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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Tom Gundersen <teg@jklm.no> | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <netinet/ether.h> | |
23 | #include <linux/if.h> | |
24 | ||
25 | #include "networkd.h" | |
26 | #include "libudev-private.h" | |
27 | #include "util.h" | |
28 | ||
29 | int link_new(Manager *manager, struct udev_device *device, Link **ret) { | |
30 | _cleanup_link_free_ Link *link = NULL; | |
8cd11a0f | 31 | const char *mac; |
602cc437 | 32 | struct ether_addr *mac_addr; |
f579559b TG |
33 | int r; |
34 | ||
35 | assert(device); | |
36 | assert(ret); | |
37 | ||
38 | link = new0(Link, 1); | |
39 | if (!link) | |
40 | return -ENOMEM; | |
41 | ||
0617ffab TG |
42 | link->ifindex = udev_device_get_ifindex(device); |
43 | if (link->ifindex <= 0) | |
f579559b TG |
44 | return -EINVAL; |
45 | ||
8cd11a0f TG |
46 | mac = udev_device_get_sysattr_value(device, "address"); |
47 | if (!mac) | |
48 | return -EINVAL; | |
49 | ||
602cc437 TG |
50 | mac_addr = ether_aton(mac); |
51 | if (!mac_addr) | |
52 | return -EINVAL; | |
53 | ||
54 | memcpy(&link->mac, mac_addr, sizeof(struct ether_addr)); | |
55 | ||
f579559b | 56 | link->manager = manager; |
f882c247 | 57 | link->state = _LINK_STATE_INVALID; |
f579559b | 58 | |
0617ffab | 59 | r = hashmap_put(manager->links, &link->ifindex, link); |
f579559b TG |
60 | if (r < 0) |
61 | return r; | |
62 | ||
63 | *ret = link; | |
64 | link = NULL; | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | void link_free(Link *link) { | |
70 | if (!link) | |
71 | return; | |
72 | ||
0617ffab | 73 | assert(link->manager); |
f579559b | 74 | |
0617ffab | 75 | hashmap_remove(link->manager->links, &link->ifindex); |
f579559b TG |
76 | |
77 | free(link); | |
78 | } | |
79 | ||
80 | int link_add(Manager *m, struct udev_device *device) { | |
81 | Link *link; | |
82 | Network *network; | |
83 | int r; | |
84 | uint64_t ifindex; | |
85 | ||
86 | assert(m); | |
87 | assert(device); | |
88 | ||
89 | ifindex = udev_device_get_ifindex(device); | |
90 | link = hashmap_get(m->links, &ifindex); | |
91 | if (link) | |
92 | return 0; | |
93 | ||
94 | r = link_new(m, device, &link); | |
95 | if (r < 0) { | |
96 | log_error("could not create link: %s", strerror(-r)); | |
97 | return r; | |
98 | } | |
99 | ||
100 | r = network_get(m, device, &network); | |
101 | if (r < 0) | |
102 | return r == -ENOENT ? 0 : r; | |
103 | ||
104 | r = network_apply(m, network, link); | |
105 | if (r < 0) | |
106 | return r; | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
f882c247 TG |
111 | static int link_enter_configured(Link *link) { |
112 | log_info("Link configured successfully."); | |
113 | ||
114 | link->state = LINK_STATE_CONFIGURED; | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | static int link_enter_failed(Link *link) { | |
120 | log_warning("Could not configure link."); | |
121 | ||
122 | link->state = LINK_STATE_FAILED; | |
123 | ||
124 | return 0; | |
125 | } | |
126 | ||
127 | static bool link_is_up(Link *link) { | |
128 | return link->flags & IFF_UP; | |
129 | } | |
130 | ||
131 | static int link_enter_routes_set(Link *link) { | |
0617ffab | 132 | log_info("Routes set for link %u", (unsigned)link->ifindex); |
f882c247 TG |
133 | |
134 | if (link_is_up(link)) | |
135 | return link_enter_configured(link); | |
136 | ||
137 | link->state = LINK_STATE_ROUTES_SET; | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
143 | Link *link = userdata; | |
144 | int r; | |
145 | ||
146 | assert(link->rtnl_messages > 0); | |
147 | assert(link->state == LINK_STATE_SET_ROUTES || link->state == LINK_STATE_FAILED); | |
148 | ||
149 | link->rtnl_messages --; | |
150 | ||
151 | if (link->state == LINK_STATE_FAILED) | |
152 | return 1; | |
153 | ||
154 | r = sd_rtnl_message_get_errno(m); | |
155 | if (r < 0 && r != -EEXIST) { | |
0617ffab TG |
156 | log_warning("Could not set route on interface %u: %s", |
157 | (unsigned)link->ifindex, strerror(-r)); | |
f882c247 TG |
158 | return link_enter_failed(link); |
159 | } | |
160 | ||
161 | if (link->rtnl_messages == 0) | |
162 | return link_enter_routes_set(link); | |
163 | ||
