From fd4231f63897b6d3cc09dff9d19df0d02e326519 Mon Sep 17 00:00:00 2001
From: David Teigland <teigland@redhat.com>
Date: Fri, 3 Sep 2021 11:46:33 -0500
Subject: event activation switch

During startup, a new service lvm-activate-vgs will run
at a fixed point in time to activate all complete VGs.
At the same time it enables the pvscan/vgchange in the
lvm udev rule to begin event based autoactivation for
VGs that become complete after lvm-activate-vgs.
---
 scripts/lvm-activate-vgs-last.service | 15 +++++++++++++++
 scripts/lvm-activate-vgs-main.service | 16 ++++++++++++++++
 udev/69-dm-lvm-metad.rules.in         |  2 +-
 udev/69-dm-lvm.rules.in               |  2 +-
 4 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 scripts/lvm-activate-vgs-last.service
 create mode 100644 scripts/lvm-activate-vgs-main.service

diff --git a/scripts/lvm-activate-vgs-last.service b/scripts/lvm-activate-vgs-last.service
new file mode 100644
index 000000000..42287d1b5
--- /dev/null
+++ b/scripts/lvm-activate-vgs-last.service
@@ -0,0 +1,15 @@
+[Unit]
+Description=Activate LVM Volume Groups (last)
+Documentation=man:vgchange(8)
+After=lvm-activate-vgs.service multipathd.service cryptsetup.target
+Before=local-fs-pre.target shutdown.target
+DefaultDependencies=no
+Conflicts=shutdown.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/sbin/lvm vgchange -aay --vgonline --config devices/hints=none --eventactivation enable
+RemainAfterExit=yes
+
+[Install]
+WantedBy=sysinit.target
diff --git a/scripts/lvm-activate-vgs-main.service b/scripts/lvm-activate-vgs-main.service
new file mode 100644
index 000000000..9d4d5486b
--- /dev/null
+++ b/scripts/lvm-activate-vgs-main.service
@@ -0,0 +1,16 @@
+[Unit]
+Description=Activate LVM Volume Groups
+Documentation=man:vgchange(8)
+After=dm-event.socket dm-event.service
+Wants=systemd-udev-settle.service
+Before=local-fs-pre.target shutdown.target
+DefaultDependencies=no
+Conflicts=shutdown.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/sbin/lvm vgchange -aay --vgonline --config devices/hints=none
+RemainAfterExit=yes
+
+[Install]
+WantedBy=sysinit.target
diff --git a/udev/69-dm-lvm-metad.rules.in b/udev/69-dm-lvm-metad.rules.in
index 78f506520..4727cefc0 100644
--- a/udev/69-dm-lvm-metad.rules.in
+++ b/udev/69-dm-lvm-metad.rules.in
@@ -121,6 +121,6 @@ LABEL="direct_pvscan"
 #  MD    |          |      X      |       X*       |                   |
 #  loop  |          |      X      |       X*       |                   |
 #  other |    X     |             |       X        |                   |   X
-RUN+="(LVM_EXEC)/lvm pvscan --background --cache --activate ay --major $major --minor $minor", ENV{LVM_SCANNED}="1"
+RUN+="(LVM_EXEC)/lvm pvscan --background --cache --activate ay --eventactivation check --major $major --minor $minor", ENV{LVM_SCANNED}="1"
 
 LABEL="lvm_end"
diff --git a/udev/69-dm-lvm.rules.in b/udev/69-dm-lvm.rules.in
index 70f2b37e8..5aeb26cac 100644
--- a/udev/69-dm-lvm.rules.in
+++ b/udev/69-dm-lvm.rules.in
@@ -79,7 +79,7 @@ ENV{SYSTEMD_READY}="1"
 # TODO: adjust the output of vgchange -aay so that
 # it's better suited to appearing in the journal.
 
-IMPORT{program}="(LVM_EXEC)/lvm pvscan --cache --listvg --checkcomplete --vgonline --udevoutput --journal=output $env{DEVNAME}"
+IMPORT{program}="(LVM_EXEC)/lvm pvscan --cache --listvg --checkcomplete --vgonline --eventactivation check --udevoutput --journal=output $env{DEVNAME}"
 ENV{LVM_VG_NAME_COMPLETE}=="?*", RUN+="/usr/bin/systemd-run -r --no-block --property DefaultDependencies=no --unit lvm-activate-$env{LVM_VG_NAME_COMPLETE} lvm vgchange -aay --config devices/hints=none $env{LVM_VG_NAME_COMPLETE}"
 GOTO="lvm_end"
 
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