udf_vnops.c revision 1.30.4.8
1 /* $NetBSD: udf_vnops.c,v 1.30.4.8 2009/09/26 18:38:07 snj 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 1.30.4.8 2009/09/26 18:38:07 snj 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, 0); 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")); 108 109 *ap->a_recycle = false; 110 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 111 /* remove this file's allocation */ 112 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 113 *ap->a_recycle = true; 114 udf_delete_node(udf_node); 115 VOP_UNLOCK(vp, 0); 116 vrecycle(vp, NULL, curlwp); 117 return 0; 118 } 119 120 /* write out its node */ 121 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 122 udf_update(vp, NULL, NULL, NULL, 0); 123 VOP_UNLOCK(vp, 0); 124 125 return 0; 126 } 127 128 /* --------------------------------------------------------------------- */ 129 130 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 131 132 int 133 udf_reclaim(void *v) 134 { 135 struct vop_reclaim_args /* { 136 struct vnode *a_vp; 137 } */ *ap = v; 138 struct vnode *vp = ap->a_vp; 139 struct udf_node *udf_node = VTOI(vp); 140 141 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 142 if (prtactive && vp->v_usecount > 1) 143 vprint("udf_reclaim(): pushing active", vp); 144 145 if (udf_node == NULL) { 146 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 147 return 0; 148 } 149 150 /* update note for closure */ 151 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 152 153 /* async check to see if all node descriptors are written out */ 154 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 155 vprint("udf_reclaim(): waiting for writeout\n", vp); 156 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 157 } 158 159 /* purge old data from namei */ 160 cache_purge(vp); 161 162 /* dispose all node knowledge */ 163 udf_dispose_node(udf_node); 164 165 return 0; 166 } 167 168 /* --------------------------------------------------------------------- */ 169 170 int 171 udf_read(void *v) 172 { 173 struct vop_read_args /* { 174 struct vnode *a_vp; 175 struct uio *a_uio; 176 int a_ioflag; 177 kauth_cred_t a_cred; 178 } */ *ap = v; 179 struct vnode *vp = ap->a_vp; 180 struct uio *uio = ap->a_uio; 181 int ioflag = ap->a_ioflag; 182 int advice = IO_ADV_DECODE(ap->a_ioflag); 183 struct uvm_object *uobj; 184 struct udf_node *udf_node = VTOI(vp); 185 struct file_entry *fe; 186 struct extfile_entry *efe; 187 uint64_t file_size; 188 vsize_t len; 189 void *win; 190 int error; 191 int flags; 192 193 /* 194 * XXX reading from extended attributes not yet implemented. FreeBSD 195 * has it in mind to forward the IO_EXT read call to the 196 * VOP_READEXTATTR(). 197 */ 198 199 DPRINTF(READ, ("udf_read called\n")); 200 201 /* can this happen? some filingsystems have this check */ 202 if (uio->uio_offset < 0) 203 return EINVAL; 204 if (uio->uio_resid == 0) 205 return 0; 206 207 /* protect against rogue programs reading raw directories and links */ 208 if ((ioflag & IO_ALTSEMANTICS) == 0) { 209 if (vp->v_type == VDIR) 210 return EISDIR; 211 /* all but regular files just give EINVAL */ 212 if (vp->v_type != VREG) 213 return EINVAL; 214 } 215 216 assert(udf_node); 217 assert(udf_node->fe || udf_node->efe); 218 219 /* get file/directory filesize */ 220 if (udf_node->fe) { 221 fe = udf_node->fe; 222 file_size = udf_rw64(fe->inf_len); 223 } else { 224 assert(udf_node->efe); 225 efe = udf_node->efe; 226 file_size = udf_rw64(efe->inf_len); 227 } 228 229 /* read contents using buffercache */ 230 uobj = &vp->v_uobj; 231 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 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 win = ubc_alloc(uobj, uio->uio_offset, &len, 245 advice, UBC_READ); 246 error = uiomove(win, len, uio); 247 ubc_release(win, flags); 248 if (error) 249 break; 250 } 251 252 /* note access time unless not requested */ 253 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 254 udf_node->i_flags |= IN_ACCESS; 255 if ((ioflag & IO_SYNC) == IO_SYNC) 256 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 257 } 258 259 return error; 260 } 261 262 /* --------------------------------------------------------------------- */ 263 264 int 265 udf_write(void *v) 266 { 267 struct vop_write_args /* { 268 struct vnode *a_vp; 269 struct uio *a_uio; 270 int a_ioflag; 271 kauth_cred_t a_cred; 272 } */ *ap = v; 273 struct vnode *vp = ap->a_vp; 274 struct uio *uio = ap->a_uio; 275 int ioflag = ap->a_ioflag; 276 kauth_cred_t cred = ap->a_cred; 277 int advice = IO_ADV_DECODE(ap->a_ioflag); 278 struct uvm_object *uobj; 279 struct udf_node *udf_node = VTOI(vp); 280 struct file_entry *fe; 281 struct extfile_entry *efe; 282 void *win; 283 uint64_t file_size, old_size, old_offset; 284 vsize_t len; 285 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 286 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 287 int error; 288 int flags, resid, extended; 289 290 /* 291 * XXX writing to extended attributes not yet implemented. FreeBSD has 292 * it in mind to forward the IO_EXT read call to the 293 * VOP_READEXTATTR(). 294 */ 295 296 DPRINTF(WRITE, ("udf_write called\n")); 297 298 /* can this happen? some filingsystems have this check */ 299 if (uio->uio_offset < 0) 300 return EINVAL; 301 if (uio->uio_resid == 0) 302 return 0; 303 304 /* protect against rogue programs writing raw directories or links */ 305 if ((ioflag & IO_ALTSEMANTICS) == 0) { 306 if (vp->v_type == VDIR) 307 return EISDIR; 308 /* all but regular files just give EINVAL for now */ 309 if (vp->v_type != VREG) 310 return EINVAL; 311 } 312 313 assert(udf_node); 314 assert(udf_node->fe || udf_node->efe); 315 316 /* get file/directory filesize */ 317 if (udf_node->fe) { 318 fe = udf_node->fe; 319 file_size = udf_rw64(fe->inf_len); 320 } else { 321 assert(udf_node->efe); 322 efe = udf_node->efe; 323 file_size = udf_rw64(efe->inf_len); 324 } 325 old_size = file_size; 326 327 /* if explicitly asked to append, uio_offset can be wrong? */ 328 if (ioflag & IO_APPEND) 329 uio->uio_offset = file_size; 330 331 extended = (uio->uio_offset + uio->uio_resid > file_size); 332 if (extended) { 333 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 334 file_size, uio->uio_offset + uio->uio_resid)); 335 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 336 if (error) 337 return error; 338 file_size = uio->uio_offset + uio->uio_resid; 339 } 340 341 /* write contents using buffercache */ 342 uobj = &vp->v_uobj; 343 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 344 resid = uio->uio_resid; 345 error = 0; 346 347 uvm_vnp_setwritesize(vp, file_size); 348 old_offset = uio->uio_offset; 349 while (uio->uio_resid > 0) { 350 /* maximise length to file extremity */ 351 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 352 if (len == 0) 353 break; 354 355 /* ubc, here we come, prepare to trap */ 356 win = ubc_alloc(uobj, uio->uio_offset, &len, 357 advice, UBC_WRITE); 358 genfs_node_wrlock(vp); 359 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 360 genfs_node_unlock(vp); 361 362 if (!error) 363 error = uiomove(win, len, uio); 364 ubc_release(win, flags); 365 if (error) 366 break; 367 368 /* 369 * flush what we just wrote if necessary. 370 * XXXUBC simplistic async flushing. 371 * 372 * Directories are excluded since its file data that we want 373 * to purge. 374 */ 375 if (!async && (vp->v_type != VDIR) && 376 (old_offset >> 16 != uio->uio_offset >> 16)) { 377 mutex_enter(&vp->v_interlock); 378 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 379 (uio->uio_offset >> 16) << 16, PGO_CLEANIT); 380 old_offset = uio->uio_offset; 381 } 382 } 383 uvm_vnp_setsize(vp, file_size); 384 385 /* mark node changed and request update */ 386 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 387 388 /* 389 * XXX TODO FFS has code here to reset setuid & setgid when we're not 390 * the superuser as a precaution against tampering. 