cnode.h revision 1.5.6.1
1 /* $NetBSD: cnode.h,v 1.5.6.1 1999/08/02 21:50:08 thorpej Exp $ */ 2 3 /* 4 * 5 * Coda: an Experimental Distributed File System 6 * Release 3.1 7 * 8 * Copyright (c) 1987-1998 Carnegie Mellon University 9 * All Rights Reserved 10 * 11 * Permission to use, copy, modify and distribute this software and its 12 * documentation is hereby granted, provided that both the copyright 13 * notice and this permission notice appear in all copies of the 14 * software, derivative works or modified versions, and any portions 15 * thereof, and that both notices appear in supporting documentation, and 16 * that credit is given to Carnegie Mellon University in all documents 17 * and publicity pertaining to direct or indirect use of this code or its 18 * derivatives. 19 * 20 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, 21 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS 22 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON 23 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER 24 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF 25 * ANY DERIVATIVE WORK. 26 * 27 * Carnegie Mellon encourages users of this software to return any 28 * improvements or extensions that they make, and to grant Carnegie 29 * Mellon the rights to redistribute these changes without encumbrance. 30 * 31 * @(#) coda/cnode.h,v 1.1.1.1 1998/08/29 21:26:46 rvb Exp $ 32 */ 33 34 /* 35 * Mach Operating System 36 * Copyright (c) 1990 Carnegie-Mellon University 37 * Copyright (c) 1989 Carnegie-Mellon University 38 * All rights reserved. The CMU software License Agreement specifies 39 * the terms and conditions for use and redistribution. 40 */ 41 42 /* 43 * This code was written for the Coda file system at Carnegie Mellon University. 44 * Contributers include David Steere, James Kistler, and M. Satyanarayanan. 45 */ 46 47 /* 48 * HISTORY 49 * $Log: cnode.h,v $ 50 * Revision 1.5.6.1 1999/08/02 21:50:08 thorpej 51 * Update from trunk. 52 * 53 * Revision 1.6 1999/07/08 01:26:23 wrstuden 54 * Bump osrelease to 1.4E. Add layerfs files, remove null_subr.c. 55 * 56 * Update coda to new struct lock in struct vnode. 57 * 58 * make fdescfs, kernfs, portalfs, and procfs actually lock their vnodes. 59 * It's not that hard. 60 * 61 * Make unionfs set v_vnlock = NULL so any overlayed fs will call its 62 * VOP_LOCK. 63 * 64 * Revision 1.5 1998/11/11 19:22:08 rvb 65 * Lookup now passes up an extra flag. But old veni will 66 * be ok; new veni will check /dev/cfs0 to make sure that a new 67 * kernel is running. 68 * Also, a bug in vc_nb_close iff CODA_SIGNAL's were seen has been 69 * fixed. 70 * 71 * Revision 1.4 1998/09/15 02:02:58 rvb 72 * Final piece of rename cfs->coda 73 * 74 * Revision 1.3 1998/09/12 15:05:50 rvb 75 * Change cfs/CFS in symbols, strings and constants to coda/CODA 76 * to avoid fs conflicts. 77 * 78 * Revision 1.2 1998/09/08 17:12:49 rvb 79 * Pass2 complete 80 * 81 * Revision 1.1.1.1 1998/08/29 21:26:46 rvb 82 * Very Preliminary Coda 83 * 84 * Revision 1.10 1998/08/28 18:12:25 rvb 85 * Now it also works on FreeBSD -current. This code will be 86 * committed to the FreeBSD -current and NetBSD -current 87 * trees. It will then be tailored to the particular platform 88 * by flushing conditional code. 89 * 90 * Revision 1.9 1998/08/18 17:05:24 rvb 91 * Don't use __RCSID now 92 * 93 * Revision 1.8 1998/08/18 16:31:49 rvb 94 * Sync the code for NetBSD -current; test on 1.3 later 95 * 96 * Revision 1.7 98/02/24 22:22:53 rvb 97 * Fixes up mainly to flush iopen and friends 98 * 99 * Revision 1.6 98/01/31 20:53:19 rvb 100 * First version that works on FreeBSD 2.2.5 101 * 102 * Revision 1.5 98/01/23 11:53:51 rvb 103 * Bring RVB_CODA1_1 to HEAD 104 * 105 * Revision 1.4.2.5 98/01/23 11:21:14 rvb 106 * Sync with 2.2.5 107 * 108 * Revision 1.4.2.4 98/01/22 13:03:38 rvb 109 * Had Breaken ls . 