coda_vnops.c revision 1.47.2.2
1 /* 2 coda_create/vn_open 3 remove/unlink 4 link 5 mkdir 6 rmdir 7 symlink 8 */ 9 /* $NetBSD: coda_vnops.c,v 1.47.2.2 2006/08/11 15:43:16 yamt 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 1.47.2.2 2006/08/11 15:43:16 yamt 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 <sys/kauth.h> 73 74 #include <miscfs/genfs/genfs.h> 75 76 #include <coda/coda.h> 77 #include <coda/cnode.h> 78 #include <coda/coda_vnops.h> 79 #include <coda/coda_venus.h> 80 #include <coda/coda_opstats.h> 81 #include <coda/coda_subr.h> 82 #include <coda/coda_namecache.h> 83 #include <coda/coda_pioctl.h> 84 85 /* 86 * These flags select various performance enhancements. 87 */ 88 int coda_attr_cache = 1; /* Set to cache attributes in the kernel */ 89 int coda_symlink_cache = 1; /* Set to cache symbolic link information */ 90 int coda_access_cache = 1; /* Set to handle some access checks directly */ 91 92 /* structure to keep track of vfs calls */ 93 94 struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE]; 95 96 #define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++) 97 #define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++) 98 #define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++) 99 #define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++) 100 101 /* What we are delaying for in printf */ 102 int coda_printf_delay = 0; /* in microseconds */ 103 int coda_vnop_print_entry = 0; 104 static int coda_lockdebug = 0; 105 106 /* Definition of the vfs operation vector */ 107 108 /* 109 * Some NetBSD details: 110 * 111 * coda_start is called at the end of the mount syscall. 112 * coda_init is called at boot time. 113 */ 114 115 #define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__func__)) 116 117 /* Definition of the vnode operation vector */ 118 119 const struct vnodeopv_entry_desc coda_vnodeop_entries[] = { 120 { &vop_default_desc, coda_vop_error }, 121 { &vop_lookup_desc, coda_lookup }, /* lookup */ 122 { &vop_create_desc, coda_create }, /* create */ 123 { &vop_mknod_desc, coda_vop_error }, /* mknod */ 124 { &vop_open_desc, coda_open }, /* open */ 125 { &vop_close_desc, coda_close }, /* close */ 126 { &vop_access_desc, coda_access }, /* access */ 127 { &vop_getattr_desc, coda_getattr }, /* getattr */ 128 { &vop_setattr_desc, coda_setattr }, /* setattr */ 129 { &vop_read_desc, coda_read }, /* read */ 130 { &vop_write_desc, coda_write }, /* write */ 131 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 132 { &vop_ioctl_desc, coda_ioctl }, /* ioctl */ 133 /* 1.3 { &vop_select_desc, coda_select }, select */ 134 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 135 { &vop_fsync_desc, coda_fsync }, /* fsync */ 136 { &vop_remove_desc, coda_remove }, /* remove */ 137 { &vop_link_desc, coda_link }, /* link */ 138 { &vop_rename_desc, coda_rename }, /* rename */ 139 { &vop_mkdir_desc, coda_mkdir }, /* mkdir */ 140 { &vop_rmdir_desc, coda_rmdir }, /* rmdir */ 141 { &vop_symlink_desc, coda_symlink }, /* symlink */ 142 { &vop_readdir_desc, coda_readdir }, /* readdir */ 143 { &vop_readlink_desc, coda_readlink }, /* readlink */ 144 { &vop_abortop_desc, coda_abortop }, /* abortop */ 145 { &vop_inactive_desc, coda_inactive }, /* inactive */ 146 { &vop_reclaim_desc, coda_reclaim }, /* reclaim */ 147 { &vop_lock_desc, coda_lock }, /* lock */ 148 { &vop_unlock_desc, coda_unlock }, /* unlock */ 149 { &vop_bmap_desc, coda_bmap }, /* bmap */ 150 { &vop_strategy_desc, coda_strategy }, /* strategy */ 151 { &vop_print_desc, coda_vop_error }, /* print */ 152 { &vop_islocked_desc, coda_islocked }, /* islocked */ 153 { &vop_pathconf_desc, coda_vop_error }, /* pathconf */ 154 { &vop_advlock_desc, coda_vop_nop }, /* advlock */ 155 { &vop_bwrite_desc, coda_vop_error }, /* bwrite */ 156 { &vop_lease_desc, coda_vop_nop }, /* lease */ 157 { &vop_seek_desc, genfs_seek }, /* seek */ 158 { &vop_poll_desc, genfs_poll }, /* poll */ 159 { &vop_getpages_desc, coda_getpages }, /* getpages */ 160 { &vop_putpages_desc, coda_putpages }, /* putpages */ 161 { NULL, NULL } 162 }; 163 164 const struct vnodeopv_desc coda_vnodeop_opv_desc = 165 { &coda_vnodeop_p, coda_vnodeop_entries }; 166 167 /* Definitions of NetBSD vnodeop interfaces */ 168 169 /* A generic panic: we were called with something we didn't define yet */ 170 int 171 coda_vop_error(void *anon) { 172 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 173 174 myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n", 175 (*desc)->vdesc_name)); 176 /* 177 panic("coda_nbsd_vop_error"); 178 return 0; 179 */ 180 return EIO; 181 } 182 183 /* A generic do-nothing. For lease_check, advlock */ 184 int 185 coda_vop_nop(void *anon) { 186 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 187 188 if (codadebug) { 189 myprintf(("Vnode operation %s called, but unsupported\n", 190 (*desc)->vdesc_name)); 191 } 192 return (0); 193 } 194 195 int 196 coda_vnodeopstats_init(void) 197 { 198 int i; 199 200 for(i=0;i<CODA_VNODEOPS_SIZE;i++) { 201 coda_vnodeopstats[i].opcode = i; 202 coda_vnodeopstats[i].entries = 0; 203 coda_vnodeopstats[i].sat_intrn = 0; 204 coda_vnodeopstats[i].unsat_intrn = 0; 205 coda_vnodeopstats[i].gen_intrn = 0; 206 } 207 208 return 0; 209 } 210 211 /* 212 * coda_open calls Venus to return the device, inode pair of the cache 213 * file holding the data. Using iget, coda_open finds the vnode of the 214 * cache file, and then opens it. 215 */ 216 int 217 coda_open(void *v) 218 { 219 /* 220 * NetBSD can pass the O_EXCL flag in mode, even though the check 221 * has already happened. Venus defensively assumes that if open 222 * is passed the EXCL, it must be a bug. We strip the flag here. 223 */ 224 /* true args */ 225 struct vop_open_args *ap = v; 226 struct vnode **vpp = &(ap->a_vp); 227 struct cnode *cp = VTOC(*vpp); 228 int flag = ap->a_mode & (~O_EXCL); 229 kauth_cred_t cred = ap->a_cred; 230 struct lwp *l = ap->a_l; 231 /* locals */ 232 int error; 233 struct vnode *vp; 234 dev_t dev; 235 ino_t inode; 236 237 MARK_ENTRY(CODA_OPEN_STATS); 238 239 /* Check for open of control file. */ 240 if (IS_CTL_VP(*vpp)) { 241 /* XXX */ 242 /* if (WRITABLE(flag)) */ 243 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) { 244 MARK_INT_FAIL(CODA_OPEN_STATS); 245 return(EACCES); 246 } 247 MARK_INT_SAT(CODA_OPEN_STATS); 248 return(0); 249 } 250 251 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, l, &dev, &inode); 252 if (error) 253 return (error); 254 if (!error) { 255 CODADEBUG( CODA_OPEN,myprintf(("open: dev %d inode %llu result %d\n", 256 dev, (unsigned long long)inode, error)); ) 257 } 258 259 /* Translate the <device, inode> pair for the cache file into 260 an inode pointer. */ 261 error = coda_grab_vnode(dev, inode, &vp); 262 if (error) 263 return (error); 264 265 /* We get the vnode back locked in both Mach and NetBSD. Needs unlocked */ 266 VOP_UNLOCK(vp, 0); 267 /* Keep a reference until the close comes in. */ 268 vref(*vpp); 269 270 /* Save the vnode pointer for the cache file. */ 271 if (cp->c_ovp == NULL) { 272 cp->c_ovp = vp; 273 } else { 274 if (cp->c_ovp != vp) 275 panic("coda_open: cp->c_ovp != ITOV(ip)"); 276 } 277 cp->c_ocount++; 278 279 /* Flush the attribute cached if writing the file. */ 280 if (flag & FWRITE) { 281 cp->c_owrite++; 282 cp->c_flags &= ~C_VATTR; 283 } 284 285 /* Save the <device, inode> pair for the cache file to speed 286 up subsequent page_read's. */ 287 cp->c_device = dev; 288 cp->c_inode = inode; 289 290 /* Open the cache file. */ 291 error = VOP_OPEN(vp, flag, cred, l); 292 return(error); 293 } 294 295 /* 296 * Close the cache file used for I/O and notify Venus. 