diff options
| author | Christoph Hellwig <hch@lst.de> | 2016-12-09 16:17:19 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2016-12-09 16:17:19 -0800 |
| commit | a76b5b04375f974579c83433b06466758c0c552c (patch) | |
| tree | e90308681a4571301e7bbf9e1e95b1eb579c911b /fs/btrfs/ioctl.c | |
| parent | 3e5de27e940d00d8d504dfb96625fb654f641509 (diff) | |
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 'fs/btrfs/ioctl.c')
| -rw-r--r-- | fs/btrfs/ioctl.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 7acbd2cf6192..dab746298758 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3980,18 +3980,6 @@ out_unlock: return ret; } -ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, - struct file *file_out, loff_t pos_out, - size_t len, unsigned int flags) -{ - ssize_t ret; - - ret = btrfs_clone_files(file_out, file_in, pos_in, len, pos_out); - if (ret == 0) - ret = len; - return ret; -} - int btrfs_clone_file_range(struct file *src_file, loff_t off, struct file *dst_file, loff_t destoff, u64 len) { |