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_MODULES_ABI_MAJOR_VERSION         2
  21 #define LTTNG_MODULES_ABI_MINOR_VERSION         6
  22
  23 #define LTTNG_KERNEL_SYM_NAME_LEN       256
  24 #define LTTNG_KERNEL_SESSION_NAME_LEN   256
  25 #define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN  26
  26
  27 enum lttng_kernel_instrumentation {
  28         LTTNG_KERNEL_TRACEPOINT = 0,
  29         LTTNG_KERNEL_KPROBE     = 1,
  30         LTTNG_KERNEL_FUNCTION   = 2,
  31         LTTNG_KERNEL_KRETPROBE  = 3,
  32         LTTNG_KERNEL_NOOP       = 4,    /* not hooked */
  33         LTTNG_KERNEL_SYSCALL    = 5,
  34         LTTNG_KERNEL_UPROBE     = 6,
  35 };
  36
  37 /*
  38  * LTTng consumer mode
  39  */
  40 enum lttng_kernel_output {
  41         LTTNG_KERNEL_SPLICE     = 0,
  42         LTTNG_KERNEL_MMAP       = 1,
  43 };
  44
  45 /*
  46  * LTTng DebugFS ABI structures.
  47  */
  48 #define LTTNG_KERNEL_CHANNEL_PADDING    LTTNG_KERNEL_SYM_NAME_LEN + 32
  49 struct lttng_kernel_channel {
  50         uint64_t subbuf_size;                   /* in bytes */
  51         uint64_t num_subbuf;
  52         unsigned int switch_timer_interval;     /* usecs */
  53         unsigned int read_timer_interval;       /* usecs */
  54         uint32_t output;                        /* enum lttng_kernel_output (splice, mmap) */
  55         int overwrite;                          /* 1: overwrite, 0: discard */
  56         char padding[LTTNG_KERNEL_CHANNEL_PADDING];
  57 } __attribute__((packed));
  58
  59 struct lttng_kernel_kretprobe {
  60         uint64_t addr;
  61
  62         uint64_t offset;
  63         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  64 } __attribute__((packed));
  65
  66 /*
  67  * Either addr is used, or symbol_name and offset.
  68  */
  69 struct lttng_kernel_kprobe {
  70         uint64_t addr;
  71
  72         uint64_t offset;
  73         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  74 } __attribute__((packed));
  75
  76 struct lttng_kernel_function_tracer {
  77         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  78 } __attribute__((packed));
  79
  80 struct lttng_kernel_uprobe {
  81         int fd;
  82 } __attribute__((packed));
  83
  84 struct lttng_kernel_event_callsite_uprobe {
  85         uint64_t offset;
  86 } __attribute__((packed));
  87
  88 struct lttng_kernel_event_callsite {
  89         union {
  90                 struct lttng_kernel_event_callsite_uprobe uprobe;
  91         } u;
  92 } __attribute__((packed));
  93
  94 enum lttng_kernel_syscall_entryexit {
  95         LTTNG_KERNEL_SYSCALL_ENTRYEXIT  = 0,
  96         LTTNG_KERNEL_SYSCALL_ENTRY      = 1,
  97         LTTNG_KERNEL_SYSCALL_EXIT       = 2,
  98 };
  99
 100 enum lttng_kernel_syscall_abi {
 101         LTTNG_KERNEL_SYSCALL_ABI_ALL = 0,
 102         LTTNG_KERNEL_SYSCALL_ABI_NATIVE = 1,
 103         LTTNG_KERNEL_SYSCALL_ABI_COMPAT = 2,
 104 };
 105
 106 enum lttng_kernel_syscall_match {
 107         LTTNG_KERNEL_SYSCALL_MATCH_NAME = 0,
 108         LTTNG_KERNEL_SYSCALL_MATCH_NR = 1,              /* Not implemented. */
 109 };
 110
 111 struct lttng_kernel_syscall {
 112         uint8_t entryexit;      /* enum lttng_kernel_syscall_entryexit */
 113         uint8_t abi;            /* enum lttng_kernel_syscall_abi */
 114         uint8_t match;          /* enum lttng_kernel_syscall_match */
 115         uint8_t padding;
 116         uint32_t nr;            /* For LTTNG_SYSCALL_MATCH_NR */
 117 } __attribute__((packed));
 118
 119 /*
 120  * For syscall tracing, name = "*" means "enable all".
 121  */
 122 #define LTTNG_KERNEL_EVENT_PADDING1     8
 123 #define LTTNG_KERNEL_EVENT_PADDING2     LTTNG_KERNEL_SYM_NAME_LEN + 32
 124 struct lttng_kernel_event {
 125         char name[LTTNG_KERNEL_SYM_NAME_LEN];   /* event name */
 126         uint32_t instrumentation;               /* enum lttng_kernel_instrumentation */
 127         uint64_t token;                         /* User-provided token */
 128         char padding[LTTNG_KERNEL_EVENT_PADDING1];
 129
 130         /* Per instrumentation type configuration */
 131         union {
 132                 struct lttng_kernel_kretprobe kretprobe;
 133                 struct lttng_kernel_kprobe kprobe;
 134                 struct lttng_kernel_function_tracer ftrace;
 135                 struct lttng_kernel_uprobe uprobe;
 136                 struct lttng_kernel_syscall syscall;
 137                 char padding[LTTNG_KERNEL_EVENT_PADDING2];
 138         } u;
 139 } __attribute__((packed));
 140
 141 #define LTTNG_KERNEL_EVENT_NOTIFIER_PADDING     32
 142 struct lttng_kernel_event_notifier {
 143         struct lttng_kernel_event event;
 144         uint64_t error_counter_index;
 145
 146         char padding[LTTNG_KERNEL_EVENT_NOTIFIER_PADDING];
 147 } __attribute__((packed));
 148
 149 #define LTTNG_KERNEL_COUNTER_DIMENSION_MAX      4
 150 #define LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
 151 struct lttng_kernel_event_notifier_notification {
 152         uint64_t token;
 153         uint16_t capture_buf_size;
 154         char padding[LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING];
 155 } __attribute__((packed));
 156
 157 enum lttng_kernel_key_token_type {
 158         LTTNG_KERNEL_KEY_TOKEN_STRING = 0,      /* arg: string_ptr. */
 159         LTTNG_KERNEL_KEY_TOKEN_EVENT_NAME = 1,  /* no arg. */
 160         LTTNG_KERNEL_KEY_TOKEN_PROVIDER_NAME = 2,       /* no arg. */
 161 };
 162
 163 #define LTTNG_KERNEL_KEY_ARG_PADDING1           60
 164 #define LTTNG_KERNEL_KEY_TOKEN_STRING_LEN_MAX   256
 165 struct lttng_kernel_key_token {
 166         uint32_t type;  /* enum lttng_kernel_key_token_type */
 167         union {
 168                 uint64_t string_ptr;
 169                 char padding[LTTNG_KERNEL_KEY_ARG_PADDING1];
 170         } arg;
 171 } __attribute__((packed));
 172
 173 #define LTTNG_KERNEL_NR_KEY_TOKEN 4
 174 struct lttng_kernel_counter_key_dimension {
 175         uint32_t nr_key_tokens;
 176         struct lttng_kernel_key_token key_tokens[LTTNG_KERNEL_NR_KEY_TOKEN];
 177 } __attribute__((packed));
 178
 179 struct lttng_kernel_counter_key {
 180         uint32_t nr_dimensions;
 181         struct lttng_kernel_counter_key_dimension key_dimensions[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
 182 } __attribute__((packed));
 183
 184 #define LTTNG_KERNEL_COUNTER_EVENT_PADDING1     16
 185 struct lttng_kernel_counter_event {
 186         struct lttng_kernel_event event;
 187         struct lttng_kernel_counter_key key;
 188         char padding[LTTNG_KERNEL_COUNTER_EVENT_PADDING1];
 189 } __attribute__((packed));
 190
 191 enum lttng_kernel_counter_arithmetic {
 192         LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR = 0,
 193 };
 194
 195 enum lttng_kernel_counter_bitness {
 196         LTTNG_KERNEL_COUNTER_BITNESS_32 = 0,
 197         LTTNG_KERNEL_COUNTER_BITNESS_64 = 1,
 198 };
 199
 200 struct lttng_kernel_counter_dimension {
 201         uint64_t size;
 202         uint64_t underflow_index;
 203         uint64_t overflow_index;
 204         uint8_t has_underflow;
 205         uint8_t has_overflow;
 206 } __attribute__((packed));
 207
 208 #define LTTNG_KERNEL_COUNTER_CONF_PADDING1      67
 209 struct lttng_kernel_counter_conf {
 210         uint32_t arithmetic;    /* enum lttng_kernel_counter_arithmetic */
 211         uint32_t bitness;       /* enum lttng_kernel_counter_bitness */
 212         uint32_t number_dimensions;
 213         int64_t global_sum_step;
 214         struct lttng_kernel_counter_dimension dimensions[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
 215         uint8_t coalesce_hits;
 216         char padding[LTTNG_KERNEL_COUNTER_CONF_PADDING1];
 217 } __attribute__((packed));
 218
 219 struct lttng_kernel_counter_index {
 220         uint32_t number_dimensions;
 221         uint64_t dimension_indexes[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
 222 } __attribute__((packed));
 223
 224 struct lttng_kernel_counter_value {
 225         int64_t value;
 226         uint8_t underflow;
 227         uint8_t overflow;
 228 } __attribute__((packed));
 229
 230 #define LTTNG_KERNEL_COUNTER_READ_PADDING 32
 231 struct lttng_kernel_counter_read {
 232         struct lttng_kernel_counter_index index;
 233         int32_t cpu;    /* -1 for global counter, >= 0 for specific cpu. */
 234         struct lttng_kernel_counter_value value;        /* output */
 235         char padding[LTTNG_KERNEL_COUNTER_READ_PADDING];
 236 } __attribute__((packed));
 237
 238 #define LTTNG_KERNEL_COUNTER_AGGREGATE_PADDING 32
 239 struct lttng_kernel_counter_aggregate {
 240         struct lttng_kernel_counter_index index;
 241         struct lttng_kernel_counter_value value;        /* output */
 242         char padding[LTTNG_KERNEL_COUNTER_AGGREGATE_PADDING];
 243 } __attribute__((packed));
 244
 245 #define LTTNG_KERNEL_COUNTER_CLEAR_PADDING 32
 246 struct lttng_kernel_counter_clear {
 247         struct lttng_kernel_counter_index index;
 248         char padding[LTTNG_KERNEL_COUNTER_CLEAR_PADDING];
 249 } __attribute__((packed));
 250
 251 #define LTTNG_KERNEL_COUNTER_KEY_LEN 256
 252 #define LTTNG_KERNEL_COUNTER_MAP_DESCRIPTOR_PADDING 32
 253 struct lttng_kernel_counter_map_descriptor {
 254         uint64_t descriptor_index;      /* input. [ 0 .. nr_descriptors - 1 ] */
 255
 256         uint32_t dimension;             /* outputs */
 257         uint64_t array_index;
 258         uint64_t user_token;
 259         char key[LTTNG_KERNEL_COUNTER_KEY_LEN];
 260
 261         char padding[LTTNG_KERNEL_COUNTER_MAP_DESCRIPTOR_PADDING];
 262 } __attribute__((packed));
 263
 264 struct lttng_kernel_tracer_version {
 265         uint32_t major;
 266         uint32_t minor;
 267         uint32_t patchlevel;
 268 } __attribute__((packed));
 269
 270 struct lttng_kernel_tracer_abi_version {
 271         uint32_t major;
 272         uint32_t minor;
 273 } __attribute__((packed));
 274
 275 struct lttng_kernel_session_name {
 276         char name[LTTNG_KERNEL_SESSION_NAME_LEN];
 277 } __attribute__((packed));
 278
 279 struct lttng_kernel_session_creation_time {
 280         char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
 281 } __attribute__((packed));
 282
 283 enum lttng_kernel_calibrate_type {
 284         LTTNG_KERNEL_CALIBRATE_KRETPROBE,
 285 };
 286
 287 struct lttng_kernel_calibrate {
 288         uint32_t type;  /* enum lttng_kernel_calibrate_type (input) */
 289 } __attribute__((packed));
 290
 291 struct lttng_kernel_syscall_mask {
 292         uint32_t len;   /* in bits */
 293         char mask[];
 294 } __attribute__((packed));
 295
 296 enum lttng_kernel_context_type {
 297         LTTNG_KERNEL_CONTEXT_PID                = 0,
 298         LTTNG_KERNEL_CONTEXT_PERF_COUNTER       = 1,
 299         LTTNG_KERNEL_CONTEXT_PROCNAME           = 2,
 300         LTTNG_KERNEL_CONTEXT_PRIO               = 3,
 301         LTTNG_KERNEL_CONTEXT_NICE               = 4,
 302         LTTNG_KERNEL_CONTEXT_VPID               = 5,
 303         LTTNG_KERNEL_CONTEXT_TID                = 6,
 304         LTTNG_KERNEL_CONTEXT_VTID               = 7,
 305         LTTNG_KERNEL_CONTEXT_PPID               = 8,
 306         LTTNG_KERNEL_CONTEXT_VPPID              = 9,
 307         LTTNG_KERNEL_CONTEXT_HOSTNAME           = 10,
 308         LTTNG_KERNEL_CONTEXT_CPU_ID             = 11,
 309         LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE      = 12,
 310         LTTNG_KERNEL_CONTEXT_PREEMPTIBLE        = 13,
 311         LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE    = 14,
 312         LTTNG_KERNEL_CONTEXT_MIGRATABLE         = 15,
 313         LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL   = 16,
 314         LTTNG_KERNEL_CONTEXT_CALLSTACK_USER     = 17,
 315         LTTNG_KERNEL_CONTEXT_CGROUP_NS          = 18,
 316         LTTNG_KERNEL_CONTEXT_IPC_NS             = 19,
 317         LTTNG_KERNEL_CONTEXT_MNT_NS             = 20,
 318         LTTNG_KERNEL_CONTEXT_NET_NS             = 21,
 319         LTTNG_KERNEL_CONTEXT_PID_NS             = 22,
 320         LTTNG_KERNEL_CONTEXT_USER_NS            = 23,
 321         LTTNG_KERNEL_CONTEXT_UTS_NS             = 24,
 322         LTTNG_KERNEL_CONTEXT_UID                = 25,
 323         LTTNG_KERNEL_CONTEXT_EUID               = 26,
 324         LTTNG_KERNEL_CONTEXT_SUID               = 27,
 325         LTTNG_KERNEL_CONTEXT_GID                = 28,
 326         LTTNG_KERNEL_CONTEXT_EGID               = 29,
 327         LTTNG_KERNEL_CONTEXT_SGID               = 30,
 328         LTTNG_KERNEL_CONTEXT_VUID               = 31,
 329         LTTNG_KERNEL_CONTEXT_VEUID              = 32,
 330         LTTNG_KERNEL_CONTEXT_VSUID              = 33,
 331         LTTNG_KERNEL_CONTEXT_VGID               = 34,
 332         LTTNG_KERNEL_CONTEXT_VEGID              = 35,
 333         LTTNG_KERNEL_CONTEXT_VSGID              = 36,
 334         LTTNG_KERNEL_CONTEXT_TIME_NS            = 37,
 335 };
 336
 337 struct lttng_kernel_perf_counter_ctx {
 338         uint32_t type;
 339         uint64_t config;
 340         char name[LTTNG_KERNEL_SYM_NAME_LEN];
 341 } __attribute__((packed));
 342
 343 #define LTTNG_KERNEL_CONTEXT_PADDING1   16
 344 #define LTTNG_KERNEL_CONTEXT_PADDING2   LTTNG_KERNEL_SYM_NAME_LEN + 32
 345 struct lttng_kernel_context {
 346         uint32_t ctx;   /*enum lttng_kernel_context_type */
 347         char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
 348
 349         union {
 350                 struct lttng_kernel_perf_counter_ctx perf_counter;
 351                 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
 352         } u;
 353 } __attribute__((packed));
 354
 355 #define LTTNG_KERNEL_FILTER_BYTECODE_MAX_LEN            65536
 356 struct lttng_kernel_filter_bytecode {
 357         uint32_t len;
 358         uint32_t reloc_offset;
 359         uint64_t seqnum;
 360         char data[0];
 361 } __attribute__((packed));
 362
 363 #define LTTNG_KERNEL_CAPTURE_BYTECODE_MAX_LEN           65536
 364 struct lttng_kernel_capture_bytecode {
 365         uint32_t len;
 366         uint32_t reloc_offset;
 367         uint64_t seqnum;
 368         char data[0];
 369 } __attribute__((packed));
 370
 371 enum lttng_kernel_tracker_type {
 372         LTTNG_KERNEL_TRACKER_UNKNOWN            = -1,
 373
 374         LTTNG_KERNEL_TRACKER_PID                = 0,
 375         LTTNG_KERNEL_TRACKER_VPID               = 1,
 376         LTTNG_KERNEL_TRACKER_UID                = 2,
 377         LTTNG_KERNEL_TRACKER_VUID               = 3,
 378         LTTNG_KERNEL_TRACKER_GID                = 4,
 379         LTTNG_KERNEL_TRACKER_VGID               = 5,
 380 };
 381
 382 struct lttng_kernel_tracker_args {
 383         uint32_t type;  /* enum lttng_kernel_tracker_type */
 384         int32_t id;
 385 };
 386
 387 /* LTTng file descriptor ioctl */
 388 /* lttng/abi-old.h reserve 0x40, 0x41, 0x42, 0x43, and 0x44. */
 389 #define LTTNG_KERNEL_SESSION                    _IO(0xF6, 0x45)
 390 #define LTTNG_KERNEL_TRACER_VERSION             \
 391         _IOR(0xF6, 0x46, struct lttng_kernel_tracer_version)
 392 #define LTTNG_KERNEL_TRACEPOINT_LIST            _IO(0xF6, 0x47)
 393 #define LTTNG_KERNEL_WAIT_QUIESCENT             _IO(0xF6, 0x48)
 394 #define LTTNG_KERNEL_CALIBRATE                  \
 395         _IOWR(0xF6, 0x49, struct lttng_kernel_calibrate)
 396 #define LTTNG_KERNEL_SYSCALL_LIST               _IO(0xF6, 0x4A)
 397 #define LTTNG_KERNEL_TRACER_ABI_VERSION         \
 398         _IOR(0xF6, 0x4B, struct lttng_kernel_tracer_abi_version)
 399 #define LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_CREATE    _IO(0xF6, 0x4C)
 400
 401 /* Session FD ioctl */
 402 /* lttng/abi-old.h reserve 0x50, 0x51, 0x52, and 0x53. */
 403 #define LTTNG_KERNEL_METADATA                   \
 404         _IOW(0xF6, 0x54, struct lttng_kernel_channel)
 405 #define LTTNG_KERNEL_CHANNEL                    \
 406         _IOW(0xF6, 0x55, struct lttng_kernel_channel)
 407 #define LTTNG_KERNEL_SESSION_START              _IO(0xF6, 0x56)
 408 #define LTTNG_KERNEL_SESSION_STOP               _IO(0xF6, 0x57)
 409 #define LTTNG_KERNEL_SESSION_TRACK_PID          \
 410         _IOR(0xF6, 0x58, int32_t)
 411 #define LTTNG_KERNEL_SESSION_UNTRACK_PID        \
 412         _IOR(0xF6, 0x59, int32_t)
 413
 414 /*
 415  * ioctl 0x58 and 0x59 are duplicated here. It works, since _IOR vs _IO
 416  * are generating two different ioctl numbers, but this was not done on
 417  * purpose. We should generally try to avoid those duplications.
