udf_vnops.c revision 1.105
1 /* $NetBSD: udf_vnops.c,v 1.105 2017/05/26 14:21:01 riastradh 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 1.105 2017/05/26 14:21:01 riastradh 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 /* externs */ 75 extern int prtactive; 76 77 /* implementations of vnode functions; table follows at end */ 78 /* --------------------------------------------------------------------- */ 79 80 int 81 udf_inactive(void *v) 82 { 83 struct vop_inactive_v2_args /* { 84 struct vnode *a_vp; 85 bool *a_recycle; 86 } */ *ap = v; 87 struct vnode *vp = ap->a_vp; 88 struct udf_node *udf_node = VTOI(vp); 89 int refcnt; 90 91 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 92 93 if (udf_node == NULL) { 94 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 95 return 0; 96 } 97 98 /* 99 * Optionally flush metadata to disc. 100 */ 101 if (udf_node->fe) { 102 refcnt = udf_rw16(udf_node->fe->link_cnt); 103 } else { 104 assert(udf_node->efe); 105 refcnt = udf_rw16(udf_node->efe->link_cnt); 106 } 107 108 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 109 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 110 /* system nodes are not writen out on inactive, so flush */ 111 udf_node->i_flags = 0; 112 } 113 114 *ap->a_recycle = false; 115 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 116 *ap->a_recycle = true; 117 return 0; 118 } 119 120 /* write out its node */ 121 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 122 udf_update(vp, NULL, NULL, NULL, 0); 123 124 return 0; 125 } 126 127 /* --------------------------------------------------------------------- */ 128 129 int 130 udf_reclaim(void *v) 131 { 132 struct vop_reclaim_v2_args /* { 133 struct vnode *a_vp; 134 } */ *ap = v; 135 struct vnode *vp = ap->a_vp; 136 struct udf_node *udf_node = VTOI(vp); 137 int refcnt; 138 139 VOP_UNLOCK(vp); 140 141 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 142 if (prtactive && vp->v_usecount > 1) 143 vprint("udf_reclaim(): pushing active", vp); 144 145 if (udf_node == NULL) { 146 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 147 return 0; 148 } 149 150 /* 151 * If the file has not been referenced anymore in a directory 152 * we ought to free up the resources on disc if applicable. 153 */ 154 if (udf_node->fe) { 155 refcnt = udf_rw16(udf_node->fe->link_cnt); 156 } else { 157 assert(udf_node->efe); 158 refcnt = udf_rw16(udf_node->efe->link_cnt); 159 } 160 161 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 162 /* remove this file's allocation */ 163 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 164 udf_delete_node(udf_node); 165 } 166 167 /* update note for closure */ 168 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 169 170 /* async check to see if all node descriptors are written out */ 171 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 172 vprint("udf_reclaim(): waiting for writeout\n", vp); 173 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 174 } 175 176 /* dispose all node knowledge */ 177 udf_dispose_node(udf_node); 178 179 return 0; 180 } 181 182 /* --------------------------------------------------------------------- */ 183 184 int 185 udf_read(void *v) 186 { 187 struct vop_read_args /* { 188 struct vnode *a_vp; 189 struct uio *a_uio; 190 int a_ioflag; 191 kauth_cred_t a_cred; 192 } */ *ap = v; 193 struct vnode *vp = ap->a_vp; 194 struct uio *uio = ap->a_uio; 195 int ioflag = ap->a_ioflag; 196 int advice = IO_ADV_DECODE(ap->a_ioflag); 197 struct uvm_object *uobj; 198 struct udf_node *udf_node = VTOI(vp); 199 struct file_entry *fe; 200 struct extfile_entry *efe; 201 uint64_t file_size; 202 vsize_t len; 203 int error; 204 205 /* 206 * XXX reading from extended attributes not yet implemented. FreeBSD 207 * has it in mind to forward the IO_EXT read call to the 208 * VOP_READEXTATTR(). 209 */ 210 211 DPRINTF(READ, ("udf_read called\n")); 212 213 /* can this happen? some filingsystems have this check */ 214 if (uio->uio_offset < 0) 215 return EINVAL; 216 if (uio->uio_resid == 0) 217 return 0; 218 219 /* protect against rogue programs reading raw directories and links */ 220 if ((ioflag & IO_ALTSEMANTICS) == 0) { 221 if (vp->v_type == VDIR) 222 return EISDIR; 223 /* all but regular files just give EINVAL */ 224 if (vp->v_type != VREG) 225 return EINVAL; 226 } 227 228 assert(udf_node); 229 assert(udf_node->fe || udf_node->efe); 230 231 /* get file/directory filesize */ 232 if (udf_node->fe) { 233 fe = udf_node->fe; 234 file_size = udf_rw64(fe->inf_len); 235 } else { 236 assert(udf_node->efe); 237 efe = udf_node->efe; 238 file_size = udf_rw64(efe->inf_len); 239 } 240 241 /* read contents using buffercache */ 242 uobj = &vp->v_uobj; 243 error = 0; 244 while (uio->uio_resid > 0) { 245 /* reached end? */ 246 if (file_size <= uio->uio_offset) 247 break; 248 249 /* maximise length to file extremity */ 250 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 251 if (len == 0) 252 break; 253 254 /* ubc, here we come, prepare to trap */ 255 error = ubc_uiomove(uobj, uio, len, advice, 256 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 257 if (error) 258 break; 259 } 260 261 /* note access time unless not requested */ 262 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 263 udf_node->i_flags |= IN_ACCESS; 264 if ((ioflag & IO_SYNC) == IO_SYNC) { 265 int uerror; 266 267 uerror = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 268 if (error == 0) 269 error = uerror; 270 } 271 } 272 273 return error; 274 } 275 276 /* --------------------------------------------------------------------- */ 277 278 int 279 udf_write(void *v) 280 { 281 struct vop_write_args /* { 282 struct vnode *a_vp; 283 struct uio *a_uio; 284 int a_ioflag; 285 kauth_cred_t a_cred; 286 } */ *ap = v; 287 struct vnode *vp = ap->a_vp; 288 struct uio *uio = ap->a_uio; 289 int ioflag = ap->a_ioflag; 290 kauth_cred_t cred = ap->a_cred; 291 int advice = IO_ADV_DECODE(ap->a_ioflag); 292 struct uvm_object *uobj; 293 struct udf_node *udf_node = VTOI(vp); 294 struct file_entry *fe; 295 struct extfile_entry *efe; 296 uint64_t file_size, old_size, old_offset; 297 vsize_t len; 298 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 299 int error; 300 int resid, extended; 301 302 /* 303 * XXX writing to extended attributes not yet implemented. FreeBSD has 304 * it in mind to forward the IO_EXT read call to the 305 * VOP_READEXTATTR(). 306 */ 307 308 DPRINTF(WRITE, ("udf_write called\n")); 309 310 /* can this happen? some filingsystems have this check */ 311 if (uio->uio_offset < 0) 312 return EINVAL; 313 if (uio->uio_resid == 0) 314 return 0; 315 316 /* protect against rogue programs writing raw directories or links */ 317 if ((ioflag & IO_ALTSEMANTICS) == 0) { 318 if (vp->v_type == VDIR) 319 return EISDIR; 320 /* all but regular files just give EINVAL for now */ 321 if (vp->v_type != VREG) 322 return EINVAL; 323 } 324 325 assert(udf_node); 326 assert(udf_node->fe || udf_node->efe); 327 328 /* get file/directory filesize */ 329 if (udf_node->fe) { 330 fe = udf_node->fe; 331 file_size = udf_rw64(fe->inf_len); 332 } else { 333 assert(udf_node->efe); 334 efe = udf_node->efe; 335 file_size = udf_rw64(efe->inf_len); 336 } 337 old_size = file_size; 338 339 /* if explicitly asked to append, uio_offset can be wrong? */ 340 if (ioflag & IO_APPEND) 341 uio->uio_offset = file_size; 342 343 extended = (uio->uio_offset + uio->uio_resid > file_size); 344 if (extended) { 345 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 346 file_size, uio->uio_offset + uio->uio_resid)); 347 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 348 if (error) 349 return error; 350 file_size = uio->uio_offset + uio->uio_resid; 351 } 352 353 /* write contents using buffercache */ 354 uobj = &vp->v_uobj; 355 resid = uio->uio_resid; 356 error = 0; 357 358 uvm_vnp_setwritesize(vp, file_size); 359 old_offset = uio->uio_offset; 360 while (uio->uio_resid > 0) { 361 /* maximise length to file extremity */ 362 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 363 if (len == 0) 364 break; 365 366 genfs_node_wrlock(vp); 367 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 368 genfs_node_unlock(vp); 369 if (error) 370 break; 371 372 /* ubc, here we come, prepare to trap */ 373 error = ubc_uiomove(uobj, uio, len, advice, 374 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 375 if (error) 376 break; 377 378 /* 379 * flush what we just wrote if necessary. 