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/slow-work.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_incore_log_blocks
= 1024;
60 gt
->gt_quota_simul_sync
= 64;
61 gt
->gt_quota_warn_period
= 10;
62 gt
->gt_quota_scale_num
= 1;
63 gt
->gt_quota_scale_den
= 1;
64 gt
->gt_quota_quantum
= 60;
65 gt
->gt_new_files_jdata
= 0;
66 gt
->gt_max_readahead
= 1 << 18;
67 gt
->gt_stall_secs
= 600;
68 gt
->gt_complain_secs
= 10;
69 gt
->gt_statfs_quantum
= 30;
70 gt
->gt_statfs_slow
= 0;
73 static struct gfs2_sbd
*init_sbd(struct super_block
*sb
)
77 sdp
= kzalloc(sizeof(struct gfs2_sbd
), GFP_KERNEL
);
84 gfs2_tune_init(&sdp
->sd_tune
);
86 mutex_init(&sdp
->sd_inum_mutex
);
87 spin_lock_init(&sdp
->sd_statfs_spin
);
89 spin_lock_init(&sdp
->sd_rindex_spin
);
90 mutex_init(&sdp
->sd_rindex_mutex
);
91 INIT_LIST_HEAD(&sdp
->sd_rindex_list
);
92 INIT_LIST_HEAD(&sdp
->sd_rindex_mru_list
);
94 INIT_LIST_HEAD(&sdp
->sd_jindex_list
);
95 spin_lock_init(&sdp
->sd_jindex_spin
);
96 mutex_init(&sdp
->sd_jindex_mutex
);
98 INIT_LIST_HEAD(&sdp
->sd_quota_list
);
99 mutex_init(&sdp
->sd_quota_mutex
);
100 init_waitqueue_head(&sdp
->sd_quota_wait
);
101 INIT_LIST_HEAD(&sdp
->sd_trunc_list
);
102 spin_lock_init(&sdp
->sd_trunc_lock
);
104 spin_lock_init(&sdp
->sd_log_lock
);
106 INIT_LIST_HEAD(&sdp
->sd_log_le_buf
);
107 INIT_LIST_HEAD(&sdp
->sd_log_le_revoke
);
108 INIT_LIST_HEAD(&sdp
->sd_log_le_rg
);
109 INIT_LIST_HEAD(&sdp
->sd_log_le_databuf
);
110 INIT_LIST_HEAD(&sdp
->sd_log_le_ordered
);
112 mutex_init(&sdp
->sd_log_reserve_mutex
);
113 INIT_LIST_HEAD(&sdp
->sd_ail1_list
);
114 INIT_LIST_HEAD(&sdp
->sd_ail2_list
);
116 init_rwsem(&sdp
->sd_log_flush_lock
);
117 atomic_set(&sdp
->sd_log_in_flight
, 0);
118 init_waitqueue_head(&sdp
->sd_log_flush_wait
);
120 INIT_LIST_HEAD(&sdp
->sd_revoke_list
);
122 mutex_init(&sdp
->sd_freeze_lock
);
129 * gfs2_check_sb - Check superblock
130 * @sdp: the filesystem
131 * @sb: The superblock
132 * @silent: Don't print a message if the check fails
134 * Checks the version code of the FS is one that we understand how to
135 * read and that the sizes of the various on-disk structures have not
139 static int gfs2_check_sb(struct gfs2_sbd
*sdp
, struct gfs2_sb_host
*sb
, int silent
)
143 if (sb
->sb_magic
!= GFS2_MAGIC
||
144 sb
->sb_type
!= GFS2_METATYPE_SB
) {
146 printk(KERN_WARNING
"GFS2: not a GFS2 filesystem\n");
150 /* If format numbers match exactly, we're done. */
152 if (sb
->sb_fs_format
== GFS2_FORMAT_FS
&&
153 sb
->sb_multihost_format
== GFS2_FORMAT_MULTI
)
156 if (sb
->sb_fs_format
!= GFS2_FORMAT_FS
) {
157 for (x
= 0; gfs2_old_fs_formats
[x
]; x
++)
158 if (gfs2_old_fs_formats
[x
] == sb
->sb_fs_format
)
161 if (!gfs2_old_fs_formats
[x
]) {
163 "GFS2: code version (%u, %u) is incompatible "
164 "with ondisk format (%u, %u)\n",
165 GFS2_FORMAT_FS
, GFS2_FORMAT_MULTI
,
166 sb
->sb_fs_format
, sb
->sb_multihost_format
);
168 "GFS2: I don't know how to upgrade this FS\n");
173 if (sb
->sb_multihost_format
!= GFS2_FORMAT_MULTI
) {
174 for (x
= 0; gfs2_old_multihost_formats
[x
]; x
++)
175 if (gfs2_old_multihost_formats
[x
] ==
176 sb
->sb_multihost_format
)
179 if (!gfs2_old_multihost_formats
[x
]) {
181 "GFS2: code version (%u, %u) is incompatible "
182 "with ondisk format (%u, %u)\n",
183 GFS2_FORMAT_FS
, GFS2_FORMAT_MULTI
,
184 sb
->sb_fs_format
, sb
->sb_multihost_format
);
186 "GFS2: I don't know how to upgrade this FS\n");
191 if (!sdp
->sd_args
.ar_upgrade
) {
193 "GFS2: code version (%u, %u) is incompatible "
194 "with ondisk format (%u, %u)\n",
195 GFS2_FORMAT_FS
