/*
- * 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 <stddef.h>
#include <stdint.h>
#include <lttng/ust-events.h>
#include "lttng/bitfield.h"
}
static inline
-unsigned char record_header_size(const struct lttng_ust_lib_ring_buffer_config *config,
+size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config,
struct 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 0;
}
#include "../libringbuffer/api.h"
+#include "lttng-rb-clients.h"
static uint64_t client_ring_buffer_clock_read(struct channel *chan)
{
size_t client_record_header_size(const struct lttng_ust_lib_ring_buffer_config *config,
struct 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 0;
}
handle);
struct lttng_channel *lttng_chan = channel_get_private(chan);
+ assert(header);
+ if (!header)
+ return;
header->magic = TSDL_MAGIC_NUMBER;
memcpy(header->uuid, lttng_chan->uuid, sizeof(lttng_chan->uuid));
header->checksum = 0; /* 0 if unused */
header->checksum_scheme = 0; /* 0 if unused */
header->major = CTF_SPEC_MAJOR;
header->minor = CTF_SPEC_MINOR;
-
}
/*
handle);
unsigned long records_lost = 0;
+ assert(header);
+ if (!header)
+ return;
header->content_size = data_size * CHAR_BIT; /* in bits */
- header->packet_size = PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
+ header->packet_size = LTTNG_UST_PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
/*
* We do not care about the records lost count, because the metadata
* channel waits and retry.
{
}
+static const
+struct lttng_ust_client_lib_ring_buffer_client_cb client_cb = {
+ .parent = {
+ .ring_buffer_clock_read = client_ring_buffer_clock_read,
+ .record_header_size = client_record_header_size,
+ .subbuffer_header_size = client_packet_header_size,
+ .buffer_begin = client_buffer_begin,
+ .buffer_end = client_buffer_end,
+ .buffer_create = client_buffer_create,
+ .buffer_finalize = client_buffer_finalize,
+ },
+};
+
static const struct lttng_ust_lib_ring_buffer_config client_config = {
.cb.ring_buffer_clock_read = client_ring_buffer_clock_read,
.cb.record_header_size = client_record_header_size,
.ipi = RING_BUFFER_NO_IPI_BARRIER,
.wakeup = RING_BUFFER_WAKEUP_BY_WRITER,
.client_type = LTTNG_CLIENT_TYPE,
+
+ .cb_ptr = &client_cb.parent,
};
-const struct lttng_ust_lib_ring_buffer_client_cb *LTTNG_CLIENT_CALLBACKS = &client_config.cb;
+const struct lttng_ust_client_lib_ring_buffer_client_cb *LTTNG_CLIENT_CALLBACKS = &client_cb;
static
struct lttng_channel *_channel_create(const char *name,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
unsigned int read_timer_interval,
- int **shm_fd, int **wait_fd,
- uint64_t **memory_map_size,
- struct lttng_channel *chan_priv_init)
+ unsigned char *uuid,
+ uint32_t chan_id,
+ const int *stream_fds, int nr_stream_fds,
+ int64_t blocking_timeout)
{
- void *priv;
- struct lttng_channel *lttng_chan = NULL;
+ struct lttng_channel chan_priv_init;
struct lttng_ust_shm_handle *handle;
+ struct lttng_channel *lttng_chan;
+ void *priv;
+ 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__(*lttng_chan), sizeof(*lttng_chan),
- chan_priv_init,
+ &priv, __alignof__(struct lttng_channel),
+ sizeof(struct lttng_channel),
+ &chan_priv_init,
buf_addr, subbuf_size, num_subbuf,
switch_timer_interval, read_timer_interval,
- shm_fd, wait_fd, memory_map_size);
+ stream_fds, nr_stream_fds, blocking_timeout);
if (!handle)
return NULL;
lttng_chan = priv;
lttng_chan->handle = handle;
- lttng_chan->chan = shmp(lttng_chan->handle, lttng_chan->handle->chan);
+ lttng_chan->chan = shmp(handle, handle->chan);
return lttng_chan;
}
static
-void lttng_channel_destroy(struct lttng_channel *lttng_chan)
+void lttng_channel_destroy(struct lttng_channel *chan)
{
- channel_destroy(lttng_chan->chan, lttng_chan->handle, 0);
-}
-
-static
-struct lttng_ust_lib_ring_buffer *lttng_buffer_read_open(struct channel *chan,
- struct lttng_ust_shm_handle *handle,
- int **shm_fd, int **wait_fd,
- uint64_t **memory_map_size)
-{
- struct lttng_ust_lib_ring_buffer *buf;
-
- buf = channel_get_ring_buffer(&client_config, chan,
- 0, handle, shm_fd, wait_fd, memory_map_size);
- if (!lib_ring_buffer_open_read(buf, handle, 0))
- return buf;
- return NULL;
-}
-
-static
-void lttng_buffer_read_close(struct lttng_ust_lib_ring_buffer *buf,
- struct lttng_ust_shm_handle *handle)
-{
- lib_ring_buffer_release_read(buf, handle, 0);
+ channel_destroy(chan->chan, chan->handle, 1);
}
static
int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx, uint32_t event_id)
{
- return lib_ring_buffer_reserve(&client_config, ctx);
+ int ret;
+
+ ret = lib_ring_buffer_reserve(&client_config, ctx, NULL);
+ if (ret)
+ return ret;
+ if (caa_likely(ctx->ctx_len
+ >= sizeof(struct lttng_ust_lib_ring_buffer_ctx))) {
+ if (lib_ring_buffer_backend_get_pages(&client_config, ctx,
+ &ctx->backend_pages))
+ return -EPERM;
+ }
+ return 0;
}
static
static
size_t lttng_packet_avail_size(struct channel *chan, struct lttng_ust_shm_handle *handle)
-
{
unsigned long o_begin;
struct lttng_ust_lib_ring_buffer *buf;
int lttng_flush_buffer(struct channel *chan, struct lttng_ust_shm_handle *handle)
{
struct lttng_ust_lib_ring_buffer *buf;
- int *shm_fd, *wait_fd;
- uint64_t *memory_map_size;
+ int shm_fd, wait_fd, wakeup_fd;
+ uint64_t memory_map_size;
buf = channel_get_ring_buffer(&client_config, chan,
- 0, handle, &shm_fd, &wait_fd,
+ 0, handle, &shm_fd, &wait_fd, &wakeup_fd,
&memory_map_size);
lib_ring_buffer_switch(&client_config, buf,
SWITCH_ACTIVE, handle);
.ops = {
.channel_create = _channel_create,
.channel_destroy = lttng_channel_destroy,
- .buffer_read_open = lttng_buffer_read_open,
- .buffer_read_close = lttng_buffer_read_close,
.event_reserve = lttng_event_reserve,
.event_commit = lttng_event_commit,
.event_write = lttng_event_write,
.is_disabled = lttng_is_disabled,
.flush_buffer = lttng_flush_buffer,
},
+ .client_config = &client_config,
};
void RING_BUFFER_MODE_TEMPLATE_INIT(void)
{
- DBG("LTT : ltt ring buffer client init\n");
+ DBG("LTT : ltt ring buffer client \"%s\" init\n",
+ "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap");
lttng_transport_register(<tng_relay_transport);
}
void RING_BUFFER_MODE_TEMPLATE_EXIT(void)
{
- DBG("LTT : ltt ring buffer client exit\n");
+ DBG("LTT : ltt ring buffer client \"%s\" exit\n",
+ "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap");
lttng_transport_unregister(<tng_relay_transport);
}
projects / lttng-ust.git / blobdiff