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Commit | Line | Data |
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cc73685d | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
cb0dc11b | 2 | |
d38dd64a CB |
3 | #ifndef _GNU_SOURCE |
4 | #define _GNU_SOURCE 1 | |
5 | #endif | |
6 | #include <arpa/inet.h> | |
cb0dc11b CB |
7 | #include <ctype.h> |
8 | #include <errno.h> | |
9 | #include <fcntl.h> | |
0ad19a3f | 10 | #include <linux/netlink.h> |
11 | #include <linux/rtnetlink.h> | |
12 | #include <linux/sockios.h> | |
cb0dc11b CB |
13 | #include <net/ethernet.h> |
14 | #include <net/if.h> | |
15 | #include <net/if_arp.h> | |
16 | #include <netinet/in.h> | |
d38dd64a CB |
17 | #include <stdio.h> |
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
cb0dc11b CB |
20 | #include <sys/inotify.h> |
21 | #include <sys/ioctl.h> | |
22 | #include <sys/param.h> | |
23 | #include <sys/socket.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/types.h> | |
d38dd64a CB |
26 | #include <time.h> |
27 | #include <unistd.h> | |
f549edcc | 28 | |
d38dd64a | 29 | #include "../include/netns_ifaddrs.h" |
7ab1ba02 | 30 | #include "af_unix.h" |
72d0e1cb | 31 | #include "conf.h" |
811ef482 | 32 | #include "config.h" |
e3233f26 | 33 | #include "file_utils.h" |
cb0dc11b | 34 | #include "log.h" |
8335fd40 | 35 | #include "macro.h" |
95ea3d1f | 36 | #include "memory_utils.h" |
cb0dc11b CB |
37 | #include "network.h" |
38 | #include "nl.h" | |
d7b58715 | 39 | #include "raw_syscalls.h" |
59524108 | 40 | #include "syscall_wrappers.h" |
0d204771 | 41 | #include "utils.h" |
0ad19a3f | 42 | |
9de31d5a CB |
43 | #ifndef HAVE_STRLCPY |
44 | #include "include/strlcpy.h" | |
45 | #endif | |
46 | ||
ac2cecc4 | 47 | lxc_log_define(network, lxc); |
f8fee0e2 | 48 | |
811ef482 | 49 | typedef int (*instantiate_cb)(struct lxc_handler *, struct lxc_netdev *); |
8bf64b77 | 50 | typedef int (*instantiate_ns_cb)(struct lxc_netdev *); |
3ebffb98 | 51 | static const char loop_device[] = "lo"; |
811ef482 | 52 | |
b670016a | 53 | static int lxc_ip_route_dest(__u16 nlmsg_type, int family, int ifindex, void *dest, unsigned int netmask) |
8f82874c | 54 | { |
d16bda44 | 55 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
8f82874c | 56 | struct nl_handler nlh; |
d16bda44 CB |
57 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
58 | int addrlen, err; | |
8f82874c | 59 | struct rtmsg *rt; |
8f82874c | 60 | |
61 | addrlen = family == AF_INET ? sizeof(struct in_addr) | |
62 | : sizeof(struct in6_addr); | |
63 | ||
d16bda44 | 64 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
8f82874c | 65 | if (err) |
66 | return err; | |
67 | ||
8f82874c | 68 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
69 | if (!nlmsg) | |
d16bda44 | 70 | return -ENOMEM; |
8f82874c | 71 | |
72 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); | |
73 | if (!answer) | |
a5f5cb41 | 74 | return -ENOMEM; |
8f82874c | 75 | |
76 | nlmsg->nlmsghdr->nlmsg_flags = | |
77 | NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; | |
b670016a | 78 | nlmsg->nlmsghdr->nlmsg_type = nlmsg_type; |
8f82874c | 79 | |
80 | rt = nlmsg_reserve(nlmsg, sizeof(struct rtmsg)); | |
81 | if (!rt) | |
a5f5cb41 | 82 | return -ENOMEM; |
d16bda44 | 83 | |
8f82874c | 84 | rt->rtm_family = family; |
85 | rt->rtm_table = RT_TABLE_MAIN; | |
86 | rt->rtm_scope = RT_SCOPE_LINK; | |
87 | rt->rtm_protocol = RTPROT_BOOT; | |
88 | rt->rtm_type = RTN_UNICAST; | |
89 | rt->rtm_dst_len = netmask; | |
90 | ||
8f82874c | 91 | if (nla_put_buffer(nlmsg, RTA_DST, dest, addrlen)) |
d16bda44 CB |
92 | return -EINVAL; |
93 | ||
8f82874c | 94 | if (nla_put_u32(nlmsg, RTA_OIF, ifindex)) |
d16bda44 CB |
95 | return -EINVAL; |
96 | ||
97 | return netlink_transaction(nlh_ptr, nlmsg, answer); | |
8f82874c | 98 | } |
99 | ||
100 | static int lxc_ipv4_dest_add(int ifindex, struct in_addr *dest, unsigned int netmask) | |
101 | { | |
b670016a | 102 | return lxc_ip_route_dest(RTM_NEWROUTE, AF_INET, ifindex, dest, netmask); |
8f82874c | 103 | } |
104 | ||
105 | static int lxc_ipv6_dest_add(int ifindex, struct in6_addr *dest, unsigned int netmask) | |
106 | { | |
b670016a | 107 | return lxc_ip_route_dest(RTM_NEWROUTE, AF_INET6, ifindex, dest, netmask); |
108 | } | |
109 | ||
110 | static int lxc_ipv4_dest_del(int ifindex, struct in_addr *dest, unsigned int netmask) | |
111 | { | |
112 | return lxc_ip_route_dest(RTM_DELROUTE, AF_INET, ifindex, dest, netmask); | |
113 | } | |
114 | ||
115 | static int lxc_ipv6_dest_del(int ifindex, struct in6_addr *dest, unsigned int netmask) | |
116 | { | |
117 | return lxc_ip_route_dest(RTM_DELROUTE, AF_INET6, ifindex, dest, netmask); | |
8f82874c | 118 | } |
119 | ||
d4a7da46 | 120 | static int lxc_setup_ipv4_routes(struct lxc_list *ip, int ifindex) |
121 | { | |
122 | struct lxc_list *iterator; | |
123 | int err; | |
124 | ||
125 | lxc_list_for_each(iterator, ip) { | |
126 | struct lxc_inetdev *inetdev = iterator->elem; | |
127 | ||
128 | err = lxc_ipv4_dest_add(ifindex, &inetdev->addr, inetdev->prefix); | |
9c66dc4f CB |
129 | if (err) |
130 | return log_error_errno(-1, -err, "Failed to setup ipv4 route for network device with ifindex %d", ifindex); | |
d4a7da46 | 131 | } |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static int lxc_setup_ipv6_routes(struct lxc_list *ip, int ifindex) | |
137 | { | |
138 | struct lxc_list *iterator; | |
139 | int err; | |
140 | ||
141 | lxc_list_for_each(iterator, ip) { | |
142 | struct lxc_inet6dev *inet6dev = iterator->elem; | |
143 | ||
144 | err = lxc_ipv6_dest_add(ifindex, &inet6dev->addr, inet6dev->prefix); | |
9c66dc4f CB |
145 | if (err) |
146 | return log_error_errno(-1, -err, "Failed to setup ipv6 route for network device with ifindex %d", ifindex); | |
d4a7da46 | 147 | } |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
6dfa9581 TP |
152 | static int setup_ipv4_addr_routes(struct lxc_list *ip, int ifindex) |
153 | { | |
154 | struct lxc_list *iterator; | |
155 | int err; | |
156 | ||
157 | lxc_list_for_each(iterator, ip) { | |
158 | struct lxc_inetdev *inetdev = iterator->elem; | |
159 | ||
160 | err = lxc_ipv4_dest_add(ifindex, &inetdev->addr, 32); | |
161 | ||
162 | if (err) | |
9c66dc4f | 163 | return log_error_errno(-1, err, "Failed to setup ipv4 address route for network device with eifindex %d", ifindex); |
6dfa9581 TP |
164 | } |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | static int setup_ipv6_addr_routes(struct lxc_list *ip, int ifindex) | |
170 | { | |
171 | struct lxc_list *iterator; | |
172 | int err; | |
173 | ||
174 | lxc_list_for_each(iterator, ip) { | |
175 | struct lxc_inet6dev *inet6dev = iterator->elem; | |
176 | ||
177 | err = lxc_ipv6_dest_add(ifindex, &inet6dev->addr, 128); | |
178 | if (err) | |
9c66dc4f | 179 | return log_error_errno(-1, err, "Failed to setup ipv6 address route for network device with eifindex %d", ifindex); |
6dfa9581 TP |
180 | } |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
185 | struct ip_proxy_args { | |
186 | const char *ip; | |
187 | const char *dev; | |
188 | }; | |
189 | ||
5fe147e9 | 190 | static int lxc_ip_neigh_proxy(__u16 nlmsg_type, int family, int ifindex, void *dest) |
6dfa9581 | 191 | { |
d16bda44 | 192 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
5fe147e9 | 193 | struct nl_handler nlh; |
d16bda44 CB |
194 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
195 | int addrlen, err; | |
5fe147e9 | 196 | struct ndmsg *rt; |
6dfa9581 | 197 | |
5fe147e9 | 198 | addrlen = family == AF_INET ? sizeof(struct in_addr) : sizeof(struct in6_addr); |
6dfa9581 | 199 | |
d16bda44 | 200 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
5fe147e9 TP |
201 | if (err) |
202 | return err; | |
6dfa9581 | 203 | |
5fe147e9 TP |
204 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
205 | if (!nlmsg) | |
d16bda44 | 206 | return -ENOMEM; |
6dfa9581 | 207 | |
5fe147e9 TP |
208 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
209 | if (!answer) | |
d16bda44 | 210 | return -ENOMEM; |
6dfa9581 | 211 | |
5fe147e9 TP |
212 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
213 | nlmsg->nlmsghdr->nlmsg_type = nlmsg_type; | |
6dfa9581 | 214 | |
5fe147e9 TP |
215 | rt = nlmsg_reserve(nlmsg, sizeof(struct ndmsg)); |
216 | if (!rt) | |
d16bda44 CB |
217 | return -ENOMEM; |
218 | ||
5fe147e9 TP |
219 | rt->ndm_ifindex = ifindex; |
220 | rt->ndm_flags = NTF_PROXY; | |
221 | rt->ndm_type = NDA_DST; | |
222 | rt->ndm_family = family; | |
6dfa9581 | 223 | |
5fe147e9 | 224 | if (nla_put_buffer(nlmsg, NDA_DST, dest, addrlen)) |
d16bda44 | 225 | return -EINVAL; |
6dfa9581 | 226 | |
d16bda44 | 227 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
6dfa9581 TP |
228 | } |
229 | ||
230 | static int lxc_is_ip_forwarding_enabled(const char *ifname, int family) | |
231 | { | |
232 | int ret; | |
233 | char path[PATH_MAX]; | |
234 | char buf[1] = ""; | |
235 | ||
236 | if (family != AF_INET && family != AF_INET6) | |
596a002c | 237 | return ret_set_errno(-1, EINVAL); |
6dfa9581 | 238 | |
9c66dc4f | 239 | ret = snprintf(path, sizeof(path), "/proc/sys/net/%s/conf/%s/%s", |
6dfa9581 TP |
240 | family == AF_INET ? "ipv4" : "ipv6", ifname, |
241 | "forwarding"); | |
9c66dc4f | 242 | if (ret < 0 || (size_t)ret >= sizeof(path)) |
596a002c | 243 | return ret_set_errno(-1, E2BIG); |
6dfa9581 TP |
244 | |
245 | return lxc_read_file_expect(path, buf, 1, "1"); | |
246 | } | |
247 | ||
811ef482 CB |
248 | static int instantiate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
249 | { | |
54256301 | 250 | int err; |
a00fbab5 | 251 | unsigned int mtu = 1500; |
811ef482 CB |
252 | char *veth1, *veth2; |
253 | char veth1buf[IFNAMSIZ], veth2buf[IFNAMSIZ]; | |
811ef482 | 254 | |
f2711167 | 255 | if (!is_empty_string(netdev->priv.veth_attr.pair)) { |
811ef482 CB |
256 | veth1 = netdev->priv.veth_attr.pair; |
257 | if (handler->conf->reboot) | |
258 | lxc_netdev_delete_by_name(veth1); | |
259 | } else { | |
260 | err = snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); | |
261 | if (err < 0 || (size_t)err >= sizeof(veth1buf)) | |
262 | return -1; | |
263 | ||
3646ffd9 | 264 | veth1 = lxc_ifname_alnum_case_sensitive(veth1buf); |
811ef482 CB |
265 | if (!veth1) |
266 | return -1; | |
267 | ||
268 | /* store away for deconf */ | |
269 | memcpy(netdev->priv.veth_attr.veth1, veth1, IFNAMSIZ); | |
270 | } | |
271 | ||
d34212ad CB |
272 | err = snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
273 | if (err < 0 || (size_t)err >= sizeof(veth2buf)) | |
274 | return -1; | |
275 | ||
3646ffd9 | 276 | veth2 = lxc_ifname_alnum_case_sensitive(veth2buf); |
811ef482 | 277 | if (!veth2) |
54256301 CB |
278 | return -1; |
279 | ||
a00fbab5 TP |
280 | /* if mtu is specified in config then use that, otherwise inherit from link device if provided. */ |
281 | if (netdev->mtu) { | |
282 | if (lxc_safe_uint(netdev->mtu, &mtu)) | |
283 | return log_error_errno(-1, errno, "Failed to parse mtu"); | |
f2711167 | 284 | } else if (!is_empty_string(netdev->link)) { |
54256301 | 285 | int ifindex_mtu; |
811ef482 | 286 | |
54256301 CB |
287 | ifindex_mtu = if_nametoindex(netdev->link); |
288 | if (ifindex_mtu) { | |
289 | mtu = netdev_get_mtu(ifindex_mtu); | |
290 | INFO("Retrieved mtu %d from %s", mtu, netdev->link); | |
291 | } | |
292 | } | |
293 | ||
294 | err = lxc_veth_create(veth1, veth2, handler->pid, mtu); | |
9c66dc4f CB |
295 | if (err) |
296 | return log_error_errno(-1, -err, "Failed to create veth pair \"%s\" and \"%s\"", veth1, veth2); | |
811ef482 | 297 | |
24190194 CB |
298 | strlcpy(netdev->created_name, veth2, IFNAMSIZ); |
299 | ||
811ef482 CB |
300 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
301 | * will always keep the host's mac address and not take the mac address | |
302 | * of a container */ | |
303 | err = setup_private_host_hw_addr(veth1); | |
304 | if (err) { | |
6d1400b5 | 305 | errno = -err; |
306 | SYSERROR("Failed to change mac address of host interface \"%s\"", veth1); | |
811ef482 CB |
307 | goto out_delete; |
308 | } | |
309 | ||
8da62485 CB |
310 | /* Retrieve ifindex of the host's veth device. */ |
311 | netdev->priv.veth_attr.ifindex = if_nametoindex(veth1); | |
312 | if (!netdev->priv.veth_attr.ifindex) { | |
313 | ERROR("Failed to retrieve ifindex for \"%s\"", veth1); | |
314 | goto out_delete; | |
315 | } | |
316 | ||
811ef482 CB |
317 | if (mtu) { |
318 | err = lxc_netdev_set_mtu(veth1, mtu); | |
811ef482 | 319 | if (err) { |
6d1400b5 | 320 | errno = -err; |
54256301 | 321 | SYSERROR("Failed to set mtu \"%d\" for veth pair \"%s\" ", mtu, veth1); |
811ef482 CB |
322 | goto out_delete; |
323 | } | |
324 | } | |
325 | ||
f2711167 | 326 | if (!is_empty_string(netdev->link) && netdev->priv.veth_attr.mode == VETH_MODE_BRIDGE) { |
811ef482 CB |
327 | err = lxc_bridge_attach(netdev->link, veth1); |
328 | if (err) { | |
6d1400b5 | 329 | errno = -err; |
330 | SYSERROR("Failed to attach \"%s\" to bridge \"%s\"", | |
331 | veth1, netdev->link); | |
811ef482 CB |
332 | goto out_delete; |
333 | } | |
334 | INFO("Attached \"%s\" to bridge \"%s\"", veth1, netdev->link); | |
335 | } | |
336 | ||
337 | err = lxc_netdev_up(veth1); | |
338 | if (err) { | |
6d1400b5 | 339 | errno = -err; |
340 | SYSERROR("Failed to set \"%s\" up", veth1); | |
811ef482 CB |
341 | goto out_delete; |
342 | } | |
343 | ||
d4a7da46 | 344 | /* setup ipv4 routes on the host interface */ |
345 | if (lxc_setup_ipv4_routes(&netdev->priv.veth_attr.ipv4_routes, netdev->priv.veth_attr.ifindex)) { | |
346 | ERROR("Failed to setup ipv4 routes for network device \"%s\"", veth1); | |
347 | goto out_delete; | |
348 | } | |
349 | ||
350 | /* setup ipv6 routes on the host interface */ | |
351 | if (lxc_setup_ipv6_routes(&netdev->priv.veth_attr.ipv6_routes, netdev->priv.veth_attr.ifindex)) { | |
352 | ERROR("Failed to setup ipv6 routes for network device \"%s\"", veth1); | |
353 | goto out_delete; | |
354 | } | |
355 | ||
6dfa9581 | 356 | if (netdev->priv.veth_attr.mode == VETH_MODE_ROUTER) { |
954e36b4 TP |
357 | /* sleep for a short period of time to work around a bug that intermittently prevents IP neighbour |
358 | proxy entries from being added using lxc_ip_neigh_proxy below. When the issue occurs the entries | |
359 | appear to be added successfully but then do not appear in the proxy list. The length of time | |
360 | slept doesn't appear to be important, only that the process sleeps for a short period of time. | |
361 | */ | |
362 | nanosleep((const struct timespec[]){{0, 1000}}, NULL); | |
363 | ||
6dfa9581 TP |
364 | if (netdev->ipv4_gateway) { |
365 | char bufinet4[INET_ADDRSTRLEN]; | |
366 | if (!inet_ntop(AF_INET, netdev->ipv4_gateway, bufinet4, sizeof(bufinet4))) { | |
9c66dc4f | 367 | SYSERROR("Failed to convert gateway ipv4 address on \"%s\"", veth1); |
6dfa9581 TP |
368 | goto out_delete; |
369 | } | |
370 | ||
371 | err = lxc_ip_forwarding_on(veth1, AF_INET); | |
372 | if (err) { | |
9c66dc4f | 373 | SYSERROR("Failed to activate ipv4 forwarding on \"%s\"", veth1); |
6dfa9581 TP |
374 | goto out_delete; |
375 | } | |
376 | ||
5fe147e9 | 377 | err = lxc_ip_neigh_proxy(RTM_NEWNEIGH, AF_INET, netdev->priv.veth_attr.ifindex, netdev->ipv4_gateway); |
6dfa9581 | 378 | if (err) { |
9c66dc4f | 379 | SYSERROR("Failed to add gateway ipv4 proxy on \"%s\"", veth1); |
6dfa9581 TP |
380 | goto out_delete; |
381 | } | |
382 | } | |
383 | ||
384 | if (netdev->ipv6_gateway) { | |
385 | char bufinet6[INET6_ADDRSTRLEN]; | |
386 | ||
387 | if (!inet_ntop(AF_INET6, netdev->ipv6_gateway, bufinet6, sizeof(bufinet6))) { | |
9c66dc4f | 388 | SYSERROR("Failed to convert gateway ipv6 address on \"%s\"", veth1); |
6dfa9581 TP |
389 | goto out_delete; |
390 | } | |
391 | ||
392 | /* Check for sysctl net.ipv6.conf.all.forwarding=1 | |
393 | Kernel requires this to route any packets for IPv6. | |
394 | */ | |
395 | err = lxc_is_ip_forwarding_enabled("all", AF_INET6); | |
396 | if (err) { | |
9c66dc4f | 397 | SYSERROR("Requires sysctl net.ipv6.conf.all.forwarding=1"); |
6dfa9581 TP |
398 | goto out_delete; |
399 | } | |
400 | ||
401 | err = lxc_ip_forwarding_on(veth1, AF_INET6); | |
402 | if (err) { | |
9c66dc4f | 403 | SYSERROR("Failed to activate ipv6 forwarding on \"%s\"", veth1); |
6dfa9581 TP |
404 | goto out_delete; |
405 | } | |
406 | ||
407 | err = lxc_neigh_proxy_on(veth1, AF_INET6); | |
408 | if (err) { | |
9c66dc4f | 409 | SYSERROR("Failed to activate proxy ndp on \"%s\"", veth1); |
6dfa9581 TP |
410 | goto out_delete; |
411 | } | |
412 | ||
5fe147e9 | 413 | err = lxc_ip_neigh_proxy(RTM_NEWNEIGH, AF_INET6, netdev->priv.veth_attr.ifindex, netdev->ipv6_gateway); |
6dfa9581 | 414 | if (err) { |
9c66dc4f | 415 | SYSERROR("Failed to add gateway ipv6 proxy on \"%s\"", veth1); |
6dfa9581 TP |
416 | goto out_delete; |
417 | } | |
418 | } | |
419 | ||
420 | /* setup ipv4 address routes on the host interface */ | |
421 | err = setup_ipv4_addr_routes(&netdev->ipv4, netdev->priv.veth_attr.ifindex); | |
422 | if (err) { | |
9c66dc4f | 423 | SYSERROR("Failed to setup ip address routes for network device \"%s\"", veth1); |
6dfa9581 TP |
424 | goto out_delete; |
425 | } | |
426 | ||
427 | /* setup ipv6 address routes on the host interface */ | |
428 | err = setup_ipv6_addr_routes(&netdev->ipv6, netdev->priv.veth_attr.ifindex); | |
429 | if (err) { | |
9c66dc4f | 430 | SYSERROR("Failed to setup ip address routes for network device \"%s\"", veth1); |
6dfa9581 TP |
431 | goto out_delete; |
432 | } | |
433 | } | |
434 | ||
811ef482 | 435 | if (netdev->upscript) { |
14a7b0f9 CB |
436 | char *argv[] = { |
437 | "veth", | |
438 | netdev->link, | |
990b9ac3 | 439 | veth1, |
14a7b0f9 CB |
440 | NULL, |
441 | }; | |
442 | ||
443 | err = run_script_argv(handler->name, | |
444 | handler->conf->hooks_version, "net", | |
445 | netdev->upscript, "up", argv); | |
446 | if (err < 0) | |
811ef482 CB |
447 | goto out_delete; |
448 | } | |
449 | ||
54256301 | 450 | DEBUG("Instantiated veth tunnel \"%s <--> %s\"", veth1, veth2); |
811ef482 CB |
451 | |
452 | return 0; | |
453 | ||
454 | out_delete: | |
54256301 | 455 | lxc_netdev_delete_by_name(veth1); |
811ef482 CB |
456 | return -1; |
457 | } | |
458 | ||
459 | static int instantiate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
460 | { | |
8021de25 | 461 | char peer[IFNAMSIZ]; |
811ef482 CB |
462 | int err; |
463 | ||
f2711167 | 464 | if (is_empty_string(netdev->link)) { |
811ef482 CB |
465 | ERROR("No link for macvlan network device specified"); |
466 | return -1; | |
467 | } | |
468 | ||
8021de25 CB |
469 | err = snprintf(peer, sizeof(peer), "mcXXXXXX"); |
470 | if (err < 0 || (size_t)err >= sizeof(peer)) | |
811ef482 CB |
471 | return -1; |
472 | ||
3646ffd9 | 473 | if (!lxc_ifname_alnum_case_sensitive(peer)) |
811ef482 CB |
474 | return -1; |
475 | ||
476 | err = lxc_macvlan_create(netdev->link, peer, | |
477 | netdev->priv.macvlan_attr.mode); | |
478 | if (err) { | |
6d1400b5 | 479 | errno = -err; |
480 | SYSERROR("Failed to create macvlan interface \"%s\" on \"%s\"", | |
481 | peer, netdev->link); | |
966e9f1f | 482 | goto on_error; |
811ef482 CB |
483 | } |
