1 /* $NetBSD: udf_vnops.c,v 1.59 2010/06/24 13:03:11 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 1.59 2010/06/24 13:03:11 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 /* keep the component name */ 766 cnp->cn_flags |= SAVENAME; 767 error = EJUSTRETURN; 768 } 769 } 770 /* done */ 771 } else { 772 /* try to create/reuse the node */ 773 error = udf_get_node(ump, &icb_loc, &res_node); 774 if (!error) { 775 /* 776 * If we are not at the last path component 777 * and found a non-directory or non-link entry 778 * (which may itself be pointing to a 779 * directory), raise an error. 780 */ 781 vnodetp = res_node->vnode->v_type; 782 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 783 if (!islastcn) 784 error = ENOTDIR; 785 } 786 787 } 788 if (!error) { 789 *vpp = res_node->vnode; 790 } 791 } 792 } 793 794 out: 795 /* 796 * Store result in the cache if requested. If we are creating a file, 797 * the file might not be found and thus putting it into the namecache 798 * might be seen as negative caching. 799 */ 800 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 801 cache_enter(dvp, *vpp, cnp); 802 803 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 804 805 return error; 806 } 807 808 /* --------------------------------------------------------------------- */ 809 810 int 811 udf_getattr(void *v) 812 { 813 struct vop_getattr_args /* { 814 struct vnode *a_vp; 815 struct vattr *a_vap; 816 kauth_cred_t a_cred; 817 struct lwp *a_l; 818 } */ *ap = v; 819 struct vnode *vp = ap->a_vp; 820 struct udf_node *udf_node = VTOI(vp); 821 struct udf_mount *ump = udf_node->ump; 822 struct file_entry *fe = udf_node->fe; 823 struct extfile_entry *efe = udf_node->efe; 824 struct filetimes_extattr_entry *ft_extattr; 825 struct device_extattr_entry *devattr; 826 struct vattr *vap = ap->a_vap; 827 struct timestamp *atime, *mtime, *attrtime, *creatime; 828 uint64_t filesize, blkssize; 829 uint32_t nlink; 830 uint32_t offset, a_l; 831 uint8_t *filedata; 832 uid_t uid; 833 gid_t gid; 834 int error; 835 836 DPRINTF(CALL, ("udf_getattr called\n")); 837 838 /* update times before we returning values */ 839 udf_itimes(udf_node, NULL, NULL, NULL); 840 841 /* get descriptor information */ 842 if (fe) { 843 nlink = udf_rw16(fe->link_cnt); 844 uid = (uid_t)udf_rw32(fe->uid); 845 gid = (gid_t)udf_rw32(fe->gid); 846 filesize = udf_rw64(fe->inf_len); 847 blkssize = udf_rw64(fe->logblks_rec); 848 atime = &fe->atime; 849 mtime = &fe->mtime; 850 attrtime = &fe->attrtime; 851 filedata = fe->data; 852 853 /* initial guess */ 854 creatime = mtime; 855 856 /* check our extended attribute if present */ 857 error = udf_extattr_search_intern(udf_node, 858 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 859 if (!error) { 860 ft_extattr = (struct filetimes_extattr_entry *) 861 (filedata + offset); 862 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 863 creatime = &ft_extattr->times[0]; 864 } 865 } else { 866 assert(udf_node->efe); 867 nlink = udf_rw16(efe->link_cnt); 868 uid = (uid_t)udf_rw32(efe->uid); 869 gid = (gid_t)udf_rw32(efe->gid); 870 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 871 blkssize = udf_rw64(efe->logblks_rec); 872 atime = &efe->atime; 873 mtime = &efe->mtime; 874 attrtime = &efe->attrtime; 875 creatime = &efe->ctime; 876 filedata = efe->data; 877 } 878 879 /* do the uid/gid translation game */ 880 if (uid == (uid_t) -1) 881 uid = ump->mount_args.anon_uid; 882 if (gid == (gid_t) -1) 883 gid = ump->mount_args.anon_gid; 884 885 /* fill in struct vattr with values from the node */ 886 vattr_null(vap); 887 vap->va_type = vp->v_type; 888 vap->va_mode = udf_getaccessmode(udf_node); 889 vap->va_nlink = nlink; 890 vap->va_uid = uid; 891 vap->va_gid = gid; 892 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 893 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 894 vap->va_size = filesize; 895 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 896 897 /* 898 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 899 * 1 to the link count if its a directory we're requested attributes 900 * of. 901 */ 902 if (vap->va_type == VDIR) 903 vap->va_nlink++; 904 905 /* access times */ 906 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 907 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 908 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 909 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 910 911 vap->va_gen = 1; /* no multiple generations yes (!?) */ 912 vap->va_flags = 0; /* no flags */ 913 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 914 vap->va_filerev = 1; /* TODO file revision numbers? */ 915 vap->va_vaflags = 0; 916 /* TODO get vaflags from the extended attributes? */ 917 918 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 919 error = udf_extattr_search_intern(udf_node, 920 UDF_DEVICESPEC_ATTR_NO, "", 921 &offset, &a_l); 922 /* if error, deny access */ 923 if (error || (filedata == NULL)) { 924 vap->va_mode = 0; /* or v_type = VNON? */ 925 } else { 926 devattr = (struct device_extattr_entry *) 927 filedata + offset; 928 vap->va_rdev = makedev( 929 udf_rw32(devattr->major), 930 udf_rw32(devattr->minor) 931 ); 932 /* TODO we could check the implementator */ 933 } 934 } 935 936 return 0; 937 } 938 939 /* --------------------------------------------------------------------- */ 940 941 static int 942 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 943 kauth_cred_t cred) 944 { 945 struct udf_node *udf_node = VTOI(vp); 946 uid_t uid; 947 gid_t gid; 948 int error; 949 950 #ifdef notyet 951 /* TODO get vaflags from the extended attributes? */ 952 /* Immutable or append-only files cannot be