400 lines
14 KiB
C
400 lines
14 KiB
C
/* $NetBSD: mount.h,v 1.129 2005/05/29 21:19:41 christos Exp $ */
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/*
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* Copyright (c) 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)mount.h 8.21 (Berkeley) 5/20/95
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*/
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#ifndef _SYS_MOUNT_H_
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#define _SYS_MOUNT_H_
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#ifdef _KERNEL_OPT
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#include "opt_compat_43.h"
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#endif
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#ifndef _KERNEL
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#include <sys/featuretest.h>
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#include <sys/ucred.h>
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#if defined(_NETBSD_SOURCE)
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#include <sys/stat.h>
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#endif /* _NETBSD_SOURCE */
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#endif
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#include <sys/fstypes.h>
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#include <sys/queue.h>
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#include <sys/lock.h>
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#include <sys/statvfs.h>
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/*
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* file system statistics
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*/
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#define MFSNAMELEN 16 /* length of fs type name, including nul */
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#define MNAMELEN 90 /* length of buffer for returned name */
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#if defined(__LIBC12_SOURCE__) || defined(_KERNEL)
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struct statfs12 {
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short f_type; /* type of file system */
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u_short f_oflags; /* deprecated copy of mount flags */
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long f_bsize; /* fundamental file system block size */
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long f_iosize; /* optimal transfer block size */
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long f_blocks; /* total data blocks in file system */
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long f_bfree; /* free blocks in fs */
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long f_bavail; /* free blocks avail to non-superuser */
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long f_files; /* total file nodes in file system */
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long f_ffree; /* free file nodes in fs */
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fsid_t f_fsid; /* file system id */
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uid_t f_owner; /* user that mounted the file system */
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long f_flags; /* copy of mount flags */
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long f_syncwrites; /* count of sync writes since mount */
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long f_asyncwrites; /* count of async writes since mount */
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long f_spare[1]; /* spare for later */
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char f_fstypename[MFSNAMELEN]; /* fs type name */
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char f_mntonname[MNAMELEN]; /* directory on which mounted */
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char f_mntfromname[MNAMELEN]; /* mounted file system */
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};
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#endif
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/*
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* File system types.
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*/
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#define MOUNT_FFS "ffs" /* UNIX "Fast" Filesystem */
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#define MOUNT_UFS MOUNT_FFS /* for compatibility */
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#define MOUNT_NFS "nfs" /* Network Filesystem */
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#define MOUNT_MFS "mfs" /* Memory Filesystem */
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#define MOUNT_MSDOS "msdos" /* MSDOS Filesystem */
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#define MOUNT_LFS "lfs" /* Log-based Filesystem */
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#define MOUNT_FDESC "fdesc" /* File Descriptor Filesystem */
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#define MOUNT_PORTAL "portal" /* Portal Filesystem */
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#define MOUNT_NULL "null" /* Minimal Filesystem Layer */
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#define MOUNT_OVERLAY "overlay" /* Minimal Overlay Filesystem Layer */
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#define MOUNT_UMAP "umap" /* User/Group Identifier Remapping Filesystem */
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#define MOUNT_KERNFS "kernfs" /* Kernel Information Filesystem */
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#define MOUNT_PROCFS "procfs" /* /proc Filesystem */
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#define MOUNT_AFS "afs" /* Andrew Filesystem */
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#define MOUNT_CD9660 "cd9660" /* ISO9660 (aka CDROM) Filesystem */
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#define MOUNT_UNION "union" /* Union (translucent) Filesystem */
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#define MOUNT_ADOSFS "adosfs" /* AmigaDOS Filesystem */
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#define MOUNT_EXT2FS "ext2fs" /* Second Extended Filesystem */
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#define MOUNT_CFS "coda" /* Coda Filesystem */
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#define MOUNT_CODA MOUNT_CFS /* Coda Filesystem */
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#define MOUNT_FILECORE "filecore" /* Acorn Filecore Filesystem */
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#define MOUNT_NTFS "ntfs" /* Windows/NT Filesystem */
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#define MOUNT_SMBFS "smbfs" /* CIFS (SMB) */
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#define MOUNT_PTYFS "ptyfs" /* Pseudo tty filesystem */
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/*
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* Structure per mounted file system. Each mounted file system has an
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* array of operations and an instance record. The file systems are
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* put on a doubly linked list.
