udf_vnops.c revision 1.72.2.2
1 /* $NetBSD: udf_vnops.c,v 1.72.2.2 2013/06/23 06:18:28 tls Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Generic parts are derived from software contributed to The NetBSD Foundation 28 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 29 * 2005 program. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __KERNEL_RCSID(0, "$NetBSD: udf_vnops.c,v 1.72.2.2 2013/06/23 06:18:28 tls Exp $"); 36 #endif /* not lint */ 37 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 43 #include <sys/kernel.h> 44 #include <sys/file.h> /* define FWRITE ... */ 45 #include <sys/stat.h> 46 #include <sys/buf.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/lockf.h> 54 #include <sys/kauth.h> 55 56 #include <miscfs/genfs/genfs.h> 57 #include <uvm/uvm_extern.h> 58 59 #include <fs/udf/ecma167-udf.h> 60 #include <fs/udf/udf_mount.h> 61 #include "udf.h" 62 #include "udf_subr.h" 63 #include "udf_bswap.h" 64 65 66 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data) 67 68 69 /* externs */ 70 extern int prtactive; 71 72 /* implementations of vnode functions; table follows at end */ 73 /* --------------------------------------------------------------------- */ 74 75 int 76 udf_inactive(void *v) 77 { 78 struct vop_inactive_args /* { 79 struct vnode *a_vp; 80 bool *a_recycle; 81 } */ *ap = v; 82 struct vnode *vp = ap->a_vp; 83 struct udf_node *udf_node = VTOI(vp); 84 int refcnt; 85 86 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 87 88 if (udf_node == NULL) { 89 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 90 VOP_UNLOCK(vp); 91 return 0; 92 } 93 94 /* 95 * Optionally flush metadata to disc. If the file has not been 96 * referenced anymore in a directory we ought to free up the resources 97 * on disc if applicable. 98 */ 99 if (udf_node->fe) { 100 refcnt = udf_rw16(udf_node->fe->link_cnt); 101 } else { 102 assert(udf_node->efe); 103 refcnt = udf_rw16(udf_node->efe->link_cnt); 104 } 105 106 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 107 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 108 /* system nodes are not writen out on inactive, so flush */ 109 udf_node->i_flags = 0; 110 } 111 112 *ap->a_recycle = false; 113 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 114 /* remove this file's allocation */ 115 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 116 *ap->a_recycle = true; 117 udf_delete_node(udf_node); 118 VOP_UNLOCK(vp); 119 vrecycle(vp, NULL, curlwp); 120 return 0; 121 } 122 123 /* write out its node */ 124 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 125 udf_update(vp, NULL, NULL, NULL, 0); 126 VOP_UNLOCK(vp); 127 128 return 0; 129 } 130 131 /* --------------------------------------------------------------------- */ 132 133 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 134 135 int 136 udf_reclaim(void *v) 137 { 138 struct vop_reclaim_args /* { 139 struct vnode *a_vp; 140 } */ *ap = v; 141 struct vnode *vp = ap->a_vp; 142 struct udf_node *udf_node = VTOI(vp); 143 144 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 145 if (prtactive && vp->v_usecount > 1) 146 vprint("udf_reclaim(): pushing active", vp); 147 148 if (udf_node == NULL) { 149 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 150 return 0; 151 } 152 153 /* update note for closure */ 154 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 155 156 /* async check to see if all node descriptors are written out */ 157 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 158 vprint("udf_reclaim(): waiting for writeout\n", vp); 159 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 160 } 161 162 /* dispose all node knowledge */ 163 udf_dispose_node(udf_node); 164 165 return 0; 166 } 167 168 /* --------------------------------------------------------------------- */ 169 170 int 171 udf_read(void *v) 172 { 173 struct vop_read_args /* { 174 struct vnode *a_vp; 175 struct uio *a_uio; 176 int a_ioflag; 177 kauth_cred_t a_cred; 178 } */ *ap = v; 179 struct vnode *vp = ap->a_vp; 180 struct uio *uio = ap->a_uio; 181 int ioflag = ap->a_ioflag; 182 int advice = IO_ADV_DECODE(ap->a_ioflag); 183 struct uvm_object *uobj; 184 struct udf_node *udf_node = VTOI(vp); 185 struct file_entry *fe; 186 struct extfile_entry *efe; 187 uint64_t file_size; 188 vsize_t len; 189 int error; 190 191 /* 192 * XXX reading from extended attributes not yet implemented. FreeBSD 193 * has it in mind to forward the IO_EXT read call to the 194 * VOP_READEXTATTR(). 195 */ 196 197 DPRINTF(READ, ("udf_read called\n")); 198 199 /* can this happen? some filingsystems have this check */ 200 if (uio->uio_offset < 0) 201 return EINVAL; 202 if (uio->uio_resid == 0) 203 return 0; 204 205 /* protect against rogue programs reading raw directories and links */ 206 if ((ioflag & IO_ALTSEMANTICS) == 0) { 207 if (vp->v_type == VDIR) 208 return EISDIR; 209 /* all but regular files just give EINVAL */ 210 if (vp->v_type != VREG) 211 return EINVAL; 212 } 213 214 assert(udf_node); 215 assert(udf_node->fe || udf_node->efe); 216 217 /* get file/directory filesize */ 218 if (udf_node->fe) { 219 fe = udf_node->fe; 220 file_size = udf_rw64(fe->inf_len); 221 } else { 222 assert(udf_node->efe); 223 efe = udf_node->efe; 224 file_size = udf_rw64(efe->inf_len); 225 } 226 227 /* read contents using buffercache */ 228 uobj = &vp->v_uobj; 229 error = 0; 230 while (uio->uio_resid > 0) { 231 /* reached end? */ 232 if (file_size <= uio->uio_offset) 233 break; 