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[NETNS][IPV6]: Make sysctls route per namespace. 

All the sysctl concerning the routes are moved to the network
namespace structure. A helper function is called to initialize the
variables.

Because the ipv6 protocol is not yet per namespace, the variables are
accessed relatively from the network namespace.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Lezcano 2008-01-10 03:01:01 -08:00 committed by David S. Miller
parent 7c76509d0d
commit 4990509f19
6 changed files with 56 additions and 36 deletions
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2
include/net/ip6_route.h
View File

@ -43,8 +43,6 @@ extern struct rt6_info ip6_prohibit_entry;
extern struct rt6_info ip6_blk_hole_entry;
#endif
extern int ip6_rt_gc_interval;
extern void ip6_route_input(struct sk_buff *skb);
extern struct dst_entry * ip6_route_output(struct sock *sk,

8
include/net/netns/ipv6.h
View File

@ -15,6 +15,14 @@ struct netns_sysctl_ipv6 {
#endif
struct inet_frags_ctl frags;
int bindv6only;
int flush_delay;
int ip6_rt_max_size;
int ip6_rt_gc_min_interval;
int ip6_rt_gc_timeout;
int ip6_rt_gc_interval;
int ip6_rt_gc_elasticity;
int ip6_rt_mtu_expires;
int ip6_rt_min_advmss;
};
struct netns_ipv6 {

8
net/ipv6/af_inet6.c
View File

@ -726,6 +726,14 @@ static int inet6_net_init(struct net *net)
net->ipv6.sysctl.frags.low_thresh = 192 * 1024;
net->ipv6.sysctl.frags.timeout = IPV6_FRAG_TIMEOUT;
net->ipv6.sysctl.frags.secret_interval = 10 * 60 * HZ;
net->ipv6.sysctl.flush_delay = 0;
net->ipv6.sysctl.ip6_rt_max_size = 4096;
net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2;
net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ;
net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ;
net->ipv6.sysctl.ip6_rt_gc_elasticity = 9;
net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ;
net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40;
ipv6_frag_sysctl_init(net);
return 0;

14
net/ipv6/ip6_fib.c
View File

@ -681,13 +681,15 @@ static __inline__ void fib6_start_gc(struct rt6_info *rt)
{
if (ip6_fib_timer.expires == 0 &&
(rt->rt6i_flags & (RTF_EXPIRES|RTF_CACHE)))
mod_timer(&ip6_fib_timer, jiffies + ip6_rt_gc_interval);
mod_timer(&ip6_fib_timer, jiffies +
init_net.ipv6.sysctl.ip6_rt_gc_interval);
}
void fib6_force_start_gc(void)
{
if (ip6_fib_timer.expires == 0)
mod_timer(&ip6_fib_timer, jiffies + ip6_rt_gc_interval);
mod_timer(&ip6_fib_timer, jiffies +
init_net.ipv6.sysctl.ip6_rt_gc_interval);
}
/*
@ -1447,7 +1449,8 @@ void fib6_run_gc(unsigned long dummy)
{
if (dummy != ~0UL) {
spin_lock_bh(&fib6_gc_lock);
gc_args.timeout = dummy ? (int)dummy : ip6_rt_gc_interval;
gc_args.timeout = dummy ? (int)dummy :
init_net.ipv6.sysctl.ip6_rt_gc_interval;
} else {
local_bh_disable();
if (!spin_trylock(&fib6_gc_lock)) {
@ -1455,7 +1458,7 @@ void fib6_run_gc(unsigned long dummy)
local_bh_enable();
return;
}
gc_args.timeout = ip6_rt_gc_interval;
gc_args.timeout = init_net.ipv6.sysctl.ip6_rt_gc_interval;
}
gc_args.more = 0;
@ -1463,7 +1466,8 @@ void fib6_run_gc(unsigned long dummy)
fib6_clean_all(fib6_age, 0, NULL);
if (gc_args.more)
mod_timer(&ip6_fib_timer, jiffies + ip6_rt_gc_interval);
mod_timer(&ip6_fib_timer, jiffies +
init_net.ipv6.sysctl.ip6_rt_gc_interval);
else {
del_timer(&ip6_fib_timer);
ip6_fib_timer.expires = 0;

