Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
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. |
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: |
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" | |
5a9ee0be | 38 | #include "socket.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" |
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); |
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 | { |
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) { |
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; |
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); |
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"); |
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 | ||
c93d3baa | 137 | static struct sk_buff *cfg_set_own_addr(struct net *net) |
b97bf3fd | 138 | { |
34747539 | 139 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
b97bf3fd PL |
140 | u32 addr; |
141 | ||
142 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR)) | |
4323add6 | 143 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 144 | |
3e6c8cd5 | 145 | addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
34747539 | 146 | if (addr == tn->own_addr) |
4323add6 PL |
147 | return tipc_cfg_reply_none(); |
148 | if (!tipc_addr_node_valid(addr)) | |
149 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
150 | " (node address)"); | |
34747539 | 151 | if (tn->own_addr) |
4323add6 PL |
152 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
153 | " (cannot change node address once assigned)"); | |
c93d3baa | 154 | if (!tipc_net_start(net, addr)) |
eb8b00f5 YX |
155 | return tipc_cfg_reply_none(); |
156 | ||
157 | return tipc_cfg_reply_error_string("cannot change to network mode"); | |
b97bf3fd PL |
158 | } |
159 | ||
c93d3baa | 160 | static struct sk_buff *cfg_set_netid(struct net *net) |
b97bf3fd | 161 | { |
c93d3baa | 162 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
b97bf3fd PL |
163 | u32 value; |
164 | ||
165 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 166 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 167 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
c93d3baa | 168 | if (value == tn->net_id) |
e100ae92 | 169 | return tipc_cfg_reply_none(); |
732efba4 | 170 | if (value < 1 || value > 9999) |
4323add6 PL |
171 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
172 | " (network id must be 1-9999)"); | |
34747539 | 173 | if (tn->own_addr) |
4323add6 | 174 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
e100ae92 | 175 | " (cannot change network id once TIPC has joined a network)"); |
c93d3baa | 176 | tn->net_id = value; |
e100ae92 | 177 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
178 | } |
179 | ||
c93d3baa YX |
180 | struct sk_buff *tipc_cfg_do_cmd(struct net *net, u32 orig_node, u16 cmd, |
181 | const void *request_area, int request_space, | |
182 | int reply_headroom) | |
b97bf3fd PL |
183 | { |
184 | struct sk_buff *rep_tlv_buf; | |
c93d3baa | 185 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
b97bf3fd | 186 | |
ef13a262 | 187 | rtnl_lock(); |
b97bf3fd PL |
188 | |
189 | /* Save request and reply details in a well-known location */ | |
b97bf3fd PL |
190 | req_tlv_area = request_area; |
191 | req_tlv_space = request_space; | |
192 | rep_headroom = reply_headroom; | |
193 | ||
194 | /* Check command authorization */ | |
