1 /* $NetBSD: udf_vnops.c,v 1.114 2020/06/27 17:29:18 christos 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 1.114 2020/06/27 17:29:18 christos 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 /* forward declarations */ 71 static int udf_do_readlink(struct udf_node *udf_node, uint64_t filesize, 72 uint8_t *targetbuf, int *length); 73 74 /* implementations of vnode functions; table follows at end */ 75 /* --------------------------------------------------------------------- */ 76 77 int 78 udf_inactive(void *v) 79 { 80 struct vop_inactive_v2_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 return 0; 93 } 94 95 /* 96 * Optionally flush metadata to disc. 97 */ 98 if (udf_node->fe) { 99 refcnt = udf_rw16(udf_node->fe->link_cnt); 100 } else { 101 assert(udf_node->efe); 102 refcnt = udf_rw16(udf_node->efe->link_cnt); 103 } 104 105 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 106 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 107 /* system nodes are not writen out on inactive, so flush */ 108 udf_node->i_flags = 0; 109 } 110 111 *ap->a_recycle = false; 112 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 113 *ap->a_recycle = true; 114 return 0; 115 } 116 117 /* write out its node */ 118 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 119 udf_update(vp, NULL, NULL, NULL, 0); 120 121 return 0; 122 } 123 124 /* --------------------------------------------------------------------- */ 125 126 int 127 udf_reclaim(void *v) 128 { 129 struct vop_reclaim_v2_args /* { 130 struct vnode *a_vp; 131 } */ *ap = v; 132 struct vnode *vp = ap->a_vp; 133 struct udf_node *udf_node = VTOI(vp); 134 int refcnt; 135 136 VOP_UNLOCK(vp); 137 138 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 139 140 if (udf_node == NULL) { 141 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 142 return 0; 143 } 144 145 /* 146 * If the file has not been referenced anymore in a directory 147 * we ought to free up the resources on disc if applicable. 148 */ 149 if (udf_node->fe) { 150 refcnt = udf_rw16(udf_node->fe->link_cnt); 151 } else { 152 assert(udf_node->efe); 153 refcnt = udf_rw16(udf_node->efe->link_cnt); 154 } 155 156 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 157 /* remove this file's allocation */ 158 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 159 udf_delete_node(udf_node); 160 } 161 162 /* update note for closure */ 163 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 164 165 /* async check to see if all node descriptors are written out */ 166 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 167 vprint("udf_reclaim(): waiting for writeout\n", vp); 168 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 169 } 170 171 /* dispose all node knowledge */ 172 udf_dispose_node(udf_node); 173 174 return 0; 175 } 176 177 /* --------------------------------------------------------------------- */ 178 179 int 180 udf_read(void *v) 181 { 182 struct vop_read_args /* { 183 struct vnode *a_vp; 184 struct uio *a_uio; 185 int a_ioflag; 186 kauth_cred_t a_cred; 187 } */ *ap = v; 188 struct vnode *vp = ap->a_vp; 189 struct uio *uio = ap->a_uio; 190 int ioflag = ap->a_ioflag; 191 int advice = IO_ADV_DECODE(ap->a_ioflag); 192 struct uvm_object *uobj; 193 struct udf_node *udf_node = VTOI(vp); 194 struct file_entry *fe; 195 struct extfile_entry *efe; 196 uint64_t file_size; 197 vsize_t len; 198 int error; 199 200 /* 201 * XXX reading from extended attributes not yet implemented. FreeBSD 202 * has it in mind to forward the IO_EXT read call to the 203 * VOP_READEXTATTR(). 204 */ 205 206 DPRINTF(READ, ("udf_read called\n")); 207 208 /* can this happen? some filingsystems have this check */ 209 if (uio->uio_offset < 0) 210 return EINVAL; 211 if (uio->uio_resid == 0) 212 return 0; 213 214 /* protect against rogue programs reading raw directories and links */ 215 if ((ioflag & IO_ALTSEMANTICS) == 0) { 216 if (vp->v_type == VDIR) 217 return EISDIR; 218 /* all but regular files just give EINVAL */ 219 if (vp->v_type != VREG) 220 return EINVAL; 221 } 222 223 assert(udf_node); 224 assert(udf_node->fe || udf_node->efe); 225 226 /* get file/directory filesize */ 227 if (udf_node->fe) { 228 fe = udf_node->fe; 229 file_size = udf_rw64(fe->inf_len); 230 } else { 231 assert(udf_node->efe); 232 efe = udf_node->efe; 233 file_size = udf_rw64(efe->inf_len); 234 } 235 236 /* read contents using buffercache */ 237 uobj = &vp->v_uobj; 238 error = 0; 239 while (uio->uio_resid > 0) { 240 /* reached end? */ 241 if (file_size <= uio->uio_offset) 242 break; 243 244 /* maximise length to file extremity */ 245 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 246 if (len == 0) 247 break; 248 249 /* ubc, here we come, prepare to trap */ 250 error = ubc_uiomove(uobj, uio, len, advice, 251 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 252 if (error) 253 break; 254 } 255 256 /* note access time unless not requested */ 257 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 258 udf_node->i_flags |= IN_ACCESS; 259 if ((ioflag & IO_SYNC) == IO_SYNC) { 260 int uerror; 261 262 uerror = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 263 if (error == 0) 264 error = uerror; 265 } 266 } 267 268 return error; 269 } 270 271 /* --------------------------------------------------------------------- */ 272 273 int 274 udf_write(void *v) 275 { 276 struct vop_write_args /* { 277 struct vnode *a_vp; 278 struct uio *a_uio; 279 int a_ioflag; 280 kauth_cred_t a_cred; 281 } */ *ap = v; 282 struct vnode *vp = ap->a_vp; 283 struct uio *uio = ap->a_uio; 284 int ioflag = ap->a_ioflag; 285 kauth_cred_t cred = ap->a_cred; 286 int advice = IO_ADV_DECODE(ap->a_ioflag); 287 struct uvm_object *uobj; 288 struct udf_node *udf_node = VTOI(vp); 289 struct file_entry *fe; 290 struct extfile_entry *efe; 291 uint64_t file_size, old_size, old_offset; 292 vsize_t len; 293 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 294 int error; 295 int resid, extended; 296 297 /* 298 * XXX writing to extended attributes not yet implemented. FreeBSD has 299 * it in mind to forward the IO_EXT read call to the 300 * VOP_READEXTATTR(). 301 */ 302 303 DPRINTF(WRITE, ("udf_write called\n")); 304 305 /* can this happen? some filingsystems have this check */ 306 if (uio->uio_offset < 0) 307 return EINVAL; 308 if (uio->uio_resid == 0) 309 return 0; 310 311 /* protect against rogue programs writing raw directories or links */ 312 if ((ioflag & IO_ALTSEMANTICS) == 0) { 313 if (vp->v_type == VDIR) 314 return EISDIR; 315 /* all but regular files just give EINVAL for now */ 316 if (vp->v_type != VREG) 317 return EINVAL; 318 } 319 320 assert(udf_node); 321 assert(udf_node->fe || udf_node->efe); 322 323 /* get file/directory filesize */ 324 if (udf_node->fe) { 325 fe = udf_node->fe; 326 file_size = udf_rw64(fe->inf_len); 327 } else { 328 assert(udf_node->efe); 329 efe = udf_node->efe; 330 file_size = udf_rw64(efe->inf_len); 331 } 332 old_size = file_size; 333 334 /* if explicitly asked to append, uio_offset can be wrong? */ 335 if (ioflag & IO_APPEND) 336 uio->uio_offset = file_size; 337 338 extended = (uio->uio_offset + uio->uio_resid > file_size); 339 if (extended) { 340 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 341 file_size, uio->uio_offset + uio->uio_resid)); 342 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 343 if (error) 344 return error; 345 file_size = uio->uio_offset + uio->uio_resid; 346 } 347 348 /* write contents using buffercache */ 349 uobj = &vp->v_uobj; 350 resid = uio->uio_resid; 351 error = 0; 352 353 uvm_vnp_setwritesize(vp, file_size); 354 old_offset = uio->uio_offset; 355 while (uio->uio_resid > 0) { 356 /* maximise length to file extremity */ 357 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 358 if (len == 0) 359 break; 360 361 genfs_node_wrlock(vp); 362 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 363 genfs_node_unlock(vp); 364 if (error) 365 break; 366 367 /* ubc, here we come, prepare to trap */ 368 error = ubc_uiomove(uobj, uio, len, advice, 369 UBC_WRITE | UBC_VNODE_FLAGS(vp)); 370 if (error) 371 break; 372 373 /* 374 * flush what we just wrote if necessary. 