#include "lttng-events.h"
#include "lttng-tracer.h"
+static struct lttng_transport lttng_relay_transport;
+
struct metadata_packet_header {
uint32_t magic; /* 0x75D11D57 */
uint8_t uuid[16]; /* Unique Universal Identifier */
}
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 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 */
.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;
- lttng_chan->ops->current_timestamp = client_current_timestamp;
+ 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
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)
.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,
},
};