234 235 /* maximise length to file extremity */ 236 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 237 if (len == 0) 238 break; 239 240 /* ubc, here we come, prepare to trap */ 241 error = ubc_uiomove(uobj, uio, len, advice, 242 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 243 if (error) 244 break; 245 } 246 247 /* note access time unless not requested */ 248 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 249 udf_node->i_flags |= IN_ACCESS; 250 if ((ioflag & IO_SYNC) == IO_SYNC) 251 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 252 } 253 254 return error; 255 } 256 257 /* --------------------------------------------------------------------- */ 258 259 int 260 udf_write(void *v) 261 { 262 struct vop_write_args /* { 263 struct vnode *a_vp; 264 struct uio *a_uio; 265 int a_ioflag; 266 kauth_cred_t a_cred; 267 } */ *ap = v; 268 struct vnode *vp = ap->a_vp; 269 struct uio *uio = ap->a_uio; 270 int ioflag = ap->a_ioflag; 271 kauth_cred_t cred = ap->a_cred; 272 int advice = IO_ADV_DECODE(ap->a_ioflag); 273 struct uvm_object *uobj; 274 struct udf_node *udf_node = VTOI(vp); 275 struct file_entry *fe; 276 struct extfile_entry *efe; 277 uint64_t file_size, old_size, old_offset; 278 vsize_t len; 279 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 280 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 281 int error; 282 int resid, extended; 283 284 /* 285 * XXX writing to extended attributes not yet implemented. FreeBSD has 286 * it in mind to forward the IO_EXT read call to the 287 * VOP_READEXTATTR(). 288 */ 289 290 DPRINTF(WRITE, ("udf_write called\n")); 291 292 /* can this happen? some filingsystems have this check */ 293 if (uio->uio_offset < 0) 294 return EINVAL; 295 if (uio->uio_resid == 0) 296 return 0; 297 298 /* protect against rogue programs writing raw directories or links */ 299 if ((ioflag & IO_ALTSEMANTICS) == 0) { 300 if (vp->v_type == VDIR) 301 return EISDIR; 302 /* all but regular files just give EINVAL for now */ 303 if (vp->v_type != VREG) 304 return EINVAL; 305 } 306 307 assert(udf_node); 308 assert(udf_node->fe || udf_node->efe); 309 310 /* get file/directory filesize */ 311 if (udf_node->fe) { 312 fe = udf_node->fe; 313 file_size = udf_rw64(fe->inf_len); 314 } else { 315 assert(udf_node->efe); 316 efe = udf_node->efe; 317 file_size = udf_rw64(efe->inf_len); 318 } 319 old_size = file_size; 320 321 /* if explicitly asked to append, uio_offset can be wrong? */ 322 if (ioflag & IO_APPEND) 323 uio->uio_offset = file_size; 324 325 extended = (uio->uio_offset + uio->uio_resid > file_size); 326 if (extended) { 327 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 328 file_size, uio->uio_offset + uio->uio_resid)); 329 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 330 if (error) 331 return error; 332 file_size = uio->uio_offset + uio->uio_resid; 333 } 334 335 /* write contents using buffercache */ 336 uobj = &vp->v_uobj; 337 resid = uio->uio_resid; 338 error = 0; 339 340 uvm_vnp_setwritesize(vp, file_size); 341 old_offset = uio->uio_offset; 342 while (uio->uio_resid > 0) { 343 /* maximise length to file extremity */ 344 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 345 if (len == 0) 346 break; 347 348 genfs_node_wrlock(vp); 349 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 350 genfs_node_unlock(vp); 351 if (error) 352 break; 353 354 /* ubc, here we come, prepare to trap */ 355 error = ubc_uiomove(uobj, uio, len, advice, 356 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 357 if (error) 358 break; 359 360 /* 361 * flush what we just wrote if necessary. 362 * XXXUBC simplistic async flushing. 363 * 364 * Directories are excluded since its file data that we want 365 * to purge. 366 */ 367 if (!async && (vp->v_type != VDIR) && 368 (old_offset >> 16 != uio->uio_offset >> 16)) { 369 mutex_enter(vp->v_interlock); 370 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 371 (uio->uio_offset >> 16) << 16, 372 PGO_CLEANIT | PGO_LAZY); 373 old_offset = uio->uio_offset; 374 } 375 } 376 uvm_vnp_setsize(vp, file_size); 377 378 /* mark node changed and request update */ 379 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 380 if (vp->v_mount->mnt_flag & MNT_RELATIME) 381 udf_node->i_flags |= IN_ACCESS; 382 383 /* 384 * XXX TODO FFS has code here to reset setuid & setgid when we're not 385 * the superuser as a precaution against tampering. 386 */ 387 388 /* if we wrote a thing, note write action on vnode */ 389 if (resid > uio->uio_resid) 390 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 391 392 if (error) { 393 /* bring back file size to its former size */ 394 /* take notice of its errors? */ 395 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 396 397 /* roll back uio */ 398 uio->uio_offset -= resid - uio->uio_resid; 399 uio->uio_resid = resid; 400 } else { 401 /* if we write and we're synchronous, update node */ 402 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 403 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 404 } 405 406 return error; 407 } 408 409 410 /* --------------------------------------------------------------------- */ 411 412 /* 413 * `Special' bmap functionality that translates all incomming requests to 414 * translate to vop_strategy() calls with the same blocknumbers effectively 415 * not translating at all. 416 */ 417 418 int 419 udf_trivial_bmap(void *v) 420 { 421 struct vop_bmap_args /* { 422 struct vnode *a_vp; 423 daddr_t