xfs: convert buffer verifiers to an ops structure.

[deliverable/linux.git] / fs / xfs / xfs_buf.h

diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 7c0b6a0a1557c0d30db4b94e4bc27879d2614537..23f5642480bb1ea5f0f8a42423c607e7d61e9b83 100644 (file)
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -100,6 +100,7 @@ typedef struct xfs_buftarg {
 struct xfs_buf;
 typedef void (*xfs_buf_iodone_t)(struct xfs_buf *);
 
+
 #define XB_PAGES       2
 
 struct xfs_buf_map {
@@ -110,6 +111,11 @@ struct xfs_buf_map {
 #define DEFINE_SINGLE_BUF_MAP(map, blkno, numblk) \
        struct xfs_buf_map (map) = { .bm_bn = (blkno), .bm_len = (numblk) };
 
+struct xfs_buf_ops {
+       void (*verify_read)(struct xfs_buf *);
+       void (*verify_write)(struct xfs_buf *);
+};
+
 typedef struct xfs_buf {
        /*
         * first cacheline holds all the fields needed for an uncontended cache
@@ -153,13 +159,13 @@ typedef struct xfs_buf {
        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 */
+       const struct xfs_buf_ops        *b_ops;
 
 #ifdef XFS_BUF_LOCK_TRACKING
        int                     b_last_holder;
 #endif
 } xfs_buf_t;
 
-
 /* Finding and Reading Buffers */
 struct xfs_buf *_xfs_buf_find(struct xfs_buftarg *target,
                              struct xfs_buf_map *map, int nmaps,
@@ -196,9 +202,11 @@ struct xfs_buf *xfs_buf_get_map(struct xfs_buftarg *target,
                               xfs_buf_flags_t flags);
 struct xfs_buf *xfs_buf_read_map(struct xfs_buftarg *target,
                               struct xfs_buf_map *map, int nmaps,
-                              xfs_buf_flags_t flags);
+                              xfs_buf_flags_t flags,
+                              const struct xfs_buf_ops *ops);
 void xfs_buf_readahead_map(struct xfs_buftarg *target,
-                              struct xfs_buf_map *map, int nmaps);
+                              struct xfs_buf_map *map, int nmaps,
+                              const struct xfs_buf_ops *ops);
 
 static inline struct xfs_buf *
 xfs_buf_get(
@@ -216,20 +224,22 @@ xfs_buf_read(
        struct xfs_buftarg      *target,
        xfs_daddr_t             blkno,
        size_t                  numblks,
-       xfs_buf_flags_t         flags)
+       xfs_buf_flags_t         flags,
+       const struct xfs_buf_ops *ops)
 {
        DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
-       return xfs_buf_read_map(target, &map, 1, flags);
+       return xfs_buf_read_map(target, &map, 1, flags, ops);
 }
 
 static inline void
 xfs_buf_readahead(
        struct xfs_buftarg      *target,
        xfs_daddr_t             blkno,
-       size_t                  numblks)
+       size_t                  numblks,
+       const struct xfs_buf_ops *ops)
 {
        DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
-       return xfs_buf_readahead_map(target, &map, 1);
+       return xfs_buf_readahead_map(target, &map, 1, ops);
 }
 
 struct xfs_buf *xfs_buf_get_empty(struct xfs_buftarg *target, size_t numblks);
@@ -239,7 +249,8 @@ int xfs_buf_associate_memory(struct xfs_buf *bp, void *mem, size_t length);
 struct xfs_buf *xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks,
                                int flags);
 struct xfs_buf *xfs_buf_read_uncached(struct xfs_buftarg *target,
-                               xfs_daddr_t daddr, size_t numblks, int flags);
+                               xfs_daddr_t daddr, size_t numblks, int flags,
+                               const struct xfs_buf_ops *ops);
 void xfs_buf_hold(struct xfs_buf *bp);
 
 /* Releasing Buffers */