297 */ 298 int 299 coda_close(void *v) 300 { 301 /* true args */ 302 struct vop_close_args *ap = v; 303 struct vnode *vp = ap->a_vp; 304 struct cnode *cp = VTOC(vp); 305 int flag = ap->a_fflag; 306 kauth_cred_t cred = ap->a_cred; 307 struct lwp *l = ap->a_l; 308 /* locals */ 309 int error; 310 311 MARK_ENTRY(CODA_CLOSE_STATS); 312 313 /* Check for close of control file. */ 314 if (IS_CTL_VP(vp)) { 315 MARK_INT_SAT(CODA_CLOSE_STATS); 316 return(0); 317 } 318 319 if (IS_UNMOUNTING(cp)) { 320 if (cp->c_ovp) { 321 #ifdef CODA_VERBOSE 322 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n", 323 vp->v_usecount, cp->c_ovp, vp, cp); 324 #endif 325 #ifdef hmm 326 vgone(cp->c_ovp); 327 #else 328 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY); 329 VOP_CLOSE(cp->c_ovp, flag, cred, l); /* Do errors matter here? */ 330 vput(cp->c_ovp); 331 #endif 332 } else { 333 #ifdef CODA_VERBOSE 334 printf("coda_close: NO container vp %p/cp %p\n", vp, cp); 335 #endif 336 } 337 return ENODEV; 338 } else { 339 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY); 340 VOP_CLOSE(cp->c_ovp, flag, cred, l); /* Do errors matter here? */ 341 vput(cp->c_ovp); 342 } 343 344 if (--cp->c_ocount == 0) 345 cp->c_ovp = NULL; 346 347 if (flag & FWRITE) /* file was opened for write */ 348 --cp->c_owrite; 349 350 error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, l); 351 vrele(CTOV(cp)); 352 353 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); ) 354 return(error); 355 } 356 357 int 358 coda_read(void *v) 359 { 360 struct vop_read_args *ap = v; 361 362 ENTRY; 363 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ, 364 ap->a_ioflag, ap->a_cred, curlwp)); 365 } 366 367 int 368 coda_write(void *v) 369 { 370 struct vop_write_args *ap = v; 371 372 ENTRY; 373 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE, 374 ap->a_ioflag, ap->a_cred, curlwp)); 375 } 376 377 int 378 coda_rdwr(struct vnode *vp, struct uio *uiop, enum uio_rw rw, int ioflag, 379 kauth_cred_t cred, struct lwp *l) 380 { 381 /* upcall decl */ 382 /* NOTE: container file operation!!! */ 383 /* locals */ 384 struct cnode *cp = VTOC(vp); 385 struct vnode *cfvp = cp->c_ovp; 386 struct proc *p = l->l_proc; 387 int opened_internally = 0; 388 int error = 0; 389 390 MARK_ENTRY(CODA_RDWR_STATS); 391 392 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %lu, %lld)\n", rw, 393 uiop->uio_iov->iov_base, 394 (unsigned long) uiop->uio_resid, 395 (long long) uiop->uio_offset)); ) 396 397 /* Check for rdwr of control object. */ 398 if (IS_CTL_VP(vp)) { 399 MARK_INT_FAIL(CODA_RDWR_STATS); 400 return(EINVAL); 401 } 402 403 /* Redirect the request to UFS. */ 404 405 /* 406 * If file is not already open this must be a page 407 * {read,write} request. Iget the cache file's inode 408 * pointer if we still have its <device, inode> pair. 409 * Otherwise, we must do an internal open to derive the 410 * pair. 411 */ 412 if (cfvp == NULL) { 413 /* 414 * If we're dumping core, do the internal open. Otherwise 415 * venus won't have the correct size of the core when 416 * it's completely written. 417 */ 418 if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 419 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp); 420 if (error) { 421 MARK_INT_FAIL(CODA_RDWR_STATS); 422 return(error); 423 } 424 /* 425 * We get the vnode back locked in both Mach and 426 * NetBSD. Needs unlocked 427 */ 428 VOP_UNLOCK(cfvp, 0); 429 } 430 else { 431 opened_internally = 1; 432 MARK_INT_GEN(CODA_OPEN_STATS); 433 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), 434 cred, l); 435 #ifdef CODA_VERBOSE 436 printf("coda_rdwr: Internally Opening %p\n", vp); 437 #endif 438 if (error) { 439 MARK_INT_FAIL(CODA_RDWR_STATS); 440 return(error); 441 } 442 cfvp = cp->c_ovp; 443 } 444 } 445 446 /* Have UFS handle the call. */ 447 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = %s, refcnt = %d\n", 448 coda_f2s(&cp->c_fid), CTOV(cp)->v_usecount)); ) 449 450 if (rw == UIO_READ) { 451 error = VOP_READ(cfvp, uiop, ioflag, cred); 452 } else { 453 error = VOP_WRITE(cfvp, uiop, ioflag, cred); 454 } 455 456 if (error) 457 MARK_INT_FAIL(CODA_RDWR_STATS); 458 else 459 MARK_INT_SAT(CODA_RDWR_STATS); 460 461 /* Do an internal close if necessary. */ 462 if (opened_internally) { 463 MARK_INT_GEN(CODA_CLOSE_STATS); 464 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, l); 465 } 466 467 /* Invalidate cached attributes if writing. */ 468 if (rw == UIO_WRITE) 469 cp->c_flags &= ~C_VATTR; 470 return(error); 471 } 472 473 int 474 coda_ioctl(void *v) 475 { 476 /* true args */ 477 struct vop_ioctl_args *ap = v; 478 struct vnode *vp = ap->a_vp; 479 int com = ap->a_command; 480 caddr_t data = ap->a_data; 481 int flag = ap->a_fflag; 482 kauth_cred_t cred = ap->a_cred; 483 struct lwp *l = ap->a_l; 484 /* locals */ 485 int error; 486 struct vnode *tvp; 487 struct nameidata ndp; 488 struct PioctlData *iap = (struct PioctlData *)data; 489 490 MARK_ENTRY(CODA_IOCTL_STATS); 491 492 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));) 493 494 /* Don't check for operation on a dying object, for ctlvp it 495 shouldn't matter */ 496 497 /* Must be control object to succeed. */ 498 if (!IS_CTL_VP(vp)) { 499 MARK_INT_FAIL(CODA_IOCTL_STATS); 500 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));) 501 return (EOPNOTSUPP); 502 } 503 /* Look up the pathname. */ 504 505 /* Should we use the name cache here? It would get it from 506 lookupname sooner or later anyway, right? */ 507 508 NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, 509 iap->path, l); 510 error = namei(&ndp); 511 tvp = ndp.ni_vp; 512 513 if (error) { 514 MARK_INT_FAIL(CODA_IOCTL_STATS); 515 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n", 516 error));) 517 return(error); 518 } 519 520 /* 521 * Make sure this is a coda style cnode, but it may be a 522 * different vfsp 523 */ 524 /* XXX: this totally violates the comment about vtagtype in vnode.h */ 525 if (tvp->v_tag != VT_CODA) { 526 vrele(tvp); 527 MARK_INT_FAIL(CODA_IOCTL_STATS); 528 CODADEBUG(CODA_IOCTL, 529 myprintf(("coda_ioctl error: %s not a coda object\n", 530 iap->path));) 531 return(EINVAL); 532 } 533 534 if (iap->vi.in_size > VC_MAXDATASIZE) { 535 vrele(tvp); 536 return(EINVAL); 537 } 538 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, l); 539 540 if (error) 541 MARK_INT_FAIL(CODA_IOCTL_STATS); 542 else 543 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) 544 545 vrele(tvp); 546 return(error); 547 } 548 549 /* 550 * To reduce the cost of a user-level venus;we cache attributes in 551 * the kernel. Each cnode has storage allocated for an attribute. If 552 * c_vattr is valid, return a reference to it. Otherwise, get the 553 * attributes from venus and store them in the cnode. There is some 554 * question if this method is a security leak. But I think that in 555 * order to make this call, the user must have done a lookup and 556 * opened the file, and therefore should already have access. 