2009-04-13 09:20:49 -06:00
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#ifndef _LINUX_FTRACE_EVENT_H
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#define _LINUX_FTRACE_EVENT_H
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#include <linux/ring_buffer.h>
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2009-09-12 17:04:54 -06:00
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#include <linux/trace_seq.h>
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2009-05-26 12:25:22 -06:00
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#include <linux/percpu.h>
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#include <linux/hardirq.h>
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#include <linux/perf_event.h>
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2009-04-13 09:20:49 -06:00
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struct trace_array;
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struct tracer;
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struct dentry;
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2009-05-26 12:25:22 -06:00
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struct trace_print_flags {
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unsigned long mask;
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const char *name;
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};
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2011-04-18 19:35:28 -06:00
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struct trace_print_flags_u64 {
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unsigned long long mask;
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const char *name;
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};
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2009-05-26 12:25:22 -06:00
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const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
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unsigned long flags,
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const struct trace_print_flags *flag_array);
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2009-05-20 17:21:47 -06:00
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const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
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const struct trace_print_flags *symbol_array);
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2011-04-18 19:35:28 -06:00
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#if BITS_PER_LONG == 32
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const char *ftrace_print_symbols_seq_u64(struct trace_seq *p,
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unsigned long long val,
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const struct trace_print_flags_u64
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*symbol_array);
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#endif
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2010-04-01 05:40:58 -06:00
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const char *ftrace_print_hex_seq(struct trace_seq *p,
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const unsigned char *buf, int len);
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2009-04-13 09:20:49 -06:00
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/*
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* The trace entry - the most basic unit of tracing. This is what
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* is printed in the end as a single line in the trace output, such as:
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*
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* bash-15816 [01] 235.197585: idle_cpu <- irq_enter
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*/
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struct trace_entry {
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unsigned short type;
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unsigned char flags;
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unsigned char preempt_count;
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int pid;
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int padding;
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};
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#define FTRACE_MAX_EVENT \
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((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
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2009-04-13 09:20:49 -06:00
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/*
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* Trace iterator - used by printout routines who present trace
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* results to users and which routines might sleep, etc:
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*/
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struct trace_iterator {
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struct trace_array *tr;
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struct tracer *trace;
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void *private;
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int cpu_file;
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struct mutex mutex;
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struct ring_buffer_iter **buffer_iter;
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unsigned long iter_flags;
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/* trace_seq for __print_flags() and __print_symbolic() etc. */
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struct trace_seq tmp_seq;
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2009-04-13 09:20:49 -06:00
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/* The below is zeroed out in pipe_read */
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struct trace_seq seq;
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struct trace_entry *ent;
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unsigned long lost_events;
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int leftover;
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int ent_size;
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int cpu;
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u64 ts;
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loff_t pos;
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long idx;
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cpumask_var_t started;
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};
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struct trace_event;
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typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
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int flags, struct trace_event *event);
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struct trace_event_functions {
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trace_print_func trace;
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trace_print_func raw;
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trace_print_func hex;
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trace_print_func binary;
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};
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2010-04-22 16:46:14 -06:00
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struct trace_event {
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struct hlist_node node;
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struct list_head list;
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int type;
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struct trace_event_functions *funcs;
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};
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extern int register_ftrace_event(struct trace_event *event);
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extern int unregister_ftrace_event(struct trace_event *event);
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/* Return values for print_line callback */
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enum print_line_t {
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TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */
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TRACE_TYPE_HANDLED = 1,
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TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */
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TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */
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};
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2009-08-06 17:25:54 -06:00
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void tracing_generic_entry_update(struct trace_entry *entry,
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unsigned long flags,
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int pc);
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struct ring_buffer_event *
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trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer,
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int type, unsigned long len,
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unsigned long flags, int pc);
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void trace_current_buffer_unlock_commit(struct ring_buffer *buffer,
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struct ring_buffer_event *event,
