include/lttng/abi.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * lttng/abi.h
   4  *
   5  * LTTng ABI header
   6  *
   7  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  */
   9
  10 #ifndef _LTTNG_ABI_H
  11 #define _LTTNG_ABI_H
  12
  13 #include <linux/fs.h>
  14 #include <linux/types.h>
  15
  16 /*
  17  * Major/minor version of ABI exposed to lttng tools. Major number
  18  * should be increased when an incompatible ABI change is done.
  19  */
  20 #define LTTNG_KERNEL_ABI_MAJOR_VERSION          2
  21 #define LTTNG_KERNEL_ABI_MINOR_VERSION          6
  22
  23 #define LTTNG_KERNEL_ABI_SYM_NAME_LEN           256
  24 #define LTTNG_KERNEL_ABI_SESSION_NAME_LEN       256
  25
  26 /*
  27  * The expected iso8601 time formats are either:
  28  *
  29  * - YYYYmmddTHHMMSS+HHMM           (20 characters + \0)
  30  * - YYYY-mm-ddTHH:MM:SS+HH:MM      (25 characters + \0)
  31  */
  32 #define LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN      26
  33
  34 enum lttng_kernel_abi_instrumentation {
  35         LTTNG_KERNEL_ABI_TRACEPOINT     = 0,
  36         LTTNG_KERNEL_ABI_KPROBE = 1,
  37         LTTNG_KERNEL_ABI_FUNCTION       = 2,
  38         LTTNG_KERNEL_ABI_KRETPROBE      = 3,
  39         LTTNG_KERNEL_ABI_NOOP   = 4,    /* not hooked */
  40         LTTNG_KERNEL_ABI_SYSCALL        = 5,
  41         LTTNG_KERNEL_ABI_UPROBE = 6,
  42 };
  43
  44 /*
  45  * LTTng consumer mode
  46  */
  47 enum lttng_kernel_abi_output {
  48         LTTNG_KERNEL_ABI_SPLICE = 0,
  49         LTTNG_KERNEL_ABI_MMAP   = 1,
  50 };
  51
  52 /*
  53  * LTTng DebugFS ABI structures.
  54  */
  55 #define LTTNG_KERNEL_ABI_CHANNEL_PADDING        LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32
  56 struct lttng_kernel_abi_channel {
  57         uint64_t subbuf_size;                   /* in bytes */
  58         uint64_t num_subbuf;
  59         unsigned int switch_timer_interval;     /* usecs */
  60         unsigned int read_timer_interval;       /* usecs */
  61         uint32_t output;                        /* enum lttng_kernel_abi_output (splice, mmap) */
  62         int overwrite;                          /* 1: overwrite, 0: discard */
  63         char padding[LTTNG_KERNEL_ABI_CHANNEL_PADDING];
  64 } __attribute__((packed));
  65
  66 enum lttng_kernel_abi_kretprobe_entryexit {
  67         LTTNG_KERNEL_ABI_KRETPROBE_ENTRYEXIT = 0,
  68         LTTNG_KERNEL_ABI_KRETPROBE_ENTRY = 1,
  69         LTTNG_KERNEL_ABI_KRETPROBE_EXIT = 2,
  70 };
  71
  72 struct lttng_kernel_abi_kretprobe {
  73         uint64_t addr;
  74
  75         uint64_t offset;
  76         char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
  77         uint8_t entryexit;      /* enum lttng_kernel_abi_kretprobe_entryexit */
  78 } __attribute__((packed));
  79
  80 /*
  81  * Either addr is used, or symbol_name and offset.
  82  */
  83 struct lttng_kernel_abi_kprobe {
  84         uint64_t addr;
  85
  86         uint64_t offset;
  87         char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
  88 } __attribute__((packed));
  89
  90 struct lttng_kernel_abi_function_tracer {
  91         char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
  92 } __attribute__((packed));
  93
  94 struct lttng_kernel_abi_uprobe {
  95         int fd;
  96 } __attribute__((packed));
  97
  98 struct lttng_kernel_abi_event_callsite_uprobe {
  99         uint64_t offset;
 100 } __attribute__((packed));
 101
 102 struct lttng_kernel_abi_event_callsite {
 103         union {
 104                 struct lttng_kernel_abi_event_callsite_uprobe uprobe;
 105         } u;
 106 } __attribute__((packed));
 107
 108 enum lttng_kernel_abi_syscall_entryexit {
 109         LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT      = 0,
 110         LTTNG_KERNEL_ABI_SYSCALL_ENTRY  = 1,
 111         LTTNG_KERNEL_ABI_SYSCALL_EXIT   = 2,
 112 };
 113
 114 enum lttng_kernel_abi_syscall_abi {
 115         LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL = 0,
 116         LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE = 1,
 117         LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT = 2,
 118 };
 119
 120 enum lttng_kernel_abi_syscall_match {
 121         LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME = 0,
 122         LTTNG_KERNEL_ABI_SYSCALL_MATCH_NR = 1,          /* Not implemented. */
 123 };
 124
 125 struct lttng_kernel_abi_syscall {
 126         uint8_t entryexit;      /* enum lttng_kernel_abi_syscall_entryexit */
 127         uint8_t abi;            /* enum lttng_kernel_abi_syscall_abi */
 128         uint8_t match;          /* enum lttng_kernel_abi_syscall_match */
 129         uint8_t padding;
 130         uint32_t nr;            /* For LTTNG_SYSCALL_MATCH_NR */
 131 } __attribute__((packed));
 132
 133 /*
 134  * For syscall tracing, name = "*" means "enable all".
 135  */
 136 #define LTTNG_KERNEL_ABI_EVENT_PADDING1 8
 137 #define LTTNG_KERNEL_ABI_EVENT_PADDING2 LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32
 138 struct lttng_kernel_abi_event {
 139         char name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];       /* event name */
 140         uint32_t instrumentation;               /* enum lttng_kernel_abi_instrumentation */
 141         uint64_t token;                         /* User-provided token */
 142         char padding[LTTNG_KERNEL_ABI_EVENT_PADDING1];
 143
 144         /* Per instrumentation type configuration */
 145         union {
 146                 struct lttng_kernel_abi_kretprobe kretprobe;
 147                 struct lttng_kernel_abi_kprobe kprobe;
 148                 struct lttng_kernel_abi_function_tracer ftrace;
 149                 struct lttng_kernel_abi_uprobe uprobe;
 150                 struct lttng_kernel_abi_syscall syscall;
 151                 char padding[LTTNG_KERNEL_ABI_EVENT_PADDING2];
 152         } u;
 153 } __attribute__((packed));
 154
 155 #define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_PADDING 32
 156 struct lttng_kernel_abi_event_notifier {
 157         struct lttng_kernel_abi_event event;
 158         uint64_t error_counter_index;
 159
 160         char padding[LTTNG_KERNEL_ABI_EVENT_NOTIFIER_PADDING];
 161 } __attribute__((packed));
 162
 163 #define LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX  4
 164
 165 enum lttng_kernel_abi_counter_arithmetic {
 166         LTTNG_KERNEL_ABI_COUNTER_ARITHMETIC_MODULAR = 0,
 167 };
 168
 169 enum lttng_kernel_abi_counter_bitness {
 170         LTTNG_KERNEL_ABI_COUNTER_BITNESS_32 = 0,
 171         LTTNG_KERNEL_ABI_COUNTER_BITNESS_64 = 1,
 172 };
 173
 174 struct lttng_kernel_abi_counter_dimension {
 175         uint64_t size;
 176         uint64_t underflow_index;
 177         uint64_t overflow_index;
 178         uint8_t has_underflow;
 179         uint8_t has_overflow;
 180 } __attribute__((packed));
 181
 182 #define LTTNG_KERNEL_ABI_COUNTER_CONF_PADDING1  67
 183 struct lttng_kernel_abi_counter_conf {
 184         uint32_t arithmetic;    /* enum lttng_kernel_abi_counter_arithmetic */
 185         uint32_t bitness;       /* enum lttng_kernel_abi_counter_bitness */
 186         uint32_t number_dimensions;
 187         int64_t global_sum_step;
 188         struct lttng_kernel_abi_counter_dimension dimensions[LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX];
 189         uint8_t coalesce_hits;
 190         char padding[LTTNG_KERNEL_ABI_COUNTER_CONF_PADDING1];
 191 } __attribute__((packed));
 192
 193 struct lttng_kernel_abi_counter_index {
 194         uint32_t number_dimensions;
 195         uint64_t dimension_indexes[LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX];
 196 } __attribute__((packed));
 197
 198 struct lttng_kernel_abi_counter_value {
 199         int64_t value;
 200         uint8_t underflow;
 201         uint8_t overflow;
 202 } __attribute__((packed));
 203
 204 #define LTTNG_KERNEL_ABI_COUNTER_READ_PADDING 32
 205 struct lttng_kernel_abi_counter_read {
 206         struct lttng_kernel_abi_counter_index index;
 207         int32_t cpu;    /* -1 for global counter, >= 0 for specific cpu. */
 208         struct lttng_kernel_abi_counter_value value;    /* output */
 209         char padding[LTTNG_KERNEL_ABI_COUNTER_READ_PADDING];
 210 } __attribute__((packed));
 211
 212 #define LTTNG_KERNEL_ABI_COUNTER_AGGREGATE_PADDING 32
 213 struct lttng_kernel_abi_counter_aggregate {
 214         struct lttng_kernel_abi_counter_index index;
 215         struct lttng_kernel_abi_counter_value value;    /* output */
 216         char padding[LTTNG_KERNEL_ABI_COUNTER_AGGREGATE_PADDING];
 217 } __attribute__((packed));
 218
 219 #define LTTNG_KERNEL_ABI_COUNTER_CLEAR_PADDING 32
 220 struct lttng_kernel_abi_counter_clear {
 221         struct lttng_kernel_abi_counter_index index;
 222         char padding[LTTNG_KERNEL_ABI_COUNTER_CLEAR_PADDING];
 223 } __attribute__((packed));
 224
 225 #define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
 226 struct lttng_kernel_abi_event_notifier_notification {
 227         uint64_t token;
 228         uint16_t capture_buf_size;
 229         char padding[LTTNG_KERNEL_ABI_EVENT_NOTIFIER_NOTIFICATION_PADDING];
 230 } __attribute__((packed));
 231
 232 struct lttng_kernel_abi_tracer_version {
 233         uint32_t major;
 234         uint32_t minor;
 235         uint32_t patchlevel;
 236 } __attribute__((packed));
 237
 238 struct lttng_kernel_abi_tracer_abi_version {
 239         uint32_t major;
 240         uint32_t minor;
 241 } __attribute__((packed));
 242
 243 struct lttng_kernel_abi_session_name {
 244         char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN];
 245 } __attribute__((packed));
 246
 247 struct lttng_kernel_abi_session_creation_time {
 248         char iso8601[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN];
 249 } __attribute__((packed));
 250
 251 enum lttng_kernel_abi_calibrate_type {
 252         LTTNG_KERNEL_ABI_CALIBRATE_KRETPROBE,
 253 };
 254
 255 struct lttng_kernel_abi_calibrate {
 256         uint32_t type;  /* enum lttng_kernel_abi_calibrate_type (input) */
 257 } __attribute__((packed));
 258
 259 struct lttng_kernel_abi_syscall_mask {
 260         uint32_t len;   /* in bits */
 261         char mask[];
 262 } __attribute__((packed));
 263
 264 enum lttng_kernel_abi_context_type {
 265         LTTNG_KERNEL_ABI_CONTEXT_PID            = 0,
 266         LTTNG_KERNEL_ABI_CONTEXT_PERF_COUNTER   = 1,
 267         LTTNG_KERNEL_ABI_CONTEXT_PROCNAME       = 2,
 268         LTTNG_KERNEL_ABI_CONTEXT_PRIO           = 3,
 269         LTTNG_KERNEL_ABI_CONTEXT_NICE           = 4,
 270         LTTNG_KERNEL_ABI_CONTEXT_VPID           = 5,
 271         LTTNG_KERNEL_ABI_CONTEXT_TID            = 6,
 272         LTTNG_KERNEL_ABI_CONTEXT_VTID           = 7,
 273         LTTNG_KERNEL_ABI_CONTEXT_PPID           = 8,
 274         LTTNG_KERNEL_ABI_CONTEXT_VPPID          = 9,
 275         LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME       = 10,
 276         LTTNG_KERNEL_ABI_CONTEXT_CPU_ID         = 11,
 277         LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE  = 12,
 278         LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE    = 13,
 279         LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE = 14,
 280         LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE     = 15,
 281         LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL = 16,
 282         LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER = 17,
 283         LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS      = 18,
 284         LTTNG_KERNEL_ABI_CONTEXT_IPC_NS         = 19,
 285         LTTNG_KERNEL_ABI_CONTEXT_MNT_NS         = 20,
 286         LTTNG_KERNEL_ABI_CONTEXT_NET_NS         = 21,
 287         LTTNG_KERNEL_ABI_CONTEXT_PID_NS         = 22,
 288         LTTNG_KERNEL_ABI_CONTEXT_USER_NS        = 23,
 289         LTTNG_KERNEL_ABI_CONTEXT_UTS_NS         = 24,
 290         LTTNG_KERNEL_ABI_CONTEXT_UID            = 25,
 291         LTTNG_KERNEL_ABI_CONTEXT_EUID           = 26,
 292         LTTNG_KERNEL_ABI_CONTEXT_SUID           = 27,
 293         LTTNG_KERNEL_ABI_CONTEXT_GID            = 28,
 294         LTTNG_KERNEL_ABI_CONTEXT_EGID           = 29,
 295         LTTNG_KERNEL_ABI_CONTEXT_SGID           = 30,
 296         LTTNG_KERNEL_ABI_CONTEXT_VUID           = 31,
 297         LTTNG_KERNEL_ABI_CONTEXT_VEUID          = 32,
 298         LTTNG_KERNEL_ABI_CONTEXT_VSUID          = 33,
 299         LTTNG_KERNEL_ABI_CONTEXT_VGID           = 34,
 300         LTTNG_KERNEL_ABI_CONTEXT_VEGID          = 35,
 301         LTTNG_KERNEL_ABI_CONTEXT_VSGID          = 36,
 302         LTTNG_KERNEL_ABI_CONTEXT_TIME_NS        = 37,
 303 };
 304
 305 struct lttng_kernel_abi_perf_counter_ctx {
 306         uint32_t type;
 307         uint64_t config;
 308         char name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
 309 } __attribute__((packed));
 310
 311 #define LTTNG_KERNEL_ABI_CONTEXT_PADDING1       16
 312 #define LTTNG_KERNEL_ABI_CONTEXT_PADDING2       LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32
 313 struct lttng_kernel_abi_context {
 314         uint32_t ctx;   /*enum lttng_kernel_abi_context_type */
 315         char padding[LTTNG_KERNEL_ABI_CONTEXT_PADDING1];
 316
 317         union {
 318                 struct lttng_kernel_abi_perf_counter_ctx perf_counter;
 319                 char padding[LTTNG_KERNEL_ABI_CONTEXT_PADDING2];
 320         } u;
 321 } __attribute__((packed));
 322
 323 #define LTTNG_KERNEL_ABI_FILTER_BYTECODE_MAX_LEN                65536
 324 struct lttng_kernel_abi_filter_bytecode {
 325         uint32_t len;
 326         uint32_t reloc_offset;
 327         uint64_t seqnum;
 328         char data[0];
 329 } __attribute__((packed));
 330
 331 #define LTTNG_KERNEL_ABI_CAPTURE_BYTECODE_MAX_LEN               65536
 332 struct lttng_kernel_abi_capture_bytecode {
 333         uint32_t len;
 334         uint32_t reloc_offset;
 335         uint64_t seqnum;
 336         char data[0];
 337 } __attribute__((packed));
 338
 339 enum lttng_kernel_abi_tracker_type {
 340         LTTNG_KERNEL_ABI_TRACKER_UNKNOWN        = -1,
 341
 342         LTTNG_KERNEL_ABI_TRACKER_PID            = 0,
 343         LTTNG_KERNEL_ABI_TRACKER_VPID           = 1,
 344         LTTNG_KERNEL_ABI_TRACKER_UID            = 2,
 345         LTTNG_KERNEL_ABI_TRACKER_VUID           = 3,
 346         LTTNG_KERNEL_ABI_TRACKER_GID            = 4,
 347         LTTNG_KERNEL_ABI_TRACKER_VGID           = 5,
 348 };
 349
 350 struct lttng_kernel_abi_tracker_args {
 351         uint32_t type;  /* enum lttng_kernel_abi_tracker_type */
 352         int32_t id;
 353 };
 354
 355 /* LTTng file descriptor ioctl */
 356 /* lttng/abi-old.h reserve 0x40, 0x41, 0x42, 0x43, and 0x44. */
 357 #define LTTNG_KERNEL_ABI_SESSION                        _IO(0xF6, 0x45)
 358 #define LTTNG_KERNEL_ABI_TRACER_VERSION         \
 359         _IOR(0xF6, 0x46, struct lttng_kernel_abi_tracer_version)
 360 #define LTTNG_KERNEL_ABI_TRACEPOINT_LIST                _IO(0xF6, 0x47)
 361 #define LTTNG_KERNEL_ABI_WAIT_QUIESCENT         _IO(0xF6, 0x48)
 362 #define LTTNG_KERNEL_ABI_CALIBRATE                      \
 363         _IOWR(0xF6, 0x49, struct lttng_kernel_abi_calibrate)
 364 #define LTTNG_KERNEL_ABI_SYSCALL_LIST           _IO(0xF6, 0x4A)
 365 #define LTTNG_KERNEL_ABI_TRACER_ABI_VERSION             \
 366         _IOR(0xF6, 0x4B, struct lttng_kernel_abi_tracer_abi_version)
 367 #define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_CREATE    _IO(0xF6, 0x4C)
 368
 369 /* Session FD ioctl */
 370 /* lttng/abi-old.h reserve 0x50, 0x51, 0x52, and 0x53. */
 371 #define LTTNG_KERNEL_ABI_METADATA                       \
 372         _IOW(0xF6, 0x54, struct lttng_kernel_abi_channel)
 373 #define LTTNG_KERNEL_ABI_CHANNEL                        \
 374         _IOW(0xF6, 0x55, struct lttng_kernel_abi_channel)
 375 #define LTTNG_KERNEL_ABI_SESSION_START          _IO(0xF6, 0x56)
 376 #define LTTNG_KERNEL_ABI_SESSION_STOP           _IO(0xF6, 0x57)
 377 #define LTTNG_KERNEL_ABI_SESSION_TRACK_PID              \
 378         _IOW(0xF6, 0x58, int32_t)
 379 #define LTTNG_KERNEL_ABI_SESSION_UNTRACK_PID    \
 380         _IOW(0xF6, 0x59, int32_t)
 381
 382 /*
 383  * ioctl 0x58 and 0x59 are duplicated here. It works, since _IOR vs _IO
 384  * are generating two different ioctl numbers, but this was not done on
 385  * purpose. We should generally try to avoid those duplications.
 386  */
 387 #define LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_PIDS      _IO(0xF6, 0x58)
 388 #define LTTNG_KERNEL_ABI_SESSION_METADATA_REGEN _IO(0xF6, 0x59)
 389
 390 /* lttng/abi-old.h reserve 0x5A and 0x5B. */
 391 #define LTTNG_KERNEL_ABI_SESSION_STATEDUMP              _IO(0xF6, 0x5C)
 392 #define LTTNG_KERNEL_ABI_SESSION_SET_NAME               \
 393         _IOW(0xF6, 0x5D, struct lttng_kernel_abi_session_name)
 394 #define LTTNG_KERNEL_ABI_SESSION_SET_CREATION_TIME              \
 395         _IOW(0xF6, 0x5E, struct lttng_kernel_abi_session_creation_time)
 396
 397 /* Channel FD ioctl */
 398 /* lttng/abi-old.h reserve 0x60 and 0x61. */
 399 #define LTTNG_KERNEL_ABI_STREAM                 _IO(0xF6, 0x62)
 400 #define LTTNG_KERNEL_ABI_EVENT                  \
 401         _IOW(0xF6, 0x63, struct lttng_kernel_abi_event)
 402 #define LTTNG_KERNEL_ABI_SYSCALL_MASK           \
 403         _IOWR(0xF6, 0x64, struct lttng_kernel_abi_syscall_mask)
 404
 405 /* Event and Channel FD ioctl */
 406 /* lttng/abi-old.h reserve 0x70. */
 407 #define LTTNG_KERNEL_ABI_CONTEXT                        \
 408         _IOW(0xF6, 0x71, struct lttng_kernel_abi_context)
 409
