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 * 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 int ltype = 0; 99 100 ltype = VOP_ISLOCKED(dvp, td); 101 vhold(dvp); 102 VOP_UNLOCK(dvp, 0, td); 103 /* Allocate a new vnode on the matching entry. */ 104 error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, 105 cnp->cn_lkflags, vpp, td); 106 107 vn_lock(dvp, ltype | LK_RETRY, td); 108 vdrop(dvp); 109 110 dnode->tn_dir.tn_parent->tn_lookup_dirent = NULL; 111 } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 112 VREF(dvp); 113 *vpp = dvp; 114 dnode->tn_lookup_dirent = NULL; 115 error = 0; 116 } else { 117 de = tmpfs_dir_lookup(dnode, cnp); 118 if (de == NULL) { 119 /* The entry was not found in the directory. 120 * This is OK if we are creating or renaming an 121 * entry and are working on the last component of 122 * the path name. */ 123 if ((cnp->cn_flags & ISLASTCN) && 124 (cnp->cn_nameiop == CREATE || \ 125 cnp->cn_nameiop == RENAME)) { 126 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 127 cnp->cn_thread); 128 if (error != 0) 129 goto out; 130 131 /* Keep the component name in the buffer for 132 * future uses. */ 133 cnp->cn_flags |= SAVENAME; 134 135 error = EJUSTRETURN; 136 } else 137 error = ENOENT; 138 } else { 139 struct tmpfs_node *tnode; 140 141 /* The entry was found, so get its associated 142 * tmpfs_node. */ 143 tnode = de->td_node; 144 145 /* If we are not at the last path component and 146 * found a non-directory or non-link entry (which 147 * may itself be pointing to a directory), raise 148 * an error. */ 149 if ((tnode->tn_type != VDIR && 150 tnode->tn_type != VLNK) && 151 !(cnp->cn_flags & ISLASTCN)) { 152 error = ENOTDIR; 153 goto out; 154 } 155 156 /* If we are deleting or renaming the entry, keep 157 * track of its tmpfs_dirent so that it can be 158 * easily deleted later. */ 159 if ((cnp->cn_flags & ISLASTCN) && 160 (cnp->cn_nameiop == DELETE || 161 cnp->cn_nameiop == RENAME)) { 162 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 163 cnp->cn_thread); 164 if (error != 0) 165 goto out; 166 167 /* Allocate a new vnode on the matching entry. */ 168 error = tmpfs_alloc_vp(dvp->v_mount, tnode, 169 cnp->cn_lkflags, vpp, td); 170 if (error != 0) 171 goto out; 172 173 if ((dnode->tn_mode & S_ISTXT) && 174 VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 175 VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 176 error = EPERM; 177 vput(*vpp); 178 *vpp = NULL; 179 goto out; 180 } 181 tnode->tn_lookup_dirent = de; 182 cnp->cn_flags |= SAVENAME; 183 } else { 184 error = tmpfs_alloc_vp(dvp->v_mount, tnode, 185 cnp->cn_lkflags, vpp, td); 186 } 187 } 188 } 189 190 /* Store the result of this lookup in the cache. Avoid this if the 191 * request was for creation, as it does not improve timings on 192 * emprical tests. */ 193 if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 194 cache_enter(dvp, *vpp, cnp); 195 196 out: 197 /* If there were no errors, *vpp cannot be null and it must be 198 * locked. */ 199 MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp, td))); 200 201 return error; 202 } 203 204 /* --------------------------------------------------------------------- */ 205 206 static int 207 tmpfs_create(struct vop_create_args *v) 208 { 209 struct vnode *dvp = v->a_dvp; 210 struct vnode **vpp = v->a_vpp; 211 struct componentname *cnp = v->a_cnp; 212 struct vattr *vap = v->a_vap; 213 214 MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 215 216 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 217 } 218 /* --------------------------------------------------------------------- */ 219 220 static int 221 tmpfs_mknod(struct vop_mknod_args *v) 222 { 223 struct vnode *dvp = v->a_dvp; 224 struct vnode **vpp = v->a_vpp; 225 struct componentname *cnp = v->a_cnp; 226 struct vattr *vap = v->a_vap; 227 228 if (vap->va_type != VBLK && vap->va_type != VCHR && 229 vap->va_type != VFIFO) 230 return EINVAL; 231 232 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 233 } 234 235 /* --------------------------------------------------------------------- */ 236 237 static int 238 tmpfs_open(struct vop_open_args *v) 239 { 240 struct vnode *vp = v->a_vp; 241 int mode = v->a_mode; 242 243 int error; 244 struct tmpfs_node *node; 245 246 MPASS(VOP_ISLOCKED(vp, v->a_td)); 247 248 node = VP_TO_TMPFS_NODE(vp); 249 250 /* The file is still active but all its names have been removed 251 * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 252 * it is about to die. */ 253 if (node->tn_links < 1) 254 return (ENOENT); 255 256 /* If the file is marked append-only, deny write requests. */ 257 if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 