1 /* $NetBSD: udf_vnops.c,v 1.70 2012/03/13 18:40:51 elad 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 1.70 2012/03/13 18:40:51 elad 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); 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); 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); 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 /* 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 int error; 190 191 /* 192 * XXX reading from extended attributes not yet implemented. FreeBSD 193 * has it in mind to forward the IO_EXT read call to the 194 * VOP_READEXTATTR(). 195 */ 196 197 DPRINTF(READ, ("udf_read called\n")); 198 199 /* can this happen? some filingsystems have this check */ 200 if (uio->uio_offset < 0) 201 return EINVAL; 202 if (uio->uio_resid == 0) 203 return 0; 204 205 /* protect against rogue programs reading raw directories and links */ 206 if ((ioflag & IO_ALTSEMANTICS) == 0) { 207 if (vp->v_type == VDIR) 208 return EISDIR; 209 /* all but regular files just give EINVAL */ 210 if (vp->v_type != VREG) 211 return EINVAL; 212 } 213 214 assert(udf_node); 215 assert(udf_node->fe || udf_node->efe); 216 217 /* get file/directory filesize */ 218 if (udf_node->fe) { 219 fe = udf_node->fe; 220 file_size = udf_rw64(fe->inf_len); 221 } else { 222 assert(udf_node->efe); 223 efe = udf_node->efe; 224 file_size = udf_rw64(efe->inf_len); 225 } 226 227 /* read contents using buffercache */ 228 uobj = &vp->v_uobj; 229 error = 0; 230 while (uio->uio_resid > 0) { 231 /* reached end? */ 232 if (file_size <= uio->uio_offset) 233 break; 234 235 /* maximise length to file extremity */ 236 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 237 if (len == 0) 238 break; 239 240 /* ubc, here we come, prepare to trap */ 241 error = ubc_uiomove(uobj, uio, len, advice, 242 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 243 if (error) 244 break; 245 } 246 247 /* note access time unless not requested */ 248 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 249 udf_node->i_flags |= IN_ACCESS; 250 if ((ioflag & IO_SYNC) == IO_SYNC) 251 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 252 } 253 254 return error; 255 } 256 257 /* --------------------------------------------------------------------- */ 258 259 int 260 udf_write(void *v) 261 { 262 struct vop_write_args /* { 263 struct vnode *a_vp; 264 struct uio *a_uio; 265 int a_ioflag; 266 kauth_cred_t a_cred; 267 } */ *ap = v; 268 struct vnode *vp = ap->a_vp; 269 struct uio *uio = ap->a_uio; 270 int ioflag = ap->a_ioflag; 271 kauth_cred_t cred = ap->a_cred; 272 int advice = IO_ADV_DECODE(ap->a_ioflag); 273 struct uvm_object *uobj; 274 struct udf_node *udf_node = VTOI(vp); 275 struct file_entry *fe; 276 struct extfile_entry *efe; 277 uint64_t file_size, old_size, old_offset; 278 vsize_t len; 279 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 280 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 281 int error; 282 int resid, extended; 283 284 /* 285 * XXX writing to extended attributes not yet implemented. FreeBSD has 286 * it in mind to forward the IO_EXT read call to the 287 * VOP_READEXTATTR(). 288 */ 289 290 DPRINTF(WRITE, ("udf_write called\n")); 291 292 /* can this happen? some filingsystems have this check */ 293 if (uio->uio_offset < 0) 294 return EINVAL; 295 if (uio->uio_resid == 0) 296 return 0; 297 298 /* protect against rogue programs writing raw directories or links */ 299 if ((ioflag & IO_ALTSEMANTICS) == 0) { 300 if (vp->v_type == VDIR) 301 return EISDIR; 302 /* all but regular files just give EINVAL for now */ 303 if (vp->v_type != VREG) 304 return EINVAL; 305 } 306 307 assert(udf_node); 308 assert(udf_node->fe || udf_node->efe); 309 310 /* get file/directory filesize */ 311 if (udf_node->fe) { 312 fe = udf_node->fe; 313 file_size = udf_rw64(fe->inf_len); 314 } else { 315 assert(udf_node->efe); 316 efe = udf_node->efe; 317 file_size = udf_rw64(efe->inf_len); 318 } 319 old_size = file_size; 320 321 /* if explicitly asked to append, uio_offset can be wrong? */ 322 if (ioflag & IO_APPEND) 323 uio->uio_offset = file_size; 324 325 extended = (uio->uio_offset + uio->uio_resid > file_size); 326 if (extended) { 327 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 328 file_size, uio->uio_offset + uio->uio_resid)); 329 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 330 if (error) 331 return error; 332 file_size = uio->uio_offset + uio->uio_resid; 333 } 334 335 /* write contents using buffercache */ 336 uobj = &vp->v_uobj; 337 resid = uio->uio_resid; 338 error = 0; 339 340 uvm_vnp_setwritesize(vp, file_size); 341 old_offset = uio->uio_offset; 342 while (uio->uio_resid > 0) { 343 /* maximise length to file extremity */ 344 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 345 if (len == 0) 346 break; 347 348 genfs_node_wrlock(vp); 349 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 350 genfs_node_unlock(vp); 351 if (error) 352 break; 353 354 /* ubc, here we come, prepare to trap */ 355 error = ubc_uiomove(uobj, uio, len, advice, 356 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 357 if (error) 358 break; 359 360 /* 361 * flush what we just wrote if necessary. 362 * XXXUBC simplistic async flushing. 363 * 364 * Directories are excluded since its file data that we want 365 * to purge. 366 */ 367 if (!async && (vp->v_type != VDIR) && 368 (old_offset >> 16 != uio->uio_offset >> 16)) { 369 mutex_enter(vp->v_interlock); 370 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 371 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 372 old_offset = uio->uio_offset; 373 } 374 } 375 uvm_vnp_setsize(vp, file_size); 376 377 /* mark node changed and request update */ 378 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 379 if (vp->v_mount->mnt_flag & MNT_RELATIME) 380 udf_node->i_flags |= IN_ACCESS; 381 382 /* 383 * XXX TODO FFS has code here to reset setuid & setgid when we're not 384 * the superuser as a precaution against tampering. 385 */ 386 387 /* if we wrote a thing, note write action on vnode */ 388 if (resid > uio->uio_resid) 389 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 390 391 if (error) { 392 /* bring back file size to its former size */ 393 /* take notice of its errors? */ 394 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 395 396 /* roll back uio */ 397 uio->uio_offset -= resid - uio->uio_resid; 398 uio->uio_resid = resid; 399 } else { 400 /* if we write and we're synchronous, update node */ 401 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 402 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 403 } 404 405 return error; 406 } 407 408 409 /* --------------------------------------------------------------------- */ 410 411 /* 412 * `Special' bmap functionality that translates all incomming requests to 413 * translate to vop_strategy() calls with the same blocknumbers effectively 414 * not translating at all. 415 */ 416 417 int 418 udf_trivial_bmap(void *v) 419 { 420 struct vop_bmap_args /* { 421 struct vnode *a_vp; 422 daddr_t a_bn; 423 struct vnode **a_vpp; 424 daddr_t *a_bnp; 425 int *a_runp; 426 } */ *ap = v; 427 struct vnode *vp = ap->a_vp; /* our node */ 428 struct vnode **vpp = ap->a_vpp; /* return node */ 429 daddr_t *bnp = ap->a_bnp; /* translated */ 430 daddr_t bn = ap->a_bn; /* origional */ 431 int *runp = ap->a_runp; 432 struct udf_node *udf_node = VTOI(vp); 433 uint32_t lb_size; 434 435 /* get logical block size */ 436 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 437 438 /* could return `-1' to indicate holes/zeros */ 439 /* translate 1:1 */ 440 *bnp = bn; 441 442 /* set the vnode to read the data from with strategy on itself */ 443 if (vpp) 444 *vpp = vp; 445 446 /* set runlength of maximum block size */ 447 if (runp) 448 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 449 450 /* return success */ 451 return 0; 452 } 453 454 /* --------------------------------------------------------------------- */ 455 456 int 457 udf_vfsstrategy(void *v) 458 { 459 struct vop_strategy_args /* { 460 struct vnode *a_vp; 461 struct buf *a_bp; 462 } */ *ap = v; 463 struct vnode *vp = ap->a_vp; 464 struct buf *bp = ap->a_bp; 465 struct udf_node *udf_node = VTOI(vp); 466 uint32_t lb_size, from, sectors; 467 int error; 468 469 DPRINTF(STRATEGY, ("udf_strategy called\n")); 470 471 /* check if we ought to be here */ 472 if (vp->v_type == VBLK || vp->v_type == VCHR) 473 panic("udf_strategy: spec"); 474 475 /* only filebuffers ought to be read/write by this, no descriptors */ 476 assert(bp->b_blkno >= 0); 477 478 /* get sector size */ 479 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 480 481 /* calculate sector to start from */ 482 from = bp->b_blkno; 483 484 /* calculate length to fetch/store in sectors */ 485 sectors = bp->b_bcount / lb_size; 486 assert(bp->b_bcount > 0); 487 488 /* NEVER assume later that this buffer is already translated */ 489 /* bp->b_lblkno = bp->b_blkno; */ 490 491 /* check assertions: we OUGHT to always get multiples of this */ 492 assert(sectors * lb_size == bp->b_bcount); 493 494 /* issue buffer */ 495 error = 0; 496 if (bp->b_flags & B_READ) { 497 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 498 ", sector %d for %d sectors\n", 499 vp, bp, bp->b_blkno, from, sectors)); 500 501 /* read buffer from the udf_node, translate vtop on the way*/ 502 udf_read_filebuf(udf_node, bp); 503 } else { 504 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 505 ", sector %d for %d sectors\n", 506 vp, bp, bp->b_blkno, from, sectors)); 507 508 /* write buffer to the udf_node, translate vtop on the way*/ 509 udf_write_filebuf(udf_node, bp); 510 } 511 512 return bp->b_error; 513 } 514 515 /* --------------------------------------------------------------------- */ 516 517 int 518 udf_readdir(void *v) 519 { 520 struct vop_readdir_args /* { 521 struct vnode *a_vp; 522 struct uio *a_uio; 523 kauth_cred_t a_cred; 524 int *a_eofflag; 525 off_t **a_cookies; 526 int *a_ncookies; 527 } */ *ap = v; 528 struct uio *uio = ap->a_uio; 529 struct vnode *vp = ap->a_vp; 530 struct udf_node *udf_node = VTOI(vp); 531 struct file_entry *fe; 532 struct extfile_entry *efe; 533 struct fileid_desc *fid; 534 struct dirent *dirent; 535 uint64_t file_size, diroffset, transoffset; 536 uint32_t lb_size; 537 int error; 538 539 DPRINTF(READDIR, ("udf_readdir called\n")); 540 541 /* This operation only makes sense on directory nodes. */ 542 if (vp->v_type != VDIR) 543 return ENOTDIR; 544 545 /* get directory filesize */ 546 if (udf_node->fe) { 547 fe = udf_node->fe; 548 file_size = udf_rw64(fe->inf_len); 549 } else { 550 assert(udf_node->efe); 551 efe = udf_node->efe; 552 file_size = udf_rw64(efe->inf_len); 553 } 554 555 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 556 557 /* 558 * Add `.' pseudo entry if at offset zero since its not in the fid 559 * stream 560 */ 561 if (uio->uio_offset == 0) { 562 DPRINTF(READDIR, ("\t'.' inserted\n")); 563 strcpy(dirent->d_name, "."); 564 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 565 dirent->d_type = DT_DIR; 566 dirent->d_namlen = strlen(dirent->d_name); 567 dirent->d_reclen = _DIRENT_SIZE(dirent); 568 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 569 570 /* mark with magic value that we have done the dummy */ 571 uio->uio_offset = UDF_DIRCOOKIE_DOT; 572 } 573 574 /* we are called just as long as we keep on pushing data in */ 575 error = 0; 576 if (uio->uio_offset < file_size) { 577 /* allocate temporary space for fid */ 578 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 579 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 580 581 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 582 uio->uio_offset = 0; 583 584 diroffset = uio->uio_offset; 585 transoffset = diroffset; 586 while (diroffset < file_size) { 587 DPRINTF(READDIR, ("\tread in fid stream\n")); 588 /* transfer a new fid/dirent */ 589 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 590 DPRINTFIF(READDIR, error, ("read error in read fid " 591 "stream : %d\n", error)); 592 if (error) 593 break; 594 595 /* 596 * If there isn't enough space in the uio to return a 597 * whole dirent, break off read 598 */ 599 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 600 break; 601 602 /* remember the last entry we transfered */ 603 transoffset = diroffset; 604 605 /* skip deleted entries */ 606 if (fid->file_char & UDF_FILE_CHAR_DEL) 607 continue; 608 609 /* skip not visible files */ 610 if (fid->file_char & UDF_FILE_CHAR_VIS) 611 continue; 612 613 /* copy dirent to the caller */ 614 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 615 dirent->d_name, dirent->d_type)); 616 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 617 } 618 619 /* pass on last transfered offset */ 620 uio->uio_offset = transoffset; 621 free(fid, M_UDFTEMP); 622 } 623 624 if (ap->a_eofflag) 625 *ap->a_eofflag = (uio->uio_offset >= file_size); 626 627 #ifdef DEBUG 628 if (udf_verbose & UDF_DEBUG_READDIR) { 629 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 630 if (ap->a_eofflag) 631 printf("returning EOF ? %d\n", *ap->a_eofflag); 632 if (error) 633 printf("readdir returning error %d\n", error); 634 } 635 #endif 636 637 free(dirent, M_UDFTEMP); 638 return error; 639 } 640 641 /* --------------------------------------------------------------------- */ 642 643 int 644 udf_lookup(void *v) 645 { 646 struct vop_lookup_args /* { 647 struct vnode *a_dvp; 648 struct vnode **a_vpp; 649 struct componentname *a_cnp; 650 } */ *ap = v; 651 struct vnode *dvp = ap->a_dvp; 652 struct vnode **vpp = ap->a_vpp; 653 struct componentname *cnp = ap->a_cnp; 654 struct udf_node *dir_node, *res_node; 655 struct udf_mount *ump; 656 struct long_ad icb_loc; 657 const char *name; 658 int namelen, nameiop, islastcn, mounted_ro; 659 int vnodetp; 660 int error, found; 661 662 dir_node = VTOI(dvp); 663 ump = dir_node->ump; 664 *vpp = NULL; 665 666 DPRINTF(LOOKUP, ("udf_lookup called\n")); 667 668 /* simplify/clarification flags */ 669 nameiop = cnp->cn_nameiop; 670 islastcn = cnp->cn_flags & ISLASTCN; 671 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 672 673 /* check exec/dirread permissions first */ 674 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 675 if (error) 676 return error; 677 678 DPRINTF(LOOKUP, ("\taccess ok\n")); 679 680 /* 681 * If requesting a modify on the last path element on a read-only 682 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 683 */ 684 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 685 return EROFS; 686 687 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 688 cnp->cn_nameptr)); 689 /* look in the nami cache; returns 0 on success!! */ 690 error = cache_lookup(dvp, vpp, cnp); 691 if (error >= 0) 692 return error; 693 694 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 695 696 /* 697 * Obviously, the file is not (anymore) in the namecache, we have to 698 * search for it. There are three basic cases: '.', '..' and others. 699 * 700 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 701 */ 702 error = 0; 703 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 704 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 705 /* special case 1 '.' */ 706 vref(dvp); 707 *vpp = dvp; 708 /* done */ 709 } else if (cnp->cn_flags & ISDOTDOT) { 710 /* special case 2 '..' */ 711 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 712 713 /* get our node */ 714 name = ".."; 715 namelen = 2; 716 error = udf_lookup_name_in_dir(dvp, name, namelen, 717 &icb_loc, &found); 718 if (error) 719 goto out; 720 if (!found) 721 error = ENOENT; 722 723 /* first unlock parent */ 724 VOP_UNLOCK(dvp); 725 726 if (error == 0) { 727 DPRINTF(LOOKUP, ("\tfound '..'