coda_vnops.c revision 1.42
1 /* 2 coda_create/vn_open 3 remove/unlink 4 link 5 mkdir 6 rmdir 7 symlink 8 */ 9 /* $NetBSD: coda_vnops.c,v 1.42 2005/08/19 02:03:57 christos 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 1.42 2005/08/19 02:03:57 christos 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 (WRITABLE(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 %llu result %d\n", 260 dev, (unsigned long long)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 opened_internally = 0; 399 int error = 0; 400 401 MARK_ENTRY(CODA_RDWR_STATS); 402 403 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %lu, %lld, %d)\n", rw, 404 uiop->uio_iov->iov_base, 405 (unsigned long) uiop->uio_resid, 406 (long long) uiop->uio_offset, uiop->uio_segflg)); ) 407 408 /* Check for rdwr of control object. */ 409 if (IS_CTL_VP(vp)) { 410 MARK_INT_FAIL(CODA_RDWR_STATS); 411 return(EINVAL); 412 } 413 414 /* Redirect the request to UFS. */ 415 416 /* 417 * If file is not already open this must be a page 418 * {read,write} request. Iget the cache file's inode 419 * pointer if we still have its <device, inode> pair. 420 * Otherwise, we must do an internal open to derive the 421 * pair. 422 */ 423 if (cfvp == NULL) { 424 /* 425 * If we're dumping core, do the internal open. Otherwise 426 * venus won't have the correct size of the core when 427 * it's completely written. 428 */ 429 if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 430 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp); 431 if (error) { 432 MARK_INT_FAIL(CODA_RDWR_STATS); 433 return(error); 434 } 435 /* 436 * We get the vnode back locked in both Mach and 437 * NetBSD. Needs unlocked 438 */ 439 VOP_UNLOCK(cfvp, 0); 440 } 441 else { 442 opened_internally = 1; 443 MARK_INT_GEN(CODA_OPEN_STATS); 444 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), 445 cred, p); 446 #ifdef CODA_VERBOSE 447 printf("coda_rdwr: Internally Opening %p\n", vp); 448 #endif 449 if (error) { 450 MARK_INT_FAIL(CODA_RDWR_STATS); 451 return(error); 452 } 453 cfvp = cp->c_ovp; 454 } 455 } 456 457 /* Have UFS handle the call. */ 458 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = %s, refcnt = %d\n", 459 coda_f2s(&cp->c_fid), 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, 521 iap->path, p); 522 error = namei(&ndp); 523 tvp = ndp.ni_vp; 524 525 if (error) { 526 MARK_INT_FAIL(CODA_IOCTL_STATS); 527 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n", 528 error));) 529 return(error); 530 } 531 532 /* 533 * Make sure this is a coda style cnode, but it may be a 534 * different vfsp 535 */ 536 /* XXX: this totally violates the comment about vtagtype in vnode.h */ 537 if (tvp->v_tag != VT_CODA) { 538 vrele(tvp); 539 MARK_INT_FAIL(CODA_IOCTL_STATS); 540 CODADEBUG(CODA_IOCTL, 541 myprintf(("coda_ioctl error: %s not a coda object\n", 542 iap->path));) 543 return(EINVAL); 544 } 545 546 if (iap->vi.in_size > VC_MAXDATASIZE) { 547 vrele(tvp); 548 return(EINVAL); 549 } 550 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, p); 551 552 if (error) 553 MARK_INT_FAIL(CODA_IOCTL_STATS); 554 else 555 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) 556 557 vrele(tvp); 558 return(error); 559 } 560 561 /* 562 * To reduce the cost of a user-level venus;we cache attributes in 563 * the kernel. Each cnode has storage allocated for an attribute. If 564 * c_vattr is valid, return a reference to it. Otherwise, get the 565 * attributes from venus and store them in the cnode. There is some 566 * question if this method is a security leak. But I think that in 567 * order to make this call, the user must have done a lookup and 568 * opened the file, and therefore should already have access. 569 */ 570 int 571 coda_getattr(v) 572 void *v; 573 { 574 /* true args */ 575 struct vop_getattr_args *ap = v; 576 struct vnode *vp = ap->a_vp; 577 struct cnode *cp = VTOC(vp); 578 struct vattr *vap = ap->a_vap; 579 struct ucred *cred = ap->a_cred; 580 struct proc *p = ap->a_p; 581 /* locals */ 582 int error; 583 584 MARK_ENTRY(CODA_GETATTR_STATS); 585 586 /* Check for getattr of control object. */ 587 if (IS_CTL_VP(vp)) { 588 MARK_INT_FAIL(CODA_GETATTR_STATS); 589 return(ENOENT); 590 } 591 592 /* Check to see if the attributes have already been cached */ 593 if (VALID_VATTR(cp)) { 594 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: %s\n", 595 coda_f2s(&cp->c_fid)));}); 596 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 597 print_vattr(&cp->c_vattr); ); 598 599 *vap = cp->c_vattr; 600 MARK_INT_SAT(CODA_GETATTR_STATS); 601 return(0); 602 } 603 604 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, p, vap); 605 606 if (!error) { 607 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss %s: result %d\n", 608 coda_f2s(&cp->c_fid), error)); ) 609 610 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 611 print_vattr(vap); ); 612 613 /* If not open for write, store attributes in cnode */ 614 if ((cp->c_owrite == 0) && (coda_attr_cache)) { 615 cp->c_vattr = *vap; 616 cp->c_flags |= C_VATTR; 617 } 618 619 } 620 return(error); 621 } 622 623 int 624 coda_setattr(v) 625 void *v; 626 { 627 /* true args */ 628 struct vop_setattr_args *ap = v; 629 struct vnode *vp = ap->a_vp; 630 struct cnode *cp = VTOC(vp); 631 struct vattr *vap = ap->a_vap; 632 struct ucred *cred = ap->a_cred; 633 struct proc *p = ap->a_p; 634 /* locals */ 635 int error; 636 637 MARK_ENTRY(CODA_SETATTR_STATS); 638 639 /* Check for setattr of control object. */ 640 if (IS_CTL_VP(vp)) { 641 MARK_INT_FAIL(CODA_SETATTR_STATS); 642 return(ENOENT); 643 } 644 645 if (codadebug & CODADBGMSK(CODA_SETATTR)) { 646 print_vattr(vap); 647 } 648 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, p); 649 650 if (!error) 651 cp->c_flags &= ~C_VATTR; 652 653 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); ) 654 return(error); 655 } 656 657 int 658 coda_access(v) 659 void *v; 660 { 661 /* true args */ 662 struct vop_access_args *ap = v; 663 struct vnode *vp = ap->a_vp; 664 struct cnode *cp = VTOC(vp); 665 int mode = ap->a_mode; 666 struct ucred *cred = ap->a_cred; 667 struct proc *p = ap->a_p; 668 /* locals */ 669 int error; 670 671 MARK_ENTRY(CODA_ACCESS_STATS); 672 673 /* Check for access of control object. Only read access is 674 allowed on it. */ 675 if (IS_CTL_VP(vp)) { 676 /* bogus hack - all will be marked as successes */ 677 MARK_INT_SAT(CODA_ACCESS_STATS); 678 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 679 ? 