coda_subr.c revision 1.7
1 /* $NetBSD: coda_subr.c,v 1.7 1999/10/01 22:25:59 soren 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 * @(#) coda/coda_subr.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 * HISTORY 48 * $Log: coda_subr.c,v $ 49 * Revision 1.7 1999/10/01 22:25:59 soren 50 * Account for widened v_usecount in struct vnode. 51 * 52 * Revision 1.6 1998/10/28 19:54:50 rvb 53 * Venus must be passed O_CREAT flag on VOP_OPEN iff this is 54 * a creat so that we can will allow a mode 444 file to be 55 * written into. Sync with the latest coda.h and deal with 56 * collateral damage. 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 02:02:59 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 18:12:18 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 17:05:16 rvb 83 * Don't use __RCSID now 84 * 85 * Revision 1.9 1998/08/18 16:31:41 rvb 86 * Sync the code for NetBSD -current; test on 1.3 later 87 * 88 * Revision 1.8 98/01/31 20:53:12 rvb 89 * First version that works on FreeBSD 2.2.5 90 * 91 * Revision 1.7 98/01/23 11:53:42 rvb 92 * Bring RVB_CODA1_1 to HEAD 93 * 94 * Revision 1.6.2.3 98/01/23 11:21:05 rvb 95 * Sync with 2.2.5 96 * 97 * Revision 1.6.2.2 97/12/16 12:40:06 rvb 98 * Sync with 1.3 99 * 100 * Revision 1.6.2.1 97/12/06 17:41:21 rvb 101 * Sync with peters coda.h 102 * 103 * Revision 1.6 97/12/05 10:39:17 rvb 104 * Read CHANGES 105 * 106 * Revision 1.5.4.8 97/11/26 15:28:58 rvb 107 * Cant make downcall pbuf == union cfs_downcalls yet 108 * 109 * Revision 1.5.4.7 97/11/20 11:46:42 rvb 110 * Capture current cfs_venus 111 * 112 * Revision 1.5.4.6 97/11/18 10:27:16 rvb 113 * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c 114 * cfs_nb_foo and cfs_foo are joined 115 * 116 * Revision 1.5.4.5 97/11/13 22:03:00 rvb 117 * pass2 cfs_NetBSD.h mt 118 * 119 * Revision 1.5.4.4 97/11/12 12:09:39 rvb 120 * reorg pass1 121 * 122 * Revision 1.5.4.3 97/11/06 21:02:38 rvb 123 * first pass at ^c ^z 124 * 125 * Revision 1.5.4.2 97/10/29 16:06:27 rvb 126 * Kill DYING 127 * 128 * Revision 1.5.4.1 97/10/28 23:10:16 rvb 129 * >64Meg; venus can be killed! 130 * 131 * Revision 1.5 97/08/05 11:08:17 lily 132 * Removed cfsnc_replace, replaced it with a coda_find, unhash, and 133 * rehash. This fixes a cnode leak and a bug in which the fid is 134 * not actually replaced. (cfs_namecache.c, cfsnc.h, cfs_subr.c) 135 * 136 * Revision 1.4 96/12/12 22:10:59 bnoble 137 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 138 * There may be more 139 * 140 * Revision 1.3 1996/12/05 16:20:15 bnoble 141 * Minor debugging aids 142 * 143 * Revision 1.2 1996/01/02 16:57:01 bnoble 144 * Added support for Coda MiniCache and raw inode calls (final commit) 145 * 146 * Revision 1.1.2.1 1995/12/20 01:57:27 bnoble 147 * Added CODA-specific files 148 * 149 * Revision 3.1.1.1 1995/03/04 19:07:59 bnoble 150 * Branch for NetBSD port revisions 151 * 152 * Revision 3.1 1995/03/04 19:07:58 bnoble 153 * Bump to major revision 3 to prepare for NetBSD port 154 * 155 * Revision 2.8 1995/03/03 17:00:04 dcs 156 * Fixed kernel bug involving sleep and upcalls. Basically if you killed 157 * a job waiting on venus, the venus upcall queues got trashed. Depending 158 * on luck, you could kill the kernel or not. 159 * (mods to cfs_subr.c and cfs_mach.d) 160 * 161 * Revision 2.7 95/03/02 22:45:21 dcs 162 * Sun4 compatibility 163 * 164 * Revision 2.6 95/02/17 16:25:17 dcs 165 * These versions represent several changes: 166 * 1. Allow venus to restart even if outstanding references exist. 