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sys/fs/tmpfs/tmpfs_vnops.c
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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: releng/8.0/sys/fs/tmpfs/tmpfs_vnops.c 194124 2009-06-13 20:21:08Z alc $"); 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 if (vm_pager_has_page(tobj, idx, NULL, NULL)) { 472 error = vm_pager_get_pages(tobj, &m, 1, 0); 473 if (error != 0) { 474 printf("tmpfs get pages from pager error [read]\n"); 475 goto out; 476 } 477 } else 478 vm_page_zero_invalid(m, TRUE); 479 } 480 VM_OBJECT_UNLOCK(tobj); 481 error = uiomove_fromphys(&m, offset, tlen, uio); 482 VM_OBJECT_LOCK(tobj); 483 out: 484 vm_page_lock_queues(); 485 vm_page_unwire(m, TRUE); 486 vm_page_unlock_queues(); 487 vm_page_wakeup(m); 488 vm_object_pip_subtract(tobj, 1); 489 VM_OBJECT_UNLOCK(tobj); 490 491 return (error); 492 } 493 494 static int 495 tmpfs_read(struct vop_read_args *v) 496 { 497 struct vnode *vp = v->a_vp; 498 struct uio *uio = v->a_uio; 499 500 struct tmpfs_node *node; 501 vm_object_t uobj; 502 size_t len; 503 int resid; 504 505 int error = 0; 506 507 node = VP_TO_TMPFS_NODE(vp); 508 509 if (vp->v_type != VREG) { 510 error = EISDIR; 511 goto out; 512 } 513 514 if (uio->uio_offset < 0) { 515 error = EINVAL; 516 goto out; 517 } 518 519 node->tn_status |= TMPFS_NODE_ACCESSED; 520 521 uobj = node->tn_reg.tn_aobj; 522 while ((resid = uio->uio_resid) > 0) { 523 error = 0; 524 if (node->tn_size <= uio->uio_offset) 525 break; 526 len = MIN(node->tn_size - uio->uio_offset, resid); 527 if (len == 0) 528 break; 529 error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 530 if ((error != 0) || (resid == uio->uio_resid)) 531 break; 532 } 533 534 out: 535 536 return error; 537 } 538 539 /* --------------------------------------------------------------------- */ 540 541 static int 542 tmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 543 { 544 vm_pindex_t idx; 545 vm_page_t vpg, tpg; 546 vm_offset_t offset; 547 off_t addr; 548 size_t tlen; 549 int error; 550 551 error = 0; 552 553 addr = uio->uio_offset; 554 idx = OFF_TO_IDX(addr); 555 offset = addr & PAGE_MASK; 556 tlen = MIN(PAGE_SIZE - offset, len); 557 558 if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 559 vpg = NULL; 560 goto nocache; 561 } 562 563 VM_OBJECT_LOCK(vobj); 564 lookupvpg: 565 if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 566 vm_page_is_valid(vpg, offset, tlen)) { 567 if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 568 goto lookupvpg; 569 vm_page_busy(vpg); 570 vm_page_lock_queues(); 571 vm_page_undirty(vpg); 572 vm_page_unlock_queues(); 573 VM_OBJECT_UNLOCK(vobj); 574 error = uiomove_fromphys(&vpg, offset, tlen, uio); 575 } else { 576 VM_OBJECT_UNLOCK(vobj); 577 vpg = NULL; 578 } 579 nocache: 580 VM_OBJECT_LOCK(tobj); 581 vm_object_pip_add(tobj, 1); 582 tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 583 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 584 if (tpg->valid != VM_PAGE_BITS_ALL) { 585 if (vm_pager_has_page(tobj, idx, NULL, NULL)) { 586 error = vm_pager_get_pages(tobj, &tpg, 1, 0); 587 if (error != 0) { 588 printf("tmpfs get pages from pager error [write]\n"); 589 goto out; 590 } 591 } else 592 vm_page_zero_invalid(tpg, TRUE); 593 } 594 VM_OBJECT_UNLOCK(tobj); 595 if (vpg == NULL) 596 error = uiomove_fromphys(&tpg, offset, tlen, uio); 597 else { 598 KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 599 pmap_copy_page(vpg, tpg); 600 } 601 VM_OBJECT_LOCK(tobj); 602 out: 603 if (vobj != NULL) 604 VM_OBJECT_LOCK(vobj); 605 vm_page_lock_queues(); 606 if (error == 0) { 607 KASSERT(tpg->valid == VM_PAGE_BITS_ALL, 608 ("parts of tpg invalid")); 609 vm_page_dirty(tpg); 610 } 611 vm_page_unwire(tpg, TRUE); 612 vm_page_unlock_queues(); 613 vm_page_wakeup(tpg); 614 if (vpg != NULL) 615 vm_page_wakeup(vpg); 616 if (vobj != NULL) 617 VM_OBJECT_UNLOCK(vobj); 618 vm_object_pip_subtract(tobj, 1); 619 VM_OBJECT_UNLOCK(tobj); 620 621 return (error); 622 } 623 624 static int 625 tmpfs_write(struct vop_write_args *v) 626 { 627 struct vnode *vp = v->a_vp; 628 struct uio *uio = v->a_uio; 629 int ioflag = v->a_ioflag; 630 struct thread *td = uio->uio_td; 631 632 boolean_t extended; 633 int error = 0; 634 off_t oldsize; 635 struct tmpfs_node *node; 636 vm_object_t uobj; 637 size_t len; 638 int resid; 639 640 node = VP_TO_TMPFS_NODE(vp); 641 oldsize = node->tn_size; 642 643 if (uio->uio_offset < 0 || vp->v_type != VREG) { 644 error = EINVAL; 645 goto out; 646 } 647 648 if (uio->uio_resid == 0) { 649 error = 0; 650 goto out; 651 } 652 653 if (ioflag & IO_APPEND) 654 uio->uio_offset = node->tn_size; 655 656 if (uio->uio_offset + uio->uio_resid > 657 VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 658 return (EFBIG); 659 660 if (vp->v_type == VREG && td != NULL) { 661 PROC_LOCK(td->td_proc); 662 if (uio->uio_offset + uio->uio_resid > 663 lim_cur(td->td_proc, RLIMIT_FSIZE)) { 664 psignal(td->td_proc, SIGXFSZ); 665 PROC_UNLOCK(td->td_proc); 666 return (EFBIG); 667 } 668 PROC_UNLOCK(td->td_proc); 669 } 670 671 extended = uio->uio_offset + uio->uio_resid > node->tn_size; 672 if (extended) { 673 error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 674 if (error != 0) 675 goto out; 676 } 677 678 uobj = node->tn_reg.tn_aobj; 679 while ((resid = uio->uio_resid) > 0) { 680 if (node->tn_size <= uio->uio_offset) 681 break; 682 len = MIN(node->tn_size - uio->uio_offset, resid); 683 if (len == 0) 684 break; 685 error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 686 if ((error != 0) || (resid == uio->uio_resid)) 687 break; 688 } 689 690 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 691 (extended ? TMPFS_NODE_CHANGED : 0); 692 693 if (node->tn_mode & (S_ISUID | S_ISGID)) { 694 if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 695 node->tn_mode &= ~(S_ISUID | S_ISGID); 696 } 697 698 if (error != 0) 699 (void)tmpfs_reg_resize(vp, oldsize); 700 701 out: 702 MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 703 MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 704 705 return error; 706 } 707 708 /* --------------------------------------------------------------------- */ 709 710 static int 711 tmpfs_fsync(struct vop_fsync_args *v) 712 { 713 struct vnode *vp = v->a_vp; 714 715 MPASS(VOP_ISLOCKED(vp)); 716 717 tmpfs_update(vp); 718 719 return 0; 720 } 721 722 /* --------------------------------------------------------------------- */ 