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author | Patrick McHardy <kaber@trash.net> | 2011-01-19 22:51:37 (GMT) |
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committer | Patrick McHardy <kaber@trash.net> | 2011-01-19 22:51:37 (GMT) |
commit | 14f0290ba44de6ed435fea24bba26e7868421c66 (patch) | |
tree | 449d32e4848007e3edbcab14fa8e09fdc66608ed /net/ipv6/netfilter/ip6_tables.c | |
parent | f5c88f56b35599ab9ff2d3398e0153e4cd4a4c82 (diff) | |
parent | a5db219f4cf9f67995eabd53b81a1232c82f5852 (diff) | |
download | linux-fsl-qoriq-14f0290ba44de6ed435fea24bba26e7868421c66.tar.xz |
Merge branch 'master' of /repos/git/net-next-2.6
Diffstat (limited to 'net/ipv6/netfilter/ip6_tables.c')
-rw-r--r-- | net/ipv6/netfilter/ip6_tables.c | 45 |
1 files changed, 14 insertions, 31 deletions
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c index 0c9973a..47b7b8d 100644 --- a/net/ipv6/netfilter/ip6_tables.c +++ b/net/ipv6/netfilter/ip6_tables.c @@ -897,42 +897,25 @@ get_counters(const struct xt_table_info *t, struct ip6t_entry *iter; unsigned int cpu; unsigned int i; - unsigned int curcpu = get_cpu(); - - /* Instead of clearing (by a previous call to memset()) - * the counters and using adds, we set the counters - * with data used by 'current' CPU - * - * Bottom half has to be disabled to prevent deadlock - * if new softirq were to run and call ipt_do_table - */ - local_bh_disable(); - i = 0; - xt_entry_foreach(iter, t->entries[curcpu], t->size) { - SET_COUNTER(counters[i], iter->counters.bcnt, - iter->counters.pcnt); - ++i; - } - local_bh_enable(); - /* Processing counters from other cpus, we can let bottom half enabled, - * (preemption is disabled) - */ for_each_possible_cpu(cpu) { - if (cpu == curcpu) - continue; + seqlock_t *lock = &per_cpu(xt_info_locks, cpu).lock; + i = 0; - local_bh_disable(); - xt_info_wrlock(cpu); xt_entry_foreach(iter, t->entries[cpu], t->size) { - ADD_COUNTER(counters[i], iter->counters.bcnt, - iter->counters.pcnt); + u64 bcnt, pcnt; + unsigned int start; + + do { + start = read_seqbegin(lock); + bcnt = iter->counters.bcnt; + pcnt = iter->counters.pcnt; + } while (read_seqretry(lock, start)); + + ADD_COUNTER(counters[i], bcnt, pcnt); ++i; } - xt_info_wrunlock(cpu); - local_bh_enable(); } - put_cpu(); } static struct xt_counters *alloc_counters(const struct xt_table *table) @@ -945,7 +928,7 @@ static struct xt_counters *alloc_counters(const struct xt_table *table) (other than comefrom, which userspace doesn't care about). */ countersize = sizeof(struct xt_counters) * private->number; - counters = vmalloc(countersize); + counters = vzalloc(countersize); if (counters == NULL) return ERR_PTR(-ENOMEM); @@ -1217,7 +1200,7 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks, struct ip6t_entry *iter; ret = 0; - counters = vmalloc(num_counters * sizeof(struct xt_counters)); + counters = vzalloc(num_counters * sizeof(struct xt_counters)); if (!counters) { ret = -ENOMEM; goto out; |