coda_vnops.c revision 1.23.2.9
1 /* 2 coda_create/vn_open 3 remove/unlink 4 link 5 mkdir 6 rmdir 7 symlink 8 */ 9 /* $NetBSD: coda_vnops.c,v 1.23.2.9 2002/10/18 02:40:55 nathanw 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/cdefs.h> 57 __KERNEL_RCSID(0, "$NetBSD: coda_vnops.c,v 1.23.2.9 2002/10/18 02:40:55 nathanw Exp $"); 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/malloc.h> 62 #include <sys/errno.h> 63 #include <sys/acct.h> 64 #include <sys/file.h> 65 #include <sys/uio.h> 66 #include <sys/namei.h> 67 #include <sys/ioctl.h> 68 #include <sys/mount.h> 69 #include <sys/proc.h> 70 #include <sys/select.h> 71 #include <sys/user.h> 72 #include <miscfs/genfs/genfs.h> 73 74 #include <coda/coda.h> 75 #include <coda/cnode.h> 76 #include <coda/coda_vnops.h> 77 #include <coda/coda_venus.h> 78 #include <coda/coda_opstats.h> 79 #include <coda/coda_subr.h> 80 #include <coda/coda_namecache.h> 81 #include <coda/coda_pioctl.h> 82 83 /* 84 * These flags select various performance enhancements. 85 */ 86 int coda_attr_cache = 1; /* Set to cache attributes in the kernel */ 87 int coda_symlink_cache = 1; /* Set to cache symbolic link information */ 88 int coda_access_cache = 1; /* Set to handle some access checks directly */ 89 90 /* structure to keep track of vfs calls */ 91 92 struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE]; 93 94 #define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++) 95 #define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++) 96 #define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++) 97 #define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++) 98 99 /* What we are delaying for in printf */ 100 int coda_printf_delay = 0; /* in microseconds */ 101 int coda_vnop_print_entry = 0; 102 static int coda_lockdebug = 0; 103 104 /* Definition of the vfs operation vector */ 105 106 /* 107 * Some NetBSD details: 108 * 109 * coda_start is called at the end of the mount syscall. 110 * coda_init is called at boot time. 111 */ 112 113 #define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__func__)) 114 115 /* Definition of the vnode operation vector */ 116 117 const struct vnodeopv_entry_desc coda_vnodeop_entries[] = { 118 { &vop_default_desc, coda_vop_error }, 119 { &vop_lookup_desc, coda_lookup }, /* lookup */ 120 { &vop_create_desc, coda_create }, /* create */ 121 { &vop_mknod_desc, coda_vop_error }, /* mknod */ 122 { &vop_open_desc, coda_open }, /* open */ 123 { &vop_close_desc, coda_close }, /* close */ 124 { &vop_access_desc, coda_access }, /* access */ 125 { &vop_getattr_desc, coda_getattr }, /* getattr */ 126 { &vop_setattr_desc, coda_setattr }, /* setattr */ 127 { &vop_read_desc, coda_read }, /* read */ 128 { &vop_write_desc, coda_write }, /* write */ 129 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 130 { &vop_ioctl_desc, coda_ioctl }, /* ioctl */ 131 /* 1.3 { &vop_select_desc, coda_select }, select */ 132 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 133 { &vop_fsync_desc, coda_fsync }, /* fsync */ 134 { &vop_remove_desc, coda_remove }, /* remove */ 135 { &vop_link_desc, coda_link }, /* link */ 136 { &vop_rename_desc, coda_rename }, /* rename */ 137 { &vop_mkdir_desc, coda_mkdir }, /* mkdir */ 138 { &vop_rmdir_desc, coda_rmdir }, /* rmdir */ 139 { &vop_symlink_desc, coda_symlink }, /* symlink */ 140 { &vop_readdir_desc, coda_readdir }, /* readdir */ 141 { &vop_readlink_desc, coda_readlink }, /* readlink */ 142 { &vop_abortop_desc, coda_abortop }, /* abortop */ 143 { &vop_inactive_desc, coda_inactive }, /* inactive */ 144 { &vop_reclaim_desc, coda_reclaim }, /* reclaim */ 145 { &vop_lock_desc, coda_lock }, /* lock */ 146 { &vop_unlock_desc, coda_unlock }, /* unlock */ 147 { &vop_bmap_desc, coda_bmap }, /* bmap */ 148 { &vop_strategy_desc, coda_strategy }, /* strategy */ 149 { &vop_print_desc, coda_vop_error }, /* print */ 150 { &vop_islocked_desc, coda_islocked }, /* islocked */ 151 { &vop_pathconf_desc, coda_vop_error }, /* pathconf */ 152 { &vop_advlock_desc, coda_vop_nop }, /* advlock */ 153 { &vop_bwrite_desc, coda_vop_error }, /* bwrite */ 154 { &vop_lease_desc, coda_vop_nop }, /* lease */ 155 { &vop_blkatoff_desc, coda_vop_error }, /* blkatoff */ 156 { &vop_valloc_desc, coda_vop_error }, /* valloc */ 157 { &vop_vfree_desc, coda_vop_error }, /* vfree */ 158 { &vop_truncate_desc, coda_vop_error }, /* truncate */ 159 { &vop_update_desc, coda_vop_error }, /* update */ 160 { &vop_seek_desc, genfs_seek }, /* seek */ 161 { &vop_poll_desc, genfs_poll }, /* poll */ 162 { &vop_getpages_desc, coda_getpages }, /* getpages */ 163 { &vop_putpages_desc, coda_putpages }, /* putpages */ 164 { NULL, NULL } 165 }; 166 167 const struct vnodeopv_desc coda_vnodeop_opv_desc = 168 { &coda_vnodeop_p, coda_vnodeop_entries }; 169 170 /* Definitions of NetBSD vnodeop interfaces */ 171 172 /* A generic panic: we were called with something we didn't define yet */ 173 int 174 coda_vop_error(void *anon) { 175 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 176 177 myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n", 178 (*desc)->vdesc_name)); 179 /* 180 panic("coda_nbsd_vop_error"); 181 return 0; 182 */ 183 return EIO; 184 } 185 186 /* A generic do-nothing. For lease_check, advlock */ 187 int 188 coda_vop_nop(void *anon) { 189 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 190 191 if (codadebug) { 192 myprintf(("Vnode operation %s called, but unsupported\n", 193 (*desc)->vdesc_name)); 194 } 195 return (0); 196 } 197 198 int 199 coda_vnodeopstats_init(void) 200 { 201 int i; 202 203 for(i=0;i<CODA_VNODEOPS_SIZE;i++) { 204 coda_vnodeopstats[i].opcode = i; 205 coda_vnodeopstats[i].entries = 0; 206 coda_vnodeopstats[i].sat_intrn = 0; 207 coda_vnodeopstats[i].unsat_intrn = 0; 208 coda_vnodeopstats[i].gen_intrn = 0; 209 } 210 211 return 0; 212 } 213 214 /* 215 * coda_open calls Venus to return the device, inode pair of the cache 216 * file holding the data. Using iget, coda_open finds the vnode of the 217 * cache file, and then opens it. 218 */ 219 int 220 coda_open(v) 221 void *v; 222 { 223 /* 224 * NetBSD can pass the O_EXCL flag in mode, even though the check 225 * has already happened. Venus defensively assumes that if open 226 * is passed the EXCL, it must be a bug. We strip the flag here. 227 */ 228 /* true args */ 229 struct vop_open_args *ap = v; 230 struct vnode **vpp = &(ap->a_vp); 231 struct cnode *cp = VTOC(*vpp); 232 int flag = ap->a_mode & (~O_EXCL); 233 struct ucred *cred = ap->a_cred; 234 struct proc *p = ap->a_p; 235 /* locals */ 236 int error; 237 struct vnode *vp; 238 dev_t dev; 239 ino_t inode; 240 241 MARK_ENTRY(CODA_OPEN_STATS); 242 243 /* Check for open of control file. */ 244 if (IS_CTL_VP(*vpp)) { 245 /* XXX */ 246 /* if (WRITEABLE(flag)) */ 247 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) { 248 MARK_INT_FAIL(CODA_OPEN_STATS); 249 return(EACCES); 250 } 251 MARK_INT_SAT(CODA_OPEN_STATS); 252 return(0); 253 } 254 255 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, p, &dev, &inode); 256 if (error) 257 return (error); 258 if (!error) { 259 CODADEBUG( CODA_OPEN,myprintf(("open: dev %d inode %d result %d\n", 260 dev, inode, error)); ) 261 } 262 263 /* Translate the <device, inode> pair for the cache file into 264 an inode pointer. */ 265 error = coda_grab_vnode(dev, inode, &vp); 266 if (error) 267 return (error); 268 269 /* We get the vnode back locked in both Mach and NetBSD. Needs unlocked */ 270 VOP_UNLOCK(vp, 0); 271 /* Keep a reference until the close comes in. */ 272 vref(*vpp); 273 274 /* Save the vnode pointer for the cache file. */ 275 if (cp->c_ovp == NULL) { 276 cp->c_ovp = vp; 277 } else { 278 if (cp->c_ovp != vp) 279 panic("coda_open: cp->c_ovp != ITOV(ip)"); 280 } 281 cp->c_ocount++; 282 283 /* Flush the attribute cached if writing the file. */ 284 if (flag & FWRITE) { 285 cp->c_owrite++; 286 cp->c_flags &= ~C_VATTR; 287 } 288 289 /* Save the <device, inode> pair for the cache file to speed 290 up subsequent page_read's. */ 291 cp->c_device = dev; 292 cp->c_inode = inode; 293 294 /* Open the cache file. */ 295 error = VOP_OPEN(vp, flag, cred, p); 296 return(error); 297 } 298 299 /* 300 * Close the cache file used for I/O and notify Venus. 301 */ 302 int 303 coda_close(v) 304 void *v; 305 { 306 /* true args */ 307 struct vop_close_args *ap = v; 308 struct vnode *vp = ap->a_vp; 309 struct cnode *cp = VTOC(vp); 310 int flag = ap->a_fflag; 311 struct ucred *cred = ap->a_cred; 312 struct proc *p = ap->a_p; 313 /* locals */ 314 int error; 315 316 MARK_ENTRY(CODA_CLOSE_STATS); 317 318 /* Check for close of control file. */ 319 if (IS_CTL_VP(vp)) { 320 MARK_INT_SAT(CODA_CLOSE_STATS); 321 return(0); 322 } 323 324 if (IS_UNMOUNTING(cp)) { 325 if (cp->c_ovp) { 326 #ifdef CODA_VERBOSE 327 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n", 328 vp->v_usecount, cp->c_ovp, vp, cp); 329 #endif 330 #ifdef hmm 331 vgone(cp->c_ovp); 332 #else 333 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY); 334 VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 335 vput(cp->c_ovp); 336 #endif 337 } else { 338 #ifdef CODA_VERBOSE 339 printf("coda_close: NO container vp %p/cp %p\n", vp, cp); 340 #endif 341 } 342 return ENODEV; 343 } else { 344 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY); 345 VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 346 vput(cp->c_ovp); 347 } 348 349 if (--cp->c_ocount == 0) 350 cp->c_ovp = NULL; 351 352 if (flag & FWRITE) /* file was opened for write */ 353 --cp->c_owrite; 354 355 error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, p); 356 vrele(CTOV(cp)); 357 358 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); ) 359 return(error); 360 } 361 362 int 363 coda_read(v) 364 void *v; 365 { 366 struct vop_read_args *ap = v; 367 368 ENTRY; 369 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ, 370 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 371 } 372 373 int 374 coda_write(v) 375 void *v; 376 { 377 struct vop_write_args *ap = v; 378 379 ENTRY; 380 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE, 381 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 382 } 383 384 int 385 coda_rdwr(vp, uiop, rw, ioflag, cred, p) 386 struct vnode *vp; 387 struct uio *uiop; 388 enum uio_rw rw; 389 int ioflag; 390 struct ucred *cred; 391 struct proc *p; 392 { 393 /* upcall decl */ 394 /* NOTE: container file operation!!! */ 395 /* locals */ 396 struct cnode *cp = VTOC(vp); 397 struct vnode *cfvp = cp->c_ovp; 398 int igot_internally = 0; 399 int opened_internally = 0; 400 int error = 0; 401 402 MARK_ENTRY(CODA_RDWR_STATS); 403 404 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %lu, %lld, %d)\n", rw, 405 uiop->uio_iov->iov_base, 406 (unsigned long) uiop->uio_resid, 407 (long long) uiop->uio_offset, uiop->uio_segflg)); ) 408 409 /* Check for rdwr of control object. */ 410 if (IS_CTL_VP(vp)) { 411 MARK_INT_FAIL(CODA_RDWR_STATS); 412 return(EINVAL); 413 } 414 415 /* Redirect the request to UFS. */ 416 417 /* 418 * If file is not already open this must be a page 419 * {read,write} request. Iget the cache file's inode 420 * pointer if we still have its <device, inode> pair. 421 * Otherwise, we must do an internal open to derive the 422 * pair. 423 */ 424 if (cfvp == NULL) { 425 /* 426 * If we're dumping core, do the internal open. Otherwise 427 * venus won't have the correct size of the core when 428 * it's completely written. 429 */ 430 if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 431 igot_internally = 1; 432 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp); 433 if (error) { 434 MARK_INT_FAIL(CODA_RDWR_STATS); 435 return(error); 436 } 437 /* 438 * We get the vnode back locked in both Mach and 439 * NetBSD. Needs unlocked 440 */ 441 VOP_UNLOCK(cfvp, 0); 442 } 443 else { 444 opened_internally = 1; 445 MARK_INT_GEN(CODA_OPEN_STATS); 446 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), 447 cred, p); 448 #ifdef CODA_VERBOSE 449 printf("coda_rdwr: Internally Opening %p\n", vp); 450 #endif 451 if (error) { 452 MARK_INT_FAIL(CODA_RDWR_STATS); 453 return(error); 454 } 455 cfvp = cp->c_ovp; 456 } 457 } 458 459 /* Have UFS handle the call. */ 460 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n", 461 cp->c_fid.Volume, cp->c_fid.Vnode, 462 cp->c_fid.Unique, CTOV(cp)->v_usecount)); ) 463 464 if (rw == UIO_READ) { 465 error = VOP_READ(cfvp, uiop, ioflag, cred); 466 } else { 467 error = VOP_WRITE(cfvp, uiop, ioflag, cred); 468 } 469 470 if (error) 471 MARK_INT_FAIL(CODA_RDWR_STATS); 472 else 473 MARK_INT_SAT(CODA_RDWR_STATS); 474 475 /* Do an internal close if necessary. */ 476 if (opened_internally) { 477 MARK_INT_GEN(CODA_CLOSE_STATS); 478 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, p); 479 } 480 481 /* Invalidate cached attributes if writing. */ 482 if (rw == UIO_WRITE) 483 cp->c_flags &= ~C_VATTR; 484 return(error); 485 } 486 487 int 488 coda_ioctl(v) 489 void *v; 490 { 491 /* true args */ 492 struct vop_ioctl_args *ap = v; 493 struct vnode *vp = ap->a_vp; 494 int com = ap->a_command; 495 caddr_t data = ap->a_data; 496 int flag = ap->a_fflag; 497 struct ucred *cred = ap->a_cred; 498 struct proc *p = ap->a_p; 499 /* locals */ 500 int error; 501 struct vnode *tvp; 502 struct nameidata ndp; 503 struct PioctlData *iap = (struct PioctlData *)data; 504 505 MARK_ENTRY(CODA_IOCTL_STATS); 506 507 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));) 508 509 /* Don't check for operation on a dying object, for ctlvp it 510 shouldn't matter */ 511 512 /* Must be control object to succeed. */ 513 if (!IS_CTL_VP(vp)) { 514 MARK_INT_FAIL(CODA_IOCTL_STATS); 515 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));) 516 return (EOPNOTSUPP); 517 } 518 /* Look up the pathname. */ 519 520 /* Should we use the name cache here? It would get it from 521 lookupname sooner or later anyway, right? */ 522 523 NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, ((caddr_t)iap->path), p); 524 error = namei(&ndp); 525 tvp = ndp.ni_vp; 526 527 if (error) { 528 MARK_INT_FAIL(CODA_IOCTL_STATS); 529 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n", 530 error));) 531 return(error); 532 } 533 534 /* 535 * Make sure this is a coda style cnode, but it may be