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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" |
b355d0c9 | 21 | #include "netif-naming-scheme.h" |
1c4baffc | 22 | #include "netlink-util.h" |
c6f7c917 | 23 | #include "network-internal.h" |
6bedfcbb | 24 | #include "parse-util.h" |
b0c82192 | 25 | #include "path-lookup.h" |
07630cea | 26 | #include "path-util.h" |
4e731273 | 27 | #include "proc-cmdline.h" |
3df3e884 | 28 | #include "random-util.h" |
8fcde012 | 29 | #include "stat-util.h" |
8b43440b | 30 | #include "string-table.h" |
07630cea LP |
31 | #include "string-util.h" |
32 | #include "strv.h" | |
af6f0d42 TG |
33 | |
34 | struct link_config_ctx { | |
35 | LIST_HEAD(link_config, links); | |
36 | ||
a5010333 TG |
37 | int ethtool_fd; |
38 | ||
f6194225 TG |
39 | bool enable_name_policy; |
40 | ||
1c4baffc | 41 | sd_netlink *rtnl; |
43b3a5ef | 42 | |
dc0d4078 | 43 | usec_t network_dirs_ts_usec; |
af6f0d42 TG |
44 | }; |
45 | ||
9a4b012e TG |
46 | static void link_config_free(link_config *link) { |
47 | if (!link) | |
48 | return; | |
5b9d4dc0 | 49 | |
9a4b012e TG |
50 | free(link->filename); |
51 | ||
e90d0374 | 52 | set_free_free(link->match_mac); |
4bb7cc82 | 53 | set_free_free(link->match_permanent_mac); |
43d60b77 TG |
54 | strv_free(link->match_path); |
55 | strv_free(link->match_driver); | |
56 | strv_free(link->match_type); | |
391f6bc1 | 57 | strv_free(link->match_name); |
44005bfb | 58 | strv_free(link->match_property); |
c4f58dea | 59 | condition_free_list(link->conditions); |
9a4b012e TG |
60 | |
61 | free(link->description); | |
62 | free(link->mac); | |
63 | free(link->name_policy); | |
64 | free(link->name); | |
a5053a15 | 65 | strv_free(link->alternative_names); |
ef1d2c07 | 66 | free(link->alternative_names_policy); |
9a4b012e TG |
67 | free(link->alias); |
68 | ||
69 | free(link); | |
af6f0d42 TG |
70 | } |
71 | ||
9a4b012e TG |
72 | DEFINE_TRIVIAL_CLEANUP_FUNC(link_config*, link_config_free); |
73 | ||
af6f0d42 TG |
74 | static void link_configs_free(link_config_ctx *ctx) { |
75 | link_config *link, *link_next; | |
76 | ||
77 | if (!ctx) | |
78 | return; | |
79 | ||
9a4b012e TG |
80 | LIST_FOREACH_SAFE(links, link, link_next, ctx->links) |
81 | link_config_free(link); | |
af6f0d42 TG |
82 | } |
83 | ||
84 | void link_config_ctx_free(link_config_ctx *ctx) { | |
85 | if (!ctx) | |
86 | return; | |
87 | ||
03e334a1 | 88 | safe_close(ctx->ethtool_fd); |
43b3a5ef | 89 | |
1c4baffc | 90 | sd_netlink_unref(ctx->rtnl); |
43b3a5ef | 91 | |
af6f0d42 TG |
92 | link_configs_free(ctx); |
93 | ||
94 | free(ctx); | |
95 | ||
96 | return; | |
97 | } | |
98 | ||
9a4b012e TG |
99 | int link_config_ctx_new(link_config_ctx **ret) { |
100 | _cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL; | |
101 | ||
102 | if (!ret) | |
103 | return -EINVAL; | |
104 | ||
105 | ctx = new0(link_config_ctx, 1); | |
106 | if (!ctx) | |
107 | return -ENOMEM; | |
108 | ||
109 | LIST_HEAD_INIT(ctx->links); | |
110 | ||
111 | ctx->ethtool_fd = -1; | |
112 | ||
113 | ctx->enable_name_policy = true; | |
114 | ||
1cc6c93a | 115 | *ret = TAKE_PTR(ctx); |
9a4b012e TG |
116 | |
117 | return 0; | |
118 | } | |
119 | ||
a378400b | 120 | int link_load_one(link_config_ctx *ctx, const char *filename) { |
9a4b012e | 121 | _cleanup_(link_config_freep) link_config *link = NULL; |
6e37cd2f | 122 | _cleanup_fclose_ FILE *file = NULL; |
6cdab9f1 | 123 | _cleanup_free_ char *name = NULL; |
79a60834 | 124 | size_t i; |
af6f0d42 TG |
125 | int r; |
