vfs: add a FALLOC_FL_UNSHARE mode to fallocate to unshare a range of blocks

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Add a new fallocate mode flag that explicitly unshares blocks on
filesystems that support such features.  The new flag can only
be used with an allocate-mode fallocate call.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

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Darrick J. Wong 2016-10-03 09:11:14 -07:00

parent 0a6eab8bd4

commit 71be6b4942

3 changed files with 25 additions and 1 deletions

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3

include/linux/falloc.h

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18

include/uapi/linux/falloc.h

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