1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed 8 * to Berkeley by John Heidemann of the UCLA Ficus project. 9 * 10 * Source: * @(#)i405_init.c 2.10 92/04/27 UCLA Ficus project 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/bio.h> 43 #include <sys/buf.h> 44 #include <sys/conf.h> 45 #include <sys/event.h> 46 #include <sys/filio.h> 47 #include <sys/kernel.h> 48 #include <sys/limits.h> 49 #include <sys/lock.h> 50 #include <sys/lockf.h> 51 #include <sys/malloc.h> 52 #include <sys/mount.h> 53 #include <sys/namei.h> 54 #include <sys/rwlock.h> 55 #include <sys/fcntl.h> 56 #include <sys/unistd.h> 57 #include <sys/vnode.h> 58 #include <sys/dirent.h> 59 #include <sys/poll.h> 60 #include <sys/stat.h> 61 #include <security/audit/audit.h> 62 #include <sys/priv.h> 63 64 #include <security/mac/mac_framework.h> 65 66 #include <vm/vm.h> 67 #include <vm/vm_object.h> 68 #include <vm/vm_extern.h> 69 #include <vm/pmap.h> 70 #include <vm/vm_map.h> 71 #include <vm/vm_page.h> 72 #include <vm/vm_pager.h> 73 #include <vm/vnode_pager.h> 74 75 static int vop_nolookup(struct vop_lookup_args *); 76 static int vop_norename(struct vop_rename_args *); 77 static int vop_nostrategy(struct vop_strategy_args *); 78 static int get_next_dirent(struct vnode *vp, struct dirent **dpp, 79 char *dirbuf, int dirbuflen, off_t *off, 80 char **cpos, int *len, int *eofflag, 81 struct thread *td); 82 static int dirent_exists(struct vnode *vp, const char *dirname, 83 struct thread *td); 84 85 #define DIRENT_MINSIZE (sizeof(struct dirent) - (MAXNAMLEN+1) + 4) 86 87 static int vop_stdis_text(struct vop_is_text_args *ap); 88 static int vop_stdunset_text(struct vop_unset_text_args *ap); 89 static int vop_stdadd_writecount(struct vop_add_writecount_args *ap); 90 static int vop_stdcopy_file_range(struct vop_copy_file_range_args *ap); 91 static int vop_stdfdatasync(struct vop_fdatasync_args *ap); 92 static int vop_stdgetpages_async(struct vop_getpages_async_args *ap); 93 static int vop_stdread_pgcache(struct vop_read_pgcache_args *ap); 94 static int vop_stdstat(struct vop_stat_args *ap); 95 static int vop_stdvput_pair(struct vop_vput_pair_args *ap); 96 97 /* 98 * This vnode table stores what we want to do if the filesystem doesn't 99 * implement a particular VOP. 100 * 101 * If there is no specific entry here, we will return EOPNOTSUPP. 102 * 103 * Note that every filesystem has to implement either vop_access 104 * or vop_accessx; failing to do so will result in immediate crash 105 * due to stack overflow, as vop_stdaccess() calls vop_stdaccessx(), 106 * which calls vop_stdaccess() etc. 107 */ 108 109 struct vop_vector default_vnodeops = { 110 .vop_default = NULL, 111 .vop_bypass = VOP_EOPNOTSUPP, 112 113 .vop_access = vop_stdaccess, 114 .vop_accessx = vop_stdaccessx, 115 .vop_advise = vop_stdadvise, 116 .vop_advlock = vop_stdadvlock, 117 .vop_advlockasync = vop_stdadvlockasync, 118 .vop_advlockpurge = vop_stdadvlockpurge, 119 .vop_allocate = vop_stdallocate, 120 .vop_bmap = vop_stdbmap, 121 .vop_close = VOP_NULL, 122 .vop_fsync = VOP_NULL, 123 .vop_stat = vop_stdstat, 124 .vop_fdatasync = vop_stdfdatasync, 125 .vop_getpages = vop_stdgetpages, 126 .vop_getpages_async = vop_stdgetpages_async, 127 .vop_getwritemount = vop_stdgetwritemount, 128 .vop_inactive = VOP_NULL, 129 .vop_need_inactive = vop_stdneed_inactive, 130 .vop_ioctl = vop_stdioctl, 131 .vop_kqfilter = vop_stdkqfilter, 132 .vop_islocked = vop_stdislocked, 133 .vop_lock1 = vop_stdlock, 134 .vop_lookup = vop_nolookup, 135 .vop_open = VOP_NULL, 136 .vop_pathconf = VOP_EINVAL, 137 .vop_poll = vop_nopoll, 138 .vop_putpages = vop_stdputpages, 139 .vop_readlink = VOP_EINVAL, 140 .vop_read_pgcache = vop_stdread_pgcache, 141 .vop_rename = vop_norename, 142 .vop_revoke = VOP_PANIC, 143 .vop_strategy = vop_nostrategy, 144 .vop_unlock = vop_stdunlock, 145 .vop_vptocnp = vop_stdvptocnp, 146 .vop_vptofh = vop_stdvptofh, 147 .vop_unp_bind = vop_stdunp_bind, 148 .vop_unp_connect = vop_stdunp_connect, 149 .vop_unp_detach = vop_stdunp_detach, 150 .vop_is_text = vop_stdis_text, 151 .vop_set_text = vop_stdset_text, 152 .vop_unset_text = vop_stdunset_text, 153 .vop_add_writecount = vop_stdadd_writecount, 154 .vop_copy_file_range = vop_stdcopy_file_range, 155 .vop_vput_pair = vop_stdvput_pair, 156 }; 157 VFS_VOP_VECTOR_REGISTER(default_vnodeops); 158 159 /* 160 * Series of placeholder functions for various error returns for 161 * VOPs. 162 */ 163 164 int 165 vop_eopnotsupp(struct vop_generic_args *ap) 166 { 167 /* 168 printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name); 169 */ 170 171 return (EOPNOTSUPP); 172 } 173 174 int 175 vop_ebadf(struct vop_generic_args *ap) 176 { 177 178 return (EBADF); 179 } 180 181 int 182 vop_enotty(struct vop_generic_args *ap) 183 { 184 185 return (ENOTTY); 186 } 187 188 int 189 vop_einval(struct vop_generic_args *ap) 190 { 191 192 return (EINVAL); 193 } 194 195 int 196 vop_enoent(struct vop_generic_args *ap) 197 { 198 199 return (ENOENT); 200 } 201 202 int 203 vop_eagain(struct vop_generic_args *ap) 204 { 205 206 return (EAGAIN); 207 } 208 209 int 210 vop_null(struct vop_generic_args *ap) 211 { 212 213 return (0); 214 } 215 216 /* 217 * Helper function to panic on some bad VOPs in some filesystems. 