ceph: use copy-from2 op in copy_file_range

Instead of using the copy-from operation, switch copy_file_range to the
new copy-from2 operation, which allows to send the truncate_seq and
truncate_size parameters.

If an OSD does not support the copy-from2 operation it will return
-EOPNOTSUPP.  In that case, the kernel client will stop trying to do
remote object copies for this fs client and will always use the generic
VFS copy_file_range.

Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 3bf1a01cd536..1e456a9011bb 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -106,6 +106,8 @@ struct ceph_fs_client {
 	unsigned long last_auto_reconnect;
 	bool blacklisted;
 
+	bool have_copy_from2;
+
 	u32 filp_gen;
 	loff_t max_file_size;