#include <lttng/align.h>
#include <lttng/tracer-core.h>
-struct lib_ring_buffer;
-struct channel;
-struct lib_ring_buffer_config;
-struct lib_ring_buffer_ctx;
+struct lttng_kernel_ring_buffer;
+struct lttng_kernel_ring_buffer_channel;
+struct lttng_kernel_ring_buffer_config;
+struct lttng_kernel_ring_buffer_ctx;
struct lttng_kernel_ring_buffer_ctx_private;
/*
* provided as inline functions too. These may simply return 0 if not used by
* the client.
*/
-struct lib_ring_buffer_client_cb {
+struct lttng_kernel_ring_buffer_client_cb {
/* Mandatory callbacks */
/* A static inline version is also required for fast path */
- u64 (*ring_buffer_clock_read) (struct channel *chan);
- size_t (*record_header_size) (const struct lib_ring_buffer_config *config,
- struct channel *chan, size_t offset,
+ u64 (*ring_buffer_clock_read) (struct lttng_kernel_ring_buffer_channel *chan);
+ size_t (*record_header_size) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer_channel *chan, size_t offset,
size_t *pre_header_padding,
- struct lib_ring_buffer_ctx *ctx,
+ struct lttng_kernel_ring_buffer_ctx *ctx,
void *client_ctx);
/* Slow path only, at subbuffer switch */
size_t (*subbuffer_header_size) (void);
- void (*buffer_begin) (struct lib_ring_buffer *buf, u64 tsc,
+ void (*buffer_begin) (struct lttng_kernel_ring_buffer *buf, u64 timestamp,
unsigned int subbuf_idx);
- void (*buffer_end) (struct lib_ring_buffer *buf, u64 tsc,
- unsigned int subbuf_idx, unsigned long data_size);
+ void (*buffer_end) (struct lttng_kernel_ring_buffer *buf, u64 timestamp,
+ unsigned int subbuf_idx, unsigned long data_size,
+ const struct lttng_kernel_ring_buffer_ctx *ctx);
/* Optional callbacks (can be set to NULL) */
/* Called at buffer creation/finalize */
- int (*buffer_create) (struct lib_ring_buffer *buf, void *priv,
+ int (*buffer_create) (struct lttng_kernel_ring_buffer *buf, void *priv,
int cpu, const char *name);
/*
* Clients should guarantee that no new reader handle can be opened
* after finalize.
*/
- void (*buffer_finalize) (struct lib_ring_buffer *buf, void *priv, int cpu);
+ void (*buffer_finalize) (struct lttng_kernel_ring_buffer *buf, void *priv, int cpu);
/*
* Extract header length, payload length and timestamp from event
* record. Used by buffer iterators. Timestamp is only used by channel
* iterator.
*/
- void (*record_get) (const struct lib_ring_buffer_config *config,
- struct channel *chan, struct lib_ring_buffer *buf,
+ void (*record_get) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer_channel *chan, struct lttng_kernel_ring_buffer *buf,
size_t offset, size_t *header_len,
size_t *payload_len, u64 *timestamp);
};
* RING_BUFFER_WAKEUP_NONE does not perform any wakeup whatsoever. The client
* has the responsibility to perform wakeups.
*/
-struct lib_ring_buffer_config {
+struct lttng_kernel_ring_buffer_config {
enum {
RING_BUFFER_ALLOC_PER_CPU,
RING_BUFFER_ALLOC_GLOBAL,
*/
} wakeup;
/*
- * tsc_bits: timestamp bits saved at each record.
+ * timestamp_bits: timestamp bits saved at each record.
* 0 and 64 disable the timestamp compression scheme.
