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 vattr vattr; 427 int error; 428 429 vp = ap->a_vp; 430 if (ap->a_fl->l_whence == SEEK_END) { 431 /* 432 * The NFSv4 server must avoid doing a vn_lock() here, since it 433 * can deadlock the nfsd threads, due to a LOR. Fortunately 434 * the NFSv4 server always uses SEEK_SET and this code is 435 * only required for the SEEK_END case. 436 */ 437 vn_lock(vp, LK_SHARED | LK_RETRY); 438 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 439 VOP_UNLOCK(vp); 440 if (error) 441 return (error); 442 } else 443 vattr.va_size = 0; 444 445 return (lf_advlock(ap, &(vp->v_lockf), vattr.va_size)); 446 } 447 448 int 449 vop_stdadvlockasync(struct vop_advlockasync_args *ap) 450 { 451 struct vnode *vp; 452 struct vattr vattr; 453 int error; 454 455 vp = ap->a_vp; 456 if (ap->a_fl->l_whence == SEEK_END) { 457 /* The size argument is only needed for SEEK_END. */ 458 vn_lock(vp, LK_SHARED | LK_RETRY); 459 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 460 VOP_UNLOCK(vp); 461 if (error) 462 return (error); 463 } else 464 vattr.va_size = 0; 465 466 return (lf_advlockasync(ap, &(vp->v_lockf), vattr.va_size)); 467 } 468 469 int 470 vop_stdadvlockpurge(struct vop_advlockpurge_args *ap) 471 { 472 struct vnode *vp; 473 474 vp = ap->a_vp; 475 lf_purgelocks(vp, &vp->v_lockf); 476 return (0); 477 } 478 479 /* 480 * vop_stdpathconf: 481 * 482 * Standard implementation of POSIX pathconf, to get information about limits 483 * for a filesystem. 484 * Override per filesystem for the case where the filesystem has smaller 485 * limits. 486 */ 487 int 488 vop_stdpathconf(ap) 489 struct vop_pathconf_args /* { 490 struct vnode *a_vp; 491 int a_name; 492 int *a_retval; 493 } */ *ap; 494 { 495 496 switch (ap->a_name) { 497 case _PC_ASYNC_IO: 498 *ap->a_retval = _POSIX_ASYNCHRONOUS_IO; 499 return (0); 500 case _PC_PATH_MAX: 501 *ap->a_retval = PATH_MAX; 502 return (0); 503 case _PC_ACL_EXTENDED: 504 case _PC_ACL_NFS4: 505 case _PC_CAP_PRESENT: 506 case _PC_INF_PRESENT: 507 case _PC_MAC_PRESENT: 508 *ap->a_retval = 0; 509 return (0); 510 default: 511 return (EINVAL); 512 } 513 /* NOTREACHED */ 514 } 515 516 /* 517 * Standard lock, unlock and islocked functions. 518 */ 519 int 520 vop_stdlock(ap) 521 struct vop_lock1_args /* { 522 struct vnode *a_vp; 523 int a_flags; 524 char *file; 525 int line; 526 } */ *ap; 527 { 528 struct vnode *vp = ap->a_vp; 529 struct mtx *ilk; 530 531 ilk = VI_MTX(vp); 532 return (lockmgr_lock_flags(vp->v_vnlock, ap->a_flags, 533 &ilk->lock_object, ap->a_file, ap->a_line)); 534 } 535 536 /* See above. */ 537 int 538 vop_stdunlock(ap) 539 struct vop_unlock_args /* { 540 struct vnode *a_vp; 541 } */ *ap; 542 { 543 struct vnode *vp = ap->a_vp; 544 545 return (lockmgr_unlock(vp->v_vnlock)); 546 } 547 548 /* See above. */ 549 int 550 vop_stdislocked(ap) 551 struct vop_islocked_args /* { 552 struct vnode *a_vp; 553 } */ *ap; 554 { 555 556 return (lockstatus(ap->a_vp->v_vnlock)); 557 } 558 559 /* 560 * Variants of the above set. 561 * 562 * Differences are: 563 * - shared locking disablement is not supported 564 * - v_vnlock pointer is not honored 565 */ 566 int 567 vop_lock(ap) 568 struct vop_lock1_args /* { 569 struct vnode *a_vp; 570 int a_flags; 571 char *file; 572 int line; 573 } */ *ap; 574 { 575 struct vnode *vp = ap->a_vp; 576 int flags = ap->a_flags; 577 