1 /* $NetBSD: tmpfs_vnops.c,v 1.39 2007/07/23 15:41:01 jmmv Exp $ */ 2 3 /*- 4 * Copyright (c) 2005, 2006 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 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/fcntl.h> 41 #include <sys/lockf.h> 42 #include <sys/namei.h> 43 #include <sys/priv.h> 44 #include <sys/proc.h> 45 #include <sys/resourcevar.h> 46 #include <sys/stat.h> 47 #include <sys/systm.h> 48 #include <sys/unistd.h> 49 #include <sys/vnode.h> 50 51 #include <vm/vm.h> 52 #include <vm/vm_object.h> 53 #include <vm/vm_page.h> 54 #include <vm/vm_pager.h> 55 56 #include <machine/_inttypes.h> 57 58 #include <fs/fifofs/fifo.h> 59 #include <fs/tmpfs/tmpfs_vnops.h> 60 #include <fs/tmpfs/tmpfs.h> 61 62 /* --------------------------------------------------------------------- */ 63 64 static int 65 tmpfs_lookup(struct vop_cachedlookup_args *v) 66 { 67 struct vnode *dvp = v->a_dvp; 68 struct vnode **vpp = v->a_vpp; 69 struct componentname *cnp = v->a_cnp; 70 struct thread *td = cnp->cn_thread; 71 72 int error; 73 struct tmpfs_dirent *de; 74 struct tmpfs_node *dnode; 75 76 dnode = VP_TO_TMPFS_DIR(dvp); 77 *vpp = NULLVP; 78 79 /* Check accessibility of requested node as a first step. */ 80 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td); 81 if (error != 0) 82 goto out; 83 84 /* We cannot be requesting the parent directory of the root node. */ 85 MPASS(IMPLIES(dnode->tn_type == VDIR && 86 dnode->tn_dir.tn_parent == dnode, 87 !(cnp->cn_flags & ISDOTDOT))); 88 89 if (cnp->cn_flags & ISDOTDOT) { 90 int ltype = 0; 91 92 ltype = VOP_ISLOCKED(dvp); 93 vhold(dvp); 94 VOP_UNLOCK(dvp, 0); 95 /* Allocate a new vnode on the matching entry. */ 96 error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, 97 cnp->cn_lkflags, vpp, td); 98 99 vn_lock(dvp, ltype | LK_RETRY); 100 vdrop(dvp); 101 } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 102 VREF(dvp); 103 *vpp = dvp; 104 error = 0; 105 } else { 106 de = tmpfs_dir_lookup(dnode, NULL, cnp); 107 if (de == NULL) { 108 /* The entry was not found in the directory. 109 * This is OK if we are creating or renaming an 110 * entry and are working on the last component of 111 * the path name. */ 112 if ((cnp->cn_flags & ISLASTCN) && 113 (cnp->cn_nameiop == CREATE || \ 114 cnp->cn_nameiop == RENAME)) { 115 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 116 cnp->cn_thread); 117 if (error != 0) 118 goto out; 119 120 /* Keep the component name in the buffer for 121 * future uses. */ 122 cnp->cn_flags |= SAVENAME; 123 124 error = EJUSTRETURN; 125 } else 126 error = ENOENT; 127 } else { 128 struct tmpfs_node *tnode; 129 130 /* The entry was found, so get its associated 131 * tmpfs_node. */ 132 tnode = de->td_node; 133 134 /* If we are not at the last path component and 135 * found a non-directory or non-link entry (which 136 * may itself be pointing to a directory), raise 137 * an error. */ 138 if ((tnode->tn_type != VDIR && 139 tnode->tn_type != VLNK) && 140 !(cnp->cn_flags & ISLASTCN)) { 141 error = ENOTDIR; 142 goto out; 143 } 144 145 /* If we are deleting or renaming the entry, keep 146 * track of its tmpfs_dirent so that it can be 147 * easily deleted later. */ 148 if ((cnp->cn_flags & ISLASTCN) && 149 (cnp->cn_nameiop == DELETE || 150 cnp->cn_nameiop == RENAME)) { 151 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 152 cnp->cn_thread); 153 if (error != 0) 154 goto out; 155 156 /* Allocate a new vnode on the matching entry. */ 157 error = tmpfs_alloc_vp(dvp->v_mount, tnode, 158 cnp->cn_lkflags, vpp, td); 159 if (error != 0) 160 goto out; 161 162 if ((dnode->tn_mode & S_ISTXT) && 163 VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 164 VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 165 error = EPERM; 166 vput(*vpp); 167 *vpp = NULL; 168 goto out; 169 } 170 cnp->cn_flags |= SAVENAME; 171 } else { 172 error = tmpfs_alloc_vp(dvp->v_mount, tnode, 173 cnp->cn_lkflags, vpp, td); 174 } 175 } 176 } 177 178 /* Store the result of this lookup in the cache. Avoid this if the 179 * request was for creation, as it does not improve timings on 180 * emprical tests. */ 181 if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 182 cache_enter(dvp, *vpp, cnp); 183 184 out: 185 /* If there were no errors, *vpp cannot be null and it must be 186 * locked. */ 187 MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp))); 188 189 return error; 190 } 191 192 /* --------------------------------------------------------------------- */ 193 194 static int 195 tmpfs_create(struct vop_create_args *v) 196 { 197 struct vnode *dvp = v->a_dvp; 198 struct vnode **vpp = v->a_vpp; 199 struct componentname *cnp = v->a_cnp; 200 