mount.h

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};

/*
 * Structure holding information for a publicly exported filesystem
 * (WebNFS). Currently the specs allow just for one such filesystem.
 */
struct nfs_public {
	int		np_valid;	/* Do we hold valid information */
	fhandle_t	np_handle;	/* Filehandle for pub fs (internal) */
	struct mount	*np_mount;	/* Mountpoint of exported fs */
	char		*np_index;	/* Index file */
};

/*
 * Filesystem configuration information. One of these exists for each
 * type of filesystem supported by the kernel. These are searched at
 * mount time to identify the requested filesystem.
 */
struct vfsconf {
	struct	vfsops *vfc_vfsops;	/* filesystem operations vector */
	char	vfc_name[MFSNAMELEN];	/* filesystem type name */
	int	vfc_typenum;		/* historic filesystem type number */
	int	vfc_refcount;		/* number mounted of this type */
	int	vfc_flags;		/* permanent flags */
	struct	vfsconf *vfc_next;	/* next in list */
};

struct ovfsconf {
	void	*vfc_vfsops;
	char	vfc_name[32];
	int	vfc_index;
	int	vfc_refcount;
	int	vfc_flags;
};

/*
 * NB: these flags refer to IMPLEMENTATION properties, not properties of
 * any actual mounts; i.e., it does not make sense to change the flags.
 */
#define	VFCF_STATIC	0x00010000	/* statically compiled into kernel */
#define	VFCF_NETWORK	0x00020000	/* may get data over the network */
#define	VFCF_READONLY	0x00040000	/* writes are not implemented */
#define VFCF_SYNTHETIC	0x00080000	/* data does not represent real files */
#define	VFCF_LOOPBACK	0x00100000	/* aliases some other mounted FS */
#define	VFCF_UNICODE	0x00200000	/* stores file names as Unicode*/

#ifdef KERNEL

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_MOUNT);
#endif
extern int maxvfsconf;		/* highest defined filesystem type */
extern int nfs_mount_type;	/* vfc_typenum for nfs, or -1 */
extern struct vfsconf *vfsconf;	/* head of list of filesystem types */

/*
 * Operations supported on mounted file system.
 */
#ifdef __STDC__
struct nameidata;
struct mbuf;
#endif

struct vfsops {
	int	(*vfs_mount)	__P((struct mount *mp, char *path, caddr_t data,
				    struct nameidata *ndp, struct proc *p));
	int	(*vfs_start)	__P((struct mount *mp, int flags,
				    struct proc *p));
	int	(*vfs_unmount)	__P((struct mount *mp, int mntflags,
				    struct proc *p));
	int	(*vfs_root)	__P((struct mount *mp, struct vnode **vpp));
	int	(*vfs_quotactl)	__P((struct mount *mp, int cmds, uid_t uid,
				    caddr_t arg, struct proc *p));
	int	(*vfs_statfs)	__P((struct mount *mp, struct statfs *sbp,
				    struct proc *p));
	int	(*vfs_sync)	__P((struct mount *mp, int waitfor,
				    struct ucred *cred, struct proc *p));
	int	(*vfs_vget)	__P((struct mount *mp, ino_t ino,
				    struct vnode **vpp));
	int	(*vfs_fhtovp)	__P((struct mount *mp, struct fid *fhp,
				    struct sockaddr *nam, struct vnode **vpp,
				    int *exflagsp, struct ucred **credanonp));
	int	(*vfs_vptofh)	__P((struct vnode *vp, struct fid *fhp));
	int	(*vfs_init)	__P((struct vfsconf *));
	int	(*vfs_uninit)	__P((struct vfsconf *));
	struct sysctl_oid *vfs_oid;
};

#define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
	(*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
#define VFS_START(MP, FLAGS, P)	  (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
#define VFS_ROOT(MP, VPP)	  (*(MP)->mnt_op->vfs_root)(MP, VPP)
#define VFS_QUOTACTL(MP,C,U,A,P)  (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
#define VFS_STATFS(MP, SBP, P)	  (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
#define VFS_SYNC(MP, WAIT, C, P)  (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P)
#define VFS_VGET(MP, INO, VPP)	  (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
#define VFS_FHTOVP(MP, FIDP, NAM, VPP, EXFLG, CRED) \
	(*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, NAM, VPP, EXFLG, CRED)
#define	VFS_VPTOFH(VP, FIDP)	  (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)

