#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/trace.h>
#include <linux/hw_breakpoint.h>
#include <linux/trace_seq.h>
#include <linux/trace_events.h>
#include <linux/compiler.h>
#include <linux/glob.h>
#include <linux/irq_work.h>
#include <linux/workqueue.h>
#include <linux/ctype.h>
#include <linux/once_lite.h>
#include "pid_list.h"
#ifdef CONFIG_FTRACE_SYSCALLS
#include <asm/unistd.h> /* For NR_syscalls */
#include <asm/syscall.h> /* some archs define it here */
#endif
#define TRACE_MODE_WRITE 0640
#define TRACE_MODE_READ 0440
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_BPUTS,
TRACE_HWLAT,
TRACE_OSNOISE,
TRACE_TIMERLAT,
TRACE_RAW_DATA,
TRACE_FUNC_REPEATS,
__TRACE_LAST_TYPE,
};
#undef __field
#define __field(type, item) type item;
#undef __field_fn
#define __field_fn(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 __field_packed
#define __field_packed(type, container, item)
#undef __array
#define __array(type, item, size) type item[size];
#undef __stack_array
#define __stack_array(type, item, size, field) type item[] __counted_by(field);
#undef __array_desc
#define __array_desc(type, container, item, size)
#undef __dynamic_array
#define __dynamic_array(type, item) type item[];
#undef __rel_dynamic_array
#define __rel_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) \
struct struct_name { \
struct trace_entry ent; \
tstruct \
}
#undef FTRACE_ENTRY_DUP
#define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk)
#undef FTRACE_ENTRY_REG
#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, regfn) \
FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
#undef FTRACE_ENTRY_PACKED
#define FTRACE_ENTRY_PACKED(name, struct_name, id, tstruct, print) \
FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print)) __packed
#include "trace_entries.h"
#define MEM_FAIL(condition, fmt, ...) \
DO_ONCE_LITE_IF(condition, pr_err, "ERROR: " fmt, ##__VA_ARGS__)
#define FAULT_STRING "(fault)"
#define HIST_STACKTRACE_DEPTH 16
#define HIST_STACKTRACE_SIZE (HIST_STACKTRACE_DEPTH * sizeof(unsigned long))
#define HIST_STACKTRACE_SKIP 5
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 eprobe_trace_entry_head {
struct trace_entry ent;
};
struct kretprobe_trace_entry_head {
struct trace_entry ent;
unsigned long func;
unsigned long ret_ip;
};
struct fentry_trace_entry_head {
struct trace_entry ent;
unsigned long ip;
};
struct fexit_trace_entry_head {
struct trace_entry ent;
unsigned long func;
unsigned long ret_ip;
};
#define TRACE_BUF_SIZE 1024
struct trace_array;
struct trace_array_cpu {
atomic_t disabled;
void *buffer_page;
unsigned long entries;
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;
u64 preempt_timestamp;
pid_t pid;
kuid_t uid;
char comm[TASK_COMM_LEN];
#ifdef CONFIG_FUNCTION_TRACER
int ftrace_ignore_pid;
#endif
bool ignore_pid;
};
struct tracer;
struct trace_option_dentry;
struct array_buffer {
struct trace_array *tr;
struct trace_buffer *buffer;
struct trace_array_cpu __percpu *data;
u64 time_start;
int cpu;
};
#define TRACE_FLAGS_MAX_SIZE 32
struct trace_options {
struct tracer *tracer;
struct trace_option_dentry *topts;
};
struct trace_pid_list *trace_pid_list_alloc(void);
void trace_pid_list_free(struct trace_pid_list *pid_list);
bool trace_pid_list_is_set(struct trace_pid_list *pid_list, unsigned int pid);
int trace_pid_list_set(struct trace_pid_list *pid_list, unsigned int pid);
int trace_pid_list_clear(struct trace_pid_list *pid_list, unsigned int pid);
int trace_pid_list_first(struct trace_pid_list *pid_list, unsigned int *pid);
int trace_pid_list_next(struct trace_pid_list *pid_list, unsigned int pid,
unsigned int *next);
enum {
TRACE_PIDS = BIT(0),
TRACE_NO_PIDS = BIT(1),
};
static inline bool pid_type_enabled(int type, struct trace_pid_list *pid_list,
struct trace_pid_list *no_pid_list)
{
return ((type & TRACE_PIDS) && pid_list) ||
((type & TRACE_NO_PIDS) && no_pid_list);
}
static inline bool still_need_pid_events(int type, struct trace_pid_list *pid_list,
struct trace_pid_list *no_pid_list)
{
return (!(type & TRACE_PIDS) && pid_list) ||
(!(type & TRACE_NO_PIDS) && no_pid_list);
}
typedef bool (*cond_update_fn_t)(struct trace_array *tr, void *cond_data);
struct cond_snapshot {
void *cond_data;
cond_update_fn_t update;
};
struct trace_func_repeats {
unsigned long ip;
unsigned long parent_ip;
unsigned long count;
u64 ts_last_call;
};
struct trace_array {
struct list_head list;
char *name;
struct array_buffer array_buffer;
#ifdef CONFIG_TRACER_MAX_TRACE
struct array_buffer max_buffer;
bool allocated_snapshot;
#endif
#ifdef CONFIG_TRACER_MAX_TRACE
unsigned long max_latency;
#ifdef CONFIG_FSNOTIFY
struct dentry *d_max_latency;
struct work_struct fsnotify_work;
struct irq_work fsnotify_irqwork;
#endif
#endif
struct trace_pid_list __rcu *filtered_pids;
struct trace_pid_list __rcu *filtered_no_pids;
arch_spinlock_t max_lock;
int buffer_disabled;
#ifdef CONFIG_FTRACE_SYSCALLS
int sys_refcount_enter;
int sys_refcount_exit;
struct trace_event_file __rcu *enter_syscall_files[NR_syscalls];
struct trace_event_file __rcu *exit_syscall_files[NR_syscalls];
#endif
int stop_count;
int clock_id;
int nr_topts;
bool clear_trace;
int buffer_percent;
unsigned int n_err_log_entries;