167 * 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d 168 * 3. Allow ody_expand to return many members, not just one. 169 * 170 * Revision 2.5 94/11/09 15:56:26 dcs 171 * Had the thread sleeping on the wrong thing! 172 * 173 * Revision 2.4 94/10/14 09:57:57 dcs 174 * Made changes 'cause sun4s have braindead compilers 175 * 176 * Revision 2.3 94/10/12 16:46:26 dcs 177 * Cleaned kernel/venus interface by removing XDR junk, plus 178 * so cleanup to allow this code to be more easily ported. 179 * 180 * Revision 1.2 92/10/27 17:58:22 lily 181 * merge kernel/latest and alpha/src/cfs 182 * 183 * Revision 2.4 92/09/30 14:16:26 mja 184 * Incorporated Dave Steere's fix for the GNU-Emacs bug. 185 * Also, included his coda_flush routine in place of the former coda_nc_flush. 186 * [91/02/07 jjk] 187 * 188 * Added contributors blurb. 189 * [90/12/13 jjk] 190 * 191 * Hack to allow users to keep coda venus calls uninterruptible. THis 192 * basically prevents the Gnu-emacs bug from appearing, in which a call 193 * was being interrupted, and return EINTR, but gnu didn't check for the 194 * error and figured the file was buggered. 195 * [90/12/09 dcs] 196 * 197 * Revision 2.3 90/08/10 10:23:20 mrt 198 * Removed include of vm/vm_page.h as it no longer exists. 199 * [90/08/10 mrt] 200 * 201 * Revision 2.2 90/07/05 11:26:35 mrt 202 * Initialize name cache on first call to vcopen. 203 * [90/05/23 dcs] 204 * 205 * Created for the Coda File System. 206 * [90/05/23 dcs] 207 * 208 * Revision 1.5 90/05/31 17:01:35 dcs 209 * Prepare for merge with facilities kernel. 210 * 211 * Revision 1.2 90/03/19 15:56:25 dcs 212 * Initialize name cache on first call to vcopen. 213 * 214 * Revision 1.1 90/03/15 10:43:26 jjk 215 * Initial revision 216 * 217 */ 218 219 /* NOTES: rvb 220 * 1. Added coda_unmounting to mark all cnodes as being UNMOUNTING. This has to 221 * be done before dounmount is called. Because some of the routines that 222 * dounmount calls before coda_unmounted might try to force flushes to venus. 223 * The vnode pager does this. 224 * 2. coda_unmounting marks all cnodes scanning coda_cache. 225 * 3. cfs_checkunmounting (under DEBUG) checks all cnodes by chasing the vnodes 226 * under the /coda mount point. 227 * 4. coda_cacheprint (under DEBUG) prints names with vnode/cnode address 228 */ 229 230 #ifdef _LKM 231 #define NVCODA 4 232 #else 233 #include <vcoda.h> 234 #endif 235 236 #include <sys/param.h> 237 #include <sys/systm.h> 238 #include <sys/malloc.h> 239 #include <sys/proc.h> 240 #include <sys/select.h> 241 #include <sys/mount.h> 242 243 #include <coda/coda.h> 244 #include <coda/cnode.h> 245 #include <coda/coda_subr.h> 246 #include <coda/coda_namecache.h> 247 248 int coda_active = 0; 249 int coda_reuse = 0; 250 int coda_new = 0; 251 252 struct cnode *coda_freelist = NULL; 253 struct cnode *coda_cache[CODA_CACHESIZE]; 254 255 #define coda_hash(fid) \ 256 (((fid)->Volume + (fid)->Vnode) & (CODA_CACHESIZE-1)) 257 258 #define CNODE_NEXT(cp) ((cp)->c_next) 259 260 #define ODD(vnode) ((vnode) & 0x1) 261 262 /* 263 * Allocate a cnode. 