#ifndef _LINUX_FTRACE_EVENT_H
#define _LINUX_FTRACE_EVENT_H
-#include <linux/trace_seq.h>
#include <linux/ring_buffer.h>
+#include <linux/trace_seq.h>
#include <linux/percpu.h>
+#include <linux/hardirq.h>
+#include <linux/perf_event.h>
struct trace_array;
struct tracer;
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:
unsigned char flags;
unsigned char preempt_count;
int pid;
- int tgid;
+ int lock_depth;
};
#define FTRACE_MAX_EVENT \
/* 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;
};
+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);
unsigned long flags,
int pc);
struct ring_buffer_event *
-trace_current_buffer_lock_reserve(int type, unsigned long len,
+trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer,
+ int type, unsigned long len,
unsigned long flags, int pc);
-void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
+void trace_current_buffer_unlock_commit(struct ring_buffer *buffer,
+ struct ring_buffer_event *event,
unsigned long flags, int pc);
-void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event,
+void trace_nowake_buffer_unlock_commit(struct ring_buffer *buffer,
+ struct ring_buffer_event *event,
unsigned long flags, int pc);
-void trace_current_buffer_discard_commit(struct ring_buffer_event *event);
+void trace_current_buffer_discard_commit(struct ring_buffer *buffer,
+ struct ring_buffer_event *event);
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 *);
+};
+
+enum {
+ TRACE_EVENT_FL_ENABLED_BIT,
+ TRACE_EVENT_FL_FILTERED_BIT,
+};
+
+enum {
+ TRACE_EVENT_FL_ENABLED = (1 << TRACE_EVENT_FL_ENABLED_BIT),
+ TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_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)(void *);
- void (*unregfunc)(void *);
- int id;
- int (*raw_init)(void);
- int (*show_format)(struct ftrace_event_call *call,
- struct trace_seq *s);
- 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;
- atomic_t 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
+ *
+ * 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 PERF_MAX_TRACE_SIZE 2048
+
#define MAX_FILTER_PRED 32
-#define MAX_FILTER_STR_VAL 128
+#define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */
-extern int init_preds(struct ftrace_event_call *call);
extern void destroy_preds(struct ftrace_event_call *call);
-extern int filter_match_preds(struct ftrace_event_call *call, void *rec);
-extern int filter_current_check_discard(struct ftrace_event_call *call,
+extern int filter_match_preds(struct event_filter *filter, void *rec);
+extern int filter_current_check_discard(struct ring_buffer *buffer,
+ struct ftrace_event_call *call,
void *rec,
struct ring_buffer_event *event);
FILTER_PTR_STRING,
};
-extern int trace_define_field(struct ftrace_event_call *call,
- const char *type, const char *name,
- int offset, int size, int is_signed,
- int filter_type);
-extern int trace_define_common_fields(struct ftrace_event_call *call);
+extern int trace_event_raw_init(struct ftrace_event_call *call);
+extern int trace_define_field(struct ftrace_event_call *call, const char *type,
+ const char *name, int offset, int size,
+ int is_signed, int filter_type);
+extern int trace_add_event_call(struct ftrace_event_call *call);
+extern void trace_remove_event_call(struct ftrace_event_call *call);
#define is_signed_type(type) (((type)(-1)) < 0)
__trace_printk(ip, fmt, ##args); \
} while (0)
+#ifdef CONFIG_PERF_EVENTS
+struct perf_event;
+
+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);
+ perf_swevent_put_recursion_context(rctx);
+}
+#endif
+
#endif /* _LINUX_FTRACE_EVENT_H */
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