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Btrfs: Rewrite btrfs_drop_extents

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Rewrite btrfs_drop_extents by using btrfs_duplicate_item, so we can
avoid calling lock_extent within transaction.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng 2009-11-12 09:34:08 +00:00 • committed by Chris Mason
parent ad48fd7546
commit 920bbbfb05
5 changed files with 288 additions and 434 deletions
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3
fs/btrfs/ioctl.c
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@ -1027,8 +1027,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
BUG_ON(!trans);
/* punch hole in destination first */
btrfs_drop_extents(trans, root, inode, off, off + len,
off + len, 0, &hint_byte, 1);
btrfs_drop_extents(trans, inode, off, off + len, &hint_byte, 1);
/* clone data */
key.objectid = src->i_ino;