diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-12-14 14:45:20 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2011-12-18 01:19:19 +0100 |
| commit | b3e0bfa71b1db9d7a9fbea6965867784fd00ca3c (patch) | |
| tree | 2b8463810415b36edcb0e96b17f7a86047c1bfd5 /net/netfilter/nf_conntrack_netlink.c | |
| parent | 76ad94fc5df865e34e09406614f29951a046394a (diff) | |
netfilter: nf_conntrack: use atomic64 for accounting counters
We can use atomic64_t infrastructure to avoid taking a spinlock in fast
path, and remove inaccuracies while reading values in
ctnetlink_dump_counters() and connbytes_mt() on 32bit arches.
Suggested by Pablo.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_conntrack_netlink.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_netlink.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index ef21b221f036..a36e6553ddb3 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -219,9 +219,9 @@ ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, goto nla_put_failure; NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, - cpu_to_be64(acct[dir].packets)); + cpu_to_be64(atomic64_read(&acct[dir].packets))); NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, - cpu_to_be64(acct[dir].bytes)); + cpu_to_be64(atomic64_read(&acct[dir].bytes))); nla_nest_end(skb, nest_count); @@ -720,8 +720,12 @@ restart: struct nf_conn_counter *acct; acct = nf_conn_acct_find(ct); - if (acct) - memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); + if (acct) { + atomic64_set(&acct[IP_CT_DIR_ORIGINAL].bytes, 0); + atomic64_set(&acct[IP_CT_DIR_ORIGINAL].packets, 0); + atomic64_set(&acct[IP_CT_DIR_REPLY].bytes, 0); + atomic64_set(&acct[IP_CT_DIR_REPLY].packets, 0); + } } } if (cb->args[1]) { |