From 39f83dd7606730f65eb9831703a8ea3667682a85 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 19 Jan 2022 15:48:20 +0900
Subject: [PATCH] test: wait for newly created btrfs triggered

Fixes the second issue in #21819.
---
 test/units/testsuite-64.sh | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/test/units/testsuite-64.sh b/test/units/testsuite-64.sh
index f75382d90a..9ee3699ea8 100755
--- a/test/units/testsuite-64.sh
+++ b/test/units/testsuite-64.sh
@@ -390,6 +390,10 @@ testcase_btrfs_basic() {
     uuid="deadbeef-dead-dead-beef-000000000000"
     label="btrfs_root"
     mkfs.btrfs -L "$label" -U "$uuid" "${devices[0]}"
+    # We need to do some active waiting anyway, as it may take kernel a bit
+    # to trigger the newly created btrfs
+    helper_wait_for_dev "/dev/disk/by-uuid/$uuid"
+    helper_wait_for_dev "/dev/disk/by-label/$label"
     udevadm settle
     btrfs filesystem show
     test -e "/dev/disk/by-uuid/$uuid"
@@ -409,6 +413,8 @@ name="diskpart4", size=85M
 EOF
     udevadm settle
     mkfs.btrfs -d single -m raid1 -L "$label" -U "$uuid" /dev/disk/by-partlabel/diskpart{1..4}
+    helper_wait_for_dev "/dev/disk/by-uuid/$uuid"
+    helper_wait_for_dev "/dev/disk/by-label/$label"
     udevadm settle
     btrfs filesystem show
     test -e "/dev/disk/by-uuid/$uuid"
@@ -420,6 +426,8 @@ EOF
     uuid="deadbeef-dead-dead-beef-000000000002"
     label="btrfs_mdisk"
     mkfs.btrfs -M -d raid10 -m raid10 -L "$label" -U "$uuid" "${devices[@]}"
+    helper_wait_for_dev "/dev/disk/by-uuid/$uuid"
+    helper_wait_for_dev "/dev/disk/by-label/$label"
     udevadm settle
     btrfs filesystem show
     test -e "/dev/disk/by-uuid/$uuid"
@@ -457,6 +465,8 @@ EOF
     ls -l /dev/mapper/encbtrfs{0..3}
     # Create a multi-device btrfs filesystem on the LUKS devices
     mkfs.btrfs -M -d raid1 -m raid1 -L "$label" -U "$uuid" /dev/mapper/encbtrfs{0..3}
+    helper_wait_for_dev "/dev/disk/by-uuid/$uuid"
+    helper_wait_for_dev "/dev/disk/by-label/$label"
     udevadm settle
     btrfs filesystem show
     test -e "/dev/disk/by-uuid/$uuid"
@@ -483,6 +493,8 @@ EOF
     # Start the corresponding mount unit and check if the btrfs device was reconstructed
     # correctly
     systemctl start "${mpoint##*/}.mount"
+    helper_wait_for_dev "/dev/disk/by-uuid/$uuid"
+    helper_wait_for_dev "/dev/disk/by-label/$label"
     btrfs filesystem show
     test -e "/dev/disk/by-uuid/$uuid"
     test -e "/dev/disk/by-label/$label"
-- 
2.25.1