include/linux/trace

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
event
event
name
trace_trigger_soft_disabled
trace_call_bpf
perf_event_attach_bpf_prog
perf_event_detach_bpf_prog
perf_event_query_prog_array
bpf_probe_register
bpf_probe_unregister
bpf_get_raw_tracepoint
bpf_put_raw_tracepoint
bpf_get_perf_event_info
perf_trace_buf_submit
   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 
   3 #ifndef _LINUX_TRACE_EVENT_H
   4 #define _LINUX_TRACE_EVENT_H
   5 
   6 #include <linux/ring_buffer.h>
   7 #include <linux/trace_seq.h>
   8 #include <linux/percpu.h>
   9 #include <linux/hardirq.h>
  10 #include <linux/perf_event.h>
  11 #include <linux/tracepoint.h>
  12 
  13 struct trace_array;
  14 struct trace_buffer;
  15 struct tracer;
  16 struct dentry;
  17 struct bpf_prog;
  18 
  19 const char *trace_print_flags_seq(struct trace_seq *p, const char *delim,
  20                                   unsigned long flags,
  21                                   const struct trace_print_flags *flag_array);
  22 
  23 const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
  24                                     const struct trace_print_flags *symbol_array);
  25 
  26 #if BITS_PER_LONG == 32
  27 const char *trace_print_flags_seq_u64(struct trace_seq *p, const char *delim,
  28                       unsigned long long flags,
  29                       const struct trace_print_flags_u64 *flag_array);
  30 
  31 const char *trace_print_symbols_seq_u64(struct trace_seq *p,
  32                                         unsigned long long val,
  33                                         const struct trace_print_flags_u64
  34                                                                  *symbol_array);
  35 #endif
  36 
  37 const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
  38                                     unsigned int bitmask_size);
  39 
  40 const char *trace_print_hex_seq(struct trace_seq *p,
  41                                 const unsigned char *buf, int len,
  42                                 bool concatenate);
  43 
  44 const char *trace_print_array_seq(struct trace_seq *p,
  45                                    const void *buf, int count,
  46                                    size_t el_size);
  47 
  48 struct trace_iterator;
  49 struct trace_event;
  50 
  51 int trace_raw_output_prep(struct trace_iterator *iter,
  52                           struct trace_event *event);
  53 
  54 /*
  55  * The trace entry - the most basic unit of tracing. This is what
  56  * is printed in the end as a single line in the trace output, such as:
  57  *
  58  *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
  59  */
  60 struct trace_entry {
  61         unsigned short          type;
  62         unsigned char           flags;
  63         unsigned char           preempt_count;
  64         int                     pid;
  65 };
  66 
  67 #define TRACE_EVENT_TYPE_MAX                                            \
  68         ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
  69 
  70 /*
  71  * Trace iterator - used by printout routines who present trace
  72  * results to users and which routines might sleep, etc:
  73  */
  74 struct trace_iterator {
  75         struct trace_array      *tr;
  76         struct tracer           *trace;
  77         struct trace_buffer     *trace_buffer;
  78         void                    *private;
  79         int                     cpu_file;
  80         struct mutex            mutex;
  81         struct ring_buffer_iter **buffer_iter;
  82         unsigned long           iter_flags;
  83 
  84         /* trace_seq for __print_flags() and __print_symbolic() etc. */
  85         struct trace_seq        tmp_seq;
  86 
  87         cpumask_var_t           started;
  88 
  89         /* it's true when current open file is snapshot */
  90         bool                    snapshot;
  91 
  92         /* The below is zeroed out in pipe_read */
  93         struct trace_seq        seq;
  94         struct trace_entry      *ent;
  95         unsigned long           lost_events;
  96         int                     leftover;
  97         int                     ent_size;
  98         int                     cpu;
  99         u64                     ts;
 100 
 101         loff_t                  pos;
 102         long                    idx;