a 536 * different vfsp 537 */ 538 /* XXX: this totally violates the comment about vtagtype in vnode.h */ 539 if (tvp->v_tag != VT_CODA) { 540 vrele(tvp); 541 MARK_INT_FAIL(CODA_IOCTL_STATS); 542 CODADEBUG(CODA_IOCTL, 543 myprintf(("coda_ioctl error: %s not a coda object\n", 544 iap->path));) 545 return(EINVAL); 546 } 547 548 if (iap->vi.in_size > VC_MAXDATASIZE) { 549 vrele(tvp); 550 return(EINVAL); 551 } 552 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, p); 553 554 if (error) 555 MARK_INT_FAIL(CODA_IOCTL_STATS); 556 else 557 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) 558 559 vrele(tvp); 560 return(error); 561 } 562 563 /* 564 * To reduce the cost of a user-level venus;we cache attributes in 565 * the kernel. Each cnode has storage allocated for an attribute. If 566 * c_vattr is valid, return a reference to it. Otherwise, get the 567 * attributes from venus and store them in the cnode. There is some 568 * question if this method is a security leak. But I think that in 569 * order to make this call, the user must have done a lookup and 570 * opened the file, and therefore should already have access. 571 */ 572 int 573 coda_getattr(v) 574 void *v; 575 { 576 /* true args */ 577 struct vop_getattr_args *ap = v; 578 struct vnode *vp = ap->a_vp; 579 struct cnode *cp = VTOC(vp); 580 struct vattr *vap = ap->a_vap; 581 struct ucred *cred = ap->a_cred; 582 struct proc *p = ap->a_p; 583 /* locals */ 584 int error; 585 586 MARK_ENTRY(CODA_GETATTR_STATS); 587 588 /* Check for getattr of control object. */ 589 if (IS_CTL_VP(vp)) { 590 MARK_INT_FAIL(CODA_GETATTR_STATS); 591 return(ENOENT); 592 } 593 594 /* Check to see if the attributes have already been cached */ 595 if (VALID_VATTR(cp)) { 596 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n", 597 cp->c_fid.Volume, 598 cp->c_fid.Vnode, 599 cp->c_fid.Unique));}); 600 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 601 print_vattr(&cp->c_vattr); ); 602 603 *vap = cp->c_vattr; 604 MARK_INT_SAT(CODA_GETATTR_STATS); 605 return(0); 606 } 607 608 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, p, vap); 609 610 if (!error) { 611 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n", 612 cp->c_fid.Volume, 613 cp->c_fid.Vnode, 614 cp->c_fid.Unique, 615 error)); ) 616 617 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 618 print_vattr(vap); ); 619 620 /* If not open for write, store attributes in cnode */ 621 if ((cp->c_owrite == 0) && (coda_attr_cache)) { 622 cp->c_vattr = *vap; 623 cp->c_flags |= C_VATTR; 624 } 625 626 } 627 return(error); 628 } 629 630 int 631 coda_setattr(v) 632 void *v; 633 { 634 /* true args */ 635 struct vop_setattr_args *ap = v; 636 struct vnode *vp = ap->a_vp; 637 struct cnode *cp = VTOC(vp); 638 struct vattr *vap = ap->a_vap; 639 struct ucred *cred = ap->a_cred; 640 struct proc *p = ap->a_p; 641 /* locals */ 642 int error; 643 644 MARK_ENTRY(CODA_SETATTR_STATS); 645 646 /* Check for setattr of control object. */ 647 if (IS_CTL_VP(vp)) { 648 MARK_INT_FAIL(CODA_SETATTR_STATS); 649 return(ENOENT); 650 } 651 652 if (codadebug & CODADBGMSK(CODA_SETATTR)) { 653 print_vattr(vap); 654 } 655 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, p); 656 657 if (!error) 658 cp->c_flags &= ~C_VATTR; 659 660 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); ) 661 return(error); 662 } 663 664 int 665 coda_access(v) 666 void *v; 667 { 668 /* true args */ 669 struct vop_access_args *ap = v; 670 struct vnode *vp = ap->a_vp; 671 struct cnode *cp = VTOC(vp); 672 int mode = ap->a_mode; 673 struct ucred *cred = ap->a_cred; 674 struct proc *p = ap->a_p; 675 /* locals */ 676 int error; 677 678 MARK_ENTRY(CODA_ACCESS_STATS); 679 680 /* Check for access of control object. Only read access is 681 allowed on it. */ 682 if (IS_CTL_VP(vp)) { 683 /* bogus hack - all will be marked as successes */ 684 MARK_INT_SAT(CODA_ACCESS_STATS); 685 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 686 ? 0 : EACCES); 687 } 688 689 /* 690 * if the file is a directory, and we are checking exec (eg lookup) 691 * access, and the file is in the namecache, then the user must have 692 * lookup access to it. 693 */ 694 if (coda_access_cache) { 695 if ((vp->v_type == VDIR) && (mode & VEXEC)) { 696 if (coda_nc_lookup(cp, ".", 1, cred)) { 697 MARK_INT_SAT(CODA_ACCESS_STATS); 698 return(0); /* it was in the cache */ 699 } 700 } 701 } 702 703 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, p); 704 705 return(error); 706 } 707 708 /* 709 * CODA abort op, called after namei() when a CREATE/DELETE isn't actually 710 * done. If a buffer has been saved in anticipation of a coda_create or 711 * a coda_remove, delete it. 712 */ 713 /* ARGSUSED */ 714 int 715 coda_abortop(v) 716 void *v; 717 { 718 /* true args */ 719 struct vop_abortop_args /* { 720 struct vnode *a_dvp; 721 struct componentname *a_cnp; 722 } */ *ap = v; 723 /* upcall decl */ 724 /* locals */ 725 726 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 727 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 728 return (0); 729 } 730 731 int 732 coda_readlink(v) 733 void *v; 734 { 735 /* true args */ 736 struct vop_readlink_args *ap = v; 737 struct vnode *vp = ap->a_vp; 738 struct cnode *cp = VTOC(vp); 739 struct uio *uiop = ap->a_uio; 740 struct ucred *cred = ap->a_cred; 741 struct proc *p = ap->a_uio->uio_procp; 742 /* locals */ 743 int error; 744 char *str; 745 int len; 746 747 MARK_ENTRY(CODA_READLINK_STATS); 748 749 /* Check for readlink of control object. */ 750 if (IS_CTL_VP(vp)) { 751 MARK_INT_FAIL(CODA_READLINK_STATS); 752 return(ENOENT); 753 } 754 755 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ 756 uiop->uio_rw = UIO_READ; 757 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); 758 if (error) 759 MARK_INT_FAIL(CODA_READLINK_STATS); 760 else 761 MARK_INT_SAT(CODA_READLINK_STATS); 762 return(error); 763 } 764 765 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, p, &str, &len); 766 767 if (!error) { 768 uiop->uio_rw = UIO_READ; 769 error = uiomove(str, len, uiop); 770 771 if (coda_symlink_cache) { 772 cp->c_symlink = str; 773 cp->c_symlen = len; 774 cp->c_flags |= C_SYMLINK; 775 } else 776 CODA_FREE(str, len); 777 } 778 779 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) 780 return(error); 781 } 782 783 int 784 coda_fsync(v) 785 void *v; 786 { 787 /* true args */ 788 struct vop_fsync_args *ap = v; 789 struct vnode *vp = ap->a_vp; 790 struct cnode *cp = VTOC(vp); 791 struct ucred *cred = ap->a_cred; 792 struct proc *p = ap->a_p; 793 /* locals */ 794 struct vnode *convp = cp->c_ovp; 795 int error; 796 797 MARK_ENTRY(CODA_FSYNC_STATS); 798 799 /* Check for fsync on an unmounting object */ 800 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync 801 * after an unmount has been initiated. This is a Bad Thing, 802 * which we have to avoid. Not a legitimate failure for stats. 