pimd: Increase kernel socket rcvbuf size.

We are receiving notifications from the linux
kernel that we are filling up the receive buffer
for upcalls into pimd.  Let's increase the size
to something a bit bigger.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

diff --git a/pimd/pim_mroute.c b/pimd/pim_mroute.c
index 2557ac9710c272bbe5ce3d6c4c0330c48703dc04..3b8aed033c3e1f32ca6049c52ab44ad94a89583a 100644 (file)
--- a/pimd/pim_mroute.c
+++ b/pimd/pim_mroute.c
@@ -53,6 +53,7 @@ static int pim_mroute_set(int fd, int enable)
   int err;
   int opt = enable ? MRT_INIT : MRT_DONE;
   socklen_t opt_len = sizeof(opt);
+  int rcvbuf = 1024 * 1024 * 8;
 
   err = setsockopt(fd, IPPROTO_IP, opt, &opt, opt_len);
   if (err) {
@@ -62,6 +63,12 @@ static int pim_mroute_set(int fd, int enable)
     return -1;
   }
 
+  err = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(rcvbuf));
+  if (err) {
+    zlog_warn("%s: failure: setsockopt(fd=%d, SOL_SOCKET, %d): errno=%d: %s",
+             __PRETTY_FUNCTION__, fd, rcvbuf, errno, safe_strerror(errno));
+  }
+
   if (enable)
     {
       int upcalls = IGMPMSG_WRVIFWHOLE;