-/*
+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
+ *
* lttng-ring-buffer-client.h
*
* LTTng lib ring buffer client template.
*
* Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/module.h>
#include <linux/types.h>
-#include "lib/bitfield.h"
-#include "wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */
-#include "wrapper/trace-clock.h"
-#include "lttng-events.h"
-#include "lttng-tracer.h"
-#include "wrapper/ringbuffer/frontend_types.h"
+#include <lttng/bitfield.h>
+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
+#include <wrapper/trace-clock.h>
+#include <lttng/events.h>
+#include <lttng/tracer.h>
+#include <ringbuffer/frontend_types.h>
#define LTTNG_COMPACT_EVENT_BITS 5
#define LTTNG_COMPACT_TSC_BITS 27
*/
uint8_t uuid[16];
uint32_t stream_id;
+ uint64_t stream_instance_id;
struct {
/* Stream packet context */
uint64_t timestamp_end; /* Cycle count at subbuffer end */
uint64_t content_size; /* Size of data in subbuffer */
uint64_t packet_size; /* Subbuffer size (include padding) */
+ uint64_t packet_seq_num; /* Packet sequence number */
unsigned long events_discarded; /*
* Events lost in this subbuffer since
* the beginning of the trace.
} ctx;
};
+struct lttng_client_ctx {
+ size_t packet_context_len;
+ size_t event_context_len;
+};
static inline notrace u64 lib_ring_buffer_clock_read(struct channel *chan)
{
}
static inline
-size_t ctx_get_size(size_t offset, struct lttng_ctx *ctx)
+size_t ctx_get_aligned_size(size_t offset, struct lttng_ctx *ctx,
+ size_t ctx_len)
{
- int i;
size_t orig_offset = offset;
if (likely(!ctx))
return 0;
offset += lib_ring_buffer_align(offset, ctx->largest_align);
- for (i = 0; i < ctx->nr_fields; i++)
- offset += ctx->fields[i].get_size(offset);
+ offset += ctx_len;
return offset - orig_offset;
}
+static inline
+void ctx_get_struct_size(struct lttng_ctx *ctx, size_t *ctx_len,
+ struct lttng_channel *chan, struct lib_ring_buffer_ctx *bufctx)
+{
+ int i;
+ size_t offset = 0;
+
+ if (likely(!ctx)) {
+ *ctx_len = 0;
+ return;
+ }
+ for (i = 0; i < ctx->nr_fields; i++) {
+ if (ctx->fields[i].get_size)
+ offset += ctx->fields[i].get_size(offset);
+ if (ctx->fields[i].get_size_arg)
+ offset += ctx->fields[i].get_size_arg(offset,
+ &ctx->fields[i], bufctx, chan);
+ }
+ *ctx_len = offset;
+}
+
static inline
void ctx_record(struct lib_ring_buffer_ctx *bufctx,
struct lttng_channel *chan,
* contains.
*/
static __inline__
-unsigned char record_header_size(const struct lib_ring_buffer_config *config,
+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 lib_ring_buffer_ctx *ctx,
+ struct lttng_client_ctx *client_ctx)
{
struct lttng_channel *lttng_chan = channel_get_private(chan);
- struct lttng_event *event = ctx->priv;
+ struct lttng_probe_ctx *lttng_probe_ctx = ctx->priv;
+ struct lttng_event *event = lttng_probe_ctx->event;
size_t orig_offset = offset;
size_t padding;
padding = 0;
WARN_ON_ONCE(1);
}
- offset += ctx_get_size(offset, event->ctx);
- offset += ctx_get_size(offset, lttng_chan->ctx);
+ offset += ctx_get_aligned_size(offset, lttng_chan->ctx,
+ client_ctx->packet_context_len);
+ offset += ctx_get_aligned_size(offset, event->ctx,
+ client_ctx->event_context_len);
*pre_header_padding = padding;
return offset - orig_offset;
}
-#include "wrapper/ringbuffer/api.h"
+#include <ringbuffer/api.h>
static
void lttng_write_event_header_slow(const struct lib_ring_buffer_config *config,
uint32_t event_id)
{
struct lttng_channel *lttng_chan = channel_get_private(ctx->chan);
- struct lttng_event *event = ctx->priv;
+ struct lttng_probe_ctx *lttng_probe_ctx = ctx->priv;
+ struct lttng_event *event = lttng_probe_ctx->event;
if (unlikely(ctx->rflags))
goto slow_path;
