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| author | Patrick McHardy <kaber@trash.net> | 2008-01-31 04:37:36 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-31 19:27:52 -0800 |
| commit | c52fbb410b2662a7bbc5cbe5969d73c733151498 (patch) | |
| tree | d449d642b8004a10fa811ad1d0e2af2225788025 /net | |
| parent | 58a3c9bb0c69f8517c2243cd0912b3f87b4f868c (diff) | |
| download | linux-c52fbb410b2662a7bbc5cbe5969d73c733151498.tar.gz linux-c52fbb410b2662a7bbc5cbe5969d73c733151498.tar.bz2 linux-c52fbb410b2662a7bbc5cbe5969d73c733151498.zip | |
[NETFILTER]: nf_conntrack_core: avoid taking nf_conntrack_lock in nf_conntrack_alter_reply
The conntrack is unconfirmed, so we have an exclusive reference, which
means that the write_lock is definitely unneeded. A read_lock used to
be needed for the helper lookup, but since we're using RCU for helpers
now rcu_read_lock is enough.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_conntrack_core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index aa042c489685..10256079e634 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -729,7 +729,6 @@ void nf_conntrack_alter_reply(struct nf_conn *ct, struct nf_conn_help *help = nfct_help(ct); struct nf_conntrack_helper *helper; - write_lock_bh(&nf_conntrack_lock); /* Should be unconfirmed, so not in hash table yet */ NF_CT_ASSERT(!nf_ct_is_confirmed(ct)); @@ -738,8 +737,9 @@ void nf_conntrack_alter_reply(struct nf_conn *ct, ct->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply; if (ct->master || (help && help->expecting != 0)) - goto out; + return; + rcu_read_lock(); helper = __nf_ct_helper_find(newreply); if (helper == NULL) { if (help) @@ -757,7 +757,7 @@ void nf_conntrack_alter_reply(struct nf_conn *ct, rcu_assign_pointer(help->helper, helper); out: - write_unlock_bh(&nf_conntrack_lock); + rcu_read_unlock(); } EXPORT_SYMBOL_GPL(nf_conntrack_alter_reply); |