1 /* $NetBSD: udf_vnops.c,v 1.66 2011/06/12 03:35:55 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 1.66 2011/06/12 03:35:55 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, 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; 379 380 /* 381 * XXX TODO FFS has code here to reset setuid & setgid when we're not 382 * the superuser as a precaution against tampering. 383 */ 384 385 /* if we wrote a thing, note write action on vnode */ 386 if (resid > uio->uio_resid) 387 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 388 389 if (error) { 390 /* bring back file size to its former size */ 391 /* take notice of its errors? */ 392 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 393 394 /* roll back uio */ 395 uio->uio_offset -= resid - uio->uio_resid; 396 uio->uio_resid = resid; 397 } else { 398 /* if we write and we're synchronous, update node */ 399 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 400 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 401 } 402 403 return error; 404 } 405 406 407 /* --------------------------------------------------------------------- */ 408 409 /* 410 * `Special' bmap functionality that translates all incomming requests to 411 * translate to vop_strategy() calls with the same blocknumbers effectively 412 * not translating at all. 413 */ 414 415 int 416 udf_trivial_bmap(void *v) 417 { 418 struct vop_bmap_args /* { 419 struct vnode *a_vp; 420 daddr_t a_bn; 421 struct vnode **a_vpp; 422 daddr_t *a_bnp; 423 int *a_runp; 424 } */ *ap = v; 425 struct vnode *vp = ap->a_vp; /* our node */ 426 struct vnode **vpp = ap->a_vpp; /* return node */ 427 daddr_t *bnp = ap->a_bnp; /* translated */ 428 daddr_t bn = ap->a_bn; /* origional */ 429 int *runp = ap->a_runp; 430 struct udf_node *udf_node = VTOI(vp); 431 uint32_t lb_size; 432 433 /* get logical block size */ 434 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 435 436 /* could return `-1' to indicate holes/zeros */ 437 /* translate 1:1 */ 438 *bnp = bn; 439 440 /* set the vnode to read the data from with strategy on itself */ 441 if (vpp) 442 *vpp = vp; 443 444 /* set runlength of maximum block size */ 445 if (runp) 446 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 447 448 /* return success */ 449 return 0; 450 } 451 452 /* --------------------------------------------------------------------- */ 453 454 int 455 udf_vfsstrategy(void *v) 456 { 457 struct vop_strategy_args /* { 458 struct vnode *a_vp; 459 struct buf *a_bp; 460 } */ *ap = v; 461 struct vnode *vp = ap->a_vp; 462 struct buf *bp = ap->a_bp; 463 struct udf_node *udf_node = VTOI(vp); 464 uint32_t lb_size, from, sectors; 465 int error; 466 467 DPRINTF(STRATEGY, ("udf_strategy called\n")); 468 469 /* check if we ought to be here */ 470 if (vp->v_type == VBLK || vp->v_type == VCHR) 471 panic("udf_strategy: spec"); 472 473 /* only filebuffers ought to be read/write by this, no descriptors */ 474 assert(bp->b_blkno >= 0); 475 476 /* get sector size */ 477 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 478 479 /* calculate sector to start from */ 480 from = bp->b_blkno; 481 482 /* calculate length to fetch/store in sectors */ 483 sectors = bp->b_bcount / lb_size; 484 assert(bp->b_bcount > 0); 485 486 /* NEVER assume later that this buffer is already translated */ 487 /* bp->b_lblkno = bp->b_blkno; */ 488 489 /* check assertions: we OUGHT to always get multiples of this */ 490 assert(sectors * lb_size == bp->b_bcount); 491 492 /* issue buffer */ 493 error = 0; 494 if (bp->b_flags & B_READ) { 495 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 496 ", sector %d for %d sectors\n", 497 vp, bp, bp->b_blkno, from, sectors)); 498 499 /* read buffer from the udf_node, translate vtop on the way*/ 500 udf_read_filebuf(udf_node, bp); 501 } else { 502 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 503 ", sector %d for %d sectors\n", 504 vp, bp, bp->b_blkno, from, sectors)); 505 506 /* write buffer to the udf_node, translate vtop on the way*/ 507 udf_write_filebuf(udf_node, bp); 508 } 509 510 return bp->b_error; 511 } 512 513 /* --------------------------------------------------------------------- */ 514 515 int 516 udf_readdir(void *v) 517 { 518 struct vop_readdir_args /* { 519 struct vnode *a_vp; 520 struct uio *a_uio; 521 kauth_cred_t a_cred; 522 int *a_eofflag; 523 off_t **a_cookies; 524 int *a_ncookies; 525 } */ *ap = v; 526 struct uio *uio = ap->a_uio; 527 struct vnode *vp = ap->a_vp; 528 struct udf_node *udf_node = VTOI(vp); 529 struct file_entry *fe; 530 struct extfile_entry *efe; 531 struct fileid_desc *fid; 532 struct dirent *dirent; 533 uint64_t file_size, diroffset, transoffset; 534 uint32_t lb_size; 535 int error; 536 537 DPRINTF(READDIR, ("udf_readdir called\n")); 538 539 /* This operation only makes sense on directory nodes. */ 540 if (vp->v_type != VDIR) 541 return ENOTDIR; 542 543 /* get directory filesize */ 544 if (udf_node->fe) { 545 fe = udf_node->fe; 546 file_size = udf_rw64(fe->inf_len); 547 } else { 548 assert(udf_node->efe); 549 efe = udf_node->efe; 550 file_size = udf_rw64(efe->inf_len); 551 } 552 553 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 554 555 /* 556 * Add `.' pseudo entry if at offset zero since its not in the fid 557 * stream 558 */ 559 if (uio->uio_offset == 0) { 560 DPRINTF(READDIR, ("\t'.' inserted\n")); 561 strcpy(dirent->d_name, "."); 562 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 563 dirent->d_type = DT_DIR; 564 dirent->d_namlen = strlen(dirent->d_name); 565 dirent->d_reclen = _DIRENT_SIZE(dirent); 566 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 567 568 /* mark with magic value that we have done the dummy */ 569 uio->uio_offset = UDF_DIRCOOKIE_DOT; 570 } 571 572 /* we are called just as long as we keep on pushing data in */ 573 error = 0; 574 if (uio->uio_offset < file_size) { 575 /* allocate temporary space for fid */ 576 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 577 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 578 579 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 580 uio->uio_offset = 0; 581 582 diroffset = uio->uio_offset; 583 transoffset = diroffset; 584 while (diroffset < file_size) { 585 DPRINTF(READDIR, ("\tread in fid stream\n")); 586 /* transfer a new fid/dirent */ 587 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 588 DPRINTFIF(READDIR, error, ("read error in read fid " 589 "stream : %d\n", error)); 590 if (error) 591 break; 592 593 /* 594 * If there isn't enough space in the uio to return a 595 * whole dirent, break off read 596 */ 597 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 598 break; 599 600 /* remember the last entry we transfered */ 601 transoffset = diroffset; 602 603 /* skip deleted entries */ 604 if (fid->file_char & UDF_FILE_CHAR_DEL) 605 continue; 606 607 /* skip not visible files */ 608 if (fid->file_char & UDF_FILE_CHAR_VIS) 609 continue; 610 611 /* copy dirent to the caller */ 612 