1 /* $NetBSD: udf_vnops.c,v 1.72 2012/07/22 00:53:21 rmind 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 1.72 2012/07/22 00:53:21 rmind 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, 372 PGO_CLEANIT | PGO_LAZY); 373 old_offset = uio->uio_offset; 374 } 375 } 376 uvm_vnp_setsize(vp, file_size); 377 378 /* mark node changed and request update */ 379 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 380 if (vp->v_mount->mnt_flag & MNT_RELATIME) 381 udf_node->i_flags |= IN_ACCESS; 382 383 /* 384 * XXX TODO FFS has code here to reset setuid & setgid when we're not 385 * the superuser as a precaution against tampering. 386 */ 387 388 /* if we wrote a thing, note write action on vnode */ 389 if (resid > uio->uio_resid) 390 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 391 392 if (error) { 393 /* bring back file size to its former size */ 394 /* take notice of its errors? */ 395 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 396 397 /* roll back uio */ 398 uio->uio_offset -= resid - uio->uio_resid; 399 uio->uio_resid = resid; 400 } else { 401 /* if we write and we're synchronous, update node */ 402 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 403 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 404 } 405 406 return error; 407 } 408 409 410 /* --------------------------------------------------------------------- */ 411 412 /* 413 * `Special' bmap functionality that translates all incomming requests to 414 * translate to vop_strategy() calls with the same blocknumbers effectively 415 * not translating at all. 416 */ 417 418 int 419 udf_trivial_bmap(void *v) 420 { 421 struct vop_bmap_args /* { 422 struct vnode *a_vp; 423 daddr_t a_bn; 424 struct vnode **a_vpp; 425 daddr_t *a_bnp; 426 int *a_runp; 427 } */ *ap = v; 428 struct vnode *vp = ap->a_vp; /* our node */ 429 struct vnode **vpp = ap->a_vpp; /* return node */ 430 daddr_t *bnp = ap->a_bnp; /* translated */ 431 daddr_t bn = ap->a_bn; /* origional */ 432 int *runp = ap->a_runp; 433 struct udf_node *udf_node = VTOI(vp); 434 uint32_t lb_size; 435 436 /* get logical block size */ 437 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 438 439 /* could return `-1' to indicate holes/zeros */ 440 /* translate 1:1 */ 441 *bnp = bn; 442 443 /* set the vnode to read the data from with strategy on itself */ 444 if (vpp) 445 *vpp = vp; 446 447 /* set runlength of maximum block size */ 448 if (runp) 449 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 450 451 /* return success */ 452 return 0; 453 } 454 455 /* --------------------------------------------------------------------- */ 456 457 int 458 udf_vfsstrategy(void *v) 459 { 460 struct vop_strategy_args /* { 461 struct vnode *a_vp; 462 struct buf *a_bp; 463 } */ *ap = v; 464 struct vnode *vp = ap->a_vp; 465 struct buf *bp = ap->a_bp; 466 struct udf_node *udf_node = VTOI(vp); 467 uint32_t lb_size, from, sectors; 468 int error; 469 470 DPRINTF(STRATEGY, ("udf_strategy called\n")); 471 472 /* check if we ought to be here */ 473 if (vp->v_type == VBLK || vp->v_type == VCHR) 474 panic("udf_strategy: spec"); 475 476 /* only filebuffers ought to be read/write by this, no descriptors */ 477 assert(bp->b_blkno >= 0); 478 479 /* get sector size */ 480 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 481 482 /* calculate sector to start from */ 483 from = bp->b_blkno; 484 485 /* calculate length to fetch/store in sectors */ 486 sectors = bp->b_bcount / lb_size; 487 assert(bp->b_bcount > 0); 488 489 /* NEVER assume later that this buffer is already translated */ 490 /* bp->b_lblkno = bp->b_blkno; */ 491 492 /* check assertions: we OUGHT to always get multiples of this */ 493 assert(sectors * lb_size == bp->b_bcount); 494 495 /* issue buffer */ 496 error = 0; 497 if (bp->b_flags & B_READ) { 498 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 499 ", sector %d for %d sectors\n", 500 vp, bp, bp->b_blkno, from, sectors)); 501 502 /* read buffer from the udf_node, translate vtop on the way*/ 503 udf_read_filebuf(udf_node, bp); 504 } else { 505 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 506 ", sector %d for %d sectors\n", 507 vp, bp, bp->b_blkno, from, sectors)); 508 509 /* write buffer to the udf_node, translate vtop on the way*/ 510 udf_write_filebuf(udf_node, bp); 511 } 512 513 return bp->b_error; 514 } 515 516 /* --------------------------------------------------------------------- */ 517 518 int 519 udf_readdir(void *v) 520 { 521 struct vop_readdir_args /* { 522 struct vnode *a_vp; 523 struct uio *a_uio; 524 kauth_cred_t a_cred; 525 int *a_eofflag; 526 off_t **a_cookies; 527 int *a_ncookies; 528 } */ *ap = v; 529 struct uio *uio = ap->a_uio; 530 struct vnode *vp = ap->a_vp; 531 struct udf_node *udf_node = VTOI(vp); 532 struct file_entry *fe; 533 struct extfile_entry *efe; 534 struct fileid_desc *fid; 535 struct dirent *dirent; 536 uint64_t file_size, diroffset, transoffset; 537 uint32_t lb_size; 538 int error; 539 540 DPRINTF(READDIR, ("udf_readdir called\n")); 541 542 /* This operation only makes sense on directory nodes. */ 543 if (vp->v_type != VDIR) 544 return ENOTDIR; 545 546 /* get directory filesize */ 547 if (udf_node->fe) { 548 fe = udf_node->fe; 549 file_size = udf_rw64(fe->inf_len); 550 } else { 551 assert(udf_node->efe); 552 efe = udf_node->efe; 553 file_size = udf_rw64(efe->inf_len); 554 } 555 556 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 557 558 /* 559 * Add `.' pseudo entry if at offset zero since its not in the fid 560 * stream 561 */ 562 if (uio->uio_offset == 0) { 563 DPRINTF(READDIR, ("\t'.' inserted\n")); 564 strcpy(dirent->d_name, "."); 565 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 566 dirent->d_type = DT_DIR; 567 dirent->d_namlen = strlen(dirent->d_name); 568 dirent->d_reclen = _DIRENT_SIZE(dirent); 569 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 570 571 /* mark with magic value that we have done the dummy */ 572 uio->uio_offset = UDF_DIRCOOKIE_DOT; 573 } 574 575 /* we are called just as long as we keep on pushing data in */ 576 error = 0; 577 if (uio->uio_offset < file_size) { 578 /* allocate temporary space for fid */ 579 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 580 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 581 582 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 583 uio->uio_offset = 0; 584 585 diroffset = uio->uio_offset; 586 transoffset = diroffset; 587 while (diroffset < file_size) { 588 DPRINTF(READDIR, ("\tread in fid stream\n")); 589 /* transfer a new fid/dirent */ 590 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 591 DPRINTFIF(READDIR, error, ("read error in read fid " 592 "stream : %d\n", error)); 593 if (error) 594 break; 595 596 /* 597 * If there isn't enough space in the uio to return a 598 * whole dirent, break off read 599 */ 600 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 601 break; 602 603 /* remember the last entry we transfered */ 604 transoffset = diroffset; 605 606 /* skip deleted entries */ 607 if (fid->file_char & UDF_FILE_CHAR_DEL) 608 