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