struct tracer *current_trace;
unsigned int trace_flags;
unsigned char trace_flags_index[TRACE_FLAGS_MAX_SIZE];
unsigned int flags;
raw_spinlock_t start_lock;
struct list_head err_log;
struct dentry *dir;
struct dentry *options;
struct dentry *percpu_dir;
struct dentry *event_dir;
struct trace_options *topts;
struct list_head systems;
struct list_head events;
struct trace_event_file *trace_marker_file;
cpumask_var_t tracing_cpumask;
cpumask_var_t pipe_cpumask;
int ref;
int trace_ref;
#ifdef CONFIG_FUNCTION_TRACER
struct ftrace_ops *ops;
struct trace_pid_list __rcu *function_pids;
struct trace_pid_list __rcu *function_no_pids;
#ifdef CONFIG_DYNAMIC_FTRACE
struct list_head func_probes;
struct list_head mod_trace;
struct list_head mod_notrace;
#endif
int function_enabled;
#endif
int no_filter_buffering_ref;
struct list_head hist_vars;
#ifdef CONFIG_TRACER_SNAPSHOT
struct cond_snapshot *cond_snapshot;
#endif
struct trace_func_repeats __percpu *last_func_repeats;
};
enum {
TRACE_ARRAY_FL_GLOBAL = (1 << 0)
};
extern struct list_head ftrace_trace_arrays;
extern struct mutex trace_types_lock;
extern int trace_array_get(struct trace_array *tr);
extern int tracing_check_open_get_tr(struct trace_array *tr);
extern struct trace_array *trace_array_find(const char *instance);
extern struct trace_array *trace_array_find_get(const char *instance);
extern u64 tracing_event_time_stamp(struct trace_buffer *buffer, struct ring_buffer_event *rbe);
extern int tracing_set_filter_buffering(struct trace_array *tr, bool set);
extern int tracing_set_clock(struct trace_array *tr, const char *clockstr);
extern bool trace_clock_in_ns(struct trace_array *tr);
static inline struct trace_array *top_trace_array(void)
{
struct trace_array *tr;
if (list_empty(&ftrace_trace_arrays))
return NULL;
tr = list_entry(ftrace_trace_arrays.prev,
typeof(*tr), list);
WARN_ON(!(tr->flags & TRACE_ARRAY_FL_GLOBAL));
return tr;
}
#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 != 0 && (entry)->type != id); \
break; \
}
extern void __ftrace_bad_type(void);
#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 bputs_entry, TRACE_BPUTS); \
IF_ASSIGN(var, ent, struct hwlat_entry, TRACE_HWLAT); \
IF_ASSIGN(var, ent, struct osnoise_entry, TRACE_OSNOISE);\
IF_ASSIGN(var, ent, struct timerlat_entry, TRACE_TIMERLAT);\
IF_ASSIGN(var, ent, struct raw_data_entry, TRACE_RAW_DATA);\
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); \
IF_ASSIGN(var, ent, struct func_repeats_entry, \
TRACE_FUNC_REPEATS); \
__ftrace_bad_type(); \
} while (0)
struct tracer_opt {
const char *name;
u32 bit;
};
struct tracer_flags {
u32 val;
struct tracer_opt *opts;
struct tracer *trace;
};
#define TRACER_OPT(s, b) .name = #s, .bit = b
struct trace_option_dentry {
struct tracer_opt *opt;
struct tracer_flags *flags;
struct trace_array *tr;
struct dentry *entry;
};
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);
int (*update_thresh)(struct trace_array *tr);
void (*open)(struct trace_iterator *iter);
void (*pipe_open)(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);
int (*set_flag)(struct trace_array *tr,
u32 old_flags, u32 bit, int set);
int (*flag_changed)(struct trace_array *tr,
u32 mask, int set);
struct tracer *next;
struct tracer_flags *flags;
int enabled;
bool print_max;
bool allow_instances;
#ifdef CONFIG_TRACER_MAX_TRACE
bool use_max_tr;
#endif
bool noboot;
};
static inline struct ring_buffer_iter *
trace_buffer_iter(struct trace_iterator *iter, int cpu)
{
return iter->buffer_iter ? iter->buffer_iter[cpu] : NULL;
}
int tracer_init(struct tracer *t, struct trace_array *tr);
int tracing_is_enabled(void);
void tracing_reset_online_cpus(struct array_buffer *buf);
void tracing_reset_all_online_cpus(void);
void tracing_reset_all_online_cpus_unlocked(void);
int tracing_open_generic(struct inode *inode, struct file *filp);
int tracing_open_generic_tr(struct inode *inode, struct file *filp);
int tracing_open_file_tr(struct inode *inode, struct file *filp);
int tracing_release_file_tr(struct inode *inode, struct file *filp);
bool tracing_is_disabled(void);
bool tracer_tracing_is_on(struct trace_array *tr);
void tracer_tracing_on(struct trace_array *tr);
void tracer_tracing_off(struct trace_array *tr);
struct dentry *trace_create_file(const char *name,
umode_t mode,
struct dentry *parent,
void *data,
const struct file_operations *fops);
int tracing_init_dentry(void);
struct ring_buffer_event;
struct ring_buffer_event *
trace_buffer_lock_reserve(struct trace_buffer *buffer,
int type,
unsigned long len,
unsigned int trace_ctx);
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);
void trace_buffer_unlock_commit_nostack(struct trace_buffer *buffer,
struct ring_buffer_event *event);
bool trace_is_tracepoint_string(const char *str);
const char *trace_event_format(struct trace_iterator *iter, const char *fmt);
void trace_check_vprintf(struct trace_iterator *iter, const char *fmt,
va_list ap) __printf(2, 0);
char *trace_iter_expand_format(struct trace_iterator *iter);
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);
unsigned long trace_total_entries_cpu(struct trace_array *tr, int cpu);
unsigned long trace_total_entries(struct trace_array *tr);
void trace_function(struct trace_array *tr,
unsigned long ip,
unsigned long parent_ip,
unsigned int trace_ctx);
void trace_graph_function(struct trace_array *tr,
unsigned long ip,
unsigned long parent_ip,
unsigned int trace_ctx);
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);
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_start_tgid_record(void);
void tracing_stop_tgid_record(void);
int register_tracer(struct tracer *type);
int is_tracing_stopped(void);
loff_t tracing_lseek(struct file *file, loff_t offset, int whence);
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;
extern int pid_max;
bool trace_find_filtered_pid(struct trace_pid_list *filtered_pids,
pid_t search_pid);
bool trace_ignore_this_task(struct trace_pid_list *filtered_pids,
struct trace_pid_list *filtered_no_pids,
struct task_struct *task);
void trace_filter_add_remove_task(struct trace_pid_list *pid_list,
struct task_struct *self,
struct task_struct *task);
void *trace_pid_next(struct trace_pid_list *pid_list, void *v, loff_t *pos);
void *trace_pid_start(struct trace_pid_list *pid_list, loff_t *pos);
int trace_pid_show(struct seq_file *m, void *v);
int trace_pid_write(struct trace_pid_list *filtered_pids,
struct trace_pid_list **new_pid_list,
const char __user *ubuf, size_t cnt);
#ifdef CONFIG_TRACER_MAX_TRACE
void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu,
void *cond_data);
void update_max_tr_single(struct trace_array *tr,
struct task_struct *tsk, int cpu);
#ifdef CONFIG_FSNOTIFY
#define LATENCY_FS_NOTIFY
#endif
#endif /* CONFIG_TRACER_MAX_TRACE */
#ifdef LATENCY_FS_NOTIFY
void latency_fsnotify(struct trace_array *tr);
#else
static inline void latency_fsnotify(struct trace_array *tr) { }
#endif
#ifdef CONFIG_STACKTRACE
void __trace_stack(struct trace_array *tr, unsigned int trace_ctx, int skip);
#else
static inline void __trace_stack(struct trace_array *tr, unsigned int trace_ctx,
int skip)
{
}
#endif /* CONFIG_STACKTRACE */
void trace_last_func_repeats(struct trace_array *tr,
struct trace_func_repeats *last_info,
unsigned int trace_ctx);
extern u64 ftrace_now(int cpu);
extern void trace_find_cmdline(int pid, char comm[]);
extern int trace_find_tgid(int pid);
extern void trace_event_follow_fork(struct trace_array *tr, bool enable);
#ifdef CONFIG_DYNAMIC_FTRACE
extern unsigned long ftrace_update_tot_cnt;
extern unsigned long ftrace_number_of_pages;
extern unsigned long ftrace_number_of_groups;
void ftrace_init_trace_array(struct trace_array *tr);
#else
static inline void ftrace_init_trace_array(struct trace_array *tr) { }
#endif
#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
extern int DYN_FTRACE_TEST_NAME(void);
#define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2
extern int DYN_FTRACE_TEST_NAME2(void);
extern bool ring_buffer_expanded;
extern bool tracing_selftest_disabled;
#ifdef CONFIG_FTRACE_STARTUP_TEST
extern void __init disable_tracing_selftest(const char *reason);
extern 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_branch(struct tracer *trace,
struct trace_array *tr);
#define __tracer_data __refdata
#else
static inline void __init disable_tracing_selftest(const char *reason)
{
}
#define __tracer_data __read_mostly
#endif /* CONFIG_FTRACE_STARTUP_TEST */
extern void *head_page(struct trace_array_cpu *data);
extern unsigned long long ns2usecs(u64 nsec);
extern int
trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
extern int
trace_vprintk(unsigned long ip, const char *fmt, va_list args);
extern int
trace_array_vprintk(struct trace_array *tr,
unsigned long ip, const char *fmt, va_list args);
int trace_array_printk_buf(struct trace_buffer *buffer,
unsigned long ip, const char *fmt, ...);
void trace_printk_seq(struct trace_seq *s);
enum print_line_t print_trace_line(struct trace_iterator *iter);
extern char trace_find_mark(unsigned long long duration);
struct ftrace_hash;
struct ftrace_mod_load {
struct list_head list;
char *func;
char *module;
int enable;
};
enum {
FTRACE_HASH_FL_MOD = (1 << 0),
};
struct ftrace_hash {
unsigned long size_bits;
struct hlist_head *buckets;
unsigned long count;
unsigned long flags;
struct rcu_head rcu;
};
struct ftrace_func_entry *
ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
static __always_inline bool ftrace_hash_empty(struct ftrace_hash *hash)
{
return !hash || !(hash->count || (hash->flags & FTRACE_HASH_FL_MOD));
}
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
#define TRACE_GRAPH_PRINT_OVERRUN 0x1
#define TRACE_GRAPH_PRINT_CPU 0x2
#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
#define TRACE_GRAPH_PRINT_PROC 0x8
#define TRACE_GRAPH_PRINT_DURATION 0x10
#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
#define TRACE_GRAPH_PRINT_REL_TIME 0x40
#define TRACE_GRAPH_PRINT_IRQS 0x80
#define TRACE_GRAPH_PRINT_TAIL 0x100
#define TRACE_GRAPH_SLEEP_TIME 0x200
#define TRACE_GRAPH_GRAPH_TIME 0x400
#define TRACE_GRAPH_PRINT_RETVAL 0x800
#define TRACE_GRAPH_PRINT_RETVAL_HEX 0x1000
#define TRACE_GRAPH_PRINT_FILL_SHIFT 28
#define TRACE_GRAPH_PRINT_FILL_MASK (0x3 << TRACE_GRAPH_PRINT_FILL_SHIFT)
extern void ftrace_graph_sleep_time_control(bool enable);
#ifdef CONFIG_FUNCTION_PROFILER
extern void ftrace_graph_graph_time_control(bool enable);
#else
static inline void ftrace_graph_graph_time_control(bool enable) { }
#endif
extern enum print_line_t
print_graph_function_flags(struct trace_iterator *iter, u32 flags);
extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
extern void
trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
extern void graph_trace_open(struct trace_iterator *iter);
extern void graph_trace_close(struct trace_iterator *iter);
extern int __trace_graph_entry(struct trace_array *tr,
struct ftrace_graph_ent *trace,
unsigned int trace_ctx);
extern void __trace_graph_return(struct trace_array *tr,
struct ftrace_graph_ret *trace,
unsigned int trace_ctx);
#ifdef CONFIG_DYNAMIC_FTRACE
extern struct ftrace_hash __rcu *ftrace_graph_hash;
extern struct ftrace_hash __rcu *ftrace_graph_notrace_hash;
static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
{
unsigned long addr = trace->func;
int ret = 0;
struct ftrace_hash *hash;
preempt_disable_notrace();
hash = rcu_dereference_protected(ftrace_graph_hash, !preemptible());
if (ftrace_hash_empty(hash)) {
ret = 1;
goto out;
}
if (ftrace_lookup_ip(hash, addr)) {
trace_recursion_set(TRACE_GRAPH_BIT);
trace_recursion_set_depth(trace->depth);
if (in_hardirq())
trace_recursion_set(TRACE_IRQ_BIT);
else
trace_recursion_clear(TRACE_IRQ_BIT);
ret = 1;
}
out:
preempt_enable_notrace();
return ret;
}
static inline void ftrace_graph_addr_finish(struct ftrace_graph_ret *trace)
{
if (trace_recursion_test(TRACE_GRAPH_BIT) &&
trace->depth == trace_recursion_depth())
trace_recursion_clear(TRACE_GRAPH_BIT);
}
static inline int ftrace_graph_notrace_addr(unsigned long addr)
{
int ret = 0;
struct ftrace_hash *notrace_hash;
preempt_disable_notrace();
notrace_hash = rcu_dereference_protected(ftrace_graph_notrace_hash,
!preemptible());
if (ftrace_lookup_ip(notrace_hash, addr))
ret = 1;
preempt_enable_notrace();
return ret;
}
#else
static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
{
return 1;
}
static inline int ftrace_graph_notrace_addr(unsigned long addr)
{
return 0;
}
static inline void ftrace_graph_addr_finish(struct ftrace_graph_ret *trace)
{ }
#endif /* CONFIG_DYNAMIC_FTRACE */
extern unsigned int fgraph_max_depth;
static inline bool ftrace_graph_ignore_func(struct ftrace_graph_ent *trace)
{
return !(trace_recursion_test(TRACE_GRAPH_BIT) ||
ftrace_graph_addr(trace)) ||
(trace->depth < 0) ||
(fgraph_max_depth && trace->depth >= fgraph_max_depth);
}
#else /* CONFIG_FUNCTION_GRAPH_TRACER */
static inline enum print_line_t
print_graph_function_flags(struct trace_iterator *iter, u32 flags)
{
return TRACE_TYPE_UNHANDLED;
}
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
extern struct list_head ftrace_pids;
#ifdef CONFIG_FUNCTION_TRACER
#define FTRACE_PID_IGNORE -1
#define FTRACE_PID_TRACE -2
struct ftrace_func_command {
struct list_head list;
char *name;
int (*func)(struct trace_array *tr,
struct ftrace_hash *hash,
char *func, char *cmd,
char *params, int enable);
};
extern bool ftrace_filter_param __initdata;
static inline int ftrace_trace_task(struct trace_array *tr)
{
return this_cpu_read(tr->array_buffer.data->ftrace_ignore_pid) !=
FTRACE_PID_IGNORE;
}
extern int ftrace_is_dead(void);
int ftrace_create_function_files(struct trace_array *tr,
struct dentry *parent);
void ftrace_destroy_function_files(struct trace_array *tr);
int ftrace_allocate_ftrace_ops(struct trace_array *tr);
void ftrace_free_ftrace_ops(struct trace_array *tr);
void ftrace_init_global_array_ops(struct trace_array *tr);
void ftrace_init_array_ops(struct trace_array *tr, ftrace_func_t func);
void ftrace_reset_array_ops(struct trace_array *tr);
void ftrace_init_tracefs(struct trace_array *tr, struct dentry *d_tracer);
void ftrace_init_tracefs_toplevel(struct trace_array *tr,
struct dentry *d_tracer);
void ftrace_clear_pids(struct trace_array *tr);
int init_function_trace(void);
void ftrace_pid_follow_fork(struct trace_array *tr, bool enable);
#else
static inline int ftrace_trace_task(struct trace_array *tr)
{
return 1;
}
static inline int ftrace_is_dead(void) { return 0; }
static inline int
ftrace_create_function_files(struct trace_array *tr,
struct dentry *parent)
{
return 0;
}
static inline int ftrace_allocate_ftrace_ops(struct trace_array *tr)
{
return 0;
}
static inline void ftrace_free_ftrace_ops(struct trace_array *tr) { }
static inline void ftrace_destroy_function_files(struct trace_array *tr) { }
static inline __init void
ftrace_init_global_array_ops(struct trace_array *tr) { }
static inline void ftrace_reset_array_ops(struct trace_array *tr) { }
static inline void ftrace_init_tracefs(struct trace_array *tr, struct dentry *d) { }
static inline void ftrace_init_tracefs_toplevel(struct trace_array *tr, struct dentry *d) { }
static inline void ftrace_clear_pids(struct trace_array *tr) { }
static inline int init_function_trace(void) { return 0; }
static inline void ftrace_pid_follow_fork(struct trace_array *tr, bool enable) { }
#define ftrace_init_array_ops(tr, func) do { } while (0)
#endif /* CONFIG_FUNCTION_TRACER */
#if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE)
struct ftrace_probe_ops {
void (*func)(unsigned long ip,
unsigned long parent_ip,
struct trace_array *tr,
struct ftrace_probe_ops *ops,
void *data);
int (*init)(struct ftrace_probe_ops *ops,
