diff options
Diffstat (limited to 'fs/ocfs2/super.c')
| -rw-r--r-- | fs/ocfs2/super.c | 1733 |
1 files changed, 1733 insertions, 0 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c new file mode 100644 index 000000000000..364d64bd5f10 --- /dev/null +++ b/fs/ocfs2/super.c @@ -0,0 +1,1733 @@ +/* -*- mode: c; c-basic-offset: 8; -*- + * vim: noexpandtab sw=8 ts=8 sts=0: + * + * super.c + * + * load/unload driver, mount/dismount volumes + * + * Copyright (C) 2002, 2004 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#include <linux/module.h> +#include <linux/fs.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/highmem.h> +#include <linux/utsname.h> +#include <linux/init.h> +#include <linux/random.h> +#include <linux/statfs.h> +#include <linux/moduleparam.h> +#include <linux/blkdev.h> +#include <linux/socket.h> +#include <linux/inet.h> +#include <linux/parser.h> +#include <linux/crc32.h> +#include <linux/debugfs.h> + +#include <cluster/nodemanager.h> + +#define MLOG_MASK_PREFIX ML_SUPER +#include <cluster/masklog.h> + +#include "ocfs2.h" + +/* this should be the only file to include a version 1 header */ +#include "ocfs1_fs_compat.h" + +#include "alloc.h" +#include "dlmglue.h" +#include "export.h" +#include "extent_map.h" +#include "heartbeat.h" +#include "inode.h" +#include "journal.h" +#include "localalloc.h" +#include "namei.h" +#include "slot_map.h" +#include "super.h" +#include "sysfile.h" +#include "uptodate.h" +#include "ver.h" +#include "vote.h" + +#include "buffer_head_io.h" + +/* + * Globals + */ +static spinlock_t ocfs2_globals_lock = SPIN_LOCK_UNLOCKED; + +static u32 osb_id; /* Keeps track of next available OSB Id */ + +static kmem_cache_t *ocfs2_inode_cachep = NULL; + +kmem_cache_t *ocfs2_lock_cache = NULL; + +/* OCFS2 needs to schedule several differnt types of work which + * require cluster locking, disk I/O, recovery waits, etc. Since these + * types of work tend to be heavy we avoid using the kernel events + * workqueue and schedule on our own. */ +struct workqueue_struct *ocfs2_wq = NULL; + +static struct dentry *ocfs2_debugfs_root = NULL; + +MODULE_AUTHOR("Oracle"); +MODULE_LICENSE("GPL"); + +static int ocfs2_parse_options(struct super_block *sb, char *options, + unsigned long *mount_opt, int is_remount); +static void ocfs2_put_super(struct super_block *sb); +static int ocfs2_mount_volume(struct super_block *sb); +static int ocfs2_remount(struct super_block *sb, int *flags, char *data); +static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); +static int ocfs2_initialize_mem_caches(void); +static void ocfs2_free_mem_caches(void); +static void ocfs2_delete_osb(struct ocfs2_super *osb); + +static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf); + +static int ocfs2_sync_fs(struct super_block *sb, int wait); + +static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); +static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); +static int ocfs2_release_system_inodes(struct ocfs2_super *osb); +static int ocfs2_fill_local_node_info(struct ocfs2_super *osb); +static int ocfs2_check_volume(struct ocfs2_super *osb); +static int ocfs2_verify_volume(struct ocfs2_dinode *di, + struct buffer_head *bh, + u32 sectsize); +static int ocfs2_initialize_super(struct super_block *sb, + struct buffer_head *bh, + int sector_size); +static int ocfs2_get_sector(struct super_block *sb, + struct buffer_head **bh, + int block, + int sect_size); +static void ocfs2_write_super(struct super_block *sb); +static struct inode *ocfs2_alloc_inode(struct super_block *sb); +static void ocfs2_destroy_inode(struct inode *inode); + +static unsigned long long ocfs2_max_file_offset(unsigned int blockshift); + +static struct super_operations ocfs2_sops = { + .statfs = ocfs2_statfs, + .alloc_inode = ocfs2_alloc_inode, + .destroy_inode = ocfs2_destroy_inode, + .drop_inode = ocfs2_drop_inode, + .clear_inode = ocfs2_clear_inode, + .delete_inode = ocfs2_delete_inode, + .sync_fs = ocfs2_sync_fs, + .write_super = ocfs2_write_super, + .put_super = ocfs2_put_super, + .remount_fs = ocfs2_remount, +}; + +enum { + Opt_barrier, + Opt_err_panic, + Opt_err_ro, + Opt_intr, + Opt_nointr, + Opt_hb_none, + Opt_hb_local, + Opt_data_ordered, + Opt_data_writeback, + Opt_err, +}; + +static match_table_t tokens = { + {Opt_barrier, "barrier=%u"}, + {Opt_err_panic, "errors=panic"}, + {Opt_err_ro, "errors=remount-ro"}, + {Opt_intr, "intr"}, + {Opt_nointr, "nointr"}, + {Opt_hb_none, OCFS2_HB_NONE}, + {Opt_hb_local, OCFS2_HB_LOCAL}, + {Opt_data_ordered, "data=ordered"}, + {Opt_data_writeback, "data=writeback"}, + {Opt_err, NULL} +}; + +/* + * write_super and sync_fs ripped right out of ext3. + */ +static void ocfs2_write_super(struct super_block *sb) +{ + if (mutex_trylock(&sb->s_lock) != 0) + BUG(); + sb->s_dirt = 0; +} + +static int ocfs2_sync_fs(struct super_block *sb, int wait) +{ + int status = 0; + tid_t target; + struct ocfs2_super *osb = OCFS2_SB(sb); + + sb->s_dirt = 0; + + if (ocfs2_is_hard_readonly(osb)) + return -EROFS; + + if (wait) { + status = ocfs2_flush_truncate_log(osb); + if (status < 0) + mlog_errno(status); + } else { + ocfs2_schedule_truncate_log_flush(osb, 0); + } + + if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) { + if (wait) + log_wait_commit(OCFS2_SB(sb)->journal->j_journal, + target); + } + return 0; +} + +static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) +{ + struct