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-rw-r--r--src/udev/net/link-config.c54
-rw-r--r--src/udev/net/link-config.h1
2 files changed, 45 insertions, 10 deletions
diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
index 946715ce5..b44aeaf6d 100644
--- a/src/udev/net/link-config.c
+++ b/src/udev/net/link-config.c
@@ -20,10 +20,11 @@
***/
#include <netinet/ether.h>
-#include <net/if.h>
+#include <linux/netdevice.h>
#include "sd-id128.h"
+#include "missing.h"
#include "link-config.h"
#include "ethtool-util.h"
@@ -283,8 +284,33 @@ static bool mac_is_random(struct udev_device *device) {
if (r < 0)
return false;
- /* check for NET_ADDR_RANDOM */
- return type == 1;
+ return type == NET_ADDR_RANDOM;
+}
+
+static bool should_rename(struct udev_device *device, bool respect_predictable) {
+ const char *s;
+ unsigned type;
+ int r;
+
+ s = udev_device_get_sysattr_value(device, "name_assign_type");
+ if (!s)
+ return true; /* if we don't know, assume we should rename */
+ r = safe_atou(s, &type);
+ if (r < 0)
+ return true;
+
+ switch (type) {
+ case NET_NAME_USER:
+ case NET_NAME_RENAMED:
+ return false; /* these were already named by userspace, do not touch again */
+ case NET_NAME_PREDICTABLE:
+ if (respect_predictable)
+ return false; /* the kernel claims to have given a predictable name */
+ /* fall through */
+ case NET_NAME_ENUM:
+ default:
+ return true; /* the name is known to be bad, or of an unknown type */
+ }
}
static int get_mac(struct udev_device *device, bool want_random, struct ether_addr *mac) {
@@ -315,6 +341,7 @@ int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_dev
const char *new_name = NULL;
struct ether_addr generated_mac;
struct ether_addr *mac = NULL;
+ bool respect_predictable = false;
int r, ifindex;
assert(ctx);
@@ -350,8 +377,12 @@ int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_dev
if (ctx->enable_name_policy && config->name_policy) {
NamePolicy *policy;
- for (policy = config->name_policy; !new_name && *policy != _NAMEPOLICY_INVALID; policy++) {
+ for (policy = config->name_policy; !respect_predictable && !new_name &&
+ *policy != _NAMEPOLICY_INVALID; policy++) {
switch (*policy) {
+ case NAMEPOLICY_KERNEL:
+ respect_predictable = true;
+ break;
case NAMEPOLICY_DATABASE:
new_name = udev_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE");
break;
@@ -373,12 +404,14 @@ int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_dev
}
}
- if (new_name)
- *name = new_name; /* a name was set by a policy */
- else if (config->name)
- *name = config->name; /* a name was set manually in the config */
- else
- *name = NULL;
+ if (should_rename(device, respect_predictable)) {
+ if (!new_name)
+ /* if not set by policy, fall back manually set name */
+ new_name = config->name;
+ } else
+ new_name = NULL;
+
+ *name = new_name;
switch (config->mac_policy) {
case MACPOLICY_PERSISTENT:
@@ -444,6 +477,7 @@ DEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);
DEFINE_CONFIG_PARSE_ENUM(config_parse_mac_policy, mac_policy, MACPolicy, "Failed to parse MAC address policy");
static const char* const name_policy_table[_NAMEPOLICY_MAX] = {
+ [NAMEPOLICY_KERNEL] = "kernel",
[NAMEPOLICY_DATABASE] = "database",
[NAMEPOLICY_ONBOARD] = "onboard",
[NAMEPOLICY_SLOT] = "slot",
diff --git a/src/udev/net/link-config.h b/src/udev/net/link-config.h
index 24fdb87e4..5f3d4ad14 100644
--- a/src/udev/net/link-config.h
+++ b/src/udev/net/link-config.h
@@ -39,6 +39,7 @@ typedef enum MACPolicy {
} MACPolicy;
typedef enum NamePolicy {
+ NAMEPOLICY_KERNEL,
NAMEPOLICY_DATABASE,
NAMEPOLICY_ONBOARD,
NAMEPOLICY_SLOT,