375 * XXXUBC simplistic async flushing. 376 * 377 * Directories are excluded since its file data that we want 378 * to purge. 379 */ 380 if ((vp->v_type != VDIR) && 381 (old_offset >> 16 != uio->uio_offset >> 16)) { 382 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 383 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 384 (uio->uio_offset >> 16) << 16, 385 PGO_CLEANIT | PGO_LAZY); 386 old_offset = uio->uio_offset; 387 } 388 } 389 uvm_vnp_setsize(vp, file_size); 390 391 /* mark node changed and request update */ 392 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 393 if (vp->v_mount->mnt_flag & MNT_RELATIME) 394 udf_node->i_flags |= IN_ACCESS; 395 396 /* 397 * XXX TODO FFS has code here to reset setuid & setgid when we're not 398 * the superuser as a precaution against tampering. 399 */ 400 401 /* if we wrote a thing, note write action on vnode */ 402 if (resid > uio->uio_resid) 403 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 404 405 if (error) { 406 /* bring back file size to its former size */ 407 /* take notice of its errors? */ 408 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 409 410 /* roll back uio */ 411 uio->uio_offset -= resid - uio->uio_resid; 412 uio->uio_resid = resid; 413 } else { 414 /* if we write and we're synchronous, update node */ 415 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 416 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 417 } 418 419 return error; 420 } 421 422 423 /* --------------------------------------------------------------------- */ 424 425 /* 426 * `Special' bmap functionality that translates all incomming requests to 427 * translate to vop_strategy() calls with the same blocknumbers effectively 428 * not translating at all. 429 */ 430 431 int 432 udf_trivial_bmap(void *v) 433 { 434 struct vop_bmap_args /* { 435 struct vnode *a_vp; 436 daddr_t a_bn; 437 struct vnode **a_vpp; 438 daddr_t *a_bnp; 439 int *a_runp; 440 } */ *ap = v; 441 struct vnode *vp = ap->a_vp; /* our node */ 442 struct vnode **vpp = ap->a_vpp; /* return node */ 443 daddr_t *bnp = ap->a_bnp; /* translated */ 444 daddr_t bn = ap->a_bn; /* origional */ 445 int *runp = ap->a_runp; 446 struct udf_node *udf_node = VTOI(vp); 447 uint32_t lb_size; 448 449 /* get logical block size */ 450 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 451 452 /* could return `-1' to indicate holes/zeros */ 453 /* translate 1:1 */ 454 *bnp = bn; 455 456 /* set the vnode to read the data from with strategy on itself */ 457 if (vpp) 458 *vpp = vp; 459 460 /* set runlength of maximum block size */ 461 if (runp) 462 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 463 464 /* return success */ 465 return 0; 466 } 467 468 /* --------------------------------------------------------------------- */ 469 470 int 471 udf_vfsstrategy(void *v) 472 { 473 struct vop_strategy_args /* { 474 struct vnode *a_vp; 475 struct buf *a_bp; 476 } */ *ap = v; 477 struct vnode *vp = ap->a_vp; 478 struct buf *bp = ap->a_bp; 479 struct udf_node *udf_node = VTOI(vp); 480 uint32_t lb_size, sectors; 481 482 DPRINTF(STRATEGY, ("udf_strategy called\n")); 483 484 /* check if we ought to be here */ 485 if (vp->v_type == VBLK || vp->v_type == VCHR) 486 panic("udf_strategy: spec"); 487 488 /* only filebuffers ought to be read/write by this, no descriptors */ 489 assert(bp->b_blkno >= 0); 490 491 /* get sector size */ 492 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 493 494 /* calculate length to fetch/store in sectors */ 495 sectors = bp->b_bcount / lb_size; 496 assert(bp->b_bcount > 0); 497 498 /* NEVER assume later that this buffer is already translated */ 499 /* bp->b_lblkno = bp->b_blkno; */ 500 501 /* check assertions: we OUGHT to always get multiples of this */ 502 assert(sectors * lb_size == bp->b_bcount); 503 __USE(sectors); 504 505 /* issue buffer */ 506 if (bp->b_flags & B_READ) { 507 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 508 ", for %d sectors\n", 509 vp, bp, bp->b_blkno, sectors)); 510 511 /* read buffer from the udf_node, translate vtop on the way*/ 512 udf_read_filebuf(udf_node, bp); 513 } else { 514 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 515 ", for %d sectors\n", 516 vp, bp, bp->b_blkno, sectors)); 517 518 /* write buffer to the udf_node, translate vtop on the way*/ 519 udf_write_filebuf(udf_node, bp); 520 } 521 522 return bp->b_error; 523 } 524 525 /* --------------------------------------------------------------------- */ 526 527 int 528 udf_readdir(void *v) 529 { 530 struct vop_readdir_args /* { 531 struct vnode *a_vp; 532 struct uio *a_uio; 533 kauth_cred_t a_cred; 534 int *a_eofflag; 535 off_t **a_cookies; 536 int *a_ncookies; 537 } */ *ap = v; 538 struct uio *uio = ap->a_uio; 539 struct vnode *vp = ap->a_vp; 540 struct udf_node *udf_node = VTOI(vp); 541 struct file_entry *fe; 542 struct extfile_entry *efe; 543 struct fileid_desc *fid; 544 struct dirent *dirent; 545 uint64_t file_size, diroffset, transoffset; 546 uint32_t lb_size; 547 int error; 548 549 DPRINTF(READDIR, ("udf_readdir called\n")); 550 551 /* This operation only makes sense on directory nodes. */ 552 if (vp->v_type != VDIR) 553 return ENOTDIR; 554 555 /* get directory filesize */ 556 if (udf_node->fe) { 557 fe = udf_node->fe; 558 file_size = udf_rw64(fe->inf_len); 559 } else { 560 assert(udf_node->efe); 561 efe = udf_node->efe; 562 file_size = udf_rw64(efe->inf_len); 563 } 564 565 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 566 567 /* 568 * Add `.' pseudo entry if at offset zero since its not in the fid 569 * stream 570 */ 571 if (uio->uio_offset == 0) { 572 DPRINTF(READDIR, ("\t'.' inserted\n")); 573 strcpy(dirent->d_name, "."); 574 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 575 dirent->d_type = DT_DIR; 576 dirent->d_namlen = strlen(dirent->d_name); 577 dirent->d_reclen = _DIRENT_SIZE(dirent); 578 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 579 580 /* mark with magic value that we have done the dummy */ 581 uio->uio_offset = UDF_DIRCOOKIE_DOT; 582 } 583 584 /* we are called just as long as we keep on pushing data in */ 585 error = 0; 586 if (uio->uio_offset < file_size) { 587 /* allocate temporary space for fid */ 588 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 589 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 590 591 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 592 uio->uio_offset = 