struct trace_array *tr,
unsigned long ip, void *init_data,
void **data);
void (*free)(struct ftrace_probe_ops *ops,
struct trace_array *tr,
unsigned long ip, void *data);
int (*print)(struct seq_file *m,
unsigned long ip,
struct ftrace_probe_ops *ops,
void *data);
};
struct ftrace_func_mapper;
typedef int (*ftrace_mapper_func)(void *data);
struct ftrace_func_mapper *allocate_ftrace_func_mapper(void);
void **ftrace_func_mapper_find_ip(struct ftrace_func_mapper *mapper,
unsigned long ip);
int ftrace_func_mapper_add_ip(struct ftrace_func_mapper *mapper,
unsigned long ip, void *data);
void *ftrace_func_mapper_remove_ip(struct ftrace_func_mapper *mapper,
unsigned long ip);
void free_ftrace_func_mapper(struct ftrace_func_mapper *mapper,
ftrace_mapper_func free_func);
extern int
register_ftrace_function_probe(char *glob, struct trace_array *tr,
struct ftrace_probe_ops *ops, void *data);
extern int
unregister_ftrace_function_probe_func(char *glob, struct trace_array *tr,
struct ftrace_probe_ops *ops);
extern void clear_ftrace_function_probes(struct trace_array *tr);
int register_ftrace_command(struct ftrace_func_command *cmd);
int unregister_ftrace_command(struct ftrace_func_command *cmd);
void ftrace_create_filter_files(struct ftrace_ops *ops,
struct dentry *parent);
void ftrace_destroy_filter_files(struct ftrace_ops *ops);
extern int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
int len, int reset);
extern int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
int len, int reset);
#else
struct ftrace_func_command;
static inline __init int register_ftrace_command(struct ftrace_func_command *cmd)
{
return -EINVAL;
}
static inline __init int unregister_ftrace_command(char *cmd_name)
{
return -EINVAL;
}
static inline void clear_ftrace_function_probes(struct trace_array *tr)
{
}
#define ftrace_create_filter_files(ops, parent) do { } while (0)
#define ftrace_destroy_filter_files(ops) do { } while (0)
#endif /* CONFIG_FUNCTION_TRACER && CONFIG_DYNAMIC_FTRACE */
bool ftrace_event_is_function(struct trace_event_call *call);
struct trace_parser {
bool cont;
char *buffer;
unsigned idx;
unsigned size;
};
static inline bool trace_parser_loaded(struct trace_parser *parser)
{
return (parser->idx != 0);
}
static inline bool trace_parser_cont(struct trace_parser *parser)
{
return parser->cont;
}
static inline void trace_parser_clear(struct trace_parser *parser)
{
parser->cont = false;
parser->idx = 0;
}
extern int trace_parser_get_init(struct trace_parser *parser, int size);
extern void trace_parser_put(struct trace_parser *parser);
extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
size_t cnt, loff_t *ppos);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
# define FGRAPH_FLAGS \
C(DISPLAY_GRAPH, "display-graph"),
#else
# define FGRAPH_FLAGS
#endif
#ifdef CONFIG_BRANCH_TRACER
# define BRANCH_FLAGS \
C(BRANCH, "branch"),
#else
# define BRANCH_FLAGS
#endif
#ifdef CONFIG_FUNCTION_TRACER
# define FUNCTION_FLAGS \
C(FUNCTION, "function-trace"), \
C(FUNC_FORK, "function-fork"),
# define FUNCTION_DEFAULT_FLAGS TRACE_ITER_FUNCTION
#else
# define FUNCTION_FLAGS
# define FUNCTION_DEFAULT_FLAGS 0UL
# define TRACE_ITER_FUNC_FORK 0UL
#endif
#ifdef CONFIG_STACKTRACE
# define STACK_FLAGS \
C(STACKTRACE, "stacktrace"),
#else
# define STACK_FLAGS
#endif
#define TRACE_FLAGS \
C(PRINT_PARENT, "print-parent"), \
C(SYM_OFFSET, "sym-offset"), \
C(SYM_ADDR, "sym-addr"), \
C(VERBOSE, "verbose"), \
C(RAW, "raw"), \
C(HEX, "hex"), \
C(BIN, "bin"), \
C(BLOCK, "block"), \
C(FIELDS, "fields"), \
C(PRINTK, "trace_printk"), \
C(ANNOTATE, "annotate"), \
C(USERSTACKTRACE, "userstacktrace"), \
C(SYM_USEROBJ, "sym-userobj"), \
C(PRINTK_MSGONLY, "printk-msg-only"), \
C(CONTEXT_INFO, "context-info"), /* Print pid/cpu/time */ \
C(LATENCY_FMT, "latency-format"), \
C(RECORD_CMD, "record-cmd"), \
C(RECORD_TGID, "record-tgid"), \
C(OVERWRITE, "overwrite"), \
C(STOP_ON_FREE, "disable_on_free"), \
C(IRQ_INFO, "irq-info"), \
C(MARKERS, "markers"), \
C(EVENT_FORK, "event-fork"), \
C(PAUSE_ON_TRACE, "pause-on-trace"), \
C(HASH_PTR, "hash-ptr"), /* Print hashed pointer */ \
FUNCTION_FLAGS \
FGRAPH_FLAGS \
STACK_FLAGS \
BRANCH_FLAGS
#undef C
#define C(a, b) TRACE_ITER_##a##_BIT
enum trace_iterator_bits {
TRACE_FLAGS
TRACE_ITER_LAST_BIT
};
#undef C
#define C(a, b) TRACE_ITER_##a = (1 << TRACE_ITER_##a##_BIT)
enum trace_iterator_flags { TRACE_FLAGS };
#define TRACE_ITER_SYM_MASK \
(TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
extern struct tracer nop_trace;
#ifdef CONFIG_BRANCH_TRACER
extern int enable_branch_tracing(struct trace_array *tr);
extern void disable_branch_tracing(void);
static inline int trace_branch_enable(struct trace_array *tr)
{
if (tr->trace_flags & TRACE_ITER_BRANCH)
return enable_branch_tracing(tr);
return 0;
}
static inline void trace_branch_disable(void)
{
disable_branch_tracing();
}
#else
static inline int trace_branch_enable(struct trace_array *tr)
{
return 0;
}
static inline void trace_branch_disable(void)
{
}
#endif /* CONFIG_BRANCH_TRACER */
int tracing_update_buffers(void);
union trace_synth_field {
u8 as_u8;
u16 as_u16;
u32 as_u32;
u64 as_u64;
struct trace_dynamic_info as_dynamic;
};
struct ftrace_event_field {
struct list_head link;
