tests/btrfs/254

   1 #! /bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (c) 2021 Anand Jain. All Rights Reserved.
   4 # Copyright (c) 2021 Oracle. All Rights Reserved.
   5 #
   6 # FS QA Test No. 254
   7 #
   8 # Test if the kernel can free the stale device entries.
   9 #
  10 # Tests bug fixed by the kernel patch:
  11 #       btrfs: harden identification of the stale device
  12 #
  13 . ./common/preamble
  14 _begin_fstest auto quick volume
  15
  16 # Override the default cleanup function.
  17 node=$seq-test
  18 cleanup_dmdev()
  19 {
  20         _dmsetup_remove $node
  21 }
  22
  23 _cleanup()
  24 {
  25         cd /
  26         rm -f $tmp.*
  27         rm -rf $seq_mnt > /dev/null 2>&1
  28         cleanup_dmdev
  29 }
  30
  31 # Import common functions.
  32 . ./common/filter
  33 . ./common/filter.btrfs
  34
  35 # real QA test starts here
  36 _supported_fs btrfs
  37 _require_scratch_dev_pool 3
  38 _require_block_device $SCRATCH_DEV
  39 _require_dm_target linear
  40 _require_btrfs_forget_or_module_loadable
  41 _require_scratch_nocheck
  42 _require_command "$WIPEFS_PROG" wipefs
  43
  44 _scratch_dev_pool_get 3
  45
  46 setup_dmdev()
  47 {
  48         # Some small size.
  49         size=$((1024 * 1024 * 1024))
  50         size_in_sector=$((size / 512))
  51
  52         table="0 $size_in_sector linear $SCRATCH_DEV 0"
  53         _dmsetup_create $node --table "$table" || \
  54                 _fail "setup dm device failed"
  55 }
  56
  57 # Use a known it is much easier to debug.
  58 lvdev=/dev/mapper/$node
  59
  60 seq_mnt=$TEST_DIR/$seq.mnt
  61 mkdir -p $seq_mnt
  62
  63 test_forget()
  64 {
  65         setup_dmdev
  66         dmdev=$(realpath $lvdev)
  67
  68         _mkfs_dev $dmdev
  69
  70         # Check if we can un-scan using the mapper device path.
  71         $BTRFS_UTIL_PROG device scan --forget $lvdev
  72
  73         # Cleanup
  74         $WIPEFS_PROG -a $lvdev > /dev/null 2>&1
  75         $BTRFS_UTIL_PROG device scan --forget
  76
  77         cleanup_dmdev
  78 }
  79
  80 test_add_device()
  81 {
  82         setup_dmdev
  83         dmdev=$(realpath $lvdev)
  84         scratch_dev2=$(echo $SCRATCH_DEV_POOL | awk '{print $2}')
  85         scratch_dev3=$(echo $SCRATCH_DEV_POOL | awk '{print $3}')
  86
  87         _mkfs_dev $scratch_dev3
  88         _mount $scratch_dev3 $seq_mnt
  89
  90         _mkfs_dev -draid1 -mraid1 $lvdev $scratch_dev2
  91
  92         # Added device should free the stale device in the kernel.
  93         $BTRFS_UTIL_PROG device add -f $dmdev $seq_mnt > /dev/null 2>&1
  94
  95         _mount -o degraded $scratch_dev2 $SCRATCH_MNT
  96
  97         # Check if the missing device is shown.
  98         $BTRFS_UTIL_PROG filesystem show -m $SCRATCH_MNT | \
  99                                         _filter_btrfs_filesystem_show
 100
 101         $UMOUNT_PROG $seq_mnt
 102         _scratch_unmount
 103         cleanup_dmdev
 104 }
 105
 106 test_forget
 107 test_add_device
 108
 109 _scratch_dev_pool_put
 110
 111 status=0
 112 exit