continue; 609 610 /* skip not visible files */ 611 if (fid->file_char & UDF_FILE_CHAR_VIS) 612 continue; 613 614 /* copy dirent to the caller */ 615 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 616 dirent->d_name, dirent->d_type)); 617 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 618 } 619 620 /* pass on last transfered offset */ 621 uio->uio_offset = transoffset; 622 free(fid, M_UDFTEMP); 623 } 624 625 if (ap->a_eofflag) 626 *ap->a_eofflag = (uio->uio_offset >= file_size); 627 628 #ifdef DEBUG 629 if (udf_verbose & UDF_DEBUG_READDIR) { 630 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 631 if (ap->a_eofflag) 632 printf("returning EOF ? %d\n", *ap->a_eofflag); 633 if (error) 634 printf("readdir returning error %d\n", error); 635 } 636 #endif 637 638 free(dirent, M_UDFTEMP); 639 return error; 640 } 641 642 /* --------------------------------------------------------------------- */ 643 644 int 645 udf_lookup(void *v) 646 { 647 struct vop_lookup_args /* { 648 struct vnode *a_dvp; 649 struct vnode **a_vpp; 650 struct componentname *a_cnp; 651 } */ *ap = v; 652 struct vnode *dvp = ap->a_dvp; 653 struct vnode **vpp = ap->a_vpp; 654 struct componentname *cnp = ap->a_cnp; 655 struct udf_node *dir_node, *res_node; 656 struct udf_mount *ump; 657 struct long_ad icb_loc; 658 const char *name; 659 int namelen, nameiop, islastcn, mounted_ro; 660 int vnodetp; 661 int error, found; 662 663 dir_node = VTOI(dvp); 664 ump = dir_node->ump; 665 *vpp = NULL; 666 667 DPRINTF(LOOKUP, ("udf_lookup called\n")); 668 669 /* simplify/clarification flags */ 670 nameiop = cnp->cn_nameiop; 671 islastcn = cnp->cn_flags & ISLASTCN; 672 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 673 674 /* check exec/dirread permissions first */ 675 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 676 if (error) 677 return error; 678 679 DPRINTF(LOOKUP, ("\taccess ok\n")); 680 681 /* 682 * If requesting a modify on the last path element on a read-only 683 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 684 */ 685 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 686 return EROFS; 687 688 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 689 cnp->cn_nameptr)); 690 /* look in the nami cache; returns 0 on success!! */ 691 error = cache_lookup(dvp, vpp, cnp); 692 if (error >= 0) 693 return error; 694 695 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 696 697 /* 698 * Obviously, the file is not (anymore) in the namecache, we have to 699 * search for it. There are three basic cases: '.', '..' and others. 700 * 701 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 702 */ 703 error = 0; 704 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 705 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 706 /* special case 1 '.' */ 707 vref(dvp); 708 *vpp = dvp; 709 /* done */ 710 } else if (cnp->cn_flags & ISDOTDOT) { 711 /* special case 2 '..' */ 712 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 713 714 /* get our node */ 715 name = ".."; 716 namelen = 2; 717 error = udf_lookup_name_in_dir(dvp, name, namelen, 718 &icb_loc, &found); 719 if (error) 720 goto out; 721 if (!found) 722 error = ENOENT; 723 724 /* first unlock parent */ 725 VOP_UNLOCK(dvp); 726 727 if (error == 0) { 728 DPRINTF(LOOKUP, ("\tfound '..'\n")); 729 /* try to create/reuse the node */ 730 error = udf_get_node(ump, &icb_loc, &res_node); 731 732 if (!error) { 733 DPRINTF(LOOKUP, 734 ("\tnode retrieved/created OK\n")); 735 *vpp = res_node->vnode; 736 } 737 } 738 739 /* try to relock parent */ 740 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 741 } else { 742 DPRINTF(LOOKUP, ("\tlookup file\n")); 743 /* all other files */ 744 /* lookup filename in the directory; location icb_loc */ 745 name = cnp->cn_nameptr; 746 namelen = cnp->cn_namelen; 747 error = udf_lookup_name_in_dir(dvp, name, namelen, 748 &icb_loc, &found); 749 if (error) 750 goto out; 751 if (!found) { 752 DPRINTF(LOOKUP, ("\tNOT found\n")); 753 /* 754 * UGH, didn't find name. If we're creating or 755 * renaming on the last name this is OK and we ought 756 * to return EJUSTRETURN if its allowed to be created. 757 */ 758 error = ENOENT; 759 if (islastcn && 760 (nameiop == CREATE || nameiop == RENAME)) 761 error = 0; 762 if (!error) { 763 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 764 if (!error) { 765 error = EJUSTRETURN; 766 } 767 } 768 /* done */ 769 } else { 770 /* try to create/reuse the node */ 771 error = udf_get_node(ump, &icb_loc, &res_node); 772 if (!error) { 773 /* 774 * If we are not at the last path component 775 * and found a non-directory or non-link entry 776 * (which may itself be pointing to a 777 * directory), raise an error. 778 */ 779 vnodetp = res_node->vnode->v_type; 780 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 781 if (!islastcn) 782 error = ENOTDIR; 783 } 784 785 } 786 if (!error) { 787 *vpp = res_node->vnode; 788 } 789 } 790 } 791 792 out: 793 /* 794 * Store result in the cache if requested. If we are creating a file, 795 * the file might not be found and thus putting it into the namecache 796 * might be seen as negative caching. 797 */ 798 if (nameiop != CREATE) 799 cache_enter(dvp, *vpp, cnp); 800 801 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 802 803 return error; 804 } 805 806 /* --------------------------------------------------------------------- */ 807 808 int 809 udf_getattr(void *v) 810 { 811 struct vop_getattr_args /* { 812 struct vnode *a_vp; 813 struct vattr *a_vap; 814 kauth_cred_t a_cred; 815 struct lwp *a_l; 816 } */ *ap = v; 817 struct vnode *vp = ap->a_vp; 818 struct udf_node *udf_node = VTOI(vp); 819 struct udf_mount *ump = udf_node->ump; 820 struct file_entry *fe = udf_node->fe; 821 struct extfile_entry *efe = udf_node->efe; 822 struct filetimes_extattr_entry *ft_extattr; 823 struct device_extattr_entry *devattr; 824 struct vattr *vap = ap->a_vap; 825 struct timestamp *atime, *mtime, *attrtime, *creatime; 826 uint64_t filesize, blkssize; 827 uint32_t nlink; 828 uint32_t offset, a_l; 829 uint8_t *filedata; 830 uid_t uid; 831 gid_t gid; 832 int error; 833 834 DPRINTF(CALL, ("udf_getattr called\n")); 835 836 /* update times before we returning values */ 837 udf_itimes(udf_node, NULL, NULL, NULL); 838 839 /* get descriptor information */ 840 if (fe) { 841 nlink = udf_rw16(fe->link_cnt); 842 uid = (uid_t)udf_rw32(fe->uid); 843 gid = (gid_t)udf_rw32(fe->gid); 844 filesize = udf_rw64(fe->inf_len); 845 blkssize = udf_rw64(fe->logblks_rec); 846 atime = &fe->atime; 847 mtime = &fe->mtime; 848 attrtime = &fe->attrtime; 849 filedata = fe->data; 850 851 /* initial guess */ 852 creatime = mtime; 853 854 /* check our extended attribute if present */ 855 error = udf_extattr_search_intern(udf_node, 856 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 857 if (!error) { 858 ft_extattr = (struct filetimes_extattr_entry *) 859 (filedata + offset); 860 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 861 creatime = &ft_extattr->times[0]; 862 } 863 } else { 864 assert(udf_node->efe); 865 nlink = udf_rw16(efe->link_cnt); 866 uid = (uid_t)udf_rw32(efe->uid); 867 gid = (gid_t)udf_rw32(efe->gid); 868 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 869 blkssize = udf_rw64(efe->logblks_rec); 870 atime = &efe->atime; 871 mtime = &efe->mtime; 872 attrtime = &efe->attrtime; 873 creatime = &efe->ctime; 874 filedata = efe->data; 875 } 876 877 /* do the uid/gid translation game */ 878 if (uid == (uid_t) -1) 879 uid = ump->mount_args.anon_uid; 880 if (gid == (gid_t) -1) 881 gid = ump->mount_args.anon_gid; 882 883 /* fill in struct vattr with values from the node */ 884 vattr_null(vap); 885 vap->va_type = vp->v_type; 886 vap->va_mode = udf_getaccessmode(udf_node); 887 vap->va_nlink = nlink; 888 vap->va_uid = uid; 889 vap->va_gid = gid; 890 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 891 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 892 vap->va_size = filesize; 893 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 894 895 /* 896 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 897 * 1 to the link count if its a directory we're requested attributes 898 * of. 899 */ 900 if (vap->va_type == VDIR) 901 vap->va_nlink++; 902 903 /* access times */ 904 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 905 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 906 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 907 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 908 909 vap->va_gen = 1; /* no multiple generations yes (!?) */ 910 vap->va_flags = 0; /* no flags */ 911 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 912 vap->va_filerev = 1; /* TODO file revision numbers? */ 913 vap->va_vaflags = 0; 914 /* TODO get vaflags from the extended attributes? */ 915 916 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 917 error = udf_extattr_search_intern(udf_node, 918 UDF_DEVICESPEC_ATTR_NO, "", 919 &offset, &a_l); 920 /* if error, deny access */ 921 if (error || (filedata == NULL)) { 922 vap->va_mode = 0; /* or v_type = VNON? */ 923 } else { 924 devattr = (struct device_extattr_entry *) 925 filedata + offset; 926 vap->va_rdev = makedev( 927 udf_rw32(devattr->major), 928 udf_rw32(devattr->minor) 929 ); 930 /* TODO we could check the implementator */ 931 } 932 } 933 934 return 0; 935 } 936 937 /* --------------------------------------------------------------------- */ 938 939 static int 940 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 941 kauth_cred_t cred) 942 { 943 struct udf_node *udf_node = VTOI(vp); 944 uid_t uid; 945 gid_t gid; 946 int error; 947 948 #ifdef notyet 949 /* TODO get vaflags from the extended attributes? */ 950 /* Immutable or append-only files cannot be modified, either. */ 951 if (udf_node->flags & (IMMUTABLE | APPEND)) 952 return EPERM; 953 #endif 954 955 if (vp->v_mount->mnt_flag & MNT_RDONLY) 956 return EROFS; 957 958 /* retrieve old values */ 959 udf_getownership(udf_node, &uid, &gid); 960 961 /* only one could be specified */ 962 if (new_uid == VNOVAL) 963 new_uid = uid; 964 if (new_gid == VNOVAL) 965 new_gid = gid; 966 967 /* check if we can fit it in an 32 bits */ 968 if ((uid_t) ((uint32_t) new_uid) != new_uid) 969 return EINVAL; 970 if ((gid_t) ((uint32_t) new_gid) != new_gid) 971 return EINVAL; 972 973 /* check permissions */ 974 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 975 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 976 if (error) 977 return (error); 978 979 /* change the ownership */ 980 udf_setownership(udf_node, new_uid, new_gid); 981 982 /* mark node changed */ 983 udf_node->i_flags |= IN_CHANGE; 984 if (vp->v_mount->mnt_flag & MNT_RELATIME) 985 udf_node->i_flags |= IN_ACCESS; 986 987 return 0; 988 } 989 990 991 static int 992 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 993 { 994 struct udf_node *udf_node = VTOI(vp); 995 uid_t uid; 996 gid_t gid; 997 int error; 998 999 #ifdef notyet 1000 /* TODO get vaflags from the extended attributes? */ 1001 /* Immutable or append-only files cannot be modified, either. */ 1002 if (udf_node->flags & (IMMUTABLE | APPEND)) 1003 return EPERM; 1004 #endif 1005 1006 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1007 return EROFS; 1008 1009 /* retrieve uid/gid values */ 1010 udf_getownership(udf_node, &uid, &gid); 1011 1012 /* check permissions */ 1013 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1014 NULL, genfs_can_chmod(vp->v_type, 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 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1024 udf_node->i_flags |= IN_ACCESS; 1025 1026 return 0; 1027 } 1028 1029 1030 /* exported */ 1031 int 1032 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1033 { 1034 struct udf_node *udf_node = VTOI(vp); 1035 int error, extended; 1036 1037 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1038 return EROFS; 1039 1040 /* Decide whether this is a valid operation based on the file type. */ 1041 switch (vp->v_type) { 1042 case VDIR: 1043 return EISDIR; 1044 case VREG: 1045 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1046 return EROFS; 1047 break; 1048 case VBLK: 1049 /* FALLTHROUGH */ 1050 case VCHR: 1051 /* FALLTHROUGH */ 1052 case VFIFO: 1053 /* Allow modifications of special files even if in the file 1054 * system is mounted read-only (we are not modifying the 1055 * files themselves, but the objects they represent). */ 1056 return 0; 1057 default: 1058 /* Anything else is unsupported. */ 1059 return EOPNOTSUPP; 1060 } 1061 1062 #if notyet 1063 /* TODO get vaflags from the extended attributes? */ 1064 /* Immutable or append-only files cannot be modified, either. */ 1065 if (node->flags & (IMMUTABLE | APPEND)) 1066 return EPERM; 1067 #endif 1068 1069 /* resize file to the requested size */ 1070 error = udf_resize_node(udf_node, newsize, &extended); 1071 1072 if (error == 0) { 1073 /* mark change */ 1074 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1075 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1076 udf_node->i_flags |= IN_ACCESS; 1077 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1078 udf_update(vp, NULL, NULL, NULL, 0); 1079 } 1080 1081 return error; 1082 } 1083 1084 1085 static int 1086 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1087 { 1088 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1089 return EROFS; 1090 1091 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1092 1093 return 0; 1094 } 1095 1096 1097 static int 1098 udf_chtimes(struct vnode *vp, 1099 struct timespec *atime, struct timespec *mtime, 1100 struct timespec *birthtime, int setattrflags, 1101 kauth_cred_t cred) 1102 { 1103 struct udf_node *udf_node = VTOI(vp); 1104 uid_t uid; 1105 gid_t gid; 1106 int error; 1107 1108 #ifdef notyet 1109 /* TODO get vaflags from the extended attributes? */ 1110 /* Immutable or append-only files cannot be modified, either. */ 1111 if (udf_node->flags & (IMMUTABLE | APPEND)) 1112 return EPERM; 1113 #endif 1114 1115 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1116 return EROFS; 1117 1118 /* retrieve uid/gid values */ 1119 udf_getownership(udf_node, &uid, &gid); 