Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 | /*
* 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;
}
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)");
if (!tipc_net_start(addr))
return tipc_cfg_reply_none();
return tipc_cfg_reply_error_string("cannot change to network mode");
}
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_sk_socks_show();
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;
}
|