0; 593 594 diroffset = uio->uio_offset; 595 transoffset = diroffset; 596 while (diroffset < file_size) { 597 DPRINTF(READDIR, ("\tread in fid stream\n")); 598 /* transfer a new fid/dirent */ 599 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 600 DPRINTFIF(READDIR, error, ("read error in read fid " 601 "stream : %d\n", error)); 602 if (error) 603 break; 604 605 /* 606 * If there isn't enough space in the uio to return a 607 * whole dirent, break off read 608 */ 609 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 610 break; 611 612 /* remember the last entry we transferred */ 613 transoffset = diroffset; 614 615 /* skip deleted entries */ 616 if (fid->file_char & UDF_FILE_CHAR_DEL) 617 continue; 618 619 /* skip not visible files */ 620 if (fid->file_char & UDF_FILE_CHAR_VIS) 621 continue; 622 623 /* copy dirent to the caller */ 624 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 625 dirent->d_name, dirent->d_type)); 626 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 627 } 628 629 /* pass on last transfered offset */ 630 uio->uio_offset = transoffset; 631 free(fid, M_UDFTEMP); 632 } 633 634 if (ap->a_eofflag) 635 *ap->a_eofflag = (uio->uio_offset >= file_size); 636 637 #ifdef DEBUG 638 if (udf_verbose & UDF_DEBUG_READDIR) { 639 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 640 if (ap->a_eofflag) 641 printf("returning EOF ? %d\n", *ap->a_eofflag); 642 if (error) 643 printf("readdir returning error %d\n", error); 644 } 645 #endif 646 647 free(dirent, M_UDFTEMP); 648 return error; 649 } 650 651 /* --------------------------------------------------------------------- */ 652 653 int 654 udf_lookup(void *v) 655 { 656 struct vop_lookup_v2_args /* { 657 struct vnode *a_dvp; 658 struct vnode **a_vpp; 659 struct componentname *a_cnp; 660 } */ *ap = v; 661 struct vnode *dvp = ap->a_dvp; 662 struct vnode **vpp = ap->a_vpp; 663 struct componentname *cnp = ap->a_cnp; 664 struct udf_node *dir_node, *res_node; 665 struct udf_mount *ump; 666 struct long_ad icb_loc; 667 mode_t mode; 668 uid_t d_uid; 669 gid_t d_gid; 670 const char *name; 671 int namelen, nameiop, islastcn, mounted_ro; 672 int error, found; 673 674 dir_node = VTOI(dvp); 675 ump = dir_node->ump; 676 *vpp = NULL; 677 678 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 679 cnp->cn_nameptr)); 680 681 /* simplify/clarification flags */ 682 nameiop = cnp->cn_nameiop; 683 islastcn = cnp->cn_flags & ISLASTCN; 684 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 685 686 /* check exec/dirread permissions first */ 687 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 688 if (error) 689 return error; 690 691 DPRINTF(LOOKUP, ("\taccess ok\n")); 692 693 /* 694 * If requesting a modify on the last path element on a read-only 695 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 696 */ 697 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 698 return EROFS; 699 700 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 701 cnp->cn_nameptr)); 702 /* look in the namecache */ 703 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 704 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 705 return *vpp == NULLVP ? ENOENT : 0; 706 } 707 708 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 709 710 /* 711 * Obviously, the file is not (anymore) in the namecache, we have to 712 * search for it. There are three basic cases: '.', '..' and others. 713 * 714 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 715 */ 716 error = 0; 717 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 718 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 719 /* special case 1 '.' */ 720 if (islastcn && cnp->cn_nameiop == RENAME) { 721 error = EISDIR; 722 goto out; 723 } 724 vref(dvp); 725 *vpp = dvp; 726 /* done */ 727 goto done; 728 } else if (cnp->cn_flags & ISDOTDOT) { 729 /* special case 2 '..' */ 730 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 731 732 if (islastcn && cnp->cn_nameiop == RENAME) { 733 error = EINVAL; 734 goto out; 735 } 736 737 /* get our node */ 738 name = ".."; 739 namelen = 2; 740 error = udf_lookup_name_in_dir(dvp, name, namelen, 741 &icb_loc, &found); 742 if (error) 743 goto out; 744 if (!found) 745 error = ENOENT; 746 747 /* first unlock parent */ 748 VOP_UNLOCK(dvp); 749 750 if (error == 0) { 751 DPRINTF(LOOKUP, ("\tfound '..'\n")); 752 /* try to create/reuse the node */ 753 error = udf_get_node(ump, &icb_loc, &res_node, 754 LK_EXCLUSIVE); 755 756 if (!error) { 757 DPRINTF(LOOKUP, 758 ("\tnode retrieved/created OK\n")); 759 *vpp = res_node->vnode; 760 } 761 } 762 763 /* try to relock parent */ 764 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 765 goto out; 766 } 767 768 /* all other files */ 769 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 770 771 /* lookup filename in the directory; location icb_loc */ 772 name = cnp->cn_nameptr; 773 namelen = cnp->cn_namelen; 774 error = udf_lookup_name_in_dir(dvp, name, namelen, 775 &icb_loc, &found); 776 if (error) 777 goto out; 778 if (!found) { 779 DPRINTF(LOOKUP, ("\tNOT found\n")); 780 /* 781 * The entry was not found in the directory. This is 782 * valid if we are creating or renaming an entry and 783 * are working on the last component of the path name. 784 */ 785 if (islastcn && (cnp->cn_nameiop == CREATE || 786 cnp->cn_nameiop == RENAME)) { 787 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 788 if (error) { 789 goto out; 790 } 791 error = EJUSTRETURN; 792 } else { 793 error = ENOENT; 794 } 795 /* done */ 796 goto done; 797 } 798 799 /* 800 * XXX NOTE tmpfs has a test here that tests that intermediate 801 * components i.e. not the last one ought to be either a directory or 802 * a link. It seems to function well without this code. 803 */ 804 805 /* try to create/reuse the node */ 806 error = udf_get_node(ump, &icb_loc, &res_node, LK_EXCLUSIVE); 807 if (error) 808 goto out; 809 810 /* check permissions */ 811 if (islastcn && (cnp->cn_nameiop == DELETE || 812 cnp->cn_nameiop == RENAME) ) { 813 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 814 if (error) { 815 vput(res_node->vnode); 816 goto out; 817 } 818 819 /* 820 * Check if the directory has its sticky bit set. If so, ask 821 * for clearance since only the owner of a file or directory 822 * can remove/rename from taht directory. 823 */ 824 mode = udf_getaccessmode(dir_node); 825 if ((mode & S_ISTXT) != 0) { 826 udf_getownership(dir_node, &d_uid, &d_gid); 827 error = kauth_authorize_vnode(cnp->cn_cred, 828 KAUTH_VNODE_DELETE, res_node->vnode, 829 dir_node->vnode, genfs_can_sticky(dvp, cnp->cn_cred, 830 d_uid, d_uid)); 831 if (error) { 832 error = EPERM; 833 vput(res_node->vnode); 834 goto out; 835 } 836 } 837 } 838 839 *vpp = res_node->vnode; 840 841 done: 842 /* 843 * Store result in the cache if requested. If we are creating a file, 844 * the file might not be found and thus putting it into the namecache 845 * might be seen as negative caching. 