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NetBSD/sys/sys/mount.h

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/* $NetBSD: mount.h,v 1.89 2001/01/24 20:34:59 kleink Exp $ */
/*
* 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 8.21 (Berkeley) 5/20/95
*/
#ifndef _SYS_MOUNT_H_
#define _SYS_MOUNT_H_
#ifndef _KERNEL
#include <sys/ucred.h>
#if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
#include <sys/stat.h>
#endif /* !_POSIX_C_SOURCE */
#endif
#include <sys/queue.h>
#include <sys/lock.h>
typedef struct { int32_t 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 MFSNAMELEN 16 /* length of fs type name, including nul */
#define MNAMELEN 90 /* length of buffer for returned name */
struct statfs {
short f_type; /* type of file system */
u_short f_oflags; /* deprecated 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 */
uid_t f_owner; /* user that mounted the file system */
long f_flags; /* copy of mount flags */
long f_syncwrites; /* count of sync writes since mount */
long f_asyncwrites; /* count of async writes since mount */
long f_spare[1]; /* spare for later */
char f_fstypename[MFSNAMELEN]; /* fs type name */
char f_mntonname[MNAMELEN]; /* directory on which mounted */
char f_mntfromname[MNAMELEN]; /* mounted file system */
};
/*
* File system types.
*/
#define MOUNT_FFS "ffs" /* UNIX "Fast" Filesystem */
#define MOUNT_UFS MOUNT_FFS /* for compatibility */
#define MOUNT_NFS "nfs" /* Network Filesystem */
#define MOUNT_MFS "mfs" /* Memory Filesystem */
#define MOUNT_MSDOS "msdos" /* MSDOS Filesystem */
#define MOUNT_LFS "lfs" /* Log-based Filesystem */
#define MOUNT_FDESC "fdesc" /* File Descriptor Filesystem */
#define MOUNT_PORTAL "portal" /* Portal Filesystem */
#define MOUNT_NULL "null" /* Minimal Filesystem Layer */
#define MOUNT_OVERLAY "overlay" /* Minimal Overlay Filesystem Layer */
#define MOUNT_UMAP "umap" /* User/Group Identifier Remapping Filesystem */
#define MOUNT_KERNFS "kernfs" /* Kernel Information Filesystem */
#define MOUNT_PROCFS "procfs" /* /proc Filesystem */
#define MOUNT_AFS "afs" /* Andrew Filesystem */
#define MOUNT_CD9660 "cd9660" /* ISO9660 (aka CDROM) Filesystem */
#define MOUNT_UNION "union" /* Union (translucent) Filesystem */
#define MOUNT_ADOSFS "adosfs" /* AmigaDOS Filesystem */
#define MOUNT_EXT2FS "ext2fs" /* Second Extended Filesystem */
#define MOUNT_CFS "coda" /* Coda Filesystem */
#define MOUNT_CODA "coda" /* Coda Filesystem */
#define MOUNT_FILECORE "filecore" /* Acorn Filecore Filesystem */
#define MOUNT_NTFS "ntfs" /* Windows/NT Filesystem */
/*
* 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 {
CIRCLEQ_ENTRY(mount) mnt_list; /* mount list */
struct vfsops *mnt_op; /* operations on fs */
struct vnode *mnt_vnodecovered; /* vnode we mounted on */
struct vnode *mnt_syncer; /* syncer vnode */
struct vnodelst mnt_vnodelist; /* list of vnodes this mount */
struct lock mnt_lock; /* mount structure lock */
int mnt_flag; /* flags */
int mnt_maxsymlinklen; /* max size of short symlink */
int mnt_fs_bshift; /* offset shift for lblkno */
int mnt_dev_bshift; /* shift for device sectors */
struct statfs mnt_stat; /* cache of filesystem stats */
qaddr_t mnt_data; /* private data */
int mnt_wcnt; /* count of vfs_busy waiters */
struct proc *mnt_unmounter; /* who is unmounting */
};
/*
* Mount flags. XXX BEWARE: these are not in numerical order!
*
* Unmount uses MNT_FORCE flag.
*
* Note that all mount flags are listed here. if you need to add one, take
* one of the __MNT_UNUSED flags.
*/
#define __MNT_UNUSED2 0x00400000
#define __MNT_UNUSED3 0x00800000
#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 */
#define MNT_NOCOREDUMP 0x00008000 /* don't write core dumps to this FS */
#define MNT_IGNORE 0x00100000 /* don't show entry in df */
#define MNT_NOATIME 0x04000000 /* Never update access times in fs */
#define MNT_SYMPERM 0x20000000 /* recognize symlink permission */
#define MNT_NODEVMTIME 0x40000000 /* Never update mod times for devs */
#define MNT_SOFTDEP 0x80000000 /* Use soft dependencies */
/*
* 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 */
#define MNT_EXNORESPORT 0x08000000 /* don't enforce reserved ports (NFS) */
#define MNT_EXPUBLIC 0x10000000 /* 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 */
/*
* Mask of flags that are visible to statfs()
*/
#define MNT_VISFLAGMASK 0xfc10ffff
/*
* External 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 */
/*
* 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_GONE 0x00200000 /* filesystem is gone.. */
#define MNT_UNMOUNT 0x01000000 /* unmount in progress */
#define MNT_WANTRDWR 0x02000000 /* 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.
*
* Note the slightly non-flat nature of these sysctl numbers. Oh for
* a better sysctl interface.
*/
#define VFS_GENERIC 0 /* generic filesystem information */
#define VFS_MAXTYPENUM 1 /* int: highest defined fs type */
#define VFS_CONF 2 /* struct: vfsconf for filesystem given
as next argument */
#define VFS_USERMOUNT 3 /* enable/disable fs mnt by non-root */
#define VFSGEN_MAXID 4 /* number of valid vfs.generic ids */
/*
* XXX NOTE! These must be in the order of mountcompatnames[] in
* XXX sys/kern/vfs_syscalls.c!
