struct metadata_packet_header {
uint32_t magic; /* 0x75D11D57 */
- uint8_t trace_uuid[16]; /* Unique Universal Identifier */
+ uint8_t uuid[16]; /* Unique Universal Identifier */
uint32_t checksum; /* 0 if unused */
uint32_t content_size; /* in bits */
uint32_t packet_size; /* in bits */
uint8_t compression_scheme; /* 0 if unused */
uint8_t encryption_scheme; /* 0 if unused */
uint8_t checksum_scheme; /* 0 if unused */
+ uint8_t major; /* CTF spec major version number */
+ uint8_t minor; /* CTF spec minor version number */
uint8_t header_end[0];
};
static inline
unsigned char record_header_size(const struct lib_ring_buffer_config *config,
struct channel *chan, size_t offset,
- size_t data_size, size_t *pre_header_padding,
- unsigned int rflags,
+ size_t *pre_header_padding,
struct lib_ring_buffer_ctx *ctx)
{
return 0;
static
size_t client_record_header_size(const struct lib_ring_buffer_config *config,
struct channel *chan, size_t offset,
- size_t data_size,
size_t *pre_header_padding,
- unsigned int rflags,
struct lib_ring_buffer_ctx *ctx)
{
return 0;
(struct metadata_packet_header *)
lib_ring_buffer_offset_address(&buf->backend,
subbuf_idx * chan->backend.subbuf_size);
+ struct ltt_channel *ltt_chan = channel_get_private(chan);
+ struct ltt_session *session = ltt_chan->session;
header->magic = TSDL_MAGIC_NUMBER;
- /* TODO */
- //header->trace_uuid = ; /* Unique Universal Identifier */
+ memcpy(header->uuid, session->uuid.b, sizeof(session->uuid));
header->checksum = 0; /* 0 if unused */
header->content_size = 0xFFFFFFFF; /* in bits, for debugging */
header->packet_size = 0xFFFFFFFF; /* in bits, for debugging */
header->compression_scheme = 0; /* 0 if unused */
header->encryption_scheme = 0; /* 0 if unused */
header->checksum_scheme = 0; /* 0 if unused */
+ header->major = CTF_SPEC_MAJOR;
+ header->minor = CTF_SPEC_MINOR;
}
/*
unsigned int subbuf_idx, unsigned long data_size)
{
struct channel *chan = buf->backend.chan;
- struct packet_header *header =
- (struct packet_header *)
+ struct metadata_packet_header *header =
+ (struct metadata_packet_header *)
lib_ring_buffer_offset_address(&buf->backend,
subbuf_idx * chan->backend.subbuf_size);
unsigned long records_lost = 0;
header->content_size = data_size * CHAR_BIT; /* in bits */
header->packet_size = PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
- records_lost += lib_ring_buffer_get_records_lost_full(&client_config, buf);
+ /*
+ * We do not care about the records lost count, because the metadata
+ * channel waits and retry.
+ */
+ (void) lib_ring_buffer_get_records_lost_full(&client_config, buf);
records_lost += lib_ring_buffer_get_records_lost_wrap(&client_config, buf);
records_lost += lib_ring_buffer_get_records_lost_big(&client_config, buf);
WARN_ON_ONCE(records_lost != 0);
.sync = RING_BUFFER_SYNC_GLOBAL,
.mode = RING_BUFFER_MODE_TEMPLATE,
.backend = RING_BUFFER_PAGE,
- .output = RING_BUFFER_SPLICE,
+ .output = RING_BUFFER_OUTPUT_TEMPLATE,
.oops = RING_BUFFER_OOPS_CONSISTENCY,
.ipi = RING_BUFFER_IPI_BARRIER,
.wakeup = RING_BUFFER_WAKEUP_BY_TIMER,
static
struct channel *_channel_create(const char *name,
- struct ltt_session *session, void *buf_addr,
+ struct ltt_channel *ltt_chan, void *buf_addr,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
unsigned int read_timer_interval)
{
- return channel_create(&client_config, name, session, buf_addr,