264 */ 265 struct cnode * 266 coda_alloc(void) 267 { 268 struct cnode *cp; 269 270 if (coda_freelist) { 271 cp = coda_freelist; 272 coda_freelist = CNODE_NEXT(cp); 273 coda_reuse++; 274 } 275 else { 276 CODA_ALLOC(cp, struct cnode *, sizeof(struct cnode)); 277 /* NetBSD vnodes don't have any Pager info in them ('cause there are 278 no external pagers, duh!) */ 279 #define VNODE_VM_INFO_INIT(vp) /* MT */ 280 VNODE_VM_INFO_INIT(CTOV(cp)); 281 coda_new++; 282 } 283 bzero(cp, sizeof (struct cnode)); 284 285 return(cp); 286 } 287 288 /* 289 * Deallocate a cnode. 290 */ 291 void 292 coda_free(cp) 293 register struct cnode *cp; 294 { 295 296 CNODE_NEXT(cp) = coda_freelist; 297 coda_freelist = cp; 298 } 299 300 /* 301 * Put a cnode in the hash table 302 */ 303 void 304 coda_save(cp) 305 struct cnode *cp; 306 { 307 CNODE_NEXT(cp) = coda_cache[coda_hash(&cp->c_fid)]; 308 coda_cache[coda_hash(&cp->c_fid)] = cp; 309 } 310 311 /* 312 * Remove a cnode from the hash table 313 */ 314 void 315 coda_unsave(cp) 316 struct cnode *cp; 317 { 318 struct cnode *ptr; 319 struct cnode *ptrprev = NULL; 320 321 ptr = coda_cache[coda_hash(&cp->c_fid)]; 322 while (ptr != NULL) { 323 if (ptr == cp) { 324 if (ptrprev == NULL) { 325 coda_cache[coda_hash(&cp->c_fid)] 326 = CNODE_NEXT(ptr); 327 } else { 328 CNODE_NEXT(ptrprev) = CNODE_NEXT(ptr); 329 } 330 CNODE_NEXT(cp) = (struct cnode *)NULL; 331 332 return; 333 } 334 ptrprev = ptr; 335 ptr = CNODE_NEXT(ptr); 336 } 337 } 338 339 /* 340 * Lookup a cnode by fid. If the cnode is dying, it is bogus so skip it. 341 * NOTE: this allows multiple cnodes with same fid -- dcs 1/25/95 342 */ 343 struct cnode * 344 coda_find(fid) 345 ViceFid *fid; 346 { 347 struct cnode *cp; 348 349 cp = coda_cache[coda_hash(fid)]; 350 while (cp) { 351 if ((cp->c_fid.Vnode == fid->Vnode) && 352 (cp->c_fid.Volume == fid->Volume) && 353 (cp->c_fid.Unique == fid->Unique) && 354 (!IS_UNMOUNTING(cp))) 355 { 356 coda_active++; 357 return(cp); 358 } 359 cp = CNODE_NEXT(cp); 360 } 361 return(NULL); 362 } 363 364 /* 365 * coda_kill is called as a side effect to vcopen. To prevent any 366 * cnodes left around from an earlier run of a venus or warden from 367 * causing problems with the new instance, mark any outstanding cnodes 368 * as dying. Future operations on these cnodes should fail (excepting 369 * coda_inactive of course!). Since multiple venii/wardens can be 370 * running, only kill the cnodes for a particular entry in the 371 * coda_mnttbl. -- DCS 12/1/94 */ 372 373 int 374 coda_kill(whoIam, dcstat) 375 struct mount *whoIam; 376 enum dc_status dcstat; 377 { 378 int hash, count = 0; 379 struct cnode *cp; 380 381 /* 382 * Algorithm is as follows: 383 * Second, flush whatever vnodes we can from the name cache. 384 * 385 * Finally, step through whatever is left and mark them dying. 