udf_vnops.c revision 1.30.4.7
1 /* $NetBSD: udf_vnops.c,v 1.30.4.7 2009/07/09 19:44:34 snj 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 1.30.4.7 2009/07/09 19:44:34 snj 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 "udf.h" 62 #include "udf_subr.h" 63 #include "udf_bswap.h" 64 65 66 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data) 67 68 69 /* externs */ 70 extern int prtactive; 71 72 /* implementations of vnode functions; table follows at end */ 73 /* --------------------------------------------------------------------- */ 74 75 int 76 udf_inactive(void *v) 77 { 78 struct vop_inactive_args /* { 79 struct vnode *a_vp; 80 bool *a_recycle; 81 } */ *ap = v; 82 struct vnode *vp = ap->a_vp; 83 struct udf_node *udf_node = VTOI(vp); 84 int refcnt; 85 86 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 87 88 if (udf_node == NULL) { 89 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 90 VOP_UNLOCK(vp, 0); 91 return 0; 92 } 93 94 /* 95 * Optionally flush metadata to disc. If the file has not been 96 * referenced anymore in a directory we ought to free up the resources 97 * on disc if applicable. 98 */ 99 if (udf_node->fe) { 100 refcnt = udf_rw16(udf_node->fe->link_cnt); 101 } else { 102 assert(udf_node->efe); 103 refcnt = udf_rw16(udf_node->efe->link_cnt); 104 } 105 106 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) 107 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 108 109 *ap->a_recycle = false; 110 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 111 /* remove this file's allocation */ 112 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 113 *ap->a_recycle = true; 114 udf_delete_node(udf_node); 115 VOP_UNLOCK(vp, 0); 116 vrecycle(vp, NULL, curlwp); 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 VOP_UNLOCK(vp, 0); 124 125 return 0; 126 } 127 128 /* --------------------------------------------------------------------- */ 129 130 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 131 132 int 133 udf_reclaim(void *v) 134 { 135 struct vop_reclaim_args /* { 136 struct vnode *a_vp; 137 } */ *ap = v; 138 struct vnode *vp = ap->a_vp; 139 struct udf_node *udf_node = VTOI(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 /* update note for closure */ 151 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 152 153 /* async check to see if all node descriptors are written out */ 154 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 155 vprint("udf_reclaim(): waiting for writeout\n", vp); 156 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 157 } 158 159 /* purge old data from namei */ 160 cache_purge(vp); 161 162 /* dispose all node knowledge */ 163 udf_dispose_node(udf_node); 164 165 return 0; 166 } 167 168 /* --------------------------------------------------------------------- */ 169 170 int 171 udf_read(void *v) 172 { 173 struct vop_read_args /* { 174 struct vnode *a_vp; 175 struct uio *a_uio; 176 int a_ioflag; 177 kauth_cred_t a_cred; 178 } */ *ap = v; 179 struct vnode *vp = ap->a_vp; 180 struct uio *uio = ap->a_uio; 181 int ioflag = ap->a_ioflag; 182 int advice = IO_ADV_DECODE(ap->a_ioflag); 183 struct uvm_object *uobj; 184 struct udf_node *udf_node = VTOI(vp); 185 struct file_entry *fe; 186 struct extfile_entry *efe; 187 uint64_t file_size; 188 vsize_t len; 189 void *win; 190 int error; 191 int flags; 192 193 /* 194 * XXX reading from extended attributes not yet implemented. FreeBSD 195 * has it in mind to forward the IO_EXT read call to the 196 * VOP_READEXTATTR(). 197 */ 198 199 DPRINTF(READ, ("udf_read called\n")); 200 201 /* can this happen? some filingsystems have this check */ 202 if (uio->uio_offset < 0) 203 return EINVAL; 204 if (uio->uio_resid == 0) 205 return 0; 206 207 /* protect against rogue programs reading raw directories and links */ 208 if ((ioflag & IO_ALTSEMANTICS) == 0) { 209 if (vp->v_type == VDIR) 210 return EISDIR; 211 /* all but regular files just give EINVAL */ 212 if (vp->v_type != VREG) 213 return EINVAL; 214 } 215 216 assert(udf_node); 217 assert(udf_node->fe || udf_node->efe); 218 219 /* get file/directory filesize */ 220 if (udf_node->fe) { 221 fe = udf_node->fe; 222 file_size = udf_rw64(fe->inf_len); 223 } else { 224 assert(udf_node->efe); 225 efe = udf_node->efe; 226 file_size = udf_rw64(efe->inf_len); 227 } 228 229 /* read contents using buffercache */ 230 uobj = &vp->v_uobj; 231 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 232 error = 0; 233 while (uio->uio_resid > 0) { 234 /* reached end? */ 235 if (file_size <= uio->uio_offset) 236 break; 237 238 /* maximise length to file extremity */ 239 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 240 if (len == 0) 241 break; 242 243 /* ubc, here we come, prepare to trap */ 244 win = ubc_alloc(uobj, uio->uio_offset, &len, 245 advice, UBC_READ); 246 error = uiomove(win, len, uio); 247 ubc_release(win, flags); 248 if (error) 249 break; 250 } 251 252 /* note access time unless not requested */ 253 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 254 udf_node->i_flags |= IN_ACCESS; 255 if ((ioflag & IO_SYNC) == IO_SYNC) 256 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 257 } 258 259 return error; 260 } 261 262 /* --------------------------------------------------------------------- */ 263 264 int 265 udf_write(void *v) 266 { 267 struct vop_write_args /* { 268 struct vnode *a_vp; 269 struct uio *a_uio; 270 int a_ioflag; 271 kauth_cred_t a_cred; 272 } */ *ap = v; 273 struct vnode *vp = ap->a_vp; 274 struct uio *uio = ap->a_uio; 275 int ioflag = ap->a_ioflag; 276 kauth_cred_t cred = ap->a_cred; 277 int advice = IO_ADV_DECODE(ap->a_ioflag); 278 struct uvm_object *uobj; 279 struct udf_node *udf_node = VTOI(vp); 280 struct file_entry *fe; 281 struct extfile_entry *efe; 282 void *win; 283 uint64_t file_size, old_size, old_offset; 284 vsize_t len; 285 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 286 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 287 int error; 288 int flags, resid, extended; 289 290 /* 291 * XXX writing to extended attributes not yet implemented. FreeBSD has 292 * it in mind to forward the IO_EXT read call to the 293 * VOP_READEXTATTR(). 294 */ 295 296 DPRINTF(WRITE, ("udf_write called\n")); 297 298 /* can this happen? some filingsystems have this check */ 299 if (uio->uio_offset < 0) 300 return EINVAL; 301 if (uio->uio_resid == 0) 302 return 0; 303 304 /* protect against rogue programs writing raw directories or links */ 305 if ((ioflag & IO_ALTSEMANTICS) == 0) { 306 if (vp->v_type == VDIR) 307 return EISDIR; 308 /* all but regular files just give EINVAL for now */ 309 if (vp->v_type != VREG) 310 return EINVAL; 311 } 312 313 assert(udf_node); 314 assert(udf_node->fe || udf_node->efe); 315 316 /* get file/directory filesize */ 317 if (udf_node->fe) { 318 fe = udf_node->fe; 319 file_size = udf_rw64(fe->inf_len); 320 } else { 321 assert(udf_node->efe); 322 efe = udf_node->efe; 323 file_size = udf_rw64(efe->inf_len); 324 } 325 old_size = file_size; 326 327 /* if explicitly asked to append, uio_offset can be wrong? */ 328 if (ioflag & IO_APPEND) 329 uio->uio_offset = file_size; 330 331 extended = (uio->uio_offset + uio->uio_resid > file_size); 332 if (extended) { 333 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 334 file_size, uio->uio_offset + uio->uio_resid)); 335 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 336 if (error) 337 return error; 338 file_size = uio->uio_offset + uio->uio_resid; 339 } 340 341 /* write contents using buffercache */ 342 uobj = &vp->v_uobj; 343 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 344 resid = uio->uio_resid; 345 error = 0; 346 347 uvm_vnp_setwritesize(vp, file_size); 348 old_offset = uio->uio_offset; 349 while (uio->uio_resid > 0) { 350 /* maximise length to file extremity */ 351 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 352 if (len == 0) 353 break; 354 355 /* ubc, here we come, prepare to trap */ 356 win = ubc_alloc(uobj, uio->uio_offset, &len, 357 advice, UBC_WRITE); 358 genfs_node_wrlock(vp); 359 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 360 genfs_node_unlock(vp); 361 362 if (!error) 363 error = uiomove(win, len, uio); 364 ubc_release(win, flags); 365 if (error) 366 break; 367 368 /* 369 * flush what we just wrote if necessary. 