systemd: core/manager: run generators directly when we are in initrd

lvm with latest systemd and dracut doesn't boot up.
Upstream issues for reference:
  - dracut: dracutdevs/dracut#2211
  - systemd: systemd/systemd#26488

Temporary patch applied until this issue is resolved
systemd/systemd#26494

See systemd/systemd#26488 (comment)

Change-Id: I1964ff2a82b7c2d6c53e02b4368a8d5d6f9a03a1
Signed-off-by: Tapas Kundu <tkundu@vmware.com>
Reviewed-on: http://photon-jenkins.eng.vmware.com:8082/20134

Author: ssahani

SPECS/systemd/systemd-issue-26494.patch

@@ -0,0 +1,30 @@
+From 6b25470ee28843a49c50442e9d8a98edc842ceca Mon Sep 17 00:00:00 2001
+From: Yu Watanabe <watanabe.yu+github@gmail.com>
+Date: Mon, 20 Feb 2023 12:00:30 +0900
+Subject: [PATCH] core/manager: run generators directly when we are in initrd
+
+Some initrd system write files at ourside of /run, /etc, or other
+allowed places. This is a kind of workaround, but in most cases, such
+sandboxing is not necessary as the filesystem is on ramfs when we are in
+initrd.
+
+Fixes #26488.
+---
+ src/core/manager.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/core/manager.c b/src/core/manager.c
+index 7b394794b0d4..306477c6e6c2 100644
+--- a/src/core/manager.c
++++ b/src/core/manager.c
+@@ -3822,8 +3822,8 @@ static int manager_run_generators(Manager *m) {
+         /* If we are the system manager, we fork and invoke the generators in a sanitized mount namespace. If
+          * we are the user manager, let's just execute the generators directly. We might not have the
+          * necessary privileges, and the system manager has already mounted /tmp/ and everything else for us.
+-         */
+-        if (MANAGER_IS_USER(m)) {
++         * If we are in initrd, let's also execute the generators directly, as we are in ramfs. */
++        if (MANAGER_IS_USER(m) || in_initrd()) {
+                 r = manager_execute_generators(m, paths, /* remount_ro= */ false);
+                 goto finish;
+         }

SPECS/systemd/systemd.spec

@@ -3,7 +3,7 @@
 Name:           systemd
 URL:            http://www.freedesktop.org/wiki/Software/systemd
 Version:        253
-Release:        1%{?dist}
+Release:        2%{?dist}
 License:        LGPLv2+ and GPLv2+ and MIT
 Summary:        System and Service Manager
 Group:          System Environment/Security
@@ -17,7 +17,9 @@ Source1:        99-vmware-hotplug.rules
 Source2:        50-security-hardening.conf
 Source3:        %{name}.cfg
 Source4:        99-dhcp-en.network
+%ifarch x86_64
 Source5:        10-rdrand-rng.conf
+%endif
 Source6:        10-defaults.preset
 
 Source11:       macros.sysusers
@@ -28,6 +30,7 @@ Source14:       sysusers.generate-pre.sh
 Patch0: enoX-uses-instance-number-for-vmware-hv.patch
 Patch1: fetch-dns-servers-from-environment.patch
 Patch2: use-bfq-scheduler.patch
+Patch3: systemd-issue-26494.patch
 
 Requires:       Linux-PAM
 Requires:       bzip2
@@ -705,6 +708,8 @@ fi
 %files lang -f ../%{name}.lang
 
 %changelog
+* Wed Mar 29 2023 Susant Sahani <ssahani@vmware.com> 253-2
+- https://github.com/systemd/systemd/pull/26494.patch.
 * Thu Feb 16 2023 Susant Sahani <ssahani@vmware.com> 253-1
 - Version bump.
 * Tue Feb 07 2023 Shreenidhi Shedi <sshedi@vmware.com> 252.4-9