557 */ 558 int 559 coda_getattr(void *v) 560 { 561 /* true args */ 562 struct vop_getattr_args *ap = v; 563 struct vnode *vp = ap->a_vp; 564 struct cnode *cp = VTOC(vp); 565 struct vattr *vap = ap->a_vap; 566 kauth_cred_t cred = ap->a_cred; 567 struct lwp *l = ap->a_l; 568 /* locals */ 569 int error; 570 571 MARK_ENTRY(CODA_GETATTR_STATS); 572 573 /* Check for getattr of control object. */ 574 if (IS_CTL_VP(vp)) { 575 MARK_INT_FAIL(CODA_GETATTR_STATS); 576 return(ENOENT); 577 } 578 579 /* Check to see if the attributes have already been cached */ 580 if (VALID_VATTR(cp)) { 581 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: %s\n", 582 coda_f2s(&cp->c_fid)));}); 583 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 584 print_vattr(&cp->c_vattr); ); 585 586 *vap = cp->c_vattr; 587 MARK_INT_SAT(CODA_GETATTR_STATS); 588 return(0); 589 } 590 591 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, l, vap); 592 593 if (!error) { 594 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss %s: result %d\n", 595 coda_f2s(&cp->c_fid), error)); ) 596 597 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 598 print_vattr(vap); ); 599 600 /* If not open for write, store attributes in cnode */ 601 if ((cp->c_owrite == 0) && (coda_attr_cache)) { 602 cp->c_vattr = *vap; 603 cp->c_flags |= C_VATTR; 604 } 605 606 } 607 return(error); 608 } 609 610 int 611 coda_setattr(void *v) 612 { 613 /* true args */ 614 struct vop_setattr_args *ap = v; 615 struct vnode *vp = ap->a_vp; 616 struct cnode *cp = VTOC(vp); 617 struct vattr *vap = ap->a_vap; 618 kauth_cred_t cred = ap->a_cred; 619 struct lwp *l = ap->a_l; 620 /* locals */ 621 int error; 622 623 MARK_ENTRY(CODA_SETATTR_STATS); 624 625 /* Check for setattr of control object. */ 626 if (IS_CTL_VP(vp)) { 627 MARK_INT_FAIL(CODA_SETATTR_STATS); 628 return(ENOENT); 629 } 630 631 if (codadebug & CODADBGMSK(CODA_SETATTR)) { 632 print_vattr(vap); 633 } 634 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, l); 635 636 if (!error) 637 cp->c_flags &= ~C_VATTR; 638 639 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); ) 640 return(error); 641 } 642 643 int 644 coda_access(void *v) 645 { 646 /* true args */ 647 struct vop_access_args *ap = v; 648 struct vnode *vp = ap->a_vp; 649 struct cnode *cp = VTOC(vp); 650 int mode = ap->a_mode; 651 kauth_cred_t cred = ap->a_cred; 652 struct lwp *l = ap->a_l; 653 /* locals */ 654 int error; 655 656 MARK_ENTRY(CODA_ACCESS_STATS); 657 658 /* Check for access of control object. Only read access is 659 allowed on it. */ 660 if (IS_CTL_VP(vp)) { 661 /* bogus hack - all will be marked as successes */ 662 MARK_INT_SAT(CODA_ACCESS_STATS); 663 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 664 ? 0 : EACCES); 665 } 666 667 /* 668 * if the file is a directory, and we are checking exec (eg lookup) 669 * access, and the file is in the namecache, then the user must have 670 * lookup access to it. 671 */ 672 if (coda_access_cache) { 673 if ((vp->v_type == VDIR) && (mode & VEXEC)) { 674 if (coda_nc_lookup(cp, ".", 1, cred)) { 675 MARK_INT_SAT(CODA_ACCESS_STATS); 676 return(0); /* it was in the cache */ 677 } 678 } 679 } 680 681 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, l); 682 683 return(error); 684 } 685 686 /* 687 * CODA abort op, called after namei() when a CREATE/DELETE isn't actually 688 * done. If a buffer has been saved in anticipation of a coda_create or 689 * a coda_remove, delete it. 690 */ 691 /* ARGSUSED */ 692 int 693 coda_abortop(void *v) 694 { 695 /* true args */ 696 struct vop_abortop_args /* { 697 struct vnode *a_dvp; 698 struct componentname *a_cnp; 699 } */ *ap = v; 700 /* upcall decl */ 701 /* locals */ 702 703 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 704 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 705 return (0); 706 } 707 708 int 709 coda_readlink(void *v) 710 { 711 /* true args */ 712 struct vop_readlink_args *ap = v; 713 struct vnode *vp = ap->a_vp; 714 struct cnode *cp = VTOC(vp); 715 struct uio *uiop = ap->a_uio; 716 kauth_cred_t cred = ap->a_cred; 717 /* locals */ 718 struct lwp *l = curlwp; 719 int error; 720 char *str; 721 int len; 722 723 MARK_ENTRY(CODA_READLINK_STATS); 724 725 /* Check for readlink of control object. */ 726 if (IS_CTL_VP(vp)) { 727 MARK_INT_FAIL(CODA_READLINK_STATS); 728 return(ENOENT); 729 } 730 731 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ 732 uiop->uio_rw = UIO_READ; 733 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); 734 if (error) 735 MARK_INT_FAIL(CODA_READLINK_STATS); 736 else 737 MARK_INT_SAT(CODA_READLINK_STATS); 738 return(error); 739 } 740 741 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, l, &str, &len); 742 743 if (!error) { 744 uiop->uio_rw = UIO_READ; 745 error = uiomove(str, len, uiop); 746 747 if (coda_symlink_cache) { 748 cp->c_symlink = str; 749 cp->c_symlen = len; 750 cp->c_flags |= C_SYMLINK; 751 } else 752 CODA_FREE(str, len); 753 } 754 755 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) 756 return(error); 757 } 758 759 int 760 coda_fsync(void *v) 761 { 762 /* true args */ 763 struct vop_fsync_args *ap = v; 764 struct vnode *vp = ap->a_vp; 765 struct cnode *cp = VTOC(vp); 766 kauth_cred_t cred = ap->a_cred; 767 struct lwp *l = ap->a_l; 768 /* locals */ 769 struct vnode *convp = cp->c_ovp; 770 int error; 771 772 MARK_ENTRY(CODA_FSYNC_STATS); 773 774 /* Check for fsync on an unmounting object */ 775 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync 776 * after an unmount has been initiated. This is a Bad Thing, 777 * which we have to avoid. Not a legitimate failure for stats. 778 */ 779 if (IS_UNMOUNTING(cp)) { 780 return(ENODEV); 781 } 782 783 /* Check for fsync of control object. */ 784 if (IS_CTL_VP(vp)) { 785 MARK_INT_SAT(CODA_FSYNC_STATS); 786 return(0); 787 } 788 789 if (convp) 790 VOP_FSYNC(convp, cred, MNT_WAIT, 0, 0, l); 791 792 /* 793 * We can expect fsync on any vnode at all if venus is pruging it. 794 * Venus can't very well answer the fsync request, now can it? 795 * Hopefully, it won't have to, because hopefully, venus preserves 796 * the (possibly untrue) invariant that it never purges an open 797 * vnode. Hopefully. 