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(parent: 77d61fe) | patch
xfs: map an inode's offset to an exact physical block
authorDarrick J. Wong <darrick.wong@oracle.com>
Mon, 3 Oct 2016 16:11:27 +0000 (09:11 -0700)
committerDarrick J. Wong <darrick.wong@oracle.com>
Tue, 4 Oct 2016 18:05:44 +0000 (11:05 -0700)
commitf65306ea5246ef3ff68a6abf85f5a73a04903366
tree2c2f8ae61ce162c8c79cd5b8ea86266331ec83a6tree | snapshot
parent77d61fe45e720577a2cc0e9580fbc57d8faa7232commit | diff
xfs: map an inode's offset to an exact physical block

Teach the bmap routine to know how to map a range of file blocks to a
specific range of physical blocks, instead of simply allocating fresh
blocks.  This enables reflink to map a file to blocks that are already
in use.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
fs/xfs/libxfs/xfs_bmap.c diff | blob | history
fs/xfs/libxfs/xfs_bmap.h diff | blob | history
fs/xfs/xfs_trace.h diff | blob | history
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