1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * load/unload driver, mount/dismount volumes
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
26 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/utsname.h>
32 #include <linux/init.h>
33 #include <linux/random.h>
34 #include <linux/statfs.h>
35 #include <linux/moduleparam.h>
36 #include <linux/blkdev.h>
37 #include <linux/socket.h>
38 #include <linux/inet.h>
39 #include <linux/parser.h>
40 #include <linux/crc32.h>
41 #include <linux/debugfs.h>
43 #include <cluster/nodemanager.h>
45 #define MLOG_MASK_PREFIX ML_SUPER
46 #include <cluster/masklog.h>
50 /* this should be the only file to include a version 1 header */
51 #include "ocfs1_fs_compat.h"
56 #include "extent_map.h"
57 #include "heartbeat.h"
60 #include "localalloc.h"
69 #include "buffer_head_io.h"
71 static kmem_cache_t *ocfs2_inode_cachep = NULL;
73 /* OCFS2 needs to schedule several differnt types of work which
74 * require cluster locking, disk I/O, recovery waits, etc. Since these
75 * types of work tend to be heavy we avoid using the kernel events
76 * workqueue and schedule on our own. */
77 struct workqueue_struct *ocfs2_wq = NULL;
79 static struct dentry *ocfs2_debugfs_root = NULL;
81 MODULE_AUTHOR("Oracle");
82 MODULE_LICENSE("GPL");
84 static int ocfs2_parse_options(struct super_block *sb, char *options,
85 unsigned long *mount_opt, int is_remount);
86 static void ocfs2_put_super(struct super_block *sb);
87 static int ocfs2_mount_volume(struct super_block *sb);
88 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
89 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
90 static int ocfs2_initialize_mem_caches(void);
91 static void ocfs2_free_mem_caches(void);
92 static void ocfs2_delete_osb(struct ocfs2_super *osb);
94 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
96 static int ocfs2_sync_fs(struct super_block *sb, int wait);
98 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
99 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
100 static int ocfs2_release_system_inodes(struct ocfs2_super *osb);
101 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb);
102 static int ocfs2_check_volume(struct ocfs2_super *osb);
103 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
104 struct buffer_head *bh,
106 static int ocfs2_initialize_super(struct super_block *sb,
107 struct buffer_head *bh,
109 static int ocfs2_get_sector(struct super_block *sb,
110 struct buffer_head **bh,
113 static void ocfs2_write_super(struct super_block *sb);
114 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
115 static void ocfs2_destroy_inode(struct inode *inode);
117 static unsigned long long ocfs2_max_file_offset(unsigned int blockshift);
119 static struct super_operations ocfs2_sops = {
120 .statfs = ocfs2_statfs,
121 .alloc_inode = ocfs2_alloc_inode,
122 .destroy_inode = ocfs2_destroy_inode,
123 .drop_inode = ocfs2_drop_inode,
124 .clear_inode = ocfs2_clear_inode,
125 .delete_inode = ocfs2_delete_inode,
126 .sync_fs = ocfs2_sync_fs,
127 .write_super = ocfs2_write_super,
128 .put_super = ocfs2_put_super,
129 .remount_fs = ocfs2_remount,
146 static match_table_t tokens = {
147 {Opt_barrier, "barrier=%u"},
148 {Opt_err_panic, "errors=panic"},
149 {Opt_err_ro, "errors=remount-ro"},
151 {Opt_nointr, "nointr"},
152 {Opt_hb_none, OCFS2_HB_NONE},
153 {Opt_hb_local, OCFS2_HB_LOCAL},
154 {Opt_data_ordered, "data=ordered"},
155 {Opt_data_writeback, "data=writeback"},
156 {Opt_atime_quantum, "atime_quantum=%u"},
161 * write_super and sync_fs ripped right out of ext3.