386 * This prevents any operation at all. 387 388 */ 389 390 /* This is slightly overkill, but should work. Eventually it'd be 391 * nice to only flush those entries from the namecache that 392 * reference a vnode in this vfs. */ 393 coda_nc_flush(dcstat); 394 395 for (hash = 0; hash < CODA_CACHESIZE; hash++) { 396 for (cp = coda_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) { 397 if (CTOV(cp)->v_mount == whoIam) { 398 #ifdef DEBUG 399 printf("coda_kill: vp %p, cp %p\n", CTOV(cp), cp); 400 #endif 401 count++; 402 CODADEBUG(CODA_FLUSH, 403 myprintf(("Live cnode fid %lx.%lx.%lx flags %d count %ld\n", 404 (cp->c_fid).Volume, 405 (cp->c_fid).Vnode, 406 (cp->c_fid).Unique, 407 cp->c_flags, 408 CTOV(cp)->v_usecount)); ); 409 } 410 } 411 } 412 return count; 413 } 414 415 /* 416 * There are two reasons why a cnode may be in use, it may be in the 417 * name cache or it may be executing. 418 */ 419 void 420 coda_flush(dcstat) 421 enum dc_status dcstat; 422 { 423 int hash; 424 struct cnode *cp; 425 426 coda_clstat.ncalls++; 427 coda_clstat.reqs[CODA_FLUSH]++; 428 429 coda_nc_flush(dcstat); /* flush files from the name cache */ 430 431 for (hash = 0; hash < CODA_CACHESIZE; hash++) { 432 for (cp = coda_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) { 433 if (!ODD(cp->c_fid.Vnode)) /* only files can be executed */ 434 coda_vmflush(cp); 435 } 436 } 437 } 438 439 /* 440 * As a debugging measure, print out any cnodes that lived through a 441 * name cache flush. 442 */ 443 void 444 coda_testflush(void) 445 { 446 int hash; 447 struct cnode *cp; 448 449 for (hash = 0; hash < CODA_CACHESIZE; hash++) { 450 for (cp = coda_cache[hash]; 451 cp != NULL; 452 cp = CNODE_NEXT(cp)) { 453 myprintf(("Live cnode fid %lx.%lx.%lx count %ld\n", 454 (cp->c_fid).Volume,(cp->c_fid).Vnode, 455 (cp->c_fid).Unique, CTOV(cp)->v_usecount)); 456 } 457 } 458 } 459 460 /* 461 * First, step through all cnodes and mark them unmounting. 462 * NetBSD kernels may try to fsync them now that venus 463 * is dead, which would be a bad thing. 464 * 465 */ 466 void 467 coda_unmounting(whoIam) 468 struct mount *whoIam; 469 { 470 int hash; 471 struct cnode *cp; 472 473 for (hash = 0; hash < CODA_CACHESIZE; hash++) { 474 for (cp = coda_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) { 475 if (CTOV(cp)->v_mount == whoIam) { 476 if (cp->c_flags & (C_LOCKED|C_WANTED)) { 477 printf("coda_unmounting: Unlocking %p\n", cp); 478 cp->c_flags &= ~(C_LOCKED|C_WANTED); 479 wakeup((caddr_t) cp); 480 } 481 cp->c_flags |= C_UNMOUNTING; 482 } 483 } 484 } 485 } 486 487 #ifdef DEBUG 488 void 489 coda_checkunmounting(mp) 490 struct mount *mp; 491 { 492 register struct vnode *vp, *nvp; 493 struct cnode *cp; 494 int count = 0, bad = 0; 495 loop: 496 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 497 if (vp->v_mount != mp) 498 goto loop; 499 nvp = vp->v_mntvnodes.le_next; 500 cp = VTOC(vp); 501 count++; 502 if (!