CIFS: Add SMB2 support for hardlink operation
[linux-3.10.git] / fs / cifs / smb2pdu.c
index 1dc11ce..a684c4a 100644 (file)
@@ -1709,3 +1709,34 @@ SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
        kfree(data);
        return rc;
 }
+
+int
+SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+                 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
+{
+       struct smb2_file_link_info info;
+       void **data;
+       unsigned int size[2];
+       int rc;
+       int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
+
+       data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
+       if (!data)
+               return -ENOMEM;
+
+       info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
+                             /* 0 = fail if link already exists */
+       info.RootDirectory = 0;  /* MBZ for network ops (why does spec say?) */
+       info.FileNameLength = cpu_to_le32(len);
+
+       data[0] = &info;
+       size[0] = sizeof(struct smb2_file_link_info);
+
+       data[1] = target_file;
+       size[1] = len + 2 /* null */;
+
+       rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
+                          FILE_LINK_INFORMATION, 2, data, size);
+       kfree(data);
+       return rc;
+}