fix wrong offset and length for verification type without header

[onkrasnov]

fix wrong offset and length for verification type without header

During a pattern verification error, 'hdr' points the beginning of a block filled with a pattern and error log has incorrect values.

Signed-off-by: Oleg Krasnov [email protected]

[vincentkfu]

Before patch:

root@localhost:~/fio-dev/fio-canonical# ./fio --name=test --filesize=512 --bs=512 --verify_pattern=1 --verify=pattern --rw=write
test: (g=0): rw=write, bs=(R) 512B-512B, (W) 512B-512B, (T) 512B-512B, ioengine=psync, iodepth=1
fio-3.36-51-g90a0
Starting 1 process

test: (groupid=0, jobs=1): err= 0: pid=225392: Thu Feb  8 19:36:11 2024
  read: IOPS=1000, BW=500KiB/s (512kB/s)(512B/1msec)
    clat (nsec): min=22305, max=22305, avg=22305.00, stdev= 0.00
     lat (nsec): min=22567, max=22567, avg=22567.00, stdev= 0.00
    clat percentiles (nsec):
     |  1.00th=[22400],  5.00th=[22400], 10.00th=[22400], 20.00th=[22400],
     | 30.00th=[22400], 40.00th=[22400], 50.00th=[22400], 60.00th=[22400],
     | 70.00th=[22400], 80.00th=[22400], 90.00th=[22400], 95.00th=[22400],
     | 99.00th=[22400], 99.50th=[22400], 99.90th=[22400], 99.95th=[22400],
     | 99.99th=[22400]
  write: IOPS=500, BW=250KiB/s (256kB/s)(512B/2msec); 0 zone resets
    clat (nsec): min=984386, max=984386, avg=984386.00, stdev= 0.00
     lat (nsec): min=1018.6k, max=1018.6k, avg=1018602.00, stdev= 0.00
    clat percentiles (usec):
     |  1.00th=[  988],  5.00th=[  988], 10.00th=[  988], 20.00th=[  988],
     | 30.00th=[  988], 40.00th=[  988], 50.00th=[  988], 60.00th=[  988],
     | 70.00th=[  988], 80.00th=[  988], 90.00th=[  988], 95.00th=[  988],
     | 99.00th=[  988], 99.50th=[  988], 99.90th=[  988], 99.95th=[  988],
     | 99.99th=[  988]
  lat (usec)   : 50=50.00%, 1000=50.00%
  cpu          : usr=0.00%, sys=0.00%, ctx=2, majf=0, minf=13
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=1,1,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=500KiB/s (512kB/s), 500KiB/s-500KiB/s (512kB/s-512kB/s), io=512B (512B), run=1-1msec
  WRITE: bw=250KiB/s (256kB/s), 250KiB/s-250KiB/s (256kB/s-256kB/s), io=512B (512B), run=2-2msec

Disk stats (read/write):
  sda: ios=0/0, sectors=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
root@localhost:~/fio-dev/fio-canonical# ./fio --name=test --filesize=512 --bs=512 --verify_pattern=0 --verify=pattern
test: (g=0): rw=read, bs=(R) 512B-512B, (W) 512B-512B, (T) 512B-512B, ioengine=psync, iodepth=1
fio-3.36-51-g90a0
Starting 1 process
fio: got pattern '01', wanted '00'. Bad bits 1
fio: bad pattern block offset 0
pattern: verify failed at file test.0.0 offset 0, length 16843009 (requested block: offset=0, length=512, flags=8)
fio: verify type mismatch (257 media, 18 given)
fio: pid=225398, err=84/file:io_u.c:2175, func=io_u_sync_complete, error=Invalid or incomplete multibyte or wide character

test: (groupid=0, jobs=1): err=84 (file:io_u.c:2175, func=io_u_sync_complete, error=Invalid or incomplete multibyte or wide character): pid=225398: Thu Feb  8 19:36:20 2024
  read: IOPS=500, BW=250KiB/s (256kB/s)(512B/2msec)
    clat (nsec): min=722066, max=722066, avg=722066.00, stdev= 0.00
     lat (nsec): min=722836, max=722836, avg=722836.00, stdev= 0.00
    clat percentiles (usec):
     |  1.00th=[  725],  5.00th=[  725], 10.00th=[  725], 20.00th=[  725],
     | 30.00th=[  725], 40.00th=[  725], 50.00th=[  725], 60.00th=[  725],
     | 70.00th=[  725], 80.00th=[  725], 90.00th=[  725], 95.00th=[  725],
     | 99.00th=[  725], 99.50th=[  725], 99.90th=[  725], 99.95th=[  725],
     | 99.99th=[  725]
  lat (usec)   : 750=100.00%
  cpu          : usr=0.00%, sys=0.00%, ctx=1, majf=0, minf=20
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=50.0%, 4=50.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=1,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=250KiB/s (256kB/s), 250KiB/s-250KiB/s (256kB/s-256kB/s), io=512B (512B), run=2-2msec

Disk stats (read/write):
  sda: ios=0/0, sectors=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%

The error message has a garbage length 16843009.

With the patch:

root@localhost:~/fio-dev/fio-1709# ./fio --name=test --filesize=512 --bs=512 --verify_pattern=0 --verify=pattern
test: (g=0): rw=read, bs=(R) 512B-512B, (W) 512B-512B, (T) 512B-512B, ioengine=psync, iodepth=1
fio-3.36-54-g9c8b9
Starting 1 process
fio: got pattern '01', wanted '00'. Bad bits 1
fio: bad pattern block offset 0
pattern: verify failed at file test.0.0 offset 0, length 512 (requested block: offset=0, length=512, flags=8)
fio: verify type mismatch (257 media, 18 given)
fio: pid=228517, err=84/file:io_u.c:2175, func=io_u_sync_complete, error=Invalid or incomplete multibyte or wide character

test: (groupid=0, jobs=1): err=84 (file:io_u.c:2175, func=io_u_sync_complete, error=Invalid or incomplete multibyte or wide character): pid=228517: Thu Feb  8 19:44:59 2024
  read: IOPS=500, BW=250KiB/s (256kB/s)(512B/2msec)
    clat (nsec): min=746308, max=746308, avg=746308.00, stdev= 0.00
     lat (nsec): min=747518, max=747518, avg=747518.00, stdev= 0.00
    clat percentiles (usec):
     |  1.00th=[  750],  5.00th=[  750], 10.00th=[  750], 20.00th=[  750],
     | 30.00th=[  750], 40.00th=[  750], 50.00th=[  750], 60.00th=[  750],
     | 70.00th=[  750], 80.00th=[  750], 90.00th=[  750], 95.00th=[  750],
     | 99.00th=[  750], 99.50th=[  750], 99.90th=[  750], 99.95th=[  750],
     | 99.99th=[  750]
  lat (usec)   : 750=100.00%
  cpu          : usr=0.00%, sys=0.00%, ctx=1, majf=0, minf=22
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=50.0%, 4=50.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=1,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=250KiB/s (256kB/s), 250KiB/s-250KiB/s (256kB/s-256kB/s), io=512B (512B), run=2-2msec

Disk stats (read/write):
  sda: ios=0/0, sectors=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%

The error message has length 512