ZTS/alloc_class: move file_in_special_vdev to alloc_class.kshlib

Move the function into the shared library.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Christos Longros <chris.longros@gmail.com>
Closes #18584

tests/zfs-tests/tests/functional/alloc_class/alloc_class.kshlib

@@ -67,3 +67,37 @@ function display_status
 
 	return $ret
 }
+
+#
+# Verify the file identified by the input <inode> is written on a special vdev
+# According to the pool layout used in this test vdev_id 3 and 4 are special
+#
+function file_in_special_vdev # <dataset> <inode>
+{
+	typeset dataset="$1"
+	typeset inum="$2"
+	typeset num_normal=$(echo $ZPOOL_DISKS | wc -w)
+	num_normal=${num_normal##* }
+
+	zdb -dddddd $dataset $inum | awk -v d=$num_normal '{
+# find DVAs from string "offset level dva" only for L0 (data) blocks
+if (match($0,"L0 [0-9]+")) {
+   dvas[0]=$3
+   dvas[1]=$4
+   dvas[2]=$5
+   for (i = 0; i < 3; ++i) {
+      if (match(dvas[i],"([^:]+):.*")) {
+         dva = substr(dvas[i], RSTART, RLENGTH);
+         # parse DVA from string "vdev:offset:asize"
+         if (split(dva,arr,":") != 3) {
+            print "Error parsing DVA: <" dva ">";
+            exit 1;
+         }
+         # verify vdev is "special"
+         if (arr[1] < d) {
+            exit 1;
+         }
+      }
+   }
+}}'
+}

tests/zfs-tests/tests/functional/alloc_class/alloc_class_012_pos.ksh

@@ -25,41 +25,6 @@
 
 verify_runnable "global"
 
-#
-# Verify the file identified by the input <inode> is written on a special vdev
-# According to the pool layout used in this test vdev_id 3 and 4 are special
-# XXX: move this function to libtest.shlib once we get "Vdev Properties"
-#
-function file_in_special_vdev # <dataset> <inode>
-{
-	typeset dataset="$1"
-	typeset inum="$2"
-	typeset num_normal=$(echo $ZPOOL_DISKS | wc -w)
-	num_normal=${num_normal##* }
-
-	zdb -dddddd $dataset $inum | awk -v d=$num_normal '{
-# find DVAs from string "offset level dva" only for L0 (data) blocks
-if (match($0,"L0 [0-9]+")) {
-   dvas[0]=$3
-   dvas[1]=$4
-   dvas[2]=$5
-   for (i = 0; i < 3; ++i) {
-      if (match(dvas[i],"([^:]+):.*")) {
-         dva = substr(dvas[i], RSTART, RLENGTH);
-         # parse DVA from string "vdev:offset:asize"
-         if (split(dva,arr,":") != 3) {
-            print "Error parsing DVA: <" dva ">";
-            exit 1;
-         }
-         # verify vdev is "special"
-         if (arr[1] < d) {
-            exit 1;
-         }
-      }
-   }
-}}'
-}
-
 #
 # Check that device removal works for special class vdevs
 #