From: Eric Biggers <ebiggers@xxxxxxxxxx>
This test corrupts various parts of the contents of a verity file, or
parts of its Merkle tree, by writing directly to the block device. It
verifies that this causes I/O errors when the relevant part of the
contents is later read by any means.
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
tests/generic/902 | 154 ++++++++++++++++++++++++++++++++++++++++++
tests/generic/902.out | 91 +++++++++++++++++++++++++
tests/generic/group | 1 +
3 files changed, 246 insertions(+)
create mode 100755 tests/generic/902
create mode 100644 tests/generic/902.out
diff --git a/tests/generic/902 b/tests/generic/902
new file mode 100755
index 00000000..5ef2cca1
--- /dev/null
+++ b/tests/generic/902
@@ -0,0 +1,154 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright 2018 Google LLC
+#
+# FS QA Test generic/902
+#
+# Test corrupting verity files. This test corrupts various parts of the
+# contents of a verity file, or parts of its Merkle tree, by writing directly to
+# the block device. It verifies that this causes I/O errors when the relevant
+# part of the contents is later read by any means.
+#
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ cd /
+ rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/verity
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_scratch_verity
+
+_scratch_mkfs_verity &>> $seqres.full
+_scratch_mount
+fsv_orig_file=$SCRATCH_MNT/file
+fsv_file=$SCRATCH_MNT/file.fsv
+
+setup_zeroed_file()
+{
+ local len=$1
+ local sparse=$2
+
+ if $sparse; then
+ dd if=/dev/zero of=$fsv_orig_file bs=1 count=0 seek=$len \
+ status=none
+ else
+ head -c $len /dev/zero > $fsv_orig_file
+ fi
+ cp $fsv_orig_file $fsv_file
+ _fsv_enable $fsv_file
+ md5sum $fsv_file |& _filter_scratch
+}
+
+filter_sigbus()
+{
+ sed -e 's/.*Bus error.*/Bus error/'
+}
+
+round_up_to_page_boundary()
+{
+ local n=$1
+ local page_size=$(get_page_size)
+
+ echo $(( (n + page_size - 1) & ~(page_size - 1) ))
+}
+
+corruption_test()
+{
+ local file_len=$1
+ local zap_offset=$2
+ local zap_len=$3
+ local is_merkle_tree=${4:-false} # if true, zap tree instead of data
+ local use_sparse_file=${5:-false}
+ local page_aligned_eof=$(round_up_to_page_boundary $file_len)
+ local measurement
+
+ if $is_merkle_tree; then
+ local corrupt_func=_fsv_scratch_corrupt_merkle_tree
+ else
+ local corrupt_func=_fsv_scratch_corrupt_bytes
+ fi
+
+ local msg="Corruption test:"
+ msg+=" file_len=$file_len"
+ if $use_sparse_file; then
+ msg+=" (sparse)"
+ fi
+ msg+=" zap_offset=$zap_offset"
+ if $is_merkle_tree; then
+ msg+=" (in Merkle tree)"
+ fi
+ msg+=" zap_len=$zap_len"
+
+ _fsv_scratch_begin_subtest "$msg"
+ setup_zeroed_file $file_len $use_sparse_file
+ cmp $fsv_file $fsv_orig_file
+ echo "Corrupting bytes..."
+ head -c $zap_len /dev/zero | tr '\0' X \
+ | $corrupt_func $fsv_file $zap_offset
+
+ echo "Validating corruption (reading full file)..."
+ _scratch_cycle_mount
+ md5sum $fsv_file |& _filter_scratch
+
+ echo "Validating corruption (direct I/O)..."
+ _scratch_cycle_mount
+ dd if=$fsv_file bs=$FSV_BLOCK_SIZE iflag=direct status=none \
+ of=/dev/null |& _filter_scratch
+
+ if ! $is_merkle_tree; then
+ echo "Validating corruption (reading just corrupted part)..."
+ dd if=$fsv_file bs=1 skip=$zap_offset count=$zap_len \
+ of=/dev/null status=none |& _filter_scratch
+ fi
+
+ echo "Validating corruption (reading full file via mmap)..."
+ bash -c "trap '' SIGBUS; $XFS_IO_PROG -r $fsv_file \
+ -c 'mmap -r 0 $page_aligned_eof' \
+ -c 'mread 0 $file_len'" |& filter_sigbus
+
+ if ! $is_merkle_tree; then
+ echo "Validating corruption (reading just corrupted part via mmap)..."