126 | ||
187dc6e5 TA |
127 | assert(ctx); |
128 | assert(filename); | |
129 | ||
af6f0d42 | 130 | file = fopen(filename, "re"); |
f2d251cd YW |
131 | if (!file) |
132 | return errno == ENOENT ? 0 : -errno; | |
af6f0d42 | 133 | |
ed88bcfb ZJS |
134 | if (null_or_empty_fd(fileno(file))) { |
135 | log_debug("Skipping empty file: %s", filename); | |
136 | return 0; | |
137 | } | |
138 | ||
6cdab9f1 YW |
139 | name = strdup(filename); |
140 | if (!name) | |
141 | return -ENOMEM; | |
142 | ||
143 | link = new(link_config, 1); | |
ecb08ec6 | 144 | if (!link) |
e8a42907 | 145 | return -ENOMEM; |
af6f0d42 | 146 | |
6cdab9f1 YW |
147 | *link = (link_config) { |
148 | .filename = TAKE_PTR(name), | |
54ed9f88 | 149 | .mac_address_policy = _MAC_ADDRESS_POLICY_INVALID, |
6cdab9f1 YW |
150 | .wol = _WOL_INVALID, |
151 | .duplex = _DUP_INVALID, | |
152 | .port = _NET_DEV_PORT_INVALID, | |
153 | .autonegotiation = -1, | |
a34811e4 YW |
154 | .rx_flow_control = -1, |
155 | .tx_flow_control = -1, | |
156 | .autoneg_flow_control = -1, | |
6cdab9f1 | 157 | }; |
5fde13d7 | 158 | |
79a60834 | 159 | for (i = 0; i < ELEMENTSOF(link->features); i++) |
cc2ff878 | 160 | link->features[i] = -1; |
50725d10 | 161 | |
e9f3d2d5 | 162 | r = config_parse(NULL, filename, file, |
c6b3370a | 163 | "Match\0Link\0", |
e9f3d2d5 | 164 | config_item_perf_lookup, link_config_gperf_lookup, |
4f9ff96a LP |
165 | CONFIG_PARSE_WARN, link, |
166 | NULL); | |
36f822c4 | 167 | if (r < 0) |
ecb08ec6 | 168 | return r; |
af6f0d42 | 169 | |
4bb7cc82 YW |
170 | if (set_isempty(link->match_mac) && set_isempty(link->match_permanent_mac) && |
171 | strv_isempty(link->match_path) && strv_isempty(link->match_driver) && strv_isempty(link->match_type) && | |
dade7349 ZJS |
172 | strv_isempty(link->match_name) && strv_isempty(link->match_property) && !link->conditions) { |
173 | log_warning("%s: No valid settings found in the [Match] section, ignoring file. " | |
174 | "To match all interfaces, add OriginalName=* in the [Match] section.", | |
84ea567e | 175 | filename); |
dade7349 ZJS |
176 | return 0; |
177 | } | |
84ea567e | 178 | |
a0b191b7 | 179 | if (!condition_test_list(link->conditions, environ, NULL, NULL, NULL)) { |
176d9c0e YW |
180 | log_debug("%s: Conditions do not match the system environment, skipping.", filename); |
181 | return 0; | |
182 | } | |
183 | ||
6cdab9f1 | 184 | log_debug("Parsed configuration file %s", filename); |
af6f0d42 | 185 | |
4b4a6c9b | 186 | LIST_PREPEND(links, ctx->links, TAKE_PTR(link)); |
af6f0d42 | 187 | return 0; |
af6f0d42 TG |
188 | } |
189 | ||
f6194225 | 190 | static bool enable_name_policy(void) { |
1d84ad94 | 191 | bool b; |
f6194225 | 192 | |
1d84ad94 | 193 | return proc_cmdline_get_bool("net.ifnames", &b) <= 0 || b; |
f6194225 TG |
194 | } |
195 | ||
015b097c | 196 | static int link_unsigned_attribute(sd_device *device, const char *attr, unsigned *type) { |
0b189e8f ZJS |
197 | const char *s; |
198 | int r; | |
199 | ||
015b097c | 200 | r = sd_device_get_sysattr_value(device, attr, &s); |
0b189e8f | 201 | if (r < 0) |
015b097c | 202 | return log_device_debug_errno(device, r, "Failed to query %s: %m", attr); |
0b189e8f ZJS |
203 | |
204 | r = safe_atou(s, type); | |
205 | if (r < 0) | |
015b097c | 206 | return log_device_warning_errno(device, r, "Failed to parse %s \"%s\": %m", attr, s); |
0b189e8f | 207 | |
015b097c | 208 | log_device_debug(device, "Device has %s=%u", attr, *type); |
0b189e8f ZJS |
209 | return 0; |
210 | } | |
211 | ||