0 : EACCES); 680 } 681 682 /* 683 * if the file is a directory, and we are checking exec (eg lookup) 684 * access, and the file is in the namecache, then the user must have 685 * lookup access to it. 686 */ 687 if (coda_access_cache) { 688 if ((vp->v_type == VDIR) && (mode & VEXEC)) { 689 if (coda_nc_lookup(cp, ".", 1, cred)) { 690 MARK_INT_SAT(CODA_ACCESS_STATS); 691 return(0); /* it was in the cache */ 692 } 693 } 694 } 695 696 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, p); 697 698 return(error); 699 } 700 701 /* 702 * CODA abort op, called after namei() when a CREATE/DELETE isn't actually 703 * done. If a buffer has been saved in anticipation of a coda_create or 704 * a coda_remove, delete it. 705 */ 706 /* ARGSUSED */ 707 int 708 coda_abortop(v) 709 void *v; 710 { 711 /* true args */ 712 struct vop_abortop_args /* { 713 struct vnode *a_dvp; 714 struct componentname *a_cnp; 715 } */ *ap = v; 716 /* upcall decl */ 717 /* locals */ 718 719 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 720 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 721 return (0); 722 } 723 724 int 725 coda_readlink(v) 726 void *v; 727 { 728 /* true args */ 729 struct vop_readlink_args *ap = v; 730 struct vnode *vp = ap->a_vp; 731 struct cnode *cp = VTOC(vp); 732 struct uio *uiop = ap->a_uio; 733 struct ucred *cred = ap->a_cred; 734 struct proc *p = ap->a_uio->uio_procp; 735 /* locals */ 736 int error; 737 char *str; 738 int len; 739 740 MARK_ENTRY(CODA_READLINK_STATS); 741 742 /* Check for readlink of control object. */ 743 if (IS_CTL_VP(vp)) { 744 MARK_INT_FAIL(CODA_READLINK_STATS); 745 return(ENOENT); 746 } 747 748 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ 749 uiop->uio_rw = UIO_READ; 750 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); 751 if (error) 752 MARK_INT_FAIL(CODA_READLINK_STATS); 753 else 754 MARK_INT_SAT(CODA_READLINK_STATS); 755 return(error); 756 } 757 758 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, p, &str, &len); 759 760 if (!error) { 761 uiop->uio_rw = UIO_READ; 762 error = uiomove(str, len, uiop); 763 764 if (coda_symlink_cache) { 765 cp->c_symlink = str; 766 cp->c_symlen = len; 767 cp->c_flags |= C_SYMLINK; 768 } else 769 CODA_FREE(str, len); 770 } 771 772 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) 773 return(error); 774 } 775 776 int 777 coda_fsync(v) 778 void *v; 779 { 780 /* true args */ 781 struct vop_fsync_args *ap = v; 782 struct vnode *vp = ap->a_vp; 783 struct cnode *cp = VTOC(vp); 784 struct ucred *cred = ap->a_cred; 785 struct proc *p = ap->a_p; 786 /* locals */ 787 struct vnode *convp = cp->c_ovp; 788 int error; 789 790 MARK_ENTRY(CODA_FSYNC_STATS); 791 792 /* Check for fsync on an unmounting object */ 793 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync 794 * after an unmount has been initiated. This is a Bad Thing, 795 * which we have to avoid. Not a legitimate failure for stats. 796 */ 797 if (IS_UNMOUNTING(cp)) { 798 return(ENODEV); 799 } 800 801 /* Check for fsync of control object. */ 802 if (IS_CTL_VP(vp)) { 803 MARK_INT_SAT(CODA_FSYNC_STATS); 804 return(0); 805 } 806 807 if (convp) 808 VOP_FSYNC(convp, cred, MNT_WAIT, 0, 0, p); 809 810 /* 811 * We can expect fsync on any vnode at all if venus is pruging it. 812 * Venus can't very well answer the fsync request, now can it? 813 * Hopefully, it won't have to, because hopefully, venus preserves 814 * the (possibly untrue) invariant that it never purges an open 815 * vnode. Hopefully. 816 */ 817 if (cp->c_flags & C_PURGING) { 818 return(0); 819 } 820 821 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, p); 822 823 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ); 824 return(error); 825 } 826 827 int 828 coda_inactive(v) 829 void *v; 830 { 831 /* XXX - at the moment, inactive doesn't look at cred, and doesn't 832 have a proc pointer. Oops. */ 833 /* true args */ 834 struct vop_inactive_args *ap = v; 835 struct vnode *vp = ap->a_vp; 836 struct cnode *cp = VTOC(vp); 837 struct ucred *cred __attribute__((unused)) = NULL; 838 struct proc *p __attribute__((unused)) = curproc; 839 /* upcall decl */ 840 /* locals */ 841 842 /* We don't need to send inactive to venus - DCS */ 843 MARK_ENTRY(CODA_INACTIVE_STATS); 844 845 if (IS_CTL_VP(vp)) { 846 MARK_INT_SAT(CODA_INACTIVE_STATS); 847 return 0; 848 } 849 850 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %s, vfsp %p\n", 851 coda_f2s(&cp->c_fid), vp->v_mount));) 852 853 /* If an array has been allocated to hold the symlink, deallocate it */ 854 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { 855 if (cp->c_symlink == NULL) 856 panic("coda_inactive: null symlink pointer in cnode"); 857 858 CODA_FREE(cp->c_symlink, cp->c_symlen); 859 cp->c_flags &= ~C_SYMLINK; 860 cp->c_symlen = 0; 861 } 862 863 /* Remove