struct vattr *vap = v->a_vap; 201 202 MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 203 204 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 205 } 206 /* --------------------------------------------------------------------- */ 207 208 static int 209 tmpfs_mknod(struct vop_mknod_args *v) 210 { 211 struct vnode *dvp = v->a_dvp; 212 struct vnode **vpp = v->a_vpp; 213 struct componentname *cnp = v->a_cnp; 214 struct vattr *vap = v->a_vap; 215 216 if (vap->va_type != VBLK && vap->va_type != VCHR && 217 vap->va_type != VFIFO) 218 return EINVAL; 219 220 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 221 } 222 223 /* --------------------------------------------------------------------- */ 224 225 static int 226 tmpfs_open(struct vop_open_args *v) 227 { 228 struct vnode *vp = v->a_vp; 229 int mode = v->a_mode; 230 231 int error; 232 struct tmpfs_node *node; 233 234 MPASS(VOP_ISLOCKED(vp)); 235 236 node = VP_TO_TMPFS_NODE(vp); 237 238 /* The file is still active but all its names have been removed 239 * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 240 * it is about to die. */ 241 if (node->tn_links < 1) 242 return (ENOENT); 243 244 /* If the file is marked append-only, deny write requests. */ 245 if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 246 error = EPERM; 247 else { 248 error = 0; 249 vnode_create_vobject(vp, node->tn_size, v->a_td); 250 } 251 252 MPASS(VOP_ISLOCKED(vp)); 253 return error; 254 } 255 256 /* --------------------------------------------------------------------- */ 257 258 static int 259 tmpfs_close(struct vop_close_args *v) 260 { 261 struct vnode *vp = v->a_vp; 262 263 struct tmpfs_node *node; 264 265 MPASS(VOP_ISLOCKED(vp)); 266 267 node = VP_TO_TMPFS_NODE(vp); 268 269 if (node->tn_links > 0) { 270 /* Update node times. No need to do it if the node has 271 * been deleted, because it will vanish after we return. */ 272 tmpfs_update(vp); 273 } 274 275 return 0; 276 } 277 278 /* --------------------------------------------------------------------- */ 279 280 int 281 tmpfs_access(struct vop_access_args *v) 282 { 283 struct vnode *vp = v->a_vp; 284 accmode_t accmode = v->a_accmode; 285 struct ucred *cred = v->a_cred; 286 287 int error; 288 struct tmpfs_node *node; 289 290 MPASS(VOP_ISLOCKED(vp)); 291 292 node = VP_TO_TMPFS_NODE(vp); 293 294 switch (vp->v_type) { 295 case VDIR: 296 /* FALLTHROUGH */ 297 case VLNK: 298 /* FALLTHROUGH */ 299 case VREG: 300 if (accmode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 301 error = EROFS; 302 goto out; 303 } 304 break; 305 306 case VBLK: 307 /* FALLTHROUGH */ 308 case VCHR: 309 /* FALLTHROUGH */ 310 case VSOCK: 311 /* FALLTHROUGH */ 312 case VFIFO: 313 break; 314 315 default: 316 error = EINVAL; 317 goto out; 318 } 319 320 if (accmode & VWRITE && node->tn_flags & IMMUTABLE) { 321 error = EPERM; 322 goto out; 323 } 324 325 error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 326 node->tn_gid, accmode, cred, NULL); 327 328 out: 329 MPASS(VOP_ISLOCKED(vp)); 330 331 return error; 332 } 333 334 /* --------------------------------------------------------------------- */ 335 336 int 337 tmpfs_getattr(struct vop_getattr_args *v) 338 { 339 struct vnode *vp = v->a_vp; 340 struct vattr *vap = v->a_vap; 341 342 struct tmpfs_node *node; 343 344 node = VP_TO_TMPFS_NODE(vp); 345 346 tmpfs_update(vp); 347 348 vap->va_type = vp->v_type; 349 vap->va_mode = node->tn_mode; 350 vap->va_nlink = node->tn_links; 351 vap->va_uid = node->tn_uid; 352 vap->va_gid = node->tn_gid; 353 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 354 vap->va_fileid = node->tn_id; 355 vap->va_size = node->tn_size; 356 vap->va_blocksize = PAGE_SIZE; 357 vap->va_atime = node->tn_atime; 358 vap->va_mtime = node->tn_mtime; 359 vap->va_ctime = node->tn_ctime; 360 vap->va_birthtime = node->tn_birthtime; 361 vap->va_gen = node->tn_gen; 362 vap->va_flags = node->tn_flags; 363 vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 364 node->tn_rdev : NODEV; 365 vap->va_bytes = round_page(node->tn_size); 366 vap->va_filerev = 0; 367 368 return 0; 369 } 370 371 /* --------------------------------------------------------------------- */ 372 373 /* XXX Should this operation be atomic? I think it should, but code in 374 * XXX other places (e.g., ufs) doesn't seem to be... */ 375 int 376 tmpfs_setattr(struct vop_setattr_args *v) 377 { 378 struct vnode *vp = v->a_vp; 379 struct vattr *vap = v->a_vap; 380 struct ucred *cred = v->a_cred; 381 struct thread *td = curthread; 382 383 int error; 384 385 MPASS(VOP_ISLOCKED(vp)); 386 387 error = 0; 388 389 /* Abort if any unsettable attribute is given. */ 390 if (vap->va_type != VNON || 391 vap->va_nlink != VNOVAL || 392 vap->va_fsid != VNOVAL || 393 vap->va_fileid != VNOVAL || 394 vap->va_blocksize != VNOVAL || 395 vap->va_gen != VNOVAL || 396 vap->va_rdev != VNOVAL || 397 vap->va_bytes != VNOVAL) 398 error = EINVAL; 399 400 if (error == 0 && (vap->va_flags != VNOVAL)) 401 error = tmpfs_chflags(vp, vap->va_flags, cred, td); 402 403 if (error == 0 && (vap->va_size != VNOVAL)) 404 error = tmpfs_chsize(vp, vap->va_size, cred, td); 405 406 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 407 error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); 408 409 if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 410 error = tmpfs_chmod(vp, vap->va_mode, cred, td); 411 412 if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 413 vap->va_atime.tv_nsec != VNOVAL) || 414 (vap->va_mtime.tv_sec != VNOVAL && 415 vap->va_mtime.tv_nsec != VNOVAL) || 416 (vap->va_birthtime.tv_sec != VNOVAL && 417 vap->va_birthtime.tv_nsec != VNOVAL))) 418 error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 419 &vap->va_birthtime, vap->va_vaflags, cred, td); 420 421 /* Update the node times. We give preference to the error codes 422 * generated by this function rather than the ones that may arise 423 * from tmpfs_update. */ 424 tmpfs_update(vp); 425 426 MPASS(VOP_ISLOCKED(vp)); 427 428 return error; 429 } 430 431 /* --------------------------------------------------------------------- */ 432 433 static int 434 tmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 435 { 436 vm_pindex_t idx; 437 vm_page_t m; 438 vm_offset_t offset; 439 off_t addr; 440 size_t tlen; 441 int error; 442 443 addr = uio->uio_offset; 444 idx = OFF_TO_IDX(addr); 445 offset = addr & PAGE_MASK; 446 tlen = MIN(PAGE_SIZE - offset, len); 447 448 if ((vobj == NULL) || (vobj->resident_page_count == 0)) 449 goto nocache; 450 451 VM_OBJECT_LOCK(vobj); 452 lookupvpg: 453 if (((m = vm_page_lookup(vobj, idx)) != NULL) && 454 vm_page_is_valid(m, offset, tlen)) { 455 if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 456 goto lookupvpg; 457 vm_page_busy(m); 458 VM_OBJECT_UNLOCK(vobj); 459 error = uiomove_fromphys(&m, offset, tlen, uio); 460 VM_OBJECT_LOCK(vobj); 461 vm_page_wakeup(m); 462 VM_OBJECT_UNLOCK(vobj); 463 return (error); 464 } 465 VM_OBJECT_UNLOCK(vobj); 466 nocache: 467 VM_OBJECT_LOCK(tobj); 468 vm_object_pip_add(tobj, 1); 469 m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 470 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 471 if (m->valid != VM_PAGE_BITS_ALL) { 472 int behind, ahead; 473 if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 474 error = vm_pager_get_pages(tobj, &m, 1, 0); 475 if (error != 0) { 476 printf("tmpfs get pages from pager error [read]\n"); 477 goto out; 478 } 479 } else 480 vm_page_zero_invalid(m, TRUE); 481 } 482 VM_OBJECT_UNLOCK(tobj); 483 error = uiomove_fromphys(&m, offset, tlen, uio); 484 VM_OBJECT_LOCK(tobj); 485 out: 486 vm_page_lock_queues(); 487 vm_page_unwire(m, TRUE); 488 vm_page_unlock_queues(); 489 vm_page_wakeup(m); 490 vm_object_pip_subtract(tobj, 1); 491 VM_OBJECT_UNLOCK(tobj); 492 493 return (error); 494 } 495 496 static int 497 tmpfs_read(struct vop_read_args *v) 498 { 499 struct vnode *vp = v->a_vp; 500 struct uio *uio = v->a_uio; 501 502 struct tmpfs_node *node; 503 vm_object_t uobj; 504 size_t len; 505 int resid; 506 507 int error = 0; 508 509 node = VP_TO_TMPFS_NODE(vp); 510 511 if (vp->v_type != VREG) { 512 error = EISDIR; 513 goto out; 514 } 515 516 if (uio->uio_offset < 0) { 517 error = EINVAL; 518 goto out; 519 } 520 521 node->tn_status |= TMPFS_NODE_ACCESSED; 522 523 uobj = node->tn_reg.tn_aobj; 524 while ((resid = uio->uio_resid) > 0) { 525 error = 0; 526 if (node->tn_size <= uio->uio_offset) 527 break; 528 len = MIN(node->tn_size - uio->uio_offset, resid); 529 if (len == 0) 530 break; 531 error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 532 if ((error != 0) || (resid == uio->uio_resid)) 533 break; 534 } 535 536 out: 537 538 return error; 539 } 540 541 /* --------------------------------------------------------------------- */ 542 543 static int 544 tmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 545 { 546 vm_pindex_t idx; 547 vm_page_t vpg, tpg; 548 vm_offset_t offset; 549 off_t addr; 550 size_t tlen; 551 int error; 552 553 error = 0; 554 555 addr = uio->uio_offset; 556 idx = OFF_TO_IDX(addr); 557 offset = addr & PAGE_MASK; 558 tlen = MIN(PAGE_SIZE - offset, len); 559 560 if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 561 vpg = NULL; 562 goto nocache; 563 } 564 565 VM_OBJECT_LOCK(vobj); 566 lookupvpg: 567 if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 568 