ZTS: Add L1 corruption test

Add a new test case which corrupts all level 1 block in a file.
Then verifies that corruption is detected and repaired.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #11141

tests/runfiles/common.run

@@ -99,7 +99,8 @@ tests = ['tst.destroy_fs', 'tst.destroy_snap', 'tst.get_count_and_limit',
 tags = ['functional', 'channel_program', 'synctask_core']
 
 [tests/functional/checksum]
-tests = ['run_sha2_test', 'run_skein_test', 'filetest_001_pos']
+tests = ['run_sha2_test', 'run_skein_test', 'filetest_001_pos',
+    'filetest_002_pos']
 tags = ['functional', 'checksum']
 
 [tests/functional/clean_mirror]

tests/zfs-tests/tests/functional/checksum/Makefile.am

@@ -12,7 +12,8 @@ dist_pkgdata_SCRIPTS = \
 	run_edonr_test.ksh \
 	run_sha2_test.ksh \
 	run_skein_test.ksh \
-	filetest_001_pos.ksh
+	filetest_001_pos.ksh \
+	filetest_002_pos.ksh
 
 dist_pkgdata_DATA = \
 	default.cfg

tests/zfs-tests/tests/functional/checksum/filetest_001_pos.ksh

@@ -62,6 +62,7 @@ log_assert "Create and read back files with using different checksum algorithms"
 log_onexit cleanup
 
 WRITESZ=1048576
+NWRITES=5
 
 # Get a list of vdevs in our pool
 set -A array $(get_disklist_fullpath)
@@ -75,7 +76,7 @@ while [[ $i -lt ${#CHECKSUM_TYPES[*]} ]]; do
 	type=${CHECKSUM_TYPES[i]}
 	log_must zfs set checksum=$type $TESTPOOL
 	log_must file_write -o overwrite -f $TESTDIR/test_$type \
-	    -b $WRITESZ -c 5 -d R
+	    -b $WRITESZ -c $NWRITES -d R
 	(( i = i + 1 ))
 done
 
@@ -96,7 +97,7 @@ while [[ $j -lt ${#CHECKSUM_TYPES[*]} ]]; do
 	type=${CHECKSUM_TYPES[$j]}
 	log_must zfs set checksum=$type $TESTPOOL
 	log_must file_write -o overwrite -f $TESTDIR/test_$type \
-	    -b $WRITESZ -c 5 -d R
+	    -b $WRITESZ -c $NWRITES -d R
 
 	# Corrupt the level 0 blocks of this file
 	corrupt_blocks_at_level $TESTDIR/test_$type

tests/zfs-tests/tests/functional/checksum/filetest_002_pos.ksh

@@ -0,0 +1,91 @@
+#! /bin/ksh -p
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License (the "License").
+# You may not use this file except in compliance with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or http://www.opensolaris.org/os/licensing.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright (c) 2018, 2019 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/include/properties.shlib
+. $STF_SUITE/tests/functional/checksum/default.cfg
+
+# DESCRIPTION:
+# Sanity test to make sure checksum algorithms work.
+# For each checksum, create a file in the pool using that checksum.  Verify
+# that there are no checksum errors.  Next, for each checksum, create a single
+# file in the pool using that checksum, corrupt the file, and verify that we
+# correctly catch the checksum errors.
+#
+# STRATEGY:
+# Test 1
+# 1. For each checksum:
+# 2.	Create a file using the checksum
+# 3.	Corrupt all level 1 blocks in the file
+# 4.	Export and import the pool
+# 5.	Verify that there are checksum errors
+
+verify_runnable "both"
+
+function cleanup
+{
+	rm -fr $TESTDIR/*
+}
+
+log_assert "Test corrupting files at L1 and seeing checksum errors"
+
+log_onexit cleanup
+
+WRITESZ=1048576
+NWRITES=5
+
+# Get a list of vdevs in our pool
+set -A array $(get_disklist_fullpath)
+
+# Get the first vdev, since we will corrupt it later
+firstvdev=${array[0]}
+
+typeset -i j=1
+while [[ $j -lt ${#CHECKSUM_TYPES[*]} ]]; do
+	type=${CHECKSUM_TYPES[$j]}
+	log_must zfs set checksum=$type $TESTPOOL
+	log_must file_write -o overwrite -f $TESTDIR/test_$type \
+	    -b $WRITESZ -c $NWRITES -d R
+
+	# Corrupt the level 1 blocks of this file
+	corrupt_blocks_at_level $TESTDIR/test_$type 1
+
+	log_must zpool export $TESTPOOL
+	log_must zpool import $TESTPOOL
+
+	log_mustnot eval "cat $TESTDIR/test_$type >/dev/null"
+
+	cksum=$(zpool status -P -v $TESTPOOL | grep "$firstvdev" | \
+	    awk '{print $5}')
+
+	log_assert "Checksum '$type' caught $cksum checksum errors"
+	log_must [ $cksum -ne 0 ]
+
+	rm -f $TESTDIR/test_$type
+	log_must zpool clear $TESTPOOL
+
+	(( j = j + 1 ))
+done