tests/btrfs/084

   1 #! /bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
   4 #
   5 # FS QA Test No. btrfs/084
   6 #
   7 # Test for incremental send where the difference between the parent and send
   8 # snapshots is that for a subtree with the same path in both snapshots (p1/p2),
   9 # the root directories were swapped.
  10 #
  11 # This issue was fixed by the following linux kernel btrfs patch:
  12 #
  13 #   Btrfs: incremental send, clear name from cache after orphanization
  14 #
  15 seq=`basename $0`
  16 seqres=$RESULT_DIR/$seq
  17 echo "QA output created by $seq"
  18
  19 tmp=/tmp/$$
  20 status=1        # failure is the default!
  21 trap "_cleanup; exit \$status" 0 1 2 3 15
  22
  23 _cleanup()
  24 {
  25         rm -fr $send_files_dir
  26         rm -f $tmp.*
  27 }
  28
  29 # get standard environment, filters and checks
  30 . ./common/rc
  31 . ./common/filter
  32
  33 # real QA test starts here
  34 _supported_fs btrfs
  35 _require_scratch
  36 _require_fssum
  37
  38 send_files_dir=$TEST_DIR/btrfs-test-$seq
  39
  40 rm -f $seqres.full
  41 rm -fr $send_files_dir
  42 mkdir $send_files_dir
  43
  44 _scratch_mkfs >>$seqres.full 2>&1
  45 _scratch_mount
  46
  47 mkdir -p $SCRATCH_MNT/data/n1/n2/p1/p2
  48 mkdir $SCRATCH_MNT/data/n4
  49 mkdir -p $SCRATCH_MNT/data/p1/p2
  50
  51 # Filesystem looks like:
  52 #
  53 # .                                       (ino 256)
  54 # |---- data                              (ino 257)
  55 #         |---- n1/                       (ino 258)
  56 #         |     |---- n2/                 (ino 259)
  57 #         |           |---- p1/           (ino 260)
  58 #         |                 |---- p2/     (ino 261)
  59 #         |
  60 #         |---- n4/                       (ino 262)
  61 #         |---- p1/                       (ino 263)
  62 #               |---- p2/                 (ino 264)
  63 #
  64 _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
  65
  66 # Now move directories around such that for the subtrees with the path "p1/p2"
  67 # we end up swapping the parents, that is, inode 263 becomes the parent of
  68 # inode 261 and inode 260 becomes the parent of inode 264. This makes the send
  69 # stream orphanize the inodes 263 and 264, and we want to verify the respective
  70 # rename operations don't fail, that they don't use incorrect paths.
  71 mv $SCRATCH_MNT/data/p1/p2 $SCRATCH_MNT/data
  72 mv $SCRATCH_MNT/data/n1/n2/p1/p2 $SCRATCH_MNT/data/p1
  73 mv $SCRATCH_MNT/data/p2 $SCRATCH_MNT/data/n1/n2/p1
  74 mv $SCRATCH_MNT/data/n1/n2 $SCRATCH_MNT/data/p1
  75 mv $SCRATCH_MNT/data/p1 $SCRATCH_MNT/data/n4
  76 mv $SCRATCH_MNT/data/n4/p1/n2/p1 $SCRATCH_MNT/data
  77
  78 # Filesystem now looks like:
  79 #
  80 # .                                       (ino 256)
  81 # |---- data                              (ino 257)
  82 #         |---- n1/                       (ino 258)
  83 #         |---- n4/                       (ino 262)
  84 #         |     |---- p1/                 (ino 263)
  85 #         |           |---- n2/           (ino 259)
  86 #         |           |---- p2/           (ino 261)
  87 #         |
  88 #         |---- p1/                       (ino 260)
  89 #               |---- p2/                 (ino 264)
  90 #
  91 _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2
  92
  93 run_check $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
  94 run_check $FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
  95         -x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2
  96
  97 _run_btrfs_util_prog send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1
  98 _run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
  99         $SCRATCH_MNT/mysnap2
 100
 101 # Now recreate the filesystem by receiving both send streams and verify we get
 102 # the same content that the original filesystem had.
 103 _scratch_unmount
 104 _scratch_mkfs >>$seqres.full 2>&1
 105 _scratch_mount
 106
 107 _run_btrfs_util_prog receive -f $send_files_dir/1.snap $SCRATCH_MNT
 108 run_check $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
 109 _run_btrfs_util_prog receive -f $send_files_dir/2.snap $SCRATCH_MNT
 110 run_check $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2
 111
 112 echo "Silence is golden"
 113 status=0
 114 exit