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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
9a2a5625 | 2 | |
6b50cb5c YW |
3 | #include <net/if.h> |
4 | #include <linux/if.h> | |
9a2a5625 | 5 | #include <linux/veth.h> |
fe993888 | 6 | #include <sys/file.h> |
9a2a5625 | 7 | |
f55b0d3f | 8 | #include "sd-device.h" |
9a2a5625 LP |
9 | #include "sd-id128.h" |
10 | #include "sd-netlink.h" | |
9a2a5625 | 11 | |
b5efdb8a | 12 | #include "alloc-util.h" |
9a2a5625 | 13 | #include "ether-addr-util.h" |
130298ba | 14 | #include "hexdecoct.h" |
64e89f56 | 15 | #include "lock-util.h" |
204f52e3 | 16 | #include "missing_network.h" |
bc5ea049 | 17 | #include "netif-naming-scheme.h" |
9a2a5625 | 18 | #include "netlink-util.h" |
cf0fbc49 | 19 | #include "nspawn-network.h" |
a0267b30 | 20 | #include "parse-util.h" |
07630cea | 21 | #include "siphash24.h" |
d308bb99 | 22 | #include "socket-netlink.h" |
ef76dff2 LP |
23 | #include "socket-util.h" |
24 | #include "stat-util.h" | |
07630cea | 25 | #include "string-util.h" |
f55b0d3f | 26 | #include "strv.h" |
26208d5b | 27 | #include "udev-util.h" |
9a2a5625 LP |
28 | |
29 | #define HOST_HASH_KEY SD_ID128_MAKE(1a,37,6f,c7,46,ec,45,0b,ad,a3,d5,31,06,60,5d,b1) | |
30 | #define CONTAINER_HASH_KEY SD_ID128_MAKE(c3,c4,f9,19,b5,57,b2,1c,e6,cf,14,27,03,9c,ee,a2) | |
f6d6bad1 LP |
31 | #define VETH_EXTRA_HOST_HASH_KEY SD_ID128_MAKE(48,c7,f6,b7,ea,9d,4c,9e,b7,28,d4,de,91,d5,bf,66) |
32 | #define VETH_EXTRA_CONTAINER_HASH_KEY SD_ID128_MAKE(af,50,17,61,ce,f9,4d,35,84,0d,2b,20,54,be,ce,59) | |
9a2a5625 | 33 | #define MACVLAN_HASH_KEY SD_ID128_MAKE(00,13,6d,bc,66,83,44,81,bb,0c,f9,51,1f,24,a6,6f) |
bc5ea049 | 34 | #define SHORTEN_IFNAME_HASH_KEY SD_ID128_MAKE(e1,90,a4,04,a8,ef,4b,51,8c,cc,c3,3a,9f,11,fc,a2) |
9a2a5625 | 35 | |
22b28dfd LP |
36 | static int remove_one_link(sd_netlink *rtnl, const char *name) { |
37 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; | |
38 | int r; | |
39 | ||
40 | if (isempty(name)) | |
41 | return 0; | |
42 | ||
43 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_DELLINK, 0); | |
44 | if (r < 0) | |
45 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
46 | ||
47 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, name); | |
48 | if (r < 0) | |
49 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
50 | ||
51 | r = sd_netlink_call(rtnl, m, 0, NULL); | |
52 | if (r == -ENODEV) /* Already gone */ | |
53 | return 0; | |
54 | if (r < 0) | |
55 | return log_error_errno(r, "Failed to remove interface %s: %m", name); | |
56 | ||
57 | return 1; | |
58 | } | |
59 | ||
9a2a5625 LP |
60 | static int generate_mac( |
61 | const char *machine_name, | |
62 | struct ether_addr *mac, | |
63 | sd_id128_t hash_key, | |
64 | uint64_t idx) { | |
65 | ||
dbe81cbd | 66 | uint64_t result; |
9a2a5625 LP |
67 | size_t l, sz; |
68 | uint8_t *v, *i; | |
69 | int r; | |
70 | ||
71 | l = strlen(machine_name); | |
72 | sz = sizeof(sd_id128_t) + l; | |
73 | if (idx > 0) | |
74 | sz += sizeof(idx); | |
75 | ||
6e9417f5 | 76 | v = newa(uint8_t, sz); |
9a2a5625 LP |
77 | |
78 | /* fetch some persistent data unique to the host */ | |
79 | r = sd_id128_get_machine((sd_id128_t*) v); | |
80 | if (r < 0) | |
81 | return r; | |
82 | ||
83 | /* combine with some data unique (on this host) to this | |
84 | * container instance */ | |
85 | i = mempcpy(v + sizeof(sd_id128_t), machine_name, l); | |
86 | if (idx > 0) { | |
87 | idx = htole64(idx); | |
88 | memcpy(i, &idx, sizeof(idx)); | |
89 | } | |
90 | ||
91 | /* Let's hash the host machine ID plus the container name. We | |
92 | * use a fixed, but originally randomly created hash key here. */ | |
933f9cae | 93 | result = htole64(siphash24(v, sz, hash_key.bytes)); |
9a2a5625 LP |
94 | |
95 | assert_cc(ETH_ALEN <= sizeof(result)); | |
dbe81cbd | 96 | memcpy(mac->ether_addr_octet, &result, ETH_ALEN); |
9a2a5625 | 97 | |
e22ca700 | 98 | ether_addr_mark_random(mac); |
