coda_vnops.c revision 1.98
1 /* $NetBSD: coda_vnops.c,v 1.98 2014/10/18 08:33:27 snj Exp $ */ 2 3 /* 4 * 5 * Coda: an Experimental Distributed File System 6 * Release 3.1 7 * 8 * Copyright (c) 1987-1998 Carnegie Mellon University 9 * All Rights Reserved 10 * 11 * Permission to use, copy, modify and distribute this software and its 12 * documentation is hereby granted, provided that both the copyright 13 * notice and this permission notice appear in all copies of the 14 * software, derivative works or modified versions, and any portions 15 * thereof, and that both notices appear in supporting documentation, and 16 * that credit is given to Carnegie Mellon University in all documents 17 * and publicity pertaining to direct or indirect use of this code or its 18 * derivatives. 19 * 20 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, 21 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS 22 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON 23 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER 24 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF 25 * ANY DERIVATIVE WORK. 26 * 27 * Carnegie Mellon encourages users of this software to return any 28 * improvements or extensions that they make, and to grant Carnegie 29 * Mellon the rights to redistribute these changes without encumbrance. 30 * 31 * @(#) coda/coda_vnops.c,v 1.1.1.1 1998/08/29 21:26:46 rvb Exp $ 32 */ 33 34 /* 35 * Mach Operating System 36 * Copyright (c) 1990 Carnegie-Mellon University 37 * Copyright (c) 1989 Carnegie-Mellon University 38 * All rights reserved. The CMU software License Agreement specifies 39 * the terms and conditions for use and redistribution. 40 */ 41 42 /* 43 * This code was written for the Coda file system at Carnegie Mellon 44 * University. Contributers include David Steere, James Kistler, and 45 * M. Satyanarayanan. 46 */ 47 48 #include <sys/cdefs.h> 49 __KERNEL_RCSID(0, "$NetBSD: coda_vnops.c,v 1.98 2014/10/18 08:33:27 snj Exp $"); 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/malloc.h> 54 #include <sys/errno.h> 55 #include <sys/acct.h> 56 #include <sys/file.h> 57 #include <sys/uio.h> 58 #include <sys/namei.h> 59 #include <sys/ioctl.h> 60 #include <sys/mount.h> 61 #include <sys/proc.h> 62 #include <sys/select.h> 63 #include <sys/vnode.h> 64 #include <sys/kauth.h> 65 66 #include <miscfs/genfs/genfs.h> 67 68 #include <coda/coda.h> 69 #include <coda/cnode.h> 70 #include <coda/coda_vnops.h> 71 #include <coda/coda_venus.h> 72 #include <coda/coda_opstats.h> 73 #include <coda/coda_subr.h> 74 #include <coda/coda_namecache.h> 75 #include <coda/coda_pioctl.h> 76 77 /* 78 * These flags select various performance enhancements. 79 */ 80 int coda_attr_cache = 1; /* Set to cache attributes in the kernel */ 81 int coda_symlink_cache = 1; /* Set to cache symbolic link information */ 82 int coda_access_cache = 1; /* Set to handle some access checks directly */ 83 84 /* structure to keep track of vfs calls */ 85 86 struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE]; 87 88 #define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++) 89 #define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++) 90 #define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++) 91 #define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++) 92 93 /* What we are delaying for in printf */ 94 static int coda_lockdebug = 0; 95 96 #define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__func__)) 97 98 /* Definition of the vnode operation vector */ 99 100 const struct vnodeopv_entry_desc coda_vnodeop_entries[] = { 101 { &vop_default_desc, coda_vop_error }, 102 { &vop_lookup_desc, coda_lookup }, /* lookup */ 103 { &vop_create_desc, coda_create }, /* create */ 104 { &vop_mknod_desc, coda_vop_error }, /* mknod */ 105 { &vop_open_desc, coda_open }, /* open */ 106 { &vop_close_desc, coda_close }, /* close */ 107 { &vop_access_desc, coda_access }, /* access */ 108 { &vop_getattr_desc, coda_getattr }, /* getattr */ 109 { &vop_setattr_desc, coda_setattr }, /* setattr */ 110 { &vop_read_desc, coda_read }, /* read */ 111 { &vop_write_desc, coda_write }, /* write */ 112 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 113 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 114 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 115 { &vop_ioctl_desc, coda_ioctl }, /* ioctl */ 116 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 117 { &vop_fsync_desc, coda_fsync }, /* fsync */ 118 { &vop_remove_desc, coda_remove }, /* remove */ 119 { &vop_link_desc, coda_link }, /* link */ 120 { &vop_rename_desc, coda_rename }, /* rename */ 121 { &vop_mkdir_desc, coda_mkdir }, /* mkdir */ 122 { &vop_rmdir_desc, coda_rmdir }, /* rmdir */ 123 { &vop_symlink_desc, coda_symlink }, /* symlink */ 124 { &vop_readdir_desc, coda_readdir }, /* readdir */ 125 { &vop_readlink_desc, coda_readlink }, /* readlink */ 126 { &vop_abortop_desc, coda_abortop }, /* abortop */ 127 { &vop_inactive_desc, coda_inactive }, /* inactive */ 128 { &vop_reclaim_desc, coda_reclaim }, /* reclaim */ 129 { &vop_lock_desc, coda_lock }, /* lock */ 130 { &vop_unlock_desc, coda_unlock }, /* unlock */ 131 { &vop_bmap_desc, coda_bmap }, /* bmap */ 132 { &vop_strategy_desc, coda_strategy }, /* strategy */ 133 { &vop_print_desc, coda_vop_error }, /* print */ 134 { &vop_islocked_desc, coda_islocked }, /* islocked */ 135 { &vop_pathconf_desc, coda_vop_error }, /* pathconf */ 136 { &vop_advlock_desc, coda_vop_nop }, /* advlock */ 137 { &vop_bwrite_desc, coda_vop_error }, /* bwrite */ 138 { &vop_seek_desc, genfs_seek }, /* seek */ 139 { &vop_poll_desc, genfs_poll }, /* poll */ 140 { &vop_getpages_desc, coda_getpages }, /* getpages */ 141 { &vop_putpages_desc, coda_putpages }, /* putpages */ 142 { NULL, NULL } 143 }; 144 145 static void coda_print_vattr(struct vattr *); 146 147 int (**coda_vnodeop_p)(void *); 148 const struct vnodeopv_desc coda_vnodeop_opv_desc = 149 { &coda_vnodeop_p, coda_vnodeop_entries }; 150 151 /* Definitions of NetBSD vnodeop interfaces */ 152 153 /* 154 * A generic error routine. Return EIO without looking at arguments. 155 */ 156 int 157 coda_vop_error(void *anon) { 158 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 159 160 if (codadebug) { 161 myprintf(("%s: Vnode operation %s called (error).\n", 162 __func__, (*desc)->vdesc_name)); 163 } 164 165 return EIO; 166 } 167 168 /* A generic do-nothing. */ 169 int 170 coda_vop_nop(void *anon) { 171 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 172 173 if (codadebug) { 174 myprintf(("Vnode operation %s called, but unsupported\n", 175 (*desc)->vdesc_name)); 176 } 177 return (0); 178 } 179 180 int 181 coda_vnodeopstats_init(void) 182 { 183 int i; 184 185 for(i=0;i<CODA_VNODEOPS_SIZE;i++) { 186 coda_vnodeopstats[i].opcode = i; 187 coda_vnodeopstats[i].entries = 0; 188 coda_vnodeopstats[i].sat_intrn = 0; 189 coda_vnodeopstats[i].unsat_intrn = 0; 190 coda_vnodeopstats[i].gen_intrn = 0; 191 } 192 193 return 0; 194 } 195 196 /* 197 * XXX The entire relationship between VOP_OPEN and having a container 198 * file (via venus_open) needs to be reexamined. In particular, it's 199 * valid to open/mmap/close and then reference. Instead of doing 200 * VOP_OPEN when getpages needs a container, we should do the 201 * venus_open part, and record that the vnode has opened the container 202 * for getpages, and do the matching logical close on coda_inactive. 