798 */ 799 if (cp->c_flags & C_PURGING) { 800 return(0); 801 } 802 803 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, l); 804 805 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ); 806 return(error); 807 } 808 809 int 810 coda_inactive(void *v) 811 { 812 /* XXX - at the moment, inactive doesn't look at cred, and doesn't 813 have a proc pointer. Oops. */ 814 /* true args */ 815 struct vop_inactive_args *ap = v; 816 struct vnode *vp = ap->a_vp; 817 struct cnode *cp = VTOC(vp); 818 kauth_cred_t cred __attribute__((unused)) = NULL; 819 struct lwp *l __attribute__((unused)) = curlwp; 820 /* upcall decl */ 821 /* locals */ 822 823 /* We don't need to send inactive to venus - DCS */ 824 MARK_ENTRY(CODA_INACTIVE_STATS); 825 826 if (IS_CTL_VP(vp)) { 827 MARK_INT_SAT(CODA_INACTIVE_STATS); 828 return 0; 829 } 830 831 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %s, vfsp %p\n", 832 coda_f2s(&cp->c_fid), vp->v_mount));) 833 834 /* If an array has been allocated to hold the symlink, deallocate it */ 835 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { 836 if (cp->c_symlink == NULL) 837 panic("coda_inactive: null symlink pointer in cnode"); 838 839 CODA_FREE(cp->c_symlink, cp->c_symlen); 840 cp->c_flags &= ~C_SYMLINK; 841 cp->c_symlen = 0; 842 } 843 844 /* Remove it from the table so it can't be found. */ 845 coda_unsave(cp); 846 if (vp->v_mount->mnt_data == NULL) { 847 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); 848 panic("badness in coda_inactive"); 849 } 850 851 if (IS_UNMOUNTING(cp)) { 852 #ifdef DEBUG 853 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp); 854 if (cp->c_ovp != NULL) 855 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n", 856 vp->v_usecount, vp, cp); 857 #endif 858 lockmgr(&vp->v_lock, LK_RELEASE, &vp->v_interlock); 859 } else { 860 #ifdef OLD_DIAGNOSTIC 861 if (CTOV(cp)->v_usecount) { 862 panic("coda_inactive: nonzero reference count"); 863 } 864 if (cp->c_ovp != NULL) { 865 panic("coda_inactive: cp->ovp != NULL"); 866 } 867 #endif 868 VOP_UNLOCK(vp, 0); 869 vgone(vp); 870 } 871 872 MARK_INT_SAT(CODA_INACTIVE_STATS); 873 return(0); 874 } 875 876 /* 877 * Remote file system operations having to do with directory manipulation. 878 */ 879 880 /* 881 * It appears that in NetBSD, lookup is supposed to return the vnode locked 882 */ 883 int 884 coda_lookup(void *v) 885 { 886 /* true args */ 887 struct vop_lookup_args *ap = v; 888 struct vnode *dvp = ap->a_dvp; 889 struct cnode *dcp = VTOC(dvp); 890 struct vnode **vpp = ap->a_vpp; 891 /* 892 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest 893 * of the string to xlate, and that we must try to get at least 894 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I 895 * could be wrong. 896 */ 897 struct componentname *cnp = ap->a_cnp; 898 kauth_cred_t cred = cnp->cn_cred; 899 struct lwp *l = cnp->cn_lwp; 900 /* locals */ 901 struct cnode *cp; 902 const char *nm = cnp->cn_nameptr; 903 int len = cnp->cn_namelen; 904 CodaFid VFid; 905 int vtype; 906 int error = 0; 907 908 cnp->cn_flags &= ~PDIRUNLOCK; 909 910 MARK_ENTRY(CODA_LOOKUP_STATS); 911 912 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %s\n", 913 nm, coda_f2s(&dcp->c_fid)));); 914 915 /* Check for lookup of control object. */ 916 if (IS_CTL_NAME(dvp, nm, len)) { 917 *vpp = coda_ctlvp; 918 vref(*vpp); 919 MARK_INT_SAT(CODA_LOOKUP_STATS); 920 goto exit; 921 } 922 923 if (len+1 > CODA_MAXNAMLEN) { 924 MARK_INT_FAIL(CODA_LOOKUP_STATS); 925 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %s (%s)\n", 926 coda_f2s(&dcp->c_fid), nm));); 927 *vpp = (struct vnode *)0; 928 error = EINVAL; 929 goto exit; 930 } 931 /* First try to look the file up in the cfs name cache */ 932 /* lock the parent vnode? */ 933 cp = coda_nc_lookup(dcp, nm, len, cred); 934 if (cp) { 935 *vpp = CTOV(cp); 936 vref(*vpp); 937 CODADEBUG(CODA_LOOKUP, 938 myprintf(("lookup result %d vpp %p\n",error,*vpp));) 939 } else { 940 941 /* The name wasn't cached, so we need to contact Venus */ 942 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, l, &VFid, &vtype); 943 944 if (error) { 945 MARK_INT_FAIL(CODA_LOOKUP_STATS); 946 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %s (%s)%d\n", 947 coda_f2s(&dcp->c_fid), nm, error));) 948 *vpp = (struct vnode *)0; 949 } else { 950 MARK_INT_SAT(CODA_LOOKUP_STATS); 951 CODADEBUG(CODA_LOOKUP, 952 myprintf(("lookup: %s type %o result %d\n", 953 coda_f2s(&VFid), vtype, error)); ) 954 955 cp = make_coda_node(&VFid, dvp->v_mount, vtype); 956 *vpp = CTOV(cp); 957 958 /* enter the new vnode in the Name Cache only if the top bit isn't set */ 959 /* And don't enter a new vnode for an invalid one! */ 960 if (!(vtype & CODA_NOCACHE)) 961 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 962 } 963 } 964 965 exit: 966 /* 967 * If we are creating, and this was the last name to be looked up, 968 * and the error was ENOENT, then there really shouldn't be an 969 * error and we can make the leaf NULL and return success. Since 970 * this is supposed to work under Mach as well as NetBSD, we're 971 * leaving this fn wrapped. We also must tell lookup/namei that 972 * we need to save the last component of the name. (Create will 973 * have to free the name buffer later...lucky us...) 974 */ 975 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) 976 && (cnp->cn_flags & ISLASTCN) 977 && (error == ENOENT)) 978 { 979 error = EJUSTRETURN; 980 cnp->cn_flags |= SAVENAME; 981 *ap->a_vpp = NULL; 982 } 983 984 /* 985 * If we are removing, and we are at the last element, and we 986 * found it, then we need to keep the name around so that the 987 * removal will go ahead as planned. Unfortunately, this will 988 * probably also lock the to-be-removed vnode, which may or may 989 * not be a good idea. I'll have to look at the bits of 990 * coda_remove to make sure. We'll only save the name if we did in 991 * fact find the name, otherwise coda_remove won't have a chance 992 * to free the pathname. 993 */ 994 if ((cnp->cn_nameiop == DELETE) 995 && (cnp->cn_flags & ISLASTCN) 996 && !error) 997 { 998 cnp->cn_flags |= SAVENAME; 999 } 1000 1001 /* 1002 * If the lookup went well, we need to (potentially?) unlock the 1003 * parent, and lock the child. We are only responsible for 1004 * checking to see if the parent is supposed to be unlocked before 1005 * we return. We must always lock the child (provided there is 1006 * one, and (the parent isn't locked or it isn't the same as the 1007 * parent.) Simple, huh? We can never leave the parent locked unless 1008 * we are ISLASTCN 1009 */ 1010 if (!error || (error == EJUSTRETURN)) { 1011 /* XXX ISDOTDOT changes locking rules - not handled. */ 1012 if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) { 1013 /* 1014 * XXX Lock child before unlocking parent? 