370 * XXXUBC simplistic async flushing. 371 * 372 * this one works on page sizes. Directories are excluded 373 * since its file data that we want to purge. 374 */ 375 if (!async && (vp->v_type != VDIR) && 376 (uio->uio_offset - old_offset >= PAGE_SIZE)) { 377 mutex_enter(&vp->v_interlock); 378 error = VOP_PUTPAGES(vp, 379 ptoa(atop(old_offset)), 380 ptoa(atop(uio->uio_offset + PAGE_SIZE-1)), 381 PGO_CLEANIT); 382 old_offset = uio->uio_offset; 383 } 384 } 385 uvm_vnp_setsize(vp, file_size); 386 387 /* mark node changed and request update */ 388 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 389 390 /* 391 * XXX TODO FFS has code here to reset setuid & setgid when we're not 392 * the superuser as a precaution against tampering. 393 */ 394 395 /* if we wrote a thing, note write action on vnode */ 396 if (resid > uio->uio_resid) 397 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 398 399 if (error) { 400 /* bring back file size to its former size */ 401 /* take notice of its errors? */ 402 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 403 404 /* roll back uio */ 405 uio->uio_offset -= resid - uio->uio_resid; 406 uio->uio_resid = resid; 407 } else { 408 /* if we write and we're synchronous, update node */ 409 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 410 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 411 } 412 413 return error; 414 } 415 416 417 /* --------------------------------------------------------------------- */ 418 419 /* 420 * `Special' bmap functionality that translates all incomming requests to 421 * translate to vop_strategy() calls with the same blocknumbers effectively 422 * not translating at all. 423 */ 424 425 int 426 udf_trivial_bmap(void *v) 427 { 428 struct vop_bmap_args /* { 429 struct vnode *a_vp; 430 daddr_t a_bn; 431 struct vnode **a_vpp; 432 daddr_t *a_bnp; 433 int *a_runp; 434 } */ *ap = v; 435 struct vnode *vp = ap->a_vp; /* our node */ 436 struct vnode **vpp = ap->a_vpp; /* return node */ 437 daddr_t *bnp = ap->a_bnp; /* translated */ 438 daddr_t bn = ap->a_bn; /* origional */ 439 int *runp = ap->a_runp; 440 struct udf_node *udf_node = VTOI(vp); 441 uint32_t lb_size; 442 443 /* get logical block size */ 444 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 445 446 /* could return `-1' to indicate holes/zeros */ 447 /* translate 1:1 */ 448 *bnp = bn; 449 450 /* set the vnode to read the data from with strategy on itself */ 451 if (vpp) 452 *vpp = vp; 453 454 /* set runlength of maximum block size */ 455 if (runp) 456 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 457 458 /* return success */ 459 return 0; 460 } 461 462 /* --------------------------------------------------------------------- */ 463 464 int 465 udf_vfsstrategy(void *v) 466 { 467 struct vop_strategy_args /* { 468 struct vnode *a_vp; 469 struct buf *a_bp; 470 } */ *ap = v; 471 struct vnode *vp = ap->a_vp; 472 struct buf *bp = ap->a_bp; 473 struct udf_node *udf_node = VTOI(vp); 474 uint32_t lb_size, from, sectors; 475 int error; 476 477 DPRINTF(STRATEGY, ("udf_strategy called\n")); 478 479 /* check if we ought to be here */ 480 if (vp->v_type == VBLK || vp->v_type == VCHR) 481 panic("udf_strategy: spec"); 482 483 /* only filebuffers ought to be read/write by this, no descriptors */ 484 assert(bp->b_blkno >= 0); 485 486 /* get sector size */ 487 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 488 489 /* calculate sector to start from */ 490 from = bp->b_blkno; 491 492 /* calculate length to fetch/store in sectors */ 493 sectors = bp->b_bcount / lb_size; 494 assert(bp->b_bcount > 0); 495 496 /* NEVER assume later that this buffer is already translated */ 497 /* bp->b_lblkno = bp->b_blkno; */ 498 499 /* check assertions: we OUGHT to always get multiples of this */ 500 assert(sectors * lb_size == bp->b_bcount); 501 502 /* issue buffer */ 503 error = 0; 504 if (bp->b_flags & B_READ) { 505 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 506 ", sector %d for %d sectors\n", 507 vp, bp, bp->b_blkno, from, sectors)); 508 509 /* read buffer from the udf_node, translate vtop on the way*/ 510 udf_read_filebuf(udf_node, bp); 511 } else { 512 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 513 ", sector %d for %d sectors\n", 514 vp, bp, bp->b_blkno, from, sectors)); 515 516 /* write buffer to the udf_node, translate vtop on the way*/ 517 udf_write_filebuf(udf_node, bp); 518 } 519 520 return bp->b_error; 521 } 522 523 /* --------------------------------------------------------------------- */ 524 525 int 526 udf_readdir(void *v) 527 { 528 struct vop_readdir_args /* { 529 struct vnode *a_vp; 530 struct uio *a_uio; 531 kauth_cred_t a_cred; 532 int *a_eofflag; 533 off_t **a_cookies; 534 int *a_ncookies; 535 } */ *ap = v; 536 struct uio *uio = ap->a_uio; 537 struct vnode *vp = ap->a_vp; 538 struct udf_node *udf_node = VTOI(vp); 539 struct file_entry *fe; 540 struct extfile_entry *efe; 541 struct fileid_desc *fid; 542 struct dirent *dirent; 543 uint64_t file_size, diroffset, transoffset; 544 uint32_t lb_size; 545 int error; 546 547 DPRINTF(READDIR, ("udf_readdir called\n")); 548 549 /* This operation only makes sense on directory nodes. */ 550 if (vp->v_type != VDIR) 551 return ENOTDIR; 552 553 /* get directory filesize */ 554 if (udf_node->fe) { 555 fe = udf_node->fe; 556 file_size = udf_rw64(fe->inf_len); 557 } else { 558 assert(udf_node->efe); 559 efe = udf_node->efe; 560 file_size = udf_rw64(efe->inf_len); 561 } 562 563 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 564 565 /* 566 * Add `.' pseudo entry if at offset zero since its not in the fid 567 * stream 568 */ 569 if (uio->uio_offset == 0) { 570 DPRINTF(READDIR, ("\t'.' inserted\n")); 571 strcpy(dirent->d_name, "."); 572 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 573 dirent->d_type = DT_DIR; 574 dirent->d_namlen = strlen(dirent->d_name); 575 dirent->d_reclen = _DIRENT_SIZE(dirent); 576 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 577 578 /* mark with magic value that we have done the dummy */ 579 uio->uio_offset = UDF_DIRCOOKIE_DOT; 580 } 581 582 /* we are called just as long as we keep on pushing data in */ 583 error = 0; 584 if (uio->uio_offset < file_size) { 585 /* allocate temporary space for fid */ 586 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 587 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 588 589 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 590 uio->uio_offset = 0; 591 592 diroffset = uio->uio_offset; 593 transoffset = diroffset; 594 while (diroffset < file_size) { 595 DPRINTF(READDIR, ("\tread in fid stream\n")); 596 /* transfer a new fid/dirent */ 597 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 598 DPRINTFIF(READDIR, error, ("read error in read fid " 599 "stream : %d\n", error)); 600 if (error) 601 break; 602 603 /* 604 * If there isn't enough space in the uio to return a 605 * whole dirent, break off read 606 */ 607 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 608 break; 609 610 /* remember the last entry we transfered */ 611 transoffset = diroffset; 612 613 /* skip deleted entries */ 614 if (fid->file_char & UDF_FILE_CHAR_DEL) 615 continue; 616 617 /* skip not visible files */ 618 if (fid->file_char & UDF_FILE_CHAR_VIS) 619 continue; 620 621 /* copy dirent to the caller */ 622 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 623 dirent->d_name, dirent->d_type)); 624 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 625 } 626 627 /* pass on last transfered offset */ 628 uio->uio_offset = transoffset; 629 free(fid, M_UDFTEMP); 630 } 631 632 if (ap->a_eofflag) 633 *ap->a_eofflag = (uio->uio_offset >= file_size); 634 635 #ifdef DEBUG 636 if (udf_verbose & UDF_DEBUG_READDIR) { 637 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 638 if (ap->a_eofflag) 639 printf("returning EOF ? %d\n", *ap->a_eofflag); 640 if (error) 641 printf("readdir returning error %d\n", error); 642 } 643 #endif 644 645 free(dirent, M_UDFTEMP); 646 return error; 647 } 648 649 /* --------------------------------------------------------------------- */ 650 651 int 652 