/*
- * lttng-ring-buffer-client.h
- *
- * LTTng lib ring buffer client template.
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* 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
+ * LTTng lib ring buffer client template.
*/
+#include <limits.h>
+#include <stddef.h>
#include <stdint.h>
-#include <lttng/ust-events.h>
-#include "lttng/bitfield.h"
+
+#include <ust-events-internal.h>
+#include <lttng/urcu/pointer.h>
+#include "ust-bitfield.h"
+#include "ust-compat.h"
#include "clock.h"
+#include "context-internal.h"
#include "lttng-tracer.h"
#include "../libringbuffer/frontend_types.h"
+#include <urcu/tls-compat.h>
#define LTTNG_COMPACT_EVENT_BITS 5
#define LTTNG_COMPACT_TSC_BITS 27
+enum app_ctx_mode {
+ APP_CTX_DISABLED,
+ APP_CTX_ENABLED,
+};
+
/*
* Keep the natural field alignment for _each field_ within this structure if
* you ever add/remove a field from this header. Packed attribute is not used
*/
uint8_t uuid[LTTNG_UST_UUID_LEN];
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;
+ struct lttng_ust_ctx *chan_ctx;
+ struct lttng_ust_ctx *event_ctx;
+};
+
+/*
+ * Indexed by lib_ring_buffer_nesting_count().
+ */
+typedef struct lttng_ust_lib_ring_buffer_ctx_private private_ctx_stack_t[LIB_RING_BUFFER_MAX_NESTING];
+static DEFINE_URCU_TLS(private_ctx_stack_t, private_ctx_stack);
-static inline uint64_t lib_ring_buffer_clock_read(struct channel *chan)
+/*
+ * Force a read (imply TLS fixup for dlopen) of TLS variables.
+ */
+void RING_BUFFER_MODE_TEMPLATE_TLS_FIXUP(void)
+{
+ asm volatile ("" : : "m" (URCU_TLS(private_ctx_stack)));
+}
+
+static inline uint64_t lib_ring_buffer_clock_read(struct lttng_ust_lib_ring_buffer_channel *chan)
{
return trace_clock_read64();
}
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_ust_ctx *ctx,
+ size_t ctx_len)
{
- int i;
size_t orig_offset = offset;
if (caa_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 += lttng_ust_lib_ring_buffer_align(offset, ctx->largest_align);
+ offset += ctx_len;
return offset - orig_offset;
}
+static inline
+void ctx_get_struct_size(struct lttng_ust_ctx *ctx, size_t *ctx_len,
+ enum app_ctx_mode mode)
+{
+ int i;
+ size_t offset = 0;
+
+ if (caa_likely(!ctx)) {
+ *ctx_len = 0;
+ return;
+ }
+ for (i = 0; i < ctx->nr_fields; i++) {
+ if (mode == APP_CTX_ENABLED) {
+ offset += ctx->fields[i]->get_size(ctx->fields[i], offset);
+ } else {
+ if (lttng_context_is_app(ctx->fields[i]->event_field->name)) {
+ /*
+ * Before UST 2.8, we cannot use the
+ * application context, because we
+ * cannot trust that the handler used
+ * for get_size is the same used for
+ * ctx_record, which would result in
+ * corrupted traces when tracing
+ * concurrently with application context
+ * register/unregister.