391 */ 392 393 /* if we wrote a thing, note write action on vnode */ 394 if (resid > uio->uio_resid) 395 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 396 397 if (error) { 398 /* bring back file size to its former size */ 399 /* take notice of its errors? */ 400 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 401 402 /* roll back uio */ 403 uio->uio_offset -= resid - uio->uio_resid; 404 uio->uio_resid = resid; 405 } else { 406 /* if we write and we're synchronous, update node */ 407 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 408 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 409 } 410 411 return error; 412 } 413 414 415 /* --------------------------------------------------------------------- */ 416 417 /* 418 * `Special' bmap functionality that translates all incomming requests to 419 * translate to vop_strategy() calls with the same blocknumbers effectively 420 * not translating at all. 421 */ 422 423 int 424 udf_trivial_bmap(void *v) 425 { 426 struct vop_bmap_args /* { 427 struct vnode *a_vp; 428 daddr_t a_bn; 429 struct vnode **a_vpp; 430 daddr_t *a_bnp; 431 int *a_runp; 432 } */ *ap = v; 433 struct vnode *vp = ap->a_vp; /* our node */ 434 struct vnode **vpp = ap->a_vpp; /* return node */ 435 daddr_t *bnp = ap->a_bnp; /* translated */ 436 daddr_t bn = ap->a_bn; /* origional */ 437 int *runp = ap->a_runp; 438 struct udf_node *udf_node = VTOI(vp); 439 uint32_t lb_size; 440 441 /* get logical block size */ 442 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 443 444 /* could return `-1' to indicate holes/zeros */ 445 /* translate 1:1 */ 446 *bnp = bn; 447 448 /* set the vnode to read the data from with strategy on itself */ 449 if (vpp) 450 *vpp = vp; 451 452 /* set runlength of maximum block size */ 453 if (runp) 454 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 455 456 /* return success */ 457 return 0; 458 } 459 460 /* --------------------------------------------------------------------- */ 461 462 int 463 udf_vfsstrategy(void *v) 464 { 465 struct vop_strategy_args /* { 466 struct vnode *a_vp; 467 struct buf *a_bp; 468 } */ *ap = v; 469 struct vnode *vp = ap->a_vp; 470 struct buf *bp = ap->a_bp; 471 struct udf_node *udf_node = VTOI(vp); 472 uint32_t lb_size, from, sectors; 473 int error; 474 475 DPRINTF(STRATEGY, ("udf_strategy called\n")); 476 477 /* check if we ought to be here */ 478 if (vp->v_type == VBLK || vp->v_type == VCHR) 479 panic("udf_strategy: spec"); 480 481 /* only filebuffers ought to be read/write by this, no descriptors */ 482 assert(bp->b_blkno >= 0); 483 484 /* get sector size */ 485 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 486 487 /* calculate sector to start from */ 488 from = bp->b_blkno; 489 490 /* calculate length to fetch/store in sectors */ 491 sectors = bp->b_bcount / lb_size; 492 assert(bp->b_bcount > 0); 493 494 /* NEVER assume later that this buffer is already translated */ 495 /* bp->b_lblkno = bp->b_blkno; */ 496 497 /* check assertions: we OUGHT to always get multiples of this */ 498 assert(sectors * lb_size == bp->b_bcount); 499 500 /* issue buffer */ 501 error = 0; 502 if (bp->b_flags & B_READ) { 503 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 504 ", sector %d for %d sectors\n", 505 vp, bp, bp->b_blkno, from, sectors)); 506 507 /* read buffer from the udf_node, translate vtop on the way*/ 508 udf_read_filebuf(udf_node, bp); 509 } else { 510 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 511 ", sector %d for %d sectors\n", 512 vp, bp, bp->b_blkno, from, sectors)); 513 514 /* write buffer to the udf_node, translate vtop on the way*/ 515 udf_write_filebuf(udf_node, bp); 516 } 517 518 return bp->b_error; 519 } 520 521 /* --------------------------------------------------------------------- */ 522 523 int 524 udf_readdir(void *v) 525 { 526 struct vop_readdir_args /* { 527 struct vnode *a_vp; 528 struct uio *a_uio; 529 kauth_cred_t a_cred; 530 int *a_eofflag; 531 off_t **a_cookies; 532 int *a_ncookies; 533 } */ *ap = v; 534 struct uio *uio = ap->a_uio; 535 struct vnode *vp = ap->a_vp; 536 struct udf_node *udf_node = VTOI(vp); 537 struct file_entry *fe; 538 struct extfile_entry *efe; 539 struct fileid_desc *fid; 540 struct dirent *dirent; 541 uint64_t file_size, diroffset, transoffset; 542 uint32_t lb_size; 543 int error; 544 545 DPRINTF(READDIR, ("udf_readdir called\n")); 546 547 /* This operation only makes sense on directory nodes. */ 548 if (vp->v_type != VDIR) 549 return ENOTDIR; 550 551 /* get directory filesize */ 552 if (udf_node->fe) { 553 fe = udf_node->fe; 554 file_size = udf_rw64(fe->inf_len); 555 } else { 556 assert(udf_node->efe); 557 efe = udf_node->efe; 558 file_size = udf_rw64(efe->inf_len); 559 } 560 561 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 562 563 /* 564 * Add `.' pseudo entry if at offset zero since its not in the fid 565 * stream 566 */ 567 if (uio->uio_offset == 0) { 568 DPRINTF(READDIR, ("\t'.' inserted\n")); 569 strcpy(dirent->d_name, "."); 570 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 571 dirent->d_type = DT_DIR; 572 dirent->d_namlen = strlen(dirent->d_name); 573 dirent->d_reclen = _DIRENT_SIZE(dirent); 574 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 575 576 /* mark with magic value that we have done the dummy */ 577 uio->uio_offset = UDF_DIRCOOKIE_DOT; 578 } 579 580 /* we are called just as long as we keep on pushing data in */ 581 error = 0; 582 if (uio->uio_offset < file_size) { 583 /* allocate temporary space for fid */ 584 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 585 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 586 587 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 588 uio->uio_offset = 0; 589 590 diroffset = uio->uio_offset; 591 transoffset = diroffset; 592 while (diroffset < file_size) { 593 DPRINTF(READDIR, ("\tread in fid stream\n")); 594 /* transfer a new fid/dirent */ 595 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 596 DPRINTFIF(READDIR, error, ("read error in read fid " 597 "stream : %d\n", error)); 598 if (error) 599 break; 600 601 /* 602 * If there isn't enough space in the uio to return a 603 * whole dirent, break off read 604 */ 605 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 606 break; 607 608 /* remember the last entry we transfered */ 609 transoffset = diroffset; 610 611 /* skip deleted entries */ 612 if (fid->file_char & UDF_FILE_CHAR_DEL) 613 continue; 614 615 /* skip not visible files */ 616 if (fid->file_char & UDF_FILE_CHAR_VIS) 617 continue; 618 619 /* copy dirent to the caller */ 620 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 621 dirent->d_name, dirent->d_type)); 622 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 623 } 624 625 /* pass on last transfered offset */ 626 uio->uio_offset = transoffset; 627 free(fid, M_UDFTEMP); 628 } 629 630 if (ap->a_eofflag) 631 *ap->a_eofflag = (uio->uio_offset >= file_size); 632 633 #ifdef DEBUG 634 if (udf_verbose & UDF_DEBUG_READDIR) { 635 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 636 if (ap->a_eofflag) 637 printf("returning EOF ? %d\n", *ap->a_eofflag); 638 if (error) 639 printf("readdir returning error %d\n", error); 640 } 641 #endif 642 643 free(dirent, M_UDFTEMP); 644 return error; 645 } 646 647 /* --------------------------------------------------------------------- */ 648 649 int 650 udf_lookup(void *v) 651 { 652 struct vop_lookup_args /* { 653 struct vnode *a_dvp; 654 struct vnode **a_vpp; 655 struct componentname *a_cnp; 656 } */ *ap = v; 657 struct vnode *dvp = ap->a_dvp; 658 struct vnode **vpp = ap->a_vpp; 659 struct componentname *cnp = ap->a_cnp; 660 struct udf_node *dir_node, *res_node; 661 struct udf_mount *ump; 662 struct long_ad icb_loc; 663 const char *name; 664 int namelen, nameiop, islastcn, mounted_ro; 665 int vnodetp; 666 int error, found; 667 668 dir_node = VTOI(dvp); 669 ump = dir_node->ump; 670 *vpp = NULL; 671 672 DPRINTF(LOOKUP, ("udf_lookup called\n")); 673 674 /* simplify/clarification flags */ 675 nameiop = cnp->cn_nameiop; 676 islastcn = cnp->cn_flags & ISLASTCN; 677 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 678 679 /* check exec/dirread permissions first */ 680 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 681 if (error) 682 return error; 683 684 DPRINTF(LOOKUP, ("\taccess ok\n")); 685 686 /* 687 * If requesting a modify on the last path element on a read-only 688 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 689 */ 690 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 691 return EROFS; 692 693 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 694 cnp->cn_nameptr)); 695 /* look in the nami cache; returns 0 on success!! */ 696 error = cache_lookup(dvp, vpp, cnp); 697 if (error >= 0) 698 return error; 699 700 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 701 702 /* 703 * Obviously, the file is not (anymore) in the namecache, we have to 704 * search for it. There are three basic cases: '.', '..' and others. 