SoW-2020-0002: Trace Hit Counters

[lttng-tools.git] / src / common / lttng-kernel.h

diff --git a/src/common/lttng-kernel.h b/src/common/lttng-kernel.h
index cd343bb766c81ea39f7f2ae8dbcd6de058954679..343d68dab2735e39acf2135183cfa550d007961d 100644 (file)
--- a/src/common/lttng-kernel.h
+++ b/src/common/lttng-kernel.h
@@ -178,18 +178,140 @@ struct lttng_kernel_event {
        } u;
 } LTTNG_PACKED;
 
-#define LTTNG_KERNEL_EVENT_NOTIFIER_PADDING    40
+#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;
 
-#define LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING 34
+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;
+
 struct lttng_kernel_tracer_version {
        uint32_t major;
        uint32_t minor;