203 * Further, coda_rdwr needs a container file, and sometimes needs to 204 * do the equivalent of open (core dumps). 205 */ 206 /* 207 * coda_open calls Venus to return the device and inode of the 208 * container file, and then obtains a vnode for that file. The 209 * container vnode is stored in the coda vnode, and a reference is 210 * added for each open file. 211 */ 212 int 213 coda_open(void *v) 214 { 215 /* 216 * NetBSD can pass the O_EXCL flag in mode, even though the check 217 * has already happened. Venus defensively assumes that if open 218 * is passed the EXCL, it must be a bug. We strip the flag here. 219 */ 220 /* true args */ 221 struct vop_open_args *ap = v; 222 vnode_t *vp = ap->a_vp; 223 struct cnode *cp = VTOC(vp); 224 int flag = ap->a_mode & (~O_EXCL); 225 kauth_cred_t cred = ap->a_cred; 226 /* locals */ 227 int error; 228 dev_t dev; /* container file device, inode, vnode */ 229 ino_t inode; 230 vnode_t *container_vp; 231 232 MARK_ENTRY(CODA_OPEN_STATS); 233 234 KASSERT(VOP_ISLOCKED(vp)); 235 /* Check for open of control file. */ 236 if (IS_CTL_VP(vp)) { 237 /* if (WRITABLE(flag)) */ 238 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) { 239 MARK_INT_FAIL(CODA_OPEN_STATS); 240 return(EACCES); 241 } 242 MARK_INT_SAT(CODA_OPEN_STATS); 243 return(0); 244 } 245 246 error = venus_open(vtomi(vp), &cp->c_fid, flag, cred, curlwp, &dev, &inode); 247 if (error) 248 return (error); 249 if (!error) { 250 CODADEBUG(CODA_OPEN, myprintf(( 251 "%s: dev 0x%llx inode %llu result %d\n", __func__, 252 (unsigned long long)dev, (unsigned long long)inode, error));) 253 } 254 255 /* 256 * Obtain locked and referenced container vnode from container 257 * device/inode. 258 */ 259 error = coda_grab_vnode(vp, dev, inode, &container_vp); 260 if (error) 261 return (error); 262 263 /* Save the vnode pointer for the container file. */ 264 if (cp->c_ovp == NULL) { 265 cp->c_ovp = container_vp; 266 } else { 267 if (cp->c_ovp != container_vp) 268 /* 269 * Perhaps venus returned a different container, or 270 * something else went wrong. 271 */ 272 panic("%s: cp->c_ovp != container_vp", __func__); 273 } 274 cp->c_ocount++; 275 276 /* Flush the attribute cache if writing the file. */ 277 if (flag & FWRITE) { 278 cp->c_owrite++; 279 cp->c_flags &= ~C_VATTR; 280 } 281 282 /* 283 * Save the <device, inode> pair for the container file to speed 284 * up subsequent reads while closed (mmap, program execution). 285 * This is perhaps safe because venus will invalidate the node 286 * before changing the container file mapping. 287 */ 288 cp->c_device = dev; 289 cp->c_inode = inode; 290 291 /* Open the container file. */ 292 error = VOP_OPEN(container_vp, flag, cred); 293 /* 294 * Drop the lock on the container, after we have done VOP_OPEN 295 * (which requires a locked vnode). 296 */ 297 VOP_UNLOCK(container_vp); 298 return(error); 299 } 300 301 /* 302 * Close the cache file used for I/O and notify Venus. 303 */ 304 int 305 coda_close(void *v) 306 { 307 /* true args */ 308 struct vop_close_args *ap = v; 309 vnode_t *vp = ap->a_vp; 310 struct cnode *cp = VTOC(vp); 311 int flag = ap->a_fflag; 312 kauth_cred_t cred = ap->a_cred; 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 /* 325 * XXX The IS_UNMOUNTING part of this is very suspect. 326 */ 327 if (IS_UNMOUNTING(cp)) { 328 if (cp->c_ovp) { 329 #ifdef CODA_VERBOSE 330 printf("%s: destroying container %d, ufs vp %p of vp %p/cp %p\n", 331 __func__, vp->v_usecount, cp->c_ovp, vp, cp); 332 #endif 333 #ifdef hmm 334 vgone(cp->c_ovp); 335 #else 336 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY); 337 VOP_CLOSE(cp->c_ovp, flag, cred); /* Do errors matter here? */ 338 vput(cp->c_ovp); 339 #endif 340 } else { 341 #ifdef CODA_VERBOSE 342 printf("%s: NO container vp %p/cp %p\n", __func__, vp, cp); 343 #endif 344 } 345 return ENODEV; 346 } 347 348 /* Lock the container node, and VOP_CLOSE it. */ 349 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY); 350 VOP_CLOSE(cp->c_ovp, flag, cred); /* Do errors matter here? */ 351 /* 352 * Drop the lock we just obtained, and vrele the container vnode. 353 * Decrement reference counts, and clear container vnode pointer on 354 * last close. 355 */ 356 vput(cp->c_ovp); 357 if (flag & FWRITE) 358 --cp->c_owrite; 359 if (--cp->c_ocount == 0) 360 cp->c_ovp = NULL; 361 362 error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, curlwp); 363 364 CODADEBUG(CODA_CLOSE, myprintf(("%s: result %d\n", __func__, error)); ) 365 return(error); 366 } 367 368 int 369 coda_read(void *v) 370 { 371 struct vop_read_args *ap = v; 372 373 ENTRY; 374 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ, 375 ap->a_ioflag, ap->a_cred, curlwp)); 376 } 377 378 int 379 coda_write(void *v) 380 { 381 struct vop_write_args *ap = v; 382 383 ENTRY; 384 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE, 385 ap->a_ioflag, ap->a_cred, curlwp)); 386 } 387 388 int 389 coda_rdwr(vnode_t *vp, struct uio *uiop, enum uio_rw rw, int ioflag, 390 kauth_cred_t cred, struct lwp *l) 391 { 392 /* upcall decl */ 393 /* NOTE: container file operation!!! */ 394 /* locals */ 395 struct cnode *cp = VTOC(vp); 396 vnode_t *cfvp = cp->c_ovp; 397 struct proc *p = l->l_proc; 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)\n", rw, 404 uiop->uio_iov->iov_base, (unsigned long) uiop->uio_resid, 405 (long long) uiop->uio_offset)); ) 406 407 /* Check for rdwr of control object. */ 408 if (IS_CTL_VP(vp)) { 409 MARK_INT_FAIL(CODA_RDWR_STATS); 410 return(EINVAL); 411 } 412 413 /* Redirect the request to UFS. */ 414 415 /* 416 * If file is not already open this must be a page 417 * {read,write} request. Iget the cache file's inode 418 * pointer if we still have its <device, inode> pair. 419 * Otherwise, we must do an internal open to derive the 420 * pair. 421 * XXX Integrate this into a coherent strategy for container 422 * file acquisition. 423 */ 424 if (cfvp == NULL) { 425 /* 426 * If we're dumping core, do the internal open. Otherwise 427 * venus won't have the correct size of the core when 428 * it's completely written. 429 */ 430 if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 431 #ifdef CODA_VERBOSE 432 printf("%s: grabbing container vnode, losing reference\n", 433 __func__); 434 #endif 435 /* Get locked and refed vnode. */ 436 error = coda_grab_vnode(vp, cp->c_device, cp->c_inode, &cfvp); 437 if (error) { 438 MARK_INT_FAIL(CODA_RDWR_STATS); 439 return(error); 440 } 441 /* 442 * Drop lock. 443 * XXX Where is reference released. 