consumerd: move rotation logic to domain-agnostic read path

[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 7032a7f7ffcc9bea224db0c6059f1928de72aa47..4a2e4e07d7c0b8e5eac8e34927afad5f8762da4a 100644 (file)
--- a/src/common/kernel-consumer/kernel-consumer.c
+++ b/src/common/kernel-consumer/kernel-consumer.c
@@ -1590,26 +1590,14 @@ 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 = 1, rotation_ret;
+       int err, write_index = 1;
        ssize_t ret = 0;
        int infd = stream->wait_fd;
        struct ctf_packet_index index = {};
+       bool in_error_state = false;
 
        DBG("In read_subbuffer (infd : %d)", infd);
 
-       /*
-        * If the stream was flagged to be ready for rotation before we extract the
-        * next packet, rotate it now.
-        */
-       if (stream->rotate_ready) {
-               DBG("Rotate stream before extracting data");
-               rotation_ret = lttng_consumer_rotate_stream(ctx, stream);
-               if (rotation_ret < 0) {
-                       ERR("Stream rotation error");
-                       ret = -1;
-                       goto error;
-               }
-       }
 
        /* Get the next subbuffer */
        err = kernctl_get_next_subbuf(infd);
@@ -1795,11 +1783,13 @@ error_put_subbuf:
                }
                ret = err;
                goto error;
+       } else if (in_error_state) {
+               goto error;
        }
 
        /* Write index if needed. */
        if (!write_index) {
-               goto rotate;
+               goto end;
        }
 
        if (stream->chan->live_timer_interval && !stream->metadata_flag) {
@@ -1832,25 +1822,7 @@ error_put_subbuf:
                goto error;
        }
 
-rotate:
-       /*
-        * After extracting the packet, we check if the stream is now ready to be
-        * rotated and perform the action immediately.
-        */
-       rotation_ret = lttng_consumer_stream_is_rotate_ready(stream);
-       if (rotation_ret == 1) {
-               rotation_ret = lttng_consumer_rotate_stream(ctx, stream);
-               if (rotation_ret < 0) {
-                       ERR("Stream rotation error");
-                       ret = -1;
-                       goto error;
-               }
-       } else if (rotation_ret < 0) {
-               ERR("Checking if stream is ready to rotate");
-               ret = -1;
-               goto error;
-       }
-
+end:
 error:
        return ret;
 }