 410 /* Event, Event notifier, Channel, Counter and Session ioctl */
 411 /* lttng/abi-old.h reserve 0x80 and 0x81. */
 412 #define LTTNG_KERNEL_ABI_ENABLE                 _IO(0xF6, 0x82)
 413 #define LTTNG_KERNEL_ABI_DISABLE                        _IO(0xF6, 0x83)
 414
 415 /* Trigger group and session ioctl */
 416 #define LTTNG_KERNEL_ABI_COUNTER \
 417         _IOW(0xF6, 0x84, struct lttng_kernel_abi_counter_conf)
 418
 419 /* Event and Event notifier FD ioctl */
 420 #define LTTNG_KERNEL_ABI_FILTER                 _IO(0xF6, 0x90)
 421 #define LTTNG_KERNEL_ABI_ADD_CALLSITE           _IO(0xF6, 0x91)
 422
 423 /* Session FD ioctl (continued) */
 424 #define LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_IDS       \
 425         _IOW(0xF6, 0xA0, struct lttng_kernel_abi_tracker_args)
 426 #define LTTNG_KERNEL_ABI_SESSION_TRACK_ID               \
 427         _IOW(0xF6, 0xA1, struct lttng_kernel_abi_tracker_args)
 428 #define LTTNG_KERNEL_ABI_SESSION_UNTRACK_ID             \
 429         _IOW(0xF6, 0xA2, struct lttng_kernel_abi_tracker_args)
 430
 431 /* Event notifier group file descriptor ioctl */
 432 #define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_CREATE \
 433         _IOW(0xF6, 0xB0, struct lttng_kernel_abi_event_notifier)
 434 #define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD \
 435         _IO(0xF6, 0xB1)
 436
 437 /* Event notifier file descriptor ioctl */
 438 #define LTTNG_KERNEL_ABI_CAPTURE                        _IO(0xF6, 0xB8)
 439
 440 /* Counter file descriptor ioctl */
 441 #define LTTNG_KERNEL_ABI_COUNTER_READ \
 442         _IOWR(0xF6, 0xC0, struct lttng_kernel_abi_counter_read)
 443 #define LTTNG_KERNEL_ABI_COUNTER_AGGREGATE \
 444         _IOWR(0xF6, 0xC1, struct lttng_kernel_abi_counter_aggregate)
 445 #define LTTNG_KERNEL_ABI_COUNTER_CLEAR \
 446         _IOW(0xF6, 0xC2, struct lttng_kernel_abi_counter_clear)
 447
 448
 449 /*
 450  * LTTng-specific ioctls for the lib ringbuffer.
 451  *
 452  * Operations applying to the current sub-buffer need to occur between
 453  * a get/put or get_next/put_next ioctl pair.
 454  */
 455
 456 /* returns the timestamp begin of the current sub-buffer */
 457 #define LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_BEGIN        _IOR(0xF6, 0x20, uint64_t)
 458 /* returns the timestamp end of the current sub-buffer */
 459 #define LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_END          _IOR(0xF6, 0x21, uint64_t)
 460 /* returns the number of events discarded of the current sub-buffer */
 461 #define LTTNG_KERNEL_ABI_RING_BUFFER_GET_EVENTS_DISCARDED       _IOR(0xF6, 0x22, uint64_t)
 462 /* returns the packet payload size of the current sub-buffer */
 463 #define LTTNG_KERNEL_ABI_RING_BUFFER_GET_CONTENT_SIZE           _IOR(0xF6, 0x23, uint64_t)
 464 /* returns the packet size of the current sub-buffer*/
 465 #define LTTNG_KERNEL_ABI_RING_BUFFER_GET_PACKET_SIZE            _IOR(0xF6, 0x24, uint64_t)
 466 /* returns the stream id (invariant for the stream) */
 467 #define LTTNG_KERNEL_ABI_RING_BUFFER_GET_STREAM_ID              _IOR(0xF6, 0x25, uint64_t)
 468 /* returns the current timestamp as perceived from the tracer */
 469 #define LTTNG_KERNEL_ABI_RING_BUFFER_GET_CURRENT_TIMESTAMP      _IOR(0xF6, 0x26, uint64_t)
 470 /* returns the packet sequence number of the current sub-buffer */
 471 #define LTTNG_KERNEL_ABI_RING_BUFFER_GET_SEQ_NUM                _IOR(0xF6, 0x27, uint64_t)
 472 /* returns the stream instance id (invariant for the stream) */
 473 #define LTTNG_KERNEL_ABI_RING_BUFFER_INSTANCE_ID                _IOR(0xF6, 0x28, uint64_t)
 474
 475 /*
 476  * Those ioctl numbers use the wrong direction, but are kept for ABI backward
 477  * compatibility.
