This mount helper should only be invoked via the mount (8) command,
e.g. mount -t lustre dev dir

usage: mount.lustre [-fhnvV] [-o <srvopt>] <device> <mountpt>
usage: mount.lustre [-fhnvV] [-o <cliopt>] <mgstarget> <mountpt>
	<device>: the local disk device when mounting a server
	<mgstarget>: the server MGS and filesystem for a client:
		<mgsnid>[:<altmgsnid>...]:/<filesystem>[/<subdir>]
			<mgsnid>: MGS LNet Node Identifier (e.g. mgs01@o2ib)
			<filesystem>: Lustre filesystem name (e.g. lustre1)
			<subdir>: subdirectory of the filesystem to mount
	<mountpt>: filesystem mountpoint (e.g. /mnt/lustre)
	-f|--fake: fake mount (only update /etc/mtab)
	-o force|--force: force mount even if already in /etc/mtab
	-h|--help: print this usage message
	-n|--nomtab: do not update /etc/mtab after mount
	-v|--verbose: print verbose config settings
	-V|--version: output build version of the utility and exit
	default options are marked below with '*'
		(no)flock: disable* or enable POSIX flock support
		(no)user_xattr: disable or enable* user xattr namespace
	<srvopt>: one or more comma separated server options:
		(no)acl: disable or enable* POSIX ACL support completely
		abort_recov: abort server recovery handling
		nosvc: only start MGC/MGS without starting MDS/OSS
		nomgs: only start target MDS/OSS, using existing MGS
		noclient: do NOT allow clients connections other than MGS local
		noscrub: do NOT auto start OI scrub unless requested
		skip_lfsck: do NOT auto resume paused/crashed LFSCK
		md_stripe_cache_size=<num>: set MD RAID device stripe cache size
	<cliopt>: one or more comma separated client options:
		exclude=<ostname>[:<ostname>]: list of inactive OSTs (e.g. lustre-OST0001)
		localflock: enable POSIX flock only on local client
	mgsname=HOSTNAME: MGS hostname for display in /proc/mounts
		retry=<num>: number of times mount is retried by client
		(no)user_fid2path: disable* or enable user $MOUNT/.lustre/fid access
		(no)checksum: disable or enable* data checksums
		(no)lruresize: disable or enable* LDLM dynamic LRU size
		(no)lazystatfs: disable or enable* statfs to work if OST is unavailable
		32bitapi: return only 32-bit inode numbers to userspace
		(no)verbose: disable or enable* messages at filesystem (un,re)mount