484 | ||
a9704f05 | 485 | strlcpy(netdev->created_name, peer, IFNAMSIZ); |
3473ca76 | 486 | if (is_empty_string(netdev->name)) |
8bf64b77 | 487 | (void)strlcpy(netdev->name, peer, IFNAMSIZ); |
a9704f05 | 488 | |
811ef482 CB |
489 | netdev->ifindex = if_nametoindex(peer); |
490 | if (!netdev->ifindex) { | |
491 | ERROR("Failed to retrieve ifindex for \"%s\"", peer); | |
966e9f1f | 492 | goto on_error; |
811ef482 CB |
493 | } |
494 | ||
3bef7b7b | 495 | if (netdev->mtu) { |
54256301 CB |
496 | unsigned int mtu; |
497 | ||
3bef7b7b TP |
498 | err = lxc_safe_uint(netdev->mtu, &mtu); |
499 | if (err < 0) { | |
500 | errno = -err; | |
501 | SYSERROR("Failed to parse mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); | |
502 | goto on_error; | |
503 | } | |
504 | ||
505 | err = lxc_netdev_set_mtu(peer, mtu); | |
506 | if (err < 0) { | |
507 | errno = -err; | |
508 | SYSERROR("Failed to set mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); | |
509 | goto on_error; | |
510 | } | |
511 | } | |
512 | ||
811ef482 | 513 | if (netdev->upscript) { |
14a7b0f9 CB |
514 | char *argv[] = { |
515 | "macvlan", | |
516 | netdev->link, | |
517 | NULL, | |
518 | }; | |
519 | ||
520 | err = run_script_argv(handler->name, | |
521 | handler->conf->hooks_version, "net", | |
522 | netdev->upscript, "up", argv); | |
523 | if (err < 0) | |
966e9f1f | 524 | goto on_error; |
811ef482 CB |
525 | } |
526 | ||
527 | DEBUG("Instantiated macvlan \"%s\" with ifindex is %d and mode %d", | |
528 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
529 | ||
530 | return 0; | |
966e9f1f CB |
531 | |
532 | on_error: | |
811ef482 | 533 | lxc_netdev_delete_by_name(peer); |
811ef482 CB |
534 | return -1; |
535 | } | |
536 | ||
c9f52382 | 537 | static int lxc_ipvlan_create(const char *master, const char *name, int mode, int isolation) |
538 | { | |
d16bda44 CB |
539 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
540 | struct nl_handler nlh; | |
541 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
c9f52382 | 542 | int err, index, len; |
543 | struct ifinfomsg *ifi; | |
c9f52382 | 544 | struct rtattr *nest, *nest2; |
c9f52382 | 545 | |
546 | len = strlen(master); | |
547 | if (len == 1 || len >= IFNAMSIZ) | |
d16bda44 | 548 | return ret_errno(EINVAL); |
c9f52382 | 549 | |
550 | len = strlen(name); | |
551 | if (len == 1 || len >= IFNAMSIZ) | |
d16bda44 | 552 | return ret_errno(EINVAL); |
c9f52382 | 553 | |
554 | index = if_nametoindex(master); | |
555 | if (!index) | |
d16bda44 | 556 | return ret_errno(EINVAL); |
c9f52382 | 557 | |
d16bda44 | 558 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
c9f52382 | 559 | if (err) |
d16bda44 | 560 | return ret_errno(-err); |
c9f52382 | 561 | |
c9f52382 | 562 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
563 | if (!nlmsg) | |
d16bda44 | 564 | return ret_errno(ENOMEM); |
c9f52382 | 565 | |
566 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); | |
567 | if (!answer) | |
d16bda44 | 568 | return ret_errno(ENOMEM); |
c9f52382 | 569 | |
570 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; | |
571 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; | |
572 | ||
573 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
d16bda44 CB |
574 | if (!ifi) |
575 | return ret_errno(ENOMEM); | |
c9f52382 | 576 | ifi->ifi_family = AF_UNSPEC; |
577 | ||
c9f52382 | 578 | nest = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
579 | if (!nest) | |
d16bda44 | 580 | return ret_errno(EPROTO); |
c9f52382 | 581 | |
582 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "ipvlan")) | |
d16bda44 | 583 | return ret_errno(EPROTO); |
c9f52382 | 584 | |
5755765e KT |
585 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); |
586 | if (!nest2) | |
587 | return ret_errno(EPROTO); | |
588 | ||
589 | if (nla_put_u32(nlmsg, IFLA_IPVLAN_MODE, mode)) | |
590 | return ret_errno(EPROTO); | |
591 | ||
cf88a827 TP |
592 | /* if_link.h does not define the isolation flag value for bridge mode (unlike IPVLAN_F_PRIVATE and |
593 | * IPVLAN_F_VEPA) so we define it as 0 and only send mode if mode >0 as default mode is bridge anyway | |
594 | * according to ipvlan docs. | |
5755765e | 595 | */ |
cf88a827 | 596 | if (isolation > 0 && nla_put_u16(nlmsg, IFLA_IPVLAN_ISOLATION, isolation)) |
5755765e | 597 | return ret_errno(EPROTO); |
c9f52382 | 598 | |
5755765e | 599 | nla_end_nested(nlmsg, nest2); |
c9f52382 | 600 | nla_end_nested(nlmsg, nest); |
601 | ||
602 | if (nla_put_u32(nlmsg, IFLA_LINK, index)) | |
d16bda44 | 603 | return ret_errno(EPROTO); |
c9f52382 | 604 | |
605 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
d16bda44 CB |
606 | return ret_errno(EPROTO); |
607 | ||
608 | return netlink_transaction(nlh_ptr, nlmsg, answer); | |
c9f52382 | 609 | } |
610 | ||
611 | static int instantiate_ipvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
612 | { | |
dd119206 | 613 | char peer[IFNAMSIZ]; |
c9f52382 | 614 | int err; |
615 | ||
f2711167 | 616 | if (is_empty_string(netdev->link)) { |
c9f52382 | 617 | ERROR("No link for ipvlan network device specified"); |
618 | return -1; | |
619 | } | |
620 | ||
dd119206 CB |
621 | err = snprintf(peer, sizeof(peer), "ipXXXXXX"); |
622 | if (err < 0 || (size_t)err >= sizeof(peer)) | |
c9f52382 | 623 | return -1; |
624 | ||
3646ffd9 | 625 | if (!lxc_ifname_alnum_case_sensitive(peer)) |
c9f52382 | 626 | return -1; |
627 | ||
dd119206 CB |
628 | err = lxc_ipvlan_create(netdev->link, peer, netdev->priv.ipvlan_attr.mode, |
629 | netdev->priv.ipvlan_attr.isolation); | |
c9f52382 | 630 | if (err) { |
dd119206 CB |
631 | SYSERROR("Failed to create ipvlan interface \"%s\" on \"%s\"", |
632 | peer, netdev->link); | |
c9f52382 | 633 | goto on_error; |
634 | } | |
635 | ||
e7fdd504 | 636 | strlcpy(netdev->created_name, peer, IFNAMSIZ); |
3473ca76 | 637 | if (is_empty_string(netdev->name)) |
8bf64b77 | 638 | (void)strlcpy(netdev->name, peer, IFNAMSIZ); |
e7fdd504 | 639 | |
c9f52382 | 640 | netdev->ifindex = if_nametoindex(peer); |
641 | if (!netdev->ifindex) { | |
642 | ERROR("Failed to retrieve ifindex for \"%s\"", peer); | |
643 | goto on_error; | |
644 | } | |
645 | ||
006e135e | 646 | if (netdev->mtu) { |
54256301 CB |
647 | unsigned int mtu; |
648 | ||
006e135e | 649 | err = lxc_safe_uint(netdev->mtu, &mtu); |
650 | if (err < 0) { | |
651 | errno = -err; | |
54256301 | 652 | SYSERROR("Failed to parse mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); |
006e135e | 653 | goto on_error; |
654 | } | |
655 | ||
656 | err = lxc_netdev_set_mtu(peer, mtu); | |
657 | if (err < 0) { | |
658 | errno = -err; | |
54256301 | 659 | SYSERROR("Failed to set mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); |
006e135e | 660 | goto on_error; |
661 | } | |
662 | } | |
663 | ||
c9f52382 | 664 | if (netdev->upscript) { |
665 | char *argv[] = { | |
666 | "ipvlan", | |
667 | netdev->link, | |
668 | NULL, | |
669 | }; | |
670 | ||
dd119206 CB |
671 | err = run_script_argv(handler->name, handler->conf->hooks_version, |
672 | "net", netdev->upscript, "up", argv); | |
c9f52382 | 673 | if (err < 0) |
674 | goto on_error; | |
675 | } | |
676 | ||
dd119206 CB |
677 | DEBUG("Instantiated ipvlan \"%s\" with ifindex is %d and mode %d", peer, |
678 | netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
c9f52382 | 679 | |
680 | return 0; | |
681 | ||
682 | on_error: | |
683 | lxc_netdev_delete_by_name(peer); | |
684 | return -1; | |
685 | } | |
686 | ||
811ef482 CB |
687 | static int instantiate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
688 | { | |
689 | char peer[IFNAMSIZ]; | |
690 | int err; | |
691 | static uint16_t vlan_cntr = 0; | |
811ef482 | 692 | |
f2711167 | 693 | if (is_empty_string(netdev->link)) { |
811ef482 CB |
694 | ERROR("No link for vlan network device specified"); |
695 | return -1; | |
696 | } | |
697 | ||
d4d68410 CB |
698 | err = snprintf(peer, sizeof(peer), "vlan%d-%d", |
699 | netdev->priv.vlan_attr.vid, vlan_cntr++); | |
811ef482 CB |
700 | if (err < 0 || (size_t)err >= sizeof(peer)) |
701 | return -1; | |
702 | ||
703 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); | |
704 | if (err) { | |
6d1400b5 | 705 | errno = -err; |
706 | SYSERROR("Failed to create vlan interface \"%s\" on \"%s\"", | |
707 | peer, netdev->link); | |
811ef482 CB |
708 | return -1; |
709 | } | |
710 | ||
83530dba | 711 | strlcpy(netdev->created_name, peer, IFNAMSIZ); |
3473ca76 | 712 | if (is_empty_string(netdev->name)) |
8bf64b77 | 713 | (void)strlcpy(netdev->name, peer, IFNAMSIZ); |
83530dba | 714 | |
811ef482 CB |
715 | netdev->ifindex = if_nametoindex(peer); |
716 | if (!netdev->ifindex) { | |
717 | ERROR("Failed to retrieve ifindex for \"%s\"", peer); | |
3e2a7b08 | 718 | goto on_error; |
719 | } | |
720 | ||
721 | if (netdev->mtu) { | |
54256301 CB |
722 | unsigned int mtu; |
723 | ||
3e2a7b08 | 724 | err = lxc_safe_uint(netdev->mtu, &mtu); |
725 | if (err < 0) { | |
726 | errno = -err; | |
54256301 | 727 | SYSERROR("Failed to parse mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); |
3e2a7b08 | 728 | goto on_error; |
729 | } | |
730 | ||
731 | err = lxc_netdev_set_mtu(peer, mtu); | |
54256301 | 732 | if (err < 0) { |
3e2a7b08 | 733 | errno = -err; |
54256301 | 734 | SYSERROR("Failed to set mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); |
3e2a7b08 | 735 | goto on_error; |
736 | } | |
811ef482 CB |
737 | } |
738 | ||
3a73d9f1 | 739 | if (netdev->upscript) { |
740 | char *argv[] = { | |
741 | "vlan", | |
742 | netdev->link, | |
743 | NULL, | |
744 | }; | |
745 | ||
d4d68410 CB |
746 | err = run_script_argv(handler->name, handler->conf->hooks_version, |
747 | "net", netdev->upscript, "up", argv); | |
19abca58 | 748 | if (err < 0) { |
3e2a7b08 | 749 | goto on_error; |
19abca58 | 750 | } |
3a73d9f1 | 751 | } |
752 | ||
d4d68410 CB |
753 | DEBUG("Instantiated vlan \"%s\" with ifindex is \"%d\"", peer, |
754 | netdev->ifindex); | |
811ef482 CB |
755 | |
756 | return 0; | |
3e2a7b08 | 757 | |
758 | on_error: | |
759 | lxc_netdev_delete_by_name(peer); | |
760 | return -1; | |
811ef482 CB |
761 | } |
762 | ||
763 | static int instantiate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
764 | { | |
0b154989 | 765 | int err, mtu_orig = 0; |
14a7b0f9 | 766 | |
9c66dc4f CB |
767 | if (is_empty_string(netdev->link)) |
768 | return log_error_errno(-1, errno, "No link for physical interface specified"); | |
811ef482 | 769 | |
75b074ee CB |
770 | /* |
771 | * Note that we're retrieving the container's ifindex in the host's | |
790255cf CB |
772 | * network namespace because we need it to move the device from the |
773 | * host's network namespace to the container's network namespace later | |
774 | * on. | |
775 | * Note that netdev->link will contain the name of the physical network | |
776 | * device in the host's namespace. | |
777 | */ | |
811ef482 | 778 | netdev->ifindex = if_nametoindex(netdev->link); |
9c66dc4f CB |
779 | if (!netdev->ifindex) |
780 | return log_error_errno(-1, errno, "Failed to retrieve ifindex for \"%s\"", netdev->link); | |
811ef482 | 781 | |
61302ef7 | 782 | strlcpy(netdev->created_name, netdev->link, IFNAMSIZ); |
3473ca76 | 783 | if (is_empty_string(netdev->name)) |
8bf64b77 | 784 | (void)strlcpy(netdev->name, netdev->link, IFNAMSIZ); |
61302ef7 | 785 | |
75b074ee CB |
786 | /* |
787 | * Store the ifindex of the host's network device in the host's | |
790255cf CB |
788 | * namespace. |
789 | */ | |
790 | netdev->priv.phys_attr.ifindex = netdev->ifindex; | |
791 | ||
75b074ee CB |
792 | /* |
793 | * Get original device MTU setting and store for restoration after | |
794 | * container shutdown. | |
795 | */ | |
0b154989 | 796 | mtu_orig = netdev_get_mtu(netdev->ifindex); |
9c66dc4f CB |
797 | if (mtu_orig < 0) |
798 | return log_error_errno(-1, -mtu_orig, "Failed to get original mtu for interface \"%s\"", netdev->link); | |
0b154989 TP |
799 | |
800 | netdev->priv.phys_attr.mtu = mtu_orig; | |
801 | ||
3bef7b7b | 802 | if (netdev->mtu) { |
54256301 CB |
803 | unsigned int mtu; |
804 | ||
3bef7b7b | 805 | err = lxc_safe_uint(netdev->mtu, &mtu); |
9c66dc4f CB |
806 | if (err < 0) |
807 | return log_error_errno(-1, -err, "Failed to parse mtu \"%s\" for interface \"%s\"", netdev->mtu, netdev->link); | |
14a7b0f9 | 808 | |
3bef7b7b | 809 | err = lxc_netdev_set_mtu(netdev->link, mtu); |
9c66dc4f CB |
810 | if (err < 0) |
811 | return log_error_errno(-1, -err, "Failed to set mtu \"%s\" for interface \"%s\"", netdev->mtu, netdev->link); | |
3bef7b7b TP |
812 | } |
813 | ||
814 | if (netdev->upscript) { | |
815 | char *argv[] = { | |
816 | "phys", | |
817 | netdev->link, | |
818 | NULL, | |
819 | }; | |
820 | ||
75b074ee CB |
821 | err = run_script_argv(handler->name, handler->conf->hooks_version, |
822 | "net", netdev->upscript, "up", argv); | |
9c66dc4f | 823 | if (err < 0) |
3bef7b7b | 824 | return -1; |
3bef7b7b TP |
825 | } |
826 | ||
75b074ee CB |
827 | DEBUG("Instantiated phys \"%s\" with ifindex is \"%d\"", netdev->link, |
828 | netdev->ifindex); | |
811ef482 CB |
829 | |
830 | return 0; | |
831 | } | |
832 | ||
833 | static int instantiate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
834 | { | |
14a7b0f9 CB |
835 | int ret; |
836 | char *argv[] = { | |
837 | "empty", | |
838 | NULL, | |
839 | }; | |
840 | ||
811ef482 | 841 | netdev->ifindex = 0; |
14a7b0f9 CB |
842 | if (!netdev->upscript) |
843 | return 0; | |
844 | ||
845 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
846 | "net", netdev->upscript, "up", argv); | |
847 | if (ret < 0) | |
848 | return -1; | |
849 | ||
811ef482 CB |
850 | return 0; |
851 | } | |
852 | ||
853 | static int instantiate_none(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
854 | { | |
855 | netdev->ifindex = 0; | |
856 | return 0; | |
857 | } | |
858 | ||
859 | static instantiate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { | |
860 | [LXC_NET_VETH] = instantiate_veth, | |
861 | [LXC_NET_MACVLAN] = instantiate_macvlan, | |
c9f52382 | 862 | [LXC_NET_IPVLAN] = instantiate_ipvlan, |
811ef482 CB |
863 | [LXC_NET_VLAN] = instantiate_vlan, |
864 | [LXC_NET_PHYS] = instantiate_phys, | |
865 | [LXC_NET_EMPTY] = instantiate_empty, | |
866 | [LXC_NET_NONE] = instantiate_none, | |
867 | }; | |
868 | ||
8bf64b77 CB |
869 | static int instantiate_ns_veth(struct lxc_netdev *netdev) |
870 | { | |
871 | char current_ifname[IFNAMSIZ]; | |
872 | ||
873 | netdev->ifindex = if_nametoindex(netdev->created_name); | |
874 | if (!netdev->ifindex) | |
875 | return log_error_errno(-1, | |
876 | errno, "Failed to retrieve ifindex for network device with name %s", | |
877 | netdev->created_name); | |
878 | ||
3473ca76 | 879 | if (is_empty_string(netdev->name)) |
8bf64b77 CB |
880 | (void)strlcpy(netdev->name, "eth%d", IFNAMSIZ); |
881 | ||
882 | if (strcmp(netdev->created_name, netdev->name) != 0) { | |
883 | int ret; | |
884 | ||
885 | ret = lxc_netdev_rename_by_name(netdev->created_name, netdev->name); | |
886 | if (ret) | |
9c66dc4f | 887 | return log_error_errno(-1, -ret, "Failed to rename network device \"%s\" to \"%s\"", |
8bf64b77 CB |
888 | netdev->created_name, |
889 | netdev->name); | |
890 | ||
891 | TRACE("Renamed network device from \"%s\" to \"%s\"", netdev->created_name, netdev->name); | |
892 | } | |
893 | ||
894 | /* | |
895 | * Re-read the name of the interface because its name has changed and | |
896 | * would be automatically allocated by the system | |
897 | */ | |
898 | if (!if_indextoname(netdev->ifindex, current_ifname)) | |
9c66dc4f | 899 | return log_error_errno(-1, errno, "Failed get name for network device with ifindex %d", netdev->ifindex); |
8bf64b77 CB |
900 | |
901 | /* | |
902 | * Now update the recorded name of the network device to reflect the | |
903 | * name of the network device in the child's network namespace. We will | |
904 | * later on send this information back to the parent. | |
905 | */ | |
906 | (void)strlcpy(netdev->name, current_ifname, IFNAMSIZ); | |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
911 | static int __instantiate_common(struct lxc_netdev *netdev) | |
912 | { | |
913 | netdev->ifindex = if_nametoindex(netdev->name); | |
914 | if (!netdev->ifindex) | |
9c66dc4f | 915 | return log_error_errno(-1, errno, "Failed to retrieve ifindex for network device with name %s", netdev->name); |
8bf64b77 CB |
916 | |
917 | return 0; | |
918 | } | |
919 | ||
920 | static int instantiate_ns_macvlan(struct lxc_netdev *netdev) | |
921 | { | |
922 | return __instantiate_common(netdev); | |
923 | } | |
924 | ||
925 | static int instantiate_ns_ipvlan(struct lxc_netdev *netdev) | |
926 | { | |
927 | return __instantiate_common(netdev); | |
928 | } | |
929 | ||
930 | static int instantiate_ns_vlan(struct lxc_netdev *netdev) | |
931 | { | |
932 | return __instantiate_common(netdev); | |
933 | } | |
934 | ||
935 | static int instantiate_ns_phys(struct lxc_netdev *netdev) | |
936 | { | |
937 | return __instantiate_common(netdev); | |
938 | } | |
939 | ||
940 | static int instantiate_ns_empty(struct lxc_netdev *netdev) | |
941 | { | |
942 | return 0; | |
943 | } | |
944 | ||
945 | static int instantiate_ns_none(struct lxc_netdev *netdev) | |
946 | { | |
947 | return 0; | |
948 | } | |
949 | ||
950 | static instantiate_ns_cb netdev_ns_conf[LXC_NET_MAXCONFTYPE + 1] = { | |
951 | [LXC_NET_VETH] = instantiate_ns_veth, | |
952 | [LXC_NET_MACVLAN] = instantiate_ns_macvlan, | |
953 | [LXC_NET_IPVLAN] = instantiate_ns_ipvlan, | |
954 | [LXC_NET_VLAN] = instantiate_ns_vlan, | |
955 | [LXC_NET_PHYS] = instantiate_ns_phys, | |
956 | [LXC_NET_EMPTY] = instantiate_ns_empty, | |
957 | [LXC_NET_NONE] = instantiate_ns_none, | |
958 | }; | |
959 | ||
811ef482 CB |
960 | static int shutdown_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
961 | { | |
14a7b0f9 CB |
962 | int ret; |
963 | char *argv[] = { | |
964 | "veth", | |
965 | netdev->link, | |
966 | NULL, | |
967 | NULL, | |
968 | }; | |
969 | ||
970 | if (!netdev->downscript) | |
971 | return 0; | |
811ef482 | 972 | |
f2711167 | 973 | if (!is_empty_string(netdev->priv.veth_attr.pair)) |
14a7b0f9 | 974 | argv[2] = netdev->priv.veth_attr.pair; |
811ef482 | 975 | else |
14a7b0f9 CB |
976 | argv[2] = netdev->priv.veth_attr.veth1; |
977 | ||
978 | ret = run_script_argv(handler->name, | |
979 | handler->conf->hooks_version, "net", | |
980 | netdev->downscript, "down", argv); | |
981 | if (ret < 0) | |
982 | return -1; | |
811ef482 | 983 | |
811ef482 CB |
984 | return 0; |
985 | } | |
986 | ||
987 | static int shutdown_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
988 | { | |
14a7b0f9 CB |
989 | int ret; |
990 | char *argv[] = { | |
991 | "macvlan", | |
992 | netdev->link, | |
993 | NULL, | |
994 | }; | |
995 | ||
996 | if (!netdev->downscript) | |
997 | return 0; | |
998 | ||
999 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1000 | "net", netdev->downscript, "down", argv); | |
1001 | if (ret < 0) | |
1002 | return -1; | |
811ef482 | 1003 | |
811ef482 CB |
1004 | return 0; |
1005 | } | |
1006 | ||
c9f52382 | 1007 | static int shutdown_ipvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