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 613 dirent->d_name, dirent->d_type)); 614 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 615 } 616 617 /* pass on last transfered offset */ 618 uio->uio_offset = transoffset; 619 free(fid, M_UDFTEMP); 620 } 621 622 if (ap->a_eofflag) 623 *ap->a_eofflag = (uio->uio_offset >= file_size); 624 625 #ifdef DEBUG 626 if (udf_verbose & UDF_DEBUG_READDIR) { 627 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 628 if (ap->a_eofflag) 629 printf("returning EOF ? %d\n", *ap->a_eofflag); 630 if (error) 631 printf("readdir returning error %d\n", error); 632 } 633 #endif 634 635 free(dirent, M_UDFTEMP); 636 return error; 637 } 638 639 /* --------------------------------------------------------------------- */ 640 641 int 642 udf_lookup(void *v) 643 { 644 struct vop_lookup_args /* { 645 struct vnode *a_dvp; 646 struct vnode **a_vpp; 647 struct componentname *a_cnp; 648 } */ *ap = v; 649 struct vnode *dvp = ap->a_dvp; 650 struct vnode **vpp = ap->a_vpp; 651 struct componentname *cnp = ap->a_cnp; 652 struct udf_node *dir_node, *res_node; 653 struct udf_mount *ump; 654 struct long_ad icb_loc; 655 const char *name; 656 int namelen, nameiop, islastcn, mounted_ro; 657 int vnodetp; 658 int error, found; 659 660 dir_node = VTOI(dvp); 661 ump = dir_node->ump; 662 *vpp = NULL; 663 664 DPRINTF(LOOKUP, ("udf_lookup called\n")); 665 666 /* simplify/clarification flags */ 667 nameiop = cnp->cn_nameiop; 668 islastcn = cnp->cn_flags & ISLASTCN; 669 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 670 671 /* check exec/dirread permissions first */ 672 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 673 if (error) 674 return error; 675 676 DPRINTF(LOOKUP, ("\taccess ok\n")); 677 678 /* 679 * If requesting a modify on the last path element on a read-only 680 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 681 */ 682 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 683 return EROFS; 684 685 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 686 cnp->cn_nameptr)); 687 /* look in the nami cache; returns 0 on success!! */ 688 error = cache_lookup(dvp, vpp, cnp); 689 if (error >= 0) 690 return error; 691 692 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 693 694 /* 695 * Obviously, the file is not (anymore) in the namecache, we have to 696 * search for it. There are three basic cases: '.', '..' and others. 697 * 698 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 699 */ 700 error = 0; 701 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 702 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 703 /* special case 1 '.' */ 704 vref(dvp); 705 *vpp = dvp; 706 /* done */ 707 } else if (cnp->cn_flags & ISDOTDOT) { 708 /* special case 2 '..' */ 709 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 710 711 /* get our node */ 712 name = ".."; 713 namelen = 2; 714 error = udf_lookup_name_in_dir(dvp, name, namelen, 715 &icb_loc, &found); 716 if (error) 717 goto out; 718 if (!found) 719 error = ENOENT; 720 721 /* first unlock parent */ 722 VOP_UNLOCK(dvp); 723 724 if (error == 0) { 725 DPRINTF(LOOKUP, ("\tfound '..'\n")); 726 /* try to create/reuse the node */ 727 error = udf_get_node(ump, &icb_loc, &res_node); 728 729 if (!error) { 730 DPRINTF(LOOKUP, 731 ("\tnode retrieved/created OK\n")); 732 *vpp = res_node->vnode; 733 } 734 } 735 736 /* try to relock parent */ 737 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 738 } else { 739 DPRINTF(LOOKUP, ("\tlookup file\n")); 740 /* all other files */ 741 /* lookup filename in the directory; location icb_loc */ 742 name = cnp->cn_nameptr; 743 namelen = cnp->cn_namelen; 744 error = udf_lookup_name_in_dir(dvp, name, namelen, 745 &icb_loc, &found); 746 if (error) 747 goto out; 748 if (!found) { 749 DPRINTF(LOOKUP, ("\tNOT found\n")); 750 /* 751 * UGH, didn't find name. If we're creating or 752 * renaming on the last name this is OK and we ought 753 * to return EJUSTRETURN if its allowed to be created. 754 */ 755 error = ENOENT; 756 if (islastcn && 757 (nameiop == CREATE || nameiop == RENAME)) 758 error = 0; 759 if (!error) { 760 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 761 if (!error) { 762 error = EJUSTRETURN; 763 } 764 } 765 /* done */ 766 } else { 767 /* try to create/reuse the node */ 768 error = udf_get_node(ump, &icb_loc, &res_node); 769 if (!error) { 770 /* 771 * If we are not at the last path component 772 * and found a non-directory or non-link entry 773 * (which may itself be pointing to a 774 * directory), raise an error. 775 */ 776 vnodetp = res_node->vnode->v_type; 777 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 778 if (!islastcn) 779 error = ENOTDIR; 780 } 781 782 } 783 if (!error) { 784 *vpp = res_node->vnode; 785 } 786 } 787 } 788 789 out: 790 /* 791 * Store result in the cache if requested. If we are creating a file, 792 * the file might not be found and thus putting it into the namecache 793 * might be seen as negative caching. 794 */ 795 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 796 cache_enter(dvp, *vpp, cnp); 797 798 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 799 800 return error; 801 } 802 803 /* --------------------------------------------------------------------- */ 804 805 int 806 udf_getattr(void *v) 807 { 808 struct vop_getattr_args /* { 809 struct vnode *a_vp; 810 struct vattr *a_vap; 811 kauth_cred_t a_cred; 812 struct lwp *a_l; 813 } */ *ap = v; 814 struct vnode *vp = ap->a_vp; 815 struct udf_node *udf_node = VTOI(vp); 816 struct udf_mount *ump = udf_node->ump; 817 struct file_entry *fe = udf_node->fe; 818 struct extfile_entry *efe = udf_node->efe; 819 struct filetimes_extattr_entry *ft_extattr; 820 struct device_extattr_entry *devattr; 821 struct vattr *vap = ap->a_vap; 822 struct timestamp *atime, *mtime, *attrtime, *creatime; 823 uint64_t filesize, blkssize; 824 uint32_t nlink; 825 uint32_t offset, a_l; 826 uint8_t *filedata; 827 uid_t uid; 828 gid_t gid; 829 int error; 830 831 DPRINTF(CALL, ("udf_getattr called\n")); 832 833 /* update times before we returning values */ 834 udf_itimes(udf_node, NULL, NULL, NULL); 835 836 /* get descriptor information */ 837 if (fe) { 838 nlink = udf_rw16(fe->link_cnt); 839 uid = (uid_t)udf_rw32(fe->uid); 840 gid = (gid_t)udf_rw32(fe->gid); 841 filesize = udf_rw64(fe->inf_len); 842 blkssize = udf_rw64(fe->logblks_rec); 843 atime = &fe->atime; 844 mtime = &fe->mtime; 845 attrtime = &fe->attrtime; 846 filedata = fe->data; 847 848 /* initial guess */ 849 creatime = mtime; 850 851 /* check our extended attribute if present */ 852 error = udf_extattr_search_intern(udf_node, 853 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 854 if (!error) { 855 ft_extattr = (struct filetimes_extattr_entry *) 856 (filedata + offset); 857 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 858 creatime = &ft_extattr->times[0]; 859 } 860 } else { 861 assert(udf_node->efe); 862 nlink = udf_rw16(efe->link_cnt); 863 uid = (uid_t)udf_rw32(efe->uid); 864 gid = (gid_t)udf_rw32(efe->gid); 865 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 866 blkssize = udf_rw64(efe->logblks_rec); 867 atime = &efe->atime; 868 mtime = &efe->mtime; 869 attrtime = &efe->attrtime; 870 creatime = &efe->ctime; 871 filedata = efe->data; 872 } 873 874 /* do the uid/gid translation game */ 875 if (uid == (uid_t) -1) 876 uid = ump->mount_args.anon_uid; 877 if (gid == (gid_t) -1) 878 gid = ump->mount_args.anon_gid; 879 880 /* fill in struct vattr with values from the node */ 881 vattr_null(vap); 882 vap->va_type = vp->v_type; 883 vap->va_mode = udf_getaccessmode(udf_node); 884 vap->va_nlink = nlink; 885 vap->va_uid = uid; 886 vap->va_gid = gid; 887 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 888 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 889 vap->va_size = filesize; 890 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 891 892 /* 893 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 894 * 1 to the link count if its a directory we're requested attributes 895 * of. 896 */ 897 if (vap->va_type == VDIR) 898 vap->va_nlink++; 899 900 /* access times */ 901 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 902 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 903 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 904 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 905 906 vap->va_gen = 1; /* no multiple generations yes (!?) */ 907 vap->va_flags = 0; /* no flags */ 908 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 909 vap->va_filerev = 1; /* TODO file revision numbers? */ 910 vap->va_vaflags = 0; 911 /* TODO get vaflags from the extended attributes? */ 912 913 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 914 error = udf_extattr_search_intern(udf_node, 915 UDF_DEVICESPEC_ATTR_NO, "", 916 &offset, &a_l); 917 /* if error, deny access */ 918 if (error || (filedata == NULL)) { 919 vap->va_mode = 0; /* or v_type = VNON? */ 920 } else { 921 devattr = (struct device_extattr_entry *) 922 filedata + offset; 923 vap->va_rdev = makedev( 924 udf_rw32(devattr->major), 925 udf_rw32(devattr->minor) 926 ); 927 /* TODO we could check the implementator */ 928 } 929 } 930 931 return 0; 932 } 933 934 /* --------------------------------------------------------------------- */ 935 936 static int 937 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 938 kauth_cred_t cred) 939 { 940 struct udf_node *udf_node = VTOI(vp); 941 uid_t uid; 942 gid_t gid; 943 int error; 944 945 #ifdef notyet 946 /* TODO get vaflags from the extended attributes? */ 947 /* Immutable or append-only files cannot be modified, either. */ 948 if (udf_node->flags & (IMMUTABLE | APPEND)) 949 return EPERM; 950 #endif 951 952 if (vp->v_mount->mnt_flag & MNT_RDONLY) 953 return EROFS; 954 955 /* retrieve old values */ 956 udf_getownership(udf_node, &uid, &gid); 957 958 /* only one could be specified */ 959 if (new_uid == VNOVAL) 960 new_uid = uid; 961 if (new_gid == VNOVAL) 962 new_gid = gid; 963 964 /* check if we can fit it in an 32 bits */ 965 if ((uid_t) ((uint32_t) new_uid) != new_uid) 966 return EINVAL; 967 if ((gid_t) ((uint32_t) new_gid) != new_gid) 968 return EINVAL; 969 970 /* check permissions */ 971 error = genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid); 972 if (error) 973 return (error); 974 975 /* change the ownership */ 976 udf_setownership(udf_node, new_uid, new_gid); 977 978 /* mark node changed */ 979 udf_node->i_flags |= IN_CHANGE; 980 981 return 0; 982 } 983 984 985 static int 986 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 987 { 988 struct udf_node *udf_node = VTOI(vp); 989 uid_t uid; 990 gid_t gid; 991 int error; 992 993 #ifdef notyet 994 /* TODO get vaflags from the extended attributes? */ 995 /* Immutable or append-only files cannot be modified, either. */ 996 if (udf_node->flags & (IMMUTABLE | APPEND)) 997 return EPERM; 998 #endif 999 1000 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1001 return EROFS; 1002 1003 /* retrieve uid/gid values */ 1004 udf_getownership(udf_node, &uid, &gid); 1005 1006 /* check permissions */ 1007 error = genfs_can_chmod(vp, cred, uid, gid, mode); 1008 if (error) 1009 return (error); 1010 1011 /* change mode */ 1012 udf_setaccessmode(udf_node, mode); 1013 1014 /* mark node changed */ 1015 udf_node->i_flags |= IN_CHANGE; 1016 1017 return 0; 1018 } 1019 1020 1021 /* exported */ 1022 int 1023 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1024 { 1025 struct udf_node *udf_node = VTOI(vp); 1026 int error, extended; 1027 1028 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1029 return EROFS; 1030 1031 /* Decide whether this is a valid operation based on the file type. */ 1032 switch (vp->v_type) { 1033 case VDIR: 1034 return EISDIR; 1035 case VREG: 1036 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1037 return EROFS; 1038 break; 1039 case VBLK: 1040 /* FALLTHROUGH */ 1041 case VCHR: 1042 /* FALLTHROUGH */ 1043 case VFIFO: 1044 /* Allow modifications of special files even if in the file 1045 * system is mounted read-only (we are not modifying the 1046 * files themselves, but the objects they represent). */ 1047 return 0; 1048 default: 1049 /* Anything else is unsupported. */ 1050 return EOPNOTSUPP; 1051 } 1052 1053 #if notyet 1054 /* TODO get vaflags from the extended attributes? */ 1055 /* Immutable or append-only files cannot be modified, either. */ 1056 if (node->flags & (IMMUTABLE | APPEND)) 1057 return EPERM; 1058 #endif 1059 1060 /* resize file to the requested size */ 1061 error = udf_resize_node(udf_node, newsize, &extended); 1062 1063 if (error == 0) { 1064 /* mark change */ 1065 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1066 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1067 udf_update(vp, NULL, NULL, NULL, 0); 1068 } 1069 1070 return error; 1071 } 1072 1073 1074 static int 1075 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1076 { 1077 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1078 return EROFS; 1079 1080 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1081 1082 return 0; 1083 } 1084 1085 1086 static int 1087 udf_chtimes(struct vnode *vp, 1088 struct timespec *atime, struct timespec *mtime, 1089 struct timespec *birthtime, int setattrflags, 1090 kauth_cred_t cred) 1091 { 1092 struct udf_node *udf_node = VTOI(vp); 1093 uid_t uid; 1094 gid_t gid; 1095 int error; 1096 1097 #ifdef notyet 1098 /* TODO get vaflags from the extended attributes? */ 1099 /* Immutable or append-only files cannot be modified, either. */ 1100 if (udf_node->flags & (IMMUTABLE | APPEND)) 1101 return EPERM; 1102 #endif 1103 1104 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1105 return EROFS; 1106 1107 /* retrieve uid/gid values */ 1108 udf_getownership(udf_node, &uid, &gid); 1109 1110 /* check permissions */ 1111 error = genfs_can_chtimes(vp, setattrflags, uid, cred); 1112 if (error) 1113 return (error); 1114 1115 /* update node flags depending