udf_vnops.c revision 1.107
1 /* $NetBSD: udf_vnops.c,v 1.107 2019/12/27 09:41:51 msaitoh 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 1.107 2019/12/27 09:41:51 msaitoh 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_UNMAP_FLAG(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_UNMAP_FLAG(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 mutex_enter(vp->v_interlock); 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); 754 755 if (!error) { 756 DPRINTF(LOOKUP, 757 ("\tnode retrieved/created OK\n")); 758 *vpp = res_node->vnode; 759 } 760 } 761 762 /* try to relock parent */ 763 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 764 goto out; 765 } 766 767 /* all other files */ 768 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 769 770 /* lookup filename in the directory; location icb_loc */ 771 name = cnp->cn_nameptr; 772 namelen = cnp->cn_namelen; 773 error = udf_lookup_name_in_dir(dvp, name, namelen, 774 &icb_loc, &found); 775 if (error) 776 goto out; 777 if (!found) { 778 DPRINTF(LOOKUP, ("\tNOT found\n")); 779 /* 780 * The entry was not found in the directory. This is 781 * valid if we are creating or renaming an entry and 782 * are working on the last component of the path name. 783 */ 784 if (islastcn && (cnp->cn_nameiop == CREATE || 785 cnp->cn_nameiop == RENAME)) { 786 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 787 if (error) { 788 goto out; 789 } 790 error = EJUSTRETURN; 791 } else { 792 error = ENOENT; 793 } 794 /* done */ 795 goto done; 796 } 797 798 /* 799 * XXX NOTE tmpfs has a test here that tests that intermediate 800 * components i.e. not the last one ought to be either a directory or 801 * a link. It seems to function well without this code. 802 */ 803 804 /* try to create/reuse the node */ 805 error = udf_get_node(ump, &icb_loc, &res_node); 806 if (error) 807 goto out; 808 809 /* check permissions */ 810 if (islastcn && (cnp->cn_nameiop == DELETE || 811 cnp->cn_nameiop == RENAME) ) { 812 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 813 if (error) { 814 vput(res_node->vnode); 815 goto out; 816 } 817 818 /* 819 * Check if the directory has its sticky bit set. If so, ask 820 * for clearance since only the owner of a file or directory 821 * can remove/rename from taht directory. 822 */ 823 mode = udf_getaccessmode(dir_node); 824 if ((mode & S_ISTXT) != 0) { 825 udf_getownership(dir_node, &d_uid, &d_gid); 826 error = kauth_authorize_vnode(cnp->cn_cred, 827 KAUTH_VNODE_DELETE, res_node->vnode, 828 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 829 d_uid, d_uid)); 830 if (error) { 831 error = EPERM; 832 vput(res_node->vnode); 833 goto out; 834 } 835 } 836 } 837 838 *vpp = res_node->vnode; 839 840 done: 841 /* 842 * Store result in the cache if requested. If we are creating a file, 843 * the file might not be found and thus putting it into the namecache 844 * might be seen as negative caching. 845 */ 846 if (nameiop != CREATE) 847 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 848 cnp->cn_flags); 849 850 out: 851 if (error == 0 && *vpp != dvp) 852 VOP_UNLOCK(*vpp); 853 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 854 855 return error; 856 } 857 858 /* --------------------------------------------------------------------- */ 859 860 int 861 udf_getattr(void *v) 862 { 863 struct vop_getattr_args /* { 864 struct vnode *a_vp; 865 struct vattr *a_vap; 866 kauth_cred_t a_cred; 867 struct lwp *a_l; 868 } */ *ap = v; 869 struct vnode *vp = ap->a_vp; 870 struct udf_node *udf_node = VTOI(vp); 871 struct udf_mount *ump = udf_node->ump; 872 struct file_entry *fe = udf_node->fe; 873 struct extfile_entry *efe = udf_node->efe; 874 struct filetimes_extattr_entry *ft_extattr; 875 struct device_extattr_entry *devattr; 876 struct vattr *vap = ap->a_vap; 877 struct timestamp *atime, *mtime, *attrtime, *creatime; 878 uint64_t filesize, blkssize; 879 uint32_t nlink; 880 uint32_t offset, a_l; 881 uint8_t *filedata, *targetbuf; 882 uid_t uid; 883 gid_t gid; 884 int length, error; 885 886 DPRINTF(CALL, ("udf_getattr called\n")); 887 888 /* update times before we returning values */ 889 udf_itimes(udf_node, NULL, NULL, NULL); 890 891 /* get descriptor information */ 892 if (fe) { 893 nlink = udf_rw16(fe->link_cnt); 894 uid = (uid_t)udf_rw32(fe->uid); 895 gid = (gid_t)udf_rw32(fe->gid); 896 filesize = udf_rw64(fe->inf_len); 897 blkssize = udf_rw64(fe->logblks_rec); 898 atime = &fe->atime; 899 mtime = &fe->mtime; 900 attrtime = &fe->attrtime; 901 filedata = fe->data; 902 903 /* initial guess */ 904 creatime = mtime; 905 906 /* check our extended attribute if present */ 907 error = udf_extattr_search_intern(udf_node, 908 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 909 if (!error) { 910 ft_extattr = (struct filetimes_extattr_entry *) 911 (filedata + offset); 912 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 913 creatime = &ft_extattr->times[0]; 914 } 915 } else { 916 assert(udf_node->efe); 917 nlink = udf_rw16(efe->link_cnt); 918 uid = (uid_t)udf_rw32(efe->uid); 919 gid = (gid_t)udf_rw32(efe->gid); 920 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 921 blkssize = udf_rw64(efe->logblks_rec); 922 atime = &efe->atime; 923 mtime = &efe->mtime; 924 attrtime = &efe->attrtime; 925 creatime = &efe->ctime; 926 filedata = efe->data; 927 } 928 929 /* do the uid/gid translation game */ 930 if (uid == (uid_t) -1) 931 uid = ump->mount_args.anon_uid; 932 if (gid == (gid_t) -1) 933 gid = ump->mount_args.anon_gid; 934 935 /* fill in struct vattr with values from the node */ 936 vattr_null(vap); 937 vap->va_type = vp->v_type; 938 vap->va_mode = udf_getaccessmode(udf_node); 939 vap->va_nlink = nlink; 940 vap->va_uid = uid; 941 vap->va_gid = gid; 942 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 943 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 944 vap->va_size = filesize; 945 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 946 947 /* 948 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 949 * 1 to the link count if its a directory we're requested attributes 950 * of. 951 */ 952 if (vap->va_type == VDIR) 953 vap->va_nlink++; 954 955 /* 956 * BUG-ALERT: Posix requires the va_size to be pathlength for symbolic 957 * links. 958 */ 959 if (vap->va_type == VLNK) { 960 /* claim temporary buffers for translation */ 961 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 962 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 963 if (!error) { 964 vap->va_size = length; 965 KASSERT(length == strlen(targetbuf)); 966 } 967 free(targetbuf, M_UDFTEMP); 968 /* XXX return error? */ 969 } 970 971 /* access times */ 972 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 973 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 974 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 975 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 976 977 vap->va_gen = 1; /* no multiple generations yes (!?) */ 978 vap->va_flags = 0; /* no flags */ 979 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 980 vap->va_filerev = 1; /* TODO file revision numbers? */ 981 vap->va_vaflags = 0; 982 /* TODO get vaflags from the extended attributes? */ 983 984 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 985 error = udf_extattr_search_intern(udf_node, 986 UDF_DEVICESPEC_ATTR_NO, "", 987 &offset, &a_l); 988 /* if error, deny access */ 989 if (error || (filedata == NULL)) { 990 vap->va_mode = 0; /* or v_type = VNON? */ 991 } else { 992 devattr = (struct device_extattr_entry *) 993 filedata + offset; 994 vap->va_rdev = makedev( 995 udf_rw32(devattr->major), 996 udf_rw32(devattr->minor) 997 ); 998 /* TODO we could check the implementator */ 999 } 1000 } 1001 1002 return 0; 1003 } 1004 1005 /* --------------------------------------------------------------------- */ 1006 1007 static int 1008 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 1009 kauth_cred_t cred) 1010 { 1011 struct udf_node *udf_node = VTOI(vp); 1012 uid_t uid; 1013 gid_t gid; 1014 int error; 1015 1016 #ifdef notyet 1017 /* TODO get vaflags from the extended attributes? */ 1018 /* Immutable or append-only files cannot be modified, either. */ 1019 if (udf_node->flags & (IMMUTABLE | APPEND)) 1020 return EPERM; 1021 #endif 1022 1023 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1024 return EROFS; 1025 1026 /* retrieve old values */ 1027 udf_getownership(udf_node, &uid, &gid); 1028 1029 /* only one could be specified */ 1030 if (new_uid == VNOVAL) 1031 new_uid = uid; 1032 if (new_gid == VNOVAL) 1033 new_gid = gid; 1034 1035 /* check if we can fit it in an 32 bits */ 1036 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1037 return EINVAL; 1038 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1039 return EINVAL; 1040 1041 /* check permissions */ 1042 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1043 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1044 if (error) 1045 return (error); 1046 1047 /* change the ownership */ 1048 udf_setownership(udf_node, new_uid, new_gid); 1049 1050 /* mark node changed */ 1051 udf_node->i_flags |= IN_CHANGE; 1052 1053 return 0; 1054 } 1055 1056 1057 static int 1058 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1059 { 1060 struct udf_node *udf_node = VTOI(vp); 1061 uid_t uid; 1062 gid_t gid; 1063 int error; 1064 1065 #ifdef notyet 1066 /* TODO get vaflags from the extended attributes? */ 1067 /* Immutable or append-only files cannot be modified, either. */ 1068 if (udf_node->flags & (IMMUTABLE | APPEND)) 1069 return EPERM; 1070 #endif 1071 1072 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1073 return EROFS; 1074 1075 /* retrieve uid/gid values */ 1076 udf_getownership(udf_node, &uid, &gid); 1077 1078 /* check permissions */ 1079 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1080 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1081 if (error) 1082 return (error); 1083 1084 /* change mode */ 1085 udf_setaccessmode(udf_node, mode); 1086 1087 /* mark node changed */ 1088 udf_node->i_flags |= IN_CHANGE; 1089 1090 return 0; 1091 } 1092 1093 1094 /* exported */ 1095 int 1096 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1097 { 1098 struct udf_node *udf_node = VTOI(vp); 1099 int error, extended; 1100 1101 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1102 return EROFS; 1103 1104 /* Decide whether this is a valid operation based on the file type. */ 1105 switch (vp->v_type) { 1106 case VDIR: 1107 return EISDIR; 1108 case VREG: 1109 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1110 return EROFS; 1111 break; 1112 case VBLK: 1113 /* FALLTHROUGH */ 1114 case VCHR: 1115 /* FALLTHROUGH */ 1116 case VFIFO: 1117 /* Allow modifications of special files even if in the file 1118 * system is mounted read-only (we are not modifying the 1119 * files themselves, but the objects they represent). */ 1120 return 0; 1121 default: 1122 /* Anything else is unsupported. */ 1123 return EOPNOTSUPP; 1124 } 1125 1126 #if notyet 1127 /* TODO get vaflags from the extended attributes? */ 1128 /* Immutable or append-only files cannot be modified, either. */ 1129 if (node->flags & (IMMUTABLE | APPEND)) 1130 return EPERM; 1131 #endif 1132 1133 /* resize file to the requested size */ 1134 error = udf_resize_node(udf_node, newsize, &extended); 1135 1136 if (error == 0) { 1137 /* mark change */ 1138 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1139 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1140 udf_node->i_flags |= IN_ACCESS; 1141 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1142 udf_update(vp, NULL, NULL, NULL, 0); 1143 } 1144 1145 return error; 1146 } 1147 1148 1149 static int 1150 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1151 { 1152 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1153 return EROFS; 1154 1155 /* 1156 * XXX we can't do this yet, as its not described in the standard yet 1157 */ 1158 1159 return EOPNOTSUPP; 1160 } 1161 1162 1163 static int 1164 udf_chtimes(struct vnode *vp, 1165 struct timespec *atime, struct timespec *mtime, 1166 struct timespec *birthtime, int setattrflags, 1167 kauth_cred_t cred) 1168 { 1169 struct udf_node *udf_node = VTOI(vp); 1170 uid_t uid; 1171 gid_t gid; 1172 int error; 1173 1174 #ifdef notyet 1175 /* TODO get vaflags from the extended attributes? */ 1176 /* Immutable or append-only files cannot be modified, either. */ 1177 if (udf_node->flags & (IMMUTABLE | APPEND)) 1178 return EPERM; 1179 #endif 1180 1181 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1182 return EROFS; 1183 1184 /* retrieve uid/gid values */ 1185 udf_getownership(udf_node, &uid, &gid); 1186 1187 /* check permissions */ 1188 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1189 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1190 if (error) 1191 return (error); 1192 1193 /* update node flags depending on what times are passed */ 1194 if (atime->tv_sec != VNOVAL) 1195 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1196 udf_node->i_flags |= IN_ACCESS; 1197 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1198 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1199 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1200 udf_node->i_flags |= IN_ACCESS; 1201 } 1202 1203 return udf_update(vp, atime, mtime, birthtime, 0); 1204 } 1205 1206 1207 int 1208 udf_setattr(void *v) 1209 { 1210 struct vop_setattr_args /* { 1211 struct vnode *a_vp; 1212 struct vattr *a_vap; 1213 kauth_cred_t a_cred; 1214 struct lwp *a_l; 1215 } */ *ap = v; 1216 struct vnode *vp = ap->a_vp; 1217 /* struct udf_node *udf_node = VTOI(vp); */ 1218 /* struct udf_mount *ump = udf_node->ump; */ 1219 kauth_cred_t cred = ap->a_cred; 1220 struct vattr *vap = ap->a_vap; 1221 int error; 1222 1223 DPRINTF(CALL, ("udf_setattr called\n")); 1224 1225 /* Abort if any unsettable attribute is given. */ 1226 error = 0; 1227 if (vap->va_type != VNON || 1228 vap->va_nlink != VNOVAL || 1229 vap->va_fsid != VNOVAL || 1230 vap->va_fileid != VNOVAL || 1231 vap->va_blocksize != VNOVAL || 1232 #ifdef notyet 1233 /* checks are debated */ 1234 vap->va_ctime.tv_sec != VNOVAL || 1235 vap->va_ctime.tv_nsec != VNOVAL || 1236 vap->va_birthtime.tv_sec != VNOVAL || 1237 vap->va_birthtime.tv_nsec != VNOVAL || 1238 #endif 1239 vap->va_gen != VNOVAL || 1240 vap->va_rdev != VNOVAL || 1241 vap->va_bytes != VNOVAL) 1242 error = EINVAL; 1243 1244 DPRINTF(ATTR, ("setattr changing:\n")); 1245 if (error == 0 && (vap->va_flags != VNOVAL)) { 1246 DPRINTF(ATTR, ("\tchflags\n")); 1247 error = udf_chflags(vp, vap->va_flags, cred); 1248 } 1249 1250 if (error == 0 && (vap->va_size != VNOVAL)) { 1251 DPRINTF(ATTR, ("\tchsize\n")); 1252 error = udf_chsize(vp, vap->va_size, cred); 1253 } 1254 1255 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1256 DPRINTF(ATTR, ("\tchown\n")); 1257 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1258 } 1259 1260 if (error == 0 && (vap->va_mode != VNOVAL)) { 1261 DPRINTF(ATTR, ("\tchmod\n")); 1262 error = udf_chmod(vp, vap->va_mode, cred); 1263 } 1264 1265 if (error == 0 && 1266 ((vap->va_atime.tv_sec != VNOVAL && 1267 vap->va_atime.tv_nsec != VNOVAL) || 1268 (vap->va_mtime.tv_sec != VNOVAL && 1269 vap->va_mtime.tv_nsec != VNOVAL)) 1270 ) { 1271 DPRINTF(ATTR, ("\tchtimes\n")); 1272 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1273 &vap->va_birthtime, vap->va_vaflags, cred); 1274 } 1275 VN_KNOTE(vp, NOTE_ATTRIB); 1276 1277 return error; 1278 } 1279 1280 /* --------------------------------------------------------------------- */ 1281 1282 /* 1283 * Return POSIX pathconf information for UDF file systems. 