freebsd-dev/config/user-systemd.m4
Antonio Russo 55d80e651a systemd mount generator and tracking ZEDLET
zfs-mount-generator implements the "systemd generator" protocol,
producing systemd.mount units from the cached outputs of zfs list,
during early boot, integrating with systemd.

Each pool has an indpendent cache of the command

  zfs list -H -oname,mountpoint,canmount -tfilesystem -r $pool

which is kept synchronized by the ZEDLET

  history_event-zfs-list-cacher.sh

Datasets not in the cache will be loaded later in the boot process by
zfs-mount.service, including pools without a cache.

Among other things, this allows for complex mount hierarchies.

Reviewed-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Antonio Russo <antonio.e.russo@gmail.com>
Closes #7329
2018-04-06 14:11:09 -07:00

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AC_DEFUN([ZFS_AC_CONFIG_USER_SYSTEMD], [
AC_ARG_ENABLE(systemd,
AC_HELP_STRING([--enable-systemd],
[install systemd unit/preset files [[default: yes]]]),
[enable_systemd=$enableval],
[enable_systemd=check])
AC_ARG_WITH(systemdunitdir,
AC_HELP_STRING([--with-systemdunitdir=DIR],
[install systemd unit files in dir [[/usr/lib/systemd/system]]]),
systemdunitdir=$withval,systemdunitdir=/usr/lib/systemd/system)
AC_ARG_WITH(systemdpresetdir,
AC_HELP_STRING([--with-systemdpresetdir=DIR],
[install systemd preset files in dir [[/usr/lib/systemd/system-preset]]]),
systemdpresetdir=$withval,systemdpresetdir=/usr/lib/systemd/system-preset)
AC_ARG_WITH(systemdmodulesloaddir,
AC_HELP_STRING([--with-systemdmodulesloaddir=DIR],
[install systemd module load files into dir [[/usr/lib/modules-load.d]]]),
systemdmoduleloaddir=$withval,systemdmodulesloaddir=/usr/lib/modules-load.d)
AC_ARG_WITH(systemdgeneratordir,
AC_HELP_STRING([--with-systemdgeneratordir=DIR],
[install systemd generators in dir [[/usr/lib/systemd/system-generators]]]),
systemdgeneratordir=$withval,systemdgeneratordir=/usr/lib/systemd/system-generators)
AS_IF([test "x$enable_systemd" = xcheck], [
AS_IF([systemctl --version >/dev/null 2>&1],
[enable_systemd=yes],
[enable_systemd=no])
])
AC_MSG_CHECKING(for systemd support)
AC_MSG_RESULT([$enable_systemd])
AS_IF([test "x$enable_systemd" = xyes], [
ZFS_INIT_SYSTEMD=systemd
ZFS_MODULE_LOAD=modules-load.d
DEFINE_SYSTEMD='--with systemd --define "_unitdir $(systemdunitdir)" --define "_presetdir $(systemdpresetdir)" --define "_generatordir $(systemdgeneratordir)"'
modulesloaddir=$systemdmodulesloaddir
],[
DEFINE_SYSTEMD='--without systemd'
])
AC_SUBST(ZFS_INIT_SYSTEMD)
AC_SUBST(ZFS_MODULE_LOAD)
AC_SUBST(DEFINE_SYSTEMD)
AC_SUBST(systemdunitdir)
AC_SUBST(systemdpresetdir)
AC_SUBST(systemdgeneratordir)
AC_SUBST(modulesloaddir)
])