705 * 706 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 707 */ 708 error = 0; 709 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 710 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 711 /* special case 1 '.' */ 712 VREF(dvp); 713 *vpp = dvp; 714 /* done */ 715 } else if (cnp->cn_flags & ISDOTDOT) { 716 /* special case 2 '..' */ 717 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 718 719 /* get our node */ 720 name = ".."; 721 namelen = 2; 722 error = udf_lookup_name_in_dir(dvp, name, namelen, 723 &icb_loc, &found); 724 if (error) 725 goto out; 726 if (!found) 727 error = ENOENT; 728 729 /* first unlock parent */ 730 VOP_UNLOCK(dvp, 0); 731 732 if (error == 0) { 733 DPRINTF(LOOKUP, ("\tfound '..'\n")); 734 /* try to create/reuse the node */ 735 error = udf_get_node(ump, &icb_loc, &res_node); 736 737 if (!error) { 738 DPRINTF(LOOKUP, 739 ("\tnode retrieved/created OK\n")); 740 *vpp = res_node->vnode; 741 } 742 } 743 744 /* try to relock parent */ 745 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 746 } else { 747 DPRINTF(LOOKUP, ("\tlookup file\n")); 748 /* all other files */ 749 /* lookup filename in the directory; location icb_loc */ 750 name = cnp->cn_nameptr; 751 namelen = cnp->cn_namelen; 752 error = udf_lookup_name_in_dir(dvp, name, namelen, 753 &icb_loc, &found); 754 if (error) 755 goto out; 756 if (!found) { 757 DPRINTF(LOOKUP, ("\tNOT found\n")); 758 /* 759 * UGH, didn't find name. If we're creating or 760 * renaming on the last name this is OK and we ought 761 * to return EJUSTRETURN if its allowed to be created. 762 */ 763 error = ENOENT; 764 if (islastcn && 765 (nameiop == CREATE || nameiop == RENAME)) 766 error = 0; 767 if (!error) { 768 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 769 if (!error) { 770 /* keep the component name */ 771 cnp->cn_flags |= SAVENAME; 772 error = EJUSTRETURN; 773 } 774 } 775 /* done */ 776 } else { 777 /* try to create/reuse the node */ 778 error = udf_get_node(ump, &icb_loc, &res_node); 779 if (!error) { 780 /* 781 * If we are not at the last path component 782 * and found a non-directory or non-link entry 783 * (which may itself be pointing to a 784 * directory), raise an error. 785 */ 786 vnodetp = res_node->vnode->v_type; 787 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 788 if (!islastcn) 789 error = ENOTDIR; 790 } 791 792 } 793 if (!error) { 794 *vpp = res_node->vnode; 795 } 796 } 797 } 798 799 out: 800 /* 801 * Store result in the cache if requested. If we are creating a file, 802 * the file might not be found and thus putting it into the namecache 803 * might be seen as negative caching. 804 */ 805 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 806 cache_enter(dvp, *vpp, cnp); 807 808 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 809 810 return error; 811 } 812 813 /* --------------------------------------------------------------------- */ 814 815 int 816 udf_getattr(void *v) 817 { 818 struct vop_getattr_args /* { 819 struct vnode *a_vp; 820 struct vattr *a_vap; 821 kauth_cred_t a_cred; 822 struct lwp *a_l; 823 } */ *ap = v; 824 struct vnode *vp = ap->a_vp; 825 struct udf_node *udf_node = VTOI(vp); 826 struct udf_mount *ump = udf_node->ump; 827 struct file_entry *fe = udf_node->fe; 828 struct extfile_entry *efe = udf_node->efe; 829 struct filetimes_extattr_entry *ft_extattr; 830 struct device_extattr_entry *devattr; 831 struct vattr *vap = ap->a_vap; 832 struct timestamp *atime, *mtime, *attrtime, *creatime; 833 uint64_t filesize, blkssize; 834 uint32_t nlink; 835 uint32_t offset, a_l; 836 uint8_t *filedata; 837 uid_t uid; 838 gid_t gid; 839 int error; 840 841 DPRINTF(CALL, ("udf_getattr called\n")); 842 843 /* update times before we returning values */ 844 udf_itimes(udf_node, NULL, NULL, NULL); 845 846 /* get descriptor information */ 847 if (fe) { 848 nlink = udf_rw16(fe->link_cnt); 849 uid = (uid_t)udf_rw32(fe->uid); 850 gid = (gid_t)udf_rw32(fe->gid); 851 filesize = udf_rw64(fe->inf_len); 852 blkssize = udf_rw64(fe->logblks_rec); 853 atime = &fe->atime; 854 mtime = &fe->mtime; 855 attrtime = &fe->attrtime; 856 filedata = fe->data; 857 858 /* initial guess */ 859 creatime = mtime; 860 861 /* check our extended attribute if present */ 862 error = udf_extattr_search_intern(udf_node, 863 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 864 if (!error) { 865 ft_extattr = (struct filetimes_extattr_entry *) 866 (filedata + offset); 867 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 868 creatime = &ft_extattr->times[0]; 869 } 870 } else { 871 assert(udf_node->efe); 872 nlink = udf_rw16(efe->link_cnt); 873 uid = (uid_t)udf_rw32(efe->uid); 874 gid = (gid_t)udf_rw32(efe->gid); 875 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 876 blkssize = udf_rw64(efe->logblks_rec); 877 atime = &efe->atime; 878 mtime = &efe->mtime; 879 attrtime = &efe->attrtime; 880 creatime = &efe->ctime; 881 filedata = efe->data; 882 } 883 884 /* do the uid/gid translation game */ 885 if (uid == (uid_t) -1) 886 uid = ump->mount_args.anon_uid; 887 if (gid == (gid_t) -1) 888 gid = ump->mount_args.anon_gid; 889 890 /* fill in struct vattr with values from the node */ 891 VATTR_NULL(vap); 892 vap->va_type = vp->v_type; 893 vap->va_mode = udf_getaccessmode(udf_node); 894 vap->va_nlink = nlink; 895 vap->va_uid = uid; 896 vap->va_gid = gid; 897 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 898 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 899 vap->va_size = filesize; 900 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 901 902 /* 903 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 904 * 1 to the link count if its a directory we're requested attributes 905 * of. 906 */ 907 if (vap->va_type == VDIR) 908 vap->va_nlink++; 909 910 /* access times */ 911 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 912 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 913 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 914 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 915 916 vap->va_gen = 1; /* no multiple generations yes (!?) */ 917 vap->va_flags = 0; /* no flags */ 918 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 919 vap->va_filerev = 1; /* TODO file revision numbers? */ 920 vap->va_vaflags = 0; 921 /* TODO get vaflags from the extended attributes? */ 922 923 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 924 error = udf_extattr_search_intern(udf_node, 925 UDF_DEVICESPEC_ATTR_NO, "", 926 &offset, &a_l); 927 /* if error, deny access */ 928 if (error || (filedata == NULL)) { 929 vap->va_mode = 0; /* or v_type = VNON? */ 930 } else { 931 devattr = (struct device_extattr_entry *) 932 filedata + offset; 933 vap->va_rdev = makedev( 934 udf_rw32(devattr->major), 935 udf_rw32(devattr->minor) 936 ); 937 /* TODO we could check the implementator */ 938 } 939 } 940 941 return 0; 942 } 943 944 /* --------------------------------------------------------------------- */ 945 946 static int 947 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 948 kauth_cred_t cred) 949 { 950 struct udf_node *udf_node = VTOI(vp); 951 uid_t euid, uid; 952 gid_t egid, gid; 953 int issuperuser, ismember; 954 int error; 955 956 #ifdef notyet 957 /* TODO get vaflags from the extended attributes? */ 958 /* Immutable or append-only files cannot be modified, either. */ 959 if (udf_node->flags & (IMMUTABLE | APPEND)) 960 return EPERM; 961 #endif 962 963 if (vp->v_mount->mnt_flag & MNT_RDONLY) 964 return EROFS; 965 966 /* retrieve old values */ 967 udf_getownership(udf_node, &uid, &gid); 968 969 /* only one could be specified */ 970 if (new_uid == VNOVAL) 971 new_uid = uid; 972 if (new_gid == VNOVAL) 973 new_gid = gid; 974 975 /* check if we can fit it in an 32 bits */ 976 if ((uid_t) ((uint32_t) uid) != uid) 977 return EINVAL; 978 if ((gid_t) ((uint32_t) gid) != gid) 979 return EINVAL; 980 981 /* 982 * If we don't own the file, are trying to change the owner of the 983 * file, or are not a member of the target group, the caller's 984 * credentials must imply super-user privilege or the call fails. 