cnode.h revision 1.1.1.1
1 /* 2 3 Coda: an Experimental Distributed File System 4 Release 3.1 5 6 Copyright (c) 1987-1998 Carnegie Mellon University 7 All Rights Reserved 8 9 Permission to use, copy, modify and distribute this software and its 10 documentation is hereby granted, provided that both the copyright 11 notice and this permission notice appear in all copies of the 12 software, derivative works or modified versions, and any portions 13 thereof, and that both notices appear in supporting documentation, and 14 that credit is given to Carnegie Mellon University in all documents 15 and publicity pertaining to direct or indirect use of this code or its 16 derivatives. 17 18 CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, 19 SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS 20 FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON 21 DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER 22 RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF 23 ANY DERIVATIVE WORK. 24 25 Carnegie Mellon encourages users of this software to return any 26 improvements or extensions that they make, and to grant Carnegie 27 Mellon the rights to redistribute these changes without encumbrance. 28 */ 29 30 /* $Header: /tank/opengrok/rsync2/NetBSD/src/sys/coda/cnode.h,v 1.1.1.1 1998/08/29 21:26:46 rvb Exp $ */ 31 32 /* 33 * Mach Operating System 34 * Copyright (c) 1990 Carnegie-Mellon University 35 * Copyright (c) 1989 Carnegie-Mellon University 36 * All rights reserved. The CMU software License Agreement specifies 37 * the terms and conditions for use and redistribution. 38 */ 39 40 /* 41 * This code was written for the Coda file system at Carnegie Mellon University. 42 * Contributers include David Steere, James Kistler, and M. Satyanarayanan. 43 */ 44 45 /* 46 * HISTORY 47 * $Log: cnode.h,v $ 48 * Revision 1.1.1.1 1998/08/29 21:26:46 rvb 49 * Very Preliminary Coda 50 * 51 * Revision 1.10 1998/08/28 18:12:25 rvb 52 * Now it also works on FreeBSD -current. This code will be 53 * committed to the FreeBSD -current and NetBSD -current 54 * trees. It will then be tailored to the particular platform 55 * by flushing conditional code. 56 * 57 * Revision 1.9 1998/08/18 17:05:24 rvb 58 * Don't use __RCSID now 59 * 60 * Revision 1.8 1998/08/18 16:31:49 rvb 61 * Sync the code for NetBSD -current; test on 1.3 later 62 * 63 * Revision 1.7 98/02/24 22:22:53 rvb 64 * Fixes up mainly to flush iopen and friends 65 * 66 * Revision 1.6 98/01/31 20:53:19 rvb 67 * First version that works on FreeBSD 2.2.5 68 * 69 * Revision 1.5 98/01/23 11:53:51 rvb 70 * Bring RVB_CFS1_1 to HEAD 71 * 72 * Revision 1.4.2.5 98/01/23 11:21:14 rvb 73 * Sync with 2.2.5 74 * 75 * Revision 1.4.2.4 98/01/22 13:03:38 rvb 76 * Had Breaken ls . 77 * 78 * Revision 1.4.2.3 97/12/19 14:26:09 rvb 79 * session id 80 * 81 * Revision 1.4.2.2 97/12/16 12:40:24 rvb 82 * Sync with 1.3 83 * 84 * Revision 1.4.2.1 97/12/06 17:41:28 rvb 85 * Sync with peters coda.h 86 * 87 * Revision 1.4 97/12/05 10:39:30 rvb 88 * Read CHANGES 89 * 90 * Revision 1.3.18.2 97/11/12 12:09:45 rvb 91 * reorg pass1 92 * 93 * Revision 1.3.18.1 97/10/29 16:06:31 rvb 94 * Kill DYING 95 * 96 * Revision 1.3 1996/12/12 22:11:03 bnoble 97 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 98 * There may be more. 99 * 100 * Revision 1.2 1996/01/02 16:57:26 bnoble 101 * Added support for Coda MiniCache and raw inode calls (final commit) 102 * 103 * Revision 1.1.2.1 1995/12/20 01:57:53 bnoble 104 * Added CFS-specific files 105 * 106 * Revision 3.1.1.1 1995/03/04 19:08:23 bnoble 