258 error = EPERM; 259 else { 260 error = 0; 261 vnode_create_vobject(vp, node->tn_size, v->a_td); 262 } 263 264 MPASS(VOP_ISLOCKED(vp, v->a_td)); 265 return error; 266 } 267 268 /* --------------------------------------------------------------------- */ 269 270 static int 271 tmpfs_close(struct vop_close_args *v) 272 { 273 struct vnode *vp = v->a_vp; 274 275 struct tmpfs_node *node; 276 277 MPASS(VOP_ISLOCKED(vp, v->a_td)); 278 279 node = VP_TO_TMPFS_NODE(vp); 280 281 if (node->tn_links > 0) { 282 /* Update node times. No need to do it if the node has 283 * been deleted, because it will vanish after we return. */ 284 tmpfs_update(vp); 285 } 286 287 return 0; 288 } 289 290 /* --------------------------------------------------------------------- */ 291 292 int 293 tmpfs_access(struct vop_access_args *v) 294 { 295 struct vnode *vp = v->a_vp; 296 int mode = v->a_mode; 297 struct ucred *cred = v->a_cred; 298 299 int error; 300 struct tmpfs_node *node; 301 302 MPASS(VOP_ISLOCKED(vp, v->a_td)); 303 304 node = VP_TO_TMPFS_NODE(vp); 305 306 switch (vp->v_type) { 307 case VDIR: 308 /* FALLTHROUGH */ 309 case VLNK: 310 /* FALLTHROUGH */ 311 case VREG: 312 if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 313 error = EROFS; 314 goto out; 315 } 316 break; 317 318 case VBLK: 319 /* FALLTHROUGH */ 320 case VCHR: 321 /* FALLTHROUGH */ 322 case VSOCK: 323 /* FALLTHROUGH */ 324 case VFIFO: 325 break; 326 327 default: 328 error = EINVAL; 329 goto out; 330 } 331 332 if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 333 error = EPERM; 334 goto out; 335 } 336 337 error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 338 node->tn_gid, mode, cred, NULL); 339 340 out: 341 MPASS(VOP_ISLOCKED(vp, v->a_td)); 342 343 return error; 344 } 345 346 /* --------------------------------------------------------------------- */ 347 348 int 349 tmpfs_getattr(struct vop_getattr_args *v) 350 { 351 struct vnode *vp = v->a_vp; 352 struct vattr *vap = v->a_vap; 353 354 struct tmpfs_node *node; 355 356 node = VP_TO_TMPFS_NODE(vp); 357 358 VATTR_NULL(vap); 359 360 tmpfs_update(vp); 361 362 vap->va_type = vp->v_type; 363 vap->va_mode = node->tn_mode; 364 vap->va_nlink = node->tn_links; 365 vap->va_uid = node->tn_uid; 366 vap->va_gid = node->tn_gid; 367 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 368 vap->va_fileid = node->tn_id; 369 vap->va_size = node->tn_size; 370 vap->va_blocksize = PAGE_SIZE; 371 vap->va_atime = node->tn_atime; 372 vap->va_mtime = node->tn_mtime; 373 vap->va_ctime = node->tn_ctime; 374 vap->va_birthtime = node->tn_birthtime; 375 vap->va_gen = node->tn_gen; 376 vap->va_flags = node->tn_flags; 377 vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 378 node->tn_rdev : VNOVAL; 379 vap->va_bytes = round_page(node->tn_size); 380 vap->va_filerev = VNOVAL; 381 vap->va_vaflags = 0; 382 vap->va_spare = VNOVAL; /* XXX */ 383 384 return 0; 385 } 386 387 /* --------------------------------------------------------------------- */ 388 389 /* XXX Should this operation be atomic? I think it should, but code in 390 * XXX other places (e.g., ufs) doesn't seem to be... */ 391 int 392 tmpfs_setattr(struct vop_setattr_args *v) 393 { 394 struct vnode *vp = v->a_vp; 395 struct vattr *vap = v->a_vap; 396 struct ucred *cred = v->a_cred; 397 struct thread *l = v->a_td; 398 399 int error; 400 401 MPASS(VOP_ISLOCKED(vp, l)); 402 403 error = 0; 404 405 /* Abort if any unsettable attribute is given. */ 406 if (vap->va_type != VNON || 407 vap->va_nlink != VNOVAL || 408 vap->va_fsid != VNOVAL || 409 vap->va_fileid != VNOVAL || 410 vap->va_blocksize != VNOVAL || 411 vap->va_gen != VNOVAL || 412 vap->va_rdev != VNOVAL || 413 vap->va_bytes != VNOVAL) 414 error = EINVAL; 415 416 if (error == 0 && (vap->va_flags != VNOVAL)) 417 error = tmpfs_chflags(vp, vap->va_flags, cred, l); 418 419 if (error == 0 && (vap->va_size != VNOVAL)) 420 error = tmpfs_chsize(vp, vap->va_size, cred, l); 421 422 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 423 error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, 424 l); 425 426 if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 427 error = tmpfs_chmod(vp, vap->va_mode, cred, l); 428 429 if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 430 vap->va_atime.tv_nsec != VNOVAL) || 431 (vap->va_mtime.tv_sec != VNOVAL && 432 vap->va_mtime.tv_nsec != VNOVAL) || 433 (vap->va_birthtime.tv_sec != VNOVAL && 434 vap->va_birthtime.tv_nsec != VNOVAL))) 435 error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 436 &vap->va_birthtime, vap->va_vaflags, cred, l); 437 438 /* Update the node times. We give preference to the error codes 439 * generated