1 /* $NetBSD: udf_vnops.c,v 1.54 2009/07/30 12:13:51 reinoud Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Generic parts are derived from software contributed to The NetBSD Foundation 28 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 29 * 2005 program. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __KERNEL_RCSID(0, "$NetBSD: udf_vnops.c,v 1.54 2009/07/30 12:13:51 reinoud Exp $"); 36 #endif /* not lint */ 37 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 43 #include <sys/kernel.h> 44 #include <sys/file.h> /* define FWRITE ... */ 45 #include <sys/stat.h> 46 #include <sys/buf.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/lockf.h> 54 #include <sys/kauth.h> 55 56 #include <miscfs/genfs/genfs.h> 57 #include <uvm/uvm_extern.h> 58 59 #include <fs/udf/ecma167-udf.h> 60 #include <fs/udf/udf_mount.h> 61 #include "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 /* system nodes are not writen out on inactive, so flush */ 109 udf_node->i_flags = 0; 110 } 111 112 *ap->a_recycle = false; 113 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 114 /* remove this file's allocation */ 115 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 116 *ap->a_recycle = true; 117 udf_delete_node(udf_node); 118 VOP_UNLOCK(vp, 0); 119 vrecycle(vp, NULL, curlwp); 120 return 0; 121 } 122 123 /* write out its node */ 124 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 125 udf_update(vp, NULL, NULL, NULL, 0); 126 VOP_UNLOCK(vp, 0); 127 128 return 0; 129 } 130 131 /* --------------------------------------------------------------------- */ 132 133 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 134 135 int 136 udf_reclaim(void *v) 137 { 138 struct vop_reclaim_args /* { 139 struct vnode *a_vp; 140 } */ *ap = v; 141 struct vnode *vp = ap->a_vp; 142 struct udf_node *udf_node = VTOI(vp); 143 144 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 145 if (prtactive && vp->v_usecount > 1) 146 vprint("udf_reclaim(): pushing active", vp); 147 148 if (udf_node == NULL) { 149 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 150 return 0; 151 } 152 153 /* update note for closure */ 154 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 155 156 /* async check to see if all node descriptors are written out */ 157 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 158 vprint("udf_reclaim(): waiting for writeout\n", vp); 159 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 160 } 161 162 /* purge old data from namei */ 163 cache_purge(vp); 164 165 /* dispose all node knowledge */ 166 udf_dispose_node(udf_node); 167 168 return 0; 169 } 170 171 /* --------------------------------------------------------------------- */ 172 173 int 174 udf_read(void *v) 175 { 176 struct vop_read_args /* { 177 struct vnode *a_vp; 178 struct uio *a_uio; 179 int a_ioflag; 180 kauth_cred_t a_cred; 181 } */ *ap = v; 182 struct vnode *vp = ap->a_vp; 183 struct uio *uio = ap->a_uio; 184 int ioflag = ap->a_ioflag; 185 int advice = IO_ADV_DECODE(ap->a_ioflag); 186 struct uvm_object *uobj; 187 struct udf_node *udf_node = VTOI(vp); 188 struct file_entry *fe; 189 struct extfile_entry *efe; 190 uint64_t file_size; 191 vsize_t len; 192 int error; 193 194 /* 195 * XXX reading from extended attributes not yet implemented. FreeBSD 196 * has it in mind to forward the IO_EXT read call to the 197 * VOP_READEXTATTR(). 198 */ 199 200 DPRINTF(READ, ("udf_read called\n")); 201 202 /* can this happen? some filingsystems have this check */ 203 if (uio->uio_offset < 0) 204 return EINVAL; 205 if (uio->uio_resid == 0) 206 return 0; 207 208 /* protect against rogue programs reading raw directories and links */ 209 if ((ioflag & IO_ALTSEMANTICS) == 0) { 210 if (vp->v_type == VDIR) 211 return EISDIR; 212 /* all but regular files just give EINVAL */ 213 if (vp->v_type != VREG) 214 return EINVAL; 215 } 216 217 assert(udf_node); 218 assert(udf_node->fe || udf_node->efe); 219 220 /* get file/directory filesize */ 221 if (udf_node->fe) { 222 fe = udf_node->fe; 223 file_size = udf_rw64(fe->inf_len); 224 } else { 225 assert(udf_node->efe); 226 efe = udf_node->efe; 227 file_size = udf_rw64(efe->inf_len); 228 } 229 230 /* read contents using buffercache */ 231 uobj = &vp->v_uobj; 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 error = ubc_uiomove(uobj, uio, len, advice, 245 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 246 if (error) 247 break; 248 } 249 250 /* note access time unless not requested */ 251 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 252 udf_node->i_flags |= IN_ACCESS; 253 if ((ioflag & IO_SYNC) == IO_SYNC) 254 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 255 } 256 257 return error; 258 } 259 260 /* --------------------------------------------------------------------- */ 261 262 int 263 udf_write(void *v) 264 { 265 struct vop_write_args /* { 266 struct vnode *a_vp; 267 struct uio *a_uio; 268 int a_ioflag; 269 kauth_cred_t a_cred; 270 } */ *ap = v; 271 struct vnode *vp = ap->a_vp; 272 struct uio *uio = ap->a_uio; 273 int ioflag = ap->a_ioflag; 274 kauth_cred_t cred = ap->a_cred; 275 int advice = IO_ADV_DECODE(ap->a_ioflag); 276 struct uvm_object *uobj; 277 struct udf_node *udf_node = VTOI(vp); 278 struct file_entry *fe; 279 struct extfile_entry *efe; 280 uint64_t file_size, old_size, old_offset; 281 vsize_t len; 282 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 283 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 284 int error; 285 int resid, extended; 286 287 /* 288 * XXX writing to extended attributes not yet implemented. FreeBSD has 289 * it in mind to forward the IO_EXT read call to the 290 * VOP_READEXTATTR(). 291 */ 292 293 DPRINTF(WRITE, ("udf_write called\n")); 294 295 /* can this happen? some filingsystems have this check */ 296 if (uio->uio_offset < 0) 297 return EINVAL; 298 if (uio->uio_resid == 0) 299 return 0; 300 301 /* protect against rogue programs writing raw directories or links */ 302 if ((ioflag & IO_ALTSEMANTICS) == 0) { 303 if (vp->v_type == VDIR) 304 return EISDIR; 305 /* all but regular files just give EINVAL for now */ 306 if (vp->v_type != VREG) 307 return EINVAL; 308 } 309 310 assert(udf_node); 311 assert(udf_node->fe || udf_node->efe); 312 313 /* get file/directory filesize */ 314 if (udf_node->fe) { 315 fe = udf_node->fe; 316 file_size = udf_rw64(fe->inf_len); 317 } else { 318 assert(udf_node->efe); 319 efe = udf_node->efe; 320 file_size = udf_rw64(efe->inf_len); 321 } 322 old_size = file_size; 323 324 /* if explicitly asked to append, uio_offset can be wrong? */ 325 if (ioflag & IO_APPEND) 326 uio->uio_offset = file_size; 327 328 extended = (uio->uio_offset + uio->uio_resid > file_size); 329 if (extended) { 330 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 331 file_size, uio->uio_offset + uio->uio_resid)); 332 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 333 if (error) 334 return error; 335 file_size = uio->uio_offset + uio->uio_resid; 336 } 337 338 /* write contents using buffercache */ 339 uobj = &vp->v_uobj; 340 resid = uio->uio_resid; 341 error = 0; 342 343 uvm_vnp_setwritesize(vp, file_size); 344 old_offset = uio->uio_offset; 345 while (uio->uio_resid > 0) { 346 /* maximise length to file extremity */ 347 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 348 if (len == 0) 349 break; 350 351 genfs_node_wrlock(vp); 352 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 353 genfs_node_unlock(vp); 354 if (error) 355 break; 356 357 /* ubc, here we come, prepare to trap */ 358 error = ubc_uiomove(uobj, uio, len, advice, 359 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 360 if (error) 361 break; 362 363 /* 364 * flush what we just wrote if necessary. 365 * XXXUBC simplistic async flushing. 366 * 367 * this one works on page sizes. Directories are excluded 368 * since its file data that we want to purge. 