struct mtx *ilk; 578 579 MPASS(vp->v_vnlock == &vp->v_lock); 580 581 if (__predict_false((flags & ~(LK_TYPE_MASK | LK_NODDLKTREAT | LK_RETRY)) != 0)) 582 goto other; 583 584 switch (flags & LK_TYPE_MASK) { 585 case LK_SHARED: 586 return (lockmgr_slock(&vp->v_lock, flags, ap->a_file, ap->a_line)); 587 case LK_EXCLUSIVE: 588 return (lockmgr_xlock(&vp->v_lock, flags, ap->a_file, ap->a_line)); 589 } 590 other: 591 ilk = VI_MTX(vp); 592 return (lockmgr_lock_flags(&vp->v_lock, flags, 593 &ilk->lock_object, ap->a_file, ap->a_line)); 594 } 595 596 int 597 vop_unlock(ap) 598 struct vop_unlock_args /* { 599 struct vnode *a_vp; 600 } */ *ap; 601 { 602 struct vnode *vp = ap->a_vp; 603 604 MPASS(vp->v_vnlock == &vp->v_lock); 605 606 return (lockmgr_unlock(&vp->v_lock)); 607 } 608 609 int 610 vop_islocked(ap) 611 struct vop_islocked_args /* { 612 struct vnode *a_vp; 613 } */ *ap; 614 { 615 struct vnode *vp = ap->a_vp; 616 617 MPASS(vp->v_vnlock == &vp->v_lock); 618 619 return (lockstatus(&vp->v_lock)); 620 } 621 622 /* 623 * Return true for select/poll. 624 */ 625 int 626 vop_nopoll(ap) 627 struct vop_poll_args /* { 628 struct vnode *a_vp; 629 int a_events; 630 struct ucred *a_cred; 631 struct thread *a_td; 632 } */ *ap; 633 { 634 635 if (ap->a_events & ~POLLSTANDARD) 636 return (POLLNVAL); 637 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 638 } 639 640 /* 641 * Implement poll for local filesystems that support it. 642 */ 643 int 644 vop_stdpoll(ap) 645 struct vop_poll_args /* { 646 struct vnode *a_vp; 647 int a_events; 648 struct ucred *a_cred; 649 struct thread *a_td; 650 } */ *ap; 651 { 652 if (ap->a_events & ~POLLSTANDARD) 653 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events)); 654 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 655 } 656 657 /* 658 * Return our mount point, as we will take charge of the writes. 659 */ 660 int 661 vop_stdgetwritemount(ap) 662 struct vop_getwritemount_args /* { 663 struct vnode *a_vp; 664 struct mount **a_mpp; 665 } */ *ap; 666 { 667 struct mount *mp; 668 struct mount_pcpu *mpcpu; 669 struct vnode *vp; 670 671 /* 672 * Note that having a reference does not prevent forced unmount from 673 * setting ->v_mount to NULL after the lock gets released. This is of 674 * no consequence for typical consumers (most notably vn_start_write) 675 * since in this case the vnode is VIRF_DOOMED. Unmount might have 676 * progressed far enough that its completion is only delayed by the 677 * reference obtained here. The consumer only needs to concern itself 678 * with releasing it. 679 */ 680 vp = ap->a_vp; 681 mp = vp->v_mount; 682 if (mp == NULL) { 683 *(ap->a_mpp) = NULL; 684 return (0); 685 } 686 if (vfs_op_thread_enter(mp, mpcpu)) { 687 if (mp == vp->v_mount) { 688 vfs_mp_count_add_pcpu(mpcpu, ref, 1); 689 vfs_op_thread_exit(mp, mpcpu); 690 } else { 691 vfs_op_thread_exit(mp, mpcpu); 692 mp = NULL; 693 } 694 } else { 695 MNT_ILOCK(mp); 696 if (mp == vp->v_mount) { 697 MNT_REF(mp); 698 MNT_IUNLOCK(mp); 699 } else { 700 MNT_IUNLOCK(mp); 701 mp = NULL; 702 } 703 } 704 *(ap->a_mpp) = mp; 705 return (0); 706 } 707 708 /* 709 * If the file system doesn't implement VOP_BMAP, then return sensible defaults: 710 * - Return the vnode's bufobj instead of any underlying device's bufobj 711 * - Calculate the physical block number as if there were equal size 712 * consecutive blocks, but 713 * - Report no contiguous runs of blocks. 