[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 DEFINE_MUTEX(config_mutex);

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;

	mutex_lock(&config_mutex);

	/* 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:
	mutex_unlock(&config_mutex);
	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
28e52972	45	static DEFINE_MUTEX(config_mutex);
b97bf3fd PL	46
	47	static const void req_tlv_area; / request message TLV area */
	48	static int req_tlv_space; /* request message TLV area size */
	49	static int rep_headroom; /* reply message headroom to use */
	50
4323add6	51	struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
b97bf3fd PL	52	{
	53	struct sk_buff *buf;
	54
	55	buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
	56	if (buf)
	57	skb_reserve(buf, rep_headroom);
	58	return buf;
	59	}
	60
c4307285	61	int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
4323add6	62	void *tlv_data, int tlv_data_size)
b97bf3fd	63	{
27a884dc	64	struct tlv_desc tlv = (struct tlv_desc )skb_tail_pointer(buf);
b97bf3fd PL	65	int new_tlv_space = TLV_SPACE(tlv_data_size);
b97bf3fd PL	66
b29f1428	67	if (skb_tailroom(buf) < new_tlv_space)
b97bf3fd	68	return 0;
b97bf3fd PL	69	skb_put(buf, new_tlv_space);
	70	tlv->tlv_type = htons(tlv_type);
	71	tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size));
	72	if (tlv_data_size && tlv_data)
	73	memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size);
	74	return 1;
	75	}
	76
31e3c3f6	77	static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
b97bf3fd PL	78	{
b97bf3fd PL	79	struct sk_buff *buf;
3e6c8cd5	80	__be32 value_net;
b97bf3fd	81
4323add6	82	buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
b97bf3fd PL	83	if (buf) {
b97bf3fd PL	84	value_net = htonl(value);
c4307285	85	tipc_cfg_append_tlv(buf, tlv_type, &value_net,
4323add6	86	sizeof(value_net));
b97bf3fd PL	87	}
	88	return buf;
	89	}
	90
31e3c3f6	91	static struct sk_buff *tipc_cfg_reply_unsigned(u32 value)
	92	{
	93	return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value);
	94	}
	95
4323add6	96	struct sk_buff tipc_cfg_reply_string_type(u16 tlv_type, char string)
b97bf3fd PL	97	{
	98	struct sk_buff *buf;
	99	int string_len = strlen(string) + 1;
	100
4323add6	101	buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
b97bf3fd	102	if (buf)
4323add6	103	tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
b97bf3fd PL	104	return buf;
	105	}
	106
107e7be6 AS	107	static struct sk_buff *tipc_show_stats(void)
	108	{
	109	struct sk_buff *buf;
	110	struct tlv_desc *rep_tlv;
dc1aed37 EH	111	char *pb;
dc1aed37 EH	112	int pb_len;
107e7be6 AS	113	int str_len;
	114	u32 value;
	115
	116	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
	117	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
	118
	119	value = ntohl((u32 )TLV_DATA(req_tlv_area));
	120	if (value != 0)
	121	return tipc_cfg_reply_error_string("unsupported argument");
	122
dc1aed37	123	buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN));
107e7be6 AS	124	if (buf == NULL)
	125	return NULL;
	126
	127	rep_tlv = (struct tlv_desc *)buf->data;
dc1aed37 EH	128	pb = TLV_DATA(rep_tlv);
dc1aed37 EH	129	pb_len = ULTRA_STRING_MAX_LEN;
107e7be6	130
dc1aed37 EH	131	str_len = tipc_snprintf(pb, pb_len, "TIPC version " TIPC_MOD_VER "\n");
dc1aed37 EH	132	str_len += 1; /* for "\0" */
107e7be6 AS	133	skb_put(buf, TLV_SPACE(str_len));
	134	TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
	135
	136	return buf;
	137	}
	138
b97bf3fd PL	139	static struct sk_buff *cfg_enable_bearer(void)
	140	{
	141	struct tipc_bearer_config *args;
	142
	143	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
4323add6	144	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
b97bf3fd PL	145
	146	args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
	147	if (tipc_enable_bearer(args->name,
50d3e639	148	ntohl(args->disc_domain),