, GFS2_FORMAT_MULTI
,
196 sb
->sb_fs_format
, sb
->sb_multihost_format
);
198 "GFS2: Use the \"upgrade\" mount option to upgrade "
200 printk(KERN_INFO
"GFS2: See the manual for more details\n");
207 static void end_bio_io_page(struct bio
*bio
, int error
)
209 struct page
*page
= bio
->bi_private
;
212 SetPageUptodate(page
);
214 printk(KERN_WARNING
"gfs2: error %d reading superblock\n", error
);
218 static void gfs2_sb_in(struct gfs2_sb_host
*sb
, const void *buf
)
220 const struct gfs2_sb
*str
= buf
;
222 sb
->sb_magic
= be32_to_cpu(str
->sb_header
.mh_magic
);
223 sb
->sb_type
= be32_to_cpu(str
->sb_header
.mh_type
);
224 sb
->sb_format
= be32_to_cpu(str
->sb_header
.mh_format
);
225 sb
->sb_fs_format
= be32_to_cpu(str
->sb_fs_format
);
226 sb
->sb_multihost_format
= be32_to_cpu(str
->sb_multihost_format
);
227 sb
->sb_bsize
= be32_to_cpu(str
->sb_bsize
);
228 sb
->sb_bsize_shift
= be32_to_cpu(str
->sb_bsize_shift
);
229 sb
->sb_master_dir
.no_addr
= be64_to_cpu(str
->sb_master_dir
.no_addr
);
230 sb
->sb_master_dir
.no_formal_ino
= be64_to_cpu(str
->sb_master_dir
.no_formal_ino
);
231 sb
->sb_root_dir
.no_addr
= be64_to_cpu(str
->sb_root_dir
.no_addr
);
232 sb
->sb_root_dir
.no_formal_ino
= be64_to_cpu(str
->sb_root_dir
.no_formal_ino
);
234 memcpy(sb
->sb_lockproto
, str
->sb_lockproto
, GFS2_LOCKNAME_LEN
);
235 memcpy(sb
->sb_locktable
, str
->sb_locktable
, GFS2_LOCKNAME_LEN
);
236 memcpy(sb
->sb_uuid
, str
->sb_uuid
, 16);
240 * gfs2_read_super - Read the gfs2 super block from disk
241 * @sdp: The GFS2 super block
242 * @sector: The location of the super block
243 * @error: The error code to return
245 * This uses the bio functions to read the super block from disk
246 * because we want to be 100% sure that we never read cached data.
247 * A super block is read twice only during each GFS2 mount and is
248 * never written to by the filesystem. The first time its read no
249 * locks are held, and the only details which are looked at are those
250 * relating to the locking protocol. Once locking is up and working,
251 * the sb is read again under the lock to establish the location of
252 * the master directory (contains pointers to journals etc) and the
255 * Returns: 0 on success or error
258 static int gfs2_read_super(struct gfs2_sbd
*sdp
, sector_t sector
)
260 struct super_block
*sb
= sdp
->sd_vfs
;
265 page
= alloc_page(GFP_NOFS
);
269 ClearPageUptodate(page
);
270 ClearPageDirty(page
);
273 bio
= bio_alloc(GFP_NOFS
, 1);
274 bio
->bi_sector
= sector
* (sb
->s_blocksize
>> 9);
275 bio
->bi_bdev
= sb
->s_bdev
;
276 bio_add_page(bio
, page
, PAGE_SIZE
, 0);
278 bio
->bi_end_io
= end_bio_io_page
;
279 bio
->bi_private
= page
;
280 submit_bio(READ_SYNC
| (1 << BIO_RW_META
), bio
);
281 wait_on_page_locked(page
);
283 if (!PageUptodate(page
)) {
288 gfs2_sb_in(&sdp
->sd_sb
, p
);
295 * gfs2_read_sb - Read super block
296 * @sdp: The GFS2 superblock
297 * @silent: Don't print message if mount fails
301 static int gfs2_read_sb(struct gfs2_sbd
*sdp
, int silent
)
303 u32 hash_blocks
, ind_blocks
, leaf_blocks
;
308 error
= gfs2_read_super(sdp
, GFS2_SB_ADDR
>> sdp
->sd_fsb2bb_shift
);
311 fs_err(sdp
, "can't read superblock\n");
315 error
= gfs2_check_sb(sdp
, &sdp
->sd_sb
, silent
);
319 sdp
->sd_fsb2bb_shift
= sdp
->sd_sb
.sb_bsize_shift
-
320 GFS2_BASIC_BLOCK_SHIFT
;
321 sdp
->sd_fsb2bb
= 1 << sdp
->sd_fsb2bb_shift
;
322 sdp
->sd_diptrs
= (sdp
->sd_sb
.sb_bsize
-
323 sizeof(struct gfs2_dinode
)) / sizeof(u64
);
324 sdp
->sd_inptrs
= (sdp
->sd_sb
.sb_bsize
-
325 sizeof(struct gfs2_meta_header
