coda_vfsops.c revision 1.7
1 /* $NetBSD: coda_vfsops.c,v 1.7 1999/02/26 23:44:44 wrstuden 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/coda_vfsops.c,v 1.1.1.1 1998/08/29 21:26:45 rvb Exp $ 32 */ 33 34 /* 35 * Mach Operating System 36 * Copyright (c) 1989 Carnegie-Mellon University 37 * All rights reserved. The CMU software License Agreement specifies 38 * the terms and conditions for use and redistribution. 39 */ 40 41 /* 42 * This code was written for the Coda file system at Carnegie Mellon 43 * University. Contributers include David Steere, James Kistler, and 44 * M. Satyanarayanan. 45 */ 46 47 /* 48 * HISTORY 49 * $Log: coda_vfsops.c,v $ 50 * Revision 1.7 1999/02/26 23:44:44 wrstuden 51 * Modify vfsops to seperate vfs_fhtovp() into two routines. vfs_fhtovp() now 52 * only handles the file handle to vnode conversion, and a new call, 53 * vfs_checkexp(), performs the export verification. 54 * 55 * Revision 1.6 1998/12/10 02:22:52 rvb 56 * Commit a couple of old fixes 57 * 58 * Revision 1.5 1998/09/25 15:01:13 rvb 59 * Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG. 60 * Make files compile if DEBUG is on (from Alan Barrett). Finally, 61 * make coda an lkm. 62 * 63 * Revision 1.4 1998/09/15 02:03:00 rvb 64 * Final piece of rename cfs->coda 65 * 66 * Revision 1.3 1998/09/12 15:05:49 rvb 67 * Change cfs/CFS in symbols, strings and constants to coda/CODA 68 * to avoid fs conflicts. 69 * 70 * Revision 1.2 1998/09/08 17:12:47 rvb 71 * Pass2 complete 72 * 73 * Revision 1.1.1.1 1998/08/29 21:26:45 rvb 74 * Very Preliminary Coda 75 * 76 * Revision 1.11 1998/08/28 18:12:22 rvb 77 * Now it also works on FreeBSD -current. This code will be 78 * committed to the FreeBSD -current and NetBSD -current 79 * trees. It will then be tailored to the particular platform 80 * by flushing conditional code. 81 * 82 * Revision 1.10 1998/08/18 17:05:19 rvb 83 * Don't use __RCSID now 84 * 85 * Revision 1.9 1998/08/18 16:31:44 rvb 86 * Sync the code for NetBSD -current; test on 1.3 later 87 * 88 * Revision 1.8 98/02/24 22:22:48 rvb 89 * Fixes up mainly to flush iopen and friends 90 * 91 * Revision 1.7 98/01/23 11:53:45 rvb 92 * Bring RVB_CODA1_1 to HEAD 93 * 94 * Revision 1.6.2.6 98/01/23 11:21:07 rvb 95 * Sync with 2.2.5 96 * 97 * Revision 1.6.2.5 98/01/22 13:05:33 rvb 98 * Move make_coda_node ctlfid later so vfsp is known 99 * 100 * Revision 1.6.2.4 97/12/19 14:26:05 rvb 101 * session id 102 * 103 * Revision 1.6.2.3 97/12/16 12:40:11 rvb 104 * Sync with 1.3 105 * 106 * Revision 1.6.2.2 97/12/10 11:40:25 rvb 107 * No more ody 108 * 109 * Revision 1.6.2.1 97/12/06 17:41:24 rvb 110 * Sync with peters coda.h 111 * 112 * Revision 1.6 97/12/05 10:39:21 rvb 113 * Read CHANGES 114 * 115 * Revision 1.5.14.8 97/11/24 15:44:46 rvb 116 * Final cfs_venus.c w/o macros, but one locking bug 117 * 118 * Revision 1.5.14.7 97/11/21 13:22:03 rvb 119 * Catch