1 /* $NetBSD: udf_vnops.c,v 1.85 2013/07/10 15:10:56 reinoud Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Generic parts are derived from software contributed to The NetBSD Foundation 28 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 29 * 2005 program. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __KERNEL_RCSID(0, "$NetBSD: udf_vnops.c,v 1.85 2013/07/10 15:10:56 reinoud Exp $"); 36 #endif /* not lint */ 37 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 43 #include <sys/kernel.h> 44 #include <sys/file.h> /* define FWRITE ... */ 45 #include <sys/stat.h> 46 #include <sys/buf.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/lockf.h> 54 #include <sys/kauth.h> 55 56 #include <miscfs/genfs/genfs.h> 57 #include <uvm/uvm_extern.h> 58 59 #include <fs/udf/ecma167-udf.h> 60 #include <fs/udf/udf_mount.h> 61 #include <sys/dirhash.h> 62 63 #include "udf.h" 64 #include "udf_subr.h" 65 #include "udf_bswap.h" 66 67 68 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data) 69 70 71 /* externs */ 72 extern int prtactive; 73 74 /* implementations of vnode functions; table follows at end */ 75 /* --------------------------------------------------------------------- */ 76 77 int 78 udf_inactive(void *v) 79 { 80 struct vop_inactive_args /* { 81 struct vnode *a_vp; 82 bool *a_recycle; 83 } */ *ap = v; 84 struct vnode *vp = ap->a_vp; 85 struct udf_node *udf_node = VTOI(vp); 86 int refcnt; 87 88 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 89 90 if (udf_node == NULL) { 91 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 92 VOP_UNLOCK(vp); 93 return 0; 94 } 95 96 /* 97 * Optionally flush metadata to disc. If the file has not been 98 * referenced anymore in a directory we ought to free up the resources 99 * on disc if applicable. 100 */ 101 if (udf_node->fe) { 102 refcnt = udf_rw16(udf_node->fe->link_cnt); 103 } else { 104 assert(udf_node->efe); 105 refcnt = udf_rw16(udf_node->efe->link_cnt); 106 } 107 108 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 109 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 110 /* system nodes are not writen out on inactive, so flush */ 111 udf_node->i_flags = 0; 112 } 113 114 *ap->a_recycle = false; 115 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 116 /* remove this file's allocation */ 117 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 118 *ap->a_recycle = true; 119 udf_delete_node(udf_node); 120 VOP_UNLOCK(vp); 121 vrecycle(vp, NULL, curlwp); 122 return 0; 123 } 124 125 /* write out its node */ 126 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 127 udf_update(vp, NULL, NULL, NULL, 0); 128 VOP_UNLOCK(vp); 129 130 return 0; 131 } 132 133 /* --------------------------------------------------------------------- */ 134 135 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 136 137 int 138 udf_reclaim(void *v) 139 { 140 struct vop_reclaim_args /* { 141 struct vnode *a_vp; 142 } */ *ap = v; 143 struct vnode *vp = ap->a_vp; 144 struct udf_node *udf_node = VTOI(vp); 145 146 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 147 if (prtactive && vp->v_usecount > 1) 148 vprint("udf_reclaim(): pushing active", vp); 149 150 if (udf_node == NULL) { 151 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 152 return 0; 153 } 154 155 /* update note for closure */ 156 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 157 158 /* async check to see if all node descriptors are written out */ 159 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 160 vprint("udf_reclaim(): waiting for writeout\n", vp); 161 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 162 } 163 164 /* dispose all node knowledge */ 165 udf_dispose_node(udf_node); 166 167 return 0; 168 } 169 170 /* --------------------------------------------------------------------- */ 171 172 int 173 udf_read(void *v) 174 { 175 struct vop_read_args /* { 176 struct vnode *a_vp; 177 struct uio *a_uio; 178 int a_ioflag; 179 kauth_cred_t a_cred; 180 } */ *ap = v; 181 struct vnode *vp = ap->a_vp; 182 struct uio *uio = ap->a_uio; 183 int ioflag = ap->a_ioflag; 184 int advice = IO_ADV_DECODE(ap->a_ioflag); 185 struct uvm_object *uobj; 186 struct udf_node *udf_node = VTOI(vp); 187 struct file_entry *fe; 188 struct extfile_entry *efe; 189 uint64_t file_size; 190 vsize_t len; 191 int error; 192 193 /* 194 * XXX reading from extended attributes not yet implemented. FreeBSD 195 * has it in mind to forward the IO_EXT read call to the 196 * VOP_READEXTATTR(). 197 */ 198 199 DPRINTF(READ, ("udf_read called\n")); 200 201 /* can this happen? some filingsystems have this check */ 202 if (uio->uio_offset < 0) 203 return EINVAL; 204 if (uio->uio_resid == 0) 205 return 0; 206 207 /* protect against rogue programs reading raw directories and links */ 208 if ((ioflag & IO_ALTSEMANTICS) == 0) { 209 if (vp->v_type == VDIR) 210 return EISDIR; 211 /* all but regular files just give EINVAL */ 212 if (vp->v_type != VREG) 213 return EINVAL; 214 } 215 216 assert(udf_node); 217 assert(udf_node->fe || udf_node->efe); 218 219 /* get file/directory filesize */ 220 if (udf_node->fe) { 221 fe = udf_node->fe; 222 file_size = udf_rw64(fe->inf_len); 223 } else { 224 assert(udf_node->efe); 225 efe = udf_node->efe; 226 file_size = udf_rw64(efe->inf_len); 227 } 228 229 /* read contents using buffercache */ 230 uobj = &vp->v_uobj; 231 error = 0; 232 while (uio->uio_resid > 0) { 233 /* reached end? */ 234 if (file_size <= uio->uio_offset) 235 break; 236 237 /* maximise length to file extremity */ 238 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 239 if (len == 0) 240 break; 241 242 /* ubc, here we come, prepare to trap */ 243 error = ubc_uiomove(uobj, uio, len, advice, 244 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 245 if (error) 246 break; 247 } 248 249 /* note access time unless not requested */ 250 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 251 udf_node->i_flags |= IN_ACCESS; 252 if ((ioflag & IO_SYNC) == IO_SYNC) 253 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 254 } 255 256 return error; 257 } 258 259 /* --------------------------------------------------------------------- */ 260 261 int 262 udf_write(void *v) 263 { 264 struct vop_write_args /* { 265 struct vnode *a_vp; 266 struct uio *a_uio; 267 int a_ioflag; 268 kauth_cred_t a_cred; 269 } */ *ap = v; 270 struct vnode *vp = ap->a_vp; 271 struct uio *uio = ap->a_uio; 272 int ioflag = ap->a_ioflag; 273 kauth_cred_t cred = ap->a_cred; 274 int advice = IO_ADV_DECODE(ap->a_ioflag); 275 struct uvm_object *uobj; 276 struct udf_node *udf_node = VTOI(vp); 277 struct file_entry *fe; 278 struct extfile_entry *efe; 279 uint64_t file_size, old_size, old_offset; 280 vsize_t len; 281 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 282 int error; 283 int resid, extended; 284 285 /* 286 * XXX writing to extended attributes not yet implemented. FreeBSD has 287 * it in mind to forward the IO_EXT read call to the 288 * VOP_READEXTATTR(). 289 */ 290 291 DPRINTF(WRITE, ("udf_write called\n")); 292 293 /* can this happen? some filingsystems have this check */ 294 if (uio->uio_offset < 0) 295 return EINVAL; 296 if (uio->uio_resid == 0) 297 return 0; 298 299 /* protect against rogue programs writing raw directories or links */ 300 if ((ioflag & IO_ALTSEMANTICS) == 0) { 301 if (vp->v_type == VDIR) 302 return EISDIR; 303 /* all but regular files just give EINVAL for now */ 304 if (vp->v_type != VREG) 305 return EINVAL; 306 } 307 308 assert(udf_node); 309 assert(udf_node->fe || udf_node->efe); 310 311 /* get file/directory filesize */ 312 if (udf_node->fe) { 313 fe = udf_node->fe; 314 file_size = udf_rw64(fe->inf_len); 315 } else { 316 assert(udf_node->efe); 317 efe = udf_node->efe; 318 file_size = udf_rw64(efe->inf_len); 319 } 320 old_size = file_size; 321 322 /* if explicitly asked to append, uio_offset can be wrong? */ 323 if (ioflag & IO_APPEND) 324 uio->uio_offset = file_size; 325 326 extended = (uio->uio_offset + uio->uio_resid > file_size); 327 if (extended) { 328 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 329 file_size, uio->uio_offset + uio->uio_resid)); 330 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 331 if (error) 332 return error; 333 file_size = uio->uio_offset + uio->uio_resid; 334 } 335 336 /* write contents using buffercache */ 337 uobj = &vp->v_uobj; 338 resid = uio->uio_resid; 339 error = 0; 340 341 uvm_vnp_setwritesize(vp, file_size); 342 old_offset = uio->uio_offset; 343 while (uio->uio_resid > 0) { 344 /* maximise length to file extremity */ 345 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 346 if (len == 0) 347 break; 348 349 genfs_node_wrlock(vp); 350 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 351 genfs_node_unlock(vp); 352 if (error) 353 break; 354 355 /* ubc, here we come, prepare to trap */ 356 error = ubc_uiomove(uobj, uio, len, advice, 357 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 358 if (error) 359 break; 360 361 /* 362 * flush what we just wrote if necessary. 363 * XXXUBC simplistic async flushing. 364 * 365 * Directories are excluded since its file data that we want 366 * to purge. 367 */ 368 if ((vp->v_type != VDIR) && 369 (old_offset >> 16 != uio->uio_offset >> 16)) { 370 mutex_enter(vp->v_interlock); 371 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 372 (uio->uio_offset >> 16) << 16, 373 PGO_CLEANIT | PGO_LAZY); 374 old_offset = uio->uio_offset; 375 } 376 } 377 uvm_vnp_setsize(vp, file_size); 378 379 /* mark node changed and request update */ 380 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 381 if (vp->v_mount->mnt_flag & MNT_RELATIME) 382 udf_node->i_flags |= IN_ACCESS; 383 384 /* 385 * XXX TODO FFS has code here to reset setuid & setgid when we're not 386 * the superuser as a precaution against tampering. 387 */ 388 389 /* if we wrote a thing, note write action on vnode */ 390 if (resid > uio->uio_resid) 391 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 392 393 if (error) { 394 /* bring back file size to its former size */ 395 /* take notice of its errors? */ 396 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 397 398 /* roll back uio */ 399 uio->uio_offset -= resid - uio->uio_resid; 400 uio->uio_resid = resid; 401 } else { 402 /* if we write and we're synchronous, update node */ 403 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 404 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 405 } 406 407 return error; 408 } 409 410 411 /* --------------------------------------------------------------------- */ 412 413 /* 414 * `Special' bmap functionality that translates all incomming requests to 415 * translate to vop_strategy() calls with the same blocknumbers effectively 416 * not translating at all. 417 */ 418 419 int 420 udf_trivial_bmap(void *v) 421 { 422 struct vop_bmap_args /* { 423 struct vnode *a_vp; 424 daddr_t a_bn; 425 struct vnode **a_vpp; 426 daddr_t *a_bnp; 427 int *a_runp; 428 } */ *ap = v; 429 struct vnode *vp = ap->a_vp; /* our node */ 430 struct vnode **vpp = ap->a_vpp; /* return node */ 431 daddr_t *bnp = ap->a_bnp; /* translated */ 432 daddr_t bn = ap->a_bn; /* origional */ 433 int *runp = ap->a_runp; 434 struct udf_node *udf_node = VTOI(vp); 435 uint32_t lb_size; 436 437 /* get logical block size */ 438 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 439 440 /* could return `-1' to indicate holes/zeros */ 441 /* translate 1:1 */ 442 *bnp = bn; 443 444 /* set the vnode to read the data from with strategy on itself */ 445 if (vpp) 446 *vpp = vp; 447 448 /* set runlength of maximum block size */ 449 if (runp) 450 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 451 452 /* return success */ 453 return 0; 454 } 455 456 /* --------------------------------------------------------------------- */ 457 458 int 459 udf_vfsstrategy(void *v) 460 { 461 struct vop_strategy_args /* { 462 struct vnode *a_vp; 463 struct buf *a_bp; 464 } */ *ap = v; 465 struct vnode *vp = ap->a_vp; 466 struct buf *bp = ap->a_bp; 467 struct udf_node *udf_node = VTOI(vp); 468 uint32_t lb_size, from, sectors; 469 int error; 470 471 DPRINTF(STRATEGY, ("udf_strategy called\n")); 472 473 /* check if we ought to be here */ 474 if (vp->v_type == VBLK || vp->v_type == VCHR) 475 panic("udf_strategy: spec"); 476 477 /* only filebuffers ought to be read/write by this, no descriptors */ 478 assert(bp->b_blkno >= 0); 479 480 /* get sector size */ 481 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 482 483 /* calculate sector to start from */ 484 from = bp->b_blkno; 485 486 /* calculate length to fetch/store in sectors */ 487 sectors = bp->b_bcount / lb_size; 488 assert(bp->b_bcount > 0); 489 490 /* NEVER assume later that this buffer is already translated */ 491 /* bp->b_lblkno = bp->b_blkno; */ 492 493 /* check assertions: we OUGHT to always get multiples of this */ 494 assert(sectors * lb_size == bp->b_bcount); 495 496 /* issue buffer */ 497 error = 0; 498 if (bp->b_flags & B_READ) { 499 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 500 ", sector %d for %d sectors\n", 501 vp, bp, bp->b_blkno, from, sectors)); 502 503 /* read buffer from the udf_node, translate vtop on the way*/ 504 udf_read_filebuf(udf_node, bp); 505 } else { 506 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 507 ", sector %d for %d sectors\n", 508 vp, bp, bp->b_blkno, from, sectors)); 509 510 /* write buffer to the udf_node, translate vtop on the way*/ 511 udf_write_filebuf(udf_node, bp); 512 } 513 514 return bp->b_error; 515 } 516 517 /* --------------------------------------------------------------------- */ 518 519 int 520 udf_readdir(void *v) 521 { 522 struct vop_readdir_args /* { 523 struct vnode *a_vp; 524 struct uio *a_uio; 525 kauth_cred_t a_cred; 526 int *a_eofflag; 527 off_t **a_cookies; 528 int *a_ncookies; 529 } */ *ap = v; 530 struct uio *uio = ap->a_uio; 531 struct vnode *vp = ap->a_vp; 532 struct udf_node *udf_node = VTOI(vp); 533 struct file_entry *fe; 534 struct extfile_entry *efe; 535 struct fileid_desc *fid; 536 struct dirent *dirent; 537 uint64_t file_size, diroffset, transoffset; 538 uint32_t lb_size; 539 int error; 540 541 DPRINTF(READDIR, ("udf_readdir called\n")); 542 543 /* This operation only makes sense on directory nodes. */ 544 if (vp->v_type != VDIR) 545 return ENOTDIR; 546 547 /* get directory filesize */ 548 if (udf_node->fe) { 549 fe = udf_node->fe; 550 file_size = udf_rw64(fe->inf_len); 551 } else { 552 assert(udf_node->efe); 553 efe = udf_node->efe; 554 file_size = udf_rw64(efe->inf_len); 555 } 556 557 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 558 559 /* 560 * Add `.' pseudo entry if at offset zero since its not in the fid 561 * stream 562 */ 563 if (uio->uio_offset == 0) { 564 DPRINTF(READDIR, ("\t'.' inserted\n")); 565 strcpy(dirent->d_name, "."); 566 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 567 dirent->d_type = DT_DIR; 568 dirent->d_namlen = strlen(dirent->d_name); 569 dirent->d_reclen = _DIRENT_SIZE(dirent); 570 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 571 572 /* mark with magic value that we have done the dummy */ 573 uio->uio_offset = UDF_DIRCOOKIE_DOT; 574 } 575 576 /* we