)) / sizeof(u64
);
326 sdp
->sd_jbsize
= sdp
->sd_sb
.sb_bsize
- sizeof(struct gfs2_meta_header
);
327 sdp
->sd_hash_bsize
= sdp
->sd_sb
.sb_bsize
/ 2;
328 sdp
->sd_hash_bsize_shift
= sdp
->sd_sb
.sb_bsize_shift
- 1;
329 sdp
->sd_hash_ptrs
= sdp
->sd_hash_bsize
/ sizeof(u64
);
330 sdp
->sd_qc_per_block
= (sdp
->sd_sb
.sb_bsize
-
331 sizeof(struct gfs2_meta_header
)) /
332 sizeof(struct gfs2_quota_change
);
334 /* Compute maximum reservation required to add a entry to a directory */
336 hash_blocks
= DIV_ROUND_UP(sizeof(u64
) * (1 << GFS2_DIR_MAX_DEPTH
),
340 for (tmp_blocks
= hash_blocks
; tmp_blocks
> sdp
->sd_diptrs
;) {
341 tmp_blocks
= DIV_ROUND_UP(tmp_blocks
, sdp
->sd_inptrs
);
342 ind_blocks
+= tmp_blocks
;
345 leaf_blocks
= 2 + GFS2_DIR_MAX_DEPTH
;
347 sdp
->sd_max_dirres
= hash_blocks
+ ind_blocks
+ leaf_blocks
;
349 sdp
->sd_heightsize
[0] = sdp
->sd_sb
.sb_bsize
-
350 sizeof(struct gfs2_dinode
);
351 sdp
->sd_heightsize
[1] = sdp
->sd_sb
.sb_bsize
* sdp
->sd_diptrs
;
356 space
= sdp
->sd_heightsize
[x
- 1] * sdp
->sd_inptrs
;
358 m
= do_div(d
, sdp
->sd_inptrs
);
360 if (d
!= sdp
->sd_heightsize
[x
- 1] || m
)
362 sdp
->sd_heightsize
[x
] = space
;
364 sdp
->sd_max_height
= x
;
365 sdp
->sd_heightsize
[x
] = ~0;
366 gfs2_assert(sdp
, sdp
->sd_max_height
<= GFS2_MAX_META_HEIGHT
);
368 sdp
->sd_jheightsize
[0] = sdp
->sd_sb
.sb_bsize
-
369 sizeof(struct gfs2_dinode
);
370 sdp
->sd_jheightsize
[1] = sdp
->sd_jbsize
* sdp
->sd_diptrs
;
375 space
= sdp
->sd_jheightsize
[x
- 1] * sdp
->sd_inptrs
;
377 m
= do_div(d
, sdp
->sd_inptrs
);
379 if (d
!= sdp
->sd_jheightsize
[x
- 1] || m
)
381 sdp
->sd_jheightsize
[x
] = space
;
383 sdp
->sd_max_jheight
= x
;
384 sdp
->sd_jheightsize
[x
] = ~0;
385 gfs2_assert(sdp
, sdp
->sd_max_jheight
<= GFS2_MAX_META_HEIGHT
);
390 static int init_names(struct gfs2_sbd
*sdp
, int silent
)
395 proto
= sdp
->sd_args
.ar_lockproto
;
396 table
= sdp
->sd_args
.ar_locktable
;
398 /* Try to autodetect */
400 if (!proto
[0] || !table
[0]) {
401 error
= gfs2_read_super(sdp
, GFS2_SB_ADDR
>> sdp
->sd_fsb2bb_shift
);
405 error
= gfs2_check_sb(sdp
, &sdp
->sd_sb
, silent
);
410 proto
= sdp
->sd_sb
.sb_lockproto
;
412 table
= sdp
->sd_sb
.sb_locktable
;
416 table
= sdp
->sd_vfs
->s_id
;
418 strlcpy(sdp
->sd_proto_name
, proto
, GFS2_FSNAME_LEN
);
419 strlcpy(sdp
->sd_table_name
, table
, GFS2_FSNAME_LEN
);
421 table
= sdp
->sd_table_name
;
422 while ((table
= strchr(table
, '/')))
429 static int init_locking(struct gfs2_sbd
*sdp
, struct gfs2_holder
*mount_gh
,
437 error
= gfs2_glock_nq_num(sdp
,
438 GFS2_MOUNT_LOCK
, &gfs2_nondisk_glops
,
439 LM_ST_EXCLUSIVE
, LM_FLAG_NOEXP
| GL_NOCACHE
,
442 fs_err(sdp
, "can't acquire mount glock: %d\n", error
);
446 error
= gfs2_glock_nq_num(sdp
,
447 GFS2_LIVE_LOCK
, &gfs2_nondisk_glops
,
449 LM_FLAG_NOEXP
| GL_EXACT
,
452 fs_err(sdp
, "can't acquire live glock: %d\n", error
);
456 error
= gfs2_glock_get(sdp
, GFS2_RENAME_LOCK
, &gfs2_nondisk_glops
,
457 CREATE
, &sdp
->sd_rename_gl
);
459 fs_err(sdp
, "can't create rename glock: %d\n", error
);
463 error
= gfs2_glock_get(sdp
, GFS2_TRANS_LOCK
, &gfs2_trans_glops
,
464 CREATE
, &sdp
->sd_trans_gl
);
466 fs_err(sdp
, "can't create transaction glock: %d\n", error
);
473 gfs2_glock_put(sdp
->sd_trans_gl
);
475 gfs2_glock_put(sdp
->sd_rename_gl
);
477 gfs2_glock_dq_uninit(&sdp
->sd_live_gh
);
479 gfs2_glock_dq_uninit(mount_gh
);
484 static int gfs2_lookup_root(struct super_block
*sb
, struct dentry
**dptr
,
485 u64 no_addr
, const char *name
)
487 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