444 */ 445 VOP_UNLOCK(cfvp); 446 } 447 else { 448 #ifdef CODA_VERBOSE 449 printf("%s: internal VOP_OPEN\n", __func__); 450 #endif 451 opened_internally = 1; 452 MARK_INT_GEN(CODA_OPEN_STATS); 453 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), cred); 454 #ifdef CODA_VERBOSE 455 printf("%s: Internally Opening %p\n", __func__, vp); 456 #endif 457 if (error) { 458 MARK_INT_FAIL(CODA_RDWR_STATS); 459 return(error); 460 } 461 cfvp = cp->c_ovp; 462 } 463 } 464 465 /* Have UFS handle the call. */ 466 CODADEBUG(CODA_RDWR, myprintf(("%s: fid = %s, refcnt = %d\n", __func__, 467 coda_f2s(&cp->c_fid), CTOV(cp)->v_usecount)); ) 468 469 if (rw == UIO_READ) { 470 error = VOP_READ(cfvp, uiop, ioflag, cred); 471 } else { 472 error = VOP_WRITE(cfvp, uiop, ioflag, cred); 473 } 474 475 if (error) 476 MARK_INT_FAIL(CODA_RDWR_STATS); 477 else 478 MARK_INT_SAT(CODA_RDWR_STATS); 479 480 /* Do an internal close if necessary. */ 481 if (opened_internally) { 482 MARK_INT_GEN(CODA_CLOSE_STATS); 483 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred); 484 } 485 486 /* Invalidate cached attributes if writing. */ 487 if (rw == UIO_WRITE) 488 cp->c_flags &= ~C_VATTR; 489 return(error); 490 } 491 492 int 493 coda_ioctl(void *v) 494 { 495 /* true args */ 496 struct vop_ioctl_args *ap = v; 497 vnode_t *vp = ap->a_vp; 498 int com = ap->a_command; 499 void *data = ap->a_data; 500 int flag = ap->a_fflag; 501 kauth_cred_t cred = ap->a_cred; 502 /* locals */ 503 int error; 504 vnode_t *tvp; 505 struct PioctlData *iap = (struct PioctlData *)data; 506 namei_simple_flags_t sflags; 507 508 MARK_ENTRY(CODA_IOCTL_STATS); 509 510 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));) 511 512 /* Don't check for operation on a dying object, for ctlvp it 513 shouldn't matter */ 514 515 /* Must be control object to succeed. */ 516 if (!IS_CTL_VP(vp)) { 517 MARK_INT_FAIL(CODA_IOCTL_STATS); 518 CODADEBUG(CODA_IOCTL, myprintf(("%s error: vp != ctlvp", __func__));) 519 return (EOPNOTSUPP); 520 } 521 /* Look up the pathname. */ 522 523 /* Should we use the name cache here? It would get it from 524 lookupname sooner or later anyway, right? */ 525 526 sflags = iap->follow ? NSM_FOLLOW_NOEMULROOT : NSM_NOFOLLOW_NOEMULROOT; 527 error = namei_simple_user(iap->path, sflags, &tvp); 528 529 if (error) { 530 MARK_INT_FAIL(CODA_IOCTL_STATS); 531 CODADEBUG(CODA_IOCTL, myprintf(("%s error: lookup returns %d\n", 532 __func__, error));) 533 return(error); 534 } 535 536 /* 537 * Make sure this is a coda style cnode, but it may be a 538 * different vfsp 539 */ 540 /* XXX: this totally violates the comment about vtagtype in vnode.h */ 541 if (tvp->v_tag != VT_CODA) { 542 vrele(tvp); 543 MARK_INT_FAIL(CODA_IOCTL_STATS); 544 CODADEBUG(CODA_IOCTL, myprintf(("%s error: %s not a coda object\n", 545 __func__, iap->path));) 546 return(EINVAL); 547 } 548 549 if (iap->vi.in_size > VC_MAXDATASIZE || iap->vi.out_size > VC_MAXDATASIZE) { 550 vrele(tvp); 551 return(EINVAL); 552 } 553 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, 554 cred, curlwp); 555 556 if (error) 557 MARK_INT_FAIL(CODA_IOCTL_STATS); 558 else 559 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) 560 561 vrele(tvp); 562 return(error); 563 } 564 565 /* 566 * To reduce the cost of a user-level venus;we cache attributes in 567 * the kernel. Each cnode has storage allocated for an attribute. If 568 * c_vattr is valid, return a reference to it. Otherwise, get the 569 * attributes from venus and store them in the cnode. There is some 570 * question if this method is a security leak. But I think that in 571 * order to make this call, the user must have done a lookup and 572 * opened the file, and therefore should already have access. 573 */ 574 int 575 coda_getattr(void *v) 576 { 577 /* true args */ 578 struct vop_getattr_args *ap = v; 579 vnode_t *vp = ap->a_vp; 580 struct cnode *cp = VTOC(vp); 581 struct vattr *vap = ap->a_vap; 582 kauth_cred_t cred = ap->a_cred; 583 /* locals */ 584 int error; 585 586 MARK_ENTRY(CODA_GETATTR_STATS); 587 588 /* Check for getattr of control object. */ 589 if (IS_CTL_VP(vp)) { 590 MARK_INT_FAIL(CODA_GETATTR_STATS); 591 return(ENOENT); 592 } 593 594 /* Check to see if the attributes have already been cached */ 595 if (VALID_VATTR(cp)) { 596 CODADEBUG(CODA_GETATTR, { myprintf(("%s: attr cache hit: %s\n", 597 __func__, coda_f2s(&cp->c_fid)));}) 598 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 599 coda_print_vattr(&cp->c_vattr); ) 600 601 *vap = cp->c_vattr; 602 MARK_INT_SAT(CODA_GETATTR_STATS); 603 return(0); 604 } 605 606 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, curlwp, vap); 607 608 if (!error) { 609 CODADEBUG(CODA_GETATTR, myprintf(("%s miss %s: result %d\n", 610 __func__, coda_f2s(&cp->c_fid), error)); ) 611 612 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 613 coda_print_vattr(vap); ) 614 615 /* If not open for write, store attributes in cnode */ 616 if ((cp->c_owrite == 0) && (coda_attr_cache)) { 617 cp->c_vattr = *vap; 618 cp->c_flags |= C_VATTR; 619 } 620 621 } 622 return(error); 623 } 624 625 int 626 coda_setattr(void *v) 627 { 628 /* true args */ 629 struct vop_setattr_args *ap = v; 630 vnode_t *vp = ap->a_vp; 631 struct cnode *cp = VTOC(vp); 632 struct vattr *vap = ap->a_vap; 633 kauth_cred_t cred = ap->a_cred; 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 coda_print_vattr(vap); 647 } 648 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, curlwp); 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(void *v) 659 { 660 /* true args */ 661 struct vop_access_args *ap = v; 662 vnode_t *vp = ap->a_vp; 663 struct cnode *cp = VTOC(vp); 664 int mode = ap->a_mode; 665 kauth_cred_t cred = ap->a_cred; 666 /* locals */ 667 int error; 668 669 MARK_ENTRY(CODA_ACCESS_STATS); 670 671 /* Check for access of control object. Only read access is 672 allowed on it. */ 673 if (IS_CTL_VP(vp)) { 674 /* bogus hack - all will be marked as successes */ 675 MARK_INT_SAT(CODA_ACCESS_STATS); 676 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 677 ? 0 : EACCES); 678 } 679 680 /* 681 * if the file is a directory, and we are checking exec (eg lookup) 682 * access, and the file is in the namecache, then the user must have 683 * lookup access to it. 684 */ 685 if (coda_access_cache) { 686 if ((vp->v_type == VDIR) && (mode & VEXEC)) { 687 if (coda_nc_lookup(cp, ".", 1, cred)) { 688 MARK_INT_SAT(CODA_ACCESS_STATS); 689 return(0); /* it was in the cache */ 690 } 691 } 692 } 693 694 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, curlwp); 695 696 return(error); 697 } 698 699 /* 700 * CODA abort op, called after namei() when a CREATE/DELETE isn't actually 701 * done. If a buffer has been saved in anticipation of a coda_create or 702 * a coda_remove, delete it. 703 */ 704 /* ARGSUSED */ 705 int 706 coda_abortop(void *v) 707 { 708 /* true args */ 709 struct vop_abortop_args /* { 710 vnode_t *a_dvp; 711 struct componentname *a_cnp; 712 } */ *ap = v; 713 714 (void)ap; 715 /* upcall decl */ 716 /* locals */ 717 718 return (0); 719 } 720 721 int 722 coda_readlink(void *v) 723 { 724 /* true args */ 725 struct vop_readlink_args *ap = v; 726 vnode_t *vp = ap->a_vp; 727 struct cnode *cp = VTOC(vp); 728 struct uio *uiop = ap->a_uio; 729 kauth_cred_t cred = ap->a_cred; 730 /* locals */ 731 struct lwp *l = curlwp; 732 int error; 733 char *str; 734 int len; 735 736 MARK_ENTRY(CODA_READLINK_STATS); 737 738 /* Check for readlink of control object. */ 739 if (IS_CTL_VP(vp)) { 740 MARK_INT_FAIL(CODA_READLINK_STATS); 741 return(ENOENT); 742 } 743 744 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ 745 uiop->uio_rw = UIO_READ; 746 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); 747 if (error) 748 MARK_INT_FAIL(CODA_READLINK_STATS); 749 else 750 MARK_INT_SAT(CODA_READLINK_STATS); 751 return(error); 752 } 753 754 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, l, &str, &len); 755 756 if (!error) { 757 uiop->uio_rw = UIO_READ; 758 error = uiomove(str, len, uiop); 759 760 if (coda_symlink_cache) { 761 cp->c_symlink = str; 762 cp->c_symlen = len; 763 cp->c_flags |= C_SYMLINK; 764 } else 765 CODA_FREE(str, len); 766 } 767 768 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) 769 return(error); 770 } 771 772 int 773 coda_fsync(void *v) 774 { 775 /* true args */ 776 struct vop_fsync_args *ap = v; 777 vnode_t *vp = ap->a_vp; 778 struct cnode *cp = VTOC(vp); 779 kauth_cred_t cred = ap->a_cred; 780 /* locals */ 781 vnode_t *convp = cp->c_ovp; 782 int error; 783 784 MARK_ENTRY(CODA_FSYNC_STATS); 785 786 /* Check for fsync on an unmounting object */ 787 /* The NetBSD kernel, in its infinite wisdom, can try to fsync 788 * after an unmount has been initiated. This is a Bad Thing, 789 * which we have to avoid. Not a legitimate failure for stats. 