by this function rather than the ones that may arise 440 * from tmpfs_update. */ 441 tmpfs_update(vp); 442 443 MPASS(VOP_ISLOCKED(vp, l)); 444 445 return error; 446 } 447 448 /* --------------------------------------------------------------------- */ 449 450 static int 451 tmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 452 { 453 vm_pindex_t idx; 454 vm_page_t m; 455 struct sf_buf *sf; 456 off_t offset, addr; 457 size_t tlen; 458 caddr_t va; 459 int error; 460 461 addr = uio->uio_offset; 462 idx = OFF_TO_IDX(addr); 463 offset = addr & PAGE_MASK; 464 tlen = MIN(PAGE_SIZE - offset, len); 465 466 if ((vobj == NULL) || (vobj->resident_page_count == 0)) 467 goto nocache; 468 469 VM_OBJECT_LOCK(vobj); 470 lookupvpg: 471 if (((m = vm_page_lookup(vobj, idx)) != NULL) && 472 vm_page_is_valid(m, offset, tlen)) { 473 if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 474 goto lookupvpg; 475 vm_page_busy(m); 476 VM_OBJECT_UNLOCK(vobj); 477 sched_pin(); 478 sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 479 va = (caddr_t)sf_buf_kva(sf); 480 error = uiomove(va + offset, tlen, uio); 481 sf_buf_free(sf); 482 sched_unpin(); 483 VM_OBJECT_LOCK(vobj); 484 vm_page_wakeup(m); 485 VM_OBJECT_UNLOCK(vobj); 486 return (error); 487 } 488 VM_OBJECT_UNLOCK(vobj); 489 nocache: 490 VM_OBJECT_LOCK(tobj); 491 vm_object_pip_add(tobj, 1); 492 m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 493 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 494 if (m->valid != VM_PAGE_BITS_ALL) { 495 int behind, ahead; 496 if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 497 error = vm_pager_get_pages(tobj, &m, 1, 0); 498 if (error != 0) { 499 printf("tmpfs get pages from pager error [read]\n"); 500 goto out; 501 } 502 } else 503 vm_page_zero_invalid(m, TRUE); 504 } 505 VM_OBJECT_UNLOCK(tobj); 506 sched_pin(); 507 sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 508 va = (caddr_t)sf_buf_kva(sf); 509 error = uiomove(va + offset, tlen, uio); 510 sf_buf_free(sf); 511 sched_unpin(); 512 VM_OBJECT_LOCK(tobj); 513 out: 514 vm_page_lock_queues(); 515 vm_page_unwire(m, 0); 516 vm_page_activate(m); 517 vm_page_unlock_queues(); 518 vm_page_wakeup(m); 519 vm_object_pip_subtract(tobj, 1); 520 VM_OBJECT_UNLOCK(tobj); 521 522 return (error); 523 } 524 525 static int 526 tmpfs_read(struct vop_read_args *v) 527 { 528 struct vnode *vp = v->a_vp; 529 struct uio *uio = v->a_uio; 530 531 struct tmpfs_node *node; 532 vm_object_t uobj; 533 size_t len; 534 int resid; 535 536 int error; 537 538 node = VP_TO_TMPFS_NODE(vp); 539 540 if (vp->v_type != VREG) { 541 error = EISDIR; 542 goto out; 543 } 544 545 if (uio->uio_offset < 0) { 546 error = EINVAL; 547 goto out; 548 } 549 550 node->tn_status |= TMPFS_NODE_ACCESSED; 551 552 uobj = node->tn_reg.tn_aobj; 553 while ((resid = uio->uio_resid) > 0) { 554 error = 0; 555 if (node->tn_size <= uio->uio_offset) 556 break; 557 len = MIN(node->tn_size - uio->uio_offset, resid); 558 if (len == 0) 559 break; 560 error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 561 if ((error != 0) || (resid == uio->uio_resid)) 562 break; 563 } 564 565 out: 566 567 return error; 568 } 569 570 /* --------------------------------------------------------------------- */ 571 572 static int 573 tmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 574 { 575 vm_pindex_t idx; 576 vm_page_t vpg, tpg; 577 struct sf_buf *sf; 578 off_t offset, addr; 579 size_t tlen; 580 caddr_t va; 581 int error; 582 583 addr = uio->uio_offset; 584 idx = OFF_TO_IDX(addr); 585 offset = addr & PAGE_MASK; 586 tlen = MIN(PAGE_SIZE - offset, len); 587 588 if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 589 vpg = NULL; 590 goto nocache; 591 } 592 593 VM_OBJECT_LOCK(vobj); 594 lookupvpg: 595 if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 596 vm_page_is_valid(vpg, offset, tlen)) { 597 if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 598 goto lookupvpg; 599 vm_page_busy(vpg); 600 vm_page_lock_queues(); 601 vm_page_undirty(vpg); 602 vm_page_unlock_queues(); 603 VM_OBJECT_UNLOCK(vobj); 604 sched_pin(); 605 sf = sf_buf_alloc(vpg, SFB_CPUPRIVATE); 606 va = (caddr_t)sf_buf_kva(sf); 607 error = uiomove(va + offset, tlen, uio); 608 sf_buf_free(sf); 609 sched_unpin(); 610 } else { 611 VM_OBJECT_UNLOCK(vobj); 612 vpg = NULL; 613 } 614 nocache: 615 VM_OBJECT_LOCK(tobj); 616 vm_object_pip_add(tobj, 1); 617 tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 618 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 619 if (tpg->valid != VM_PAGE_BITS_ALL) { 620 int behind, ahead; 621 if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 622 error = vm_pager_get_pages(tobj, &tpg, 1, 0); 623 