a_bn; 424 struct vnode **a_vpp; 425 daddr_t *a_bnp; 426 int *a_runp; 427 } */ *ap = v; 428 struct vnode *vp = ap->a_vp; /* our node */ 429 struct vnode **vpp = ap->a_vpp; /* return node */ 430 daddr_t *bnp = ap->a_bnp; /* translated */ 431 daddr_t bn = ap->a_bn; /* origional */ 432 int *runp = ap->a_runp; 433 struct udf_node *udf_node = VTOI(vp); 434 uint32_t lb_size; 435 436 /* get logical block size */ 437 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 438 439 /* could return `-1' to indicate holes/zeros */ 440 /* translate 1:1 */ 441 *bnp = bn; 442 443 /* set the vnode to read the data from with strategy on itself */ 444 if (vpp) 445 *vpp = vp; 446 447 /* set runlength of maximum block size */ 448 if (runp) 449 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 450 451 /* return success */ 452 return 0; 453 } 454 455 /* --------------------------------------------------------------------- */ 456 457 int 458 udf_vfsstrategy(void *v) 459 { 460 struct vop_strategy_args /* { 461 struct vnode *a_vp; 462 struct buf *a_bp; 463 } */ *ap = v; 464 struct vnode *vp = ap->a_vp; 465 struct buf *bp = ap->a_bp; 466 struct udf_node *udf_node = VTOI(vp); 467 uint32_t lb_size, from, sectors; 468 int error; 469 470 DPRINTF(STRATEGY, ("udf_strategy called\n")); 471 472 /* check if we ought to be here */ 473 if (vp->v_type == VBLK || vp->v_type == VCHR) 474 panic("udf_strategy: spec"); 475 476 /* only filebuffers ought to be read/write by this, no descriptors */ 477 assert(bp->b_blkno >= 0); 478 479 /* get sector size */ 480 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 481 482 /* calculate sector to start from */ 483 from = bp->b_blkno; 484 485 /* calculate length to fetch/store in sectors */ 486 sectors = bp->b_bcount / lb_size; 487 assert(bp->b_bcount > 0); 488 489 /* NEVER assume later that this buffer is already translated */ 490 /* bp->b_lblkno = bp->b_blkno; */ 491 492 /* check assertions: we OUGHT to always get multiples of this */ 493 assert(sectors * lb_size == bp->b_bcount); 494 495 /* issue buffer */ 496 error = 0; 497 if (bp->b_flags & B_READ) { 498 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 499 ", sector %d for %d sectors\n", 500 vp, bp, bp->b_blkno, from, sectors)); 501 502 /* read buffer from the udf_node, translate vtop on the way*/ 503 udf_read_filebuf(udf_node, bp); 504 } else { 505 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 506 ", sector %d for %d sectors\n", 507 vp, bp, bp->b_blkno, from, sectors)); 508 509 /* write buffer to the udf_node, translate vtop on the way*/ 510 udf_write_filebuf(udf_node, bp); 511 } 512 513 return bp->b_error; 514 } 515 516 /* --------------------------------------------------------------------- */ 517 518 int 519 udf_readdir(void *v) 520 { 521 struct vop_readdir_args /* { 522 struct vnode *a_vp; 523 struct uio *a_uio; 524 kauth_cred_t a_cred; 525 int *a_eofflag; 526 off_t **a_cookies; 527 int *a_ncookies; 528 } */ *ap = v; 529 struct uio *uio = ap->a_uio; 530 struct vnode *vp = ap->a_vp; 531 struct udf_node *udf_node = VTOI(vp); 532 struct file_entry *fe; 533 struct extfile_entry *efe; 534 struct fileid_desc *fid; 535 struct dirent *dirent; 536 uint64_t file_size, diroffset, transoffset; 537 uint32_t lb_size; 538 int error; 539 540 DPRINTF(READDIR, ("udf_readdir called\n")); 541 542 /* This operation only makes sense on directory nodes. */ 543 if (vp->v_type != VDIR) 544 return ENOTDIR; 545 546 /* get directory filesize */ 547 if (udf_node->fe) { 548 fe = udf_node->fe; 549 file_size = udf_rw64(fe->inf_len); 550 } else { 551 assert(udf_node->efe); 552 efe = udf_node->efe; 553 file_size = udf_rw64(efe->inf_len); 554 } 555 556 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 557 558 /* 559 * Add `.' pseudo entry if at offset zero since its not in the fid 560 * stream 561 */ 562 if (uio->uio_offset == 0) { 563 DPRINTF(READDIR, ("\t'.' inserted\n")); 564 strcpy(dirent->d_name, "."); 565 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 566 dirent->d_type = DT_DIR; 567 dirent->d_namlen = strlen(dirent->d_name); 568 dirent->d_reclen = _DIRENT_SIZE(dirent); 569 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 570 571 /* mark with magic value that we have done the dummy */ 572 uio->uio_offset = UDF_DIRCOOKIE_DOT; 573 } 574 575 /* we are called just as long as we keep on pushing data in */ 576 error = 0; 577 if (uio->uio_offset < file_size) { 578 /* allocate temporary space for fid */ 579 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 580 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 581 582 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 583 uio->uio_offset = 0; 584 585 diroffset = uio->uio_offset; 586 transoffset = diroffset; 587 while (diroffset < file_size) { 588 DPRINTF(READDIR, ("\tread in fid stream\n")); 589 /* transfer a new fid/dirent */ 590 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 591 DPRINTFIF(READDIR, error, ("read error in read fid " 592 "stream : %d\n", error)); 593 if (error) 594 break; 595 596 /* 597 * If there isn't enough space in the uio to return a 598 * whole dirent, break off read 599 */ 600 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 601 break; 602 603 /* remember the last entry we transfered */ 604 transoffset = diroffset; 605 606 /* skip deleted entries */ 607 if (fid->file_char & UDF_FILE_CHAR_DEL) 608 continue; 609 610 /* skip not visible files */ 611 if (fid->file_char & UDF_FILE_CHAR_VIS) 612 