985 */ 986 987 /* check permissions */ 988 euid = kauth_cred_geteuid(cred); 989 egid = kauth_cred_getegid(cred); 990 if ((error = kauth_cred_ismember_gid(cred, new_gid, &ismember))) 991 return error; 992 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 993 issuperuser = (error == 0); 994 995 if (!issuperuser) { 996 if ((new_uid != uid) || (euid != uid)) 997 return EPERM; 998 if ((new_gid != gid) && !(egid == new_gid || ismember)) 999 return EPERM; 1000 } 1001 1002 /* change the ownership */ 1003 udf_setownership(udf_node, new_uid, new_gid); 1004 1005 /* mark node changed */ 1006 udf_node->i_flags |= IN_CHANGE; 1007 1008 return 0; 1009 } 1010 1011 1012 static int 1013 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1014 { 1015 struct udf_node *udf_node = VTOI(vp); 1016 uid_t euid, uid; 1017 gid_t egid, gid; 1018 int issuperuser, ismember; 1019 int error; 1020 1021 #ifdef notyet 1022 /* TODO get vaflags from the extended attributes? */ 1023 /* Immutable or append-only files cannot be modified, either. */ 1024 if (udf_node->flags & (IMMUTABLE | APPEND)) 1025 return EPERM; 1026 #endif 1027 1028 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1029 return EROFS; 1030 1031 /* retrieve uid/gid values */ 1032 udf_getownership(udf_node, &uid, &gid); 1033 1034 /* check permissions */ 1035 euid = kauth_cred_geteuid(cred); 1036 egid = kauth_cred_getegid(cred); 1037 if ((error = kauth_cred_ismember_gid(cred, gid, &ismember))) 1038 return error; 1039 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1040 issuperuser = (error == 0); 1041 1042 if ((euid != uid) && !issuperuser) 1043 return EPERM; 1044 if (euid != 0) { 1045 if (vp->v_type != VDIR && (mode & S_ISTXT)) 1046 return EFTYPE; 1047 1048 if ((!ismember) && (mode & S_ISGID)) 1049 return EPERM; 1050 } 1051 1052 /* change mode */ 1053 udf_setaccessmode(udf_node, mode); 1054 1055 /* mark node changed */ 1056 udf_node->i_flags |= IN_CHANGE; 1057 1058 return 0; 1059 } 1060 1061 1062 /* exported */ 1063 int 1064 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1065 { 1066 struct udf_node *udf_node = VTOI(vp); 1067 int error, extended; 1068 1069 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1070 return EROFS; 1071 1072 /* Decide whether this is a valid operation based on the file type. */ 1073 switch (vp->v_type) { 1074 case VDIR: 1075 return EISDIR; 1076 case VREG: 1077 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1078 return EROFS; 1079 break; 1080 case VBLK: 1081 /* FALLTHROUGH */ 1082 case VCHR: 1083 /* FALLTHROUGH */ 1084 case VFIFO: 1085 /* Allow modifications of special files even if in the file 1086 * system is mounted read-only (we are not modifying the 1087 * files themselves, but the objects they represent). */ 1088 return 0; 1089 default: 1090 /* Anything else is unsupported. */ 1091 return EOPNOTSUPP; 1092 } 1093 1094 #if notyet 1095 /* TODO get vaflags from the extended attributes? */ 1096 /* Immutable or append-only files cannot be modified, either. */ 1097 if (node->flags & (IMMUTABLE | APPEND)) 1098 return EPERM; 1099 #endif 1100 1101 /* resize file to the requested size */ 1102 error = udf_resize_node(udf_node, newsize, &extended); 1103 1104 if (error == 0) { 1105 /* mark change */ 1106 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1107 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1108 udf_update(vp, NULL, NULL, NULL, 0); 1109 } 1110 1111 return error; 1112 } 1113 1114 1115 static int 1116 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1117 { 1118 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1119 return EROFS; 1120 1121 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1122 1123 return 0; 1124 } 1125 1126 1127 static int 1128 udf_chtimes(struct vnode *vp, 1129 struct timespec *atime, struct timespec *mtime, 1130 struct timespec *birthtime, int setattrflags, 1131 kauth_cred_t cred) 1132 { 1133 struct udf_node *udf_node = VTOI(vp); 1134 uid_t euid, uid; 1135 gid_t gid; 1136 int issuperuser; 1137 int error; 1138 1139 #ifdef notyet 1140 /* TODO get vaflags from the extended attributes? */ 1141 /* Immutable or append-only files cannot be modified, either. */ 1142 if (udf_node->flags & (IMMUTABLE | APPEND)) 1143 return EPERM; 1144 #endif 1145 1146 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1147 return EROFS; 1148 1149 /* retrieve uid/gid values */ 1150 udf_getownership(udf_node, &uid, &gid); 1151 1152 /* check permissions */ 1153 euid = kauth_cred_geteuid(cred); 1154 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1155 issuperuser = (error == 0); 1156 1157 if (!issuperuser) { 1158 if (euid != uid) 1159 return EPERM; 1160 if ((setattrflags & VA_UTIMES_NULL) == 0) { 1161 error = VOP_ACCESS(vp, VWRITE, cred); 1162 if (error) 1163 return error; 1164 } 1165 } 1166 1167 /* update node flags depending on what times are passed */ 1168 if (atime->tv_sec != VNOVAL) 1169 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1170 udf_node->i_flags |= IN_ACCESS; 1171 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1172 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1173 1174 return udf_update(vp, atime, mtime, birthtime, 0); 1175 } 1176 1177 1178 int 1179 udf_setattr(void *v) 1180 { 1181 struct vop_setattr_args /* { 1182 struct vnode *a_vp; 1183 struct vattr *a_vap; 1184 kauth_cred_t a_cred; 1185 struct lwp *a_l; 1186 } */ *ap = v; 1187 struct vnode *vp = ap->a_vp; 1188 /* struct udf_node *udf_node = VTOI(vp); */ 1189 /* struct udf_mount *ump = udf_node->ump; */ 1190 kauth_cred_t cred = ap->a_cred; 1191 struct vattr *vap = ap->a_vap; 1192 int error; 1193 1194 DPRINTF(CALL, ("udf_setattr called\n")); 1195 1196 /* Abort if any unsettable attribute is given. */ 1197 error = 0; 1198 if (vap->va_type != VNON || 1199 vap->va_nlink != VNOVAL || 1200 vap->va_fsid != VNOVAL || 1201 vap->va_fileid != VNOVAL || 1202 vap->va_blocksize != VNOVAL || 1203 #ifdef notyet 1204 /* checks are debated */ 1205 vap->va_ctime.tv_sec != VNOVAL || 1206 vap->va_ctime.tv_nsec != VNOVAL || 1207 vap->va_birthtime.tv_sec != VNOVAL || 1208 vap->va_birthtime.tv_nsec != VNOVAL || 1209 #endif 1210 vap->va_gen != VNOVAL || 1211 vap->va_rdev != VNOVAL || 1212 vap->va_bytes != VNOVAL) 1213 error = EINVAL; 1214 1215 DPRINTF(ATTR, ("setattr changing:\n")); 1216 if (error == 0 && (vap->va_flags != VNOVAL)) { 1217 DPRINTF(ATTR, ("\tchflags\n")); 1218 error = udf_chflags(vp, vap->va_flags, cred); 1219 } 1220 1221 if (error == 0 && (vap->va_size != VNOVAL)) { 1222 DPRINTF(ATTR, ("\tchsize\n")); 1223 error = udf_chsize(vp, vap->va_size, cred); 1224 } 1225 1226 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1227 DPRINTF(ATTR, ("\tchown\n")); 1228 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1229 } 1230 1231 if (error == 0 && (vap->va_mode != VNOVAL)) { 1232 DPRINTF(ATTR, ("\tchmod\n")); 1233 error = udf_chmod(vp, vap->va_mode, cred); 1234 } 1235 1236 if (error == 0 && 1237 ((vap->va_atime.tv_sec != VNOVAL && 1238 vap->va_atime.tv_nsec != VNOVAL) || 1239 (vap->va_mtime.tv_sec != VNOVAL && 1240 vap->va_mtime.tv_nsec != VNOVAL)) 1241 ) { 1242 DPRINTF(ATTR, ("\tchtimes\n")); 1243 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1244 &vap->va_birthtime, vap->va_vaflags, cred); 1245 } 1246 VN_KNOTE(vp, NOTE_ATTRIB); 1247 1248 return error; 1249 } 1250 1251 /* --------------------------------------------------------------------- */ 1252 1253 /* 1254 * Return POSIX pathconf information for UDF file systems. 