From f1ef81b2476ea533ac3d2129aa0e89653c427323 Mon Sep 17 00:00:00 2001 From: Ulrich Weber Date: Tue, 22 Jan 2013 10:39:18 +0000 Subject: zebra: use SO_RCVBUFFORCE for netlink socket so net.core.rmem_max must not be adjusted. Requires linux kernel >= 2.6.14, falls back to SO_RCVBUF on error Signed-off-by: Ulrich Weber Signed-off-by: David Lamparter --- zebra/rt_netlink.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'zebra') diff --git a/zebra/rt_netlink.c b/zebra/rt_netlink.c index fa446a56..bab17037 100644 --- a/zebra/rt_netlink.c +++ b/zebra/rt_netlink.c @@ -101,6 +101,10 @@ set_ifindex(struct interface *ifp, unsigned int ifi_index) ifp->ifindex = ifi_index; } +#ifndef SO_RCVBUFFORCE +#define SO_RCVBUFFORCE (33) +#endif + static int netlink_recvbuf (struct nlsock *nl, uint32_t newsize) { @@ -117,8 +121,16 @@ netlink_recvbuf (struct nlsock *nl, uint32_t newsize) return -1; } - ret = setsockopt(nl->sock, SOL_SOCKET, SO_RCVBUF, &nl_rcvbufsize, + /* Try force option (linux >= 2.6.14) and fall back to normal set */ + if ( zserv_privs.change (ZPRIVS_RAISE) ) + zlog_err ("routing_socket: Can't raise privileges"); + ret = setsockopt(nl->sock, SOL_SOCKET, SO_RCVBUFFORCE, &nl_rcvbufsize, sizeof(nl_rcvbufsize)); + if ( zserv_privs.change (ZPRIVS_LOWER) ) + zlog_err ("routing_socket: Can't lower privileges"); + if (ret < 0) + ret = setsockopt(nl->sock, SOL_SOCKET, SO_RCVBUF, &nl_rcvbufsize, + sizeof(nl_rcvbufsize)); if (ret < 0) { zlog (NULL, LOG_ERR, "Can't set %s receive buffer size: %s", nl->name, -- cgit v1.2.1