(cp->c_flags & C_UNMOUNTING)) { 503 bad++; 504 printf("vp %p, cp %p missed\n", vp, cp); 505 cp->c_flags |= C_UNMOUNTING; 506 } 507 } 508 } 509 510 void 511 coda_cacheprint(whoIam) 512 struct mount *whoIam; 513 { 514 int hash; 515 struct cnode *cp; 516 int count = 0; 517 518 printf("coda_cacheprint: coda_ctlvp %p, cp %p", coda_ctlvp, VTOC(coda_ctlvp)); 519 coda_nc_name(VTOC(coda_ctlvp)); 520 printf("\n"); 521 522 for (hash = 0; hash < CODA_CACHESIZE; hash++) { 523 for (cp = coda_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) { 524 if (CTOV(cp)->v_mount == whoIam) { 525 printf("coda_cacheprint: vp %p, cp %p", CTOV(cp), cp); 526 coda_nc_name(cp); 527 printf("\n"); 528 count++; 529 } 530 } 531 } 532 printf("coda_cacheprint: count %d\n", count); 533 } 534 #endif 535 536 /* 537 * There are 6 cases where invalidations occur. The semantics of each 538 * is listed here. 539 * 540 * CODA_FLUSH -- flush all entries from the name cache and the cnode cache. 541 * CODA_PURGEUSER -- flush all entries from the name cache for a specific user 542 * This call is a result of token expiration. 543 * 544 * The next two are the result of callbacks on a file or directory. 545 * CODA_ZAPDIR -- flush the attributes for the dir from its cnode. 546 * Zap all children of this directory from the namecache. 547 * CODA_ZAPFILE -- flush the attributes for a file. 548 * 549 * The fifth is a result of Venus detecting an inconsistent file. 550 * CODA_PURGEFID -- flush the attribute for the file 551 * If it is a dir (odd vnode), purge its 552 * children from the namecache 553 * remove the file from the namecache. 554 * 555 * The sixth allows Venus to replace local fids with global ones 556 * during reintegration. 557 * 558 * CODA_REPLACE -- replace one ViceFid with another throughout the name cache 559 */ 560 561 int handleDownCall(opcode, out) 562 int opcode; union outputArgs *out; 563 { 564 int error; 565 566 /* Handle invalidate requests. */ 567 switch (opcode) { 568 case CODA_FLUSH : { 569 570 coda_flush(IS_DOWNCALL); 571 572 CODADEBUG(CODA_FLUSH,coda_testflush();) /* print remaining cnodes */ 573 return(0); 574 } 575 576 case CODA_PURGEUSER : { 577 coda_clstat.ncalls++; 578 coda_clstat.reqs[CODA_PURGEUSER]++; 579 580 /* XXX - need to prevent fsync's */ 581 coda_nc_purge_user(out->coda_purgeuser.cred.cr_uid, IS_DOWNCALL); 582 return(0); 583 } 584 585 case CODA_ZAPFILE : { 586 struct cnode *cp; 587 588 error = 0; 589 coda_clstat.ncalls++; 590 coda_clstat.reqs[CODA_ZAPFILE]++; 591 592 cp = coda_find(&out->coda_zapfile.CodaFid); 593 if (cp != NULL) { 594 vref(CTOV(cp)); 595 596 cp->c_flags &= ~C_VATTR; 597 if (CTOV(cp)->v_flag & VTEXT) 598 error = coda_vmflush(cp); 599 CODADEBUG(CODA_ZAPFILE, myprintf(("zapfile: fid = (%lx.%lx.%lx), 600 refcnt = %ld, error = %d\n", 601 cp->c_fid.Volume, 602 cp->c_fid.Vnode, 603 cp->c_fid.Unique, 604 CTOV(cp)->v_usecount - 1, error));); 605 if (CTOV(cp)->v_usecount == 1) { 606 cp->c_flags |= C_PURGING; 607 } 608 vrele(CTOV(cp)); 609 } 610 611 return(error); 612 } 613 614 case CODA_ZAPDIR : { 615 struct cnode *cp; 616 617 coda_clstat.ncalls++; 618 coda_clstat.reqs[CODA_ZAPDIR]++; 619 620 cp = coda_find(&out->coda_zapdir.CodaFid); 621 if (cp != NULL) { 622 vref(CTOV(cp)); 623 624 cp->c_flags &= ~C_VATTR; 625 coda_nc_zapParentfid(&out->coda_zapdir.CodaFid, IS_DOWNCALL); 626 627 CODADEBUG(CODA_ZAPDIR, myprintf(("zapdir: fid = (%lx.