On Wed, Mar 16, 2022 at 01:25:13PM -0700, Boris Burkov wrote:
> There are some btrfs specific fsverity scenarios that don't map
> neatly onto the tests in generic/574 like holes, inline extents,
> and preallocated extents. Cover those in a btrfs specific test.
>
> This test relies on the btrfs implementation of fsverity in the patch:
> btrfs: initial fsverity support
>
> and on btrfs-corrupt-block for corruption in the patches titled:
> btrfs-progs: corrupt generic item data with btrfs-corrupt-block
> btrfs-progs: expand corrupt_file_extent in btrfs-corrupt-block
>
> Signed-off-by: Boris Burkov <boris@xxxxxx>
> ---
> tests/btrfs/290 | 168 ++++++++++++++++++++++++++++++++++++++++++++
> tests/btrfs/290.out | 25 +++++++
> 2 files changed, 193 insertions(+)
> create mode 100755 tests/btrfs/290
> create mode 100644 tests/btrfs/290.out
>
> diff --git a/tests/btrfs/290 b/tests/btrfs/290
> new file mode 100755
> index 00000000..f9acd55a
> --- /dev/null
> +++ b/tests/btrfs/290
> @@ -0,0 +1,168 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (C) 2021 Facebook, Inc. All Rights Reserved.
I noticed that all patches have 2021 in copyright statement, should be
updated to 2022?
And I'd like btrfs folks to help review these 2 btrfs specific tests.
Thanks,
Eryu
> +#
> +# FS QA Test 290
> +#
> +# Test btrfs support for fsverity.
> +# This test extends the generic fsverity testing by corrupting inline extents,
> +# preallocated extents, holes, and the Merkle descriptor in a btrfs-aware way.
> +#
> +. ./common/preamble
> +_begin_fstest auto quick verity
> +
> +# Import common functions.
> +. ./common/filter
> +. ./common/verity
> +
> +# real QA test starts here
> +_supported_fs btrfs
> +_require_scratch_verity
> +_require_scratch_nocheck
> +_require_odirect
> +_require_xfs_io_command "falloc"
> +_require_xfs_io_command "pread"
> +_require_xfs_io_command "pwrite"
> +_require_btrfs_corrupt_block
> +
> +get_ino() {
> + local file=$1
> + stat -c "%i" $file
> +}
> +
> +validate() {
> + local f=$1
> + local sz=$(_get_filesize $f)
> + # buffered io
> + echo $(basename $f)
> + $XFS_IO_PROG -rc "pread -q 0 $sz" $f 2>&1 | _filter_scratch
> + # direct io
> + $XFS_IO_PROG -rdc "pread -q 0 $sz" $f 2>&1 | _filter_scratch
> +}
> +
> +# corrupt the data portion of an inline extent
> +corrupt_inline() {
> + local f=$SCRATCH_MNT/inl
> + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 42" $f
> + local ino=$(get_ino $f)
> + _fsv_enable $f
> + _scratch_unmount
> + # inline data starts at disk_bytenr
> + # overwrite the first u64 with random bogus junk
> + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 0 -f disk_bytenr $SCRATCH_DEV > /dev/null 2>&1
> + _scratch_mount
> + validate $f
> +}
> +
> +# preallocate a file, then corrupt it by changing it to a regular file
> +corrupt_prealloc_to_reg() {
> + local f=$SCRATCH_MNT/prealloc
> + $XFS_IO_PROG -fc "falloc 0 12k" $f
> + local ino=$(get_ino $f)
> + _fsv_enable $f
> + _scratch_unmount
> + # set extent type from prealloc (2) to reg (1)
> + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 0 -f type -v 1 $SCRATCH_DEV >/dev/null 2>&1
> + _scratch_mount
> + validate $f
> +}
> +
> +# corrupt a regular file by changing the type to preallocated
> +corrupt_reg_to_prealloc() {
> + local f=$SCRATCH_MNT/reg
> + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f
> + local ino=$(get_ino $f)
> + _fsv_enable $f
> + _scratch_unmount
> + # set type from reg (1) to prealloc (2)
> + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 0 -f type -v 2 $SCRATCH_DEV >/dev/null 2>&1
> + _scratch_mount
