diff options
Diffstat (limited to 'fs/xfs/xfs_buf_item.h')
| -rw-r--r-- | fs/xfs/xfs_buf_item.h | 92 |
1 files changed, 53 insertions, 39 deletions
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h index 640adcfa4143..2573d2a75fc8 100644 --- a/fs/xfs/xfs_buf_item.h +++ b/fs/xfs/xfs_buf_item.h @@ -39,45 +39,6 @@ extern kmem_zone_t *xfs_buf_item_zone; #define XFS_BLF_PDQUOT_BUF (1<<3) #define XFS_BLF_GDQUOT_BUF (1<<4) -/* - * all buffers now need flags to tell recovery where the magic number - * is so that it can verify and calculate the CRCs on the buffer correctly - * once the changes have been replayed into the buffer. - */ -#define XFS_BLF_BTREE_BUF (1<<5) -#define XFS_BLF_AGF_BUF (1<<6) -#define XFS_BLF_AGFL_BUF (1<<7) -#define XFS_BLF_AGI_BUF (1<<8) -#define XFS_BLF_DINO_BUF (1<<9) -#define XFS_BLF_SYMLINK_BUF (1<<10) -#define XFS_BLF_DIR_BLOCK_BUF (1<<11) -#define XFS_BLF_DIR_DATA_BUF (1<<12) -#define XFS_BLF_DIR_FREE_BUF (1<<13) -#define XFS_BLF_DIR_LEAF1_BUF (1<<14) -#define XFS_BLF_DIR_LEAFN_BUF (1<<15) -#define XFS_BLF_DA_NODE_BUF (1<<16) -#define XFS_BLF_ATTR_LEAF_BUF (1<<17) -#define XFS_BLF_ATTR_RMT_BUF (1<<18) - -#define XFS_BLF_TYPE_MASK \ - (XFS_BLF_UDQUOT_BUF | \ - XFS_BLF_PDQUOT_BUF | \ - XFS_BLF_GDQUOT_BUF | \ - XFS_BLF_BTREE_BUF | \ - XFS_BLF_AGF_BUF | \ - XFS_BLF_AGFL_BUF | \ - XFS_BLF_AGI_BUF | \ - XFS_BLF_DINO_BUF | \ - XFS_BLF_SYMLINK_BUF | \ - XFS_BLF_DIR_BLOCK_BUF | \ - XFS_BLF_DIR_DATA_BUF | \ - XFS_BLF_DIR_FREE_BUF | \ - XFS_BLF_DIR_LEAF1_BUF | \ - XFS_BLF_DIR_LEAFN_BUF | \ - XFS_BLF_DA_NODE_BUF | \ - XFS_BLF_ATTR_LEAF_BUF | \ - XFS_BLF_ATTR_RMT_BUF) - #define XFS_BLF_CHUNK 128 #define XFS_BLF_SHIFT 7 #define BIT_TO_WORD_SHIFT 5 @@ -101,6 +62,55 @@ typedef struct xfs_buf_log_format { } xfs_buf_log_format_t; /* + * All buffers now need to tell recovery where the magic number + * is so that it can verify and calculate the CRCs on the buffer correctly + * once the changes have been replayed into the buffer. + * + * The type value is held in the upper 5 bits of the blf_flags field, which is + * an unsigned 16 bit field. Hence we need to shift it 11 bits up and down. + */ +#define XFS_BLFT_BITS 5 +#define XFS_BLFT_SHIFT 11 +#define XFS_BLFT_MASK (((1 << XFS_BLFT_BITS) - 1) << XFS_BLFT_SHIFT) + +enum xfs_blft { + XFS_BLFT_UNKNOWN_BUF = 0, + XFS_BLFT_UDQUOT_BUF, + XFS_BLFT_PDQUOT_BUF, + XFS_BLFT_GDQUOT_BUF, + XFS_BLFT_BTREE_BUF, + XFS_BLFT_AGF_BUF, + XFS_BLFT_AGFL_BUF, + XFS_BLFT_AGI_BUF, + XFS_BLFT_DINO_BUF, + XFS_BLFT_SYMLINK_BUF, + XFS_BLFT_DIR_BLOCK_BUF, + XFS_BLFT_DIR_DATA_BUF, + XFS_BLFT_DIR_FREE_BUF, + XFS_BLFT_DIR_LEAF1_BUF, + XFS_BLFT_DIR_LEAFN_BUF, + XFS_BLFT_DA_NODE_BUF, + XFS_BLFT_ATTR_LEAF_BUF, + XFS_BLFT_ATTR_RMT_BUF, + XFS_BLFT_SB_BUF, + XFS_BLFT_MAX_BUF = (1 << XFS_BLFT_BITS), +}; + +static inline void +xfs_blft_to_flags(struct xfs_buf_log_format *blf, enum xfs_blft type) +{ + ASSERT(type > XFS_BLFT_UNKNOWN_BUF && type < XFS_BLFT_MAX_BUF); + blf->blf_flags &= ~XFS_BLFT_MASK; + blf->blf_flags |= ((type << XFS_BLFT_SHIFT) & XFS_BLFT_MASK); +} + +static inline __uint16_t +xfs_blft_from_flags(struct xfs_buf_log_format *blf) +{ + return (blf->blf_flags & XFS_BLFT_MASK) >> XFS_BLFT_SHIFT; +} + +/* * buf log item flags */ #define XFS_BLI_HOLD 0x01 @@ -153,6 +163,10 @@ void xfs_buf_attach_iodone(struct xfs_buf *, void xfs_buf_iodone_callbacks(struct xfs_buf *); void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *); +void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *, + enum xfs_blft); +void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp, struct xfs_buf *src_bp); + #endif /* __KERNEL__ */ #endif /* __XFS_BUF_ITEM_H__ */ |