1 /* $NetBSD: tmpfs_vnops.c,v 1.24 2006/05/15 00:05:16 christos 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 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: tmpfs_vnops.c,v 1.24 2006/05/15 00:05:16 christos Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/dirent.h> 49 #include <sys/fcntl.h> 50 #include <sys/event.h> 51 #include <sys/malloc.h> 52 #include <sys/namei.h> 53 #include <sys/proc.h> 54 #include <sys/stat.h> 55 #include <sys/uio.h> 56 #include <sys/unistd.h> 57 #include <sys/vnode.h> 58 #include <sys/lockf.h> 59 #include <sys/kauth.h> 60 61 #include <uvm/uvm.h> 62 63 #include <miscfs/fifofs/fifo.h> 64 #include <fs/tmpfs/tmpfs_vnops.h> 65 #include <fs/tmpfs/tmpfs.h> 66 67 /* --------------------------------------------------------------------- */ 68 69 /* 70 * vnode operations vector used for files stored in a tmpfs file system. 71 */ 72 int (**tmpfs_vnodeop_p)(void *); 73 const struct vnodeopv_entry_desc tmpfs_vnodeop_entries[] = { 74 { &vop_default_desc, vn_default_error }, 75 { &vop_lookup_desc, tmpfs_lookup }, 76 { &vop_create_desc, tmpfs_create }, 77 { &vop_mknod_desc, tmpfs_mknod }, 78 { &vop_open_desc, tmpfs_open }, 79 { &vop_close_desc, tmpfs_close }, 80 { &vop_access_desc, tmpfs_access }, 81 { &vop_getattr_desc, tmpfs_getattr }, 82 { &vop_setattr_desc, tmpfs_setattr }, 83 { &vop_read_desc, tmpfs_read }, 84 { &vop_write_desc, tmpfs_write }, 85 { &vop_ioctl_desc, tmpfs_ioctl }, 86 { &vop_fcntl_desc, tmpfs_fcntl }, 87 { &vop_poll_desc, tmpfs_poll }, 88 { &vop_kqfilter_desc, tmpfs_kqfilter }, 89 { &vop_revoke_desc, tmpfs_revoke }, 90 { &vop_mmap_desc, tmpfs_mmap }, 91 { &vop_fsync_desc, tmpfs_fsync }, 92 { &vop_seek_desc, tmpfs_seek }, 93 { &vop_remove_desc, tmpfs_remove }, 94 { &vop_link_desc, tmpfs_link }, 95 { &vop_rename_desc, tmpfs_rename }, 96 { &vop_mkdir_desc, tmpfs_mkdir }, 97 { &vop_rmdir_desc, tmpfs_rmdir }, 98 { &vop_symlink_desc, tmpfs_symlink }, 99 { &vop_readdir_desc, tmpfs_readdir }, 100 { &vop_readlink_desc, tmpfs_readlink }, 101 { &vop_abortop_desc, tmpfs_abortop }, 102 { &vop_inactive_desc, tmpfs_inactive }, 103 { &vop_reclaim_desc, tmpfs_reclaim }, 104 { &vop_lock_desc, tmpfs_lock }, 105 { &vop_unlock_desc, tmpfs_unlock }, 106 { &vop_bmap_desc, tmpfs_bmap }, 107 { &vop_strategy_desc, tmpfs_strategy }, 108 { &vop_print_desc, tmpfs_print }, 109 { &vop_pathconf_desc, tmpfs_pathconf }, 110 { &vop_islocked_desc, tmpfs_islocked }, 111 { &vop_advlock_desc, tmpfs_advlock }, 112 { &vop_lease_desc, tmpfs_lease }, 113 { &vop_bwrite_desc, tmpfs_bwrite }, 114 { &vop_getpages_desc, tmpfs_getpages }, 115 { &vop_putpages_desc, tmpfs_putpages }, 116 { NULL, NULL } 117 }; 118 const struct vnodeopv_desc tmpfs_vnodeop_opv_desc = 119 { &tmpfs_vnodeop_p, tmpfs_vnodeop_entries }; 120 121 /* --------------------------------------------------------------------- */ 122 123 int 124 tmpfs_lookup(void *v) 125 { 126 struct vnode *dvp = ((struct vop_lookup_args *)v)->a_dvp; 127 struct vnode **vpp = ((struct vop_lookup_args *)v)->a_vpp; 128 struct componentname *cnp = ((struct vop_lookup_args *)v)->a_cnp; 129 130 int error; 131 struct tmpfs_dirent *de; 132 struct tmpfs_node *dnode; 133 134 KASSERT(VOP_ISLOCKED(dvp)); 135 136 dnode = VP_TO_TMPFS_DIR(dvp); 137 *vpp = NULL; 138 139 /* Check accessibility of requested node as a first step. */ 140 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 141 if (error != 0) 142 goto out; 143 144 /* If requesting the last path component on a read-only file system 145 * with a write operation, deny it. */ 146 if ((cnp->cn_flags & ISLASTCN) && 147 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 148 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 149 error = EROFS; 150 goto out; 151 } 152 153 /* Avoid doing a linear scan of the directory if the requested 154 * directory/name couple is already in the cache. */ 155 error = cache_lookup(dvp, vpp, cnp); 156 if (error >= 0) 157 goto out; 158 159 /* We cannot be requesting the parent directory of the root node. */ 160 KASSERT(IMPLIES(dnode->tn_type == VDIR && 161 dnode->tn_spec.tn_dir.tn_parent == dnode, 162 !(cnp->cn_flags & ISDOTDOT))); 163 164 if (cnp->cn_flags & ISDOTDOT) { 165 VOP_UNLOCK(dvp, 0); 166 167 /* Allocate a new vnode on the matching entry. */ 168 error = tmpfs_alloc_vp(dvp->v_mount, 169 dnode->tn_spec.tn_dir.tn_parent, vpp); 170 171 if (cnp->cn_flags & LOCKPARENT && 172 cnp->cn_flags & ISLASTCN) { 173 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) 174 cnp->cn_flags |= PDIRUNLOCK; 175 } 176 dnode->tn_spec.tn_dir.tn_parent->tn_lookup_dirent = NULL; 177 } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 178 VREF(dvp); 179 *vpp = dvp; 180 dnode->tn_lookup_dirent = NULL; 181 error = 0; 182 } else { 183 de = tmpfs_dir_lookup(dnode, cnp); 184 if (de == NULL) { 185 /* The entry was not found in the directory. 