714 */ 715 int 716 vop_stdbmap(ap) 717 struct vop_bmap_args /* { 718 struct vnode *a_vp; 719 daddr_t a_bn; 720 struct bufobj **a_bop; 721 daddr_t *a_bnp; 722 int *a_runp; 723 int *a_runb; 724 } */ *ap; 725 { 726 727 if (ap->a_bop != NULL) 728 *ap->a_bop = &ap->a_vp->v_bufobj; 729 if (ap->a_bnp != NULL) 730 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize); 731 if (ap->a_runp != NULL) 732 *ap->a_runp = 0; 733 if (ap->a_runb != NULL) 734 *ap->a_runb = 0; 735 return (0); 736 } 737 738 int 739 vop_stdfsync(ap) 740 struct vop_fsync_args /* { 741 struct vnode *a_vp; 742 int a_waitfor; 743 struct thread *a_td; 744 } */ *ap; 745 { 746 747 return (vn_fsync_buf(ap->a_vp, ap->a_waitfor)); 748 } 749 750 static int 751 vop_stdfdatasync(struct vop_fdatasync_args *ap) 752 { 753 754 return (VOP_FSYNC(ap->a_vp, MNT_WAIT, ap->a_td)); 755 } 756 757 int 758 vop_stdfdatasync_buf(struct vop_fdatasync_args *ap) 759 { 760 761 return (vn_fsync_buf(ap->a_vp, MNT_WAIT)); 762 } 763 764 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */ 765 int 766 vop_stdgetpages(ap) 767 struct vop_getpages_args /* { 768 struct vnode *a_vp; 769 vm_page_t *a_m; 770 int a_count; 771 int *a_rbehind; 772 int *a_rahead; 773 } */ *ap; 774 { 775 776 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, 777 ap->a_count, ap->a_rbehind, ap->a_rahead, NULL, NULL); 778 } 779 780 static int 781 vop_stdgetpages_async(struct vop_getpages_async_args *ap) 782 { 783 int error; 784 785 error = VOP_GETPAGES(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind, 786 ap->a_rahead); 787 if (ap->a_iodone != NULL) 788 ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error); 789 return (error); 790 } 791 792 int 793 vop_stdkqfilter(struct vop_kqfilter_args *ap) 794 { 795 return vfs_kqfilter(ap); 796 } 797 798 /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */ 799 int 800 vop_stdputpages(ap) 801 struct vop_putpages_args /* { 802 struct vnode *a_vp; 803 vm_page_t *a_m; 804 int a_count; 805 int a_sync; 806 int *a_rtvals; 807 } */ *ap; 808 { 809 810 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 811 ap->a_sync, ap->a_rtvals); 812 } 813 814 int 815 vop_stdvptofh(struct vop_vptofh_args *ap) 816 { 817 return (EOPNOTSUPP); 818 } 819 820 int 821 vop_stdvptocnp(struct vop_vptocnp_args *ap) 822 { 823 struct vnode *vp = ap->a_vp; 824 struct vnode **dvp = ap->a_vpp; 825 struct ucred *cred; 826 char *buf = ap->a_buf; 827 size_t *buflen = ap->a_buflen; 828 char *dirbuf, *cpos; 829 int i, error, eofflag, dirbuflen, flags, locked, len, covered; 830 off_t off; 831 ino_t fileno; 832 struct vattr va; 833 struct nameidata nd; 834 struct thread *td; 835 struct dirent *dp; 836 struct vnode *mvp; 837 838 i = *buflen; 839 error = 0; 840 covered = 0; 841 td = curthread; 842 cred = td->td_ucred; 843 844 if (vp->v_type != VDIR) 845 return (ENOENT); 846 847 error = VOP_GETATTR(vp, &va, cred); 848 if (error) 849 return (error); 850 851 VREF(vp); 852 locked = VOP_ISLOCKED(vp); 853 VOP_UNLOCK(vp); 854 NDINIT_ATVP(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 855 "..", vp, td); 856 flags = FREAD; 857 error = vn_open_cred(&nd, &flags, 0, VN_OPEN_NOAUDIT, cred, NULL); 858 if (error) { 859 vn_lock(vp, locked | LK_RETRY); 860 return (error); 861 } 862 NDFREE(&nd, NDF_ONLY_PNBUF); 863 864 mvp = *dvp = nd.ni_vp; 865 866 if (vp->v_mount != (*dvp)->v_mount && 867 ((*dvp)->v_vflag & VV_ROOT) && 868 ((*dvp)->v_mount->mnt_flag & MNT_UNION)) { 869 *dvp = (*dvp)->v_mount->mnt_vnodecovered; 870 VREF(mvp); 871 VOP_UNLOCK(mvp); 872 vn_close(mvp, FREAD, cred, td); 873 VREF(*dvp); 874 vn_lock(*dvp, LK_SHARED | LK_RETRY); 875 covered = 1; 876 } 877 878 fileno = va.va_fileid; 879 880 dirbuflen = DEV_BSIZE; 881 if (dirbuflen < va.va_blocksize) 882 dirbuflen = va.va_blocksize; 883 dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK); 884 885 if ((*dvp)->v_type != VDIR) { 886 error = ENOENT; 887 goto out; 888 } 889 890 off = 0; 891 len = 0; 892 do { 893 /* call VOP_READDIR of parent */ 894 error = get_next_dirent(*dvp, &dp, dirbuf, dirbuflen, &off, 895 &cpos, &len, &eofflag, td); 896 if (error) 897 goto out; 898 899 if ((dp->d_type != DT_WHT) && 900 (dp->d_fileno == fileno)) { 901 if (covered) { 902 VOP_UNLOCK(*dvp); 903 vn_lock(mvp, LK_SHARED | LK_RETRY); 904 if (dirent_exists(mvp, dp->d_name, td)) { 905 error = ENOENT; 906 VOP_UNLOCK(mvp); 907 vn_lock(*dvp, LK_SHARED | LK_RETRY); 908 goto out; 909 } 910 VOP_UNLOCK(mvp); 911 vn_lock(*dvp, LK_SHARED | LK_RETRY); 912 } 913 i -= dp->d_namlen; 914 915 if (i < 0) { 916 error = ENOMEM; 917 goto out; 918 } 919 if (dp->d_namlen == 1 && dp->d_name[0] == '.') { 920 error = ENOENT; 921 } else { 922 bcopy(dp->d_name, buf + i, dp->d_namlen); 923 error = 0; 924 } 925 goto out; 926 } 927 } while (len > 0 || !eofflag); 928 error = ENOENT; 929 930 out: 931 free(dirbuf, M_TEMP); 932 if (!error) { 933 *buflen = i; 934 vref(*dvp); 935 } 936 if (covered) { 937 vput(*dvp); 938 vrele(mvp); 939 } else { 940 VOP_UNLOCK(mvp); 941 vn_close(mvp, FREAD, cred, td); 942 } 943 vn_lock(vp, locked | LK_RETRY); 944 return (error); 945 } 946 947 int 948 vop_stdallocate(struct vop_allocate_args *ap) 949 { 950 #ifdef __notyet__ 951 struct statfs *sfs; 952 off_t maxfilesize = 0; 953 #endif 954 struct iovec aiov; 955 struct vattr vattr, *vap; 956 struct uio auio; 957 off_t fsize, len, cur, offset; 958 uint8_t *buf; 959 struct thread *td; 960 struct vnode *vp; 961 size_t iosize; 962 int error; 963 964 buf = NULL; 965 error = 0; 966 td = curthread; 967 vap = &vattr; 968 vp = ap->a_vp; 969 len = *ap->a_len; 970 offset = *ap->a_offset; 971 972 error = VOP_GETATTR(vp, vap, td->td_ucred); 973 if (error != 0) 974 goto out; 975 fsize = vap->va_size; 976 iosize = vap->va_blocksize; 977 if (iosize == 0) 978 iosize = BLKDEV_IOSIZE; 979 if (iosize > maxphys) 980 iosize = maxphys; 981 buf = malloc(iosize, M_TEMP, M_WAITOK); 982 983 #ifdef __notyet__ 984 /* 985 * Check if the filesystem sets f_maxfilesize; if not use 986 * VOP_SETATTR to perform the check. 987 */ 988 sfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 989 error = VFS_STATFS(vp->v_mount, sfs, td); 990 if (error == 0) 991 maxfilesize = sfs->f_maxfilesize; 992 free(sfs, M_STATFS); 993 if (error != 0) 994 goto out; 995 if (maxfilesize) { 996 if (offset > maxfilesize || len > maxfilesize || 997 offset + len > maxfilesize) { 998 error = EFBIG; 999 goto out; 1000 } 1001 } else 1002 #endif 1003 if (offset + len > vap->va_size) { 1004 /* 1005 * Test offset + len against the filesystem's maxfilesize. 