1008 | { | |
1009 | int ret; | |
1010 | char *argv[] = { | |
1011 | "ipvlan", | |
1012 | netdev->link, | |
1013 | NULL, | |
1014 | }; | |
1015 | ||
1016 | if (!netdev->downscript) | |
1017 | return 0; | |
1018 | ||
1019 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1020 | "net", netdev->downscript, "down", argv); | |
1021 | if (ret < 0) | |
1022 | return -1; | |
1023 | ||
1024 | return 0; | |
1025 | } | |
1026 | ||
811ef482 CB |
1027 | static int shutdown_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
1028 | { | |
3a73d9f1 | 1029 | int ret; |
1030 | char *argv[] = { | |
1031 | "vlan", | |
1032 | netdev->link, | |
1033 | NULL, | |
1034 | }; | |
1035 | ||
1036 | if (!netdev->downscript) | |
1037 | return 0; | |
1038 | ||
1039 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1040 | "net", netdev->downscript, "down", argv); | |
1041 | if (ret < 0) | |
1042 | return -1; | |
1043 | ||
811ef482 CB |
1044 | return 0; |
1045 | } | |
1046 | ||
1047 | static int shutdown_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1048 | { | |
14a7b0f9 CB |
1049 | int ret; |
1050 | char *argv[] = { | |
1051 | "phys", | |
1052 | netdev->link, | |
1053 | NULL, | |
1054 | }; | |
1055 | ||
1056 | if (!netdev->downscript) | |
1057 | return 0; | |
1058 | ||
1059 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1060 | "net", netdev->downscript, "down", argv); | |
1061 | if (ret < 0) | |
1062 | return -1; | |
811ef482 | 1063 | |
811ef482 CB |
1064 | return 0; |
1065 | } | |
1066 | ||
1067 | static int shutdown_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1068 | { | |
14a7b0f9 CB |
1069 | int ret; |
1070 | char *argv[] = { | |
1071 | "empty", | |
1072 | NULL, | |
1073 | }; | |
1074 | ||
1075 | if (!netdev->downscript) | |
1076 | return 0; | |
1077 | ||
1078 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1079 | "net", netdev->downscript, "down", argv); | |
1080 | if (ret < 0) | |
1081 | return -1; | |
811ef482 | 1082 | |
811ef482 CB |
1083 | return 0; |
1084 | } | |
1085 | ||
1086 | static int shutdown_none(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1087 | { | |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | static instantiate_cb netdev_deconf[LXC_NET_MAXCONFTYPE + 1] = { | |
1092 | [LXC_NET_VETH] = shutdown_veth, | |
1093 | [LXC_NET_MACVLAN] = shutdown_macvlan, | |
c9f52382 | 1094 | [LXC_NET_IPVLAN] = shutdown_ipvlan, |
811ef482 CB |
1095 | [LXC_NET_VLAN] = shutdown_vlan, |
1096 | [LXC_NET_PHYS] = shutdown_phys, | |
1097 | [LXC_NET_EMPTY] = shutdown_empty, | |
1098 | [LXC_NET_NONE] = shutdown_none, | |
1099 | }; | |
1100 | ||
0037ab49 TP |
1101 | static int lxc_netdev_move_by_index_fd(int ifindex, int fd, const char *ifname) |
1102 | { | |
d16bda44 | 1103 | call_cleaner(nlmsg_free) struct nlmsg *nlmsg = NULL; |
0037ab49 | 1104 | struct nl_handler nlh; |
d16bda44 CB |
1105 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
1106 | int err; | |
0037ab49 | 1107 | struct ifinfomsg *ifi; |
0037ab49 | 1108 | |
d16bda44 | 1109 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
0037ab49 TP |
1110 | if (err) |
1111 | return err; | |
1112 | ||
0037ab49 TP |
1113 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1114 | if (!nlmsg) | |
d16bda44 | 1115 | return ret_errno(ENOMEM); |
0037ab49 TP |
1116 | |
1117 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
1118 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; | |
1119 | ||
1120 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
1121 | if (!ifi) | |
d16bda44 CB |
1122 | return ret_errno(ENOMEM); |
1123 | ||
0037ab49 TP |
1124 | ifi->ifi_family = AF_UNSPEC; |
1125 | ifi->ifi_index = ifindex; | |
1126 | ||
1127 | if (nla_put_u32(nlmsg, IFLA_NET_NS_FD, fd)) | |
d16bda44 | 1128 | return ret_errno(ENOMEM); |
0037ab49 | 1129 | |
3473ca76 | 1130 | if (!is_empty_string(ifname) && nla_put_string(nlmsg, IFLA_IFNAME, ifname)) |
d16bda44 | 1131 | return ret_errno(ENOMEM); |
0037ab49 | 1132 | |
d16bda44 | 1133 | return netlink_transaction(nlh_ptr, nlmsg, nlmsg); |
0037ab49 TP |
1134 | } |
1135 | ||
ebc73a67 | 1136 | int lxc_netdev_move_by_index(int ifindex, pid_t pid, const char *ifname) |
0ad19a3f | 1137 | { |
d16bda44 | 1138 | call_cleaner(nlmsg_free) struct nlmsg *nlmsg = NULL; |
0ad19a3f | 1139 | struct nl_handler nlh; |
d16bda44 CB |
1140 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
1141 | int err; | |
06f976ca | 1142 | struct ifinfomsg *ifi; |
0ad19a3f | 1143 | |
d16bda44 | 1144 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1145 | if (err) |
1146 | return err; | |
0ad19a3f | 1147 | |
0ad19a3f | 1148 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1149 | if (!nlmsg) | |
d16bda44 | 1150 | return ret_errno(ENOMEM); |
0ad19a3f | 1151 | |
ebc73a67 | 1152 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
1153 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1154 | ||
1155 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b | 1156 | if (!ifi) |
d16bda44 CB |
1157 | return ret_errno(ENOMEM); |
1158 | ||
06f976ca SZ |
1159 | ifi->ifi_family = AF_UNSPEC; |
1160 | ifi->ifi_index = ifindex; | |
0ad19a3f | 1161 | |
1162 | if (nla_put_u32(nlmsg, IFLA_NET_NS_PID, pid)) | |
d16bda44 | 1163 | return ret_errno(ENOMEM); |
0ad19a3f | 1164 | |
3473ca76 | 1165 | if (!is_empty_string(ifname) && nla_put_string(nlmsg, IFLA_IFNAME, ifname)) |
d16bda44 | 1166 | return ret_errno(ENOMEM); |
8d357196 | 1167 | |
d16bda44 | 1168 | return netlink_transaction(nlh_ptr, nlmsg, nlmsg); |
0ad19a3f | 1169 | } |
1170 | ||
ebc73a67 CB |
1171 | /* If we are asked to move a wireless interface, then we must actually move its |
1172 | * phyN device. Detect that condition and return the physname here. The physname | |
1173 | * will be passed to lxc_netdev_move_wlan() which will free it when done. | |
e5848d39 SH |
1174 | */ |
1175 | #define PHYSNAME "/sys/class/net/%s/phy80211/name" | |
e4103cf6 | 1176 | char *is_wlan(const char *ifname) |
e5848d39 | 1177 | { |
4110345b CB |
1178 | __do_fclose FILE *f = NULL; |
1179 | __do_free char *path = NULL, *physname = NULL; | |
ebc73a67 | 1180 | int i, ret; |
e5848d39 | 1181 | long physlen; |
ebc73a67 | 1182 | size_t len; |
e5848d39 | 1183 | |
ebc73a67 | 1184 | len = strlen(ifname) + strlen(PHYSNAME) - 1; |
95ea3d1f | 1185 | path = must_realloc(NULL, len + 1); |
e5848d39 | 1186 | ret = snprintf(path, len, PHYSNAME, ifname); |
ebc73a67 | 1187 | if (ret < 0 || (size_t)ret >= len) |
4110345b | 1188 | return NULL; |
ebc73a67 | 1189 | |
4110345b | 1190 | f = fopen(path, "re"); |
ebc73a67 | 1191 | if (!f) |
4110345b | 1192 | return NULL; |
ebc73a67 | 1193 | |
1a0e70ac | 1194 | /* Feh - sb.st_size is always 4096. */ |
e5848d39 SH |
1195 | fseek(f, 0, SEEK_END); |
1196 | physlen = ftell(f); | |
1197 | fseek(f, 0, SEEK_SET); | |
4110345b CB |
1198 | if (physlen < 0) |
1199 | return NULL; | |
ebc73a67 CB |
1200 | |
1201 | physname = malloc(physlen + 1); | |
4110345b CB |
1202 | if (!physname) |
1203 | return NULL; | |
ebc73a67 CB |
1204 | |
1205 | memset(physname, 0, physlen + 1); | |
e5848d39 | 1206 | ret = fread(physname, 1, physlen, f); |
e5848d39 | 1207 | if (ret < 0) |
4110345b | 1208 | return NULL; |
e5848d39 | 1209 | |
ebc73a67 | 1210 | for (i = 0; i < physlen; i++) { |
e5848d39 SH |
1211 | if (physname[i] == '\n') |
1212 | physname[i] = '\0'; | |
ebc73a67 | 1213 | |
e5848d39 SH |
1214 | if (physname[i] == '\0') |
1215 | break; | |
1216 | } | |
1217 | ||
4110345b | 1218 | return move_ptr(physname); |
e5848d39 SH |
1219 | } |
1220 | ||
ebc73a67 CB |
1221 | static int lxc_netdev_rename_by_name_in_netns(pid_t pid, const char *old, |
1222 | const char *new) | |
e5848d39 | 1223 | { |
ebc73a67 | 1224 | pid_t fpid; |
e5848d39 | 1225 | |
ebc73a67 | 1226 | fpid = fork(); |
e5848d39 SH |
1227 | if (fpid < 0) |
1228 | return -1; | |
ebc73a67 | 1229 | |
e5848d39 SH |
1230 | if (fpid != 0) |
1231 | return wait_for_pid(fpid); | |
ebc73a67 | 1232 | |
e5848d39 SH |
1233 | if (!switch_to_ns(pid, "net")) |
1234 | return -1; | |
ebc73a67 | 1235 | |
05ec44f8 | 1236 | _exit(lxc_netdev_rename_by_name(old, new)); |
e5848d39 SH |
1237 | } |
1238 | ||
e4103cf6 | 1239 | int lxc_netdev_move_wlan(char *physname, const char *ifname, pid_t pid, |
ebc73a67 | 1240 | const char *newname) |
e5848d39 | 1241 | { |
3dd78294 | 1242 | __do_free char *cmd = NULL; |
ebc73a67 | 1243 | pid_t fpid; |
e5848d39 SH |
1244 | |
1245 | /* Move phyN into the container. TODO - do this using netlink. | |
ebc73a67 CB |
1246 | * However, IIUC this involves a bit more complicated work to talk to |
1247 | * the 80211 module, so for now just call out to iw. | |
e5848d39 SH |
1248 | */ |
1249 | cmd = on_path("iw", NULL); | |
9c66dc4f | 1250 | if (!cmd) |
3dd78294 | 1251 | return -1; |
e5848d39 SH |
1252 | |
1253 | fpid = fork(); | |
1254 | if (fpid < 0) | |
3dd78294 | 1255 | return -1; |
ebc73a67 | 1256 | |
e5848d39 SH |
1257 | if (fpid == 0) { |
1258 | char pidstr[30]; | |
1259 | sprintf(pidstr, "%d", pid); | |
9c66dc4f | 1260 | execlp("iw", "iw", "phy", physname, "set", "netns", pidstr, (char *)NULL); |
ebd582ae | 1261 | _exit(EXIT_FAILURE); |
e5848d39 | 1262 | } |
ebc73a67 | 1263 | |
e5848d39 | 1264 | if (wait_for_pid(fpid)) |
3dd78294 | 1265 | return -1; |
e5848d39 | 1266 | |
e5848d39 | 1267 | if (newname) |
3dd78294 | 1268 | return lxc_netdev_rename_by_name_in_netns(pid, ifname, newname); |
e5848d39 | 1269 | |
3dd78294 | 1270 | return 0; |
e5848d39 SH |
1271 | } |
1272 | ||
8d357196 | 1273 | int lxc_netdev_move_by_name(const char *ifname, pid_t pid, const char* newname) |
8befa924 | 1274 | { |
3dd78294 | 1275 | __do_free char *physname = NULL; |
8befa924 SH |
1276 | int index; |
1277 | ||
8befa924 SH |
1278 | if (!ifname) |
1279 | return -EINVAL; | |
1280 | ||
32571606 | 1281 | index = if_nametoindex(ifname); |
49428bf3 DY |
1282 | if (!index) |
1283 | return -EINVAL; | |
32571606 | 1284 | |
ebc73a67 CB |
1285 | physname = is_wlan(ifname); |
1286 | if (physname) | |
e5848d39 SH |
1287 | return lxc_netdev_move_wlan(physname, ifname, pid, newname); |
1288 | ||
8d357196 | 1289 | return lxc_netdev_move_by_index(index, pid, newname); |
8befa924 SH |
1290 | } |
1291 | ||
b84f58b9 | 1292 | int lxc_netdev_delete_by_index(int ifindex) |
0ad19a3f | 1293 | { |
d16bda44 CB |
1294 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1295 | struct nl_handler nlh; | |
1296 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
b84f58b9 | 1297 | int err; |
ebc73a67 | 1298 | struct ifinfomsg *ifi; |
0ad19a3f | 1299 | |
d16bda44 | 1300 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1301 | if (err) |
1302 | return err; | |
0ad19a3f | 1303 | |
0ad19a3f | 1304 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1305 | if (!nlmsg) | |
d16bda44 | 1306 | return ret_errno(ENOMEM); |
0ad19a3f | 1307 | |
06f976ca | 1308 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1309 | if (!answer) |
d16bda44 | 1310 | return ret_errno(ENOMEM); |
0ad19a3f | 1311 | |
ebc73a67 | 1312 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST; |
06f976ca SZ |
1313 | nlmsg->nlmsghdr->nlmsg_type = RTM_DELLINK; |
1314 | ||
1315 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b | 1316 | if (!ifi) |
d16bda44 CB |
1317 | return ret_errno(ENOMEM); |
1318 | ||
06f976ca SZ |
1319 | ifi->ifi_family = AF_UNSPEC; |
1320 | ifi->ifi_index = ifindex; | |
0ad19a3f | 1321 | |
d16bda44 | 1322 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 1323 | } |
1324 | ||
b84f58b9 DL |
1325 | int lxc_netdev_delete_by_name(const char *name) |
1326 | { | |
1327 | int index; | |
1328 | ||
1329 | index = if_nametoindex(name); | |
1330 | if (!index) | |
1331 | return -EINVAL; | |
1332 | ||
1333 | return lxc_netdev_delete_by_index(index); | |
1334 | } | |
1335 | ||
1336 | int lxc_netdev_rename_by_index(int ifindex, const char *newname) | |
b9a5bb58 | 1337 | { |
d16bda44 CB |
1338 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1339 | struct nl_handler nlh; | |
1340 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1341 | int err, len; |
06f976ca | 1342 | struct ifinfomsg *ifi; |
b9a5bb58 | 1343 | |
d16bda44 | 1344 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1345 | if (err) |
1346 | return err; | |
b9a5bb58 | 1347 | |
b84f58b9 | 1348 | len = strlen(newname); |
d16bda44 CB |
1349 | if (len == 1 || len >= IFNAMSIZ) |
1350 | return ret_errno(EINVAL); | |
b84f58b9 | 1351 | |
b9a5bb58 DL |
1352 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1353 | if (!nlmsg) | |
d16bda44 | 1354 | return ret_errno(ENOMEM); |
b9a5bb58 | 1355 | |
06f976ca | 1356 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
b9a5bb58 | 1357 | if (!answer) |
d16bda44 | 1358 | return ret_errno(ENOMEM); |
b9a5bb58 | 1359 | |
ebc73a67 | 1360 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST; |
06f976ca SZ |
1361 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1362 | ||
1363 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b | 1364 | if (!ifi) |
d16bda44 CB |
1365 | return ret_errno(ENOMEM); |
1366 | ||
06f976ca SZ |
1367 | ifi->ifi_family = AF_UNSPEC; |
1368 | ifi->ifi_index = ifindex; | |
b84f58b9 DL |
1369 | |
1370 | if (nla_put_string(nlmsg, IFLA_IFNAME, newname)) | |
d16bda44 | 1371 | return ret_errno(ENOMEM); |
b9a5bb58 | 1372 | |
d16bda44 | 1373 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
b9a5bb58 DL |
1374 | } |
1375 | ||
b84f58b9 DL |
1376 | int lxc_netdev_rename_by_name(const char *oldname, const char *newname) |
1377 | { | |
1378 | int len, index; | |
1379 | ||
1380 | len = strlen(oldname); | |
dae3fdf6 | 1381 | if (len == 1 || len >= IFNAMSIZ) |
b84f58b9 DL |
1382 | return -EINVAL; |
1383 | ||
1384 | index = if_nametoindex(oldname); | |
1385 | if (!index) | |
1386 | return -EINVAL; | |
1387 | ||
1388 | return lxc_netdev_rename_by_index(index, newname); | |
1389 | } | |
1390 | ||
8befa924 | 1391 | int netdev_set_flag(const char *name, int flag) |
0ad19a3f | 1392 | { |
d16bda44 CB |
1393 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1394 | struct nl_handler nlh; | |
1395 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1396 | int err, index, len; |
06f976ca | 1397 | struct ifinfomsg *ifi; |
0ad19a3f | 1398 | |
d16bda44 | 1399 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1400 | if (err) |
1401 | return err; | |
0ad19a3f | 1402 | |
1403 | len = strlen(name); | |
dae3fdf6 | 1404 | if (len == 1 || len >= IFNAMSIZ) |
d16bda44 | 1405 | return ret_errno(EINVAL); |
0ad19a3f | 1406 | |
1407 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1408 | if (!nlmsg) | |
d16bda44 | 1409 | return ret_errno(ENOMEM); |
0ad19a3f | 1410 | |
06f976ca | 1411 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1412 | if (!answer) |
d16bda44 | 1413 | return ret_errno(ENOMEM); |
0ad19a3f | 1414 | |
1415 | index = if_nametoindex(name); | |
1416 | if (!index) | |
d16bda44 | 1417 | return ret_errno(EINVAL); |
0ad19a3f | 1418 | |
ebc73a67 | 1419 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
1420 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1421 | ||
1422 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
d16bda44 CB |
1423 | if (!ifi) |
1424 | return ret_errno(ENOMEM); | |
1425 | ||
06f976ca SZ |
1426 | ifi->ifi_family = AF_UNSPEC; |
1427 | ifi->ifi_index = index; | |
1428 | ifi->ifi_change |= IFF_UP; | |
1429 | ifi->ifi_flags |= flag; | |
0ad19a3f | 1430 | |
d16bda44 | 1431 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 1432 | } |
1433 | ||
ebc73a67 | 1434 | int netdev_get_flag(const char *name, int *flag) |
efa1cf45 | 1435 | { |
d16bda44 CB |
1436 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1437 | struct nl_handler nlh; | |
1438 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1439 | int err, index, len; |
a4318300 | 1440 | struct ifinfomsg *ifi; |
efa1cf45 DY |
1441 | |
1442 | if (!name) | |
d16bda44 | 1443 | return ret_errno(EINVAL); |
efa1cf45 | 1444 | |
d16bda44 | 1445 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
efa1cf45 DY |
1446 | if (err) |
1447 | return err; | |
1448 | ||
efa1cf45 DY |
1449 | len = strlen(name); |
1450 | if (len == 1 || len >= IFNAMSIZ) | |
d16bda44 | 1451 | return ret_errno(EINVAL); |
efa1cf45 | 1452 | |
efa1cf45 DY |
1453 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1454 | if (!nlmsg) | |
d16bda44 | 1455 | return ret_errno(ENOMEM); |
efa1cf45 | 1456 | |
06f976ca | 1457 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
efa1cf45 | 1458 | if (!answer) |
d16bda44 | 1459 | return ret_errno(ENOMEM); |
efa1cf45 | 1460 | |
efa1cf45 DY |
1461 | index = if_nametoindex(name); |
1462 | if (!index) | |
d16bda44 | 1463 | return ret_errno(EINVAL); |
efa1cf45 | 1464 | |
06f976ca SZ |
1465 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST; |
1466 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETLINK; | |
1467 | ||
1468 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
d16bda44 CB |
1469 | if (!ifi) |
1470 | return ret_errno(ENOMEM); | |
1471 | ||
06f976ca SZ |
1472 | ifi->ifi_family = AF_UNSPEC; |
1473 | ifi->ifi_index = index; | |
efa1cf45 | 1474 | |
d16bda44 | 1475 | err = netlink_transaction(nlh_ptr, nlmsg, answer); |
efa1cf45 | 1476 | if (err) |
d16bda44 | 1477 | return ret_set_errno(-1, errno); |
efa1cf45 | 1478 | |
06f976ca | 1479 | ifi = NLMSG_DATA(answer->nlmsghdr); |
efa1cf45 DY |
1480 | |
1481 | *flag = ifi->ifi_flags; | |
efa1cf45 DY |
1482 | return err; |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * \brief Check a interface is up or not. | |
1487 | * | |
1488 | * \param name: name for the interface. | |
1489 | * | |
1490 | * \return int. | |
1491 | * 0 means interface is down. | |
1492 | * 1 means interface is up. | |
1493 | * Others means error happened, and ret-value is the error number. | |
1494 | */ | |
ebc73a67 | 1495 | int lxc_netdev_isup(const char *name) |
efa1cf45 | 1496 | { |
ebc73a67 | 1497 | int err, flag; |
efa1cf45 DY |
1498 | |
1499 | err = netdev_get_flag(name, &flag); | |
1500 | if (err) | |
ebc73a67 CB |
1501 | return err; |
1502 | ||
efa1cf45 DY |
1503 | if (flag & IFF_UP) |
1504 | return 1; | |
ebc73a67 | 1505 | |
efa1cf45 | 1506 | return 0; |
efa1cf45 DY |
1507 | } |
1508 | ||
0130df54 SH |
1509 | int netdev_get_mtu(int ifindex) |
1510 | { | |
a5f5cb41 | 1511 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
0130df54 | 1512 | struct nl_handler nlh; |
a5f5cb41 CB |
1513 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
1514 | int readmore = 0, recv_len = 0; | |
1515 | int answer_len, err, res; | |
06f976ca | 1516 | struct ifinfomsg *ifi; |
0130df54 | 1517 | struct nlmsghdr *msg; |
0130df54 | 1518 | |
a5f5cb41 | 1519 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
0130df54 SH |
1520 | if (err) |
1521 | return err; | |
1522 | ||
0130df54 SH |
1523 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1524 | if (!nlmsg) | |
a5f5cb41 | 1525 | return ret_errno(ENOMEM); |
0130df54 | 1526 | |
06f976ca | 1527 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0130df54 | 1528 | if (!answer) |
a5f5cb41 | 1529 | return ret_errno(ENOMEM); |
0130df54 SH |
1530 | |
1531 | /* Save the answer buffer length, since it will be overwritten | |