488 struct dentry
*dentry
;
491 inode
= gfs2_inode_lookup(sb
, DT_DIR
, no_addr
, 0, 0);
493 fs_err(sdp
, "can't read in %s inode: %ld\n", name
, PTR_ERR(inode
));
494 return PTR_ERR(inode
);
496 dentry
= d_alloc_root(inode
);
498 fs_err(sdp
, "can't alloc %s dentry\n", name
);
502 dentry
->d_op
= &gfs2_dops
;
507 static int init_sb(struct gfs2_sbd
*sdp
, int silent
)
509 struct super_block
*sb
= sdp
->sd_vfs
;
510 struct gfs2_holder sb_gh
;
514 ret
= gfs2_glock_nq_num(sdp
, GFS2_SB_LOCK
, &gfs2_meta_glops
,
515 LM_ST_SHARED
, 0, &sb_gh
);
517 fs_err(sdp
, "can't acquire superblock glock: %d\n", ret
);
521 ret
= gfs2_read_sb(sdp
, silent
);
523 fs_err(sdp
, "can't read superblock: %d\n", ret
);
527 /* Set up the buffer cache and SB for real */
528 if (sdp
->sd_sb
.sb_bsize
< bdev_logical_block_size(sb
->s_bdev
)) {
530 fs_err(sdp
, "FS block size (%u) is too small for device "
532 sdp
->sd_sb
.sb_bsize
, bdev_logical_block_size(sb
->s_bdev
));
535 if (sdp
->sd_sb
.sb_bsize
> PAGE_SIZE
) {
537 fs_err(sdp
, "FS block size (%u) is too big for machine "
539 sdp
->sd_sb
.sb_bsize
, (unsigned int)PAGE_SIZE
);
542 sb_set_blocksize(sb
, sdp
->sd_sb
.sb_bsize
);
544 /* Get the root inode */
545 no_addr
= sdp
->sd_sb
.sb_root_dir
.no_addr
;
546 ret
= gfs2_lookup_root(sb
, &sdp
->sd_root_dir
, no_addr
, "root");
550 /* Get the master inode */
551 no_addr
= sdp
->sd_sb
.sb_master_dir
.no_addr
;
552 ret
= gfs2_lookup_root(sb
, &sdp
->sd_master_dir
, no_addr
, "master");
554 dput(sdp
->sd_root_dir
);
557 sb
->s_root
= dget(sdp
->sd_args
.ar_meta
? sdp
->sd_master_dir
: sdp
->sd_root_dir
);
559 gfs2_glock_dq_uninit(&sb_gh
);
564 * map_journal_extents - create a reusable "extent" mapping from all logical
565 * blocks to all physical blocks for the given journal. This will save
566 * us time when writing journal blocks. Most journals will have only one
567 * extent that maps all their logical blocks. That's because gfs2.mkfs
568 * arranges the journal blocks sequentially to maximize performance.
569 * So the extent would map the first block for the entire file length.
570 * However, gfs2_jadd can happen while file activity is happening, so
571 * those journals may not be sequential. Less likely is the case where
572 * the users created their own journals by mounting the metafs and
573 * laying it out. But it's still possible. These journals might have
576 * TODO: This should be done in bigger chunks rather than one block at a time,
577 * but since it's only done at mount time, I'm not worried about the
580 static int map_journal_extents(struct gfs2_sbd
*sdp
)
582 struct gfs2_jdesc
*jd
= sdp
->sd_jdesc
;
584 u64 db
, prev_db
; /* logical block, disk block, prev disk block */
585 struct gfs2_inode
*ip
= GFS2_I(jd
->jd_inode
);
586 struct gfs2_journal_extent
*jext
= NULL
;
587 struct buffer_head bh
;
592 for (lb
= 0; lb
< ip
->i_disksize
>> sdp
->sd_sb
.sb_bsize_shift
; lb
++) {
595 bh
.b_size
= 1 << ip
->i_inode
.i_blkbits
;
596 rc
= gfs2_block_map(jd
->jd_inode
, lb
, &bh
, 0);
599 printk(KERN_INFO
"GFS2 journal mapping error %d: lb="
600 "%u db=%llu\n", rc
, lb
, (unsigned long long)db
);
603 if (!prev_db
|| db
!= prev_db
+ 1) {
604 jext
= kzalloc(sizeof(struct gfs2_journal_extent
),
607 printk(KERN_INFO
"GFS2 error: out of memory "
608 "mapping journal extents.\n");
615 list_add_tail(&jext
->extent_list
, &jd
->extent_list
);
624 static void gfs2_others_may_mount(struct gfs2_sbd
*sdp
)
626 char *message
= "FIRSTMOUNT=Done";
627 char *envp
[] = { message
, NULL
};
628 struct lm_lockstruct
*ls
= &sdp
->sd_lockstruct
;
629 ls
