[PATCH v4 9/9] btrfs: btrfs_copy_file_range() only supports reflinks
From: Anna Schumaker <hidden>
Date: 2015-09-29 18:05:36
Also in:
linux-btrfs, linux-fsdevel, linux-nfs
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
Reject copies that don't have the COPY_FR_REFLINK flag set. Signed-off-by: Anna Schumaker <redacted> Reviewed-by: David Sterba <dsterba@suse.com> --- fs/btrfs/ioctl.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 4311554..2e14b91 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c@@ -44,6 +44,7 @@ #include <linux/uuid.h> #include <linux/btrfs.h> #include <linux/uaccess.h> +#include <linux/copy.h> #include "ctree.h" #include "disk-io.h" #include "transaction.h"
@@ -3848,6 +3849,9 @@ ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, { ssize_t ret; + if (!(flags & COPY_FR_REFLINK)) + return -EOPNOTSUPP; + ret = btrfs_clone_files(file_out, file_in, pos_in, len, pos_out); if (ret == 0) ret = len;
--
2.5.3