1532 | * on the first receive (and we might need to receive more than | |
ebc73a67 CB |
1533 | * once. |
1534 | */ | |
06f976ca SZ |
1535 | answer_len = answer->nlmsghdr->nlmsg_len; |
1536 | ||
ebc73a67 | 1537 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; |
06f976ca | 1538 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETLINK; |
0130df54 | 1539 | |
06f976ca | 1540 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); |
25a9939b | 1541 | if (!ifi) |
a5f5cb41 CB |
1542 | return ret_errno(ENOMEM); |
1543 | ||
06f976ca | 1544 | ifi->ifi_family = AF_UNSPEC; |
0130df54 SH |
1545 | |
1546 | /* Send the request for addresses, which returns all addresses | |
1547 | * on all interfaces. */ | |
a5f5cb41 | 1548 | err = netlink_send(nlh_ptr, nlmsg); |
0130df54 | 1549 | if (err < 0) |
a5f5cb41 | 1550 | return ret_set_errno(-1, errno); |
0130df54 | 1551 | |
6ce39620 CB |
1552 | #pragma GCC diagnostic push |
1553 | #pragma GCC diagnostic ignored "-Wcast-align" | |
1554 | ||
0130df54 SH |
1555 | do { |
1556 | /* Restore the answer buffer length, it might have been | |
ebc73a67 CB |
1557 | * overwritten by a previous receive. |
1558 | */ | |
06f976ca | 1559 | answer->nlmsghdr->nlmsg_len = answer_len; |
0130df54 SH |
1560 | |
1561 | /* Get the (next) batch of reply messages */ | |
a5f5cb41 | 1562 | err = netlink_rcv(nlh_ptr, answer); |
0130df54 | 1563 | if (err < 0) |
a5f5cb41 | 1564 | return ret_set_errno(-1, errno); |
0130df54 SH |
1565 | |
1566 | recv_len = err; | |
0130df54 SH |
1567 | |
1568 | /* Satisfy the typing for the netlink macros */ | |
06f976ca | 1569 | msg = answer->nlmsghdr; |
0130df54 SH |
1570 | |
1571 | while (NLMSG_OK(msg, recv_len)) { | |
0130df54 SH |
1572 | /* Stop reading if we see an error message */ |
1573 | if (msg->nlmsg_type == NLMSG_ERROR) { | |
a5f5cb41 CB |
1574 | struct nlmsgerr *errmsg = (struct nlmsgerr *)NLMSG_DATA(msg); |
1575 | return ret_set_errno(errmsg->error, errno); | |
0130df54 SH |
1576 | } |
1577 | ||
1578 | /* Stop reading if we see a NLMSG_DONE message */ | |
1579 | if (msg->nlmsg_type == NLMSG_DONE) { | |
1580 | readmore = 0; | |
1581 | break; | |
1582 | } | |
1583 | ||
06f976ca | 1584 | ifi = NLMSG_DATA(msg); |
0130df54 SH |
1585 | if (ifi->ifi_index == ifindex) { |
1586 | struct rtattr *rta = IFLA_RTA(ifi); | |
a5f5cb41 CB |
1587 | int attr_len = msg->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)); |
1588 | ||
0130df54 | 1589 | res = 0; |
ebc73a67 | 1590 | while (RTA_OK(rta, attr_len)) { |
9c66dc4f | 1591 | /* |
a5f5cb41 | 1592 | * Found a local address for the |
ebc73a67 CB |
1593 | * requested interface, return it. |
1594 | */ | |
0130df54 | 1595 | if (rta->rta_type == IFLA_MTU) { |
a5f5cb41 CB |
1596 | memcpy(&res, RTA_DATA(rta), sizeof(int)); |
1597 | return res; | |
0130df54 | 1598 | } |
a5f5cb41 | 1599 | |
0130df54 SH |
1600 | rta = RTA_NEXT(rta, attr_len); |
1601 | } | |
0130df54 SH |
1602 | } |
1603 | ||
ebc73a67 CB |
1604 | /* Keep reading more data from the socket if the last |
1605 | * message had the NLF_F_MULTI flag set. | |
1606 | */ | |
0130df54 SH |
1607 | readmore = (msg->nlmsg_flags & NLM_F_MULTI); |
1608 | ||
ebc73a67 | 1609 | /* Look at the next message received in this buffer. */ |
0130df54 SH |
1610 | msg = NLMSG_NEXT(msg, recv_len); |
1611 | } | |
1612 | } while (readmore); | |
1613 | ||
6ce39620 CB |
1614 | #pragma GCC diagnostic pop |
1615 | ||
ebc73a67 | 1616 | /* If we end up here, we didn't find any result, so signal an error. */ |
a5f5cb41 | 1617 | return -1; |
0130df54 SH |
1618 | } |
1619 | ||
d472214b | 1620 | int lxc_netdev_set_mtu(const char *name, int mtu) |
75d09f83 | 1621 | { |
a5f5cb41 CB |
1622 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1623 | struct nl_handler nlh; | |
1624 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
54256301 | 1625 | int err, len; |
06f976ca | 1626 | struct ifinfomsg *ifi; |
75d09f83 | 1627 | |
a5f5cb41 | 1628 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1629 | if (err) |
1630 | return err; | |
75d09f83 DL |
1631 | |
1632 | len = strlen(name); | |
dae3fdf6 | 1633 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1634 | return ret_errno(EINVAL); |
75d09f83 DL |
1635 | |
1636 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1637 | if (!nlmsg) | |
a5f5cb41 | 1638 | return ret_errno(ENOMEM); |
75d09f83 | 1639 | |
06f976ca | 1640 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
75d09f83 | 1641 | if (!answer) |
a5f5cb41 | 1642 | return ret_errno(ENOMEM); |
75d09f83 | 1643 | |
ebc73a67 | 1644 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
1645 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1646 | ||
1647 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
a5f5cb41 CB |
1648 | if (!ifi) |
1649 | return ret_errno(ENOMEM); | |
1650 | ||
06f976ca | 1651 | ifi->ifi_family = AF_UNSPEC; |
54256301 CB |
1652 | |
1653 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
a5f5cb41 | 1654 | return ret_errno(ENOMEM); |
75d09f83 DL |
1655 | |
1656 | if (nla_put_u32(nlmsg, IFLA_MTU, mtu)) | |
a5f5cb41 | 1657 | return ret_errno(ENOMEM); |
75d09f83 | 1658 | |
a5f5cb41 | 1659 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
75d09f83 DL |
1660 | } |
1661 | ||
d472214b | 1662 | int lxc_netdev_up(const char *name) |
0ad19a3f | 1663 | { |
d472214b | 1664 | return netdev_set_flag(name, IFF_UP); |
0ad19a3f | 1665 | } |
1666 | ||
d472214b | 1667 | int lxc_netdev_down(const char *name) |
0ad19a3f | 1668 | { |
d472214b | 1669 | return netdev_set_flag(name, 0); |
0ad19a3f | 1670 | } |
1671 | ||
54256301 | 1672 | int lxc_veth_create(const char *name1, const char *name2, pid_t pid, unsigned int mtu) |
0ad19a3f | 1673 | { |
a5f5cb41 CB |
1674 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1675 | struct nl_handler nlh; | |
1676 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1677 | int err, len; |
06f976ca | 1678 | struct ifinfomsg *ifi; |
0ad19a3f | 1679 | struct rtattr *nest1, *nest2, *nest3; |
0ad19a3f | 1680 | |
a5f5cb41 | 1681 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1682 | if (err) |
1683 | return err; | |
0ad19a3f | 1684 | |
1685 | len = strlen(name1); | |
dae3fdf6 | 1686 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1687 | return ret_errno(EINVAL); |
0ad19a3f | 1688 | |
1689 | len = strlen(name2); | |
dae3fdf6 | 1690 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1691 | return ret_errno(EINVAL); |
0ad19a3f | 1692 | |
1693 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1694 | if (!nlmsg) | |
a5f5cb41 | 1695 | return ret_errno(ENOMEM); |
0ad19a3f | 1696 | |
06f976ca | 1697 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1698 | if (!answer) |
a5f5cb41 | 1699 | return ret_errno(ENOMEM); |
0ad19a3f | 1700 | |
a5f5cb41 | 1701 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
1702 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1703 | ||
1704 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b | 1705 | if (!ifi) |
a5f5cb41 CB |
1706 | return ret_errno(ENOMEM); |
1707 | ||
06f976ca | 1708 | ifi->ifi_family = AF_UNSPEC; |
0ad19a3f | 1709 | |
79e68309 | 1710 | nest1 = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
0ad19a3f | 1711 | if (!nest1) |
a5f5cb41 | 1712 | return ret_errno(EINVAL); |
0ad19a3f | 1713 | |
1714 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "veth")) | |
a5f5cb41 | 1715 | return ret_errno(ENOMEM); |
0ad19a3f | 1716 | |
1717 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
1718 | if (!nest2) | |
a5f5cb41 | 1719 | return ret_errno(ENOMEM); |
0ad19a3f | 1720 | |
1721 | nest3 = nla_begin_nested(nlmsg, VETH_INFO_PEER); | |
1722 | if (!nest3) | |
a5f5cb41 | 1723 | return ret_errno(ENOMEM); |
0ad19a3f | 1724 | |
06f976ca | 1725 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); |
a5f5cb41 CB |
1726 | if (!ifi) |
1727 | return ret_errno(ENOMEM); | |
0ad19a3f | 1728 | |
1729 | if (nla_put_string(nlmsg, IFLA_IFNAME, name2)) | |
a5f5cb41 | 1730 | return ret_errno(ENOMEM); |
0ad19a3f | 1731 | |
54256301 | 1732 | if (mtu > 0 && nla_put_u32(nlmsg, IFLA_MTU, mtu)) |
a5f5cb41 | 1733 | return ret_errno(ENOMEM); |
54256301 CB |
1734 | |
1735 | if (pid > 0 && nla_put_u32(nlmsg, IFLA_NET_NS_PID, pid)) | |
a5f5cb41 | 1736 | return ret_errno(ENOMEM); |
54256301 | 1737 | |
0ad19a3f | 1738 | nla_end_nested(nlmsg, nest3); |
0ad19a3f | 1739 | nla_end_nested(nlmsg, nest2); |
0ad19a3f | 1740 | nla_end_nested(nlmsg, nest1); |
1741 | ||
1742 | if (nla_put_string(nlmsg, IFLA_IFNAME, name1)) | |
a5f5cb41 | 1743 | return ret_errno(ENOMEM); |
0ad19a3f | 1744 | |
a5f5cb41 | 1745 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 1746 | } |
1747 | ||
ebc73a67 | 1748 | /* TODO: merge with lxc_macvlan_create */ |
7c11d57a | 1749 | int lxc_vlan_create(const char *master, const char *name, unsigned short vlanid) |
26c39028 | 1750 | { |
a5f5cb41 CB |
1751 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1752 | struct nl_handler nlh; | |
1753 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1754 | int err, len, lindex; |
06f976ca | 1755 | struct ifinfomsg *ifi; |
26c39028 | 1756 | struct rtattr *nest, *nest2; |
26c39028 | 1757 | |
a5f5cb41 | 1758 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1759 | if (err) |
1760 | return err; | |
26c39028 JHS |
1761 | |
1762 | len = strlen(master); | |
dae3fdf6 | 1763 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1764 | return ret_errno(EINVAL); |
26c39028 JHS |
1765 | |
1766 | len = strlen(name); | |
dae3fdf6 | 1767 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1768 | return ret_errno(EINVAL); |
26c39028 JHS |
1769 | |
1770 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1771 | if (!nlmsg) | |
a5f5cb41 | 1772 | return ret_errno(ENOMEM); |
26c39028 | 1773 | |
06f976ca | 1774 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
26c39028 | 1775 | if (!answer) |
a5f5cb41 | 1776 | return ret_errno(ENOMEM); |
26c39028 JHS |
1777 | |
1778 | lindex = if_nametoindex(master); | |
1779 | if (!lindex) | |
a5f5cb41 | 1780 | return ret_errno(EINVAL); |
26c39028 | 1781 | |
a5f5cb41 | 1782 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
1783 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1784 | ||
1785 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
a5f5cb41 CB |
1786 | if (!ifi) |
1787 | return ret_errno(ENOMEM); | |
1788 | ||
06f976ca | 1789 | ifi->ifi_family = AF_UNSPEC; |
26c39028 | 1790 | |
79e68309 | 1791 | nest = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
26c39028 | 1792 | if (!nest) |
a5f5cb41 | 1793 | return ret_errno(ENOMEM); |
26c39028 JHS |
1794 | |
1795 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "vlan")) | |
a5f5cb41 | 1796 | return ret_errno(ENOMEM); |
26c39028 JHS |
1797 | |
1798 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
1799 | if (!nest2) | |
a5f5cb41 | 1800 | return ret_errno(ENOMEM); |
e892973e | 1801 | |
26c39028 | 1802 | if (nla_put_u16(nlmsg, IFLA_VLAN_ID, vlanid)) |
a5f5cb41 | 1803 | return ret_errno(ENOMEM); |
e892973e | 1804 | |
26c39028 | 1805 | nla_end_nested(nlmsg, nest2); |
26c39028 JHS |
1806 | nla_end_nested(nlmsg, nest); |
1807 | ||
1808 | if (nla_put_u32(nlmsg, IFLA_LINK, lindex)) | |
a5f5cb41 | 1809 | return ret_errno(ENOMEM); |
26c39028 JHS |
1810 | |
1811 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
a5f5cb41 CB |
1812 | return ret_errno(ENOMEM); |
1813 | ||
1814 | return netlink_transaction(nlh_ptr, nlmsg, answer); | |
26c39028 JHS |
1815 | } |
1816 | ||
e892973e | 1817 | int lxc_macvlan_create(const char *master, const char *name, int mode) |
0ad19a3f | 1818 | { |
a5f5cb41 CB |
1819 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1820 | struct nl_handler nlh; | |
1821 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1822 | int err, index, len; |
06f976ca | 1823 | struct ifinfomsg *ifi; |
e892973e | 1824 | struct rtattr *nest, *nest2; |
0ad19a3f | 1825 | |
a5f5cb41 | 1826 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1827 | if (err) |
1828 | return err; | |
0ad19a3f | 1829 | |
1830 | len = strlen(master); | |
dae3fdf6 | 1831 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1832 | return ret_errno(EINVAL); |
0ad19a3f | 1833 | |
1834 | len = strlen(name); | |
dae3fdf6 | 1835 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1836 | return ret_errno(EINVAL); |
0ad19a3f | 1837 | |
1838 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1839 | if (!nlmsg) | |
a5f5cb41 | 1840 | return ret_errno(ENOMEM); |
0ad19a3f | 1841 | |
06f976ca | 1842 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1843 | if (!answer) |
a5f5cb41 | 1844 | return ret_errno(ENOMEM); |
0ad19a3f | 1845 | |
1846 | index = if_nametoindex(master); | |
1847 | if (!index) | |
a5f5cb41 | 1848 | return ret_errno(EINVAL); |
0ad19a3f | 1849 | |
a5f5cb41 | 1850 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
1851 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1852 | ||
1853 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
a5f5cb41 CB |
1854 | if (!ifi) |
1855 | return ret_errno(ENOMEM); | |
1856 | ||
06f976ca | 1857 | ifi->ifi_family = AF_UNSPEC; |
0ad19a3f | 1858 | |
79e68309 | 1859 | nest = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
0ad19a3f | 1860 | if (!nest) |
a5f5cb41 | 1861 | return ret_errno(ENOMEM); |
0ad19a3f | 1862 | |
1863 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "macvlan")) | |
a5f5cb41 | 1864 | return ret_errno(ENOMEM); |
0ad19a3f | 1865 | |
e892973e DL |
1866 | if (mode) { |
1867 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
1868 | if (!nest2) | |
a5f5cb41 | 1869 | return ret_errno(ENOMEM); |
e892973e DL |
1870 | |
1871 | if (nla_put_u32(nlmsg, IFLA_MACVLAN_MODE, mode)) | |
a5f5cb41 | 1872 | return ret_errno(ENOMEM); |
e892973e DL |
1873 | |
1874 | nla_end_nested(nlmsg, nest2); | |
1875 | } | |
1876 | ||
0ad19a3f | 1877 | nla_end_nested(nlmsg, nest); |
1878 | ||
1879 | if (nla_put_u32(nlmsg, IFLA_LINK, index)) | |
a5f5cb41 | 1880 | return ret_errno(ENOMEM); |
0ad19a3f | 1881 | |
1882 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
a5f5cb41 | 1883 | return ret_errno(ENOMEM); |
0ad19a3f | 1884 | |
a5f5cb41 | 1885 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 1886 | } |
1887 | ||
1888 | static int proc_sys_net_write(const char *path, const char *value) | |
1889 | { | |
ebc73a67 CB |
1890 | int fd; |
1891 | int err = 0; | |
0ad19a3f | 1892 | |
1893 | fd = open(path, O_WRONLY); | |
1894 | if (fd < 0) | |
1895 | return -errno; | |
1896 | ||
f640cf46 | 1897 | if (lxc_write_nointr(fd, value, strlen(value)) < 0) |
0ad19a3f | 1898 | err = -errno; |
1899 | ||
1900 | close(fd); | |
1901 | return err; | |
1902 | } | |
1903 | ||
6dfa9581 | 1904 | static int ip_forwarding_set(const char *ifname, int family, int flag) |
6509154d | 1905 | { |
1906 | int ret; | |
1907 | char path[PATH_MAX]; | |
6509154d | 1908 | |
1909 | if (family != AF_INET && family != AF_INET6) | |
6dfa9581 | 1910 | return -EINVAL; |
6509154d | 1911 | |
9c66dc4f | 1912 | ret = snprintf(path, sizeof(path), "/proc/sys/net/%s/conf/%s/%s", |
6dfa9581 | 1913 | family == AF_INET ? "ipv4" : "ipv6", ifname, "forwarding"); |
9c66dc4f | 1914 | if (ret < 0 || (size_t)ret >= sizeof(path)) |
6dfa9581 | 1915 | return -E2BIG; |
6509154d | 1916 | |
6dfa9581 TP |
1917 | return proc_sys_net_write(path, flag ? "1" : "0"); |
1918 | } | |
1919 | ||
1920 | int lxc_ip_forwarding_on(const char *name, int family) | |
1921 | { | |
1922 | return ip_forwarding_set(name, family, 1); | |
1923 | } | |
1924 | ||
1925 | int lxc_ip_forwarding_off(const char *name, int family) | |
1926 | { | |
1927 | return ip_forwarding_set(name, family, 0); | |
6509154d | 1928 | } |
1929 | ||
0ad19a3f | 1930 | static int neigh_proxy_set(const char *ifname, int family, int flag) |
1931 | { | |
9ba8130c | 1932 | int ret; |
419590da | 1933 | char path[PATH_MAX]; |
0ad19a3f | 1934 | |
1935 | if (family != AF_INET && family != AF_INET6) | |
3cfc0f3a | 1936 | return -EINVAL; |
0ad19a3f | 1937 | |
9c66dc4f | 1938 | ret = snprintf(path, sizeof(path), "/proc/sys/net/%s/conf/%s/%s", |
ebc73a67 CB |
1939 | family == AF_INET ? "ipv4" : "ipv6", ifname, |
1940 | family == AF_INET ? "proxy_arp" : "proxy_ndp"); | |
9c66dc4f | 1941 | if (ret < 0 || (size_t)ret >= sizeof(path)) |
9ba8130c | 1942 | return -E2BIG; |
0ad19a3f | 1943 | |
ebc73a67 | 1944 | return proc_sys_net_write(path, flag ? "1" : "0"); |
0ad19a3f | 1945 | } |
1946 | ||
6509154d | 1947 | static int lxc_is_ip_neigh_proxy_enabled(const char *ifname, int family) |
1948 | { | |
1949 | int ret; | |
1950 | char path[PATH_MAX]; | |
1951 | char buf[1] = ""; | |
1952 | ||
1953 | if (family != AF_INET && family != AF_INET6) | |
596a002c | 1954 | return ret_set_errno(-1, EINVAL); |
6509154d | 1955 | |
9c66dc4f | 1956 | ret = snprintf(path, sizeof(path), "/proc/sys/net/%s/conf/%s/%s", |
6509154d | 1957 | family == AF_INET ? "ipv4" : "ipv6", ifname, |
1958 | family == AF_INET ? "proxy_arp" : "proxy_ndp"); | |
9c66dc4f | 1959 | if (ret < 0 || (size_t)ret >= sizeof(path)) |
596a002c | 1960 | return ret_set_errno(-1, E2BIG); |
6509154d | 1961 | |
1962 | return lxc_read_file_expect(path, buf, 1, "1"); | |
1963 | } | |
1964 | ||
497353b6 | 1965 | int lxc_neigh_proxy_on(const char *name, int family) |
0ad19a3f | 1966 | { |
1967 | return neigh_proxy_set(name, family, 1); | |
1968 | } | |
1969 | ||
497353b6 | 1970 | int lxc_neigh_proxy_off(const char *name, int family) |
0ad19a3f | 1971 | { |
1972 | return neigh_proxy_set(name, family, 0); | |
1973 | } | |
1974 | ||
1975 | int lxc_convert_mac(char *macaddr, struct sockaddr *sockaddr) | |
1976 | { | |
1f1b18e7 DL |
1977 | int i = 0; |
1978 | unsigned val; | |
ebc73a67 CB |
1979 | char c; |
1980 | unsigned char *data; | |
1f1b18e7 DL |
1981 | |
1982 | sockaddr->sa_family = ARPHRD_ETHER; | |
1983 | data = (unsigned char *)sockaddr->sa_data; | |
1984 | ||
1985 | while ((*macaddr != '\0') && (i < ETH_ALEN)) { | |
ebc73a67 CB |
1986 | c = *macaddr++; |
1987 | if (isdigit(c)) | |
1988 | val = c - '0'; | |
1989 | else if (c >= 'a' && c <= 'f') | |
1990 | val = c - 'a' + 10; | |
1991 | else if (c >= 'A' && c <= 'F') | |
1992 | val = c - 'A' + 10; | |
1993 | else | |
1994 | return -EINVAL; | |
1995 | ||
1996 | val <<= 4; | |
1997 | c = *macaddr; | |
1998 | if (isdigit(c)) | |
1999 | val |= c - '0'; | |
2000 | else if (c >= 'a' && c <= 'f') | |
2001 | val |= c - 'a' + 10; | |
2002 | else if (c >= 'A' && c <= 'F') | |
2003 | val |= c - 'A' + 10; | |
2004 | else if (c == ':' || c == 0) | |
2005 | val >>= 4; | |
2006 | else | |
2007 | return -EINVAL; | |
2008 | if (c != 0) | |
2009 | macaddr++; | |
2010 | *data++ = (unsigned char)(val & 0377); | |
2011 | i++; | |
2012 | ||
2013 | if (*macaddr == ':') | |
2014 | macaddr++; | |
0ad19a3f | 2015 | } |
0ad19a3f | 2016 | |
1f1b18e7 | 2017 | return 0; |
0ad19a3f | 2018 | } |
2019 | ||
ebc73a67 CB |
2020 | static int ip_addr_add(int family, int ifindex, void *addr, void *bcast, |
2021 | void *acast, int prefix) | |
0ad19a3f | 2022 | { |
a5f5cb41 CB |
2023 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
2024 | struct nl_handler nlh; | |
