coda_vnops.c revision 1.18
1 /* 2 coda_create/vn_open 3 remove/unlink 4 link 5 mkdir 6 rmdir 7 symlink 8 */ 9 /* $NetBSD: coda_vnops.c,v 1.18 2000/04/05 18:39:09 phil Exp $ */ 10 11 /* 12 * 13 * Coda: an Experimental Distributed File System 14 * Release 3.1 15 * 16 * Copyright (c) 1987-1998 Carnegie Mellon University 17 * All Rights Reserved 18 * 19 * Permission to use, copy, modify and distribute this software and its 20 * documentation is hereby granted, provided that both the copyright 21 * notice and this permission notice appear in all copies of the 22 * software, derivative works or modified versions, and any portions 23 * thereof, and that both notices appear in supporting documentation, and 24 * that credit is given to Carnegie Mellon University in all documents 25 * and publicity pertaining to direct or indirect use of this code or its 26 * derivatives. 27 * 28 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, 29 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS 30 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON 31 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER 32 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF 33 * ANY DERIVATIVE WORK. 34 * 35 * Carnegie Mellon encourages users of this software to return any 36 * improvements or extensions that they make, and to grant Carnegie 37 * Mellon the rights to redistribute these changes without encumbrance. 38 * 39 * @(#) coda/coda_vnops.c,v 1.1.1.1 1998/08/29 21:26:46 rvb Exp $ 40 */ 41 42 /* 43 * Mach Operating System 44 * Copyright (c) 1990 Carnegie-Mellon University 45 * Copyright (c) 1989 Carnegie-Mellon University 46 * All rights reserved. The CMU software License Agreement specifies 47 * the terms and conditions for use and redistribution. 48 */ 49 50 /* 51 * This code was written for the Coda file system at Carnegie Mellon 52 * University. Contributers include David Steere, James Kistler, and 53 * M. Satyanarayanan. 54 */ 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/malloc.h> 59 #include <sys/errno.h> 60 #include <sys/acct.h> 61 #include <sys/file.h> 62 #include <sys/uio.h> 63 #include <sys/namei.h> 64 #include <sys/ioctl.h> 65 #include <sys/mount.h> 66 #include <sys/proc.h> 67 #include <sys/select.h> 68 #include <sys/user.h> 69 #include <vm/vm.h> 70 #include <miscfs/genfs/genfs.h> 71 72 #include <coda/coda.h> 73 #include <coda/cnode.h> 74 #include <coda/coda_vnops.h> 75 #include <coda/coda_venus.h> 76 #include <coda/coda_opstats.h> 77 #include <coda/coda_subr.h> 78 #include <coda/coda_namecache.h> 79 #include <coda/coda_pioctl.h> 80 81 /* 82 * These flags select various performance enhancements. 83 */ 84 int coda_attr_cache = 1; /* Set to cache attributes in the kernel */ 85 int coda_symlink_cache = 1; /* Set to cache symbolic link information */ 86 int coda_access_cache = 1; /* Set to handle some access checks directly */ 87 88 /* structure to keep track of vfs calls */ 89 90 struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE]; 91 92 #define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++) 93 #define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++) 94 #define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++) 95 #define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++) 96 97 /* What we are delaying for in printf */ 98 int coda_printf_delay = 0; /* in microseconds */ 99 int coda_vnop_print_entry = 0; 100 static int coda_lockdebug = 0; 101 102 /* Definition of the vfs operation vector */ 103 104 /* 105 * Some NetBSD details: 106 * 107 * coda_start is called at the end of the mount syscall. 108 * coda_init is called at boot time. 109 */ 110 111 #define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__FUNCTION__)) 112 113 /* Definition of the vnode operation vector */ 114 115 struct vnodeopv_entry_desc coda_vnodeop_entries[] = { 116 { &vop_default_desc, coda_vop_error }, 117 { &vop_lookup_desc, coda_lookup }, /* lookup */ 118 { &vop_create_desc, coda_create }, /* create */ 119 { &vop_mknod_desc, coda_vop_error }, /* mknod */ 120 { &vop_open_desc, coda_open }, /* open */ 121 { &vop_close_desc, coda_close }, /* close */ 122 { &vop_access_desc, coda_access }, /* access */ 123 { &vop_getattr_desc, coda_getattr }, /* getattr */ 124 { &vop_setattr_desc, coda_setattr }, /* setattr */ 125 { &vop_read_desc, coda_read }, /* read */ 126 { &vop_write_desc, coda_write }, /* write */ 127 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 128 { &vop_ioctl_desc, coda_ioctl }, /* ioctl */ 129 /* 1.3 { &vop_select_desc, coda_select }, select */ 130 { &vop_mmap_desc, coda_vop_error }, /* mmap */ 131 { &vop_fsync_desc, coda_fsync }, /* fsync */ 132 { &vop_remove_desc, coda_remove }, /* remove */ 133 { &vop_link_desc, coda_link }, /* link */ 134 { &vop_rename_desc, coda_rename }, /* rename */ 135 { &vop_mkdir_desc, coda_mkdir }, /* mkdir */ 136 { &vop_rmdir_desc, coda_rmdir }, /* rmdir */ 137 { &vop_symlink_desc, coda_symlink }, /* symlink */ 138 { &vop_readdir_desc, coda_readdir }, /* readdir */ 139 { &vop_readlink_desc, coda_readlink }, /* readlink */ 140 { &vop_abortop_desc, coda_abortop }, /* abortop */ 141 { &vop_inactive_desc, coda_inactive }, /* inactive */ 142 { &vop_reclaim_desc, coda_reclaim }, /* reclaim */ 143 { &vop_lock_desc, coda_lock }, /* lock */ 144 { &vop_unlock_desc, coda_unlock }, /* unlock */ 145 { &vop_bmap_desc, coda_bmap }, /* bmap */ 146 { &vop_strategy_desc, coda_strategy }, /* strategy */ 147 { &vop_print_desc, coda_vop_error }, /* print */ 148 { &vop_islocked_desc, coda_islocked }, /* islocked */ 149 { &vop_pathconf_desc, coda_vop_error }, /* pathconf */ 150 { &vop_advlock_desc, coda_vop_nop }, /* advlock */ 151 { &vop_bwrite_desc, coda_vop_error }, /* bwrite */ 152 { &vop_lease_desc, coda_vop_nop }, /* lease */ 153 { &vop_blkatoff_desc, coda_vop_error }, /* blkatoff */ 154 { &vop_valloc_desc, coda_vop_error }, /* valloc */ 155 { &vop_vfree_desc, coda_vop_error }, /* vfree */ 156 { &vop_truncate_desc, coda_vop_error }, /* truncate */ 157 { &vop_update_desc, coda_vop_error }, /* update */ 158 { &vop_seek_desc, genfs_seek }, /* seek */ 159 { &vop_poll_desc, genfs_poll }, /* poll */ 160 161 { (struct vnodeop_desc*)NULL, (int(*)(void *))NULL } 162 }; 163 164 struct vnodeopv_desc coda_vnodeop_opv_desc = 165 { &coda_vnodeop_p, coda_vnodeop_entries }; 166 167 /* Definitions of NetBSD vnodeop interfaces */ 168 169 /* A generic panic: we were called with something we didn't define yet */ 170 int 171 coda_vop_error(void *anon) { 172 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 173 174 myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n", 175 (*desc)->vdesc_name)); 176 /* 177 panic("coda_nbsd_vop_error"); 178 return 0; 179 */ 180 return EIO; 181 } 182 183 /* A generic do-nothing. For lease_check, advlock */ 184 int 185 coda_vop_nop(void *anon) { 186 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 187 188 if (codadebug) { 189 myprintf(("Vnode operation %s called, but unsupported\n", 190 (*desc)->vdesc_name)); 191 } 192 return (0); 193 } 194 195 int 196 coda_vnodeopstats_init(void) 197 { 198 int i; 199 200 for(i=0;i<CODA_VNODEOPS_SIZE;i++) { 201 coda_vnodeopstats[i].opcode = i; 202 coda_vnodeopstats[i].entries = 0; 203 