leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ipv4: Namespacify ip_dynaddr sysctl knob

Browse Source 
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Borisov 2016-02-15 12:11:29 +02:00 committed by David S. Miller
parent dcd87999d4
commit 287b7f38fd
4 changed files with 12 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/ip.h
View File

@ -248,9 +248,6 @@ extern int inet_peer_maxttl;
/* From ip_input.c */
extern int sysctl_ip_early_demux;
/* From ip_output.c */
extern int sysctl_ip_dynaddr;
void ipfrag_init(void);
void ip_static_sysctl_init(void);

2
include/net/netns/ipv4.h
View File

@ -84,6 +84,8 @@ struct netns_ipv4 {
int sysctl_ip_no_pmtu_disc;
int sysctl_ip_fwd_use_pmtu;
int sysctl_ip_nonlocal_bind;
/* Shall we try to damage output packets if routing dev changes? */
int sysctl_ip_dynaddr;
int sysctl_fwmark_reflect;
int sysctl_tcp_fwmark_accept;

10
net/ipv4/af_inet.c
View File

@ -1095,12 +1095,6 @@ void inet_unregister_protosw(struct inet_protosw *p)
}
EXPORT_SYMBOL(inet_unregister_protosw);
/*
* Shall we try to damage output packets if routing dev changes?
*/
int sysctl_ip_dynaddr __read_mostly;
static int inet_sk_reselect_saddr(struct sock *sk)
{
struct inet_sock *inet = inet_sk(sk);
@ -1131,7 +1125,7 @@ static int inet_sk_reselect_saddr(struct sock *sk)
if (new_saddr == old_saddr)
return 0;
if (sysctl_ip_dynaddr > 1) {
if (sock_net(sk)->ipv4.sysctl_ip_dynaddr > 1) {
pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n",
__func__, &old_saddr, &new_saddr);
}
@ -1186,7 +1180,7 @@ int inet_sk_rebuild_header(struct sock *sk)
* Other protocols have to map its equivalent state to TCP_SYN_SENT.
* DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme
*/
if (!sysctl_ip_dynaddr ||
if (!sock_net(sk)->ipv4.sysctl_ip_dynaddr ||
sk->sk_state != TCP_SYN_SENT ||
(sk->sk_userlocks & SOCK_BINDADDR_LOCK) ||
(err = inet_sk_reselect_saddr(sk)) != 0)

15
net/ipv4/sysctl_net_ipv4.c
View File

@ -303,13 +303,6 @@ static struct ctl_table ipv4_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec
},
{
.procname = "ip_dynaddr",
.data = &sysctl_ip_dynaddr,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{
.procname = "tcp_fastopen",
.data = &sysctl_tcp_fastopen,
@ -743,6 +736,13 @@ static struct ctl_table ipv4_net_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec
},
{
.procname = "ip_dynaddr",
.data = &init_net.ipv4.sysctl_ip_dynaddr,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{
.procname = "ip_default_ttl",
.data = &init_net.ipv4.sysctl_ip_default_ttl,
@ -989,6 +989,7 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
goto err_ports;
net->ipv4.sysctl_ip_default_ttl = IPDEFTTL;
net->ipv4.sysctl_ip_dynaddr = 0;
return 0;