From 2a6d827e7a358d39cc033961458bbdad604f27d7 Mon Sep 17 00:00:00 2001
From: Zach Brown <zab@versity.com>
Date: Tue, 14 Mar 2023 11:38:38 -0700
Subject: [PATCH] Add test for changing devices

Add a relatively small initial test for swapping devices around.

Signed-off-by: Zach Brown <zab@versity.com>
---
 tests/golden/change-devices   | 27 +++++++++++++
 tests/sequence                |  1 +
 tests/tests/change-devices.sh | 76 +++++++++++++++++++++++++++++++++++
 3 files changed, 104 insertions(+)
 create mode 100644 tests/golden/change-devices
 create mode 100644 tests/tests/change-devices.sh

diff --git a/tests/golden/change-devices b/tests/golden/change-devices
new file mode 100644
index 00000000..46f68e48
--- /dev/null
+++ b/tests/golden/change-devices
@@ -0,0 +1,27 @@
+== make tmp sparse data dev files
+== make scratch fs
+== small new data device fails
+rc: 1
+== check sees data device errors
+rc: 1
+rc: 0
+== preparing while mounted fails
+rc: 1
+== preparing without recovery fails
+rc: 1
+== check sees metadata errors
+rc: 1
+rc: 1
+== preparing with file data fails
+rc: 1
+== preparing after emptied
+rc: 0
+== checks pass
+rc: 0
+rc: 0
+== using prepared
+== preparing larger and resizing
+rc: 0
+equal_prepared
+large_prepared
+resized larger test rc: 0
diff --git a/tests/sequence b/tests/sequence
index 9a5298a0..0bbf6315 100644
--- a/tests/sequence
+++ b/tests/sequence
@@ -36,6 +36,7 @@ cross-mount-data-free.sh
 persistent-item-vers.sh
 setup-error-teardown.sh
 resize-devices.sh
+change-devices.sh
 fence-and-reclaim.sh
 orphan-inodes.sh
 mount-unmount-race.sh
diff --git a/tests/tests/change-devices.sh b/tests/tests/change-devices.sh
new file mode 100644
index 00000000..c346161f
--- /dev/null
+++ b/tests/tests/change-devices.sh
@@ -0,0 +1,76 @@
+#
+# test changing devices
+#
+
+echo "== make tmp sparse data dev files"
+sz=$(blockdev --getsize64 "$T_EX_DATA_DEV")
+large_sz=$((sz * 2))
+touch "$T_TMP."{small,equal,large}
+truncate -s 1MB "$T_TMP.small"
+truncate -s $sz "$T_TMP.equal"
+truncate -s $large_sz "$T_TMP.large"
+
+echo "== make scratch fs"
+t_quiet scoutfs mkfs -f -Q 0,127.0.0.1,53000 "$T_EX_META_DEV" "$T_EX_DATA_DEV"
+SCR="$T_TMPDIR/mnt.scratch"
+mkdir -p "$SCR"
+
+echo "== small new data device fails"
+t_rc scoutfs prepare-empty-data-device "$T_EX_META_DEV" "$T_TMP.small"
+
+echo "== check sees data device errors"
+t_rc scoutfs prepare-empty-data-device --check "$T_EX_META_DEV" "$T_TMP.small"
+t_rc scoutfs prepare-empty-data-device --check "$T_EX_META_DEV"
+
+echo "== preparing while mounted fails"
+mount -t scoutfs -o metadev_path=$T_EX_META_DEV,quorum_slot_nr=0 "$T_EX_DATA_DEV" "$SCR"
+t_rc scoutfs prepare-empty-data-device "$T_EX_META_DEV" "$T_TMP.equal"
+umount "$SCR"
+
+echo "== preparing without recovery fails"
+mount -t scoutfs -o metadev_path=$T_EX_META_DEV,quorum_slot_nr=0 "$T_EX_DATA_DEV" "$SCR"
+umount -f "$SCR"
+t_rc scoutfs prepare-empty-data-device "$T_EX_META_DEV" "$T_TMP.equal"
+
+echo "== check sees metadata errors"
+t_rc scoutfs prepare-empty-data-device --check "$T_EX_META_DEV"
+t_rc scoutfs prepare-empty-data-device --check "$T_EX_META_DEV" "$T_TMP.equal"
+
+echo "== preparing with file data fails"
+mount -t scoutfs -o metadev_path=$T_EX_META_DEV,quorum_slot_nr=0 "$T_EX_DATA_DEV" "$SCR"
+echo hi > "$SCR"/file
+umount "$SCR"
+scoutfs print "$T_EX_META_DEV" > "$T_TMP.print"
+t_rc scoutfs prepare-empty-data-device "$T_EX_META_DEV" "$T_TMP.equal"
+
+echo "== preparing after emptied"
+mount -t scoutfs -o metadev_path=$T_EX_META_DEV,quorum_slot_nr=0 "$T_EX_DATA_DEV" "$SCR"
+rm -f "$SCR"/file
+umount "$SCR"
+t_rc scoutfs prepare-empty-data-device "$T_EX_META_DEV" "$T_TMP.equal"
+
+echo "== checks pass"
+t_rc scoutfs prepare-empty-data-device --check "$T_EX_META_DEV"
+t_rc scoutfs prepare-empty-data-device --check "$T_EX_META_DEV" "$T_TMP.equal"
+
+echo "== using prepared"
+scr_loop=$(losetup --find --show "$T_TMP.equal")
+mount -t scoutfs -o metadev_path=$T_EX_META_DEV,quorum_slot_nr=0 "$scr_loop" "$SCR"
+touch "$SCR"/equal_prepared
+equal_tot=$(scoutfs statfs -s total_data_blocks -p "$SCR")
+umount "$SCR"
+losetup -d "$scr_loop"
+
+echo "== preparing larger and resizing"
+t_rc scoutfs prepare-empty-data-device "$T_EX_META_DEV" "$T_TMP.large"
+scr_loop=$(losetup --find --show "$T_TMP.large")
+mount -t scoutfs -o metadev_path=$T_EX_META_DEV,quorum_slot_nr=0 "$scr_loop" "$SCR"
+touch "$SCR"/large_prepared
+ls "$SCR"
+scoutfs resize-devices -p "$SCR" -d $large_sz
+large_tot=$(scoutfs statfs -s total_data_blocks -p "$SCR")
+test "$large_tot" -gt "$equal_tot" ; echo "resized larger test rc: $?"
+umount "$SCR"
+losetup -d "$scr_loop"
+
+t_pass