inode *new = NULL; + int status = 0; + int i; + + mlog_entry_void(); + + new = ocfs2_iget(osb, osb->root_blkno); + if (IS_ERR(new)) { + status = PTR_ERR(new); + mlog_errno(status); + goto bail; + } + osb->root_inode = new; + + new = ocfs2_iget(osb, osb->system_dir_blkno); + if (IS_ERR(new)) { + status = PTR_ERR(new); + mlog_errno(status); + goto bail; + } + osb->sys_root_inode = new; + + for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; + i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { + new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); + if (!new) { + ocfs2_release_system_inodes(osb); + status = -EINVAL; + mlog_errno(status); + /* FIXME: Should ERROR_RO_FS */ + mlog(ML_ERROR, "Unable to load system inode %d, " + "possibly corrupt fs?", i); + goto bail; + } + // the array now has one ref, so drop this one + iput(new); + } + +bail: + mlog_exit(status); + return status; +} + +static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) +{ + struct inode *new = NULL; + int status = 0; + int i; + + mlog_entry_void(); + + for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; + i < NUM_SYSTEM_INODES; + i++) { + new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); + if (!new) { + ocfs2_release_system_inodes(osb); + status = -EINVAL; + mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", + status, i, osb->slot_num); + goto bail; + } + /* the array now has one ref, so drop this one */ + iput(new); + } + +bail: + mlog_exit(status); + return status; +} + +static int ocfs2_release_system_inodes(struct ocfs2_super *osb) +{ + int status = 0, i; + struct inode *inode; + + mlog_entry_void(); + + for (i = 0; i < NUM_SYSTEM_INODES; i++) { + inode = osb->system_inodes[i]; + if (inode) { + iput(inode); + osb->system_inodes[i] = NULL; + } + } + + inode = osb->sys_root_inode; + if (inode) { + iput(inode); + osb->sys_root_inode = NULL; + } + + inode = osb->root_inode; + if (inode) { + iput(inode); + osb->root_inode = NULL; + } + + mlog_exit(status); + return status; +} + +/* We're allocating fs objects, use GFP_NOFS */ +static struct inode *ocfs2_alloc_inode(struct super_block *sb) +{ + struct ocfs2_inode_info *oi; + + oi = kmem_cache_alloc(ocfs2_inode_cachep, SLAB_NOFS); + if (!oi) + return NULL; + + return &oi->vfs_inode; +} + +static void ocfs2_destroy_inode(struct inode *inode) +{ + kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); +} + +/* From xfs_super.c:xfs_max_file_offset + * Copyright (c) 2000-2004 Silicon Graphics, Inc. + */ +static unsigned long long ocfs2_max_file_offset(unsigned int blockshift) +{ + unsigned int pagefactor = 1; + unsigned int bitshift = BITS_PER_LONG - 1; + + /* Figure out maximum filesize, on Linux this can depend on + * the filesystem blocksize (on 32 bit platforms). + * __block_prepare_write does this in an [unsigned] long... + * page->index << (PAGE_CACHE_SHIFT - bbits) + * So, for page sized blocks (4K on 32 bit platforms), + * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is + * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) + * but for smaller blocksizes it is less (bbits = log2 bsize). + * Note1: get_block_t takes a long (implicit cast from above) + * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch + * can optionally convert the [unsigned] long from above into + * an [unsigned] long long. + */ + +#if BITS_PER_LONG == 32 +# if defined(CONFIG_LBD) + BUG_ON(sizeof(sector_t) != 8); + pagefactor = PAGE_CACHE_SIZE; + bitshift = BITS_PER_LONG; +# else + pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); +# endif +#endif + + return (((unsigned long long)pagefactor) << bitshift) - 1; +} + +static int ocfs2_remount(struct super_block *sb, int *flags, char *data) +{ + int incompat_features; + int ret = 0; + unsigned long parsed_options; + struct ocfs2_super *osb = OCFS2_SB(sb); + + if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { + ret = -EINVAL; + goto out; + } + + if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != + (parsed_options & OCFS2_MOUNT_HB_LOCAL)) { + ret = -EINVAL; + mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); + goto out; + } + + if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != + (parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) { + ret = -EINVAL; + mlog(ML_ERROR, "Cannot change data mode on remount\n"); + goto out; + } + + /* We're going to/from readonly mode. */ + if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { + /* Lock here so the check of HARD_RO and the potential + * setting of SOFT_RO is atomic. */ + spin_lock(&osb->osb_lock); + if (osb->osb_flags & OCFS2_OSB_HARD_RO) { + mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); + ret = -EROFS; + goto unlock_osb; + } + + if (*flags & MS_RDONLY) { + mlog(0, "Going to ro mode.\n"); + sb->s_flags |= MS_RDONLY; + osb->osb_flags |= OCFS2_OSB_SOFT_RO; + } else { + mlog(0, "Making ro filesystem writeable.\n"); + + if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { + mlog(ML_ERROR, "Cannot remount RDWR " + "filesystem due to previous errors.\n"); + ret = -EROFS; + goto unlock_osb; + } + incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); + if (incompat_features) { + mlog(ML_ERROR, "Cannot remount RDWR because " + "of unsupported optional features " + "(%x).