a few coda_calls in coda_vfsops.c 120 * 121 * Revision 1.5.14.6 97/11/20 11:46:48 rvb 122 * Capture current cfs_venus 123 * 124 * Revision 1.5.14.5 97/11/18 10:27:17 rvb 125 * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c 126 * cfs_nb_foo and cfs_foo are joined 127 * 128 * Revision 1.5.14.4 97/11/13 22:03:01 rvb 129 * pass2 cfs_NetBSD.h mt 130 * 131 * Revision 1.5.14.3 97/11/12 12:09:40 rvb 132 * reorg pass1 133 * 134 * Revision 1.5.14.2 97/10/29 16:06:28 rvb 135 * Kill DYING 136 * 137 * Revision 1.5.14.1 1997/10/28 23:10:17 rvb 138 * >64Meg; venus can be killed! 139 * 140 * Revision 1.5 1997/01/13 17:11:07 bnoble 141 * Coda statfs needs to return something other than -1 for blocks avail. and 142 * files available for wabi (and other windowsish) programs to install 143 * there correctly. 144 * 145 * Revision 1.4 1996/12/12 22:11:00 bnoble 146 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 147 * There may be more 148 * 149 * Revision 1.3 1996/11/08 18:06:12 bnoble 150 * Minor changes in vnode operation signature, VOP_UPDATE signature, and 151 * some newly defined bits in the include files. 152 * 153 * Revision 1.2 1996/01/02 16:57:04 bnoble 154 * Added support for Coda MiniCache and raw inode calls (final commit) 155 * 156 * Revision 1.1.2.1 1995/12/20 01:57:32 bnoble 157 * Added CODA-specific files 158 * 159 * Revision 3.1.1.1 1995/03/04 19:08:02 bnoble 160 * Branch for NetBSD port revisions 161 * 162 * Revision 3.1 1995/03/04 19:08:01 bnoble 163 * Bump to major revision 3 to prepare for NetBSD port 164 * 165 * Revision 2.4 1995/02/17 16:25:22 dcs 166 * These versions represent several changes: 167 * 1. Allow venus to restart even if outstanding references exist. 168 * 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d 169 * 3. Allow ody_expand to return many members, not just one. 170 * 171 * Revision 2.3 94/10/14 09:58:21 dcs 172 * Made changes 'cause sun4s have braindead compilers 173 * 174 * Revision 2.2 94/10/12 16:46:33 dcs 175 * Cleaned kernel/venus interface by removing XDR junk, plus 176 * so cleanup to allow this code to be more easily ported. 177 * 178 * Revision 1.3 93/05/28 16:24:29 bnoble 179 * *** empty log message *** 180 * 181 * Revision 1.2 92/10/27 17:58:24 lily 182 * merge kernel/latest and alpha/src/cfs 183 * 184 * Revision 2.3 92/09/30 14:16:32 mja 185 * Added call to coda_flush to coda_unmount. 186 * [90/12/15 dcs] 187 * 188 * Added contributors blurb. 189 * [90/12/13 jjk] 190 * 191 * Revision 2.2 90/07/05 11:26:40 mrt 192 * Created for the Coda File System. 193 * [90/05/23 dcs] 194 * 195 * Revision 1.3 90/05/31 17:01:42 dcs 196 * Prepare for merge with facilities kernel. 