1 /* $NetBSD: tmpfs_vnops.c,v 1.35 2007/01/04 15:42:37 elad Exp $ */ 2 3 /* 4 * Copyright (c) 2005 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * tmpfs vnode interface. 42 */ 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 #include <sys/param.h> 47 #include <sys/fcntl.h> 48 #include <sys/lockf.h> 49 #include <sys/namei.h> 50 #include <sys/priv.h> 51 #include <sys/proc.h> 52 #include <sys/resourcevar.h> 53 #include <sys/stat.h> 54 #include <sys/systm.h> 55 #include <sys/unistd.h> 56 #include <sys/vnode.h> 57 58 #include <vm/vm.h> 59 #include <vm/vm_object.h> 60 #include <vm/vm_page.h> 61 #include <vm/vm_pager.h> 62 #include <sys/sched.h> 63 #include <sys/sf_buf.h> 64 #include <machine/_inttypes.h> 65 66 #include <fs/fifofs/fifo.h> 67 #include <fs/tmpfs/tmpfs_vnops.h> 68 #include <fs/tmpfs/tmpfs.h> 69 70 /* --------------------------------------------------------------------- */ 71 72 static int 73 tmpfs_lookup(struct vop_cachedlookup_args *v) 74 { 75 struct vnode *dvp = v->a_dvp; 76 struct vnode **vpp = v->a_vpp; 77 struct componentname *cnp = v->a_cnp; 78 struct thread *td = cnp->cn_thread; 79 80 int error; 81 struct tmpfs_dirent *de; 82 struct tmpfs_node *dnode; 83 84 dnode = VP_TO_TMPFS_DIR(dvp); 85 *vpp = NULLVP; 86 87 /* Check accessibility of requested node as a first step. */ 88 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td); 89 if (error != 0) 90 goto out; 91 92 /* We cannot be requesting the parent directory of the root node. */ 93 MPASS(IMPLIES(dnode->tn_type == VDIR && 94 dnode->tn_dir.tn_parent == dnode, 95 !(cnp->cn_flags & ISDOTDOT))); 96 97 if (cnp->cn_flags & ISDOTDOT) { 98 VOP_UNLOCK(dvp, 0, td); 99 100 /* Allocate a new vnode on the matching entry. */ 101 error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, vpp, td); 102 103 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 104 105 dnode->tn_dir.tn_parent->tn_lookup_dirent = NULL; 106 } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 107 VREF(dvp); 108 *vpp = dvp; 109 dnode->tn_lookup_dirent = NULL; 110 error = 0; 111 } else { 112 de = tmpfs_dir_lookup(dnode, cnp); 113 if (de == NULL) { 114 /* The entry was not found in the directory. 115 * This is OK if we are creating or renaming an 116 * entry and are working on the last component of 117 * the path name. */ 118 if ((cnp->cn_flags & ISLASTCN) && 119 (cnp->cn_nameiop == CREATE || \ 120 cnp->cn_nameiop == RENAME)) { 121 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 122 cnp->cn_thread); 123 if (error != 0) 124 goto out; 125 126 /* Keep the component name in the buffer for 127 * future uses. */ 128 cnp->cn_flags |= SAVENAME; 129 130 error = EJUSTRETURN; 131 } else 132 error = ENOENT; 133 } else { 134 struct tmpfs_node *tnode; 135 136 /* The entry was found, so get its associated 137 * tmpfs_node. */ 138 tnode = de->td_node; 139 140 /* If we are not at the last path component and 141 * found a non-directory or non-link entry (which 142 * may itself be pointing to a directory), raise 143 * an error. */ 144 if ((tnode->tn_type != VDIR && 145 tnode->tn_type != VLNK) && 146 !(cnp->cn_flags & ISLASTCN)) { 147 error = ENOTDIR; 148 goto out; 149 } 150 151 /* If we are deleting or renaming the entry, keep 152 * track of its tmpfs_dirent so that it can be 153 * easily deleted later. */ 154 if ((cnp->cn_flags & ISLASTCN) && 155 (cnp->cn_nameiop == DELETE || 156 cnp->cn_nameiop == RENAME)) { 157 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 158 cnp->cn_thread); 159 if (error != 0) 160 goto out; 161 162 /* Allocate a new vnode on the matching entry. */ 163 error = tmpfs_alloc_vp(dvp->v_mount, tnode, vpp, td); 164 if (error != 0) 165 goto out; 166 167 if ((dnode->tn_mode & S_ISTXT) && 168 VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 169 VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 170 error = EPERM; 171 vput(*vpp); 172 *vpp = NULL; 173 goto out; 174 } 175 tnode->tn_lookup_dirent = de; 176 cnp->cn_flags |= SAVENAME; 177 } 178 else 179 error = tmpfs_alloc_vp(dvp->v_mount, tnode, vpp, td); 180 181 } 182 } 183 184 /* Store the result of this lookup in the cache. Avoid this if the 185 * request was for creation, as it does not improve timings on 186 * emprical tests. */ 187 if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 188 cache_enter(dvp, *vpp, cnp); 189 190 out: 191 /* If there were no errors, *vpp cannot be null and it must be 192 * locked. */ 193 MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp, td))); 194 195 return error; 196 } 197 198 /* --------------------------------------------------------------------- */ 199 200 static int 201 tmpfs_create(struct vop_create_args *v) 202 { 203 struct vnode *dvp = v->a_dvp; 204 struct vnode **vpp = v->a_vpp; 205 struct componentname *cnp = v->a_cnp; 206 struct vattr *vap = v->a_vap; 207 208 MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 209 210 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 211 } 212 /* --------------------------------------------------------------------- */ 213 214 static int 215 tmpfs_mknod(struct vop_mknod_args *v) 216 { 217 struct vnode *dvp = v->a_dvp; 218 struct vnode **vpp = v->a_vpp; 219 struct componentname *cnp = v->a_cnp; 220 struct vattr *vap = v->a_vap; 221 222 if (vap->va_type != VBLK && vap->va_type != VCHR && 223 vap->va_type != VFIFO) 224 return EINVAL; 225 226 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 227 } 228 229 /* --------------------------------------------------------------------- */ 230 231 static int 232 tmpfs_open(struct vop_open_args *v) 233 { 234 struct vnode *vp = v->a_vp; 235 int mode = v->a_mode; 236 237 int error; 238 struct tmpfs_node *node; 239 240 MPASS(VOP_ISLOCKED(vp, v->a_td)); 241 242 node = VP_TO_TMPFS_NODE(vp); 243 244 /* The file is still active but all its names have been removed 245 * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 246 * it is about to die. */ 247 if (node->tn_links < 1) 248 return (ENOENT); 249 250 /* If the file is marked append-only, deny write requests. */ 251 if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 252 error = EPERM; 253 else { 254 error = 0; 255 vnode_create_vobject(vp, node->tn_size, v->a_td); 256 } 257 258 MPASS(VOP_ISLOCKED(vp, v->a_td)); 259 return error; 260 } 261 262 /* --------------------------------------------------------------------- */ 263 264 static int 265 tmpfs_close(struct vop_close_args *v) 266 { 267 struct vnode *vp = v->a_vp; 268 269 struct tmpfs_node *node; 270 271 MPASS(VOP_ISLOCKED(vp, v->a_td)); 272 273 node = VP_TO_TMPFS_NODE(vp); 274 275 if (node->tn_links > 0) { 276 /* Update node times. No need to do it if the node has 277 * been deleted, because it will vanish after we return. */ 278 tmpfs_update(vp); 279 } 280 281 return 0; 282 } 283 284 /* --------------------------------------------------------------------- */ 285 286 int 287 tmpfs_access(struct vop_access_args *v) 288 { 289 struct vnode *vp = v->a_vp; 290 int mode = v->a_mode; 291 struct ucred *cred = v->a_cred; 292 293 int error; 294 struct tmpfs_node *node; 295 296 MPASS(VOP_ISLOCKED(vp, v->a_td)); 297 298 node = VP_TO_TMPFS_NODE(vp); 299 300 switch (vp->v_type) { 301 case VDIR: 302 /* FALLTHROUGH */ 303 case VLNK: 304 /* FALLTHROUGH */ 305 case VREG: 306 if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 307 error = EROFS; 308 goto out; 309 } 310 break; 311 312 case VBLK: 313 /* FALLTHROUGH */ 314 case VCHR: 315 /* FALLTHROUGH */ 316 case VSOCK: 317 /* FALLTHROUGH */ 318 case VFIFO: 319 break; 320 321 default: 322 error = EINVAL; 323 goto out; 324 } 325 326 if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 327 error = EPERM; 328 goto out; 329 } 330 331 error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 332 node->tn_gid, mode, cred, NULL); 333 334 out: 335 MPASS(VOP_ISLOCKED(vp, v->a_td)); 336 337 return error; 338 } 339 340 /* --------------------------------------------------------------------- */ 341 342 int 343 tmpfs_getattr(struct vop_getattr_args *v) 344 { 345 struct vnode *vp = v->a_vp; 346 struct vattr *vap = v->a_vap; 347 348 struct tmpfs_node *node; 349 350 node = VP_TO_TMPFS_NODE(vp); 351 352 VATTR_NULL(vap); 353 354 tmpfs_update(vp); 355 356 vap->va_type = vp->v_type; 357 vap->va_mode = node->tn_mode; 358 vap->va_nlink = node->tn_links; 359 vap->va_uid = node->tn_uid; 360 vap->va_gid = node->tn_gid; 361 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 362 vap->va_fileid = node->tn_id; 363 vap->va_size = node->tn_size; 364 vap->va_blocksize = PAGE_SIZE; 365 vap->va_atime = node->tn_atime; 366 vap->va_mtime = node->tn_mtime; 367 vap->va_ctime = node->tn_ctime; 368 vap->va_birthtime = node->tn_birthtime; 369 vap->va_gen = node->tn_gen; 370 vap->va_flags = node->tn_flags; 371 vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 372 node->tn_rdev : VNOVAL; 373 vap->va_bytes = round_page(node->tn_size); 374 vap->va_filerev = VNOVAL; 375 vap->va_vaflags = 0; 376 vap->va_spare = VNOVAL; /* XXX */ 377 378 return 0; 379 } 380 381 /* --------------------------------------------------------------------- */ 382 383 /* XXX Should this operation be atomic? I think it should, but code in 384 * XXX other places (e.g., ufs) doesn't seem to be... */ 385 int 386 tmpfs_setattr(struct vop_setattr_args *v) 387 { 388 struct vnode *vp = v->a_vp; 389 struct vattr *vap = v->a_vap; 390 struct ucred *cred = v->a_cred; 391 struct thread *l = v->a_td; 392 393 int error; 394 395 MPASS(VOP_ISLOCKED(vp, l)); 396 397 error = 0; 398 399 /* Abort if any unsettable attribute is given. */ 400 if (vap->va_type != VNON || 401 vap->va_nlink != VNOVAL || 402 vap->va_fsid != VNOVAL || 403 vap->va_fileid != VNOVAL || 404 vap->va_blocksize != VNOVAL || 405 vap->va_gen != VNOVAL || 406 vap->va_rdev != VNOVAL || 407 vap->va_bytes != VNOVAL) 408 error = EINVAL; 409 410 if (error == 0 && (vap->va_flags != VNOVAL)) 411 error = tmpfs_chflags(vp, vap->va_flags, cred, l); 412 413 if (error == 0 && (vap->va_size != VNOVAL)) 414 error = tmpfs_chsize(vp, vap->va_size, cred, l); 415 416 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 417 error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, 418 l); 419 420 if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 421 error = tmpfs_chmod(vp, vap->va_mode, cred, l); 422 423 if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 424 vap->va_atime.tv_nsec != VNOVAL) || 425 (vap->va_mtime.tv_sec != VNOVAL && 426 vap->va_mtime.tv_nsec != VNOVAL) || 427 (vap->va_birthtime.tv_sec != VNOVAL && 428 vap->va_birthtime.tv_nsec != VNOVAL))) 429 error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 430 &vap->va_birthtime, vap->va_vaflags, cred, l); 431 432 /* Update the node times. We give preference to the error codes 433 * generated by this function rather than the ones that may arise 434 * from tmpfs_update. */ 435 tmpfs_update(vp); 436 437 MPASS(VOP_ISLOCKED(vp, l)); 438 439 return error; 440 } 441 442 /* --------------------------------------------------------------------- */ 443 444 static int 445 tmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 446 { 447 vm_pindex_t idx; 448 vm_page_t m; 449 struct sf_buf *sf; 450 off_t offset, addr; 451 size_t tlen; 452 caddr_t va; 453 int error; 454 455 addr = uio->uio_offset; 456 idx = OFF_TO_IDX(addr); 457 offset = addr & PAGE_MASK; 458 tlen = MIN(PAGE_SIZE - offset, len); 459 460 if ((vobj == NULL) || (vobj->resident_page_count == 0)) 461 goto nocache; 462 463 VM_OBJECT_LOCK(vobj); 464 lookupvpg: 465 if (((m = vm_page_lookup(vobj, idx)) != NULL) && 466 vm_page_is_valid(m, offset, tlen)) { 467 if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 468 goto lookupvpg; 469 vm_page_busy(m); 470 VM_OBJECT_UNLOCK(vobj); 471 sched_pin(); 472 sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 473 va = (caddr_t)sf_buf_kva(sf); 474 error = uiomove(va + offset, tlen, uio); 475 sf_buf_free(sf); 476 sched_unpin(); 477 VM_OBJECT_LOCK(vobj); 478 vm_page_wakeup(m); 479 VM_OBJECT_UNLOCK(vobj); 480 return (error); 481 } 482 VM_OBJECT_UNLOCK(vobj); 483 nocache: 484 VM_OBJECT_LOCK(tobj); 485 vm_object_pip_add(tobj, 1); 486 m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 487 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 488 if (m->valid != VM_PAGE_BITS_ALL) { 489 int behind, ahead; 490 if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 491 error = vm_pager_get_pages(tobj, &m, 1, 0); 492 if (error != 0) { 493 printf("tmpfs get pages from pager error [read]\n"); 494 goto out; 495 } 496 } else 497 vm_page_zero_invalid(m, TRUE); 498 } 499 VM_OBJECT_UNLOCK(tobj); 500 sched_pin(); 501 sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 502 va = (caddr_t)sf_buf_kva(sf); 503 error = uiomove(va + offset, tlen, uio); 504 sf_buf_free(sf); 505 sched_unpin(); 506 VM_OBJECT_LOCK(tobj); 507 out: 508 vm_page_lock_queues(); 509 vm_page_unwire(m, 0); 510 vm_page_activate(m); 511 vm_page_unlock_queues(); 512 vm_page_wakeup(m); 513 vm_object_pip_subtract(tobj, 1); 514 VM_OBJECT_UNLOCK(tobj); 515 516 return (error); 517 } 518 519 static int 520 tmpfs_read(struct vop_read_args *v) 521 { 522 struct vnode *vp = v->a_vp; 523 struct uio *uio = v->a_uio; 524 525 struct tmpfs_node *node; 526 vm_object_t uobj; 527 size_t len; 528 int resid; 529 530 int error; 531 532 node = VP_TO_TMPFS_NODE(vp); 533 534 if (vp->v_type != VREG) { 535 error = EISDIR; 536 goto out; 537 } 538 539 if (uio->uio_offset < 0) { 540 error = EINVAL; 541 goto out; 542 } 543 544 node->tn_status |= TMPFS_NODE_ACCESSED; 545 546 uobj = node->tn_reg.tn_aobj; 547 while ((resid = uio->uio_resid) > 0) { 548 error = 0; 549 if (node->tn_size <= uio->uio_offset) 550 break; 551 len = MIN(node->tn_size - uio->uio_offset, resid); 552 if (len == 0) 553 break; 554 error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 555 if ((error != 0) || (resid == uio->uio_resid)) 556 break; 557 } 558 559 out: 560 561 return error; 562 } 563 564 /* --------------------------------------------------------------------- */ 565 566 static int 567 tmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 568 { 569 vm_pindex_t idx; 570 vm_page_t vpg, tpg; 571 struct sf_buf *sf; 572 off_t offset, addr; 573 size_t tlen; 574 caddr_t va; 575 int error; 576 577 addr = uio->uio_offset; 578 idx = OFF_TO_IDX(addr); 579 offset = addr & PAGE_MASK; 580 tlen = MIN(PAGE_SIZE - offset, len); 581 582 if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 583 vpg = NULL; 584 goto nocache; 585 } 586 587 VM_OBJECT_LOCK(vobj); 588 lookupvpg: 589 if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 590 vm_page_is_valid(vpg, offset, tlen)) { 591 if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 592 goto lookupvpg; 593 vm_page_busy(vpg); 594 vm_page_lock_queues(); 595 vm_page_undirty(vpg); 596 vm_page_unlock_queues(); 597 VM_OBJECT_UNLOCK(vobj); 598 sched_pin(); 599 sf = sf_buf_alloc(vpg, SFB_CPUPRIVATE); 600 va = (caddr_t)sf_buf_kva(sf); 601 error = uiomove(va + offset, tlen, uio); 602 sf_buf_free(sf); 603 sched_unpin(); 604 } else { 605 VM_OBJECT_UNLOCK(vobj); 606 vpg = NULL; 607 } 608 nocache: 609 VM_OBJECT_LOCK(tobj); 610 vm_object_pip_add(tobj, 1); 611 tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 612 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 613 if (tpg->valid != VM_PAGE_BITS_ALL) { 614 int behind, ahead; 615 if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 616 error = vm_pager_get_pages(tobj, &tpg, 1, 0); 617 if (error != 0) { 618 printf("tmpfs get pages from pager error [write]\n"); 619 goto out; 620 } 621 } else 622 vm_page_zero_invalid(tpg, TRUE); 623 } 624 VM_OBJECT_UNLOCK(tobj); 625 if (vpg == NULL) { 626 sched_pin(); 627 sf = sf_buf_alloc(tpg, SFB_CPUPRIVATE); 628 va = (caddr_t)sf_buf_kva(sf); 629 error = uiomove(va + offset, tlen, uio); 630 sf_buf_free(sf); 631 sched_unpin(); 632 } else { 633 KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 634 pmap_copy_page(vpg, tpg); 635 } 636 VM_OBJECT_LOCK(tobj); 637 out: 638 if (vobj != NULL) 639 VM_OBJECT_LOCK(vobj); 640 vm_page_lock_queues(); 641 if (error == 0) { 642 vm_page_set_validclean(tpg, offset, tlen); 643 vm_page_zero_invalid(tpg, TRUE); 644 vm_page_dirty(tpg); 645 } 646 vm_page_unwire(tpg, 0); 647 vm_page_activate(tpg); 648 vm_page_unlock_queues(); 649 vm_page_wakeup(tpg); 650 if (vpg != NULL) 651 vm_page_wakeup(vpg); 652 if (vobj != NULL) 653 VM_OBJECT_UNLOCK(vobj); 654 vm_object_pip_subtract(tobj, 1); 655 VM_OBJECT_UNLOCK(tobj); 656 657 return (error); 658 } 659 660 static int 661 tmpfs_write(struct vop_write_args *v) 662 { 663 struct vnode *vp = v->a_vp; 664 struct uio *uio = v->a_uio; 665 int ioflag = v->a_ioflag; 666 struct thread *td = uio->uio_td; 667 668 boolean_t extended; 669 int error = 0; 670 off_t oldsize; 671 struct tmpfs_node *node; 672 vm_object_t uobj; 673 size_t len; 674 int resid; 675 676 node = VP_TO_TMPFS_NODE(vp); 677 oldsize = node->tn_size; 678 679 if (uio->uio_offset < 0 || vp->v_type != VREG) { 680 error = EINVAL; 681 goto out; 682 } 683 684 if (uio->uio_resid == 0) { 685 error = 0; 686 goto out; 687 } 688 689 if (ioflag & IO_APPEND) 690 uio->uio_offset = node->tn_size; 691 692 if (uio->uio_offset + uio->uio_resid > 693 VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 694 return (EFBIG); 695 696 if (vp->v_type == VREG && td != NULL) { 697 PROC_LOCK(td->td_proc); 698 if (uio->uio_offset + uio->uio_resid > 699 lim_cur(td->td_proc, RLIMIT_FSIZE)) { 700 psignal(td->td_proc, SIGXFSZ); 701 PROC_UNLOCK(td->td_proc); 702 return (EFBIG); 703 } 704 PROC_UNLOCK(td->td_proc); 705 } 706 707 extended = uio->uio_offset + uio->uio_resid > node->tn_size; 708 if (extended) { 709 error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 710 if (error != 0) 711 goto out; 712 } 713 714 uobj = node->tn_reg.tn_aobj; 715 while ((resid = uio->uio_resid) > 0) { 716 if (node->tn_size <= uio->uio_offset) 717 break; 718 len = MIN(node->tn_size - uio->uio_offset, resid); 719 if (len == 0) 720 break; 721 error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 722 if ((error != 0) || (resid == uio->uio_resid)) 723 break; 724 } 725 726 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 727 (extended ? TMPFS_NODE_CHANGED : 0); 728 729 if (node->tn_mode & (S_ISUID | S_ISGID)) { 730 if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 731 node->tn_mode &= ~(S_ISUID | S_ISGID); 732 } 733 734 if (error != 0) 735 (void)tmpfs_reg_resize(vp, oldsize); 736 737 out: 738 MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 739 MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 740 741 return error; 742 } 743 744 /* --------------------------------------------------------------------- */ 745 746 static int 747 tmpfs_fsync(struct vop_fsync_args *v) 748 { 749 struct vnode *vp = v->a_vp; 750 751 MPASS(VOP_ISLOCKED(vp, v->a_td)); 752 753 tmpfs_update(vp); 754 755 return 0; 756 } 757 758 /* --------------------------------------------------------------------- */ 759 760 static int 761 tmpfs_remove(struct vop_remove_args *v) 762 { 763 struct vnode *dvp = v->a_dvp; 764 struct vnode *vp = v->a_vp; 765 766 int error; 767 struct tmpfs_dirent *de; 768 struct tmpfs_mount *tmp; 769 struct tmpfs_node *dnode; 770 struct tmpfs_node *node; 771 772 MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 773 MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 774 775 if (vp->v_type == VDIR) { 776 error = EISDIR; 777 goto out; 778 } 779 780 dnode = VP_TO_TMPFS_DIR(dvp); 781 node = VP_TO_TMPFS_NODE(vp); 782 tmp = VFS_TO_TMPFS(vp->v_mount); 783 de = node->tn_lookup_dirent; 784 MPASS(de != NULL); 785 786 /* Files marked as immutable or append-only cannot be deleted. */ 787 if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 788 (dnode->tn_flags & APPEND)) { 789 error = EPERM; 790 goto out; 791 } 792 793 /* Remove the entry from the directory; as it is a file, we do not 794 * have to change the number of hard links of the directory. */ 795 tmpfs_dir_detach(dvp, de); 796 797 /* Free the directory entry we just deleted. Note that the node 798 * referred by it will not be removed until the vnode is really 799 * reclaimed. */ 800 tmpfs_free_dirent(tmp, de, TRUE); 801 802 if (node->tn_links > 0) 803 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 804 TMPFS_NODE_MODIFIED; 805 error = 0; 806 807 out: 808 809 return error; 810 } 811 812 /* --------------------------------------------------------------------- */ 813 814 static int 815 tmpfs_link(struct vop_link_args *v) 816 { 817 struct vnode *dvp = v->a_tdvp; 818 struct vnode *vp = v->a_vp; 819 struct componentname *cnp = v->a_cnp; 820 821 int error; 822 struct tmpfs_dirent *de; 823 struct tmpfs_node *node; 824 825 MPASS(VOP_ISLOCKED(dvp, cnp->cn_thread)); 826 MPASS(cnp->cn_flags & HASBUF); 827 MPASS(dvp != vp); /* XXX When can this be false? */ 828 829 node = VP_TO_TMPFS_NODE(vp); 830 831 /* XXX: Why aren't the following two tests done by the caller? */ 832 833 /* Hard links of directories are forbidden. */ 834 if (vp->v_type == VDIR) { 835 error = EPERM; 836 goto out; 837 } 838 839 /* Cannot create cross-device links. */ 840 if (dvp->v_mount != vp->v_mount) { 841 error = EXDEV; 842 goto out; 843 } 844 845 /* Ensure that we do not overflow the maximum number of links imposed 846 * by the system. */ 847 MPASS(node->tn_links <= LINK_MAX); 848 if (node->tn_links == LINK_MAX) { 849 error = EMLINK; 850 goto out; 851 } 852 853 /* We cannot create links of files marked immutable or append-only. */ 854 if (node->tn_flags & (IMMUTABLE | APPEND)) { 855 error = EPERM; 856 goto out; 857 } 858 859 /* Allocate a new directory entry to represent the node. */ 860 error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 861 cnp->cn_nameptr, cnp->cn_namelen, &de); 862 if (error != 0) 863 goto out; 864 865 /* Insert the new directory entry into the appropriate directory. */ 866 tmpfs_dir_attach(dvp, de); 867 868 /* vp link count has changed, so update node times. */ 869 node->tn_status |= TMPFS_NODE_CHANGED; 870 tmpfs_update(vp); 871 872 error = 0; 873 874 out: 875 return error; 876 } 877 878 /* --------------------------------------------------------------------- */ 879 880 static int 881 tmpfs_rename(struct vop_rename_args *v) 882 { 883 struct vnode *fdvp = v->a_fdvp; 884 struct vnode *fvp = v->a_fvp; 885 struct componentname *fcnp = v->a_fcnp; 886 struct vnode *tdvp = v->a_tdvp; 887 struct vnode *tvp = v->a_tvp; 888 struct componentname *tcnp = v->a_tcnp; 889 struct tmpfs_node *tnode = 0; /* pacify gcc */ 890 891 char *newname; 892 int error; 893 struct tmpfs_dirent *de; 894 struct tmpfs_node *fdnode; 895 struct tmpfs_node *fnode; 896 struct tmpfs_node *tdnode; 897 898 MPASS(VOP_ISLOCKED(tdvp, tcnp->cn_thread)); 899 MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp, tcnp->cn_thread))); 900 MPASS(fcnp->cn_flags & HASBUF); 901 MPASS(tcnp->cn_flags & HASBUF); 902 903 fdnode = VP_TO_TMPFS_DIR(fdvp); 904 fnode = VP_TO_TMPFS_NODE(fvp); 905 de = fnode->tn_lookup_dirent; 906 907 /* Disallow cross-device renames. 908 * XXX Why isn't this done by the caller? */ 909 if (fvp->v_mount != tdvp->v_mount || 910 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 911 error = EXDEV; 912 goto out; 913 } 914 915 tdnode = VP_TO_TMPFS_DIR(tdvp); 916 917 /* If source and target are the same file, there is nothing to do. */ 918 if (fvp == tvp) { 919 error = 0; 920 goto out; 921 } 922 923 /* Avoid manipulating '.' and '..' entries. */ 924 if (de == NULL) { 925 MPASS(fvp->v_type == VDIR); 926 error = EINVAL; 927 goto out; 928 } 929 MPASS(de->td_node == fnode); 930 931 /* If re-naming a directory to another preexisting directory 932 * ensure that the target directory is empty so that its 933 * removal causes no side effects. 