af6f0d42 | 212 | int link_config_load(link_config_ctx *ctx) { |
b9c54c46 | 213 | _cleanup_strv_free_ char **files = NULL; |
edf029b7 | 214 | char **f; |
a39f92d3 | 215 | int r; |
af6f0d42 TG |
216 | |
217 | link_configs_free(ctx); | |
218 | ||
f6194225 TG |
219 | if (!enable_name_policy()) { |
220 | ctx->enable_name_policy = false; | |
3f85ef0f | 221 | log_info("Network interface NamePolicy= disabled on kernel command line, ignoring."); |
f6194225 TG |
222 | } |
223 | ||
97f2d76d | 224 | /* update timestamp */ |
dc0d4078 | 225 | paths_check_timestamp(NETWORK_DIRS, &ctx->network_dirs_ts_usec, true); |
af6f0d42 | 226 | |
dc0d4078 | 227 | r = conf_files_list_strv(&files, ".link", NULL, 0, NETWORK_DIRS); |
f647962d MS |
228 | if (r < 0) |
229 | return log_error_errno(r, "failed to enumerate link files: %m"); | |
af6f0d42 TG |
230 | |
231 | STRV_FOREACH_BACKWARDS(f, files) { | |
a378400b | 232 | r = link_load_one(ctx, *f); |
af6f0d42 | 233 | if (r < 0) |
e8a42907 | 234 | log_error_errno(r, "Failed to load %s, ignoring: %m", *f); |
af6f0d42 TG |
235 | } |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | bool link_config_should_reload(link_config_ctx *ctx) { | |
dc0d4078 | 241 | return paths_check_timestamp(NETWORK_DIRS, &ctx->network_dirs_ts_usec, false); |
af6f0d42 TG |
242 | } |
243 | ||
e5eadf53 | 244 | int link_config_get(link_config_ctx *ctx, sd_device *device, link_config **ret) { |
f5767302 | 245 | unsigned name_assign_type = NET_NAME_UNKNOWN; |
4bb7cc82 | 246 | struct ether_addr permanent_mac = {}; |
ef62949a | 247 | unsigned short iftype = 0; |
af6f0d42 | 248 | link_config *link; |
4bb7cc82 | 249 | const char *name; |
ef62949a | 250 | int ifindex, r; |
af6f0d42 | 251 | |
3b64e4d4 TG |
252 | assert(ctx); |
253 | assert(device); | |
254 | assert(ret); | |
255 | ||
4bb7cc82 YW |
256 | r = sd_device_get_sysname(device, &name); |
257 | if (r < 0) | |
258 | return r; | |
259 | ||
ef62949a YW |
260 | r = sd_device_get_ifindex(device, &ifindex); |
261 | if (r < 0) | |
262 | return r; | |
263 | ||
264 | r = rtnl_get_link_iftype(&ctx->rtnl, ifindex, &iftype); | |
265 | if (r < 0) | |
266 | return r; | |
267 | ||
4bb7cc82 YW |
268 | r = ethtool_get_permanent_macaddr(&ctx->ethtool_fd, name, &permanent_mac); |
269 | if (r < 0) | |
270 | log_device_debug_errno(device, r, "Failed to get permanent MAC address, ignoring: %m"); | |
271 | ||
f5767302 YW |
272 | (void) link_unsigned_attribute(device, "name_assign_type", &name_assign_type); |
273 | ||
af6f0d42 | 274 | LIST_FOREACH(links, link, ctx->links) { |
4bb7cc82 | 275 | if (net_match_config(link->match_mac, link->match_permanent_mac, link->match_path, link->match_driver, |
78404d22 | 276 | link->match_type, link->match_name, link->match_property, NULL, NULL, NULL, |
c643bda5 | 277 | device, NULL, &permanent_mac, NULL, iftype, NULL, NULL, 0, NULL, NULL)) { |
32bc8adc | 278 | |
f5767302 YW |
279 | if (link->match_name && !strv_contains(link->match_name, "*") && name_assign_type == NET_NAME_ENUM) |
280 | log_device_warning(device, "Config file %s is applied to device based on potentially unpredictable interface name.", | |
281 | link->filename); | |
282 | else | |
283 | log_device_debug(device, "Config file %s is applied", link->filename); | |
32bc8adc | 284 | |
ca6038b8 | 285 | *ret = link; |
ca6038b8 | 286 | return 0; |
af6f0d42 TG |
287 | } |
288 | } | |
289 | ||
290 | return -ENOENT; | |
291 | } | |
292 | ||
2e17fed5 YW |
293 | static int link_config_apply_ethtool_settings(int *ethtool_fd, const link_config *config, sd_device *device) { |
