Implement libcounter

[lttng-ust.git] / include / lttng / ust-abi.h

diff --git a/include/lttng/ust-abi.h b/include/lttng/ust-abi.h
index 1c80c14408937a3f14e89c1f1125efb4c2b4edd1..6a6144f789b41505d6608a1a1b586cda870a3aa4 100644 (file)
--- a/include/lttng/ust-abi.h
+++ b/include/lttng/ust-abi.h
@@ -103,6 +103,40 @@ struct lttng_ust_stream {
         */
 } LTTNG_PACKED;
 
+
+enum lttng_ust_counter_arithmetic {
+    LTTNG_UST_COUNTER_ARITHMETIC_MODULAR = 0,
+    LTTNG_UST_COUNTER_ARITHMETIC_SATURATION = 1,
+};
+
+enum lttng_ust_counter_bitness {
+    LTTNG_UST_COUNTER_BITNESS_32BITS = 4,
+    LTTNG_UST_COUNTER_BITNESS_64BITS = 8,
+};
+
+struct lttng_ust_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_UST_COUNTER_DIMENSION_MAX 8
+struct lttng_ust_counter_conf {
+       uint32_t arithmetic;    /* enum lttng_ust_counter_arithmetic */
+       uint32_t bitness;       /* enum lttng_ust_counter_bitness */
+       uint32_t number_dimensions;
+       int64_t global_sum_step;
+       struct lttng_ust_counter_dimension dimensions[LTTNG_UST_COUNTER_DIMENSION_MAX];
+} LTTNG_PACKED;
+
+struct lttng_ust_counter_value {
+       uint32_t number_dimensions;
+       uint64_t dimension_indexes[LTTNG_UST_COUNTER_DIMENSION_MAX];
+       int64_t value;
+} LTTNG_PACKED;
+
 #define LTTNG_UST_EVENT_PADDING1       8
 #define LTTNG_UST_EVENT_PADDING2       (LTTNG_UST_SYM_NAME_LEN + 32)
 struct lttng_ust_event {
@@ -123,6 +157,7 @@ struct lttng_ust_event {
 #define LTTNG_UST_EVENT_NOTIFIER_PADDING1      16
 struct lttng_ust_event_notifier {
        struct lttng_ust_event event;
+       uint64_t error_counter_index;
        char padding[LTTNG_UST_EVENT_NOTIFIER_PADDING1];
 } LTTNG_PACKED;
 
@@ -133,6 +168,27 @@ struct lttng_ust_event_notifier_notification {
        char padding[LTTNG_EVENT_NOTIFIER_NOTIFICATION_PADDING];
 } LTTNG_PACKED;
 
+#define LTTNG_UST_COUNTER_PADDING1     (LTTNG_UST_SYM_NAME_LEN + 32)
+#define LTTNG_UST_COUNTER_DATA_MAX_LEN 4096U
+struct lttng_ust_counter {
+       uint64_t len;
+       char padding[LTTNG_UST_COUNTER_PADDING1];
+       char data[];    /* variable sized data */
+} LTTNG_PACKED;
+
+#define LTTNG_UST_COUNTER_GLOBAL_PADDING1      (LTTNG_UST_SYM_NAME_LEN + 32)
+struct lttng_ust_counter_global {
+       uint64_t len;           /* shm len */
+       char padding[LTTNG_UST_COUNTER_GLOBAL_PADDING1];
+} LTTNG_PACKED;
+
+#define LTTNG_UST_COUNTER_CPU_PADDING1 (LTTNG_UST_SYM_NAME_LEN + 32)
+struct lttng_ust_counter_cpu {
+       uint64_t len;           /* shm len */
+       uint32_t cpu_nr;
+       char padding[LTTNG_UST_COUNTER_CPU_PADDING1];
+} LTTNG_PACKED;
+
 enum lttng_ust_field_type {
        LTTNG_UST_FIELD_OTHER                   = 0,
        LTTNG_UST_FIELD_INTEGER                 = 1,
@@ -233,6 +289,9 @@ enum lttng_ust_object_type {
        LTTNG_UST_OBJECT_TYPE_CONTEXT = 3,
        LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP = 4,
        LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER = 5,
+       LTTNG_UST_OBJECT_TYPE_COUNTER = 6,
+       LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL = 7,
+       LTTNG_UST_OBJECT_TYPE_COUNTER_CPU = 8,
 };
 
 #define LTTNG_UST_OBJECT_DATA_PADDING1 32
@@ -254,6 +313,16 @@ struct lttng_ust_object_data {
                        int wakeup_fd;
                        uint32_t stream_nr;
                } stream;
+               struct {
+                       void *data;
+               } counter;
+               struct {
+                       int shm_fd;
+               } counter_global;
+               struct {
+                       int shm_fd;
+                       uint32_t cpu_nr;
+               } counter_cpu;
                char padding2[LTTNG_UST_OBJECT_DATA_PADDING2];
        } u;
 } LTTNG_PACKED;
@@ -354,6 +423,16 @@ struct lttng_ust_event_exclusion {
        _UST_CMDW(0xB0, struct lttng_ust_event_notifier)
 #define LTTNG_UST_CAPTURE                      _UST_CMD(0xB1)
 
+/* Session and event notifier group commands */
+#define LTTNG_UST_COUNTER                      \
+       _UST_CMDW(0xC0, struct lttng_ust_counter)
+
+/* Counter commands */
+#define LTTNG_UST_COUNTER_GLOBAL               \
+       _UST_CMDW(0xD0, struct lttng_ust_counter_global)
+#define LTTNG_UST_COUNTER_CPU                  \
+       _UST_CMDW(0xD1, struct lttng_ust_counter_cpu)
+
 #define LTTNG_UST_ROOT_HANDLE  0
 
 struct lttng_ust_obj;
@@ -376,6 +455,12 @@ union ust_args {
        struct {
                int event_notifier_notif_fd;
        } event_notifier_handle;
+       struct {
+               void *counter_data;
+       } counter;
+       struct {
+               int shm_fd;
+       } counter_shm;
 };
 
 struct lttng_ust_objd_ops {