197 * 198 * 199 */ 200 201 #ifdef _LKM 202 #define NVCODA 4 203 #else 204 #include <vcoda.h> 205 #endif 206 207 #include <sys/param.h> 208 #include <sys/systm.h> 209 #include <sys/malloc.h> 210 #include <sys/conf.h> 211 #include <sys/namei.h> 212 #include <sys/mount.h> 213 #include <sys/proc.h> 214 #include <sys/select.h> 215 216 #include <coda/coda.h> 217 #include <coda/cnode.h> 218 #include <coda/coda_vfsops.h> 219 #include <coda/coda_venus.h> 220 #include <coda/coda_subr.h> 221 #include <coda/coda_opstats.h> 222 /* for VN_RDEV */ 223 #include <miscfs/specfs/specdev.h> 224 225 int codadebug = 0; 226 227 int coda_vfsop_print_entry = 0; 228 #define ENTRY if(coda_vfsop_print_entry) myprintf(("Entered %s\n",__FUNCTION__)) 229 230 struct vnode *coda_ctlvp; 231 struct coda_mntinfo coda_mnttbl[NVCODA]; /* indexed by minor device number */ 232 233 /* structure to keep statistics of internally generated/satisfied calls */ 234 235 struct coda_op_stats coda_vfsopstats[CODA_VFSOPS_SIZE]; 236 237 #define MARK_ENTRY(op) (coda_vfsopstats[op].entries++) 238 #define MARK_INT_SAT(op) (coda_vfsopstats[op].sat_intrn++) 239 #define MARK_INT_FAIL(op) (coda_vfsopstats[op].unsat_intrn++) 240 #define MRAK_INT_GEN(op) (coda_vfsopstats[op].gen_intrn++) 241 242 extern int coda_nc_initialized; /* Set if cache has been initialized */ 243 extern int vc_nb_open __P((dev_t, int, int, struct proc *)); 244 extern struct cdevsw cdevsw[]; /* For sanity check in coda_mount */ 245 extern struct vnodeopv_desc coda_vnodeop_opv_desc; 246 247 struct vnodeopv_desc *coda_vnodeopv_descs[] = { 248 &coda_vnodeop_opv_desc, 249 NULL, 250 }; 251 252 struct vfsops coda_vfsops = { 253 MOUNT_CODA, 254 coda_mount, 255 coda_start, 256 coda_unmount, 257 coda_root, 258 coda_quotactl, 259 coda_nb_statfs, 260 coda_sync, 261 coda_vget, 262 (int (*) (struct mount *, struct fid *, struct vnode ** )) 263 eopnotsupp, 264 (int (*) (struct vnode *, struct fid *)) eopnotsupp, 265 coda_init, 266 coda_sysctl, 267 (int (*)(void)) eopnotsupp, 268 (int (*)(struct mount *, struct mbuf *, int *, struct ucred **)) 269 eopnotsupp, 270 coda_vnodeopv_descs, 271 0 272 }; 273 274 int 275 coda_vfsopstats_init(void) 276 { 277 register int i; 278 279 for (i=0;i<CODA_VFSOPS_SIZE;i++) { 280 coda_vfsopstats[i].opcode = i; 281 coda_vfsopstats[i].entries = 0; 282 coda_vfsopstats[i].sat_intrn = 0; 283 coda_vfsopstats[i].unsat_intrn = 0; 284 coda_vfsopstats[i].gen_intrn = 0; 285 } 286 287 return 0; 288 } 289 290 /* 291 * cfs mount vfsop 292 * Set up mount info record and attach it to vfs struct. 293 */ 294 /*ARGSUSED*/ 295 int 296 coda_mount(vfsp, path, data, ndp, p) 297 struct mount *vfsp; /* Allocated and initialized by mount(2) */ 298 const char *path; /* path covered: ignored by the fs-layer */ 299 void *data; /* Need to define a data type for this in netbsd? */ 300 struct nameidata *ndp; /* Clobber this to lookup the device name */ 301 struct proc *p; /* The ever-famous proc pointer */ 302 { 303 struct vnode *dvp; 304 struct cnode *cp; 305 dev_t dev; 306 struct coda_mntinfo *mi; 307 struct vnode *rootvp; 308 ViceFid rootfid; 