common/dmerror

   1 ##/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (c) 2015 Oracle.  All Rights Reserved.
   4 #
   5 # common functions for setting up and tearing down a dmerror device
   6
   7 _dmerror_setup()
   8 {
   9         local dm_backing_dev=$SCRATCH_DEV
  10
  11         local blk_dev_size=`blockdev --getsz $dm_backing_dev`
  12
  13         DMERROR_DEV='/dev/mapper/error-test'
  14
  15         DMLINEAR_TABLE="0 $blk_dev_size linear $dm_backing_dev 0"
  16
  17         DMERROR_TABLE="0 $blk_dev_size error $dm_backing_dev 0"
  18 }
  19
  20 _dmerror_init()
  21 {
  22         _dmerror_setup
  23         _dmsetup_remove error-test
  24         _dmsetup_create error-test --table "$DMLINEAR_TABLE" || \
  25                 _fatal "failed to create dm linear device"
  26 }
  27
  28 _dmerror_mount()
  29 {
  30         _scratch_options mount
  31         $MOUNT_PROG -t $FSTYP `_common_dev_mount_options $*` $SCRATCH_OPTIONS \
  32                 $DMERROR_DEV $SCRATCH_MNT
  33 }
  34
  35 _dmerror_unmount()
  36 {
  37         umount $SCRATCH_MNT
  38 }
  39
  40 _dmerror_cleanup()
  41 {
  42         $DMSETUP_PROG resume error-test > /dev/null 2>&1
  43         $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
  44         _dmsetup_remove error-test
  45 }
  46
  47 _dmerror_load_error_table()
  48 {
  49         local load_res=0
  50         local resume_res=0
  51
  52         suspend_opt="--nolockfs"
  53
  54         if [ "$1" = "lockfs" ]; then
  55                 suspend_opt=""
  56         elif [ -n "$*" ]; then
  57                 suspend_opt="$*"
  58         fi
  59
  60         $DMSETUP_PROG suspend $suspend_opt error-test
  61         [ $? -ne 0 ] && _fail  "dmsetup suspend failed"
  62
  63         $DMSETUP_PROG load error-test --table "$DMERROR_TABLE"
  64         load_res=$?
  65
  66         $DMSETUP_PROG resume error-test
  67         resume_res=$?
  68
  69         [ $load_res -ne 0 ] && _fail "dmsetup failed to load error table"
  70         [ $resume_res -ne 0 ] && _fail  "dmsetup resume failed"
  71 }
  72
  73 _dmerror_load_working_table()
  74 {
  75         local load_res=0
  76         local resume_res=0
  77
  78         suspend_opt="--nolockfs"
  79
  80         if [ "$1" = "lockfs" ]; then
  81                 suspend_opt=""
  82         elif [ -n "$*" ]; then
  83                 suspend_opt="$*"
  84         fi
  85
  86         $DMSETUP_PROG suspend $suspend_opt error-test
  87         [ $? -ne 0 ] && _fail  "dmsetup suspend failed"
  88
  89         $DMSETUP_PROG load error-test --table "$DMLINEAR_TABLE"
  90         load_res=$?
  91
  92         $DMSETUP_PROG resume error-test
  93         resume_res=$?
  94
  95         [ $load_res -ne 0 ] && _fail "dmsetup failed to load error table"
  96         [ $resume_res -ne 0 ] && _fail  "dmsetup resume failed"
  97 }