+ */
+ offset += lttng_ust_dummy_get_size(ctx->fields[i], offset);
+ } else {
+ offset += ctx->fields[i]->get_size(ctx->fields[i], offset);
+ }
+ }
+ }
+ *ctx_len = offset;
+}
+
static inline
void ctx_record(struct lttng_ust_lib_ring_buffer_ctx *bufctx,
- struct lttng_channel *chan,
- struct lttng_ctx *ctx)
+ struct lttng_ust_channel_buffer *chan,
+ struct lttng_ust_ctx *ctx,
+ enum app_ctx_mode mode)
{
int i;
if (caa_likely(!ctx))
return;
- lib_ring_buffer_align_ctx(bufctx, ctx->largest_align);
- for (i = 0; i < ctx->nr_fields; i++)
- ctx->fields[i].record(&ctx->fields[i], bufctx, chan);
+ lttng_ust_lib_ring_buffer_align_ctx(bufctx, ctx->largest_align);
+ for (i = 0; i < ctx->nr_fields; i++) {
+ if (mode == APP_CTX_ENABLED) {
+ ctx->fields[i]->record(ctx->fields[i], bufctx, chan);
+ } else {
+ if (lttng_context_is_app(ctx->fields[i]->event_field->name)) {
+ /*
+ * Before UST 2.8, we cannot use the
+ * application context, because we
+ * cannot trust that the handler used
+ * for get_size is the same used for
+ * ctx_record, which would result in
+ * corrupted traces when tracing
+ * concurrently with application context
+ * register/unregister.
+ */
+ lttng_ust_dummy_record(ctx->fields[i], bufctx, chan);
+ } else {
+ ctx->fields[i]->record(ctx->fields[i], bufctx, chan);
+ }
+ }
+ }
}
/*
*/
static __inline__
size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config,
- struct channel *chan, size_t offset,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
+ size_t offset,
size_t *pre_header_padding,
- struct lttng_ust_lib_ring_buffer_ctx *ctx)
+ struct lttng_ust_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_ust_channel_buffer *lttng_chan = channel_get_private(chan);
size_t orig_offset = offset;
size_t padding;
- switch (lttng_chan->header_type) {
+ switch (lttng_chan->priv->header_type) {
case 1: /* compact */
- padding = lib_ring_buffer_align(offset, lttng_alignof(uint32_t));
+ padding = lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint32_t));
offset += padding;
- if (!(ctx->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
+ if (!(ctx->priv->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
offset += sizeof(uint32_t); /* id and timestamp */
} else {
/* Minimum space taken by LTTNG_COMPACT_EVENT_BITS id */
offset += (LTTNG_COMPACT_EVENT_BITS + CHAR_BIT - 1) / CHAR_BIT;
/* Align extended struct on largest member */
- offset += lib_ring_buffer_align(offset, lttng_alignof(uint64_t));
+ offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t));
offset += sizeof(uint32_t); /* id */
- offset += lib_ring_buffer_align(offset, lttng_alignof(uint64_t));
+ offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t));
offset += sizeof(uint64_t); /* timestamp */
}
break;
case 2: /* large */
- padding = lib_ring_buffer_align(offset, lttng_alignof(uint16_t));
+ padding = lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint16_t));
offset += padding;
offset += sizeof(uint16_t);
- if (!(ctx->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
- offset += lib_ring_buffer_align(offset, lttng_alignof(uint32_t));
+ if (!(ctx->priv->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
+ offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint32_t));
offset += sizeof(uint32_t); /* timestamp */
} else {
/* Align extended struct on largest member */
- offset += lib_ring_buffer_align(offset, lttng_alignof(uint64_t));
+ offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t));
offset += sizeof(uint32_t); /* id */
- offset += lib_ring_buffer_align(offset, lttng_alignof(uint64_t));
+ offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t));
offset += sizeof(uint64_t); /* timestamp */
}
break;
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, client_ctx->chan_ctx,