309 ViceFid ctlfid; 310 int error; 311 312 ENTRY; 313 314 coda_vfsopstats_init(); 315 coda_vnodeopstats_init(); 316 317 MARK_ENTRY(CODA_MOUNT_STATS); 318 if (CODA_MOUNTED(vfsp)) { 319 MARK_INT_FAIL(CODA_MOUNT_STATS); 320 return(EBUSY); 321 } 322 323 /* Validate mount device. Similar to getmdev(). */ 324 325 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, data, p); 326 error = namei(ndp); 327 dvp = ndp->ni_vp; 328 329 if (error) { 330 MARK_INT_FAIL(CODA_MOUNT_STATS); 331 return (error); 332 } 333 if (dvp->v_type != VCHR) { 334 MARK_INT_FAIL(CODA_MOUNT_STATS); 335 vrele(dvp); 336 return(ENXIO); 337 } 338 dev = dvp->v_specinfo->si_rdev; 339 vrele(dvp); 340 if (major(dev) >= nchrdev || major(dev) < 0) { 341 MARK_INT_FAIL(CODA_MOUNT_STATS); 342 return(ENXIO); 343 } 344 345 /* 346 * See if the device table matches our expectations. 347 */ 348 if (cdevsw[major(dev)].d_open != vc_nb_open) 349 { 350 MARK_INT_FAIL(CODA_MOUNT_STATS); 351 return(ENXIO); 352 } 353 354 if (minor(dev) >= NVCODA || minor(dev) < 0) { 355 MARK_INT_FAIL(CODA_MOUNT_STATS); 356 return(ENXIO); 357 } 358 359 /* 360 * Initialize the mount record and link it to the vfs struct 361 */ 362 mi = &coda_mnttbl[minor(dev)]; 363 364 if (!VC_OPEN(&mi->mi_vcomm)) { 365 MARK_INT_FAIL(CODA_MOUNT_STATS); 366 return(ENODEV); 367 } 368 369 /* No initialization (here) of mi_vcomm! */ 370 vfsp->mnt_data = (qaddr_t)mi; 371 vfsp->mnt_stat.f_fsid.val[0] = 0; 372 vfsp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_CODA); 373 mi->mi_vfsp = vfsp; 374 375 /* 376 * Make a root vnode to placate the Vnode interface, but don't 377 * actually make the CODA_ROOT call to venus until the first call 378 * to coda_root in case a server is down while venus is starting. 379 */ 380 rootfid.Volume = 0; 381 rootfid.Vnode = 0; 382 rootfid.Unique = 0; 383 cp = make_coda_node(&rootfid, vfsp, VDIR); 384 rootvp = CTOV(cp); 385 rootvp->v_flag |= VROOT; 386 387 ctlfid.Volume = CTL_VOL; 388 ctlfid.Vnode = CTL_VNO; 389 ctlfid.Unique = CTL_UNI; 390 /* cp = make_coda_node(&ctlfid, vfsp, VCHR); 391 The above code seems to cause a loop in the cnode links. 392 I don't totally understand when it happens, it is caught 393 when closing down the system. 394 */ 395 cp = make_coda_node(&ctlfid, 0, VCHR); 396 397 coda_ctlvp = CTOV(cp); 398 399 /* Add vfs and rootvp to chain of vfs hanging off mntinfo */ 400 mi->mi_vfsp = vfsp; 401 mi->mi_rootvp = rootvp; 402 403 /* set filesystem block size */ 404 vfsp->mnt_stat.f_bsize = 8192; /* XXX -JJK */ 405 406 /* error is currently guaranteed to be zero, but in case some 407 code changes... */ 408 CODADEBUG(1, 409 myprintf(("coda_mount returned %d\n",error));); 410 if (error) 411 MARK_INT_FAIL(CODA_MOUNT_STATS); 412 else 413 MARK_INT_SAT(CODA_MOUNT_STATS); 414 415 return(error); 416 } 417 418 int 419 coda_start(vfsp, flags, p) 420 struct mount *vfsp; 421 int flags; 422 