 103 
 104         /* All new field here will be zeroed out in pipe_read */
 105 };
 106 
 107 enum trace_iter_flags {
 108         TRACE_FILE_LAT_FMT      = 1,
 109         TRACE_FILE_ANNOTATE     = 2,
 110         TRACE_FILE_TIME_IN_NS   = 4,
 111 };
 112 
 113 
 114 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
 115                                       int flags, struct trace_event *event);
 116 
 117 struct trace_event_functions {
 118         trace_print_func        trace;
 119         trace_print_func        raw;
 120         trace_print_func        hex;
 121         trace_print_func        binary;
 122 };
 123 
 124 struct trace_event {
 125         struct hlist_node               node;
 126         struct list_head                list;
 127         int                             type;
 128         struct trace_event_functions    *funcs;
 129 };
 130 
 131 extern int register_trace_event(struct trace_event *event);
 132 extern int unregister_trace_event(struct trace_event *event);
 133 
 134 /* Return values for print_line callback */
 135 enum print_line_t {
 136         TRACE_TYPE_PARTIAL_LINE = 0,    /* Retry after flushing the seq */
 137         TRACE_TYPE_HANDLED      = 1,
 138         TRACE_TYPE_UNHANDLED    = 2,    /* Relay to other output functions */
 139         TRACE_TYPE_NO_CONSUME   = 3     /* Handled but ask to not consume */
 140 };
 141 
 142 enum print_line_t trace_handle_return(struct trace_seq *s);
 143 
 144 void tracing_generic_entry_update(struct trace_entry *entry,
 145                                   unsigned short type,
 146                                   unsigned long flags,
 147                                   int pc);
 148 struct trace_event_file;
 149 
 150 struct ring_buffer_event *
 151 trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer,
 152                                 struct trace_event_file *trace_file,
 153                                 int type, unsigned long len,
 154                                 unsigned long flags, int pc);
 155 
 156 #define TRACE_RECORD_CMDLINE    BIT(0)
 157 #define TRACE_RECORD_TGID       BIT(1)
 158 
 159 void tracing_record_taskinfo(struct task_struct *task, int flags);
 160 void tracing_record_taskinfo_sched_switch(struct task_struct *prev,
 161                                           struct task_struct *next, int flags);
 162 
 163 void tracing_record_cmdline(struct task_struct *task);
 164 void tracing_record_tgid(struct task_struct *task);
 165 
 166 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...);
 167 
 168 struct event_filter;
 169 
 170 enum trace_reg {
 171         TRACE_REG_REGISTER,
 172         TRACE_REG_UNREGISTER,
 173 #ifdef CONFIG_PERF_EVENTS
 174         TRACE_REG_PERF_REGISTER,
 175         TRACE_REG_PERF_UNREGISTER,
 176         TRACE_REG_PERF_OPEN,
 177         TRACE_REG_PERF_CLOSE,
 178         /*
 179          * These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a
 180          * custom action was taken and the default action is not to be
 181          * performed.
 182          */
 183         TRACE_REG_PERF_ADD,
 184         TRACE_REG_PERF_DEL,
 185 #endif
 186 };
 187 
 188 struct trace_event_call;
 189 
 190 struct trace_event_class {
 191         const char              *system;
 192         void                    *probe;
 193 #ifdef CONFIG_PERF_EVENTS
 194         void                    *perf_probe;
 195 #endif
 196         int                     (*reg)(struct trace_event_call *event,
 197                                        enum trace_reg type, void *data);
 198         int                     (*define_fields)(struct trace_event_call *);
 199         struct list_head        *(*get_fields)(struct trace_event_call *);
 200         struct list_head        fields;
 201         int                     (*raw_init)(struct trace_event_call *);
 202 };
 203 
 204 extern int trace_event_reg(struct trace_event_call *event,
 205                             enum trace_reg type, void *data);
 206 
 207 struct trace_event_buffer {
 208         struct ring_buffer              *buffer;
 209         struct ring_buffer_event        *event;
 210         struct trace_event_file         *trace_file;
 211         void                            *entry;
 212         unsigned long                   flags;
 213         int                             pc;
 214 };
 215 