1120 1121 /* check permissions */ 1122 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1123 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1124 if (error) 1125 return (error); 1126 1127 /* update node flags depending on what times are passed */ 1128 if (atime->tv_sec != VNOVAL) 1129 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1130 udf_node->i_flags |= IN_ACCESS; 1131 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1132 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1133 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1134 udf_node->i_flags |= IN_ACCESS; 1135 } 1136 1137 return udf_update(vp, atime, mtime, birthtime, 0); 1138 } 1139 1140 1141 int 1142 udf_setattr(void *v) 1143 { 1144 struct vop_setattr_args /* { 1145 struct vnode *a_vp; 1146 struct vattr *a_vap; 1147 kauth_cred_t a_cred; 1148 struct lwp *a_l; 1149 } */ *ap = v; 1150 struct vnode *vp = ap->a_vp; 1151 /* struct udf_node *udf_node = VTOI(vp); */ 1152 /* struct udf_mount *ump = udf_node->ump; */ 1153 kauth_cred_t cred = ap->a_cred; 1154 struct vattr *vap = ap->a_vap; 1155 int error; 1156 1157 DPRINTF(CALL, ("udf_setattr called\n")); 1158 1159 /* Abort if any unsettable attribute is given. */ 1160 error = 0; 1161 if (vap->va_type != VNON || 1162 vap->va_nlink != VNOVAL || 1163 vap->va_fsid != VNOVAL || 1164 vap->va_fileid != VNOVAL || 1165 vap->va_blocksize != VNOVAL || 1166 #ifdef notyet 1167 /* checks are debated */ 1168 vap->va_ctime.tv_sec != VNOVAL || 1169 vap->va_ctime.tv_nsec != VNOVAL || 1170 vap->va_birthtime.tv_sec != VNOVAL || 1171 vap->va_birthtime.tv_nsec != VNOVAL || 1172 #endif 1173 vap->va_gen != VNOVAL || 1174 vap->va_rdev != VNOVAL || 1175 vap->va_bytes != VNOVAL) 1176 error = EINVAL; 1177 1178 DPRINTF(ATTR, ("setattr changing:\n")); 1179 if (error == 0 && (vap->va_flags != VNOVAL)) { 1180 DPRINTF(ATTR, ("\tchflags\n")); 1181 error = udf_chflags(vp, vap->va_flags, cred); 1182 } 1183 1184 if (error == 0 && (vap->va_size != VNOVAL)) { 1185 DPRINTF(ATTR, ("\tchsize\n")); 1186 error = udf_chsize(vp, vap->va_size, cred); 1187 } 1188 1189 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1190 DPRINTF(ATTR, ("\tchown\n")); 1191 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1192 } 1193 1194 if (error == 0 && (vap->va_mode != VNOVAL)) { 1195 DPRINTF(ATTR, ("\tchmod\n")); 1196 error = udf_chmod(vp, vap->va_mode, cred); 1197 } 1198 1199 if (error == 0 && 1200 ((vap->va_atime.tv_sec != VNOVAL && 1201 vap->va_atime.tv_nsec != VNOVAL) || 1202 (vap->va_mtime.tv_sec != VNOVAL && 1203 vap->va_mtime.tv_nsec != VNOVAL)) 1204 ) { 1205 DPRINTF(ATTR, ("\tchtimes\n")); 1206 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1207 &vap->va_birthtime, vap->va_vaflags, cred); 1208 } 1209 VN_KNOTE(vp, NOTE_ATTRIB); 1210 1211 return error; 1212 } 1213 1214 /* --------------------------------------------------------------------- */ 1215 1216 /* 1217 * Return POSIX pathconf information for UDF file systems. 1218 */ 1219 int 1220 udf_pathconf(void *v) 1221 { 1222 struct vop_pathconf_args /* { 1223 struct vnode *a_vp; 1224 int a_name; 1225 register_t *a_retval; 1226 } */ *ap = v; 1227 uint32_t bits; 1228 1229 DPRINTF(CALL, ("udf_pathconf called\n")); 1230 1231 switch (ap->a_name) { 1232 case _PC_LINK_MAX: 1233 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1234 return 0; 1235 case _PC_NAME_MAX: 1236 *ap->a_retval = UDF_MAXNAMLEN; 1237 return 0; 1238 case _PC_PATH_MAX: 1239 *ap->a_retval = PATH_MAX; 1240 return 0; 1241 case _PC_PIPE_BUF: 1242 *ap->a_retval = PIPE_BUF; 1243 return 0; 1244 case _PC_CHOWN_RESTRICTED: 1245 *ap->a_retval = 1; 1246 return 0; 1247 case _PC_NO_TRUNC: 1248 *ap->a_retval = 1; 1249 return 0; 1250 case _PC_SYNC_IO: 1251 *ap->a_retval = 0; /* synchronised is off for performance */ 1252 return 0; 1253 case _PC_FILESIZEBITS: 1254 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1255 bits = 64; /* XXX ought to deliver 65 */ 1256 #if 0 1257 if (udf_node) 1258 bits = 64 * vp->v_mount->mnt_dev_bshift; 1259 #endif 1260 *ap->a_retval = bits; 1261 return 0; 1262 } 1263 1264 return EINVAL; 1265 } 1266 1267 1268 /* --------------------------------------------------------------------- */ 1269 1270 int 1271 udf_open(void *v) 1272 { 1273 struct vop_open_args /* { 1274 struct vnode *a_vp; 1275 int a_mode; 1276 kauth_cred_t a_cred; 1277 struct proc *a_p; 1278 } */ *ap = v; 1279 int flags; 1280 1281 DPRINTF(CALL, ("udf_open called\n")); 1282 1283 /* 1284 * Files marked append-only must be opened for appending. 1285 * TODO: get chflags(2) flags from extened attribute. 1286 */ 1287 flags = 0; 1288 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1289 return (EPERM); 1290 1291 return 0; 1292 } 1293 1294 1295 /* --------------------------------------------------------------------- */ 1296 1297 int 1298 udf_close(void *v) 1299 { 1300 struct vop_close_args /* { 1301 struct vnode *a_vp; 1302 int a_fflag; 1303 kauth_cred_t a_cred; 1304 struct proc *a_p; 1305 } */ *ap = v; 1306 struct vnode *vp = ap->a_vp; 1307 struct udf_node *udf_node = VTOI(vp); 1308 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1309 int error; 1310 1311 DPRINTF(CALL, ("udf_close called\n")); 1312 udf_node = udf_node; /* shut up gcc */ 1313 1314 if (!async && (vp->v_type != VDIR)) { 1315 mutex_enter(vp->v_interlock); 1316 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1317 if (error) 1318 return error; 1319 } 1320 1321 mutex_enter(vp->v_interlock); 1322 if (vp->v_usecount > 1) 1323 udf_itimes(udf_node, NULL, NULL, NULL); 1324 mutex_exit(vp->v_interlock); 1325 1326 return 0; 1327 } 1328 1329 1330 /* --------------------------------------------------------------------- */ 1331 1332 static int 1333 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1334 { 1335 int flags; 1336 1337 /* check if we are allowed to write */ 1338 switch (vap->va_type) { 1339 case VDIR: 1340 case VLNK: 1341 case VREG: 1342 /* 1343 * normal nodes: check if we're on a read-only mounted 1344 * filingsystem and bomb out if we're trying to write. 1345 */ 1346 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1347 return EROFS; 1348 break; 1349 case VBLK: 1350 case VCHR: 1351 case VSOCK: 1352 case VFIFO: 1353 /* 1354 * special nodes: even on read-only mounted filingsystems 1355 * these are allowed to be written to if permissions allow. 