369 */ 370 if (!async && (vp->v_type != VDIR) && 371 (uio->uio_offset - old_offset >= PAGE_SIZE)) { 372 mutex_enter(&vp->v_interlock); 373 error = VOP_PUTPAGES(vp, 374 ptoa(atop(old_offset)), 375 ptoa(atop(uio->uio_offset + PAGE_SIZE-1)), 376 PGO_CLEANIT); 377 old_offset = uio->uio_offset; 378 } 379 } 380 uvm_vnp_setsize(vp, file_size); 381 382 /* mark node changed and request update */ 383 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 384 385 /* 386 * XXX TODO FFS has code here to reset setuid & setgid when we're not 387 * the superuser as a precaution against tampering. 388 */ 389 390 /* if we wrote a thing, note write action on vnode */ 391 if (resid > uio->uio_resid) 392 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 393 394 if (error) { 395 /* bring back file size to its former size */ 396 /* take notice of its errors? */ 397 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 398 399 /* roll back uio */ 400 uio->uio_offset -= resid - uio->uio_resid; 401 uio->uio_resid = resid; 402 } else { 403 /* if we write and we're synchronous, update node */ 404 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 405 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 406 } 407 408 return error; 409 } 410 411 412 /* --------------------------------------------------------------------- */ 413 414 /* 415 * `Special' bmap functionality that translates all incomming requests to 416 * translate to vop_strategy() calls with the same blocknumbers effectively 417 * not translating at all. 418 */ 419 420 int 421 udf_trivial_bmap(void *v) 422 { 423 struct vop_bmap_args /* { 424 struct vnode *a_vp; 425 daddr_t a_bn; 426 struct vnode **a_vpp; 427 daddr_t *a_bnp; 428 int *a_runp; 429 } */ *ap = v; 430 struct vnode *vp = ap->a_vp; /* our node */ 431 struct vnode **vpp = ap->a_vpp; /* return node */ 432 daddr_t *bnp = ap->a_bnp; /* translated */ 433 daddr_t bn = ap->a_bn; /* origional */ 434 int *runp = ap->a_runp; 435 struct udf_node *udf_node = VTOI(vp); 436 uint32_t lb_size; 437 438 /* get logical block size */ 439 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 440 441 /* could return `-1' to indicate holes/zeros */ 442 /* translate 1:1 */ 443 *bnp = bn; 444 445 /* set the vnode to read the data from with strategy on itself */ 446 if (vpp) 447 *vpp = vp; 448 449 /* set runlength of maximum block size */ 450 if (runp) 451 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 452 453 /* return success */ 454 return 0; 455 } 456 457 /* --------------------------------------------------------------------- */ 458 459 int 460 udf_vfsstrategy(void *v) 461 { 462 struct vop_strategy_args /* { 463 struct vnode *a_vp; 464 struct buf *a_bp; 465 } */ *ap = v; 466 struct vnode *vp = ap->a_vp; 467 struct buf *bp = ap->a_bp; 468 struct udf_node *udf_node = VTOI(vp); 469 uint32_t lb_size, from, sectors; 470 int error; 471 472 DPRINTF(STRATEGY, ("udf_strategy called\n")); 473 474 /* check if we ought to be here */ 475 if (vp->v_type == VBLK || vp->v_type == VCHR) 476 panic("udf_strategy: spec"); 477 478 /* only filebuffers ought to be read/write by this, no descriptors */ 479 assert(bp->b_blkno >= 0); 480 481 /* get sector size */ 482 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 483 484 /* calculate sector to start from */ 485 from = bp->b_blkno; 486 487 /* calculate length to fetch/store in sectors */ 488 sectors = bp->b_bcount / lb_size; 489 assert(bp->b_bcount > 0); 490 491 /* NEVER assume later that this buffer is already translated */ 492 /* bp->b_lblkno = bp->b_blkno; */ 493 494 /* check assertions: we OUGHT to always get multiples of this */ 495 assert(sectors * lb_size == bp->b_bcount); 496 497 /* issue buffer */ 498 error = 0; 499 if (bp->b_flags & B_READ) { 500 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 501 ", sector %d for %d sectors\n", 502 vp, bp, bp->b_blkno, from, sectors)); 503 504 /* read buffer from the udf_node, translate vtop on the way*/ 505 udf_read_filebuf(udf_node, bp); 506 } else { 507 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 508 ", sector %d for %d sectors\n", 509 vp, bp, bp->b_blkno, from, sectors)); 510 511 /* write buffer to the udf_node, translate vtop on the way*/ 512 udf_write_filebuf(udf_node, bp); 513 } 514 515 return bp->b_error; 516 } 517 518 /* --------------------------------------------------------------------- */ 519 520 int 521 udf_readdir(void *v) 522 { 523 struct vop_readdir_args /* { 524 struct vnode *a_vp; 525 struct uio *a_uio; 526 kauth_cred_t a_cred; 527 int *a_eofflag; 528 off_t **a_cookies; 529 int *a_ncookies; 530 } */ *ap = v; 531 struct uio *uio = ap->a_uio; 532 struct vnode *vp = ap->a_vp; 533 struct udf_node *udf_node = VTOI(vp); 534 struct file_entry *fe; 535 struct extfile_entry *efe; 536 struct fileid_desc *fid; 537 struct dirent *dirent; 538 uint64_t file_size, diroffset, transoffset; 539 uint32_t lb_size; 540 int error; 541 542 DPRINTF(READDIR, ("udf_readdir called\n")); 543 544 /* This operation only makes sense on directory nodes. */ 545 if (vp->v_type != VDIR) 546 return ENOTDIR; 547 548 /* get directory filesize */ 549 if (udf_node->fe) { 550 fe = udf_node->fe; 551 file_size = udf_rw64(fe->inf_len); 552 } else { 553 assert(udf_node->efe); 554 efe = udf_node->efe; 555 file_size = udf_rw64(efe->inf_len); 556 } 557 558 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 559 560 /* 561 * Add `.' pseudo entry if at offset zero since its not in the fid 562 * stream 563 */ 564 if (uio->uio_offset == 0) { 565 DPRINTF(READDIR, ("\t'.' inserted\n")); 566 strcpy(dirent->d_name, "."); 567 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 568 dirent->d_type = DT_DIR; 569 dirent->d_namlen = strlen(dirent->d_name); 570 dirent->d_reclen = _DIRENT_SIZE(dirent); 571 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 572 573 /* mark with magic value that we have done the dummy */ 574 uio->uio_offset = UDF_DIRCOOKIE_DOT; 575 } 576 577 /* we are called just as long as we keep on pushing data in */ 578 error = 0; 579 if (uio->uio_offset < file_size) { 580 /* allocate temporary space for fid */ 581 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 582 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 583 584 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 585 uio->uio_offset = 0; 586 587 diroffset = uio->uio_offset; 588 transoffset = diroffset; 589 while (diroffset < file_size) { 590 DPRINTF(READDIR, ("\tread in fid stream\n")); 591 /* transfer a new fid/dirent */ 592 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 593 DPRINTFIF(READDIR, error, ("read error in read fid " 594 "stream : %d\n", error)); 595 if (error) 596 break; 597 598 /* 599 * If there isn't enough space in the uio to return a 600 * whole dirent, break off read 601 */ 602 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 603 break; 604 605 /* remember the last entry we transfered */ 606 transoffset = diroffset; 607 608 /* skip deleted entries */ 609 if (fid->file_char & UDF_FILE_CHAR_DEL) 610 continue; 611 612 /* skip not visible files */ 613 if (fid->file_char & UDF_FILE_CHAR_VIS) 614 continue; 615 616 /* copy dirent to the caller */ 617 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 618 dirent->d_name, dirent->d_type)); 619 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 620 } 621 622 /* pass on last transfered offset */ 623 uio->uio_offset = transoffset; 624 free(fid, M_UDFTEMP); 625 } 626 627 if (ap->a_eofflag) 628 *ap->a_eofflag = (uio->uio_offset >= file_size); 629 630 #ifdef DEBUG 631 if (udf_verbose & UDF_DEBUG_READDIR) { 632 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 633 if (ap->a_eofflag) 634 printf("returning EOF ? %d\n", *ap->a_eofflag); 635 if (error) 636 printf("readdir returning error %d\n", error); 637 } 638 #endif 639 640 free(dirent, M_UDFTEMP); 641 return error; 642 } 643 644 /* --------------------------------------------------------------------- */ 