are called just as long as we keep on pushing data in */ 577 error = 0; 578 if (uio->uio_offset < file_size) { 579 /* allocate temporary space for fid */ 580 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 581 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 582 583 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 584 uio->uio_offset = 0; 585 586 diroffset = uio->uio_offset; 587 transoffset = diroffset; 588 while (diroffset < file_size) { 589 DPRINTF(READDIR, ("\tread in fid stream\n")); 590 /* transfer a new fid/dirent */ 591 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 592 DPRINTFIF(READDIR, error, ("read error in read fid " 593 "stream : %d\n", error)); 594 if (error) 595 break; 596 597 /* 598 * If there isn't enough space in the uio to return a 599 * whole dirent, break off read 600 */ 601 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 602 break; 603 604 /* remember the last entry we transfered */ 605 transoffset = diroffset; 606 607 /* skip deleted entries */ 608 if (fid->file_char & UDF_FILE_CHAR_DEL) 609 continue; 610 611 /* skip not visible files */ 612 if (fid->file_char & UDF_FILE_CHAR_VIS) 613 continue; 614 615 /* copy dirent to the caller */ 616 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 617 dirent->d_name, dirent->d_type)); 618 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 619 } 620 621 /* pass on last transfered offset */ 622 uio->uio_offset = transoffset; 623 free(fid, M_UDFTEMP); 624 } 625 626 if (ap->a_eofflag) 627 *ap->a_eofflag = (uio->uio_offset >= file_size); 628 629 #ifdef DEBUG 630 if (udf_verbose & UDF_DEBUG_READDIR) { 631 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 632 if (ap->a_eofflag) 633 printf("returning EOF ? %d\n", *ap->a_eofflag); 634 if (error) 635 printf("readdir returning error %d\n", error); 636 } 637 #endif 638 639 free(dirent, M_UDFTEMP); 640 return error; 641 } 642 643 /* --------------------------------------------------------------------- */ 644 645 int 646 udf_lookup(void *v) 647 { 648 struct vop_lookup_args /* { 649 struct vnode *a_dvp; 650 struct vnode **a_vpp; 651 struct componentname *a_cnp; 652 } */ *ap = v; 653 struct vnode *dvp = ap->a_dvp; 654 struct vnode **vpp = ap->a_vpp; 655 struct componentname *cnp = ap->a_cnp; 656 struct udf_node *dir_node, *res_node; 657 struct udf_mount *ump; 658 struct long_ad icb_loc; 659 mode_t mode; 660 uid_t d_uid; 661 gid_t d_gid; 662 const char *name; 663 int namelen, nameiop, islastcn, mounted_ro; 664 int error, found; 665 666 dir_node = VTOI(dvp); 667 ump = dir_node->ump; 668 *vpp = NULL; 669 670 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 671 cnp->cn_nameptr)); 672 673 /* simplify/clarification flags */ 674 nameiop = cnp->cn_nameiop; 675 islastcn = cnp->cn_flags & ISLASTCN; 676 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 677 678 /* check exec/dirread permissions first */ 679 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 680 if (error) 681 return error; 682 683 DPRINTF(LOOKUP, ("\taccess ok\n")); 684 685 /* 686 * If requesting a modify on the last path element on a read-only 687 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 688 */ 689 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 690 return EROFS; 691 692 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 693 cnp->cn_nameptr)); 694 /* look in the namecache */ 695 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 696 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 697 return *vpp == NULLVP ? ENOENT : 0; 698 } 699 700 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 701 702 /* 703 * Obviously, the file is not (anymore) in the namecache, we have to 704 * search for it. There are three basic cases: '.', '..' and others. 705 * 706 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 707 */ 708 error = 0; 709 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 710 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 711 /* special case 1 '.' */ 712 if (islastcn && cnp->cn_nameiop == RENAME) { 713 error = EISDIR; 714 goto out; 715 } 716 vref(dvp); 717 *vpp = dvp; 718 /* done */ 719 goto done; 720 } else if (cnp->cn_flags & ISDOTDOT) { 721 /* special case 2 '..' */ 722 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 723 724 if (islastcn && cnp->cn_nameiop == RENAME) { 725 error = EINVAL; 726 goto out; 727 } 728 729 /* get our node */ 730 name = ".."; 731 namelen = 2; 732 error = udf_lookup_name_in_dir(dvp, name, namelen, 733 &icb_loc, &found); 734 if (error) 735 goto out; 736 if (!found) 737 error = ENOENT; 738 739 /* first unlock parent */ 740 VOP_UNLOCK(dvp); 741 742 if (error == 0) { 743 DPRINTF(LOOKUP, ("\tfound '..'\n")); 744 /* try to create/reuse the node */ 745 error = udf_get_node(ump, &icb_loc, &res_node); 746 747 if (!error) { 748 DPRINTF(LOOKUP, 749 ("\tnode retrieved/created OK\n")); 750 *vpp = res_node->vnode; 751 } 752 } 753 754 /* try to relock parent */ 755 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 756 goto out; 757 } 758 759 /* all other files */ 760 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 761 762 /* lookup filename in the directory; location icb_loc */ 763 name = cnp->cn_nameptr; 764 namelen = cnp->cn_namelen; 765 error = udf_lookup_name_in_dir(dvp, name, namelen, 766 &icb_loc, &found); 767 if (error) 768 goto out; 769 if (!found) { 770 DPRINTF(LOOKUP, ("\tNOT found\n")); 771 /* 772 * The entry was not found in the directory. This is 773 * valid if we are creating or renaming an entry and 774 * are working on the last component of the path name. 775 */ 776 if (islastcn && (cnp->cn_nameiop == CREATE || 777 cnp->cn_nameiop == RENAME)) { 778 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 779 if (error) { 780 goto out; 781 } 782 error = EJUSTRETURN; 783 } else { 784 error = ENOENT; 785 } 786 /* done */ 787 goto done; 788 } 789 790 /* 791 * XXX NOTE tmpfs has a test here that tests that intermediate 792 * components i.e. not the last one ought to be either a directory or 793 * a link. It seems to function well without this code. 794 */ 795 796 /* try to create/reuse the node */ 797 error = udf_get_node(ump, &icb_loc, &res_node); 798 if (error) 799 goto out; 800 801 /* check permissions */ 802 if (islastcn && (cnp->cn_nameiop == DELETE || 803 cnp->cn_nameiop == RENAME) ) { 804 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 805 if (error) { 806 vput(res_node->vnode); 807 goto out; 808 } 809 810 /* 811 * Check if the directory has its sticky bit set. If so, ask 812 * for clearance since only the owner of a file or directory 813 * can remove/rename from taht directory. 814 */ 815 mode = udf_getaccessmode(dir_node); 816 if ((mode & S_ISTXT) != 0) { 817 udf_getownership(dir_node, &d_uid, &d_gid); 818 error = kauth_authorize_vnode(cnp->cn_cred, 819 KAUTH_VNODE_DELETE, res_node->vnode, 820 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 821 d_uid, d_uid)); 822 if (error) { 823 error = EPERM; 824 vput(res_node->vnode); 825 goto out; 826 } 827 } 828 } 829 830 *vpp = res_node->vnode; 831 832 done: 833 /* 834 * Store result in the cache if requested. If we are creating a file, 835 * the file might not be found and thus putting it into the namecache 836 * might be seen as negative caching. 