\n", incompat_features); + ret = -EINVAL; + goto unlock_osb; + } + sb->s_flags &= ~MS_RDONLY; + osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; + } +unlock_osb: + spin_unlock(&osb->osb_lock); + } + + if (!ret) { + if (!ocfs2_is_hard_readonly(osb)) + ocfs2_set_journal_params(osb); + + /* Only save off the new mount options in case of a successful + * remount. */ + osb->s_mount_opt = parsed_options; + } +out: + return ret; +} + +static int ocfs2_sb_probe(struct super_block *sb, + struct buffer_head **bh, + int *sector_size) +{ + int status = 0, tmpstat; + struct ocfs1_vol_disk_hdr *hdr; + struct ocfs2_dinode *di; + int blksize; + + *bh = NULL; + + /* may be > 512 */ + *sector_size = bdev_hardsect_size(sb->s_bdev); + if (*sector_size > OCFS2_MAX_BLOCKSIZE) { + mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", + *sector_size, OCFS2_MAX_BLOCKSIZE); + status = -EINVAL; + goto bail; + } + + /* Can this really happen? */ + if (*sector_size < OCFS2_MIN_BLOCKSIZE) + *sector_size = OCFS2_MIN_BLOCKSIZE; + + /* check block zero for old format */ + status = ocfs2_get_sector(sb, bh, 0, *sector_size); + if (status < 0) { + mlog_errno(status); + goto bail; + } + hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; + if (hdr->major_version == OCFS1_MAJOR_VERSION) { + mlog(ML_ERROR, "incompatible version: %u.%u\n", + hdr->major_version, hdr->minor_version); + status = -EINVAL; + } + if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, + strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { + mlog(ML_ERROR, "incompatible volume signature: %8s\n", + hdr->signature); + status = -EINVAL; + } + brelse(*bh); + *bh = NULL; + if (status < 0) { + mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " + "upgraded before mounting with ocfs v2\n"); + goto bail; + } + + /* + * Now check at magic offset for 512, 1024, 2048, 4096 + * blocksizes. 4096 is the maximum blocksize because it is + * the minimum clustersize. + */ + status = -EINVAL; + for (blksize = *sector_size; + blksize <= OCFS2_MAX_BLOCKSIZE; + blksize <<= 1) { + tmpstat = ocfs2_get_sector(sb, bh, + OCFS2_SUPER_BLOCK_BLKNO, + blksize); + if (tmpstat < 0) { + status = tmpstat; + mlog_errno(status); + goto bail; + } + di = (struct ocfs2_dinode *) (*bh)->b_data; + status = ocfs2_verify_volume(di, *bh, blksize); + if (status >= 0) + goto bail; + brelse(*bh); + *bh = NULL; + if (status != -EAGAIN) + break; + } + +bail: + return status; +} + +static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) +{ + struct dentry *root; + int status, sector_size; + unsigned long parsed_opt; + struct inode *inode = NULL; + struct ocfs2_super *osb = NULL; + struct buffer_head *bh = NULL; + + mlog_entry("%p, %p, %i", sb, data, silent); + + /* for now we only have one cluster/node, make sure we see it + * in the heartbeat universe */ + if (!o2hb_check_local_node_heartbeating()) { + status = -EINVAL; + goto read_super_error; + } + + /* probe for superblock */ + status = ocfs2_sb_probe(sb, &bh, §or_size); + if (status < 0) { + mlog(ML_ERROR, "superblock probe failed!\n"); + goto read_super_error; + } + + status = ocfs2_initialize_super(sb, bh, sector_size); + osb = OCFS2_SB(sb); + if (status < 0) { + mlog_errno(status); + goto read_super_error; + } + brelse(bh); + bh = NULL; + + if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) { + status = -EINVAL; + goto read_super_error; + } + osb->s_mount_opt = parsed_opt; + + sb->s_magic = OCFS2_SUPER_MAGIC; + + /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, + * heartbeat=none */ + if (bdev_read_only(sb->s_bdev)) { + if (!(sb->s_flags & MS_RDONLY)) { + status = -EACCES; + mlog(ML_ERROR, "Readonly device detected but readonly " + "mount was not specified.\n"); + goto read_super_error; + } + + /* You should not be able to start a local heartbeat + * on a readonly device. */ + if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { + status = -EROFS; + mlog(ML_ERROR, "Local heartbeat specified on readonly " + "device.\n"); + goto read_super_error; + } + + status = ocfs2_check_journals_nolocks(osb); + if (status < 0) { + if (status == -EROFS) + mlog(ML_ERROR, "Recovery required on readonly " + "file system, but write access is " + "unavailable.\n"); + else + mlog_errno(status); + goto read_super_error; + } + + ocfs2_set_ro_flag(osb, 1); + + printk(KERN_NOTICE "Readonly device detected. No cluster " + "services will be utilized for this mount. Recovery " + "will be skipped.\n"); + } + + if (!ocfs2_is_hard_readonly(osb)) { + /* If this isn't a hard readonly mount, then we need + * to make sure that heartbeat is in a valid state, + * and that we mark ourselves soft readonly is -oro + * was specified. */ + if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { + mlog(ML_ERROR, "No heartbeat for device (%s)\n", + sb->s_id); + status = -EINVAL; + goto read_super_error; + } + + if (sb->s_flags & MS_RDONLY) + ocfs2_set_ro_flag(osb, 0); + } + + osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, + ocfs2_debugfs_root); + if (!osb->osb_debug_root) { + status = -EINVAL; + mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); + goto read_super_error; + } + + status = ocfs2_mount_volume(sb); + if (osb->root_inode) + inode = igrab(osb->root_inode); + + if (status < 0) + goto read_super_error; + + if (!inode) { + status = -EIO; + mlog_errno(status); + goto read_super_error; + } + + root = d_alloc_root(inode); + if (!root) { + status = -ENOMEM; + mlog_errno(status); + goto read_super_error; + } + + sb->s_root = root; + + ocfs2_complete_mount_recovery(osb); + + printk("ocfs2: Mounting device (%u,%u) on (node %d, slot %d) with %s " + "data mode.