-/*
- * net/tipc/config.c: TIPC configuration management code
- *
- * Copyright (c) 2002-2006, Ericsson AB
- * Copyright (c) 2004-2007, 2010-2013, Wind River Systems
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the names of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "core.h"
-#include "socket.h"
-#include "name_table.h"
-#include "config.h"
-#include "server.h"
-
-#define REPLY_TRUNCATED "<truncated>\n"
-
-static const void *req_tlv_area; /* request message TLV area */
-static int req_tlv_space; /* request message TLV area size */
-static int rep_headroom; /* reply message headroom to use */
-
-struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
-{
- struct sk_buff *buf;
-
- buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
- if (buf)
- skb_reserve(buf, rep_headroom);
- return buf;
-}
-
-int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
- void *tlv_data, int tlv_data_size)
-{
- struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf);
- int new_tlv_space = TLV_SPACE(tlv_data_size);
-
- if (skb_tailroom(buf) < new_tlv_space)
- return 0;
- skb_put(buf, new_tlv_space);
- tlv->tlv_type = htons(tlv_type);
- tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size));
- if (tlv_data_size && tlv_data)
- memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size);
- return 1;
-}
-
-struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string)
-{
- struct sk_buff *buf;
- int string_len = strlen(string) + 1;
-
- buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
- if (buf)
- tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
- return buf;
-}
-
-struct sk_buff *tipc_cfg_do_cmd(struct net *net, u32 orig_node, u16 cmd,
- const void *request_area, int request_space,
- int reply_headroom)
-{
- struct sk_buff *rep_tlv_buf;
-
- rtnl_lock();
-
- /* Save request and reply details in a well-known location */
- req_tlv_area = request_area;
- req_tlv_space = request_space;
- rep_headroom = reply_headroom;
-
- /* Check command authorization */
- if (likely(in_own_node(net, orig_node))) {
- /* command is permitted */
- } else {
- rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
- " (cannot be done remotely)");
- goto exit;
- }
-
- /* Call appropriate processing routine */
- switch (cmd) {
- case TIPC_CMD_NOOP:
- rep_tlv_buf = tipc_cfg_reply_none();
- break;
- case TIPC_CMD_NOT_NET_ADMIN:
- rep_tlv_buf =
- tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
- break;
- case TIPC_CMD_SET_MAX_ZONES:
- case TIPC_CMD_GET_MAX_ZONES:
- case TIPC_CMD_SET_MAX_SLAVES:
- case TIPC_CMD_GET_MAX_SLAVES:
- case TIPC_CMD_SET_MAX_CLUSTERS:
- case TIPC_CMD_GET_MAX_CLUSTERS:
- case TIPC_CMD_SET_MAX_NODES:
- case TIPC_CMD_GET_MAX_NODES:
- case TIPC_CMD_SET_MAX_SUBSCR:
- case TIPC_CMD_GET_MAX_SUBSCR:
- case TIPC_CMD_SET_MAX_PUBL:
- case TIPC_CMD_GET_MAX_PUBL:
- case TIPC_CMD_SET_LOG_SIZE:
- case TIPC_CMD_SET_REMOTE_MNG:
- case TIPC_CMD_GET_REMOTE_MNG:
- case TIPC_CMD_DUMP_LOG:
- case TIPC_CMD_SET_MAX_PORTS:
- case TIPC_CMD_GET_MAX_PORTS:
- rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
- " (obsolete command)");
- break;
- default:
- rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
- " (unknown command)");
- break;
- }
-
- WARN_ON(rep_tlv_buf->len > TLV_SPACE(ULTRA_STRING_MAX_LEN));
-
- /* Append an error message if we cannot return all requested data */
- if (rep_tlv_buf->len == TLV_SPACE(ULTRA_STRING_MAX_LEN)) {
- if (*(rep_tlv_buf->data + ULTRA_STRING_MAX_LEN) != '\0')
- sprintf(rep_tlv_buf->data + rep_tlv_buf->len -
- sizeof(REPLY_TRUNCATED) - 1, REPLY_TRUNCATED);
- }
-
- /* Return reply buffer */
-exit:
- rtnl_unlock();
- return rep_tlv_buf;
-}