continue; 613 614 /* copy dirent to the caller */ 615 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 616 dirent->d_name, dirent->d_type)); 617 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 618 } 619 620 /* pass on last transfered offset */ 621 uio->uio_offset = transoffset; 622 free(fid, M_UDFTEMP); 623 } 624 625 if (ap->a_eofflag) 626 *ap->a_eofflag = (uio->uio_offset >= file_size); 627 628 #ifdef DEBUG 629 if (udf_verbose & UDF_DEBUG_READDIR) { 630 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 631 if (ap->a_eofflag) 632 printf("returning EOF ? %d\n", *ap->a_eofflag); 633 if (error) 634 printf("readdir returning error %d\n", error); 635 } 636 #endif 637 638 free(dirent, M_UDFTEMP); 639 return error; 640 } 641 642 /* --------------------------------------------------------------------- */ 643 644 int 645 udf_lookup(void *v) 646 { 647 struct vop_lookup_args /* { 648 struct vnode *a_dvp; 649 struct vnode **a_vpp; 650 struct componentname *a_cnp; 651 } */ *ap = v; 652 struct vnode *dvp = ap->a_dvp; 653 struct vnode **vpp = ap->a_vpp; 654 struct componentname *cnp = ap->a_cnp; 655 struct udf_node *dir_node, *res_node; 656 struct udf_mount *ump; 657 struct long_ad icb_loc; 658 const char *name; 659 int namelen, nameiop, islastcn, mounted_ro; 660 int vnodetp; 661 int error, found; 662 663 dir_node = VTOI(dvp); 664 ump = dir_node->ump; 665 *vpp = NULL; 666 667 DPRINTF(LOOKUP, ("udf_lookup called\n")); 668 669 /* simplify/clarification flags */ 670 nameiop = cnp->cn_nameiop; 671 islastcn = cnp->cn_flags & ISLASTCN; 672 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 673 674 /* check exec/dirread permissions first */ 675 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 676 if (error) 677 return error; 678 679 DPRINTF(LOOKUP, ("\taccess ok\n")); 680 681 /* 682 * If requesting a modify on the last path element on a read-only 683 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 684 */ 685 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 686 return EROFS; 687 688 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 689 cnp->cn_nameptr)); 690 /* look in the namecache */ 691 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 692 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 693 return *vpp == NULLVP ? ENOENT : 0; 694 } 695 696 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 697 698 /* 699 * Obviously, the file is not (anymore) in the namecache, we have to 700 * search for it. There are three basic cases: '.', '..' and others. 701 * 702 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 703 */ 704 error = 0; 705 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 706 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 707 /* special case 1 '.' */ 708 vref(dvp); 709 *vpp = dvp; 710 /* done */ 711 } else if (cnp->cn_flags & ISDOTDOT) { 712 /* special case 2 '..' */ 713 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 714 715 /* get our node */ 716 name = ".."; 717 namelen = 2; 718 error = udf_lookup_name_in_dir(dvp, name, namelen, 719 &icb_loc, &found); 720 if (error) 721 goto out; 722 if (!found) 723 error = ENOENT; 724 725 /* first unlock parent */ 726 VOP_UNLOCK(dvp); 727 728 if (error == 0) { 729 DPRINTF(LOOKUP, ("\tfound '..'\n")); 730 /* try to create/reuse the node */ 731 error = udf_get_node(ump, &icb_loc, &res_node); 732 733 if (!error) { 734 DPRINTF(LOOKUP, 735 ("\tnode retrieved/created OK\n")); 736 *vpp = res_node->vnode; 737 } 738 } 739 740 /* try to relock parent */ 741 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 742 } else { 743 DPRINTF(LOOKUP, ("\tlookup file\n")); 744 /* all other files */ 745 /* lookup filename in the directory; location icb_loc */ 746 name = cnp->cn_nameptr; 747 namelen = cnp->cn_namelen; 748 error = udf_lookup_name_in_dir(dvp, name, namelen, 749 &icb_loc, &found); 750 if (error) 751 goto out; 752 if (!found) { 753 DPRINTF(LOOKUP, ("\tNOT found\n")); 754 /* 755 * UGH, didn't find name. If we're creating or 756 * renaming on the last name this is OK and we ought 757 * to return EJUSTRETURN if its allowed to be created. 758 */ 759 error = ENOENT; 760 if (islastcn && 761 (nameiop == CREATE || nameiop == RENAME)) 762 error = 0; 763 if (!error) { 764 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 765 if (!error) { 766 error = EJUSTRETURN; 767 } 768 } 769 /* done */ 770 } else { 771 /* try to create/reuse the node */ 772 error = udf_get_node(ump, &icb_loc, &res_node); 773 if (!error) { 774 /* 775 * If we are not at the last path component 776 * and found a non-directory or non-link entry 777 * (which may itself be pointing to a 778 * directory), raise an error. 779 */ 780 vnodetp = res_node->vnode->v_type; 781 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 782 if (!islastcn) 783 error = ENOTDIR; 784 } 785 786 } 787 if (!error) { 788 *vpp = res_node->vnode; 789 } 790 } 791 } 792 793 out: 794 /* 795 * Store result in the cache if requested. If we are creating a file, 796 * the file might not be found and thus putting it into the namecache 797 * might be seen as negative caching. 