846 */ 847 if (nameiop != CREATE) 848 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 849 cnp->cn_flags); 850 851 out: 852 if (error == 0 && *vpp != dvp) 853 VOP_UNLOCK(*vpp); 854 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 855 856 return error; 857 } 858 859 /* --------------------------------------------------------------------- */ 860 861 int 862 udf_getattr(void *v) 863 { 864 struct vop_getattr_args /* { 865 struct vnode *a_vp; 866 struct vattr *a_vap; 867 kauth_cred_t a_cred; 868 struct lwp *a_l; 869 } */ *ap = v; 870 struct vnode *vp = ap->a_vp; 871 struct udf_node *udf_node = VTOI(vp); 872 struct udf_mount *ump = udf_node->ump; 873 struct file_entry *fe = udf_node->fe; 874 struct extfile_entry *efe = udf_node->efe; 875 struct filetimes_extattr_entry *ft_extattr; 876 struct device_extattr_entry *devattr; 877 struct vattr *vap = ap->a_vap; 878 struct timestamp *atime, *mtime, *attrtime, *creatime; 879 uint64_t filesize, blkssize; 880 uint32_t nlink; 881 uint32_t offset, a_l; 882 uint8_t *filedata, *targetbuf; 883 uid_t uid; 884 gid_t gid; 885 int length, error; 886 887 DPRINTF(CALL, ("udf_getattr called\n")); 888 889 /* update times before we returning values */ 890 udf_itimes(udf_node, NULL, NULL, NULL); 891 892 /* get descriptor information */ 893 if (fe) { 894 nlink = udf_rw16(fe->link_cnt); 895 uid = (uid_t)udf_rw32(fe->uid); 896 gid = (gid_t)udf_rw32(fe->gid); 897 filesize = udf_rw64(fe->inf_len); 898 blkssize = udf_rw64(fe->logblks_rec); 899 atime = &fe->atime; 900 mtime = &fe->mtime; 901 attrtime = &fe->attrtime; 902 filedata = fe->data; 903 904 /* initial guess */ 905 creatime = mtime; 906 907 /* check our extended attribute if present */ 908 error = udf_extattr_search_intern(udf_node, 909 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 910 if (!error) { 911 ft_extattr = (struct filetimes_extattr_entry *) 912 (filedata + offset); 913 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 914 creatime = &ft_extattr->times[0]; 915 } 916 } else { 917 assert(udf_node->efe); 918 nlink = udf_rw16(efe->link_cnt); 919 uid = (uid_t)udf_rw32(efe->uid); 920 gid = (gid_t)udf_rw32(efe->gid); 921 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 922 blkssize = udf_rw64(efe->logblks_rec); 923 atime = &efe->atime; 924 mtime = &efe->mtime; 925 attrtime = &efe->attrtime; 926 creatime = &efe->ctime; 927 filedata = efe->data; 928 } 929 930 /* do the uid/gid translation game */ 931 if (uid == (uid_t) -1) 932 uid = ump->mount_args.anon_uid; 933 if (gid == (gid_t) -1) 934 gid = ump->mount_args.anon_gid; 935 936 /* fill in struct vattr with values from the node */ 937 vattr_null(vap); 938 vap->va_type = vp->v_type; 939 vap->va_mode = udf_getaccessmode(udf_node); 940 vap->va_nlink = nlink; 941 vap->va_uid = uid; 942 vap->va_gid = gid; 943 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 944 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 945 vap->va_size = filesize; 946 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 947 948 /* 949 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 950 * 1 to the link count if its a directory we're requested attributes 951 * of. 952 */ 953 if (vap->va_type == VDIR) 954 vap->va_nlink++; 955 956 /* 957 * BUG-ALERT: Posix requires the va_size to be pathlength for symbolic 958 * links. 959 */ 960 if (vap->va_type == VLNK) { 961 /* claim temporary buffers for translation */ 962 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 963 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 964 if (!error) { 965 vap->va_size = length; 966 KASSERT(length == strlen(targetbuf)); 967 } 968 free(targetbuf, M_UDFTEMP); 969 /* XXX return error? */ 970 } 971 972 /* access times */ 973 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 974 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 975 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 976 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 977 978 vap->va_gen = 1; /* no multiple generations yes (!?) */ 979 vap->va_flags = 0; /* no flags */ 980 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 981 vap->va_filerev = 1; /* TODO file revision numbers? */ 982 vap->va_vaflags = 0; 983 /* TODO get vaflags from the extended attributes? */ 984 985 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 986 error = udf_extattr_search_intern(udf_node, 987 UDF_DEVICESPEC_ATTR_NO, "", 988 &offset, &a_l); 989 /* if error, deny access */ 990 if (error || (filedata == NULL)) { 991 vap->va_mode = 0; /* or v_type = VNON? */ 992 } else { 993 devattr = (struct device_extattr_entry *) 994 filedata + offset; 995 vap->va_rdev = makedev( 996 udf_rw32(devattr->major), 997 udf_rw32(devattr->minor) 998 ); 999 /* TODO we could check the implementator */ 1000 } 1001 } 1002 1003 return 0; 1004 } 1005 1006 /* --------------------------------------------------------------------- */ 1007 1008 static int 1009 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 1010 kauth_cred_t cred) 1011 { 1012 struct udf_node *udf_node = VTOI(vp); 1013 uid_t uid; 1014 gid_t gid; 1015 int error; 1016 1017 #ifdef notyet 1018 /* TODO get vaflags from the extended attributes? */ 1019 /* Immutable or append-only files cannot be modified, either. */ 1020 if (udf_node->flags & (IMMUTABLE | APPEND)) 1021 return EPERM; 1022 #endif 1023 1024 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1025 return EROFS; 1026 1027 /* retrieve old values */ 1028 udf_getownership(udf_node, &uid, &gid); 1029 1030 /* only one could be specified */ 1031 if (new_uid == VNOVAL) 1032 new_uid = uid; 1033 if (new_gid == VNOVAL) 1034 new_gid = gid; 1035 1036 /* check if we can fit it in an 32 bits */ 1037 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1038 return EINVAL; 1039 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1040 return EINVAL; 1041 1042 /* check permissions */ 1043 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1044 vp, NULL, genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid)); 1045 if (error) 1046 return (error); 1047 1048 /* change the ownership */ 1049 udf_setownership(udf_node, new_uid, new_gid); 1050 1051 /* mark node changed */ 1052 udf_node->i_flags |= IN_CHANGE; 1053 1054 return 0; 1055 } 1056 1057 1058 static int 1059 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1060 { 1061 struct udf_node *udf_node = VTOI(vp); 1062 uid_t uid; 1063 gid_t gid; 1064 int error; 1065 1066 #ifdef notyet 1067 /* TODO get vaflags from the extended attributes? */ 1068 /* Immutable or append-only files cannot be modified, either. */ 1069 if (udf_node->flags & (IMMUTABLE | APPEND)) 1070 return EPERM; 1071 #endif 1072 1073 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1074 return EROFS; 1075 1076 /* retrieve uid/gid values */ 1077 udf_getownership(udf_node, &uid, &gid); 1078 1079 /* check permissions */ 1080 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1081 NULL, genfs_can_chmod(vp, cred, uid, gid, mode)); 1082 if (error) 1083 return (error); 1084 1085 /* change mode */ 1086 udf_setaccessmode(udf_node, mode); 1087 1088 /* mark node changed */ 1089 udf_node->i_flags |= IN_CHANGE; 1090 1091 return 0; 1092 } 1093 1094 1095 /* exported */ 1096 int 1097 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1098 { 1099 struct udf_node *udf_node = VTOI(vp); 1100 int error, extended; 1101 1102 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1103 return EROFS; 1104 1105 /* Decide whether this is a valid operation based on the file type. */ 1106 switch (vp->v_type) { 1107 case VDIR: 1108 return EISDIR; 1109 case VREG: 1110 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1111 