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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-07-18 10:42:23 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-07-23 10:02:15 +0900
commit26dfdd8e29f28c08aa67861b3c83d0f3f7d30cee (patch)
tree3cc14a71010b454f6524006e973147837f040a39 /fs/nilfs2/btree.c
parentf8e6cc013b896d75d6ce4ec9e168014af1257fd8 (diff)
downloadop-kernel-dev-26dfdd8e29f28c08aa67861b3c83d0f3f7d30cee.zip
op-kernel-dev-26dfdd8e29f28c08aa67861b3c83d0f3f7d30cee.tar.gz
nilfs2: add read ahead mode to nilfs_btnode_submit_block
This adds mode argument to nilfs_btnode_submit_block() function and allows it to issue a read-ahead request. An optional submit_ptr argument is also added to store the actual block address for which bio is sent. submit_ptr is used for a series of read-ahead requests, and helps to decide if each requested block is continous to the previous one on disk. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/btree.c')
-rw-r--r--fs/nilfs2/btree.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c
index 6462c70..4669389 100644
--- a/fs/nilfs2/btree.c
+++ b/fs/nilfs2/btree.c
@@ -71,9 +71,10 @@ static int nilfs_btree_get_block(const struct nilfs_bmap *btree, __u64 ptr,
{
struct address_space *btnc = &NILFS_BMAP_I(btree)->i_btnode_cache;
struct buffer_head *bh;
+ sector_t pbn = 0;
int err;
- err = nilfs_btnode_submit_block(btnc, ptr, 0, bhp);
+ err = nilfs_btnode_submit_block(btnc, ptr, pbn, READ, bhp, &pbn);
if (err)
return err == -EEXIST ? 0 : err;
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