798 */ 799 if (nameiop != CREATE) 800 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 801 cnp->cn_flags); 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 = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 977 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 978 if (error) 979 return (error); 980 981 /* change the ownership */ 982 udf_setownership(udf_node, new_uid, new_gid); 983 984 /* mark node changed */ 985 udf_node->i_flags |= IN_CHANGE; 986 if (vp->v_mount->mnt_flag & MNT_RELATIME) 987 udf_node->i_flags |= IN_ACCESS; 988 989 return 0; 990 } 991 992 993 static int 994 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 995 { 996 struct udf_node *udf_node = VTOI(vp); 997 uid_t uid; 998 gid_t gid; 999 int error; 1000 1001 #ifdef notyet 1002 /* TODO get vaflags from the extended attributes? */ 1003 /* Immutable or append-only files cannot be modified, either. */ 1004 if (udf_node->flags & (IMMUTABLE | APPEND)) 1005 return EPERM; 1006 #endif 1007 1008 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1009 return EROFS; 1010 1011 /* retrieve uid/gid values */ 1012 udf_getownership(udf_node, &uid, &gid); 1013 1014 /* check permissions */ 1015 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1016 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1017 if (error) 1018 return (error); 1019 1020 /* change mode */ 1021 udf_setaccessmode(udf_node, mode); 1022 1023 /* mark node changed */ 1024 udf_node->i_flags |= IN_CHANGE; 1025 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1026 udf_node->i_flags |= IN_ACCESS; 1027 1028 return 0; 1029 } 1030 1031 1032 /* exported */ 1033 int 1034 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1035 { 1036 struct udf_node *udf_node = VTOI(vp); 1037 int error, extended; 1038 1039 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1040 return EROFS; 1041 1042 /* Decide whether this is a valid operation based on the file type. */ 1043 switch (vp->v_type) { 1044 case VDIR: 1045 return EISDIR; 1046 case VREG: 1047 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1048 return EROFS; 1049 break; 1050 case VBLK: 1051 /* FALLTHROUGH */ 1052 case VCHR: 1053 /* FALLTHROUGH */ 1054 case VFIFO: 1055 /* Allow modifications of special files even if in the file 1056 * system is mounted read-only (we are not modifying the 1057 * files themselves, but the objects they represent). */ 1058 return 0; 1059 default: 1060 /* Anything else is unsupported. */ 1061 return EOPNOTSUPP; 1062 } 1063 1064 #if notyet 1065 /* TODO get vaflags from the extended attributes? */ 1066 /* Immutable or append-only files cannot be modified, either. */ 1067 if (node->flags & (IMMUTABLE | APPEND)) 1068 return EPERM; 1069 #endif 1070 1071 /* resize file to the requested size */ 1072 error = udf_resize_node(udf_node, newsize, &extended); 1073 1074 if (error == 0) { 1075 /* mark change */ 1076 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1077 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1078 udf_node->i_flags |= IN_ACCESS; 1079 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1080 udf_update(vp, NULL, NULL, NULL, 0); 1081 } 1082 1083 return error; 1084 } 1085 1086 1087 static int 1088 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1089 { 1090 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1091 return EROFS; 1092 1093 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1094 1095 return 0; 1096 } 1097 1098 1099 static int 1100 udf_chtimes(struct vnode *vp, 1101 struct timespec *atime, struct timespec *mtime, 1102 struct timespec *birthtime, int setattrflags, 1103 kauth_cred_t cred) 1104 { 1105 struct udf_node *udf_node = VTOI(vp); 1106 uid_t uid; 1107 gid_t gid; 1108 int error; 1109 1110 #ifdef notyet 1111 /* TODO get vaflags from the extended attributes? */ 1112 /* Immutable or append-only files cannot be modified, either. */ 1113 if (udf_node->flags & (IMMUTABLE | APPEND)) 1114 return EPERM; 1115 #endif 1116 1117 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1118 return EROFS; 1119 1120 /* retrieve uid/gid values */ 1121 udf_getownership(udf_node, &uid, &gid); 1122 1123 /* check permissions */ 1124 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1125 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1126 if (error) 1127 return (error); 1128 1129 /* update node flags depending on what times are passed */ 1130 if (atime->tv_sec != VNOVAL) 1131 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1132 udf_node->i_flags |= IN_ACCESS; 1133 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1134 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1135 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1136 udf_node->i_flags |= IN_ACCESS; 1137 } 1138 1139 return udf_update(vp, atime, mtime, birthtime, 0); 1140 } 1141 1142 1143 int 1144 udf_setattr(void *v) 1145 { 1146 struct vop_setattr_args /* { 1147 struct vnode *a_vp; 1148 struct vattr *a_vap; 1149 kauth_cred_t a_cred; 1150 struct lwp *a_l; 1151 } */ *ap = v; 1152 struct vnode *vp = ap->a_vp; 1153 /* struct udf_node *udf_node = VTOI(vp); */ 1154 /* struct udf_mount *ump = udf_node->ump; */ 1155 kauth_cred_t cred = ap->a_cred; 1156 struct vattr *vap = ap->a_vap; 1157 int error; 1158 1159 DPRINTF(CALL, ("udf_setattr called\n")); 1160 1161 /* Abort if any unsettable attribute is given. */ 1162 error = 0; 1163 if (vap->va_type != VNON || 1164 vap->va_nlink != VNOVAL || 1165 vap->va_fsid != VNOVAL || 1166 vap->va_fileid != VNOVAL || 1167 vap->va_blocksize != VNOVAL || 1168 #ifdef notyet 1169 /* checks are debated */ 1170 vap->va_ctime.tv_sec != VNOVAL || 1171 vap->va_ctime.tv_nsec != VNOVAL || 1172 vap->va_birthtime.tv_sec != VNOVAL || 1173 vap->va_birthtime.tv_nsec != VNOVAL || 1174 #endif 1175 vap->va_gen != VNOVAL || 1176 vap->va_rdev != VNOVAL || 1177 vap->va_bytes != VNOVAL) 1178 error = EINVAL; 1179 1180 DPRINTF(ATTR, ("setattr changing:\n")); 1181 if (error == 0 && (vap->va_flags != VNOVAL)) { 1182 DPRINTF(ATTR, ("\tchflags\n")); 1183 error = udf_chflags(vp, vap->va_flags, cred); 1184 } 1185 1186 if (error == 0 && (vap->va_size != VNOVAL)) { 1187 DPRINTF(ATTR, ("\tchsize\n")); 1188 error = udf_chsize(vp, vap->va_size, cred); 1189 } 1190 1191 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1192 DPRINTF(ATTR, ("\tchown\n")); 1193 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1194 } 1195 1196 if (error == 0 && (vap->va_mode != VNOVAL)) { 1197 DPRINTF(ATTR, ("\tchmod\n")); 1198 error = udf_chmod(vp, vap->va_mode, cred); 1199 } 1200 1201 if (error == 0 && 1202 ((vap->va_atime.tv_sec != VNOVAL && 1203 vap->va_atime.tv_nsec != VNOVAL) || 1204 (vap->va_mtime.tv_sec != VNOVAL && 1205 vap->va_mtime.tv_nsec != VNOVAL)) 1206 ) { 1207 DPRINTF(ATTR, ("\tchtimes\n")); 1208 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1209 &vap->va_birthtime, vap->va_vaflags, cred); 1210 } 1211 VN_KNOTE(vp, NOTE_ATTRIB); 1212 1213 return error; 1214 } 1215 1216 /* --------------------------------------------------------------------- */ 1217 1218 /* 1219 * Return POSIX pathconf information for UDF file systems. 1220 */ 1221 int 1222 udf_pathconf(void *v) 1223 { 1224 struct vop_pathconf_args /* { 1225 struct vnode *a_vp; 1226 int a_name; 1227 register_t *a_retval; 1228 } */ *ap = v; 1229 uint32_t bits; 1230 1231 DPRINTF(CALL, ("udf_pathconf called\n")); 1232 1233 switch (ap->a_name) { 1234 case _PC_LINK_MAX: 1235 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1236 return 0; 1237 case _PC_NAME_MAX: 1238 *ap->a_retval = UDF_MAXNAMLEN; 1239 return 0; 1240 case _PC_PATH_MAX: 1241 *ap->a_retval = PATH_MAX; 1242 return 0; 1243 case _PC_PIPE_BUF: 1244 *ap->a_retval = PIPE_BUF; 1245 return 0; 1246 case _PC_CHOWN_RESTRICTED: 1247 *ap->a_retval = 1; 1248 return 0; 1249 case _PC_NO_TRUNC: 1250 *ap->a_retval = 1; 1251 return 0; 1252 case _PC_SYNC_IO: 1253 *ap->a_retval = 0; /* synchronised is off for performance */ 1254 return 0; 1255 case _PC_FILESIZEBITS: 1256 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1257 bits = 64; /* XXX ought to deliver 65 */ 1258 #if 0 1259 if (udf_node) 1260 bits = 64 * vp->v_mount->mnt_dev_bshift; 1261 #endif 1262 *ap->a_retval = bits; 1263 return 0; 1264 } 1265 1266 return EINVAL; 1267 } 1268 1269 1270 /* --------------------------------------------------------------------- */ 1271 1272 int 1273 udf_open(void *v) 1274 { 1275 struct vop_open_args /* { 1276 struct vnode *a_vp; 1277 int a_mode; 1278 kauth_cred_t a_cred; 1279 struct proc *a_p; 1280 } */ *ap = v; 1281 int flags; 1282 1283 DPRINTF(CALL, ("udf_open called\n")); 1284 1285 /* 1286 * Files marked append-only must be opened for appending. 1287 * TODO: get chflags(2) flags from extened attribute. 1288 */ 1289 flags = 0; 1290 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1291 return (EPERM); 1292 1293 return 0; 1294 } 1295 1296 1297 /* --------------------------------------------------------------------- */ 1298 1299 int 1300 udf_close(void *v) 1301 { 1302 struct vop_close_args /* { 1303 struct vnode *a_vp; 1304 int a_fflag; 1305 kauth_cred_t a_cred; 1306 struct proc *a_p; 1307 } */ *ap = v; 1308 struct vnode *vp = ap->a_vp; 1309 struct udf_node *udf_node = VTOI(vp); 1310 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1311 int error; 1312 1313 DPRINTF(CALL, ("udf_close called\n")); 1314 udf_node = udf_node; /* shut up gcc */ 1315 1316 if (!async && (vp->v_type != VDIR)) { 1317 mutex_enter(vp->v_interlock); 1318 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1319 if (error) 1320 return error; 1321 } 1322 1323 mutex_enter(vp->v_interlock); 1324 if (vp->v_usecount > 1) 1325 udf_itimes(udf_node, NULL, NULL, NULL); 1326 mutex_exit(vp->v_interlock); 1327 1328 return 0; 1329 } 1330 1331 1332 /* --------------------------------------------------------------------- */ 1333 1334 static int 1335 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1336 { 1337 int flags; 1338 1339 /* check if we are allowed to write */ 1340 switch (vap->va_type) { 1341 case VDIR: 1342 case VLNK: 1343 case VREG: 1344 /* 1345 * normal nodes: check if we're on a read-only mounted 1346 * filingsystem and bomb out if we're trying to write. 1347 */ 1348 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1349 return EROFS; 1350 break; 1351 case VBLK: 1352 case VCHR: 1353 case VSOCK: 1354 case VFIFO: 1355 /* 1356 * special nodes: even on read-only mounted filingsystems 1357 * these are allowed to be written to if permissions allow. 1358 */ 1359 break; 1360 default: 1361 /* no idea what this is */ 1362 return EINVAL; 1363 } 1364 1365 /* noone may write immutable files */ 1366 /* TODO: get chflags(2) flags from extened attribute. */ 1367 flags = 0; 1368 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1369 return EPERM; 1370 1371 return 0; 1372 } 1373 1374 static int 1375 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1376 kauth_cred_t cred) 1377 { 1378 1379 /* ask the generic genfs_can_access to advice on security */ 1380 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1381 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1382 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1383 } 1384 1385 int 1386 udf_access(void *v) 1387 { 1388 struct vop_access_args /* { 1389 struct vnode *a_vp; 1390 int a_mode; 1391 kauth_cred_t a_cred; 1392 