-/*
+/* 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 "wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */
-#include "lttng-events.h"
-#include "lttng-tracer.h"
+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
+#include <lttng/events.h>
+#include <lttng/tracer.h>
+
+static struct lttng_transport lttng_relay_transport;
struct metadata_packet_header {
uint32_t magic; /* 0x75D11D57 */
}
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,
+ void *client_ctx)
{
return 0;
}
-#include "wrapper/ringbuffer/api.h"
+#include <ringbuffer/api.h>
static u64 client_ring_buffer_clock_read(struct channel *chan)
{
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 0;
}
(struct metadata_packet_header *)
lib_ring_buffer_offset_address(&buf->backend,
subbuf_idx * chan->backend.subbuf_size);
- struct lttng_channel *lttng_chan = channel_get_private(chan);
- struct lttng_session *session = lttng_chan->session;
+ struct lttng_metadata_cache *metadata_cache =
+ channel_get_private(chan);
header->magic = TSDL_MAGIC_NUMBER;
- memcpy(header->uuid, session->uuid.b, sizeof(session->uuid));
+ memcpy(header->uuid, metadata_cache->uuid.b,
+ sizeof(metadata_cache->uuid));
header->checksum = 0; /* 0 if unused */
header->content_size = 0xFFFFFFFF; /* in bits, for debugging */
header->packet_size = 0xFFFFFFFF; /* in bits, for debugging */
return -ENOSYS;
}
+static int client_current_timestamp(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *bufb,
+ uint64_t *ts)
+{
+ return -ENOSYS;
+}
+
static int client_content_size(const struct lib_ring_buffer_config *config,
struct lib_ring_buffer *bufb,
uint64_t *content_size)
return -ENOSYS;
}
+static int client_sequence_number(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *bufb,
+ uint64_t *seq)
+{
+ return -ENOSYS;
+}
+
+static
+int client_instance_id(const struct lib_ring_buffer_config *config,
+ struct lib_ring_buffer *bufb,
+ uint64_t *id)
+{
+ return -ENOSYS;
+}
+
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,
.wakeup = RING_BUFFER_WAKEUP_BY_TIMER,
};
+static
+void release_priv_ops(void *priv_ops)
+{
+ module_put(THIS_MODULE);
+}
+
+static
+void lttng_channel_destroy(struct channel *chan)
+{
+ channel_destroy(chan);
+}
+
static
struct channel *_channel_create(const char *name,
struct lttng_channel *lttng_chan, void *buf_addr,
unsigned int switch_timer_interval,
unsigned int read_timer_interval)
{
- lttng_chan->ops->timestamp_begin = client_timestamp_begin;
- lttng_chan->ops->timestamp_end = client_timestamp_end;
- lttng_chan->ops->events_discarded = client_events_discarded;
- lttng_chan->ops->content_size = client_content_size;
- lttng_chan->ops->packet_size = client_packet_size;
- lttng_chan->ops->stream_id = client_stream_id;
+ struct channel *chan;
- return channel_create(&client_config, name, lttng_chan, buf_addr,
+ chan = channel_create(&client_config, name,
+ lttng_chan->session->metadata_cache, buf_addr,
subbuf_size, num_subbuf, switch_timer_interval,
read_timer_interval);
-}
+ if (chan) {
+ /*
+ * Ensure this module is not unloaded before we finish
+ * using lttng_relay_transport.ops.
+ */
+ if (!try_module_get(THIS_MODULE)) {
+ printk(KERN_WARNING "LTT : Can't lock transport module.\n");
+ goto error;
+ }
+ chan->backend.priv_ops = <tng_relay_transport.ops;
+ chan->backend.release_priv_ops = release_priv_ops;
+ }
+ return chan;
-static
-void lttng_channel_destroy(struct channel *chan)
-{
- channel_destroy(chan);
+error:
+ lttng_channel_destroy(chan);
+ return NULL;
}
static
static
int lttng_event_reserve(struct 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;
+ lib_ring_buffer_backend_get_pages(&client_config, ctx,
+ &ctx->backend_pages);
+ return 0;
+
}
static
lib_ring_buffer_memset(&client_config, ctx, c, len);
}
+static
+void lttng_event_strcpy(struct lib_ring_buffer_ctx *ctx, const char *src,
+ size_t len)
+{
+ lib_ring_buffer_strcpy(&client_config, ctx, src, len, '#');
+}
+
static
size_t lttng_packet_avail_size(struct channel *chan)
-
{
unsigned long o_begin;
struct lib_ring_buffer *buf;
.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,
},
};
* 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