186 * This is OK iff we are creating or renaming an 187 * entry and are working on the last component of 188 * the path name. */ 189 if ((cnp->cn_flags & ISLASTCN) && 190 (cnp->cn_nameiop == CREATE || \ 191 cnp->cn_nameiop == RENAME)) { 192 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 193 cnp->cn_lwp); 194 if (error != 0) 195 goto out; 196 197 /* Keep the component name in the buffer for 198 * future uses. */ 199 cnp->cn_flags |= SAVENAME; 200 201 error = EJUSTRETURN; 202 } else 203 error = ENOENT; 204 } else { 205 struct tmpfs_node *tnode; 206 207 /* The entry was found, so get its associated 208 * tmpfs_node. */ 209 tnode = de->td_node; 210 211 /* If we are not at the last path component and 212 * found a non-directory or non-link entry (which 213 * may itself be pointing to a directory), raise 214 * an error. */ 215 if ((tnode->tn_type != VDIR && 216 tnode->tn_type != VLNK) && 217 !(cnp->cn_flags & ISLASTCN)) { 218 error = ENOTDIR; 219 goto out; 220 } 221 222 /* If we are deleting or renaming the entry, keep 223 * track of its tmpfs_dirent so that it can be 224 * easily deleted later. */ 225 if ((cnp->cn_flags & ISLASTCN) && 226 (cnp->cn_nameiop == DELETE || 227 cnp->cn_nameiop == RENAME)) { 228 if ((dnode->tn_mode & S_ISTXT) != 0 && 229 kauth_cred_geteuid(cnp->cn_cred) != 0 && 230 kauth_cred_geteuid(cnp->cn_cred) != dnode->tn_uid && 231 kauth_cred_geteuid(cnp->cn_cred) != tnode->tn_uid) 232 return EPERM; 233 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 234 cnp->cn_lwp); 235 if (error != 0) 236 goto out; 237 tnode->tn_lookup_dirent = de; 238 } 239 240 /* Allocate a new vnode on the matching entry. */ 241 error = tmpfs_alloc_vp(dvp->v_mount, tnode, vpp); 242 243 if (error == 0 && (!(cnp->cn_flags & LOCKPARENT) || 244 !(cnp->cn_flags & ISLASTCN))) 245 VOP_UNLOCK(dvp, 0); 246 } 247 } 248 249 /* Store the result of this lookup in the cache. Avoid this if the 250 * request was for creation, as it does not improve timings on 251 * emprical tests. */ 252 if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 253 cache_enter(dvp, *vpp, cnp); 254 255 out: 256 /* If there were no errors, *vpp cannot be null and it must be 257 * locked. */ 258 KASSERT(IFF(error == 0, *vpp != NULL && VOP_ISLOCKED(*vpp))); 259 260 /* dvp has to be locked if: 261 * - There were errors and relocking of dvp did not fail. 262 * - We are doing a '..' lookup, relocking of dvp did not fail 263 * (PDIRUNLOCK is unset) and LOCKPARENT or ISLASTCN are not set. 264 * - LOCKPARENT and ISLASTCN are set. */ 265 KASSERT(IMPLIES( 266 (error != 0 && !(cnp->cn_flags & PDIRUNLOCK)) || 267 (cnp->cn_flags & ISDOTDOT && !(cnp->cn_flags & PDIRUNLOCK) && 268 ((cnp->cn_flags & LOCKPARENT) && (cnp->cn_flags & ISLASTCN))) || 269 (cnp->cn_flags & LOCKPARENT && cnp->cn_flags & ISLASTCN) 270 , 271 VOP_ISLOCKED(dvp))); 272 273 return error; 274 } 275 276 /* --------------------------------------------------------------------- */ 277 278 int 279 tmpfs_create(void *v) 280 { 281 struct vnode *dvp = ((struct vop_create_args *)v)->a_dvp; 282 struct vnode **vpp = ((struct vop_create_args *)v)->a_vpp; 283 struct componentname *cnp = ((struct vop_create_args *)v)->a_cnp; 284 struct vattr *vap = ((struct vop_create_args *)v)->a_vap; 285 286 KASSERT(vap->va_type == VREG || vap->va_type == VSOCK); 287 288 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 289 } 290 /* --------------------------------------------------------------------- */ 291 292 int 293 tmpfs_mknod(void *v) 294 { 295 struct vnode *dvp = ((struct vop_mknod_args *)v)->a_dvp; 296 struct vnode **vpp = ((struct vop_mknod_args *)v)->a_vpp; 297 struct componentname *cnp = ((struct vop_mknod_args *)v)->a_cnp; 298 struct vattr *vap = ((struct vop_mknod_args *)v)->a_vap; 299 300 if (vap->va_type != VBLK && vap->va_type != VCHR && 301 vap->va_type != VFIFO) 302 return EINVAL; 303 304 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 305 } 306 307 /* --------------------------------------------------------------------- */ 308 309 int 310 tmpfs_open(void *v) 311 { 312 struct vnode *vp = ((struct vop_open_args *)v)->a_vp; 313 int mode = ((struct vop_open_args *)v)->a_mode; 314 315 int error; 316 struct tmpfs_node *node; 317 318 KASSERT(VOP_ISLOCKED(vp)); 319 320 node = VP_TO_TMPFS_NODE(vp); 321 KASSERT(node->tn_links > 0); 322 323 /* If the file is marked append-only, deny write requests. */ 324 if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 325 error = EPERM; 326 else 327 error = 0; 328 329 KASSERT(VOP_ISLOCKED(vp)); 330 331 return error; 332 } 333 334 /* --------------------------------------------------------------------- */ 335 336 int 337 tmpfs_close(void *v) 338 { 339 struct vnode *vp = ((struct vop_close_args *)v)->a_vp; 340 341 struct tmpfs_node *node; 342 343 KASSERT(VOP_ISLOCKED(vp)); 344 345 node = VP_TO_TMPFS_NODE(vp); 346 347 if (node->tn_links > 0) { 348 /* Update node times. No need to do it if the node has 349 * been deleted, because it will vanish after we return. */ 350 tmpfs_update(vp, NULL, NULL, UPDATE_CLOSE); 