path: root/disk-io.h
diff options
authorChris Mason <>2010-12-09 16:36:29 -0500
committerChris Mason <>2011-10-25 09:18:31 -0400
commitb4382217f18a27be16f9a960ac3b1327c87297e7 (patch)
tree0827570ecbaebaf234026bcec1e6885d0b373d95 /disk-io.h
parentfe7caa7c4a3bb738d3eb3ac6edaa24c8b38ec95f (diff)
Btrfs-progs: add a btrfs-select-super command to overwrite the super
Btrfs stores multiple copies of the superblock, and for common power-failure crashes where barriers were not in use, one of the super copies is often valid while the first copy is not. This adds a btrfs-select-super -s N /dev/xxx command, which can overwrite all the super blocks with a copy that you have already determined is valid with btrfsck -s Signed-off-by: Chris Mason <>
Diffstat (limited to 'disk-io.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/disk-io.h b/disk-io.h
index 49e5692c..7ebec24e 100644
--- a/disk-io.h
+++ b/disk-io.h
@@ -47,6 +47,7 @@ struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int writes);
struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
int writes);
int close_ctree(struct btrfs_root *root);
+int write_all_supers(struct btrfs_root *root);
int write_ctree_super(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr);