linux-kernel - [PATCH] selftests/bpf: Fix sockopt selftest failure on powerpc

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Message-ID: <20250311084647.3686544-1-skb99@linux.ibm.com>
Date: Tue, 11 Mar 2025 14:16:47 +0530
From: Saket Kumar Bhaskar <skb99@...ux.ibm.com>
To: bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: ast@...nel.org, hbathini@...ux.ibm.com, andrii@...nel.org,
        daniel@...earbox.net, mykolal@...com, martin.lau@...ux.dev,
        song@...nel.org, yonghong.song@...ux.dev, john.fastabend@...il.com,
        kpsingh@...nel.org, sdf@...ichev.me, haoluo@...gle.com,
        jolsa@...nel.org, shuah@...nel.org, miaxu@...a.com
Subject: [PATCH] selftests/bpf: Fix sockopt selftest failure on powerpc

The SO_RCVLOWAT option is defined as 18 in the selftest header,
which matches the generic definition. However, on powerpc,
SO_RCVLOWAT is defined as 16. This discrepancy causes
sol_socket_sockopt() to fail with the default switch case on powerpc.

This commit fixes by defining SO_RCVLOWAT as 16 for powerpc.

Signed-off-by: Saket Kumar Bhaskar <skb99@...ux.ibm.com>
---
 tools/testing/selftests/bpf/progs/bpf_tracing_net.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h
index 59843b430f76..bcd44d5018bf 100644
--- a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h
+++ b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h
@@ -15,7 +15,11 @@
 #define SO_KEEPALIVE		9
 #define SO_PRIORITY		12
 #define SO_REUSEPORT		15
+#if defined(__TARGET_ARCH_powerpc)
+#define SO_RCVLOWAT		16
+#else
 #define SO_RCVLOWAT		18
+#endif
 #define SO_BINDTODEVICE		25
 #define SO_MARK			36
 #define SO_MAX_PACING_RATE	47
-- 
2.43.5