645 646 int 647 udf_lookup(void *v) 648 { 649 struct vop_lookup_args /* { 650 struct vnode *a_dvp; 651 struct vnode **a_vpp; 652 struct componentname *a_cnp; 653 } */ *ap = v; 654 struct vnode *dvp = ap->a_dvp; 655 struct vnode **vpp = ap->a_vpp; 656 struct componentname *cnp = ap->a_cnp; 657 struct udf_node *dir_node, *res_node; 658 struct udf_mount *ump; 659 struct long_ad icb_loc; 660 const char *name; 661 int namelen, nameiop, islastcn, mounted_ro; 662 int vnodetp; 663 int error, found; 664 665 dir_node = VTOI(dvp); 666 ump = dir_node->ump; 667 *vpp = NULL; 668 669 DPRINTF(LOOKUP, ("udf_lookup called\n")); 670 671 /* simplify/clarification flags */ 672 nameiop = cnp->cn_nameiop; 673 islastcn = cnp->cn_flags & ISLASTCN; 674 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 675 676 /* check exec/dirread permissions first */ 677 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 678 if (error) 679 return error; 680 681 DPRINTF(LOOKUP, ("\taccess ok\n")); 682 683 /* 684 * If requesting a modify on the last path element on a read-only 685 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 686 */ 687 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 688 return EROFS; 689 690 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 691 cnp->cn_nameptr)); 692 /* look in the nami cache; returns 0 on success!! */ 693 error = cache_lookup(dvp, vpp, cnp); 694 if (error >= 0) 695 return error; 696 697 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 698 699 /* 700 * Obviously, the file is not (anymore) in the namecache, we have to 701 * search for it. There are three basic cases: '.', '..' and others. 702 * 703 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 704 */ 705 error = 0; 706 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 707 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 708 /* special case 1 '.' */ 709 VREF(dvp); 710 *vpp = dvp; 711 /* done */ 712 } else if (cnp->cn_flags & ISDOTDOT) { 713 /* special case 2 '..' */ 714 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 715 716 /* get our node */ 717 name = ".."; 718 namelen = 2; 719 error = udf_lookup_name_in_dir(dvp, name, namelen, 720 &icb_loc, &found); 721 if (error) 722 goto out; 723 if (!found) 724 error = ENOENT; 725 726 /* first unlock parent */ 727 VOP_UNLOCK(dvp, 0); 728 729 if (error == 0) { 730 DPRINTF(LOOKUP, ("\tfound '..'\n")); 731 /* try to create/reuse the node */ 732 error = udf_get_node(ump, &icb_loc, &res_node); 733 734 if (!error) { 735 DPRINTF(LOOKUP, 736 ("\tnode retrieved/created OK\n")); 737 *vpp = res_node->vnode; 738 } 739 } 740 741 /* try to relock parent */ 742 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 743 } else { 744 DPRINTF(LOOKUP, ("\tlookup file\n")); 745 /* all other files */ 746 /* lookup filename in the directory; location icb_loc */ 747 name = cnp->cn_nameptr; 748 namelen = cnp->cn_namelen; 749 error = udf_lookup_name_in_dir(dvp, name, namelen, 750 &icb_loc, &found); 751 if (error) 752 goto out; 753 if (!found) { 754 DPRINTF(LOOKUP, ("\tNOT found\n")); 755 /* 756 * UGH, didn't find name. If we're creating or 757 * renaming on the last name this is OK and we ought 758 * to return EJUSTRETURN if its allowed to be created. 759 */ 760 error = ENOENT; 761 if (islastcn && 762 (nameiop == CREATE || nameiop == RENAME)) 763 error = 0; 764 if (!error) { 765 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 766 if (!error) { 767 /* keep the component name */ 768 cnp->cn_flags |= SAVENAME; 769 error = EJUSTRETURN; 770 } 771 } 772 /* done */ 773 } else { 774 /* try to create/reuse the node */ 775 error = udf_get_node(ump, &icb_loc, &res_node); 776 if (!error) { 777 /* 778 * If we are not at the last path component 779 * and found a non-directory or non-link entry 780 * (which may itself be pointing to a 781 * directory), raise an error. 782 */ 783 vnodetp = res_node->vnode->v_type; 784 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 785 if (!islastcn) 786 error = ENOTDIR; 787 } 788 789 } 790 if (!error) { 791 *vpp = res_node->vnode; 792 } 793 } 794 } 795 796 out: 797 /* 798 * Store result in the cache if requested. If we are creating a file, 799 * the file might not be found and thus putting it into the namecache 800 * might be seen as negative caching. 801 */ 802 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 803 cache_enter(dvp, *vpp, cnp); 804 805 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 806 807 return error; 808 } 809 810 /* --------------------------------------------------------------------- */ 811 812 int 813 udf_getattr(void *v) 814 { 815 struct vop_getattr_args /* { 816 struct vnode *a_vp; 817 struct vattr *a_vap; 818 kauth_cred_t a_cred; 819 struct lwp *a_l; 820 } */ *ap = v; 821 struct vnode *vp = ap->a_vp; 822 struct udf_node *udf_node = VTOI(vp); 823 struct udf_mount *ump = udf_node->ump; 824 struct file_entry *fe = udf_node->fe; 825 struct extfile_entry *efe = udf_node->efe; 826 struct filetimes_extattr_entry *ft_extattr; 827 struct device_extattr_entry *devattr; 828 struct vattr *vap = ap->a_vap; 829 struct timestamp *atime, *mtime, *attrtime, *creatime; 830 uint64_t filesize, blkssize; 831 uint32_t nlink; 832 uint32_t offset, a_l; 833 uint8_t *filedata; 834 uid_t uid; 835 gid_t gid; 836 int error; 837 838 DPRINTF(CALL, ("udf_getattr called\n")); 839 840 /* update times before we returning values */ 841 udf_itimes(udf_node, NULL, NULL, NULL); 842 843 /* get descriptor information */ 844 if (fe) { 845 nlink = udf_rw16(fe->link_cnt); 846 uid = (uid_t)udf_rw32(fe->uid); 847 gid = (gid_t)udf_rw32(fe->gid); 848 filesize = udf_rw64(fe->inf_len); 849 blkssize = udf_rw64(fe->logblks_rec); 850 atime = &fe->atime; 851 mtime = &fe->mtime; 852 attrtime = &fe->attrtime; 853 filedata = fe->data; 854 855 /* initial guess */ 856 creatime = mtime; 857 858 /* check our extended attribute if present */ 859 error = udf_extattr_search_intern(udf_node, 860 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 861 if (!error) { 862 ft_extattr = (struct filetimes_extattr_entry *) 863 (filedata + offset); 864 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 865 creatime = &ft_extattr->times[0]; 866 } 867 } else { 868 assert(udf_node->efe); 869 nlink = udf_rw16(efe->link_cnt); 870 uid = (uid_t)udf_rw32(efe->uid); 871 gid = (gid_t)udf_rw32(efe->gid); 872 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 873 blkssize = udf_rw64(efe->logblks_rec); 874 atime = &efe->atime; 875 mtime = &efe->mtime; 876 attrtime = &efe->attrtime; 877 creatime = &efe->ctime; 878 filedata = efe->data; 879 } 880 881 /* do the uid/gid translation game */ 882 if (uid == (uid_t) -1) 883 uid = ump->mount_args.anon_uid; 884 if (gid == (gid_t) -1) 885 gid = ump->mount_args.anon_gid; 886 887 /* fill in struct vattr with values from the node */ 888 VATTR_NULL(vap); 889 vap->va_type = vp->v_type; 890 vap->va_mode = udf_getaccessmode(udf_node); 891 vap->va_nlink = nlink; 892 vap->va_uid = uid; 893 vap->va_gid = gid; 894 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 895 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 896 vap->va_size = filesize; 897 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 898 899 /* 900 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 901 * 1 to the link count if its a directory we're requested attributes 902 * of. 903 */ 904 if (vap->va_type == VDIR) 905 vap->va_nlink++; 906 907 /* access times */ 908 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 909 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 910 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 911 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 912 913 vap->va_gen = 1; /* no multiple generations yes (!?) */ 914 vap->va_flags = 0; /* no flags */ 915 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 916 vap->va_filerev = 1; /* TODO