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*/
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LIST_HEAD(vnodelst, vnode);
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struct mount {
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CIRCLEQ_ENTRY(mount) mnt_list; /* mount list */
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struct vfsops *mnt_op; /* operations on fs */
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struct vnode *mnt_vnodecovered; /* vnode we mounted on */
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struct vnode *mnt_syncer; /* syncer vnode */
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struct vnodelst mnt_vnodelist; /* list of vnodes this mount */
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struct lock mnt_lock; /* mount structure lock */
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int mnt_flag; /* flags */
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int mnt_iflag; /* internal flags */
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int mnt_fs_bshift; /* offset shift for lblkno */
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int mnt_dev_bshift; /* shift for device sectors */
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struct statvfs mnt_stat; /* cache of filesystem stats */
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void *mnt_data; /* private data */
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int mnt_wcnt; /* count of vfs_busy waiters */
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struct proc *mnt_unmounter; /* who is unmounting */
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int mnt_writeopcountupper; /* upper writeops in progress */
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int mnt_writeopcountlower; /* lower writeops in progress */
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struct simplelock mnt_slock; /* mutex for wcnt and
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writeops counters */
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struct mount *mnt_leaf; /* leaf fs we mounted on */
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};
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/*
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* Sysctl CTL_VFS definitions.
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*
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* Second level identifier specifies which filesystem. Second level
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* identifier VFS_GENERIC returns information about all filesystems.
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*
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* Note the slightly non-flat nature of these sysctl numbers. Oh for
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* a better sysctl interface.
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*/
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#define VFS_GENERIC 0 /* generic filesystem information */
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#define VFS_MAXTYPENUM 1 /* int: highest defined fs type */
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#define VFS_CONF 2 /* struct: vfsconf for filesystem given
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as next argument */
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#define VFS_USERMOUNT 3 /* enable/disable fs mnt by non-root */
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#define VFSGEN_MAXID 4 /* number of valid vfs.generic ids */
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/*
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* USE THE SAME NAMES AS MOUNT_*!
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*
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* Only need to add new entry here if the filesystem actually supports
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* sysctl(2).
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*/
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#define CTL_VFS_NAMES { \
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{ "generic", CTLTYPE_NODE }, \
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{ MOUNT_FFS, CTLTYPE_NODE }, \
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{ MOUNT_NFS, CTLTYPE_NODE }, \
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{ MOUNT_MFS, CTLTYPE_NODE }, \
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{ MOUNT_MSDOS, CTLTYPE_NODE }, \
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{ MOUNT_LFS, CTLTYPE_NODE }, \
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{ 0, 0 }, /* MOUNT_LOFS */ \
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{ MOUNT_FDESC, CTLTYPE_NODE }, \
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{ MOUNT_PORTAL, CTLTYPE_NODE }, \
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{ MOUNT_NULL, CTLTYPE_NODE }, \
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{ MOUNT_UMAP, CTLTYPE_NODE }, \
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{ MOUNT_KERNFS, CTLTYPE_NODE }, \
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{ MOUNT_PROCFS, CTLTYPE_NODE }, \
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{ MOUNT_AFS, CTLTYPE_NODE }, \
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{ MOUNT_CD9660, CTLTYPE_NODE }, \
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{ MOUNT_UNION, CTLTYPE_NODE }, \
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{ MOUNT_ADOSFS, CTLTYPE_NODE }, \
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{ MOUNT_EXT2FS, CTLTYPE_NODE }, \
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{ MOUNT_CODA, CTLTYPE_NODE }, \
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{ MOUNT_FILECORE, CTLTYPE_NODE }, \
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{ MOUNT_NTFS, CTLTYPE_NODE }, \
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}
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#define VFS_MAXID 20 /* number of valid vfs ids */
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#define CTL_VFSGENCTL_NAMES { \
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{ 0, 0 }, \
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{ "maxtypenum", CTLTYPE_INT }, \
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{ "conf", CTLTYPE_NODE }, /* Special */ \
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{ "usermount", CTLTYPE_INT }, \
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}
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/*
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* Operations supported on mounted file system.