934 * Kern_rename gurantees the destination to be a directory 935 * if the source is one. */ 936 if (tvp != NULL) { 937 tnode = VP_TO_TMPFS_NODE(tvp); 938 939 if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 940 (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 941 error = EPERM; 942 goto out; 943 } 944 945 if ((de->td_node->tn_type == VDIR) && (tnode->tn_size > 0)) { 946 error = ENOTEMPTY; 947 goto out; 948 } 949 } 950 951 /* If we need to move the directory between entries, lock the 952 * source so that we can safely operate on it. */ 953 if (fdnode != tdnode) { 954 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY, tcnp->cn_thread); 955 if (error != 0) 956 goto out; 957 } 958 959 if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 960 || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 961 error = EPERM; 962 goto out_locked; 963 } 964 965 /* Ensure that we have enough memory to hold the new name, if it 966 * has to be changed. */ 967 if (fcnp->cn_namelen != tcnp->cn_namelen || 968 memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 969 newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 970 } else 971 newname = NULL; 972 973 /* If the node is being moved to another directory, we have to do 974 * the move. */ 975 if (fdnode != tdnode) { 976 /* In case we are moving a directory, we have to adjust its 977 * parent to point to the new parent. */ 978 if (de->td_node->tn_type == VDIR) { 979 struct tmpfs_node *n; 980 981 /* Ensure the target directory is not a child of the 982 * directory being moved. Otherwise, we'd end up 983 * with stale nodes. */ 984 n = tdnode; 985 while (n != n->tn_dir.tn_parent) { 986 if (n == fnode) { 987 error = EINVAL; 988 if (newname != NULL) 989 free(newname, M_TMPFSNAME); 990 goto out_locked; 991 } 992 n = n->tn_dir.tn_parent; 993 } 994 995 /* Adjust the parent pointer. */ 996 TMPFS_VALIDATE_DIR(fnode); 997 de->td_node->tn_dir.tn_parent = tdnode; 998 999 /* As a result of changing the target of the '..' 1000 * entry, the link count of the source and target 1001 * directories has to be adjusted. */ 1002 fdnode->tn_links--; 1003 tdnode->tn_links++; 1004 } 1005 1006 /* Do the move: just remove the entry from the source directory 1007 * and insert it into the target one. */ 1008 tmpfs_dir_detach(fdvp, de); 1009 tmpfs_dir_attach(tdvp, de); 1010 } 1011 1012 /* If the name has changed, we need to make it effective by changing 1013 * it in the directory entry. */ 1014 if (newname != NULL) { 1015 MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1016 1017 free(de->td_name, M_TMPFSNAME); 1018 de->td_namelen = (uint16_t)tcnp->cn_namelen; 1019 memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1020 de->td_name = newname; 1021 1022 fnode->tn_status |= TMPFS_NODE_CHANGED; 1023 tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1024 } 1025 1026 /* If we are overwriting an entry, we have to remove the old one 1027 * from the target directory. */ 1028 if (tvp != NULL) { 1029 /* Remove the old entry from the target directory. */ 1030 de = tnode->tn_lookup_dirent; 1031 tmpfs_dir_detach(tdvp, de); 1032 1033 /* Free the directory entry we just deleted. Note that the 1034 * node referred by it will not be removed until the vnode is 1035 * really reclaimed. */ 1036 tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1037 } 1038 1039 error = 0; 1040 1041 out_locked: 1042 if (fdnode != tdnode) 1043 VOP_UNLOCK(fdvp, 0, tcnp->cn_thread); 1044 1045 out: 1046 /* Release target nodes. */ 1047 /* XXX: I don't understand when tdvp can be the same as tvp, but 1048 * other code takes care of this... */ 1049 if (tdvp == tvp) 1050 vrele(tdvp); 1051 else 1052 vput(tdvp); 1053 if (tvp != NULL) 1054 vput(tvp); 1055 1056 /* Release source nodes. */ 1057 vrele(fdvp); 1058 vrele(fvp); 1059 1060 return error; 1061 } 1062 1063 /* --------------------------------------------------------------------- */ 1064 1065 static int 1066 tmpfs_mkdir(struct vop_mkdir_args *v) 1067 { 1068 struct vnode *dvp = v->a_dvp; 1069 struct vnode **vpp = v->a_vpp; 1070 struct componentname *cnp = v->a_cnp; 1071 struct vattr *vap = v->a_vap; 1072 1073 MPASS(vap->va_type == VDIR); 1074 1075 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1076 } 1077 1078 /* --------------------------------------------------------------------- */ 1079 1080 static int 1081 tmpfs_rmdir(struct vop_rmdir_args *v) 1082 { 1083 struct vnode *dvp = v->a_dvp; 1084 struct vnode *vp = v->a_vp; 1085 1086 int error; 1087 struct tmpfs_dirent *de; 1088 struct tmpfs_mount *tmp; 1089 struct tmpfs_node *dnode; 1090 struct tmpfs_node *node; 1091 1092 MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 1093 MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 1094 1095 tmp = VFS_TO_TMPFS(dvp->v_mount); 1096 dnode = VP_TO_TMPFS_DIR(dvp); 1097 node = VP_TO_TMPFS_DIR(vp); 1098 1099 /* Directories with more than two entries ('.' and '..') cannot be 1100 * removed. */ 1101 if (node->tn_size > 0) { 1102 error = ENOTEMPTY; 1103 goto out; 1104 } 1105 1106 if ((dnode->tn_flags & APPEND) 1107 || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1108 error = EPERM; 1109 goto out; 1110 } 1111 1112 /* This invariant holds only if we are not trying to remove "..". 