\n")); 728 /* try to create/reuse the node */ 729 error = udf_get_node(ump, &icb_loc, &res_node); 730 731 if (!error) { 732 DPRINTF(LOOKUP, 733 ("\tnode retrieved/created OK\n")); 734 *vpp = res_node->vnode; 735 } 736 } 737 738 /* try to relock parent */ 739 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 740 } else { 741 DPRINTF(LOOKUP, ("\tlookup file\n")); 742 /* all other files */ 743 /* lookup filename in the directory; location icb_loc */ 744 name = cnp->cn_nameptr; 745 namelen = cnp->cn_namelen; 746 error = udf_lookup_name_in_dir(dvp, name, namelen, 747 &icb_loc, &found); 748 if (error) 749 goto out; 750 if (!found) { 751 DPRINTF(LOOKUP, ("\tNOT found\n")); 752 /* 753 * UGH, didn't find name. If we're creating or 754 * renaming on the last name this is OK and we ought 755 * to return EJUSTRETURN if its allowed to be created. 756 */ 757 error = ENOENT; 758 if (islastcn && 759 (nameiop == CREATE || nameiop == RENAME)) 760 error = 0; 761 if (!error) { 762 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 763 if (!error) { 764 error = EJUSTRETURN; 765 } 766 } 767 /* done */ 768 } else { 769 /* try to create/reuse the node */ 770 error = udf_get_node(ump, &icb_loc, &res_node); 771 if (!error) { 772 /* 773 * If we are not at the last path component 774 * and found a non-directory or non-link entry 775 * (which may itself be pointing to a 776 * directory), raise an error. 777 */ 778 vnodetp = res_node->vnode->v_type; 779 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 780 if (!islastcn) 781 error = ENOTDIR; 782 } 783 784 } 785 if (!error) { 786 *vpp = res_node->vnode; 787 } 788 } 789 } 790 791 out: 792 /* 793 * Store result in the cache if requested. If we are creating a file, 794 * the file might not be found and thus putting it into the namecache 795 * might be seen as negative caching. 796 */ 797 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 798 cache_enter(dvp, *vpp, cnp); 799 800 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 801 802 return error; 803 } 804 805 /* --------------------------------------------------------------------- */ 806 807 int 808 udf_getattr(void *v) 809 { 810 struct vop_getattr_args /* { 811 struct vnode *a_vp; 812 struct vattr *a_vap; 813 kauth_cred_t a_cred; 814 struct lwp *a_l; 815 } */ *ap = v; 816 struct vnode *vp = ap->a_vp; 817 struct udf_node *udf_node = VTOI(vp); 818 struct udf_mount *ump = udf_node->ump; 819 struct file_entry *fe = udf_node->fe; 820 struct extfile_entry *efe = udf_node->efe; 821 struct filetimes_extattr_entry *ft_extattr; 822 struct device_extattr_entry *devattr; 823 struct vattr *vap = ap->a_vap; 824 struct timestamp *atime, *mtime, *attrtime, *creatime; 825 uint64_t filesize, blkssize; 826 uint32_t nlink; 827 uint32_t offset, a_l; 828 uint8_t *filedata; 829 uid_t uid; 830 gid_t gid; 831 int error; 832 833 DPRINTF(CALL, ("udf_getattr called\n")); 834 835 /* update times before we returning values */ 836 udf_itimes(udf_node, NULL, NULL, NULL); 837 838 /* get descriptor information */ 839 if (fe) { 840 nlink = udf_rw16(fe->link_cnt); 841 uid = (uid_t)udf_rw32(fe->uid); 842 gid = (gid_t)udf_rw32(fe->gid); 843 filesize = udf_rw64(fe->inf_len); 844 blkssize = udf_rw64(fe->logblks_rec); 845 atime = &fe->atime; 846 mtime = &fe->mtime; 847 attrtime = &fe->attrtime; 848 filedata = fe->data; 849 850 /* initial guess */ 851 creatime = mtime; 852 853 /* check our extended attribute if present */ 854 error = udf_extattr_search_intern(udf_node, 855 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 856 if (!error) { 857 ft_extattr = (struct filetimes_extattr_entry *) 858 (filedata + offset); 859 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 860 creatime = &ft_extattr->times[0]; 861 } 862 } else { 863 assert(udf_node->efe); 864 nlink = udf_rw16(efe->link_cnt); 865 uid = (uid_t)udf_rw32(efe->uid); 866 gid = (gid_t)udf_rw32(efe->gid); 867 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 868 blkssize = udf_rw64(efe->logblks_rec); 869 atime = &efe->atime; 870 mtime = &efe->mtime; 871 attrtime = &efe->attrtime; 872 creatime = &efe->ctime; 873 filedata = efe->data; 874 } 875 876 /* do the uid/gid translation game */ 877 if (uid == (uid_t) -1) 878 uid = ump->mount_args.anon_uid; 879 if (gid == (gid_t) -1) 880 gid = ump->mount_args.anon_gid; 881 882 /* fill in struct vattr with values from the node */ 883 vattr_null(vap); 884 vap->va_type = vp->v_type; 885 vap->va_mode = udf_getaccessmode(udf_node); 886 vap->va_nlink = nlink; 887 vap->va_uid = uid; 888 vap->va_gid = gid; 889 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 890 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 891 vap->va_size = filesize; 892 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 893 894 /* 895 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 896 * 1 to the link count if its a directory we're requested attributes 897 * of. 898 */ 899 if (vap->va_type == VDIR) 900 vap->va_nlink++; 901 902 /* access times */ 903 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 904 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 905 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 906 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 907 908 vap->va_gen = 1; /* no multiple generations yes (!?) */ 909 vap->va_flags = 0; /* no flags */ 910 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 911 vap->va_filerev = 1; /* TODO file revision numbers? */ 912 vap->va_vaflags = 0; 913 /* TODO get vaflags from the extended attributes? */ 914 915 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 916 error = udf_extattr_search_intern(udf_node, 917 UDF_DEVICESPEC_ATTR_NO, "", 918 &offset, &a_l); 919 /* if error, deny access */ 920 if (error || (filedata == NULL)) { 921 vap->va_mode = 0; /* or v_type = VNON? */ 922 } else { 923 devattr = (struct device_extattr_entry *) 924 filedata + offset; 925 vap->va_rdev = makedev( 926 udf_rw32(devattr->major), 927 udf_rw32(devattr->minor) 928 ); 929 /* TODO we could check the implementator */ 930 } 931 } 932 933 return 0; 934 } 935 936 /* --------------------------------------------------------------------- */ 937 938 static int 939 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 940 kauth_cred_t cred) 941 { 942 struct udf_node *udf_node = VTOI(vp); 943 uid_t uid; 944 gid_t gid; 945 int error; 946 947 #ifdef notyet 948 /* TODO get vaflags from the extended attributes? */ 949 /* Immutable or append-only files cannot be modified, either. */ 950 if (udf_node->flags & (IMMUTABLE | APPEND)) 951 return EPERM; 952 #endif 953 954 if (vp->v_mount->mnt_flag & MNT_RDONLY) 955 return EROFS; 956 957 /* retrieve old values */ 958 udf_getownership(udf_node, &uid, &gid); 959 960 /* only one could be specified */ 961 if (new_uid == VNOVAL) 962 new_uid = uid; 963 if (new_gid == VNOVAL) 964 new_gid = gid; 965 966 /* check if we can fit it in an 32 bits */ 967 if ((uid_t) ((uint32_t) new_uid) != new_uid) 968 return EINVAL; 969 if ((gid_t) ((uint32_t) new_gid) != new_gid) 970 return EINVAL; 971 972 /* check permissions */ 973 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 974 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 975 if (error) 976 return (error); 977 978 /* change the ownership */ 979 udf_setownership(udf_node, new_uid, new_gid); 980 981 /* mark node changed */ 982 udf_node->i_flags |= IN_CHANGE; 983 if (vp->v_mount->mnt_flag & MNT_RELATIME) 984 udf_node->i_flags |= IN_ACCESS; 985 986 return 0; 987 } 988 989 990 static int 991 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 992 { 993 struct udf_node *udf_node = VTOI(vp); 994 uid_t uid; 995 gid_t gid; 996 int error; 997 998 #ifdef notyet 999 /* TODO get vaflags from the extended attributes? */ 1000 /* Immutable or append-only files cannot be modified, either. */ 1001 if (udf_node->flags & (IMMUTABLE | APPEND)) 1002 return EPERM; 1003 #endif 1004 1005 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1006 return EROFS; 1007 1008 /* retrieve uid/gid values */ 1009 udf_getownership(udf_node, &uid, &gid); 1010 1011 /* check permissions */ 1012 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1013 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1014 if (error) 1015 return (error); 1016 1017 /* change mode */ 1018 udf_setaccessmode(udf_node, mode); 1019 1020 /* mark node changed */ 1021 udf_node->i_flags |= IN_CHANGE; 1022 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1023 udf_node->i_flags |= IN_ACCESS; 1024 1025 return 0; 1026 } 1027 1028 1029 /* exported */ 1030 int 1031 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1032 { 1033 struct udf_node *udf_node = VTOI(vp); 1034 int error, extended; 1035 1036 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1037 return EROFS; 1038 1039 /* Decide whether this is a valid operation based on the file type. */ 1040 switch (vp->v_type) { 1041 case VDIR: 1042 return EISDIR; 1043 case VREG: 1044 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1045 return EROFS; 1046 break; 1047 case VBLK: 1048 /* FALLTHROUGH */ 1049 case VCHR: 1050 /* FALLTHROUGH */ 1051 case VFIFO: 1052 /* Allow modifications of special files even if in the file 1053 * system is mounted read-only (we are not modifying the 1054 * files themselves, but the objects they represent). */ 1055 return 0; 1056 default: 1057 /* Anything else is unsupported. */ 1058 return EOPNOTSUPP; 1059 } 1060 1061 #if notyet 1062 /* TODO get vaflags from the extended attributes? */ 1063 /* Immutable or append-only files cannot be modified, either. */ 1064 if (node->flags & (IMMUTABLE | APPEND)) 1065 return EPERM; 1066 #endif 1067 1068 /* resize file to the requested size */ 1069 error = udf_resize_node(udf_node, newsize, &extended); 1070 1071 if (error == 0) { 1072 /* mark change */ 1073 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1074 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1075 udf_node->i_flags |= IN_ACCESS; 1076 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1077 udf_update(vp, NULL, NULL, NULL, 0); 1078 } 1079 1080 return error; 1081 } 1082 1083 1084 static int 1085 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1086 { 1087 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1088 return EROFS; 1089 1090 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1091 1092 return 0; 1093 } 1094 1095 1096 static int 1097 udf_chtimes(struct vnode *vp, 1098 struct timespec *atime, struct timespec *mtime, 1099 struct timespec *birthtime, int setattrflags, 1100 kauth_cred_t cred) 1101 { 1102 struct udf_node *udf_node = VTOI(vp); 1103 uid_t uid; 1104 gid_t gid; 1105 int error; 1106 1107 #ifdef notyet 1108 /* TODO get vaflags from the extended attributes? */ 1109 /* Immutable or append-only files cannot be modified, either. */ 1110 if (udf_node->flags & (IMMUTABLE | APPEND)) 1111 return EPERM; 1112 #endif 1113 1114 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1115 return EROFS; 1116 1117 /* retrieve uid/gid values */ 1118 udf_getownership(udf_node, &uid, &gid); 1119 1120 /* check permissions */ 1121 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1122 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1123 if (error) 1124 return (error); 1125 1126 /* update node flags depending on what times are passed */ 1127 if (atime->tv_sec != VNOVAL) 1128 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1129 udf_node->i_flags |= IN_ACCESS; 1130 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1131 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1132 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1133 udf_node->i_flags |= IN_ACCESS; 1134 } 1135 1136 return udf_update(vp, atime, mtime, birthtime, 0); 1137 } 1138 1139 1140 int 1141 udf_setattr(void *v) 1142 { 1143 struct vop_setattr_args /* { 1144 struct vnode *a_vp; 1145 struct vattr *a_vap; 1146 kauth_cred_t a_cred; 1147 struct lwp *a_l; 1148 } */ *ap = v; 1149 struct vnode *vp = ap->a_vp; 1150 /* struct udf_node *udf_node = VTOI(vp); */ 1151 /* struct udf_mount *ump = udf_node->ump; */ 1152 kauth_cred_t cred = ap->a_cred; 1153 struct vattr *vap = ap->a_vap; 1154 int error; 1155 1156 DPRINTF(CALL, ("udf_setattr called\n")); 1157 1158 /* Abort if any unsettable attribute is given. */ 1159 error = 0; 1160 if (vap->va_type != VNON || 1161 vap->va_nlink != VNOVAL || 1162 vap->va_fsid != VNOVAL || 1163 vap->va_fileid != VNOVAL || 1164 vap->va_blocksize != VNOVAL || 1165 #ifdef notyet 1166 /* checks are debated */ 1167 vap->va_ctime.tv_sec != VNOVAL || 1168 vap->va_ctime.tv_nsec != VNOVAL || 1169 vap->va_birthtime.tv_sec != VNOVAL || 1170 vap->va_birthtime.tv_nsec != VNOVAL || 1171 #endif 1172 vap->va_gen != VNOVAL || 1173 vap->va_rdev != VNOVAL || 1174 vap->va_bytes != VNOVAL) 1175 error = EINVAL; 1176 1177 DPRINTF(ATTR, ("setattr changing:\n")); 1178 if (error == 0 && (vap->va_flags != VNOVAL)) { 1179 DPRINTF(ATTR, ("\tchflags\n")); 1180 error = udf_chflags(vp, vap->va_flags, cred); 1181 } 1182 1183 if (error == 0 && (vap->va_size != VNOVAL)) { 1184 DPRINTF(ATTR, ("\tchsize\n")); 1185 error = udf_chsize(vp, vap->va_size, cred); 1186 } 1187 1188 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1189 DPRINTF(ATTR, ("\tchown\n")); 1190 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1191 } 1192 1193 if (error == 0 && (vap->va_mode != VNOVAL)) { 1194 DPRINTF(ATTR, ("\tchmod\n")); 1195 error = udf_chmod(vp, vap->va_mode, cred); 1196 } 1197 1198 if (error == 0 && 1199 ((vap->va_atime.tv_sec != VNOVAL && 1200 vap->va_atime.tv_nsec != VNOVAL) || 1201 (vap->va_mtime.tv_sec != VNOVAL && 1202 vap->va_mtime.tv_nsec != VNOVAL)) 1203 ) { 1204 DPRINTF(ATTR, ("\tchtimes\n")); 1205 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1206 &vap->va_birthtime, vap->va_vaflags, cred); 1207 } 1208 VN_KNOTE(vp, NOTE_ATTRIB); 1209 1210 return error; 1211 } 1212 1213 /* --------------------------------------------------------------------- */ 1214 1215 /* 1216 * Return POSIX pathconf information for UDF file systems. 1217 */ 1218 int 1219 udf_pathconf(void *v) 1220 { 1221 struct vop_pathconf_args /* { 1222 struct vnode *a_vp; 1223 int a_name; 1224 register_t *a_retval; 1225 } */ *ap = v; 1226 uint32_t bits; 1227 1228 DPRINTF(CALL, ("udf_pathconf called\n")); 1229 1230 switch (ap->a_name) { 1231 case _PC_LINK_MAX: 1232 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1233 return 0; 1234 case _PC_NAME_MAX: 1235 *ap->a_retval = UDF_MAXNAMLEN; 1236 return 0; 1237 case _PC_PATH_MAX: 1238 *ap->a_retval = PATH_MAX; 1239 return 0; 1240 case _PC_PIPE_BUF: 1241 *ap->a_retval = PIPE_BUF; 1242 return 0; 1243 case _PC_CHOWN_RESTRICTED: 1244 *ap->a_retval = 1; 1245 return 0; 1246 case _PC_NO_TRUNC: 1247 *ap->a_retval = 1; 1248 return 0; 1249 case _PC_SYNC_IO: 1250 *ap->a_retval = 0; /* synchronised is off for performance */ 1251 return 0; 1252 case _PC_FILESIZEBITS: 1253 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1254 bits = 64; /* XXX ought to deliver 65 */ 1255 #if 0 1256 if (udf_node) 1257 bits = 64 * vp->v_mount->mnt_dev_bshift; 1258 #endif 1259 *ap->a_retval = bits; 1260 return 0; 1261 } 1262 1263 return EINVAL; 1264 } 1265 1266 1267 /* --------------------------------------------------------------------- */ 1268 1269 int 1270 udf_open(void *v) 1271 { 1272 struct vop_open_args /* { 1273 struct vnode *a_vp; 1274 int a_mode; 1275 kauth_cred_t a_cred; 1276 struct proc *a_p; 1277 } */ *ap = v; 1278 int flags; 1279 1280 DPRINTF(CALL, ("udf_open called\n")); 1281 1282 /* 1283 * Files marked append-only must be opened for appending. 