Author: cy
Date: Thu Dec 12 20:44:49 2019
New Revision: 355670
URL: https://svnweb.freebsd.org/changeset/base/355670
Log:
Rather than pass the address of the packet information control block to
ipf_pcksum6(), directly pass the adddress of the mbuf to it. This reduces
one pointer dereference. ipf_pcksum6() doesn't use the packet information
control block except to obtain the mbuf address.
MFC after: 3 days
Modified:
head/sys/contrib/ipfilter/netinet/fil.c
head/sys/contrib/ipfilter/netinet/ip_fil.h
head/sys/contrib/ipfilter/netinet/ip_fil_freebsd.c
Modified: head/sys/contrib/ipfilter/netinet/fil.c
==============================================================================
--- head/sys/contrib/ipfilter/netinet/fil.c Thu Dec 12 20:44:46 2019
(r355669)
+++ head/sys/contrib/ipfilter/netinet/fil.c Thu Dec 12 20:44:49 2019
(r355670)
@@ -3436,7 +3436,7 @@ fr_cksum(fin, ip, l4proto, l4hdr)
ip6 = (ip6_t *)ip;
off = ((caddr_t)ip6 - m->m_data) + sizeof(struct ip6_hdr);
int len = ntohs(ip6->ip6_plen) - (off - sizeof(*ip6));
- return(ipf_pcksum6(fin, ip6, off, len));
+ return(ipf_pcksum6(m, ip6, off, len));
} else {
return 0xffff;
}
Modified: head/sys/contrib/ipfilter/netinet/ip_fil.h
==============================================================================
--- head/sys/contrib/ipfilter/netinet/ip_fil.h Thu Dec 12 20:44:46 2019
(r355669)
+++ head/sys/contrib/ipfilter/netinet/ip_fil.h Thu Dec 12 20:44:49 2019
(r355670)
@@ -1840,7 +1840,7 @@ extern int ipf_matchicmpqueryreply
__P((int, icmpinfo
extern u_32_t ipf_newisn __P((fr_info_t *));
extern u_int ipf_pcksum __P((fr_info_t *, int, u_int));
#ifdef USE_INET6
-extern u_int ipf_pcksum6 __P((fr_info_t *, ip6_t *,
+extern u_int ipf_pcksum6 __P((struct mbuf *, ip6_t *,
u_int32_t, u_int32_t));
#endif
extern void ipf_rule_expire __P((ipf_main_softc_t *));
Modified: head/sys/contrib/ipfilter/netinet/ip_fil_freebsd.c
==============================================================================
--- head/sys/contrib/ipfilter/netinet/ip_fil_freebsd.c Thu Dec 12 20:44:46
2019 (r355669)
+++ head/sys/contrib/ipfilter/netinet/ip_fil_freebsd.c Thu Dec 12 20:44:49
2019 (r355670)
@@ -1456,17 +1456,15 @@ ipf_pcksum(fin, hlen, sum)
#ifdef USE_INET6
u_int
-ipf_pcksum6(fin, ip6, off, len)
- fr_info_t *fin;
+ipf_pcksum6(m, ip6, off, len)
+ struct mbuf *m;
ip6_t *ip6;
u_int32_t off;
u_int32_t len;
{
#ifdef _KERNEL
- struct mbuf *m;
int sum;
- m = fin->fin_m;
if (m->m_len < sizeof(struct ip6_hdr)) {
return 0xffff;
}
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