837 */ 838 if (nameiop != CREATE) 839 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 840 cnp->cn_flags); 841 842 out: 843 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 844 845 return error; 846 } 847 848 /* --------------------------------------------------------------------- */ 849 850 int 851 udf_getattr(void *v) 852 { 853 struct vop_getattr_args /* { 854 struct vnode *a_vp; 855 struct vattr *a_vap; 856 kauth_cred_t a_cred; 857 struct lwp *a_l; 858 } */ *ap = v; 859 struct vnode *vp = ap->a_vp; 860 struct udf_node *udf_node = VTOI(vp); 861 struct udf_mount *ump = udf_node->ump; 862 struct file_entry *fe = udf_node->fe; 863 struct extfile_entry *efe = udf_node->efe; 864 struct filetimes_extattr_entry *ft_extattr; 865 struct device_extattr_entry *devattr; 866 struct vattr *vap = ap->a_vap; 867 struct timestamp *atime, *mtime, *attrtime, *creatime; 868 uint64_t filesize, blkssize; 869 uint32_t nlink; 870 uint32_t offset, a_l; 871 uint8_t *filedata; 872 uid_t uid; 873 gid_t gid; 874 int error; 875 876 DPRINTF(CALL, ("udf_getattr called\n")); 877 878 /* update times before we returning values */ 879 udf_itimes(udf_node, NULL, NULL, NULL); 880 881 /* get descriptor information */ 882 if (fe) { 883 nlink = udf_rw16(fe->link_cnt); 884 uid = (uid_t)udf_rw32(fe->uid); 885 gid = (gid_t)udf_rw32(fe->gid); 886 filesize = udf_rw64(fe->inf_len); 887 blkssize = udf_rw64(fe->logblks_rec); 888 atime = &fe->atime; 889 mtime = &fe->mtime; 890 attrtime = &fe->attrtime; 891 filedata = fe->data; 892 893 /* initial guess */ 894 creatime = mtime; 895 896 /* check our extended attribute if present */ 897 error = udf_extattr_search_intern(udf_node, 898 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 899 if (!error) { 900 ft_extattr = (struct filetimes_extattr_entry *) 901 (filedata + offset); 902 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 903 creatime = &ft_extattr->times[0]; 904 } 905 } else { 906 assert(udf_node->efe); 907 nlink = udf_rw16(efe->link_cnt); 908 uid = (uid_t)udf_rw32(efe->uid); 909 gid = (gid_t)udf_rw32(efe->gid); 910 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 911 blkssize = udf_rw64(efe->logblks_rec); 912 atime = &efe->atime; 913 mtime = &efe->mtime; 914 attrtime = &efe->attrtime; 915 creatime = &efe->ctime; 916 filedata = efe->data; 917 } 918 919 /* do the uid/gid translation game */ 920 if (uid == (uid_t) -1) 921 uid = ump->mount_args.anon_uid; 922 if (gid == (gid_t) -1) 923 gid = ump->mount_args.anon_gid; 924 925 /* fill in struct vattr with values from the node */ 926 vattr_null(vap); 927 vap->va_type = vp->v_type; 928 vap->va_mode = udf_getaccessmode(udf_node); 929 vap->va_nlink = nlink; 930 vap->va_uid = uid; 931 vap->va_gid = gid; 932 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 933 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 934 vap->va_size = filesize; 935 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 936 937 /* 938 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 939 * 1 to the link count if its a directory we're requested attributes 940 * of. 941 */ 942 if (vap->va_type == VDIR) 943 vap->va_nlink++; 944 945 /* access times */ 946 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 947 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 948 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 949 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 950 951 vap->va_gen = 1; /* no multiple generations yes (!?) */ 952 vap->va_flags = 0; /* no flags */ 953 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 954 vap->va_filerev = 1; /* TODO file revision numbers? */ 955 vap->va_vaflags = 0; 956 /* TODO get vaflags from the extended attributes? */ 957 958 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 959 error = udf_extattr_search_intern(udf_node, 960 UDF_DEVICESPEC_ATTR_NO, "", 961 &offset, &a_l); 962 /* if error, deny access */ 963 if (error || (filedata == NULL)) { 964 vap->va_mode = 0; /* or v_type = VNON? */ 965 } else { 966 devattr = (struct device_extattr_entry *) 967 filedata + offset; 968 vap->va_rdev = makedev( 969 udf_rw32(devattr->major), 970 udf_rw32(devattr->minor) 971 ); 972 /* TODO we could check the implementator */ 973 } 974 } 975 976 return 0; 977 } 978 979 /* --------------------------------------------------------------------- */ 980 981 static int 982 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 983 kauth_cred_t cred) 984 { 985 struct udf_node *udf_node = VTOI(vp); 986 uid_t uid; 987 gid_t gid; 988 int error; 989 990 #ifdef notyet 991 /* TODO get vaflags from the extended attributes? */ 992 /* Immutable or append-only files cannot be modified, either. */ 993 if (udf_node->flags & (IMMUTABLE | APPEND)) 994 return EPERM; 995 #endif 996 997 if (vp->v_mount->mnt_flag & MNT_RDONLY) 998 return EROFS; 999 1000 /* retrieve old values */ 1001 udf_getownership(udf_node, &uid, &gid); 1002 1003 /* only one could be specified */ 1004 if (new_uid == VNOVAL) 1005 new_uid = uid; 1006 if (new_gid == VNOVAL) 1007 new_gid = gid; 1008 1009 /* check if we can fit it in an 32 bits */ 1010 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1011 return EINVAL; 1012 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1013 return EINVAL; 1014 1015 /* check permissions */ 1016 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1017 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1018 if (error) 1019 return (error); 1020 1021 /* change the ownership */ 1022 udf_setownership(udf_node, new_uid, new_gid); 1023 1024 /* mark node changed */ 1025 udf_node->i_flags |= IN_CHANGE; 1026 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1027 udf_node->i_flags |= IN_ACCESS; 1028 1029 return 0; 1030 } 1031 1032 1033 static int 1034 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1035 { 1036 struct udf_node *udf_node = VTOI(vp); 1037 uid_t uid; 1038 gid_t gid; 1039 int error; 1040 1041 #ifdef notyet 1042 /* TODO get vaflags from the extended attributes? */ 1043 /* Immutable or append-only files cannot be modified, either. */ 1044 if (udf_node->flags & (IMMUTABLE | APPEND)) 1045 return EPERM; 1046 #endif 1047 1048 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1049 return EROFS; 1050 1051 /* retrieve uid/gid values */ 1052 udf_getownership(udf_node, &uid, &gid); 1053 1054 /* check permissions */ 1055 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1056 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1057 if (error) 1058 return (error); 1059 1060 /* change mode */ 1061 udf_setaccessmode(udf_node, mode); 1062 1063 /* mark node changed */ 1064 udf_node->i_flags |= IN_CHANGE; 1065 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1066 udf_node->i_flags |= IN_ACCESS; 1067 1068 return 0; 1069 } 1070 1071 1072 /* exported */ 1073 int 1074 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1075 { 1076 struct udf_node *udf_node = VTOI(vp); 1077 int error, extended; 1078 1079 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1080 return EROFS; 1081 1082 /* Decide whether this is a valid operation based on the file type. */ 1083 switch (vp->v_type) { 1084 case VDIR: 1085 return EISDIR; 1086 case VREG: 1087 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1088 return EROFS; 1089 break; 1090 case VBLK: 1091 /* FALLTHROUGH */ 1092 case VCHR: 1093 /* FALLTHROUGH */ 1094 case VFIFO: 1095 /* Allow modifications of special files even if in the file 1096 * system is mounted read-only (we are not modifying the 1097 * files themselves, but the objects they represent). */ 1098 return 0; 1099 default: 1100 /* Anything else is unsupported. */ 1101 return EOPNOTSUPP; 1102 } 1103 1104 #if notyet 1105 /* TODO get vaflags from the extended attributes? */ 1106 /* Immutable or append-only files cannot be modified, either. */ 1107 if (node->flags & (IMMUTABLE | APPEND)) 1108 return EPERM; 1109 #endif 1110 1111 /* resize file to the requested