[deliverable/linux.git] / net / tipc / config.c

/*
 * 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 "port.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;
}

static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
{
	struct sk_buff *buf;
	__be32 value_net;

	buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
	if (buf) {
		value_net = htonl(value);
		tipc_cfg_append_tlv(buf, tlv_type, &value_net,
				    sizeof(value_net));
	}
	return buf;
}

static struct sk_buff *tipc_cfg_reply_unsigned(u32 value)
{
	return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value);
}

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;
}

static struct sk_buff *tipc_show_stats(void)
{
	struct sk_buff *buf;
	struct tlv_desc *rep_tlv;
	char *pb;
	int pb_len;
	int str_len;
	u32 value;

	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);

	value = ntohl(*(u32 *)TLV_DATA(req_tlv_area));
	if (value != 0)
		return tipc_cfg_reply_error_string("unsupported argument");

	buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN));
	if (buf == NULL)
		return NULL;

	rep_tlv = (struct tlv_desc *)buf->data;
	pb = TLV_DATA(rep_tlv);
	pb_len = ULTRA_STRING_MAX_LEN;

	str_len = tipc_snprintf(pb, pb_len, "TIPC version " TIPC_MOD_VER "\n");
	str_len += 1;	/* for "\0" */
	skb_put(buf, TLV_SPACE(str_len));
	TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);

	return buf;
}

static struct sk_buff *cfg_enable_bearer(void)
{
	struct tipc_bearer_config *args;

	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);

	args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
	if (tipc_enable_bearer(args->name,
			       ntohl(args->disc_domain),
			       ntohl(args->priority)))
		return tipc_cfg_reply_error_string("unable to enable bearer");

	return tipc_cfg_reply_none();
}

static struct sk_buff *cfg_disable_bearer(void)
{
	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);

	if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
		return tipc_cfg_reply_error_string("unable to disable bearer");

	return tipc_cfg_reply_none();
}

static struct sk_buff *cfg_set_own_addr(void)
{
	u32 addr;

	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);

	addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
	if (addr == tipc_own_addr)
		return tipc_cfg_reply_none();
	if (!tipc_addr_node_valid(addr))
		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
						   " (node address)");
	if (tipc_own_addr)
		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
						   " (cannot change node address once assigned)");
	tipc_net_start(addr);
	return tipc_cfg_reply_none();
}

static struct sk_buff *cfg_set_max_ports(void)
{
	u32 value;

	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
	value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
	if (value == tipc_max_ports)
		return tipc_cfg_reply_none();
	if (value < 127 || value > 65535)
		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
						   " (max ports must be 127-65535)");
	return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
		" (cannot change max ports while TIPC is active)");
}

static struct sk_buff *cfg_set_netid(void)
{
	u32 value;

	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
		return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
	value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
	if (value == tipc_net_id)
		return tipc_cfg_reply_none();
	if (value < 1 || value > 9999)
		return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
						   " (network id must be 1-9999)");
	if (tipc_own_addr)
		return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
			" (cannot change network id once TIPC has joined a network)");
	tipc_net_id = value;
	return tipc_cfg_reply_none();
}