9a2a5625 LP |
99 | |
100 | return 0; | |
101 | } | |
102 | ||
6b50cb5c YW |
103 | static int set_alternative_ifname(sd_netlink *rtnl, const char *ifname, const char *altifname) { |
104 | int r; | |
105 | ||
106 | assert(rtnl); | |
107 | assert(ifname); | |
108 | ||
109 | if (!altifname) | |
110 | return 0; | |
111 | ||
112 | if (strlen(altifname) >= ALTIFNAMSIZ) | |
113 | return log_warning_errno(SYNTHETIC_ERRNO(ERANGE), | |
114 | "Alternative interface name '%s' for '%s' is too long, ignoring", | |
115 | altifname, ifname); | |
116 | ||
117 | r = rtnl_set_link_alternative_names_by_ifname(&rtnl, ifname, STRV_MAKE(altifname)); | |
118 | if (r < 0) | |
119 | return log_warning_errno(r, | |
120 | "Failed to set alternative interface name '%s' to '%s', ignoring: %m", | |
121 | altifname, ifname); | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
f6d6bad1 LP |
126 | static int add_veth( |
127 | sd_netlink *rtnl, | |
128 | pid_t pid, | |
129 | const char *ifname_host, | |
6b50cb5c | 130 | const char *altifname_host, |
f6d6bad1 LP |
131 | const struct ether_addr *mac_host, |
132 | const char *ifname_container, | |
133 | const struct ether_addr *mac_container) { | |
9a2a5625 | 134 | |
4afd3348 | 135 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
f6d6bad1 | 136 | int r; |
9a2a5625 | 137 | |
f6d6bad1 LP |
138 | assert(rtnl); |
139 | assert(ifname_host); | |
140 | assert(mac_host); | |
141 | assert(ifname_container); | |
142 | assert(mac_container); | |
9a2a5625 LP |
143 | |
144 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0); | |
145 | if (r < 0) | |
146 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
147 | ||
f6d6bad1 | 148 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, ifname_host); |
9a2a5625 LP |
149 | if (r < 0) |
150 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
151 | ||
f6d6bad1 | 152 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, mac_host); |
9a2a5625 LP |
153 | if (r < 0) |
154 | return log_error_errno(r, "Failed to add netlink MAC address: %m"); | |
155 | ||
156 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); | |
157 | if (r < 0) | |
158 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
159 | ||
160 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "veth"); | |
161 | if (r < 0) | |
162 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
163 | ||
164 | r = sd_netlink_message_open_container(m, VETH_INFO_PEER); | |
165 | if (r < 0) | |
166 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
167 | ||
f6d6bad1 | 168 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, ifname_container); |
9a2a5625 LP |
169 | if (r < 0) |
170 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
171 | ||
f6d6bad1 | 172 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, mac_container); |
9a2a5625 LP |
173 | if (r < 0) |
174 | return log_error_errno(r, "Failed to add netlink MAC address: %m"); | |
175 | ||
176 | r = sd_netlink_message_append_u32(m, IFLA_NET_NS_PID, pid); | |
177 | if (r < 0) | |
178 | return log_error_errno(r, "Failed to add netlink namespace field: %m"); | |
179 | ||
180 | r = sd_netlink_message_close_container(m); | |
181 | if (r < 0) | |
182 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
183 | ||
184 | r = sd_netlink_message_close_container(m); | |
185 | if (r < 0) | |
186 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
187 | ||
188 | r = sd_netlink_message_close_container(m); | |
189 | if (r < 0) | |
190 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
191 | ||
192 | r = sd_netlink_call(rtnl, m, 0, NULL); | |
193 | if (r < 0) | |
f6d6bad1 LP |
194 | return log_error_errno(r, "Failed to add new veth interfaces (%s:%s): %m", ifname_host, ifname_container); |
195 | ||
6b50cb5c YW |
196 | (void) set_alternative_ifname(rtnl, ifname_host, altifname_host); |
197 | ||
f6d6bad1 LP |
198 | return 0; |
199 | } | |
200 | ||
6b50cb5c | 201 | static int shorten_ifname(char *ifname) { |