if (error != 0) { 624 printf("tmpfs get pages from pager error [write]\n"); 625 goto out; 626 } 627 } else 628 vm_page_zero_invalid(tpg, TRUE); 629 } 630 VM_OBJECT_UNLOCK(tobj); 631 if (vpg == NULL) { 632 sched_pin(); 633 sf = sf_buf_alloc(tpg, SFB_CPUPRIVATE); 634 va = (caddr_t)sf_buf_kva(sf); 635 error = uiomove(va + offset, tlen, uio); 636 sf_buf_free(sf); 637 sched_unpin(); 638 } else { 639 KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 640 pmap_copy_page(vpg, tpg); 641 } 642 VM_OBJECT_LOCK(tobj); 643 out: 644 if (vobj != NULL) 645 VM_OBJECT_LOCK(vobj); 646 vm_page_lock_queues(); 647 if (error == 0) { 648 vm_page_set_validclean(tpg, offset, tlen); 649 vm_page_zero_invalid(tpg, TRUE); 650 vm_page_dirty(tpg); 651 } 652 vm_page_unwire(tpg, 0); 653 vm_page_activate(tpg); 654 vm_page_unlock_queues(); 655 vm_page_wakeup(tpg); 656 if (vpg != NULL) 657 vm_page_wakeup(vpg); 658 if (vobj != NULL) 659 VM_OBJECT_UNLOCK(vobj); 660 vm_object_pip_subtract(tobj, 1); 661 VM_OBJECT_UNLOCK(tobj); 662 663 return (error); 664 } 665 666 static int 667 tmpfs_write(struct vop_write_args *v) 668 { 669 struct vnode *vp = v->a_vp; 670 struct uio *uio = v->a_uio; 671 int ioflag = v->a_ioflag; 672 struct thread *td = uio->uio_td; 673 674 boolean_t extended; 675 int error = 0; 676 off_t oldsize; 677 struct tmpfs_node *node; 678 vm_object_t uobj; 679 size_t len; 680 int resid; 681 682 node = VP_TO_TMPFS_NODE(vp); 683 oldsize = node->tn_size; 684 685 if (uio->uio_offset < 0 || vp->v_type != VREG) { 686 error = EINVAL; 687 goto out; 688 } 689 690 if (uio->uio_resid == 0) { 691 error = 0; 692 goto out; 693 } 694 695 if (ioflag & IO_APPEND) 696 uio->uio_offset = node->tn_size; 697 698 if (uio->uio_offset + uio->uio_resid > 699 VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 700 return (EFBIG); 701 702 if (vp->v_type == VREG && td != NULL) { 703 PROC_LOCK(td->td_proc); 704 if (uio->uio_offset + uio->uio_resid > 705 lim_cur(td->td_proc, RLIMIT_FSIZE)) { 706 psignal(td->td_proc, SIGXFSZ); 707 PROC_UNLOCK(td->td_proc); 708 return (EFBIG); 709 } 710 PROC_UNLOCK(td->td_proc); 711 } 712 713 extended = uio->uio_offset + uio->uio_resid > node->tn_size; 714 if (extended) { 715 error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 716 if (error != 0) 717 goto out; 718 } 719 720 uobj = node->tn_reg.tn_aobj; 721 while ((resid = uio->uio_resid) > 0) { 722 if (node->tn_size <= uio->uio_offset) 723 break; 724 len = MIN(node->tn_size - uio->uio_offset, resid); 725 if (len == 0) 726 break; 727 error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 728 if ((error != 0) || (resid == uio->uio_resid)) 729 break; 730 } 731 732 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 733 (extended ? TMPFS_NODE_CHANGED : 0); 734 735 if (node->tn_mode & (S_ISUID | S_ISGID)) { 736 if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 737 node->tn_mode &= ~(S_ISUID | S_ISGID); 738 } 739 740 if (error != 0) 741 (void)tmpfs_reg_resize(vp, oldsize); 742 743 out: 744 MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 745 MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 746 747 return error; 748 } 749 750 /* --------------------------------------------------------------------- */ 751 752 static int 753 tmpfs_fsync(struct vop_fsync_args *v) 754 { 755 struct vnode *vp = v->a_vp; 756 757 MPASS(VOP_ISLOCKED(vp, v->a_td)); 758 759 tmpfs_update(vp); 760 761 return 0; 762 } 763 764 /* --------------------------------------------------------------------- */ 765 766 static int 767 tmpfs_remove(struct vop_remove_args *v) 768 { 769 struct vnode *dvp = v->a_dvp; 770 struct vnode *vp = v->a_vp; 771 772 int error; 773 struct tmpfs_dirent *de; 774 struct tmpfs_mount *tmp; 775 struct tmpfs_node *dnode; 776 struct tmpfs_node *node; 777 778 MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 779 MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 780 781 if (vp->v_type == VDIR) { 782 error = EISDIR; 783 goto out; 784 } 785 786 dnode = VP_TO_TMPFS_DIR(dvp); 787 node = VP_TO_TMPFS_NODE(vp); 788 tmp = VFS_TO_TMPFS(vp->v_mount); 789 de = node->tn_lookup_dirent; 790 MPASS(de != NULL); 791 792 /* Files marked as immutable or append-only cannot be deleted. */ 793 if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 794 (dnode->tn_flags & APPEND)) { 795 error = EPERM; 796 goto out; 797 } 798 799 /* Remove the entry from the directory; as it is a file, we do not 800 * have to change the number of hard links of the directory. */ 801 tmpfs_dir_detach(dvp, de); 802 803 /* Free the directory entry we just deleted. Note that the node 804 * referred by it will not be removed until the vnode is really 805 * reclaimed. */ 806 