*/
- unsigned int tsc_bits;
- struct lib_ring_buffer_client_cb cb;
+ unsigned int timestamp_bits;
+ struct lttng_kernel_ring_buffer_client_cb cb;
};
/*
struct lttng_kernel_ring_buffer_ctx_private {
/* input received by lib_ring_buffer_reserve(). */
- struct channel *chan; /* ring buffer channel */
+ struct lttng_kernel_ring_buffer_channel *chan; /* ring buffer channel */
/* output from lib_ring_buffer_reserve() */
int reserve_cpu; /* processor id updated by the reserve */
* prior to record header alignment
* padding.
*/
- u64 tsc; /* time-stamp counter value */
+ u64 timestamp; /* time-stamp counter value */
unsigned int rflags; /* reservation flags */
- struct lib_ring_buffer *buf; /*
+ struct lttng_kernel_ring_buffer *buf; /*
* buffer corresponding to processor id
* for this channel
*/
- struct lib_ring_buffer_backend_pages *backend_pages;
+ struct lttng_kernel_ring_buffer_backend_pages *backend_pages;
+
+ /*
+ * Records lost counts are only loaded into these fields before
+ * reserving the last bytes from the ring buffer.
+ */
+ unsigned long records_lost_full;
+ unsigned long records_lost_wrap;
+ unsigned long records_lost_big;
};
/*
* lib_ring_buffer_try_discard_reserve(), lib_ring_buffer_align_ctx() and
* lib_ring_buffer_write().
*/
-struct lib_ring_buffer_ctx {
+struct lttng_kernel_ring_buffer_ctx {
/* Private ring buffer context, set by reserve callback. */
struct lttng_kernel_ring_buffer_ctx_private priv;
* alignment of the largest element
* in the payload
*/
- struct lttng_probe_ctx *probe_ctx; /* Probe context */
+ struct lttng_kernel_probe_ctx *probe_ctx; /* Probe context */
};
/**
* @largest_align: largest alignment within data payload types
*/
static inline
-void lib_ring_buffer_ctx_init(struct lib_ring_buffer_ctx *ctx,
+void lib_ring_buffer_ctx_init(struct lttng_kernel_ring_buffer_ctx *ctx,
void *client_priv,
size_t data_size, int largest_align,
- struct lttng_probe_ctx *probe_ctx)
+ struct lttng_kernel_probe_ctx *probe_ctx)
{
ctx->client_priv = client_priv;
ctx->data_size = data_size;
/*
* Reservation flags.
*
- * RING_BUFFER_RFLAG_FULL_TSC
+ * RING_BUFFER_RFLAG_FULL_TIMESTAMP
*
* This flag is passed to record_header_size() and to the primitive used to
* write the record header. It indicates that the full 64-bit time value is
* needed in the record header. If this flag is not set, the record header needs
- * only to contain "tsc_bits" bit of time value.
+ * only to contain "timestamp_bits" bit of time value.
*
* Reservation flags can be added by the client, starting from
* "(RING_BUFFER_FLAGS_END << 0)". It can be used to pass information from
* record_header_size() to lib_ring_buffer_write_record_header().
*/
-#define RING_BUFFER_RFLAG_FULL_TSC (1U << 0)
+#define RING_BUFFER_RFLAG_FULL_TIMESTAMP (1U << 0)
#define RING_BUFFER_RFLAG_END (1U << 1)
#ifndef LTTNG_TRACER_CORE_H
* @ctx: ring buffer context.
*/
static inline
-void lib_ring_buffer_align_ctx(struct lib_ring_buffer_ctx *ctx,
+void lib_ring_buffer_align_ctx(struct lttng_kernel_ring_buffer_ctx *ctx,
size_t alignment)
{
ctx->priv.buf_offset += lib_ring_buffer_align(ctx->priv.buf_offset,
* Used internally to check for valid configurations at channel creation.
*/
static inline
-int lib_ring_buffer_check_config(const struct lib_ring_buffer_config *config,
+int lib_ring_buffer_check_config(const struct lttng_kernel_ring_buffer_config *config,
unsigned int switch_timer_interval,
unsigned int read_timer_interval)
{
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