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Btrfs: Change the super to point to a tree of trees to enable persistent snapshots

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-03-13 16:47:54 -04:00 • committed by David Woodhouse
parent eaee50e881
commit 3768f3689f
10 changed files with 445 additions and 65 deletions
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3
fs/btrfs/disk-io.h
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@ -24,7 +24,8 @@ struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *s);
int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s);
void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf);
int write_ctree_super(struct btrfs_root *root, struct btrfs_super_block *s);
int mkfs(int fd);
int mkfs(int fd, u64 num_blocks, u16 blocksize);
#define BTRFS_SUPER_INFO_OFFSET(bs) (16 * (bs))