1356 */ 1357 break; 1358 default: 1359 /* no idea what this is */ 1360 return EINVAL; 1361 } 1362 1363 /* noone may write immutable files */ 1364 /* TODO: get chflags(2) flags from extened attribute. */ 1365 flags = 0; 1366 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1367 return EPERM; 1368 1369 return 0; 1370 } 1371 1372 static int 1373 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1374 kauth_cred_t cred) 1375 { 1376 1377 /* ask the generic genfs_can_access to advice on security */ 1378 return kauth_authorize_vnode(cred, kauth_access_action(mode, 1379 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1380 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1381 } 1382 1383 int 1384 udf_access(void *v) 1385 { 1386 struct vop_access_args /* { 1387 struct vnode *a_vp; 1388 int a_mode; 1389 kauth_cred_t a_cred; 1390 struct proc *a_p; 1391 } */ *ap = v; 1392 struct vnode *vp = ap->a_vp; 1393 mode_t mode = ap->a_mode; 1394 kauth_cred_t cred = ap->a_cred; 1395 /* struct udf_node *udf_node = VTOI(vp); */ 1396 struct vattr vap; 1397 int error; 1398 1399 DPRINTF(CALL, ("udf_access called\n")); 1400 1401 error = VOP_GETATTR(vp, &vap, NULL); 1402 if (error) 1403 return error; 1404 1405 error = udf_check_possible(vp, &vap, mode); 1406 if (error) 1407 return error; 1408 1409 error = udf_check_permitted(vp, &vap, mode, cred); 1410 1411 return error; 1412 } 1413 1414 /* --------------------------------------------------------------------- */ 1415 1416 int 1417 udf_create(void *v) 1418 { 1419 struct vop_create_args /* { 1420 struct vnode *a_dvp; 1421 struct vnode **a_vpp; 1422 struct componentname *a_cnp; 1423 struct vattr *a_vap; 1424 } */ *ap = v; 1425 struct vnode *dvp = ap->a_dvp; 1426 struct vnode **vpp = ap->a_vpp; 1427 struct vattr *vap = ap->a_vap; 1428 struct componentname *cnp = ap->a_cnp; 1429 int error; 1430 1431 DPRINTF(CALL, ("udf_create called\n")); 1432 error = udf_create_node(dvp, vpp, vap, cnp); 1433 1434 vput(dvp); 1435 return error; 1436 } 1437 1438 /* --------------------------------------------------------------------- */ 1439 1440 int 1441 udf_mknod(void *v) 1442 { 1443 struct vop_mknod_args /* { 1444 struct vnode *a_dvp; 1445 struct vnode **a_vpp; 1446 struct componentname *a_cnp; 1447 struct vattr *a_vap; 1448 } */ *ap = v; 1449 struct vnode *dvp = ap->a_dvp; 1450 struct vnode **vpp = ap->a_vpp; 1451 struct vattr *vap = ap->a_vap; 1452 struct componentname *cnp = ap->a_cnp; 1453 int error; 1454 1455 DPRINTF(CALL, ("udf_mknod called\n")); 1456 error = udf_create_node(dvp, vpp, vap, cnp); 1457 1458 vput(dvp); 1459 return error; 1460 } 1461 1462 /* --------------------------------------------------------------------- */ 1463 1464 int 1465 udf_mkdir(void *v) 1466 { 1467 struct vop_mkdir_args /* { 1468 struct vnode *a_dvp; 1469 struct vnode **a_vpp; 1470 struct componentname *a_cnp; 1471 struct vattr *a_vap; 1472 } */ *ap = v; 1473 struct vnode *dvp = ap->a_dvp; 1474 struct vnode **vpp = ap->a_vpp; 1475 struct vattr *vap = ap->a_vap; 1476 struct componentname *cnp = ap->a_cnp; 1477 int error; 1478 1479 DPRINTF(CALL, ("udf_mkdir called\n")); 1480 error = udf_create_node(dvp, vpp, vap, cnp); 1481 1482 vput(dvp); 1483 return error; 1484 } 1485 1486 /* --------------------------------------------------------------------- */ 1487 1488 static int 1489 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1490 { 1491 struct udf_node *udf_node, *dir_node; 1492 struct vattr vap; 1493 int error; 1494 1495 DPRINTF(CALL, ("udf_link called\n")); 1496 KASSERT(dvp != vp); 1497 KASSERT(vp->v_type != VDIR); 1498 KASSERT(dvp->v_mount == vp->v_mount); 1499 1500 /* lock node */ 1501 error = vn_lock(vp, LK_EXCLUSIVE); 1502 if (error) 1503 return error; 1504 1505 /* get attributes */ 1506 dir_node = VTOI(dvp); 1507 udf_node = VTOI(vp); 1508 1509 error = VOP_GETATTR(vp, &vap, FSCRED); 1510 if (error) { 1511 VOP_UNLOCK(vp); 1512 return error; 1513 } 1514 1515 /* check link count overflow */ 1516 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1517 VOP_UNLOCK(vp); 1518 return EMLINK; 1519 } 1520 1521 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1522 if (error) 1523 VOP_UNLOCK(vp); 1524 return error; 1525 } 1526 1527 int 1528 udf_link(void *v) 1529 { 1530 struct vop_link_args /* { 1531 struct vnode *a_dvp; 1532 struct vnode *a_vp; 1533 struct componentname *a_cnp; 1534 } */ *ap = v; 1535 struct vnode *dvp = ap->a_dvp; 1536 struct vnode *vp = ap->a_vp; 1537 struct componentname *cnp = ap->a_cnp; 1538 int error; 1539 1540 error = udf_do_link(dvp, vp, cnp); 1541 if (error) 1542 VOP_ABORTOP(dvp, cnp); 1543 1544 VN_KNOTE(vp, NOTE_LINK); 1545 VN_KNOTE(dvp, NOTE_WRITE); 1546 vput(dvp); 1547 1548 return error; 1549 } 1550 1551 /* --------------------------------------------------------------------- */ 1552 1553 static int 1554 udf_do_symlink(struct udf_node *udf_node, char *target) 1555 { 1556 struct pathcomp pathcomp; 1557 uint8_t *pathbuf, *pathpos, *compnamepos; 1558 char *mntonname; 1559 int pathlen, len, compnamelen, mntonnamelen; 1560 int error; 1561 1562 /* process `target' to an UDF structure */ 1563 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1564 pathpos = pathbuf; 1565 pathlen = 0; 1566 1567 if (*target == '/') { 1568 /* symlink starts from the root */ 1569 len = UDF_PATH_COMP_SIZE; 1570 memset(&pathcomp, 0, len); 1571 pathcomp.type = UDF_PATH_COMP_ROOT; 1572 1573 /* check if its mount-point relative! */ 1574 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1575 mntonnamelen = strlen(mntonname); 1576 if (strlen(target) >= mntonnamelen) { 1577 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1578 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1579 target += mntonnamelen; 1580 } 1581 } else { 1582 target++; 1583 } 1584 1585 memcpy(pathpos, &pathcomp, len); 1586 pathpos += len; 1587 pathlen += len; 1588 } 1589 1590 error = 0; 1591 while (*target) { 1592 /* ignore multiple '/' */ 1593 while (*target == '/') { 1594 target++; 1595 } 1596 if (!*target) 1597 break; 1598 1599 /* extract component name */ 1600 compnamelen = 0; 1601 compnamepos = target; 1602 while ((*target) && (*target != '/')) { 1603 target++; 1604 compnamelen++; 1605 } 1606 1607 /* just trunc if too long ?? (security issue) */ 1608 if (compnamelen >= 127) { 1609 error = ENAMETOOLONG; 1610 break; 1611 } 1612 1613 /* convert unix name to UDF name */ 1614 len = sizeof(struct pathcomp); 1615 memset(&pathcomp, 0, len); 1616 pathcomp.type = UDF_PATH_COMP_NAME; 1617 len = UDF_PATH_COMP_SIZE; 1618 1619 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1620 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1621 if ((compnamelen == 1) && (*compnamepos == '.')) 1622 pathcomp.type = UDF_PATH_COMP_CURDIR; 1623 1624 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1625 unix_to_udf_name( 1626 (char *) &pathcomp.ident, &pathcomp.l_ci, 1627 compnamepos, compnamelen, 1628 &udf_node->ump->logical_vol->desc_charset); 1629 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1630 } 1631 1632 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1633 error = ENAMETOOLONG; 1634 break; 1635 } 1636 1637 memcpy(pathpos, &pathcomp, len); 1638 pathpos += len; 1639 pathlen += len; 1640 } 1641 1642 if (error) { 1643 /* aparently too big */ 1644 free(pathbuf, M_UDFTEMP); 1645 return error; 1646 } 1647 1648 error = udf_grow_node(udf_node, pathlen); 1649 if (error) { 1650 /* failed to pregrow node */ 1651 free(pathbuf, M_UDFTEMP); 1652 return error; 1653 } 1654 1655 /* write out structure on the new file */ 1656 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1657 pathbuf, pathlen, 0, 1658 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1659 FSCRED, NULL, NULL); 1660 1661 /* return status of symlink contents writeout */ 1662 