294 | const char *name; | |
295 | int r; | |
296 | ||
297 | assert(ethtool_fd); | |
298 | assert(config); | |
299 | assert(device); | |
300 | ||
301 | r = sd_device_get_sysname(device, &name); | |
302 | if (r < 0) | |
303 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); | |
304 | ||
305 | r = ethtool_set_glinksettings(ethtool_fd, name, | |
306 | config->autonegotiation, config->advertise, | |
307 | config->speed, config->duplex, config->port); | |
308 | if (r < 0) { | |
309 | if (config->port != _NET_DEV_PORT_INVALID) | |
310 | log_device_warning_errno(device, r, "Could not set port '%s', ignoring: %m", port_to_string(config->port)); | |
311 | ||
312 | if (!eqzero(config->advertise)) | |
313 | log_device_warning_errno(device, r, "Could not set advertise mode, ignoring: %m"); /* TODO: include modes in the log message. */ | |
314 | ||
315 | if (config->speed) { | |
316 | unsigned speed = DIV_ROUND_UP(config->speed, 1000000); | |
317 | if (r == -EOPNOTSUPP) { | |
318 | r = ethtool_set_speed(ethtool_fd, name, speed, config->duplex); | |
319 | if (r < 0) | |
320 | log_device_warning_errno(device, r, "Could not set speed to %uMbps, ignoring: %m", speed); | |
321 | } | |
322 | } | |
323 | ||
324 | if (config->duplex != _DUP_INVALID) | |
325 | log_device_warning_errno(device, r, "Could not set duplex to %s, ignoring: %m", duplex_to_string(config->duplex)); | |
326 | } | |
327 | ||
328 | r = ethtool_set_wol(ethtool_fd, name, config->wol); | |
329 | if (r < 0) | |
330 | log_device_warning_errno(device, r, "Could not set WakeOnLan to %s, ignoring: %m", wol_to_string(config->wol)); | |
331 | ||
332 | r = ethtool_set_features(ethtool_fd, name, config->features); | |
333 | if (r < 0) | |
334 | log_device_warning_errno(device, r, "Could not set offload features, ignoring: %m"); | |
335 | ||
336 | if (config->channels.rx_count_set || config->channels.tx_count_set || config->channels.other_count_set || config->channels.combined_count_set) { | |
337 | r = ethtool_set_channels(ethtool_fd, name, &config->channels); | |
338 | if (r < 0) | |
339 | log_device_warning_errno(device, r, "Could not set channels, ignoring: %m"); | |
340 | } | |
341 | ||
342 | if (config->ring.rx_pending_set || config->ring.rx_mini_pending_set || config->ring.rx_jumbo_pending_set || config->ring.tx_pending_set) { | |
343 | r = ethtool_set_nic_buffer_size(ethtool_fd, name, &config->ring); | |
344 | if (r < 0) | |
345 | log_device_warning_errno(device, r, "Could not set ring buffer, ignoring: %m"); | |
346 | } | |
347 | ||
348 | if (config->rx_flow_control >= 0 || config->tx_flow_control >= 0 || config->autoneg_flow_control >= 0) { | |
349 | r = ethtool_set_flow_control(ethtool_fd, name, config->rx_flow_control, config->tx_flow_control, config->autoneg_flow_control); | |
350 | if (r < 0) | |
351 | log_device_warning_errno(device, r, "Could not set flow control, ignoring: %m"); | |
352 | } | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
54ed9f88 | 357 | static int get_mac(sd_device *device, MACAddressPolicy policy, struct ether_addr *mac) { |
015b097c | 358 | unsigned addr_type; |
54ed9f88 | 359 | bool want_random = policy == MAC_ADDRESS_POLICY_RANDOM; |
f1ac7002 | 360 | int r; |
16b9b87a | 361 | |
54ed9f88 | 362 | assert(IN_SET(policy, MAC_ADDRESS_POLICY_RANDOM, MAC_ADDRESS_POLICY_PERSISTENT)); |
3c9b8860 | 363 | |
015b097c | 364 | r = link_unsigned_attribute(device, "addr_assign_type", &addr_type); |