723 724 static int 725 tmpfs_remove(struct vop_remove_args *v) 726 { 727 struct vnode *dvp = v->a_dvp; 728 struct vnode *vp = v->a_vp; 729 730 int error; 731 struct tmpfs_dirent *de; 732 struct tmpfs_mount *tmp; 733 struct tmpfs_node *dnode; 734 struct tmpfs_node *node; 735 736 MPASS(VOP_ISLOCKED(dvp)); 737 MPASS(VOP_ISLOCKED(vp)); 738 739 if (vp->v_type == VDIR) { 740 error = EISDIR; 741 goto out; 742 } 743 744 dnode = VP_TO_TMPFS_DIR(dvp); 745 node = VP_TO_TMPFS_NODE(vp); 746 tmp = VFS_TO_TMPFS(vp->v_mount); 747 de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 748 MPASS(de != NULL); 749 750 /* Files marked as immutable or append-only cannot be deleted. */ 751 if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 752 (dnode->tn_flags & APPEND)) { 753 error = EPERM; 754 goto out; 755 } 756 757 /* Remove the entry from the directory; as it is a file, we do not 758 * have to change the number of hard links of the directory. */ 759 tmpfs_dir_detach(dvp, de); 760 761 /* Free the directory entry we just deleted. Note that the node 762 * referred by it will not be removed until the vnode is really 763 * reclaimed. */ 764 tmpfs_free_dirent(tmp, de, TRUE); 765 766 if (node->tn_links > 0) 767 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 768 TMPFS_NODE_MODIFIED; 769 error = 0; 770 771 out: 772 773 return error; 774 } 775 776 /* --------------------------------------------------------------------- */ 777 778 static int 779 tmpfs_link(struct vop_link_args *v) 780 { 781 struct vnode *dvp = v->a_tdvp; 782 struct vnode *vp = v->a_vp; 783 struct componentname *cnp = v->a_cnp; 784 785 int error; 786 struct tmpfs_dirent *de; 787 struct tmpfs_node *node; 788 789 MPASS(VOP_ISLOCKED(dvp)); 790 MPASS(cnp->cn_flags & HASBUF); 791 MPASS(dvp != vp); /* XXX When can this be false? */ 792 793 node = VP_TO_TMPFS_NODE(vp); 794 795 /* XXX: Why aren't the following two tests done by the caller? */ 796 797 /* Hard links of directories are forbidden. */ 798 if (vp->v_type == VDIR) { 799 error = EPERM; 800 goto out; 801 } 802 803 /* Cannot create cross-device links. */ 804 if (dvp->v_mount != vp->v_mount) { 805 error = EXDEV; 806 goto out; 807 } 808 809 /* Ensure that we do not overflow the maximum number of links imposed 810 * by the system. */ 811 MPASS(node->tn_links <= LINK_MAX); 812 if (node->tn_links == LINK_MAX) { 813 error = EMLINK; 814 goto out; 815 } 816 817 /* We cannot create links of files marked immutable or append-only. */ 818 if (node->tn_flags & (IMMUTABLE | APPEND)) { 819 error = EPERM; 820 goto out; 821 } 822 823 /* Allocate a new directory entry to represent the node. */ 824 error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 825 cnp->cn_nameptr, cnp->cn_namelen, &de); 826 if (error != 0) 827 goto out; 828 829 /* Insert the new directory entry into the appropriate directory. */ 830 tmpfs_dir_attach(dvp, de); 831 832 /* vp link count has changed, so update node times. */ 833 node->tn_status |= TMPFS_NODE_CHANGED; 834 tmpfs_update(vp); 835 836 error = 0; 837 838 out: 839 return error; 840 } 841 842 /* --------------------------------------------------------------------- */ 843 844 static int 845 tmpfs_rename(struct vop_rename_args *v) 846 { 847 