1 /* $NetBSD: tmpfs_vnops.c,v 1.143 2020/06/27 17:29:18 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007, 2020 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 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: tmpfs_vnops.c,v 1.143 2020/06/27 17:29:18 christos Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/dirent.h> 42 #include <sys/fcntl.h> 43 #include <sys/event.h> 44 #include <sys/malloc.h> 45 #include <sys/namei.h> 46 #include <sys/stat.h> 47 #include <sys/uio.h> 48 #include <sys/unistd.h> 49 #include <sys/vnode.h> 50 #include <sys/lockf.h> 51 #include <sys/kauth.h> 52 #include <sys/atomic.h> 53 54 #include <uvm/uvm.h> 55 56 #include <miscfs/fifofs/fifo.h> 57 #include <miscfs/genfs/genfs.h> 58 #include <fs/tmpfs/tmpfs_vnops.h> 59 #include <fs/tmpfs/tmpfs.h> 60 61 /* 62 * vnode operations vector used for files stored in a tmpfs file system. 63 */ 64 int (**tmpfs_vnodeop_p)(void *); 65 const struct vnodeopv_entry_desc tmpfs_vnodeop_entries[] = { 66 { &vop_default_desc, vn_default_error }, 67 { &vop_lookup_desc, tmpfs_lookup }, 68 { &vop_create_desc, tmpfs_create }, 69 { &vop_mknod_desc, tmpfs_mknod }, 70 { &vop_open_desc, tmpfs_open }, 71 { &vop_close_desc, tmpfs_close }, 72 { &vop_access_desc, tmpfs_access }, 73 { &vop_accessx_desc, genfs_accessx }, 74 { &vop_getattr_desc, tmpfs_getattr }, 75 { &vop_setattr_desc, tmpfs_setattr }, 76 { &vop_read_desc, tmpfs_read }, 77 { &vop_write_desc, tmpfs_write }, 78 { &vop_fallocate_desc, genfs_eopnotsupp }, 79 { &vop_fdiscard_desc, genfs_eopnotsupp }, 80 { &vop_ioctl_desc, tmpfs_ioctl }, 81 { &vop_fcntl_desc, tmpfs_fcntl }, 82 { &vop_poll_desc, tmpfs_poll }, 83 { &vop_kqfilter_desc, tmpfs_kqfilter }, 84 { &vop_revoke_desc, tmpfs_revoke }, 85 { &vop_mmap_desc, tmpfs_mmap }, 86 { &vop_fsync_desc, tmpfs_fsync }, 87 { &vop_seek_desc, tmpfs_seek }, 88 { &vop_remove_desc, tmpfs_remove }, 89 { &vop_link_desc, tmpfs_link }, 90 { &vop_rename_desc, tmpfs_rename }, 91 { &vop_mkdir_desc, tmpfs_mkdir }, 92 { &vop_rmdir_desc, tmpfs_rmdir }, 93 { &vop_symlink_desc, tmpfs_symlink }, 94 { &vop_readdir_desc, tmpfs_readdir }, 95 { &vop_readlink_desc, tmpfs_readlink }, 96 { &vop_abortop_desc, tmpfs_abortop }, 97 { &vop_inactive_desc, tmpfs_inactive }, 98 { &vop_reclaim_desc, tmpfs_reclaim }, 99 { &vop_lock_desc, tmpfs_lock }, 100 { &vop_unlock_desc, tmpfs_unlock }, 101 { &vop_bmap_desc, tmpfs_bmap }, 102 { &vop_strategy_desc, tmpfs_strategy }, 103 { &vop_print_desc, tmpfs_print }, 104 { &vop_pathconf_desc, tmpfs_pathconf }, 105 { &vop_islocked_desc, tmpfs_islocked }, 106 { &vop_advlock_desc, tmpfs_advlock }, 107 { &vop_bwrite_desc, tmpfs_bwrite }, 108 { &vop_getpages_desc, tmpfs_getpages }, 109 { &vop_putpages_desc, tmpfs_putpages }, 110 { &vop_whiteout_desc, tmpfs_whiteout }, 111 { NULL, NULL } 112 }; 113 114 const struct vnodeopv_desc tmpfs_vnodeop_opv_desc = { 115 &tmpfs_vnodeop_p, tmpfs_vnodeop_entries 116 }; 117 118 /* 119 * tmpfs_lookup: path name traversal routine. 120 * 121 * Arguments: dvp (directory being searched), vpp (result), 122 * cnp (component name - path). 123 * 124 * => Caller holds a reference and lock on dvp. 125 * => We return looked-up vnode (vpp) locked, with a reference held. 126 */ 127 int 128 tmpfs_lookup(void *v) 129 { 130 struct vop_lookup_v2_args /* { 131 struct vnode *a_dvp; 132 struct vnode **a_vpp; 133 struct componentname *a_cnp; 134 } */ *ap = v; 135 vnode_t *dvp = ap->a_dvp, **vpp = ap->a_vpp; 136 struct componentname *cnp = ap->a_cnp; 137 const bool lastcn = (cnp->cn_flags & ISLASTCN) != 0; 138 tmpfs_node_t *dnode, *tnode; 139 tmpfs_dirent_t *de; 140 int cachefound, iswhiteout; 141 int error; 142 143 KASSERT(VOP_ISLOCKED(dvp)); 144 145 dnode = VP_TO_TMPFS_DIR(dvp); 146 *vpp = NULL; 147 148 /* Check accessibility of directory. */ 149 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 150 if (error) { 151 goto out; 152 } 153 154 /* 155 * If requesting the last path component on a read-only file system 156 * with a write operation, deny it. 157 */ 158 if (lastcn && (dvp->v_mount->mnt_flag & MNT_RDONLY) != 0 && 159 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 160 error = EROFS; 161 goto out; 162 } 163 164 /* 165 * Avoid doing a linear scan of the directory if the requested 166 * directory/name couple is already in the cache. 