struct sk_buff *tipc_cfg_do_cmd(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(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_GET_NODES:
		rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space);
		break;
	case TIPC_CMD_GET_LINKS:
		rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space);
		break;
	case TIPC_CMD_SHOW_LINK_STATS:
		rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space);
		break;
	case TIPC_CMD_RESET_LINK_STATS:
		rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space);
		break;
	case TIPC_CMD_SHOW_NAME_TABLE:
		rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space);
		break;
	case TIPC_CMD_GET_BEARER_NAMES:
		rep_tlv_buf = tipc_bearer_get_names();
		break;
	case TIPC_CMD_GET_MEDIA_NAMES:
		rep_tlv_buf = tipc_media_get_names();
		break;
	case TIPC_CMD_SHOW_PORTS:
		rep_tlv_buf = tipc_port_get_ports();
		break;
	case TIPC_CMD_SHOW_STATS:
		rep_tlv_buf = tipc_show_stats();
		break;
	case TIPC_CMD_SET_LINK_TOL:
	case TIPC_CMD_SET_LINK_PRI:
	case TIPC_CMD_SET_LINK_WINDOW:
		rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd);
		break;
	case TIPC_CMD_ENABLE_BEARER:
		rep_tlv_buf = cfg_enable_bearer();
		break;
	case TIPC_CMD_DISABLE_BEARER:
		rep_tlv_buf = cfg_disable_bearer();
		break;
	case TIPC_CMD_SET_NODE_ADDR:
		rep_tlv_buf = cfg_set_own_addr();
		break;
	case TIPC_CMD_SET_MAX_PORTS:
		rep_tlv_buf = cfg_set_max_ports();
		break;
	case TIPC_CMD_SET_NETID:
		rep_tlv_buf = cfg_set_netid();
		break;
	case TIPC_CMD_GET_MAX_PORTS:
		rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports);
		break;
	case TIPC_CMD_GET_NETID:
		rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id);
		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:
		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;
}
Commit	Line	Data
b97bf3fd PL	1	/*
b97bf3fd PL	2	* net/tipc/config.c: TIPC configuration management code
c4307285	3	*
593a5f22	4	* Copyright (c) 2002-2006, Ericsson AB
7d0ab17b	5	* Copyright (c) 2004-2007, 2010-2013, Wind River Systems
b97bf3fd PL	6	* All rights reserved.
b97bf3fd PL	7	*
9ea1fd3c	8	* Redistribution and use in source and binary forms, with or without
b97bf3fd PL	9	* modification, are permitted provided that the following conditions are met:
b97bf3fd PL	10	*
9ea1fd3c PL	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. Neither the names of the copyright holders nor the names of its
	17	* contributors may be used to endorse or promote products derived from
	18	* this software without specific prior written permission.
b97bf3fd	19	*
9ea1fd3c PL	20	* Alternatively, this software may be distributed under the terms of the
	21	* GNU General Public License ("GPL") version 2 as published by the Free
	22	* Software Foundation.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	25	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	28	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	29	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	30	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	31	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	32	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	33	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
b97bf3fd PL	34	* POSSIBILITY OF SUCH DAMAGE.
	35	*/
	36
	37	#include "core.h"
b97bf3fd	38	#include "port.h"
b97bf3fd	39	#include "name_table.h"
b97bf3fd	40	#include "config.h"
7d0ab17b	41	#include "server.h"
b97bf3fd	42
dc1aed37 EH	43	#define REPLY_TRUNCATED "<truncated>\n"
dc1aed37 EH	44
b97bf3fd PL	45	static const void req_tlv_area; / request message TLV area */
	46	static int req_tlv_space; /* request message TLV area size */
	47	static int rep_headroom; /* reply message headroom to use */