> + validate $f
> +}
> +
> +# corrupt a file by punching a hole
> +corrupt_punch_hole() {
> + local f=$SCRATCH_MNT/punch
> + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f
> + local ino=$(get_ino $f)
> + # make a new extent in the middle, sync so the writes don't coalesce
> + $XFS_IO_PROG -c sync $SCRATCH_MNT
> + $XFS_IO_PROG -fc "pwrite -q -S 0x59 4096 4096" $f
> + _fsv_enable $f
> + _scratch_unmount
> + # change disk_bytenr to 0, representing a hole
> + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 4096 -f disk_bytenr -v 0 $SCRATCH_DEV > /dev/null 2>&1
> + _scratch_mount
> + validate $f
> +}
> +
> +# plug hole
> +corrupt_plug_hole() {
> + local f=$SCRATCH_MNT/plug
> + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f
> + local ino=$(get_ino $f)
> + $XFS_IO_PROG -fc "falloc 4k 4k" $f
> + _fsv_enable $f
> + _scratch_unmount
> + # change disk_bytenr to some value, plugging the hole
> + $BTRFS_CORRUPT_BLOCK_PROG -i $ino -x 4096 -f disk_bytenr -v 13639680 $SCRATCH_DEV > /dev/null 2>&1
> + _scratch_mount
> + validate $f
> +}
> +
> +# corrupt the fsverity descriptor item indiscriminately (causes EINVAL)
> +corrupt_verity_descriptor() {
> + local f=$SCRATCH_MNT/desc
> + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f
> + local ino=$(get_ino $f)
> + _fsv_enable $f
> + _scratch_unmount
> + # key for the descriptor item is <inode, BTRFS_VERITY_DESC_ITEM_KEY, 1>,
> + # 88 is X. So we write 5 Xs to the start of the descriptor
> + $BTRFS_CORRUPT_BLOCK_PROG -r 5 -I $ino,36,1 -v 88 -o 0 -b 5 $SCRATCH_DEV > /dev/null 2>&1
> + _scratch_mount
> + validate $f
> +}
> +
> +# specifically target the root hash in the descriptor (causes EIO)
> +corrupt_root_hash() {
> + local f=$SCRATCH_MNT/roothash
> + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f
> + local ino=$(get_ino $f)
> + _fsv_enable $f
> + _scratch_unmount
> + $BTRFS_CORRUPT_BLOCK_PROG -r 5 -I $ino,36,1 -v 88 -o 16 -b 1 $SCRATCH_DEV > /dev/null 2>&1
> + _scratch_mount
> + validate $f
> +}
> +
> +# corrupt the Merkle tree data itself
> +corrupt_merkle_tree() {
> + local f=$SCRATCH_MNT/merkle
> + $XFS_IO_PROG -fc "pwrite -q -S 0x58 0 12288" $f
> + local ino=$(get_ino $f)
> + _fsv_enable $f
> + _scratch_unmount
> + # key for the descriptor item is <inode, BTRFS_VERITY_MERKLE_ITEM_KEY, 0>,
> + # 88 is X. So we write 5 Xs to somewhere in the middle of the first
> + # merkle item
> + $BTRFS_CORRUPT_BLOCK_PROG -r 5 -I $ino,37,0 -v 88 -o 100 -b 5 $SCRATCH_DEV > /dev/null 2>&1
> + _scratch_mount
> + validate $f
> +}
> +
> +# real QA test starts here
> +_scratch_mkfs >/dev/null
> +_scratch_mount
> +
> +corrupt_inline
> +corrupt_prealloc_to_reg
> +corrupt_reg_to_prealloc
> +corrupt_punch_hole
> +corrupt_plug_hole
> +corrupt_verity_descriptor
> +corrupt_root_hash
> +corrupt_merkle_tree
> +
> +status=0
> +exit
> diff --git a/tests/btrfs/290.out b/tests/btrfs/290.out
> new file mode 100644
> index 00000000..056b114b
> --- /dev/null
> +++ b/tests/btrfs/290.out
> @@ -0,0 +1,25 @@
> +QA output created by 290
> +inl
> +pread: Input/output error
> +pread: Input/output error
> +prealloc
> +pread: Input/output error
> +pread: Input/output error
> +reg
> +pread: Input/output error
> +pread: Input/output error
> +punch
> +pread: Input/output error
> +pread: Input/output error
> +plug
> +pread: Input/output error
> +pread: Input/output error
> +desc
> +SCRATCH_MNT/desc: Invalid argument
> +SCRATCH_MNT/desc: Invalid argument
> +roothash
> +pread: Input/output error
> +pread: Input/output error
> +merkle
> +pread: Input/output error
> +pread: Input/output error
> --
> 2.31.0