on what times are passed */ 1116 if (atime->tv_sec != VNOVAL) 1117 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1118 udf_node->i_flags |= IN_ACCESS; 1119 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1120 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1121 1122 return udf_update(vp, atime, mtime, birthtime, 0); 1123 } 1124 1125 1126 int 1127 udf_setattr(void *v) 1128 { 1129 struct vop_setattr_args /* { 1130 struct vnode *a_vp; 1131 struct vattr *a_vap; 1132 kauth_cred_t a_cred; 1133 struct lwp *a_l; 1134 } */ *ap = v; 1135 struct vnode *vp = ap->a_vp; 1136 /* struct udf_node *udf_node = VTOI(vp); */ 1137 /* struct udf_mount *ump = udf_node->ump; */ 1138 kauth_cred_t cred = ap->a_cred; 1139 struct vattr *vap = ap->a_vap; 1140 int error; 1141 1142 DPRINTF(CALL, ("udf_setattr called\n")); 1143 1144 /* Abort if any unsettable attribute is given. */ 1145 error = 0; 1146 if (vap->va_type != VNON || 1147 vap->va_nlink != VNOVAL || 1148 vap->va_fsid != VNOVAL || 1149 vap->va_fileid != VNOVAL || 1150 vap->va_blocksize != VNOVAL || 1151 #ifdef notyet 1152 /* checks are debated */ 1153 vap->va_ctime.tv_sec != VNOVAL || 1154 vap->va_ctime.tv_nsec != VNOVAL || 1155 vap->va_birthtime.tv_sec != VNOVAL || 1156 vap->va_birthtime.tv_nsec != VNOVAL || 1157 #endif 1158 vap->va_gen != VNOVAL || 1159 vap->va_rdev != VNOVAL || 1160 vap->va_bytes != VNOVAL) 1161 error = EINVAL; 1162 1163 DPRINTF(ATTR, ("setattr changing:\n")); 1164 if (error == 0 && (vap->va_flags != VNOVAL)) { 1165 DPRINTF(ATTR, ("\tchflags\n")); 1166 error = udf_chflags(vp, vap->va_flags, cred); 1167 } 1168 1169 if (error == 0 && (vap->va_size != VNOVAL)) { 1170 DPRINTF(ATTR, ("\tchsize\n")); 1171 error = udf_chsize(vp, vap->va_size, cred); 1172 } 1173 1174 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1175 DPRINTF(ATTR, ("\tchown\n")); 1176 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1177 } 1178 1179 if (error == 0 && (vap->va_mode != VNOVAL)) { 1180 DPRINTF(ATTR, ("\tchmod\n")); 1181 error = udf_chmod(vp, vap->va_mode, cred); 1182 } 1183 1184 if (error == 0 && 1185 ((vap->va_atime.tv_sec != VNOVAL && 1186 vap->va_atime.tv_nsec != VNOVAL) || 1187 (vap->va_mtime.tv_sec != VNOVAL && 1188 vap->va_mtime.tv_nsec != VNOVAL)) 1189 ) { 1190 DPRINTF(ATTR, ("\tchtimes\n")); 1191 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1192 &vap->va_birthtime, vap->va_vaflags, cred); 1193 } 1194 VN_KNOTE(vp, NOTE_ATTRIB); 1195 1196 return error; 1197 } 1198 1199 /* --------------------------------------------------------------------- */ 1200 1201 /* 1202 * Return POSIX pathconf information for UDF file systems. 1203 */ 1204 int 1205 udf_pathconf(void *v) 1206 { 1207 struct vop_pathconf_args /* { 1208 struct vnode *a_vp; 1209 int a_name; 1210 register_t *a_retval; 1211 } */ *ap = v; 1212 uint32_t bits; 1213 1214 DPRINTF(CALL, ("udf_pathconf called\n")); 1215 1216 switch (ap->a_name) { 1217 case _PC_LINK_MAX: 1218 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1219 return 0; 1220 case _PC_NAME_MAX: 1221 *ap->a_retval = NAME_MAX; 1222 return 0; 1223 case _PC_PATH_MAX: 1224 *ap->a_retval = PATH_MAX; 1225 return 0; 1226 case _PC_PIPE_BUF: 1227 *ap->a_retval = PIPE_BUF; 1228 return 0; 1229 case _PC_CHOWN_RESTRICTED: 1230 *ap->a_retval = 1; 1231 return 0; 1232 case _PC_NO_TRUNC: 1233 *ap->a_retval = 1; 1234 return 0; 1235 case _PC_SYNC_IO: 1236 *ap->a_retval = 0; /* synchronised is off for performance */ 1237 return 0; 1238 case _PC_FILESIZEBITS: 1239 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1240 bits = 64; /* XXX ought to deliver 65 */ 1241 #if 0 1242 if (udf_node) 1243 bits = 64 * vp->v_mount->mnt_dev_bshift; 1244 #endif 1245 *ap->a_retval = bits; 1246 return 0; 1247 } 1248 1249 return EINVAL; 1250 } 1251 1252 1253 /* --------------------------------------------------------------------- */ 1254 1255 int 1256 udf_open(void *v) 1257 { 1258 struct vop_open_args /* { 1259 struct vnode *a_vp; 1260 int a_mode; 1261 kauth_cred_t a_cred; 1262 struct proc *a_p; 1263 } */ *ap = v; 1264 int flags; 1265 1266 DPRINTF(CALL, ("udf_open called\n")); 1267 1268 /* 1269 * Files marked append-only must be opened for appending. 1270 * TODO: get chflags(2) flags from extened attribute. 1271 */ 1272 flags = 0; 1273 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1274 return (EPERM); 1275 1276 return 0; 1277 } 1278 1279 1280 /* --------------------------------------------------------------------- */ 1281 1282 int 1283 udf_close(void *v) 1284 { 1285 struct vop_close_args /* { 1286 struct vnode *a_vp; 1287 int a_fflag; 1288 kauth_cred_t a_cred; 1289 struct proc *a_p; 1290 } */ *ap = v; 1291 struct vnode *vp = ap->a_vp; 1292 struct udf_node *udf_node = VTOI(vp); 1293 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1294 int error; 1295 1296 DPRINTF(CALL, ("udf_close called\n")); 1297 udf_node = udf_node; /* shut up gcc */ 1298 1299 if (!async && (vp->v_type != VDIR)) { 1300 mutex_enter(vp->v_interlock); 1301 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1302 if (error) 1303 return error; 1304 } 1305 1306 mutex_enter(vp->v_interlock); 1307 if (vp->v_usecount > 1) 1308 udf_itimes(udf_node, NULL, NULL, NULL); 1309 mutex_exit(vp->v_interlock); 1310 1311 return 0; 1312 } 1313 1314 1315 /* --------------------------------------------------------------------- */ 1316 1317 static int 1318 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1319 { 1320 int flags; 1321 1322 /* check if we are allowed to write */ 1323 switch (vap->va_type) { 1324 case VDIR: 1325 case VLNK: 1326 case VREG: 1327 /* 1328 * normal nodes: check if we're on a read-only mounted 1329 * filingsystem and bomb out if we're trying to write. 1330 */ 1331 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1332 return EROFS; 1333 break; 1334 case VBLK: 1335 case VCHR: 1336 case VSOCK: 1337 case VFIFO: 1338 /* 1339 * special nodes: even on read-only mounted filingsystems 1340 * these are allowed to be written to if permissions allow. 