struct vnode *fdvp = v->a_fdvp; 848 struct vnode *fvp = v->a_fvp; 849 struct componentname *fcnp = v->a_fcnp; 850 struct vnode *tdvp = v->a_tdvp; 851 struct vnode *tvp = v->a_tvp; 852 struct componentname *tcnp = v->a_tcnp; 853 854 char *newname; 855 int error; 856 struct tmpfs_dirent *de; 857 struct tmpfs_node *fdnode; 858 struct tmpfs_node *fnode; 859 struct tmpfs_node *tnode; 860 struct tmpfs_node *tdnode; 861 862 MPASS(VOP_ISLOCKED(tdvp)); 863 MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 864 MPASS(fcnp->cn_flags & HASBUF); 865 MPASS(tcnp->cn_flags & HASBUF); 866 867 tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 868 869 /* Disallow cross-device renames. 870 * XXX Why isn't this done by the caller? */ 871 if (fvp->v_mount != tdvp->v_mount || 872 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 873 error = EXDEV; 874 goto out; 875 } 876 877 tdnode = VP_TO_TMPFS_DIR(tdvp); 878 879 /* If source and target are the same file, there is nothing to do. */ 880 if (fvp == tvp) { 881 error = 0; 882 goto out; 883 } 884 885 /* If we need to move the directory between entries, lock the 886 * source so that we can safely operate on it. */ 887 if (tdvp != fdvp) { 888 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 889 if (error != 0) 890 goto out; 891 } 892 fdnode = VP_TO_TMPFS_DIR(fdvp); 893 fnode = VP_TO_TMPFS_NODE(fvp); 894 de = tmpfs_dir_lookup(fdnode, fnode, fcnp); 895 896 /* Avoid manipulating '.' and '..' entries. */ 897 if (de == NULL) { 898 MPASS(fvp->v_type == VDIR); 899 error = EINVAL; 900 goto out_locked; 901 } 902 MPASS(de->td_node == fnode); 903 904 /* If re-naming a directory to another preexisting directory 905 * ensure that the target directory is empty so that its 906 * removal causes no side effects. 907 * Kern_rename gurantees the destination to be a directory 908 * if the source is one. */ 909 if (tvp != NULL) { 910 MPASS(tnode != NULL); 911 912 if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 913 (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 914 error = EPERM; 915 goto out_locked; 916 } 917 918 if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 919 if (tnode->tn_size > 0) { 920 error = ENOTEMPTY; 921 goto out_locked; 922 } 923 } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 924 error = ENOTDIR; 925 goto out_locked; 926 } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 927 error = EISDIR; 928 goto out_locked; 929 } else { 930 MPASS(fnode->tn_type != VDIR && 931 tnode->tn_type != VDIR); 932 } 933 } 934 935 if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 936 || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 937 error = EPERM; 938 goto out_locked; 939 } 940 941 /* Ensure that we have enough memory to hold the new name, if it 942 * has to be changed. */ 943 if (fcnp->cn_namelen != tcnp->cn_namelen || 944 bcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 945 newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 946 } else 947 newname = NULL; 948 949 /* If the node is being moved to another directory, we have to do 950 * the move. */ 951 if (fdnode != tdnode) { 952 /* In case we are moving a directory, we have to adjust its 953 * parent to point to the new parent. */ 954 