sessiond: Implement kernel event notifier error counter

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

diff --git a/src/common/lttng-kernel.h b/src/common/lttng-kernel.h
index e8647f439fcdd0dc7c638899504b8978179a750f..aeab89d98affaa2ab8e4b26d178335a37856c517 100644 (file)
--- a/src/common/lttng-kernel.h
+++ b/src/common/lttng-kernel.h
@@ -178,12 +178,76 @@ 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_COUNTER_DIMENSION_MAX      4
+
+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_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
 struct lttng_kernel_event_notifier_notification {
        uint64_t token;