bc5ea049 KK |
202 | char new_ifname[IFNAMSIZ]; |
203 | ||
204 | assert(ifname); | |
205 | ||
206 | if (strlen(ifname) < IFNAMSIZ) /* Name is short enough */ | |
6b50cb5c | 207 | return 0; |
bc5ea049 KK |
208 | |
209 | if (naming_scheme_has(NAMING_NSPAWN_LONG_HASH)) { | |
210 | uint64_t h; | |
211 | ||
da890466 | 212 | /* Calculate 64-bit hash value */ |
bc5ea049 KK |
213 | h = siphash24(ifname, strlen(ifname), SHORTEN_IFNAME_HASH_KEY.bytes); |
214 | ||
da890466 | 215 | /* Set the final four bytes (i.e. 32-bit) to the lower 24bit of the hash, encoded in url-safe base64 */ |
bc5ea049 KK |
216 | memcpy(new_ifname, ifname, IFNAMSIZ - 5); |
217 | new_ifname[IFNAMSIZ - 5] = urlsafe_base64char(h >> 18); | |
218 | new_ifname[IFNAMSIZ - 4] = urlsafe_base64char(h >> 12); | |
219 | new_ifname[IFNAMSIZ - 3] = urlsafe_base64char(h >> 6); | |
220 | new_ifname[IFNAMSIZ - 2] = urlsafe_base64char(h); | |
221 | } else | |
222 | /* On old nspawn versions we just truncated the name, provide compatibility */ | |
223 | memcpy(new_ifname, ifname, IFNAMSIZ-1); | |
224 | ||
225 | new_ifname[IFNAMSIZ - 1] = 0; | |
226 | ||
227 | /* Log the incident to make it more discoverable */ | |
228 | log_warning("Network interface name '%s' has been changed to '%s' to fit length constraints.", ifname, new_ifname); | |
229 | ||
230 | strcpy(ifname, new_ifname); | |
6b50cb5c | 231 | return 1; |
bc5ea049 KK |
232 | } |
233 | ||
f6d6bad1 LP |
234 | int setup_veth(const char *machine_name, |
235 | pid_t pid, | |
236 | char iface_name[IFNAMSIZ], | |
813dbff4 | 237 | bool bridge, |
5e21da87 | 238 | const struct ether_addr *provided_mac) { |
f6d6bad1 | 239 | |
4afd3348 | 240 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; |
f6d6bad1 | 241 | struct ether_addr mac_host, mac_container; |
bc5ea049 | 242 | unsigned u; |
6b50cb5c | 243 | char *n, *a = NULL; |
bc5ea049 | 244 | int r; |
f6d6bad1 LP |
245 | |
246 | assert(machine_name); | |
247 | assert(pid > 0); | |
248 | assert(iface_name); | |
249 | ||
250 | /* Use two different interface name prefixes depending whether | |
251 | * we are in bridge mode or not. */ | |
bc5ea049 | 252 | n = strjoina(bridge ? "vb-" : "ve-", machine_name); |
6b50cb5c YW |
253 | r = shorten_ifname(n); |
254 | if (r > 0) | |
255 | a = strjoina(bridge ? "vb-" : "ve-", machine_name); | |
f6d6bad1 | 256 | |
813dbff4 RC |
257 | if (ether_addr_is_null(provided_mac)){ |
258 | r = generate_mac(machine_name, &mac_container, CONTAINER_HASH_KEY, 0); | |
259 | if (r < 0) | |
260 | return log_error_errno(r, "Failed to generate predictable MAC address for container side: %m"); | |
261 | } else | |
262 | mac_container = *provided_mac; | |
f6d6bad1 LP |
263 | |
264 | r = generate_mac(machine_name, &mac_host, HOST_HASH_KEY, 0); | |
265 | if (r < 0) | |
266 | return log_error_errno(r, "Failed to generate predictable MAC address for host side: %m"); | |
267 | ||
268 | r = sd_netlink_open(&rtnl); | |
269 | if (r < 0) | |
270 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
271 | ||
6b50cb5c | 272 | r = add_veth(rtnl, pid, n, a, &mac_host, "host0", &mac_container); |
f6d6bad1 LP |
273 | if (r < 0) |
274 | return r; | |
9a2a5625 | 275 | |
f6e49154 | 276 | u = if_nametoindex(n); /* We don't need to use rtnl_resolve_ifname() here because the |
d308bb99 | 277 | * name we assigned is always the main name. */ |
bc5ea049 KK |
278 | if (u == 0) |
279 | return log_error_errno(errno, "Failed to resolve interface %s: %m", n); | |
9a2a5625 | 280 | |
bc5ea049 KK |
281 | strcpy(iface_name, n); |
282 | return (int) u; | |
9a2a5625 LP |
283 | } |
284 | ||
f6d6bad1 LP |
285 | int setup_veth_extra( |
286 | const char *machine_name, | |
287 | pid_t pid, | |
288 | char **pairs) { | |
289 | ||
4afd3348 | 290 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; |
f6d6bad1 | 291 | uint64_t idx = 0; |
f6d6bad1 LP |
292 | int r; |
293 | ||
294 | assert(machine_name); | |
295 | assert(pid > 0); | |
