CIFS: Add SMB2 support for hardlink operation

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 28 insertions, 6 deletions

diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index a6952bafe331..1921c9c87ccd 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -78,6 +78,10 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
                 tmprc = SMB2_rename(xid, tcon, persistent_fid, volatile_fid,
                                     (__le16 *)data);
                 break;
+        case SMB2_OP_HARDLINK:
+                tmprc = SMB2_set_hardlink(xid, tcon, persistent_fid,
+                                          volatile_fid, (__le16 *)data);
+                break;
         default:
                 cERROR(1, "Invalid command");
                 break;
@@ -175,10 +179,10 @@ smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
                                   SMB2_OP_DELETE);
 }
 
-int
-smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
-                 const char *from_name, const char *to_name,
-                 struct cifs_sb_info *cifs_sb)
+static int
+smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
+                   const char *from_name, const char *to_name,
+                   struct cifs_sb_info *cifs_sb, __u32 access, int command)
 {
         __le16 *smb2_to_name = NULL;
         int rc;
@@ -189,9 +193,27 @@ smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
                 goto smb2_rename_path;
         }
 
-        rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, DELETE,
-                                FILE_OPEN, 0, 0, smb2_to_name, SMB2_OP_RENAME);
+        rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
+                                FILE_OPEN, 0, 0, smb2_to_name, command);
 smb2_rename_path:
         kfree(smb2_to_name);
         return rc;
 }
+
+int
+smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
+                 const char *from_name, const char *to_name,
+                 struct cifs_sb_info *cifs_sb)
+{
+        return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
+                                  DELETE, SMB2_OP_RENAME);
+}
+
+int
+smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+                     const char *from_name, const char *to_name,
+                     struct cifs_sb_info *cifs_sb)
+{
+        return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
+                                  FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
+}