+ bash -c "trap '' SIGBUS; $XFS_IO_PROG -r $fsv_file \
+ -c 'mmap -r 0 $page_aligned_eof' \
+ -c 'mread $zap_offset $zap_len'" |& filter_sigbus
+ fi
+}
+
+corruption_test 131072 0 1
+corruption_test 131072 4095 1
+corruption_test 131072 65536 65536
+corruption_test 131072 131071 1
+
+# Non-zeroed bytes in the final partial block beyond EOF should cause reads to
+# fail too. Such bytes would be visible via mmap().
+corruption_test 130999 131000 72
+
+# Merkle tree corruption.
+corruption_test 200000 100 10 true
+
+# Sparse file. Corrupting the Merkle tree should still cause reads to fail,
+# i.e. the filesystem must verify holes.
+corruption_test 200000 100 10 true true
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/902.out b/tests/generic/902.out
new file mode 100644
index 00000000..15fe691e
--- /dev/null
+++ b/tests/generic/902.out
@@ -0,0 +1,91 @@
+QA output created by 902
+
+# Corruption test: file_len=131072 zap_offset=0 zap_len=1
+0dfbe8aa4c20b52e1b8bf3cb6cbdf193 SCRATCH_MNT/file.fsv
+Corrupting bytes...
+Validating corruption (reading full file)...
+md5sum: SCRATCH_MNT/file.fsv: Input/output error
+Validating corruption (direct I/O)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading just corrupted part)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading full file via mmap)...
+Bus error
+Validating corruption (reading just corrupted part via mmap)...
+Bus error
+
+# Corruption test: file_len=131072 zap_offset=4095 zap_len=1
+0dfbe8aa4c20b52e1b8bf3cb6cbdf193 SCRATCH_MNT/file.fsv
+Corrupting bytes...
+Validating corruption (reading full file)...
+md5sum: SCRATCH_MNT/file.fsv: Input/output error
+Validating corruption (direct I/O)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading just corrupted part)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading full file via mmap)...
+Bus error
+Validating corruption (reading just corrupted part via mmap)...
+Bus error
+
+# Corruption test: file_len=131072 zap_offset=65536 zap_len=65536
+0dfbe8aa4c20b52e1b8bf3cb6cbdf193 SCRATCH_MNT/file.fsv
+Corrupting bytes...
+Validating corruption (reading full file)...
+md5sum: SCRATCH_MNT/file.fsv: Input/output error
+Validating corruption (direct I/O)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading just corrupted part)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading full file via mmap)...
+Bus error
+Validating corruption (reading just corrupted part via mmap)...
+Bus error
+
+# Corruption test: file_len=131072 zap_offset=131071 zap_len=1
+0dfbe8aa4c20b52e1b8bf3cb6cbdf193 SCRATCH_MNT/file.fsv
+Corrupting bytes...
+Validating corruption (reading full file)...
+md5sum: SCRATCH_MNT/file.fsv: Input/output error
+Validating corruption (direct I/O)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading just corrupted part)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading full file via mmap)...
+Bus error
+Validating corruption (reading just corrupted part via mmap)...
+Bus error
+
+# Corruption test: file_len=130999 zap_offset=131000 zap_len=72
+f5cca0d7fbb8b02bc6118a9954d5d306 SCRATCH_MNT/file.fsv
+Corrupting bytes...
+Validating corruption (reading full file)...
+md5sum: SCRATCH_MNT/file.fsv: Input/output error
+Validating corruption (direct I/O)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading just corrupted part)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading full file via mmap)...
+Bus error
+Validating corruption (reading just corrupted part via mmap)...
+Bus error
+
+# Corruption test: file_len=200000 zap_offset=100 (in Merkle tree) zap_len=10
+4a1e4325031b13f933ac4f1db9ecb63f SCRATCH_MNT/file.fsv
+Corrupting bytes...
+Validating corruption (reading full file)...
+md5sum: SCRATCH_MNT/file.fsv: Input/output error
+Validating corruption (direct I/O)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading full file via mmap)...
+Bus error
+
+# Corruption test: file_len=200000 (sparse) zap_offset=100 (in Merkle tree) zap_len=10
+4a1e4325031b13f933ac4f1db9ecb63f SCRATCH_MNT/file.fsv
+Corrupting bytes...
+Validating corruption (reading full file)...
+md5sum: SCRATCH_MNT/file.fsv: Input/output error
+Validating corruption (direct I/O)...
+dd: error reading 'SCRATCH_MNT/file.fsv': Input/output error
+Validating corruption (reading full file via mmap)...
+Bus error
diff --git a/tests/generic/group b/tests/generic/group
index 003fbff4..ffdc7640 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -561,3 +561,4 @@
556 auto quick casefold
900 auto quick verity
901 auto quick verity
+902 auto quick verity
--
2.22.0.410.gd8fdbe21b5-goog
