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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
af6f0d42 | 2 | |
01234e1f | 3 | #include <linux/netdevice.h> |
43b3a5ef | 4 | #include <netinet/ether.h> |
a0b191b7 | 5 | #include <unistd.h> |
43b3a5ef | 6 | |
e5eadf53 | 7 | #include "sd-device.h" |
07630cea | 8 | #include "sd-netlink.h" |
af6f0d42 | 9 | |
b5efdb8a | 10 | #include "alloc-util.h" |
07630cea LP |
11 | #include "conf-files.h" |
12 | #include "conf-parser.h" | |
dc0d4078 | 13 | #include "def.h" |
e0e789c1 | 14 | #include "device-private.h" |
b220632c | 15 | #include "device-util.h" |
a5010333 | 16 | #include "ethtool-util.h" |
3ffd4af2 | 17 | #include "fd-util.h" |
07630cea | 18 | #include "link-config.h" |
af6f0d42 | 19 | #include "log.h" |
0a970718 | 20 | #include "memory-util.h" |
7e19cc54 | 21 | #include "net-condition.h" |
b355d0c9 | 22 | #include "netif-naming-scheme.h" |
1c4baffc | 23 | #include "netlink-util.h" |
dc7f6c9b | 24 | #include "network-util.h" |
6bedfcbb | 25 | #include "parse-util.h" |
b0c82192 | 26 | #include "path-lookup.h" |
07630cea | 27 | #include "path-util.h" |
4e731273 | 28 | #include "proc-cmdline.h" |
3df3e884 | 29 | #include "random-util.h" |
8fcde012 | 30 | #include "stat-util.h" |
8b43440b | 31 | #include "string-table.h" |
07630cea LP |
32 | #include "string-util.h" |
33 | #include "strv.h" | |
fc27088a | 34 | #include "utf8.h" |
af6f0d42 TG |
35 | |
36 | struct link_config_ctx { | |
37 | LIST_HEAD(link_config, links); | |
38 | ||
a5010333 TG |
39 | int ethtool_fd; |
40 | ||
f6194225 TG |
41 | bool enable_name_policy; |
42 | ||
1c4baffc | 43 | sd_netlink *rtnl; |
43b3a5ef | 44 | |
dc0d4078 | 45 | usec_t network_dirs_ts_usec; |
af6f0d42 TG |
46 | }; |
47 | ||
75db809a | 48 | static link_config* link_config_free(link_config *link) { |
9a4b012e | 49 | if (!link) |
75db809a | 50 | return NULL; |
5b9d4dc0 | 51 | |
9a4b012e TG |
52 | free(link->filename); |
53 | ||
5722fb89 | 54 | net_match_clear(&link->match); |
c4f58dea | 55 | condition_free_list(link->conditions); |
9a4b012e TG |
56 | |
57 | free(link->description); | |
58 | free(link->mac); | |
59 | free(link->name_policy); | |
60 | free(link->name); | |
a5053a15 | 61 | strv_free(link->alternative_names); |
ef1d2c07 | 62 | free(link->alternative_names_policy); |
9a4b012e TG |
63 | free(link->alias); |
64 | ||
75db809a | 65 | return mfree(link); |
af6f0d42 TG |
66 | } |
67 | ||
9a4b012e TG |
68 | DEFINE_TRIVIAL_CLEANUP_FUNC(link_config*, link_config_free); |
69 | ||
af6f0d42 TG |
70 | static void link_configs_free(link_config_ctx *ctx) { |
71 | link_config *link, *link_next; | |
72 | ||
73 | if (!ctx) | |
74 | return; | |
75 | ||
9a4b012e TG |
76 | LIST_FOREACH_SAFE(links, link, link_next, ctx->links) |
77 | link_config_free(link); | |
af6f0d42 TG |
78 | } |
79 | ||
75db809a | 80 | link_config_ctx* link_config_ctx_free(link_config_ctx *ctx) { |
af6f0d42 | 81 | if (!ctx) |
75db809a | 82 | return NULL; |
af6f0d42 | 83 | |
03e334a1 | 84 | safe_close(ctx->ethtool_fd); |
1c4baffc | 85 | sd_netlink_unref(ctx->rtnl); |
af6f0d42 | 86 | link_configs_free(ctx); |
75db809a | 87 | return mfree(ctx); |
af6f0d42 TG |
88 | } |
89 | ||
9a4b012e TG |
90 | int link_config_ctx_new(link_config_ctx **ret) { |
91 | _cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL; | |
92 | ||
93 | if (!ret) | |
94 | return -EINVAL; | |
95 | ||
96 | ctx = new0(link_config_ctx, 1); | |
97 | if (!ctx) | |
98 | return -ENOMEM; | |
99 | ||
100 | LIST_HEAD_INIT(ctx->links); | |
101 | ||
102 | ctx->ethtool_fd = -1; | |
103 | ||
104 | ctx->enable_name_policy = true; | |
105 | ||
1cc6c93a | 106 | *ret = TAKE_PTR(ctx); |
9a4b012e TG |
107 | |
108 | return 0; | |
109 | } | |
110 | ||
a378400b | 111 | int link_load_one(link_config_ctx *ctx, const char *filename) { |
9a4b012e | 112 | _cleanup_(link_config_freep) link_config *link = NULL; |
6cdab9f1 | 113 | _cleanup_free_ char *name = NULL; |
e406e8a2 | 114 | const char *dropin_dirname; |