return EROFS; 1112 break; 1113 case VBLK: 1114 /* FALLTHROUGH */ 1115 case VCHR: 1116 /* FALLTHROUGH */ 1117 case VFIFO: 1118 /* Allow modifications of special files even if in the file 1119 * system is mounted read-only (we are not modifying the 1120 * files themselves, but the objects they represent). */ 1121 return 0; 1122 default: 1123 /* Anything else is unsupported. */ 1124 return EOPNOTSUPP; 1125 } 1126 1127 #if notyet 1128 /* TODO get vaflags from the extended attributes? */ 1129 /* Immutable or append-only files cannot be modified, either. */ 1130 if (node->flags & (IMMUTABLE | APPEND)) 1131 return EPERM; 1132 #endif 1133 1134 /* resize file to the requested size */ 1135 error = udf_resize_node(udf_node, newsize, &extended); 1136 1137 if (error == 0) { 1138 /* mark change */ 1139 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1140 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1141 udf_node->i_flags |= IN_ACCESS; 1142 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1143 udf_update(vp, NULL, NULL, NULL, 0); 1144 } 1145 1146 return error; 1147 } 1148 1149 1150 static int 1151 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1152 { 1153 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1154 return EROFS; 1155 1156 /* 1157 * XXX we can't do this yet, as its not described in the standard yet 1158 */ 1159 1160 return EOPNOTSUPP; 1161 } 1162 1163 1164 static int 1165 udf_chtimes(struct vnode *vp, 1166 struct timespec *atime, struct timespec *mtime, 1167 struct timespec *birthtime, int setattrflags, 1168 kauth_cred_t cred) 1169 { 1170 struct udf_node *udf_node = VTOI(vp); 1171 uid_t uid; 1172 gid_t gid; 1173 int error; 1174 1175 #ifdef notyet 1176 /* TODO get vaflags from the extended attributes? */ 1177 /* Immutable or append-only files cannot be modified, either. */ 1178 if (udf_node->flags & (IMMUTABLE | APPEND)) 1179 return EPERM; 1180 #endif 1181 1182 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1183 return EROFS; 1184 1185 /* retrieve uid/gid values */ 1186 udf_getownership(udf_node, &uid, &gid); 1187 1188 /* check permissions */ 1189 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1190 NULL, genfs_can_chtimes(vp, cred, uid, setattrflags)); 1191 if (error) 1192 return (error); 1193 1194 /* update node flags depending on what times are passed */ 1195 if (atime->tv_sec != VNOVAL) 1196 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1197 udf_node->i_flags |= IN_ACCESS; 1198 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1199 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1200 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1201 udf_node->i_flags |= IN_ACCESS; 1202 } 1203 1204 return udf_update(vp, atime, mtime, birthtime, 0); 1205 } 1206 1207 1208 int 1209 udf_setattr(void *v) 1210 { 1211 struct vop_setattr_args /* { 1212 struct vnode *a_vp; 1213 struct vattr *a_vap; 1214 kauth_cred_t a_cred; 1215 struct lwp *a_l; 1216 } */ *ap = v; 1217 struct vnode *vp = ap->a_vp; 1218 /* struct udf_node *udf_node = VTOI(vp); */ 1219 /* struct udf_mount *ump = udf_node->ump; */ 1220 kauth_cred_t cred = ap->a_cred; 1221 struct vattr *vap = ap->a_vap; 1222 int error; 1223 1224 DPRINTF(CALL, ("udf_setattr called\n")); 1225 1226 /* Abort if any unsettable attribute is given. */ 1227 error = 0; 1228 if (vap->va_type != VNON || 1229 vap->va_nlink != VNOVAL || 1230 vap->va_fsid != VNOVAL || 1231 vap->va_fileid != VNOVAL || 1232 vap->va_blocksize != VNOVAL || 1233 #ifdef notyet 1234 /* checks are debated */ 1235 vap->va_ctime.tv_sec != VNOVAL || 1236 vap->va_ctime.tv_nsec != VNOVAL || 1237 vap->va_birthtime.tv_sec != VNOVAL || 1238 vap->va_birthtime.tv_nsec != VNOVAL || 1239 #endif 1240 vap->va_gen != VNOVAL || 1241 vap->va_rdev != VNOVAL || 1242 vap->va_bytes != VNOVAL) 1243 error = EINVAL; 1244 1245 DPRINTF(ATTR, ("setattr changing:\n")); 1246 if (error == 0 && (vap->va_flags != VNOVAL)) { 1247 DPRINTF(ATTR, ("\tchflags\n")); 1248 error = udf_chflags(vp, vap->va_flags, cred); 1249 } 1250 1251 if (error == 0 && (vap->va_size != VNOVAL)) { 1252 DPRINTF(ATTR, ("\tchsize\n")); 1253 error = udf_chsize(vp, vap->va_size, cred); 1254 } 1255 1256 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1257 DPRINTF(ATTR, ("\tchown\n")); 1258 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1259 } 1260 1261 if (error == 0 && (vap->va_mode != VNOVAL)) { 1262 DPRINTF(ATTR, ("\tchmod\n")); 1263 error = udf_chmod(vp, vap->va_mode, cred); 1264 } 1265 1266 if (error == 0 && 1267 ((vap->va_atime.tv_sec != VNOVAL && 1268 vap->va_atime.tv_nsec != VNOVAL) || 1269 (vap->va_mtime.tv_sec != VNOVAL && 1270 vap->va_mtime.tv_nsec != VNOVAL)) 1271 ) { 1272 DPRINTF(ATTR, ("\tchtimes\n")); 1273 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1274 &vap->va_birthtime, vap->va_vaflags, cred); 1275 } 1276 VN_KNOTE(vp, NOTE_ATTRIB); 1277 1278 return error; 1279 } 1280 1281 /* --------------------------------------------------------------------- */ 1282 1283 /* 1284 * Return POSIX pathconf information for UDF file systems. 1285 */ 1286 int 1287 udf_pathconf(void *v) 1288 { 1289 struct vop_pathconf_args /* { 1290 struct vnode *a_vp; 1291 int a_name; 1292 register_t *a_retval; 1293 } */ *ap = v; 1294 uint32_t bits; 1295 1296 DPRINTF(CALL, ("udf_pathconf called\n")); 1297 1298 switch (ap->a_name) { 1299 case _PC_LINK_MAX: 1300 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1301 return 0; 1302 case _PC_NAME_MAX: 1303 *ap->a_retval = UDF_MAXNAMLEN; 1304 return 0; 1305 case _PC_PATH_MAX: 1306 *ap->a_retval = PATH_MAX; 1307 return 0; 1308 case _PC_PIPE_BUF: 1309 *ap->a_retval = PIPE_BUF; 1310 return 0; 1311 case _PC_CHOWN_RESTRICTED: 1312 *ap->a_retval = 1; 1313 return 0; 1314 case _PC_NO_TRUNC: 1315 *ap->a_retval = 1; 1316 return 0; 1317 case _PC_SYNC_IO: 1318 *ap->a_retval = 0; /* synchronised is off for performance */ 1319 return 0; 1320 case _PC_FILESIZEBITS: 1321 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1322 bits = 64; /* XXX ought to deliver 65 */ 1323 #if 0 1324 if (udf_node) 1325 bits = 64 * vp->v_mount->mnt_dev_bshift; 1326 #endif 1327 *ap->a_retval = bits; 1328 return 0; 1329 default: 1330 return genfs_pathconf(ap); 1331 } 1332 } 1333 1334 1335 /* --------------------------------------------------------------------- */ 1336 1337 int 1338 udf_open(void *v) 1339 { 1340 struct vop_open_args /* { 1341 struct vnode *a_vp; 1342 int a_mode; 1343 kauth_cred_t a_cred; 1344 struct proc *a_p; 1345 } */ *ap = v; 1346 int flags; 1347 1348 DPRINTF(CALL, ("udf_open called\n")); 1349 1350 /* 1351 * Files marked append-only must be opened for appending. 1352 * TODO: get chflags(2) flags from extened attribute. 