#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 "naming-scheme.h"
#include "netlink-util.h"
#include "network-internal.h"
#include "parse-util.h"
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->match_host);
+ condition_free_list(link->match_virt);
+ condition_free_list(link->match_kernel_cmdline);
+ condition_free_list(link->match_kernel_version);
+ condition_free_list(link->match_arch);
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_policy = _MACPOLICY_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 (!net_match_config(NULL, NULL, NULL, NULL, NULL,
+ link->match_host, link->match_virt, link->match_kernel_cmdline,
+ link->match_kernel_version, link->match_arch,
+ NULL, NULL, NULL, NULL, NULL)) {
+ log_debug("%s: Conditions do not match the system environment, skipping.", filename);
+ return 0;
+ }
+
+ log_debug("Parsed configuration file %s", filename);
LIST_PREPEND(links, ctx->links, link);
link = NULL;
return proc_cmdline_get_bool("net.ifnames", &b) <= 0 || b;
}
+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, attr, &s);
+ if (r < 0)
+ 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 %s \"%s\": %m", attr, s);
+
+ log_device_debug(device, "Device has %s=%u", attr, *type);
+ return 0;
+}
+
int link_config_load(link_config_ctx *ctx) {
_cleanup_strv_free_ char **files;
char **f;
}
/* 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);
link->match_kernel_version, link->match_arch,
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'",
- link->filename, sysname);
+ link->filename, sysname);
*ret = link;
return 0;
} else if (name_assign_type == NET_NAME_RENAMED) {
log_warning("Config file %s matches device based on renamed interface name '%s', ignoring",
- link->filename, sysname);
+ link->filename, sysname);
continue;
}
link->filename, sysname);
*ret = link;
-
return 0;
}
}
*ret = NULL;
-
return -ENOENT;
}
-static bool mac_is_random(sd_device *device) {
- const char *s;
- unsigned type;
- 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;
-
- r = safe_atou(s, &type);
- if (r < 0)
- return false;
-
- return type == NET_ADDR_RANDOM;
-}
-
-static bool should_rename(sd_device *device, bool respect_predictable) {
- const char *s;
- unsigned type;
+static int get_mac(sd_device *device, MACPolicy policy, struct ether_addr *mac) {
+ unsigned addr_type;
+ bool want_random = policy == MACPOLICY_RANDOM;
int r;
- /* if we can't get the assgin type, assume we should rename */
- if (sd_device_get_sysattr_value(device, "name_assign_type", &s) < 0)
- return true;
+ assert(IN_SET(policy, MACPOLICY_RANDOM, MACPOLICY_PERSISTENT));
- r = safe_atou(s, &type);
+ r = link_unsigned_attribute(device, "addr_assign_type", &addr_type);
if (r < 0)
- return true;
-
- switch (type) {
- case NET_NAME_PREDICTABLE:
- /* the kernel claims to have given a predictable name */
- if (respect_predictable)
- return false;
- _fallthrough_;
+ 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:
- /* the name is known to be bad, or of an unknown type */
- return true;
+ 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_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,
sd_device *device, const char **name) {
- bool respect_predictable = false;
struct ether_addr generated_mac;
struct ether_addr *mac = NULL;
const char *new_name = NULL;
const char *old_name;
- unsigned speed;
+ unsigned speed, name_type = NET_NAME_UNKNOWN;
+ NamePolicy policy;
int r, ifindex;
assert(ctx);
if (r < 0)
return log_device_warning_errno(device, r, "Could not find ifindex: %m");