size */ 1112 error = udf_resize_node(udf_node, newsize, &extended); 1113 1114 if (error == 0) { 1115 /* mark change */ 1116 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1117 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1118 udf_node->i_flags |= IN_ACCESS; 1119 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1120 udf_update(vp, NULL, NULL, NULL, 0); 1121 } 1122 1123 return error; 1124 } 1125 1126 1127 static int 1128 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1129 { 1130 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1131 return EROFS; 1132 1133 /* 1134 * XXX we can't do this yet, as its not described in the standard yet 1135 */ 1136 1137 return EOPNOTSUPP; 1138 } 1139 1140 1141 static int 1142 udf_chtimes(struct vnode *vp, 1143 struct timespec *atime, struct timespec *mtime, 1144 struct timespec *birthtime, int setattrflags, 1145 kauth_cred_t cred) 1146 { 1147 struct udf_node *udf_node = VTOI(vp); 1148 uid_t uid; 1149 gid_t gid; 1150 int error; 1151 1152 #ifdef notyet 1153 /* TODO get vaflags from the extended attributes? */ 1154 /* Immutable or append-only files cannot be modified, either. */ 1155 if (udf_node->flags & (IMMUTABLE | APPEND)) 1156 return EPERM; 1157 #endif 1158 1159 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1160 return EROFS; 1161 1162 /* retrieve uid/gid values */ 1163 udf_getownership(udf_node, &uid, &gid); 1164 1165 /* check permissions */ 1166 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1167 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1168 if (error) 1169 return (error); 1170 1171 /* update node flags depending on what times are passed */ 1172 if (atime->tv_sec != VNOVAL) 1173 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1174 udf_node->i_flags |= IN_ACCESS; 1175 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1176 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1177 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1178 udf_node->i_flags |= IN_ACCESS; 1179 } 1180 1181 return udf_update(vp, atime, mtime, birthtime, 0); 1182 } 1183 1184 1185 int 1186 udf_setattr(void *v) 1187 { 1188 struct vop_setattr_args /* { 1189 struct vnode *a_vp; 1190 struct vattr *a_vap; 1191 kauth_cred_t a_cred; 1192 struct lwp *a_l; 1193 } */ *ap = v; 1194 struct vnode *vp = ap->a_vp; 1195 /* struct udf_node *udf_node = VTOI(vp); */ 1196 /* struct udf_mount *ump = udf_node->ump; */ 1197 kauth_cred_t cred = ap->a_cred; 1198 struct vattr *vap = ap->a_vap; 1199 int error; 1200 1201 DPRINTF(CALL, ("udf_setattr called\n")); 1202 1203 /* Abort if any unsettable attribute is given. */ 1204 error = 0; 1205 if (vap->va_type != VNON || 1206 vap->va_nlink != VNOVAL || 1207 vap->va_fsid != VNOVAL || 1208 vap->va_fileid != VNOVAL || 1209 vap->va_blocksize != VNOVAL || 1210 #ifdef notyet 1211 /* checks are debated */ 1212 vap->va_ctime.tv_sec != VNOVAL || 1213 vap->va_ctime.tv_nsec != VNOVAL || 1214 vap->va_birthtime.tv_sec != VNOVAL || 1215 vap->va_birthtime.tv_nsec != VNOVAL || 1216 #endif 1217 vap->va_gen != VNOVAL || 1218 vap->va_rdev != VNOVAL || 1219 vap->va_bytes != VNOVAL) 1220 error = EINVAL; 1221 1222 DPRINTF(ATTR, ("setattr changing:\n")); 1223 if (error == 0 && (vap->va_flags != VNOVAL)) { 1224 DPRINTF(ATTR, ("\tchflags\n")); 1225 error = udf_chflags(vp, vap->va_flags, cred); 1226 } 1227 1228 if (error == 0 && (vap->va_size != VNOVAL)) { 1229 DPRINTF(ATTR, ("\tchsize\n")); 1230 error = udf_chsize(vp, vap->va_size, cred); 1231 } 1232 1233 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1234 DPRINTF(ATTR, ("\tchown\n")); 1235 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1236 } 1237 1238 if (error == 0 && (vap->va_mode != VNOVAL)) { 1239 DPRINTF(ATTR, ("\tchmod\n")); 1240 error = udf_chmod(vp, vap->va_mode, cred); 1241 } 1242 1243 if (error == 0 && 1244 ((vap->va_atime.tv_sec != VNOVAL && 1245 vap->va_atime.tv_nsec != VNOVAL) || 1246 (vap->va_mtime.tv_sec != VNOVAL && 1247 vap->va_mtime.tv_nsec != VNOVAL)) 1248 ) { 1249 DPRINTF(ATTR, ("\tchtimes\n")); 1250 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1251 &vap->va_birthtime, vap->va_vaflags, cred); 1252 } 1253 VN_KNOTE(vp, NOTE_ATTRIB); 1254 1255 return error; 1256 } 1257 1258 /* --------------------------------------------------------------------- */ 1259 1260 /* 1261 * Return POSIX pathconf information for UDF file systems. 1262 */ 1263 int 1264 udf_pathconf(void *v) 1265 { 1266 struct vop_pathconf_args /* { 1267 struct vnode *a_vp; 1268 int a_name; 1269 register_t *a_retval; 1270 } */ *ap = v; 1271 uint32_t bits; 1272 1273 DPRINTF(CALL, ("udf_pathconf called\n")); 1274 1275 switch (ap->a_name) { 1276 case _PC_LINK_MAX: 1277 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1278 return 0; 1279 case _PC_NAME_MAX: 1280 *ap->a_retval = UDF_MAXNAMLEN; 1281 return 0; 1282 case _PC_PATH_MAX: 1283 *ap->a_retval = PATH_MAX; 1284 return 0; 1285 case _PC_PIPE_BUF: 1286 *ap->a_retval = PIPE_BUF; 1287 return 0; 1288 case _PC_CHOWN_RESTRICTED: 1289 *ap->a_retval = 1; 1290 return 0; 1291 case _PC_NO_TRUNC: 1292 *ap->a_retval = 1; 1293 return 0; 1294 case _PC_SYNC_IO: 1295 *ap->a_retval = 0; /* synchronised is off for performance */ 1296 return 0; 1297 case _PC_FILESIZEBITS: 1298 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1299 bits = 64; /* XXX ought to deliver 65 */ 1300 #if 0 1301 if (udf_node) 1302 bits = 64 * vp->v_mount->mnt_dev_bshift; 1303 #endif 1304 *ap->a_retval = bits; 1305 return 0; 1306 } 1307 1308 return EINVAL; 1309 } 1310 1311 1312 /* --------------------------------------------------------------------- */ 1313 1314 int 1315 udf_open(void *v) 1316 { 1317 struct vop_open_args /* { 1318 struct vnode *a_vp; 1319 int a_mode; 1320 kauth_cred_t a_cred; 1321 struct proc *a_p; 1322 } */ *ap = v; 1323 int flags; 1324 1325 DPRINTF(CALL, ("udf_open called\n")); 1326 1327 /* 1328 * Files marked append-only must be opened for appending. 1329 * TODO: get chflags(2) flags from extened attribute. 1330 */ 1331 flags = 0; 1332 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1333 return (EPERM); 1334 1335 return 0; 1336 } 1337 1338 1339 /* --------------------------------------------------------------------- */ 1340 1341 int 1342 udf_close(void *v) 1343 { 1344 struct vop_close_args /* { 1345 struct vnode *a_vp; 1346 int a_fflag; 1347 kauth_cred_t a_cred; 1348 struct proc *a_p; 1349 } */ *ap = v; 1350 struct vnode *vp = ap->a_vp; 1351 struct udf_node *udf_node = VTOI(vp); 1352 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1353 int error; 1354 1355 DPRINTF(CALL, ("udf_close called\n")); 1356 udf_node = udf_node; /* shut up gcc */ 1357 1358 if (!async && (vp->v_type != VDIR)) { 1359 mutex_enter(vp->v_interlock); 1360 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1361 if (error) 1362 return error; 1363 } 1364 1365 mutex_enter(vp->v_interlock); 1366 if (vp->v_usecount > 1) 1367 udf_itimes(udf_node, NULL, NULL, NULL); 1368 mutex_exit(vp->v_interlock); 1369 1370 return 0; 1371 } 1372 1373 1374 /* --------------------------------------------------------------------- */ 1375 1376 static int 1377 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1378 { 1379 int flags; 1380 1381 /* check if we are allowed to write */ 1382 switch (vap->va_type) { 1383 case VDIR: 1384 case VLNK: 1385 case VREG: 1386 /* 1387 * normal nodes: check if we're on a read-only mounted 1388 * filingsystem and bomb out if we're trying to write. 