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Allocate in6_ifextra (ifp->if_afdata[AF_INET6]) only for IPv6-capable

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interfaces.  This eliminates unnecessary IPv6 processing for non-IPv6
interfaces.

MFC after:	3 days
This commit is contained in:
Hiroki Sato 2013-07-31 16:24:49 +00:00
parent fcd9ff2c67
commit 0de0dd9be8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=253841
3 changed files with 12 additions and 8 deletions
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7
sys/netinet6/in6.c
View File

@ -2746,6 +2746,13 @@ in6_domifattach(struct ifnet *ifp)
{
struct in6_ifextra *ext;
/* There are not IPv6-capable interfaces. */
switch (ifp->if_type) {
case IFT_PFLOG:
case IFT_PFSYNC:
case IFT_USB:
return (NULL);
}
ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
bzero(ext, sizeof(*ext));

9
sys/netinet6/in6_ifattach.c
View File

@ -724,15 +724,8 @@ in6_ifattach(struct ifnet *ifp, struct ifnet *altifp)
struct in6_ifaddr *ia;
struct in6_addr in6;
/* some of the interfaces are inherently not IPv6 capable */
switch (ifp->if_type) {
case IFT_PFLOG:
case IFT_PFSYNC:
ND_IFINFO(ifp)->flags &= ~ND6_IFF_AUTO_LINKLOCAL;
ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED;
if (ifp->if_afdata[AF_INET6] == NULL)
return;
}
/*
* quirks based on interface type
*/

4
sys/netinet6/nd6.c
View File

@ -1227,6 +1227,8 @@ nd6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp)
struct nd_prefix *pr;
int i = 0, error = 0;
if (ifp->if_afdata[AF_INET6] == NULL)
return (EPFNOSUPPORT);
switch (cmd) {
case SIOCGDRLST_IN6:
/*
@ -1801,6 +1803,8 @@ nd6_slowtimo(void *arg)
nd6_slowtimo, curvnet);
IFNET_RLOCK_NOSLEEP();
TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
if (ifp->if_afdata[AF_INET6] == NULL)
continue;
nd6if = ND_IFINFO(ifp);
if (nd6if->basereachable && /* already initialized */
(nd6if->recalctm -= ND6_SLOWTIMER_INTERVAL) <= 0) {