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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-14 10:49:03 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-14 10:49:03 -0700 |
commit | eeee78cf77df0450ca285a7cd6d73842181e825c (patch) | |
tree | 330540323eae82977756e5086492654b9e461871 /net/mac80211 | |
parent | 3f3c73de77b5598e9f87812ac4da9445090c3b4a (diff) | |
parent | 9828413d4715d4ed12bc92b161f4ed377d777ffb (diff) | |
download | blackbird-op-linux-eeee78cf77df0450ca285a7cd6d73842181e825c.tar.gz blackbird-op-linux-eeee78cf77df0450ca285a7cd6d73842181e825c.zip |
Merge tag 'trace-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"Some clean ups and small fixes, but the biggest change is the addition
of the TRACE_DEFINE_ENUM() macro that can be used by tracepoints.
Tracepoints have helper functions for the TP_printk() called
__print_symbolic() and __print_flags() that lets a numeric number be
displayed as a a human comprehensible text. What is placed in the
TP_printk() is also shown in the tracepoint format file such that user
space tools like perf and trace-cmd can parse the binary data and
express the values too. Unfortunately, the way the TRACE_EVENT()
macro works, anything placed in the TP_printk() will be shown pretty
much exactly as is. The problem arises when enums are used. That's
because unlike macros, enums will not be changed into their values by
the C pre-processor. Thus, the enum string is exported to the format
file, and this makes it useless for user space tools.
The TRACE_DEFINE_ENUM() solves this by converting the enum strings in
the TP_printk() format into their number, and that is what is shown to
user space. For example, the tracepoint tlb_flush currently has this
in its format file:
__print_symbolic(REC->reason,
{ TLB_FLUSH_ON_TASK_SWITCH, "flush on task switch" },
{ TLB_REMOTE_SHOOTDOWN, "remote shootdown" },
{ TLB_LOCAL_SHOOTDOWN, "local shootdown" },
{ TLB_LOCAL_MM_SHOOTDOWN, "local mm shootdown" })
After adding:
TRACE_DEFINE_ENUM(TLB_FLUSH_ON_TASK_SWITCH);
TRACE_DEFINE_ENUM(TLB_REMOTE_SHOOTDOWN);
TRACE_DEFINE_ENUM(TLB_LOCAL_SHOOTDOWN);
TRACE_DEFINE_ENUM(TLB_LOCAL_MM_SHOOTDOWN);
Its format file will contain this:
__print_symbolic(REC->reason,
{ 0, "flush on task switch" },
{ 1, "remote shootdown" },
{ 2, "local shootdown" },
{ 3, "local mm shootdown" })"
* tag 'trace-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (27 commits)
tracing: Add enum_map file to show enums that have been mapped
writeback: Export enums used by tracepoint to user space
v4l: Export enums used by tracepoints to user space
SUNRPC: Export enums in tracepoints to user space
mm: tracing: Export enums in tracepoints to user space
irq/tracing: Export enums in tracepoints to user space
f2fs: Export the enums in the tracepoints to userspace
net/9p/tracing: Export enums in tracepoints to userspace
x86/tlb/trace: Export enums in used by tlb_flush tracepoint
tracing/samples: Update the trace-event-sample.h with TRACE_DEFINE_ENUM()
tracing: Allow for modules to convert their enums to values
tracing: Add TRACE_DEFINE_ENUM() macro to map enums to their values
tracing: Update trace-event-sample with TRACE_SYSTEM_VAR documentation
tracing: Give system name a pointer
brcmsmac: Move each system tracepoints to their own header
iwlwifi: Move each system tracepoints to their own header
mac80211: Move message tracepoints to their own header
tracing: Add TRACE_SYSTEM_VAR to xhci-hcd
tracing: Add TRACE_SYSTEM_VAR to kvm-s390
tracing: Add TRACE_SYSTEM_VAR to intel-sst
...
Diffstat (limited to 'net/mac80211')
-rw-r--r-- | net/mac80211/trace.c | 1 | ||||
-rw-r--r-- | net/mac80211/trace.h | 38 | ||||
-rw-r--r-- | net/mac80211/trace_msg.h | 53 |
3 files changed, 54 insertions, 38 deletions
diff --git a/net/mac80211/trace.c b/net/mac80211/trace.c index 386e45d8a958..edfe0c170a1c 100644 --- a/net/mac80211/trace.c +++ b/net/mac80211/trace.c @@ -8,6 +8,7 @@ #include "debug.h" #define CREATE_TRACE_POINTS #include "trace.h" +#include "trace_msg.h" #ifdef CONFIG_MAC80211_MESSAGE_TRACING void __sdata_info(const char *fmt, ...) diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h index 263a9561eb26..755a5388dbca 100644 --- a/net/mac80211/trace.h +++ b/net/mac80211/trace.h @@ -2312,44 +2312,6 @@ TRACE_EVENT(drv_tdls_recv_channel_switch, ) ); -#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 diff --git a/net/mac80211/trace_msg.h b/net/mac80211/trace_msg.h new file mode 100644 index 000000000000..768f7c22a190 --- /dev/null +++ b/net/mac80211/trace_msg.h @@ -0,0 +1,53 @@ +#ifdef CONFIG_MAC80211_MESSAGE_TRACING + +#if !defined(__MAC80211_MSG_DRIVER_TRACE) || defined(TRACE_HEADER_MULTI_READ) +#define __MAC80211_MSG_DRIVER_TRACE + +#include <linux/tracepoint.h> +#include <net/mac80211.h> +#include "ieee80211_i.h" + +#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 /* !__MAC80211_MSG_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace_msg +#include <trace/define_trace.h> + +#endif |