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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" | |
f40988c7 | 39 | #include "process_utils.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 | ||
5fe147e9 | 185 | static int lxc_ip_neigh_proxy(__u16 nlmsg_type, int family, int ifindex, void *dest) |
6dfa9581 | 186 | { |
d16bda44 | 187 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
5fe147e9 | 188 | struct nl_handler nlh; |
d16bda44 CB |
189 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
190 | int addrlen, err; | |
5fe147e9 | 191 | struct ndmsg *rt; |
6dfa9581 | 192 | |
5fe147e9 | 193 | addrlen = family == AF_INET ? sizeof(struct in_addr) : sizeof(struct in6_addr); |
6dfa9581 | 194 | |
d16bda44 | 195 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
5fe147e9 TP |
196 | if (err) |
197 | return err; | |
6dfa9581 | 198 | |
5fe147e9 TP |
199 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
200 | if (!nlmsg) | |
d16bda44 | 201 | return -ENOMEM; |
6dfa9581 | 202 | |
5fe147e9 TP |
203 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
204 | if (!answer) | |
d16bda44 | 205 | return -ENOMEM; |
6dfa9581 | 206 | |
5fe147e9 TP |
207 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
208 | nlmsg->nlmsghdr->nlmsg_type = nlmsg_type; | |
6dfa9581 | 209 | |
5fe147e9 TP |
210 | rt = nlmsg_reserve(nlmsg, sizeof(struct ndmsg)); |
211 | if (!rt) | |
d16bda44 CB |
212 | return -ENOMEM; |
213 | ||
5fe147e9 TP |
214 | rt->ndm_ifindex = ifindex; |
215 | rt->ndm_flags = NTF_PROXY; | |
216 | rt->ndm_type = NDA_DST; | |
217 | rt->ndm_family = family; | |
6dfa9581 | 218 | |
5fe147e9 | 219 | if (nla_put_buffer(nlmsg, NDA_DST, dest, addrlen)) |
d16bda44 | 220 | return -EINVAL; |
6dfa9581 | 221 | |
d16bda44 | 222 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
6dfa9581 TP |
223 | } |
224 | ||
225 | static int lxc_is_ip_forwarding_enabled(const char *ifname, int family) | |
226 | { | |
227 | int ret; | |
228 | char path[PATH_MAX]; | |
229 | char buf[1] = ""; | |
230 | ||
231 | if (family != AF_INET && family != AF_INET6) | |
596a002c | 232 | return ret_set_errno(-1, EINVAL); |
6dfa9581 | 233 | |
9c66dc4f | 234 | ret = snprintf(path, sizeof(path), "/proc/sys/net/%s/conf/%s/%s", |
6dfa9581 TP |
235 | family == AF_INET ? "ipv4" : "ipv6", ifname, |
236 | "forwarding"); | |
9c66dc4f | 237 | if (ret < 0 || (size_t)ret >= sizeof(path)) |
596a002c | 238 | return ret_set_errno(-1, E2BIG); |
6dfa9581 TP |
239 | |
240 | return lxc_read_file_expect(path, buf, 1, "1"); | |
241 | } | |
242 | ||
622f05c7 TP |
243 | struct bridge_vlan_info { |
244 | __u16 flags; | |
245 | __u16 vid; | |
246 | }; | |
247 | ||
248 | static int lxc_bridge_vlan(unsigned int ifindex, unsigned short operation, unsigned short vlan_id, bool tagged) | |
249 | { | |
250 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; | |
251 | struct nl_handler nlh; | |
252 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
253 | int err; | |
254 | struct ifinfomsg *ifi; | |
255 | struct rtattr *nest; | |
256 | unsigned short bridge_flags = 0; | |
257 | struct bridge_vlan_info vlan_info; | |
258 | ||
259 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); | |
260 | if (err) | |
261 | return err; | |
262 | ||
263 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
264 | if (!nlmsg) | |
265 | return ret_errno(ENOMEM); | |
266 | ||
267 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); | |
268 | if (!answer) | |
269 | return ret_errno(ENOMEM); | |
270 | ||
271 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
272 | nlmsg->nlmsghdr->nlmsg_type = operation; | |
273 | ||
274 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
275 | if (!ifi) | |
276 | return ret_errno(ENOMEM); | |
277 | ifi->ifi_family = AF_BRIDGE; | |
278 | ifi->ifi_index = ifindex; | |
279 | ||
280 | nest = nla_begin_nested(nlmsg, IFLA_AF_SPEC); | |
281 | if (!nest) | |
282 | return ret_errno(ENOMEM); | |
283 | ||
284 | bridge_flags |= BRIDGE_FLAGS_MASTER; | |
285 | if (nla_put_u16(nlmsg, IFLA_BRIDGE_FLAGS, bridge_flags)) | |
286 | return ret_errno(ENOMEM); | |
287 | ||
288 | vlan_info.vid = vlan_id; | |
289 | vlan_info.flags = 0; | |
290 | if (!tagged) | |
291 | vlan_info.flags = BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED; | |
292 | ||
293 | if (nla_put_buffer(nlmsg, IFLA_BRIDGE_VLAN_INFO, &vlan_info, sizeof(struct bridge_vlan_info))) | |
294 | return ret_errno(ENOMEM); | |
295 | ||
296 | nla_end_nested(nlmsg, nest); | |
297 | ||
298 | return netlink_transaction(nlh_ptr, nlmsg, answer); | |
299 | } | |
300 | ||
301 | static int lxc_bridge_vlan_add(unsigned int ifindex, unsigned short vlan_id, bool tagged) | |
302 | { | |
303 | return lxc_bridge_vlan(ifindex, RTM_SETLINK, vlan_id, tagged); | |
304 | } | |
305 | ||
306 | static int lxc_bridge_vlan_del(unsigned int ifindex, unsigned short vlan_id) | |
307 | { | |
308 | return lxc_bridge_vlan(ifindex, RTM_DELLINK, vlan_id, false); | |
309 | } | |
310 | ||
311 | static int lxc_bridge_vlan_add_tagged(unsigned int ifindex, struct lxc_list *vlan_ids) | |
312 | { | |
313 | struct lxc_list *iterator; | |
314 | int err; | |
315 | ||
316 | lxc_list_for_each(iterator, vlan_ids) { | |
317 | unsigned short vlan_id = PTR_TO_USHORT(iterator->elem); | |
318 | ||
319 | err = lxc_bridge_vlan_add(ifindex, vlan_id, true); | |
320 | if (err) | |
321 | return log_error_errno(-1, -err, "Failed to add tagged vlan \"%u\" to ifindex \"%d\"", vlan_id, ifindex); | |
322 | } | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
33320936 TP |
327 | static int validate_veth(struct lxc_netdev *netdev) |
328 | { | |
329 | if (netdev->priv.veth_attr.mode != VETH_MODE_BRIDGE || is_empty_string(netdev->link)) { | |
330 | /* Check that veth.vlan.id isn't being used in non bridge veth.mode. */ | |
331 | if (netdev->priv.veth_attr.vlan_id_set) | |
332 | return log_error_errno(-1, EINVAL, "Cannot use veth vlan.id when not in bridge mode or no bridge link specified"); | |
333 | ||
334 | /* Check that veth.vlan.tagged.id isn't being used in non bridge veth.mode. */ | |
335 | if (lxc_list_len(&netdev->priv.veth_attr.vlan_tagged_ids) > 0) | |
336 | return log_error_errno(-1, EINVAL, "Cannot use veth vlan.id when not in bridge mode or no bridge link specified"); | |
337 | } | |
338 | ||
339 | if (netdev->priv.veth_attr.vlan_id_set) { | |
340 | struct lxc_list *it; | |
341 | lxc_list_for_each(it, &netdev->priv.veth_attr.vlan_tagged_ids) { | |
342 | unsigned short i = PTR_TO_USHORT(it->elem); | |
343 | if (i == netdev->priv.veth_attr.vlan_id) | |
344 | return log_error_errno(-1, EINVAL, "Cannot use same veth vlan.id \"%u\" in vlan.tagged.id", netdev->priv.veth_attr.vlan_id); | |
345 | } | |
346 | } | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | static int setup_veth_native_bridge_vlan(char *veth1, struct lxc_netdev *netdev) | |
352 | { | |
353 | int err, rc, veth1index; | |
354 | char path[STRLITERALLEN("/sys/class/net//bridge/vlan_filtering") + IFNAMSIZ + 1]; | |
355 | char buf[5]; /* Sufficient size to fit max VLAN ID (4094) and null char. */ | |
356 | ||
357 | /* Skip setup if no VLAN options are specified. */ | |
358 | if (!netdev->priv.veth_attr.vlan_id_set && lxc_list_len(&netdev->priv.veth_attr.vlan_tagged_ids) <= 0) | |
359 | return 0; | |
360 | ||
361 | /* Check vlan filtering is enabled on parent bridge. */ | |
362 | rc = snprintf(path, sizeof(path), "/sys/class/net/%s/bridge/vlan_filtering", netdev->link); | |
363 | if (rc < 0 || (size_t)rc >= sizeof(path)) | |
364 | return -1; | |
365 | ||
366 | rc = lxc_read_from_file(path, buf, sizeof(buf)); | |
367 | if (rc < 0) | |
368 | return log_error_errno(rc, errno, "Failed reading from \"%s\"", path); | |
369 | ||
370 | buf[rc - 1] = '\0'; | |
371 | ||
372 | if (strcmp(buf, "1") != 0) | |
373 | return log_error_errno(-1, EPERM, "vlan_filtering is not enabled on \"%s\"", netdev->link); | |
374 | ||
375 | /* Get veth1 ifindex for use with netlink. */ | |
376 | veth1index = if_nametoindex(veth1); | |
377 | if (!veth1index) | |
378 | return log_error_errno(-1, errno, "Failed getting ifindex of \"%s\"", netdev->link); | |
379 | ||
380 | /* Configure untagged VLAN settings on bridge port if specified. */ | |
381 | if (netdev->priv.veth_attr.vlan_id_set) { | |
382 | unsigned short default_pvid; | |
383 | ||
384 | /* Get the bridge's default VLAN PVID. */ | |
385 | rc = snprintf(path, sizeof(path), "/sys/class/net/%s/bridge/default_pvid", netdev->link); | |
386 | if (rc < 0 || (size_t)rc >= sizeof(path)) | |
387 | return -1; | |
388 | ||
389 | rc = lxc_read_from_file(path, buf, sizeof(buf)); | |
390 | if (rc < 0) | |
391 | return log_error_errno(rc, errno, "Failed reading from \"%s\"", path); | |
392 | ||
393 | buf[rc - 1] = '\0'; | |
394 | err = get_u16(&default_pvid, buf, 0); | |
395 | if (err) | |
396 | return log_error_errno(-1, EINVAL, "Failed parsing default_pvid of \"%s\"", netdev->link); | |
397 | ||
398 | /* If the default PVID on the port is not the specified untagged VLAN, then delete it. */ | |
399 | if (default_pvid != netdev->priv.veth_attr.vlan_id) { | |
400 | err = lxc_bridge_vlan_del(veth1index, default_pvid); | |
401 | if (err) | |
402 | return log_error_errno(err, errno, "Failed to delete default untagged vlan \"%u\" on \"%s\"", default_pvid, veth1); | |
403 | } | |
404 | ||
405 | if (netdev->priv.veth_attr.vlan_id > BRIDGE_VLAN_NONE) { | |
406 | err = lxc_bridge_vlan_add(veth1index, netdev->priv.veth_attr.vlan_id, false); | |
407 | if (err) | |
408 | return log_error_errno(err, errno, "Failed to add untagged vlan \"%u\" on \"%s\"", netdev->priv.veth_attr.vlan_id, veth1); | |
409 | } | |
410 | } | |
411 | ||
412 | /* Configure tagged VLAN settings on bridge port if specified. */ | |
413 | err = lxc_bridge_vlan_add_tagged(veth1index, &netdev->priv.veth_attr.vlan_tagged_ids); | |
414 | if (err) | |
415 | return log_error_errno(err, errno, "Failed to add tagged vlans on \"%s\"", veth1); | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
8f7c3358 TP |
420 | struct ovs_veth_vlan_args { |
421 | const char *nic; | |
422 | const char *vlan_mode; /* Port VLAN mode. */ | |
423 | short vlan_id; /* PVID VLAN ID. */ | |
d2f8b272 | 424 | char *trunks; /* Comma delimited list of tagged VLAN IDs. */ |
8f7c3358 TP |
425 | }; |
426 | ||
d2f8b272 TP |
427 | static inline void free_ovs_veth_vlan_args(struct ovs_veth_vlan_args *args) |
428 | { | |
429 | free_disarm(args->trunks); | |
430 | } | |
8f7c3358 TP |
431 | |
432 | static int lxc_ovs_setup_bridge_vlan_exec(void *data) | |
433 | { | |
434 | struct ovs_veth_vlan_args *args = data; | |
785e1540 TP |
435 | __do_free char *vlan_mode = NULL, *tag = NULL, *trunks = NULL; |
436 | ||
437 | if (!args->vlan_mode) | |
438 | return ret_errno(EINVAL); | |
8f7c3358 TP |
439 | |
440 | vlan_mode = must_concat(NULL, "vlan_mode=", args->vlan_mode, (char *)NULL); | |
441 | ||
785e1540 | 442 | if (args->vlan_id > BRIDGE_VLAN_NONE) { |
8f7c3358 TP |
443 | char buf[5]; |
444 | int rc; | |
445 | ||
446 | rc = snprintf(buf, sizeof(buf), "%u", args->vlan_id); | |
447 | if (rc < 0 || (size_t)rc >= sizeof(buf)) | |
72e8122b | 448 | return log_error_errno(-1, EINVAL, "Failed to parse ovs bridge vlan \"%d\"", args->vlan_id); |
8f7c3358 TP |
449 | |
450 | tag = must_concat(NULL, "tag=", buf, (char *)NULL); | |
451 | } | |
452 | ||
785e1540 | 453 | if (args->trunks) |
8f7c3358 TP |
454 | trunks = must_concat(NULL, "trunks=", args->trunks, (char *)NULL); |
455 | ||
456 | /* Detect the combination of vlan_id and trunks specified and convert to ovs-vsctl command. */ | |
785e1540 | 457 | if (tag && trunks) |
8f7c3358 | 458 | execlp("ovs-vsctl", "ovs-vsctl", "set", "port", args->nic, vlan_mode, tag, trunks, (char *)NULL); |
785e1540 | 459 | else if (tag) |
8f7c3358 | 460 | execlp("ovs-vsctl", "ovs-vsctl", "set", "port", args->nic, vlan_mode, tag, (char *)NULL); |
785e1540 | 461 | else if (trunks) |
8f7c3358 TP |
462 | execlp("ovs-vsctl", "ovs-vsctl", "set", "port", args->nic, vlan_mode, trunks, (char *)NULL); |
463 | else | |
464 | return -EINVAL; | |
465 | ||
466 | return -errno; | |
467 | } | |
468 | ||
469 | static int setup_veth_ovs_bridge_vlan(char *veth1, struct lxc_netdev *netdev) | |
470 | { | |
471 | int taggedLength = lxc_list_len(&netdev->priv.veth_attr.vlan_tagged_ids); | |
472 | struct ovs_veth_vlan_args args; | |
473 | args.nic = veth1; | |
1ee07848 TP |
474 | args.vlan_mode = NULL; |
475 | args.vlan_id = BRIDGE_VLAN_NONE; | |
476 | args.trunks = NULL; | |
8f7c3358 TP |
477 | |
478 | /* Skip setup if no VLAN options are specified. */ | |
479 | if (!netdev->priv.veth_attr.vlan_id_set && taggedLength <= 0) | |
480 | return 0; | |
481 | ||
482 | /* Configure untagged VLAN settings on bridge port if specified. */ | |
483 | if (netdev->priv.veth_attr.vlan_id_set) { | |
484 | if (netdev->priv.veth_attr.vlan_id == BRIDGE_VLAN_NONE && taggedLength <= 0) | |
485 | return log_error_errno(-1, EINVAL, "Cannot use vlan.id=none with openvswitch bridges when not using vlan.tagged.id"); | |
486 | ||
487 | /* Configure the untagged 'native' membership settings of the port if VLAN ID specified. | |
488 | * Also set the vlan_mode=access, which will drop any tagged frames. | |
489 | * Order is important here, as vlan_mode is set to "access", assuming that vlan.tagged.id is not | |
490 | * used. If vlan.tagged.id is specified, then we expect it to also change the vlan_mode as needed. | |
491 | */ | |
492 | if (netdev->priv.veth_attr.vlan_id > BRIDGE_VLAN_NONE) { | |
493 | args.vlan_mode = "access"; | |
494 | args.vlan_id = netdev->priv.veth_attr.vlan_id; | |
495 | } | |
496 | } | |
497 | ||
498 | if (taggedLength > 0) { | |
499 | args.vlan_mode = "trunk"; /* Default to only allowing tagged frames (drop untagged frames). */ | |
500 | ||
501 | if (netdev->priv.veth_attr.vlan_id > BRIDGE_VLAN_NONE) { | |
502 | /* If untagged vlan mode isn't "none" then allow untagged frames for port's 'native' VLAN. */ | |
503 | args.vlan_mode = "native-untagged"; | |
504 | } | |
505 | ||
506 | struct lxc_list *iterator; | |
507 | lxc_list_for_each(iterator, &netdev->priv.veth_attr.vlan_tagged_ids) { | |
508 | unsigned short vlan_id = PTR_TO_USHORT(iterator->elem); | |
509 | char buf[5]; /* Sufficient size to fit max VLAN ID (4094) null char. */ | |
510 | int rc; | |
511 | ||
512 | rc = snprintf(buf, sizeof(buf), "%u", vlan_id); | |
3fe6b5cf TP |
513 | if (rc < 0 || (size_t)rc >= sizeof(buf)) { |
514 | free_ovs_veth_vlan_args(&args); | |
8f7c3358 | 515 | return log_error_errno(-1, EINVAL, "Failed to parse tagged vlan \"%u\" for interface \"%s\"", vlan_id, veth1); |
3fe6b5cf | 516 | } |
8f7c3358 | 517 | |
1ee07848 TP |
518 | if (args.trunks) |
519 | args.trunks = must_concat(NULL, args.trunks, buf, ",", (char *)NULL); | |
520 | else | |
521 | args.trunks = must_concat(NULL, buf, ",", (char *)NULL); | |
8f7c3358 TP |
522 | } |
523 | } | |
524 | ||
1ee07848 | 525 | if (args.vlan_mode) { |
8f7c3358 TP |
526 | int ret; |
527 | char cmd_output[PATH_MAX]; | |
528 | ||
529 | ret = run_command(cmd_output, sizeof(cmd_output), lxc_ovs_setup_bridge_vlan_exec, (void *)&args); | |
3fe6b5cf TP |
530 | if (ret < 0) { |
531 | free_ovs_veth_vlan_args(&args); | |
8f7c3358 | 532 | return log_error_errno(-1, ret, "Failed to setup openvswitch vlan on port \"%s\": %s", args.nic, cmd_output); |
3fe6b5cf | 533 | } |
8f7c3358 TP |
534 | } |
535 | ||
3fe6b5cf | 536 | free_ovs_veth_vlan_args(&args); |
8f7c3358 TP |
537 | return 0; |
538 | } | |
539 | ||
811ef482 CB |
540 | static int instantiate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
541 | { | |
54256301 | 542 | int err; |
a00fbab5 | 543 | unsigned int mtu = 1500; |
811ef482 CB |
544 | char *veth1, *veth2; |
545 | char veth1buf[IFNAMSIZ], veth2buf[IFNAMSIZ]; | |
811ef482 | 546 | |
33320936 TP |
547 | err = validate_veth(netdev); |
548 | if (err) | |
549 | return err; | |
550 | ||
f2711167 | 551 | if (!is_empty_string(netdev->priv.veth_attr.pair)) { |
811ef482 CB |
552 | veth1 = netdev->priv.veth_attr.pair; |
553 | if (handler->conf->reboot) | |
554 | lxc_netdev_delete_by_name(veth1); | |
555 | } else { | |
556 | err = snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); | |
557 | if (err < 0 || (size_t)err >= sizeof(veth1buf)) | |
558 | return -1; | |
559 | ||
3646ffd9 | 560 | veth1 = lxc_ifname_alnum_case_sensitive(veth1buf); |
811ef482 CB |
561 | if (!veth1) |
562 | return -1; | |
563 | ||
564 | /* store away for deconf */ | |
565 | memcpy(netdev->priv.veth_attr.veth1, veth1, IFNAMSIZ); | |
566 | } | |
567 | ||
d34212ad CB |
568 | err = snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
569 | if (err < 0 || (size_t)err >= sizeof(veth2buf)) | |
570 | return -1; | |
571 | ||
3646ffd9 | 572 | veth2 = lxc_ifname_alnum_case_sensitive(veth2buf); |
811ef482 | 573 | if (!veth2) |
54256301 CB |
574 | return -1; |
575 | ||
a00fbab5 TP |
576 | /* if mtu is specified in config then use that, otherwise inherit from link device if provided. */ |
577 | if (netdev->mtu) { | |
578 | if (lxc_safe_uint(netdev->mtu, &mtu)) | |
579 | return log_error_errno(-1, errno, "Failed to parse mtu"); | |
f2711167 | 580 | } else if (!is_empty_string(netdev->link)) { |
54256301 | 581 | int ifindex_mtu; |
811ef482 | 582 | |
54256301 CB |
583 | ifindex_mtu = if_nametoindex(netdev->link); |
584 | if (ifindex_mtu) { | |
585 | mtu = netdev_get_mtu(ifindex_mtu); | |
586 | INFO("Retrieved mtu %d from %s", mtu, netdev->link); | |
587 | } | |
588 | } | |
589 | ||
590 | err = lxc_veth_create(veth1, veth2, handler->pid, mtu); | |
9c66dc4f CB |
591 | if (err) |
592 | return log_error_errno(-1, -err, "Failed to create veth pair \"%s\" and \"%s\"", veth1, veth2); | |
811ef482 | 593 | |
24190194 CB |
594 | strlcpy(netdev->created_name, veth2, IFNAMSIZ); |
595 | ||
811ef482 CB |
596 | /* changing the high byte of the mac address to 0xfe, the bridge interface |
597 | * will always keep the host's mac address and not take the mac address | |
598 | * of a container */ | |
599 | err = setup_private_host_hw_addr(veth1); | |
600 | if (err) { | |
6d1400b5 | 601 | errno = -err; |
602 | SYSERROR("Failed to change mac address of host interface \"%s\"", veth1); | |
811ef482 CB |
603 | goto out_delete; |
604 | } | |
605 | ||
8da62485 CB |
606 | /* Retrieve ifindex of the host's veth device. */ |
607 | netdev->priv.veth_attr.ifindex = if_nametoindex(veth1); | |
608 | if (!netdev->priv.veth_attr.ifindex) { | |
609 | ERROR("Failed to retrieve ifindex for \"%s\"", veth1); | |
610 | goto out_delete; | |
611 | } | |
612 | ||
811ef482 CB |
613 | if (mtu) { |
614 | err = lxc_netdev_set_mtu(veth1, mtu); | |
811ef482 | 615 | if (err) { |
6d1400b5 | 616 | errno = -err; |
54256301 | 617 | SYSERROR("Failed to set mtu \"%d\" for veth pair \"%s\" ", mtu, veth1); |
811ef482 CB |
618 | goto out_delete; |
619 | } | |
620 | } | |
621 | ||
f2711167 | 622 | if (!is_empty_string(netdev->link) && netdev->priv.veth_attr.mode == VETH_MODE_BRIDGE) { |
26da53c3 TP |
623 | if (!lxc_nic_exists(netdev->link)) { |
624 | SYSERROR("Failed to attach \"%s\" to bridge \"%s\", bridge interface doesn't exist", veth1, netdev->link); | |
625 | goto out_delete; | |
626 | } | |
627 | ||
811ef482 CB |
628 | err = lxc_bridge_attach(netdev->link, veth1); |
629 | if (err) { | |
6d1400b5 | 630 | errno = -err; |
26da53c3 | 631 | SYSERROR("Failed to attach \"%s\" to bridge \"%s\"", veth1, netdev->link); |
811ef482 CB |
632 | goto out_delete; |
633 | } | |
634 | INFO("Attached \"%s\" to bridge \"%s\"", veth1, netdev->link); | |
33320936 | 635 | |
38790036 TP |
636 | if (is_ovs_bridge(netdev->link)) { |
637 | err = setup_veth_ovs_bridge_vlan(veth1, netdev); | |
638 | if (err) { | |
639 | SYSERROR("Failed to setup openvswitch bridge vlan on \"%s\"", veth1); | |
640 | lxc_ovs_delete_port(netdev->link, veth1); | |
641 | goto out_delete; | |
642 | } | |
643 | } else { | |
33320936 TP |
644 | err = setup_veth_native_bridge_vlan(veth1, netdev); |
645 | if (err) { | |