1284 * TODO: get chflags(2) flags from extened attribute. 1285 */ 1286 flags = 0; 1287 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1288 return (EPERM); 1289 1290 return 0; 1291 } 1292 1293 1294 /* --------------------------------------------------------------------- */ 1295 1296 int 1297 udf_close(void *v) 1298 { 1299 struct vop_close_args /* { 1300 struct vnode *a_vp; 1301 int a_fflag; 1302 kauth_cred_t a_cred; 1303 struct proc *a_p; 1304 } */ *ap = v; 1305 struct vnode *vp = ap->a_vp; 1306 struct udf_node *udf_node = VTOI(vp); 1307 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1308 int error; 1309 1310 DPRINTF(CALL, ("udf_close called\n")); 1311 udf_node = udf_node; /* shut up gcc */ 1312 1313 if (!async && (vp->v_type != VDIR)) { 1314 mutex_enter(vp->v_interlock); 1315 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1316 if (error) 1317 return error; 1318 } 1319 1320 mutex_enter(vp->v_interlock); 1321 if (vp->v_usecount > 1) 1322 udf_itimes(udf_node, NULL, NULL, NULL); 1323 mutex_exit(vp->v_interlock); 1324 1325 return 0; 1326 } 1327 1328 1329 /* --------------------------------------------------------------------- */ 1330 1331 static int 1332 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1333 { 1334 int flags; 1335 1336 /* check if we are allowed to write */ 1337 switch (vap->va_type) { 1338 case VDIR: 1339 case VLNK: 1340 case VREG: 1341 /* 1342 * normal nodes: check if we're on a read-only mounted 1343 * filingsystem and bomb out if we're trying to write. 1344 */ 1345 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1346 return EROFS; 1347 break; 1348 case VBLK: 1349 case VCHR: 1350 case VSOCK: 1351 case VFIFO: 1352 /* 1353 * special nodes: even on read-only mounted filingsystems 1354 * these are allowed to be written to if permissions allow. 1355 */ 1356 break; 1357 default: 1358 /* no idea what this is */ 1359 return EINVAL; 1360 } 1361 1362 /* noone may write immutable files */ 1363 /* TODO: get chflags(2) flags from extened attribute. */ 1364 flags = 0; 1365 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1366 return EPERM; 1367 1368 return 0; 1369 } 1370 1371 static int 1372 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1373 kauth_cred_t cred) 1374 { 1375 1376 /* ask the generic genfs_can_access to advice on security */ 1377 return kauth_authorize_vnode(cred, kauth_access_action(mode, 1378 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1379 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1380 } 1381 1382 int 1383 udf_access(void *v) 1384 { 1385 struct vop_access_args /* { 1386 struct vnode *a_vp; 1387 int a_mode; 1388 kauth_cred_t a_cred; 1389 struct proc *a_p; 1390 } */ *ap = v; 1391 struct vnode *vp = ap->a_vp; 1392 mode_t mode = ap->a_mode; 1393 kauth_cred_t cred = ap->a_cred; 1394 /* struct udf_node *udf_node = VTOI(vp); */ 1395 struct vattr vap; 1396 int error; 1397 1398 DPRINTF(CALL, ("udf_access called\n")); 1399 1400 error = VOP_GETATTR(vp, &vap, NULL); 1401 if (error) 1402 return error; 1403 1404 error = udf_check_possible(vp, &vap, mode); 1405 if (error) 1406 return error; 1407 1408 error = udf_check_permitted(vp, &vap, mode, cred); 1409 1410 return error; 1411 } 1412 1413 /* --------------------------------------------------------------------- */ 1414 1415 int 1416 udf_create(void *v) 1417 { 1418 struct vop_create_args /* { 1419 struct vnode *a_dvp; 1420 struct vnode **a_vpp; 1421 struct componentname *a_cnp; 1422 struct vattr *a_vap; 1423 } */ *ap = v; 1424 struct vnode *dvp = ap->a_dvp; 1425 struct vnode **vpp = ap->a_vpp; 1426 struct vattr *vap = ap->a_vap; 1427 struct componentname *cnp = ap->a_cnp; 1428 int error; 1429 1430 DPRINTF(CALL, ("udf_create called\n")); 1431 error = udf_create_node(dvp, vpp, vap, cnp); 1432 1433 vput(dvp); 1434 return error; 1435 } 1436 1437 /* --------------------------------------------------------------------- */ 1438 1439 int 1440 udf_mknod(void *v) 1441 { 1442 struct vop_mknod_args /* { 1443 struct vnode *a_dvp; 1444 struct vnode **a_vpp; 1445 struct componentname *a_cnp; 1446 struct vattr *a_vap; 1447 } */ *ap = v; 1448 struct vnode *dvp = ap->a_dvp; 1449 struct vnode **vpp = ap->a_vpp; 1450 struct vattr *vap = ap->a_vap; 1451 struct componentname *cnp = ap->a_cnp; 1452 int error; 1453 1454 DPRINTF(CALL, ("udf_mknod called\n")); 1455 error = udf_create_node(dvp, vpp, vap, cnp); 1456 1457 vput(dvp); 1458 return error; 1459 } 1460 1461 /* --------------------------------------------------------------------- */ 1462 1463 int 1464 udf_mkdir(void *v) 1465 { 1466 struct vop_mkdir_args /* { 1467 struct vnode *a_dvp; 1468 struct vnode **a_vpp; 1469 struct componentname *a_cnp; 1470 struct vattr *a_vap; 1471 } */ *ap = v; 1472 struct vnode *dvp = ap->a_dvp; 1473 struct vnode **vpp = ap->a_vpp; 1474 struct vattr *vap = ap->a_vap; 1475 struct componentname *cnp = ap->a_cnp; 1476 int error; 1477 1478 DPRINTF(CALL, ("udf_mkdir called\n")); 1479 error = udf_create_node(dvp, vpp, vap, cnp); 1480 1481 vput(dvp); 1482 return error; 1483 } 1484 1485 /* --------------------------------------------------------------------- */ 1486 1487 static int 1488 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1489 { 1490 struct udf_node *udf_node, *dir_node; 1491 struct vattr vap; 1492 int error; 1493 1494 DPRINTF(CALL, ("udf_link called\n")); 1495 KASSERT(dvp != vp); 1496 KASSERT(vp->v_type != VDIR); 1497 KASSERT(dvp->v_mount == vp->v_mount); 1498 1499 /* lock node */ 1500 error = vn_lock(vp, LK_EXCLUSIVE); 1501 if (error) 1502 return error; 1503 1504 /* get attributes */ 1505 dir_node = VTOI(dvp); 1506 udf_node = VTOI(vp); 1507 1508 error = VOP_GETATTR(vp, &vap, FSCRED); 1509 if (error) { 1510 VOP_UNLOCK(vp); 1511 return error; 1512 } 1513 1514 /* check link count overflow */ 1515 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1516 VOP_UNLOCK(vp); 1517 return EMLINK; 1518 } 1519 1520 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1521 if (error) 1522 VOP_UNLOCK(vp); 1523 return error; 1524 } 1525 1526 int 1527 udf_link(void *v) 1528 { 1529 struct vop_link_args /* { 1530 struct vnode *a_dvp; 1531 struct vnode *a_vp; 1532 struct componentname *a_cnp; 1533 } */ *ap = v; 1534 struct vnode *dvp = ap->a_dvp; 1535 struct vnode *vp = ap->a_vp; 1536 struct componentname *cnp = ap->a_cnp; 1537 int error; 1538 1539 error = udf_do_link(dvp, vp, cnp); 1540 if (error) 1541 VOP_ABORTOP(dvp, cnp); 1542 1543 VN_KNOTE(vp, NOTE_LINK); 1544 VN_KNOTE(dvp, NOTE_WRITE); 1545 vput(dvp); 1546 1547 return error; 1548 } 1549 1550 /* --------------------------------------------------------------------- */ 1551 1552 static int 1553 udf_do_symlink(struct udf_node *udf_node, char *target) 1554 { 1555 struct pathcomp pathcomp; 1556 uint8_t *pathbuf, *pathpos, *compnamepos; 1557 char *mntonname; 1558 int pathlen, len, compnamelen, mntonnamelen; 1559 int error; 1560 1561 /* process `target' to an UDF structure */ 1562 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1563 pathpos = pathbuf; 1564 pathlen = 0; 1565 1566 if (*target == '/') { 1567 /* symlink starts from the root */ 1568 len = UDF_PATH_COMP_SIZE; 1569 memset(&pathcomp, 0, len); 1570 pathcomp.type = UDF_PATH_COMP_ROOT; 1571 1572 /* check if its mount-point relative! */ 1573 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1574 mntonnamelen = strlen(mntonname); 1575 if (strlen(target) >= mntonnamelen) { 1576 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1577 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1578 target += mntonnamelen; 1579 } 1580 } else { 1581 target++; 1582 } 1583 1584 memcpy(pathpos, &pathcomp, len); 1585 pathpos += len; 1586 pathlen += len; 1587 } 1588 1589 error = 0; 1590 while (*target) { 1591 /* ignore multiple '/' */ 1592 while (*target == '/') { 1593 target++; 1594 } 1595 if (!