->ls_first_done
= 1;
630 kobject_uevent_env(&sdp
->sd_kobj
, KOBJ_CHANGE
, envp
);
634 * gfs2_jindex_hold - Grab a lock on the jindex
635 * @sdp: The GFS2 superblock
636 * @ji_gh: the holder for the jindex glock
641 static int gfs2_jindex_hold(struct gfs2_sbd
*sdp
, struct gfs2_holder
*ji_gh
)
643 struct gfs2_inode
*dip
= GFS2_I(sdp
->sd_jindex
);
646 struct gfs2_jdesc
*jd
;
651 mutex_lock(&sdp
->sd_jindex_mutex
);
654 error
= gfs2_glock_nq_init(dip
->i_gl
, LM_ST_SHARED
, 0, ji_gh
);
658 name
.len
= sprintf(buf
, "journal%u", sdp
->sd_journals
);
659 name
.hash
= gfs2_disk_hash(name
.name
, name
.len
);
661 error
= gfs2_dir_check(sdp
->sd_jindex
, &name
, NULL
);
662 if (error
== -ENOENT
) {
667 gfs2_glock_dq_uninit(ji_gh
);
673 jd
= kzalloc(sizeof(struct gfs2_jdesc
), GFP_KERNEL
);
677 INIT_LIST_HEAD(&jd
->extent_list
);
678 slow_work_init(&jd
->jd_work
, &gfs2_recover_ops
);
679 jd
->jd_inode
= gfs2_lookupi(sdp
->sd_jindex
, &name
, 1);
680 if (!jd
->jd_inode
|| IS_ERR(jd
->jd_inode
)) {
684 error
= PTR_ERR(jd
->jd_inode
);
689 spin_lock(&sdp
->sd_jindex_spin
);
690 jd
->jd_jid
= sdp
->sd_journals
++;
691 list_add_tail(&jd
->jd_list
, &sdp
->sd_jindex_list
);
692 spin_unlock(&sdp
->sd_jindex_spin
);
695 mutex_unlock(&sdp
->sd_jindex_mutex
);
700 static int init_journal(struct gfs2_sbd
*sdp
, int undo
)
702 struct inode
*master
= sdp
->sd_master_dir
->d_inode
;
703 struct gfs2_holder ji_gh
;
704 struct gfs2_inode
*ip
;
713 sdp
->sd_jindex
= gfs2_lookup_simple(master
, "jindex");
714 if (IS_ERR(sdp
->sd_jindex
)) {
715 fs_err(sdp
, "can't lookup journal index: %d\n", error
);
716 return PTR_ERR(sdp
->sd_jindex
);
718 ip
= GFS2_I(sdp
->sd_jindex
);
720 /* Load in the journal index special file */
722 error
= gfs2_jindex_hold(sdp
, &ji_gh
);
724 fs_err(sdp
, "can't read journal index: %d\n", error
);
729 if (!gfs2_jindex_size(sdp
)) {
730 fs_err(sdp
, "no journals!\n");
734 if (sdp
->sd_args
.ar_spectator
) {
735 sdp
->sd_jdesc
= gfs2_jdesc_find(sdp
, 0);
736 atomic_set(&sdp
->sd_log_blks_free
, sdp
->sd_jdesc
->jd_blocks
);
738 if (sdp
->sd_lockstruct
.ls_jid
>= gfs2_jindex_size(sdp
)) {
739 fs_err(sdp
, "can't mount journal #%u\n",
740 sdp
->sd_lockstruct
.ls_jid
);
741 fs_err(sdp
, "there are only %u journals (0 - %u)\n",
742 gfs2_jindex_size(sdp
),
743 gfs2_jindex_size(sdp
) - 1);
746 sdp
->sd_jdesc
= gfs2_jdesc_find(sdp
, sdp
->sd_lockstruct
.ls_jid
);
748 error
= gfs2_glock_nq_num(sdp
, sdp
->sd_lockstruct
.ls_jid
,
750 LM_ST_EXCLUSIVE
, LM_FLAG_NOEXP
,
751 &sdp
->sd_journal_gh
);
753 fs_err(sdp
, "can't acquire journal glock: %d\n", error
);
757 ip
= GFS2_I(sdp
->sd_jdesc
->jd_inode
);
758 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
,
759 LM_FLAG_NOEXP
| GL_EXACT
| GL_NOCACHE
,
762 fs_err(sdp
, "can't acquire journal inode glock: %d\n",
764 goto fail_journal_gh
;
767 error
= gfs2_jdesc_check(sdp
->sd_jdesc
);
769 fs_err(sdp
, "my journal (%u) is bad: %d\n",
770 sdp
->sd_jdesc
->jd_jid
, error
);
773 atomic_set(&sdp
->sd_log_blks_free
, sdp
->sd_jdesc
->jd_blocks
);
775 /* Map the extents for this journal's blocks */
776 map_journal_extents(sdp
);
779 if (sdp
->sd_lockstruct
.ls_first
) {
781 for (x
= 0; x
< sdp
->sd_journals
; x
++) {
782 error
= gfs2_recover_journal(gfs2_jdesc_find(sdp
, x
));
784 fs_err(sdp
, "error recovering journal %u: %d\n",
790 gfs2_others_may_mount(sdp
);
791 } else if (!sdp
->sd_args
.ar_spectator
) {
792 error
= gfs2_recover_journal(sdp
->sd_jdesc
);
794 fs_err(sdp
, "error recovering my journal: %d\n", error
);
799 set_bit(SDF_JOURNAL_CHECKED
, &sdp
->sd_flags