file revision numbers? */ 917 vap->va_vaflags = 0; 918 /* TODO get vaflags from the extended attributes? */ 919 920 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 921 error = udf_extattr_search_intern(udf_node, 922 UDF_DEVICESPEC_ATTR_NO, "", 923 &offset, &a_l); 924 /* if error, deny access */ 925 if (error || (filedata == NULL)) { 926 vap->va_mode = 0; /* or v_type = VNON? */ 927 } else { 928 devattr = (struct device_extattr_entry *) 929 filedata + offset; 930 vap->va_rdev = makedev( 931 udf_rw32(devattr->major), 932 udf_rw32(devattr->minor) 933 ); 934 /* TODO we could check the implementator */ 935 } 936 } 937 938 return 0; 939 } 940 941 /* --------------------------------------------------------------------- */ 942 943 static int 944 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 945 kauth_cred_t cred) 946 { 947 struct udf_node *udf_node = VTOI(vp); 948 uid_t uid; 949 gid_t gid; 950 int error; 951 952 #ifdef notyet 953 /* TODO get vaflags from the extended attributes? */ 954 /* Immutable or append-only files cannot be modified, either. */ 955 if (udf_node->flags & (IMMUTABLE | APPEND)) 956 return EPERM; 957 #endif 958 959 if (vp->v_mount->mnt_flag & MNT_RDONLY) 960 return EROFS; 961 962 /* retrieve old values */ 963 udf_getownership(udf_node, &uid, &gid); 964 965 /* only one could be specified */ 966 if (new_uid == VNOVAL) 967 new_uid = uid; 968 if (new_gid == VNOVAL) 969 new_gid = gid; 970 971 /* check if we can fit it in an 32 bits */ 972 if ((uid_t) ((uint32_t) new_uid) != new_uid) 973 return EINVAL; 974 if ((gid_t) ((uint32_t) new_gid) != new_gid) 975 return EINVAL; 976 977 /* check permissions */ 978 error = genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid); 979 if (error) 980 return (error); 981 982 /* change the ownership */ 983 udf_setownership(udf_node, new_uid, new_gid); 984 985 /* mark node changed */ 986 udf_node->i_flags |= IN_CHANGE; 987 988 return 0; 989 } 990 991 992 static int 993 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 994 { 995 struct udf_node *udf_node = VTOI(vp); 996 uid_t uid; 997 gid_t gid; 998 int error; 999 1000 #ifdef notyet 1001 /* TODO get vaflags from the extended attributes? */ 1002 /* Immutable or append-only files cannot be modified, either. */ 1003 if (udf_node->flags & (IMMUTABLE | APPEND)) 1004 return EPERM; 1005 #endif 1006 1007 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1008 return EROFS; 1009 1010 /* retrieve uid/gid values */ 1011 udf_getownership(udf_node, &uid, &gid); 1012 1013 /* check permissions */ 1014 error = genfs_can_chmod(vp, cred, uid, gid, mode); 1015 if (error) 1016 return (error); 1017 1018 /* change mode */ 1019 udf_setaccessmode(udf_node, mode); 1020 1021 /* mark node changed */ 1022 udf_node->i_flags |= IN_CHANGE; 1023 1024 return 0; 1025 } 1026 1027 1028 /* exported */ 1029 int 1030 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1031 { 1032 struct udf_node *udf_node = VTOI(vp); 1033 int error, extended; 1034 1035 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1036 return EROFS; 1037 1038 /* Decide whether this is a valid operation based on the file type. */ 1039 switch (vp->v_type) { 1040 case VDIR: 1041 return EISDIR; 1042 case VREG: 1043 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1044 return EROFS; 1045 break; 1046 case VBLK: 1047 /* FALLTHROUGH */ 1048 case VCHR: 1049 /* FALLTHROUGH */ 1050 case VFIFO: 1051 /* Allow modifications of special files even if in the file 1052 * system is mounted read-only (we are not modifying the 1053 * files themselves, but the objects they represent). */ 1054 return 0; 1055 default: 1056 /* Anything else is unsupported. */ 1057 return EOPNOTSUPP; 1058 } 1059 1060 #if notyet 1061 /* TODO get vaflags from the extended attributes? */ 1062 /* Immutable or append-only files cannot be modified, either. */ 1063 if (node->flags & (IMMUTABLE | APPEND)) 1064 return EPERM; 1065 #endif 1066 1067 /* resize file to the requested size */ 1068 error = udf_resize_node(udf_node, newsize, &extended); 1069 1070 if (error == 0) { 1071 /* mark change */ 1072 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1073 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1074 udf_update(vp, NULL, NULL, NULL, 0); 1075 } 1076 1077 return error; 1078 } 1079 1080 1081 static int 1082 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1083 { 1084 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1085 return EROFS; 1086 1087 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1088 1089 return 0; 1090 } 1091 1092 1093 static int 1094 udf_chtimes(struct vnode *vp, 1095 struct timespec *atime, struct timespec *mtime, 1096 struct timespec *birthtime, int setattrflags, 1097 kauth_cred_t cred) 1098 { 1099 struct udf_node *udf_node = VTOI(vp); 1100 uid_t uid; 1101 gid_t gid; 1102 int error; 1103 1104 #ifdef notyet 1105 /* TODO get vaflags from the extended attributes? */ 1106 /* Immutable or append-only files cannot be modified, either. */ 1107 if (udf_node->flags & (IMMUTABLE | APPEND)) 1108 return EPERM; 1109 #endif 1110 1111 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1112 return EROFS; 1113 1114 /* retrieve uid/gid values */ 1115 udf_getownership(udf_node, &uid, &gid); 1116 1117 /* check permissions */ 1118 error = genfs_can_chtimes(vp, setattrflags, uid, cred); 1119 if (error) 1120 return (error); 1121 1122 /* update node flags depending on what times are passed */ 1123 if (atime->tv_sec != VNOVAL) 1124 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1125 udf_node->i_flags |= IN_ACCESS; 1126 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1127 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1128 1129 return udf_update(vp, atime, mtime, birthtime, 0); 1130 } 1131 1132 1133 int 1134 udf_setattr(void *v) 1135 { 1136 struct vop_setattr_args /* { 1137 struct vnode *a_vp; 1138 struct vattr *a_vap; 1139 kauth_cred_t a_cred; 1140 struct lwp *a_l; 1141 } */ *ap = v; 1142 struct vnode *vp = ap->a_vp; 1143 /* struct udf_node *udf_node = VTOI(vp); */ 1144 /* struct udf_mount *ump = udf_node->ump; */ 1145 kauth_cred_t cred = ap->a_cred; 1146 struct vattr *vap = ap->a_vap; 1147 int error; 1148 1149 DPRINTF(CALL, ("udf_setattr called\n")); 1150 1151 /* Abort if any unsettable attribute is given. */ 1152 error = 0; 1153 if (vap->va_type != VNON || 1154 vap->va_nlink != VNOVAL || 1155 vap->va_fsid != VNOVAL || 1156 vap->va_fileid != VNOVAL || 1157 vap->va_blocksize != VNOVAL || 1158 #ifdef notyet 1159 /* checks are debated */ 1160 vap->va_ctime.tv_sec != VNOVAL || 1161 vap->va_ctime.tv_nsec != VNOVAL || 1162 vap->va_birthtime.tv_sec != VNOVAL || 1163 vap->va_birthtime.tv_nsec != VNOVAL || 1164 #endif 1165 vap->va_gen != VNOVAL || 1166 vap->va_rdev != VNOVAL || 1167 vap->va_bytes != VNOVAL) 1168 error = EINVAL; 1169 1170 DPRINTF(ATTR, ("setattr changing:\n")); 1171 if (error == 0 && (vap->va_flags != VNOVAL)) { 1172 DPRINTF(ATTR, ("\tchflags\n")); 1173 error = udf_chflags(vp, vap->va_flags, cred); 1174 } 1175 1176 if (error == 0 && (vap->va_size != VNOVAL)) { 1177 DPRINTF(ATTR, ("\tchsize\n")); 1178 error = udf_chsize(vp, vap->va_size, cred); 1179 } 1180 1181 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1182 DPRINTF(ATTR, ("\tchown\n")); 1183 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1184 } 1185 1186 if (error == 0 && (vap->va_mode != VNOVAL)) { 1187 DPRINTF(ATTR, ("\tchmod\n")); 1188 error = udf_chmod(vp, vap->va_mode, cred); 1189 } 1190 1191 if (error == 0 && 1192 ((vap->va_atime.tv_sec != VNOVAL && 1193 vap->va_atime.tv_nsec != VNOVAL) || 1194 (vap->va_mtime.tv_sec != VNOVAL && 1195 vap->va_mtime.tv_nsec != VNOVAL)) 1196 ) { 1197 DPRINTF(ATTR, ("\tchtimes\n")); 1198 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1199 &vap->va_birthtime, vap->va_vaflags, cred); 1200 } 1201 VN_KNOTE(vp, NOTE_ATTRIB); 1202 1203 return error; 1204 } 1205 1206 /* --------------------------------------------------------------------- */ 1207 1208 /* 1209 * Return POSIX pathconf information for UDF file systems. 