it from the table so it can't be found. */ 864 coda_unsave(cp); 865 if (vp->v_mount->mnt_data == NULL) { 866 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); 867 panic("badness in coda_inactive"); 868 } 869 870 if (IS_UNMOUNTING(cp)) { 871 #ifdef DEBUG 872 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp); 873 if (cp->c_ovp != NULL) 874 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n", 875 vp->v_usecount, vp, cp); 876 #endif 877 lockmgr(&vp->v_lock, LK_RELEASE, &vp->v_interlock); 878 } else { 879 #ifdef OLD_DIAGNOSTIC 880 if (CTOV(cp)->v_usecount) { 881 panic("coda_inactive: nonzero reference count"); 882 } 883 if (cp->c_ovp != NULL) { 884 panic("coda_inactive: cp->ovp != NULL"); 885 } 886 #endif 887 VOP_UNLOCK(vp, 0); 888 vgone(vp); 889 } 890 891 MARK_INT_SAT(CODA_INACTIVE_STATS); 892 return(0); 893 } 894 895 /* 896 * Remote file system operations having to do with directory manipulation. 897 */ 898 899 /* 900 * It appears that in NetBSD, lookup is supposed to return the vnode locked 901 */ 902 int 903 coda_lookup(v) 904 void *v; 905 { 906 /* true args */ 907 struct vop_lookup_args *ap = v; 908 struct vnode *dvp = ap->a_dvp; 909 struct cnode *dcp = VTOC(dvp); 910 struct vnode **vpp = ap->a_vpp; 911 /* 912 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest 913 * of the string to xlate, and that we must try to get at least 914 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I 915 * could be wrong. 916 */ 917 struct componentname *cnp = ap->a_cnp; 918 struct ucred *cred = cnp->cn_cred; 919 struct proc *p = cnp->cn_proc; 920 /* locals */ 921 struct cnode *cp; 922 const char *nm = cnp->cn_nameptr; 923 int len = cnp->cn_namelen; 924 CodaFid VFid; 925 int vtype; 926 int error = 0; 927 928 cnp->cn_flags &= ~PDIRUNLOCK; 929 930 MARK_ENTRY(CODA_LOOKUP_STATS); 931 932 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %s\n", 933 nm, coda_f2s(&dcp->c_fid)));); 934 935 /* Check for lookup of control object. */ 936 if (IS_CTL_NAME(dvp, nm, len)) { 937 *vpp = coda_ctlvp; 938 vref(*vpp); 939 MARK_INT_SAT(CODA_LOOKUP_STATS); 940 goto exit; 941 } 942 943 if (len+1 > CODA_MAXNAMLEN) { 944 MARK_INT_FAIL(CODA_LOOKUP_STATS); 945 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %s (%s)\n", 946 coda_f2s(&dcp->c_fid), nm));); 947 *vpp = (struct vnode *)0; 948 error = EINVAL; 949 goto exit; 950 } 951 /* First try to look the file up in the cfs name cache */ 952 /* lock the parent vnode? */ 953 cp = coda_nc_lookup(dcp, nm, len, cred); 954 if (cp) { 955 *vpp = CTOV(cp); 956 vref(*vpp); 957 CODADEBUG(CODA_LOOKUP, 958 myprintf(("lookup result %d vpp %p\n",error,*vpp));) 959 } else { 960 961 /* The name wasn't cached, so we need to contact Venus */ 962 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, p, &VFid, &vtype); 963 964 if (error) { 965 MARK_INT_FAIL(CODA_LOOKUP_STATS); 966 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %s (%s)%d\n", 967 coda_f2s(&dcp->c_fid), nm, error));) 968 *vpp = (struct vnode *)0; 969 } else { 970 MARK_INT_SAT(CODA_LOOKUP_STATS); 971 CODADEBUG(CODA_LOOKUP, 972 myprintf(("lookup: %s type %o result %d\n", 973 coda_f2s(&VFid), vtype, error)); ) 974 975 cp = make_coda_node(&VFid, dvp->v_mount, vtype); 976 *vpp = CTOV(cp); 977 978 /* enter the new vnode in the Name Cache only if the top bit isn't set */ 979 /* And don't enter a new vnode for an invalid one! */ 980 if (!(vtype & CODA_NOCACHE)) 981 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 982 } 983 } 984 985 exit: 986 /* 987 * If we are creating, and this was the last name to be looked up, 988 * and the error was ENOENT, then there really shouldn't be an 989 * error and we can make the leaf NULL and return success. Since 990 * this is supposed to work under Mach as well as NetBSD, we're 991 * leaving this fn wrapped. We also must tell lookup/namei that 992 * we need to save the last component of the name. (Create will 993 * have to free the name buffer later...lucky us...) 994 */ 995 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) 996 && (cnp->cn_flags & ISLASTCN) 997 && (error == ENOENT)) 998 { 999 error = EJUSTRETURN; 1000 cnp->cn_flags |= SAVENAME; 1001 *ap->a_vpp = NULL; 1002 } 1003 1004 /* 1005 * If we are removing, and we are at the last element, and we 1006 * found it, then we need to keep the name around so that the 1007 * removal will go ahead as planned. Unfortunately, this will 1008 * probably also lock the to-be-removed vnode, which may or may 1009 * not be a good idea. I'll have to look at the bits of 1010 * coda_remove to make sure. We'll only save the name if we did in 1011 * fact find the name, otherwise coda_remove won't have a chance 1012 * to free the pathname. 1013 */ 1014 if ((cnp->cn_nameiop == DELETE) 1015 && (cnp->cn_flags & ISLASTCN) 1016 && !error) 1017 { 1018 cnp->cn_flags |= SAVENAME; 1019 } 1020 1021 /* 1022 * If the lookup went well, we need to (potentially?) unlock the 1023 * parent, and lock the child. We are only responsible for 1024 * checking to see if the parent is supposed to be unlocked before 1025 * we return. We must always lock the child (provided there is 1026 * one, and (the parent isn't locked or it isn't the same as the 1027 * parent.) Simple, huh? We can never leave the parent locked unless 1028 * we are ISLASTCN 1029 */ 1030 if (!error || (error == EJUSTRETURN)) { 1031 if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) { 1032 if ((error = VOP_UNLOCK(dvp, 0))) { 1033 return error; 1034 } 1035 cnp->cn_flags |= PDIRUNLOCK; 1036 /* 1037 * The parent is unlocked. As long as there is a child, 1038 * lock it without bothering to check anything else. 1039 */ 1040 if (*ap->a_vpp) { 1041 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1042 printf("coda_lookup: "); 1043 panic("unlocked parent but couldn't lock child"); 1044 } 1045 } 1046 } else { 1047 /* The parent is locked, and may be the same as the child */ 1048 if (*ap->a_vpp && (*ap->a_vpp != dvp)) { 1049 /* Different, go ahead and lock it. */ 1050 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1051 printf("coda_lookup: "); 1052 panic("unlocked parent but couldn't lock child"); 1053 } 1054 } 1055 } 1056 } else { 1057 /* If the lookup failed, we need to ensure that the leaf is NULL */ 1058 /* Don't change any locking? */ 1059 *ap->a_vpp = NULL; 1060 } 1061 return(error); 1062 } 1063 1064 /*ARGSUSED*/ 1065 int 1066 coda_create(v) 1067 void *v; 1068 { 1069 /* true args */ 1070 struct vop_create_args *ap = v; 1071 struct vnode *dvp = ap->a_dvp; 1072 struct cnode *dcp = VTOC(dvp); 1073 struct vattr *va = ap->a_vap; 1074 int exclusive = 1; 1075 int mode = ap->a_vap->va_mode; 1076 struct vnode **vpp = ap->a_vpp; 1077 struct componentname *cnp = ap->a_cnp; 1078 struct ucred *cred = cnp->cn_cred; 1079 struct proc *p = cnp->cn_proc; 1080 /* locals */ 1081 int error; 1082 struct cnode *cp; 1083 const char *nm = cnp->cn_nameptr; 1084 int len = cnp->cn_namelen; 1085 CodaFid VFid; 1086 struct vattr attr; 1087 1088 MARK_ENTRY(CODA_CREATE_STATS); 1089 1090 /* All creates are exclusive XXX */ 1091 /* I'm assuming the 'mode' argument is the file mode bits XXX */ 1092 1093 /* Check for create of control object. */ 1094 if (IS_CTL_NAME(dvp, nm, len)) { 1095 *vpp = (struct vnode *)0; 1096 MARK_INT_FAIL(CODA_CREATE_STATS); 1097 return(EACCES); 1098 } 1099 1100 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, p, &VFid, &attr); 1101 1102 if (!error) { 1103 1104 /* If this is an exclusive create, panic if the file already exists. */ 1105 /* Venus should have detected the file and reported EEXIST. */ 1106 1107 if ((exclusive == 1) && 1108 (coda_find(&VFid) != NULL)) 1109 panic("cnode existed for newly created file!"); 1110 1111 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); 1112 *vpp = CTOV(cp); 1113 1114 /* Update va to reflect the new attributes. */ 1115 (*va) = attr; 1116 1117 /* Update the attribute cache and mark it as valid */ 1118 if (coda_attr_cache) { 1119 VTOC(*vpp)->c_vattr = attr; 1120 VTOC(*vpp)->c_flags |= C_VATTR; 1121 } 1122 1123 /* Invalidate the parent's attr cache, the modification time has changed */ 1124 VTOC(dvp)->c_flags &= ~C_VATTR; 1125 1126 /* enter the new vnode in the Name Cache */ 1127 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1128 1129 CODADEBUG(CODA_CREATE, 1130 myprintf(("create: %s, result %d\n", 1131 coda_f2s(&VFid), error)); ) 1132 } else { 1133 *vpp = (struct vnode *)0; 1134 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));) 1135 } 1136 1137 /* Locking strategy. */ 1138 /* 1139 * In NetBSD, all creates must explicitly vput their dvp's. We'll 1140 * go ahead and use the LOCKLEAF flag of the cnp argument. 1141 * However, I'm pretty sure that create must return the leaf 1142 * locked; so there is a DIAGNOSTIC check to ensure that this is 1143 * true. 1144 */ 1145 vput(dvp); 1146 if (!error) { 1147 if (cnp->cn_flags & LOCKLEAF) { 1148 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1149 printf("coda_create: "); 1150 panic("unlocked parent but couldn't lock child"); 1151 } 1152 } 1153 #ifdef OLD_DIAGNOSTIC 1154 else { 1155 printf("coda_create: LOCKLEAF not set!\n"); 1156 } 1157 #endif 1158 } 1159 /* Have to free the previously saved name */ 1160 /* 1161 * This condition is stolen from ufs_makeinode. I have no idea 1162 * why it's here, but what the hey... 1163 */ 1164 if ((cnp->cn_flags & SAVESTART) == 0) { 1165 PNBUF_PUT(cnp->cn_pnbuf); 1166 } 1167 return(error); 1168 } 1169 1170 int 1171 coda_remove(v) 1172 void *v; 1173 { 1174 /* true args */ 1175 struct vop_remove_args *ap = v; 1176 struct vnode *dvp = ap->a_dvp; 1177 struct cnode *cp = VTOC(dvp); 1178 struct componentname *cnp = ap->a_cnp; 1179 struct ucred *cred = cnp->cn_cred; 1180 struct proc *p = cnp->cn_proc; 1181 /* locals */ 1182 int error; 1183 const char *nm = cnp->cn_nameptr; 1184 int len = cnp->cn_namelen; 1185 struct cnode *tp; 1186 1187 MARK_ENTRY(CODA_REMOVE_STATS); 1188 1189 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %s\n", 1190 nm, coda_f2s(&cp->c_fid)));); 1191 1192 /* Remove the file's entry from the CODA Name Cache */ 1193 /* We're being conservative here, it might be that this person 1194 * doesn't really have sufficient access to delete the file 1195 * but we feel zapping the entry won't really hurt anyone -- dcs 1196 */ 1197 /* I'm gonna go out on a limb here. If a file and a hardlink to it 1198 * exist, and one is removed, the link count on the other will be 1199 * off by 1. We could either invalidate the attrs if cached, or 1200 * fix them. I'll try to fix them. DCS 11/8/94 1201 */ 1202 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); 1203 if (tp) { 1204 if (VALID_VATTR(tp)) { /* If attrs are cached */ 1205 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ 1206 tp->c_vattr.va_nlink--; 1207 } 1208 } 1209 1210 coda_nc_zapfile(VTOC(dvp), nm, len); 1211 /* No need to flush it if it doesn't exist! */ 1212 } 1213 /* Invalidate the parent's attr cache, the modification time has changed */ 1214 VTOC(dvp)->c_flags &= ~C_VATTR; 1215 1216 /* Check for remove of control object. */ 1217 if (IS_CTL_NAME(dvp, nm, len)) { 1218 MARK_INT_FAIL(CODA_REMOVE_STATS); 1219 return(ENOENT); 1220 } 1221 1222 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, p); 1223 1224 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) 1225 1226 /* 1227 * Regardless of what happens, we have to unconditionally drop 1228 * locks/refs on parent and child. (I hope). This is based on 1229 * what ufs_remove seems to be doing. 