*target) 1596 break; 1597 1598 /* extract component name */ 1599 compnamelen = 0; 1600 compnamepos = target; 1601 while ((*target) && (*target != '/')) { 1602 target++; 1603 compnamelen++; 1604 } 1605 1606 /* just trunc if too long ?? (security issue) */ 1607 if (compnamelen >= 127) { 1608 error = ENAMETOOLONG; 1609 break; 1610 } 1611 1612 /* convert unix name to UDF name */ 1613 len = sizeof(struct pathcomp); 1614 memset(&pathcomp, 0, len); 1615 pathcomp.type = UDF_PATH_COMP_NAME; 1616 len = UDF_PATH_COMP_SIZE; 1617 1618 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1619 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1620 if ((compnamelen == 1) && (*compnamepos == '.')) 1621 pathcomp.type = UDF_PATH_COMP_CURDIR; 1622 1623 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1624 unix_to_udf_name( 1625 (char *) &pathcomp.ident, &pathcomp.l_ci, 1626 compnamepos, compnamelen, 1627 &udf_node->ump->logical_vol->desc_charset); 1628 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1629 } 1630 1631 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1632 error = ENAMETOOLONG; 1633 break; 1634 } 1635 1636 memcpy(pathpos, &pathcomp, len); 1637 pathpos += len; 1638 pathlen += len; 1639 } 1640 1641 if (error) { 1642 /* aparently too big */ 1643 free(pathbuf, M_UDFTEMP); 1644 return error; 1645 } 1646 1647 error = udf_grow_node(udf_node, pathlen); 1648 if (error) { 1649 /* failed to pregrow node */ 1650 free(pathbuf, M_UDFTEMP); 1651 return error; 1652 } 1653 1654 /* write out structure on the new file */ 1655 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1656 pathbuf, pathlen, 0, 1657 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1658 FSCRED, NULL, NULL); 1659 1660 /* return status of symlink contents writeout */ 1661 free(pathbuf, M_UDFTEMP); 1662 return error; 1663 } 1664 1665 1666 int 1667 udf_symlink(void *v) 1668 { 1669 struct vop_symlink_args /* { 1670 struct vnode *a_dvp; 1671 struct vnode **a_vpp; 1672 struct componentname *a_cnp; 1673 struct vattr *a_vap; 1674 char *a_target; 1675 } */ *ap = v; 1676 struct vnode *dvp = ap->a_dvp; 1677 struct vnode **vpp = ap->a_vpp; 1678 struct vattr *vap = ap->a_vap; 1679 struct componentname *cnp = ap->a_cnp; 1680 struct udf_node *dir_node; 1681 struct udf_node *udf_node; 1682 int error; 1683 1684 DPRINTF(CALL, ("udf_symlink called\n")); 1685 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1686 error = udf_create_node(dvp, vpp, vap, cnp); 1687 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1688 if (!error) { 1689 dir_node = VTOI(dvp); 1690 udf_node = VTOI(*vpp); 1691 KASSERT(udf_node); 1692 error = udf_do_symlink(udf_node, ap->a_target); 1693 if (error) { 1694 /* remove node */ 1695 udf_shrink_node(udf_node, 0); 1696 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1697 } 1698 } 1699 vput(dvp); 1700 return error; 1701 } 1702 1703 /* --------------------------------------------------------------------- */ 1704 1705 int 1706 udf_readlink(void *v) 1707 { 1708 struct vop_readlink_args /* { 1709 struct vnode *a_vp; 1710 struct uio *a_uio; 1711 kauth_cred_t a_cred; 1712 } */ *ap = v; 1713 struct vnode *vp = ap->a_vp; 1714 struct uio *uio = ap->a_uio; 1715 kauth_cred_t cred = ap->a_cred; 1716 struct udf_node *udf_node; 1717 struct pathcomp pathcomp; 1718 struct vattr vattr; 1719 uint8_t *pathbuf, *targetbuf, *tmpname; 1720 uint8_t *pathpos, *targetpos; 1721 char *mntonname; 1722 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1723 int first, error; 1724 1725 DPRINTF(CALL, ("udf_readlink called\n")); 1726 1727 udf_node = VTOI(vp); 1728 error = VOP_GETATTR(vp, &vattr, cred); 1729 if (error) 1730 return error; 1731 1732 /* claim temporary buffers for translation */ 1733 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1734 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1735 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1736 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1737 memset(targetbuf, 0, PATH_MAX); 1738 1739 /* read contents of file in our temporary buffer */ 1740 error = vn_rdwr(UIO_READ, udf_node->vnode, 1741 pathbuf, vattr.va_size, 0, 1742 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1743 FSCRED, NULL, NULL); 1744 if (error) { 1745 /* failed to read in symlink contents */ 1746 free(pathbuf, M_UDFTEMP); 1747 free(targetbuf, M_UDFTEMP); 1748 free(tmpname, M_UDFTEMP); 1749 return error; 1750 } 1751 1752 /* convert to a unix path */ 1753 pathpos = pathbuf; 1754 pathlen = 0; 1755 targetpos = targetbuf; 1756 targetlen = PATH_MAX; 1757 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1758 mntonnamelen = strlen(mntonname); 1759 1760 error = 0; 1761 first = 1; 1762 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1763 len = UDF_PATH_COMP_SIZE; 1764 memcpy(&pathcomp, pathpos, len); 1765 l_ci = pathcomp.l_ci; 1766 switch (pathcomp.type) { 1767 case UDF_PATH_COMP_ROOT : 1768 /* XXX should check for l_ci; bugcompatible now */ 1769 if ((targetlen < 1) || !first) { 1770 error = EINVAL; 1771 break; 1772 } 1773 *targetpos++ = '/'; targetlen--; 1774 break; 1775 case UDF_PATH_COMP_MOUNTROOT : 1776 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1777 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1778 error = EINVAL; 1779 break; 1780 } 1781 memcpy(targetpos, mntonname, mntonnamelen); 1782 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1783 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1784 /* more follows, so must be directory */ 1785 *targetpos++ = '/'; targetlen--; 1786 } 1787 break; 1788 case UDF_PATH_COMP_PARENTDIR : 1789 /* XXX should check for l_ci; bugcompatible now */ 1790 if (targetlen < 3) { 1791 error = EINVAL; 1792 break; 1793 } 1794 *targetpos++ = '.'; targetlen--; 1795 *targetpos++ = '.'; targetlen--; 1796 *targetpos++ = '/'; targetlen--; 1797 break; 1798 case UDF_PATH_COMP_CURDIR : 1799 /* XXX should check for l_ci; bugcompatible now */ 1800 if (targetlen < 2) { 1801 error = EINVAL; 1802 break; 1803 } 1804 *targetpos++ = '.'; targetlen--; 1805 *targetpos++ = '/'; targetlen--; 1806 break; 1807 case UDF_PATH_COMP_NAME : 1808 if (l_ci == 0) { 1809 error = EINVAL; 1810 break; 1811 } 1812 memset(tmpname, 0, PATH_MAX); 1813 memcpy(&pathcomp, pathpos, len + l_ci); 1814 udf_to_unix_name(tmpname, MAXPATHLEN, 1815 pathcomp.ident, l_ci, 1816 &udf_node->ump->logical_vol->desc_charset); 1817 namelen = strlen(tmpname); 1818 if (targetlen < namelen + 1) { 1819 error = EINVAL; 1820 break; 1821 } 1822 memcpy(targetpos, tmpname, namelen); 1823 targetpos += namelen; targetlen -= namelen; 1824 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1825 /* more follows, so must be directory */ 1826 *targetpos++ = '/'; targetlen--; 1827 } 1828 break; 1829 default : 1830 error = EINVAL; 1831 break; 1832 } 1833 first = 0; 1834 if (error) 1835 break; 1836 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1837 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1838 1839 } 1840 /* all processed? */ 1841 if (vattr.va_size - pathlen > 0) 1842 error = EINVAL; 1843 1844 /* uiomove() to destination */ 1845 if (!error) 1846 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1847 1848 free(pathbuf, M_UDFTEMP); 1849 free(targetbuf, M_UDFTEMP); 1850 free(tmpname, M_UDFTEMP); 1851 1852 return error; 1853 } 1854 1855 /* --------------------------------------------------------------------- */ 1856 1857 /* 1858 * Check if source directory is in the path of the target directory. Target 1859 * is supplied locked, source is unlocked. The target is always vput before 1860 * returning. Modeled after UFS. 1861 * 1862 * If source is on the path from target to the root, return error. 