diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2014-10-06 17:58:37 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-10-07 04:02:30 (GMT) |
| commit | 812918c464eca0e8c145f975932ca5020e9c05cb (patch) | |
| tree | f93555164f70bf5f7f14eed06b2571bfb1fc2c2d /net/ipv6/ip6_fib.c | |
| parent | c8c4d42a6b46ea9f81816c47ac8d6ae25cf533fc (diff) | |
| download | linux-812918c464eca0e8c145f975932ca5020e9c05cb.tar.xz | |
ipv6: make fib6 serial number per namespace
Try to reduce number of possible fn_sernum mutation by constraining them
to their namespace.
Also remove rt_genid which I forgot to remove in 705f1c869d577c ("ipv6:
remove rt6i_genid").
Cc: YOSHIFUJI Hideaki <hideaki@yoshifuji.org>
Cc: Martin Lau <kafai@fb.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_fib.c')
| -rw-r--r-- | net/ipv6/ip6_fib.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index be9cb09..6f9beb1 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -74,8 +74,6 @@ static int fib6_walk_continue(struct fib6_walker *w); * result of redirects, path MTU changes, etc. */ -static atomic_t rt_sernum = ATOMIC_INIT(1); - static void fib6_gc_timer_cb(unsigned long arg); static LIST_HEAD(fib6_walkers); @@ -95,14 +93,15 @@ static void fib6_walker_unlink(struct fib6_walker *w) write_unlock_bh(&fib6_walker_lock); } -static int fib6_new_sernum(void) +static int fib6_new_sernum(struct net *net) { int new, old; do { - old = atomic_read(&rt_sernum); + old = atomic_read(&net->ipv6.fib6_sernum); new = old < INT_MAX ? old + 1 : 1; - } while (atomic_cmpxchg(&rt_sernum, old, new) != old); + } while (atomic_cmpxchg(&net->ipv6.fib6_sernum, + old, new) != old); return new; } @@ -841,7 +840,7 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info, int err = -ENOMEM; int allow_create = 1; int replace_required = 0; - int sernum = fib6_new_sernum(); + int sernum = fib6_new_sernum(info->nl_net); if (info->nlh) { if (!(info->nlh->nlmsg_flags & NLM_F_CREATE)) @@ -1612,7 +1611,7 @@ static int fib6_update_sernum(struct rt6_info *rt, void *arg) static void fib6_flush_trees(struct net *net) { - int new_sernum = fib6_new_sernum(); + int new_sernum = fib6_new_sernum(net); fib6_clean_all(net, fib6_update_sernum, &new_sernum); } |