380 * XXXUBC simplistic async flushing. 381 * 382 * Directories are excluded since its file data that we want 383 * to purge. 384 */ 385 if ((vp->v_type != VDIR) && 386 (old_offset >> 16 != uio->uio_offset >> 16)) { 387 mutex_enter(vp->v_interlock); 388 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 389 (uio->uio_offset >> 16) << 16, 390 PGO_CLEANIT | PGO_LAZY); 391 old_offset = uio->uio_offset; 392 } 393 } 394 uvm_vnp_setsize(vp, file_size); 395 396 /* mark node changed and request update */ 397 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 398 if (vp->v_mount->mnt_flag & MNT_RELATIME) 399 udf_node->i_flags |= IN_ACCESS; 400 401 /* 402 * XXX TODO FFS has code here to reset setuid & setgid when we're not 403 * the superuser as a precaution against tampering. 404 */ 405 406 /* if we wrote a thing, note write action on vnode */ 407 if (resid > uio->uio_resid) 408 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 409 410 if (error) { 411 /* bring back file size to its former size */ 412 /* take notice of its errors? */ 413 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 414 415 /* roll back uio */ 416 uio->uio_offset -= resid - uio->uio_resid; 417 uio->uio_resid = resid; 418 } else { 419 /* if we write and we're synchronous, update node */ 420 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 421 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 422 } 423 424 return error; 425 } 426 427 428 /* --------------------------------------------------------------------- */ 429 430 /* 431 * `Special' bmap functionality that translates all incomming requests to 432 * translate to vop_strategy() calls with the same blocknumbers effectively 433 * not translating at all. 434 */ 435 436 int 437 udf_trivial_bmap(void *v) 438 { 439 struct vop_bmap_args /* { 440 struct vnode *a_vp; 441 daddr_t a_bn; 442 struct vnode **a_vpp; 443 daddr_t *a_bnp; 444 int *a_runp; 445 } */ *ap = v; 446 struct vnode *vp = ap->a_vp; /* our node */ 447 struct vnode **vpp = ap->a_vpp; /* return node */ 448 daddr_t *bnp = ap->a_bnp; /* translated */ 449 daddr_t bn = ap->a_bn; /* origional */ 450 int *runp = ap->a_runp; 451 struct udf_node *udf_node = VTOI(vp); 452 uint32_t lb_size; 453 454 /* get logical block size */ 455 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 456 457 /* could return `-1' to indicate holes/zeros */ 458 /* translate 1:1 */ 459 *bnp = bn; 460 461 /* set the vnode to read the data from with strategy on itself */ 462 if (vpp) 463 *vpp = vp; 464 465 /* set runlength of maximum block size */ 466 if (runp) 467 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 468 469 /* return success */ 470 return 0; 471 } 472 473 /* --------------------------------------------------------------------- */ 474 475 int 476 udf_vfsstrategy(void *v) 477 { 478 struct vop_strategy_args /* { 479 struct vnode *a_vp; 480 struct buf *a_bp; 481 } */ *ap = v; 482 struct vnode *vp = ap->a_vp; 483 struct buf *bp = ap->a_bp; 484 struct udf_node *udf_node = VTOI(vp); 485 uint32_t lb_size, sectors; 486 487 DPRINTF(STRATEGY, ("udf_strategy called\n")); 488 489 /* check if we ought to be here */ 490 if (vp->v_type == VBLK || vp->v_type == VCHR) 491 panic("udf_strategy: spec"); 492 493 /* only filebuffers ought to be read/write by this, no descriptors */ 494 assert(bp->b_blkno >= 0); 495 496 /* get sector size */ 497 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 498 499 /* calculate length to fetch/store in sectors */ 500 sectors = bp->b_bcount / lb_size; 501 assert(bp->b_bcount > 0); 502 503 /* NEVER assume later that this buffer is already translated */ 504 /* bp->b_lblkno = bp->b_blkno; */ 505 506 /* check assertions: we OUGHT to always get multiples of this */ 507 assert(sectors * lb_size == bp->b_bcount); 508 __USE(sectors); 509 510 /* issue buffer */ 511 if (bp->b_flags & B_READ) { 512 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 513 ", for %d sectors\n", 514 vp, bp, bp->b_blkno, sectors)); 515 516 /* read buffer from the udf_node, translate vtop on the way*/ 517 udf_read_filebuf(udf_node, bp); 518 } else { 519 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 520 ", for %d sectors\n", 521 vp, bp, bp->b_blkno, sectors)); 522 523 /* write buffer to the udf_node, translate vtop on the way*/ 524 udf_write_filebuf(udf_node, bp); 525 } 526 527 return bp->b_error; 528 } 529 530 /* --------------------------------------------------------------------- */ 531 532 int 533 udf_readdir(void *v) 534 { 535 struct vop_readdir_args /* { 536 struct vnode *a_vp; 537 struct uio *a_uio; 538 kauth_cred_t a_cred; 539 int *a_eofflag; 540 off_t **a_cookies; 541 int *a_ncookies; 542 } */ *ap = v; 543 struct uio *uio = ap->a_uio; 544 struct vnode *vp = ap->a_vp; 545 struct udf_node *udf_node = VTOI(vp); 546 struct file_entry *fe; 547 struct extfile_entry *efe; 548 struct fileid_desc *fid; 549 struct dirent *dirent; 550 uint64_t file_size, diroffset, transoffset; 551 uint32_t lb_size; 552 int error; 553 554 DPRINTF(READDIR, ("udf_readdir called\n")); 555 556 /* This operation only makes sense on directory nodes. */ 557 if (vp->v_type != VDIR) 558 return ENOTDIR; 559 560 /* get directory filesize */ 561 if (udf_node->fe) { 562 fe = udf_node->fe; 563 file_size = udf_rw64(fe->inf_len); 564 } else { 565 assert(udf_node->efe); 566 efe = udf_node->efe; 567 file_size = udf_rw64(efe->inf_len); 568 } 569 570 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 571 572 /* 573 * Add `.' pseudo entry if at offset zero since its not in the fid 574 * stream 575 */ 576 if (uio->uio_offset == 0) { 577 DPRINTF(READDIR, ("\t'.' inserted\n")); 578 strcpy(dirent->d_name, "."); 579 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 580 dirent->d_type = DT_DIR; 581 dirent->d_namlen = strlen(dirent->d_name); 582 dirent->d_reclen = _DIRENT_SIZE(dirent); 583 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 584 585 /* mark with magic value that we have done the dummy */ 586 uio->uio_offset = UDF_DIRCOOKIE_DOT; 587 } 588 589 /* we are called just as long as we keep on pushing data in */ 590 error = 0; 591 if (uio->uio_offset < file_size) { 592 /* allocate temporary space for fid */ 593 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 594 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 595 596 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 597 uio->uio_offset = 0; 598 599 diroffset = uio->uio_offset; 600 transoffset = diroffset; 601 while (diroffset < file_size) { 602 DPRINTF(READDIR, ("\tread in fid stream\n")); 603 /* transfer a new fid/dirent */ 604 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 605 DPRINTFIF(READDIR, error, ("read error in read fid " 606 "stream : %d\n", error)); 607 if (error) 