Add systemd unit files for ZFS startup

This adds systemd unit files replacing the functionality offered by
the SysV init script found in etc/init.d.

It has been developed and tested on Fedora 19, Fedora 20
and openSuSE 13.1.

Four unit files and one target are offered.

zfs-import-cache.service:
    Import pools from /etc/zfs/zpool.cache. This unit will wait for
    udev to settle.
zfs-import-scan.service:
    Import pools by scanning /dev/disk/by-id for zvols. This unit will
    only run if /etc/zfs/zpool.cache is not present. This unit will wait
    for udev to settle
zfs-mount.service:
    Mount ZFS native filesystems. It contains a dependency to be loaded
    before local-fs.target.
zfs-share.service:
    Share NFS/SMB filesystems. This unit contains a dependency that
    will cause it to be restarted whenever the smb or nfs-server unit
    is restarted, restoring the shares added.
zfs.target:
    This target pulls in the other units in order to start ZFS. It's
    the only unit that can be enabled/disabled, all other services
    are static and pulled in by dependencies. It will honour zfs=off
    and zfs=no options on the kernel command line.

Signed-off-by: Brian Behlendorf <[email protected]>
Closes #2108

1 files changed, 11 insertions, 0 deletions

diff --git a/config/user-sysvinit.m4 b/config/user-sysvinit.m4
new file mode 100644
index 000000000..65dcc3819
--- /dev/null
+++ b/config/user-sysvinit.m4
@@ -0,0 +1,11 @@
+AC_DEFUN([ZFS_AC_CONFIG_USER_SYSVINIT], [
+	AC_ARG_ENABLE(sysvinit,
+		AC_HELP_STRING([--enable-sysvinit],
+		[install SysV init scripts [default: yes]]),
+		[],enable_sysvinit=yes)
+
+	AS_IF([test "x$enable_sysvinit" = xyes],
+		[ZFS_INIT_SYSV=init.d])
+
+	AC_SUBST(ZFS_INIT_SYSV)
+])