\n", + MAJOR(sb->s_dev), MINOR(sb->s_dev), osb->node_num, + osb->slot_num, + osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : + "ordered"); + + atomic_set(&osb->vol_state, VOLUME_MOUNTED); + wake_up(&osb->osb_mount_event); + + mlog_exit(status); + return status; + +read_super_error: + if (bh != NULL) + brelse(bh); + + if (inode) + iput(inode); + + if (osb) { + atomic_set(&osb->vol_state, VOLUME_DISABLED); + wake_up(&osb->osb_mount_event); + ocfs2_dismount_volume(sb, 1); + } + + mlog_exit(status); + return status; +} + +static struct super_block *ocfs2_get_sb(struct file_system_type *fs_type, + int flags, + const char *dev_name, + void *data) +{ + return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); +} + +static struct file_system_type ocfs2_fs_type = { + .owner = THIS_MODULE, + .name = "ocfs2", + .get_sb = ocfs2_get_sb, /* is this called when we mount + * the fs? */ + .kill_sb = kill_block_super, /* set to the generic one + * right now, but do we + * need to change that? */ + .fs_flags = FS_REQUIRES_DEV, + .next = NULL +}; + +static int ocfs2_parse_options(struct super_block *sb, + char *options, + unsigned long *mount_opt, + int is_remount) +{ + int status; + char *p; + + mlog_entry("remount: %d, options: \"%s\"\n", is_remount, + options ? options : "(none)"); + + *mount_opt = 0; + + if (!options) { + status = 1; + goto bail; + } + + while ((p = strsep(&options, ",")) != NULL) { + int token, option; + substring_t args[MAX_OPT_ARGS]; + + if (!*p) + continue; + + token = match_token(p, tokens, args); + switch (token) { + case Opt_hb_local: + *mount_opt |= OCFS2_MOUNT_HB_LOCAL; + break; + case Opt_hb_none: + *mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; + break; + case Opt_barrier: + if (match_int(&args[0], &option)) { + status = 0; + goto bail; + } + if (option) + *mount_opt |= OCFS2_MOUNT_BARRIER; + else + *mount_opt &= ~OCFS2_MOUNT_BARRIER; + break; + case Opt_intr: + *mount_opt &= ~OCFS2_MOUNT_NOINTR; + break; + case Opt_nointr: + *mount_opt |= OCFS2_MOUNT_NOINTR; + break; + case Opt_err_panic: + *mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; + break; + case Opt_err_ro: + *mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; + break; + case Opt_data_ordered: + *mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; + break; + case Opt_data_writeback: + *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; + break; + default: + mlog(ML_ERROR, + "Unrecognized mount option \"%s\" " + "or missing value\n", p); + status = 0; + goto bail; + } + } + + status = 1; + +bail: + mlog_exit(status); + return status; +} + +static int __init ocfs2_init(void) +{ + int status; + + mlog_entry_void(); + + ocfs2_print_version(); + + if (init_ocfs2_extent_maps()) + return -ENOMEM; + + status = init_ocfs2_uptodate_cache(); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + status = ocfs2_initialize_mem_caches(); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); + if (!ocfs2_wq) { + status = -ENOMEM; + goto leave; + } + + spin_lock(&ocfs2_globals_lock); + osb_id = 0; + spin_unlock(&ocfs2_globals_lock); + + ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); + if (!ocfs2_debugfs_root) { + status = -EFAULT; + mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); + } + +leave: + if (status < 0) { + ocfs2_free_mem_caches(); + exit_ocfs2_uptodate_cache(); + exit_ocfs2_extent_maps(); + } + + mlog_exit(status); + + if (status >= 0) { + return register_filesystem(&ocfs2_fs_type); + } else + return -1; +} + +static void __exit ocfs2_exit(void) +{ + mlog_entry_void(); + + if (ocfs2_wq) { + flush_workqueue(ocfs2_wq); + destroy_workqueue(ocfs2_wq); + } + + debugfs_remove(ocfs2_debugfs_root); + + ocfs2_free_mem_caches(); + + unregister_filesystem(&ocfs2_fs_type); + + exit_ocfs2_extent_maps(); + + exit_ocfs2_uptodate_cache(); + + mlog_exit_void(); +} + +static void ocfs2_put_super(struct super_block *sb) +{ + mlog_entry("(0x%p)\n", sb); + + ocfs2_sync_blockdev(sb); + ocfs2_dismount_volume(sb, 0); + + mlog_exit_void(); +} + +static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf) +{ + struct ocfs2_super *osb; + u32 numbits, freebits; + int status; + struct ocfs2_dinode *bm_lock; + struct buffer_head *bh = NULL; + struct inode *inode = NULL; + + mlog_entry("(%p, %p)\n", sb, buf); + + osb = OCFS2_SB(sb); + + inode = ocfs2_get_system_file_inode(osb, + GLOBAL_BITMAP_SYSTEM_INODE, + OCFS2_INVALID_SLOT); + if (!inode) { + mlog(ML_ERROR, "failed to get bitmap inode\n"); + status = -EIO; + goto bail; + } + + status = ocfs2_meta_lock(inode, NULL, &bh, 0); + if (status < 0) { + mlog_errno(status); + goto bail; + } + + bm_lock = (struct ocfs2_dinode *) bh->b_data; + + numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); + freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); + + buf->f_type = OCFS2_SUPER_MAGIC; + buf->f_bsize = sb->s_blocksize; + buf->f_namelen = OCFS2_MAX_FILENAME_LEN; + buf->f_blocks = ((sector_t) numbits) * + (osb->s_clustersize >> osb->sb->s_blocksize_bits); + buf->f_bfree = ((sector_t) freebits) * + (osb->s_clustersize >> osb->sb->s_blocksize_bits); + buf->f_bavail = buf->f_bfree; + buf->f_files = numbits; + buf->f_ffree = freebits; + + brelse(bh); + + ocfs2_meta_unlock(inode, 0); + status = 0; +bail: + if (inode) + iput(inode); + + mlog_exit(status); + + return status; +} + +static void ocfs2_inode_init_once(void *data, + kmem_cache_t *cachep, + unsigned long flags) +{ + struct ocfs2_inode_info *oi = data; + + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == + SLAB_CTOR_CONSTRUCTOR) { + oi->ip_flags = 0; + oi->ip_open_count = 0; + spin_lock_init(&oi->ip_lock); + ocfs2_extent_map_init(&oi->vfs_inode); + INIT_LIST_HEAD(&oi->ip_handle_list); + INIT_LIST_HEAD(&oi->ip_io_markers); + oi->ip_handle = NULL; + oi->ip_created_trans = 0; + oi->ip_last_trans = 0; + oi->ip_dir_start_lookup = 0; + + init_rwsem(&oi->ip_alloc_sem); + init_MUTEX(&(oi->ip_io_sem)); + + oi->ip_blkno = 0ULL; + oi->ip_clusters = 0; + + ocfs2_lock_res_init_once(&oi->ip_rw_lockres); + ocfs2_lock_res_init_once(&oi->ip_meta_lockres); + ocfs2_lock_res_init_once(&oi->ip_data_lockres); + + ocfs2_metadata_cache_init(&oi->vfs_inode); + + inode_init_once(&oi->vfs_inode); + } +} + +static int ocfs2_initialize_mem_caches(void) +{ + ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", + sizeof(struct ocfs2_inode_info), + 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT, + ocfs2_inode_init_once, NULL); + if (!ocfs2_inode_cachep) + return -ENOMEM; + + ocfs2_lock_cache = kmem_cache_create("ocfs2_lock", + sizeof(struct ocfs2_journal_lock), + 0, + SLAB_NO_REAP|SLAB_HWCACHE_ALIGN, + NULL, NULL); + if (!ocfs2_lock_cache) + return -ENOMEM; + + return 0; +} + +static void ocfs2_free_mem_caches(void) +{ + if (ocfs2_inode_cachep) + kmem_cache_destroy(ocfs2_inode_cachep); + if (ocfs2_lock_cache) + kmem_cache_destroy(ocfs2_lock_cache); + + ocfs2_inode_cachep = NULL; + ocfs2_lock_cache = NULL; +} + +static int ocfs2_get_sector(struct super_block *sb, + struct buffer_head **bh, + int block, + int sect_size) +{ + if (!sb_set_blocksize(sb, sect_size)) { + mlog(ML_ERROR, "unable to set blocksize\n"); + return -EIO; + } + + *bh = sb_getblk(sb, block); + if (!*bh) { + mlog_errno(-EIO); + return -EIO; + } + lock_buffer(*bh); + if (!buffer_dirty(*bh)) + clear_buffer_uptodate(*bh); + unlock_buffer(*bh); + ll_rw_block(READ, 1, bh); + wait_on_buffer(*bh); + return 0; +} + +/* ocfs2 1.0 only allows one cluster and node identity per kernel image. */ +static int ocfs2_fill_local_node_info(struct ocfs2_super *osb) +{ + int status; + + /* XXX hold a ref on the node while mounte? easy enough, if + * desirable. */ + osb->node_num = o2nm_this_node(); + if (osb->node_num == O2NM_MAX_NODES) { + mlog(ML_ERROR, "could not find this host's node number\n"); + status = -ENOENT; + goto bail; + } + + mlog(ML_NOTICE, "I am node %d\n", osb->node_num); + + status = 0; +bail: + return status; +} + +static int ocfs2_mount_volume(struct super_block *sb) +{ + int status = 0; + int unlock_super = 0; + struct ocfs2_super *osb = OCFS2_SB(sb); + + mlog_entry_void(); + + if (ocfs2_is_hard_readonly(osb)) + goto leave; + + status = ocfs2_fill_local_node_info(osb); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + status = ocfs2_register_hb_callbacks(osb); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + status = ocfs2_dlm_init(osb); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + /* requires vote_thread to be running. */ + status = ocfs2_register_net_handlers(osb); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + status = ocfs2_super_lock(osb, 1); + if (status < 0) { + mlog_errno(status); + goto leave; + } + unlock_super = 1; + + /* This will load up the node map and add ourselves to it. */ + status = ocfs2_find_slot(osb); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + ocfs2_populate_mounted_map(osb); + + /* load all node-local system inodes */ + status = ocfs2_init_local_system_inodes(osb); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + status = ocfs2_check_volume(osb); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + status = ocfs2_truncate_log_init(osb); + if (status < 0) { + mlog_errno(status); + goto leave; + } + + /* This should be sent *after* we recovered our journal as it + * will cause other nodes to unmark us as needing + * recovery. However, we need to send it *before* dropping the + * super block lock as otherwise their recovery threads might + * try to clean us up while we're live! */ + status = ocfs2_request_mount_vote(osb); + if (status < 0) + mlog_errno(status); + +leave: + if (unlock_super) + ocfs2_super_unlock(osb, 1); + + mlog_exit(status); + return status; +} + +/* we can't grab the goofy sem lock from inside wait_event, so we use + * memory barriers to make sure that we'll see the null task before + * being woken up */ +static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) +{ + mb(); + return osb->recovery_thread_task != NULL; +} + +static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) +{ + int tmp; + struct ocfs2_super *osb = NULL; + + mlog_entry("(0x%p)\n", sb); + + BUG_ON(!sb); + osb = OCFS2_SB(sb); + BUG_ON(!osb); + + ocfs2_shutdown_local_alloc(osb); + + ocfs2_truncate_log_shutdown(osb); + + /* disable any new recovery threads and wait for any currently + * running ones to exit. Do this before setting the vol_state. */ + down(&osb->recovery_lock); + osb->disable_recovery = 1; + up(&osb->recovery_lock); + wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); + + /* At this point, we know that no more recovery threads can be + * launched, so wait for any recovery completion work to + * complete. */ + flush_workqueue(ocfs2_wq); + + ocfs2_journal_shutdown(osb); + + ocfs2_sync_blockdev(sb); + + /* No dlm means we've failed during mount, so skip all the + * steps which depended on that to complete. */ + if (osb->dlm) { + tmp = ocfs2_super_lock(osb, 1); + if (tmp < 0) { + mlog_errno(tmp); + return; + } + + tmp = ocfs2_request_umount_vote(osb); + if (tmp < 0) + mlog_errno(tmp); + + if (osb->slot_num != OCFS2_INVALID_SLOT) + ocfs2_put_slot(osb); + + ocfs2_super_unlock(osb, 1); + } + + ocfs2_release_system_inodes(osb); + + if (osb->dlm) { + ocfs2_unregister_net_handlers(osb); + + ocfs2_dlm_shutdown(osb); + } + + ocfs2_clear_hb_callbacks(osb); + + debugfs_remove(osb->osb_debug_root); + + if (!mnt_err) + ocfs2_stop_heartbeat(osb); + + atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); + + printk("ocfs2: Unmounting device (%u,%u) on (node %d)\n", + MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev), osb->node_num); + + ocfs2_delete_osb(osb); + kfree(osb); + sb->s_dev = 0; + sb->s_fs_info = NULL; +} + +static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, + unsigned uuid_bytes) +{ + int i, ret; + char *ptr; + + BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); + + osb->uuid_str = kcalloc(1, OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); + if (osb->uuid_str == NULL) + return -ENOMEM; + + memcpy(osb->uuid, uuid, OCFS2_VOL_UUID_LEN); + + for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { + /* print with null */ + ret = snprintf(ptr, 3, "%02X", uuid[i]); + if (ret != 2) /* drop super cleans up */ + return -EINVAL; + /* then only advance past the last char */ + ptr += 2; + } + + return 0; +} + +static int ocfs2_initialize_super(struct super_block *sb, + struct buffer_head *bh, + int sector_size) +{ + int status = 0; + int i; + struct ocfs2_dinode *di = NULL; + struct inode *inode = NULL; + struct buffer_head *bitmap_bh = NULL; + struct ocfs2_journal *journal; + __le32 uuid_net_key; + struct ocfs2_super *osb; + + mlog_entry_void(); + + osb = kcalloc(1, sizeof(struct ocfs2_super), GFP_KERNEL); + if (!osb) { + status = -ENOMEM; + mlog_errno(status); + goto bail; + } + + sb->s_fs_info = osb; + sb->s_op = &ocfs2_sops; + sb->s_export_op = &ocfs2_export_ops; + sb->s_flags |= MS_NOATIME; + /* this is needed to support O_LARGEFILE */ + sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits); + + osb->sb = sb; + /* Save off for ocfs2_rw_direct */ + osb->s_sectsize_bits = blksize_bits(sector_size); + if (!osb->s_sectsize_bits) + BUG(); + + osb->net_response_ids = 0; + spin_lock_init(&osb->net_response_lock); + INIT_LIST_HEAD(&osb->net_response_list); + + INIT_LIST_HEAD(&osb->osb_net_handlers); + init_waitqueue_head(&osb->recovery_event); + spin_lock_init(&osb->vote_task_lock); + init_waitqueue_head(&osb->vote_event); + osb->vote_work_sequence = 0; + osb->vote_wake_sequence = 0; + INIT_LIST_HEAD(&osb->blocked_lock_list); + osb->blocked_lock_count = 0; + INIT_LIST_HEAD(&osb->vote_list); + spin_lock_init(&osb->osb_lock); + + atomic_set(&osb->alloc_stats.moves, 0); + atomic_set(&osb->alloc_stats.local_data, 0); + atomic_set(&osb->alloc_stats.bitmap_data, 0); + atomic_set(&osb->alloc_stats.bg_allocs, 0); + atomic_set(&osb->alloc_stats.bg_extends, 0); + + ocfs2_init_node_maps(osb); + + snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", + MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); + + init_MUTEX(&osb->recovery_lock); + + osb->disable_recovery = 0; + osb->recovery_thread_task = NULL; + + init_waitqueue_head(&osb->checkpoint_event); + atomic_set(&osb->needs_checkpoint, 0); + + osb->node_num = O2NM_INVALID_NODE_NUM; + osb->slot_num = OCFS2_INVALID_SLOT; + + osb->local_alloc_state = OCFS2_LA_UNUSED; + osb->local_alloc_bh = NULL; + + ocfs2_setup_hb_callbacks(osb); + + init_waitqueue_head(&osb->osb_mount_event); + + osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); + if (!osb->vol_label) { + mlog(ML_ERROR, "unable to alloc vol label\n"); + status = -ENOMEM; + goto bail; + } + + osb->uuid = kmalloc(OCFS2_VOL_UUID_LEN, GFP_KERNEL); + if (!osb->uuid) { + mlog(ML_ERROR, "unable to alloc uuid\n"); + status = -ENOMEM; + goto bail; + } + + di = (struct ocfs2_dinode *)bh->b_data; + + osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); + if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { + mlog(ML_ERROR, "Invalid number of node slots (%u)\n", + osb->max_slots); + status = -EINVAL; + goto bail; + } + mlog(ML_NOTICE, "max_slots for this device: %u\n", osb->max_slots); + + osb->s_feature_compat = + le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); + osb->s_feature_ro_compat = + le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); + osb->s_feature_incompat = + le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); + + if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { + mlog(ML_ERROR, "couldn't mount because of unsupported " + "optional features (%x).\n", i); + status = -EINVAL; + goto bail; + } + if (!(osb->sb->s_flags & MS_RDONLY) && + (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { + mlog(ML_ERROR, "couldn't mount RDWR because of " + "unsupported optional features (%x).