107 * Branch for NetBSD port revisions 108 * 109 * Revision 3.1 1995/03/04 19:08:23 bnoble 110 * Bump to major revision 3 to prepare for NetBSD port 111 * 112 * Revision 2.2 1994/12/06 13:39:18 dcs 113 * Add a flag value to indicate a cnode was orphaned, e.g. the venus 114 * that created it has exited. This will allow one to restart venus 115 * even though some process may be cd'd into /coda. 116 * 117 * Revision 2.1 94/07/21 16:25:33 satya 118 * Conversion to C++ 3.0; start of Coda Release 2.0 119 * 120 * Revision 1.2.7.1 94/06/16 11:26:02 raiff 121 * Branch for release beta-16Jun1994_39118 122 * 123 * Revision 1.2 92/10/27 17:58:41 lily 124 * merge kernel/latest and alpha/src/cfs 125 * 126 * Revision 2.3 92/09/30 14:16:53 mja 127 * Picked up fixed #ifdef _KERNEL. Also... 128 * 129 * Substituted rvb's history blurb so that we agree with Mach 2.5 sources. 130 * [91/02/09 jjk] 131 * 132 * Added contributors blurb. 133 * [90/12/13 jjk] 134 * 135 * Revision 2.2 90/07/05 11:27:24 mrt 136 * Created for the Coda File System. 137 * [90/05/23 dcs] 138 * 139 * Revision 1.4 90/05/31 17:02:16 dcs 140 * Prepare for merge with facilities kernel. 141 * 142 * 143 * 144 */ 145 146 #ifndef _CNODE_H_ 147 #define _CNODE_H_ 148 149 #include <sys/vnode.h> 150 151 #ifdef __FreeBSD__ 152 153 /* for the prototype of DELAY() */ 154 #include <machine/clock.h> 155 156 #ifdef __FreeBSD_version 157 /* You would think that <sys/param.h> or something would include this */ 158 #include <sys/lock.h> 159 160 MALLOC_DECLARE(M_CFS); 161 162 #else 163 164 /* yuck yuck yuck */ 165 #define vref(x) cvref(x) 166 extern void cvref(struct vnode *vp); 167 /* yuck yuck yuck */ 168 169 #endif 170 #endif 171 172 #if defined(__NetBSD__) && defined(NetBSD1_3) && (NetBSD1_3 >= 7) 173 #define NEW_LOCKMGR(l, f, i) lockmgr(l, f, i) 174 #define VOP_X_LOCK(vn, fl) vn_lock(vn, fl) 175 #define VOP_X_UNLOCK(vn, fl) VOP_UNLOCK(vn, fl) 176 177 #elif defined(__FreeBSD_version) 178 #define NEW_LOCKMGR(l, f, i) lockmgr(l, f, i, curproc) 179 #define VOP_X_LOCK(vn, fl) vn_lock(vn, fl, curproc) 180 #define VOP_X_UNLOCK(vn, fl) VOP_UNLOCK(vn, fl, curproc) 181 182 /* NetBSD 1.3 & FreeBSD 2.2.x */ 183 #else 184 #undef NEW_LOCKMGR 185 #define VOP_X_LOCK(vn, fl) VOP_LOCK(vn) 186 #define VOP_X_UNLOCK(vn, fl) VOP_UNLOCK(vn) 187 #endif 188 189 /* 190 * tmp below since we need struct queue 191 */ 192 #include <cfs/cfsk.h> 193 194 /* 195 * Cnode lookup stuff. 196 * NOTE: CFS_CACHESIZE must be a power of 2 for cfshash to work! 197 */ 198 #define CFS_CACHESIZE 512 199 200 #define CFS_ALLOC(ptr, cast, size) \ 201 do { \ 202 ptr = (cast)malloc((unsigned long) size, M_CFS, M_WAITOK); \ 203 if (ptr == 0) { \ 204 panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 205 } \ 206 } while (0) 207 208 #define CFS_FREE(ptr, size) free((ptr), M_CFS) 209 210 /* 211 * global cache state control 212 */ 213 extern int cfsnc_use; 214 215 /* 216 * Used to select debugging statements throughout the cfs code. 217 */ 218 extern int cfsdebug; 219 extern int cfsnc_debug; 220 extern int cfs_printf_delay; 221 extern int cfs_vnop_print_entry; 222 extern int cfs_psdev_print_entry; 223 extern int cfs_vfsop_print_entry; 224 225 #define CFSDBGMSK(N) (1 << N) 226 #define CFSDEBUG(N, STMT) { if (cfsdebug & CFSDBGMSK(N)) { STMT } } 227 #define myprintf(args) \ 228 do { \ 229 if (cfs_printf_delay) \ 230 DELAY(cfs_printf_delay);\ 231 printf args ; \ 232 } while (0) 233 234 struct cnode { 235 struct vnode *c_vnode; 236 u_short c_flags; /* flags (see below) */ 237 ViceFid c_fid; /* file handle */ 238 #ifdef NEW_LOCKMGR 239 struct lock c_lock; /* new lock protocol */ 240 #endif 241 struct vnode *c_ovp; /* open vnode pointer */ 242 u_short c_ocount; /* count of openers */ 243 u_short c_owrite; /* count of open for write */ 244 struct vattr c_vattr; /* attributes */ 245 char *c_symlink; /* pointer to symbolic link */ 246 u_short c_symlen; /* length of symbolic link */ 247 dev_t c_device; /* associated vnode device */ 248 ino_t c_inode; /* associated vnode inode */ 249 struct cnode *c_next; /* links if on NetBSD machine */ 250 }; 251 #define VTOC(vp) ((struct cnode *)(vp)->v_data) 252 #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) 253 254 /* flags */ 255 #define C_VATTR 0x01 /* Validity of vattr in the cnode */ 256 #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ 257 #define C_WANTED 0x08 /* Set if lock wanted */ 258 #define C_LOCKED 0x10 /* Set if lock held */ 259 #define C_UNMOUNTING 0X20 /* Set if unmounting */ 260 #define C_PURGING 0x40 /* Set if purging a fid */ 261 262 #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) 263 #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) 264 #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) 265 266 struct vcomm { 267 u_long vc_seq; 268 struct selinfo vc_selproc; 269 struct queue vc_requests; 270 struct queue vc_replys; 271 }; 272 273 #define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL) 274 #define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL; 275 #define MARK_VC_OPEN(vcp) /* MT */ 276 277 struct cfs_clstat { 278 int ncalls; /* client requests */ 279 int nbadcalls; /* upcall failures */ 280 int reqs[CFS_NCALLS]; /* count of each request */ 281 }; 282 extern struct cfs_clstat cfs_clstat; 283 284 /* 285 * CFS structure to hold mount/file system information 286 */ 287 struct cfs_mntinfo { 288 struct vnode *mi_rootvp; 289 struct mount *mi_vfsp; 290 struct vcomm mi_vcomm; 291 }; 292 extern struct cfs_mntinfo cfs_mnttbl[]; /* indexed by minor device number */ 293 294 /* 295 * vfs pointer to mount info 296 */ 297 #define vftomi(vfsp) ((struct cfs_mntinfo *)(vfsp->mnt_data)) 298 #define CFS_MOUNTED(vfsp) (vftomi((vfsp)) != (struct cfs_mntinfo *)0) 299 300 /* 301 * vnode pointer to mount info 302 */ 303 #define vtomi(vp) ((struct cfs_mntinfo *)(vp->v_mount->mnt_data)) 304 305 /* 306 * Used for identifying usage of "Control" object 307 */ 308 extern struct vnode *cfs_ctlvp; 309 #define IS_CTL_VP(vp) ((vp) == cfs_ctlvp) 310 #define IS_CTL_NAME(vp, name, l)((l == CFS_CONTROLLEN) \ 311 && ((vp) == vtomi((vp))->mi_rootvp) \ 312 && strncmp(name, CFS_CONTROL, l) == 0) 313 314 /* 315 * An enum to tell us whether something that will remove a reference 316 * to a cnode was a downcall or not 317 */ 318 enum dc_status { 319 IS_DOWNCALL = 6, 320 NOT_DOWNCALL = 7 321 }; 322 323 /* cfs_psdev.h */ 324 int cfscall(struct cfs_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer); 325 326 /* cfs_subr.h */ 327 int handleDownCall(int opcode, union outputArgs *out); 328 void cfs_unmounting(struct mount *whoIam); 329 int cfs_vmflush(struct cnode *cp); 330 331 /* cfs_vnodeops.h */ 332 struct cnode *makecfsnode(ViceFid *fid, struct mount *vfsp, short type); 333 int cfs_vnodeopstats_init(void); 334 335 /* cfs_vfsops.h */ 336 struct mount *devtomp(dev_t dev); 337 338 #if !(defined NetBSD1_3) && !defined(__FreeBSD_version) 339 #define __RCSID(x) static char *rcsid = x 340 #endif 341 342 /* sigh */ 343 #define CFS_RDWR ((u_long) 31) 344 345 #endif /* _CNODE_H_ */ 346 347
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