tmpfs_free_dirent(tmp, de, TRUE); 807 808 if (node->tn_links > 0) 809 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 810 TMPFS_NODE_MODIFIED; 811 error = 0; 812 813 out: 814 815 return error; 816 } 817 818 /* --------------------------------------------------------------------- */ 819 820 static int 821 tmpfs_link(struct vop_link_args *v) 822 { 823 struct vnode *dvp = v->a_tdvp; 824 struct vnode *vp = v->a_vp; 825 struct componentname *cnp = v->a_cnp; 826 827 int error; 828 struct tmpfs_dirent *de; 829 struct tmpfs_node *node; 830 831 MPASS(VOP_ISLOCKED(dvp, cnp->cn_thread)); 832 MPASS(cnp->cn_flags & HASBUF); 833 MPASS(dvp != vp); /* XXX When can this be false? */ 834 835 node = VP_TO_TMPFS_NODE(vp); 836 837 /* XXX: Why aren't the following two tests done by the caller? */ 838 839 /* Hard links of directories are forbidden. */ 840 if (vp->v_type == VDIR) { 841 error = EPERM; 842 goto out; 843 } 844 845 /* Cannot create cross-device links. */ 846 if (dvp->v_mount != vp->v_mount) { 847 error = EXDEV; 848 goto out; 849 } 850 851 /* Ensure that we do not overflow the maximum number of links imposed 852 * by the system. */ 853 MPASS(node->tn_links <= LINK_MAX); 854 if (node->tn_links == LINK_MAX) { 855 error = EMLINK; 856 goto out; 857 } 858 859 /* We cannot create links of files marked immutable or append-only. */ 860 if (node->tn_flags & (IMMUTABLE | APPEND)) { 861 error = EPERM; 862 goto out; 863 } 864 865 /* Allocate a new directory entry to represent the node. */ 866 error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 867 cnp->cn_nameptr, cnp->cn_namelen, &de); 868 if (error != 0) 869 goto out; 870 871 /* Insert the new directory entry into the appropriate directory. */ 872 tmpfs_dir_attach(dvp, de); 873 874 /* vp link count has changed, so update node times. */ 875 node->tn_status |= TMPFS_NODE_CHANGED; 876 tmpfs_update(vp); 877 878 error = 0; 879 880 out: 881 return error; 882 } 883 884 /* --------------------------------------------------------------------- */ 885 886 static int 887 tmpfs_rename(struct vop_rename_args *v) 888 { 889 struct vnode *fdvp = v->a_fdvp; 890 struct vnode *fvp = v->a_fvp; 891 struct componentname *fcnp = v->a_fcnp; 892 struct vnode *tdvp = v->a_tdvp; 893 struct vnode *tvp = v->a_tvp; 894 struct componentname *tcnp = v->a_tcnp; 895 896 char *newname; 897 int error; 898 struct tmpfs_dirent *de; 899 struct tmpfs_node *fdnode; 900 struct tmpfs_node *fnode; 901 struct tmpfs_node *tnode; 902 struct tmpfs_node *tdnode; 903 904 MPASS(VOP_ISLOCKED(tdvp, tcnp->cn_thread)); 905 MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp, tcnp->cn_thread))); 906 MPASS(fcnp->cn_flags & HASBUF); 907 MPASS(tcnp->cn_flags & HASBUF); 908 909 fdnode = VP_TO_TMPFS_DIR(fdvp); 910 fnode = VP_TO_TMPFS_NODE(fvp); 911 tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 912 de = fnode->tn_lookup_dirent; 913 914 /* Disallow cross-device renames. 915 * XXX Why isn't this done by the caller? */ 916 if (fvp->v_mount != tdvp->v_mount || 917 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 918 error = EXDEV; 919 goto out; 920 } 921 922 tdnode = VP_TO_TMPFS_DIR(tdvp); 923 924 /* If source and target are the same file, there is nothing to do. */ 925 if (fvp == tvp) { 926 error = 0; 927 goto out; 928 } 929 930 /* Avoid manipulating '.' and '..' entries. */ 931 if (de == NULL) { 932 MPASS(fvp->v_type == VDIR); 933 error = EINVAL; 934 goto out; 935 } 936 MPASS(de->td_node == fnode); 937 938 /* If re-naming a directory to another preexisting directory 939 * ensure that the target directory is empty so that its 940 * removal causes no side effects. 941 * Kern_rename gurantees the destination to be a directory 942 * if the source is one. */ 943 if (tvp != NULL) { 944 MPASS(tnode != NULL); 945 946 if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 947 (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 948 error = EPERM; 949 goto out; 950 } 951 952 if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 953 if (tnode->tn_size > 0) { 954 error = ENOTEMPTY; 955 goto out; 956 } 957 } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 958 error = ENOTDIR; 959 goto out; 960 } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 961 error = EISDIR; 962 goto out; 963 } else { 964 MPASS(fnode->tn_type != VDIR && 965 tnode->tn_type != VDIR); 966 } 967 } 968 969 /* If we need to move the directory between entries, lock the 970 * source so that we can safely operate on it. */ 971 if (fdnode != tdnode) { 972 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY, tcnp->cn_thread); 973 if (error != 0) 974 goto out; 975 } 976 977 if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 