tests/zfs-tests/tests/functional/zvol/zvol_misc/zvol_misc_common.kshlib

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   4 # The contents of this file are subject to the terms of the
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  10 # See the License for the specific language governing permissions
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  14 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15 # If applicable, add the following below this CDDL HEADER, with the
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  21
  22 #
  23 # Copyright 2017, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
  24 #
  25
  26 . $STF_SUITE/include/libtest.shlib
  27 . $STF_SUITE/tests/functional/cli_root/zfs_set/zfs_set_common.kshlib
  28 . $STF_SUITE/tests/functional/zvol/zvol_common.shlib
  29
  30 #
  31 # Wait for udev to settle, completely.
  32 # This is quite discomforting, but there's a race condition here
  33 # (Amazon 2015.09 x86_64 Release (TEST) is good at triggering this)  where the
  34 # kernel tries to remove zvol device nodes while they're open by [blkid],
  35 # [zvol_id] or other udev related processes.
  36 # Calling 'udevadm settle' is not enough: wait for those processes "manually".
  37 #
  38 function udev_wait
  39 {
  40         sleep 1
  41         udevadm trigger --action=change
  42         udevadm settle
  43         for i in {1..3}; do
  44                 blkid="$(pgrep blkid | wc -l)"
  45                 zvol_id="$(pgrep zvol_id | wc -l)"
  46                 [[ "0" == "$zvol_id" && "0" == "$blkid" ]] && return
  47                 udevadm settle
  48         done
  49         log_fail "Wait timeout reached for udev_wait"
  50 }
  51
  52 #
  53 # Clean up udev status
  54 # This is also a problem on "Amazon 2015.09 x86_64 Release (TEST)" where udev,
  55 # sometimes, does not clean up /dev/zvol symlinks correctly for removed ZVOLs.
  56 # Prune those links manually, then tell udev to forget them.
  57 #
  58 function udev_cleanup
  59 {
  60         log_note "Pruning broken ZVOL symlinks ..."
  61         udevadm settle
  62         # find all dangling links and delete them
  63         find -L "${ZVOL_DEVDIR}" -type l -print -delete
  64         # purge those links from udev database
  65         udevadm info --cleanup-db
  66 }
  67
  68 #
  69 # Verify $device exists and is a block device
  70 #
  71 function blockdev_exists # device
  72 {
  73         typeset device="$1"
  74
  75         # we wait here instead of doing it in a wrapper around 'zfs set snapdev'
  76         # because there are other commands (zfs snap, zfs inherit, zfs destroy)
  77         # that can affect device nodes
  78         for i in {1..3}; do
  79                 udev_wait
  80                 [[ -b "$device" ]] && return 0
  81         done
  82         log_fail "$device does not exist as a block device"
  83 }
  84
  85 #
  86 # Verify $device does not exist
  87 #
  88 function blockdev_missing # device
  89 {
  90         typeset device="$1"
  91
  92         # we wait here instead of doing it in a wrapper around 'zfs set snapdev'
  93         # because there are other commands (zfs snap, zfs inherit, zfs destroy)
  94         # that can affect device nodes
  95         for i in {1..3}; do
  96                 udev_wait
  97                 [[ ! -e "$device" ]] && return 0
  98         done
  99         log_fail "$device exists when not expected"
 100 }
 101
 102 #
 103 # Verify $property on $dataset is inherited by $parent and is set to $value
 104 #
 105 function verify_inherited # property value dataset parent
 106 {
 107         typeset property="$1"
 108         typeset value="$2"
 109         typeset dataset="$3"
 110         typeset parent="$4"
 111
 112         typeset val=$(get_prop "$property" "$dataset")
 113         typeset src=$(get_source "$property" "$dataset")
 114         if [[ "$val" != "$value" || "$src" != "inherited from $parent" ]]; then
 115                 log_fail "Dataset $dataset did not inherit $property properly:"\
 116                     "expected=$value, value=$val, source=$src."
 117         fi
 118 }
 119
 120 #
 121 # Create a small partition on $device, then verify if we can access it
 122 #
 123 function verify_partition # device
 124 {
 125         typeset device="$1"
 126
 127         if [[ ! -b "$device" ]]; then
 128                 log_fail "$device is not a block device"
 129         fi
 130         # create a small dummy partition
 131         set_partition 0 1 1m $device
 132         # verify we can access the partition on the device
 133         devname="$(readlink -f "$device")"
 134         if is_linux; then
 135                 [[ -b "$devname""p1" ]]
 136         else
 137                 [[ -b "$devname""s0" ]]
 138         fi
 139         return $?
 140 }