1230 */ 1231 if (dvp == ap->a_vp) { 1232 vrele(ap->a_vp); 1233 } else { 1234 vput(ap->a_vp); 1235 } 1236 vput(dvp); 1237 1238 if ((cnp->cn_flags & SAVESTART) == 0) { 1239 PNBUF_PUT(cnp->cn_pnbuf); 1240 } 1241 return(error); 1242 } 1243 1244 int 1245 coda_link(v) 1246 void *v; 1247 { 1248 /* true args */ 1249 struct vop_link_args *ap = v; 1250 struct vnode *vp = ap->a_vp; 1251 struct cnode *cp = VTOC(vp); 1252 struct vnode *tdvp = ap->a_dvp; 1253 struct cnode *tdcp = VTOC(tdvp); 1254 struct componentname *cnp = ap->a_cnp; 1255 struct ucred *cred = cnp->cn_cred; 1256 struct proc *p = cnp->cn_proc; 1257 /* locals */ 1258 int error; 1259 const char *nm = cnp->cn_nameptr; 1260 int len = cnp->cn_namelen; 1261 1262 MARK_ENTRY(CODA_LINK_STATS); 1263 1264 if (codadebug & CODADBGMSK(CODA_LINK)) { 1265 1266 myprintf(("nb_link: vp fid: %s\n", 1267 coda_f2s(&cp->c_fid))); 1268 myprintf(("nb_link: tdvp fid: %s)\n", 1269 coda_f2s(&tdcp->c_fid))); 1270 1271 } 1272 if (codadebug & CODADBGMSK(CODA_LINK)) { 1273 myprintf(("link: vp fid: %s\n", 1274 coda_f2s(&cp->c_fid))); 1275 myprintf(("link: tdvp fid: %s\n", 1276 coda_f2s(&tdcp->c_fid))); 1277 1278 } 1279 1280 /* Check for link to/from control object. */ 1281 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) { 1282 MARK_INT_FAIL(CODA_LINK_STATS); 1283 return(EACCES); 1284 } 1285 1286 /* 1287 * According to the ufs_link operation here's the locking situation: 1288 * We enter with the thing called "dvp" (the directory) locked. 1289 * We must unconditionally drop locks on "dvp" 1290 * 1291 * We enter with the thing called "vp" (the linked-to) unlocked, 1292 * but ref'd (?) 1293 * We seem to need to lock it before calling coda_link, and 1294 * unconditionally unlock it after. 1295 */ 1296 1297 if ((ap->a_vp != tdvp) && (error = vn_lock(ap->a_vp, LK_EXCLUSIVE))) { 1298 goto exit; 1299 } 1300 1301 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, p); 1302 1303 /* Invalidate the parent's attr cache, the modification time has changed */ 1304 VTOC(tdvp)->c_flags &= ~C_VATTR; 1305 VTOC(vp)->c_flags &= ~C_VATTR; 1306 1307 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) 1308 1309 exit: 1310 1311 if (ap->a_vp != tdvp) { 1312 VOP_UNLOCK(ap->a_vp, 0); 1313 } 1314 vput(tdvp); 1315 1316 /* Drop the name buffer if we don't need to SAVESTART */ 1317 if ((cnp->cn_flags & SAVESTART) == 0) { 1318 PNBUF_PUT(cnp->cn_pnbuf); 1319 } 1320 return(error); 1321 } 1322 1323 int 1324 coda_rename(v) 1325 void *v; 1326 { 1327 /* true args */ 1328 struct vop_rename_args *ap = v; 1329 struct vnode *odvp = ap->a_fdvp; 1330 struct cnode *odcp = VTOC(odvp); 1331 struct componentname *fcnp = ap->a_fcnp; 1332 struct vnode *ndvp = ap->a_tdvp; 1333 struct cnode *ndcp = VTOC(ndvp); 1334 struct componentname *tcnp = ap->a_tcnp; 1335 struct ucred *cred = fcnp->cn_cred; 1336 struct proc *p = fcnp->cn_proc; 1337 /* true args */ 1338 int error; 1339 const char *fnm = fcnp->cn_nameptr; 1340 int flen = fcnp->cn_namelen; 1341 const char *tnm = tcnp->cn_nameptr; 1342 int tlen = tcnp->cn_namelen; 1343 1344 MARK_ENTRY(CODA_RENAME_STATS); 1345 1346 /* Hmmm. The vnodes are already looked up. Perhaps they are locked? 1347 This could be Bad. XXX */ 1348 #ifdef OLD_DIAGNOSTIC 1349 if ((fcnp->cn_cred != tcnp->cn_cred) 1350 || (fcnp->cn_proc != tcnp->cn_proc)) 1351 { 1352 panic("coda_rename: component names don't agree"); 1353 } 1354 #endif 1355 1356 /* Check for rename involving control object. */ 1357 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { 1358 MARK_INT_FAIL(CODA_RENAME_STATS); 1359 return(EACCES); 1360 } 1361 1362 /* Problem with moving directories -- need to flush entry for .. */ 1363 if (odvp != ndvp) { 1364 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); 1365 if (ovcp) { 1366 struct vnode *ovp = CTOV(ovcp); 1367 if ((ovp) && 1368 (ovp->v_type == VDIR)) /* If it's a directory */ 1369 coda_nc_zapfile(VTOC(ovp),"..", 2); 1370 } 1371 } 1372 1373 /* Remove the entries for both source and target files */ 1374 coda_nc_zapfile(VTOC(odvp), fnm, flen); 1375 coda_nc_zapfile(VTOC(ndvp), tnm, tlen); 1376 1377 /* Invalidate the parent's attr cache, the modification time has changed */ 1378 VTOC(odvp)->c_flags &= ~C_VATTR; 1379 VTOC(ndvp)->c_flags &= ~C_VATTR; 1380 1381 if (flen+1 > CODA_MAXNAMLEN) { 1382 MARK_INT_FAIL(CODA_RENAME_STATS); 1383 error = EINVAL; 1384 goto exit; 1385 } 1386 1387 if (tlen+1 > CODA_MAXNAMLEN) { 1388 MARK_INT_FAIL(CODA_RENAME_STATS); 1389 error = EINVAL; 1390 goto exit; 1391 } 1392 1393 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, p); 1394 1395 exit: 1396 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) 1397 /* XXX - do we need to call cache pureg on the moved vnode? */ 1398 cache_purge(ap->a_fvp); 1399 1400 /* It seems to be incumbent on us to drop locks on all four vnodes */ 1401 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ 1402 1403 vrele(ap->a_fvp); 1404 vrele(odvp); 1405 1406 if (ap->a_tvp) { 1407 if (ap->a_tvp == ndvp) { 1408 vrele(ap->a_tvp); 1409 } else { 1410 vput(ap->a_tvp); 1411 } 1412 } 1413 1414 vput(ndvp); 1415 return(error); 1416 } 1417 1418 int 1419 coda_mkdir(v) 1420 void *v; 1421 { 1422 /* true args */ 1423 struct vop_mkdir_args *ap = v; 1424 struct vnode *dvp = ap->a_dvp; 1425 struct cnode *dcp = VTOC(dvp); 1426 struct componentname *cnp = ap->a_cnp; 1427 struct vattr *va = ap->a_vap; 1428 