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| author | Anand Jain <anand.jain@oracle.com> | 2015-08-14 18:32:58 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2015-10-01 17:29:38 +0200 |
| commit | 29c36d72535deb3d8961b3fb4b6a565190a6c63b (patch) | |
| tree | 173364b301384a61a2ba336f8354770e645d981a /fs/btrfs/disk-io.h | |
| parent | d74a625987a134b00749e3912bdb6d3ac83fd71d (diff) | |
| download | linux-stable-29c36d72535deb3d8961b3fb4b6a565190a6c63b.tar.gz linux-stable-29c36d72535deb3d8961b3fb4b6a565190a6c63b.tar.bz2 linux-stable-29c36d72535deb3d8961b3fb4b6a565190a6c63b.zip | |
Btrfs: add btrfs_read_dev_one_super() to read one specific SB
This uses a chunk of code from btrfs_read_dev_super() and creates
a function called btrfs_read_dev_one_super() so that next patch
can use it for scratch superblock.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[renamed bufhead to bh]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/disk-io.h')
| -rw-r--r-- | fs/btrfs/disk-io.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index bdfb479ea859..adeb31830b9c 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -60,6 +60,8 @@ void close_ctree(struct btrfs_root *root); int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root, int max_mirrors); struct buffer_head *btrfs_read_dev_super(struct block_device *bdev); +int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num, + struct buffer_head **bh_ret); int btrfs_commit_super(struct btrfs_root *root); struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr); |