mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
afbbfd3b05
warnings for the recent change of the type of a module event handler. Fixed a rotted comment (numeric types of filesystems are not listed here). Made the function protototype in VFS_SET() more like the corresponding function definition (don't use extern for prototypes). Enforce a semicolon after the LKM case of VFS_SET().
453 lines
16 KiB
C
453 lines
16 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* $Id: mount.h,v 1.72 1998/11/10 09:04:09 peter Exp $
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*/
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#ifndef _SYS_MOUNT_H_
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#define _SYS_MOUNT_H_
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#include <sys/ucred.h>
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#include <sys/queue.h>
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#include <sys/lock.h>
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typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
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/*
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* File identifier.
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* These are unique per filesystem on a single machine.
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*/
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#define MAXFIDSZ 16
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struct fid {
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u_short fid_len; /* length of data in bytes */
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u_short fid_reserved; /* force longword alignment */
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char fid_data[MAXFIDSZ]; /* data (variable length) */
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};
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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 null */
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#define MNAMELEN 90 /* length of buffer for returned name */
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struct statfs {
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long f_spare2; /* placeholder */
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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 filesystem */
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int f_type; /* type of filesystem */
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int f_flags; /* copy of mount exported 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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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 filesystem */
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};
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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 vfsconf *mnt_vfc; /* configuration info */
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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 shared with user */
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int mnt_kern_flag; /* kernel only flags */
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int mnt_maxsymlinklen; /* max size of short symlink */
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struct statfs mnt_stat; /* cache of filesystem stats */
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qaddr_t mnt_data; /* private data */
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time_t mnt_time; /* last time written*/
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};
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/*
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* User specifiable flags.
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*/
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#define MNT_RDONLY 0x00000001 /* read only filesystem */
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#define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
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#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
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#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
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#define MNT_NODEV 0x00000010 /* don't interpret special files */
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#define MNT_UNION 0x00000020 /* union with underlying filesystem */
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#define MNT_ASYNC 0x00000040 /* file system written asynchronously */
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#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
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#define MNT_SOFTDEP 0x00200000 /* soft updates being done */
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#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
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#define MNT_NOATIME 0x10000000 /* disable update of file access time */
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#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
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#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
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/*
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* NFS export related mount flags.
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*/
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#define MNT_EXRDONLY 0x00000080 /* exported read only */
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#define MNT_EXPORTED 0x00000100 /* file system is exported */
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#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
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#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
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#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
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#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */
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/*
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* Flags set by internal operations,
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* but visible to the user.
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* XXX some of these are not quite right.. (I've never seen the root flag set)
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*/
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#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
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#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
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#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
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#define MNT_USER 0x00008000 /* mounted by a user */
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/*
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* Mask of flags that are visible to statfs()
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* XXX I think that this could now become (~(MNT_CMDFLAGS))
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* but the 'mount' program may need changing to handle this.
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* XXX MNT_EXPUBLIC is presently left out. I don't know why.
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*/
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#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
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MNT_NOSUID | MNT_NODEV | MNT_UNION | \
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MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
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MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
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MNT_LOCAL | MNT_USER | MNT_QUOTA | \
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MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
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MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP \
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/* | MNT_EXPUBLIC */)
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/*
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* External filesystem command modifier flags.
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* Unmount can use the MNT_FORCE flag.
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* XXX These are not STATES and really should be somewhere else.
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*/
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#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
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#define MNT_DELEXPORT 0x00020000 /* delete export host lists */
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#define MNT_RELOAD 0x00040000 /* reload filesystem data */
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#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
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#define MNT_CMDFLAGS (MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)
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/*
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* Internal filesystem control flags stored in mnt_kern_flag.
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*
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* MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
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* past the mount point. This keeps the subtree stable during mounts
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* and unmounts.
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*/
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#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
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#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
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#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
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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_VFSCONF returns information about all filesystems.
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* Second level identifier VFS_GENERIC is non-terminal.
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*/
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#define VFS_VFSCONF 0 /* get configured filesystems */
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#define VFS_GENERIC 0 /* generic filesystem information */
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/*
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* Third level identifiers for VFS_GENERIC are given below; third
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* level identifiers for specific filesystems are given in their
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* mount specific header files.
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*/
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#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem 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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/*
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* Flags for various system call interfaces.
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*
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* waitfor flags to vfs_sync() and getfsstat()
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*/
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#define MNT_WAIT 1 /* synchronously wait for I/O to complete */
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#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
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#define MNT_LAZY 3 /* push data not written by filesystem syncer */
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/*
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* Generic file handle
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*/
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struct fhandle {
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fsid_t fh_fsid; /* File system id of mount point */
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struct fid fh_fid; /* File sys specific id */
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};
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typedef struct fhandle fhandle_t;
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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 ucred 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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/*
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* Filesystem configuration information. One of these exists for each
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* type of filesystem supported by the kernel. These are searched at
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* mount time to identify the requested filesystem.
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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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struct vfsconf *vfc_next; /* next in list */
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};
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struct ovfsconf {
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void *vfc_vfsops;
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char vfc_name[32];
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int vfc_index;
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int vfc_refcount;
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int vfc_flags;
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};
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/*
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* NB: these flags refer to IMPLEMENTATION properties, not properties of
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* any actual mounts; i.e., it does not make sense to change the flags.
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*/
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#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
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#define VFCF_NETWORK 0x00020000 /* may get data over the network */
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#define VFCF_READONLY 0x00040000 /* writes are not implemented */
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#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
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#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
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#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode*/
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#ifdef KERNEL
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_MOUNT);
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#endif
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extern int maxvfsconf; /* highest defined filesystem type */
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extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
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extern struct vfsconf *vfsconf; /* head of list of filesystem types */
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/*
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* Operations supported on mounted file system.