1006 */ 1007 VATTR_NULL(vap); 1008 vap->va_size = offset + len; 1009 error = VOP_SETATTR(vp, vap, td->td_ucred); 1010 if (error != 0) 1011 goto out; 1012 VATTR_NULL(vap); 1013 vap->va_size = fsize; 1014 error = VOP_SETATTR(vp, vap, td->td_ucred); 1015 if (error != 0) 1016 goto out; 1017 } 1018 1019 for (;;) { 1020 /* 1021 * Read and write back anything below the nominal file 1022 * size. There's currently no way outside the filesystem 1023 * to know whether this area is sparse or not. 1024 */ 1025 cur = iosize; 1026 if ((offset % iosize) != 0) 1027 cur -= (offset % iosize); 1028 if (cur > len) 1029 cur = len; 1030 if (offset < fsize) { 1031 aiov.iov_base = buf; 1032 aiov.iov_len = cur; 1033 auio.uio_iov = &aiov; 1034 auio.uio_iovcnt = 1; 1035 auio.uio_offset = offset; 1036 auio.uio_resid = cur; 1037 auio.uio_segflg = UIO_SYSSPACE; 1038 auio.uio_rw = UIO_READ; 1039 auio.uio_td = td; 1040 error = VOP_READ(vp, &auio, 0, td->td_ucred); 1041 if (error != 0) 1042 break; 1043 if (auio.uio_resid > 0) { 1044 bzero(buf + cur - auio.uio_resid, 1045 auio.uio_resid); 1046 } 1047 } else { 1048 bzero(buf, cur); 1049 } 1050 1051 aiov.iov_base = buf; 1052 aiov.iov_len = cur; 1053 auio.uio_iov = &aiov; 1054 auio.uio_iovcnt = 1; 1055 auio.uio_offset = offset; 1056 auio.uio_resid = cur; 1057 auio.uio_segflg = UIO_SYSSPACE; 1058 auio.uio_rw = UIO_WRITE; 1059 auio.uio_td = td; 1060 1061 error = VOP_WRITE(vp, &auio, 0, td->td_ucred); 1062 if (error != 0) 1063 break; 1064 1065 len -= cur; 1066 offset += cur; 1067 if (len == 0) 1068 break; 1069 if (should_yield()) 1070 break; 1071 } 1072 1073 out: 1074 *ap->a_len = len; 1075 *ap->a_offset = offset; 1076 free(buf, M_TEMP); 1077 return (error); 1078 } 1079 1080 int 1081 vop_stdadvise(struct vop_advise_args *ap) 1082 { 1083 struct vnode *vp; 1084 struct bufobj *bo; 1085 daddr_t startn, endn; 1086 off_t bstart, bend, start, end; 1087 int bsize, error; 1088 1089 vp = ap->a_vp; 1090 switch (ap->a_advice) { 1091 case POSIX_FADV_WILLNEED: 1092 /* 1093 * Do nothing for now. Filesystems should provide a 1094 * custom method which starts an asynchronous read of 1095 * the requested region. 1096 */ 1097 error = 0; 1098 break; 1099 case POSIX_FADV_DONTNEED: 1100 error = 0; 1101 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1102 if (VN_IS_DOOMED(vp)) { 1103 VOP_UNLOCK(vp); 1104 break; 1105 } 1106 1107 /* 1108 * Round to block boundaries (and later possibly further to 1109 * page boundaries). Applications cannot reasonably be aware 1110 * of the boundaries, and the rounding must be to expand at 1111 * both extremities to cover enough. It still doesn't cover 1112 * read-ahead. For partial blocks, this gives unnecessary 1113 * discarding of buffers but is efficient enough since the 1114 * pages usually remain in VMIO for some time. 1115 */ 1116 bsize = vp->v_bufobj.bo_bsize; 1117 bstart = rounddown(ap->a_start, bsize); 1118 bend = roundup(ap->a_end, bsize); 1119 1120 /* 1121 * Deactivate pages in the specified range from the backing VM 1122 * object. Pages that are resident in the buffer cache will 1123 * remain wired until their corresponding buffers are released 1124 * below. 