1353 */ 1354 flags = 0; 1355 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1356 return (EPERM); 1357 1358 return 0; 1359 } 1360 1361 1362 /* --------------------------------------------------------------------- */ 1363 1364 int 1365 udf_close(void *v) 1366 { 1367 struct vop_close_args /* { 1368 struct vnode *a_vp; 1369 int a_fflag; 1370 kauth_cred_t a_cred; 1371 struct proc *a_p; 1372 } */ *ap = v; 1373 struct vnode *vp = ap->a_vp; 1374 struct udf_node *udf_node = VTOI(vp); 1375 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1376 int error; 1377 1378 DPRINTF(CALL, ("udf_close called\n")); 1379 udf_node = udf_node; /* shut up gcc */ 1380 1381 if (!async && (vp->v_type != VDIR)) { 1382 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 1383 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1384 if (error) 1385 return error; 1386 } 1387 1388 mutex_enter(vp->v_interlock); 1389 if (vrefcnt(vp) > 1) 1390 udf_itimes(udf_node, NULL, NULL, NULL); 1391 mutex_exit(vp->v_interlock); 1392 1393 return 0; 1394 } 1395 1396 1397 /* --------------------------------------------------------------------- */ 1398 1399 static int 1400 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1401 { 1402 int flags; 1403 1404 /* check if we are allowed to write */ 1405 switch (vap->va_type) { 1406 case VDIR: 1407 case VLNK: 1408 case VREG: 1409 /* 1410 * normal nodes: check if we're on a read-only mounted 1411 * filingsystem and bomb out if we're trying to write. 1412 */ 1413 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1414 return EROFS; 1415 break; 1416 case VBLK: 1417 case VCHR: 1418 case VSOCK: 1419 case VFIFO: 1420 /* 1421 * special nodes: even on read-only mounted filingsystems 1422 * these are allowed to be written to if permissions allow. 1423 */ 1424 break; 1425 default: 1426 /* no idea what this is */ 1427 return EINVAL; 1428 } 1429 1430 /* noone may write immutable files */ 1431 /* TODO: get chflags(2) flags from extened attribute. */ 1432 flags = 0; 1433 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1434 return EPERM; 1435 1436 return 0; 1437 } 1438 1439 static int 1440 udf_check_permitted(struct vnode *vp, struct vattr *vap, accmode_t accmode, 1441 kauth_cred_t cred) 1442 { 1443 /* ask the generic genfs_can_access to advice on security */ 1444 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 1445 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp, cred, 1446 vap->va_uid, vap->va_gid, vap->va_mode, NULL, accmode)); 1447 } 1448 1449 int 1450 udf_access(void *v) 1451 { 1452 struct vop_access_args /* { 1453 struct vnode *a_vp; 1454 accmode_t a_accmode; 1455 kauth_cred_t a_cred; 1456 struct proc *a_p; 1457 } */ *ap = v; 1458 struct vnode *vp = ap->a_vp; 1459 accmode_t accmode = ap->a_accmode; 1460 kauth_cred_t cred = ap->a_cred; 1461 /* struct udf_node *udf_node = VTOI(vp); */ 1462 struct vattr vap; 1463 int error; 1464 1465 DPRINTF(CALL, ("udf_access called\n")); 1466 1467 error = VOP_GETATTR(vp, &vap, NULL); 1468 if (error) 1469 return error; 1470 1471 error = udf_check_possible(vp, &vap, accmode); 1472 if (error) 1473 return error; 1474 1475 error = udf_check_permitted(vp, &vap, accmode, cred); 1476 1477 return error; 1478 } 1479 1480 /* --------------------------------------------------------------------- */ 1481 1482 int 1483 udf_create(void *v) 1484 { 1485 struct vop_create_v3_args /* { 1486 struct vnode *a_dvp; 1487 struct vnode **a_vpp; 1488 struct componentname *a_cnp; 1489 struct vattr *a_vap; 1490 } */ *ap = v; 1491 struct vnode *dvp = ap->a_dvp; 1492 struct vnode **vpp = ap->a_vpp; 1493 struct vattr *vap = ap->a_vap; 1494 struct componentname *cnp = ap->a_cnp; 1495 int error; 1496 1497 DPRINTF(CALL, ("udf_create called\n")); 1498 error = udf_create_node(dvp, vpp, vap, cnp); 1499 1500 return error; 1501 } 1502 1503 /* --------------------------------------------------------------------- */ 1504 1505 int 1506 udf_mknod(void *v) 1507 { 1508 struct vop_mknod_v3_args /* { 1509 struct vnode *a_dvp; 1510 struct vnode **a_vpp; 1511 struct componentname *a_cnp; 1512 struct vattr *a_vap; 1513 } */ *ap = v; 1514 struct vnode *dvp = ap->a_dvp; 1515 struct vnode **vpp = ap->a_vpp; 1516 struct vattr *vap = ap->a_vap; 1517 struct componentname *cnp = ap->a_cnp; 1518 int error; 1519 1520 DPRINTF(CALL, ("udf_mknod called\n")); 1521 error = udf_create_node(dvp, vpp, vap, cnp); 1522 1523 return error; 1524 } 1525 1526 /* --------------------------------------------------------------------- */ 1527 1528 int 1529 udf_mkdir(void *v) 1530 { 1531 struct vop_mkdir_v3_args /* { 1532 struct vnode *a_dvp; 1533 struct vnode **a_vpp; 1534 struct componentname *a_cnp; 1535 struct vattr *a_vap; 1536 } */ *ap = v; 1537 struct vnode *dvp = ap->a_dvp; 1538 struct vnode **vpp = ap->a_vpp; 1539 struct vattr *vap = ap->a_vap; 1540 struct componentname *cnp = ap->a_cnp; 1541 int error; 1542 1543 DPRINTF(CALL, ("udf_mkdir called\n")); 1544 error = udf_create_node(dvp, vpp, vap, cnp); 1545 1546 return error; 1547 } 1548 1549 /* --------------------------------------------------------------------- */ 1550 1551 static int 1552 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1553 { 1554 struct udf_node *udf_node, *dir_node; 1555 struct vattr vap; 1556 int error; 1557 1558 DPRINTF(CALL, ("udf_link called\n")); 1559 KASSERT(dvp != vp); 1560 KASSERT(vp->v_type != VDIR); 1561 KASSERT(dvp->v_mount == vp->v_mount); 1562 1563 /* get attributes */ 1564 dir_node = VTOI(dvp); 1565 udf_node = VTOI(vp); 1566 1567 error = VOP_GETATTR(vp, &vap, FSCRED); 1568 if (error) { 1569 VOP_UNLOCK(vp); 1570 return error; 1571 } 1572 1573 /* check link count overflow */ 1574 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1575 VOP_UNLOCK(vp); 1576 return EMLINK; 1577 } 1578 1579 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1580 if (error) 1581 VOP_UNLOCK(vp); 1582 return error; 1583 } 1584 1585 int 1586 udf_link(void *v) 1587 { 1588 struct vop_link_v2_args /* { 1589 struct vnode *a_dvp; 1590 struct vnode *a_vp; 1591 struct componentname *a_cnp; 1592 } */ *ap = v; 1593 struct vnode *dvp = ap->a_dvp; 1594 struct vnode *vp = ap->a_vp; 1595 struct componentname *cnp = ap->a_cnp; 1596 int error; 1597 1598 error = udf_do_link(dvp, vp, cnp); 1599 if (error) 1600 VOP_ABORTOP(dvp, cnp); 1601 1602 VN_KNOTE(vp, NOTE_LINK); 1603 VN_KNOTE(dvp, NOTE_WRITE); 1604 1605 return error; 1606 } 1607 1608 /* --------------------------------------------------------------------- */ 1609 1610 static int 1611 udf_do_symlink(struct udf_node *udf_node, char *target) 1612 { 1613 struct pathcomp pathcomp; 1614 uint8_t *pathbuf, *pathpos, *compnamepos; 1615 char *mntonname; 1616 int pathlen, len, compnamelen, mntonnamelen; 1617 int error; 1618 1619 /* process `target' to an UDF structure */ 1620 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1621 pathpos = pathbuf; 1622 pathlen = 0; 1623 1624 if (*target == '/') { 1625 /* symlink starts from the root */ 1626 len = UDF_PATH_COMP_SIZE; 1627 memset(&pathcomp, 0, len); 1628 pathcomp.type = UDF_PATH_COMP_ROOT; 1629 1630 /* check if its mount-point relative! */ 1631 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1632 mntonnamelen = strlen(mntonname); 1633 if (strlen(target) >= mntonnamelen) { 1634 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1635 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1636 target += mntonnamelen; 1637 } 1638 } else { 1639 target++; 1640 } 1641 1642 memcpy(pathpos, &pathcomp, len); 1643 pathpos += len; 1644 pathlen += len; 1645 } 1646 1647 error = 0; 1648 while (*target) { 1649 /* ignore multiple '/' */ 1650 while (*target == '/') { 1651 target++; 1652 } 1653 if (!