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| author | Dave Chinner <dchinner@redhat.com> | 2012-06-22 10:50:10 +0200 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2012-07-01 21:50:05 +0200 |
| commit | 6dde27077eaf590eac279627f74b7e4e40b864b2 (patch) | |
| tree | 0556e1118b68fc251c33ba650a0ffc75e7caa8d9 /fs/xfs/xfs_buf.h | |
| parent | xfs: convert internal buffer functions to pass maps (diff) | |
| download | linux-6dde27077eaf590eac279627f74b7e4e40b864b2.tar.xz linux-6dde27077eaf590eac279627f74b7e4e40b864b2.zip | |
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.h | 46 |
1 files changed, 40 insertions, 6 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 67d134994ae4..aa96bd410aed 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); |