2025 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 2026 | int addrlen, err; |
06f976ca | 2027 | struct ifaddrmsg *ifa; |
0ad19a3f | 2028 | |
ebc73a67 CB |
2029 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
2030 | : sizeof(struct in6_addr); | |
4bf1968d | 2031 | |
a5f5cb41 | 2032 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
2033 | if (err) |
2034 | return err; | |
0ad19a3f | 2035 | |
0ad19a3f | 2036 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
2037 | if (!nlmsg) | |
a5f5cb41 | 2038 | return ret_errno(ENOMEM); |
0ad19a3f | 2039 | |
06f976ca | 2040 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 2041 | if (!answer) |
a5f5cb41 | 2042 | return ret_errno(ENOMEM); |
0ad19a3f | 2043 | |
a5f5cb41 | 2044 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
06f976ca SZ |
2045 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWADDR; |
2046 | ||
2047 | ifa = nlmsg_reserve(nlmsg, sizeof(struct ifaddrmsg)); | |
acf47e1b | 2048 | if (!ifa) |
a5f5cb41 CB |
2049 | return ret_errno(ENOMEM); |
2050 | ||
06f976ca SZ |
2051 | ifa->ifa_prefixlen = prefix; |
2052 | ifa->ifa_index = ifindex; | |
2053 | ifa->ifa_family = family; | |
2054 | ifa->ifa_scope = 0; | |
acf47e1b | 2055 | |
4bf1968d | 2056 | if (nla_put_buffer(nlmsg, IFA_LOCAL, addr, addrlen)) |
a5f5cb41 | 2057 | return ret_errno(EINVAL); |
0ad19a3f | 2058 | |
4bf1968d | 2059 | if (nla_put_buffer(nlmsg, IFA_ADDRESS, addr, addrlen)) |
a5f5cb41 | 2060 | return ret_errno(EINVAL); |
0ad19a3f | 2061 | |
d8948a52 | 2062 | if (nla_put_buffer(nlmsg, IFA_BROADCAST, bcast, addrlen)) |
a5f5cb41 | 2063 | return ret_errno(EINVAL); |
1f1b18e7 | 2064 | |
ebc73a67 | 2065 | /* TODO: multicast, anycast with ipv6 */ |
79881dc6 DL |
2066 | if (family == AF_INET6 && |
2067 | (memcmp(bcast, &in6addr_any, sizeof(in6addr_any)) || | |
2068 | memcmp(acast, &in6addr_any, sizeof(in6addr_any)))) | |
a5f5cb41 | 2069 | return ret_errno(EPROTONOSUPPORT); |
0ad19a3f | 2070 | |
a5f5cb41 | 2071 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 2072 | } |
2073 | ||
1f1b18e7 | 2074 | int lxc_ipv6_addr_add(int ifindex, struct in6_addr *addr, |
ebc73a67 CB |
2075 | struct in6_addr *mcast, struct in6_addr *acast, |
2076 | int prefix) | |
1f1b18e7 DL |
2077 | { |
2078 | return ip_addr_add(AF_INET6, ifindex, addr, mcast, acast, prefix); | |
2079 | } | |
2080 | ||
ebc73a67 CB |
2081 | int lxc_ipv4_addr_add(int ifindex, struct in_addr *addr, struct in_addr *bcast, |
2082 | int prefix) | |
1f1b18e7 DL |
2083 | { |
2084 | return ip_addr_add(AF_INET, ifindex, addr, bcast, NULL, prefix); | |
2085 | } | |
2086 | ||
ebc73a67 CB |
2087 | /* Find an IFA_LOCAL (or IFA_ADDRESS if not IFA_LOCAL is present) address from |
2088 | * the given RTM_NEWADDR message. Allocates memory for the address and stores | |
2089 | * that pointer in *res (so res should be an in_addr** or in6_addr**). | |
19a26f82 | 2090 | */ |
6ce39620 CB |
2091 | #pragma GCC diagnostic push |
2092 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2093 | ||
ebc73a67 CB |
2094 | static int ifa_get_local_ip(int family, struct nlmsghdr *msg, void **res) |
2095 | { | |
2096 | int addrlen; | |
06f976ca SZ |
2097 | struct ifaddrmsg *ifa = NLMSG_DATA(msg); |
2098 | struct rtattr *rta = IFA_RTA(ifa); | |
2099 | int attr_len = NLMSG_PAYLOAD(msg, sizeof(struct ifaddrmsg)); | |
19a26f82 | 2100 | |
06f976ca | 2101 | if (ifa->ifa_family != family) |
19a26f82 MK |
2102 | return 0; |
2103 | ||
ebc73a67 CB |
2104 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
2105 | : sizeof(struct in6_addr); | |
19a26f82 MK |
2106 | |
2107 | /* Loop over the rtattr's in this message */ | |
ebc73a67 | 2108 | while (RTA_OK(rta, attr_len)) { |
19a26f82 | 2109 | /* Found a local address for the requested interface, |
ebc73a67 CB |
2110 | * return it. |
2111 | */ | |
2112 | if (rta->rta_type == IFA_LOCAL || | |
2113 | rta->rta_type == IFA_ADDRESS) { | |
2114 | /* Sanity check. The family check above should make sure | |
2115 | * the address length is correct, but check here just in | |
2116 | * case. | |
2117 | */ | |
19a26f82 MK |
2118 | if (RTA_PAYLOAD(rta) != addrlen) |
2119 | return -1; | |
2120 | ||
ebc73a67 CB |
2121 | /* We might have found an IFA_ADDRESS before, which we |
2122 | * now overwrite with an IFA_LOCAL. | |
2123 | */ | |
dd66e5ad | 2124 | if (!*res) { |
19a26f82 | 2125 | *res = malloc(addrlen); |
dd66e5ad DE |
2126 | if (!*res) |
2127 | return -1; | |
2128 | } | |
19a26f82 MK |
2129 | |
2130 | memcpy(*res, RTA_DATA(rta), addrlen); | |
19a26f82 MK |
2131 | if (rta->rta_type == IFA_LOCAL) |
2132 | break; | |
2133 | } | |
2134 | rta = RTA_NEXT(rta, attr_len); | |
2135 | } | |
2136 | return 0; | |
2137 | } | |
2138 | ||
6ce39620 CB |
2139 | #pragma GCC diagnostic pop |
2140 | ||
19a26f82 MK |
2141 | static int ip_addr_get(int family, int ifindex, void **res) |
2142 | { | |
a5f5cb41 CB |
2143 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
2144 | struct nl_handler nlh; | |
2145 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 2146 | int answer_len, err; |
06f976ca | 2147 | struct ifaddrmsg *ifa; |
19a26f82 | 2148 | struct nlmsghdr *msg; |
ebc73a67 | 2149 | int readmore = 0, recv_len = 0; |
19a26f82 | 2150 | |
a5f5cb41 | 2151 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
19a26f82 MK |
2152 | if (err) |
2153 | return err; | |
2154 | ||
19a26f82 MK |
2155 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
2156 | if (!nlmsg) | |
a5f5cb41 | 2157 | return ret_errno(ENOMEM); |
19a26f82 | 2158 | |
06f976ca | 2159 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
19a26f82 | 2160 | if (!answer) |
a5f5cb41 | 2161 | return ret_errno(ENOMEM); |
19a26f82 | 2162 | |
ebc73a67 CB |
2163 | /* Save the answer buffer length, since it will be overwritten on the |
2164 | * first receive (and we might need to receive more than once). | |
2165 | */ | |
06f976ca SZ |
2166 | answer_len = answer->nlmsghdr->nlmsg_len; |
2167 | ||
ebc73a67 | 2168 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ROOT; |
06f976ca | 2169 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETADDR; |
19a26f82 | 2170 | |
06f976ca | 2171 | ifa = nlmsg_reserve(nlmsg, sizeof(struct ifaddrmsg)); |
25a9939b | 2172 | if (!ifa) |
a5f5cb41 CB |
2173 | return ret_errno(ENOMEM); |
2174 | ||
06f976ca | 2175 | ifa->ifa_family = family; |
19a26f82 | 2176 | |
ebc73a67 CB |
2177 | /* Send the request for addresses, which returns all addresses on all |
2178 | * interfaces. | |
2179 | */ | |
a5f5cb41 | 2180 | err = netlink_send(nlh_ptr, nlmsg); |
19a26f82 | 2181 | if (err < 0) |
a5f5cb41 | 2182 | return ret_set_errno(err, errno); |
19a26f82 | 2183 | |
6ce39620 CB |
2184 | #pragma GCC diagnostic push |
2185 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2186 | ||
19a26f82 MK |
2187 | do { |
2188 | /* Restore the answer buffer length, it might have been | |
ebc73a67 CB |
2189 | * overwritten by a previous receive. |
2190 | */ | |
06f976ca | 2191 | answer->nlmsghdr->nlmsg_len = answer_len; |
19a26f82 | 2192 | |
ebc73a67 | 2193 | /* Get the (next) batch of reply messages. */ |
a5f5cb41 | 2194 | err = netlink_rcv(nlh_ptr, answer); |
19a26f82 | 2195 | if (err < 0) |
a5f5cb41 | 2196 | return ret_set_errno(err, errno); |
19a26f82 MK |
2197 | |
2198 | recv_len = err; | |
2199 | err = 0; | |
2200 | ||
ebc73a67 | 2201 | /* Satisfy the typing for the netlink macros. */ |
06f976ca | 2202 | msg = answer->nlmsghdr; |
19a26f82 MK |
2203 | |
2204 | while (NLMSG_OK(msg, recv_len)) { | |
ebc73a67 | 2205 | /* Stop reading if we see an error message. */ |
19a26f82 | 2206 | if (msg->nlmsg_type == NLMSG_ERROR) { |
a5f5cb41 CB |
2207 | struct nlmsgerr *errmsg = (struct nlmsgerr *)NLMSG_DATA(msg); |
2208 | return ret_set_errno(errmsg->error, errno); | |
19a26f82 MK |
2209 | } |
2210 | ||
ebc73a67 | 2211 | /* Stop reading if we see a NLMSG_DONE message. */ |
19a26f82 MK |
2212 | if (msg->nlmsg_type == NLMSG_DONE) { |
2213 | readmore = 0; | |
2214 | break; | |
2215 | } | |
2216 | ||
a5f5cb41 CB |
2217 | if (msg->nlmsg_type != RTM_NEWADDR) |
2218 | return ret_errno(EINVAL); | |
19a26f82 | 2219 | |
06f976ca SZ |
2220 | ifa = (struct ifaddrmsg *)NLMSG_DATA(msg); |
2221 | if (ifa->ifa_index == ifindex) { | |
a5f5cb41 CB |
2222 | if (ifa_get_local_ip(family, msg, res) < 0) |
2223 | return ret_errno(EINVAL); | |
51e7a874 | 2224 | |
ebc73a67 | 2225 | /* Found a result, stop searching. */ |
19a26f82 | 2226 | if (*res) |
a5f5cb41 | 2227 | return 0; |
19a26f82 MK |
2228 | } |
2229 | ||
ebc73a67 CB |
2230 | /* Keep reading more data from the socket if the last |
2231 | * message had the NLF_F_MULTI flag set. | |
2232 | */ | |
19a26f82 MK |
2233 | readmore = (msg->nlmsg_flags & NLM_F_MULTI); |
2234 | ||
ebc73a67 | 2235 | /* Look at the next message received in this buffer. */ |
19a26f82 MK |
2236 | msg = NLMSG_NEXT(msg, recv_len); |
2237 | } | |
2238 | } while (readmore); | |
2239 | ||
6ce39620 CB |
2240 | #pragma GCC diagnostic pop |
2241 | ||
19a26f82 | 2242 | /* If we end up here, we didn't find any result, so signal an |
ebc73a67 CB |
2243 | * error. |
2244 | */ | |
a5f5cb41 | 2245 | return -1; |
19a26f82 MK |
2246 | } |
2247 | ||
2248 | int lxc_ipv6_addr_get(int ifindex, struct in6_addr **res) | |
2249 | { | |
ebc73a67 | 2250 | return ip_addr_get(AF_INET6, ifindex, (void **)res); |
19a26f82 MK |
2251 | } |
2252 | ||
ebc73a67 | 2253 | int lxc_ipv4_addr_get(int ifindex, struct in_addr **res) |
19a26f82 | 2254 | { |
ebc73a67 | 2255 | return ip_addr_get(AF_INET, ifindex, (void **)res); |
19a26f82 MK |
2256 | } |
2257 | ||
f8fee0e2 MK |
2258 | static int ip_gateway_add(int family, int ifindex, void *gw) |
2259 | { | |
a5f5cb41 | 2260 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
f8fee0e2 | 2261 | struct nl_handler nlh; |
a5f5cb41 CB |
2262 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
2263 | int addrlen, err; | |
06f976ca | 2264 | struct rtmsg *rt; |
f8fee0e2 | 2265 | |
ebc73a67 CB |
2266 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
2267 | : sizeof(struct in6_addr); | |
f8fee0e2 | 2268 | |
a5f5cb41 | 2269 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
f8fee0e2 MK |
2270 | if (err) |
2271 | return err; | |
2272 | ||
f8fee0e2 MK |
2273 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
2274 | if (!nlmsg) | |
a5f5cb41 | 2275 | return ret_errno(ENOMEM); |
f8fee0e2 | 2276 | |
06f976ca | 2277 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
f8fee0e2 | 2278 | if (!answer) |
a5f5cb41 | 2279 | return ret_errno(ENOMEM); |
f8fee0e2 | 2280 | |
a5f5cb41 | 2281 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
06f976ca SZ |
2282 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWROUTE; |
2283 | ||
2284 | rt = nlmsg_reserve(nlmsg, sizeof(struct rtmsg)); | |
25a9939b | 2285 | if (!rt) |
a5f5cb41 CB |
2286 | return ret_errno(ENOMEM); |
2287 | ||
06f976ca SZ |
2288 | rt->rtm_family = family; |
2289 | rt->rtm_table = RT_TABLE_MAIN; | |
2290 | rt->rtm_scope = RT_SCOPE_UNIVERSE; | |
2291 | rt->rtm_protocol = RTPROT_BOOT; | |
2292 | rt->rtm_type = RTN_UNICAST; | |
f8fee0e2 | 2293 | /* "default" destination */ |
06f976ca | 2294 | rt->rtm_dst_len = 0; |
f8fee0e2 | 2295 | |
a2f9a670 | 2296 | /* If gateway address not supplied, then a device route will be created instead */ |
a5f5cb41 CB |
2297 | if (gw && nla_put_buffer(nlmsg, RTA_GATEWAY, gw, addrlen)) |
2298 | return ret_errno(ENOMEM); | |
f8fee0e2 MK |
2299 | |
2300 | /* Adding the interface index enables the use of link-local | |
ebc73a67 CB |
2301 | * addresses for the gateway. |
2302 | */ | |
f8fee0e2 | 2303 | if (nla_put_u32(nlmsg, RTA_OIF, ifindex)) |
a5f5cb41 | 2304 | return ret_errno(EINVAL); |
f8fee0e2 | 2305 | |
a5f5cb41 | 2306 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
f8fee0e2 MK |
2307 | } |
2308 | ||
2309 | int lxc_ipv4_gateway_add(int ifindex, struct in_addr *gw) | |
2310 | { | |
2311 | return ip_gateway_add(AF_INET, ifindex, gw); | |
2312 | } | |
2313 | ||
2314 | int lxc_ipv6_gateway_add(int ifindex, struct in6_addr *gw) | |
2315 | { | |
2316 | return ip_gateway_add(AF_INET6, ifindex, gw); | |
2317 | } | |
581c75e7 | 2318 | bool is_ovs_bridge(const char *bridge) |
0d204771 | 2319 | { |
ebc73a67 | 2320 | int ret; |
0d204771 | 2321 | struct stat sb; |
ebc73a67 | 2322 | char brdirname[22 + IFNAMSIZ + 1] = {0}; |
0d204771 | 2323 | |
ebc73a67 CB |
2324 | ret = snprintf(brdirname, 22 + IFNAMSIZ + 1, "/sys/class/net/%s/bridge", |
2325 | bridge); | |
2326 | if (ret < 0 || (size_t)ret >= 22 + IFNAMSIZ + 1) | |
2327 | return false; | |
2328 | ||
2329 | ret = stat(brdirname, &sb); | |
2330 | if (ret < 0 && errno == ENOENT) | |
0d204771 | 2331 | return true; |
ebc73a67 | 2332 | |
0d204771 SH |
2333 | return false; |
2334 | } | |
2335 | ||
581c75e7 CB |
2336 | struct ovs_veth_args { |
2337 | const char *bridge; | |
2338 | const char *nic; | |
2339 | }; | |
2340 | ||
cb0dc11b CB |
2341 | /* Called from a background thread - when nic goes away, remove it from the |
2342 | * bridge. | |
c43cbc04 | 2343 | */ |
581c75e7 | 2344 | static int lxc_ovs_delete_port_exec(void *data) |
c43cbc04 | 2345 | { |
581c75e7 | 2346 | struct ovs_veth_args *args = data; |
cb0dc11b | 2347 | |
9c66dc4f | 2348 | execlp("ovs-vsctl", "ovs-vsctl", "del-port", args->bridge, args->nic, (char *)NULL); |
581c75e7 | 2349 | return -1; |
c43cbc04 SH |
2350 | } |
2351 | ||
581c75e7 | 2352 | int lxc_ovs_delete_port(const char *bridge, const char *nic) |
0d204771 | 2353 | { |
c43cbc04 | 2354 | int ret; |
419590da | 2355 | char cmd_output[PATH_MAX]; |
581c75e7 | 2356 | struct ovs_veth_args args; |
6ad22d06 | 2357 | |
581c75e7 CB |
2358 | args.bridge = bridge; |
2359 | args.nic = nic; | |
2360 | ret = run_command(cmd_output, sizeof(cmd_output), | |
2361 | lxc_ovs_delete_port_exec, (void *)&args); | |
9c66dc4f CB |
2362 | if (ret < 0) |
2363 | return log_error(-1, "Failed to delete \"%s\" from openvswitch bridge \"%s\": %s", nic, bridge, cmd_output); | |
0d204771 | 2364 | |
581c75e7 CB |
2365 | return 0; |
2366 | } | |
ebc73a67 | 2367 | |
581c75e7 CB |
2368 | static int lxc_ovs_attach_bridge_exec(void *data) |
2369 | { | |
2370 | struct ovs_veth_args *args = data; | |
ebc73a67 | 2371 | |
9c66dc4f | 2372 | execlp("ovs-vsctl", "ovs-vsctl", "add-port", args->bridge, args->nic, (char *)NULL); |
581c75e7 CB |
2373 | return -1; |
2374 | } | |
ebc73a67 | 2375 | |
581c75e7 CB |
2376 | static int lxc_ovs_attach_bridge(const char *bridge, const char *nic) |
2377 | { | |
2378 | int ret; | |
419590da | 2379 | char cmd_output[PATH_MAX]; |
581c75e7 | 2380 | struct ovs_veth_args args; |
ebc73a67 | 2381 | |
581c75e7 CB |
2382 | args.bridge = bridge; |
2383 | args.nic = nic; | |
2384 | ret = run_command(cmd_output, sizeof(cmd_output), | |
2385 | lxc_ovs_attach_bridge_exec, (void *)&args); | |
9c66dc4f CB |
2386 | if (ret < 0) |
2387 | return log_error(-1, "Failed to attach \"%s\" to openvswitch bridge \"%s\": %s", nic, bridge, cmd_output); | |
0d204771 | 2388 | |
581c75e7 | 2389 | return 0; |
0d204771 | 2390 | } |
0d204771 | 2391 | |
581c75e7 | 2392 | int lxc_bridge_attach(const char *bridge, const char *ifname) |
0ad19a3f | 2393 | { |
ebc73a67 | 2394 | int err, fd, index; |
9de31d5a | 2395 | size_t retlen; |
0ad19a3f | 2396 | struct ifreq ifr; |
2397 | ||
dae3fdf6 | 2398 | if (strlen(ifname) >= IFNAMSIZ) |
3cfc0f3a | 2399 | return -EINVAL; |
0ad19a3f | 2400 | |
2401 | index = if_nametoindex(ifname); | |
2402 | if (!index) | |
3cfc0f3a | 2403 | return -EINVAL; |
0ad19a3f | 2404 | |
0d204771 | 2405 | if (is_ovs_bridge(bridge)) |
581c75e7 | 2406 | return lxc_ovs_attach_bridge(bridge, ifname); |
0d204771 | 2407 | |
ad9429e5 | 2408 | fd = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0); |
0ad19a3f | 2409 | if (fd < 0) |
3cfc0f3a | 2410 | return -errno; |
0ad19a3f | 2411 | |
9de31d5a | 2412 | retlen = strlcpy(ifr.ifr_name, bridge, IFNAMSIZ); |
42cc4083 CB |
2413 | if (retlen >= IFNAMSIZ) { |
2414 | close(fd); | |
9de31d5a | 2415 | return -E2BIG; |
42cc4083 | 2416 | } |
9de31d5a | 2417 | |
ebc73a67 | 2418 | ifr.ifr_name[IFNAMSIZ - 1] = '\0'; |
0ad19a3f | 2419 | ifr.ifr_ifindex = index; |
7d163508 | 2420 | err = ioctl(fd, SIOCBRADDIF, &ifr); |
0ad19a3f | 2421 | close(fd); |
3cfc0f3a MN |
2422 | if (err) |
2423 | err = -errno; | |
0ad19a3f | 2424 | |
2425 | return err; | |
2426 | } | |
72d0e1cb | 2427 | |
ebc73a67 | 2428 | static const char *const lxc_network_types[LXC_NET_MAXCONFTYPE + 1] = { |
b343592b | 2429 | [LXC_NET_EMPTY] = "empty", |
72d0e1cb SG |
2430 | [LXC_NET_VETH] = "veth", |
2431 | [LXC_NET_MACVLAN] = "macvlan", | |
c9f52382 | 2432 | [LXC_NET_IPVLAN] = "ipvlan", |
72d0e1cb | 2433 | [LXC_NET_PHYS] = "phys", |
b343592b BP |
2434 | [LXC_NET_VLAN] = "vlan", |
2435 | [LXC_NET_NONE] = "none", | |
72d0e1cb SG |
2436 | }; |
2437 | ||
2438 | const char *lxc_net_type_to_str(int type) | |
2439 | { | |
2440 | if (type < 0 || type > LXC_NET_MAXCONFTYPE) | |
2441 | return NULL; | |
ebc73a67 | 2442 | |
72d0e1cb SG |
2443 | return lxc_network_types[type]; |
2444 | } | |
8befa924 | 2445 | |
3646ffd9 | 2446 | static const char padchar[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; |
a0265685 | 2447 | |
3646ffd9 | 2448 | char *lxc_ifname_alnum_case_sensitive(char *template) |
a0265685 | 2449 | { |
2d7bf744 | 2450 | int ret; |
b1e44ed1 | 2451 | struct netns_ifaddrs *ifa, *ifaddr; |
966e9f1f CB |
2452 | char name[IFNAMSIZ]; |
2453 | bool exists = false; | |
2454 | size_t i = 0; | |
280cc35f | 2455 | #ifdef HAVE_RAND_R |
2456 | unsigned int seed; | |
2457 | ||
2458 | seed = randseed(false); | |
2459 | #else | |
2460 | ||
2461 | (void)randseed(true); | |
2462 | #endif | |
a0265685 | 2463 | |
535e8859 CB |
2464 | if (strlen(template) >= IFNAMSIZ) |
2465 | return NULL; | |
2466 | ||
ebc73a67 | 2467 | /* Get all the network interfaces. */ |
b1e44ed1 | 2468 | ret = netns_getifaddrs(&ifaddr, -1, &(bool){false}); |
9c66dc4f CB |
2469 | if (ret < 0) |
2470 | return log_error_errno(NULL, errno, "Failed to get network interfaces"); | |
a0265685 | 2471 | |
ebc73a67 | 2472 | /* Generate random names until we find one that doesn't exist. */ |
51a8a74c | 2473 | for (;;) { |
966e9f1f | 2474 | name[0] = '\0'; |
94b1cade | 2475 | (void)strlcpy(name, template, IFNAMSIZ); |
a0265685 | 2476 | |
966e9f1f | 2477 | exists = false; |
280cc35f | 2478 | |
a0265685 SG |
2479 | for (i = 0; i < strlen(name); i++) { |
2480 | if (name[i] == 'X') { | |
2481 | #ifdef HAVE_RAND_R | |
8523344a | 2482 | name[i] = padchar[rand_r(&seed) % strlen(padchar)]; |
a0265685 | 2483 | #else |
8523344a | 2484 | name[i] = padchar[rand() % strlen(padchar)]; |
a0265685 SG |
2485 | #endif |
2486 | } | |
2487 | } | |
2488 | ||
2489 | for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { | |
966e9f1f CB |
2490 | if (!strcmp(ifa->ifa_name, name)) { |
2491 | exists = true; | |
a0265685 SG |
2492 | break; |
2493 | } | |
2494 | } | |
2495 | ||
966e9f1f | 2496 | if (!exists) |
a0265685 | 2497 | break; |
a0265685 SG |
2498 | } |
2499 | ||
b1e44ed1 | 2500 | netns_freeifaddrs(ifaddr); |
94b1cade DJ |
2501 | (void)strlcpy(template, name, strlen(template) + 1); |
2502 | ||
2503 | return template; | |
a0265685 SG |
2504 | } |
2505 | ||