free(pathbuf, M_UDFTEMP); 1663 return error; 1664 } 1665 1666 1667 int 1668 udf_symlink(void *v) 1669 { 1670 struct vop_symlink_args /* { 1671 struct vnode *a_dvp; 1672 struct vnode **a_vpp; 1673 struct componentname *a_cnp; 1674 struct vattr *a_vap; 1675 char *a_target; 1676 } */ *ap = v; 1677 struct vnode *dvp = ap->a_dvp; 1678 struct vnode **vpp = ap->a_vpp; 1679 struct vattr *vap = ap->a_vap; 1680 struct componentname *cnp = ap->a_cnp; 1681 struct udf_node *dir_node; 1682 struct udf_node *udf_node; 1683 int error; 1684 1685 DPRINTF(CALL, ("udf_symlink called\n")); 1686 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1687 error = udf_create_node(dvp, vpp, vap, cnp); 1688 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1689 if (!error) { 1690 dir_node = VTOI(dvp); 1691 udf_node = VTOI(*vpp); 1692 KASSERT(udf_node); 1693 error = udf_do_symlink(udf_node, ap->a_target); 1694 if (error) { 1695 /* remove node */ 1696 udf_shrink_node(udf_node, 0); 1697 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1698 } 1699 } 1700 vput(dvp); 1701 return error; 1702 } 1703 1704 /* --------------------------------------------------------------------- */ 1705 1706 int 1707 udf_readlink(void *v) 1708 { 1709 struct vop_readlink_args /* { 1710 struct vnode *a_vp; 1711 struct uio *a_uio; 1712 kauth_cred_t a_cred; 1713 } */ *ap = v; 1714 struct vnode *vp = ap->a_vp; 1715 struct uio *uio = ap->a_uio; 1716 kauth_cred_t cred = ap->a_cred; 1717 struct udf_node *udf_node; 1718 struct pathcomp pathcomp; 1719 struct vattr vattr; 1720 uint8_t *pathbuf, *targetbuf, *tmpname; 1721 uint8_t *pathpos, *targetpos; 1722 char *mntonname; 1723 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1724 int first, error; 1725 1726 DPRINTF(CALL, ("udf_readlink called\n")); 1727 1728 udf_node = VTOI(vp); 1729 error = VOP_GETATTR(vp, &vattr, cred); 1730 if (error) 1731 return error; 1732 1733 /* claim temporary buffers for translation */ 1734 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1735 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1736 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1737 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1738 memset(targetbuf, 0, PATH_MAX); 1739 1740 /* read contents of file in our temporary buffer */ 1741 error = vn_rdwr(UIO_READ, udf_node->vnode, 1742 pathbuf, vattr.va_size, 0, 1743 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1744 FSCRED, NULL, NULL); 1745 if (error) { 1746 /* failed to read in symlink contents */ 1747 free(pathbuf, M_UDFTEMP); 1748 free(targetbuf, M_UDFTEMP); 1749 free(tmpname, M_UDFTEMP); 1750 return error; 1751 } 1752 1753 /* convert to a unix path */ 1754 pathpos = pathbuf; 1755 pathlen = 0; 1756 targetpos = targetbuf; 1757 targetlen = PATH_MAX; 1758 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1759 mntonnamelen = strlen(mntonname); 1760 1761 error = 0; 1762 first = 1; 1763 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1764 len = UDF_PATH_COMP_SIZE; 1765 memcpy(&pathcomp, pathpos, len); 1766 l_ci = pathcomp.l_ci; 1767 switch (pathcomp.type) { 1768 case UDF_PATH_COMP_ROOT : 1769 /* XXX should check for l_ci; bugcompatible now */ 1770 if ((targetlen < 1) || !first) { 1771 error = EINVAL; 1772 break; 1773 } 1774 *targetpos++ = '/'; targetlen--; 1775 break; 1776 case UDF_PATH_COMP_MOUNTROOT : 1777 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1778 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1779 error = EINVAL; 1780 break; 1781 } 1782 memcpy(targetpos, mntonname, mntonnamelen); 1783 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1784 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1785 /* more follows, so must be directory */ 1786 *targetpos++ = '/'; targetlen--; 1787 } 1788 break; 1789 case UDF_PATH_COMP_PARENTDIR : 1790 /* XXX should check for l_ci; bugcompatible now */ 1791 if (targetlen < 3) { 1792 error = EINVAL; 1793 break; 1794 } 1795 *targetpos++ = '.'; targetlen--; 1796 *targetpos++ = '.'; targetlen--; 1797 *targetpos++ = '/'; targetlen--; 1798 break; 1799 case UDF_PATH_COMP_CURDIR : 1800 /* XXX should check for l_ci; bugcompatible now */ 1801 if (targetlen < 2) { 1802 error = EINVAL; 1803 break; 1804 } 1805 *targetpos++ = '.'; targetlen--; 1806 *targetpos++ = '/'; targetlen--; 1807 break; 1808 case UDF_PATH_COMP_NAME : 1809 if (l_ci == 0) { 1810 error = EINVAL; 1811 break; 1812 } 1813 memset(tmpname, 0, PATH_MAX); 1814 memcpy(&pathcomp, pathpos, len + l_ci); 1815 udf_to_unix_name(tmpname, MAXPATHLEN, 1816 pathcomp.ident, l_ci, 1817 &udf_node->ump->logical_vol->desc_charset); 1818 namelen = strlen(tmpname); 1819 if (targetlen < namelen + 1) { 1820 error = EINVAL; 1821 break; 1822 } 1823 memcpy(targetpos, tmpname, namelen); 1824 targetpos += namelen; targetlen -= namelen; 1825 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1826 /* more follows, so must be directory */ 1827 *targetpos++ = '/'; targetlen--; 1828 } 1829 break; 1830 default : 1831 error = EINVAL; 1832 break; 1833 } 1834 first = 0; 1835 if (error) 1836 break; 1837 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1838 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1839 1840 } 1841 /* all processed? */ 1842 if (vattr.va_size - pathlen > 0) 1843 error = EINVAL; 1844 1845 /* uiomove() to destination */ 1846 if (!error) 1847 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1848 1849 free(pathbuf, M_UDFTEMP); 1850 free(targetbuf, M_UDFTEMP); 1851 free(tmpname, M_UDFTEMP); 1852 1853 return error; 1854 } 1855 1856 /* --------------------------------------------------------------------- */ 1857 1858 /* 1859 * Check if source directory is in the path of the target directory. Target 1860 * is supplied locked, source is unlocked. The target is always vput before 1861 * returning. Modeled after UFS. 1862 * 1863 * If source is on the path from target to the root, return error. 1864 */ 1865 1866 static int 1867 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1868 { 1869 struct udf_mount *ump = target->ump; 1870 struct udf_node *res_node; 1871 struct long_ad icb_loc, *root_icb; 1872 const char *name; 1873 int namelen; 1874 int error, found; 1875 1876 name = ".."; 1877 namelen = 2; 1878 error = 0; 1879 res_node = target; 1880 1881 root_icb = &ump->fileset_desc->rootdir_icb; 1882 1883 /* if nodes are equal, it is no use looking */ 1884 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1885 error = EEXIST; 1886 goto out; 1887 } 1888 1889 /* nothing can exist before the root */ 1890 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1891 error = 0; 1892 goto out; 1893 } 1894 1895 for (;;) { 1896 DPRINTF(NODE, ("udf_on_rootpath : " 1897 "source vp %p, looking at vp %p\n", 1898 source->vnode, res_node->vnode)); 1899 1900 /* sanity check */ 1901 if (res_node->vnode->v_type != VDIR) { 1902 error = ENOTDIR; 1903 goto out; 1904 } 1905 1906 /* go down one level */ 1907 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1908 &icb_loc, &found); 1909 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1910 "found %d\n", error, found)); 1911 