tree 2cac01aab4083ea3e9c3dae5ee7665a16e923190
parent f0bc4d134b46607967bda1205ce3226a1bd95f42
author Darrick J. Wong <darrick.wong@oracle.com> 1475511103 -0700
committer Darrick J. Wong <darrick.wong@oracle.com> 1475709986 -0700

xfs: unshare a range of blocks via fallocate

Unshare all shared extents if the user calls fallocate with the new
unshare mode flag set, so that we can guarantee that a subsequent
write will not ENOSPC.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
[hch: pass inode instead of file to xfs_reflink_dirty_range,
      use iomap infrastructure for copy up]
Signed-off-by: Christoph Hellwig <hch@lst.de>