1113 * We checked for that above so this is safe now. */ 1114 MPASS(node->tn_dir.tn_parent == dnode); 1115 1116 /* Get the directory entry associated with node (vp). This was 1117 * filled by tmpfs_lookup while looking up the entry. */ 1118 de = node->tn_lookup_dirent; 1119 MPASS(TMPFS_DIRENT_MATCHES(de, 1120 v->a_cnp->cn_nameptr, 1121 v->a_cnp->cn_namelen)); 1122 1123 /* Check flags to see if we are allowed to remove the directory. */ 1124 if (dnode->tn_flags & APPEND 1125 || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1126 error = EPERM; 1127 goto out; 1128 } 1129 1130 /* Detach the directory entry from the directory (dnode). */ 1131 tmpfs_dir_detach(dvp, de); 1132 1133 node->tn_links--; 1134 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1135 TMPFS_NODE_MODIFIED; 1136 node->tn_dir.tn_parent->tn_links--; 1137 node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1138 TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1139 1140 cache_purge(dvp); 1141 cache_purge(vp); 1142 1143 /* Free the directory entry we just deleted. Note that the node 1144 * referred by it will not be removed until the vnode is really 1145 * reclaimed. */ 1146 tmpfs_free_dirent(tmp, de, TRUE); 1147 1148 /* Release the deleted vnode (will destroy the node, notify 1149 * interested parties and clean it from the cache). */ 1150 1151 dnode->tn_status |= TMPFS_NODE_CHANGED; 1152 tmpfs_update(dvp); 1153 1154 error = 0; 1155 1156 out: 1157 return error; 1158 } 1159 1160 /* --------------------------------------------------------------------- */ 1161 1162 static int 1163 tmpfs_symlink(struct vop_symlink_args *v) 1164 { 1165 struct vnode *dvp = v->a_dvp; 1166 struct vnode **vpp = v->a_vpp; 1167 struct componentname *cnp = v->a_cnp; 1168 struct vattr *vap = v->a_vap; 1169 char *target = v->a_target; 1170 1171 #ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1172 MPASS(vap->va_type == VLNK); 1173 #else 1174 vap->va_type = VLNK; 1175 #endif 1176 1177 return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1178 } 1179 1180 /* --------------------------------------------------------------------- */ 1181 1182 static int 1183 tmpfs_readdir(struct vop_readdir_args *v) 1184 { 1185 struct vnode *vp = v->a_vp; 1186 struct uio *uio = v->a_uio; 1187 int *eofflag = v->a_eofflag; 1188 u_long **cookies = v->a_cookies; 1189 int *ncookies = v->a_ncookies; 1190 1191 int error; 1192 off_t startoff; 1193 off_t cnt; 1194 struct tmpfs_node *node; 1195 1196 /* This operation only makes sense on directory nodes. */ 1197 if (vp->v_type != VDIR) { 1198 error = ENOTDIR; 1199 goto out; 1200 } 1201 1202 node = VP_TO_TMPFS_DIR(vp); 1203 1204 startoff = uio->uio_offset; 1205 1206 cnt = 0; 1207 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1208 error = tmpfs_dir_getdotdent(node, uio); 1209 if (error == -1) { 1210 error = 0; 1211 goto outok; 1212 } else if (error != 0) 1213 goto outok; 1214 cnt++; 1215 } 1216 1217 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1218 error = tmpfs_dir_getdotdotdent(node, uio); 1219 if (error == -1) { 1220 error = 0; 1221 goto outok; 1222 } else if (error != 0) 1223 goto outok; 1224 cnt++; 1225 } 1226 1227 error = tmpfs_dir_getdents(node, uio, &cnt); 1228 if (error == -1) 1229 error = 0; 1230 MPASS(error >= 0); 1231 1232 outok: 1233 /* This label assumes that startoff has been 1234 * initialized. If the compiler didn't spit out warnings, we'd 1235 * simply make this one be 'out' and drop 'outok'. */ 1236 1237 if (eofflag != NULL) 1238 *eofflag = 1239 (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1240 1241 /* Update NFS-related variables. */ 1242 if (error == 0 && cookies != NULL && ncookies != NULL) { 1243 off_t i; 1244 off_t off = startoff; 1245 struct tmpfs_dirent *de = NULL; 1246 1247 *ncookies = cnt; 1248 *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1249 1250 for (i = 0; i < cnt; i++) { 1251 MPASS(off != TMPFS_DIRCOOKIE_EOF); 1252 if (off == TMPFS_DIRCOOKIE_DOT) { 1253 off = TMPFS_DIRCOOKIE_DOTDOT; 1254 } else { 1255 if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1256 de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1257 } else if (de != NULL) { 1258 de = TAILQ_NEXT(de, td_entries); 1259 } else { 1260 de = tmpfs_dir_lookupbycookie(node, 1261 off); 1262 MPASS(de != NULL); 1263 de = TAILQ_NEXT(de, td_entries); 1264 } 1265 if (de == NULL) { 1266 off = TMPFS_DIRCOOKIE_EOF; 1267 } else { 1268 off = TMPFS_DIRCOOKIE(de); 1269 } 1270 } 1271 1272 (*cookies)[i] = off; 1273 } 1274 MPASS(uio->uio_offset == off); 1275 } 1276 1277 out: 1278 return error; 1279 } 1280 1281 /* --------------------------------------------------------------------- */ 1282 1283 static int 1284 tmpfs_readlink(struct vop_readlink_args *v) 1285 { 1286 struct vnode *vp = v->a_vp; 1287 struct uio *uio = v->a_uio; 1288 1289 int error; 1290 struct tmpfs_node *node; 1291 1292 MPASS(uio->uio_offset == 0); 1293 MPASS(vp->v_type == VLNK); 1294 1295 node = VP_TO_TMPFS_NODE(vp); 1296 1297 