1863 */ 1864 1865 static int 1866 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1867 { 1868 struct udf_mount *ump = target->ump; 1869 struct udf_node *res_node; 1870 struct long_ad icb_loc, *root_icb; 1871 const char *name; 1872 int namelen; 1873 int error, found; 1874 1875 name = ".."; 1876 namelen = 2; 1877 error = 0; 1878 res_node = target; 1879 1880 root_icb = &ump->fileset_desc->rootdir_icb; 1881 1882 /* if nodes are equal, it is no use looking */ 1883 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1884 error = EEXIST; 1885 goto out; 1886 } 1887 1888 /* nothing can exist before the root */ 1889 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1890 error = 0; 1891 goto out; 1892 } 1893 1894 for (;;) { 1895 DPRINTF(NODE, ("udf_on_rootpath : " 1896 "source vp %p, looking at vp %p\n", 1897 source->vnode, res_node->vnode)); 1898 1899 /* sanity check */ 1900 if (res_node->vnode->v_type != VDIR) { 1901 error = ENOTDIR; 1902 goto out; 1903 } 1904 1905 /* go down one level */ 1906 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1907 &icb_loc, &found); 1908 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1909 "found %d\n", error, found)); 1910 1911 if (!found) 1912 error = ENOENT; 1913 if (error) 1914 goto out; 1915 1916 /* did we encounter source node? */ 1917 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1918 error = EINVAL; 1919 goto out; 1920 } 1921 1922 /* did we encounter the root node? */ 1923 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1924 error = 0; 1925 goto out; 1926 } 1927 1928 /* push our intermediate node, we're done with it */ 1929 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1930 vput(res_node->vnode); 1931 1932 DPRINTF(NODE, ("\tgetting the .. node\n")); 1933 error = udf_get_node(ump, &icb_loc, &res_node); 1934 1935 if (error) { /* argh, bail out */ 1936 KASSERT(res_node == NULL); 1937 // res_node = NULL; 1938 goto out; 1939 } 1940 } 1941 out: 1942 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1943 1944 /* put our last node */ 1945 if (res_node) 1946 vput(res_node->vnode); 1947 1948 return error; 1949 } 1950 1951 /* note: i tried to follow the logics of the tmpfs rename code */ 1952 int 1953 udf_rename(void *v) 1954 { 1955 struct vop_rename_args /* { 1956 struct vnode *a_fdvp; 1957 struct vnode *a_fvp; 1958 struct componentname *a_fcnp; 1959 struct vnode *a_tdvp; 1960 struct vnode *a_tvp; 1961 struct componentname *a_tcnp; 1962 } */ *ap = v; 1963 struct vnode *tvp = ap->a_tvp; 1964 struct vnode *tdvp = ap->a_tdvp; 1965 struct vnode *fvp = ap->a_fvp; 1966 struct vnode *fdvp = ap->a_fdvp; 1967 struct componentname *tcnp = ap->a_tcnp; 1968 struct componentname *fcnp = ap->a_fcnp; 1969 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1970 struct vattr fvap, tvap; 1971 int error; 1972 1973 DPRINTF(CALL, ("udf_rename called\n")); 1974 1975 /* disallow cross-device renames */ 1976 if (fvp->v_mount != tdvp->v_mount || 1977 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1978 error = EXDEV; 1979 goto out_unlocked; 1980 } 1981 1982 fnode = VTOI(fvp); 1983 fdnode = VTOI(fdvp); 1984 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1985 tdnode = VTOI(tdvp); 1986 1987 /* lock our source dir */ 1988 if (fdnode != tdnode) { 1989 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1990 if (error != 0) 1991 goto out_unlocked; 1992 } 1993 1994 /* get info about the node to be moved */ 1995 vn_lock(fvp, LK_SHARED | LK_RETRY); 1996 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1997 VOP_UNLOCK(fvp); 1998 KASSERT(error == 0); 1999 2000 /* check when to delete the old already existing entry */ 2001 if (tvp) { 2002 /* get info about the node to be moved to */ 2003 error = VOP_GETATTR(tvp, &tvap, FSCRED); 2004 KASSERT(error == 0); 2005 2006 /* if both dirs, make sure the destination is empty */ 2007 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 2008 if (tvap.va_nlink > 2) { 2009 error = ENOTEMPTY; 2010 goto out; 2011 } 2012 } 2013 /* if moving dir, make sure destination is dir too */ 2014 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2015 error = ENOTDIR; 2016 goto out; 2017 } 2018 /* if we're moving a non-directory, make sure dest is no dir */ 2019 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2020 error = EISDIR; 2021 goto out; 2022 } 2023 } 2024 2025 /* check if moving a directory to a new parent is allowed */ 2026 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2027 /* release tvp since we might encounter it and lock up */ 2028 if (tvp) 2029 vput(tvp); 2030 2031 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2032 vref(tdvp); 2033 2034 /* search if fnode is a component of tdnode's path to root */ 2035 error = udf_on_rootpath(fnode, tdnode); 2036 2037 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2038 2039 if (error) { 2040 /* compensate for our vref earlier */ 2041 vrele(tdvp); 2042 goto out; 2043 } 2044 2045 /* relock tdvp; its still here due to the vref earlier */ 2046 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2047 2048 /* 2049 * re-lookup tvp since the parent has been unlocked, so could 2050 * have changed/removed in the meantime. 2051 */ 2052 error = relookup(tdvp, &tvp, tcnp, 0); 2053 if (error) { 2054 vput(tdvp); 2055 goto out; 2056 } 2057 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2058 } 2059 2060 /* remove existing entry if present */ 2061 if (tvp) 2062 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2063 2064 /* create new directory entry for the node */ 2065 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2066 if (error) 2067 goto out; 2068 2069 /* unlink old directory entry for the node, if failing, unattach new */ 2070 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2071 if (error) 2072 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2073 if (error) 2074 goto out; 2075 2076 /* update tnode's '..' if moving directory to new parent */ 2077 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2078 /* update fnode's '..' entry */ 2079 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2080 if (error) { 2081 /* 'try' to recover from this situation */ 2082 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2083 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2084 } 2085 } 2086 2087 out: 2088 if (fdnode != tdnode) 2089 VOP_UNLOCK(fdvp); 2090 2091 out_unlocked: 2092 VOP_ABORTOP(tdvp, tcnp); 2093 if (tdvp == tvp) 2094 vrele(tdvp); 2095 else 2096 vput(tdvp); 2097 if (tvp) 2098 vput(tvp); 2099 VOP_ABORTOP(fdvp, fcnp); 2100 2101 /* release source nodes. */ 2102 vrele(fdvp); 2103 vrele(fvp); 2104 2105 return error; 2106 } 2107 2108 /* --------------------------------------------------------------------- */ 2109 2110 int 2111 udf_remove(void *v) 2112 { 2113 struct vop_remove_args /* { 2114 struct vnode *a_dvp; 2115 struct vnode *a_vp; 2116 struct componentname *a_cnp; 2117 } */ *ap = v; 2118 struct vnode *dvp = ap->a_dvp; 2119 struct vnode *vp = ap->a_vp; 2120 struct componentname *cnp = ap->a_cnp; 2121 struct udf_node *dir_node = VTOI(dvp); 2122 struct udf_node *udf_node = VTOI(vp); 2123 struct udf_mount *ump = dir_node->ump; 2124 int error; 2125 2126 DPRINTF(CALL, ("udf_remove called\n")); 2127 if (vp->v_type != VDIR) { 2128 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2129 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2130 } else { 2131 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2132 error = EPERM; 2133 } 2134 2135 if (error == 0) { 2136 VN_KNOTE(vp, NOTE_DELETE); 2137 VN_KNOTE(dvp, NOTE_WRITE); 2138 } 2139 2140 