646 | SYSERROR("Failed to setup native bridge vlan on \"%s\"", veth1); | |
647 | goto out_delete; | |
648 | } | |
649 | } | |
811ef482 CB |
650 | } |
651 | ||
652 | err = lxc_netdev_up(veth1); | |
653 | if (err) { | |
6d1400b5 | 654 | errno = -err; |
655 | SYSERROR("Failed to set \"%s\" up", veth1); | |
811ef482 CB |
656 | goto out_delete; |
657 | } | |
658 | ||
d4a7da46 | 659 | /* setup ipv4 routes on the host interface */ |
660 | if (lxc_setup_ipv4_routes(&netdev->priv.veth_attr.ipv4_routes, netdev->priv.veth_attr.ifindex)) { | |
661 | ERROR("Failed to setup ipv4 routes for network device \"%s\"", veth1); | |
662 | goto out_delete; | |
663 | } | |
664 | ||
665 | /* setup ipv6 routes on the host interface */ | |
666 | if (lxc_setup_ipv6_routes(&netdev->priv.veth_attr.ipv6_routes, netdev->priv.veth_attr.ifindex)) { | |
667 | ERROR("Failed to setup ipv6 routes for network device \"%s\"", veth1); | |
668 | goto out_delete; | |
669 | } | |
670 | ||
6dfa9581 | 671 | if (netdev->priv.veth_attr.mode == VETH_MODE_ROUTER) { |
954e36b4 TP |
672 | /* sleep for a short period of time to work around a bug that intermittently prevents IP neighbour |
673 | proxy entries from being added using lxc_ip_neigh_proxy below. When the issue occurs the entries | |
674 | appear to be added successfully but then do not appear in the proxy list. The length of time | |
675 | slept doesn't appear to be important, only that the process sleeps for a short period of time. | |
676 | */ | |
677 | nanosleep((const struct timespec[]){{0, 1000}}, NULL); | |
678 | ||
6dfa9581 TP |
679 | if (netdev->ipv4_gateway) { |
680 | char bufinet4[INET_ADDRSTRLEN]; | |
681 | if (!inet_ntop(AF_INET, netdev->ipv4_gateway, bufinet4, sizeof(bufinet4))) { | |
9c66dc4f | 682 | SYSERROR("Failed to convert gateway ipv4 address on \"%s\"", veth1); |
6dfa9581 TP |
683 | goto out_delete; |
684 | } | |
685 | ||
686 | err = lxc_ip_forwarding_on(veth1, AF_INET); | |
687 | if (err) { | |
9c66dc4f | 688 | SYSERROR("Failed to activate ipv4 forwarding on \"%s\"", veth1); |
6dfa9581 TP |
689 | goto out_delete; |
690 | } | |
691 | ||
5fe147e9 | 692 | err = lxc_ip_neigh_proxy(RTM_NEWNEIGH, AF_INET, netdev->priv.veth_attr.ifindex, netdev->ipv4_gateway); |
6dfa9581 | 693 | if (err) { |
9c66dc4f | 694 | SYSERROR("Failed to add gateway ipv4 proxy on \"%s\"", veth1); |
6dfa9581 TP |
695 | goto out_delete; |
696 | } | |
697 | } | |
698 | ||
699 | if (netdev->ipv6_gateway) { | |
700 | char bufinet6[INET6_ADDRSTRLEN]; | |
701 | ||
702 | if (!inet_ntop(AF_INET6, netdev->ipv6_gateway, bufinet6, sizeof(bufinet6))) { | |
9c66dc4f | 703 | SYSERROR("Failed to convert gateway ipv6 address on \"%s\"", veth1); |
6dfa9581 TP |
704 | goto out_delete; |
705 | } | |
706 | ||
707 | /* Check for sysctl net.ipv6.conf.all.forwarding=1 | |
708 | Kernel requires this to route any packets for IPv6. | |
709 | */ | |
710 | err = lxc_is_ip_forwarding_enabled("all", AF_INET6); | |
711 | if (err) { | |
9c66dc4f | 712 | SYSERROR("Requires sysctl net.ipv6.conf.all.forwarding=1"); |
6dfa9581 TP |
713 | goto out_delete; |
714 | } | |
715 | ||
716 | err = lxc_ip_forwarding_on(veth1, AF_INET6); | |
717 | if (err) { | |
9c66dc4f | 718 | SYSERROR("Failed to activate ipv6 forwarding on \"%s\"", veth1); |
6dfa9581 TP |
719 | goto out_delete; |
720 | } | |
721 | ||
722 | err = lxc_neigh_proxy_on(veth1, AF_INET6); | |
723 | if (err) { | |
9c66dc4f | 724 | SYSERROR("Failed to activate proxy ndp on \"%s\"", veth1); |
6dfa9581 TP |
725 | goto out_delete; |
726 | } | |
727 | ||
5fe147e9 | 728 | err = lxc_ip_neigh_proxy(RTM_NEWNEIGH, AF_INET6, netdev->priv.veth_attr.ifindex, netdev->ipv6_gateway); |
6dfa9581 | 729 | if (err) { |
9c66dc4f | 730 | SYSERROR("Failed to add gateway ipv6 proxy on \"%s\"", veth1); |
6dfa9581 TP |
731 | goto out_delete; |
732 | } | |
733 | } | |
734 | ||
735 | /* setup ipv4 address routes on the host interface */ | |
736 | err = setup_ipv4_addr_routes(&netdev->ipv4, netdev->priv.veth_attr.ifindex); | |
737 | if (err) { | |
9c66dc4f | 738 | SYSERROR("Failed to setup ip address routes for network device \"%s\"", veth1); |
6dfa9581 TP |
739 | goto out_delete; |
740 | } | |
741 | ||
742 | /* setup ipv6 address routes on the host interface */ | |
743 | err = setup_ipv6_addr_routes(&netdev->ipv6, netdev->priv.veth_attr.ifindex); | |
744 | if (err) { | |
9c66dc4f | 745 | SYSERROR("Failed to setup ip address routes for network device \"%s\"", veth1); |
6dfa9581 TP |
746 | goto out_delete; |
747 | } | |
748 | } | |
749 | ||
811ef482 | 750 | if (netdev->upscript) { |
14a7b0f9 CB |
751 | char *argv[] = { |
752 | "veth", | |
753 | netdev->link, | |
990b9ac3 | 754 | veth1, |
14a7b0f9 CB |
755 | NULL, |
756 | }; | |
757 | ||
758 | err = run_script_argv(handler->name, | |
759 | handler->conf->hooks_version, "net", | |
760 | netdev->upscript, "up", argv); | |
761 | if (err < 0) | |
811ef482 CB |
762 | goto out_delete; |
763 | } | |
764 | ||
54256301 | 765 | DEBUG("Instantiated veth tunnel \"%s <--> %s\"", veth1, veth2); |
811ef482 CB |
766 | |
767 | return 0; | |
768 | ||
769 | out_delete: | |
54256301 | 770 | lxc_netdev_delete_by_name(veth1); |
811ef482 CB |
771 | return -1; |
772 | } | |
773 | ||
774 | static int instantiate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
775 | { | |
8021de25 | 776 | char peer[IFNAMSIZ]; |
811ef482 CB |
777 | int err; |
778 | ||
f2711167 | 779 | if (is_empty_string(netdev->link)) { |
811ef482 CB |
780 | ERROR("No link for macvlan network device specified"); |
781 | return -1; | |
782 | } | |
783 | ||
8021de25 CB |
784 | err = snprintf(peer, sizeof(peer), "mcXXXXXX"); |
785 | if (err < 0 || (size_t)err >= sizeof(peer)) | |
811ef482 CB |
786 | return -1; |
787 | ||
3646ffd9 | 788 | if (!lxc_ifname_alnum_case_sensitive(peer)) |
811ef482 CB |
789 | return -1; |
790 | ||
791 | err = lxc_macvlan_create(netdev->link, peer, | |
792 | netdev->priv.macvlan_attr.mode); | |
793 | if (err) { | |
6d1400b5 | 794 | errno = -err; |
795 | SYSERROR("Failed to create macvlan interface \"%s\" on \"%s\"", | |
796 | peer, netdev->link); | |
966e9f1f | 797 | goto on_error; |
811ef482 CB |
798 | } |
799 | ||
9f8cf6e1 CB |
800 | strlcpy(netdev->created_name, peer, IFNAMSIZ); |
801 | ||
811ef482 CB |
802 | netdev->ifindex = if_nametoindex(peer); |
803 | if (!netdev->ifindex) { | |
804 | ERROR("Failed to retrieve ifindex for \"%s\"", peer); | |
966e9f1f | 805 | goto on_error; |
811ef482 CB |
806 | } |
807 | ||
3bef7b7b | 808 | if (netdev->mtu) { |
54256301 CB |
809 | unsigned int mtu; |
810 | ||
3bef7b7b TP |
811 | err = lxc_safe_uint(netdev->mtu, &mtu); |
812 | if (err < 0) { | |
813 | errno = -err; | |
814 | SYSERROR("Failed to parse mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); | |
815 | goto on_error; | |
816 | } | |
817 | ||
818 | err = lxc_netdev_set_mtu(peer, mtu); | |
819 | if (err < 0) { | |
820 | errno = -err; | |
821 | SYSERROR("Failed to set mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); | |
822 | goto on_error; | |
823 | } | |
824 | } | |
825 | ||
811ef482 | 826 | if (netdev->upscript) { |
14a7b0f9 CB |
827 | char *argv[] = { |
828 | "macvlan", | |
829 | netdev->link, | |
830 | NULL, | |
831 | }; | |
832 | ||
833 | err = run_script_argv(handler->name, | |
834 | handler->conf->hooks_version, "net", | |
835 | netdev->upscript, "up", argv); | |
836 | if (err < 0) | |
966e9f1f | 837 | goto on_error; |
811ef482 CB |
838 | } |
839 | ||
840 | DEBUG("Instantiated macvlan \"%s\" with ifindex is %d and mode %d", | |
841 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
842 | ||
843 | return 0; | |
966e9f1f CB |
844 | |
845 | on_error: | |
811ef482 | 846 | lxc_netdev_delete_by_name(peer); |
811ef482 CB |
847 | return -1; |
848 | } | |
849 | ||
0dc9a142 | 850 | static int lxc_ipvlan_create(const char *parent, const char *name, int mode, int isolation) |
c9f52382 | 851 | { |
d16bda44 CB |
852 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
853 | struct nl_handler nlh; | |
854 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
c9f52382 | 855 | int err, index, len; |
856 | struct ifinfomsg *ifi; | |
c9f52382 | 857 | struct rtattr *nest, *nest2; |
c9f52382 | 858 | |
0dc9a142 | 859 | len = strlen(parent); |
c9f52382 | 860 | if (len == 1 || len >= IFNAMSIZ) |
d16bda44 | 861 | return ret_errno(EINVAL); |
c9f52382 | 862 | |
863 | len = strlen(name); | |
864 | if (len == 1 || len >= IFNAMSIZ) | |
d16bda44 | 865 | return ret_errno(EINVAL); |
c9f52382 | 866 | |
0dc9a142 | 867 | index = if_nametoindex(parent); |
c9f52382 | 868 | if (!index) |
d16bda44 | 869 | return ret_errno(EINVAL); |
c9f52382 | 870 | |
d16bda44 | 871 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
c9f52382 | 872 | if (err) |
df62850d | 873 | return err; |
c9f52382 | 874 | |
c9f52382 | 875 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
876 | if (!nlmsg) | |
d16bda44 | 877 | return ret_errno(ENOMEM); |
c9f52382 | 878 | |
879 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); | |
880 | if (!answer) | |
d16bda44 | 881 | return ret_errno(ENOMEM); |
c9f52382 | 882 | |
883 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; | |
884 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; | |
885 | ||
886 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
d16bda44 CB |
887 | if (!ifi) |
888 | return ret_errno(ENOMEM); | |
c9f52382 | 889 | ifi->ifi_family = AF_UNSPEC; |
890 | ||
c9f52382 | 891 | nest = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
892 | if (!nest) | |
d16bda44 | 893 | return ret_errno(EPROTO); |
c9f52382 | 894 | |
895 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "ipvlan")) | |
d16bda44 | 896 | return ret_errno(EPROTO); |
c9f52382 | 897 | |
5755765e KT |
898 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); |
899 | if (!nest2) | |
900 | return ret_errno(EPROTO); | |
901 | ||
3a934e2e | 902 | if (nla_put_u16(nlmsg, IFLA_IPVLAN_MODE, mode)) |
5755765e KT |
903 | return ret_errno(EPROTO); |
904 | ||
cf88a827 TP |
905 | /* if_link.h does not define the isolation flag value for bridge mode (unlike IPVLAN_F_PRIVATE and |
906 | * IPVLAN_F_VEPA) so we define it as 0 and only send mode if mode >0 as default mode is bridge anyway | |
907 | * according to ipvlan docs. | |
5755765e | 908 | */ |
cf88a827 | 909 | if (isolation > 0 && nla_put_u16(nlmsg, IFLA_IPVLAN_ISOLATION, isolation)) |
5755765e | 910 | return ret_errno(EPROTO); |
c9f52382 | 911 | |
5755765e | 912 | nla_end_nested(nlmsg, nest2); |
c9f52382 | 913 | nla_end_nested(nlmsg, nest); |
914 | ||
915 | if (nla_put_u32(nlmsg, IFLA_LINK, index)) | |
d16bda44 | 916 | return ret_errno(EPROTO); |
c9f52382 | 917 | |
918 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
d16bda44 CB |
919 | return ret_errno(EPROTO); |
920 | ||
921 | return netlink_transaction(nlh_ptr, nlmsg, answer); | |
c9f52382 | 922 | } |
923 | ||
924 | static int instantiate_ipvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
925 | { | |
dd119206 | 926 | char peer[IFNAMSIZ]; |
c9f52382 | 927 | int err; |
928 | ||
f2711167 | 929 | if (is_empty_string(netdev->link)) { |
c9f52382 | 930 | ERROR("No link for ipvlan network device specified"); |
931 | return -1; | |
932 | } | |
933 | ||
dd119206 CB |
934 | err = snprintf(peer, sizeof(peer), "ipXXXXXX"); |
935 | if (err < 0 || (size_t)err >= sizeof(peer)) | |
c9f52382 | 936 | return -1; |
937 | ||
3646ffd9 | 938 | if (!lxc_ifname_alnum_case_sensitive(peer)) |
c9f52382 | 939 | return -1; |
940 | ||
dd119206 CB |
941 | err = lxc_ipvlan_create(netdev->link, peer, netdev->priv.ipvlan_attr.mode, |
942 | netdev->priv.ipvlan_attr.isolation); | |
c9f52382 | 943 | if (err) { |
dd119206 CB |
944 | SYSERROR("Failed to create ipvlan interface \"%s\" on \"%s\"", |
945 | peer, netdev->link); | |
c9f52382 | 946 | goto on_error; |
947 | } | |
948 | ||
e7fdd504 CB |
949 | strlcpy(netdev->created_name, peer, IFNAMSIZ); |
950 | ||
c9f52382 | 951 | netdev->ifindex = if_nametoindex(peer); |
952 | if (!netdev->ifindex) { | |
953 | ERROR("Failed to retrieve ifindex for \"%s\"", peer); | |
954 | goto on_error; | |
955 | } | |
956 | ||
006e135e | 957 | if (netdev->mtu) { |
54256301 CB |
958 | unsigned int mtu; |
959 | ||
006e135e | 960 | err = lxc_safe_uint(netdev->mtu, &mtu); |
961 | if (err < 0) { | |
962 | errno = -err; | |
54256301 | 963 | SYSERROR("Failed to parse mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); |
006e135e | 964 | goto on_error; |
965 | } | |
966 | ||
967 | err = lxc_netdev_set_mtu(peer, mtu); | |
968 | if (err < 0) { | |
969 | errno = -err; | |
54256301 | 970 | SYSERROR("Failed to set mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); |
006e135e | 971 | goto on_error; |
972 | } | |
973 | } | |
974 | ||
c9f52382 | 975 | if (netdev->upscript) { |
976 | char *argv[] = { | |
977 | "ipvlan", | |
978 | netdev->link, | |
979 | NULL, | |
980 | }; | |
981 | ||
dd119206 CB |
982 | err = run_script_argv(handler->name, handler->conf->hooks_version, |
983 | "net", netdev->upscript, "up", argv); | |
c9f52382 | 984 | if (err < 0) |
985 | goto on_error; | |
986 | } | |
987 | ||
dd119206 CB |
988 | DEBUG("Instantiated ipvlan \"%s\" with ifindex is %d and mode %d", peer, |
989 | netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
c9f52382 | 990 | |
991 | return 0; | |
992 | ||
993 | on_error: | |
994 | lxc_netdev_delete_by_name(peer); | |
995 | return -1; | |
996 | } | |
997 | ||
811ef482 CB |
998 | static int instantiate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
999 | { | |
1000 | char peer[IFNAMSIZ]; | |
1001 | int err; | |
1002 | static uint16_t vlan_cntr = 0; | |
811ef482 | 1003 | |
f2711167 | 1004 | if (is_empty_string(netdev->link)) { |
811ef482 CB |
1005 | ERROR("No link for vlan network device specified"); |
1006 | return -1; | |
1007 | } | |
1008 | ||
d4d68410 CB |
1009 | err = snprintf(peer, sizeof(peer), "vlan%d-%d", |
1010 | netdev->priv.vlan_attr.vid, vlan_cntr++); | |
811ef482 CB |
1011 | if (err < 0 || (size_t)err >= sizeof(peer)) |
1012 | return -1; | |
1013 | ||
1014 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); | |
1015 | if (err) { | |
6d1400b5 | 1016 | errno = -err; |
1017 | SYSERROR("Failed to create vlan interface \"%s\" on \"%s\"", | |
1018 | peer, netdev->link); | |
811ef482 CB |
1019 | return -1; |
1020 | } | |
1021 | ||
83530dba CB |
1022 | strlcpy(netdev->created_name, peer, IFNAMSIZ); |
1023 | ||
811ef482 CB |
1024 | netdev->ifindex = if_nametoindex(peer); |
1025 | if (!netdev->ifindex) { | |
1026 | ERROR("Failed to retrieve ifindex for \"%s\"", peer); | |
3e2a7b08 | 1027 | goto on_error; |
1028 | } | |
1029 | ||
1030 | if (netdev->mtu) { | |
54256301 CB |
1031 | unsigned int mtu; |
1032 | ||
3e2a7b08 | 1033 | err = lxc_safe_uint(netdev->mtu, &mtu); |
1034 | if (err < 0) { | |
1035 | errno = -err; | |
54256301 | 1036 | SYSERROR("Failed to parse mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); |
3e2a7b08 | 1037 | goto on_error; |
1038 | } | |
1039 | ||
1040 | err = lxc_netdev_set_mtu(peer, mtu); | |
54256301 | 1041 | if (err < 0) { |
3e2a7b08 | 1042 | errno = -err; |
54256301 | 1043 | SYSERROR("Failed to set mtu \"%s\" for interface \"%s\"", netdev->mtu, peer); |
3e2a7b08 | 1044 | goto on_error; |
1045 | } | |
811ef482 CB |
1046 | } |
1047 | ||
3a73d9f1 | 1048 | if (netdev->upscript) { |
1049 | char *argv[] = { | |
1050 | "vlan", | |
1051 | netdev->link, | |
1052 | NULL, | |
1053 | }; | |
1054 | ||
d4d68410 CB |
1055 | err = run_script_argv(handler->name, handler->conf->hooks_version, |
1056 | "net", netdev->upscript, "up", argv); | |
19abca58 | 1057 | if (err < 0) { |
3e2a7b08 | 1058 | goto on_error; |
19abca58 | 1059 | } |
3a73d9f1 | 1060 | } |
1061 | ||
d4d68410 CB |
1062 | DEBUG("Instantiated vlan \"%s\" with ifindex is \"%d\"", peer, |
1063 | netdev->ifindex); | |
811ef482 CB |
1064 | |
1065 | return 0; | |
3e2a7b08 | 1066 | |
1067 | on_error: | |
1068 | lxc_netdev_delete_by_name(peer); | |
1069 | return -1; | |
811ef482 CB |
1070 | } |
1071 | ||
1072 | static int instantiate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1073 | { | |
0b154989 | 1074 | int err, mtu_orig = 0; |
14a7b0f9 | 1075 | |
9c66dc4f CB |
1076 | if (is_empty_string(netdev->link)) |
1077 | return log_error_errno(-1, errno, "No link for physical interface specified"); | |
811ef482 | 1078 | |
75b074ee CB |
1079 | /* |
1080 | * Note that we're retrieving the container's ifindex in the host's | |
790255cf CB |
1081 | * network namespace because we need it to move the device from the |
1082 | * host's network namespace to the container's network namespace later | |
1083 | * on. | |
1084 | * Note that netdev->link will contain the name of the physical network | |
1085 | * device in the host's namespace. | |
1086 | */ | |
811ef482 | 1087 | netdev->ifindex = if_nametoindex(netdev->link); |
9c66dc4f CB |
1088 | if (!netdev->ifindex) |
1089 | return log_error_errno(-1, errno, "Failed to retrieve ifindex for \"%s\"", netdev->link); | |
811ef482 | 1090 | |
61302ef7 | 1091 | strlcpy(netdev->created_name, netdev->link, IFNAMSIZ); |
3473ca76 | 1092 | if (is_empty_string(netdev->name)) |
8bf64b77 | 1093 | (void)strlcpy(netdev->name, netdev->link, IFNAMSIZ); |
61302ef7 | 1094 | |
75b074ee CB |
1095 | /* |
1096 | * Store the ifindex of the host's network device in the host's | |
790255cf CB |
1097 | * namespace. |
1098 | */ | |
1099 | netdev->priv.phys_attr.ifindex = netdev->ifindex; | |
1100 | ||
75b074ee CB |
1101 | /* |
1102 | * Get original device MTU setting and store for restoration after | |
1103 | * container shutdown. | |
1104 | */ | |
0b154989 | 1105 | mtu_orig = netdev_get_mtu(netdev->ifindex); |
9c66dc4f CB |
1106 | if (mtu_orig < 0) |
1107 | return log_error_errno(-1, -mtu_orig, "Failed to get original mtu for interface \"%s\"", netdev->link); | |
0b154989 TP |
1108 | |
1109 | netdev->priv.phys_attr.mtu = mtu_orig; | |
1110 | ||
3bef7b7b | 1111 | if (netdev->mtu) { |
54256301 CB |
1112 | unsigned int mtu; |
1113 | ||
3bef7b7b | 1114 | err = lxc_safe_uint(netdev->mtu, &mtu); |
9c66dc4f CB |
1115 | if (err < 0) |
1116 | return log_error_errno(-1, -err, "Failed to parse mtu \"%s\" for interface \"%s\"", netdev->mtu, netdev->link); | |
14a7b0f9 | 1117 | |
3bef7b7b | 1118 | err = lxc_netdev_set_mtu(netdev->link, mtu); |
9c66dc4f CB |
1119 | if (err < 0) |
1120 | return log_error_errno(-1, -err, "Failed to set mtu \"%s\" for interface \"%s\"", netdev->mtu, netdev->link); | |
3bef7b7b TP |
1121 | } |
1122 | ||
1123 | if (netdev->upscript) { | |
1124 | char *argv[] = { | |
1125 | "phys", | |
1126 | netdev->link, | |
1127 | NULL, | |
1128 | }; | |
1129 | ||
75b074ee CB |
1130 | err = run_script_argv(handler->name, handler->conf->hooks_version, |
1131 | "net", netdev->upscript, "up", argv); | |
9c66dc4f | 1132 | if (err < 0) |
3bef7b7b | 1133 | return -1; |
3bef7b7b TP |
1134 | } |
1135 | ||
75b074ee CB |
1136 | DEBUG("Instantiated phys \"%s\" with ifindex is \"%d\"", netdev->link, |
1137 | netdev->ifindex); | |
811ef482 CB |
1138 | |
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | static int instantiate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1143 | { | |
14a7b0f9 CB |
1144 | int ret; |
1145 | char *argv[] = { | |
1146 | "empty", | |
1147 | NULL, | |
1148 | }; | |
1149 | ||
811ef482 | 1150 | netdev->ifindex = 0; |
14a7b0f9 CB |
1151 | if (!netdev->upscript) |
1152 | return 0; | |
1153 | ||
1154 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1155 | "net", netdev->upscript, "up", argv); | |
1156 | if (ret < 0) | |
1157 | return -1; | |
1158 | ||
811ef482 CB |
1159 | return 0; |
1160 | } | |
1161 | ||
1162 | static int instantiate_none(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1163 | { | |
1164 | netdev->ifindex = 0; | |
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | static instantiate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { | |
1169 | [LXC_NET_VETH] = instantiate_veth, | |
1170 | [LXC_NET_MACVLAN] = instantiate_macvlan, | |
c9f52382 | 1171 | [LXC_NET_IPVLAN] = instantiate_ipvlan, |
