From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Subject: [PATCH nf-next 3/3] netfilter: nf_tables_offload: unbind if multi-device binding fails
Date: Thu, 24 Oct 2019 11:15:00 +0200 [thread overview]
Message-ID: <20191024091500.2074-3-pablo@netfilter.org> (raw)
In-Reply-To: <20191024091500.2074-1-pablo@netfilter.org>
nft_flow_block_chain() needs to unbind in case of error when performing
the multi-device binding.
Fixes: d54725cd11a5 ("netfilter: nf_tables: support for multiple devices per netdev hook")
Reported-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/nf_tables_offload.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nf_tables_offload.c b/net/netfilter/nf_tables_offload.c
index d51728affa1c..4e0625cce647 100644
--- a/net/netfilter/nf_tables_offload.c
+++ b/net/netfilter/nf_tables_offload.c
@@ -336,7 +336,7 @@ static int nft_flow_block_chain(struct nft_base_chain *basechain,
{
struct net_device *dev;
struct nft_hook *hook;
- int err;
+ int err, i = 0;
list_for_each_entry(hook, &basechain->hook_list, list) {
dev = hook->ops.dev;
@@ -344,11 +344,26 @@ static int nft_flow_block_chain(struct nft_base_chain *basechain,
continue;
err = nft_chain_offload_cmd(basechain, dev, cmd);
- if (err < 0)
+ if (err < 0 && cmd == FLOW_BLOCK_BIND) {
+ if (!this_dev)
+ goto err_flow_block;
+
return err;
+ }
+ i++;
}
return 0;
+
+err_flow_block:
+ list_for_each_entry(hook, &basechain->hook_list, list) {
+ if (i-- <= 0)
+ break;
+
+ dev = hook->ops.dev;
+ nft_chain_offload_cmd(basechain, dev, FLOW_BLOCK_UNBIND);
+ }
+ return err;
}
static int nft_flow_offload_chain(struct nft_chain *chain, u8 *ppolicy,
--
2.11.0
prev parent reply other threads:[~2019-10-24 9:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 9:14 [PATCH nf-next 1/3] netfilter: nf_tables_offload: add nft_chain_offload_cmd() Pablo Neira Ayuso
2019-10-24 9:14 ` [PATCH nf-next 2/3] netfilter: nf_tables_offload: add nft_flow_block_offload_init() Pablo Neira Ayuso
2019-10-24 9:15 ` Pablo Neira Ayuso [this message]
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