From 5b7c931dff03621ae7ac524c4fa280d4e5f187a4 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Mon, 3 Mar 2008 23:28:58 -0800 Subject: [PATCH] [NETNS][IPV6] ip6_fib - add net to gc timer parameter The fib tables are now relative to the network namespace. When the garbage collector timer expires, we must have a network namespace parameter in order to retrieve the tables. For now this is the init_net, but we should be able to have a timer per namespace and use the timer callback parameter to pass the network namespace from the expired timer. The timer callback, fib6_run_gc, is actually used to be called synchronously by some functions and asynchronously when the timer expires. When the timer expires, the delay specified for fib6_run_gc parameter is always zero. So, I changed fib6_run_gc to not be a timer callback but a function called by the timer callback and I added a timer callback where its work is just to retrieve from the data arg of the timer the network namespace and call fib6_run_gc with zero expiring time and the network namespace parameters. That makes the code cleaner for the fib6_run_gc callers. Signed-off-by: Daniel Lezcano Signed-off-by: Benjamin Thery Signed-off-by: David S. Miller --- include/net/ip6_fib.h | 3 ++- net/ipv6/ip6_fib.c | 24 ++++++++++++++++-------- net/ipv6/ndisc.c | 5 +++-- net/ipv6/route.c | 8 +++++--- 4 files changed, 26 insertions(+), 14 deletions(-) diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h index e54075d902db..fae267f65341 100644 --- a/include/net/ip6_fib.h +++ b/include/net/ip6_fib.h @@ -209,7 +209,8 @@ extern int fib6_del(struct rt6_info *rt, extern void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info); -extern void fib6_run_gc(unsigned long dummy); +extern void fib6_run_gc(unsigned long expires, + struct net *net); extern void fib6_gc_cleanup(void); diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 0f9dc81f0e61..9b1c232a29ee 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -93,7 +93,10 @@ static int fib6_walk_continue(struct fib6_walker_t *w); static __u32 rt_sernum; -static DEFINE_TIMER(ip6_fib_timer, fib6_run_gc, 0, 0); +static void fib6_gc_timer_cb(unsigned long arg); + +static DEFINE_TIMER(ip6_fib_timer, fib6_gc_timer_cb, 0, + (unsigned long)&init_net); static struct fib6_walker_t fib6_walker_list = { .prev = &fib6_walker_list, @@ -1432,12 +1435,12 @@ static int fib6_age(struct rt6_info *rt, void *arg) static DEFINE_SPINLOCK(fib6_gc_lock); -void fib6_run_gc(unsigned long dummy) +void fib6_run_gc(unsigned long expires, struct net *net) { - if (dummy != ~0UL) { + if (expires != ~0UL) { spin_lock_bh(&fib6_gc_lock); - gc_args.timeout = dummy ? (int)dummy : - init_net.ipv6.sysctl.ip6_rt_gc_interval; + gc_args.timeout = expires ? (int)expires : + net->ipv6.sysctl.ip6_rt_gc_interval; } else { local_bh_disable(); if (!spin_trylock(&fib6_gc_lock)) { @@ -1445,17 +1448,17 @@ void fib6_run_gc(unsigned long dummy) local_bh_enable(); return; } - gc_args.timeout = init_net.ipv6.sysctl.ip6_rt_gc_interval; + gc_args.timeout = net->ipv6.sysctl.ip6_rt_gc_interval; } gc_args.more = 0; icmp6_dst_gc(&gc_args.more); - fib6_clean_all(&init_net, fib6_age, 0, NULL); + fib6_clean_all(net, fib6_age, 0, NULL); if (gc_args.more) mod_timer(&ip6_fib_timer, jiffies + - init_net.ipv6.sysctl.ip6_rt_gc_interval); + net->ipv6.sysctl.ip6_rt_gc_interval); else { del_timer(&ip6_fib_timer); ip6_fib_timer.expires = 0; @@ -1463,6 +1466,11 @@ void fib6_run_gc(unsigned long dummy) spin_unlock_bh(&fib6_gc_lock); } +static void fib6_gc_timer_cb(unsigned long arg) +{ + fib6_run_gc(0, (struct net *)arg); +} + static int fib6_net_init(struct net *net) { int ret; diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index eb322959a3e1..f1c95125100d 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1598,6 +1598,7 @@ int ndisc_rcv(struct sk_buff *skb) static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = ptr; + struct net *net = dev->nd_net; if (dev->nd_net != &init_net) return NOTIFY_DONE; @@ -1605,11 +1606,11 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, switch (event) { case NETDEV_CHANGEADDR: neigh_changeaddr(&nd_tbl, dev); - fib6_run_gc(~0UL); + fib6_run_gc(~0UL, net); break; case NETDEV_DOWN: neigh_ifdown(&nd_tbl, dev); - fib6_run_gc(~0UL); + fib6_run_gc(~0UL, net); break; default: break; diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 2e6da2afd948..fd44721abebb 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #include #include @@ -995,7 +996,7 @@ static int ip6_dst_gc(struct dst_ops *ops) goto out; expire++; - fib6_run_gc(expire); + fib6_run_gc(expire, &init_net); last_gc = now; if (atomic_read(&ip6_dst_ops.entries) < ip6_dst_ops.gc_thresh) expire = init_net.ipv6.sysctl.ip6_rt_gc_timeout>>1; @@ -2413,10 +2414,11 @@ 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; + struct net *net = current->nsproxy->net_ns; + int delay = net->ipv6.sysctl.flush_delay; if (write) { proc_dointvec(ctl, write, filp, buffer, lenp, ppos); - fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay); + fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay, net); return 0; } else return -EINVAL; -- 2.30.2