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[IPV6]: Share common code-paths for sticky socket options. 

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2008-04-13 23:21:52 -07:00 committed by David S. Miller
parent cee8947338
commit e7712f1a7c
1 changed files with 25 additions and 39 deletions
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64
net/ipv6/ipv6_sockglue.c
View File

@ -103,6 +103,29 @@ int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
return 0;
}
static
struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
struct ipv6_txoptions *opt)
{
if (inet_sk(sk)->is_icsk) {
if (opt &&
!((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
struct inet_connection_sock *icsk = inet_csk(sk);
icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen;
icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
}
opt = xchg(&inet6_sk(sk)->opt, opt);
} else {
write_lock(&sk->sk_dst_lock);
opt = xchg(&inet6_sk(sk)->opt, opt);
write_unlock(&sk->sk_dst_lock);
}
sk_dst_reset(sk);
return opt;
}
static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
@ -351,25 +374,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
}
retv = 0;
if (inet_sk(sk)->is_icsk) {
if (opt) {
struct inet_connection_sock *icsk = inet_csk(sk);
if (!((1 << sk->sk_state) &
(TCPF_LISTEN | TCPF_CLOSE))
&& inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
icsk->icsk_ext_hdr_len =
opt->opt_flen + opt->opt_nflen;
icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
}
}
opt = xchg(&np->opt, opt);
sk_dst_reset(sk);
} else {
write_lock(&sk->sk_dst_lock);
opt = xchg(&np->opt, opt);
write_unlock(&sk->sk_dst_lock);
sk_dst_reset(sk);
}
opt = ipv6_update_options(sk, opt);
sticky_done:
if (opt)
sock_kfree_s(sk, opt, opt->tot_len);
@ -415,26 +420,7 @@ sticky_done:
goto done;
update:
retv = 0;
if (inet_sk(sk)->is_icsk) {
if (opt) {
struct inet_connection_sock *icsk = inet_csk(sk);
if (!((1 << sk->sk_state) &
(TCPF_LISTEN | TCPF_CLOSE))
&& inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
icsk->icsk_ext_hdr_len =
opt->opt_flen + opt->opt_nflen;
icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
}
}
opt = xchg(&np->opt, opt);
sk_dst_reset(sk);
} else {
write_lock(&sk->sk_dst_lock);
opt = xchg(&np->opt, opt);
write_unlock(&sk->sk_dst_lock);
sk_dst_reset(sk);
}
opt = ipv6_update_options(sk, opt);
done:
if (opt)
sock_kfree_s(sk, opt, opt->tot_len);