 418  */
 419 #define LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS  _IO(0xF6, 0x58)
 420 #define LTTNG_KERNEL_SESSION_METADATA_REGEN     _IO(0xF6, 0x59)
 421
 422 /* lttng/abi-old.h reserve 0x5A and 0x5B. */
 423 #define LTTNG_KERNEL_SESSION_STATEDUMP          _IO(0xF6, 0x5C)
 424 #define LTTNG_KERNEL_SESSION_SET_NAME           \
 425         _IOR(0xF6, 0x5D, struct lttng_kernel_session_name)
 426 #define LTTNG_KERNEL_SESSION_SET_CREATION_TIME          \
 427         _IOR(0xF6, 0x5E, struct lttng_kernel_session_creation_time)
 428
 429 /* Channel FD ioctl */
 430 /* lttng/abi-old.h reserve 0x60 and 0x61. */
 431 #define LTTNG_KERNEL_STREAM                     _IO(0xF6, 0x62)
 432 #define LTTNG_KERNEL_EVENT                      \
 433         _IOW(0xF6, 0x63, struct lttng_kernel_event)
 434 /* LTTNG_KERNEL_SYSCALL_MASK applies to both channel and counter fds. */
 435 #define LTTNG_KERNEL_SYSCALL_MASK               \
 436         _IOWR(0xF6, 0x64, struct lttng_kernel_syscall_mask)
 437
 438 /* Event and Channel FD ioctl */
 439 /* lttng/abi-old.h reserve 0x70. */
 440 #define LTTNG_KERNEL_CONTEXT                    \
 441         _IOW(0xF6, 0x71, struct lttng_kernel_context)
 442
 443 /* Event, Event notifier, Channel, Counter and Session ioctl */
 444 /* lttng/abi-old.h reserve 0x80 and 0x81. */
 445 #define LTTNG_KERNEL_ENABLE                     _IO(0xF6, 0x82)
 446 #define LTTNG_KERNEL_DISABLE                    _IO(0xF6, 0x83)
 447
 448 /* Trigger group and session ioctl */
 449 #define LTTNG_KERNEL_COUNTER \
 450         _IOW(0xF6, 0x84, struct lttng_kernel_counter_conf)
 451
 452 /* Event and Event notifier FD ioctl */
 453 #define LTTNG_KERNEL_FILTER                     _IO(0xF6, 0x90)
 454 #define LTTNG_KERNEL_ADD_CALLSITE               _IO(0xF6, 0x91)
 455
 456 /* Session FD ioctl (continued) */
 457 #define LTTNG_KERNEL_SESSION_LIST_TRACKER_IDS   \
 458         _IOR(0xF6, 0xA0, struct lttng_kernel_tracker_args)
 459 #define LTTNG_KERNEL_SESSION_TRACK_ID           \
 460         _IOR(0xF6, 0xA1, struct lttng_kernel_tracker_args)
 461 #define LTTNG_KERNEL_SESSION_UNTRACK_ID         \
 462         _IOR(0xF6, 0xA2, struct lttng_kernel_tracker_args)
 463
 464 /* Event notifier group file descriptor ioctl */
 465 #define LTTNG_KERNEL_EVENT_NOTIFIER_CREATE \
 466         _IOW(0xF6, 0xB0, struct lttng_kernel_event_notifier)
 467 #define LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD \
 468         _IO(0xF6, 0xB1)
 469
 470 /* Event notifier file descriptor ioctl */
 471 #define LTTNG_KERNEL_CAPTURE                    _IO(0xF6, 0xB8)
 472
 473 /* Counter file descriptor ioctl */
 474 #define LTTNG_KERNEL_COUNTER_READ \
 475         _IOWR(0xF6, 0xC0, struct lttng_kernel_counter_read)
 476 #define LTTNG_KERNEL_COUNTER_AGGREGATE \
 477         _IOWR(0xF6, 0xC1, struct lttng_kernel_counter_aggregate)
 478 #define LTTNG_KERNEL_COUNTER_CLEAR \
 479         _IOW(0xF6, 0xC2, struct lttng_kernel_counter_clear)
 480 #define LTTNG_KERNEL_COUNTER_MAP_NR_DESCRIPTORS \
 481         _IOR(0xF6, 0xC3, uint64_t)
 482 #define LTTNG_KERNEL_COUNTER_MAP_DESCRIPTOR \
 483         _IOWR(0xF6, 0xC4, struct lttng_kernel_counter_map_descriptor)
 484 #define LTTNG_KERNEL_COUNTER_EVENT \
 485         _IOW(0xF6, 0xC5, struct lttng_kernel_counter_event)
 486
 487 /*
 488  * LTTng-specific ioctls for the lib ringbuffer.