608 break; 609 610 /* 611 * If there isn't enough space in the uio to return a 612 * whole dirent, break off read 613 */ 614 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 615 break; 616 617 /* remember the last entry we transfered */ 618 transoffset = diroffset; 619 620 /* skip deleted entries */ 621 if (fid->file_char & UDF_FILE_CHAR_DEL) 622 continue; 623 624 /* skip not visible files */ 625 if (fid->file_char & UDF_FILE_CHAR_VIS) 626 continue; 627 628 /* copy dirent to the caller */ 629 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 630 dirent->d_name, dirent->d_type)); 631 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 632 } 633 634 /* pass on last transfered offset */ 635 uio->uio_offset = transoffset; 636 free(fid, M_UDFTEMP); 637 } 638 639 if (ap->a_eofflag) 640 *ap->a_eofflag = (uio->uio_offset >= file_size); 641 642 #ifdef DEBUG 643 if (udf_verbose & UDF_DEBUG_READDIR) { 644 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 645 if (ap->a_eofflag) 646 printf("returning EOF ? %d\n", *ap->a_eofflag); 647 if (error) 648 printf("readdir returning error %d\n", error); 649 } 650 #endif 651 652 free(dirent, M_UDFTEMP); 653 return error; 654 } 655 656 /* --------------------------------------------------------------------- */ 657 658 int 659 udf_lookup(void *v) 660 { 661 struct vop_lookup_v2_args /* { 662 struct vnode *a_dvp; 663 struct vnode **a_vpp; 664 struct componentname *a_cnp; 665 } */ *ap = v; 666 struct vnode *dvp = ap->a_dvp; 667 struct vnode **vpp = ap->a_vpp; 668 struct componentname *cnp = ap->a_cnp; 669 struct udf_node *dir_node, *res_node; 670 struct udf_mount *ump; 671 struct long_ad icb_loc; 672 mode_t mode; 673 uid_t d_uid; 674 gid_t d_gid; 675 const char *name; 676 int namelen, nameiop, islastcn, mounted_ro; 677 int error, found; 678 679 dir_node = VTOI(dvp); 680 ump = dir_node->ump; 681 *vpp = NULL; 682 683 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 684 cnp->cn_nameptr)); 685 686 /* simplify/clarification flags */ 687 nameiop = cnp->cn_nameiop; 688 islastcn = cnp->cn_flags & ISLASTCN; 689 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 690 691 /* check exec/dirread permissions first */ 692 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 693 if (error) 694 return error; 695 696 DPRINTF(LOOKUP, ("\taccess ok\n")); 697 698 /* 699 * If requesting a modify on the last path element on a read-only 700 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 701 */ 702 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 703 return EROFS; 704 705 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 706 cnp->cn_nameptr)); 707 /* look in the namecache */ 708 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 709 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 710 return *vpp == NULLVP ? ENOENT : 0; 711 } 712 713 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 714 715 /* 716 * Obviously, the file is not (anymore) in the namecache, we have to 717 * search for it. There are three basic cases: '.', '..' and others. 718 * 719 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 720 */ 721 error = 0; 722 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 723 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 724 /* special case 1 '.' */ 725 if (islastcn && cnp->cn_nameiop == RENAME) { 726 error = EISDIR; 727 goto out; 728 } 729 vref(dvp); 730 *vpp = dvp; 731 /* done */ 732 goto done; 733 } else if (cnp->cn_flags & ISDOTDOT) { 734 /* special case 2 '..' */ 735 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 736 737 if (islastcn && cnp->cn_nameiop == RENAME) { 738 error = EINVAL; 739 goto out; 740 } 741 742 /* get our node */ 743 name = ".."; 744 namelen = 2; 745 error = udf_lookup_name_in_dir(dvp, name, namelen, 746 &icb_loc, &found); 747 if (error) 748 goto out; 749 if (!found) 750 error = ENOENT; 751 752 /* first unlock parent */ 753 VOP_UNLOCK(dvp); 754 755 if (error == 0) { 756 DPRINTF(LOOKUP, ("\tfound '..'\n")); 757 /* try to create/reuse the node */ 758 error = udf_get_node(ump, &icb_loc, &res_node); 759 760 if (!error) { 761 DPRINTF(LOOKUP, 762 ("\tnode retrieved/created OK\n")); 763 *vpp = res_node->vnode; 764 } 765 } 766 767 /* try to relock parent */ 768 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 769 goto out; 770 } 771 772 /* all other files */ 773 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 774 775 /* lookup filename in the directory; location icb_loc */ 776 name = cnp->cn_nameptr; 777 namelen = cnp->cn_namelen; 778 error = udf_lookup_name_in_dir(dvp, name, namelen, 779 &icb_loc, &found); 780 if (error) 781 goto out; 782 if (!found) { 783 DPRINTF(LOOKUP, ("\tNOT found\n")); 784 /* 785 * The entry was not found in the directory. This is 786 * valid if we are creating or renaming an entry and 787 * are working on the last component of the path name. 788 */ 789 if (islastcn && (cnp->cn_nameiop == CREATE || 790 cnp->cn_nameiop == RENAME)) { 791 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 792 if (error) { 793 goto out; 794 } 795 error = EJUSTRETURN; 796 } else { 797 error = ENOENT; 798 } 799 /* done */ 800 goto done; 801 } 802 803 /* 804 * XXX NOTE tmpfs has a test here that tests that intermediate 805 * components i.e. not the last one ought to be either a directory or 806 * a link. It seems to function well without this code. 807 */ 808 809 /* try to create/reuse the node */ 810 error = udf_get_node(ump, &icb_loc, &res_node); 811 if (error) 812 goto out; 813 814 /* check permissions */ 815 if (islastcn && (cnp->cn_nameiop == DELETE || 816 cnp->cn_nameiop == RENAME) ) { 817 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 818 if (error) { 819 vput(res_node->vnode); 820 goto out; 821 } 822 823 /* 824 * Check if the directory has its sticky bit set. If so, ask 825 * for clearance since only the owner of a file or directory 826 * can remove/rename from taht directory. 827 */ 828 mode = udf_getaccessmode(dir_node); 829 if ((mode & S_ISTXT) != 0) { 830 udf_getownership(dir_node, &d_uid, &d_gid); 831 error = kauth_authorize_vnode(cnp->cn_cred, 832 KAUTH_VNODE_DELETE, res_node->vnode, 833 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 834 d_uid, d_uid)); 835 if (error) { 836 error = EPERM; 837 vput(res_node->vnode); 838 goto out; 839 } 840 } 841 } 842 843 *vpp = res_node->vnode; 844 845 done: 846 /* 847 * Store result in the cache if requested. If we are creating a file, 848 * the file might not be found and thus putting it into the namecache 849 * might be seen as negative caching. 850 */ 851 if (nameiop != CREATE) 852 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 853 cnp->cn_flags); 854 855 out: 856 if (error == 0 && *vpp != dvp) 857 VOP_UNLOCK(*vpp); 858 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 859 860 return error; 861 } 862 863 /* --------------------------------------------------------------------- */ 864 865 int 866 udf_getattr(void *v) 867 { 868 struct vop_getattr_args /* { 869 struct vnode *a_vp; 870 struct vattr *a_vap; 871 kauth_cred_t a_cred; 872 struct lwp *a_l; 873 } */ *ap = v; 874 struct vnode *vp = ap->a_vp; 875 struct udf_node *udf_node = VTOI(vp); 876 struct udf_mount *ump = udf_node->ump; 877 struct file_entry *fe = udf_node->fe; 878 struct extfile_entry *efe = udf_node->efe; 879 struct filetimes_extattr_entry *ft_extattr; 880 struct device_extattr_entry *devattr; 881 struct vattr *vap = ap->a_vap; 882 struct timestamp *atime, *mtime, *attrtime, *creatime; 883 uint64_t filesize, blkssize; 884 uint32_t nlink; 885 uint32_t offset, a_l; 886 uint8_t *filedata, *targetbuf; 887 uid_t uid; 888 gid_t gid; 889 int length, error; 890 891 DPRINTF(CALL, ("udf_getattr called\n")); 892 893 /* update times before we returning values */ 894 udf_itimes(udf_node, NULL, NULL, NULL); 895 896 /* get descriptor information */ 897 if (fe) { 898 nlink = udf_rw16(fe->link_cnt); 899 uid = (uid_t)udf_rw32(fe->uid); 900 gid = (gid_t)udf_rw32(fe->gid); 901 filesize = udf_rw64(fe->inf_len); 902 blkssize = udf_rw64(fe->logblks_rec); 903 atime = &fe->atime; 904 mtime = &fe->mtime; 905 attrtime = &fe->attrtime; 906 filedata = fe->data; 907 908 /* initial guess */ 909 creatime = mtime; 910 911 /* check our extended attribute if present */ 912 error = udf_extattr_search_intern(udf_node, 913 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 914 if (!error) { 915 ft_extattr = (struct filetimes_extattr_entry *) 916 (filedata + offset); 917 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 918 creatime = &ft_extattr->times[0]; 919 } 920 } else { 921 assert(udf_node->efe); 922 nlink = udf_rw16(efe->link_cnt); 923 uid = (uid_t)udf_rw32(efe->uid); 924 gid = (gid_t)udf_rw32(efe->gid); 925 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 926 blkssize = udf_rw64(efe->logblks_rec); 927 atime = &efe->atime; 928 mtime = &efe->mtime; 929 attrtime = &efe->attrtime; 930 creatime = &efe->ctime; 931 filedata = efe->data; 932 } 933 934 /* do the uid/gid translation game */ 935 if (uid == (uid_t) -1) 936 uid = ump->mount_args.anon_uid; 937 if (gid == (gid_t) -1) 938 gid = ump->mount_args.anon_gid; 939 940 /* fill in struct vattr with values from the node */ 941 vattr_null(vap); 942 vap->va_type = vp->v_type; 943 vap->va_mode = udf_getaccessmode(udf_node); 944 vap->va_nlink = nlink; 945 vap->va_uid = uid; 946 vap->va_gid = gid; 947 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 948 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 949 vap->va_size = filesize; 950 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 951 952 /* 953 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 954 * 1 to the link count if its a directory we're requested attributes 955 * of. 956 */ 957 if (vap->va_type == VDIR) 958 vap->va_nlink++; 959 960 /* 961 * BUG-ALERT: Posix requires the va_size to be pathlength for symbolic 962 * links. 963 */ 964 if (vap->va_type == VLNK) { 965 /* claim temporary buffers for translation */ 966 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 967 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 968 if (!error) { 969 vap->va_size = length; 970 KASSERT(length == strlen(targetbuf)); 971 } 972 free(targetbuf, M_UDFTEMP); 973 /* XXX return error? */ 974 } 975 976 /* access times */ 977 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 978 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 979 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 980 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 981 982 vap->va_gen = 1; /* no multiple generations yes (!?) */ 983 vap->va_flags = 0; /* no flags */ 984 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 985 vap->va_filerev = 1; /* TODO file revision numbers? */ 986 vap->va_vaflags = 0; 987 /* TODO get vaflags from the extended attributes? */ 988 989 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 990 error = udf_extattr_search_intern(udf_node, 991 UDF_DEVICESPEC_ATTR_NO, "", 992 &offset, &a_l); 993 /* if error, deny access */ 994 if (error || (filedata == NULL)) { 995 vap->va_mode = 0; /* or v_type = VNON? */ 996 } else { 997 devattr = (struct device_extattr_entry *) 998 filedata + offset; 999 vap->va_rdev = makedev( 1000 udf_rw32(devattr->major), 1001 udf_rw32(devattr->minor) 1002 ); 1003 /* TODO we could check the implementator */ 1004 } 1005 } 1006 1007 return 0; 1008 } 1009 1010 /* --------------------------------------------------------------------- */ 1011 1012 static int 1013 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 1014 kauth_cred_t cred) 1015 { 1016 struct udf_node *udf_node = VTOI(vp); 1017 uid_t uid; 1018 gid_t gid; 1019 int error; 1020 1021 #ifdef notyet 1022 /* TODO get vaflags from the extended attributes? */ 1023 /* Immutable or append-only files cannot be modified, either. */ 1024 if (udf_node->flags & (IMMUTABLE | APPEND)) 1025 return EPERM; 1026 #endif 1027 1028 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1029 return EROFS; 1030 1031 /* retrieve old values */ 1032 udf_getownership(udf_node, &uid, &gid); 1033 1034 /* only one could be specified */ 1035 if (new_uid == VNOVAL) 1036 new_uid = uid; 1037 if (new_gid == VNOVAL) 1038 new_gid = gid; 1039 1040 /* check if we can fit it in an 32 bits */ 1041 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1042 return EINVAL; 1043 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1044 return EINVAL; 1045 1046 /* check permissions */ 1047 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1048 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1049 if (error) 1050 return (error); 1051 1052 /* change the ownership */ 1053 udf_setownership(udf_node, new_uid, new_gid); 1054 1055 /* mark node changed */ 1056 udf_node->i_flags |= IN_CHANGE; 1057 1058 return 0; 1059 } 1060 1061 1062 static int 1063 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1064 { 1065 struct udf_node *udf_node = VTOI(vp); 1066 uid_t uid; 1067 gid_t gid; 1068 int error; 1069 1070 #ifdef notyet 1071 /* TODO get vaflags from the extended attributes? */ 1072 /* Immutable or append-only files cannot be modified, either. */ 1073 if (udf_node->flags & (IMMUTABLE | APPEND)) 1074 return EPERM; 1075 #endif 1076 1077 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1078 return EROFS; 1079 1080 /* retrieve uid/gid values */ 1081 udf_getownership(udf_node, &uid, &gid); 1082 1083 /* check permissions */ 1084 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1085 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1086 if (error) 1087 return (error); 1088 1089 /* change mode */ 1090 udf_setaccessmode(udf_node, mode); 1091 1092 /* mark node changed */ 1093 udf_node->i_flags |= IN_CHANGE; 1094 1095 return 0; 1096 } 1097 1098 1099 /* exported */ 1100 int 1101 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1102 { 1103 struct udf_node *udf_node = VTOI(vp); 1104 int error, extended; 1105 1106 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1107 return EROFS; 1108 1109 /* Decide whether this is a valid operation based on the file type. */ 1110 switch (vp->v_type) { 1111 case VDIR: 1112 return EISDIR; 1113 case VREG: 1114 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1115 return EROFS; 1116 break; 1117 case VBLK: 1118 /* FALLTHROUGH */ 1119 case VCHR: 1120 /* FALLTHROUGH */ 1121 case VFIFO: 1122 /* Allow modifications of special files even if in the file 1123 * system is mounted read-only (we are not modifying the 1124 * files themselves, but the objects they represent). */ 1125 return 0; 1126 default: 1127 /* Anything else is unsupported. */ 1128 return EOPNOTSUPP; 1129 } 1130 1131 #if notyet 1132 /* TODO get vaflags from the extended attributes? */ 1133 /* Immutable or append-only files cannot be modified, either. */ 1134 if (node->flags & (IMMUTABLE | APPEND)) 1135 return EPERM; 1136 #endif 1137 1138 /* resize file to the requested size */ 1139 error = udf_resize_node(udf_node, newsize, &extended); 1140 1141 if (error == 0) { 1142 /* mark change */ 1143 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1144 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1145 udf_node->i_flags |= IN_ACCESS; 1146 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1147 udf_update(vp, NULL, NULL, NULL, 0); 1148 } 1149 1150 return error; 1151 } 1152 1153 1154 static int 1155 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1156 { 1157 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1158 return EROFS; 1159 1160 /* 1161 * XXX we can't do this yet, as its not described in the standard yet 1162 */ 1163 1164 return EOPNOTSUPP; 1165 } 1166 1167 1168 static int 1169 udf_chtimes(struct vnode *vp, 1170 struct timespec *atime, struct timespec *mtime, 1171 struct timespec *birthtime, int setattrflags, 1172 kauth_cred_t cred) 1173 { 1174 struct udf_node *udf_node = VTOI(vp); 1175 uid_t uid; 1176 gid_t gid; 1177 int error; 1178 1179 #ifdef notyet 1180 /* TODO get vaflags from the extended attributes? */ 1181 /* Immutable or append-only files cannot be modified, either. */ 1182 if (udf_node->flags & (IMMUTABLE | APPEND)) 1183 return EPERM; 1184 #endif 1185 1186 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1187 return EROFS; 1188 1189 /* retrieve uid/gid values */ 1190 udf_getownership(udf_node, &uid, &gid); 1191 1192 /* check permissions */ 1193 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1194 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1195 if (error) 1196 return (error); 1197 1198 /* update node flags depending on what times are passed */ 1199 if (atime->tv_sec != VNOVAL) 1200 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1201 udf_node->i_flags |= IN_ACCESS; 1202 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1203 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1204 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1205 udf_node->i_flags |= IN_ACCESS; 1206 } 1207 1208 return udf_update(vp, atime, mtime, birthtime, 0); 1209 } 1210 1211 1212 int 1213 udf_setattr(void *v) 1214 { 1215 struct vop_setattr_args /* { 1216 struct vnode *a_vp; 1217 struct vattr *a_vap; 1218 kauth_cred_t a_cred; 1219 struct lwp *a_l; 1220 } */ *ap = v; 1221 struct vnode *vp = ap->a_vp; 1222 /* struct udf_node *udf_node = VTOI(vp); */ 1223 /* struct udf_mount *ump = udf_node->ump; */ 1224 kauth_cred_t cred = ap->a_cred; 1225 struct vattr *vap = ap->a_vap; 1226 int error; 1227 1228 DPRINTF(CALL, ("udf_setattr called\n")); 1229 1230 /* Abort if any unsettable attribute is given. */ 1231 error = 0; 1232 if (vap->va_type != VNON || 1233 vap->va_nlink != VNOVAL || 1234 vap->va_fsid != VNOVAL || 1235 vap->va_fileid != VNOVAL || 1236 vap->va_blocksize != VNOVAL || 1237 #ifdef notyet 1238 /* checks are debated */ 1239 vap->va_ctime.tv_sec != VNOVAL || 1240 vap->va_ctime.tv_nsec != VNOVAL || 1241 vap->va_birthtime.tv_sec != VNOVAL || 1242 vap->va_birthtime.tv_nsec != VNOVAL || 1243 #endif 1244 vap->va_gen != VNOVAL || 1245 vap->va_rdev != VNOVAL || 1246 vap->va_bytes != VNOVAL) 1247 error = EINVAL; 1248 1249 DPRINTF(ATTR, ("setattr changing:\n")); 1250 if (error == 0 && (vap->va_flags != VNOVAL)) { 1251 DPRINTF(ATTR, ("\tchflags\n")); 1252 error = udf_chflags(vp, vap->va_flags, cred); 1253 } 1254 1255 if (error == 0 && (vap->va_size != VNOVAL)) { 1256 DPRINTF(ATTR, ("\tchsize\n")); 1257 error = udf_chsize(vp, vap->va_size, cred); 1258 } 1259 1260 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1261 DPRINTF(ATTR, ("\tchown\n")); 1262 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1263 } 1264 1265 if (error == 0 && (vap->va_mode != VNOVAL)) { 1266 DPRINTF(ATTR, ("\tchmod\n")); 1267 error = udf_chmod(vp, vap->va_mode, cred); 1268 } 1269 1270 if (error == 0 && 1271 ((vap->va_atime.tv_sec != VNOVAL && 1272 vap->va_atime.tv_nsec != VNOVAL) || 1273 (vap->va_mtime.tv_sec != VNOVAL && 1274 vap->va_mtime.tv_nsec != VNOVAL)) 1275 ) { 1276 DPRINTF(ATTR, ("\tchtimes\n")); 1277 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1278 &vap->va_birthtime, vap->va_vaflags, cred); 1279 } 1280 VN_KNOTE(vp, NOTE_ATTRIB); 1281 1282 return error; 1283 } 1284 1285 /* --------------------------------------------------------------------- */ 1286 1287 /* 1288 * Return POSIX pathconf information for UDF file systems. 1289 */ 1290 int 1291 udf_pathconf(void *v) 1292 { 1293 struct vop_pathconf_args /* { 1294 struct vnode *a_vp; 1295 int a_name; 1296 register_t *a_retval; 1297 } */ *ap = v; 1298 uint32_t bits; 1299 1300 DPRINTF(CALL, ("udf_pathconf called\n")); 1301 1302 switch (ap->a_name) { 1303 case _PC_LINK_MAX: 1304 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1305 return 0; 1306 case _PC_NAME_MAX: 1307 *ap->a_retval = UDF_MAXNAMLEN; 1308 return 0; 1309 case _PC_PATH_MAX: 1310 *ap->a_retval = PATH_MAX; 1311 return 0; 1312 case _PC_PIPE_BUF: 1313 *ap->a_retval = PIPE_BUF; 1314 return 0; 1315 case _PC_CHOWN_RESTRICTED: 1316 *ap->a_retval = 1; 1317 return 0; 1318 case _PC_NO_TRUNC: 1319 *ap->a_retval = 1; 1320 return 0; 1321 case _PC_SYNC_IO: 1322 *ap->a_retval = 0; /* synchronised is off for performance */ 1323 return 0; 1324 case _PC_FILESIZEBITS: 1325 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1326 bits = 64; /* XXX ought to deliver 65 */ 1327 #if 0 1328 if (udf_node) 1329 bits = 64 * vp->v_mount->mnt_dev_bshift; 1330 #endif 1331 *ap->a_retval = bits; 1332 return 0; 1333 } 1334 1335 return EINVAL; 1336 } 1337 1338 1339 /* --------------------------------------------------------------------- */ 1340 1341 int 1342 udf_open(void *v) 1343 { 1344 struct vop_open_args /* { 1345 struct vnode *a_vp; 1346 int a_mode; 1347 kauth_cred_t a_cred; 1348 struct proc *a_p; 1349 } */ *ap = v; 1350 int flags; 1351 1352 DPRINTF(CALL, ("udf_open called\n")); 1353 1354 /* 1355 * Files marked append-only must be opened for appending. 1356 * TODO: get chflags(2) flags from extened attribute. 1357 */ 1358 flags = 0; 1359 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1360 return (EPERM); 1361 1362 return 0; 1363 } 1364 1365 1366 /* --------------------------------------------------------------------- */ 1367 1368 int 1369 udf_close(void *v) 1370 { 1371 struct vop_close_args /* { 1372 struct vnode *a_vp; 1373 int a_fflag; 1374 kauth_cred_t a_cred; 1375 struct proc *a_p; 1376 } */ *ap = v; 1377 struct vnode *vp = ap->a_vp; 1378 struct udf_node *udf_node = VTOI(vp); 1379 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1380 int error; 1381 1382 DPRINTF(CALL, ("udf_close called\n")); 1383 udf_node = udf_node; /* shut up gcc */ 1384 1385 if (!async && (vp->v_type != VDIR)) { 1386 mutex_enter(vp->v_interlock); 1387 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1388 if (error) 1389 return error; 1390 } 1391 1392 mutex_enter(vp->v_interlock); 1393 if (vp->v_usecount > 1) 1394 udf_itimes(udf_node, NULL, NULL, NULL); 1395 mutex_exit(vp->v_interlock); 1396 1397 return 0; 1398 } 1399 1400 1401 /* --------------------------------------------------------------------- */ 1402 1403 static int 1404 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1405 { 1406 int flags; 1407 1408 /* check if we are allowed to write */ 1409 switch (vap->va_type) { 1410 case VDIR: 1411 case VLNK: 1412 case VREG: 1413 /* 1414 * normal nodes: check if we're on a read-only mounted 1415 * filingsystem and bomb out if we're trying to write. 1416 */ 1417 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1418 return EROFS; 1419 break; 1420 case VBLK: 1421 case VCHR: 1422 case VSOCK: 1423 case VFIFO: 1424 /* 1425 * special nodes: even on read-only mounted filingsystems 1426 * these are allowed to be written to if permissions allow. 