/* SPDX-License-Identifier: LGPL-2.1+ */
+#include <linux/netdevice.h>
#include <netinet/ether.h>
#include "sd-device.h"
#include "alloc-util.h"
#include "conf-files.h"
#include "conf-parser.h"
+#include "def.h"
#include "device-util.h"
#include "ethtool-util.h"
#include "fd-util.h"
#include "link-config.h"
#include "log.h"
-#include "missing_network.h"
+#include "memory-util.h"
#include "naming-scheme.h"
#include "netlink-util.h"
#include "network-internal.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
-#include "util.h"
struct link_config_ctx {
LIST_HEAD(link_config, links);
sd_netlink *rtnl;
- usec_t link_dirs_ts_usec;
+ usec_t network_dirs_ts_usec;
};
-static const char* const link_dirs[] = {
- "/etc/systemd/network",
- "/run/systemd/network",
- "/usr/lib/systemd/network",
-#if HAVE_SPLIT_USR
- "/lib/systemd/network",
-#endif
- NULL};
-
static void link_config_free(link_config *link) {
if (!link)
return;
strv_free(link->match_path);
strv_free(link->match_driver);
strv_free(link->match_type);
- free(link->match_name);
- free(link->match_host);
- free(link->match_virt);
- free(link->match_kernel_cmdline);
- free(link->match_kernel_version);
- free(link->match_arch);
+ strv_free(link->match_name);
+ condition_free_list(link->conditions);
free(link->description);
free(link->mac);
return;
}
-DEFINE_TRIVIAL_CLEANUP_FUNC(link_config_ctx*, link_config_ctx_free);
-
int link_config_ctx_new(link_config_ctx **ret) {
_cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL;
return 0;
}
-static int load_link(link_config_ctx *ctx, const char *filename) {
+int link_load_one(link_config_ctx *ctx, const char *filename) {
_cleanup_(link_config_freep) link_config *link = NULL;
_cleanup_fclose_ FILE *file = NULL;
- int i;
+ _cleanup_free_ char *name = NULL;
+ size_t i;
int r;
assert(ctx);
assert(filename);
file = fopen(filename, "re");
- if (!file) {
- if (errno == ENOENT)
- return 0;
- else
- return -errno;
- }
+ if (!file)
+ return errno == ENOENT ? 0 : -errno;
if (null_or_empty_fd(fileno(file))) {
log_debug("Skipping empty file: %s", filename);
return 0;
}
- link = new0(link_config, 1);
+ name = strdup(filename);
+ if (!name)
+ return -ENOMEM;
+
+ link = new(link_config, 1);
if (!link)
- return log_oom();
+ return -ENOMEM;
- link->mac_policy = _MACPOLICY_INVALID;
- link->wol = _WOL_INVALID;
- link->duplex = _DUP_INVALID;
- link->port = _NET_DEV_PORT_INVALID;
- link->autonegotiation = -1;
+ *link = (link_config) {
+ .filename = TAKE_PTR(name),
+ .mac_address_policy = _MAC_ADDRESS_POLICY_INVALID,
+ .wol = _WOL_INVALID,
+ .duplex = _DUP_INVALID,
+ .port = _NET_DEV_PORT_INVALID,
+ .autonegotiation = -1,
+ };
- for (i = 0; i < (int)ELEMENTSOF(link->features); i++)
+ for (i = 0; i < ELEMENTSOF(link->features); i++)
link->features[i] = -1;
r = config_parse(NULL, filename, file,
- "Match\0Link\0Ethernet\0",
+ "Match\0Link\0",
config_item_perf_lookup, link_config_gperf_lookup,
CONFIG_PARSE_WARN, link);
if (r < 0)
return r;
- else
- log_debug("Parsed configuration file %s", filename);
if (link->speed > UINT_MAX)
return -ERANGE;
- link->filename = strdup(filename);
- if (!link->filename)
- return log_oom();
+ if (!condition_test_list(link->conditions, NULL, NULL, NULL)) {
+ log_debug("%s: Conditions do not match the system environment, skipping.", filename);
+ return 0;
+ }
- LIST_PREPEND(links, ctx->links, link);
- link = NULL;
+ log_debug("Parsed configuration file %s", filename);
+ LIST_PREPEND(links, ctx->links, TAKE_PTR(link));
return 0;
}
return proc_cmdline_get_bool("net.ifnames", &b) <= 0 || b;
}
-static int link_name_type(sd_device *device, unsigned *type) {
+static int link_unsigned_attribute(sd_device *device, const char *attr, unsigned *type) {