*target) 1654 break; 1655 1656 /* extract component name */ 1657 compnamelen = 0; 1658 compnamepos = target; 1659 while ((*target) && (*target != '/')) { 1660 target++; 1661 compnamelen++; 1662 } 1663 1664 /* just trunc if too long ?? (security issue) */ 1665 if (compnamelen >= 127) { 1666 error = ENAMETOOLONG; 1667 break; 1668 } 1669 1670 /* convert unix name to UDF name */ 1671 len = sizeof(struct pathcomp); 1672 memset(&pathcomp, 0, len); 1673 pathcomp.type = UDF_PATH_COMP_NAME; 1674 len = UDF_PATH_COMP_SIZE; 1675 1676 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1677 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1678 if ((compnamelen == 1) && (*compnamepos == '.')) 1679 pathcomp.type = UDF_PATH_COMP_CURDIR; 1680 1681 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1682 unix_to_udf_name( 1683 (char *) &pathcomp.ident, &pathcomp.l_ci, 1684 compnamepos, compnamelen, 1685 &udf_node->ump->logical_vol->desc_charset); 1686 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1687 } 1688 1689 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1690 error = ENAMETOOLONG; 1691 break; 1692 } 1693 1694 memcpy(pathpos, &pathcomp, len); 1695 pathpos += len; 1696 pathlen += len; 1697 } 1698 1699 if (error) { 1700 /* aparently too big */ 1701 free(pathbuf, M_UDFTEMP); 1702 return error; 1703 } 1704 1705 error = udf_grow_node(udf_node, pathlen); 1706 if (error) { 1707 /* failed to pregrow node */ 1708 free(pathbuf, M_UDFTEMP); 1709 return error; 1710 } 1711 1712 /* write out structure on the new file */ 1713 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1714 pathbuf, pathlen, 0, 1715 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1716 FSCRED, NULL, NULL); 1717 1718 /* return status of symlink contents writeout */ 1719 free(pathbuf, M_UDFTEMP); 1720 return error; 1721 } 1722 1723 1724 int 1725 udf_symlink(void *v) 1726 { 1727 struct vop_symlink_v3_args /* { 1728 struct vnode *a_dvp; 1729 struct vnode **a_vpp; 1730 struct componentname *a_cnp; 1731 struct vattr *a_vap; 1732 char *a_target; 1733 } */ *ap = v; 1734 struct vnode *dvp = ap->a_dvp; 1735 struct vnode **vpp = ap->a_vpp; 1736 struct vattr *vap = ap->a_vap; 1737 struct componentname *cnp = ap->a_cnp; 1738 struct udf_node *dir_node; 1739 struct udf_node *udf_node; 1740 int error; 1741 1742 DPRINTF(CALL, ("udf_symlink called\n")); 1743 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1744 error = udf_create_node(dvp, vpp, vap, cnp); 1745 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1746 if (!error) { 1747 dir_node = VTOI(dvp); 1748 udf_node = VTOI(*vpp); 1749 KASSERT(udf_node); 1750 error = udf_do_symlink(udf_node, ap->a_target); 1751 if (error) { 1752 /* remove node */ 1753 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1754 vrele(*vpp); 1755 *vpp = NULL; 1756 } 1757 } 1758 return error; 1759 } 1760 1761 /* --------------------------------------------------------------------- */ 1762 1763 static int 1764 udf_do_readlink(struct udf_node *udf_node, uint64_t filesize, 1765 uint8_t *targetbuf, int *length) 1766 { 1767 struct pathcomp pathcomp; 1768 uint8_t *pathbuf, *tmpname; 1769 uint8_t *pathpos, *targetpos; 1770 char *mntonname; 1771 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1772 int first, error; 1773 1774 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1775 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1776 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1777 memset(targetbuf, 0, PATH_MAX); 1778 1779 /* read contents of file in our temporary buffer */ 1780 error = vn_rdwr(UIO_READ, udf_node->vnode, 1781 pathbuf, filesize, 0, 1782 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1783 FSCRED, NULL, NULL); 1784 if (error) { 1785 /* failed to read in symlink contents */ 1786 free(pathbuf, 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 (filesize - 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 (filesize-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 (filesize-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 (filesize - pathlen > 0) 1881 error = EINVAL; 1882 1883 free(pathbuf, M_UDFTEMP); 1884 free(tmpname, M_UDFTEMP); 1885 1886 *length = PATH_MAX - targetlen; 1887 return error; 1888 } 1889 1890 1891 int 1892 udf_readlink(void *v) 1893 { 1894 struct vop_readlink_args /* { 1895 struct vnode *a_vp; 1896 struct uio *a_uio; 1897 kauth_cred_t a_cred; 1898 } */ *ap = v; 1899 struct vnode *vp = ap->a_vp; 1900 struct udf_node *udf_node = VTOI(vp); 1901 struct file_entry *fe = udf_node->fe; 1902 struct extfile_entry *efe = udf_node->efe; 1903 struct uio *uio = ap->a_uio; 1904 uint64_t filesize; 1905 uint8_t *targetbuf; 1906 int length; 1907 int error; 1908 1909 DPRINTF(CALL, ("udf_readlink called\n")); 1910 1911 if (fe) { 1912 filesize = udf_rw64(fe->inf_len); 1913 } else { 1914 assert(udf_node->efe); 1915 filesize = udf_rw64(efe->inf_len); 1916 } 1917 1918 /* claim temporary buffers for translation */ 1919 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1920 1921 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 1922 1923 /* uiomove() to destination */ 1924 if (!error) 1925 uiomove(targetbuf, length, uio); 1926 1927 free(targetbuf, M_UDFTEMP); 1928 return error; 1929 } 1930 1931 /* --------------------------------------------------------------------- */ 1932 1933 /* 1934 * udf_rename() moved to udf_rename.c 1935 */ 1936 1937 /* --------------------------------------------------------------------- */ 1938 1939 int 1940 udf_remove(void *v) 1941 { 1942 struct vop_remove_v2_args /* { 1943 struct vnode *a_dvp; 1944 struct vnode *a_vp; 1945 struct componentname *a_cnp; 1946 } */ *ap = v; 1947 struct vnode *dvp = ap->a_dvp; 1948 struct vnode *vp = ap->a_vp; 1949 struct componentname *cnp = ap->a_cnp; 1950 struct udf_node *dir_node = VTOI(dvp); 1951 struct udf_node *udf_node = VTOI(vp); 1952 struct udf_mount *ump = dir_node->ump; 1953 int error; 1954 1955 DPRINTF(CALL, ("udf_remove called\n")); 1956 if (vp->v_type != VDIR) { 1957 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1958 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1959 } else { 1960 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1961 error = EPERM; 1962 } 1963 1964 if (error == 0) { 1965 VN_KNOTE(vp, NOTE_DELETE); 1966 VN_KNOTE(dvp, NOTE_WRITE); 1967 } 1968 1969 if (dvp == vp) 1970 vrele(vp); 1971 else 1972 vput(vp); 1973 1974 return error; 1975 } 1976 1977 /* --------------------------------------------------------------------- */ 1978 1979 int 1980 udf_rmdir(void *v) 1981 { 1982 struct vop_rmdir_v2_args /* { 1983 struct vnode *a_dvp; 1984 struct vnode *a_vp; 1985 struct componentname *a_cnp; 1986 } */ *ap = v; 1987 struct vnode *vp = ap->a_vp; 1988 struct vnode *dvp = ap->a_dvp; 1989 struct componentname *cnp = ap->a_cnp; 1990 struct udf_node *dir_node = VTOI(dvp); 1991 struct udf_node *udf_node = VTOI(vp); 1992 struct udf_mount *ump = dir_node->ump; 1993 int error, isempty; 1994 1995 DPRINTF(CALL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1996 1997 /* don't allow '.' to be deleted */ 1998 if (dir_node == udf_node) { 1999 vrele(vp); 2000 return EINVAL; 2001 } 2002 2003 /* make sure our `leaf' node's hash is populated */ 2004 dirhash_get(&udf_node->dir_hash); 2005 error = udf_dirhash_fill(udf_node); 2006 if (error) { 2007 dirhash_put(udf_node->dir_hash); 2008 return error; 2009 } 2010 2011 /* check to see if the directory is empty */ 2012 isempty = dirhash_dir_isempty(udf_node->dir_hash); 2013 dirhash_put(udf_node->dir_hash); 2014 2015 if (!isempty) { 2016 vput(vp); 2017 return ENOTEMPTY; 2018 } 2019 2020 /* detach the node from the directory, udf_node is an empty dir here */ 2021 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2022 if (error == 0) { 2023 cache_purge(vp); 2024 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2025 /* 2026 * Bug alert: we need to remove '..' from the detaching 2027 * udf_node so further lookups of this are not possible. This 2028 * prevents a process in a deleted directory from going to its 2029 * deleted parent. Since `udf_node' is garanteed to be empty 2030 * here, trunc it so no fids are there. 