351 } 352 353 return 0; 354 } 355 356 /* --------------------------------------------------------------------- */ 357 358 int 359 tmpfs_access(void *v) 360 { 361 struct vnode *vp = ((struct vop_access_args *)v)->a_vp; 362 int mode = ((struct vop_access_args *)v)->a_mode; 363 kauth_cred_t cred = ((struct vop_access_args *)v)->a_cred; 364 365 int error; 366 struct tmpfs_node *node; 367 368 KASSERT(VOP_ISLOCKED(vp)); 369 370 node = VP_TO_TMPFS_NODE(vp); 371 372 switch (vp->v_type) { 373 case VDIR: 374 /* FALLTHROUGH */ 375 case VLNK: 376 /* FALLTHROUGH */ 377 case VREG: 378 if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 379 error = EROFS; 380 goto out; 381 } 382 break; 383 384 case VBLK: 385 /* FALLTHROUGH */ 386 case VCHR: 387 /* FALLTHROUGH */ 388 case VSOCK: 389 /* FALLTHROUGH */ 390 case VFIFO: 391 break; 392 393 default: 394 error = EINVAL; 395 goto out; 396 } 397 398 if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 399 error = EPERM; 400 goto out; 401 } 402 403 error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 404 node->tn_gid, mode, cred); 405 406 out: 407 KASSERT(VOP_ISLOCKED(vp)); 408 409 return error; 410 } 411 412 /* --------------------------------------------------------------------- */ 413 414 int 415 tmpfs_getattr(void *v) 416 { 417 struct vnode *vp = ((struct vop_getattr_args *)v)->a_vp; 418 struct vattr *vap = ((struct vop_getattr_args *)v)->a_vap; 419 420 struct tmpfs_node *node; 421 422 node = VP_TO_TMPFS_NODE(vp); 423 424 VATTR_NULL(vap); 425 426 tmpfs_itimes(vp, NULL, NULL); 427 428 vap->va_type = vp->v_type; 429 vap->va_mode = node->tn_mode; 430 vap->va_nlink = node->tn_links; 431 vap->va_uid = node->tn_uid; 432 vap->va_gid = node->tn_gid; 433 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 434 vap->va_fileid = node->tn_id; 435 vap->va_size = node->tn_size; 436 vap->va_blocksize = PAGE_SIZE; 437 vap->va_atime = node->tn_atime; 438 vap->va_mtime = node->tn_mtime; 439 vap->va_ctime = node->tn_ctime; 440 vap->va_birthtime = node->tn_birthtime; 441 vap->va_gen = node->tn_gen; 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 return 0; 451 } 452 453 /* --------------------------------------------------------------------- */ 454 455 /* XXX Should this operation be atomic? I think it should, but code in 456 * XXX other places (e.g., ufs) doesn't seem to be... */ 457 int 458 tmpfs_setattr(void *v) 459 { 460 struct vnode *vp = ((struct vop_setattr_args *)v)->a_vp; 461 struct vattr *vap = ((struct vop_setattr_args *)v)->a_vap; 462 kauth_cred_t cred = ((struct vop_setattr_args *)v)->a_cred; 463 struct lwp *l = ((struct vop_setattr_args *)v)->a_l; 464 465 int error; 466 467 KASSERT(VOP_ISLOCKED(vp)); 468 469 error = 0; 470 471 /* Abort if any unsettable attribute is given. */ 472 if (vap->va_type != VNON || 473 vap->va_nlink != VNOVAL || 474 vap->va_fsid != VNOVAL || 475 vap->va_fileid != VNOVAL || 476 vap->va_blocksize != VNOVAL || 477 vap->va_ctime.tv_sec != VNOVAL || 478 vap->va_ctime.tv_nsec != VNOVAL || 479 vap->va_birthtime.tv_sec != VNOVAL || 480 vap->va_birthtime.tv_nsec != VNOVAL || 481 vap->va_gen != VNOVAL || 482 vap->va_rdev != VNOVAL || 483 vap->va_bytes != VNOVAL) 484 error = EINVAL; 485 486 if (error == 0 && (vap->va_flags != VNOVAL)) 487 error = tmpfs_chflags(vp, vap->va_flags, cred, l->l_proc); 488 489 if (error == 0 && (vap->va_size != VNOVAL)) 490 error = tmpfs_chsize(vp, vap->va_size, cred, l->l_proc); 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, 494 l->l_proc); 495 496 if (error == 0 && (vap->va_mode != VNOVAL)) 497 error = tmpfs_chmod(vp, vap->va_mode, cred, l->l_proc); 498 499 if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 500 vap->va_atime.tv_nsec != VNOVAL) || 501 (vap->va_mtime.tv_sec != VNOVAL && 502 vap->va_mtime.tv_nsec != VNOVAL))) 503 error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 504 vap->va_vaflags, cred, l); 505 506 /* Update the node times. We give preference to the error codes 507 * generated by this function rather than the ones that may arise 508 * from tmpfs_update. */ 509 tmpfs_update(vp, NULL, NULL, 0); 510 511 KASSERT(VOP_ISLOCKED(vp)); 512 513 return error; 514 } 515 516 /* --------------------------------------------------------------------- */ 517 518 int 519 tmpfs_read(void *v) 520 { 521 struct vnode *vp = ((struct vop_read_args *)v)->a_vp; 522 struct uio *uio = ((struct vop_read_args *)v)->a_uio; 523 524 int error; 525 int flags; 526 struct tmpfs_node *node; 527 struct uvm_object *uobj; 528 529 KASSERT(VOP_ISLOCKED(vp)); 530 531 node = VP_TO_TMPFS_NODE(vp); 532 533 if (vp->v_type != VREG) { 534 error = EISDIR; 535 goto out; 536 } 537 538 if (uio->uio_offset < 0) { 539 error = EINVAL; 540 goto out; 541 } 542 543 node->tn_status |= TMPFS_NODE_ACCESSED; 544 545 uobj = node->tn_spec.tn_reg.tn_aobj; 546 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 547 error = 0; 548 while (error == 0 && uio->uio_resid > 0) { 549 