tests/btrfs/178

   1 #! /bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (C) 2017 SUSE Linux Products GmbH. All Rights Reserved.
   4 #
   5 # FS QA Test No. btrfs/178
   6 #
   7 # Test an incremental send operation in a scenario where the relationship of
   8 # ancestor-descendant between multiple directories is inversed, and where
   9 # multiple directories that were previously ancestors of another directory now
  10 # become descendents of multiple directories that used to be their ancestors in
  11 # the parent snapshot. This used to trigger an infinite loop in the kernel code.
  12 #
  13 seq=`basename $0`
  14 seqres=$RESULT_DIR/$seq
  15 echo "QA output created by $seq"
  16
  17 tmp=/tmp/$$
  18 status=1        # failure is the default!
  19 trap "_cleanup; exit \$status" 0 1 2 3 15
  20
  21 _cleanup()
  22 {
  23         cd /
  24         rm -fr $send_files_dir
  25         rm -f $tmp.*
  26 }
  27
  28 # get standard environment, filters and checks
  29 . ./common/rc
  30 . ./common/filter
  31
  32 # real QA test starts here
  33 _supported_fs btrfs
  34 _supported_os Linux
  35 _require_test
  36 _require_scratch
  37 _require_fssum
  38
  39 send_files_dir=$TEST_DIR/btrfs-test-$seq
  40
  41 rm -f $seqres.full
  42 rm -fr $send_files_dir
  43 mkdir $send_files_dir
  44
  45 _scratch_mkfs >>$seqres.full 2>&1
  46 _scratch_mount
  47
  48 # The name of each directory corresponds to its inode number, to make it easier
  49 # to debug since btrfs' send processes inodes in ascending order according to
  50 # their number.
  51 mkdir $SCRATCH_MNT/257
  52 mkdir $SCRATCH_MNT/258
  53 mv $SCRATCH_MNT/257 $SCRATCH_MNT/258/257
  54 mkdir $SCRATCH_MNT/259
  55 mkdir $SCRATCH_MNT/260
  56 mkdir $SCRATCH_MNT/261
  57 mkdir $SCRATCH_MNT/262
  58 mkdir $SCRATCH_MNT/263
  59 mkdir $SCRATCH_MNT/264
  60 mv $SCRATCH_MNT/258 $SCRATCH_MNT/264/258
  61 mkdir $SCRATCH_MNT/265
  62 mkdir $SCRATCH_MNT/266
  63 mv $SCRATCH_MNT/259 $SCRATCH_MNT/266/259
  64 mv $SCRATCH_MNT/260 $SCRATCH_MNT/266/260
  65 mv $SCRATCH_MNT/264 $SCRATCH_MNT/266/264
  66 mv $SCRATCH_MNT/265 $SCRATCH_MNT/266/265
  67 mkdir $SCRATCH_MNT/266/260/267
  68 mkdir $SCRATCH_MNT/266/268
  69 mkdir $SCRATCH_MNT/266/269
  70 mv $SCRATCH_MNT/262 $SCRATCH_MNT/266/269/262
  71 mkdir $SCRATCH_MNT/266/270
  72 mkdir $SCRATCH_MNT/271
  73 mv $SCRATCH_MNT/266 $SCRATCH_MNT/271/266
  74 mkdir $SCRATCH_MNT/271/266/272
  75 mv $SCRATCH_MNT/263 $SCRATCH_MNT/271/266/272/263
  76 mkdir $SCRATCH_MNT/273
  77 mkdir $SCRATCH_MNT/271/266/274
  78 mv $SCRATCH_MNT/273 $SCRATCH_MNT/271/266/274/273
  79 mkdir $SCRATCH_MNT/271/266/272/275
  80 mv $SCRATCH_MNT/271 $SCRATCH_MNT/261/271
  81
  82 # Filesystem looks like:
  83 #
  84 # .