110 * 111 * Revision 1.4.2.3 97/12/19 14:26:09 rvb 112 * session id 113 * 114 * Revision 1.4.2.2 97/12/16 12:40:24 rvb 115 * Sync with 1.3 116 * 117 * Revision 1.4.2.1 97/12/06 17:41:28 rvb 118 * Sync with peters coda.h 119 * 120 * Revision 1.4 97/12/05 10:39:30 rvb 121 * Read CHANGES 122 * 123 * Revision 1.3.18.2 97/11/12 12:09:45 rvb 124 * reorg pass1 125 * 126 * Revision 1.3.18.1 97/10/29 16:06:31 rvb 127 * Kill DYING 128 * 129 * Revision 1.3 1996/12/12 22:11:03 bnoble 130 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 131 * There may be more. 132 * 133 * Revision 1.2 1996/01/02 16:57:26 bnoble 134 * Added support for Coda MiniCache and raw inode calls (final commit) 135 * 136 * Revision 1.1.2.1 1995/12/20 01:57:53 bnoble 137 * Added CODA-specific files 138 * 139 * Revision 3.1.1.1 1995/03/04 19:08:23 bnoble 140 * Branch for NetBSD port revisions 141 * 142 * Revision 3.1 1995/03/04 19:08:23 bnoble 143 * Bump to major revision 3 to prepare for NetBSD port 144 * 145 * Revision 2.2 1994/12/06 13:39:18 dcs 146 * Add a flag value to indicate a cnode was orphaned, e.g. the venus 147 * that created it has exited. This will allow one to restart venus 148 * even though some process may be cd'd into /coda. 149 * 150 * Revision 2.1 94/07/21 16:25:33 satya 151 * Conversion to C++ 3.0; start of Coda Release 2.0 152 * 153 * Revision 1.2.7.1 94/06/16 11:26:02 raiff 154 * Branch for release beta-16Jun1994_39118 155 * 156 * Revision 1.2 92/10/27 17:58:41 lily 157 * merge kernel/latest and alpha/src/cfs 158 * 159 * Revision 2.3 92/09/30 14:16:53 mja 160 * Picked up fixed #ifdef _KERNEL. Also... 161 * 162 * Substituted rvb's history blurb so that we agree with Mach 2.5 sources. 163 * [91/02/09 jjk] 164 * 165 * Added contributors blurb. 166 * [90/12/13 jjk] 167 * 168 * Revision 2.2 90/07/05 11:27:24 mrt 169 * Created for the Coda File System. 170 * [90/05/23 dcs] 171 * 172 * Revision 1.4 90/05/31 17:02:16 dcs 173 * Prepare for merge with facilities kernel. 174 * 175 * 176 * 177 */ 178 179 #ifndef _CNODE_H_ 180 #define _CNODE_H_ 181 182 #include <sys/vnode.h> 183 184 /* 185 * tmp below since we need struct queue 186 */ 187 #include <coda/coda_kernel.h> 188 189 /* 190 * Cnode lookup stuff. 191 * NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work! 192 */ 193 #define CODA_CACHESIZE 512 194 195 #define CODA_ALLOC(ptr, cast, size) \ 196 do { \ 197 ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \ 198 if (ptr == 0) { \ 199 panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 200 } \ 201 } while (0) 202 203 #define CODA_FREE(ptr, size) free((ptr), M_CODA) 204 205 /* 206 * global cache state control 207 */ 208 extern int coda_nc_use; 209 210 /* 211 * Used to select debugging statements throughout the cfs code. 212 */ 213 extern int codadebug; 214 extern int coda_nc_debug; 215 extern int coda_printf_delay; 216 extern int coda_vnop_print_entry; 217 extern int coda_psdev_print_entry; 218 extern int coda_vfsop_print_entry; 219 220 #define CODADBGMSK(N) (1 << N) 221 #define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } } 222 #define myprintf(args) \ 223 do { \ 224 if (coda_printf_delay) \ 225 DELAY(coda_printf_delay);\ 226 printf args ; \ 227 } while (0) 228 229 struct cnode { 230 