1341 */ 1342 break; 1343 default: 1344 /* no idea what this is */ 1345 return EINVAL; 1346 } 1347 1348 /* noone may write immutable files */ 1349 /* TODO: get chflags(2) flags from extened attribute. */ 1350 flags = 0; 1351 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1352 return EPERM; 1353 1354 return 0; 1355 } 1356 1357 static int 1358 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1359 kauth_cred_t cred) 1360 { 1361 1362 /* ask the generic genfs_can_access to advice on security */ 1363 return genfs_can_access(vp->v_type, 1364 vap->va_mode, vap->va_uid, vap->va_gid, 1365 mode, cred); 1366 } 1367 1368 int 1369 udf_access(void *v) 1370 { 1371 struct vop_access_args /* { 1372 struct vnode *a_vp; 1373 int a_mode; 1374 kauth_cred_t a_cred; 1375 struct proc *a_p; 1376 } */ *ap = v; 1377 struct vnode *vp = ap->a_vp; 1378 mode_t mode = ap->a_mode; 1379 kauth_cred_t cred = ap->a_cred; 1380 /* struct udf_node *udf_node = VTOI(vp); */ 1381 struct vattr vap; 1382 int error; 1383 1384 DPRINTF(CALL, ("udf_access called\n")); 1385 1386 error = VOP_GETATTR(vp, &vap, NULL); 1387 if (error) 1388 return error; 1389 1390 error = udf_check_possible(vp, &vap, mode); 1391 if (error) 1392 return error; 1393 1394 error = udf_check_permitted(vp, &vap, mode, cred); 1395 1396 return error; 1397 } 1398 1399 /* --------------------------------------------------------------------- */ 1400 1401 int 1402 udf_create(void *v) 1403 { 1404 struct vop_create_args /* { 1405 struct vnode *a_dvp; 1406 struct vnode **a_vpp; 1407 struct componentname *a_cnp; 1408 struct vattr *a_vap; 1409 } */ *ap = v; 1410 struct vnode *dvp = ap->a_dvp; 1411 struct vnode **vpp = ap->a_vpp; 1412 struct vattr *vap = ap->a_vap; 1413 struct componentname *cnp = ap->a_cnp; 1414 int error; 1415 1416 DPRINTF(CALL, ("udf_create called\n")); 1417 error = udf_create_node(dvp, vpp, vap, cnp); 1418 1419 vput(dvp); 1420 return error; 1421 } 1422 1423 /* --------------------------------------------------------------------- */ 1424 1425 int 1426 udf_mknod(void *v) 1427 { 1428 struct vop_mknod_args /* { 1429 struct vnode *a_dvp; 1430 struct vnode **a_vpp; 1431 struct componentname *a_cnp; 1432 struct vattr *a_vap; 1433 } */ *ap = v; 1434 struct vnode *dvp = ap->a_dvp; 1435 struct vnode **vpp = ap->a_vpp; 1436 struct vattr *vap = ap->a_vap; 1437 struct componentname *cnp = ap->a_cnp; 1438 int error; 1439 1440 DPRINTF(CALL, ("udf_mknod called\n")); 1441 error = udf_create_node(dvp, vpp, vap, cnp); 1442 1443 vput(dvp); 1444 return error; 1445 } 1446 1447 /* --------------------------------------------------------------------- */ 1448 1449 int 1450 udf_mkdir(void *v) 1451 { 1452 struct vop_mkdir_args /* { 1453 struct vnode *a_dvp; 1454 struct vnode **a_vpp; 1455 struct componentname *a_cnp; 1456 struct vattr *a_vap; 1457 } */ *ap = v; 1458 struct vnode *dvp = ap->a_dvp; 1459 struct vnode **vpp = ap->a_vpp; 1460 struct vattr *vap = ap->a_vap; 1461 struct componentname *cnp = ap->a_cnp; 1462 int error; 1463 1464 DPRINTF(CALL, ("udf_mkdir called\n")); 1465 error = udf_create_node(dvp, vpp, vap, cnp); 1466 1467 vput(dvp); 1468 return error; 1469 } 1470 1471 /* --------------------------------------------------------------------- */ 1472 1473 static int 1474 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1475 { 1476 struct udf_node *udf_node, *dir_node; 1477 struct vattr vap; 1478 int error; 1479 1480 DPRINTF(CALL, ("udf_link called\n")); 1481 KASSERT(dvp != vp); 1482 KASSERT(vp->v_type != VDIR); 1483 KASSERT(dvp->v_mount == vp->v_mount); 1484 1485 /* lock node */ 1486 error = vn_lock(vp, LK_EXCLUSIVE); 1487 if (error) 1488 return error; 1489 1490 /* get attributes */ 1491 dir_node = VTOI(dvp); 1492 udf_node = VTOI(vp); 1493 1494 error = VOP_GETATTR(vp, &vap, FSCRED); 1495 if (error) { 1496 VOP_UNLOCK(vp); 1497 return error; 1498 } 1499 1500 /* check link count overflow */ 1501 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1502 VOP_UNLOCK(vp); 1503 return EMLINK; 1504 } 1505 1506 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1507 if (error) 1508 VOP_UNLOCK(vp); 1509 return error; 1510 } 1511 1512 int 1513 udf_link(void *v) 1514 { 1515 struct vop_link_args /* { 1516 struct vnode *a_dvp; 1517 struct vnode *a_vp; 1518 struct componentname *a_cnp; 1519 } */ *ap = v; 1520 struct vnode *dvp = ap->a_dvp; 1521 struct vnode *vp = ap->a_vp; 1522 struct componentname *cnp = ap->a_cnp; 1523 int error; 1524 1525 error = udf_do_link(dvp, vp, cnp); 1526 if (error) 1527 VOP_ABORTOP(dvp, cnp); 1528 1529 VN_KNOTE(vp, NOTE_LINK); 1530 VN_KNOTE(dvp, NOTE_WRITE); 1531 vput(dvp); 1532 1533 return error; 1534 } 1535 1536 /* --------------------------------------------------------------------- */ 1537 1538 static int 1539 udf_do_symlink(struct udf_node *udf_node, char *target) 1540 { 1541 struct pathcomp pathcomp; 1542 uint8_t *pathbuf, *pathpos, *compnamepos; 1543 char *mntonname; 1544 int pathlen, len, compnamelen, mntonnamelen; 1545 int error; 1546 1547 /* process `target' to an UDF structure */ 1548 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1549 pathpos = pathbuf; 1550 pathlen = 0; 1551 1552 if (*target == '/') { 1553 /* symlink starts from the root */ 1554 len = UDF_PATH_COMP_SIZE; 1555 memset(&pathcomp, 0, len); 1556 pathcomp.type = UDF_PATH_COMP_ROOT; 1557 1558 /* check if its mount-point relative! */ 1559 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1560 mntonnamelen = strlen(mntonname); 1561 if (strlen(target) >= mntonnamelen) { 1562 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1563 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1564 target += mntonnamelen; 1565 } 1566 } else { 1567 target++; 1568 } 1569 1570 memcpy(pathpos, &pathcomp, len); 1571 pathpos += len; 1572 pathlen += len; 1573 } 1574 1575 error = 0; 1576 while (*target) { 1577 /* ignore multiple '/' */ 1578 while (*target == '/') { 1579 target++; 1580 } 1581 if (!*target) 1582 break; 1583 1584 /* extract component name */ 1585 compnamelen = 0; 1586 compnamepos = target; 1587 while ((*target) && (*target != '/')) { 1588 target++; 1589 compnamelen++; 1590 } 1591 1592 /* just trunc if too long ?? (security issue) */ 1593 if (compnamelen >= 127) { 1594 error = ENAMETOOLONG; 1595 break; 1596 } 1597 1598 /* convert unix name to UDF name */ 1599 len = sizeof(struct pathcomp); 1600 memset(&pathcomp, 0, len); 1601 pathcomp.type = UDF_PATH_COMP_NAME; 1602 len = UDF_PATH_COMP_SIZE; 1603 1604 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1605 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1606 if ((compnamelen == 1) && (*compnamepos == '.')) 1607 pathcomp.type = UDF_PATH_COMP_CURDIR; 1608 1609 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1610 unix_to_udf_name( 1611 (char *) &pathcomp.ident, &pathcomp.l_ci, 1612 compnamepos, compnamelen, 1613 &udf_node->ump->logical_vol->desc_charset); 1614 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1615 } 1616 1617 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1618 error = ENAMETOOLONG; 1619 break; 1620 } 1621 1622 memcpy(pathpos, &pathcomp, len); 1623 pathpos += len; 1624 pathlen += len; 1625 } 1626 1627 if (error) { 1628 /* aparently too big */ 1629 free(pathbuf, M_UDFTEMP); 1630 return error; 1631 } 1632 1633 error = udf_grow_node(udf_node, pathlen); 1634 if (error) { 1635 /* failed to pregrow node */ 1636 free(pathbuf, M_UDFTEMP); 1637 return error; 1638 } 1639 1640 /* write out structure on the new file */ 1641 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1642 pathbuf, pathlen, 0, 1643 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1644 FSCRED, NULL, NULL); 1645 1646 /* return status of symlink contents writeout */ 1647 free(pathbuf, M_UDFTEMP); 1648 return error; 1649 } 1650 1651 1652 int 1653 udf_symlink(void *v) 1654 { 1655 struct vop_symlink_args /* { 1656 struct vnode *a_dvp; 1657 struct vnode **a_vpp; 1658 struct componentname *a_cnp; 1659 struct