usr/src/test/zfs-tests/tests/functional/reservation/reservation_022_pos.sh

   1 #!/usr/bin/bash -p
   2 #
   3 # This file and its contents are supplied under the terms of the
   4 # Common Development and Distribution License ("CDDL"), version 1.0.
   5 # You may only use this file in accordance with the terms of version
   6 # 1.0 of the CDDL.
   7 #
   8 # A full copy of the text of the CDDL should have accompanied this
   9 # source.  A copy of the CDDL is also available via the Internet at
  10 # http://www.illumos.org/license/CDDL.
  11 #
  12
  13 #
  14 # Copyright 2018 Joyent, Inc.
  15 #
  16
  17 . $STF_SUITE/include/libtest.shlib
  18 . $STF_SUITE/tests/functional/reservation/reservation.shlib
  19
  20 #
  21 # DESCRIPTION:
  22 #
  23 # Cloning a volume with -o refreservation=auto creates a thick provisioned
  24 # volume
  25 #
  26 # STRATEGY:
  27 # 1) Create a sparse volume.
  28 # 2) Snapshot and clone it, using clone -o refreservation=auto.
  29 # 3) Verify that the clone has refreservation that matches the size predicted by
  30 #    volsize_to_reservation().
  31 # 4) Snapshot this second volume and clone it, using clone -o
  32 #    refreservation=auto.
  33 # 5) Verify that the second clone has refreservation that matches the size
  34 #    predicted by volsize_to_reservation().
  35 #
  36
  37 verify_runnable "global"
  38
  39 function cleanup
  40 {
  41         if datasetexists $TESTPOOL/$TESTVOL; then
  42                 # Destroy first vol and descendants in one go.
  43                 log_must zfs destroy -Rf $TESTPOOL/$TESTVOL
  44         fi
  45 }
  46
  47 log_onexit cleanup
  48
  49 log_assert "Cloning a volume with -o refreservation=auto creates a thick" \
  50     "provisioned volume"
  51
  52 space_avail=$(get_prop available $TESTPOOL)
  53 (( vol_size = (space_avail / 4) & ~(1024 * 1024 - 1) ))
  54
  55 vol=$TESTPOOL/$TESTVOL
  56 vol2=$TESTPOOL/$TESTVOL2
  57 vol3=$TESTPOOL/$TESTVOL2-again
  58
  59 # Create sparse vol and verify
  60 log_must zfs create -s -V $vol_size $vol
  61 resv=$(get_prop refreservation $vol)
  62 log_must test $resv -eq 0
  63
  64 # Clone it
  65 snap=$vol@clone
  66 log_must zfs snapshot $snap
  67 log_must zfs clone -o refreservation=auto $snap $vol2
  68
  69 # Verify it is thick provisioned
  70 resv=$(get_prop refreservation $vol2)
  71 expected=$(volsize_to_reservation $vol2 $vol_size)
  72 log_must test $resv -eq $expected
  73
  74 # Clone the thick provisioned volume
  75 snap=$vol2@clone
  76 log_must zfs snapshot $snap
  77 log_must zfs clone -o refreservation=auto $snap $vol3
  78
  79 # Verify new newest clone is also thick provisioned
  80 resv=$(get_prop refreservation $vol3)
  81 expected=$(volsize_to_reservation $vol3 $vol_size)
  82 log_must test $resv -eq $expected
  83
  84 log_pass "Cloning a thick provisioned volume results in a sparse volume"