mirror of
https://github.com/linux-apfs/apfstests.git
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Dave Chinner
1ff4192932
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
144 lines
4.8 KiB
Bash
Executable File
144 lines
4.8 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2017 Synology Inc. All Rights Reserved.
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#
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# FS QA Test No. btrfs/135
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#
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# Test that an incremental send operation works when in both snapshots there are
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# two directory inodes that have the same number but different generations and
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# have an entry with the same name that corresponds to different inodes in each
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# snapshot.
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -fr $send_files_dir
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_test
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_require_scratch
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_require_fssum
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send_files_dir=$TEST_DIR/btrfs-test-$seq
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rm -f $seqres.full
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rm -fr $send_files_dir
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mkdir $send_files_dir
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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touch $SCRATCH_MNT/f
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mkdir $SCRATCH_MNT/d1
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mkdir $SCRATCH_MNT/d259_old
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mv $SCRATCH_MNT/d1 $SCRATCH_MNT/d259_old/d1
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# Filesystem looks like:
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#
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# . (ino 256)
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# |--- f (ino 257)
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# |
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# |--- d259_old/ (ino 259)
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# |--- d1/ (ino 258)
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#
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
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$SCRATCH_MNT/mysnap1 > /dev/null
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$BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \
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$SCRATCH_MNT/mysnap1 2>&1 1>/dev/null | _filter_scratch
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_scratch_unmount
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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mkdir $SCRATCH_MNT/d1
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mkdir $SCRATCH_MNT/dir258
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mkdir $SCRATCH_MNT/dir259
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mv $SCRATCH_MNT/d1 $SCRATCH_MNT/dir259/d1
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# Filesystem now looks like:
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#
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# . (ino 256)
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# |--- dir258/ (ino 258)
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# |
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# |--- dir259/ (ino 259)
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# |--- d1/ (ino 257)
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#
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# Notice that at this point all inodes have a generation with value 7, which is
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# the generation value for a brand new filesystem.
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# Now create the second snapshot. This makes the filesystem's current generation
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# value to increase to the value 8, due to a transaction commit performed by the
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# snapshot creation ioctl.
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
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$SCRATCH_MNT/mysnap2 > /dev/null
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# Now receive the first snapshot created in the first filesystem.
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# Before creating any inodes, the receive command creates the first snapshot,
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# which causes a transaction commit and therefore bumps the filesystem's current
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# generation to the value 9. All the inodes created end up getting a generation
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# value of 9 and the snapshot's root inode (256) gets a generation value of 8.
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$BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null
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rm $send_files_dir/1.snap
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$FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
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$FSSUM_PROG -A -f -w $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2
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$BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \
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$SCRATCH_MNT/mysnap1 2>&1 1>/dev/null | _filter_scratch
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$BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
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$SCRATCH_MNT/mysnap2 2>&1 1>/dev/null | _filter_scratch
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# Now recreate the filesystem by receiving both send streams and verify we get
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# the same content that the original filesystem had.
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_scratch_unmount
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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$BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null
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$FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
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# The receive of the incremental send stream used to fail because it contained
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# a rmdir operation with an invalid path. The output of the receive command,
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# with verbose mode (argument -vv), was the following:
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#
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# utimes
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# unlink f
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# mkdir o257-7-0
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# mkdir o259-7-0
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# rename o257-7-0 -> o259-7-0/d1
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# chown o259-7-0/d1 - uid=0, gid=0
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# chmod o259-7-0/d1 - mode=0755
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# utimes o259-7-0/d1
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# rmdir o258-9-0
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# ERROR: rmdir o258-9-0 failed: No such file or directory
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#
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# When the kernel was computing the send stream and processing inode 258, it
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# noticed that in both snapshots this inode is a direct child of inode 259, and
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# that in both snapshots inode 259 as an entry with the name "d1". Because of
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# that it decided (incorrectly) to issue an rmdir operation using the orphanized
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# name of the inode 258 from the parent snapshot (which has a generation of 9).
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# However that decision to send an rmdir operation due to the dentry collision
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# was incorrect because the inodes with number 259 in both snapshots are not the
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# same, they have different generations.
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#
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$BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null
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$FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2
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status=0
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exit
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