1 /* $NetBSD: udf_vnops.c,v 1.64 2011/04/26 11:32:39 hannken 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 1.64 2011/04/26 11:32:39 hannken 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 /* purge old data from namei */ 163 cache_purge(vp); 164 165 /* dispose all node knowledge */ 166 udf_dispose_node(udf_node); 167 168 return 0; 169 } 170 171 /* --------------------------------------------------------------------- */ 172 173 int 174 udf_read(void *v) 175 { 176 struct vop_read_args /* { 177 struct vnode *a_vp; 178 struct uio *a_uio; 179 int a_ioflag; 180 kauth_cred_t a_cred; 181 } */ *ap = v; 182 struct vnode *vp = ap->a_vp; 183 struct uio *uio = ap->a_uio; 184 int ioflag = ap->a_ioflag; 185 int advice = IO_ADV_DECODE(ap->a_ioflag); 186 struct uvm_object *uobj; 187 struct udf_node *udf_node = VTOI(vp); 188 struct file_entry *fe; 189 struct extfile_entry *efe; 190 uint64_t file_size; 191 vsize_t len; 192 int error; 193 194 /* 195 * XXX reading from extended attributes not yet implemented. FreeBSD 196 * has it in mind to forward the IO_EXT read call to the 197 * VOP_READEXTATTR(). 198 */ 199 200 DPRINTF(READ, ("udf_read called\n")); 201 202 /* can this happen? some filingsystems have this check */ 203 if (uio->uio_offset < 0) 204 return EINVAL; 205 if (uio->uio_resid == 0) 206 return 0; 207 208 /* protect against rogue programs reading raw directories and links */ 209 if ((ioflag & IO_ALTSEMANTICS) == 0) { 210 if (vp->v_type == VDIR) 211 return EISDIR; 212 /* all but regular files just give EINVAL */ 213 if (vp->v_type != VREG) 214 return EINVAL; 215 } 216 217 assert(udf_node); 218 assert(udf_node->fe || udf_node->efe); 219 220 /* get file/directory filesize */ 221 if (udf_node->fe) { 222 fe = udf_node->fe; 223 file_size = udf_rw64(fe->inf_len); 224 } else { 225 assert(udf_node->efe); 226 efe = udf_node->efe; 227 file_size = udf_rw64(efe->inf_len); 228 } 229 230 /* read contents using buffercache */ 231 uobj = &vp->v_uobj; 232 error = 0; 233 while (uio->uio_resid > 0) { 234 /* reached end? */ 235 if (file_size <= uio->uio_offset) 236 break; 237 238 /* maximise length to file extremity */ 239 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 240 if (len == 0) 241 break; 242 243 /* ubc, here we come, prepare to trap */ 244 error = ubc_uiomove(uobj, uio, len, advice, 245 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 246 if (error) 247 break; 248 } 249 250 /* note access time unless not requested */ 251 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 252 udf_node->i_flags |= IN_ACCESS; 253 if ((ioflag & IO_SYNC) == IO_SYNC) 254 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 255 } 256 257 return error; 258 } 259 260 /* --------------------------------------------------------------------- */ 261 262 int 263 udf_write(void *v) 264 { 265 struct vop_write_args /* { 266 struct vnode *a_vp; 267 struct uio *a_uio; 268 int a_ioflag; 269 kauth_cred_t a_cred; 270 } */ *ap = v; 271 struct vnode *vp = ap->a_vp; 272 struct uio *uio = ap->a_uio; 273 int ioflag = ap->a_ioflag; 274 kauth_cred_t cred = ap->a_cred; 275 int advice = IO_ADV_DECODE(ap->a_ioflag); 276 struct uvm_object *uobj; 277 struct udf_node *udf_node = VTOI(vp); 278 struct file_entry *fe; 279 struct extfile_entry *efe; 280 uint64_t file_size, old_size, old_offset; 281 vsize_t len; 282 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 283 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 284 int error; 285 int resid, extended; 286 287 /* 288 * XXX writing to extended attributes not yet implemented. FreeBSD has 289 * it in mind to forward the IO_EXT read call to the 290 * VOP_READEXTATTR(). 291 */ 292 293 DPRINTF(WRITE, ("udf_write called\n")); 294 295 /* can this happen? some filingsystems have this check */ 296 if (uio->uio_offset < 0) 297 return EINVAL; 298 if (uio->uio_resid == 0) 299 return 0; 300 301 /* protect against rogue programs writing raw directories or links */ 302 if ((ioflag & IO_ALTSEMANTICS) == 0) { 303 if (vp->v_type == VDIR) 304 return EISDIR; 305 /* all but regular files just give EINVAL for now */ 306 if (vp->v_type != VREG) 307 return EINVAL; 308 } 309 310 assert(udf_node); 311 assert(udf_node->fe || udf_node->efe); 312 313 /* get file/directory filesize */ 314 if (udf_node->fe) { 315 fe = udf_node->fe; 316 file_size = udf_rw64(fe->inf_len); 317 } else { 318 assert(udf_node->efe); 319 efe = udf_node->efe; 320 file_size = udf_rw64(efe->inf_len); 321 } 322 old_size = file_size; 323 324 /* if explicitly asked to append, uio_offset can be wrong? */ 325 if (ioflag & IO_APPEND) 326 uio->uio_offset = file_size; 327 328 extended = (uio->uio_offset + uio->uio_resid > file_size); 329 if (extended) { 330 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 331 file_size, uio->uio_offset + uio->uio_resid)); 332 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 333 if (error) 334 return error; 335 file_size = uio->uio_offset + uio->uio_resid; 336 } 337 338 /* write contents using buffercache */ 339 uobj = &vp->v_uobj; 340 resid = uio->uio_resid; 341 error = 0; 342 343 uvm_vnp_setwritesize(vp, file_size); 344 old_offset = uio->uio_offset; 345 while (uio->uio_resid > 0) { 346 /* maximise length to file extremity */ 347 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 348 if (len == 0) 349 break; 350 351 genfs_node_wrlock(vp); 352 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 353 genfs_node_unlock(vp); 354 if (error) 355 break; 356 357 /* ubc, here we come, prepare to trap */ 358 error = ubc_uiomove(uobj, uio, len, advice, 359 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 360 if (error) 361 break; 362 363 /* 364 * flush what we just wrote if necessary. 