79a60834 | 115 | size_t i; |
af6f0d42 TG |
116 | int r; |
117 | ||
187dc6e5 TA |
118 | assert(ctx); |
119 | assert(filename); | |
120 | ||
e8e2788d YW |
121 | r = null_or_empty_path(filename); |
122 | if (r == -ENOENT) | |
123 | return 0; | |
124 | if (r < 0) | |
125 | return r; | |
126 | if (r > 0) { | |
ed88bcfb ZJS |
127 | log_debug("Skipping empty file: %s", filename); |
128 | return 0; | |
129 | } | |
130 | ||
6cdab9f1 YW |
131 | name = strdup(filename); |
132 | if (!name) | |
133 | return -ENOMEM; | |
134 | ||
135 | link = new(link_config, 1); | |
ecb08ec6 | 136 | if (!link) |
e8a42907 | 137 | return -ENOMEM; |
af6f0d42 | 138 | |
6cdab9f1 YW |
139 | *link = (link_config) { |
140 | .filename = TAKE_PTR(name), | |
54ed9f88 | 141 | .mac_address_policy = _MAC_ADDRESS_POLICY_INVALID, |
6cdab9f1 YW |
142 | .wol = _WOL_INVALID, |
143 | .duplex = _DUP_INVALID, | |
144 | .port = _NET_DEV_PORT_INVALID, | |
145 | .autonegotiation = -1, | |
a34811e4 YW |
146 | .rx_flow_control = -1, |
147 | .tx_flow_control = -1, | |
148 | .autoneg_flow_control = -1, | |
ef4a91a7 | 149 | .txqueuelen = UINT32_MAX, |
6cdab9f1 | 150 | }; |
5fde13d7 | 151 | |
79a60834 | 152 | for (i = 0; i < ELEMENTSOF(link->features); i++) |
cc2ff878 | 153 | link->features[i] = -1; |
50725d10 | 154 | |
e406e8a2 YW |
155 | dropin_dirname = strjoina(basename(filename), ".d"); |
156 | r = config_parse_many( | |
157 | STRV_MAKE_CONST(filename), | |
158 | (const char* const*) CONF_PATHS_STRV("systemd/network"), | |
159 | dropin_dirname, | |
160 | "Match\0Link\0", | |
161 | config_item_perf_lookup, link_config_gperf_lookup, | |
162 | CONFIG_PARSE_WARN, link, NULL); | |
36f822c4 | 163 | if (r < 0) |
ecb08ec6 | 164 | return r; |
af6f0d42 | 165 | |
5722fb89 | 166 | if (net_match_is_empty(&link->match) && !link->conditions) { |
dade7349 ZJS |
167 | log_warning("%s: No valid settings found in the [Match] section, ignoring file. " |
168 | "To match all interfaces, add OriginalName=* in the [Match] section.", | |
84ea567e | 169 | filename); |
dade7349 ZJS |
170 | return 0; |
171 | } | |
84ea567e | 172 | |
a0b191b7 | 173 | if (!condition_test_list(link->conditions, environ, NULL, NULL, NULL)) { |
176d9c0e YW |
174 | log_debug("%s: Conditions do not match the system environment, skipping.", filename); |
175 | return 0; | |
176 | } | |
177 | ||
a7a12bf4 YW |
178 | if (IN_SET(link->mac_address_policy, MAC_ADDRESS_POLICY_PERSISTENT, MAC_ADDRESS_POLICY_RANDOM) && link->mac) { |
179 | log_warning("%s: MACAddress= in [Link] section will be ignored when MACAddressPolicy= " | |
180 | "is set to \"persistent\" or \"random\".", | |
181 | filename); | |
182 | link->mac = mfree(link->mac); | |
183 | } | |
184 | ||
6cdab9f1 | 185 | log_debug("Parsed configuration file %s", filename); |
af6f0d42 | 186 | |
4b4a6c9b | 187 | LIST_PREPEND(links, ctx->links, TAKE_PTR(link)); |
af6f0d42 | 188 | return 0; |
af6f0d42 TG |
189 | } |
190 | ||
f6194225 | 191 | static bool enable_name_policy(void) { |
1d84ad94 | 192 | bool b; |
f6194225 | 193 | |
1d84ad94 | 194 | return proc_cmdline_get_bool("net.ifnames", &b) <= 0 || b; |
f6194225 TG |
195 | } |
196 | ||
015b097c | 197 | static int link_unsigned_attribute(sd_device *device, const char *attr, unsigned *type) { |
0b189e8f ZJS |
198 | const char *s; |
199 | int r; | |
200 | ||
015b097c | 201 | r = sd_device_get_sysattr_value(device, attr, &s); |
0b189e8f | 202 | if (r < 0) |
015b097c | 203 | return log_device_debug_errno(device, r, "Failed to query %s: %m", attr); |
0b189e8f ZJS |
204 | |
205 | r = safe_atou(s, type); | |
206 | if (r < 0) | |
015b097c | 207 | return log_device_warning_errno(device, r, "Failed to parse %s \"%s\": %m", attr, s); |
0b189e8f | 208 | |
015b097c | 209 | log_device_debug(device, "Device has %s=%u", attr, *type); |
0b189e8f ZJS |
210 | return 0; |
211 | } | |
212 | ||
af6f0d42 | 213 | int link_config_load(link_config_ctx *ctx) { |
b9c54c46 | 214 | _cleanup_strv_free_ char **files = NULL; |
edf029b7 | 215 | char **f; |