218 */ 219 int 220 vop_panic(struct vop_generic_args *ap) 221 { 222 223 panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name); 224 } 225 226 /* 227 * vop_std<something> and vop_no<something> are default functions for use by 228 * filesystems that need the "default reasonable" implementation for a 229 * particular operation. 230 * 231 * The documentation for the operations they implement exists (if it exists) 232 * in the VOP_<SOMETHING>(9) manpage (all uppercase). 233 */ 234 235 /* 236 * Default vop for filesystems that do not support name lookup 237 */ 238 static int 239 vop_nolookup(ap) 240 struct vop_lookup_args /* { 241 struct vnode *a_dvp; 242 struct vnode **a_vpp; 243 struct componentname *a_cnp; 244 } */ *ap; 245 { 246 247 *ap->a_vpp = NULL; 248 return (ENOTDIR); 249 } 250 251 /* 252 * vop_norename: 253 * 254 * Handle unlock and reference counting for arguments of vop_rename 255 * for filesystems that do not implement rename operation. 256 */ 257 static int 258 vop_norename(struct vop_rename_args *ap) 259 { 260 261 vop_rename_fail(ap); 262 return (EOPNOTSUPP); 263 } 264 265 /* 266 * vop_nostrategy: 267 * 268 * Strategy routine for VFS devices that have none. 269 * 270 * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy 271 * routine. Typically this is done for a BIO_READ strategy call. 272 * Typically B_INVAL is assumed to already be clear prior to a write 273 * and should not be cleared manually unless you just made the buffer 274 * invalid. BIO_ERROR should be cleared either way. 275 */ 276 277 static int 278 vop_nostrategy (struct vop_strategy_args *ap) 279 { 280 printf("No strategy for buffer at %p\n", ap->a_bp); 281 vn_printf(ap->a_vp, "vnode "); 282 ap->a_bp->b_ioflags |= BIO_ERROR; 283 ap->a_bp->b_error = EOPNOTSUPP; 284 bufdone(ap->a_bp); 285 return (EOPNOTSUPP); 286 } 287 288 static int 289 get_next_dirent(struct vnode *vp, struct dirent **dpp, char *dirbuf, 290 int dirbuflen, off_t *off, char **cpos, int *len, 291 int *eofflag, struct thread *td) 292 { 293 int error, reclen; 294 struct uio uio; 295 struct iovec iov; 296 struct dirent *dp; 297 298 KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp)); 299 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp)); 300 301 if (*len == 0) { 302 iov.iov_base = dirbuf; 303 iov.iov_len = dirbuflen; 304 305 uio.uio_iov = &iov; 306 uio.uio_iovcnt = 1; 307 uio.uio_offset = *off; 308 uio.uio_resid = dirbuflen; 309 uio.uio_segflg = UIO_SYSSPACE; 310 uio.uio_rw = UIO_READ; 311 uio.uio_td = td; 312 313 *eofflag = 0; 314 315 #ifdef MAC 316 error = mac_vnode_check_readdir(td->td_ucred, vp); 317 if (error == 0) 318 #endif 319 error = VOP_READDIR(vp, &uio, td->td_ucred, eofflag, 320 NULL, NULL); 321 if (error) 322 return (error); 323 324 *off = uio.uio_offset; 325 326 *cpos = dirbuf; 327 *len = (dirbuflen - uio.uio_resid); 328 329 if (*len == 0) 330 return (ENOENT); 331 } 332 333 dp = (struct dirent *)(*cpos); 334 reclen = dp->d_reclen; 335 *dpp = dp; 336 337 /* check for malformed directory.. */ 338 if (reclen < DIRENT_MINSIZE) 339 return (EINVAL); 340 341 *cpos += reclen; 342 *len -= reclen; 343 344 return (0); 345 } 346 347 /* 348 * Check if a named file exists in a given directory vnode. 349 */ 350 static int 351 dirent_exists(struct vnode *vp, const char *dirname, struct thread *td) 352 { 353 char *dirbuf, *cpos; 354 int error, eofflag, dirbuflen, len, found; 355 off_t off; 356 struct dirent *dp; 357 struct vattr va; 358 359 KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp)); 360 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp)); 361 362 found = 0; 363 364 error = VOP_GETATTR(vp, &va, td->td_ucred); 365 if (error) 366 return (found); 367 368 dirbuflen = DEV_BSIZE; 369 if (dirbuflen < va.va_blocksize) 370 dirbuflen = va.va_blocksize; 371 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK); 372 373 off = 0; 374 len = 0; 375 do { 376 error = get_next_dirent(vp, &dp, dirbuf, dirbuflen, &off, 377 &cpos, &len, &eofflag, td); 378 if (error) 379 goto out; 380 381 if (dp->d_type != DT_WHT && dp->d_fileno != 0 && 382 strcmp(dp->d_name, dirname) == 0) { 383 found = 1; 384 goto out; 385 } 386 } while (len > 0 || !eofflag); 387 388 out: 389 free(dirbuf, M_TEMP); 390 return (found); 391 } 392 393 int 394 vop_stdaccess(struct vop_access_args *ap) 395 { 396 397 KASSERT((ap->a_accmode & ~(VEXEC | VWRITE | VREAD | VADMIN | 398 VAPPEND)) == 0, ("invalid bit in accmode")); 399 400 return (VOP_ACCESSX(ap->a_vp, ap->a_accmode, ap->a_cred, ap->a_td)); 401 } 402 403 int 404 vop_stdaccessx(struct vop_accessx_args *ap) 405 { 406 int error; 407 accmode_t accmode = ap->a_accmode; 408 409 error = vfs_unixify_accmode(&accmode); 410 if (error != 0) 411 return (error); 412 413 if (accmode == 0) 414 return (0); 415 416 return (VOP_ACCESS(ap->a_vp, accmode, ap->a_cred, ap->a_td)); 417 } 418 419 /* 420 * Advisory record locking support 421 */ 422 int 423 vop_stdadvlock(struct vop_advlock_args *ap) 424 { 425 struct vnode *vp; 426 struct mount *mp; 427 struct vattr vattr; 428 int error; 429 430 vp = ap->a_vp; 431 432 /* 433 * Provide atomicity of open(O_CREAT | O_EXCL | O_EXLOCK) for 434 * local filesystems. See vn_open_cred() for reciprocal part. 435 */ 436 mp = vp->v_mount; 437 if (mp != NULL && (mp->mnt_flag & MNT_LOCAL) != 0 && 438 ap->a_op == F_SETLK && (ap->a_flags & F_FIRSTOPEN) == 0) { 439 VI_LOCK(vp); 440 while ((vp->v_iflag & VI_FOPENING) != 0) 441 msleep(vp, VI_MTX(vp), PLOCK, "lockfo", 0); 442 VI_UNLOCK(vp); 443 } 444 445 if (ap->a_fl->l_whence == SEEK_END) { 446 /* 447 * The NFSv4 server must avoid doing a vn_lock() here, since it 448 * can deadlock the nfsd threads, due to a LOR. Fortunately 449 * the NFSv4 server always uses SEEK_SET and this code is 450 * only required for the SEEK_END case. 451 */ 452 vn_lock(vp, LK_SHARED | LK_RETRY); 453 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 454 VOP_UNLOCK(vp); 455 if (error) 456 return (error); 457 } else 458 vattr.va_size = 0; 459 460 return (lf_advlock(ap, &(vp->v_lockf), vattr.va_size)); 461 } 462 463 int 464 vop_stdadvlockasync(struct vop_advlockasync_args *ap) 465 { 466 struct vnode *vp; 467 struct vattr vattr; 468 int error; 469 470 vp = ap->a_vp; 471 if (ap->a_fl->l_whence == SEEK_END) { 472 /* The size argument is only needed for SEEK_END. */ 473 vn_lock(vp, LK_SHARED | LK_RETRY); 474 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 475 VOP_UNLOCK(vp); 476 if (error) 477 return (error); 478 } else 479 vattr.va_size = 0; 480 481 return (lf_advlockasync(ap, &(vp->v_lockf), vattr.va_size)); 482 } 483 484 int 485 vop_stdadvlockpurge(struct vop_advlockpurge_args *ap) 486 { 487 struct vnode *vp; 488 489 vp = ap->a_vp; 490 lf_purgelocks(vp, &vp->v_lockf); 491 return (0); 492 } 493 494 /* 495 * vop_stdpathconf: 496 * 497 * Standard implementation of POSIX pathconf, to get information about limits 498 * for a filesystem. 499 * Override per filesystem for the case where the filesystem has smaller 500 * limits. 501 */ 502 int 503 vop_stdpathconf(ap) 504 struct vop_pathconf_args /* { 505 struct vnode *a_vp; 506 int a_name; 507 int *a_retval; 508 } */ *ap; 509 { 510 511 switch (ap->a_name) { 512 case _PC_ASYNC_IO: 513 *ap->a_retval = _POSIX_ASYNCHRONOUS_IO; 514 return (0); 515 case _PC_PATH_MAX: 516 *ap->a_retval = PATH_MAX; 517 return (0); 518 case _PC_ACL_EXTENDED: 519 case _PC_ACL_NFS4: 520 case _PC_CAP_PRESENT: 521 case _PC_INF_PRESENT: 522 case _PC_MAC_PRESENT: 523 *ap->a_retval = 0; 524 return (0); 525 default: 526 return (EINVAL); 527 } 528 /* NOTREACHED */ 529 } 530 531 /* 532 * Standard lock, unlock and islocked functions. 533 */ 534 int 535 vop_stdlock(ap) 536 struct vop_lock1_args /* { 537 struct vnode *a_vp; 538 int a_flags; 539 char *file; 540 int line; 541 } */ *ap; 542 { 543 struct vnode *vp = ap->a_vp; 544 struct mtx *ilk; 545 546 ilk = VI_MTX(vp); 547 return (lockmgr_lock_flags(vp->v_vnlock, ap->a_flags, 548 &ilk->lock_object, ap->a_file, ap->a_line)); 549 } 550 551 /* See above. */ 552 int 553 vop_stdunlock(ap) 554 struct vop_unlock_args /* { 555 struct vnode *a_vp; 556 } */ *ap; 557 { 558 struct vnode *vp = ap->a_vp; 559 560 return (lockmgr_unlock(vp->v_vnlock)); 561 } 562 563 /* See above. */ 564 int 565 vop_stdislocked(ap) 566 struct vop_islocked_args /* { 567 struct vnode *a_vp; 568 } */ *ap; 569 { 570 571 return (lockstatus(ap->a_vp->v_vnlock)); 572 } 573 574 /* 575 * Variants of the above set. 576 * 577 * Differences are: 578 * - shared locking disablement is not supported 579 * - v_vnlock pointer is not honored 580 */ 581 int 582 vop_lock(ap) 583 struct vop_lock1_args /* { 584 struct vnode *a_vp; 585 int a_flags; 586 char *file; 587 int line; 588 } */ *ap; 589 { 590 struct vnode *vp = ap->a_vp; 591 int flags = ap->a_flags; 592 struct mtx *ilk; 593 594 MPASS(vp->v_vnlock == &vp->v_lock); 595 596 if (__predict_false((flags & ~(LK_TYPE_MASK | LK_NODDLKTREAT | LK_RETRY)) != 0)) 597 goto other; 598 599 switch (flags & LK_TYPE_MASK) { 600 case LK_SHARED: 601 return (lockmgr_slock(&vp->v_lock, flags, ap->a_file, ap->a_line)); 602 case LK_EXCLUSIVE: 603 return (lockmgr_xlock(&vp->v_lock, flags, ap->a_file, ap->a_line)); 604 } 605 other: 606 ilk = VI_MTX(vp); 607 return (lockmgr_lock_flags(&vp->v_lock, flags, 608 &ilk->lock_object, ap->a_file, ap->a_line)); 609 } 610 611 int 612 vop_unlock(ap) 613 struct vop_unlock_args /* { 614 struct vnode *a_vp; 615 } */ *ap; 616 { 617 struct vnode *vp = ap->a_vp; 618 619 MPASS(vp->v_vnlock == &vp->v_lock); 620 621 return (lockmgr_unlock(&vp->v_lock)); 622 } 623 624 int 625 vop_islocked(ap) 626 struct vop_islocked_args /* { 627 struct vnode *a_vp; 628 } */ *ap; 629 { 630 struct vnode *vp = ap->a_vp; 631 632 MPASS(vp->v_vnlock == &vp->v_lock); 633 634 return (lockstatus(&vp->v_lock)); 635 } 636 637 /* 638 * Return true for select/poll. 639 */ 640 int 641 vop_nopoll(ap) 642 struct vop_poll_args /* { 643 struct vnode *a_vp; 644 int a_events; 645 struct ucred *a_cred; 646 struct thread *a_td; 647 } */ *ap; 648 { 649 650 if (ap->a_events & ~POLLSTANDARD) 651 return (POLLNVAL); 652 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 653 } 654 655 /* 656 * Implement poll for local filesystems that support it. 657 */ 658 int 659 vop_stdpoll(ap) 660 struct vop_poll_args /* { 661 struct vnode *a_vp; 662 int a_events; 663 struct ucred *a_cred; 664 struct thread *a_td; 665 } */ *ap; 666 { 667 if (ap->a_events & ~POLLSTANDARD) 668 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events)); 669 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 670 } 671 672 /* 673 * Return our mount point, as we will take charge of the writes. 674 */ 675 int 676 vop_stdgetwritemount(ap) 677 struct vop_getwritemount_args /* { 678 struct vnode *a_vp; 679 struct mount **a_mpp; 680 } */ *ap; 681 { 682 struct mount *mp; 683 struct mount_pcpu *mpcpu; 684 struct vnode *vp; 685 686 /* 687 * Note that having a reference does not prevent forced unmount from 688 * setting ->v_mount to NULL after the lock gets released. This is of 689 * no consequence for typical consumers (most notably vn_start_write) 690 * since in this case the vnode is VIRF_DOOMED. Unmount might have 691 * progressed far enough that its completion is only delayed by the 692 * reference obtained here. The consumer only needs to concern itself 693 * with releasing it. 694 */ 695 vp = ap->a_vp; 696 mp = vp->v_mount; 697 if (mp == NULL) { 698 *(ap->a_mpp) = NULL; 699 return (0); 700 } 701 if (vfs_op_thread_enter(mp, mpcpu)) { 702 if (mp == vp->v_mount) { 703 vfs_mp_count_add_pcpu(mpcpu, ref, 1); 704 vfs_op_thread_exit(mp, mpcpu); 705 } else { 706 vfs_op_thread_exit(mp, mpcpu); 707 mp = NULL; 708 } 709 } else { 710 MNT_ILOCK(mp); 711 if (mp == vp->v_mount) { 712 MNT_REF(mp); 713 MNT_IUNLOCK(mp); 714 } else { 715 MNT_IUNLOCK(mp); 716 mp = NULL; 717 } 718 } 719 *(ap->a_mpp) = mp; 720 return (0); 721 } 722 723 /* 724 * If the file system doesn't implement VOP_BMAP, then return sensible defaults: 725 * - Return the vnode's bufobj instead of any underlying device's bufobj 726 * - Calculate the physical block number as if there were equal size 727 * consecutive blocks, but 728 * - Report no contiguous runs of blocks. 729 */ 730 int 731 vop_stdbmap(ap) 732 struct vop_bmap_args /* { 733 struct vnode *a_vp; 734 daddr_t a_bn; 735 struct bufobj **a_bop; 736 daddr_t *a_bnp; 737 int *a_runp; 738 int *a_runb; 739 } */ *ap; 740 { 741 742 if (ap->a_bop != NULL) 743 *ap->a_bop = &ap->a_vp->v_bufobj; 744 if (ap->a_bnp != NULL) 745 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize); 746 if (ap->a_runp != NULL) 747 *ap->a_runp = 0; 748 if (ap->a_runb != NULL) 749 *ap->a_runb = 0; 750 return (0); 751 } 752 753 int 754 vop_stdfsync(ap) 755 struct vop_fsync_args /* { 756 struct vnode *a_vp; 757 int a_waitfor; 758 struct thread *a_td; 759 } */ *ap; 760 { 761 762 return (vn_fsync_buf(ap->a_vp, ap->a_waitfor)); 763 } 764 765 static int 766 vop_stdfdatasync(struct vop_fdatasync_args *ap) 767 { 768 769 return (VOP_FSYNC(ap->a_vp, MNT_WAIT, ap->a_td)); 770 } 771 772 int 773 vop_stdfdatasync_buf(struct vop_fdatasync_args *ap) 774 { 775 776 return (vn_fsync_buf(ap->a_vp, MNT_WAIT)); 777 } 778 779 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */ 780 int 781 vop_stdgetpages(ap) 782 struct vop_getpages_args /* { 783 struct vnode *a_vp; 784 vm_page_t *a_m; 785 int a_count; 786 int *a_rbehind; 787 int *a_rahead; 788 } */ *ap; 789 { 790 791 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, 792 ap->a_count, ap->a_rbehind, ap->a_rahead, NULL, NULL); 793 } 794 795 static int 796 