tap: add support for persistance

[vpp.git] / src / vnet / devices / netlink.c

diff --git a/src/vnet/devices/netlink.c b/src/vnet/devices/netlink.c
index 8346b1c..e3e33a3 100644 (file)
--- a/src/vnet/devices/netlink.c
+++ b/src/vnet/devices/netlink.c
@@ -38,7 +38,7 @@ vnet_netlink_msg_init (vnet_netlink_msg_t * m, u16 type, u16 flags,
 {
   struct nlmsghdr *nh;
   u8 *p;
-  memset (m, 0, sizeof (vnet_netlink_msg_t));
+  clib_memset (m, 0, sizeof (vnet_netlink_msg_t));
   vec_add2 (m->data, p, NLMSG_SPACE (msg_len));
   ASSERT (m->data == p);
 
@@ -76,7 +76,7 @@ vnet_netlink_msg_send (vnet_netlink_msg_t * m)
     return clib_error_return_unix (0, "socket(AF_NETLINK)");
 
   ra.nl_family = AF_NETLINK;
-  ra.nl_pid = getpid ();
+  ra.nl_pid = 0;
 
   if ((bind (sock, (struct sockaddr *) &ra, sizeof (ra))) == -1)
     {
@@ -116,6 +116,7 @@ vnet_netlink_set_link_name (int ifindex, char *new_ifname)
 {
   vnet_netlink_msg_t m;
   struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
 
   ifmsg.ifi_index = ifindex;
   vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
@@ -124,7 +125,10 @@ vnet_netlink_set_link_name (int ifindex, char *new_ifname)
   vnet_netlink_msg_add_rtattr (&m, IFLA_IFNAME, new_ifname,
                               strlen (new_ifname) + 1);
 
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link name %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -132,6 +136,7 @@ vnet_netlink_set_link_netns (int ifindex, int netns_fd, char *new_ifname)
 {
   vnet_netlink_msg_t m;
   struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
 
   ifmsg.ifi_index = ifindex;
   vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
@@ -142,7 +147,10 @@ vnet_netlink_set_link_netns (int ifindex, int netns_fd, char *new_ifname)
     vnet_netlink_msg_add_rtattr (&m, IFLA_IFNAME, new_ifname,
                                 strlen (new_ifname) + 1);
 
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link netns %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -151,6 +159,7 @@ vnet_netlink_set_link_master (int ifindex, char *master_ifname)
   vnet_netlink_msg_t m;
   struct ifinfomsg ifmsg = { 0 };
   int i;
+  clib_error_t *err = 0;
 
   ifmsg.ifi_index = ifindex;
 
@@ -161,7 +170,10 @@ vnet_netlink_set_link_master (int ifindex, char *master_ifname)
   vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
                         &ifmsg, sizeof (struct ifinfomsg));
   vnet_netlink_msg_add_rtattr (&m, IFLA_MASTER, &i, sizeof (int));
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link master %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -169,13 +181,17 @@ vnet_netlink_set_link_addr (int ifindex, u8 * mac)
 {
   vnet_netlink_msg_t m;
   struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
 
   ifmsg.ifi_index = ifindex;
 
   vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
                         &ifmsg, sizeof (struct ifinfomsg));
   vnet_netlink_msg_add_rtattr (&m, IFLA_ADDRESS, mac, 6);
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link addr %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -183,6 +199,7 @@ vnet_netlink_set_link_state (int ifindex, int up)
 {
   vnet_netlink_msg_t m;
   struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
 
   ifmsg.ifi_flags = IFF_UP;
   ifmsg.ifi_change = IFF_UP;
@@ -190,7 +207,10 @@ vnet_netlink_set_link_state (int ifindex, int up)
 
   vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
                         &ifmsg, sizeof (struct ifinfomsg));
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link state %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -198,13 +218,17 @@ vnet_netlink_set_link_mtu (int ifindex, int mtu)
 {
   vnet_netlink_msg_t m;
   struct ifinfomsg ifmsg = { 0 };
+  clib_error_t *err = 0;
 
   ifmsg.ifi_index = ifindex;
 
