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Btrfs: Add the ability to find and remove dead roots after a crash.

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-06-22 14:16:25 -04:00
committed by David Woodhouse
parent 54aa1f4dfd
commit 5eda7b5e9b
7 changed files with 164 additions and 32 deletions
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17
fs/btrfs/ctree.h
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@@ -122,12 +122,12 @@ struct btrfs_super_block {
u8 fsid[16]; /* FS specific uuid */
__le64 blocknr; /* this block number */
__le64 magic;
__le32 blocksize;
__le64 generation;
__le64 root;
__le64 total_blocks;
__le64 blocks_used;
__le64 root_dir_objectid;
__le32 blocksize;
} __attribute__ ((__packed__));
/*
@@ -226,10 +226,12 @@ struct btrfs_root_item {
struct btrfs_inode_item inode;
__le64 root_dirid;
__le64 blocknr;
__le32 flags;
__le64 block_limit;
__le64 blocks_used;
__le32 flags;
__le32 refs;
struct btrfs_disk_key drop_progress;
u8 drop_level;
} __attribute__ ((__packed__));
#define BTRFS_FILE_EXTENT_REG 0
@@ -800,6 +802,16 @@ static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val)
item->refs = cpu_to_le32(val);
}
static inline u32 btrfs_root_flags(struct btrfs_root_item *item)
{
return le32_to_cpu(item->flags);
}
static inline void btrfs_set_root_flags(struct btrfs_root_item *item, u32 val)
{
item->flags = cpu_to_le32(val);
}
static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s)
{
return le64_to_cpu(s->blocknr);
@@ -1076,6 +1088,7 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
*item);
int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
btrfs_root_item *item, struct btrfs_key *key);
int btrfs_find_dead_roots(struct btrfs_root *root);
/* dir-item.c */
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
*root, const char *name, int name_len, u64 dir,