* Copyright (C) 2010-2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
+#include <linux/limits.h>
#include <linux/module.h>
#include <linux/types.h>
#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
+#include <lttng/abi.h>
#include <lttng/events.h>
+#include <lttng/events-internal.h>
#include <lttng/tracer.h>
+#include <wrapper/limits.h>
static struct lttng_transport lttng_relay_transport;
};
struct event_notifier_record_header {
+ uint32_t payload_len; /* in bytes */
uint8_t header_end[0]; /* End of header */
};
size_t record_header_size(const struct lib_ring_buffer_config *config,
struct 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)
{
- return 0;
+ size_t orig_offset = offset;
+ size_t padding;
+
+ padding = lib_ring_buffer_align(offset, lttng_alignof(uint32_t));
+ offset += padding;
+
+ offset += sizeof(uint32_t);
+
+ *pre_header_padding = padding;
+
+ return offset - orig_offset;
}
#include <ringbuffer/api.h>
size_t client_record_header_size(const struct lib_ring_buffer_config *config,
struct 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)
{
- return 0;
+ return record_header_size(config, chan, offset,
+ pre_header_padding, ctx, client_ctx);
}
/**
offsetof(struct event_notifier_record_header, header_end));
CHAN_WARN_ON(chan, ret != offsetof(struct event_notifier_record_header, header_end));
*header_len = offsetof(struct event_notifier_record_header, header_end);
- /*
- * Currently, only 64-bit event notifier ID.
- */
- *payload_len = sizeof(uint64_t);
+ *payload_len = header.payload_len;
*timestamp = 0;
}
}
static
-int lttng_event_reserve(struct lib_ring_buffer_ctx *ctx, uint32_t event_id)
+void lttng_write_event_notifier_header(const struct lib_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer_ctx *ctx)
+{
+ uint32_t data_size;
+
+ WARN_ON_ONCE(ctx->data_size > U32_MAX);
+
+ data_size = (uint32_t) ctx->data_size;
+
+ lib_ring_buffer_write(config, ctx, &data_size, sizeof(data_size));
+
+ lib_ring_buffer_align_ctx(ctx, ctx->largest_align);
+}
+
+static
+int lttng_event_reserve(struct lttng_kernel_ring_buffer_ctx *ctx)
{
+ struct channel *chan = ctx->client_priv;
int ret;
+ memset(&ctx->priv, 0, sizeof(ctx->priv));
+ ctx->priv.chan = chan;
+
ret = lib_ring_buffer_reserve(&client_config, ctx, NULL);
if (ret)
return ret;
lib_ring_buffer_backend_get_pages(&client_config, ctx,
- &ctx->backend_pages);
+ &ctx->priv.backend_pages);
+
+ lttng_write_event_notifier_header(&client_config, ctx);
return 0;
}
static
-void lttng_event_commit(struct lib_ring_buffer_ctx *ctx)
+void lttng_event_commit(struct lttng_kernel_ring_buffer_ctx *ctx)
{
lib_ring_buffer_commit(&client_config, ctx);
}
static
-void lttng_event_write(struct lib_ring_buffer_ctx *ctx, const void *src,
+void lttng_event_write(struct lttng_kernel_ring_buffer_ctx *ctx, const void *src,
size_t len)
{
lib_ring_buffer_write(&client_config, ctx, src, len);
}
static
-void lttng_event_write_from_user(struct lib_ring_buffer_ctx *ctx,
+void lttng_event_write_from_user(struct lttng_kernel_ring_buffer_ctx *ctx,
const void __user *src, size_t len)
{
lib_ring_buffer_copy_from_user_inatomic(&client_config, ctx, src, len);
}
static
-void lttng_event_memset(struct lib_ring_buffer_ctx *ctx,
+void lttng_event_memset(struct lttng_kernel_ring_buffer_ctx *ctx,
int c, size_t len)
{
lib_ring_buffer_memset(&client_config, ctx, c, len);
}
static
-void lttng_event_strcpy(struct lib_ring_buffer_ctx *ctx, const char *src,
+void lttng_event_strcpy(struct lttng_kernel_ring_buffer_ctx *ctx, const char *src,
size_t len)
{
lib_ring_buffer_strcpy(&client_config, ctx, src, len, '#');
.name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING,
.owner = THIS_MODULE,
.ops = {
- .channel_create = _channel_create,
- .channel_destroy = lttng_channel_destroy,
- .buffer_read_open = lttng_buffer_read_open,
- .buffer_has_read_closed_stream =
- lttng_buffer_has_read_closed_stream,
- .buffer_read_close = lttng_buffer_read_close,
+ .priv = __LTTNG_COMPOUND_LITERAL(struct lttng_kernel_channel_buffer_ops_private, {
+ .pub = <tng_relay_transport.ops,
+ .channel_create = _channel_create,
+ .channel_destroy = lttng_channel_destroy,
+ .buffer_read_open = lttng_buffer_read_open,
+ .buffer_has_read_closed_stream =
+ lttng_buffer_has_read_closed_stream,
+ .buffer_read_close = lttng_buffer_read_close,
+ .packet_avail_size = lttng_packet_avail_size,
+ .get_writer_buf_wait_queue = lttng_get_writer_buf_wait_queue,
+ .get_hp_wait_queue = lttng_get_hp_wait_queue,
+ .is_finalized = lttng_is_finalized,
+ .is_disabled = lttng_is_disabled,
+ .timestamp_begin = client_timestamp_begin,
+ .timestamp_end = client_timestamp_end,
+ .events_discarded = client_events_discarded,
+ .content_size = client_content_size,
+ .packet_size = client_packet_size,
+ .stream_id = client_stream_id,
+ .current_timestamp = client_current_timestamp,
+ .sequence_number = client_sequence_number,
+ .instance_id = client_instance_id,
+ }),
.event_reserve = lttng_event_reserve,
.event_commit = lttng_event_commit,
.event_write_from_user = lttng_event_write_from_user,
.event_memset = lttng_event_memset,
.event_write = lttng_event_write,
.event_strcpy = lttng_event_strcpy,
- .packet_avail_size = lttng_packet_avail_size,
- .get_writer_buf_wait_queue = lttng_get_writer_buf_wait_queue,
- .get_hp_wait_queue = lttng_get_hp_wait_queue,
- .is_finalized = lttng_is_finalized,
- .is_disabled = lttng_is_disabled,
- .timestamp_begin = client_timestamp_begin,
- .timestamp_end = client_timestamp_end,
- .events_discarded = client_events_discarded,
- .content_size = client_content_size,
- .packet_size = client_packet_size,
- .stream_id = client_stream_id,
- .current_timestamp = client_current_timestamp,
- .sequence_number = client_sequence_number,
- .instance_id = client_instance_id,
},
};
projects / lttng-modules.git / blobdiff