vop_stdgetpages_async(struct vop_getpages_async_args *ap) 797 { 798 int error; 799 800 error = VOP_GETPAGES(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind, 801 ap->a_rahead); 802 if (ap->a_iodone != NULL) 803 ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error); 804 return (error); 805 } 806 807 int 808 vop_stdkqfilter(struct vop_kqfilter_args *ap) 809 { 810 return vfs_kqfilter(ap); 811 } 812 813 /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */ 814 int 815 vop_stdputpages(ap) 816 struct vop_putpages_args /* { 817 struct vnode *a_vp; 818 vm_page_t *a_m; 819 int a_count; 820 int a_sync; 821 int *a_rtvals; 822 } */ *ap; 823 { 824 825 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 826 ap->a_sync, ap->a_rtvals); 827 } 828 829 int 830 vop_stdvptofh(struct vop_vptofh_args *ap) 831 { 832 return (EOPNOTSUPP); 833 } 834 835 int 836 vop_stdvptocnp(struct vop_vptocnp_args *ap) 837 { 838 struct vnode *vp = ap->a_vp; 839 struct vnode **dvp = ap->a_vpp; 840 struct ucred *cred; 841 char *buf = ap->a_buf; 842 size_t *buflen = ap->a_buflen; 843 char *dirbuf, *cpos; 844 int i, error, eofflag, dirbuflen, flags, locked, len, covered; 845 off_t off; 846 ino_t fileno; 847 struct vattr va; 848 struct nameidata nd; 849 struct thread *td; 850 struct dirent *dp; 851 struct vnode *mvp; 852 853 i = *buflen; 854 error = 0; 855 covered = 0; 856 td = curthread; 857 cred = td->td_ucred; 858 859 if (vp->v_type != VDIR) 860 return (ENOENT); 861 862 error = VOP_GETATTR(vp, &va, cred); 863 if (error) 864 return (error); 865 866 VREF(vp); 867 locked = VOP_ISLOCKED(vp); 868 VOP_UNLOCK(vp); 869 NDINIT_ATVP(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 870 "..", vp, td); 871 flags = FREAD; 872 error = vn_open_cred(&nd, &flags, 0, VN_OPEN_NOAUDIT, cred, NULL); 873 if (error) { 874 vn_lock(vp, locked | LK_RETRY); 875 return (error); 876 } 877 NDFREE(&nd, NDF_ONLY_PNBUF); 878 879 mvp = *dvp = nd.ni_vp; 880 881 if (vp->v_mount != (*dvp)->v_mount && 882 ((*dvp)->v_vflag & VV_ROOT) && 883 ((*dvp)->v_mount->mnt_flag & MNT_UNION)) { 884 *dvp = (*dvp)->v_mount->mnt_vnodecovered; 885 VREF(mvp); 886 VOP_UNLOCK(mvp); 887 vn_close(mvp, FREAD, cred, td); 888 VREF(*dvp); 889 vn_lock(*dvp, LK_SHARED | LK_RETRY); 890 covered = 1; 891 } 892 893 fileno = va.va_fileid; 894 895 dirbuflen = DEV_BSIZE; 896 if (dirbuflen < va.va_blocksize) 897 dirbuflen = va.va_blocksize; 898 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK); 899 900 if ((*dvp)->v_type != VDIR) { 901 error = ENOENT; 902 goto out; 903 } 904 905 off = 0; 906 len = 0; 907 do { 908 /* call VOP_READDIR of parent */ 909 error = get_next_dirent(*dvp, &dp, dirbuf, dirbuflen, &off, 910 &cpos, &len, &eofflag, td); 911 if (error) 912 goto out; 913 914 if ((dp->d_type != DT_WHT) && 915 (dp->d_fileno == fileno)) { 916 if (covered) { 917 VOP_UNLOCK(*dvp); 918 vn_lock(mvp, LK_SHARED | LK_RETRY); 919 if (dirent_exists(mvp, dp->d_name, td)) { 920 error = ENOENT; 921 VOP_UNLOCK(mvp); 922 vn_lock(*dvp, LK_SHARED | LK_RETRY); 923 goto out; 924 } 925 VOP_UNLOCK(mvp); 926 vn_lock(*dvp, LK_SHARED | LK_RETRY); 927 } 928 i -= dp->d_namlen; 929 930 if (i < 0) { 931 error = ENOMEM; 932 goto out; 933 } 934 if (dp->d_namlen == 1 && dp->d_name[0] == '.') { 935 error = ENOENT; 936 } else { 937 bcopy(dp->d_name, buf + i, dp->d_namlen); 938 error = 0; 939 } 940 goto out; 941 } 942 } while (len > 0 || !eofflag); 943 error = ENOENT; 944 945 out: 946 free(dirbuf, M_TEMP); 947 if (!error) { 948 *buflen = i; 949 vref(*dvp); 950 } 951 if (covered) { 952 vput(*dvp); 953 vrele(mvp); 954 } else { 955 VOP_UNLOCK(mvp); 956 vn_close(mvp, FREAD, cred, td); 957 } 958 vn_lock(vp, locked | LK_RETRY); 959 return (error); 960 } 961 962 int 963 vop_stdallocate(struct vop_allocate_args *ap) 964 { 965 #ifdef __notyet__ 966 struct statfs *sfs; 967 off_t maxfilesize = 0; 968 #endif 969 struct iovec aiov; 970 struct vattr vattr, *vap; 971 struct uio auio; 972 off_t fsize, len, cur, offset; 973 uint8_t *buf; 974 struct thread *td; 975 struct vnode *vp; 976 size_t iosize; 977 int error; 978 979 buf = NULL; 980 error = 0; 981 td = curthread; 982 vap = &vattr; 983 vp = ap->a_vp; 984 len = *ap->a_len; 985 offset = *ap->a_offset; 986 987 error = VOP_GETATTR(vp, vap, td->td_ucred); 988 if (error != 0) 989 goto out; 990 fsize = vap->va_size; 991 iosize = vap->va_blocksize; 992 if (iosize == 0) 993 iosize = BLKDEV_IOSIZE; 994 if (iosize > maxphys) 995 iosize = maxphys; 996 buf = malloc(iosize, M_TEMP, M_WAITOK); 997 998 #ifdef __notyet__ 999 /* 1000 * Check if the filesystem sets f_maxfilesize; if not use 1001 * VOP_SETATTR to perform the check. 