a39f92d3 | 216 | int r; |
af6f0d42 TG |
217 | |
218 | link_configs_free(ctx); | |
219 | ||
f6194225 TG |
220 | if (!enable_name_policy()) { |
221 | ctx->enable_name_policy = false; | |
3f85ef0f | 222 | log_info("Network interface NamePolicy= disabled on kernel command line, ignoring."); |
f6194225 TG |
223 | } |
224 | ||
97f2d76d | 225 | /* update timestamp */ |
dc0d4078 | 226 | paths_check_timestamp(NETWORK_DIRS, &ctx->network_dirs_ts_usec, true); |
af6f0d42 | 227 | |
dc0d4078 | 228 | r = conf_files_list_strv(&files, ".link", NULL, 0, NETWORK_DIRS); |
f647962d MS |
229 | if (r < 0) |
230 | return log_error_errno(r, "failed to enumerate link files: %m"); | |
af6f0d42 TG |
231 | |
232 | STRV_FOREACH_BACKWARDS(f, files) { | |
a378400b | 233 | r = link_load_one(ctx, *f); |
af6f0d42 | 234 | if (r < 0) |
e8a42907 | 235 | log_error_errno(r, "Failed to load %s, ignoring: %m", *f); |
af6f0d42 TG |
236 | } |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | bool link_config_should_reload(link_config_ctx *ctx) { | |
dc0d4078 | 242 | return paths_check_timestamp(NETWORK_DIRS, &ctx->network_dirs_ts_usec, false); |
af6f0d42 TG |
243 | } |
244 | ||
e5eadf53 | 245 | int link_config_get(link_config_ctx *ctx, sd_device *device, link_config **ret) { |
f5767302 | 246 | unsigned name_assign_type = NET_NAME_UNKNOWN; |
4bb7cc82 | 247 | struct ether_addr permanent_mac = {}; |
ef62949a | 248 | unsigned short iftype = 0; |
af6f0d42 | 249 | link_config *link; |
4bb7cc82 | 250 | const char *name; |
ef62949a | 251 | int ifindex, r; |
af6f0d42 | 252 | |
3b64e4d4 TG |
253 | assert(ctx); |
254 | assert(device); | |
255 | assert(ret); | |
256 | ||
4bb7cc82 YW |
257 | r = sd_device_get_sysname(device, &name); |
258 | if (r < 0) | |
259 | return r; | |
260 | ||
ef62949a YW |
261 | r = sd_device_get_ifindex(device, &ifindex); |
262 | if (r < 0) | |
263 | return r; | |
264 | ||
265 | r = rtnl_get_link_iftype(&ctx->rtnl, ifindex, &iftype); | |
266 | if (r < 0) | |
267 | return r; | |
268 | ||
4bb7cc82 YW |
269 | r = ethtool_get_permanent_macaddr(&ctx->ethtool_fd, name, &permanent_mac); |
270 | if (r < 0) | |
271 | log_device_debug_errno(device, r, "Failed to get permanent MAC address, ignoring: %m"); | |
272 | ||
f5767302 YW |
273 | (void) link_unsigned_attribute(device, "name_assign_type", &name_assign_type); |
274 | ||
af6f0d42 | 275 | LIST_FOREACH(links, link, ctx->links) { |
1a3caa49 YW |
276 | r = net_match_config(&link->match, device, NULL, &permanent_mac, NULL, iftype, NULL, NULL, 0, NULL, NULL); |
277 | if (r < 0) | |
278 | return r; | |
279 | if (r == 0) | |
280 | continue; | |
281 | ||
282 | if (link->match.ifname && !strv_contains(link->match.ifname, "*") && name_assign_type == NET_NAME_ENUM) | |
283 | log_device_warning(device, "Config file %s is applied to device based on potentially unpredictable interface name.", | |
284 | link->filename); | |
285 | else | |
286 | log_device_debug(device, "Config file %s is applied", link->filename); | |
287 | ||
288 | *ret = link; | |
289 | return 0; | |
af6f0d42 TG |
290 | } |
291 | ||
292 | return -ENOENT; | |
293 | } | |
294 | ||
2e17fed5 YW |
295 | static int link_config_apply_ethtool_settings(int *ethtool_fd, const link_config *config, sd_device *device) { |
296 | const char *name; | |
297 | int r; | |
298 | ||
299 | assert(ethtool_fd); | |
300 | assert(config); | |
301 | assert(device); | |
302 | ||
303 | r = sd_device_get_sysname(device, &name); | |
304 | if (r < 0) | |
305 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); | |
306 | ||
307 | r = ethtool_set_glinksettings(ethtool_fd, name, | |
308 | config->autonegotiation, config->advertise, | |
309 | config->speed, config->duplex, config->port); | |
310 | if (r < 0) { | |
a7994dd3 YW |
311 | if (config->autonegotiation >= 0) |
312 | log_device_warning_errno(device, r, "Could not %s auto negotiation, ignoring: %m", | |
313 | enable_disable(config->autonegotiation)); | |
2e17fed5 YW |
314 | |
315 | if (!eqzero(config->advertise)) | |
a7994dd3 YW |
316 | log_device_warning_errno(device, r, "Could not set advertise mode, ignoring: %m"); |
317 | ||
318 | if (config->speed > 0) | |
319 | log_device_warning_errno(device, r, "Could not set speed to %"PRIu64"Mbps, ignoring: %m", | |
320 | DIV_ROUND_UP(config->speed, 1000000)); | |
321 | ||
322 | if (config->duplex >= 0) | |
323 | log_device_warning_errno(device, r, "Could not set duplex to %s, ignoring: %m", | |
324 | duplex_to_string(config->duplex)); | |
325 | ||
326 | if (config->port >= 0) | |
327 | log_device_warning_errno(device, r, "Could not set port to '%s', ignoring: %m", | |
328 | port_to_string(config->port)); | |
2e17fed5 YW |
329 | } |
330 | ||
331 | r = ethtool_set_wol(ethtool_fd, name, config->wol); | |
332 | if (r < 0) | |
a7994dd3 YW |
333 | log_device_warning_errno(device, r, "Could not set WakeOnLan to %s, ignoring: %m", |
334 | wol_to_string(config->wol)); | |
2e17fed5 YW |
335 | |
336 | r = ethtool_set_features(ethtool_fd, name, config->features); | |
337 | if (r < 0) | |
338 | log_device_warning_errno(device, r, "Could not set offload features, ignoring: %m"); | |
339 | ||
80662eec YW |
340 | r = ethtool_set_channels(ethtool_fd, name, &config->channels); |
341 | if (r < 0) | |
342 | log_device_warning_errno(device, r, "Could not set channels, ignoring: %m"); | |
2e17fed5 | 343 | |
80662eec YW |
344 | r = ethtool_set_nic_buffer_size(ethtool_fd, name, &config->ring); |
345 | if (r < 0) | |
346 | log_device_warning_errno(device, r, "Could not set ring buffer, ignoring: %m"); | |
2e17fed5 | 347 | |
80662eec YW |
348 | r = ethtool_set_flow_control(ethtool_fd, name, config->rx_flow_control, config->tx_flow_control, config->autoneg_flow_control); |
349 | if (r < 0) | |
350 | log_device_warning_errno(device, r, "Could not set flow control, ignoring: %m"); | |
2e17fed5 YW |
351 | |
352 | return 0; | |
353 | } | |
354 | ||
54ed9f88 | 355 | static int get_mac(sd_device *device, MACAddressPolicy policy, struct ether_addr *mac) { |
015b097c | 356 | unsigned addr_type; |
54ed9f88 | 357 | bool want_random = policy == MAC_ADDRESS_POLICY_RANDOM; |
f1ac7002 | 358 | int r; |
16b9b87a | 359 | |
54ed9f88 | 360 | assert(IN_SET(policy, MAC_ADDRESS_POLICY_RANDOM, MAC_ADDRESS_POLICY_PERSISTENT)); |
3c9b8860 | 361 | |
015b097c | 362 | r = link_unsigned_attribute(device, "addr_assign_type", &addr_type); |
f1ac7002 | 363 | if (r < 0) |
015b097c ZJS |
364 | return r; |
365 | switch (addr_type) { | |
366 | case NET_ADDR_SET: | |
9d9fed9e ZJS |
367 | log_device_debug(device, "MAC on the device already set by userspace"); |
368 | return 0; | |
015b097c | 369 | case NET_ADDR_STOLEN: |
9d9fed9e ZJS |
370 | log_device_debug(device, "MAC on the device already set based on another device"); |
371 | return 0; | |
015b097c ZJS |
372 | case NET_ADDR_RANDOM: |
373 | case NET_ADDR_PERM: | |
374 | break; | |
375 | default: | |
09c69eca YW |
376 | log_device_warning(device, "Unknown addr_assign_type %u, ignoring", addr_type); |
377 | return 0; | |
015b097c | 378 | } |
04b67d49 | 379 | |
9d9fed9e ZJS |
380 | if (want_random == (addr_type == NET_ADDR_RANDOM)) { |
381 | log_device_debug(device, "MAC on the device already matches policy *%s*", | |
382 | mac_address_policy_to_string(policy)); | |
383 | return 0; | |
384 | } | |
16b9b87a | 385 | |
015b097c ZJS |
386 | if (want_random) { |
387 | log_device_debug(device, "Using random bytes to generate MAC"); | |
550c8784 LP |
388 | |
389 | /* We require genuine randomness here, since we want to make sure we won't collide with other | |
390 | * systems booting up at the very same time. We do allow RDRAND however, since this is not | |
391 | * cryptographic key material. */ | |
a745117d LP |
392 | r = genuine_random_bytes(mac->ether_addr_octet, ETH_ALEN, RANDOM_ALLOW_RDRAND); |
393 | if (r < 0) | |
394 | return log_device_error_errno(device, r, "Failed to acquire random data to generate MAC: %m"); | |
015b097c | 395 | } else { |
dbe81cbd | 396 | uint64_t result; |