1015 * XXX Why is it ok to fail to unlock, but a panic to fail to lock? 1016 */ 1017 if ((error = VOP_UNLOCK(dvp, 0))) { 1018 return error; 1019 } 1020 cnp->cn_flags |= PDIRUNLOCK; 1021 /* 1022 * The parent is unlocked. As long as there is a child, 1023 * lock it without bothering to check anything else. 1024 */ 1025 if (*ap->a_vpp) { 1026 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE|LK_RETRY))) { 1027 panic("unlocked parent but couldn't lock child"); 1028 } 1029 } 1030 } else { 1031 /* The parent is locked, and may be the same as the child */ 1032 if (*ap->a_vpp && (*ap->a_vpp != dvp)) { 1033 /* Different, go ahead and lock it. */ 1034 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE|LK_RETRY))) { 1035 panic("kept parent locked but couldn't lock child"); 1036 } 1037 } 1038 } 1039 } else { 1040 /* If the lookup failed, we need to ensure that the leaf is NULL */ 1041 /* Don't change any locking? */ 1042 *ap->a_vpp = NULL; 1043 } 1044 return(error); 1045 } 1046 1047 /*ARGSUSED*/ 1048 int 1049 coda_create(void *v) 1050 { 1051 /* true args */ 1052 struct vop_create_args *ap = v; 1053 struct vnode *dvp = ap->a_dvp; 1054 struct cnode *dcp = VTOC(dvp); 1055 struct vattr *va = ap->a_vap; 1056 int exclusive = 1; 1057 int mode = ap->a_vap->va_mode; 1058 struct vnode **vpp = ap->a_vpp; 1059 struct componentname *cnp = ap->a_cnp; 1060 kauth_cred_t cred = cnp->cn_cred; 1061 struct lwp *l = cnp->cn_lwp; 1062 /* locals */ 1063 int error; 1064 struct cnode *cp; 1065 const char *nm = cnp->cn_nameptr; 1066 int len = cnp->cn_namelen; 1067 CodaFid VFid; 1068 struct vattr attr; 1069 1070 MARK_ENTRY(CODA_CREATE_STATS); 1071 1072 /* All creates are exclusive XXX */ 1073 /* I'm assuming the 'mode' argument is the file mode bits XXX */ 1074 1075 /* Check for create of control object. */ 1076 if (IS_CTL_NAME(dvp, nm, len)) { 1077 *vpp = (struct vnode *)0; 1078 MARK_INT_FAIL(CODA_CREATE_STATS); 1079 return(EACCES); 1080 } 1081 1082 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, l, &VFid, &attr); 1083 1084 if (!error) { 1085 1086 /* If this is an exclusive create, panic if the file already exists. */ 1087 /* Venus should have detected the file and reported EEXIST. */ 1088 1089 if ((exclusive == 1) && 1090 (coda_find(&VFid) != NULL)) 1091 panic("cnode existed for newly created file!"); 1092 1093 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); 1094 *vpp = CTOV(cp); 1095 1096 /* Update va to reflect the new attributes. */ 1097 (*va) = attr; 1098 1099 /* Update the attribute cache and mark it as valid */ 1100 if (coda_attr_cache) { 1101 VTOC(*vpp)->c_vattr = attr; 1102 VTOC(*vpp)->c_flags |= C_VATTR; 1103 } 1104 1105 /* Invalidate the parent's attr cache, the modification time has changed */ 1106 VTOC(dvp)->c_flags &= ~C_VATTR; 1107 1108 /* enter the new vnode in the Name Cache */ 1109 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1110 1111 CODADEBUG(CODA_CREATE, 1112 myprintf(("create: %s, result %d\n", 1113 coda_f2s(&VFid), error)); ) 1114 } else { 1115 *vpp = (struct vnode *)0; 1116 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));) 1117 } 1118 1119 /* Locking strategy. */ 1120 /* 1121 * In NetBSD, all creates must explicitly vput their dvp's. We'll 1122 * go ahead and use the LOCKLEAF flag of the cnp argument. 1123 * However, I'm pretty sure that create must return the leaf 1124 * locked; so there is a DIAGNOSTIC check to ensure that this is 1125 * true. 1126 */ 1127 vput(dvp); 1128 if (!error) { 1129 if (cnp->cn_flags & LOCKLEAF) { 1130 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1131 printf("coda_create: "); 1132 panic("unlocked parent but couldn't lock child"); 1133 } 1134 } 1135 #ifdef OLD_DIAGNOSTIC 1136 else { 1137 printf("coda_create: LOCKLEAF not set!\n"); 1138 } 1139 #endif 1140 } 1141 /* Have to free the previously saved name */ 1142 /* 1143 * This condition is stolen from ufs_makeinode. I have no idea 1144 * why it's here, but what the hey... 1145 */ 1146 if ((cnp->cn_flags & SAVESTART) == 0) { 1147 PNBUF_PUT(cnp->cn_pnbuf); 1148 } 1149 return(error); 1150 } 1151 1152 int 1153 coda_remove(void *v) 1154 { 1155 /* true args */ 1156 struct vop_remove_args *ap = v; 1157 struct vnode *dvp = ap->a_dvp; 1158 struct cnode *cp = VTOC(dvp); 1159 struct componentname *cnp = ap->a_cnp; 1160 kauth_cred_t cred = cnp->cn_cred; 1161 struct lwp *l = cnp->cn_lwp; 1162 /* locals */ 1163 int error; 1164 const char *nm = cnp->cn_nameptr; 1165 int len = cnp->cn_namelen; 1166 struct cnode *tp; 1167 1168 MARK_ENTRY(CODA_REMOVE_STATS); 1169 1170 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %s\n", 1171 nm, coda_f2s(&cp->c_fid)));); 1172 1173 /* Remove the file's entry from the CODA Name Cache */ 1174 /* We're being conservative here, it might be that this person 1175 * doesn't really have sufficient access to delete the file 1176 * but we feel zapping the entry won't really hurt anyone -- dcs 1177 */ 1178 /* I'm gonna go out on a limb here. If a file and a hardlink to it 1179 * exist, and one is removed, the link count on the other will be 1180 * off by 1. We could either invalidate the attrs if cached, or 1181 * fix them. I'll try to fix them. DCS 11/8/94 1182 */ 1183 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); 1184 if (tp) { 1185 if (VALID_VATTR(tp)) { /* If attrs are cached */ 1186 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ 1187 tp->c_vattr.va_nlink--; 1188 } 1189 } 1190 1191 coda_nc_zapfile(VTOC(dvp), nm, len); 1192 /* No need to flush it if it doesn't exist! */ 1193 } 1194 /* Invalidate the parent's attr cache, the modification time has changed */ 1195 VTOC(dvp)->c_flags &= ~C_VATTR; 1196 1197 /* Check for remove of control object. */ 1198 if (IS_CTL_NAME(dvp, nm, len)) { 1199 MARK_INT_FAIL(CODA_REMOVE_STATS); 1200 return(ENOENT); 1201 } 1202 1203 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, l); 1204 1205 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) 1206 1207 /* 1208 * Regardless of what happens, we have to unconditionally drop 1209 * locks/refs on parent and child. (I hope). This is based on 1210 * what ufs_remove seems to be doing. 1211 */ 1212 if (dvp == ap->a_vp) { 1213 vrele(ap->a_vp); 1214 } else { 1215 vput(ap->a_vp); 1216 } 1217 vput(dvp); 1218 1219 if ((cnp->cn_flags & SAVESTART) == 0) { 1220 PNBUF_PUT(cnp->cn_pnbuf); 1221 } 1222 return(error); 1223 } 1224 1225 int 1226 coda_link(void *v) 1227 { 1228 /* true args */ 1229 struct vop_link_args *ap = v; 1230 struct vnode *vp = ap->a_vp; 1231 struct cnode *cp = VTOC(vp); 1232 struct vnode *tdvp = ap->a_dvp; 1233 struct cnode *tdcp = VTOC(tdvp); 1234 struct componentname *cnp = ap->a_cnp; 1235 kauth_cred_t cred = cnp->cn_cred; 1236 struct lwp *l = cnp->cn_lwp; 1237 /* locals */ 1238 int error; 1239 const char *nm = cnp->cn_nameptr; 1240 int len = cnp->cn_namelen; 1241 1242 MARK_ENTRY(CODA_LINK_STATS); 1243 1244 if (codadebug & CODADBGMSK(CODA_LINK)) { 1245 1246 myprintf(("nb_link: vp fid: %s\n", 1247 coda_f2s(&cp->c_fid))); 1248 myprintf(("nb_link: tdvp fid: %s)\n", 1249 coda_f2s(&tdcp->c_fid))); 1250 1251 } 1252 if (codadebug & CODADBGMSK(CODA_LINK)) { 1253 myprintf(("link: vp fid: %s\n", 1254 coda_f2s(&cp->c_fid))); 1255 myprintf(("link: tdvp fid: %s\n", 1256 coda_f2s(&tdcp->c_fid))); 1257 1258 } 1259 1260 /* Check for link to/from control object. */ 1261 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) { 1262 MARK_INT_FAIL(CODA_LINK_STATS); 1263 return(EACCES); 1264 } 1265 1266 /* 1267 * According to the ufs_link operation here's the locking situation: 1268 * We enter with the thing called "dvp" (the directory) locked. 