1255 */ 1256 int 1257 udf_pathconf(void *v) 1258 { 1259 struct vop_pathconf_args /* { 1260 struct vnode *a_vp; 1261 int a_name; 1262 register_t *a_retval; 1263 } */ *ap = v; 1264 uint32_t bits; 1265 1266 DPRINTF(CALL, ("udf_pathconf called\n")); 1267 1268 switch (ap->a_name) { 1269 case _PC_LINK_MAX: 1270 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1271 return 0; 1272 case _PC_NAME_MAX: 1273 *ap->a_retval = NAME_MAX; 1274 return 0; 1275 case _PC_PATH_MAX: 1276 *ap->a_retval = PATH_MAX; 1277 return 0; 1278 case _PC_PIPE_BUF: 1279 *ap->a_retval = PIPE_BUF; 1280 return 0; 1281 case _PC_CHOWN_RESTRICTED: 1282 *ap->a_retval = 1; 1283 return 0; 1284 case _PC_NO_TRUNC: 1285 *ap->a_retval = 1; 1286 return 0; 1287 case _PC_SYNC_IO: 1288 *ap->a_retval = 0; /* synchronised is off for performance */ 1289 return 0; 1290 case _PC_FILESIZEBITS: 1291 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1292 bits = 64; /* XXX ought to deliver 65 */ 1293 #if 0 1294 if (udf_node) 1295 bits = 64 * vp->v_mount->mnt_dev_bshift; 1296 #endif 1297 *ap->a_retval = bits; 1298 return 0; 1299 } 1300 1301 return EINVAL; 1302 } 1303 1304 1305 /* --------------------------------------------------------------------- */ 1306 1307 int 1308 udf_open(void *v) 1309 { 1310 struct vop_open_args /* { 1311 struct vnode *a_vp; 1312 int a_mode; 1313 kauth_cred_t a_cred; 1314 struct proc *a_p; 1315 } */ *ap = v; 1316 int flags; 1317 1318 DPRINTF(CALL, ("udf_open called\n")); 1319 1320 /* 1321 * Files marked append-only must be opened for appending. 1322 * TODO: get chflags(2) flags from extened attribute. 1323 */ 1324 flags = 0; 1325 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1326 return (EPERM); 1327 1328 return 0; 1329 } 1330 1331 1332 /* --------------------------------------------------------------------- */ 1333 1334 int 1335 udf_close(void *v) 1336 { 1337 struct vop_close_args /* { 1338 struct vnode *a_vp; 1339 int a_fflag; 1340 kauth_cred_t a_cred; 1341 struct proc *a_p; 1342 } */ *ap = v; 1343 struct vnode *vp = ap->a_vp; 1344 struct udf_node *udf_node = VTOI(vp); 1345 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1346 int error; 1347 1348 DPRINTF(CALL, ("udf_close called\n")); 1349 udf_node = udf_node; /* shut up gcc */ 1350 1351 if (!async && (vp->v_type != VDIR)) { 1352 mutex_enter(&vp->v_interlock); 1353 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1354 if (error) 1355 return error; 1356 } 1357 1358 mutex_enter(&vp->v_interlock); 1359 if (vp->v_usecount > 1) 1360 udf_itimes(udf_node, NULL, NULL, NULL); 1361 mutex_exit(&vp->v_interlock); 1362 1363 return 0; 1364 } 1365 1366 1367 /* --------------------------------------------------------------------- */ 1368 1369 int 1370 udf_access(void *v) 1371 { 1372 struct vop_access_args /* { 1373 struct vnode *a_vp; 1374 int a_mode; 1375 kauth_cred_t a_cred; 1376 struct proc *a_p; 1377 } */ *ap = v; 1378 struct vnode *vp = ap->a_vp; 1379 mode_t mode = ap->a_mode; 1380 kauth_cred_t cred = ap->a_cred; 1381 /* struct udf_node *udf_node = VTOI(vp); */ 1382 struct vattr vap; 1383 int flags; 1384 int error; 1385 1386 DPRINTF(CALL, ("udf_access called\n")); 1387 1388 error = VOP_GETATTR(vp, &vap, NULL); 1389 if (error) 1390 return error; 1391 1392 /* check if we are allowed to write */ 1393 switch (vap.va_type) { 1394 case VDIR: 1395 case VLNK: 1396 case VREG: 1397 /* 1398 * normal nodes: check if we're on a read-only mounted 1399 * filingsystem and bomb out if we're trying to write. 1400 */ 1401 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1402 return EROFS; 1403 break; 1404 case VBLK: 1405 case VCHR: 1406 case VSOCK: 1407 case VFIFO: 1408 /* 1409 * special nodes: even on read-only mounted filingsystems 1410 * these are allowed to be written to if permissions allow. 1411 */ 1412 break; 1413 default: 1414 /* no idea what this is */ 1415 return EINVAL; 1416 } 1417 1418 /* noone may write immutable files */ 1419 /* TODO: get chflags(2) flags from extened attribute. */ 1420 flags = 0; 1421 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1422 return EPERM; 1423 1424 /* ask the generic vaccess to advice on security */ 1425 return vaccess(vp->v_type, 1426 vap.va_mode, vap.va_uid, vap.va_gid, 1427 mode, cred); 1428 } 1429 1430 /* --------------------------------------------------------------------- */ 1431 1432 int 1433 udf_create(void *v) 1434 { 1435 struct vop_create_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_create 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_mknod(void *v) 1460 { 1461 struct vop_mknod_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_mknod 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 int 1485 udf_mkdir(void *v) 1486 { 1487 struct vop_mkdir_args /* { 1488 struct vnode *a_dvp; 1489 struct vnode **a_vpp; 1490 struct componentname *a_cnp; 1491 struct vattr *a_vap; 1492 } */ *ap = v; 1493 struct vnode *dvp = ap->a_dvp; 1494 struct vnode **vpp = ap->a_vpp; 1495 struct vattr *vap = ap->a_vap; 1496 struct componentname *cnp = ap->a_cnp; 1497 int error; 1498 1499 DPRINTF(CALL, ("udf_mkdir called\n")); 1500 error = udf_create_node(dvp, vpp, vap, cnp); 1501 1502 if (error || !(cnp->cn_flags & SAVESTART)) 1503 PNBUF_PUT(cnp->cn_pnbuf); 1504 vput(dvp); 1505 return error; 1506 } 1507 1508 /* --------------------------------------------------------------------- */ 1509 1510 static int 1511 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1512 { 1513 struct udf_node *udf_node, *dir_node; 1514 struct vattr vap; 1515 int error; 1516 1517 DPRINTF(CALL, ("udf_link called\n")); 1518 error = 0; 1519 1520 /* some quick checks */ 1521 if (vp->v_type == VDIR) 1522 return EPERM; /* can't link a directory */ 1523 if (dvp->v_mount != vp->v_mount) 1524 return EXDEV; /* can't link across devices */ 1525 if (dvp == vp) 1526 return EPERM; /* can't be the same */ 1527 1528 /* lock node */ 1529 error = vn_lock(vp, LK_EXCLUSIVE); 1530 if (error) 1531 return error; 1532 1533 /* get attributes */ 1534 dir_node = VTOI(dvp); 1535 udf_node = VTOI(vp); 1536 1537 error = VOP_GETATTR(vp, &vap, FSCRED); 1538 if (error) 1539 return error; 1540 1541 /* check link count overflow */ 1542 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1543 return EMLINK; 1544 1545 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1546 } 1547 1548 int 1549 udf_link(void *v) 1550 { 1551 struct vop_link_args /* { 1552 struct vnode *a_dvp; 1553 struct vnode *a_vp; 1554 struct componentname *a_cnp; 1555 } */ *ap = v; 1556 struct vnode *dvp = ap->a_dvp; 1557 struct vnode *vp = ap->a_vp; 1558 struct componentname *cnp = ap->a_cnp; 1559 int error; 1560 1561 error = udf_do_link(dvp, vp, cnp); 1562 if (error) 1563 VOP_ABORTOP(dvp, cnp); 1564 1565 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1566 VOP_UNLOCK(vp, 0); 1567 1568 VN_KNOTE(vp, NOTE_LINK); 1569 VN_KNOTE(dvp, NOTE_WRITE); 1570 vput(dvp); 1571 1572 return error; 1573 } 1574 1575 /* --------------------------------------------------------------------- */ 1576 1577 static int 1578 udf_do_symlink(struct udf_node *udf_node, char *target) 1579 { 1580 struct pathcomp pathcomp; 1581 uint8_t *pathbuf, *pathpos, *compnamepos; 1582 char *mntonname; 1583 int pathlen, len, compnamelen, mntonnamelen; 1584 int error; 1585 1586 /* process `target' to an UDF structure */ 1587 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1588 pathpos = pathbuf; 1589 pathlen = 0; 1590 1591 if (*target == '/') { 1592 /* symlink starts from the root */ 1593 len = UDF_PATH_COMP_SIZE; 1594 memset(&pathcomp, 0, len); 1595 pathcomp.type = UDF_PATH_COMP_ROOT; 1596 1597 /* check if its mount-point relative! */ 1598 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1599 mntonnamelen = strlen(mntonname); 1600 if (strlen(target) >= mntonnamelen) { 1601 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1602 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1603 target += mntonnamelen; 1604 } 1605 } else { 1606 target++; 1607 } 1608 1609 memcpy(pathpos, &pathcomp, len); 1610 pathpos += len; 1611 pathlen += len; 1612 } 1613 1614 error = 0; 1615 while (*target) { 1616 /* ignore multiple '/' */ 1617 while (*target == '/') { 1618 target++; 1619 } 1620 if (!