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/*
* 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
* $Id: mount.h,v 1.73 1998/11/15 15:12:58 bde Exp $
*/
#ifndef _SYS_MOUNT_H_
#define _SYS_MOUNT_H_
#include <sys/ucred.h>
#include <sys/queue.h>
#include <sys/lock.h>
typedef struct fsid { 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 null */
#define MNAMELEN 90 /* length of buffer for returned name */
struct statfs {
long f_spare2; /* placeholder */
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 filesystem */
int f_type; /* type of filesystem */
int f_flags; /* copy of mount exported flags */
long f_syncwrites; /* count of sync writes since mount */
long f_asyncwrites; /* count of async writes since mount */
char f_fstypename[MFSNAMELEN]; /* fs type name */
char f_mntonname[MNAMELEN]; /* directory on which mounted */
char f_mntfromname[MNAMELEN];/* mounted 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 vfsconf *mnt_vfc; /* configuration info */
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 shared with user */
int mnt_kern_flag; /* kernel only flags */
int mnt_maxsymlinklen; /* max size of short symlink */
struct statfs mnt_stat; /* cache of filesystem stats */
qaddr_t mnt_data; /* private data */
time_t mnt_time; /* last time written*/
};
/*
* User specifiable flags.
*/
#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_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
#define MNT_SOFTDEP 0x00200000 /* soft updates being done */
#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
#define MNT_NOATIME 0x10000000 /* disable update of file access time */
#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
/*
* NFS export related 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_EXPUBLIC 0x20000000 /* public export (WebNFS) */
/*
* Flags set by internal operations,
* but visible to the user.
* XXX some of these are not quite right.. (I've never seen the root flag set)
*/
#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()
* XXX I think that this could now become (~(MNT_CMDFLAGS))
* but the 'mount' program may need changing to handle this.
* XXX MNT_EXPUBLIC is presently left out. I don't know why.
*/
#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_USER | MNT_QUOTA | \
MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP \
/* | MNT_EXPUBLIC */)
/*
* External filesystem command modifier flags.
* Unmount can use the MNT_FORCE flag.
* XXX These are not STATES and really should be somewhere else.
*/
#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_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
/*
* Internal filesystem control flags stored in mnt_kern_flag.
*
* MNTK_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 MNTK_UNMOUNT 0x01000000 /* unmount in progress */
#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
/*
* Sysctl CTL_VFS definitions.
*
* Second level identifier specifies which filesystem. Second level
* identifier VFS_VFSCONF returns information about all filesystems.
* Second level identifier VFS_GENERIC is non-terminal.
*/
#define VFS_VFSCONF 0 /* get configured 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 /* 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;
/*
* 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 */
};
/*
* Filesystem configuration information. One of these exists for each
* type of filesystem supported by the kernel. These are searched at
* mount time to identify the requested filesystem.
*/
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 */
struct vfsconf *vfc_next; /* next in list */
};
struct ovfsconf {
void *vfc_vfsops;
char vfc_name[32];
int vfc_index;
int vfc_refcount;
int vfc_flags;
};
/*
* NB: these flags refer to IMPLEMENTATION properties, not properties of
* any actual mounts; i.e., it does not make sense to change the flags.
*/
#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
#define VFCF_NETWORK 0x00020000 /* may get data over the network */
#define VFCF_READONLY 0x00040000 /* writes are not implemented */
#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/
#ifdef KERNEL
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_MOUNT);
#endif
extern int maxvfsconf; /* highest defined filesystem type */
extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
extern struct vfsconf *vfsconf; /* head of list of filesystem types */
/*
* Operations supported on mounted file system.
*/
#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 sockaddr *nam, struct vnode **vpp,
int *exflagsp, struct ucred **credanonp));
int (*vfs_vptofh) __P((struct vnode *vp, struct fid *fhp));
int (*vfs_init) __P((struct vfsconf *));
int (*vfs_uninit) __P((struct vfsconf *));
struct sysctl_oid *vfs_oid;
};
#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)
#if defined(VFS_LKM) && !defined(KLD_MODULE)
#include <sys/conf.h>
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
#define VFS_SET(vfsops, fsname, flags) \
static struct vfsconf _fs_vfsconf = { \
&vfsops, \
#fsname, \
-1, \
0, \
flags, \
}; \
extern struct linker_set MODVNOPS; \
MOD_VFS(fsname,&MODVNOPS,&_fs_vfsconf); \
int \
fsname ## _mod(struct lkm_table *lkmtp, int cmd, int ver); \
int \
fsname ## _mod(struct lkm_table *lkmtp, int cmd, int ver) { \
MOD_DISPATCH(fsname, \
lkmtp, cmd, ver, lkm_nullcmd, lkm_nullcmd, lkm_nullcmd); } \
struct __hack
#else
#include <sys/module.h>
#define VFS_SET(vfsops, fsname, flags) \
static struct vfsconf fsname ## _vfsconf = { \
&vfsops, \
#fsname, \
-1, \
0, \
flags \
}; \
static moduledata_t fsname ## _mod = { \
#fsname, \
vfs_modevent, \
& fsname ## _vfsconf \
}; \
DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
#endif /* VFS_LKM */
#include <net/radix.h>
#define AF_MAX 31 /* XXX */
/*
* 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 */
};
extern char *mountrootfsname;
/*
* exported vnode operations
*/
int dounmount __P((struct mount *, int, struct proc *));
int vfs_setpublicfs /* set publicly exported fs */
__P((struct mount *, struct netexport *, struct export_args *));
int vfs_lock __P((struct mount *)); /* lock a vfs */
void vfs_msync __P((struct mount *, int));
void vfs_unlock __P((struct mount *)); /* unlock a vfs */
int vfs_busy __P((struct mount *, int, struct simplelock *, struct proc *));
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 sockaddr *));
int vfs_allocate_syncvnode __P((struct mount *));
void vfs_getnewfsid __P((struct mount *));
struct mount *vfs_getvfs __P((fsid_t *)); /* return vfs given fsid */
int vfs_modevent __P((module_t, int, void *));
int vfs_mountedon __P((struct vnode *)); /* is a vfs mounted on vp */
int vfs_rootmountalloc __P((char *, char *, struct mount **));
void vfs_unbusy __P((struct mount *, struct proc *));
void vfs_unmountall __P((void));
int vfs_register __P((struct vfsconf *));
int vfs_unregister __P((struct vfsconf *));
extern CIRCLEQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */
extern struct simplelock mountlist_slock;
extern struct nfs_public nfs_pub;
#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));
/* C library stuff */
void endvfsent __P((void));
struct ovfsconf *getvfsbyname __P((const char *));
struct ovfsconf *getvfsbytype __P((int));
struct ovfsconf *getvfsent __P((void));
#define getvfsbyname new_getvfsbyname
int new_getvfsbyname __P((const char *, struct vfsconf *));
void setvfsent __P((int));
int vfsisloadable __P((const char *));
int vfsload __P((const char *));
__END_DECLS
#endif /* KERNEL */
#endif /* !_SYS_MOUNT_H_ */
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