Commit d7776591 authored Jul 09, 2020 by Christoph Hellwig Committed by David Sterba Jul 09, 2020

btrfs: wire up iter_file_splice_write



btrfs implements the iter_write op and thus can use the more efficient
iov_iter based splice implementation.  For now falling back to the less
efficient default is pretty harmless, but I have a pending series that
removes the default, and thus would cause btrfs to not support splice
at all.

Reported-by: Andy Lavr <andy.lavr@gmail.com>
Tested-by: Andy Lavr <andy.lavr@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

parent 230ed397

fs/btrfs/file.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -3509,6 +3509,7 @@ const struct file_operations btrfs_file_operations = {
		.read_iter = generic_file_read_iter,
		.splice_read = generic_file_splice_read,
		.write_iter = btrfs_file_write_iter,
		.splice_write = iter_file_splice_write,
		.mmap = btrfs_file_mmap,
		.open = btrfs_file_open,
		.release = btrfs_release_file,

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