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selftests: net: bpf_offload: print loaded programs on mismatch

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The test sometimes fails due to an unexpected number of loaded programs. e.g

  FAIL: 2 BPF programs loaded, expected 1
    File "/usr/libexec/kselftests/net/./bpf_offload.py", line 940, in <module>
      progs = bpftool_prog_list(expected=1)
    File "/usr/libexec/kselftests/net/./bpf_offload.py", line 187, in bpftool_prog_list
      fail(True, "%d BPF programs loaded, expected %d" %
    File "/usr/libexec/kselftests/net/./bpf_offload.py", line 89, in fail
      tb = "".join(traceback.extract_stack().format())

However, the logs do not show which programs were actually loaded, making it
difficult to debug the failure.

Add printing of the loaded programs when a mismatch is detected to help
troubleshoot such errors. The list is printed on a new line to avoid breaking
the current log format.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://patch.msgid.link/20250819073348.387972-1-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Hangbin Liu
2025-08-20 19:28:03 -07:00
committed by Jakub Kicinski
parent 6b4b1d577e
commit eacb6e408d
1 changed files with 2 additions and 2 deletions
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tools/testing/selftests/net/bpf_offload.py
+2 -2
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@@ -184,8 +184,8 @@ def bpftool_prog_list(expected=None, ns="", exclude_orphaned=True):
progs = [ p for p in progs if not p['orphaned'] ]
if expected is not None:
if len(progs) != expected:
fail(True, "%d BPF programs loaded, expected %d" %
(len(progs), expected))
fail(True, "%d BPF programs loaded, expected %d\nLoaded Progs:\n%s" %
(len(progs), expected, pp.pformat(progs)))
return progs
def bpftool_map_list(expected=None, ns=""):