49
net/ipv6/route.c
View File

@ -73,14 +73,6 @@
#define CLONE_OFFLINK_ROUTE 0
static int ip6_rt_max_size = 4096;
static int ip6_rt_gc_min_interval = HZ / 2;
static int ip6_rt_gc_timeout = 60*HZ;
int ip6_rt_gc_interval = 30*HZ;
static int ip6_rt_gc_elasticity = 9;
static int ip6_rt_mtu_expires = 10*60*HZ;
static int ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40;
static struct rt6_info * ip6_rt_copy(struct rt6_info *ort);
static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie);
static struct dst_entry *ip6_negative_advice(struct dst_entry *);
@ -894,8 +886,8 @@ static inline unsigned int ipv6_advmss(unsigned int mtu)
{
mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
if (mtu < ip6_rt_min_advmss)
mtu = ip6_rt_min_advmss;
if (mtu < init_net.ipv6.sysctl.ip6_rt_min_advmss)
mtu = init_net.ipv6.sysctl.ip6_rt_min_advmss;
/*
* Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and
@ -995,19 +987,19 @@ static int ip6_dst_gc(void)
static unsigned long last_gc;
unsigned long now = jiffies;
if (time_after(last_gc + ip6_rt_gc_min_interval, now) &&
atomic_read(&ip6_dst_ops.entries) <= ip6_rt_max_size)
if (time_after(last_gc + init_net.ipv6.sysctl.ip6_rt_gc_min_interval, now) &&
atomic_read(&ip6_dst_ops.entries) <= init_net.ipv6.sysctl.ip6_rt_max_size)
goto out;
expire++;
fib6_run_gc(expire);
last_gc = now;
if (atomic_read(&ip6_dst_ops.entries) < ip6_dst_ops.gc_thresh)
expire = ip6_rt_gc_timeout>>1;
expire = init_net.ipv6.sysctl.ip6_rt_gc_timeout>>1;
out:
expire -= expire>>ip6_rt_gc_elasticity;
return (atomic_read(&ip6_dst_ops.entries) > ip6_rt_max_size);
expire -= expire>>init_net.ipv6.sysctl.ip6_rt_gc_elasticity;
return (atomic_read(&ip6_dst_ops.entries) > init_net.ipv6.sysctl.ip6_rt_max_size);
}
/* Clean host part of a prefix. Not necessary in radix tree,
@ -1513,7 +1505,7 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
rt->u.dst.metrics[RTAX_MTU-1] = pmtu;
if (allfrag)
rt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
dst_set_expires(&rt->u.dst, ip6_rt_mtu_expires);
dst_set_expires(&rt->u.dst, init_net.ipv6.sysctl.ip6_rt_mtu_expires);
rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES;
goto out;
}
@ -1539,7 +1531,7 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
* which is 10 mins. After 10 mins the decreased pmtu is expired
* and detecting PMTU increase will be automatically happened.
*/
dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires);
dst_set_expires(&nrt->u.dst, init_net.ipv6.sysctl.ip6_rt_mtu_expires);
nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;
ip6_ins_rt(nrt);
@ -2395,15 +2387,14 @@ static inline void ipv6_route_proc_fini(struct net *net)
#ifdef CONFIG_SYSCTL
static int flush_delay;
static
int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, struct file * filp,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
int delay = init_net.ipv6.sysctl.flush_delay;
if (write) {
proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
fib6_run_gc(flush_delay <= 0 ? ~0UL : (unsigned long)flush_delay);
fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay);
return 0;
} else
return -EINVAL;
@ -2412,7 +2403,7 @@ int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, struct file * filp,
ctl_table ipv6_route_table_template[] = {
{
.procname = "flush",
.data = &flush_delay,
.data = &init_net.ipv6.sysctl.flush_delay,
.maxlen = sizeof(int),
.mode = 0200,
.proc_handler = &ipv6_sysctl_rtcache_flush
@ -2428,7 +2419,7 @@ ctl_table ipv6_route_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE_MAX_SIZE,
.procname = "max_size",
.data = &ip6_rt_max_size,
.data = &init_net.ipv6.sysctl.ip6_rt_max_size,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
@ -2436,7 +2427,7 @@ ctl_table ipv6_route_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE_GC_MIN_INTERVAL,
.procname = "gc_min_interval",
.data = &ip6_rt_gc_min_interval,
.data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@ -2445,7 +2436,7 @@ ctl_table ipv6_route_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE_GC_TIMEOUT,
.procname = "gc_timeout",
.data = &ip6_rt_gc_timeout,
.data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@ -2454,7 +2445,7 @@ ctl_table ipv6_route_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE_GC_INTERVAL,
.procname = "gc_interval",
.data = &ip6_rt_gc_interval,
.data = &init_net.ipv6.sysctl.ip6_rt_gc_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@ -2463,7 +2454,7 @@ ctl_table ipv6_route_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE_GC_ELASTICITY,
.procname = "gc_elasticity",
.data = &ip6_rt_gc_elasticity,
.data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@ -2472,7 +2463,7 @@ ctl_table ipv6_route_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE_MTU_EXPIRES,
.procname = "mtu_expires",
.data = &ip6_rt_mtu_expires,
.data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@ -2481,7 +2472,7 @@ ctl_table ipv6_route_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE_MIN_ADVMSS,
.procname = "min_adv_mss",
.data = &ip6_rt_min_advmss,
.data = &init_net.ipv6.sysctl.ip6_rt_min_advmss,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@ -2490,7 +2481,7 @@ ctl_table ipv6_route_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS,
.procname = "gc_min_interval_ms",
.data = &ip6_rt_gc_min_interval,
.data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_ms_jiffies,

11
net/ipv6/sysctl_net_ipv6.c
View File

@ -113,7 +113,18 @@ static int ipv6_sysctl_net_init(struct net *net)
if (!ipv6_icmp_table)
goto out_ipv6_route_table;
ipv6_route_table[0].data = &net->ipv6.sysctl.flush_delay;
/* ipv6_route_table[1].data will be handled when we have
routes per namespace */
ipv6_route_table[2].data = &net->ipv6.sysctl.ip6_rt_max_size;
ipv6_route_table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
ipv6_route_table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout;
ipv6_route_table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval;
ipv6_route_table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity;
ipv6_route_table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
ipv6_route_table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
ipv6_table[0].child = ipv6_route_table;
ipv6_table[1].child = ipv6_icmp_table;
ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;