1002 */ 1003 sfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 1004 error = VFS_STATFS(vp->v_mount, sfs, td); 1005 if (error == 0) 1006 maxfilesize = sfs->f_maxfilesize; 1007 free(sfs, M_STATFS); 1008 if (error != 0) 1009 goto out; 1010 if (maxfilesize) { 1011 if (offset > maxfilesize || len > maxfilesize || 1012 offset + len > maxfilesize) { 1013 error = EFBIG; 1014 goto out; 1015 } 1016 } else 1017 #endif 1018 if (offset + len > vap->va_size) { 1019 /* 1020 * Test offset + len against the filesystem's maxfilesize. 1021 */ 1022 VATTR_NULL(vap); 1023 vap->va_size = offset + len; 1024 error = VOP_SETATTR(vp, vap, td->td_ucred); 1025 if (error != 0) 1026 goto out; 1027 VATTR_NULL(vap); 1028 vap->va_size = fsize; 1029 error = VOP_SETATTR(vp, vap, td->td_ucred); 1030 if (error != 0) 1031 goto out; 1032 } 1033 1034 for (;;) { 1035 /* 1036 * Read and write back anything below the nominal file 1037 * size. There's currently no way outside the filesystem 1038 * to know whether this area is sparse or not. 1039 */ 1040 cur = iosize; 1041 if ((offset % iosize) != 0) 1042 cur -= (offset % iosize); 1043 if (cur > len) 1044 cur = len; 1045 if (offset < fsize) { 1046 aiov.iov_base = buf; 1047 aiov.iov_len = cur; 1048 auio.uio_iov = &aiov; 1049 auio.uio_iovcnt = 1; 1050 auio.uio_offset = offset; 1051 auio.uio_resid = cur; 1052 auio.uio_segflg = UIO_SYSSPACE; 1053 auio.uio_rw = UIO_READ; 1054 auio.uio_td = td; 1055 error = VOP_READ(vp, &auio, 0, td->td_ucred); 1056 if (error != 0) 1057 break; 1058 if (auio.uio_resid > 0) { 1059 bzero(buf + cur - auio.uio_resid, 1060 auio.uio_resid); 1061 } 1062 } else { 1063 bzero(buf, cur); 1064 } 1065 1066 aiov.iov_base = buf; 1067 aiov.iov_len = cur; 1068 auio.uio_iov = &aiov; 1069 auio.uio_iovcnt = 1; 1070 auio.uio_offset = offset; 1071 auio.uio_resid = cur; 1072 auio.uio_segflg = UIO_SYSSPACE; 1073 auio.uio_rw = UIO_WRITE; 1074 auio.uio_td = td; 1075 1076 error = VOP_WRITE(vp, &auio, 0, td->td_ucred); 1077 if (error != 0) 1078 break; 1079 1080 len -= cur; 1081 offset += cur; 1082 if (len == 0) 1083 break; 1084 if (should_yield()) 1085 break; 1086 } 1087 1088 out: 1089 *ap->a_len = len; 1090 *ap->a_offset = offset; 1091 free(buf, M_TEMP); 1092 return (error); 1093 } 1094 1095 int 1096 vop_stdadvise(struct vop_advise_args *ap) 1097 { 1098 struct vnode *vp; 1099 struct bufobj *bo; 1100 daddr_t startn, endn; 1101 off_t bstart, bend, start, end; 1102 int bsize, error; 1103 1104 vp = ap->a_vp; 1105 switch (ap->a_advice) { 1106 case POSIX_FADV_WILLNEED: 1107 /* 1108 * Do nothing for now. Filesystems should provide a 1109 * custom method which starts an asynchronous read of 1110 * the requested region. 1111 */ 1112 error = 0; 1113 break; 1114 case POSIX_FADV_DONTNEED: 1115 error = 0; 1116 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1117 if (VN_IS_DOOMED(vp)) { 1118 VOP_UNLOCK(vp); 1119 break; 1120 } 1121 1122 /* 1123 * Round to block boundaries (and later possibly further to 1124 * page boundaries). Applications cannot reasonably be aware 1125 * of the boundaries, and the rounding must be to expand at 1126 * both extremities to cover enough. It still doesn't cover 1127 * read-ahead. For partial blocks, this gives unnecessary 1128 * discarding of buffers but is efficient enough since the 1129 * pages usually remain in VMIO for some time. 1130 */ 1131 bsize = vp->v_bufobj.bo_bsize; 1132 bstart = rounddown(ap->a_start, bsize); 1133 bend = roundup(ap->a_end, bsize); 1134 1135 /* 1136 * Deactivate pages in the specified range from the backing VM 1137 * object. Pages that are resident in the buffer cache will 1138 * remain wired until their corresponding buffers are released 1139 * below. 1140 */ 1141 if (vp->v_object != NULL) { 1142 start = trunc_page(bstart); 1143 end = round_page(bend); 1144 VM_OBJECT_RLOCK(vp->v_object); 1145 vm_object_page_noreuse(vp->v_object, OFF_TO_IDX(start), 1146 OFF_TO_IDX(end)); 1147 VM_OBJECT_RUNLOCK(vp->v_object); 1148 } 1149 1150 bo = &vp->v_bufobj; 1151 BO_RLOCK(bo); 1152 startn = bstart / bsize; 1153 endn = bend / bsize; 1154 error = bnoreuselist(&bo->bo_clean, bo, startn, endn); 1155 if (error == 0) 1156 error = bnoreuselist(&bo->bo_dirty, bo, startn, endn); 1157 BO_RUNLOCK(bo); 1158 VOP_UNLOCK(vp); 1159 break; 1160 default: 1161 error = EINVAL; 1162 break; 1163 } 1164 return (error); 1165 } 1166 1167 int 1168 vop_stdunp_bind(struct vop_unp_bind_args *ap) 1169 { 1170 1171 ap->a_vp->v_unpcb = ap->a_unpcb; 1172 return (0); 1173 } 1174 1175 int 1176 vop_stdunp_connect(struct vop_unp_connect_args *ap) 1177 { 1178 1179 *ap->a_unpcb = ap->a_vp->v_unpcb; 1180 return (0); 1181 } 1182 1183 int 1184 vop_stdunp_detach(struct vop_unp_detach_args *ap) 1185 { 1186 1187 ap->a_vp->v_unpcb = NULL; 1188 return (0); 1189 } 1190 1191 static int 1192 vop_stdis_text(struct vop_is_text_args *ap) 1193 { 1194 1195 return (ap->a_vp->v_writecount < 0); 1196 } 1197 1198 int 1199 vop_stdset_text(struct vop_set_text_args *ap) 1200 { 1201 struct vnode *vp; 1202 struct mount *mp; 1203 int error; 1204 1205 vp = ap->a_vp; 1206 VI_LOCK(vp); 1207 if (vp->v_writecount > 0) { 1208 error = ETXTBSY; 1209 } else { 1210 /* 1211 * If requested by fs, keep a use reference to the 1212 * vnode until the last text reference is released. 