1210 */ 1211 int 1212 udf_pathconf(void *v) 1213 { 1214 struct vop_pathconf_args /* { 1215 struct vnode *a_vp; 1216 int a_name; 1217 register_t *a_retval; 1218 } */ *ap = v; 1219 uint32_t bits; 1220 1221 DPRINTF(CALL, ("udf_pathconf called\n")); 1222 1223 switch (ap->a_name) { 1224 case _PC_LINK_MAX: 1225 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1226 return 0; 1227 case _PC_NAME_MAX: 1228 *ap->a_retval = NAME_MAX; 1229 return 0; 1230 case _PC_PATH_MAX: 1231 *ap->a_retval = PATH_MAX; 1232 return 0; 1233 case _PC_PIPE_BUF: 1234 *ap->a_retval = PIPE_BUF; 1235 return 0; 1236 case _PC_CHOWN_RESTRICTED: 1237 *ap->a_retval = 1; 1238 return 0; 1239 case _PC_NO_TRUNC: 1240 *ap->a_retval = 1; 1241 return 0; 1242 case _PC_SYNC_IO: 1243 *ap->a_retval = 0; /* synchronised is off for performance */ 1244 return 0; 1245 case _PC_FILESIZEBITS: 1246 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1247 bits = 64; /* XXX ought to deliver 65 */ 1248 #if 0 1249 if (udf_node) 1250 bits = 64 * vp->v_mount->mnt_dev_bshift; 1251 #endif 1252 *ap->a_retval = bits; 1253 return 0; 1254 } 1255 1256 return EINVAL; 1257 } 1258 1259 1260 /* --------------------------------------------------------------------- */ 1261 1262 int 1263 udf_open(void *v) 1264 { 1265 struct vop_open_args /* { 1266 struct vnode *a_vp; 1267 int a_mode; 1268 kauth_cred_t a_cred; 1269 struct proc *a_p; 1270 } */ *ap = v; 1271 int flags; 1272 1273 DPRINTF(CALL, ("udf_open called\n")); 1274 1275 /* 1276 * Files marked append-only must be opened for appending. 1277 * TODO: get chflags(2) flags from extened attribute. 1278 */ 1279 flags = 0; 1280 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1281 return (EPERM); 1282 1283 return 0; 1284 } 1285 1286 1287 /* --------------------------------------------------------------------- */ 1288 1289 int 1290 udf_close(void *v) 1291 { 1292 struct vop_close_args /* { 1293 struct vnode *a_vp; 1294 int a_fflag; 1295 kauth_cred_t a_cred; 1296 struct proc *a_p; 1297 } */ *ap = v; 1298 struct vnode *vp = ap->a_vp; 1299 struct udf_node *udf_node = VTOI(vp); 1300 1301 DPRINTF(CALL, ("udf_close called\n")); 1302 udf_node = udf_node; /* shut up gcc */ 1303 1304 mutex_enter(&vp->v_interlock); 1305 if (vp->v_usecount > 1) 1306 udf_itimes(udf_node, NULL, NULL, NULL); 1307 mutex_exit(&vp->v_interlock); 1308 1309 return 0; 1310 } 1311 1312 1313 /* --------------------------------------------------------------------- */ 1314 1315 static int 1316 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1317 { 1318 int flags; 1319 1320 /* check if we are allowed to write */ 1321 switch (vap->va_type) { 1322 case VDIR: 1323 case VLNK: 1324 case VREG: 1325 /* 1326 * normal nodes: check if we're on a read-only mounted 1327 * filingsystem and bomb out if we're trying to write. 1328 */ 1329 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1330 return EROFS; 1331 break; 1332 case VBLK: 1333 case VCHR: 1334 case VSOCK: 1335 case VFIFO: 1336 /* 1337 * special nodes: even on read-only mounted filingsystems 1338 * these are allowed to be written to if permissions allow. 1339 */ 1340 break; 1341 default: 1342 /* no idea what this is */ 1343 return EINVAL; 1344 } 1345 1346 /* noone may write immutable files */ 1347 /* TODO: get chflags(2) flags from extened attribute. */ 1348 flags = 0; 1349 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1350 return EPERM; 1351 1352 return 0; 1353 } 1354 1355 static int 1356 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1357 kauth_cred_t cred) 1358 { 1359 1360 /* ask the generic genfs_can_access to advice on security */ 1361 return genfs_can_access(vp->v_type, 1362 vap->va_mode, vap->va_uid, vap->va_gid, 1363 mode, cred); 1364 } 1365 1366 int 1367 udf_access(void *v) 1368 { 1369 struct vop_access_args /* { 1370 struct vnode *a_vp; 1371 int a_mode; 1372 kauth_cred_t a_cred; 1373 struct proc *a_p; 1374 } */ *ap = v; 1375 struct vnode *vp = ap->a_vp; 1376 mode_t mode = ap->a_mode; 1377 kauth_cred_t cred = ap->a_cred; 1378 /* struct udf_node *udf_node = VTOI(vp); */ 1379 struct vattr vap; 1380 int error; 1381 1382 DPRINTF(CALL, ("udf_access called\n")); 1383 1384 error = VOP_GETATTR(vp, &vap, NULL); 1385 if (error) 1386 return error; 1387 1388 error = udf_check_possible(vp, &vap, mode); 1389 if (error) 1390 return error; 1391 1392 error = udf_check_permitted(vp, &vap, mode, cred); 1393 1394 return error; 1395 } 1396 1397 /* --------------------------------------------------------------------- */ 1398 1399 int 1400 udf_create(void *v) 1401 { 1402 struct vop_create_args /* { 1403 struct vnode *a_dvp; 1404 struct vnode **a_vpp; 1405 struct componentname *a_cnp; 1406 struct vattr *a_vap; 1407 } */ *ap = v; 1408 struct vnode *dvp = ap->a_dvp; 1409 struct vnode **vpp = ap->a_vpp; 1410 struct vattr *vap = ap->a_vap; 1411 struct componentname *cnp = ap->a_cnp; 1412 int error; 1413 1414 DPRINTF(CALL, ("udf_create called\n")); 1415 error = udf_create_node(dvp, vpp, vap, cnp); 1416 1417 if (error || !(cnp->cn_flags & SAVESTART)) 1418 PNBUF_PUT(cnp->cn_pnbuf); 1419 vput(dvp); 1420 return error; 1421 } 1422 1423 /* --------------------------------------------------------------------- */ 1424 1425 int 1426 udf_mknod(void *v) 1427 { 1428 struct vop_mknod_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_mknod 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_mkdir(void *v) 1453 { 1454 struct vop_mkdir_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_mkdir 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 static int 1478 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1479 { 1480 struct udf_node *udf_node, *dir_node; 1481 struct vattr vap; 1482 int error; 1483 1484 DPRINTF(CALL, ("udf_link called\n")); 1485 error = 0; 1486 1487 /* some quick checks */ 1488 if (vp->v_type == VDIR) 1489 return EPERM; /* can't link a directory */ 1490 if (dvp->v_mount != vp->v_mount) 1491 return EXDEV; /* can't link across devices */ 1492 if (dvp == vp) 1493 return EPERM; /* can't be the same */ 1494 1495 /* lock node */ 1496 error = vn_lock(vp, LK_EXCLUSIVE); 1497 if (error) 1498 return error; 1499 1500 /* get attributes */ 1501 dir_node = VTOI(dvp); 1502 udf_node = VTOI(vp); 1503 1504 error = VOP_GETATTR(vp, &vap, FSCRED); 1505 if (error) 1506 return error; 1507 1508 /* check link count overflow */ 1509 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1510 return EMLINK; 1511 1512 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1513 } 1514 1515 int 1516 udf_link(void *v) 1517 { 1518 struct vop_link_args /* { 1519 struct vnode *a_dvp; 1520 struct vnode *a_vp; 1521 struct componentname *a_cnp; 1522 } */ *ap = v; 1523 struct vnode *dvp = ap->a_dvp; 1524 struct vnode *vp = ap->a_vp; 1525 struct componentname *cnp = ap->a_cnp; 1526 int error; 1527 1528 error = udf_do_link(dvp, vp, cnp); 1529 if (error) 1530 VOP_ABORTOP(dvp, cnp); 1531 1532 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1533 VOP_UNLOCK(vp, 0); 1534 1535 VN_KNOTE(vp, NOTE_LINK); 1536 VN_KNOTE(dvp, NOTE_WRITE); 1537 vput(dvp); 1538 1539 return error; 1540 } 1541 1542 /* --------------------------------------------------------------------- */ 1543 1544 static int 1545 udf_do_symlink(struct udf_node *udf_node, char *target) 1546 { 1547 struct pathcomp pathcomp; 1548 uint8_t *pathbuf, *pathpos, *compnamepos; 1549 char *mntonname; 1550 int pathlen, len, compnamelen, mntonnamelen; 1551 int error; 1552 1553 /* process `target' to an UDF structure */ 1554 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1555 pathpos = pathbuf; 1556 pathlen = 0; 1557 1558 if (*target == '/') { 1559 /* symlink starts from the root */ 1560 len = UDF_PATH_COMP_SIZE; 1561 memset(&pathcomp, 0, len); 1562 pathcomp.type = UDF_PATH_COMP_ROOT; 1563 1564 /* check if its mount-point relative! */ 1565 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1566 mntonnamelen = strlen(mntonname); 1567 if (strlen(target) >= mntonnamelen) { 1568 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1569 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1570 target += mntonnamelen; 1571 } 1572 } else { 1573 target++; 1574 } 1575 1576 memcpy(pathpos, &pathcomp, len); 1577 pathpos += len; 1578 pathlen += len; 1579 } 1580 1581 error = 0; 1582 while (*target) { 1583 /* ignore multiple '/' */ 1584 while (*target == '/') { 1585 target++; 1586 } 1587 if (!