1125 */ 1126 if (vp->v_object != NULL) { 1127 start = trunc_page(bstart); 1128 end = round_page(bend); 1129 VM_OBJECT_RLOCK(vp->v_object); 1130 vm_object_page_noreuse(vp->v_object, OFF_TO_IDX(start), 1131 OFF_TO_IDX(end)); 1132 VM_OBJECT_RUNLOCK(vp->v_object); 1133 } 1134 1135 bo = &vp->v_bufobj; 1136 BO_RLOCK(bo); 1137 startn = bstart / bsize; 1138 endn = bend / bsize; 1139 error = bnoreuselist(&bo->bo_clean, bo, startn, endn); 1140 if (error == 0) 1141 error = bnoreuselist(&bo->bo_dirty, bo, startn, endn); 1142 BO_RUNLOCK(bo); 1143 VOP_UNLOCK(vp); 1144 break; 1145 default: 1146 error = EINVAL; 1147 break; 1148 } 1149 return (error); 1150 } 1151 1152 int 1153 vop_stdunp_bind(struct vop_unp_bind_args *ap) 1154 { 1155 1156 ap->a_vp->v_unpcb = ap->a_unpcb; 1157 return (0); 1158 } 1159 1160 int 1161 vop_stdunp_connect(struct vop_unp_connect_args *ap) 1162 { 1163 1164 *ap->a_unpcb = ap->a_vp->v_unpcb; 1165 return (0); 1166 } 1167 1168 int 1169 vop_stdunp_detach(struct vop_unp_detach_args *ap) 1170 { 1171 1172 ap->a_vp->v_unpcb = NULL; 1173 return (0); 1174 } 1175 1176 static int 1177 vop_stdis_text(struct vop_is_text_args *ap) 1178 { 1179 1180 return (ap->a_vp->v_writecount < 0); 1181 } 1182 1183 int 1184 vop_stdset_text(struct vop_set_text_args *ap) 1185 { 1186 struct vnode *vp; 1187 struct mount *mp; 1188 int error; 1189 1190 vp = ap->a_vp; 1191 VI_LOCK(vp); 1192 if (vp->v_writecount > 0) { 1193 error = ETXTBSY; 1194 } else { 1195 /* 1196 * If requested by fs, keep a use reference to the 1197 * vnode until the last text reference is released. 1198 */ 1199 mp = vp->v_mount; 1200 if (mp != NULL && (mp->mnt_kern_flag & MNTK_TEXT_REFS) != 0 && 1201 vp->v_writecount == 0) { 1202 VNPASS((vp->v_iflag & VI_TEXT_REF) == 0, vp); 1203 vp->v_iflag |= VI_TEXT_REF; 1204 vrefl(vp); 1205 } 1206 1207 vp->v_writecount--; 1208 error = 0; 1209 } 1210 VI_UNLOCK(vp); 1211 return (error); 1212 } 1213 1214 static int 1215 vop_stdunset_text(struct vop_unset_text_args *ap) 1216 { 1217 struct vnode *vp; 1218 int error; 1219 bool last; 1220 1221 vp = ap->a_vp; 1222 last = false; 1223 VI_LOCK(vp); 1224 if (vp->v_writecount < 0) { 1225 if ((vp->v_iflag & VI_TEXT_REF) != 0 && 1226 vp->v_writecount == -1) { 1227 last = true; 1228 vp->v_iflag &= ~VI_TEXT_REF; 1229 } 1230 vp->v_writecount++; 1231 error = 0; 1232 } else { 1233 error = EINVAL; 1234 } 1235 VI_UNLOCK(vp); 1236 if (last) 1237 vunref(vp); 1238 return (error); 1239 } 1240 1241 static int 1242 vop_stdadd_writecount(struct vop_add_writecount_args *ap) 1243 { 1244 struct vnode *vp; 1245 struct mount *mp; 1246 int error; 1247 1248 vp = ap->a_vp; 1249 VI_LOCK_FLAGS(vp, MTX_DUPOK); 1250 if (vp->v_writecount < 0) { 1251 error = ETXTBSY; 1252 } else { 1253 VNASSERT(vp->v_writecount + ap->a_inc >= 0, vp, 1254 ("neg writecount increment %d", ap->a_inc)); 1255 if (vp->v_writecount == 0) { 1256 mp = vp->v_mount; 1257 if (mp != NULL && (mp->mnt_kern_flag & MNTK_NOMSYNC) == 0) 1258 vlazy(vp); 1259 } 1260 vp->v_writecount += ap->a_inc; 1261 error = 0; 1262 } 1263 VI_UNLOCK(vp); 1264 return (error); 1265 } 1266 1267 int 1268 vop_stdneed_inactive(struct vop_need_inactive_args *ap) 1269 { 1270 1271 return (1); 1272 } 1273 1274 int 1275 vop_stdioctl(struct vop_ioctl_args *ap) 1276 { 1277 struct vnode *vp; 1278 struct vattr va; 1279 off_t *offp; 1280 int error; 1281 1282 switch (ap->a_command) { 1283 case FIOSEEKDATA: 1284 case FIOSEEKHOLE: 1285 vp = ap->a_vp; 1286 error = vn_lock(vp, LK_SHARED); 1287 if (error != 0) 1288 return (EBADF); 1289 if (vp->v_type == VREG) 1290 error = VOP_GETATTR(vp, &va, ap->a_cred); 1291 else 1292 error = ENOTTY; 1293 if (error == 0) { 1294 offp = ap->a_data; 1295 if (*offp < 0 || *offp >= va.va_size) 1296 error = ENXIO; 1297 else if (ap->a_command == FIOSEEKHOLE) 1298 *offp = va.va_size; 1299 } 1300 VOP_UNLOCK(vp); 1301 break; 1302 default: 1303 error = ENOTTY; 1304 break; 1305 } 1306 return (error); 1307 } 1308 1309 /* 1310 * vfs default ops 1311 * used to fill the vfs function table to get reasonable default return values. 