bioerr.bt

#!/usr/local/bin/bpftrace
/*
 * bioerr - Trace disk errors.
 *
 * See BPF Performance Tools, Chapter 9, for an explanation of this tool.
 *
 * Copyright (c) 2019 Brendan Gregg.
 * Licensed under the Apache License, Version 2.0 (the "License").
 * This was originally created for the BPF Performance Tools book
 * published by Addison Wesley. ISBN-13: 9780136554820
 * When copying or porting, include this comment.
 *
 * 19-Mar-2019  Brendan Gregg   Created this.
 */

BEGIN
{
	printf("Tracing block I/O errors. Hit Ctrl-C to end.\n");
}

tracepoint:block:block_rq_complete
/args->error != 0/
{
	time("%H:%M:%S ");
	printf("device: %d,%d, sector: %d, bytes: %d, flags: %s, error: %d\n",
	    args->dev >> 20, args->dev & ((1 << 20) - 1), args->sector,
	    args->nr_sector * 512, args->rwbs, args->error);
}