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https://github.com/linux-apfs/apfstests.git
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Filipe Manana
6eab1aafe2
Test that we are able to do send operations when one of the source snapshots (or subvolume) has a file that is deleted while there is still a open file descriptor for that file. This test is motivated by a bug found in btrfs which is fixed by a patch for the linux kernel titled: "Btrfs: fix send failure when root has deleted files still open" Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
137 lines
4.6 KiB
Bash
Executable File
137 lines
4.6 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. 168
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#
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# Test that we are able to do send operations when one of the source snapshots
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# (or subvolume) has a file that is deleted while there is still a open file
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# descriptor for that file.
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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 -f $tmp.*
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rm -fr $send_files_dir
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_test
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_require_scratch
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_require_btrfs_command "property"
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_require_fssum
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send_files_dir=$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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# Create a subvolume used for first full send test and used to create two
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# snapshots for the incremental send test.
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$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/sv1 | _filter_scratch
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# Create some test files.
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$XFS_IO_PROG -f -c "pwrite -S 0xf1 0 64K" $SCRATCH_MNT/sv1/foo >>$seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0x7b 0 90K" $SCRATCH_MNT/sv1/bar >>$seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0xea 0 256K" $SCRATCH_MNT/sv1/baz >>$seqres.full
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# Flush the previous buffered writes, since setting a subvolume to RO mode
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# does not do it and we want to check if the data is correctly transmitted by
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# the send operations.
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sync
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# Keep an open file descriptor on file bar.
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exec 73<$SCRATCH_MNT/sv1/bar
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# While the file descriptor is open, delete the file, set the subvolume to
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# read-only mode and see if a full send operation succeeds.
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unlink $SCRATCH_MNT/sv1/bar
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$BTRFS_UTIL_PROG property set $SCRATCH_MNT/sv1 ro true
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$FSSUM_PROG -A -f -w $send_files_dir/sv1.fssum $SCRATCH_MNT/sv1
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$BTRFS_UTIL_PROG send -f $send_files_dir/sv1.send $SCRATCH_MNT/sv1 2>&1 \
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| _filter_scratch
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# Now that the we did the full send, close the file descriptor and set the
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# subvolume back to read-write mode.
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exec 73>&-
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$BTRFS_UTIL_PROG property set $SCRATCH_MNT/sv1 ro false
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# Now try an incremental send operation while there's an open file descriptor
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# for a file that was deleted from the send snapshot (while it was in read-write
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# mode).
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# Create a snapshot of the subvolume, to be used later as the parent snapshot
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# for an incremental send operation.
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT/sv1 $SCRATCH_MNT/snap1 \
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| _filter_scratch
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# First do a full send of this snapshot.
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$FSSUM_PROG -A -f -w $send_files_dir/snap1.fssum $SCRATCH_MNT/snap1
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$BTRFS_UTIL_PROG send -f $send_files_dir/snap1.send $SCRATCH_MNT/snap1 2>&1 \
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| _filter_scratch
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# Modify file baz, to check that the incremental send operation does not miss
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# that this file has changed.
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$XFS_IO_PROG -c "pwrite -S 0x19 4K 8K" $SCRATCH_MNT/sv1/baz >>$seqres.full
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# Create a second snapshot of the subvolume, to be used later as the send
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# snapshot of an incremental send operation.
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT/sv1 $SCRATCH_MNT/snap2 \
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| _filter_scratch
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# Temporarily turn the second snapshot to read-write mode and then open a file
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# descriptor on its foo file.
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$BTRFS_UTIL_PROG property set $SCRATCH_MNT/snap2 ro false
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exec 73<$SCRATCH_MNT/snap2/foo
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# Delete the foo file from the second snapshot while holding the file descriptor
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# open.
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unlink $SCRATCH_MNT/snap2/foo
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# Set the second snapshot back to RO mode, so that we can use it for the
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# incremental send operation.
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$BTRFS_UTIL_PROG property set $SCRATCH_MNT/snap2 ro true
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# Do the incremental send while there's an open file descriptor on file foo from
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# the second snapshot.
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$FSSUM_PROG -A -f -w $send_files_dir/snap2.fssum $SCRATCH_MNT/snap2
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$BTRFS_UTIL_PROG send -f $send_files_dir/snap2.send -p $SCRATCH_MNT/snap1 \
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$SCRATCH_MNT/snap2 2>&1 | _filter_scratch
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# Now that the incremental send is done close the file descriptor on snap2/foo.
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exec 73>&-
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# Recreate the filesystem using the send streams and check all files exist,
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# except for the ones we deleted while holding an open file descriptor on them,
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# and with correct data and metadata (size, timestamps, ownership, permissions).
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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/sv1.send $SCRATCH_MNT
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$FSSUM_PROG -r $send_files_dir/sv1.fssum $SCRATCH_MNT/sv1
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$BTRFS_UTIL_PROG receive -f $send_files_dir/snap1.send $SCRATCH_MNT
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$FSSUM_PROG -r $send_files_dir/snap1.fssum $SCRATCH_MNT/snap1
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$BTRFS_UTIL_PROG receive -f $send_files_dir/snap2.send $SCRATCH_MNT
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$FSSUM_PROG -r $send_files_dir/snap2.fssum $SCRATCH_MNT/snap2
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status=0
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exit
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