struct vnode **vpp = ap->a_vpp; 1429 struct ucred *cred = cnp->cn_cred; 1430 struct proc *p = cnp->cn_proc; 1431 /* locals */ 1432 int error; 1433 const char *nm = cnp->cn_nameptr; 1434 int len = cnp->cn_namelen; 1435 struct cnode *cp; 1436 CodaFid VFid; 1437 struct vattr ova; 1438 1439 MARK_ENTRY(CODA_MKDIR_STATS); 1440 1441 /* Check for mkdir of target object. */ 1442 if (IS_CTL_NAME(dvp, nm, len)) { 1443 *vpp = (struct vnode *)0; 1444 MARK_INT_FAIL(CODA_MKDIR_STATS); 1445 return(EACCES); 1446 } 1447 1448 if (len+1 > CODA_MAXNAMLEN) { 1449 *vpp = (struct vnode *)0; 1450 MARK_INT_FAIL(CODA_MKDIR_STATS); 1451 return(EACCES); 1452 } 1453 1454 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, p, &VFid, &ova); 1455 1456 if (!error) { 1457 if (coda_find(&VFid) != NULL) 1458 panic("cnode existed for newly created directory!"); 1459 1460 1461 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); 1462 *vpp = CTOV(cp); 1463 1464 /* enter the new vnode in the Name Cache */ 1465 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1466 1467 /* as a side effect, enter "." and ".." for the directory */ 1468 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); 1469 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); 1470 1471 if (coda_attr_cache) { 1472 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ 1473 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ 1474 } 1475 1476 /* Invalidate the parent's attr cache, the modification time has changed */ 1477 VTOC(dvp)->c_flags &= ~C_VATTR; 1478 1479 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: %s result %d\n", 1480 coda_f2s(&VFid), error)); ) 1481 } else { 1482 *vpp = (struct vnode *)0; 1483 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));) 1484 } 1485 1486 /* 1487 * Currently, all mkdirs explicitly vput their dvp's. 1488 * It also appears that we *must* lock the vpp, since 1489 * lockleaf isn't set, but someone down the road is going 1490 * to try to unlock the new directory. 1491 */ 1492 vput(dvp); 1493 if (!error) { 1494 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1495 panic("coda_mkdir: couldn't lock child"); 1496 } 1497 } 1498 1499 /* Have to free the previously saved name */ 1500 /* 1501 * ufs_mkdir doesn't check for SAVESTART before freeing the 1502 * pathname buffer, but ufs_create does. For the moment, I'll 1503 * follow their lead, but this seems like it is probably 1504 * incorrect. 1505 */ 1506 PNBUF_PUT(cnp->cn_pnbuf); 1507 return(error); 1508 } 1509 1510 int 1511 coda_rmdir(v) 1512 void *v; 1513 { 1514 /* true args */ 1515 struct vop_rmdir_args *ap = v; 1516 struct vnode *dvp = ap->a_dvp; 1517 struct cnode *dcp = VTOC(dvp); 1518 struct componentname *cnp = ap->a_cnp; 1519 struct ucred *cred = cnp->cn_cred; 1520 struct proc *p = cnp->cn_proc; 1521 /* true args */ 1522 int error; 1523 const char *nm = cnp->cn_nameptr; 1524 int len = cnp->cn_namelen; 1525 struct cnode *cp; 1526 1527 MARK_ENTRY(CODA_RMDIR_STATS); 1528 1529 /* Check for rmdir of control object. */ 1530 if (IS_CTL_NAME(dvp, nm, len)) { 1531 MARK_INT_FAIL(CODA_RMDIR_STATS); 1532 return(ENOENT); 1533 } 1534 1535 /* We're being conservative here, it might be that this person 1536 * doesn't really have sufficient access to delete the file 1537 * but we feel zapping the entry won't really hurt anyone -- dcs 1538 */ 1539 /* 1540 * As a side effect of the rmdir, remove any entries for children of 1541 * the directory, especially "." and "..". 1542 */ 1543 cp = coda_nc_lookup(dcp, nm, len, cred); 1544 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); 1545 1546 /* Remove the file's entry from the CODA Name Cache */ 1547 coda_nc_zapfile(dcp, nm, len); 1548 1549 /* Invalidate the parent's attr cache, the modification time has changed */ 1550 dcp->c_flags &= ~C_VATTR; 1551 1552 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, p); 1553 1554 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) 1555 1556 /* 1557 * regardless of what happens, we need to drop locks/refs on the 1558 * parent and child. I think. 1559 */ 1560 if (dvp == ap->a_vp) { 1561 vrele(ap->a_vp); 1562 } else { 1563 vput(ap->a_vp); 1564 } 1565 vput(dvp); 1566 1567 if ((cnp->cn_flags & SAVESTART) == 0) { 1568 PNBUF_PUT(cnp->cn_pnbuf); 1569 } 1570 return(error); 1571 } 1572 1573 int 1574 coda_symlink(v) 1575 void *v; 1576 { 1577 /* true args */ 1578 struct vop_symlink_args *ap = v; 1579 struct vnode *tdvp = ap->a_dvp; 1580 struct cnode *tdcp = VTOC(tdvp); 1581 struct componentname *cnp = ap->a_cnp; 1582 struct vattr *tva = ap->a_vap; 1583 char *path = ap->a_target; 1584 struct ucred *cred = cnp->cn_cred; 1585 struct proc *p = cnp->cn_proc; 1586 /* locals */ 1587 int error; 1588 u_long saved_cn_flags; 1589 /* 1590 * XXX I'm assuming the following things about coda_symlink's 1591 * arguments: 1592 * t(foo) is the new name/parent/etc being created. 1593 * lname is the contents of the new symlink. 1594 */ 1595 const char *nm = cnp->cn_nameptr; 1596 int len = cnp->cn_namelen; 1597 int plen = strlen(path); 1598 1599 /* XXX What about the vpp argument? Do we need it? */ 1600 /* 1601 * Here's the strategy for the moment: perform the symlink, then 1602 * do a lookup to grab the resulting vnode. I know this requires 1603 * two communications with Venus for a new sybolic link, but 1604 * that's the way the ball bounces. I don't yet want to change 1605 * the way the Mach symlink works. When Mach support is 1606 * deprecated, we should change symlink so that the common case 1607 * returns the resultant vnode in a vpp argument. 