  85 # |--- 261/
  86 #       |--- 271/
  87 #             |--- 266/
  88 #                   |--- 259/
  89 #                   |--- 260/
  90 #                   |     |--- 267
  91 #                   |
  92 #                   |--- 264/
  93 #                   |     |--- 258/
  94 #                   |           |--- 257/
  95 #                   |
  96 #                   |--- 265/
  97 #                   |--- 268/
  98 #                   |--- 269/
  99 #                   |     |--- 262/
 100 #                   |
 101 #                   |--- 270/
 102 #                   |--- 272/
 103 #                   |     |--- 263/
 104 #                   |     |--- 275/
 105 #                   |
 106 #                   |--- 274/
 107 #                         |--- 273/
 108 #
 109 $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
 110         $SCRATCH_MNT/mysnap1 > /dev/null
 111
 112 $BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \
 113         $SCRATCH_MNT/mysnap1 2>&1 1>/dev/null | _filter_scratch
 114
 115 mv $SCRATCH_MNT/261/271/266/272/275 $SCRATCH_MNT/275
 116 mv $SCRATCH_MNT/261/271/266/274 $SCRATCH_MNT/275/274
 117 mv $SCRATCH_MNT/261/271/266/269/262 $SCRATCH_MNT/275/274/273/262
 118 mv $SCRATCH_MNT/261/271/266/269 $SCRATCH_MNT/275/274/273/262/269
 119 mv $SCRATCH_MNT/261/271/266/264/258/257 $SCRATCH_MNT/261/271/266/272
 120 mv $SCRATCH_MNT/261/271/266/264/258 $SCRATCH_MNT/275/274/273/262/269/258
 121 mv $SCRATCH_MNT/261/271 $SCRATCH_MNT/275/274/273/262/269/258/271
 122 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/268 \
 123         $SCRATCH_MNT/275/274/273/262/269/258/271/268
 124 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/260/267 \
 125         $SCRATCH_MNT/275/274/273/262/269/258/271/268/267
 126 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/270 \
 127         $SCRATCH_MNT/275/274/273/262/269/258/271/268/267/270
 128 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/265 \
 129         $SCRATCH_MNT/275/274/273/262/269/258/271/266/259/265
 130 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/259 \
 131         $SCRATCH_MNT/275/274/273/262/269/258/271/268/267/270/259
 132 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/272/263 \
 133         $SCRATCH_MNT/275/274/273/262/269/258/271/266/264/263
 134 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/272 \
 135         $SCRATCH_MNT/275/274/273/262/269/258/271/268/267/270/272
 136 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/260 \
 137         $SCRATCH_MNT/275/274/273/262/269/258/271/268/267/270/272/257/260
 138 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266/264 \
 139         $SCRATCH_MNT/275/274/273/262/269/258/271/268/267/270/272/257/264
 140 mv $SCRATCH_MNT/261 \
 141         $SCRATCH_MNT/275/274/273/262/269/258/271/268/267/270/272/257/264/263/261
 142 mv $SCRATCH_MNT/275/274/273/262/269/258/271/266 \
 143         $SCRATCH_MNT/275/274/273/262/269/258/271/268/267/270/272/257/264/263/261/266
 144
 145 # Filesystem now looks like:
 146 #
 147 # .
 148 # |-- 275/
 149 #      |-- 274/
 150 #           |-- 273/
 151 #                |-- 262/
 152 #                     |-- 269/
 153 #                          |-- 258/
 154 #                               |-- 271/
 155 #                                    |-- 268/
 156 #                                         |-- 267/
 157 #                                              |-- 270/
 158 #                                                   |-- 259/
 159 #                                                   |    |-- 265/
 160 #                                                   |
 161 #                                                   |-- 272/
 162 #                                                        |-- 257/
 163 #                                                             |-- 260/
 164 #                                                             |-- 264/
 165 #                                                                  |-- 263/
 166 #                                                                       |-- 261/
 167 #                                                                            |-- 266/
 168 #
 169 $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
 170                  $SCRATCH_MNT/mysnap2 > /dev/null
 171 $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
 172                  $SCRATCH_MNT/mysnap2 2>&1 1>/dev/null | _filter_scratch
 173
 174 $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
 175 $FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
 176         -x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2
 177
 178 # Now recreate the filesystem by receiving both send streams and verify we get
 179 # the same content that the original filesystem had.
 180 _scratch_unmount
 181 _scratch_mkfs >>$seqres.full 2>&1
 182 _scratch_mount
 183
 184 $BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null
 185 $BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null
 186 $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
 187 $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2
 188
 189 status=0
 190 exit