lisa/android_kernel_xiaomi_sm8350
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Revert "ipv6: make ip6_rt_gc_expire an atomic_t"

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This reverts commit 66b3025202 which is
commit 9cb7c013420f98fa6fd12fc6a5dc055170c108db upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: Idad46376e176f54a1d6781bdb432131bed7844f2
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman 2024-01-16 15:58:01 +00:00 committed by Treehugger Robot
parent fa82780056
commit 5826ec2af1
2 changed files with 7 additions and 8 deletions
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4
include/net/netns/ipv6.h
View File

@ -78,8 +78,8 @@ struct netns_ipv6 {
struct dst_ops ip6_dst_ops;
rwlock_t fib6_walker_lock;
spinlock_t fib6_gc_lock;
atomic_t ip6_rt_gc_expire;
unsigned long ip6_rt_last_gc;
unsigned int ip6_rt_gc_expire;
unsigned long ip6_rt_last_gc;
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
unsigned int fib6_rules_require_fldissect;
bool fib6_has_custom_rules;

11
net/ipv6/route.c
View File

@ -3215,7 +3215,6 @@ static int ip6_dst_gc(struct dst_ops *ops)
int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity;
int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout;
unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc;
unsigned int val;
int entries;
entries = dst_entries_get_fast(ops);
@ -3226,13 +3225,13 @@ static int ip6_dst_gc(struct dst_ops *ops)
entries <= rt_max_size)
goto out;
fib6_run_gc(atomic_inc_return(&net->ipv6.ip6_rt_gc_expire), net, true);
net->ipv6.ip6_rt_gc_expire++;
fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net, true);
entries = dst_entries_get_slow(ops);
if (entries < ops->gc_thresh)
atomic_set(&net->ipv6.ip6_rt_gc_expire, rt_gc_timeout >> 1);
net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1;
out:
val = atomic_read(&net->ipv6.ip6_rt_gc_expire);
atomic_set(&net->ipv6.ip6_rt_gc_expire, val - (val >> rt_elasticity));
net->ipv6.ip6_rt_gc_expire -= net->ipv6.ip6_rt_gc_expire>>rt_elasticity;
return entries > rt_max_size;
}
@ -6288,7 +6287,7 @@ static int __net_init ip6_route_net_init(struct net *net)
net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40;
net->ipv6.sysctl.skip_notify_on_dev_down = 0;
atomic_set(&net->ipv6.ip6_rt_gc_expire, 30*HZ);
net->ipv6.ip6_rt_gc_expire = 30*HZ;
ret = 0;
out: