[Libguestfs] Re: copy tests failing in libnbd with ZoL

"Richard W.M. Jones" <rjones(a)redhat.com&gt; writes: Sure thing. The contents of the logs of the synchronous version are: + requires cmp --version + requires truncate --version + requires stat --version + requires test -r /dev/zero + inp=copy-allocated-destination-zero-synch.in + out=copy-allocated-destination-zero-synch.out + cleanup_fn rm -f copy-allocated-destination-zero-synch.in copy-allocated-destination-zero-synch.out + local _hook=_cleanup_hook0 + declare -ag _cleanup_hook0 + eval '_cleanup_hook0=("$@")' ++ _cleanup_hook0=("$@") + rm -f copy-allocated-destination-zero-synch.in copy-allocated-destination-zero-synch.out + truncate -s 33554432 copy-allocated-destination-zero-synch.out + truncate -r copy-allocated-destination-zero-synch.out copy-allocated-destination-zero-synch.in + nbdcopy --allocated --destination-is-zero --synchronous --request-size=32K copy-allocated-destination-zero-synch.in copy-allocated-destination-zero-synch.out libnbd: debug: nbd1: nbd_create: allocated the handle (9134 bytes) libnbd: debug: nbd1: nbd_is_uri: enter: uri="copy-allocated-destination-zero-synch.in" libnbd: debug: nbd1: nbd_is_uri: leave: ret=0 libnbd: debug: nbd1: nbd_close: closing handle libnbd: debug: nbd2: nbd_create: allocated the handle (9134 bytes) libnbd: debug: nbd2: nbd_is_uri: enter: uri="copy-allocated-destination-zero-synch.out" libnbd: debug: nbd2: nbd_is_uri: leave: ret=0 libnbd: debug: nbd2: nbd_close: closing handle + echo Output: Output: + ls -lsh copy-allocated-destination-zero-synch.out 512 -rw-r--r-- 1 portage portage 32M Oct 23 13:49 copy-allocated-destination-zero-synch.out ++ stat -c %s copy-allocated-destination-zero-synch.out + size=33554432 ++ stat -c %b copy-allocated-destination-zero-synch.out + balloc=1 ++ stat -c %B copy-allocated-destination-zero-synch.out + bsize=512 + alloc=512 + '[' 33554432 -ne 33554432 ']' + '[' 512 -ne 33554432 ']' + echo '/var/tmp/portage/sys-libs/libnbd-1.23.9/work/libnbd-1.23.9/copy/copy-allocated-destination-zero-synch.sh: allocated size is not 32M' /var/tmp/portage/sys-libs/libnbd-1.23.9/work/libnbd-1.23.9/copy/copy-allocated-destination-zero-synch.sh: allocated size is not 32M + exit 1 + _run_cleanup_hooks + local _status=1 _i + set +e + trap '' INT QUIT TERM EXIT ERR + echo /var/tmp/portage/sys-libs/libnbd-1.23.9/work/libnbd-1.23.9/copy/copy-allocated-destination-zero-synch.sh: run cleanup hooks: exit code 1 /var/tmp/portage/sys-libs/libnbd-1.23.9/work/libnbd-1.23.9/copy/copy-allocated-destination-zero-synch.sh: run cleanup hooks: exit code 1 + (( _i = 0 )) + (( _i < 1 )) + eval '"${_cleanup_hook0[@]}"' ++ rm -f copy-allocated-destination-zero-synch.in copy-allocated-destination-zero-synch.out + (( ++_i )) + (( _i < 1 )) + exit 1 FAIL copy-allocated-destination-zero-synch.sh (exit status: 1) I suspect you might find the following interesting: $ truncate -s 33554432 copy-allocated-destination-zero-synch.out $ truncate -r copy-allocated-destination-zero-synch.out copy-allocated-destination-zero-synch.in $ ls -lsh copy* 512 -rw-r--r-- 1 arsen arsen 32M Oct 23 15:10 copy-allocated-destination-zero-synch.in 512 -rw-r--r-- 1 arsen arsen 32M Oct 23 15:10 copy-allocated-destination-zero-synch.out $ sudo /var/tmp/portage/sys-libs/libnbd-1.23.9/work/libnbd-1.23.9/copy/nbdcopy --allocated --destination-is-zero --synchronous --request-size=32K copy-allocated-destination-zero-synch.in copy-allocated-destination-zero-synch.out $ ls -lsh copy* 512 -rw-r--r-- 1 arsen arsen 32M Oct 23 15:13 copy-allocated-destination-zero-synch.in 512 -rw-r--r-- 1 arsen arsen 32M Oct 23 15:13 copy-allocated-destination-zero-synch.out (forgive the 'sudo', portage has a strict umask so I can't access that path from my user) On tmpfs, I get the following instead: /tmp/foo$ ls -lsh * 0 -rw-r--r-- 1 arsen arsen 32M Oct 23 15:12 copy-allocated-destination-zero-synch.in 0 -rw-r--r-- 1 arsen arsen 32M Oct 23 15:12 copy-allocated-destination-zero-synch.out ... and, after running nbdcopy: /tmp/foo$ ls -lsh * 0 -rw-r--r-- 1 arsen arsen 32M Oct 23 13:58 copy-allocated-destination-zero-synch.in 32M -rw-r--r-- 1 arsen arsen 32M Oct 23 13:59 copy-allocated-destination-zero-synch.out -- Arsen Arsenović