tree 3cc14a71010b454f6524006e973147837f040a39
parent f8e6cc013b896d75d6ce4ec9e168014af1257fd8
author Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1279417343 +0900
committer Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1279846935 +0900

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>