struct proc *p; 423 { 424 ENTRY; 425 return (0); 426 } 427 428 int 429 coda_unmount(vfsp, mntflags, p) 430 struct mount *vfsp; 431 int mntflags; 432 struct proc *p; 433 { 434 struct coda_mntinfo *mi = vftomi(vfsp); 435 int active, error = 0; 436 437 ENTRY; 438 MARK_ENTRY(CODA_UMOUNT_STATS); 439 if (!CODA_MOUNTED(vfsp)) { 440 MARK_INT_FAIL(CODA_UMOUNT_STATS); 441 return(EINVAL); 442 } 443 444 if (mi->mi_vfsp == vfsp) { /* We found the victim */ 445 if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp))) 446 return (EBUSY); /* Venus is still running */ 447 448 #ifdef DEBUG 449 printf("coda_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp)); 450 #endif 451 vrele(mi->mi_rootvp); 452 453 active = coda_kill(vfsp, NOT_DOWNCALL); 454 mi->mi_rootvp->v_flag &= ~VROOT; 455 error = vflush(mi->mi_vfsp, NULLVP, FORCECLOSE); 456 printf("coda_unmount: active = %d, vflush active %d\n", active, error); 457 error = 0; 458 459 /* I'm going to take this out to allow lookups to go through. I'm 460 * not sure it's important anyway. -- DCS 2/2/94 461 */ 462 /* vfsp->VFS_DATA = NULL; */ 463 464 /* No more vfsp's to hold onto */ 465 mi->mi_vfsp = NULL; 466 mi->mi_rootvp = NULL; 467 468 if (error) 469 MARK_INT_FAIL(CODA_UMOUNT_STATS); 470 else 471 MARK_INT_SAT(CODA_UMOUNT_STATS); 472 473 return(error); 474 } 475 return (EINVAL); 476 } 477 478 /* 479 * find root of cfs 480 */ 481 int 482 coda_root(vfsp, vpp) 483 struct mount *vfsp; 484 struct vnode **vpp; 485 { 486 struct coda_mntinfo *mi = vftomi(vfsp); 487 struct vnode **result; 488 int error; 489 struct proc *p = curproc; /* XXX - bnoble */ 490 ViceFid VFid; 491 492 ENTRY; 493 MARK_ENTRY(CODA_ROOT_STATS); 494 result = NULL; 495 496 if (vfsp == mi->mi_vfsp) { 497 if ((VTOC(mi->mi_rootvp)->c_fid.Volume != 0) || 498 (VTOC(mi->mi_rootvp)->c_fid.Vnode != 0) || 499 (VTOC(mi->mi_rootvp)->c_fid.Unique != 0)) 500 { /* Found valid root. */ 501 *vpp = mi->mi_rootvp; 502 /* On Mach, this is vref. On NetBSD, VOP_LOCK */ 503 vref(*vpp); 504 vn_lock(*vpp, LK_EXCLUSIVE); 505 MARK_INT_SAT(CODA_ROOT_STATS); 506 return(0); 507 } 508 } 509 510 error = venus_root(vftomi(vfsp), p->p_cred->pc_ucred, p, &VFid); 511 512 if (!error) { 513 /* 514 * Save the new rootfid in the cnode, and rehash the cnode into the 515 * cnode hash with the new fid key. 516 */ 517 coda_unsave(VTOC(mi->mi_rootvp)); 518 VTOC(mi->mi_rootvp)->c_fid = VFid; 519 coda_save(VTOC(mi->mi_rootvp)); 520 521 *vpp = mi->mi_rootvp; 522 vref(*vpp); 523 vn_lock(*vpp, LK_EXCLUSIVE); 524 MARK_INT_SAT(CODA_ROOT_STATS); 525 goto exit; 526 } else if (error == ENODEV || error == EINTR) { 527 /* Gross hack here! */ 528 /* 529 * If Venus fails to respond to the CODA_ROOT call, coda_call returns 530 * ENODEV. Return the uninitialized root vnode to allow vfs 531 * operations such as unmount to continue. Without this hack, 532 * there is no way to do an unmount if