1 /* $NetBSD: tmpfs_vnops.c,v 1.141 2020/05/19 22:22:15 ad Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007, 2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 9 * 2005 program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * tmpfs vnode interface. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: tmpfs_vnops.c,v 1.141 2020/05/19 22:22:15 ad Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/dirent.h> 42 #include <sys/fcntl.h> 43 #include <sys/event.h> 44 #include <sys/malloc.h> 45 #include <sys/namei.h> 46 #include <sys/stat.h> 47 #include <sys/uio.h> 48 #include <sys/unistd.h> 49 #include <sys/vnode.h> 50 #include <sys/lockf.h> 51 #include <sys/kauth.h> 52 #include <sys/atomic.h> 53 54 #include <uvm/uvm.h> 55 56 #include <miscfs/fifofs/fifo.h> 57 #include <miscfs/genfs/genfs.h> 58 #include <fs/tmpfs/tmpfs_vnops.h> 59 #include <fs/tmpfs/tmpfs.h> 60 61 /* 62 * vnode operations vector used for files stored in a tmpfs file system. 63 */ 64 int (**tmpfs_vnodeop_p)(void *); 65 const struct vnodeopv_entry_desc tmpfs_vnodeop_entries[] = { 66 { &vop_default_desc, vn_default_error }, 67 { &vop_lookup_desc, tmpfs_lookup }, 68 { &vop_create_desc, tmpfs_create }, 69 { &vop_mknod_desc, tmpfs_mknod }, 70 { &vop_open_desc, tmpfs_open }, 71 { &vop_close_desc, tmpfs_close }, 72 { &vop_access_desc, tmpfs_access }, 73 { &vop_accessx_desc, genfs_accessx }, 74 { &vop_getattr_desc, tmpfs_getattr }, 75 { &vop_setattr_desc, tmpfs_setattr }, 76 { &vop_read_desc, tmpfs_read }, 77 { &vop_write_desc, tmpfs_write }, 78 { &vop_fallocate_desc, genfs_eopnotsupp }, 79 { &vop_fdiscard_desc, genfs_eopnotsupp }, 80 { &vop_ioctl_desc, tmpfs_ioctl }, 81 { &vop_fcntl_desc, tmpfs_fcntl }, 82 { &vop_poll_desc, tmpfs_poll }, 83 { &vop_kqfilter_desc, tmpfs_kqfilter }, 84 { &vop_revoke_desc, tmpfs_revoke }, 85 { &vop_mmap_desc, tmpfs_mmap }, 86 { &vop_fsync_desc, tmpfs_fsync }, 87 { &vop_seek_desc, tmpfs_seek }, 88 { &vop_remove_desc, tmpfs_remove }, 89 { &vop_link_desc, tmpfs_link }, 90 { &vop_rename_desc, tmpfs_rename }, 91 { &vop_mkdir_desc, tmpfs_mkdir }, 92 { &vop_rmdir_desc, tmpfs_rmdir }, 93 { &vop_symlink_desc, tmpfs_symlink }, 94 { &vop_readdir_desc, tmpfs_readdir }, 95 { &vop_readlink_desc, tmpfs_readlink }, 96 { &vop_abortop_desc, tmpfs_abortop }, 97 { &vop_inactive_desc, tmpfs_inactive }, 98 { &vop_reclaim_desc, tmpfs_reclaim }, 99 { &vop_lock_desc, tmpfs_lock }, 100 { &vop_unlock_desc, tmpfs_unlock }, 101 { &vop_bmap_desc, tmpfs_bmap }, 102 { &vop_strategy_desc, tmpfs_strategy }, 103 { &vop_print_desc, tmpfs_print }, 104 { &vop_pathconf_desc, tmpfs_pathconf }, 105 { &vop_islocked_desc, tmpfs_islocked }, 106 { &vop_advlock_desc, tmpfs_advlock }, 107 { &vop_bwrite_desc, tmpfs_bwrite }, 108 { &vop_getpages_desc, tmpfs_getpages }, 109 { &vop_putpages_desc, tmpfs_putpages }, 110 { &vop_whiteout_desc, tmpfs_whiteout }, 111 { NULL, NULL } 112 }; 113 114 const struct vnodeopv_desc tmpfs_vnodeop_opv_desc = { 115 &tmpfs_vnodeop_p, tmpfs_vnodeop_entries 116 }; 117 118 /* 119 * tmpfs_lookup: path name traversal routine. 120 * 121 * Arguments: dvp (directory being searched), vpp (result), 122 * cnp (component name - path). 123 * 124 * => Caller holds a reference and lock on dvp. 125 * => We return looked-up vnode (vpp) locked, with a reference held. 126 */ 127 int 128 tmpfs_lookup(void *v) 129 { 130 struct vop_lookup_v2_args /* { 131 struct vnode *a_dvp; 132 struct vnode **a_vpp; 133 struct componentname *a_cnp; 134 } */ *ap = v; 135 vnode_t *dvp = ap->a_dvp, **vpp = ap->a_vpp; 136 struct componentname *cnp = ap->a_cnp; 137 const bool lastcn = (cnp->cn_flags & ISLASTCN) != 0; 138 tmpfs_node_t *dnode, *tnode; 139 tmpfs_dirent_t *de; 140 int cachefound, iswhiteout; 141 int error; 142 143 KASSERT(VOP_ISLOCKED(dvp)); 144 145 dnode = VP_TO_TMPFS_DIR(dvp); 146 *vpp = NULL; 147 148 /* Check accessibility of directory. */ 149 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 150 if (error) { 151 goto out; 152 } 153 154 /* 155 * If requesting the last path component on a read-only file system 156 * with a write operation, deny it. 157 */ 158 if (lastcn && (dvp->v_mount->mnt_flag & MNT_RDONLY) != 0 && 159 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 160 error = EROFS; 161 goto out; 162 } 163 164 /* 165 * Avoid doing a linear scan of the directory if the requested 166 * directory/name couple is already in the cache. 167 */ 168 cachefound = cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 169 cnp->cn_nameiop, cnp->cn_flags, 170 &iswhiteout, vpp); 171 if (iswhiteout) { 172 cnp->cn_flags |= ISWHITEOUT; 173 } 174 if (cachefound && *vpp == NULLVP) { 175 /* Negative cache hit. */ 176 error = ENOENT; 177 goto out; 178 } else if (cachefound) { 179 error = 0; 180 goto out; 181 } 182 183 /* 184 * Treat an unlinked directory as empty (no "." or "..") 185 */ 186 if (dnode->tn_links == 0) { 187 KASSERT(dnode->tn_size == 0); 188 error = ENOENT; 189 goto out; 190 } 191 192 if (cnp->cn_flags & ISDOTDOT) { 193 tmpfs_node_t *pnode; 194 195 /* 196 * Lookup of ".." case. 197 */ 198 if (lastcn && cnp->cn_nameiop == RENAME) { 199 error = EINVAL; 200 goto out; 201 } 202 KASSERT(dnode->tn_type == VDIR); 203 pnode = dnode->tn_spec.tn_dir.tn_parent; 204 if (pnode == NULL) { 205 error = ENOENT; 206 goto done; 207 } 208 209 error = vcache_get(dvp->v_mount, &pnode, sizeof(pnode), vpp); 210 goto done; 211 } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 212 /* 213 * Lookup of "." case. 214 */ 215 if (lastcn && cnp->cn_nameiop == RENAME) { 216 error = EISDIR; 217 goto out; 218 } 219 vref(dvp); 220 *vpp = dvp; 221 error = 0; 222 goto done; 223 } 224 225 /* 226 * Other lookup cases: perform directory scan. 227 */ 228 de = tmpfs_dir_lookup(dnode, cnp); 229 if (de == NULL || de->td_node == TMPFS_NODE_WHITEOUT) { 230 /* 231 * The entry was not found in the directory. This is valid 232 * if we are creating or renaming an entry and are working 233 * on the last component of the path name. 234 */ 235 if (lastcn && (cnp->cn_nameiop == CREATE || 236 cnp->cn_nameiop == RENAME)) { 237 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 238 if (error) { 239 goto out; 240 } 241 error = EJUSTRETURN; 242 } else { 243 error = ENOENT; 244 } 245 if (de) { 246 KASSERT(de->td_node == TMPFS_NODE_WHITEOUT); 247 cnp->cn_flags |= ISWHITEOUT; 248 } 249 goto done; 250 } 251 252 tnode = de->td_node; 253 254 /* 255 * If it is not the last path component and found a non-directory 256 * or non-link entry (which may itself be pointing to a directory), 257 * raise an error. 258 */ 259 if (!lastcn && tnode->tn_type != VDIR && tnode->tn_type != VLNK) { 260 error = ENOTDIR; 261 goto out; 262 } 263 264 /* Check the permissions. */ 265 if (lastcn && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 266 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 267 if (error) 268 goto out; 269 270 if ((dnode->tn_mode & S_ISTXT) != 0) { 271 error = kauth_authorize_vnode(cnp->cn_cred, 272 KAUTH_VNODE_DELETE, tnode->tn_vnode, 273 dnode->tn_vnode, genfs_can_sticky(dvp, cnp->cn_cred, 274 dnode->tn_uid, tnode->tn_uid)); 275 if (error) { 276 error = EPERM; 277 goto out; 278 } 279 } 280 } 281 282 /* Get a vnode for the matching entry. */ 283 error = vcache_get(dvp->v_mount, &tnode, sizeof(tnode), vpp); 284 done: 285 /* 286 * Cache the result, unless request was for creation (as it does 287 * not improve the performance). 288 */ 289 if (cnp->cn_nameiop != CREATE) { 290 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 291 cnp->cn_flags); 292 } 293 out: 294 KASSERT(VOP_ISLOCKED(dvp)); 295 296 return error; 297 } 298 299 int 300 tmpfs_create(void *v) 301 { 302 struct vop_create_v3_args /* { 303 struct vnode *a_dvp; 304 struct vnode **a_vpp; 305 struct componentname *a_cnp; 306 struct vattr *a_vap; 307 } */ *ap = v; 308 vnode_t *dvp = ap->a_dvp, **vpp = ap->a_vpp; 309 struct componentname *cnp = ap->a_cnp; 310 struct vattr *vap = ap->a_vap; 311 312 KASSERT(VOP_ISLOCKED(dvp)); 313 KASSERT(vap->va_type == VREG || vap->va_type == VSOCK); 314 return tmpfs_construct_node(dvp, vpp, vap, cnp, NULL); 315 } 316 317 int 318 tmpfs_mknod(void *v) 319 { 320 struct vop_mknod_v3_args /* { 321 struct vnode *a_dvp; 322 struct vnode **a_vpp; 323 struct componentname *a_cnp; 324 struct vattr *a_vap; 325 } */ *ap = v; 326 vnode_t *dvp = ap->a_dvp, **vpp = ap->a_vpp; 327 struct componentname *cnp = ap->a_cnp; 328 struct vattr *vap = ap->a_vap; 329 enum vtype vt = vap->va_type; 330 331 if (vt != VBLK && vt != VCHR && vt != VFIFO) { 332 *vpp = NULL; 333 return EINVAL; 334 } 335 return tmpfs_construct_node(dvp, vpp, vap, cnp, NULL); 336 } 337 338 int 339 tmpfs_open(void *v) 340 { 341 struct vop_open_args /* { 342 struct vnode *a_vp; 343 int a_mode; 344 kauth_cred_t a_cred; 345 } */ *ap = v; 346 vnode_t *vp = ap->a_vp; 347 mode_t mode = ap->a_mode; 348 tmpfs_node_t *node; 349 350 KASSERT(VOP_ISLOCKED(vp)); 351 352 node = VP_TO_TMPFS_NODE(vp); 353 354 /* If the file is marked append-only, deny write requests. */ 355 if ((node->tn_flags & APPEND) != 0 && 356 (mode & (FWRITE | O_APPEND)) == FWRITE) { 357 return EPERM; 358 } 359 return 0; 360 } 361 362 int 363 tmpfs_close(void *v) 364 { 365 struct vop_close_args /* { 366 struct vnode *a_vp; 367 int a_fflag; 368 kauth_cred_t a_cred; 369 } */ *ap = v; 370 vnode_t *vp __diagused = ap->a_vp; 371 372 KASSERT(VOP_ISLOCKED(vp)); 373 return 0; 374 } 375 376 int 377 tmpfs_access(void *v) 378 { 379 struct vop_access_args /* { 380 struct vnode *a_vp; 381 accmode_t a_accmode; 382 kauth_cred_t a_cred; 383 } */ *ap = v; 384 vnode_t *vp = ap->a_vp; 385 accmode_t accmode = ap->a_accmode; 386 kauth_cred_t cred = ap->a_cred; 387 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 388 const bool writing = (accmode & VWRITE) != 0; 389 390 KASSERT(VOP_ISLOCKED(vp)); 391 392 /* Possible? */ 393 switch (vp->v_type) { 394 case VDIR: 395 case VLNK: 396 case VREG: 397 if (writing && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) { 398 return EROFS; 399 } 400 break; 401 case VBLK: 402 case VCHR: 403 case VSOCK: 404 case VFIFO: 405 break; 406 default: 407 return EINVAL; 408 } 409 if (writing && (node->tn_flags & IMMUTABLE) != 0) { 410 return EPERM; 411 } 412 413 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 414 vp->v_type, node->tn_mode), vp, NULL, genfs_can_access(vp, cred, 415 node->tn_uid, node->tn_gid, node->tn_mode, NULL, accmode)); 416 } 417 418 int 419 tmpfs_getattr(void *v) 420 { 421 struct vop_getattr_args /* { 422 struct vnode *a_vp; 423 struct vattr *a_vap; 424 kauth_cred_t a_cred; 425 } */ *ap = v; 426 vnode_t *vp = ap->a_vp; 427 struct vattr *vap = ap->a_vap; 428 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 429 430 vattr_null(vap); 431 432 vap->va_type = vp->v_type; 433 vap->va_mode = node->tn_mode; 434 vap->va_nlink = node->tn_links; 435 vap->va_uid = node->tn_uid; 436 vap->va_gid = node->tn_gid; 437 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 438 vap->va_fileid = node->tn_id; 439 vap->va_size = node->tn_size; 440 vap->va_blocksize = PAGE_SIZE; 441 vap->va_gen = TMPFS_NODE_GEN(node); 442 vap->va_flags = node->tn_flags; 443 vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 444 node->tn_spec.tn_dev.tn_rdev : VNOVAL; 445 vap->va_bytes = round_page(node->tn_size); 446 vap->va_filerev = VNOVAL; 447 vap->va_vaflags = 0; 448 vap->va_spare = VNOVAL; /* XXX */ 449 450 mutex_enter(&node->tn_timelock); 451 tmpfs_update_locked(vp, 0); 452 vap->va_atime = node->tn_atime; 453 vap->va_mtime = node->tn_mtime; 454 vap->va_ctime = node->tn_ctime; 455 vap->va_birthtime = node->tn_birthtime; 456 mutex_exit(&node->tn_timelock); 457 458 return 0; 459 } 460 461 int 462 tmpfs_setattr(void *v) 463 { 464 struct vop_setattr_args /* { 465 struct vnode *a_vp; 466 struct vattr *a_vap; 467 kauth_cred_t a_cred; 468 } */ *ap = v; 469 vnode_t *vp = ap->a_vp; 470 struct vattr *vap = ap->a_vap; 471 kauth_cred_t cred = ap->a_cred; 472 lwp_t *l = curlwp; 473 int error = 0; 474 475 KASSERT(VOP_ISLOCKED(vp)); 476 477 /* Abort if any unsettable attribute is given. */ 478 if (vap->va_type != VNON || vap->va_nlink != VNOVAL || 479 vap->va_fsid != VNOVAL || vap->va_fileid != VNOVAL || 480 vap->va_blocksize != VNOVAL || vap->va_ctime.tv_sec != VNOVAL || 481 vap->va_gen != VNOVAL || vap->va_rdev != VNOVAL || 482 vap->va_bytes != VNOVAL) { 483 return EINVAL; 484 } 485 486 if (error == 0 && vap->va_flags != VNOVAL) 487 error = tmpfs_chflags(vp, vap->va_flags, cred, l); 488 489 if (error == 0 && vap->va_size != VNOVAL) 490 error = tmpfs_chsize(vp, vap->va_size, cred, l); 491 492 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 493 error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, l); 494 495 if (error == 0 && vap->va_mode != VNOVAL) 496 error = tmpfs_chmod(vp, vap->va_mode, cred, l); 497 498 const bool chsometime = 499 vap->va_atime.tv_sec != VNOVAL || 500 vap->va_mtime.tv_sec != VNOVAL || 501 vap->va_birthtime.tv_sec != VNOVAL; 502 if (error == 0 && chsometime) { 503 error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 504 &vap->va_birthtime, vap->va_vaflags, cred, l); 505 } 506 return error; 507 } 508 509 int 510 tmpfs_read(void *v) 511 { 512 struct vop_read_args /* { 513 struct vnode *a_vp; 514 struct uio *a_uio; 515 int a_ioflag; 516 kauth_cred_t a_cred; 517 } */ *ap = v; 518 vnode_t *vp = ap->a_vp; 519 struct uio *uio = ap->a_uio; 520 const int ioflag = ap->a_ioflag; 521 tmpfs_node_t *node; 522 struct uvm_object *uobj; 523 int error; 524 525 KASSERT(VOP_ISLOCKED(vp)); 526 527 if (vp->v_type == VDIR) { 528 return EISDIR; 529 } 530 if (uio->uio_offset < 0 || vp->v_type != VREG) { 531 return EINVAL; 532 } 533 534 /* Note: reading zero bytes should not update atime. */ 535 if (uio->uio_resid == 0) { 536 return 0; 537 } 538 539 node = VP_TO_TMPFS_NODE(vp); 540 uobj = node->tn_spec.tn_reg.tn_aobj; 541 error = 0; 542 543 while (error == 0 && uio->uio_resid > 0) { 544 vsize_t len; 545 546 if (node->tn_size <= uio->uio_offset) { 547 break; 548 } 549 len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); 550 if (len == 0) { 551 break; 552 } 553 error = ubc_uiomove(uobj, uio, len, IO_ADV_DECODE(ioflag), 554 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 555 } 556 557 tmpfs_update(vp, TMPFS_UPDATE_ATIME); 558 return error; 559 } 560 561 int 562 tmpfs_write(void *v) 563 { 564 struct vop_write_args /* { 565 struct vnode *a_vp; 566 struct uio *a_uio; 567 int a_ioflag; 568 kauth_cred_t a_cred; 569 } */ *ap = v; 570 vnode_t *vp = ap->a_vp; 571 struct uio *uio = ap->a_uio; 572 const int ioflag = ap->a_ioflag; 573 tmpfs_node_t *node; 574 struct uvm_object *uobj; 575 off_t oldsize; 576 int error; 577 578 KASSERT(VOP_ISLOCKED(vp)); 579 580 node = VP_TO_TMPFS_NODE(vp); 581 oldsize = node->tn_size; 582 583 if ((vp->v_mount->mnt_flag & MNT_RDONLY) != 0) { 584 error = EROFS; 585 goto out; 586 } 587 588 if (uio->uio_offset < 0 || vp->v_type != VREG) { 589 error = EINVAL; 590 goto out; 591 } 592 if (uio->uio_resid == 0) { 593 error = 0; 594 goto out; 595 } 596 if (ioflag & IO_APPEND) { 597 uio->uio_offset = node->tn_size; 598 } 599 600 if (uio->uio_offset + uio->uio_resid > node->tn_size) { 601 error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 602 if (error) 603 goto out; 604 } 605 606 uobj = node->tn_spec.tn_reg.tn_aobj; 607 error = 0; 608 while (error == 0 && uio->uio_resid > 0) { 609 vsize_t len; 610 611 len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); 612 if (len == 0) { 613 break; 614 } 615 error = ubc_uiomove(uobj, uio, len, IO_ADV_DECODE(ioflag), 616 UBC_WRITE | UBC_VNODE_FLAGS(vp)); 617 } 618 if (error) { 619 (void)tmpfs_reg_resize(vp, oldsize); 620 } 621 622 tmpfs_update(vp, TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME); 623 VN_KNOTE(vp, NOTE_WRITE); 624 out: 625 if (error) { 626 KASSERT(oldsize == node->tn_size); 627 } else { 628 KASSERT(uio->uio_resid == 0); 629 } 630 return error; 631 } 632 633 int 634 tmpfs_fsync(void *v) 635 { 636 struct vop_fsync_args /* { 637 struct vnode *a_vp; 638 kauth_cred_t a_cred; 639 int a_flags; 640 off_t a_offlo; 641 off_t a_offhi; 642 struct lwp *a_l; 643 } */ *ap = v; 644 vnode_t *vp __diagused = ap->a_vp; 645 646 /* Nothing to do. Should be up to date. */ 647 KASSERT(VOP_ISLOCKED(vp)); 648 return 0; 649 } 650 651 /* 652 * tmpfs_remove: unlink a file. 653 * 654 * => Both directory (dvp) and file (vp) are locked. 655 * => We unlock and drop the reference on both. 656 */ 657 int 658 tmpfs_remove(void *v) 659 { 660 struct vop_remove_v2_args /* { 661 struct vnode *a_dvp; 662 struct vnode *a_vp; 663 struct componentname *a_cnp; 664 } */ *ap = v; 665 vnode_t *dvp = ap->a_dvp, *vp = ap->a_vp; 666 tmpfs_node_t *dnode, *node; 667 tmpfs_dirent_t *de; 668 int error, tflags; 669 670 KASSERT(VOP_ISLOCKED(dvp)); 671 KASSERT(VOP_ISLOCKED(vp)); 672 673 if (vp->v_type == VDIR) { 674 error = EPERM; 675 goto out; 676 } 677 dnode = VP_TO_TMPFS_DIR(dvp); 678 node = VP_TO_TMPFS_NODE(vp); 679 680 /* 681 * Files marked as immutable or append-only cannot be deleted. 682 * Likewise, files residing on directories marked as append-only 683 * cannot be deleted. 684 */ 685 if (node->tn_flags & (IMMUTABLE | APPEND)) { 686 error = EPERM; 687 goto out; 688 } 689 if (dnode->tn_flags & APPEND) { 690 error = EPERM; 691 goto out; 692 } 693 694 /* Lookup the directory entry (check the cached hint first). */ 695 de = tmpfs_dir_cached(node); 696 if (de == NULL) { 697 struct componentname *cnp = ap->a_cnp; 698 de = tmpfs_dir_lookup(dnode, cnp); 699 } 700 KASSERT(de && de->td_node == node); 701 702 /* 703 * Remove the entry from the directory (drops the link count) and 704 * destroy it or replace with a whiteout. 705 * 706 * Note: the inode referred by it will not be destroyed until the 707 * vnode is reclaimed/recycled. 708 */ 709 710 tmpfs_dir_detach(dnode, de); 711 712 if (ap->a_cnp->cn_flags & DOWHITEOUT) 713 tmpfs_dir_attach(dnode, de, TMPFS_NODE_WHITEOUT); 714 else 715 tmpfs_free_dirent(VFS_TO_TMPFS(vp->v_mount), de); 716 717 tflags = TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME; 718 if (node->tn_links > 0) { 719 /* We removed a hard link. */ 720 tflags |= TMPFS_UPDATE_CTIME; 721 } 722 tmpfs_update(dvp, tflags); 723 error = 0; 724 out: 725 /* Drop the reference and unlock the node. */ 726 if (dvp == vp) { 727 vrele(vp); 728 } else { 729 vput(vp); 730 } 731 return error; 732 } 733 734 /* 735 * tmpfs_link: create a hard link. 736 */ 737 int 738 tmpfs_link(void *v) 739 { 740 struct vop_link_v2_args /* { 741 struct vnode *a_dvp; 742 struct vnode *a_vp; 743 struct componentname *a_cnp; 744 } */ *ap = v; 745 vnode_t *dvp = ap->a_dvp; 746 vnode_t *vp = ap->a_vp; 747 struct componentname *cnp = ap->a_cnp; 748 tmpfs_node_t *dnode, *node; 749 tmpfs_dirent_t *de; 750 int error; 751 752 KASSERT(dvp != vp); 753 KASSERT(VOP_ISLOCKED(dvp)); 754 KASSERT(vp->v_type != VDIR); 755 KASSERT(dvp->v_mount == vp->v_mount); 756 757 dnode = VP_TO_TMPFS_DIR(dvp); 758 node = VP_TO_TMPFS_NODE(vp); 759 760 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 761 762 /* Check for maximum number of links limit. */ 763 if (node->tn_links == LINK_MAX) { 764 error = EMLINK; 765 goto out; 766 } 767 KASSERT(node->tn_links < LINK_MAX); 768 769 /* We cannot create links of files marked immutable or append-only. */ 770 if (node->tn_flags & (IMMUTABLE | APPEND)) { 771 error = EPERM; 772 goto out; 773 } 774 775 /* Allocate a new directory entry to represent the inode. */ 776 error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), 777 cnp->cn_nameptr, cnp->cn_namelen, &de); 778 if (error) { 779 goto out; 780 } 781 782 /* 783 * Insert the entry into the directory. 784 * It will increase the inode link count. 785 */ 786 tmpfs_dir_attach(dnode, de, node); 787 tmpfs_update(dvp, TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME); 788 789 /* Update the timestamps and trigger the event. */ 790 if (node->tn_vnode) { 791 VN_KNOTE(node->tn_vnode, NOTE_LINK); 792 } 793 tmpfs_update(vp, TMPFS_UPDATE_CTIME); 794 error = 0; 795 out: 796 VOP_UNLOCK(vp); 797 return error; 798 } 799 800 int 801 tmpfs_mkdir(void *v) 802 { 803 struct vop_mkdir_v3_args /* { 804 struct vnode *a_dvp; 805 struct vnode **a_vpp; 806 struct componentname *a_cnp; 807 struct vattr *a_vap; 808 } */ *ap = v; 809 vnode_t *dvp = ap->a_dvp; 810 vnode_t **vpp = ap->a_vpp; 811 struct componentname *cnp = ap->a_cnp; 812 struct vattr *vap = ap->a_vap; 813 814 KASSERT(vap->va_type == VDIR); 815 return tmpfs_construct_node(dvp, vpp, vap, cnp, NULL); 816 } 817 818 int 819 tmpfs_rmdir(void *v) 820 { 821 struct vop_rmdir_v2_args /* { 822 struct vnode *a_dvp; 823 struct vnode *a_vp; 824 struct componentname *a_cnp; 825 } */ *ap = v; 826 vnode_t *dvp = ap->a_dvp; 827 vnode_t *vp = ap->a_vp; 828 tmpfs_mount_t *tmp = VFS_TO_TMPFS(dvp->v_mount); 829 tmpfs_node_t *dnode = VP_TO_TMPFS_DIR(dvp); 830 tmpfs_node_t *node = VP_TO_TMPFS_DIR(vp); 831 tmpfs_dirent_t *de; 832 int error = 0; 833 834 KASSERT(VOP_ISLOCKED(dvp)); 835 KASSERT(VOP_ISLOCKED(vp)); 836 837 /* 838 * Directories with more than two entries ('.' and '..') cannot be 839 * removed. There may be whiteout entries, which we will destroy. 840 */ 841 if (node->tn_size > 0) { 842 /* 843 * If never had whiteout entries, the directory is certainly 844 * not empty. Otherwise, scan for any non-whiteout entry. 