/* * * Coda: an Experimental Distributed File System * Release 3.1 * * Copyright (c) 1987-1998 Carnegie Mellon University * All Rights Reserved * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation, and * that credit is given to Carnegie Mellon University in all documents * and publicity pertaining to direct or indirect use of this code or its * derivatives. * * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF * ANY DERIVATIVE WORK. * * Carnegie Mellon encourages users of this software to return any * improvements or extensions that they make, and to grant Carnegie * Mellon the rights to redistribute these changes without encumbrance. * * @(#) src/sys/cfs/cnode.h,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ * $Id: $ * */ /* * Mach Operating System * Copyright (c) 1990 Carnegie-Mellon University * Copyright (c) 1989 Carnegie-Mellon University * All rights reserved. The CMU software License Agreement specifies * the terms and conditions for use and redistribution. */ /* * This code was written for the Coda file system at Carnegie Mellon University. * Contributers include David Steere, James Kistler, and M. Satyanarayanan. */ /* * HISTORY * $Log: cnode.h,v $ * Revision 1.1.1.1 1998/08/29 21:14:52 rvb * Very Preliminary Coda * * Revision 1.10 1998/08/28 18:12:25 rvb * Now it also works on FreeBSD -current. This code will be * committed to the FreeBSD -current and NetBSD -current * trees. It will then be tailored to the particular platform * by flushing conditional code. * * Revision 1.9 1998/08/18 17:05:24 rvb * Don't use __RCSID now * * Revision 1.8 1998/08/18 16:31:49 rvb * Sync the code for NetBSD -current; test on 1.3 later * * Revision 1.7 98/02/24 22:22:53 rvb * Fixes up mainly to flush iopen and friends * * Revision 1.6 98/01/31 20:53:19 rvb * First version that works on FreeBSD 2.2.5 * * Revision 1.5 98/01/23 11:53:51 rvb * Bring RVB_CFS1_1 to HEAD * * Revision 1.4.2.5 98/01/23 11:21:14 rvb * Sync with 2.2.5 * * Revision 1.4.2.4 98/01/22 13:03:38 rvb * Had Breaken ls . * * Revision 1.4.2.3 97/12/19 14:26:09 rvb * session id * * Revision 1.4.2.2 97/12/16 12:40:24 rvb * Sync with 1.3 * * Revision 1.4.2.1 97/12/06 17:41:28 rvb * Sync with peters coda.h * * Revision 1.4 97/12/05 10:39:30 rvb * Read CHANGES * * Revision 1.3.18.2 97/11/12 12:09:45 rvb * reorg pass1 * * Revision 1.3.18.1 97/10/29 16:06:31 rvb * Kill DYING * * Revision 1.3 1996/12/12 22:11:03 bnoble * Fixed the "downcall invokes venus operation" deadlock in all known cases. * There may be more. * * Revision 1.2 1996/01/02 16:57:26 bnoble * Added support for Coda MiniCache and raw inode calls (final commit) * * Revision 1.1.2.1 1995/12/20 01:57:53 bnoble * Added CFS-specific files * * Revision 3.1.1.1 1995/03/04 19:08:23 bnoble * Branch for NetBSD port revisions * * Revision 3.1 1995/03/04 19:08:23 bnoble * Bump to major revision 3 to prepare for NetBSD port * * Revision 2.2 1994/12/06 13:39:18 dcs * Add a flag value to indicate a cnode was orphaned, e.g. the venus * that created it has exited. This will allow one to restart venus * even though some process may be cd'd into /coda. * * Revision 2.1 94/07/21 16:25:33 satya * Conversion to C++ 3.0; start of Coda Release 2.0 * * Revision 1.2.7.1 94/06/16 11:26:02 raiff * Branch for release beta-16Jun1994_39118 * * Revision 1.2 92/10/27 17:58:41 lily * merge kernel/latest and alpha/src/cfs * * Revision 2.3 92/09/30 14:16:53 mja * Picked up fixed #ifdef _KERNEL. Also... * * Substituted rvb's history blurb so that we agree with Mach 2.5 sources. * [91/02/09 jjk] * * Added contributors blurb. * [90/12/13 jjk] * * Revision 2.2 90/07/05 11:27:24 mrt * Created for the Coda File System. * [90/05/23 dcs] * * Revision 1.4 90/05/31 17:02:16 dcs * Prepare for merge with facilities kernel. * * * */ #ifndef _CNODE_H_ #define _CNODE_H_ #include #include #include