296 | ||
297 | if (strv_isempty(pairs)) | |
298 | return 0; | |
299 | ||
300 | r = sd_netlink_open(&rtnl); | |
301 | if (r < 0) | |
302 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
303 | ||
304 | STRV_FOREACH_PAIR(a, b, pairs) { | |
305 | struct ether_addr mac_host, mac_container; | |
306 | ||
307 | r = generate_mac(machine_name, &mac_container, VETH_EXTRA_CONTAINER_HASH_KEY, idx); | |
308 | if (r < 0) | |
309 | return log_error_errno(r, "Failed to generate predictable MAC address for container side of extra veth link: %m"); | |
310 | ||
311 | r = generate_mac(machine_name, &mac_host, VETH_EXTRA_HOST_HASH_KEY, idx); | |
312 | if (r < 0) | |
bcc0fe63 | 313 | return log_error_errno(r, "Failed to generate predictable MAC address for host side of extra veth link: %m"); |
f6d6bad1 | 314 | |
6b50cb5c | 315 | r = add_veth(rtnl, pid, *a, NULL, &mac_host, *b, &mac_container); |
f6d6bad1 LP |
316 | if (r < 0) |
317 | return r; | |
318 | ||
313cefa1 | 319 | idx++; |
f6d6bad1 LP |
320 | } |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
22b28dfd | 325 | static int join_bridge(sd_netlink *rtnl, const char *veth_name, const char *bridge_name) { |
4afd3348 | 326 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
9a2a5625 LP |
327 | int r, bridge_ifi; |
328 | ||
22b28dfd | 329 | assert(rtnl); |
9a2a5625 LP |
330 | assert(veth_name); |
331 | assert(bridge_name); | |
332 | ||
f6e49154 | 333 | bridge_ifi = rtnl_resolve_interface(&rtnl, bridge_name); |
597da51b ZJS |
334 | if (bridge_ifi < 0) |
335 | return bridge_ifi; | |
9a2a5625 LP |
336 | |
337 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_SETLINK, 0); | |
338 | if (r < 0) | |
22b28dfd | 339 | return r; |
9a2a5625 LP |
340 | |
341 | r = sd_rtnl_message_link_set_flags(m, IFF_UP, IFF_UP); | |
342 | if (r < 0) | |
22b28dfd | 343 | return r; |
9a2a5625 LP |
344 | |
345 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, veth_name); | |
346 | if (r < 0) | |
22b28dfd | 347 | return r; |
9a2a5625 LP |
348 | |
349 | r = sd_netlink_message_append_u32(m, IFLA_MASTER, bridge_ifi); | |
350 | if (r < 0) | |
22b28dfd | 351 | return r; |
9a2a5625 LP |
352 | |
353 | r = sd_netlink_call(rtnl, m, 0, NULL); | |
354 | if (r < 0) | |
22b28dfd | 355 | return r; |
9a2a5625 LP |
356 | |
357 | return bridge_ifi; | |
358 | } | |
359 | ||
22b28dfd LP |
360 | static int create_bridge(sd_netlink *rtnl, const char *bridge_name) { |
361 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; | |
362 | int r; | |
363 | ||
364 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0); | |
365 | if (r < 0) | |
366 | return r; | |
367 | ||
368 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, bridge_name); | |
369 | if (r < 0) | |
370 | return r; | |
371 | ||
372 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); | |
373 | if (r < 0) | |
374 | return r; | |
375 | ||
376 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "bridge"); | |
377 | if (r < 0) | |
378 | return r; | |
379 | ||
380 | r = sd_netlink_message_close_container(m); | |
381 | if (r < 0) | |
382 | return r; | |
383 | ||
384 | r = sd_netlink_message_close_container(m); | |
385 | if (r < 0) | |
386 | return r; | |
387 | ||
388 | r = sd_netlink_call(rtnl, m, 0, NULL); | |
389 | if (r < 0) | |
390 | return r; | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | int setup_bridge(const char *veth_name, const char *bridge_name, bool create) { | |
8e766630 | 396 | _cleanup_(release_lock_file) LockFile bridge_lock = LOCK_FILE_INIT; |
22b28dfd LP |
397 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; |
398 | int r, bridge_ifi; | |
399 | unsigned n = 0; | |
400 | ||
401 | assert(veth_name); | |
402 | assert(bridge_name); | |
403 | ||
404 | r = sd_netlink_open(&rtnl); | |
405 | if (r < 0) | |
406 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
407 | ||
408 | if (create) { | |
409 | /* We take a system-wide lock here, so that we can safely check whether there's still a member in the | |