#if defined(VFS_LKM) && !defined(KLD_MODULE)
#include <sys/conf.h>
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/lkm.h>

#define VFS_SET(vfsops, fsname, flags) \
	static struct vfsconf _fs_vfsconf = { \
		&vfsops, \
		#fsname, \
		-1, \
		0, \
		flags, \
	}; \
	extern struct linker_set MODVNOPS; \
	MOD_VFS(fsname,&MODVNOPS,&_fs_vfsconf); \
	int \
	fsname ## _mod(struct lkm_table *lkmtp, int cmd, int ver); \
	int \
	fsname ## _mod(struct lkm_table *lkmtp, int cmd, int ver) { \
		MOD_DISPATCH(fsname, \
		lkmtp, cmd, ver, lkm_nullcmd, lkm_nullcmd, lkm_nullcmd); } \
	struct __hack

#else

#include <sys/module.h>

#define VFS_SET(vfsops, fsname, flags) \
	static struct vfsconf fsname ## _vfsconf = {		\
		&vfsops,					\
		#fsname,					\
		-1,						\
		0,						\
		flags						\
	};							\
	static moduledata_t fsname ## _mod = {			\
		#fsname,					\
		vfs_modevent,					\
		& fsname ## _vfsconf				\
	};							\
	DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)

#endif /* VFS_LKM */

#include <net/radix.h>

#define	AF_MAX		31	/* XXX */

/*
 * Network address lookup element
 */
struct netcred {
	struct	radix_node netc_rnodes[2];
	int	netc_exflags;
	struct	ucred netc_anon;
};

/*
 * Network export information
 */
struct netexport {
	struct	netcred ne_defexported;		      /* Default export */
	struct	radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
};

extern	char *mountrootfsname;

/*
 * exported vnode operations
 */
int	dounmount __P((struct mount *, int, struct proc *));
int	vfs_setpublicfs			    /* set publicly exported fs */
	  __P((struct mount *, struct netexport *, struct export_args *));
int	vfs_lock __P((struct mount *));         /* lock a vfs */
void	vfs_msync __P((struct mount *, int));
void	vfs_unlock __P((struct mount *));       /* unlock a vfs */
int	vfs_busy __P((struct mount *, int, struct simplelock *, struct proc *));
int	vfs_export			    /* process mount export info */
	  __P((struct mount *, struct netexport *, struct export_args *));
struct	netcred *vfs_export_lookup	    /* lookup host in fs export list */
	  __P((struct mount *, struct netexport *, struct sockaddr *));
int	vfs_allocate_syncvnode __P((struct mount *));
void	vfs_getnewfsid __P((struct mount *));
struct	mount *vfs_getvfs __P((fsid_t *));      /* return vfs given fsid */
int	vfs_modevent __P((module_t, int, void *));
int	vfs_mountedon __P((struct vnode *));    /* is a vfs mounted on vp */
int	vfs_rootmountalloc __P((char *, char *, struct mount **));
void	vfs_unbusy __P((struct mount *, struct proc *));
void	vfs_unmountall __P((void));
int	vfs_register __P((struct vfsconf *));
int	vfs_unregister __P((struct vfsconf *));
extern	CIRCLEQ_HEAD(mntlist, mount) mountlist;	/* mounted filesystem list */
extern	struct simplelock mountlist_slock;
extern	struct nfs_public nfs_pub;

#else /* !KERNEL */

#include <sys/cdefs.h>

__BEGIN_DECLS
int	fstatfs __P((int, struct statfs *));
int	getfh __P((const char *, fhandle_t *));
int	getfsstat __P((struct statfs *, long, int));
int	getmntinfo __P((struct statfs **, int));
int	mount __P((const char *, const char *, int, void *));
int	statfs __P((const char *, struct statfs *));
int	unmount __P((const char *, int));

/* C library stuff */
void	endvfsent __P((void));
struct	ovfsconf *getvfsbyname __P((const char *));
struct	ovfsconf *getvfsbytype __P((int));
struct	ovfsconf *getvfsent __P((void));
#define	getvfsbyname	new_getvfsbyname
int	new_getvfsbyname __P((const char *, struct vfsconf *));
void	setvfsent __P((int));
int	vfsisloadable __P((const char *));
int	vfsload __P((const char *));
__END_DECLS

#endif /* KERNEL */

#endif /* !_SYS_MOUNT_H_ */