\n", i); + status = -EINVAL; + goto bail; + } + + get_random_bytes(&osb->s_next_generation, sizeof(u32)); + + /* FIXME + * This should be done in ocfs2_journal_init(), but unknown + * ordering issues will cause the filesystem to crash. + * If anyone wants to figure out what part of the code + * refers to osb->journal before ocfs2_journal_init() is run, + * be my guest. + */ + /* initialize our journal structure */ + + journal = kcalloc(1, sizeof(struct ocfs2_journal), GFP_KERNEL); + if (!journal) { + mlog(ML_ERROR, "unable to alloc journal\n"); + status = -ENOMEM; + goto bail; + } + osb->journal = journal; + journal->j_osb = osb; + + atomic_set(&journal->j_num_trans, 0); + init_rwsem(&journal->j_trans_barrier); + init_waitqueue_head(&journal->j_checkpointed); + spin_lock_init(&journal->j_lock); + journal->j_trans_id = (unsigned long) 1; + INIT_LIST_HEAD(&journal->j_la_cleanups); + INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery, osb); + journal->j_state = OCFS2_JOURNAL_FREE; + + /* get some pseudo constants for clustersize bits */ + osb->s_clustersize_bits = + le32_to_cpu(di->id2.i_super.s_clustersize_bits); + osb->s_clustersize = 1 << osb->s_clustersize_bits; + mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); + + if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || + osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { + mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", + osb->s_clustersize); + status = -EINVAL; + goto bail; + } + + if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) + > (u32)~0UL) { + mlog(ML_ERROR, "Volume might try to write to blocks beyond " + "what jbd can address in 32 bits.\n"); + status = -EINVAL; + goto bail; + } + + if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, + sizeof(di->id2.i_super.s_uuid))) { + mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); + status = -ENOMEM; + goto bail; + } + + memcpy(&uuid_net_key, &osb->uuid[i], sizeof(osb->net_key)); + osb->net_key = le32_to_cpu(uuid_net_key); + + strncpy(osb->vol_label, di->id2.i_super.s_label, 63); + osb->vol_label[63] = '\0'; + osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); + osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); + osb->first_cluster_group_blkno = + le64_to_cpu(di->id2.i_super.s_first_cluster_group); + osb->fs_generation = le32_to_cpu(di->i_fs_generation); + mlog(0, "vol_label: %s\n", osb->vol_label); + mlog(0, "uuid: %s\n", osb->uuid_str); + mlog(0, "root_blkno=%"MLFu64", system_dir_blkno=%"MLFu64"\n", + osb->root_blkno, osb->system_dir_blkno); + + osb->osb_dlm_debug = ocfs2_new_dlm_debug(); + if (!osb->osb_dlm_debug) { + status = -ENOMEM; + mlog_errno(status); + goto bail; + } + + atomic_set(&osb->vol_state, VOLUME_INIT); + + /* load root, system_dir, and all global system inodes */ + status = ocfs2_init_global_system_inodes(osb); + if (status < 0) { + mlog_errno(status); + goto bail; + } + + /* + * global bitmap + */ + inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, + OCFS2_INVALID_SLOT); + if (!inode) { + status = -EINVAL; + mlog_errno(status); + goto bail; + } + + osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; + + status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0, + inode); + iput(inode); + if (status < 0) { + mlog_errno(status); + goto bail; + } + + di = (struct ocfs2_dinode *) bitmap_bh->b_data; + osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg); + osb->num_clusters = le32_to_cpu(di->id1.bitmap1.i_total); + brelse(bitmap_bh); + mlog(0, "cluster bitmap inode: %"MLFu64", clusters per group: %u\n", + osb->bitmap_blkno, osb->bitmap_cpg); + + status = ocfs2_init_slot_info(osb); + if (status < 0) { + mlog_errno(status); + goto bail; + } + + /* Link this osb onto the global linked list of all osb structures. */ + /* The Global Link List is mainted for the whole driver . */ + spin_lock(&ocfs2_globals_lock); + osb->osb_id = osb_id; + if (osb_id < OCFS2_MAX_OSB_ID) + osb_id++; + else { + mlog(ML_ERROR, "Too many volumes mounted\n"); + status = -ENOMEM; + } + spin_unlock(&ocfs2_globals_lock); + +bail: + mlog_exit(status); + return status; +} + +/* + * will return: -EAGAIN if it is ok to keep searching for superblocks + * -EINVAL if there is a bad superblock + * 0 on success + */ +static int ocfs2_verify_volume(struct ocfs2_dinode *di, + struct buffer_head *bh, + u32 blksz) +{ + int status = -EAGAIN; + + mlog_entry_void(); + + if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, + strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { + status = -EINVAL; + if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { + mlog(ML_ERROR, "found superblock with incorrect block " + "size: found %u, should be %u\n", + 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), + blksz); + } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != + OCFS2_MAJOR_REV_LEVEL || + le16_to_cpu(di->id2.i_super.s_minor_rev_level) != + OCFS2_MINOR_REV_LEVEL) { + mlog(ML_ERROR, "found superblock with bad version: " + "found %u.%u, should be %u.