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-rw-r--r--fs/btrfs/volumes.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 93854609a4..66e6fc481e 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -92,6 +92,9 @@ enum btrfs_raid_types {
#define BTRFS_DEV_STATE_FLUSH_SENT (4)
#define BTRFS_DEV_STATE_NO_READA (5)
+/* Special value encoding failure to write primary super block. */
+#define BTRFS_SUPER_PRIMARY_WRITE_ERROR (INT_MAX / 2)
+
struct btrfs_fs_devices;
struct btrfs_device {
@@ -142,6 +145,12 @@ struct btrfs_device {
/* type and info about this device */
u64 type;
+ /*
+ * Counter of super block write errors, values larger than
+ * BTRFS_SUPER_PRIMARY_WRITE_ERROR encode primary super block write failure.
+ */
+ atomic_t sb_write_errors;
+
/* minimal io size for this device */
u32 sector_size;
@@ -743,7 +752,6 @@ struct btrfs_chunk_map *btrfs_alloc_chunk_map(int num_stripes, gfp_t gfp);
int btrfs_add_chunk_map(struct btrfs_fs_info *fs_info, struct btrfs_chunk_map *map);
#endif
-struct btrfs_chunk_map *btrfs_clone_chunk_map(struct btrfs_chunk_map *map, gfp_t gfp);
struct btrfs_chunk_map *btrfs_find_chunk_map(struct btrfs_fs_info *fs_info,
u64 logical, u64 length);
struct btrfs_chunk_map *btrfs_find_chunk_map_nolock(struct btrfs_fs_info *fs_info,