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Date: Tue, 24 Aug 2021 08:42:15 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: CGEL <cgel.zte@...il.com>, Alexei Starovoitov <ast@...nel.org>
Cc: Daniel Borkmann <daniel@...earbox.net>,
Jakub Kicinski <kuba@...nel.org>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Yonghong Song <yhs@...com>, netdev@...r.kernel.org,
linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
Jing Yangyang <jing.yangyang@....com.cn>,
Zeal Robot <zealci@....com.cn>,
Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH linux-next] tools:test_xdp_noinline: fix boolreturn.cocci
warnings
On 8/24/21 12:55 AM, CGEL wrote:
> From: Jing Yangyang <jing.yangyang@....com.cn>
>
> Return statements in functions returning bool should use true/false
> instead of 1/0.
>
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Jing Yangyang <jing.yangyang@....com.cn>
> ---
> .../selftests/bpf/progs/test_xdp_noinline.c | 42 +++++++++++-----------
> 1 file changed, 21 insertions(+), 21 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
> index 3a67921..37075f8 100644
> --- a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
> +++ b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
> @@ -239,7 +239,7 @@ bool parse_udp(void *data, void *data_end,
> udp = data + off;
>
> if (udp + 1 > data_end)
> - return 0;
> + return false;
> if (!is_icmp) {
> pckt->flow.port16[0] = udp->source;
> pckt->flow.port16[1] = udp->dest;
> @@ -247,7 +247,7 @@ bool parse_udp(void *data, void *data_end,
> pckt->flow.port16[0] = udp->dest;
> pckt->flow.port16[1] = udp->source;
> }
> - return 1;
> + return true;
> }
>
> static __attribute__ ((noinline))
> @@ -261,7 +261,7 @@ bool parse_tcp(void *data, void *data_end,
>
> tcp = data + off;
> if (tcp + 1 > data_end)
> - return 0;
> + return false;
> if (tcp->syn)
> pckt->flags |= (1 << 1);
> if (!is_icmp) {
> @@ -271,7 +271,7 @@ bool parse_tcp(void *data, void *data_end,
> pckt->flow.port16[0] = tcp->dest;
> pckt->flow.port16[1] = tcp->source;
> }
> - return 1;
> + return true;
> }
>
> static __attribute__ ((noinline))
> @@ -287,7 +287,7 @@ bool encap_v6(struct xdp_md *xdp, struct ctl_value *cval,
> void *data;
>
> if (bpf_xdp_adjust_head(xdp, 0 - (int)sizeof(struct ipv6hdr)))
> - return 0;
> + return false;
> data = (void *)(long)xdp->data;
> data_end = (void *)(long)xdp->data_end;
> new_eth = data;
> @@ -295,7 +295,7 @@ bool encap_v6(struct xdp_md *xdp, struct ctl_value *cval,
> old_eth = data + sizeof(struct ipv6hdr);
> if (new_eth + 1 > data_end ||
> old_eth + 1 > data_end || ip6h + 1 > data_end)
> - return 0;
> + return false;
> memcpy(new_eth->eth_dest, cval->mac, 6);
> memcpy(new_eth->eth_source, old_eth->eth_dest, 6);
> new_eth->eth_proto = 56710;
> @@ -314,7 +314,7 @@ bool encap_v6(struct xdp_md *xdp, struct ctl_value *cval,
> ip6h->saddr.in6_u.u6_addr32[2] = 3;
> ip6h->saddr.in6_u.u6_addr32[3] = ip_suffix;
> memcpy(ip6h->daddr.in6_u.u6_addr32, dst->dstv6, 16);
> - return 1;
> + return true;
> }
>
> static __attribute__ ((noinline))
> @@ -335,7 +335,7 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval,
