cnode.h revision 1.4
1 /* $NetBSD: cnode.h,v 1.4 1998/09/15 02:02:58 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 * @(#) 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 1.4 1998/09/15 02:02:58 rvb 51 * Final piece of rename cfs->coda 52 * 53 * Revision 1.3 1998/09/12 15:05:50 rvb 54 * Change cfs/CFS in symbols, strings and constants to coda/CODA 55 * to avoid fs conflicts. 56 * 57 * Revision 1.2 1998/09/08 17:12:49 rvb 58 * Pass2 complete 59 * 60 * Revision 1.1.1.1 1998/08/29 21:26:46 rvb 61 * Very Preliminary Coda 62 * 63 * Revision 1.10 1998/08/28 18:12:25 rvb 64 * Now it also works on FreeBSD -current. This code will be 65 * committed to the FreeBSD -current and NetBSD -current 66 * trees. It will then be tailored to the particular platform 67 * by flushing conditional code. 68 * 69 * Revision 1.9 1998/08/18 17:05:24 rvb 70 * Don't use __RCSID now 71 * 72 * Revision 1.8 1998/08/18 16:31:49 rvb 73 * Sync the code for NetBSD -current; test on 1.3 later 74 * 75 * Revision 1.7 98/02/24 22:22:53 rvb 76 * Fixes up mainly to flush iopen and friends 77 * 78 * Revision 1.6 98/01/31 20:53:19 rvb 79 * First version that works on FreeBSD 2.2.5 80 * 81 * Revision 1.5 98/01/23 11:53:51 rvb 82 * Bring RVB_CODA1_1 to HEAD 83 * 84 * Revision 1.4.2.5 98/01/23 11:21:14 rvb 85 * Sync with 2.2.5 86 * 87 * Revision 1.4.2.4 98/01/22 13:03:38 rvb 88 * Had Breaken ls . 89 * 90 * Revision 1.4.2.3 97/12/19 14:26:09 rvb 91 * session id 92 * 93 * Revision 1.4.2.2 97/12/16 12:40:24 rvb 94 * Sync with 1.3 95 * 96 * Revision 1.4.2.1 97/12/06 17:41:28 rvb 97 * Sync with peters coda.h 98 * 99 * Revision 1.4 97/12/05 10:39:30 rvb 100 * Read CHANGES 101 * 102 * Revision 1.3.18.2 97/11/12 12:09:45 rvb 103 * reorg pass1 104 * 105 * Revision 1.3.18.1 97/10/29 16:06:31 rvb 106 * Kill DYING 107 * 108 * Revision 1.3 1996/12/12 22:11:03 bnoble 109 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 110 * There may be more. 111 * 112 * Revision 1.2 1996/01/02 16:57:26 bnoble 113 * Added support for Coda MiniCache and raw inode calls (final commit) 114 * 115 * Revision 1.1.2.1 1995/12/20 01:57:53 bnoble 116 * Added CODA-specific files 117 * 118 * Revision 3.1.1.1 1995/03/04 19:08:23 bnoble 119 * Branch for NetBSD port revisions 120 * 121 * Revision 3.1 1995/03/04 19:08:23 bnoble 122 * Bump to major revision 3 to prepare for NetBSD port 123 * 124 * Revision 2.2 1994/12/06 13:39:18 dcs 125 * Add a flag value to indicate a cnode was orphaned, e.g. the venus 126 * that created it has exited. This will allow one to restart venus 127 * even though some process may be cd'd into /coda. 128 * 129 * Revision 2.1 94/07/21 16:25:33 satya 130 * Conversion to C++ 3.0; start of Coda Release 2.0 131 * 132 * Revision 1.2.7.1 94/06/16 11:26:02 raiff 133 * Branch for release beta-16Jun1994_39118 134 * 135 * Revision 1.2 92/10/27 17:58:41 lily 136 * merge kernel/latest and alpha/src/cfs 137 * 138 * Revision 2.3 92/09/30 14:16:53 mja 139 * Picked up fixed #ifdef _KERNEL. Also... 140 * 141 * Substituted rvb's history blurb so that we agree with Mach 2.5 sources. 142 * [91/02/09 jjk] 143 * 144 * Added contributors blurb. 145 * [90/12/13 jjk] 146 * 147 * Revision 2.2 90/07/05 11:27:24 mrt 148 * Created for the Coda File System. 149 * [90/05/23 dcs] 150 * 151 * Revision 1.4 90/05/31 17:02:16 dcs 152 * Prepare for merge with facilities kernel. 153 * 154 * 155 * 156 */ 157 158 #ifndef _CNODE_H_ 159 #define _CNODE_H_ 160 161 #include <sys/vnode.h> 162 163 /* 164 * tmp below since we need struct queue 165 */ 166 #include <coda/coda_kernel.h> 167 168 /* 169 * Cnode lookup stuff. 