 216 void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer,
 217                                   struct trace_event_file *trace_file,
 218                                   unsigned long len);
 219 
 220 void trace_event_buffer_commit(struct trace_event_buffer *fbuffer);
 221 
 222 enum {
 223         TRACE_EVENT_FL_FILTERED_BIT,
 224         TRACE_EVENT_FL_CAP_ANY_BIT,
 225         TRACE_EVENT_FL_NO_SET_FILTER_BIT,
 226         TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
 227         TRACE_EVENT_FL_TRACEPOINT_BIT,
 228         TRACE_EVENT_FL_KPROBE_BIT,
 229         TRACE_EVENT_FL_UPROBE_BIT,
 230 };
 231 
 232 /*
 233  * Event flags:
 234  *  FILTERED      - The event has a filter attached
 235  *  CAP_ANY       - Any user can enable for perf
 236  *  NO_SET_FILTER - Set when filter has error and is to be ignored
 237  *  IGNORE_ENABLE - For trace internal events, do not enable with debugfs file
 238  *  TRACEPOINT    - Event is a tracepoint
 239  *  KPROBE        - Event is a kprobe
 240  *  UPROBE        - Event is a uprobe
 241  */
 242 enum {
 243         TRACE_EVENT_FL_FILTERED         = (1 << TRACE_EVENT_FL_FILTERED_BIT),
 244         TRACE_EVENT_FL_CAP_ANY          = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
 245         TRACE_EVENT_FL_NO_SET_FILTER    = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
 246         TRACE_EVENT_FL_IGNORE_ENABLE    = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
 247         TRACE_EVENT_FL_TRACEPOINT       = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
 248         TRACE_EVENT_FL_KPROBE           = (1 << TRACE_EVENT_FL_KPROBE_BIT),
 249         TRACE_EVENT_FL_UPROBE           = (1 << TRACE_EVENT_FL_UPROBE_BIT),
 250 };
 251 
 252 #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)
 253 
 254 struct trace_event_call {
 255         struct list_head        list;
 256         struct trace_event_class *class;
 257         union {
 258                 char                    *name;
 259                 /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */
 260                 struct tracepoint       *tp;
 261         };
 262         struct trace_event      event;
 263         char                    *print_fmt;
 264         struct event_filter     *filter;
 265         void                    *mod;
 266         void                    *data;
 267         /*
 268          *   bit 0:             filter_active
 269          *   bit 1:             allow trace by non root (cap any)
 270          *   bit 2:             failed to apply filter
 271          *   bit 3:             trace internal event (do not enable)
 272          *   bit 4:             Event was enabled by module
 273          *   bit 5:             use call filter rather than file filter
 274          *   bit 6:             Event is a tracepoint
 275          */
 276         int                     flags; /* static flags of different events */
 277 
 278 #ifdef CONFIG_PERF_EVENTS
 279         int                             perf_refcount;
 280         struct hlist_head __percpu      *perf_events;
 281         struct bpf_prog_array __rcu     *prog_array;
 282 
 283         int     (*perf_perm)(struct trace_event_call *,
 284                              struct perf_event *);
 285 #endif
 286 };
 287 
 288 #ifdef CONFIG_PERF_EVENTS
 289 static inline bool bpf_prog_array_valid(struct trace_event_call *call)
 290 {
 291         /*
 292          * This inline function checks whether call->prog_array
 293          * is valid or not. The function is called in various places,
 294          * outside rcu_read_lock/unlock, as a heuristic to speed up execution.
 295          *
 296          * If this function returns true, and later call->prog_array
 297          * becomes false inside rcu_read_lock/unlock region,
 298          * we bail out then. If this function return false,
 299          * there is a risk that we might miss a few events if the checking
 300          * were delayed until inside rcu_read_lock/unlock region and
 301          * call->prog_array happened to become non-NULL then.
 302          *
 303          * Here, READ_ONCE() is used instead of rcu_access_pointer().
 304          * rcu_access_pointer() requires the actual definition of
 305          * "struct bpf_prog_array" while READ_ONCE() only needs
 306          * a declaration of the same type.