978 || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 979 error = EPERM; 980 goto out_locked; 981 } 982 983 /* Ensure that we have enough memory to hold the new name, if it 984 * has to be changed. */ 985 if (fcnp->cn_namelen != tcnp->cn_namelen || 986 memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 987 newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 988 } else 989 newname = NULL; 990 991 /* If the node is being moved to another directory, we have to do 992 * the move. */ 993 if (fdnode != tdnode) { 994 /* In case we are moving a directory, we have to adjust its 995 * parent to point to the new parent. */ 996 if (de->td_node->tn_type == VDIR) { 997 struct tmpfs_node *n; 998 999 /* Ensure the target directory is not a child of the 1000 * directory being moved. Otherwise, we'd end up 1001 * with stale nodes. */ 1002 n = tdnode; 1003 while (n != n->tn_dir.tn_parent) { 1004 if (n == fnode) { 1005 error = EINVAL; 1006 if (newname != NULL) 1007 free(newname, M_TMPFSNAME); 1008 goto out_locked; 1009 } 1010 n = n->tn_dir.tn_parent; 1011 } 1012 1013 /* Adjust the parent pointer. */ 1014 TMPFS_VALIDATE_DIR(fnode); 1015 de->td_node->tn_dir.tn_parent = tdnode; 1016 1017 /* As a result of changing the target of the '..' 1018 * entry, the link count of the source and target 1019 * directories has to be adjusted. */ 1020 fdnode->tn_links--; 1021 tdnode->tn_links++; 1022 } 1023 1024 /* Do the move: just remove the entry from the source directory 1025 * and insert it into the target one. */ 1026 tmpfs_dir_detach(fdvp, de); 1027 tmpfs_dir_attach(tdvp, de); 1028 } 1029 1030 /* If the name has changed, we need to make it effective by changing 1031 * it in the directory entry. */ 1032 if (newname != NULL) { 1033 MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1034 1035 free(de->td_name, M_TMPFSNAME); 1036 de->td_namelen = (uint16_t)tcnp->cn_namelen; 1037 memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1038 de->td_name = newname; 1039 1040 fnode->tn_status |= TMPFS_NODE_CHANGED; 1041 tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1042 } 1043 1044 /* If we are overwriting an entry, we have to remove the old one 1045 * from the target directory. */ 1046 if (tvp != NULL) { 1047 /* Remove the old entry from the target directory. */ 1048 de = tnode->tn_lookup_dirent; 1049 tmpfs_dir_detach(tdvp, de); 1050 1051 /* Free the directory entry we just deleted. Note that the 1052 * node referred by it will not be removed until the vnode is 1053 * really reclaimed. */ 1054 tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1055 } 1056 1057 error = 0; 1058 1059 out_locked: 1060 if (fdnode != tdnode) 1061 VOP_UNLOCK(fdvp, 0, tcnp->cn_thread); 1062 1063 out: 1064 /* Release target nodes. */ 1065 /* XXX: I don't understand when tdvp can be the same as tvp, but 1066 * other code takes care of this... */ 1067 if (tdvp == tvp) 1068 vrele(tdvp); 1069 else 1070 vput(tdvp); 1071 if (tvp != NULL) 1072 vput(tvp); 1073 1074 /* Release source nodes. */ 1075 vrele(fdvp); 1076 vrele(fvp); 1077 1078 return error; 1079 } 1080 1081 /* --------------------------------------------------------------------- */ 1082 1083 static int 1084 tmpfs_mkdir(struct vop_mkdir_args *v) 1085 { 1086 struct vnode *dvp = v->a_dvp; 1087 struct vnode **vpp = v->a_vpp; 1088 struct componentname *cnp = v->a_cnp; 1089 struct vattr *vap = v->a_vap; 1090 1091 MPASS(vap->va_type == VDIR); 1092 1093 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1094 } 1095 1096 /* --------------------------------------------------------------------- */ 1097 1098 static int 1099 tmpfs_rmdir(struct vop_rmdir_args *v) 1100 { 1101 struct vnode *dvp = v->a_dvp; 1102 struct vnode *vp = v->a_vp; 1103 1104 int error; 1105 struct tmpfs_dirent *de; 1106 struct tmpfs_mount *tmp; 1107 struct tmpfs_node *dnode; 1108 struct tmpfs_node *node; 1109 1110 MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 1111 MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 1112 1113 tmp = VFS_TO_TMPFS(dvp->v_mount); 1114 dnode = VP_TO_TMPFS_DIR(dvp); 1115 node = VP_TO_TMPFS_DIR(vp); 1116 1117 /* Directories with more than two entries ('.' and '..') cannot be 1118 * removed. */ 1119 if (node->tn_size > 0) { 1120 error = ENOTEMPTY; 1121 goto out; 1122 } 1123 1124 if ((dnode->tn_flags & APPEND) 1125 || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1126 error = EPERM; 1127 goto out; 1128 } 1129 1130 /* This invariant holds only if we are not trying to remove "..". 