6dd6a9c4 | 410 | * bridge before removing it, without risking interference from other nspawn instances. */ |
22b28dfd LP |
411 | |
412 | r = make_lock_file("/run/systemd/nspawn-network-zone", LOCK_EX, &bridge_lock); | |
413 | if (r < 0) | |
414 | return log_error_errno(r, "Failed to take network zone lock: %m"); | |
415 | } | |
416 | ||
417 | for (;;) { | |
418 | bridge_ifi = join_bridge(rtnl, veth_name, bridge_name); | |
419 | if (bridge_ifi >= 0) | |
420 | return bridge_ifi; | |
421 | if (bridge_ifi != -ENODEV || !create || n > 10) | |
422 | return log_error_errno(bridge_ifi, "Failed to add interface %s to bridge %s: %m", veth_name, bridge_name); | |
423 | ||
424 | /* Count attempts, so that we don't enter an endless loop here. */ | |
425 | n++; | |
426 | ||
427 | /* The bridge doesn't exist yet. Let's create it */ | |
428 | r = create_bridge(rtnl, bridge_name); | |
429 | if (r < 0) | |
430 | return log_error_errno(r, "Failed to create bridge interface %s: %m", bridge_name); | |
431 | ||
432 | /* Try again, now that the bridge exists */ | |
433 | } | |
434 | } | |
435 | ||
436 | int remove_bridge(const char *bridge_name) { | |
8e766630 | 437 | _cleanup_(release_lock_file) LockFile bridge_lock = LOCK_FILE_INIT; |
22b28dfd LP |
438 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; |
439 | const char *path; | |
440 | int r; | |
441 | ||
442 | /* Removes the specified bridge, but only if it is currently empty */ | |
443 | ||
444 | if (isempty(bridge_name)) | |
445 | return 0; | |
446 | ||
447 | r = make_lock_file("/run/systemd/nspawn-network-zone", LOCK_EX, &bridge_lock); | |
448 | if (r < 0) | |
449 | return log_error_errno(r, "Failed to take network zone lock: %m"); | |
450 | ||
451 | path = strjoina("/sys/class/net/", bridge_name, "/brif"); | |
452 | ||
db55bbf2 | 453 | r = dir_is_empty(path, /* ignore_hidden_or_backup= */ false); |
22b28dfd LP |
454 | if (r == -ENOENT) /* Already gone? */ |
455 | return 0; | |
456 | if (r < 0) | |
457 | return log_error_errno(r, "Can't detect if bridge %s is empty: %m", bridge_name); | |
458 | if (r == 0) /* Still populated, leave it around */ | |
459 | return 0; | |
460 | ||
461 | r = sd_netlink_open(&rtnl); | |
462 | if (r < 0) | |
463 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
464 | ||
465 | return remove_one_link(rtnl, bridge_name); | |
466 | } | |
467 | ||
2f091b1b | 468 | static int test_network_interface_initialized(const char *name) { |
b390f178 | 469 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; |
0ac655a6 | 470 | int r; |
26208d5b | 471 | |
c76b8751 | 472 | if (!udev_available()) |
b390f178 | 473 | return 0; |
26208d5b | 474 | |
b390f178 | 475 | /* udev should be around. */ |
26208d5b | 476 | |
0ac655a6 | 477 | r = sd_device_new_from_ifname(&d, name); |
b390f178 DDM |
478 | if (r < 0) |
479 | return log_error_errno(r, "Failed to get device %s: %m", name); | |
480 | ||
481 | r = sd_device_get_is_initialized(d); | |
482 | if (r < 0) | |
483 | return log_error_errno(r, "Failed to determine whether interface %s is initialized: %m", name); | |
484 | if (r == 0) | |
485 | return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Network interface %s is not initialized yet.", name); | |
486 | ||
487 | r = device_is_renaming(d); | |
488 | if (r < 0) | |
489 | return log_error_errno(r, "Failed to determine the interface %s is being renamed: %m", name); | |
490 | if (r > 0) | |
491 | return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Interface %s is being renamed.", name); | |
492 | ||
493 | return 0; | |
9a2a5625 LP |
494 | } |
495 | ||
2f091b1b TM |
496 | int test_network_interfaces_initialized(char **iface_pairs) { |
497 | int r; | |
498 | STRV_FOREACH_PAIR(a, b, iface_pairs) { | |
499 | r = test_network_interface_initialized(*a); | |
500 | if (r < 0) | |
501 | return r; | |
502 | } | |
503 | return 0; | |
504 | } | |
505 | ||