1389 */ 1390 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1391 return EROFS; 1392 break; 1393 case VBLK: 1394 case VCHR: 1395 case VSOCK: 1396 case VFIFO: 1397 /* 1398 * special nodes: even on read-only mounted filingsystems 1399 * these are allowed to be written to if permissions allow. 1400 */ 1401 break; 1402 default: 1403 /* no idea what this is */ 1404 return EINVAL; 1405 } 1406 1407 /* noone may write immutable files */ 1408 /* TODO: get chflags(2) flags from extened attribute. */ 1409 flags = 0; 1410 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1411 return EPERM; 1412 1413 return 0; 1414 } 1415 1416 static int 1417 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1418 kauth_cred_t cred) 1419 { 1420 /* ask the generic genfs_can_access to advice on security */ 1421 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1422 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1423 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1424 } 1425 1426 int 1427 udf_access(void *v) 1428 { 1429 struct vop_access_args /* { 1430 struct vnode *a_vp; 1431 int a_mode; 1432 kauth_cred_t a_cred; 1433 struct proc *a_p; 1434 } */ *ap = v; 1435 struct vnode *vp = ap->a_vp; 1436 mode_t mode = ap->a_mode; 1437 kauth_cred_t cred = ap->a_cred; 1438 /* struct udf_node *udf_node = VTOI(vp); */ 1439 struct vattr vap; 1440 int error; 1441 1442 DPRINTF(CALL, ("udf_access called\n")); 1443 1444 error = VOP_GETATTR(vp, &vap, NULL); 1445 if (error) 1446 return error; 1447 1448 error = udf_check_possible(vp, &vap, mode); 1449 if (error) 1450 return error; 1451 1452 error = udf_check_permitted(vp, &vap, mode, cred); 1453 1454 return error; 1455 } 1456 1457 /* --------------------------------------------------------------------- */ 1458 1459 int 1460 udf_create(void *v) 1461 { 1462 struct vop_create_args /* { 1463 struct vnode *a_dvp; 1464 struct vnode **a_vpp; 1465 struct componentname *a_cnp; 1466 struct vattr *a_vap; 1467 } */ *ap = v; 1468 struct vnode *dvp = ap->a_dvp; 1469 struct vnode **vpp = ap->a_vpp; 1470 struct vattr *vap = ap->a_vap; 1471 struct componentname *cnp = ap->a_cnp; 1472 int error; 1473 1474 DPRINTF(CALL, ("udf_create called\n")); 1475 error = udf_create_node(dvp, vpp, vap, cnp); 1476 1477 vput(dvp); 1478 return error; 1479 } 1480 1481 /* --------------------------------------------------------------------- */ 1482 1483 int 1484 udf_mknod(void *v) 1485 { 1486 struct vop_mknod_args /* { 1487 struct vnode *a_dvp; 1488 struct vnode **a_vpp; 1489 struct componentname *a_cnp; 1490 struct vattr *a_vap; 1491 } */ *ap = v; 1492 struct vnode *dvp = ap->a_dvp; 1493 struct vnode **vpp = ap->a_vpp; 1494 struct vattr *vap = ap->a_vap; 1495 struct componentname *cnp = ap->a_cnp; 1496 int error; 1497 1498 DPRINTF(CALL, ("udf_mknod called\n")); 1499 error = udf_create_node(dvp, vpp, vap, cnp); 1500 1501 vput(dvp); 1502 return error; 1503 } 1504 1505 /* --------------------------------------------------------------------- */ 1506 1507 int 1508 udf_mkdir(void *v) 1509 { 1510 struct vop_mkdir_args /* { 1511 struct vnode *a_dvp; 1512 struct vnode **a_vpp; 1513 struct componentname *a_cnp; 1514 struct vattr *a_vap; 1515 } */ *ap = v; 1516 struct vnode *dvp = ap->a_dvp; 1517 struct vnode **vpp = ap->a_vpp; 1518 struct vattr *vap = ap->a_vap; 1519 struct componentname *cnp = ap->a_cnp; 1520 int error; 1521 1522 DPRINTF(CALL, ("udf_mkdir called\n")); 1523 error = udf_create_node(dvp, vpp, vap, cnp); 1524 1525 vput(dvp); 1526 return error; 1527 } 1528 1529 /* --------------------------------------------------------------------- */ 1530 1531 static int 1532 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1533 { 1534 struct udf_node *udf_node, *dir_node; 1535 struct vattr vap; 1536 int error; 1537 1538 DPRINTF(CALL, ("udf_link called\n")); 1539 KASSERT(dvp != vp); 1540 KASSERT(vp->v_type != VDIR); 1541 KASSERT(dvp->v_mount == vp->v_mount); 1542 1543 /* get attributes */ 1544 dir_node = VTOI(dvp); 1545 udf_node = VTOI(vp); 1546 1547 error = VOP_GETATTR(vp, &vap, FSCRED); 1548 if (error) { 1549 VOP_UNLOCK(vp); 1550 return error; 1551 } 1552 1553 /* check link count overflow */ 1554 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1555 VOP_UNLOCK(vp); 1556 return EMLINK; 1557 } 1558 1559 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1560 if (error) 1561 VOP_UNLOCK(vp); 1562 return error; 1563 } 1564 1565 int 1566 udf_link(void *v) 1567 { 1568 struct vop_link_args /* { 1569 struct vnode *a_dvp; 1570 struct vnode *a_vp; 1571 struct componentname *a_cnp; 1572 } */ *ap = v; 1573 struct vnode *dvp = ap->a_dvp; 1574 struct vnode *vp = ap->a_vp; 1575 struct componentname *cnp = ap->a_cnp; 1576 int error; 1577 1578 error = udf_do_link(dvp, vp, cnp); 1579 if (error) 1580 VOP_ABORTOP(dvp, cnp); 1581 1582 VN_KNOTE(vp, NOTE_LINK); 1583 VN_KNOTE(dvp, NOTE_WRITE); 1584 vput(dvp); 1585 1586 return error; 1587 } 1588 1589 /* --------------------------------------------------------------------- */ 1590 1591 static int 1592 udf_do_symlink(struct udf_node *udf_node, char *target) 1593 { 1594 struct pathcomp pathcomp; 1595 uint8_t *pathbuf, *pathpos, *compnamepos; 1596 char *mntonname; 1597 int pathlen, len, compnamelen, mntonnamelen; 1598 int error; 1599 1600 /* process `target' to an UDF structure */ 1601 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1602 pathpos = pathbuf; 1603 pathlen = 0; 1604 1605 if (*target == '/') { 1606 /* symlink starts from the root */ 1607 len = UDF_PATH_COMP_SIZE; 1608 memset(&pathcomp, 0, len); 1609 pathcomp.type = UDF_PATH_COMP_ROOT; 1610 1611 /* check if its mount-point relative! */ 1612 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1613 mntonnamelen = strlen(mntonname); 1614 if (strlen(target) >= mntonnamelen) { 1615 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1616 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1617 target += mntonnamelen; 1618 } 1619 } else { 1620 target++; 1621 } 1622 1623 memcpy(pathpos, &pathcomp, len); 1624 pathpos += len; 1625 pathlen += len; 1626 } 1627 1628 error = 0; 1629 while (*target) { 1630 /* ignore multiple '/' */ 1631 while (*target == '/') { 1632 target++; 1633 } 1634 if (!*target) 1635 break; 1636 1637 /* extract component name */ 1638 compnamelen = 0; 1639 compnamepos = target; 1640 while ((*target) && (*target != '/')) { 1641 target++; 1642 compnamelen++; 1643 } 1644 1645 /* just trunc if too long ?? (security issue) */ 1646 if (compnamelen >= 127) { 1647 error = ENAMETOOLONG; 1648 break; 1649 } 1650 1651 /* convert unix name to UDF name */ 1652 len = sizeof(struct pathcomp); 1653 memset(&pathcomp, 0, len); 1654 pathcomp.type = UDF_PATH_COMP_NAME; 1655 len = UDF_PATH_COMP_SIZE; 1656 1657 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1658 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1659 if ((compnamelen == 1) && (*compnamepos == '.')) 