1427 */ 1428 break; 1429 default: 1430 /* no idea what this is */ 1431 return EINVAL; 1432 } 1433 1434 /* noone may write immutable files */ 1435 /* TODO: get chflags(2) flags from extened attribute. */ 1436 flags = 0; 1437 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1438 return EPERM; 1439 1440 return 0; 1441 } 1442 1443 static int 1444 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1445 kauth_cred_t cred) 1446 { 1447 /* ask the generic genfs_can_access to advice on security */ 1448 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1449 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1450 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1451 } 1452 1453 int 1454 udf_access(void *v) 1455 { 1456 struct vop_access_args /* { 1457 struct vnode *a_vp; 1458 int a_mode; 1459 kauth_cred_t a_cred; 1460 struct proc *a_p; 1461 } */ *ap = v; 1462 struct vnode *vp = ap->a_vp; 1463 mode_t mode = ap->a_mode; 1464 kauth_cred_t cred = ap->a_cred; 1465 /* struct udf_node *udf_node = VTOI(vp); */ 1466 struct vattr vap; 1467 int error; 1468 1469 DPRINTF(CALL, ("udf_access called\n")); 1470 1471 error = VOP_GETATTR(vp, &vap, NULL); 1472 if (error) 1473 return error; 1474 1475 error = udf_check_possible(vp, &vap, mode); 1476 if (error) 1477 return error; 1478 1479 error = udf_check_permitted(vp, &vap, mode, cred); 1480 1481 return error; 1482 } 1483 1484 /* --------------------------------------------------------------------- */ 1485 1486 int 1487 udf_create(void *v) 1488 { 1489 struct vop_create_v3_args /* { 1490 struct vnode *a_dvp; 1491 struct vnode **a_vpp; 1492 struct componentname *a_cnp; 1493 struct vattr *a_vap; 1494 } */ *ap = v; 1495 struct vnode *dvp = ap->a_dvp; 1496 struct vnode **vpp = ap->a_vpp; 1497 struct vattr *vap = ap->a_vap; 1498 struct componentname *cnp = ap->a_cnp; 1499 int error; 1500 1501 DPRINTF(CALL, ("udf_create called\n")); 1502 error = udf_create_node(dvp, vpp, vap, cnp); 1503 1504 return error; 1505 } 1506 1507 /* --------------------------------------------------------------------- */ 1508 1509 int 1510 udf_mknod(void *v) 1511 { 1512 struct vop_mknod_v3_args /* { 1513 struct vnode *a_dvp; 1514 struct vnode **a_vpp; 1515 struct componentname *a_cnp; 1516 struct vattr *a_vap; 1517 } */ *ap = v; 1518 struct vnode *dvp = ap->a_dvp; 1519 struct vnode **vpp = ap->a_vpp; 1520 struct vattr *vap = ap->a_vap; 1521 struct componentname *cnp = ap->a_cnp; 1522 int error; 1523 1524 DPRINTF(CALL, ("udf_mknod called\n")); 1525 error = udf_create_node(dvp, vpp, vap, cnp); 1526 1527 return error; 1528 } 1529 1530 /* --------------------------------------------------------------------- */ 1531 1532 int 1533 udf_mkdir(void *v) 1534 { 1535 struct vop_mkdir_v3_args /* { 1536 struct vnode *a_dvp; 1537 struct vnode **a_vpp; 1538 struct componentname *a_cnp; 1539 struct vattr *a_vap; 1540 } */ *ap = v; 1541 struct vnode *dvp = ap->a_dvp; 1542 struct vnode **vpp = ap->a_vpp; 1543 struct vattr *vap = ap->a_vap; 1544 struct componentname *cnp = ap->a_cnp; 1545 int error; 1546 1547 DPRINTF(CALL, ("udf_mkdir called\n")); 1548 error = udf_create_node(dvp, vpp, vap, cnp); 1549 1550 return error; 1551 } 1552 1553 /* --------------------------------------------------------------------- */ 1554 1555 static int 1556 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1557 { 1558 struct udf_node *udf_node, *dir_node; 1559 struct vattr vap; 1560 int error; 1561 1562 DPRINTF(CALL, ("udf_link called\n")); 1563 KASSERT(dvp != vp); 1564 KASSERT(vp->v_type != VDIR); 1565 KASSERT(dvp->v_mount == vp->v_mount); 1566 1567 /* get attributes */ 1568 dir_node = VTOI(dvp); 1569 udf_node = VTOI(vp); 1570 1571 error = VOP_GETATTR(vp, &vap, FSCRED); 1572 if (error) { 1573 VOP_UNLOCK(vp); 1574 return error; 1575 } 1576 1577 /* check link count overflow */ 1578 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1579 VOP_UNLOCK(vp); 1580 return EMLINK; 1581 } 1582 1583 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1584 if (error) 1585 VOP_UNLOCK(vp); 1586 return error; 1587 } 1588 1589 int 1590 udf_link(void *v) 1591 { 1592 struct vop_link_v2_args /* { 1593 struct vnode *a_dvp; 1594 struct vnode *a_vp; 1595 struct componentname *a_cnp; 1596 } */ *ap = v; 1597 struct vnode *dvp = ap->a_dvp; 1598 struct vnode *vp = ap->a_vp; 1599 struct componentname *cnp = ap->a_cnp; 1600 int error; 1601 1602 error = udf_do_link(dvp, vp, cnp); 1603 if (error) 1604 VOP_ABORTOP(dvp, cnp); 1605 1606 VN_KNOTE(vp, NOTE_LINK); 1607 VN_KNOTE(dvp, NOTE_WRITE); 1608 1609 return error; 1610 } 1611 1612 /* --------------------------------------------------------------------- */ 1613 1614 static int 1615 udf_do_symlink(struct udf_node *udf_node, char *target) 1616 { 1617 struct pathcomp pathcomp; 1618 uint8_t *pathbuf, *pathpos, *compnamepos; 1619 char *mntonname; 1620 int pathlen, len, compnamelen, mntonnamelen; 1621 int error; 1622 1623 /* process `target' to an UDF structure */ 1624 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1625 pathpos = pathbuf; 1626 pathlen = 0; 1627 1628 if (*target == '/') { 1629 /* symlink starts from the root */ 1630 len = UDF_PATH_COMP_SIZE; 1631 memset(&pathcomp, 0, len); 1632 pathcomp.type = UDF_PATH_COMP_ROOT; 1633 1634 /* check if its mount-point relative! */ 1635 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1636 mntonnamelen = strlen(mntonname); 1637 if (strlen(target) >= mntonnamelen) { 1638 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1639 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1640 target += mntonnamelen; 1641 } 1642 } else { 1643 target++; 1644 } 1645 1646 memcpy(pathpos, &pathcomp, len); 1647 pathpos += len; 1648 pathlen += len; 1649 } 1650 1651 error = 0; 1652 while (*target) { 1653 /* ignore multiple '/' */ 1654 while (*target == '/') { 1655 target++; 1656 } 1657 if (!*target) 1658 break; 1659 1660 /* extract component name */ 1661 compnamelen = 0; 1662 compnamepos = target; 1663 while ((*target) && (*target != '/')) { 1664 target++; 1665 compnamelen++; 1666 } 1667 1668 /* just trunc if too long ?? (security issue) */ 1669 if (compnamelen >= 127) { 1670 error = ENAMETOOLONG; 1671 break; 1672 } 1673 1674 /* convert unix name to UDF name */ 1675 len = sizeof(struct pathcomp); 1676 memset(&pathcomp, 0, len); 1677 pathcomp.type = UDF_PATH_COMP_NAME; 1678 len = UDF_PATH_COMP_SIZE; 1679 1680 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1681 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1682 if ((compnamelen == 1) && (*compnamepos == '.')) 1683 pathcomp.type = UDF_PATH_COMP_CURDIR; 1684 1685 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1686 unix_to_udf_name( 1687 (char *) &pathcomp.ident, &pathcomp.l_ci, 1688 compnamepos, compnamelen, 1689 &udf_node->ump->logical_vol->desc_charset); 1690 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1691 } 1692 1693 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1694 error = ENAMETOOLONG; 1695 break; 1696 } 1697 1698 memcpy(pathpos, &pathcomp, len); 1699 pathpos += len; 1700 pathlen += len; 1701 } 1702 1703 if (error) { 1704 /* aparently too big */ 1705 free(pathbuf, M_UDFTEMP); 1706 return error; 1707 } 1708 1709 error = udf_grow_node(udf_node, pathlen); 1710 if (error) { 1711 /* failed to pregrow node */ 1712 free(pathbuf, M_UDFTEMP); 1713 return error; 1714 } 1715 1716 /* write out structure on the new file */ 1717 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1718 pathbuf, pathlen, 0, 1719 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1720 FSCRED, NULL, NULL); 1721 1722 /* return status of symlink contents writeout */ 1723 free(pathbuf, M_UDFTEMP); 1724 return error; 1725 } 1726 1727 1728 int 1729 udf_symlink(void *v) 1730 { 1731 struct vop_symlink_v3_args /* { 1732 struct vnode *a_dvp; 1733 struct