/*
* 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.
* 4. 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
* $FreeBSD: src/sys/sys/mount.h,v 1.195 2005/03/24 07:29:23 jeff Exp $
*/
/*
* $Id$
*/
#ifndef _SYS_MOUNT_H_
#define _SYS_MOUNT_H_
#ifndef _KERNEL
#include <sys/ucred.h>
#endif
#include <sys/queue.h>
typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */
/*
* File identifier.
* These are unique per filesystem on a single machine.
*/
#define MAXFIDSZ 16
struct fid {
u_short fid_len; /* length of data in bytes */
u_short fid_reserved; /* force longword alignment */
char fid_data[MAXFIDSZ]; /* data (variable length) */
};
/*
* filesystem statistics
*/
#define MNAMELEN 90 /* length of buffer for returned name */
struct statfs {
long f_spare2; /* placeholder */
long f_bsize; /* fundamental filesystem block size */
long f_iosize; /* optimal transfer block size */
long f_blocks; /* total data blocks in filesystem */
long f_bfree; /* free blocks in fs */
long f_bavail; /* free blocks avail to non-superuser */
long f_files; /* total file nodes in filesystem */
long f_ffree; /* free file nodes in fs */
fsid_t f_fsid; /* filesystem id */
uid_t f_owner; /* user that mounted the filesystem */
int f_type; /* type of filesystem (see below) */
int f_flags; /* copy of mount flags */
long f_spare[6]; /* spare for later */
char f_mntonname[MNAMELEN]; /* directory on which mounted */
char f_mntfromname[MNAMELEN];/* mounted filesystem */
};
/*
* Structure per mounted filesystem. Each mounted filesystem has an
* array of operations and an instance record. The filesystems are
* put on a doubly linked list.
*
*/
LIST_HEAD(vnodelst, vnode);
struct mount {
CIRCLEQ_ENTRY(mount) mnt_list; /* mount list */
struct vfsops *mnt_op; /* operations on fs */
struct vfsconf *mnt_vfc; /* configuration info */
struct vnode *mnt_vnodecovered; /* vnode we mounted on */
struct vnodelst mnt_vnodelist; /* list of vnodes this mount */
int mnt_flag; /* flags */
int mnt_maxsymlinklen; /* max size of short symlink */
struct statfs mnt_stat; /* cache of filesystem stats */
void * mnt_data; /* private data */
time_t mnt_time; /* last time written*/
};
/*
* Mount flags.
*
* Unmount uses MNT_FORCE flag.
*/
#define MNT_RDONLY 0x00000001 /* read only filesystem */
#define MNT_SYNCHRONOUS 0x00000002 /* filesystem 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 /* filesystem written asynchronously */
#define MNT_NOATIME 0x10000000 /* Disable update of file access times */
/*
* exported mount flags.
*/
#define MNT_EXRDONLY 0x00000080 /* exported read only */
#define MNT_EXPORTED 0x00000100 /* filesystem 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 */
#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */
/*
* 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 */
#define MNT_USER 0x00008000 /* mounted by a user */
#define MNT_IGNORE 0x00800000 /* do not show entry in df */
/*
* Mask of flags that are visible to statfs()
*/
#define MNT_VISFLAGMASK (MNT_RDONLY|MNT_SYNCHRONOUS|MNT_NOEXEC|MNT_NOSUID| \
MNT_NODEV|MNT_UNION|MNT_ASYNC|MNT_EXRDONLY|MNT_EXPORTED| \
MNT_DEFEXPORTED|MNT_EXPORTANON|MNT_EXKERB|MNT_LOCAL| \
MNT_QUOTA|MNT_ROOTFS|MNT_USER|MNT_NOATIME)
/*
* filesystem control flags.
*
* MNT_MLOCK lock the mount entry so that name lookup cannot proceed
* past the mount point. This keeps the subtree stable during mounts
* and unmounts.
