Add a packet sequence number

[lttng-modules.git] / lttng-abi.c

diff --git a/lttng-abi.c b/lttng-abi.c
index 93cdce3e0f00ec37e007ae17a54bce290ee035df..586116dae39f6f5f50726191d90951d029bbea7e 100644 (file)
--- a/lttng-abi.c
+++ b/lttng-abi.c
@@ -622,9 +622,11 @@ unsigned int lttng_metadata_ring_buffer_poll(struct file *filp,
                if (finalized)
                        mask |= POLLHUP;
 
+               mutex_lock(&stream->metadata_cache->lock);
                if (stream->metadata_cache->metadata_written >
                                stream->metadata_out)
                        mask |= POLLIN;
+               mutex_unlock(&stream->metadata_cache->lock);
        }
 
        return mask;
@@ -922,7 +924,6 @@ int lttng_abi_open_metadata_stream(struct file *channel_file)
        metadata_stream->priv = buf;
        stream_priv = metadata_stream;
        metadata_stream->transport = channel->transport;
-       mutex_init(&metadata_stream->lock);
 
        /*
         * Since life-time of metadata cache differs from that of
@@ -1507,6 +1508,15 @@ static long lttng_stream_ring_buffer_ioctl(struct file *filp,
                        goto error;
                return put_u64(ts, arg);
        }
+       case LTTNG_RING_BUFFER_GET_SEQ_NUM:
+       {
+               uint64_t seq;
+
+               ret = ops->sequence_number(config, buf, &seq);
+               if (ret < 0)
+                       goto error;
+               return put_u64(seq, arg);
+       }
        default:
                return lib_ring_buffer_file_operations.unlocked_ioctl(filp,
                                cmd, arg);
@@ -1593,6 +1603,15 @@ static long lttng_stream_ring_buffer_compat_ioctl(struct file *filp,
                        goto error;
                return put_u64(ts, arg);
        }
+       case LTTNG_RING_BUFFER_COMPAT_GET_SEQ_NUM:
+       {
+               uint64_t seq;
+
+               ret = ops->sequence_number(config, buf, &seq);
+               if (ret < 0)
+                       goto error;
+               return put_u64(seq, arg);
+       }
        default:
                return lib_ring_buffer_file_operations.compat_ioctl(filp,
                                cmd, arg);