* Copyright (c) 1989 The Regents of the University of California.
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
* @(#)mount.h 7.9 (Berkeley) %G%
typedef quad fsid_t
; /* file system id type */
* These are unique per filesystem on a single machine.
u_short fid_len
; /* length of data in bytes */
u_short fid_reserved
; /* force longword alignment */
char fid_data
[MAXFIDSZ
]; /* data (variable length) */
* Structure per mounted file system.
* Each mounted file system has an array of
* operations and an instance record.
* The file systems are put on a doubly linked list.
struct mount
*m_next
; /* next in mount list */
struct mount
*m_prev
; /* prev in mount list */
struct vfsops
*m_op
; /* operations on fs */
struct vnode
*m_vnodecovered
; /* vnode we mounted on */
struct vnode
*m_mounth
; /* list of vnodes this mount */
long m_fsize
; /* fundamental block size */
long m_bsize
; /* optimal transfer size */
fsid_t m_fsid
; /* identifier */
uid_t m_exroot
; /* exported mapping for uid 0 */
qaddr_t m_data
; /* private data */
#define M_RDONLY 0x01 /* read only filesystem */
#define M_SYNCHRONOUS 0x02 /* file system written synchronously */
#define M_NOEXEC 0x04 /* can't exec from filesystem */
#define M_NOSUID 0x08 /* don't honor setuid bits on fs */
#define M_NODEV 0x10 /* don't interpret special files */
#define M_EXPORTED 0x100 /* file system is exported */
#define M_EXRDONLY 0x200 /* exported read only */
* filesystem control flags.
* M_MLOCK lock the mount entry so that name lookup cannot proceed
* past the mount point. This keeps the subtree stable during mounts
#define M_MLOCK 0x1000 /* lock so that subtree is stable */
#define M_MWAIT 0x2000 /* someone is waiting for lock */
#define M_UPDATE 0x4000 /* not a real mount, just an update */
* Operations supported on mounted file system.
int (*vfs_mount
)( /* mp, path, data, ndp */ );
int (*vfs_start
)( /* mp, flags */ );
int (*vfs_unmount
)( /* mp, forcibly */ );
int (*vfs_root
)( /* mp, vpp */ );
int (*vfs_statfs
)( /* mp, sbp */ );
int (*vfs_sync
)( /* mp, waitfor */ );
int (*vfs_fhtovp
)( /* mp, fidp, vpp */ );
int (*vfs_vptofh
)( /* vp, fidp */ );
int (*vfs_init
)( /* */ );
#define VFS_MOUNT(MP, PATH, DATA, NDP) \
(*(MP)->m_op->vfs_mount)(MP, PATH, DATA, NDP)
#define VFS_START(MP, FLAGS) (*(MP)->m_op->vfs_start)(MP, FLAGS)
#define VFS_UNMOUNT(MP, FORCIBLY) (*(MP)->m_op->vfs_unmount)(MP, FORCIBLY)
#define VFS_ROOT(MP, VPP) (*(MP)->m_op->vfs_root)(MP, VPP)
#define VFS_STATFS(MP, SBP) (*(MP)->m_op->vfs_statfs)(MP, SBP)
#define VFS_SYNC(MP, WAITFOR) (*(MP)->m_op->vfs_sync)(MP, WAITFOR)
#define VFS_FHTOVP(MP, FIDP, VPP) (*(MP)->m_op->vfs_fhtovp)(MP, FIDP, VPP)
#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->m_op->vfs_vptofh)(VP, FIDP)
* forcibly flags for vfs_umount().
* waitfor flags to vfs_sync()
#define MNAMELEN 90 /* length of buffer for returned name */
short f_type
; /* type of filesystem (see below) */
short f_flags
; /* copy of mount flags */
long f_fsize
; /* fundamental file system block size */
long f_bsize
; /* optimal transfer 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_spare
[9]; /* spare for later */
char f_mntonname
[MNAMELEN
]; /* directory on which mounted */
char f_mntfromname
[MNAMELEN
];/* mounted filesystem */
fsid_t fh_fsid
; /* File system id of mount point */
struct fid fh_fid
; /* Id of file */
typedef struct fhandle fhandle_t
;
char *fspec
; /* block special device to mount */
int exflags
; /* export related flags */
uid_t exroot
; /* mapping for root uid */
char *name
; /* name to export for statfs */
caddr_t base
; /* base address of file system in memory */
u_long size
; /* size of file system */
* File Handle (32 bytes for version 2), variable up to 1024 for version 3
typedef union nfsv2fh nfsv2fh_t
;
struct sockaddr_in
*addr
; /* file server address */
nfsv2fh_t
*fh
; /* File handle to be mounted */
int wsize
; /* write size in bytes */
int rsize
; /* read size in bytes */
int timeo
; /* initial timeout in .1 secs */
int retrans
; /* times to retry send */
char *hostname
; /* server's name */
#define NFSMNT_SOFT 0x001 /* soft mount (hard is default) */
#define NFSMNT_WSIZE 0x002 /* set write size */
#define NFSMNT_RSIZE 0x004 /* set read size */
#define NFSMNT_TIMEO 0x008 /* set initial timeout */
#define NFSMNT_RETRANS 0x010 /* set number of request retrys */
#define NFSMNT_HOSTNAME 0x020 /* set hostname for error printf */
#define NFSMNT_INT 0x040 /* allow interrupts on hard mount */
* exported vnode operations
extern void vfs_remove(); /* remove a vfs from mounted vfs list */
extern int vfs_lock(); /* lock a vfs */
extern void vfs_unlock(); /* unlock a vfs */
extern struct mount
*getvfs(); /* return vfs given fsid */
extern struct mount
*rootfs
; /* ptr to root mount structure */
extern struct vfsops
*vfssw
[]; /* mount filesystem type switch table */