struct proc *a_p; 1393 } */ *ap = v; 1394 struct vnode *vp = ap->a_vp; 1395 mode_t mode = ap->a_mode; 1396 kauth_cred_t cred = ap->a_cred; 1397 /* struct udf_node *udf_node = VTOI(vp); */ 1398 struct vattr vap; 1399 int error; 1400 1401 DPRINTF(CALL, ("udf_access called\n")); 1402 1403 error = VOP_GETATTR(vp, &vap, NULL); 1404 if (error) 1405 return error; 1406 1407 error = udf_check_possible(vp, &vap, mode); 1408 if (error) 1409 return error; 1410 1411 error = udf_check_permitted(vp, &vap, mode, cred); 1412 1413 return error; 1414 } 1415 1416 /* --------------------------------------------------------------------- */ 1417 1418 int 1419 udf_create(void *v) 1420 { 1421 struct vop_create_args /* { 1422 struct vnode *a_dvp; 1423 struct vnode **a_vpp; 1424 struct componentname *a_cnp; 1425 struct vattr *a_vap; 1426 } */ *ap = v; 1427 struct vnode *dvp = ap->a_dvp; 1428 struct vnode **vpp = ap->a_vpp; 1429 struct vattr *vap = ap->a_vap; 1430 struct componentname *cnp = ap->a_cnp; 1431 int error; 1432 1433 DPRINTF(CALL, ("udf_create called\n")); 1434 error = udf_create_node(dvp, vpp, vap, cnp); 1435 1436 vput(dvp); 1437 return error; 1438 } 1439 1440 /* --------------------------------------------------------------------- */ 1441 1442 int 1443 udf_mknod(void *v) 1444 { 1445 struct vop_mknod_args /* { 1446 struct vnode *a_dvp; 1447 struct vnode **a_vpp; 1448 struct componentname *a_cnp; 1449 struct vattr *a_vap; 1450 } */ *ap = v; 1451 struct vnode *dvp = ap->a_dvp; 1452 struct vnode **vpp = ap->a_vpp; 1453 struct vattr *vap = ap->a_vap; 1454 struct componentname *cnp = ap->a_cnp; 1455 int error; 1456 1457 DPRINTF(CALL, ("udf_mknod called\n")); 1458 error = udf_create_node(dvp, vpp, vap, cnp); 1459 1460 vput(dvp); 1461 return error; 1462 } 1463 1464 /* --------------------------------------------------------------------- */ 1465 1466 int 1467 udf_mkdir(void *v) 1468 { 1469 struct vop_mkdir_args /* { 1470 struct vnode *a_dvp; 1471 struct vnode **a_vpp; 1472 struct componentname *a_cnp; 1473 struct vattr *a_vap; 1474 } */ *ap = v; 1475 struct vnode *dvp = ap->a_dvp; 1476 struct vnode **vpp = ap->a_vpp; 1477 struct vattr *vap = ap->a_vap; 1478 struct componentname *cnp = ap->a_cnp; 1479 int error; 1480 1481 DPRINTF(CALL, ("udf_mkdir called\n")); 1482 error = udf_create_node(dvp, vpp, vap, cnp); 1483 1484 vput(dvp); 1485 return error; 1486 } 1487 1488 /* --------------------------------------------------------------------- */ 1489 1490 static int 1491 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1492 { 1493 struct udf_node *udf_node, *dir_node; 1494 struct vattr vap; 1495 int error; 1496 1497 DPRINTF(CALL, ("udf_link called\n")); 1498 KASSERT(dvp != vp); 1499 KASSERT(vp->v_type != VDIR); 1500 KASSERT(dvp->v_mount == vp->v_mount); 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 vput(dvp); 1703 return error; 1704 } 1705 1706 /* --------------------------------------------------------------------- */ 1707 1708 int 1709 udf_readlink(void *v) 1710 { 1711 struct vop_readlink_args /* { 1712 struct vnode *a_vp; 1713 struct uio *a_uio; 1714 kauth_cred_t a_cred; 1715 } */ *ap = v; 1716 struct vnode *vp = ap->a_vp; 1717 struct uio *uio = ap->a_uio; 1718 kauth_cred_t cred = ap->a_cred; 1719 struct udf_node *udf_node; 1720 struct pathcomp pathcomp; 1721 struct vattr vattr; 1722 uint8_t *pathbuf, *targetbuf, *tmpname; 1723 uint8_t *pathpos, *targetpos; 1724 char *mntonname; 1725 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1726 int first, error; 1727 1728 DPRINTF(CALL, ("udf_readlink called\n")); 1729 1730 udf_node = VTOI(vp); 1731 error = VOP_GETATTR(vp, &vattr, cred); 1732 if (error) 1733 return error; 1734 1735 /* claim temporary buffers for translation */ 1736 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1737 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1738 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1739 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1740 memset(targetbuf, 0, PATH_MAX); 1741 1742 /* read contents of file in our temporary buffer */ 1743 error = vn_rdwr(UIO_READ, udf_node->vnode, 1744 pathbuf, vattr.va_size, 0, 1745 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1746 FSCRED, NULL, NULL); 1747 if (error) { 1748 /* failed to read in symlink contents */ 1749 free(pathbuf, M_UDFTEMP); 1750 free(targetbuf, M_UDFTEMP); 1751 free(tmpname, M_UDFTEMP); 1752 return error; 1753 } 1754 1755 /* convert to a unix path */ 1756 pathpos = pathbuf; 1757 pathlen = 0; 1758 targetpos = targetbuf; 1759 targetlen = PATH_MAX; 1760 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1761 mntonnamelen = strlen(mntonname); 1762 1763 error = 0; 1764 first = 1; 1765 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1766 len = UDF_PATH_COMP_SIZE; 1767 memcpy(&pathcomp, pathpos, len); 1768 l_ci = pathcomp.l_ci; 1769 switch (pathcomp.type) { 1770 case UDF_PATH_COMP_ROOT : 1771 /* XXX should check for l_ci; bugcompatible now */ 1772 if ((targetlen < 1) || !first) { 1773 error = EINVAL; 1774 break; 1775 } 1776 *targetpos++ = '/'; targetlen--; 1777 break; 1778 case UDF_PATH_COMP_MOUNTROOT : 1779 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1780 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1781 error = EINVAL; 1782 break; 1783 } 1784 memcpy(targetpos, mntonname, mntonnamelen); 1785 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1786 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1787 /* more