 478  */
 479 #define LTTNG_KERNEL_ABI_OLD_SESSION_SET_NAME           \
 480         _IOR(0xF6, 0x5D, struct lttng_kernel_abi_session_name)
 481 #define LTTNG_KERNEL_ABI_OLD_SESSION_SET_CREATION_TIME  \
 482         _IOR(0xF6, 0x5E, struct lttng_kernel_abi_session_creation_time)
 483 #define LTTNG_KERNEL_ABI_OLD_SESSION_TRACK_PID          \
 484         _IOR(0xF6, 0x58, int32_t)
 485 #define LTTNG_KERNEL_ABI_OLD_SESSION_UNTRACK_PID        \
 486         _IOR(0xF6, 0x59, int32_t)
 487 #define LTTNG_KERNEL_ABI_OLD_SESSION_LIST_TRACKER_IDS   \
 488         _IOR(0xF6, 0xA0, struct lttng_kernel_abi_tracker_args)
 489 #define LTTNG_KERNEL_ABI_OLD_SESSION_TRACK_ID           \
 490         _IOR(0xF6, 0xA1, struct lttng_kernel_abi_tracker_args)
 491 #define LTTNG_KERNEL_ABI_OLD_SESSION_UNTRACK_ID         \
 492         _IOR(0xF6, 0xA2, struct lttng_kernel_abi_tracker_args)
 493
 494 #ifdef CONFIG_COMPAT
 495 /* returns the timestamp begin of the current sub-buffer */
 496 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_TIMESTAMP_BEGIN \
 497         LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_BEGIN
 498 /* returns the timestamp end of the current sub-buffer */
 499 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_TIMESTAMP_END \
 500         LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_END
 501 /* returns the number of events discarded of the current sub-buffer */
 502 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_EVENTS_DISCARDED \
 503         LTTNG_KERNEL_ABI_RING_BUFFER_GET_EVENTS_DISCARDED
 504 /* returns the packet payload size of the current sub-buffer */
 505 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_CONTENT_SIZE \
 506         LTTNG_KERNEL_ABI_RING_BUFFER_GET_CONTENT_SIZE
 507 /* returns the packet size of the current sub-buffer */
 508 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_PACKET_SIZE \
 509         LTTNG_KERNEL_ABI_RING_BUFFER_GET_PACKET_SIZE
 510 /* returns the stream id (invariant for the stream) */
 511 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_STREAM_ID \
 512         LTTNG_KERNEL_ABI_RING_BUFFER_GET_STREAM_ID
 513 /* returns the current timestamp as perceived from the tracer */
 514 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_CURRENT_TIMESTAMP \
 515         LTTNG_KERNEL_ABI_RING_BUFFER_GET_CURRENT_TIMESTAMP
 516 /* returns the packet sequence number of the current sub-buffer */
 517 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_SEQ_NUM \
 518         LTTNG_KERNEL_ABI_RING_BUFFER_GET_SEQ_NUM
 519 /* returns the stream instance id (invariant for the stream) */
 520 #define LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_INSTANCE_ID \
 521         LTTNG_KERNEL_ABI_RING_BUFFER_INSTANCE_ID
 522 #endif /* CONFIG_COMPAT */
 523
 524 #endif /* _LTTNG_ABI_H */