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