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With IPv4 raw sockets, read lock rather than write lock the inpcb when

Browse Source 
receiving or transmitting.

With IPv6 raw sockets, read lock rather than write lock the inpcb when
receiving.  Unfortunately, IPv6 source address selection appears to
require a write lock on the inpcb for the time being.

MFC after:	3 months
This commit is contained in:
Robert Watson 2008-04-21 12:06:41 +00:00
parent 3656a4fe2e
commit 9ad11dd8a4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=178377
2 changed files with 20 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
sys/netinet/raw_ip.c
View File

@ -155,7 +155,7 @@ raw_append(struct inpcb *last, struct ip *ip, struct mbuf *n)
{
int policyfail = 0;
INP_WLOCK_ASSERT(last);
INP_RLOCK_ASSERT(last);
#ifdef IPSEC
/* check AH/ESP integrity. */
@ -209,10 +209,10 @@ rip_input(struct mbuf *m, int off)
ripsrc.sin_addr = ip->ip_src;
last = NULL;
LIST_FOREACH(inp, &ripcb, inp_list) {
INP_WLOCK(inp);
INP_RLOCK(inp);
if (inp->inp_ip_p && inp->inp_ip_p != proto) {
docontinue:
INP_WUNLOCK(inp);
INP_RUNLOCK(inp);
continue;
}
#ifdef INET6
@ -236,14 +236,14 @@ rip_input(struct mbuf *m, int off)
if (n != NULL)
(void) raw_append(last, ip, n);
/* XXX count dropped packet */
INP_WUNLOCK(last);
INP_RUNLOCK(last);
}
last = inp;
}
if (last != NULL) {
if (raw_append(last, ip, m) != 0)
ipstat.ips_delivered--;
INP_WUNLOCK(last);
INP_RUNLOCK(last);
} else {
m_freem(m);
ipstat.ips_noproto++;
@ -278,7 +278,7 @@ rip_output(struct mbuf *m, struct socket *so, u_long dst)
if (m == NULL)
return(ENOBUFS);
INP_WLOCK(inp);
INP_RLOCK(inp);
ip = mtod(m, struct ip *);
ip->ip_tos = inp->inp_ip_tos;
if (inp->inp_flags & INP_DONTFRAG)
@ -299,12 +299,12 @@ rip_output(struct mbuf *m, struct socket *so, u_long dst)
m_freem(m);
return(EMSGSIZE);
}
INP_WLOCK(inp);
INP_RLOCK(inp);
ip = mtod(m, struct ip *);
if (jailed(inp->inp_socket->so_cred)) {
if (ip->ip_src.s_addr !=
htonl(prison_getip(inp->inp_socket->so_cred))) {
INP_WUNLOCK(inp);
INP_RUNLOCK(inp);
m_freem(m);
return (EPERM);
}
@ -315,7 +315,7 @@ rip_output(struct mbuf *m, struct socket *so, u_long dst)
&& inp->inp_options)
|| (ip->ip_len > m->m_pkthdr.len)
|| (ip->ip_len < (ip->ip_hl << 2))) {
INP_WUNLOCK(inp);
INP_RUNLOCK(inp);
m_freem(m);
return EINVAL;
}
@ -335,7 +335,7 @@ rip_output(struct mbuf *m, struct socket *so, u_long dst)
error = ip_output(m, inp->inp_options, NULL, flags,
inp->inp_moptions, inp);
INP_WUNLOCK(inp);
INP_RUNLOCK(inp);
return error;
}
@ -851,13 +851,13 @@ rip_pcblist(SYSCTL_HANDLER_ARGS)
INP_INFO_RLOCK(&ripcbinfo);
for (inp = LIST_FIRST(ripcbinfo.ipi_listhead), i = 0; inp && i < n;
inp = LIST_NEXT(inp, inp_list)) {
INP_WLOCK(inp);
INP_RLOCK(inp);
if (inp->inp_gencnt <= gencnt &&
cr_canseesocket(req->td->td_ucred, inp->inp_socket) == 0) {
/* XXX held references? */
inp_list[i++] = inp;
}
INP_WUNLOCK(inp);
INP_RUNLOCK(inp);
}
INP_INFO_RUNLOCK(&ripcbinfo);
n = i;
@ -865,7 +865,7 @@ rip_pcblist(SYSCTL_HANDLER_ARGS)
error = 0;
for (i = 0; i < n; i++) {
inp = inp_list[i];
INP_WLOCK(inp);
INP_RLOCK(inp);
if (inp->inp_gencnt <= gencnt) {
struct xinpcb xi;
bzero(&xi, sizeof(xi));
@ -874,10 +874,10 @@ rip_pcblist(SYSCTL_HANDLER_ARGS)
bcopy(inp, &xi.xi_inp, sizeof *inp);
if (inp->inp_socket)
sotoxsocket(inp->inp_socket, &xi.xi_socket);
INP_WUNLOCK(inp);
INP_RUNLOCK(inp);
error = SYSCTL_OUT(req, &xi, sizeof xi);
} else
INP_WUNLOCK(inp);
INP_RUNLOCK(inp);
}
if (!error) {
/*

10
sys/netinet6/raw_ip6.c
View File

@ -154,10 +154,10 @@ rip6_input(struct mbuf **mp, int *offp, int proto)
INP_INFO_RLOCK(&ripcbinfo);
LIST_FOREACH(in6p, &ripcb, inp_list) {
INP_WLOCK(in6p);
INP_RLOCK(in6p);
if ((in6p->in6p_vflag & INP_IPV6) == 0) {
docontinue:
INP_WUNLOCK(in6p);
INP_RUNLOCK(in6p);
continue;
}
if (in6p->in6p_ip6_nxt &&
@ -207,7 +207,7 @@ rip6_input(struct mbuf **mp, int *offp, int proto)
sorwakeup(last->in6p_socket);
opts = NULL;
}
INP_WUNLOCK(last);
INP_RUNLOCK(last);
}
last = in6p;
}
@ -220,7 +220,7 @@ rip6_input(struct mbuf **mp, int *offp, int proto)
ipsec6stat.in_polvio++;
ip6stat.ip6s_delivered--;
/* do not inject data into pcb */
INP_WUNLOCK(last);
INP_RUNLOCK(last);
} else
#endif /* IPSEC */
if (last) {
@ -237,7 +237,7 @@ rip6_input(struct mbuf **mp, int *offp, int proto)
rip6stat.rip6s_fullsock++;
} else
sorwakeup(last->in6p_socket);
INP_WUNLOCK(last);
INP_RUNLOCK(last);
} else {
rip6stat.rip6s_nosock++;
if (m->m_flags & M_MCAST)