1912 if (!found) 1913 error = ENOENT; 1914 if (error) 1915 goto out; 1916 1917 /* did we encounter source node? */ 1918 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1919 error = EINVAL; 1920 goto out; 1921 } 1922 1923 /* did we encounter the root node? */ 1924 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1925 error = 0; 1926 goto out; 1927 } 1928 1929 /* push our intermediate node, we're done with it */ 1930 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1931 vput(res_node->vnode); 1932 1933 DPRINTF(NODE, ("\tgetting the .. node\n")); 1934 error = udf_get_node(ump, &icb_loc, &res_node); 1935 1936 if (error) { /* argh, bail out */ 1937 KASSERT(res_node == NULL); 1938 // res_node = NULL; 1939 goto out; 1940 } 1941 } 1942 out: 1943 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1944 1945 /* put our last node */ 1946 if (res_node) 1947 vput(res_node->vnode); 1948 1949 return error; 1950 } 1951 1952 /* note: i tried to follow the logics of the tmpfs rename code */ 1953 int 1954 udf_rename(void *v) 1955 { 1956 struct vop_rename_args /* { 1957 struct vnode *a_fdvp; 1958 struct vnode *a_fvp; 1959 struct componentname *a_fcnp; 1960 struct vnode *a_tdvp; 1961 struct vnode *a_tvp; 1962 struct componentname *a_tcnp; 1963 } */ *ap = v; 1964 struct vnode *tvp = ap->a_tvp; 1965 struct vnode *tdvp = ap->a_tdvp; 1966 struct vnode *fvp = ap->a_fvp; 1967 struct vnode *fdvp = ap->a_fdvp; 1968 struct componentname *tcnp = ap->a_tcnp; 1969 struct componentname *fcnp = ap->a_fcnp; 1970 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1971 struct vattr fvap, tvap; 1972 int error; 1973 1974 DPRINTF(CALL, ("udf_rename called\n")); 1975 1976 /* disallow cross-device renames */ 1977 if (fvp->v_mount != tdvp->v_mount || 1978 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1979 error = EXDEV; 1980 goto out_unlocked; 1981 } 1982 1983 fnode = VTOI(fvp); 1984 fdnode = VTOI(fdvp); 1985 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1986 tdnode = VTOI(tdvp); 1987 1988 /* lock our source dir */ 1989 if (fdnode != tdnode) { 1990 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1991 if (error != 0) 1992 goto out_unlocked; 1993 } 1994 1995 /* get info about the node to be moved */ 1996 vn_lock(fvp, LK_SHARED | LK_RETRY); 1997 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1998 VOP_UNLOCK(fvp); 1999 KASSERT(error == 0); 2000 2001 /* check when to delete the old already existing entry */ 2002 if (tvp) { 2003 /* get info about the node to be moved to */ 2004 error = VOP_GETATTR(tvp, &tvap, FSCRED); 2005 KASSERT(error == 0); 2006 2007 /* if both dirs, make sure the destination is empty */ 2008 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 2009 if (tvap.va_nlink > 2) { 2010 error = ENOTEMPTY; 2011 goto out; 2012 } 2013 } 2014 /* if moving dir, make sure destination is dir too */ 2015 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2016 error = ENOTDIR; 2017 goto out; 2018 } 2019 /* if we're moving a non-directory, make sure dest is no dir */ 2020 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2021 error = EISDIR; 2022 goto out; 2023 } 2024 } 2025 2026 /* check if moving a directory to a new parent is allowed */ 2027 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2028 /* release tvp since we might encounter it and lock up */ 2029 if (tvp) 2030 vput(tvp); 2031 2032 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2033 vref(tdvp); 2034 2035 /* search if fnode is a component of tdnode's path to root */ 2036 error = udf_on_rootpath(fnode, tdnode); 2037 2038 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2039 2040 if (error) { 2041 /* compensate for our vref earlier */ 2042 vrele(tdvp); 2043 goto out; 2044 } 2045 2046 /* relock tdvp; its still here due to the vref earlier */ 2047 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2048 2049 /* 2050 * re-lookup tvp since the parent has been unlocked, so could 2051 * have changed/removed in the meantime. 2052 */ 2053 error = relookup(tdvp, &tvp, tcnp, 0); 2054 if (error) { 2055 vput(tdvp); 2056 goto out; 2057 } 2058 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2059 } 2060 2061 /* remove existing entry if present */ 2062 if (tvp) 2063 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2064 2065 /* create new directory entry for the node */ 2066 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2067 if (error) 2068 goto out; 2069 2070 /* unlink old directory entry for the node, if failing, unattach new */ 2071 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2072 if (error) 2073 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2074 if (error) 2075 goto out; 2076 2077 /* update tnode's '..' if moving directory to new parent */ 2078 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2079 /* update fnode's '..' entry */ 2080 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2081 if (error) { 2082 /* 'try' to recover from this situation */ 2083 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2084 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2085 } 2086 } 2087 2088 out: 2089 if (fdnode != tdnode) 2090 VOP_UNLOCK(fdvp); 2091 2092 out_unlocked: 2093 VOP_ABORTOP(tdvp, tcnp); 2094 if (tdvp == tvp) 2095 vrele(tdvp); 2096 else 2097 vput(tdvp); 2098 if (tvp) 2099 vput(tvp); 2100 VOP_ABORTOP(fdvp, fcnp); 2101 2102 /* release source nodes. */ 2103 vrele(fdvp); 2104 vrele(fvp); 2105 2106 return error; 2107 } 2108 2109 /* --------------------------------------------------------------------- */ 2110 2111 int 2112 udf_remove(void *v) 2113 { 2114 struct vop_remove_args /* { 2115 struct vnode *a_dvp; 2116 struct vnode *a_vp; 2117 struct componentname *a_cnp; 2118 } */ *ap = v; 2119 struct vnode *dvp = ap->a_dvp; 2120 struct vnode *vp = ap->a_vp; 2121 struct componentname *cnp = ap->a_cnp; 2122 struct udf_node *dir_node = VTOI(dvp); 2123 struct udf_node *udf_node = VTOI(vp); 2124 struct udf_mount *ump = dir_node->ump; 2125 int error; 2126 2127 DPRINTF(CALL, ("udf_remove called\n")); 2128 if (vp->v_type != VDIR) { 2129 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2130 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2131 } else { 2132 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2133 error = EPERM; 2134 } 2135 2136 if (error == 0) { 2137 VN_KNOTE(vp, NOTE_DELETE); 2138 VN_KNOTE(dvp, NOTE_WRITE); 2139 } 2140 2141 if (dvp == vp) 2142 vrele(vp); 2143 else 2144 vput(vp); 2145 vput(dvp); 2146 2147 return error; 2148 } 2149 2150 /* --------------------------------------------------------------------- */ 2151 2152 int 2153 udf_rmdir(void *v) 2154 { 2155 struct vop_rmdir_args /* { 2156 struct vnode *a_dvp; 2157 struct vnode *a_vp; 2158 struct componentname *a_cnp; 2159 } */ *ap = v; 2160 struct vnode *vp = ap->a_vp; 2161 struct vnode *dvp = ap->a_dvp; 2162 struct componentname *cnp = ap->a_cnp; 2163 struct udf_node *dir_node = VTOI(dvp); 2164 struct udf_node *udf_node = VTOI(vp); 2165 struct udf_mount *ump = dir_node->ump; 2166 int refcnt, error; 2167 2168 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2169 