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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-05-24 19:47:14 +0200 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-06-10 16:41:12 +0200 |
| commit | c3a7abf06ce719a51139e62a034590be99abbc2c (patch) | |
| tree | 14d61bbd8c34d1b1c7997c9afad79158b7af2914 /fs/nilfs2/bmap.c | |
| parent | nilfs2: add sync_page method to page caches of meta data (diff) | |
| download | linux-c3a7abf06ce719a51139e62a034590be99abbc2c.tar.xz linux-c3a7abf06ce719a51139e62a034590be99abbc2c.zip | |
nilfs2: support contiguous lookup of blocks
Although get_block() callback function can return extent of contiguous
blocks with bh->b_size, nilfs_get_block() function did not support
this feature.
This adds contiguous lookup feature to the block mapping codes of
nilfs, and allows the nilfs_get_blocks() function to return the extent
information by applying the feature.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/bmap.c')
| -rw-r--r-- | fs/nilfs2/bmap.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c index 51824c764294..36df60b6d8a4 100644 --- a/fs/nilfs2/bmap.c +++ b/fs/nilfs2/bmap.c @@ -31,7 +31,7 @@ #include "dat.h" #include "alloc.h" -static struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *bmap) +struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *bmap) { return nilfs_dat_inode(NILFS_I_NILFS(bmap->b_inode)); } @@ -58,6 +58,16 @@ int nilfs_bmap_lookup_at_level(struct nilfs_bmap *bmap, __u64 key, int level, return ret; } +int nilfs_bmap_lookup_contig(struct nilfs_bmap *bmap, __u64 key, __u64 *ptrp, + unsigned maxblocks) +{ + int ret; + + down_read(&bmap->b_sem); + ret = bmap->b_ops->bop_lookup_contig(bmap, key, ptrp, maxblocks); + up_read(&bmap->b_sem); + return ret; +} /** * nilfs_bmap_lookup - find a record |