coda_vnodeopstats[i].sat_intrn = 0; 204 coda_vnodeopstats[i].unsat_intrn = 0; 205 coda_vnodeopstats[i].gen_intrn = 0; 206 } 207 208 return 0; 209 } 210 211 /* 212 * coda_open calls Venus to return the device, inode pair of the cache 213 * file holding the data. Using iget, coda_open finds the vnode of the 214 * cache file, and then opens it. 215 */ 216 int 217 coda_open(v) 218 void *v; 219 { 220 /* 221 * NetBSD can pass the O_EXCL flag in mode, even though the check 222 * has already happened. Venus defensively assumes that if open 223 * is passed the EXCL, it must be a bug. We strip the flag here. 224 */ 225 /* true args */ 226 struct vop_open_args *ap = v; 227 struct vnode **vpp = &(ap->a_vp); 228 struct cnode *cp = VTOC(*vpp); 229 int flag = ap->a_mode & (~O_EXCL); 230 struct ucred *cred = ap->a_cred; 231 struct proc *p = ap->a_p; 232 /* locals */ 233 int error; 234 struct vnode *vp; 235 dev_t dev; 236 ino_t inode; 237 238 MARK_ENTRY(CODA_OPEN_STATS); 239 240 /* Check for open of control file. */ 241 if (IS_CTL_VP(*vpp)) { 242 /* XXX */ 243 /* if (WRITEABLE(flag)) */ 244 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) { 245 MARK_INT_FAIL(CODA_OPEN_STATS); 246 return(EACCES); 247 } 248 MARK_INT_SAT(CODA_OPEN_STATS); 249 return(0); 250 } 251 252 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, p, &dev, &inode); 253 if (error) 254 return (error); 255 if (!error) { 256 CODADEBUG( CODA_OPEN,myprintf(("open: dev %d inode %d result %d\n", 257 dev, inode, error)); ) 258 } 259 260 /* Translate the <device, inode> pair for the cache file into 261 an inode pointer. */ 262 error = coda_grab_vnode(dev, inode, &vp); 263 if (error) 264 return (error); 265 266 /* We get the vnode back locked in both Mach and NetBSD. Needs unlocked */ 267 VOP_UNLOCK(vp, 0); 268 /* Keep a reference until the close comes in. */ 269 vref(*vpp); 270 271 /* Save the vnode pointer for the cache file. */ 272 if (cp->c_ovp == NULL) { 273 cp->c_ovp = vp; 274 } else { 275 if (cp->c_ovp != vp) 276 panic("coda_open: cp->c_ovp != ITOV(ip)"); 277 } 278 cp->c_ocount++; 279 280 /* Flush the attribute cached if writing the file. */ 281 if (flag & FWRITE) { 282 cp->c_owrite++; 283 cp->c_flags &= ~C_VATTR; 284 } 285 286 /* Save the <device, inode> pair for the cache file to speed 287 up subsequent page_read's. */ 288 cp->c_device = dev; 289 cp->c_inode = inode; 290 291 /* Open the cache file. */ 292 error = VOP_OPEN(vp, flag, cred, p); 293 return(error); 294 } 295 296 /* 297 * Close the cache file used for I/O and notify Venus. 298 */ 299 int 300 coda_close(v) 301 void *v; 302 { 303 /* true args */ 304 struct vop_close_args *ap = v; 305 struct vnode *vp = ap->a_vp; 306 struct cnode *cp = VTOC(vp); 307 int flag = ap->a_fflag; 308 struct ucred *cred = ap->a_cred; 309 struct proc *p = ap->a_p; 310 /* locals */ 311 int error; 312 313 MARK_ENTRY(CODA_CLOSE_STATS); 314 315 /* Check for close of control file. */ 316 if (IS_CTL_VP(vp)) { 317 MARK_INT_SAT(CODA_CLOSE_STATS); 318 return(0); 319 } 320 321 if (IS_UNMOUNTING(cp)) { 322 if (cp->c_ovp) { 323 #ifdef CODA_VERBOSE 324 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n", 325 vp->v_usecount, cp->c_ovp, vp, cp); 326 #endif 327 #ifdef hmm 328 vgone(cp->c_ovp); 329 #else 330 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY); 331 VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 332 vput(cp->c_ovp); 333 #endif 334 } else { 335 #ifdef CODA_VERBOSE 336 printf("coda_close: NO container vp %p/cp %p\n", vp, cp); 337 #endif 338 } 339 return ENODEV; 340 } else { 341 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY); 342 VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 343 vput(cp->c_ovp); 344 } 345 346 if (--cp->c_ocount == 0) 347 cp->c_ovp = NULL; 348 349 if (flag & FWRITE) /* file was opened for write */ 350 --cp->c_owrite; 351 352 error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, p); 353 vrele(CTOV(cp)); 354 355 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); ) 356 return(error); 357 } 358 359 int 360 coda_read(v) 361 void *v; 362 { 363 struct vop_read_args *ap = v; 364 365 ENTRY; 366 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ, 367 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 368 } 369 370 int 371 coda_write(v) 372 void *v; 373 { 374 struct vop_write_args *ap = v; 375 376 ENTRY; 377 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE, 378 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 379 } 380 381 int 382 coda_rdwr(vp, uiop, rw, ioflag, cred, p) 383 struct vnode *vp; 384 struct uio *uiop; 385 enum uio_rw rw; 386 int ioflag; 387 struct ucred *cred; 388 struct proc *p; 389 { 390 /* upcall decl */ 391 /* NOTE: container file operation!!! */ 392 /* locals */ 393 struct cnode *cp = VTOC(vp); 394 struct vnode *cfvp = cp->c_ovp; 395 int igot_internally = 0; 396 int opened_internally = 0; 397 int error = 0; 398 399 MARK_ENTRY(CODA_RDWR_STATS); 400 401 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %lu, %lld, %d)\n", rw, 402 uiop->uio_iov->iov_base, 403 (unsigned long) uiop->uio_resid, 404 (long long) uiop->uio_offset, uiop->uio_segflg)); ) 405 406 /* Check for rdwr of control object. */ 407 if (IS_CTL_VP(vp)) { 408 MARK_INT_FAIL(CODA_RDWR_STATS); 409 return(EINVAL); 410 } 411 412 /* Redirect the request to UFS. */ 413 414 /* 415 * If file is not already open this must be a page 416 * {read,write} request. Iget the cache file's inode 417 * pointer if we still have its <device, inode> pair. 418 * Otherwise, we must do an internal open to derive the 419 * pair. 420 */ 421 if (cfvp == NULL) { 422 /* 423 * If we're dumping core, do the internal open. Otherwise 424 * venus won't have the correct size of the core when 425 * it's completely written. 426 */ 427 if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 428 igot_internally = 1; 429 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp); 430 if (error) { 431 MARK_INT_FAIL(CODA_RDWR_STATS); 432 return(error); 433 } 434 /* 435 * We get the vnode back locked in both Mach and 436 * NetBSD. Needs unlocked 437 */ 438 VOP_UNLOCK(cfvp, 0); 439 } 440 else { 441 opened_internally = 1; 442 MARK_INT_GEN(CODA_OPEN_STATS); 443 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), 444 cred, p); 445 #ifdef CODA_VERBOSE 446 printf("coda_rdwr: Internally Opening %p\n", vp); 447 #endif 448 if (error) { 449 MARK_INT_FAIL(CODA_RDWR_STATS); 450 return(error); 451 } 452 cfvp = cp->c_ovp; 453 } 454 } 455 456 /* Have UFS handle the call. */ 457 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %ld\n", 458 cp->c_fid.Volume, cp->c_fid.Vnode, 459 cp->c_fid.Unique, CTOV(cp)->v_usecount)); ) 460 461 if (rw == UIO_READ) { 462 error = VOP_READ(cfvp, uiop, ioflag, cred); 463 } else { 464 error = VOP_WRITE(cfvp, uiop, ioflag, cred); 465 } 466 467 if (error) 468 MARK_INT_FAIL(CODA_RDWR_STATS); 469 else 470 MARK_INT_SAT(CODA_RDWR_STATS); 471 472 /* Do an internal close if necessary. */ 473 if (opened_internally) { 474 MARK_INT_GEN(CODA_CLOSE_STATS); 475 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, p); 476 } 477 478 /* Invalidate cached attributes if writing. */ 479 if (rw == UIO_WRITE) 480 cp->c_flags &= ~C_VATTR; 481 return(error); 482 } 483 484 int 485 coda_ioctl(v) 486 void *v; 487 { 488 /* true args */ 489 struct vop_ioctl_args *ap = v; 490 struct vnode *vp = ap->a_vp; 491 int com = ap->a_command; 492 caddr_t data = ap->a_data; 493 int flag = ap->a_fflag; 494 struct ucred *cred = ap->a_cred; 495 struct proc *p = ap->a_p; 496 /* locals */ 497 int error; 498 struct vnode *tvp; 499 struct nameidata ndp; 500 struct PioctlData *iap = (struct PioctlData *)data; 501 502 MARK_ENTRY(CODA_IOCTL_STATS); 503 504 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));) 505 506 /* Don't check for operation on a dying object, for ctlvp it 507 shouldn't matter */ 508 509 /* Must be control object to succeed. */ 510 if (!IS_CTL_VP(vp)) { 511 MARK_INT_FAIL(CODA_IOCTL_STATS); 512 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));) 513 return (EOPNOTSUPP); 514 } 515 /* Look up the pathname. */ 516 517 /* Should we use the name cache here? It would get it from 518 lookupname sooner or later anyway, right? */ 519 520 NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, ((caddr_t)iap->path), p); 521 error = namei(&ndp); 522 tvp = ndp.ni_vp; 523 524 if (error) { 525 MARK_INT_FAIL(CODA_IOCTL_STATS); 526 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n", 527 error));) 528 return(error); 529 } 530 531 /* 532 * Make sure this is a coda style cnode, but it may be a 533 * different vfsp 534 */ 535 /* XXX: this totally violates the comment about vtagtype in vnode.h */ 536 if (tvp->v_tag != VT_CODA) { 537 vrele(tvp); 538 MARK_INT_FAIL(CODA_IOCTL_STATS); 539 CODADEBUG(CODA_IOCTL, 540 myprintf(("coda_ioctl error: %s not a coda object\n", 541 iap->path));) 542 return(EINVAL); 543 } 544 545 if (iap->vi.in_size > VC_MAXDATASIZE) { 546 vrele(tvp); 547 return(EINVAL); 548 } 549 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, p); 550 551 if (error) 552 MARK_INT_FAIL(CODA_IOCTL_STATS); 553 else 554 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) 555 556 vrele(tvp); 557 return(error); 558 } 559 560 /* 561 * To reduce the cost of a user-level venus;we cache attributes in 562 * the kernel. Each cnode has storage allocated for an attribute. If 563 * c_vattr is valid, return a reference to it. Otherwise, get the 564 * attributes from venus and store them in the cnode. There is some 565 * question if this method is a security leak. But I think that in 566 * order to make this call, the user must have done a lookup and 567 * opened the file, and therefore should already have access. 568 */ 569 int 570 coda_getattr(v) 571 void *v; 572 { 573 /* true args */ 574 struct vop_getattr_args *ap = v; 575 struct vnode *vp = ap->a_vp; 576 struct cnode *cp = VTOC(vp); 577 struct vattr *vap = ap->a_vap; 578 struct ucred *cred = ap->a_cred; 579 struct proc *p = ap->a_p; 580 /* locals */ 581 int error; 582 583 MARK_ENTRY(CODA_GETATTR_STATS); 584 585 /* Check for getattr of control object. */ 586 if (IS_CTL_VP(vp)) { 587 MARK_INT_FAIL(CODA_GETATTR_STATS); 588 return(ENOENT); 589 } 590 591 /* Check to see if the attributes have already been cached */ 592 if (VALID_VATTR(cp)) { 593 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n", 594 cp->c_fid.Volume, 595 cp->c_fid.Vnode, 596 cp->c_fid.Unique));}); 597 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 598 print_vattr(&cp->c_vattr); ); 599 600 *vap = cp->c_vattr; 601 MARK_INT_SAT(CODA_GETATTR_STATS); 602 return(0); 603 } 604 605 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, p, vap); 606 607 if (!error) { 608 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n", 609 cp->c_fid.Volume, 610 cp->c_fid.Vnode, 611 cp->c_fid.Unique, 612 error)); ) 613 614 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 615 print_vattr(vap); ); 616 617 /* If not open for write, store attributes in cnode */ 618 if ((cp->c_owrite == 0) && (coda_attr_cache)) { 619 cp->c_vattr = *vap; 620 cp->c_flags |= C_VATTR; 621 } 622 623 } 624 return(error); 625 } 626 627 int 628 coda_setattr(v) 629 void *v; 630 { 631 /* true args */ 632 struct vop_setattr_args *ap = v; 633 struct vnode *vp = ap->a_vp; 634 struct cnode *cp = VTOC(vp); 635 struct vattr *vap = ap->a_vap; 636 struct ucred *cred = ap->a_cred; 637 struct proc *p = ap->a_p; 638 /* locals */ 639 int error; 640 641 MARK_ENTRY(CODA_SETATTR_STATS); 642 643 /* Check for setattr of control object. */ 644 if (IS_CTL_VP(vp)) { 645 MARK_INT_FAIL(CODA_SETATTR_STATS); 646 return(ENOENT); 647 } 648 649 if (codadebug & CODADBGMSK(CODA_SETATTR)) { 650 print_vattr(vap); 651 } 652 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, p); 653 654 if (!error) 655 cp->c_flags &= ~C_VATTR; 656 657 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); ) 658 return(error); 659 } 660 661 int 662 coda_access(v) 663 void *v; 664 { 665 /* true args */ 666 struct vop_access_args *ap = v; 667 struct vnode *vp = ap->a_vp; 668 struct cnode *cp = VTOC(vp); 669 int mode = ap->a_mode; 670 struct ucred *cred = ap->a_cred; 671 struct proc *p = ap->a_p; 672 /* locals */ 673 int error; 674 675 MARK_ENTRY(CODA_ACCESS_STATS); 676 677 /* Check for access of control object. Only read access is 678 allowed on it. */ 679 if (IS_CTL_VP(vp)) { 680 /* bogus hack - all will be marked as successes */ 681 MARK_INT_SAT(CODA_ACCESS_STATS); 682 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 683 ? 0 : EACCES); 684 } 685 686 /* 687 * if the file is a directory, and we are checking exec (eg lookup) 688 * access, and the file is in the namecache, then the user must have 689 * lookup access to it. 690 */ 691 if (coda_access_cache) { 692 if ((vp->v_type == VDIR) && (mode & VEXEC)) { 693 if (coda_nc_lookup(cp, ".", 1, cred)) { 694 MARK_INT_SAT(CODA_ACCESS_STATS); 695 return(0); /* it was in the cache */ 696 } 697 } 698 } 699 700 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, p); 701 702 return(error); 703 } 704 705 /* 706 * CODA abort op, called after namei() when a CREATE/DELETE isn't actually 707 * done. If a buffer has been saved in anticipation of a coda_create or 708 * a coda_remove, delete it. 709 */ 710 /* ARGSUSED */ 711 int 712 coda_abortop(v) 713 void *v; 714 { 715 /* true args */ 716 struct vop_abortop_args /* { 717 struct vnode *a_dvp; 718 struct componentname *a_cnp; 719 } */ *ap = v; 720 /* upcall decl */ 721 /* locals */ 722 723 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 724 FREE(ap->a_cnp->cn_pnbuf, M_NAMEI); 725 return (0); 726 } 727 728 int 729 coda_readlink(v) 730 void *v; 731 { 732 /* true args */ 733 struct vop_readlink_args *ap = v; 734 struct vnode *vp = ap->a_vp; 735 struct cnode *cp = VTOC(vp); 736 struct uio *uiop = ap->a_uio; 737 struct ucred *cred = ap->a_cred; 738 struct proc *p = ap->a_uio->uio_procp; 739 /* locals */ 740 int error; 741 char *str; 742 int len; 743 744 MARK_ENTRY(CODA_READLINK_STATS); 745 746 /* Check for readlink of control object. */ 747 if (IS_CTL_VP(vp)) { 748 MARK_INT_FAIL(CODA_READLINK_STATS); 749 return(ENOENT); 750 } 751 752 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ 753 uiop->uio_rw = UIO_READ; 754 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); 755 if (error) 756 MARK_INT_FAIL(CODA_READLINK_STATS); 757 else 758 MARK_INT_SAT(CODA_READLINK_STATS); 759 return(error); 760 } 761 762 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, p, &str, &len); 763 764 if (!error) { 765 uiop->uio_rw = UIO_READ; 766 error = uiomove(str, len, uiop); 767 768 if (coda_symlink_cache) { 769 cp->c_symlink = str; 770 cp->c_symlen = len; 771 cp->c_flags |= C_SYMLINK; 772 } else 773 CODA_FREE(str, len); 774 } 775 776 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) 777 return(error); 778 } 779 780 int 781 coda_fsync(v) 782 void *v; 783 { 784 /* true args */ 785 struct vop_fsync_args *ap = v; 786 struct vnode *vp = ap->a_vp; 787 struct cnode *cp = VTOC(vp); 788 struct ucred *cred = ap->a_cred; 789 struct proc *p = ap->a_p; 790 /* locals */ 791 struct vnode *convp = cp->c_ovp; 792 int error; 793 794 MARK_ENTRY(CODA_FSYNC_STATS); 795 796 /* Check for fsync on an unmounting object */ 797 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync 798 * after an unmount has been initiated. This is a Bad Thing, 799 * which we have to avoid. Not a legitimate failure for stats. 