const char *s;
int r;
- r = sd_device_get_sysattr_value(device, "name_assign_type", &s);
+ r = sd_device_get_sysattr_value(device, attr, &s);
if (r < 0)
- return log_device_debug_errno(device, r, "Failed to query name_assign_type: %m");
+ return log_device_debug_errno(device, r, "Failed to query %s: %m", attr);
r = safe_atou(s, type);
if (r < 0)
- return log_device_warning_errno(device, r, "Failed to parse name_assign_type \"%s\": %m", s);
+ return log_device_warning_errno(device, r, "Failed to parse %s \"%s\": %m", attr, s);
- log_device_debug(device, "Device has name_assign_type=%d", *type);
+ log_device_debug(device, "Device has %s=%u", attr, *type);
return 0;
}
}
/* update timestamp */
- paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, true);
+ paths_check_timestamp(NETWORK_DIRS, &ctx->network_dirs_ts_usec, true);
- r = conf_files_list_strv(&files, ".link", NULL, 0, link_dirs);
+ r = conf_files_list_strv(&files, ".link", NULL, 0, NETWORK_DIRS);
if (r < 0)
return log_error_errno(r, "failed to enumerate link files: %m");
STRV_FOREACH_BACKWARDS(f, files) {
- r = load_link(ctx, *f);
+ r = link_load_one(ctx, *f);
if (r < 0)
- return r;
+ log_error_errno(r, "Failed to load %s, ignoring: %m", *f);
}
return 0;
}
bool link_config_should_reload(link_config_ctx *ctx) {
- return paths_check_timestamp(link_dirs, &ctx->link_dirs_ts_usec, false);
+ return paths_check_timestamp(NETWORK_DIRS, &ctx->network_dirs_ts_usec, false);
}
int link_config_get(link_config_ctx *ctx, sd_device *device, link_config **ret) {
assert(ret);
LIST_FOREACH(links, link, ctx->links) {
- const char *address = NULL, *id_path = NULL, *parent_driver = NULL, *id_net_driver = NULL, *devtype = NULL, *sysname = NULL;
- sd_device *parent;
+ const char *address = NULL, *id_path = NULL, *id_net_driver = NULL, *devtype = NULL, *sysname = NULL;
(void) sd_device_get_sysattr_value(device, "address", &address);
(void) sd_device_get_property_value(device, "ID_PATH", &id_path);
- if (sd_device_get_parent(device, &parent) >= 0)
- (void) sd_device_get_driver(parent, &parent_driver);
(void) sd_device_get_property_value(device, "ID_NET_DRIVER", &id_net_driver);
(void) sd_device_get_devtype(device, &devtype);
(void) sd_device_get_sysname(device, &sysname);
if (net_match_config(link->match_mac, link->match_path, link->match_driver,
- link->match_type, link->match_name, link->match_host,
- link->match_virt, link->match_kernel_cmdline,
- link->match_kernel_version, link->match_arch,
+ link->match_type, link->match_name,
address ? ether_aton(address) : NULL,
id_path,
- parent_driver,
id_net_driver,
devtype,
sysname)) {
if (link->match_name) {
- unsigned char name_assign_type = NET_NAME_UNKNOWN;
- const char *attr_value;
+ unsigned name_assign_type = NET_NAME_UNKNOWN;
- if (sd_device_get_sysattr_value(device, "name_assign_type", &attr_value) >= 0)
- (void) safe_atou8(attr_value, &name_assign_type);
+ (void) link_unsigned_attribute(device, "name_assign_type", &name_assign_type);
if (name_assign_type == NET_NAME_ENUM) {
log_warning("Config file %s applies to device based on potentially unpredictable interface name '%s'",
return -ENOENT;
}
-static bool mac_is_random(sd_device *device) {
- const char *s;
- unsigned type;
+static int get_mac(sd_device *device, MACAddressPolicy policy, struct ether_addr *mac) {
+ unsigned addr_type;
+ bool want_random = policy == MAC_ADDRESS_POLICY_RANDOM;
int r;
- /* if we can't get the assign type, assume it is not random */
- if (sd_device_get_sysattr_value(device, "addr_assign_type", &s) < 0)
- return false;
+ assert(IN_SET(policy, MAC_ADDRESS_POLICY_RANDOM, MAC_ADDRESS_POLICY_PERSISTENT));
- r = safe_atou(s, &type);
+ r = link_unsigned_attribute(device, "addr_assign_type", &addr_type);