2170 /* don't allow '.' to be deleted */ 2171 if (dir_node == udf_node) { 2172 vrele(dvp); 2173 vput(vp); 2174 return EINVAL; 2175 } 2176 2177 /* check to see if the directory is empty */ 2178 error = 0; 2179 if (dir_node->fe) { 2180 refcnt = udf_rw16(udf_node->fe->link_cnt); 2181 } else { 2182 refcnt = udf_rw16(udf_node->efe->link_cnt); 2183 } 2184 if (refcnt > 1) { 2185 /* NOT empty */ 2186 vput(dvp); 2187 vput(vp); 2188 return ENOTEMPTY; 2189 } 2190 2191 /* detach the node from the directory */ 2192 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2193 if (error == 0) { 2194 cache_purge(vp); 2195 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2196 VN_KNOTE(vp, NOTE_DELETE); 2197 } 2198 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2199 2200 /* unput the nodes and exit */ 2201 vput(dvp); 2202 vput(vp); 2203 2204 return error; 2205 } 2206 2207 /* --------------------------------------------------------------------- */ 2208 2209 int 2210 udf_fsync(void *v) 2211 { 2212 struct vop_fsync_args /* { 2213 struct vnode *a_vp; 2214 kauth_cred_t a_cred; 2215 int a_flags; 2216 off_t offlo; 2217 off_t offhi; 2218 struct proc *a_p; 2219 } */ *ap = v; 2220 struct vnode *vp = ap->a_vp; 2221 struct udf_node *udf_node = VTOI(vp); 2222 int error, flags, wait; 2223 2224 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2225 udf_node, 2226 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2227 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2228 2229 /* flush data and wait for it when requested */ 2230 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2231 error = vflushbuf(vp, ap->a_flags); 2232 if (error) 2233 return error; 2234 2235 if (udf_node == NULL) { 2236 printf("udf_fsync() called on NULL udf_node!\n"); 2237 return 0; 2238 } 2239 if (vp->v_tag != VT_UDF) { 2240 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2241 return 0; 2242 } 2243 2244 /* set our times */ 2245 udf_itimes(udf_node, NULL, NULL, NULL); 2246 2247 /* if called when mounted readonly, never write back */ 2248 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2249 return 0; 2250 2251 /* if only data is requested, return */ 2252 if (ap->a_flags & FSYNC_DATAONLY) 2253 return 0; 2254 2255 /* check if the node is dirty 'enough'*/ 2256 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2257 if (flags == 0) 2258 return 0; 2259 2260 /* if we don't have to wait, check for IO pending */ 2261 if (!wait) { 2262 if (vp->v_numoutput > 0) { 2263 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2264 return 0; 2265 } 2266 if (udf_node->outstanding_bufs > 0) { 2267 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2268 return 0; 2269 } 2270 if (udf_node->outstanding_nodedscr > 0) { 2271 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2272 return 0; 2273 } 2274 } 2275 2276 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2277 if (wait) { 2278 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2279 mutex_enter(vp->v_interlock); 2280 while (vp->v_numoutput) { 2281 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2282 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2283 } 2284 mutex_exit(vp->v_interlock); 2285 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2286 } 2287 2288 /* write out node and wait for it if requested */ 2289 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2290 error = udf_writeout_node(udf_node, wait); 2291 if (error) 2292 return error; 2293 2294 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2295 2296 return 0; 2297 } 2298 2299 /* --------------------------------------------------------------------- */ 2300 2301 int 2302 udf_advlock(void *v) 2303 { 2304 struct vop_advlock_args /* { 2305 struct vnode *a_vp; 2306 void *a_id; 2307 int a_op; 2308 struct flock *a_fl; 2309 int a_flags; 2310 } */ *ap = v; 2311 struct vnode *vp = ap->a_vp; 2312 struct udf_node *udf_node = VTOI(vp); 2313 struct file_entry *fe; 2314 struct extfile_entry *efe; 2315 uint64_t file_size; 2316 2317 DPRINTF(LOCKING, ("udf_advlock called\n")); 2318 2319 /* get directory filesize */ 2320 if (udf_node->fe) { 2321 fe = udf_node->fe; 2322 file_size = udf_rw64(fe->inf_len); 2323 } else { 2324 assert(udf_node->efe); 2325 efe = udf_node->efe; 2326 file_size = udf_rw64(efe->inf_len); 2327 } 2328 2329 return lf_advlock(ap, &udf_node->lockf, file_size); 2330 } 2331 2332 /* --------------------------------------------------------------------- */ 2333 2334 /* Global vfs vnode data structures for udfs */ 2335 int (**udf_vnodeop_p)(void *); 2336 2337 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2338 { &vop_default_desc, vn_default_error }, 2339 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2340 { &vop_create_desc, udf_create }, /* create */ 2341 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2342 { &vop_open_desc, udf_open }, /* open */ 2343 { &vop_close_desc, udf_close }, /* close */ 2344 { &vop_access_desc, udf_access }, /* access */ 2345 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2346 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2347 { &vop_read_desc, udf_read }, /* read */ 2348 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2349 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2350 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2351 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2352 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2353 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2354 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2355 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2356 { &vop_seek_desc, genfs_seek }, /* seek */ 2357 { &vop_remove_desc, udf_remove }, /* remove */ 2358 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2359 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2360 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2361 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2362 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2363 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2364 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2365 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2366 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2367 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2368 { &vop_lock_desc, genfs_lock }, /* lock */ 2369 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2370 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2371 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2372 /* { &vop_print_desc, udf_print }, */ /* print */ 2373 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2374 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2375 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2376 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2377 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2378 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2379 { NULL, NULL } 2380 }; 2381 2382 2383 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2384 &udf_vnodeop_p, udf_vnodeop_entries 2385 }; 2386