9bf3b535 | 397 | |
96848152 ZJS |
398 | r = net_get_unique_predictable_data(device, |
399 | naming_scheme_has(NAMING_STABLE_VIRTUAL_MACS), | |
400 | &result); | |
16b9b87a | 401 | if (r < 0) |
015b097c | 402 | return log_device_warning_errno(device, r, "Could not generate persistent MAC: %m"); |
16b9b87a | 403 | |
96848152 | 404 | log_device_debug(device, "Using generated persistent MAC address"); |
9bf3b535 | 405 | assert_cc(ETH_ALEN <= sizeof(result)); |
dbe81cbd | 406 | memcpy(mac->ether_addr_octet, &result, ETH_ALEN); |
16b9b87a TG |
407 | } |
408 | ||
409 | /* see eth_random_addr in the kernel */ | |
3c9b8860 TG |
410 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ |
411 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
015b097c | 412 | return 1; |
16b9b87a TG |
413 | } |
414 | ||
2e17fed5 YW |
415 | static int link_config_apply_rtnl_settings(sd_netlink **rtnl, const link_config *config, sd_device *device) { |
416 | struct ether_addr generated_mac, *mac = NULL; | |
417 | int ifindex, r; | |
af6f0d42 | 418 | |
2e17fed5 | 419 | assert(rtnl); |
3e137a1b TG |
420 | assert(config); |
421 | assert(device); | |
3e137a1b | 422 | |
2e17fed5 | 423 | r = sd_device_get_ifindex(device, &ifindex); |
e5eadf53 | 424 | if (r < 0) |
2e17fed5 | 425 | return log_device_error_errno(device, r, "Could not find ifindex: %m"); |
af6f0d42 | 426 | |
2e17fed5 YW |
427 | if (IN_SET(config->mac_address_policy, MAC_ADDRESS_POLICY_PERSISTENT, MAC_ADDRESS_POLICY_RANDOM)) { |
428 | if (get_mac(device, config->mac_address_policy, &generated_mac) > 0) | |
429 | mac = &generated_mac; | |
430 | } else | |
431 | mac = config->mac; | |
af6f0d42 | 432 | |
face9fcc YW |
433 | r = rtnl_set_link_properties(rtnl, ifindex, config->alias, mac, |
434 | config->txqueues, config->rxqueues, config->txqueuelen, | |
435 | config->mtu, config->gso_max_size, config->gso_max_segments); | |
50725d10 | 436 | if (r < 0) |
face9fcc YW |
437 | log_device_warning_errno(device, r, |
438 | "Could not set Alias=, MACAddress=, " | |
439 | "TransmitQueues=, ReceiveQueues=, TransmitQueueLength=, MTU=, " | |
440 | "GenericSegmentOffloadMaxBytes= or GenericSegmentOffloadMaxSegments=, " | |
441 | "ignoring: %m"); | |
50725d10 | 442 | |
2e17fed5 YW |
443 | return 0; |
444 | } | |
224ded67 | 445 | |
2e17fed5 YW |
446 | static int link_config_generate_new_name(const link_config_ctx *ctx, const link_config *config, sd_device *device, const char **ret_name) { |
447 | unsigned name_type = NET_NAME_UNKNOWN; | |
2e17fed5 | 448 | int r; |
a34811e4 | 449 | |
2e17fed5 YW |
450 | assert(ctx); |
451 | assert(config); | |
452 | assert(device); | |
453 | assert(ret_name); | |
43b3a5ef | 454 | |
015b097c | 455 | (void) link_unsigned_attribute(device, "name_assign_type", &name_type); |
0b189e8f | 456 | |
73d2bb08 ZJS |
457 | if (IN_SET(name_type, NET_NAME_USER, NET_NAME_RENAMED) |
458 | && !naming_scheme_has(NAMING_ALLOW_RERENAMES)) { | |
459 | log_device_debug(device, "Device already has a name given by userspace, not renaming."); | |
460 | goto no_rename; | |
461 | } | |
462 | ||
0b189e8f | 463 | if (ctx->enable_name_policy && config->name_policy) |
78f8849f | 464 | for (NamePolicy *p = config->name_policy; *p != _NAMEPOLICY_INVALID; p++) { |
5cdb3f70 YW |
465 | const char *new_name = NULL; |
466 | NamePolicy policy = *p; | |
0b189e8f ZJS |
467 | |
468 | switch (policy) { | |
469 | case NAMEPOLICY_KERNEL: | |
470 | if (name_type != NET_NAME_PREDICTABLE) | |
471 | continue; | |
472 | ||
473 | /* The kernel claims to have given a predictable name, keep it. */ | |
474 | log_device_debug(device, "Policy *%s*: keeping predictable kernel name", | |
475 | name_policy_to_string(policy)); | |
476 | goto no_rename; | |
3907446f ZJS |
477 | case NAMEPOLICY_KEEP: |
478 | if (!IN_SET(name_type, NET_NAME_USER, NET_NAME_RENAMED)) | |
479 | continue; | |
480 | ||
481 | log_device_debug(device, "Policy *%s*: keeping existing userspace name", | |
482 | name_policy_to_string(policy)); | |