365 * XXXUBC simplistic async flushing. 366 * 367 * Directories are excluded since its file data that we want 368 * to purge. 369 */ 370 if (!async && (vp->v_type != VDIR) && 371 (old_offset >> 16 != uio->uio_offset >> 16)) { 372 mutex_enter(&vp->v_interlock); 373 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 374 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 375 old_offset = uio->uio_offset; 376 } 377 } 378 uvm_vnp_setsize(vp, file_size); 379 380 /* mark node changed and request update */ 381 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 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 ((cnp->cn_flags & MAKEENTRY) && 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 = genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid); 975 if (error) 976 return (error); 977 978 /* change the ownership */ 979 udf_setownership(udf_node, new_uid, new_gid); 980 981 /* mark node changed */ 982 udf_node->i_flags |= IN_CHANGE; 983 984 return 0; 985 } 986 987 988 static int 989 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 990 { 991 struct udf_node *udf_node = VTOI(vp); 992 uid_t uid; 993 gid_t gid; 994 int error; 995 996 #ifdef notyet 997 /* TODO get vaflags from the extended attributes? */ 998 /* Immutable or append-only files cannot be modified, either. */ 999 if (udf_node->flags & (IMMUTABLE | APPEND)) 1000 return EPERM; 1001 #endif 1002 1003 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1004 return EROFS; 1005 1006 /* retrieve uid/gid values */ 1007 udf_getownership(udf_node, &uid, &gid); 1008 1009 /* check permissions */ 1010 error = genfs_can_chmod(vp, cred, uid, gid, mode); 1011 if (error) 1012 return (error); 1013 1014 /* change mode */ 1015 udf_setaccessmode(udf_node, mode); 1016 1017 /* mark node changed */ 1018 udf_node->i_flags |= IN_CHANGE; 1019 1020 return 0; 1021 } 1022 1023 1024 /* exported */ 1025 int 1026 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1027 { 1028 struct udf_node *udf_node = VTOI(vp); 1029 int error, extended; 1030 1031 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1032 return EROFS; 1033 1034 /* Decide whether this is a valid operation based on the file type. */ 1035 switch (vp->v_type) { 1036 case VDIR: 1037 return EISDIR; 1038 case VREG: 1039 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1040 return EROFS; 1041 break; 1042 case VBLK: 1043 /* FALLTHROUGH */ 1044 case VCHR: 1045 /* FALLTHROUGH */ 1046 case VFIFO: 1047 /* Allow modifications of special files even if in the file 1048 * system is mounted read-only (we are not modifying the 1049 * files themselves, but the objects they represent). */ 1050 return 0; 1051 default: 1052 /* Anything else is unsupported. */ 1053 return EOPNOTSUPP; 1054 } 1055 1056 #if notyet 1057 /* TODO get vaflags from the extended attributes? */ 1058 /* Immutable or append-only files cannot be modified, either. */ 1059 if (node->flags & (IMMUTABLE | APPEND)) 1060 return EPERM; 1061 #endif 1062 1063 /* resize file to the requested size */ 1064 error = udf_resize_node(udf_node, newsize, &extended); 1065 1066 if (error == 0) { 1067 /* mark change */ 1068 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1069 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1070 udf_update(vp, NULL, NULL, NULL, 0); 1071 } 1072 1073 return error; 1074 } 1075 1076 1077 static int 1078 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1079 { 1080 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1081 return EROFS; 1082 1083 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1084 1085 return 0; 1086 } 1087 1088 1089 static int 1090 udf_chtimes(struct vnode *vp, 1091 struct timespec *atime, struct timespec *mtime, 1092 struct timespec *birthtime, int setattrflags, 1093 kauth_cred_t cred) 1094 { 1095 struct udf_node *udf_node = VTOI(vp); 1096 uid_t uid; 1097 gid_t gid; 1098 int error; 1099 1100 #ifdef notyet 1101 /* TODO get vaflags from the extended attributes? */ 1102 /* Immutable or append-only files cannot be modified, either. */ 1103 if (udf_node->flags & (IMMUTABLE | APPEND)) 1104 return EPERM; 1105 #endif 1106 1107 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1108 return EROFS; 1109 1110 /* retrieve uid/gid values */ 1111 udf_getownership(udf_node, &uid, &gid); 1112 1113 /* check permissions */ 1114 error = genfs_can_chtimes(vp, setattrflags, uid, cred); 1115 if (error) 1116 return (error); 1117 1118 /* update node flags depending on what times are passed */ 1119 if (atime->tv_sec != VNOVAL) 1120 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1121 udf_node->i_flags |= IN_ACCESS; 1122 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1123 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1124 1125 return udf_update(vp, atime, mtime, birthtime, 0); 1126 } 1127 1128 1129 int 1130 udf_setattr(void *v) 1131 { 1132 struct vop_setattr_args /* { 1133 struct vnode *a_vp; 1134 struct vattr *a_vap; 1135 kauth_cred_t a_cred; 1136 struct lwp *a_l; 1137 } */ *ap = v; 1138 struct vnode *vp = ap->a_vp; 1139 /* struct udf_node *udf_node = VTOI(vp); */ 1140 /* struct udf_mount *ump = udf_node->ump; */ 1141 kauth_cred_t cred = ap->a_cred; 1142 struct vattr *vap = ap->a_vap; 1143 int error; 1144 1145 DPRINTF(CALL, ("udf_setattr called\n")); 1146 1147 /* Abort if any unsettable attribute is given. */ 1148 error = 0; 1149 if (vap->va_type != VNON || 1150 vap->va_nlink != VNOVAL || 1151 vap->va_fsid != VNOVAL || 1152 vap->va_fileid != VNOVAL || 1153 vap->va_blocksize != VNOVAL || 1154 #ifdef notyet 1155 /* checks are debated */ 1156 vap->va_ctime.tv_sec != VNOVAL || 1157 vap->va_ctime.tv_nsec != VNOVAL || 1158 vap->va_birthtime.tv_sec != VNOVAL || 1159 vap->va_birthtime.tv_nsec != VNOVAL || 1160 #endif 1161 vap->va_gen != VNOVAL || 1162 vap->va_rdev != VNOVAL || 1163 vap->va_bytes != VNOVAL) 1164 error = EINVAL; 1165 1166 DPRINTF(ATTR, ("setattr changing:\n")); 1167 if (error == 0 && (vap->va_flags != VNOVAL)) { 1168 DPRINTF(ATTR, ("\tchflags\n")); 1169 error = udf_chflags(vp, vap->va_flags, cred); 1170 } 1171 1172 if (error == 0 && (vap->va_size != VNOVAL)) { 1173 DPRINTF(ATTR, ("\tchsize\n")); 1174 error = udf_chsize(vp, vap->va_size, cred); 1175 } 1176 1177 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1178 DPRINTF(ATTR, ("\tchown\n")); 1179 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1180 } 1181 1182 if (error == 0 && (vap->va_mode != VNOVAL)) { 1183 DPRINTF(ATTR, ("\tchmod\n")); 1184 error = udf_chmod(vp, vap->va_mode, cred); 1185 } 1186 1187 if (error == 0 && 1188 ((vap->va_atime.tv_sec != VNOVAL && 1189 vap->va_atime.tv_nsec != VNOVAL) || 1190 (vap->va_mtime.tv_sec != VNOVAL && 1191 vap->va_mtime.tv_nsec != VNOVAL)) 1192 ) { 1193 DPRINTF(ATTR, ("\tchtimes\n")); 1194 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1195 &vap->va_birthtime, vap->va_vaflags, cred); 1196 } 1197 VN_KNOTE(vp, NOTE_ATTRIB); 1198 1199 return error; 1200 } 1201 1202 /* --------------------------------------------------------------------- */ 1203 1204 /* 1205 * Return POSIX pathconf information for UDF file systems. 1206 */ 1207 int 1208 udf_pathconf(void *v) 1209 { 1210 struct vop_pathconf_args /* { 1211 struct vnode *a_vp; 1212 int a_name; 1213 register_t *a_retval; 1214 } */ *ap = v; 1215 uint32_t bits; 1216 1217 DPRINTF(CALL, ("udf_pathconf called\n")); 1218 1219 switch (ap->a_name) { 1220 case _PC_LINK_MAX: 1221 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1222 return 0; 1223 case _PC_NAME_MAX: 1224 *ap->a_retval = NAME_MAX; 1225 return 0; 1226 case _PC_PATH_MAX: 1227 *ap->a_retval = PATH_MAX; 1228 return 0; 1229 case _PC_PIPE_BUF: 1230 *ap->a_retval = PIPE_BUF; 1231 return 0; 1232 case _PC_CHOWN_RESTRICTED: 1233 *ap->a_retval = 1; 1234 return 0; 1235 case _PC_NO_TRUNC: 1236 *ap->a_retval = 1; 1237 return 0; 1238 case _PC_SYNC_IO: 1239 *ap->a_retval = 0; /* synchronised is off for performance */ 1240 return 0; 1241 case _PC_FILESIZEBITS: 1242 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1243 bits = 64; /* XXX ought to deliver 65 */ 1244 #if 0 1245 if (udf_node) 1246 bits = 64 * vp->v_mount->mnt_dev_bshift; 1247 #endif 1248 *ap->a_retval = bits; 1249 return 0; 1250 } 1251 1252 return EINVAL; 1253 } 1254 1255 1256 /* --------------------------------------------------------------------- */ 1257 1258 int 1259 udf_open(void *v) 1260 { 1261 struct vop_open_args /* { 1262 struct vnode *a_vp; 1263 int a_mode; 1264 kauth_cred_t a_cred; 1265 struct proc *a_p; 1266 } */ *ap = v; 1267 int flags; 1268 1269 DPRINTF(CALL, ("udf_open called\n")); 1270 1271 /* 1272 * Files marked append-only must be opened for appending. 1273 * TODO: get chflags(2) flags from extened attribute. 1274 */ 1275 flags = 0; 1276 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1277 return (EPERM); 1278 1279 return 0; 1280 } 1281 1282 1283 /* --------------------------------------------------------------------- */ 1284 1285 int 1286 udf_close(void *v) 1287 { 1288 struct vop_close_args /* { 1289 struct vnode *a_vp; 1290 int a_fflag; 1291 kauth_cred_t a_cred; 1292 struct proc *a_p; 1293 } */ *ap = v; 1294 struct vnode *vp = ap->a_vp; 1295 struct udf_node *udf_node = VTOI(vp); 1296 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1297 int error; 1298 1299 DPRINTF(CALL, ("udf_close called\n")); 1300 udf_node = udf_node; /* shut up gcc */ 1301 1302 if (!async && (vp->v_type != VDIR)) { 1303 mutex_enter(&vp->v_interlock); 1304 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1305 if (error) 1306 return error; 1307 } 1308 1309 mutex_enter(&vp->v_interlock); 1310 if (vp->v_usecount > 1) 1311 udf_itimes(udf_node, NULL, NULL, NULL); 1312 mutex_exit(&vp->v_interlock); 1313 1314 return 0; 1315 } 1316 1317 1318 /* --------------------------------------------------------------------- */ 1319 1320 static int 1321 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1322 { 1323 int flags; 1324 1325 /* check if we are allowed to write */ 1326 switch (vap->va_type) { 1327 case VDIR: 1328 case VLNK: 1329 case VREG: 1330 /* 1331 * normal nodes: check if we're on a read-only mounted 1332 * filingsystem and bomb out if we're trying to write. 1333 */ 1334 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1335 return EROFS; 1336 break; 1337 case VBLK: 1338 case VCHR: 1339 case VSOCK: 1340 case VFIFO: 1341 /* 1342 * special nodes: even on read-only mounted filingsystems 1343 * these are allowed to be written to if permissions allow. 