1269 * We must unconditionally drop locks on "dvp" 1270 * 1271 * We enter with the thing called "vp" (the linked-to) unlocked, 1272 * but ref'd (?) 1273 * We seem to need to lock it before calling coda_link, and 1274 * unconditionally unlock it after. 1275 */ 1276 1277 if ((ap->a_vp != tdvp) && (error = vn_lock(ap->a_vp, LK_EXCLUSIVE))) { 1278 goto exit; 1279 } 1280 1281 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, l); 1282 1283 /* Invalidate the parent's attr cache, the modification time has changed */ 1284 VTOC(tdvp)->c_flags &= ~C_VATTR; 1285 VTOC(vp)->c_flags &= ~C_VATTR; 1286 1287 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) 1288 1289 exit: 1290 1291 if (ap->a_vp != tdvp) { 1292 VOP_UNLOCK(ap->a_vp, 0); 1293 } 1294 vput(tdvp); 1295 1296 /* Drop the name buffer if we don't need to SAVESTART */ 1297 if ((cnp->cn_flags & SAVESTART) == 0) { 1298 PNBUF_PUT(cnp->cn_pnbuf); 1299 } 1300 return(error); 1301 } 1302 1303 int 1304 coda_rename(void *v) 1305 { 1306 /* true args */ 1307 struct vop_rename_args *ap = v; 1308 struct vnode *odvp = ap->a_fdvp; 1309 struct cnode *odcp = VTOC(odvp); 1310 struct componentname *fcnp = ap->a_fcnp; 1311 struct vnode *ndvp = ap->a_tdvp; 1312 struct cnode *ndcp = VTOC(ndvp); 1313 struct componentname *tcnp = ap->a_tcnp; 1314 kauth_cred_t cred = fcnp->cn_cred; 1315 struct lwp *l = fcnp->cn_lwp; 1316 /* true args */ 1317 int error; 1318 const char *fnm = fcnp->cn_nameptr; 1319 int flen = fcnp->cn_namelen; 1320 const char *tnm = tcnp->cn_nameptr; 1321 int tlen = tcnp->cn_namelen; 1322 1323 MARK_ENTRY(CODA_RENAME_STATS); 1324 1325 /* Hmmm. The vnodes are already looked up. Perhaps they are locked? 1326 This could be Bad. XXX */ 1327 #ifdef OLD_DIAGNOSTIC 1328 if ((fcnp->cn_cred != tcnp->cn_cred) 1329 || (fcnp->cn_lwp != tcnp->cn_lwp)) 1330 { 1331 panic("coda_rename: component names don't agree"); 1332 } 1333 #endif 1334 1335 /* Check for rename involving control object. */ 1336 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { 1337 MARK_INT_FAIL(CODA_RENAME_STATS); 1338 return(EACCES); 1339 } 1340 1341 /* Problem with moving directories -- need to flush entry for .. */ 1342 if (odvp != ndvp) { 1343 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); 1344 if (ovcp) { 1345 struct vnode *ovp = CTOV(ovcp); 1346 if ((ovp) && 1347 (ovp->v_type == VDIR)) /* If it's a directory */ 1348 coda_nc_zapfile(VTOC(ovp),"..", 2); 1349 } 1350 } 1351 1352 /* Remove the entries for both source and target files */ 1353 coda_nc_zapfile(VTOC(odvp), fnm, flen); 1354 coda_nc_zapfile(VTOC(ndvp), tnm, tlen); 1355 1356 /* Invalidate the parent's attr cache, the modification time has changed */ 1357 VTOC(odvp)->c_flags &= ~C_VATTR; 1358 VTOC(ndvp)->c_flags &= ~C_VATTR; 1359 1360 if (flen+1 > CODA_MAXNAMLEN) { 1361 MARK_INT_FAIL(CODA_RENAME_STATS); 1362 error = EINVAL; 1363 goto exit; 1364 } 1365 1366 if (tlen+1 > CODA_MAXNAMLEN) { 1367 MARK_INT_FAIL(CODA_RENAME_STATS); 1368 error = EINVAL; 1369 goto exit; 1370 } 1371 1372 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, l); 1373 1374 exit: 1375 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) 1376 /* XXX - do we need to call cache pureg on the moved vnode? */ 1377 cache_purge(ap->a_fvp); 1378 1379 /* It seems to be incumbent on us to drop locks on all four vnodes */ 1380 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ 1381 1382 vrele(ap->a_fvp); 1383 vrele(odvp); 1384 1385 if (ap->a_tvp) { 1386 if (ap->a_tvp == ndvp) { 1387 vrele(ap->a_tvp); 1388 } else { 1389 vput(ap->a_tvp); 1390 } 1391 } 1392 1393 vput(ndvp); 1394 return(error); 1395 } 1396 1397 int 1398 coda_mkdir(void *v) 1399 { 1400 /* true args */ 1401 struct vop_mkdir_args *ap = v; 1402 struct vnode *dvp = ap->a_dvp; 1403 struct cnode *dcp = VTOC(dvp); 1404 struct componentname *cnp = ap->a_cnp; 1405 struct vattr *va = ap->a_vap; 1406 struct vnode **vpp = ap->a_vpp; 1407 kauth_cred_t cred = cnp->cn_cred; 1408 struct lwp *l = cnp->cn_lwp; 1409 /* locals */ 1410 int error; 1411 const char *nm = cnp->cn_nameptr; 1412 int len = cnp->cn_namelen; 1413 struct cnode *cp; 1414 CodaFid VFid; 1415 struct vattr ova; 1416 1417 MARK_ENTRY(CODA_MKDIR_STATS); 1418 1419 /* Check for mkdir of target object. */ 1420 if (IS_CTL_NAME(dvp, nm, len)) { 1421 *vpp = (struct vnode *)0; 1422 MARK_INT_FAIL(CODA_MKDIR_STATS); 1423 return(EACCES); 1424 } 1425 1426 if (len+1 > CODA_MAXNAMLEN) { 1427 *vpp = (struct vnode *)0; 1428 MARK_INT_FAIL(CODA_MKDIR_STATS); 1429 return(EACCES); 1430 } 1431 1432 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, l, &VFid, &ova); 1433 1434 if (!error) { 1435 if (coda_find(&VFid) != NULL) 1436 panic("cnode existed for newly created directory!"); 1437 1438 1439 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); 1440 *vpp = CTOV(cp); 1441 1442 /* enter the new vnode in the Name Cache */ 1443 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1444 1445 /* as a side effect, enter "." and ".." for the directory */ 1446 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); 1447 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); 1448 1449 if (coda_attr_cache) { 1450 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ 1451 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ 1452 } 1453 1454 /* Invalidate the parent's attr cache, the modification time has changed */ 1455 VTOC(dvp)->c_flags &= ~C_VATTR; 1456 1457 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: %s result %d\n", 1458 coda_f2s(&VFid), error)); ) 1459 } else { 1460 *vpp = (struct vnode *)0; 1461 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));) 1462 } 1463 1464 /* 1465 * Currently, all mkdirs explicitly vput their dvp's. 1466 * It also appears that we *must* lock the vpp, since 1467 * lockleaf isn't set, but someone down the road is going 1468 * to try to unlock the new directory. 1469 */ 1470 vput(dvp); 1471 if (!error) { 1472 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) { 1473 panic("coda_mkdir: couldn't lock child"); 1474 } 1475 } 1476 1477 /* Have to free the previously saved name */ 1478 /* 1479 * ufs_mkdir doesn't check for SAVESTART before freeing the 1480 * pathname buffer, but ufs_create does. For the moment, I'll 1481 * follow their lead, but this seems like it is probably 1482 * incorrect. 