if (de->td_node->tn_type == VDIR) { 955 struct tmpfs_node *n; 956 957 /* Ensure the target directory is not a child of the 958 * directory being moved. Otherwise, we'd end up 959 * with stale nodes. */ 960 n = tdnode; 961 while (n != n->tn_dir.tn_parent) { 962 if (n == fnode) { 963 error = EINVAL; 964 if (newname != NULL) 965 free(newname, M_TMPFSNAME); 966 goto out_locked; 967 } 968 n = n->tn_dir.tn_parent; 969 } 970 971 /* Adjust the parent pointer. */ 972 TMPFS_VALIDATE_DIR(fnode); 973 de->td_node->tn_dir.tn_parent = tdnode; 974 975 /* As a result of changing the target of the '..' 976 * entry, the link count of the source and target 977 * directories has to be adjusted. */ 978 fdnode->tn_links--; 979 tdnode->tn_links++; 980 } 981 982 /* Do the move: just remove the entry from the source directory 983 * and insert it into the target one. */ 984 tmpfs_dir_detach(fdvp, de); 985 tmpfs_dir_attach(tdvp, de); 986 } 987 988 /* If the name has changed, we need to make it effective by changing 989 * it in the directory entry. */ 990 if (newname != NULL) { 991 MPASS(tcnp->cn_namelen <= MAXNAMLEN); 992 993 free(de->td_name, M_TMPFSNAME); 994 de->td_namelen = (uint16_t)tcnp->cn_namelen; 995 memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 996 de->td_name = newname; 997 998 fnode->tn_status |= TMPFS_NODE_CHANGED; 999 tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1000 } 1001 1002 /* If we are overwriting an entry, we have to remove the old one 1003 * from the target directory. */ 1004 if (tvp != NULL) { 1005 /* Remove the old entry from the target directory. */ 1006 de = tmpfs_dir_lookup(tdnode, tnode, tcnp); 1007 tmpfs_dir_detach(tdvp, de); 1008 1009 /* Free the directory entry we just deleted. Note that the 1010 * node referred by it will not be removed until the vnode is 1011 * really reclaimed. */ 1012 tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1013 } 1014 1015 error = 0; 1016 1017 out_locked: 1018 if (fdnode != tdnode) 1019 VOP_UNLOCK(fdvp, 0); 1020 1021 out: 1022 /* Release target nodes. */ 1023 /* XXX: I don't understand when tdvp can be the same as tvp, but 1024 * other code takes care of this... */ 1025 if (tdvp == tvp) 1026 vrele(tdvp); 1027 else 1028 vput(tdvp); 1029 if (tvp != NULL) 1030 vput(tvp); 1031 1032 /* Release source nodes. */ 1033 vrele(fdvp); 1034 vrele(fvp); 1035 1036 return error; 1037 } 1038 1039 /* --------------------------------------------------------------------- */ 1040 1041 static int 1042 tmpfs_mkdir(struct vop_mkdir_args *v) 1043 { 1044 struct vnode *dvp = v->a_dvp; 1045 struct vnode **vpp = v->a_vpp; 1046 struct componentname *cnp = v->a_cnp; 1047 struct vattr *vap = v->a_vap; 1048 1049 MPASS(vap->va_type == VDIR); 1050 1051 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1052 } 1053 1054 /* --------------------------------------------------------------------- */ 1055 1056 static int 1057 tmpfs_rmdir(struct vop_rmdir_args *v) 1058 { 1059 struct vnode *dvp = v->a_dvp; 1060 struct vnode *vp = v->a_vp; 1061 1062 int error; 1063 struct tmpfs_dirent *de; 1064 struct tmpfs_mount *tmp; 1065 struct tmpfs_node *dnode; 1066 struct tmpfs_node *node; 1067 1068 MPASS(VOP_ISLOCKED(dvp)); 1069 MPASS(VOP_ISLOCKED(vp)); 