1608 */ 1609 1610 MARK_ENTRY(CODA_SYMLINK_STATS); 1611 1612 /* Check for symlink of control object. */ 1613 if (IS_CTL_NAME(tdvp, nm, len)) { 1614 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1615 return(EACCES); 1616 } 1617 1618 if (plen+1 > CODA_MAXPATHLEN) { 1619 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1620 return(EINVAL); 1621 } 1622 1623 if (len+1 > CODA_MAXNAMLEN) { 1624 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1625 error = EINVAL; 1626 goto exit; 1627 } 1628 1629 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, p); 1630 1631 /* Invalidate the parent's attr cache, the modification time has changed */ 1632 tdcp->c_flags &= ~C_VATTR; 1633 1634 if (!error) { 1635 /* 1636 * VOP_SYMLINK is not defined to pay attention to cnp->cn_flags; 1637 * these are defined only for VOP_LOOKUP. We desire to reuse 1638 * cnp for a VOP_LOOKUP operation, and must be sure to not pass 1639 * stray flags passed to us. Such stray flags can occur because 1640 * sys_symlink makes a namei call and then reuses the 1641 * componentname structure. 1642 */ 1643 /* 1644 * XXX Arguably we should create our own componentname structure 1645 * and not reuse the one that was passed in. 1646 */ 1647 saved_cn_flags = cnp->cn_flags; 1648 cnp->cn_flags &= ~(MODMASK | OPMASK); 1649 cnp->cn_flags |= LOOKUP; 1650 error = VOP_LOOKUP(tdvp, ap->a_vpp, cnp); 1651 cnp->cn_flags = saved_cn_flags; 1652 /* Either an error occurs, or ap->a_vpp is locked. */ 1653 } else { 1654 /* error, so unlock and deference parent */ 1655 vput(tdvp); 1656 } 1657 1658 exit: 1659 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) 1660 return(error); 1661 } 1662 1663 /* 1664 * Read directory entries. 1665 */ 1666 int 1667 coda_readdir(v) 1668 void *v; 1669 { 1670 /* true args */ 1671 struct vop_readdir_args *ap = v; 1672 struct vnode *vp = ap->a_vp; 1673 struct cnode *cp = VTOC(vp); 1674 struct uio *uiop = ap->a_uio; 1675 struct ucred *cred = ap->a_cred; 1676 int *eofflag = ap->a_eofflag; 1677 off_t **cookies = ap->a_cookies; 1678 int *ncookies = ap->a_ncookies; 1679 struct proc *p = ap->a_uio->uio_procp; 1680 /* upcall decl */ 1681 /* locals */ 1682 int error = 0; 1683 1684 MARK_ENTRY(CODA_READDIR_STATS); 1685 1686 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)); ) 1687 1688 /* Check for readdir of control object. */ 1689 if (IS_CTL_VP(vp)) { 1690 MARK_INT_FAIL(CODA_READDIR_STATS); 1691 return(ENOENT); 1692 } 1693 1694 { 1695 /* Redirect the request to UFS. */ 1696 1697 /* If directory is not already open do an "internal open" on it. */ 1698 int opened_internally = 0; 1699 if (cp->c_ovp == NULL) { 1700 opened_internally = 1; 1701 MARK_INT_GEN(CODA_OPEN_STATS); 1702 error = VOP_OPEN(vp, FREAD, cred, p); 1703 #ifdef CODA_VERBOSE 1704 printf("coda_readdir: Internally Opening %p\n", vp); 1705 #endif 1706 if (error) return(error); 1707 } 1708 1709 /* Have UFS handle the call. */ 1710 CODADEBUG(CODA_READDIR, myprintf(( 1711 "indirect readdir: fid = %s, refcnt = %d\n", 1712 coda_f2s(&cp->c_fid), vp->v_usecount)); ) 1713 error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, cookies, 1714 ncookies); 1715 if (error) 1716 MARK_INT_FAIL(CODA_READDIR_STATS); 1717 else 1718 MARK_INT_SAT(CODA_READDIR_STATS); 1719 1720 /* Do an "internal close" if necessary. */ 1721 if (opened_internally) { 1722 MARK_INT_GEN(CODA_CLOSE_STATS); 1723 (void)VOP_CLOSE(vp, FREAD, cred, p); 1724 } 1725 } 1726 1727 return(error); 1728 } 1729 1730 /* 1731 * Convert from file system blocks to device blocks 1732 */ 1733 int 1734 coda_bmap(v) 1735 void *v; 1736 { 1737 /* XXX on the global proc */ 1738 /* true args */ 1739 struct vop_bmap_args *ap = v; 1740 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */ 1741 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */ 1742 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */ 1743 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */ 1744 struct proc *p __attribute__((unused)) = curproc; 1745 /* upcall decl */ 1746 /* locals */ 1747 1748 *vpp = (struct vnode *)0; 1749 myprintf(("coda_bmap called!\n")); 1750 return(EINVAL); 1751 } 1752 1753 /* 1754 * I don't think the following two things are used anywhere, so I've 1755 * commented them out 1756 * 1757 * struct buf *async_bufhead; 1758 * int async_daemon_count; 1759 */ 1760 int 1761 coda_strategy(v) 1762 void *v; 1763 { 1764 /* true args */ 1765 struct vop_strategy_args *ap = v; 1766 struct buf *bp __attribute__((unused)) = ap->a_bp; 1767 struct proc *p __attribute__((unused)) = curproc; 1768 /* upcall decl */ 1769 /* locals */ 1770 1771 myprintf(("coda_strategy called! ")); 1772 return(EINVAL); 1773 } 1774 1775 int 1776 coda_reclaim(v) 1777 void *v; 1778 { 1779 /* true args */ 1780 struct vop_reclaim_args *ap = v; 1781 struct vnode *vp = ap->a_vp; 1782 struct cnode *cp = VTOC(vp); 1783 /* upcall decl */ 1784 /* locals */ 1785 1786 /* 1787 * Forced unmount/flush will let vnodes with non zero use be destroyed! 