include/lttng/events-internal.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * lttng/events-internal.h
   4  *
   5  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  */
   7
   8 #ifndef _LTTNG_EVENTS_INTERNAL_H
   9 #define _LTTNG_EVENTS_INTERNAL_H
  10
  11 #include <lttng/events.h>
  12
  13 enum lttng_enabler_format_type {
  14         LTTNG_ENABLER_FORMAT_STAR_GLOB,
  15         LTTNG_ENABLER_FORMAT_NAME,
  16 };
  17
  18 /*
  19  * Objects in a linked-list of enablers, owned by an event.
  20  */
  21 struct lttng_enabler_ref {
  22         struct list_head node;                  /* enabler ref list */
  23         struct lttng_enabler *ref;              /* backward ref */
  24 };
  25
  26 struct lttng_krp;                               /* Kretprobe handling */
  27
  28 struct lttng_uprobe_handler {
  29         struct lttng_kernel_event_common *event;
  30         loff_t offset;
  31         struct uprobe_consumer up_consumer;
  32         struct list_head node;
  33 };
  34
  35 struct lttng_kprobe {
  36         struct kprobe kp;
  37         char *symbol_name;
  38 };
  39
  40 struct lttng_uprobe {
  41         struct inode *inode;
  42         struct list_head head;
  43 };
  44
  45 enum lttng_syscall_entryexit {
  46         LTTNG_SYSCALL_ENTRY,
  47         LTTNG_SYSCALL_EXIT,
  48 };
  49
  50 enum lttng_syscall_abi {
  51         LTTNG_SYSCALL_ABI_NATIVE,
  52         LTTNG_SYSCALL_ABI_COMPAT,
  53 };
  54
  55 struct lttng_kernel_event_common_private {
  56         struct lttng_kernel_event_common *pub;          /* Public event interface */
  57
  58         const struct lttng_kernel_event_desc *desc;
  59         /* Backward references: list of lttng_enabler_ref (ref to enablers) */
  60         struct list_head enablers_ref_head;
  61         int registered;                                 /* has reg'd tracepoint probe */
  62         uint64_t user_token;
  63
  64         int has_enablers_without_filter_bytecode;
  65         /* list of struct lttng_kernel_bytecode_runtime, sorted by seqnum */
  66         struct list_head filter_bytecode_runtime_head;
  67         enum lttng_kernel_abi_instrumentation instrumentation;
  68         /* Selected by instrumentation */
  69         union {
  70                 struct lttng_kprobe kprobe;
  71                 struct lttng_uprobe uprobe;
  72                 struct {
  73                         struct lttng_krp *lttng_krp;
  74                         char *symbol_name;
  75                 } kretprobe;
  76                 struct {
  77                         enum lttng_syscall_entryexit entryexit;
  78                         enum lttng_syscall_abi abi;
  79                         struct hlist_node node;                 /* chain registered syscall event_notifier */
  80                         unsigned int syscall_id;
  81                 } syscall;
  82         } u;
  83 };
  84
  85 struct lttng_kernel_event_recorder_private {
  86         struct lttng_kernel_event_common_private parent;
  87
  88         struct lttng_kernel_event_recorder *pub;        /* Public event interface */
  89         struct list_head node;                          /* Event recorder list */
  90         struct hlist_node hlist;                        /* Hash table of event recorders */
  91         struct lttng_kernel_ctx *ctx;
  92         unsigned int id;
  93         unsigned int metadata_dumped:1;
  94 };
  95
  96 struct lttng_kernel_event_notifier_private {
  97         struct lttng_kernel_event_common_private parent;
  98
  99         struct lttng_kernel_event_notifier *pub;        /* Public event notifier interface */
 100         struct lttng_event_notifier_group *group;       /* weak ref */
 101         size_t num_captures;                            /* Needed to allocate the msgpack array. */
 102         uint64_t error_counter_index;
 103         struct list_head node;                          /* Event notifier list */
 104         struct hlist_node hlist;                        /* Hash table of event notifiers */
 105         struct list_head capture_bytecode_runtime_head;
 106
 107 };
 108
 109 enum lttng_kernel_bytecode_interpreter_ret {
 110         LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1,
 111         LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0,
 112 };
 113
 114 enum lttng_kernel_bytecode_filter_result {
 115         LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0,
 116         LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1,
 117 };
 118
 119 struct lttng_kernel_bytecode_filter_ctx {
 120         enum lttng_kernel_bytecode_filter_result result;
 121 };
 122
 123 struct lttng_interpreter_output;
 124
 125 enum lttng_kernel_bytecode_type {
 126         LTTNG_KERNEL_BYTECODE_TYPE_FILTER,
 127         LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE,
 128 };
 129
 130 struct lttng_kernel_bytecode_node {
 131         enum lttng_kernel_bytecode_type type;
 132         struct list_head node;
 133         struct lttng_enabler *enabler;
 134         struct {
 135                 uint32_t len;
 136                 uint32_t reloc_offset;
 137                 uint64_t seqnum;
 138                 char data[];
 139         } bc;
 140 };
 141
 142 struct lttng_kernel_bytecode_runtime {
 143         /* Associated bytecode */
 144         enum lttng_kernel_bytecode_type type;
 145         struct lttng_kernel_bytecode_node *bc;
 146         int (*interpreter_func)(struct lttng_kernel_bytecode_runtime *kernel_bytecode,
 147                                 const char *interpreter_stack_data,
 148                                 struct lttng_kernel_probe_ctx *lttng_probe_ctx,
 149                                 void *caller_ctx);
 150         int link_failed;
 151         struct list_head node;  /* list of bytecode runtime in event */
 152         struct lttng_kernel_ctx *ctx;
 153 };
 154
 155 /*
 156  * Enabler field, within whatever object is enabling an event. Target of
 157  * backward reference.
 158  */
 159 struct lttng_enabler {
 160         enum lttng_enabler_format_type format_type;
 161
 162         /* head list of struct lttng_kernel_bytecode_node */
 163         struct list_head filter_bytecode_head;
 164
 165         struct lttng_kernel_abi_event event_param;
 166         unsigned int enabled:1;
 167
 168         uint64_t user_token;            /* User-provided token. */
 169 };
 170
 171 struct lttng_event_enabler {
 172         struct lttng_enabler base;
 173         struct list_head node;  /* per-session list of enablers */
 174         struct lttng_channel *chan;
 175 };
 176
 177 struct lttng_event_notifier_enabler {
 178         struct lttng_enabler base;
 179         uint64_t error_counter_index;
 180         struct list_head node;  /* List of event_notifier enablers */
 181         struct lttng_event_notifier_group *group;
 182
 183         /* head list of struct lttng_kernel_bytecode_node */
 184         struct list_head capture_bytecode_head;
 185         uint64_t num_captures;
 186 };
 187
 188 struct lttng_ctx_value {
 189         union {
 190                 int64_t s64;
 191                 const char *str;
 192                 double d;
 193         } u;
 194 };
 195
 196 /*
 197  * We need to keep this perf counter field separately from struct
 198  * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
 199  */
 200 struct lttng_perf_counter_field {
 201 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
 202         struct lttng_cpuhp_node cpuhp_prepare;
 203         struct lttng_cpuhp_node cpuhp_online;
 204 #else
 205         struct notifier_block nb;
 206         int hp_enable;
 207 #endif
 208         struct perf_event_attr *attr;
 209         struct perf_event **e;  /* per-cpu array */
 210         char *name;
 211         struct lttng_kernel_event_field *event_field;
 212 };
 213
 214 struct lttng_kernel_ctx_field {
 215         const struct lttng_kernel_event_field *event_field;
 216         size_t (*get_size)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
 217                         size_t offset);
 218         void (*record)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
 219                         struct lib_ring_buffer_ctx *ctx,
 220                         struct lttng_channel *chan);
 221         void (*get_value)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
 222                         struct lttng_ctx_value *value);
 223         void (*destroy)(void *priv);
 224         void *priv;
 225 };
 226
 227 struct lttng_kernel_ctx {
 228         struct lttng_kernel_ctx_field *fields;
 229         unsigned int nr_fields;
 230         unsigned int allocated_fields;
 231         size_t largest_align;   /* in bytes */
 232 };
 233
 234 extern struct lttng_kernel_ctx *lttng_static_ctx;
 235
 236 static inline
 237 const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type)
 238 {
 239         if (type->type != lttng_kernel_type_integer)
 240                 return NULL;
 241         return container_of(type, const struct lttng_kernel_type_integer, parent);
 242 }
 243
 244 static inline
 245 const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type)
 246 {
 247         if (type->type != lttng_kernel_type_string)
 248                 return NULL;
 249         return container_of(type, const struct lttng_kernel_type_string, parent);
 250 }
 251
 252 static inline
 253 const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type)
 254 {
 255         if (type->type != lttng_kernel_type_enum)
 256                 return NULL;
 257         return container_of(type, const struct lttng_kernel_type_enum, parent);
 258 }
 259
 260 static inline
 261 const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type)
 262 {
 263         if (type->type != lttng_kernel_type_array)
 264                 return NULL;
 265         return container_of(type, const struct lttng_kernel_type_array, parent);
 266 }
 267
 268 static inline
 269 const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type)
 270 {
 271         if (type->type != lttng_kernel_type_sequence)
 272                 return NULL;
 273         return container_of(type, const struct lttng_kernel_type_sequence, parent);
 274 }
 275
 276 static inline
 277 const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type)
 278 {
 279         if (type->type != lttng_kernel_type_struct)
 280                 return NULL;
 281         return container_of(type, const struct lttng_kernel_type_struct, parent);
 282 }
 283
 284 static inline
 285 const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type)
 286 {
 287         if (type->type != lttng_kernel_type_variant)
 288                 return NULL;
 289         return container_of(type, const struct lttng_kernel_type_variant, parent);
 290 }
 291
 292 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type)
 293 {
 294         const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type);
 295
 296         if (!type_integer)
 297                 return false;
 298         switch (type_integer->size) {
 299         case 8:         /* Fall-through. */
 300         case 16:        /* Fall-through. */
 301         case 32:        /* Fall-through. */
 302         case 64:
 303                 break;
 304         default:
 305                 return false;
 306         }
 307         return true;
 308 }
 309
 310 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event,
 311                 const char *interpreter_stack_data,
 312                 struct lttng_kernel_probe_ctx *probe_ctx,
 313                 void *event_filter_ctx);
 314
 315 static inline
 316 struct lttng_enabler *lttng_event_enabler_as_enabler(
 317                 struct lttng_event_enabler *event_enabler)
 318 {
 319         return &event_enabler->base;
 320 }
 321
 322 static inline
 323 struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
 324                 struct lttng_event_notifier_enabler *event_notifier_enabler)
 325 {
 326         return &event_notifier_enabler->base;
 327 }
 328
 329 int lttng_context_init(void);
 330 void lttng_context_exit(void);
 331 int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p,
 332                 const struct lttng_kernel_ctx_field *f);
 333 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p);
 334 struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx,
 335                 size_t index);
 336 int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name);
 337 int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name);
 338 void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx);
 339 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx);
 340 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx);
 341 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx);
 342 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx);
 343 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx);
 344 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx);
 345 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx);
 346 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx);
 347 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx);
 348 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx);
 349 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx);
 350 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx);
 351 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx);
 352 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
 353 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx);
 354 #else
 355 static inline
 356 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx)
 357 {
 358         return -ENOSYS;
 359 }
 360 #endif
 361 #ifdef CONFIG_PREEMPT_RT_FULL
 362 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx);
 363 #else
 364 static inline
 365 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx)
 366 {
 367         return -ENOSYS;
 368 }
 369 #endif
 370
 371 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type);
 372
 373 #if defined(CONFIG_CGROUPS) && \
 374         ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
 375          LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
 376 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 377 #else
 378 static inline
 379 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 380 {
 381         return -ENOSYS;
 382 }
 383 #endif
 384
 385 #if defined(CONFIG_IPC_NS) && \
 386         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 387 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 388 #else
 389 static inline
 390 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 391 {
 392         return -ENOSYS;
 393 }
 394 #endif
 395
 396 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
 397         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 398 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 399 #else
 400 static inline
 401 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 402 {
 403         return -ENOSYS;
 404 }
 405 #endif
 406
 407 #if defined(CONFIG_NET_NS) && \
 408         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 409 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 410 #else
 411 static inline
 412 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 413 {
 414         return -ENOSYS;
 415 }
 416 #endif
 417
 418 #if defined(CONFIG_PID_NS) && \
 419         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 420 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 421 #else
 422 static inline
 423 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 424 {
 425         return -ENOSYS;
 426 }
 427 #endif
 428
 429 #if defined(CONFIG_USER_NS) && \
 430         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 431 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 432 #else
 433 static inline
 434 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 435 {
 436         return -ENOSYS;
 437 }
 438 #endif
 439
 440 #if defined(CONFIG_UTS_NS) && \
 441         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 442 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 443 #else
 444 static inline
 445 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 446 {
 447         return -ENOSYS;
 448 }
 449 #endif
 450
 451 #if defined(CONFIG_TIME_NS) && \
 452         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
 453 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 454 #else
 455 static inline
 456 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 457 {
 458         return -ENOSYS;
 459 }
 460 #endif
 461
 462 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx);
 463 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx);
 464 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx);
 465 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx);
 466 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx);
 467 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx);
 468 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx);
 469 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx);
 470 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx);
 471 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx);
 472 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx);
 473 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx);
 474
 475 #if defined(CONFIG_PERF_EVENTS)
 476 int lttng_add_perf_counter_to_ctx(uint32_t type,
 477                                   uint64_t config,
 478                                   const char *name,
 479                                   struct lttng_kernel_ctx **ctx);
 480 int lttng_cpuhp_perf_counter_online(unsigned int cpu,
 481                 struct lttng_cpuhp_node *node);
 482 int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
 483                 struct lttng_cpuhp_node *node);
 484 #else
 485 static inline
 486 int lttng_add_perf_counter_to_ctx(uint32_t type,
 487                                   uint64_t config,
 488                                   const char *name,
 489                                   struct lttng_kernel_ctx **ctx)
 490 {
 491         return -ENOSYS;
 492 }
 493 static inline
 494 int lttng_cpuhp_perf_counter_online(unsigned int cpu,
 495                 struct lttng_cpuhp_node *node)
 496 {
 497         return 0;
 498 }
 499 static inline
 500 int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
 501                 struct lttng_cpuhp_node *node)
 502 {
 503         return 0;
 504 }
 505 #endif
 506
 507 struct lttng_event_enabler *lttng_event_enabler_create(
 508                 enum lttng_enabler_format_type format_type,
 509                 struct lttng_kernel_abi_event *event_param,
 510                 struct lttng_channel *chan);
 511
 512 int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler);
 513 int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler);
 514 struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
 515                 struct lttng_event_notifier_group *event_notifier_group,
 516                 enum lttng_enabler_format_type format_type,
 517                 struct lttng_kernel_abi_event_notifier *event_notifier_param);
 518
 519 int lttng_event_notifier_enabler_enable(
 520                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 521 int lttng_event_notifier_enabler_disable(
 522                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 523
 524 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler,
 525                 struct lttng_kernel_abi_filter_bytecode __user *bytecode);
 526 int lttng_event_notifier_enabler_attach_filter_bytecode(
 527                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 528                 struct lttng_kernel_abi_filter_bytecode __user *bytecode);
 529 int lttng_event_notifier_enabler_attach_capture_bytecode(
 530                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 531                 struct lttng_kernel_abi_capture_bytecode __user *bytecode);
 532
 533 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc,
 534                 struct lttng_enabler *enabler);
 535
 536 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc,
 537                 struct lttng_kernel_ctx *ctx,
 538                 struct list_head *instance_bytecode_runtime_head,
 539                 struct list_head *enabler_bytecode_runtime_head);
 540
 541 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
 542 int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler);
 543 int lttng_syscalls_unregister_channel(struct lttng_channel *chan);
 544 int lttng_syscalls_destroy_event(struct lttng_channel *chan);
 545 int lttng_syscall_filter_enable_event(
 546                 struct lttng_channel *chan,
 547                 struct lttng_kernel_event_recorder *event);
 548 int lttng_syscall_filter_disable_event(
 549                 struct lttng_channel *chan,
 550                 struct lttng_kernel_event_recorder *event);
 551
 552 long lttng_channel_syscall_mask(struct lttng_channel *channel,
 553                 struct lttng_kernel_abi_syscall_mask __user *usyscall_mask);
 554
 555 int lttng_syscalls_register_event_notifier(
 556                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 557 int lttng_syscalls_create_matching_event_notifiers(
 558                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 559 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group *group);
 560 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 561 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 562 #else
 563 static inline int lttng_syscalls_register_event(
 564                 struct lttng_event_enabler *event_enabler)
 565 {
 566         return -ENOSYS;
 567 }
 568
 569 static inline int lttng_syscalls_unregister_channel(struct lttng_channel *chan)
 570 {
 571         return 0;
 572 }
 573
 574 static inline int lttng_syscalls_destroy(struct lttng_channel *chan)
 575 {
 576         return 0;
 577 }
 578
 579 static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan,
 580                 struct lttng_kernel_event_recorder *event);
 581 {
 582         return -ENOSYS;
 583 }
 584
 585 static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan,
 586                 struct lttng_kernel_event_recorder *event);
 587 {
 588         return -ENOSYS;
 589 }
 590
 591 static inline long lttng_channel_syscall_mask(struct lttng_channel *channel,
 592                 struct lttng_kernel_syscall_mask __user *usyscall_mask)
 593 {
 594         return -ENOSYS;
 595 }
 596
 597 static inline int lttng_syscalls_register_event_notifier(
 598                 struct lttng_event_notifier_group *group)
 599 {
 600         return -ENOSYS;
 601 }
 602
 603 static inline int lttng_syscalls_unregister_event_notifier_group(
 604                 struct lttng_event_notifier_group *group)
 605 {
 606         return 0;
 607 }
 608
 609 static inline int lttng_syscall_filter_enable_event_notifier(
 610                 struct lttng_event_notifier_group *group,
 611                 const char *name)
 612 {
 613         return -ENOSYS;
 614 }
 615
 616 static inline int lttng_syscall_filter_disable_event_notifier(
 617                 struct lttng_event_notifier_group *group,
 618                 const char *name)
 619 {
 620         return -ENOSYS;
 621 }
 622
 623 #endif
 624
 625 #ifdef CONFIG_KPROBES
 626 int lttng_kprobes_register_event(const char *name,
 627                 const char *symbol_name,
 628                 uint64_t offset,
 629                 uint64_t addr,
 630                 struct lttng_kernel_event_recorder *event);
 631 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event);
 632 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
 633 int lttng_kprobes_register_event_notifier(const char *symbol_name,
 634                 uint64_t offset,
 635                 uint64_t addr,
 636                 struct lttng_kernel_event_notifier *event_notifier);
 637 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 638 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
 639 #else
 640 static inline
 641 int lttng_kprobes_register_event(const char *name,
 642                 const char *symbol_name,
 643                 uint64_t offset,
 644                 uint64_t addr,