Venus dies before a 533 * successful CODA_ROOT call is done. All vnode operations 534 * will fail. 535 */ 536 *vpp = mi->mi_rootvp; 537 vref(*vpp); 538 vn_lock(*vpp, LK_EXCLUSIVE); 539 MARK_INT_FAIL(CODA_ROOT_STATS); 540 error = 0; 541 goto exit; 542 } else { 543 CODADEBUG( CODA_ROOT, myprintf(("error %d in CODA_ROOT\n", error)); ); 544 MARK_INT_FAIL(CODA_ROOT_STATS); 545 546 goto exit; 547 } 548 exit: 549 return(error); 550 } 551 552 int 553 coda_quotactl(vfsp, cmd, uid, arg, p) 554 struct mount *vfsp; 555 int cmd; 556 uid_t uid; 557 caddr_t arg; 558 struct proc *p; 559 { 560 ENTRY; 561 return (EOPNOTSUPP); 562 } 563 564 /* 565 * Get file system statistics. 566 */ 567 int 568 coda_nb_statfs(vfsp, sbp, p) 569 register struct mount *vfsp; 570 struct statfs *sbp; 571 struct proc *p; 572 { 573 ENTRY; 574 /* MARK_ENTRY(CODA_STATFS_STATS); */ 575 if (!CODA_MOUNTED(vfsp)) { 576 /* MARK_INT_FAIL(CODA_STATFS_STATS);*/ 577 return(EINVAL); 578 } 579 580 bzero(sbp, sizeof(struct statfs)); 581 /* XXX - what to do about f_flags, others? --bnoble */ 582 /* Below This is what AFS does 583 #define NB_SFS_SIZ 0x895440 584 */ 585 /* Note: Normal fs's have a bsize of 0x400 == 1024 */ 586 sbp->f_type = 0; 587 sbp->f_bsize = 8192; /* XXX */ 588 sbp->f_iosize = 8192; /* XXX */ 589 #define NB_SFS_SIZ 0x8AB75D 590 sbp->f_blocks = NB_SFS_SIZ; 591 sbp->f_bfree = NB_SFS_SIZ; 592 sbp->f_bavail = NB_SFS_SIZ; 593 sbp->f_files = NB_SFS_SIZ; 594 sbp->f_ffree = NB_SFS_SIZ; 595 bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t)); 596 strncpy(sbp->f_fstypename, MOUNT_CODA, MFSNAMELEN-1); 597 strcpy(sbp->f_mntonname, "/coda"); 598 strcpy(sbp->f_mntfromname, "CODA"); 599 /* MARK_INT_SAT(CODA_STATFS_STATS); */ 600 return(0); 601 } 602 603 /* 604 * Flush any pending I/O. 605 */ 606 int 607 coda_sync(vfsp, waitfor, cred, p) 608 struct mount *vfsp; 609 int waitfor; 610 struct ucred *cred; 611 struct proc *p; 612 { 613 ENTRY; 614 MARK_ENTRY(CODA_SYNC_STATS); 615 MARK_INT_SAT(CODA_SYNC_STATS); 616 return(0); 617 } 618 619 int 620 coda_vget(vfsp, ino, vpp) 621 struct mount *vfsp; 622 ino_t ino; 623 struct vnode **vpp; 624 { 625 ENTRY; 626 return (EOPNOTSUPP); 627 } 628 629 /* 630 * fhtovp is now what vget used to be in 4.3-derived systems. For 631 * some silly reason, vget is now keyed by a 32 bit ino_t, rather than 632 * a type-specific fid. 633 */ 634 int 635 coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp) 636 register struct mount *vfsp; 637 struct fid *fhp; 638 struct mbuf *nam; 639 struct vnode **vpp; 640 int *exflagsp; 641 struct ucred **creadanonp; 642 { 643 struct cfid *cfid = (struct cfid *)fhp; 644 struct cnode *cp = 0; 645 int error; 646 struct proc *p = curproc; /* XXX -mach */ 647 ViceFid VFid; 648 int vtype; 649 650 ENTRY; 651 652 MARK_ENTRY(CODA_VGET_STATS); 653 /* Check for vget of control object. */ 654 if (IS_CTL_FID(&cfid->cfid_fid)) { 