udf_lookup(void *v) 653 { 654 struct vop_lookup_args /* { 655 struct vnode *a_dvp; 656 struct vnode **a_vpp; 657 struct componentname *a_cnp; 658 } */ *ap = v; 659 struct vnode *dvp = ap->a_dvp; 660 struct vnode **vpp = ap->a_vpp; 661 struct componentname *cnp = ap->a_cnp; 662 struct udf_node *dir_node, *res_node; 663 struct udf_mount *ump; 664 struct long_ad icb_loc; 665 const char *name; 666 int namelen, nameiop, islastcn, mounted_ro; 667 int vnodetp; 668 int error, found; 669 670 dir_node = VTOI(dvp); 671 ump = dir_node->ump; 672 *vpp = NULL; 673 674 DPRINTF(LOOKUP, ("udf_lookup called\n")); 675 676 /* simplify/clarification flags */ 677 nameiop = cnp->cn_nameiop; 678 islastcn = cnp->cn_flags & ISLASTCN; 679 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 680 681 /* check exec/dirread permissions first */ 682 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 683 if (error) 684 return error; 685 686 DPRINTF(LOOKUP, ("\taccess ok\n")); 687 688 /* 689 * If requesting a modify on the last path element on a read-only 690 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 691 */ 692 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 693 return EROFS; 694 695 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 696 cnp->cn_nameptr)); 697 /* look in the nami cache; returns 0 on success!! */ 698 error = cache_lookup(dvp, vpp, cnp); 699 if (error >= 0) 700 return error; 701 702 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 703 704 /* 705 * Obviously, the file is not (anymore) in the namecache, we have to 706 * search for it. There are three basic cases: '.', '..' and others. 707 * 708 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 709 */ 710 error = 0; 711 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 712 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 713 /* special case 1 '.' */ 714 VREF(dvp); 715 *vpp = dvp; 716 /* done */ 717 } else if (cnp->cn_flags & ISDOTDOT) { 718 /* special case 2 '..' */ 719 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 720 721 /* get our node */ 722 name = ".."; 723 namelen = 2; 724 error = udf_lookup_name_in_dir(dvp, name, namelen, 725 &icb_loc, &found); 726 if (error) 727 goto out; 728 if (!found) 729 error = ENOENT; 730 731 /* first unlock parent */ 732 VOP_UNLOCK(dvp, 0); 733 734 if (error == 0) { 735 DPRINTF(LOOKUP, ("\tfound '..'\n")); 736 /* try to create/reuse the node */ 737 error = udf_get_node(ump, &icb_loc, &res_node); 738 739 if (!error) { 740 DPRINTF(LOOKUP, 741 ("\tnode retrieved/created OK\n")); 742 *vpp = res_node->vnode; 743 } 744 } 745 746 /* try to relock parent */ 747 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 748 } else { 749 DPRINTF(LOOKUP, ("\tlookup file\n")); 750 /* all other files */ 751 /* lookup filename in the directory; location icb_loc */ 752 name = cnp->cn_nameptr; 753 namelen = cnp->cn_namelen; 754 error = udf_lookup_name_in_dir(dvp, name, namelen, 755 &icb_loc, &found); 756 if (error) 757 goto out; 758 if (!found) { 759 DPRINTF(LOOKUP, ("\tNOT found\n")); 760 /* 761 * UGH, didn't find name. If we're creating or 762 * renaming on the last name this is OK and we ought 763 * to return EJUSTRETURN if its allowed to be created. 764 */ 765 error = ENOENT; 766 if (islastcn && 767 (nameiop == CREATE || nameiop == RENAME)) 768 error = 0; 769 if (!error) { 770 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 771 if (!error) { 772 /* keep the component name */ 773 cnp->cn_flags |= SAVENAME; 774 error = EJUSTRETURN; 775 } 776 } 777 /* done */ 778 } else { 779 /* try to create/reuse the node */ 780 error = udf_get_node(ump, &icb_loc, &res_node); 781 if (!error) { 782 /* 783 * If we are not at the last path component 784 * and found a non-directory or non-link entry 785 * (which may itself be pointing to a 786 * directory), raise an error. 787 */ 788 vnodetp = res_node->vnode->v_type; 789 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 790 if (!islastcn) 791 error = ENOTDIR; 792 } 793 794 } 795 if (!error) { 796 *vpp = res_node->vnode; 797 } 798 } 799 } 800 801 out: 802 /* 803 * Store result in the cache if requested. If we are creating a file, 804 * the file might not be found and thus putting it into the namecache 805 * might be seen as negative caching. 806 */ 807 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 808 cache_enter(dvp, *vpp, cnp); 809 810 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 811 812 return error; 813 } 814 815 /* --------------------------------------------------------------------- */ 816 817 int 818 udf_getattr(void *v) 819 { 820 struct vop_getattr_args /* { 821 struct vnode *a_vp; 822 struct vattr *a_vap; 823 kauth_cred_t a_cred; 824 struct lwp *a_l; 825 } */ *ap = v; 826 struct vnode *vp = ap->a_vp; 827 struct udf_node *udf_node = VTOI(vp); 828 struct udf_mount *ump = udf_node->ump; 829 struct file_entry *fe = udf_node->fe; 830 struct extfile_entry *efe = udf_node->efe; 831 struct filetimes_extattr_entry *ft_extattr; 832 struct device_extattr_entry *devattr; 833 struct vattr *vap = ap->a_vap; 834 struct timestamp *atime, *mtime, *attrtime, *creatime; 835 uint64_t filesize, blkssize; 836 uint32_t nlink; 837 uint32_t offset, a_l; 838 uint8_t *filedata; 839 uid_t uid; 840 gid_t gid; 841 int error; 842 843 DPRINTF(CALL, ("udf_getattr called\n")); 844 845 /* update times before we returning values */ 846 udf_itimes(udf_node, NULL, NULL, NULL); 847 848 /* get descriptor information */ 849 if (fe) { 850 nlink = udf_rw16(fe->link_cnt); 851 uid = (uid_t)udf_rw32(fe->uid); 852 gid = (gid_t)udf_rw32(fe->gid); 853 filesize = udf_rw64(fe->inf_len); 854 blkssize = udf_rw64(fe->logblks_rec); 855 atime = &fe->atime; 856 mtime = &fe->mtime; 857 attrtime = &fe->attrtime; 858 filedata = fe->data; 859 860 /* initial guess */ 861 creatime = mtime; 862 863 /* check our extended attribute if present */ 864 error = udf_extattr_search_intern(udf_node, 865 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 866 if (!error) { 867 ft_extattr = (struct filetimes_extattr_entry *) 868 (filedata + offset); 869 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 870 creatime = &ft_extattr->times[0]; 871 } 872 } else { 873 assert(udf_node->efe); 874 nlink = udf_rw16(efe->link_cnt); 875 uid = (uid_t)udf_rw32(efe->uid); 876 gid = (gid_t)udf_rw32(efe->gid); 877 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 878 blkssize = udf_rw64(efe->logblks_rec); 879 atime = &efe->atime; 880 mtime = &efe->mtime; 881 attrtime = &efe->attrtime; 882 creatime = &efe->ctime; 883 filedata = efe->data; 884 } 885 886 /* do the uid/gid translation game */ 887 if (uid == (uid_t) -1) 888 uid = ump->mount_args.anon_uid; 889 if (gid == (gid_t) -1) 890 gid = ump->mount_args.anon_gid; 891 892 /* fill in struct vattr with values from the node */ 893 VATTR_NULL(vap); 894 vap->va_type = vp->v_type; 895 vap->va_mode = udf_getaccessmode(udf_node); 896 vap->va_nlink = nlink; 897 vap->va_uid = uid; 898 vap->va_gid = gid; 899 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 900 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 901 vap->va_size = filesize; 902 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 903 904 /* 905 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 906 * 1 to the link count if its a directory we're requested attributes 907 * of. 908 */ 909 if (vap->va_type == VDIR) 910 vap->va_nlink++; 911 912 /* access times */ 913 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 914 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 915 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 916 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 917 918 vap->va_gen = 1; /* no multiple generations yes (!?) */ 919 vap->va_flags = 0; /* no flags */ 920 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 921 vap->va_filerev = 1; /* TODO file revision numbers? */ 922 vap->va_vaflags = 0; 923 /* TODO get vaflags from the extended attributes? */ 924 925 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 926 error = udf_extattr_search_intern(udf_node, 927 UDF_DEVICESPEC_ATTR_NO, "", 928 &offset, &a_l); 929 /* if error, deny access */ 930 if (error || (filedata == NULL)) { 931 vap->va_mode = 0; /* or v_type = VNON? */ 932 } else { 933 devattr = (struct device_extattr_entry *) 934 filedata + offset; 935 vap->va_rdev = makedev( 936 udf_rw32(devattr->major), 937 udf_rw32(devattr->minor) 938 ); 939 /* TODO we could check the implementator */ 940 } 941 } 942 943 return 0; 944 } 945 946 /* --------------------------------------------------------------------- */ 947 948 static int 949 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 950 kauth_cred_t cred) 951 { 952 struct udf_node *udf_node = VTOI(vp); 953 uid_t euid, uid; 954 gid_t egid, gid; 955 int issuperuser, ismember; 956 int error; 957 958 #ifdef notyet 959 /* TODO get vaflags from the extended attributes? */ 960 /* Immutable or append-only files cannot be modified, either. */ 961 if (udf_node->flags & (IMMUTABLE | APPEND)) 962 return EPERM; 963 #endif 964 965 if (vp->v_mount->mnt_flag & MNT_RDONLY) 966 return EROFS; 967 968 /* retrieve old values */ 969 udf_getownership(udf_node, &uid, &gid); 970 971 /* only one could be specified */ 972 if (new_uid == VNOVAL) 973 new_uid = uid; 974 if (new_gid == VNOVAL) 975 new_gid = gid; 976 977 /* check if we can fit it in an 32 bits */ 978 if ((uid_t) ((uint32_t) uid) != uid) 979 return EINVAL; 980 if ((gid_t) ((uint32_t) gid) != gid) 981 return EINVAL; 982 983 /* 984 * If we don't own the file, are trying to change the owner of the 985 * file, or are not a member of the target group, the caller's 986 * credentials must imply super-user privilege or the call fails. 987 */ 988 989 /* check permissions */ 990 euid = kauth_cred_geteuid(cred); 991 egid = kauth_cred_getegid(cred); 992 if ((error = kauth_cred_ismember_gid(cred, new_gid, &ismember))) 993 return error; 994 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 995 issuperuser = (error == 0); 996 997 if (!issuperuser) { 998 if ((new_uid != uid) || (euid != uid)) 999 return EPERM; 1000 if ((new_gid != gid) && !(egid == new_gid || ismember)) 1001 return EPERM; 1002 } 1003 1004 /* change the ownership */ 1005 udf_setownership(udf_node, new_uid, new_gid); 1006 1007 /* mark node changed */ 1008 udf_node->i_flags |= IN_CHANGE; 1009 1010 return 0; 1011 } 1012 1013 1014 static int 1015 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1016 { 1017 struct udf_node *udf_node = VTOI(vp); 1018 uid_t euid, uid; 1019 gid_t egid, gid; 1020 int issuperuser, ismember; 1021 int error; 1022 1023 #ifdef notyet 1024 /* TODO get vaflags from the extended attributes? */ 1025 /* Immutable or append-only files cannot be modified, either. */ 1026 if (udf_node->flags & (IMMUTABLE | APPEND)) 1027 return EPERM; 1028 #endif 1029 1030 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1031 return EROFS; 1032 1033 /* retrieve uid/gid values */ 1034 udf_getownership(udf_node, &uid, &gid); 1035 1036 /* check permissions */ 1037 euid = kauth_cred_geteuid(cred); 1038 egid = kauth_cred_getegid(cred); 1039 if ((error = kauth_cred_ismember_gid(cred, gid, &ismember))) 1040 return error; 1041 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1042 issuperuser = (error == 0); 1043 1044 if ((euid != uid) && !issuperuser) 1045 return EPERM; 1046 if (euid != 0) { 1047 if (vp->v_type != VDIR && (mode & S_ISTXT)) 1048 return EFTYPE; 1049 1050 if ((!ismember) && (mode & S_ISGID)) 1051 return EPERM; 1052 } 1053 1054 /* change mode */ 1055 udf_setaccessmode(udf_node, mode); 1056 1057 /* mark node changed */ 1058 udf_node->i_flags |= IN_CHANGE; 1059 1060 return 0; 1061 } 1062 1063 1064 /* exported */ 1065 int 1066 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1067 { 1068 struct udf_node *udf_node = VTOI(vp); 1069 int error, extended; 1070 1071 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1072 return EROFS; 1073 1074 /* Decide whether this is a valid operation based on the file type. */ 1075 switch (vp->v_type) { 1076 case VDIR: 1077 return EISDIR; 1078 case VREG: 1079 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1080 return EROFS; 1081 break; 1082 case VBLK: 1083 /* FALLTHROUGH */ 1084 case VCHR: 1085 /* FALLTHROUGH */ 1086 case VFIFO: 1087 /* Allow modifications of special files even if in the file 1088 * system is mounted read-only (we are not modifying the 1089 * files themselves, but the objects they represent). */ 1090 return 0; 1091 default: 1092 /* Anything else is unsupported. */ 1093 return EOPNOTSUPP; 1094 } 1095 1096 #if notyet 1097 /* TODO get vaflags from the extended attributes? */ 1098 /* Immutable or append-only files cannot be modified, either. */ 1099 if (node->flags & (IMMUTABLE | APPEND)) 1100 return EPERM; 1101 #endif 1102 1103 /* resize file to the requested size */ 1104 error = udf_resize_node(udf_node, newsize, &extended); 1105 1106 if (error == 0) { 1107 /* mark change */ 1108 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1109 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1110 udf_update(vp, NULL, NULL, NULL, 0); 1111 } 1112 1113 return error; 1114 } 1115 1116 1117 static int 1118 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1119 { 1120 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1121 return EROFS; 1122 1123 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1124 1125 return 0; 1126 } 1127 1128 1129 static int 1130 udf_chtimes(struct vnode *vp, 1131 struct timespec *atime, struct timespec *mtime, 1132 struct timespec *birthtime, int setattrflags, 1133 kauth_cred_t cred) 1134 { 1135 struct udf_node *udf_node = VTOI(vp); 1136 uid_t euid, uid; 1137 gid_t gid; 1138 int issuperuser; 1139 int error; 1140 1141 #ifdef notyet 1142 /* TODO get vaflags from the extended attributes? */ 1143 /* Immutable or append-only files cannot be modified, either. */ 1144 if (udf_node->flags & (IMMUTABLE | APPEND)) 1145 return EPERM; 1146 #endif 1147 1148 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1149 return EROFS; 1150 1151 /* retrieve uid/gid values */ 1152 udf_getownership(udf_node, &uid, &gid); 1153 1154 /* check permissions */ 1155 euid = kauth_cred_geteuid(cred); 1156 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1157 issuperuser = (error == 0); 1158 1159 if (!issuperuser) { 1160 if (euid != uid) 1161 return EPERM; 1162 if ((setattrflags & VA_UTIMES_NULL) == 0) { 1163 error = VOP_ACCESS(vp, VWRITE, cred); 1164 if (error) 1165 return error; 1166 } 1167 } 1168 1169 /* update node flags depending on what times are passed */ 1170 if (atime->tv_sec != VNOVAL) 1171 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1172 udf_node->i_flags |= IN_ACCESS; 1173 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1174 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1175 1176 return udf_update(vp, atime, mtime, birthtime, 0); 1177 } 1178 1179 1180 int 1181 udf_setattr(void *v) 1182 { 1183 struct vop_setattr_args /* { 1184 struct vnode *a_vp; 1185 struct vattr *a_vap; 1186 kauth_cred_t a_cred; 1187 struct lwp *a_l; 1188 } */ *ap = v; 1189 struct vnode *vp = ap->a_vp; 1190 /* struct udf_node *udf_node = VTOI(vp); */ 1191 /* struct udf_mount *ump = udf_node->ump; */ 1192 kauth_cred_t cred = ap->a_cred; 1193 struct vattr *vap = ap->a_vap; 1194 int error; 1195 1196 DPRINTF(CALL, ("udf_setattr called\n")); 1197 1198 /* Abort if any unsettable attribute is given. */ 1199 error = 0; 1200 if (vap->va_type != VNON || 1201 vap->va_nlink != VNOVAL || 1202 vap->va_fsid != VNOVAL || 1203 vap->va_fileid != VNOVAL || 1204 vap->va_blocksize != VNOVAL || 1205 #ifdef notyet 1206 /* checks are debated */ 1207 vap->va_ctime.tv_sec != VNOVAL || 1208 vap->va_ctime.tv_nsec != VNOVAL || 1209 vap->va_birthtime.tv_sec != VNOVAL || 1210 vap->va_birthtime.tv_nsec != VNOVAL || 1211 #endif 1212 vap->va_gen != VNOVAL || 1213 vap->va_rdev != VNOVAL || 1214 vap->va_bytes != VNOVAL) 1215 error = EINVAL; 1216 1217 DPRINTF(ATTR, ("setattr changing:\n")); 1218 if (error == 0 && (vap->va_flags != VNOVAL)) { 1219 DPRINTF(ATTR, ("\tchflags\n")); 1220 error = udf_chflags(vp, vap->va_flags, cred); 1221 } 1222 1223 if (error == 0 && (vap->va_size != VNOVAL)) { 1224 DPRINTF(ATTR, ("\tchsize\n")); 1225 error = udf_chsize(vp, vap->va_size, cred); 1226 } 1227 1228 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1229 DPRINTF(ATTR, ("\tchown\n")); 1230 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1231 } 1232 1233 if (error == 0 && (vap->va_mode != VNOVAL)) { 1234 DPRINTF(ATTR, ("\tchmod\n")); 1235 error = udf_chmod(vp, vap->va_mode, cred); 1236 } 1237 1238 if (error == 0 && 1239 ((vap->va_atime.tv_sec != VNOVAL && 1240 vap->va_atime.tv_nsec != VNOVAL) || 1241 (vap->va_mtime.tv_sec != VNOVAL && 1242 vap->va_mtime.tv_nsec != VNOVAL)) 1243 ) { 1244 DPRINTF(ATTR, ("\tchtimes\n")); 1245 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1246 &vap->va_birthtime, vap->va_vaflags, cred); 1247 } 1248 VN_KNOTE(vp, NOTE_ATTRIB); 1249 1250 return error; 1251 } 1252 1253 /* --------------------------------------------------------------------- */ 1254 1255 /* 1256 * Return POSIX pathconf information for UDF file systems. 1257 */ 1258 int 1259 udf_pathconf(void *v) 1260 { 1261 struct vop_pathconf_args /* { 1262 struct vnode *a_vp; 1263 int a_name; 1264 register_t *a_retval; 1265 } */ *ap = v; 1266 uint32_t bits; 1267 1268 DPRINTF(CALL, ("udf_pathconf called\n")); 1269 1270 switch (ap->a_name) { 1271 case _PC_LINK_MAX: 1272 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1273 return 0; 1274 case _PC_NAME_MAX: 1275 *ap->a_retval = NAME_MAX; 1276 return 0; 1277 case _PC_PATH_MAX: 1278 *ap->a_retval = PATH_MAX; 1279 return 0; 1280 case _PC_PIPE_BUF: 1281 *ap->a_retval = PIPE_BUF; 1282 return 0; 1283 case _PC_CHOWN_RESTRICTED: 1284 *ap->a_retval = 1; 1285 return 0; 1286 case _PC_NO_TRUNC: 1287 *ap->a_retval = 1; 1288 return 0; 1289 case _PC_SYNC_IO: 1290 *ap->a_retval = 0; /* synchronised is off for performance */ 1291 return 0; 1292 case _PC_FILESIZEBITS: 1293 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1294 bits = 64; /* XXX ought to deliver 65 */ 1295 #if 0 1296 if (udf_node) 1297 bits = 64 * vp->v_mount->mnt_dev_bshift; 1298 #endif 1299 *ap->a_retval = bits; 1300 return 0; 1301 } 1302 1303 return EINVAL; 1304 } 1305 1306 1307 /* --------------------------------------------------------------------- */ 1308 1309 int 1310 udf_open(void *v) 1311 { 1312 struct vop_open_args /* { 1313 struct vnode *a_vp; 1314 int a_mode; 1315 kauth_cred_t a_cred; 1316 struct proc *a_p; 1317 } */ *ap = v; 1318 int flags; 1319 1320 DPRINTF(CALL, ("udf_open called\n")); 1321 1322 /* 1323 * Files marked append-only must be opened for appending. 1324 * TODO: get chflags(2) flags from extened attribute. 1325 */ 1326 flags = 0; 1327 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1328 return (EPERM); 1329 1330 return 0; 1331 } 1332 1333 1334 /* --------------------------------------------------------------------- */ 1335 1336 int 1337 udf_close(void *v) 1338 { 1339 struct vop_close_args /* { 1340 struct vnode *a_vp; 1341 int a_fflag; 1342 kauth_cred_t a_cred; 1343 struct proc *a_p; 1344 } */ *ap = v; 1345 struct vnode *vp = ap->a_vp; 1346 struct udf_node *udf_node = VTOI(vp); 1347 1348 DPRINTF(CALL, ("udf_close called\n")); 1349 udf_node = udf_node; /* shut up gcc */ 1350 1351 mutex_enter(&vp->v_interlock); 1352 if (vp->v_usecount > 1) 1353 udf_itimes(udf_node, NULL, NULL, NULL); 1354 mutex_exit(&vp->v_interlock); 1355 1356 return 0; 1357 } 1358 1359 1360 /* --------------------------------------------------------------------- */ 1361 1362 int 1363 udf_access(void *v) 1364 { 1365 struct vop_access_args /* { 1366 struct vnode *a_vp; 1367 int a_mode; 1368 kauth_cred_t a_cred; 1369 struct proc *a_p; 1370 } */ *ap = v; 1371 struct vnode *vp = ap->a_vp; 1372 mode_t mode = ap->a_mode; 1373 kauth_cred_t cred = ap->a_cred; 1374 /* struct udf_node *udf_node = VTOI(vp); */ 1375 struct vattr vap; 1376 int flags; 1377 int error; 1378 1379 DPRINTF(CALL, ("udf_access called\n")); 1380 1381 error = VOP_GETATTR(vp, &vap, NULL); 1382 if (error) 1383 return error; 1384 1385 /* check if we are allowed to write */ 1386 switch (vap.va_type) { 1387 case VDIR: 1388 case VLNK: 1389 case VREG: 1390 /* 1391 * normal nodes: check if we're on a read-only mounted 1392 * filingsystem and bomb out if we're trying to write. 1393 */ 1394 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1395 return EROFS; 1396 break; 1397 case VBLK: 1398 case VCHR: 1399 case VSOCK: 1400 case VFIFO: 1401 /* 1402 * special nodes: even on read-only mounted filingsystems 1403 * these are allowed to be written to if permissions allow. 1404 */ 1405 break; 1406 default: 1407 /* no idea what this is */ 1408 return EINVAL; 1409 } 1410 1411 /* noone may write immutable files */ 1412 /* TODO: get chflags(2) flags from extened attribute. */ 1413 flags = 0; 1414 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1415 return EPERM; 1416 1417 /* ask the generic vaccess to advice on security */ 1418 return vaccess(vp->v_type, 1419 vap.va_mode, vap.va_uid, vap.va_gid, 1420 mode, cred); 1421 } 1422 1423 /* --------------------------------------------------------------------- */ 1424 1425 int 1426 udf_create(void *v) 1427 { 1428 struct vop_create_args /* { 1429 struct vnode *a_dvp; 1430 struct vnode **a_vpp; 1431 struct componentname *a_cnp; 1432 struct vattr *a_vap; 1433 } */ *ap = v; 1434 struct vnode *dvp = ap->a_dvp; 1435 struct vnode **vpp = ap->a_vpp; 1436 struct vattr *vap = ap->a_vap; 1437 struct componentname *cnp = ap->a_cnp; 1438 int error; 1439 1440 DPRINTF(CALL, ("udf_create called\n")); 1441 error = udf_create_node(dvp, vpp, vap, cnp); 1442 1443 if (error || !(cnp->cn_flags & SAVESTART)) 1444 PNBUF_PUT(cnp->cn_pnbuf); 1445 vput(dvp); 1446 return error; 1447 } 1448 1449 /* --------------------------------------------------------------------- */ 1450 1451 int 1452 udf_mknod(void *v) 1453 { 1454 struct vop_mknod_args /* { 1455 struct vnode *a_dvp; 1456 struct vnode **a_vpp; 1457 struct componentname *a_cnp; 1458 struct vattr *a_vap; 1459 } */ *ap = v; 1460 struct vnode *dvp = ap->a_dvp; 1461 struct vnode **vpp = ap->a_vpp; 1462 struct vattr *vap = ap->a_vap; 1463 struct componentname *cnp = ap->a_cnp; 1464 int error; 1465 1466 DPRINTF(CALL, ("udf_mknod called\n")); 1467 error = udf_create_node(dvp, vpp, vap, cnp); 1468 1469 if (error || !(cnp->cn_flags & SAVESTART)) 1470 PNBUF_PUT(cnp->cn_pnbuf); 1471 vput(dvp); 1472 return error; 1473 } 1474 1475 /* --------------------------------------------------------------------- */ 1476 1477 int 1478 udf_mkdir(void *v) 1479 { 1480 struct vop_mkdir_args /* { 1481 struct vnode *a_dvp; 1482 struct vnode **a_vpp; 1483 struct componentname *a_cnp; 1484 struct vattr *a_vap; 1485 } */ *ap = v; 1486 struct vnode *dvp = ap->a_dvp; 1487 struct vnode **vpp = ap->a_vpp; 1488 struct vattr *vap = ap->a_vap; 1489 struct componentname *cnp = ap->a_cnp; 1490 int error; 1491 1492 DPRINTF(CALL, ("udf_mkdir called\n")); 1493 error = udf_create_node(dvp, vpp, vap, cnp); 1494 1495 if (error || !(cnp->cn_flags & SAVESTART)) 1496 PNBUF_PUT(cnp->cn_pnbuf); 1497 vput(dvp); 1498 return error; 1499 } 1500 1501 /* --------------------------------------------------------------------- */ 1502 1503 static int 1504 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1505 { 1506 struct udf_node *udf_node, *dir_node; 1507 struct vattr vap; 1508 int error; 1509 1510 DPRINTF(CALL, ("udf_link called\n")); 1511 error = 0; 1512 1513 /* some quick checks */ 1514 if (vp->v_type == VDIR) 1515 return EPERM; /* can't link a directory */ 1516 if (dvp->v_mount != vp->v_mount) 1517 return EXDEV; /* can't link across devices */ 1518 if (dvp == vp) 1519 return EPERM; /* can't be the same */ 1520 1521 /* lock node */ 1522 error = vn_lock(vp, LK_EXCLUSIVE); 1523 if (error) 1524 return error; 1525 1526 /* get attributes */ 1527 dir_node = VTOI(dvp); 1528 udf_node = VTOI(vp); 1529 1530 error = VOP_GETATTR(vp, &vap, FSCRED); 1531 if (error) 1532 return error; 1533 1534 /* check link count overflow */ 1535 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1536 return EMLINK; 1537 1538 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1539 } 1540 1541 int 1542 udf_link(void *v) 1543 { 1544 struct vop_link_args /* { 1545 struct vnode *a_dvp; 1546 struct vnode *a_vp; 1547 struct componentname *a_cnp; 1548 } */ *ap = v; 1549 struct vnode *dvp = ap->a_dvp; 1550 struct vnode *vp = ap->a_vp; 1551 struct componentname *cnp = ap->a_cnp; 1552 int error; 