vm_page_is_valid(vpg, offset, tlen)) { 569 if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 570 goto lookupvpg; 571 vm_page_busy(vpg); 572 vm_page_lock_queues(); 573 vm_page_undirty(vpg); 574 vm_page_unlock_queues(); 575 VM_OBJECT_UNLOCK(vobj); 576 error = uiomove_fromphys(&vpg, offset, tlen, uio); 577 } else { 578 VM_OBJECT_UNLOCK(vobj); 579 vpg = NULL; 580 } 581 nocache: 582 VM_OBJECT_LOCK(tobj); 583 vm_object_pip_add(tobj, 1); 584 tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 585 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 586 if (tpg->valid != VM_PAGE_BITS_ALL) { 587 int behind, ahead; 588 if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 589 error = vm_pager_get_pages(tobj, &tpg, 1, 0); 590 if (error != 0) { 591 printf("tmpfs get pages from pager error [write]\n"); 592 goto out; 593 } 594 } else 595 vm_page_zero_invalid(tpg, TRUE); 596 } 597 VM_OBJECT_UNLOCK(tobj); 598 if (vpg == NULL) 599 error = uiomove_fromphys(&tpg, offset, tlen, uio); 600 else { 601 KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 602 pmap_copy_page(vpg, tpg); 603 } 604 VM_OBJECT_LOCK(tobj); 605 out: 606 if (vobj != NULL) 607 VM_OBJECT_LOCK(vobj); 608 vm_page_lock_queues(); 609 if (error == 0) { 610 vm_page_set_validclean(tpg, offset, tlen); 611 vm_page_zero_invalid(tpg, TRUE); 612 vm_page_dirty(tpg); 613 } 614 vm_page_unwire(tpg, TRUE); 615 vm_page_unlock_queues(); 616 vm_page_wakeup(tpg); 617 if (vpg != NULL) 618 vm_page_wakeup(vpg); 619 if (vobj != NULL) 620 VM_OBJECT_UNLOCK(vobj); 621 vm_object_pip_subtract(tobj, 1); 622 VM_OBJECT_UNLOCK(tobj); 623 624 return (error); 625 } 626 627 static int 628 tmpfs_write(struct vop_write_args *v) 629 { 630 struct vnode *vp = v->a_vp; 631 struct uio *uio = v->a_uio; 632 int ioflag = v->a_ioflag; 633 struct thread *td = uio->uio_td; 634 635 boolean_t extended; 636 int error = 0; 637 off_t oldsize; 638 struct tmpfs_node *node; 639 vm_object_t uobj; 640 size_t len; 641 int resid; 642 643 node = VP_TO_TMPFS_NODE(vp); 644 oldsize = node->tn_size; 645 646 if (uio->uio_offset < 0 || vp->v_type != VREG) { 647 error = EINVAL; 648 goto out; 649 } 650 651 if (uio->uio_resid == 0) { 652 error = 0; 653 goto out; 654 } 655 656 if (ioflag & IO_APPEND) 657 uio->uio_offset = node->tn_size; 658 659 if (uio->uio_offset + uio->uio_resid > 660 VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 661 return (EFBIG); 662 663 if (vp->v_type == VREG && td != NULL) { 664 PROC_LOCK(td->td_proc); 665 if (uio->uio_offset + uio->uio_resid > 666 lim_cur(td->td_proc, RLIMIT_FSIZE)) { 667 psignal(td->td_proc, SIGXFSZ); 668 PROC_UNLOCK(td->td_proc); 669 return (EFBIG); 670 } 671 PROC_UNLOCK(td->td_proc); 672 } 673 674 extended = uio->uio_offset + uio->uio_resid > node->tn_size; 675 if (extended) { 676 error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 677 if (error != 0) 678 goto out; 679 } 680 681 uobj = node->tn_reg.tn_aobj; 682 while ((resid = uio->uio_resid) > 0) { 683 if (node->tn_size <= uio->uio_offset) 684 break; 685 len = MIN(node->tn_size - uio->uio_offset, resid); 686 if (len == 0) 687 break; 688 error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 689 if ((error != 0) || (resid == uio->uio_resid)) 690 break; 691 } 692 693 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 694 (extended ? TMPFS_NODE_CHANGED : 0); 695 696 if (node->tn_mode & (S_ISUID | S_ISGID)) { 697 if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 698 node->tn_mode &= ~(S_ISUID | S_ISGID); 699 } 700 701 if (error != 0) 702 (void)tmpfs_reg_resize(vp, oldsize); 703 704 out: 705 MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 706 MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 707 708 return error; 709 } 710 711 /* --------------------------------------------------------------------- */ 712 713 static int 714 tmpfs_fsync(struct vop_fsync_args *v) 715 { 716 struct vnode *vp = v->a_vp; 717 718 MPASS(VOP_ISLOCKED(vp)); 719 720 tmpfs_update(vp); 721 722 return 0; 723 } 724 725 /* --------------------------------------------------------------------- */ 726 727 static int 728 tmpfs_remove(struct vop_remove_args *v) 729 { 730 struct vnode *dvp = v->a_dvp; 731 struct vnode *vp = v->a_vp; 732 733 int error; 734 struct tmpfs_dirent *de; 735 struct tmpfs_mount *tmp; 736 struct tmpfs_node *dnode; 737 struct tmpfs_node *node; 738 739 MPASS(VOP_ISLOCKED(dvp)); 740 MPASS(VOP_ISLOCKED(vp)); 741 742 if (vp->v_type == VDIR) { 743 error = EISDIR; 744 goto out; 745 } 746 747 dnode = VP_TO_TMPFS_DIR(dvp); 748 node = VP_TO_TMPFS_NODE(vp); 749 tmp = VFS_TO_TMPFS(vp->v_mount); 750 de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 751 MPASS(de != NULL); 752 753 /* Files marked as immutable or append-only cannot be deleted. */ 754 if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 755 (dnode->tn_flags & APPEND)) { 756 error = EPERM; 757 goto out; 758 } 759 760 /* Remove the entry from the directory; as it is a file, we do not 761 * have to change the number of hard links of the directory. */ 762 tmpfs_dir_detach(dvp, de); 763 764 /* Free the directory entry we just deleted. Note that the node 765 * referred by it will not be removed until the vnode is really 766 * reclaimed. */ 767 tmpfs_free_dirent(tmp, de, TRUE); 768 769 if (node->tn_links > 0) 770 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 771 TMPFS_NODE_MODIFIED; 772 error = 0; 773 774 out: 775 776 return error; 777 } 778 779 /* --------------------------------------------------------------------- */ 780 781 static int 782 tmpfs_link(struct vop_link_args *v) 783 { 784 struct vnode *dvp = v->a_tdvp; 785 struct vnode *vp = v->a_vp; 786 struct componentname *cnp = v->a_cnp; 787 788 int error; 789 struct tmpfs_dirent *de; 790 struct tmpfs_node *node; 791 792 MPASS(VOP_ISLOCKED(dvp)); 793 MPASS(cnp->cn_flags & HASBUF); 794 MPASS(dvp != vp); /* XXX When can this be false? */ 795 796 node = VP_TO_TMPFS_NODE(vp); 797 798 /* XXX: Why aren't the following two tests done by the caller? */ 799 800 /* Hard links of directories are forbidden. */ 801 if (vp->v_type == VDIR) { 802 error = EPERM; 803 goto out; 804 } 805 806 /* Cannot create cross-device links. */ 807 if (dvp->v_mount != vp->v_mount) { 808 error = EXDEV; 809 goto out; 810 } 811 812 /* Ensure that we do not overflow the maximum number of links imposed 813 * by the system. */ 814 MPASS(node->tn_links <= LINK_MAX); 815 if (node->tn_links == LINK_MAX) { 816 error = EMLINK; 817 goto out; 818 } 819 820 /* We cannot create links of files marked immutable or append-only. */ 821 if (node->tn_flags & (IMMUTABLE | APPEND)) { 822 error = EPERM; 823 goto out; 824 } 825 826 /* Allocate a new directory entry to represent the node. */ 827 error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 828 cnp->cn_nameptr, cnp->cn_namelen, &de); 829 if (error != 0) 830 goto out; 831 832 /* Insert the new directory entry into the appropriate directory. */ 833 tmpfs_dir_attach(dvp, de); 834 835 /* vp link count has changed, so update node times. */ 836 node->tn_status |= TMPFS_NODE_CHANGED; 837 tmpfs_update(vp); 838 839 error = 0; 840 841 out: 842 return error; 843 } 844 845 /* --------------------------------------------------------------------- */ 846 847 static int 848 tmpfs_rename(struct vop_rename_args *v) 849 { 850 struct vnode *fdvp = v->a_fdvp; 851 struct vnode *fvp = v->a_fvp; 852 struct componentname *fcnp = v->a_fcnp; 853 struct vnode *tdvp = v->a_tdvp; 854 struct vnode *tvp = v->a_tvp; 855 struct componentname *tcnp = v->a_tcnp; 856 857 char *newname; 858 int error; 859 struct tmpfs_dirent *de; 860 struct tmpfs_node *fdnode; 861 struct tmpfs_node *fnode; 862 struct tmpfs_node *tnode; 863 struct tmpfs_node *tdnode; 864 865 MPASS(VOP_ISLOCKED(tdvp)); 866 MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 867 MPASS(fcnp->cn_flags & HASBUF); 868 MPASS(tcnp->cn_flags & HASBUF); 869 870 tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 871 872 /* Disallow cross-device renames. 873 * XXX Why isn't this done by the caller? */ 874 if (fvp->v_mount != tdvp->v_mount || 875 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 876 error = EXDEV; 877 goto out; 878 } 879 880 tdnode = VP_TO_TMPFS_DIR(tdvp); 881 882 /* If source and target are the same file, there is nothing to do. */ 883 if (fvp == tvp) { 884 error = 0; 885 goto out; 886 } 887 888 /* If we need to move the directory between entries, lock the 889 * source so that we can safely operate on it. */ 890 if (tdvp != fdvp) { 891 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 892 if (error != 0) 893 goto out; 894 } 895 fdnode = VP_TO_TMPFS_DIR(fdvp); 896 fnode = VP_TO_TMPFS_NODE(fvp); 897 de = tmpfs_dir_lookup(fdnode, fnode, fcnp); 898 899 /* Avoid manipulating '.' and '..' entries. */ 900 if (de == NULL) { 901 MPASS(fvp->v_type == VDIR); 902 error = EINVAL; 903 goto out_locked; 904 } 905 MPASS(de->td_node == fnode); 906 907 /* If re-naming a directory to another preexisting directory 908 * ensure that the target directory is empty so that its 909 * removal causes no side effects. 