1 files changed, 101 insertions, 30 deletions

diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 2233c98d80df..02b8b24f8f51 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -5,13 +5,12 @@
 #include <linux/trace_seq.h>
 #include <linux/percpu.h>
 #include <linux/hardirq.h>
+#include <linux/perf_event.h>
 
 struct trace_array;
 struct tracer;
 struct dentry;
 
-DECLARE_PER_CPU(struct trace_seq, ftrace_event_seq);
-
 struct trace_print_flags {
         unsigned long           mask;
         const char              *name;
@@ -24,6 +23,9 @@ const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
 const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
                                      const struct trace_print_flags *symbol_array);
 
+const char *ftrace_print_hex_seq(struct trace_seq *p,
+                                 const unsigned char *buf, int len);
+
 /*
  * The trace entry - the most basic unit of tracing. This is what
  * is printed in the end as a single line in the trace output, such as:
@@ -54,9 +56,13 @@ struct trace_iterator {
         struct ring_buffer_iter *buffer_iter[NR_CPUS];
         unsigned long           iter_flags;
 
+        /* trace_seq for __print_flags() and __print_symbolic() etc. */
+        struct trace_seq        tmp_seq;
+
         /* The below is zeroed out in pipe_read */
         struct trace_seq        seq;
         struct trace_entry      *ent;
+        unsigned long           lost_events;
         int                     leftover;
         int                     cpu;
         u64                     ts;
@@ -68,18 +74,25 @@ struct trace_iterator {
 };
 
 
+struct trace_event;
+
 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
-                                              int flags);
-struct trace_event {
-        struct hlist_node       node;
-        struct list_head        list;
-        int                     type;
+                                      int flags, struct trace_event *event);
+
+struct trace_event_functions {
         trace_print_func        trace;
         trace_print_func        raw;
         trace_print_func        hex;
         trace_print_func        binary;
 };
 
+struct trace_event {
+        struct hlist_node               node;
+        struct list_head                list;
+        int                             type;
+        struct trace_event_functions    *funcs;
+};
+
 extern int register_ftrace_event(struct trace_event *event);
 extern int unregister_ftrace_event(struct trace_event *event);
 
@@ -111,35 +124,79 @@ void tracing_record_cmdline(struct task_struct *tsk);
 
 struct event_filter;
 
+enum trace_reg {
+        TRACE_REG_REGISTER,
+        TRACE_REG_UNREGISTER,
+        TRACE_REG_PERF_REGISTER,
+        TRACE_REG_PERF_UNREGISTER,
+};
+
+struct ftrace_event_call;
+
+struct ftrace_event_class {
+        char                    *system;
+        void                    *probe;
+#ifdef CONFIG_PERF_EVENTS
+        void                    *perf_probe;
+#endif
+        int                     (*reg)(struct ftrace_event_call *event,
+                                       enum trace_reg type);
+        int                     (*define_fields)(struct ftrace_event_call *);
+        struct list_head        *(*get_fields)(struct ftrace_event_call *);
+        struct list_head        fields;
+        int                     (*raw_init)(struct ftrace_event_call *);
+};
+
+extern int ftrace_event_reg(struct ftrace_event_call *event,
+                            enum trace_reg type);
+
+enum {
+        TRACE_EVENT_FL_ENABLED_BIT,
+        TRACE_EVENT_FL_FILTERED_BIT,
+        TRACE_EVENT_FL_RECORDED_CMD_BIT,
+};
+
+enum {
+        TRACE_EVENT_FL_ENABLED          = (1 << TRACE_EVENT_FL_ENABLED_BIT),
+        TRACE_EVENT_FL_FILTERED         = (1 << TRACE_EVENT_FL_FILTERED_BIT),
+        TRACE_EVENT_FL_RECORDED_CMD     = (1 << TRACE_EVENT_FL_RECORDED_CMD_BIT),
+};
+
 struct ftrace_event_call {
         struct list_head        list;
+        struct ftrace_event_class *class;
         char                    *name;
-        char                    *system;
         struct dentry           *dir;
-        struct trace_event      *event;
-        int                     enabled;
-        int                     (*regfunc)(struct ftrace_event_call *);
-        void                    (*unregfunc)(struct ftrace_event_call *);
-        int                     id;
-        int                     (*raw_init)(struct ftrace_event_call *);
-        int                     (*show_format)(struct ftrace_event_call *,
-                                               struct trace_seq *);
-        int                     (*define_fields)(struct ftrace_event_call *);
-        struct list_head        fields;
-        int                     filter_active;
+        struct trace_event      event;
+        const char              *print_fmt;
         struct event_filter     *filter;
         void                    *mod;
         void                    *data;
 
-        int                     profile_count;
-        int                     (*profile_enable)(struct ftrace_event_call *);
-        void                    (*profile_disable)(struct ftrace_event_call *);
+        /*
+         * 32 bit flags:
+         *   bit 1:             enabled
+         *   bit 2:             filter_active
+         *   bit 3:             enabled cmd record
+         *
+         * Changes to flags must hold the event_mutex.
+         *
+         * Note: Reads of flags do not hold the event_mutex since
+         * they occur in critical sections. But the way flags
+         * is currently used, these changes do no affect the code
+         * except that when a change is made, it may have a slight
+         * delay in propagating the changes to other CPUs due to
+         * caching and such.
+         */
+        unsigned int            flags;
+
+#ifdef CONFIG_PERF_EVENTS
+        int                     perf_refcount;
+        struct hlist_head       *perf_events;
+#endif
 };
 
-#define FTRACE_MAX_PROFILE_SIZE 2048
-
-extern char *perf_trace_buf;
-extern char *perf_trace_buf_nmi;
+#define PERF_MAX_TRACE_SIZE     2048
 
 #define MAX_FILTER_PRED         32
 #define MAX_FILTER_STR_VAL      256     /* Should handle KSYM_SYMBOL_LEN */
@@ -188,13 +245,27 @@ do {									\
                 __trace_printk(ip, fmt, ##args);                        \
 } while (0)
 
-#ifdef CONFIG_EVENT_PROFILE
+#ifdef CONFIG_PERF_EVENTS
 struct perf_event;
-extern int ftrace_profile_enable(int event_id);
-extern void ftrace_profile_disable(int event_id);
-extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
+
+DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
+
+extern int  perf_trace_init(struct perf_event *event);
+extern void perf_trace_destroy(struct perf_event *event);
+extern int  perf_trace_enable(struct perf_event *event);
+extern void perf_trace_disable(struct perf_event *event);
+extern int  ftrace_profile_set_filter(struct perf_event *event, int event_id,
                                      char *filter_str);
 extern void ftrace_profile_free_filter(struct perf_event *event);
+extern void *perf_trace_buf_prepare(int size, unsigned short type,
+                                    struct pt_regs *regs, int *rctxp);
+
+static inline void
+perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr,
+                       u64 count, struct pt_regs *regs, void *head)
+{
+        perf_tp_event(addr, count, raw_data, size, regs, head, rctx);
+}
 #endif
 
 #endif /* _LINUX_FTRACE_EVENT_H */