800 */ 801 if (IS_UNMOUNTING(cp)) { 802 return(ENODEV); 803 } 804 805 /* Check for fsync of control object. */ 806 if (IS_CTL_VP(vp)) { 807 MARK_INT_SAT(CODA_FSYNC_STATS); 808 return(0); 809 } 810 811 if (convp) 812 VOP_FSYNC(convp, cred, MNT_WAIT, p); 813 814 /* 815 * We can expect fsync on any vnode at all if venus is pruging it. 816 * Venus can't very well answer the fsync request, now can it? 817 * Hopefully, it won't have to, because hopefully, venus preserves 818 * the (possibly untrue) invariant that it never purges an open 819 * vnode. Hopefully. 820 */ 821 if (cp->c_flags & C_PURGING) { 822 return(0); 823 } 824 825 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, p); 826 827 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ); 828 return(error); 829 } 830 831 int 832 coda_inactive(v) 833 void *v; 834 { 835 /* XXX - at the moment, inactive doesn't look at cred, and doesn't 836 have a proc pointer. Oops. */ 837 /* true args */ 838 struct vop_inactive_args *ap = v; 839 struct vnode *vp = ap->a_vp; 840 struct cnode *cp = VTOC(vp); 841 struct ucred *cred __attribute__((unused)) = NULL; 842 struct proc *p __attribute__((unused)) = curproc; 843 /* upcall decl */ 844 /* locals */ 845 846 /* We don't need to send inactive to venus - DCS */ 847 MARK_ENTRY(CODA_INACTIVE_STATS); 848 849 if (IS_CTL_VP(vp)) { 850 MARK_INT_SAT(CODA_INACTIVE_STATS); 851 return 0; 852 } 853 854 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n", 855 cp->c_fid.Volume, cp->c_fid.Vnode, 856 cp->c_fid.Unique, vp->v_mount));) 857 858 /* If an array has been allocated to hold the symlink, deallocate it */ 859 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { 860 if (cp->c_symlink == NULL) 861 panic("coda_inactive: null symlink pointer in cnode"); 862 863 CODA_FREE(cp->c_symlink, cp->c_symlen); 864 cp->c_flags &= ~C_SYMLINK; 865 cp->c_symlen = 0; 866 } 867 868 /* Remove it from the table so it can't be found. */ 869 coda_unsave(cp); 870 if ((struct coda_mntinfo *)(vp->v_mount->mnt_data) == NULL) { 871 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); 872 panic("badness in coda_inactive\n"); 873 } 874 875 if (IS_UNMOUNTING(cp)) { 876 #ifdef DEBUG 877 printf("coda_inactive: IS_UNMOUNTING use %ld: vp %p, cp %p\n", vp->v_usecount, vp, cp); 878 if (cp->c_ovp != NULL) 879 printf("coda_inactive: cp->ovp != NULL use %ld: vp %p, cp %p\n", 880 vp->v_usecount, vp, cp); 881 #endif 882 lockmgr(&vp->v_lock, LK_RELEASE, &vp->v_interlock); 883 } else { 884 #ifdef OLD_DIAGNOSTIC 885 if (CTOV(cp)->v_usecount) { 886 panic("coda_inactive: nonzero reference count"); 887 } 888 if (cp->c_ovp != NULL) { 889 panic("coda_inactive: cp->ovp != NULL"); 890 } 891 #endif 892 VOP_UNLOCK(vp, 0); 893 vgone(vp); 894 } 895 896 MARK_INT_SAT(CODA_INACTIVE_STATS); 897 return(0); 898 } 899 900 /* 901 * Remote file system operations having to do with directory manipulation. 902 */ 903 904 /* 905 * It appears that in NetBSD, lookup is supposed to return the vnode locked 906 */ 907 int 908 coda_lookup(v) 909 void *v; 910 { 911 /* true args */ 912 struct vop_lookup_args *ap = v; 913 struct vnode *dvp = ap->a_dvp; 914 struct cnode *dcp = VTOC(dvp); 915 struct vnode **vpp = ap->a_vpp; 916 /* 917 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest 918 * of the string to xlate, and that we must try to get at least 919 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I 920 * could be wrong. 921 */ 922 struct componentname *cnp = ap->a_cnp; 923 struct ucred *cred = cnp->cn_cred; 924 struct proc *p = cnp->cn_proc; 925 /* locals */ 926 struct cnode *cp; 927 const char *nm = cnp->cn_nameptr; 928 int len = cnp->cn_namelen; 929 ViceFid VFid; 930 int vtype; 931 int error = 0; 932 933 cnp->cn_flags &= ~PDIRUNLOCK; 934 935 MARK_ENTRY(CODA_LOOKUP_STATS); 936 937 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n", 938 nm, dcp->c_fid.Volume, 939 dcp->c_fid.Vnode, dcp->c_fid.Unique));); 940 941 /* Check for lookup of control object. */ 942 if (IS_CTL_NAME(dvp, nm, len)) { 943 *vpp = coda_ctlvp; 944 vref(*vpp); 945 MARK_INT_SAT(CODA_LOOKUP_STATS); 946 goto exit; 947 } 948 949 if (len+1 > CODA_MAXNAMLEN) { 950 MARK_INT_FAIL(CODA_LOOKUP_STATS); 951 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n", 952 dcp->c_fid.Volume, dcp->c_fid.Vnode, 953 dcp->c_fid.Unique, nm));); 954 *vpp = (struct vnode *)0; 955 error = EINVAL; 956 goto exit; 957 } 958 /* First try to look the file up in the cfs name cache */ 959 /* lock the parent vnode? */ 960 cp = coda_nc_lookup(dcp, nm, len, cred); 961 if (cp) { 962 *vpp = CTOV(cp); 963 vref(*vpp); 964 CODADEBUG(CODA_LOOKUP, 965 myprintf(("lookup result %d vpp %p\n",error,*vpp));) 966 } else { 967 968 /* The name wasn't cached, so we need to contact Venus */ 969 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, p, &VFid, &vtype); 970 971 if (error) { 972 MARK_INT_FAIL(CODA_LOOKUP_STATS); 973 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n", 974 dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));) 975 *vpp = (struct vnode *)0; 976 } else { 977 MARK_INT_SAT(CODA_LOOKUP_STATS); 978 CODADEBUG(CODA_LOOKUP, 979 myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n", 980 VFid.Volume, VFid.Vnode, VFid.Unique, vtype, 981 error)); ) 982 983 cp = make_coda_node(&VFid, dvp->v_mount, vtype); 984 *vpp = CTOV(cp); 985 986 /* enter the new vnode in the Name Cache only if the top bit isn't set */ 987 /* And don't enter a new vnode for an invalid one! */ 988 if (!(vtype & CODA_NOCACHE)) 989 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 990 } 991 } 992 993 exit: 994 /* 995 * If we are creating, and this was the last name to be looked up, 996 * and the error was ENOENT, then there really shouldn't be an 997 * error and we can make the leaf NULL and return success. Since 998 * this is supposed to work under Mach as well as NetBSD, we're 999 * leaving this fn wrapped. We also must tell lookup/namei that 1000 * we need to save the last component of the name. (Create will 1001 * have to free the name buffer later...lucky us...) 1002 */ 1003 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) 1004 && (cnp->cn_flags & ISLASTCN) 1005 && (error == ENOENT)) 1006 { 1007 error = EJUSTRETURN; 1008 cnp->cn_flags |= SAVENAME; 1009 *ap->a_vpp = NULL; 1010 } 1011 1012 /* 1013 * If we are removing, and we are at the last element, and we 1014 * found it, then we need to keep the name around so that the 1015 * removal will go ahead as planned. Unfortunately, this will 1016 * probably also lock the to-be-removed vnode, which may or may 1017 * not be a good idea. I'll have to look at the bits of 1018 * coda_remove to make sure. We'll only save the name if we did in 1019 * fact find the name, otherwise coda_remove won't have a chance 1020 * to free the pathname. 