Fix zpool status in case of unloaded keys

When scrubbing an encrypted filesystem with unloaded key still report an
error in zpool status.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alek Pinchuk <apinchuk@axcient.com>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #13675
Closes #13717

tests/zfs-tests/tests/Makefile.am

@@ -1161,6 +1161,7 @@ nobase_dist_datadir_zfs_tests_tests_SCRIPTS += \
 	functional/cli_root/zpool_status/zpool_status_002_pos.ksh \
 	functional/cli_root/zpool_status/zpool_status_003_pos.ksh \
 	functional/cli_root/zpool_status/zpool_status_004_pos.ksh \
+	functional/cli_root/zpool_status/zpool_status_005_pos.ksh \
 	functional/cli_root/zpool_status/zpool_status_features_001_pos.ksh \
 	functional/cli_root/zpool_sync/cleanup.ksh \
 	functional/cli_root/zpool_sync/setup.ksh \

tests/zfs-tests/tests/functional/cli_root/zpool_status/zpool_status_003_pos.ksh

@@ -63,6 +63,7 @@ log_must zfs snapshot $TESTPOOL2@snap
 log_must zfs clone $TESTPOOL2@snap $TESTPOOL2/clone
 
 # Look to see that snapshot, clone and filesystem our files report errors
+log_must zpool status -v $TESTPOOL2
 log_must eval "zpool status -v | grep '$TESTPOOL2@snap:/10m_file'"
 log_must eval "zpool status -v | grep '$TESTPOOL2/clone/10m_file'"
 log_must eval "zpool status -v | grep '$TESTPOOL2/10m_file'"

tests/zfs-tests/tests/functional/cli_root/zpool_status/zpool_status_004_pos.ksh

@@ -74,6 +74,7 @@ log_must eval "zpool status -v | grep '$TESTPOOL2/10m_file'"
 
 # Check that enabling the feature reports the error properly.
 log_must zpool set feature@head_errlog=enabled $TESTPOOL2
+log_must zpool status -v $TESTPOOL2
 log_must eval "zpool status -v | grep '$TESTPOOL2@snap:/10m_file'"
 log_must eval "zpool status -v | grep '$TESTPOOL2/clone/10m_file'"
 log_must eval "zpool status -v | grep '$TESTPOOL2/10m_file'"

tests/zfs-tests/tests/functional/cli_root/zpool_status/zpool_status_005_pos.ksh

@@ -0,0 +1,78 @@
+#!/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 https://opensource.org/licenses/CDDL-1.0.
+# 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) 2022 George Amanakis. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+#
+# DESCRIPTION:
+# Verify correct output with 'zpool status -v' after corrupting a file
+#
+# STRATEGY:
+# 1. Create a pool, an ancrypted filesystem and a file
+# 2. zinject checksum errors
+# 3. Unmount the filesystem and unload the key
+# 4. Scrub the pool
+# 5. Verify we report errors in the pool in 'zpool status -v'
+
+verify_runnable "both"
+
+DISK=${DISKS%% *}
+
+function cleanup
+{
+	log_must zinject -c all
+	destroy_pool $TESTPOOL2
+	rm -f $TESTDIR/vdev_a
+}
+
+log_assert "Verify reporting errors with unloaded keys works"
+log_onexit cleanup
+
+typeset passphrase="password"
+typeset file="/$TESTPOOL2/$TESTFS1/$TESTFILE0"
+
+truncate -s $MINVDEVSIZE $TESTDIR/vdev_a
+log_must zpool create -f -o feature@head_errlog=enabled $TESTPOOL2 $TESTDIR/vdev_a
+
+log_must eval "echo $passphrase > /$TESTPOOL2/pwd"
+
+log_must zfs create -o encryption=aes-256-ccm -o keyformat=passphrase \
+    -o keylocation=file:///$TESTPOOL2/pwd -o primarycache=none \
+    $TESTPOOL2/$TESTFS1
+
+log_must dd if=/dev/urandom of=$file bs=1024 count=1024 oflag=sync
+log_must eval "echo 'aaaaaaaa' >> "$file
+
+corrupt_blocks_at_level $file 0
+log_must zfs unmount $TESTPOOL2/$TESTFS1
+log_must zfs unload-key $TESTPOOL2/$TESTFS1
+log_must zpool sync $TESTPOOL2
+log_must zpool scrub $TESTPOOL2
+log_must zpool wait -t scrub $TESTPOOL2
+log_must zpool status -v $TESTPOOL2
+log_must eval "zpool status -v $TESTPOOL2 | \
+    grep \"Permanent errors have been detected\""
+
+log_pass "Verify reporting errors with unloaded keys works"