1213 */ 1214 mp = vp->v_mount; 1215 if (mp != NULL && (mp->mnt_kern_flag & MNTK_TEXT_REFS) != 0 && 1216 vp->v_writecount == 0) { 1217 VNPASS((vp->v_iflag & VI_TEXT_REF) == 0, vp); 1218 vp->v_iflag |= VI_TEXT_REF; 1219 vrefl(vp); 1220 } 1221 1222 vp->v_writecount--; 1223 error = 0; 1224 } 1225 VI_UNLOCK(vp); 1226 return (error); 1227 } 1228 1229 static int 1230 vop_stdunset_text(struct vop_unset_text_args *ap) 1231 { 1232 struct vnode *vp; 1233 int error; 1234 bool last; 1235 1236 vp = ap->a_vp; 1237 last = false; 1238 VI_LOCK(vp); 1239 if (vp->v_writecount < 0) { 1240 if ((vp->v_iflag & VI_TEXT_REF) != 0 && 1241 vp->v_writecount == -1) { 1242 last = true; 1243 vp->v_iflag &= ~VI_TEXT_REF; 1244 } 1245 vp->v_writecount++; 1246 error = 0; 1247 } else { 1248 error = EINVAL; 1249 } 1250 VI_UNLOCK(vp); 1251 if (last) 1252 vunref(vp); 1253 return (error); 1254 } 1255 1256 static int 1257 vop_stdadd_writecount(struct vop_add_writecount_args *ap) 1258 { 1259 struct vnode *vp; 1260 struct mount *mp; 1261 int error; 1262 1263 vp = ap->a_vp; 1264 VI_LOCK_FLAGS(vp, MTX_DUPOK); 1265 if (vp->v_writecount < 0) { 1266 error = ETXTBSY; 1267 } else { 1268 VNASSERT(vp->v_writecount + ap->a_inc >= 0, vp, 1269 ("neg writecount increment %d", ap->a_inc)); 1270 if (vp->v_writecount == 0) { 1271 mp = vp->v_mount; 1272 if (mp != NULL && (mp->mnt_kern_flag & MNTK_NOMSYNC) == 0) 1273 vlazy(vp); 1274 } 1275 vp->v_writecount += ap->a_inc; 1276 error = 0; 1277 } 1278 VI_UNLOCK(vp); 1279 return (error); 1280 } 1281 1282 int 1283 vop_stdneed_inactive(struct vop_need_inactive_args *ap) 1284 { 1285 1286 return (1); 1287 } 1288 1289 int 1290 vop_stdioctl(struct vop_ioctl_args *ap) 1291 { 1292 struct vnode *vp; 1293 struct vattr va; 1294 off_t *offp; 1295 int error; 1296 1297 switch (ap->a_command) { 1298 case FIOSEEKDATA: 1299 case FIOSEEKHOLE: 1300 vp = ap->a_vp; 1301 error = vn_lock(vp, LK_SHARED); 1302 if (error != 0) 1303 return (EBADF); 1304 if (vp->v_type == VREG) 1305 error = VOP_GETATTR(vp, &va, ap->a_cred); 1306 else 1307 error = ENOTTY; 1308 if (error == 0) { 1309 offp = ap->a_data; 1310 if (*offp < 0 || *offp >= va.va_size) 1311 error = ENXIO; 1312 else if (ap->a_command == FIOSEEKHOLE) 1313 *offp = va.va_size; 1314 } 1315 VOP_UNLOCK(vp); 1316 break; 1317 default: 1318 error = ENOTTY; 1319 break; 1320 } 1321 return (error); 1322 } 1323 1324 /* 1325 * vfs default ops 1326 * used to fill the vfs function table to get reasonable default return values. 1327 */ 1328 int 1329 vfs_stdroot (mp, flags, vpp) 1330 struct mount *mp; 1331 int flags; 1332 struct vnode **vpp; 1333 { 1334 1335 return (EOPNOTSUPP); 1336 } 1337 1338 int 1339 vfs_stdstatfs (mp, sbp) 1340 struct mount *mp; 1341 struct statfs *sbp; 1342 { 1343 1344 return (EOPNOTSUPP); 1345 } 1346 1347 int 1348 vfs_stdquotactl (mp, cmds, uid, arg) 1349 struct mount *mp; 1350 int cmds; 1351 uid_t uid; 1352 void *arg; 1353 { 1354 1355 return (EOPNOTSUPP); 1356 } 1357 1358 int 1359 vfs_stdsync(mp, waitfor) 1360 struct mount *mp; 1361 int waitfor; 1362 { 1363 struct vnode *vp, *mvp; 1364 struct thread *td; 1365 int error, lockreq, allerror = 0; 1366 1367 td = curthread; 1368 lockreq = LK_EXCLUSIVE | LK_INTERLOCK; 1369 if (waitfor != MNT_WAIT) 1370 lockreq |= LK_NOWAIT; 1371 /* 1372 * Force stale buffer cache information to be flushed. 1373 */ 1374 loop: 1375 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1376 if (vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1377 VI_UNLOCK(vp); 1378 continue; 1379 } 1380 if ((error = vget(vp, lockreq)) != 0) { 1381 if (error == ENOENT) { 1382 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1383 goto loop; 1384 } 1385 continue; 1386 } 1387 error = VOP_FSYNC(vp, waitfor, td); 1388 if (error) 1389 allerror = error; 1390 vput(vp); 1391 } 1392 return (allerror); 1393 } 1394 1395 int 1396 vfs_stdnosync (mp, waitfor) 1397 struct mount *mp; 1398 int waitfor; 1399 { 1400 1401 return (0); 1402 } 1403 1404 static int 1405 vop_stdcopy_file_range(struct vop_copy_file_range_args *ap) 1406 { 1407 int error; 1408 1409 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, 1410 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred, 1411 ap->a_outcred, ap->a_fsizetd); 1412 return (error); 1413 } 