811ef482 CB |
1172 | [LXC_NET_VLAN] = instantiate_vlan, |
1173 | [LXC_NET_PHYS] = instantiate_phys, | |
1174 | [LXC_NET_EMPTY] = instantiate_empty, | |
1175 | [LXC_NET_NONE] = instantiate_none, | |
1176 | }; | |
1177 | ||
9d0406c7 | 1178 | static int __instantiate_ns_common(struct lxc_netdev *netdev) |
8bf64b77 CB |
1179 | { |
1180 | char current_ifname[IFNAMSIZ]; | |
1181 | ||
1182 | netdev->ifindex = if_nametoindex(netdev->created_name); | |
1183 | if (!netdev->ifindex) | |
1184 | return log_error_errno(-1, | |
1185 | errno, "Failed to retrieve ifindex for network device with name %s", | |
1186 | netdev->created_name); | |
1187 | ||
3473ca76 | 1188 | if (is_empty_string(netdev->name)) |
8bf64b77 CB |
1189 | (void)strlcpy(netdev->name, "eth%d", IFNAMSIZ); |
1190 | ||
1191 | if (strcmp(netdev->created_name, netdev->name) != 0) { | |
1192 | int ret; | |
1193 | ||
1194 | ret = lxc_netdev_rename_by_name(netdev->created_name, netdev->name); | |
1195 | if (ret) | |
9c66dc4f | 1196 | return log_error_errno(-1, -ret, "Failed to rename network device \"%s\" to \"%s\"", |
8bf64b77 CB |
1197 | netdev->created_name, |
1198 | netdev->name); | |
1199 | ||
1200 | TRACE("Renamed network device from \"%s\" to \"%s\"", netdev->created_name, netdev->name); | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Re-read the name of the interface because its name has changed and | |
1205 | * would be automatically allocated by the system | |
1206 | */ | |
1207 | if (!if_indextoname(netdev->ifindex, current_ifname)) | |
9c66dc4f | 1208 | return log_error_errno(-1, errno, "Failed get name for network device with ifindex %d", netdev->ifindex); |
8bf64b77 CB |
1209 | |
1210 | /* | |
1211 | * Now update the recorded name of the network device to reflect the | |
1212 | * name of the network device in the child's network namespace. We will | |
1213 | * later on send this information back to the parent. | |
1214 | */ | |
1215 | (void)strlcpy(netdev->name, current_ifname, IFNAMSIZ); | |
1216 | ||
1217 | return 0; | |
1218 | } | |
1219 | ||
717f77f2 | 1220 | static int instantiate_ns_veth(struct lxc_netdev *netdev) |
8bf64b77 | 1221 | { |
8bf64b77 | 1222 | |
9d0406c7 | 1223 | return __instantiate_ns_common(netdev); |
8bf64b77 CB |
1224 | } |
1225 | ||
1226 | static int instantiate_ns_macvlan(struct lxc_netdev *netdev) | |
1227 | { | |
9d0406c7 | 1228 | return __instantiate_ns_common(netdev); |
8bf64b77 CB |
1229 | } |
1230 | ||
1231 | static int instantiate_ns_ipvlan(struct lxc_netdev *netdev) | |
1232 | { | |
9d0406c7 | 1233 | return __instantiate_ns_common(netdev); |
8bf64b77 CB |
1234 | } |
1235 | ||
1236 | static int instantiate_ns_vlan(struct lxc_netdev *netdev) | |
1237 | { | |
9d0406c7 | 1238 | return __instantiate_ns_common(netdev); |
8bf64b77 CB |
1239 | } |
1240 | ||
1241 | static int instantiate_ns_phys(struct lxc_netdev *netdev) | |
1242 | { | |
9d0406c7 | 1243 | return __instantiate_ns_common(netdev); |
8bf64b77 CB |
1244 | } |
1245 | ||
1246 | static int instantiate_ns_empty(struct lxc_netdev *netdev) | |
1247 | { | |
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static int instantiate_ns_none(struct lxc_netdev *netdev) | |
1252 | { | |
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | static instantiate_ns_cb netdev_ns_conf[LXC_NET_MAXCONFTYPE + 1] = { | |
1257 | [LXC_NET_VETH] = instantiate_ns_veth, | |
1258 | [LXC_NET_MACVLAN] = instantiate_ns_macvlan, | |
1259 | [LXC_NET_IPVLAN] = instantiate_ns_ipvlan, | |
1260 | [LXC_NET_VLAN] = instantiate_ns_vlan, | |
1261 | [LXC_NET_PHYS] = instantiate_ns_phys, | |
1262 | [LXC_NET_EMPTY] = instantiate_ns_empty, | |
1263 | [LXC_NET_NONE] = instantiate_ns_none, | |
1264 | }; | |
1265 | ||
811ef482 CB |
1266 | static int shutdown_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) |
1267 | { | |
14a7b0f9 CB |
1268 | int ret; |
1269 | char *argv[] = { | |
1270 | "veth", | |
1271 | netdev->link, | |
1272 | NULL, | |
1273 | NULL, | |
1274 | }; | |
1275 | ||
1276 | if (!netdev->downscript) | |
1277 | return 0; | |
811ef482 | 1278 | |
f2711167 | 1279 | if (!is_empty_string(netdev->priv.veth_attr.pair)) |
14a7b0f9 | 1280 | argv[2] = netdev->priv.veth_attr.pair; |
811ef482 | 1281 | else |
14a7b0f9 CB |
1282 | argv[2] = netdev->priv.veth_attr.veth1; |
1283 | ||
1284 | ret = run_script_argv(handler->name, | |
1285 | handler->conf->hooks_version, "net", | |
1286 | netdev->downscript, "down", argv); | |
1287 | if (ret < 0) | |
1288 | return -1; | |
811ef482 | 1289 | |
811ef482 CB |
1290 | return 0; |
1291 | } | |
1292 | ||
1293 | static int shutdown_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1294 | { | |
14a7b0f9 CB |
1295 | int ret; |
1296 | char *argv[] = { | |
1297 | "macvlan", | |
1298 | netdev->link, | |
1299 | NULL, | |
1300 | }; | |
1301 | ||
1302 | if (!netdev->downscript) | |
1303 | return 0; | |
1304 | ||
1305 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1306 | "net", netdev->downscript, "down", argv); | |
1307 | if (ret < 0) | |
1308 | return -1; | |
811ef482 | 1309 | |
811ef482 CB |
1310 | return 0; |
1311 | } | |
1312 | ||
c9f52382 | 1313 | static int shutdown_ipvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
1314 | { | |
1315 | int ret; | |
1316 | char *argv[] = { | |
1317 | "ipvlan", | |
1318 | netdev->link, | |
1319 | NULL, | |
1320 | }; | |
1321 | ||
1322 | if (!netdev->downscript) | |
1323 | return 0; | |
1324 | ||
1325 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1326 | "net", netdev->downscript, "down", argv); | |
1327 | if (ret < 0) | |
1328 | return -1; | |
1329 | ||
1330 | return 0; | |
1331 | } | |
1332 | ||
811ef482 CB |
1333 | static int shutdown_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) |
1334 | { | |
3a73d9f1 | 1335 | int ret; |
1336 | char *argv[] = { | |
1337 | "vlan", | |
1338 | netdev->link, | |
1339 | NULL, | |
1340 | }; | |
1341 | ||
1342 | if (!netdev->downscript) | |
1343 | return 0; | |
1344 | ||
1345 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1346 | "net", netdev->downscript, "down", argv); | |
1347 | if (ret < 0) | |
1348 | return -1; | |
1349 | ||
811ef482 CB |
1350 | return 0; |
1351 | } | |
1352 | ||
1353 | static int shutdown_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1354 | { | |
14a7b0f9 CB |
1355 | int ret; |
1356 | char *argv[] = { | |
1357 | "phys", | |
1358 | netdev->link, | |
1359 | NULL, | |
1360 | }; | |
1361 | ||
1362 | if (!netdev->downscript) | |
1363 | return 0; | |
1364 | ||
1365 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1366 | "net", netdev->downscript, "down", argv); | |
1367 | if (ret < 0) | |
1368 | return -1; | |
811ef482 | 1369 | |
811ef482 CB |
1370 | return 0; |
1371 | } | |
1372 | ||
1373 | static int shutdown_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1374 | { | |
14a7b0f9 CB |
1375 | int ret; |
1376 | char *argv[] = { | |
1377 | "empty", | |
1378 | NULL, | |
1379 | }; | |
1380 | ||
1381 | if (!netdev->downscript) | |
1382 | return 0; | |
1383 | ||
1384 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
1385 | "net", netdev->downscript, "down", argv); | |
1386 | if (ret < 0) | |
1387 | return -1; | |
811ef482 | 1388 | |
811ef482 CB |
1389 | return 0; |
1390 | } | |
1391 | ||
1392 | static int shutdown_none(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
1393 | { | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | static instantiate_cb netdev_deconf[LXC_NET_MAXCONFTYPE + 1] = { | |
1398 | [LXC_NET_VETH] = shutdown_veth, | |
1399 | [LXC_NET_MACVLAN] = shutdown_macvlan, | |
c9f52382 | 1400 | [LXC_NET_IPVLAN] = shutdown_ipvlan, |
811ef482 CB |
1401 | [LXC_NET_VLAN] = shutdown_vlan, |
1402 | [LXC_NET_PHYS] = shutdown_phys, | |
1403 | [LXC_NET_EMPTY] = shutdown_empty, | |
1404 | [LXC_NET_NONE] = shutdown_none, | |
1405 | }; | |
1406 | ||
0037ab49 TP |
1407 | static int lxc_netdev_move_by_index_fd(int ifindex, int fd, const char *ifname) |
1408 | { | |
d16bda44 | 1409 | call_cleaner(nlmsg_free) struct nlmsg *nlmsg = NULL; |
0037ab49 | 1410 | struct nl_handler nlh; |
d16bda44 CB |
1411 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
1412 | int err; | |
0037ab49 | 1413 | struct ifinfomsg *ifi; |
0037ab49 | 1414 | |
d16bda44 | 1415 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
0037ab49 TP |
1416 | if (err) |
1417 | return err; | |
1418 | ||
0037ab49 TP |
1419 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1420 | if (!nlmsg) | |
d16bda44 | 1421 | return ret_errno(ENOMEM); |
0037ab49 TP |
1422 | |
1423 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
1424 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; | |
1425 | ||
1426 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
1427 | if (!ifi) | |
d16bda44 CB |
1428 | return ret_errno(ENOMEM); |
1429 | ||
0037ab49 TP |
1430 | ifi->ifi_family = AF_UNSPEC; |
1431 | ifi->ifi_index = ifindex; | |
1432 | ||
1433 | if (nla_put_u32(nlmsg, IFLA_NET_NS_FD, fd)) | |
d16bda44 | 1434 | return ret_errno(ENOMEM); |
0037ab49 | 1435 | |
3473ca76 | 1436 | if (!is_empty_string(ifname) && nla_put_string(nlmsg, IFLA_IFNAME, ifname)) |
d16bda44 | 1437 | return ret_errno(ENOMEM); |
0037ab49 | 1438 | |
d16bda44 | 1439 | return netlink_transaction(nlh_ptr, nlmsg, nlmsg); |
0037ab49 TP |
1440 | } |
1441 | ||
ebc73a67 | 1442 | int lxc_netdev_move_by_index(int ifindex, pid_t pid, const char *ifname) |
0ad19a3f | 1443 | { |
d16bda44 | 1444 | call_cleaner(nlmsg_free) struct nlmsg *nlmsg = NULL; |
0ad19a3f | 1445 | struct nl_handler nlh; |
d16bda44 CB |
1446 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
1447 | int err; | |
06f976ca | 1448 | struct ifinfomsg *ifi; |
0ad19a3f | 1449 | |
d16bda44 | 1450 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1451 | if (err) |
1452 | return err; | |
0ad19a3f | 1453 | |
0ad19a3f | 1454 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1455 | if (!nlmsg) | |
d16bda44 | 1456 | return ret_errno(ENOMEM); |
0ad19a3f | 1457 | |
ebc73a67 | 1458 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
1459 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1460 | ||
1461 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b | 1462 | if (!ifi) |
d16bda44 CB |
1463 | return ret_errno(ENOMEM); |
1464 | ||
06f976ca SZ |
1465 | ifi->ifi_family = AF_UNSPEC; |
1466 | ifi->ifi_index = ifindex; | |
0ad19a3f | 1467 | |
1468 | if (nla_put_u32(nlmsg, IFLA_NET_NS_PID, pid)) | |
d16bda44 | 1469 | return ret_errno(ENOMEM); |
0ad19a3f | 1470 | |
3473ca76 | 1471 | if (!is_empty_string(ifname) && nla_put_string(nlmsg, IFLA_IFNAME, ifname)) |
d16bda44 | 1472 | return ret_errno(ENOMEM); |
8d357196 | 1473 | |
d16bda44 | 1474 | return netlink_transaction(nlh_ptr, nlmsg, nlmsg); |
0ad19a3f | 1475 | } |
1476 | ||
ebc73a67 CB |
1477 | /* If we are asked to move a wireless interface, then we must actually move its |
1478 | * phyN device. Detect that condition and return the physname here. The physname | |
1479 | * will be passed to lxc_netdev_move_wlan() which will free it when done. | |
e5848d39 SH |
1480 | */ |
1481 | #define PHYSNAME "/sys/class/net/%s/phy80211/name" | |
e4103cf6 | 1482 | char *is_wlan(const char *ifname) |
e5848d39 | 1483 | { |
4110345b CB |
1484 | __do_fclose FILE *f = NULL; |
1485 | __do_free char *path = NULL, *physname = NULL; | |
ebc73a67 | 1486 | int i, ret; |
e5848d39 | 1487 | long physlen; |
ebc73a67 | 1488 | size_t len; |
e5848d39 | 1489 | |
ebc73a67 | 1490 | len = strlen(ifname) + strlen(PHYSNAME) - 1; |
95ea3d1f | 1491 | path = must_realloc(NULL, len + 1); |
e5848d39 | 1492 | ret = snprintf(path, len, PHYSNAME, ifname); |
ebc73a67 | 1493 | if (ret < 0 || (size_t)ret >= len) |
4110345b | 1494 | return NULL; |
ebc73a67 | 1495 | |
4110345b | 1496 | f = fopen(path, "re"); |
ebc73a67 | 1497 | if (!f) |
4110345b | 1498 | return NULL; |
ebc73a67 | 1499 | |
1a0e70ac | 1500 | /* Feh - sb.st_size is always 4096. */ |
e5848d39 SH |
1501 | fseek(f, 0, SEEK_END); |
1502 | physlen = ftell(f); | |
1503 | fseek(f, 0, SEEK_SET); | |
4110345b CB |
1504 | if (physlen < 0) |
1505 | return NULL; | |
ebc73a67 CB |
1506 | |
1507 | physname = malloc(physlen + 1); | |
4110345b CB |
1508 | if (!physname) |
1509 | return NULL; | |
ebc73a67 CB |
1510 | |
1511 | memset(physname, 0, physlen + 1); | |
e5848d39 | 1512 | ret = fread(physname, 1, physlen, f); |
e5848d39 | 1513 | if (ret < 0) |
4110345b | 1514 | return NULL; |
e5848d39 | 1515 | |
ebc73a67 | 1516 | for (i = 0; i < physlen; i++) { |
e5848d39 SH |
1517 | if (physname[i] == '\n') |
1518 | physname[i] = '\0'; | |
ebc73a67 | 1519 | |
e5848d39 SH |
1520 | if (physname[i] == '\0') |
1521 | break; | |
1522 | } | |
1523 | ||
4110345b | 1524 | return move_ptr(physname); |
e5848d39 SH |
1525 | } |
1526 | ||
ebc73a67 CB |
1527 | static int lxc_netdev_rename_by_name_in_netns(pid_t pid, const char *old, |
1528 | const char *new) | |
e5848d39 | 1529 | { |
ebc73a67 | 1530 | pid_t fpid; |
e5848d39 | 1531 | |
ebc73a67 | 1532 | fpid = fork(); |
e5848d39 SH |
1533 | if (fpid < 0) |
1534 | return -1; | |
ebc73a67 | 1535 | |
e5848d39 SH |
1536 | if (fpid != 0) |
1537 | return wait_for_pid(fpid); | |
ebc73a67 | 1538 | |
e5848d39 SH |
1539 | if (!switch_to_ns(pid, "net")) |
1540 | return -1; | |
ebc73a67 | 1541 | |
05ec44f8 | 1542 | _exit(lxc_netdev_rename_by_name(old, new)); |
e5848d39 SH |
1543 | } |
1544 | ||
e4103cf6 | 1545 | int lxc_netdev_move_wlan(char *physname, const char *ifname, pid_t pid, |
ebc73a67 | 1546 | const char *newname) |
e5848d39 | 1547 | { |
3dd78294 | 1548 | __do_free char *cmd = NULL; |
ebc73a67 | 1549 | pid_t fpid; |
e5848d39 SH |
1550 | |
1551 | /* Move phyN into the container. TODO - do this using netlink. | |
ebc73a67 CB |
1552 | * However, IIUC this involves a bit more complicated work to talk to |
1553 | * the 80211 module, so for now just call out to iw. | |
e5848d39 SH |
1554 | */ |
1555 | cmd = on_path("iw", NULL); | |
9c66dc4f | 1556 | if (!cmd) |
3dd78294 | 1557 | return -1; |
e5848d39 SH |
1558 | |
1559 | fpid = fork(); | |
1560 | if (fpid < 0) | |
3dd78294 | 1561 | return -1; |
ebc73a67 | 1562 | |
e5848d39 SH |
1563 | if (fpid == 0) { |
1564 | char pidstr[30]; | |
1565 | sprintf(pidstr, "%d", pid); | |
9c66dc4f | 1566 | execlp("iw", "iw", "phy", physname, "set", "netns", pidstr, (char *)NULL); |
ebd582ae | 1567 | _exit(EXIT_FAILURE); |
e5848d39 | 1568 | } |
ebc73a67 | 1569 | |
e5848d39 | 1570 | if (wait_for_pid(fpid)) |
3dd78294 | 1571 | return -1; |
e5848d39 | 1572 | |
e5848d39 | 1573 | if (newname) |
3dd78294 | 1574 | return lxc_netdev_rename_by_name_in_netns(pid, ifname, newname); |
e5848d39 | 1575 | |
3dd78294 | 1576 | return 0; |
e5848d39 SH |
1577 | } |
1578 | ||
8d357196 | 1579 | int lxc_netdev_move_by_name(const char *ifname, pid_t pid, const char* newname) |
8befa924 | 1580 | { |
3dd78294 | 1581 | __do_free char *physname = NULL; |
8befa924 SH |
1582 | int index; |
1583 | ||
8befa924 SH |
1584 | if (!ifname) |
1585 | return -EINVAL; | |
1586 | ||
32571606 | 1587 | index = if_nametoindex(ifname); |
49428bf3 DY |
1588 | if (!index) |
1589 | return -EINVAL; | |
32571606 | 1590 | |
ebc73a67 CB |
1591 | physname = is_wlan(ifname); |
1592 | if (physname) | |
e5848d39 SH |
1593 | return lxc_netdev_move_wlan(physname, ifname, pid, newname); |
1594 | ||
8d357196 | 1595 | return lxc_netdev_move_by_index(index, pid, newname); |
8befa924 SH |
1596 | } |
1597 | ||
b84f58b9 | 1598 | int lxc_netdev_delete_by_index(int ifindex) |
0ad19a3f | 1599 | { |
d16bda44 CB |
1600 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1601 | struct nl_handler nlh; | |
1602 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
b84f58b9 | 1603 | int err; |
ebc73a67 | 1604 | struct ifinfomsg *ifi; |
0ad19a3f | 1605 | |
d16bda44 | 1606 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1607 | if (err) |
1608 | return err; | |
0ad19a3f | 1609 | |
0ad19a3f | 1610 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1611 | if (!nlmsg) | |
d16bda44 | 1612 | return ret_errno(ENOMEM); |
0ad19a3f | 1613 | |
06f976ca | 1614 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1615 | if (!answer) |
d16bda44 | 1616 | return ret_errno(ENOMEM); |
0ad19a3f | 1617 | |
ebc73a67 | 1618 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST; |
06f976ca SZ |
1619 | nlmsg->nlmsghdr->nlmsg_type = RTM_DELLINK; |
1620 | ||
1621 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b | 1622 | if (!ifi) |
d16bda44 CB |
1623 | return ret_errno(ENOMEM); |
1624 | ||
06f976ca SZ |
1625 | ifi->ifi_family = AF_UNSPEC; |
1626 | ifi->ifi_index = ifindex; | |
0ad19a3f | 1627 | |
d16bda44 | 1628 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 1629 | } |
1630 | ||
b84f58b9 DL |
1631 | int lxc_netdev_delete_by_name(const char *name) |
1632 | { | |
1633 | int index; | |
1634 | ||
1635 | index = if_nametoindex(name); | |
1636 | if (!index) | |
1637 | return -EINVAL; | |
1638 | ||
1639 | return lxc_netdev_delete_by_index(index); | |
1640 | } | |
1641 | ||
1642 | int lxc_netdev_rename_by_index(int ifindex, const char *newname) | |
b9a5bb58 | 1643 | { |
d16bda44 CB |
1644 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1645 | struct nl_handler nlh; | |
1646 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1647 | int err, len; |
06f976ca | 1648 | struct ifinfomsg *ifi; |
b9a5bb58 | 1649 | |
d16bda44 | 1650 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1651 | if (err) |
1652 | return err; | |
b9a5bb58 | 1653 | |
b84f58b9 | 1654 | len = strlen(newname); |
d16bda44 CB |
1655 | if (len == 1 || len >= IFNAMSIZ) |
1656 | return ret_errno(EINVAL); | |
b84f58b9 | 1657 | |
b9a5bb58 DL |
1658 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1659 | if (!nlmsg) | |
d16bda44 | 1660 | return ret_errno(ENOMEM); |
b9a5bb58 | 1661 | |
06f976ca | 1662 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
b9a5bb58 | 1663 | if (!answer) |
d16bda44 | 1664 | return ret_errno(ENOMEM); |
b9a5bb58 | 1665 | |
ebc73a67 | 1666 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST; |
06f976ca SZ |
1667 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1668 | ||
1669 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b | 1670 | if (!ifi) |
d16bda44 CB |
1671 | return ret_errno(ENOMEM); |
1672 | ||
06f976ca SZ |
1673 | ifi->ifi_family = AF_UNSPEC; |
1674 | ifi->ifi_index = ifindex; | |
b84f58b9 DL |
1675 | |
1676 | if (nla_put_string(nlmsg, IFLA_IFNAME, newname)) | |
d16bda44 | 1677 | return ret_errno(ENOMEM); |
b9a5bb58 | 1678 | |
d16bda44 | 1679 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
b9a5bb58 DL |
1680 | } |
1681 | ||
b84f58b9 DL |
1682 | int lxc_netdev_rename_by_name(const char *oldname, const char *newname) |
1683 | { | |
1684 | int len, index; | |
1685 | ||
1686 | len = strlen(oldname); | |
dae3fdf6 | 1687 | if (len == 1 || len >= IFNAMSIZ) |
b84f58b9 DL |
1688 | return -EINVAL; |
1689 | ||
1690 | index = if_nametoindex(oldname); | |
1691 | if (!index) | |
1692 | return -EINVAL; | |
1693 | ||
1694 | return lxc_netdev_rename_by_index(index, newname); | |
1695 | } | |
1696 | ||
8befa924 | 1697 | int netdev_set_flag(const char *name, int flag) |
0ad19a3f | 1698 | { |
d16bda44 CB |
1699 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1700 | struct nl_handler nlh; | |
1701 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1702 | int err, index, len; |
06f976ca | 1703 | struct ifinfomsg *ifi; |
0ad19a3f | 1704 | |
d16bda44 | 1705 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1706 | if (err) |
1707 | return err; | |
0ad19a3f | 1708 | |
1709 | len = strlen(name); | |
dae3fdf6 | 1710 | if (len == 1 || len >= IFNAMSIZ) |
d16bda44 | 1711 | return ret_errno(EINVAL); |
0ad19a3f | 1712 | |
1713 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1714 | if (!nlmsg) | |
d16bda44 | 1715 | return ret_errno(ENOMEM); |
0ad19a3f | 1716 | |
06f976ca | 1717 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1718 | if (!answer) |
d16bda44 | 1719 | return ret_errno(ENOMEM); |
0ad19a3f | 1720 | |
1721 | index = if_nametoindex(name); | |
1722 | if (!index) | |
d16bda44 | 1723 | return ret_errno(EINVAL); |
0ad19a3f | 1724 | |
ebc73a67 | 1725 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
1726 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1727 | ||
1728 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
d16bda44 CB |
1729 | if (!ifi) |
1730 | return ret_errno(ENOMEM); | |
1731 | ||
06f976ca SZ |
1732 | ifi->ifi_family = AF_UNSPEC; |
1733 | ifi->ifi_index = index; | |
1734 | ifi->ifi_change |= IFF_UP; | |
1735 | ifi->ifi_flags |= flag; | |
0ad19a3f | 1736 | |
d16bda44 | 1737 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 1738 | } |
1739 | ||
59eac805 | 1740 | static int netdev_get_flag(const char *name, int *flag) |
efa1cf45 | 1741 | { |
d16bda44 CB |
1742 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1743 | struct nl_handler nlh; | |
1744 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1745 | int err, index, len; |
a4318300 | 1746 | struct ifinfomsg *ifi; |
efa1cf45 DY |
1747 | |
1748 | if (!name) | |
d16bda44 | 1749 | return ret_errno(EINVAL); |
efa1cf45 | 1750 | |
d16bda44 | 1751 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
efa1cf45 DY |
1752 | if (err) |
1753 | return err; | |
1754 | ||
efa1cf45 DY |
1755 | len = strlen(name); |
1756 | if (len == 1 || len >= IFNAMSIZ) | |
d16bda44 | 1757 | return ret_errno(EINVAL); |
efa1cf45 | 1758 | |
efa1cf45 DY |
1759 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1760 | if (!nlmsg) | |
d16bda44 | 1761 | return ret_errno(ENOMEM); |
efa1cf45 | 1762 | |
06f976ca | 1763 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
efa1cf45 | 1764 | if (!answer) |
d16bda44 | 1765 | return ret_errno(ENOMEM); |
efa1cf45 | 1766 | |
efa1cf45 DY |
1767 | index = if_nametoindex(name); |
1768 | if (!index) | |
d16bda44 | 1769 | return ret_errno(EINVAL); |
efa1cf45 | 1770 | |
06f976ca SZ |
1771 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST; |
1772 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETLINK; | |
1773 | ||
1774 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
d16bda44 CB |
1775 | if (!ifi) |
1776 | return ret_errno(ENOMEM); | |
1777 | ||
06f976ca SZ |
1778 | ifi->ifi_family = AF_UNSPEC; |
1779 | ifi->ifi_index = index; | |
efa1cf45 | 1780 | |
d16bda44 | 1781 | err = netlink_transaction(nlh_ptr, nlmsg, answer); |
efa1cf45 | 1782 | if (err) |
d16bda44 | 1783 | return ret_set_errno(-1, errno); |
efa1cf45 | 1784 | |
06f976ca | 1785 | ifi = NLMSG_DATA(answer->nlmsghdr); |
efa1cf45 DY |
1786 | |
1787 | *flag = ifi->ifi_flags; | |
efa1cf45 DY |
1788 | return err; |
1789 | } | |
1790 | ||
1791 | /* | |
1792 | * \brief Check a interface is up or not. | |
1793 | * | |
1794 | * \param name: name for the interface. | |
1795 | * | |
1796 | * \return int. | |
1797 | * 0 means interface is down. | |
1798 | * 1 means interface is up. | |
1799 | * Others means error happened, and ret-value is the error number. | |
1800 | */ | |
ebc73a67 | 1801 | int lxc_netdev_isup(const char *name) |
efa1cf45 | 1802 | { |
ebc73a67 | 1803 | int err, flag; |
efa1cf45 DY |
1804 | |
1805 | err = netdev_get_flag(name, &flag); | |
1806 | if (err) | |
ebc73a67 CB |
1807 | return err; |
1808 | ||
efa1cf45 DY |
1809 | if (flag & IFF_UP) |
1810 | return 1; | |
ebc73a67 | 1811 | |
efa1cf45 | 1812 | return 0; |
efa1cf45 DY |
1813 | } |
1814 | ||
0130df54 SH |
1815 | int netdev_get_mtu(int ifindex) |
1816 | { | |
a5f5cb41 | 1817 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
0130df54 | 1818 | struct nl_handler nlh; |
a5f5cb41 CB |
1819 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
1820 | int readmore = 0, recv_len = 0; | |
1821 | int answer_len, err, res; | |
06f976ca | 1822 | struct ifinfomsg *ifi; |
0130df54 | 1823 | struct nlmsghdr *msg; |
0130df54 | 1824 | |
a5f5cb41 | 1825 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
0130df54 SH |
1826 | if (err) |
1827 | return err; | |
1828 | ||
0130df54 SH |
1829 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1830 | if (!nlmsg) | |
a5f5cb41 | 1831 | return ret_errno(ENOMEM); |
0130df54 | 1832 | |
06f976ca | 1833 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0130df54 | 1834 | if (!answer) |
a5f5cb41 | 1835 | return ret_errno(ENOMEM); |
0130df54 SH |
1836 | |
1837 | /* Save the answer buffer length, since it will be overwritten | |
1838 | * on the first receive (and we might need to receive more than | |
ebc73a67 CB |
1839 | * once. |
1840 | */ | |
06f976ca SZ |
1841 | answer_len = answer->nlmsghdr->nlmsg_len; |
1842 | ||
ebc73a67 | 1843 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; |
06f976ca | 1844 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETLINK; |
0130df54 | 1845 | |
06f976ca | 1846 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); |
25a9939b | 1847 | if (!ifi) |
a5f5cb41 CB |
1848 | return ret_errno(ENOMEM); |
1849 | ||
06f976ca | 1850 | ifi->ifi_family = AF_UNSPEC; |
0130df54 SH |
1851 | |
1852 | /* Send the request for addresses, which returns all addresses | |
1853 | * on all interfaces. */ | |
a5f5cb41 | 1854 | err = netlink_send(nlh_ptr, nlmsg); |
0130df54 | 1855 | if (err < 0) |
a5f5cb41 | 1856 | return ret_set_errno(-1, errno); |
0130df54 | 1857 | |
6ce39620 CB |
1858 | #pragma GCC diagnostic push |
1859 | #pragma GCC diagnostic ignored "-Wcast-align" | |
1860 | ||
0130df54 SH |
1861 | do { |
1862 | /* Restore the answer buffer length, it might have been | |
ebc73a67 CB |
1863 | * overwritten by a previous receive. |
1864 | */ | |
06f976ca | 1865 | answer->nlmsghdr->nlmsg_len = answer_len; |
0130df54 SH |
1866 | |
1867 | /* Get the (next) batch of reply messages */ | |
a5f5cb41 | 1868 | err = netlink_rcv(nlh_ptr, answer); |
0130df54 | 1869 | if (err < 0) |
a5f5cb41 | 1870 | return ret_set_errno(-1, errno); |
0130df54 SH |
1871 | |
1872 | recv_len = err; | |
0130df54 SH |
1873 | |
1874 | /* Satisfy the typing for the netlink macros */ | |
06f976ca | 1875 | msg = answer->nlmsghdr; |
0130df54 SH |
1876 | |
1877 | while (NLMSG_OK(msg, recv_len)) { | |
0130df54 SH |
1878 | /* Stop reading if we see an error message */ |
1879 | if (msg->nlmsg_type == NLMSG_ERROR) { | |
a5f5cb41 CB |
1880 | struct nlmsgerr *errmsg = (struct nlmsgerr *)NLMSG_DATA(msg); |
1881 | return ret_set_errno(errmsg->error, errno); | |
0130df54 SH |
1882 | } |
1883 | ||
1884 | /* Stop reading if we see a NLMSG_DONE message */ | |
1885 | if (msg->nlmsg_type == NLMSG_DONE) { | |
1886 | readmore = 0; | |
1887 | break; | |
1888 | } | |
1889 | ||
06f976ca | 1890 | ifi = NLMSG_DATA(msg); |
0130df54 SH |
1891 | if (ifi->ifi_index == ifindex) { |
1892 | struct rtattr *rta = IFLA_RTA(ifi); | |
a5f5cb41 CB |
1893 | int attr_len = msg->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)); |
1894 | ||
0130df54 | 1895 | res = 0; |
ebc73a67 | 1896 | while (RTA_OK(rta, attr_len)) { |
9c66dc4f | 1897 | /* |
a5f5cb41 | 1898 | * Found a local address for the |
ebc73a67 CB |
1899 | * requested interface, return it. |
1900 | */ | |
0130df54 | 1901 | if (rta->rta_type == IFLA_MTU) { |
a5f5cb41 CB |
1902 | memcpy(&res, RTA_DATA(rta), sizeof(int)); |
1903 | return res; | |
0130df54 | 1904 | } |
a5f5cb41 | 1905 | |
0130df54 SH |
1906 | rta = RTA_NEXT(rta, attr_len); |
1907 | } | |
0130df54 SH |
1908 | } |
1909 | ||
ebc73a67 CB |
1910 | /* Keep reading more data from the socket if the last |
1911 | * message had the NLF_F_MULTI flag set. | |
1912 | */ | |
0130df54 SH |
1913 | readmore = (msg->nlmsg_flags & NLM_F_MULTI); |
1914 | ||
ebc73a67 | 1915 | /* Look at the next message received in this buffer. */ |
0130df54 SH |
1916 | msg = NLMSG_NEXT(msg, recv_len); |
1917 | } | |
1918 | } while (readmore); | |
1919 | ||
6ce39620 CB |
1920 | #pragma GCC diagnostic pop |
1921 | ||
ebc73a67 | 1922 | /* If we end up here, we didn't find any result, so signal an error. */ |
a5f5cb41 | 1923 | return -1; |
0130df54 SH |
1924 | } |
1925 | ||
d472214b | 1926 | int lxc_netdev_set_mtu(const char *name, int mtu) |
75d09f83 | 1927 | { |
a5f5cb41 CB |
1928 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1929 | struct nl_handler nlh; | |
1930 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
54256301 | 1931 | int err, len; |
06f976ca | 1932 | struct ifinfomsg *ifi; |
75d09f83 | 1933 | |
a5f5cb41 | 1934 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1935 | if (err) |
1936 | return err; | |
75d09f83 DL |
1937 | |
1938 | len = strlen(name); | |
dae3fdf6 | 1939 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1940 | return ret_errno(EINVAL); |
75d09f83 DL |
1941 | |
1942 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1943 | if (!nlmsg) | |
a5f5cb41 | 1944 | return ret_errno(ENOMEM); |
75d09f83 | 1945 | |
06f976ca | 1946 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
75d09f83 | 1947 | if (!answer) |
a5f5cb41 | 1948 | return ret_errno(ENOMEM); |
75d09f83 | 1949 | |
ebc73a67 | 1950 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
1951 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1952 | ||
1953 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
a5f5cb41 CB |
1954 | if (!ifi) |
1955 | return ret_errno(ENOMEM); | |
1956 | ||
06f976ca | 1957 | ifi->ifi_family = AF_UNSPEC; |
54256301 CB |
1958 | |
1959 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
a5f5cb41 | 1960 | return ret_errno(ENOMEM); |
75d09f83 DL |
1961 | |
1962 | if (nla_put_u32(nlmsg, IFLA_MTU, mtu)) | |
a5f5cb41 | 1963 | return ret_errno(ENOMEM); |
75d09f83 | 1964 | |
a5f5cb41 | 1965 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
75d09f83 DL |
1966 | } |
1967 | ||
d472214b | 1968 | int lxc_netdev_up(const char *name) |
0ad19a3f | 1969 | { |
d472214b | 1970 | return netdev_set_flag(name, IFF_UP); |
0ad19a3f | 1971 | } |
1972 | ||
d472214b | 1973 | int lxc_netdev_down(const char *name) |
0ad19a3f | 1974 | { |
d472214b | 1975 | return netdev_set_flag(name, 0); |
0ad19a3f | 1976 | } |
1977 | ||
54256301 | 1978 | int lxc_veth_create(const char *name1, const char *name2, pid_t pid, unsigned int mtu) |
0ad19a3f | 1979 | { |
a5f5cb41 CB |
1980 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
1981 | struct nl_handler nlh; | |
1982 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 1983 | int err, len; |
06f976ca | 1984 | struct ifinfomsg *ifi; |
0ad19a3f | 1985 | struct rtattr *nest1, *nest2, *nest3; |
0ad19a3f | 1986 | |
a5f5cb41 | 1987 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
1988 | if (err) |
1989 | return err; | |
0ad19a3f | 1990 | |
1991 | len = strlen(name1); | |
dae3fdf6 | 1992 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1993 | return ret_errno(EINVAL); |
0ad19a3f | 1994 | |
1995 | len = strlen(name2); | |
dae3fdf6 | 1996 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 1997 | return ret_errno(EINVAL); |
0ad19a3f | 1998 | |
1999 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
2000 | if (!nlmsg) | |
a5f5cb41 | 2001 | return ret_errno(ENOMEM); |
0ad19a3f | 2002 | |
06f976ca | 2003 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 2004 | if (!answer) |
a5f5cb41 | 2005 | return ret_errno(ENOMEM); |
0ad19a3f | 2006 | |
a5f5cb41 | 2007 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
2008 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
2009 | ||
2010 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b | 2011 | if (!ifi) |
a5f5cb41 CB |
2012 | return ret_errno(ENOMEM); |
2013 | ||
06f976ca | 2014 | ifi->ifi_family = AF_UNSPEC; |
0ad19a3f | 2015 | |
79e68309 | 2016 | nest1 = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
0ad19a3f | 2017 | if (!nest1) |
a5f5cb41 | 2018 | return ret_errno(EINVAL); |
0ad19a3f | 2019 | |
2020 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "veth")) | |
a5f5cb41 | 2021 | return ret_errno(ENOMEM); |
0ad19a3f | 2022 | |
2023 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
2024 | if (!nest2) | |
a5f5cb41 | 2025 | return ret_errno(ENOMEM); |
0ad19a3f | 2026 | |
2027 | nest3 = nla_begin_nested(nlmsg, VETH_INFO_PEER); | |
2028 | if (!nest3) | |
a5f5cb41 | 2029 | return ret_errno(ENOMEM); |
0ad19a3f | 2030 | |
06f976ca | 2031 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); |
a5f5cb41 CB |
2032 | if (!ifi) |
2033 | return ret_errno(ENOMEM); | |
0ad19a3f | 2034 | |
2035 | if (nla_put_string(nlmsg, IFLA_IFNAME, name2)) | |
a5f5cb41 | 2036 | return ret_errno(ENOMEM); |
0ad19a3f | 2037 | |
54256301 | 2038 | if (mtu > 0 && nla_put_u32(nlmsg, IFLA_MTU, mtu)) |
a5f5cb41 | 2039 | return ret_errno(ENOMEM); |
54256301 CB |
2040 | |
2041 | if (pid > 0 && nla_put_u32(nlmsg, IFLA_NET_NS_PID, pid)) | |
a5f5cb41 | 2042 | return ret_errno(ENOMEM); |
54256301 | 2043 | |
0ad19a3f | 2044 | nla_end_nested(nlmsg, nest3); |
0ad19a3f | 2045 | nla_end_nested(nlmsg, nest2); |
0ad19a3f | 2046 | nla_end_nested(nlmsg, nest1); |
2047 | ||
2048 | if (nla_put_string(nlmsg, IFLA_IFNAME, name1)) | |
a5f5cb41 | 2049 | return ret_errno(ENOMEM); |
0ad19a3f | 2050 | |
a5f5cb41 | 2051 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 2052 | } |
2053 | ||
ebc73a67 | 2054 | /* TODO: merge with lxc_macvlan_create */ |
0dc9a142 | 2055 | int lxc_vlan_create(const char *parent, const char *name, unsigned short vlanid) |
26c39028 | 2056 | { |
a5f5cb41 CB |
2057 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
2058 | struct nl_handler nlh; | |
2059 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 2060 | int err, len, lindex; |
06f976ca | 2061 | struct ifinfomsg *ifi; |
26c39028 | 2062 | struct rtattr *nest, *nest2; |
26c39028 | 2063 | |
a5f5cb41 | 2064 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
2065 | if (err) |
2066 | return err; | |
26c39028 | 2067 | |
0dc9a142 | 2068 | len = strlen(parent); |
dae3fdf6 | 2069 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 2070 | return ret_errno(EINVAL); |
26c39028 JHS |
2071 | |
2072 | len = strlen(name); | |
dae3fdf6 | 2073 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 2074 | return ret_errno(EINVAL); |
26c39028 JHS |
2075 | |
2076 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
2077 | if (!nlmsg) | |
a5f5cb41 | 2078 | return ret_errno(ENOMEM); |
26c39028 | 2079 | |
06f976ca | 2080 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
26c39028 | 2081 | if (!answer) |
a5f5cb41 | 2082 | return ret_errno(ENOMEM); |
26c39028 | 2083 | |
0dc9a142 | 2084 | lindex = if_nametoindex(parent); |
26c39028 | 2085 | if (!lindex) |
a5f5cb41 | 2086 | return ret_errno(EINVAL); |
26c39028 | 2087 | |
a5f5cb41 | 2088 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
2089 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
2090 | ||
2091 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
a5f5cb41 CB |
2092 | if (!ifi) |
2093 | return ret_errno(ENOMEM); | |
2094 | ||
06f976ca | 2095 | ifi->ifi_family = AF_UNSPEC; |
26c39028 | 2096 | |
79e68309 | 2097 | nest = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
26c39028 | 2098 | if (!nest) |
a5f5cb41 | 2099 | return ret_errno(ENOMEM); |
26c39028 JHS |
2100 | |
2101 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "vlan")) | |
a5f5cb41 | 2102 | return ret_errno(ENOMEM); |
26c39028 JHS |
2103 | |
2104 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
2105 | if (!nest2) | |
a5f5cb41 | 2106 | return ret_errno(ENOMEM); |
e892973e | 2107 | |
26c39028 | 2108 | if (nla_put_u16(nlmsg, IFLA_VLAN_ID, vlanid)) |
a5f5cb41 | 2109 | return ret_errno(ENOMEM); |
e892973e | 2110 | |
26c39028 | 2111 | nla_end_nested(nlmsg, nest2); |
26c39028 JHS |
2112 | nla_end_nested(nlmsg, nest); |
2113 | ||
2114 | if (nla_put_u32(nlmsg, IFLA_LINK, lindex)) | |
a5f5cb41 | 2115 | return ret_errno(ENOMEM); |
26c39028 JHS |
2116 | |
2117 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
a5f5cb41 CB |
2118 | return ret_errno(ENOMEM); |
2119 | ||
2120 | return netlink_transaction(nlh_ptr, nlmsg, answer); | |
26c39028 JHS |
2121 | } |
2122 | ||
0dc9a142 | 2123 | int lxc_macvlan_create(const char *parent, const char *name, int mode) |
0ad19a3f | 2124 | { |
a5f5cb41 CB |
2125 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
2126 | struct nl_handler nlh; | |
2127 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 2128 | int err, index, len; |
06f976ca | 2129 | struct ifinfomsg *ifi; |
e892973e | 2130 | struct rtattr *nest, *nest2; |
0ad19a3f | 2131 | |
a5f5cb41 | 2132 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
2133 | if (err) |
2134 | return err; | |
0ad19a3f | 2135 | |
0dc9a142 | 2136 | len = strlen(parent); |
dae3fdf6 | 2137 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 2138 | return ret_errno(EINVAL); |
0ad19a3f | 2139 | |
2140 | len = strlen(name); | |
dae3fdf6 | 2141 | if (len == 1 || len >= IFNAMSIZ) |
a5f5cb41 | 2142 | return ret_errno(EINVAL); |
0ad19a3f | 2143 | |
2144 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
2145 | if (!nlmsg) | |
a5f5cb41 | 2146 | return ret_errno(ENOMEM); |
0ad19a3f | 2147 | |
06f976ca | 2148 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 2149 | if (!answer) |
a5f5cb41 | 2150 | return ret_errno(ENOMEM); |
0ad19a3f | 2151 | |
0dc9a142 | 2152 | index = if_nametoindex(parent); |
0ad19a3f | 2153 | if (!index) |
a5f5cb41 | 2154 | return ret_errno(EINVAL); |
0ad19a3f | 2155 | |
a5f5cb41 | 2156 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
2157 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
2158 | ||
2159 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
a5f5cb41 CB |
2160 | if (!ifi) |
2161 | return ret_errno(ENOMEM); | |
2162 | ||
06f976ca | 2163 | ifi->ifi_family = AF_UNSPEC; |
0ad19a3f | 2164 | |
79e68309 | 2165 | nest = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
0ad19a3f | 2166 | if (!nest) |
a5f5cb41 | 2167 | return ret_errno(ENOMEM); |
0ad19a3f | 2168 | |
2169 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "macvlan")) | |
a5f5cb41 | 2170 | return ret_errno(ENOMEM); |
0ad19a3f | 2171 | |
e892973e DL |
2172 | if (mode) { |
2173 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
2174 | if (!nest2) | |
a5f5cb41 | 2175 | return ret_errno(ENOMEM); |
e892973e DL |
2176 | |
2177 | if (nla_put_u32(nlmsg, IFLA_MACVLAN_MODE, mode)) | |
a5f5cb41 | 2178 | return ret_errno(ENOMEM); |
e892973e DL |
2179 | |
2180 | nla_end_nested(nlmsg, nest2); | |
2181 | } | |
2182 | ||
0ad19a3f | 2183 | nla_end_nested(nlmsg, nest); |
2184 | ||
2185 | if (nla_put_u32(nlmsg, IFLA_LINK, index)) | |
a5f5cb41 | 2186 | return ret_errno(ENOMEM); |
0ad19a3f | 2187 | |
2188 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
a5f5cb41 | 2189 | return ret_errno(ENOMEM); |
0ad19a3f | 2190 | |
a5f5cb41 | 2191 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 2192 | } |
2193 | ||
2194 | static int proc_sys_net_write(const char *path, const char *value) | |
2195 | { | |
ebc73a67 CB |
2196 | int fd; |
2197 | int err = 0; | |
0ad19a3f | 2198 | |
2199 | fd = open(path, O_WRONLY); | |
2200 | if (fd < 0) | |
2201 | return -errno; | |
2202 | ||
f640cf46 | 2203 | if (lxc_write_nointr(fd, value, strlen(value)) < 0) |
0ad19a3f | 2204 | err = -errno; |
2205 | ||
2206 | close(fd); | |
2207 | return err; | |
2208 | } | |
2209 | ||
6dfa9581 | 2210 | static int ip_forwarding_set(const char *ifname, int family, int flag) |
6509154d | 2211 | { |
2212 | int ret; | |
2213 | char path[PATH_MAX]; | |
6509154d | 2214 | |
2215 | if (family != AF_INET && family != AF_INET6) | |
6dfa9581 | 2216 | return -EINVAL; |
6509154d | 2217 | |
9c66dc4f | 2218 | ret = snprintf(path, sizeof(path), "/proc/sys/net/%s/conf/%s/%s", |
6dfa9581 | 2219 | family == AF_INET ? "ipv4" : "ipv6", ifname, "forwarding"); |
9c66dc4f | 2220 | if (ret < 0 || (size_t)ret >= sizeof(path)) |
6dfa9581 | 2221 | return -E2BIG; |
6509154d | 2222 | |
6dfa9581 TP |
2223 | return proc_sys_net_write(path, flag ? "1" : "0"); |
2224 | } | |
2225 | ||
2226 | int lxc_ip_forwarding_on(const char *name, int family) | |
2227 | { | |
2228 | return ip_forwarding_set(name, family, 1); | |
2229 | } | |
2230 | ||
2231 | int lxc_ip_forwarding_off(const char *name, int family) | |
2232 | { | |