910 * Kern_rename gurantees the destination to be a directory 911 * if the source is one. */ 912 if (tvp != NULL) { 913 MPASS(tnode != NULL); 914 915 if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 916 (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 917 error = EPERM; 918 goto out_locked; 919 } 920 921 if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 922 if (tnode->tn_size > 0) { 923 error = ENOTEMPTY; 924 goto out_locked; 925 } 926 } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 927 error = ENOTDIR; 928 goto out_locked; 929 } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 930 error = EISDIR; 931 goto out_locked; 932 } else { 933 MPASS(fnode->tn_type != VDIR && 934 tnode->tn_type != VDIR); 935 } 936 } 937 938 if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 939 || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 940 error = EPERM; 941 goto out_locked; 942 } 943 944 /* Ensure that we have enough memory to hold the new name, if it 945 * has to be changed. */ 946 if (fcnp->cn_namelen != tcnp->cn_namelen || 947 bcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 948 newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 949 } else 950 newname = NULL; 951 952 /* If the node is being moved to another directory, we have to do 953 * the move. */ 954 if (fdnode != tdnode) { 955 /* In case we are moving a directory, we have to adjust its 956 * parent to point to the new parent. */ 957 if (de->td_node->tn_type == VDIR) { 958 struct tmpfs_node *n; 959 960 /* Ensure the target directory is not a child of the 961 * directory being moved. Otherwise, we'd end up 962 * with stale nodes. */ 963 n = tdnode; 964 while (n != n->tn_dir.tn_parent) { 965 if (n == fnode) { 966 error = EINVAL; 967 if (newname != NULL) 968 free(newname, M_TMPFSNAME); 969 goto out_locked; 970 } 971 n = n->tn_dir.tn_parent; 972 } 973 974 /* Adjust the parent pointer. */ 975 TMPFS_VALIDATE_DIR(fnode); 976 de->td_node->tn_dir.tn_parent = tdnode; 977 978 /* As a result of changing the target of the '..' 979 * entry, the link count of the source and target 980 * directories has to be adjusted. */ 981 fdnode->tn_links--; 982 tdnode->tn_links++; 983 } 984 985 /* Do the move: just remove the entry from the source directory 986 * and insert it into the target one. */ 987 tmpfs_dir_detach(fdvp, de); 988 tmpfs_dir_attach(tdvp, de); 989 } 990 991 /* If the name has changed, we need to make it effective by changing 992 * it in the directory entry. */ 993 if (newname != NULL) { 994 MPASS(tcnp->cn_namelen <= MAXNAMLEN); 995 996 free(de->td_name, M_TMPFSNAME); 997 de->td_namelen = (uint16_t)tcnp->cn_namelen; 998 memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 999 de->td_name = newname; 1000 1001 fnode->tn_status |= TMPFS_NODE_CHANGED; 1002 tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1003 } 1004 1005 /* If we are overwriting an entry, we have to remove the old one 1006 * from the target directory. */ 1007 if (tvp != NULL) { 1008 /* Remove the old entry from the target directory. */ 1009 de = tmpfs_dir_lookup(tdnode, tnode, tcnp); 1010 tmpfs_dir_detach(tdvp, de); 1011 1012 /* Free the directory entry we just deleted. Note that the 1013 * node referred by it will not be removed until the vnode is 1014 * really reclaimed. */ 1015 tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1016 } 1017 1018 error = 0; 1019 1020 out_locked: 1021 if (fdnode != tdnode) 1022 VOP_UNLOCK(fdvp, 0); 1023 1024 out: 1025 /* Release target nodes. */ 1026 /* XXX: I don't understand when tdvp can be the same as tvp, but 1027 * other code takes care of this... */ 1028 if (tdvp == tvp) 1029 vrele(tdvp); 1030 else 1031 vput(tdvp); 1032 if (tvp != NULL) 1033 vput(tvp); 1034 1035 /* Release source nodes. */ 1036 vrele(fdvp); 1037 vrele(fvp); 1038 1039 return error; 1040 } 1041 1042 /* --------------------------------------------------------------------- */ 1043 1044 static int 1045 tmpfs_mkdir(struct vop_mkdir_args *v) 1046 { 1047 struct vnode *dvp = v->a_dvp; 1048 struct vnode **vpp = v->a_vpp; 1049 struct componentname *cnp = v->a_cnp; 1050 struct vattr *vap = v->a_vap; 1051 1052 MPASS(vap->va_type == VDIR); 1053 1054 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1055 } 1056 1057 /* --------------------------------------------------------------------- */ 1058 1059 static int 1060 tmpfs_rmdir(struct vop_rmdir_args *v) 1061 { 1062 struct vnode *dvp = v->a_dvp; 1063 struct vnode *vp = v->a_vp; 1064 1065 int error; 1066 struct tmpfs_dirent *de; 1067 struct tmpfs_mount *tmp; 1068 struct tmpfs_node *dnode; 1069 struct tmpfs_node *node; 1070 1071 MPASS(VOP_ISLOCKED(dvp)); 1072 MPASS(VOP_ISLOCKED(vp)); 1073 1074 tmp = VFS_TO_TMPFS(dvp->v_mount); 1075 dnode = VP_TO_TMPFS_DIR(dvp); 1076 node = VP_TO_TMPFS_DIR(vp); 1077 1078 /* Directories with more than two entries ('.' and '..') cannot be 1079 * removed. */ 1080 if (node->tn_size > 0) { 1081 error = ENOTEMPTY; 1082 goto out; 1083 } 1084 1085 if ((dnode->tn_flags & APPEND) 1086 || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1087 error = EPERM; 1088 goto out; 1089 } 1090 1091 /* This invariant holds only if we are not trying to remove "..". 