diff options
| author | Liping Zhang <liping.zhang@spreadtrum.com> | 2016-07-03 05:18:45 (GMT) |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-07-11 09:44:34 (GMT) |
| commit | 8786a9716d028083f56f944996883f7d1a05919e (patch) | |
| tree | 7c2691ec8ade17c7e90ff1d8a3a99bc23f35861e /net | |
| parent | 474803d37e7fb6291d22cb964014afe457ba5212 (diff) | |
| download | linux-8786a9716d028083f56f944996883f7d1a05919e.tar.xz | |
netfilter: nf_ct_helper: unlink helper again when hash resize happen
From: Liping Zhang <liping.zhang@spreadtrum.com>
Similar to ctnl_untimeout, when hash resize happened, we should try
to do unhelp from the 0# bucket again.
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_conntrack_helper.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c index 3a1a88b..a4294e9 100644 --- a/net/netfilter/nf_conntrack_helper.c +++ b/net/netfilter/nf_conntrack_helper.c @@ -409,6 +409,8 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper *me) struct nf_conntrack_expect *exp; const struct hlist_node *next; const struct hlist_nulls_node *nn; + unsigned int last_hsize; + spinlock_t *lock; struct net *net; unsigned int i; @@ -446,13 +448,18 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper *me) rtnl_unlock(); local_bh_disable(); - for (i = 0; i < nf_conntrack_htable_size; i++) { - nf_conntrack_lock(&nf_conntrack_locks[i % CONNTRACK_LOCKS]); - if (i < nf_conntrack_htable_size) { - hlist_nulls_for_each_entry(h, nn, &nf_conntrack_hash[i], hnnode) - unhelp(h, me); +restart: + last_hsize = nf_conntrack_htable_size; + for (i = 0; i < last_hsize; i++) { + lock = &nf_conntrack_locks[i % CONNTRACK_LOCKS]; + nf_conntrack_lock(lock); + if (last_hsize != nf_conntrack_htable_size) { + spin_unlock(lock); + goto restart; } - spin_unlock(&nf_conntrack_locks[i % CONNTRACK_LOCKS]); + hlist_nulls_for_each_entry(h, nn, &nf_conntrack_hash[i], hnnode) + unhelp(h, me); + spin_unlock(lock); } local_bh_enable(); } |