f1ac7002 | 365 | if (r < 0) |
015b097c ZJS |
366 | return r; |
367 | switch (addr_type) { | |
368 | case NET_ADDR_SET: | |
369 | return log_device_debug(device, "MAC on the device already set by userspace"); | |
370 | case NET_ADDR_STOLEN: | |
371 | return log_device_debug(device, "MAC on the device already set based on another device"); | |
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 | |
015b097c ZJS |
380 | if (want_random == (addr_type == NET_ADDR_RANDOM)) |
381 | return log_device_debug(device, "MAC on the device already matches policy *%s*", | |
54ed9f88 | 382 | mac_address_policy_to_string(policy)); |
16b9b87a | 383 | |
015b097c ZJS |
384 | if (want_random) { |
385 | log_device_debug(device, "Using random bytes to generate MAC"); | |
550c8784 LP |
386 | |
387 | /* We require genuine randomness here, since we want to make sure we won't collide with other | |
388 | * systems booting up at the very same time. We do allow RDRAND however, since this is not | |
389 | * cryptographic key material. */ | |
a745117d LP |
390 | r = genuine_random_bytes(mac->ether_addr_octet, ETH_ALEN, RANDOM_ALLOW_RDRAND); |
391 | if (r < 0) | |
392 | return log_device_error_errno(device, r, "Failed to acquire random data to generate MAC: %m"); | |
015b097c | 393 | } else { |
dbe81cbd | 394 | uint64_t result; |
9bf3b535 | 395 | |
96848152 ZJS |
396 | r = net_get_unique_predictable_data(device, |
397 | naming_scheme_has(NAMING_STABLE_VIRTUAL_MACS), | |
398 | &result); | |
16b9b87a | 399 | if (r < 0) |
015b097c | 400 | return log_device_warning_errno(device, r, "Could not generate persistent MAC: %m"); |
16b9b87a | 401 | |
96848152 | 402 | log_device_debug(device, "Using generated persistent MAC address"); |
9bf3b535 | 403 | assert_cc(ETH_ALEN <= sizeof(result)); |
dbe81cbd | 404 | memcpy(mac->ether_addr_octet, &result, ETH_ALEN); |
16b9b87a TG |
405 | } |
406 | ||
407 | /* see eth_random_addr in the kernel */ | |
3c9b8860 TG |
408 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ |
409 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
015b097c | 410 | return 1; |
16b9b87a TG |
411 | } |
412 | ||
2e17fed5 YW |
413 | static int link_config_apply_rtnl_settings(sd_netlink **rtnl, const link_config *config, sd_device *device) { |
414 | struct ether_addr generated_mac, *mac = NULL; | |
415 | int ifindex, r; | |
af6f0d42 | 416 | |
2e17fed5 | 417 | assert(rtnl); |
3e137a1b TG |
418 | assert(config); |
419 | assert(device); | |
3e137a1b | 420 | |
2e17fed5 | 421 | r = sd_device_get_ifindex(device, &ifindex); |
e5eadf53 | 422 | if (r < 0) |
2e17fed5 | 423 | return log_device_error_errno(device, r, "Could not find ifindex: %m"); |
af6f0d42 | 424 | |
2e17fed5 YW |
425 | if (IN_SET(config->mac_address_policy, MAC_ADDRESS_POLICY_PERSISTENT, MAC_ADDRESS_POLICY_RANDOM)) { |
426 | if (get_mac(device, config->mac_address_policy, &generated_mac) > 0) | |
427 | mac = &generated_mac; | |
428 | } else | |
429 | mac = config->mac; | |
af6f0d42 | 430 | |
2e17fed5 | 431 | r = rtnl_set_link_properties(rtnl, ifindex, config->alias, mac, config->mtu); |
50725d10 | 432 | if (r < 0) |
2e17fed5 | 433 | log_device_warning_errno(device, r, "Could not set Alias=, MACAddress= or MTU=, ignoring: %m"); |
50725d10 | 434 | |
2e17fed5 YW |
435 | return 0; |
436 | } | |
224ded67 | 437 | |
2e17fed5 YW |
438 | static int link_config_generate_new_name(const link_config_ctx *ctx, const link_config *config, sd_device *device, const char **ret_name) { |
439 | unsigned name_type = NET_NAME_UNKNOWN; | |