1021 */ 1022 if ((cnp->cn_nameiop == DELETE) 1023 && (cnp->cn_flags & ISLASTCN) 1024 && !error) 1025 { 1026 cnp->cn_flags |= SAVENAME; 1027 } 1028 1029 /* 1030 * If the lookup went well, we need to (potentially?) unlock the 1031 * parent, and lock the child. We are only responsible for 1032 * checking to see if the parent is supposed to be unlocked before 1033 * we return. We must always lock the child (provided there is 1034 * one, and (the parent isn't locked or it isn't the same as the 1035 * parent.) Simple, huh? We can never leave the parent locked unless 1036 * we are ISLASTCN 1037 */ 1038 if (!error || (error == EJUSTRETURN)) { 1039 if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) { 1040 if ((error = VOP_UNLOCK(dvp, 0))) { 1041 return error; 1042 } 1043 cnp->cn_flags |= PDIRUNLOCK; 1044 /* 1045 * The parent is unlocked. As long as there is a child, 1046 * lock it without bothering to check anything else. 1047 */ 1048 if (*ap->a_vpp) { 1049 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1050 printf("coda_lookup: "); 1051 panic("unlocked parent but couldn't lock child"); 1052 } 1053 } 1054 } else { 1055 /* The parent is locked, and may be the same as the child */ 1056 if (*ap->a_vpp && (*ap->a_vpp != dvp)) { 1057 /* Different, go ahead and lock it. */ 1058 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1059 printf("coda_lookup: "); 1060 panic("unlocked parent but couldn't lock child"); 1061 } 1062 } 1063 } 1064 } else { 1065 /* If the lookup failed, we need to ensure that the leaf is NULL */ 1066 /* Don't change any locking? */ 1067 *ap->a_vpp = NULL; 1068 } 1069 return(error); 1070 } 1071 1072 /*ARGSUSED*/ 1073 int 1074 coda_create(v) 1075 void *v; 1076 { 1077 /* true args */ 1078 struct vop_create_args *ap = v; 1079 struct vnode *dvp = ap->a_dvp; 1080 struct cnode *dcp = VTOC(dvp); 1081 struct vattr *va = ap->a_vap; 1082 int exclusive = 1; 1083 int mode = ap->a_vap->va_mode; 1084 struct vnode **vpp = ap->a_vpp; 1085 struct componentname *cnp = ap->a_cnp; 1086 struct ucred *cred = cnp->cn_cred; 1087 struct proc *p = cnp->cn_proc; 1088 /* locals */ 1089 int error; 1090 struct cnode *cp; 1091 const char *nm = cnp->cn_nameptr; 1092 int len = cnp->cn_namelen; 1093 ViceFid VFid; 1094 struct vattr attr; 1095 1096 MARK_ENTRY(CODA_CREATE_STATS); 1097 1098 /* All creates are exclusive XXX */ 1099 /* I'm assuming the 'mode' argument is the file mode bits XXX */ 1100 1101 /* Check for create of control object. */ 1102 if (IS_CTL_NAME(dvp, nm, len)) { 1103 *vpp = (struct vnode *)0; 1104 MARK_INT_FAIL(CODA_CREATE_STATS); 1105 return(EACCES); 1106 } 1107 1108 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, p, &VFid, &attr); 1109 1110 if (!error) { 1111 1112 /* If this is an exclusive create, panic if the file already exists. */ 1113 /* Venus should have detected the file and reported EEXIST. */ 1114 1115 if ((exclusive == 1) && 1116 (coda_find(&VFid) != NULL)) 1117 panic("cnode existed for newly created file!"); 1118 1119 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); 1120 *vpp = CTOV(cp); 1121 1122 /* Update va to reflect the new attributes. */ 1123 (*va) = attr; 1124 1125 /* Update the attribute cache and mark it as valid */ 1126 if (coda_attr_cache) { 1127 VTOC(*vpp)->c_vattr = attr; 1128 VTOC(*vpp)->c_flags |= C_VATTR; 1129 } 1130 1131 /* Invalidate the parent's attr cache, the modification time has changed */ 1132 VTOC(dvp)->c_flags &= ~C_VATTR; 1133 1134 /* enter the new vnode in the Name Cache */ 1135 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1136 1137 CODADEBUG(CODA_CREATE, 1138 myprintf(("create: (%lx.%lx.%lx), result %d\n", 1139 VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 1140 } else { 1141 *vpp = (struct vnode *)0; 1142 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));) 1143 } 1144 1145 /* Locking strategy. */ 1146 /* 1147 * In NetBSD, all creates must explicitly vput their dvp's. We'll 1148 * go ahead and use the LOCKLEAF flag of the cnp argument. 1149 * However, I'm pretty sure that create must return the leaf 1150 * locked; so there is a DIAGNOSTIC check to ensure that this is 1151 * true. 1152 */ 1153 vput(dvp); 1154 if (!error) { 1155 if (cnp->cn_flags & LOCKLEAF) { 1156 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1157 printf("coda_create: "); 1158 panic("unlocked parent but couldn't lock child"); 1159 } 1160 } 1161 #ifdef OLD_DIAGNOSTIC 1162 else { 1163 printf("coda_create: LOCKLEAF not set!\n"); 1164 } 1165 #endif 1166 } 1167 /* Have to free the previously saved name */ 1168 /* 1169 * This condition is stolen from ufs_makeinode. I have no idea 1170 * why it's here, but what the hey... 1171 */ 1172 if ((cnp->cn_flags & SAVESTART) == 0) { 1173 FREE(cnp->cn_pnbuf, M_NAMEI); 1174 } 1175 return(error); 1176 } 1177 1178 int 1179 coda_remove(v) 1180 void *v; 1181 { 1182 /* true args */ 1183 struct vop_remove_args *ap = v; 1184 struct vnode *dvp = ap->a_dvp; 1185 struct cnode *cp = VTOC(dvp); 1186 struct componentname *cnp = ap->a_cnp; 1187 struct ucred *cred = cnp->cn_cred; 1188 struct proc *p = cnp->cn_proc; 1189 /* locals */ 1190 int error; 1191 const char *nm = cnp->cn_nameptr; 1192 int len = cnp->cn_namelen; 1193 struct cnode *tp; 1194 1195 MARK_ENTRY(CODA_REMOVE_STATS); 1196 1197 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n", 1198 nm, cp->c_fid.Volume, cp->c_fid.Vnode, 1199 cp->c_fid.Unique));); 1200 1201 /* Remove the file's entry from the CODA Name Cache */ 1202 /* We're being conservative here, it might be that this person 1203 * doesn't really have sufficient access to delete the file 1204 * but we feel zapping the entry won't really hurt anyone -- dcs 1205 */ 1206 /* I'm gonna go out on a limb here. If a file and a hardlink to it 1207 * exist, and one is removed, the link count on the other will be 1208 * off by 1. We could either invalidate the attrs if cached, or 1209 * fix them. I'll try to fix them. DCS 11/8/94 1210 */ 1211 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); 1212 if (tp) { 1213 if (VALID_VATTR(tp)) { /* If attrs are cached */ 1214 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ 1215 tp->c_vattr.va_nlink--; 1216 } 1217 } 1218 1219 coda_nc_zapfile(VTOC(dvp), nm, len); 1220 /* No need to flush it if it doesn't exist! */ 1221 } 1222 /* Invalidate the parent's attr cache, the modification time has changed */ 1223 VTOC(dvp)->c_flags &= ~C_VATTR; 1224 1225 /* Check for remove of control object. */ 1226 if (IS_CTL_NAME(dvp, nm, len)) { 1227 MARK_INT_FAIL(CODA_REMOVE_STATS); 1228 return(ENOENT); 1229 } 1230 1231 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, p); 1232 1233 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) 1234 1235 /* 1236 * Regardless of what happens, we have to unconditionally drop 1237 * locks/refs on parent and child. (I hope). This is based on 1238 * what ufs_remove seems to be doing. 