2233 | return ip_forwarding_set(name, family, 0); | |
6509154d | 2234 | } |
2235 | ||
0ad19a3f | 2236 | static int neigh_proxy_set(const char *ifname, int family, int flag) |
2237 | { | |
9ba8130c | 2238 | int ret; |
419590da | 2239 | char path[PATH_MAX]; |
0ad19a3f | 2240 | |
2241 | if (family != AF_INET && family != AF_INET6) | |
3cfc0f3a | 2242 | return -EINVAL; |
0ad19a3f | 2243 | |
9c66dc4f | 2244 | ret = snprintf(path, sizeof(path), "/proc/sys/net/%s/conf/%s/%s", |
ebc73a67 CB |
2245 | family == AF_INET ? "ipv4" : "ipv6", ifname, |
2246 | family == AF_INET ? "proxy_arp" : "proxy_ndp"); | |
9c66dc4f | 2247 | if (ret < 0 || (size_t)ret >= sizeof(path)) |
9ba8130c | 2248 | return -E2BIG; |
0ad19a3f | 2249 | |
ebc73a67 | 2250 | return proc_sys_net_write(path, flag ? "1" : "0"); |
0ad19a3f | 2251 | } |
2252 | ||
6509154d | 2253 | static int lxc_is_ip_neigh_proxy_enabled(const char *ifname, int family) |
2254 | { | |
2255 | int ret; | |
2256 | char path[PATH_MAX]; | |
2257 | char buf[1] = ""; | |
2258 | ||
2259 | if (family != AF_INET && family != AF_INET6) | |
596a002c | 2260 | return ret_set_errno(-1, EINVAL); |
6509154d | 2261 | |
9c66dc4f | 2262 | ret = snprintf(path, sizeof(path), "/proc/sys/net/%s/conf/%s/%s", |
6509154d | 2263 | family == AF_INET ? "ipv4" : "ipv6", ifname, |
2264 | family == AF_INET ? "proxy_arp" : "proxy_ndp"); | |
9c66dc4f | 2265 | if (ret < 0 || (size_t)ret >= sizeof(path)) |
596a002c | 2266 | return ret_set_errno(-1, E2BIG); |
6509154d | 2267 | |
2268 | return lxc_read_file_expect(path, buf, 1, "1"); | |
2269 | } | |
2270 | ||
497353b6 | 2271 | int lxc_neigh_proxy_on(const char *name, int family) |
0ad19a3f | 2272 | { |
2273 | return neigh_proxy_set(name, family, 1); | |
2274 | } | |
2275 | ||
497353b6 | 2276 | int lxc_neigh_proxy_off(const char *name, int family) |
0ad19a3f | 2277 | { |
2278 | return neigh_proxy_set(name, family, 0); | |
2279 | } | |
2280 | ||
2281 | int lxc_convert_mac(char *macaddr, struct sockaddr *sockaddr) | |
2282 | { | |
1f1b18e7 DL |
2283 | int i = 0; |
2284 | unsigned val; | |
ebc73a67 CB |
2285 | char c; |
2286 | unsigned char *data; | |
1f1b18e7 DL |
2287 | |
2288 | sockaddr->sa_family = ARPHRD_ETHER; | |
2289 | data = (unsigned char *)sockaddr->sa_data; | |
2290 | ||
2291 | while ((*macaddr != '\0') && (i < ETH_ALEN)) { | |
ebc73a67 CB |
2292 | c = *macaddr++; |
2293 | if (isdigit(c)) | |
2294 | val = c - '0'; | |
2295 | else if (c >= 'a' && c <= 'f') | |
2296 | val = c - 'a' + 10; | |
2297 | else if (c >= 'A' && c <= 'F') | |
2298 | val = c - 'A' + 10; | |
2299 | else | |
2300 | return -EINVAL; | |
2301 | ||
2302 | val <<= 4; | |
2303 | c = *macaddr; | |
2304 | if (isdigit(c)) | |
2305 | val |= c - '0'; | |
2306 | else if (c >= 'a' && c <= 'f') | |
2307 | val |= c - 'a' + 10; | |
2308 | else if (c >= 'A' && c <= 'F') | |
2309 | val |= c - 'A' + 10; | |
2310 | else if (c == ':' || c == 0) | |
2311 | val >>= 4; | |
2312 | else | |
2313 | return -EINVAL; | |
2314 | if (c != 0) | |
2315 | macaddr++; | |
2316 | *data++ = (unsigned char)(val & 0377); | |
2317 | i++; | |
2318 | ||
2319 | if (*macaddr == ':') | |
2320 | macaddr++; | |
0ad19a3f | 2321 | } |
0ad19a3f | 2322 | |
1f1b18e7 | 2323 | return 0; |
0ad19a3f | 2324 | } |
2325 | ||
ebc73a67 CB |
2326 | static int ip_addr_add(int family, int ifindex, void *addr, void *bcast, |
2327 | void *acast, int prefix) | |
0ad19a3f | 2328 | { |
a5f5cb41 CB |
2329 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
2330 | struct nl_handler nlh; | |
2331 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 2332 | int addrlen, err; |
06f976ca | 2333 | struct ifaddrmsg *ifa; |
0ad19a3f | 2334 | |
ebc73a67 CB |
2335 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
2336 | : sizeof(struct in6_addr); | |
4bf1968d | 2337 | |
a5f5cb41 | 2338 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
3cfc0f3a MN |
2339 | if (err) |
2340 | return err; | |
0ad19a3f | 2341 | |
0ad19a3f | 2342 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
2343 | if (!nlmsg) | |
a5f5cb41 | 2344 | return ret_errno(ENOMEM); |
0ad19a3f | 2345 | |
06f976ca | 2346 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 2347 | if (!answer) |
a5f5cb41 | 2348 | return ret_errno(ENOMEM); |
0ad19a3f | 2349 | |
a5f5cb41 | 2350 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
06f976ca SZ |
2351 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWADDR; |
2352 | ||
2353 | ifa = nlmsg_reserve(nlmsg, sizeof(struct ifaddrmsg)); | |
acf47e1b | 2354 | if (!ifa) |
a5f5cb41 CB |
2355 | return ret_errno(ENOMEM); |
2356 | ||
06f976ca SZ |
2357 | ifa->ifa_prefixlen = prefix; |
2358 | ifa->ifa_index = ifindex; | |
2359 | ifa->ifa_family = family; | |
2360 | ifa->ifa_scope = 0; | |
acf47e1b | 2361 | |
4bf1968d | 2362 | if (nla_put_buffer(nlmsg, IFA_LOCAL, addr, addrlen)) |
a5f5cb41 | 2363 | return ret_errno(EINVAL); |
0ad19a3f | 2364 | |
4bf1968d | 2365 | if (nla_put_buffer(nlmsg, IFA_ADDRESS, addr, addrlen)) |
a5f5cb41 | 2366 | return ret_errno(EINVAL); |
0ad19a3f | 2367 | |
d8948a52 | 2368 | if (nla_put_buffer(nlmsg, IFA_BROADCAST, bcast, addrlen)) |
a5f5cb41 | 2369 | return ret_errno(EINVAL); |
1f1b18e7 | 2370 | |
ebc73a67 | 2371 | /* TODO: multicast, anycast with ipv6 */ |
79881dc6 DL |
2372 | if (family == AF_INET6 && |
2373 | (memcmp(bcast, &in6addr_any, sizeof(in6addr_any)) || | |
2374 | memcmp(acast, &in6addr_any, sizeof(in6addr_any)))) | |
a5f5cb41 | 2375 | return ret_errno(EPROTONOSUPPORT); |
0ad19a3f | 2376 | |
a5f5cb41 | 2377 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
0ad19a3f | 2378 | } |
2379 | ||
1f1b18e7 | 2380 | int lxc_ipv6_addr_add(int ifindex, struct in6_addr *addr, |
ebc73a67 CB |
2381 | struct in6_addr *mcast, struct in6_addr *acast, |
2382 | int prefix) | |
1f1b18e7 DL |
2383 | { |
2384 | return ip_addr_add(AF_INET6, ifindex, addr, mcast, acast, prefix); | |
2385 | } | |
2386 | ||
ebc73a67 CB |
2387 | int lxc_ipv4_addr_add(int ifindex, struct in_addr *addr, struct in_addr *bcast, |
2388 | int prefix) | |
1f1b18e7 DL |
2389 | { |
2390 | return ip_addr_add(AF_INET, ifindex, addr, bcast, NULL, prefix); | |
2391 | } | |
2392 | ||
ebc73a67 CB |
2393 | /* Find an IFA_LOCAL (or IFA_ADDRESS if not IFA_LOCAL is present) address from |
2394 | * the given RTM_NEWADDR message. Allocates memory for the address and stores | |
2395 | * that pointer in *res (so res should be an in_addr** or in6_addr**). | |
19a26f82 | 2396 | */ |
6ce39620 CB |
2397 | #pragma GCC diagnostic push |
2398 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2399 | ||
ebc73a67 CB |
2400 | static int ifa_get_local_ip(int family, struct nlmsghdr *msg, void **res) |
2401 | { | |
2402 | int addrlen; | |
06f976ca SZ |
2403 | struct ifaddrmsg *ifa = NLMSG_DATA(msg); |
2404 | struct rtattr *rta = IFA_RTA(ifa); | |
2405 | int attr_len = NLMSG_PAYLOAD(msg, sizeof(struct ifaddrmsg)); | |
19a26f82 | 2406 | |
06f976ca | 2407 | if (ifa->ifa_family != family) |
19a26f82 MK |
2408 | return 0; |
2409 | ||
ebc73a67 CB |
2410 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
2411 | : sizeof(struct in6_addr); | |
19a26f82 MK |
2412 | |
2413 | /* Loop over the rtattr's in this message */ | |
ebc73a67 | 2414 | while (RTA_OK(rta, attr_len)) { |
19a26f82 | 2415 | /* Found a local address for the requested interface, |
ebc73a67 CB |
2416 | * return it. |
2417 | */ | |
2418 | if (rta->rta_type == IFA_LOCAL || | |
2419 | rta->rta_type == IFA_ADDRESS) { | |
2420 | /* Sanity check. The family check above should make sure | |
2421 | * the address length is correct, but check here just in | |
2422 | * case. | |
2423 | */ | |
19a26f82 MK |
2424 | if (RTA_PAYLOAD(rta) != addrlen) |
2425 | return -1; | |
2426 | ||
ebc73a67 CB |
2427 | /* We might have found an IFA_ADDRESS before, which we |
2428 | * now overwrite with an IFA_LOCAL. | |
2429 | */ | |
dd66e5ad | 2430 | if (!*res) { |
19a26f82 | 2431 | *res = malloc(addrlen); |
dd66e5ad DE |
2432 | if (!*res) |
2433 | return -1; | |
2434 | } | |
19a26f82 MK |
2435 | |
2436 | memcpy(*res, RTA_DATA(rta), addrlen); | |
19a26f82 MK |
2437 | if (rta->rta_type == IFA_LOCAL) |
2438 | break; | |
2439 | } | |
2440 | rta = RTA_NEXT(rta, attr_len); | |
2441 | } | |
2442 | return 0; | |
2443 | } | |
2444 | ||
6ce39620 CB |
2445 | #pragma GCC diagnostic pop |
2446 | ||
19a26f82 MK |
2447 | static int ip_addr_get(int family, int ifindex, void **res) |
2448 | { | |
a5f5cb41 CB |
2449 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
2450 | struct nl_handler nlh; | |
2451 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
ebc73a67 | 2452 | int answer_len, err; |
06f976ca | 2453 | struct ifaddrmsg *ifa; |
19a26f82 | 2454 | struct nlmsghdr *msg; |
ebc73a67 | 2455 | int readmore = 0, recv_len = 0; |
19a26f82 | 2456 | |
a5f5cb41 | 2457 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
19a26f82 MK |
2458 | if (err) |
2459 | return err; | |
2460 | ||
19a26f82 MK |
2461 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
2462 | if (!nlmsg) | |
a5f5cb41 | 2463 | return ret_errno(ENOMEM); |
19a26f82 | 2464 | |
06f976ca | 2465 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
19a26f82 | 2466 | if (!answer) |
a5f5cb41 | 2467 | return ret_errno(ENOMEM); |
19a26f82 | 2468 | |
ebc73a67 CB |
2469 | /* Save the answer buffer length, since it will be overwritten on the |
2470 | * first receive (and we might need to receive more than once). | |
2471 | */ | |
06f976ca SZ |
2472 | answer_len = answer->nlmsghdr->nlmsg_len; |
2473 | ||
ebc73a67 | 2474 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ROOT; |
06f976ca | 2475 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETADDR; |
19a26f82 | 2476 | |
06f976ca | 2477 | ifa = nlmsg_reserve(nlmsg, sizeof(struct ifaddrmsg)); |
25a9939b | 2478 | if (!ifa) |
a5f5cb41 CB |
2479 | return ret_errno(ENOMEM); |
2480 | ||
06f976ca | 2481 | ifa->ifa_family = family; |
19a26f82 | 2482 | |
ebc73a67 CB |
2483 | /* Send the request for addresses, which returns all addresses on all |
2484 | * interfaces. | |
2485 | */ | |
a5f5cb41 | 2486 | err = netlink_send(nlh_ptr, nlmsg); |
19a26f82 | 2487 | if (err < 0) |
a5f5cb41 | 2488 | return ret_set_errno(err, errno); |
19a26f82 | 2489 | |
6ce39620 CB |
2490 | #pragma GCC diagnostic push |
2491 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2492 | ||
19a26f82 MK |
2493 | do { |
2494 | /* Restore the answer buffer length, it might have been | |
ebc73a67 CB |
2495 | * overwritten by a previous receive. |
2496 | */ | |
06f976ca | 2497 | answer->nlmsghdr->nlmsg_len = answer_len; |
19a26f82 | 2498 | |
ebc73a67 | 2499 | /* Get the (next) batch of reply messages. */ |
a5f5cb41 | 2500 | err = netlink_rcv(nlh_ptr, answer); |
19a26f82 | 2501 | if (err < 0) |
a5f5cb41 | 2502 | return ret_set_errno(err, errno); |
19a26f82 MK |
2503 | |
2504 | recv_len = err; | |
2505 | err = 0; | |
2506 | ||
ebc73a67 | 2507 | /* Satisfy the typing for the netlink macros. */ |
06f976ca | 2508 | msg = answer->nlmsghdr; |
19a26f82 MK |
2509 | |
2510 | while (NLMSG_OK(msg, recv_len)) { | |
ebc73a67 | 2511 | /* Stop reading if we see an error message. */ |
19a26f82 | 2512 | if (msg->nlmsg_type == NLMSG_ERROR) { |
a5f5cb41 CB |
2513 | struct nlmsgerr *errmsg = (struct nlmsgerr *)NLMSG_DATA(msg); |
2514 | return ret_set_errno(errmsg->error, errno); | |
19a26f82 MK |
2515 | } |
2516 | ||
ebc73a67 | 2517 | /* Stop reading if we see a NLMSG_DONE message. */ |
19a26f82 MK |
2518 | if (msg->nlmsg_type == NLMSG_DONE) { |
2519 | readmore = 0; | |
2520 | break; | |
2521 | } | |
2522 | ||
a5f5cb41 CB |
2523 | if (msg->nlmsg_type != RTM_NEWADDR) |
2524 | return ret_errno(EINVAL); | |
19a26f82 | 2525 | |
06f976ca SZ |
2526 | ifa = (struct ifaddrmsg *)NLMSG_DATA(msg); |
2527 | if (ifa->ifa_index == ifindex) { | |
a5f5cb41 CB |
2528 | if (ifa_get_local_ip(family, msg, res) < 0) |
2529 | return ret_errno(EINVAL); | |
51e7a874 | 2530 | |
ebc73a67 | 2531 | /* Found a result, stop searching. */ |
19a26f82 | 2532 | if (*res) |
a5f5cb41 | 2533 | return 0; |
19a26f82 MK |
2534 | } |
2535 | ||
ebc73a67 CB |
2536 | /* Keep reading more data from the socket if the last |
2537 | * message had the NLF_F_MULTI flag set. | |
2538 | */ | |
19a26f82 MK |
2539 | readmore = (msg->nlmsg_flags & NLM_F_MULTI); |
2540 | ||
ebc73a67 | 2541 | /* Look at the next message received in this buffer. */ |
19a26f82 MK |
2542 | msg = NLMSG_NEXT(msg, recv_len); |
2543 | } | |
2544 | } while (readmore); | |
2545 | ||
6ce39620 CB |
2546 | #pragma GCC diagnostic pop |
2547 | ||
19a26f82 | 2548 | /* If we end up here, we didn't find any result, so signal an |
ebc73a67 CB |
2549 | * error. |
2550 | */ | |
a5f5cb41 | 2551 | return -1; |
19a26f82 MK |
2552 | } |
2553 | ||
2554 | int lxc_ipv6_addr_get(int ifindex, struct in6_addr **res) | |
2555 | { | |
ebc73a67 | 2556 | return ip_addr_get(AF_INET6, ifindex, (void **)res); |
19a26f82 MK |
2557 | } |
2558 | ||
ebc73a67 | 2559 | int lxc_ipv4_addr_get(int ifindex, struct in_addr **res) |
19a26f82 | 2560 | { |
ebc73a67 | 2561 | return ip_addr_get(AF_INET, ifindex, (void **)res); |
19a26f82 MK |
2562 | } |
2563 | ||
f8fee0e2 MK |
2564 | static int ip_gateway_add(int family, int ifindex, void *gw) |
2565 | { | |
a5f5cb41 | 2566 | call_cleaner(nlmsg_free) struct nlmsg *answer = NULL, *nlmsg = NULL; |
f8fee0e2 | 2567 | struct nl_handler nlh; |
a5f5cb41 CB |
2568 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
2569 | int addrlen, err; | |
06f976ca | 2570 | struct rtmsg *rt; |
f8fee0e2 | 2571 | |
ebc73a67 CB |
2572 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
2573 | : sizeof(struct in6_addr); | |
f8fee0e2 | 2574 | |
a5f5cb41 | 2575 | err = netlink_open(nlh_ptr, NETLINK_ROUTE); |
f8fee0e2 MK |
2576 | if (err) |
2577 | return err; | |
2578 | ||
f8fee0e2 MK |
2579 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
2580 | if (!nlmsg) | |
a5f5cb41 | 2581 | return ret_errno(ENOMEM); |
f8fee0e2 | 2582 | |
06f976ca | 2583 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
f8fee0e2 | 2584 | if (!answer) |
a5f5cb41 | 2585 | return ret_errno(ENOMEM); |
f8fee0e2 | 2586 | |
a5f5cb41 | 2587 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
06f976ca SZ |
2588 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWROUTE; |
2589 | ||
2590 | rt = nlmsg_reserve(nlmsg, sizeof(struct rtmsg)); | |
25a9939b | 2591 | if (!rt) |
a5f5cb41 CB |
2592 | return ret_errno(ENOMEM); |
2593 | ||
06f976ca SZ |
2594 | rt->rtm_family = family; |
2595 | rt->rtm_table = RT_TABLE_MAIN; | |
2596 | rt->rtm_scope = RT_SCOPE_UNIVERSE; | |
2597 | rt->rtm_protocol = RTPROT_BOOT; | |
2598 | rt->rtm_type = RTN_UNICAST; | |
f8fee0e2 | 2599 | /* "default" destination */ |
06f976ca | 2600 | rt->rtm_dst_len = 0; |
f8fee0e2 | 2601 | |
a2f9a670 | 2602 | /* If gateway address not supplied, then a device route will be created instead */ |
a5f5cb41 CB |
2603 | if (gw && nla_put_buffer(nlmsg, RTA_GATEWAY, gw, addrlen)) |
2604 | return ret_errno(ENOMEM); | |
f8fee0e2 MK |
2605 | |
2606 | /* Adding the interface index enables the use of link-local | |
ebc73a67 CB |
2607 | * addresses for the gateway. |
2608 | */ | |
f8fee0e2 | 2609 | if (nla_put_u32(nlmsg, RTA_OIF, ifindex)) |
a5f5cb41 | 2610 | return ret_errno(EINVAL); |
f8fee0e2 | 2611 | |
a5f5cb41 | 2612 | return netlink_transaction(nlh_ptr, nlmsg, answer); |
f8fee0e2 MK |
2613 | } |
2614 | ||
2615 | int lxc_ipv4_gateway_add(int ifindex, struct in_addr *gw) | |
2616 | { | |
2617 | return ip_gateway_add(AF_INET, ifindex, gw); | |
2618 | } | |
2619 | ||
2620 | int lxc_ipv6_gateway_add(int ifindex, struct in6_addr *gw) | |
2621 | { | |
2622 | return ip_gateway_add(AF_INET6, ifindex, gw); | |
2623 | } | |
581c75e7 | 2624 | bool is_ovs_bridge(const char *bridge) |
0d204771 | 2625 | { |
ebc73a67 | 2626 | int ret; |
0d204771 | 2627 | struct stat sb; |
ebc73a67 | 2628 | char brdirname[22 + IFNAMSIZ + 1] = {0}; |
0d204771 | 2629 | |
ebc73a67 CB |
2630 | ret = snprintf(brdirname, 22 + IFNAMSIZ + 1, "/sys/class/net/%s/bridge", |
2631 | bridge); | |
2632 | if (ret < 0 || (size_t)ret >= 22 + IFNAMSIZ + 1) | |
2633 | return false; | |
2634 | ||
2635 | ret = stat(brdirname, &sb); | |
2636 | if (ret < 0 && errno == ENOENT) | |
0d204771 | 2637 | return true; |
ebc73a67 | 2638 | |
0d204771 SH |
2639 | return false; |
2640 | } | |
2641 | ||
581c75e7 CB |
2642 | struct ovs_veth_args { |
2643 | const char *bridge; | |
2644 | const char *nic; | |
2645 | }; | |
2646 | ||
cb0dc11b CB |
2647 | /* Called from a background thread - when nic goes away, remove it from the |
2648 | * bridge. | |
c43cbc04 | 2649 | */ |
581c75e7 | 2650 | static int lxc_ovs_delete_port_exec(void *data) |
c43cbc04 | 2651 | { |
581c75e7 | 2652 | struct ovs_veth_args *args = data; |
cb0dc11b | 2653 | |
9c66dc4f | 2654 | execlp("ovs-vsctl", "ovs-vsctl", "del-port", args->bridge, args->nic, (char *)NULL); |
581c75e7 | 2655 | return -1; |
c43cbc04 SH |
2656 | } |
2657 | ||
581c75e7 | 2658 | int lxc_ovs_delete_port(const char *bridge, const char *nic) |
0d204771 | 2659 | { |
c43cbc04 | 2660 | int ret; |
419590da | 2661 | char cmd_output[PATH_MAX]; |
581c75e7 | 2662 | struct ovs_veth_args args; |
6ad22d06 | 2663 | |
581c75e7 CB |
2664 | args.bridge = bridge; |
2665 | args.nic = nic; | |
2666 | ret = run_command(cmd_output, sizeof(cmd_output), | |
2667 | lxc_ovs_delete_port_exec, (void *)&args); | |
9c66dc4f CB |
2668 | if (ret < 0) |
2669 | return log_error(-1, "Failed to delete \"%s\" from openvswitch bridge \"%s\": %s", nic, bridge, cmd_output); | |
0d204771 | 2670 | |
581c75e7 CB |
2671 | return 0; |
2672 | } | |
ebc73a67 | 2673 | |
581c75e7 CB |
2674 | static int lxc_ovs_attach_bridge_exec(void *data) |
2675 | { | |
2676 | struct ovs_veth_args *args = data; | |
ebc73a67 | 2677 | |
9c66dc4f | 2678 | execlp("ovs-vsctl", "ovs-vsctl", "add-port", args->bridge, args->nic, (char *)NULL); |
581c75e7 CB |
2679 | return -1; |
2680 | } | |
ebc73a67 | 2681 | |
581c75e7 CB |
2682 | static int lxc_ovs_attach_bridge(const char *bridge, const char *nic) |
2683 | { | |
2684 | int ret; | |
419590da | 2685 | char cmd_output[PATH_MAX]; |
581c75e7 | 2686 | struct ovs_veth_args args; |
ebc73a67 | 2687 | |
581c75e7 CB |
2688 | args.bridge = bridge; |
2689 | args.nic = nic; | |
2690 | ret = run_command(cmd_output, sizeof(cmd_output), | |
2691 | lxc_ovs_attach_bridge_exec, (void *)&args); | |
9c66dc4f CB |
2692 | if (ret < 0) |
2693 | return log_error(-1, "Failed to attach \"%s\" to openvswitch bridge \"%s\": %s", nic, bridge, cmd_output); | |
0d204771 | 2694 | |
581c75e7 | 2695 | return 0; |
0d204771 | 2696 | } |
0d204771 | 2697 | |
581c75e7 | 2698 | int lxc_bridge_attach(const char *bridge, const char *ifname) |
0ad19a3f | 2699 | { |
ebc73a67 | 2700 | int err, fd, index; |
9de31d5a | 2701 | size_t retlen; |
0ad19a3f | 2702 | struct ifreq ifr; |
2703 | ||
dae3fdf6 | 2704 | if (strlen(ifname) >= IFNAMSIZ) |
3cfc0f3a | 2705 | return -EINVAL; |
0ad19a3f | 2706 | |
2707 | index = if_nametoindex(ifname); | |
2708 | if (!index) | |
3cfc0f3a | 2709 | return -EINVAL; |
0ad19a3f | 2710 | |
0d204771 | 2711 | if (is_ovs_bridge(bridge)) |
581c75e7 | 2712 | return lxc_ovs_attach_bridge(bridge, ifname); |
0d204771 | 2713 | |
ad9429e5 | 2714 | fd = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0); |
0ad19a3f | 2715 | if (fd < 0) |
3cfc0f3a | 2716 | return -errno; |
0ad19a3f | 2717 | |
9de31d5a | 2718 | retlen = strlcpy(ifr.ifr_name, bridge, IFNAMSIZ); |
42cc4083 CB |
2719 | if (retlen >= IFNAMSIZ) { |
2720 | close(fd); | |
9de31d5a | 2721 | return -E2BIG; |
42cc4083 | 2722 | } |
9de31d5a | 2723 | |
ebc73a67 | 2724 | ifr.ifr_name[IFNAMSIZ - 1] = '\0'; |
0ad19a3f | 2725 | ifr.ifr_ifindex = index; |
7d163508 | 2726 | err = ioctl(fd, SIOCBRADDIF, &ifr); |
0ad19a3f | 2727 | close(fd); |
3cfc0f3a MN |
2728 | if (err) |
2729 | err = -errno; | |
0ad19a3f | 2730 | |
2731 | return err; | |
2732 | } | |
72d0e1cb | 2733 | |
ebc73a67 | 2734 | static const char *const lxc_network_types[LXC_NET_MAXCONFTYPE + 1] = { |
b343592b | 2735 | [LXC_NET_EMPTY] = "empty", |
