git: b6da7f2fd127 - main - makefs/zfs tests: Add a test case which appends to a file after import

The branch main has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=b6da7f2fd127f447aa20843666b98d3a1d07b8c9

commit b6da7f2fd127f447aa20843666b98d3a1d07b8c9
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2023-09-28 20:25:06 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2023-09-28 20:36:12 +0000

    makefs/zfs tests: Add a test case which appends to a file after import
    
    MFC after:      1 week
    Sponsored by:   The FreeBSD Foundation
---
 usr.sbin/makefs/tests/makefs_zfs_tests.sh | 35 +++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/usr.sbin/makefs/tests/makefs_zfs_tests.sh b/usr.sbin/makefs/tests/makefs_zfs_tests.sh
index e8da4cc87055..9173600dc555 100644
--- a/usr.sbin/makefs/tests/makefs_zfs_tests.sh
+++ b/usr.sbin/makefs/tests/makefs_zfs_tests.sh
@@ -191,6 +191,40 @@ empty_fs_cleanup()
 	common_cleanup
 }
 
+atf_test_case file_extend cleanup
+file_extend_body()
+{
+	local i start
+
+	create_test_dirs
+
+	# Create a file slightly longer than the maximum block size.
+	start=132
+	dd if=/dev/random of=${TEST_INPUTS_DIR}/foo bs=1k count=$start
+	md5 -q ${TEST_INPUTS_DIR}/foo > foo.md5
+
+	atf_check $MAKEFS -s 10g -o rootpath=/ -o poolname=$ZFS_POOL_NAME \
+	    $TEST_IMAGE $TEST_INPUTS_DIR
+
+	import_image
+
+	check_image_contents
+
+	i=0
+	while [ $i -lt 1000 ]; do
+		dd if=/dev/random of=${TEST_MOUNT_DIR}/foo bs=1k count=1 \
+		    seek=$(($i + $start)) conv=notrunc
+		# Make sure that the first $start blocks are unmodified.
+		dd if=${TEST_MOUNT_DIR}/foo bs=1k count=$start of=foo.copy
+		atf_check -o file:foo.md5 md5 -q foo.copy
+		i=$(($i + 1))
+	done
+}
+file_extend_cleanup()
+{
+	common_cleanup
+}
+
 atf_test_case file_sizes cleanup
 file_sizes_body()
 {
@@ -699,6 +733,7 @@ atf_init_test_cases()
 	atf_add_test_case dataset_removal
 	atf_add_test_case empty_dir
 	atf_add_test_case empty_fs
+	atf_add_test_case file_extend
 	atf_add_test_case file_sizes
 	atf_add_test_case hard_links
 	atf_add_test_case indirect_dnode_array