 307          */
 308         return !!READ_ONCE(call->prog_array);
 309 }
 310 #endif
 311 
 312 static inline const char *
 313 trace_event_name(struct trace_event_call *call)
 314 {
 315         if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
 316                 return call->tp ? call->tp->name : NULL;
 317         else
 318                 return call->name;
 319 }
 320 
 321 static inline struct list_head *
 322 trace_get_fields(struct trace_event_call *event_call)
 323 {
 324         if (!event_call->class->get_fields)
 325                 return &event_call->class->fields;
 326         return event_call->class->get_fields(event_call);
 327 }
 328 
 329 struct trace_array;
 330 struct trace_subsystem_dir;
 331 
 332 enum {
 333         EVENT_FILE_FL_ENABLED_BIT,
 334         EVENT_FILE_FL_RECORDED_CMD_BIT,
 335         EVENT_FILE_FL_RECORDED_TGID_BIT,
 336         EVENT_FILE_FL_FILTERED_BIT,
 337         EVENT_FILE_FL_NO_SET_FILTER_BIT,
 338         EVENT_FILE_FL_SOFT_MODE_BIT,
 339         EVENT_FILE_FL_SOFT_DISABLED_BIT,
 340         EVENT_FILE_FL_TRIGGER_MODE_BIT,
 341         EVENT_FILE_FL_TRIGGER_COND_BIT,
 342         EVENT_FILE_FL_PID_FILTER_BIT,
 343         EVENT_FILE_FL_WAS_ENABLED_BIT,
 344 };
 345 
 346 /*
 347  * Event file flags:
 348  *  ENABLED       - The event is enabled
 349  *  RECORDED_CMD  - The comms should be recorded at sched_switch
 350  *  RECORDED_TGID - The tgids should be recorded at sched_switch
 351  *  FILTERED      - The event has a filter attached
 352  *  NO_SET_FILTER - Set when filter has error and is to be ignored
 353  *  SOFT_MODE     - The event is enabled/disabled by SOFT_DISABLED
 354  *  SOFT_DISABLED - When set, do not trace the event (even though its
 355  *                   tracepoint may be enabled)
 356  *  TRIGGER_MODE  - When set, invoke the triggers associated with the event
 357  *  TRIGGER_COND  - When set, one or more triggers has an associated filter
 358  *  PID_FILTER    - When set, the event is filtered based on pid
 359  *  WAS_ENABLED   - Set when enabled to know to clear trace on module removal
 360  */
 361 enum {
 362         EVENT_FILE_FL_ENABLED           = (1 << EVENT_FILE_FL_ENABLED_BIT),
 363         EVENT_FILE_FL_RECORDED_CMD      = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT),
 364         EVENT_FILE_FL_RECORDED_TGID     = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT),
 365         EVENT_FILE_FL_FILTERED          = (1 << EVENT_FILE_FL_FILTERED_BIT),
 366         EVENT_FILE_FL_NO_SET_FILTER     = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT),
 367         EVENT_FILE_FL_SOFT_MODE         = (1 << EVENT_FILE_FL_SOFT_MODE_BIT),
 368         EVENT_FILE_FL_SOFT_DISABLED     = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT),
 369         EVENT_FILE_FL_TRIGGER_MODE      = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT),
 370         EVENT_FILE_FL_TRIGGER_COND      = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT),
 371         EVENT_FILE_FL_PID_FILTER        = (1 << EVENT_FILE_FL_PID_FILTER_BIT),
 372         EVENT_FILE_FL_WAS_ENABLED       = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT),
 373 };
 374 
 375 struct trace_event_file {
 376         struct list_head                list;
 377         struct trace_event_call         *event_call;
 378         struct event_filter __rcu       *filter;
 379         struct dentry                   *dir;
 380         struct trace_array              *tr;
 381         struct trace_subsystem_dir      *system;
 382         struct list_head                triggers;
 383 
 384         /*
 385          * 32 bit flags:
 386          *   bit 0:             enabled
 387          *   bit 1:             enabled cmd record
 388          *   bit 2:             enable/disable with the soft disable bit
 389          *   bit 3:             soft disabled
 390          *   bit 4:             trigger enabled
 391          *
 392          * Note: The bits must be set atomically to prevent races
 393          * from other writers. Reads of flags do not need to be in
 394          * sync as they occur in critical sections. But the way flags
 395          * is currently used, these changes do not affect the code
 396          * except that when a change is made, it may have a slight
 397          * delay in propagating the changes to other CPUs due to
 398          * caching and such. Which is mostly OK ;-)
 399          */
 400         unsigned long           flags;
 401         atomic_t                sm_ref; /* soft-mode reference counter */
 402         atomic_t                tm_ref; /* trigger-mode reference counter */
 403 };
 404 
 405 #define __TRACE_EVENT_FLAGS(name, value)                                \
 406         static int __init trace_init_flags_##name(void)                 \
 407         {                                                               \
 408                 event_##name.flags |= value;                            \
 409                 return 0;                                               \
 410         }                                                               \
 411         early_initcall(trace_init_flags_##name);
 412 
 413 #define __TRACE_EVENT_PERF_PERM(name, expr...)                          \
 414         static int perf_perm_##name(struct trace_event_call *tp_event, \
 415                                     struct perf_event *p_event)         \
 416         {                                                               \
 417                 return ({ expr; });                                     \
 418         }                                                               \