);
800 gfs2_glock_dq_uninit(&ji_gh
);
806 if (!sdp
->sd_args
.ar_spectator
)
807 gfs2_glock_dq_uninit(&sdp
->sd_jinode_gh
);
809 if (!sdp
->sd_args
.ar_spectator
)
810 gfs2_glock_dq_uninit(&sdp
->sd_journal_gh
);
812 gfs2_jindex_free(sdp
);
814 gfs2_glock_dq_uninit(&ji_gh
);
816 iput(sdp
->sd_jindex
);
821 static int init_inodes(struct gfs2_sbd
*sdp
, int undo
)
824 struct gfs2_inode
*ip
;
825 struct inode
*master
= sdp
->sd_master_dir
->d_inode
;
830 error
= init_journal(sdp
, undo
);
834 /* Read in the master inode number inode */
835 sdp
->sd_inum_inode
= gfs2_lookup_simple(master
, "inum");
836 if (IS_ERR(sdp
->sd_inum_inode
)) {
837 error
= PTR_ERR(sdp
->sd_inum_inode
);
838 fs_err(sdp
, "can't read in inum inode: %d\n", error
);
843 /* Read in the master statfs inode */
844 sdp
->sd_statfs_inode
= gfs2_lookup_simple(master
, "statfs");
845 if (IS_ERR(sdp
->sd_statfs_inode
)) {
846 error
= PTR_ERR(sdp
->sd_statfs_inode
);
847 fs_err(sdp
, "can't read in statfs inode: %d\n", error
);
851 /* Read in the resource index inode */
852 sdp
->sd_rindex
= gfs2_lookup_simple(master
, "rindex");
853 if (IS_ERR(sdp
->sd_rindex
)) {
854 error
= PTR_ERR(sdp
->sd_rindex
);
855 fs_err(sdp
, "can't get resource index inode: %d\n", error
);
858 ip
= GFS2_I(sdp
->sd_rindex
);
859 sdp
->sd_rindex_uptodate
= 0;
861 /* Read in the quota inode */
862 sdp
->sd_quota_inode
= gfs2_lookup_simple(master
, "quota");
863 if (IS_ERR(sdp
->sd_quota_inode
)) {
864 error
= PTR_ERR(sdp
->sd_quota_inode
);
865 fs_err(sdp
, "can't get quota file inode: %d\n", error
);
871 iput(sdp
->sd_quota_inode
);
873 gfs2_clear_rgrpd(sdp
);
874 iput(sdp
->sd_rindex
);
876 iput(sdp
->sd_statfs_inode
);
878 iput(sdp
->sd_inum_inode
);
880 init_journal(sdp
, UNDO
);
885 static int init_per_node(struct gfs2_sbd
*sdp
, int undo
)
887 struct inode
*pn
= NULL
;
890 struct gfs2_inode
*ip
;
891 struct inode
*master
= sdp
->sd_master_dir
->d_inode
;
893 if (sdp
->sd_args
.ar_spectator
)
899 pn
= gfs2_lookup_simple(master
, "per_node");
902 fs_err(sdp
, "can't find per_node directory: %d\n", error
);
906 sprintf(buf
, "inum_range%u", sdp
->sd_jdesc
->jd_jid
);
907 sdp
->sd_ir_inode
= gfs2_lookup_simple(pn
, buf
);
908 if (IS_ERR(sdp
->sd_ir_inode
)) {
909 error
= PTR_ERR(sdp
->sd_ir_inode
);
910 fs_err(sdp
, "can't find local \"ir\" file: %d\n", error
);
914 sprintf(buf
, "statfs_change%u", sdp
->sd_jdesc
->jd_jid
);
915 sdp
->sd_sc_inode
= gfs2_lookup_simple(pn
, buf
);
916 if (IS_ERR(sdp
->sd_sc_inode
)) {
917 error
= PTR_ERR(sdp
->sd_sc_inode
);
918 fs_err(sdp
, "can't find local \"sc\" file: %d\n", error
);
922 sprintf(buf
, "quota_change%u", sdp
->sd_jdesc
->jd_jid
);
923 sdp
->sd_qc_inode
= gfs2_lookup_simple(pn
, buf
);
924 if (IS_ERR(sdp
->sd_qc_inode
)) {
925 error
= PTR_ERR(sdp
->sd_qc_inode
);
926 fs_err(sdp
, "can't find local \"qc\" file: %d\n", error
);
933 ip
= GFS2_I(sdp
->sd_ir_inode
);
934 error
= gfs2_glock_nq_init(ip
->i_gl
,
938 fs_err(sdp
, "can't lock local \"ir\" file: %d\n", error
);
942 ip
= GFS2_I(sdp
->sd_sc_inode
);
943 error
= gfs2_glock_nq_init(ip
->i_gl
,
947 fs_err(sdp
, "can't lock local \"sc\" file: %d\n", error
);
951 ip
= GFS2_I(sdp
->sd_qc_inode
);
952 error
= gfs2_glock_nq_init(ip
->i_gl
,
956 fs_err(sdp
, "can't lock local \"qc\" file: %d\n", error
);
963 gfs2_glock_dq_uninit(&sdp
->sd_qc_gh
);
965 gfs2_glock_dq_uninit(&sdp
->sd_sc_gh
);
967 gfs2_glock_dq_uninit(&sdp
->sd_ir_gh
);
969 iput(sdp
->sd_qc_inode
);
971 iput(sdp
->sd_sc_inode
);
973 iput(sdp
->sd_ir_inode
);
980 static int init_threads(struct gfs2_sbd
*sdp