506 | int move_network_interfaces(int netns_fd, char **iface_pairs) { | |
4afd3348 | 507 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; |
9a2a5625 LP |
508 | int r; |
509 | ||
2f091b1b | 510 | if (strv_isempty(iface_pairs)) |
9a2a5625 LP |
511 | return 0; |
512 | ||
513 | r = sd_netlink_open(&rtnl); | |
514 | if (r < 0) | |
515 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
516 | ||
2f091b1b | 517 | STRV_FOREACH_PAIR(i, b, iface_pairs) { |
4afd3348 | 518 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
9a2a5625 LP |
519 | int ifi; |
520 | ||
f6e49154 | 521 | ifi = rtnl_resolve_interface_or_warn(&rtnl, *i); |
9a2a5625 LP |
522 | if (ifi < 0) |
523 | return ifi; | |
524 | ||
525 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_SETLINK, ifi); | |
526 | if (r < 0) | |
527 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
528 | ||
5b4855ab | 529 | r = sd_netlink_message_append_u32(m, IFLA_NET_NS_FD, netns_fd); |
9a2a5625 | 530 | if (r < 0) |
5b4855ab | 531 | return log_error_errno(r, "Failed to append namespace fd to netlink message: %m"); |
9a2a5625 | 532 | |
2f091b1b TM |
533 | if (!streq(*b, *i)) { |
534 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, *b); | |
535 | if (r < 0) | |
536 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
537 | } | |
538 | ||
9a2a5625 LP |
539 | r = sd_netlink_call(rtnl, m, 0, NULL); |
540 | if (r < 0) | |
541 | return log_error_errno(r, "Failed to move interface %s to namespace: %m", *i); | |
542 | } | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
2f091b1b | 547 | int setup_macvlan(const char *machine_name, pid_t pid, char **iface_pairs) { |
4afd3348 | 548 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; |
9a2a5625 | 549 | unsigned idx = 0; |
9a2a5625 LP |
550 | int r; |
551 | ||
2f091b1b | 552 | if (strv_isempty(iface_pairs)) |
9a2a5625 LP |
553 | return 0; |
554 | ||
555 | r = sd_netlink_open(&rtnl); | |
556 | if (r < 0) | |
557 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
558 | ||
2f091b1b | 559 | STRV_FOREACH_PAIR(i, b, iface_pairs) { |
4afd3348 | 560 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
2f091b1b TM |
561 | _cleanup_free_ char *n = NULL; |
562 | int shortened, ifi; | |
9a2a5625 | 563 | struct ether_addr mac; |
9a2a5625 | 564 | |
f6e49154 | 565 | ifi = rtnl_resolve_interface_or_warn(&rtnl, *i); |
9a2a5625 LP |
566 | if (ifi < 0) |
567 | return ifi; | |
568 | ||
569 | r = generate_mac(machine_name, &mac, MACVLAN_HASH_KEY, idx++); | |
570 | if (r < 0) | |
571 | return log_error_errno(r, "Failed to create MACVLAN MAC address: %m"); | |
572 | ||
573 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0); | |
574 | if (r < 0) | |
575 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
576 | ||
577 | r = sd_netlink_message_append_u32(m, IFLA_LINK, ifi); | |
578 | if (r < 0) | |
579 | return log_error_errno(r, "Failed to add netlink interface index: %m"); | |
580 | ||
2f091b1b | 581 | n = strdup(*b); |
9a2a5625 LP |
582 | if (!n) |
583 | return log_oom(); | |
584 | ||
2f091b1b | 585 | shortened = shorten_ifname(n); |
9a2a5625 LP |
586 | |
587 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, n); | |
588 | if (r < 0) | |
589 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
590 | ||
591 | r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, &mac); | |
592 | if (r < 0) | |
593 | return log_error_errno(r, "Failed to add netlink MAC address: %m"); | |
594 | ||
595 | r = sd_netlink_message_append_u32(m, IFLA_NET_NS_PID, pid); | |
596 | if (r < 0) | |
597 | return log_error_errno(r, "Failed to add netlink namespace field: %m"); | |
598 | ||
599 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); | |
600 | if (r < 0) | |
601 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
602 | ||
603 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "macvlan"); | |
604 | if (r < 0) | |
605 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
606 | ||
