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authorSteve French <steve.french@primarydata.com>2015-06-28 07:18:36 +0300
committerSteve French <steve.french@primarydata.com>2015-06-29 05:15:38 +0300
commit02b1666544c08e245cb4e2253ed575f8128943d6 (patch)
treeed2967b35329e08bf327c1985104ec06016c96b8 /fs/cifs/ioctl.c
parentaab1893d5fbeb7c931e97189f54a71ab0ecbf4c7 (diff)
downloadlinux-02b1666544c08e245cb4e2253ed575f8128943d6.tar.xz
Add reflink copy over SMB3.11 with new FSCTL_DUPLICATE_EXTENTS
Getting fantastic copy performance with cp --reflink over SMB3.11 using the new FSCTL_DUPLICATE_EXTENTS. This FSCTL was added in the SMB3.11 dialect (testing was against REFS file system) so have put it as a 3.11 protocol specific operation ("vers=3.1.1" on the mount). Tested at the SMB3 plugfest in Redmond. It depends on the new FS Attribute (BLOCK_REFCOUNTING) which is used to advertise support for the ability to do this ioctl (if you can support multiple files pointing to the same block than this refcounting ability or equivalent is needed to support the new reflink-like duplicate extent SMB3 ioctl. Signed-off-by: Steve French <steve.french@primarydata.com>
Diffstat (limited to 'fs/cifs/ioctl.c')
-rw-r--r--fs/cifs/ioctl.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index 8b7898b7670f..7843b19ef5be 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -31,12 +31,14 @@
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifsfs.h"
+#include <linux/btrfs.h>
#define CIFS_IOCTL_MAGIC 0xCF
#define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int)
static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
- unsigned long srcfd, u64 off, u64 len, u64 destoff)
+ unsigned long srcfd, u64 off, u64 len, u64 destoff,
+ bool dup_extents)
{
int rc;
struct cifsFileInfo *smb_file_target = dst_file->private_data;
@@ -109,9 +111,14 @@ static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
truncate_inode_pages_range(&target_inode->i_data, destoff,
PAGE_CACHE_ALIGN(destoff + len)-1);
- if (target_tcon->ses->server->ops->clone_range)
+ if (dup_extents && target_tcon->ses->server->ops->duplicate_extents)
+ rc = target_tcon->ses->server->ops->duplicate_extents(xid,
+ smb_file_src, smb_file_target, off, len, destoff);
+ else if (!dup_extents && target_tcon->ses->server->ops->clone_range)
rc = target_tcon->ses->server->ops->clone_range(xid,
smb_file_src, smb_file_target, off, len, destoff);
+ else
+ rc = -EOPNOTSUPP;
/* force revalidate of size and timestamps of target file now
that target is updated on the server */
@@ -205,7 +212,10 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
}
break;
case CIFS_IOC_COPYCHUNK_FILE:
- rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0);
+ rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, false);
+ break;
+ case BTRFS_IOC_CLONE:
+ rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, true);
break;
default:
cifs_dbg(FYI, "unsupported ioctl\n");