*/
#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 */
#define MNT_MLOCK 0x00100000 /* lock so that subtree is stable */
#define MNT_MWAIT 0x00200000 /* someone is waiting for lock */
#define MNT_MPBUSY 0x00400000 /* scan of mount point in progress */
#define MNT_MPWANT 0x00800000 /* waiting for mount point */
#define MNT_UNMOUNT 0x01000000 /* unmount in progress */
#define MNT_WANTRDWR 0x02000000 /* want upgrade to read/write */
/*
* used to get configured filesystems information
*/
#define VFS_MAXNAMELEN 32
struct vfsconf {
void *vfc_vfsops;
char vfc_name[VFS_MAXNAMELEN];
int vfc_index;
int vfc_refcount;
int vfc_flags;
};
/*
* Operations supported on mounted filesystem.
*/
#ifdef _KERNEL
extern int doforce; /* Flag to permit forcible unmounting. */
extern struct vfsconf void_vfsconf;
extern struct vfsconf *vfsconf[];
#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 mbuf *nam, struct vnode **vpp,
int *exflagsp, struct ucred **credanonp));
int (*vfs_vptofh) __P((struct vnode *vp, struct fid *fhp));
int (*vfs_init) __P((void));
};
#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)
#endif /* _KERNEL */
/*
* Flags for various system call interfaces.
*
* waitfor flags to vfs_sync() and getfsstat()
*/
#define MNT_WAIT 1
#define MNT_NOWAIT 2
/*
* Generic file handle
*/
struct fhandle {
fsid_t fh_fsid; /* Filesystem id of mount point */
struct fid fh_fid; /* Filesys specific id */
};
typedef struct fhandle fhandle_t;
#ifdef _KERNEL
#include <net/radix.h>
#include <sys/socket.h> /* XXX for AF_MAX */
/*
* 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 */
};
#endif /* _KERNEL */
/*
* Export arguments for local filesystem mount calls.
*/
struct export_args {
int ex_flags; /* export related flags */
uid_t ex_root; /* mapping for root uid */
struct ucred ex_anon; /* mapping for anonymous user */
struct sockaddr *ex_addr; /* net address to which exported */
int ex_addrlen; /* and the net address length */
struct sockaddr *ex_mask; /* mask of valid bits in saddr */
int ex_masklen; /* and the smask length */
};
#ifdef _KERNEL
extern int (*mountroot) __P((void *));
extern struct vfsops *mountrootvfsops;
/*
* exported vnode operations
*/
int dounmount __P((struct mount *, int, struct proc *));
struct mount *getvfs __P((fsid_t *)); /* return vfs given fsid */
void getnewfsid __P((struct mount *, int));
int vflush __P((struct mount *, struct vnode *, int));
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 mbuf *));
int vfs_lock __P((struct mount *)); /* lock a vfs */
int vfs_mountedon __P((struct vnode *)); /* is a vfs mounted on vp */
int vfs_mountroot __P((void *)); /* XXX goes away? */
void vfs_msync __P((struct mount *, int));
void vfs_unlock __P((struct mount *)); /* unlock a vfs */
void vfs_unmountall __P((void));
int vfs_busy __P((struct mount *)); /* mark a vfs busy */
void vfs_unbusy __P((struct mount *)); /* mark a vfs not busy */
extern CIRCLEQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */
extern struct vfsops *vfssw[]; /* filesystem type table */
#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((int, const char *, int, void *));
int statfs __P((const char *, struct statfs *));
int unmount __P((const char *, int));
/* C library stuff */
struct vfsconf *getvfsbyname __P((const char *));
struct vfsconf *getvfsbytype __P((int));
struct vfsconf *getvfsent __P((void));
void setvfsent __P((int));
void endvfsent __P((void));
int vfsisloadable __P((const char *));
int vfsload __P((const char *));
__END_DECLS
#endif /* _KERNEL */
#endif /* !_SYS_MOUNT_H_ */