vsize_t len; 550 void *win; 551 552 if (node->tn_size <= uio->uio_offset) 553 break; 554 555 len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); 556 if (len == 0) 557 break; 558 559 win = ubc_alloc(uobj, uio->uio_offset, &len, UVM_ADV_NORMAL, 560 UBC_READ); 561 error = uiomove(win, len, uio); 562 ubc_release(win, flags); 563 } 564 565 out: 566 KASSERT(VOP_ISLOCKED(vp)); 567 568 return error; 569 } 570 571 /* --------------------------------------------------------------------- */ 572 573 int 574 tmpfs_write(void *v) 575 { 576 struct vnode *vp = ((struct vop_write_args *)v)->a_vp; 577 struct uio *uio = ((struct vop_write_args *)v)->a_uio; 578 int ioflag = ((struct vop_write_args *)v)->a_ioflag; 579 580 boolean_t extended; 581 int error; 582 int flags; 583 off_t oldsize; 584 struct tmpfs_node *node; 585 struct uvm_object *uobj; 586 587 KASSERT(VOP_ISLOCKED(vp)); 588 589 node = VP_TO_TMPFS_NODE(vp); 590 oldsize = node->tn_size; 591 592 if (uio->uio_offset < 0 || vp->v_type != VREG) { 593 error = EINVAL; 594 goto out; 595 } 596 597 if (uio->uio_resid == 0) { 598 error = 0; 599 goto out; 600 } 601 602 if (ioflag & IO_APPEND) 603 uio->uio_offset = node->tn_size; 604 605 extended = uio->uio_offset + uio->uio_resid > node->tn_size; 606 if (extended) { 607 error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 608 if (error != 0) 609 goto out; 610 } 611 612 uobj = node->tn_spec.tn_reg.tn_aobj; 613 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 614 error = 0; 615 while (error == 0 && uio->uio_resid > 0) { 616 vsize_t len; 617 void *win; 618 619 len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); 620 if (len == 0) 621 break; 622 623 win = ubc_alloc(uobj, uio->uio_offset, &len, UVM_ADV_NORMAL, 624 UBC_WRITE); 625 error = uiomove(win, len, uio); 626 ubc_release(win, flags); 627 } 628 629 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 630 (extended ? TMPFS_NODE_CHANGED : 0); 631 632 if (error != 0) 633 (void)tmpfs_reg_resize(vp, oldsize); 634 635 out: 636 KASSERT(VOP_ISLOCKED(vp)); 637 KASSERT(IMPLIES(error == 0, uio->uio_resid == 0)); 638 KASSERT(IMPLIES(error != 0, oldsize == node->tn_size)); 639 640 return error; 641 } 642 643 /* --------------------------------------------------------------------- */ 644 645 int 646 tmpfs_fsync(void *v) 647 { 648 struct vnode *vp = ((struct vop_fsync_args *)v)->a_vp; 649 650 KASSERT(VOP_ISLOCKED(vp)); 651 652 tmpfs_update(vp, NULL, NULL, 0); 653 654 return 0; 655 } 656 657 /* --------------------------------------------------------------------- */ 658 659 int 660 tmpfs_remove(void *v) 661 { 662 struct vnode *dvp = ((struct vop_remove_args *)v)->a_dvp; 663 struct vnode *vp = ((struct vop_remove_args *)v)->a_vp; 664 665 int error; 666 struct tmpfs_dirent *de; 667 struct tmpfs_mount *tmp; 668 struct tmpfs_node *dnode; 669 struct tmpfs_node *node; 670 671 KASSERT(VOP_ISLOCKED(dvp)); 672 KASSERT(VOP_ISLOCKED(vp)); 673 674 dnode = VP_TO_TMPFS_DIR(dvp); 675 node = VP_TO_TMPFS_NODE(vp); 676 tmp = VFS_TO_TMPFS(vp->v_mount); 677 de = node->tn_lookup_dirent; 678 KASSERT(de != NULL); 679 680 /* XXX: Why isn't this done by the caller? */ 681 if (vp->v_type == VDIR) { 682 error = EISDIR; 683 goto out; 684 } 685 686 /* Files marked as immutable or append-only cannot be deleted. */ 687 if (node->tn_flags & (IMMUTABLE | APPEND)) { 688 error = EPERM; 689 goto out; 690 } 691 692 /* Remove the entry from the directory; as it is a file, we do not 693 * have to change the number of hard links of the directory. */ 694 tmpfs_dir_detach(dvp, de); 695 696 /* Notify interested parties about the modification of dvp. 697 * The removal of vp is notified when it is reclaimed. */ 698 VN_KNOTE(dvp, NOTE_WRITE); 699 700 /* Free the directory entry we just deleted. Note that the node 701 * referred by it will not be removed until the vnode is really 702 * reclaimed. */ 703 tmpfs_free_dirent(tmp, de, TRUE); 704 705 error = 0; 706 707 out: 708 vput(dvp); 709 vput(vp); 710 711 KASSERT(!VOP_ISLOCKED(dvp)); 712 713 return error; 714 } 715 716 /* --------------------------------------------------------------------- */ 717 718 int 719 tmpfs_link(void *v) 720 { 721 struct vnode *dvp = ((struct vop_link_args *)v)->a_dvp; 722 struct vnode *vp = ((struct vop_link_args *)v)->a_vp; 723 struct componentname *cnp = ((struct vop_link_args *)v)->a_cnp; 724 725 int error; 726 struct tmpfs_dirent *de; 727 struct tmpfs_node *dnode; 728 struct tmpfs_node *node; 729 730 KASSERT(VOP_ISLOCKED(dvp)); 731 KASSERT(!VOP_ISLOCKED(vp)); 732 KASSERT(cnp->cn_flags & HASBUF); 733 KASSERT(dvp != vp); /* XXX When can this be false? */ 734 735 dnode = VP_TO_TMPFS_DIR(dvp); 736 node = VP_TO_TMPFS_NODE(vp); 737 738 /* Lock vp because we will need to run tmpfs_update over it, which 739 * needs the vnode to be locked. */ 740 error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 741 if (error != 0) 742 goto out; 743 744 /* XXX: Why aren't the following two