sb = NULL;
1207 struct gfs2_sbd *sdp;
1209 sb = get_gfs2_sb(dev_name);
1211 printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
1214 sdp = sb->s_fs_info;
1216 mnt->mnt_root = dget(sdp->sd_master_dir);
1220 static void gfs2_kill_sb(struct super_block *sb)
1222 struct gfs2_sbd *sdp = sb->s_fs_info;
1224 gfs2_meta_syncfs(sdp);
1225 dput(sdp->sd_root_dir);
1226 dput(sdp->sd_master_dir);
1227 sdp->sd_root_dir = NULL;
1228 sdp->sd_master_dir = NULL;
1230 shrink_dcache_sb(sb);
1231 kill_block_super(sb);
1233 gfs2_delete_debugfs_file(sdp);
1236 struct file_system_type gfs2_fs_type = {
1238 .fs_flags = FS_REQUIRES_DEV,
1239 .get_sb = gfs2_get_sb,
1240 .kill_sb = gfs2_kill_sb,
1241 .owner = THIS_MODULE,
1244 struct file_system_type gfs2meta_fs_type = {
1246 .fs_flags = FS_REQUIRES_DEV,
1247 .get_sb = gfs2_get_sb_meta,
1248 .owner = THIS_MODULE,