163 static void ocfs2_write_super(struct super_block *sb)
165 if (mutex_trylock(&sb->s_lock) != 0)
170 static int ocfs2_sync_fs(struct super_block *sb, int wait)
174 struct ocfs2_super *osb = OCFS2_SB(sb);
178 if (ocfs2_is_hard_readonly(osb))
182 status = ocfs2_flush_truncate_log(osb);
186 ocfs2_schedule_truncate_log_flush(osb, 0);
189 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) {
191 log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
197 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
199 struct inode *new = NULL;
205 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE);
207 status = PTR_ERR(new);
211 osb->root_inode = new;
213 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE);
215 status = PTR_ERR(new);
219 osb->sys_root_inode = new;
221 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
222 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
223 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
225 ocfs2_release_system_inodes(osb);
228 /* FIXME: Should ERROR_RO_FS */
229 mlog(ML_ERROR, "Unable to load system inode %d, "
230 "possibly corrupt fs?", i);
233 // the array now has one ref, so drop this one
242 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
244 struct inode *new = NULL;
250 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
251 i < NUM_SYSTEM_INODES;
253 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
255 ocfs2_release_system_inodes(osb);
257 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
258 status, i, osb->slot_num);
261 /* the array now has one ref, so drop this one */
270 static int ocfs2_release_system_inodes(struct ocfs2_super *osb)
277 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
278 inode = osb->system_inodes[i];
281 osb->system_inodes[i] = NULL;
285 inode = osb->sys_root_inode;
288 osb->sys_root_inode = NULL;
291 inode = osb->root_inode;
294 osb->root_inode = NULL;
301 /* We're allocating fs objects, use GFP_NOFS */
302 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
304 struct ocfs2_inode_info *oi;
306 oi = kmem_cache_alloc(ocfs2_inode_cachep, SLAB_NOFS);
310 return &oi->vfs_inode;
313 static void ocfs2_destroy_inode(struct inode *inode)
315 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
318 /* From xfs_super.c:xfs_max_file_offset
319 * Copyright (c) 2000-2004 Silicon Graphics, Inc.
321 static unsigned long long ocfs2_max_file_offset(unsigned int blockshift)
323 unsigned int pagefactor = 1;
324 unsigned int bitshift = BITS_PER_LONG - 1;
326 /* Figure out maximum filesize, on Linux this can depend on
327 * the filesystem blocksize (on 32 bit platforms).
328 * __block_prepare_write does this in an [unsigned] long...
329 * page->index << (PAGE_CACHE_SHIFT - bbits)
330 * So, for page sized blocks (4K on 32 bit platforms),
331 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
332 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
333 * but for smaller blocksizes it is less (bbits = log2 bsize).
334 * Note1: get_block_t takes a long (implicit cast from above)
335 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
336 * can optionally convert the [unsigned] long from above into
337 * an [unsigned] long long.
340 #if BITS_PER_LONG == 32
341 # if defined(CONFIG_LBD)
342 BUILD_BUG_ON(sizeof(sector_t) != 8);
343 pagefactor = PAGE_CACHE_SIZE;
344 bitshift = BITS_PER_LONG;
346 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
350 return (((unsigned long long)pagefactor) << bitshift) - 1;
353 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
355 int incompat_features;
357 unsigned long parsed_options;
358 struct ocfs2_super *osb = OCFS2_SB(sb);
360 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
365 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
366 (parsed_options & OCFS2_MOUNT_HB_LOCAL)) {
368 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
372 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
373 (parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) {
375 mlog(ML_ERROR, "Cannot change data mode on remount\n");
379 /* We're going to/from readonly mode. */
380 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
381 /* Lock here so the check of HARD_RO and the potential
382 * setting of SOFT_RO is atomic. */
383 spin_lock(&osb->osb_lock);
384 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
385 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
390 if (*flags & MS_RDONLY) {
391 mlog(0, "Going to ro mode.\n");
392 sb->s_flags |= MS_RDONLY;
393 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
395 mlog(0, "Making ro filesystem writeable.\n");
397 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
398 mlog(ML_ERROR, "Cannot remount RDWR "
399 "filesystem due to previous errors.\n");
403 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
404 if (incompat_features) {
405 mlog(ML_ERROR, "Cannot remount RDWR because "
406 "of unsupported optional features "
407 "(%x).\n", incompat_features);
411 sb->s_flags &= ~MS_RDONLY;
412 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
415 spin_unlock(&osb->osb_lock);
419 if (!ocfs2_is_hard_readonly(osb))
420 ocfs2_set_journal_params(osb);
422 /* Only save off the new mount options in case of a successful
424 osb->s_mount_opt = parsed_options;
430 static int ocfs2_sb_probe(struct super_block *sb,
431 struct buffer_head **bh,
434 int status = 0, tmpstat;
435 struct ocfs1_vol_disk_hdr *hdr;
436 struct ocfs2_dinode *di;
442 *sector_size = bdev_hardsect_size(sb->s_bdev);
443 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
444 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
445 *sector_size, OCFS2_MAX_BLOCKSIZE);
450 /* Can this really happen? */
451 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
452 *sector_size = OCFS2_MIN_BLOCKSIZE;
454 /* check block zero for old format */
455 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
460 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
461 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
462 mlog(ML_ERROR, "incompatible version: %u.%u\n",
463 hdr->major_version, hdr->minor_version);
466 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
467 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
468 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
475 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
476 "upgraded before mounting with ocfs v2\n");
481 * Now check at magic offset for 512, 1024, 2048, 4096
482 * blocksizes. 4096 is the maximum blocksize because it is
483 * the minimum clustersize.