vattr *a_vap; 1660 char *a_target; 1661 } */ *ap = v; 1662 struct vnode *dvp = ap->a_dvp; 1663 struct vnode **vpp = ap->a_vpp; 1664 struct vattr *vap = ap->a_vap; 1665 struct componentname *cnp = ap->a_cnp; 1666 struct udf_node *dir_node; 1667 struct udf_node *udf_node; 1668 int error; 1669 1670 DPRINTF(CALL, ("udf_symlink called\n")); 1671 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1672 error = udf_create_node(dvp, vpp, vap, cnp); 1673 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1674 if (!error) { 1675 dir_node = VTOI(dvp); 1676 udf_node = VTOI(*vpp); 1677 KASSERT(udf_node); 1678 error = udf_do_symlink(udf_node, ap->a_target); 1679 if (error) { 1680 /* remove node */ 1681 udf_shrink_node(udf_node, 0); 1682 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1683 } 1684 } 1685 vput(dvp); 1686 return error; 1687 } 1688 1689 /* --------------------------------------------------------------------- */ 1690 1691 int 1692 udf_readlink(void *v) 1693 { 1694 struct vop_readlink_args /* { 1695 struct vnode *a_vp; 1696 struct uio *a_uio; 1697 kauth_cred_t a_cred; 1698 } */ *ap = v; 1699 struct vnode *vp = ap->a_vp; 1700 struct uio *uio = ap->a_uio; 1701 kauth_cred_t cred = ap->a_cred; 1702 struct udf_node *udf_node; 1703 struct pathcomp pathcomp; 1704 struct vattr vattr; 1705 uint8_t *pathbuf, *targetbuf, *tmpname; 1706 uint8_t *pathpos, *targetpos; 1707 char *mntonname; 1708 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1709 int first, error; 1710 1711 DPRINTF(CALL, ("udf_readlink called\n")); 1712 1713 udf_node = VTOI(vp); 1714 error = VOP_GETATTR(vp, &vattr, cred); 1715 if (error) 1716 return error; 1717 1718 /* claim temporary buffers for translation */ 1719 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1720 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1721 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1722 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1723 memset(targetbuf, 0, PATH_MAX); 1724 1725 /* read contents of file in our temporary buffer */ 1726 error = vn_rdwr(UIO_READ, udf_node->vnode, 1727 pathbuf, vattr.va_size, 0, 1728 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1729 FSCRED, NULL, NULL); 1730 if (error) { 1731 /* failed to read in symlink contents */ 1732 free(pathbuf, M_UDFTEMP); 1733 free(targetbuf, M_UDFTEMP); 1734 free(tmpname, M_UDFTEMP); 1735 return error; 1736 } 1737 1738 /* convert to a unix path */ 1739 pathpos = pathbuf; 1740 pathlen = 0; 1741 targetpos = targetbuf; 1742 targetlen = PATH_MAX; 1743 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1744 mntonnamelen = strlen(mntonname); 1745 1746 error = 0; 1747 first = 1; 1748 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1749 len = UDF_PATH_COMP_SIZE; 1750 memcpy(&pathcomp, pathpos, len); 1751 l_ci = pathcomp.l_ci; 1752 switch (pathcomp.type) { 1753 case UDF_PATH_COMP_ROOT : 1754 /* XXX should check for l_ci; bugcompatible now */ 1755 if ((targetlen < 1) || !first) { 1756 error = EINVAL; 1757 break; 1758 } 1759 *targetpos++ = '/'; targetlen--; 1760 break; 1761 case UDF_PATH_COMP_MOUNTROOT : 1762 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1763 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1764 error = EINVAL; 1765 break; 1766 } 1767 memcpy(targetpos, mntonname, mntonnamelen); 1768 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1769 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1770 /* more follows, so must be directory */ 1771 *targetpos++ = '/'; targetlen--; 1772 } 1773 break; 1774 case UDF_PATH_COMP_PARENTDIR : 1775 /* XXX should check for l_ci; bugcompatible now */ 1776 if (targetlen < 3) { 1777 error = EINVAL; 1778 break; 1779 } 1780 *targetpos++ = '.'; targetlen--; 1781 *targetpos++ = '.'; targetlen--; 1782 *targetpos++ = '/'; targetlen--; 1783 break; 1784 case UDF_PATH_COMP_CURDIR : 1785 /* XXX should check for l_ci; bugcompatible now */ 1786 if (targetlen < 2) { 1787 error = EINVAL; 1788 break; 1789 } 1790 *targetpos++ = '.'; targetlen--; 1791 *targetpos++ = '/'; targetlen--; 1792 break; 1793 case UDF_PATH_COMP_NAME : 1794 if (l_ci == 0) { 1795 error = EINVAL; 1796 break; 1797 } 1798 memset(tmpname, 0, PATH_MAX); 1799 memcpy(&pathcomp, pathpos, len + l_ci); 1800 udf_to_unix_name(tmpname, MAXPATHLEN, 1801 pathcomp.ident, l_ci, 1802 &udf_node->ump->logical_vol->desc_charset); 1803 namelen = strlen(tmpname); 1804 if (targetlen < namelen + 1) { 1805 error = EINVAL; 1806 break; 1807 } 1808 memcpy(targetpos, tmpname, namelen); 1809 targetpos += namelen; targetlen -= namelen; 1810 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1811 /* more follows, so must be directory */ 1812 *targetpos++ = '/'; targetlen--; 1813 } 1814 break; 1815 default : 1816 error = EINVAL; 1817 break; 1818 } 1819 first = 0; 1820 if (error) 1821 break; 1822 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1823 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1824 1825 } 1826 /* all processed? */ 1827 if (vattr.va_size - pathlen > 0) 1828 error = EINVAL; 1829 1830 /* uiomove() to destination */ 1831 if (!error) 1832 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1833 1834 free(pathbuf, M_UDFTEMP); 1835 free(targetbuf, M_UDFTEMP); 1836 free(tmpname, M_UDFTEMP); 1837 1838 return error; 1839 } 1840 1841 /* --------------------------------------------------------------------- */ 1842 1843 /* 1844 * Check if source directory is in the path of the target directory. Target 1845 * is supplied locked, source is unlocked. The target is always vput before 1846 * returning. Modeled after UFS. 1847 * 1848 * If source is on the path from target to the root, return error. 1849 */ 1850 1851 static int 1852 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1853 { 1854 struct udf_mount *ump = target->ump; 1855 struct udf_node *res_node; 1856 struct long_ad icb_loc, *root_icb; 1857 const char *name; 1858 int namelen; 1859 int error, found; 1860 1861 name = ".."; 1862 namelen = 2; 1863 error = 0; 1864 res_node = target; 1865 1866 root_icb = &ump->fileset_desc->rootdir_icb; 1867 1868 /* if nodes are equal, it is no use looking */ 1869 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1870 error = EEXIST; 1871 goto out; 1872 } 1873 1874 /* nothing can exist before the root */ 1875 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1876 error = 0; 1877 goto out; 1878 } 1879 1880 for (;;) { 1881 DPRINTF(NODE, ("udf_on_rootpath : " 1882 "source vp %p, looking at vp %p\n", 1883 source->vnode, res_node->vnode)); 1884 1885 /* sanity check */ 1886 if (res_node->vnode->v_type != VDIR) { 1887 error = ENOTDIR; 1888 goto out; 1889 } 1890 1891 /* go down one level */ 1892 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1893 &icb_loc, &found); 1894 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1895 "found %d\n", error, found)); 1896 1897 if (!found) 1898 error = ENOENT; 1899 if (error) 1900 goto out; 1901 1902 /* did we encounter source node? */ 1903 