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BSD 4_4_Lite1 release
[unix-history] / usr / src / sys / sys / mount.h
/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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 8.13 (Berkeley) 3/27/94
*/
#ifndef KERNEL
#include <sys/ucred.h>
#endif
#include <sys/queue.h>
typedef struct { long val[2]; } fsid_t; /* file system 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) */
};
/*
* file system statistics
*/
#define MNAMELEN 90 /* length of buffer for returned name */
struct statfs {
short f_type; /* type of filesystem (see below) */
short f_flags; /* copy of mount flags */
long f_bsize; /* fundamental file system block size */
long f_iosize; /* 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 */
};
/*
* File system types.
*/
#define MOUNT_NONE 0
#define MOUNT_UFS 1 /* Fast Filesystem */
#define MOUNT_NFS 2 /* Sun-compatible Network Filesystem */
#define MOUNT_MFS 3 /* Memory-based Filesystem */
#define MOUNT_MSDOS 4 /* MS/DOS Filesystem */
#define MOUNT_LFS 5 /* Log-based Filesystem */
#define MOUNT_LOFS 6 /* Loopback Filesystem */
#define MOUNT_FDESC 7 /* File Descriptor Filesystem */
#define MOUNT_PORTAL 8 /* Portal Filesystem */
#define MOUNT_NULL 9 /* Minimal Filesystem Layer */
#define MOUNT_UMAP 10 /* User/Group Identifer Remapping Filesystem */
#define MOUNT_KERNFS 11 /* Kernel Information Filesystem */
#define MOUNT_PROCFS 12 /* /proc Filesystem */
#define MOUNT_AFS 13 /* Andrew Filesystem */
#define MOUNT_CD9660 14 /* ISO9660 (aka CDROM) Filesystem */
#define MOUNT_UNION 15 /* Union (translucent) Filesystem */
#define MOUNT_MAXTYPE 15
#define INITMOUNTNAMES { \
"none", /* 0 MOUNT_NONE */ \
"ufs", /* 1 MOUNT_UFS */ \
"nfs", /* 2 MOUNT_NFS */ \
"mfs", /* 3 MOUNT_MFS */ \
"msdos", /* 4 MOUNT_MSDOS */ \
"lfs", /* 5 MOUNT_LFS */ \
"lofs", /* 6 MOUNT_LOFS */ \
"fdesc", /* 7 MOUNT_FDESC */ \
"portal", /* 8 MOUNT_PORTAL */ \
"null", /* 9 MOUNT_NULL */ \
"umap", /* 10 MOUNT_UMAP */ \
"kernfs", /* 11 MOUNT_KERNFS */ \
"procfs", /* 12 MOUNT_PROCFS */ \
"afs", /* 13 MOUNT_AFS */ \
"iso9660fs", /* 14 MOUNT_CD9660 */ \
"union", /* 15 MOUNT_UNION */ \
0, /* 16 MOUNT_SPARE */ \
}
/*
* 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.
*/
LIST_HEAD(vnodelst, vnode);
struct mount {
TAILQ_ENTRY(mount) mnt_list; /* mount list */
struct vfsops *mnt_op; /* operations on fs */
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 */
qaddr_t mnt_data; /* private data */
};
/*
* 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 */
#define MNT_USER 0x00008000 /* mounted by a user */
/*
* Mask of flags that are visible to statfs()
*/
#define MNT_VISFLAGMASK 0x0000ffff
/*
* 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 */
/*
* Operations supported on mounted file system.
*/
#ifdef KERNEL
#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; /* File system id of mount point */
struct fid fh_fid; /* File sys 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 */
};
/*
* Arguments to mount UFS-based filesystems
*/
struct ufs_args {
char *fspec; /* block special device to mount */
struct export_args export; /* network export information */
};
#ifdef MFS
/*
* Arguments to mount MFS
*/
struct mfs_args {
char *fspec; /* name to export for statfs */
struct export_args export; /* if exported MFSes are supported */
caddr_t base; /* base of file system in memory */
u_long size; /* size of file system */
};
#endif /* MFS */
#ifdef CD9660
/*
* Arguments to mount ISO 9660 filesystems.