if (dvp == vp) 2141 vrele(vp); 2142 else 2143 vput(vp); 2144 vput(dvp); 2145 2146 return error; 2147 } 2148 2149 /* --------------------------------------------------------------------- */ 2150 2151 int 2152 udf_rmdir(void *v) 2153 { 2154 struct vop_rmdir_args /* { 2155 struct vnode *a_dvp; 2156 struct vnode *a_vp; 2157 struct componentname *a_cnp; 2158 } */ *ap = v; 2159 struct vnode *vp = ap->a_vp; 2160 struct vnode *dvp = ap->a_dvp; 2161 struct componentname *cnp = ap->a_cnp; 2162 struct udf_node *dir_node = VTOI(dvp); 2163 struct udf_node *udf_node = VTOI(vp); 2164 struct udf_mount *ump = dir_node->ump; 2165 int refcnt, error; 2166 2167 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2168 2169 /* don't allow '.' to be deleted */ 2170 if (dir_node == udf_node) { 2171 vrele(dvp); 2172 vput(vp); 2173 return EINVAL; 2174 } 2175 2176 /* check to see if the directory is empty */ 2177 error = 0; 2178 if (dir_node->fe) { 2179 refcnt = udf_rw16(udf_node->fe->link_cnt); 2180 } else { 2181 refcnt = udf_rw16(udf_node->efe->link_cnt); 2182 } 2183 if (refcnt > 1) { 2184 /* NOT empty */ 2185 vput(dvp); 2186 vput(vp); 2187 return ENOTEMPTY; 2188 } 2189 2190 /* detach the node from the directory */ 2191 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2192 if (error == 0) { 2193 cache_purge(vp); 2194 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2195 VN_KNOTE(vp, NOTE_DELETE); 2196 } 2197 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2198 2199 /* unput the nodes and exit */ 2200 vput(dvp); 2201 vput(vp); 2202 2203 return error; 2204 } 2205 2206 /* --------------------------------------------------------------------- */ 2207 2208 int 2209 udf_fsync(void *v) 2210 { 2211 struct vop_fsync_args /* { 2212 struct vnode *a_vp; 2213 kauth_cred_t a_cred; 2214 int a_flags; 2215 off_t offlo; 2216 off_t offhi; 2217 struct proc *a_p; 2218 } */ *ap = v; 2219 struct vnode *vp = ap->a_vp; 2220 struct udf_node *udf_node = VTOI(vp); 2221 int error, flags, wait; 2222 2223 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2224 udf_node, 2225 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2226 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2227 2228 /* flush data and wait for it when requested */ 2229 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2230 error = vflushbuf(vp, wait); 2231 if (error) 2232 return error; 2233 2234 if (udf_node == NULL) { 2235 printf("udf_fsync() called on NULL udf_node!\n"); 2236 return 0; 2237 } 2238 if (vp->v_tag != VT_UDF) { 2239 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2240 return 0; 2241 } 2242 2243 /* set our times */ 2244 udf_itimes(udf_node, NULL, NULL, NULL); 2245 2246 /* if called when mounted readonly, never write back */ 2247 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2248 return 0; 2249 2250 /* if only data is requested, return */ 2251 if (ap->a_flags & FSYNC_DATAONLY) 2252 return 0; 2253 2254 /* check if the node is dirty 'enough'*/ 2255 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2256 if (flags == 0) 2257 return 0; 2258 2259 /* if we don't have to wait, check for IO pending */ 2260 if (!wait) { 2261 if (vp->v_numoutput > 0) { 2262 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2263 return 0; 2264 } 2265 if (udf_node->outstanding_bufs > 0) { 2266 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2267 return 0; 2268 } 2269 if (udf_node->outstanding_nodedscr > 0) { 2270 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2271 return 0; 2272 } 2273 } 2274 2275 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2276 if (wait) { 2277 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2278 mutex_enter(vp->v_interlock); 2279 while (vp->v_numoutput) { 2280 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2281 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2282 } 2283 mutex_exit(vp->v_interlock); 2284 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2285 } 2286 2287 /* write out node and wait for it if requested */ 2288 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2289 error = udf_writeout_node(udf_node, wait); 2290 if (error) 2291 return error; 2292 2293 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2294 2295 return 0; 2296 } 2297 2298 /* --------------------------------------------------------------------- */ 2299 2300 int 2301 udf_advlock(void *v) 2302 { 2303 struct vop_advlock_args /* { 2304 struct vnode *a_vp; 2305 void *a_id; 2306 int a_op; 2307 struct flock *a_fl; 2308 int a_flags; 2309 } */ *ap = v; 2310 struct vnode *vp = ap->a_vp; 2311 struct udf_node *udf_node = VTOI(vp); 2312 struct file_entry *fe; 2313 struct extfile_entry *efe; 2314 uint64_t file_size; 2315 2316 DPRINTF(LOCKING, ("udf_advlock called\n")); 2317 2318 /* get directory filesize */ 2319 if (udf_node->fe) { 2320 fe = udf_node->fe; 2321 file_size = udf_rw64(fe->inf_len); 2322 } else { 2323 assert(udf_node->efe); 2324 efe = udf_node->efe; 2325 file_size = udf_rw64(efe->inf_len); 2326 } 2327 2328 return lf_advlock(ap, &udf_node->lockf, file_size); 2329 } 2330 2331 /* --------------------------------------------------------------------- */ 2332 2333 /* Global vfs vnode data structures for udfs */ 2334 int (**udf_vnodeop_p)(void *); 2335 2336 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2337 { &vop_default_desc, vn_default_error }, 2338 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2339 { &vop_create_desc, udf_create }, /* create */ 2340 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2341 { &vop_open_desc, udf_open }, /* open */ 2342 { &vop_close_desc, udf_close }, /* close */ 2343 { &vop_access_desc, udf_access }, /* access */ 2344 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2345 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2346 { &vop_read_desc, udf_read }, /* read */ 2347 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2348 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2349 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2350 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2351 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2352 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2353 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2354 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2355 { &vop_seek_desc, genfs_seek }, /* seek */ 2356 { &vop_remove_desc, udf_remove }, /* remove */ 2357 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2358 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2359 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2360 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2361 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2362 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2363 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2364 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2365 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2366 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2367 { &vop_lock_desc, genfs_lock }, /* lock */ 2368 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2369 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2370 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2371 /* { &vop_print_desc, udf_print }, */ /* print */ 2372 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2373 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2374 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2375 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2376 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2377 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2378 { NULL, NULL } 2379 }; 2380 2381 2382 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2383 &udf_vnodeop_p, udf_vnodeop_entries 2384 }; 2385 2386