diff mbox series

[bpf-next] selftests/bpf: Fix a btf_dump selftest failure

Message ID 20240802185434.1749056-1-yonghong.song@linux.dev (mailing list archive)
State Accepted
Commit 3d650ab5e7d9c4d7306e4c116f8aa9980bf13295
Delegated to: BPF
Headers show
Series [bpf-next] selftests/bpf: Fix a btf_dump selftest failure | expand

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netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 7 this patch: 7
netdev/build_tools success Errors and warnings before: 10 this patch: 10
netdev/cc_maintainers warning 12 maintainers not CCed: kpsingh@kernel.org shuah@kernel.org haoluo@google.com john.fastabend@gmail.com jolsa@kernel.org linux-kselftest@vger.kernel.org martin.lau@linux.dev mykolal@fb.com song@kernel.org eddyz87@gmail.com sdf@fomichev.me alan.maguire@oracle.com
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netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
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netdev/checkpatch warning WARNING: Unknown commit id '94ede2a3e913', maybe rebased or not pulled? WARNING: line length of 89 exceeds 80 columns
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netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Yonghong Song Aug. 2, 2024, 6:54 p.m. UTC 
Jakub reported bpf selftest "btf_dump" failure after forwarding to
v6.11-rc1 with netdev.
  Error: #33 btf_dump
  Error: #33/15 btf_dump/btf_dump: var_data
    btf_dump_data:FAIL:find type id unexpected find type id: actual -2 < expected 0

The reason for the failure is due to
  commit 94ede2a3e913 ("profiling: remove stale percpu flip buffer variables")
where percpu static variable "cpu_profile_flip" is removed.

Let us replace "cpu_profile_flip" with a variable in bpf subsystem
so whenever that variable gets deleted or renamed, we can detect the
failure immediately. In this case, I picked a static percpu variable
"bpf_cgrp_storage_busy" which is defined in kernel/bpf/bpf_cgrp_storage.c.

Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
---
 tools/testing/selftests/bpf/prog_tests/btf_dump.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Aug. 2, 2024, 7:30 p.m. UTC | #1 
Hello:

This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@kernel.org>:

On Fri,  2 Aug 2024 11:54:34 -0700 you wrote:
> Jakub reported bpf selftest "btf_dump" failure after forwarding to
> v6.11-rc1 with netdev.
>   Error: #33 btf_dump
>   Error: #33/15 btf_dump/btf_dump: var_data
>     btf_dump_data:FAIL:find type id unexpected find type id: actual -2 < expected 0
> 
> The reason for the failure is due to
>   commit 94ede2a3e913 ("profiling: remove stale percpu flip buffer variables")
> where percpu static variable "cpu_profile_flip" is removed.
> 
> [...]

Here is the summary with links:
  - [bpf-next] selftests/bpf: Fix a btf_dump selftest failure
    https://git.kernel.org/bpf/bpf-next/c/3d650ab5e7d9

You are awesome, thank you!
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/btf_dump.c b/tools/testing/selftests/bpf/prog_tests/btf_dump.c
index 09a8e6f9b379..b293b8501fd6 100644
--- a/tools/testing/selftests/bpf/prog_tests/btf_dump.c
+++ b/tools/testing/selftests/bpf/prog_tests/btf_dump.c
@@ -805,8 +805,8 @@  static void test_btf_dump_var_data(struct btf *btf, struct btf_dump *d,
 	TEST_BTF_DUMP_VAR(btf, d, NULL, str, "cpu_number", int, BTF_F_COMPACT,
 			  "int cpu_number = (int)100", 100);
 #endif
-	TEST_BTF_DUMP_VAR(btf, d, NULL, str, "cpu_profile_flip", int, BTF_F_COMPACT,
-			  "static int cpu_profile_flip = (int)2", 2);
+	TEST_BTF_DUMP_VAR(btf, d, NULL, str, "bpf_cgrp_storage_busy", int, BTF_F_COMPACT,
+			  "static int bpf_cgrp_storage_busy = (int)2", 2);
 }
 
 static void test_btf_datasec(struct btf *btf, struct btf_dump *d, char *str,