diff options
author | Nikolay Borisov <kernel@kyup.com> | 2016-02-15 10:11:27 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-02-17 01:42:54 (GMT) |
commit | fa50d974d104113630d68b7d03233a6686230d0c (patch) | |
tree | 17a12ad65afc3bf5302eba390262728d1b3b74dc /net/ipv4 | |
parent | 6cd21d79419c154a73be6fa31bc1a1f42ffd6815 (diff) | |
download | linux-fa50d974d104113630d68b7d03233a6686230d0c.tar.xz |
ipv4: Namespaceify ip_default_ttl sysctl knob
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r-- | net/ipv4/ip_output.c | 3 | ||||
-rw-r--r-- | net/ipv4/ip_sockglue.c | 5 | ||||
-rw-r--r-- | net/ipv4/netfilter/ipt_SYNPROXY.c | 3 | ||||
-rw-r--r-- | net/ipv4/proc.c | 2 | ||||
-rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 20 |
5 files changed, 18 insertions, 15 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 64878ef..f734c42 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -79,9 +79,6 @@ #include <linux/netlink.h> #include <linux/tcp.h> -int sysctl_ip_default_ttl __read_mostly = IPDEFTTL; -EXPORT_SYMBOL(sysctl_ip_default_ttl); - static int ip_fragment(struct net *net, struct sock *sk, struct sk_buff *skb, unsigned int mtu, diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index 92808f1..3f1befc 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -1341,10 +1341,13 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname, val = inet->tos; break; case IP_TTL: + { + struct net *net = sock_net(sk); val = (inet->uc_ttl == -1 ? - sysctl_ip_default_ttl : + net->ipv4.sysctl_ip_default_ttl : inet->uc_ttl); break; + } case IP_HDRINCL: val = inet->hdrincl; break; diff --git a/net/ipv4/netfilter/ipt_SYNPROXY.c b/net/ipv4/netfilter/ipt_SYNPROXY.c index 5fdc556..7b8fbb35 100644 --- a/net/ipv4/netfilter/ipt_SYNPROXY.c +++ b/net/ipv4/netfilter/ipt_SYNPROXY.c @@ -21,6 +21,7 @@ static struct iphdr * synproxy_build_ip(struct sk_buff *skb, __be32 saddr, __be32 daddr) { struct iphdr *iph; + struct net *net = sock_net(skb->sk); skb_reset_network_header(skb); iph = (struct iphdr *)skb_put(skb, sizeof(*iph)); @@ -29,7 +30,7 @@ synproxy_build_ip(struct sk_buff *skb, __be32 saddr, __be32 daddr) iph->tos = 0; iph->id = 0; iph->frag_off = htons(IP_DF); - iph->ttl = sysctl_ip_default_ttl; + iph->ttl = net->ipv4.sysctl_ip_default_ttl; iph->protocol = IPPROTO_TCP; iph->check = 0; iph->saddr = saddr; diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c index 3abd9d7..9f665b6 100644 --- a/net/ipv4/proc.c +++ b/net/ipv4/proc.c @@ -390,7 +390,7 @@ static int snmp_seq_show(struct seq_file *seq, void *v) seq_printf(seq, "\nIp: %d %d", IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, - sysctl_ip_default_ttl); + net->ipv4.sysctl_ip_default_ttl); BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index b537338..a833a9f 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -283,15 +283,6 @@ static struct ctl_table ipv4_table[] = { .proc_handler = proc_dointvec }, { - .procname = "ip_default_ttl", - .data = &sysctl_ip_default_ttl, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = &ip_ttl_min, - .extra2 = &ip_ttl_max, - }, - { .procname = "tcp_max_orphans", .data = &sysctl_tcp_max_orphans, .maxlen = sizeof(int), @@ -753,6 +744,15 @@ static struct ctl_table ipv4_net_table[] = { .proc_handler = proc_dointvec }, { + .procname = "ip_default_ttl", + .data = &init_net.ipv4.sysctl_ip_default_ttl, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = &ip_ttl_min, + .extra2 = &ip_ttl_max, + }, + { .procname = "ip_local_port_range", .maxlen = sizeof(init_net.ipv4.ip_local_ports.range), .data = &init_net.ipv4.ip_local_ports.range, @@ -988,6 +988,8 @@ static __net_init int ipv4_sysctl_init_net(struct net *net) if (!net->ipv4.sysctl_local_reserved_ports) goto err_ports; + net->ipv4.sysctl_ip_default_ttl = IPDEFTTL; + return 0; err_ports: |