Implement event notifier error counter

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

diff --git a/include/lttng/abi.h b/include/lttng/abi.h
index 071133f6228afbb3876bbb0813ec2f4a3c340f36..843acbe72fc5f51af91c679eba6f27793d872bb3 100644 (file)
--- a/include/lttng/abi.h
+++ b/include/lttng/abi.h
@@ -11,6 +11,7 @@
 #define _LTTNG_ABI_H
 
 #include <linux/fs.h>
+#include <linux/types.h>
 
 /*
  * Major/minor version of ABI exposed to lttng tools. Major number
@@ -140,10 +141,69 @@ struct lttng_kernel_event {
 #define LTTNG_KERNEL_EVENT_NOTIFIER_PADDING1   16
 struct lttng_kernel_event_notifier {
        struct lttng_kernel_event event;
+       uint64_t error_counter_index;
 
        char padding[LTTNG_KERNEL_EVENT_NOTIFIER_PADDING1];
 } __attribute__((packed));
 
+enum lttng_kernel_counter_arithmetic {
+    LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR = 1,
+};
+
+enum lttng_kernel_counter_bitness {
+    LTTNG_KERNEL_COUNTER_BITNESS_32 = 1,
+    LTTNG_KERNEL_COUNTER_BITNESS_64 = 2,
+};
+
+struct lttng_kernel_counter_dimension {
+       uint64_t size;
+       uint64_t underflow_index;
+       uint64_t overflow_index;
+       uint8_t has_underflow;
+       uint8_t has_overflow;
+} __attribute__((packed));
+
+#define LTTNG_KERNEL_COUNTER_DIMENSION_MAX 4
+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];
+} __attribute__((packed));
+
+struct lttng_kernel_counter_index {
+       uint32_t number_dimensions;
+       uint64_t dimension_indexes[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
+} __attribute__((packed));
+
+struct lttng_kernel_counter_value {
+       int64_t value;
+       uint8_t underflow;
+       uint8_t overflow;
+} __attribute__((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];
+} __attribute__((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];
+} __attribute__((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];
+} __attribute__((packed));
+
 #define LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
 struct lttng_kernel_event_notifier_notification {
        uint64_t token;
@@ -329,11 +389,15 @@ struct lttng_kernel_tracker_args {
 #define LTTNG_KERNEL_CONTEXT                   \
        _IOW(0xF6, 0x71, struct lttng_kernel_context)
 
-/* Event, Event notifier, Channel and Session ioctl */
+/* Event, Event notifier, Channel, Counter and Session ioctl */
 /* lttng/abi-old.h reserve 0x80 and 0x81. */
 #define LTTNG_KERNEL_ENABLE                    _IO(0xF6, 0x82)
 #define LTTNG_KERNEL_DISABLE                   _IO(0xF6, 0x83)
 
+/* Trigger group and session ioctl */
+#define LTTNG_KERNEL_COUNTER \
+       _IOW(0xF6, 0x84, struct lttng_kernel_counter_conf)
+
 /* Event and Event notifier FD ioctl */
 #define LTTNG_KERNEL_FILTER                    _IO(0xF6, 0x90)
 #define LTTNG_KERNEL_ADD_CALLSITE              _IO(0xF6, 0x91)
@@ -355,6 +419,15 @@ struct lttng_kernel_tracker_args {
 /* Event notifier file descriptor ioctl */
 #define LTTNG_KERNEL_CAPTURE                   _IO(0xF6, 0xB8)
 
+/* Counter file descriptor ioctl */
+#define LTTNG_KERNEL_COUNTER_READ \
+       _IOWR(0xF6, 0xC0, struct lttng_kernel_counter_read)
+#define LTTNG_KERNEL_COUNTER_AGGREGATE \
+       _IOWR(0xF6, 0xC1, struct lttng_kernel_counter_aggregate)
+#define LTTNG_KERNEL_COUNTER_CLEAR \
+       _IOW(0xF6, 0xC2, struct lttng_kernel_counter_clear)
+
+
 /*
  * LTTng-specific ioctls for the lib ringbuffer.
  *