1483 */ 1484 PNBUF_PUT(cnp->cn_pnbuf); 1485 return(error); 1486 } 1487 1488 int 1489 coda_rmdir(void *v) 1490 { 1491 /* true args */ 1492 struct vop_rmdir_args *ap = v; 1493 struct vnode *dvp = ap->a_dvp; 1494 struct cnode *dcp = VTOC(dvp); 1495 struct componentname *cnp = ap->a_cnp; 1496 kauth_cred_t cred = cnp->cn_cred; 1497 struct lwp *l = cnp->cn_lwp; 1498 /* true args */ 1499 int error; 1500 const char *nm = cnp->cn_nameptr; 1501 int len = cnp->cn_namelen; 1502 struct cnode *cp; 1503 1504 MARK_ENTRY(CODA_RMDIR_STATS); 1505 1506 /* Check for rmdir of control object. */ 1507 if (IS_CTL_NAME(dvp, nm, len)) { 1508 MARK_INT_FAIL(CODA_RMDIR_STATS); 1509 return(ENOENT); 1510 } 1511 1512 /* We're being conservative here, it might be that this person 1513 * doesn't really have sufficient access to delete the file 1514 * but we feel zapping the entry won't really hurt anyone -- dcs 1515 */ 1516 /* 1517 * As a side effect of the rmdir, remove any entries for children of 1518 * the directory, especially "." and "..". 1519 */ 1520 cp = coda_nc_lookup(dcp, nm, len, cred); 1521 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); 1522 1523 /* Remove the file's entry from the CODA Name Cache */ 1524 coda_nc_zapfile(dcp, nm, len); 1525 1526 /* Invalidate the parent's attr cache, the modification time has changed */ 1527 dcp->c_flags &= ~C_VATTR; 1528 1529 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, l); 1530 1531 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) 1532 1533 /* 1534 * regardless of what happens, we need to drop locks/refs on the 1535 * parent and child. I think. 1536 */ 1537 if (dvp == ap->a_vp) { 1538 vrele(ap->a_vp); 1539 } else { 1540 vput(ap->a_vp); 1541 } 1542 vput(dvp); 1543 1544 if ((cnp->cn_flags & SAVESTART) == 0) { 1545 PNBUF_PUT(cnp->cn_pnbuf); 1546 } 1547 return(error); 1548 } 1549 1550 int 1551 coda_symlink(void *v) 1552 { 1553 /* true args */ 1554 struct vop_symlink_args *ap = v; 1555 struct vnode *tdvp = ap->a_dvp; 1556 struct cnode *tdcp = VTOC(tdvp); 1557 struct componentname *cnp = ap->a_cnp; 1558 struct vattr *tva = ap->a_vap; 1559 char *path = ap->a_target; 1560 kauth_cred_t cred = cnp->cn_cred; 1561 struct lwp *l = cnp->cn_lwp; 1562 /* locals */ 1563 int error; 1564 u_long saved_cn_flags; 1565 /* 1566 * XXX I'm assuming the following things about coda_symlink's 1567 * arguments: 1568 * t(foo) is the new name/parent/etc being created. 1569 * lname is the contents of the new symlink. 1570 */ 1571 const char *nm = cnp->cn_nameptr; 1572 int len = cnp->cn_namelen; 1573 int plen = strlen(path); 1574 1575 /* XXX What about the vpp argument? Do we need it? */ 1576 /* 1577 * Here's the strategy for the moment: perform the symlink, then 1578 * do a lookup to grab the resulting vnode. I know this requires 1579 * two communications with Venus for a new sybolic link, but 1580 * that's the way the ball bounces. I don't yet want to change 1581 * the way the Mach symlink works. When Mach support is 1582 * deprecated, we should change symlink so that the common case 1583 * returns the resultant vnode in a vpp argument. 1584 */ 1585 1586 MARK_ENTRY(CODA_SYMLINK_STATS); 1587 1588 /* Check for symlink of control object. */ 1589 if (IS_CTL_NAME(tdvp, nm, len)) { 1590 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1591 return(EACCES); 1592 } 1593 1594 if (plen+1 > CODA_MAXPATHLEN) { 1595 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1596 return(EINVAL); 1597 } 1598 1599 if (len+1 > CODA_MAXNAMLEN) { 1600 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1601 error = EINVAL; 1602 goto exit; 1603 } 1604 1605 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, l); 1606 1607 /* Invalidate the parent's attr cache, the modification time has changed */ 1608 tdcp->c_flags &= ~C_VATTR; 1609 1610 if (!error) { 1611 /* 1612 * VOP_SYMLINK is not defined to pay attention to cnp->cn_flags; 1613 * these are defined only for VOP_LOOKUP. We desire to reuse 1614 * cnp for a VOP_LOOKUP operation, and must be sure to not pass 1615 * stray flags passed to us. Such stray flags can occur because 1616 * sys_symlink makes a namei call and then reuses the 1617 * componentname structure. 1618 */ 1619 /* 1620 * XXX Arguably we should create our own componentname structure 1621 * and not reuse the one that was passed in. 1622 */ 1623 saved_cn_flags = cnp->cn_flags; 1624 cnp->cn_flags &= ~(MODMASK | OPMASK); 1625 cnp->cn_flags |= LOOKUP; 1626 error = VOP_LOOKUP(tdvp, ap->a_vpp, cnp); 1627 cnp->cn_flags = saved_cn_flags; 1628 /* Either an error occurs, or ap->a_vpp is locked. */ 1629 } else { 1630 /* error, so unlock and deference parent */ 1631 vput(tdvp); 1632 } 1633 1634 exit: 1635 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) 1636 return(error); 1637 } 1638 1639 /* 1640 * Read directory entries. 1641 */ 1642 int 1643 coda_readdir(void *v) 1644 { 1645 /* true args */ 1646 struct vop_readdir_args *ap = v; 1647 struct vnode *vp = ap->a_vp; 1648 struct cnode *cp = VTOC(vp); 1649 struct uio *uiop = ap->a_uio; 1650 kauth_cred_t cred = ap->a_cred; 1651 int *eofflag = ap->a_eofflag; 1652 off_t **cookies = ap->a_cookies; 1653 int *ncookies = ap->a_ncookies; 1654 /* upcall decl */ 1655 /* locals */ 1656 struct lwp *l = curlwp; 1657 int error = 0; 1658 1659 MARK_ENTRY(CODA_READDIR_STATS); 1660 1661 CODADEBUG(CODA_READDIR, myprintf(("coda_readdir(%p, %lu, %lld)\n", uiop->uio_iov->iov_base, (unsigned long) uiop->uio_resid, (long long) uiop->uio_offset)); ) 1662 1663 /* Check for readdir of control object. */ 1664 if (IS_CTL_VP(vp)) { 1665 MARK_INT_FAIL(CODA_READDIR_STATS); 1666 return(ENOENT); 1667 } 1668 1669 { 1670 /* Redirect the request to UFS. */ 1671 1672 /* If directory is not already open do an "internal open" on it. */ 1673 int opened_internally = 0; 1674 if (cp->c_ovp == NULL) { 1675 opened_internally = 1; 1676 MARK_INT_GEN(CODA_OPEN_STATS); 1677 error = VOP_OPEN(vp, FREAD, cred, l); 1678 #ifdef CODA_VERBOSE 1679 printf("coda_readdir: Internally Opening %p\n", vp); 1680 #endif 1681 if (error) return(error); 1682 } else 1683 vp = cp->c_ovp; 1684 1685 /* Have UFS handle the call. */ 1686 CODADEBUG(CODA_READDIR, myprintf(( 1687 "indirect readdir: fid = %s, refcnt = %d\n", 1688 coda_f2s(&cp->c_fid), vp->v_usecount)); ) 1689 error = VOP_READDIR(vp, uiop, cred, eofflag, cookies, ncookies); 1690 if (error) 1691 MARK_INT_FAIL(CODA_READDIR_STATS); 1692 else 1693 MARK_INT_SAT(CODA_READDIR_STATS); 1694 1695 /* Do an "internal close" if necessary. */ 1696 if (opened_internally) { 1697 MARK_INT_GEN(CODA_CLOSE_STATS); 1698 (void)VOP_CLOSE(vp, FREAD, cred, l); 1699 } 1700 } 1701 1702 return(error); 1703 } 1704 1705 /* 1706 * Convert from file system blocks to device blocks 1707 */ 1708 int 1709 coda_bmap(void *v) 1710 { 1711 /* XXX on the global proc */ 1712 /* true args */ 1713 struct vop_bmap_args *ap = v; 1714 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */ 1715 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */ 1716 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */ 1717 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */ 1718 struct lwp *l __attribute__((unused)) = curlwp; 1719 /* upcall decl */ 1720 /* locals */ 1721 1722 *vpp = (struct vnode *)0; 1723 myprintf(("coda_bmap called!