vnode **a_vpp; 1734 struct componentname *a_cnp; 1735 struct vattr *a_vap; 1736 char *a_target; 1737 } */ *ap = v; 1738 struct vnode *dvp = ap->a_dvp; 1739 struct vnode **vpp = ap->a_vpp; 1740 struct vattr *vap = ap->a_vap; 1741 struct componentname *cnp = ap->a_cnp; 1742 struct udf_node *dir_node; 1743 struct udf_node *udf_node; 1744 int error; 1745 1746 DPRINTF(CALL, ("udf_symlink called\n")); 1747 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1748 error = udf_create_node(dvp, vpp, vap, cnp); 1749 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1750 if (!error) { 1751 dir_node = VTOI(dvp); 1752 udf_node = VTOI(*vpp); 1753 KASSERT(udf_node); 1754 error = udf_do_symlink(udf_node, ap->a_target); 1755 if (error) { 1756 /* remove node */ 1757 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1758 vrele(*vpp); 1759 *vpp = NULL; 1760 } 1761 } 1762 return error; 1763 } 1764 1765 /* --------------------------------------------------------------------- */ 1766 1767 static int 1768 udf_do_readlink(struct udf_node *udf_node, uint64_t filesize, 1769 uint8_t *targetbuf, int *length) 1770 { 1771 struct pathcomp pathcomp; 1772 uint8_t *pathbuf, *tmpname; 1773 uint8_t *pathpos, *targetpos; 1774 char *mntonname; 1775 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1776 int first, error; 1777 1778 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1779 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1780 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1781 memset(targetbuf, 0, PATH_MAX); 1782 1783 /* read contents of file in our temporary buffer */ 1784 error = vn_rdwr(UIO_READ, udf_node->vnode, 1785 pathbuf, filesize, 0, 1786 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1787 FSCRED, NULL, NULL); 1788 if (error) { 1789 /* failed to read in symlink contents */ 1790 free(pathbuf, M_UDFTEMP); 1791 free(tmpname, M_UDFTEMP); 1792 return error; 1793 } 1794 1795 /* convert to a unix path */ 1796 pathpos = pathbuf; 1797 pathlen = 0; 1798 targetpos = targetbuf; 1799 targetlen = PATH_MAX; 1800 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1801 mntonnamelen = strlen(mntonname); 1802 1803 error = 0; 1804 first = 1; 1805 while (filesize - pathlen >= UDF_PATH_COMP_SIZE) { 1806 len = UDF_PATH_COMP_SIZE; 1807 memcpy(&pathcomp, pathpos, len); 1808 l_ci = pathcomp.l_ci; 1809 switch (pathcomp.type) { 1810 case UDF_PATH_COMP_ROOT : 1811 /* XXX should check for l_ci; bugcompatible now */ 1812 if ((targetlen < 1) || !first) { 1813 error = EINVAL; 1814 break; 1815 } 1816 *targetpos++ = '/'; targetlen--; 1817 break; 1818 case UDF_PATH_COMP_MOUNTROOT : 1819 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1820 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1821 error = EINVAL; 1822 break; 1823 } 1824 memcpy(targetpos, mntonname, mntonnamelen); 1825 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1826 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1827 /* more follows, so must be directory */ 1828 *targetpos++ = '/'; targetlen--; 1829 } 1830 break; 1831 case UDF_PATH_COMP_PARENTDIR : 1832 /* XXX should check for l_ci; bugcompatible now */ 1833 if (targetlen < 3) { 1834 error = EINVAL; 1835 break; 1836 } 1837 *targetpos++ = '.'; targetlen--; 1838 *targetpos++ = '.'; targetlen--; 1839 *targetpos++ = '/'; targetlen--; 1840 break; 1841 case UDF_PATH_COMP_CURDIR : 1842 /* XXX should check for l_ci; bugcompatible now */ 1843 if (targetlen < 2) { 1844 error = EINVAL; 1845 break; 1846 } 1847 *targetpos++ = '.'; targetlen--; 1848 *targetpos++ = '/'; targetlen--; 1849 break; 1850 case UDF_PATH_COMP_NAME : 1851 if (l_ci == 0) { 1852 error = EINVAL; 1853 break; 1854 } 1855 memset(tmpname, 0, PATH_MAX); 1856 memcpy(&pathcomp, pathpos, len + l_ci); 1857 udf_to_unix_name(tmpname, MAXPATHLEN, 1858 pathcomp.ident, l_ci, 1859 &udf_node->ump->logical_vol->desc_charset); 1860 namelen = strlen(tmpname); 1861 if (targetlen < namelen + 1) { 1862 error = EINVAL; 1863 break; 1864 } 1865 memcpy(targetpos, tmpname, namelen); 1866 targetpos += namelen; targetlen -= namelen; 1867 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1868 /* more follows, so must be directory */ 1869 *targetpos++ = '/'; targetlen--; 1870 } 1871 break; 1872 default : 1873 error = EINVAL; 1874 break; 1875 } 1876 first = 0; 1877 if (error) 1878 break; 1879 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1880 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1881 1882 } 1883 /* all processed? */ 1884 if (filesize - pathlen > 0) 1885 error = EINVAL; 1886 1887 free(pathbuf, M_UDFTEMP); 1888 free(tmpname, M_UDFTEMP); 1889 1890 *length = PATH_MAX - targetlen; 1891 return error; 1892 } 1893 1894 1895 int 1896 udf_readlink(void *v) 1897 { 1898 struct vop_readlink_args /* { 1899 struct vnode *a_vp; 1900 struct uio *a_uio; 1901 kauth_cred_t a_cred; 1902 } */ *ap = v; 1903 struct vnode *vp = ap->a_vp; 1904 struct udf_node *udf_node = VTOI(vp); 1905 struct file_entry *fe = udf_node->fe; 1906 struct extfile_entry *efe = udf_node->efe; 1907 struct uio *uio = ap->a_uio; 1908 uint64_t filesize; 1909 uint8_t *targetbuf; 1910 int length; 1911 int error; 1912 1913 DPRINTF(CALL, ("udf_readlink called\n")); 1914 1915 if (fe) { 1916 filesize = udf_rw64(fe->inf_len); 1917 } else { 1918 assert(udf_node->efe); 1919 filesize = udf_rw64(efe->inf_len); 1920 } 1921 1922 /* claim temporary buffers for translation */ 1923 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1924 1925 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 1926 1927 /* uiomove() to destination */ 1928 if (!error) 1929 uiomove(targetbuf, length, uio); 1930 1931 free(targetbuf, M_UDFTEMP); 1932 return error; 1933 } 1934 1935 /* --------------------------------------------------------------------- */ 1936 1937 /* 1938 * udf_rename() moved to udf_rename.c 1939 */ 1940 1941 /* --------------------------------------------------------------------- */ 1942 1943 int 1944 udf_remove(void *v) 1945 { 1946 struct vop_remove_v2_args /* { 1947 struct vnode *a_dvp; 1948 struct vnode *a_vp; 1949 struct componentname *a_cnp; 1950 } */ *ap = v; 1951 struct vnode *dvp = ap->a_dvp; 1952 struct vnode *vp = ap->a_vp; 1953 struct componentname *cnp = ap->a_cnp; 1954 struct udf_node *dir_node = VTOI(dvp); 1955 struct udf_node *udf_node = VTOI(vp); 1956 struct udf_mount *ump = dir_node->ump; 1957 int error; 1958 1959 DPRINTF(CALL, ("udf_remove called\n")); 1960 if (vp->v_type != VDIR) { 1961 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1962 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1963 } else { 1964 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1965 error = EPERM; 1966 } 1967 1968 if (error == 0) { 1969 VN_KNOTE(vp, NOTE_DELETE); 1970 VN_KNOTE(dvp, NOTE_WRITE); 1971 } 1972 1973 if (dvp == vp) 1974 vrele(vp); 1975 else 1976 vput(vp); 1977 1978 return error; 1979 } 1980 1981 /* --------------------------------------------------------------------- */ 1982 1983 int 1984 udf_rmdir(void *v) 1985 { 1986 struct vop_rmdir_v2_args /* { 1987 struct vnode *a_dvp; 1988 struct vnode *a_vp; 1989 struct componentname *a_cnp; 1990 } */ *ap = v; 1991 struct vnode *vp = ap->a_vp; 1992 struct vnode *dvp = ap->a_dvp; 1993 struct componentname *cnp = ap->a_cnp; 1994 struct udf_node *dir_node = VTOI(dvp); 1995 struct udf_node *udf_node = VTOI(vp); 1996 struct udf_mount *ump = dir_node->ump; 1997 int error, isempty; 1998 1999 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 2000 2001 /* don't allow '.' to be deleted */ 2002 if (dir_node == udf_node) { 2003 vrele(vp); 2004 return EINVAL; 2005 } 2006 2007 /* make sure our `leaf' node's hash is populated */ 2008 dirhash_get(&udf_node->dir_hash); 2009 error = udf_dirhash_fill(udf_node); 2010 if (error) { 2011 dirhash_put(udf_node->dir_hash); 2012 return error; 2013 } 2014 2015 /* check to see if the directory is empty */ 2016 isempty = dirhash_dir_isempty(udf_node->dir_hash); 2017 dirhash_put(udf_node->dir_hash); 2018 2019 if (!isempty) { 2020 vput(vp); 2021 return ENOTEMPTY; 2022 } 2023 2024 /* detach the node from the directory, udf_node is an empty dir here */ 2025 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2026 if (error == 0) { 2027 cache_purge(vp); 2028 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2029 /* 2030 * Bug alert: we need to remove '..' from the detaching 2031 * udf_node so further lookups of this are not possible. This 2032 * prevents a process in a deleted directory from going to its 2033 * deleted parent. Since `udf_node' is garanteed to be empty 2034 * here, trunc it so no fids are there. 