Fix: sample discarded events count before reserve

[lttng-modules.git] / include / ringbuffer / frontend.h

diff --git a/include/ringbuffer/frontend.h b/include/ringbuffer/frontend.h
index 1707d7133ca986a92aaa8b228a27b762ce522fac..57e09aa886edf2f6688eae67ba74f65b3b51c335 100644 (file)
--- a/include/ringbuffer/frontend.h
+++ b/include/ringbuffer/frontend.h
@@ -52,7 +52,7 @@
  */
 
 extern
-struct channel *channel_create(const struct lib_ring_buffer_config *config,
+struct lttng_kernel_ring_buffer_channel *channel_create(const struct lttng_kernel_ring_buffer_config *config,
                               const char *name, void *priv,
                               void *buf_addr,
                               size_t subbuf_size, size_t num_subbuf,
@@ -65,7 +65,7 @@ struct channel *channel_create(const struct lib_ring_buffer_config *config,
  * channel.
  */
 extern
-void *channel_destroy(struct channel *chan);
+void *channel_destroy(struct lttng_kernel_ring_buffer_channel *chan);
 
 
 /* Buffer read operations */
@@ -81,37 +81,37 @@ void *channel_destroy(struct channel *chan);
                ({ (cpu) = cpumask_next(cpu, (chan)->backend.cpumask);  \
                   smp_rmb(); (cpu) < nr_cpu_ids; });)
 
-extern struct lib_ring_buffer *channel_get_ring_buffer(
-                               const struct lib_ring_buffer_config *config,
-                               struct channel *chan, int cpu);
-extern int lib_ring_buffer_open_read(struct lib_ring_buffer *buf);
-extern void lib_ring_buffer_release_read(struct lib_ring_buffer *buf);
+extern struct lttng_kernel_ring_buffer *channel_get_ring_buffer(
+                               const struct lttng_kernel_ring_buffer_config *config,
+                               struct lttng_kernel_ring_buffer_channel *chan, int cpu);
+extern int lib_ring_buffer_open_read(struct lttng_kernel_ring_buffer *buf);
+extern void lib_ring_buffer_release_read(struct lttng_kernel_ring_buffer *buf);
 
 /*
  * Read sequence: snapshot, many get_subbuf/put_subbuf, move_consumer.
  */
-extern int lib_ring_buffer_snapshot(struct lib_ring_buffer *buf,
+extern int lib_ring_buffer_snapshot(struct lttng_kernel_ring_buffer *buf,
                                    unsigned long *consumed,
                                    unsigned long *produced);
 extern int lib_ring_buffer_snapshot_sample_positions(
-                                   struct lib_ring_buffer *buf,
+                                   struct lttng_kernel_ring_buffer *buf,
                                    unsigned long *consumed,
                                    unsigned long *produced);
-extern void lib_ring_buffer_move_consumer(struct lib_ring_buffer *buf,
+extern void lib_ring_buffer_move_consumer(struct lttng_kernel_ring_buffer *buf,
                                          unsigned long consumed_new);
 
-extern int lib_ring_buffer_get_subbuf(struct lib_ring_buffer *buf,
+extern int lib_ring_buffer_get_subbuf(struct lttng_kernel_ring_buffer *buf,
                                      unsigned long consumed);
-extern void lib_ring_buffer_put_subbuf(struct lib_ring_buffer *buf);
+extern void lib_ring_buffer_put_subbuf(struct lttng_kernel_ring_buffer *buf);
 
-void lib_ring_buffer_set_quiescent_channel(struct channel *chan);
-void lib_ring_buffer_clear_quiescent_channel(struct channel *chan);
+void lib_ring_buffer_set_quiescent_channel(struct lttng_kernel_ring_buffer_channel *chan);
+void lib_ring_buffer_clear_quiescent_channel(struct lttng_kernel_ring_buffer_channel *chan);
 
 /*
  * lib_ring_buffer_get_next_subbuf/lib_ring_buffer_put_next_subbuf are helpers
  * to read sub-buffers sequentially.
  */
-static inline int lib_ring_buffer_get_next_subbuf(struct lib_ring_buffer *buf)
+static inline int lib_ring_buffer_get_next_subbuf(struct lttng_kernel_ring_buffer *buf)
 {
        int ret;
 
@@ -123,26 +123,26 @@ static inline int lib_ring_buffer_get_next_subbuf(struct lib_ring_buffer *buf)
        return ret;
 }
 
-static inline void lib_ring_buffer_put_next_subbuf(struct lib_ring_buffer *buf)
+static inline void lib_ring_buffer_put_next_subbuf(struct lttng_kernel_ring_buffer *buf)
 {
        lib_ring_buffer_put_subbuf(buf);
        lib_ring_buffer_move_consumer(buf, subbuf_align(buf->cons_snapshot,
                                                    buf->backend.chan));
 }
 
