Send indexes in streaming mode

[lttng-tools.git] / src / common / kernel-consumer / kernel-consumer.c

diff --git a/src/common/kernel-consumer/kernel-consumer.c b/src/common/kernel-consumer/kernel-consumer.c
index eaccce3d0df294815be8289ec6983deea3c7f042..315af2eb86e540900ad08496b6b0cff83fef4804 100644 (file)
--- a/src/common/kernel-consumer/kernel-consumer.c
+++ b/src/common/kernel-consumer/kernel-consumer.c
@@ -907,18 +907,13 @@ ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
                struct lttng_consumer_local_data *ctx)
 {
        unsigned long len, subbuf_size, padding;
-       int err, write_index = 0;
+       int err, write_index = 1;
        ssize_t ret = 0;
        int infd = stream->wait_fd;
        struct lttng_packet_index index;
 
        DBG("In read_subbuffer (infd : %d)", infd);
 
-       /* Indicate that for this stream we have to write the index. */
-       if (stream->index_fd >= 0) {
-               write_index = 1;
-       }
-
        /* Get the next subbuffer */
        err = kernctl_get_next_subbuf(infd);
        if (err != 0) {
@@ -942,11 +937,13 @@ ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
                goto end;
        }
 
-       if (!stream->metadata_flag && write_index) {
+       if (!stream->metadata_flag) {
                ret = get_index_values(&index, infd);
                if (ret < 0) {
                        goto end;
                }
+       } else {
+               write_index = 0;
        }
 
        switch (stream->chan->output) {
@@ -1028,12 +1025,13 @@ ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
        }
 
        /* Write index if needed. */
-       if (write_index) {
-               err = index_write(stream->index_fd, &index, sizeof(index));
-               if (err < 0) {
-                       ret = -1;
-                       goto end;
-               }
+       if (!write_index) {
+               goto end;
+       }
+
+       err = consumer_stream_write_index(stream, &index);
+       if (err < 0) {
+               goto end;
        }
 
 end: