sys/sys/mount.h

47  * NOTE: When changing statfs structure, mount structure, MNT_* flags or
48  * MNTK_* flags also update DDB show mount command in vfs_subr.c.
84 	uint64_t f_flags;		/* copy of mount exported flags */
92 	uint64_t f_syncwrites;		/* count of sync writes since mount */
93 	uint64_t f_asyncwrites;		/* count of async writes since mount */
94 	uint64_t f_syncreads;		/* count of sync reads since mount */
95 	uint64_t f_asyncreads;		/* count of async reads since mount */
113 	uint64_t f_flags;		/* copy of mount exported flags */
121 	uint64_t f_syncwrites;		/* count of sync writes since mount */
122 	uint64_t f_asyncwrites;		/* count of async writes since mount */
123 	uint64_t f_syncreads;		/* count of sync reads since mount */
124 	uint64_t f_asyncreads;		/* count of async reads since mount */
154 	int	f_flags;		/* copy of mount exported flags */
155 	long	f_syncwrites;		/* count of sync writes since mount */
156 	long	f_asyncwrites;		/* count of async writes since mount */
159 	long	f_syncreads;		/* count of sync reads since mount */
160 	long	f_asyncreads;		/* count of async reads since mount */
199  * filesystem.  This is expected to be stored in the upper FS' per-mount data.
202  *	i - lower mount interlock
206 	struct mount 	*mp;	/* (c) mount object for upper FS */
226 struct mount {
235 	struct mtx __aligned(CACHE_LINE_SIZE)	mnt_mtx; /* mount structure interlock */
236 	int		mnt_gen;		/* struct mount generation */
238 	TAILQ_ENTRY(mount) mnt_list;		/* (m) mount list */
244 	struct vfsoptlist *mnt_opt;		/* current mount options */
268 	STAILQ_ENTRY(mount) mnt_taskqueue_link;	/* (d) our place in deferred unmount list */
278 struct vnode *__mnt_vnode_next_all(struct vnode **mvp, struct mount *mp);
279 struct vnode *__mnt_vnode_first_all(struct vnode **mvp, struct mount *mp);
280 void          __mnt_vnode_markerfree_all(struct vnode **mvp, struct mount *mp);
298 struct vnode *__mnt_vnode_next_lazy(struct vnode **mvp, struct mount *mp,
300 struct vnode *__mnt_vnode_first_lazy(struct vnode **mvp, struct mount *mp,
302 void          __mnt_vnode_markerfree_lazy(struct vnode **mvp, struct mount *mp);
395  * NFS export related mount flags.
420  * but the 'mount' program may need changing to handle this.
448  *      but because MNT_ACLS and MNT_MULTILABEL are only used for mount(2),
452 #define	MNT_UPDATE	0x0000000000010000ULL /* not real mount, just update */
459 #define	MNT_NOCOVER	0x0000001000000000ULL /* Do not cover a mount point */
460 #define	MNT_EMPTYDIR	0x0000002000000000ULL /* Only mount on empty dir */
471  * MNTK_UNMOUNT locks the mount entry so that name lookup cannot
472  * proceed past the mount point.  This keeps the subtree stable during
522 MNT_SHARED_WRITES(struct mount *mp)
529 MNT_EXTENDED_SHARED(struct mount *mp)
548  * mount specific header files.
568 	fsid_t	fh_fsid;	/* Filesystem id of mount point */
605  * Export arguments for local filesystem mount calls.
629 	struct mount	*np_mount;	/* Mountpoint of exported fs */
636  * mount time to identify the requested filesystem.
648 	int	vfc_prison_flag;	/* prison allow.mount.* flag */
649 	struct	vfsoptdecl *vfc_opts;	/* mount options */
780  * N.B., vfs_cmount is the ancient vfsop invoked by the old mount(2) syscall.
789  * mount(2) entirely.
792 typedef int vfs_unmount_t(struct mount *mp, int mntflags);
793 typedef int vfs_root_t(struct mount *mp, int flags, struct vnode **vpp);
794 typedef	int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, void *arg,
796 typedef	int vfs_statfs_t(struct mount *mp, struct statfs *sbp);
797 typedef	int vfs_sync_t(struct mount *mp, int waitfor);
798 typedef	int vfs_vget_t(struct mount *mp, ino_t ino, int flags,
800 typedef	int vfs_fhtovp_t(struct mount *mp, struct fid *fhp,
802 typedef	int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
807 typedef	int vfs_extattrctl_t(struct mount *mp, int cmd,
810 typedef	int vfs_mount_t(struct mount *mp);
811 typedef int vfs_sysctl_t(struct mount *mp, fsctlop_t op,
813 typedef void vfs_susp_clean_t(struct mount *mp);
814 typedef void vfs_notify_lowervp_t(struct mount *mp, struct vnode *lowervp);
815 typedef void vfs_purge_t(struct mount *mp);
817 typedef int vfs_report_lockf_t(struct mount *mp, struct sbuf *sb);
991 int	dounmount(struct mount *, uint64_t, struct thread *);
1001 void	vfs_mount_destroy(struct mount *);
1024 	    (struct mount *, struct netexport *, struct export_args *);
1025 void	vfs_periodic(struct mount *, int);
1026 int	vfs_busy(struct mount *, int);
1027 void	vfs_exjail_clone(struct mount *, struct mount *);
1029 int	vfs_export			 /* process mount export info */
1030 	    (struct mount *, struct export_args *, bool);
1032 void	vfs_allocate_syncvnode(struct mount *);
1033 void	vfs_deallocate_syncvnode(struct mount *);
1036 void	vfs_getnewfsid(struct mount *);
1037 struct	mount *vfs_getvfs(fsid_t *);      /* return vfs given fsid */
1038 struct	mount *vfs_busyfs(fsid_t *);
1040 void	vfs_mount_error(struct mount *, const char *, ...);
1041 void	vfs_mountroot(void);			/* mount our root filesystem */
1042 void	vfs_mountedfrom(struct mount *, const char *from);
1044 struct mount *vfs_ref_from_vp(struct vnode *);
1045 void	vfs_ref(struct mount *);
1046 void	vfs_rel(struct mount *);
1047 struct mount *vfs_mount_alloc(struct vnode *, struct vfsconf *, const char *,
1049 int	vfs_suser(struct mount *, struct thread *);
1050 void	vfs_unbusy(struct mount *);
1052 struct mount *vfs_register_upper_from_vp(struct vnode *,
1053 	    struct mount *ump, struct mount_upper_node *);
1054 void	vfs_register_for_notification(struct mount *, struct mount *,
1056 void	vfs_unregister_for_notification(struct mount *,
1058 void	vfs_unregister_upper(struct mount *, struct mount_upper_node *);
1059 int	vfs_remount_ro(struct mount *mp);
1060 int	vfs_report_lockf(struct mount *mp, struct sbuf *sb);
1062 extern	TAILQ_HEAD(mntlist, mount) mountlist;	/* mounted filesystem list */
1070 struct vnode *mntfs_allocvp(struct mount *, struct vnode *);
1095 struct vnode *vfs_cache_root_clear(struct mount *);
1096 void	vfs_cache_root_set(struct mount *, struct vnode *);
1098 void	vfs_op_barrier_wait(struct mount *);
1099 void	vfs_op_enter(struct mount *);
1100 void	vfs_op_exit_locked(struct mount *);
1101 void	vfs_op_exit(struct mount *);
1104 void	vfs_assert_mount_counters(struct mount *);
1105 void	vfs_dump_mount_counters(struct mount *);
1112 int	vfs_mount_fetch_counter(struct mount *, enum mount_counter);
1202 int	mount(const char *, const char *, int, void *);