1070 1071 tmp = VFS_TO_TMPFS(dvp->v_mount); 1072 dnode = VP_TO_TMPFS_DIR(dvp); 1073 node = VP_TO_TMPFS_DIR(vp); 1074 1075 /* Directories with more than two entries ('.' and '..') cannot be 1076 * removed. */ 1077 if (node->tn_size > 0) { 1078 error = ENOTEMPTY; 1079 goto out; 1080 } 1081 1082 if ((dnode->tn_flags & APPEND) 1083 || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1084 error = EPERM; 1085 goto out; 1086 } 1087 1088 /* This invariant holds only if we are not trying to remove "..". 1089 * We checked for that above so this is safe now. */ 1090 MPASS(node->tn_dir.tn_parent == dnode); 1091 1092 /* Get the directory entry associated with node (vp). This was 1093 * filled by tmpfs_lookup while looking up the entry. */ 1094 de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 1095 MPASS(TMPFS_DIRENT_MATCHES(de, 1096 v->a_cnp->cn_nameptr, 1097 v->a_cnp->cn_namelen)); 1098 1099 /* Check flags to see if we are allowed to remove the directory. */ 1100 if (dnode->tn_flags & APPEND 1101 || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1102 error = EPERM; 1103 goto out; 1104 } 1105 1106 /* Detach the directory entry from the directory (dnode). */ 1107 tmpfs_dir_detach(dvp, de); 1108 1109 node->tn_links--; 1110 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1111 TMPFS_NODE_MODIFIED; 1112 node->tn_dir.tn_parent->tn_links--; 1113 node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1114 TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1115 1116 cache_purge(dvp); 1117 cache_purge(vp); 1118 1119 /* Free the directory entry we just deleted. Note that the node 1120 * referred by it will not be removed until the vnode is really 1121 * reclaimed. */ 1122 tmpfs_free_dirent(tmp, de, TRUE); 1123 1124 /* Release the deleted vnode (will destroy the node, notify 1125 * interested parties and clean it from the cache). */ 1126 1127 dnode->tn_status |= TMPFS_NODE_CHANGED; 1128 tmpfs_update(dvp); 1129 1130 error = 0; 1131 1132 out: 1133 return error; 1134 } 1135 1136 /* --------------------------------------------------------------------- */ 1137 1138 static int 1139 tmpfs_symlink(struct vop_symlink_args *v) 1140 { 1141 struct vnode *dvp = v->a_dvp; 1142 struct vnode **vpp = v->a_vpp; 1143 struct componentname *cnp = v->a_cnp; 1144 struct vattr *vap = v->a_vap; 1145 char *target = v->a_target; 1146 1147 #ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1148 MPASS(vap->va_type == VLNK); 1149 #else 1150 vap->va_type = VLNK; 1151 #endif 1152 1153 return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1154 } 1155 1156 /* --------------------------------------------------------------------- */ 1157 1158 static int 1159 tmpfs_readdir(struct vop_readdir_args *v) 1160 { 1161 struct vnode *vp = v->a_vp; 1162 struct uio *uio = v->a_uio; 1163 int *eofflag = v->a_eofflag; 1164 u_long **cookies = v->a_cookies; 1165 int *ncookies = v->a_ncookies; 1166 1167 int error; 1168 off_t startoff; 1169 off_t cnt = 0; 1170 struct tmpfs_node *node; 1171 1172 /* This operation only makes sense on directory nodes. */ 1173 if (vp->v_type != VDIR) 1174 return ENOTDIR; 1175 1176 node = VP_TO_TMPFS_DIR(vp); 1177 1178 startoff = uio->uio_offset; 1179 1180 