tests/btrfs/128

   1 #! /bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (C) 2016 SUSE Linux Products GmbH. All Rights Reserved.
   4 #
   5 # FS QA Test No. btrfs/128
   6 #
   7 # Test that, under a particular scenario, an incremental send operation does
   8 # not leak memory (which used to emit a warning in dmesg/syslog).
   9 #
  10 seq=`basename $0`
  11 seqres=$RESULT_DIR/$seq
  12 echo "QA output created by $seq"
  13
  14 tmp=/tmp/$$
  15 status=1        # failure is the default!
  16 trap "_cleanup; exit \$status" 0 1 2 3 15
  17
  18 _cleanup()
  19 {
  20         cd /
  21         rm -fr $send_files_dir
  22         rm -f $tmp.*
  23 }
  24
  25 # get standard environment, filters and checks
  26 . ./common/rc
  27 . ./common/filter
  28
  29 # real QA test starts here
  30 _supported_fs btrfs
  31 _require_test
  32 _require_scratch
  33 _require_fssum
  34
  35 send_files_dir=$TEST_DIR/btrfs-test-$seq
  36
  37 rm -f $seqres.full
  38 rm -fr $send_files_dir
  39 mkdir $send_files_dir
  40
  41 _scratch_mkfs >>$seqres.full 2>&1
  42 _scratch_mount
  43
  44 mkdir $SCRATCH_MNT/a
  45 mkdir $SCRATCH_MNT/tmp
  46 mkdir $SCRATCH_MNT/del
  47 mv $SCRATCH_MNT/tmp $SCRATCH_MNT/del
  48 mkdir $SCRATCH_MNT/a/c
  49 mkdir $SCRATCH_MNT/del/x
  50 mkdir $SCRATCH_MNT/del/y
  51
  52 # Filesystem looks like:
  53 #
  54 # .                                                             (ino 256)
  55 # |--- a/                                                       (ino 257)
  56 # |    |--- c/                                                  (ino 260)
  57 # |
  58 # |--- del/                                                     (ino 259)
  59 #       |--- tmp/                                               (ino 258)
  60 #       |--- x/                                                 (ino 261)
  61 #       |--- y/                                                 (ino 262)
  62 #
  63 _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
  64
  65 # It used to be that when attempting to issue an rmdir operation for inode 259,
  66 # the kernel allocated an orphan_dir_info structure so that later after doing
  67 # the delayed rename operation for inode 258 (which happened once inode 260 was
  68 # renamed) it would check if it could finally issue a rmdir instruction for
  69 # inode 259. If it couldn't, it would not release the previously allocated
  70 # orphan_dir_info structure immediately. Instead it would only release it once
  71 # it finished the send stream and it would emit a warning in dmesg/syslog.
  72 #
  73 mv $SCRATCH_MNT/a/c $SCRATCH_MNT
  74 mv $SCRATCH_MNT/del/x $SCRATCH_MNT/a
  75 mv $SCRATCH_MNT/del/y $SCRATCH_MNT/a
  76 mv $SCRATCH_MNT/del/tmp $SCRATCH_MNT/c
  77 rmdir $SCRATCH_MNT/del
  78
  79 # Filesystem now looks like:
  80 #
  81 # .                                                             (ino 256)
  82 # |--- a/                                                       (ino 257)
  83 # |    |--- x/                                                  (ino 261)
  84 # |    |--- y/                                                  (ino 262)
  85 # |
  86 # |--- c/                                                       (ino 260)
  87 #      |--- tmp/                                                (ino 258)
  88 #
  89 _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2
  90
  91 run_check $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
  92 run_check $FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
  93         -x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2
  94
  95 _run_btrfs_util_prog send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1
  96 _run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
  97         $SCRATCH_MNT/mysnap2
  98
  99 # Now recreate the filesystem by receiving both send streams and verify we get
 100 # the same content that the original filesystem had.
 101 _scratch_unmount
 102 _scratch_mkfs >>$seqres.full 2>&1
 103 _scratch_mount
 104
 105 _run_btrfs_util_prog receive -f $send_files_dir/1.snap $SCRATCH_MNT
 106 run_check $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
 107 _run_btrfs_util_prog receive -f $send_files_dir/2.snap $SCRATCH_MNT
 108 run_check $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2
 109
 110 echo "Silence is golden"
 111 status=0
 112 exit