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authorDaniel Borkmann <dborkman@redhat.com>2013-06-28 19:49:40 +0200
committerDavid S. Miller <davem@davemloft.net>2013-07-01 23:22:13 -0700
commitbb33381d0c97cdee25f2cdab540b6e2bd16fa03b (patch)
treea4def6ec9f554908e07efa8671ca52f60f9a2a18 /net/sctp/debug.c
parent1067964305df131ede2c08c2f3c9b3892640f1c6 (diff)
downloadlinux-bb33381d0c97cdee25f2cdab540b6e2bd16fa03b.tar.bz2
net: sctp: rework debugging framework to use pr_debug and friends
We should get rid of all own SCTP debug printk macros and use the ones that the kernel offers anyway instead. This makes the code more readable and conform to the kernel code, and offers all the features of dynamic debbuging that pr_debug() et al has, such as only turning on/off portions of debug messages at runtime through debugfs. The runtime cost of having CONFIG_DYNAMIC_DEBUG enabled, but none of the debug statements printing, is negligible [1]. If kernel debugging is completly turned off, then these statements will also compile into "empty" functions. While we're at it, we also need to change the Kconfig option as it /now/ only refers to the ifdef'ed code portions in outqueue.c that enable further debugging/tracing of SCTP transaction fields. Also, since SCTP_ASSERT code was enabled with this Kconfig option and has now been removed, we transform those code parts into WARNs resp. where appropriate BUG_ONs so that those bugs can be more easily detected as probably not many people have SCTP debugging permanently turned on. To turn on all SCTP debugging, the following steps are needed: # mount -t debugfs none /sys/kernel/debug # echo -n 'module sctp +p' > /sys/kernel/debug/dynamic_debug/control This can be done more fine-grained on a per file, per line basis and others as described in [2]. [1] https://www.kernel.org/doc/ols/2009/ols2009-pages-39-46.pdf [2] Documentation/dynamic-debug-howto.txt Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/debug.c')
-rw-r--r--net/sctp/debug.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/net/sctp/debug.c b/net/sctp/debug.c
index ec997cfe0a7e..f4998780d6df 100644
--- a/net/sctp/debug.c
+++ b/net/sctp/debug.c
@@ -47,10 +47,6 @@
#include <net/sctp/sctp.h>
-#if SCTP_DEBUG
-int sctp_debug_flag = 1; /* Initially enable DEBUG */
-#endif /* SCTP_DEBUG */
-
/* These are printable forms of Chunk ID's from section 3.1. */
static const char *const sctp_cid_tbl[SCTP_NUM_BASE_CHUNK_TYPES] = {
"DATA",