1312 */ 1313 int 1314 vfs_stdroot (mp, flags, vpp) 1315 struct mount *mp; 1316 int flags; 1317 struct vnode **vpp; 1318 { 1319 1320 return (EOPNOTSUPP); 1321 } 1322 1323 int 1324 vfs_stdstatfs (mp, sbp) 1325 struct mount *mp; 1326 struct statfs *sbp; 1327 { 1328 1329 return (EOPNOTSUPP); 1330 } 1331 1332 int 1333 vfs_stdquotactl (mp, cmds, uid, arg) 1334 struct mount *mp; 1335 int cmds; 1336 uid_t uid; 1337 void *arg; 1338 { 1339 1340 return (EOPNOTSUPP); 1341 } 1342 1343 int 1344 vfs_stdsync(mp, waitfor) 1345 struct mount *mp; 1346 int waitfor; 1347 { 1348 struct vnode *vp, *mvp; 1349 struct thread *td; 1350 int error, lockreq, allerror = 0; 1351 1352 td = curthread; 1353 lockreq = LK_EXCLUSIVE | LK_INTERLOCK; 1354 if (waitfor != MNT_WAIT) 1355 lockreq |= LK_NOWAIT; 1356 /* 1357 * Force stale buffer cache information to be flushed. 1358 */ 1359 loop: 1360 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { 1361 if (vp->v_bufobj.bo_dirty.bv_cnt == 0) { 1362 VI_UNLOCK(vp); 1363 continue; 1364 } 1365 if ((error = vget(vp, lockreq)) != 0) { 1366 if (error == ENOENT) { 1367 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); 1368 goto loop; 1369 } 1370 continue; 1371 } 1372 error = VOP_FSYNC(vp, waitfor, td); 1373 if (error) 1374 allerror = error; 1375 vput(vp); 1376 } 1377 return (allerror); 1378 } 1379 1380 int 1381 vfs_stdnosync (mp, waitfor) 1382 struct mount *mp; 1383 int waitfor; 1384 { 1385 1386 return (0); 1387 } 1388 1389 static int 1390 vop_stdcopy_file_range(struct vop_copy_file_range_args *ap) 1391 { 1392 int error; 1393 1394 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, 1395 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred, 1396 ap->a_outcred, ap->a_fsizetd); 1397 return (error); 1398 } 1399 1400 int 1401 vfs_stdvget (mp, ino, flags, vpp) 1402 struct mount *mp; 1403 ino_t ino; 1404 int flags; 1405 struct vnode **vpp; 1406 { 1407 1408 return (EOPNOTSUPP); 1409 } 1410 1411 int 1412 vfs_stdfhtovp (mp, fhp, flags, vpp) 1413 struct mount *mp; 1414 struct fid *fhp; 1415 int flags; 1416 struct vnode **vpp; 1417 { 1418 1419 return (EOPNOTSUPP); 1420 } 1421 1422 int 1423 vfs_stdinit (vfsp) 1424 struct vfsconf *vfsp; 1425 { 1426 1427 return (0); 1428 } 1429 1430 int 1431 vfs_stduninit (vfsp) 1432 struct vfsconf *vfsp; 1433 { 1434 1435 return(0); 1436 } 1437 1438 int 1439 vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname) 1440 struct mount *mp; 1441 int cmd; 1442 struct vnode *filename_vp; 1443 int attrnamespace; 1444 const char *attrname; 1445 { 1446 1447 if (filename_vp != NULL) 1448 VOP_UNLOCK(filename_vp); 1449 return (EOPNOTSUPP); 1450 } 1451 1452 int 1453 vfs_stdsysctl(mp, op, req) 1454 struct mount *mp; 1455 fsctlop_t op; 1456 struct sysctl_req *req; 1457 { 1458 1459 return (EOPNOTSUPP); 1460 } 1461 1462 static vop_bypass_t * 1463 bp_by_off(struct vop_vector *vop, struct vop_generic_args *a) 1464 { 1465 1466 return (*(vop_bypass_t **)((char *)vop + a->a_desc->vdesc_vop_offset)); 1467 } 1468 1469 int 1470 vop_sigdefer(struct vop_vector *vop, struct vop_generic_args *a) 1471 { 1472 