790 */ 791 if (IS_UNMOUNTING(cp)) { 792 return(ENODEV); 793 } 794 795 /* Check for fsync of control object. */ 796 if (IS_CTL_VP(vp)) { 797 MARK_INT_SAT(CODA_FSYNC_STATS); 798 return(0); 799 } 800 801 if (convp) 802 VOP_FSYNC(convp, cred, MNT_WAIT, 0, 0); 803 804 /* 805 * We can expect fsync on any vnode at all if venus is pruging it. 806 * Venus can't very well answer the fsync request, now can it? 807 * Hopefully, it won't have to, because hopefully, venus preserves 808 * the (possibly untrue) invariant that it never purges an open 809 * vnode. Hopefully. 810 */ 811 if (cp->c_flags & C_PURGING) { 812 return(0); 813 } 814 815 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, curlwp); 816 817 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ) 818 return(error); 819 } 820 821 /* 822 * vp is locked on entry, and we must unlock it. 823 * XXX This routine is suspect and probably needs rewriting. 824 */ 825 int 826 coda_inactive(void *v) 827 { 828 /* true args */ 829 struct vop_inactive_args *ap = v; 830 vnode_t *vp = ap->a_vp; 831 struct cnode *cp = VTOC(vp); 832 kauth_cred_t cred __unused = NULL; 833 834 /* We don't need to send inactive to venus - DCS */ 835 MARK_ENTRY(CODA_INACTIVE_STATS); 836 837 if (IS_CTL_VP(vp)) { 838 MARK_INT_SAT(CODA_INACTIVE_STATS); 839 return 0; 840 } 841 842 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %s, vfsp %p\n", 843 coda_f2s(&cp->c_fid), vp->v_mount));) 844 845 /* If an array has been allocated to hold the symlink, deallocate it */ 846 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { 847 if (cp->c_symlink == NULL) 848 panic("%s: null symlink pointer in cnode", __func__); 849 850 CODA_FREE(cp->c_symlink, cp->c_symlen); 851 cp->c_flags &= ~C_SYMLINK; 852 cp->c_symlen = 0; 853 } 854 855 /* Remove it from the table so it can't be found. */ 856 coda_unsave(cp); 857 if (vp->v_mount->mnt_data == NULL) { 858 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); 859 panic("badness in coda_inactive"); 860 } 861 862 #ifdef CODA_VERBOSE 863 /* Sanity checks that perhaps should be panic. */ 864 if (vp->v_usecount > 1) 865 printf("%s: %p usecount %d\n", __func__, vp, vp->v_usecount); 866 if (cp->c_ovp != NULL) 867 printf("%s: %p ovp != NULL\n", __func__, vp); 868 #endif 869 /* XXX Do we need to VOP_CLOSE container vnodes? */ 870 VOP_UNLOCK(vp); 871 if (!IS_UNMOUNTING(cp)) 872 *ap->a_recycle = true; 873 874 MARK_INT_SAT(CODA_INACTIVE_STATS); 875 return(0); 876 } 877 878 /* 879 * Coda does not use the normal namecache, but a private version. 880 * Consider how to use the standard facility instead. 881 */ 882 int 883 coda_lookup(void *v) 884 { 885 /* true args */ 886 struct vop_lookup_v2_args *ap = v; 887 /* (locked) vnode of dir in which to do lookup */ 888 vnode_t *dvp = ap->a_dvp; 889 struct cnode *dcp = VTOC(dvp); 890 /* output variable for result */ 891 vnode_t **vpp = ap->a_vpp; 892 /* name to lookup */ 893 struct componentname *cnp = ap->a_cnp; 894 kauth_cred_t cred = cnp->cn_cred; 895 struct lwp *l = curlwp; 896 /* locals */ 897 struct cnode *cp; 898 const char *nm = cnp->cn_nameptr; 899 int len = cnp->cn_namelen; 900 CodaFid VFid; 901 int vtype; 902 int error = 0; 903 904 MARK_ENTRY(CODA_LOOKUP_STATS); 905 906 CODADEBUG(CODA_LOOKUP, myprintf(("%s: %s in %s\n", __func__, 907 nm, coda_f2s(&dcp->c_fid)));) 908 909 /* 910 * XXX componentname flags in MODMASK are not handled at all 911 */ 912 913 /* 914 * The overall strategy is to switch on the lookup type and get a 915 * result vnode that is vref'd but not locked. 916 */ 917 918 /* Check for lookup of control object. */ 919 if (IS_CTL_NAME(dvp, nm, len)) { 920 *vpp = coda_ctlvp; 921 vref(*vpp); 922 MARK_INT_SAT(CODA_LOOKUP_STATS); 923 goto exit; 924 } 925 926 /* Avoid trying to hand venus an unreasonably long name. */ 927 if (len+1 > CODA_MAXNAMLEN) { 928 MARK_INT_FAIL(CODA_LOOKUP_STATS); 929 CODADEBUG(CODA_LOOKUP, myprintf(("%s: name too long:, %s (%s)\n", 930 __func__, coda_f2s(&dcp->c_fid), nm));) 931 *vpp = (vnode_t *)0; 932 error = EINVAL; 933 goto exit; 934 } 935 936 /* 937 * Try to resolve the lookup in the minicache. If that fails, ask 938 * venus to do the lookup. XXX The interaction between vnode 939 * locking and any locking that coda does is not clear. 940 */ 941 cp = coda_nc_lookup(dcp, nm, len, cred); 942 if (cp) { 943 *vpp = CTOV(cp); 944 vref(*vpp); 945 CODADEBUG(CODA_LOOKUP, 946 myprintf(("lookup result %d vpp %p\n",error,*vpp));) 947 } else { 948 /* The name wasn't cached, so ask Venus. */ 949 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, l, &VFid, 950 &vtype); 951 952 if (error) { 953 MARK_INT_FAIL(CODA_LOOKUP_STATS); 954 CODADEBUG(CODA_LOOKUP, myprintf(("%s: lookup error on %s (%s)%d\n", 955 __func__, coda_f2s(&dcp->c_fid), nm, error));) 956 *vpp = (vnode_t *)0; 957 } else { 958 MARK_INT_SAT(CODA_LOOKUP_STATS); 959 CODADEBUG(CODA_LOOKUP, myprintf(("%s: %s type %o result %d\n", 960 __func__, coda_f2s(&VFid), vtype, error)); ) 961 962 cp = make_coda_node(&VFid, dvp->v_mount, vtype); 963 *vpp = CTOV(cp); 964 /* vpp is now vrefed. */ 965 966 /* 967 * Unless this vnode is marked CODA_NOCACHE, enter it into 968 * the coda name cache to avoid a future venus round-trip. 969 * XXX Interaction with componentname NOCACHE is unclear. 970 */ 971 if (!(vtype & CODA_NOCACHE)) 972 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 973 } 974 } 975 976 exit: 977 /* 978 * If we are creating, and this was the last name to be looked up, 979 * and the error was ENOENT, then make the leaf NULL and return 980 * success. 981 * XXX Check against new lookup rules. 