1344 */ 1345 break; 1346 default: 1347 /* no idea what this is */ 1348 return EINVAL; 1349 } 1350 1351 /* noone may write immutable files */ 1352 /* TODO: get chflags(2) flags from extened attribute. */ 1353 flags = 0; 1354 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1355 return EPERM; 1356 1357 return 0; 1358 } 1359 1360 static int 1361 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1362 kauth_cred_t cred) 1363 { 1364 1365 /* ask the generic genfs_can_access to advice on security */ 1366 return genfs_can_access(vp->v_type, 1367 vap->va_mode, vap->va_uid, vap->va_gid, 1368 mode, cred); 1369 } 1370 1371 int 1372 udf_access(void *v) 1373 { 1374 struct vop_access_args /* { 1375 struct vnode *a_vp; 1376 int a_mode; 1377 kauth_cred_t a_cred; 1378 struct proc *a_p; 1379 } */ *ap = v; 1380 struct vnode *vp = ap->a_vp; 1381 mode_t mode = ap->a_mode; 1382 kauth_cred_t cred = ap->a_cred; 1383 /* struct udf_node *udf_node = VTOI(vp); */ 1384 struct vattr vap; 1385 int error; 1386 1387 DPRINTF(CALL, ("udf_access called\n")); 1388 1389 error = VOP_GETATTR(vp, &vap, NULL); 1390 if (error) 1391 return error; 1392 1393 error = udf_check_possible(vp, &vap, mode); 1394 if (error) 1395 return error; 1396 1397 error = udf_check_permitted(vp, &vap, mode, cred); 1398 1399 return error; 1400 } 1401 1402 /* --------------------------------------------------------------------- */ 1403 1404 int 1405 udf_create(void *v) 1406 { 1407 struct vop_create_args /* { 1408 struct vnode *a_dvp; 1409 struct vnode **a_vpp; 1410 struct componentname *a_cnp; 1411 struct vattr *a_vap; 1412 } */ *ap = v; 1413 struct vnode *dvp = ap->a_dvp; 1414 struct vnode **vpp = ap->a_vpp; 1415 struct vattr *vap = ap->a_vap; 1416 struct componentname *cnp = ap->a_cnp; 1417 int error; 1418 1419 DPRINTF(CALL, ("udf_create called\n")); 1420 error = udf_create_node(dvp, vpp, vap, cnp); 1421 1422 vput(dvp); 1423 return error; 1424 } 1425 1426 /* --------------------------------------------------------------------- */ 1427 1428 int 1429 udf_mknod(void *v) 1430 { 1431 struct vop_mknod_args /* { 1432 struct vnode *a_dvp; 1433 struct vnode **a_vpp; 1434 struct componentname *a_cnp; 1435 struct vattr *a_vap; 1436 } */ *ap = v; 1437 struct vnode *dvp = ap->a_dvp; 1438 struct vnode **vpp = ap->a_vpp; 1439 struct vattr *vap = ap->a_vap; 1440 struct componentname *cnp = ap->a_cnp; 1441 int error; 1442 1443 DPRINTF(CALL, ("udf_mknod called\n")); 1444 error = udf_create_node(dvp, vpp, vap, cnp); 1445 1446 vput(dvp); 1447 return error; 1448 } 1449 1450 /* --------------------------------------------------------------------- */ 1451 1452 int 1453 udf_mkdir(void *v) 1454 { 1455 struct vop_mkdir_args /* { 1456 struct vnode *a_dvp; 1457 struct vnode **a_vpp; 1458 struct componentname *a_cnp; 1459 struct vattr *a_vap; 1460 } */ *ap = v; 1461 struct vnode *dvp = ap->a_dvp; 1462 struct vnode **vpp = ap->a_vpp; 1463 struct vattr *vap = ap->a_vap; 1464 struct componentname *cnp = ap->a_cnp; 1465 int error; 1466 1467 DPRINTF(CALL, ("udf_mkdir called\n")); 1468 error = udf_create_node(dvp, vpp, vap, cnp); 1469 1470 vput(dvp); 1471 return error; 1472 } 1473 1474 /* --------------------------------------------------------------------- */ 1475 1476 static int 1477 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1478 { 1479 struct udf_node *udf_node, *dir_node; 1480 struct vattr vap; 1481 int error; 1482 1483 DPRINTF(CALL, ("udf_link called\n")); 1484 KASSERT(dvp != vp); 1485 KASSERT(vp->v_type != VDIR); 1486 KASSERT(dvp->v_mount == vp->v_mount); 1487 1488 /* lock node */ 1489 error = vn_lock(vp, LK_EXCLUSIVE); 1490 if (error) 1491 return error; 1492 1493 /* get attributes */ 1494 dir_node = VTOI(dvp); 1495 udf_node = VTOI(vp); 1496 1497 error = VOP_GETATTR(vp, &vap, FSCRED); 1498 if (error) { 1499 VOP_UNLOCK(vp); 1500 return error; 1501 } 1502 1503 /* check link count overflow */ 1504 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1505 VOP_UNLOCK(vp); 1506 return EMLINK; 1507 } 1508 1509 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1510 if (error) 1511 VOP_UNLOCK(vp); 1512 return error; 1513 } 1514 1515 int 1516 udf_link(void *v) 1517 { 1518 struct vop_link_args /* { 1519 struct vnode *a_dvp; 1520 struct vnode *a_vp; 1521 struct componentname *a_cnp; 1522 } */ *ap = v; 1523 struct vnode *dvp = ap->a_dvp; 1524 struct vnode *vp = ap->a_vp; 1525 struct componentname *cnp = ap->a_cnp; 1526 int error; 1527 1528 error = udf_do_link(dvp, vp, cnp); 1529 if (error) 1530 VOP_ABORTOP(dvp, cnp); 1531 1532 VN_KNOTE(vp, NOTE_LINK); 1533 VN_KNOTE(dvp, NOTE_WRITE); 1534 vput(dvp); 1535 1536 return error; 1537 } 1538 1539 /* --------------------------------------------------------------------- */ 1540 1541 static int 1542 udf_do_symlink(struct udf_node *udf_node, char *target) 1543 { 1544 struct pathcomp pathcomp; 1545 uint8_t *pathbuf, *pathpos, *compnamepos; 1546 char *mntonname; 1547 int pathlen, len, compnamelen, mntonnamelen; 1548 int error; 1549 1550 /* process `target' to an UDF structure */ 1551 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1552 pathpos = pathbuf; 1553 pathlen = 0; 1554 1555 if (*target == '/') { 1556 /* symlink starts from the root */ 1557 len = UDF_PATH_COMP_SIZE; 1558 memset(&pathcomp, 0, len); 1559 pathcomp.type = UDF_PATH_COMP_ROOT; 1560 1561 /* check if its mount-point relative! */ 1562 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1563 mntonnamelen = strlen(mntonname); 1564 if (strlen(target) >= mntonnamelen) { 1565 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1566 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1567 target += mntonnamelen; 1568 } 1569 } else { 1570 target++; 1571 } 1572 1573 memcpy(pathpos, &pathcomp, len); 1574 pathpos += len; 1575 pathlen += len; 1576 } 1577 1578 error = 0; 1579 while (*target) { 1580 /* ignore multiple '/' */ 1581 while (*target == '/') { 1582 target++; 1583 } 1584 if (!*target) 1585 break; 1586 1587 /* extract component name */ 1588 compnamelen = 0; 1589 compnamepos = target; 1590 while ((*target) && (*target != '/')) { 1591 target++; 1592 compnamelen++; 1593 } 1594 1595 /* just trunc if too long ?? (security issue) */ 1596 if (compnamelen >= 127) { 1597 error = ENAMETOOLONG; 1598 break; 1599 } 1600 1601 /* convert unix name to UDF name */ 1602 len = sizeof(struct pathcomp); 1603 memset(&pathcomp, 0, len); 1604 pathcomp.type = UDF_PATH_COMP_NAME; 1605 len = UDF_PATH_COMP_SIZE; 1606 1607 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1608 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1609 if ((compnamelen == 1) && (*compnamepos == '.')) 