1092 * We checked for that above so this is safe now. */ 1093 MPASS(node->tn_dir.tn_parent == dnode); 1094 1095 /* Get the directory entry associated with node (vp). This was 1096 * filled by tmpfs_lookup while looking up the entry. */ 1097 de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 1098 MPASS(TMPFS_DIRENT_MATCHES(de, 1099 v->a_cnp->cn_nameptr, 1100 v->a_cnp->cn_namelen)); 1101 1102 /* Check flags to see if we are allowed to remove the directory. */ 1103 if (dnode->tn_flags & APPEND 1104 || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1105 error = EPERM; 1106 goto out; 1107 } 1108 1109 /* Detach the directory entry from the directory (dnode). */ 1110 tmpfs_dir_detach(dvp, de); 1111 1112 node->tn_links--; 1113 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1114 TMPFS_NODE_MODIFIED; 1115 node->tn_dir.tn_parent->tn_links--; 1116 node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1117 TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1118 1119 cache_purge(dvp); 1120 cache_purge(vp); 1121 1122 /* Free the directory entry we just deleted. Note that the node 1123 * referred by it will not be removed until the vnode is really 1124 * reclaimed. */ 1125 tmpfs_free_dirent(tmp, de, TRUE); 1126 1127 /* Release the deleted vnode (will destroy the node, notify 1128 * interested parties and clean it from the cache). */ 1129 1130 dnode->tn_status |= TMPFS_NODE_CHANGED; 1131 tmpfs_update(dvp); 1132 1133 error = 0; 1134 1135 out: 1136 return error; 1137 } 1138 1139 /* --------------------------------------------------------------------- */ 1140 1141 static int 1142 tmpfs_symlink(struct vop_symlink_args *v) 1143 { 1144 struct vnode *dvp = v->a_dvp; 1145 struct vnode **vpp = v->a_vpp; 1146 struct componentname *cnp = v->a_cnp; 1147 struct vattr *vap = v->a_vap; 1148 char *target = v->a_target; 1149 1150 #ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1151 MPASS(vap->va_type == VLNK); 1152 #else 1153 vap->va_type = VLNK; 1154 #endif 1155 1156 return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1157 } 1158 1159 /* --------------------------------------------------------------------- */ 1160 1161 static int 1162 tmpfs_readdir(struct vop_readdir_args *v) 1163 { 1164 struct vnode *vp = v->a_vp; 1165 struct uio *uio = v->a_uio; 1166 int *eofflag = v->a_eofflag; 1167 u_long **cookies = v->a_cookies; 1168 int *ncookies = v->a_ncookies; 1169 1170 int error; 1171 off_t startoff; 1172 off_t cnt = 0; 1173 struct tmpfs_node *node; 1174 1175 /* This operation only makes sense on directory nodes. */ 1176 if (vp->v_type != VDIR) 1177 return ENOTDIR; 1178 1179 node = VP_TO_TMPFS_DIR(vp); 1180 1181 startoff = uio->uio_offset; 1182 1183 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1184 error = tmpfs_dir_getdotdent(node, uio); 1185 if (error != 0) 1186 goto outok; 1187 cnt++; 1188 } 1189 1190 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1191 error = tmpfs_dir_getdotdotdent(node, uio); 1192 if (error != 0) 1193 goto outok; 1194 cnt++; 1195 } 1196 1197 error = tmpfs_dir_getdents(node, uio, &cnt); 1198 1199 outok: 1200 MPASS(error >= -1); 1201 1202 if (error == -1) 1203 error = 0; 1204 1205 if (eofflag != NULL) 1206 *eofflag = 1207 (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1208 1209 /* Update NFS-related variables. */ 1210 if (error == 0 && cookies != NULL && ncookies != NULL) { 1211 off_t i; 1212 off_t off = startoff; 1213 struct tmpfs_dirent *de = NULL; 1214 1215 *ncookies = cnt; 1216 *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1217 1218 for (i = 0; i < cnt; i++) { 1219 MPASS(off != TMPFS_DIRCOOKIE_EOF); 1220 if (off == TMPFS_DIRCOOKIE_DOT) { 1221 off = TMPFS_DIRCOOKIE_DOTDOT; 1222 } else { 1223 if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1224 de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1225 } else if (de != NULL) { 1226 de = TAILQ_NEXT(de, td_entries); 1227 } else { 1228 de = tmpfs_dir_lookupbycookie(node, 1229 off); 1230 MPASS(de != NULL); 1231 de = TAILQ_NEXT(de, td_entries); 1232 } 1233 if (de == NULL) 1234 off = TMPFS_DIRCOOKIE_EOF; 1235 else 1236 off = tmpfs_dircookie(de); 1237 } 1238 1239 (*cookies)[i] = off; 1240 } 1241 MPASS(uio->uio_offset == off); 1242 } 1243 1244 return error; 1245 } 1246 1247 /* --------------------------------------------------------------------- */ 1248 1249 static int 1250 tmpfs_readlink(struct vop_readlink_args *v) 1251 { 1252 struct vnode *vp = v->a_vp; 1253 struct uio *uio = v->a_uio; 1254 1255 int error; 1256 struct tmpfs_node *node; 1257 1258 MPASS(uio->uio_offset == 0); 1259 MPASS(vp->v_type == VLNK); 1260 1261 node = VP_TO_TMPFS_NODE(vp); 1262 1263 error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1264 uio); 1265 node->tn_status |= TMPFS_NODE_ACCESSED; 1266 1267 return error; 1268 } 1269 1270 /* --------------------------------------------------------------------- */ 1271 1272 static int 1273 tmpfs_inactive(struct vop_inactive_args *v) 1274 { 1275 struct vnode *vp = v->a_vp; 1276 struct thread *l = v->a_td; 1277 1278 struct tmpfs_node *node; 1279 1280 MPASS(VOP_ISLOCKED(vp)); 1281 1282 node = VP_TO_TMPFS_NODE(vp); 1283 1284 if (node->tn_links == 0) 1285 vrecycle(vp, l); 1286 1287 return 0; 1288 } 1289 1290 /* --------------------------------------------------------------------- */ 1291 1292 int 1293 tmpfs_reclaim(struct vop_reclaim_args *v) 1294 { 1295 struct vnode *vp = v->a_vp; 1296 1297 struct tmpfs_mount *tmp; 1298 struct tmpfs_node *node; 1299 1300 node = VP_TO_TMPFS_NODE(vp); 1301 tmp = VFS_TO_TMPFS(vp->v_mount); 1302 1303 vnode_destroy_vobject(vp); 1304 cache_purge(vp); 1305 tmpfs_free_vp(vp); 1306 1307 /* If the node referenced by this vnode was deleted by the user, 1308 * we must free its associated data structures (now that the vnode 1309 * is being reclaimed). */ 1310 if (node->tn_links == 0) 1311 tmpfs_free_node(tmp, node); 1312 1313 MPASS(vp->v_data == NULL); 1314 return 0; 1315 } 1316 1317 /* --------------------------------------------------------------------- */ 1318 1319 static int 1320 tmpfs_print(struct vop_print_args *v) 1321 { 1322 struct vnode *vp = v->a_vp; 1323 1324 struct tmpfs_node *node; 1325 1326 node = VP_TO_TMPFS_NODE(vp); 1327 1328 printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1329 node, node->tn_flags, node->tn_links); 1330 printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1331 ", status 0x%x\n", 1332 node->tn_mode, node->tn_uid, node->tn_gid, 1333 (uintmax_t)node->tn_size, node->tn_status); 1334 1335 if (vp->v_type == VFIFO) 1336 fifo_printinfo(vp); 1337 1338 printf("\n"); 1339 1340 return 0; 1341 } 1342 1343 /* --------------------------------------------------------------------- */ 1344 1345 static int 1346 tmpfs_pathconf(struct vop_pathconf_args *v) 1347 { 1348 int name = v->a_name; 1349 register_t *retval = v->a_retval; 1350 1351 int error; 1352 1353 error = 0; 1354 1355 switch (name) { 1356 case _PC_LINK_MAX: 1357 *retval = LINK_MAX; 1358 break; 1359 1360 case _PC_NAME_MAX: 1361 *retval = NAME_MAX; 1362 break; 1363 1364 case _PC_PATH_MAX: 1365 *retval = PATH_MAX; 1366 break; 1367 1368 case _PC_PIPE_BUF: 1369 *retval = PIPE_BUF; 1370 break; 1371 1372 case _PC_CHOWN_RESTRICTED: 1373 *retval = 1; 1374 break; 1375 1376 case _PC_NO_TRUNC: 1377 *retval = 1; 1378 break; 1379 1380 case _PC_SYNC_IO: 1381 *retval = 1; 1382 break; 1383 1384 case _PC_FILESIZEBITS: 1385 *retval = 0; /* XXX Don't know which value should I return. */ 1386 break; 1387 1388 default: 1389 error = EINVAL; 1390 } 1391 1392 return error; 1393 } 1394 1395 static int 1396 tmpfs_vptofh(struct vop_vptofh_args *ap) 1397 { 1398 struct tmpfs_fid *tfhp; 1399 struct tmpfs_node *node; 1400 1401 tfhp = (struct tmpfs_fid *)ap->a_fhp; 1402 node = VP_TO_TMPFS_NODE(ap->a_vp); 1403 1404 tfhp->tf_len = sizeof(struct tmpfs_fid); 1405 tfhp->tf_id = node->tn_id; 1406 tfhp->tf_gen = node->tn_gen; 1407 1408 return (0); 1409 } 1410 1411 /* --------------------------------------------------------------------- */ 1412 1413 /* 1414 * vnode operations vector used for files stored in a tmpfs file system. 1415 */ 1416 struct vop_vector tmpfs_vnodeop_entries = { 1417 .vop_default = &default_vnodeops, 1418 .vop_lookup = vfs_cache_lookup, 1419 .vop_cachedlookup = tmpfs_lookup, 1420 .vop_create = tmpfs_create, 1421 .vop_mknod = tmpfs_mknod, 1422 .vop_open = tmpfs_open, 1423 .vop_close = tmpfs_close, 1424 .vop_access = tmpfs_access, 1425 .vop_getattr = tmpfs_getattr, 1426 .vop_setattr = tmpfs_setattr, 1427 .vop_read = tmpfs_read, 1428 .vop_write = tmpfs_write, 1429 .vop_fsync = tmpfs_fsync, 1430 .vop_remove = tmpfs_remove, 1431 .vop_link = tmpfs_link, 1432 .vop_rename = tmpfs_rename, 1433 .vop_mkdir = tmpfs_mkdir, 1434 .vop_rmdir = tmpfs_rmdir, 1435 .vop_symlink = tmpfs_symlink, 1436 .vop_readdir = tmpfs_readdir, 1437 .vop_readlink = tmpfs_readlink, 1438 .vop_inactive = tmpfs_inactive, 1439 .vop_reclaim = tmpfs_reclaim, 1440 .vop_print = tmpfs_print, 1441 .vop_pathconf = tmpfs_pathconf, 1442 .vop_vptofh = tmpfs_vptofh, 1443 .vop_bmap = VOP_EOPNOTSUPP, 1444 }; 1445 1446