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1181 error = tmpfs_dir_getdotdent(node, uio); 1182 if (error != 0) 1183 goto outok; 1184 cnt++; 1185 } 1186 1187 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1188 error = tmpfs_dir_getdotdotdent(node, uio); 1189 if (error != 0) 1190 goto outok; 1191 cnt++; 1192 } 1193 1194 error = tmpfs_dir_getdents(node, uio, &cnt); 1195 1196 outok: 1197 MPASS(error >= -1); 1198 1199 if (error == -1) 1200 error = 0; 1201 1202 if (eofflag != NULL) 1203 *eofflag = 1204 (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1205 1206 /* Update NFS-related variables. */ 1207 if (error == 0 && cookies != NULL && ncookies != NULL) { 1208 off_t i; 1209 off_t off = startoff; 1210 struct tmpfs_dirent *de = NULL; 1211 1212 *ncookies = cnt; 1213 *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1214 1215 for (i = 0; i < cnt; i++) { 1216 MPASS(off != TMPFS_DIRCOOKIE_EOF); 1217 if (off == TMPFS_DIRCOOKIE_DOT) { 1218 off = TMPFS_DIRCOOKIE_DOTDOT; 1219 } else { 1220 if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1221 de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1222 } else if (de != NULL) { 1223 de = TAILQ_NEXT(de, td_entries); 1224 } else { 1225 de = tmpfs_dir_lookupbycookie(node, 1226 off); 1227 MPASS(de != NULL); 1228 de = TAILQ_NEXT(de, td_entries); 1229 } 1230 if (de == NULL) 1231 off = TMPFS_DIRCOOKIE_EOF; 1232 else 1233 off = tmpfs_dircookie(de); 1234 } 1235 1236 (*cookies)[i] = off; 1237 } 1238 MPASS(uio->uio_offset == off); 1239 } 1240 1241 return error; 1242 } 1243 1244 /* --------------------------------------------------------------------- */ 1245 1246 static int 1247 tmpfs_readlink(struct vop_readlink_args *v) 1248 { 1249 struct vnode *vp = v->a_vp; 1250 struct uio *uio = v->a_uio; 1251 1252 int error; 1253 struct tmpfs_node *node; 1254 1255 MPASS(uio->uio_offset == 0); 1256 MPASS(vp->v_type == VLNK); 1257 1258 node = VP_TO_TMPFS_NODE(vp); 1259 1260 error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1261 uio); 1262 node->tn_status |= TMPFS_NODE_ACCESSED; 1263 1264 return error; 1265 } 1266 1267 /* --------------------------------------------------------------------- */ 1268 1269 static int 1270 tmpfs_inactive(struct vop_inactive_args *v) 1271 { 1272 struct vnode *vp = v->a_vp; 1273 struct thread *l = v->a_td; 1274 1275 struct tmpfs_node *node; 1276 1277 MPASS(VOP_ISLOCKED(vp)); 1278 1279 node = VP_TO_TMPFS_NODE(vp); 1280 1281 if (node->tn_links == 0) 1282 vrecycle(vp, l); 1283 1284 return 0; 1285 } 1286 1287 /* --------------------------------------------------------------------- */ 1288 1289 int 1290 tmpfs_reclaim(struct vop_reclaim_args *v) 1291 { 1292 struct vnode *vp = v->a_vp; 1293 1294 struct tmpfs_mount *tmp; 1295 struct tmpfs_node *node; 1296 1297 node = VP_TO_TMPFS_NODE(vp); 1298 tmp = VFS_TO_TMPFS(vp->v_mount); 1299 1300 vnode_destroy_vobject(vp); 1301 cache_purge(vp); 1302 tmpfs_free_vp(vp); 1303 1304 /* If the node referenced by this vnode was deleted by the user, 1305 * we must free its associated data structures (now that the vnode 1306 * is being reclaimed). */ 1307 if (node->tn_links == 0) 1308 tmpfs_free_node(tmp, node); 1309 1310 MPASS(vp->v_data == NULL); 1311 return 0; 1312 } 1313 