982 */ 983 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) 984 && (cnp->cn_flags & ISLASTCN) 985 && (error == ENOENT)) 986 { 987 error = EJUSTRETURN; 988 *ap->a_vpp = NULL; 989 } 990 991 return(error); 992 } 993 994 /*ARGSUSED*/ 995 int 996 coda_create(void *v) 997 { 998 /* true args */ 999 struct vop_create_v3_args *ap = v; 1000 vnode_t *dvp = ap->a_dvp; 1001 struct cnode *dcp = VTOC(dvp); 1002 struct vattr *va = ap->a_vap; 1003 int exclusive = 1; 1004 int mode = ap->a_vap->va_mode; 1005 vnode_t **vpp = ap->a_vpp; 1006 struct componentname *cnp = ap->a_cnp; 1007 kauth_cred_t cred = cnp->cn_cred; 1008 struct lwp *l = curlwp; 1009 /* locals */ 1010 int error; 1011 struct cnode *cp; 1012 const char *nm = cnp->cn_nameptr; 1013 int len = cnp->cn_namelen; 1014 CodaFid VFid; 1015 struct vattr attr; 1016 1017 MARK_ENTRY(CODA_CREATE_STATS); 1018 1019 /* All creates are exclusive XXX */ 1020 /* I'm assuming the 'mode' argument is the file mode bits XXX */ 1021 1022 /* Check for create of control object. */ 1023 if (IS_CTL_NAME(dvp, nm, len)) { 1024 *vpp = (vnode_t *)0; 1025 MARK_INT_FAIL(CODA_CREATE_STATS); 1026 return(EACCES); 1027 } 1028 1029 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, l, &VFid, &attr); 1030 1031 if (!error) { 1032 1033 /* 1034 * XXX Violation of venus/kernel invariants is a difficult case, 1035 * but venus should not be able to cause a panic. 1036 */ 1037 /* If this is an exclusive create, panic if the file already exists. */ 1038 /* Venus should have detected the file and reported EEXIST. */ 1039 1040 if ((exclusive == 1) && 1041 (coda_find(&VFid) != NULL)) 1042 panic("cnode existed for newly created file!"); 1043 1044 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); 1045 *vpp = CTOV(cp); 1046 1047 /* XXX vnodeops doesn't say this argument can be changed. */ 1048 /* Update va to reflect the new attributes. */ 1049 (*va) = attr; 1050 1051 /* Update the attribute cache and mark it as valid */ 1052 if (coda_attr_cache) { 1053 VTOC(*vpp)->c_vattr = attr; 1054 VTOC(*vpp)->c_flags |= C_VATTR; 1055 } 1056 1057 /* Invalidate parent's attr cache (modification time has changed). */ 1058 VTOC(dvp)->c_flags &= ~C_VATTR; 1059 1060 /* enter the new vnode in the Name Cache */ 1061 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1062 1063 CODADEBUG(CODA_CREATE, myprintf(("%s: %s, result %d\n", __func__, 1064 coda_f2s(&VFid), error)); ) 1065 } else { 1066 *vpp = (vnode_t *)0; 1067 CODADEBUG(CODA_CREATE, myprintf(("%s: create error %d\n", __func__, 1068 error));) 1069 } 1070 1071 if (!error) { 1072 #ifdef CODA_VERBOSE 1073 if ((cnp->cn_flags & LOCKLEAF) == 0) 1074 /* This should not happen; flags are for lookup only. */ 1075 printf("%s: LOCKLEAF not set!\n", __func__); 1076 #endif 1077 } 1078 1079 return(error); 1080 } 1081 1082 int 1083 coda_remove(void *v) 1084 { 1085 /* true args */ 1086 struct vop_remove_args *ap = v; 1087 vnode_t *dvp = ap->a_dvp; 1088 struct cnode *cp = VTOC(dvp); 1089 vnode_t *vp = ap->a_vp; 1090 struct componentname *cnp = ap->a_cnp; 1091 kauth_cred_t cred = cnp->cn_cred; 1092 struct lwp *l = curlwp; 1093 /* locals */ 1094 int error; 1095 const char *nm = cnp->cn_nameptr; 1096 int len = cnp->cn_namelen; 1097 struct cnode *tp; 1098 1099 MARK_ENTRY(CODA_REMOVE_STATS); 1100 1101 CODADEBUG(CODA_REMOVE, myprintf(("%s: %s in %s\n", __func__, 1102 nm, coda_f2s(&cp->c_fid)));) 1103 1104 /* Remove the file's entry from the CODA Name Cache */ 1105 /* We're being conservative here, it might be that this person 1106 * doesn't really have sufficient access to delete the file 1107 * but we feel zapping the entry won't really hurt anyone -- dcs 1108 */ 1109 /* I'm gonna go out on a limb here. If a file and a hardlink to it 1110 * exist, and one is removed, the link count on the other will be 1111 * off by 1. We could either invalidate the attrs if cached, or 1112 * fix them. I'll try to fix them. DCS 11/8/94 1113 */ 1114 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); 1115 if (tp) { 1116 if (VALID_VATTR(tp)) { /* If attrs are cached */ 1117 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ 1118 tp->c_vattr.va_nlink--; 1119 } 1120 } 1121 1122 coda_nc_zapfile(VTOC(dvp), nm, len); 1123 /* No need to flush it if it doesn't exist! */ 1124 } 1125 /* Invalidate the parent's attr cache, the modification time has changed */ 1126 VTOC(dvp)->c_flags &= ~C_VATTR; 1127 1128 /* Check for remove of control object. */ 1129 if (IS_CTL_NAME(dvp, nm, len)) { 1130 MARK_INT_FAIL(CODA_REMOVE_STATS); 1131 return(ENOENT); 1132 } 1133 1134 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, l); 1135 1136 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) 1137 1138 /* 1139 * Unlock parent and child (avoiding double if "."). 1140 */ 1141 if (dvp == vp) { 1142 vrele(vp); 1143 } else { 1144 vput(vp); 1145 } 1146 vput(dvp); 1147 1148 return(error); 1149 } 1150 1151 /* 1152 * dvp is the directory where the link is to go, and is locked. 1153 * vp is the object to be linked to, and is unlocked. 1154 * At exit, we must unlock dvp, and vput dvp. 1155 */ 1156 int 1157 coda_link(void *v) 1158 { 1159 /* true args */ 1160 struct vop_link_args *ap = v; 1161 vnode_t *vp = ap->a_vp; 1162 struct cnode *cp = VTOC(vp); 1163 vnode_t *dvp = ap->a_dvp; 1164 struct cnode *dcp = VTOC(dvp); 1165 struct componentname *cnp = ap->a_cnp; 1166 kauth_cred_t cred = cnp->cn_cred; 1167 struct lwp *l = curlwp; 1168 /* locals */ 1169 int error; 1170 const char *nm = cnp->cn_nameptr; 1171 int len = cnp->cn_namelen; 1172 1173 MARK_ENTRY(CODA_LINK_STATS); 1174 1175 if (codadebug & CODADBGMSK(CODA_LINK)) { 1176 1177 myprintf(("%s: vp fid: %s\n", __func__, coda_f2s(&cp->c_fid))); 1178 myprintf(("%s: dvp fid: %s)\n", __func__, coda_f2s(&dcp->c_fid))); 1179 1180 } 1181 if (codadebug & CODADBGMSK(CODA_LINK)) { 1182 myprintf(("%s: vp fid: %s\n", __func__, coda_f2s(&cp->c_fid))); 1183 myprintf(("%s: dvp fid: %s\n", __func__, coda_f2s(&dcp->c_fid))); 1184 1185 } 1186 1187 /* Check for link to/from control object. */ 1188 if (IS_CTL_NAME(dvp, nm, len) || IS_CTL_VP(vp)) { 1189 MARK_INT_FAIL(CODA_LINK_STATS); 1190 return(EACCES); 1191 } 1192 1193 /* If linking . to a name, error out earlier. */ 1194 if (vp == dvp) { 1195 #ifdef CODA_VERBOSE 1196 printf("%s coda_link vp==dvp\n", __func__); 1197 #endif 1198 error = EISDIR; 1199 goto exit; 1200 } 1201 1202 /* XXX Why does venus_link need the vnode to be locked?*/ 1203 if ((error = vn_lock(vp, LK_EXCLUSIVE)) != 0) { 1204 #ifdef CODA_VERBOSE 1205 printf("%s: couldn't lock vnode %p\n", __func__, vp); 1206 #endif 1207 error = EFAULT; /* XXX better value */ 1208 goto exit; 1209 } 1210 error = venus_link(vtomi(vp), &cp->c_fid, &dcp->c_fid, nm, len, cred, l); 1211 VOP_UNLOCK(vp); 1212 1213 /* Invalidate parent's attr cache (the modification time has changed). */ 1214 VTOC(dvp)->c_flags &= ~C_VATTR; 1215 /* Invalidate child's attr cache (XXX why). */ 1216 VTOC(vp)->c_flags &= ~C_VATTR; 1217 1218 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) 1219 1220 exit: 1221 vput(dvp); 1222 return(error); 1223 } 1224 1225 int 1226 coda_rename(void *v) 1227 { 1228 /* true args */ 1229 struct vop_rename_args *ap = v; 1230 vnode_t *odvp = ap->a_fdvp; 1231 struct cnode *odcp = VTOC(odvp); 1232 struct componentname *fcnp = ap->a_fcnp; 1233 vnode_t *ndvp = ap->a_tdvp; 1234 struct cnode *ndcp = VTOC(ndvp); 1235 struct componentname *tcnp = ap->a_tcnp; 1236 kauth_cred_t cred = fcnp->cn_cred; 1237 struct lwp *l = curlwp; 1238 /* true args */ 1239 int error; 1240 const char *fnm = fcnp->cn_nameptr; 1241 int flen = fcnp->cn_namelen; 1242 const char *tnm = tcnp->cn_nameptr; 1243 int tlen = tcnp->cn_namelen; 1244 1245 MARK_ENTRY(CODA_RENAME_STATS); 1246 1247 /* Hmmm. The vnodes are already looked up. Perhaps they are locked? 