if (r < 0)
- return false;
-
- return type == NET_ADDR_RANDOM;
-}
+ return r;
+ switch (addr_type) {
+ case NET_ADDR_SET:
+ return log_device_debug(device, "MAC on the device already set by userspace");
+ case NET_ADDR_STOLEN:
+ return log_device_debug(device, "MAC on the device already set based on another device");
+ case NET_ADDR_RANDOM:
+ case NET_ADDR_PERM:
+ break;
+ default:
+ return log_device_warning(device, "Unknown addr_assign_type %u, ignoring", addr_type);
+ }
-static int get_mac(sd_device *device, bool want_random,
- struct ether_addr *mac) {
- int r;
+ if (want_random == (addr_type == NET_ADDR_RANDOM))
+ return log_device_debug(device, "MAC on the device already matches policy *%s*",
+ mac_address_policy_to_string(policy));
- if (want_random)
+ if (want_random) {
+ log_device_debug(device, "Using random bytes to generate MAC");
random_bytes(mac->ether_addr_octet, ETH_ALEN);
- else {
+ } else {
uint64_t result;
r = net_get_unique_predictable_data(device, &result);
if (r < 0)
- return r;
+ return log_device_warning_errno(device, r, "Could not generate persistent MAC: %m");
assert_cc(ETH_ALEN <= sizeof(result));
memcpy(mac->ether_addr_octet, &result, ETH_ALEN);
/* see eth_random_addr in the kernel */
mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */
mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */
-
- return 0;
+ return 1;
}
int link_config_apply(link_config_ctx *ctx, link_config *config,
return log_device_warning_errno(device, r, "Could not find ifindex: %m");
- (void) link_name_type(device, &name_type);
+ (void) link_unsigned_attribute(device, "name_assign_type", &name_type);
if (IN_SET(name_type, NET_NAME_USER, NET_NAME_RENAMED)
&& !naming_scheme_has(NAMING_ALLOW_RERENAMES)) {
log_device_debug(device, "Policies didn't yield a name and Name= is not given, not renaming.");
no_rename:
- switch (config->mac_policy) {
- case MACPOLICY_PERSISTENT:
- if (mac_is_random(device)) {
- r = get_mac(device, false, &generated_mac);
- if (r == -ENOENT) {
- log_warning_errno(r, "Could not generate persistent MAC address for %s: %m", old_name);
- break;
- } else if (r < 0)
- return r;
- mac = &generated_mac;
- }
- break;
- case MACPOLICY_RANDOM:
- if (!mac_is_random(device)) {
- r = get_mac(device, true, &generated_mac);
- if (r == -ENOENT) {
- log_warning_errno(r, "Could not generate random MAC address for %s: %m", old_name);
- break;
- } else if (r < 0)
- return r;
- mac = &generated_mac;
- }
- break;
- case MACPOLICY_NONE:
- default:
- mac = config->mac;
- }
+ if (IN_SET(config->mac_address_policy, MAC_ADDRESS_POLICY_PERSISTENT, MAC_ADDRESS_POLICY_RANDOM)) {
+ if (get_mac(device, config->mac_address_policy, &generated_mac) > 0)
+ mac = &generated_mac;
+ } else
+ mac = config->mac;
r = rtnl_set_link_properties(&ctx->rtnl, ifindex, config->alias, mac, config->mtu);
if (r < 0)
return 0;
}
-static const char* const mac_policy_table[_MACPOLICY_MAX] = {
- [MACPOLICY_PERSISTENT] = "persistent",
- [MACPOLICY_RANDOM] = "random",
- [MACPOLICY_NONE] = "none",
+static const char* const mac_address_policy_table[_MAC_ADDRESS_POLICY_MAX] = {
+ [MAC_ADDRESS_POLICY_PERSISTENT] = "persistent",
+ [MAC_ADDRESS_POLICY_RANDOM] = "random",
+ [MAC_ADDRESS_POLICY_NONE] = "none",
};
-DEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);
-DEFINE_CONFIG_PARSE_ENUM(config_parse_mac_policy, mac_policy, MACPolicy,
+DEFINE_STRING_TABLE_LOOKUP(mac_address_policy, MACAddressPolicy);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_mac_address_policy, mac_address_policy, MACAddressPolicy,
"Failed to parse MAC address policy");
static const char* const name_policy_table[_NAMEPOLICY_MAX] = {
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