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1904 error = EINVAL; 1905 goto out; 1906 } 1907 1908 /* did we encounter the root node? */ 1909 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1910 error = 0; 1911 goto out; 1912 } 1913 1914 /* push our intermediate node, we're done with it */ 1915 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1916 vput(res_node->vnode); 1917 1918 DPRINTF(NODE, ("\tgetting the .. node\n")); 1919 error = udf_get_node(ump, &icb_loc, &res_node); 1920 1921 if (error) { /* argh, bail out */ 1922 KASSERT(res_node == NULL); 1923 // res_node = NULL; 1924 goto out; 1925 } 1926 } 1927 out: 1928 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1929 1930 /* put our last node */ 1931 if (res_node) 1932 vput(res_node->vnode); 1933 1934 return error; 1935 } 1936 1937 /* note: i tried to follow the logics of the tmpfs rename code */ 1938 int 1939 udf_rename(void *v) 1940 { 1941 struct vop_rename_args /* { 1942 struct vnode *a_fdvp; 1943 struct vnode *a_fvp; 1944 struct componentname *a_fcnp; 1945 struct vnode *a_tdvp; 1946 struct vnode *a_tvp; 1947 struct componentname *a_tcnp; 1948 } */ *ap = v; 1949 struct vnode *tvp = ap->a_tvp; 1950 struct vnode *tdvp = ap->a_tdvp; 1951 struct vnode *fvp = ap->a_fvp; 1952 struct vnode *fdvp = ap->a_fdvp; 1953 struct componentname *tcnp = ap->a_tcnp; 1954 struct componentname *fcnp = ap->a_fcnp; 1955 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1956 struct vattr fvap, tvap; 1957 int error; 1958 1959 DPRINTF(CALL, ("udf_rename called\n")); 1960 1961 /* disallow cross-device renames */ 1962 if (fvp->v_mount != tdvp->v_mount || 1963 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1964 error = EXDEV; 1965 goto out_unlocked; 1966 } 1967 1968 fnode = VTOI(fvp); 1969 fdnode = VTOI(fdvp); 1970 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1971 tdnode = VTOI(tdvp); 1972 1973 /* lock our source dir */ 1974 if (fdnode != tdnode) { 1975 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1976 if (error != 0) 1977 goto out_unlocked; 1978 } 1979 1980 /* get info about the node to be moved */ 1981 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1982 KASSERT(error == 0); 1983 1984 /* check when to delete the old already existing entry */ 1985 if (tvp) { 1986 /* get info about the node to be moved to */ 1987 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1988 KASSERT(error == 0); 1989 1990 /* if both dirs, make sure the destination is empty */ 1991 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1992 if (tvap.va_nlink > 2) { 1993 error = ENOTEMPTY; 1994 goto out; 1995 } 1996 } 1997 /* if moving dir, make sure destination is dir too */ 1998 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1999 error = ENOTDIR; 2000 goto out; 2001 } 2002 /* if we're moving a non-directory, make sure dest is no dir */ 2003 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2004 error = EISDIR; 2005 goto out; 2006 } 2007 } 2008 2009 /* check if moving a directory to a new parent is allowed */ 2010 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2011 /* release tvp since we might encounter it and lock up */ 2012 if (tvp) 2013 vput(tvp); 2014 2015 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2016 vref(tdvp); 2017 2018 /* search if fnode is a component of tdnode's path to root */ 2019 error = udf_on_rootpath(fnode, tdnode); 2020 2021 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2022 2023 if (error) { 2024 /* compensate for our vref earlier */ 2025 vrele(tdvp); 2026 goto out; 2027 } 2028 2029 /* relock tdvp; its still here due to the vref earlier */ 2030 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2031 2032 /* 2033 * re-lookup tvp since the parent has been unlocked, so could 2034 * have changed/removed in the meantime. 2035 */ 2036 error = relookup(tdvp, &tvp, tcnp, 0); 2037 if (error) { 2038 vput(tdvp); 2039 goto out; 2040 } 2041 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2042 } 2043 2044 /* remove existing entry if present */ 2045 if (tvp) 2046 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2047 2048 /* create new directory entry for the node */ 2049 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2050 if (error) 2051 goto out; 2052 2053 /* unlink old directory entry for the node, if failing, unattach new */ 2054 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2055 if (error) 2056 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2057 if (error) 2058 goto out; 2059 2060 /* update tnode's '..' if moving directory to new parent */ 2061 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2062 /* update fnode's '..' entry */ 2063 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2064 if (error) { 2065 /* 'try' to recover from this situation */ 2066 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2067 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2068 } 2069 } 2070 2071 out: 2072 if (fdnode != tdnode) 2073 VOP_UNLOCK(fdvp); 2074 2075 out_unlocked: 2076 VOP_ABORTOP(tdvp, tcnp); 2077 if (tdvp == tvp) 2078 vrele(tdvp); 2079 else 2080 vput(tdvp); 2081 if (tvp) 2082 vput(tvp); 2083 VOP_ABORTOP(fdvp, fcnp); 2084 2085 /* release source nodes. */ 2086 vrele(fdvp); 2087 vrele(fvp); 2088 2089 return error; 2090 } 2091 2092 /* --------------------------------------------------------------------- */ 2093 2094 int 2095 udf_remove(void *v) 2096 { 2097 struct vop_remove_args /* { 2098 struct vnode *a_dvp; 2099 struct vnode *a_vp; 2100 struct componentname *a_cnp; 2101 } */ *ap = v; 2102 struct vnode *dvp = ap->a_dvp; 2103 struct vnode *vp = ap->a_vp; 2104 struct componentname *cnp = ap->a_cnp; 2105 struct udf_node *dir_node = VTOI(dvp); 2106 struct udf_node *udf_node = VTOI(vp); 2107 struct udf_mount *ump = dir_node->ump; 2108 int error; 2109 2110 DPRINTF(CALL, ("udf_remove called\n")); 2111 if (vp->v_type != VDIR) { 2112 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2113 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2114 } else { 2115 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2116 error = EPERM; 2117 } 2118 2119 if (error == 0) { 2120 VN_KNOTE(vp, NOTE_DELETE); 2121 VN_KNOTE(dvp, NOTE_WRITE); 2122 } 2123 2124 if (dvp == vp) 2125 vrele(vp); 2126 else 2127 vput(vp); 2128 vput(dvp); 2129 2130 return error; 2131 } 2132 2133 /* --------------------------------------------------------------------- */ 2134 2135 int 2136 udf_rmdir(void *v) 2137 { 2138 struct vop_rmdir_args /* { 2139 struct vnode *a_dvp; 2140 struct vnode *a_vp; 2141 struct componentname *a_cnp; 2142 } */ *ap = v; 2143 struct vnode *vp = ap->a_vp; 2144 struct vnode *dvp = ap->a_dvp; 2145 struct componentname *cnp = ap->a_cnp; 2146 struct udf_node *dir_node = VTOI(dvp); 2147 struct udf_node *udf_node = VTOI(vp); 2148 struct udf_mount *ump = dir_node->ump; 2149 int refcnt, error; 2150 2151 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2152 2153 /* don't allow '.' to be deleted */ 2154 if (dir_node == udf_node) { 