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authorChristoph Hellwig <hch@lst.de>2016-12-10 03:17:19 +0300
committerDarrick J. Wong <darrick.wong@oracle.com>2016-12-10 03:17:19 +0300
commita76b5b04375f974579c83433b06466758c0c552c (patch)
treee90308681a4571301e7bbf9e1e95b1eb579c911b /arch/m32r
parent3e5de27e940d00d8d504dfb96625fb654f641509 (diff)
downloadlinux-a76b5b04375f974579c83433b06466758c0c552c.tar.xz
fs: try to clone files first in vfs_copy_file_range
A clone is a perfectly fine implementation of a file copy, so most file systems just implement the copy that way. Instead of duplicating this logic move it to the VFS. Currently btrfs and XFS implement copies the same way as clones and there is no behavior change for them, cifs only implements clones and grow support for copy_file_range with this patch. NFS implements both, so this will allow copy_file_range to work on servers that only implement CLONE and be lot more efficient on servers that implements CLONE and COPY. Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/m32r')
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