1660 pathcomp.type = UDF_PATH_COMP_CURDIR; 1661 1662 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1663 unix_to_udf_name( 1664 (char *) &pathcomp.ident, &pathcomp.l_ci, 1665 compnamepos, compnamelen, 1666 &udf_node->ump->logical_vol->desc_charset); 1667 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1668 } 1669 1670 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1671 error = ENAMETOOLONG; 1672 break; 1673 } 1674 1675 memcpy(pathpos, &pathcomp, len); 1676 pathpos += len; 1677 pathlen += len; 1678 } 1679 1680 if (error) { 1681 /* aparently too big */ 1682 free(pathbuf, M_UDFTEMP); 1683 return error; 1684 } 1685 1686 error = udf_grow_node(udf_node, pathlen); 1687 if (error) { 1688 /* failed to pregrow node */ 1689 free(pathbuf, M_UDFTEMP); 1690 return error; 1691 } 1692 1693 /* write out structure on the new file */ 1694 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1695 pathbuf, pathlen, 0, 1696 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1697 FSCRED, NULL, NULL); 1698 1699 /* return status of symlink contents writeout */ 1700 free(pathbuf, M_UDFTEMP); 1701 return error; 1702 } 1703 1704 1705 int 1706 udf_symlink(void *v) 1707 { 1708 struct vop_symlink_args /* { 1709 struct vnode *a_dvp; 1710 struct vnode **a_vpp; 1711 struct componentname *a_cnp; 1712 struct vattr *a_vap; 1713 char *a_target; 1714 } */ *ap = v; 1715 struct vnode *dvp = ap->a_dvp; 1716 struct vnode **vpp = ap->a_vpp; 1717 struct vattr *vap = ap->a_vap; 1718 struct componentname *cnp = ap->a_cnp; 1719 struct udf_node *dir_node; 1720 struct udf_node *udf_node; 1721 int error; 1722 1723 DPRINTF(CALL, ("udf_symlink called\n")); 1724 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1725 error = udf_create_node(dvp, vpp, vap, cnp); 1726 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1727 if (!error) { 1728 dir_node = VTOI(dvp); 1729 udf_node = VTOI(*vpp); 1730 KASSERT(udf_node); 1731 error = udf_do_symlink(udf_node, ap->a_target); 1732 if (error) { 1733 /* remove node */ 1734 udf_shrink_node(udf_node, 0); 1735 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1736 } 1737 } 1738 vput(dvp); 1739 return error; 1740 } 1741 1742 /* --------------------------------------------------------------------- */ 1743 1744 int 1745 udf_readlink(void *v) 1746 { 1747 struct vop_readlink_args /* { 1748 struct vnode *a_vp; 1749 struct uio *a_uio; 1750 kauth_cred_t a_cred; 1751 } */ *ap = v; 1752 struct vnode *vp = ap->a_vp; 1753 struct uio *uio = ap->a_uio; 1754 kauth_cred_t cred = ap->a_cred; 1755 struct udf_node *udf_node; 1756 struct pathcomp pathcomp; 1757 struct vattr vattr; 1758 uint8_t *pathbuf, *targetbuf, *tmpname; 1759 uint8_t *pathpos, *targetpos; 1760 char *mntonname; 1761 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1762 int first, error; 1763 1764 DPRINTF(CALL, ("udf_readlink called\n")); 1765 1766 udf_node = VTOI(vp); 1767 error = VOP_GETATTR(vp, &vattr, cred); 1768 if (error) 1769 return error; 1770 1771 /* claim temporary buffers for translation */ 1772 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1773 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1774 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1775 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1776 memset(targetbuf, 0, PATH_MAX); 1777 1778 /* read contents of file in our temporary buffer */ 1779 error = vn_rdwr(UIO_READ, udf_node->vnode, 1780 pathbuf, vattr.va_size, 0, 1781 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1782 FSCRED, NULL, NULL); 1783 if (error) { 1784 /* failed to read in symlink contents */ 1785 free(pathbuf, M_UDFTEMP); 1786 free(targetbuf, M_UDFTEMP); 1787 free(tmpname, M_UDFTEMP); 1788 return error; 1789 } 1790 1791 /* convert to a unix path */ 1792 pathpos = pathbuf; 1793 pathlen = 0; 1794 targetpos = targetbuf; 1795 targetlen = PATH_MAX; 1796 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1797 mntonnamelen = strlen(mntonname); 1798 1799 error = 0; 1800 first = 1; 1801 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1802 len = UDF_PATH_COMP_SIZE; 1803 memcpy(&pathcomp, pathpos, len); 1804 l_ci = pathcomp.l_ci; 1805 switch (pathcomp.type) { 1806 case UDF_PATH_COMP_ROOT : 1807 /* XXX should check for l_ci; bugcompatible now */ 1808 if ((targetlen < 1) || !first) { 1809 error = EINVAL; 1810 break; 1811 } 1812 *targetpos++ = '/'; targetlen--; 1813 break; 1814 case UDF_PATH_COMP_MOUNTROOT : 1815 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1816 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1817 error = EINVAL; 1818 break; 1819 } 1820 memcpy(targetpos, mntonname, mntonnamelen); 1821 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1822 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1823 /* more follows, so must be directory */ 1824 *targetpos++ = '/'; targetlen--; 1825 } 1826 break; 1827 case UDF_PATH_COMP_PARENTDIR : 1828 /* XXX should check for l_ci; bugcompatible now */ 1829 if (targetlen < 3) { 1830 error = EINVAL; 1831 break; 1832 } 1833 *targetpos++ = '.'; targetlen--; 1834 *targetpos++ = '.'; targetlen--; 1835 *targetpos++ = '/'; targetlen--; 1836 break; 1837 case UDF_PATH_COMP_CURDIR : 1838 /* XXX should check for l_ci; bugcompatible now */ 1839 if (targetlen < 2) { 1840 error = EINVAL; 1841 break; 1842 } 1843 *targetpos++ = '.'; targetlen--; 1844 *targetpos++ = '/'; targetlen--; 1845 break; 1846 case UDF_PATH_COMP_NAME : 1847 if (l_ci == 0) { 1848 error = EINVAL; 1849 break; 1850 } 1851 memset(tmpname, 0, PATH_MAX); 1852 memcpy(&pathcomp, pathpos, len + l_ci); 1853 udf_to_unix_name(tmpname, MAXPATHLEN, 1854 pathcomp.ident, l_ci, 1855 &udf_node->ump->logical_vol->desc_charset); 1856 namelen = strlen(tmpname); 1857 if (targetlen < namelen + 1) { 1858 error = EINVAL; 1859 break; 1860 } 1861 memcpy(targetpos, tmpname, namelen); 1862 targetpos += namelen; targetlen -= namelen; 1863 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1864 /* more follows, so must be directory */ 1865 *targetpos++ = '/'; targetlen--; 1866 } 1867 break; 1868 default : 1869 error = EINVAL; 1870 break; 1871 } 1872 first = 0; 1873 if (error) 1874 break; 1875 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1876 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1877 1878 } 1879 /* all processed? */ 1880 if (vattr.va_size - pathlen > 0) 1881 error = EINVAL; 1882 1883 /* uiomove() to destination */ 1884 if (!error) 1885 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1886 1887 free(pathbuf, M_UDFTEMP); 1888 free(targetbuf, M_UDFTEMP); 1889 free(tmpname, M_UDFTEMP); 1890 1891 return error; 1892 } 1893 1894 /* --------------------------------------------------------------------- */ 1895 1896 /* 1897 * udf_rename() moved to udf_rename.c 1898 */ 1899 1900 /* --------------------------------------------------------------------- */ 1901 1902 int 1903 udf_remove(void *v) 1904 { 1905 struct vop_remove_args /* { 1906 struct vnode *a_dvp; 1907 struct vnode *a_vp; 1908 struct componentname *a_cnp; 1909 } */ *ap = v; 1910 struct vnode *dvp = ap->a_dvp; 1911 struct vnode *vp = ap->a_vp; 1912 struct componentname *cnp = ap->a_cnp; 1913 struct udf_node *dir_node = VTOI(dvp); 1914 struct udf_node *udf_node = VTOI(vp); 1915 struct udf_mount *ump = dir_node->ump; 1916 int error; 1917 1918 DPRINTF(CALL, ("udf_remove called\n")); 1919 if (vp->v_type != VDIR) { 1920 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1921 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1922 } else { 1923 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1924 error = EPERM; 1925 } 1926 1927 if (error == 0) { 1928 VN_KNOTE(vp, NOTE_DELETE); 1929 VN_KNOTE(dvp, NOTE_WRITE); 1930 } 1931 1932 if (dvp == vp) 1933 vrele(vp); 1934 else 1935 vput(vp); 1936 vput(dvp); 1937 1938 return error; 1939 } 1940 1941 /* --------------------------------------------------------------------- */ 1942 1943 int 1944 udf_rmdir(void *v) 1945 { 1946 struct vop_rmdir_args /* { 1947 struct vnode *a_dvp; 1948 struct vnode *a_vp; 1949 struct componentname *a_cnp; 1950 } */ *ap = v; 1951 struct vnode *vp = ap->a_vp; 1952 struct vnode *dvp = ap->a_dvp; 1953 struct componentname *cnp = ap->a_cnp; 1954 struct udf_node *dir_node = VTOI(dvp); 1955 struct udf_node *udf_node = VTOI(vp); 1956 struct udf_mount *ump = dir_node->ump; 1957 int error, isempty; 1958 1959 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1960 1961 /* don't allow '.' to be deleted */ 1962 if (dir_node == udf_node) { 1963 vrele(dvp); 1964 vput(vp); 1965 return EINVAL; 1966 } 1967 1968 /* make sure our `leaf' node's hash is populated */ 1969 dirhash_get(&udf_node->dir_hash); 1970 error = udf_dirhash_fill(udf_node); 1971 if (error) { 1972 dirhash_put(udf_node->dir_hash); 1973 return error; 1974 } 1975 1976 /* check to see if the directory is empty */ 1977 isempty = dirhash_dir_isempty(udf_node->dir_hash); 1978 dirhash_put(udf_node->dir_hash); 1979 1980 if (!isempty) { 1981 vput(dvp); 1982 vput(vp); 1983 return ENOTEMPTY; 1984 } 1985 1986 /* detach the node from the directory, udf_node is an empty dir here */ 1987 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1988 if (error == 0) { 1989 cache_purge(vp); 1990 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1991 /* 1992 * Bug alert: we need to remove '..' from the detaching 1993 * udf_node so further lookups of this are not possible. This 1994 * prevents a process in a deleted directory from going to its 1995 * deleted parent. Since `udf_node' is garanteed to be empty 1996 * here, trunc it so no fids are there. 