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unsigned long flags, int pc);
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void trace_nowake_buffer_unlock_commit(struct ring_buffer *buffer,
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struct ring_buffer_event *event,
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unsigned long flags, int pc);
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void trace_nowake_buffer_unlock_commit_regs(struct ring_buffer *buffer,
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struct ring_buffer_event *event,
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unsigned long flags, int pc,
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struct pt_regs *regs);
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void trace_current_buffer_discard_commit(struct ring_buffer *buffer,
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struct ring_buffer_event *event);
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void tracing_record_cmdline(struct task_struct *tsk);
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2009-07-19 20:20:53 -06:00
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struct event_filter;
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2010-04-21 10:27:06 -06:00
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enum trace_reg {
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TRACE_REG_REGISTER,
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TRACE_REG_UNREGISTER,
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#ifdef CONFIG_PERF_EVENTS
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TRACE_REG_PERF_REGISTER,
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TRACE_REG_PERF_UNREGISTER,
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TRACE_REG_PERF_OPEN,
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TRACE_REG_PERF_CLOSE,
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TRACE_REG_PERF_ADD,
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TRACE_REG_PERF_DEL,
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#endif
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};
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struct ftrace_event_call;
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2010-04-20 08:47:33 -06:00
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struct ftrace_event_class {
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char *system;
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void *probe;
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#ifdef CONFIG_PERF_EVENTS
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void *perf_probe;
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#endif
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int (*reg)(struct ftrace_event_call *event,
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enum trace_reg type, void *data);
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int (*define_fields)(struct ftrace_event_call *);
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struct list_head *(*get_fields)(struct ftrace_event_call *);
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struct list_head fields;
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int (*raw_init)(struct ftrace_event_call *);
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};
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extern int ftrace_event_reg(struct ftrace_event_call *event,
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enum trace_reg type, void *data);
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2010-04-23 09:12:36 -06:00
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enum {
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TRACE_EVENT_FL_ENABLED_BIT,
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TRACE_EVENT_FL_FILTERED_BIT,
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TRACE_EVENT_FL_RECORDED_CMD_BIT,
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TRACE_EVENT_FL_CAP_ANY_BIT,
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TRACE_EVENT_FL_NO_SET_FILTER_BIT,
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TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
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};
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enum {
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TRACE_EVENT_FL_ENABLED = (1 << TRACE_EVENT_FL_ENABLED_BIT),
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TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
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TRACE_EVENT_FL_RECORDED_CMD = (1 << TRACE_EVENT_FL_RECORDED_CMD_BIT),
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TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
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TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
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TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
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};
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2009-04-13 09:20:49 -06:00
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struct ftrace_event_call {
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struct list_head list;
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struct ftrace_event_class *class;
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char *name;
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struct dentry *dir;
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struct trace_event event;
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2009-12-15 00:39:42 -07:00
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const char *print_fmt;
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struct event_filter *filter;
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2009-04-10 12:53:50 -06:00
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void *mod;
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2009-08-10 14:52:44 -06:00
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void *data;
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2009-04-13 09:20:49 -06:00
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2010-04-23 09:12:36 -06:00
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/*
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* 32 bit flags:
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* bit 1: enabled
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* bit 2: filter_active
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* bit 3: enabled cmd record
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* bit 4: allow trace by non root (cap any)
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* bit 5: failed to apply filter
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* bit 6: ftrace internal event (do not enable)
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*
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* Changes to flags must hold the event_mutex.
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*
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* Note: Reads of flags do not hold the event_mutex since
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* they occur in critical sections. But the way flags
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* is currently used, these changes do no affect the code
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* except that when a change is made, it may have a slight
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* delay in propagating the changes to other CPUs due to
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* caching and such.
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2010-04-23 09:12:36 -06:00
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*/
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unsigned int flags;
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2010-05-21 09:49:57 -06:00
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#ifdef CONFIG_PERF_EVENTS
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2010-08-10 21:47:59 -06:00
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int perf_refcount;
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struct hlist_head __percpu *perf_events;
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#endif
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2009-04-13 09:20:49 -06:00
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};
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2010-11-17 18:11:42 -07:00
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#define __TRACE_EVENT_FLAGS(name, value) \
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static int __init trace_init_flags_##name(void) \
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{ \
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event_##name.flags = value; \
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return 0; \
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} \
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early_initcall(trace_init_flags_##name);
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2010-03-04 21:35:37 -07:00
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#define PERF_MAX_TRACE_SIZE 2048
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2009-09-12 17:04:54 -06:00
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#define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */
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2009-04-13 09:20:49 -06:00
