cnode.h revision 1.5
1 /* $NetBSD: cnode.h,v 1.5 1998/11/11 19:22:08 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 1.5 1998/11/11 19:22:08 rvb 51 * Lookup now passes up an extra flag. But old veni will 52 * be ok; new veni will check /dev/cfs0 to make sure that a new 53 * kernel is running. 54 * Also, a bug in vc_nb_close iff CODA_SIGNAL's were seen has been 55 * fixed. 56 * 57 * Revision 1.4 1998/09/15 02:02:58 rvb 58 * Final piece of rename cfs->coda 59 * 60 * Revision 1.3 1998/09/12 15:05:50 rvb 61 * Change cfs/CFS in symbols, strings and constants to coda/CODA 62 * to avoid fs conflicts. 63 * 64 * Revision 1.2 1998/09/08 17:12:49 rvb 65 * Pass2 complete 66 * 67 * Revision 1.1.1.1 1998/08/29 21:26:46 rvb 68 * Very Preliminary Coda 69 * 70 * Revision 1.10 1998/08/28 18:12:25 rvb 71 * Now it also works on FreeBSD -current. This code will be 72 * committed to the FreeBSD -current and NetBSD -current 73 * trees. It will then be tailored to the particular platform 74 * by flushing conditional code. 75 * 76 * Revision 1.9 1998/08/18 17:05:24 rvb 77 * Don't use __RCSID now 78 * 79 * Revision 1.8 1998/08/18 16:31:49 rvb 80 * Sync the code for NetBSD -current; test on 1.3 later 81 * 82 * Revision 1.7 98/02/24 22:22:53 rvb 83 * Fixes up mainly to flush iopen and friends 84 * 85 * Revision 1.6 98/01/31 20:53:19 rvb 86 * First version that works on FreeBSD 2.2.5 87 * 88 * Revision 1.5 98/01/23 11:53:51 rvb 89 * Bring RVB_CODA1_1 to HEAD 90 * 91 * Revision 1.4.2.5 98/01/23 11:21:14 rvb 92 * Sync with 2.2.5 93 * 94 * Revision 1.4.2.4 98/01/22 13:03:38 rvb 95 * Had Breaken ls . 96 * 97 * Revision 1.4.2.3 97/12/19 14:26:09 rvb 98 * session id 99 * 100 * Revision 1.4.2.2 97/12/16 12:40:24 rvb 101 * Sync with 1.3 102 * 103 * Revision 1.4.2.1 97/12/06 17:41:28 rvb 104 * Sync with peters coda.h 105 * 106 * Revision 1.4 97/12/05 10:39:30 rvb 107 * Read CHANGES 108 * 109 * Revision 1.3.18.2 97/11/12 12:09:45 rvb 110 * reorg pass1 111 * 112 * Revision 1.3.18.1 97/10/29 16:06:31 rvb 113 * Kill DYING 114 * 115 * Revision 1.3 1996/12/12 22:11:03 bnoble 116 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 117 * There may be more. 118 * 119 * Revision 1.2 1996/01/02 16:57:26 bnoble 120 * Added support for Coda MiniCache and raw inode calls (final commit) 121 * 122 * Revision 1.1.2.1 1995/12/20 01:57:53 bnoble 123 * Added CODA-specific files 124 * 125 * Revision 3.1.1.1 1995/03/04 19:08:23 bnoble 126 * Branch for NetBSD port revisions 127 * 128 * Revision 3.1 1995/03/04 19:08:23 bnoble 129 * Bump to major revision 3 to prepare for NetBSD port 130 * 131 * Revision 2.2 1994/12/06 13:39:18 dcs 132 * Add a flag value to indicate a cnode was orphaned, e.g. the venus 133 * that created it has exited. This will allow one to restart venus 134 * even though some process may be cd'd into /coda. 135 * 136 * Revision 2.1 94/07/21 16:25:33 satya 137 * Conversion to C++ 3.0; start of Coda Release 2.0 138 * 139 * Revision 1.2.7.1 94/06/16 11:26:02 raiff 140 * Branch for release beta-16Jun1994_39118 141 * 142 * Revision 1.2 92/10/27 17:58:41 lily 143 * merge kernel/latest and alpha/src/cfs 144 * 145 * Revision 2.3 92/09/30 14:16:53 mja 146 * Picked up fixed #ifdef _KERNEL. Also... 147 * 148 * Substituted rvb's history blurb so that we agree with Mach 2.5 sources. 149 * [91/02/09 jjk] 150 * 151 * Added contributors blurb. 152 * [90/12/13 jjk] 153 * 154 * Revision 2.2 90/07/05 11:27:24 mrt 155 * Created for the Coda File System. 156 * [90/05/23 dcs] 157 * 158 * Revision 1.4 90/05/31 17:02:16 dcs 159 * Prepare for merge with facilities kernel. 160 * 161 * 162 * 163 */ 164 165 #ifndef _CNODE_H_ 166 #define _CNODE_H_ 167 168 #include <sys/vnode.h> 169 170 /* 171 * tmp below since we need struct queue 172 */ 173 #include <coda/coda_kernel.h> 174 175 /* 176 * Cnode lookup stuff. 