607 | r = sd_netlink_message_append_u32(m, IFLA_MACVLAN_MODE, MACVLAN_MODE_BRIDGE); | |
608 | if (r < 0) | |
609 | return log_error_errno(r, "Failed to append macvlan mode: %m"); | |
610 | ||
611 | r = sd_netlink_message_close_container(m); | |
612 | if (r < 0) | |
613 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
614 | ||
615 | r = sd_netlink_message_close_container(m); | |
616 | if (r < 0) | |
617 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
618 | ||
619 | r = sd_netlink_call(rtnl, m, 0, NULL); | |
620 | if (r < 0) | |
621 | return log_error_errno(r, "Failed to add new macvlan interfaces: %m"); | |
6b50cb5c | 622 | |
2f091b1b TM |
623 | if (shortened > 0) |
624 | (void) set_alternative_ifname(rtnl, n, *b); | |
9a2a5625 LP |
625 | } |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
2f091b1b | 630 | int setup_ipvlan(const char *machine_name, pid_t pid, char **iface_pairs) { |
4afd3348 | 631 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; |
9a2a5625 LP |
632 | int r; |
633 | ||
2f091b1b | 634 | if (strv_isempty(iface_pairs)) |
9a2a5625 LP |
635 | return 0; |
636 | ||
637 | r = sd_netlink_open(&rtnl); | |
638 | if (r < 0) | |
639 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
640 | ||
2f091b1b | 641 | STRV_FOREACH_PAIR(i, b, iface_pairs) { |
4afd3348 | 642 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
2f091b1b TM |
643 | _cleanup_free_ char *n = NULL; |
644 | int shortened, ifi ; | |
9a2a5625 | 645 | |
f6e49154 | 646 | ifi = rtnl_resolve_interface_or_warn(&rtnl, *i); |
9a2a5625 LP |
647 | if (ifi < 0) |
648 | return ifi; | |
649 | ||
650 | r = sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0); | |
651 | if (r < 0) | |
652 | return log_error_errno(r, "Failed to allocate netlink message: %m"); | |
653 | ||
654 | r = sd_netlink_message_append_u32(m, IFLA_LINK, ifi); | |
655 | if (r < 0) | |
656 | return log_error_errno(r, "Failed to add netlink interface index: %m"); | |
657 | ||
2f091b1b | 658 | n = strdup(*b); |
9a2a5625 LP |
659 | if (!n) |
660 | return log_oom(); | |
661 | ||
2f091b1b | 662 | shortened = shorten_ifname(n); |
9a2a5625 LP |
663 | |
664 | r = sd_netlink_message_append_string(m, IFLA_IFNAME, n); | |
665 | if (r < 0) | |
666 | return log_error_errno(r, "Failed to add netlink interface name: %m"); | |
667 | ||
668 | r = sd_netlink_message_append_u32(m, IFLA_NET_NS_PID, pid); | |
669 | if (r < 0) | |
670 | return log_error_errno(r, "Failed to add netlink namespace field: %m"); | |
671 | ||
672 | r = sd_netlink_message_open_container(m, IFLA_LINKINFO); | |
673 | if (r < 0) | |
674 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
675 | ||
676 | r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "ipvlan"); | |
677 | if (r < 0) | |
678 | return log_error_errno(r, "Failed to open netlink container: %m"); | |
679 | ||
680 | r = sd_netlink_message_append_u16(m, IFLA_IPVLAN_MODE, IPVLAN_MODE_L2); | |
681 | if (r < 0) | |
682 | return log_error_errno(r, "Failed to add ipvlan mode: %m"); | |
683 | ||
684 | r = sd_netlink_message_close_container(m); | |
685 | if (r < 0) | |
686 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
687 | ||
688 | r = sd_netlink_message_close_container(m); | |
689 | if (r < 0) | |
690 | return log_error_errno(r, "Failed to close netlink container: %m"); | |
691 | ||
692 | r = sd_netlink_call(rtnl, m, 0, NULL); | |
693 | if (r < 0) | |
694 | return log_error_errno(r, "Failed to add new ipvlan interfaces: %m"); | |
6b50cb5c | 695 | |
2f091b1b TM |
696 | if (shortened > 0) |
697 | (void) set_alternative_ifname(rtnl, n, *b); | |
9a2a5625 LP |
698 | } |
699 | ||
700 | return 0; | |
701 | } | |
f6d6bad1 LP |
702 | |
703 | int veth_extra_parse(char ***l, const char *p) { | |
704 | _cleanup_free_ char *a = NULL, *b = NULL; | |
705 | int r; | |
706 | ||
707 | r = extract_first_word(&p, &a, ":", EXTRACT_DONT_COALESCE_SEPARATORS); | |
708 | if (r < 0) | |
709 | return r; | |
ef76dff2 | 710 | if (r == 0 || !ifname_valid(a)) |
f6d6bad1 LP |
711 | return -EINVAL; |
712 | ||
713 | r = extract_first_word(&p, &b, ":", EXTRACT_DONT_COALESCE_SEPARATORS); | |
714 | if (r < 0) | |
715 | return r; | |
ef76dff2 | 716 | if (r == 0 || !ifname_valid(b)) { |
a73e5eb9 DT |
717 | r = free_and_strdup(&b, a); |
718 | if (r < 0) | |
719 | return r; | |
f6d6bad1 LP |
720 | } |
721 | ||
722 | if (p) | |
723 | return -EINVAL; | |
724 | ||
725 | r = strv_push_pair(l, a, b); | |
726 | if (r < 0) | |
727 | return -ENOMEM; | |
728 | ||
729 | a = b = NULL; | |
730 | return 0; | |
731 | } | |
ef3b2aa7 | 732 | |
ef3b2aa7 LP |
733 | int remove_veth_links(const char *primary, char **pairs) { |
734 | _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; | |
ef3b2aa7 LP |
735 | int r; |
736 | ||
737 | /* In some cases the kernel might pin the veth links between host and container even after the namespace | |
738 | * died. Hence, let's better remove them explicitly too. */ | |
739 | ||
740 | if (isempty(primary) && strv_isempty(pairs)) | |
741 | return 0; | |
742 | ||
743 | r = sd_netlink_open(&rtnl); | |
744 | if (r < 0) | |
745 | return log_error_errno(r, "Failed to connect to netlink: %m"); | |
746 | ||
22b28dfd | 747 | remove_one_link(rtnl, primary); |
ef3b2aa7 LP |
748 | |
749 | STRV_FOREACH_PAIR(a, b, pairs) | |
22b28dfd | 750 | remove_one_link(rtnl, *a); |
ef3b2aa7 LP |
751 | |
752 | return 0; | |
753 | } | |
2f091b1b TM |
754 | |
755 | static int network_iface_pair_parse(const char* iftype, char ***l, const char *p, const char* ifprefix) { | |
2f091b1b TM |
756 | int r; |
757 | ||
8f4d843a FS |
758 | for (;;) { |
759 | _cleanup_free_ char *word = NULL, *a = NULL, *b = NULL; | |
760 | const char *interface; | |
2f091b1b | 761 | |
8f4d843a FS |
762 | r = extract_first_word(&p, &word, NULL, 0); |
763 | if (r < 0) | |
764 | return log_error_errno(r, "Failed to parse interface name: %m"); | |
765 | if (r == 0) | |
766 | break; | |
2f091b1b | 767 | |
8f4d843a FS |
768 | interface = word; |
769 | r = extract_first_word(&interface, &a, ":", EXTRACT_DONT_COALESCE_SEPARATORS); | |
770 | if (r < 0) | |
771 | return log_error_errno(r, "Failed to extract first word in %s parameter: %m", iftype); | |
772 | if (r == 0) | |
773 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
774 | "Short read while reading %s parameter: %m", iftype); | |
775 | if (!ifname_valid(a)) | |
776 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
777 | "%s, interface name not valid: %s", iftype, a); | |
778 | ||
927e20fa YW |
779 | /* Here, we only check the validity of the specified second name. If it is not specified, |
780 | * the copied or prefixed name should be already valid, except for its length. If it is too | |
781 | * long, then it will be shortened later. */ | |
782 | if (!isempty(interface)) { | |
783 | if (!ifname_valid(interface)) | |
784 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
785 | "%s, interface name not valid: %s", iftype, interface); | |
786 | ||
8f4d843a | 787 | b = strdup(interface); |
927e20fa YW |
788 | } else if (ifprefix) |
789 | b = strjoin(ifprefix, a); | |
790 | else | |
791 | b = strdup(a); | |
8f4d843a FS |
792 | if (!b) |
793 | return log_oom(); | |
794 | ||
8f4d843a FS |
795 | r = strv_consume_pair(l, TAKE_PTR(a), TAKE_PTR(b)); |
796 | if (r < 0) | |
797 | return log_oom(); | |
798 | } | |
2f091b1b | 799 | |
2f091b1b TM |
800 | return 0; |
801 | } | |
802 | ||
803 | int interface_pair_parse(char ***l, const char *p) { | |
804 | return network_iface_pair_parse("Network interface", l, p, NULL); | |
805 | } | |
806 | ||
807 | int macvlan_pair_parse(char ***l, const char *p) { | |
808 | return network_iface_pair_parse("MACVLAN network interface", l, p, "mv-"); | |
809 | } | |
810 | ||
811 | int ipvlan_pair_parse(char ***l, const char *p) { | |
812 | return network_iface_pair_parse("IPVLAN network interface", l, p, "iv-"); | |
813 | } |