From 26dfdd8e29f28c08aa67861b3c83d0f3f7d30cee Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Sun, 18 Jul 2010 10:42:23 +0900 Subject: 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 --- fs/nilfs2/btree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/nilfs2/btree.c') diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c index 6462c7026479..4669389bf686 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; -- cgit v1.2.3-58-ga151