72d0e1cb SG |
2736 | [LXC_NET_VETH] = "veth", |
2737 | [LXC_NET_MACVLAN] = "macvlan", | |
c9f52382 | 2738 | [LXC_NET_IPVLAN] = "ipvlan", |
72d0e1cb | 2739 | [LXC_NET_PHYS] = "phys", |
b343592b BP |
2740 | [LXC_NET_VLAN] = "vlan", |
2741 | [LXC_NET_NONE] = "none", | |
72d0e1cb SG |
2742 | }; |
2743 | ||
2744 | const char *lxc_net_type_to_str(int type) | |
2745 | { | |
2746 | if (type < 0 || type > LXC_NET_MAXCONFTYPE) | |
2747 | return NULL; | |
ebc73a67 | 2748 | |
72d0e1cb SG |
2749 | return lxc_network_types[type]; |
2750 | } | |
8befa924 | 2751 | |
3646ffd9 | 2752 | static const char padchar[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; |
a0265685 | 2753 | |
3646ffd9 | 2754 | char *lxc_ifname_alnum_case_sensitive(char *template) |
a0265685 | 2755 | { |
966e9f1f | 2756 | char name[IFNAMSIZ]; |
966e9f1f | 2757 | size_t i = 0; |
280cc35f | 2758 | #ifdef HAVE_RAND_R |
2759 | unsigned int seed; | |
2760 | ||
2761 | seed = randseed(false); | |
2762 | #else | |
2763 | ||
2764 | (void)randseed(true); | |
2765 | #endif | |
a0265685 | 2766 | |
535e8859 CB |
2767 | if (strlen(template) >= IFNAMSIZ) |
2768 | return NULL; | |
2769 | ||
ebc73a67 | 2770 | /* Generate random names until we find one that doesn't exist. */ |
51a8a74c | 2771 | for (;;) { |
966e9f1f | 2772 | name[0] = '\0'; |
94b1cade | 2773 | (void)strlcpy(name, template, IFNAMSIZ); |
a0265685 SG |
2774 | |
2775 | for (i = 0; i < strlen(name); i++) { | |
2776 | if (name[i] == 'X') { | |
2777 | #ifdef HAVE_RAND_R | |
8523344a | 2778 | name[i] = padchar[rand_r(&seed) % strlen(padchar)]; |
a0265685 | 2779 | #else |
8523344a | 2780 | name[i] = padchar[rand() % strlen(padchar)]; |
a0265685 SG |
2781 | #endif |
2782 | } | |
2783 | } | |
2784 | ||
3a026996 | 2785 | if (if_nametoindex(name) == 0) |
a0265685 | 2786 | break; |
a0265685 SG |
2787 | } |
2788 | ||
94b1cade DJ |
2789 | (void)strlcpy(template, name, strlen(template) + 1); |
2790 | ||
2791 | return template; | |
a0265685 SG |
2792 | } |
2793 | ||
8befa924 SH |
2794 | int setup_private_host_hw_addr(char *veth1) |
2795 | { | |
ebc73a67 | 2796 | int err, sockfd; |
8befa924 | 2797 | struct ifreq ifr; |
8befa924 | 2798 | |
ad9429e5 | 2799 | sockfd = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0); |
8befa924 SH |
2800 | if (sockfd < 0) |
2801 | return -errno; | |
2802 | ||
ebc73a67 | 2803 | err = snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); |
87c6e5db DJ |
2804 | if (err < 0 || (size_t)err >= IFNAMSIZ) { |
2805 | close(sockfd); | |
ebc73a67 | 2806 | return -E2BIG; |
87c6e5db | 2807 | } |
ebc73a67 | 2808 | |
8befa924 SH |
2809 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); |
2810 | if (err < 0) { | |
8befa924 | 2811 | close(sockfd); |
8befa924 SH |
2812 | return -errno; |
2813 | } | |
2814 | ||
2815 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
2816 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
8befa924 | 2817 | close(sockfd); |
8befa924 SH |
2818 | if (err < 0) |
2819 | return -errno; | |
2820 | ||
2821 | return 0; | |
2822 | } | |
811ef482 CB |
2823 | |
2824 | int lxc_find_gateway_addresses(struct lxc_handler *handler) | |
2825 | { | |
2826 | struct lxc_list *network = &handler->conf->network; | |
2827 | struct lxc_list *iterator; | |
2828 | struct lxc_netdev *netdev; | |
2829 | int link_index; | |
2830 | ||
2831 | lxc_list_for_each(iterator, network) { | |
2832 | netdev = iterator->elem; | |
2833 | ||
2834 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
2835 | continue; | |
2836 | ||
9c66dc4f CB |
2837 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) |
2838 | return log_error_errno(-1, EINVAL, "Automatic gateway detection is only supported for veth and macvlan"); | |
811ef482 | 2839 | |
f2711167 | 2840 | if (is_empty_string(netdev->link)) { |
9c66dc4f | 2841 | return log_error_errno(-1, errno, "Automatic gateway detection needs a link interface"); |
811ef482 CB |
2842 | } |
2843 | ||
2844 | link_index = if_nametoindex(netdev->link); | |
2845 | if (!link_index) | |
2846 | return -EINVAL; | |
2847 | ||
2848 | if (netdev->ipv4_gateway_auto) { | |
9c66dc4f CB |
2849 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) |
2850 | return log_error_errno(-1, errno, "Failed to automatically find ipv4 gateway address from link interface \"%s\"", netdev->link); | |
811ef482 CB |
2851 | } |
2852 | ||
2853 | if (netdev->ipv6_gateway_auto) { | |
9c66dc4f CB |
2854 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) |
2855 | return log_error_errno(-1, errno, "Failed to automatically find ipv6 gateway address from link interface \"%s\"", netdev->link); | |
811ef482 CB |
2856 | } |
2857 | } | |
2858 | ||
2859 | return 0; | |
2860 | } | |
2861 | ||
2862 | #define LXC_USERNIC_PATH LIBEXECDIR "/lxc/lxc-user-nic" | |
f0ecc19d | 2863 | static int lxc_create_network_unpriv_exec(const char *lxcpath, const char *lxcname, |
4d781681 | 2864 | struct lxc_netdev *netdev, pid_t pid, unsigned int hooks_version) |
811ef482 CB |
2865 | { |
2866 | int ret; | |
2867 | pid_t child; | |
2868 | int bytes, pipefd[2]; | |
2869 | char *token, *saveptr = NULL; | |
095ead80 | 2870 | char netdev_link[IFNAMSIZ]; |
419590da | 2871 | char buffer[PATH_MAX] = {0}; |
94b1cade | 2872 | size_t retlen; |
811ef482 | 2873 | |
9c66dc4f CB |
2874 | if (netdev->type != LXC_NET_VETH) |
2875 | return log_error_errno(-1, errno, "Network type %d not support for unprivileged use", netdev->type); | |
811ef482 CB |
2876 | |
2877 | ret = pipe(pipefd); | |
9c66dc4f CB |
2878 | if (ret < 0) |
2879 | return log_error_errno(-1, errno, "Failed to create pipe"); | |
811ef482 CB |
2880 | |
2881 | child = fork(); | |
2882 | if (child < 0) { | |
811ef482 CB |
2883 | close(pipefd[0]); |
2884 | close(pipefd[1]); | |
9c66dc4f | 2885 | return log_error_errno(-1, errno, "Failed to create new process"); |
811ef482 CB |
2886 | } |
2887 | ||
2888 | if (child == 0) { | |
8335fd40 | 2889 | char pidstr[INTTYPE_TO_STRLEN(pid_t)]; |
811ef482 CB |
2890 | |
2891 | close(pipefd[0]); | |
2892 | ||
2893 | ret = dup2(pipefd[1], STDOUT_FILENO); | |
2894 | if (ret >= 0) | |
2895 | ret = dup2(pipefd[1], STDERR_FILENO); | |
2896 | close(pipefd[1]); | |
2897 | if (ret < 0) { | |
2898 | SYSERROR("Failed to duplicate std{err,out} file descriptor"); | |
78070056 | 2899 | _exit(EXIT_FAILURE); |
811ef482 CB |
2900 | } |
2901 | ||
f2711167 | 2902 | if (!is_empty_string(netdev->link)) |
9de31d5a | 2903 | retlen = strlcpy(netdev_link, netdev->link, IFNAMSIZ); |
811ef482 | 2904 | else |
9de31d5a CB |
2905 | retlen = strlcpy(netdev_link, "none", IFNAMSIZ); |
2906 | if (retlen >= IFNAMSIZ) { | |
2907 | SYSERROR("Invalid network device name"); | |
2908 | _exit(EXIT_FAILURE); | |
2909 | } | |
811ef482 | 2910 | |
8335fd40 CB |
2911 | ret = snprintf(pidstr, sizeof(pidstr), "%d", pid); |
2912 | if (ret < 0 || ret >= sizeof(pidstr)) | |
78070056 | 2913 | _exit(EXIT_FAILURE); |
8335fd40 | 2914 | pidstr[sizeof(pidstr) - 1] = '\0'; |
811ef482 CB |
2915 | |
2916 | INFO("Execing lxc-user-nic create %s %s %s veth %s %s", lxcpath, | |
2917 | lxcname, pidstr, netdev_link, | |
3473ca76 CB |
2918 | !is_empty_string(netdev->name) ? netdev->name : "(null)"); |
2919 | if (!is_empty_string(netdev->name)) | |
811ef482 CB |
2920 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "create", |
2921 | lxcpath, lxcname, pidstr, "veth", netdev_link, | |
2922 | netdev->name, (char *)NULL); | |
2923 | else | |
2924 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "create", | |
2925 | lxcpath, lxcname, pidstr, "veth", netdev_link, | |
2926 | (char *)NULL); | |
2927 | SYSERROR("Failed to execute lxc-user-nic"); | |
78070056 | 2928 | _exit(EXIT_FAILURE); |
811ef482 CB |
2929 | } |
2930 | ||
2931 | /* close the write-end of the pipe */ | |
2932 | close(pipefd[1]); | |
2933 | ||
9c66dc4f | 2934 | bytes = lxc_read_nointr(pipefd[0], &buffer, sizeof(buffer)); |
811ef482 | 2935 | if (bytes < 0) { |
74c6e2b0 | 2936 | SYSERROR("Failed to read from pipe file descriptor"); |
811ef482 | 2937 | close(pipefd[0]); |
6b9f82a9 CB |
2938 | } else { |
2939 | buffer[bytes - 1] = '\0'; | |
811ef482 | 2940 | } |
811ef482 CB |
2941 | |
2942 | ret = wait_for_pid(child); | |
2943 | close(pipefd[0]); | |
9c66dc4f CB |
2944 | if (ret != 0 || bytes < 0) |
2945 | return log_error(-1, "lxc-user-nic failed to configure requested network: %s", buffer[0] != '\0' ? buffer : "(null)"); | |
811ef482 CB |
2946 | TRACE("Received output \"%s\" from lxc-user-nic", buffer); |
2947 | ||
2948 | /* netdev->name */ | |
2949 | token = strtok_r(buffer, ":", &saveptr); | |
9c66dc4f CB |
2950 | if (!token) |
2951 | return log_error(-1, "Failed to parse lxc-user-nic output"); | |
811ef482 | 2952 | |
e389f2af CB |
2953 | /* |
2954 | * lxc-user-nic will take care of proper network device naming. So | |
2955 | * netdev->name and netdev->created_name need to be identical to not | |
2956 | * trigger another rename later on. | |
2957 | */ | |
2958 | retlen = strlcpy(netdev->name, token, IFNAMSIZ); | |
2959 | if (retlen < IFNAMSIZ) | |
2960 | retlen = strlcpy(netdev->created_name, token, IFNAMSIZ); | |
9c66dc4f CB |
2961 | if (retlen >= IFNAMSIZ) |
2962 | return log_error_errno(-1, E2BIG, "Container side veth device name returned by lxc-user-nic is too long"); | |
811ef482 | 2963 | |
74c6e2b0 | 2964 | /* netdev->ifindex */ |
811ef482 | 2965 | token = strtok_r(NULL, ":", &saveptr); |
9c66dc4f CB |
2966 | if (!token) |
2967 | return log_error(-1, "Failed to parse lxc-user-nic output"); | |
811ef482 | 2968 | |
74c6e2b0 | 2969 | ret = lxc_safe_int(token, &netdev->ifindex); |
9c66dc4f CB |
2970 | if (ret < 0) |
2971 | return log_error_errno(-1, -ret, "Failed to convert string \"%s\" to integer", token); | |
811ef482 | 2972 | |
74c6e2b0 | 2973 | /* netdev->priv.veth_attr.veth1 */ |
811ef482 | 2974 | token = strtok_r(NULL, ":", &saveptr); |
9c66dc4f CB |
2975 | if (!token) |
2976 | return log_error(-1, "Failed to parse lxc-user-nic output"); | |
811ef482 | 2977 | |
94b1cade | 2978 | retlen = strlcpy(netdev->priv.veth_attr.veth1, token, IFNAMSIZ); |
9c66dc4f CB |
2979 | if (retlen >= IFNAMSIZ) |
2980 | return log_error_errno(-1, E2BIG, "Host side veth device name returned by lxc-user-nic is too long"); | |
74c6e2b0 CB |
2981 | |
2982 | /* netdev->priv.veth_attr.ifindex */ | |
2983 | token = strtok_r(NULL, ":", &saveptr); | |
9c66dc4f CB |
2984 | if (!token) |
2985 | return log_error(-1, "Failed to parse lxc-user-nic output"); | |
74c6e2b0 CB |
2986 | |
2987 | ret = lxc_safe_int(token, &netdev->priv.veth_attr.ifindex); | |
9c66dc4f CB |
2988 | if (ret < 0) |
2989 | return log_error_errno(-1, -ret, "Failed to convert string \"%s\" to integer", token); | |
811ef482 | 2990 | |
4d781681 | 2991 | if (netdev->upscript) { |
2992 | char *argv[] = { | |
2993 | "veth", | |
2994 | netdev->link, | |
2995 | netdev->priv.veth_attr.veth1, | |
2996 | NULL, | |
2997 | }; | |
2998 | ||
e389f2af CB |
2999 | ret = run_script_argv(lxcname, hooks_version, "net", |
3000 | netdev->upscript, "up", argv); | |
4d781681 | 3001 | if (ret < 0) |
3002 | return -1; | |
3003 | } | |
3004 | ||
811ef482 CB |
3005 | return 0; |
3006 | } | |
3007 | ||
f0ecc19d | 3008 | static int lxc_delete_network_unpriv_exec(const char *lxcpath, const char *lxcname, |
1bd8d726 CB |
3009 | struct lxc_netdev *netdev, |
3010 | const char *netns_path) | |
811ef482 CB |
3011 | { |
3012 | int bytes, ret; | |
3013 | pid_t child; | |
3014 | int pipefd[2]; | |
419590da | 3015 | char buffer[PATH_MAX] = {0}; |
811ef482 | 3016 | |
9c66dc4f CB |
3017 | if (netdev->type != LXC_NET_VETH) |
3018 | return log_error_errno(-1, EINVAL, "Network type %d not support for unprivileged use", netdev->type); | |
811ef482 CB |
3019 | |
3020 | ret = pipe(pipefd); | |
9c66dc4f CB |
3021 | if (ret < 0) |
3022 | return log_error_errno(-1, errno, "Failed to create pipe"); | |
811ef482 CB |
3023 | |
3024 | child = fork(); | |
3025 | if (child < 0) { | |
811ef482 CB |
3026 | close(pipefd[0]); |
3027 | close(pipefd[1]); | |
9c66dc4f | 3028 | return log_error_errno(-1, errno, "Failed to create new process"); |
811ef482 CB |
3029 | } |
3030 | ||
3031 | if (child == 0) { | |
8843fde4 | 3032 | char *hostveth; |
811ef482 CB |
3033 | |
3034 | close(pipefd[0]); | |
3035 | ||
3036 | ret = dup2(pipefd[1], STDOUT_FILENO); | |
3037 | if (ret >= 0) | |
3038 | ret = dup2(pipefd[1], STDERR_FILENO); | |
3039 | close(pipefd[1]); | |
3040 | if (ret < 0) { | |
3041 | SYSERROR("Failed to duplicate std{err,out} file descriptor"); | |
a30b9023 | 3042 | _exit(EXIT_FAILURE); |
811ef482 CB |
3043 | } |
3044 | ||
f2711167 | 3045 | if (!is_empty_string(netdev->priv.veth_attr.pair)) |
8843fde4 CB |
3046 | hostveth = netdev->priv.veth_attr.pair; |
3047 | else | |
3048 | hostveth = netdev->priv.veth_attr.veth1; | |
f2711167 | 3049 | if (is_empty_string(hostveth)) { |
74c6e2b0 | 3050 | SYSERROR("Host side veth device name is missing"); |
a30b9023 | 3051 | _exit(EXIT_FAILURE); |
74c6e2b0 CB |
3052 | } |
3053 | ||
f2711167 CB |
3054 | if (is_empty_string(netdev->link)) { |
3055 | SYSERROR("Network link for network device \"%s\" is missing", netdev->priv.veth_attr.veth1); | |
a30b9023 | 3056 | _exit(EXIT_FAILURE); |
74c6e2b0 | 3057 | } |
811ef482 | 3058 | |
811ef482 | 3059 | INFO("Execing lxc-user-nic delete %s %s %s veth %s %s", lxcpath, |
8843fde4 | 3060 | lxcname, netns_path, netdev->link, hostveth); |
811ef482 | 3061 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "delete", lxcpath, |
8843fde4 CB |
3062 | lxcname, netns_path, "veth", netdev->link, hostveth, |
3063 | (char *)NULL); | |
811ef482 | 3064 | SYSERROR("Failed to exec lxc-user-nic."); |
a30b9023 | 3065 | _exit(EXIT_FAILURE); |
811ef482 CB |
3066 | } |
3067 | ||
3068 | close(pipefd[1]); | |
3069 | ||
9c66dc4f | 3070 | bytes = lxc_read_nointr(pipefd[0], &buffer, sizeof(buffer)); |
811ef482 CB |
3071 | if (bytes < 0) { |
3072 | SYSERROR("Failed to read from pipe file descriptor."); | |
3073 | close(pipefd[0]); | |
6b9f82a9 CB |
3074 | } else { |
3075 | buffer[bytes - 1] = '\0'; | |
811ef482 | 3076 | } |
811ef482 | 3077 | |
6b9f82a9 | 3078 | ret = wait_for_pid(child); |
9c66dc4f CB |
3079 | close_prot_errno_disarm(pipefd[0]); |
3080 | if (ret != 0 || bytes < 0) | |
3081 | return log_error_errno(-1, errno, "lxc-user-nic failed to delete requested network: %s", | |
3082 | !is_empty_string(buffer) ? buffer : "(null)"); | |
811ef482 | 3083 | |
811ef482 CB |
3084 | return 0; |
3085 | } | |
3086 | ||
59eac805 | 3087 | static bool lxc_delete_network_unpriv(struct lxc_handler *handler) |
1bd8d726 CB |
3088 | { |
3089 | int ret; | |
3090 | struct lxc_list *iterator; | |
3091 | struct lxc_list *network = &handler->conf->network; | |
3092 | /* strlen("/proc/") = 6 | |
3093 | * + | |
8335fd40 | 3094 | * INTTYPE_TO_STRLEN(pid_t) |
1bd8d726 CB |
3095 | * + |
3096 | * strlen("/fd/") = 4 | |
3097 | * + | |
8335fd40 | 3098 | * INTTYPE_TO_STRLEN(int) |
1bd8d726 CB |
3099 | * + |
3100 | * \0 | |
3101 | */ | |
8335fd40 | 3102 | char netns_path[6 + INTTYPE_TO_STRLEN(pid_t) + 4 + INTTYPE_TO_STRLEN(int) + 1]; |
1bd8d726 CB |
3103 | |
3104 | *netns_path = '\0'; | |
3105 | ||
9c66dc4f CB |
3106 | if (handler->nsfd[LXC_NS_NET] < 0) |
3107 | return log_debug(false, "Cannot not guarantee safe deletion of network devices. Manual cleanup maybe needed"); | |
1bd8d726 CB |
3108 | |
3109 | ret = snprintf(netns_path, sizeof(netns_path), "/proc/%d/fd/%d", | |
0059379f | 3110 | lxc_raw_getpid(), handler->nsfd[LXC_NS_NET]); |
1bd8d726 CB |
3111 | if (ret < 0 || ret >= sizeof(netns_path)) |
3112 | return false; | |
3113 | ||
3114 | lxc_list_for_each(iterator, network) { | |
3115 | char *hostveth = NULL; | |
3116 | struct lxc_netdev *netdev = iterator->elem; | |
3117 | ||
3118 | /* We can only delete devices whose ifindex we have. If we don't | |
3119 | * have the index it means that we didn't create it. | |
3120 | */ | |
3121 | if (!netdev->ifindex) | |
3122 | continue; | |
3123 | ||
3124 | if (netdev->type == LXC_NET_PHYS) { | |
3125 | ret = lxc_netdev_rename_by_index(netdev->ifindex, | |
3126 | netdev->link); | |
3127 | if (ret < 0) | |
9c66dc4f | 3128 | WARN("Failed to rename interface with index %d to its initial name \"%s\"", |
1bd8d726 CB |
3129 | netdev->ifindex, netdev->link); |
3130 | else | |
9c66dc4f | 3131 | TRACE("Renamed interface with index %d to its initial name \"%s\"", |
1bd8d726 | 3132 | netdev->ifindex, netdev->link); |
b3259dc6 TP |
3133 | |
3134 | ret = netdev_deconf[netdev->type](handler, netdev); | |
40a22043 CB |
3135 | if (ret < 0) |
3136 | WARN("Failed to deconfigure interface with index %d and initial name \"%s\"", | |
3137 | netdev->ifindex, netdev->link); | |
66a7c406 | 3138 | goto clear_ifindices; |
1bd8d726 CB |
3139 | } |
3140 | ||
3141 | ret = netdev_deconf[netdev->type](handler, netdev); | |
3142 | if (ret < 0) | |
3143 | WARN("Failed to deconfigure network device"); | |
3144 | ||
3145 | if (netdev->type != LXC_NET_VETH) | |
66a7c406 | 3146 | goto clear_ifindices; |
1bd8d726 | 3147 | |
f2711167 | 3148 | if (is_empty_string(netdev->link) || !is_ovs_bridge(netdev->link)) |
66a7c406 | 3149 | goto clear_ifindices; |
1bd8d726 | 3150 | |
f2711167 | 3151 | if (!is_empty_string(netdev->priv.veth_attr.pair)) |
8843fde4 CB |
3152 | hostveth = netdev->priv.veth_attr.pair; |
3153 | else | |
3154 | hostveth = netdev->priv.veth_attr.veth1; | |
f2711167 | 3155 | if (is_empty_string(hostveth)) |
66a7c406 | 3156 | goto clear_ifindices; |
8843fde4 | 3157 | |
1bd8d726 CB |
3158 | ret = lxc_delete_network_unpriv_exec(handler->lxcpath, |
3159 | handler->name, netdev, | |
3160 | netns_path); | |
3161 | if (ret < 0) { | |
9c66dc4f | 3162 | WARN("Failed to remove port \"%s\" from openvswitch bridge \"%s\"", hostveth, netdev->link); |
66a7c406 | 3163 | goto clear_ifindices; |
1bd8d726 | 3164 | } |
9c66dc4f | 3165 | INFO("Removed interface \"%s\" from \"%s\"", hostveth, netdev->link); |
66a7c406 CB |
3166 | |
3167 | clear_ifindices: | |
0858c829 CB |
3168 | /* |
3169 | * We need to clear any ifindices we recorded so liblxc won't | |
3170 | * have cached stale data which would cause it to fail on | |
3171 | * reboot where we don't re-read the on-disk config file. | |
66a7c406 CB |
3172 | */ |
3173 | netdev->ifindex = 0; | |
3174 | if (netdev->type == LXC_NET_PHYS) { | |
3175 | netdev->priv.phys_attr.ifindex = 0; | |
3176 | } else if (netdev->type == LXC_NET_VETH) { | |
3177 | netdev->priv.veth_attr.veth1[0] = '\0'; | |
3178 | netdev->priv.veth_attr.ifindex = 0; | |
3179 | } | |
1bd8d726 CB |
3180 | } |
3181 | ||
bb84beda | 3182 | return true; |
1bd8d726 CB |
3183 | } |
3184 | ||
6509154d | 3185 | static int lxc_setup_l2proxy(struct lxc_netdev *netdev) { |
3186 | struct lxc_list *cur, *next; | |
3187 | struct lxc_inetdev *inet4dev; | |
3188 | struct lxc_inet6dev *inet6dev; | |
3189 | char bufinet4[INET_ADDRSTRLEN], bufinet6[INET6_ADDRSTRLEN]; | |
b670016a | 3190 | int err = 0; |
5fe147e9 TP |
3191 | unsigned int lo_ifindex = 0, link_ifindex = 0; |
3192 | ||
3193 | link_ifindex = if_nametoindex(netdev->link); | |
9c66dc4f CB |
3194 | if (link_ifindex == 0) |
3195 | return log_error_errno(-1, errno, "Failed to retrieve ifindex for \"%s\" l2proxy setup", netdev->link); | |
5fe147e9 | 3196 | |
6509154d | 3197 | |
3198 | /* If IPv4 addresses are specified, then check that sysctl is configured correctly. */ | |
3199 | if (!lxc_list_empty(&netdev->ipv4)) { | |
3200 | /* Check for net.ipv4.conf.[link].forwarding=1 */ | |
9c66dc4f CB |
3201 | if (lxc_is_ip_forwarding_enabled(netdev->link, AF_INET) < 0) |
3202 | return log_error_errno(-1, EINVAL, "Requires sysctl net.ipv4.conf.%s.forwarding=1", netdev->link); | |
6509154d | 3203 | } |
3204 | ||
3205 | /* If IPv6 addresses are specified, then check that sysctl is configured correctly. */ | |
3206 | if (!lxc_list_empty(&netdev->ipv6)) { | |
3207 | /* Check for net.ipv6.conf.[link].proxy_ndp=1 */ | |
9c66dc4f CB |
3208 | if (lxc_is_ip_neigh_proxy_enabled(netdev->link, AF_INET6) < 0) |
