btrfs-progs: tests: check if enqueued replace over replace waits

Signed-off-by: David Sterba <[email protected]>

tests/misc-tests/058-replace-start-enqueue/test.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# Check that an enqueued replace over another replace will wait
+
+source "$TEST_TOP/common" || exit
+
+check_prereq mkfs.btrfs
+check_prereq btrfs
+
+setup_root_helper
+setup_loopdevs 6
+prepare_loopdevs
+
+TEST_DEV=${loopdevs[1]}
+REPLACE1=${loopdevs[6]}
+REPLACE2=${loopdevs[5]}
+
+# Use striped profile so all devices are at least partially filled
+run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f -d raid0 -m raid0 "${loopdevs[@]}"
+run_check_mount_test_dev
+# Remove the devices and then use them for replace
+run_check $SUDO_HELPER "$TOP/btrfs" device remove "$REPLACE1" "$TEST_MNT"
+run_check $SUDO_HELPER "$TOP/btrfs" device remove "$REPLACE2" "$TEST_MNT"
+
+for i in `seq 48`; do
+	run_check $SUDO_HELPER dd if=/dev/zero of="$TEST_MNT/file$i" bs=1M count=128 status=noxfer
+done
+# Sync so replace start does not block in unwritten IO
+run_check "$TOP/btrfs" filesystem sync "$TEST_MNT"
+run_check "$TOP/btrfs" filesystem usage -T "$TEST_MNT"
+
+# Go background, should not be that fast, estimated 10 seconds
+run_check $SUDO_HELPER "$TOP/btrfs" replace start 2 "$REPLACE1" "$TEST_MNT"
+run_check sleep 1
+# No background, should wait
+run_check $SUDO_HELPER "$TOP/btrfs" replace start --enqueue 3 "$REPLACE2" "$TEST_MNT"
+run_check $SUDO_HELPER "$TOP/btrfs" replace status "$TEST_MNT"
+
+run_check "$TOP/btrfs" filesystem sync "$TEST_MNT"
+run_check "$TOP/btrfs" filesystem usage -T "$TEST_MNT"
+run_check $SUDO_HELPER "$TOP/btrfs" replace status "$TEST_MNT"
+
+run_check_umount_test_dev
+
+cleanup_loopdevs