, int undo
)
982 struct task_struct
*p
;
988 sdp
->sd_log_flush_time
= jiffies
;
990 p
= kthread_run(gfs2_logd
, sdp
, "gfs2_logd");
993 fs_err(sdp
, "can't start logd thread: %d\n", error
);
996 sdp
->sd_logd_process
= p
;
998 p
= kthread_run(gfs2_quotad
, sdp
, "gfs2_quotad");
1001 fs_err(sdp
, "can't start quotad thread: %d\n", error
);
1004 sdp
->sd_quotad_process
= p
;
1010 kthread_stop(sdp
->sd_quotad_process
);
1012 kthread_stop(sdp
->sd_logd_process
);
1016 static const match_table_t nolock_tokens
= {
1017 { Opt_jid
, "jid=%d\n", },
1021 static const struct lm_lockops nolock_ops
= {
1022 .lm_proto_name
= "lock_nolock",
1023 .lm_put_lock
= kmem_cache_free
,
1024 .lm_tokens
= &nolock_tokens
,
1028 * gfs2_lm_mount - mount a locking protocol
1029 * @sdp: the filesystem
1030 * @args: mount arguements
1031 * @silent: if 1, don't complain if the FS isn't a GFS2 fs
1036 static int gfs2_lm_mount(struct gfs2_sbd
*sdp
, int silent
)
1038 const struct lm_lockops
*lm
;
1039 struct lm_lockstruct
*ls
= &sdp
->sd_lockstruct
;
1040 struct gfs2_args
*args
= &sdp
->sd_args
;
1041 const char *proto
= sdp
->sd_proto_name
;
1042 const char *table
= sdp
->sd_table_name
;
1047 if (!strcmp("lock_nolock", proto
)) {
1049 sdp
->sd_args
.ar_localflocks
= 1;
1050 sdp
->sd_args
.ar_localcaching
= 1;
1051 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
1052 } else if (!strcmp("lock_dlm", proto
)) {
1056 printk(KERN_INFO
"GFS2: can't find protocol %s\n", proto
);
1060 fs_info(sdp
, "Trying to join cluster \"%s\", \"%s\"\n", proto
, table
);
1066 for (options
= args
->ar_hostdata
; (o
= strsep(&options
, ":")); ) {
1067 substring_t tmp
[MAX_OPT_ARGS
];
1073 token
= match_token(o
, *lm
->lm_tokens
, tmp
);
1076 ret
= match_int(&tmp
[0], &option
);
1077 if (ret
|| option
< 0)
1078 goto hostdata_error
;
1079 ls
->ls_jid
= option
;
1082 ret
= match_int(&tmp
[0], &option
);
1084 goto hostdata_error
;
1088 ret
= match_int(&tmp
[0], &option
);
1089 if (ret
|| (option
!= 0 && option
!= 1))
1090 goto hostdata_error
;
1091 ls
->ls_first
= option
;
1094 ret
= match_int(&tmp
[0], &option
);
1095 if (ret
|| (option
!= 0 && option
!= 1))
1096 goto hostdata_error
;
1097 ls
->ls_nodir
= option
;
1102 fs_info(sdp
, "unknown hostdata (%s)\n", o
);
1107 if (sdp
->sd_args
.ar_spectator
)
1108 snprintf(sdp
->sd_fsname
, GFS2_FSNAME_LEN
, "%s.s", table
);
1110 snprintf(sdp
->sd_fsname
, GFS2_FSNAME_LEN
, "%s.%u", table
,
1111 sdp
->sd_lockstruct
.ls_jid
);
1113 fsname
= strchr(table
, ':');
1116 if (lm
->lm_mount
== NULL
) {
1117 fs_info(sdp
, "Now mounting FS...\n");
1120 ret
= lm
->lm_mount(sdp
, fsname
);
1122 fs_info(sdp
, "Joined cluster. Now mounting FS...\n");
1126 void gfs2_lm_unmount(struct gfs2_sbd
*sdp
)
1128 const struct lm_lockops
*lm
= sdp
->sd_lockstruct
.ls_ops
;
1129 if (likely(!test_bit(SDF_SHUTDOWN
, &sdp
->sd_flags
)) &&
1131 lm
->lm_unmount(sdp
);
1135 * fill_super - Read in superblock
1136 * @sb: The VFS superblock
1137 * @data: Mount options
1138 * @silent: Don't complain if it's not a GFS2 filesystem
1143 static int fill_super(struct super_block
*sb
, void *data
, int silent
)
1145 struct gfs2_sbd
*sdp
;
1146 struct gfs2_holder mount_gh
;
1151 printk(KERN_WARNING
"GFS2: can't alloc struct gfs2_sbd\n");
1155 sdp
->sd_args
.ar_quota
= GFS2_QUOTA_DEFAULT
;
1156 sdp
->sd_args
.ar_data
= GFS2_DATA_DEFAULT
;
1157 sdp
->sd_args
.ar_commit
= 60;
1159 error
= gfs2_mount_args(sdp
, &sdp
->sd_args
, data
);
1161 printk(KERN_WARNING
"GFS2: can't parse mount arguments\n");
1165 if (sdp
->sd_args
.ar_spectator
) {
1166 sb
->s_flags
|= MS_RDONLY
