tree f58e963b03034935429b42be735ee59cd06110e1
parent bf4ef67924d87b0addb32f084e83a9283496350e
author Chris Mason <chris.mason@oracle.com> 1210270316 -0400
committer Chris Mason <chris.mason@oracle.com> 1222355042 -0400

Btrfs: Update nodatacow mode to support cloned single files and resizing

Before, nodatacow only checked to make sure multiple roots didn't have
references on a single extent.  This check makes sure that multiple
inodes don't have references.

nodatacow needed an extra check to see if the block group was currently
readonly.  This way cows forced by the chunk relocation code are honored.

Signed-off-by: Chris Mason <chris.mason@oracle.com>