+ client_ctx->packet_context_len);
+ offset += ctx_get_aligned_size(offset, client_ctx->event_ctx,
+ client_ctx->event_context_len);
*pre_header_padding = padding;
return offset - orig_offset;
}
static
void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config *config,
struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ struct lttng_client_ctx *client_ctx,
uint32_t event_id);
/*
static __inline__
void lttng_write_event_header(const struct lttng_ust_lib_ring_buffer_config *config,
struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ struct lttng_client_ctx *client_ctx,
uint32_t event_id)
{
- struct lttng_channel *lttng_chan = channel_get_private(ctx->chan);
- struct lttng_event *event = ctx->priv;
+ struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->priv->chan);
- if (caa_unlikely(ctx->rflags))
+ if (caa_unlikely(ctx->priv->rflags))
goto slow_path;
- switch (lttng_chan->header_type) {
+ switch (lttng_chan->priv->header_type) {
case 1: /* compact */
{
uint32_t id_time = 0;
bt_bitfield_write(&id_time, uint32_t,
LTTNG_COMPACT_EVENT_BITS,
LTTNG_COMPACT_TSC_BITS,
- ctx->tsc);
+ ctx->priv->tsc);
lib_ring_buffer_write(config, ctx, &id_time, sizeof(id_time));
break;
}
case 2: /* large */
{
- uint32_t timestamp = (uint32_t) ctx->tsc;
+ uint32_t timestamp = (uint32_t) ctx->priv->tsc;
uint16_t id = event_id;
lib_ring_buffer_write(config, ctx, &id, sizeof(id));
- lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint32_t));
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint32_t));
lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp));
break;
}
WARN_ON_ONCE(1);
}
- ctx_record(ctx, lttng_chan, lttng_chan->ctx);
- ctx_record(ctx, lttng_chan, event->ctx);
- lib_ring_buffer_align_ctx(ctx, ctx->largest_align);
+ ctx_record(ctx, lttng_chan, client_ctx->chan_ctx, APP_CTX_ENABLED);
+ ctx_record(ctx, lttng_chan, client_ctx->event_ctx, APP_CTX_ENABLED);
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, ctx->largest_align);
return;
slow_path:
- lttng_write_event_header_slow(config, ctx, event_id);
+ lttng_write_event_header_slow(config, ctx, client_ctx, event_id);
}
static
void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config *config,
struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ struct lttng_client_ctx *client_ctx,
uint32_t event_id)
{
- struct lttng_channel *lttng_chan = channel_get_private(ctx->chan);
- struct lttng_event *event = ctx->priv;
+ struct lttng_ust_lib_ring_buffer_ctx_private *ctx_private = ctx->priv;
+ struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->priv->chan);
- switch (lttng_chan->header_type) {
+ switch (lttng_chan->priv->header_type) {
case 1: /* compact */
- if (!(ctx->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
+ if (!(ctx_private->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
uint32_t id_time = 0;
bt_bitfield_write(&id_time, uint32_t,
bt_bitfield_write(&id_time, uint32_t,
LTTNG_COMPACT_EVENT_BITS,
LTTNG_COMPACT_TSC_BITS,
- ctx->tsc);
+ ctx_private->tsc);
lib_ring_buffer_write(config, ctx, &id_time, sizeof(id_time));
} else {
uint8_t id = 0;
- uint64_t timestamp = ctx->tsc;
+ uint64_t timestamp = ctx_private->tsc;
bt_bitfield_write(&id, uint8_t,
0,
31);
lib_ring_buffer_write(config, ctx, &id, sizeof(id));
/* Align extended struct on largest member */
- lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t));
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t));
lib_ring_buffer_write(config, ctx, &event_id, sizeof(event_id));
- lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t));
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t));
lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp));
}
break;
case 2: /* large */
{
- if (!(ctx->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