1414 1415 int 1416 vfs_stdvget (mp, ino, flags, vpp) 1417 struct mount *mp; 1418 ino_t ino; 1419 int flags; 1420 struct vnode **vpp; 1421 { 1422 1423 return (EOPNOTSUPP); 1424 } 1425 1426 int 1427 vfs_stdfhtovp (mp, fhp, flags, vpp) 1428 struct mount *mp; 1429 struct fid *fhp; 1430 int flags; 1431 struct vnode **vpp; 1432 { 1433 1434 return (EOPNOTSUPP); 1435 } 1436 1437 int 1438 vfs_stdinit (vfsp) 1439 struct vfsconf *vfsp; 1440 { 1441 1442 return (0); 1443 } 1444 1445 int 1446 vfs_stduninit (vfsp) 1447 struct vfsconf *vfsp; 1448 { 1449 1450 return(0); 1451 } 1452 1453 int 1454 vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname) 1455 struct mount *mp; 1456 int cmd; 1457 struct vnode *filename_vp; 1458 int attrnamespace; 1459 const char *attrname; 1460 { 1461 1462 if (filename_vp != NULL) 1463 VOP_UNLOCK(filename_vp); 1464 return (EOPNOTSUPP); 1465 } 1466 1467 int 1468 vfs_stdsysctl(mp, op, req) 1469 struct mount *mp; 1470 fsctlop_t op; 1471 struct sysctl_req *req; 1472 { 1473 1474 return (EOPNOTSUPP); 1475 } 1476 1477 static vop_bypass_t * 1478 bp_by_off(struct vop_vector *vop, struct vop_generic_args *a) 1479 { 1480 1481 return (*(vop_bypass_t **)((char *)vop + a->a_desc->vdesc_vop_offset)); 1482 } 1483 1484 int 1485 vop_sigdefer(struct vop_vector *vop, struct vop_generic_args *a) 1486 { 1487 vop_bypass_t *bp; 1488 int prev_stops, rc; 1489 1490 bp = bp_by_off(vop, a); 1491 MPASS(bp != NULL); 1492 1493 prev_stops = sigdeferstop(SIGDEFERSTOP_SILENT); 1494 rc = bp(a); 1495 sigallowstop(prev_stops); 1496 return (rc); 1497 } 1498 1499 static int 1500 vop_stdstat(struct vop_stat_args *a) 1501 { 1502 struct vattr vattr; 1503 struct vattr *vap; 1504 struct vnode *vp; 1505 struct stat *sb; 1506 int error; 1507 u_short mode; 1508 1509 vp = a->a_vp; 1510 sb = a->a_sb; 1511 1512 error = vop_stat_helper_pre(a); 1513 if (error != 0) 1514 return (error); 1515 1516 vap = &vattr; 1517 1518 /* 1519 * Initialize defaults for new and unusual fields, so that file 1520 * systems which don't support these fields don't need to know 1521 * about them. 1522 */ 1523 vap->va_birthtime.tv_sec = -1; 1524 vap->va_birthtime.tv_nsec = 0; 1525 vap->va_fsid = VNOVAL; 1526 vap->va_rdev = NODEV; 1527 1528 error = VOP_GETATTR(vp, vap, a->a_active_cred); 1529 if (error) 1530 goto out; 1531 1532 /* 1533 * Zero the spare stat fields 1534 */ 1535 bzero(sb, sizeof *sb); 1536 1537 /* 1538 * Copy from vattr table 1539 */ 1540 if (vap->va_fsid != VNOVAL) 1541 sb->st_dev = vap->va_fsid; 1542 else 1543 sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0]; 1544 sb->st_ino = vap->va_fileid; 1545 mode = vap->va_mode; 1546 switch (vap->va_type) { 1547 case VREG: 1548 mode |= S_IFREG; 1549 break; 1550 case VDIR: 1551 mode |= S_IFDIR; 1552 break; 1553 case VBLK: 1554 mode |= S_IFBLK; 1555 break; 1556 case VCHR: 1557 mode |= S_IFCHR; 1558 break; 1559 case VLNK: 1560 mode |= S_IFLNK; 1561 break; 1562 case VSOCK: 1563 mode |= S_IFSOCK; 1564 break; 1565 case VFIFO: 1566 mode |= S_IFIFO; 1567 break; 1568 default: 1569 error = EBADF; 1570 goto out; 1571 } 1572 sb->st_mode = mode; 1573 sb->st_nlink = vap->va_nlink; 1574 sb->st_uid = vap->va_uid; 1575 sb->st_gid = vap->va_gid; 1576 sb->st_rdev = vap->va_rdev; 1577 if (vap->va_size > OFF_MAX) { 1578 error = EOVERFLOW; 1579 goto out; 1580 } 1581 sb->st_size = vap->va_size; 1582 sb->st_atim.tv_sec = vap->va_atime.tv_sec; 1583 sb->st_atim.tv_nsec = vap->va_atime.tv_nsec; 1584 sb->st_mtim.tv_sec = vap->va_mtime.tv_sec; 1585 sb->st_mtim.tv_nsec = vap->va_mtime.tv_nsec; 1586 sb->st_ctim.tv_sec = vap->va_ctime.tv_sec; 1587 sb->st_ctim.tv_nsec = vap->va_ctime.tv_nsec; 1588 sb->st_birthtim.tv_sec = vap->va_birthtime.tv_sec; 1589 sb->st_birthtim.tv_nsec = vap->va_birthtime.tv_nsec; 1590 1591 /* 1592 * According to www.opengroup.org, the meaning of st_blksize is 1593 * "a filesystem-specific preferred I/O block size for this 1594 * object. In some filesystem types, this may vary from file 1595 * to file" 1596 * Use minimum/default of PAGE_SIZE (e.g. for VCHR). 1597 */ 1598 1599 sb->st_blksize = max(PAGE_SIZE, vap->va_blocksize); 1600 sb->st_flags = vap->va_flags; 1601 sb->st_blocks = vap->va_bytes / S_BLKSIZE; 1602 sb->st_gen = vap->va_gen; 1603 out: 1604 return (vop_stat_helper_post(a, error)); 1605 } 1606 1607 static int 1608 vop_stdread_pgcache(struct vop_read_pgcache_args *ap __unused) 1609 { 1610 return (EJUSTRETURN); 1611 } 1612 1613 static int 1614 vop_stdvput_pair(struct vop_vput_pair_args *ap) 1615 { 1616 struct vnode *dvp, *vp, **vpp; 1617 1618 dvp = ap->a_dvp; 1619 vpp = ap->a_vpp; 1620 vput(dvp); 1621 if (vpp != NULL && ap->a_unlock_vp && (vp = *vpp) != NULL) 1622 vput(vp); 1623 return (0); 1624 } 1625