1610 pathcomp.type = UDF_PATH_COMP_CURDIR; 1611 1612 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1613 unix_to_udf_name( 1614 (char *) &pathcomp.ident, &pathcomp.l_ci, 1615 compnamepos, compnamelen, 1616 &udf_node->ump->logical_vol->desc_charset); 1617 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1618 } 1619 1620 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1621 error = ENAMETOOLONG; 1622 break; 1623 } 1624 1625 memcpy(pathpos, &pathcomp, len); 1626 pathpos += len; 1627 pathlen += len; 1628 } 1629 1630 if (error) { 1631 /* aparently too big */ 1632 free(pathbuf, M_UDFTEMP); 1633 return error; 1634 } 1635 1636 error = udf_grow_node(udf_node, pathlen); 1637 if (error) { 1638 /* failed to pregrow node */ 1639 free(pathbuf, M_UDFTEMP); 1640 return error; 1641 } 1642 1643 /* write out structure on the new file */ 1644 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1645 pathbuf, pathlen, 0, 1646 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1647 FSCRED, NULL, NULL); 1648 1649 /* return status of symlink contents writeout */ 1650 free(pathbuf, M_UDFTEMP); 1651 return error; 1652 } 1653 1654 1655 int 1656 udf_symlink(void *v) 1657 { 1658 struct vop_symlink_args /* { 1659 struct vnode *a_dvp; 1660 struct vnode **a_vpp; 1661 struct componentname *a_cnp; 1662 struct vattr *a_vap; 1663 char *a_target; 1664 } */ *ap = v; 1665 struct vnode *dvp = ap->a_dvp; 1666 struct vnode **vpp = ap->a_vpp; 1667 struct vattr *vap = ap->a_vap; 1668 struct componentname *cnp = ap->a_cnp; 1669 struct udf_node *dir_node; 1670 struct udf_node *udf_node; 1671 int error; 1672 1673 DPRINTF(CALL, ("udf_symlink called\n")); 1674 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1675 error = udf_create_node(dvp, vpp, vap, cnp); 1676 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1677 if (!error) { 1678 dir_node = VTOI(dvp); 1679 udf_node = VTOI(*vpp); 1680 KASSERT(udf_node); 1681 error = udf_do_symlink(udf_node, ap->a_target); 1682 if (error) { 1683 /* remove node */ 1684 udf_shrink_node(udf_node, 0); 1685 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1686 } 1687 } 1688 vput(dvp); 1689 return error; 1690 } 1691 1692 /* --------------------------------------------------------------------- */ 1693 1694 int 1695 udf_readlink(void *v) 1696 { 1697 struct vop_readlink_args /* { 1698 struct vnode *a_vp; 1699 struct uio *a_uio; 1700 kauth_cred_t a_cred; 1701 } */ *ap = v; 1702 struct vnode *vp = ap->a_vp; 1703 struct uio *uio = ap->a_uio; 1704 kauth_cred_t cred = ap->a_cred; 1705 struct udf_node *udf_node; 1706 struct pathcomp pathcomp; 1707 struct vattr vattr; 1708 uint8_t *pathbuf, *targetbuf, *tmpname; 1709 uint8_t *pathpos, *targetpos; 1710 char *mntonname; 1711 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1712 int first, error; 1713 1714 DPRINTF(CALL, ("udf_readlink called\n")); 1715 1716 udf_node = VTOI(vp); 1717 error = VOP_GETATTR(vp, &vattr, cred); 1718 if (error) 1719 return error; 1720 1721 /* claim temporary buffers for translation */ 1722 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1723 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1724 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1725 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1726 memset(targetbuf, 0, PATH_MAX); 1727 1728 /* read contents of file in our temporary buffer */ 1729 error = vn_rdwr(UIO_READ, udf_node->vnode, 1730 pathbuf, vattr.va_size, 0, 1731 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1732 FSCRED, NULL, NULL); 1733 if (error) { 1734 /* failed to read in symlink contents */ 1735 free(pathbuf, M_UDFTEMP); 1736 free(targetbuf, M_UDFTEMP); 1737 free(tmpname, M_UDFTEMP); 1738 return error; 1739 } 1740 1741 /* convert to a unix path */ 1742 pathpos = pathbuf; 1743 pathlen = 0; 1744 targetpos = targetbuf; 1745 targetlen = PATH_MAX; 1746 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1747 mntonnamelen = strlen(mntonname); 1748 1749 error = 0; 1750 first = 1; 1751 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1752 len = UDF_PATH_COMP_SIZE; 1753 memcpy(&pathcomp, pathpos, len); 1754 l_ci = pathcomp.l_ci; 1755 switch (pathcomp.type) { 1756 case UDF_PATH_COMP_ROOT : 1757 /* XXX should check for l_ci; bugcompatible now */ 1758 if ((targetlen < 1) || !first) { 1759 error = EINVAL; 1760 break; 1761 } 1762 *targetpos++ = '/'; targetlen--; 1763 break; 1764 case UDF_PATH_COMP_MOUNTROOT : 1765 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1766 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1767 error = EINVAL; 1768 break; 1769 } 1770 memcpy(targetpos, mntonname, mntonnamelen); 1771 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1772 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1773 /* more follows, so must be directory */ 1774 *targetpos++ = '/'; targetlen--; 1775 } 1776 break; 1777 case UDF_PATH_COMP_PARENTDIR : 1778 /* XXX should check for l_ci; bugcompatible now */ 1779 if (targetlen < 3) { 1780 error = EINVAL; 1781 break; 1782 } 1783 *targetpos++ = '.'; targetlen--; 1784 *targetpos++ = '.'; targetlen--; 1785 *targetpos++ = '/'; targetlen--; 1786 break; 1787 case UDF_PATH_COMP_CURDIR : 1788 /* XXX should check for l_ci; bugcompatible now */ 1789 if (targetlen < 2) { 1790 error = EINVAL; 1791 break; 1792 } 1793 *targetpos++ = '.'; targetlen--; 1794 *targetpos++ = '/'; targetlen--; 