tree 3cac0c18d0cacc316e0e8a60f483282d6f991779
parent 89488984ac23b0580f959b9ee549f2fcb1c2f194
author Mark Fasheh <mark.fasheh@oracle.com> 1171081452 -0800
committer Mark Fasheh <mark.fasheh@oracle.com> 1177624928 -0700

ocfs2: teach ocfs2_file_aio_write() about sparse files

Unfortunately, ocfs2 can no longer make use of generic_file_aio_write_nlock()
because allocating writes will require zeroing of pages adjacent to the I/O
for cluster sizes greater than page size.

Implement a custom file write here, which can order page locks for zeroing.
This also has the advantage that cluster locks can easily be ordered outside
of the page locks.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>