   vnet_netlink_msg_init (&m, RTM_SETLINK, NLM_F_REQUEST,
                         &ifmsg, sizeof (struct ifinfomsg));
   vnet_netlink_msg_add_rtattr (&m, IFLA_MTU, &mtu, sizeof (int));
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "set link mtu %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -212,18 +236,22 @@ vnet_netlink_add_ip4_addr (int ifindex, void *addr, int pfx_len)
 {
   vnet_netlink_msg_t m;
   struct ifaddrmsg ifa = { 0 };
+  clib_error_t *err = 0;
 
   ifa.ifa_family = AF_INET;
   ifa.ifa_prefixlen = pfx_len;
   ifa.ifa_index = ifindex;
 
   vnet_netlink_msg_init (&m, RTM_NEWADDR,
-                        NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL,
+                        NLM_F_REQUEST | NLM_F_REPLACE,
                         &ifa, sizeof (struct ifaddrmsg));
 
   vnet_netlink_msg_add_rtattr (&m, IFA_LOCAL, addr, 4);
   vnet_netlink_msg_add_rtattr (&m, IFA_ADDRESS, addr, 4);
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "add ip4 addr %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -231,18 +259,22 @@ vnet_netlink_add_ip6_addr (int ifindex, void *addr, int pfx_len)
 {
   vnet_netlink_msg_t m;
   struct ifaddrmsg ifa = { 0 };
+  clib_error_t *err = 0;
 
   ifa.ifa_family = AF_INET6;
   ifa.ifa_prefixlen = pfx_len;
   ifa.ifa_index = ifindex;
 
   vnet_netlink_msg_init (&m, RTM_NEWADDR,
-                        NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL,
+                        NLM_F_REQUEST | NLM_F_REPLACE,
                         &ifa, sizeof (struct ifaddrmsg));
 
   vnet_netlink_msg_add_rtattr (&m, IFA_LOCAL, addr, 16);
   vnet_netlink_msg_add_rtattr (&m, IFA_ADDRESS, addr, 16);
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "add ip6 addr %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -251,6 +283,7 @@ vnet_netlink_add_ip4_route (void *dst, u8 dst_len, void *gw)
   vnet_netlink_msg_t m;
   struct rtmsg rtm = { 0 };
   u8 dflt[4] = { 0 };
+  clib_error_t *err = 0;
 
   rtm.rtm_family = AF_INET;
   rtm.rtm_table = RT_TABLE_MAIN;
@@ -258,12 +291,15 @@ vnet_netlink_add_ip4_route (void *dst, u8 dst_len, void *gw)
   rtm.rtm_dst_len = dst_len;
 
   vnet_netlink_msg_init (&m, RTM_NEWROUTE,
-                        NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL,
+                        NLM_F_REQUEST | NLM_F_REPLACE,
                         &rtm, sizeof (struct rtmsg));
 
   vnet_netlink_msg_add_rtattr (&m, RTA_GATEWAY, gw, 4);
   vnet_netlink_msg_add_rtattr (&m, RTA_DST, dst ? dst : dflt, 4);
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "add ip4 route %U", format_clib_error, err);
+  return err;
 }
 
 clib_error_t *
@@ -272,6 +308,7 @@ vnet_netlink_add_ip6_route (void *dst, u8 dst_len, void *gw)
   vnet_netlink_msg_t m;
   struct rtmsg rtm = { 0 };
   u8 dflt[16] = { 0 };
+  clib_error_t *err = 0;
 
   rtm.rtm_family = AF_INET6;
   rtm.rtm_table = RT_TABLE_MAIN;
@@ -279,12 +316,15 @@ vnet_netlink_add_ip6_route (void *dst, u8 dst_len, void *gw)
   rtm.rtm_dst_len = dst_len;
 
   vnet_netlink_msg_init (&m, RTM_NEWROUTE,
-                        NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL,
+                        NLM_F_REQUEST | NLM_F_REPLACE,
                         &rtm, sizeof (struct rtmsg));
 
   vnet_netlink_msg_add_rtattr (&m, RTA_GATEWAY, gw, 16);
   vnet_netlink_msg_add_rtattr (&m, RTA_DST, dst ? dst : dflt, 16);
-  return vnet_netlink_msg_send (&m);
+  err = vnet_netlink_msg_send (&m);
+  if (err)
+    err = clib_error_return (0, "add ip6 route %U", format_clib_error, err);
+  return err;
 }
 
 /*