486 for (blksize = *sector_size;
487 blksize <= OCFS2_MAX_BLOCKSIZE;
489 tmpstat = ocfs2_get_sector(sb, bh,
490 OCFS2_SUPER_BLOCK_BLKNO,
497 di = (struct ocfs2_dinode *) (*bh)->b_data;
498 status = ocfs2_verify_volume(di, *bh, blksize);
503 if (status != -EAGAIN)
511 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
514 int status, sector_size;
515 unsigned long parsed_opt;
516 struct inode *inode = NULL;
517 struct ocfs2_super *osb = NULL;
518 struct buffer_head *bh = NULL;
520 mlog_entry("%p, %p, %i", sb, data, silent);
522 /* for now we only have one cluster/node, make sure we see it
523 * in the heartbeat universe */
524 if (!o2hb_check_local_node_heartbeating()) {
526 goto read_super_error;
529 /* probe for superblock */
530 status = ocfs2_sb_probe(sb, &bh, §or_size);
532 mlog(ML_ERROR, "superblock probe failed!\n");
533 goto read_super_error;
536 status = ocfs2_initialize_super(sb, bh, sector_size);
540 goto read_super_error;
545 if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) {
547 goto read_super_error;
549 osb->s_mount_opt = parsed_opt;
551 sb->s_magic = OCFS2_SUPER_MAGIC;
553 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
555 if (bdev_read_only(sb->s_bdev)) {
556 if (!(sb->s_flags & MS_RDONLY)) {
558 mlog(ML_ERROR, "Readonly device detected but readonly "
559 "mount was not specified.\n");
560 goto read_super_error;
563 /* You should not be able to start a local heartbeat
564 * on a readonly device. */
565 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
567 mlog(ML_ERROR, "Local heartbeat specified on readonly "
569 goto read_super_error;
572 status = ocfs2_check_journals_nolocks(osb);
574 if (status == -EROFS)
575 mlog(ML_ERROR, "Recovery required on readonly "
576 "file system, but write access is "
580 goto read_super_error;
583 ocfs2_set_ro_flag(osb, 1);
585 printk(KERN_NOTICE "Readonly device detected. No cluster "
586 "services will be utilized for this mount. Recovery "
587 "will be skipped.\n");
590 if (!ocfs2_is_hard_readonly(osb)) {
591 /* If this isn't a hard readonly mount, then we need
592 * to make sure that heartbeat is in a valid state,
593 * and that we mark ourselves soft readonly is -oro
595 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
596 mlog(ML_ERROR, "No heartbeat for device (%s)\n",
599 goto read_super_error;
602 if (sb->s_flags & MS_RDONLY)
603 ocfs2_set_ro_flag(osb, 0);
606 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
608 if (!osb->osb_debug_root) {
610 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
611 goto read_super_error;
614 status = ocfs2_mount_volume(sb);
616 inode = igrab(osb->root_inode);
619 goto read_super_error;
624 goto read_super_error;
627 root = d_alloc_root(inode);
631 goto read_super_error;
636 ocfs2_complete_mount_recovery(osb);
638 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %d, slot %d) "
639 "with %s data mode.\n",
640 osb->dev_str, osb->node_num, osb->slot_num,
641 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
644 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
645 wake_up(&osb->osb_mount_event);
658 atomic_set(&osb->vol_state, VOLUME_DISABLED);
659 wake_up(&osb->osb_mount_event);
660 ocfs2_dismount_volume(sb, 1);
667 static int ocfs2_get_sb(struct file_system_type *fs_type,
669 const char *dev_name,
671 struct vfsmount *mnt)
673 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
677 static struct file_system_type ocfs2_fs_type = {
678 .owner = THIS_MODULE,
680 .get_sb = ocfs2_get_sb, /* is this called when we mount
682 .kill_sb = kill_block_super, /* set to the generic one
683 * right now, but do we
684 * need to change that? */
685 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
689 static int ocfs2_parse_options(struct super_block *sb,
691 unsigned long *mount_opt,
697 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
698 options ? options : "(none)");
707 while ((p = strsep(&options, ",")) != NULL) {