440 | const char *new_name = NULL; | |
441 | NamePolicy policy; | |
442 | int r; | |
a34811e4 | 443 | |
2e17fed5 YW |
444 | assert(ctx); |
445 | assert(config); | |
446 | assert(device); | |
447 | assert(ret_name); | |
43b3a5ef | 448 | |
015b097c | 449 | (void) link_unsigned_attribute(device, "name_assign_type", &name_type); |
0b189e8f | 450 | |
73d2bb08 ZJS |
451 | if (IN_SET(name_type, NET_NAME_USER, NET_NAME_RENAMED) |
452 | && !naming_scheme_has(NAMING_ALLOW_RERENAMES)) { | |
453 | log_device_debug(device, "Device already has a name given by userspace, not renaming."); | |
454 | goto no_rename; | |
455 | } | |
456 | ||
0b189e8f | 457 | if (ctx->enable_name_policy && config->name_policy) |
78f8849f | 458 | for (NamePolicy *p = config->name_policy; *p != _NAMEPOLICY_INVALID; p++) { |
0b189e8f ZJS |
459 | policy = *p; |
460 | ||
461 | switch (policy) { | |
462 | case NAMEPOLICY_KERNEL: | |
463 | if (name_type != NET_NAME_PREDICTABLE) | |
464 | continue; | |
465 | ||
466 | /* The kernel claims to have given a predictable name, keep it. */ | |
467 | log_device_debug(device, "Policy *%s*: keeping predictable kernel name", | |
468 | name_policy_to_string(policy)); | |
469 | goto no_rename; | |
3907446f ZJS |
470 | case NAMEPOLICY_KEEP: |
471 | if (!IN_SET(name_type, NET_NAME_USER, NET_NAME_RENAMED)) | |
472 | continue; | |
473 | ||
474 | log_device_debug(device, "Policy *%s*: keeping existing userspace name", | |
475 | name_policy_to_string(policy)); | |
476 | goto no_rename; | |
0b189e8f ZJS |
477 | case NAMEPOLICY_DATABASE: |
478 | (void) sd_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE", &new_name); | |
479 | break; | |
480 | case NAMEPOLICY_ONBOARD: | |
481 | (void) sd_device_get_property_value(device, "ID_NET_NAME_ONBOARD", &new_name); | |
482 | break; | |
483 | case NAMEPOLICY_SLOT: | |
484 | (void) sd_device_get_property_value(device, "ID_NET_NAME_SLOT", &new_name); | |
485 | break; | |
486 | case NAMEPOLICY_PATH: | |
487 | (void) sd_device_get_property_value(device, "ID_NET_NAME_PATH", &new_name); | |
488 | break; | |
489 | case NAMEPOLICY_MAC: | |
490 | (void) sd_device_get_property_value(device, "ID_NET_NAME_MAC", &new_name); | |
491 | break; | |
492 | default: | |
493 | assert_not_reached("invalid policy"); | |
5fde13d7 | 494 | } |
78f8849f YW |
495 | if (ifname_valid(new_name)) |
496 | break; | |
daeb71a3 | 497 | } |
daeb71a3 | 498 | |
2e17fed5 | 499 | if (new_name) { |
0b189e8f | 500 | log_device_debug(device, "Policy *%s* yields \"%s\".", name_policy_to_string(policy), new_name); |
2e17fed5 YW |
501 | *ret_name = new_name; |
502 | return 0; | |
503 | } | |
04b67d49 | 504 | |
2e17fed5 YW |
505 | if (config->name) { |
506 | log_device_debug(device, "Policies didn't yield a name, using specified Name=%s.", config->name); | |
507 | *ret_name = config->name; | |
508 | return 0; | |
509 | } | |
16b9b87a | 510 | |
2e17fed5 YW |
511 | log_device_debug(device, "Policies didn't yield a name and Name= is not given, not renaming."); |
512 | no_rename: | |
513 | r = sd_device_get_sysname(device, ret_name); | |
f647962d | 514 | if (r < 0) |
2e17fed5 YW |
515 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | static int link_config_apply_alternative_names(sd_netlink **rtnl, const link_config *config, sd_device *device, const char *new_name) { | |
521 | _cleanup_strv_free_ char **altnames = NULL, **current_altnames = NULL; | |
522 | const char *current_name; | |
523 | int ifindex, r; | |
524 | ||
525 | assert(rtnl); | |