*target) 1621 break; 1622 1623 /* extract component name */ 1624 compnamelen = 0; 1625 compnamepos = target; 1626 while ((*target) && (*target != '/')) { 1627 target++; 1628 compnamelen++; 1629 } 1630 1631 /* just trunc if too long ?? (security issue) */ 1632 if (compnamelen >= 127) { 1633 error = ENAMETOOLONG; 1634 break; 1635 } 1636 1637 /* convert unix name to UDF name */ 1638 len = sizeof(struct pathcomp); 1639 memset(&pathcomp, 0, len); 1640 pathcomp.type = UDF_PATH_COMP_NAME; 1641 len = UDF_PATH_COMP_SIZE; 1642 1643 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1644 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1645 if ((compnamelen == 1) && (*compnamepos == '.')) 1646 pathcomp.type = UDF_PATH_COMP_CURDIR; 1647 1648 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1649 unix_to_udf_name( 1650 (char *) &pathcomp.ident, &pathcomp.l_ci, 1651 compnamepos, compnamelen, 1652 &udf_node->ump->logical_vol->desc_charset); 1653 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1654 } 1655 1656 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1657 error = ENAMETOOLONG; 1658 break; 1659 } 1660 1661 memcpy(pathpos, &pathcomp, len); 1662 pathpos += len; 1663 pathlen += len; 1664 } 1665 1666 if (error) { 1667 /* aparently too big */ 1668 free(pathbuf, M_UDFTEMP); 1669 return error; 1670 } 1671 1672 error = udf_grow_node(udf_node, pathlen); 1673 if (error) { 1674 /* failed to pregrow node */ 1675 free(pathbuf, M_UDFTEMP); 1676 return error; 1677 } 1678 1679 /* write out structure on the new file */ 1680 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1681 pathbuf, pathlen, 0, 1682 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1683 FSCRED, NULL, NULL); 1684 1685 /* return status of symlink contents writeout */ 1686 free(pathbuf, M_UDFTEMP); 1687 return error; 1688 } 1689 1690 1691 int 1692 udf_symlink(void *v) 1693 { 1694 struct vop_symlink_args /* { 1695 struct vnode *a_dvp; 1696 struct vnode **a_vpp; 1697 struct componentname *a_cnp; 1698 struct vattr *a_vap; 1699 char *a_target; 1700 } */ *ap = v; 1701 struct vnode *dvp = ap->a_dvp; 1702 struct vnode **vpp = ap->a_vpp; 1703 struct vattr *vap = ap->a_vap; 1704 struct componentname *cnp = ap->a_cnp; 1705 struct udf_node *dir_node; 1706 struct udf_node *udf_node; 1707 int error; 1708 1709 DPRINTF(CALL, ("udf_symlink called\n")); 1710 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1711 error = udf_create_node(dvp, vpp, vap, cnp); 1712 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1713 if (!error) { 1714 dir_node = VTOI(dvp); 1715 udf_node = VTOI(*vpp); 1716 KASSERT(udf_node); 1717 error = udf_do_symlink(udf_node, ap->a_target); 1718 if (error) { 1719 /* remove node */ 1720 udf_shrink_node(udf_node, 0); 1721 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1722 } 1723 } 1724 if (error || !(cnp->cn_flags & SAVESTART)) 1725 PNBUF_PUT(cnp->cn_pnbuf); 1726 vput(dvp); 1727 return error; 1728 } 1729 1730 /* --------------------------------------------------------------------- */ 1731 1732 int 1733 udf_readlink(void *v) 1734 { 1735 struct vop_readlink_args /* { 1736 struct vnode *a_vp; 1737 struct uio *a_uio; 1738 kauth_cred_t a_cred; 1739 } */ *ap = v; 1740 struct vnode *vp = ap->a_vp; 1741 struct uio *uio = ap->a_uio; 1742 kauth_cred_t cred = ap->a_cred; 1743 struct udf_node *udf_node; 1744 struct pathcomp pathcomp; 1745 struct vattr vattr; 1746 uint8_t *pathbuf, *targetbuf, *tmpname; 1747 uint8_t *pathpos, *targetpos; 1748 char *mntonname; 1749 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1750 int first, error; 1751 1752 DPRINTF(CALL, ("udf_readlink called\n")); 1753 1754 udf_node = VTOI(vp); 1755 error = VOP_GETATTR(vp, &vattr, cred); 1756 if (error) 1757 return error; 1758 1759 /* claim temporary buffers for translation */ 1760 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1761 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1762 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1763 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1764 memset(targetbuf, 0, PATH_MAX); 1765 1766 /* read contents of file in our temporary buffer */ 1767 error = vn_rdwr(UIO_READ, udf_node->vnode, 1768 pathbuf, vattr.va_size, 0, 1769 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1770 FSCRED, NULL, NULL); 1771 if (error) { 1772 /* failed to read in symlink contents */ 1773 free(pathbuf, M_UDFTEMP); 1774 free(targetbuf, M_UDFTEMP); 1775 free(tmpname, M_UDFTEMP); 1776 return error; 1777 } 1778 1779 /* convert to a unix path */ 1780 pathpos = pathbuf; 1781 pathlen = 0; 1782 targetpos = targetbuf; 1783 targetlen = PATH_MAX; 1784 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1785 mntonnamelen = strlen(mntonname); 1786 1787 error = 0; 1788 first = 1; 1789 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1790 len = UDF_PATH_COMP_SIZE; 1791 memcpy(&pathcomp, pathpos, len); 1792 l_ci = pathcomp.l_ci; 1793 switch (pathcomp.type) { 1794 case UDF_PATH_COMP_ROOT : 1795 /* XXX should check for l_ci; bugcompatible now */ 1796 if ((targetlen < 1) || !first) { 1797 error = EINVAL; 1798 break; 1799 } 1800 *targetpos++ = '/'; targetlen--; 1801 break; 1802 case UDF_PATH_COMP_MOUNTROOT : 1803 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1804 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1805 error = EINVAL; 1806 break; 1807 } 1808 memcpy(targetpos, mntonname, mntonnamelen); 1809 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1810 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1811 /* more follows, so must be directory */ 1812 *targetpos++ = '/'; targetlen--; 1813 } 1814 break; 1815 case UDF_PATH_COMP_PARENTDIR : 1816 /* XXX should check for l_ci; bugcompatible now */ 1817 if (targetlen < 3) { 1818 error = EINVAL; 1819 break; 1820 } 1821 *targetpos++ = '.'; targetlen--; 1822 *targetpos++ = '.'; targetlen--; 1823 *targetpos++ = '/'; targetlen--; 1824 break; 1825 case UDF_PATH_COMP_CURDIR : 1826 /* XXX should check for l_ci; bugcompatible now */ 1827 if (targetlen < 2) { 1828 error = EINVAL; 1829 break; 1830 } 1831 *targetpos++ = '.'; targetlen--; 1832 *targetpos++ = '/'; targetlen--; 1833 break; 1834 case UDF_PATH_COMP_NAME : 1835 if (l_ci == 0) { 1836 error = EINVAL; 1837 break; 1838 } 1839 memset(tmpname, 0, PATH_MAX); 1840 memcpy(&pathcomp, pathpos, len + l_ci); 1841 udf_to_unix_name(tmpname, MAXPATHLEN, 1842 pathcomp.ident, l_ci, 1843 &udf_node->ump->logical_vol->desc_charset); 1844 namelen = strlen(tmpname); 1845 if (targetlen < namelen + 1) { 1846 error = EINVAL; 1847 break; 1848 } 1849 memcpy(targetpos, tmpname, namelen); 1850 targetpos += namelen; targetlen -= namelen; 1851 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1852 /* more follows, so must be directory */ 1853 *targetpos++ = '/'; targetlen--; 1854 } 1855 break; 1856 default : 1857 error = EINVAL; 1858 break; 1859 } 1860 first = 0; 1861 if (error) 1862 break; 1863 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1864 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1865 1866 } 1867 /* all processed? */ 1868 if (vattr.va_size - pathlen > 0) 1869 error = EINVAL; 1870 1871 /* uiomove() to destination */ 1872 if (!error) 1873 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1874 1875 free(pathbuf, M_UDFTEMP); 1876 free(targetbuf, M_UDFTEMP); 1877 free(tmpname, M_UDFTEMP); 1878 1879 return error; 1880 } 1881 1882 /* --------------------------------------------------------------------- */ 1883 1884 /* 1885 * Check if source directory is in the path of the target directory. Target 1886 * is supplied locked, source is unlocked. The target is always vput before 1887 * returning. Modeled after UFS. 1888 * 1889 * If source is on the path from target to the root, return error. 