709 substring_t args[MAX_OPT_ARGS];
710 struct ocfs2_super * osb = OCFS2_SB(sb);
715 token = match_token(p, tokens, args);
718 *mount_opt |= OCFS2_MOUNT_HB_LOCAL;
721 *mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
724 if (match_int(&args[0], &option)) {
729 *mount_opt |= OCFS2_MOUNT_BARRIER;
731 *mount_opt &= ~OCFS2_MOUNT_BARRIER;
734 *mount_opt &= ~OCFS2_MOUNT_NOINTR;
737 *mount_opt |= OCFS2_MOUNT_NOINTR;
740 *mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
743 *mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
745 case Opt_data_ordered:
746 *mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
748 case Opt_data_writeback:
749 *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
751 case Opt_atime_quantum:
752 if (match_int(&args[0], &option)) {
757 osb->s_atime_quantum = option;
759 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
763 "Unrecognized mount option \"%s\" "
764 "or missing value\n", p);
777 static int __init ocfs2_init(void)
783 ocfs2_print_version();
785 if (init_ocfs2_extent_maps())
788 status = init_ocfs2_uptodate_cache();
794 status = ocfs2_initialize_mem_caches();
800 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
806 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
807 if (!ocfs2_debugfs_root) {
809 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
814 ocfs2_free_mem_caches();
815 exit_ocfs2_uptodate_cache();
816 exit_ocfs2_extent_maps();
822 return register_filesystem(&ocfs2_fs_type);
827 static void __exit ocfs2_exit(void)
832 flush_workqueue(ocfs2_wq);
833 destroy_workqueue(ocfs2_wq);
836 debugfs_remove(ocfs2_debugfs_root);
838 ocfs2_free_mem_caches();
840 unregister_filesystem(&ocfs2_fs_type);
842 exit_ocfs2_extent_maps();
844 exit_ocfs2_uptodate_cache();
849 static void ocfs2_put_super(struct super_block *sb)
851 mlog_entry("(0x%p)\n", sb);
853 ocfs2_sync_blockdev(sb);
854 ocfs2_dismount_volume(sb, 0);
859 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
861 struct ocfs2_super *osb;
862 u32 numbits, freebits;
864 struct ocfs2_dinode *bm_lock;
865 struct buffer_head *bh = NULL;
866 struct inode *inode = NULL;
868 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
870 osb = OCFS2_SB(dentry->d_sb);
872 inode = ocfs2_get_system_file_inode(osb,
873 GLOBAL_BITMAP_SYSTEM_INODE,
876 mlog(ML_ERROR, "failed to get bitmap inode\n");
881 status = ocfs2_meta_lock(inode, &bh, 0);
887 bm_lock = (struct ocfs2_dinode *) bh->b_data;
889 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
890 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
892 buf->f_type = OCFS2_SUPER_MAGIC;
893 buf->f_bsize = dentry->d_sb->s_blocksize;
894 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
895 buf->f_blocks = ((sector_t) numbits) *
896 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
897 buf->f_bfree = ((sector_t) freebits) *
898 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
899 buf->f_bavail = buf->f_bfree;
900 buf->f_files = numbits;
901 buf->f_ffree = freebits;
905 ocfs2_meta_unlock(inode, 0);
916 static void ocfs2_inode_init_once(void *data,
917 kmem_cache_t *cachep,
920 struct ocfs2_inode_info *oi = data;
922 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
923 SLAB_CTOR_CONSTRUCTOR) {
925 oi->ip_open_count = 0;
926 spin_lock_init(&oi->ip_lock);
927 ocfs2_extent_map_init(&oi->vfs_inode);
928 INIT_LIST_HEAD(&oi->ip_io_markers);
929 oi->ip_created_trans = 0;
930 oi->ip_last_trans = 0;
931 oi->ip_dir_start_lookup = 0;
933 init_rwsem(&oi->ip_alloc_sem);
934 mutex_init(&oi->ip_io_mutex);
939 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
940 ocfs2_lock_res_init_once(&oi->ip_meta_lockres);
941 ocfs2_lock_res_init_once(&oi->ip_data_lockres);
943 ocfs2_metadata_cache_init(&oi->vfs_inode);
945 inode_init_once(&oi->vfs_inode);
949 static int ocfs2_initialize_mem_caches(void)
951 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
952 sizeof(struct ocfs2_inode_info),
954 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
