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