;
1167 set_bit(SDF_NORECOVERY
, &sdp
->sd_flags
);
1169 if (sdp
->sd_args
.ar_posix_acl
)
1170 sb
->s_flags
|= MS_POSIXACL
;
1172 sb
->s_magic
= GFS2_MAGIC
;
1173 sb
->s_op
= &gfs2_super_ops
;
1174 sb
->s_export_op
= &gfs2_export_ops
;
1175 sb
->s_time_gran
= 1;
1176 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
1178 /* Set up the buffer cache and fill in some fake block size values
1179 to allow us to read-in the on-disk superblock. */
1180 sdp
->sd_sb
.sb_bsize
= sb_min_blocksize(sb
, GFS2_BASIC_BLOCK
);
1181 sdp
->sd_sb
.sb_bsize_shift
= sb
->s_blocksize_bits
;
1182 sdp
->sd_fsb2bb_shift
= sdp
->sd_sb
.sb_bsize_shift
-
1183 GFS2_BASIC_BLOCK_SHIFT
;
1184 sdp
->sd_fsb2bb
= 1 << sdp
->sd_fsb2bb_shift
;
1186 sdp
->sd_tune
.gt_log_flush_secs
= sdp
->sd_args
.ar_commit
;
1188 error
= init_names(sdp
, silent
);
1192 gfs2_create_debugfs_file(sdp
);
1194 error
= gfs2_sys_fs_add(sdp
);
1198 error
= gfs2_lm_mount(sdp
, silent
);
1202 error
= init_locking(sdp
, &mount_gh
, DO
);
1206 error
= init_sb(sdp
, silent
);
1210 error
= init_inodes(sdp
, DO
);
1214 error
= init_per_node(sdp
, DO
);
1218 error
= gfs2_statfs_init(sdp
);
1220 fs_err(sdp
, "can't initialize statfs subsystem: %d\n", error
);
1224 error
= init_threads(sdp
, DO
);
1228 if (!(sb
->s_flags
& MS_RDONLY
)) {
1229 error
= gfs2_make_fs_rw(sdp
);
1231 fs_err(sdp
, "can't make FS RW: %d\n", error
);
1236 gfs2_glock_dq_uninit(&mount_gh
);
1241 init_threads(sdp
, UNDO
);
1243 init_per_node(sdp
, UNDO
);
1245 init_inodes(sdp
, UNDO
);
1247 if (sdp
->sd_root_dir
)
1248 dput(sdp
->sd_root_dir
);
1249 if (sdp
->sd_master_dir
)
1250 dput(sdp
->sd_master_dir
);
1255 init_locking(sdp
, &mount_gh
, UNDO
);
1257 gfs2_gl_hash_clear(sdp
);
1258 gfs2_lm_unmount(sdp
);
1259 while (invalidate_inodes(sb
))
1262 gfs2_sys_fs_del(sdp
);
1264 gfs2_delete_debugfs_file(sdp
);
1266 sb
->s_fs_info
= NULL
;
1270 static int gfs2_get_sb(struct file_system_type
*fs_type
, int flags
,
1271 const char *dev_name
, void *data
, struct vfsmount
*mnt
)
1273 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, fill_super
, mnt
);
1276 static int test_meta_super(struct super_block
*s
, void *ptr
)
1278 struct block_device
*bdev
= ptr
;
1279 return (bdev
== s
->s_bdev
);
1282 static int set_meta_super(struct super_block
*s
, void *ptr
)
1287 static int gfs2_get_sb_meta(struct file_system_type
*fs_type
, int flags
,
1288 const char *dev_name
, void *data
, struct vfsmount
*mnt
)
1290 struct super_block
*s
;
1291 struct gfs2_sbd
*sdp
;
1295 error
= kern_path(dev_name
, LOOKUP_FOLLOW
, &path
);
1297 printk(KERN_WARNING
"GFS2: path_lookup on %s returned error %d\n",
1301 s
= sget(&gfs2_fs_type
, test_meta_super
, set_meta_super
,
1302 path
.dentry
->d_inode
->i_sb
->s_bdev
);
1305 printk(KERN_WARNING
"GFS2: gfs2 mount does not exist\n");
1310 mnt
->mnt_root
= dget(sdp
->sd_master_dir
);
1314 static void gfs2_kill_sb(struct super_block
*sb
)
1316 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1319 kill_block_super(sb
);
1323 gfs2_meta_syncfs(sdp
);
1324 dput(sdp
->sd_root_dir
);
1325 dput(sdp
->sd_master_dir
);
1326 sdp
->sd_root_dir
= NULL
;
1327 sdp
->sd_master_dir
= NULL
;
1328 shrink_dcache_sb(sb
);
1329 kill_block_super(sb
);
1330 gfs2_delete_debugfs_file(sdp
);
1334 struct file_system_type gfs2_fs_type
= {
1336 .fs_flags
= FS_REQUIRES_DEV
,
1337 .get_sb
= gfs2_get_sb
,
1338 .kill_sb
= gfs2_kill_sb
,
1339 .owner
= THIS_MODULE
,
1342 struct file_system_type gfs2meta_fs_type
= {
1344 .fs_flags
= FS_REQUIRES_DEV
,
1345 .get_sb
= gfs2_get_sb_meta
,
1346 .owner
= THIS_MODULE
,