MALLOC_DECLARE(M_CFS); /* * tmp below since we need struct queue */ #include /* * Cnode lookup stuff. * NOTE: CFS_CACHESIZE must be a power of 2 for cfshash to work! */ #define CFS_CACHESIZE 512 #define CFS_ALLOC(ptr, cast, size) \ do { \ ptr = (cast)malloc((unsigned long) size, M_CFS, M_WAITOK); \ if (ptr == 0) { \ panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ } \ } while (0) #define CFS_FREE(ptr, size) free((ptr), M_CFS) /* * global cache state control */ extern int cfsnc_use; /* * Used to select debugging statements throughout the cfs code. */ extern int cfsdebug; extern int cfsnc_debug; extern int cfs_printf_delay; extern int cfs_vnop_print_entry; extern int cfs_psdev_print_entry; extern int cfs_vfsop_print_entry; #define CFSDBGMSK(N) (1 << N) #define CFSDEBUG(N, STMT) { if (cfsdebug & CFSDBGMSK(N)) { STMT } } #define myprintf(args) \ do { \ if (cfs_printf_delay) \ DELAY(cfs_printf_delay);\ printf args ; \ } while (0) struct cnode { struct vnode *c_vnode; u_short c_flags; /* flags (see below) */ ViceFid c_fid; /* file handle */ struct lock c_lock; /* new lock protocol */ struct vnode *c_ovp; /* open vnode pointer */ u_short c_ocount; /* count of openers */ u_short c_owrite; /* count of open for write */ struct vattr c_vattr; /* attributes */ char *c_symlink; /* pointer to symbolic link */ u_short c_symlen; /* length of symbolic link */ dev_t c_device; /* associated vnode device */ ino_t c_inode; /* associated vnode inode */ struct cnode *c_next; /* links if on NetBSD machine */ }; #define VTOC(vp) ((struct cnode *)(vp)->v_data) #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) /* flags */ #define C_VATTR 0x01 /* Validity of vattr in the cnode */ #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ #define C_WANTED 0x08 /* Set if lock wanted */ #define C_LOCKED 0x10 /* Set if lock held */ #define C_UNMOUNTING 0X20 /* Set if unmounting */ #define C_PURGING 0x40 /* Set if purging a fid */ #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) struct vcomm { u_long vc_seq; struct selinfo vc_selproc; struct queue vc_requests; struct queue vc_replys; }; #define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL) #define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL; #define MARK_VC_OPEN(vcp) /* MT */ struct cfs_clstat { int ncalls; /* client requests */ int nbadcalls; /* upcall failures */ int reqs[CFS_NCALLS]; /* count of each request */ }; extern struct cfs_clstat cfs_clstat; /* * CFS structure to hold mount/file system information */ struct cfs_mntinfo { struct vnode *mi_rootvp; struct mount *mi_vfsp; struct vcomm mi_vcomm; }; extern struct cfs_mntinfo cfs_mnttbl[]; /* indexed by minor device number */ /* * vfs pointer to mount info */ #define vftomi(vfsp) ((struct cfs_mntinfo *)(vfsp->mnt_data)) #define CFS_MOUNTED(vfsp) (vftomi((vfsp)) != (struct cfs_mntinfo *)0) /* * vnode pointer to mount info */ #define vtomi(vp) ((struct cfs_mntinfo *)(vp->v_mount->mnt_data)) /* * Used for identifying usage of "Control" object */ extern struct vnode *cfs_ctlvp; #define IS_CTL_VP(vp) ((vp) == cfs_ctlvp) #define IS_CTL_NAME(vp, name, l)((l == CFS_CONTROLLEN) \ && ((vp) == vtomi((vp))->mi_rootvp) \ && strncmp(name, CFS_CONTROL, l) == 0) /* * An enum to tell us whether something that will remove a reference * to a cnode was a downcall or not */ enum dc_status { IS_DOWNCALL = 6, NOT_DOWNCALL = 7 }; /* cfs_psdev.h */ int cfscall(struct cfs_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer); /* cfs_subr.h */ int handleDownCall(int opcode, union outputArgs *out); void cfs_unmounting(struct mount *whoIam); int cfs_vmflush(struct cnode *cp); /* cfs_vnodeops.h */ struct cnode *makecfsnode(ViceFid *fid, struct mount *vfsp, short type); int cfs_vnodeopstats_init(void); /* cfs_vfsops.h */ struct mount *devtomp(dev_t dev); /* sigh */ #define CFS_RDWR ((u_long) 31) #endif /* _CNODE_H_ */