On Mon, Apr 01, 2019 at 07:40:14AM -0500, Eric Blake wrote:
On 4/1/19 6:53 AM, Richard W.M. Jones wrote:
Instead of printing something like ‘type=0’ or ‘type=3’, this changes
the output to show the hole and zero flags separately.  For example:

  $ ./nbdkit -U - --filter=log sh - logfile=/dev/stdout \
      --run 'qemu-img map $nbd' <<'EOF'
  case "$1" in
     get_size) echo 1M ;;
     pread) dd if=/dev/zero count=$3 iflag=count_bytes ;;
     can_extents) exit 0 ;;
     extents)
         echo "0   32K    zero"
         echo "32K 32K    hole,zero"
         echo "64K 983040 "
         ;;
     *) exit 2 ;;
  esac
  EOF
  [...]
  2019-04-01 11:49:40.818357 connection=1 Extents id=2 offset=0x0 
count=0x100000 req_one=1 ...
  2019-04-01 11:49:40.819848 connection=1 ...Extents id=2 extents=[{ 
offset=0x0, length=0x8000, hole=0, zero=1 }, { offset=0x8000, length=0x8000, 
hole=1, zero=1 }, { offset=0x10000, length=0xf0000, hole=0, zero=0 }] return=0

Updates commit ed868b00f192cd72e91265e4fcdf3c3fbe8b7613.

Yes, that's nicer.


Even nicer than what I thought of.


Thanks: Martin Kletzander
---
 filters/log/log.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)


--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org





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