Commit 1bb33a98 authored Dec 05, 2016 by Darrick J. Wong Committed by Dave Chinner Dec 05, 2016

xfs: don't cap maximum dedupe request length



After various discussions on linux-fsdevel, it has been decided that it
is not necessary to cap the length of a dedupe request, and that
correctly-written userspace client programs will be able to absorb the
change.  Therefore, remove the length clamping behavior.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

parent ef388e20

fs/xfs/xfs_file.c

+0 −9

Original line number	Diff line number	Diff line
		@@ -939,7 +939,6 @@ xfs_file_clone_range(
		len, false);
		}

		#define XFS_MAX_DEDUPE_LEN (16 * 1024 * 1024)
		STATIC ssize_t
		xfs_file_dedupe_range(
		struct file *src_file,
		@@ -950,14 +949,6 @@ xfs_file_dedupe_range(
		{
		int error;

		/*
		* Limit the total length we will dedupe for each operation.
		* This is intended to bound the total time spent in this
		* ioctl to something sane.
		*/
		if (len > XFS_MAX_DEDUPE_LEN)
		len = XFS_MAX_DEDUPE_LEN;

		error = xfs_reflink_remap_range(src_file, loff, dst_file, dst_loff,
		len, true);
		if (error)

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