#ifndef _LINUX_KERNEL_TRACE_H#define _LINUX_KERNEL_TRACE_H #include <linux/fs.h>#include <linux/atomic.h>#include <linux/sched.h>#include <linux/clocksource.h>#include <linux/ring_buffer.h>#include <linux/mmiotrace.h>#include <linux/tracepoint.h>#include <linux/ftrace.h>#include <linux/hw_breakpoint.h>#include <linux/trace_seq.h>#include <linux/ftrace_event.h> enum trace_type {	__TRACE_FIRST_TYPE = 0, 	TRACE_FN,	TRACE_CTX,	TRACE_WAKE,	TRACE_STACK,	TRACE_PRINT,	TRACE_BPRINT,	TRACE_MMIO_RW,	TRACE_MMIO_MAP,	TRACE_BRANCH,	TRACE_GRAPH_RET,	TRACE_GRAPH_ENT,	TRACE_USER_STACK,	TRACE_BLK, 	__TRACE_LAST_TYPE,};  #undef __field#define __field(type, item)		type	item; #undef __field_struct#define __field_struct(type, item)	__field(type, item) #undef __field_desc#define __field_desc(type, container, item) #undef __array#define __array(type, item, size)	type	item[size]; #undef __array_desc#define __array_desc(type, container, item, size) #undef __dynamic_array#define __dynamic_array(type, item)	type	item[]; #undef F_STRUCT#define F_STRUCT(args...)		args #undef FTRACE_ENTRY#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter)	\	struct struct_name {						\		struct trace_entry	ent;				\		tstruct							\	} #undef TP_ARGS#define TP_ARGS(args...)	args #undef FTRACE_ENTRY_DUP#define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk, filter) #undef FTRACE_ENTRY_REG#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print,	\			 filter, regfn) \	FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \		     filter) #include "trace_entries.h" /* * syscalls are special, and need special handling, this is why * they are not included in trace_entries.h */struct syscall_trace_enter {	struct trace_entry	ent;	int			nr;	unsigned long		args[];}; struct syscall_trace_exit {	struct trace_entry	ent;	int			nr;	long			ret;}; struct kprobe_trace_entry_head {	struct trace_entry	ent;	unsigned long		ip;}; struct kretprobe_trace_entry_head {	struct trace_entry	ent;	unsigned long		func;	unsigned long		ret_ip;}; /* * trace_flag_type is an enumeration that holds different * states when a trace occurs. These are: *  IRQS_OFF		- interrupts were disabled *  IRQS_NOSUPPORT	- arch does not support irqs_disabled_flags *  NEED_RESCHED	- reschedule is requested *  HARDIRQ		- inside an interrupt handler *  SOFTIRQ		- inside a softirq handler */enum trace_flag_type {	TRACE_FLAG_IRQS_OFF		= 0x01,	TRACE_FLAG_IRQS_NOSUPPORT	= 0x02,	TRACE_FLAG_NEED_RESCHED		= 0x04,	TRACE_FLAG_HARDIRQ		= 0x08,	TRACE_FLAG_SOFTIRQ		= 0x10,}; #define TRACE_BUF_SIZE		1024 /* * The CPU trace array - it consists of thousands of trace entries * plus some other descriptor data: (for example which task started * the trace, etc.) */struct trace_array_cpu {	atomic_t		disabled;	void			*buffer_page;	/* ring buffer spare */ 	unsigned long		saved_latency;	unsigned long		critical_start;	unsigned long		critical_end;	unsigned long		critical_sequence;	unsigned long		nice;	unsigned long		policy;	unsigned long		rt_priority;	unsigned long		skipped_entries;	cycle_t			preempt_timestamp;	pid_t			pid;	uid_t			uid;	char			comm[TASK_COMM_LEN];}; /* * The trace array - an array of per-CPU trace arrays. This is the * highest level data structure that individual tracers deal with. * They have on/off state as well: */struct trace_array {	struct ring_buffer	*buffer;	unsigned long		entries;	int			cpu;	int			buffer_disabled;	cycle_t			time_start;	struct task_struct	*waiter;	struct trace_array_cpu	*data[NR_CPUS];}; #define FTRACE_CMP_TYPE(var, type) \	__builtin_types_compatible_p(typeof(var), type *) #undef IF_ASSIGN#define IF_ASSIGN(var, entry, etype, id)		\	if (FTRACE_CMP_TYPE(var, etype)) {		\		var = (typeof(var))(entry);		\		WARN_ON(id && (entry)->type != id);	\		break;					\	} /* Will cause compile errors if type is not found. */extern void __ftrace_bad_type(void); /* * The trace_assign_type is a verifier that the entry type is * the same as the type being assigned. To add new types simply * add a line with the following format: * * IF_ASSIGN(var, ent, type, id); * *  Where "type" is the trace type that includes the trace_entry *  as the "ent" item. And "id" is the trace identifier that is *  used in the trace_type enum. * *  If the type can have more than one id, then use zero. */#define trace_assign_type(var, ent)					\	do {								\		IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN);	\		IF_ASSIGN(var, ent, struct ctx_switch_entry, 0);	\		IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK);	\		IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\		IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT);	\		IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT);	\		IF_ASSIGN(var, ent, struct trace_mmiotrace_rw,		\			  TRACE_MMIO_RW);				\		IF_ASSIGN(var, ent, struct trace_mmiotrace_map,		\			  TRACE_MMIO_MAP);				\		IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \		IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry,	\			  TRACE_GRAPH_ENT);		\		IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry,	\			  TRACE_GRAPH_RET);		\		__ftrace_bad_type();					\	} while (0) /* * An option specific to a tracer. This is a boolean value. * The bit is the bit index that sets its value on the * flags value in struct tracer_flags. */struct tracer_opt {	const char	*name; /* Will appear on the trace_options file */	u32		bit; /* Mask assigned in val field in tracer_flags */}; /* * The set of specific options for a tracer. Your tracer * have to set the initial value of the flags val. */struct tracer_flags {	u32			val;	struct tracer_opt	*opts;}; /* Makes more easy to define a tracer opt */#define TRACER_OPT(s, b)	.name = #s, .bit = b  /** * struct tracer - a specific tracer and its callbacks to interact with debugfs * @name: the name chosen to select it on the available_tracers file * @init: called when one switches to this tracer (echo name > current_tracer) * @reset: called when one switches to another tracer * @start: called when tracing is unpaused (echo 1 > tracing_enabled) * @stop: called when tracing is paused (echo 0 > tracing_enabled) * @open: called when the trace file is opened * @pipe_open: called when the trace_pipe file is opened * @wait_pipe: override how the user waits for traces on trace_pipe * @close: called when the trace file is released * @pipe_close: called when the trace_pipe file is released * @read: override the default read callback on trace_pipe * @splice_read: override the default splice_read callback on trace_pipe * @selftest: selftest to run on boot (see trace_selftest.c) * @print_headers: override the first lines that describe your columns * @print_line: callback that prints a trace * @set_flag: signals one of your private flags changed (trace_options file) * @flags: your private flags */struct tracer {	const char		*name;	int			(*init)(struct trace_array *tr);	void			(*reset)(struct trace_array *tr);	void			(*start)(struct trace_array *tr);	void			(*stop)(struct trace_array *tr);	void			(*open)(struct trace_iterator *iter);	void			(*pipe_open)(struct trace_iterator *iter);	void			(*wait_pipe)(struct trace_iterator *iter);	void			(*close)(struct trace_iterator *iter);	void			(*pipe_close)(struct trace_iterator *iter);	ssize_t			(*read)(struct trace_iterator *iter,					struct file *filp, char __user *ubuf,					size_t cnt, loff_t *ppos);	ssize_t			(*splice_read)(struct trace_iterator *iter,					       struct file *filp,					       loff_t *ppos,					       struct pipe_inode_info *pipe,					       size_t len,					       unsigned