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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 1/5] netfilter: xt_physdev: Fix spurious error message in physdev_mt_check
Date: Fri, 30 Aug 2019 14:07:00 +0200
Message-ID: <20190830120704.6147-2-pablo@netfilter.org> (raw)
In-Reply-To: <20190830120704.6147-1-pablo@netfilter.org>

From: Todd Seidelmann <tseidelmann@linode.com>

Simplify the check in physdev_mt_check() to emit an error message
only when passed an invalid chain (ie, NF_INET_LOCAL_OUT).
This avoids cluttering up the log with errors against valid rules.

For large/heavily modified rulesets, current behavior can quickly
overwhelm the ring buffer, because this function gets called on
every change, regardless of the rule that was changed.

Signed-off-by: Todd Seidelmann <tseidelmann@linode.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/xt_physdev.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/netfilter/xt_physdev.c b/net/netfilter/xt_physdev.c
index ead7c6022208..b92b22ce8abd 100644
--- a/net/netfilter/xt_physdev.c
+++ b/net/netfilter/xt_physdev.c
@@ -101,11 +101,9 @@ static int physdev_mt_check(const struct xt_mtchk_param *par)
 	if (info->bitmask & (XT_PHYSDEV_OP_OUT | XT_PHYSDEV_OP_ISOUT) &&
 	    (!(info->bitmask & XT_PHYSDEV_OP_BRIDGED) ||
 	     info->invert & XT_PHYSDEV_OP_BRIDGED) &&
-	    par->hook_mask & ((1 << NF_INET_LOCAL_OUT) |
-	    (1 << NF_INET_FORWARD) | (1 << NF_INET_POST_ROUTING))) {
+	    par->hook_mask & (1 << NF_INET_LOCAL_OUT)) {
 		pr_info_ratelimited("--physdev-out and --physdev-is-out only supported in the FORWARD and POSTROUTING chains with bridged traffic\n");
-		if (par->hook_mask & (1 << NF_INET_LOCAL_OUT))
-			return -EINVAL;
+		return -EINVAL;
 	}
 
 	if (!brnf_probed) {
-- 
2.11.0


  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-30 12:06 [PATCH 0/5] Netfilter fixes for net Pablo Neira Ayuso
2019-08-30 12:07 ` Pablo Neira Ayuso [this message]
2019-08-30 12:07 ` [PATCH 2/5] netfilter: nf_conntrack_ftp: Fix debug output Pablo Neira Ayuso
2019-08-30 12:07 ` [PATCH 3/5] netfilter: conntrack: make sysctls per-namespace again Pablo Neira Ayuso
2019-08-30 12:07 ` [PATCH 4/5] netfilter: nf_flow_table: clear skb tstamp before xmit Pablo Neira Ayuso
2019-08-30 12:07 ` [PATCH 5/5] netfilter: nft_meta_bridge: Fix get NFT_META_BRI_IIFVPROTO in network byteorder Pablo Neira Ayuso
2019-08-31  0:52 ` [PATCH 0/5] Netfilter fixes for net David Miller

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