const char *name;
const char *type;
int filter_type;
int offset;
int size;
int is_signed;
int len;
};
struct prog_entry;
struct event_filter {
struct prog_entry __rcu *prog;
char *filter_string;
};
struct event_subsystem {
struct list_head list;
const char *name;
struct event_filter *filter;
int ref_count;
};
struct trace_subsystem_dir {
struct list_head list;
struct event_subsystem *subsystem;
struct trace_array *tr;
struct eventfs_file *ef;
int ref_count;
int nr_events;
};
extern int call_filter_check_discard(struct trace_event_call *call, void *rec,
struct trace_buffer *buffer,
struct ring_buffer_event *event);
void trace_buffer_unlock_commit_regs(struct trace_array *tr,
struct trace_buffer *buffer,
struct ring_buffer_event *event,
unsigned int trcace_ctx,
struct pt_regs *regs);
static inline void trace_buffer_unlock_commit(struct trace_array *tr,
struct trace_buffer *buffer,
struct ring_buffer_event *event,
unsigned int trace_ctx)
{
trace_buffer_unlock_commit_regs(tr, buffer, event, trace_ctx, NULL);
}
DECLARE_PER_CPU(struct ring_buffer_event *, trace_buffered_event);
DECLARE_PER_CPU(int, trace_buffered_event_cnt);
void trace_buffered_event_disable(void);
void trace_buffered_event_enable(void);
void early_enable_events(struct trace_array *tr, char *buf, bool disable_first);
static inline void
__trace_event_discard_commit(struct trace_buffer *buffer,
struct ring_buffer_event *event)
{
if (this_cpu_read(trace_buffered_event) == event) {
this_cpu_dec(trace_buffered_event_cnt);
preempt_enable_notrace();
return;
}
ring_buffer_discard_commit(buffer, event);
}
static inline bool
__event_trigger_test_discard(struct trace_event_file *file,
struct trace_buffer *buffer,
struct ring_buffer_event *event,
void *entry,
enum event_trigger_type *tt)
{
unsigned long eflags = file->flags;
if (eflags & EVENT_FILE_FL_TRIGGER_COND)
*tt = event_triggers_call(file, buffer, entry, event);
if (likely(!(file->flags & (EVENT_FILE_FL_SOFT_DISABLED |
EVENT_FILE_FL_FILTERED |
EVENT_FILE_FL_PID_FILTER))))
return false;
if (file->flags & EVENT_FILE_FL_SOFT_DISABLED)
goto discard;
if (file->flags & EVENT_FILE_FL_FILTERED &&
!filter_match_preds(file->filter, entry))
goto discard;
if ((file->flags & EVENT_FILE_FL_PID_FILTER) &&
trace_event_ignore_this_pid(file))
goto discard;
return false;
discard:
__trace_event_discard_commit(buffer, event);
return true;
}
static inline void
event_trigger_unlock_commit(struct trace_event_file *file,
struct trace_buffer *buffer,
struct ring_buffer_event *event,
void *entry, unsigned int trace_ctx)
{
enum event_trigger_type tt = ETT_NONE;
if (!__event_trigger_test_discard(file, buffer, event, entry, &tt))
trace_buffer_unlock_commit(file->tr, buffer, event, trace_ctx);
if (tt)
event_triggers_post_call(file, tt);
}
#define FILTER_PRED_INVALID ((unsigned short)-1)
#define FILTER_PRED_IS_RIGHT (1 << 15)
#define FILTER_PRED_FOLD (1 << 15)
#define MAX_FILTER_PRED 16384
struct filter_pred;
struct regex;
typedef int (*regex_match_func)(char *str, struct regex *r, int len);
enum regex_type {
MATCH_FULL = 0,
MATCH_FRONT_ONLY,
MATCH_MIDDLE_ONLY,
MATCH_END_ONLY,
MATCH_GLOB,
MATCH_INDEX,
};
struct regex {
char pattern[MAX_FILTER_STR_VAL];
int len;
int field_len;
regex_match_func match;
};
static inline bool is_string_field(struct ftrace_event_field *field)
{
return field->filter_type == FILTER_DYN_STRING ||
field->filter_type == FILTER_RDYN_STRING ||
field->filter_type == FILTER_STATIC_STRING ||
field->filter_type == FILTER_PTR_STRING ||
field->filter_type == FILTER_COMM;
}
static inline bool is_function_field(struct ftrace_event_field *field)
{
return field->filter_type == FILTER_TRACE_FN;
}
extern enum regex_type
filter_parse_regex(char *buff, int len, char **search, int *not);
extern void print_event_filter(struct trace_event_file *file,
struct trace_seq *s);
extern int apply_event_filter(struct trace_event_file *file,
char *filter_string);
extern int apply_subsystem_event_filter(struct trace_subsystem_dir *dir,
char *filter_string);
extern void print_subsystem_event_filter(struct event_subsystem *system,
struct trace_seq *s);
extern int filter_assign_type(const char *type);
extern int create_event_filter(struct trace_array *tr,
struct trace_event_call *call,
char *filter_str, bool set_str,
struct event_filter **filterp);
extern void free_event_filter(struct event_filter *filter);
struct ftrace_event_field *
trace_find_event_field(struct trace_event_call *call, char *name);
extern void trace_event_enable_cmd_record(bool enable);
extern void trace_event_enable_tgid_record(bool enable);
extern int event_trace_init(void);
extern int init_events(void);
extern int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr);
extern int event_trace_del_tracer(struct trace_array *tr);
extern void __trace_early_add_events(struct trace_array *tr);
extern struct trace_event_file *__find_event_file(struct trace_array *tr,
const char *system,
const char *event);
extern struct trace_event_file *find_event_file(struct trace_array *tr,
const char *system,
const char *event);
static inline void *event_file_data(struct file *filp)
{
return READ_ONCE(file_inode(filp)->i_private);
}
extern struct mutex event_mutex;
extern struct list_head ftrace_events;