1890 */ 1891 1892 static int 1893 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1894 { 1895 struct udf_mount *ump = target->ump; 1896 struct udf_node *res_node; 1897 struct long_ad icb_loc, *root_icb; 1898 const char *name; 1899 int namelen; 1900 int error, found; 1901 1902 name = ".."; 1903 namelen = 2; 1904 error = 0; 1905 res_node = target; 1906 1907 root_icb = &ump->fileset_desc->rootdir_icb; 1908 1909 /* if nodes are equal, it is no use looking */ 1910 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1911 error = EEXIST; 1912 goto out; 1913 } 1914 1915 /* nothing can exist before the root */ 1916 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1917 error = 0; 1918 goto out; 1919 } 1920 1921 for (;;) { 1922 DPRINTF(NODE, ("udf_on_rootpath : " 1923 "source vp %p, looking at vp %p\n", 1924 source->vnode, res_node->vnode)); 1925 1926 /* sanity check */ 1927 if (res_node->vnode->v_type != VDIR) { 1928 error = ENOTDIR; 1929 goto out; 1930 } 1931 1932 /* go down one level */ 1933 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1934 &icb_loc, &found); 1935 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1936 "found %d\n", error, found)); 1937 1938 if (!found) 1939 error = ENOENT; 1940 if (error) 1941 goto out; 1942 1943 /* did we encounter source node? */ 1944 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1945 error = EINVAL; 1946 goto out; 1947 } 1948 1949 /* did we encounter the root node? */ 1950 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1951 error = 0; 1952 goto out; 1953 } 1954 1955 /* push our intermediate node, we're done with it */ 1956 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1957 vput(res_node->vnode); 1958 1959 DPRINTF(NODE, ("\tgetting the .. node\n")); 1960 error = udf_get_node(ump, &icb_loc, &res_node); 1961 1962 if (error) { /* argh, bail out */ 1963 KASSERT(res_node == NULL); 1964 // res_node = NULL; 1965 goto out; 1966 } 1967 } 1968 out: 1969 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1970 1971 /* put our last node */ 1972 if (res_node) 1973 vput(res_node->vnode); 1974 1975 return error; 1976 } 1977 1978 /* note: i tried to follow the logics of the tmpfs rename code */ 1979 int 1980 udf_rename(void *v) 1981 { 1982 struct vop_rename_args /* { 1983 struct vnode *a_fdvp; 1984 struct vnode *a_fvp; 1985 struct componentname *a_fcnp; 1986 struct vnode *a_tdvp; 1987 struct vnode *a_tvp; 1988 struct componentname *a_tcnp; 1989 } */ *ap = v; 1990 struct vnode *tvp = ap->a_tvp; 1991 struct vnode *tdvp = ap->a_tdvp; 1992 struct vnode *fvp = ap->a_fvp; 1993 struct vnode *fdvp = ap->a_fdvp; 1994 struct componentname *tcnp = ap->a_tcnp; 1995 struct componentname *fcnp = ap->a_fcnp; 1996 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1997 struct vattr fvap, tvap; 1998 int error; 1999 2000 DPRINTF(CALL, ("udf_rename called\n")); 2001 2002 /* disallow cross-device renames */ 2003 if (fvp->v_mount != tdvp->v_mount || 2004 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 2005 error = EXDEV; 2006 goto out_unlocked; 2007 } 2008 2009 fnode = VTOI(fvp); 2010 fdnode = VTOI(fdvp); 2011 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2012 tdnode = VTOI(tdvp); 2013 2014 /* lock our source dir */ 2015 if (fdnode != tdnode) { 2016 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 2017 if (error != 0) 2018 goto out_unlocked; 2019 } 2020 2021 /* get info about the node to be moved */ 2022 error = VOP_GETATTR(fvp, &fvap, FSCRED); 2023 KASSERT(error == 0); 2024 2025 /* check when to delete the old already existing entry */ 2026 if (tvp) { 2027 /* get info about the node to be moved to */ 2028 error = VOP_GETATTR(fvp, &tvap, FSCRED); 2029 KASSERT(error == 0); 2030 2031 /* if both dirs, make sure the destination is empty */ 2032 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 2033 if (tvap.va_nlink > 2) { 2034 error = ENOTEMPTY; 2035 goto out; 2036 } 2037 } 2038 /* if moving dir, make sure destination is dir too */ 2039 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2040 error = ENOTDIR; 2041 goto out; 2042 } 2043 /* if we're moving a non-directory, make sure dest is no dir */ 2044 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2045 error = EISDIR; 2046 goto out; 2047 } 2048 } 2049 2050 /* check if moving a directory to a new parent is allowed */ 2051 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2052 /* release tvp since we might encounter it and lock up */ 2053 if (tvp) 2054 vput(tvp); 2055 2056 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2057 vref(tdvp); 2058 2059 /* search if fnode is a component of tdnode's path to root */ 2060 error = udf_on_rootpath(fnode, tdnode); 2061 2062 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2063 2064 if (error) { 2065 /* compensate for our vref earlier */ 2066 vrele(tdvp); 2067 goto out; 2068 } 2069 2070 /* relock tdvp; its still here due to the vref earlier */ 2071 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2072 2073 /* 2074 * re-lookup tvp since the parent has been unlocked, so could 2075 * have changed/removed in the meantime. 2076 */ 2077 tcnp->cn_flags &= ~SAVESTART; 2078 error = relookup(tdvp, &tvp, tcnp); 2079 if (error) { 2080 vput(tdvp); 2081 goto out; 2082 } 2083 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2084 } 2085 2086 /* remove existing entry if present */ 2087 if (tvp) 2088 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2089 2090 /* create new directory entry for the node */ 2091 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2092 if (error) 2093 goto out; 2094 2095 /* unlink old directory entry for the node, if failing, unattach new */ 2096 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2097 if (error) 2098 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2099 if (error) 2100 goto out; 2101 2102 /* update tnode's '..' if moving directory to new parent */ 2103 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2104 /* update fnode's '..' entry */ 2105 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2106 if (error) { 2107 /* 'try' to recover from this situation */ 2108 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2109 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2110 } 2111 } 2112 2113 out: 2114 if (fdnode != tdnode) 2115 VOP_UNLOCK(fdvp, 0); 2116 2117 out_unlocked: 2118 VOP_ABORTOP(tdvp, tcnp); 2119 if (tdvp == tvp) 2120 vrele(tdvp); 2121 else 2122 vput(tdvp); 2123 if (tvp) 2124 vput(tvp); 2125 VOP_ABORTOP(fdvp, fcnp); 2126 2127 /* release source nodes. */ 2128 vrele(fdvp); 2129 vrele(fvp); 2130 2131 return error; 2132 } 2133 2134 /* --------------------------------------------------------------------- */ 2135 2136 int 2137 udf_remove(void *v) 2138 { 2139 struct vop_remove_args /* { 2140 struct vnode *a_dvp; 2141 struct vnode *a_vp; 2142 struct componentname *a_cnp; 2143 } */ *ap = v; 2144 struct vnode *dvp = ap->a_dvp; 2145 struct vnode *vp = ap->a_vp; 2146 struct componentname *cnp = ap->a_cnp; 2147 struct udf_node *dir_node = VTOI(dvp);; 2148 struct udf_node *udf_node = VTOI(vp); 2149 struct udf_mount *ump = dir_node->ump; 2150 int error; 2151 2152 DPRINTF(CALL, ("udf_remove called\n")); 2153 if (vp->v_type != VDIR) { 2154 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2155 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2156 } else { 2157 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2158 error = EPERM; 2159 } 2160 2161 if (error == 0) { 2162 VN_KNOTE(vp, NOTE_DELETE); 2163 VN_KNOTE(dvp, NOTE_WRITE); 2164 } 2165 2166 if (dvp == vp) 2167 vrele(vp); 2168 else 2169 vput(vp); 2170 vput(dvp); 2171 2172 return error; 2173 } 2174 2175 /* --------------------------------------------------------------------- */ 2176 2177 int 2178 udf_rmdir(void *v) 2179 { 2180 struct vop_rmdir_args /* { 2181 struct vnode *a_dvp; 2182 struct vnode *a_vp; 2183 struct componentname *a_cnp; 2184 } */ *ap = v; 2185 struct vnode *vp = ap->a_vp; 2186 struct vnode *dvp = ap->a_dvp; 2187 struct componentname *cnp = ap->a_cnp; 2188 struct udf_node *dir_node = VTOI(dvp);; 2189 struct udf_node *udf_node = VTOI(vp); 2190 struct udf_mount *ump = dir_node->ump; 2191 int refcnt, error; 2192 2193 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2194 2195 /* don't allow '.' to be deleted */ 2196 if (dir_node == udf_node) { 2197 vrele(dvp); 2198 vput(vp); 2199 return EINVAL; 2200 } 2201 2202 /* check to see if the directory is empty */ 2203 error = 0; 2204 if (dir_node->fe) { 2205 refcnt = udf_rw16(udf_node->fe->link_cnt); 2206 } else { 2207 refcnt = udf_rw16(udf_node->efe->link_cnt); 2208 } 2209 if (refcnt > 1) { 2210 /* NOT empty */ 2211 vput(dvp); 2212 vput(vp); 2213 return ENOTEMPTY; 2214 } 2215 2216 /* detach the node from the directory */ 2217 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2218 if (error == 0) { 2219 cache_purge(vp); 2220 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2221 VN_KNOTE(vp, NOTE_DELETE); 2222 } 2223 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2224 2225 /* unput the nodes and exit */ 2226 vput(dvp); 2227 vput(vp); 2228 2229 return error; 2230 } 2231 2232 /* --------------------------------------------------------------------- */ 2233 2234 int 2235 udf_fsync(void *v) 2236 { 2237 struct vop_fsync_args /* { 2238 struct vnode *a_vp; 2239 kauth_cred_t a_cred; 2240 int a_flags; 2241 off_t offlo; 2242 off_t offhi; 2243 struct proc *a_p; 2244 } */ *ap = v; 2245 struct vnode *vp = ap->a_vp; 2246 struct udf_node *udf_node = VTOI(vp); 2247 int error, flags, wait; 2248 2249 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2250 udf_node, 2251 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2252 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2253 2254 /* flush data and wait for it when requested */ 2255 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2256 vflushbuf(vp, wait); 2257 2258 if (udf_node == NULL) { 2259 printf("udf_fsync() called on NULL udf_node!\n"); 2260 return 0; 2261 } 2262 if (vp->v_tag != VT_UDF) { 2263 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2264 return 0; 2265 } 2266 2267 /* set our times */ 2268 udf_itimes(udf_node, NULL, NULL, NULL); 2269 2270 /* if called when mounted readonly, never write back */ 2271 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2272 return 0; 2273 2274 /* if only data is requested, return */ 2275 if (ap->a_flags & FSYNC_DATAONLY) 2276 return 0; 2277 2278 /* check if the node is dirty 'enough'*/ 2279 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2280 if (flags == 0) 2281 return 0; 2282 2283 /* if we don't have to wait, check for IO pending */ 2284 if (!wait) { 2285 if (vp->v_numoutput > 0) { 2286 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2287 return 0; 2288 } 2289 if (udf_node->outstanding_bufs > 0) { 2290 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2291 return 0; 2292 } 2293 if (udf_node->outstanding_nodedscr > 0) { 2294 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2295 return 0; 2296 } 2297 } 2298 2299 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2300 if (wait) { 2301 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2302 mutex_enter(&vp->v_interlock); 2303 while (vp->v_numoutput) { 2304 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2305 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2306 } 2307 mutex_exit(&vp->v_interlock); 2308 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2309 } 2310 2311 /* write out node and wait for it if requested */ 2312 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2313 error = udf_writeout_node(udf_node, wait); 2314 if (error) 2315 return error; 2316 2317 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2318 2319 return 0; 2320 } 2321 2322 /* --------------------------------------------------------------------- */ 2323 2324 int 2325 udf_advlock(void *v) 2326 { 2327 struct vop_advlock_args /* { 2328 struct vnode *a_vp; 2329 void *a_id; 2330 int a_op; 2331 struct flock *a_fl; 2332 int a_flags; 2333 } */ *ap = v; 2334 struct vnode *vp = ap->a_vp; 2335 struct udf_node *udf_node = VTOI(vp); 2336 struct file_entry *fe; 2337 struct extfile_entry *efe; 2338 uint64_t file_size; 2339 2340 DPRINTF(LOCKING, ("udf_advlock called\n")); 2341 2342 /* get directory filesize */ 2343 if (udf_node->fe) { 2344 fe = udf_node->fe; 2345 file_size = udf_rw64(fe->inf_len); 2346 } else { 2347 assert(udf_node->efe); 2348 efe = udf_node->efe; 2349 file_size = udf_rw64(efe->inf_len); 2350 } 2351 2352 return lf_advlock(ap, &udf_node->lockf, file_size); 2353 } 2354 2355 /* --------------------------------------------------------------------- */ 2356 2357 /* Global vfs vnode data structures for udfs */ 2358 int (**udf_vnodeop_p)(void *); 2359 2360 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2361 { &vop_default_desc, vn_default_error }, 2362 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2363 { &vop_create_desc, udf_create }, /* create */ 2364 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2365 { &vop_open_desc, udf_open }, /* open */ 2366 { &vop_close_desc, udf_close }, /* close */ 2367 { &vop_access_desc, udf_access }, /* access */ 2368 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2369 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2370 { &vop_read_desc, udf_read }, /* read */ 2371 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2372 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2373 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2374 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2375 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2376 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2377 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2378 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2379 { &vop_seek_desc, genfs_seek }, /* seek */ 2380 { &vop_remove_desc, udf_remove }, /* remove */ 2381 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2382 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2383 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2384 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2385 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2386 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2387 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2388 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2389 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2390 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2391 { &vop_lock_desc, genfs_lock }, /* lock */ 2392 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2393 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2394 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2395 /* { &vop_print_desc, udf_print }, */ /* print */ 2396 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2397 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2398 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2399 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2400 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2401 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2402 { NULL, NULL } 2403 }; 2404 2405 2406 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2407 &udf_vnodeop_p, udf_vnodeop_entries 2408 }; 2409 2410
Indexes created Thu Oct 02 14:10:14 GMT 2025