	48
4323add6	49	struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
b97bf3fd PL	50	{
	51	struct sk_buff *buf;
	52
	53	buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
	54	if (buf)
	55	skb_reserve(buf, rep_headroom);
	56	return buf;
	57	}
	58
c4307285	59	int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
4323add6	60	void *tlv_data, int tlv_data_size)
b97bf3fd	61	{
27a884dc	62	struct tlv_desc tlv = (struct tlv_desc )skb_tail_pointer(buf);
b97bf3fd PL	63	int new_tlv_space = TLV_SPACE(tlv_data_size);
b97bf3fd PL	64
b29f1428	65	if (skb_tailroom(buf) < new_tlv_space)
b97bf3fd	66	return 0;
b97bf3fd PL	67	skb_put(buf, new_tlv_space);
	68	tlv->tlv_type = htons(tlv_type);
	69	tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size));
	70	if (tlv_data_size && tlv_data)
	71	memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size);
	72	return 1;
	73	}
	74
31e3c3f6	75	static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
b97bf3fd PL	76	{
b97bf3fd PL	77	struct sk_buff *buf;
3e6c8cd5	78	__be32 value_net;
b97bf3fd	79
4323add6	80	buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
b97bf3fd PL	81	if (buf) {
b97bf3fd PL	82	value_net = htonl(value);
c4307285	83	tipc_cfg_append_tlv(buf, tlv_type, &value_net,
4323add6	84	sizeof(value_net));
b97bf3fd PL	85	}
	86	return buf;
	87	}
	88
31e3c3f6	89	static struct sk_buff *tipc_cfg_reply_unsigned(u32 value)
	90	{
	91	return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value);
	92	}
	93
4323add6	94	struct sk_buff tipc_cfg_reply_string_type(u16 tlv_type, char string)
b97bf3fd PL	95	{
	96	struct sk_buff *buf;
	97	int string_len = strlen(string) + 1;
	98
4323add6	99	buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
b97bf3fd	100	if (buf)
4323add6	101	tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
b97bf3fd PL	102	return buf;
	103	}
	104
107e7be6 AS	105	static struct sk_buff *tipc_show_stats(void)
	106	{
	107	struct sk_buff *buf;
	108	struct tlv_desc *rep_tlv;
dc1aed37 EH	109	char *pb;
dc1aed37 EH	110	int pb_len;
107e7be6 AS	111	int str_len;
	112	u32 value;
	113
	114	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
	115	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
	116
	117	value = ntohl((u32 )TLV_DATA(req_tlv_area));
	118	if (value != 0)
	119	return tipc_cfg_reply_error_string("unsupported argument");
	120
dc1aed37	121	buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN));
107e7be6 AS	122	if (buf == NULL)
	123	return NULL;
	124
	125	rep_tlv = (struct tlv_desc *)buf->data;
dc1aed37 EH	126	pb = TLV_DATA(rep_tlv);
dc1aed37 EH	127	pb_len = ULTRA_STRING_MAX_LEN;
107e7be6	128
dc1aed37 EH	129	str_len = tipc_snprintf(pb, pb_len, "TIPC version " TIPC_MOD_VER "\n");
dc1aed37 EH	130	str_len += 1; /* for "\0" */
107e7be6 AS	131	skb_put(buf, TLV_SPACE(str_len));
	132	TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
	133
	134	return buf;
	135	}
	136
b97bf3fd PL	137	static struct sk_buff *cfg_enable_bearer(void)
	138	{
	139	struct tipc_bearer_config *args;
	140
	141	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
4323add6	142	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
b97bf3fd PL	143
	144	args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
	145	if (tipc_enable_bearer(args->name,
50d3e639	146	ntohl(args->disc_domain),
b97bf3fd	147	ntohl(args->priority)))
4323add6	148	return tipc_cfg_reply_error_string("unable to enable bearer");
b97bf3fd	149
4323add6	150	return tipc_cfg_reply_none();
b97bf3fd PL	151	}
	152
	153	static struct sk_buff *cfg_disable_bearer(void)
	154	{
	155	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
4323add6	156	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