extern const struct file_operations event_trigger_fops;
extern const struct file_operations event_hist_fops;
extern const struct file_operations event_hist_debug_fops;
extern const struct file_operations event_inject_fops;
#ifdef CONFIG_HIST_TRIGGERS
extern int register_trigger_hist_cmd(void);
extern int register_trigger_hist_enable_disable_cmds(void);
#else
static inline int register_trigger_hist_cmd(void) { return 0; }
static inline int register_trigger_hist_enable_disable_cmds(void) { return 0; }
#endif
extern int register_trigger_cmds(void);
extern void clear_event_triggers(struct trace_array *tr);
enum {
EVENT_TRIGGER_FL_PROBE = BIT(0),
};
struct event_trigger_data {
unsigned long count;
int ref;
int flags;
struct event_trigger_ops *ops;
struct event_command *cmd_ops;
struct event_filter __rcu *filter;
char *filter_str;
void *private_data;
bool paused;
bool paused_tmp;
struct list_head list;
char *name;
struct list_head named_list;
struct event_trigger_data *named_data;
};
#define ENABLE_EVENT_STR "enable_event"
#define DISABLE_EVENT_STR "disable_event"
#define ENABLE_HIST_STR "enable_hist"
#define DISABLE_HIST_STR "disable_hist"
struct enable_trigger_data {
struct trace_event_file *file;
bool enable;
bool hist;
};
extern int event_enable_trigger_print(struct seq_file *m,
struct event_trigger_data *data);
extern void event_enable_trigger_free(struct event_trigger_data *data);
extern int event_enable_trigger_parse(struct event_command *cmd_ops,
struct trace_event_file *file,
char *glob, char *cmd,
char *param_and_filter);
extern int event_enable_register_trigger(char *glob,
struct event_trigger_data *data,
struct trace_event_file *file);
extern void event_enable_unregister_trigger(char *glob,
struct event_trigger_data *test,
struct trace_event_file *file);
extern void trigger_data_free(struct event_trigger_data *data);
extern int event_trigger_init(struct event_trigger_data *data);
extern int trace_event_trigger_enable_disable(struct trace_event_file *file,
int trigger_enable);
extern void update_cond_flag(struct trace_event_file *file);
extern int set_trigger_filter(char *filter_str,
struct event_trigger_data *trigger_data,
struct trace_event_file *file);
extern struct event_trigger_data *find_named_trigger(const char *name);
extern bool is_named_trigger(struct event_trigger_data *test);
extern int save_named_trigger(const char *name,
struct event_trigger_data *data);
extern void del_named_trigger(struct event_trigger_data *data);
extern void pause_named_trigger(struct event_trigger_data *data);
extern void unpause_named_trigger(struct event_trigger_data *data);
extern void set_named_trigger_data(struct event_trigger_data *data,
struct event_trigger_data *named_data);
extern struct event_trigger_data *
get_named_trigger_data(struct event_trigger_data *data);
extern int register_event_command(struct event_command *cmd);
extern int unregister_event_command(struct event_command *cmd);
extern int register_trigger_hist_enable_disable_cmds(void);
extern bool event_trigger_check_remove(const char *glob);
extern bool event_trigger_empty_param(const char *param);
extern int event_trigger_separate_filter(char *param_and_filter, char **param,
char **filter, bool param_required);
extern struct event_trigger_data *
event_trigger_alloc(struct event_command *cmd_ops,
char *cmd,
char *param,
void *private_data);
extern int event_trigger_parse_num(char *trigger,
struct event_trigger_data *trigger_data);
extern int event_trigger_set_filter(struct event_command *cmd_ops,
struct trace_event_file *file,
char *param,
struct event_trigger_data *trigger_data);
extern void event_trigger_reset_filter(struct event_command *cmd_ops,
struct event_trigger_data *trigger_data);
extern int event_trigger_register(struct event_command *cmd_ops,
struct trace_event_file *file,
char *glob,
struct event_trigger_data *trigger_data);
extern void event_trigger_unregister(struct event_command *cmd_ops,
struct trace_event_file *file,
char *glob,
struct event_trigger_data *trigger_data);
extern void event_file_get(struct trace_event_file *file);
extern void event_file_put(struct trace_event_file *file);
struct event_trigger_ops {
void (*trigger)(struct event_trigger_data *data,
struct trace_buffer *buffer,
void *rec,
struct ring_buffer_event *rbe);
int (*init)(struct event_trigger_data *data);
void (*free)(struct event_trigger_data *data);
int (*print)(struct seq_file *m,
struct event_trigger_data *data);
};
struct event_command {
struct list_head list;
char *name;
enum event_trigger_type trigger_type;
int flags;
int (*parse)(struct event_command *cmd_ops,
struct trace_event_file *file,
char *glob, char *cmd,
char *param_and_filter);
int (*reg)(char *glob,
struct event_trigger_data *data,
struct trace_event_file *file);
void (*unreg)(char *glob,
struct event_trigger_data *data,
struct trace_event_file *file);
void (*unreg_all)(struct trace_event_file *file);
int (*set_filter)(char *filter_str,
struct event_trigger_data *data,
struct trace_event_file *file);
struct event_trigger_ops *(*get_trigger_ops)(char *cmd, char *param);
};
enum event_command_flags {
EVENT_CMD_FL_POST_TRIGGER = 1,
EVENT_CMD_FL_NEEDS_REC = 2,
};