167 */ 168 cachefound = cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 169 cnp->cn_nameiop, cnp->cn_flags, 170 &iswhiteout, vpp); 171 if (iswhiteout) { 172 cnp->cn_flags |= ISWHITEOUT; 173 } 174 if (cachefound && *vpp == NULLVP) { 175 /* Negative cache hit. */ 176 error = ENOENT; 177 goto out; 178 } else if (cachefound) { 179 error = 0; 180 goto out; 181 } 182 183 /* 184 * Treat an unlinked directory as empty (no "." or "..") 185 */ 186 if (dnode->tn_links == 0) { 187 KASSERT(dnode->tn_size == 0); 188 error = ENOENT; 189 goto out; 190 } 191 192 if (cnp->cn_flags & ISDOTDOT) { 193 tmpfs_node_t *pnode; 194 195 /* 196 * Lookup of ".." case. 197 */ 198 if (lastcn && cnp->cn_nameiop == RENAME) { 199 error = EINVAL; 200 goto out; 201 } 202 KASSERT(dnode->tn_type == VDIR); 203 pnode = dnode->tn_spec.tn_dir.tn_parent; 204 if (pnode == NULL) { 205 error = ENOENT; 206 goto done; 207 } 208 209 error = vcache_get(dvp->v_mount, &pnode, sizeof(pnode), vpp); 210 goto done; 211 } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 212 /* 213 * Lookup of "." case. 214 */ 215 if (lastcn && cnp->cn_nameiop == RENAME) { 216 error = EISDIR; 217 goto out; 218 } 219 vref(dvp); 220 *vpp = dvp; 221 error = 0; 222 goto done; 223 } 224 225 /* 226 * Other lookup cases: perform directory scan. 227 */ 228 de = tmpfs_dir_lookup(dnode, cnp); 229 if (de == NULL || de->td_node == TMPFS_NODE_WHITEOUT) { 230 /* 231 * The entry was not found in the directory. This is valid 232 * if we are creating or renaming an entry and are working 233 * on the last component of the path name. 234 */ 235 if (lastcn && (cnp->cn_nameiop == CREATE || 236 cnp->cn_nameiop == RENAME)) { 237 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 238 if (error) { 239 goto out; 240 } 241 error = EJUSTRETURN; 242 } else { 243 error = ENOENT; 244 } 245 if (de) { 246 KASSERT(de->td_node == TMPFS_NODE_WHITEOUT); 247 cnp->cn_flags |= ISWHITEOUT; 248 } 249 goto done; 250 } 251 252 tnode = de->td_node; 253 254 /* 255 * If it is not the last path component and found a non-directory 256 * or non-link entry (which may itself be pointing to a directory), 257 * raise an error. 258 */ 259 if (!lastcn && tnode->tn_type != VDIR && tnode->tn_type != VLNK) { 260 error = ENOTDIR; 261 goto out; 262 } 263 264 /* Check the permissions. */ 265 if (lastcn && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 266 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 267 if (error) 268 goto out; 269 270 if ((dnode->tn_mode & S_ISTXT) != 0) { 271 error = kauth_authorize_vnode(cnp->cn_cred, 272 KAUTH_VNODE_DELETE, tnode->tn_vnode, 273 dnode->tn_vnode, genfs_can_sticky(dvp, cnp->cn_cred, 274 dnode->tn_uid, tnode->tn_uid)); 275 if (error) { 276 error = EPERM; 277 goto out; 278 } 279 } 280 } 281 282 /* Get a vnode for the matching entry. */ 283 error = vcache_get(dvp->v_mount, &tnode, sizeof(tnode), vpp); 284 done: 285 /* 286 * Cache the result, unless request was for creation (as it does 287 * not improve the performance). 288 */ 289 if (cnp->cn_nameiop != CREATE) { 290 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 291 cnp->cn_flags); 292 } 293 out: 294 KASSERT(VOP_ISLOCKED(dvp)); 295 296 return error; 297 } 298 299 int 300 tmpfs_create(void *v) 301 { 302 struct vop_create_v3_args /* { 303 struct vnode *a_dvp; 304 struct vnode **a_vpp; 305 struct componentname *a_cnp; 306 struct vattr *a_vap; 307 } */ *ap = v; 308 vnode_t *dvp = ap->a_dvp, **vpp = ap->a_vpp; 309 struct componentname *cnp = ap->a_cnp; 310 struct vattr *vap = ap->a_vap; 311 312 KASSERT(VOP_ISLOCKED(dvp)); 313 KASSERT(vap->va_type == VREG || vap->va_type == VSOCK); 314 return tmpfs_construct_node(dvp, vpp, vap, cnp, NULL); 315 } 316 317 int 318 tmpfs_mknod(void *v) 319 { 320 struct vop_mknod_v3_args /* { 321 struct vnode *a_dvp; 322 struct vnode **a_vpp; 323 struct componentname *a_cnp; 324 struct vattr *a_vap; 325 } */ *ap = v; 326 vnode_t *dvp = ap->a_dvp, **vpp = ap->a_vpp; 327 struct componentname *cnp = ap->a_cnp; 328 struct vattr *vap = ap->a_vap; 329 enum vtype vt = vap->va_type; 330 331 if (vt != VBLK && vt != VCHR && vt != VFIFO) { 332 *vpp = NULL; 333 return EINVAL; 334 } 335 return tmpfs_construct_node(dvp, vpp, vap, cnp, NULL); 336 } 337 338 int 339 tmpfs_open(void *v) 340 { 341 struct vop_open_args /* { 342 struct vnode *a_vp; 343 int a_mode; 344 kauth_cred_t a_cred; 345 } */ *ap = v; 346 vnode_t *vp = ap->a_vp; 347 mode_t