modified, either. */ 953 if (udf_node->flags & (IMMUTABLE | APPEND)) 954 return EPERM; 955 #endif 956 957 if (vp->v_mount->mnt_flag & MNT_RDONLY) 958 return EROFS; 959 960 /* retrieve old values */ 961 udf_getownership(udf_node, &uid, &gid); 962 963 /* only one could be specified */ 964 if (new_uid == VNOVAL) 965 new_uid = uid; 966 if (new_gid == VNOVAL) 967 new_gid = gid; 968 969 /* check if we can fit it in an 32 bits */ 970 if ((uid_t) ((uint32_t) new_uid) != new_uid) 971 return EINVAL; 972 if ((gid_t) ((uint32_t) new_gid) != new_gid) 973 return EINVAL; 974 975 /* check permissions */ 976 error = genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid); 977 if (error) 978 return (error); 979 980 /* change the ownership */ 981 udf_setownership(udf_node, new_uid, new_gid); 982 983 /* mark node changed */ 984 udf_node->i_flags |= IN_CHANGE; 985 986 return 0; 987 } 988 989 990 static int 991 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 992 { 993 struct udf_node *udf_node = VTOI(vp); 994 uid_t uid; 995 gid_t gid; 996 int error; 997 998 #ifdef notyet 999 /* TODO get vaflags from the extended attributes? */ 1000 /* Immutable or append-only files cannot be modified, either. */ 1001 if (udf_node->flags & (IMMUTABLE | APPEND)) 1002 return EPERM; 1003 #endif 1004 1005 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1006 return EROFS; 1007 1008 /* retrieve uid/gid values */ 1009 udf_getownership(udf_node, &uid, &gid); 1010 1011 /* check permissions */ 1012 error = genfs_can_chmod(vp, cred, uid, gid, mode); 1013 if (error) 1014 return (error); 1015 1016 /* change mode */ 1017 udf_setaccessmode(udf_node, mode); 1018 1019 /* mark node changed */ 1020 udf_node->i_flags |= IN_CHANGE; 1021 1022 return 0; 1023 } 1024 1025 1026 /* exported */ 1027 int 1028 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1029 { 1030 struct udf_node *udf_node = VTOI(vp); 1031 int error, extended; 1032 1033 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1034 return EROFS; 1035 1036 /* Decide whether this is a valid operation based on the file type. */ 1037 switch (vp->v_type) { 1038 case VDIR: 1039 return EISDIR; 1040 case VREG: 1041 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1042 return EROFS; 1043 break; 1044 case VBLK: 1045 /* FALLTHROUGH */ 1046 case VCHR: 1047 /* FALLTHROUGH */ 1048 case VFIFO: 1049 /* Allow modifications of special files even if in the file 1050 * system is mounted read-only (we are not modifying the 1051 * files themselves, but the objects they represent). */ 1052 return 0; 1053 default: 1054 /* Anything else is unsupported. */ 1055 return EOPNOTSUPP; 1056 } 1057 1058 #if notyet 1059 /* TODO get vaflags from the extended attributes? */ 1060 /* Immutable or append-only files cannot be modified, either. */ 1061 if (node->flags & (IMMUTABLE | APPEND)) 1062 return EPERM; 1063 #endif 1064 1065 /* resize file to the requested size */ 1066 error = udf_resize_node(udf_node, newsize, &extended); 1067 1068 if (error == 0) { 1069 /* mark change */ 1070 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1071 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1072 udf_update(vp, NULL, NULL, NULL, 0); 1073 } 1074 1075 return error; 1076 } 1077 1078 1079 static int 1080 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1081 { 1082 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1083 return EROFS; 1084 1085 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1086 1087 return 0; 1088 } 1089 1090 1091 static int 1092 udf_chtimes(struct vnode *vp, 1093 struct timespec *atime, struct timespec *mtime, 1094 struct timespec *birthtime, int setattrflags, 1095 kauth_cred_t cred) 1096 { 1097 struct udf_node *udf_node = VTOI(vp); 1098 uid_t uid; 1099 gid_t gid; 1100 int error; 1101 1102 #ifdef notyet 1103 /* TODO get vaflags from the extended attributes? */ 1104 /* Immutable or append-only files cannot be modified, either. */ 1105 if (udf_node->flags & (IMMUTABLE | APPEND)) 1106 return EPERM; 1107 #endif 1108 1109 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1110 return EROFS; 1111 1112 /* retrieve uid/gid values */ 1113 udf_getownership(udf_node, &uid, &gid); 1114 1115 /* check permissions */ 1116 error = genfs_can_chtimes(vp, setattrflags, uid, cred); 1117 if (error) 1118 return (error); 1119 1120 /* update node flags depending on what times are passed */ 1121 if (atime->tv_sec != VNOVAL) 1122 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1123 udf_node->i_flags |= IN_ACCESS; 1124 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1125 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1126 1127 return udf_update(vp, atime, mtime, birthtime, 0); 1128 } 1129 1130 1131 int 1132 udf_setattr(void *v) 1133 { 1134 struct vop_setattr_args /* { 1135 struct vnode *a_vp; 1136 struct vattr *a_vap; 1137 kauth_cred_t a_cred; 1138 struct lwp *a_l; 1139 } */ *ap = v; 1140 struct vnode *vp = ap->a_vp; 1141 /* struct udf_node *udf_node = VTOI(vp); */ 1142 /* struct udf_mount *ump = udf_node->ump; */ 1143 kauth_cred_t cred = ap->a_cred; 1144 struct vattr *vap = ap->a_vap; 1145 int error; 1146 1147 DPRINTF(CALL, ("udf_setattr called\n")); 1148 1149 /* Abort if any unsettable attribute is given. */ 1150 error = 0; 1151 if (vap->va_type != VNON || 1152 vap->va_nlink != VNOVAL || 1153 vap->va_fsid != VNOVAL || 1154 vap->va_fileid != VNOVAL || 1155 vap->va_blocksize != VNOVAL || 1156 #ifdef notyet 1157 /* checks are debated */ 1158 vap->va_ctime.tv_sec != VNOVAL || 1159 vap->va_ctime.tv_nsec != VNOVAL || 1160 vap->va_birthtime.tv_sec != VNOVAL || 1161 vap->va_birthtime.tv_nsec != VNOVAL || 1162 #endif 1163 vap->va_gen != VNOVAL || 