526 | assert(config); | |
527 | assert(device); | |
528 | ||
529 | r = sd_device_get_sysname(device, ¤t_name); | |
530 | if (r < 0) | |
531 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); | |
532 | ||
533 | r = sd_device_get_ifindex(device, &ifindex); | |
534 | if (r < 0) | |
535 | return log_device_error_errno(device, r, "Could not find ifindex: %m"); | |
43b3a5ef | 536 | |
ef1d2c07 YW |
537 | if (config->alternative_names) { |
538 | altnames = strv_copy(config->alternative_names); | |
539 | if (!altnames) | |
540 | return log_oom(); | |
541 | } | |
542 | ||
543 | if (config->alternative_names_policy) | |
544 | for (NamePolicy *p = config->alternative_names_policy; *p != _NAMEPOLICY_INVALID; p++) { | |
61fd7d67 | 545 | const char *n = NULL; |
ef1d2c07 YW |
546 | |
547 | switch (*p) { | |
548 | case NAMEPOLICY_DATABASE: | |
549 | (void) sd_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE", &n); | |
550 | break; | |
551 | case NAMEPOLICY_ONBOARD: | |
552 | (void) sd_device_get_property_value(device, "ID_NET_NAME_ONBOARD", &n); | |
553 | break; | |
554 | case NAMEPOLICY_SLOT: | |
555 | (void) sd_device_get_property_value(device, "ID_NET_NAME_SLOT", &n); | |
556 | break; | |
557 | case NAMEPOLICY_PATH: | |
558 | (void) sd_device_get_property_value(device, "ID_NET_NAME_PATH", &n); | |
559 | break; | |
560 | case NAMEPOLICY_MAC: | |
561 | (void) sd_device_get_property_value(device, "ID_NET_NAME_MAC", &n); | |
562 | break; | |
563 | default: | |
564 | assert_not_reached("invalid policy"); | |
565 | } | |
566 | if (!isempty(n)) { | |
567 | r = strv_extend(&altnames, n); | |
568 | if (r < 0) | |
569 | return log_oom(); | |
570 | } | |
571 | } | |
572 | ||
573 | if (new_name) | |
574 | strv_remove(altnames, new_name); | |
2e17fed5 | 575 | strv_remove(altnames, current_name); |
97fdae33 | 576 | |
2e17fed5 | 577 | r = rtnl_get_link_alternative_names(rtnl, ifindex, ¤t_altnames); |
97fdae33 | 578 | if (r < 0) |
2e17fed5 | 579 | log_device_debug_errno(device, r, "Failed to get alternative names, ignoring: %m"); |
97fdae33 YW |
580 | |
581 | char **p; | |
582 | STRV_FOREACH(p, current_altnames) | |
583 | strv_remove(altnames, *p); | |
584 | ||
ef1d2c07 | 585 | strv_uniq(altnames); |
4d016e96 | 586 | strv_sort(altnames); |
2e17fed5 YW |
587 | r = rtnl_set_link_alternative_names(rtnl, ifindex, altnames); |
588 | if (r < 0) | |
589 | log_device_full_errno(device, r == -EOPNOTSUPP ? LOG_DEBUG : LOG_WARNING, r, | |
590 | "Could not set AlternativeName= or apply AlternativeNamesPolicy=, ignoring: %m"); | |
591 | ||
592 | return 0; | |
593 | } | |
a5053a15 | 594 | |
2e17fed5 YW |
595 | int link_config_apply(link_config_ctx *ctx, const link_config *config, sd_device *device, const char **ret_name) { |
596 | const char *new_name; | |
e0e789c1 | 597 | DeviceAction a; |
2e17fed5 YW |
598 | int r; |
599 | ||
600 | assert(ctx); | |
601 | assert(config); | |
602 | assert(device); | |
603 | assert(ret_name); | |
604 | ||
e0e789c1 YW |
605 | r = device_get_action(device, &a); |
606 | if (r < 0) | |
607 | return log_device_error_errno(device, r, "Failed to get ACTION= property: %m"); | |
608 | ||
609 | if (!IN_SET(a, DEVICE_ACTION_ADD, DEVICE_ACTION_BIND, DEVICE_ACTION_MOVE)) { | |
610 | log_device_debug(device, "Skipping to apply .link settings on '%s' uevent.", device_action_to_string(a)); | |
611 | ||
612 | r = sd_device_get_sysname(device, ret_name); | |
613 | if (r < 0) | |
614 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