483 | goto no_rename; | |
0b189e8f ZJS |
484 | case NAMEPOLICY_DATABASE: |
485 | (void) sd_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE", &new_name); | |
486 | break; | |
487 | case NAMEPOLICY_ONBOARD: | |
488 | (void) sd_device_get_property_value(device, "ID_NET_NAME_ONBOARD", &new_name); | |
489 | break; | |
490 | case NAMEPOLICY_SLOT: | |
491 | (void) sd_device_get_property_value(device, "ID_NET_NAME_SLOT", &new_name); | |
492 | break; | |
493 | case NAMEPOLICY_PATH: | |
494 | (void) sd_device_get_property_value(device, "ID_NET_NAME_PATH", &new_name); | |
495 | break; | |
496 | case NAMEPOLICY_MAC: | |
497 | (void) sd_device_get_property_value(device, "ID_NET_NAME_MAC", &new_name); | |
498 | break; | |
499 | default: | |
500 | assert_not_reached("invalid policy"); | |
5fde13d7 | 501 | } |
5cdb3f70 YW |
502 | if (ifname_valid(new_name)) { |
503 | log_device_debug(device, "Policy *%s* yields \"%s\".", name_policy_to_string(policy), new_name); | |
504 | *ret_name = new_name; | |
505 | return 0; | |
506 | } | |
daeb71a3 | 507 | } |
daeb71a3 | 508 | |
2e17fed5 YW |
509 | if (config->name) { |
510 | log_device_debug(device, "Policies didn't yield a name, using specified Name=%s.", config->name); | |
511 | *ret_name = config->name; | |
512 | return 0; | |
513 | } | |
16b9b87a | 514 | |
2e17fed5 YW |
515 | log_device_debug(device, "Policies didn't yield a name and Name= is not given, not renaming."); |
516 | no_rename: | |
517 | r = sd_device_get_sysname(device, ret_name); | |
f647962d | 518 | if (r < 0) |
2e17fed5 YW |
519 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
524 | static int link_config_apply_alternative_names(sd_netlink **rtnl, const link_config *config, sd_device *device, const char *new_name) { | |
525 | _cleanup_strv_free_ char **altnames = NULL, **current_altnames = NULL; | |
526 | const char *current_name; | |
527 | int ifindex, r; | |
528 | ||
529 | assert(rtnl); | |
530 | assert(config); | |
531 | assert(device); | |
532 | ||
533 | r = sd_device_get_sysname(device, ¤t_name); | |
534 | if (r < 0) | |
535 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); | |
536 | ||
537 | r = sd_device_get_ifindex(device, &ifindex); | |
538 | if (r < 0) | |
539 | return log_device_error_errno(device, r, "Could not find ifindex: %m"); | |
43b3a5ef | 540 | |
ef1d2c07 YW |
541 | if (config->alternative_names) { |
542 | altnames = strv_copy(config->alternative_names); | |
543 | if (!altnames) | |
544 | return log_oom(); | |
545 | } | |
546 | ||
547 | if (config->alternative_names_policy) | |
548 | for (NamePolicy *p = config->alternative_names_policy; *p != _NAMEPOLICY_INVALID; p++) { | |
61fd7d67 | 549 | const char *n = NULL; |
ef1d2c07 YW |
550 | |
551 | switch (*p) { | |
552 | case NAMEPOLICY_DATABASE: | |
553 | (void) sd_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE", &n); | |
554 | break; | |
555 | case NAMEPOLICY_ONBOARD: | |
556 | (void) sd_device_get_property_value(device, "ID_NET_NAME_ONBOARD", &n); | |
557 | break; | |
558 | case NAMEPOLICY_SLOT: | |
559 | (void) sd_device_get_property_value(device, "ID_NET_NAME_SLOT", &n); | |
560 | break; | |
561 | case NAMEPOLICY_PATH: | |
562 | (void) sd_device_get_property_value(device, "ID_NET_NAME_PATH", &n); | |
563 | break; | |
564 | case NAMEPOLICY_MAC: | |
565 | (void) sd_device_get_property_value(device, "ID_NET_NAME_MAC", &n); | |
566 | break; | |
567 | default: | |
568 | assert_not_reached("invalid policy"); | |
569 | } | |
570 | if (!isempty(n)) { | |
571 | r = strv_extend(&altnames, n); | |
572 | if (r < 0) | |
573 | return log_oom(); | |
574 | } | |
575 | } | |
576 | ||
577 | if (new_name) | |
578 | strv_remove(altnames, new_name); | |
2e17fed5 | 579 | strv_remove(altnames, current_name); |
97fdae33 | 580 | |
2e17fed5 | 581 | r = rtnl_get_link_alternative_names(rtnl, ifindex, ¤t_altnames); |
97fdae33 | 582 | if (r < 0) |
2e17fed5 | 583 | log_device_debug_errno(device, r, "Failed to get alternative names, ignoring: %m"); |