uint32_t event_id)
{
struct lttng_channel *lttng_chan = channel_get_private(ctx->chan);
- struct lttng_event *event = ctx->priv;
+ struct lttng_probe_ctx *lttng_probe_ctx = ctx->priv;
+ struct lttng_event *event = lttng_probe_ctx->event;
switch (lttng_chan->header_type) {
case 1: /* compact */
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 lib_ring_buffer_ctx *ctx,
+ void *client_ctx)
{
return record_header_size(config, chan, offset,
- pre_header_padding, ctx);
+ pre_header_padding, ctx, client_ctx);
}
/**
header->magic = CTF_MAGIC_NUMBER;
memcpy(header->uuid, session->uuid.b, sizeof(session->uuid));
header->stream_id = lttng_chan->id;
+ header->stream_instance_id = buf->backend.cpu;
header->ctx.timestamp_begin = tsc;
header->ctx.timestamp_end = 0;
header->ctx.content_size = ~0ULL; /* for debugging */
header->ctx.packet_size = ~0ULL;
+ header->ctx.packet_seq_num = chan->backend.num_subbuf * \
+ buf->backend.buf_cnt[subbuf_idx].seq_cnt + \
+ subbuf_idx;
header->ctx.events_discarded = 0;
header->ctx.cpu_id = buf->backend.cpu;
}
struct lib_ring_buffer *buf,
uint64_t *stream_id)
{
- struct packet_header *header = client_packet_header(config, buf);
- *stream_id = header->stream_id;
+ struct channel *chan = buf->backend.chan;
+ struct lttng_channel *lttng_chan = channel_get_private(chan);
+ *stream_id = lttng_chan->id;
return 0;
}
return 0;
}
+static int client_sequence_number(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf,
+ uint64_t *seq)
+{
+ struct packet_header *header = client_packet_header(config, buf);
+
+ *seq = header->ctx.packet_seq_num;
+
+ return 0;
+}
+
+static
+int client_instance_id(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *buf,
+ uint64_t *id)
+{
+ *id = buf->backend.cpu;
+
+ return 0;
+}
+
static const struct lib_ring_buffer_config client_config = {
.cb.ring_buffer_clock_read = client_ring_buffer_clock_read,
.cb.record_header_size = client_record_header_size,
uint32_t event_id)
{
struct lttng_channel *lttng_chan = channel_get_private(ctx->chan);
+ struct lttng_probe_ctx *lttng_probe_ctx = ctx->priv;
+ struct lttng_event *event = lttng_probe_ctx->event;
+ struct lttng_client_ctx client_ctx;
int ret, cpu;
cpu = lib_ring_buffer_get_cpu(&client_config);
- if (cpu < 0)
+ if (unlikely(cpu < 0))
return -EPERM;
ctx->cpu = cpu;
+ /* Compute internal size of context structures. */
+ ctx_get_struct_size(lttng_chan->ctx, &client_ctx.packet_context_len, lttng_chan, ctx);
+ ctx_get_struct_size(event->ctx, &client_ctx.event_context_len, lttng_chan, ctx);
+
switch (lttng_chan->header_type) {
case 1: /* compact */
if (event_id > 30)
WARN_ON_ONCE(1);
}
- ret = lib_ring_buffer_reserve(&client_config, ctx);
- if (ret)
+ ret = lib_ring_buffer_reserve(&client_config, ctx, &client_ctx);
+ if (unlikely(ret))
goto put;
+ lib_ring_buffer_backend_get_pages(&client_config, ctx,
+ &ctx->backend_pages);
lttng_write_event_header(&client_config, ctx, event_id);
return 0;
put:
.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,
},
};
* This vmalloc sync all also takes care of the lib ring buffer
* vmalloc'd module pages when it is built as a module into LTTng.
*/
- wrapper_vmalloc_sync_all();
+ wrapper_vmalloc_sync_mappings();
lttng_transport_register(<tng_relay_transport);
return 0;
}
module_exit(lttng_ring_buffer_client_exit);
MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
MODULE_DESCRIPTION("LTTng ring buffer " RING_BUFFER_MODE_TEMPLATE_STRING
" client");
+MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
+ __stringify(LTTNG_MODULES_MINOR_VERSION) "."
+ __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
+ LTTNG_MODULES_EXTRAVERSION);
projects / lttng-modules.git / blobdiff