mode = ap->a_mode; 348 tmpfs_node_t *node; 349 350 KASSERT(VOP_ISLOCKED(vp)); 351 352 node = VP_TO_TMPFS_NODE(vp); 353 354 /* If the file is marked append-only, deny write requests. */ 355 if ((node->tn_flags & APPEND) != 0 && 356 (mode & (FWRITE | O_APPEND)) == FWRITE) { 357 return EPERM; 358 } 359 return 0; 360 } 361 362 int 363 tmpfs_close(void *v) 364 { 365 struct vop_close_args /* { 366 struct vnode *a_vp; 367 int a_fflag; 368 kauth_cred_t a_cred; 369 } */ *ap = v; 370 vnode_t *vp __diagused = ap->a_vp; 371 372 KASSERT(VOP_ISLOCKED(vp)); 373 return 0; 374 } 375 376 int 377 tmpfs_access(void *v) 378 { 379 struct vop_access_args /* { 380 struct vnode *a_vp; 381 accmode_t a_accmode; 382 kauth_cred_t a_cred; 383 } */ *ap = v; 384 vnode_t *vp = ap->a_vp; 385 accmode_t accmode = ap->a_accmode; 386 kauth_cred_t cred = ap->a_cred; 387 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 388 const bool writing = (accmode & VWRITE) != 0; 389 390 KASSERT(VOP_ISLOCKED(vp)); 391 392 /* Possible? */ 393 switch (vp->v_type) { 394 case VDIR: 395 case VLNK: 396 case VREG: 397 if (writing && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) { 398 return EROFS; 399 } 400 break; 401 case VBLK: 402 case VCHR: 403 case VSOCK: 404 case VFIFO: 405 break; 406 default: 407 return EINVAL; 408 } 409 if (writing && (node->tn_flags & IMMUTABLE) != 0) { 410 return EPERM; 411 } 412 413 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 414 vp->v_type, node->tn_mode), vp, NULL, genfs_can_access(vp, cred, 415 node->tn_uid, node->tn_gid, node->tn_mode, NULL, accmode)); 416 } 417 418 int 419 tmpfs_getattr(void *v) 420 { 421 struct vop_getattr_args /* { 422 struct vnode *a_vp; 423 struct vattr *a_vap; 424 kauth_cred_t a_cred; 425 } */ *ap = v; 426 vnode_t *vp = ap->a_vp; 427 struct vattr *vap = ap->a_vap; 428 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 429 430 vattr_null(vap); 431 432 vap->va_type = vp->v_type; 433 vap->va_mode = node->tn_mode; 434 vap->va_nlink = node->tn_links; 435 vap->va_uid = node->tn_uid; 436 vap->va_gid = node->tn_gid; 437 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 438 vap->va_fileid = node->tn_id; 439 vap->va_size = node->tn_size; 440 vap->va_blocksize = PAGE_SIZE; 441 vap->va_gen = TMPFS_NODE_GEN(node); 442 vap->va_flags = node->tn_flags; 443 vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 444 node->tn_spec.tn_dev.tn_rdev : VNOVAL; 445 vap->va_bytes = round_page(node->tn_size); 446 vap->va_filerev = VNOVAL; 447 vap->va_vaflags = 0; 448 vap->va_spare = VNOVAL; /* XXX */ 449 450 mutex_enter(&node->tn_timelock); 451 tmpfs_update_locked(vp, 0); 452 vap->va_atime = node->tn_atime; 453 vap->va_mtime = node->tn_mtime; 454 vap->va_ctime = node->tn_ctime; 455 vap->va_birthtime = node->tn_birthtime; 456 mutex_exit(&node->tn_timelock); 457 458 return 0; 459 } 460 461 int 462 tmpfs_setattr(void *v) 463 { 464 struct vop_setattr_args /* { 465 struct vnode *a_vp; 466 struct vattr *a_vap; 467 kauth_cred_t a_cred; 468 } */ *ap = v; 469 vnode_t *vp = ap->a_vp; 470 struct vattr *vap = ap->a_vap; 471 kauth_cred_t cred = ap->a_cred; 472 lwp_t *l = curlwp; 473 int error = 0; 474 475 KASSERT(VOP_ISLOCKED(vp)); 476 477 /* Abort if any unsettable attribute is given. */ 478 if (vap->va_type != VNON || vap->va_nlink != VNOVAL || 479 vap->va_fsid != VNOVAL || vap->va_fileid != VNOVAL || 480 vap->va_blocksize != VNOVAL || vap->va_ctime.tv_sec != VNOVAL || 481 vap->va_gen != VNOVAL || vap->va_rdev != VNOVAL || 482 vap->va_bytes != VNOVAL) { 483 return EINVAL; 484 } 485 486 if (error == 0 && vap->va_flags != VNOVAL) 487 error = tmpfs_chflags(vp, vap->va_flags, cred, l); 488 489 if (error == 0 && vap->va_size != VNOVAL) 490 error = tmpfs_chsize(vp, vap->va_size, cred, l); 491 492 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 493 error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, l); 494 495 if (error == 0 && vap->va_mode != VNOVAL) 496 error = tmpfs_chmod(vp, vap->va_mode, cred, l); 497 498 const bool chsometime = 499 vap->va_atime.tv_sec != VNOVAL || 500 vap->va_mtime.tv_sec != VNOVAL || 501 vap->va_birthtime.tv_sec != VNOVAL; 502 if (error == 0 && chsometime) { 503 error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 504 &vap->va_birthtime, vap->va_vaflags, cred, l); 505 } 506 return error; 507 } 508 509 int 510 tmpfs_read(void *v) 511 { 512 struct