1248 This could be Bad. XXX */ 1249 #ifdef OLD_DIAGNOSTIC 1250 if ((fcnp->cn_cred != tcnp->cn_cred) 1251 || (fcnp->cn_lwp != tcnp->cn_lwp)) 1252 { 1253 panic("%s: component names don't agree", __func__); 1254 } 1255 #endif 1256 1257 /* Check for rename involving control object. */ 1258 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { 1259 MARK_INT_FAIL(CODA_RENAME_STATS); 1260 return(EACCES); 1261 } 1262 1263 /* Problem with moving directories -- need to flush entry for .. */ 1264 if (odvp != ndvp) { 1265 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); 1266 if (ovcp) { 1267 vnode_t *ovp = CTOV(ovcp); 1268 if ((ovp) && 1269 (ovp->v_type == VDIR)) /* If it's a directory */ 1270 coda_nc_zapfile(VTOC(ovp),"..", 2); 1271 } 1272 } 1273 1274 /* Remove the entries for both source and target files */ 1275 coda_nc_zapfile(VTOC(odvp), fnm, flen); 1276 coda_nc_zapfile(VTOC(ndvp), tnm, tlen); 1277 1278 /* Invalidate the parent's attr cache, the modification time has changed */ 1279 VTOC(odvp)->c_flags &= ~C_VATTR; 1280 VTOC(ndvp)->c_flags &= ~C_VATTR; 1281 1282 if (flen+1 > CODA_MAXNAMLEN) { 1283 MARK_INT_FAIL(CODA_RENAME_STATS); 1284 error = EINVAL; 1285 goto exit; 1286 } 1287 1288 if (tlen+1 > CODA_MAXNAMLEN) { 1289 MARK_INT_FAIL(CODA_RENAME_STATS); 1290 error = EINVAL; 1291 goto exit; 1292 } 1293 1294 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, l); 1295 1296 exit: 1297 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) 1298 /* XXX - do we need to call cache pureg on the moved vnode? */ 1299 cache_purge(ap->a_fvp); 1300 1301 /* It seems to be incumbent on us to drop locks on all four vnodes */ 1302 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ 1303 1304 vrele(ap->a_fvp); 1305 vrele(odvp); 1306 1307 if (ap->a_tvp) { 1308 if (ap->a_tvp == ndvp) { 1309 vrele(ap->a_tvp); 1310 } else { 1311 vput(ap->a_tvp); 1312 } 1313 } 1314 1315 vput(ndvp); 1316 return(error); 1317 } 1318 1319 int 1320 coda_mkdir(void *v) 1321 { 1322 /* true args */ 1323 struct vop_mkdir_v3_args *ap = v; 1324 vnode_t *dvp = ap->a_dvp; 1325 struct cnode *dcp = VTOC(dvp); 1326 struct componentname *cnp = ap->a_cnp; 1327 struct vattr *va = ap->a_vap; 1328 vnode_t **vpp = ap->a_vpp; 1329 kauth_cred_t cred = cnp->cn_cred; 1330 struct lwp *l = curlwp; 1331 /* locals */ 1332 int error; 1333 const char *nm = cnp->cn_nameptr; 1334 int len = cnp->cn_namelen; 1335 struct cnode *cp; 1336 CodaFid VFid; 1337 struct vattr ova; 1338 1339 MARK_ENTRY(CODA_MKDIR_STATS); 1340 1341 /* Check for mkdir of target object. */ 1342 if (IS_CTL_NAME(dvp, nm, len)) { 1343 *vpp = (vnode_t *)0; 1344 MARK_INT_FAIL(CODA_MKDIR_STATS); 1345 return(EACCES); 1346 } 1347 1348 if (len+1 > CODA_MAXNAMLEN) { 1349 *vpp = (vnode_t *)0; 1350 MARK_INT_FAIL(CODA_MKDIR_STATS); 1351 return(EACCES); 1352 } 1353 1354 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, l, &VFid, &ova); 1355 1356 if (!error) { 1357 if (coda_find(&VFid) != NULL) 1358 panic("cnode existed for newly created directory!"); 1359 1360 1361 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); 1362 *vpp = CTOV(cp); 1363 1364 /* enter the new vnode in the Name Cache */ 1365 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1366 1367 /* as a side effect, enter "." and ".." for the directory */ 1368 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); 1369 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); 1370 1371 if (coda_attr_cache) { 1372 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ 1373 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ 1374 } 1375 1376 /* Invalidate the parent's attr cache, the modification time has changed */ 1377 VTOC(dvp)->c_flags &= ~C_VATTR; 1378 1379 CODADEBUG( CODA_MKDIR, myprintf(("%s: %s result %d\n", __func__, 1380 coda_f2s(&VFid), error)); ) 1381 } else { 1382 *vpp = (vnode_t *)0; 1383 CODADEBUG(CODA_MKDIR, myprintf(("%s error %d\n", __func__, error));) 1384 } 1385 1386 return(error); 1387 } 1388 1389 int 1390 coda_rmdir(void *v) 1391 { 1392 /* true args */ 1393 struct vop_rmdir_args *ap = v; 1394 vnode_t *dvp = ap->a_dvp; 1395 struct cnode *dcp = VTOC(dvp); 1396 vnode_t *vp = ap->a_vp; 1397 struct componentname *cnp = ap->a_cnp; 1398 kauth_cred_t cred = cnp->cn_cred; 1399 struct lwp *l = curlwp; 1400 /* true args */ 1401 int error; 1402 const char *nm = cnp->cn_nameptr; 1403 int len = cnp->cn_namelen; 1404 struct cnode *cp; 1405 1406 MARK_ENTRY(CODA_RMDIR_STATS); 1407 1408 /* Check for rmdir of control object. */ 1409 if (IS_CTL_NAME(dvp, nm, len)) { 1410 MARK_INT_FAIL(CODA_RMDIR_STATS); 1411 return(ENOENT); 1412 } 1413 1414 /* Can't remove . in self. */ 1415 if (dvp == vp) { 1416 #ifdef CODA_VERBOSE 1417 printf("%s: dvp == vp\n", __func__); 1418 #endif 1419 error = EINVAL; 1420 goto exit; 1421 } 1422 1423 /* 1424 * The caller may not have adequate permissions, and the venus 1425 * operation may fail, but it doesn't hurt from a correctness 1426 * viewpoint to invalidate cache entries. 1427 * XXX Why isn't this done after the venus_rmdir call? 1428 */ 1429 /* Look up child in name cache (by name, from parent). */ 1430 cp = coda_nc_lookup(dcp, nm, len, cred); 1431 /* If found, remove all children of the child (., ..). */ 1432 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); 1433 1434 /* Remove child's own entry. */ 1435 coda_nc_zapfile(dcp, nm, len); 1436 1437 /* Invalidate parent's attr cache (the modification time has changed). */ 1438 dcp->c_flags &= ~C_VATTR; 1439 1440 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, l); 1441 1442 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) 1443 1444 exit: 1445 /* vput both vnodes */ 1446 vput(dvp); 1447 if (dvp == vp) { 1448 vrele(vp); 1449 } else { 1450 vput(vp); 1451 } 1452 1453 return(error); 1454 } 1455 1456 int 1457 coda_symlink(void *v) 1458 { 1459 /* true args */ 1460 struct vop_symlink_v3_args *ap = v; 1461 vnode_t *dvp = ap->a_dvp; 1462 struct cnode *dcp = VTOC(dvp); 1463 /* a_vpp is used in place below */ 1464 struct componentname *cnp = ap->a_cnp; 1465 struct vattr *tva = ap->a_vap; 1466 char *path = ap->a_target; 1467 kauth_cred_t cred = cnp->cn_cred; 1468 struct lwp *l = curlwp; 1469 /* locals */ 1470 int error; 1471 u_long saved_cn_flags; 1472 const char *nm = cnp->cn_nameptr; 1473 int len = cnp->cn_namelen; 1474 int plen = strlen(path); 1475 1476 /* 1477 * Here's the strategy for the moment: perform the symlink, then 1478 * do a lookup to grab the resulting vnode. I know this requires 1479 * two communications with Venus for a new sybolic link, but 1480 * that's the way the ball bounces. I don't yet want to change 1481 * the way the Mach symlink works. When Mach support is 1482 * deprecated, we should change symlink so that the common case 1483 * returns the resultant vnode in a vpp argument. 