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authorDarrick J. Wong <darrick.wong@oracle.com>2018-10-30 10:42:10 +1100
committerDave Chinner <david@fromorbit.com>2018-10-30 10:42:10 +1100
commiteca3654e3cc7d93e9734d0fa96cfb15c7f356244 (patch)
tree00e5f8bd5de34435872d8cb222daaec79ede3961 /samples/v4l
parentdf3658361951e17364f1e1c3fa92862a990ad8bd (diff)
downloadlinux-eca3654e3cc7d93e9734d0fa96cfb15c7f356244.tar.bz2
vfs: enable remap callers that can handle short operations
Plumb in a remap flag that enables the filesystem remap handler to shorten remapping requests for callers that can handle it. Now copy_file_range can report partial success (in case we run up against alignment problems, resource limits, etc.). We also enable CAN_SHORTEN for fideduperange to maintain existing userspace-visible behavior where xfs/btrfs shorten the dedupe range to avoid stale post-eof data exposure. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
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