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networkd: tie links to rtnl rather than udev
[elogind.git] / src / network / networkd-netdev.c
diff --git a/src/network/networkd-netdev.c b/src/network/networkd-netdev.c
index 9f580aeab9dd8d7425e800115d4db920cbd94576..b7fc48db94afbfe909f4604a7815eed66f473e8e 100644 (file)
--- a/src/network/networkd-netdev.c
+++ b/src/network/networkd-netdev.c
@@ -20,7 +20,7 @@
 ***/
 
 #include "networkd.h"
-#include "net-util.h"
+#include "network-internal.h"
 #include "path-util.h"
 #include "conf-files.h"
 #include "conf-parser.h"
@@ -28,7 +28,7 @@
 
 #define VLANID_MAX 4094
 
-static const char* const netdev_kind_table[] = {
+static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
         [NETDEV_KIND_BRIDGE] = "bridge",
         [NETDEV_KIND_BOND] = "bond",
         [NETDEV_KIND_VLAN] = "vlan",
@@ -38,7 +38,7 @@ static const char* const netdev_kind_table[] = {
 DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
 DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind");
 
-static const char* const macvlan_mode_table[] = {
+static const char* const macvlan_mode_table[_NETDEV_MACVLAN_MODE_MAX] = {
         [NETDEV_MACVLAN_MODE_PRIVATE] = "private",
         [NETDEV_MACVLAN_MODE_VEPA] = "vepa",
         [NETDEV_MACVLAN_MODE_BRIDGE] = "bridge",
@@ -67,6 +67,11 @@ void netdev_free(NetDev *netdev) {
         free(netdev->description);
         free(netdev->name);
 
+        condition_free_list(netdev->match_host);
+        condition_free_list(netdev->match_virt);
+        condition_free_list(netdev->match_kernel);
+        condition_free_list(netdev->match_arch);
+
         free(netdev);
 }
 
@@ -141,6 +146,9 @@ static int netdev_enter_ready(NetDev *netdev) {
         assert(netdev);
         assert(netdev->name);
 
+        if (netdev->state != NETDEV_STATE_CREATING)
+                return 0;
+
         netdev->state = NETDEV_STATE_READY;
 
         log_info_netdev(netdev, "netdev ready");
@@ -153,7 +161,6 @@ static int netdev_enter_ready(NetDev *netdev) {
 
         return 0;
 }
-
 static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
         NetDev *netdev = userdata;
         int r;
@@ -161,7 +168,9 @@ static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userda
         assert(netdev->state != _NETDEV_STATE_INVALID);
 
         r = sd_rtnl_message_get_errno(m);
-        if (r < 0) {
+        if (r == -EEXIST)
+                log_debug_netdev(netdev, "netdev exists, using existing");
+        else if (r < 0) {
                 log_warning_netdev(netdev, "netdev failed: %s", strerror(-r));
                 netdev_enter_failed(netdev);
 
@@ -223,52 +232,42 @@ static int netdev_create(NetDev *netdev, Link *link, sd_rtnl_message_handler_t c
                 return -EINVAL;
         }
 
-        r = sd_rtnl_message_append_string(req, IFLA_INFO_KIND, kind);
+        r = sd_rtnl_message_open_container_union(req, IFLA_INFO_DATA, kind);
         if (r < 0) {
                 log_error_netdev(netdev,
-                                 "Could not append IFLA_INFO_KIND attribute: %s",
-                                 strerror(-r));
+                                 "Could not open IFLA_INFO_DATA container: %s",
+                                  strerror(-r));
                 return r;
         }
 
-        if (netdev->vlanid <= VLANID_MAX || netdev->macvlan_mode != _NETDEV_MACVLAN_MODE_INVALID) {
-                r = sd_rtnl_message_open_container(req, IFLA_INFO_DATA);
+        if (netdev->vlanid <= VLANID_MAX) {
+                r = sd_rtnl_message_append_u16(req, IFLA_VLAN_ID, netdev->vlanid);
                 if (r < 0) {
                         log_error_netdev(netdev,
-                                         "Could not open IFLA_INFO_DATA container: %s",
+                                         "Could not append IFLA_VLAN_ID attribute: %s",
                                          strerror(-r));
                         return r;
                 }
+        }
 