vop_read_args /* { 513 struct vnode *a_vp; 514 struct uio *a_uio; 515 int a_ioflag; 516 kauth_cred_t a_cred; 517 } */ *ap = v; 518 vnode_t *vp = ap->a_vp; 519 struct uio *uio = ap->a_uio; 520 const int ioflag = ap->a_ioflag; 521 tmpfs_node_t *node; 522 struct uvm_object *uobj; 523 int error; 524 525 KASSERT(VOP_ISLOCKED(vp)); 526 527 if (vp->v_type == VDIR) { 528 return EISDIR; 529 } 530 if (uio->uio_offset < 0 || vp->v_type != VREG) { 531 return EINVAL; 532 } 533 534 /* Note: reading zero bytes should not update atime. */ 535 if (uio->uio_resid == 0) { 536 return 0; 537 } 538 539 node = VP_TO_TMPFS_NODE(vp); 540 uobj = node->tn_spec.tn_reg.tn_aobj; 541 error = 0; 542 543 while (error == 0 && uio->uio_resid > 0) { 544 vsize_t len; 545 546 if (node->tn_size <= uio->uio_offset) { 547 break; 548 } 549 len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); 550 if (len == 0) { 551 break; 552 } 553 error = ubc_uiomove(uobj, uio, len, IO_ADV_DECODE(ioflag), 554 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 555 } 556 557 tmpfs_update(vp, TMPFS_UPDATE_ATIME); 558 return error; 559 } 560 561 int 562 tmpfs_write(void *v) 563 { 564 struct vop_write_args /* { 565 struct vnode *a_vp; 566 struct uio *a_uio; 567 int a_ioflag; 568 kauth_cred_t a_cred; 569 } */ *ap = v; 570 vnode_t *vp = ap->a_vp; 571 struct uio *uio = ap->a_uio; 572 const int ioflag = ap->a_ioflag; 573 tmpfs_node_t *node; 574 struct uvm_object *uobj; 575 off_t oldsize; 576 int error, ubc_flags; 577 578 KASSERT(VOP_ISLOCKED(vp)); 579 580 node = VP_TO_TMPFS_NODE(vp); 581 oldsize = node->tn_size; 582 583 if ((vp->v_mount->mnt_flag & MNT_RDONLY) != 0) { 584 error = EROFS; 585 goto out; 586 } 587 588 if (uio->uio_offset < 0 || vp->v_type != VREG) { 589 error = EINVAL; 590 goto out; 591 } 592 if (uio->uio_resid == 0) { 593 error = 0; 594 goto out; 595 } 596 if (ioflag & IO_APPEND) { 597 uio->uio_offset = node->tn_size; 598 } 599 600 if (uio->uio_offset + uio->uio_resid > node->tn_size) { 601 error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 602 if (error) 603 goto out; 604 } 605 606 /* 607 * If we're extending the file and have data to write that would 608 * not leave an un-zeroed hole, we can avoid fault processing and 609 * zeroing of pages on allocation. 610 * 611 * Don't do this if the file is mapped and we need to touch an 612 * existing page, because writing a mapping of the file into itself 613 * could cause a deadlock on PG_BUSY. 614 * 615 * New pages will not become visible until finished here (because 616 * of PG_BUSY and the vnode lock). 617 */ 618 ubc_flags = UBC_WRITE | UBC_VNODE_FLAGS(vp); 619 if (uio->uio_offset >= oldsize && 620 ((uio->uio_offset & (PAGE_SIZE - 1)) == 0 || 621 ((vp->v_vflag & VV_MAPPED) == 0 && 622 trunc_page(uio->uio_offset) == trunc_page(oldsize)))) { 623 ubc_flags |= UBC_FAULTBUSY; 624 } 625 626 uobj = node->tn_spec.tn_reg.tn_aobj; 627 error = 0; 628 while (error == 0 && uio->uio_resid > 0) { 629 vsize_t len; 630 631 len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); 632 if (len == 0) { 633 break; 634 } 635 error = ubc_uiomove(uobj, uio, len, IO_ADV_DECODE(ioflag), 636 ubc_flags); 637 } 638 if (error) { 639 (void)tmpfs_reg_resize(vp, oldsize); 640 } 641 642 tmpfs_update(vp, TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME); 643 VN_KNOTE(vp, NOTE_WRITE); 644 out: 645 if (error) { 646 KASSERT(oldsize == node->tn_size); 647 } else { 648 KASSERT(uio->uio_resid == 0); 649 } 650 return error; 651 } 652 653 int 654 tmpfs_fsync(void *v) 655 { 656 struct vop_fsync_args /* { 657 struct vnode *a_vp; 658 kauth_cred_t a_cred; 659 int a_flags; 660 off_t a_offlo; 661 off_t a_offhi; 662 struct lwp *a_l; 663 } */ *ap = v; 664 vnode_t *vp __diagused = ap->a_vp; 665 666 /* Nothing to do. Should be up to date. */ 667 KASSERT(VOP_ISLOCKED(vp)); 668 return 0; 669 } 670 671 /* 672 * tmpfs_remove: unlink a file. 673 * 674 * => Both directory (dvp) and file (vp) are locked. 675 * => We unlock and drop the reference on both. 676 */ 677 int 678 tmpfs_remove(void *v) 679 { 680 struct vop_remove_v2_args /* { 681 struct vnode *a_dvp; 682 struct vnode *a_vp; 683 struct componentname *a_cnp; 684 } */ *ap = v; 685 vnode_t *dvp = ap->a_dvp, *vp = ap->a_vp; 686 tmpfs_node_t *dnode, *node; 687 tmpfs_dirent_t *de; 688 int error, tflags; 689 690 KASSERT(VOP_ISLOCKED(dvp)); 691 KASSERT(VOP_ISLOCKED(vp)); 692 693 if (vp->v_type == VDIR) { 694 error = EPERM; 695 goto out; 696 } 697 dnode = VP_TO_TMPFS_DIR(dvp); 698 node = VP_TO_TMPFS_NODE(vp); 699 700 /* 701 * Files marked as immutable or append-only cannot be deleted. 