177 * NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work! 178 */ 179 #define CODA_CACHESIZE 512 180 181 #define CODA_ALLOC(ptr, cast, size) \ 182 do { \ 183 ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \ 184 if (ptr == 0) { \ 185 panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 186 } \ 187 } while (0) 188 189 #define CODA_FREE(ptr, size) free((ptr), M_CODA) 190 191 /* 192 * global cache state control 193 */ 194 extern int coda_nc_use; 195 196 /* 197 * Used to select debugging statements throughout the cfs code. 198 */ 199 extern int codadebug; 200 extern int coda_nc_debug; 201 extern int coda_printf_delay; 202 extern int coda_vnop_print_entry; 203 extern int coda_psdev_print_entry; 204 extern int coda_vfsop_print_entry; 205 206 #define CODADBGMSK(N) (1 << N) 207 #define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } } 208 #define myprintf(args) \ 209 do { \ 210 if (coda_printf_delay) \ 211 DELAY(coda_printf_delay);\ 212 printf args ; \ 213 } while (0) 214 215 struct cnode { 216 struct vnode *c_vnode; 217 u_short c_flags; /* flags (see below) */ 218 ViceFid c_fid; /* file handle */ 219 struct lock c_lock; /* new lock protocol */ 220 struct vnode *c_ovp; /* open vnode pointer */ 221 u_short c_ocount; /* count of openers */ 222 u_short c_owrite; /* count of open for write */ 223 struct vattr c_vattr; /* attributes */ 224 char *c_symlink; /* pointer to symbolic link */ 225 u_short c_symlen; /* length of symbolic link */ 226 dev_t c_device; /* associated vnode device */ 227 ino_t c_inode; /* associated vnode inode */ 228 struct cnode *c_next; /* links if on NetBSD machine */ 229 }; 230 #define VTOC(vp) ((struct cnode *)(vp)->v_data) 231 #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) 232 233 /* flags */ 234 #define C_VATTR 0x01 /* Validity of vattr in the cnode */ 235 #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ 236 #define C_WANTED 0x08 /* Set if lock wanted */ 237 #define C_LOCKED 0x10 /* Set if lock held */ 238 #define C_UNMOUNTING 0X20 /* Set if unmounting */ 239 #define C_PURGING 0x40 /* Set if purging a fid */ 240 241 #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) 242 #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) 243 #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) 244 245 struct vcomm { 246 u_long vc_seq; 247 struct selinfo vc_selproc; 248 struct queue vc_requests; 249 struct queue vc_replys; 250 }; 251 252 #define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL) 253 #define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL; 254 #define MARK_VC_OPEN(vcp) /* MT */ 255 256 struct coda_clstat { 257 int ncalls; /* client requests */ 258 int nbadcalls; /* upcall failures */ 259 int reqs[CODA_NCALLS]; /* count of each request */ 260 }; 261 extern struct coda_clstat coda_clstat; 262 263 /* 264 * CODA structure to hold mount/file system information 265 */ 266 struct coda_mntinfo { 267 struct vnode *mi_rootvp; 268 struct mount *mi_vfsp; 269 struct vcomm mi_vcomm; 270 }; 271 extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */ 272 273 /* 274 * vfs pointer to mount info 275 */ 276 #define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data)) 277 #define CODA_MOUNTED(vfsp) (vftomi((vfsp)) != (struct coda_mntinfo *)0) 278 279 /* 280 * vnode pointer to mount info 281 */ 282 #define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data)) 283 284 /* 285 * Used for identifying usage of "Control" object 286 */ 287 extern struct vnode *coda_ctlvp; 288 #define IS_CTL_VP(vp) ((vp) == coda_ctlvp) 289 #define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \ 290 && ((vp) == vtomi((vp))->mi_rootvp) \ 291 && strncmp(name, CODA_CONTROL, l) == 0) 292 293 /* 294 * An enum to tell us whether something that will remove a reference 295 * to a cnode was a downcall or not 296 */ 297 enum dc_status { 298 IS_DOWNCALL = 6, 299 NOT_DOWNCALL = 7 300 }; 301 302 /* cfs_psdev.h */ 303 extern int coda_call(struct coda_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer); 304 extern int coda_kernel_version; 305 306 /* cfs_subr.h */ 307 extern int handleDownCall(int opcode, union outputArgs *out); 308 extern void coda_unmounting(struct mount *whoIam); 309 extern int coda_vmflush(struct cnode *cp); 310 311 /* cfs_vnodeops.h */ 312 extern struct cnode *make_coda_node(ViceFid *fid, struct mount *vfsp, short type); 313 extern int coda_vnodeopstats_init(void); 314 315 /* coda_vfsops.h */ 316 extern struct mount *devtomp(dev_t dev); 317 318 /* sigh */ 319 #define CODA_RDWR ((u_long) 31) 320 321 #endif /* _CNODE_H_ */ 322 323
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