error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1298 uio); 1299 node->tn_status |= TMPFS_NODE_ACCESSED; 1300 1301 return error; 1302 } 1303 1304 /* --------------------------------------------------------------------- */ 1305 1306 static int 1307 tmpfs_inactive(struct vop_inactive_args *v) 1308 { 1309 struct vnode *vp = v->a_vp; 1310 struct thread *l = v->a_td; 1311 1312 struct tmpfs_node *node; 1313 1314 MPASS(VOP_ISLOCKED(vp, l)); 1315 1316 node = VP_TO_TMPFS_NODE(vp); 1317 1318 if (node->tn_links == 0) 1319 vrecycle(vp, l); 1320 1321 return 0; 1322 } 1323 1324 /* --------------------------------------------------------------------- */ 1325 1326 int 1327 tmpfs_reclaim(struct vop_reclaim_args *v) 1328 { 1329 struct vnode *vp = v->a_vp; 1330 1331 struct tmpfs_mount *tmp; 1332 struct tmpfs_node *node; 1333 1334 node = VP_TO_TMPFS_NODE(vp); 1335 tmp = VFS_TO_TMPFS(vp->v_mount); 1336 1337 vnode_destroy_vobject(vp); 1338 cache_purge(vp); 1339 tmpfs_free_vp(vp); 1340 1341 /* If the node referenced by this vnode was deleted by the user, 1342 * we must free its associated data structures (now that the vnode 1343 * is being reclaimed). */ 1344 if (node->tn_links == 0) 1345 tmpfs_free_node(tmp, node); 1346 1347 MPASS(vp->v_data == NULL); 1348 return 0; 1349 } 1350 1351 /* --------------------------------------------------------------------- */ 1352 1353 static int 1354 tmpfs_print(struct vop_print_args *v) 1355 { 1356 struct vnode *vp = v->a_vp; 1357 1358 struct tmpfs_node *node; 1359 1360 node = VP_TO_TMPFS_NODE(vp); 1361 1362 printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1363 node, node->tn_flags, node->tn_links); 1364 printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1365 ", status 0x%x\n", 1366 node->tn_mode, node->tn_uid, node->tn_gid, 1367 (uintmax_t)node->tn_size, node->tn_status); 1368 1369 if (vp->v_type == VFIFO) 1370 fifo_printinfo(vp); 1371 1372 printf("\n"); 1373 1374 return 0; 1375 } 1376 1377 /* --------------------------------------------------------------------- */ 1378 1379 static int 1380 tmpfs_pathconf(struct vop_pathconf_args *v) 1381 { 1382 int name = v->a_name; 1383 register_t *retval = v->a_retval; 1384 1385 int error; 1386 1387 error = 0; 1388 1389 switch (name) { 1390 case _PC_LINK_MAX: 1391 *retval = LINK_MAX; 1392 break; 1393 1394 case _PC_NAME_MAX: 1395 *retval = NAME_MAX; 1396 break; 1397 1398 case _PC_PATH_MAX: 1399 *retval = PATH_MAX; 1400 break; 1401 1402 case _PC_PIPE_BUF: 1403 *retval = PIPE_BUF; 1404 break; 1405 1406 case _PC_CHOWN_RESTRICTED: 1407 *retval = 1; 1408 break; 1409 1410 case _PC_NO_TRUNC: 1411 *retval = 1; 1412 break; 1413 1414 case _PC_SYNC_IO: 1415 *retval = 1; 1416 break; 1417 1418 case _PC_FILESIZEBITS: 1419 *retval = 0; /* XXX Don't know which value should I return. */ 1420 break; 1421 1422 default: 1423 error = EINVAL; 1424 } 1425 1426 return error; 1427 } 1428 1429 /* --------------------------------------------------------------------- */ 1430 1431 static int 1432 tmpfs_advlock(struct vop_advlock_args *v) 1433 { 1434 struct vnode *vp = v->a_vp; 1435 1436 struct tmpfs_node *node; 1437 1438 node = VP_TO_TMPFS_NODE(vp); 1439 1440 return lf_advlock(v, &node->tn_lockf, node->tn_size); 1441 } 1442 1443 /* --------------------------------------------------------------------- */ 1444 1445 static int 1446 tmpfs_vptofh(struct vop_vptofh_args *ap) 1447 { 1448 struct tmpfs_fid *tfhp; 1449 struct tmpfs_node *node; 1450 1451 tfhp = (struct tmpfs_fid *)ap->a_fhp; 1452 node = VP_TO_TMPFS_NODE(ap->a_vp); 1453 1454 tfhp->tf_len = sizeof(struct tmpfs_fid); 1455 tfhp->tf_id = node->tn_id; 1456 tfhp->tf_gen = node->tn_gen; 1457 1458 return (0); 1459 } 1460 1461 /* --------------------------------------------------------------------- */ 1462 1463 /* 1464 * vnode operations vector used for files stored in a tmpfs file system. 1465 */ 1466 struct vop_vector tmpfs_vnodeop_entries = { 1467 .vop_default = &default_vnodeops, 1468 .vop_lookup = vfs_cache_lookup, 1469 .vop_cachedlookup = tmpfs_lookup, 1470 .vop_create = tmpfs_create, 1471 .vop_mknod = tmpfs_mknod, 1472 .vop_open = tmpfs_open, 1473 .vop_close = tmpfs_close, 1474 .vop_access = tmpfs_access, 1475 .vop_getattr = tmpfs_getattr, 1476 .vop_setattr = tmpfs_setattr, 1477 .vop_read = tmpfs_read, 1478 .vop_write = tmpfs_write, 1479 .vop_fsync = tmpfs_fsync, 1480 .vop_remove = tmpfs_remove, 1481 .vop_link = tmpfs_link, 1482 .vop_rename = tmpfs_rename, 1483 .vop_mkdir = tmpfs_mkdir, 1484 .vop_rmdir = tmpfs_rmdir, 1485 .vop_symlink = tmpfs_symlink, 1486 .vop_readdir = tmpfs_readdir, 1487 .vop_readlink = tmpfs_readlink, 1488 .vop_inactive = tmpfs_inactive, 1489 .vop_reclaim = tmpfs_reclaim, 1490 .vop_print = tmpfs_print, 1491 .vop_pathconf = tmpfs_pathconf, 1492 .vop_advlock = tmpfs_advlock, 1493 .vop_vptofh = tmpfs_vptofh, 1494 .vop_bmap = VOP_EOPNOTSUPP, 1495 }; 1496 1497