Commit a196fa78 authored by Gary Lin's avatar Gary Lin Committed by Daniel Borkmann
Browse files

bpfilter: Specify the log level for the kmsg message 

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: 36c4357c ("net: bpfilter: print umh messages to /dev/kmsg")
Reported-by: default avatarMartin Loviska <mloviska@suse.com>
Signed-off-by: default avatarGary Lin <glin@suse.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarDmitrii Banshchikov <me@ubique.spb.ru>
Link: https://lore.kernel.org/bpf/20210623040918.8683-1-glin@suse.com
parent 0cc84b9a

net/bpfilter/main.c

+1 −1
Original line number Diff line number Diff line
@@ -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;