int flags);#ifdef CONFIG_FTRACE_STARTUP_TEST	int			(*selftest)(struct tracer *trace,					    struct trace_array *tr);#endif	void			(*print_header)(struct seq_file *m);	enum print_line_t	(*print_line)(struct trace_iterator *iter);	/* If you handled the flag setting, return 0 */	int			(*set_flag)(u32 old_flags, u32 bit, int set);	struct tracer		*next;	struct tracer_flags	*flags;	int			print_max;	int			use_max_tr;};  /* Only current can touch trace_recursion */#define trace_recursion_inc() do { (current)->trace_recursion++; } while (0)#define trace_recursion_dec() do { (current)->trace_recursion--; } while (0) /* Ring buffer has the 10 LSB bits to count */#define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff) /* for function tracing recursion */#define TRACE_INTERNAL_BIT		(1<<11)#define TRACE_GLOBAL_BIT		(1<<12)#define TRACE_CONTROL_BIT		(1<<13) /* * Abuse of the trace_recursion. * As we need a way to maintain state if we are tracing the function * graph in irq because we want to trace a particular function that * was called in irq context but we have irq tracing off. Since this * can only be modified by current, we can reuse trace_recursion. */#define TRACE_IRQ_BIT			(1<<13) #define trace_recursion_set(bit)	do { (current)->trace_recursion |= (bit); } while (0)#define trace_recursion_clear(bit)	do { (current)->trace_recursion &= ~(bit); } while (0)#define trace_recursion_test(bit)	((current)->trace_recursion & (bit)) #define TRACE_PIPE_ALL_CPU	-1 int tracer_init(struct tracer *t, struct trace_array *tr);int tracing_is_enabled(void);void trace_wake_up(void);void tracing_reset(struct trace_array *tr, int cpu);void tracing_reset_online_cpus(struct trace_array *tr);void tracing_reset_current(int cpu);void tracing_reset_current_online_cpus(void);int tracing_open_generic(struct inode *inode, struct file *filp);struct dentry *trace_create_file(const char *name,				 umode_t mode,				 struct dentry *parent,				 void *data,				 const struct file_operations *fops); struct dentry *tracing_init_dentry(void); struct ring_buffer_event; struct ring_buffer_event *trace_buffer_lock_reserve(struct ring_buffer *buffer,			  int type,			  unsigned long len,			  unsigned long flags,			  int pc);void trace_buffer_unlock_commit(struct ring_buffer *buffer,				struct ring_buffer_event *event,				unsigned long flags, int pc); struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,						struct trace_array_cpu *data); struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,					  int *ent_cpu, u64 *ent_ts); int trace_empty(struct trace_iterator *iter); void *trace_find_next_entry_inc(struct trace_iterator *iter); void trace_init_global_iter(struct trace_iterator *iter); void tracing_iter_reset(struct trace_iterator *iter, int cpu); void default_wait_pipe(struct trace_iterator *iter);void poll_wait_pipe(struct trace_iterator *iter); void ftrace(struct trace_array *tr,			    struct trace_array_cpu *data,			    unsigned long ip,			    unsigned long parent_ip,			    unsigned long flags, int pc);void tracing_sched_switch_trace(struct trace_array *tr,				struct task_struct *prev,				struct task_struct *next,				unsigned long flags, int pc); void tracing_sched_wakeup_trace(struct trace_array *tr,				struct task_struct *wakee,				struct task_struct *cur,				unsigned long flags, int pc);void trace_function(struct trace_array *tr,		    unsigned long ip,		    unsigned long parent_ip,		    unsigned long flags, int pc);void trace_graph_function(struct trace_array *tr,		    unsigned long ip,		    unsigned long parent_ip,		    unsigned long flags, int pc);void trace_latency_header(struct seq_file *m);void trace_default_header(struct seq_file *m);void print_trace_header(struct seq_file *m, struct trace_iterator *iter);int