- if (ctx->enable_name_policy && config->name_policy) {
- NamePolicy *policy;
-
- for (policy = config->name_policy;
- !new_name && *policy != _NAMEPOLICY_INVALID; policy++) {
- switch (*policy) {
- case NAMEPOLICY_KERNEL:
- respect_predictable = true;
- break;
- case NAMEPOLICY_DATABASE:
- (void) sd_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE", &new_name);
- break;
- case NAMEPOLICY_ONBOARD:
- (void) sd_device_get_property_value(device, "ID_NET_NAME_ONBOARD", &new_name);
- break;
- case NAMEPOLICY_SLOT:
- (void) sd_device_get_property_value(device, "ID_NET_NAME_SLOT", &new_name);
- break;
- case NAMEPOLICY_PATH:
- (void) sd_device_get_property_value(device, "ID_NET_NAME_PATH", &new_name);
- break;
- case NAMEPOLICY_MAC:
- (void) sd_device_get_property_value(device, "ID_NET_NAME_MAC", &new_name);
- break;
- default:
- break;
+
+ (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, "Device already has a name given by userspace, not renaming.");
+ goto no_rename;
+ }
+
+ if (ctx->enable_name_policy && config->name_policy)
+ for (NamePolicy *p = config->name_policy; !new_name && *p != _NAMEPOLICY_INVALID; p++) {
+ policy = *p;
+
+ switch (policy) {
+ case NAMEPOLICY_KERNEL:
+ if (name_type != NET_NAME_PREDICTABLE)
+ continue;
+
+ /* The kernel claims to have given a predictable name, keep it. */
+ log_device_debug(device, "Policy *%s*: keeping predictable kernel name",
+ name_policy_to_string(policy));
+ goto no_rename;
+ case NAMEPOLICY_KEEP:
+ if (!IN_SET(name_type, NET_NAME_USER, NET_NAME_RENAMED))
+ continue;
+
+ log_device_debug(device, "Policy *%s*: keeping existing userspace name",
+ name_policy_to_string(policy));
+ goto no_rename;
+ case NAMEPOLICY_DATABASE:
+ (void) sd_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE", &new_name);
+ break;
+ case NAMEPOLICY_ONBOARD:
+ (void) sd_device_get_property_value(device, "ID_NET_NAME_ONBOARD", &new_name);
+ break;
+ case NAMEPOLICY_SLOT:
+ (void) sd_device_get_property_value(device, "ID_NET_NAME_SLOT", &new_name);
+ break;
+ case NAMEPOLICY_PATH:
+ (void) sd_device_get_property_value(device, "ID_NET_NAME_PATH", &new_name);
+ break;
+ case NAMEPOLICY_MAC:
+ (void) sd_device_get_property_value(device, "ID_NET_NAME_MAC", &new_name);
+ break;
+ default:
+ assert_not_reached("invalid policy");
}
}
- }
- if (!new_name && should_rename(device, respect_predictable))
+ if (new_name)
+ log_device_debug(device, "Policy *%s* yields \"%s\".", name_policy_to_string(policy), new_name);
+ else if (config->name) {
new_name = config->name;
+ log_device_debug(device, "Policies didn't yield a name, using specified Name=%s.", new_name);
+ } else
+ 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_policy, MACPOLICY_PERSISTENT, MACPOLICY_RANDOM)) {
+ if (get_mac(device, config->mac_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)
static const char* const mac_policy_table[_MACPOLICY_MAX] = {
[MACPOLICY_PERSISTENT] = "persistent",
[MACPOLICY_RANDOM] = "random",
- [MACPOLICY_NONE] = "none"
+ [MACPOLICY_NONE] = "none",
};
DEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);
static const char* const name_policy_table[_NAMEPOLICY_MAX] = {
[NAMEPOLICY_KERNEL] = "kernel",
+ [NAMEPOLICY_KEEP] = "keep",
[NAMEPOLICY_DATABASE] = "database",
[NAMEPOLICY_ONBOARD] = "onboard",
[NAMEPOLICY_SLOT] = "slot",
[NAMEPOLICY_PATH] = "path",
- [NAMEPOLICY_MAC] = "mac"
+ [NAMEPOLICY_MAC] = "mac",
};
DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);
projects / thirdparty / systemd.git / blobdiff