702 * Likewise, files residing on directories marked as append-only 703 * cannot be deleted. 704 */ 705 if (node->tn_flags & (IMMUTABLE | APPEND)) { 706 error = EPERM; 707 goto out; 708 } 709 if (dnode->tn_flags & APPEND) { 710 error = EPERM; 711 goto out; 712 } 713 714 /* Lookup the directory entry (check the cached hint first). */ 715 de = tmpfs_dir_cached(node); 716 if (de == NULL) { 717 struct componentname *cnp = ap->a_cnp; 718 de = tmpfs_dir_lookup(dnode, cnp); 719 } 720 KASSERT(de && de->td_node == node); 721 722 /* 723 * Remove the entry from the directory (drops the link count) and 724 * destroy it or replace with a whiteout. 725 * 726 * Note: the inode referred by it will not be destroyed until the 727 * vnode is reclaimed/recycled. 728 */ 729 730 tmpfs_dir_detach(dnode, de); 731 732 if (ap->a_cnp->cn_flags & DOWHITEOUT) 733 tmpfs_dir_attach(dnode, de, TMPFS_NODE_WHITEOUT); 734 else 735 tmpfs_free_dirent(VFS_TO_TMPFS(vp->v_mount), de); 736 737 tflags = TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME; 738 if (node->tn_links > 0) { 739 /* We removed a hard link. */ 740 tflags |= TMPFS_UPDATE_CTIME; 741 } 742 tmpfs_update(dvp, tflags); 743 error = 0; 744 out: 745 /* Drop the reference and unlock the node. */ 746 if (dvp == vp) { 747 vrele(vp); 748 } else { 749 vput(vp); 750 } 751 return error; 752 } 753 754 /* 755 * tmpfs_link: create a hard link. 756 */ 757 int 758 tmpfs_link(void *v) 759 { 760 struct vop_link_v2_args /* { 761 struct vnode *a_dvp; 762 struct vnode *a_vp; 763 struct componentname *a_cnp; 764 } */ *ap = v; 765 vnode_t *dvp = ap->a_dvp; 766 vnode_t *vp = ap->a_vp; 767 struct componentname *cnp = ap->a_cnp; 768 tmpfs_node_t *dnode, *node; 769 tmpfs_dirent_t *de; 770 int error; 771 772 KASSERT(dvp != vp); 773 KASSERT(VOP_ISLOCKED(dvp)); 774 KASSERT(vp->v_type != VDIR); 775 KASSERT(dvp->v_mount == vp->v_mount); 776 777 dnode = VP_TO_TMPFS_DIR(dvp); 778 node = VP_TO_TMPFS_NODE(vp); 779 780 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 781 782 /* Check for maximum number of links limit. */ 783 if (node->tn_links == LINK_MAX) { 784 error = EMLINK; 785 goto out; 786 } 787 KASSERT(node->tn_links < LINK_MAX); 788 789 /* We cannot create links of files marked immutable or append-only. */ 790 if (node->tn_flags & (IMMUTABLE | APPEND)) { 791 error = EPERM; 792 goto out; 793 } 794 795 /* Allocate a new directory entry to represent the inode. */ 796 error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), 797 cnp->cn_nameptr, cnp->cn_namelen, &de); 798 if (error) { 799 goto out; 800 } 801 802 /* 803 * Insert the entry into the directory. 804 * It will increase the inode link count. 805 */ 806 tmpfs_dir_attach(dnode, de, node); 807 tmpfs_update(dvp, TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME); 808 809 /* Update the timestamps and trigger the event. */ 810 if (node->tn_vnode) { 811 VN_KNOTE(node->tn_vnode, NOTE_LINK); 812 } 813 tmpfs_update(vp, TMPFS_UPDATE_CTIME); 814 error = 0; 815 out: 816 VOP_UNLOCK(vp); 817 return error; 818 } 819 820 int 821 tmpfs_mkdir(void *v) 822 { 823 struct vop_mkdir_v3_args /* { 824 struct vnode *a_dvp; 825 struct vnode **a_vpp; 826 struct componentname *a_cnp; 827 struct vattr *a_vap; 828 } */ *ap = v; 829 vnode_t *dvp = ap->a_dvp; 830 vnode_t **vpp = ap->a_vpp; 831 struct componentname *cnp = ap->a_cnp; 832 struct vattr *vap = ap->a_vap; 833 834 KASSERT(vap->va_type == VDIR); 835 return tmpfs_construct_node(dvp, vpp, vap, cnp, NULL); 836 } 837 838 int 839 tmpfs_rmdir(void *v) 840 { 841 struct vop_rmdir_v2_args /* { 842 struct vnode *a_dvp; 843 struct vnode *a_vp; 844 struct componentname *a_cnp; 845 } */ *ap = v; 846 vnode_t *dvp = ap->a_dvp; 847 vnode_t *vp = ap->a_vp; 848 tmpfs_mount_t *tmp = VFS_TO_TMPFS(dvp->v_mount); 849 tmpfs_node_t *dnode = VP_TO_TMPFS_DIR(dvp); 850 tmpfs_node_t *node = VP_TO_TMPFS_DIR(vp); 851 tmpfs_dirent_t *de; 852 int error = 0; 853 854 KASSERT(VOP_ISLOCKED(dvp)); 855 KASSERT(VOP_ISLOCKED(vp)); 856 857 /* 858 * Directories with more than two entries ('.' and '..') cannot be 859 * removed. There may be whiteout entries, which we will destroy. 