b97bf3fd PL	157
b97bf3fd PL	158	if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
4323add6	159	return tipc_cfg_reply_error_string("unable to disable bearer");
b97bf3fd	160
4323add6	161	return tipc_cfg_reply_none();
b97bf3fd PL	162	}
	163
	164	static struct sk_buff *cfg_set_own_addr(void)
	165	{
	166	u32 addr;
	167
	168	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
4323add6	169	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
b97bf3fd	170
3e6c8cd5	171	addr = ntohl((__be32 )TLV_DATA(req_tlv_area));
b97bf3fd	172	if (addr == tipc_own_addr)
4323add6 PL	173	return tipc_cfg_reply_none();
	174	if (!tipc_addr_node_valid(addr))
	175	return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
	176	" (node address)");
b58343f9	177	if (tipc_own_addr)
4323add6 PL	178	return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
4323add6 PL	179	" (cannot change node address once assigned)");
970122fd	180	tipc_net_start(addr);
4323add6	181	return tipc_cfg_reply_none();
b97bf3fd PL	182	}
b97bf3fd PL	183
b97bf3fd PL	184	static struct sk_buff *cfg_set_max_ports(void)
b97bf3fd PL	185	{
b97bf3fd PL	186	u32 value;
	187
	188	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
4323add6	189	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
3e6c8cd5	190	value = ntohl((__be32 )TLV_DATA(req_tlv_area));
e100ae92 AS	191	if (value == tipc_max_ports)
e100ae92 AS	192	return tipc_cfg_reply_none();
732efba4	193	if (value < 127 \|\| value > 65535)
4323add6 PL	194	return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
4323add6 PL	195	" (max ports must be 127-65535)");
077a26f0 AS	196	return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
077a26f0 AS	197	" (cannot change max ports while TIPC is active)");
b97bf3fd PL	198	}
b97bf3fd PL	199
b97bf3fd PL	200	static struct sk_buff *cfg_set_netid(void)
	201	{
	202	u32 value;
	203
	204	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
4323add6	205	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
3e6c8cd5	206	value = ntohl((__be32 )TLV_DATA(req_tlv_area));
e100ae92 AS	207	if (value == tipc_net_id)
e100ae92 AS	208	return tipc_cfg_reply_none();
732efba4	209	if (value < 1 \|\| value > 9999)
4323add6 PL	210	return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
4323add6 PL	211	" (network id must be 1-9999)");
b58343f9	212	if (tipc_own_addr)
4323add6	213	return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
e100ae92 AS	214	" (cannot change network id once TIPC has joined a network)");
	215	tipc_net_id = value;
	216	return tipc_cfg_reply_none();
b97bf3fd PL	217	}
b97bf3fd PL	218
4323add6 PL	219	struct sk_buff tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void request_area,
4323add6 PL	220	int request_space, int reply_headroom)
b97bf3fd PL	221	{
	222	struct sk_buff *rep_tlv_buf;
	223
ef13a262	224	rtnl_lock();
b97bf3fd PL	225
b97bf3fd PL	226	/* Save request and reply details in a well-known location */
b97bf3fd PL	227	req_tlv_area = request_area;
	228	req_tlv_space = request_space;
	229	rep_headroom = reply_headroom;
	230
	231	/* Check command authorization */
9d52ce4b	232	if (likely(in_own_node(orig_node))) {
b97bf3fd	233	/* command is permitted */
5902385a	234	} else {
4323add6 PL	235	rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
4323add6 PL	236	" (cannot be done remotely)");
b97bf3fd	237	goto exit;
b97bf3fd PL	238	}
	239
	240	/* Call appropriate processing routine */
b97bf3fd PL	241	switch (cmd) {
b97bf3fd PL	242	case TIPC_CMD_NOOP:
4323add6	243	rep_tlv_buf = tipc_cfg_reply_none();
b97bf3fd PL	244	break;
b97bf3fd PL	245	case TIPC_CMD_GET_NODES:
4323add6	246	rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space);
