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authorDave Chinner <dchinner@redhat.com>2012-06-22 18:50:10 +1000
committerBen Myers <bpm@sgi.com>2012-07-01 14:50:05 -0500
commit6dde27077eaf590eac279627f74b7e4e40b864b2 (patch)
tree0556e1118b68fc251c33ba650a0ffc75e7caa8d9 /fs/xfs/xfs_buf.h
parent3e85c868a697805a3d4c7800a6bacdfc81d15cdf (diff)
downloadvexpress-lsk-6dde27077eaf590eac279627f74b7e4e40b864b2.tar.gz
xfs: add discontiguous buffer map interface
With the internal interfaces supporting discontiguous buffer maps, add external lookup, read and get interfaces so they can start to be used. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_buf.h')
-rw-r--r--fs/xfs/xfs_buf.h46
1 files changed, 40 insertions, 6 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 67d134994ae..aa96bd410ae 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -184,12 +184,46 @@ xfs_buf_alloc(
return _xfs_buf_alloc(target, &map, 1, flags);
}
-struct xfs_buf *xfs_buf_get(struct xfs_buftarg *target, xfs_daddr_t blkno,
- size_t numblks, xfs_buf_flags_t flags);
-struct xfs_buf *xfs_buf_read(struct xfs_buftarg *target, xfs_daddr_t blkno,
- size_t numblks, xfs_buf_flags_t flags);
-void xfs_buf_readahead(struct xfs_buftarg *target, xfs_daddr_t blkno,
- size_t numblks);
+struct xfs_buf *xfs_buf_get_map(struct xfs_buftarg *target,
+ struct xfs_buf_map *map, int nmaps,
+ 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);
+void xfs_buf_readahead_map(struct xfs_buftarg *target,
+ struct xfs_buf_map *map, int nmaps);
+
+static inline struct xfs_buf *
+xfs_buf_get(
+ struct xfs_buftarg *target,
+ xfs_daddr_t blkno,
+ size_t numblks,
+ xfs_buf_flags_t flags)
+{
+ DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
+ return xfs_buf_get_map(target, &map, 1, flags);
+}
+
+static inline struct xfs_buf *
+xfs_buf_read(
+ struct xfs_buftarg *target,
+ xfs_daddr_t blkno,
+ size_t numblks,
+ xfs_buf_flags_t flags)
+{
+ DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
+ return xfs_buf_read_map(target, &map, 1, flags);
+}
+
+static inline void
+xfs_buf_readahead(
+ struct xfs_buftarg *target,
+ xfs_daddr_t blkno,
+ size_t numblks)
+{
+ DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
+ return xfs_buf_readahead_map(target, &map, 1);
+}
struct xfs_buf *xfs_buf_get_empty(struct xfs_buftarg *target, size_t numblks);
void xfs_buf_set_empty(struct xfs_buf *bp, size_t numblks);