170 * NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work! 171 */ 172 #define CODA_CACHESIZE 512 173 174 #define CODA_ALLOC(ptr, cast, size) \ 175 do { \ 176 ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \ 177 if (ptr == 0) { \ 178 panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 179 } \ 180 } while (0) 181 182 #define CODA_FREE(ptr, size) free((ptr), M_CODA) 183 184 /* 185 * global cache state control 186 */ 187 extern int coda_nc_use; 188 189 /* 190 * Used to select debugging statements throughout the cfs code. 191 */ 192 extern int codadebug; 193 extern int coda_nc_debug; 194 extern int coda_printf_delay; 195 extern int coda_vnop_print_entry; 196 extern int coda_psdev_print_entry; 197 extern int coda_vfsop_print_entry; 198 199 #define CODADBGMSK(N) (1 << N) 200 #define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } } 201 #define myprintf(args) \ 202 do { \ 203 if (coda_printf_delay) \ 204 DELAY(coda_printf_delay);\ 205 printf args ; \ 206 } while (0) 207 208 struct cnode { 209 struct vnode *c_vnode; 210 u_short c_flags; /* flags (see below) */ 211 ViceFid c_fid; /* file handle */ 212 struct lock c_lock; /* new lock protocol */ 213 struct vnode *c_ovp; /* open vnode pointer */ 214 u_short c_ocount; /* count of openers */ 215 u_short c_owrite; /* count of open for write */ 216 struct vattr c_vattr; /* attributes */ 217 char *c_symlink; /* pointer to symbolic link */ 218 u_short c_symlen; /* length of symbolic link */ 219 dev_t c_device; /* associated vnode device */ 220 ino_t c_inode; /* associated vnode inode */ 221 struct cnode *c_next; /* links if on NetBSD machine */ 222 }; 223 #define VTOC(vp) ((struct cnode *)(vp)->v_data) 224 #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) 225 226 /* flags */ 227 #define C_VATTR 0x01 /* Validity of vattr in the cnode */ 228 #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ 229 #define C_WANTED 0x08 /* Set if lock wanted */ 230 #define C_LOCKED 0x10 /* Set if lock held */ 231 #define C_UNMOUNTING 0X20 /* Set if unmounting */ 232 #define C_PURGING 0x40 /* Set if purging a fid */ 233 234 #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) 235 #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) 236 #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) 237 238 struct vcomm { 239 u_long vc_seq; 240 struct selinfo vc_selproc; 241 struct queue vc_requests; 242 struct queue vc_replys; 243 }; 244 245 #define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL) 246 #define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL; 247 #define MARK_VC_OPEN(vcp) /* MT */ 248 249 struct coda_clstat { 250 int ncalls; /* client requests */ 251 int nbadcalls; /* upcall failures */ 252 int reqs[CODA_NCALLS]; /* count of each request */ 253 }; 254 extern struct coda_clstat coda_clstat; 255 256 /* 257 * CODA structure to hold mount/file system information 258 */ 259 struct coda_mntinfo { 260 struct vnode *mi_rootvp; 261 struct mount *mi_vfsp; 262 struct vcomm mi_vcomm; 263 }; 264 extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */ 265 266 /* 267 * vfs pointer to mount info 268 */ 269 #define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data)) 270 #define CODA_MOUNTED(vfsp) (vftomi((vfsp)) != (struct coda_mntinfo *)0) 271 272 /* 273 * vnode pointer to mount info 274 */ 275 #define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data)) 276 277 /* 278 * Used for identifying usage of "Control" object 279 */ 280 extern struct vnode *coda_ctlvp; 281 #define IS_CTL_VP(vp) ((vp) == coda_ctlvp) 282 #define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \ 283 && ((vp) == vtomi((vp))->mi_rootvp) \ 284 && strncmp(name, CODA_CONTROL, l) == 0) 285 286 /* 287 * An enum to tell us whether something that will remove a reference 288 * to a cnode was a downcall or not 289 */ 290 enum dc_status { 291 IS_DOWNCALL = 6, 292 NOT_DOWNCALL = 7 293 }; 294 295 /* cfs_psdev.h */ 296 int coda_call(struct coda_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer); 297 298 /* cfs_subr.h */ 299 int handleDownCall(int opcode, union outputArgs *out); 300 void coda_unmounting(struct mount *whoIam); 301 int coda_vmflush(struct cnode *cp); 302 303 /* cfs_vnodeops.h */ 304 struct cnode *make_coda_node(ViceFid *fid, struct mount *vfsp, short type); 305 int coda_vnodeopstats_init(void); 306 307 /* coda_vfsops.h */ 308 struct mount *devtomp(dev_t dev); 309 310 /* sigh */ 311 #define CODA_RDWR ((u_long) 31) 312 313 #endif /* _CNODE_H_ */ 314 315
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