tests done by the caller? */ 745 746 /* Hard links of directories are forbidden. */ 747 if (vp->v_type == VDIR) { 748 error = EPERM; 749 goto out; 750 } 751 752 /* Cannot create cross-device links. */ 753 if (dvp->v_mount != vp->v_mount) { 754 error = EXDEV; 755 goto out; 756 } 757 758 /* Ensure that we do not overflow the maximum number of links imposed 759 * by the system. */ 760 KASSERT(node->tn_links <= LINK_MAX); 761 if (node->tn_links == LINK_MAX) { 762 error = EMLINK; 763 goto out; 764 } 765 766 /* We cannot create links of files marked immutable or append-only. */ 767 if (node->tn_flags & (IMMUTABLE | APPEND)) { 768 error = EPERM; 769 goto out; 770 } 771 772 /* Allocate a new directory entry to represent the node. */ 773 error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 774 cnp->cn_nameptr, cnp->cn_namelen, &de); 775 if (error != 0) 776 goto out; 777 778 /* Insert the new directory entry into the appropriate directory. */ 779 tmpfs_dir_attach(dvp, de); 780 VN_KNOTE(dvp, NOTE_WRITE); 781 782 /* vp link count has changed, so update node times. */ 783 node->tn_status |= TMPFS_NODE_CHANGED; 784 tmpfs_update(vp, NULL, NULL, 0); 785 786 error = 0; 787 788 out: 789 if (VOP_ISLOCKED(vp)) 790 VOP_UNLOCK(vp, 0); 791 792 PNBUF_PUT(cnp->cn_pnbuf); 793 794 vput(dvp); 795 796 /* XXX Locking status of dvp does not match manual page. */ 797 KASSERT(!VOP_ISLOCKED(dvp)); 798 KASSERT(!VOP_ISLOCKED(vp)); 799 800 return error; 801 } 802 803 /* --------------------------------------------------------------------- */ 804 805 int 806 tmpfs_rename(void *v) 807 { 808 struct vnode *fdvp = ((struct vop_rename_args *)v)->a_fdvp; 809 struct vnode *fvp = ((struct vop_rename_args *)v)->a_fvp; 810 struct componentname *fcnp = ((struct vop_rename_args *)v)->a_fcnp; 811 struct vnode *tdvp = ((struct vop_rename_args *)v)->a_tdvp; 812 struct vnode *tvp = ((struct vop_rename_args *)v)->a_tvp; 813 struct componentname *tcnp = ((struct vop_rename_args *)v)->a_tcnp; 814 815 char *newname; 816 int error; 817 struct tmpfs_dirent *de; 818 struct tmpfs_mount *tmp; 819 struct tmpfs_node *fdnode; 820 struct tmpfs_node *fnode; 821 struct tmpfs_node *tdnode; 822 823 KASSERT(VOP_ISLOCKED(tdvp)); 824 KASSERT(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 825 KASSERT(fcnp->cn_flags & HASBUF); 826 KASSERT(tcnp->cn_flags & HASBUF); 827 828 fdnode = VP_TO_TMPFS_DIR(fdvp); 829 fnode = VP_TO_TMPFS_NODE(fvp); 830 de = fnode->tn_lookup_dirent; 831 832 /* Disallow cross-device renames. 833 * XXX Why isn't this done by the caller? */ 834 if (fvp->v_mount != tdvp->v_mount || 835 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 836 error = EXDEV; 837 goto out; 838 } 839 840 tmp = VFS_TO_TMPFS(tdvp->v_mount); 841 tdnode = VP_TO_TMPFS_DIR(tdvp); 842 843 /* If source and target are the same file, there is nothing to do. */ 844 if (fvp == tvp) { 845 error = 0; 846 goto out; 847 } 848 849 /* Avoid manipulating '.' and '..' entries. */ 850 if (de == NULL) { 851 KASSERT(fvp->v_type == VDIR); 852 error = EINVAL; 853 goto out; 854 } 855 KASSERT(de->td_node == fnode); 856 857 /* If we need to move the directory between entries, lock the 858 * source so that we can safely operate on it. */ 859 if (fdnode != tdnode) { 860 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 861 if (error != 0) 862 goto out; 863 } 864 865 /* Ensure that we have enough memory to hold the new name, if it 866 * has to be changed. */ 867 if (fcnp->cn_namelen != tcnp->cn_namelen || 868 memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 869 newname = tmpfs_str_pool_get(&tmp->tm_str_pool, 870 tcnp->cn_namelen, 0); 871 if (newname == NULL) { 872 error = ENOSPC; 873 goto out_locked; 874 } 875 } else 876 newname = NULL; 877 878 /* If the node is being moved to another directory, we have to do 879 * the move. */ 880 if (fdnode != tdnode) { 881 /* In case we are moving a directory, we have to adjust its 882 * parent to point to the new parent. */ 883 if (de->td_node->tn_type == VDIR) { 884 struct tmpfs_node *n; 885 886 /* Ensure the target directory is not a child of the 887 * directory being moved. Otherwise, we'd end up 888 * with stale nodes. */ 889 n = tdnode; 890 while (n != n->tn_spec.tn_dir.tn_parent) { 891 if (n == fnode) { 892 error = EINVAL; 893 goto out_locked; 894 } 895 n = n->tn_spec.tn_dir.tn_parent; 896 } 897 898 /* Adjust the parent pointer. */ 899 TMPFS_VALIDATE_DIR(fnode); 900 de->td_node->tn_spec.tn_dir.tn_parent = tdnode; 901 902 /* As a result of changing the target of the '..' 903 * entry, the link count of the source and target 904 * directories has to be adjusted. */ 905 fdnode->tn_links--; 906 tdnode->tn_links++; 907 } 908 909 /* Do the move: just remove the entry from the source directory 910 * and insert it into the target one. */ 911 tmpfs_dir_detach(fdvp, de); 912 tmpfs_dir_attach(tdvp, de); 913 914 /* Notify listeners of fdvp about the change in the directory. 