803 */ 804 if (IS_UNMOUNTING(cp)) { 805 return(ENODEV); 806 } 807 808 /* Check for fsync of control object. */ 809 if (IS_CTL_VP(vp)) { 810 MARK_INT_SAT(CODA_FSYNC_STATS); 811 return(0); 812 } 813 814 if (convp) 815 VOP_FSYNC(convp, cred, MNT_WAIT, 0, 0, p); 816 817 /* 818 * We can expect fsync on any vnode at all if venus is pruging it. 819 * Venus can't very well answer the fsync request, now can it? 820 * Hopefully, it won't have to, because hopefully, venus preserves 821 * the (possibly untrue) invariant that it never purges an open 822 * vnode. Hopefully. 823 */ 824 if (cp->c_flags & C_PURGING) { 825 return(0); 826 } 827 828 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, p); 829 830 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ); 831 return(error); 832 } 833 834 int 835 coda_inactive(v) 836 void *v; 837 { 838 /* XXX - at the moment, inactive doesn't look at cred, and doesn't 839 have a proc pointer. Oops. */ 840 /* true args */ 841 struct vop_inactive_args *ap = v; 842 struct vnode *vp = ap->a_vp; 843 struct cnode *cp = VTOC(vp); 844 struct ucred *cred __attribute__((unused)) = NULL; 845 struct proc *p __attribute__((unused)) = curproc; 846 /* upcall decl */ 847 /* locals */ 848 849 /* We don't need to send inactive to venus - DCS */ 850 MARK_ENTRY(CODA_INACTIVE_STATS); 851 852 if (IS_CTL_VP(vp)) { 853 MARK_INT_SAT(CODA_INACTIVE_STATS); 854 return 0; 855 } 856 857 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n", 858 cp->c_fid.Volume, cp->c_fid.Vnode, 859 cp->c_fid.Unique, vp->v_mount));) 860 861 /* If an array has been allocated to hold the symlink, deallocate it */ 862 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { 863 if (cp->c_symlink == NULL) 864 panic("coda_inactive: null symlink pointer in cnode"); 865 866 CODA_FREE(cp->c_symlink, cp->c_symlen); 867 cp->c_flags &= ~C_SYMLINK; 868 cp->c_symlen = 0; 869 } 870 871 /* Remove it from the table so it can't be found. */ 872 coda_unsave(cp); 873 if (vp->v_mount->mnt_data == NULL) { 874 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); 875 panic("badness in coda_inactive"); 876 } 877 878 if (IS_UNMOUNTING(cp)) { 879 #ifdef DEBUG 880 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp); 881 if (cp->c_ovp != NULL) 882 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n", 883 vp->v_usecount, vp, cp); 884 #endif 885 lockmgr(&vp->v_lock, LK_RELEASE, &vp->v_interlock); 886 } else { 887 #ifdef OLD_DIAGNOSTIC 888 if (CTOV(cp)->v_usecount) { 889 panic("coda_inactive: nonzero reference count"); 890 } 891 if (cp->c_ovp != NULL) { 892 panic("coda_inactive: cp->ovp != NULL"); 893 } 894 #endif 895 VOP_UNLOCK(vp, 0); 896 vgone(vp); 897 } 898 899 MARK_INT_SAT(CODA_INACTIVE_STATS); 900 return(0); 901 } 902 903 /* 904 * Remote file system operations having to do with directory manipulation. 905 */ 906 907 /* 908 * It appears that in NetBSD, lookup is supposed to return the vnode locked 909 */ 910 int 911 coda_lookup(v) 912 void *v; 913 { 914 /* true args */ 915 struct vop_lookup_args *ap = v; 916 struct vnode *dvp = ap->a_dvp; 917 struct cnode *dcp = VTOC(dvp); 918 struct vnode **vpp = ap->a_vpp; 919 /* 920 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest 921 * of the string to xlate, and that we must try to get at least 922 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I 923 * could be wrong. 924 */ 925 struct componentname *cnp = ap->a_cnp; 926 struct ucred *cred = cnp->cn_cred; 927 struct proc *p = cnp->cn_proc; 928 /* locals */ 929 struct cnode *cp; 930 const char *nm = cnp->cn_nameptr; 931 int len = cnp->cn_namelen; 932 ViceFid VFid; 933 int vtype; 934 int error = 0; 935 936 cnp->cn_flags &= ~PDIRUNLOCK; 937 938 MARK_ENTRY(CODA_LOOKUP_STATS); 939 940 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n", 941 nm, dcp->c_fid.Volume, 942 dcp->c_fid.Vnode, dcp->c_fid.Unique));); 943 944 /* Check for lookup of control object. */ 945 if (IS_CTL_NAME(dvp, nm, len)) { 946 *vpp = coda_ctlvp; 947 vref(*vpp); 948 MARK_INT_SAT(CODA_LOOKUP_STATS); 949 goto exit; 950 } 951 952 if (len+1 > CODA_MAXNAMLEN) { 953 MARK_INT_FAIL(CODA_LOOKUP_STATS); 954 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n", 955 dcp->c_fid.Volume, dcp->c_fid.Vnode, 956 dcp->c_fid.Unique, nm));); 957 *vpp = (struct vnode *)0; 958 error = EINVAL; 959 goto exit; 960 } 961 /* First try to look the file up in the cfs name cache */ 962 /* lock the parent vnode? */ 963 cp = coda_nc_lookup(dcp, nm, len, cred); 964 if (cp) { 965 *vpp = CTOV(cp); 966 vref(*vpp); 967 CODADEBUG(CODA_LOOKUP, 968 myprintf(("lookup result %d vpp %p\n",error,*vpp));) 969 } else { 970 971 /* The name wasn't cached, so we need to contact Venus */ 972 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, p, &VFid, &vtype); 973 974 if (error) { 975 MARK_INT_FAIL(CODA_LOOKUP_STATS); 976 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n", 977 dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));) 978 *vpp = (struct vnode *)0; 979 } else { 980 MARK_INT_SAT(CODA_LOOKUP_STATS); 981 CODADEBUG(CODA_LOOKUP, 982 myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n", 983 VFid.Volume, VFid.Vnode, VFid.Unique, vtype, 984 error)); ) 985 986 cp = make_coda_node(&VFid, dvp->v_mount, vtype); 987 *vpp = CTOV(cp); 988 989 /* enter the new vnode in the Name Cache only if the top bit isn't set */ 990 /* And don't enter a new vnode for an invalid one! */ 991 if (!(vtype & CODA_NOCACHE)) 992 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 993 } 994 } 995 996 exit: 997 /* 998 * If we are creating, and this was the last name to be looked up, 999 * and the error was ENOENT, then there really shouldn't be an 1000 * error and we can make the leaf NULL and return success. Since 1001 * this is supposed to work under Mach as well as NetBSD, we're 1002 * leaving this fn wrapped. We also must tell lookup/namei that 1003 * we need to save the last component of the name. (Create will 1004 * have to free the name buffer later...lucky us...) 1005 */ 1006 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) 1007 && (cnp->cn_flags & ISLASTCN) 1008 && (error == ENOENT)) 1009 { 1010 error = EJUSTRETURN; 1011 cnp->cn_flags |= SAVENAME; 1012 *ap->a_vpp = NULL; 1013 } 1014 1015 /* 1016 * If we are removing, and we are at the last element, and we 1017 * found it, then we need to keep the name around so that the 1018 * removal will go ahead as planned. Unfortunately, this will 1019 * probably also lock the to-be-removed vnode, which may or may 1020 * not be a good idea. I'll have to look at the bits of 1021 * coda_remove to make sure. We'll only save the name if we did in 1022 * fact find the name, otherwise coda_remove won't have a chance 1023 * to free the pathname. 