845 */ 846 if ((node->tn_gen & TMPFS_WHITEOUT_BIT) == 0) { 847 error = ENOTEMPTY; 848 goto out; 849 } 850 TAILQ_FOREACH(de, &node->tn_spec.tn_dir.tn_dir, td_entries) { 851 if (de->td_node != TMPFS_NODE_WHITEOUT) { 852 error = ENOTEMPTY; 853 goto out; 854 } 855 } 856 KASSERT(error == 0); 857 } 858 859 KASSERT(node->tn_spec.tn_dir.tn_parent == dnode); 860 861 /* Lookup the directory entry (check the cached hint first). */ 862 de = tmpfs_dir_cached(node); 863 if (de == NULL) { 864 struct componentname *cnp = ap->a_cnp; 865 de = tmpfs_dir_lookup(dnode, cnp); 866 } 867 KASSERT(de && de->td_node == node); 868 869 /* Check flags to see if we are allowed to remove the directory. */ 870 if (dnode->tn_flags & APPEND || node->tn_flags & (IMMUTABLE | APPEND)) { 871 error = EPERM; 872 goto out; 873 } 874 875 /* Decrement the link count for the virtual '.' entry. */ 876 node->tn_links--; 877 878 /* Detach the directory entry from the directory. */ 879 tmpfs_dir_detach(dnode, de); 880 881 /* Purge the cache for parent. */ 882 cache_purge(dvp); 883 884 /* 885 * Destroy the directory entry or replace it with a whiteout. 886 * 887 * Note: the inode referred by it will not be destroyed until the 888 * vnode is reclaimed. 889 */ 890 if (ap->a_cnp->cn_flags & DOWHITEOUT) 891 tmpfs_dir_attach(dnode, de, TMPFS_NODE_WHITEOUT); 892 else 893 tmpfs_free_dirent(tmp, de); 894 895 /* Destroy the whiteout entries from the node. */ 896 while ((de = TAILQ_FIRST(&node->tn_spec.tn_dir.tn_dir)) != NULL) { 897 KASSERT(de->td_node == TMPFS_NODE_WHITEOUT); 898 tmpfs_dir_detach(node, de); 899 tmpfs_free_dirent(tmp, de); 900 } 901 tmpfs_update(dvp, TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME); 902 903 KASSERT(node->tn_size == 0); 904 KASSERT(node->tn_links == 0); 905 out: 906 /* Release the node. */ 907 KASSERT(dvp != vp); 908 vput(vp); 909 return error; 910 } 911 912 int 913 tmpfs_symlink(void *v) 914 { 915 struct vop_symlink_v3_args /* { 916 struct vnode *a_dvp; 917 struct vnode **a_vpp; 918 struct componentname *a_cnp; 919 struct vattr *a_vap; 920 char *a_target; 921 } */ *ap = v; 922 vnode_t *dvp = ap->a_dvp; 923 vnode_t **vpp = ap->a_vpp; 924 struct componentname *cnp = ap->a_cnp; 925 struct vattr *vap = ap->a_vap; 926 char *target = ap->a_target; 927 928 KASSERT(vap->va_type == VLNK); 929 return tmpfs_construct_node(dvp, vpp, vap, cnp, target); 930 } 931 932 int 933 tmpfs_readdir(void *v) 934 { 935 struct vop_readdir_args /* { 936 struct vnode *a_vp; 937 struct uio *a_uio; 938 kauth_cred_t a_cred; 939 int *a_eofflag; 940 off_t **a_cookies; 941 int *ncookies; 942 } */ *ap = v; 943 vnode_t *vp = ap->a_vp; 944 struct uio *uio = ap->a_uio; 945 int *eofflag = ap->a_eofflag; 946 off_t **cookies = ap->a_cookies; 947 int *ncookies = ap->a_ncookies; 948 off_t startoff, cnt; 949 tmpfs_node_t *node; 950 int error; 951 952 KASSERT(VOP_ISLOCKED(vp)); 953 954 /* This operation only makes sense on directory nodes. */ 955 if (vp->v_type != VDIR) { 956 return ENOTDIR; 957 } 958 node = VP_TO_TMPFS_DIR(vp); 959 startoff = uio->uio_offset; 960 cnt = 0; 961 962 /* 963 * Retrieve the directory entries, unless it is being destroyed. 964 */ 965 if (node->tn_links) { 966 error = tmpfs_dir_getdents(node, uio, &cnt); 967 } else { 968 error = 0; 969 } 970 971 if (eofflag != NULL) { 972 *eofflag = !error && uio->uio_offset == TMPFS_DIRSEQ_EOF; 973 } 974 if (error || cookies == NULL || ncookies == NULL) { 975 return error; 976 } 977 978 /* Update NFS-related variables, if any. */ 979 tmpfs_dirent_t *de = NULL; 980 off_t i, off = startoff; 981 982 *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 983 *ncookies = cnt; 984 985 for (i = 0; i < cnt; i++) { 986 KASSERT(off != TMPFS_DIRSEQ_EOF); 987 if (off != TMPFS_DIRSEQ_DOT) { 988 if (off == TMPFS_DIRSEQ_DOTDOT) { 989 de = TAILQ_FIRST(&node->tn_spec.tn_dir.tn_dir); 990 } else if (de != NULL) { 991 de = TAILQ_NEXT(de, td_entries); 992 } else { 993 de = tmpfs_dir_lookupbyseq(node, off); 994 KASSERT(de != NULL); 995 de = TAILQ_NEXT(de, td_entries); 996 } 997 if (de == NULL) { 998 off = TMPFS_DIRSEQ_EOF; 999 } else { 1000 off = tmpfs_dir_getseq(node, de); 1001 } 1002 } else { 1003 off = TMPFS_DIRSEQ_DOTDOT; 1004 } 1005 (*cookies)[i] = off; 1006 } 1007 KASSERT(uio->uio_offset == off); 1008 return error; 1009 } 1010 1011 int 1012 tmpfs_readlink(void *v) 1013 { 1014 struct vop_readlink_args /* { 1015 struct vnode *a_vp; 