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2009-05-05 20:33:04 -06:00
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extern void destroy_preds(struct ftrace_event_call *call);
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2009-10-14 21:21:42 -06:00
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extern int filter_match_preds(struct event_filter *filter, void *rec);
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2009-09-02 12:17:06 -06:00
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extern int filter_current_check_discard(struct ring_buffer *buffer,
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struct ftrace_event_call *call,
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2009-04-13 09:20:49 -06:00
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void *rec,
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struct ring_buffer_event *event);
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2009-08-06 20:33:22 -06:00
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enum {
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FILTER_OTHER = 0,
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FILTER_STATIC_STRING,
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FILTER_DYN_STRING,
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2009-08-06 20:33:43 -06:00
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FILTER_PTR_STRING,
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2012-02-15 07:51:53 -07:00
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FILTER_TRACE_FN,
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2009-08-06 20:33:22 -06:00
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};
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2010-11-12 20:32:11 -07:00
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#define EVENT_STORAGE_SIZE 128
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extern struct mutex event_storage_mutex;
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extern char event_storage[EVENT_STORAGE_SIZE];
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2009-12-07 20:14:20 -07:00
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extern int trace_event_raw_init(struct ftrace_event_call *call);
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2009-08-26 21:09:51 -06:00
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extern int trace_define_field(struct ftrace_event_call *call, const char *type,
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const char *name, int offset, int size,
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int is_signed, int filter_type);
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2009-08-13 14:34:53 -06:00
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extern int trace_add_event_call(struct ftrace_event_call *call);
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extern void trace_remove_event_call(struct ftrace_event_call *call);
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2009-04-13 09:20:49 -06:00
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2009-04-28 02:04:53 -06:00
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#define is_signed_type(type) (((type)(-1)) < 0)
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2009-05-08 14:27:41 -06:00
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int trace_set_clr_event(const char *system, const char *event, int set);
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2009-04-13 09:20:49 -06:00
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/*
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* The double __builtin_constant_p is because gcc will give us an error
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* if we try to allocate the static variable to fmt if it is not a
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* constant. Even with the outer if statement optimizing out.
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*/
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#define event_trace_printk(ip, fmt, args...) \
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do { \
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__trace_printk_check_format(fmt, ##args); \
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tracing_record_cmdline(current); \
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if (__builtin_constant_p(fmt)) { \
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static const char *trace_printk_fmt \
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__attribute__((section("__trace_printk_fmt"))) = \
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__builtin_constant_p(fmt) ? fmt : NULL; \
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\
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__trace_bprintk(ip, trace_printk_fmt, ##args); \
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} else \
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__trace_printk(ip, fmt, ##args); \
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} while (0)
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2009-12-20 23:27:35 -07:00
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#ifdef CONFIG_PERF_EVENTS
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2009-10-14 21:21:42 -06:00
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struct perf_event;
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2010-03-02 23:16:16 -07:00
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DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
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2010-05-19 06:02:22 -06:00
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extern int perf_trace_init(struct perf_event *event);
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extern void perf_trace_destroy(struct perf_event *event);
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perf: Rework the PMU methods
Replace pmu::{enable,disable,start,stop,unthrottle} with
pmu::{add,del,start,stop}, all of which take a flags argument.
The new interface extends the capability to stop a counter while
keeping it scheduled on the PMU. We replace the throttled state with
the generic stopped state.
This also allows us to efficiently stop/start counters over certain
code paths (like IRQ handlers).
It also allows scheduling a counter without it starting, allowing for
a generic frozen state (useful for rotating stopped counters).
The stopped state is implemented in two different ways, depending on
how the architecture implemented the throttled state:
1) We disable the counter:
a) the pmu has per-counter enable bits, we flip that
b) we program a NOP event, preserving the counter state
2) We store the counter state and ignore all read/overflow events
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: paulus <paulus@samba.org>
Cc: stephane eranian <eranian@googlemail.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Yanmin <yanmin_zhang@linux.intel.com>
Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
Cc: David Miller <davem@davemloft.net>
Cc: Michael Cree <mcree@orcon.net.nz>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-06-16 06:37:10 -06:00
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extern int perf_trace_add(struct perf_event *event, int flags);
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extern void perf_trace_del(struct perf_event *event, int flags);
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2010-05-19 06:02:22 -06:00
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extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
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2009-10-14 21:21:42 -06:00
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char *filter_str);
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extern void ftrace_profile_free_filter(struct perf_event *event);
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2010-05-19 02:52:27 -06:00
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extern void *perf_trace_buf_prepare(int size, unsigned short type,
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struct pt_regs *regs, int *rctxp);
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2010-01-27 18:32:29 -07:00
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static inline void
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2010-03-04 21:35:37 -07:00
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perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr,
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2012-07-11 08:14:58 -06:00
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u64 count, struct pt_regs *regs, void *head,
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struct task_struct *task)
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2010-01-27 18:32:29 -07:00
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{
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2012-07-11 08:14:58 -06:00
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perf_tp_event(addr, count, raw_data, size, regs, head, rctx, task);
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2010-01-27 18:32:29 -07:00
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}
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2009-10-14 21:21:42 -06:00
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#endif
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2009-04-13 09:20:49 -06:00
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#endif /* _LINUX_FTRACE_EVENT_H */
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