net: add CONFIG_DEBUG_NET

This config option enables network debugging checks. This patch adds DEBUG_NET_WARN_ON_ONCE(cond) Note that this is not a replacement for WARN_ON_ONCE(cond) as (cond) is not evaluated if CONFIG_DEBUG_NET is not set.

Eric Dumazet committed 4 years ago

Commit d268c1f1 parent 5b87be92 files · +13 −0Browse files

Unified · Split

2 files

include/net/net_debug.h +6 −0
net/Kconfig.debug +7 −0

include/net/net_debug.h+6−0

@@ -148,4 +148,10 @@ do { \ · 147 unmodified lines
148	#endif	148	#endif
149		149
150		150
		151	#if defined(CONFIG_DEBUG_NET)
		152	#define DEBUG_NET_WARN_ON_ONCE(cond) (void)WARN_ON_ONCE(cond)
		153	#else
		154	#define DEBUG_NET_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond)
		155	#endif
		156
151	#endif /* _LINUX_NET_DEBUG_H */	157	#endif /* _LINUX_NET_DEBUG_H */

net/Kconfig.debug+7−0

@@ -17,3 +17,10 @@ config NET_NS_REFCNT_TRACKER · 16 unmodified lines
17	help	17	help
18	Enable debugging feature to track netns references.	18	Enable debugging feature to track netns references.
19	This adds memory and cpu costs.	19	This adds memory and cpu costs.
		20
		21	config DEBUG_NET
		22	bool "Add generic networking debug"
		23	depends on DEBUG_KERNEL
		24	help
		25	Enable extra sanity checks in networking.
		26	This is mostly used by fuzzers, but is safe to select.