97fdae33 YW |
584 | |
585 | char **p; | |
586 | STRV_FOREACH(p, current_altnames) | |
587 | strv_remove(altnames, *p); | |
588 | ||
ef1d2c07 | 589 | strv_uniq(altnames); |
4d016e96 | 590 | strv_sort(altnames); |
2e17fed5 YW |
591 | r = rtnl_set_link_alternative_names(rtnl, ifindex, altnames); |
592 | if (r < 0) | |
593 | log_device_full_errno(device, r == -EOPNOTSUPP ? LOG_DEBUG : LOG_WARNING, r, | |
594 | "Could not set AlternativeName= or apply AlternativeNamesPolicy=, ignoring: %m"); | |
595 | ||
596 | return 0; | |
597 | } | |
a5053a15 | 598 | |
2e17fed5 YW |
599 | int link_config_apply(link_config_ctx *ctx, const link_config *config, sd_device *device, const char **ret_name) { |
600 | const char *new_name; | |
a1130022 | 601 | sd_device_action_t a; |
2e17fed5 YW |
602 | int r; |
603 | ||
604 | assert(ctx); | |
605 | assert(config); | |
606 | assert(device); | |
607 | assert(ret_name); | |
608 | ||
a1130022 | 609 | r = sd_device_get_action(device, &a); |
e0e789c1 YW |
610 | if (r < 0) |
611 | return log_device_error_errno(device, r, "Failed to get ACTION= property: %m"); | |
612 | ||
a1130022 | 613 | if (!IN_SET(a, SD_DEVICE_ADD, SD_DEVICE_BIND, SD_DEVICE_MOVE)) { |
e0e789c1 YW |
614 | log_device_debug(device, "Skipping to apply .link settings on '%s' uevent.", device_action_to_string(a)); |
615 | ||
616 | r = sd_device_get_sysname(device, ret_name); | |
617 | if (r < 0) | |
618 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
2e17fed5 YW |
623 | r = link_config_apply_ethtool_settings(&ctx->ethtool_fd, config, device); |
624 | if (r < 0) | |
625 | return r; | |
626 | ||
627 | r = link_config_apply_rtnl_settings(&ctx->rtnl, config, device); | |
628 | if (r < 0) | |
629 | return r; | |
630 | ||
a1130022 | 631 | if (a == SD_DEVICE_MOVE) { |
e0e789c1 YW |
632 | log_device_debug(device, "Skipping to apply Name= and NamePolicy= on '%s' uevent.", device_action_to_string(a)); |
633 | ||
634 | r = sd_device_get_sysname(device, &new_name); | |
635 | if (r < 0) | |
636 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); | |
637 | } else { | |
638 | r = link_config_generate_new_name(ctx, config, device, &new_name); | |
639 | if (r < 0) | |
640 | return r; | |
641 | } | |
2e17fed5 YW |
642 | |
643 | r = link_config_apply_alternative_names(&ctx->rtnl, config, device, new_name); | |
644 | if (r < 0) | |
645 | return r; | |
d95b83b8 | 646 | |
2e17fed5 | 647 | *ret_name = new_name; |
af6f0d42 TG |
648 | return 0; |
649 | } | |
be32eb9b | 650 | |
e5eadf53 | 651 | int link_get_driver(link_config_ctx *ctx, sd_device *device, char **ret) { |
847a8a5f | 652 | const char *name; |
a7f7d1bd | 653 | char *driver = NULL; |
847a8a5f TG |
654 | int r; |
655 | ||
e5eadf53 YW |
656 | r = sd_device_get_sysname(device, &name); |
657 | if (r < 0) | |
658 | return r; | |
847a8a5f | 659 | |
aedca892 | 660 | r = ethtool_get_driver(&ctx->ethtool_fd, name, &driver); |
847a8a5f TG |
661 | if (r < 0) |
662 | return r; | |
663 | ||
664 | *ret = driver; | |
665 | return 0; | |
666 | } | |
667 | ||
fc27088a YW |
668 | int config_parse_ifalias( |
669 | const char *unit, | |
670 | const char *filename, | |
671 | unsigned line, | |
672 | const char *section, | |
673 | unsigned section_line, | |
674 | const char *lvalue, | |
675 | int ltype, | |
676 | const char *rvalue, | |
677 | void *data, | |
678 | void *userdata) { | |
679 | ||
680 | char **s = data; | |
681 | ||
682 | assert(filename); | |
683 | assert(lvalue); | |
684 | assert(rvalue); | |
685 | assert(data); | |
686 | ||
687 | if (!isempty(rvalue)) { | |
688 | *s = mfree(*s); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | if (!ascii_is_valid(rvalue)) { | |
693 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
694 | "Interface alias is not ASCII clean, ignoring assignment: %s", rvalue); | |
695 | return 0; | |
696 | } | |
697 | ||
698 | if (strlen(rvalue) >= IFALIASZ) { | |
699 | log_syntax(unit, LOG_WARNING, filename, line, 0, | |
