test: force mkfs.btrfs to overwrite any existing file systems

mkfs.btrfs (unlike mkfs.ext4) checks if the target already contains
a file system and refuses to continue if so. This causes spurious fails
in case the random garbage on the temporary device matches a valid FS
header:

[   19.723806] testsuite-64.sh[355]: + udevadm lock --device=/dev/mapper/encbtrfs0 --device=/dev/mapper/encbtrfs1 --device=/dev/mapper/encbtrfs2 --device=/dev/mapper/encbtrfs3 mkfs.btrfs -M -d raid1 -m raid1 -L btrfs_mencdisk -U deadbeef-dead-dead-beef-000000000003 /dev/mapper/encbtrfs0 /dev/mapper/encbtrfs1 /dev/mapper/encbtrfs2 /dev/mapper/encbtrfs3
[   19.918934] testsuite-64.sh[2494]: ERROR: /dev/mapper/encbtrfs0 appears to contain an existing filesystem (hfsplus)
[   19.920490] testsuite-64.sh[2494]: ERROR: use the -f option to force overwrite of /dev/mapper/encbtrfs0

Let's force mkfs.btrfs to overwrite the file system in such case.

diff --git a/test/units/testsuite-64.sh b/test/units/testsuite-64.sh
index 4d73c57aeb518cc7b9c7d88109fb19e9603dcdc2..fbab282334e38bb28b98228fdf8906cbb605ba2f 100755 (executable)
--- a/test/units/testsuite-64.sh
+++ b/test/units/testsuite-64.sh
@@ -646,7 +646,7 @@ testcase_btrfs_basic() {
     echo "Single device: default settings"
     uuid="deadbeef-dead-dead-beef-000000000000"
     label="btrfs_root"
-    udevadm lock --device="${devices[0]}" mkfs.btrfs -L "$label" -U "$uuid" "${devices[0]}"
+    udevadm lock --device="${devices[0]}" mkfs.btrfs -f -L "$label" -U "$uuid" "${devices[0]}"
     udevadm wait --settle --timeout=30 "${devices[0]}" "/dev/disk/by-uuid/$uuid" "/dev/disk/by-label/$label"
     btrfs filesystem show
     helper_check_device_symlinks
@@ -664,7 +664,7 @@ name="diskpart3", size=85M
 name="diskpart4", size=85M
 EOF
     udevadm wait --settle --timeout=30 /dev/disk/by-partlabel/diskpart{1..4}
-    udevadm lock --device="${devices[0]}" mkfs.btrfs -d single -m raid1 -L "$label" -U "$uuid" /dev/disk/by-partlabel/diskpart{1..4}
+    udevadm lock --device="${devices[0]}" mkfs.btrfs -f -d single -m raid1 -L "$label" -U "$uuid" /dev/disk/by-partlabel/diskpart{1..4}
     udevadm wait --settle --timeout=30 "/dev/disk/by-uuid/$uuid" "/dev/disk/by-label/$label"
     btrfs filesystem show
     helper_check_device_symlinks
@@ -680,7 +680,7 @@ EOF
             --device=/dev/disk/by-id/ata-foobar_deadbeefbtrfs1 \
             --device=/dev/disk/by-id/ata-foobar_deadbeefbtrfs2 \
             --device=/dev/disk/by-id/ata-foobar_deadbeefbtrfs3 \
-            mkfs.btrfs -M -d raid10 -m raid10 -L "$label" -U "$uuid" "${devices[@]}"
+            mkfs.btrfs -f -M -d raid10 -m raid10 -L "$label" -U "$uuid" "${devices[@]}"
     udevadm wait --settle --timeout=30 "/dev/disk/by-uuid/$uuid" "/dev/disk/by-label/$label"
     btrfs filesystem show
     helper_check_device_symlinks
@@ -720,7 +720,7 @@ EOF
             --device=/dev/mapper/encbtrfs1 \
             --device=/dev/mapper/encbtrfs2 \
             --device=/dev/mapper/encbtrfs3 \
-            mkfs.btrfs -M -d raid1 -m raid1 -L "$label" -U "$uuid" /dev/mapper/encbtrfs{0..3}
+            mkfs.btrfs -f -M -d raid1 -m raid1 -L "$label" -U "$uuid" /dev/mapper/encbtrfs{0..3}
     udevadm wait --settle --timeout=30 "/dev/disk/by-uuid/$uuid" "/dev/disk/by-label/$label"
     btrfs filesystem show
     helper_check_device_symlinks