*target) 1588 break; 1589 1590 /* extract component name */ 1591 compnamelen = 0; 1592 compnamepos = target; 1593 while ((*target) && (*target != '/')) { 1594 target++; 1595 compnamelen++; 1596 } 1597 1598 /* just trunc if too long ?? (security issue) */ 1599 if (compnamelen >= 127) { 1600 error = ENAMETOOLONG; 1601 break; 1602 } 1603 1604 /* convert unix name to UDF name */ 1605 len = sizeof(struct pathcomp); 1606 memset(&pathcomp, 0, len); 1607 pathcomp.type = UDF_PATH_COMP_NAME; 1608 len = UDF_PATH_COMP_SIZE; 1609 1610 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1611 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1612 if ((compnamelen == 1) && (*compnamepos == '.')) 1613 pathcomp.type = UDF_PATH_COMP_CURDIR; 1614 1615 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1616 unix_to_udf_name( 1617 (char *) &pathcomp.ident, &pathcomp.l_ci, 1618 compnamepos, compnamelen, 1619 &udf_node->ump->logical_vol->desc_charset); 1620 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1621 } 1622 1623 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1624 error = ENAMETOOLONG; 1625 break; 1626 } 1627 1628 memcpy(pathpos, &pathcomp, len); 1629 pathpos += len; 1630 pathlen += len; 1631 } 1632 1633 if (error) { 1634 /* aparently too big */ 1635 free(pathbuf, M_UDFTEMP); 1636 return error; 1637 } 1638 1639 error = udf_grow_node(udf_node, pathlen); 1640 if (error) { 1641 /* failed to pregrow node */ 1642 free(pathbuf, M_UDFTEMP); 1643 return error; 1644 } 1645 1646 /* write out structure on the new file */ 1647 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1648 pathbuf, pathlen, 0, 1649 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1650 FSCRED, NULL, NULL); 1651 1652 /* return status of symlink contents writeout */ 1653 free(pathbuf, M_UDFTEMP); 1654 return error; 1655 } 1656 1657 1658 int 1659 udf_symlink(void *v) 1660 { 1661 struct vop_symlink_args /* { 1662 struct vnode *a_dvp; 1663 struct vnode **a_vpp; 1664 struct componentname *a_cnp; 1665 struct vattr *a_vap; 1666 char *a_target; 1667 } */ *ap = v; 1668 struct vnode *dvp = ap->a_dvp; 1669 struct vnode **vpp = ap->a_vpp; 1670 struct vattr *vap = ap->a_vap; 1671 struct componentname *cnp = ap->a_cnp; 1672 struct udf_node *dir_node; 1673 struct udf_node *udf_node; 1674 int error; 1675 1676 DPRINTF(CALL, ("udf_symlink called\n")); 1677 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1678 error = udf_create_node(dvp, vpp, vap, cnp); 1679 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1680 if (!error) { 1681 dir_node = VTOI(dvp); 1682 udf_node = VTOI(*vpp); 1683 KASSERT(udf_node); 1684 error = udf_do_symlink(udf_node, ap->a_target); 1685 if (error) { 1686 /* remove node */ 1687 udf_shrink_node(udf_node, 0); 1688 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1689 } 1690 } 1691 if (error || !(cnp->cn_flags & SAVESTART)) 1692 PNBUF_PUT(cnp->cn_pnbuf); 1693 vput(dvp); 1694 return error; 1695 } 1696 1697 /* --------------------------------------------------------------------- */ 1698 1699 int 1700 udf_readlink(void *v) 1701 { 1702 struct vop_readlink_args /* { 1703 struct vnode *a_vp; 1704 struct uio *a_uio; 1705 kauth_cred_t a_cred; 1706 } */ *ap = v; 1707 struct vnode *vp = ap->a_vp; 1708 struct uio *uio = ap->a_uio; 1709 kauth_cred_t cred = ap->a_cred; 1710 struct udf_node *udf_node; 1711 struct pathcomp pathcomp; 1712 struct vattr vattr; 1713 uint8_t *pathbuf, *targetbuf, *tmpname; 1714 uint8_t *pathpos, *targetpos; 1715 char *mntonname; 1716 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1717 int first, error; 1718 1719 DPRINTF(CALL, ("udf_readlink called\n")); 1720 1721 udf_node = VTOI(vp); 1722 error = VOP_GETATTR(vp, &vattr, cred); 1723 if (error) 1724 return error; 1725 1726 /* claim temporary buffers for translation */ 1727 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1728 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1729 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1730 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1731 memset(targetbuf, 0, PATH_MAX); 1732 1733 /* read contents of file in our temporary buffer */ 1734 error = vn_rdwr(UIO_READ, udf_node->vnode, 1735 pathbuf, vattr.va_size, 0, 1736 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1737 FSCRED, NULL, NULL); 1738 if (error) { 1739 /* failed to read in symlink contents */ 1740 free(pathbuf, M_UDFTEMP); 1741 free(targetbuf, M_UDFTEMP); 1742 free(tmpname, M_UDFTEMP); 1743 return error; 1744 } 1745 1746 /* convert to a unix path */ 1747 pathpos = pathbuf; 1748 pathlen = 0; 1749 targetpos = targetbuf; 1750 targetlen = PATH_MAX; 1751 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1752 mntonnamelen = strlen(mntonname); 1753 1754 error = 0; 1755 first = 1; 1756 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1757 len = UDF_PATH_COMP_SIZE; 1758 memcpy(&pathcomp, pathpos, len); 1759 l_ci = pathcomp.l_ci; 1760 switch (pathcomp.type) { 1761 case UDF_PATH_COMP_ROOT : 1762 /* XXX should check for l_ci; bugcompatible now */ 1763 if ((targetlen < 1) || !first) { 1764 error = EINVAL; 1765 break; 1766 } 1767 *targetpos++ = '/'; targetlen--; 1768 break; 1769 case UDF_PATH_COMP_MOUNTROOT : 1770 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1771 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1772 error = EINVAL; 1773 break; 1774 } 1775 memcpy(targetpos, mntonname, mntonnamelen); 1776 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1777 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1778 /* more follows, so must be directory */ 1779 *targetpos++ = '/'; targetlen--; 1780 } 1781 break; 1782 case UDF_PATH_COMP_PARENTDIR : 1783 /* XXX should check for l_ci; bugcompatible now */ 1784 if (targetlen < 3) { 1785 error = EINVAL; 1786 break; 1787 } 1788 *targetpos++ = '.'; targetlen--; 1789 *targetpos++ = '.'; targetlen--; 1790 *targetpos++ = '/'; targetlen--; 1791 break; 1792 case UDF_PATH_COMP_CURDIR : 1793 /* XXX should check for l_ci; bugcompatible now */ 1794 if (targetlen < 2) { 1795 error = EINVAL; 1796 break; 1797 } 1798 *targetpos++ = '.'; targetlen--; 1799 *targetpos++ = '/'; targetlen--; 1800 break; 1801 case UDF_PATH_COMP_NAME : 1802 if (l_ci == 0) { 1803 error = EINVAL; 1804 break; 1805 } 1806 memset(tmpname, 0, PATH_MAX); 1807 memcpy(&pathcomp, pathpos, len + l_ci); 1808 udf_to_unix_name(tmpname, MAXPATHLEN, 1809 pathcomp.ident, l_ci, 1810 &udf_node->ump->logical_vol->desc_charset); 1811 namelen = strlen(tmpname); 1812 if (targetlen < namelen + 1) { 1813 error = EINVAL; 1814 break; 1815 } 1816 memcpy(targetpos, tmpname, namelen); 1817 targetpos += namelen; targetlen -= namelen; 1818 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1819 /* more follows, so must be directory */ 1820 *targetpos++ = '/'; targetlen--; 1821 } 1822 break; 1823 default : 1824 error = EINVAL; 1825 break; 1826 } 1827 first = 0; 1828 if (error) 1829 break; 1830 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1831 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1832 1833 } 1834 /* all processed? */ 1835 if (vattr.va_size - pathlen > 0) 1836 error = EINVAL; 1837 1838 /* uiomove() to destination */ 1839 if (!error) 1840 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1841 1842 free(pathbuf, M_UDFTEMP); 1843 free(targetbuf, M_UDFTEMP); 1844 free(tmpname, M_UDFTEMP); 1845 1846 return error; 1847 } 1848 1849 /* --------------------------------------------------------------------- */ 1850 1851 /* 1852 * Check if source directory is in the path of the target directory. Target 1853 * is supplied locked, source is unlocked. The target is always vput before 1854 * returning. Modeled after UFS. 1855 * 1856 * If source is on the path from target to the root, return error. 