164 | return 1; | |
165 | } | |
166 | ||
167 | static int link_enter_set_routes(Link *link) { | |
168 | Route *route; | |
169 | int r; | |
170 | ||
171 | assert(link); | |
172 | assert(link->network); | |
173 | assert(link->rtnl_messages == 0); | |
174 | assert(link->state == LINK_STATE_ADDRESSES_SET); | |
175 | ||
176 | link->state = LINK_STATE_SET_ROUTES; | |
177 | ||
178 | if (!link->network->routes) | |
179 | return link_enter_routes_set(link); | |
180 | ||
181 | LIST_FOREACH(routes, route, link->network->routes) { | |
182 | r = route_configure(route, link, &route_handler); | |
183 | if (r < 0) | |
184 | link_enter_failed(link); | |
185 | } | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static int link_enter_addresses_set(Link *link) { | |
0617ffab | 191 | log_info("Addresses set for link %u", (unsigned)link->ifindex); |
f882c247 TG |
192 | |
193 | link->state = LINK_STATE_ADDRESSES_SET; | |
194 | ||
195 | return link_enter_set_routes(link); | |
196 | } | |
197 | ||
198 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
199 | Link *link = userdata; | |
200 | int r; | |
201 | ||
202 | assert(link->rtnl_messages > 0); | |
203 | assert(link->state == LINK_STATE_SET_ADDRESSES || link->state == LINK_STATE_FAILED); | |
204 | ||
205 | link->rtnl_messages --; | |
206 | ||
207 | if (link->state == LINK_STATE_FAILED) | |
208 | return 1; | |
209 | ||
210 | r = sd_rtnl_message_get_errno(m); | |
211 | if (r < 0 && r != -EEXIST) { | |
0617ffab TG |
212 | log_warning("Could not set address on interface %u: %s", |
213 | (unsigned)link->ifindex, strerror(-r)); | |
f882c247 TG |
214 | link_enter_failed(link); |
215 | } | |
216 | ||
217 | if (link->rtnl_messages == 0) | |
218 | link_enter_addresses_set(link); | |
219 | ||
220 | return 1; | |
221 | } | |
222 | ||
223 | static int link_enter_set_addresses(Link *link) { | |
224 | Address *address; | |
225 | int r; | |
226 | ||
227 | assert(link); | |
228 | assert(link->network); | |
229 | assert(link->rtnl_messages == 0); | |
230 | ||
231 | if (!link->network->addresses) | |
232 | return link_enter_addresses_set(link); | |
233 | ||
234 | link->state = LINK_STATE_SET_ADDRESSES; | |
235 | ||
236 | LIST_FOREACH(addresses, address, link->network->addresses) { | |
237 | r = address_configure(address, link, &address_handler); | |
238 | if (r < 0) | |
239 | link_enter_failed(link); | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static int link_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
246 | Link *link = userdata; | |
247 | int r; | |
248 | ||
249 | r = sd_rtnl_message_get_errno(m); | |
250 | if (r < 0) { | |
0617ffab TG |
251 | log_warning("Could not bring up interface %u: %s", |
252 | (unsigned)link->ifindex, strerror(-r)); | |
f882c247 TG |
253 | return link_enter_failed(link); |
254 | } | |
255 | ||
256 | link->flags |= IFF_UP; | |
257 | ||
258 | log_info("Link is UP."); | |
259 | ||
260 | if (link->state == LINK_STATE_ROUTES_SET) | |
261 | return link_enter_configured(link); | |
262 | ||
263 | return 1; | |
264 | } | |
265 | ||
266 | static int link_up(Link *link) { | |
f579559b TG |
267 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
268 | int r; | |
269 | ||
f882c247 TG |
270 | assert(link); |
271 | assert(link->manager); | |
272 | assert(link->manager->rtnl); | |
273 | ||
f579559b TG |
274 | r = sd_rtnl_message_link_new(RTM_NEWLINK, link->ifindex, 0, IFF_UP, &req); |
275 | if (r < 0) { | |
276 | log_error("Could not allocate RTM_NEWLINK message"); | |
277 | return r; | |
278 | } | |
279 | ||
f882c247 | 280 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_handler, link, 0, NULL); |
f579559b | 281 | if (r < 0) { |
f882c247 | 282 | log_error("Could not send rtnetlink message: %s", strerror(-r)); |
f579559b TG |
283 | return r; |
284 | } | |
285 | ||
f882c247 TG |
286 | return 0; |
287 | } | |
288 | ||
289 | int link_configure(Link *link) { | |
290 | int r; | |
291 | ||
292 | r = link_up(link); | |
293 | if (r < 0) | |
294 | return link_enter_failed(link); | |
295 | ||
296 | r = link_enter_set_addresses(link); | |
297 | if (r < 0) | |
298 | return link_enter_failed(link); | |
f579559b TG |
299 | |
300 | return 0; | |
301 | } |