 419         static int __init trace_init_perf_perm_##name(void)             \
 420         {                                                               \
 421                 event_##name.perf_perm = &perf_perm_##name;             \
 422                 return 0;                                               \
 423         }                                                               \
 424         early_initcall(trace_init_perf_perm_##name);
 425 
 426 #define PERF_MAX_TRACE_SIZE     2048
 427 
 428 #define MAX_FILTER_STR_VAL      256     /* Should handle KSYM_SYMBOL_LEN */
 429 
 430 enum event_trigger_type {
 431         ETT_NONE                = (0),
 432         ETT_TRACE_ONOFF         = (1 << 0),
 433         ETT_SNAPSHOT            = (1 << 1),
 434         ETT_STACKTRACE          = (1 << 2),
 435         ETT_EVENT_ENABLE        = (1 << 3),
 436         ETT_EVENT_HIST          = (1 << 4),
 437         ETT_HIST_ENABLE         = (1 << 5),
 438 };
 439 
 440 extern int filter_match_preds(struct event_filter *filter, void *rec);
 441 
 442 extern enum event_trigger_type
 443 event_triggers_call(struct trace_event_file *file, void *rec,
 444                     struct ring_buffer_event *event);
 445 extern void
 446 event_triggers_post_call(struct trace_event_file *file,
 447                          enum event_trigger_type tt);
 448 
 449 bool trace_event_ignore_this_pid(struct trace_event_file *trace_file);
 450 
 451 /**
 452  * trace_trigger_soft_disabled - do triggers and test if soft disabled
 453  * @file: The file pointer of the event to test
 454  *
 455  * If any triggers without filters are attached to this event, they
 456  * will be called here. If the event is soft disabled and has no
 457  * triggers that require testing the fields, it will return true,
 458  * otherwise false.
 459  */
 460 static inline bool
 461 trace_trigger_soft_disabled(struct trace_event_file *file)
 462 {
 463         unsigned long eflags = file->flags;
 464 
 465         if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
 466                 if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
 467                         event_triggers_call(file, NULL, NULL);
 468                 if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
 469                         return true;
 470                 if (eflags & EVENT_FILE_FL_PID_FILTER)
 471                         return trace_event_ignore_this_pid(file);
 472         }
 473         return false;
 474 }
 475 
 476 #ifdef CONFIG_BPF_EVENTS
 477 unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx);
 478 int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog);
 479 void perf_event_detach_bpf_prog(struct perf_event *event);
 480 int perf_event_query_prog_array(struct perf_event *event, void __user *info);
 481 int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
 482 int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
 483 struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name);
 484 void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp);
 485 int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id,
 486                             u32 *fd_type, const char **buf,
 487                             u64 *probe_offset, u64 *probe_addr);
 488 #else
 489 static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx)
 490 {
 491         return 1;
 492 }
 493 
 494 static inline int
 495 perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog)
 496 {
 497         return -EOPNOTSUPP;
 498 }
 499 
 500 static inline void perf_event_detach_bpf_prog(struct perf_event *event) { }
 501 
 502 static inline int
 503 perf_event_query_prog_array(struct perf_event *event, void __user *info)
 504 {
 505         return -EOPNOTSUPP;
 506 }
 507 static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
 508 {
 509         return -EOPNOTSUPP;
 510 }
 511 static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
 512 {
 513         return -EOPNOTSUPP;
 514 }
 515 static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name)
 516 {
 517         return NULL;
 518 }
 519 static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp)
 520 {
 521 }
 522 static inline int bpf_get_perf_event_info(const struct perf_event *event,
 523                                           u32 *prog_id, u32 *fd_type,
 524                                           const char **buf, u64 *probe_offset,
 525                                           u64 *probe_addr)
 526 {
 527         return -EOPNOTSUPP;
 528 }
 529 #endif
 530 
 531 enum {
 532         FILTER_OTHER = 0,
 533         FILTER_STATIC_STRING,
 534         FILTER_DYN_STRING,
 535         FILTER_PTR_STRING,
 536         FILTER_TRACE_FN,
 537         FILTER_COMM,
 538         FILTER_CPU,
 539 };
 540 
 541 extern int trace_event_raw_init(struct trace_event_call *call);
 542 extern int trace_define_field(struct trace_event_call *call, const char *type,
 543                               const char *name, int offset, int size,
 544                               int is_signed, int filter_type);
 545 extern int trace_add_event_call(struct trace_event_call *call);
 546 extern int trace_remove_event_call(struct trace_event_call *call);
 547 extern int trace_event_get_offsets(struct trace_event_call *call);
 548 
 549 #define is_signed_type(type)    (((type)(-1)) < (type)1)
 550 
 551 int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set);
 552 int trace_set_clr_event(const char *system, const char *event, int set);
 553 
 554 /*
 555  * The double __builtin_constant_p is because gcc will give us an error
 556  * if we try to allocate the static variable to fmt if it is not a
 557  * constant. Even with the outer if statement optimizing out.