1131 * We checked for that above so this is safe now. */ 1132 MPASS(node->tn_dir.tn_parent == dnode); 1133 1134 /* Get the directory entry associated with node (vp). This was 1135 * filled by tmpfs_lookup while looking up the entry. */ 1136 de = node->tn_lookup_dirent; 1137 MPASS(TMPFS_DIRENT_MATCHES(de, 1138 v->a_cnp->cn_nameptr, 1139 v->a_cnp->cn_namelen)); 1140 1141 /* Check flags to see if we are allowed to remove the directory. */ 1142 if (dnode->tn_flags & APPEND 1143 || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1144 error = EPERM; 1145 goto out; 1146 } 1147 1148 /* Detach the directory entry from the directory (dnode). */ 1149 tmpfs_dir_detach(dvp, de); 1150 1151 node->tn_links--; 1152 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1153 TMPFS_NODE_MODIFIED; 1154 node->tn_dir.tn_parent->tn_links--; 1155 node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1156 TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1157 1158 cache_purge(dvp); 1159 cache_purge(vp); 1160 1161 /* Free the directory entry we just deleted. Note that the node 1162 * referred by it will not be removed until the vnode is really 1163 * reclaimed. */ 1164 tmpfs_free_dirent(tmp, de, TRUE); 1165 1166 /* Release the deleted vnode (will destroy the node, notify 1167 * interested parties and clean it from the cache). */ 1168 1169 dnode->tn_status |= TMPFS_NODE_CHANGED; 1170 tmpfs_update(dvp); 1171 1172 error = 0; 1173 1174 out: 1175 return error; 1176 } 1177 1178 /* --------------------------------------------------------------------- */ 1179 1180 static int 1181 tmpfs_symlink(struct vop_symlink_args *v) 1182 { 1183 struct vnode *dvp = v->a_dvp; 1184 struct vnode **vpp = v->a_vpp; 1185 struct componentname *cnp = v->a_cnp; 1186 struct vattr *vap = v->a_vap; 1187 char *target = v->a_target; 1188 1189 #ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1190 MPASS(vap->va_type == VLNK); 1191 #else 1192 vap->va_type = VLNK; 1193 #endif 1194 1195 return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1196 } 1197 1198 /* --------------------------------------------------------------------- */ 1199 1200 static int 1201 tmpfs_readdir(struct vop_readdir_args *v) 1202 { 1203 struct vnode *vp = v->a_vp; 1204 struct uio *uio = v->a_uio; 1205 int *eofflag = v->a_eofflag; 1206 u_long **cookies = v->a_cookies; 1207 int *ncookies = v->a_ncookies; 1208 1209 int error; 1210 off_t startoff; 1211 off_t cnt = 0; 1212 struct tmpfs_node *node; 1213 1214 /* This operation only makes sense on directory nodes. */ 1215 if (vp->v_type != VDIR) 1216 return ENOTDIR; 1217 1218 node = VP_TO_TMPFS_DIR(vp); 1219 1220 startoff = uio->uio_offset; 1221 1222 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1223 error = tmpfs_dir_getdotdent(node, uio); 1224 if (error != 0) 1225 goto outok; 1226 cnt++; 1227 } 1228 1229 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1230 error = tmpfs_dir_getdotdotdent(node, uio); 1231 if (error != 0) 1232 goto outok; 1233 cnt++; 1234 } 1235 1236 error = tmpfs_dir_getdents(node, uio, &cnt); 1237 1238 outok: 1239 MPASS(error >= -1); 1240 1241 if (error == -1) 1242 error = 0; 1243 1244 if (eofflag != NULL) 1245 *eofflag = 1246 (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1247 1248 /* Update NFS-related variables. */ 1249 if (error == 0 && cookies != NULL && ncookies != NULL) { 1250 off_t i; 1251 off_t off = startoff; 1252 struct tmpfs_dirent *de = NULL; 1253 1254 *ncookies = cnt; 1255 *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1256 1257 for (i = 0; i < cnt; i++) { 1258 MPASS(off != TMPFS_DIRCOOKIE_EOF); 1259 if (off == TMPFS_DIRCOOKIE_DOT) { 1260 off = TMPFS_DIRCOOKIE_DOTDOT; 1261 } else { 1262 if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1263 de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1264 } else if (de != NULL) { 1265 de = TAILQ_NEXT(de, td_entries); 1266 } else { 1267 de = tmpfs_dir_lookupbycookie(node, 1268 off); 1269 MPASS(de != NULL); 1270 de = TAILQ_NEXT(de, td_entries); 1271 } 1272 if (de == NULL) 1273 off = TMPFS_DIRCOOKIE_EOF; 1274 else 1275 off = tmpfs_dircookie(de); 1276 } 1277 1278 (*cookies)[i] = off; 1279 } 1280 MPASS(uio->uio_offset == off); 1281 } 1282 1283 return error; 1284 } 1285 1286 /* --------------------------------------------------------------------- */ 1287 1288 static int 1289 tmpfs_readlink(struct vop_readlink_args *v) 1290 { 1291 struct vnode *vp = v->a_vp; 1292 struct uio *uio = v->a_uio; 1293 1294 int error; 1295 struct tmpfs_node *node; 1296 1297 MPASS(uio->uio_offset == 0); 1298 MPASS(vp->v_type == VLNK); 1299 1300 node = VP_TO_TMPFS_NODE(vp); 1301 1302 error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1303 uio); 1304 node->tn_status |= TMPFS_NODE_ACCESSED; 1305 1306 return error; 1307 } 1308 1309 /* --------------------------------------------------------------------- */ 