1553 1554 error = udf_do_link(dvp, vp, cnp); 1555 if (error) 1556 VOP_ABORTOP(dvp, cnp); 1557 1558 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1559 VOP_UNLOCK(vp, 0); 1560 1561 VN_KNOTE(vp, NOTE_LINK); 1562 VN_KNOTE(dvp, NOTE_WRITE); 1563 vput(dvp); 1564 1565 return error; 1566 } 1567 1568 /* --------------------------------------------------------------------- */ 1569 1570 static int 1571 udf_do_symlink(struct udf_node *udf_node, char *target) 1572 { 1573 struct pathcomp pathcomp; 1574 uint8_t *pathbuf, *pathpos, *compnamepos; 1575 char *mntonname; 1576 int pathlen, len, compnamelen, mntonnamelen; 1577 int error; 1578 1579 /* process `target' to an UDF structure */ 1580 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1581 pathpos = pathbuf; 1582 pathlen = 0; 1583 1584 if (*target == '/') { 1585 /* symlink starts from the root */ 1586 len = UDF_PATH_COMP_SIZE; 1587 memset(&pathcomp, 0, len); 1588 pathcomp.type = UDF_PATH_COMP_ROOT; 1589 1590 /* check if its mount-point relative! */ 1591 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1592 mntonnamelen = strlen(mntonname); 1593 if (strlen(target) >= mntonnamelen) { 1594 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1595 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1596 target += mntonnamelen; 1597 } 1598 } else { 1599 target++; 1600 } 1601 1602 memcpy(pathpos, &pathcomp, len); 1603 pathpos += len; 1604 pathlen += len; 1605 } 1606 1607 error = 0; 1608 while (*target) { 1609 /* ignore multiple '/' */ 1610 while (*target == '/') { 1611 target++; 1612 } 1613 if (!*target) 1614 break; 1615 1616 /* extract component name */ 1617 compnamelen = 0; 1618 compnamepos = target; 1619 while ((*target) && (*target != '/')) { 1620 target++; 1621 compnamelen++; 1622 } 1623 1624 /* just trunc if too long ?? (security issue) */ 1625 if (compnamelen >= 127) { 1626 error = ENAMETOOLONG; 1627 break; 1628 } 1629 1630 /* convert unix name to UDF name */ 1631 len = sizeof(struct pathcomp); 1632 memset(&pathcomp, 0, len); 1633 pathcomp.type = UDF_PATH_COMP_NAME; 1634 len = UDF_PATH_COMP_SIZE; 1635 1636 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1637 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1638 if ((compnamelen == 1) && (*compnamepos == '.')) 1639 pathcomp.type = UDF_PATH_COMP_CURDIR; 1640 1641 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1642 unix_to_udf_name( 1643 (char *) &pathcomp.ident, &pathcomp.l_ci, 1644 compnamepos, compnamelen, 1645 &udf_node->ump->logical_vol->desc_charset); 1646 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1647 } 1648 1649 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1650 error = ENAMETOOLONG; 1651 break; 1652 } 1653 1654 memcpy(pathpos, &pathcomp, len); 1655 pathpos += len; 1656 pathlen += len; 1657 } 1658 1659 if (error) { 1660 /* aparently too big */ 1661 free(pathbuf, M_UDFTEMP); 1662 return error; 1663 } 1664 1665 error = udf_grow_node(udf_node, pathlen); 1666 if (error) { 1667 /* failed to pregrow node */ 1668 free(pathbuf, M_UDFTEMP); 1669 return error; 1670 } 1671 1672 /* write out structure on the new file */ 1673 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1674 pathbuf, pathlen, 0, 1675 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1676 FSCRED, NULL, NULL); 1677 1678 /* return status of symlink contents writeout */ 1679 free(pathbuf, M_UDFTEMP); 1680 return error; 1681 } 1682 1683 1684 int 1685 udf_symlink(void *v) 1686 { 1687 struct vop_symlink_args /* { 1688 struct vnode *a_dvp; 1689 struct vnode **a_vpp; 1690 struct componentname *a_cnp; 1691 struct vattr *a_vap; 1692 char *a_target; 1693 } */ *ap = v; 1694 struct vnode *dvp = ap->a_dvp; 1695 struct vnode **vpp = ap->a_vpp; 1696 struct vattr *vap = ap->a_vap; 1697 struct componentname *cnp = ap->a_cnp; 1698 struct udf_node *dir_node; 1699 struct udf_node *udf_node; 1700 int error; 1701 1702 DPRINTF(CALL, ("udf_symlink called\n")); 1703 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1704 error = udf_create_node(dvp, vpp, vap, cnp); 1705 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1706 if (!error) { 1707 dir_node = VTOI(dvp); 1708 udf_node = VTOI(*vpp); 1709 KASSERT(udf_node); 1710 error = udf_do_symlink(udf_node, ap->a_target); 1711 if (error) { 1712 /* remove node */ 1713 udf_shrink_node(udf_node, 0); 1714 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1715 } 1716 } 1717 if (error || !(cnp->cn_flags & SAVESTART)) 1718 PNBUF_PUT(cnp->cn_pnbuf); 1719 vput(dvp); 1720 return error; 1721 } 1722 1723 /* --------------------------------------------------------------------- */ 1724 1725 int 1726 udf_readlink(void *v) 1727 { 1728 struct vop_readlink_args /* { 1729 struct vnode *a_vp; 1730 struct uio *a_uio; 1731 kauth_cred_t a_cred; 1732 } */ *ap = v; 1733 struct vnode *vp = ap->a_vp; 1734 struct uio *uio = ap->a_uio; 1735 kauth_cred_t cred = ap->a_cred; 1736 struct udf_node *udf_node; 1737 struct pathcomp pathcomp; 1738 struct vattr vattr; 1739 uint8_t *pathbuf, *targetbuf, *tmpname; 1740 uint8_t *pathpos, *targetpos; 1741 char *mntonname; 1742 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1743 int first, error; 1744 1745 DPRINTF(CALL, ("udf_readlink called\n")); 1746 1747 udf_node = VTOI(vp); 1748 error = VOP_GETATTR(vp, &vattr, cred); 1749 if (error) 1750 return error; 1751 1752 /* claim temporary buffers for translation */ 1753 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1754 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1755 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1756 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1757 memset(targetbuf, 0, PATH_MAX); 1758 1759 /* read contents of file in our temporary buffer */ 1760 error = vn_rdwr(UIO_READ, udf_node->vnode, 1761 pathbuf, vattr.va_size, 0, 1762 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1763 FSCRED, NULL, NULL); 1764 if (error) { 1765 /* failed to read in symlink contents */ 1766 free(pathbuf, M_UDFTEMP); 1767 free(targetbuf, M_UDFTEMP); 1768 free(tmpname, M_UDFTEMP); 1769 return error; 1770 } 1771 1772 /* convert to a unix path */ 1773 pathpos = pathbuf; 1774 pathlen = 0; 1775 targetpos = targetbuf; 1776 targetlen = PATH_MAX; 1777 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1778 mntonnamelen = strlen(mntonname); 1779 1780 error = 0; 1781 first = 1; 1782 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1783 len = UDF_PATH_COMP_SIZE; 1784 memcpy(&pathcomp, pathpos, len); 1785 l_ci = pathcomp.l_ci; 1786 switch (pathcomp.type) { 1787 case UDF_PATH_COMP_ROOT : 1788 /* XXX should check for l_ci; bugcompatible now */ 1789 if ((targetlen < 1) || !first) { 1790 error = EINVAL; 1791 break; 1792 } 1793 *targetpos++ = '/'; targetlen--; 1794 break; 1795 case UDF_PATH_COMP_MOUNTROOT : 1796 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1797 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1798 error = EINVAL; 1799 break; 1800 } 1801 memcpy(targetpos, mntonname, mntonnamelen); 1802 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1803 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1804 /* more follows, so must be directory */ 1805 *targetpos++ = '/'; targetlen--; 1806 } 1807 break; 1808 case UDF_PATH_COMP_PARENTDIR : 1809 /* XXX should check for l_ci; bugcompatible now */ 1810 if (targetlen < 3) { 1811 error = EINVAL; 1812 break; 1813 } 1814 *targetpos++ = '.'; targetlen--; 1815 *targetpos++ = '.'; targetlen--; 1816 *targetpos++ = '/'; targetlen--; 1817 break; 1818 case UDF_PATH_COMP_CURDIR : 1819 /* XXX should check for l_ci; bugcompatible now */ 1820 if (targetlen < 2) { 1821 error = EINVAL; 1822 break; 1823 } 1824 *targetpos++ = '.'; targetlen--; 1825 *targetpos++ = '/'; targetlen--; 1826 break; 1827 case UDF_PATH_COMP_NAME : 1828 if (l_ci == 0) { 1829 error = EINVAL; 1830 break; 1831 } 1832 memset(tmpname, 0, PATH_MAX); 1833 memcpy(&pathcomp, pathpos, len + l_ci); 1834 udf_to_unix_name(tmpname, MAXPATHLEN, 1835 pathcomp.ident, l_ci, 1836 &udf_node->ump->logical_vol->desc_charset); 1837 namelen = strlen(tmpname); 1838 if (targetlen < namelen + 1) { 1839 error = EINVAL; 1840 break; 1841 } 1842 memcpy(targetpos, tmpname, namelen); 1843 targetpos += namelen; targetlen -= namelen; 1844 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1845 /* more follows, so must be directory */ 1846 *targetpos++ = '/'; targetlen--; 1847 } 1848 break; 1849 default : 1850 error = EINVAL; 1851 break; 1852 } 1853 first = 0; 1854 if (error) 1855 break; 1856 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1857 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1858 1859 } 1860 /* all processed? */ 1861 if (vattr.va_size - pathlen > 0) 1862 error = EINVAL; 1863 1864 /* uiomove() to destination */ 1865 if (!error) 1866 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1867 1868 free(pathbuf, M_UDFTEMP); 1869 free(targetbuf, M_UDFTEMP); 1870 free(tmpname, M_UDFTEMP); 1871 1872 return error; 1873 } 1874 1875 /* --------------------------------------------------------------------- */ 1876 1877 /* 1878 * Check if source directory is in the path of the target directory. Target 1879 * is supplied locked, source is unlocked. The target is always vput before 1880 * returning. Modeled after UFS. 1881 * 1882 * If source is on the path from target to the root, return error. 