diff options
Diffstat (limited to 'fs/xfs/xfs_buf.h')
| -rw-r--r-- | fs/xfs/xfs_buf.h | 48 |
1 files changed, 30 insertions, 18 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 050c53b739e2..755b652e695a 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -18,6 +18,7 @@ /* * Base types */ +struct xfs_buf; #define XFS_BUF_DADDR_NULL ((xfs_daddr_t) (-1LL)) @@ -30,15 +31,20 @@ #define XBF_STALE (1 << 6) /* buffer has been staled, do not find it */ #define XBF_WRITE_FAIL (1 << 7) /* async writes have failed on this buffer */ -/* flags used only as arguments to access routines */ -#define XBF_TRYLOCK (1 << 16)/* lock requested, but do not wait */ -#define XBF_UNMAPPED (1 << 17)/* do not map the buffer */ +/* buffer type flags for write callbacks */ +#define _XBF_INODES (1 << 16)/* inode buffer */ +#define _XBF_DQUOTS (1 << 17)/* dquot buffer */ +#define _XBF_LOGRECOVERY (1 << 18)/* log recovery buffer */ /* flags used only internally */ #define _XBF_PAGES (1 << 20)/* backed by refcounted pages */ #define _XBF_KMEM (1 << 21)/* backed by heap memory */ #define _XBF_DELWRI_Q (1 << 22)/* buffer on a delwri queue */ +/* flags used only as arguments to access routines */ +#define XBF_TRYLOCK (1 << 30)/* lock requested, but do not wait */ +#define XBF_UNMAPPED (1 << 31)/* do not map the buffer */ + typedef unsigned int xfs_buf_flags_t; #define XFS_BUF_FLAGS \ @@ -50,12 +56,15 @@ typedef unsigned int xfs_buf_flags_t; { XBF_DONE, "DONE" }, \ { XBF_STALE, "STALE" }, \ { XBF_WRITE_FAIL, "WRITE_FAIL" }, \ - { XBF_TRYLOCK, "TRYLOCK" }, /* should never be set */\ - { XBF_UNMAPPED, "UNMAPPED" }, /* ditto */\ + { _XBF_INODES, "INODES" }, \ + { _XBF_DQUOTS, "DQUOTS" }, \ + { _XBF_LOGRECOVERY, "LOG_RECOVERY" }, \ { _XBF_PAGES, "PAGES" }, \ { _XBF_KMEM, "KMEM" }, \ - { _XBF_DELWRI_Q, "DELWRI_Q" } - + { _XBF_DELWRI_Q, "DELWRI_Q" }, \ + /* The following interface flags should never be set */ \ + { XBF_TRYLOCK, "TRYLOCK" }, \ + { XBF_UNMAPPED, "UNMAPPED" } /* * Internal state flags. @@ -94,10 +103,6 @@ typedef struct xfs_buftarg { struct ratelimit_state bt_ioerror_rl; } xfs_buftarg_t; -struct xfs_buf; -typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); - - #define XB_PAGES 2 struct xfs_buf_map { @@ -150,7 +155,6 @@ typedef struct xfs_buf { xfs_buftarg_t *b_target; /* buffer target (device) */ void *b_addr; /* virtual address of buffer */ struct work_struct b_ioend_work; - xfs_buf_iodone_t b_iodone; /* I/O completion function */ struct completion b_iowait; /* queue for I/O waiters */ struct xfs_buf_log_item *b_log_item; struct list_head b_li_list; /* Log items list head */ @@ -257,9 +261,23 @@ extern void xfs_buf_unlock(xfs_buf_t *); #define xfs_buf_islocked(bp) \ ((bp)->b_sema.count <= 0) +static inline void xfs_buf_relse(xfs_buf_t *bp) +{ + xfs_buf_unlock(bp); + xfs_buf_rele(bp); +} + /* Buffer Read and Write Routines */ extern int xfs_bwrite(struct xfs_buf *bp); extern void xfs_buf_ioend(struct xfs_buf *bp); +static inline void xfs_buf_ioend_finish(struct xfs_buf *bp) +{ + if (bp->b_flags & XBF_ASYNC) + xfs_buf_relse(bp); + else + complete(&bp->b_iowait); +} + extern void __xfs_buf_ioerror(struct xfs_buf *bp, int error, xfs_failaddr_t failaddr); #define xfs_buf_ioerror(bp, err) __xfs_buf_ioerror((bp), (err), __this_address) @@ -324,12 +342,6 @@ static inline int xfs_buf_ispinned(struct xfs_buf *bp) return atomic_read(&bp->b_pin_count); } -static inline void xfs_buf_relse(xfs_buf_t *bp) -{ - xfs_buf_unlock(bp); - xfs_buf_rele(bp); -} - static inline int xfs_buf_verify_cksum(struct xfs_buf *bp, unsigned long cksum_offset) { |