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zebra: use larger buffer (4096) for netlink messages

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Increase the maximum number of nexthops per route by using a larger
buffer for netlink messages.

  * zebra/rt_netlink.c: Use a buffer of 4096 bytes to parse/build
    netlink messages. Add a hash define for this number
    (NL_PKT_BUF_SIZE). Most places in the code were previously using a
    buffer of 1024 bytes.
This commit is contained in:
JR Rivers 2012-04-01 12:16:31 -07:00 committed by David Lamparter
parent d75318cc8d
commit 3cadc0cdeb
1 changed files with 12 additions and 10 deletions
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22
zebra/rt_netlink.c
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@ -43,6 +43,8 @@
#include "zebra/interface.h" #include "zebra/interface.h"
#include "zebra/debug.h" #include "zebra/debug.h"
#define NL_PKT_BUF_SIZE 4096
/* Socket interface to kernel */ /* Socket interface to kernel */
struct nlsock struct nlsock
{ {
@ -281,7 +283,7 @@ netlink_parse_info (int (*filter) (struct sockaddr_nl *, struct nlmsghdr *),
while (1) while (1)
{ {
char buf[4096]; char buf[NL_PKT_BUF_SIZE];
struct iovec iov = { buf, sizeof buf }; struct iovec iov = { buf, sizeof buf };
struct sockaddr_nl snl; struct sockaddr_nl snl;
struct msghdr msg = { (void *) &snl, sizeof snl, &iov, 1, NULL, 0, 0 }; struct msghdr msg = { (void *) &snl, sizeof snl, &iov, 1, NULL, 0, 0 };
@ -1363,7 +1365,7 @@ netlink_route (int cmd, int family, void *dest, int length, void *gate,
{ {
struct nlmsghdr n; struct nlmsghdr n;
struct rtmsg r; struct rtmsg r;
char buf[1024]; char buf[NL_PKT_BUF_SIZE];
} req; } req;
memset (&req, 0, sizeof req); memset (&req, 0, sizeof req);
@ -1438,7 +1440,7 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
{ {
struct nlmsghdr n; struct nlmsghdr n;
struct rtmsg r; struct rtmsg r;
char buf[1024]; char buf[NL_PKT_BUF_SIZE];
} req; } req;
memset (&req, 0, sizeof req); memset (&req, 0, sizeof req);
@ -1646,7 +1648,7 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
} }
else else
{ {
char buf[1024]; char buf[NL_PKT_BUF_SIZE];
struct rtattr *rta = (void *) buf; struct rtattr *rta = (void *) buf;
struct rtnexthop *rtnh; struct rtnexthop *rtnh;
union g_addr *src = NULL; union g_addr *src = NULL;
@ -1690,7 +1692,7 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
if (nexthop->rtype == NEXTHOP_TYPE_IPV4 if (nexthop->rtype == NEXTHOP_TYPE_IPV4
|| nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX) || nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX)
{ {
rta_addattr_l (rta, 4096, RTA_GATEWAY, rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY,
&nexthop->rgate.ipv4, bytelen); &nexthop->rgate.ipv4, bytelen);
rtnh->rtnh_len += sizeof (struct rtattr) + 4; rtnh->rtnh_len += sizeof (struct rtattr) + 4;
@ -1708,7 +1710,7 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
|| nexthop->rtype == NEXTHOP_TYPE_IPV6_IFNAME || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFNAME
|| nexthop->rtype == NEXTHOP_TYPE_IPV6_IFINDEX) || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFINDEX)
{ {
rta_addattr_l (rta, 4096, RTA_GATEWAY, rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY,
&nexthop->rgate.ipv6, bytelen); &nexthop->rgate.ipv6, bytelen);
if (IS_ZEBRA_DEBUG_KERNEL) if (IS_ZEBRA_DEBUG_KERNEL)
@ -1764,7 +1766,7 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
if (nexthop->type == NEXTHOP_TYPE_IPV4 if (nexthop->type == NEXTHOP_TYPE_IPV4
|| nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX)
{ {
rta_addattr_l (rta, 4096, RTA_GATEWAY, rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY,
&nexthop->gate.ipv4, bytelen); &nexthop->gate.ipv4, bytelen);
rtnh->rtnh_len += sizeof (struct rtattr) + 4; rtnh->rtnh_len += sizeof (struct rtattr) + 4;
@ -1782,7 +1784,7 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
|| nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME
|| nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)
{ {
rta_addattr_l (rta, 4096, RTA_GATEWAY, rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY,
&nexthop->gate.ipv6, bytelen); &nexthop->gate.ipv6, bytelen);
if (IS_ZEBRA_DEBUG_KERNEL) if (IS_ZEBRA_DEBUG_KERNEL)
@ -1828,7 +1830,7 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src->ipv4, bytelen); addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src->ipv4, bytelen);
if (rta->rta_len > RTA_LENGTH (0)) if (rta->rta_len > RTA_LENGTH (0))
addattr_l (&req.n, 1024, RTA_MULTIPATH, RTA_DATA (rta), addattr_l (&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, RTA_DATA (rta),
RTA_PAYLOAD (rta)); RTA_PAYLOAD (rta));
} }
@ -1897,7 +1899,7 @@ netlink_address (int cmd, int family, struct interface *ifp,
{ {
struct nlmsghdr n; struct nlmsghdr n;
struct ifaddrmsg ifa; struct ifaddrmsg ifa;
char buf[1024]; char buf[NL_PKT_BUF_SIZE];
} req; } req;
p = ifc->address; p = ifc->address;