655 *vpp = coda_ctlvp; 656 vref(coda_ctlvp); 657 MARK_INT_SAT(CODA_VGET_STATS); 658 return(0); 659 } 660 661 error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_cred->pc_ucred, p, &VFid, &vtype); 662 663 if (error) { 664 CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));) 665 *vpp = (struct vnode *)0; 666 } else { 667 CODADEBUG(CODA_VGET, 668 myprintf(("vget: vol %lx vno %lx uni %lx type %d result %d\n", 669 VFid.Volume, VFid.Vnode, VFid.Unique, vtype, error)); ) 670 671 cp = make_coda_node(&VFid, vfsp, vtype); 672 *vpp = CTOV(cp); 673 } 674 return(error); 675 } 676 677 int 678 coda_vptofh(vnp, fidp) 679 struct vnode *vnp; 680 struct fid *fidp; 681 { 682 ENTRY; 683 return (EOPNOTSUPP); 684 } 685 686 void 687 coda_init(void) 688 { 689 ENTRY; 690 } 691 692 int 693 coda_sysctl(name, namelen, oldp, oldlp, newp, newl, p) 694 int *name; 695 u_int namelen; 696 void *oldp; 697 size_t *oldlp; 698 void *newp; 699 size_t newl; 700 struct proc *p; 701 { 702 703 /* all sysctl names at this level are terminal */ 704 if (namelen != 1) 705 return (ENOTDIR); /* overloaded */ 706 707 switch (name[0]) { 708 /* 709 case FFS_CLUSTERREAD: 710 return (sysctl_int(oldp, oldlp, newp, newl, &doclusterread)); 711 */ 712 default: 713 return (EOPNOTSUPP); 714 } 715 /* NOTREACHED */ 716 } 717 718 /* 719 * To allow for greater ease of use, some vnodes may be orphaned when 720 * Venus dies. Certain operations should still be allowed to go 721 * through, but without propagating ophan-ness. So this function will 722 * get a new vnode for the file from the current run of Venus. */ 723 724 int 725 getNewVnode(vpp) 726 struct vnode **vpp; 727 { 728 struct cfid cfid; 729 struct coda_mntinfo *mi = vftomi((*vpp)->v_mount); 730 731 ENTRY; 732 733 cfid.cfid_len = (short)sizeof(ViceFid); 734 cfid.cfid_fid = VTOC(*vpp)->c_fid; /* Structure assignment. */ 735 /* XXX ? */ 736 737 /* We're guessing that if set, the 1st element on the list is a 738 * valid vnode to use. If not, return ENODEV as venus is dead. 739 */ 740 if (mi->mi_vfsp == NULL) 741 return ENODEV; 742 743 return coda_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp, 744 NULL, NULL); 745 } 746 747 #include <ufs/ufs/quota.h> 748 #include <ufs/ufs/ufsmount.h> 749 /* get the mount structure corresponding to a given device. Assume 750 * device corresponds to a UFS. Return NULL if no device is found. 751 */ 752 struct mount *devtomp(dev) 753 dev_t dev; 754 { 755 struct mount *mp, *nmp; 756 757 for (mp = mountlist.cqh_first; mp != (void*)&mountlist; mp = nmp) { 758 nmp = mp->mnt_list.cqe_next; 759 if ((!strcmp(mp->mnt_op->vfs_name, MOUNT_UFS)) && 760 ((VFSTOUFS(mp))->um_dev == (dev_t) dev)) { 761 /* mount corresponds to UFS and the device matches one we want */ 762 return(mp); 763 } 764 } 765 /* mount structure wasn't found */ 766 return(NULL); 767 } 768
Indexes created Fri Sep 26 20:09:58 GMT 2025