1857 */ 1858 1859 static int 1860 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1861 { 1862 struct udf_mount *ump = target->ump; 1863 struct udf_node *res_node; 1864 struct long_ad icb_loc, *root_icb; 1865 const char *name; 1866 int namelen; 1867 int error, found; 1868 1869 name = ".."; 1870 namelen = 2; 1871 error = 0; 1872 res_node = target; 1873 1874 root_icb = &ump->fileset_desc->rootdir_icb; 1875 1876 /* if nodes are equal, it is no use looking */ 1877 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1878 error = EEXIST; 1879 goto out; 1880 } 1881 1882 /* nothing can exist before the root */ 1883 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1884 error = 0; 1885 goto out; 1886 } 1887 1888 for (;;) { 1889 DPRINTF(NODE, ("udf_on_rootpath : " 1890 "source vp %p, looking at vp %p\n", 1891 source->vnode, res_node->vnode)); 1892 1893 /* sanity check */ 1894 if (res_node->vnode->v_type != VDIR) { 1895 error = ENOTDIR; 1896 goto out; 1897 } 1898 1899 /* go down one level */ 1900 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1901 &icb_loc, &found); 1902 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1903 "found %d\n", error, found)); 1904 1905 if (!found) 1906 error = ENOENT; 1907 if (error) 1908 goto out; 1909 1910 /* did we encounter source node? */ 1911 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1912 error = EINVAL; 1913 goto out; 1914 } 1915 1916 /* did we encounter the root node? */ 1917 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1918 error = 0; 1919 goto out; 1920 } 1921 1922 /* push our intermediate node, we're done with it */ 1923 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1924 vput(res_node->vnode); 1925 1926 DPRINTF(NODE, ("\tgetting the .. node\n")); 1927 error = udf_get_node(ump, &icb_loc, &res_node); 1928 1929 if (error) { /* argh, bail out */ 1930 KASSERT(res_node == NULL); 1931 // res_node = NULL; 1932 goto out; 1933 } 1934 } 1935 out: 1936 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1937 1938 /* put our last node */ 1939 if (res_node) 1940 vput(res_node->vnode); 1941 1942 return error; 1943 } 1944 1945 /* note: i tried to follow the logics of the tmpfs rename code */ 1946 int 1947 udf_rename(void *v) 1948 { 1949 struct vop_rename_args /* { 1950 struct vnode *a_fdvp; 1951 struct vnode *a_fvp; 1952 struct componentname *a_fcnp; 1953 struct vnode *a_tdvp; 1954 struct vnode *a_tvp; 1955 struct componentname *a_tcnp; 1956 } */ *ap = v; 1957 struct vnode *tvp = ap->a_tvp; 1958 struct vnode *tdvp = ap->a_tdvp; 1959 struct vnode *fvp = ap->a_fvp; 1960 struct vnode *fdvp = ap->a_fdvp; 1961 struct componentname *tcnp = ap->a_tcnp; 1962 struct componentname *fcnp = ap->a_fcnp; 1963 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1964 struct vattr fvap, tvap; 1965 int error; 1966 1967 DPRINTF(CALL, ("udf_rename called\n")); 1968 1969 /* disallow cross-device renames */ 1970 if (fvp->v_mount != tdvp->v_mount || 1971 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1972 error = EXDEV; 1973 goto out_unlocked; 1974 } 1975 1976 fnode = VTOI(fvp); 1977 fdnode = VTOI(fdvp); 1978 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1979 tdnode = VTOI(tdvp); 1980 1981 /* lock our source dir */ 1982 if (fdnode != tdnode) { 1983 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1984 if (error != 0) 1985 goto out_unlocked; 1986 } 1987 1988 /* get info about the node to be moved */ 1989 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1990 KASSERT(error == 0); 1991 1992 /* check when to delete the old already existing entry */ 1993 if (tvp) { 1994 /* get info about the node to be moved to */ 1995 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1996 KASSERT(error == 0); 1997 1998 /* if both dirs, make sure the destination is empty */ 1999 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 2000 if (tvap.va_nlink > 2) { 2001 error = ENOTEMPTY; 2002 goto out; 2003 } 2004 } 2005 /* if moving dir, make sure destination is dir too */ 2006 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2007 error = ENOTDIR; 2008 goto out; 2009 } 2010 /* if we're moving a non-directory, make sure dest is no dir */ 2011 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2012 error = EISDIR; 2013 goto out; 2014 } 2015 } 2016 2017 /* check if moving a directory to a new parent is allowed */ 2018 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2019 /* release tvp since we might encounter it and lock up */ 2020 if (tvp) 2021 vput(tvp); 2022 2023 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2024 vref(tdvp); 2025 2026 /* search if fnode is a component of tdnode's path to root */ 2027 error = udf_on_rootpath(fnode, tdnode); 2028 2029 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2030 2031 if (error) { 2032 /* compensate for our vref earlier */ 2033 vrele(tdvp); 2034 goto out; 2035 } 2036 2037 /* relock tdvp; its still here due to the vref earlier */ 2038 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2039 2040 /* 2041 * re-lookup tvp since the parent has been unlocked, so could 2042 * have changed/removed in the meantime. 2043 */ 2044 tcnp->cn_flags &= ~SAVESTART; 2045 error = relookup(tdvp, &tvp, tcnp); 2046 if (error) { 2047 vput(tdvp); 2048 goto out; 2049 } 2050 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2051 } 2052 2053 /* remove existing entry if present */ 2054 if (tvp) 2055 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2056 2057 /* create new directory entry for the node */ 2058 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2059 if (error) 2060 goto out; 2061 2062 /* unlink old directory entry for the node, if failing, unattach new */ 2063 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2064 if (error) 2065 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2066 if (error) 2067 goto out; 2068 2069 /* update tnode's '..' if moving directory to new parent */ 2070 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2071 /* update fnode's '..' entry */ 2072 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2073 if (error) { 2074 /* 'try' to recover from this situation */ 2075 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2076 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2077 } 2078 } 2079 2080 out: 2081 if (fdnode != tdnode) 2082 VOP_UNLOCK(fdvp, 0); 2083 2084 out_unlocked: 2085 VOP_ABORTOP(tdvp, tcnp); 2086 if (tdvp == tvp) 2087 vrele(tdvp); 2088 else 2089 vput(tdvp); 2090 if (tvp) 2091 vput(tvp); 2092 VOP_ABORTOP(fdvp, fcnp); 2093 2094 /* release source nodes. */ 2095 vrele(fdvp); 2096 vrele(fvp); 2097 2098 return error; 2099 } 2100 2101 /* --------------------------------------------------------------------- */ 2102 2103 int 2104 udf_remove(void *v) 2105 { 2106 struct vop_remove_args /* { 2107 struct vnode *a_dvp; 2108 struct vnode *a_vp; 2109 struct componentname *a_cnp; 2110 } */ *ap = v; 2111 struct vnode *dvp = ap->a_dvp; 2112 struct vnode *vp = ap->a_vp; 2113 struct componentname *cnp = ap->a_cnp; 2114 struct udf_node *dir_node = VTOI(dvp);; 2115 struct udf_node *udf_node = VTOI(vp); 2116 struct udf_mount *ump = dir_node->ump; 2117 int error; 2118 2119 DPRINTF(CALL, ("udf_remove called\n")); 2120 if (vp->v_type != VDIR) { 2121 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2122 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2123 } else { 2124 