/*-
* Copyright (c) 1989, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)mount.h 8.21 (Berkeley) 5/20/95
*/
#ifndef _SYS_MOUNT_H
#define _SYS_MOUNT_H
#include <sys/cdefs.h>
#include <sys/list.h>
#include <sys/vnode.h>
#include <sys/syslimits.h>
typedef struct { int32_t val[2]; } fsid_t; /* file system id type */
/*
* file system statistics
*/
struct statfs {
short f_type; /* filesystem type number */
short f_flags; /* copy of mount flags */
long f_bsize; /* fundamental file system block size */
long f_blocks; /* total data blocks in file system */
long f_bfree; /* free blocks in fs */
long f_bavail; /* free blocks avail to non-superuser */
long f_files; /* total file nodes in file system */
long f_ffree; /* free file nodes in fs */
fsid_t f_fsid; /* file system id */
long f_namelen; /* maximum filename length */
};
/*
* Mount data
*/
struct mount {
struct list m_link; /* link to next mount point */
struct vfsops *m_op; /* pointer to vfs operation */
int m_flags; /* mount flag */
int m_count; /* reference count */
char m_path[PATH_MAX]; /* mounted path */
dev_t m_dev; /* mounted device */
struct vnode *m_root; /* root vnode */
struct vnode *m_covered; /* vnode covered on parent fs */
void *m_data; /* private data for fs */
};
typedef struct mount *mount_t;
/*
* Mount flags.
*
* Unmount uses MNT_FORCE flag.
*/
#define MNT_RDONLY 0x00000001 /* read only filesystem */
#define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
#define MNT_NODEV 0x00000010 /* don't interpret special files */
#define MNT_UNION 0x00000020 /* union with underlying filesystem */
#define MNT_ASYNC 0x00000040 /* file system written asynchronously */
/*
* exported mount flags.
*/
#define MNT_EXRDONLY 0x00000080 /* exported read only */
#define MNT_EXPORTED 0x00000100 /* file system is exported */
#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
/*
* Flags set by internal operations.
*/
#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
/*
* Mask of flags that are visible to statfs()
*/
#define MNT_VISFLAGMASK 0x0000ffff
/*
* External filesystem control flags.
*/
#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
#define MNT_DELEXPORT 0x00020000 /* delete export host lists */
#define MNT_RELOAD 0x00040000 /* reload filesystem data */
#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
/*
* Internal filesystem control flags.
*
* MNT_UNMOUNT locks the mount entry so that name lookup cannot proceed
* past the mount point. This keeps the subtree stable during mounts
* and unmounts.
*/
#define MNT_UNMOUNT 0x01000000 /* unmount in progress */
#define MNT_MWAIT 0x02000000 /* waiting for unmount to finish */
#define MNT_WANTRDWR 0x04000000 /* upgrade to read/write requested */
/*
* Sysctl CTL_VFS definitions.
*
* Second level identifier specifies which filesystem. Second level
* identifier VFS_GENERIC returns information about all filesystems.
*/
#define VFS_GENERIC 0 /* generic filesystem information */
/*
* Third level identifiers for VFS_GENERIC are given below; third
* level identifiers for specific filesystems are given in their
* mount specific header files.
*/
#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
#define VFS_CONF 2 /* struct: vfsconf for filesystem given
as next argument */
/*
* Flags for various system call interfaces.
*
* waitfor flags to vfs_sync() and getfsstat()
*/
#define MNT_WAIT 1
#define MNT_NOWAIT 2
/*
* Filesystem type switch table.
*/
struct vfssw {
char *vs_name; /* name of file system */
int (*vs_init)(void); /* initialize routine */
struct vfsops *vs_op; /* pointer to vfs operation */
};
/*
* Operations supported on virtual file system.
*/
struct vfsops {
int (*vfs_mount) (mount_t mp, char *dev, int flags, void *data);
int (*vfs_unmount) (mount_t mp);
int (*vfs_sync) (mount_t mp);
int (*vfs_vget) (mount_t mp, vnode_t vp);
int (*vfs_statfs) (mount_t mp, struct statfs *sfp);
struct vnops *vfs_vnops;
};
typedef int (*vfsop_mount_t)(mount_t, char *, int, void *);
typedef int (*vfsop_umount_t)(mount_t);
typedef int (*vfsop_sync_t)(mount_t);
typedef int (*vfsop_vget_t)(mount_t, vnode_t);
typedef int (*vfsop_statfs_t)(mount_t, struct statfs *);
/*
* VFS interface
*/
#define VFS_MOUNT(MP, DEV, FL, DAT) ((MP)->m_op->vfs_mount)(MP, DEV, FL, DAT)
#define VFS_UNMOUNT(MP) ((MP)->m_op->vfs_unmount)(MP)
#define VFS_SYNC(MP) ((MP)->m_op->vfs_sync)(MP)
#define VFS_VGET(MP, VP) ((MP)->m_op->vfs_vget)(MP, VP)
#define VFS_STATFS(MP, SFP) ((MP)->m_op->vfs_statfs)(MP, SFP)
#define VFS_NULL ((void *)vfs_null)
__BEGIN_DECLS
int mount(const char *, const char *, const char *, int, void *);
int umount(const char *);
int vfs_nullop(void);
int vfs_einval(void);
__END_DECLS
#endif /* !_SYS_MOUNT_H */