X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=ltt-ring-buffer-metadata-client.h;h=529bbb19ffe72dce2897167b18bfaa781945e516;hb=edb5c2da83545004c5f556accb79d010a6b1e3a9;hp=43a711caa29c5da4ce4bbf7fea331c0eeeb4ed23;hpb=2db1399a47bc5a86dade078994cd1060d6d56f64;p=lttng-modules.git

diff --git a/ltt-ring-buffer-metadata-client.h b/ltt-ring-buffer-metadata-client.h
index 43a711ca..529bbb19 100644
--- a/ltt-ring-buffer-metadata-client.h
+++ b/ltt-ring-buffer-metadata-client.h
@@ -23,6 +23,8 @@ struct metadata_packet_header {
 	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];
 };
 
@@ -94,6 +96,8 @@ static void client_buffer_begin(struct lib_ring_buffer *buf, u64 tsc,
 	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;
 }
 
 /*
@@ -112,7 +116,11 @@ static void client_buffer_end(struct lib_ring_buffer *buf, u64 tsc,
 
 	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);
@@ -177,6 +185,20 @@ struct lib_ring_buffer *ltt_buffer_read_open(struct channel *chan)
 	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)
 {
@@ -202,6 +224,20 @@ void ltt_event_write(struct lib_ring_buffer_ctx *ctx, const void *src,
 	lib_ring_buffer_write(&client_config, ctx, src, len);
 }
 
+static
+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)
 			     
@@ -220,9 +256,11 @@ size_t ltt_packet_avail_size(struct channel *chan)
 }
 
 static
-wait_queue_head_t *ltt_get_reader_wait_queue(struct channel *chan)
+wait_queue_head_t *ltt_get_writer_buf_wait_queue(struct channel *chan, int cpu)
 {
-	return &chan->read_wait;
+	struct lib_ring_buffer *buf = channel_get_ring_buffer(&client_config,
+					chan, cpu);
+	return &buf->write_wait;
 }
 
 static
@@ -250,12 +288,16 @@ 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,
 		.packet_avail_size = ltt_packet_avail_size,
-		.get_reader_wait_queue = ltt_get_reader_wait_queue,
+		.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,