1788 */ 1789 ENTRY; 1790 1791 if (IS_UNMOUNTING(cp)) { 1792 #ifdef DEBUG 1793 if (VTOC(vp)->c_ovp) { 1794 if (IS_UNMOUNTING(cp)) 1795 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp); 1796 } 1797 #endif 1798 } else { 1799 #ifdef OLD_DIAGNOSTIC 1800 if (vp->v_usecount != 0) 1801 print("coda_reclaim: pushing active %p\n", vp); 1802 if (VTOC(vp)->c_ovp) { 1803 panic("coda_reclaim: c_ovp not void"); 1804 } 1805 #endif 1806 } 1807 cache_purge(vp); 1808 coda_free(VTOC(vp)); 1809 SET_VTOC(vp) = NULL; 1810 return (0); 1811 } 1812 1813 int 1814 coda_lock(v) 1815 void *v; 1816 { 1817 /* true args */ 1818 struct vop_lock_args *ap = v; 1819 struct vnode *vp = ap->a_vp; 1820 struct cnode *cp = VTOC(vp); 1821 /* upcall decl */ 1822 /* locals */ 1823 1824 ENTRY; 1825 1826 if (coda_lockdebug) { 1827 myprintf(("Attempting lock on %s\n", 1828 coda_f2s(&cp->c_fid))); 1829 } 1830 1831 return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock)); 1832 } 1833 1834 int 1835 coda_unlock(v) 1836 void *v; 1837 { 1838 /* true args */ 1839 struct vop_unlock_args *ap = v; 1840 struct vnode *vp = ap->a_vp; 1841 struct cnode *cp = VTOC(vp); 1842 /* upcall decl */ 1843 /* locals */ 1844 1845 ENTRY; 1846 if (coda_lockdebug) { 1847 myprintf(("Attempting unlock on %s\n", 1848 coda_f2s(&cp->c_fid))); 1849 } 1850 1851 return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock)); 1852 } 1853 1854 int 1855 coda_islocked(v) 1856 void *v; 1857 { 1858 /* true args */ 1859 struct vop_islocked_args *ap = v; 1860 ENTRY; 1861 1862 return (lockstatus(&ap->a_vp->v_lock)); 1863 } 1864 1865 /* How one looks up a vnode given a device/inode pair: */ 1866 int 1867 coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp) 1868 { 1869 /* This is like VFS_VGET() or igetinode()! */ 1870 int error; 1871 struct mount *mp; 1872 1873 if (!(mp = devtomp(dev))) { 1874 myprintf(("coda_grab_vnode: devtomp(%d) returns NULL\n", dev)); 1875 return(ENXIO); 1876 } 1877 1878 /* XXX - ensure that nonzero-return means failure */ 1879 error = VFS_VGET(mp,ino,vpp); 1880 if (error) { 1881 myprintf(("coda_grab_vnode: iget/vget(%d, %llu) returns %p, err %d\n", 1882 dev, (unsigned long long)ino, *vpp, error)); 1883 return(ENOENT); 1884 } 1885 return(0); 1886 } 1887 1888 void 1889 print_vattr( attr ) 1890 struct vattr *attr; 1891 { 1892 const char *typestr; 1893 1894 switch (attr->va_type) { 1895 case VNON: 1896 typestr = "VNON"; 1897 break; 1898 case VREG: 1899 typestr = "VREG"; 1900 break; 1901 case VDIR: 1902 typestr = "VDIR"; 1903 break; 1904 case VBLK: 1905 typestr = "VBLK"; 1906 break; 1907 case VCHR: 1908 typestr = "VCHR"; 1909 break; 1910 case VLNK: 1911 typestr = "VLNK"; 1912 break; 1913 case VSOCK: 1914 typestr = "VSCK"; 1915 break; 1916 case VFIFO: 1917 typestr = "VFFO"; 1918 break; 1919 case VBAD: 1920 typestr = "VBAD"; 1921 break; 1922 default: 1923 typestr = "????"; 1924 break; 1925 } 1926 1927 1928 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", 1929 typestr, (int)attr->va_mode, (int)attr->va_uid, 1930 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); 1931 1932 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", 1933 (int)attr->va_fileid, (int)attr->va_nlink, 1934 (int)attr->va_size, 1935 (int)attr->va_blocksize,(int)attr->va_bytes)); 1936 myprintf((" gen %ld flags %ld vaflags %d\n", 1937 attr->va_gen, attr->va_flags, attr->va_vaflags)); 1938 myprintf((" atime sec %d nsec %d\n", 1939 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); 1940 myprintf((" mtime sec %d nsec %d\n", 1941 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); 1942 myprintf((" ctime sec %d nsec %d\n", 1943 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); 1944 } 1945 1946 /* How to print a ucred */ 1947 void 1948 print_cred(cred) 1949 struct ucred *cred; 1950 { 1951 1952 int i; 1953 1954 myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid)); 1955 1956 for (i=0; i < cred->cr_ngroups; i++) 1957 myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i])); 1958 myprintf(("\n")); 1959 1960 } 1961 1962 /* 1963 * Return a vnode for the given fid. 1964 * If no cnode exists for this fid create one and put it 1965 * in a table hashed by coda_f2i(). If the cnode for 1966 * this fid is already in the table return it (ref count is 1967 * incremented by coda_find. The cnode will be flushed from the 1968 * table when coda_inactive calls coda_unsave. 1969 */ 1970 struct cnode * 1971 make_coda_node(fid, vfsp, type) 1972 CodaFid *fid; struct mount *vfsp; short type; 1973 { 1974 struct cnode *cp; 1975 int err; 1976 1977 if ((cp = coda_find(fid)) == NULL) { 1978 struct vnode *vp; 1979 1980 cp = coda_alloc(); 1981 cp->c_fid = *fid; 1982 1983 err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp); 1984 if (err) { 1985 panic("coda: getnewvnode returned error %d", err); 1986 } 1987 vp->v_data = cp; 1988 vp->v_type = type; 1989 cp->c_vnode = vp; 1990 coda_save(cp); 1991 1992 } else { 1993 vref(CTOV(cp)); 1994 } 1995 1996 return cp; 1997 } 1998 1999 int 2000 coda_getpages(v) 2001 void *v; 2002 { 2003 struct vop_getpages_args /* { 2004 struct vnode *a_vp; 2005 voff_t a_offset; 2006 struct vm_page **a_m; 2007 int *a_count; 2008 int a_centeridx; 2009 vm_prot_t a_access_type; 2010 int a_advice; 2011 int a_flags; 2012 } */ *ap = v; 2013 struct vnode *vp = ap->a_vp; 2014 struct cnode *cp = VTOC(vp); 2015 struct proc *p = curproc; 2016 struct ucred *cred = p->p_ucred; 2017 int error; 2018 2019 /* Check for control object. */ 2020 if (IS_CTL_VP(vp)) { 2021 return(EINVAL); 2022 } 2023 2024 error = VOP_OPEN(vp, FREAD, cred, p); 2025 if (error) { 2026 return error; 2027 } 2028 ap->a_vp = cp->c_ovp; 2029 error = VOCALL(ap->a_vp->v_op, VOFFSET(vop_getpages), ap); 2030 (void) VOP_CLOSE(vp, FREAD, cred, p); 2031 return error; 2032 } 2033 2034 int 2035 coda_putpages(v) 2036 void *v; 2037 { 2038 struct vop_putpages_args /* { 2039 struct vnode *a_vp; 2040 voff_t a_offlo; 2041 voff_t a_offhi; 2042 int a_flags; 2043 } */ *ap = v; 2044 struct vnode *vp = ap->a_vp; 2045 2046 simple_unlock(&vp->v_interlock); 2047 2048 /* Check for control object. */ 2049 if (IS_CTL_VP(vp)) { 2050 return(EINVAL); 2051 } 2052 2053 /* 2054 * XXX 2055 * we'd like to do something useful here for msync(), 2056 * but that turns out to be hard. 2057 */ 2058 2059 return 0; 2060 } 2061
Indexes created Tue Oct 14 15:09:51 GMT 2025