networkd: netdev - log when loading a .netdev file

[elogind.git] / src / network / networkd-netdev.c

diff --git a/src/network/networkd-netdev.c b/src/network/networkd-netdev.c
index 075a8790a091f442f6ad6a65ec946d3f3a5beaca..a8a629bd1ff2519575bf39603db325c828e75735 100644 (file)
--- a/src/network/networkd-netdev.c
+++ b/src/network/networkd-netdev.c
@@ -25,7 +25,6 @@
 #include "conf-files.h"
 #include "conf-parser.h"
 #include "list.h"
-#include "siphash24.h"
 
 #define VLANID_MAX 4094
 
@@ -181,48 +180,8 @@ static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userda
         return 1;
 }
 
-#define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48)
-
-static int netdev_get_mac(NetDev *netdev, struct ether_addr *mac) {
-        uint8_t result[8];
-        size_t l, sz;
-        uint8_t *v;
-        int r;
-
-        assert(netdev);
-        assert(netdev->name);
-        assert(mac);
-
-        l = strlen(netdev->name);
-        sz = sizeof(sd_id128_t) + l;
-        v = alloca(sz);
-
-        /* fetch some persistent data unique to the machine */
-        r = sd_id128_get_machine((sd_id128_t*) v);
-        if (r < 0)
-                return r;
-
-        /* combine with some data unique (on this machine) to this
-         * netdev */
-        memcpy(v + sizeof(sd_id128_t), netdev->name, l);
-
-        /* Let's hash the host machine ID plus the container name. We
-         * use a fixed, but originally randomly created hash key here. */
-        siphash24(result, v, sz, HASH_KEY.bytes);
-
-        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;
-}
-
 static int netdev_create(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
         _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
-        struct ether_addr mac;
         const char *kind;
         int r;
 
@@ -233,12 +192,6 @@ static int netdev_create(NetDev *netdev, Link *link, sd_rtnl_message_handler_t c
         assert(netdev->manager);
         assert(netdev->manager->rtnl);
 
-        r = netdev_get_mac(netdev, &mac);
-        if (r < 0) {
-                log_error("Failed to generate predictable MAC address for %s", netdev->name);
-                return r;
-        }
-
         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, 0);
         if (r < 0) {
                 log_error_netdev(netdev,
@@ -265,14 +218,6 @@ static int netdev_create(NetDev *netdev, Link *link, sd_rtnl_message_handler_t c
                 return r;
         }
 
-        r = sd_rtnl_message_append_ether_addr(req, IFLA_ADDRESS, &mac);
-        if (r < 0) {
-                log_error_netdev(netdev,
-                                 "Colud not append IFLA_ADDRESS attribute: %s",
-                                 strerror(-r));
-                return r;
-        }
-
         r = sd_rtnl_message_open_container(req, IFLA_LINKINFO);
         if (r < 0) {
                 log_error_netdev(netdev,
@@ -375,6 +320,7 @@ int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) {
         uint16_t type;
         const char *kind;
         char *received_kind;
+        char *received_name;
         int r, ifindex;
 
         assert(netdev);
@@ -391,6 +337,42 @@ int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) {
                 return -EINVAL;
         }
 
+        r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+        if (r < 0) {
+                log_error_netdev(netdev, "Could not get ifindex: %s", strerror(-r));
+                netdev_enter_failed(netdev);
+                return r;
+        } else if (ifindex <= 0) {
+                log_error_netdev(netdev, "Got invalid ifindex: %d", ifindex);
+                netdev_enter_failed(netdev);
+                return r;
+        }
+
+
+        if (netdev->ifindex > 0) {
+                if (netdev->ifindex != ifindex) {
+                        log_error_netdev(netdev, "Could not set ifindex to %d, already set to %d",
+                                         ifindex, netdev->ifindex);
+                        netdev_enter_failed(netdev);
+                        return -EEXIST;
+                } else
+                        /* ifindex already set to the same for this netdev */
+                        return 0;
+        }
+
+        r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &received_name);
+        if (r < 0) {
+                log_error_netdev(netdev, "Could not get IFNAME");
+                return r;
+        }
+
+        if (!streq(netdev->name, received_name)) {
+                log_error_netdev(netdev, "Received newlink with wrong IFNAME %s",
+                                 received_name);
+                netdev_enter_failed(netdev);
+                return r;
+        }
+
         r = sd_rtnl_message_enter_container(message, IFLA_LINKINFO);
         if (r < 0) {
                 log_error_netdev(netdev, "Could not get LINKINFO");
@@ -417,27 +399,10 @@ int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) {
         }
 
         if (!streq(kind, received_kind)) {
-                log_error_netdev(netdev, "Received newlink with wrong KIND");
-                netdev_enter_failed(netdev);
-                return r;
-        }
-
-        r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
-        if (r < 0) {
-                log_error_netdev(netdev, "Could not get ifindex: %s", strerror(-r));
+                log_error_netdev(netdev, "Received newlink with wrong KIND %s, "
+                                 "expected %s", received_kind, kind);
                 netdev_enter_failed(netdev);
                 return r;
-        } else if (ifindex <= 0) {
-                log_error_netdev(netdev, "Got invalid ifindex: %d", ifindex);
-                netdev_enter_failed(netdev);
-                return r;
-        }
-
-        if (netdev->ifindex > 0 && netdev->ifindex != ifindex) {
-                log_error_netdev(netdev, "Could not set ifindex to %d, already set to %d",
-                                 ifindex, netdev->ifindex);
-                netdev_enter_failed(netdev);
-                return -EEXIST;
         }
 
         netdev->ifindex = ifindex;
@@ -455,6 +420,11 @@ static int netdev_load_one(Manager *manager, const char *filename) {
         assert(manager);
         assert(filename);
 
+        if (null_or_empty_path(filename)) {
+                log_debug("skipping empty file: %s", filename);
+                return 0;
+        }
+
         file = fopen(filename, "re");
         if (!file) {
                 if (errno == ENOENT)
@@ -532,6 +502,8 @@ static int netdev_load_one(Manager *manager, const char *filename) {
                         return r;
         }
 
+        log_debug_netdev(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
+
         netdev = NULL;
 
         return 0;