2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved.
5 # FS QA Test No. btrfs/222
7 # Test an incremental send operation after doing a series of changes in a tree
8 # such that one inode gets two hardlinks with names and locations swapped with
9 # two other inodes that correspond to different directories, and one of these
10 # directories is the parent of the other directory.
13 seqres=$RESULT_DIR/$seq
14 echo "QA output created by $seq"
17 status=1 # failure is the default!
18 trap "_cleanup; exit \$status" 0 1 2 3 15
23 rm -fr $send_files_dir
27 # get standard environment, filters and checks
31 # real QA test starts here
37 send_files_dir=$TEST_DIR/btrfs-test-$seq
40 rm -fr $send_files_dir
43 _scratch_mkfs >>$seqres.full 2>&1
49 mkdir $SCRATCH_MNT/d1/d2
51 # Filesystem looks like:
56 # |----- d1/ (ino 259)
57 # |----- d2/ (ino 260)
59 $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
60 $SCRATCH_MNT/mysnap1 > /dev/null
62 $BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \
63 $SCRATCH_MNT/mysnap1 2>&1 1>/dev/null | _filter_scratch
65 # Now do a series of changes such that:
67 # *) inode 258 has one new hardlink and the previous name changed
69 # *) both names conflict with the old names of two other inodes:
71 # 1) the new name "d1" conflicts with the old name of inode 259, under
72 # directory inode 256 (root)
74 # 2) the new name "d2" conflicts with the old name of inode 260 under
77 # *) inodes 259 and 260 now have the old names of inode 258
79 # *) inode 257 is now located under inode 260 - an inode with a number
80 # smaller than the inode (258) for which we created a second hard link
81 # and swapped its names with inodes 259 and 260
83 ln $SCRATCH_MNT/f2 $SCRATCH_MNT/d1/f2_link
84 mv $SCRATCH_MNT/f1 $SCRATCH_MNT/d1/d2/f1
87 mv $SCRATCH_MNT/d1 $SCRATCH_MNT/tmp
88 mv $SCRATCH_MNT/f2 $SCRATCH_MNT/d1
89 mv $SCRATCH_MNT/tmp $SCRATCH_MNT/f2
92 mv $SCRATCH_MNT/f2/d2 $SCRATCH_MNT/tmp
93 mv $SCRATCH_MNT/f2/f2_link $SCRATCH_MNT/f2/d2
94 mv $SCRATCH_MNT/tmp $SCRATCH_MNT/f2/f2_link
96 # Filesystem now looks like:
100 # |----- f2/ (ino 259)
101 # |----- f2_link/ (ino 260)
102 # | |----- f1 (ino 257)
104 # |----- d2 (ino 258)
107 $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
108 $SCRATCH_MNT/mysnap2 > /dev/null
109 $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
110 $SCRATCH_MNT/mysnap2 2>&1 1>/dev/null | _filter_scratch
112 $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
113 $FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
114 -x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2
116 # Now recreate the filesystem by receiving both send streams and verify we get
117 # the same content that the original filesystem had.
119 _scratch_mkfs >>$seqres.full 2>&1
122 $BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null
124 # The receive operation below used to fail with the following error:
126 # ERROR: rename d1/d2 -> o260-6-0 failed: No such file or directory
128 # Because when processing inode 258, the kernel orphanized first inode 259,
129 # renaming it from "d1" to "o259-6-0", since it the new reference named "d1"
130 # for inode 258 conflicts with the old one of inode 259, which was not yet
131 # processed. After that, because the new reference named "d2" for inode 258
132 # conflicts with the old reference of the not yet processed inode 260, it
133 # tried to orphanize inode 260 - however the corresponding rename operation
134 # used a source path of "d1/d2", instead of "o259-6-0/d2".
136 $BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null
138 $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
139 $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2