1310 1311 static int 1312 tmpfs_inactive(struct vop_inactive_args *v) 1313 { 1314 struct vnode *vp = v->a_vp; 1315 struct thread *l = v->a_td; 1316 1317 struct tmpfs_node *node; 1318 1319 MPASS(VOP_ISLOCKED(vp, l)); 1320 1321 node = VP_TO_TMPFS_NODE(vp); 1322 1323 if (node->tn_links == 0) 1324 vrecycle(vp, l); 1325 1326 return 0; 1327 } 1328 1329 /* --------------------------------------------------------------------- */ 1330 1331 int 1332 tmpfs_reclaim(struct vop_reclaim_args *v) 1333 { 1334 struct vnode *vp = v->a_vp; 1335 1336 struct tmpfs_mount *tmp; 1337 struct tmpfs_node *node; 1338 1339 node = VP_TO_TMPFS_NODE(vp); 1340 tmp = VFS_TO_TMPFS(vp->v_mount); 1341 1342 vnode_destroy_vobject(vp); 1343 cache_purge(vp); 1344 tmpfs_free_vp(vp); 1345 1346 /* If the node referenced by this vnode was deleted by the user, 1347 * we must free its associated data structures (now that the vnode 1348 * is being reclaimed). */ 1349 if (node->tn_links == 0) 1350 tmpfs_free_node(tmp, node); 1351 1352 MPASS(vp->v_data == NULL); 1353 return 0; 1354 } 1355 1356 /* --------------------------------------------------------------------- */ 1357 1358 static int 1359 tmpfs_print(struct vop_print_args *v) 1360 { 1361 struct vnode *vp = v->a_vp; 1362 1363 struct tmpfs_node *node; 1364 1365 node = VP_TO_TMPFS_NODE(vp); 1366 1367 printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1368 node, node->tn_flags, node->tn_links); 1369 printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1370 ", status 0x%x\n", 1371 node->tn_mode, node->tn_uid, node->tn_gid, 1372 (uintmax_t)node->tn_size, node->tn_status); 1373 1374 if (vp->v_type == VFIFO) 1375 fifo_printinfo(vp); 1376 1377 printf("\n"); 1378 1379 return 0; 1380 } 1381 1382 /* --------------------------------------------------------------------- */ 1383 1384 static int 1385 tmpfs_pathconf(struct vop_pathconf_args *v) 1386 { 1387 int name = v->a_name; 1388 register_t *retval = v->a_retval; 1389 1390 int error; 1391 1392 error = 0; 1393 1394 switch (name) { 1395 case _PC_LINK_MAX: 1396 *retval = LINK_MAX; 1397 break; 1398 1399 case _PC_NAME_MAX: 1400 *retval = NAME_MAX; 1401 break; 1402 1403 case _PC_PATH_MAX: 1404 *retval = PATH_MAX; 1405 break; 1406 1407 case _PC_PIPE_BUF: 1408 *retval = PIPE_BUF; 1409 break; 1410 1411 case _PC_CHOWN_RESTRICTED: 1412 *retval = 1; 1413 break; 1414 1415 case _PC_NO_TRUNC: 1416 *retval = 1; 1417 break; 1418 1419 case _PC_SYNC_IO: 1420 *retval = 1; 1421 break; 1422 1423 case _PC_FILESIZEBITS: 1424 *retval = 0; /* XXX Don't know which value should I return. */ 1425 break; 1426 1427 default: 1428 error = EINVAL; 1429 } 1430 1431 return error; 1432 } 1433 1434 /* --------------------------------------------------------------------- */ 1435 1436 static int 1437 tmpfs_advlock(struct vop_advlock_args *v) 1438 { 1439 struct vnode *vp = v->a_vp; 1440 1441 struct tmpfs_node *node; 1442 1443 node = VP_TO_TMPFS_NODE(vp); 1444 1445 return lf_advlock(v, &node->tn_lockf, node->tn_size); 1446 } 1447 1448 /* --------------------------------------------------------------------- */ 1449 1450 static int 1451 tmpfs_vptofh(struct vop_vptofh_args *ap) 1452 { 1453 struct tmpfs_fid *tfhp; 1454 struct tmpfs_node *node; 1455 1456 tfhp = (struct tmpfs_fid *)ap->a_fhp; 1457 node = VP_TO_TMPFS_NODE(ap->a_vp); 1458 1459 tfhp->tf_len = sizeof(struct tmpfs_fid); 1460 tfhp->tf_id = node->tn_id; 1461 tfhp->tf_gen = node->tn_gen; 1462 1463 return (0); 1464 } 1465 1466 /* --------------------------------------------------------------------- */ 1467 1468 /* 1469 * vnode operations vector used for files stored in a tmpfs file system. 1470 */ 1471 struct vop_vector tmpfs_vnodeop_entries = { 1472 .vop_default = &default_vnodeops, 1473 .vop_lookup = vfs_cache_lookup, 1474 .vop_cachedlookup = tmpfs_lookup, 1475 .vop_create = tmpfs_create, 1476 .vop_mknod = tmpfs_mknod, 1477 .vop_open = tmpfs_open, 1478 .vop_close = tmpfs_close, 1479 .vop_access = tmpfs_access, 1480 .vop_getattr = tmpfs_getattr, 1481 .vop_setattr = tmpfs_setattr, 1482 .vop_read = tmpfs_read, 1483 .vop_write = tmpfs_write, 1484 .vop_fsync = tmpfs_fsync, 1485 .vop_remove = tmpfs_remove, 1486 .vop_link = tmpfs_link, 1487 .vop_rename = tmpfs_rename, 1488 .vop_mkdir = tmpfs_mkdir, 1489 .vop_rmdir = tmpfs_rmdir, 1490 .vop_symlink = tmpfs_symlink, 1491 .vop_readdir = tmpfs_readdir, 1492 .vop_readlink = tmpfs_readlink, 1493 .vop_inactive = tmpfs_inactive, 1494 .vop_reclaim = tmpfs_reclaim, 1495 .vop_print = tmpfs_print, 1496 .vop_pathconf = tmpfs_pathconf, 1497 .vop_advlock = tmpfs_advlock, 1498 .vop_vptofh = tmpfs_vptofh, 1499 .vop_bmap = VOP_EOPNOTSUPP, 1500 }; 1501 1502