1164 vap->va_rdev != VNOVAL || 1165 vap->va_bytes != VNOVAL) 1166 error = EINVAL; 1167 1168 DPRINTF(ATTR, ("setattr changing:\n")); 1169 if (error == 0 && (vap->va_flags != VNOVAL)) { 1170 DPRINTF(ATTR, ("\tchflags\n")); 1171 error = udf_chflags(vp, vap->va_flags, cred); 1172 } 1173 1174 if (error == 0 && (vap->va_size != VNOVAL)) { 1175 DPRINTF(ATTR, ("\tchsize\n")); 1176 error = udf_chsize(vp, vap->va_size, cred); 1177 } 1178 1179 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1180 DPRINTF(ATTR, ("\tchown\n")); 1181 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1182 } 1183 1184 if (error == 0 && (vap->va_mode != VNOVAL)) { 1185 DPRINTF(ATTR, ("\tchmod\n")); 1186 error = udf_chmod(vp, vap->va_mode, cred); 1187 } 1188 1189 if (error == 0 && 1190 ((vap->va_atime.tv_sec != VNOVAL && 1191 vap->va_atime.tv_nsec != VNOVAL) || 1192 (vap->va_mtime.tv_sec != VNOVAL && 1193 vap->va_mtime.tv_nsec != VNOVAL)) 1194 ) { 1195 DPRINTF(ATTR, ("\tchtimes\n")); 1196 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1197 &vap->va_birthtime, vap->va_vaflags, cred); 1198 } 1199 VN_KNOTE(vp, NOTE_ATTRIB); 1200 1201 return error; 1202 } 1203 1204 /* --------------------------------------------------------------------- */ 1205 1206 /* 1207 * Return POSIX pathconf information for UDF file systems. 1208 */ 1209 int 1210 udf_pathconf(void *v) 1211 { 1212 struct vop_pathconf_args /* { 1213 struct vnode *a_vp; 1214 int a_name; 1215 register_t *a_retval; 1216 } */ *ap = v; 1217 uint32_t bits; 1218 1219 DPRINTF(CALL, ("udf_pathconf called\n")); 1220 1221 switch (ap->a_name) { 1222 case _PC_LINK_MAX: 1223 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1224 return 0; 1225 case _PC_NAME_MAX: 1226 *ap->a_retval = NAME_MAX; 1227 return 0; 1228 case _PC_PATH_MAX: 1229 *ap->a_retval = PATH_MAX; 1230 return 0; 1231 case _PC_PIPE_BUF: 1232 *ap->a_retval = PIPE_BUF; 1233 return 0; 1234 case _PC_CHOWN_RESTRICTED: 1235 *ap->a_retval = 1; 1236 return 0; 1237 case _PC_NO_TRUNC: 1238 *ap->a_retval = 1; 1239 return 0; 1240 case _PC_SYNC_IO: 1241 *ap->a_retval = 0; /* synchronised is off for performance */ 1242 return 0; 1243 case _PC_FILESIZEBITS: 1244 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1245 bits = 64; /* XXX ought to deliver 65 */ 1246 #if 0 1247 if (udf_node) 1248 bits = 64 * vp->v_mount->mnt_dev_bshift; 1249 #endif 1250 *ap->a_retval = bits; 1251 return 0; 1252 } 1253 1254 return EINVAL; 1255 } 1256 1257 1258 /* --------------------------------------------------------------------- */ 1259 1260 int 1261 udf_open(void *v) 1262 { 1263 struct vop_open_args /* { 1264 struct vnode *a_vp; 1265 int a_mode; 1266 kauth_cred_t a_cred; 1267 struct proc *a_p; 1268 } */ *ap = v; 1269 int flags; 1270 1271 DPRINTF(CALL, ("udf_open called\n")); 1272 1273 /* 1274 * Files marked append-only must be opened for appending. 1275 * TODO: get chflags(2) flags from extened attribute. 1276 */ 1277 flags = 0; 1278 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1279 return (EPERM); 1280 1281 return 0; 1282 } 1283 1284 1285 /* --------------------------------------------------------------------- */ 1286 1287 int 1288 udf_close(void *v) 1289 { 1290 struct vop_close_args /* { 1291 struct vnode *a_vp; 1292 int a_fflag; 1293 kauth_cred_t a_cred; 1294 struct proc *a_p; 1295 } */ *ap = v; 1296 struct vnode *vp = ap->a_vp; 1297 struct udf_node *udf_node = VTOI(vp); 1298 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1299 int error; 1300 1301 DPRINTF(CALL, ("udf_close called\n")); 1302 udf_node = udf_node; /* shut up gcc */ 1303 1304 if (!async && (vp->v_type != VDIR)) { 1305 mutex_enter(&vp->v_interlock); 1306 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1307 if (error) 1308 return error; 1309 } 1310 1311 mutex_enter(&vp->v_interlock); 1312 if (vp->v_usecount > 1) 1313 udf_itimes(udf_node, NULL, NULL, NULL); 1314 mutex_exit(&vp->v_interlock); 1315 1316 return 0; 1317 } 1318 1319 1320 /* --------------------------------------------------------------------- */ 1321 1322 static int 1323 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1324 { 1325 int flags; 1326 1327 /* check if we are allowed to write */ 1328 switch (vap->va_type) { 1329 case VDIR: 1330 case VLNK: 1331 case VREG: 1332 /* 1333 * normal nodes: check if we're on a read-only mounted 1334 * filingsystem and bomb out if we're trying to write. 1335 */ 1336 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1337 return EROFS; 1338 break; 1339 case VBLK: 1340 case VCHR: 1341 case VSOCK: 1342 case VFIFO: 1343 /* 1344 * special nodes: even on read-only mounted filingsystems 1345 * these are allowed to be written to if permissions allow. 1346 */ 1347 break; 1348 default: 1349 /* no idea what this is */ 1350 return EINVAL; 1351 } 1352 1353 /* noone may write immutable files */ 1354 /* TODO: get chflags(2) flags from extened attribute. */ 1355 flags = 0; 1356 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1357 return EPERM; 1358 1359 return 0; 1360 } 1361 1362 static int 1363 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1364 kauth_cred_t cred) 1365 { 1366 1367 /* ask the generic genfs_can_access to advice on security */ 1368 return genfs_can_access(vp->v_type, 1369 vap->va_mode, vap->va_uid, vap->va_gid, 1370 mode, cred); 1371 } 1372 1373 int 1374 udf_access(void *v) 1375 { 1376 struct vop_access_args /* { 1377 struct vnode *a_vp; 1378 int a_mode; 1379 kauth_cred_t a_cred; 1380 struct proc *a_p; 1381 } */ *ap = v; 1382 struct vnode *vp = ap->a_vp; 1383 mode_t mode = ap->a_mode; 1384 kauth_cred_t cred = ap->a_cred; 1385 /* struct udf_node *udf_node = VTOI(vp); */ 1386 struct vattr vap; 1387 int error; 1388 1389 DPRINTF(CALL, ("udf_access called\n")); 1390 1391 error = VOP_GETATTR(vp, &vap, NULL); 1392 if (error) 1393 return error; 1394 1395 error = udf_check_possible(vp, &vap, mode); 1396 if (error) 1397 return error; 1398 1399 error = udf_check_permitted(vp, &vap, mode, cred); 1400 1401 return error; 1402 } 1403 1404 /* --------------------------------------------------------------------- */ 1405 1406 int 1407 udf_create(void *v) 1408 { 1409 struct vop_create_args /* { 1410 struct vnode *a_dvp; 1411 struct vnode **a_vpp; 1412 struct componentname *a_cnp; 1413 struct vattr *a_vap; 1414 } */ *ap = v; 1415 struct vnode *dvp = ap->a_dvp; 1416 struct vnode **vpp = ap->a_vpp; 1417 struct vattr *vap = ap->a_vap; 1418 struct componentname *cnp = ap->a_cnp; 1419 int error; 1420 1421 DPRINTF(CALL, ("udf_create called\n")); 1422 error = udf_create_node(dvp, vpp, vap, cnp); 1423 1424 if (error || !(cnp->cn_flags & SAVESTART)) 1425 PNBUF_PUT(cnp->cn_pnbuf); 1426 vput(dvp); 1427 return error; 1428 } 1429 1430 /* --------------------------------------------------------------------- */ 1431 1432 int 1433 udf_mknod(void *v) 1434 { 1435 struct vop_mknod_args /* { 1436 struct vnode *a_dvp; 1437 struct vnode **a_vpp; 1438 struct componentname *a_cnp; 1439 struct vattr *a_vap; 1440 } */ *ap = v; 1441 struct vnode *dvp = ap->a_dvp; 1442 struct vnode **vpp = ap->a_vpp; 1443 struct vattr *vap = ap->a_vap; 1444 struct componentname *cnp = ap->a_cnp; 1445 int error; 1446 1447 DPRINTF(CALL, ("udf_mknod called\n")); 1448 error = udf_create_node(dvp, vpp, vap, cnp); 1449 1450 if (error || !(cnp->cn_flags & SAVESTART)) 1451 PNBUF_PUT(cnp->cn_pnbuf); 1452 vput(dvp); 1453 return error; 1454 } 1455 1456 /* --------------------------------------------------------------------- */ 1457 1458 int 1459 udf_mkdir(void *v) 1460 { 1461 struct vop_mkdir_args /* { 1462 struct vnode *a_dvp; 1463 struct vnode **a_vpp; 1464 struct componentname *a_cnp; 1465 struct vattr *a_vap; 1466 } */ *ap = v; 1467 struct vnode *dvp = ap->a_dvp; 1468 struct vnode **vpp = ap->a_vpp; 1469 struct vattr *vap = ap->a_vap; 1470 struct componentname *cnp = ap->a_cnp; 1471 int error; 1472 1473 DPRINTF(CALL, ("udf_mkdir called\n")); 1474 error = udf_create_node(dvp, vpp, vap, cnp); 1475 1476 if (error || !(cnp->cn_flags & SAVESTART)) 1477 PNBUF_PUT(cnp->cn_pnbuf); 1478 vput(dvp); 1479 return error; 1480 } 1481 1482 /* --------------------------------------------------------------------- */ 1483 1484 static int 1485 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1486 { 1487 struct udf_node *udf_node, *dir_node; 1488 struct vattr vap; 1489 int error; 1490 1491 DPRINTF(CALL, ("udf_link called\n")); 1492 error = 0; 1493 1494 /* some quick checks */ 1495 if (vp->v_type == VDIR) 1496 return EPERM; /* can't link a directory */ 1497 if (dvp->v_mount != vp->v_mount) 1498 return EXDEV; /* can't link across devices */ 1499 if (dvp == vp) 1500 return EPERM; /* can't be the same */ 1501 1502 /* lock node */ 1503 error = vn_lock(vp, LK_EXCLUSIVE); 1504 if (error) 1505 return error; 1506 1507 /* get attributes */ 1508 dir_node = VTOI(dvp); 1509 udf_node = VTOI(vp); 1510 1511 error = VOP_GETATTR(vp, &vap, FSCRED); 1512 if (error) { 1513 VOP_UNLOCK(vp); 1514 return error; 1515 } 1516 1517 /* check link count overflow */ 1518 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1519 VOP_UNLOCK(vp); 1520 return EMLINK; 1521 } 1522 1523 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1524 if (error) 1525 VOP_UNLOCK(vp); 1526 return error; 1527 } 1528 1529 int 1530 udf_link(void *v) 1531 { 1532 struct vop_link_args /* { 1533 struct vnode *a_dvp; 1534 struct vnode *a_vp; 1535 struct componentname *a_cnp; 1536 } */ *ap = v; 1537 struct vnode *dvp = ap->a_dvp; 1538 struct vnode *vp = ap->a_vp; 1539 struct componentname *cnp = ap->a_cnp; 1540 int error; 1541 1542 error = udf_do_link(dvp, vp, cnp); 1543 if (error) 1544 VOP_ABORTOP(dvp, cnp); 1545 1546 VN_KNOTE(vp, NOTE_LINK); 1547 VN_KNOTE(dvp, NOTE_WRITE); 1548 vput(dvp); 1549 1550 return error; 1551 } 1552 1553 /* --------------------------------------------------------------------- */ 1554 1555 static int 1556 udf_do_symlink(struct udf_node *udf_node, char *target) 1557 { 1558 struct pathcomp pathcomp; 1559 uint8_t *pathbuf, *pathpos, *compnamepos; 1560 char *mntonname; 1561 int pathlen, len, compnamelen, mntonnamelen; 1562 int error; 1563 1564 /* process `target' to an UDF structure */ 1565 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1566 pathpos = pathbuf; 1567 pathlen = 0; 1568 1569 if (*target == '/') { 1570 /* symlink starts from the root */ 1571 len = UDF_PATH_COMP_SIZE; 1572 memset(&pathcomp, 0, len); 1573 pathcomp.type = UDF_PATH_COMP_ROOT; 1574 1575 /* check if its mount-point relative! */ 1576 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1577 mntonnamelen = strlen(mntonname); 1578 if (strlen(target) >= mntonnamelen) { 1579 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1580 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1581 target += mntonnamelen; 1582 } 1583 } else { 1584 target++; 1585 } 1586 1587 memcpy(pathpos, &pathcomp, len); 1588 pathpos += len; 1589 pathlen += len; 1590 } 1591 1592 error = 0; 1593 while (*target) { 1594 /* ignore multiple '/' */ 1595 while (*target == '/') { 1596 target++; 1597 } 1598 if (!