1024 */ 1025 if ((cnp->cn_nameiop == DELETE) 1026 && (cnp->cn_flags & ISLASTCN) 1027 && !error) 1028 { 1029 cnp->cn_flags |= SAVENAME; 1030 } 1031 1032 /* 1033 * If the lookup went well, we need to (potentially?) unlock the 1034 * parent, and lock the child. We are only responsible for 1035 * checking to see if the parent is supposed to be unlocked before 1036 * we return. We must always lock the child (provided there is 1037 * one, and (the parent isn't locked or it isn't the same as the 1038 * parent.) Simple, huh? We can never leave the parent locked unless 1039 * we are ISLASTCN 1040 */ 1041 if (!error || (error == EJUSTRETURN)) { 1042 if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) { 1043 if ((error = VOP_UNLOCK(dvp, 0))) { 1044 return error; 1045 } 1046 cnp->cn_flags |= PDIRUNLOCK; 1047 /* 1048 * The parent is unlocked. As long as there is a child, 1049 * lock it without bothering to check anything else. 1050 */ 1051 if (*ap->a_vpp) { 1052 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1053 printf("coda_lookup: "); 1054 panic("unlocked parent but couldn't lock child"); 1055 } 1056 } 1057 } else { 1058 /* The parent is locked, and may be the same as the child */ 1059 if (*ap->a_vpp && (*ap->a_vpp != dvp)) { 1060 /* Different, go ahead and lock it. */ 1061 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1062 printf("coda_lookup: "); 1063 panic("unlocked parent but couldn't lock child"); 1064 } 1065 } 1066 } 1067 } else { 1068 /* If the lookup failed, we need to ensure that the leaf is NULL */ 1069 /* Don't change any locking? */ 1070 *ap->a_vpp = NULL; 1071 } 1072 return(error); 1073 } 1074 1075 /*ARGSUSED*/ 1076 int 1077 coda_create(v) 1078 void *v; 1079 { 1080 /* true args */ 1081 struct vop_create_args *ap = v; 1082 struct vnode *dvp = ap->a_dvp; 1083 struct cnode *dcp = VTOC(dvp); 1084 struct vattr *va = ap->a_vap; 1085 int exclusive = 1; 1086 int mode = ap->a_vap->va_mode; 1087 struct vnode **vpp = ap->a_vpp; 1088 struct componentname *cnp = ap->a_cnp; 1089 struct ucred *cred = cnp->cn_cred; 1090 struct proc *p = cnp->cn_proc; 1091 /* locals */ 1092 int error; 1093 struct cnode *cp; 1094 const char *nm = cnp->cn_nameptr; 1095 int len = cnp->cn_namelen; 1096 ViceFid VFid; 1097 struct vattr attr; 1098 1099 MARK_ENTRY(CODA_CREATE_STATS); 1100 1101 /* All creates are exclusive XXX */ 1102 /* I'm assuming the 'mode' argument is the file mode bits XXX */ 1103 1104 /* Check for create of control object. */ 1105 if (IS_CTL_NAME(dvp, nm, len)) { 1106 *vpp = (struct vnode *)0; 1107 MARK_INT_FAIL(CODA_CREATE_STATS); 1108 return(EACCES); 1109 } 1110 1111 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, p, &VFid, &attr); 1112 1113 if (!error) { 1114 1115 /* If this is an exclusive create, panic if the file already exists. */ 1116 /* Venus should have detected the file and reported EEXIST. */ 1117 1118 if ((exclusive == 1) && 1119 (coda_find(&VFid) != NULL)) 1120 panic("cnode existed for newly created file!"); 1121 1122 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); 1123 *vpp = CTOV(cp); 1124 1125 /* Update va to reflect the new attributes. */ 1126 (*va) = attr; 1127 1128 /* Update the attribute cache and mark it as valid */ 1129 if (coda_attr_cache) { 1130 VTOC(*vpp)->c_vattr = attr; 1131 VTOC(*vpp)->c_flags |= C_VATTR; 1132 } 1133 1134 /* Invalidate the parent's attr cache, the modification time has changed */ 1135 VTOC(dvp)->c_flags &= ~C_VATTR; 1136 1137 /* enter the new vnode in the Name Cache */ 1138 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1139 1140 CODADEBUG(CODA_CREATE, 1141 myprintf(("create: (%lx.%lx.%lx), result %d\n", 1142 VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 1143 } else { 1144 *vpp = (struct vnode *)0; 1145 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));) 1146 } 1147 1148 /* Locking strategy. */ 1149 /* 1150 * In NetBSD, all creates must explicitly vput their dvp's. We'll 1151 * go ahead and use the LOCKLEAF flag of the cnp argument. 1152 * However, I'm pretty sure that create must return the leaf 1153 * locked; so there is a DIAGNOSTIC check to ensure that this is 1154 * true. 1155 */ 1156 vput(dvp); 1157 if (!error) { 1158 if (cnp->cn_flags & LOCKLEAF) { 1159 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1160 printf("coda_create: "); 1161 panic("unlocked parent but couldn't lock child"); 1162 } 1163 } 1164 #ifdef OLD_DIAGNOSTIC 1165 else { 1166 printf("coda_create: LOCKLEAF not set!\n"); 1167 } 1168 #endif 1169 } 1170 /* Have to free the previously saved name */ 1171 /* 1172 * This condition is stolen from ufs_makeinode. I have no idea 1173 * why it's here, but what the hey... 1174 */ 1175 if ((cnp->cn_flags & SAVESTART) == 0) { 1176 PNBUF_PUT(cnp->cn_pnbuf); 1177 } 1178 return(error); 1179 } 1180 1181 int 1182 coda_remove(v) 1183 void *v; 1184 { 1185 /* true args */ 1186 struct vop_remove_args *ap = v; 1187 struct vnode *dvp = ap->a_dvp; 1188 struct cnode *cp = VTOC(dvp); 1189 struct componentname *cnp = ap->a_cnp; 1190 struct ucred *cred = cnp->cn_cred; 1191 struct proc *p = cnp->cn_proc; 1192 /* locals */ 1193 int error; 1194 const char *nm = cnp->cn_nameptr; 1195 int len = cnp->cn_namelen; 1196 struct cnode *tp; 1197 1198 MARK_ENTRY(CODA_REMOVE_STATS); 1199 1200 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n", 1201 nm, cp->c_fid.Volume, cp->c_fid.Vnode, 1202 cp->c_fid.Unique));); 1203 1204 /* Remove the file's entry from the CODA Name Cache */ 1205 /* We're being conservative here, it might be that this person 1206 * doesn't really have sufficient access to delete the file 1207 * but we feel zapping the entry won't really hurt anyone -- dcs 1208 */ 1209 /* I'm gonna go out on a limb here. If a file and a hardlink to it 1210 * exist, and one is removed, the link count on the other will be 1211 * off by 1. We could either invalidate the attrs if cached, or 1212 * fix them. I'll try to fix them. DCS 11/8/94 1213 */ 1214 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); 1215 if (tp) { 1216 if (VALID_VATTR(tp)) { /* If attrs are cached */ 1217 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ 1218 tp->c_vattr.va_nlink--; 1219 } 1220 } 1221 1222 coda_nc_zapfile(VTOC(dvp), nm, len); 1223 /* No need to flush it if it doesn't exist! */ 1224 } 1225 /* Invalidate the parent's attr cache, the modification time has changed */ 1226 VTOC(dvp)->c_flags &= ~C_VATTR; 1227 1228 /* Check for remove of control object. */ 1229 if (IS_CTL_NAME(dvp, nm, len)) { 1230 MARK_INT_FAIL(CODA_REMOVE_STATS); 1231 return(ENOENT); 1232 } 1233 1234 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, p); 1235 1236 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) 1237 1238 /* 1239 * Regardless of what happens, we have to unconditionally drop 1240 * locks/refs on parent and child. (I hope). This is based on 1241 * what ufs_remove seems to be doing. 1242 */ 1243 if (dvp == ap->a_vp) { 1244 vrele(ap->a_vp); 1245 } else { 1246 vput(ap->a_vp); 1247 } 1248 vput(dvp); 1249 1250 if ((cnp->cn_flags & SAVESTART) == 0) { 1251 PNBUF_PUT(cnp->cn_pnbuf); 1252 } 1253 return(error); 1254 } 1255 1256 int 1257 coda_link(v) 1258 void *v; 1259 { 1260 /* true args */ 1261 struct vop_link_args *ap = v; 1262 struct vnode *vp = ap->a_vp; 1263 struct cnode *cp = VTOC(vp); 1264 struct vnode *tdvp = ap->a_dvp; 1265 struct cnode *tdcp = VTOC(tdvp); 1266 struct componentname *cnp = ap->a_cnp; 1267 struct ucred *cred = cnp->cn_cred; 1268 struct proc *p = cnp->cn_proc; 1269 /* locals */ 1270 int error; 1271 const char *nm = cnp->cn_nameptr; 1272 int len = cnp->cn_namelen; 1273 1274 MARK_ENTRY(CODA_LINK_STATS); 1275 1276 if (codadebug & CODADBGMSK(CODA_LINK)) { 1277 1278 myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n", 1279 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1280 myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n", 1281 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 1282 1283 } 1284 if (codadebug & CODADBGMSK(CODA_LINK)) { 1285 myprintf(("link: vp fid: (%lx.