+#!/bin/ksh
+
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source. A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright (c) 2019 by Lawrence Livermore National Security, LLC.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/rsend/rsend.kshlib
+
+#
+# Description:
+# Verify spill blocks are correctly preserved.
+#
+# Strategy:
+# 1) Create a set of files each containing some file data.
+# 2) Add enough xattrs to the file to require a spill block.
+# 3) Snapshot and send these files to a new dataset.
+# 4) Modify the files and spill blocks in a variety of ways.
+# 5) Send the changes using an incremental send stream.
+# 6) Verify that all the xattrs (and thus the spill block) were
+# preserved when receiving the incremental stream.
+#
+
+verify_runnable "both"
+
+log_assert "Verify spill blocks are correctly preserved"
+
+function cleanup
+{
+ rm -f $BACKDIR/fs@*
+ destroy_dataset $POOL/fs "-rR"
+ destroy_dataset $POOL/newfs "-rR"
+}
+
+attrvalue="abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"
+
+log_onexit cleanup
+
+log_must zfs create $POOL/fs
+log_must zfs set xattr=sa $POOL/fs
+log_must zfs set dnodesize=legacy $POOL/fs
+log_must zfs set recordsize=128k $POOL/fs
+
+# Create 40 files each with a spill block containing xattrs. Each file
+# will be modified in a different way to validate the incremental receive.
+for i in {1..40}; do
+ file="/$POOL/fs/file$i"
+
+ log_must mkfile 16384 $file
+ for j in {1..20}; do
+ log_must attr -qs "testattr$j" -V "$attrvalue" $file
+ done
+done
+
+# Snapshot the pool and send it to the new dataset.
+log_must zfs snapshot $POOL/fs@snap1
+log_must eval "zfs send -e $POOL/fs@snap1 >$BACKDIR/fs@snap1"
+log_must eval "zfs recv $POOL/newfs < $BACKDIR/fs@snap1"
+
+#
+# Modify file[1-6]'s contents but not the spill blocks.
+#
+# file1 - Increase record size; single block
+# file2 - Increase record size; multiple blocks
+# file3 - Truncate file to zero size; single block
+# file4 - Truncate file to smaller size; single block
+# file5 - Truncate file to much larger size; add holes
+# file6 - Truncate file to embedded size; embedded data
+#
+log_must mkfile 32768 /$POOL/fs/file1
+log_must mkfile 1048576 /$POOL/fs/file2
+log_must truncate -s 0 /$POOL/fs/file3
+log_must truncate -s 8192 /$POOL/fs/file4
+log_must truncate -s 1073741824 /$POOL/fs/file5
+log_must truncate -s 50 /$POOL/fs/file6
+
+#
+# Modify file[11-16]'s contents and their spill blocks.
+#
+# file11 - Increase record size; single block
+# file12 - Increase record size; multiple blocks
+# file13 - Truncate file to zero size; single block
+# file14 - Truncate file to smaller size; single block
+# file15 - Truncate file to much larger size; add holes
+# file16 - Truncate file to embedded size; embedded data
+#
+log_must mkfile 32768 /$POOL/fs/file11
+log_must mkfile 1048576 /$POOL/fs/file12
+log_must truncate -s 0 /$POOL/fs/file13
+log_must truncate -s 8192 /$POOL/fs/file14
+log_must truncate -s 1073741824 /$POOL/fs/file15
+log_must truncate -s 50 /$POOL/fs/file16
+
+for i in {11..20}; do
+ log_must attr -qr testattr1 /$POOL/fs/file$i
+done
+
+#
+# Modify file[21-26]'s contents and remove their spill blocks.
+#
+# file21 - Increase record size; single block
+# file22 - Increase record size; multiple blocks
+# file23 - Truncate file to zero size; single block
+# file24 - Truncate file to smaller size; single block
+# file25 - Truncate file to much larger size; add holes
+# file26 - Truncate file to embedded size; embedded data
+#
+log_must mkfile 32768 /$POOL/fs/file21
+log_must mkfile 1048576 /$POOL/fs/file22
+log_must truncate -s 0 /$POOL/fs/file23
+log_must truncate -s 8192 /$POOL/fs/file24
+log_must truncate -s 1073741824 /$POOL/fs/file25
+log_must truncate -s 50 /$POOL/fs/file26
+
+for i in {21..30}; do
+ for j in {1..20}; do
+ log_must attr -qr testattr$j /$POOL/fs/file$i
+ done
+done
+
+#
+# Modify file[31-40]'s spill blocks but not the file contents.
+#
+for i in {31..40}; do
+ file="/$POOL/fs/file$i"
+ log_must attr -qr testattr$(((RANDOM % 20) + 1)) $file
+ log_must attr -qs testattr$(((RANDOM % 20) + 1)) -V "$attrvalue" $file
+done
+
+# Calculate the expected recursive checksum for the source.
+expected_cksum=$(recursive_cksum /$POOL/fs)
+
+# Snapshot the pool and send the incremental snapshot.
+log_must zfs snapshot $POOL/fs@snap2
+log_must eval "zfs send -e -i $POOL/fs@snap1 $POOL/fs@snap2 >$BACKDIR/fs@snap2"
+log_must eval "zfs recv -F $POOL/newfs < $BACKDIR/fs@snap2"
+
+# Validate the received copy using the received recursive checksum.
+actual_cksum=$(recursive_cksum /$POOL/newfs)
+if [[ "$expected_cksum" != "$actual_cksum" ]]; then
+ log_fail "Checksums differ ($expected_cksum != $actual_cksum)"
+fi
+
+log_pass "Verify spill blocks are correctly preserved"