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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-05-24 21:47:14 +0400
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-06-10 18:41:12 +0400
commitc3a7abf06ce719a51139e62a034590be99abbc2c (patch)
tree14d61bbd8c34d1b1c7997c9afad79158b7af2914 /fs/nilfs2/bmap.c
parentfa032744ad41de1b0a1807e7c379c6196e72ad80 (diff)
downloadlinux-c3a7abf06ce719a51139e62a034590be99abbc2c.tar.xz
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.c12
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