1997 */ 1998 dirhash_purge(&udf_node->dir_hash); 1999 udf_shrink_node(udf_node, 0); 2000 VN_KNOTE(vp, NOTE_DELETE); 2001 } 2002 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 2003 2004 /* unput the nodes and exit */ 2005 vput(dvp); 2006 vput(vp); 2007 2008 return error; 2009 } 2010 2011 /* --------------------------------------------------------------------- */ 2012 2013 int 2014 udf_fsync(void *v) 2015 { 2016 struct vop_fsync_args /* { 2017 struct vnode *a_vp; 2018 kauth_cred_t a_cred; 2019 int a_flags; 2020 off_t offlo; 2021 off_t offhi; 2022 struct proc *a_p; 2023 } */ *ap = v; 2024 struct vnode *vp = ap->a_vp; 2025 struct udf_node *udf_node = VTOI(vp); 2026 int error, flags, wait; 2027 2028 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2029 udf_node, 2030 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2031 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2032 2033 /* flush data and wait for it when requested */ 2034 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2035 error = vflushbuf(vp, ap->a_flags); 2036 if (error) 2037 return error; 2038 2039 if (udf_node == NULL) { 2040 printf("udf_fsync() called on NULL udf_node!\n"); 2041 return 0; 2042 } 2043 if (vp->v_tag != VT_UDF) { 2044 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2045 return 0; 2046 } 2047 2048 /* set our times */ 2049 udf_itimes(udf_node, NULL, NULL, NULL); 2050 2051 /* if called when mounted readonly, never write back */ 2052 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2053 return 0; 2054 2055 /* if only data is requested, return */ 2056 if (ap->a_flags & FSYNC_DATAONLY) 2057 return 0; 2058 2059 /* check if the node is dirty 'enough'*/ 2060 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2061 if (flags == 0) 2062 return 0; 2063 2064 /* if we don't have to wait, check for IO pending */ 2065 if (!wait) { 2066 if (vp->v_numoutput > 0) { 2067 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2068 return 0; 2069 } 2070 if (udf_node->outstanding_bufs > 0) { 2071 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2072 return 0; 2073 } 2074 if (udf_node->outstanding_nodedscr > 0) { 2075 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2076 return 0; 2077 } 2078 } 2079 2080 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2081 if (wait) { 2082 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2083 mutex_enter(vp->v_interlock); 2084 while (vp->v_numoutput) { 2085 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2086 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2087 } 2088 mutex_exit(vp->v_interlock); 2089 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2090 } 2091 2092 /* write out node and wait for it if requested */ 2093 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2094 error = udf_writeout_node(udf_node, wait); 2095 if (error) 2096 return error; 2097 2098 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2099 2100 return 0; 2101 } 2102 2103 /* --------------------------------------------------------------------- */ 2104 2105 int 2106 udf_advlock(void *v) 2107 { 2108 struct vop_advlock_args /* { 2109 struct vnode *a_vp; 2110 void *a_id; 2111 int a_op; 2112 struct flock *a_fl; 2113 int a_flags; 2114 } */ *ap = v; 2115 struct vnode *vp = ap->a_vp; 2116 struct udf_node *udf_node = VTOI(vp); 2117 struct file_entry *fe; 2118 struct extfile_entry *efe; 2119 uint64_t file_size; 2120 2121 DPRINTF(LOCKING, ("udf_advlock called\n")); 2122 2123 /* get directory filesize */ 2124 if (udf_node->fe) { 2125 fe = udf_node->fe; 2126 file_size = udf_rw64(fe->inf_len); 2127 } else { 2128 assert(udf_node->efe); 2129 efe = udf_node->efe; 2130 file_size = udf_rw64(efe->inf_len); 2131 } 2132 2133 return lf_advlock(ap, &udf_node->lockf, file_size); 2134 } 2135 2136 /* --------------------------------------------------------------------- */ 2137 2138 /* Global vfs vnode data structures for udfs */ 2139 int (**udf_vnodeop_p)(void *); 2140 2141 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2142 { &vop_default_desc, vn_default_error }, 2143 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2144 { &vop_create_desc, udf_create }, /* create */ 2145 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2146 { &vop_open_desc, udf_open }, /* open */ 2147 { &vop_close_desc, udf_close }, /* close */ 2148 { &vop_access_desc, udf_access }, /* access */ 2149 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2150 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2151 { &vop_read_desc, udf_read }, /* read */ 2152 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2153 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2154 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2155 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2156 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2157 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2158 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2159 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2160 { &vop_seek_desc, genfs_seek }, /* seek */ 2161 { &vop_remove_desc, udf_remove }, /* remove */ 2162 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2163 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2164 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2165 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2166 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2167 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2168 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2169 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2170 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2171 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2172 { &vop_lock_desc, genfs_lock }, /* lock */ 2173 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2174 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2175 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2176 /* { &vop_print_desc, udf_print }, */ /* print */ 2177 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2178 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2179 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2180 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2181 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2182 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2183 { NULL, NULL } 2184 }; 2185 2186 2187 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2188 &udf_vnodeop_p, udf_vnodeop_entries 2189 }; 2190