Btrfs: allow file data clone within a file

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We did not allow file data clone within the same file because of
deadlock issues.

However, we now use nested lock to avoid deadlock between the
parent directory and the child file.

So it's safe to do file clone within the same file when the two
ranges are not overlapped.

Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

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Liu Bo 2013-05-26 13:50:31 +00:00 • committed by Josef Bacik

parent b7394eb91c

commit a96fbc7288

1 changed files with 19 additions and 7 deletions

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26

fs/btrfs/ioctl.c

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