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According to in_pcb.h protocol binding information has double locking.

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It allows access it while list travercing holding only global pcbinfo lock.
This commit is contained in:
Alexander Motin 2008-07-27 20:30:34 +00:00
parent 35db2ce0dc
commit b11e21ae80
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=180850
2 changed files with 14 additions and 20 deletions
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17
sys/netinet6/icmp6.c
View file

@ -1897,24 +1897,20 @@ icmp6_rip6_input(struct mbuf **mp, int off)
INP_INFO_RLOCK(&ripcbinfo);
LIST_FOREACH(in6p, &ripcb, inp_list) {
INP_RLOCK(in6p);
if ((in6p->inp_vflag & INP_IPV6) == 0) {
docontinue:
INP_RUNLOCK(in6p);
if ((in6p->inp_vflag & INP_IPV6) == 0)
continue;
}
if (in6p->in6p_ip6_nxt != IPPROTO_ICMPV6)
goto docontinue;
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
goto docontinue;
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
goto docontinue;
continue;
if (in6p->in6p_icmp6filt
&& ICMP6_FILTER_WILLBLOCK(icmp6->icmp6_type,
in6p->in6p_icmp6filt))
goto docontinue;
continue;
if (last) {
struct mbuf *n = NULL;
@ -1974,7 +1970,9 @@ icmp6_rip6_input(struct mbuf **mp, int off)
INP_RUNLOCK(last);
}
last = in6p;
INP_RLOCK(last);
}
INP_INFO_RUNLOCK(&ripcbinfo);
if (last) {
if (last->in6p_flags & IN6P_CONTROLOPTS)
ip6_savecontrol(last, m, &opts);
@ -2014,7 +2012,6 @@ icmp6_rip6_input(struct mbuf **mp, int off)
m_freem(m);
ip6stat.ip6s_delivered--;
}
INP_INFO_RUNLOCK(&ripcbinfo);
return IPPROTO_DONE;
}

17
sys/netinet6/raw_ip6.c
View file

@ -154,27 +154,23 @@ rip6_input(struct mbuf **mp, int *offp, int proto)
INP_INFO_RLOCK(&ripcbinfo);
LIST_FOREACH(in6p, &ripcb, inp_list) {
INP_RLOCK(in6p);
if ((in6p->in6p_vflag & INP_IPV6) == 0) {
docontinue:
INP_RUNLOCK(in6p);
if ((in6p->in6p_vflag & INP_IPV6) == 0)
continue;
}
if (in6p->in6p_ip6_nxt &&
in6p->in6p_ip6_nxt != proto)
goto docontinue;
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
goto docontinue;
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
goto docontinue;
continue;
if (in6p->in6p_cksum != -1) {
rip6stat.rip6s_isum++;
if (in6_cksum(m, proto, *offp,
m->m_pkthdr.len - *offp)) {
rip6stat.rip6s_badsum++;
goto docontinue;
continue;
}
}
if (last) {
@ -210,7 +206,9 @@ rip6_input(struct mbuf **mp, int *offp, int proto)
INP_RUNLOCK(last);
}
last = in6p;
INP_RLOCK(last);
}
INP_INFO_RUNLOCK(&ripcbinfo);
#ifdef IPSEC
/*
* Check AH/ESP integrity.
@ -252,7 +250,6 @@ rip6_input(struct mbuf **mp, int *offp, int proto)
}
ip6stat.ip6s_delivered--;
}
INP_INFO_RUNLOCK(&ripcbinfo);
return (IPPROTO_DONE);
}