1484 */ 1485 1486 MARK_ENTRY(CODA_SYMLINK_STATS); 1487 1488 /* Check for symlink of control object. */ 1489 if (IS_CTL_NAME(dvp, nm, len)) { 1490 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1491 error = EACCES; 1492 goto exit; 1493 } 1494 1495 if (plen+1 > CODA_MAXPATHLEN) { 1496 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1497 error = EINVAL; 1498 goto exit; 1499 } 1500 1501 if (len+1 > CODA_MAXNAMLEN) { 1502 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1503 error = EINVAL; 1504 goto exit; 1505 } 1506 1507 error = venus_symlink(vtomi(dvp), &dcp->c_fid, path, plen, nm, len, tva, cred, l); 1508 1509 /* Invalidate the parent's attr cache (modification time has changed). */ 1510 dcp->c_flags &= ~C_VATTR; 1511 1512 if (!error) { 1513 /* 1514 * VOP_SYMLINK is not defined to pay attention to cnp->cn_flags; 1515 * these are defined only for VOP_LOOKUP. We desire to reuse 1516 * cnp for a VOP_LOOKUP operation, and must be sure to not pass 1517 * stray flags passed to us. Such stray flags can occur because 1518 * sys_symlink makes a namei call and then reuses the 1519 * componentname structure. 1520 */ 1521 /* 1522 * XXX Arguably we should create our own componentname structure 1523 * and not reuse the one that was passed in. 1524 */ 1525 saved_cn_flags = cnp->cn_flags; 1526 cnp->cn_flags &= ~(MODMASK | OPMASK); 1527 cnp->cn_flags |= LOOKUP; 1528 error = VOP_LOOKUP(dvp, ap->a_vpp, cnp); 1529 cnp->cn_flags = saved_cn_flags; 1530 } 1531 1532 exit: 1533 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) 1534 return(error); 1535 } 1536 1537 /* 1538 * Read directory entries. 1539 */ 1540 int 1541 coda_readdir(void *v) 1542 { 1543 /* true args */ 1544 struct vop_readdir_args *ap = v; 1545 vnode_t *vp = ap->a_vp; 1546 struct cnode *cp = VTOC(vp); 1547 struct uio *uiop = ap->a_uio; 1548 kauth_cred_t cred = ap->a_cred; 1549 int *eofflag = ap->a_eofflag; 1550 off_t **cookies = ap->a_cookies; 1551 int *ncookies = ap->a_ncookies; 1552 /* upcall decl */ 1553 /* locals */ 1554 int error = 0; 1555 1556 MARK_ENTRY(CODA_READDIR_STATS); 1557 1558 CODADEBUG(CODA_READDIR, myprintf(("%s: (%p, %lu, %lld)\n", __func__, 1559 uiop->uio_iov->iov_base, (unsigned long) uiop->uio_resid, 1560 (long long) uiop->uio_offset)); ) 1561 1562 /* Check for readdir of control object. */ 1563 if (IS_CTL_VP(vp)) { 1564 MARK_INT_FAIL(CODA_READDIR_STATS); 1565 return(ENOENT); 1566 } 1567 1568 { 1569 /* Redirect the request to UFS. */ 1570 1571 /* If directory is not already open do an "internal open" on it. */ 1572 int opened_internally = 0; 1573 if (cp->c_ovp == NULL) { 1574 opened_internally = 1; 1575 MARK_INT_GEN(CODA_OPEN_STATS); 1576 error = VOP_OPEN(vp, FREAD, cred); 1577 #ifdef CODA_VERBOSE 1578 printf("%s: Internally Opening %p\n", __func__, vp); 1579 #endif 1580 if (error) return(error); 1581 } else 1582 vp = cp->c_ovp; 1583 1584 /* Have UFS handle the call. */ 1585 CODADEBUG(CODA_READDIR, myprintf(("%s: fid = %s, refcnt = %d\n", 1586 __func__, coda_f2s(&cp->c_fid), vp->v_usecount)); ) 1587 error = VOP_READDIR(vp, uiop, cred, eofflag, cookies, ncookies); 1588 if (error) 1589 MARK_INT_FAIL(CODA_READDIR_STATS); 1590 else 1591 MARK_INT_SAT(CODA_READDIR_STATS); 1592 1593 /* Do an "internal close" if necessary. */ 1594 if (opened_internally) { 1595 MARK_INT_GEN(CODA_CLOSE_STATS); 1596 (void)VOP_CLOSE(vp, FREAD, cred); 1597 } 1598 } 1599 1600 return(error); 1601 } 1602 1603 /* 1604 * Convert from file system blocks to device blocks 1605 */ 1606 int 1607 coda_bmap(void *v) 1608 { 1609 /* XXX on the global proc */ 1610 /* true args */ 1611 struct vop_bmap_args *ap = v; 1612 vnode_t *vp __unused = ap->a_vp; /* file's vnode */ 1613 daddr_t bn __unused = ap->a_bn; /* fs block number */ 1614 vnode_t **vpp = ap->a_vpp; /* RETURN vp of device */ 1615 daddr_t *bnp __unused = ap->a_bnp; /* RETURN device block number */ 1616 struct lwp *l __unused = curlwp; 1617 /* upcall decl */ 1618 /* locals */ 1619 1620 *vpp = (vnode_t *)0; 1621 myprintf(("coda_bmap called!\n")); 1622 return(EINVAL); 1623 } 1624 1625 /* 1626 * I don't think the following two things are used anywhere, so I've 1627 * commented them out 1628 * 1629 * struct buf *async_bufhead; 1630 * int async_daemon_count; 1631 */ 1632 int 1633 coda_strategy(void *v) 1634 { 1635 /* true args */ 1636 struct vop_strategy_args *ap = v; 1637 struct buf *bp __unused = ap->a_bp; 1638 struct lwp *l __unused = curlwp; 1639 /* upcall decl */ 1640 /* locals */ 1641 1642 myprintf(("coda_strategy called! ")); 1643 return(EINVAL); 1644 } 1645 1646 int 1647 coda_reclaim(void *v) 1648 { 1649 /* true args */ 1650 struct vop_reclaim_args *ap = v; 1651 vnode_t *vp = ap->a_vp; 1652 struct cnode *cp = VTOC(vp); 1653 /* upcall decl */ 1654 /* locals */ 1655 1656 /* 1657 * Forced unmount/flush will let vnodes with non zero use be destroyed! 1658 */ 1659 ENTRY; 1660 1661 if (IS_UNMOUNTING(cp)) { 1662 #ifdef DEBUG 1663 if (VTOC(vp)->c_ovp) { 1664 if (IS_UNMOUNTING(cp)) 1665 printf("%s: c_ovp not void: vp %p, cp %p\n", __func__, vp, cp); 1666 } 1667 #endif 1668 } else { 1669 #ifdef OLD_DIAGNOSTIC 1670 if (vp->v_usecount != 0) 1671 print("%s: pushing active %p\n", __func__, vp); 1672 if (VTOC(vp)->c_ovp) { 1673 panic("%s: c_ovp not void", __func__); 1674 } 1675 #endif 1676 } 1677 coda_free(VTOC(vp)); 1678 SET_VTOC(vp) = NULL; 1679 return (0); 1680 } 1681 1682 int 1683 coda_lock(void *v) 1684 { 1685 /* true args */ 1686 struct vop_lock_args *ap = v; 1687 vnode_t *vp = ap->a_vp; 1688 struct cnode *cp = VTOC(vp); 1689 /* upcall decl */ 1690 /* locals */ 1691 1692 ENTRY; 1693 1694 if (coda_lockdebug) { 1695 myprintf(("Attempting lock on %s\n", 1696 coda_f2s(&cp->c_fid))); 1697 } 1698 1699 return genfs_lock(v); 1700 } 1701 1702 int 1703 coda_unlock(void *v) 1704 { 1705 /* true args */ 1706 struct vop_unlock_args *ap = v; 1707 vnode_t *vp = ap->a_vp; 1708 struct cnode *cp = VTOC(vp); 1709 /* upcall decl */ 1710 /* locals */ 1711 1712 ENTRY; 1713 if (coda_lockdebug) { 1714 myprintf(("Attempting unlock on %s\n", 1715 coda_f2s(&cp->c_fid))); 1716 } 1717 1718 return genfs_unlock(v); 1719 } 1720 1721 int 1722 coda_islocked(void *v) 1723 { 1724 /* true args */ 1725 ENTRY; 1726 1727 return genfs_islocked(v); 1728 } 1729 1730 /* 1731 * Given a device and inode, obtain a locked vnode. One reference is 1732 * obtained and passed back to the caller. 1733 */ 1734 int 1735 coda_grab_vnode(vnode_t *uvp, dev_t dev, ino_t ino, vnode_t **vpp) 1736 { 1737 int error; 1738 struct mount *mp; 1739 1740 /* Obtain mount point structure from device. */ 1741 if (!(mp = devtomp(dev))) { 1742 myprintf(("%s: devtomp(0x%llx) returns NULL\n", __func__, 1743 (unsigned long long)dev)); 1744 return(ENXIO); 1745 } 1746 1747 /* 1748 * Obtain vnode from mount point and inode. 