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ext4: add physical block and status member into extent status tree

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This commit adds two members in extent_status structure to let it record
physical block and extent status.  Here es_pblk is used to record both
of them because physical block only has 48 bits.  So extent status could
be stashed into it so that we can save some memory.  Now written,
unwritten, delayed and hole are defined as status.

Due to new member is added into extent status tree, all interfaces need
to be adjusted.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Zheng Liu
2013-02-18 00:26:51 -05:00
committed by Theodore Ts'o
parent 06b0c88621
commit fdc0212e86
4 changed files with 142 additions and 26 deletions
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3
fs/ext4/inode.c
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@@ -1784,7 +1784,8 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
goto out_unlock;
}
retval = ext4_es_insert_extent(inode, map->m_lblk, map->m_len);
retval = ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
~0, EXTENT_STATUS_DELAYED);
if (retval)
goto out_unlock;