trace_empty(struct trace_iterator *iter); void trace_graph_return(struct ftrace_graph_ret *trace);int trace_graph_entry(struct ftrace_graph_ent *trace);void set_graph_array(struct trace_array *tr); void tracing_start_cmdline_record(void);void tracing_stop_cmdline_record(void);void tracing_sched_switch_assign_trace(struct trace_array *tr);void tracing_stop_sched_switch_record(void);void tracing_start_sched_switch_record(void);int register_tracer(struct tracer *type);void unregister_tracer(struct tracer *type);int is_tracing_stopped(void);enum trace_file_type {	TRACE_FILE_LAT_FMT	= 1,	TRACE_FILE_ANNOTATE	= 2,}; extern cpumask_var_t __read_mostly tracing_buffer_mask; #define for_each_tracing_cpu(cpu)	\	for_each_cpu(cpu, tracing_buffer_mask) extern unsigned long nsecs_to_usecs(unsigned long nsecs); extern unsigned long tracing_thresh; #ifdef CONFIG_TRACER_MAX_TRACEextern unsigned long tracing_max_latency; void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);void update_max_tr_single(struct trace_array *tr,			  struct task_struct *tsk, int cpu);#endif /* CONFIG_TRACER_MAX_TRACE */ #ifdef CONFIG_STACKTRACEvoid ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags,			int skip, int pc); void ftrace_trace_stack_regs(struct ring_buffer *buffer, unsigned long flags,			     int skip, int pc, struct pt_regs *regs); void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,			    int pc); void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,		   int pc);#elsestatic inline void ftrace_trace_stack(struct ring_buffer *buffer,				      unsigned long flags, int skip, int pc){} static inline void ftrace_trace_stack_regs(struct ring_buffer *buffer,					   unsigned long flags, int skip,					   int pc, struct pt_regs *regs){} static inline void ftrace_trace_userstack(struct ring_buffer *buffer,					  unsigned long flags, int pc){} static inline void __trace_stack(struct trace_array *tr, unsigned long flags,				 int skip, int pc){}#endif /* CONFIG_STACKTRACE */ extern cycle_t ftrace_now(int cpu); extern void trace_find_cmdline(int pid, char comm[]); #ifdef CONFIG_DYNAMIC_FTRACEextern unsigned long ftrace_update_tot_cnt;#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_funcextern int DYN_FTRACE_TEST_NAME(void);#define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2extern int DYN_FTRACE_TEST_NAME2(void);#endif extern int ring_buffer_expanded;extern bool tracing_selftest_disabled;DECLARE_PER_CPU(int, ftrace_cpu_disabled); #ifdef CONFIG_FTRACE_STARTUP_TESTextern int trace_selftest_startup_function(struct tracer *trace,					   struct trace_array *tr);extern int trace_selftest_startup_function_graph(struct tracer *trace,						 struct trace_array *tr);extern int trace_selftest_startup_irqsoff(struct tracer *trace,					  struct trace_array *tr);extern int trace_selftest_startup_preemptoff(struct tracer *trace,					     struct trace_array *tr);extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,						 struct trace_array *tr);extern int trace_selftest_startup_wakeup(struct tracer *trace,					 struct trace_array *tr);extern int trace_selftest_startup_nop(struct tracer *trace,					 struct trace_array *tr);extern int trace_selftest_startup_sched_switch(struct tracer *trace,					       struct trace_array *tr);extern int trace_selftest_startup_branch(struct tracer *trace,					 struct trace_array *tr);#endif /* CONFIG_FTRACE_STARTUP_TEST */ extern void *head_page(struct trace_array_cpu *data);extern unsigned long long ns2usecs(cycle_t nsec);extern inttrace_vbprintk(unsigned long ip, const char *fmt, va_list args);extern inttrace_vprintk(unsigned long ip, const char *fmt, va_list args);extern inttrace_array_vprintk(struct trace_array *tr,

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