#include <lttng-abi-old.h>
#include <lttng-events.h>
#include <lttng-tracer.h>
+#include <lttng-tp-mempool.h>
#include <lib/ringbuffer/frontend_types.h>
/*
stream->metadata_out = stream->metadata_in;
}
+/*
+ * Reset the counter of how much metadata has been consumed to 0. That way,
+ * the consumer receives the content of the metadata cache unchanged. This is
+ * different from the metadata_regenerate where the offset from epoch is
+ * resampled, here we want the exact same content as the last time the metadata
+ * was generated. This command is only possible if all the metadata written
+ * in the cache has been output to the metadata stream to avoid corrupting the
+ * metadata file.
+ *
+ * Return 0 on success, a negative value on error.
+ */
+static
+int lttng_metadata_cache_dump(struct lttng_metadata_stream *stream)
+{
+ int ret;
+ struct lttng_metadata_cache *cache = stream->metadata_cache;
+
+ mutex_lock(&cache->lock);
+ if (stream->metadata_out != cache->metadata_written) {
+ ret = -EBUSY;
+ goto end;
+ }
+ stream->metadata_out = 0;
+ stream->metadata_in = 0;
+ wake_up_interruptible(&stream->read_wait);
+ ret = 0;
+
+end:
+ mutex_unlock(&cache->lock);
+ return ret;
+}
+
static
long lttng_metadata_ring_buffer_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg)
return put_u64(stream->version, arg);
}
+ case RING_BUFFER_METADATA_CACHE_DUMP:
+ {
+ struct lttng_metadata_stream *stream = filp->private_data;
+
+ return lttng_metadata_cache_dump(stream);
+ }
default:
break;
}
return put_u64(stream->version, arg);
}
+ case RING_BUFFER_METADATA_CACHE_DUMP:
+ {
+ struct lttng_metadata_stream *stream = filp->private_data;
+
+ return lttng_metadata_cache_dump(stream);
+ }
default:
break;
}
wrapper_vmalloc_sync_all();
lttng_clock_ref();
+
+ ret = lttng_tp_mempool_init();
+ if (ret) {
+ goto error;
+ }
+
lttng_proc_dentry = proc_create_data("lttng", S_IRUSR | S_IWUSR, NULL,
<tng_fops, NULL);
return 0;
error:
+ lttng_tp_mempool_destroy();
lttng_clock_unref();
return ret;
}
/* No __exit annotation because used by init error path too. */
void lttng_abi_exit(void)
{
+ lttng_tp_mempool_destroy();
lttng_clock_unref();
if (lttng_proc_dentry)
remove_proc_entry("lttng", NULL);