*target) 1599 break; 1600 1601 /* extract component name */ 1602 compnamelen = 0; 1603 compnamepos = target; 1604 while ((*target) && (*target != '/')) { 1605 target++; 1606 compnamelen++; 1607 } 1608 1609 /* just trunc if too long ?? (security issue) */ 1610 if (compnamelen >= 127) { 1611 error = ENAMETOOLONG; 1612 break; 1613 } 1614 1615 /* convert unix name to UDF name */ 1616 len = sizeof(struct pathcomp); 1617 memset(&pathcomp, 0, len); 1618 pathcomp.type = UDF_PATH_COMP_NAME; 1619 len = UDF_PATH_COMP_SIZE; 1620 1621 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1622 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1623 if ((compnamelen == 1) && (*compnamepos == '.')) 1624 pathcomp.type = UDF_PATH_COMP_CURDIR; 1625 1626 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1627 unix_to_udf_name( 1628 (char *) &pathcomp.ident, &pathcomp.l_ci, 1629 compnamepos, compnamelen, 1630 &udf_node->ump->logical_vol->desc_charset); 1631 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1632 } 1633 1634 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1635 error = ENAMETOOLONG; 1636 break; 1637 } 1638 1639 memcpy(pathpos, &pathcomp, len); 1640 pathpos += len; 1641 pathlen += len; 1642 } 1643 1644 if (error) { 1645 /* aparently too big */ 1646 free(pathbuf, M_UDFTEMP); 1647 return error; 1648 } 1649 1650 error = udf_grow_node(udf_node, pathlen); 1651 if (error) { 1652 /* failed to pregrow node */ 1653 free(pathbuf, M_UDFTEMP); 1654 return error; 1655 } 1656 1657 /* write out structure on the new file */ 1658 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1659 pathbuf, pathlen, 0, 1660 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1661 FSCRED, NULL, NULL); 1662 1663 /* return status of symlink contents writeout */ 1664 free(pathbuf, M_UDFTEMP); 1665 return error; 1666 } 1667 1668 1669 int 1670 udf_symlink(void *v) 1671 { 1672 struct vop_symlink_args /* { 1673 struct vnode *a_dvp; 1674 struct vnode **a_vpp; 1675 struct componentname *a_cnp; 1676 struct vattr *a_vap; 1677 char *a_target; 1678 } */ *ap = v; 1679 struct vnode *dvp = ap->a_dvp; 1680 struct vnode **vpp = ap->a_vpp; 1681 struct vattr *vap = ap->a_vap; 1682 struct componentname *cnp = ap->a_cnp; 1683 struct udf_node *dir_node; 1684 struct udf_node *udf_node; 1685 int error; 1686 1687 DPRINTF(CALL, ("udf_symlink called\n")); 1688 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1689 error = udf_create_node(dvp, vpp, vap, cnp); 1690 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1691 if (!error) { 1692 dir_node = VTOI(dvp); 1693 udf_node = VTOI(*vpp); 1694 KASSERT(udf_node); 1695 error = udf_do_symlink(udf_node, ap->a_target); 1696 if (error) { 1697 /* remove node */ 1698 udf_shrink_node(udf_node, 0); 1699 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1700 } 1701 } 1702 if (error || !(cnp->cn_flags & SAVESTART)) 1703 PNBUF_PUT(cnp->cn_pnbuf); 1704 vput(dvp); 1705 return error; 1706 } 1707 1708 /* --------------------------------------------------------------------- */ 1709 1710 int 1711 udf_readlink(void *v) 1712 { 1713 struct vop_readlink_args /* { 1714 struct vnode *a_vp; 1715 struct uio *a_uio; 1716 kauth_cred_t a_cred; 1717 } */ *ap = v; 1718 struct vnode *vp = ap->a_vp; 1719 struct uio *uio = ap->a_uio; 1720 kauth_cred_t cred = ap->a_cred; 1721 struct udf_node *udf_node; 1722 struct pathcomp pathcomp; 1723 struct vattr vattr; 1724 uint8_t *pathbuf, *targetbuf, *tmpname; 1725 uint8_t *pathpos, *targetpos; 1726 char *mntonname; 1727 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1728 int first, error; 1729 1730 DPRINTF(CALL, ("udf_readlink called\n")); 1731 1732 udf_node = VTOI(vp); 1733 error = VOP_GETATTR(vp, &vattr, cred); 1734 if (error) 1735 return error; 1736 1737 /* claim temporary buffers for translation */ 1738 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1739 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1740 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1741 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1742 memset(targetbuf, 0, PATH_MAX); 1743 1744 /* read contents of file in our temporary buffer */ 1745 error = vn_rdwr(UIO_READ, udf_node->vnode, 1746 pathbuf, vattr.va_size, 0, 1747 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1748 FSCRED, NULL, NULL); 1749 if (error) { 1750 /* failed to read in symlink contents */ 1751 free(pathbuf, M_UDFTEMP); 1752 free(targetbuf, M_UDFTEMP); 1753 free(tmpname, M_UDFTEMP); 1754 return error; 1755 } 1756 1757 /* convert to a unix path */ 1758 pathpos = pathbuf; 1759 pathlen = 0; 1760 targetpos = targetbuf; 1761 targetlen = PATH_MAX; 1762 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1763 mntonnamelen = strlen(mntonname); 1764 1765 error = 0; 1766 first = 1; 1767 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1768 len = UDF_PATH_COMP_SIZE; 1769 memcpy(&pathcomp, pathpos, len); 1770 l_ci = pathcomp.l_ci; 1771 switch (pathcomp.type) { 1772 case UDF_PATH_COMP_ROOT : 1773 /* XXX should check for l_ci; bugcompatible now */ 1774 if ((targetlen < 1) || !first) { 1775 error = EINVAL; 1776 break; 1777 } 1778 *targetpos++ = '/'; targetlen--; 1779 break; 1780 case UDF_PATH_COMP_MOUNTROOT : 1781 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1782 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1783 error = EINVAL; 1784 break; 1785 } 1786 memcpy(targetpos, mntonname, mntonnamelen); 1787 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1788 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1789 /* more follows, so must be directory */ 1790 *targetpos++ = '/'; targetlen--; 1791 } 1792 break; 1793 case UDF_PATH_COMP_PARENTDIR : 1794 /* XXX should check for l_ci; bugcompatible now */ 1795 if (targetlen < 3) { 1796 error = EINVAL; 1797 break; 1798 } 1799 *targetpos++ = '.'; targetlen--; 1800 *targetpos++ = '.'; targetlen--; 1801 *targetpos++ = '/'; targetlen--; 1802 break; 1803 case UDF_PATH_COMP_CURDIR : 1804 /* XXX should check for