%lx.%lx)\n", 1286 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1287 myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n", 1288 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 1289 1290 } 1291 1292 /* Check for link to/from control object. */ 1293 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) { 1294 MARK_INT_FAIL(CODA_LINK_STATS); 1295 return(EACCES); 1296 } 1297 1298 /* 1299 * According to the ufs_link operation here's the locking situation: 1300 * We enter with the thing called "dvp" (the directory) locked. 1301 * We must unconditionally drop locks on "dvp" 1302 * 1303 * We enter with the thing called "vp" (the linked-to) unlocked, 1304 * but ref'd (?) 1305 * We seem to need to lock it before calling coda_link, and 1306 * unconditionally unlock it after. 1307 */ 1308 1309 if ((ap->a_vp != tdvp) && (error = vn_lock(ap->a_vp, LK_EXCLUSIVE))) { 1310 goto exit; 1311 } 1312 1313 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, p); 1314 1315 /* Invalidate the parent's attr cache, the modification time has changed */ 1316 VTOC(tdvp)->c_flags &= ~C_VATTR; 1317 VTOC(vp)->c_flags &= ~C_VATTR; 1318 1319 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) 1320 1321 exit: 1322 1323 if (ap->a_vp != tdvp) { 1324 VOP_UNLOCK(ap->a_vp, 0); 1325 } 1326 vput(tdvp); 1327 1328 /* Drop the name buffer if we don't need to SAVESTART */ 1329 if ((cnp->cn_flags & SAVESTART) == 0) { 1330 PNBUF_PUT(cnp->cn_pnbuf); 1331 } 1332 return(error); 1333 } 1334 1335 int 1336 coda_rename(v) 1337 void *v; 1338 { 1339 /* true args */ 1340 struct vop_rename_args *ap = v; 1341 struct vnode *odvp = ap->a_fdvp; 1342 struct cnode *odcp = VTOC(odvp); 1343 struct componentname *fcnp = ap->a_fcnp; 1344 struct vnode *ndvp = ap->a_tdvp; 1345 struct cnode *ndcp = VTOC(ndvp); 1346 struct componentname *tcnp = ap->a_tcnp; 1347 struct ucred *cred = fcnp->cn_cred; 1348 struct proc *p = fcnp->cn_proc; 1349 /* true args */ 1350 int error; 1351 const char *fnm = fcnp->cn_nameptr; 1352 int flen = fcnp->cn_namelen; 1353 const char *tnm = tcnp->cn_nameptr; 1354 int tlen = tcnp->cn_namelen; 1355 1356 MARK_ENTRY(CODA_RENAME_STATS); 1357 1358 /* Hmmm. The vnodes are already looked up. Perhaps they are locked? 1359 This could be Bad. XXX */ 1360 #ifdef OLD_DIAGNOSTIC 1361 if ((fcnp->cn_cred != tcnp->cn_cred) 1362 || (fcnp->cn_proc != tcnp->cn_proc)) 1363 { 1364 panic("coda_rename: component names don't agree"); 1365 } 1366 #endif 1367 1368 /* Check for rename involving control object. */ 1369 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { 1370 MARK_INT_FAIL(CODA_RENAME_STATS); 1371 return(EACCES); 1372 } 1373 1374 /* Problem with moving directories -- need to flush entry for .. */ 1375 if (odvp != ndvp) { 1376 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); 1377 if (ovcp) { 1378 struct vnode *ovp = CTOV(ovcp); 1379 if ((ovp) && 1380 (ovp->v_type == VDIR)) /* If it's a directory */ 1381 coda_nc_zapfile(VTOC(ovp),"..", 2); 1382 } 1383 } 1384 1385 /* Remove the entries for both source and target files */ 1386 coda_nc_zapfile(VTOC(odvp), fnm, flen); 1387 coda_nc_zapfile(VTOC(ndvp), tnm, tlen); 1388 1389 /* Invalidate the parent's attr cache, the modification time has changed */ 1390 VTOC(odvp)->c_flags &= ~C_VATTR; 1391 VTOC(ndvp)->c_flags &= ~C_VATTR; 1392 1393 if (flen+1 > CODA_MAXNAMLEN) { 1394 MARK_INT_FAIL(CODA_RENAME_STATS); 1395 error = EINVAL; 1396 goto exit; 1397 } 1398 1399 if (tlen+1 > CODA_MAXNAMLEN) { 1400 MARK_INT_FAIL(CODA_RENAME_STATS); 1401 error = EINVAL; 1402 goto exit; 1403 } 1404 1405 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, p); 1406 1407 exit: 1408 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) 1409 /* XXX - do we need to call cache pureg on the moved vnode? */ 1410 cache_purge(ap->a_fvp); 1411 1412 /* It seems to be incumbent on us to drop locks on all four vnodes */ 1413 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ 1414 1415 vrele(ap->a_fvp); 1416 vrele(odvp); 1417 1418 if (ap->a_tvp) { 1419 if (ap->a_tvp == ndvp) { 1420 vrele(ap->a_tvp); 1421 } else { 1422 vput(ap->a_tvp); 1423 } 1424 } 1425 1426 vput(ndvp); 1427 return(error); 1428 } 1429 1430 int 1431 coda_mkdir(v) 1432 void *v; 1433 { 1434 /* true args */ 1435 struct vop_mkdir_args *ap = v; 1436 struct vnode *dvp = ap->a_dvp; 1437 struct cnode *dcp = VTOC(dvp); 1438 struct componentname *cnp = ap->a_cnp; 1439 struct vattr *va = ap->a_vap; 1440 struct vnode **vpp = ap->a_vpp; 1441 struct ucred *cred = cnp->cn_cred; 1442 struct proc *p = cnp->cn_proc; 1443 /* locals */ 1444 int error; 1445 const char *nm = cnp->cn_nameptr; 1446 int len = cnp->cn_namelen; 1447 struct cnode *cp; 1448 ViceFid VFid; 1449 struct vattr ova; 1450 1451 MARK_ENTRY(CODA_MKDIR_STATS); 1452 1453 /* Check for mkdir of target object. */ 1454 if (IS_CTL_NAME(dvp, nm, len)) { 1455 *vpp = (struct vnode *)0; 1456 MARK_INT_FAIL(CODA_MKDIR_STATS); 1457 return(EACCES); 1458 } 1459 1460 if (len+1 > CODA_MAXNAMLEN) { 1461 *vpp = (struct vnode *)0; 1462 MARK_INT_FAIL(CODA_MKDIR_STATS); 1463 return(EACCES); 1464 } 1465 1466 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, p, &VFid, &ova); 1467 1468 if (!error) { 1469 if (coda_find(&VFid) != NULL) 1470 panic("cnode existed for newly created directory!"); 1471 1472 1473 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); 1474 *vpp = CTOV(cp); 1475 1476 /* enter the new vnode in the Name Cache */ 1477 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1478 1479 /* as a side effect, enter "." and ".." for the directory */ 1480 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); 1481 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); 1482 1483 if (coda_attr_cache) { 1484 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ 1485 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ 1486 } 1487 1488 /* Invalidate the parent's attr cache, the modification time has changed */ 1489 VTOC(dvp)->c_flags &= ~C_VATTR; 1490 1491 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n", 1492 VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 1493 } else { 1494 *vpp = (struct vnode *)0; 1495 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));) 1496 } 1497 1498 /* 1499 * Currently, all mkdirs explicitly vput their dvp's. 1500 * It also appears that we *must* lock the vpp, since 1501 * lockleaf isn't set, but someone down the road is going 1502 * to try to unlock the new directory. 1503 */ 1504 vput(dvp); 1505 if (!error) { 1506 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1507 panic("coda_mkdir: couldn't lock child"); 1508 } 1509 } 1510 1511 /* Have to free the previously saved name */ 1512 /* 1513 * ufs_mkdir doesn't check for SAVESTART before freeing the 1514 * pathname buffer, but ufs_create does. For the moment, I'll 1515 * follow their lead, but this seems like it is probably 1516 * incorrect. 