+ return channel_create(&client_config, name, ltt_chan, buf_addr,
subbuf_size, num_subbuf, switch_timer_interval,
read_timer_interval);
}
return NULL;
}
+static
+int ltt_buffer_has_read_closed_stream(struct channel *chan)
+{
+ struct lib_ring_buffer *buf;
+ int cpu;
+
+ for_each_channel_cpu(cpu, chan) {
+ buf = channel_get_ring_buffer(&client_config, chan, cpu);
+ if (!atomic_long_read(&buf->active_readers))
+ return 1;
+ }
+ return 0;
+}
+
static
void ltt_buffer_read_close(struct lib_ring_buffer *buf)
{
}
static
-int ltt_event_reserve(struct lib_ring_buffer_ctx *ctx)
+int ltt_event_reserve(struct lib_ring_buffer_ctx *ctx, uint32_t event_id)
{
return lib_ring_buffer_reserve(&client_config, ctx);
}
}
static
-wait_queue_head_t *ltt_get_reader_wait_queue(struct ltt_channel *chan)
+void ltt_event_write_from_user(struct lib_ring_buffer_ctx *ctx,
+ const void __user *src, size_t len)
+{
+ lib_ring_buffer_copy_from_user(&client_config, ctx, src, len);
+}
+
+static
+void ltt_event_memset(struct lib_ring_buffer_ctx *ctx,
+ int c, size_t len)
+{
+ lib_ring_buffer_memset(&client_config, ctx, c, len);
+}
+
+static
+size_t ltt_packet_avail_size(struct channel *chan)
+
+{
+ unsigned long o_begin;
+ struct lib_ring_buffer *buf;
+
+ buf = chan->backend.buf; /* Only for global buffer ! */
+ o_begin = v_read(&client_config, &buf->offset);
+ if (subbuf_offset(o_begin, chan) != 0) {
+ return chan->backend.subbuf_size - subbuf_offset(o_begin, chan);
+ } else {
+ return chan->backend.subbuf_size - subbuf_offset(o_begin, chan)
+ - sizeof(struct metadata_packet_header);
+ }
+}
+
+static
+wait_queue_head_t *ltt_get_writer_buf_wait_queue(struct channel *chan, int cpu)
+{
+ struct lib_ring_buffer *buf = channel_get_ring_buffer(&client_config,
+ chan, cpu);
+ return &buf->write_wait;
+}
+
+static
+wait_queue_head_t *ltt_get_hp_wait_queue(struct channel *chan)
+{
+ return &chan->hp_wait;
+}
+
+static
+int ltt_is_finalized(struct channel *chan)
+{
+ return lib_ring_buffer_channel_is_finalized(chan);
+}
+
+static
+int ltt_is_disabled(struct channel *chan)
{
- return &chan->chan->read_wait;
+ return lib_ring_buffer_channel_is_disabled(chan);
}
static struct ltt_transport ltt_relay_transport = {
.channel_create = _channel_create,
.channel_destroy = ltt_channel_destroy,
.buffer_read_open = ltt_buffer_read_open,
+ .buffer_has_read_closed_stream =
+ ltt_buffer_has_read_closed_stream,
.buffer_read_close = ltt_buffer_read_close,
.event_reserve = ltt_event_reserve,
.event_commit = ltt_event_commit,
+ .event_write_from_user = ltt_event_write_from_user,
+ .event_memset = ltt_event_memset,
.event_write = ltt_event_write,
- .get_reader_wait_queue = ltt_get_reader_wait_queue,
+ .packet_avail_size = ltt_packet_avail_size,
+ .get_writer_buf_wait_queue = ltt_get_writer_buf_wait_queue,
+ .get_hp_wait_queue = ltt_get_hp_wait_queue,
+ .is_finalized = ltt_is_finalized,
+ .is_disabled = ltt_is_disabled,
},
};
* vmalloc'd module pages when it is built as a module into LTTng.
*/
wrapper_vmalloc_sync_all();
- printk(KERN_INFO "LTT : ltt ring buffer metadata client init\n");
ltt_transport_register(<t_relay_transport);
return 0;
}
static void __exit ltt_ring_buffer_client_exit(void)
{
- printk(KERN_INFO "LTT : ltt ring buffer metadata client exit\n");
ltt_transport_unregister(<t_relay_transport);
}
projects / lttng-modules.git / blobdiff