1239 */ 1240 if (dvp == ap->a_vp) { 1241 vrele(ap->a_vp); 1242 } else { 1243 vput(ap->a_vp); 1244 } 1245 vput(dvp); 1246 1247 if ((cnp->cn_flags & SAVESTART) == 0) { 1248 FREE(cnp->cn_pnbuf, M_NAMEI); 1249 } 1250 return(error); 1251 } 1252 1253 int 1254 coda_link(v) 1255 void *v; 1256 { 1257 /* true args */ 1258 struct vop_link_args *ap = v; 1259 struct vnode *vp = ap->a_vp; 1260 struct cnode *cp = VTOC(vp); 1261 struct vnode *tdvp = ap->a_dvp; 1262 struct cnode *tdcp = VTOC(tdvp); 1263 struct componentname *cnp = ap->a_cnp; 1264 struct ucred *cred = cnp->cn_cred; 1265 struct proc *p = cnp->cn_proc; 1266 /* locals */ 1267 int error; 1268 const char *nm = cnp->cn_nameptr; 1269 int len = cnp->cn_namelen; 1270 1271 MARK_ENTRY(CODA_LINK_STATS); 1272 1273 if (codadebug & CODADBGMSK(CODA_LINK)) { 1274 1275 myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n", 1276 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1277 myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n", 1278 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 1279 1280 } 1281 if (codadebug & CODADBGMSK(CODA_LINK)) { 1282 myprintf(("link: vp fid: (%lx.%lx.%lx)\n", 1283 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1284 myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n", 1285 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 1286 1287 } 1288 1289 /* Check for link to/from control object. */ 1290 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) { 1291 MARK_INT_FAIL(CODA_LINK_STATS); 1292 return(EACCES); 1293 } 1294 1295 /* 1296 * According to the ufs_link operation here's the locking situation: 1297 * We enter with the thing called "dvp" (the directory) locked. 1298 * We must unconditionally drop locks on "dvp" 1299 * 1300 * We enter with the thing called "vp" (the linked-to) unlocked, 1301 * but ref'd (?) 1302 * We seem to need to lock it before calling coda_link, and 1303 * unconditionally unlock it after. 1304 */ 1305 1306 if ((ap->a_vp != tdvp) && (error = vn_lock(ap->a_vp, LK_EXCLUSIVE))) { 1307 goto exit; 1308 } 1309 1310 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, p); 1311 1312 /* Invalidate the parent's attr cache, the modification time has changed */ 1313 VTOC(tdvp)->c_flags &= ~C_VATTR; 1314 VTOC(vp)->c_flags &= ~C_VATTR; 1315 1316 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) 1317 1318 exit: 1319 1320 if (ap->a_vp != tdvp) { 1321 VOP_UNLOCK(ap->a_vp, 0); 1322 } 1323 vput(tdvp); 1324 1325 /* Drop the name buffer if we don't need to SAVESTART */ 1326 if ((cnp->cn_flags & SAVESTART) == 0) { 1327 FREE(cnp->cn_pnbuf, M_NAMEI); 1328 } 1329 return(error); 1330 } 1331 1332 int 1333 coda_rename(v) 1334 void *v; 1335 { 1336 /* true args */ 1337 struct vop_rename_args *ap = v; 1338 struct vnode *odvp = ap->a_fdvp; 1339 struct cnode *odcp = VTOC(odvp); 1340 struct componentname *fcnp = ap->a_fcnp; 1341 struct vnode *ndvp = ap->a_tdvp; 1342 struct cnode *ndcp = VTOC(ndvp); 1343 struct componentname *tcnp = ap->a_tcnp; 1344 struct ucred *cred = fcnp->cn_cred; 1345 struct proc *p = fcnp->cn_proc; 1346 /* true args */ 1347 int error; 1348 const char *fnm = fcnp->cn_nameptr; 1349 int flen = fcnp->cn_namelen; 1350 const char *tnm = tcnp->cn_nameptr; 1351 int tlen = tcnp->cn_namelen; 1352 1353 MARK_ENTRY(CODA_RENAME_STATS); 1354 1355 /* Hmmm. The vnodes are already looked up. Perhaps they are locked? 1356 This could be Bad. XXX */ 1357 #ifdef OLD_DIAGNOSTIC 1358 if ((fcnp->cn_cred != tcnp->cn_cred) 1359 || (fcnp->cn_proc != tcnp->cn_proc)) 1360 { 1361 panic("coda_rename: component names don't agree"); 1362 } 1363 #endif 1364 1365 /* Check for rename involving control object. */ 1366 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { 1367 MARK_INT_FAIL(CODA_RENAME_STATS); 1368 return(EACCES); 1369 } 1370 1371 /* Problem with moving directories -- need to flush entry for .. */ 1372 if (odvp != ndvp) { 1373 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); 1374 if (ovcp) { 1375 struct vnode *ovp = CTOV(ovcp); 1376 if ((ovp) && 1377 (ovp->v_type == VDIR)) /* If it's a directory */ 1378 coda_nc_zapfile(VTOC(ovp),"..", 2); 1379 } 1380 } 1381 1382 /* Remove the entries for both source and target files */ 1383 coda_nc_zapfile(VTOC(odvp), fnm, flen); 1384 coda_nc_zapfile(VTOC(ndvp), tnm, tlen); 1385 1386 /* Invalidate the parent's attr cache, the modification time has changed */ 1387 VTOC(odvp)->c_flags &= ~C_VATTR; 1388 VTOC(ndvp)->c_flags &= ~C_VATTR; 1389 1390 if (flen+1 > CODA_MAXNAMLEN) { 1391 MARK_INT_FAIL(CODA_RENAME_STATS); 1392 error = EINVAL; 1393 goto exit; 1394 } 1395 1396 if (tlen+1 > CODA_MAXNAMLEN) { 1397 MARK_INT_FAIL(CODA_RENAME_STATS); 1398 error = EINVAL; 1399 goto exit; 1400 } 1401 1402 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, p); 1403 1404 exit: 1405 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) 1406 /* XXX - do we need to call cache pureg on the moved vnode? */ 1407 cache_purge(ap->a_fvp); 1408 1409 /* It seems to be incumbent on us to drop locks on all four vnodes */ 1410 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ 1411 1412 vrele(ap->a_fvp); 1413 vrele(odvp); 1414 1415 if (ap->a_tvp) { 1416 if (ap->a_tvp == ndvp) { 1417 vrele(ap->a_tvp); 1418 } else { 1419 vput(ap->a_tvp); 1420 } 1421 } 1422 1423 vput(ndvp); 1424 return(error); 1425 } 1426 1427 int 1428 coda_mkdir(v) 1429 void *v; 1430 { 1431 /* true args */ 1432 struct vop_mkdir_args *ap = v; 1433 struct vnode *dvp = ap->a_dvp; 1434 struct cnode *dcp = VTOC(dvp); 1435 struct componentname *cnp = ap->a_cnp; 1436 struct vattr *va = ap->a_vap; 1437 struct vnode **vpp = ap->a_vpp; 1438 struct ucred *cred = cnp->cn_cred; 1439 struct proc *p = cnp->cn_proc; 1440 /* locals */ 1441 int error; 1442 const char *nm = cnp->cn_nameptr; 1443 int len = cnp->cn_namelen; 1444 struct cnode *cp; 1445 ViceFid VFid; 1446 struct vattr ova; 1447 1448 MARK_ENTRY(CODA_MKDIR_STATS); 1449 1450 /* Check for mkdir of target object. */ 1451 if (IS_CTL_NAME(dvp, nm, len)) { 1452 *vpp = (struct vnode *)0; 1453 MARK_INT_FAIL(CODA_MKDIR_STATS); 1454 return(EACCES); 1455 } 1456 1457 if (len+1 > CODA_MAXNAMLEN) { 1458 *vpp = (struct vnode *)0; 1459 MARK_INT_FAIL(CODA_MKDIR_STATS); 1460 return(EACCES); 1461 } 1462 1463 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, p, &VFid, &ova); 1464 1465 if (!error) { 1466 if (coda_find(&VFid) != NULL) 1467 panic("cnode existed for newly created directory!"); 1468 1469 1470 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); 1471 *vpp = CTOV(cp); 1472 1473 /* enter the new vnode in the Name Cache */ 1474 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1475 1476 /* as a side effect, enter "." and ".." for the directory */ 1477 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); 1478 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); 1479 1480 if (coda_attr_cache) { 1481 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ 1482 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ 1483 } 1484 1485 /* Invalidate the parent's attr cache, the modification time has changed */ 1486 VTOC(dvp)->c_flags &= ~C_VATTR; 1487 1488 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n", 1489 VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 1490 } else { 1491 *vpp = (struct vnode *)0; 1492 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));) 1493 } 1494 1495 /* 1496 * Currently, all mkdirs explicitly vput their dvp's. 1497 * It also appears that we *must* lock the vpp, since 1498 * lockleaf isn't set, but someone down the road is going 1499 * to try to unlock the new directory. 