1016 struct uio *a_uio; 1017 kauth_cred_t a_cred; 1018 } */ *ap = v; 1019 vnode_t *vp = ap->a_vp; 1020 struct uio *uio = ap->a_uio; 1021 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 1022 int error; 1023 1024 KASSERT(VOP_ISLOCKED(vp)); 1025 KASSERT(uio->uio_offset == 0); 1026 KASSERT(vp->v_type == VLNK); 1027 1028 /* Note: readlink(2) returns the path without NUL terminator. */ 1029 if (node->tn_size > 0) { 1030 error = uiomove(node->tn_spec.tn_lnk.tn_link, 1031 MIN(node->tn_size, uio->uio_resid), uio); 1032 } else { 1033 error = 0; 1034 } 1035 tmpfs_update(vp, TMPFS_UPDATE_ATIME); 1036 1037 return error; 1038 } 1039 1040 int 1041 tmpfs_inactive(void *v) 1042 { 1043 struct vop_inactive_v2_args /* { 1044 struct vnode *a_vp; 1045 bool *a_recycle; 1046 } */ *ap = v; 1047 vnode_t *vp = ap->a_vp; 1048 tmpfs_node_t *node; 1049 int error = 0; 1050 1051 KASSERT(VOP_ISLOCKED(vp)); 1052 1053 node = VP_TO_TMPFS_NODE(vp); 1054 if (node->tn_links == 0) { 1055 /* 1056 * Mark node as dead by setting its generation to zero. 1057 */ 1058 atomic_and_32(&node->tn_gen, ~TMPFS_NODE_GEN_MASK); 1059 1060 /* 1061 * If the file has been deleted, truncate it, otherwise VFS 1062 * will quite rightly try to write back dirty data, which in 1063 * the case of tmpfs/UAO means needless page deactivations. 1064 */ 1065 if (vp->v_type == VREG) { 1066 error = tmpfs_reg_resize(vp, 0); 1067 } 1068 *ap->a_recycle = true; 1069 } else { 1070 tmpfs_update(vp, 0); 1071 *ap->a_recycle = false; 1072 } 1073 1074 return error; 1075 } 1076 1077 int 1078 tmpfs_reclaim(void *v) 1079 { 1080 struct vop_reclaim_v2_args /* { 1081 struct vnode *a_vp; 1082 } */ *ap = v; 1083 vnode_t *vp = ap->a_vp; 1084 tmpfs_mount_t *tmp = VFS_TO_TMPFS(vp->v_mount); 1085 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 1086 1087 /* Unlock vnode. We still have exclusive access to it. */ 1088 VOP_UNLOCK(vp); 1089 1090 /* Disassociate inode from vnode. */ 1091 node->tn_vnode = NULL; 1092 vp->v_data = NULL; 1093 1094 /* If inode is not referenced, i.e. no links, then destroy it. */ 1095 if (node->tn_links == 0) 1096 tmpfs_free_node(tmp, node); 1097 return 0; 1098 } 1099 1100 int 1101 tmpfs_pathconf(void *v) 1102 { 1103 struct vop_pathconf_args /* { 1104 struct vnode *a_vp; 1105 int a_name; 1106 register_t *a_retval; 1107 } */ *ap = v; 1108 const int name = ap->a_name; 1109 register_t *retval = ap->a_retval; 1110 int error = 0; 1111 1112 switch (name) { 1113 case _PC_LINK_MAX: 1114 *retval = LINK_MAX; 1115 break; 1116 case _PC_NAME_MAX: 1117 *retval = TMPFS_MAXNAMLEN; 1118 break; 1119 case _PC_PATH_MAX: 1120 *retval = PATH_MAX; 1121 break; 1122 case _PC_PIPE_BUF: 1123 *retval = PIPE_BUF; 1124 break; 1125 case _PC_CHOWN_RESTRICTED: 1126 *retval = 1; 1127 break; 1128 case _PC_NO_TRUNC: 1129 *retval = 1; 1130 break; 1131 case _PC_SYNC_IO: 1132 *retval = 1; 1133 break; 1134 case _PC_FILESIZEBITS: 1135 *retval = sizeof(off_t) * CHAR_BIT; 1136 break; 1137 default: 1138 error = EINVAL; 1139 } 1140 return error; 1141 } 1142 1143 int 1144 tmpfs_advlock(void *v) 1145 { 1146 struct vop_advlock_args /* { 1147 struct vnode *a_vp; 1148 void * a_id; 1149 int a_op; 1150 struct flock *a_fl; 1151 int a_flags; 1152 } */ *ap = v; 1153 vnode_t *vp = ap->a_vp; 1154 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 1155 1156 return lf_advlock(v, &node->tn_lockf, node->tn_size); 1157 } 1158 1159 int 1160 tmpfs_getpages(void *v) 1161 { 1162 struct vop_getpages_args /* { 1163 struct vnode *a_vp; 1164 voff_t a_offset; 1165 struct vm_page **a_m; 1166 int *a_count; 1167 int a_centeridx; 1168 vm_prot_t a_access_type; 1169 int a_advice; 1170 int a_flags; 1171 } */ * const ap = v; 1172 vnode_t *vp = ap->a_vp; 1173 const voff_t offset = ap->a_offset; 1174 struct vm_page **pgs = ap->a_m; 1175 const int centeridx = ap->a_centeridx; 1176 const vm_prot_t access_type = ap->a_access_type; 1177 const int advice = ap->a_advice; 1178 const int flags = ap->a_flags; 1179 int error, iflag, npages = *ap->a_count; 1180 tmpfs_node_t *node; 1181 struct uvm_object *uobj; 1182 1183 KASSERT(vp->v_type == VREG); 1184 KASSERT(rw_lock_held(vp->v_uobj.vmobjlock)); 1185 1186 /* 1187 * Currently, PGO_PASTEOF is not supported. 