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2125 error = EPERM; 2126 } 2127 2128 if (error == 0) { 2129 VN_KNOTE(vp, NOTE_DELETE); 2130 VN_KNOTE(dvp, NOTE_WRITE); 2131 } 2132 2133 if (dvp == vp) 2134 vrele(vp); 2135 else 2136 vput(vp); 2137 vput(dvp); 2138 2139 return error; 2140 } 2141 2142 /* --------------------------------------------------------------------- */ 2143 2144 int 2145 udf_rmdir(void *v) 2146 { 2147 struct vop_rmdir_args /* { 2148 struct vnode *a_dvp; 2149 struct vnode *a_vp; 2150 struct componentname *a_cnp; 2151 } */ *ap = v; 2152 struct vnode *vp = ap->a_vp; 2153 struct vnode *dvp = ap->a_dvp; 2154 struct componentname *cnp = ap->a_cnp; 2155 struct udf_node *dir_node = VTOI(dvp);; 2156 struct udf_node *udf_node = VTOI(vp); 2157 struct udf_mount *ump = dir_node->ump; 2158 int refcnt, error; 2159 2160 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2161 2162 /* don't allow '.' to be deleted */ 2163 if (dir_node == udf_node) { 2164 vrele(dvp); 2165 vput(vp); 2166 return EINVAL; 2167 } 2168 2169 /* check to see if the directory is empty */ 2170 error = 0; 2171 if (dir_node->fe) { 2172 refcnt = udf_rw16(udf_node->fe->link_cnt); 2173 } else { 2174 refcnt = udf_rw16(udf_node->efe->link_cnt); 2175 } 2176 if (refcnt > 1) { 2177 /* NOT empty */ 2178 vput(dvp); 2179 vput(vp); 2180 return ENOTEMPTY; 2181 } 2182 2183 /* detach the node from the directory */ 2184 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2185 if (error == 0) { 2186 cache_purge(vp); 2187 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2188 VN_KNOTE(vp, NOTE_DELETE); 2189 } 2190 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2191 2192 /* unput the nodes and exit */ 2193 vput(dvp); 2194 vput(vp); 2195 2196 return error; 2197 } 2198 2199 /* --------------------------------------------------------------------- */ 2200 2201 int 2202 udf_fsync(void *v) 2203 { 2204 struct vop_fsync_args /* { 2205 struct vnode *a_vp; 2206 kauth_cred_t a_cred; 2207 int a_flags; 2208 off_t offlo; 2209 off_t offhi; 2210 struct proc *a_p; 2211 } */ *ap = v; 2212 struct vnode *vp = ap->a_vp; 2213 struct udf_node *udf_node = VTOI(vp); 2214 int error, flags, wait; 2215 2216 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2217 udf_node, 2218 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2219 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2220 2221 /* flush data and wait for it when requested */ 2222 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2223 vflushbuf(vp, wait); 2224 2225 if (udf_node == NULL) { 2226 printf("udf_fsync() called on NULL udf_node!\n"); 2227 return 0; 2228 } 2229 if (vp->v_tag != VT_UDF) { 2230 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2231 return 0; 2232 } 2233 2234 /* set our times */ 2235 udf_itimes(udf_node, NULL, NULL, NULL); 2236 2237 /* if called when mounted readonly, never write back */ 2238 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2239 return 0; 2240 2241 /* if only data is requested, return */ 2242 if (ap->a_flags & FSYNC_DATAONLY) 2243 return 0; 2244 2245 /* check if the node is dirty 'enough'*/ 2246 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2247 if (flags == 0) 2248 return 0; 2249 2250 /* if we don't have to wait, check for IO pending */ 2251 if (!wait) { 2252 if (vp->v_numoutput > 0) { 2253 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2254 return 0; 2255 } 2256 if (udf_node->outstanding_bufs > 0) { 2257 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2258 return 0; 2259 } 2260 if (udf_node->outstanding_nodedscr > 0) { 2261 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2262 return 0; 2263 } 2264 } 2265 2266 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2267 if (wait) { 2268 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2269 mutex_enter(&vp->v_interlock); 2270 while (vp->v_numoutput) { 2271 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2272 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2273 } 2274 mutex_exit(&vp->v_interlock); 2275 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2276 } 2277 2278 /* write out node and wait for it if requested */ 2279 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2280 error = udf_writeout_node(udf_node, wait); 2281 if (error) 2282 return error; 2283 2284 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2285 2286 return 0; 2287 } 2288 2289 /* --------------------------------------------------------------------- */ 2290 2291 int 2292 udf_advlock(void *v) 2293 { 2294 struct vop_advlock_args /* { 2295 struct vnode *a_vp; 2296 void *a_id; 2297 int a_op; 2298 struct flock *a_fl; 2299 int a_flags; 2300 } */ *ap = v; 2301 struct vnode *vp = ap->a_vp; 2302 struct udf_node *udf_node = VTOI(vp); 2303 struct file_entry *fe; 2304 struct extfile_entry *efe; 2305 uint64_t file_size; 2306 2307 DPRINTF(LOCKING, ("udf_advlock called\n")); 2308 2309 /* get directory filesize */ 2310 if (udf_node->fe) { 2311 fe = udf_node->fe; 2312 file_size = udf_rw64(fe->inf_len); 2313 } else { 2314 assert(udf_node->efe); 2315 efe = udf_node->efe; 2316 file_size = udf_rw64(efe->inf_len); 2317 } 2318 2319 return lf_advlock(ap, &udf_node->lockf, file_size); 2320 } 2321 2322 /* --------------------------------------------------------------------- */ 2323 2324 /* Global vfs vnode data structures for udfs */ 2325 int (**udf_vnodeop_p)(void *); 2326 2327 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2328 { &vop_default_desc, vn_default_error }, 2329 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2330 { &vop_create_desc, udf_create }, /* create */ 2331 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2332 { &vop_open_desc, udf_open }, /* open */ 2333 { &vop_close_desc, udf_close }, /* close */ 2334 { &vop_access_desc, udf_access }, /* access */ 2335 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2336 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2337 { &vop_read_desc, udf_read }, /* read */ 2338 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2339 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2340 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2341 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2342 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2343 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2344 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2345 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2346 { &vop_seek_desc, genfs_seek }, /* seek */ 2347 { &vop_remove_desc, udf_remove }, /* remove */ 2348 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2349 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2350 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2351 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2352 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2353 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2354 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2355 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2356 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2357 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2358 { &vop_lock_desc, genfs_lock }, /* lock */ 2359 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2360 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2361 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2362 /* { &vop_print_desc, udf_print }, */ /* print */ 2363 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2364 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2365 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2366 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2367 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2368 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2369 { NULL, NULL } 2370 }; 2371 2372 2373 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2374 &udf_vnodeop_p, udf_vnodeop_entries 2375 }; 2376 2377