initramfs: fixes for (debian) initramfs

* contrib/initramfs: include /etc/default/zfs and /etc/zfs/zfs-functions
At least debian needs /etc/default/zfs and /etc/zfs/zfs-functions for
its initramfs. Include both in build when initramfs is configured.

* contrib/initramfs: include 60-zvol.rules and zvol_id
Include 60-zvol.rules and zvol_id and set udev as predependency instead
of debians zdev. This makes debians additional zdev hook unneeded.

* Correct initconfdir substitution for some distros
Not every Linux distro is using @sysconfdir@/default but @initconfdir@
which is already determined by configure. Let's use it.

* systemd: prevent possible conflict between systemd and sysvinit
Systemd will not load a sysvinit service if a unit exists with the same
name. This prevents conflicts between sysvinit and systemd.
In ZFS there is one sysvinit service that does not have a systemd
service but a target counterpart, zfs-import.target.
Usually it does not make any sense to install both but it is possisble.
Let's prevent any conflict by masking zfs-import.service by default.
This does not harm even if init.d/zfs-import does not exist.

Reviewed-by: Chris Wedgwood <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Tested-by: Alex Ingram <[email protected]>
Tested-by: Dreamcat4 <[email protected]>
Signed-off-by: Michael Niewöhner <[email protected]>
Closes #7904 
Closes #9089 

1 files changed, 11 insertions, 2 deletions

diff --git a/rpm/generic/zfs.spec.in b/rpm/generic/zfs.spec.in
index a74d066bb..e4aef6725 100644
--- a/rpm/generic/zfs.spec.in
+++ b/rpm/generic/zfs.spec.in
@@ -433,6 +433,14 @@ systemctl --system daemon-reload >/dev/null || true
 %{_udevdir}/vdev_id
 %{_udevdir}/zvol_id
 %{_udevdir}/rules.d/*
+%if ! 0%{?_systemd} || 0%{?_initramfs}
+# Files needed for sysvinit and initramfs-tools
+%{_sysconfdir}/%{name}/zfs-functions
+%config(noreplace) %{_initconfdir}/zfs
+%else
+%exclude %{_sysconfdir}/%{name}/zfs-functions
+%exclude %{_initconfdir}/zfs
+%endif
 %if 0%{?_systemd}
 %{_unitdir}/*
 %{_presetdir}/*
@@ -440,9 +448,10 @@ systemctl --system daemon-reload >/dev/null || true
 %{_systemdgeneratordir}/*
 %else
 %config(noreplace) %{_sysconfdir}/init.d/*
-%config(noreplace) %{_initconfdir}/zfs
 %endif
-%config(noreplace) %{_sysconfdir}/%{name}
+%config(noreplace) %{_sysconfdir}/%{name}/zed.d/*
+%config(noreplace) %{_sysconfdir}/%{name}/zpool.d/*
+%config(noreplace) %{_sysconfdir}/%{name}/vdev_id.conf.*.example
 %attr(440, root, root) %config(noreplace) %{_sysconfdir}/sudoers.d/*
 
 %files -n libzpool2