 645                 struct lttng_kernel_event_recorder *event)
 646 {
 647         return -ENOSYS;
 648 }
 649
 650 static inline
 651 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event)
 652 {
 653 }
 654
 655 static inline
 656 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
 657 {
 658 }
 659
 660 static inline
 661 int lttng_kprobes_register_event_notifier(const char *symbol_name,
 662                 uint64_t offset,
 663                 uint64_t addr,
 664                 struct lttng_kernel_event_notifier *event_notifier)
 665 {
 666         return -ENOSYS;
 667 }
 668
 669 static inline
 670 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
 671 {
 672 }
 673
 674 static inline
 675 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
 676 {
 677 }
 678 #endif
 679
 680 int lttng_event_add_callsite(struct lttng_kernel_event_common *event,
 681         struct lttng_kernel_abi_event_callsite __user *callsite);
 682
 683 #ifdef CONFIG_UPROBES
 684 int lttng_uprobes_register_event(const char *name,
 685         int fd, struct lttng_kernel_event_recorder *event);
 686 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
 687         struct lttng_kernel_abi_event_callsite __user *callsite);
 688 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event);
 689 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
 690 int lttng_uprobes_register_event_notifier(const char *name,
 691         int fd, struct lttng_kernel_event_notifier *event_notifier);
 692 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 693 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
 694 #else
 695 static inline
 696 int lttng_uprobes_register_event(const char *name,
 697         int fd, struct lttng_kernel_event_recorder *event)
 698 {
 699         return -ENOSYS;
 700 }
 701
 702 static inline
 703 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
 704         struct lttng_kernel_abi_event_callsite __user *callsite)
 705 {
 706         return -ENOSYS;
 707 }
 708
 709 static inline
 710 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event)
 711 {
 712 }
 713
 714 static inline
 715 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
 716 {
 717 }
 718
 719 static inline
 720 int lttng_uprobes_register_event_notifier(const char *name,
 721         int fd, struct lttng_kernel_event_notifier *event_notifier)
 722 {
 723         return -ENOSYS;
 724 }
 725
 726 static inline
 727 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
 728 {
 729 }
 730
 731 static inline
 732 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
 733 {
 734 }
 735 #endif
 736
 737 #ifdef CONFIG_KRETPROBES
 738 int lttng_kretprobes_register(const char *name,
 739                 const char *symbol_name,
 740                 uint64_t offset,
 741                 uint64_t addr,
 742                 struct lttng_kernel_event_recorder *event_entry,
 743                 struct lttng_kernel_event_recorder *event_exit);
 744 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event);
 745 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event);
 746 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
 747         int enable);
 748 #else
 749 static inline
 750 int lttng_kretprobes_register(const char *name,
 751                 const char *symbol_name,
 752                 uint64_t offset,
 753                 uint64_t addr,
 754                 struct lttng_kernel_event_recorder *event_entry,
 755                 struct lttng_kernel_event_recorder *event_exit)
 756 {
 757         return -ENOSYS;
 758 }
 759
 760 static inline
 761 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event)
 762 {
 763 }
 764
 765 static inline
 766 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event)
 767 {
 768 }
 769
 770 static inline
 771 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
 772         int enable)
 773 {
 774         return -ENOSYS;
 775 }
 776 #endif
 777
 778 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv)    \
 779         __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, {                                 \
 780                 .event_field = (_event_field),                                                          \
 781                 .get_size = (_get_size),                                                                \
 782                 .record = (_record),                                                                    \
 783                 .get_value = (_get_value),                                                              \
 784                 .destroy = (_destroy),                                                                  \
 785                 .priv = (_priv),                                                                        \
 786         })
 787
 788 #endif /* _LTTNG_EVENTS_INTERNAL_H */