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*/
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#ifdef _KERNEL
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#if defined(COMPAT_09) || defined(COMPAT_43) || defined(COMPAT_44)
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/*
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* Filesystem configuration information. Not used by NetBSD, but
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* defined here to provide a compatible sysctl interface to Lite2.
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*/
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struct vfsconf {
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struct vfsops *vfc_vfsops; /* filesystem operations vector */
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char vfc_name[MFSNAMELEN]; /* filesystem type name */
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int vfc_typenum; /* historic filesystem type number */
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int vfc_refcount; /* number mounted of this type */
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int vfc_flags; /* permanent flags */
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int (*vfc_mountroot)(void); /* if != NULL, routine to mount root */
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struct vfsconf *vfc_next; /* next in list */
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};
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#endif
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#if __STDC__
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struct nameidata;
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struct mbuf;
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struct vnodeopv_desc;
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#endif
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struct vfsops {
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const char *vfs_name;
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int (*vfs_mount) (struct mount *, const char *, void *,
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struct nameidata *, struct proc *);
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int (*vfs_start) (struct mount *, int, struct proc *);
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int (*vfs_unmount) (struct mount *, int, struct proc *);
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int (*vfs_root) (struct mount *, struct vnode **);
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int (*vfs_quotactl) (struct mount *, int, uid_t, void *,
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struct proc *);
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int (*vfs_statvfs) (struct mount *, struct statvfs *,
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struct proc *);
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int (*vfs_sync) (struct mount *, int, struct ucred *,
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struct proc *);
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int (*vfs_vget) (struct mount *, ino_t, struct vnode **);
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int (*vfs_fhtovp) (struct mount *, struct fid *,
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struct vnode **);
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int (*vfs_vptofh) (struct vnode *, struct fid *);
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void (*vfs_init) (void);
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void (*vfs_reinit) (void);
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void (*vfs_done) (void);
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int *vfs_wassysctl; /* @@@ no longer useful */
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int (*vfs_mountroot)(void);
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int (*vfs_checkexp) (struct mount *, struct mbuf *, int *,
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struct ucred **);
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int (*vfs_snapshot) (struct mount *, struct vnode *,
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struct timespec *);
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int (*vfs_extattrctl) (struct mount *, int,
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struct vnode *, int, const char *,
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struct proc *);
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const struct vnodeopv_desc * const *vfs_opv_descs;
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int vfs_refcount;
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LIST_ENTRY(vfsops) vfs_list;
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};
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#define VFS_ATTACH(vfs) __link_set_add_data(vfsops, vfs)
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#define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
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(*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
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#define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
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#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
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#define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP)
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#define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
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#define VFS_STATVFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statvfs)(MP, SBP, P)
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#define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P)
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#define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
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#define VFS_FHTOVP(MP, FIDP, VPP) (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
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#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
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(*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
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#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
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#define VFS_SNAPSHOT(MP, VP, TS) (*(MP)->mnt_op->vfs_snapshot)(MP, VP, TS)
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#define VFS_EXTATTRCTL(MP, C, VP, AS, AN, P) \
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(*(MP)->mnt_op->vfs_extattrctl)(MP, C, VP, AS, AN, P)
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#endif /* _KERNEL */
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#ifdef _KERNEL
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#include <net/radix.h>
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#include <sys/socket.h> /* XXX for AF_MAX */
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/*
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* Network address lookup element
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*/
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struct netcred {
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struct radix_node netc_rnodes[2];
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int netc_refcnt;
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int netc_exflags;
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struct ucred netc_anon;
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};
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/*
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* Network export information
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*/
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struct netexport {
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struct netcred ne_defexported; /* Default export */
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struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
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};
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#endif /* _KERNEL */
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/*
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* Export arguments for local filesystem mount calls.