 558  */
 559 #define event_trace_printk(ip, fmt, args...)                            \
 560 do {                                                                    \
 561         __trace_printk_check_format(fmt, ##args);                       \
 562         tracing_record_cmdline(current);                                \
 563         if (__builtin_constant_p(fmt)) {                                \
 564                 static const char *trace_printk_fmt                     \
 565                   __attribute__((section("__trace_printk_fmt"))) =      \
 566                         __builtin_constant_p(fmt) ? fmt : NULL;         \
 567                                                                         \
 568                 __trace_bprintk(ip, trace_printk_fmt, ##args);          \
 569         } else                                                          \
 570                 __trace_printk(ip, fmt, ##args);                        \
 571 } while (0)
 572 
 573 #ifdef CONFIG_PERF_EVENTS
 574 struct perf_event;
 575 
 576 DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
 577 DECLARE_PER_CPU(int, bpf_kprobe_override);
 578 
 579 extern int  perf_trace_init(struct perf_event *event);
 580 extern void perf_trace_destroy(struct perf_event *event);
 581 extern int  perf_trace_add(struct perf_event *event, int flags);
 582 extern void perf_trace_del(struct perf_event *event, int flags);
 583 #ifdef CONFIG_KPROBE_EVENTS
 584 extern int  perf_kprobe_init(struct perf_event *event, bool is_retprobe);
 585 extern void perf_kprobe_destroy(struct perf_event *event);
 586 extern int bpf_get_kprobe_info(const struct perf_event *event,
 587                                u32 *fd_type, const char **symbol,
 588                                u64 *probe_offset, u64 *probe_addr,
 589                                bool perf_type_tracepoint);
 590 #endif
 591 #ifdef CONFIG_UPROBE_EVENTS
 592 extern int  perf_uprobe_init(struct perf_event *event,
 593                              unsigned long ref_ctr_offset, bool is_retprobe);
 594 extern void perf_uprobe_destroy(struct perf_event *event);
 595 extern int bpf_get_uprobe_info(const struct perf_event *event,
 596                                u32 *fd_type, const char **filename,
 597                                u64 *probe_offset, bool perf_type_tracepoint);
 598 #endif
 599 extern int  ftrace_profile_set_filter(struct perf_event *event, int event_id,
 600                                      char *filter_str);
 601 extern void ftrace_profile_free_filter(struct perf_event *event);
 602 void perf_trace_buf_update(void *record, u16 type);
 603 void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp);
 604 
 605 void bpf_trace_run1(struct bpf_prog *prog, u64 arg1);
 606 void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2);
 607 void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2,
 608                     u64 arg3);
 609 void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2,
 610                     u64 arg3, u64 arg4);
 611 void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2,
 612                     u64 arg3, u64 arg4, u64 arg5);
 613 void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2,
 614                     u64 arg3, u64 arg4, u64 arg5, u64 arg6);
 615 void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2,
 616                     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7);
 617 void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2,
 618                     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
 619                     u64 arg8);
 620 void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2,
 621                     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
 622                     u64 arg8, u64 arg9);
 623 void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2,
 624                      u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
 625                      u64 arg8, u64 arg9, u64 arg10);
 626 void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2,
 627                      u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
 628                      u64 arg8, u64 arg9, u64 arg10, u64 arg11);
 629 void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2,
 630                      u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
 631                      u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12);
 632 void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx,
 633                                struct trace_event_call *call, u64 count,
 634                                struct pt_regs *regs, struct hlist_head *head,
 635                                struct task_struct *task);
 636 
 637 static inline void
 638 perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type,
 639                        u64 count, struct pt_regs *regs, void *head,
 640                        struct task_struct *task)
 641 {
 642         perf_tp_event(type, count, raw_data, size, regs, head, rctx, task);
 643 }
 644 
 645 #endif
 646 
 647 #endif /* _LINUX_TRACE_EVENT_H */
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root/include/linux/trace_events.h

INCLUDED FROM

DEFINITIONS