1517 */ 1518 PNBUF_PUT(cnp->cn_pnbuf); 1519 return(error); 1520 } 1521 1522 int 1523 coda_rmdir(v) 1524 void *v; 1525 { 1526 /* true args */ 1527 struct vop_rmdir_args *ap = v; 1528 struct vnode *dvp = ap->a_dvp; 1529 struct cnode *dcp = VTOC(dvp); 1530 struct componentname *cnp = ap->a_cnp; 1531 struct ucred *cred = cnp->cn_cred; 1532 struct proc *p = cnp->cn_proc; 1533 /* true args */ 1534 int error; 1535 const char *nm = cnp->cn_nameptr; 1536 int len = cnp->cn_namelen; 1537 struct cnode *cp; 1538 1539 MARK_ENTRY(CODA_RMDIR_STATS); 1540 1541 /* Check for rmdir of control object. */ 1542 if (IS_CTL_NAME(dvp, nm, len)) { 1543 MARK_INT_FAIL(CODA_RMDIR_STATS); 1544 return(ENOENT); 1545 } 1546 1547 /* We're being conservative here, it might be that this person 1548 * doesn't really have sufficient access to delete the file 1549 * but we feel zapping the entry won't really hurt anyone -- dcs 1550 */ 1551 /* 1552 * As a side effect of the rmdir, remove any entries for children of 1553 * the directory, especially "." and "..". 1554 */ 1555 cp = coda_nc_lookup(dcp, nm, len, cred); 1556 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); 1557 1558 /* Remove the file's entry from the CODA Name Cache */ 1559 coda_nc_zapfile(dcp, nm, len); 1560 1561 /* Invalidate the parent's attr cache, the modification time has changed */ 1562 dcp->c_flags &= ~C_VATTR; 1563 1564 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, p); 1565 1566 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) 1567 1568 /* 1569 * regardless of what happens, we need to drop locks/refs on the 1570 * parent and child. I think. 1571 */ 1572 if (dvp == ap->a_vp) { 1573 vrele(ap->a_vp); 1574 } else { 1575 vput(ap->a_vp); 1576 } 1577 vput(dvp); 1578 1579 if ((cnp->cn_flags & SAVESTART) == 0) { 1580 PNBUF_PUT(cnp->cn_pnbuf); 1581 } 1582 return(error); 1583 } 1584 1585 int 1586 coda_symlink(v) 1587 void *v; 1588 { 1589 /* true args */ 1590 struct vop_symlink_args *ap = v; 1591 struct vnode *tdvp = ap->a_dvp; 1592 struct cnode *tdcp = VTOC(tdvp); 1593 struct componentname *cnp = ap->a_cnp; 1594 struct vattr *tva = ap->a_vap; 1595 char *path = ap->a_target; 1596 struct ucred *cred = cnp->cn_cred; 1597 struct proc *p = cnp->cn_proc; 1598 /* locals */ 1599 int error; 1600 /* 1601 * XXX I'm assuming the following things about coda_symlink's 1602 * arguments: 1603 * t(foo) is the new name/parent/etc being created. 1604 * lname is the contents of the new symlink. 1605 */ 1606 const char *nm = cnp->cn_nameptr; 1607 int len = cnp->cn_namelen; 1608 int plen = strlen(path); 1609 1610 /* XXX What about the vpp argument? Do we need it? */ 1611 /* 1612 * Here's the strategy for the moment: perform the symlink, then 1613 * do a lookup to grab the resulting vnode. I know this requires 1614 * two communications with Venus for a new sybolic link, but 1615 * that's the way the ball bounces. I don't yet want to change 1616 * the way the Mach symlink works. When Mach support is 1617 * deprecated, we should change symlink so that the common case 1618 * returns the resultant vnode in a vpp argument. 1619 */ 1620 1621 MARK_ENTRY(CODA_SYMLINK_STATS); 1622 1623 /* Check for symlink of control object. */ 1624 if (IS_CTL_NAME(tdvp, nm, len)) { 1625 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1626 return(EACCES); 1627 } 1628 1629 if (plen+1 > CODA_MAXPATHLEN) { 1630 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1631 return(EINVAL); 1632 } 1633 1634 if (len+1 > CODA_MAXNAMLEN) { 1635 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1636 error = EINVAL; 1637 goto exit; 1638 } 1639 1640 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, p); 1641 1642 /* Invalidate the parent's attr cache, the modification time has changed */ 1643 tdcp->c_flags &= ~C_VATTR; 1644 1645 if (!error) 1646 { 1647 struct nameidata nd; 1648 NDINIT(&nd, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, nm, p); 1649 nd.ni_cnd.cn_cred = cred; 1650 nd.ni_loopcnt = 0; 1651 nd.ni_startdir = tdvp; 1652 nd.ni_cnd.cn_pnbuf = (char *)nm; 1653 nd.ni_cnd.cn_nameptr = nd.ni_cnd.cn_pnbuf; 1654 nd.ni_pathlen = len; 1655 vput(tdvp); 1656 error = lookup(&nd); 1657 *ap->a_vpp = nd.ni_vp; 1658 } 1659 1660 /* 1661 * Free the name buffer 1662 */ 1663 if ((cnp->cn_flags & SAVESTART) == 0) { 1664 PNBUF_PUT(cnp->cn_pnbuf); 1665 } 1666 1667 exit: 1668 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) 1669 return(error); 1670 } 1671 1672 /* 1673 * Read directory entries. 1674 */ 1675 int 1676 coda_readdir(v) 1677 void *v; 1678 { 1679 /* true args */ 1680 struct vop_readdir_args *ap = v; 1681 struct vnode *vp = ap->a_vp; 1682 struct cnode *cp = VTOC(vp); 1683 struct uio *uiop = ap->a_uio; 1684 struct ucred *cred = ap->a_cred; 1685 int *eofflag = ap->a_eofflag; 1686 off_t **cookies = ap->a_cookies; 1687 int *ncookies = ap->a_ncookies; 1688 struct proc *p = ap->a_uio->uio_procp; 1689 /* upcall decl */ 1690 /* locals */ 1691 int error = 0; 1692 1693 MARK_ENTRY(CODA_READDIR_STATS); 1694 1695 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)); ) 1696 1697 /* Check for readdir of control object. */ 1698 if (IS_CTL_VP(vp)) { 1699 MARK_INT_FAIL(CODA_READDIR_STATS); 1700 return(ENOENT); 1701 } 1702 1703 { 1704 /* Redirect the request to UFS. */ 1705 1706 /* If directory is not already open do an "internal open" on it. */ 1707 int opened_internally = 0; 1708 if (cp->c_ovp == NULL) { 1709 opened_internally = 1; 1710 MARK_INT_GEN(CODA_OPEN_STATS); 1711 error = VOP_OPEN(vp, FREAD, cred, p); 1712 #ifdef CODA_VERBOSE 1713 printf("coda_readdir: Internally Opening %p\n", vp); 1714 #endif 1715 if (error) return(error); 1716 } 1717 1718 /* Have UFS handle the call. */ 1719 CODADEBUG(CODA_READDIR, myprintf(("indirect readdir: fid = (%lx.%lx.%lx), refcnt = %d\n",cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique, vp->v_usecount)); ) 1720 error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, cookies, 1721 ncookies); 1722 if (error) 1723 MARK_INT_FAIL(CODA_READDIR_STATS); 1724 else 1725 MARK_INT_SAT(CODA_READDIR_STATS); 1726 1727 /* Do an "internal close" if necessary. */ 1728 if (opened_internally) { 1729 MARK_INT_GEN(CODA_CLOSE_STATS); 1730 (void)VOP_CLOSE(vp, FREAD, cred, p); 1731 } 1732 } 1733 1734 return(error); 1735 } 1736 1737 /* 1738 * Convert from file system blocks to device blocks 1739 */ 1740 int 1741 coda_bmap(v) 1742 void *v; 1743 { 1744 /* XXX on the global proc */ 1745 /* true args */ 1746 struct vop_bmap_args *ap = v; 1747 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */ 1748 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */ 1749 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */ 1750 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */ 1751 struct proc *p __attribute__((unused)) = curproc; 1752 /* upcall decl */ 1753 /* locals */ 1754 1755 *vpp = (struct vnode *)0; 1756 myprintf(("coda_bmap called!