+#define LTTNG_KERNEL_EVENT_NOTIFIER_PADDING 32
+struct lttng_kernel_event_notifier {
+ struct lttng_kernel_event event;
+ uint64_t error_counter_idx;
+
+ char padding[LTTNG_KERNEL_EVENT_NOTIFIER_PADDING];
+} LTTNG_PACKED;
+
+enum lttng_kernel_key_token_type {
+ LTTNG_KERNEL_KEY_TOKEN_STRING = 0, /* arg: strtab_offset. */
+ LTTNG_KERNEL_KEY_TOKEN_EVENT_NAME = 1, /* no arg. */
+};
+
+#define LTTNG_KERNEL_KEY_ARG_PADDING1 60
+#define LTTNG_KERNEL_KEY_TOKEN_STRING_LEN_MAX 256
+struct lttng_kernel_key_token {
+ uint32_t type; /* enum lttng_kernel_key_token_type */
+ union {
+ uint64_t string_ptr;
+ char padding[LTTNG_KERNEL_KEY_ARG_PADDING1];
+ } arg;
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_NR_KEY_TOKEN 4
+struct lttng_kernel_counter_key_dimension {
+ uint32_t nr_key_tokens;
+ struct lttng_kernel_key_token key_tokens[LTTNG_KERNEL_NR_KEY_TOKEN];
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_COUNTER_DIMENSION_MAX 4
+struct lttng_kernel_counter_key {
+ uint32_t nr_dimensions;
+ struct lttng_kernel_counter_key_dimension key_dimensions[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_COUNTER_EVENT_PADDING1 16
+struct lttng_kernel_counter_event {
+ struct lttng_kernel_event event;
+ struct lttng_kernel_counter_key key;
+ char padding[LTTNG_KERNEL_COUNTER_EVENT_PADDING1];
+} LTTNG_PACKED;
+
+enum lttng_kernel_counter_arithmetic {
+ LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR = 0,
+};
+
+enum lttng_kernel_counter_bitness {
+ LTTNG_KERNEL_COUNTER_BITNESS_32 = 0,
+ LTTNG_KERNEL_COUNTER_BITNESS_64 = 1,
+};
+
+struct lttng_kernel_counter_dimension {
+ uint64_t size;
+ uint64_t underflow_index;
+ uint64_t overflow_index;
+ uint8_t has_underflow;
+ uint8_t has_overflow;
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_COUNTER_CONF_PADDING1 67
+struct lttng_kernel_counter_conf {
+ uint32_t arithmetic; /* enum lttng_kernel_counter_arithmetic */
+ uint32_t bitness; /* enum lttng_kernel_counter_bitness */
+ uint32_t number_dimensions;
+ int64_t global_sum_step;
+ struct lttng_kernel_counter_dimension dimensions[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
+ uint8_t coalesce_hits;
+ char padding[LTTNG_KERNEL_COUNTER_CONF_PADDING1];
+} LTTNG_PACKED;
+
+struct lttng_kernel_counter_index {
+ uint32_t number_dimensions;
+ uint64_t dimension_indexes[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
+} LTTNG_PACKED;
+
+struct lttng_kernel_counter_value {
+ int64_t value;
+ uint8_t underflow;
+ uint8_t overflow;
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_COUNTER_READ_PADDING 32
+struct lttng_kernel_counter_read {
+ struct lttng_kernel_counter_index index;
+ int32_t cpu; /* -1 for global counter, >= 0 for specific cpu. */
+ struct lttng_kernel_counter_value value; /* output */
+ char padding[LTTNG_KERNEL_COUNTER_READ_PADDING];
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_COUNTER_AGGREGATE_PADDING 32
+struct lttng_kernel_counter_aggregate {
+ struct lttng_kernel_counter_index index;
+ struct lttng_kernel_counter_value value; /* output */
+ char padding[LTTNG_KERNEL_COUNTER_AGGREGATE_PADDING];
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_COUNTER_CLEAR_PADDING 32
+struct lttng_kernel_counter_clear {
+ struct lttng_kernel_counter_index index;
+ char padding[LTTNG_KERNEL_COUNTER_CLEAR_PADDING];
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_COUNTER_MAP_NR_DESCRIPTORS_PADDING 32
+struct lttng_kernel_counter_map_nr_descriptors {
+ uint64_t nr_descriptors;
+};
+
+#define LTTNG_KERNEL_COUNTER_KEY_LEN 256
+#define LTTNG_KERNEL_COUNTER_MAP_DESCRIPTOR_PADDING 32
+struct lttng_kernel_counter_map_descriptor {
+ uint64_t descriptor_index; /* input. [ 0 .. nr_descriptors - 1 ] */
+ uint32_t dimension; /* outputs */
+ uint64_t array_index;
+ uint64_t user_token;
+ char key[LTTNG_KERNEL_COUNTER_KEY_LEN];
+
+ char padding[LTTNG_KERNEL_COUNTER_MAP_DESCRIPTOR_PADDING];
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
+struct lttng_kernel_event_notifier_notification {
+ uint64_t token;
+ uint16_t capture_buf_size;
+ char padding[LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING];
+} LTTNG_PACKED;
+
+#define LTTNG_KERNEL_CAPTURE_BYTECODE_MAX_LEN 65536
+struct lttng_kernel_capture_bytecode {
+ uint32_t len;
+ uint32_t reloc_offset;
+ uint64_t seqnum;
+ char data[0];
+} LTTNG_PACKED;
+