#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_FS_MANAGED (1 << 8) /* filesystem controls freeing memory */
#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 */
*/
#define _XBF_PAGE_LOCKED (1 << 22)
-/*
- * If we try a barrier write, but it fails we have to communicate
- * this to the upper layers. Unfortunately b_error gets overwritten
- * when the buffer is re-issued so we have to add another flag to
- * keep this information.
- */
-#define _XFS_BARRIER_FAILED (1 << 23)
-
typedef unsigned int xfs_buf_flags_t;
#define XFS_BUF_FLAGS \
{ XBF_DONE, "DONE" }, \
{ XBF_DELWRI, "DELWRI" }, \
{ XBF_STALE, "STALE" }, \
- { XBF_FS_MANAGED, "FS_MANAGED" }, \
{ XBF_ORDERED, "ORDERED" }, \
{ XBF_READ_AHEAD, "READ_AHEAD" }, \
{ XBF_LOCK, "LOCK" }, /* should never be set */\
{ _XBF_PAGES, "PAGES" }, \
{ _XBF_RUN_QUEUES, "RUN_QUEUES" }, \
{ _XBF_DELWRI_Q, "DELWRI_Q" }, \
- { _XBF_PAGE_LOCKED, "PAGE_LOCKED" }, \
- { _XFS_BARRIER_FAILED, "BARRIER_FAILED" }
+ { _XBF_PAGE_LOCKED, "PAGE_LOCKED" }
typedef enum {
dev_t bt_dev;
struct block_device *bt_bdev;
struct address_space *bt_mapping;
+ struct xfs_mount *bt_mount;
unsigned int bt_bsize;
unsigned int bt_sshift;
size_t bt_smask;
- /* per device buffer hash table */
- uint bt_hashshift;
- xfs_bufhash_t *bt_hash;
-
/* per device delwri queue */
struct task_struct *bt_task;
struct list_head bt_list;
#define XB_PAGES 2
typedef struct xfs_buf {
+ /*
+ * first cacheline holds all the fields needed for an uncontended cache
+ * hit to be fully processed. The semaphore straddles the cacheline
+ * boundary, but the counter and lock sits on the first cacheline,
+ * which is the only bit that is touched if we hit the semaphore
+ * fast-path on locking.
+ */
+ struct rb_node b_rbnode; /* rbtree node */
+ xfs_off_t b_file_offset; /* offset in file */
+ size_t b_buffer_length;/* size of buffer in bytes */
+ atomic_t b_hold; /* reference count */
+ xfs_buf_flags_t b_flags; /* status flags */
struct semaphore b_sema; /* semaphore for lockables */
- unsigned long b_queuetime; /* time buffer was queued */
- atomic_t b_pin_count; /* pin count */
+
wait_queue_head_t b_waiters; /* unpin waiters */
struct list_head b_list;
- xfs_buf_flags_t b_flags; /* status flags */
- struct list_head b_hash_list; /* hash table list */
- xfs_bufhash_t *b_hash; /* hash table list start */
+ struct xfs_perag *b_pag; /* contains rbtree root */
xfs_buftarg_t *b_target; /* buffer target (device) */
- atomic_t b_hold; /* reference count */
xfs_daddr_t b_bn; /* block number for I/O */
- xfs_off_t b_file_offset; /* offset in file */
- size_t b_buffer_length;/* size of buffer in bytes */
size_t b_count_desired;/* desired transfer size */
void *b_addr; /* virtual address of buffer */
struct work_struct b_iodone_work;
- atomic_t b_io_remaining; /* #outstanding I/O requests */
xfs_buf_iodone_t b_iodone; /* I/O completion function */
xfs_buf_relse_t b_relse; /* releasing function */
struct completion b_iowait; /* queue for I/O waiters */
void *b_fspriv;
void *b_fspriv2;
- struct xfs_mount *b_mount;
- unsigned short b_error; /* error code on I/O */
- unsigned int b_page_count; /* size of page array */
- unsigned int b_offset; /* page offset in first page */
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 */
+ atomic_t b_pin_count; /* pin count */
+ atomic_t b_io_remaining; /* #outstanding I/O requests */
+ unsigned int b_page_count; /* size of page array */
+ unsigned int b_offset; /* page offset in first page */
+ unsigned short b_error; /* error code on I/O */
#ifdef XFS_BUF_LOCK_TRACKING
int b_last_holder;
#endif
xfs_buf_flags_t);
extern xfs_buf_t *xfs_buf_get_empty(size_t, xfs_buftarg_t *);
-extern xfs_buf_t *xfs_buf_get_noaddr(size_t, xfs_buftarg_t *);
+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_readahead(xfs_buftarg_t *, xfs_off_t, size_t,
- xfs_buf_flags_t);
+extern void xfs_buf_readahead(xfs_buftarg_t *, xfs_off_t, size_t);
+struct xfs_buf *xfs_buf_read_uncached(struct xfs_mount *mp,
+ struct xfs_buftarg *target,
+ xfs_daddr_t daddr, size_t length, int flags);
/* Releasing Buffers */
extern void xfs_buf_free(xfs_buf_t *);
extern int xfs_buf_iowait(xfs_buf_t *);
extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *,
xfs_buf_rw_t);
+#define xfs_buf_zero(bp, off, len) \
+ xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO)
static inline int xfs_buf_geterror(xfs_buf_t *bp)
{
XFS_BUF_DONE(bp); \
} while (0)
-#define XFS_BUF_UNMANAGE(bp) ((bp)->b_flags &= ~XBF_FS_MANAGED)
-
#define XFS_BUF_DELAYWRITE(bp) ((bp)->b_flags |= XBF_DELWRI)
#define XFS_BUF_UNDELAYWRITE(bp) xfs_buf_delwri_dequeue(bp)
#define XFS_BUF_ISDELAYWRITE(bp) ((bp)->b_flags & XBF_DELWRI)
xfs_buf_rele(bp);
}
-#define xfs_biodone(bp) xfs_buf_ioend(bp, 0)
-
-#define xfs_biomove(bp, off, len, data, rw) \
- xfs_buf_iomove((bp), (off), (len), (data), \
- ((rw) == XBF_WRITE) ? XBRW_WRITE : XBRW_READ)
-
-#define xfs_biozero(bp, off, len) \
- xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO)
-
-#define xfs_iowait(bp) xfs_buf_iowait(bp)
-
-#define xfs_baread(target, rablkno, ralen) \
- xfs_buf_readahead((target), (rablkno), (ralen), XBF_DONT_BLOCK)
-
-
/*
* Handling of buftargs.
*/
-extern xfs_buftarg_t *xfs_alloc_buftarg(struct block_device *, int, const char *);
+extern xfs_buftarg_t *xfs_alloc_buftarg(struct xfs_mount *,
+ struct block_device *, int, const char *);
extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *);
extern void xfs_wait_buftarg(xfs_buftarg_t *);
extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int);
git.openpandora.org / pandora-kernel.git / blobdiff