mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Amir Goldstein
0f7340ad47
Check that files from middle layer on same fs as upper layer
are not allowed to export the real inode st_dev;st_ino.
This is a regression test for kernel commit:
9c6d8f13e9da ("ovl: fix corner case of non-unique st_dev;st_ino")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
95 lines
2.4 KiB
Bash
Executable File
95 lines
2.4 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2019 CTERA Networks. All Rights Reserved.
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#
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# FSQA Test No. 067
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#
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# Test unique st_dev;st_ino on non-samefs setup.
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#
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# Check that files from middle layer on same fs as upper layer
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# are not allowed to export the real inode st_dev;st_ino.
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#
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# This is a regression test for kernel commit:
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# 9c6d8f13e9da ovl: fix corner case of non-unique st_dev;st_ino
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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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here=`pwd`
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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 -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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rm -f $seqres.full
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# real QA test starts here
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_supported_fs overlay
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_supported_os Linux
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# Use non-default scratch underlying overlay dirs, we need to check
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# them explicity after test.
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_require_scratch_nocheck
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_require_test
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# Lower is on test partition
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lower=$OVL_BASE_TEST_DIR/$OVL_LOWER-$seq
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# Upper/work are on scratch partition
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middle=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
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upper=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
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work=$OVL_BASE_SCRATCH_MNT/$OVL_WORK
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rm -rf $lower
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mkdir $lower
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_scratch_mkfs >>$seqres.full 2>&1
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realfile=$middle/file
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testfile=$SCRATCH_MNT/file
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# Create a file on middle layer on same fs as upper layer
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echo wrong > $realfile
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# Mount an overlay on $SCRATCH_MNT with lower layer on test partition
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# and middle and upper layer on scratch partition.
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# Disable xino, so not all overlay inodes are on the same st_dev.
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_overlay_scratch_mount_dirs $middle:$lower $upper $work -o xino=off || \
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_notrun "cannot mount overlay with xino=off option"
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stat $realfile >>$seqres.full
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stat $testfile >>$seqres.full
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# Diverge the content of the overlay file from its origin
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echo right > $testfile
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stat $testfile >>$seqres.full
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# Expect the overlay file to differ from the original lower file
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diff -q $realfile $testfile >>$seqres.full &&
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echo "diff with middle layer file doesn't know right from wrong! (warm cache)"
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echo 3 > /proc/sys/vm/drop_caches
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stat $testfile >>$seqres.full
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# Expect the overlay file to differ from the original lower file
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diff -q $realfile $testfile >>$seqres.full &&
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echo "diff with middle layer file doesn't know right from wrong! (cold cache)"
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$UMOUNT_PROG $SCRATCH_MNT
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# check overlayfs
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_overlay_check_scratch_dirs $middle:$lower $upper $work -o xino=off
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echo "Silence is golden"
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status=0
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exit
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