3209 | return log_error_errno(-1, EINVAL, "Requires sysctl net.ipv6.conf.%s.proxy_ndp=1", netdev->link); | |
6509154d | 3210 | |
3211 | /* Check for net.ipv6.conf.[link].forwarding=1 */ | |
9c66dc4f CB |
3212 | if (lxc_is_ip_forwarding_enabled(netdev->link, AF_INET6) < 0) |
3213 | return log_error_errno(-1, EINVAL, "Requires sysctl net.ipv6.conf.%s.forwarding=1", netdev->link); | |
6509154d | 3214 | } |
3215 | ||
b670016a | 3216 | /* Perform IPVLAN specific checks. */ |
3217 | if (netdev->type == LXC_NET_IPVLAN) { | |
3218 | /* Check mode is l3s as other modes do not work with l2proxy. */ | |
9c66dc4f CB |
3219 | if (netdev->priv.ipvlan_attr.mode != IPVLAN_MODE_L3S) |
3220 | return log_error_errno(-1, EINVAL, "Requires ipvlan mode on dev \"%s\" be l3s when used with l2proxy", netdev->link); | |
b670016a | 3221 | |
3222 | /* Retrieve local-loopback interface index for use with IPVLAN static routes. */ | |
3ebffb98 | 3223 | lo_ifindex = if_nametoindex(loop_device); |
9c66dc4f CB |
3224 | if (lo_ifindex == 0) |
3225 | return log_error_errno(-1, EINVAL, "Failed to retrieve ifindex for \"%s\" routing cleanup", loop_device); | |
b670016a | 3226 | } |
3227 | ||
6509154d | 3228 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { |
3229 | inet4dev = cur->elem; | |
3230 | if (!inet_ntop(AF_INET, &inet4dev->addr, bufinet4, sizeof(bufinet4))) | |
596a002c | 3231 | return ret_set_errno(-1, -errno); |
6509154d | 3232 | |
5fe147e9 | 3233 | if (lxc_ip_neigh_proxy(RTM_NEWNEIGH, AF_INET, link_ifindex, &inet4dev->addr) < 0) |
596a002c | 3234 | return ret_set_errno(-1, EINVAL); |
b670016a | 3235 | |
3236 | /* IPVLAN requires a route to local-loopback to trigger l2proxy. */ | |
3237 | if (netdev->type == LXC_NET_IPVLAN) { | |
3238 | err = lxc_ipv4_dest_add(lo_ifindex, &inet4dev->addr, 32); | |
9c66dc4f CB |
3239 | if (err < 0) |
3240 | return log_error_errno(-1, -err, "Failed to add ipv4 dest \"%s\" for network device \"%s\"", bufinet4, loop_device); | |
b670016a | 3241 | } |
6509154d | 3242 | } |
3243 | ||
3244 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
3245 | inet6dev = cur->elem; | |
3246 | if (!inet_ntop(AF_INET6, &inet6dev->addr, bufinet6, sizeof(bufinet6))) | |
596a002c | 3247 | return ret_set_errno(-1, -errno); |
6509154d | 3248 | |
5fe147e9 | 3249 | if (lxc_ip_neigh_proxy(RTM_NEWNEIGH, AF_INET6, link_ifindex, &inet6dev->addr) < 0) |
596a002c | 3250 | return ret_set_errno(-1, EINVAL); |
b670016a | 3251 | |
3252 | /* IPVLAN requires a route to local-loopback to trigger l2proxy. */ | |
3253 | if (netdev->type == LXC_NET_IPVLAN) { | |
3254 | err = lxc_ipv6_dest_add(lo_ifindex, &inet6dev->addr, 128); | |
9c66dc4f CB |
3255 | if (err < 0) |
3256 | return log_error_errno(-1, -err, "Failed to add ipv6 dest \"%s\" for network device \"%s\"", bufinet6, loop_device); | |
b670016a | 3257 | } |
6509154d | 3258 | } |
3259 | ||
3260 | return 0; | |
3261 | } | |
3262 | ||
9c66dc4f CB |
3263 | static int lxc_delete_ipv4_l2proxy(struct in_addr *ip, char *link, unsigned int lo_ifindex) |
3264 | { | |
b670016a | 3265 | char bufinet4[INET_ADDRSTRLEN]; |
9c66dc4f CB |
3266 | bool had_error = false; |
3267 | unsigned int link_ifindex = 0; | |
b670016a | 3268 | |
9c66dc4f CB |
3269 | if (!inet_ntop(AF_INET, ip, bufinet4, sizeof(bufinet4))) |
3270 | return log_error_errno(-1, EINVAL, "Failed to convert IP for l2proxy ipv4 removal on dev \"%s\"", link); | |
b670016a | 3271 | |
3272 | /* If a local-loopback ifindex supplied remove the static route to the lo device. */ | |
3273 | if (lo_ifindex > 0) { | |
3274 | if (lxc_ipv4_dest_del(lo_ifindex, ip, 32) < 0) { | |
9c66dc4f | 3275 | had_error = true; |
b670016a | 3276 | ERROR("Failed to delete ipv4 dest \"%s\" for network ifindex \"%u\"", bufinet4, lo_ifindex); |
3277 | } | |
3278 | } | |
3279 | ||
3280 | /* If link is supplied remove the IP neigh proxy entry for this IP on the device. */ | |
f2711167 | 3281 | if (!is_empty_string(link)) { |
5fe147e9 | 3282 | link_ifindex = if_nametoindex(link); |
9c66dc4f CB |
3283 | if (link_ifindex == 0) |
3284 | return log_error_errno(-1, EINVAL, "Failed to retrieve ifindex for \"%s\" l2proxy cleanup", link); | |
5fe147e9 TP |
3285 | |
3286 | if (lxc_ip_neigh_proxy(RTM_DELNEIGH, AF_INET, link_ifindex, ip) < 0) | |
9c66dc4f | 3287 | had_error = true; |
b670016a | 3288 | } |
3289 | ||
9c66dc4f | 3290 | if (had_error) |
596a002c | 3291 | return ret_set_errno(-1, EINVAL); |
b670016a | 3292 | |
3293 | return 0; | |
3294 | } | |
3295 | ||
9c66dc4f CB |
3296 | static int lxc_delete_ipv6_l2proxy(struct in6_addr *ip, char *link, unsigned int lo_ifindex) |
3297 | { | |
b670016a | 3298 | char bufinet6[INET6_ADDRSTRLEN]; |
9c66dc4f CB |
3299 | bool had_error = false; |
3300 | unsigned int link_ifindex = 0; | |
b670016a | 3301 | |
9c66dc4f CB |
3302 | if (!inet_ntop(AF_INET6, ip, bufinet6, sizeof(bufinet6))) |
3303 | return log_error_errno(-1, EINVAL, "Failed to convert IP for l2proxy ipv6 removal on dev \"%s\"", link); | |
b670016a | 3304 | |
3305 | /* If a local-loopback ifindex supplied remove the static route to the lo device. */ | |
3306 | if (lo_ifindex > 0) { | |
3307 | if (lxc_ipv6_dest_del(lo_ifindex, ip, 128) < 0) { | |
9c66dc4f | 3308 | had_error = true; |
b670016a | 3309 | ERROR("Failed to delete ipv6 dest \"%s\" for network ifindex \"%u\"", bufinet6, lo_ifindex); |
3310 | } | |
3311 | } | |
3312 | ||
3313 | /* If link is supplied remove the IP neigh proxy entry for this IP on the device. */ | |
f2711167 | 3314 | if (!is_empty_string(link)) { |
5fe147e9 TP |
3315 | link_ifindex = if_nametoindex(link); |
3316 | if (link_ifindex == 0) { | |
3317 | ERROR("Failed to retrieve ifindex for \"%s\" l2proxy cleanup", link); | |
3318 | return ret_set_errno(-1, EINVAL); | |
3319 | } | |
3320 | ||
3321 | if (lxc_ip_neigh_proxy(RTM_DELNEIGH, AF_INET6, link_ifindex, ip) < 0) | |
9c66dc4f | 3322 | had_error = true; |
b670016a | 3323 | } |
3324 | ||
9c66dc4f | 3325 | if (had_error) |
596a002c | 3326 | return ret_set_errno(-1, EINVAL); |
b670016a | 3327 | |
3328 | return 0; | |
3329 | } | |
3330 | ||
6509154d | 3331 | static int lxc_delete_l2proxy(struct lxc_netdev *netdev) { |
b670016a | 3332 | unsigned int lo_ifindex = 0; |
3333 | unsigned int errCount = 0; | |
6509154d | 3334 | struct lxc_list *cur, *next; |
3335 | struct lxc_inetdev *inet4dev; | |
3336 | struct lxc_inet6dev *inet6dev; | |
6509154d | 3337 | |
b670016a | 3338 | /* Perform IPVLAN specific checks. */ |
3339 | if (netdev->type == LXC_NET_IPVLAN) { | |
3340 | /* Retrieve local-loopback interface index for use with IPVLAN static routes. */ | |
3ebffb98 | 3341 | lo_ifindex = if_nametoindex(loop_device); |
b670016a | 3342 | if (lo_ifindex == 0) { |
3343 | errCount++; | |
3ebffb98 | 3344 | ERROR("Failed to retrieve ifindex for \"%s\" routing cleanup", loop_device); |
6509154d | 3345 | } |
b670016a | 3346 | } |
6509154d | 3347 | |
b670016a | 3348 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { |
3349 | inet4dev = cur->elem; | |
3350 | if (lxc_delete_ipv4_l2proxy(&inet4dev->addr, netdev->link, lo_ifindex) < 0) | |
3351 | errCount++; | |
6509154d | 3352 | } |
3353 | ||
3354 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
3355 | inet6dev = cur->elem; | |
b670016a | 3356 | if (lxc_delete_ipv6_l2proxy(&inet6dev->addr, netdev->link, lo_ifindex) < 0) |
3357 | errCount++; | |
6509154d | 3358 | } |
3359 | ||
b670016a | 3360 | if (errCount > 0) |
596a002c | 3361 | return ret_set_errno(-1, EINVAL); |
6509154d | 3362 | |
3363 | return 0; | |
3364 | } | |
3365 | ||
e389f2af | 3366 | static int lxc_create_network_priv(struct lxc_handler *handler) |
811ef482 | 3367 | { |
811ef482 CB |
3368 | struct lxc_list *iterator; |
3369 | struct lxc_list *network = &handler->conf->network; | |
3370 | ||
811ef482 CB |
3371 | lxc_list_for_each(iterator, network) { |
3372 | struct lxc_netdev *netdev = iterator->elem; | |
3373 | ||
9c66dc4f CB |
3374 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) |
3375 | return log_error_errno(-1, EINVAL, "Invalid network configuration type %d", netdev->type); | |
811ef482 | 3376 | |
6509154d | 3377 | /* Setup l2proxy entries if enabled and used with a link property */ |
f2711167 | 3378 | if (netdev->l2proxy && !is_empty_string(netdev->link)) { |
9c66dc4f CB |
3379 | if (lxc_setup_l2proxy(netdev)) |
3380 | return log_error_errno(-1, errno, "Failed to setup l2proxy"); | |
6509154d | 3381 | } |
3382 | ||
9c66dc4f CB |
3383 | if (netdev_conf[netdev->type](handler, netdev)) |
3384 | return log_error_errno(-1, errno, "Failed to create network device"); | |
811ef482 CB |
3385 | } |
3386 | ||
3387 | return 0; | |
3388 | } | |
3389 | ||
e389f2af | 3390 | int lxc_network_move_created_netdev_priv(struct lxc_handler *handler) |
811ef482 | 3391 | { |
e389f2af CB |
3392 | pid_t pid = handler->pid; |
3393 | struct lxc_list *network = &handler->conf->network; | |
811ef482 CB |
3394 | struct lxc_list *iterator; |
3395 | ||
e0010464 | 3396 | if (am_guest_unpriv()) |
74c6e2b0 | 3397 | return 0; |
811ef482 CB |
3398 | |
3399 | lxc_list_for_each(iterator, network) { | |
3dd78294 | 3400 | __do_free char *physname = NULL; |
e389f2af | 3401 | int ret; |
811ef482 CB |
3402 | struct lxc_netdev *netdev = iterator->elem; |
3403 | ||
811ef482 CB |
3404 | if (!netdev->ifindex) |
3405 | continue; | |
3406 | ||
3dd78294 CB |
3407 | if (netdev->type == LXC_NET_PHYS) |
3408 | physname = is_wlan(netdev->link); | |
3409 | ||
3410 | if (physname) | |
9f8cf6e1 | 3411 | ret = lxc_netdev_move_wlan(physname, netdev->link, pid, NULL); |
3dd78294 | 3412 | else |
9f8cf6e1 | 3413 | ret = lxc_netdev_move_by_index(netdev->ifindex, pid, NULL); |
9c66dc4f CB |
3414 | if (ret) |
3415 | return log_error_errno(-1, -ret, "Failed to move network device \"%s\" with ifindex %d to network namespace %d", | |
3416 | netdev->created_name, | |
3417 | netdev->ifindex, pid); | |
811ef482 | 3418 | |
24190194 CB |
3419 | DEBUG("Moved network device \"%s\" with ifindex %d to network namespace of %d", |
3420 | netdev->created_name, netdev->ifindex, pid); | |
811ef482 CB |
3421 | } |
3422 | ||
3423 | return 0; | |
3424 | } | |
3425 | ||
3c09b97c CB |
3426 | static int network_requires_advanced_setup(int type) |
3427 | { | |
3428 | if (type == LXC_NET_EMPTY) | |
3429 | return false; | |
3430 | ||
3431 | if (type == LXC_NET_NONE) | |
3432 | return false; | |
3433 | ||
3434 | return true; | |
3435 | } | |
3436 | ||
e389f2af | 3437 | static int lxc_create_network_unpriv(struct lxc_handler *handler) |
74c6e2b0 | 3438 | { |
e389f2af CB |
3439 | int hooks_version = handler->conf->hooks_version; |
3440 | const char *lxcname = handler->name; | |
3441 | const char *lxcpath = handler->lxcpath; | |
3442 | struct lxc_list *network = &handler->conf->network; | |
3443 | pid_t pid = handler->pid; | |
74c6e2b0 CB |
3444 | struct lxc_list *iterator; |
3445 | ||
74c6e2b0 CB |
3446 | lxc_list_for_each(iterator, network) { |
3447 | struct lxc_netdev *netdev = iterator->elem; | |
3448 | ||
3c09b97c | 3449 | if (!network_requires_advanced_setup(netdev->type)) |
74c6e2b0 CB |
3450 | continue; |
3451 | ||
9c66dc4f CB |
3452 | if (netdev->type != LXC_NET_VETH) |
3453 | return log_error_errno(-1, EINVAL, "Networks of type %s are not supported by unprivileged containers", | |
3454 | lxc_net_type_to_str(netdev->type)); | |
74c6e2b0 CB |
3455 | |
3456 | if (netdev->mtu) | |
3457 | INFO("mtu ignored due to insufficient privilege"); | |
3458 | ||
e389f2af CB |
3459 | if (lxc_create_network_unpriv_exec(lxcpath, lxcname, netdev, |
3460 | pid, hooks_version)) | |
74c6e2b0 CB |
3461 | return -1; |
3462 | } | |
3463 | ||
3464 | return 0; | |
3465 | } | |
3466 | ||
59eac805 | 3467 | static bool lxc_delete_network_priv(struct lxc_handler *handler) |
811ef482 CB |
3468 | { |
3469 | int ret; | |
3470 | struct lxc_list *iterator; | |
3471 | struct lxc_list *network = &handler->conf->network; | |
1bd8d726 | 3472 | |
811ef482 CB |
3473 | lxc_list_for_each(iterator, network) { |
3474 | char *hostveth = NULL; | |
3475 | struct lxc_netdev *netdev = iterator->elem; | |
3476 | ||
3477 | /* We can only delete devices whose ifindex we have. If we don't | |
3478 | * have the index it means that we didn't create it. | |
3479 | */ | |
3480 | if (!netdev->ifindex) | |
3481 | continue; | |
3482 | ||
0104c121 CB |
3483 | /* |
3484 | * If the network device has been moved back from the | |
3485 | * containers network namespace, update the ifindex. | |
3486 | */ | |
3487 | netdev->ifindex = if_nametoindex(netdev->name); | |
3488 | ||
6509154d | 3489 | /* Delete l2proxy entries if enabled and used with a link property */ |
f2711167 | 3490 | if (netdev->l2proxy && !is_empty_string(netdev->link)) { |
6509154d | 3491 | if (lxc_delete_l2proxy(netdev)) |
3492 | WARN("Failed to delete all l2proxy config"); | |
3493 | /* Don't return, let the network be cleaned up as normal. */ | |
3494 | } | |
3495 | ||
811ef482 CB |
3496 | if (netdev->type == LXC_NET_PHYS) { |
3497 | ret = lxc_netdev_rename_by_index(netdev->ifindex, netdev->link); | |
3498 | if (ret < 0) | |
3499 | WARN("Failed to rename interface with index %d " | |
b809f232 CB |
3500 | "from \"%s\" to its initial name \"%s\"", |
3501 | netdev->ifindex, netdev->name, netdev->link); | |
0b154989 | 3502 | else { |
29589196 CB |
3503 | TRACE("Renamed interface with index %d from " |
3504 | "\"%s\" to its initial name \"%s\"", | |
3505 | netdev->ifindex, netdev->name, | |
3506 | netdev->link); | |
0b154989 TP |
3507 | |
3508 | /* Restore original MTU */ | |
3509 | ret = lxc_netdev_set_mtu(netdev->link, netdev->priv.phys_attr.mtu); | |
3510 | if (ret < 0) { | |
3511 | WARN("Failed to set interface \"%s\" to its initial mtu \"%d\"", | |
3512 | netdev->link, netdev->priv.phys_attr.mtu); | |
3513 | } else { | |
3514 | TRACE("Restored interface \"%s\" to its initial mtu \"%d\"", | |
3515 | netdev->link, netdev->priv.phys_attr.mtu); | |
3516 | } | |
3517 | } | |
b3259dc6 TP |
3518 | |
3519 | ret = netdev_deconf[netdev->type](handler, netdev); | |
40a22043 CB |
3520 | if (ret < 0) |
3521 | WARN("Failed to deconfigure interface with index %d and initial name \"%s\"", | |
3522 | netdev->ifindex, netdev->link); | |
66a7c406 | 3523 | goto clear_ifindices; |
811ef482 CB |
3524 | } |
3525 | ||
3526 | ret = netdev_deconf[netdev->type](handler, netdev); | |
3527 | if (ret < 0) | |
3528 | WARN("Failed to deconfigure network device"); | |
3529 | ||
811ef482 | 3530 | if (netdev->type != LXC_NET_VETH) |
66a7c406 | 3531 | goto clear_ifindices; |
811ef482 | 3532 | |
811ef482 CB |
3533 | /* Explicitly delete host veth device to prevent lingering |
3534 | * devices. We had issues in LXD around this. | |
3535 | */ | |
f2711167 | 3536 | if (!is_empty_string(netdev->priv.veth_attr.pair)) |
811ef482 CB |
3537 | hostveth = netdev->priv.veth_attr.pair; |
3538 | else | |
3539 | hostveth = netdev->priv.veth_attr.veth1; | |
f2711167 | 3540 | if (is_empty_string(hostveth)) |
66a7c406 | 3541 | goto clear_ifindices; |
811ef482 | 3542 | |
1ee56cff CB |
3543 | if (is_empty_string(netdev->link) || !is_ovs_bridge(netdev->link)) { |
3544 | ret = lxc_netdev_delete_by_name(hostveth); | |
3545 | if (ret < 0) | |
3546 | WARN("Failed to remove interface \"%s\" from \"%s\"", hostveth, netdev->link); | |
811ef482 | 3547 | |
1ee56cff CB |
3548 | INFO("Removed interface \"%s\" from \"%s\"", hostveth, netdev->link); |
3549 | } else if (!is_empty_string(netdev->link)) { | |
3550 | ret = lxc_ovs_delete_port(netdev->link, hostveth); | |
3551 | if (ret < 0) | |
3552 | WARN("Failed to remove port \"%s\" from openvswitch bridge \"%s\"", hostveth, netdev->link); | |
811ef482 | 3553 | |
1ee56cff CB |
3554 | INFO("Removed port \"%s\" from openvswitch bridge \"%s\"", hostveth, netdev->link); |
3555 | } | |
811ef482 | 3556 | |
66a7c406 | 3557 | clear_ifindices: |
ad2ddfcd | 3558 | /* We need to clear any ifindices we recorded so liblxc won't |
66a7c406 CB |
3559 | * have cached stale data which would cause it to fail on reboot |
3560 | * we're we don't re-read the on-disk config file. | |
3561 | */ | |
3562 | netdev->ifindex = 0; | |
3563 | if (netdev->type == LXC_NET_PHYS) { | |
3564 | netdev->priv.phys_attr.ifindex = 0; | |
3565 | } else if (netdev->type == LXC_NET_VETH) { | |
3566 | netdev->priv.veth_attr.veth1[0] = '\0'; | |
3567 | netdev->priv.veth_attr.ifindex = 0; | |
3568 | } | |
811ef482 CB |
3569 | } |
3570 | ||
bb84beda | 3571 | return true; |
811ef482 CB |
3572 | } |
3573 | ||
3574 | int lxc_requests_empty_network(struct lxc_handler *handler) | |
3575 | { | |
3576 | struct lxc_list *network = &handler->conf->network; | |
3577 | struct lxc_list *iterator; | |
3578 | bool found_none = false, found_nic = false; | |
3579 | ||
3580 | if (lxc_list_empty(network)) | |
3581 | return 0; | |
3582 | ||
9c66dc4f | 3583 | lxc_list_for_each (iterator, network) { |
811ef482 CB |
3584 | struct lxc_netdev *netdev = iterator->elem; |
3585 | ||
3586 | if (netdev->type == LXC_NET_NONE) | |
3587 | found_none = true; | |
3588 | else | |
3589 | found_nic = true; | |
3590 | } | |
9c66dc4f | 3591 | |
811ef482 CB |
3592 | if (found_none && !found_nic) |
3593 | return 1; | |
9c66dc4f | 3594 | |
811ef482 CB |
3595 | return 0; |
3596 | } | |
3597 | ||
3598 | /* try to move physical nics to the init netns */ | |
b809f232 | 3599 | int lxc_restore_phys_nics_to_netns(struct lxc_handler *handler) |
811ef482 | 3600 | { |
9c66dc4f CB |
3601 | __do_close int oldfd = -EBADF; |
3602 | int netnsfd = handler->nsfd[LXC_NS_NET]; | |
3603 | struct lxc_conf *conf = handler->conf; | |
811ef482 | 3604 | int ret; |
811ef482 | 3605 | char ifname[IFNAMSIZ]; |
b809f232 | 3606 | struct lxc_list *iterator; |
811ef482 | 3607 | |
04213960 TA |
3608 | /* |
3609 | * If we weren't asked to clone a new network namespace, there's | |
3610 | * nothing to restore. | |
3611 | */ | |
3612 | if (!(handler->ns_clone_flags & CLONE_NEWNET)) | |
3613 | return 0; | |
3614 | ||
b809f232 CB |
3615 | /* We need CAP_NET_ADMIN in the parent namespace in order to setns() to |
3616 | * the parent network namespace. We won't have this capability if we are | |
3617 | * unprivileged. | |
3618 | */ | |
d0fbc7ba | 3619 | if (!handler->am_root) |
b809f232 | 3620 | return 0; |
811ef482 | 3621 | |
b809f232 | 3622 | TRACE("Moving physical network devices back to parent network namespace"); |
811ef482 | 3623 | |
0037ab49 | 3624 | oldfd = lxc_preserve_ns(handler->monitor_pid, "net"); |
9c66dc4f CB |
3625 | if (oldfd < 0) |
3626 | return log_error_errno(-1, errno, "Failed to preserve network namespace"); | |
811ef482 | 3627 | |
b809f232 | 3628 | ret = setns(netnsfd, CLONE_NEWNET); |
9c66dc4f CB |
3629 | if (ret < 0) |
3630 | return log_error_errno(-1, errno, "Failed to enter network namespace"); | |
811ef482 | 3631 | |
b809f232 CB |
3632 | lxc_list_for_each(iterator, &conf->network) { |
3633 | struct lxc_netdev *netdev = iterator->elem; | |
811ef482 | 3634 | |
b809f232 CB |
3635 | if (netdev->type != LXC_NET_PHYS) |
3636 | continue; | |
3637 | ||
3638 | /* Retrieve the name of the interface in the container's network | |
3639 | * namespace. | |
3640 | */ | |
3641 | if (!if_indextoname(netdev->ifindex, ifname)) { | |
9c66dc4f | 3642 | WARN("No interface corresponding to ifindex %d", netdev->ifindex); |
811ef482 CB |
3643 | continue; |
3644 | } | |
b809f232 | 3645 | |
0037ab49 | 3646 | ret = lxc_netdev_move_by_index_fd(netdev->ifindex, oldfd, netdev->link); |
b809f232 | 3647 | if (ret < 0) |
9c66dc4f | 3648 | WARN("Error moving network device \"%s\" back to network namespace", ifname); |
b809f232 | 3649 | else |
9c66dc4f | 3650 | TRACE("Moved network device \"%s\" back to network namespace", ifname); |
811ef482 | 3651 | } |
811ef482 | 3652 | |
b809f232 | 3653 | ret = setns(oldfd, CLONE_NEWNET); |
9c66dc4f CB |
3654 | if (ret < 0) |
3655 | return log_error_errno(-1, errno, "Failed to enter network namespace"); | |
b809f232 CB |
3656 | |
3657 | return 0; | |
811ef482 CB |
3658 | } |
3659 | ||
3660 | static int setup_hw_addr(char *hwaddr, const char *ifname) | |
