tests/ext4/050

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (c) 2021 Google, Inc. All Rights Reserved.
   4 #
   5 # FS QA Test No. 050
   6 #
   7 # Test checkpoint and zeroout of journal via ioctl EXT4_IOC_CHECKPOINT
   8 #
   9
  10 . ./common/preamble
  11 _begin_fstest auto ioctl quick
  12
  13 # Import common functions.
  14 . ./common/filter
  15
  16 # real QA test starts here
  17 _supported_fs ext4
  18
  19 _require_scratch
  20 _require_command "$DEBUGFS_PROG" debugfs
  21
  22 checkpoint_journal=$here/src/checkpoint_journal
  23 _require_test_program "checkpoint_journal"
  24
  25 # convert output from stat<journal_inode> to list of block numbers
  26 get_journal_extents() {
  27         inode_info=$($DEBUGFS_PROG $SCRATCH_DEV -R "stat <8>" 2>> $seqres.full)
  28         echo -e "\nJournal info:" >> $seqres.full
  29         echo "$inode_info" >> $seqres.full
  30
  31         extents_line=$(echo "$inode_info" | awk '/EXTENTS:/{ print NR; exit }')
  32         get_extents=$(echo "$inode_info" | sed -n "$(($extents_line + 1))"p)
  33
  34         # get just the physical block numbers
  35         get_extents=$(echo "$get_extents" |  perl -pe 's|\(.*?\):||g' | sed -e 's/, /\n/g' | perl -pe 's|(\d+)-(\d+)|\1 \2|g')
  36
  37         echo "$get_extents"
  38 }
  39
  40 # checks all extents are zero'd out except for the superblock
  41 # arg 1: extents (output of get_journal_extents())
  42 check_extents() {
  43         echo -e "\nChecking extents:" >> $seqres.full
  44         echo "$1" >> $seqres.full
  45
  46         super_block="true"
  47         echo "$1" | while IFS= read line; do
  48                 start_block=$(echo $line | cut -f1 -d' ')
  49                 end_block=$(echo $line | cut -f2 -d' ' -s)
  50
  51                 # if first block of journal, shouldn't be wiped
  52                 if [ "$super_block" == "true" ]; then
  53                         super_block="false"
  54
  55                         #if super block only block in this extent, skip extent
  56                         if [ -z "$end_block" ]; then
  57                                 continue;
  58                         fi
  59                         start_block=$(($start_block + 1))
  60                 fi
  61
  62                 if [ ! -z "$end_block" ]; then
  63                         blocks=$(($end_block - $start_block + 1))
  64                 else
  65                         blocks=1
  66                 fi
  67
  68                 check=$(od $SCRATCH_DEV --skip-bytes=$(($start_block * $blocksize)) --read-bytes=$(($blocks * $blocksize)) -An -v | sed -e 's/[0 \t\n\r]//g')
  69
  70                 [ ! -z "$check" ] && echo "error" && break
  71         done
  72 }
  73
  74 testdir="${SCRATCH_MNT}/testdir"
  75
  76 _scratch_mkfs_sized $((64 * 1024 * 1024)) >> $seqres.full 2>&1
  77 _require_metadata_journaling $SCRATCH_DEV
  78 _scratch_mount >> $seqres.full 2>&1
  79 blocksize=$(_get_block_size $SCRATCH_MNT)
  80 mkdir $testdir
  81
  82 # check if ioctl present, skip test if not present
  83 $checkpoint_journal $SCRATCH_MNT --dry-run || _notrun "journal checkpoint ioctl not present on device"
  84
  85 # create some files to add some entries to journal
  86 for i in {1..100}; do
  87         echo > $testdir/$i
  88 done
  89
  90 # make sure these files get to the journal
  91 sync --file-system $testdir/1
  92
  93 # call ioctl to checkpoint and zero-fill journal blocks
  94 $checkpoint_journal $SCRATCH_MNT --erase=zeroout || _fail "ioctl returned error"
  95
  96 extents=$(get_journal_extents)
  97
  98 # check journal blocks zeroed out
  99 ret=$(check_extents "$extents")
 100 [ "$ret" = "error" ] && _fail "Journal was not zero-filled"
 101
 102 _scratch_unmount >> $seqres.full 2>&1
 103
 104 echo "Silence is golden"
 105
 106 status=0
 107 exit