700 | "Interface alias is too long, ignoring assignment: %s", rvalue); | |
701 | return 0; | |
702 | } | |
703 | ||
b3f9c17a | 704 | return free_and_strdup_warn(s, rvalue); |
fc27088a YW |
705 | } |
706 | ||
face9fcc YW |
707 | int config_parse_rx_tx_queues( |
708 | const char *unit, | |
709 | const char *filename, | |
710 | unsigned line, | |
711 | const char *section, | |
712 | unsigned section_line, | |
713 | const char *lvalue, | |
714 | int ltype, | |
715 | const char *rvalue, | |
716 | void *data, | |
717 | void *userdata) { | |
718 | ||
719 | uint32_t k, *v = data; | |
720 | int r; | |
721 | ||
722 | if (isempty(rvalue)) { | |
723 | *v = 0; | |
724 | return 0; | |
725 | } | |
726 | ||
727 | r = safe_atou32(rvalue, &k); | |
728 | if (r < 0) { | |
729 | log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s.", lvalue, rvalue); | |
730 | return 0; | |
731 | } | |
732 | if (k == 0 || k > 4096) { | |
733 | log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid %s=, ignoring assignment: %s.", lvalue, rvalue); | |
734 | return 0; | |
735 | } | |
736 | ||
737 | *v = k; | |
738 | return 0; | |
739 | } | |
740 | ||
ef4a91a7 UÖ |
741 | int config_parse_txqueuelen( |
742 | const char *unit, | |
743 | const char *filename, | |
744 | unsigned line, | |
745 | const char *section, | |
746 | unsigned section_line, | |
747 | const char *lvalue, | |
748 | int ltype, | |
749 | const char *rvalue, | |
750 | void *data, | |
751 | void *userdata) { | |
752 | ||
753 | uint32_t k, *v = data; | |
754 | int r; | |
755 | ||
756 | if (isempty(rvalue)) { | |
757 | *v = UINT32_MAX; | |
758 | return 0; | |
759 | } | |
760 | ||
761 | r = safe_atou32(rvalue, &k); | |
762 | if (r < 0) { | |
763 | log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s.", lvalue, rvalue); | |
764 | return 0; | |
765 | } | |
766 | if (k == UINT32_MAX) { | |
767 | log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid %s=, ignoring assignment: %s.", lvalue, rvalue); | |
768 | return 0; | |
769 | } | |
770 | ||
771 | *v = k; | |
772 | return 0; | |
773 | } | |
774 | ||
54ed9f88 ZJS |
775 | static const char* const mac_address_policy_table[_MAC_ADDRESS_POLICY_MAX] = { |
776 | [MAC_ADDRESS_POLICY_PERSISTENT] = "persistent", | |
777 | [MAC_ADDRESS_POLICY_RANDOM] = "random", | |
778 | [MAC_ADDRESS_POLICY_NONE] = "none", | |
be32eb9b TG |
779 | }; |
780 | ||
54ed9f88 | 781 | DEFINE_STRING_TABLE_LOOKUP(mac_address_policy, MACAddressPolicy); |
d03cb6b8 YW |
782 | DEFINE_CONFIG_PARSE_ENUM_WITH_DEFAULT( |
783 | config_parse_mac_address_policy, | |
784 | mac_address_policy, | |
785 | MACAddressPolicy, | |
786 | MAC_ADDRESS_POLICY_NONE, | |
787 | "Failed to parse MAC address policy"); | |
be32eb9b | 788 | |
2c5859af | 789 | static const char* const name_policy_table[_NAMEPOLICY_MAX] = { |
04b67d49 | 790 | [NAMEPOLICY_KERNEL] = "kernel", |
3907446f | 791 | [NAMEPOLICY_KEEP] = "keep", |
e51660ae | 792 | [NAMEPOLICY_DATABASE] = "database", |
be32eb9b TG |
793 | [NAMEPOLICY_ONBOARD] = "onboard", |
794 | [NAMEPOLICY_SLOT] = "slot", | |
795 | [NAMEPOLICY_PATH] = "path", | |
3907446f | 796 | [NAMEPOLICY_MAC] = "mac", |
be32eb9b TG |
797 | }; |
798 | ||
799 | DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy); | |
464cf22f TG |
800 | DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy, |
801 | _NAMEPOLICY_INVALID, | |
802 | "Failed to parse interface name policy"); | |
ef1d2c07 YW |
803 | |
804 | static const char* const alternative_names_policy_table[_NAMEPOLICY_MAX] = { | |
805 | [NAMEPOLICY_DATABASE] = "database", | |
806 | [NAMEPOLICY_ONBOARD] = "onboard", | |
807 | [NAMEPOLICY_SLOT] = "slot", | |
808 | [NAMEPOLICY_PATH] = "path", | |
809 | [NAMEPOLICY_MAC] = "mac", | |
810 | }; | |
811 | ||
812 | DEFINE_STRING_TABLE_LOOKUP(alternative_names_policy, NamePolicy); | |
813 | DEFINE_CONFIG_PARSE_ENUMV(config_parse_alternative_names_policy, alternative_names_policy, NamePolicy, | |
814 | _NAMEPOLICY_INVALID, | |
815 | "Failed to parse alternative names policy"); |