- uint32_t timestamp = (uint32_t) ctx->tsc;
+ if (!(ctx_private->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
+ uint32_t timestamp = (uint32_t) ctx_private->tsc;
uint16_t id = event_id;
lib_ring_buffer_write(config, ctx, &id, sizeof(id));
- lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint32_t));
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint32_t));
lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp));
} else {
uint16_t id = 65535;
- uint64_t timestamp = ctx->tsc;
+ uint64_t timestamp = ctx_private->tsc;
lib_ring_buffer_write(config, ctx, &id, sizeof(id));
/* Align extended struct on largest member */
- lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t));
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t));
lib_ring_buffer_write(config, ctx, &event_id, sizeof(event_id));
- lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t));
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t));
lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp));
}
break;
default:
WARN_ON_ONCE(1);
}
- ctx_record(ctx, lttng_chan, lttng_chan->ctx);
- ctx_record(ctx, lttng_chan, event->ctx);
- lib_ring_buffer_align_ctx(ctx, ctx->largest_align);
+ ctx_record(ctx, lttng_chan, client_ctx->chan_ctx, APP_CTX_ENABLED);
+ ctx_record(ctx, lttng_chan, client_ctx->event_ctx, APP_CTX_ENABLED);
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, ctx->largest_align);
}
static const struct lttng_ust_lib_ring_buffer_config client_config;
-static uint64_t client_ring_buffer_clock_read(struct channel *chan)
+static uint64_t client_ring_buffer_clock_read(struct lttng_ust_lib_ring_buffer_channel *chan)
{
return lib_ring_buffer_clock_read(chan);
}
static
size_t client_record_header_size(const struct lttng_ust_lib_ring_buffer_config *config,
- struct channel *chan, size_t offset,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
+ size_t offset,
size_t *pre_header_padding,
- struct lttng_ust_lib_ring_buffer_ctx *ctx)
+ struct lttng_ust_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);
}
/**
unsigned int subbuf_idx,
struct lttng_ust_shm_handle *handle)
{
- struct channel *chan = shmp(handle, buf->backend.chan);
+ struct lttng_ust_lib_ring_buffer_channel *chan = shmp(handle, buf->backend.chan);
struct packet_header *header =
(struct packet_header *)
lib_ring_buffer_offset_address(&buf->backend,
subbuf_idx * chan->backend.subbuf_size,
handle);
- struct lttng_channel *lttng_chan = channel_get_private(chan);
+ struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan);
+ uint64_t cnt = shmp_index(handle, buf->backend.buf_cnt, subbuf_idx)->seq_cnt;
assert(header);
if (!header)
return;
header->magic = CTF_MAGIC_NUMBER;
- memcpy(header->uuid, lttng_chan->uuid, sizeof(lttng_chan->uuid));
- header->stream_id = lttng_chan->id;
+ memcpy(header->uuid, lttng_chan->priv->uuid, sizeof(lttng_chan->priv->uuid));
+ header->stream_id = lttng_chan->priv->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 * cnt + subbuf_idx;
header->ctx.events_discarded = 0;
header->ctx.cpu_id = buf->backend.cpu;
}
unsigned int subbuf_idx, unsigned long data_size,
struct lttng_ust_shm_handle *handle)
{
- struct channel *chan = shmp(handle, buf->backend.chan);
+ struct lttng_ust_lib_ring_buffer_channel *chan = shmp(handle, buf->backend.chan);
struct packet_header *header =
(struct packet_header *)
lib_ring_buffer_offset_address(&buf->backend,
header->ctx.content_size =
(uint64_t) data_size * CHAR_BIT; /* in bits */
header->ctx.packet_size =
- (uint64_t) PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
+ (uint64_t) LTTNG_UST_PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
records_lost += lib_ring_buffer_get_records_lost_full(&client_config, buf);
