diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_format.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_format.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 8b826102dfe3..777fa974a319 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -1375,7 +1375,8 @@ struct xfs_owner_info { #define XFS_RMAP_OWN_INOBT (-6ULL) /* Inode btree blocks */ #define XFS_RMAP_OWN_INODES (-7ULL) /* Inode chunk */ #define XFS_RMAP_OWN_REFC (-8ULL) /* refcount tree */ -#define XFS_RMAP_OWN_MIN (-9ULL) /* guard */ +#define XFS_RMAP_OWN_COW (-9ULL) /* cow allocations */ +#define XFS_RMAP_OWN_MIN (-10ULL) /* guard */ #define XFS_RMAP_NON_INODE_OWNER(owner) (!!((owner) & (1ULL << 63))) @@ -1477,6 +1478,17 @@ unsigned int xfs_refc_block(struct xfs_mount *mp); * data) are not tracked here. Free space is also not tracked here. * This is consistent with pre-reflink XFS. */ + +/* + * Extents that are being used to stage a copy on write are stored + * in the refcount btree with a refcount of 1 and the upper bit set + * on the startblock. This speeds up mount time deletion of stale + * staging extents because they're all at the right side of the tree. + */ +#define XFS_REFC_COW_START ((xfs_agblock_t)(1U << 31)) +#define REFCNTBT_COWFLAG_BITLEN 1 +#define REFCNTBT_AGBLOCK_BITLEN 31 + struct xfs_refcount_rec { __be32 rc_startblock; /* starting block number */ __be32 rc_blockcount; /* count of blocks */ |