b97bf3fd PL	247	break;
b97bf3fd PL	248	case TIPC_CMD_GET_LINKS:
4323add6	249	rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space);
b97bf3fd PL	250	break;
b97bf3fd PL	251	case TIPC_CMD_SHOW_LINK_STATS:
4323add6	252	rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space);
b97bf3fd PL	253	break;
b97bf3fd PL	254	case TIPC_CMD_RESET_LINK_STATS:
4323add6	255	rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space);
b97bf3fd PL	256	break;
b97bf3fd PL	257	case TIPC_CMD_SHOW_NAME_TABLE:
4323add6	258	rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space);
b97bf3fd PL	259	break;
b97bf3fd PL	260	case TIPC_CMD_GET_BEARER_NAMES:
4323add6	261	rep_tlv_buf = tipc_bearer_get_names();
b97bf3fd PL	262	break;
b97bf3fd PL	263	case TIPC_CMD_GET_MEDIA_NAMES:
4323add6	264	rep_tlv_buf = tipc_media_get_names();
b97bf3fd PL	265	break;
b97bf3fd PL	266	case TIPC_CMD_SHOW_PORTS:
4323add6	267	rep_tlv_buf = tipc_port_get_ports();
b97bf3fd	268	break;
107e7be6 AS	269	case TIPC_CMD_SHOW_STATS:
	270	rep_tlv_buf = tipc_show_stats();
	271	break;
b97bf3fd PL	272	case TIPC_CMD_SET_LINK_TOL:
	273	case TIPC_CMD_SET_LINK_PRI:
	274	case TIPC_CMD_SET_LINK_WINDOW:
4323add6	275	rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd);
b97bf3fd PL	276	break;
	277	case TIPC_CMD_ENABLE_BEARER:
	278	rep_tlv_buf = cfg_enable_bearer();
	279	break;
	280	case TIPC_CMD_DISABLE_BEARER:
	281	rep_tlv_buf = cfg_disable_bearer();
	282	break;
	283	case TIPC_CMD_SET_NODE_ADDR:
	284	rep_tlv_buf = cfg_set_own_addr();
	285	break;
b97bf3fd PL	286	case TIPC_CMD_SET_MAX_PORTS:
	287	rep_tlv_buf = cfg_set_max_ports();
	288	break;
b97bf3fd PL	289	case TIPC_CMD_SET_NETID:
	290	rep_tlv_buf = cfg_set_netid();
	291	break;
b97bf3fd	292	case TIPC_CMD_GET_MAX_PORTS:
4323add6	293	rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports);
b97bf3fd	294	break;
b97bf3fd	295	case TIPC_CMD_GET_NETID:
4323add6	296	rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id);
b97bf3fd	297	break;
59f0c452 AS	298	case TIPC_CMD_NOT_NET_ADMIN:
	299	rep_tlv_buf =
	300	tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
	301	break;
51f98a8d AS	302	case TIPC_CMD_SET_MAX_ZONES:
51f98a8d AS	303	case TIPC_CMD_GET_MAX_ZONES:
08c80e9a AS	304	case TIPC_CMD_SET_MAX_SLAVES:
08c80e9a AS	305	case TIPC_CMD_GET_MAX_SLAVES:
8f92df6a AS	306	case TIPC_CMD_SET_MAX_CLUSTERS:
8f92df6a AS	307	case TIPC_CMD_GET_MAX_CLUSTERS:
f831c963 AS	308	case TIPC_CMD_SET_MAX_NODES:
f831c963 AS	309	case TIPC_CMD_GET_MAX_NODES:
34f256cc YX	310	case TIPC_CMD_SET_MAX_SUBSCR:
34f256cc YX	311	case TIPC_CMD_GET_MAX_SUBSCR:
e6a04b1d YX	312	case TIPC_CMD_SET_MAX_PUBL:
e6a04b1d YX	313	case TIPC_CMD_GET_MAX_PUBL:
869dd466	314	case TIPC_CMD_SET_LOG_SIZE:
5902385a YX	315	case TIPC_CMD_SET_REMOTE_MNG:
5902385a YX	316	case TIPC_CMD_GET_REMOTE_MNG:
869dd466	317	case TIPC_CMD_DUMP_LOG:
51f98a8d AS	318	rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
	319	" (obsolete command)");
	320	break;
b97bf3fd	321	default:
53cfd1e1 AS	322	rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
53cfd1e1 AS	323	" (unknown command)");
b97bf3fd PL	324	break;
	325	}
	326
dc1aed37 EH	327	WARN_ON(rep_tlv_buf->len > TLV_SPACE(ULTRA_STRING_MAX_LEN));
	328
	329	/* Append an error message if we cannot return all requested data */
	330	if (rep_tlv_buf->len == TLV_SPACE(ULTRA_STRING_MAX_LEN)) {
	331	if (*(rep_tlv_buf->data + ULTRA_STRING_MAX_LEN) != '\0')
	332	sprintf(rep_tlv_buf->data + rep_tlv_buf->len -
	333	sizeof(REPLY_TRUNCATED) - 1, REPLY_TRUNCATED);
	334	}
	335
b97bf3fd PL	336	/* Return reply buffer */
b97bf3fd PL	337	exit:
ef13a262	338	rtnl_unlock();
b97bf3fd PL	339	return rep_tlv_buf;
b97bf3fd PL	340	}