956 ocfs2_inode_init_once, NULL);
957 if (!ocfs2_inode_cachep)
963 static void ocfs2_free_mem_caches(void)
965 if (ocfs2_inode_cachep)
966 kmem_cache_destroy(ocfs2_inode_cachep);
968 ocfs2_inode_cachep = NULL;
971 static int ocfs2_get_sector(struct super_block *sb,
972 struct buffer_head **bh,
976 if (!sb_set_blocksize(sb, sect_size)) {
977 mlog(ML_ERROR, "unable to set blocksize\n");
981 *bh = sb_getblk(sb, block);
987 if (!buffer_dirty(*bh))
988 clear_buffer_uptodate(*bh);
990 ll_rw_block(READ, 1, bh);
995 /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */
996 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb)
1000 /* XXX hold a ref on the node while mounte? easy enough, if
1002 osb->node_num = o2nm_this_node();
1003 if (osb->node_num == O2NM_MAX_NODES) {
1004 mlog(ML_ERROR, "could not find this host's node number\n");
1009 mlog(0, "I am node %d\n", osb->node_num);
1016 static int ocfs2_mount_volume(struct super_block *sb)
1019 int unlock_super = 0;
1020 struct ocfs2_super *osb = OCFS2_SB(sb);
1024 if (ocfs2_is_hard_readonly(osb))
1027 status = ocfs2_fill_local_node_info(osb);
1033 status = ocfs2_register_hb_callbacks(osb);
1039 status = ocfs2_dlm_init(osb);
1045 /* requires vote_thread to be running. */
1046 status = ocfs2_register_net_handlers(osb);
1052 status = ocfs2_super_lock(osb, 1);
1059 /* This will load up the node map and add ourselves to it. */
1060 status = ocfs2_find_slot(osb);
1066 ocfs2_populate_mounted_map(osb);
1068 /* load all node-local system inodes */
1069 status = ocfs2_init_local_system_inodes(osb);
1075 status = ocfs2_check_volume(osb);
1081 status = ocfs2_truncate_log_init(osb);
1087 /* This should be sent *after* we recovered our journal as it
1088 * will cause other nodes to unmark us as needing
1089 * recovery. However, we need to send it *before* dropping the
1090 * super block lock as otherwise their recovery threads might
1091 * try to clean us up while we're live! */
1092 status = ocfs2_request_mount_vote(osb);
1098 ocfs2_super_unlock(osb, 1);
1104 /* we can't grab the goofy sem lock from inside wait_event, so we use
1105 * memory barriers to make sure that we'll see the null task before
1107 static int ocfs2_recovery_thread_running(struct ocfs2_super *osb)
1110 return osb->recovery_thread_task != NULL;
1113 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1116 struct ocfs2_super *osb = NULL;
1118 mlog_entry("(0x%p)\n", sb);
1124 ocfs2_shutdown_local_alloc(osb);
1126 ocfs2_truncate_log_shutdown(osb);
1128 /* disable any new recovery threads and wait for any currently
1129 * running ones to exit. Do this before setting the vol_state. */
1130 mutex_lock(&osb->recovery_lock);
1131 osb->disable_recovery = 1;
1132 mutex_unlock(&osb->recovery_lock);
1133 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb));
1135 /* At this point, we know that no more recovery threads can be
1136 * launched, so wait for any recovery completion work to
1138 flush_workqueue(ocfs2_wq);
1140 ocfs2_journal_shutdown(osb);
1142 ocfs2_sync_blockdev(sb);
1144 /* No dlm means we've failed during mount, so skip all the
1145 * steps which depended on that to complete. */
1147 tmp = ocfs2_super_lock(osb, 1);
1153 tmp = ocfs2_request_umount_vote(osb);
1157 if (osb->slot_num != OCFS2_INVALID_SLOT)
1158 ocfs2_put_slot(osb);
1160 ocfs2_super_unlock(osb, 1);
1163 ocfs2_release_system_inodes(osb);
1166 ocfs2_unregister_net_handlers(osb);
1168 ocfs2_dlm_shutdown(osb);
1171 ocfs2_clear_hb_callbacks(osb);
1173 debugfs_remove(osb->osb_debug_root);
1176 ocfs2_stop_heartbeat(osb);
1178 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1180 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %d)\n",
1181 osb->dev_str, osb->node_num);
1183 ocfs2_delete_osb(osb);
1186 sb->s_fs_info = NULL;
1189 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1190 unsigned uuid_bytes)