915 * We can do it at this point because we aren't touching fdvp 916 * any more below. */ 917 VN_KNOTE(fdvp, NOTE_WRITE); 918 } 919 920 /* If the name has changed, we need to make it effective by changing 921 * it in the directory entry. */ 922 if (newname != NULL) { 923 KASSERT(tcnp->cn_namelen < MAXNAMLEN); 924 KASSERT(tcnp->cn_namelen < 0xffff); 925 926 tmpfs_str_pool_put(&tmp->tm_str_pool, de->td_name, 927 de->td_namelen); 928 de->td_namelen = (uint16_t)tcnp->cn_namelen; 929 memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 930 de->td_name = newname; 931 932 fnode->tn_status |= TMPFS_NODE_MODIFIED; 933 } 934 935 /* If we are overwriting an entry, we have to remove the old one 936 * from the target directory. */ 937 if (tvp != NULL) { 938 struct tmpfs_node *tnode; 939 940 tnode = VP_TO_TMPFS_NODE(tvp); 941 942 /* The source node cannot be a directory in this case. */ 943 KASSERT(fnode->tn_type != VDIR); 944 945 /* Remove the old entry from the target directory. */ 946 de = tnode->tn_lookup_dirent; 947 tmpfs_dir_detach(tdvp, de); 948 949 /* Free the directory entry we just deleted. Note that the 950 * node referred by it will not be removed until the vnode is 951 * really reclaimed. */ 952 tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 953 } 954 955 /* Notify listeners of tdvp about the change in the directory (either 956 * because a new entry was added or because one was removed). */ 957 VN_KNOTE(tdvp, NOTE_WRITE); 958 959 error = 0; 960 961 out_locked: 962 if (fdnode != tdnode) 963 VOP_UNLOCK(fdvp, 0); 964 965 out: 966 /* Release target nodes. */ 967 /* XXX: I don't understand when tdvp can be the same as tvp, but 968 * other code takes care of this... */ 969 if (tdvp == tvp) 970 vrele(tdvp); 971 else 972 vput(tdvp); 973 if (tvp != NULL) 974 vput(tvp); 975 976 /* Release source nodes. */ 977 vrele(fdvp); 978 vrele(fvp); 979 980 return error; 981 } 982 983 /* --------------------------------------------------------------------- */ 984 985 int 986 tmpfs_mkdir(void *v) 987 { 988 struct vnode *dvp = ((struct vop_mkdir_args *)v)->a_dvp; 989 struct vnode **vpp = ((struct vop_mkdir_args *)v)->a_vpp; 990 struct componentname *cnp = ((struct vop_mkdir_args *)v)->a_cnp; 991 struct vattr *vap = ((struct vop_mkdir_args *)v)->a_vap; 992 993 KASSERT(vap->va_type == VDIR); 994 995 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 996 } 997 998 /* --------------------------------------------------------------------- */ 999 1000 int 1001 tmpfs_rmdir(void *v) 1002 { 1003 struct vnode *dvp = ((struct vop_rmdir_args *)v)->a_dvp; 1004 struct vnode *vp = ((struct vop_rmdir_args *)v)->a_vp; 1005 1006 int error; 1007 struct tmpfs_dirent *de; 1008 struct tmpfs_mount *tmp; 1009 struct tmpfs_node *dnode; 1010 struct tmpfs_node *node; 1011 1012 KASSERT(VOP_ISLOCKED(dvp)); 1013 KASSERT(VOP_ISLOCKED(vp)); 1014 1015 tmp = VFS_TO_TMPFS(dvp->v_mount); 1016 dnode = VP_TO_TMPFS_DIR(dvp); 1017 node = VP_TO_TMPFS_DIR(vp); 1018 KASSERT(node->tn_spec.tn_dir.tn_parent == dnode); 1019 1020 /* Get the directory entry associated with node (vp). This was 1021 * filled by tmpfs_lookup while looking up the entry. */ 1022 de = node->tn_lookup_dirent; 1023 KASSERT(TMPFS_DIRENT_MATCHES(de, 1024 ((struct vop_rmdir_args *)v)->a_cnp->cn_nameptr, 1025 ((struct vop_rmdir_args *)v)->a_cnp->cn_namelen)); 1026 1027 /* Directories with more than two entries ('.' and '..') cannot be 1028 * removed. */ 1029 if (node->tn_size > 0) { 1030 error = ENOTEMPTY; 1031 goto out; 1032 } 1033 1034 /* Check flags to see if we are allowed to remove the directory. */ 1035 if (dnode->tn_flags & APPEND || node->tn_flags & (IMMUTABLE | APPEND)) { 1036 error = EPERM; 1037 goto out; 1038 } 1039 1040 /* Detach the directory entry from the directory (dnode). */ 1041 tmpfs_dir_detach(dvp, de); 1042 1043 node->tn_links--; 1044 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1045 TMPFS_NODE_MODIFIED; 1046 node->tn_spec.tn_dir.tn_parent->tn_links--; 1047 node->tn_spec.tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1048 TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1049 1050 /* Notify modification of parent directory and release it. */ 1051 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1052 cache_purge(dvp); /* XXX Is this needed? */ 1053 vput(dvp); 1054 1055 /* Free the directory entry we just deleted. Note that the node 1056 * referred by it will not be removed until the vnode is really 1057 * reclaimed. */ 1058 tmpfs_free_dirent(tmp, de, TRUE); 1059 1060 /* Release the deleted vnode (will destroy the node, notify 1061 * interested parties and clean it from the cache). */ 1062 vput(vp); 1063 1064 error = 0; 1065 1066 out: 1067 if (error != 0) { 1068 vput(dvp); 1069 vput(vp); 1070 } 1071 1072 return error; 1073 } 1074 1075 /* --------------------------------------------------------------------- */ 1076 1077 int 1078 tmpfs_symlink(void *v) 1079 { 1080 struct vnode *dvp = ((struct vop_symlink_args *)v)->a_dvp; 1081 struct vnode **vpp = ((struct vop_symlink_args *)v)->a_vpp; 1082 struct componentname *cnp = ((struct vop_symlink_args *)v)->a_cnp; 1083 struct vattr *vap = ((struct vop_symlink_args *)v)->a_vap; 1084 char *target = ((struct vop_symlink_args *)v)->a_target; 1085 1086 KASSERT(vap->va_type == VLNK); 1087 1088 return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1089 } 1090 1091 /* --------------------------------------------------------------------- */ 1092 1093 int 1094 tmpfs_readdir(void *v) 1095 { 1096 struct vnode *vp = ((struct vop_readdir_args *)v)->a_vp; 1097 struct uio *uio = ((struct vop_readdir_args *)v)->a_uio; 1098 int *eofflag = ((struct vop_readdir_args *)v)->a_eofflag; 1099 off_t **cookies = ((struct vop_readdir_args *)v)->a_cookies; 1100 int *ncookies = ((struct vop_readdir_args *)v)->a_ncookies; 1101 1102 int error; 1103 off_t startoff; 1104 off_t cnt; 1105 struct tmpfs_node *node; 1106 1107 KASSERT(VOP_ISLOCKED(vp)); 1108 1109 /* This operation only makes sense on directory nodes. */ 1110 if (vp->v_type != VDIR) { 1111 error = ENOTDIR; 1112 goto out; 1113 } 1114 1115 node = VP_TO_TMPFS_DIR(vp); 1116 1117 startoff = uio->uio_offset; 1118 1119 cnt = 0; 1120 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1121 error = tmpfs_dir_getdotdent(node, uio); 1122 if (error == -1) { 1123 error = 0; 1124 goto outok; 1125 } else if (error != 0) 1126 goto outok; 1127 cnt++; 1128 } 1129 1130 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1131 error = tmpfs_dir_getdotdotdent(node, uio); 1132 if (error == -1) { 1133 error = 0; 1134 goto outok; 1135 } else if (error != 0) 1136 goto outok; 1137 cnt++; 1138 } 1139 1140 error = tmpfs_dir_getdents(node, uio, &cnt); 1141 if (error == -1) 1142 error = 0; 1143 KASSERT(error >= 0); 1144 1145 outok: 1146 /* This label assumes that startoff has been 1147 * initialized. If the compiler didn't spit out warnings, we'd 1148 * simply make this one be 'out' and drop 'outok'. */ 1149 1150 if (eofflag != NULL) 1151 *eofflag = 1152 (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1153 1154 /* Update NFS-related variables. */ 1155 if (error == 0 && cookies != NULL && ncookies != NULL) { 1156 off_t i; 1157 off_t off = startoff; 1158 struct tmpfs_dirent *de = NULL; 1159 1160 *ncookies = cnt; 1161 *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1162 1163 for (i = 0; i < cnt; i++) { 1164 KASSERT(off != TMPFS_DIRCOOKIE_EOF); 1165 if (off == TMPFS_DIRCOOKIE_DOT) { 1166 off = TMPFS_DIRCOOKIE_DOTDOT; 1167 } else { 1168 if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1169 de = TAILQ_FIRST(&node->tn_spec. 1170 tn_dir.tn_dir); 1171 } else if (de != NULL) { 1172 de = TAILQ_NEXT(de, td_entries); 1173 } else { 1174 de = tmpfs_dir_lookupbycookie(node, 1175 off); 1176 KASSERT(de != NULL); 1177 de = TAILQ_NEXT(de, td_entries); 1178 } 1179 if (de == NULL) { 1180 off = TMPFS_DIRCOOKIE_EOF; 1181 } else { 1182 off = TMPFS_DIRCOOKIE(de); 1183 } 1184 } 1185 1186 (*cookies)[i] = off; 1187 } 1188 KASSERT(uio->uio_offset == off); 1189 } 1190 1191 out: 1192 KASSERT(VOP_ISLOCKED(vp)); 1193 1194 return error; 1195 } 1196 1197 /* --------------------------------------------------------------------- */ 1198 1199 int 1200 tmpfs_readlink(void *v) 1201 { 1202 struct vnode *vp = ((struct vop_readlink_args *)v)->a_vp; 1203 struct uio *uio = ((struct vop_readlink_args *)v)->a_uio; 1204 1205 int error; 1206 struct tmpfs_node *node; 1207 1208 KASSERT(VOP_ISLOCKED(vp)); 1209 KASSERT(uio->uio_offset == 0); 1210 KASSERT(vp->v_type == VLNK); 1211 1212 node = VP_TO_TMPFS_NODE(vp); 1213 1214 error = uiomove(node->tn_spec.tn_lnk.tn_link, 1215 MIN(node->tn_size, uio->uio_resid), uio); 1216 node->tn_status |= TMPFS_NODE_ACCESSED; 1217 1218 KASSERT(VOP_ISLOCKED(vp)); 1219 1220 return error; 1221 } 1222 1223 /* --------------------------------------------------------------------- */ 1224 1225 int 1226 tmpfs_inactive(void *v) 1227 { 1228 struct vnode *vp = ((struct vop_inactive_args *)v)->a_vp; 1229 struct lwp *l = ((struct vop_inactive_args *)v)->a_l; 1230 1231 struct tmpfs_node *node; 1232 1233 KASSERT(VOP_ISLOCKED(vp)); 1234 1235 node = VP_TO_TMPFS_NODE(vp); 1236 1237 VOP_UNLOCK(vp, 0); 1238 1239 if (node->tn_links == 0) 1240 vrecycle(vp, NULL, l); 1241 1242 return 0; 1243 } 1244 1245 /* --------------------------------------------------------------------- */ 1246 1247 int 1248 tmpfs_reclaim(void *v) 1249 { 1250 struct vnode *vp = ((struct vop_reclaim_args *)v)->a_vp; 1251 1252 struct tmpfs_mount *tmp; 1253 struct tmpfs_node *node; 1254 1255 KASSERT(!VOP_ISLOCKED(vp)); 1256 1257 node = VP_TO_TMPFS_NODE(vp); 1258 tmp = VFS_TO_TMPFS(vp->v_mount); 1259 1260 if (node->tn_links == 0) 1261 VN_KNOTE(vp, NOTE_DELETE); 1262 1263 cache_purge(vp); 1264 tmpfs_free_vp(vp); 1265 1266 /* If the node referenced by this vnode was deleted by the user, 1267 * we must free its associated data structures (now that the vnode 1268 * is being reclaimed). */ 1269 if (node->tn_links == 0) 1270 tmpfs_free_node(tmp, node); 1271 1272 KASSERT(!VOP_ISLOCKED(vp)); 1273 KASSERT(vp->v_data == NULL); 1274 1275 return 0; 1276 } 1277 1278 /* --------------------------------------------------------------------- */ 1279 1280 int 1281 tmpfs_print(void *v) 1282 { 1283 struct vnode *vp = ((struct vop_print_args *)v)->a_vp; 1284 1285 struct tmpfs_node *node; 1286 1287 node = VP_TO_TMPFS_NODE(vp); 1288 1289 printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1290 node, node->tn_flags, node->tn_links); 1291 printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1292 ", status 0x%x\n", 1293 node->tn_mode, node->tn_uid, node->tn_gid, 1294 (uintmax_t)node->tn_size, node->tn_status); 1295 1296 if (vp->v_type == VFIFO) 1297 fifo_printinfo(vp); 1298 lockmgr_printinfo(&vp->v_lock); 1299 1300 printf("\n"); 1301 1302 return 0; 1303 } 1304 1305 /* --------------------------------------------------------------------- */ 1306 1307 int 1308 tmpfs_pathconf(void *v) 1309 { 1310 int name = ((struct vop_pathconf_args *)v)->a_name; 1311 register_t *retval = ((struct vop_pathconf_args *)v)->a_retval; 1312 1313 int error; 1314 1315 error = 0; 1316 1317 switch (name) { 1318 case _PC_LINK_MAX: 1319 *retval = LINK_MAX; 1320 break; 1321 1322 case _PC_NAME_MAX: 1323 *retval = NAME_MAX; 1324 break; 1325 1326 case _PC_PATH_MAX: 1327 *retval = PATH_MAX; 1328 break; 1329 1330 case _PC_PIPE_BUF: 1331 *retval = PIPE_BUF; 1332 break; 1333 1334 case _PC_CHOWN_RESTRICTED: 1335 *retval = 1; 1336 break; 1337 1338 case _PC_NO_TRUNC: 1339 *retval = 1; 1340 break; 1341 1342 case _PC_SYNC_IO: 1343 *retval = 1; 1344 break; 1345 1346 case _PC_FILESIZEBITS: 1347 *retval = 0; /* XXX Don't know which value should I return. */ 1348 break; 1349 1350 default: 1351 error = EINVAL; 1352 } 1353 1354 return error; 1355 } 1356 1357 /* --------------------------------------------------------------------- */ 1358 1359 int 1360 tmpfs_advlock(void *v) 1361 { 1362 struct vnode *vp = ((struct vop_advlock_args *)v)->a_vp; 1363 1364 struct tmpfs_node *node; 1365 1366 node = VP_TO_TMPFS_NODE(vp); 1367 1368 return lf_advlock(v, &node->tn_lockf, node->tn_size); 1369 } 1370 1371 /* --------------------------------------------------------------------- */ 1372 1373 int 1374 tmpfs_getpages(void *v) 1375 { 1376 struct vnode *vp = ((struct vop_getpages_args *)v)->a_vp; 1377 voff_t offset = ((struct vop_getpages_args *)v)->a_offset; 1378 struct vm_page **m = ((struct vop_getpages_args *)v)->a_m; 1379 int *count = ((struct vop_getpages_args *)v)->a_count; 1380 int centeridx = ((struct vop_getpages_args *)v)->a_centeridx; 1381 vm_prot_t access_type = ((struct vop_getpages_args *)v)->a_access_type; 1382 int advice = ((struct vop_getpages_args *)v)->a_advice; 1383 int flags = ((struct vop_getpages_args *)v)->a_flags; 1384 1385 int error; 1386 struct tmpfs_node *node; 1387 struct uvm_object *uobj; 1388 int npages = *count; 1389 1390 KASSERT(vp->v_type == VREG); 1391 LOCK_ASSERT(simple_lock_held(&vp->v_interlock)); 1392 1393 node = VP_TO_TMPFS_NODE(vp); 1394 uobj = node->tn_spec.tn_reg.tn_aobj; 1395 1396 /* We currently don't rely on PGO_PASTEOF. */ 1397 1398 if (vp->v_size <= offset + (centeridx << PAGE_SHIFT)) { 1399 if ((flags & PGO_LOCKED) == 0) 1400 simple_unlock(&vp->v_interlock); 1401 return EINVAL; 1402 } 1403 1404 if (vp->v_size < offset + (npages << PAGE_SHIFT)) { 1405 npages = (round_page(vp->v_size) - offset) >> PAGE_SHIFT; 1406 } 1407 1408 if ((flags & PGO_LOCKED) != 0) 1409 return EBUSY; 1410 1411 if ((flags & PGO_NOTIMESTAMP) == 0) { 1412 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1413 node->tn_status |= TMPFS_NODE_ACCESSED; 1414 1415 if ((access_type & VM_PROT_WRITE) != 0) 1416 node->tn_status |= TMPFS_NODE_MODIFIED; 1417 } 1418 1419 simple_unlock(&vp->v_interlock); 1420 1421 simple_lock(&uobj->vmobjlock); 1422 error = (*uobj->pgops->pgo_get)(uobj, offset, m, &npages, centeridx, 1423 access_type, advice, flags); 1424 1425 return error; 1426 } 1427 1428 /* --------------------------------------------------------------------- */ 1429 1430 int 1431 tmpfs_putpages(void *v) 1432 { 1433 struct vnode *vp = ((struct vop_putpages_args *)v)->a_vp; 1434 voff_t offlo = ((struct vop_putpages_args *)v)->a_offlo; 1435 voff_t offhi = ((struct vop_putpages_args *)v)->a_offhi; 1436 int flags = ((struct vop_putpages_args *)v)->a_flags; 1437 1438 int error; 1439 struct tmpfs_node *node; 1440 struct uvm_object *uobj; 1441 1442 LOCK_ASSERT(simple_lock_held(&vp->v_interlock)); 1443 1444 node = VP_TO_TMPFS_NODE(vp); 1445 1446 if (vp->v_type != VREG) { 1447 simple_unlock(&vp->v_interlock); 1448 return 0; 1449 } 1450 1451 uobj = node->tn_spec.tn_reg.tn_aobj; 1452 simple_unlock(&vp->v_interlock); 1453 1454 simple_lock(&uobj->vmobjlock); 1455 error = (*uobj->pgops->pgo_put)(uobj, offlo, offhi, flags); 1456 1457 /* XXX mtime */ 1458 1459 return error; 1460 } 1461