> ip_suffix <<= 15;
> ip_suffix ^= pckt->flow.src;
> if (bpf_xdp_adjust_head(xdp, 0 - (int)sizeof(struct iphdr)))
> - return 0;
> + return false;
> data = (void *)(long)xdp->data;
> data_end = (void *)(long)xdp->data_end;
> new_eth = data;
> @@ -343,7 +343,7 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval,
> old_eth = data + sizeof(struct iphdr);
> if (new_eth + 1 > data_end ||
> old_eth + 1 > data_end || iph + 1 > data_end)
> - return 0;
> + return false;
> memcpy(new_eth->eth_dest, cval->mac, 6);
> memcpy(new_eth->eth_source, old_eth->eth_dest, 6);
> new_eth->eth_proto = 8;
> @@ -367,8 +367,8 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval,
> csum += *next_iph_u16++;
> iph->check = ~((csum & 0xffff) + (csum >> 16));
> if (bpf_xdp_adjust_head(xdp, (int)sizeof(struct iphdr)))
> - return 0;
> - return 1;
> + return false;
> + return true;
> }
>
> static __attribute__ ((noinline))
> @@ -386,10 +386,10 @@ bool decap_v6(struct xdp_md *xdp, void **data, void **data_end, bool inner_v4)
> else
> new_eth->eth_proto = 56710;
> if (bpf_xdp_adjust_head(xdp, (int)sizeof(struct ipv6hdr)))
> - return 0;
> + return false;
> *data = (void *)(long)xdp->data;
> *data_end = (void *)(long)xdp->data_end;
> - return 1;
> + return true;
> }
>
> static __attribute__ ((noinline))
> @@ -404,10 +404,10 @@ bool decap_v4(struct xdp_md *xdp, void **data, void **data_end)
> memcpy(new_eth->eth_dest, old_eth->eth_dest, 6);
> new_eth->eth_proto = 8;
> if (bpf_xdp_adjust_head(xdp, (int)sizeof(struct iphdr)))
> - return 0;
> + return false;
> *data = (void *)(long)xdp->data;
> *data_end = (void *)(long)xdp->data_end;
> - return 1;
> + return true;
> }
>
> static __attribute__ ((noinline))
> @@ -564,22 +564,22 @@ static bool get_packet_dst(struct real_definition **real,
> hash = get_packet_hash(pckt, hash_16bytes);
> if (hash != 0x358459b7 /* jhash of ipv4 packet */ &&
> hash != 0x2f4bc6bb /* jhash of ipv6 packet */)
> - return 0;
> + return false;
> key = 2 * vip_info->vip_num + hash % 2;
> real_pos = bpf_map_lookup_elem(&ch_rings, &key);
> if (!real_pos)
> - return 0;
> + return false;
> key = *real_pos;
> *real = bpf_map_lookup_elem(&reals, &key);
> if (!(*real))
> - return 0;
> + return false;
> if (!(vip_info->flags & (1 << 1))) {
> __u32 conn_rate_key = 512 + 2;
> struct lb_stats *conn_rate_stats =
> bpf_map_lookup_elem(&stats, &conn_rate_key);
>
> if (!conn_rate_stats)
> - return 1;
> + return true;
> cur_time = bpf_ktime_get_ns();
> if ((cur_time - conn_rate_stats->v2) >> 32 > 0xffFFFF) {
> conn_rate_stats->v1 = 1;
> @@ -587,14 +587,14 @@ static bool get_packet_dst(struct real_definition **real,
> } else {
> conn_rate_stats->v1 += 1;
> if (conn_rate_stats->v1 >= 1)
> - return 1;
> + return true;
> }
> if (pckt->flow.proto == IPPROTO_UDP)
> new_dst_lru.atime = cur_time;
> new_dst_lru.pos = key;
> bpf_map_update_elem(lru_map, &pckt->flow, &new_dst_lru, 0);
> }
> - return 1;
> + return true;
> }
>
> __attribute__ ((noinline))
>
We can't accept this patch. The from and Signed-off-by don't match.
thanks,
-- Shuah
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