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Diffstat (limited to 'sys/cfs/cfsnc.h')
| -rw-r--r-- | sys/cfs/cfsnc.h | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/sys/cfs/cfsnc.h b/sys/cfs/cfsnc.h deleted file mode 100644 index 86063652d42c..000000000000 --- a/sys/cfs/cfsnc.h +++ /dev/null @@ -1,281 +0,0 @@ -/* - * - * 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/cfsnc.h,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ - * $Id: cfsnc.h,v 1.2 1998/09/02 19:09:53 rvb Exp $ - * - */ - -/* - * 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: cfsnc.h,v $ - * Revision 1.2 1998/09/02 19:09:53 rvb - * Pass2 complete - * - * Revision 1.1.1.1 1998/08/29 21:14:52 rvb - * Very Preliminary Coda - * - * Revision 1.8 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 1.7 1998/08/18 17:05:24 rvb - * Don't use __RCSID now - * - * Revision 1.6 1998/08/18 16:31:49 rvb - * Sync the code for NetBSD -current; test on 1.3 later - * - * Revision 1.5 98/01/23 11:53:51 rvb - * Bring RVB_CODA1_1 to HEAD - * - * Revision 1.4.2.1 97/12/16 12:40:23 rvb - * Sync with 1.3 - * - * Revision 1.4 97/12/05 10:39:29 rvb - * Read CHANGES - * - * Revision 1.3.4.3 97/11/24 15:44:51 rvb - * Final cfs_venus.c w/o macros, but one locking bug - * - * Revision 1.3.4.2 97/11/12 12:09:44 rvb - * reorg pass1 - * - * Revision 1.3.4.1 97/11/06 21:06:05 rvb - * don't include headers in headers - * - * Revision 1.3 97/08/05 11:08:19 lily - * Removed cfsnc_replace, replaced it with a coda_find, unhash, and - * rehash. This fixes a cnode leak and a bug in which the fid is - * not actually replaced. (cfs_namecache.c, cfsnc.h, cfs_subr.c) - * - * Revision 1.2 96/01/02 16:57:19 bnoble - * Added support for Coda MiniCache and raw inode calls (final commit) - * - * Revision 1.1.2.1 1995/12/20 01:57:45 bnoble - * Added CODA-specific files - * - * Revision 3.1.1.1 1995/03/04 19:08:22 bnoble - * Branch for NetBSD port revisions - * - * Revision 3.1 1995/03/04 19:08:21 bnoble - * Bump to major revision 3 to prepare for NetBSD port - * - * Revision 2.2 1994/08/28 19:37:39 luqi - * Add a new CODA_REPLACE call to allow venus to replace a ViceFid in the - * mini-cache. - * - * In "cfs.h": - * Add CODA_REPLACE decl. - * - * In "cfs_namecache.c": - * Add routine cfsnc_replace. - * - * In "cfs_subr.c": - * Add case-statement to process CODA_REPLACE. - * - * In "cfsnc.h": - * Add decl for CODA_NC_REPLACE. - * - * Revision 2.1 94/07/21 16:25:27 satya - * Conversion to C++ 3.0; start of Coda Release 2.0 - * - * Revision 1.2 92/10/27 17:58:34 lily - * merge kernel/latest and alpha/src/cfs - * - * Revision 2.2 90/07/05 11:27:04 mrt - * Created for the Coda File System. - * [90/05/23 dcs] - * - * Revision 1.4 90/05/31 17:02:12 dcs - * Prepare for merge with facilities kernel. - * - * - */ -#ifndef _CODA_NC_HEADER_ -#define _CODA_NC_HEADER_ - -/* - * Coda constants - */ -#define CODA_NC_NAMELEN 15 /* longest name stored in cache */ -#define CODA_NC_CACHESIZE 256 /* Default cache size */ -#define CODA_NC_HASHSIZE 64 /* Must be multiple of 2 */ - -/* - * Hash function for the primary hash. - */ - -/* - * First try -- (first + last letters + length + (int)cp) mod size - * 2nd try -- same, except dir fid.vnode instead of cp - */ - -#ifdef oldhash -#define CODA_NC_HASH(name, namelen, cp) \ - ((name[0] + name[namelen-1] + namelen + (int)(cp)) & (coda_nc_hashsize-1)) -#else -#define CODA_NC_HASH(name, namelen, cp) \ - ((name[0] + (name[namelen-1]<<4) + namelen + (((int)cp)>>8)) & (coda_nc_hashsize-1)) -#endif - -#define CODA_NAMEMATCH(cp, name, namelen, dcp) \ - ((namelen == cp->namelen) && (dcp == cp->dcp) && \ - (bcmp(cp->name,name,namelen) == 0)) - -/* - * Functions to modify the hash and lru chains. - * insque and remque assume that the pointers are the first thing - * in the list node, thus the