1284 */ 1285 int 1286 udf_pathconf(void *v) 1287 { 1288 struct vop_pathconf_args /* { 1289 struct vnode *a_vp; 1290 int a_name; 1291 register_t *a_retval; 1292 } */ *ap = v; 1293 uint32_t bits; 1294 1295 DPRINTF(CALL, ("udf_pathconf called\n")); 1296 1297 switch (ap->a_name) { 1298 case _PC_LINK_MAX: 1299 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1300 return 0; 1301 case _PC_NAME_MAX: 1302 *ap->a_retval = UDF_MAXNAMLEN; 1303 return 0; 1304 case _PC_PATH_MAX: 1305 *ap->a_retval = PATH_MAX; 1306 return 0; 1307 case _PC_PIPE_BUF: 1308 *ap->a_retval = PIPE_BUF; 1309 return 0; 1310 case _PC_CHOWN_RESTRICTED: 1311 *ap->a_retval = 1; 1312 return 0; 1313 case _PC_NO_TRUNC: 1314 *ap->a_retval = 1; 1315 return 0; 1316 case _PC_SYNC_IO: 1317 *ap->a_retval = 0; /* synchronised is off for performance */ 1318 return 0; 1319 case _PC_FILESIZEBITS: 1320 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1321 bits = 64; /* XXX ought to deliver 65 */ 1322 #if 0 1323 if (udf_node) 1324 bits = 64 * vp->v_mount->mnt_dev_bshift; 1325 #endif 1326 *ap->a_retval = bits; 1327 return 0; 1328 } 1329 1330 return EINVAL; 1331 } 1332 1333 1334 /* --------------------------------------------------------------------- */ 1335 1336 int 1337 udf_open(void *v) 1338 { 1339 struct vop_open_args /* { 1340 struct vnode *a_vp; 1341 int a_mode; 1342 kauth_cred_t a_cred; 1343 struct proc *a_p; 1344 } */ *ap = v; 1345 int flags; 1346 1347 DPRINTF(CALL, ("udf_open called\n")); 1348 1349 /* 1350 * Files marked append-only must be opened for appending. 1351 * TODO: get chflags(2) flags from extened attribute. 1352 */ 1353 flags = 0; 1354 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1355 return (EPERM); 1356 1357 return 0; 1358 } 1359 1360 1361 /* --------------------------------------------------------------------- */ 1362 1363 int 1364 udf_close(void *v) 1365 { 1366 struct vop_close_args /* { 1367 struct vnode *a_vp; 1368 int a_fflag; 1369 kauth_cred_t a_cred; 1370 struct proc *a_p; 1371 } */ *ap = v; 1372 struct vnode *vp = ap->a_vp; 1373 struct udf_node *udf_node = VTOI(vp); 1374 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1375 int error; 1376 1377 DPRINTF(CALL, ("udf_close called\n")); 1378 udf_node = udf_node; /* shut up gcc */ 1379 1380 if (!async && (vp->v_type != VDIR)) { 1381 mutex_enter(vp->v_interlock); 1382 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1383 if (error) 1384 return error; 1385 } 1386 1387 mutex_enter(vp->v_interlock); 1388 if (vp->v_usecount > 1) 1389 udf_itimes(udf_node, NULL, NULL, NULL); 1390 mutex_exit(vp->v_interlock); 1391 1392 return 0; 1393 } 1394 1395 1396 /* --------------------------------------------------------------------- */ 1397 1398 static int 1399 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1400 { 1401 int flags; 1402 1403 /* check if we are allowed to write */ 1404 switch (vap->va_type) { 1405 case VDIR: 1406 case VLNK: 1407 case VREG: 1408 /* 1409 * normal nodes: check if we're on a read-only mounted 1410 * filingsystem and bomb out if we're trying to write. 1411 */ 1412 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1413 return EROFS; 1414 break; 1415 case VBLK: 1416 case VCHR: 1417 case VSOCK: 1418 case VFIFO: 1419 /* 1420 * special nodes: even on read-only mounted filingsystems 1421 * these are allowed to be written to if permissions allow. 1422 */ 1423 break; 1424 default: 1425 /* no idea what this is */ 1426 return EINVAL; 1427 } 1428 1429 /* noone may write immutable files */ 1430 /* TODO: get chflags(2) flags from extened attribute. */ 1431 flags = 0; 1432 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1433 return EPERM; 1434 1435 return 0; 1436 } 1437 1438 static int 1439 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1440 kauth_cred_t cred) 1441 { 1442 /* ask the generic genfs_can_access to advice on security */ 1443 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1444 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1445 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1446 } 1447 1448 int 1449 udf_access(void *v) 1450 { 1451 struct vop_access_args /* { 1452 struct vnode *a_vp; 1453 int a_mode; 1454 kauth_cred_t a_cred; 1455 struct proc *a_p; 1456 } */ *ap = v; 1457 struct vnode *vp = ap->a_vp; 1458 mode_t mode = ap->a_mode; 1459 kauth_cred_t cred = ap->a_cred; 1460 /* struct udf_node *udf_node = VTOI(vp); */ 1461 struct vattr vap; 1462 int error; 1463 1464 DPRINTF(CALL, ("udf_access called\n")); 1465 1466 error = VOP_GETATTR(vp, &vap, NULL); 1467 if (error) 1468 return error; 1469 1470 error = udf_check_possible(vp, &vap, mode); 1471 if (error) 1472 return error; 1473 1474 error = udf_check_permitted(vp, &vap, mode, cred); 1475 1476 return error; 1477 } 1478 1479 /* --------------------------------------------------------------------- */ 1480 1481 int 1482 udf_create(void *v) 1483 { 1484 struct vop_create_v3_args /* { 1485 struct vnode *a_dvp; 1486 struct vnode **a_vpp; 1487 struct componentname *a_cnp; 1488 struct vattr *a_vap; 1489 } */ *ap = v; 1490 struct vnode *dvp = ap->a_dvp; 1491 struct vnode **vpp = ap->a_vpp; 1492 struct vattr *vap = ap->a_vap; 1493 struct componentname *cnp = ap->a_cnp; 1494 int error; 1495 1496 DPRINTF(CALL, ("udf_create called\n")); 1497 error = udf_create_node(dvp, vpp, vap, cnp); 1498 1499 return error; 1500 } 1501 1502 /* --------------------------------------------------------------------- */ 1503 1504 int 1505 udf_mknod(void *v) 1506 { 1507 struct vop_mknod_v3_args /* { 1508 struct vnode *a_dvp; 1509 struct vnode **a_vpp; 1510 struct componentname *a_cnp; 1511 struct vattr *a_vap; 1512 } */ *ap = v; 1513 struct vnode *dvp = ap->a_dvp; 1514 struct vnode **vpp = ap->a_vpp; 1515 struct vattr *vap = ap->a_vap; 1516 struct componentname *cnp = ap->a_cnp; 1517 int error; 1518 1519 DPRINTF(CALL, ("udf_mknod called\n")); 1520 error = udf_create_node(dvp, vpp, vap, cnp); 1521 1522 return error; 1523 } 1524 1525 /* --------------------------------------------------------------------- */ 1526 1527 int 1528 udf_mkdir(void *v) 1529 { 1530 struct vop_mkdir_v3_args /* { 1531 struct vnode *a_dvp; 1532 struct vnode **a_vpp; 1533 struct componentname *a_cnp; 1534 struct vattr *a_vap; 1535 } */ *ap = v; 1536 struct vnode *dvp = ap->a_dvp; 1537 struct vnode **vpp = ap->a_vpp; 1538 struct vattr *vap = ap->a_vap; 1539 struct componentname *cnp = ap->a_cnp; 1540 int error; 1541 1542 DPRINTF(CALL, ("udf_mkdir called\n")); 1543 error = udf_create_node(dvp, vpp, vap, cnp); 1544 1545 return error; 1546 } 1547 1548 /* --------------------------------------------------------------------- */ 1549 1550 static int 1551 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1552 { 1553 struct udf_node *udf_node, *dir_node; 1554 struct vattr vap; 1555 int error; 1556 1557 DPRINTF(CALL, ("udf_link called\n")); 1558 KASSERT(dvp != vp); 1559 KASSERT(vp->v_type != VDIR); 1560 KASSERT(dvp->v_mount == vp->v_mount); 1561 1562 /* get attributes */ 1563 dir_node = VTOI(dvp); 1564 udf_node = VTOI(vp); 1565 1566 error = VOP_GETATTR(vp, &vap, FSCRED); 1567 if (error) { 1568 VOP_UNLOCK(vp); 1569 return error; 1570 } 1571 1572 /* check link count overflow */ 1573 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1574 VOP_UNLOCK(vp); 1575 return EMLINK; 1576 } 1577 1578 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1579 if (error) 1580 VOP_UNLOCK(vp); 1581 return error; 1582 } 1583 1584 int 1585 udf_link(void *v) 1586 { 1587 struct vop_link_v2_args /* { 1588 struct vnode *a_dvp; 1589 struct vnode *a_vp; 1590 struct componentname *a_cnp; 1591 } */ *ap = v; 1592 struct vnode *dvp = ap->a_dvp; 1593 struct vnode *vp = ap->a_vp; 1594 struct componentname *cnp = ap->a_cnp; 1595 int error; 1596 1597 error = udf_do_link(dvp, vp, cnp); 1598 if (error) 1599 VOP_ABORTOP(dvp, cnp); 1600 1601 VN_KNOTE(vp, NOTE_LINK); 1602 VN_KNOTE(dvp, NOTE_WRITE); 1603 1604 return error; 1605 } 1606 1607 /* --------------------------------------------------------------------- */ 1608 1609 static int 1610 udf_do_symlink(struct udf_node *udf_node, char *target) 1611 { 1612 struct pathcomp pathcomp; 1613 uint8_t *pathbuf, *pathpos, *compnamepos; 1614 char *mntonname; 1615 int pathlen, len, compnamelen, mntonnamelen; 1616 int error; 1617 1618 /* process `target' to an UDF structure */ 1619 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1620 pathpos = pathbuf; 1621 pathlen = 0; 1622 1623 if (*target == '/') { 1624 /* symlink starts from the root */ 1625 len = UDF_PATH_COMP_SIZE; 1626 memset(&pathcomp, 0, len); 1627 pathcomp.type = UDF_PATH_COMP_ROOT; 1628 1629 /* check if its mount-point relative! */ 1630 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1631 mntonnamelen = strlen(mntonname); 1632 if (strlen(target) >= mntonnamelen) { 1633 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1634 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1635 target += mntonnamelen; 1636 } 1637 } else { 1638 target++; 1639 } 1640 1641 memcpy(pathpos, &pathcomp, len); 1642 pathpos += len; 1643 pathlen += len; 1644 } 1645 1646 error = 0; 1647 while (*target) { 1648 /* ignore multiple '/' */ 1649 while (*target == '/') { 1650 target++; 1651 } 1652 if (!*target) 1653 break; 1654 1655 /* extract component name */ 1656 compnamelen = 0; 1657 compnamepos = target; 1658 while ((*target) && (*target != '/')) { 1659 target++; 1660 compnamelen++; 1661 } 1662 1663 /* just trunc if too long ?? (security issue) */ 1664 if (compnamelen >= 127) { 1665 error = ENAMETOOLONG; 1666 break; 1667 } 1668 1669 /* convert unix name to UDF name */ 1670 len = sizeof(struct pathcomp); 1671 memset(&pathcomp, 0, len); 1672 pathcomp.type = UDF_PATH_COMP_NAME; 1673 len = UDF_PATH_COMP_SIZE; 1674 1675 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1676 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1677 if ((compnamelen == 1) && (*compnamepos == '.')) 1678 pathcomp.type = UDF_PATH_COMP_CURDIR; 1679 1680 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1681 unix_to_udf_name( 1682 (char *) &pathcomp.ident, &pathcomp.l_ci, 1683 compnamepos, compnamelen, 1684 &udf_node->ump->logical_vol->desc_charset); 1685 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1686 } 1687 1688 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1689 error = ENAMETOOLONG; 1690 break; 1691 } 1692 1693 memcpy(pathpos, &pathcomp, len); 1694 pathpos += len; 1695 pathlen += len; 1696 } 1697 1698 if (error) { 1699 /* aparently too big */ 1700 free(pathbuf, M_UDFTEMP); 1701 return error; 1702 } 1703 1704 error = udf_grow_node(udf_node, pathlen); 1705 if (error) { 1706 /* failed to pregrow node */ 1707 free(pathbuf, M_UDFTEMP); 1708 return error; 1709 } 1710 1711 /* write out structure on the new file */ 1712 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1713 pathbuf, pathlen, 0, 1714 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1715 FSCRED, NULL, NULL); 1716 1717 /* return status of symlink contents writeout */ 1718 free(pathbuf, M_UDFTEMP); 1719 return error; 1720 } 1721 1722 1723 int 1724 udf_symlink(void *v) 1725 { 1726 struct vop_symlink_v3_args /* { 1727 struct vnode *a_dvp; 1728 struct vnode **a_vpp; 1729 struct componentname *a_cnp; 1730 struct vattr *a_vap; 1731 char *a_target; 1732 } */ *ap = v; 1733 struct vnode *dvp = ap->a_dvp; 1734 struct vnode **vpp = ap->a_vpp; 1735 struct vattr *vap = ap->a_vap; 1736 struct componentname *cnp = ap->a_cnp; 1737 struct udf_node *dir_node; 1738 struct udf_node *udf_node; 1739 int error; 1740 1741 DPRINTF(CALL, ("udf_symlink called\n")); 1742 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1743 error = udf_create_node(dvp, vpp, vap, cnp); 1744 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1745 if (!error) { 1746 dir_node = VTOI(dvp); 1747 udf_node = VTOI(*vpp); 1748 KASSERT(udf_node); 1749 error = udf_do_symlink(udf_node, ap->a_target); 1750 if (error) { 1751 /* remove node */ 1752 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1753 vrele(*vpp); 1754 *vpp = NULL; 1755 } 1756 } 1757 return error; 1758 } 1759 1760 /* --------------------------------------------------------------------- */ 1761 1762 static int 1763 udf_do_readlink(struct udf_node *udf_node, uint64_t filesize, 1764 uint8_t *targetbuf, int *length) 1765 { 1766 struct pathcomp pathcomp; 1767 uint8_t *pathbuf, *tmpname; 1768 uint8_t *pathpos, *targetpos; 1769 char *mntonname; 1770 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1771 int first, error; 1772 1773 pathbuf = malloc(UDF_SYMLINKBUFLEN, 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, filesize, 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(tmpname, M_UDFTEMP); 1787 return error; 1788 } 1789 1790 /* convert to a unix path */ 1791 pathpos = pathbuf; 1792 pathlen = 0; 1793 targetpos = targetbuf; 1794 targetlen = PATH_MAX; 1795 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1796 mntonnamelen = strlen(mntonname); 1797 1798 error = 0; 1799 first = 1; 1800 while (filesize - pathlen >= UDF_PATH_COMP_SIZE) { 1801 len = UDF_PATH_COMP_SIZE; 1802 memcpy(&pathcomp, pathpos, len); 1803 l_ci = pathcomp.l_ci; 1804 switch (pathcomp.type) { 1805 case UDF_PATH_COMP_ROOT : 1806 /* XXX should check for l_ci; bugcompatible now */ 1807 if ((targetlen < 1) || !first) { 1808 error = EINVAL; 1809 break; 1810 } 1811 *targetpos++ = '/'; targetlen--; 1812 break; 1813 case UDF_PATH_COMP_MOUNTROOT : 1814 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1815 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1816 error = EINVAL; 1817 break; 1818 } 1819 memcpy(targetpos, mntonname, mntonnamelen); 1820 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1821 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1822 /* more follows, so must be directory */ 1823 *targetpos++ = '/'; targetlen--; 1824 } 1825 break; 1826 case UDF_PATH_COMP_PARENTDIR : 1827 /* XXX should check for l_ci; bugcompatible now */ 1828 if (targetlen < 3) { 1829 error = EINVAL; 1830 break; 1831 } 1832 *targetpos++ = '.'; targetlen--; 1833 *targetpos++ = '.'; targetlen--; 1834 *targetpos++ = '/'; targetlen--; 1835 break; 1836 case UDF_PATH_COMP_CURDIR : 1837 /* XXX should check for l_ci; bugcompatible now */ 1838 if (targetlen < 2) { 1839 error = EINVAL; 1840 break; 1841 } 1842 *targetpos++ = '.'; targetlen--; 1843 *targetpos++ = '/'; targetlen--; 1844 break; 1845 case UDF_PATH_COMP_NAME : 1846 if (l_ci == 0) { 1847 error = EINVAL; 1848 break; 1849 } 1850 memset(tmpname, 0, PATH_MAX); 1851 memcpy(&pathcomp, pathpos, len + l_ci); 1852 udf_to_unix_name(tmpname, MAXPATHLEN, 1853 pathcomp.ident, l_ci, 1854 &udf_node->ump->logical_vol->desc_charset); 1855 namelen = strlen(tmpname); 1856 if (targetlen < namelen + 1) { 1857 error = EINVAL; 1858 break; 1859 } 1860 memcpy(targetpos, tmpname, namelen); 1861 targetpos += namelen; targetlen -= namelen; 1862 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1863 /* more follows, so must be directory */ 1864 *targetpos++ = '/'; targetlen--; 1865 } 1866 break; 1867 default : 1868 error = EINVAL; 1869 break; 1870 } 1871 first = 0; 1872 if (error) 1873 break; 1874 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1875 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1876 1877 } 1878 /* all processed? */ 1879 if (filesize - pathlen > 0) 1880 error = EINVAL; 1881 1882 free(pathbuf, M_UDFTEMP); 1883 free(tmpname, M_UDFTEMP); 1884 1885 *length = PATH_MAX - targetlen; 1886 return error; 1887 } 1888 1889 1890 int 1891 udf_readlink(void *v) 1892 { 1893 struct vop_readlink_args /* { 1894 struct vnode *a_vp; 1895 struct uio *a_uio; 1896 kauth_cred_t a_cred; 1897 } */ *ap = v; 1898 struct vnode *vp = ap->a_vp; 1899 struct udf_node *udf_node = VTOI(vp); 1900 struct file_entry *fe = udf_node->fe; 1901 struct extfile_entry *efe = udf_node->efe; 1902 struct uio *uio = ap->a_uio; 1903 uint64_t filesize; 1904 uint8_t *targetbuf; 1905 int length; 1906 int error; 1907 1908 DPRINTF(CALL, ("udf_readlink called\n")); 1909 1910 if (fe) { 1911 filesize = udf_rw64(fe->inf_len); 1912 } else { 1913 assert(udf_node->efe); 1914 filesize = udf_rw64(efe->inf_len); 1915 } 1916 1917 /* claim temporary buffers for translation */ 1918 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1919 1920 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 1921 1922 /* uiomove() to destination */ 1923 if (!error) 1924 uiomove(targetbuf, length, uio); 1925 1926 free(targetbuf, M_UDFTEMP); 1927 return error; 1928 } 1929 1930 /* --------------------------------------------------------------------- */ 1931 1932 /* 1933 * udf_rename() moved to udf_rename.c 1934 */ 1935 1936 /* --------------------------------------------------------------------- */ 1937 1938 int 1939 udf_remove(void *v) 1940 { 1941 struct vop_remove_v2_args /* { 1942 struct vnode *a_dvp; 1943 struct vnode *a_vp; 1944 struct componentname *a_cnp; 1945 } */ *ap = v; 1946 struct vnode *dvp = ap->a_dvp; 1947 struct vnode *vp = ap->a_vp; 1948 struct componentname *cnp = ap->a_cnp; 1949 struct udf_node *dir_node = VTOI(dvp); 1950 struct udf_node *udf_node = VTOI(vp); 1951 struct udf_mount *ump = dir_node->ump; 1952 int error; 1953 1954 DPRINTF(CALL, ("udf_remove called\n")); 1955 if (vp->v_type != VDIR) { 1956 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1957 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1958 } else { 1959 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1960 error = EPERM; 1961 } 1962 1963 if (error == 0) { 1964 VN_KNOTE(vp, NOTE_DELETE); 1965 VN_KNOTE(dvp, NOTE_WRITE); 1966 } 1967 1968 if (dvp == vp) 1969 vrele(vp); 1970 else 1971 vput(vp); 1972 1973 return error; 1974 } 1975 1976 /* --------------------------------------------------------------------- */ 1977 1978 int 1979 udf_rmdir(void *v) 1980 { 1981 struct vop_rmdir_v2_args /* { 1982 struct vnode *a_dvp; 1983 struct vnode *a_vp; 1984 struct componentname *a_cnp; 1985 } */ *ap = v; 1986 struct vnode *vp = ap->a_vp; 1987 struct vnode *dvp = ap->a_dvp; 1988 struct componentname *cnp = ap->a_cnp; 1989 struct udf_node *dir_node = VTOI(dvp); 1990 struct udf_node *udf_node = VTOI(vp); 1991 struct udf_mount *ump = dir_node->ump; 1992 int error, isempty; 1993 1994 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1995 1996 /* don't allow '.' to be deleted */ 1997 if (dir_node == udf_node) { 1998 vrele(vp); 1999 return EINVAL; 2000 } 2001 2002 /* make sure our `leaf' node's hash is populated */ 2003 dirhash_get(&udf_node->dir_hash); 2004 error = udf_dirhash_fill(udf_node); 2005 if (error) { 2006 dirhash_put(udf_node->dir_hash); 2007 return error; 2008 } 2009 2010 /* check to see if the directory is empty */ 2011 isempty = dirhash_dir_isempty(udf_node->dir_hash); 2012 dirhash_put(udf_node->dir_hash); 2013 2014 if (!isempty) { 2015 vput(vp); 2016 return ENOTEMPTY; 2017 } 2018 2019 /* detach the node from the directory, udf_node is an empty dir here */ 2020 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2021 if (error == 0) { 2022 cache_purge(vp); 2023 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2024 /* 2025 * Bug alert: we need to remove '..' from the detaching 2026 * udf_node so further lookups of this are not possible. This 2027 * prevents a process in a deleted directory from going to its 2028 * deleted parent. Since `udf_node' is garanteed to be empty 2029 * here, trunc it so no fids are there. 2030 */ 2031 dirhash_purge(&udf_node->dir_hash); 2032 udf_shrink_node(udf_node, 0); 2033 VN_KNOTE(vp, NOTE_DELETE); 2034 } 2035 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 2036 2037 /* put the node and exit */ 2038 vput(vp); 2039 2040 return error; 2041 } 2042 2043 /* --------------------------------------------------------------------- */ 2044 2045 int 2046 udf_fsync(void *v) 2047 { 2048 struct vop_fsync_args /* { 2049 struct vnode *a_vp; 2050 kauth_cred_t a_cred; 2051 int a_flags; 2052 off_t offlo; 2053 off_t offhi; 2054 struct proc *a_p; 2055 } */ *ap = v; 2056 struct vnode *vp = ap->a_vp; 2057 struct udf_node *udf_node = VTOI(vp); 2058 int error, flags, wait; 2059 2060 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2061 udf_node, 2062 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2063 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2064 2065 /* flush data and wait for it when requested */ 2066 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2067 error = vflushbuf(vp, ap->a_flags); 2068 if (error) 2069 return error; 2070 2071 if (udf_node == NULL) { 2072 printf("udf_fsync() called on NULL udf_node!\n"); 2073 return 0; 2074 } 2075 if (vp->v_tag != VT_UDF) { 2076 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2077 return 0; 2078 } 2079 2080 /* set our times */ 2081 udf_itimes(udf_node, NULL, NULL, NULL); 2082 2083 /* if called when mounted readonly, never write back */ 2084 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2085 return 0; 2086 2087 /* if only data is requested, return */ 2088 if (ap->a_flags & FSYNC_DATAONLY) 2089 return 0; 2090 2091 /* check if the node is dirty 'enough'*/ 2092 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2093 if (flags == 0) 2094 return 0; 2095 2096 /* if we don't have to wait, check for IO pending */ 2097 if (!wait) { 2098 if (vp->v_numoutput > 0) { 2099 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2100 return 0; 2101 } 2102 if (udf_node->outstanding_bufs > 0) { 2103 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2104 return 0; 2105 } 2106 if (udf_node->outstanding_nodedscr > 0) { 2107 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2108 return 0; 2109 } 2110 } 2111 2112 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2113 if (wait) { 2114 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2115 mutex_enter(vp->v_interlock); 2116 while (vp->v_numoutput) { 2117 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2118 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2119 } 2120 mutex_exit(vp->v_interlock); 2121 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2122 } 2123 2124 /* write out node and wait for it if requested */ 2125 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2126 error = udf_writeout_node(udf_node, wait); 2127 if (error) 2128 return error; 2129 2130 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2131 2132 return 0; 2133 } 2134 2135 /* --------------------------------------------------------------------- */ 2136 2137 int 2138 udf_advlock(void *v) 2139 { 2140 struct vop_advlock_args /* { 2141 struct vnode *a_vp; 2142 void *a_id; 2143 int a_op; 2144 struct flock *a_fl; 2145 int a_flags; 2146 } */ *ap = v; 2147 struct vnode *vp = ap->a_vp; 2148 struct udf_node *udf_node = VTOI(vp); 2149 struct file_entry *fe; 2150 struct extfile_entry *efe; 2151 uint64_t file_size; 2152 2153 DPRINTF(LOCKING, ("udf_advlock called\n")); 2154 2155 /* get directory filesize */ 2156 if (udf_node->fe) { 2157 fe = udf_node->fe; 2158 file_size = udf_rw64(fe->inf_len); 2159 } else { 2160 assert(udf_node->efe); 2161 efe = udf_node->efe; 2162 file_size = udf_rw64(efe->inf_len); 2163 } 2164 2165 return lf_advlock(ap, &udf_node->lockf, file_size); 2166 } 2167 2168 /* --------------------------------------------------------------------- */ 2169 2170 /* Global vfs vnode data structures for udfs */ 2171 int (**udf_vnodeop_p)(void *); 2172 2173 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2174 { &vop_default_desc, vn_default_error }, 2175 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2176 { &vop_create_desc, udf_create }, /* create */ 2177 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2178 { &vop_open_desc, udf_open }, /* open */ 2179 { &vop_close_desc, udf_close }, /* close */ 2180 { &vop_access_desc, udf_access }, /* access */ 2181 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2182 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2183 { &vop_read_desc, udf_read }, /* read */ 2184 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2185 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 2186 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 2187 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2188 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2189 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2190 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2191 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2192 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2193 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2194 { &vop_seek_desc, genfs_seek }, /* seek */ 2195 { &vop_remove_desc, udf_remove }, /* remove */ 2196 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2197 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2198 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2199 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2200 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2201 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2202 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2203 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2204 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2205 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2206 { &vop_lock_desc, genfs_lock }, /* lock */ 2207 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2208 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2209 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2210 /* { &vop_print_desc, udf_print }, */ /* print */ 2211 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2212 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2213 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2214 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2215 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2216 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2217 { NULL, NULL } 2218 }; 2219 2220 2221 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2222 &udf_vnodeop_p, udf_vnodeop_entries 2223 }; 2224
Indexes created Mon Sep 22 13:09:51 GMT 2025