2e17fed5 YW |
619 | r = link_config_apply_ethtool_settings(&ctx->ethtool_fd, config, device); |
620 | if (r < 0) | |
621 | return r; | |
622 | ||
623 | r = link_config_apply_rtnl_settings(&ctx->rtnl, config, device); | |
624 | if (r < 0) | |
625 | return r; | |
626 | ||
e0e789c1 YW |
627 | if (a == DEVICE_ACTION_MOVE) { |
628 | log_device_debug(device, "Skipping to apply Name= and NamePolicy= on '%s' uevent.", device_action_to_string(a)); | |
629 | ||
630 | r = sd_device_get_sysname(device, &new_name); | |
631 | if (r < 0) | |
632 | return log_device_error_errno(device, r, "Failed to get sysname: %m"); | |
633 | } else { | |
634 | r = link_config_generate_new_name(ctx, config, device, &new_name); | |
635 | if (r < 0) | |
636 | return r; | |
637 | } | |
2e17fed5 YW |
638 | |
639 | r = link_config_apply_alternative_names(&ctx->rtnl, config, device, new_name); | |
640 | if (r < 0) | |
641 | return r; | |
d95b83b8 | 642 | |
2e17fed5 | 643 | *ret_name = new_name; |
af6f0d42 TG |
644 | return 0; |
645 | } | |
be32eb9b | 646 | |
e5eadf53 | 647 | int link_get_driver(link_config_ctx *ctx, sd_device *device, char **ret) { |
847a8a5f | 648 | const char *name; |
a7f7d1bd | 649 | char *driver = NULL; |
847a8a5f TG |
650 | int r; |
651 | ||
e5eadf53 YW |
652 | r = sd_device_get_sysname(device, &name); |
653 | if (r < 0) | |
654 | return r; | |
847a8a5f | 655 | |
aedca892 | 656 | r = ethtool_get_driver(&ctx->ethtool_fd, name, &driver); |
847a8a5f TG |
657 | if (r < 0) |
658 | return r; | |
659 | ||
660 | *ret = driver; | |
661 | return 0; | |
662 | } | |
663 | ||
54ed9f88 ZJS |
664 | static const char* const mac_address_policy_table[_MAC_ADDRESS_POLICY_MAX] = { |
665 | [MAC_ADDRESS_POLICY_PERSISTENT] = "persistent", | |
666 | [MAC_ADDRESS_POLICY_RANDOM] = "random", | |
667 | [MAC_ADDRESS_POLICY_NONE] = "none", | |
be32eb9b TG |
668 | }; |
669 | ||
54ed9f88 | 670 | DEFINE_STRING_TABLE_LOOKUP(mac_address_policy, MACAddressPolicy); |
d03cb6b8 YW |
671 | DEFINE_CONFIG_PARSE_ENUM_WITH_DEFAULT( |
672 | config_parse_mac_address_policy, | |
673 | mac_address_policy, | |
674 | MACAddressPolicy, | |
675 | MAC_ADDRESS_POLICY_NONE, | |
676 | "Failed to parse MAC address policy"); | |
be32eb9b | 677 | |
2c5859af | 678 | static const char* const name_policy_table[_NAMEPOLICY_MAX] = { |
04b67d49 | 679 | [NAMEPOLICY_KERNEL] = "kernel", |
3907446f | 680 | [NAMEPOLICY_KEEP] = "keep", |
e51660ae | 681 | [NAMEPOLICY_DATABASE] = "database", |
be32eb9b TG |
682 | [NAMEPOLICY_ONBOARD] = "onboard", |
683 | [NAMEPOLICY_SLOT] = "slot", | |
684 | [NAMEPOLICY_PATH] = "path", | |
3907446f | 685 | [NAMEPOLICY_MAC] = "mac", |
be32eb9b TG |
686 | }; |
687 | ||
688 | DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy); | |
464cf22f TG |
689 | DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy, |
690 | _NAMEPOLICY_INVALID, | |
691 | "Failed to parse interface name policy"); | |
ef1d2c07 YW |
692 | |
693 | static const char* const alternative_names_policy_table[_NAMEPOLICY_MAX] = { | |
694 | [NAMEPOLICY_DATABASE] = "database", | |
695 | [NAMEPOLICY_ONBOARD] = "onboard", | |
696 | [NAMEPOLICY_SLOT] = "slot", | |
697 | [NAMEPOLICY_PATH] = "path", | |
698 | [NAMEPOLICY_MAC] = "mac", | |
699 | }; | |
700 | ||
701 | DEFINE_STRING_TABLE_LOOKUP(alternative_names_policy, NamePolicy); | |
702 | DEFINE_CONFIG_PARSE_ENUMV(config_parse_alternative_names_policy, alternative_names_policy, NamePolicy, | |
703 | _NAMEPOLICY_INVALID, | |
704 | "Failed to parse alternative names policy"); |