2035 */ 2036 dirhash_purge(&udf_node->dir_hash); 2037 udf_shrink_node(udf_node, 0); 2038 VN_KNOTE(vp, NOTE_DELETE); 2039 } 2040 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 2041 2042 /* put the node and exit */ 2043 vput(vp); 2044 2045 return error; 2046 } 2047 2048 /* --------------------------------------------------------------------- */ 2049 2050 int 2051 udf_fsync(void *v) 2052 { 2053 struct vop_fsync_args /* { 2054 struct vnode *a_vp; 2055 kauth_cred_t a_cred; 2056 int a_flags; 2057 off_t offlo; 2058 off_t offhi; 2059 struct proc *a_p; 2060 } */ *ap = v; 2061 struct vnode *vp = ap->a_vp; 2062 struct udf_node *udf_node = VTOI(vp); 2063 int error, flags, wait; 2064 2065 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2066 udf_node, 2067 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2068 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2069 2070 /* flush data and wait for it when requested */ 2071 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2072 error = vflushbuf(vp, ap->a_flags); 2073 if (error) 2074 return error; 2075 2076 if (udf_node == NULL) { 2077 printf("udf_fsync() called on NULL udf_node!\n"); 2078 return 0; 2079 } 2080 if (vp->v_tag != VT_UDF) { 2081 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2082 return 0; 2083 } 2084 2085 /* set our times */ 2086 udf_itimes(udf_node, NULL, NULL, NULL); 2087 2088 /* if called when mounted readonly, never write back */ 2089 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2090 return 0; 2091 2092 /* if only data is requested, return */ 2093 if (ap->a_flags & FSYNC_DATAONLY) 2094 return 0; 2095 2096 /* check if the node is dirty 'enough'*/ 2097 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2098 if (flags == 0) 2099 return 0; 2100 2101 /* if we don't have to wait, check for IO pending */ 2102 if (!wait) { 2103 if (vp->v_numoutput > 0) { 2104 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2105 return 0; 2106 } 2107 if (udf_node->outstanding_bufs > 0) { 2108 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2109 return 0; 2110 } 2111 if (udf_node->outstanding_nodedscr > 0) { 2112 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2113 return 0; 2114 } 2115 } 2116 2117 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2118 if (wait) { 2119 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2120 mutex_enter(vp->v_interlock); 2121 while (vp->v_numoutput) { 2122 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2123 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2124 } 2125 mutex_exit(vp->v_interlock); 2126 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2127 } 2128 2129 /* write out node and wait for it if requested */ 2130 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2131 error = udf_writeout_node(udf_node, wait); 2132 if (error) 2133 return error; 2134 2135 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2136 2137 return 0; 2138 } 2139 2140 /* --------------------------------------------------------------------- */ 2141 2142 int 2143 udf_advlock(void *v) 2144 { 2145 struct vop_advlock_args /* { 2146 struct vnode *a_vp; 2147 void *a_id; 2148 int a_op; 2149 struct flock *a_fl; 2150 int a_flags; 2151 } */ *ap = v; 2152 struct vnode *vp = ap->a_vp; 2153 struct udf_node *udf_node = VTOI(vp); 2154 struct file_entry *fe; 2155 struct extfile_entry *efe; 2156 uint64_t file_size; 2157 2158 DPRINTF(LOCKING, ("udf_advlock called\n")); 2159 2160 /* get directory filesize */ 2161 if (udf_node->fe) { 2162 fe = udf_node->fe; 2163 file_size = udf_rw64(fe->inf_len); 2164 } else { 2165 assert(udf_node->efe); 2166 efe = udf_node->efe; 2167 file_size = udf_rw64(efe->inf_len); 2168 } 2169 2170 return lf_advlock(ap, &udf_node->lockf, file_size); 2171 } 2172 2173 /* --------------------------------------------------------------------- */ 2174 2175 /* Global vfs vnode data structures for udfs */ 2176 int (**udf_vnodeop_p)(void *); 2177 2178 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2179 { &vop_default_desc, vn_default_error }, 2180 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2181 { &vop_create_desc, udf_create }, /* create */ 2182 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2183 { &vop_open_desc, udf_open }, /* open */ 2184 { &vop_close_desc, udf_close }, /* close */ 2185 { &vop_access_desc, udf_access }, /* access */ 2186 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2187 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2188 { &vop_read_desc, udf_read }, /* read */ 2189 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2190 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 2191 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 2192 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2193 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2194 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2195 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2196 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2197 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2198 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2199 { &vop_seek_desc, genfs_seek }, /* seek */ 2200 { &vop_remove_desc, udf_remove }, /* remove */ 2201 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2202 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2203 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2204 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2205 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2206 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2207 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2208 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2209 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2210 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2211 { &vop_lock_desc, genfs_lock }, /* lock */ 2212 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2213 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2214 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2215 /* { &vop_print_desc, udf_print }, */ /* print */ 2216 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2217 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2218 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2219 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2220 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2221 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2222 { NULL, NULL } 2223 }; 2224 2225 2226 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2227 &udf_vnodeop_p, udf_vnodeop_entries 2228 }; 2229
Indexes created Thu Oct 02 14:10:14 GMT 2025