diff options
author | Johannes Berg <johannes.berg@intel.com> | 2012-06-22 11:36:25 (GMT) |
---|---|---|
committer | Johannes Berg <johannes.berg@intel.com> | 2012-06-24 09:33:18 (GMT) |
commit | 3fae0273168026ed7b6065674f1410f531d58164 (patch) | |
tree | 18333b3760f1c5fea83d1f92a1a6c8a0c1e0212d /net | |
parent | 011ad0e9f8533cd003fb760663713df2655a2114 (diff) | |
download | linux-3fae0273168026ed7b6065674f1410f531d58164.tar.xz |
mac80211: trace debug messages
It can be very useful to have all debug messages
available when debugging, but hard to correlate
between different sources, so add a trace event
for all mac80211 debug messages.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
-rw-r--r-- | net/mac80211/Kconfig | 13 | ||||
-rw-r--r-- | net/mac80211/debug.h | 18 | ||||
-rw-r--r-- | net/mac80211/trace.c | 66 | ||||
-rw-r--r-- | net/mac80211/trace.h | 39 |
4 files changed, 136 insertions, 0 deletions
diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig index 7475e26..63af254 100644 --- a/net/mac80211/Kconfig +++ b/net/mac80211/Kconfig @@ -107,6 +107,19 @@ config MAC80211_DEBUGFS Say N unless you know you need this. +config MAC80211_MESSAGE_TRACING + bool "Trace all mac80211 debug messages" + depends on MAC80211 + ---help--- + Select this option to have mac80211 register the + mac80211_msg trace subsystem with tracepoints to + collect all debugging messages, independent of + printing them into the kernel log. + + The overhead in this option is that all the messages + need to be present in the binary and formatted at + runtime for tracing. + menuconfig MAC80211_DEBUG_MENU bool "Select mac80211 debugging features" depends on MAC80211 diff --git a/net/mac80211/debug.h b/net/mac80211/debug.h index 6e6bbb9..8f383a5 100644 --- a/net/mac80211/debug.h +++ b/net/mac80211/debug.h @@ -1,5 +1,6 @@ #ifndef __MAC80211_DEBUG_H #define __MAC80211_DEBUG_H +#include <net/cfg80211.h> #ifdef CONFIG_MAC80211_IBSS_DEBUG #define MAC80211_IBSS_DEBUG 1 @@ -61,6 +62,22 @@ #define MAC80211_MLME_DEBUG 0 #endif +#ifdef CONFIG_MAC80211_MESSAGE_TRACING +void __sdata_info(const char *fmt, ...) __printf(1, 2); +void __sdata_dbg(bool print, const char *fmt, ...) __printf(2, 3); +void __sdata_err(const char *fmt, ...) __printf(1, 2); +void __wiphy_dbg(struct wiphy *wiphy, bool print, const char *fmt, ...) + __printf(3, 4); + +#define _sdata_info(sdata, fmt, ...) \ + __sdata_info("%s: " fmt, (sdata)->name, ##__VA_ARGS__) +#define _sdata_dbg(print, sdata, fmt, ...) \ + __sdata_dbg(print, "%s: " fmt, (sdata)->name, ##__VA_ARGS__) +#define _sdata_err(sdata, fmt, ...) \ + __sdata_err("%s: " fmt, (sdata)->name, ##__VA_ARGS__) +#define _wiphy_dbg(print, wiphy, fmt, ...) \ + __wiphy_dbg(wiphy, print, fmt, ##__VA_ARGS__) +#else #define _sdata_info(sdata, fmt, ...) \ do { \ pr_info("%s: " fmt, \ @@ -85,6 +102,7 @@ do { \ if (print) \ wiphy_dbg((wiphy), fmt, ##__VA_ARGS__); \ } while (0) +#endif #define sdata_info(sdata, fmt, ...) \ _sdata_info(sdata, fmt, ##__VA_ARGS__) diff --git a/net/mac80211/trace.c b/net/mac80211/trace.c index 943da6e..386e45d8 100644 --- a/net/mac80211/trace.c +++ b/net/mac80211/trace.c @@ -3,7 +3,73 @@ /* sparse isn't too happy with all macros... */ #ifndef __CHECKER__ +#include <net/cfg80211.h> #include "driver-ops.h" +#include "debug.h" #define CREATE_TRACE_POINTS #include "trace.h" + +#ifdef CONFIG_MAC80211_MESSAGE_TRACING +void __sdata_info(const char *fmt, ...) +{ + struct va_format vaf = { + .fmt = fmt, + }; + va_list args; + + va_start(args, fmt); + vaf.va = &args; + + pr_info("%pV", &vaf); + trace_mac80211_info(&vaf); + va_end(args); +} + +void __sdata_dbg(bool print, const char *fmt, ...) +{ + struct va_format vaf = { + .fmt = fmt, + }; + va_list args; + + va_start(args, fmt); + vaf.va = &args; + + if (print) + pr_debug("%pV", &vaf); + trace_mac80211_dbg(&vaf); + va_end(args); +} + +void __sdata_err(const char *fmt, ...) +{ + struct va_format vaf = { + .fmt = fmt, + }; + va_list args; + + va_start(args, fmt); + vaf.va = &args; + + pr_err("%pV", &vaf); + trace_mac80211_err(&vaf); + va_end(args); +} + +void __wiphy_dbg(struct wiphy *wiphy, bool print, const char *fmt, ...) +{ + struct va_format vaf = { + .fmt = fmt, + }; + va_list args; + + va_start(args, fmt); + vaf.va = &args; + + if (print) + wiphy_dbg(wiphy, "%pV", &vaf); + trace_mac80211_dbg(&vaf); + va_end(args); +} +#endif #endif diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h index 392bcc9..2e60f4a 100644 --- a/net/mac80211/trace.h +++ b/net/mac80211/trace.h @@ -1632,6 +1632,45 @@ TRACE_EVENT(stop_queue, LOCAL_PR_ARG, __entry->queue, __entry->reason ) ); + +#ifdef CONFIG_MAC80211_MESSAGE_TRACING +#undef TRACE_SYSTEM +#define TRACE_SYSTEM mac80211_msg + +#define MAX_MSG_LEN 100 + +DECLARE_EVENT_CLASS(mac80211_msg_event, + TP_PROTO(struct va_format *vaf), + + TP_ARGS(vaf), + + TP_STRUCT__entry( + __dynamic_array(char, msg, MAX_MSG_LEN) + ), + + TP_fast_assign( + WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg), + MAX_MSG_LEN, vaf->fmt, + *vaf->va) >= MAX_MSG_LEN); + ), + + TP_printk("%s", __get_str(msg)) +); + +DEFINE_EVENT(mac80211_msg_event, mac80211_info, + TP_PROTO(struct va_format *vaf), + TP_ARGS(vaf) +); +DEFINE_EVENT(mac80211_msg_event, mac80211_dbg, + TP_PROTO(struct va_format *vaf), + TP_ARGS(vaf) +); +DEFINE_EVENT(mac80211_msg_event, mac80211_err, + TP_PROTO(struct va_format *vaf), + TP_ARGS(vaf) +); +#endif + #endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */ #undef TRACE_INCLUDE_PATH |