#define XBF_READ (1 << 0) /* buffer intended for reading from device */
#define XBF_WRITE (1 << 1) /* buffer intended for writing to device */
-#define XBF_MAPPED (1 << 2) /* buffer mapped (b_addr valid) */
+#define XBF_READ_AHEAD (1 << 2) /* asynchronous read-ahead */
+#define XBF_MAPPED (1 << 3) /* buffer mapped (b_addr valid) */
#define XBF_ASYNC (1 << 4) /* initiator will not wait for completion */
#define XBF_DONE (1 << 5) /* all pages in the buffer uptodate */
#define XBF_DELWRI (1 << 6) /* buffer has dirty pages */
#define XBF_STALE (1 << 7) /* buffer has been staled, do not find it */
-#define XBF_ORDERED (1 << 11)/* use ordered writes */
-#define XBF_READ_AHEAD (1 << 12)/* asynchronous read-ahead */
-#define XBF_LOG_BUFFER (1 << 13)/* this is a buffer used for the log */
+
+/* I/O hints for the BIO layer */
+#define XBF_SYNCIO (1 << 10)/* treat this buffer as synchronous I/O */
+#define XBF_FUA (1 << 11)/* force cache write through mode */
+#define XBF_FLUSH (1 << 12)/* flush the disk cache before a write */
/* flags used only as arguments to access routines */
-#define XBF_LOCK (1 << 14)/* lock requested */
-#define XBF_TRYLOCK (1 << 15)/* lock requested, but do not wait */
-#define XBF_DONT_BLOCK (1 << 16)/* do not block in current thread */
+#define XBF_LOCK (1 << 15)/* lock requested */
+#define XBF_TRYLOCK (1 << 16)/* lock requested, but do not wait */
+#define XBF_DONT_BLOCK (1 << 17)/* do not block in current thread */
/* flags used only internally */
-#define _XBF_PAGES (1 << 18)/* backed by refcounted pages */
-#define _XBF_RUN_QUEUES (1 << 19)/* run block device task queue */
-#define _XBF_KMEM (1 << 20)/* backed by heap memory */
-#define _XBF_DELWRI_Q (1 << 21)/* buffer on delwri queue */
+#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 delwri queue */
typedef unsigned int xfs_buf_flags_t;
#define XFS_BUF_FLAGS \
{ XBF_READ, "READ" }, \
{ XBF_WRITE, "WRITE" }, \
+ { XBF_READ_AHEAD, "READ_AHEAD" }, \
{ XBF_MAPPED, "MAPPED" }, \
{ XBF_ASYNC, "ASYNC" }, \
{ XBF_DONE, "DONE" }, \
{ XBF_DELWRI, "DELWRI" }, \
{ XBF_STALE, "STALE" }, \
- { XBF_ORDERED, "ORDERED" }, \
- { XBF_READ_AHEAD, "READ_AHEAD" }, \
+ { XBF_SYNCIO, "SYNCIO" }, \
+ { XBF_FUA, "FUA" }, \
+ { XBF_FLUSH, "FLUSH" }, \
{ XBF_LOCK, "LOCK" }, /* should never be set */\
{ XBF_TRYLOCK, "TRYLOCK" }, /* ditto */\
{ XBF_DONT_BLOCK, "DONT_BLOCK" }, /* ditto */\
{ _XBF_PAGES, "PAGES" }, \
- { _XBF_RUN_QUEUES, "RUN_QUEUES" }, \
{ _XBF_KMEM, "KMEM" }, \
{ _XBF_DELWRI_Q, "DELWRI_Q" }
XBT_FORCE_FLUSH = 1,
} xfs_buftarg_flags_t;
-typedef struct xfs_bufhash {
- struct list_head bh_list;
- spinlock_t bh_lock;
-} xfs_bufhash_t;
-
typedef struct xfs_buftarg {
dev_t bt_dev;
struct block_device *bt_bdev;
xfs_buf_iodone_t b_iodone; /* I/O completion function */
struct completion b_iowait; /* queue for I/O waiters */
void *b_fspriv;
- void *b_fspriv2;
+ struct xfs_trans *b_transp;
struct page **b_pages; /* array of page pointers */
struct page *b_page_array[XB_PAGES]; /* inline pages */
unsigned long b_queuetime; /* time buffer was queued */
xfs_buf_flags_t);
extern xfs_buf_t *xfs_buf_get_empty(size_t, xfs_buftarg_t *);