-                if (netdev->vlanid <= VLANID_MAX) {
-                        r = sd_rtnl_message_append_u16(req, IFLA_VLAN_ID, netdev->vlanid);
-                        if (r < 0) {
-                                log_error_netdev(netdev,
-                                                 "Could not append IFLA_VLAN_ID attribute: %s",
-                                                 strerror(-r));
-                                return r;
-                        }
-                }
-
-                if (netdev->macvlan_mode != _NETDEV_MACVLAN_MODE_INVALID) {
-                        r = sd_rtnl_message_append_u32(req, IFLA_MACVLAN_MODE, netdev->macvlan_mode);
-                        if (r < 0) {
-                                log_error_netdev(netdev,
-                                                 "Could not append IFLA_MACVLAN_MODE attribute: %s",
-                                                 strerror(-r));
-                                return r;
-                        }
-                }
-
-                r = sd_rtnl_message_close_container(req);
-                if (r < 0) {
-                        log_error_netdev(netdev,
-                                         "Could not close IFLA_INFO_DATA container %s",
-                                         strerror(-r));
+        if (netdev->macvlan_mode != _NETDEV_MACVLAN_MODE_INVALID) {
+        r = sd_rtnl_message_append_u32(req, IFLA_MACVLAN_MODE, netdev->macvlan_mode);
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not append IFLA_MACVLAN_MODE attribute: %s",
+                                 strerror(-r));
                         return r;
                 }
         }
 
+        r = sd_rtnl_message_close_container(req);
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not close IFLA_INFO_DATA container %s",
+                                 strerror(-r));
+                return r;
+        }
+
         r = sd_rtnl_message_close_container(req);
         if (r < 0) {
                 log_error_netdev(netdev,
@@ -317,15 +316,73 @@ int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callbac
         return 0;
 }
 
-int netdev_set_ifindex(NetDev *netdev, int ifindex) {
+int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) {
+        uint16_t type;
+        const char *kind;
+        char *received_kind;
+        int r, ifindex;
+
         assert(netdev);
-        assert(ifindex > 0);
+        assert(message);
 
-        if (netdev->ifindex > 0) {
-                if (netdev->ifindex == ifindex)
-                        return 0;
-                else
-                        return -EEXIST;
+        r = sd_rtnl_message_get_type(message, &type);
+        if (r < 0) {
+                log_error_netdev(netdev, "Could not get rtnl message type");
+                return r;
+        }
+
+        if (type != RTM_NEWLINK) {
+                log_error_netdev(netdev, "Can not set ifindex from unexpected rtnl message type");
+                return -EINVAL;
+        }
+
+        r = sd_rtnl_message_enter_container(message, IFLA_LINKINFO);
+        if (r < 0) {
+                log_error_netdev(netdev, "Could not get LINKINFO");
+                return r;
+        }
+
+        r = sd_rtnl_message_read_string(message, IFLA_INFO_KIND, &received_kind);
+        if (r < 0) {
+                log_error_netdev(netdev, "Could not get KIND");
+                return r;
+        }
+
+        r = sd_rtnl_message_exit_container(message);
+        if (r < 0) {
+                log_error_netdev(netdev, "Could not exit container");
+                return r;
+        }
+
+        kind = netdev_kind_to_string(netdev->kind);
+        if (!kind) {
+                log_error_netdev(netdev, "Could not get kind");
+                netdev_enter_failed(netdev);
+                return -EINVAL;
+        }
+
+        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));
+                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;
@@ -348,7 +405,7 @@ static int netdev_load_one(Manager *manager, const char *filename) {
                 if (errno == ENOENT)
                         return 0;
                 else
-                        return errno;
+                        return -errno;
         }
 
         netdev = new0(NetDev, 1);
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