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