+extern void xfs_buf_set_empty(struct xfs_buf *bp, size_t len);
extern xfs_buf_t *xfs_buf_get_uncached(struct xfs_buftarg *, size_t, int);
extern int xfs_buf_associate_memory(xfs_buf_t *, void *, size_t);
extern void xfs_buf_hold(xfs_buf_t *);
extern void xfs_buf_rele(xfs_buf_t *);
/* Locking and Unlocking Buffers */
-extern int xfs_buf_cond_lock(xfs_buf_t *);
-extern int xfs_buf_lock_value(xfs_buf_t *);
+extern int xfs_buf_trylock(xfs_buf_t *);
extern void xfs_buf_lock(xfs_buf_t *);
extern void xfs_buf_unlock(xfs_buf_t *);
+#define xfs_buf_islocked(bp) \
+ ((bp)->b_sema.count <= 0)
/* Buffer Read and Write Routines */
extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp);
({ char __b[BDEVNAME_SIZE]; bdevname((target)->bt_bdev, __b); __b; })
-#define XFS_BUF_BFLAGS(bp) ((bp)->b_flags)
-#define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \
- ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED))
+#define XFS_BUF_ZEROFLAGS(bp) \
+ ((bp)->b_flags &= ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI| \
+ XBF_SYNCIO|XBF_FUA|XBF_FLUSH))
void xfs_buf_stale(struct xfs_buf *bp);
#define XFS_BUF_STALE(bp) xfs_buf_stale(bp);
#define XFS_BUF_UNDELAYWRITE(bp) xfs_buf_delwri_dequeue(bp)
#define XFS_BUF_ISDELAYWRITE(bp) ((bp)->b_flags & XBF_DELWRI)
-#define XFS_BUF_ERROR(bp,no) xfs_buf_ioerror(bp,no)
-#define XFS_BUF_GETERROR(bp) xfs_buf_geterror(bp)
-#define XFS_BUF_ISERROR(bp) (xfs_buf_geterror(bp) ? 1 : 0)
-
#define XFS_BUF_DONE(bp) ((bp)->b_flags |= XBF_DONE)
#define XFS_BUF_UNDONE(bp) ((bp)->b_flags &= ~XBF_DONE)
#define XFS_BUF_ISDONE(bp) ((bp)->b_flags & XBF_DONE)
#define XFS_BUF_UNASYNC(bp) ((bp)->b_flags &= ~XBF_ASYNC)
#define XFS_BUF_ISASYNC(bp) ((bp)->b_flags & XBF_ASYNC)
-#define XFS_BUF_ORDERED(bp) ((bp)->b_flags |= XBF_ORDERED)
-#define XFS_BUF_UNORDERED(bp) ((bp)->b_flags &= ~XBF_ORDERED)
-#define XFS_BUF_ISORDERED(bp) ((bp)->b_flags & XBF_ORDERED)
-
#define XFS_BUF_HOLD(bp) xfs_buf_hold(bp)
#define XFS_BUF_READ(bp) ((bp)->b_flags |= XBF_READ)
#define XFS_BUF_UNREAD(bp) ((bp)->b_flags &= ~XBF_READ)
#define XFS_BUF_UNWRITE(bp) ((bp)->b_flags &= ~XBF_WRITE)
#define XFS_BUF_ISWRITE(bp) ((bp)->b_flags & XBF_WRITE)
-#define XFS_BUF_IODONE_FUNC(bp) ((bp)->b_iodone)
-#define XFS_BUF_SET_IODONE_FUNC(bp, func) ((bp)->b_iodone = (func))
-#define XFS_BUF_CLR_IODONE_FUNC(bp) ((bp)->b_iodone = NULL)
-
-#define XFS_BUF_FSPRIVATE(bp, type) ((type)(bp)->b_fspriv)
-#define XFS_BUF_SET_FSPRIVATE(bp, val) ((bp)->b_fspriv = (void*)(val))
-#define XFS_BUF_FSPRIVATE2(bp, type) ((type)(bp)->b_fspriv2)
-#define XFS_BUF_SET_FSPRIVATE2(bp, val) ((bp)->b_fspriv2 = (void*)(val))
#define XFS_BUF_SET_START(bp) do { } while (0)
#define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->b_addr)
#define XFS_BUF_ISPINNED(bp) atomic_read(&((bp)->b_pin_count))
-#define XFS_BUF_VALUSEMA(bp) xfs_buf_lock_value(bp)
-#define XFS_BUF_CPSEMA(bp) (xfs_buf_cond_lock(bp) == 0)
-#define XFS_BUF_VSEMA(bp) xfs_buf_unlock(bp)
-#define XFS_BUF_PSEMA(bp,x) xfs_buf_lock(bp)
#define XFS_BUF_FINISH_IOWAIT(bp) complete(&bp->b_iowait);
#define XFS_BUF_SET_TARGET(bp, target) ((bp)->b_target = (target))
projects / mirror_ubuntu-bionic-kernel.git / blobdiff