*/
#define XFS_BSTATE_DISPOSE (1 << 0) /* buffer being discarded */
+/*
+ * The xfs_buftarg contains 2 notions of "sector size" -
+ *
+ * 1) The metadata sector size, which is the minimum unit and
+ * alignment of IO which will be performed by metadata operations.
+ * 2) The device logical sector size
+ *
+ * The first is specified at mkfs time, and is stored on-disk in the
+ * superblock's sb_sectsize.
+ *
+ * The latter is derived from the underlying device, and controls direct IO
+ * alignment constraints.
+ */
typedef struct xfs_buftarg {
dev_t bt_dev;
struct block_device *bt_bdev;
struct backing_dev_info *bt_bdi;
struct xfs_mount *bt_mount;
- unsigned int bt_bsize;
- unsigned int bt_sshift;
- size_t bt_smask;
+ unsigned int bt_meta_sectorsize;
+ size_t bt_meta_sectormask;
+ size_t bt_logical_sectorsize;
+ size_t bt_logical_sectormask;
/* LRU control structures */
struct shrinker bt_shrinker;