%lx.%lx), 628 refcnt = %ld\n",cp->c_fid.Volume, 629 cp->c_fid.Vnode, 630 cp->c_fid.Unique, 631 CTOV(cp)->v_usecount - 1));); 632 if (CTOV(cp)->v_usecount == 1) { 633 cp->c_flags |= C_PURGING; 634 } 635 vrele(CTOV(cp)); 636 } 637 638 return(0); 639 } 640 641 case CODA_PURGEFID : { 642 struct cnode *cp; 643 644 error = 0; 645 coda_clstat.ncalls++; 646 coda_clstat.reqs[CODA_PURGEFID]++; 647 648 cp = coda_find(&out->coda_purgefid.CodaFid); 649 if (cp != NULL) { 650 vref(CTOV(cp)); 651 if (ODD(out->coda_purgefid.CodaFid.Vnode)) { /* Vnode is a directory */ 652 coda_nc_zapParentfid(&out->coda_purgefid.CodaFid, 653 IS_DOWNCALL); 654 } 655 cp->c_flags &= ~C_VATTR; 656 coda_nc_zapfid(&out->coda_purgefid.CodaFid, IS_DOWNCALL); 657 if (!(ODD(out->coda_purgefid.CodaFid.Vnode)) 658 && (CTOV(cp)->v_flag & VTEXT)) { 659 660 error = coda_vmflush(cp); 661 } 662 CODADEBUG(CODA_PURGEFID, myprintf(("purgefid: fid = (%lx.%lx.%lx), refcnt = %ld, error = %d\n", 663 cp->c_fid.Volume, cp->c_fid.Vnode, 664 cp->c_fid.Unique, 665 CTOV(cp)->v_usecount - 1, error));); 666 if (CTOV(cp)->v_usecount == 1) { 667 cp->c_flags |= C_PURGING; 668 } 669 vrele(CTOV(cp)); 670 } 671 return(error); 672 } 673 674 case CODA_REPLACE : { 675 struct cnode *cp = NULL; 676 677 coda_clstat.ncalls++; 678 coda_clstat.reqs[CODA_REPLACE]++; 679 680 cp = coda_find(&out->coda_replace.OldFid); 681 if (cp != NULL) { 682 /* remove the cnode from the hash table, replace the fid, and reinsert */ 683 vref(CTOV(cp)); 684 coda_unsave(cp); 685 cp->c_fid = out->coda_replace.NewFid; 686 coda_save(cp); 687 688 CODADEBUG(CODA_REPLACE, myprintf(("replace: oldfid = (%lx.%lx.%lx), newfid = (%lx.%lx.%lx), cp = %p\n", 689 out->coda_replace.OldFid.Volume, 690 out->coda_replace.OldFid.Vnode, 691 out->coda_replace.OldFid.Unique, 692 cp->c_fid.Volume, cp->c_fid.Vnode, 693 cp->c_fid.Unique, cp));) 694 vrele(CTOV(cp)); 695 } 696 return (0); 697 } 698 default: 699 myprintf(("handleDownCall: unknown opcode %d\n", opcode)); 700 return (EINVAL); 701 } 702 } 703 704 /* coda_grab_vnode: lives in either cfs_mach.c or cfs_nbsd.c */ 705 706 int 707 coda_vmflush(cp) 708 struct cnode *cp; 709 { 710 return 0; 711 } 712 713 714 /* 715 * kernel-internal debugging switches 716 */ 717 718 void coda_debugon(void) 719 { 720 codadebug = -1; 721 coda_nc_debug = -1; 722 coda_vnop_print_entry = 1; 723 coda_psdev_print_entry = 1; 724 coda_vfsop_print_entry = 1; 725 } 726 727 void coda_debugoff(void) 728 { 729 codadebug = 0; 730 coda_nc_debug = 0; 731 coda_vnop_print_entry = 0; 732 coda_psdev_print_entry = 0; 733 coda_vfsop_print_entry = 0; 734 } 735 736 /* 737 * Utilities used by both client and server 738 * Standard levels: 739 * 0) no debugging 740 * 1) hard failures 741 * 2) soft failures 742 * 3) current test software 743 * 4) main procedure entry points 744 * 5) main procedure exit points 745 * 6) utility procedure entry points 746 * 7) utility procedure exit points 747 * 8) obscure procedure entry points 748 * 9) obscure procedure exit points 749 * 10) random stuff 750 * 11) all <= 1 751 * 12) all <= 2 752 * 13) all <= 3 753 * ... 754 */ 755
Indexes created Wed Sep 24 14:09:57 GMT 2025