2031 */ 2032 dirhash_purge(&udf_node->dir_hash); 2033 udf_shrink_node(udf_node, 0); 2034 VN_KNOTE(vp, NOTE_DELETE); 2035 } 2036 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 2037 2038 /* put the node and exit */ 2039 vput(vp); 2040 2041 return error; 2042 } 2043 2044 /* --------------------------------------------------------------------- */ 2045 2046 int 2047 udf_fsync(void *v) 2048 { 2049 struct vop_fsync_args /* { 2050 struct vnode *a_vp; 2051 kauth_cred_t a_cred; 2052 int a_flags; 2053 off_t offlo; 2054 off_t offhi; 2055 struct proc *a_p; 2056 } */ *ap = v; 2057 struct vnode *vp = ap->a_vp; 2058 struct udf_node *udf_node = VTOI(vp); 2059 int error, flags, wait; 2060 2061 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2062 udf_node, 2063 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2064 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2065 2066 /* flush data and wait for it when requested */ 2067 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2068 error = vflushbuf(vp, ap->a_flags); 2069 if (error) 2070 return error; 2071 2072 if (udf_node == NULL) { 2073 printf("udf_fsync() called on NULL udf_node!\n"); 2074 return 0; 2075 } 2076 if (vp->v_tag != VT_UDF) { 2077 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2078 return 0; 2079 } 2080 2081 /* set our times */ 2082 udf_itimes(udf_node, NULL, NULL, NULL); 2083 2084 /* if called when mounted readonly, never write back */ 2085 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2086 return 0; 2087 2088 /* if only data is requested, return */ 2089 if (ap->a_flags & FSYNC_DATAONLY) 2090 return 0; 2091 2092 /* check if the node is dirty 'enough'*/ 2093 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2094 if (flags == 0) 2095 return 0; 2096 2097 /* if we don't have to wait, check for IO pending */ 2098 if (!wait) { 2099 if (vp->v_numoutput > 0) { 2100 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2101 return 0; 2102 } 2103 if (udf_node->outstanding_bufs > 0) { 2104 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2105 return 0; 2106 } 2107 if (udf_node->outstanding_nodedscr > 0) { 2108 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2109 return 0; 2110 } 2111 } 2112 2113 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2114 if (wait) { 2115 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2116 mutex_enter(vp->v_interlock); 2117 while (vp->v_numoutput) { 2118 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2119 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2120 } 2121 mutex_exit(vp->v_interlock); 2122 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2123 } 2124 2125 /* write out node and wait for it if requested */ 2126 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2127 error = udf_writeout_node(udf_node, wait); 2128 if (error) 2129 return error; 2130 2131 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2132 2133 return 0; 2134 } 2135 2136 /* --------------------------------------------------------------------- */ 2137 2138 int 2139 udf_advlock(void *v) 2140 { 2141 struct vop_advlock_args /* { 2142 struct vnode *a_vp; 2143 void *a_id; 2144 int a_op; 2145 struct flock *a_fl; 2146 int a_flags; 2147 } */ *ap = v; 2148 struct vnode *vp = ap->a_vp; 2149 struct udf_node *udf_node = VTOI(vp); 2150 struct file_entry *fe; 2151 struct extfile_entry *efe; 2152 uint64_t file_size; 2153 2154 DPRINTF(LOCKING, ("udf_advlock called\n")); 2155 2156 /* get directory filesize */ 2157 if (udf_node->fe) { 2158 fe = udf_node->fe; 2159 file_size = udf_rw64(fe->inf_len); 2160 } else { 2161 assert(udf_node->efe); 2162 efe = udf_node->efe; 2163 file_size = udf_rw64(efe->inf_len); 2164 } 2165 2166 return lf_advlock(ap, &udf_node->lockf, file_size); 2167 } 2168 2169 /* --------------------------------------------------------------------- */ 2170 2171 /* Global vfs vnode data structures for udfs */ 2172 int (**udf_vnodeop_p)(void *); 2173 2174 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2175 { &vop_default_desc, vn_default_error }, 2176 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2177 { &vop_create_desc, udf_create }, /* create */ 2178 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2179 { &vop_open_desc, udf_open }, /* open */ 2180 { &vop_close_desc, udf_close }, /* close */ 2181 { &vop_access_desc, udf_access }, /* access */ 2182 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 2183 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2184 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2185 { &vop_read_desc, udf_read }, /* read */ 2186 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2187 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 2188 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 2189 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2190 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2191 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2192 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2193 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2194 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2195 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2196 { &vop_seek_desc, genfs_seek }, /* seek */ 2197 { &vop_remove_desc, udf_remove }, /* remove */ 2198 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2199 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2200 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2201 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2202 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2203 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2204 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2205 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2206 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2207 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2208 { &vop_lock_desc, genfs_lock }, /* lock */ 2209 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2210 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2211 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2212 /* { &vop_print_desc, udf_print }, */ /* print */ 2213 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2214 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2215 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2216 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2217 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2218 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2219 { NULL, NULL } 2220 }; 2221 2222 2223 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2224 &udf_vnodeop_p, udf_vnodeop_entries 2225 }; 2226