b97bf3fd	149	ntohl(args->priority)))
4323add6	150	return tipc_cfg_reply_error_string("unable to enable bearer");
b97bf3fd	151
4323add6	152	return tipc_cfg_reply_none();
b97bf3fd PL	153	}
	154
	155	static struct sk_buff *cfg_disable_bearer(void)
	156	{
	157	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
4323add6	158	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
b97bf3fd PL	159
b97bf3fd PL	160	if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
4323add6	161	return tipc_cfg_reply_error_string("unable to disable bearer");
b97bf3fd	162
4323add6	163	return tipc_cfg_reply_none();
b97bf3fd PL	164	}
	165
	166	static struct sk_buff *cfg_set_own_addr(void)
	167	{
	168	u32 addr;
	169
	170	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
4323add6	171	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
b97bf3fd	172
3e6c8cd5	173	addr = ntohl((__be32 )TLV_DATA(req_tlv_area));
b97bf3fd	174	if (addr == tipc_own_addr)
4323add6 PL	175	return tipc_cfg_reply_none();
	176	if (!tipc_addr_node_valid(addr))
	177	return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
	178	" (node address)");
b58343f9	179	if (tipc_own_addr)
4323add6 PL	180	return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
4323add6 PL	181	" (cannot change node address once assigned)");
970122fd	182	tipc_net_start(addr);
4323add6	183	return tipc_cfg_reply_none();
b97bf3fd PL	184	}
b97bf3fd PL	185
b97bf3fd PL	186	static struct sk_buff *cfg_set_max_ports(void)
b97bf3fd PL	187	{
b97bf3fd PL	188	u32 value;
	189
	190	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
4323add6	191	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
3e6c8cd5	192	value = ntohl((__be32 )TLV_DATA(req_tlv_area));
e100ae92 AS	193	if (value == tipc_max_ports)
e100ae92 AS	194	return tipc_cfg_reply_none();
732efba4	195	if (value < 127 \|\| value > 65535)
4323add6 PL	196	return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
4323add6 PL	197	" (max ports must be 127-65535)");
077a26f0 AS	198	return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
077a26f0 AS	199	" (cannot change max ports while TIPC is active)");
b97bf3fd PL	200	}
b97bf3fd PL	201
b97bf3fd PL	202	static struct sk_buff *cfg_set_netid(void)
	203	{
	204	u32 value;
	205
	206	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
4323add6	207	return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
3e6c8cd5	208	value = ntohl((__be32 )TLV_DATA(req_tlv_area));
e100ae92 AS	209	if (value == tipc_net_id)
e100ae92 AS	210	return tipc_cfg_reply_none();
732efba4	211	if (value < 1 \|\| value > 9999)
4323add6 PL	212	return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
4323add6 PL	213	" (network id must be 1-9999)");
b58343f9	214	if (tipc_own_addr)
4323add6	215	return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
e100ae92 AS	216	" (cannot change network id once TIPC has joined a network)");
	217	tipc_net_id = value;
	218	return tipc_cfg_reply_none();
b97bf3fd PL	219	}
b97bf3fd PL	220
4323add6 PL	221	struct sk_buff tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void request_area,
4323add6 PL	222	int request_space, int reply_headroom)
b97bf3fd PL	223	{
	224	struct sk_buff *rep_tlv_buf;
	225
28e52972	226	mutex_lock(&config_mutex);
b97bf3fd PL	227
b97bf3fd PL	228	/* Save request and reply details in a well-known location */
b97bf3fd PL	229	req_tlv_area = request_area;
	230	req_tlv_space = request_space;
	231	rep_headroom = reply_headroom;
	232
	233	/* Check command authorization */
9d52ce4b	234	if (likely(in_own_node(orig_node))) {
b97bf3fd	235	/* command is permitted */
5902385a	236	} else {
4323add6 PL	237	rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
4323add6 PL	238	" (cannot be done remotely)");
b97bf3fd	239	goto exit;
b97bf3fd PL	240	}
	241
	242	/* Call appropriate processing routine */
b97bf3fd PL	243	switch (cmd) {
b97bf3fd PL	244	case TIPC_CMD_NOOP:
4323add6	245	rep_tlv_buf = tipc_cfg_reply_none();
b97bf3fd PL	246	break;
b97bf3fd PL	247	case TIPC_CMD_GET_NODES:
4323add6	248	rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space);
b97bf3fd PL	249	break;
b97bf3fd PL	250	case TIPC_CMD_GET_LINKS:
4323add6	251	rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space);
b97bf3fd PL	252	break;
b97bf3fd PL	253	case TIPC_CMD_SHOW_LINK_STATS:
4323add6	254	rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space);
b97bf3fd PL	255	break;
b97bf3fd PL	256	case TIPC_CMD_RESET_LINK_STATS:
4323add6	257	rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space);
b97bf3fd PL	258	break;
b97bf3fd PL	259	case TIPC_CMD_SHOW_NAME_TABLE:
4323add6	260	rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space);
b97bf3fd PL	261	break;
b97bf3fd PL	262	case TIPC_CMD_GET_BEARER_NAMES:
4323add6	263	rep_tlv_buf = tipc_bearer_get_names();
b97bf3fd PL	264	break;
b97bf3fd PL	265	case TIPC_CMD_GET_MEDIA_NAMES:
4323add6	266	rep_tlv_buf = tipc_media_get_names();
b97bf3fd PL	267	break;
b97bf3fd PL	268	case TIPC_CMD_SHOW_PORTS:
4323add6	269	rep_tlv_buf = tipc_port_get_ports();
b97bf3fd	270	break;
107e7be6 AS	271	case TIPC_CMD_SHOW_STATS:
	272	rep_tlv_buf = tipc_show_stats();
	273	break;
b97bf3fd PL	274	case TIPC_CMD_SET_LINK_TOL:
	275	case TIPC_CMD_SET_LINK_PRI:
	276	case TIPC_CMD_SET_LINK_WINDOW:
4323add6	277	rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd);
b97bf3fd PL	278	break;
	279	case TIPC_CMD_ENABLE_BEARER:
	280	rep_tlv_buf = cfg_enable_bearer();
	281	break;
	282	case TIPC_CMD_DISABLE_BEARER:
	283	rep_tlv_buf = cfg_disable_bearer();
	284	break;
	285	case TIPC_CMD_SET_NODE_ADDR:
	286	rep_tlv_buf = cfg_set_own_addr();
	287	break;
b97bf3fd PL	288	case TIPC_CMD_SET_MAX_PORTS:
	289	rep_tlv_buf = cfg_set_max_ports();
	290	break;
b97bf3fd PL	291	case TIPC_CMD_SET_NETID:
	292	rep_tlv_buf = cfg_set_netid();
	293	break;
b97bf3fd	294	case TIPC_CMD_GET_MAX_PORTS:
4323add6	295	rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports);
b97bf3fd	296	break;
b97bf3fd	297	case TIPC_CMD_GET_NETID:
4323add6	298	rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id);
b97bf3fd	299	break;
59f0c452 AS	300	case TIPC_CMD_NOT_NET_ADMIN:
	301	rep_tlv_buf =
	302	tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
	303	break;
51f98a8d AS	304	case TIPC_CMD_SET_MAX_ZONES:
51f98a8d AS	305	case TIPC_CMD_GET_MAX_ZONES:
08c80e9a AS	306	case TIPC_CMD_SET_MAX_SLAVES:
08c80e9a AS	307	case TIPC_CMD_GET_MAX_SLAVES:
8f92df6a AS	308	case TIPC_CMD_SET_MAX_CLUSTERS:
8f92df6a AS	309	case TIPC_CMD_GET_MAX_CLUSTERS:
f831c963 AS	310	case TIPC_CMD_SET_MAX_NODES:
f831c963 AS	311	case TIPC_CMD_GET_MAX_NODES:
34f256cc YX	312	case TIPC_CMD_SET_MAX_SUBSCR:
34f256cc YX	313	case TIPC_CMD_GET_MAX_SUBSCR:
e6a04b1d YX	314	case TIPC_CMD_SET_MAX_PUBL:
e6a04b1d YX	315	case TIPC_CMD_GET_MAX_PUBL:
869dd466	316	case TIPC_CMD_SET_LOG_SIZE:
5902385a YX	317	case TIPC_CMD_SET_REMOTE_MNG:
5902385a YX	318	case TIPC_CMD_GET_REMOTE_MNG:
869dd466	319	case TIPC_CMD_DUMP_LOG:
51f98a8d AS	320	rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
	321	" (obsolete command)");
	322	break;
b97bf3fd	323	default:
53cfd1e1 AS	324	rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
53cfd1e1 AS	325	" (unknown command)");
b97bf3fd PL	326	break;
	327	}
	328
dc1aed37 EH	329	WARN_ON(rep_tlv_buf->len > TLV_SPACE(ULTRA_STRING_MAX_LEN));
	330
	331	/* Append an error message if we cannot return all requested data */
	332	if (rep_tlv_buf->len == TLV_SPACE(ULTRA_STRING_MAX_LEN)) {
	333	if (*(rep_tlv_buf->data + ULTRA_STRING_MAX_LEN) != '\0')
	334	sprintf(rep_tlv_buf->data + rep_tlv_buf->len -
	335	sizeof(REPLY_TRUNCATED) - 1, REPLY_TRUNCATED);
	336	}
	337
b97bf3fd PL	338	/* Return reply buffer */
b97bf3fd PL	339	exit:
28e52972	340	mutex_unlock(&config_mutex);
b97bf3fd PL	341	return rep_tlv_buf;
b97bf3fd PL	342	}