/* * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright 1997,1998 Julian Elischer. All rights reserved. * julian@freebsd.org * * 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. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``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 HOLDER 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. * * devfsdefs.h */ /* * HISTORY * 8-April-1999 Dieter Siegmund (dieter@apple.com) * Ported to from FreeBSD 3.1 * Removed unnecessary/unused defines * Renamed structures/elements to clarify usage in code. */ #ifndef __DEVFS_DEVFSDEFS_H__ #define __DEVFS_DEVFSDEFS_H__ #include <sys/appleapiopts.h> #ifdef __APPLE_API_PRIVATE #define DEVMAXNAMESIZE 32 /* XXX */ #define DEVMAXPATHSIZE 128 /* XXX */ typedef enum { DEV_DIR, DEV_BDEV, DEV_CDEV, DEV_SLNK } devfstype_t; extern int (**devfs_vnodeop_p)(void *); /* our own vector array for dirs */ extern int (**devfs_spec_vnodeop_p)(void *); /* our own vector array for devs */ extern struct vfsops devfs_vfsops; typedef struct devnode devnode_t; typedef struct devdirent devdirent_t; typedef union devnode_type devnode_type_t; struct devfs_stats { int nodes; int entries; int mounts; int stringspace; }; union devnode_type { dev_t dev; struct { devdirent_t * dirlist; devdirent_t * * dirlast; devnode_t * parent; devdirent_t * myname; /* my entry in .. */ int entrycount; }Dir; struct { char * name; /* must be allocated separately */ int namelen; }Slnk; }; struct devnode { devfstype_t dn_type; int dn_flags; u_short dn_mode; uid_t dn_uid; gid_t dn_gid; struct timespec dn_atime;/* time of last access */ struct timespec dn_mtime;/* time of last modification */ struct timespec dn_ctime;/* time file changed */ int (***dn_ops)(void *);/* yuk... pointer to pointer(s) to funcs */ int dn_links;/* how many file links does this node have? */ struct devfsmount * dn_dvm; /* the mount structure for this 'plane' */ struct vnode * dn_vn; /* address of last vnode that represented us */ int dn_len; /* of any associated info (e.g. dir data) */ devdirent_t * dn_linklist;/* circular list of hardlinks to this node */ devnode_t * dn_nextsibling; /* the list of equivalent nodes */ devnode_t * * dn_prevsiblingp;/* backpointer for the above */ devnode_type_t dn_typeinfo; int dn_delete; /* mark for deletion */ int dn_change; int dn_update; int dn_access; int dn_lflags; }; #define DN_BUSY 0x01 #define DN_DELETE 0x02 #define DN_CREATE 0x04 #define DN_CREATEWAIT 0x08 struct devdirent { /*-----------------------directory entry fields-------------*/ char de_name[DEVMAXNAMESIZE]; devnode_t * de_dnp; /* the "inode" (devnode) pointer */ devnode_t * de_parent; /* backpointer to the directory itself */ devdirent_t * de_next; /* next object in this directory */ devdirent_t * *de_prevp; /* previous pointer in directory linked list */ devdirent_t * de_nextlink; /* next hardlink to this node */ devdirent_t * *de_prevlinkp; /* previous hardlink pointer for this node */ }; extern devdirent_t * dev_root; extern struct devfs_stats devfs_stats; extern lck_mtx_t devfs_mutex; /* * Rules for front nodes: * Dirs hava a strict 1:1 relationship with their OWN devnode * Symlinks similarly * Device Nodes ALWAYS point to the devnode that is linked * to the Backing node. (with a ref count) */ /* * DEVFS specific per/mount information, used to link a monted fs to a * particular 'plane' of front nodes. */ struct devfsmount { struct mount * mount; /* vfs mount struct for this fs */ devdirent_t * plane_root;/* the root of this 'plane' */ }; /* * Prototypes for DEVFS virtual filesystem operations */ #include <sys/lock.h> #include <miscfs/devfs/devfs_proto.h> //#define HIDDEN_MOUNTPOINT 1 /* misc */ #define M_DEVFSNAME M_DEVFS #define M_DEVFSNODE M_DEVFS #define M_DEVFSMNT M_DEVFS #define VTODN(vp) ((devnode_t *)(vp)->v_data) #define DEVFS_LOCK() lck_mtx_lock(&devfs_mutex) #define DEVFS_UNLOCK() lck_mtx_unlock(&devfs_mutex) static __inline__ void DEVFS_INCR_ENTRIES() { OSAddAtomic(1, &devfs_stats.entries); } static __inline__ void DEVFS_DECR_ENTRIES() { OSAddAtomic(-1, &devfs_stats.entries); } static __inline__ void DEVFS_INCR_NODES() { OSAddAtomic(1, &devfs_stats.nodes); } static __inline__ void DEVFS_DECR_NODES() { OSAddAtomic(-1, &devfs_stats.nodes); } static __inline__ void DEVFS_INCR_MOUNTS() { OSAddAtomic(1, &devfs_stats.mounts); } static __inline__ void DEVFS_DECR_MOUNTS() { OSAddAtomic(-1, &devfs_stats.mounts); } static __inline__ void DEVFS_INCR_STRINGSPACE(int space) { OSAddAtomic(space, &devfs_stats.stringspace); } static __inline__ void DEVFS_DECR_STRINGSPACE(int space) { OSAddAtomic(-space, &devfs_stats.stringspace); } static __inline__ void dn_times(devnode_t * dnp, struct timeval *t1, struct timeval *t2, struct timeval *t3) { if (dnp->dn_access) { dnp->dn_atime.tv_sec = t1->tv_sec; dnp->dn_atime.tv_nsec = t1->tv_usec * 1000; dnp->dn_access = 0; } if (dnp->dn_update) { dnp->dn_mtime.tv_sec = t2->tv_sec; dnp->dn_mtime.tv_nsec = t2->tv_usec * 1000; dnp->dn_update = 0; } if (dnp->dn_change) { dnp->dn_ctime.tv_sec = t3->tv_sec; dnp->dn_ctime.tv_nsec = t3->tv_usec * 1000; dnp->dn_change = 0; } return; } static __inline__ void dn_copy_times(devnode_t * target, devnode_t * source) { target->dn_atime = source->dn_atime; target->dn_mtime = source->dn_mtime; target->dn_ctime = source->dn_ctime; return; } #endif /* __APPLE_API_PRIVATE */ #endif /* __DEVFS_DEVFSDEFS_H__ */