1195 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1197 osb->uuid_str = kcalloc(1, OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1198 if (osb->uuid_str == NULL)
1201 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1202 /* print with null */
1203 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1204 if (ret != 2) /* drop super cleans up */
1206 /* then only advance past the last char */
1213 static int ocfs2_initialize_super(struct super_block *sb,
1214 struct buffer_head *bh,
1219 struct ocfs2_dinode *di = NULL;
1220 struct inode *inode = NULL;
1221 struct buffer_head *bitmap_bh = NULL;
1222 struct ocfs2_journal *journal;
1223 __le32 uuid_net_key;
1224 struct ocfs2_super *osb;
1228 osb = kcalloc(1, sizeof(struct ocfs2_super), GFP_KERNEL);
1235 sb->s_fs_info = osb;
1236 sb->s_op = &ocfs2_sops;
1237 sb->s_export_op = &ocfs2_export_ops;
1238 sb->s_flags |= MS_NOATIME;
1239 /* this is needed to support O_LARGEFILE */
1240 sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits);
1243 /* Save off for ocfs2_rw_direct */
1244 osb->s_sectsize_bits = blksize_bits(sector_size);
1245 BUG_ON(!osb->s_sectsize_bits);
1247 osb->net_response_ids = 0;
1248 spin_lock_init(&osb->net_response_lock);
1249 INIT_LIST_HEAD(&osb->net_response_list);
1251 INIT_LIST_HEAD(&osb->osb_net_handlers);
1252 init_waitqueue_head(&osb->recovery_event);
1253 spin_lock_init(&osb->vote_task_lock);
1254 init_waitqueue_head(&osb->vote_event);
1255 osb->vote_work_sequence = 0;
1256 osb->vote_wake_sequence = 0;
1257 INIT_LIST_HEAD(&osb->blocked_lock_list);
1258 osb->blocked_lock_count = 0;
1259 INIT_LIST_HEAD(&osb->vote_list);
1260 spin_lock_init(&osb->osb_lock);
1262 atomic_set(&osb->alloc_stats.moves, 0);
1263 atomic_set(&osb->alloc_stats.local_data, 0);
1264 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1265 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1266 atomic_set(&osb->alloc_stats.bg_extends, 0);
1268 ocfs2_init_node_maps(osb);
1270 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1271 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1273 mutex_init(&osb->recovery_lock);
1275 osb->disable_recovery = 0;
1276 osb->recovery_thread_task = NULL;
1278 init_waitqueue_head(&osb->checkpoint_event);
1279 atomic_set(&osb->needs_checkpoint, 0);
1281 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1283 osb->node_num = O2NM_INVALID_NODE_NUM;
1284 osb->slot_num = OCFS2_INVALID_SLOT;
1286 osb->local_alloc_state = OCFS2_LA_UNUSED;
1287 osb->local_alloc_bh = NULL;
1289 ocfs2_setup_hb_callbacks(osb);
1291 init_waitqueue_head(&osb->osb_mount_event);
1293 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1294 if (!osb->vol_label) {
1295 mlog(ML_ERROR, "unable to alloc vol label\n");
1300 di = (struct ocfs2_dinode *)bh->b_data;
1302 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1303 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1304 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1309 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
1311 init_waitqueue_head(&osb->osb_wipe_event);
1312 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1313 sizeof(*osb->osb_orphan_wipes),
1315 if (!osb->osb_orphan_wipes) {
1321 osb->s_feature_compat =
1322 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1323 osb->s_feature_ro_compat =
1324 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1325 osb->s_feature_incompat =
1326 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1328 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1329 mlog(ML_ERROR, "couldn't mount because of unsupported "
1330 "optional features (%x).\n", i);
1334 if (!(osb->sb->s_flags & MS_RDONLY) &&
1335 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1336 mlog(ML_ERROR, "couldn't mount RDWR because of "
1337 "unsupported optional features (%x).\n", i);
1342 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1345 * This should be done in ocfs2_journal_init(), but unknown
1346 * ordering issues will cause the filesystem to crash.