860 */ 861 if (node->tn_size > 0) { 862 /* 863 * If never had whiteout entries, the directory is certainly 864 * not empty. Otherwise, scan for any non-whiteout entry. 865 */ 866 if ((node->tn_gen & TMPFS_WHITEOUT_BIT) == 0) { 867 error = ENOTEMPTY; 868 goto out; 869 } 870 TAILQ_FOREACH(de, &node->tn_spec.tn_dir.tn_dir, td_entries) { 871 if (de->td_node != TMPFS_NODE_WHITEOUT) { 872 error = ENOTEMPTY; 873 goto out; 874 } 875 } 876 KASSERT(error == 0); 877 } 878 879 KASSERT(node->tn_spec.tn_dir.tn_parent == dnode); 880 881 /* Lookup the directory entry (check the cached hint first). */ 882 de = tmpfs_dir_cached(node); 883 if (de == NULL) { 884 struct componentname *cnp = ap->a_cnp; 885 de = tmpfs_dir_lookup(dnode, cnp); 886 } 887 KASSERT(de && de->td_node == node); 888 889 /* Check flags to see if we are allowed to remove the directory. */ 890 if (dnode->tn_flags & APPEND || node->tn_flags & (IMMUTABLE | APPEND)) { 891 error = EPERM; 892 goto out; 893 } 894 895 /* Decrement the link count for the virtual '.' entry. */ 896 node->tn_links--; 897 898 /* Detach the directory entry from the directory. */ 899 tmpfs_dir_detach(dnode, de); 900 901 /* Purge the cache for parent. */ 902 cache_purge(dvp); 903 904 /* 905 * Destroy the directory entry or replace it with a whiteout. 906 * 907 * Note: the inode referred by it will not be destroyed until the 908 * vnode is reclaimed. 909 */ 910 if (ap->a_cnp->cn_flags & DOWHITEOUT) 911 tmpfs_dir_attach(dnode, de, TMPFS_NODE_WHITEOUT); 912 else 913 tmpfs_free_dirent(tmp, de); 914 915 /* Destroy the whiteout entries from the node. */ 916 while ((de = TAILQ_FIRST(&node->tn_spec.tn_dir.tn_dir)) != NULL) { 917 KASSERT(de->td_node == TMPFS_NODE_WHITEOUT); 918 tmpfs_dir_detach(node, de); 919 tmpfs_free_dirent(tmp, de); 920 } 921 tmpfs_update(dvp, TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME); 922 923 KASSERT(node->tn_size == 0); 924 KASSERT(node->tn_links == 0); 925 out: 926 /* Release the node. */ 927 KASSERT(dvp != vp); 928 vput(vp); 929 return error; 930 } 931 932 int 933 tmpfs_symlink(void *v) 934 { 935 struct vop_symlink_v3_args /* { 936 struct vnode *a_dvp; 937 struct vnode **a_vpp; 938 struct componentname *a_cnp; 939 struct vattr *a_vap; 940 char *a_target; 941 } */ *ap = v; 942 vnode_t *dvp = ap->a_dvp; 943 vnode_t **vpp = ap->a_vpp; 944 struct componentname *cnp = ap->a_cnp; 945 struct vattr *vap = ap->a_vap; 946 char *target = ap->a_target; 947 948 KASSERT(vap->va_type == VLNK); 949 return tmpfs_construct_node(dvp, vpp, vap, cnp, target); 950 } 951 952 int 953 tmpfs_readdir(void *v) 954 { 955 struct vop_readdir_args /* { 956 struct vnode *a_vp; 957 struct uio *a_uio; 958 kauth_cred_t a_cred; 959 int *a_eofflag; 960 off_t **a_cookies; 961 int *ncookies; 962 } */ *ap = v; 963 vnode_t *vp = ap->a_vp; 964 struct uio *uio = ap->a_uio; 965 int *eofflag = ap->a_eofflag; 966 off_t **cookies = ap->a_cookies; 967 int *ncookies = ap->a_ncookies; 968 off_t startoff, cnt; 969 tmpfs_node_t *node; 970 int error; 971 972 KASSERT(VOP_ISLOCKED(vp)); 973 974 /* This operation only makes sense on directory nodes. */ 975 if (vp->v_type != VDIR) { 976 return ENOTDIR; 977 } 978 node = VP_TO_TMPFS_DIR(vp); 979 startoff = uio->uio_offset; 980 cnt = 0; 981 982 /* 983 * Retrieve the directory entries, unless it is being destroyed. 984 */ 985 if (node->tn_links) { 986 error = tmpfs_dir_getdents(node, uio, &cnt); 987 } else { 988 error = 0; 989 } 990 991 if (eofflag != NULL) { 992 *eofflag = !error && uio->uio_offset == TMPFS_DIRSEQ_EOF; 993 } 994 if (error || cookies == NULL || ncookies == NULL) { 995 return error; 996 } 997 998 /* Update NFS-related variables, if any. */ 999 tmpfs_dirent_t *de = NULL; 1000 off_t i, off = startoff; 1001 1002 *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1003 *ncookies = cnt; 1004 1005 for (i = 0; i < cnt; i++) { 1006 KASSERT(off != TMPFS_DIRSEQ_EOF); 1007 if (off != TMPFS_DIRSEQ_DOT) { 1008 if (off == TMPFS_DIRSEQ_DOTDOT) { 1009 de = TAILQ_FIRST(&node->tn_spec.tn_dir.tn_dir); 1010 } else if (de != NULL) { 1011 de = TAILQ_NEXT(de, td_entries); 1012 } else { 1013 de = tmpfs_dir_lookupbyseq(node, off); 1014 KASSERT(de != NULL); 1015 de = TAILQ_NEXT(de, td_entries); 1016 } 1017 if (de == NULL) { 1018 off = TMPFS_DIRSEQ_EOF; 1019 } else { 1020 off = tmpfs_dir_getseq(node, de); 1021 } 1022 } else { 1023 off = TMPFS_DIRSEQ_DOTDOT; 