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authorAnand Jain <anand.jain@oracle.com>2015-08-14 13:32:58 +0300
committerDavid Sterba <dsterba@suse.com>2015-10-01 18:29:38 +0300
commit29c36d72535deb3d8961b3fb4b6a565190a6c63b (patch)
tree173364b301384a61a2ba336f8354770e645d981a /fs/btrfs/disk-io.h
parentd74a625987a134b00749e3912bdb6d3ac83fd71d (diff)
downloadlinux-29c36d72535deb3d8961b3fb4b6a565190a6c63b.tar.xz
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.h2
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);