\n")); 1724 return(EINVAL); 1725 } 1726 1727 /* 1728 * I don't think the following two things are used anywhere, so I've 1729 * commented them out 1730 * 1731 * struct buf *async_bufhead; 1732 * int async_daemon_count; 1733 */ 1734 int 1735 coda_strategy(void *v) 1736 { 1737 /* true args */ 1738 struct vop_strategy_args *ap = v; 1739 struct buf *bp __attribute__((unused)) = ap->a_bp; 1740 struct lwp *l __attribute__((unused)) = curlwp; 1741 /* upcall decl */ 1742 /* locals */ 1743 1744 myprintf(("coda_strategy called! ")); 1745 return(EINVAL); 1746 } 1747 1748 int 1749 coda_reclaim(void *v) 1750 { 1751 /* true args */ 1752 struct vop_reclaim_args *ap = v; 1753 struct vnode *vp = ap->a_vp; 1754 struct cnode *cp = VTOC(vp); 1755 /* upcall decl */ 1756 /* locals */ 1757 1758 /* 1759 * Forced unmount/flush will let vnodes with non zero use be destroyed! 1760 */ 1761 ENTRY; 1762 1763 if (IS_UNMOUNTING(cp)) { 1764 #ifdef DEBUG 1765 if (VTOC(vp)->c_ovp) { 1766 if (IS_UNMOUNTING(cp)) 1767 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp); 1768 } 1769 #endif 1770 } else { 1771 #ifdef OLD_DIAGNOSTIC 1772 if (vp->v_usecount != 0) 1773 print("coda_reclaim: pushing active %p\n", vp); 1774 if (VTOC(vp)->c_ovp) { 1775 panic("coda_reclaim: c_ovp not void"); 1776 } 1777 #endif 1778 } 1779 cache_purge(vp); 1780 coda_free(VTOC(vp)); 1781 SET_VTOC(vp) = NULL; 1782 return (0); 1783 } 1784 1785 int 1786 coda_lock(void *v) 1787 { 1788 /* true args */ 1789 struct vop_lock_args *ap = v; 1790 struct vnode *vp = ap->a_vp; 1791 struct cnode *cp = VTOC(vp); 1792 /* upcall decl */ 1793 /* locals */ 1794 1795 ENTRY; 1796 1797 if (coda_lockdebug) { 1798 myprintf(("Attempting lock on %s\n", 1799 coda_f2s(&cp->c_fid))); 1800 } 1801 1802 return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock)); 1803 } 1804 1805 int 1806 coda_unlock(void *v) 1807 { 1808 /* true args */ 1809 struct vop_unlock_args *ap = v; 1810 struct vnode *vp = ap->a_vp; 1811 struct cnode *cp = VTOC(vp); 1812 /* upcall decl */ 1813 /* locals */ 1814 1815 ENTRY; 1816 if (coda_lockdebug) { 1817 myprintf(("Attempting unlock on %s\n", 1818 coda_f2s(&cp->c_fid))); 1819 } 1820 1821 return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock)); 1822 } 1823 1824 int 1825 coda_islocked(void *v) 1826 { 1827 /* true args */ 1828 struct vop_islocked_args *ap = v; 1829 ENTRY; 1830 1831 return (lockstatus(&ap->a_vp->v_lock)); 1832 } 1833 1834 /* How one looks up a vnode given a device/inode pair: */ 1835 int 1836 coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp) 1837 { 1838 /* This is like VFS_VGET() or igetinode()! */ 1839 int error; 1840 struct mount *mp; 1841 1842 if (!(mp = devtomp(dev))) { 1843 myprintf(("coda_grab_vnode: devtomp(%d) returns NULL\n", dev)); 1844 return(ENXIO); 1845 } 1846 1847 /* XXX - ensure that nonzero-return means failure */ 1848 error = VFS_VGET(mp, ino, vpp); 1849 if (error) { 1850 myprintf(("coda_grab_vnode: iget/vget(%d, %llu) returns %p, err %d\n", 1851 dev, (unsigned long long)ino, *vpp, error)); 1852 return(ENOENT); 1853 } 1854 return(0); 1855 } 1856 1857 void 1858 print_vattr(struct vattr *attr) 1859 { 1860 const char *typestr; 1861 1862 switch (attr->va_type) { 1863 case VNON: 1864 typestr = "VNON"; 1865 break; 1866 case VREG: 1867 typestr = "VREG"; 1868 break; 1869 case VDIR: 1870 typestr = "VDIR"; 1871 break; 1872 case VBLK: 1873 typestr = "VBLK"; 1874 break; 1875 case VCHR: 1876 typestr = "VCHR"; 1877 break; 1878 case VLNK: 1879 typestr = "VLNK"; 1880 break; 1881 case VSOCK: 1882 typestr = "VSCK"; 1883 break; 1884 case VFIFO: 1885 typestr = "VFFO"; 1886 break; 1887 case VBAD: 1888 typestr = "VBAD"; 1889 break; 1890 default: 1891 typestr = "????"; 1892 break; 1893 } 1894 1895 1896 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", 1897 typestr, (int)attr->va_mode, (int)attr->va_uid, 1898 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); 1899 1900 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", 1901 (int)attr->va_fileid, (int)attr->va_nlink, 1902 (int)attr->va_size, 1903 (int)attr->va_blocksize,(int)attr->va_bytes)); 1904 myprintf((" gen %ld flags %ld vaflags %d\n", 1905 attr->va_gen, attr->va_flags, attr->va_vaflags)); 1906 myprintf((" atime sec %d nsec %d\n", 1907 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); 1908 myprintf((" mtime sec %d nsec %d\n", 1909 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); 1910 myprintf((" ctime sec %d nsec %d\n", 1911 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); 1912 } 1913 1914 /* How to print a ucred */ 1915 void 1916 print_cred(kauth_cred_t cred) 1917 { 1918 1919 uint16_t ngroups; 1920 int i; 1921 1922 myprintf(("ref %d\tuid %d\n", kauth_cred_getrefcnt(cred), 1923 kauth_cred_geteuid(cred))); 1924 1925 ngroups = kauth_cred_ngroups(cred); 1926 for (i=0; i < ngroups; i++) 1927 myprintf(("\tgroup %d: (%d)\n", i, kauth_cred_group(cred, i))); 1928 myprintf(("\n")); 1929 1930 } 1931 1932 /* 1933 * Return a vnode for the given fid. 1934 * If no cnode exists for this fid create one and put it 1935 * in a table hashed by coda_f2i(). If the cnode for 1936 * this fid is already in the table return it (ref count is 1937 * incremented by coda_find. The cnode will be flushed from the 1938 * table when coda_inactive calls coda_unsave. 1939 */ 1940 struct cnode * 1941 make_coda_node(CodaFid *fid, struct mount *vfsp, short type) 1942 { 1943 struct cnode *cp; 1944 int err; 1945 1946 if ((cp = coda_find(fid)) == NULL) { 1947 struct vnode *vp; 1948 1949 cp = coda_alloc(); 1950 cp->c_fid = *fid; 1951 1952 err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp); 1953 if (err) { 1954 panic("coda: getnewvnode returned error %d", err); 1955 } 1956 vp->v_data = cp; 1957 vp->v_type = type; 1958 cp->c_vnode = vp; 1959 coda_save(cp); 1960 1961 } else { 1962 vref(CTOV(cp)); 1963 } 1964 1965 return cp; 1966 } 1967 1968 int 1969 coda_getpages(void *v) 1970 { 1971 struct vop_getpages_args /* { 1972 struct vnode *a_vp; 1973 voff_t a_offset; 1974 struct vm_page **a_m; 1975 int *a_count; 1976 int a_centeridx; 1977 vm_prot_t a_access_type; 1978 int a_advice; 1979 int a_flags; 1980 } */ *ap = v; 1981 struct vnode *vp = ap->a_vp; 1982 struct cnode *cp = VTOC(vp); 1983 struct lwp *l = curlwp; 1984 kauth_cred_t cred = l->l_cred; 1985 int error; 1986 1987 /* Check for control object. */ 1988 if (IS_CTL_VP(vp)) { 1989 return(EINVAL); 1990 } 1991 1992 error = VOP_OPEN(vp, FREAD, cred, l); 1993 if (error) { 1994 return error; 1995 } 1996 ap->a_vp = cp->c_ovp; 1997 error = VOCALL(ap->a_vp->v_op, VOFFSET(vop_getpages), ap); 1998 (void) VOP_CLOSE(vp, FREAD, cred, l); 1999 return error; 2000 } 2001 2002 int 2003 coda_putpages(void *v) 2004 { 2005 struct vop_putpages_args /* { 2006 struct vnode *a_vp; 2007 voff_t a_offlo; 2008 voff_t a_offhi; 2009 int a_flags; 2010 } */ *ap = v; 2011 struct vnode *vp = ap->a_vp; 2012 2013 simple_unlock(&vp->v_interlock); 2014 2015 /* Check for control object. */ 2016 if (IS_CTL_VP(vp)) { 2017 return(EINVAL); 2018 } 2019 2020 /* 2021 * XXX 2022 * we'd like to do something useful here for msync(), 2023 * but that turns out to be hard. 2024 */ 2025 2026 return 0; 2027 } 2028
Indexes created Fri Oct 17 23:09:53 GMT 2025