1347 * If anyone wants to figure out what part of the code
1348 * refers to osb->journal before ocfs2_journal_init() is run,
1351 /* initialize our journal structure */
1353 journal = kcalloc(1, sizeof(struct ocfs2_journal), GFP_KERNEL);
1355 mlog(ML_ERROR, "unable to alloc journal\n");
1359 osb->journal = journal;
1360 journal->j_osb = osb;
1362 atomic_set(&journal->j_num_trans, 0);
1363 init_rwsem(&journal->j_trans_barrier);
1364 init_waitqueue_head(&journal->j_checkpointed);
1365 spin_lock_init(&journal->j_lock);
1366 journal->j_trans_id = (unsigned long) 1;
1367 INIT_LIST_HEAD(&journal->j_la_cleanups);
1368 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
1369 journal->j_state = OCFS2_JOURNAL_FREE;
1371 /* get some pseudo constants for clustersize bits */
1372 osb->s_clustersize_bits =
1373 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1374 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1375 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1377 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1378 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1379 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1380 osb->s_clustersize);
1385 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1387 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1388 "what jbd can address in 32 bits.\n");
1393 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1394 sizeof(di->id2.i_super.s_uuid))) {
1395 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1400 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
1401 osb->net_key = le32_to_cpu(uuid_net_key);
1403 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1404 osb->vol_label[63] = '\0';
1405 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1406 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1407 osb->first_cluster_group_blkno =
1408 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1409 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1410 mlog(0, "vol_label: %s\n", osb->vol_label);
1411 mlog(0, "uuid: %s\n", osb->uuid_str);
1412 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1413 (unsigned long long)osb->root_blkno,
1414 (unsigned long long)osb->system_dir_blkno);
1416 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1417 if (!osb->osb_dlm_debug) {
1423 atomic_set(&osb->vol_state, VOLUME_INIT);
1425 /* load root, system_dir, and all global system inodes */
1426 status = ocfs2_init_global_system_inodes(osb);
1435 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1436 OCFS2_INVALID_SLOT);
1443 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
1445 /* We don't have a cluster lock on the bitmap here because
1446 * we're only interested in static information and the extra
1447 * complexity at mount time isn't worht it. Don't pass the
1448 * inode in to the read function though as we don't want it to
1449 * be put in the cache. */
1450 status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0,
1458 di = (struct ocfs2_dinode *) bitmap_bh->b_data;
1459 osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg);
1461 mlog(0, "cluster bitmap inode: %llu, clusters per group: %u\n",
1462 (unsigned long long)osb->bitmap_blkno, osb->bitmap_cpg);
1464 status = ocfs2_init_slot_info(osb);
1476 * will return: -EAGAIN if it is ok to keep searching for superblocks
1477 * -EINVAL if there is a bad superblock
1480 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1481 struct buffer_head *bh,
1484 int status = -EAGAIN;
1488 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1489 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1491 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1492 mlog(ML_ERROR, "found superblock with incorrect block "
1493 "size: found %u, should be %u\n",
1494 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1496 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1497 OCFS2_MAJOR_REV_LEVEL ||
1498 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1499 OCFS2_MINOR_REV_LEVEL) {
1500 mlog(ML_ERROR, "found superblock with bad version: "
1501 "found %u.%u, should be %u.%u\n",
1502 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1503 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1504 OCFS2_MAJOR_REV_LEVEL,
1505 OCFS2_MINOR_REV_LEVEL);
1506 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1507 mlog(ML_ERROR, "bad block number on superblock: "
1508 "found %llu, should be %llu\n",
1509 (unsigned long long)di->i_blkno,
1510 (unsigned long long)bh->b_blocknr);
1511 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1512 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1513 mlog(ML_ERROR, "bad cluster size found: %u\n",