*
* USE THE SAME NAMES AS MOUNT_*!
*/
#define CTL_VFS_NAMES { \
{ "generic", CTLTYPE_NODE }, \
{ MOUNT_FFS, CTLTYPE_NODE }, \
{ MOUNT_NFS, CTLTYPE_NODE }, \
{ MOUNT_MFS, CTLTYPE_NODE }, \
{ MOUNT_MSDOS, CTLTYPE_NODE }, \
{ MOUNT_LFS, CTLTYPE_NODE }, \
{ 0, 0 }, /* MOUNT_LOFS */ \
{ MOUNT_FDESC, CTLTYPE_NODE }, \
{ MOUNT_PORTAL, CTLTYPE_NODE }, \
{ MOUNT_NULL, CTLTYPE_NODE }, \
{ MOUNT_UMAP, CTLTYPE_NODE }, \
{ MOUNT_KERNFS, CTLTYPE_NODE }, \
{ MOUNT_PROCFS, CTLTYPE_NODE }, \
{ MOUNT_AFS, CTLTYPE_NODE }, \
{ MOUNT_CD9660, CTLTYPE_NODE }, \
{ MOUNT_UNION, CTLTYPE_NODE }, \
{ MOUNT_ADOSFS, CTLTYPE_NODE }, \
{ MOUNT_EXT2FS, CTLTYPE_NODE }, \
{ MOUNT_CODA, CTLTYPE_NODE }, \
{ MOUNT_FILECORE, CTLTYPE_NODE }, \
{ MOUNT_NTFS, CTLTYPE_NODE }, \
}
#define VFS_MAXID 20 /* number of valid vfs ids */
#define CTL_VFSGENCTL_NAMES { \
{ 0, 0 }, \
{ "maxtypenum", CTLTYPE_INT }, \
{ "conf", CTLTYPE_NODE }, /* Special */ \
{ "usermount", CTLTYPE_INT }, \
}
/*
* Operations supported on mounted file system.
*/
#ifdef _KERNEL
#if defined(COMPAT_09) || defined(COMPAT_43) || defined(COMPAT_44)
/*
* Filesystem configuration information. Not used by NetBSD, but
* defined here to provide a compatible sysctl interface to Lite2.
*/
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 */
int (*vfc_mountroot)(void); /* if != NULL, routine to mount root */
struct vfsconf *vfc_next; /* next in list */
};
#endif
#if __STDC__
struct nameidata;
struct mbuf;
struct vnodeopv_desc;
#endif
struct vfsops {
const char *vfs_name;
int (*vfs_mount) __P((struct mount *mp, const char *path,
void *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 vnode **vpp));
int (*vfs_vptofh) __P((struct vnode *vp, struct fid *fhp));
void (*vfs_init) __P((void));
void (*vfs_done) __P((void));
int (*vfs_sysctl) __P((int *, u_int, void *, size_t *, void *,
size_t, struct proc *));
int (*vfs_mountroot) __P((void));
int (*vfs_checkexp) __P((struct mount *mp, struct mbuf *nam,
int *extflagsp, struct ucred **credanonp));
const struct vnodeopv_desc * const *vfs_opv_descs;
int vfs_refcount;
LIST_ENTRY(vfsops) vfs_list;
};
#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, VPP) (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
(*(MP)->mnt_op->vfs_checkexp)(MP, NAM, 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 /* synchronously wait for I/O to complete */
#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
#define MNT_LAZY 3 /* push data not written by filesystem syncer */
/*
* 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 */
char *ex_indexfile; /* index file for WebNFS URLs */
};
/*
* 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 */
};
#ifdef _KERNEL
/*
* exported vnode operations
*/
struct mount *vfs_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_setpublicfs /* set publicly exported fs */
__P((struct mount *, struct netexport *, struct export_args *));
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));
void vfs_shutdown __P((void)); /* unmount and sync file systems */
void vfs_unlock __P((struct mount *)); /* unlock a vfs */
void vfs_unmountall __P((struct proc *)); /* unmount file systems */
int vfs_busy __P((struct mount *, int, struct simplelock *));
int vfs_rootmountalloc __P((char *, char *, struct mount **));
void vfs_unbusy __P((struct mount *));
int vfs_attach __P((struct vfsops *));
int vfs_detach __P((struct vfsops *));
struct vfsops *vfs_getopsbyname __P((const char *));
int vfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t,
struct proc *));
extern CIRCLEQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */
extern struct vfsops *vfssw[]; /* filesystem type table */
extern int nvfssw;
extern struct nfs_public nfs_pub;
extern struct simplelock mountlist_slock;
extern struct simplelock spechash_slock;
long makefstype __P((const char *));
int dounmount __P((struct mount *, int, struct proc *));
void vfsinit __P((void));
void vfs_opv_init __P((const struct vnodeopv_desc * const *));
void vfs_opv_free __P((const struct vnodeopv_desc * const *));
#ifdef DEBUG
void vfs_bufstats __P((void));
#endif
LIST_HEAD(vfs_list_head, vfsops);
extern struct vfs_list_head vfs_list;
#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));
#if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
int fhopen __P((const fhandle_t *, int));
int fhstat __P((const fhandle_t *, struct stat *));
int fhstatfs __P((const fhandle_t *, struct statfs *));
#endif /* !_POSIX_C_SOURCE */
__END_DECLS
#endif /* _KERNEL */
#endif /* !_SYS_MOUNT_H_ */
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