cnode.h revision 1.3
1 /* $NetBSD: cnode.h,v 1.3 1998/09/12 15:05:50 rvb 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 * @(#) cfs/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 1.3 1998/09/12 15:05:50 rvb 51 * Change cfs/CFS in symbols, strings and constants to coda/CODA 52 * to avoid fs conflicts. 53 * 54 * Revision 1.2 1998/09/08 17:12:49 rvb 55 * Pass2 complete 56 * 57 * Revision 1.1.1.1 1998/08/29 21:26:46 rvb 58 * Very Preliminary Coda 59 * 60 * Revision 1.10 1998/08/28 18:12:25 rvb 61 * Now it also works on FreeBSD -current. This code will be 62 * committed to the FreeBSD -current and NetBSD -current 63 * trees. It will then be tailored to the particular platform 64 * by flushing conditional code. 65 * 66 * Revision 1.9 1998/08/18 17:05:24 rvb 67 * Don't use __RCSID now 68 * 69 * Revision 1.8 1998/08/18 16:31:49 rvb 70 * Sync the code for NetBSD -current; test on 1.3 later 71 * 72 * Revision 1.7 98/02/24 22:22:53 rvb 73 * Fixes up mainly to flush iopen and friends 74 * 75 * Revision 1.6 98/01/31 20:53:19 rvb 76 * First version that works on FreeBSD 2.2.5 77 * 78 * Revision 1.5 98/01/23 11:53:51 rvb 79 * Bring RVB_CODA1_1 to HEAD 80 * 81 * Revision 1.4.2.5 98/01/23 11:21:14 rvb 82 * Sync with 2.2.5 83 * 84 * Revision 1.4.2.4 98/01/22 13:03:38 rvb 85 * Had Breaken ls . 86 * 87 * Revision 1.4.2.3 97/12/19 14:26:09 rvb 88 * session id 89 * 90 * Revision 1.4.2.2 97/12/16 12:40:24 rvb 91 * Sync with 1.3 92 * 93 * Revision 1.4.2.1 97/12/06 17:41:28 rvb 94 * Sync with peters coda.h 95 * 96 * Revision 1.4 97/12/05 10:39:30 rvb 97 * Read CHANGES 98 * 99 * Revision 1.3.18.2 97/11/12 12:09:45 rvb 100 * reorg pass1 101 * 102 * Revision 1.3.18.1 97/10/29 16:06:31 rvb 103 * Kill DYING 104 * 105 * Revision 1.3 1996/12/12 22:11:03 bnoble 106 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 107 * There may be more. 108 * 109 * Revision 1.2 1996/01/02 16:57:26 bnoble 110 * Added support for Coda MiniCache and raw inode calls (final commit) 111 * 112 * Revision 1.1.2.1 1995/12/20 01:57:53 bnoble 113 * Added CODA-specific files 114 * 115 * Revision 3.1.1.1 1995/03/04 19:08:23 bnoble 116 * Branch for NetBSD port revisions 117 * 118 * Revision 3.1 1995/03/04 19:08:23 bnoble 119 * Bump to major revision 3 to prepare for NetBSD port 120 * 121 * Revision 2.2 1994/12/06 13:39:18 dcs 122 * Add a flag value to indicate a cnode was orphaned, e.g. the venus 123 * that created it has exited. This will allow one to restart venus 124 * even though some process may be cd'd into /coda. 125 * 126 * Revision 2.1 94/07/21 16:25:33 satya 127 * Conversion to C++ 3.0; start of Coda Release 2.0 128 * 129 * Revision 1.2.7.1 94/06/16 11:26:02 raiff 130 * Branch for release beta-16Jun1994_39118 131 * 132 * Revision 1.2 92/10/27 17:58:41 lily 133 * merge kernel/latest and alpha/src/cfs 134 * 135 * Revision 2.3 92/09/30 14:16:53 mja 136 * Picked up fixed #ifdef _KERNEL. Also... 137 * 138 * Substituted rvb's history blurb so that we agree with Mach 2.5 sources. 139 * [91/02/09 jjk] 140 * 141 * Added contributors blurb. 142 * [90/12/13 jjk] 143 * 144 * Revision 2.2 90/07/05 11:27:24 mrt 145 * Created for the Coda File System. 146 * [90/05/23 dcs] 147 * 148 * Revision 1.4 90/05/31 17:02:16 dcs 149 * Prepare for merge with facilities kernel. 150 * 151 * 152 * 153 */ 154 155 #ifndef _CNODE_H_ 156 #define _CNODE_H_ 157 158 #include <sys/vnode.h> 159 160 /* 161 * tmp below since we need struct queue 162 */ 163 #include <cfs/cfsk.h> 164 165 /* 166 * Cnode lookup stuff. 