1514 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1515 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1516 mlog(ML_ERROR, "bad root_blkno: 0\n");
1517 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1518 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1519 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1521 "Superblock slots found greater than file system "
1522 "maximum: found %u, max %u\n",
1523 le16_to_cpu(di->id2.i_super.s_max_slots),
1535 static int ocfs2_check_volume(struct ocfs2_super *osb)
1539 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1545 /* Init our journal object. */
1546 status = ocfs2_journal_init(osb->journal, &dirty);
1548 mlog(ML_ERROR, "Could not initialize journal!\n");
1552 /* If the journal was unmounted cleanly then we don't want to
1553 * recover anything. Otherwise, journal_load will do that
1554 * dirty work for us :) */
1556 status = ocfs2_journal_wipe(osb->journal, 0);
1562 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1563 "recovering volume.\n");
1566 /* will play back anything left in the journal. */
1567 ocfs2_journal_load(osb->journal);
1570 /* recover my local alloc if we didn't unmount cleanly. */
1571 status = ocfs2_begin_local_alloc_recovery(osb,
1578 /* we complete the recovery process after we've marked
1579 * ourselves as mounted. */
1582 mlog(0, "Journal loaded.\n");
1584 status = ocfs2_load_local_alloc(osb);
1591 /* Recovery will be completed after we've mounted the
1592 * rest of the volume. */
1594 osb->local_alloc_copy = local_alloc;
1598 /* go through each journal, trylock it and if you get the
1599 * lock, and it's marked as dirty, set the bit in the recover
1600 * map and launch a recovery thread for it. */
1601 status = ocfs2_mark_dead_nodes(osb);
1614 * The routine gets called from dismount or close whenever a dismount on
1615 * volume is requested and the osb open count becomes 1.
1616 * It will remove the osb from the global list and also free up all the
1617 * initialized resources and fileobject.
1619 static void ocfs2_delete_osb(struct ocfs2_super *osb)
1623 /* This function assumes that the caller has the main osb resource */
1626 ocfs2_free_slot_info(osb->slot_info);
1628 kfree(osb->osb_orphan_wipes);
1630 * This belongs in journal shutdown, but because we have to
1631 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1634 kfree(osb->journal);
1635 if (osb->local_alloc_copy)
1636 kfree(osb->local_alloc_copy);
1637 kfree(osb->uuid_str);
1638 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1639 memset(osb, 0, sizeof(struct ocfs2_super));
1644 /* Put OCFS2 into a readonly state, or (if the user specifies it),
1645 * panic(). We do not support continue-on-error operation. */
1646 static void ocfs2_handle_error(struct super_block *sb)
1648 struct ocfs2_super *osb = OCFS2_SB(sb);
1650 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1651 panic("OCFS2: (device %s): panic forced after error\n",
1654 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1656 if (sb->s_flags & MS_RDONLY &&
1657 (ocfs2_is_soft_readonly(osb) ||
1658 ocfs2_is_hard_readonly(osb)))
1661 printk(KERN_CRIT "File system is now read-only due to the potential "
1662 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1663 "system is unmounted.\n");
1664 sb->s_flags |= MS_RDONLY;
1665 ocfs2_set_ro_flag(osb, 0);
1668 static char error_buf[1024];
1670 void __ocfs2_error(struct super_block *sb,
1671 const char *function,
1672 const char *fmt, ...)
1676 va_start(args, fmt);
1677 vsprintf(error_buf, fmt, args);
1680 /* Not using mlog here because we want to show the actual
1681 * function the error came from. */
1682 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1683 sb->s_id, function, error_buf);
1685 ocfs2_handle_error(sb);
1688 /* Handle critical errors. This is intentionally more drastic than
1689 * ocfs2_handle_error, so we only use for things like journal errors,
1691 void __ocfs2_abort(struct super_block* sb,
1692 const char *function,
1693 const char *fmt, ...)
1697 va_start(args, fmt);
1698 vsprintf(error_buf, fmt, args);
1701 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1702 sb->s_id, function, error_buf);
1704 /* We don't have the cluster support yet to go straight to
1705 * hard readonly in here. Until then, we want to keep
1706 * ocfs2_abort() so that we can at least mark critical
1709 * TODO: This should abort the journal and alert other nodes
1710 * that our slot needs recovery. */
1712 /* Force a panic(). This stinks, but it's better than letting
1713 * things continue without having a proper hard readonly
1715 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1716 ocfs2_handle_error(sb);
1719 module_init(ocfs2_init);
1720 module_exit(ocfs2_exit);