 489  *
 490  * Operations applying to the current sub-buffer need to occur between
 491  * a get/put or get_next/put_next ioctl pair.
 492  */
 493
 494 /* returns the timestamp begin of the current sub-buffer */
 495 #define LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN   _IOR(0xF6, 0x20, uint64_t)
 496 /* returns the timestamp end of the current sub-buffer */
 497 #define LTTNG_RING_BUFFER_GET_TIMESTAMP_END     _IOR(0xF6, 0x21, uint64_t)
 498 /* returns the number of events discarded of the current sub-buffer */
 499 #define LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED  _IOR(0xF6, 0x22, uint64_t)
 500 /* returns the packet payload size of the current sub-buffer */
 501 #define LTTNG_RING_BUFFER_GET_CONTENT_SIZE      _IOR(0xF6, 0x23, uint64_t)
 502 /* returns the packet size of the current sub-buffer*/
 503 #define LTTNG_RING_BUFFER_GET_PACKET_SIZE       _IOR(0xF6, 0x24, uint64_t)
 504 /* returns the stream id (invariant for the stream) */
 505 #define LTTNG_RING_BUFFER_GET_STREAM_ID         _IOR(0xF6, 0x25, uint64_t)
 506 /* returns the current timestamp as perceived from the tracer */
 507 #define LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP _IOR(0xF6, 0x26, uint64_t)
 508 /* returns the packet sequence number of the current sub-buffer */
 509 #define LTTNG_RING_BUFFER_GET_SEQ_NUM           _IOR(0xF6, 0x27, uint64_t)
 510 /* returns the stream instance id (invariant for the stream) */
 511 #define LTTNG_RING_BUFFER_INSTANCE_ID           _IOR(0xF6, 0x28, uint64_t)
 512
 513 #ifdef CONFIG_COMPAT
 514 /* returns the timestamp begin of the current sub-buffer */
 515 #define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_BEGIN \
 516         LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN
 517 /* returns the timestamp end of the current sub-buffer */
 518 #define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_END \
 519         LTTNG_RING_BUFFER_GET_TIMESTAMP_END
 520 /* returns the number of events discarded of the current sub-buffer */
 521 #define LTTNG_RING_BUFFER_COMPAT_GET_EVENTS_DISCARDED \
 522         LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED
 523 /* returns the packet payload size of the current sub-buffer */
 524 #define LTTNG_RING_BUFFER_COMPAT_GET_CONTENT_SIZE \
 525         LTTNG_RING_BUFFER_GET_CONTENT_SIZE
 526 /* returns the packet size of the current sub-buffer */
 527 #define LTTNG_RING_BUFFER_COMPAT_GET_PACKET_SIZE \
 528         LTTNG_RING_BUFFER_GET_PACKET_SIZE
 529 /* returns the stream id (invariant for the stream) */
 530 #define LTTNG_RING_BUFFER_COMPAT_GET_STREAM_ID \
 531         LTTNG_RING_BUFFER_GET_STREAM_ID
 532 /* returns the current timestamp as perceived from the tracer */
 533 #define LTTNG_RING_BUFFER_COMPAT_GET_CURRENT_TIMESTAMP \
 534         LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP
 535 /* returns the packet sequence number of the current sub-buffer */
 536 #define LTTNG_RING_BUFFER_COMPAT_GET_SEQ_NUM    \
 537         LTTNG_RING_BUFFER_GET_SEQ_NUM
 538 /* returns the stream instance id (invariant for the stream) */
 539 #define LTTNG_RING_BUFFER_COMPAT_INSTANCE_ID    \
 540         LTTNG_RING_BUFFER_INSTANCE_ID
 541 #endif /* CONFIG_COMPAT */
 542
 543 #endif /* _LTTNG_ABI_H */