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*/
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#ifdef __STDC__
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struct nameidata;
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struct mbuf;
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#endif
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struct vfsops {
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int (*vfs_mount) __P((struct mount *mp, char *path, caddr_t data,
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struct nameidata *ndp, struct proc *p));
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int (*vfs_start) __P((struct mount *mp, int flags,
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struct proc *p));
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int (*vfs_unmount) __P((struct mount *mp, int mntflags,
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struct proc *p));
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int (*vfs_root) __P((struct mount *mp, struct vnode **vpp));
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int (*vfs_quotactl) __P((struct mount *mp, int cmds, uid_t uid,
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caddr_t arg, struct proc *p));
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int (*vfs_statfs) __P((struct mount *mp, struct statfs *sbp,
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struct proc *p));
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int (*vfs_sync) __P((struct mount *mp, int waitfor,
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struct ucred *cred, struct proc *p));
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int (*vfs_vget) __P((struct mount *mp, ino_t ino,
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struct vnode **vpp));
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int (*vfs_fhtovp) __P((struct mount *mp, struct fid *fhp,
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struct sockaddr *nam, struct vnode **vpp,
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int *exflagsp, struct ucred **credanonp));
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int (*vfs_vptofh) __P((struct vnode *vp, struct fid *fhp));
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int (*vfs_init) __P((struct vfsconf *));
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int (*vfs_uninit) __P((struct vfsconf *));
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struct sysctl_oid *vfs_oid;
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};
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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_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(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, NAM, VPP, EXFLG, CRED) \
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(*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, NAM, VPP, EXFLG, CRED)
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#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
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#if defined(VFS_LKM) && !defined(KLD_MODULE)
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#include <sys/conf.h>
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#include <sys/exec.h>
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#include <sys/sysent.h>
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#include <sys/lkm.h>
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#define VFS_SET(vfsops, fsname, flags) \
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static struct vfsconf _fs_vfsconf = { \
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&vfsops, \
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#fsname, \
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-1, \
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0, \
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flags, \
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}; \
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extern struct linker_set MODVNOPS; \
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MOD_VFS(fsname,&MODVNOPS,&_fs_vfsconf); \
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int \
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fsname ## _mod(struct lkm_table *lkmtp, int cmd, int ver); \
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int \
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fsname ## _mod(struct lkm_table *lkmtp, int cmd, int ver) { \
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MOD_DISPATCH(fsname, \
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lkmtp, cmd, ver, lkm_nullcmd, lkm_nullcmd, lkm_nullcmd); } \
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struct __hack
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#else
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#include <sys/module.h>
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#define VFS_SET(vfsops, fsname, flags) \
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static struct vfsconf fsname ## _vfsconf = { \
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&vfsops, \
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#fsname, \
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-1, \
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0, \
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flags \
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}; \
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static moduledata_t fsname ## _mod = { \
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#fsname, \
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vfs_modevent, \
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& fsname ## _vfsconf \
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}; \
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DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
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#endif /* VFS_LKM */
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#include <net/radix.h>
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#define AF_MAX 31 /* XXX */
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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_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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extern char *mountrootfsname;
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/*
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* exported vnode operations
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*/
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int dounmount __P((struct mount *, int, struct proc *));
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int vfs_setpublicfs /* set publicly exported fs */
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__P((struct mount *, struct netexport *, struct export_args *));
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int vfs_lock __P((struct mount *)); /* lock a vfs */
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void vfs_msync __P((struct mount *, int));
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void vfs_unlock __P((struct mount *)); /* unlock a vfs */
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int vfs_busy __P((struct mount *, int, struct simplelock *, struct proc *));
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int vfs_export /* process mount export info */
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__P((struct mount *, struct netexport *, struct export_args *));
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struct netcred *vfs_export_lookup /* lookup host in fs export list */
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__P((struct mount *, struct netexport *, struct sockaddr *));
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int vfs_allocate_syncvnode __P((struct mount *));
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void vfs_getnewfsid __P((struct mount *));
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struct mount *vfs_getvfs __P((fsid_t *)); /* return vfs given fsid */
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int vfs_modevent __P((module_t, int, void *));
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int vfs_mountedon __P((struct vnode *)); /* is a vfs mounted on vp */
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int vfs_rootmountalloc __P((char *, char *, struct mount **));
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void vfs_unbusy __P((struct mount *, struct proc *));
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void vfs_unmountall __P((void));
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int vfs_register __P((struct vfsconf *));
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int vfs_unregister __P((struct vfsconf *));
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extern CIRCLEQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */
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extern struct simplelock mountlist_slock;
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extern struct nfs_public nfs_pub;
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#else /* !KERNEL */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int fstatfs __P((int, struct statfs *));
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int getfh __P((const char *, fhandle_t *));
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int getfsstat __P((struct statfs *, long, int));
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int getmntinfo __P((struct statfs **, int));
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int mount __P((const char *, const char *, int, void *));
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int statfs __P((const char *, struct statfs *));
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int unmount __P((const char *, int));
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/* C library stuff */
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void endvfsent __P((void));
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struct ovfsconf *getvfsbyname __P((const char *));
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struct ovfsconf *getvfsbytype __P((int));
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struct ovfsconf *getvfsent __P((void));
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#define getvfsbyname new_getvfsbyname
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int new_getvfsbyname __P((const char *, struct vfsconf *));
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void setvfsent __P((int));
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int vfsisloadable __P((const char *));
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int vfsload __P((const char *));
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__END_DECLS
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#endif /* KERNEL */
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#endif /* !_SYS_MOUNT_H_ */
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