netdev - [PATCH] netfilter: conntrack: remote a return value of the 'seq_print

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Date:   Mon, 23 Jan 2023 08:19:50 +0000
From:   Gavrilov Ilia <Ilia.Gavrilov@...otecs.ru>
To:     Pablo Neira Ayuso <pablo@...filter.org>
CC:     Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "Joe Perches" <joe@...ches.com>,
        "netfilter-devel@...r.kernel.org" <netfilter-devel@...r.kernel.org>,
        "coreteam@...filter.org" <coreteam@...filter.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "lvc-project@...uxtesting.org" <lvc-project@...uxtesting.org>
Subject: [PATCH] netfilter: conntrack: remote a return value of the
 'seq_print_acct' function.

The static 'seq_print_acct' function always returns 0.

Change the return value to 'void' and remove unnecessary checks.

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

Fixes: 1ca9e41770cb ("netfilter: Remove uses of seq_<foo> return values")
Signed-off-by: Ilia.Gavrilov <Ilia.Gavrilov@...otecs.ru>
---
 net/netfilter/nf_conntrack_standalone.c | 26 ++++++++++---------------
 1 file changed, 10 insertions(+), 16 deletions(-)

diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 0250725e38a4..bee99d4bcf36 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -275,22 +275,18 @@ static const char* l4proto_name(u16 proto)
 	return "unknown";
 }
 
-static unsigned int
+static void
 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
 {
-	struct nf_conn_acct *acct;
-	struct nf_conn_counter *counter;
+	struct nf_conn_acct *acct = nf_conn_acct_find(ct);
 
-	acct = nf_conn_acct_find(ct);
-	if (!acct)
-		return 0;
-
-	counter = acct->counter;
-	seq_printf(s, "packets=%llu bytes=%llu ",
-		   (unsigned long long)atomic64_read(&counter[dir].packets),
-		   (unsigned long long)atomic64_read(&counter[dir].bytes));
+	if (acct) {
+		struct nf_conn_counter *counter = acct->counter;
 
-	return 0;
+		seq_printf(s, "packets=%llu bytes=%llu ",
+			   (unsigned long long)atomic64_read(&counter[dir].packets),
+			   (unsigned long long)atomic64_read(&counter[dir].bytes));
+	}
 }
 
 /* return 0 on success, 1 in case of error */
@@ -342,8 +338,7 @@ static int ct_seq_show(struct seq_file *s, void *v)
 	if (seq_has_overflowed(s))
 		goto release;
 
-	if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
-		goto release;
+	seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL);
 
 	if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
 		seq_puts(s, "[UNREPLIED] ");
@@ -352,8 +347,7 @@ static int ct_seq_show(struct seq_file *s, void *v)
 
 	ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
 
-	if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
-		goto release;
+	seq_print_acct(s, ct, IP_CT_DIR_REPLY);
 
 	if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
 		seq_puts(s, "[HW_OFFLOAD] ");
-- 
2.30.2