1795 break; 1796 case UDF_PATH_COMP_NAME : 1797 if (l_ci == 0) { 1798 error = EINVAL; 1799 break; 1800 } 1801 memset(tmpname, 0, PATH_MAX); 1802 memcpy(&pathcomp, pathpos, len + l_ci); 1803 udf_to_unix_name(tmpname, MAXPATHLEN, 1804 pathcomp.ident, l_ci, 1805 &udf_node->ump->logical_vol->desc_charset); 1806 namelen = strlen(tmpname); 1807 if (targetlen < namelen + 1) { 1808 error = EINVAL; 1809 break; 1810 } 1811 memcpy(targetpos, tmpname, namelen); 1812 targetpos += namelen; targetlen -= namelen; 1813 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1814 /* more follows, so must be directory */ 1815 *targetpos++ = '/'; targetlen--; 1816 } 1817 break; 1818 default : 1819 error = EINVAL; 1820 break; 1821 } 1822 first = 0; 1823 if (error) 1824 break; 1825 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1826 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1827 1828 } 1829 /* all processed? */ 1830 if (vattr.va_size - pathlen > 0) 1831 error = EINVAL; 1832 1833 /* uiomove() to destination */ 1834 if (!error) 1835 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1836 1837 free(pathbuf, M_UDFTEMP); 1838 free(targetbuf, M_UDFTEMP); 1839 free(tmpname, M_UDFTEMP); 1840 1841 return error; 1842 } 1843 1844 /* --------------------------------------------------------------------- */ 1845 1846 /* 1847 * Check if source directory is in the path of the target directory. Target 1848 * is supplied locked, source is unlocked. The target is always vput before 1849 * returning. Modeled after UFS. 1850 * 1851 * If source is on the path from target to the root, return error. 1852 */ 1853 1854 static int 1855 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1856 { 1857 struct udf_mount *ump = target->ump; 1858 struct udf_node *res_node; 1859 struct long_ad icb_loc, *root_icb; 1860 const char *name; 1861 int namelen; 1862 int error, found; 1863 1864 name = ".."; 1865 namelen = 2; 1866 error = 0; 1867 res_node = target; 1868 1869 root_icb = &ump->fileset_desc->rootdir_icb; 1870 1871 /* if nodes are equal, it is no use looking */ 1872 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1873 error = EEXIST; 1874 goto out; 1875 } 1876 1877 /* nothing can exist before the root */ 1878 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1879 error = 0; 1880 goto out; 1881 } 1882 1883 for (;;) { 1884 DPRINTF(NODE, ("udf_on_rootpath : " 1885 "source vp %p, looking at vp %p\n", 1886 source->vnode, res_node->vnode)); 1887 1888 /* sanity check */ 1889 if (res_node->vnode->v_type != VDIR) { 1890 error = ENOTDIR; 1891 goto out; 1892 } 1893 1894 /* go down one level */ 1895 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1896 &icb_loc, &found); 1897 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1898 "found %d\n", error, found)); 1899 1900 if (!found) 1901 error = ENOENT; 1902 if (error) 1903 goto out; 1904 1905 /* did we encounter source node? */ 1906 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1907 error = EINVAL; 1908 goto out; 1909 } 1910 1911 /* did we encounter the root node? */ 1912 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1913 error = 0; 1914 goto out; 1915 } 1916 1917 /* push our intermediate node, we're done with it */ 1918 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1919 vput(res_node->vnode); 1920 1921 DPRINTF(NODE, ("\tgetting the .. node\n")); 1922 error = udf_get_node(ump, &icb_loc, &res_node); 1923 1924 if (error) { /* argh, bail out */ 1925 KASSERT(res_node == NULL); 1926 // res_node = NULL; 1927 goto out; 1928 } 1929 } 1930 out: 1931 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1932 1933 /* put our last node */ 1934 if (res_node) 1935 vput(res_node->vnode); 1936 1937 return error; 1938 } 1939 1940 /* note: i tried to follow the logics of the tmpfs rename code */ 1941 int 1942 udf_rename(void *v) 1943 { 1944 struct vop_rename_args /* { 1945 struct vnode *a_fdvp; 1946 struct vnode *a_fvp; 1947 struct componentname *a_fcnp; 1948 struct vnode *a_tdvp; 1949 struct vnode *a_tvp; 1950 struct componentname *a_tcnp; 1951 } */ *ap = v; 1952 struct vnode *tvp = ap->a_tvp; 1953 struct vnode *tdvp = ap->a_tdvp; 1954 struct vnode *fvp = ap->a_fvp; 1955 struct vnode *fdvp = ap->a_fdvp; 1956 struct componentname *tcnp = ap->a_tcnp; 1957 struct componentname *fcnp = ap->a_fcnp; 1958 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1959 struct vattr fvap, tvap; 1960 int error; 1961 1962 DPRINTF(CALL, ("udf_rename called\n")); 1963 1964 /* disallow cross-device renames */ 1965 if (fvp->v_mount != tdvp->v_mount || 1966 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1967 error = EXDEV; 1968 goto out_unlocked; 1969 } 1970 1971 fnode = VTOI(fvp); 1972 fdnode = VTOI(fdvp); 1973 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1974 tdnode = VTOI(tdvp); 1975 1976 /* lock our source dir */ 1977 if (fdnode != tdnode) { 1978 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1979 if (error != 0) 1980 goto out_unlocked; 1981 } 1982 1983 /* get info about the node to be moved */ 1984 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1985 KASSERT(error == 0); 1986 1987 /* check when to delete the old already existing entry */ 1988 if (tvp) { 1989 /* get info about the node to be moved to */ 1990 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1991 KASSERT(error == 0); 1992 1993 /* if both dirs, make sure the destination is empty */ 1994 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1995 if (tvap.va_nlink > 2) { 1996 error = ENOTEMPTY; 1997 goto out; 1998 } 1999 } 2000 /* if moving dir, make sure destination is dir too */ 2001 