trickery for lru. - */ - -#define CODA_NC_HSHINS(elem, pred) insque(elem,pred) -#define CODA_NC_HSHREM(elem) remque(elem) -#define CODA_NC_HSHNUL(elem) (elem)->hash_next = \ - (elem)->hash_prev = (elem) - -#define CODA_NC_LRUINS(elem, pred) insque(LRU_PART(elem), LRU_PART(pred)) -#define CODA_NC_LRUREM(elem) remque(LRU_PART(elem)); -#define CODA_NC_LRUGET(lruhead) LRU_TOP((lruhead).lru_prev) - -#define CODA_NC_VALID(cncp) (cncp->dcp != (struct cnode *)0) - -#define LRU_PART(cncp) (struct coda_cache *) \ - ((char *)cncp + (2*sizeof(struct coda_cache *))) -#define LRU_TOP(cncp) (struct coda_cache *) \ - ((char *)cncp - (2*sizeof(struct coda_cache *))) -#define DATA_PART(cncp) (struct coda_cache *) \ - ((char *)cncp + (4*sizeof(struct coda_cache *))) -#define DATA_SIZE (sizeof(struct coda_cache)-(4*sizeof(struct coda_cache *))) - -/* - * Structure for an element in the CODA Name Cache. - * NOTE: I use the position of arguments and their size in the - * implementation of the functions CODA_NC_LRUINS, CODA_NC_LRUREM, and - * DATA_PART. - */ - -struct coda_cache { - struct coda_cache *hash_next,*hash_prev; /* Hash list */ - struct coda_cache *lru_next, *lru_prev; /* LRU list */ - struct cnode *cp; /* vnode of the file */ - struct cnode *dcp; /* parent's cnode */ - struct ucred *cred; /* user credentials */ - char name[CODA_NC_NAMELEN]; /* segment name */ - int namelen; /* length of name */ -}; - -struct coda_lru { /* Start of LRU chain */ - char *dummy1, *dummy2; /* place holders */ - struct coda_cache *lru_next, *lru_prev; /* position of pointers is important */ -}; - - -struct coda_hash { /* Start of Hash chain */ - struct coda_cache *hash_next, *hash_prev; /* NOTE: chain pointers must be first */ - int length; /* used for tuning purposes */ -}; - - -/* - * Symbols to aid in debugging the namecache code. Assumes the existence - * of the variable coda_nc_debug, which is defined in cfs_namecache.c - */ -#define CODA_NC_DEBUG(N, STMT) { if (coda_nc_debug & (1 <<N)) { STMT } } - -/* Prototypes of functions exported within cfs */ -extern void coda_nc_init(void); -extern void coda_nc_enter(struct cnode *, const char *, int, struct ucred *, struct cnode *); -extern struct cnode *coda_nc_lookup(struct cnode *, const char *, int, struct ucred *); - -extern void coda_nc_zapParentfid(ViceFid *, enum dc_status); -extern void coda_nc_zapfid(ViceFid *, enum dc_status); -extern void coda_nc_zapvnode(ViceFid *, struct ucred *, enum dc_status); -extern void coda_nc_zapfile(struct cnode *, const char *, int); -extern void coda_nc_purge_user(vuid_t, enum dc_status); -extern void coda_nc_flush(enum dc_status); - -extern void print_coda_nc(void); -extern void coda_nc_gather_stats(void); -extern int coda_nc_resize(int, int, enum dc_status); -extern void coda_nc_name(struct cnode *cp); - -/* - * Structure to contain statistics on the cache usage - */ - -struct coda_nc_statistics { - unsigned hits; - unsigned misses; - unsigned enters; - unsigned dbl_enters; - unsigned long_name_enters; - unsigned long_name_lookups; - unsigned long_remove; - unsigned lru_rm; - unsigned zapPfids; - unsigned zapFids; - unsigned zapFile; - unsigned zapUsers; - unsigned Flushes; - unsigned Sum_bucket_len; - unsigned Sum2_bucket_len; - unsigned Max_bucket_len; - unsigned Num_zero_len; - unsigned Search_len; -}; - -#define CODA_NC_FIND ((u_long) 1) -#define CODA_NC_REMOVE ((u_long) 2) -#define CODA_NC_INIT ((u_long) 3) -#define CODA_NC_ENTER ((u_long) 4) -#define CODA_NC_LOOKUP ((u_long) 5) -#define CODA_NC_ZAPPFID ((u_long) 6) -#define CODA_NC_ZAPFID ((u_long) 7) -#define CODA_NC_ZAPVNODE ((u_long) 8) -#define CODA_NC_ZAPFILE ((u_long) 9) -#define CODA_NC_PURGEUSER ((u_long) 10) -#define CODA_NC_FLUSH ((u_long) 11) -#define CODA_NC_PRINTCODA_NC ((u_long) 12) -#define CODA_NC_PRINTSTATS ((u_long) 13) - -#endif |