167 * NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work! 168 */ 169 #define CODA_CACHESIZE 512 170 171 #define CODA_ALLOC(ptr, cast, size) \ 172 do { \ 173 ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \ 174 if (ptr == 0) { \ 175 panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 176 } \ 177 } while (0) 178 179 #define CODA_FREE(ptr, size) free((ptr), M_CODA) 180 181 /* 182 * global cache state control 183 */ 184 extern int coda_nc_use; 185 186 /* 187 * Used to select debugging statements throughout the cfs code. 188 */ 189 extern int codadebug; 190 extern int coda_nc_debug; 191 extern int coda_printf_delay; 192 extern int coda_vnop_print_entry; 193 extern int coda_psdev_print_entry; 194 extern int coda_vfsop_print_entry; 195 196 #define CODADBGMSK(N) (1 << N) 197 #define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } } 198 #define myprintf(args) \ 199 do { \ 200 if (coda_printf_delay) \ 201 DELAY(coda_printf_delay);\ 202 printf args ; \ 203 } while (0) 204 205 struct cnode { 206 struct vnode *c_vnode; 207 u_short c_flags; /* flags (see below) */ 208 ViceFid c_fid; /* file handle */ 209 struct lock c_lock; /* new lock protocol */ 210 struct vnode *c_ovp; /* open vnode pointer */ 211 u_short c_ocount; /* count of openers */ 212 u_short c_owrite; /* count of open for write */ 213 struct vattr c_vattr; /* attributes */ 214 char *c_symlink; /* pointer to symbolic link */ 215 u_short c_symlen; /* length of symbolic link */ 216 dev_t c_device; /* associated vnode device */ 217 ino_t c_inode; /* associated vnode inode */ 218 struct cnode *c_next; /* links if on NetBSD machine */ 219 }; 220 #define VTOC(vp) ((struct cnode *)(vp)->v_data) 221 #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) 222 223 /* flags */ 224 #define C_VATTR 0x01 /* Validity of vattr in the cnode */ 225 #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ 226 #define C_WANTED 0x08 /* Set if lock wanted */ 227 #define C_LOCKED 0x10 /* Set if lock held */ 228 #define C_UNMOUNTING 0X20 /* Set if unmounting */ 229 #define C_PURGING 0x40 /* Set if purging a fid */ 230 231 #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) 232 #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) 233 #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) 234 235 struct vcomm { 236 u_long vc_seq; 237 struct selinfo vc_selproc; 238 struct queue vc_requests; 239 struct queue vc_replys; 240 }; 241 242 #define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL) 243 #define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL; 244 #define MARK_VC_OPEN(vcp) /* MT */ 245 246 struct coda_clstat { 247 int ncalls; /* client requests */ 248 int nbadcalls; /* upcall failures */ 249 int reqs[CODA_NCALLS]; /* count of each request */ 250 }; 251 extern struct coda_clstat coda_clstat; 252 253 /* 254 * CODA structure to hold mount/file system information 255 */ 256 struct coda_mntinfo { 257 struct vnode *mi_rootvp; 258 struct mount *mi_vfsp; 259 struct vcomm mi_vcomm; 260 }; 261 extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */ 262 263 /* 264 * vfs pointer to mount info 265 */ 266 #define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data)) 267 #define CODA_MOUNTED(vfsp) (vftomi((vfsp)) != (struct coda_mntinfo *)0) 268 269 /* 270 * vnode pointer to mount info 271 */ 272 #define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data)) 273 274 /* 275 * Used for identifying usage of "Control" object 276 */ 277 extern struct vnode *coda_ctlvp; 278 #define IS_CTL_VP(vp) ((vp) == coda_ctlvp) 279 #define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \ 280 && ((vp) == vtomi((vp))->mi_rootvp) \ 281 && strncmp(name, CODA_CONTROL, l) == 0) 282 283 /* 284 * An enum to tell us whether something that will remove a reference 285 * to a cnode was a downcall or not 286 */ 287 enum dc_status { 288 IS_DOWNCALL = 6, 289 NOT_DOWNCALL = 7 290 }; 291 292 /* cfs_psdev.h */ 293 int coda_call(struct coda_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer); 294 295 /* cfs_subr.h */ 296 int handleDownCall(int opcode, union outputArgs *out); 297 void coda_unmounting(struct mount *whoIam); 298 int coda_vmflush(struct cnode *cp); 299 300 /* cfs_vnodeops.h */ 301 struct cnode *make_coda_node(ViceFid *fid, struct mount *vfsp, short type); 302 int coda_vnodeopstats_init(void); 303 304 /* coda_vfsops.h */ 305 struct mount *devtomp(dev_t dev); 306 307 /* sigh */ 308 #define CODA_RDWR ((u_long) 31) 309 310 #endif /* _CNODE_H_ */ 311 312
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