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2002 error = ENOTDIR; 2003 goto out; 2004 } 2005 /* if we're moving a non-directory, make sure dest is no dir */ 2006 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2007 error = EISDIR; 2008 goto out; 2009 } 2010 } 2011 2012 /* check if moving a directory to a new parent is allowed */ 2013 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2014 /* release tvp since we might encounter it and lock up */ 2015 if (tvp) 2016 vput(tvp); 2017 2018 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2019 vref(tdvp); 2020 2021 /* search if fnode is a component of tdnode's path to root */ 2022 error = udf_on_rootpath(fnode, tdnode); 2023 2024 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2025 2026 if (error) { 2027 /* compensate for our vref earlier */ 2028 vrele(tdvp); 2029 goto out; 2030 } 2031 2032 /* relock tdvp; its still here due to the vref earlier */ 2033 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2034 2035 /* 2036 * re-lookup tvp since the parent has been unlocked, so could 2037 * have changed/removed in the meantime. 2038 */ 2039 error = relookup(tdvp, &tvp, tcnp, 0); 2040 if (error) { 2041 vput(tdvp); 2042 goto out; 2043 } 2044 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2045 } 2046 2047 /* remove existing entry if present */ 2048 if (tvp) 2049 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2050 2051 /* create new directory entry for the node */ 2052 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2053 if (error) 2054 goto out; 2055 2056 /* unlink old directory entry for the node, if failing, unattach new */ 2057 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2058 if (error) 2059 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2060 if (error) 2061 goto out; 2062 2063 /* update tnode's '..' if moving directory to new parent */ 2064 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2065 /* update fnode's '..' entry */ 2066 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2067 if (error) { 2068 /* 'try' to recover from this situation */ 2069 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2070 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2071 } 2072 } 2073 2074 out: 2075 if (fdnode != tdnode) 2076 VOP_UNLOCK(fdvp); 2077 2078 out_unlocked: 2079 VOP_ABORTOP(tdvp, tcnp); 2080 if (tdvp == tvp) 2081 vrele(tdvp); 2082 else 2083 vput(tdvp); 2084 if (tvp) 2085 vput(tvp); 2086 VOP_ABORTOP(fdvp, fcnp); 2087 2088 /* release source nodes. */ 2089 vrele(fdvp); 2090 vrele(fvp); 2091 2092 return error; 2093 } 2094 2095 /* --------------------------------------------------------------------- */ 2096 2097 int 2098 udf_remove(void *v) 2099 { 2100 struct vop_remove_args /* { 2101 struct vnode *a_dvp; 2102 struct vnode *a_vp; 2103 struct componentname *a_cnp; 2104 } */ *ap = v; 2105 struct vnode *dvp = ap->a_dvp; 2106 struct vnode *vp = ap->a_vp; 2107 struct componentname *cnp = ap->a_cnp; 2108 struct udf_node *dir_node = VTOI(dvp); 2109 struct udf_node *udf_node = VTOI(vp); 2110 struct udf_mount *ump = dir_node->ump; 2111 int error; 2112 2113 DPRINTF(CALL, ("udf_remove called\n")); 2114 if (vp->v_type != VDIR) { 2115 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2116 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2117 } else { 2118 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2119 error = EPERM; 2120 } 2121 2122 if (error == 0) { 2123 VN_KNOTE(vp, NOTE_DELETE); 2124 VN_KNOTE(dvp, NOTE_WRITE); 2125 } 2126 2127 if (dvp == vp) 2128 vrele(vp); 2129 else 2130 vput(vp); 2131 vput(dvp); 2132 2133 return error; 2134 } 2135 2136 /* --------------------------------------------------------------------- */ 2137 2138 int 2139 udf_rmdir(void *v) 2140 { 2141 struct vop_rmdir_args /* { 2142 struct vnode *a_dvp; 2143 struct vnode *a_vp; 2144 struct componentname *a_cnp; 2145 } */ *ap = v; 2146 struct vnode *vp = ap->a_vp; 2147 struct vnode *dvp = ap->a_dvp; 2148 struct componentname *cnp = ap->a_cnp; 2149 struct udf_node *dir_node = VTOI(dvp); 2150 struct udf_node *udf_node = VTOI(vp); 2151 struct udf_mount *ump = dir_node->ump; 2152 int refcnt, error; 2153 2154 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2155 2156 /* don't allow '.' to be deleted */ 2157 if (dir_node == udf_node) { 2158 vrele(dvp); 2159 vput(vp); 2160 return EINVAL; 2161 } 2162 2163 /* check to see if the directory is empty */ 2164 error = 0; 2165 if (dir_node->fe) { 2166 refcnt = udf_rw16(udf_node->fe->link_cnt); 2167 } else { 2168 refcnt = udf_rw16(udf_node->efe->link_cnt); 2169 } 2170 if (refcnt > 1) { 2171 /* NOT empty */ 2172 vput(dvp); 2173 vput(vp); 2174 return ENOTEMPTY; 2175 } 2176 2177 /* detach the node from the directory */ 2178 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2179 if (error == 0) { 2180 cache_purge(vp); 2181 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2182 VN_KNOTE(vp, NOTE_DELETE); 2183 } 2184 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2185 2186 /* unput the nodes and exit */ 2187 vput(dvp); 2188 vput(vp); 2189 2190 return error; 2191 } 2192 2193 /* --------------------------------------------------------------------- */ 2194 2195 int 2196 udf_fsync(void *v) 2197 { 2198 struct vop_fsync_args /* { 2199 struct vnode *a_vp; 2200 kauth_cred_t a_cred; 2201 int a_flags; 2202 off_t offlo; 2203 off_t offhi; 2204 struct proc *a_p; 2205 } */ *ap = v; 2206 struct vnode *vp = ap->a_vp; 2207 struct udf_node *udf_node = VTOI(vp); 2208 int error, flags, wait; 2209 2210 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2211 udf_node, 2212 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2213 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2214 2215 /* flush data and wait for it when requested */ 2216 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2217 error = vflushbuf(vp, wait); 2218 if (error) 2219 return error; 2220 2221 if (udf_node == NULL) { 2222 printf("udf_fsync() called on NULL udf_node!\n"); 2223 return 0; 2224 } 2225 if (vp->v_tag != VT_UDF) { 2226 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2227 return 0; 2228 } 2229 2230 /* set our times */ 2231 udf_itimes(udf_node, NULL, NULL, NULL); 2232 2233 /* if called when mounted readonly, never write back */ 2234 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2235 return 0; 2236 2237 /* if only data is requested, return */ 2238 if (ap->a_flags & FSYNC_DATAONLY) 2239 return 0; 2240 2241 /* check if the node is dirty 'enough'*/ 2242 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2243 if (flags == 0) 2244 return 0; 2245 2246 /* if we don't have to wait, check for IO pending */ 2247 if (!wait) { 2248 if (vp->v_numoutput > 0) { 2249 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2250 return 0; 2251 } 2252 if (udf_node->outstanding_bufs > 0) { 2253 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2254 return 0; 2255 } 2256 if (udf_node->outstanding_nodedscr > 0) { 2257 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2258 return 0; 2259 } 2260 } 2261 2262 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2263 if (wait) { 2264 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2265 mutex_enter(&vp->v_interlock); 2266 while (vp->v_numoutput) { 2267 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2268 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2269 } 2270 mutex_exit(&vp->v_interlock); 2271 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2272 } 2273 2274 /* write out node and wait for it if requested */ 2275 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2276 error = udf_writeout_node(udf_node, wait); 2277 if (error) 2278 return error; 2279 2280 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2281 2282 return 0; 2283 } 2284 2285 /* --------------------------------------------------------------------- */ 2286 2287 int 2288 udf_advlock(void *v) 2289 { 2290 struct vop_advlock_args /* { 2291 struct vnode *a_vp; 2292 void *a_id; 2293 int a_op; 2294 struct flock *a_fl; 2295 int a_flags; 2296 } */ *ap = v; 2297 struct vnode *vp = ap->a_vp; 2298 struct udf_node *udf_node = VTOI(vp); 2299 struct file_entry *fe; 2300 struct extfile_entry *efe; 2301 uint64_t file_size; 2302 2303 DPRINTF(LOCKING, ("udf_advlock called\n")); 2304 2305 /* get directory filesize */ 2306 if (udf_node->fe) { 2307 fe = udf_node->fe; 2308 file_size = udf_rw64(fe->inf_len); 2309 } else { 2310 assert(udf_node->efe); 2311 efe = udf_node->efe; 2312 file_size = udf_rw64(efe->inf_len); 2313 } 2314 2315 return lf_advlock(ap, &udf_node->lockf, file_size); 2316 } 2317 2318 /* --------------------------------------------------------------------- */ 2319 2320 /* Global vfs vnode data structures for udfs */ 2321 int (**udf_vnodeop_p)(void *); 2322 2323 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2324 { &vop_default_desc, vn_default_error }, 2325 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2326 { &vop_create_desc, udf_create }, /* create */ 2327 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2328 { &vop_open_desc, udf_open }, /* open */ 2329 { &vop_close_desc, udf_close }, /* close */ 2330 { &vop_access_desc, udf_access }, /* access */ 2331 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2332 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2333 { &vop_read_desc, udf_read }, /* read */ 2334 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2335 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2336 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2337 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2338 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2339 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2340 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2341 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2342 { &vop_seek_desc, genfs_seek }, /* seek */ 2343 { &vop_remove_desc, udf_remove }, /* remove */ 2344 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2345 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2346 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2347 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2348 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2349 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2350 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2351 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2352 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2353 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2354 { &vop_lock_desc, genfs_lock }, /* lock */ 2355 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2356 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2357 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2358 /* { &vop_print_desc, udf_print }, */ /* print */ 2359 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2360 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2361 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2362 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2363 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2364 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2365 { NULL, NULL } 2366 }; 2367 2368 2369 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2370 &udf_vnodeop_p, udf_vnodeop_entries 2371 }; 2372 2373