records_lost += lib_ring_buffer_get_records_lost_wrap(&client_config, buf);
}
static int client_timestamp_begin(struct lttng_ust_lib_ring_buffer *buf,
- struct lttng_ust_shm_handle *handle,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
uint64_t *timestamp_begin)
{
+ struct lttng_ust_shm_handle *handle = chan->handle;
struct packet_header *header;
header = client_packet_header(buf, handle);
}
static int client_timestamp_end(struct lttng_ust_lib_ring_buffer *buf,
- struct lttng_ust_shm_handle *handle,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
uint64_t *timestamp_end)
{
+ struct lttng_ust_shm_handle *handle = chan->handle;
struct packet_header *header;
header = client_packet_header(buf, handle);
}
static int client_events_discarded(struct lttng_ust_lib_ring_buffer *buf,
- struct lttng_ust_shm_handle *handle,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
uint64_t *events_discarded)
{
+ struct lttng_ust_shm_handle *handle = chan->handle;
struct packet_header *header;
header = client_packet_header(buf, handle);
}
static int client_content_size(struct lttng_ust_lib_ring_buffer *buf,
- struct lttng_ust_shm_handle *handle,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
uint64_t *content_size)
{
+ struct lttng_ust_shm_handle *handle = chan->handle;
struct packet_header *header;
header = client_packet_header(buf, handle);
}
static int client_packet_size(struct lttng_ust_lib_ring_buffer *buf,
- struct lttng_ust_shm_handle *handle,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
uint64_t *packet_size)
{
+ struct lttng_ust_shm_handle *handle = chan->handle;
struct packet_header *header;
header = client_packet_header(buf, handle);
}
static int client_stream_id(struct lttng_ust_lib_ring_buffer *buf,
- struct lttng_ust_shm_handle *handle,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
uint64_t *stream_id)
{
+ struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan);
+
+ *stream_id = lttng_chan->priv->id;
+
+ return 0;
+}
+
+static int client_current_timestamp(struct lttng_ust_lib_ring_buffer *buf,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
+ uint64_t *ts)
+{
+ *ts = client_ring_buffer_clock_read(chan);
+
+ return 0;
+}
+
+static int client_sequence_number(struct lttng_ust_lib_ring_buffer *buf,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
+ uint64_t *seq)
+{
+ struct lttng_ust_shm_handle *handle = chan->handle;
struct packet_header *header;
header = client_packet_header(buf, handle);
if (!header)
return -1;
- *stream_id = header->stream_id;
+ *seq = header->ctx.packet_seq_num;
return 0;
}
-static int client_current_timestamp(struct lttng_ust_lib_ring_buffer *buf,
- struct lttng_ust_shm_handle *handle,
- uint64_t *ts)
+static int client_instance_id(struct lttng_ust_lib_ring_buffer *buf,
+ struct lttng_ust_lib_ring_buffer_channel *chan,
+ uint64_t *id)
{
- struct channel *chan;
-
- chan = shmp(handle, handle->chan);
- *ts = client_ring_buffer_clock_read(chan);
+ *id = buf->backend.cpu;
return 0;
}
.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,
};
static const struct lttng_ust_lib_ring_buffer_config client_config = {
.cb_ptr = &client_cb.parent,
};
-const struct lttng_ust_client_lib_ring_buffer_client_cb *LTTNG_CLIENT_CALLBACKS = &client_cb;
-
static
-struct lttng_channel *_channel_create(const char *name,
+struct lttng_ust_channel_buffer *_channel_create(const char *name,
void *buf_addr,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
unsigned int read_timer_interval,
unsigned char *uuid,
uint32_t chan_id,
- const int *stream_fds, int nr_stream_fds)
+ const int *stream_fds, int nr_stream_fds,
+ int64_t blocking_timeout)
{
- struct lttng_channel chan_priv_init;
+ struct lttng_ust_abi_channel_config chan_priv_init;
struct lttng_ust_shm_handle *handle;
- struct lttng_channel *lttng_chan;
- void *priv;
+ struct lttng_ust_channel_buffer *lttng_chan_buf;
+
+ lttng_chan_buf = lttng_ust_alloc_channel_buffer();
+ if (!lttng_chan_buf)
+ return NULL;
+ memcpy(lttng_chan_buf->priv->uuid, uuid, LTTNG_UST_UUID_LEN);
+ lttng_chan_buf->priv->id = chan_id;
memset(&chan_priv_init, 0, sizeof(chan_priv_init));
memcpy(chan_priv_init.uuid, uuid, LTTNG_UST_UUID_LEN);
chan_priv_init.id = chan_id;
+
handle = channel_create(&client_config, name,
- &priv, __alignof__(struct lttng_channel),
- sizeof(struct lttng_channel),
+ __alignof__(struct lttng_ust_abi_channel_config),
+ sizeof(struct lttng_ust_abi_channel_config),
&chan_priv_init,
- buf_addr, subbuf_size, num_subbuf,
+ lttng_chan_buf, buf_addr, subbuf_size, num_subbuf,
switch_timer_interval, read_timer_interval,
- stream_fds, nr_stream_fds);
+ stream_fds, nr_stream_fds, blocking_timeout);
if (!handle)
- return NULL;
- lttng_chan = priv;
- lttng_chan->handle = handle;
- lttng_chan->chan = shmp(handle, handle->chan);
- return lttng_chan;
+ goto error;
+ lttng_chan_buf->priv->rb_chan = shmp(handle, handle->chan);
+ return lttng_chan_buf;
+
+error:
+ lttng_ust_free_channel_common(lttng_chan_buf->parent);
+ return NULL;
}
static
-void lttng_channel_destroy(struct lttng_channel *chan)
+void lttng_channel_destroy(struct lttng_ust_channel_buffer *lttng_chan_buf)
{
- channel_destroy(chan->chan, chan->handle, 1);
+ channel_destroy(lttng_chan_buf->priv->rb_chan, lttng_chan_buf->priv->rb_chan->handle, 1);
+ lttng_ust_free_channel_common(lttng_chan_buf->parent);
}
static
-int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx,
- uint32_t event_id)
-{
- struct lttng_channel *lttng_chan = channel_get_private(ctx->chan);
- int ret, cpu;
-
- cpu = lib_ring_buffer_get_cpu(&client_config);
- if (cpu < 0)
+int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx)
+{
+ struct lttng_ust_event_recorder *event_recorder = ctx->client_priv;
+ struct lttng_ust_channel_buffer *lttng_chan = event_recorder->chan;
+ struct lttng_client_ctx client_ctx;
+ int ret, nesting;
+ struct lttng_ust_lib_ring_buffer_ctx_private *private_ctx;
+ uint32_t event_id;
+
+ event_id = event_recorder->priv->id;
+ client_ctx.chan_ctx = lttng_ust_rcu_dereference(lttng_chan->priv->ctx);
+ client_ctx.event_ctx = lttng_ust_rcu_dereference(event_recorder->priv->ctx);
+ /* Compute internal size of context structures. */
+ ctx_get_struct_size(client_ctx.chan_ctx, &client_ctx.packet_context_len,
+ APP_CTX_ENABLED);
+ ctx_get_struct_size(client_ctx.event_ctx, &client_ctx.event_context_len,
+ APP_CTX_ENABLED);
+
+ nesting = lib_ring_buffer_nesting_inc(&client_config);
+ if (nesting < 0)
return -EPERM;
- ctx->cpu = cpu;
- switch (lttng_chan->header_type) {
+ private_ctx = &URCU_TLS(private_ctx_stack)[nesting];
+ memset(private_ctx, 0, sizeof(*private_ctx));
+ private_ctx->pub = ctx;
+ private_ctx->chan = lttng_chan->priv->rb_chan;
+
+ ctx->priv = private_ctx;
+
+ switch (lttng_chan->priv->header_type) {
case 1: /* compact */
if (event_id > 30)
- ctx->rflags |= LTTNG_RFLAG_EXTENDED;
+ private_ctx->rflags |= LTTNG_RFLAG_EXTENDED;
break;
case 2: /* large */
if (event_id > 65534)
- ctx->rflags |= LTTNG_RFLAG_EXTENDED;
+ private_ctx->rflags |= LTTNG_RFLAG_EXTENDED;
break;
default:
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 (caa_unlikely(ret))
goto put;
- lttng_write_event_header(&client_config, ctx, event_id);
+ if (lib_ring_buffer_backend_get_pages(&client_config, ctx,
+ &private_ctx->backend_pages)) {
+ ret = -EPERM;
+ goto put;
+ }
+ lttng_write_event_header(&client_config, ctx, &client_ctx, event_id);
return 0;
put:
- lib_ring_buffer_put_cpu(&client_config);
+ lib_ring_buffer_nesting_dec(&client_config);
return ret;
}