2155 vrele(dvp); 2156 vput(vp); 2157 return EINVAL; 2158 } 2159 2160 /* check to see if the directory is empty */ 2161 error = 0; 2162 if (dir_node->fe) { 2163 refcnt = udf_rw16(udf_node->fe->link_cnt); 2164 } else { 2165 refcnt = udf_rw16(udf_node->efe->link_cnt); 2166 } 2167 if (refcnt > 1) { 2168 /* NOT empty */ 2169 vput(dvp); 2170 vput(vp); 2171 return ENOTEMPTY; 2172 } 2173 2174 /* detach the node from the directory */ 2175 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2176 if (error == 0) { 2177 cache_purge(vp); 2178 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2179 VN_KNOTE(vp, NOTE_DELETE); 2180 } 2181 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2182 2183 /* unput the nodes and exit */ 2184 vput(dvp); 2185 vput(vp); 2186 2187 return error; 2188 } 2189 2190 /* --------------------------------------------------------------------- */ 2191 2192 int 2193 udf_fsync(void *v) 2194 { 2195 struct vop_fsync_args /* { 2196 struct vnode *a_vp; 2197 kauth_cred_t a_cred; 2198 int a_flags; 2199 off_t offlo; 2200 off_t offhi; 2201 struct proc *a_p; 2202 } */ *ap = v; 2203 struct vnode *vp = ap->a_vp; 2204 struct udf_node *udf_node = VTOI(vp); 2205 int error, flags, wait; 2206 2207 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2208 udf_node, 2209 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2210 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2211 2212 /* flush data and wait for it when requested */ 2213 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2214 error = vflushbuf(vp, wait); 2215 if (error) 2216 return error; 2217 2218 if (udf_node == NULL) { 2219 printf("udf_fsync() called on NULL udf_node!\n"); 2220 return 0; 2221 } 2222 if (vp->v_tag != VT_UDF) { 2223 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2224 return 0; 2225 } 2226 2227 /* set our times */ 2228 udf_itimes(udf_node, NULL, NULL, NULL); 2229 2230 /* if called when mounted readonly, never write back */ 2231 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2232 return 0; 2233 2234 /* if only data is requested, return */ 2235 if (ap->a_flags & FSYNC_DATAONLY) 2236 return 0; 2237 2238 /* check if the node is dirty 'enough'*/ 2239 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2240 if (flags == 0) 2241 return 0; 2242 2243 /* if we don't have to wait, check for IO pending */ 2244 if (!wait) { 2245 if (vp->v_numoutput > 0) { 2246 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2247 return 0; 2248 } 2249 if (udf_node->outstanding_bufs > 0) { 2250 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2251 return 0; 2252 } 2253 if (udf_node->outstanding_nodedscr > 0) { 2254 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2255 return 0; 2256 } 2257 } 2258 2259 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2260 if (wait) { 2261 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2262 mutex_enter(vp->v_interlock); 2263 while (vp->v_numoutput) { 2264 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2265 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2266 } 2267 mutex_exit(vp->v_interlock); 2268 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2269 } 2270 2271 /* write out node and wait for it if requested */ 2272 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2273 error = udf_writeout_node(udf_node, wait); 2274 if (error) 2275 return error; 2276 2277 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2278 2279 return 0; 2280 } 2281 2282 /* --------------------------------------------------------------------- */ 2283 2284 int 2285 udf_advlock(void *v) 2286 { 2287 struct vop_advlock_args /* { 2288 struct vnode *a_vp; 2289 void *a_id; 2290 int a_op; 2291 struct flock *a_fl; 2292 int a_flags; 2293 } */ *ap = v; 2294 struct vnode *vp = ap->a_vp; 2295 struct udf_node *udf_node = VTOI(vp); 2296 struct file_entry *fe; 2297 struct extfile_entry *efe; 2298 uint64_t file_size; 2299 2300 DPRINTF(LOCKING, ("udf_advlock called\n")); 2301 2302 /* get directory filesize */ 2303 if (udf_node->fe) { 2304 fe = udf_node->fe; 2305 file_size = udf_rw64(fe->inf_len); 2306 } else { 2307 assert(udf_node->efe); 2308 efe = udf_node->efe; 2309 file_size = udf_rw64(efe->inf_len); 2310 } 2311 2312 return lf_advlock(ap, &udf_node->lockf, file_size); 2313 } 2314 2315 /* --------------------------------------------------------------------- */ 2316 2317 /* Global vfs vnode data structures for udfs */ 2318 int (**udf_vnodeop_p)(void *); 2319 2320 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2321 { &vop_default_desc, vn_default_error }, 2322 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2323 { &vop_create_desc, udf_create }, /* create */ 2324 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2325 { &vop_open_desc, udf_open }, /* open */ 2326 { &vop_close_desc, udf_close }, /* close */ 2327 { &vop_access_desc, udf_access }, /* access */ 2328 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2329 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2330 { &vop_read_desc, udf_read }, /* read */ 2331 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2332 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2333 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2334 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2335 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2336 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2337 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2338 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2339 { &vop_seek_desc, genfs_seek }, /* seek */ 2340 { &vop_remove_desc, udf_remove }, /* remove */ 2341 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2342 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2343 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2344 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2345 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2346 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2347 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2348 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2349 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2350 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2351 { &vop_lock_desc, genfs_lock }, /* lock */ 2352 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2353 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2354 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2355 /* { &vop_print_desc, udf_print }, */ /* print */ 2356 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2357 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2358 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2359 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2360 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2361 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2362 { NULL, NULL } 2363 }; 2364 2365 2366 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2367 &udf_vnodeop_p, udf_vnodeop_entries 2368 }; 2369 2370