1883 */ 1884 1885 static int 1886 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1887 { 1888 struct udf_mount *ump = target->ump; 1889 struct udf_node *res_node; 1890 struct long_ad icb_loc, *root_icb; 1891 const char *name; 1892 int namelen; 1893 int error, found; 1894 1895 name = ".."; 1896 namelen = 2; 1897 error = 0; 1898 res_node = target; 1899 1900 root_icb = &ump->fileset_desc->rootdir_icb; 1901 1902 /* if nodes are equal, it is no use looking */ 1903 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1904 error = EEXIST; 1905 goto out; 1906 } 1907 1908 /* nothing can exist before the root */ 1909 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1910 error = 0; 1911 goto out; 1912 } 1913 1914 for (;;) { 1915 DPRINTF(NODE, ("udf_on_rootpath : " 1916 "source vp %p, looking at vp %p\n", 1917 source->vnode, res_node->vnode)); 1918 1919 /* sanity check */ 1920 if (res_node->vnode->v_type != VDIR) { 1921 error = ENOTDIR; 1922 goto out; 1923 } 1924 1925 /* go down one level */ 1926 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1927 &icb_loc, &found); 1928 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1929 "found %d\n", error, found)); 1930 1931 if (!found) 1932 error = ENOENT; 1933 if (error) 1934 goto out; 1935 1936 /* did we encounter source node? */ 1937 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1938 error = EINVAL; 1939 goto out; 1940 } 1941 1942 /* did we encounter the root node? */ 1943 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1944 error = 0; 1945 goto out; 1946 } 1947 1948 /* push our intermediate node, we're done with it */ 1949 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1950 vput(res_node->vnode); 1951 1952 DPRINTF(NODE, ("\tgetting the .. node\n")); 1953 error = udf_get_node(ump, &icb_loc, &res_node); 1954 1955 if (error) { /* argh, bail out */ 1956 KASSERT(res_node == NULL); 1957 // res_node = NULL; 1958 goto out; 1959 } 1960 } 1961 out: 1962 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1963 1964 /* put our last node */ 1965 if (res_node) 1966 vput(res_node->vnode); 1967 1968 return error; 1969 } 1970 1971 /* note: i tried to follow the logics of the tmpfs rename code */ 1972 int 1973 udf_rename(void *v) 1974 { 1975 struct vop_rename_args /* { 1976 struct vnode *a_fdvp; 1977 struct vnode *a_fvp; 1978 struct componentname *a_fcnp; 1979 struct vnode *a_tdvp; 1980 struct vnode *a_tvp; 1981 struct componentname *a_tcnp; 1982 } */ *ap = v; 1983 struct vnode *tvp = ap->a_tvp; 1984 struct vnode *tdvp = ap->a_tdvp; 1985 struct vnode *fvp = ap->a_fvp; 1986 struct vnode *fdvp = ap->a_fdvp; 1987 struct componentname *tcnp = ap->a_tcnp; 1988 struct componentname *fcnp = ap->a_fcnp; 1989 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1990 struct vattr fvap, tvap; 1991 int error; 1992 1993 DPRINTF(CALL, ("udf_rename called\n")); 1994 1995 /* disallow cross-device renames */ 1996 if (fvp->v_mount != tdvp->v_mount || 1997 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1998 error = EXDEV; 1999 goto out_unlocked; 2000 } 2001 2002 fnode = VTOI(fvp); 2003 fdnode = VTOI(fdvp); 2004 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2005 tdnode = VTOI(tdvp); 2006 2007 /* lock our source dir */ 2008 if (fdnode != tdnode) { 2009 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 2010 if (error != 0) 2011 goto out_unlocked; 2012 } 2013 2014 /* get info about the node to be moved */ 2015 error = VOP_GETATTR(fvp, &fvap, FSCRED); 2016 KASSERT(error == 0); 2017 2018 /* check when to delete the old already existing entry */ 2019 if (tvp) { 2020 /* get info about the node to be moved to */ 2021 error = VOP_GETATTR(fvp, &tvap, FSCRED); 2022 KASSERT(error == 0); 2023 2024 /* if both dirs, make sure the destination is empty */ 2025 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 2026 if (tvap.va_nlink > 2) { 2027 error = ENOTEMPTY; 2028 goto out; 2029 } 2030 } 2031 /* if moving dir, make sure destination is dir too */ 2032 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2033 error = ENOTDIR; 2034 goto out; 2035 } 2036 /* if we're moving a non-directory, make sure dest is no dir */ 2037 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2038 error = EISDIR; 2039 goto out; 2040 } 2041 } 2042 2043 /* check if moving a directory to a new parent is allowed */ 2044 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2045 /* release tvp since we might encounter it and lock up */ 2046 if (tvp) 2047 vput(tvp); 2048 2049 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2050 vref(tdvp); 2051 2052 /* search if fnode is a component of tdnode's path to root */ 2053 error = udf_on_rootpath(fnode, tdnode); 2054 2055 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2056 2057 if (error) { 2058 /* compensate for our vref earlier */ 2059 vrele(tdvp); 2060 goto out; 2061 } 2062 2063 /* relock tdvp; its still here due to the vref earlier */ 2064 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2065 2066 /* 2067 * re-lookup tvp since the parent has been unlocked, so could 2068 * have changed/removed in the meantime. 2069 */ 2070 tcnp->cn_flags &= ~SAVESTART; 2071 error = relookup(tdvp, &tvp, tcnp); 2072 if (error) { 2073 vput(tdvp); 2074 goto out; 2075 } 2076 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2077 } 2078 2079 /* remove existing entry if present */ 2080 if (tvp) 2081 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2082 2083 /* create new directory entry for the node */ 2084 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2085 if (error) 2086 goto out; 2087 2088 /* unlink old directory entry for the node, if failing, unattach new */ 2089 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2090 if (error) 2091 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2092 if (error) 2093 goto out; 2094 2095 /* update tnode's '..' if moving directory to new parent */ 2096 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2097 /* update fnode's '..' entry */ 2098 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2099 if (error) { 2100 /* 'try' to recover from this situation */ 2101 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2102 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2103 } 2104 } 2105 2106 out: 2107 if (fdnode != tdnode) 2108 VOP_UNLOCK(fdvp, 0); 2109 2110 out_unlocked: 2111 VOP_ABORTOP(tdvp, tcnp); 2112 if (tdvp == tvp) 2113 vrele(tdvp); 2114 else 2115 vput(tdvp); 2116 if (tvp) 2117 vput(tvp); 2118 VOP_ABORTOP(fdvp, fcnp); 2119 2120 /* release source nodes. */ 2121 vrele(fdvp); 2122 vrele(fvp); 2123 2124 return error; 2125 } 2126 2127 /* --------------------------------------------------------------------- */ 2128 2129 int 2130 udf_remove(void *v) 2131 { 2132 struct vop_remove_args /* { 2133 struct vnode *a_dvp; 2134 struct vnode *a_vp; 2135 struct componentname *a_cnp; 2136 } */ *ap = v; 2137 struct vnode *dvp = ap->a_dvp; 2138 struct vnode *vp = ap->a_vp; 2139 struct componentname *cnp = ap->a_cnp; 2140 struct udf_node *dir_node = VTOI(dvp);; 2141 struct udf_node *udf_node = VTOI(vp); 2142 struct udf_mount *ump = dir_node->ump; 2143 int error; 2144 2145 DPRINTF(CALL, ("udf_remove called\n")); 2146 if (vp->v_type != VDIR) { 2147 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2148 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2149 } else { 2150 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2151 error = EPERM; 2152 } 2153 2154 if (error == 0) { 2155 VN_KNOTE(vp, NOTE_DELETE); 2156 VN_KNOTE(dvp, NOTE_WRITE); 2157 } 2158 2159 if (dvp == vp) 2160 vrele(vp); 2161 else 2162 vput(vp); 2163 vput(dvp); 2164 2165 return error; 2166 } 2167 2168 /* --------------------------------------------------------------------- */ 2169 2170 int 2171 udf_rmdir(void *v) 2172 { 2173 struct vop_rmdir_args /* { 2174 struct vnode *a_dvp; 2175 struct vnode *a_vp; 2176 struct componentname *a_cnp; 2177 } */ *ap = v; 2178 struct vnode *vp = ap->a_vp; 2179 struct vnode *dvp = ap->a_dvp; 2180 struct componentname *cnp = ap->a_cnp; 2181 struct udf_node *dir_node = VTOI(dvp);; 2182 struct udf_node *udf_node = VTOI(vp); 2183 struct udf_mount *ump = dir_node->ump; 2184 int refcnt, error; 2185 2186 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2187 2188 /* don't allow '.' to be deleted */ 2189 if (dir_node == udf_node) { 2190 vrele(dvp); 2191 vput(vp); 2192 return EINVAL; 2193 } 2194 2195 /* check to see if the directory is empty */ 2196 error = 0; 2197 if (dir_node->fe) { 2198 refcnt = udf_rw16(udf_node->fe->link_cnt); 2199 } else { 2200 refcnt = udf_rw16(udf_node->efe->link_cnt); 2201 } 2202 if (refcnt > 1) { 2203 /* NOT empty */ 2204 vput(dvp); 2205 vput(vp); 2206 return ENOTEMPTY; 2207 } 2208 2209 /* detach the node from the directory */ 2210 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2211 if (error == 0) { 2212 cache_purge(vp); 2213 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2214 VN_KNOTE(vp, NOTE_DELETE); 2215 } 2216 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2217 2218 /* unput the nodes and exit */ 2219 vput(dvp); 2220 vput(vp); 2221 2222 return error; 2223 } 2224 2225 /* --------------------------------------------------------------------- */ 2226 2227 int 2228 udf_fsync(void *v) 2229 { 2230 struct vop_fsync_args /* { 2231 struct vnode *a_vp; 2232 kauth_cred_t a_cred; 2233 int a_flags; 2234 off_t offlo; 2235 off_t offhi; 2236 struct proc *a_p; 2237 } */ *ap = v; 2238 struct vnode *vp = ap->a_vp; 2239 struct udf_node *udf_node = VTOI(vp); 2240 int error, flags, wait; 2241 2242 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2243 udf_node, 2244 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2245 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2246 2247 /* flush data and wait for it when requested */ 2248 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2249 vflushbuf(vp, wait); 2250 2251 if (udf_node == NULL) { 2252 printf("udf_fsync() called on NULL udf_node!\n"); 2253 return 0; 2254 } 2255 if (vp->v_tag != VT_UDF) { 2256 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2257 return 0; 2258 } 2259 2260 /* set our times */ 2261 udf_itimes(udf_node, NULL, NULL, NULL); 2262 2263 /* if called when mounted readonly, never write back */ 2264 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2265 return 0; 2266 2267 /* if only data is requested, return */ 2268 if (ap->a_flags & FSYNC_DATAONLY) 2269 return 0; 2270 2271 /* check if the node is dirty 'enough'*/ 2272 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2273 if (flags == 0) 2274 return 0; 2275 2276 /* if we don't have to wait, check for IO pending */ 2277 if (!wait) { 2278 if (vp->v_numoutput > 0) { 2279 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2280 return 0; 2281 } 2282 if (udf_node->outstanding_bufs > 0) { 2283 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2284 return 0; 2285 } 2286 if (udf_node->outstanding_nodedscr > 0) { 2287 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2288 return 0; 2289 } 2290 } 2291 2292 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2293 if (wait) { 2294 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2295 mutex_enter(&vp->v_interlock); 2296 while (vp->v_numoutput) { 2297 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2298 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2299 } 2300 mutex_exit(&vp->v_interlock); 2301 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2302 } 2303 2304 /* write out node and wait for it if requested */ 2305 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2306 error = udf_writeout_node(udf_node, wait); 2307 if (error) 2308 return error; 2309 2310 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2311 2312 return 0; 2313 } 2314 2315 /* --------------------------------------------------------------------- */ 2316 2317 int 2318 udf_advlock(void *v) 2319 { 2320 struct vop_advlock_args /* { 2321 struct vnode *a_vp; 2322 void *a_id; 2323 int a_op; 2324 struct flock *a_fl; 2325 int a_flags; 2326 } */ *ap = v; 2327 struct vnode *vp = ap->a_vp; 2328 struct udf_node *udf_node = VTOI(vp); 2329 struct file_entry *fe; 2330 struct extfile_entry *efe; 2331 uint64_t file_size; 2332 2333 DPRINTF(LOCKING, ("udf_advlock called\n")); 2334 2335 /* get directory filesize */ 2336 if (udf_node->fe) { 2337 fe = udf_node->fe; 2338 file_size = udf_rw64(fe->inf_len); 2339 } else { 2340 assert(udf_node->efe); 2341 efe = udf_node->efe; 2342 file_size = udf_rw64(efe->inf_len); 2343 } 2344 2345 return lf_advlock(ap, &udf_node->lockf, file_size); 2346 } 2347 2348 /* --------------------------------------------------------------------- */ 2349 2350 /* Global vfs vnode data structures for udfs */ 2351 int (**udf_vnodeop_p)(void *); 2352 2353 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2354 { &vop_default_desc, vn_default_error }, 2355 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2356 { &vop_create_desc, udf_create }, /* create */ 2357 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2358 { &vop_open_desc, udf_open }, /* open */ 2359 { &vop_close_desc, udf_close }, /* close */ 2360 { &vop_access_desc, udf_access }, /* access */ 2361 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2362 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2363 { &vop_read_desc, udf_read }, /* read */ 2364 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2365 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2366 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2367 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2368 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2369 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2370 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2371 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2372 { &vop_seek_desc, genfs_seek }, /* seek */ 2373 { &vop_remove_desc, udf_remove }, /* remove */ 2374 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2375 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2376 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2377 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2378 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2379 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2380 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2381 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2382 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2383 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2384 { &vop_lock_desc, genfs_lock }, /* lock */ 2385 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2386 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2387 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2388 /* { &vop_print_desc, udf_print }, */ /* print */ 2389 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2390 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2391 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2392 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2393 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2394 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2395 { NULL, NULL } 2396 }; 2397 2398 2399 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2400 &udf_vnodeop_p, udf_vnodeop_entries 2401 }; 2402 2403
Indexes created Thu Oct 02 14:10:14 GMT 2025