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+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2021 Facebook, Inc. All Rights Reserved.
+#
+# 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
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+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
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@bur.io> --- 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