include/lttng/ust-abi.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * LTTng-UST ABI header
   7  */
   8
   9 #ifndef _LTTNG_UST_ABI_H
  10 #define _LTTNG_UST_ABI_H
  11
  12 #include <stdint.h>
  13 #include <lttng/ust-compiler.h>
  14
  15 #define LTTNG_UST_ABI_SYM_NAME_LEN                      256
  16 #define LTTNG_UST_ABI_PROCNAME_LEN              16
  17
  18 /* UST comm magic number, used to validate protocol and endianness. */
  19 #define LTTNG_UST_ABI_COMM_MAGIC                        0xC57C57C5
  20
  21 /* Version for ABI between liblttng-ust, sessiond, consumerd */
  22 #define LTTNG_UST_ABI_MAJOR_VERSION                     9
  23 #define LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE   8
  24 #define LTTNG_UST_ABI_MINOR_VERSION             0
  25
  26 enum lttng_ust_abi_instrumentation {
  27         LTTNG_UST_ABI_TRACEPOINT        = 0,
  28         LTTNG_UST_ABI_PROBE             = 1,
  29         LTTNG_UST_ABI_FUNCTION          = 2,
  30 };
  31
  32 enum lttng_ust_abi_loglevel_type {
  33         LTTNG_UST_ABI_LOGLEVEL_ALL      = 0,
  34         LTTNG_UST_ABI_LOGLEVEL_RANGE    = 1,
  35         LTTNG_UST_ABI_LOGLEVEL_SINGLE   = 2,
  36 };
  37
  38 enum lttng_ust_abi_output {
  39         LTTNG_UST_ABI_MMAP              = 0,
  40 };
  41
  42 enum lttng_ust_abi_chan_type {
  43         LTTNG_UST_ABI_CHAN_PER_CPU = 0,
  44         LTTNG_UST_ABI_CHAN_METADATA = 1,
  45 };
  46
  47 struct lttng_ust_abi_tracer_version {
  48         uint32_t major;
  49         uint32_t minor;
  50         uint32_t patchlevel;
  51 } __attribute__((packed));
  52
  53 #define LTTNG_UST_ABI_CHANNEL_PADDING   (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
  54 /*
  55  * Given that the consumerd is limited to 64k file descriptors, we
  56  * cannot expect much more than 1MB channel structure size. This size is
  57  * depends on the number of streams within a channel, which depends on
  58  * the number of possible CPUs on the system.
  59  */
  60 #define LTTNG_UST_ABI_CHANNEL_DATA_MAX_LEN      1048576U
  61 struct lttng_ust_abi_channel {
  62         uint64_t len;
  63         int32_t type;   /* enum lttng_ust_abi_chan_type */
  64         char padding[LTTNG_UST_ABI_CHANNEL_PADDING];
  65         char data[];    /* variable sized data */
  66 } __attribute__((packed));
  67
  68 #define LTTNG_UST_ABI_STREAM_PADDING1   (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
  69 struct lttng_ust_abi_stream {
  70         uint64_t len;           /* shm len */
  71         uint32_t stream_nr;     /* stream number */
  72         char padding[LTTNG_UST_ABI_STREAM_PADDING1];
  73         /*
  74          * shm_fd and wakeup_fd are send over unix socket as file
  75          * descriptors after this structure.
  76          */
  77 } __attribute__((packed));
  78
  79 #define LTTNG_UST_ABI_COUNTER_DIMENSION_MAX 4
  80
  81 enum lttng_ust_abi_counter_arithmetic {
  82         LTTNG_UST_ABI_COUNTER_ARITHMETIC_MODULAR = 0,
  83         LTTNG_UST_ABI_COUNTER_ARITHMETIC_SATURATION = 1,
  84 };
  85
  86 enum lttng_ust_abi_counter_bitness {
  87         LTTNG_UST_ABI_COUNTER_BITNESS_32 = 0,
  88         LTTNG_UST_ABI_COUNTER_BITNESS_64 = 1,
  89 };
  90
  91 struct lttng_ust_abi_counter_dimension {
  92         uint64_t size;
  93         uint64_t underflow_index;
  94         uint64_t overflow_index;
  95         uint8_t has_underflow;
  96         uint8_t has_overflow;
  97 } __attribute__((packed));
  98
  99 #define LTTNG_UST_ABI_COUNTER_CONF_PADDING1 67
 100 struct lttng_ust_abi_counter_conf {
 101         uint32_t arithmetic;    /* enum lttng_ust_abi_counter_arithmetic */
 102         uint32_t bitness;       /* enum lttng_ust_abi_counter_bitness */
 103         uint32_t number_dimensions;
 104         int64_t global_sum_step;
 105         struct lttng_ust_abi_counter_dimension dimensions[LTTNG_UST_ABI_COUNTER_DIMENSION_MAX];
 106         uint8_t coalesce_hits;
 107         char padding[LTTNG_UST_ABI_COUNTER_CONF_PADDING1];
 108 } __attribute__((packed));
 109
 110 struct lttng_ust_abi_counter_value {
 111         uint32_t number_dimensions;
 112         uint64_t dimension_indexes[LTTNG_UST_ABI_COUNTER_DIMENSION_MAX];
 113         int64_t value;
 114 } __attribute__((packed));
 115
 116 #define LTTNG_UST_ABI_EVENT_PADDING1    8
 117 #define LTTNG_UST_ABI_EVENT_PADDING2    (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
 118 struct lttng_ust_abi_event {
 119         int32_t instrumentation;                /* enum lttng_ust_abi_instrumentation */
 120         char name[LTTNG_UST_ABI_SYM_NAME_LEN];  /* event name */
 121
 122         int32_t loglevel_type;                  /* enum lttng_ust_abi_loglevel_type */
 123         int32_t loglevel;                       /* value, -1: all */
 124         uint64_t token;                         /* User-provided token */
 125         char padding[LTTNG_UST_ABI_EVENT_PADDING1];
 126
 127         /* Per instrumentation type configuration */
 128         union {
 129                 char padding[LTTNG_UST_ABI_EVENT_PADDING2];
 130         } u;
 131 } __attribute__((packed));
 132
 133 #define LTTNG_UST_ABI_EVENT_NOTIFIER_PADDING    32
 134 struct lttng_ust_abi_event_notifier {
 135         struct lttng_ust_abi_event event;
 136         uint64_t error_counter_index;
 137         char padding[LTTNG_UST_ABI_EVENT_NOTIFIER_PADDING];
 138 } __attribute__((packed));
 139
 140 #define LTTNG_UST_ABI_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
 141 struct lttng_ust_abi_event_notifier_notification {
 142         uint64_t token;
 143         uint16_t capture_buf_size;
 144         char padding[LTTNG_UST_ABI_EVENT_NOTIFIER_NOTIFICATION_PADDING];
 145 } __attribute__((packed));
 146
 147 #define LTTNG_UST_ABI_COUNTER_PADDING1          (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
 148 #define LTTNG_UST_ABI_COUNTER_DATA_MAX_LEN      4096U
 149 struct lttng_ust_abi_counter {
 150         uint64_t len;
 151         char padding[LTTNG_UST_ABI_COUNTER_PADDING1];
 152         char data[];    /* variable sized data */
 153 } __attribute__((packed));
 154
 155 #define LTTNG_UST_ABI_COUNTER_GLOBAL_PADDING1   (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
 156 struct lttng_ust_abi_counter_global {
 157         uint64_t len;           /* shm len */
 158         char padding[LTTNG_UST_ABI_COUNTER_GLOBAL_PADDING1];
 159 } __attribute__((packed));
 160
 161 #define LTTNG_UST_ABI_COUNTER_CPU_PADDING1      (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
 162 struct lttng_ust_abi_counter_cpu {
 163         uint64_t len;           /* shm len */
 164         uint32_t cpu_nr;
 165         char padding[LTTNG_UST_ABI_COUNTER_CPU_PADDING1];
 166 } __attribute__((packed));
 167
 168 enum lttng_ust_abi_field_type {
 169         LTTNG_UST_ABI_FIELD_OTHER                       = 0,
 170         LTTNG_UST_ABI_FIELD_INTEGER                     = 1,
 171         LTTNG_UST_ABI_FIELD_ENUM                        = 2,
 172         LTTNG_UST_ABI_FIELD_FLOAT                       = 3,
 173         LTTNG_UST_ABI_FIELD_STRING                      = 4,
 174 };
 175
 176 #define LTTNG_UST_ABI_FIELD_ITER_PADDING        (LTTNG_UST_ABI_SYM_NAME_LEN + 28)
 177 struct lttng_ust_abi_field_iter {
 178         char event_name[LTTNG_UST_ABI_SYM_NAME_LEN];
 179         char field_name[LTTNG_UST_ABI_SYM_NAME_LEN];
 180         int32_t type;                           /* enum lttng_ust_abi_field_type */
 181         int loglevel;                           /* event loglevel */
 182         int nowrite;
 183         char padding[LTTNG_UST_ABI_FIELD_ITER_PADDING];
 184 } __attribute__((packed));
 185
 186 enum lttng_ust_abi_context_type {
 187         LTTNG_UST_ABI_CONTEXT_VTID                      = 0,
 188         LTTNG_UST_ABI_CONTEXT_VPID                      = 1,
 189         LTTNG_UST_ABI_CONTEXT_PTHREAD_ID                = 2,
 190         LTTNG_UST_ABI_CONTEXT_PROCNAME                  = 3,
 191         LTTNG_UST_ABI_CONTEXT_IP                        = 4,
 192         LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER       = 5,
 193         LTTNG_UST_ABI_CONTEXT_CPU_ID                    = 6,
 194         LTTNG_UST_ABI_CONTEXT_APP_CONTEXT               = 7,
 195         LTTNG_UST_ABI_CONTEXT_CGROUP_NS                 = 8,
 196         LTTNG_UST_ABI_CONTEXT_IPC_NS                    = 9,
 197         LTTNG_UST_ABI_CONTEXT_MNT_NS                    = 10,
 198         LTTNG_UST_ABI_CONTEXT_NET_NS                    = 11,
 199         LTTNG_UST_ABI_CONTEXT_PID_NS                    = 12,
 200         LTTNG_UST_ABI_CONTEXT_USER_NS                   = 13,
 201         LTTNG_UST_ABI_CONTEXT_UTS_NS                    = 14,
 202         LTTNG_UST_ABI_CONTEXT_VUID                      = 15,
 203         LTTNG_UST_ABI_CONTEXT_VEUID                     = 16,
 204         LTTNG_UST_ABI_CONTEXT_VSUID                     = 17,
 205         LTTNG_UST_ABI_CONTEXT_VGID                      = 18,
 206         LTTNG_UST_ABI_CONTEXT_VEGID                     = 19,
 207         LTTNG_UST_ABI_CONTEXT_VSGID                     = 20,
 208         LTTNG_UST_ABI_CONTEXT_TIME_NS                   = 21,
 209 };
 210
 211 struct lttng_ust_abi_perf_counter_ctx {
 212         uint32_t type;
 213         uint64_t config;
 214         char name[LTTNG_UST_ABI_SYM_NAME_LEN];
 215 } __attribute__((packed));
 216
 217 #define LTTNG_UST_ABI_CONTEXT_PADDING1  16
 218 #define LTTNG_UST_ABI_CONTEXT_PADDING2  (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
 219 struct lttng_ust_abi_context {
 220         int32_t ctx;     /* enum lttng_ust_abi_context_type */
 221         char padding[LTTNG_UST_ABI_CONTEXT_PADDING1];
 222
 223         union {
 224                 struct lttng_ust_abi_perf_counter_ctx perf_counter;
 225                 struct {
 226                         /* Includes trailing '\0'. */
 227                         uint32_t provider_name_len;
 228                         uint32_t ctx_name_len;
 229                 } app_ctx;
 230                 char padding[LTTNG_UST_ABI_CONTEXT_PADDING2];
 231         } u;
 232 } __attribute__((packed));
 233
 234 /*
 235  * Tracer channel attributes.
 236  */
 237 #define LTTNG_UST_ABI_CHANNEL_ATTR_PADDING      (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
 238 struct lttng_ust_abi_channel_attr {
 239         uint64_t subbuf_size;                   /* bytes */
 240         uint64_t num_subbuf;                    /* power of 2 */
 241         int overwrite;                          /* 1: overwrite, 0: discard */
 242         unsigned int switch_timer_interval;     /* usec */
 243         unsigned int read_timer_interval;       /* usec */
 244         int32_t output;                         /* enum lttng_ust_abi_output */
 245         union {
 246                 struct {
 247                         int64_t blocking_timeout;       /* Blocking timeout (usec) */
 248                 } s;
 249                 char padding[LTTNG_UST_ABI_CHANNEL_ATTR_PADDING];
 250         } u;
 251 } __attribute__((packed));
 252
 253 #define LTTNG_UST_ABI_TRACEPOINT_ITER_PADDING   16
 254 struct lttng_ust_abi_tracepoint_iter {
 255         char name[LTTNG_UST_ABI_SYM_NAME_LEN];  /* provider:name */
 256         int loglevel;
 257         char padding[LTTNG_UST_ABI_TRACEPOINT_ITER_PADDING];
 258 } __attribute__((packed));
 259
 260 enum lttng_ust_abi_object_type {
 261         LTTNG_UST_ABI_OBJECT_TYPE_UNKNOWN = -1,
 262         LTTNG_UST_ABI_OBJECT_TYPE_CHANNEL = 0,
 263         LTTNG_UST_ABI_OBJECT_TYPE_STREAM = 1,
 264         LTTNG_UST_ABI_OBJECT_TYPE_EVENT = 2,
 265         LTTNG_UST_ABI_OBJECT_TYPE_CONTEXT = 3,
 266         LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER_GROUP = 4,
 267         LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER = 5,
 268         LTTNG_UST_ABI_OBJECT_TYPE_COUNTER = 6,
 269         LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_GLOBAL = 7,
 270         LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_CPU = 8,
 271 };
 272
 273 #define LTTNG_UST_ABI_OBJECT_DATA_PADDING1      32
 274 #define LTTNG_UST_ABI_OBJECT_DATA_PADDING2      (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
 275
 276 struct lttng_ust_abi_object_data {
 277         int32_t type;   /* enum lttng_ust_abi_object_type */
 278         int handle;
 279         uint64_t size;
 280         char padding1[LTTNG_UST_ABI_OBJECT_DATA_PADDING1];
 281         union {
 282                 struct {
 283                         void *data;
 284                         int32_t type;   /* enum lttng_ust_abi_chan_type */
 285                         int wakeup_fd;
 286                 } channel;
 287                 struct {
 288                         int shm_fd;
 289                         int wakeup_fd;
 290                         uint32_t stream_nr;
 291                 } stream;
 292                 struct {
 293                         void *data;
 294                 } counter;
 295                 struct {
 296                         int shm_fd;
 297                 } counter_global;
 298                 struct {
 299                         int shm_fd;
 300                         uint32_t cpu_nr;
 301                 } counter_cpu;
 302                 char padding2[LTTNG_UST_ABI_OBJECT_DATA_PADDING2];
 303         } u;
 304 } __attribute__((packed));
 305
 306 enum lttng_ust_abi_calibrate_type {
 307         LTTNG_UST_ABI_CALIBRATE_TRACEPOINT,
 308 };
 309
 310 #define LTTNG_UST_ABI_CALIBRATE_PADDING1        16
 311 #define LTTNG_UST_ABI_CALIBRATE_PADDING2        (LTTNG_UST_ABI_SYM_NAME_LEN + 32)
 312 struct lttng_ust_abi_calibrate {
 313         enum lttng_ust_abi_calibrate_type type;         /* type (input) */
 314         char padding[LTTNG_UST_ABI_CALIBRATE_PADDING1];
 315
 316         union {
 317                 char padding[LTTNG_UST_ABI_CALIBRATE_PADDING2];
 318         } u;
 319 } __attribute__((packed));
 320
 321 #define LTTNG_UST_ABI_FILTER_BYTECODE_MAX_LEN   65536
 322 #define LTTNG_UST_ABI_FILTER_PADDING            32
 323 struct lttng_ust_abi_filter_bytecode {
 324         uint32_t len;
 325         uint32_t reloc_offset;
 326         uint64_t seqnum;
 327         char padding[LTTNG_UST_ABI_FILTER_PADDING];
 328         char data[0];
 329 } __attribute__((packed));
 330
 331 #define LTTNG_UST_ABI_CAPTURE_BYTECODE_MAX_LEN  65536
 332 #define LTTNG_UST_ABI_CAPTURE_PADDING           32
 333 struct lttng_ust_abi_capture_bytecode {
 334         uint32_t len;
 335         uint32_t reloc_offset;
 336         uint64_t seqnum;
 337         char padding[LTTNG_UST_ABI_CAPTURE_PADDING];
 338         char data[0];
 339 } __attribute__((packed));
 340
 341 #define LTTNG_UST_ABI_EXCLUSION_PADDING 32
 342 struct lttng_ust_abi_event_exclusion {
 343         uint32_t count;
 344         char padding[LTTNG_UST_ABI_EXCLUSION_PADDING];
 345         char names[LTTNG_UST_ABI_SYM_NAME_LEN][0];
 346 } __attribute__((packed));
 347
 348 #define LTTNG_UST_ABI_CMD(minor)                (minor)
 349 #define LTTNG_UST_ABI_CMDR(minor, type)         (minor)
 350 #define LTTNG_UST_ABI_CMDW(minor, type)         (minor)
 351
 352 /* Handled by object descriptor */
 353 #define LTTNG_UST_ABI_RELEASE                   LTTNG_UST_ABI_CMD(0x1)
 354
 355 /* Handled by object cmd */
 356
 357 /* LTTng-UST commands */
 358 #define LTTNG_UST_ABI_SESSION                   LTTNG_UST_ABI_CMD(0x40)
 359 #define LTTNG_UST_ABI_TRACER_VERSION            \
 360         LTTNG_UST_ABI_CMDR(0x41, struct lttng_ust_abi_tracer_version)
 361 #define LTTNG_UST_ABI_TRACEPOINT_LIST           LTTNG_UST_ABI_CMD(0x42)
 362 #define LTTNG_UST_ABI_WAIT_QUIESCENT            LTTNG_UST_ABI_CMD(0x43)
 363 #define LTTNG_UST_ABI_REGISTER_DONE             LTTNG_UST_ABI_CMD(0x44)
 364 #define LTTNG_UST_ABI_TRACEPOINT_FIELD_LIST     LTTNG_UST_ABI_CMD(0x45)
 365 #define LTTNG_UST_ABI_EVENT_NOTIFIER_GROUP_CREATE \
 366         LTTNG_UST_ABI_CMD(0x46)
 367
 368 /* Session commands */
 369 #define LTTNG_UST_ABI_CHANNEL                   \
 370         LTTNG_UST_ABI_CMDW(0x51, struct lttng_ust_abi_channel)
 371 #define LTTNG_UST_ABI_SESSION_START             LTTNG_UST_ABI_CMD(0x52)
 372 #define LTTNG_UST_ABI_SESSION_STOP              LTTNG_UST_ABI_CMD(0x53)
 373 #define LTTNG_UST_ABI_SESSION_STATEDUMP         LTTNG_UST_ABI_CMD(0x54)
 374
 375 /* Channel commands */
 376 #define LTTNG_UST_ABI_STREAM                    LTTNG_UST_ABI_CMD(0x60)
 377 #define LTTNG_UST_ABI_EVENT                     \
 378         LTTNG_UST_ABI_CMDW(0x61, struct lttng_ust_abi_event)
 379
 380 /* Event and channel commands */
 381 #define LTTNG_UST_ABI_CONTEXT                   \
 382         LTTNG_UST_ABI_CMDW(0x70, struct lttng_ust_abi_context)
 383 #define LTTNG_UST_ABI_FLUSH_BUFFER              \
 384         LTTNG_UST_ABI_CMD(0x71)
 385
 386 /* Event, event notifier, channel and session commands */
 387 #define LTTNG_UST_ABI_ENABLE                    LTTNG_UST_ABI_CMD(0x80)
 388 #define LTTNG_UST_ABI_DISABLE                   LTTNG_UST_ABI_CMD(0x81)
 389
 390 /* Tracepoint list commands */
 391 #define LTTNG_UST_ABI_TRACEPOINT_LIST_GET       LTTNG_UST_ABI_CMD(0x90)
 392 #define LTTNG_UST_ABI_TRACEPOINT_FIELD_LIST_GET LTTNG_UST_ABI_CMD(0x91)
 393
 394 /* Event and event notifier commands */
 395 #define LTTNG_UST_ABI_FILTER                    LTTNG_UST_ABI_CMD(0xA0)
 396 #define LTTNG_UST_ABI_EXCLUSION                 LTTNG_UST_ABI_CMD(0xA1)
 397
 398 /* Event notifier group commands */
 399 #define LTTNG_UST_ABI_EVENT_NOTIFIER_CREATE     \
 400         LTTNG_UST_ABI_CMDW(0xB0, struct lttng_ust_abi_event_notifier)
 401
 402 /* Event notifier commands */
 403 #define LTTNG_UST_ABI_CAPTURE                   LTTNG_UST_ABI_CMD(0xB6)
 404
 405 /* Session and event notifier group commands */
 406 #define LTTNG_UST_ABI_COUNTER                   \
 407         LTTNG_UST_ABI_CMDW(0xC0, struct lttng_ust_abi_counter)
 408
 409 /* Counter commands */
 410 #define LTTNG_UST_ABI_COUNTER_GLOBAL            \
 411         LTTNG_UST_ABI_CMDW(0xD0, struct lttng_ust_abi_counter_global)
 412 #define LTTNG_UST_ABI_COUNTER_CPU               \
 413         LTTNG_UST_ABI_CMDW(0xD1, struct lttng_ust_abi_counter_cpu)
 414
 415 #define LTTNG_UST_ABI_ROOT_HANDLE       0
 416
 417 #endif /* _LTTNG_UST_ABI_H */