1500 */ 1501 vput(dvp); 1502 if (!error) { 1503 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1504 panic("coda_mkdir: couldn't lock child"); 1505 } 1506 } 1507 1508 /* Have to free the previously saved name */ 1509 /* 1510 * ufs_mkdir doesn't check for SAVESTART before freeing the 1511 * pathname buffer, but ufs_create does. For the moment, I'll 1512 * follow their lead, but this seems like it is probably 1513 * incorrect. 1514 */ 1515 FREE(cnp->cn_pnbuf, M_NAMEI); 1516 return(error); 1517 } 1518 1519 int 1520 coda_rmdir(v) 1521 void *v; 1522 { 1523 /* true args */ 1524 struct vop_rmdir_args *ap = v; 1525 struct vnode *dvp = ap->a_dvp; 1526 struct cnode *dcp = VTOC(dvp); 1527 struct componentname *cnp = ap->a_cnp; 1528 struct ucred *cred = cnp->cn_cred; 1529 struct proc *p = cnp->cn_proc; 1530 /* true args */ 1531 int error; 1532 const char *nm = cnp->cn_nameptr; 1533 int len = cnp->cn_namelen; 1534 struct cnode *cp; 1535 1536 MARK_ENTRY(CODA_RMDIR_STATS); 1537 1538 /* Check for rmdir of control object. */ 1539 if (IS_CTL_NAME(dvp, nm, len)) { 1540 MARK_INT_FAIL(CODA_RMDIR_STATS); 1541 return(ENOENT); 1542 } 1543 1544 /* We're being conservative here, it might be that this person 1545 * doesn't really have sufficient access to delete the file 1546 * but we feel zapping the entry won't really hurt anyone -- dcs 1547 */ 1548 /* 1549 * As a side effect of the rmdir, remove any entries for children of 1550 * the directory, especially "." and "..". 1551 */ 1552 cp = coda_nc_lookup(dcp, nm, len, cred); 1553 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); 1554 1555 /* Remove the file's entry from the CODA Name Cache */ 1556 coda_nc_zapfile(dcp, nm, len); 1557 1558 /* Invalidate the parent's attr cache, the modification time has changed */ 1559 dcp->c_flags &= ~C_VATTR; 1560 1561 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, p); 1562 1563 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) 1564 1565 /* 1566 * regardless of what happens, we need to drop locks/refs on the 1567 * parent and child. I think. 1568 */ 1569 if (dvp == ap->a_vp) { 1570 vrele(ap->a_vp); 1571 } else { 1572 vput(ap->a_vp); 1573 } 1574 vput(dvp); 1575 1576 if ((cnp->cn_flags & SAVESTART) == 0) { 1577 FREE(cnp->cn_pnbuf, M_NAMEI); 1578 } 1579 return(error); 1580 } 1581 1582 int 1583 coda_symlink(v) 1584 void *v; 1585 { 1586 /* true args */ 1587 struct vop_symlink_args *ap = v; 1588 struct vnode *tdvp = ap->a_dvp; 1589 struct cnode *tdcp = VTOC(tdvp); 1590 struct componentname *cnp = ap->a_cnp; 1591 struct vattr *tva = ap->a_vap; 1592 char *path = ap->a_target; 1593 struct ucred *cred = cnp->cn_cred; 1594 struct proc *p = cnp->cn_proc; 1595 /* locals */ 1596 int error; 1597 /* 1598 * XXX I'm assuming the following things about coda_symlink's 1599 * arguments: 1600 * t(foo) is the new name/parent/etc being created. 1601 * lname is the contents of the new symlink. 1602 */ 1603 const char *nm = cnp->cn_nameptr; 1604 int len = cnp->cn_namelen; 1605 int plen = strlen(path); 1606 1607 /* XXX What about the vpp argument? Do we need it? */ 1608 /* 1609 * Here's the strategy for the moment: perform the symlink, then 1610 * do a lookup to grab the resulting vnode. I know this requires 1611 * two communications with Venus for a new sybolic link, but 1612 * that's the way the ball bounces. I don't yet want to change 1613 * the way the Mach symlink works. When Mach support is 1614 * deprecated, we should change symlink so that the common case 1615 * returns the resultant vnode in a vpp argument. 1616 */ 1617 1618 MARK_ENTRY(CODA_SYMLINK_STATS); 1619 1620 /* Check for symlink of control object. */ 1621 if (IS_CTL_NAME(tdvp, nm, len)) { 1622 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1623 return(EACCES); 1624 } 1625 1626 if (plen+1 > CODA_MAXPATHLEN) { 1627 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1628 return(EINVAL); 1629 } 1630 1631 if (len+1 > CODA_MAXNAMLEN) { 1632 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1633 error = EINVAL; 1634 goto exit; 1635 } 1636 1637 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, p); 1638 1639 /* Invalidate the parent's attr cache, the modification time has changed */ 1640 tdcp->c_flags &= ~C_VATTR; 1641 1642 if (!error) 1643 { 1644 struct nameidata nd; 1645 NDINIT(&nd, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, nm, p); 1646 nd.ni_cnd.cn_cred = cred; 1647 nd.ni_loopcnt = 0; 1648 nd.ni_startdir = tdvp; 1649 nd.ni_cnd.cn_pnbuf = (char *)nm; 1650 nd.ni_cnd.cn_nameptr = nd.ni_cnd.cn_pnbuf; 1651 nd.ni_pathlen = len; 1652 vput(tdvp); 1653 error = lookup(&nd); 1654 *ap->a_vpp = nd.ni_vp; 1655 } 1656 1657 /* 1658 * Okay, now we have to drop locks on dvp. vpp is unlocked, but 1659 * ref'd. It doesn't matter what happens in either symlink or 1660 * lookup. Furthermore, there isn't any way for (dvp == *vpp), so 1661 * we don't bother checking. 1662 */ 1663 /* vput(ap->a_dvp); released earlier */ 1664 if (*ap->a_vpp) { 1665 VOP_UNLOCK(*ap->a_vpp, 0); /* this line is new!! It is necessary because lookup() calls 1666 VOP_LOOKUP (coda_lookup) which returns vpp locked. cfs_nb_lookup 1667 merged with coda_lookup() to become coda_lookup so UNLOCK is 1668 necessary */ 1669 vrele(*ap->a_vpp); 1670 } 1671 1672 /* 1673 * Free the name buffer 1674 */ 1675 if ((cnp->cn_flags & SAVESTART) == 0) { 1676 FREE(cnp->cn_pnbuf, M_NAMEI); 1677 } 1678 1679 exit: 1680 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) 1681 return(error); 1682 } 1683 1684 /* 1685 * Read directory entries. 1686 */ 1687 int 1688 coda_readdir(v) 1689 void *v; 1690 { 1691 /* true args */ 1692 struct vop_readdir_args *ap = v; 1693 struct vnode *vp = ap->a_vp; 1694 struct cnode *cp = VTOC(vp); 1695 struct uio *uiop = ap->a_uio; 1696 struct ucred *cred = ap->a_cred; 1697 int *eofflag = ap->a_eofflag; 1698 off_t **cookies = ap->a_cookies; 1699 int *ncookies = ap->a_ncookies; 1700 struct proc *p = ap->a_uio->uio_procp; 1701 /* upcall decl */ 1702 /* locals */ 1703 int error = 0; 1704 1705 MARK_ENTRY(CODA_READDIR_STATS); 1706 1707 CODADEBUG(CODA_READDIR, myprintf(("coda_readdir(%p, %lu, %lld, %d)\n", uiop->uio_iov->iov_base, (unsigned long) uiop->uio_resid, (long long) uiop->uio_offset, uiop->uio_segflg)); ) 1708 1709 /* Check for readdir of control object. */ 1710 if (IS_CTL_VP(vp)) { 1711 MARK_INT_FAIL(CODA_READDIR_STATS); 1712 return(ENOENT); 1713 } 1714 1715 { 1716 /* Redirect the request to UFS. */ 1717 1718 /* If directory is not already open do an "internal open" on it. */ 1719 int opened_internally = 0; 1720 if (cp->c_ovp == NULL) { 1721 opened_internally = 1; 1722 MARK_INT_GEN(CODA_OPEN_STATS); 1723 error = VOP_OPEN(vp, FREAD, cred, p); 1724 #ifdef CODA_VERBOSE 1725 printf("coda_readdir: Internally Opening %p\n", vp); 1726 #endif 1727 if (error) return(error); 1728 } 1729 1730 /* Have UFS handle the call. */ 1731 CODADEBUG(CODA_READDIR, myprintf(("indirect readdir: fid = (%lx.