*/
struct iso_args {
char *fspec; /* block special device to mount */
struct export_args export; /* network export info */
int flags; /* mounting flags, see below */
};
#define ISOFSMNT_NORRIP 0x00000001 /* disable Rock Ridge Ext.*/
#define ISOFSMNT_GENS 0x00000002 /* enable generation numbers */
#define ISOFSMNT_EXTATT 0x00000004 /* enable extended attributes */
#endif /* CD9660 */
#ifdef NFS
/*
* File Handle (32 bytes for version 2), variable up to 1024 for version 3
*/
union nfsv2fh {
fhandle_t fh_generic;
u_char fh_bytes[32];
};
typedef union nfsv2fh nfsv2fh_t;
/*
* Arguments to mount NFS
*/
struct nfs_args {
struct sockaddr *addr; /* file server address */
int addrlen; /* length of address */
int sotype; /* Socket type */
int proto; /* and Protocol */
nfsv2fh_t *fh; /* File handle to be mounted */
int flags; /* flags */
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 */
int maxgrouplist; /* Max. size of group list */
int readahead; /* # of blocks to readahead */
int leaseterm; /* Term (sec) of lease */
int deadthresh; /* Retrans threshold */
char *hostname; /* server's name */
};
/*
* NFS mount option flags
*/
#define NFSMNT_SOFT 0x00000001 /* soft mount (hard is default) */
#define NFSMNT_WSIZE 0x00000002 /* set write size */
#define NFSMNT_RSIZE 0x00000004 /* set read size */
#define NFSMNT_TIMEO 0x00000008 /* set initial timeout */
#define NFSMNT_RETRANS 0x00000010 /* set number of request retrys */
#define NFSMNT_MAXGRPS 0x00000020 /* set maximum grouplist size */
#define NFSMNT_INT 0x00000040 /* allow interrupts on hard mount */
#define NFSMNT_NOCONN 0x00000080 /* Don't Connect the socket */
#define NFSMNT_NQNFS 0x00000100 /* Use Nqnfs protocol */
#define NFSMNT_MYWRITE 0x00000200 /* Assume writes were mine */
#define NFSMNT_KERB 0x00000400 /* Use Kerberos authentication */
#define NFSMNT_DUMBTIMR 0x00000800 /* Don't estimate rtt dynamically */
#define NFSMNT_RDIRALOOK 0x00001000 /* Do lookup with readdir (nqnfs) */
#define NFSMNT_LEASETERM 0x00002000 /* set lease term (nqnfs) */
#define NFSMNT_READAHEAD 0x00004000 /* set read ahead */
#define NFSMNT_DEADTHRESH 0x00008000 /* set dead server retry thresh */
#define NFSMNT_NQLOOKLEASE 0x00010000 /* Get lease for lookup */
#define NFSMNT_RESVPORT 0x00020000 /* Allocate a reserved port */
#define NFSMNT_INTERNAL 0xffe00000 /* Bits set internally */
#define NFSMNT_MNTD 0x00200000 /* Mnt server for mnt point */
#define NFSMNT_DISMINPROG 0x00400000 /* Dismount in progress */
#define NFSMNT_DISMNT 0x00800000 /* Dismounted */
#define NFSMNT_SNDLOCK 0x01000000 /* Send socket lock */
#define NFSMNT_WANTSND 0x02000000 /* Want above */
#define NFSMNT_RCVLOCK 0x04000000 /* Rcv socket lock */
#define NFSMNT_WANTRCV 0x08000000 /* Want above */
#define NFSMNT_WAITAUTH 0x10000000 /* Wait for authentication */
#define NFSMNT_HASAUTH 0x20000000 /* Has authenticator */
#define NFSMNT_WANTAUTH 0x40000000 /* Wants an authenticator */
#define NFSMNT_AUTHERR 0x80000000 /* Authentication error */
#endif /* NFS */
#ifdef KERNEL
/*
* exported vnode operations
*/
struct mount *getvfs __P((fsid_t *)); /* return vfs given fsid */
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 */
void vfs_unlock __P((struct mount *)); /* unlock a vfs */
extern TAILQ_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));
__END_DECLS
#endif /* KERNEL */
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.