34747539 | 195 | if (likely(in_own_node(net, orig_node))) { |
b97bf3fd | 196 | /* command is permitted */ |
5902385a | 197 | } else { |
4323add6 PL |
198 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
199 | " (cannot be done remotely)"); | |
b97bf3fd | 200 | goto exit; |
b97bf3fd PL |
201 | } |
202 | ||
203 | /* Call appropriate processing routine */ | |
b97bf3fd PL |
204 | switch (cmd) { |
205 | case TIPC_CMD_NOOP: | |
4323add6 | 206 | rep_tlv_buf = tipc_cfg_reply_none(); |
b97bf3fd PL |
207 | break; |
208 | case TIPC_CMD_GET_NODES: | |
f2f9800d YX |
209 | rep_tlv_buf = tipc_node_get_nodes(net, req_tlv_area, |
210 | req_tlv_space); | |
b97bf3fd | 211 | break; |
b97bf3fd | 212 | case TIPC_CMD_GET_MEDIA_NAMES: |
4323add6 | 213 | rep_tlv_buf = tipc_media_get_names(); |
b97bf3fd PL |
214 | break; |
215 | case TIPC_CMD_SHOW_PORTS: | |
e05b31f4 | 216 | rep_tlv_buf = tipc_sk_socks_show(net); |
b97bf3fd | 217 | break; |
107e7be6 AS |
218 | case TIPC_CMD_SHOW_STATS: |
219 | rep_tlv_buf = tipc_show_stats(); | |
220 | break; | |
b97bf3fd | 221 | case TIPC_CMD_SET_NODE_ADDR: |
c93d3baa | 222 | rep_tlv_buf = cfg_set_own_addr(net); |
b97bf3fd | 223 | break; |
b97bf3fd | 224 | case TIPC_CMD_SET_NETID: |
c93d3baa | 225 | rep_tlv_buf = cfg_set_netid(net); |
b97bf3fd | 226 | break; |
b97bf3fd | 227 | case TIPC_CMD_GET_NETID: |
c93d3baa | 228 | rep_tlv_buf = tipc_cfg_reply_unsigned(tn->net_id); |
b97bf3fd | 229 | break; |
59f0c452 AS |
230 | case TIPC_CMD_NOT_NET_ADMIN: |
231 | rep_tlv_buf = | |
232 | tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN); | |
233 | break; | |
51f98a8d AS |
234 | case TIPC_CMD_SET_MAX_ZONES: |
235 | case TIPC_CMD_GET_MAX_ZONES: | |
08c80e9a AS |
236 | case TIPC_CMD_SET_MAX_SLAVES: |
237 | case TIPC_CMD_GET_MAX_SLAVES: | |
8f92df6a AS |
238 | case TIPC_CMD_SET_MAX_CLUSTERS: |
239 | case TIPC_CMD_GET_MAX_CLUSTERS: | |
f831c963 AS |
240 | case TIPC_CMD_SET_MAX_NODES: |
241 | case TIPC_CMD_GET_MAX_NODES: | |
34f256cc YX |
242 | case TIPC_CMD_SET_MAX_SUBSCR: |
243 | case TIPC_CMD_GET_MAX_SUBSCR: | |
e6a04b1d YX |
244 | case TIPC_CMD_SET_MAX_PUBL: |
245 | case TIPC_CMD_GET_MAX_PUBL: | |
869dd466 | 246 | case TIPC_CMD_SET_LOG_SIZE: |
5902385a YX |
247 | case TIPC_CMD_SET_REMOTE_MNG: |
248 | case TIPC_CMD_GET_REMOTE_MNG: | |
869dd466 | 249 | case TIPC_CMD_DUMP_LOG: |
07f6c4bc YX |
250 | case TIPC_CMD_SET_MAX_PORTS: |
251 | case TIPC_CMD_GET_MAX_PORTS: | |
51f98a8d AS |
252 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
253 | " (obsolete command)"); | |
254 | break; | |
b97bf3fd | 255 | default: |
53cfd1e1 AS |
256 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
257 | " (unknown command)"); | |
b97bf3fd PL |
258 | break; |
259 | } | |
260 | ||
dc1aed37 EH |
261 | WARN_ON(rep_tlv_buf->len > TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
262 | ||
263 | /* Append an error message if we cannot return all requested data */ | |
264 | if (rep_tlv_buf->len == TLV_SPACE(ULTRA_STRING_MAX_LEN)) { | |
265 | if (*(rep_tlv_buf->data + ULTRA_STRING_MAX_LEN) != '\0') | |
266 | sprintf(rep_tlv_buf->data + rep_tlv_buf->len - | |
267 | sizeof(REPLY_TRUNCATED) - 1, REPLY_TRUNCATED); | |
268 | } | |
269 | ||
b97bf3fd PL |
270 | /* Return reply buffer */ |
271 | exit: | |
ef13a262 | 272 | rtnl_unlock(); |
b97bf3fd PL |
273 | return rep_tlv_buf; |
274 | } |