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*/
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struct export_args {
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int ex_flags; /* export related flags */
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uid_t ex_root; /* mapping for root uid */
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struct uucred ex_anon; /* mapping for anonymous user */
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struct sockaddr *ex_addr; /* net address to which exported */
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int ex_addrlen; /* and the net address length */
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struct sockaddr *ex_mask; /* mask of valid bits in saddr */
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int ex_masklen; /* and the smask length */
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char *ex_indexfile; /* index file for WebNFS URLs */
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};
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/*
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* Structure holding information for a publicly exported filesystem
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* (WebNFS). Currently the specs allow just for one such filesystem.
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*/
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struct nfs_public {
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int np_valid; /* Do we hold valid information */
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fhandle_t np_handle; /* Filehandle for pub fs (internal) */
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struct mount *np_mount; /* Mountpoint of exported fs */
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char *np_index; /* Index file */
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};
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#ifdef _KERNEL
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#include <sys/mallocvar.h>
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MALLOC_DECLARE(M_MOUNT);
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/*
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* exported VFS interface (see vfssubr(9))
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*/
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struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */
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int vfs_export /* process mount export info */
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(struct mount *, struct netexport *, struct export_args *);
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#define vfs_showexport(a, b, c) (void)memset((b), 0, sizeof(*(b)))
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struct netcred *vfs_export_lookup /* lookup host in fs export list */
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(struct mount *, struct netexport *, struct mbuf *);
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int vfs_setpublicfs /* set publicly exported fs */
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(struct mount *, struct netexport *, struct export_args *);
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int vfs_mountedon(struct vnode *);/* is a vfs mounted on vp */
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int vfs_mountroot(void);
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void vfs_shutdown(void); /* unmount and sync file systems */
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void vfs_unmountall(struct proc *); /* unmount file systems */
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int vfs_busy(struct mount *, int, struct simplelock *);
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int vfs_rootmountalloc(const char *, const char *, struct mount **);
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void vfs_unbusy(struct mount *);
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int vfs_attach(struct vfsops *);
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int vfs_detach(struct vfsops *);
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void vfs_reinit(void);
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struct vfsops *vfs_getopsbyname(const char *);
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int vfs_stdextattrctl(struct mount *, int, struct vnode *,
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int, const char *, struct proc *);
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extern CIRCLEQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */
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extern struct vfsops *vfssw[]; /* filesystem type table */
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extern int nvfssw;
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extern struct nfs_public nfs_pub;
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extern struct simplelock mountlist_slock;
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extern struct simplelock spechash_slock;
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long makefstype(const char *);
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int dounmount(struct mount *, int, struct proc *);
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void vfsinit(void);
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void vfs_opv_init(const struct vnodeopv_desc * const *);
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void vfs_opv_free(const struct vnodeopv_desc * const *);
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#ifdef DEBUG
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void vfs_bufstats(void);
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#endif
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LIST_HEAD(vfs_list_head, vfsops);
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extern struct vfs_list_head vfs_list;
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#else /* _KERNEL */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#ifdef __LIBC12_SOURCE__
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int fstatfs(int, struct statfs12 *);
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int getfsstat(struct statfs12 *, long, int);
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int statfs(const char *, struct statfs12 *);
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int getmntinfo(struct statfs12 **, int);
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#endif
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int getfh(const char *, fhandle_t *);
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int mount(const char *, const char *, int, void *);
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int unmount(const char *, int);
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#if defined(_NETBSD_SOURCE)
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int fhopen(const fhandle_t *, int);
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int fhstat(const fhandle_t *, struct stat *);
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#ifdef __LIBC12_SOURCE__
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int fhstatfs(const fhandle_t *, struct statfs12 *);
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#endif
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#endif /* _NETBSD_SOURCE */
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__END_DECLS
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#endif /* _KERNEL */
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#endif /* !_SYS_MOUNT_H_ */
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