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