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