1314 /* --------------------------------------------------------------------- */ 1315 1316 static int 1317 tmpfs_print(struct vop_print_args *v) 1318 { 1319 struct vnode *vp = v->a_vp; 1320 1321 struct tmpfs_node *node; 1322 1323 node = VP_TO_TMPFS_NODE(vp); 1324 1325 printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1326 node, node->tn_flags, node->tn_links); 1327 printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1328 ", status 0x%x\n", 1329 node->tn_mode, node->tn_uid, node->tn_gid, 1330 (uintmax_t)node->tn_size, node->tn_status); 1331 1332 if (vp->v_type == VFIFO) 1333 fifo_printinfo(vp); 1334 1335 printf("\n"); 1336 1337 return 0; 1338 } 1339 1340 /* --------------------------------------------------------------------- */ 1341 1342 static int 1343 tmpfs_pathconf(struct vop_pathconf_args *v) 1344 { 1345 int name = v->a_name; 1346 register_t *retval = v->a_retval; 1347 1348 int error; 1349 1350 error = 0; 1351 1352 switch (name) { 1353 case _PC_LINK_MAX: 1354 *retval = LINK_MAX; 1355 break; 1356 1357 case _PC_NAME_MAX: 1358 *retval = NAME_MAX; 1359 break; 1360 1361 case _PC_PATH_MAX: 1362 *retval = PATH_MAX; 1363 break; 1364 1365 case _PC_PIPE_BUF: 1366 *retval = PIPE_BUF; 1367 break; 1368 1369 case _PC_CHOWN_RESTRICTED: 1370 *retval = 1; 1371 break; 1372 1373 case _PC_NO_TRUNC: 1374 *retval = 1; 1375 break; 1376 1377 case _PC_SYNC_IO: 1378 *retval = 1; 1379 break; 1380 1381 case _PC_FILESIZEBITS: 1382 *retval = 0; /* XXX Don't know which value should I return. */ 1383 break; 1384 1385 default: 1386 error = EINVAL; 1387 } 1388 1389 return error; 1390 } 1391 1392 static int 1393 tmpfs_vptofh(struct vop_vptofh_args *ap) 1394 { 1395 struct tmpfs_fid *tfhp; 1396 struct tmpfs_node *node; 1397 1398 tfhp = (struct tmpfs_fid *)ap->a_fhp; 1399 node = VP_TO_TMPFS_NODE(ap->a_vp); 1400 1401 tfhp->tf_len = sizeof(struct tmpfs_fid); 1402 tfhp->tf_id = node->tn_id; 1403 tfhp->tf_gen = node->tn_gen; 1404 1405 return (0); 1406 } 1407 1408 /* --------------------------------------------------------------------- */ 1409 1410 /* 1411 * vnode operations vector used for files stored in a tmpfs file system. 1412 */ 1413 struct vop_vector tmpfs_vnodeop_entries = { 1414 .vop_default = &default_vnodeops, 1415 .vop_lookup = vfs_cache_lookup, 1416 .vop_cachedlookup = tmpfs_lookup, 1417 .vop_create = tmpfs_create, 1418 .vop_mknod = tmpfs_mknod, 1419 .vop_open = tmpfs_open, 1420 .vop_close = tmpfs_close, 1421 .vop_access = tmpfs_access, 1422 .vop_getattr = tmpfs_getattr, 1423 .vop_setattr = tmpfs_setattr, 1424 .vop_read = tmpfs_read, 1425 .vop_write = tmpfs_write, 1426 .vop_fsync = tmpfs_fsync, 1427 .vop_remove = tmpfs_remove, 1428 .vop_link = tmpfs_link, 1429 .vop_rename = tmpfs_rename, 1430 .vop_mkdir = tmpfs_mkdir, 1431 .vop_rmdir = tmpfs_rmdir, 1432 .vop_symlink = tmpfs_symlink, 1433 .vop_readdir = tmpfs_readdir, 1434 .vop_readlink = tmpfs_readlink, 1435 .vop_inactive = tmpfs_inactive, 1436 .vop_reclaim = tmpfs_reclaim, 1437 .vop_print = tmpfs_print, 1438 .vop_pathconf = tmpfs_pathconf, 1439 .vop_vptofh = tmpfs_vptofh, 1440 .vop_bmap = VOP_EOPNOTSUPP, 1441 }; 1442
Cache object: 8a09ba16457f08d0cdb8d4c8f32d9ad2
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