%u\n", + le16_to_cpu(di->id2.i_super.s_major_rev_level), + le16_to_cpu(di->id2.i_super.s_minor_rev_level), + OCFS2_MAJOR_REV_LEVEL, + OCFS2_MINOR_REV_LEVEL); + } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { + mlog(ML_ERROR, "bad block number on superblock: " + "found %"MLFu64", should be %llu\n", + di->i_blkno, (unsigned long long)bh->b_blocknr); + } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || + le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { + mlog(ML_ERROR, "bad cluster size found: %u\n", + 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); + } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { + mlog(ML_ERROR, "bad root_blkno: 0\n"); + } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { + mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); + } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { + mlog(ML_ERROR, + "Superblock slots found greater than file system " + "maximum: found %u, max %u\n", + le16_to_cpu(di->id2.i_super.s_max_slots), + OCFS2_MAX_SLOTS); + } else { + /* found it! */ + status = 0; + } + } + + mlog_exit(status); + return status; +} + +static int ocfs2_check_volume(struct ocfs2_super *osb) +{ + int status = 0; + int dirty; + struct ocfs2_dinode *local_alloc = NULL; /* only used if we + * recover + * ourselves. */ + + mlog_entry_void(); + + /* Init our journal object. */ + status = ocfs2_journal_init(osb->journal, &dirty); + if (status < 0) { + mlog(ML_ERROR, "Could not initialize journal!\n"); + goto finally; + } + + /* If the journal was unmounted cleanly then we don't want to + * recover anything. Otherwise, journal_load will do that + * dirty work for us :) */ + if (!dirty) { + status = ocfs2_journal_wipe(osb->journal, 0); + if (status < 0) { + mlog_errno(status); + goto finally; + } + } else { + mlog(ML_NOTICE, "File system was not unmounted cleanly, " + "recovering volume.\n"); + } + + /* will play back anything left in the journal. */ + ocfs2_journal_load(osb->journal); + + if (dirty) { + /* recover my local alloc if we didn't unmount cleanly. */ + status = ocfs2_begin_local_alloc_recovery(osb, + osb->slot_num, + &local_alloc); + if (status < 0) { + mlog_errno(status); + goto finally; + } + /* we complete the recovery process after we've marked + * ourselves as mounted. */ + } + + mlog(0, "Journal loaded.\n"); + + status = ocfs2_load_local_alloc(osb); + if (status < 0) { + mlog_errno(status); + goto finally; + } + + if (dirty) { + /* Recovery will be completed after we've mounted the + * rest of the volume. */ + osb->dirty = 1; + osb->local_alloc_copy = local_alloc; + local_alloc = NULL; + } + + /* go through each journal, trylock it and if you get the + * lock, and it's marked as dirty, set the bit in the recover + * map and launch a recovery thread for it. */ + status = ocfs2_mark_dead_nodes(osb); + if (status < 0) + mlog_errno(status); + +finally: + if (local_alloc) + kfree(local_alloc); + + mlog_exit(status); + return status; +} + +/* + * The routine gets called from dismount or close whenever a dismount on + * volume is requested and the osb open count becomes 1. + * It will remove the osb from the global list and also free up all the + * initialized resources and fileobject. + */ +static void ocfs2_delete_osb(struct ocfs2_super *osb) +{ + mlog_entry_void(); + + /* This function assumes that the caller has the main osb resource */ + + if (osb->slot_info) + ocfs2_free_slot_info(osb->slot_info); + + /* FIXME + * This belongs in journal shutdown, but because we have to + * allocate osb->journal at the start of ocfs2_initalize_osb(), + * we free it here. + */ + kfree(osb->journal); + if (osb->local_alloc_copy) + kfree(osb->local_alloc_copy); + kfree(osb->uuid_str); + ocfs2_put_dlm_debug(osb->osb_dlm_debug); + memset(osb, 0, sizeof(struct ocfs2_super)); + + mlog_exit_void(); +} + +/* Put OCFS2 into a readonly state, or (if the user specifies it), + * panic(). We do not support continue-on-error operation. */ +static void ocfs2_handle_error(struct super_block *sb) +{ + struct ocfs2_super *osb = OCFS2_SB(sb); + + if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) + panic("OCFS2: (device %s): panic forced after error\n", + sb->s_id); + + ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); + + if (sb->s_flags & MS_RDONLY && + (ocfs2_is_soft_readonly(osb) || + ocfs2_is_hard_readonly(osb))) + return; + + printk(KERN_CRIT "File system is now read-only due to the potential " + "of on-disk corruption. Please run fsck.ocfs2 once the file " + "system is unmounted.\n"); + sb->s_flags |= MS_RDONLY; + ocfs2_set_ro_flag(osb, 0); +} + +static char error_buf[1024]; + +void __ocfs2_error(struct super_block *sb, + const char *function, + const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + vsprintf(error_buf, fmt, args); + va_end(args); + + /* Not using mlog here because we want to show the actual + * function the error came from. */ + printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", + sb->s_id, function, error_buf); + + ocfs2_handle_error(sb); +} + +/* Handle critical errors. This is intentionally more drastic than + * ocfs2_handle_error, so we only use for things like journal errors, + * etc. */ +void __ocfs2_abort(struct super_block* sb, + const char *function, + const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + vsprintf(error_buf, fmt, args); + va_end(args); + + printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", + sb->s_id, function, error_buf); + + /* We don't have the cluster support yet to go straight to + * hard readonly in here. Until then, we want to keep + * ocfs2_abort() so that we can at least mark critical + * errors. + * + * TODO: This should abort the journal and alert other nodes + * that our slot needs recovery. */ + + /* Force a panic(). This stinks, but it's better than letting + * things continue without having a proper hard readonly + * here. */ + OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; + ocfs2_handle_error(sb); +} + +module_init(ocfs2_init); +module_exit(ocfs2_exit); |