void lttng_event_commit(struct lttng_ust_lib_ring_buffer_ctx *ctx)
{
lib_ring_buffer_commit(&client_config, ctx);
- lib_ring_buffer_put_cpu(&client_config);
+ lib_ring_buffer_nesting_dec(&client_config);
}
static
-void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx, const void *src,
- size_t len)
+void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ const void *src, size_t len, size_t alignment)
{
+ lttng_ust_lib_ring_buffer_align_ctx(ctx, alignment);
lib_ring_buffer_write(&client_config, ctx, src, len);
}
static
-void lttng_event_strcpy(struct lttng_ust_lib_ring_buffer_ctx *ctx, const char *src,
- size_t len)
+void lttng_event_strcpy(struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ const char *src, size_t len)
{
lib_ring_buffer_strcpy(&client_config, ctx, src, len, '#');
}
-#if 0
static
-wait_queue_head_t *lttng_get_reader_wait_queue(struct channel *chan)
+void lttng_event_pstrcpy_pad(struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ const char *src, size_t len)
{
- return &chan->read_wait;
+ lib_ring_buffer_pstrcpy(&client_config, ctx, src, len, '\0');
}
static
-wait_queue_head_t *lttng_get_hp_wait_queue(struct channel *chan)
+int lttng_is_finalized(struct lttng_ust_channel_buffer *chan)
{
- return &chan->hp_wait;
-}
-#endif //0
+ struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan;
-static
-int lttng_is_finalized(struct channel *chan)
-{
- return lib_ring_buffer_channel_is_finalized(chan);
+ return lib_ring_buffer_channel_is_finalized(rb_chan);
}
static
-int lttng_is_disabled(struct channel *chan)
+int lttng_is_disabled(struct lttng_ust_channel_buffer *chan)
{
- return lib_ring_buffer_channel_is_disabled(chan);
+ struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan;
+
+ return lib_ring_buffer_channel_is_disabled(rb_chan);
}
static
-int lttng_flush_buffer(struct channel *chan, struct lttng_ust_shm_handle *handle)
+int lttng_flush_buffer(struct lttng_ust_channel_buffer *chan)
{
+ struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan;
struct lttng_ust_lib_ring_buffer *buf;
int cpu;
- for_each_channel_cpu(cpu, chan) {
+ for_each_channel_cpu(cpu, rb_chan) {
int shm_fd, wait_fd, wakeup_fd;
uint64_t memory_map_size;
- buf = channel_get_ring_buffer(&client_config, chan,
- cpu, handle, &shm_fd, &wait_fd,
+ buf = channel_get_ring_buffer(&client_config, rb_chan,
+ cpu, rb_chan->handle, &shm_fd, &wait_fd,
&wakeup_fd, &memory_map_size);
lib_ring_buffer_switch(&client_config, buf,
- SWITCH_ACTIVE, handle);
+ SWITCH_ACTIVE, rb_chan->handle);
}
return 0;
}
static struct lttng_transport lttng_relay_transport = {
.name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap",
.ops = {
- .channel_create = _channel_create,
- .channel_destroy = lttng_channel_destroy,
- .u.has_strcpy = 1,
+ .struct_size = sizeof(struct lttng_ust_channel_buffer_ops),
+ .priv = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_channel_buffer_ops_private, {
+ .pub = <tng_relay_transport.ops,
+ .channel_create = _channel_create,
+ .channel_destroy = lttng_channel_destroy,
+ .packet_avail_size = NULL, /* Would be racy anyway */
+ .is_finalized = lttng_is_finalized,
+ .is_disabled = lttng_is_disabled,
+ .flush_buffer = lttng_flush_buffer,
+ }),
.event_reserve = lttng_event_reserve,
.event_commit = lttng_event_commit,
.event_write = lttng_event_write,
- .packet_avail_size = NULL, /* Would be racy anyway */
- //.get_reader_wait_queue = lttng_get_reader_wait_queue,
- //.get_hp_wait_queue = lttng_get_hp_wait_queue,
- .is_finalized = lttng_is_finalized,
- .is_disabled = lttng_is_disabled,
- .flush_buffer = lttng_flush_buffer,
.event_strcpy = lttng_event_strcpy,
+ .event_pstrcpy_pad = lttng_event_pstrcpy_pad,
},
.client_config = &client_config,
};
projects / lttng-ust.git / blobdiff