l_ci; bugcompatible now */ 1805 if (targetlen < 2) { 1806 error = EINVAL; 1807 break; 1808 } 1809 *targetpos++ = '.'; targetlen--; 1810 *targetpos++ = '/'; targetlen--; 1811 break; 1812 case UDF_PATH_COMP_NAME : 1813 if (l_ci == 0) { 1814 error = EINVAL; 1815 break; 1816 } 1817 memset(tmpname, 0, PATH_MAX); 1818 memcpy(&pathcomp, pathpos, len + l_ci); 1819 udf_to_unix_name(tmpname, MAXPATHLEN, 1820 pathcomp.ident, l_ci, 1821 &udf_node->ump->logical_vol->desc_charset); 1822 namelen = strlen(tmpname); 1823 if (targetlen < namelen + 1) { 1824 error = EINVAL; 1825 break; 1826 } 1827 memcpy(targetpos, tmpname, namelen); 1828 targetpos += namelen; targetlen -= namelen; 1829 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1830 /* more follows, so must be directory */ 1831 *targetpos++ = '/'; targetlen--; 1832 } 1833 break; 1834 default : 1835 error = EINVAL; 1836 break; 1837 } 1838 first = 0; 1839 if (error) 1840 break; 1841 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1842 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1843 1844 } 1845 /* all processed? */ 1846 if (vattr.va_size - pathlen > 0) 1847 error = EINVAL; 1848 1849 /* uiomove() to destination */ 1850 if (!error) 1851 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1852 1853 free(pathbuf, M_UDFTEMP); 1854 free(targetbuf, M_UDFTEMP); 1855 free(tmpname, M_UDFTEMP); 1856 1857 return error; 1858 } 1859 1860 /* --------------------------------------------------------------------- */ 1861 1862 /* 1863 * Check if source directory is in the path of the target directory. Target 1864 * is supplied locked, source is unlocked. The target is always vput before 1865 * returning. Modeled after UFS. 1866 * 1867 * If source is on the path from target to the root, return error. 1868 */ 1869 1870 static int 1871 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1872 { 1873 struct udf_mount *ump = target->ump; 1874 struct udf_node *res_node; 1875 struct long_ad icb_loc, *root_icb; 1876 const char *name; 1877 int namelen; 1878 int error, found; 1879 1880 name = ".."; 1881 namelen = 2; 1882 error = 0; 1883 res_node = target; 1884 1885 root_icb = &ump->fileset_desc->rootdir_icb; 1886 1887 /* if nodes are equal, it is no use looking */ 1888 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1889 error = EEXIST; 1890 goto out; 1891 } 1892 1893 /* nothing can exist before the root */ 1894 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1895 error = 0; 1896 goto out; 1897 } 1898 1899 for (;;) { 1900 DPRINTF(NODE, ("udf_on_rootpath : " 1901 "source vp %p, looking at vp %p\n", 1902 source->vnode, res_node->vnode)); 1903 1904 /* sanity check */ 1905 if (res_node->vnode->v_type != VDIR) { 1906 error = ENOTDIR; 1907 goto out; 1908 } 1909 1910 /* go down one level */ 1911 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1912 &icb_loc, &found); 1913 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1914 "found %d\n", error, found)); 1915 1916 if (!found) 1917 error = ENOENT; 1918 if (error) 1919 goto out; 1920 1921 /* did we encounter source node? */ 1922 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1923 error = EINVAL; 1924 goto out; 1925 } 1926 1927 /* did we encounter the root node? */ 1928 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1929 error = 0; 1930 goto out; 1931 } 1932 1933 /* push our intermediate node, we're done with it */ 1934 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1935 vput(res_node->vnode); 1936 1937 DPRINTF(NODE, ("\tgetting the .. node\n")); 1938 error = udf_get_node(ump, &icb_loc, &res_node); 1939 1940 if (error) { /* argh, bail out */ 1941 KASSERT(res_node == NULL); 1942 // res_node = NULL; 1943 goto out; 1944 } 1945 } 1946 out: 1947 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1948 1949 /* put our last node */ 1950 if (res_node) 1951 vput(res_node->vnode); 1952 1953 return error; 1954 } 1955 1956 /* note: i tried to follow the logics of the tmpfs rename code */ 1957 int 1958 udf_rename(void *v) 1959 { 1960 struct vop_rename_args /* { 1961 struct vnode *a_fdvp; 1962 struct vnode *a_fvp; 1963 struct componentname *a_fcnp; 1964 struct vnode *a_tdvp; 1965 struct vnode *a_tvp; 1966 struct componentname *a_tcnp; 1967 } */ *ap = v; 1968 struct vnode *tvp = ap->a_tvp; 1969 struct vnode *tdvp = ap->a_tdvp; 1970 struct vnode *fvp = ap->a_fvp; 1971 struct vnode *fdvp = ap->a_fdvp; 1972 struct componentname *tcnp = ap->a_tcnp; 1973 struct componentname *fcnp = ap->a_fcnp; 1974 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1975 struct vattr fvap, tvap; 1976 int error; 1977 1978 DPRINTF(CALL, ("udf_rename called\n")); 1979 1980 /* disallow cross-device renames */ 1981 if (fvp->v_mount != tdvp->v_mount || 1982 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1983 error = EXDEV; 1984 goto out_unlocked; 1985 } 1986 1987 fnode = VTOI(fvp); 1988 fdnode = VTOI(fdvp); 1989 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1990 tdnode = VTOI(tdvp); 1991 1992 /* lock our source dir */ 1993 if (fdnode != tdnode) { 1994 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1995 if (error != 0) 1996 goto out_unlocked; 1997 } 1998 1999 /* get info about the node to be moved */ 2000 error = VOP_GETATTR(fvp, &fvap, FSCRED); 2001 KASSERT(error == 0); 2002 2003 /* check when to delete the old already existing entry */ 2004 if (tvp) { 2005 /* get info about the node to be moved to */ 2006 error = VOP_GETATTR(fvp, &tvap, FSCRED); 2007 KASSERT(error == 0); 2008 2009 /* if both dirs, make sure the destination is empty */ 2010 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 2011 if (tvap.va_nlink > 2) { 2012 error = ENOTEMPTY; 2013 goto out; 2014 } 2015 } 2016 /* if moving dir, make sure destination is dir too */ 2017 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2018 error = ENOTDIR; 2019 goto out; 2020 } 2021 /* if we're moving a non-directory, make sure dest is no dir */ 2022 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2023 error = EISDIR; 2024 goto out; 2025 } 2026 } 2027 2028 /* check if moving a directory to a new parent is allowed */ 2029 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2030 /* release tvp since we might encounter it and lock up */ 2031 if (tvp) 2032 vput(tvp); 2033 2034 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2035 vref(tdvp); 2036 2037 /* search if fnode is a component of tdnode's path to root */ 2038 error = udf_on_rootpath(fnode, tdnode); 2039 2040 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2041 2042 if (error) { 2043 /* compensate for our vref earlier */ 2044 vrele(tdvp); 2045 goto out; 2046 } 2047 2048 /* relock tdvp; its still here due to the vref earlier */ 2049 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2050 2051 /* 2052 * re-lookup tvp since the parent has been unlocked, so could 2053 * have changed/removed in the meantime. 2054 */ 2055 tcnp->cn_flags &= ~SAVESTART; 2056 error = relookup(tdvp, &tvp, tcnp); 2057 if (error) { 2058 vput(tdvp); 2059 goto out; 2060 } 2061 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2062 } 2063 2064 /* remove existing entry if present */ 2065 if (tvp) 2066 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2067 2068 /* create new directory entry for the node */ 2069 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2070 if (error) 2071 goto out; 2072 2073 /* unlink old directory entry for the node, if failing, unattach new */ 2074 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2075 if (error) 2076 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2077 if (error) 2078 goto out; 2079 2080 /* update tnode's '..' if moving directory to new parent */ 2081 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2082 /* update fnode's '..' entry */ 2083 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2084 if (error) { 2085 /* 'try' to recover from this situation */ 2086 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2087 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2088 } 2089 } 2090 2091 out: 2092 if (fdnode != tdnode) 2093 VOP_UNLOCK(fdvp); 2094 2095 out_unlocked: 2096 VOP_ABORTOP(tdvp, tcnp); 2097 if (tdvp == tvp) 2098 vrele(tdvp); 2099 else 2100 vput(tdvp); 2101 if (tvp) 2102 vput(tvp); 2103 VOP_ABORTOP(fdvp, fcnp); 2104 2105 /* release source nodes. */ 2106 vrele(fdvp); 2107 vrele(fvp); 2108 2109 return error; 2110 } 2111 2112 /* --------------------------------------------------------------------- */ 2113 2114 int 2115 udf_remove(void *v) 2116 { 2117 struct vop_remove_args /* { 2118 struct vnode *a_dvp; 2119 struct vnode *a_vp; 2120 struct componentname *a_cnp; 2121 } */ *ap = v; 2122 struct vnode *dvp = ap->a_dvp; 2123 struct vnode *vp = ap->a_vp; 2124 struct componentname *cnp = ap->a_cnp; 2125 struct udf_node *dir_node = VTOI(dvp); 2126 struct udf_node *udf_node = VTOI(vp); 2127 struct udf_mount *ump = dir_node->ump; 2128 int error; 2129 2130 DPRINTF(CALL, ("udf_remove called\n")); 2131 if (vp->v_type != VDIR) { 2132 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2133 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2134 } else { 2135 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2136 error = EPERM; 2137 } 2138 2139 if (error == 0) { 2140 VN_KNOTE(vp, NOTE_DELETE); 2141 VN_KNOTE(dvp, NOTE_WRITE); 2142 } 2143 2144 if (dvp == vp) 2145 vrele(vp); 2146 else 2147 vput(vp); 2148 vput(dvp); 2149 2150 return error; 2151 } 2152 2153 /* --------------------------------------------------------------------- */ 2154 2155 int 2156 udf_rmdir(void *v) 2157 { 2158 struct vop_rmdir_args /* { 2159 struct vnode *a_dvp; 2160 struct vnode *a_vp; 2161 struct componentname *a_cnp; 2162 } */ *ap = v; 2163 struct vnode *vp = ap->a_vp; 2164 struct vnode *dvp = ap->a_dvp; 2165 struct componentname *cnp = ap->a_cnp; 2166 struct udf_node *dir_node = VTOI(dvp); 2167 struct udf_node *udf_node = VTOI(vp); 2168 struct udf_mount *ump = dir_node->ump; 2169 int refcnt, error; 2170 2171 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2172 2173 /* don't allow '.' to be deleted */ 2174 if (dir_node == udf_node) { 2175 vrele(dvp); 2176 vput(vp); 2177 return EINVAL; 2178 } 2179 2180 /* check to see if the directory is empty */ 2181 error = 0; 2182 if (dir_node->fe) { 2183 refcnt = udf_rw16(udf_node->fe->link_cnt); 2184 } else { 2185 refcnt = udf_rw16(udf_node->efe->link_cnt); 2186 } 2187 if (refcnt > 1) { 2188 /* NOT empty */ 2189 vput(dvp); 2190 vput(vp); 2191 return ENOTEMPTY; 2192 } 2193 2194 /* detach the node from the directory */ 2195 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2196 if (error == 0) { 2197 cache_purge(vp); 2198 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2199 VN_KNOTE(vp, NOTE_DELETE); 2200 } 2201 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2202 2203 /* unput the nodes and exit */ 2204 vput(dvp); 2205 vput(vp); 2206 2207 return error; 2208 } 2209 2210 /* --------------------------------------------------------------------- */ 2211 2212 int 2213 udf_fsync(void *v) 2214 { 2215 struct vop_fsync_args /* { 2216 struct vnode *a_vp; 2217 kauth_cred_t a_cred; 2218 int a_flags; 2219 off_t offlo; 2220 off_t offhi; 2221 struct proc *a_p; 2222 } */ *ap = v; 2223 struct vnode *vp = ap->a_vp; 2224 struct udf_node *udf_node = VTOI(vp); 2225 int error, flags, wait; 2226 2227 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2228 udf_node, 2229 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2230 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2231 2232 /* flush data and wait for it when requested */ 2233 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2234 vflushbuf(vp, wait); 2235 2236 if (udf_node == NULL) { 2237 printf("udf_fsync() called on NULL udf_node!\n"); 2238 return 0; 2239 } 2240 if (vp->v_tag != VT_UDF) { 2241 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2242 return 0; 2243 } 2244 2245 /* set our times */ 2246 udf_itimes(udf_node, NULL, NULL, NULL); 2247 2248 /* if called when mounted readonly, never write back */ 2249 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2250 return 0; 2251 2252 /* if only data is requested, return */ 2253 if (ap->a_flags & FSYNC_DATAONLY) 2254 return 0; 2255 2256 /* check if the node is dirty 'enough'*/ 2257 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2258 if (flags == 0) 2259 return 0; 2260 2261 /* if we don't have to wait, check for IO pending */ 2262 if (!wait) { 2263 if (vp->v_numoutput > 0) { 2264 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2265 return 0; 2266 } 2267 if (udf_node->outstanding_bufs > 0) { 2268 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2269 return 0; 2270 } 2271 if (udf_node->outstanding_nodedscr > 0) { 2272 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2273 return 0; 2274 } 2275 } 2276 2277 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2278 if (wait) { 2279 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2280 mutex_enter(&vp->v_interlock); 2281 while (vp->v_numoutput) { 2282 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2283 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2284 } 2285 mutex_exit(&vp->v_interlock); 2286 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2287 } 2288 2289 /* write out node and wait for it if requested */ 2290 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2291 error = udf_writeout_node(udf_node, wait); 2292 if (error) 2293 return error; 2294 2295 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2296 2297 return 0; 2298 } 2299 2300 /* --------------------------------------------------------------------- */ 2301 2302 int 2303 udf_advlock(void *v) 2304 { 2305 struct vop_advlock_args /* { 2306 struct vnode *a_vp; 2307 void *a_id; 2308 int a_op; 2309 struct flock *a_fl; 2310 int a_flags; 2311 } */ *ap = v; 2312 struct vnode *vp = ap->a_vp; 2313 struct udf_node *udf_node = VTOI(vp); 2314 struct file_entry *fe; 2315 struct extfile_entry *efe; 2316 uint64_t file_size; 2317 2318 DPRINTF(LOCKING, ("udf_advlock called\n")); 2319 2320 /* get directory filesize */ 2321 if (udf_node->fe) { 2322 fe = udf_node->fe; 2323 file_size = udf_rw64(fe->inf_len); 2324 } else { 2325 assert(udf_node->efe); 2326 efe = udf_node->efe; 2327 file_size = udf_rw64(efe->inf_len); 2328 } 2329 2330 return lf_advlock(ap, &udf_node->lockf, file_size); 2331 } 2332 2333 /* --------------------------------------------------------------------- */ 2334 2335 /* Global vfs vnode data structures for udfs */ 2336 int (**udf_vnodeop_p)(void *); 2337 2338 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2339 { &vop_default_desc, vn_default_error }, 2340 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2341 { &vop_create_desc, udf_create }, /* create */ 2342 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2343 { &vop_open_desc, udf_open }, /* open */ 2344 { &vop_close_desc, udf_close }, /* close */ 2345 { &vop_access_desc, udf_access }, /* access */ 2346 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2347 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2348 { &vop_read_desc, udf_read }, /* read */ 2349 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2350 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2351 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2352 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2353 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2354 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2355 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2356 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2357 { &vop_seek_desc, genfs_seek }, /* seek */ 2358 { &vop_remove_desc, udf_remove }, /* remove */ 2359 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2360 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2361 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2362 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2363 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2364 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2365 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2366 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2367 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2368 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2369 { &vop_lock_desc, genfs_lock }, /* lock */ 2370 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2371 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2372 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2373 /* { &vop_print_desc, udf_print }, */ /* print */ 2374 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2375 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2376 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2377 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2378 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2379 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2380 { NULL, NULL } 2381 }; 2382 2383 2384 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2385 &udf_vnodeop_p, udf_vnodeop_entries 2386 }; 2387 2388