1024 } 1025 (*cookies)[i] = off; 1026 } 1027 KASSERT(uio->uio_offset == off); 1028 return error; 1029 } 1030 1031 int 1032 tmpfs_readlink(void *v) 1033 { 1034 struct vop_readlink_args /* { 1035 struct vnode *a_vp; 1036 struct uio *a_uio; 1037 kauth_cred_t a_cred; 1038 } */ *ap = v; 1039 vnode_t *vp = ap->a_vp; 1040 struct uio *uio = ap->a_uio; 1041 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 1042 int error; 1043 1044 KASSERT(VOP_ISLOCKED(vp)); 1045 KASSERT(uio->uio_offset == 0); 1046 KASSERT(vp->v_type == VLNK); 1047 1048 /* Note: readlink(2) returns the path without NUL terminator. */ 1049 if (node->tn_size > 0) { 1050 error = uiomove(node->tn_spec.tn_lnk.tn_link, 1051 MIN(node->tn_size, uio->uio_resid), uio); 1052 } else { 1053 error = 0; 1054 } 1055 tmpfs_update(vp, TMPFS_UPDATE_ATIME); 1056 1057 return error; 1058 } 1059 1060 int 1061 tmpfs_inactive(void *v) 1062 { 1063 struct vop_inactive_v2_args /* { 1064 struct vnode *a_vp; 1065 bool *a_recycle; 1066 } */ *ap = v; 1067 vnode_t *vp = ap->a_vp; 1068 tmpfs_node_t *node; 1069 int error = 0; 1070 1071 KASSERT(VOP_ISLOCKED(vp)); 1072 1073 node = VP_TO_TMPFS_NODE(vp); 1074 if (node->tn_links == 0) { 1075 /* 1076 * Mark node as dead by setting its generation to zero. 1077 */ 1078 atomic_and_32(&node->tn_gen, ~TMPFS_NODE_GEN_MASK); 1079 1080 /* 1081 * If the file has been deleted, truncate it, otherwise VFS 1082 * will quite rightly try to write back dirty data, which in 1083 * the case of tmpfs/UAO means needless page deactivations. 1084 */ 1085 if (vp->v_type == VREG) { 1086 error = tmpfs_reg_resize(vp, 0); 1087 } 1088 *ap->a_recycle = true; 1089 } else { 1090 tmpfs_update(vp, 0); 1091 *ap->a_recycle = false; 1092 } 1093 1094 return error; 1095 } 1096 1097 int 1098 tmpfs_reclaim(void *v) 1099 { 1100 struct vop_reclaim_v2_args /* { 1101 struct vnode *a_vp; 1102 } */ *ap = v; 1103 vnode_t *vp = ap->a_vp; 1104 tmpfs_mount_t *tmp = VFS_TO_TMPFS(vp->v_mount); 1105 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 1106 1107 /* Unlock vnode. We still have exclusive access to it. */ 1108 VOP_UNLOCK(vp); 1109 1110 /* Disassociate inode from vnode. */ 1111 node->tn_vnode = NULL; 1112 vp->v_data = NULL; 1113 1114 /* If inode is not referenced, i.e. no links, then destroy it. */ 1115 if (node->tn_links == 0) 1116 tmpfs_free_node(tmp, node); 1117 return 0; 1118 } 1119 1120 int 1121 tmpfs_pathconf(void *v) 1122 { 1123 struct vop_pathconf_args /* { 1124 struct vnode *a_vp; 1125 int a_name; 1126 register_t *a_retval; 1127 } */ *ap = v; 1128 register_t *retval = ap->a_retval; 1129 1130 switch (ap->a_name) { 1131 case _PC_LINK_MAX: 1132 *retval = LINK_MAX; 1133 return 0; 1134 case _PC_NAME_MAX: 1135 *retval = TMPFS_MAXNAMLEN; 1136 return 0; 1137 case _PC_PATH_MAX: 1138 *retval = PATH_MAX; 1139 return 0; 1140 case _PC_PIPE_BUF: 1141 *retval = PIPE_BUF; 1142 return 0; 1143 case _PC_CHOWN_RESTRICTED: 1144 *retval = 1; 1145 return 0; 1146 case _PC_NO_TRUNC: 1147 *retval = 1; 1148 return 0; 1149 case _PC_SYNC_IO: 1150 *retval = 1; 1151 return 0; 1152 case _PC_FILESIZEBITS: 1153 *retval = sizeof(off_t) * CHAR_BIT; 1154 return 0; 1155 default: 1156 return genfs_pathconf(ap); 1157 } 1158 } 1159 1160 int 1161 tmpfs_advlock(void *v) 1162 { 1163 struct vop_advlock_args /* { 1164 struct vnode *a_vp; 1165 void * a_id; 1166 int a_op; 1167 struct flock *a_fl; 1168 int a_flags; 1169 } */ *ap = v; 1170 vnode_t *vp = ap->a_vp; 1171 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 1172 1173 return lf_advlock(v, &node->tn_lockf, node->tn_size); 1174 } 1175 1176 int 1177 tmpfs_getpages(void *v) 1178 { 1179 struct vop_getpages_args /* { 1180 struct vnode *a_vp; 1181 voff_t a_offset; 1182 struct vm_page **a_m; 1183 int *a_count; 1184 int a_centeridx; 1185 vm_prot_t a_access_type; 1186 int a_advice; 1187 int a_flags; 1188 } */ * const ap = v; 1189 vnode_t *vp = ap->a_vp; 1190 const voff_t offset = ap->a_offset; 1191 struct vm_page **pgs = ap->a_m; 1192 const int centeridx = ap->a_centeridx; 1193 const vm_prot_t access_type = ap->a_access_type; 1194 const int advice = ap->a_advice; 1195 const int flags = ap->a_flags; 1196 int error, iflag, npages = *ap->a_count; 1197 tmpfs_node_t *node; 1198 struct uvm_object *uobj; 1199 1200 KASSERT(vp->v_type == VREG); 1201 KASSERT(rw_lock_held(vp->v_uobj.vmobjlock)); 1202 1203 /* 1204 * Currently, PGO_PASTEOF is not supported. 