1188 */ 1189 if (vp->v_size <= offset + (centeridx << PAGE_SHIFT)) { 1190 if ((flags & PGO_LOCKED) == 0) 1191 rw_exit(vp->v_uobj.vmobjlock); 1192 return EINVAL; 1193 } 1194 1195 if (vp->v_size < offset + (npages << PAGE_SHIFT)) { 1196 npages = (round_page(vp->v_size) - offset) >> PAGE_SHIFT; 1197 } 1198 1199 /* 1200 * Check for reclaimed vnode. v_interlock is not held here, but 1201 * VI_DEADCHECK is set with vmobjlock held. 1202 */ 1203 iflag = atomic_load_relaxed(&vp->v_iflag); 1204 if (__predict_false((iflag & VI_DEADCHECK) != 0)) { 1205 mutex_enter(vp->v_interlock); 1206 error = vdead_check(vp, VDEAD_NOWAIT); 1207 mutex_exit(vp->v_interlock); 1208 if (error) { 1209 if ((flags & PGO_LOCKED) == 0) 1210 rw_exit(vp->v_uobj.vmobjlock); 1211 return error; 1212 } 1213 } 1214 1215 node = VP_TO_TMPFS_NODE(vp); 1216 uobj = node->tn_spec.tn_reg.tn_aobj; 1217 1218 /* 1219 * Update timestamp lazily. The update will be made real when 1220 * a synchronous update is next made -- or by tmpfs_getattr, 1221 * tmpfs_putpages, and tmpfs_inactive. 1222 */ 1223 if ((flags & PGO_NOTIMESTAMP) == 0) { 1224 u_int tflags = 0; 1225 1226 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1227 tflags |= TMPFS_UPDATE_ATIME; 1228 1229 if ((access_type & VM_PROT_WRITE) != 0) { 1230 tflags |= TMPFS_UPDATE_MTIME; 1231 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1232 tflags |= TMPFS_UPDATE_ATIME; 1233 } 1234 tmpfs_update_lazily(vp, tflags); 1235 } 1236 1237 /* Invoke the pager. The vnode vmobjlock is shared with the UAO. */ 1238 KASSERT(vp->v_uobj.vmobjlock == uobj->vmobjlock); 1239 error = (*uobj->pgops->pgo_get)(uobj, offset, pgs, &npages, centeridx, 1240 access_type, advice, flags); 1241 #if defined(DEBUG) 1242 if (!error && pgs) { 1243 KASSERT(pgs[centeridx] != NULL); 1244 } 1245 #endif 1246 return error; 1247 } 1248 1249 int 1250 tmpfs_putpages(void *v) 1251 { 1252 struct vop_putpages_args /* { 1253 struct vnode *a_vp; 1254 voff_t a_offlo; 1255 voff_t a_offhi; 1256 int a_flags; 1257 } */ * const ap = v; 1258 vnode_t *vp = ap->a_vp; 1259 const voff_t offlo = ap->a_offlo; 1260 const voff_t offhi = ap->a_offhi; 1261 const int flags = ap->a_flags; 1262 tmpfs_node_t *node; 1263 struct uvm_object *uobj; 1264 int error; 1265 1266 KASSERT(rw_write_held(vp->v_uobj.vmobjlock)); 1267 1268 if (vp->v_type != VREG) { 1269 rw_exit(vp->v_uobj.vmobjlock); 1270 return 0; 1271 } 1272 1273 node = VP_TO_TMPFS_NODE(vp); 1274 uobj = node->tn_spec.tn_reg.tn_aobj; 1275 1276 KASSERT(vp->v_uobj.vmobjlock == uobj->vmobjlock); 1277 error = (*uobj->pgops->pgo_put)(uobj, offlo, offhi, flags); 1278 1279 /* XXX mtime */ 1280 1281 /* Process deferred updates. */ 1282 tmpfs_update(vp, 0); 1283 return error; 1284 } 1285 1286 int 1287 tmpfs_whiteout(void *v) 1288 { 1289 struct vop_whiteout_args /* { 1290 struct vnode *a_dvp; 1291 struct componentname *a_cnp; 1292 int a_flags; 1293 } */ *ap = v; 1294 vnode_t *dvp = ap->a_dvp; 1295 struct componentname *cnp = ap->a_cnp; 1296 const int flags = ap->a_flags; 1297 tmpfs_mount_t *tmp = VFS_TO_TMPFS(dvp->v_mount); 1298 tmpfs_node_t *dnode = VP_TO_TMPFS_DIR(dvp); 1299 tmpfs_dirent_t *de; 1300 int error; 1301 1302 switch (flags) { 1303 case LOOKUP: 1304 break; 1305 case CREATE: 1306 error = tmpfs_alloc_dirent(tmp, cnp->cn_nameptr, 1307 cnp->cn_namelen, &de); 1308 if (error) 1309 return error; 1310 tmpfs_dir_attach(dnode, de, TMPFS_NODE_WHITEOUT); 1311 break; 1312 case DELETE: 1313 cnp->cn_flags &= ~DOWHITEOUT; /* when in doubt, cargo cult */ 1314 de = tmpfs_dir_lookup(dnode, cnp); 1315 if (de == NULL) 1316 return ENOENT; 1317 tmpfs_dir_detach(dnode, de); 1318 tmpfs_free_dirent(tmp, de); 1319 break; 1320 } 1321 tmpfs_update(dvp, TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME); 1322 return 0; 1323 } 1324 1325 int 1326 tmpfs_print(void *v) 1327 { 1328 struct vop_print_args /* { 1329 struct vnode *a_vp; 1330 } */ *ap = v; 1331 vnode_t *vp = ap->a_vp; 1332 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 1333 1334 printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n" 1335 "\tmode 0%o, owner %d, group %d, size %" PRIdMAX, 1336 node, node->tn_flags, node->tn_links, node->tn_mode, node->tn_uid, 1337 node->tn_gid, (uintmax_t)node->tn_size); 1338 if (vp->v_type == VFIFO) { 1339 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 1340 } 1341 printf("\n"); 1342 return 0; 1343 } 1344