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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; |
c166a070 | 33 | const char *ifname; |
f579559b TG |
34 | int r; |
35 | ||
36 | assert(device); | |
37 | assert(ret); | |
38 | ||
39 | link = new0(Link, 1); | |
40 | if (!link) | |
41 | return -ENOMEM; | |
42 | ||
5a3eb5a7 TG |
43 | link->manager = manager; |
44 | link->state = _LINK_STATE_INVALID; | |
45 | ||
0617ffab TG |
46 | link->ifindex = udev_device_get_ifindex(device); |
47 | if (link->ifindex <= 0) | |
f579559b TG |
48 | return -EINVAL; |
49 | ||
8cd11a0f | 50 | mac = udev_device_get_sysattr_value(device, "address"); |
5a3eb5a7 TG |
51 | if (mac) { |
52 | mac_addr = ether_aton(mac); | |
53 | if (mac_addr) | |
54 | memcpy(&link->mac, mac_addr, sizeof(struct ether_addr)); | |
55 | } | |
f579559b | 56 | |
c166a070 TG |
57 | ifname = udev_device_get_sysname(device); |
58 | link->ifname = strdup(ifname); | |
59 | ||
0617ffab | 60 | r = hashmap_put(manager->links, &link->ifindex, link); |
f579559b TG |
61 | if (r < 0) |
62 | return r; | |
63 | ||
64 | *ret = link; | |
65 | link = NULL; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | void link_free(Link *link) { | |
71 | if (!link) | |
72 | return; | |
73 | ||
0617ffab | 74 | assert(link->manager); |
f579559b | 75 | |
0617ffab | 76 | hashmap_remove(link->manager->links, &link->ifindex); |
f579559b | 77 | |
c166a070 TG |
78 | free(link->ifname); |
79 | ||
f579559b TG |
80 | free(link); |
81 | } | |
82 | ||
83 | int link_add(Manager *m, struct udev_device *device) { | |
84 | Link *link; | |
85 | Network *network; | |
86 | int r; | |
87 | uint64_t ifindex; | |
88 | ||
89 | assert(m); | |
90 | assert(device); | |
91 | ||
92 | ifindex = udev_device_get_ifindex(device); | |
93 | link = hashmap_get(m->links, &ifindex); | |
94 | if (link) | |
95 | return 0; | |
96 | ||
97 | r = link_new(m, device, &link); | |
98 | if (r < 0) { | |
c166a070 | 99 | log_error("Could not create link: %s", strerror(-r)); |
f579559b TG |
100 | return r; |
101 | } | |
102 | ||
103 | r = network_get(m, device, &network); | |
104 | if (r < 0) | |
105 | return r == -ENOENT ? 0 : r; | |
106 | ||
107 | r = network_apply(m, network, link); | |
108 | if (r < 0) | |
109 | return r; | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
f882c247 | 114 | static int link_enter_configured(Link *link) { |
c166a070 | 115 | log_info("Link '%s' configured", link->ifname); |
f882c247 TG |
116 | |
117 | link->state = LINK_STATE_CONFIGURED; | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | static int link_enter_failed(Link *link) { | |
c166a070 | 123 | log_warning("Could not configure link '%s'", link->ifname); |
f882c247 TG |
124 | |
125 | link->state = LINK_STATE_FAILED; | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static bool link_is_up(Link *link) { | |
131 | return link->flags & IFF_UP; | |
132 | } | |
133 | ||
134 | static int link_enter_routes_set(Link *link) { | |
c166a070 | 135 | log_info("Routes set for link '%s'", link->ifname); |
f882c247 TG |
136 | |
137 | if (link_is_up(link)) | |
138 | return link_enter_configured(link); | |
139 | ||
140 | link->state = LINK_STATE_ROUTES_SET; | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
146 | Link *link = userdata; | |
147 | int r; | |
148 | ||
149 | assert(link->rtnl_messages > 0); | |
150 | assert(link->state == LINK_STATE_SET_ROUTES || link->state == LINK_STATE_FAILED); | |
151 | ||
152 | link->rtnl_messages --; | |
153 | ||
154 | if (link->state == LINK_STATE_FAILED) | |
155 | return 1; | |
156 | ||
157 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
158 | if (r < 0 && r != -EEXIST) |
159 | log_warning("Could not set route on interface '%s': %s", | |
160 | link->ifname, strerror(-r)); | |
f882c247 TG |
161 | |
162 | if (link->rtnl_messages == 0) | |
163 | return link_enter_routes_set(link); | |
164 | ||
165 | return 1; | |
166 | } | |
167 | ||
168 | static int link_enter_set_routes(Link *link) { | |
169 | Route *route; | |
170 | int r; | |
171 | ||
172 | assert(link); | |
173 | assert(link->network); | |
174 | assert(link->rtnl_messages == 0); | |
175 | assert(link->state == LINK_STATE_ADDRESSES_SET); | |
176 | ||
177 | link->state = LINK_STATE_SET_ROUTES; | |
178 | ||
179 | if (!link->network->routes) | |
180 | return link_enter_routes_set(link); | |
181 | ||
182 | LIST_FOREACH(routes, route, link->network->routes) { | |
183 | r = route_configure(route, link, &route_handler); | |
184 | if (r < 0) | |
c166a070 TG |
185 | return link_enter_failed(link); |
186 | ||
187 | link->rtnl_messages ++; | |
f882c247 TG |
188 | } |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | static int link_enter_addresses_set(Link *link) { | |
c166a070 | 194 | log_info("Addresses set for link '%s'", link->ifname); |
f882c247 TG |
195 | |
196 | link->state = LINK_STATE_ADDRESSES_SET; | |
197 | ||
198 | return link_enter_set_routes(link); | |
199 | } | |
200 | ||
201 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
202 | Link *link = userdata; | |
203 | int r; | |
204 | ||
205 | assert(link->rtnl_messages > 0); | |
206 | assert(link->state == LINK_STATE_SET_ADDRESSES || link->state == LINK_STATE_FAILED); | |
207 | ||
208 | link->rtnl_messages --; | |
209 | ||
210 | if (link->state == LINK_STATE_FAILED) | |
211 | return 1; | |
212 | ||
213 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
214 | if (r < 0 && r != -EEXIST) |
215 | log_warning("Could not set address on interface '%s': %s", | |
216 | link->ifname, strerror(-r)); | |
f882c247 TG |
217 | |
218 | if (link->rtnl_messages == 0) | |
219 | link_enter_addresses_set(link); | |
220 | ||
221 | return 1; | |
222 | } | |
223 | ||
224 | static int link_enter_set_addresses(Link *link) { | |
225 | Address *address; | |
226 | int r; | |
227 | ||
228 | assert(link); | |
229 | assert(link->network); | |
230 | assert(link->rtnl_messages == 0); | |
231 | ||
232 | if (!link->network->addresses) | |
233 | return link_enter_addresses_set(link); | |
234 | ||
235 | link->state = LINK_STATE_SET_ADDRESSES; | |
236 | ||
237 | LIST_FOREACH(addresses, address, link->network->addresses) { | |
238 | r = address_configure(address, link, &address_handler); | |
239 | if (r < 0) | |
c166a070 TG |
240 | return link_enter_failed(link); |
241 | ||
242 | link->rtnl_messages ++; | |
f882c247 TG |
243 | } |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | static int link_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
249 | Link *link = userdata; | |
250 | int r; | |
251 | ||
252 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
253 | if (r < 0) |
254 | log_warning("Could not bring up interface '%s': %s", | |
255 | link->ifname, strerror(-r)); | |
f882c247 TG |
256 | |
257 | link->flags |= IFF_UP; | |
258 | ||
c166a070 | 259 | log_info("Link '%s' is up", link->ifname); |
f882c247 TG |
260 | |
261 | if (link->state == LINK_STATE_ROUTES_SET) | |
262 | return link_enter_configured(link); | |
263 | ||
264 | return 1; | |
265 | } | |
266 | ||
267 | static int link_up(Link *link) { | |
f579559b TG |
268 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
269 | int r; | |
270 | ||
f882c247 TG |
271 | assert(link); |
272 | assert(link->manager); | |
273 | assert(link->manager->rtnl); | |
274 | ||
f579559b TG |
275 | r = sd_rtnl_message_link_new(RTM_NEWLINK, link->ifindex, 0, IFF_UP, &req); |
276 | if (r < 0) { | |
277 | log_error("Could not allocate RTM_NEWLINK message"); | |
278 | return r; | |
279 | } | |
280 | ||
f882c247 | 281 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_handler, link, 0, NULL); |
f579559b | 282 | if (r < 0) { |
f882c247 | 283 | log_error("Could not send rtnetlink message: %s", strerror(-r)); |
f579559b TG |
284 | return r; |
285 | } | |
286 | ||
f882c247 TG |
287 | return 0; |
288 | } | |
289 | ||
290 | int link_configure(Link *link) { | |
291 | int r; | |
292 | ||
293 | r = link_up(link); | |
294 | if (r < 0) | |
295 | return link_enter_failed(link); | |
296 | ||
297 | r = link_enter_set_addresses(link); | |
298 | if (r < 0) | |
299 | return link_enter_failed(link); | |
f579559b TG |
300 | |
301 | return 0; | |
302 | } |