linux-kernel - [PATCH] selftests: net: fix array

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Message-Id: <20220316092858.9398-1-guozhengkui@vivo.com>
Date:   Wed, 16 Mar 2022 17:28:57 +0800
From:   Guo Zhengkui <guozhengkui@...o.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Shuah Khan <shuah@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        netdev@...r.kernel.org (open list:NETWORKING [GENERAL]),
        linux-kselftest@...r.kernel.org (open list:KERNEL SELFTEST FRAMEWORK),
        linux-kernel@...r.kernel.org (open list),
        bpf@...r.kernel.org (open list:BPF (Safe dynamic programs and tools))
Cc:     zhengkui_guo@...look.com, Guo Zhengkui <guozhengkui@...o.com>
Subject: [PATCH] selftests: net: fix array_size.cocci warning

Fix array_size.cocci warning in tools/testing/selftests/net.

Use `ARRAY_SIZE(arr)` instead of forms like `sizeof(arr)/sizeof(arr[0])`.

It has been tested with gcc (Debian 8.3.0-6) 8.3.0.

Signed-off-by: Guo Zhengkui <guozhengkui@...o.com>
---
 tools/testing/selftests/net/cmsg_sender.c  | 4 +++-
 tools/testing/selftests/net/psock_fanout.c | 5 +++--
 tools/testing/selftests/net/toeplitz.c     | 6 ++++--
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/net/cmsg_sender.c b/tools/testing/selftests/net/cmsg_sender.c
index aed7845c08a8..bc2162909a1a 100644
--- a/tools/testing/selftests/net/cmsg_sender.c
+++ b/tools/testing/selftests/net/cmsg_sender.c
@@ -16,6 +16,8 @@
 #include <linux/udp.h>
 #include <sys/socket.h>
 
+#include "../kselftest.h"
+
 enum {
 	ERN_SUCCESS = 0,
 	/* Well defined errors, callers may depend on these */
@@ -318,7 +320,7 @@ static const char *cs_ts_info2str(unsigned int info)
 		[SCM_TSTAMP_ACK]	= "ACK",
 	};
 
-	if (info < sizeof(names) / sizeof(names[0]))
+	if (info < ARRAY_SIZE(names))
 		return names[info];
 	return "unknown";
 }
diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
index 3653d6468c67..1a736f700be4 100644
--- a/tools/testing/selftests/net/psock_fanout.c
+++ b/tools/testing/selftests/net/psock_fanout.c
@@ -53,6 +53,7 @@
 #include <unistd.h>
 
 #include "psock_lib.h"
+#include "../kselftest.h"
 
 #define RING_NUM_FRAMES			20
 
@@ -117,7 +118,7 @@ static void sock_fanout_set_cbpf(int fd)
 	struct sock_fprog bpf_prog;
 
 	bpf_prog.filter = bpf_filter;
-	bpf_prog.len = sizeof(bpf_filter) / sizeof(struct sock_filter);
+	bpf_prog.len = ARRAY_SIZE(bpf_filter);
 
 	if (setsockopt(fd, SOL_PACKET, PACKET_FANOUT_DATA, &bpf_prog,
 		       sizeof(bpf_prog))) {
@@ -162,7 +163,7 @@ static void sock_fanout_set_ebpf(int fd)
 	memset(&attr, 0, sizeof(attr));
 	attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
 	attr.insns = (unsigned long) prog;
-	attr.insn_cnt = sizeof(prog) / sizeof(prog[0]);
+	attr.insn_cnt = ARRAY_SIZE(prog);
 	attr.license = (unsigned long) "GPL";
 	attr.log_buf = (unsigned long) log_buf,
 	attr.log_size = sizeof(log_buf),
diff --git a/tools/testing/selftests/net/toeplitz.c b/tools/testing/selftests/net/toeplitz.c
index c5489341cfb8..90026a27eac0 100644
--- a/tools/testing/selftests/net/toeplitz.c
+++ b/tools/testing/selftests/net/toeplitz.c
@@ -52,6 +52,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include "../kselftest.h"
+
 #define TOEPLITZ_KEY_MIN_LEN	40
 #define TOEPLITZ_KEY_MAX_LEN	60
 
@@ -295,7 +297,7 @@ static void __set_filter(int fd, int off_proto, uint8_t proto, int off_dport)
 	struct sock_fprog prog = {};
 
 	prog.filter = filter;
-	prog.len = sizeof(filter) / sizeof(struct sock_filter);
+	prog.len = ARRAY_SIZE(filter);
 	if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &prog, sizeof(prog)))
 		error(1, errno, "setsockopt filter");
 }
@@ -324,7 +326,7 @@ static void set_filter_null(int fd)
 	struct sock_fprog prog = {};
 
 	prog.filter = filter;
-	prog.len = sizeof(filter) / sizeof(struct sock_filter);
+	prog.len = ARRAY_SIZE(filter);
 	if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &prog, sizeof(prog)))
 		error(1, errno, "setsockopt filter");
 }
-- 
2.20.1