[Libguestfs] [PATCH nbdkit] log: Decode the extent type in output.
Eric Blake
eblake at redhat.com
Mon Apr 1 12:40:14 UTC 2019
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.
>
> 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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