8befa924 SH |
2506 | int setup_private_host_hw_addr(char *veth1) |
2507 | { | |
ebc73a67 | 2508 | int err, sockfd; |
8befa924 | 2509 | struct ifreq ifr; |
8befa924 | 2510 | |
ad9429e5 | 2511 | sockfd = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0); |
8befa924 SH |
2512 | if (sockfd < 0) |
2513 | return -errno; | |
2514 | ||
ebc73a67 | 2515 | err = snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); |
87c6e5db DJ |
2516 | if (err < 0 || (size_t)err >= IFNAMSIZ) { |
2517 | close(sockfd); | |
ebc73a67 | 2518 | return -E2BIG; |
87c6e5db | 2519 | } |
ebc73a67 | 2520 | |
8befa924 SH |
2521 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); |
2522 | if (err < 0) { | |
8befa924 | 2523 | close(sockfd); |
8befa924 SH |
2524 | return -errno; |
2525 | } | |
2526 | ||
2527 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
2528 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
8befa924 | 2529 | close(sockfd); |
8befa924 SH |
2530 | if (err < 0) |
2531 | return -errno; | |
2532 | ||
2533 | return 0; | |
2534 | } | |
811ef482 CB |
2535 | |
2536 | int lxc_find_gateway_addresses(struct lxc_handler *handler) | |
2537 | { | |
2538 | struct lxc_list *network = &handler->conf->network; | |
2539 | struct lxc_list *iterator; | |
2540 | struct lxc_netdev *netdev; | |
2541 | int link_index; | |
2542 | ||
2543 | lxc_list_for_each(iterator, network) { | |
2544 | netdev = iterator->elem; | |
2545 | ||
2546 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
2547 | continue; | |
2548 | ||
9c66dc4f CB |
2549 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) |
2550 | return log_error_errno(-1, EINVAL, "Automatic gateway detection is only supported for veth and macvlan"); | |
811ef482 | 2551 | |
f2711167 | 2552 | if (is_empty_string(netdev->link)) { |
9c66dc4f | 2553 | return log_error_errno(-1, errno, "Automatic gateway detection needs a link interface"); |
811ef482 CB |
2554 | } |
2555 | ||
2556 | link_index = if_nametoindex(netdev->link); | |
2557 | if (!link_index) | |
2558 | return -EINVAL; | |
2559 | ||
2560 | if (netdev->ipv4_gateway_auto) { | |
9c66dc4f CB |
2561 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) |
2562 | return log_error_errno(-1, errno, "Failed to automatically find ipv4 gateway address from link interface \"%s\"", netdev->link); | |
811ef482 CB |
2563 | } |
2564 | ||
2565 | if (netdev->ipv6_gateway_auto) { | |
9c66dc4f CB |
2566 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) |
2567 | return log_error_errno(-1, errno, "Failed to automatically find ipv6 gateway address from link interface \"%s\"", netdev->link); | |
811ef482 CB |
2568 | } |
2569 | } | |
2570 | ||
2571 | return 0; | |
2572 | } | |
2573 | ||
2574 | #define LXC_USERNIC_PATH LIBEXECDIR "/lxc/lxc-user-nic" | |
f0ecc19d | 2575 | static int lxc_create_network_unpriv_exec(const char *lxcpath, const char *lxcname, |
4d781681 | 2576 | struct lxc_netdev *netdev, pid_t pid, unsigned int hooks_version) |
811ef482 CB |
2577 | { |
2578 | int ret; | |
2579 | pid_t child; | |
2580 | int bytes, pipefd[2]; | |
2581 | char *token, *saveptr = NULL; | |
095ead80 | 2582 | char netdev_link[IFNAMSIZ]; |
419590da | 2583 | char buffer[PATH_MAX] = {0}; |
94b1cade | 2584 | size_t retlen; |
811ef482 | 2585 | |
9c66dc4f CB |
2586 | if (netdev->type != LXC_NET_VETH) |
2587 | return log_error_errno(-1, errno, "Network type %d not support for unprivileged use", netdev->type); | |
811ef482 CB |
2588 | |
2589 | ret = pipe(pipefd); | |
9c66dc4f CB |
2590 | if (ret < 0) |
2591 | return log_error_errno(-1, errno, "Failed to create pipe"); | |
811ef482 CB |
2592 | |
2593 | child = fork(); | |
2594 | if (child < 0) { | |
811ef482 CB |
2595 | close(pipefd[0]); |
2596 | close(pipefd[1]); | |
9c66dc4f | 2597 | return log_error_errno(-1, errno, "Failed to create new process"); |
811ef482 CB |
2598 | } |
2599 | ||
2600 | if (child == 0) { | |
8335fd40 | 2601 | char pidstr[INTTYPE_TO_STRLEN(pid_t)]; |
811ef482 CB |
2602 | |
2603 | close(pipefd[0]); | |
2604 | ||
2605 | ret = dup2(pipefd[1], STDOUT_FILENO); | |
2606 | if (ret >= 0) | |
2607 | ret = dup2(pipefd[1], STDERR_FILENO); | |
2608 | close(pipefd[1]); | |
2609 | if (ret < 0) { | |
2610 | SYSERROR("Failed to duplicate std{err,out} file descriptor"); | |
78070056 | 2611 | _exit(EXIT_FAILURE); |
811ef482 CB |
2612 | } |
2613 | ||
f2711167 | 2614 | if (!is_empty_string(netdev->link)) |
9de31d5a | 2615 | retlen = strlcpy(netdev_link, netdev->link, IFNAMSIZ); |
811ef482 | 2616 | else |
9de31d5a CB |
2617 | retlen = strlcpy(netdev_link, "none", IFNAMSIZ); |
2618 | if (retlen >= IFNAMSIZ) { | |
2619 | SYSERROR("Invalid network device name"); | |
2620 | _exit(EXIT_FAILURE); | |
2621 | } | |
811ef482 | 2622 | |
8335fd40 CB |
2623 | ret = snprintf(pidstr, sizeof(pidstr), "%d", pid); |
2624 | if (ret < 0 || ret >= sizeof(pidstr)) | |
78070056 | 2625 | _exit(EXIT_FAILURE); |
8335fd40 | 2626 | pidstr[sizeof(pidstr) - 1] = '\0'; |
811ef482 CB |
2627 | |
2628 | INFO("Execing lxc-user-nic create %s %s %s veth %s %s", lxcpath, | |
2629 | lxcname, pidstr, netdev_link, | |
3473ca76 CB |
2630 | !is_empty_string(netdev->name) ? netdev->name : "(null)"); |
2631 | if (!is_empty_string(netdev->name)) | |
811ef482 CB |
2632 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "create", |
2633 | lxcpath, lxcname, pidstr, "veth", netdev_link, | |
2634 | netdev->name, (char *)NULL); | |
2635 | else | |
2636 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "create", | |
2637 | lxcpath, lxcname, pidstr, "veth", netdev_link, | |
2638 | (char *)NULL); | |
2639 | SYSERROR("Failed to execute lxc-user-nic"); | |
78070056 | 2640 | _exit(EXIT_FAILURE); |
811ef482 CB |
2641 | } |
2642 | ||
2643 | /* close the write-end of the pipe */ | |
2644 | close(pipefd[1]); | |
2645 | ||
9c66dc4f | 2646 | bytes = lxc_read_nointr(pipefd[0], &buffer, sizeof(buffer)); |
811ef482 | 2647 | if (bytes < 0) { |
74c6e2b0 | 2648 | SYSERROR("Failed to read from pipe file descriptor"); |
811ef482 | 2649 | close(pipefd[0]); |
6b9f82a9 CB |
2650 | } else { |
2651 | buffer[bytes - 1] = '\0'; | |
811ef482 | 2652 | } |
811ef482 CB |
2653 | |
2654 | ret = wait_for_pid(child); | |
2655 | close(pipefd[0]); | |
9c66dc4f CB |
2656 | if (ret != 0 || bytes < 0) |
2657 | return log_error(-1, "lxc-user-nic failed to configure requested network: %s", buffer[0] != '\0' ? buffer : "(null)"); | |
811ef482 CB |
2658 | TRACE("Received output \"%s\" from lxc-user-nic", buffer); |
2659 | ||
2660 | /* netdev->name */ | |
2661 | token = strtok_r(buffer, ":", &saveptr); | |
9c66dc4f CB |
2662 | if (!token) |
2663 | return log_error(-1, "Failed to parse lxc-user-nic output"); | |
811ef482 | 2664 | |
e389f2af CB |
2665 | /* |
2666 | * lxc-user-nic will take care of proper network device naming. So | |
2667 | * netdev->name and netdev->created_name need to be identical to not | |
2668 | * trigger another rename later on. | |
2669 | */ | |
2670 | retlen = strlcpy(netdev->name, token, IFNAMSIZ); | |
2671 | if (retlen < IFNAMSIZ) | |
2672 | retlen = strlcpy(netdev->created_name, token, IFNAMSIZ); | |
9c66dc4f CB |
2673 | if (retlen >= IFNAMSIZ) |
2674 | return log_error_errno(-1, E2BIG, "Container side veth device name returned by lxc-user-nic is too long"); | |
811ef482 | 2675 | |
74c6e2b0 | 2676 | /* netdev->ifindex */ |
811ef482 | 2677 | token = strtok_r(NULL, ":", &saveptr); |
9c66dc4f CB |
2678 | if (!token) |
2679 | return log_error(-1, "Failed to parse lxc-user-nic output"); | |
811ef482 | 2680 | |
74c6e2b0 | 2681 | ret = lxc_safe_int(token, &netdev->ifindex); |
9c66dc4f CB |
2682 | if (ret < 0) |
2683 | return log_error_errno(-1, -ret, "Failed to convert string \"%s\" to integer", token); | |
811ef482 | 2684 | |
74c6e2b0 | 2685 | /* netdev->priv.veth_attr.veth1 */ |
811ef482 | 2686 | token = strtok_r(NULL, ":", &saveptr); |
9c66dc4f CB |
2687 | if (!token) |
2688 | return log_error(-1, "Failed to parse lxc-user-nic output"); | |
811ef482 | 2689 | |
94b1cade | 2690 | retlen = strlcpy(netdev->priv.veth_attr.veth1, token, IFNAMSIZ); |
9c66dc4f CB |
2691 | if (retlen >= IFNAMSIZ) |
2692 | return log_error_errno(-1, E2BIG, "Host side veth device name returned by lxc-user-nic is too long"); | |
74c6e2b0 CB |
2693 | |
2694 | /* netdev->priv.veth_attr.ifindex */ | |
2695 | token = strtok_r(NULL, ":", &saveptr); | |
9c66dc4f CB |
2696 | if (!token) |
2697 | return log_error(-1, "Failed to parse lxc-user-nic output"); | |
74c6e2b0 CB |
2698 | |
2699 | ret = lxc_safe_int(token, &netdev->priv.veth_attr.ifindex); | |
9c66dc4f CB |
2700 | if (ret < 0) |
2701 | return log_error_errno(-1, -ret, "Failed to convert string \"%s\" to integer", token); | |
811ef482 | 2702 | |
4d781681 | 2703 | if (netdev->upscript) { |
2704 | char *argv[] = { | |
2705 | "veth", | |
2706 | netdev->link, | |
2707 | netdev->priv.veth_attr.veth1, | |
2708 | NULL, | |
2709 | }; | |
2710 | ||
e389f2af CB |
2711 | ret = run_script_argv(lxcname, hooks_version, "net", |
2712 | netdev->upscript, "up", argv); | |
4d781681 | 2713 | if (ret < 0) |
2714 | return -1; | |
2715 | } | |
2716 | ||
811ef482 CB |
2717 | return 0; |
2718 | } | |
2719 | ||
f0ecc19d | 2720 | static int lxc_delete_network_unpriv_exec(const char *lxcpath, const char *lxcname, |
1bd8d726 CB |
2721 | struct lxc_netdev *netdev, |
2722 | const char *netns_path) | |
811ef482 CB |
2723 | { |
2724 | int bytes, ret; | |
2725 | pid_t child; | |
2726 | int pipefd[2]; | |
419590da | 2727 | char buffer[PATH_MAX] = {0}; |
811ef482 | 2728 | |
9c66dc4f CB |
2729 | if (netdev->type != LXC_NET_VETH) |
2730 | return log_error_errno(-1, EINVAL, "Network type %d not support for unprivileged use", netdev->type); | |
811ef482 CB |
2731 | |
2732 | ret = pipe(pipefd); | |
9c66dc4f CB |
2733 | if (ret < 0) |
2734 | return log_error_errno(-1, errno, "Failed to create pipe"); | |
811ef482 CB |
2735 | |
2736 | child = fork(); | |
2737 | if (child < 0) { | |
811ef482 CB |
2738 | close(pipefd[0]); |
2739 | close(pipefd[1]); | |
9c66dc4f | 2740 | return log_error_errno(-1, errno, "Failed to create new process"); |
811ef482 CB |
2741 | } |
2742 | ||
2743 | if (child == 0) { | |
8843fde4 | 2744 | char *hostveth; |
811ef482 CB |
2745 | |
2746 | close(pipefd[0]); | |
2747 | ||
2748 | ret = dup2(pipefd[1], STDOUT_FILENO); | |
2749 | if (ret >= 0) | |
2750 | ret = dup2(pipefd[1], STDERR_FILENO); | |
2751 | close(pipefd[1]); | |
2752 | if (ret < 0) { | |
2753 | SYSERROR("Failed to duplicate std{err,out} file descriptor"); | |
a30b9023 | 2754 | _exit(EXIT_FAILURE); |
811ef482 CB |
2755 | } |
2756 | ||
f2711167 | 2757 | if (!is_empty_string(netdev->priv.veth_attr.pair)) |
8843fde4 CB |
2758 | hostveth = netdev->priv.veth_attr.pair; |
2759 | else | |
2760 | hostveth = netdev->priv.veth_attr.veth1; | |
f2711167 | 2761 | if (is_empty_string(hostveth)) { |
74c6e2b0 | 2762 | SYSERROR("Host side veth device name is missing"); |
a30b9023 | 2763 | _exit(EXIT_FAILURE); |
74c6e2b0 CB |
2764 | } |
2765 | ||
f2711167 CB |
2766 | if (is_empty_string(netdev->link)) { |
2767 | SYSERROR("Network link for network device \"%s\" is missing", netdev->priv.veth_attr.veth1); | |
a30b9023 | 2768 | _exit(EXIT_FAILURE); |
74c6e2b0 | 2769 | } |
811ef482 | 2770 | |
811ef482 | 2771 | INFO("Execing lxc-user-nic delete %s %s %s veth %s %s", lxcpath, |
8843fde4 | 2772 | lxcname, netns_path, netdev->link, hostveth); |
811ef482 | 2773 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "delete", lxcpath, |
8843fde4 CB |
2774 | lxcname, netns_path, "veth", netdev->link, hostveth, |
2775 | (char *)NULL); | |
811ef482 | 2776 | SYSERROR("Failed to exec lxc-user-nic."); |
a30b9023 | 2777 | _exit(EXIT_FAILURE); |
811ef482 CB |
2778 | } |
2779 | ||
2780 | close(pipefd[1]); | |
2781 | ||
9c66dc4f | 2782 | bytes = lxc_read_nointr(pipefd[0], &buffer, sizeof(buffer)); |
811ef482 CB |
2783 | if (bytes < 0) { |
2784 | SYSERROR("Failed to read from pipe file descriptor."); | |
2785 | close(pipefd[0]); | |
6b9f82a9 CB |
2786 | } else { |
2787 | buffer[bytes - 1] = '\0'; | |
811ef482 | 2788 | } |
811ef482 | 2789 | |
6b9f82a9 | 2790 | ret = wait_for_pid(child); |
9c66dc4f CB |
2791 | close_prot_errno_disarm(pipefd[0]); |
2792 | if (ret != 0 || bytes < 0) | |
2793 | return log_error_errno(-1, errno, "lxc-user-nic failed to delete requested network: %s", | |
2794 | !is_empty_string(buffer) ? buffer : "(null)"); | |
811ef482 | 2795 | |
811ef482 CB |
2796 | return 0; |
2797 | } | |
2798 | ||
1bd8d726 CB |
2799 | bool lxc_delete_network_unpriv(struct lxc_handler *handler) |
2800 | { | |
2801 | int ret; | |
2802 | struct lxc_list *iterator; | |
2803 | struct lxc_list *network = &handler->conf->network; | |
2804 | /* strlen("/proc/") = 6 | |
2805 | * + | |
8335fd40 | 2806 | * INTTYPE_TO_STRLEN(pid_t) |
1bd8d726 CB |
2807 | * + |
2808 | * strlen("/fd/") = 4 | |
2809 | * + | |
8335fd40 | 2810 | * INTTYPE_TO_STRLEN(int) |
1bd8d726 CB |
2811 | * + |
2812 | * \0 | |
2813 | */ | |
8335fd40 | 2814 | char netns_path[6 + INTTYPE_TO_STRLEN(pid_t) + 4 + INTTYPE_TO_STRLEN(int) + 1]; |
1bd8d726 CB |
2815 | |
2816 | *netns_path = '\0'; | |
2817 | ||
9c66dc4f CB |
2818 | if (handler->nsfd[LXC_NS_NET] < 0) |
2819 | return log_debug(false, "Cannot not guarantee safe deletion of network devices. Manual cleanup maybe needed"); | |
1bd8d726 CB |
2820 | |
2821 | ret = snprintf(netns_path, sizeof(netns_path), "/proc/%d/fd/%d", | |
0059379f | 2822 | lxc_raw_getpid(), handler->nsfd[LXC_NS_NET]); |
1bd8d726 CB |
2823 | if (ret < 0 || ret >= sizeof(netns_path)) |
2824 | return false; | |
2825 | ||
2826 | lxc_list_for_each(iterator, network) { | |
2827 | char *hostveth = NULL; | |
2828 | struct lxc_netdev *netdev = iterator->elem; | |
2829 | ||
2830 | /* We can only delete devices whose ifindex we have. If we don't | |
2831 | * have the index it means that we didn't create it. | |
2832 | */ | |
2833 | if (!netdev->ifindex) | |
2834 | continue; | |
2835 | ||
2836 | if (netdev->type == LXC_NET_PHYS) { | |
2837 | ret = lxc_netdev_rename_by_index(netdev->ifindex, | |
2838 | netdev->link); | |
2839 | if (ret < 0) | |
9c66dc4f | 2840 | WARN("Failed to rename interface with index %d to its initial name \"%s\"", |
1bd8d726 CB |
2841 | netdev->ifindex, netdev->link); |
2842 | else | |
9c66dc4f | 2843 | TRACE("Renamed interface with index %d to its initial name \"%s\"", |
1bd8d726 | 2844 | netdev->ifindex, netdev->link); |
b3259dc6 TP |
2845 | |
2846 | ret = netdev_deconf[netdev->type](handler, netdev); | |
66a7c406 | 2847 | goto clear_ifindices; |
1bd8d726 CB |
2848 | } |
2849 | ||
2850 | ret = netdev_deconf[netdev->type](handler, netdev); | |
2851 | if (ret < 0) | |
2852 | WARN("Failed to deconfigure network device"); | |
2853 | ||
2854 | if (netdev->type != LXC_NET_VETH) | |
66a7c406 | 2855 | goto clear_ifindices; |
1bd8d726 | 2856 | |
f2711167 | 2857 | if (is_empty_string(netdev->link) || !is_ovs_bridge(netdev->link)) |
66a7c406 | 2858 | goto clear_ifindices; |
1bd8d726 | 2859 | |
f2711167 | 2860 | if (!is_empty_string(netdev->priv.veth_attr.pair)) |
8843fde4 CB |
2861 | hostveth = netdev->priv.veth_attr.pair; |
2862 | else | |
2863 | hostveth = netdev->priv.veth_attr.veth1; | |
f2711167 | 2864 | if (is_empty_string(hostveth)) |
66a7c406 | 2865 | goto clear_ifindices; |
8843fde4 | 2866 | |
1bd8d726 CB |
2867 | ret = lxc_delete_network_unpriv_exec(handler->lxcpath, |
2868 | handler->name, netdev, | |
2869 | netns_path); | |
2870 | if (ret < 0) { | |
9c66dc4f | 2871 | WARN("Failed to remove port \"%s\" from openvswitch bridge \"%s\"", hostveth, netdev->link); |
66a7c406 | 2872 | goto clear_ifindices; |
1bd8d726 | 2873 | } |
9c66dc4f | 2874 | INFO("Removed interface \"%s\" from \"%s\"", hostveth, netdev->link); |
66a7c406 CB |
2875 | |
2876 | clear_ifindices: | |
0858c829 CB |
2877 | /* |
2878 | * We need to clear any ifindices we recorded so liblxc won't | |
2879 | * have cached stale data which would cause it to fail on | |
2880 | * reboot where we don't re-read the on-disk config file. | |
66a7c406 CB |
2881 | */ |
2882 | netdev->ifindex = 0; | |
2883 | if (netdev->type == LXC_NET_PHYS) { | |
2884 | netdev->priv.phys_attr.ifindex = 0; | |
2885 | } else if (netdev->type == LXC_NET_VETH) { | |
2886 | netdev->priv.veth_attr.veth1[0] = '\0'; | |
2887 | netdev->priv.veth_attr.ifindex = 0; | |
2888 | } | |
1bd8d726 CB |
2889 | } |
2890 | ||
bb84beda | 2891 | return true; |
1bd8d726 CB |
2892 | } |
2893 | ||
6509154d | 2894 | static int lxc_setup_l2proxy(struct lxc_netdev *netdev) { |
2895 | struct lxc_list *cur, *next; | |
2896 | struct lxc_inetdev *inet4dev; | |
2897 | struct lxc_inet6dev *inet6dev; | |
2898 | char bufinet4[INET_ADDRSTRLEN], bufinet6[INET6_ADDRSTRLEN]; | |
b670016a | 2899 | int err = 0; |
5fe147e9 TP |
2900 | unsigned int lo_ifindex = 0, link_ifindex = 0; |
2901 | ||
2902 | link_ifindex = if_nametoindex(netdev->link); | |
9c66dc4f CB |
2903 | if (link_ifindex == 0) |
2904 | return log_error_errno(-1, errno, "Failed to retrieve ifindex for \"%s\" l2proxy setup", netdev->link); | |
5fe147e9 | 2905 | |
6509154d | 2906 | |
2907 | /* If IPv4 addresses are specified, then check that sysctl is configured correctly. */ | |
2908 | if (!lxc_list_empty(&netdev->ipv4)) { | |
2909 | /* Check for net.ipv4.conf.[link].forwarding=1 */ | |
9c66dc4f CB |
2910 | if (lxc_is_ip_forwarding_enabled(netdev->link, AF_INET) < 0) |
2911 | return log_error_errno(-1, EINVAL, "Requires sysctl net.ipv4.conf.%s.forwarding=1", netdev->link); | |
6509154d | 2912 | } |
2913 | ||
2914 | /* If IPv6 addresses are specified, then check that sysctl is configured correctly. */ | |
2915 | if (!lxc_list_empty(&netdev->ipv6)) { | |
2916 | /* Check for net.ipv6.conf.[link].proxy_ndp=1 */ | |
9c66dc4f CB |
2917 | if (lxc_is_ip_neigh_proxy_enabled(netdev->link, AF_INET6) < 0) |
2918 | return log_error_errno(-1, EINVAL, "Requires sysctl net.ipv6.conf.%s.proxy_ndp=1", netdev->link); | |
6509154d | 2919 | |
2920 | /* Check for net.ipv6.conf.[link].forwarding=1 */ | |
9c66dc4f CB |
2921 | if (lxc_is_ip_forwarding_enabled(netdev->link, AF_INET6) < 0) |
2922 | return log_error_errno(-1, EINVAL, "Requires sysctl net.ipv6.conf.%s.forwarding=1", netdev->link); | |
6509154d | 2923 | } |
2924 | ||
b670016a | 2925 | /* Perform IPVLAN specific checks. */ |
2926 | if (netdev->type == LXC_NET_IPVLAN) { | |
2927 | /* Check mode is l3s as other modes do not work with l2proxy. */ | |
9c66dc4f CB |
2928 | if (netdev->priv.ipvlan_attr.mode != IPVLAN_MODE_L3S) |
2929 | return log_error_errno(-1, EINVAL, "Requires ipvlan mode on dev \"%s\" be l3s when used with l2proxy", netdev->link); | |
b670016a | 2930 | |
2931 | /* Retrieve local-loopback interface index for use with IPVLAN static routes. */ | |
3ebffb98 | 2932 | lo_ifindex = if_nametoindex(loop_device); |
9c66dc4f CB |
2933 | if (lo_ifindex == 0) |
2934 | return log_error_errno(-1, EINVAL, "Failed to retrieve ifindex for \"%s\" routing cleanup", loop_device); | |
b670016a | 2935 | } |
2936 | ||
6509154d | 2937 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { |
2938 | inet4dev = cur->elem; | |
2939 | if (!inet_ntop(AF_INET, &inet4dev->addr, bufinet4, sizeof(bufinet4))) | |
596a002c | 2940 | return ret_set_errno(-1, -errno); |
6509154d | 2941 | |
5fe147e9 | 2942 | if (lxc_ip_neigh_proxy(RTM_NEWNEIGH, AF_INET, link_ifindex, &inet4dev->addr) < 0) |
596a002c | 2943 | return ret_set_errno(-1, EINVAL); |
b670016a | 2944 | |
2945 | /* IPVLAN requires a route to local-loopback to trigger l2proxy. */ | |
2946 | if (netdev->type == LXC_NET_IPVLAN) { | |
2947 | err = lxc_ipv4_dest_add(lo_ifindex, &inet4dev->addr, 32); | |
9c66dc4f CB |
2948 | if (err < 0) |
2949 | return log_error_errno(-1, -err, "Failed to add ipv4 dest \"%s\" for network device \"%s\"", bufinet4, loop_device); | |
b670016a | 2950 | } |
6509154d | 2951 | } |
2952 | ||
2953 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
2954 | inet6dev = cur->elem; | |
2955 | if (!inet_ntop(AF_INET6, &inet6dev->addr, bufinet6, sizeof(bufinet6))) | |
596a002c | 2956 | return ret_set_errno(-1, -errno); |
6509154d | 2957 | |
5fe147e9 | 2958 | if (lxc_ip_neigh_proxy(RTM_NEWNEIGH, AF_INET6, link_ifindex, &inet6dev->addr) < 0) |
596a002c | 2959 | return ret_set_errno(-1, EINVAL); |
b670016a | 2960 | |
2961 | /* IPVLAN requires a route to local-loopback to trigger l2proxy. */ | |
2962 | if (netdev->type == LXC_NET_IPVLAN) { | |
2963 | err = lxc_ipv6_dest_add(lo_ifindex, &inet6dev->addr, 128); | |
9c66dc4f CB |
2964 | if (err < 0) |
2965 | return log_error_errno(-1, -err, "Failed to add ipv6 dest \"%s\" for network device \"%s\"", bufinet6, loop_device); | |
b670016a | 2966 | } |
6509154d | 2967 | } |
2968 | ||
2969 | return 0; | |
2970 | } | |
2971 | ||
9c66dc4f CB |
2972 | static int lxc_delete_ipv4_l2proxy(struct in_addr *ip, char *link, unsigned int lo_ifindex) |
2973 | { | |
b670016a | 2974 | char bufinet4[INET_ADDRSTRLEN]; |
9c66dc4f CB |
2975 | bool had_error = false; |
2976 | unsigned int link_ifindex = 0; | |
b670016a | 2977 | |
9c66dc4f CB |
2978 | if (!inet_ntop(AF_INET, ip, bufinet4, sizeof(bufinet4))) |
2979 | return log_error_errno(-1, EINVAL, "Failed to convert IP for l2proxy ipv4 removal on dev \"%s\"", link); | |
b670016a | 2980 | |
2981 | /* If a local-loopback ifindex supplied remove the static route to the lo device. */ | |
2982 | if (lo_ifindex > 0) { | |
2983 | if (lxc_ipv4_dest_del(lo_ifindex, ip, 32) < 0) { | |
9c66dc4f | 2984 | had_error = true; |
b670016a | 2985 | ERROR("Failed to delete ipv4 dest \"%s\" for network ifindex \"%u\"", bufinet4, lo_ifindex); |
2986 | } | |
2987 | } | |
2988 | ||
2989 | /* If link is supplied remove the IP neigh proxy entry for this IP on the device. */ | |
f2711167 | 2990 | if (!is_empty_string(link)) { |
5fe147e9 | 2991 | link_ifindex = if_nametoindex(link); |
9c66dc4f CB |
2992 | if (link_ifindex == 0) |
2993 | return log_error_errno(-1, EINVAL, "Failed to retrieve ifindex for \"%s\" l2proxy cleanup", link); | |
5fe147e9 TP |
2994 | |
2995 | if (lxc_ip_neigh_proxy(RTM_DELNEIGH, AF_INET, link_ifindex, ip) < 0) | |
9c66dc4f | 2996 | had_error = true; |
b670016a | 2997 | } |
2998 | ||
9c66dc4f | 2999 | if (had_error) |
596a002c | 3000 | return ret_set_errno(-1, EINVAL); |
b670016a | 3001 | |
3002 | return 0; | |
3003 | } | |
3004 | ||
9c66dc4f CB |
3005 | static int lxc_delete_ipv6_l2proxy(struct in6_addr *ip, char *link, unsigned int lo_ifindex) |
3006 | { | |
b670016a | 3007 | char bufinet6[INET6_ADDRSTRLEN]; |
9c66dc4f CB |
3008 | bool had_error = false; |
3009 | unsigned int link_ifindex = 0; | |
b670016a | 3010 | |
9c66dc4f CB |
3011 | if (!inet_ntop(AF_INET6, ip, bufinet6, sizeof(bufinet6))) |
3012 | return log_error_errno(-1, EINVAL, "Failed to convert IP for l2proxy ipv6 removal on dev \"%s\"", link); | |
b670016a | 3013 | |
3014 | /* If a local-loopback ifindex supplied remove the static route to the lo device. */ | |
3015 | if (lo_ifindex > 0) { | |
3016 | if (lxc_ipv6_dest_del(lo_ifindex, ip, 128) < 0) { | |
9c66dc4f | 3017 | had_error = true; |
b670016a | 3018 | ERROR("Failed to delete ipv6 dest \"%s\" for network ifindex \"%u\"", bufinet6, lo_ifindex); |
3019 | } | |
3020 | } | |
3021 | ||
3022 | /* If link is supplied remove the IP neigh proxy entry for this IP on the device. */ | |
f2711167 | 3023 | if (!is_empty_string(link)) { |
5fe147e9 TP |
3024 | link_ifindex = if_nametoindex(link); |
3025 | if (link_ifindex == 0) { | |
3026 | ERROR("Failed to retrieve ifindex for \"%s\" l2proxy cleanup", link); | |
3027 | return ret_set_errno(-1, EINVAL); | |
3028 | } | |
3029 | ||
3030 | if (lxc_ip_neigh_proxy(RTM_DELNEIGH, AF_INET6, link_ifindex, ip) < 0) | |
9c66dc4f | 3031 | had_error = true; |
b670016a | 3032 | } |
3033 | ||
9c66dc4f | 3034 | if (had_error) |
596a002c | 3035 | return ret_set_errno(-1, EINVAL); |
b670016a | 3036 | |
3037 | return 0; | |
3038 | } | |
3039 | ||
6509154d | 3040 | static int lxc_delete_l2proxy(struct lxc_netdev *netdev) { |
b670016a | 3041 | unsigned int lo_ifindex = 0; |
3042 | unsigned int errCount = 0; | |
6509154d | 3043 | struct lxc_list *cur, *next; |
3044 | struct lxc_inetdev *inet4dev; | |
3045 | struct lxc_inet6dev *inet6dev; | |
6509154d | 3046 | |
b670016a | 3047 | /* Perform IPVLAN specific checks. */ |
3048 | if (netdev->type == LXC_NET_IPVLAN) { | |
3049 | /* Retrieve local-loopback interface index for use with IPVLAN static routes. */ | |
3ebffb98 | 3050 | lo_ifindex = if_nametoindex(loop_device); |
b670016a | 3051 | if (lo_ifindex == 0) { |
3052 | errCount++; | |
3ebffb98 | 3053 | ERROR("Failed to retrieve ifindex for \"%s\" routing cleanup", loop_device); |
6509154d | 3054 | } |
b670016a | 3055 | } |
6509154d | 3056 | |
b670016a | 3057 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { |
3058 | inet4dev = cur->elem; | |
3059 | if (lxc_delete_ipv4_l2proxy(&inet4dev->addr, netdev->link, lo_ifindex) < 0) | |
3060 | errCount++; | |
6509154d | 3061 | } |
3062 | ||
3063 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
3064 | inet6dev = cur->elem; | |
b670016a | 3065 | if (lxc_delete_ipv6_l2proxy(&inet6dev->addr, netdev->link, lo_ifindex) < 0) |
3066 | errCount++; | |
6509154d | 3067 | } |
3068 | ||
b670016a | 3069 | if (errCount > 0) |
596a002c | 3070 | return ret_set_errno(-1, EINVAL); |
6509154d | 3071 | |
3072 | return 0; | |
3073 | } | |
3074 | ||
e389f2af | 3075 | static int lxc_create_network_priv(struct lxc_handler *handler) |
811ef482 | 3076 | { |
811ef482 CB |
3077 | struct lxc_list *iterator; |
3078 | struct lxc_list *network = &handler->conf->network; | |
3079 | ||
811ef482 CB |
3080 | lxc_list_for_each(iterator, network) { |
3081 | struct lxc_netdev *netdev = iterator->elem; | |
3082 | ||
9c66dc4f CB |
3083 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) |
3084 | return log_error_errno(-1, EINVAL, "Invalid network configuration type %d", netdev->type); | |
811ef482 | 3085 | |
6509154d | 3086 | /* Setup l2proxy entries if enabled and used with a link property */ |
f2711167 | 3087 | if (netdev->l2proxy && !is_empty_string(netdev->link)) { |
9c66dc4f CB |
3088 | if (lxc_setup_l2proxy(netdev)) |
3089 | return log_error_errno(-1, errno, "Failed to setup l2proxy"); | |
6509154d | 3090 | } |
3091 | ||
9c66dc4f CB |
3092 | if (netdev_conf[netdev->type](handler, netdev)) |
3093 | return log_error_errno(-1, errno, "Failed to create network device"); | |
811ef482 CB |
3094 | } |
3095 | ||
3096 | return 0; | |
3097 | } | |
3098 | ||
e389f2af | 3099 | int lxc_network_move_created_netdev_priv(struct lxc_handler *handler) |
811ef482 | 3100 | { |
e389f2af CB |
3101 | pid_t pid = handler->pid; |
3102 | struct lxc_list *network = &handler->conf->network; | |
811ef482 CB |
3103 | struct lxc_list *iterator; |
3104 | ||
e0010464 | 3105 | if (am_guest_unpriv()) |
74c6e2b0 | 3106 | return 0; |
811ef482 CB |
3107 | |
3108 | lxc_list_for_each(iterator, network) { | |
3dd78294 | 3109 | __do_free char *physname = NULL; |
e389f2af | 3110 | int ret; |
811ef482 CB |
3111 | struct lxc_netdev *netdev = iterator->elem; |
3112 | ||
811ef482 CB |
3113 | if (!netdev->ifindex) |
3114 | continue; | |
3115 | ||
3dd78294 CB |
3116 | if (netdev->type == LXC_NET_PHYS) |
3117 | physname = is_wlan(netdev->link); | |
3118 | ||
3119 | if (physname) | |
3c9fdb32 | 3120 | ret = lxc_netdev_move_wlan(physname, netdev->link, pid, netdev->name); |
3dd78294 | 3121 | else |
8bf64b77 | 3122 | ret = lxc_netdev_move_by_index(netdev->ifindex, pid, netdev->name); |
9c66dc4f CB |
3123 | if (ret) |
3124 | return log_error_errno(-1, -ret, "Failed to move network device \"%s\" with ifindex %d to network namespace %d", | |
3125 | netdev->created_name, | |
3126 | netdev->ifindex, pid); | |
811ef482 | 3127 | |
24190194 CB |
3128 | DEBUG("Moved network device \"%s\" with ifindex %d to network namespace of %d", |
3129 | netdev->created_name, netdev->ifindex, pid); | |
811ef482 CB |
3130 | } |
3131 | ||
3132 | return 0; | |
3133 | } | |
3134 | ||
3c09b97c CB |
3135 | static int network_requires_advanced_setup(int type) |
3136 | { | |
3137 | if (type == LXC_NET_EMPTY) | |
3138 | return false; | |
3139 | ||
3140 | if (type == LXC_NET_NONE) | |
3141 | return false; | |
3142 | ||
3143 | return true; | |
3144 | } | |
3145 | ||
e389f2af | 3146 | static int lxc_create_network_unpriv(struct lxc_handler *handler) |
74c6e2b0 | 3147 | { |
e389f2af CB |
3148 | int hooks_version = handler->conf->hooks_version; |
3149 | const char *lxcname = handler->name; | |
3150 | const char *lxcpath = handler->lxcpath; | |
3151 | struct lxc_list *network = &handler->conf->network; | |
3152 | pid_t pid = handler->pid; | |
74c6e2b0 CB |
3153 | struct lxc_list *iterator; |
3154 | ||
74c6e2b0 CB |
3155 | lxc_list_for_each(iterator, network) { |
3156 | struct lxc_netdev *netdev = iterator->elem; | |
3157 | ||
3c09b97c | 3158 | if (!network_requires_advanced_setup(netdev->type)) |
74c6e2b0 CB |
3159 | continue; |
3160 | ||
9c66dc4f CB |
3161 | if (netdev->type != LXC_NET_VETH) |
3162 | return log_error_errno(-1, EINVAL, "Networks of type %s are not supported by unprivileged containers", | |
3163 | lxc_net_type_to_str(netdev->type)); | |
74c6e2b0 CB |
3164 | |
3165 | if (netdev->mtu) | |
3166 | INFO("mtu ignored due to insufficient privilege"); | |
3167 | ||
e389f2af CB |
3168 | if (lxc_create_network_unpriv_exec(lxcpath, lxcname, netdev, |
3169 | pid, hooks_version)) | |
74c6e2b0 CB |
3170 | return -1; |
3171 | } | |
3172 | ||
3173 | return 0; | |
3174 | } | |
3175 | ||
1bd8d726 | 3176 | bool lxc_delete_network_priv(struct lxc_handler *handler) |
811ef482 CB |
3177 | { |
3178 | int ret; | |
3179 | struct lxc_list *iterator; | |
3180 | struct lxc_list *network = &handler->conf->network; | |
1bd8d726 | 3181 | |
811ef482 CB |
3182 | lxc_list_for_each(iterator, network) { |
3183 | char *hostveth = NULL; | |
3184 | struct lxc_netdev *netdev = iterator->elem; | |
3185 | ||
3186 | /* We can only delete devices whose ifindex we have. If we don't | |
3187 | * have the index it means that we didn't create it. | |
3188 | */ | |
3189 | if (!netdev->ifindex) | |
3190 | continue; | |
3191 | ||
0104c121 CB |
3192 | /* |
3193 | * If the network device has been moved back from the | |
3194 | * containers network namespace, update the ifindex. | |
3195 | */ | |
3196 | netdev->ifindex = if_nametoindex(netdev->name); | |
3197 | ||
6509154d | 3198 | /* Delete l2proxy entries if enabled and used with a link property */ |
f2711167 | 3199 | if (netdev->l2proxy && !is_empty_string(netdev->link)) { |
6509154d | 3200 | if (lxc_delete_l2proxy(netdev)) |
3201 | WARN("Failed to delete all l2proxy config"); | |
3202 | /* Don't return, let the network be cleaned up as normal. */ | |
3203 | } | |
3204 | ||
811ef482 CB |
3205 | if (netdev->type == LXC_NET_PHYS) { |
3206 | ret = lxc_netdev_rename_by_index(netdev->ifindex, netdev->link); | |
3207 | if (ret < 0) | |
3208 | WARN("Failed to rename interface with index %d " | |
b809f232 CB |
3209 | "from \"%s\" to its initial name \"%s\"", |
3210 | netdev->ifindex, netdev->name, netdev->link); | |
0b154989 | 3211 | else { |
29589196 CB |
3212 | TRACE("Renamed interface with index %d from " |
3213 | "\"%s\" to its initial name \"%s\"", | |
3214 | netdev->ifindex, netdev->name, | |
3215 | netdev->link); | |
0b154989 TP |
3216 | |
3217 | /* Restore original MTU */ | |
3218 | ret = lxc_netdev_set_mtu(netdev->link, netdev->priv.phys_attr.mtu); | |
3219 | if (ret < 0) { | |
3220 | WARN("Failed to set interface \"%s\" to its initial mtu \"%d\"", | |
3221 | netdev->link, netdev->priv.phys_attr.mtu); | |
3222 | } else { | |
3223 | TRACE("Restored interface \"%s\" to its initial mtu \"%d\"", | |
3224 | netdev->link, netdev->priv.phys_attr.mtu); | |
3225 | } | |
3226 | } | |
b3259dc6 TP |
3227 | |
3228 | ret = netdev_deconf[netdev->type](handler, netdev); | |
66a7c406 | 3229 | goto clear_ifindices; |
811ef482 CB |
3230 | } |
3231 | ||
3232 | ret = netdev_deconf[netdev->type](handler, netdev); | |
3233 | if (ret < 0) | |
3234 | WARN("Failed to deconfigure network device"); | |
3235 | ||
811ef482 | 3236 | if (netdev->type != LXC_NET_VETH) |
66a7c406 | 3237 | goto clear_ifindices; |
811ef482 | 3238 | |
811ef482 CB |
3239 | /* Explicitly delete host veth device to prevent lingering |
3240 | * devices. We had issues in LXD around this. | |
3241 | */ | |
f2711167 | 3242 | if (!is_empty_string(netdev->priv.veth_attr.pair)) |
811ef482 CB |
3243 | hostveth = netdev->priv.veth_attr.pair; |
3244 | else | |
3245 | hostveth = netdev->priv.veth_attr.veth1; | |
f2711167 | 3246 | if (is_empty_string(hostveth)) |
66a7c406 | 3247 | goto clear_ifindices; |
811ef482 | 3248 | |
1ee56cff CB |
3249 | if (is_empty_string(netdev->link) || !is_ovs_bridge(netdev->link)) { |
3250 | ret = lxc_netdev_delete_by_name(hostveth); | |
3251 | if (ret < 0) | |
3252 | WARN("Failed to remove interface \"%s\" from \"%s\"", hostveth, netdev->link); | |
811ef482 | 3253 | |
1ee56cff CB |
3254 | INFO("Removed interface \"%s\" from \"%s\"", hostveth, netdev->link); |
3255 | } else if (!is_empty_string(netdev->link)) { | |
3256 | ret = lxc_ovs_delete_port(netdev->link, hostveth); | |
3257 | if (ret < 0) | |
3258 | WARN("Failed to remove port \"%s\" from openvswitch bridge \"%s\"", hostveth, netdev->link); | |
811ef482 | 3259 | |
1ee56cff CB |
3260 | INFO("Removed port \"%s\" from openvswitch bridge \"%s\"", hostveth, netdev->link); |
3261 | } | |
811ef482 | 3262 | |
66a7c406 | 3263 | clear_ifindices: |
ad2ddfcd | 3264 | /* We need to clear any ifindices we recorded so liblxc won't |
66a7c406 CB |
3265 | * have cached stale data which would cause it to fail on reboot |
3266 | * we're we don't re-read the on-disk config file. | |
3267 | */ | |
3268 | netdev->ifindex = 0; | |
3269 | if (netdev->type == LXC_NET_PHYS) { | |
3270 | netdev->priv.phys_attr.ifindex = 0; | |
3271 | } else if (netdev->type == LXC_NET_VETH) { | |
3272 | netdev->priv.veth_attr.veth1[0] = '\0'; | |
3273 | netdev->priv.veth_attr.ifindex = 0; | |
3274 | } | |
811ef482 CB |
3275 | } |
3276 | ||
bb84beda | 3277 | return true; |
811ef482 CB |
3278 | } |
3279 | ||
3280 | int lxc_requests_empty_network(struct lxc_handler *handler) | |
3281 | { | |
3282 | struct lxc_list *network = &handler->conf->network; | |
3283 | struct lxc_list *iterator; | |
3284 | bool found_none = false, found_nic = false; | |
3285 | ||
3286 | if (lxc_list_empty(network)) | |
3287 | return 0; | |
3288 | ||
9c66dc4f | 3289 | lxc_list_for_each (iterator, network) { |
811ef482 CB |
3290 | struct lxc_netdev *netdev = iterator->elem; |
3291 | ||
3292 | if (netdev->type == LXC_NET_NONE) | |
3293 | found_none = true; | |
3294 | else | |
3295 | found_nic = true; | |
3296 | } | |
9c66dc4f | 3297 | |
811ef482 CB |
3298 | if (found_none && !found_nic) |
3299 | return 1; | |
9c66dc4f | 3300 | |
811ef482 CB |
3301 | return 0; |
3302 | } | |
3303 | ||
3304 | /* try to move physical nics to the init netns */ | |
b809f232 | 3305 | int lxc_restore_phys_nics_to_netns(struct lxc_handler *handler) |
811ef482 | 3306 | { |
9c66dc4f CB |
3307 | __do_close int oldfd = -EBADF; |
3308 | int netnsfd = handler->nsfd[LXC_NS_NET]; | |
3309 | struct lxc_conf *conf = handler->conf; | |
811ef482 | 3310 | int ret; |
811ef482 | 3311 | char ifname[IFNAMSIZ]; |
b809f232 | 3312 | struct lxc_list *iterator; |
811ef482 | 3313 | |
b809f232 CB |
3314 | /* We need CAP_NET_ADMIN in the parent namespace in order to setns() to |
3315 | * the parent network namespace. We won't have this capability if we are | |
3316 | * unprivileged. | |
3317 | */ | |
d0fbc7ba | 3318 | if (!handler->am_root) |
b809f232 | 3319 | return 0; |
811ef482 | 3320 | |
b809f232 | 3321 | TRACE("Moving physical network devices back to parent network namespace"); |
811ef482 | 3322 | |
0037ab49 | 3323 | oldfd = lxc_preserve_ns(handler->monitor_pid, "net"); |
9c66dc4f CB |
3324 | if (oldfd < 0) |
3325 | return log_error_errno(-1, errno, "Failed to preserve network namespace"); | |
811ef482 | 3326 | |
b809f232 | 3327 | ret = setns(netnsfd, CLONE_NEWNET); |
9c66dc4f CB |
3328 | if (ret < 0) |
3329 | return log_error_errno(-1, errno, "Failed to enter network namespace"); | |
811ef482 | 3330 | |
b809f232 CB |
3331 | lxc_list_for_each(iterator, &conf->network) { |
3332 | struct lxc_netdev *netdev = iterator->elem; | |
811ef482 | 3333 | |
b809f232 CB |
3334 | if (netdev->type != LXC_NET_PHYS) |
3335 | continue; | |
3336 | ||
3337 | /* Retrieve the name of the interface in the container's network | |
3338 | * namespace. | |
3339 | */ | |
3340 | if (!if_indextoname(netdev->ifindex, ifname)) { | |
9c66dc4f | 3341 | WARN("No interface corresponding to ifindex %d", netdev->ifindex); |
811ef482 CB |
3342 | continue; |
3343 | } | |
b809f232 | 3344 | |
0037ab49 | 3345 | ret = lxc_netdev_move_by_index_fd(netdev->ifindex, oldfd, netdev->link); |
b809f232 | 3346 | if (ret < 0) |
9c66dc4f | 3347 | WARN("Error moving network device \"%s\" back to network namespace", ifname); |
b809f232 | 3348 | else |
9c66dc4f | 3349 | TRACE("Moved network device \"%s\" back to network namespace", ifname); |
811ef482 | 3350 | } |
811ef482 | 3351 | |
b809f232 | 3352 | ret = setns(oldfd, CLONE_NEWNET); |
9c66dc4f CB |
3353 | if (ret < 0) |
3354 | return log_error_errno(-1, errno, "Failed to enter network namespace"); | |
b809f232 CB |
3355 | |
3356 | return 0; | |
811ef482 CB |
3357 | } |
3358 | ||
3359 | static int setup_hw_addr(char *hwaddr, const char *ifname) | |
3360 | { | |
9c66dc4f | 3361 | __do_close int fd = -EBADF; |
811ef482 CB |
3362 | struct sockaddr sockaddr; |
3363 | struct ifreq ifr; | |
9c66dc4f | 3364 | int ret; |
811ef482 CB |
3365 | |
3366 | ret = lxc_convert_mac(hwaddr, &sockaddr); | |
9c66dc4f CB |
3367 | if (ret) |
3368 | return log_error_errno(-1, -ret, "Mac address \"%s\" conversion failed", hwaddr); | |
811ef482 CB |
3369 | |
3370 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
3371 | ifr.ifr_name[IFNAMSIZ-1] = '\0'; | |
3372 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
3373 | ||
ad9429e5 | 3374 | fd = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0); |
811ef482 CB |
3375 | if (fd < 0) |
3376 | return -1; | |
3377 | ||
3378 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
811ef482 | 3379 | if (ret) |
6d1400b5 | 3380 | SYSERROR("Failed to perform ioctl"); |
3381 | ||
9c66dc4f | 3382 | DEBUG("Mac address \"%s\" on \"%s\" has been setup", hwaddr, ifr.ifr_name); |
811ef482 CB |
3383 | |
3384 | return ret; | |
3385 | } | |
3386 | ||
3387 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) | |
3388 | { | |
3389 | struct lxc_list *iterator; | |
3390 | int err; | |
3391 | ||
3392 | lxc_list_for_each(iterator, ip) { | |
3393 | struct lxc_inetdev *inetdev = iterator->elem; | |
3394 | ||
3395 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, | |
3396 | &inetdev->bcast, inetdev->prefix); | |
9c66dc4f CB |
3397 | if (err) |
3398 | return log_error_errno(-1, -err, "Failed to setup ipv4 address for network device with ifindex %d", ifindex); | |
811ef482 CB |
3399 | } |
3400 | ||
3401 | return 0; | |
3402 | } | |
3403 | ||
3404 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) | |
3405 | { | |
3406 | struct lxc_list *iterator; | |
3407 | int err; | |
3408 | ||
3409 | lxc_list_for_each(iterator, ip) { | |
3410 | struct lxc_inet6dev *inet6dev = iterator->elem; | |
3411 | ||
3412 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, | |
3413 | &inet6dev->mcast, &inet6dev->acast, | |
3414 | inet6dev->prefix); | |
9c66dc4f CB |
3415 | if (err) |
3416 | return log_error_errno(-1, -err, "Failed to setup ipv6 address for network device with ifindex %d", ifindex); | |
811ef482 CB |
3417 | } |
3418 | ||
3419 | return 0; | |
3420 | } | |
3421 | ||
8bf64b77 | 3422 | static int lxc_network_setup_in_child_namespaces_common(struct lxc_netdev *netdev) |
811ef482 | 3423 | { |
811ef482 | 3424 | int err; |
009d6127 | 3425 | char bufinet4[INET_ADDRSTRLEN], bufinet6[INET6_ADDRSTRLEN]; |
811ef482 CB |
3426 | |
3427 | /* empty network namespace */ | |
8bf64b77 CB |
3428 | if (!netdev->ifindex && netdev->flags & IFF_UP) { |
3429 | err = lxc_netdev_up("lo"); | |
9c66dc4f CB |
3430 | if (err) |
3431 | return log_error_errno(-1, -err, "Failed to set the loopback network device up"); | |
811ef482 CB |
3432 | } |
3433 | ||
811ef482 | 3434 | /* set a mac address */ |
9c66dc4f CB |
3435 | if (netdev->hwaddr && setup_hw_addr(netdev->hwaddr, netdev->name)) |
3436 | return log_error_errno(-1, errno, "Failed to setup hw address for network device \"%s\"", netdev->name); | |
811ef482 CB |
3437 | |
3438 | /* setup ipv4 addresses on the interface */ | |
9c66dc4f CB |
3439 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) |
3440 | return log_error_errno(-1, errno, "Failed to setup ip addresses for network device \"%s\"", netdev->name); | |
811ef482 CB |
3441 | |
3442 | /* setup ipv6 addresses on the interface */ | |
9c66dc4f CB |
3443 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) |
3444 | return log_error_errno(-1, errno, "Failed to setup ipv6 addresses for network device \"%s\"", netdev->name); | |
811ef482 CB |
3445 | |
3446 | /* set the network device up */ | |
3447 | if (netdev->flags & IFF_UP) { | |
8bf64b77 | 3448 | err = lxc_netdev_up(netdev->name); |
9c66dc4f CB |
3449 | if (err) |
3450 | return log_error_errno(-1, -err, "Failed to set network device \"%s\" up", netdev->name); | |
811ef482 CB |
3451 | |
3452 | /* the network is up, make the loopback up too */ | |
3453 | err = lxc_netdev_up("lo"); | |
9c66dc4f CB |
3454 | if (err) |
3455 | return log_error_errno(-1, -err, "Failed to set the loopback network device up"); | |
811ef482 CB |
3456 | } |
3457 | ||
811ef482 | 3458 | /* setup ipv4 gateway on the interface */ |
a2f9a670 | 3459 | if (netdev->ipv4_gateway || netdev->ipv4_gateway_dev) { |
9c66dc4f CB |
3460 | if (!(netdev->flags & IFF_UP)) |
3461 | return log_error(-1, "Cannot add ipv4 gateway for network device \"%s\" when not bringing up the interface", netdev->name); | |
811ef482 | 3462 | |
9c66dc4f CB |
3463 | if (lxc_list_empty(&netdev->ipv4)) |
3464 | return log_error(-1, "Cannot add ipv4 gateway for network device \"%s\" when not assigning an address", netdev->name); | |
811ef482 | 3465 | |
a2f9a670 | 3466 | /* Setup device route if ipv4_gateway_dev is enabled */ |
3467 | if (netdev->ipv4_gateway_dev) { | |
3468 | err = lxc_ipv4_gateway_add(netdev->ifindex, NULL); | |
9c66dc4f CB |
3469 | if (err < 0) |
3470 | return log_error_errno(-1, -err, "Failed to setup ipv4 gateway to network device \"%s\"", netdev->name); | |
a2f9a670 | 3471 | } else { |
009d6127 | 3472 | /* Check the gateway address is valid */ |
3473 | if (!inet_ntop(AF_INET, netdev->ipv4_gateway, bufinet4, sizeof(bufinet4))) | |
596a002c | 3474 | return ret_set_errno(-1, errno); |
009d6127 | 3475 | |
3476 | /* Try adding a default route to the gateway address */ | |
811ef482 | 3477 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); |
009d6127 | 3478 | if (err < 0) { |
3479 | /* If adding the default route fails, this could be because the | |
3480 | * gateway address is in a different subnet to the container's address. | |
3481 | * To work around this, we try adding a static device route to the | |
3482 | * gateway address first, and then try again. | |
3483 | */ | |
a2f9a670 | 3484 | err = lxc_ipv4_dest_add(netdev->ifindex, netdev->ipv4_gateway, 32); |
9c66dc4f CB |
3485 | if (err < 0) |
3486 | return log_error_errno(-1, -err, "Failed to add ipv4 dest \"%s\" for network device \"%s\"", bufinet4, netdev->name); | |
6d1400b5 | 3487 | |
a2f9a670 | 3488 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); |
9c66dc4f CB |
3489 | if (err < 0) |
3490 | return log_error_errno(-1, -err, "Failed to setup ipv4 gateway \"%s\" for network device \"%s\"", bufinet4, netdev->name); | |
811ef482 CB |
3491 | } |
3492 | } | |
3493 | } | |
3494 | ||
3495 | /* setup ipv6 gateway on the interface */ | |
a2f9a670 | 3496 | if (netdev->ipv6_gateway || netdev->ipv6_gateway_dev) { |
9c66dc4f CB |
3497 | if (!(netdev->flags & IFF_UP)) |
3498 | return log_error(-1, "Cannot add ipv6 gateway for network device \"%s\" when not bringing up the interface", netdev->name); | |
811ef482 | 3499 | |
9c66dc4f CB |
3500 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) |
3501 | return log_error(-1, "Cannot add ipv6 gateway for network device \"%s\" when not assigning an address", netdev->name); | |
811ef482 | 3502 | |
a2f9a670 | 3503 | /* Setup device route if ipv6_gateway_dev is enabled */ |
3504 | if (netdev->ipv6_gateway_dev) { | |
3505 | err = lxc_ipv6_gateway_add(netdev->ifindex, NULL); | |
9c66dc4f CB |
3506 | if (err < 0) |
3507 | return log_error_errno(-1, -err, "Failed to setup ipv6 gateway to network device \"%s\"", netdev->name); | |
a2f9a670 | 3508 | } else { |
009d6127 | 3509 | /* Check the gateway address is valid */ |
3510 | if (!inet_ntop(AF_INET6, netdev->ipv6_gateway, bufinet6, sizeof(bufinet6))) | |
596a002c | 3511 | return ret_set_errno(-1, errno); |
009d6127 | 3512 | |
3513 | /* Try adding a default route to the gateway address */ | |
811ef482 | 3514 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); |
009d6127 | 3515 | if (err < 0) { |
3516 | /* If adding the default route fails, this could be because the | |
3517 | * gateway address is in a different subnet to the container's address. | |
3518 | * To work around this, we try adding a static device route to the | |
3519 | * gateway address first, and then try again. | |
3520 | */ | |
a2f9a670 | 3521 | err = lxc_ipv6_dest_add(netdev->ifindex, netdev->ipv6_gateway, 128); |
9c66dc4f CB |
3522 | if (err < 0) |
3523 | return log_error_errno(-1, errno, "Failed to add ipv6 dest \"%s\" for network device \"%s\"", bufinet6, netdev->name); | |
6d1400b5 | 3524 | |
a2f9a670 | 3525 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); |
9c66dc4f CB |
3526 | if (err < 0) |
3527 | return log_error_errno(-1, -err, "Failed to setup ipv6 gateway \"%s\" for network device \"%s\"", bufinet6, netdev->name); | |
811ef482 CB |
3528 | } |
3529 | } | |
3530 | } | |
3531 | ||
8bf64b77 | 3532 | DEBUG("Network device \"%s\" has been setup", netdev->name); |
811ef482 CB |
3533 | |
3534 | return 0; | |
3535 | } | |
3536 | ||
3537 | int lxc_setup_network_in_child_namespaces(const struct lxc_conf *conf, | |
3538 | struct lxc_list *network) | |
3539 | { | |
3540 | struct lxc_list *iterator; | |
811ef482 | 3541 | |
8bf64b77 | 3542 | lxc_list_for_each (iterator, network) { |
e389f2af | 3543 | struct lxc_netdev *netdev = iterator->elem; |
8bf64b77 | 3544 | int ret; |
811ef482 | 3545 | |
8bf64b77 CB |
3546 | ret = netdev_ns_conf[netdev->type](netdev); |
3547 | if (!ret) | |
3548 | ret = lxc_network_setup_in_child_namespaces_common(netdev); | |
9c66dc4f CB |
3549 | if (ret) |
3550 | return log_error_errno(-1, errno, "Failed to setup netdev"); | |
811ef482 CB |
3551 | } |
3552 | ||
3553 | if (!lxc_list_empty(network)) | |
e389f2af | 3554 | INFO("Network has been setup"); |
811ef482 CB |
3555 | |
3556 | return 0; | |
3557 | } | |
7ab1ba02 | 3558 | |
3c09b97c | 3559 | int lxc_network_send_to_child(struct lxc_handler *handler) |
7ab1ba02 CB |
3560 | { |
3561 | struct lxc_list *iterator; | |
3562 | struct lxc_list *network = &handler->conf->network; | |
3563 | int data_sock = handler->data_sock[0]; | |
3564 | ||
7ab1ba02 CB |
3565 | lxc_list_for_each(iterator, network) { |
3566 | int ret; | |
3567 | struct lxc_netdev *netdev = iterator->elem; | |
3568 | ||
3c09b97c | 3569 | if (!network_requires_advanced_setup(netdev->type)) |
7ab1ba02 CB |
3570 | continue; |
3571 | ||
7fbb15ec | 3572 | ret = lxc_send_nointr(data_sock, netdev->name, IFNAMSIZ, MSG_NOSIGNAL); |
7729f8e5 | 3573 | if (ret < 0) |
7ab1ba02 | 3574 | return -1; |
e389f2af CB |
3575 | |
3576 | ret = lxc_send_nointr(data_sock, netdev->created_name, IFNAMSIZ, MSG_NOSIGNAL); | |
3577 | if (ret < 0) | |
3578 | return -1; | |
3579 | ||
3580 | TRACE("Sent network device name \"%s\" to child", netdev->created_name); | |
7ab1ba02 CB |
3581 | } |
3582 | ||
3583 | return 0; | |
3584 | } | |
3585 | ||
3c09b97c | 3586 | int lxc_network_recv_from_parent(struct lxc_handler *handler) |
7ab1ba02 CB |
3587 | { |
3588 | struct lxc_list *iterator; | |
3589 | struct lxc_list *network = &handler->conf->network; | |
3590 | int data_sock = handler->data_sock[1]; | |
3591 | ||
7ab1ba02 CB |
3592 | lxc_list_for_each(iterator, network) { |
3593 | int ret; | |
3594 | struct lxc_netdev *netdev = iterator->elem; | |
3595 | ||
3c09b97c | 3596 | if (!network_requires_advanced_setup(netdev->type)) |
7ab1ba02 CB |
3597 | continue; |
3598 | ||
e3233f26 | 3599 | ret = lxc_recv_nointr(data_sock, netdev->name, IFNAMSIZ, 0); |
7729f8e5 | 3600 | if (ret < 0) |
7ab1ba02 | 3601 | return -1; |
e389f2af CB |
3602 | |
3603 | ret = lxc_recv_nointr(data_sock, netdev->created_name, IFNAMSIZ, 0); | |
3604 | if (ret < 0) | |
3605 | return -1; | |
54256301 | 3606 | |
e389f2af | 3607 | TRACE("Received network device name \"%s\" from parent", netdev->created_name); |
7ab1ba02 CB |
3608 | } |
3609 | ||
3610 | return 0; | |
3611 | } | |
a1ae535a CB |
3612 | |
3613 | int lxc_network_send_name_and_ifindex_to_parent(struct lxc_handler *handler) | |
3614 | { | |
3615 | struct lxc_list *iterator, *network; | |
3616 | int data_sock = handler->data_sock[0]; | |
3617 | ||
3618 | if (!handler->am_root) | |
3619 | return 0; | |
3620 | ||
3621 | network = &handler->conf->network; | |
3622 | lxc_list_for_each(iterator, network) { | |
3623 | int ret; | |
3624 | struct lxc_netdev *netdev = iterator->elem; | |
3625 | ||
3626 | /* Send network device name in the child's namespace to parent. */ | |
7fbb15ec | 3627 | ret = lxc_send_nointr(data_sock, netdev->name, IFNAMSIZ, MSG_NOSIGNAL); |
a1ae535a | 3628 | if (ret < 0) |
7729f8e5 | 3629 | return -1; |
a1ae535a CB |
3630 | |
3631 | /* Send network device ifindex in the child's namespace to | |
3632 | * parent. | |
3633 | */ | |
7fbb15ec | 3634 | ret = lxc_send_nointr(data_sock, &netdev->ifindex, sizeof(netdev->ifindex), MSG_NOSIGNAL); |
a1ae535a | 3635 | if (ret < 0) |
7729f8e5 | 3636 | return -1; |
a1ae535a CB |
3637 | } |
3638 | ||
e389f2af CB |
3639 | if (!lxc_list_empty(network)) |
3640 | TRACE("Sent network device names and ifindices to parent"); | |
3641 | ||
a1ae535a | 3642 | return 0; |
a1ae535a CB |
3643 | } |
3644 | ||
3645 | int lxc_network_recv_name_and_ifindex_from_child(struct lxc_handler *handler) | |
3646 | { | |
3647 | struct lxc_list *iterator, *network; | |
3648 | int data_sock = handler->data_sock[1]; | |
3649 | ||
3650 | if (!handler->am_root) | |
3651 | return 0; | |
3652 | ||
3653 | network = &handler->conf->network; | |
3654 | lxc_list_for_each(iterator, network) { | |
3655 | int ret; | |
3656 | struct lxc_netdev *netdev = iterator->elem; | |
3657 | ||
3658 | /* Receive network device name in the child's namespace to | |
3659 | * parent. | |
3660 | */ | |
e3233f26 | 3661 | ret = lxc_recv_nointr(data_sock, netdev->name, IFNAMSIZ, 0); |
a1ae535a | 3662 | if (ret < 0) |
7729f8e5 | 3663 | return -1; |
a1ae535a CB |
3664 | |
3665 | /* Receive network device ifindex in the child's namespace to | |
3666 | * parent. | |
3667 | */ | |
e3233f26 | 3668 | ret = lxc_recv_nointr(data_sock, &netdev->ifindex, sizeof(netdev->ifindex), 0); |
a1ae535a | 3669 | if (ret < 0) |
7729f8e5 | 3670 | return -1; |
a1ae535a CB |
3671 | } |
3672 | ||
3673 | return 0; | |
a1ae535a | 3674 | } |
bb84beda CB |
3675 | |
3676 | void lxc_delete_network(struct lxc_handler *handler) | |
3677 | { | |
3678 | bool bret; | |
3679 | ||
3680 | if (handler->am_root) | |
3681 | bret = lxc_delete_network_priv(handler); | |
3682 | else | |
3683 | bret = lxc_delete_network_unpriv(handler); | |
3684 | if (!bret) | |
3685 | DEBUG("Failed to delete network devices"); | |
3686 | else | |
3687 | DEBUG("Deleted network devices"); | |
3688 | } | |
1cd95214 | 3689 | |
1cd95214 CB |
3690 | int lxc_netns_set_nsid(int fd) |
3691 | { | |
41a3300d | 3692 | int ret; |
0ce60f0d CB |
3693 | char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + |
3694 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) + | |
3695 | NLMSG_ALIGN(1024)]; | |
1cd95214 | 3696 | struct nl_handler nlh; |
a5f5cb41 | 3697 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
0ce60f0d CB |
3698 | struct nlmsghdr *hdr; |
3699 | struct rtgenmsg *msg; | |
9d036caa CB |
3700 | const __s32 ns_id = -1; |
3701 | const __u32 netns_fd = fd; | |
1cd95214 | 3702 | |
a5f5cb41 | 3703 | ret = netlink_open(nlh_ptr, NETLINK_ROUTE); |
1cd95214 | 3704 | if (ret < 0) |
41a3300d | 3705 | return -1; |
1cd95214 | 3706 | |
0ce60f0d | 3707 | memset(buf, 0, sizeof(buf)); |
6ce39620 CB |
3708 | |
3709 | #pragma GCC diagnostic push | |
3710 | #pragma GCC diagnostic ignored "-Wcast-align" | |
0ce60f0d CB |
3711 | hdr = (struct nlmsghdr *)buf; |
3712 | msg = (struct rtgenmsg *)NLMSG_DATA(hdr); | |
6ce39620 | 3713 | #pragma GCC diagnostic pop |
1cd95214 | 3714 | |
0ce60f0d CB |
3715 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*msg)); |
3716 | hdr->nlmsg_type = RTM_NEWNSID; | |
3717 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
3718 | hdr->nlmsg_pid = 0; | |
3719 | hdr->nlmsg_seq = RTM_NEWNSID; | |
3720 | msg->rtgen_family = AF_UNSPEC; | |
1cd95214 | 3721 | |
9d036caa CB |
3722 | ret = addattr(hdr, 1024, __LXC_NETNSA_FD, &netns_fd, sizeof(netns_fd)); |
3723 | if (ret < 0) | |
a5f5cb41 | 3724 | return ret_errno(ENOMEM); |
9d036caa CB |
3725 | |
3726 | ret = addattr(hdr, 1024, __LXC_NETNSA_NSID, &ns_id, sizeof(ns_id)); | |
3727 | if (ret < 0) | |
a5f5cb41 | 3728 | return ret_errno(ENOMEM); |
1cd95214 | 3729 | |
a5f5cb41 | 3730 | return __netlink_transaction(nlh_ptr, hdr, hdr); |
1cd95214 | 3731 | } |
938980ba CB |
3732 | |
3733 | static int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len) | |
3734 | { | |
3735 | ||
3736 | memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); | |
3737 | ||
3738 | while (RTA_OK(rta, len)) { | |
3739 | unsigned short type = rta->rta_type; | |
3740 | ||
3741 | if ((type <= max) && (!tb[type])) | |
3742 | tb[type] = rta; | |
3743 | ||
6ce39620 CB |
3744 | #pragma GCC diagnostic push |
3745 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba | 3746 | rta = RTA_NEXT(rta, len); |
6ce39620 | 3747 | #pragma GCC diagnostic pop |
938980ba CB |
3748 | } |
3749 | ||
3750 | return 0; | |
3751 | } | |
3752 | ||
3753 | static inline __s32 rta_getattr_s32(const struct rtattr *rta) | |
3754 | { | |
3755 | return *(__s32 *)RTA_DATA(rta); | |
3756 | } | |
3757 | ||
3758 | #ifndef NETNS_RTA | |
3759 | #define NETNS_RTA(r) \ | |
3760 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg)))) | |
3761 | #endif | |
3762 | ||
3763 | int lxc_netns_get_nsid(int fd) | |
3764 | { | |
a5f5cb41 CB |
3765 | struct nl_handler nlh; |
3766 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
938980ba CB |
3767 | int ret; |
3768 | ssize_t len; | |
3769 | char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + | |
9d036caa CB |
3770 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) + |
3771 | NLMSG_ALIGN(1024)]; | |
938980ba | 3772 | struct rtattr *tb[__LXC_NETNSA_MAX + 1]; |
938980ba CB |
3773 | struct nlmsghdr *hdr; |
3774 | struct rtgenmsg *msg; | |
938980ba CB |
3775 | __u32 netns_fd = fd; |
3776 | ||
a5f5cb41 | 3777 | ret = netlink_open(nlh_ptr, NETLINK_ROUTE); |
938980ba CB |
3778 | if (ret < 0) |
3779 | return -1; | |
3780 | ||
3781 | memset(buf, 0, sizeof(buf)); | |
6ce39620 CB |
3782 | |
3783 | #pragma GCC diagnostic push | |
3784 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba CB |
3785 | hdr = (struct nlmsghdr *)buf; |
3786 | msg = (struct rtgenmsg *)NLMSG_DATA(hdr); | |
6ce39620 | 3787 | #pragma GCC diagnostic pop |
938980ba CB |
3788 | |
3789 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*msg)); | |
3790 | hdr->nlmsg_type = RTM_GETNSID; | |
3791 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
3792 | hdr->nlmsg_pid = 0; | |
3793 | hdr->nlmsg_seq = RTM_GETNSID; | |
3794 | msg->rtgen_family = AF_UNSPEC; | |
3795 | ||
9d036caa | 3796 | ret = addattr(hdr, 1024, __LXC_NETNSA_FD, &netns_fd, sizeof(netns_fd)); |
a5f5cb41 CB |
3797 | if (ret < 0) |
3798 | return ret_errno(ENOMEM); | |
938980ba | 3799 | |
a5f5cb41 | 3800 | ret = __netlink_transaction(nlh_ptr, hdr, hdr); |
938980ba CB |
3801 | if (ret < 0) |
3802 | return -1; | |
3803 | ||
3804 | msg = NLMSG_DATA(hdr); | |
3805 | len = hdr->nlmsg_len - NLMSG_SPACE(sizeof(*msg)); | |
3806 | if (len < 0) | |
a5f5cb41 | 3807 | return ret_errno(EINVAL); |
938980ba | 3808 | |
6ce39620 CB |
3809 | #pragma GCC diagnostic push |
3810 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba CB |
3811 | parse_rtattr(tb, __LXC_NETNSA_MAX, NETNS_RTA(msg), len); |
3812 | if (tb[__LXC_NETNSA_NSID]) | |
3813 | return rta_getattr_s32(tb[__LXC_NETNSA_NSID]); | |
6ce39620 | 3814 | #pragma GCC diagnostic pop |
938980ba CB |
3815 | |
3816 | return -1; | |
3817 | } | |
e389f2af CB |
3818 | |
3819 | int lxc_create_network(struct lxc_handler *handler) | |
3820 | { | |
3821 | int ret; | |
3822 | ||
e389f2af CB |
3823 | if (handler->am_root) { |
3824 | ret = lxc_create_network_priv(handler); | |
3825 | if (ret) | |
3826 | return -1; | |
3827 | ||
3828 | return lxc_network_move_created_netdev_priv(handler); | |
3829 | } | |
3830 | ||
3831 | return lxc_create_network_unpriv(handler); | |
3832 | } |