%lx.%lx), refcnt = %ld\n",cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique, vp->v_usecount)); ) 1732 error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, cookies, 1733 ncookies); 1734 if (error) 1735 MARK_INT_FAIL(CODA_READDIR_STATS); 1736 else 1737 MARK_INT_SAT(CODA_READDIR_STATS); 1738 1739 /* Do an "internal close" if necessary. */ 1740 if (opened_internally) { 1741 MARK_INT_GEN(CODA_CLOSE_STATS); 1742 (void)VOP_CLOSE(vp, FREAD, cred, p); 1743 } 1744 } 1745 1746 return(error); 1747 } 1748 1749 /* 1750 * Convert from file system blocks to device blocks 1751 */ 1752 int 1753 coda_bmap(v) 1754 void *v; 1755 { 1756 /* XXX on the global proc */ 1757 /* true args */ 1758 struct vop_bmap_args *ap = v; 1759 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */ 1760 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */ 1761 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */ 1762 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */ 1763 struct proc *p __attribute__((unused)) = curproc; 1764 /* upcall decl */ 1765 /* locals */ 1766 1767 *vpp = (struct vnode *)0; 1768 myprintf(("coda_bmap called!\n")); 1769 return(EINVAL); 1770 } 1771 1772 /* 1773 * I don't think the following two things are used anywhere, so I've 1774 * commented them out 1775 * 1776 * struct buf *async_bufhead; 1777 * int async_daemon_count; 1778 */ 1779 int 1780 coda_strategy(v) 1781 void *v; 1782 { 1783 /* true args */ 1784 struct vop_strategy_args *ap = v; 1785 struct buf *bp __attribute__((unused)) = ap->a_bp; 1786 struct proc *p __attribute__((unused)) = curproc; 1787 /* upcall decl */ 1788 /* locals */ 1789 1790 myprintf(("coda_strategy called! ")); 1791 return(EINVAL); 1792 } 1793 1794 int 1795 coda_reclaim(v) 1796 void *v; 1797 { 1798 /* true args */ 1799 struct vop_reclaim_args *ap = v; 1800 struct vnode *vp = ap->a_vp; 1801 struct cnode *cp = VTOC(vp); 1802 /* upcall decl */ 1803 /* locals */ 1804 1805 /* 1806 * Forced unmount/flush will let vnodes with non zero use be destroyed! 1807 */ 1808 ENTRY; 1809 1810 if (IS_UNMOUNTING(cp)) { 1811 #ifdef DEBUG 1812 if (VTOC(vp)->c_ovp) { 1813 if (IS_UNMOUNTING(cp)) 1814 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp); 1815 } 1816 #endif 1817 } else { 1818 #ifdef OLD_DIAGNOSTIC 1819 if (vp->v_usecount != 0) 1820 print("coda_reclaim: pushing active %p\n", vp); 1821 if (VTOC(vp)->c_ovp) { 1822 panic("coda_reclaim: c_ovp not void"); 1823 } 1824 #endif 1825 } 1826 cache_purge(vp); 1827 coda_free(VTOC(vp)); 1828 VTOC(vp) = NULL; 1829 return (0); 1830 } 1831 1832 int 1833 coda_lock(v) 1834 void *v; 1835 { 1836 /* true args */ 1837 struct vop_lock_args *ap = v; 1838 struct vnode *vp = ap->a_vp; 1839 struct cnode *cp = VTOC(vp); 1840 /* upcall decl */ 1841 /* locals */ 1842 1843 ENTRY; 1844 1845 if (coda_lockdebug) { 1846 myprintf(("Attempting lock on %lx.%lx.%lx\n", 1847 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1848 } 1849 1850 return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock)); 1851 } 1852 1853 int 1854 coda_unlock(v) 1855 void *v; 1856 { 1857 /* true args */ 1858 struct vop_unlock_args *ap = v; 1859 struct vnode *vp = ap->a_vp; 1860 struct cnode *cp = VTOC(vp); 1861 /* upcall decl */ 1862 /* locals */ 1863 1864 ENTRY; 1865 if (coda_lockdebug) { 1866 myprintf(("Attempting unlock on %lx.%lx.%lx\n", 1867 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1868 } 1869 1870 return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock)); 1871 } 1872 1873 int 1874 coda_islocked(v) 1875 void *v; 1876 { 1877 /* true args */ 1878 struct vop_islocked_args *ap = v; 1879 ENTRY; 1880 1881 return (lockstatus(&ap->a_vp->v_lock)); 1882 } 1883 1884 /* How one looks up a vnode given a device/inode pair: */ 1885 int 1886 coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp) 1887 { 1888 /* This is like VFS_VGET() or igetinode()! */ 1889 int error; 1890 struct mount *mp; 1891 1892 if (!(mp = devtomp(dev))) { 1893 myprintf(("coda_grab_vnode: devtomp(%d) returns NULL\n", dev)); 1894 return(ENXIO); 1895 } 1896 1897 /* XXX - ensure that nonzero-return means failure */ 1898 error = VFS_VGET(mp,ino,vpp); 1899 if (error) { 1900 myprintf(("coda_grab_vnode: iget/vget(%d, %d) returns %p, err %d\n", 1901 dev, ino, *vpp, error)); 1902 return(ENOENT); 1903 } 1904 return(0); 1905 } 1906 1907 void 1908 print_vattr( attr ) 1909 struct vattr *attr; 1910 { 1911 char *typestr; 1912 1913 switch (attr->va_type) { 1914 case VNON: 1915 typestr = "VNON"; 1916 break; 1917 case VREG: 1918 typestr = "VREG"; 1919 break; 1920 case VDIR: 1921 typestr = "VDIR"; 1922 break; 1923 case VBLK: 1924 typestr = "VBLK"; 1925 break; 1926 case VCHR: 1927 typestr = "VCHR"; 1928 break; 1929 case VLNK: 1930 typestr = "VLNK"; 1931 break; 1932 case VSOCK: 1933 typestr = "VSCK"; 1934 break; 1935 case VFIFO: 1936 typestr = "VFFO"; 1937 break; 1938 case VBAD: 1939 typestr = "VBAD"; 1940 break; 1941 default: 1942 typestr = "????"; 1943 break; 1944 } 1945 1946 1947 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", 1948 typestr, (int)attr->va_mode, (int)attr->va_uid, 1949 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); 1950 1951 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", 1952 (int)attr->va_fileid, (int)attr->va_nlink, 1953 (int)attr->va_size, 1954 (int)attr->va_blocksize,(int)attr->va_bytes)); 1955 myprintf((" gen %ld flags %ld vaflags %d\n", 1956 attr->va_gen, attr->va_flags, attr->va_vaflags)); 1957 myprintf((" atime sec %d nsec %d\n", 1958 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); 1959 myprintf((" mtime sec %d nsec %d\n", 1960 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); 1961 myprintf((" ctime sec %d nsec %d\n", 1962 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); 1963 } 1964 1965 /* How to print a ucred */ 1966 void 1967 print_cred(cred) 1968 struct ucred *cred; 1969 { 1970 1971 int i; 1972 1973 myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid)); 1974 1975 for (i=0; i < cred->cr_ngroups; i++) 1976 myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i])); 1977 myprintf(("\n")); 1978 1979 } 1980 1981 /* 1982 * Return a vnode for the given fid. 1983 * If no cnode exists for this fid create one and put it 1984 * in a table hashed by fid.Volume and fid.Vnode. If the cnode for 1985 * this fid is already in the table return it (ref count is 1986 * incremented by coda_find. The cnode will be flushed from the 1987 * table when coda_inactive calls coda_unsave. 1988 */ 1989 struct cnode * 1990 make_coda_node(fid, vfsp, type) 1991 ViceFid *fid; struct mount *vfsp; short type; 1992 { 1993 struct cnode *cp; 1994 int err; 1995 1996 if ((cp = coda_find(fid)) == NULL) { 1997 struct vnode *vp; 1998 1999 cp = coda_alloc(); 2000 cp->c_fid = *fid; 2001 2002 err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp); 2003 if (err) { 2004 panic("coda: getnewvnode returned error %d\n", err); 2005 } 2006 vp->v_data = cp; 2007 vp->v_type = type; 2008 cp->c_vnode = vp; 2009 coda_save(cp); 2010 2011 } else { 2012 vref(CTOV(cp)); 2013 } 2014 2015 return cp; 2016 } 2017
Indexes created Tue Oct 14 21:09:58 GMT 2025