ZTS: redundancy_draid_spare1

Preserve the 'zpool status' output used to calculate the number of
checksum errors so it can be logged on failure.  Several instances have
been observed in the CI where cksum was set to a non-zero value, yet a
subsequent run of 'zpool status' on failure showed no checksum errors.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #18500

tests/zfs-tests/tests/functional/redundancy/redundancy.kshlib

@@ -435,32 +435,38 @@ function verify_draid_pool
 
 	log_note "verify_draid_pool $pool $replace_mode"
 	log_must zpool scrub -w $pool
+	sync_pool $pool true
 
-	typeset -i cksum=$(cksum_pool $pool)
+	typeset status=$(zpool status -p $pool)
+	typeset -i cksum=$(echo "$status" | awk '
+	    !NF { isvdev = 0 }
+	    isvdev { errors += $NF }
+	    /CKSUM$/ { isvdev = 1 }
+	    END { print errors }')
 
 	if [[ "$replace_mode" = "healing" ]]; then
 		if [[ $cksum -gt 0 ]]; then
-			log_must zpool status -v $pool
+			log_note "$status"
 			log_fail "Unexpected CKSUM errors found for $pool ($cksum)"
 		fi
 
 		if ! check_pool_status $pool "scan" "repaired 0B"; then
-			log_must zpool status -v $pool
+			log_note "$status"
 			log_fail "Unexpected repair IO found for $pool ($cksum)"
 		fi
 	elif [[ "$replace_mode" = "sequential" ]]; then
 		if [[ $cksum -gt 0 ]]; then
-			log_must zpool status -v $pool
+			log_note "$status"
 			log_fail "Unexpected CKSUM errors found for $pool ($cksum)"
 		fi
 	elif [[ "$replace_mode" = "damaged" ]]; then
 		if [[ $cksum -lt 1 ]]; then
-			log_must zpool status -v $pool
+			log_note "$status"
 			log_fail "Expected CKSUM errors missing for $pool ($cksum)"
 		fi
 
 		if check_pool_status $pool "scan" "repaired 0B"; then
-			log_must zpool status -v $pool
+			log_note "$status"
 			log_fail "Expected repair IO missing for $pool ($cksum)"
 		fi
 	else
@@ -468,12 +474,12 @@ function verify_draid_pool
 	fi
 
 	if ! check_pool_status $pool "scan" "with 0 errors"; then
-		log_must zpool status -v $pool
+		log_note "$status"
 		log_fail "Unexpected repair errors found for $pool"
 	fi
 
 	if ! check_pool_status $pool "errors" "No known data errors"; then
-		log_must zpool status -v $pool
+		log_note "$status"
 		log_fail "Unexpected data errors found for $pool"
 	fi
 }