vop_bypass_t *bp; 1473 int prev_stops, rc; 1474 1475 bp = bp_by_off(vop, a); 1476 MPASS(bp != NULL); 1477 1478 prev_stops = sigdeferstop(SIGDEFERSTOP_SILENT); 1479 rc = bp(a); 1480 sigallowstop(prev_stops); 1481 return (rc); 1482 } 1483 1484 static int 1485 vop_stdstat(struct vop_stat_args *a) 1486 { 1487 struct vattr vattr; 1488 struct vattr *vap; 1489 struct vnode *vp; 1490 struct stat *sb; 1491 int error; 1492 u_short mode; 1493 1494 vp = a->a_vp; 1495 sb = a->a_sb; 1496 1497 error = vop_stat_helper_pre(a); 1498 if (error != 0) 1499 return (error); 1500 1501 vap = &vattr; 1502 1503 /* 1504 * Initialize defaults for new and unusual fields, so that file 1505 * systems which don't support these fields don't need to know 1506 * about them. 1507 */ 1508 vap->va_birthtime.tv_sec = -1; 1509 vap->va_birthtime.tv_nsec = 0; 1510 vap->va_fsid = VNOVAL; 1511 vap->va_rdev = NODEV; 1512 1513 error = VOP_GETATTR(vp, vap, a->a_active_cred); 1514 if (error) 1515 goto out; 1516 1517 /* 1518 * Zero the spare stat fields 1519 */ 1520 bzero(sb, sizeof *sb); 1521 1522 /* 1523 * Copy from vattr table 1524 */ 1525 if (vap->va_fsid != VNOVAL) 1526 sb->st_dev = vap->va_fsid; 1527 else 1528 sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0]; 1529 sb->st_ino = vap->va_fileid; 1530 mode = vap->va_mode; 1531 switch (vap->va_type) { 1532 case VREG: 1533 mode |= S_IFREG; 1534 break; 1535 case VDIR: 1536 mode |= S_IFDIR; 1537 break; 1538 case VBLK: 1539 mode |= S_IFBLK; 1540 break; 1541 case VCHR: 1542 mode |= S_IFCHR; 1543 break; 1544 case VLNK: 1545 mode |= S_IFLNK; 1546 break; 1547 case VSOCK: 1548 mode |= S_IFSOCK; 1549 break; 1550 case VFIFO: 1551 mode |= S_IFIFO; 1552 break; 1553 default: 1554 error = EBADF; 1555 goto out; 1556 } 1557 sb->st_mode = mode; 1558 sb->st_nlink = vap->va_nlink; 1559 sb->st_uid = vap->va_uid; 1560 sb->st_gid = vap->va_gid; 1561 sb->st_rdev = vap->va_rdev; 1562 if (vap->va_size > OFF_MAX) { 1563 error = EOVERFLOW; 1564 goto out; 1565 } 1566 sb->st_size = vap->va_size; 1567 sb->st_atim.tv_sec = vap->va_atime.tv_sec; 1568 sb->st_atim.tv_nsec = vap->va_atime.tv_nsec; 1569 sb->st_mtim.tv_sec = vap->va_mtime.tv_sec; 1570 sb->st_mtim.tv_nsec = vap->va_mtime.tv_nsec; 1571 sb->st_ctim.tv_sec = vap->va_ctime.tv_sec; 1572 sb->st_ctim.tv_nsec = vap->va_ctime.tv_nsec; 1573 sb->st_birthtim.tv_sec = vap->va_birthtime.tv_sec; 1574 sb->st_birthtim.tv_nsec = vap->va_birthtime.tv_nsec; 1575 1576 /* 1577 * According to www.opengroup.org, the meaning of st_blksize is 1578 * "a filesystem-specific preferred I/O block size for this 1579 * object. In some filesystem types, this may vary from file 1580 * to file" 1581 * Use minimum/default of PAGE_SIZE (e.g. for VCHR). 1582 */ 1583 1584 sb->st_blksize = max(PAGE_SIZE, vap->va_blocksize); 1585 sb->st_flags = vap->va_flags; 1586 sb->st_blocks = vap->va_bytes / S_BLKSIZE; 1587 sb->st_gen = vap->va_gen; 1588 out: 1589 return (vop_stat_helper_post(a, error)); 1590 } 1591 1592 static int 1593 vop_stdread_pgcache(struct vop_read_pgcache_args *ap __unused) 1594 { 1595 return (EJUSTRETURN); 1596 } 1597 1598 static int 1599 vop_stdvput_pair(struct vop_vput_pair_args *ap) 1600 { 1601 struct vnode *dvp, *vp, **vpp; 1602 1603 dvp = ap->a_dvp; 1604 vpp = ap->a_vpp; 1605 vput(dvp); 1606 if (vpp != NULL && ap->a_unlock_vp && (vp = *vpp) != NULL) 1607 vput(vp); 1608 return (0); 1609 } 1610