static inline bool event_command_post_trigger(struct event_command *cmd_ops)
{
return cmd_ops->flags & EVENT_CMD_FL_POST_TRIGGER;
}
static inline bool event_command_needs_rec(struct event_command *cmd_ops)
{
return cmd_ops->flags & EVENT_CMD_FL_NEEDS_REC;
}
extern int trace_event_enable_disable(struct trace_event_file *file,
int enable, int soft_disable);
extern int tracing_alloc_snapshot(void);
extern void tracing_snapshot_cond(struct trace_array *tr, void *cond_data);
extern int tracing_snapshot_cond_enable(struct trace_array *tr, void *cond_data, cond_update_fn_t update);
extern int tracing_snapshot_cond_disable(struct trace_array *tr);
extern void *tracing_cond_snapshot_data(struct trace_array *tr);
extern const char *__start___trace_bprintk_fmt[];
extern const char *__stop___trace_bprintk_fmt[];
extern const char *__start___tracepoint_str[];
extern const char *__stop___tracepoint_str[];
void trace_printk_control(bool enabled);
void trace_printk_start_comm(void);
int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set);
int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled);
extern int trace_set_options(struct trace_array *tr, char *option);
extern int tracing_set_tracer(struct trace_array *tr, const char *buf);
extern ssize_t tracing_resize_ring_buffer(struct trace_array *tr,
unsigned long size, int cpu_id);
extern int tracing_set_cpumask(struct trace_array *tr,
cpumask_var_t tracing_cpumask_new);
#define MAX_EVENT_NAME_LEN 64
extern ssize_t trace_parse_run_command(struct file *file,
const char __user *buffer, size_t count, loff_t *ppos,
int (*createfn)(const char *));
extern unsigned int err_pos(char *cmd, const char *str);
extern void tracing_log_err(struct trace_array *tr,
const char *loc, const char *cmd,
const char **errs, u8 type, u16 pos);
#define internal_trace_puts(str) __trace_puts(_THIS_IP_, str, strlen(str))
#undef FTRACE_ENTRY
#define FTRACE_ENTRY(call, struct_name, id, tstruct, print) \
extern struct trace_event_call \
__aligned(4) event_##call;
#undef FTRACE_ENTRY_DUP
#define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print) \
FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print))
#undef FTRACE_ENTRY_PACKED
#define FTRACE_ENTRY_PACKED(call, struct_name, id, tstruct, print) \
FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print))
#include "trace_entries.h"
#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER)
int perf_ftrace_event_register(struct trace_event_call *call,
enum trace_reg type, void *data);
#else
#define perf_ftrace_event_register NULL
#endif
#ifdef CONFIG_FTRACE_SYSCALLS
void init_ftrace_syscalls(void);
const char *get_syscall_name(int syscall);
#else
static inline void init_ftrace_syscalls(void) { }
static inline const char *get_syscall_name(int syscall)
{
return NULL;
}
#endif
#ifdef CONFIG_EVENT_TRACING
void trace_event_init(void);
void trace_event_eval_update(struct trace_eval_map **map, int len);
extern int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set);
extern int trigger_process_regex(struct trace_event_file *file, char *buff);
#else
static inline void __init trace_event_init(void) { }
static inline void trace_event_eval_update(struct trace_eval_map **map, int len) { }
#endif
#ifdef CONFIG_TRACER_SNAPSHOT
void tracing_snapshot_instance(struct trace_array *tr);
int tracing_alloc_snapshot_instance(struct trace_array *tr);
#else
static inline void tracing_snapshot_instance(struct trace_array *tr) { }
static inline int tracing_alloc_snapshot_instance(struct trace_array *tr)
{
return 0;
}
#endif
#ifdef CONFIG_PREEMPT_TRACER
void tracer_preempt_on(unsigned long a0, unsigned long a1);
void tracer_preempt_off(unsigned long a0, unsigned long a1);
#else
static inline void tracer_preempt_on(unsigned long a0, unsigned long a1) { }
static inline void tracer_preempt_off(unsigned long a0, unsigned long a1) { }
#endif
#ifdef CONFIG_IRQSOFF_TRACER
void tracer_hardirqs_on(unsigned long a0, unsigned long a1);
void tracer_hardirqs_off(unsigned long a0, unsigned long a1);
#else
static inline void tracer_hardirqs_on(unsigned long a0, unsigned long a1) { }
static inline void tracer_hardirqs_off(unsigned long a0, unsigned long a1) { }
#endif
static __always_inline void trace_iterator_reset(struct trace_iterator *iter)
{
memset_startat(iter, 0, seq);
iter->pos = -1;
}
static inline bool __is_good_name(const char *name, bool hash_ok)
{
if (!isalpha(*name) && *name != '_' && (!hash_ok || *name != '-'))
return false;
while (*++name != '\0') {
if (!isalpha(*name) && !isdigit(*name) && *name != '_' &&
(!hash_ok || *name != '-'))
return false;
}
return true;
}
static inline bool is_good_name(const char *name)
{
return __is_good_name(name, false);
}
static inline bool is_good_system_name(const char *name)
{
return __is_good_name(name, true);
}
static inline void sanitize_event_name(char *name)
{
while (*name++ != '\0')
if (*name == ':' || *name == '.')
*name = '_';
}
struct trace_min_max_param {
struct mutex *lock;
u64 *val;
u64 *min;
u64 *max;
};
#define U64_STR_SIZE 24 /* 20 digits max */
extern const struct file_operations trace_min_max_fops;
#ifdef CONFIG_RV
extern int rv_init_interface(void);
#else
static inline int rv_init_interface(void)
{
return 0;
}
#endif
#endif /* _LINUX_KERNEL_TRACE_H */