1749 */ 1750 error = VFS_VGET(mp, ino, vpp); 1751 if (error) { 1752 myprintf(("%s: iget/vget(0x%llx, %llu) returns %p, err %d\n", __func__, 1753 (unsigned long long)dev, (unsigned long long)ino, *vpp, error)); 1754 return(ENOENT); 1755 } 1756 /* share the underlying vnode lock with the coda vnode */ 1757 mutex_obj_hold((*vpp)->v_interlock); 1758 uvm_obj_setlock(&uvp->v_uobj, (*vpp)->v_interlock); 1759 KASSERT(VOP_ISLOCKED(*vpp)); 1760 return(0); 1761 } 1762 1763 static void 1764 coda_print_vattr(struct vattr *attr) 1765 { 1766 const char *typestr; 1767 1768 switch (attr->va_type) { 1769 case VNON: 1770 typestr = "VNON"; 1771 break; 1772 case VREG: 1773 typestr = "VREG"; 1774 break; 1775 case VDIR: 1776 typestr = "VDIR"; 1777 break; 1778 case VBLK: 1779 typestr = "VBLK"; 1780 break; 1781 case VCHR: 1782 typestr = "VCHR"; 1783 break; 1784 case VLNK: 1785 typestr = "VLNK"; 1786 break; 1787 case VSOCK: 1788 typestr = "VSCK"; 1789 break; 1790 case VFIFO: 1791 typestr = "VFFO"; 1792 break; 1793 case VBAD: 1794 typestr = "VBAD"; 1795 break; 1796 default: 1797 typestr = "????"; 1798 break; 1799 } 1800 1801 1802 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", 1803 typestr, (int)attr->va_mode, (int)attr->va_uid, 1804 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); 1805 1806 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", 1807 (int)attr->va_fileid, (int)attr->va_nlink, 1808 (int)attr->va_size, 1809 (int)attr->va_blocksize,(int)attr->va_bytes)); 1810 myprintf((" gen %ld flags %ld vaflags %d\n", 1811 attr->va_gen, attr->va_flags, attr->va_vaflags)); 1812 myprintf((" atime sec %d nsec %d\n", 1813 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); 1814 myprintf((" mtime sec %d nsec %d\n", 1815 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); 1816 myprintf((" ctime sec %d nsec %d\n", 1817 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); 1818 } 1819 1820 /* 1821 * Return a vnode for the given fid. 1822 * If no cnode exists for this fid create one and put it 1823 * in a table hashed by coda_f2i(). If the cnode for 1824 * this fid is already in the table return it (ref count is 1825 * incremented by coda_find. The cnode will be flushed from the 1826 * table when coda_inactive calls coda_unsave. 1827 */ 1828 struct cnode * 1829 make_coda_node(CodaFid *fid, struct mount *fvsp, short type) 1830 { 1831 struct cnode *cp; 1832 int error; 1833 1834 if ((cp = coda_find(fid)) == NULL) { 1835 vnode_t *vp; 1836 1837 cp = coda_alloc(); 1838 cp->c_fid = *fid; 1839 1840 error = getnewvnode(VT_CODA, fvsp, coda_vnodeop_p, NULL, &vp); 1841 if (error) { 1842 panic("%s: getnewvnode returned error %d", __func__, error); 1843 } 1844 vp->v_data = cp; 1845 vp->v_type = type; 1846 cp->c_vnode = vp; 1847 uvm_vnp_setsize(vp, 0); 1848 coda_save(cp); 1849 1850 } else { 1851 vref(CTOV(cp)); 1852 } 1853 1854 return cp; 1855 } 1856 1857 /* 1858 * coda_getpages may be called on a vnode which has not been opened, 1859 * e.g. to fault in pages to execute a program. In that case, we must 1860 * open the file to get the container. The vnode may or may not be 1861 * locked, and we must leave it in the same state. 1862 */ 1863 int 1864 coda_getpages(void *v) 1865 { 1866 struct vop_getpages_args /* { 1867 vnode_t *a_vp; 1868 voff_t a_offset; 1869 struct vm_page **a_m; 1870 int *a_count; 1871 int a_centeridx; 1872 vm_prot_t a_access_type; 1873 int a_advice; 1874 int a_flags; 1875 } */ *ap = v; 1876 vnode_t *vp = ap->a_vp, *cvp; 1877 struct cnode *cp = VTOC(vp); 1878 struct lwp *l = curlwp; 1879 kauth_cred_t cred = l->l_cred; 1880 int error, cerror; 1881 int waslocked; /* 1 if vnode lock was held on entry */ 1882 int didopen = 0; /* 1 if we opened container file */ 1883 1884 /* 1885 * Handle a case that uvm_fault doesn't quite use yet. 1886 * See layer_vnops.c. for inspiration. 1887 */ 1888 if (ap->a_flags & PGO_LOCKED) { 1889 return EBUSY; 1890 } 1891 1892 KASSERT(mutex_owned(vp->v_interlock)); 1893 1894 /* Check for control object. */ 1895 if (IS_CTL_VP(vp)) { 1896 #ifdef CODA_VERBOSE 1897 printf("%s: control object %p\n", __func__, vp); 1898 #endif 1899 return(EINVAL); 1900 } 1901 1902 /* 1903 * XXX It's really not ok to be releasing the lock we get, 1904 * because we could be overlapping with another call to 1905 * getpages and drop a lock they are relying on. We need to 1906 * figure out whether getpages ever is called holding the 1907 * lock, and if we should serialize getpages calls by some 1908 * mechanism. 1909 */ 1910 /* XXX VOP_ISLOCKED() may not be used for lock decisions. */ 1911 waslocked = VOP_ISLOCKED(vp); 1912 1913 /* Get container file if not already present. */ 1914 cvp = cp->c_ovp; 1915 if (cvp == NULL) { 1916 /* 1917 * VOP_OPEN requires a locked vnode. We must avoid 1918 * locking the vnode if it is already locked, and 1919 * leave it in the same state on exit. 1920 */ 1921 if (waslocked == 0) { 1922 mutex_exit(vp->v_interlock); 1923 cerror = vn_lock(vp, LK_EXCLUSIVE); 1924 if (cerror) { 1925 #ifdef CODA_VERBOSE 1926 printf("%s: can't lock vnode %p\n", 1927 __func__, vp); 1928 #endif 1929 return cerror; 1930 } 1931 #ifdef CODA_VERBOSE 1932 printf("%s: locked vnode %p\n", __func__, vp); 1933 #endif 1934 } 1935 1936 /* 1937 * Open file (causes upcall to venus). 1938 * XXX Perhaps we should not fully open the file, but 1939 * simply obtain a container file. 1940 */ 1941 /* XXX Is it ok to do this while holding the mutex? */ 1942 cerror = VOP_OPEN(vp, FREAD, cred); 1943 1944 if (cerror) { 1945 #ifdef CODA_VERBOSE 1946 printf("%s: cannot open vnode %p => %d\n", __func__, 1947 vp, cerror); 1948 #endif 1949 if (waslocked == 0) 1950 VOP_UNLOCK(vp); 1951 return cerror; 1952 } 1953 1954 #ifdef CODA_VERBOSE 1955 printf("%s: opened vnode %p\n", __func__, vp); 1956 #endif 1957 cvp = cp->c_ovp; 1958 didopen = 1; 1959 if (waslocked == 0) 1960 mutex_enter(vp->v_interlock); 1961 } 1962 KASSERT(cvp != NULL); 1963 1964 /* Munge the arg structure to refer to the container vnode. */ 1965 KASSERT(cvp->v_interlock == vp->v_interlock); 1966 ap->a_vp = cp->c_ovp; 1967 1968 /* Finally, call getpages on it. */ 1969 error = VCALL(ap->a_vp, VOFFSET(vop_getpages), ap); 1970 1971 /* If we opened the vnode, we must close it. */ 1972 if (didopen) { 1973 /* 1974 * VOP_CLOSE requires a locked vnode, but we are still 1975 * holding the lock (or riding a caller's lock). 1976 */ 1977 cerror = VOP_CLOSE(vp, FREAD, cred); 1978 #ifdef CODA_VERBOSE 1979 if (cerror != 0) 1980 /* XXX How should we handle this? */ 1981 printf("%s: closed vnode %p -> %d\n", __func__, 1982 vp, cerror); 1983 #endif 1984 1985 /* If we obtained a lock, drop it. */ 1986 if (waslocked == 0) 1987 VOP_UNLOCK(vp); 1988 } 1989 1990 return error; 1991 } 1992 1993 /* 1994 * The protocol requires v_interlock to be held by the caller. 1995 */ 1996 int 1997 coda_putpages(void *v) 1998 { 1999 struct vop_putpages_args /* { 2000 vnode_t *a_vp; 2001 voff_t a_offlo; 2002 voff_t a_offhi; 2003 int a_flags; 2004 } */ *ap = v; 2005 vnode_t *vp = ap->a_vp, *cvp; 2006 struct cnode *cp = VTOC(vp); 2007 int error; 2008 2009 KASSERT(mutex_owned(vp->v_interlock)); 2010 2011 /* Check for control object. */ 2012 if (IS_CTL_VP(vp)) { 2013 mutex_exit(vp->v_interlock); 2014 #ifdef CODA_VERBOSE 2015 printf("%s: control object %p\n", __func__, vp); 2016 #endif 2017 return(EINVAL); 2018 } 2019 2020 /* 2021 * If container object is not present, then there are no pages 2022 * to put; just return without error. This happens all the 2023 * time, apparently during discard of a closed vnode (which 2024 * trivially can't have dirty pages). 2025 */ 2026 cvp = cp->c_ovp; 2027 if (cvp == NULL) { 2028 mutex_exit(vp->v_interlock); 2029 return 0; 2030 } 2031 2032 /* Munge the arg structure to refer to the container vnode. */ 2033 KASSERT(cvp->v_interlock == vp->v_interlock); 2034 ap->a_vp = cvp; 2035 2036 /* Finally, call putpages on it. */ 2037 error = VCALL(ap->a_vp, VOFFSET(vop_putpages), ap); 2038 2039 return error; 2040 } 2041
Indexes created Thu Oct 16 14:10:15 GMT 2025