3661 | { | |
9c66dc4f | 3662 | __do_close int fd = -EBADF; |
811ef482 CB |
3663 | struct sockaddr sockaddr; |
3664 | struct ifreq ifr; | |
9c66dc4f | 3665 | int ret; |
811ef482 CB |
3666 | |
3667 | ret = lxc_convert_mac(hwaddr, &sockaddr); | |
9c66dc4f CB |
3668 | if (ret) |
3669 | return log_error_errno(-1, -ret, "Mac address \"%s\" conversion failed", hwaddr); | |
811ef482 CB |
3670 | |
3671 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
3672 | ifr.ifr_name[IFNAMSIZ-1] = '\0'; | |
3673 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
3674 | ||
ad9429e5 | 3675 | fd = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0); |
811ef482 CB |
3676 | if (fd < 0) |
3677 | return -1; | |
3678 | ||
3679 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
811ef482 | 3680 | if (ret) |
6d1400b5 | 3681 | SYSERROR("Failed to perform ioctl"); |
3682 | ||
9c66dc4f | 3683 | DEBUG("Mac address \"%s\" on \"%s\" has been setup", hwaddr, ifr.ifr_name); |
811ef482 CB |
3684 | |
3685 | return ret; | |
3686 | } | |
3687 | ||
3688 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) | |
3689 | { | |
3690 | struct lxc_list *iterator; | |
3691 | int err; | |
3692 | ||
3693 | lxc_list_for_each(iterator, ip) { | |
3694 | struct lxc_inetdev *inetdev = iterator->elem; | |
3695 | ||
3696 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, | |
3697 | &inetdev->bcast, inetdev->prefix); | |
9c66dc4f CB |
3698 | if (err) |
3699 | return log_error_errno(-1, -err, "Failed to setup ipv4 address for network device with ifindex %d", ifindex); | |
811ef482 CB |
3700 | } |
3701 | ||
3702 | return 0; | |
3703 | } | |
3704 | ||
3705 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) | |
3706 | { | |
3707 | struct lxc_list *iterator; | |
3708 | int err; | |
3709 | ||
3710 | lxc_list_for_each(iterator, ip) { | |
3711 | struct lxc_inet6dev *inet6dev = iterator->elem; | |
3712 | ||
3713 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, | |
3714 | &inet6dev->mcast, &inet6dev->acast, | |
3715 | inet6dev->prefix); | |
9c66dc4f CB |
3716 | if (err) |
3717 | return log_error_errno(-1, -err, "Failed to setup ipv6 address for network device with ifindex %d", ifindex); | |
811ef482 CB |
3718 | } |
3719 | ||
3720 | return 0; | |
3721 | } | |
3722 | ||
8bf64b77 | 3723 | static int lxc_network_setup_in_child_namespaces_common(struct lxc_netdev *netdev) |
811ef482 | 3724 | { |
811ef482 | 3725 | int err; |
009d6127 | 3726 | char bufinet4[INET_ADDRSTRLEN], bufinet6[INET6_ADDRSTRLEN]; |
811ef482 CB |
3727 | |
3728 | /* empty network namespace */ | |
8bf64b77 CB |
3729 | if (!netdev->ifindex && netdev->flags & IFF_UP) { |
3730 | err = lxc_netdev_up("lo"); | |
9c66dc4f CB |
3731 | if (err) |
3732 | return log_error_errno(-1, -err, "Failed to set the loopback network device up"); | |
811ef482 CB |
3733 | } |
3734 | ||
811ef482 | 3735 | /* set a mac address */ |
9c66dc4f CB |
3736 | if (netdev->hwaddr && setup_hw_addr(netdev->hwaddr, netdev->name)) |
3737 | return log_error_errno(-1, errno, "Failed to setup hw address for network device \"%s\"", netdev->name); | |
811ef482 CB |
3738 | |
3739 | /* setup ipv4 addresses on the interface */ | |
9c66dc4f CB |
3740 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) |
3741 | return log_error_errno(-1, errno, "Failed to setup ip addresses for network device \"%s\"", netdev->name); | |
811ef482 CB |
3742 | |
3743 | /* setup ipv6 addresses on the interface */ | |
9c66dc4f CB |
3744 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) |
3745 | return log_error_errno(-1, errno, "Failed to setup ipv6 addresses for network device \"%s\"", netdev->name); | |
811ef482 CB |
3746 | |
3747 | /* set the network device up */ | |
3748 | if (netdev->flags & IFF_UP) { | |
8bf64b77 | 3749 | err = lxc_netdev_up(netdev->name); |
9c66dc4f CB |
3750 | if (err) |
3751 | return log_error_errno(-1, -err, "Failed to set network device \"%s\" up", netdev->name); | |
811ef482 CB |
3752 | |
3753 | /* the network is up, make the loopback up too */ | |
3754 | err = lxc_netdev_up("lo"); | |
9c66dc4f CB |
3755 | if (err) |
3756 | return log_error_errno(-1, -err, "Failed to set the loopback network device up"); | |
811ef482 CB |
3757 | } |
3758 | ||
811ef482 | 3759 | /* setup ipv4 gateway on the interface */ |
a2f9a670 | 3760 | if (netdev->ipv4_gateway || netdev->ipv4_gateway_dev) { |
9c66dc4f CB |
3761 | if (!(netdev->flags & IFF_UP)) |
3762 | return log_error(-1, "Cannot add ipv4 gateway for network device \"%s\" when not bringing up the interface", netdev->name); | |
811ef482 | 3763 | |
9c66dc4f CB |
3764 | if (lxc_list_empty(&netdev->ipv4)) |
3765 | return log_error(-1, "Cannot add ipv4 gateway for network device \"%s\" when not assigning an address", netdev->name); | |
811ef482 | 3766 | |
a2f9a670 | 3767 | /* Setup device route if ipv4_gateway_dev is enabled */ |
3768 | if (netdev->ipv4_gateway_dev) { | |
3769 | err = lxc_ipv4_gateway_add(netdev->ifindex, NULL); | |
9c66dc4f CB |
3770 | if (err < 0) |
3771 | return log_error_errno(-1, -err, "Failed to setup ipv4 gateway to network device \"%s\"", netdev->name); | |
a2f9a670 | 3772 | } else { |
009d6127 | 3773 | /* Check the gateway address is valid */ |
3774 | if (!inet_ntop(AF_INET, netdev->ipv4_gateway, bufinet4, sizeof(bufinet4))) | |
596a002c | 3775 | return ret_set_errno(-1, errno); |
009d6127 | 3776 | |
3777 | /* Try adding a default route to the gateway address */ | |
811ef482 | 3778 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); |
009d6127 | 3779 | if (err < 0) { |
3780 | /* If adding the default route fails, this could be because the | |
3781 | * gateway address is in a different subnet to the container's address. | |
3782 | * To work around this, we try adding a static device route to the | |
3783 | * gateway address first, and then try again. | |
3784 | */ | |
a2f9a670 | 3785 | err = lxc_ipv4_dest_add(netdev->ifindex, netdev->ipv4_gateway, 32); |
9c66dc4f CB |
3786 | if (err < 0) |
3787 | return log_error_errno(-1, -err, "Failed to add ipv4 dest \"%s\" for network device \"%s\"", bufinet4, netdev->name); | |
6d1400b5 | 3788 | |
a2f9a670 | 3789 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); |
9c66dc4f CB |
3790 | if (err < 0) |
3791 | return log_error_errno(-1, -err, "Failed to setup ipv4 gateway \"%s\" for network device \"%s\"", bufinet4, netdev->name); | |
811ef482 CB |
3792 | } |
3793 | } | |
3794 | } | |
3795 | ||
3796 | /* setup ipv6 gateway on the interface */ | |
a2f9a670 | 3797 | if (netdev->ipv6_gateway || netdev->ipv6_gateway_dev) { |
9c66dc4f CB |
3798 | if (!(netdev->flags & IFF_UP)) |
3799 | return log_error(-1, "Cannot add ipv6 gateway for network device \"%s\" when not bringing up the interface", netdev->name); | |
811ef482 | 3800 | |
9c66dc4f CB |
3801 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) |
3802 | return log_error(-1, "Cannot add ipv6 gateway for network device \"%s\" when not assigning an address", netdev->name); | |
811ef482 | 3803 | |
a2f9a670 | 3804 | /* Setup device route if ipv6_gateway_dev is enabled */ |
3805 | if (netdev->ipv6_gateway_dev) { | |
3806 | err = lxc_ipv6_gateway_add(netdev->ifindex, NULL); | |
9c66dc4f CB |
3807 | if (err < 0) |
3808 | return log_error_errno(-1, -err, "Failed to setup ipv6 gateway to network device \"%s\"", netdev->name); | |
a2f9a670 | 3809 | } else { |
009d6127 | 3810 | /* Check the gateway address is valid */ |
3811 | if (!inet_ntop(AF_INET6, netdev->ipv6_gateway, bufinet6, sizeof(bufinet6))) | |
596a002c | 3812 | return ret_set_errno(-1, errno); |
009d6127 | 3813 | |
3814 | /* Try adding a default route to the gateway address */ | |
811ef482 | 3815 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); |
009d6127 | 3816 | if (err < 0) { |
3817 | /* If adding the default route fails, this could be because the | |
3818 | * gateway address is in a different subnet to the container's address. | |
3819 | * To work around this, we try adding a static device route to the | |
3820 | * gateway address first, and then try again. | |
3821 | */ | |
a2f9a670 | 3822 | err = lxc_ipv6_dest_add(netdev->ifindex, netdev->ipv6_gateway, 128); |
9c66dc4f CB |
3823 | if (err < 0) |
3824 | return log_error_errno(-1, errno, "Failed to add ipv6 dest \"%s\" for network device \"%s\"", bufinet6, netdev->name); | |
6d1400b5 | 3825 | |
a2f9a670 | 3826 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); |
9c66dc4f CB |
3827 | if (err < 0) |
3828 | return log_error_errno(-1, -err, "Failed to setup ipv6 gateway \"%s\" for network device \"%s\"", bufinet6, netdev->name); | |
811ef482 CB |
3829 | } |
3830 | } | |
3831 | } | |
3832 | ||
8bf64b77 | 3833 | DEBUG("Network device \"%s\" has been setup", netdev->name); |
811ef482 CB |
3834 | |
3835 | return 0; | |
3836 | } | |
3837 | ||
3838 | int lxc_setup_network_in_child_namespaces(const struct lxc_conf *conf, | |
3839 | struct lxc_list *network) | |
3840 | { | |
3841 | struct lxc_list *iterator; | |
811ef482 | 3842 | |
8bf64b77 | 3843 | lxc_list_for_each (iterator, network) { |
e389f2af | 3844 | struct lxc_netdev *netdev = iterator->elem; |
8bf64b77 | 3845 | int ret; |
811ef482 | 3846 | |
8bf64b77 CB |
3847 | ret = netdev_ns_conf[netdev->type](netdev); |
3848 | if (!ret) | |
3849 | ret = lxc_network_setup_in_child_namespaces_common(netdev); | |
9c66dc4f CB |
3850 | if (ret) |
3851 | return log_error_errno(-1, errno, "Failed to setup netdev"); | |
811ef482 CB |
3852 | } |
3853 | ||
3854 | if (!lxc_list_empty(network)) | |
e389f2af | 3855 | INFO("Network has been setup"); |
811ef482 CB |
3856 | |
3857 | return 0; | |
3858 | } | |
7ab1ba02 | 3859 | |
3c09b97c | 3860 | int lxc_network_send_to_child(struct lxc_handler *handler) |
7ab1ba02 CB |
3861 | { |
3862 | struct lxc_list *iterator; | |
3863 | struct lxc_list *network = &handler->conf->network; | |
3864 | int data_sock = handler->data_sock[0]; | |
3865 | ||
7ab1ba02 CB |
3866 | lxc_list_for_each(iterator, network) { |
3867 | int ret; | |
3868 | struct lxc_netdev *netdev = iterator->elem; | |
3869 | ||
3c09b97c | 3870 | if (!network_requires_advanced_setup(netdev->type)) |
7ab1ba02 CB |
3871 | continue; |
3872 | ||
7fbb15ec | 3873 | ret = lxc_send_nointr(data_sock, netdev->name, IFNAMSIZ, MSG_NOSIGNAL); |
7729f8e5 | 3874 | if (ret < 0) |
7ab1ba02 | 3875 | return -1; |
e389f2af CB |
3876 | |
3877 | ret = lxc_send_nointr(data_sock, netdev->created_name, IFNAMSIZ, MSG_NOSIGNAL); | |
3878 | if (ret < 0) | |
3879 | return -1; | |
3880 | ||
3881 | TRACE("Sent network device name \"%s\" to child", netdev->created_name); | |
7ab1ba02 CB |
3882 | } |
3883 | ||
3884 | return 0; | |
3885 | } | |
3886 | ||
3c09b97c | 3887 | int lxc_network_recv_from_parent(struct lxc_handler *handler) |
7ab1ba02 CB |
3888 | { |
3889 | struct lxc_list *iterator; | |
3890 | struct lxc_list *network = &handler->conf->network; | |
3891 | int data_sock = handler->data_sock[1]; | |
3892 | ||
7ab1ba02 CB |
3893 | lxc_list_for_each(iterator, network) { |
3894 | int ret; | |
3895 | struct lxc_netdev *netdev = iterator->elem; | |
3896 | ||
3c09b97c | 3897 | if (!network_requires_advanced_setup(netdev->type)) |
7ab1ba02 CB |
3898 | continue; |
3899 | ||
e3233f26 | 3900 | ret = lxc_recv_nointr(data_sock, netdev->name, IFNAMSIZ, 0); |
7729f8e5 | 3901 | if (ret < 0) |
7ab1ba02 | 3902 | return -1; |
e389f2af CB |
3903 | |
3904 | ret = lxc_recv_nointr(data_sock, netdev->created_name, IFNAMSIZ, 0); | |
3905 | if (ret < 0) | |
3906 | return -1; | |
54256301 | 3907 | |
e389f2af | 3908 | TRACE("Received network device name \"%s\" from parent", netdev->created_name); |
7ab1ba02 CB |
3909 | } |
3910 | ||
3911 | return 0; | |
3912 | } | |
a1ae535a CB |
3913 | |
3914 | int lxc_network_send_name_and_ifindex_to_parent(struct lxc_handler *handler) | |
3915 | { | |
3916 | struct lxc_list *iterator, *network; | |
3917 | int data_sock = handler->data_sock[0]; | |
3918 | ||
3919 | if (!handler->am_root) | |
3920 | return 0; | |
3921 | ||
3922 | network = &handler->conf->network; | |
3923 | lxc_list_for_each(iterator, network) { | |
3924 | int ret; | |
3925 | struct lxc_netdev *netdev = iterator->elem; | |
3926 | ||
3927 | /* Send network device name in the child's namespace to parent. */ | |
7fbb15ec | 3928 | ret = lxc_send_nointr(data_sock, netdev->name, IFNAMSIZ, MSG_NOSIGNAL); |
a1ae535a | 3929 | if (ret < 0) |
7729f8e5 | 3930 | return -1; |
a1ae535a CB |
3931 | |
3932 | /* Send network device ifindex in the child's namespace to | |
3933 | * parent. | |
3934 | */ | |
7fbb15ec | 3935 | ret = lxc_send_nointr(data_sock, &netdev->ifindex, sizeof(netdev->ifindex), MSG_NOSIGNAL); |
a1ae535a | 3936 | if (ret < 0) |
7729f8e5 | 3937 | return -1; |
a1ae535a CB |
3938 | } |
3939 | ||
e389f2af CB |
3940 | if (!lxc_list_empty(network)) |
3941 | TRACE("Sent network device names and ifindices to parent"); | |
3942 | ||
a1ae535a | 3943 | return 0; |
a1ae535a CB |
3944 | } |
3945 | ||
3946 | int lxc_network_recv_name_and_ifindex_from_child(struct lxc_handler *handler) | |
3947 | { | |
3948 | struct lxc_list *iterator, *network; | |
3949 | int data_sock = handler->data_sock[1]; | |
3950 | ||
3951 | if (!handler->am_root) | |
3952 | return 0; | |
3953 | ||
3954 | network = &handler->conf->network; | |
3955 | lxc_list_for_each(iterator, network) { | |
3956 | int ret; | |
3957 | struct lxc_netdev *netdev = iterator->elem; | |
3958 | ||
3959 | /* Receive network device name in the child's namespace to | |
3960 | * parent. | |
3961 | */ | |
e3233f26 | 3962 | ret = lxc_recv_nointr(data_sock, netdev->name, IFNAMSIZ, 0); |
a1ae535a | 3963 | if (ret < 0) |
7729f8e5 | 3964 | return -1; |
a1ae535a CB |
3965 | |
3966 | /* Receive network device ifindex in the child's namespace to | |
3967 | * parent. | |
3968 | */ | |
e3233f26 | 3969 | ret = lxc_recv_nointr(data_sock, &netdev->ifindex, sizeof(netdev->ifindex), 0); |
a1ae535a | 3970 | if (ret < 0) |
7729f8e5 | 3971 | return -1; |
a1ae535a CB |
3972 | } |
3973 | ||
3974 | return 0; | |
a1ae535a | 3975 | } |
bb84beda CB |
3976 | |
3977 | void lxc_delete_network(struct lxc_handler *handler) | |
3978 | { | |
3979 | bool bret; | |
3980 | ||
3981 | if (handler->am_root) | |
3982 | bret = lxc_delete_network_priv(handler); | |
3983 | else | |
3984 | bret = lxc_delete_network_unpriv(handler); | |
3985 | if (!bret) | |
3986 | DEBUG("Failed to delete network devices"); | |
3987 | else | |
3988 | DEBUG("Deleted network devices"); | |
3989 | } | |
1cd95214 | 3990 | |
1cd95214 CB |
3991 | int lxc_netns_set_nsid(int fd) |
3992 | { | |
41a3300d | 3993 | int ret; |
0ce60f0d CB |
3994 | char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + |
3995 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) + | |
3996 | NLMSG_ALIGN(1024)]; | |
1cd95214 | 3997 | struct nl_handler nlh; |
a5f5cb41 | 3998 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; |
0ce60f0d CB |
3999 | struct nlmsghdr *hdr; |
4000 | struct rtgenmsg *msg; | |
9d036caa CB |
4001 | const __s32 ns_id = -1; |
4002 | const __u32 netns_fd = fd; | |
1cd95214 | 4003 | |
a5f5cb41 | 4004 | ret = netlink_open(nlh_ptr, NETLINK_ROUTE); |
1cd95214 | 4005 | if (ret < 0) |
41a3300d | 4006 | return -1; |
1cd95214 | 4007 | |
0ce60f0d | 4008 | memset(buf, 0, sizeof(buf)); |
6ce39620 CB |
4009 | |
4010 | #pragma GCC diagnostic push | |
4011 | #pragma GCC diagnostic ignored "-Wcast-align" | |
0ce60f0d CB |
4012 | hdr = (struct nlmsghdr *)buf; |
4013 | msg = (struct rtgenmsg *)NLMSG_DATA(hdr); | |
6ce39620 | 4014 | #pragma GCC diagnostic pop |
1cd95214 | 4015 | |
0ce60f0d CB |
4016 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*msg)); |
4017 | hdr->nlmsg_type = RTM_NEWNSID; | |
4018 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
4019 | hdr->nlmsg_pid = 0; | |
4020 | hdr->nlmsg_seq = RTM_NEWNSID; | |
4021 | msg->rtgen_family = AF_UNSPEC; | |
1cd95214 | 4022 | |
9d036caa CB |
4023 | ret = addattr(hdr, 1024, __LXC_NETNSA_FD, &netns_fd, sizeof(netns_fd)); |
4024 | if (ret < 0) | |
a5f5cb41 | 4025 | return ret_errno(ENOMEM); |
9d036caa CB |
4026 | |
4027 | ret = addattr(hdr, 1024, __LXC_NETNSA_NSID, &ns_id, sizeof(ns_id)); | |
4028 | if (ret < 0) | |
a5f5cb41 | 4029 | return ret_errno(ENOMEM); |
1cd95214 | 4030 | |
a5f5cb41 | 4031 | return __netlink_transaction(nlh_ptr, hdr, hdr); |
1cd95214 | 4032 | } |
938980ba CB |
4033 | |
4034 | static int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len) | |
4035 | { | |
4036 | ||
4037 | memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); | |
4038 | ||
4039 | while (RTA_OK(rta, len)) { | |
4040 | unsigned short type = rta->rta_type; | |
4041 | ||
4042 | if ((type <= max) && (!tb[type])) | |
4043 | tb[type] = rta; | |
4044 | ||
6ce39620 CB |
4045 | #pragma GCC diagnostic push |
4046 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba | 4047 | rta = RTA_NEXT(rta, len); |
6ce39620 | 4048 | #pragma GCC diagnostic pop |
938980ba CB |
4049 | } |
4050 | ||
4051 | return 0; | |
4052 | } | |
4053 | ||
4054 | static inline __s32 rta_getattr_s32(const struct rtattr *rta) | |
4055 | { | |
4056 | return *(__s32 *)RTA_DATA(rta); | |
4057 | } | |
4058 | ||
4059 | #ifndef NETNS_RTA | |
4060 | #define NETNS_RTA(r) \ | |
4061 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg)))) | |
4062 | #endif | |
4063 | ||
4064 | int lxc_netns_get_nsid(int fd) | |
4065 | { | |
a5f5cb41 CB |
4066 | struct nl_handler nlh; |
4067 | call_cleaner(netlink_close) struct nl_handler *nlh_ptr = &nlh; | |
938980ba CB |
4068 | int ret; |
4069 | ssize_t len; | |
4070 | char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + | |
9d036caa CB |
4071 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) + |
4072 | NLMSG_ALIGN(1024)]; | |
938980ba | 4073 | struct rtattr *tb[__LXC_NETNSA_MAX + 1]; |
938980ba CB |
4074 | struct nlmsghdr *hdr; |
4075 | struct rtgenmsg *msg; | |
938980ba CB |
4076 | __u32 netns_fd = fd; |
4077 | ||
a5f5cb41 | 4078 | ret = netlink_open(nlh_ptr, NETLINK_ROUTE); |
938980ba CB |
4079 | if (ret < 0) |
4080 | return -1; | |
4081 | ||
4082 | memset(buf, 0, sizeof(buf)); | |
6ce39620 CB |
4083 | |
4084 | #pragma GCC diagnostic push | |
4085 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba CB |
4086 | hdr = (struct nlmsghdr *)buf; |
4087 | msg = (struct rtgenmsg *)NLMSG_DATA(hdr); | |
6ce39620 | 4088 | #pragma GCC diagnostic pop |
938980ba CB |
4089 | |
4090 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*msg)); | |
4091 | hdr->nlmsg_type = RTM_GETNSID; | |
4092 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
4093 | hdr->nlmsg_pid = 0; | |
4094 | hdr->nlmsg_seq = RTM_GETNSID; | |
4095 | msg->rtgen_family = AF_UNSPEC; | |
4096 | ||
9d036caa | 4097 | ret = addattr(hdr, 1024, __LXC_NETNSA_FD, &netns_fd, sizeof(netns_fd)); |
a5f5cb41 CB |
4098 | if (ret < 0) |
4099 | return ret_errno(ENOMEM); | |
938980ba | 4100 | |
a5f5cb41 | 4101 | ret = __netlink_transaction(nlh_ptr, hdr, hdr); |
938980ba CB |
4102 | if (ret < 0) |
4103 | return -1; | |
4104 | ||
4105 | msg = NLMSG_DATA(hdr); | |
4106 | len = hdr->nlmsg_len - NLMSG_SPACE(sizeof(*msg)); | |
4107 | if (len < 0) | |
a5f5cb41 | 4108 | return ret_errno(EINVAL); |
938980ba | 4109 | |
6ce39620 CB |
4110 | #pragma GCC diagnostic push |
4111 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba CB |
4112 | parse_rtattr(tb, __LXC_NETNSA_MAX, NETNS_RTA(msg), len); |
4113 | if (tb[__LXC_NETNSA_NSID]) | |
4114 | return rta_getattr_s32(tb[__LXC_NETNSA_NSID]); | |
6ce39620 | 4115 | #pragma GCC diagnostic pop |
938980ba CB |
4116 | |
4117 | return -1; | |
4118 | } | |
e389f2af CB |
4119 | |
4120 | int lxc_create_network(struct lxc_handler *handler) | |
4121 | { | |
4122 | int ret; | |
4123 | ||
e389f2af CB |
4124 | if (handler->am_root) { |
4125 | ret = lxc_create_network_priv(handler); | |
4126 | if (ret) | |
4127 | return -1; | |
4128 | ||
4129 | return lxc_network_move_created_netdev_priv(handler); | |
4130 | } | |
4131 | ||
4132 | return lxc_create_network_unpriv(handler); | |
4133 | } |