-extern void channel_reset(struct channel *chan);
-extern void lib_ring_buffer_reset(struct lib_ring_buffer *buf);
+extern void channel_reset(struct lttng_kernel_ring_buffer_channel *chan);
+extern void lib_ring_buffer_reset(struct lttng_kernel_ring_buffer *buf);
 
 static inline
-unsigned long lib_ring_buffer_get_offset(const struct lib_ring_buffer_config *config,
-                                        struct lib_ring_buffer *buf)
+unsigned long lib_ring_buffer_get_offset(const struct lttng_kernel_ring_buffer_config *config,
+                                        struct lttng_kernel_ring_buffer *buf)
 {
        return v_read(config, &buf->offset);
 }
 
 static inline
-unsigned long lib_ring_buffer_get_consumed(const struct lib_ring_buffer_config *config,
-                                          struct lib_ring_buffer *buf)
+unsigned long lib_ring_buffer_get_consumed(const struct lttng_kernel_ring_buffer_config *config,
+                                          struct lttng_kernel_ring_buffer *buf)
 {
        return atomic_long_read(&buf->consumed);
 }
@@ -152,8 +152,8 @@ unsigned long lib_ring_buffer_get_consumed(const struct lib_ring_buffer_config *
  * ordering enforced with respect to trace teardown).
  */
 static inline
-int lib_ring_buffer_is_finalized(const struct lib_ring_buffer_config *config,
-                                struct lib_ring_buffer *buf)
+int lib_ring_buffer_is_finalized(const struct lttng_kernel_ring_buffer_config *config,
+                                struct lttng_kernel_ring_buffer *buf)
 {
        int finalized = LTTNG_READ_ONCE(buf->finalized);
        /*
@@ -164,69 +164,69 @@ int lib_ring_buffer_is_finalized(const struct lib_ring_buffer_config *config,
 }
 
 static inline
-int lib_ring_buffer_channel_is_finalized(const struct channel *chan)
+int lib_ring_buffer_channel_is_finalized(const struct lttng_kernel_ring_buffer_channel *chan)
 {
        return chan->finalized;
 }
 
 static inline
-int lib_ring_buffer_channel_is_disabled(const struct channel *chan)
+int lib_ring_buffer_channel_is_disabled(const struct lttng_kernel_ring_buffer_channel *chan)
 {
        return atomic_read(&chan->record_disabled);
 }
 
 static inline
 unsigned long lib_ring_buffer_get_read_data_size(
-                               const struct lib_ring_buffer_config *config,
-                               struct lib_ring_buffer *buf)
+                               const struct lttng_kernel_ring_buffer_config *config,
+                               struct lttng_kernel_ring_buffer *buf)
 {
        return subbuffer_get_read_data_size(config, &buf->backend);
 }
 
 static inline
 unsigned long lib_ring_buffer_get_records_count(
-                               const struct lib_ring_buffer_config *config,
-                               struct lib_ring_buffer *buf)
+                               const struct lttng_kernel_ring_buffer_config *config,
+                               struct lttng_kernel_ring_buffer *buf)
 {
        return v_read(config, &buf->records_count);
 }
 
 static inline
 unsigned long lib_ring_buffer_get_records_overrun(
-                               const struct lib_ring_buffer_config *config,
-                               struct lib_ring_buffer *buf)
+                               const struct lttng_kernel_ring_buffer_config *config,
+                               struct lttng_kernel_ring_buffer *buf)
 {
        return v_read(config, &buf->records_overrun);
 }
 
 static inline
 unsigned long lib_ring_buffer_get_records_lost_full(
-                               const struct lib_ring_buffer_config *config,
-                               struct lib_ring_buffer *buf)
+                               const struct lttng_kernel_ring_buffer_config *config __attribute__((unused)),
+                               const struct lttng_kernel_ring_buffer_ctx *ctx)
 {
-       return v_read(config, &buf->records_lost_full);
+       return ctx->priv.records_lost_full;
 }
 
 static inline
 unsigned long lib_ring_buffer_get_records_lost_wrap(
-                               const struct lib_ring_buffer_config *config,
-                               struct lib_ring_buffer *buf)
+                               const struct lttng_kernel_ring_buffer_config *config __attribute__((unused)),
+                               const struct lttng_kernel_ring_buffer_ctx *ctx)
 {
-       return v_read(config, &buf->records_lost_wrap);
+       return ctx->priv.records_lost_wrap;
 }
 
 static inline
 unsigned long lib_ring_buffer_get_records_lost_big(
-                               const struct lib_ring_buffer_config *config,
-                               struct lib_ring_buffer *buf)
+                               const struct lttng_kernel_ring_buffer_config *config __attribute__((unused)),
+                               const struct lttng_kernel_ring_buffer_ctx *ctx)
 {
-       return v_read(config, &buf->records_lost_big);
+       return ctx->priv.records_lost_big;
 }
 
 static inline
 unsigned long lib_ring_buffer_get_records_read(
-                               const struct lib_ring_buffer_config *config,
-                               struct lib_ring_buffer *buf)
+                               const struct lttng_kernel_ring_buffer_config *config,
+                               struct lttng_kernel_ring_buffer *buf)
 {
        return v_read(config, &buf->backend.records_read);
 }