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bpfilter: Specify the log level for the kmsg message

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Per the kmsg document [0], if we don't specify the log level with a
prefix "<N>" in the message string, the default log level will be
applied to the message. Since the default level could be warning(4),
this would make the log utility such as journalctl treat the message,
"Started bpfilter", as a warning. To avoid confusion, this commit
adds the prefix "<5>" to make the message always a notice.

  [0] https://www.kernel.org/doc/Documentation/ABI/testing/dev-kmsg

Fixes: 36c4357c63 ("net: bpfilter: print umh messages to /dev/kmsg")
Reported-by: Martin Loviska <mloviska@suse.com>
Signed-off-by: Gary Lin <glin@suse.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Dmitrii Banshchikov <me@ubique.spb.ru>
Link: https://lore.kernel.org/bpf/20210623040918.8683-1-glin@suse.com
This commit is contained in:
Gary Lin 2021-06-23 12:09:18 +08:00 • committed by Daniel Borkmann
parent 0cc84b9a60
commit a196fa78a2
1 changed files with 1 additions and 1 deletions
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2
net/bpfilter/main.c
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@ -57,7 +57,7 @@ int main(void)
{
debug_f = fopen("/dev/kmsg", "w");
setvbuf(debug_f, 0, _IOLBF, 0);
fprintf(debug_f, "Started bpfilter\n");
fprintf(debug_f, "<5>Started bpfilter\n");
loop();
fclose(debug_f);
return 0;