struct vnode *c_vnode; 231 u_short c_flags; /* flags (see below) */ 232 ViceFid c_fid; /* file handle */ 233 struct vnode *c_ovp; /* open vnode pointer */ 234 u_short c_ocount; /* count of openers */ 235 u_short c_owrite; /* count of open for write */ 236 struct vattr c_vattr; /* attributes */ 237 char *c_symlink; /* pointer to symbolic link */ 238 u_short c_symlen; /* length of symbolic link */ 239 dev_t c_device; /* associated vnode device */ 240 ino_t c_inode; /* associated vnode inode */ 241 struct cnode *c_next; /* links if on NetBSD machine */ 242 }; 243 #define VTOC(vp) ((struct cnode *)(vp)->v_data) 244 #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) 245 246 /* flags */ 247 #define C_VATTR 0x01 /* Validity of vattr in the cnode */ 248 #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ 249 #define C_WANTED 0x08 /* Set if lock wanted */ 250 #define C_LOCKED 0x10 /* Set if lock held */ 251 #define C_UNMOUNTING 0X20 /* Set if unmounting */ 252 #define C_PURGING 0x40 /* Set if purging a fid */ 253 254 #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) 255 #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) 256 #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) 257 258 struct vcomm { 259 u_long vc_seq; 260 struct selinfo vc_selproc; 261 struct queue vc_requests; 262 struct queue vc_replys; 263 }; 264 265 #define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL) 266 #define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL; 267 #define MARK_VC_OPEN(vcp) /* MT */ 268 269 struct coda_clstat { 270 int ncalls; /* client requests */ 271 int nbadcalls; /* upcall failures */ 272 int reqs[CODA_NCALLS]; /* count of each request */ 273 }; 274 extern struct coda_clstat coda_clstat; 275 276 /* 277 * CODA structure to hold mount/file system information 278 */ 279 struct coda_mntinfo { 280 struct vnode *mi_rootvp; 281 struct mount *mi_vfsp; 282 struct vcomm mi_vcomm; 283 }; 284 extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */ 285 286 /* 287 * vfs pointer to mount info 288 */ 289 #define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data)) 290 #define CODA_MOUNTED(vfsp) (vftomi((vfsp)) != (struct coda_mntinfo *)0) 291 292 /* 293 * vnode pointer to mount info 294 */ 295 #define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data)) 296 297 /* 298 * Used for identifying usage of "Control" object 299 */ 300 extern struct vnode *coda_ctlvp; 301 #define IS_CTL_VP(vp) ((vp) == coda_ctlvp) 302 #define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \ 303 && ((vp) == vtomi((vp))->mi_rootvp) \ 304 && strncmp(name, CODA_CONTROL, l) == 0) 305 306 /* 307 * An enum to tell us whether something that will remove a reference 308 * to a cnode was a downcall or not 309 */ 310 enum dc_status { 311 IS_DOWNCALL = 6, 312 NOT_DOWNCALL = 7 313 }; 314 315 /* cfs_psdev.h */ 316 extern int coda_call(struct coda_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer); 317 extern int coda_kernel_version; 318 319 /* cfs_subr.h */ 320 extern int handleDownCall(int opcode, union outputArgs *out); 321 extern void coda_unmounting(struct mount *whoIam); 322 extern int coda_vmflush(struct cnode *cp); 323 324 /* cfs_vnodeops.h */ 325 extern struct cnode *make_coda_node(ViceFid *fid, struct mount *vfsp, short type); 326 extern int coda_vnodeopstats_init(void); 327 328 /* coda_vfsops.h */ 329 extern struct mount *devtomp(dev_t dev); 330 331 /* sigh */ 332 #define CODA_RDWR ((u_long) 31) 333 334 #endif /* _CNODE_H_ */ 335 336
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