1205 */ 1206 if (vp->v_size <= offset + (centeridx << PAGE_SHIFT)) { 1207 if ((flags & PGO_LOCKED) == 0) 1208 rw_exit(vp->v_uobj.vmobjlock); 1209 return EINVAL; 1210 } 1211 1212 if (vp->v_size < offset + (npages << PAGE_SHIFT)) { 1213 npages = (round_page(vp->v_size) - offset) >> PAGE_SHIFT; 1214 } 1215 1216 /* 1217 * Check for reclaimed vnode. v_interlock is not held here, but 1218 * VI_DEADCHECK is set with vmobjlock held. 1219 */ 1220 iflag = atomic_load_relaxed(&vp->v_iflag); 1221 if (__predict_false((iflag & VI_DEADCHECK) != 0)) { 1222 mutex_enter(vp->v_interlock); 1223 error = vdead_check(vp, VDEAD_NOWAIT); 1224 mutex_exit(vp->v_interlock); 1225 if (error) { 1226 if ((flags & PGO_LOCKED) == 0) 1227 rw_exit(vp->v_uobj.vmobjlock); 1228 return error; 1229 } 1230 } 1231 1232 node = VP_TO_TMPFS_NODE(vp); 1233 uobj = node->tn_spec.tn_reg.tn_aobj; 1234 1235 /* 1236 * Update timestamp lazily. The update will be made real when 1237 * a synchronous update is next made -- or by tmpfs_getattr, 1238 * tmpfs_putpages, and tmpfs_inactive. 1239 */ 1240 if ((flags & PGO_NOTIMESTAMP) == 0) { 1241 u_int tflags = 0; 1242 1243 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1244 tflags |= TMPFS_UPDATE_ATIME; 1245 1246 if ((access_type & VM_PROT_WRITE) != 0) { 1247 tflags |= TMPFS_UPDATE_MTIME; 1248 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1249 tflags |= TMPFS_UPDATE_ATIME; 1250 } 1251 tmpfs_update_lazily(vp, tflags); 1252 } 1253 1254 /* Invoke the pager. The vnode vmobjlock is shared with the UAO. */ 1255 KASSERT(vp->v_uobj.vmobjlock == uobj->vmobjlock); 1256 error = (*uobj->pgops->pgo_get)(uobj, offset, pgs, &npages, centeridx, 1257 access_type, advice, flags); 1258 #if defined(DEBUG) 1259 if (!error && pgs) { 1260 KASSERT(pgs[centeridx] != NULL); 1261 } 1262 #endif 1263 return error; 1264 } 1265 1266 int 1267 tmpfs_putpages(void *v) 1268 { 1269 struct vop_putpages_args /* { 1270 struct vnode *a_vp; 1271 voff_t a_offlo; 1272 voff_t a_offhi; 1273 int a_flags; 1274 } */ * const ap = v; 1275 vnode_t *vp = ap->a_vp; 1276 const voff_t offlo = ap->a_offlo; 1277 const voff_t offhi = ap->a_offhi; 1278 const int flags = ap->a_flags; 1279 tmpfs_node_t *node; 1280 struct uvm_object *uobj; 1281 int error; 1282 1283 KASSERT(rw_write_held(vp->v_uobj.vmobjlock)); 1284 1285 if (vp->v_type != VREG) { 1286 rw_exit(vp->v_uobj.vmobjlock); 1287 return 0; 1288 } 1289 1290 node = VP_TO_TMPFS_NODE(vp); 1291 uobj = node->tn_spec.tn_reg.tn_aobj; 1292 1293 KASSERT(vp->v_uobj.vmobjlock == uobj->vmobjlock); 1294 error = (*uobj->pgops->pgo_put)(uobj, offlo, offhi, flags); 1295 1296 /* XXX mtime */ 1297 1298 /* Process deferred updates. */ 1299 tmpfs_update(vp, 0); 1300 return error; 1301 } 1302 1303 int 1304 tmpfs_whiteout(void *v) 1305 { 1306 struct vop_whiteout_args /* { 1307 struct vnode *a_dvp; 1308 struct componentname *a_cnp; 1309 int a_flags; 1310 } */ *ap = v; 1311 vnode_t *dvp = ap->a_dvp; 1312 struct componentname *cnp = ap->a_cnp; 1313 const int flags = ap->a_flags; 1314 tmpfs_mount_t *tmp = VFS_TO_TMPFS(dvp->v_mount); 1315 tmpfs_node_t *dnode = VP_TO_TMPFS_DIR(dvp); 1316 tmpfs_dirent_t *de; 1317 int error; 1318 1319 switch (flags) { 1320 case LOOKUP: 1321 break; 1322 case CREATE: 1323 error = tmpfs_alloc_dirent(tmp, cnp->cn_nameptr, 1324 cnp->cn_namelen, &de); 1325 if (error) 1326 return error; 1327 tmpfs_dir_attach(dnode, de, TMPFS_NODE_WHITEOUT); 1328 break; 1329 case DELETE: 1330 cnp->cn_flags &= ~DOWHITEOUT; /* when in doubt, cargo cult */ 1331 de = tmpfs_dir_lookup(dnode, cnp); 1332 if (de == NULL) 1333 return ENOENT; 1334 tmpfs_dir_detach(dnode, de); 1335 tmpfs_free_dirent(tmp, de); 1336 break; 1337 } 1338 tmpfs_update(dvp, TMPFS_UPDATE_MTIME | TMPFS_UPDATE_CTIME); 1339 return 0; 1340 } 1341 1342 int 1343 tmpfs_print(void *v) 1344 { 1345 struct vop_print_args /* { 1346 struct vnode *a_vp; 1347 } */ *ap = v; 1348 vnode_t *vp = ap->a_vp; 1349 tmpfs_node_t *node = VP_TO_TMPFS_NODE(vp); 1350 1351 printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n" 1352 "\tmode 0%o, owner %d, group %d, size %" PRIdMAX, 1353 node, node->tn_flags, node->tn_links, node->tn_mode, node->tn_uid, 1354 node->tn_gid, (uintmax_t)node->tn_size); 1355 if (vp->v_type == VFIFO) { 1356 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 1357 } 1358 printf("\n"); 1359 return 0; 1360 } 1361