\n")); 1757 return(EINVAL); 1758 } 1759 1760 /* 1761 * I don't think the following two things are used anywhere, so I've 1762 * commented them out 1763 * 1764 * struct buf *async_bufhead; 1765 * int async_daemon_count; 1766 */ 1767 int 1768 coda_strategy(v) 1769 void *v; 1770 { 1771 /* true args */ 1772 struct vop_strategy_args *ap = v; 1773 struct buf *bp __attribute__((unused)) = ap->a_bp; 1774 struct proc *p __attribute__((unused)) = curproc; 1775 /* upcall decl */ 1776 /* locals */ 1777 1778 myprintf(("coda_strategy called! ")); 1779 return(EINVAL); 1780 } 1781 1782 int 1783 coda_reclaim(v) 1784 void *v; 1785 { 1786 /* true args */ 1787 struct vop_reclaim_args *ap = v; 1788 struct vnode *vp = ap->a_vp; 1789 struct cnode *cp = VTOC(vp); 1790 /* upcall decl */ 1791 /* locals */ 1792 1793 /* 1794 * Forced unmount/flush will let vnodes with non zero use be destroyed! 1795 */ 1796 ENTRY; 1797 1798 if (IS_UNMOUNTING(cp)) { 1799 #ifdef DEBUG 1800 if (VTOC(vp)->c_ovp) { 1801 if (IS_UNMOUNTING(cp)) 1802 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp); 1803 } 1804 #endif 1805 } else { 1806 #ifdef OLD_DIAGNOSTIC 1807 if (vp->v_usecount != 0) 1808 print("coda_reclaim: pushing active %p\n", vp); 1809 if (VTOC(vp)->c_ovp) { 1810 panic("coda_reclaim: c_ovp not void"); 1811 } 1812 #endif 1813 } 1814 cache_purge(vp); 1815 coda_free(VTOC(vp)); 1816 SET_VTOC(vp) = NULL; 1817 return (0); 1818 } 1819 1820 int 1821 coda_lock(v) 1822 void *v; 1823 { 1824 /* true args */ 1825 struct vop_lock_args *ap = v; 1826 struct vnode *vp = ap->a_vp; 1827 struct cnode *cp = VTOC(vp); 1828 /* upcall decl */ 1829 /* locals */ 1830 1831 ENTRY; 1832 1833 if (coda_lockdebug) { 1834 myprintf(("Attempting lock on %lx.%lx.%lx\n", 1835 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1836 } 1837 1838 return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock)); 1839 } 1840 1841 int 1842 coda_unlock(v) 1843 void *v; 1844 { 1845 /* true args */ 1846 struct vop_unlock_args *ap = v; 1847 struct vnode *vp = ap->a_vp; 1848 struct cnode *cp = VTOC(vp); 1849 /* upcall decl */ 1850 /* locals */ 1851 1852 ENTRY; 1853 if (coda_lockdebug) { 1854 myprintf(("Attempting unlock on %lx.%lx.%lx\n", 1855 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1856 } 1857 1858 return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock)); 1859 } 1860 1861 int 1862 coda_islocked(v) 1863 void *v; 1864 { 1865 /* true args */ 1866 struct vop_islocked_args *ap = v; 1867 ENTRY; 1868 1869 return (lockstatus(&ap->a_vp->v_lock)); 1870 } 1871 1872 /* How one looks up a vnode given a device/inode pair: */ 1873 int 1874 coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp) 1875 { 1876 /* This is like VFS_VGET() or igetinode()! */ 1877 int error; 1878 struct mount *mp; 1879 1880 if (!(mp = devtomp(dev))) { 1881 myprintf(("coda_grab_vnode: devtomp(%d) returns NULL\n", dev)); 1882 return(ENXIO); 1883 } 1884 1885 /* XXX - ensure that nonzero-return means failure */ 1886 error = VFS_VGET(mp,ino,vpp); 1887 if (error) { 1888 myprintf(("coda_grab_vnode: iget/vget(%d, %d) returns %p, err %d\n", 1889 dev, ino, *vpp, error)); 1890 return(ENOENT); 1891 } 1892 return(0); 1893 } 1894 1895 void 1896 print_vattr( attr ) 1897 struct vattr *attr; 1898 { 1899 char *typestr; 1900 1901 switch (attr->va_type) { 1902 case VNON: 1903 typestr = "VNON"; 1904 break; 1905 case VREG: 1906 typestr = "VREG"; 1907 break; 1908 case VDIR: 1909 typestr = "VDIR"; 1910 break; 1911 case VBLK: 1912 typestr = "VBLK"; 1913 break; 1914 case VCHR: 1915 typestr = "VCHR"; 1916 break; 1917 case VLNK: 1918 typestr = "VLNK"; 1919 break; 1920 case VSOCK: 1921 typestr = "VSCK"; 1922 break; 1923 case VFIFO: 1924 typestr = "VFFO"; 1925 break; 1926 case VBAD: 1927 typestr = "VBAD"; 1928 break; 1929 default: 1930 typestr = "????"; 1931 break; 1932 } 1933 1934 1935 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", 1936 typestr, (int)attr->va_mode, (int)attr->va_uid, 1937 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); 1938 1939 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", 1940 (int)attr->va_fileid, (int)attr->va_nlink, 1941 (int)attr->va_size, 1942 (int)attr->va_blocksize,(int)attr->va_bytes)); 1943 myprintf((" gen %ld flags %ld vaflags %d\n", 1944 attr->va_gen, attr->va_flags, attr->va_vaflags)); 1945 myprintf((" atime sec %d nsec %d\n", 1946 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); 1947 myprintf((" mtime sec %d nsec %d\n", 1948 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); 1949 myprintf((" ctime sec %d nsec %d\n", 1950 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); 1951 } 1952 1953 /* How to print a ucred */ 1954 void 1955 print_cred(cred) 1956 struct ucred *cred; 1957 { 1958 1959 int i; 1960 1961 myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid)); 1962 1963 for (i=0; i < cred->cr_ngroups; i++) 1964 myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i])); 1965 myprintf(("\n")); 1966 1967 } 1968 1969 /* 1970 * Return a vnode for the given fid. 1971 * If no cnode exists for this fid create one and put it 1972 * in a table hashed by fid.Volume and fid.Vnode. If the cnode for 1973 * this fid is already in the table return it (ref count is 1974 * incremented by coda_find. The cnode will be flushed from the 1975 * table when coda_inactive calls coda_unsave. 1976 */ 1977 struct cnode * 1978 make_coda_node(fid, vfsp, type) 1979 ViceFid *fid; struct mount *vfsp; short type; 1980 { 1981 struct cnode *cp; 1982 int err; 1983 1984 if ((cp = coda_find(fid)) == NULL) { 1985 struct vnode *vp; 1986 1987 cp = coda_alloc(); 1988 cp->c_fid = *fid; 1989 1990 err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp); 1991 if (err) { 1992 panic("coda: getnewvnode returned error %d", err); 1993 } 1994 vp->v_data = cp; 1995 vp->v_type = type; 1996 cp->c_vnode = vp; 1997 coda_save(cp); 1998 1999 } else { 2000 vref(CTOV(cp)); 2001 } 2002 2003 return cp; 2004 } 2005 2006 int 2007 coda_getpages(v) 2008 void *v; 2009 { 2010 struct vop_getpages_args /* { 2011 struct vnode *a_vp; 2012 voff_t a_offset; 2013 struct vm_page **a_m; 2014 int *a_count; 2015 int a_centeridx; 2016 vm_prot_t a_access_type; 2017 int a_advice; 2018 int a_flags; 2019 } */ *ap = v; 2020 struct vnode *vp = ap->a_vp; 2021 struct cnode *cp = VTOC(vp); 2022 struct proc *p = curproc; 2023 struct ucred *cred = p->p_ucred; 2024 int error; 2025 2026 /* Check for control object. */ 2027 if (IS_CTL_VP(vp)) { 2028 return(EINVAL); 2029 } 2030 2031 error = VOP_OPEN(vp, FREAD, cred, p); 2032 if (error) { 2033 return error; 2034 } 2035 ap->a_vp = cp->c_ovp; 2036 error = VOCALL(ap->a_vp->v_op, VOFFSET(vop_getpages), ap); 2037 (void) VOP_CLOSE(vp, FREAD, cred, p); 2038 return error; 2039 } 2040 2041 int 2042 coda_putpages(v) 2043 void *v; 2044 { 2045 struct vop_putpages_args /* { 2046 struct vnode *a_vp; 2047 voff_t a_offlo; 2048 voff_t a_offhi; 2049 int a_flags; 2050 } */ *ap = v; 2051 struct vnode *vp = ap->a_vp; 2052 2053 simple_unlock(&vp->v_interlock); 2054 2055 /* Check for control object. */ 2056 if (IS_CTL_VP(vp)) { 2057 return(EINVAL); 2058 } 2059 2060 /* 2061 * XXX 2062 * we'd like to do something useful here for msync(), 2063 * but that turns out to be hard. 2064 */ 2065 2066 return 0; 2067 } 2068
Indexes created Wed Oct 15 07:09:58 GMT 2025