follows, so must be directory */ 1788 *targetpos++ = '/'; targetlen--; 1789 } 1790 break; 1791 case UDF_PATH_COMP_PARENTDIR : 1792 /* XXX should check for l_ci; bugcompatible now */ 1793 if (targetlen < 3) { 1794 error = EINVAL; 1795 break; 1796 } 1797 *targetpos++ = '.'; targetlen--; 1798 *targetpos++ = '.'; targetlen--; 1799 *targetpos++ = '/'; targetlen--; 1800 break; 1801 case UDF_PATH_COMP_CURDIR : 1802 /* XXX should check for l_ci; bugcompatible now */ 1803 if (targetlen < 2) { 1804 error = EINVAL; 1805 break; 1806 } 1807 *targetpos++ = '.'; targetlen--; 1808 *targetpos++ = '/'; targetlen--; 1809 break; 1810 case UDF_PATH_COMP_NAME : 1811 if (l_ci == 0) { 1812 error = EINVAL; 1813 break; 1814 } 1815 memset(tmpname, 0, PATH_MAX); 1816 memcpy(&pathcomp, pathpos, len + l_ci); 1817 udf_to_unix_name(tmpname, MAXPATHLEN, 1818 pathcomp.ident, l_ci, 1819 &udf_node->ump->logical_vol->desc_charset); 1820 namelen = strlen(tmpname); 1821 if (targetlen < namelen + 1) { 1822 error = EINVAL; 1823 break; 1824 } 1825 memcpy(targetpos, tmpname, namelen); 1826 targetpos += namelen; targetlen -= namelen; 1827 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1828 /* more follows, so must be directory */ 1829 *targetpos++ = '/'; targetlen--; 1830 } 1831 break; 1832 default : 1833 error = EINVAL; 1834 break; 1835 } 1836 first = 0; 1837 if (error) 1838 break; 1839 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1840 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1841 1842 } 1843 /* all processed? */ 1844 if (vattr.va_size - pathlen > 0) 1845 error = EINVAL; 1846 1847 /* uiomove() to destination */ 1848 if (!error) 1849 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1850 1851 free(pathbuf, M_UDFTEMP); 1852 free(targetbuf, M_UDFTEMP); 1853 free(tmpname, M_UDFTEMP); 1854 1855 return error; 1856 } 1857 1858 /* --------------------------------------------------------------------- */ 1859 1860 /* 1861 * Check if source directory is in the path of the target directory. Target 1862 * is supplied locked, source is unlocked. The target is always vput before 1863 * returning. Modeled after UFS. 1864 * 1865 * If source is on the path from target to the root, return error. 1866 */ 1867 1868 static int 1869 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1870 { 1871 struct udf_mount *ump = target->ump; 1872 struct udf_node *res_node; 1873 struct long_ad icb_loc, *root_icb; 1874 const char *name; 1875 int namelen; 1876 int error, found; 1877 1878 name = ".."; 1879 namelen = 2; 1880 error = 0; 1881 res_node = target; 1882 1883 root_icb = &ump->fileset_desc->rootdir_icb; 1884 1885 /* if nodes are equal, it is no use looking */ 1886 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1887 error = EEXIST; 1888 goto out; 1889 } 1890 1891 /* nothing can exist before the root */ 1892 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1893 error = 0; 1894 goto out; 1895 } 1896 1897 for (;;) { 1898 DPRINTF(NODE, ("udf_on_rootpath : " 1899 "source vp %p, looking at vp %p\n", 1900 source->vnode, res_node->vnode)); 1901 1902 /* sanity check */ 1903 if (res_node->vnode->v_type != VDIR) { 1904 error = ENOTDIR; 1905 goto out; 1906 } 1907 1908 /* go down one level */ 1909 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1910 &icb_loc, &found); 1911 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1912 "found %d\n", error, found)); 1913 1914 if (!found) 1915 error = ENOENT; 1916 if (error) 1917 goto out; 1918 1919 /* did we encounter source node? */ 1920 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1921 error = EINVAL; 1922 goto out; 1923 } 1924 1925 /* did we encounter the root node? */ 1926 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1927 error = 0; 1928 goto out; 1929 } 1930 1931 /* push our intermediate node, we're done with it */ 1932 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1933 vput(res_node->vnode); 1934 1935 DPRINTF(NODE, ("\tgetting the .. node\n")); 1936 error = udf_get_node(ump, &icb_loc, &res_node); 1937 1938 if (error) { /* argh, bail out */ 1939 KASSERT(res_node == NULL); 1940 // res_node = NULL; 1941 goto out; 1942 } 1943 } 1944 out: 1945 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1946 1947 /* put our last node */ 1948 if (res_node) 1949 vput(res_node->vnode); 1950 1951 return error; 1952 } 1953 1954 /* note: i tried to follow the logics of the tmpfs rename code */ 1955 int 1956 udf_rename(void *v) 1957 { 1958 struct vop_rename_args /* { 1959 struct vnode *a_fdvp; 1960 struct vnode *a_fvp; 1961 struct componentname *a_fcnp; 1962 struct vnode *a_tdvp; 1963 struct vnode *a_tvp; 1964 struct componentname *a_tcnp; 1965 } */ *ap = v; 1966 struct vnode *tvp = ap->a_tvp; 1967 struct vnode *tdvp = ap->a_tdvp; 1968 struct vnode *fvp = ap->a_fvp; 1969 struct vnode *fdvp = ap->a_fdvp; 1970 struct componentname *tcnp = ap->a_tcnp; 1971 struct componentname *fcnp = ap->a_fcnp; 1972 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1973 struct vattr fvap, tvap; 1974 int error; 1975 1976 DPRINTF(CALL, ("udf_rename called\n")); 1977 1978 /* disallow cross-device renames */ 1979 if (fvp->v_mount != tdvp->v_mount || 1980 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1981 error = EXDEV; 1982 goto out_unlocked; 1983 } 1984 1985 fnode = VTOI(fvp); 1986 fdnode = VTOI(fdvp); 1987 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1988 tdnode = VTOI(tdvp); 1989 1990 /* lock our source dir */ 1991 if (fdnode != tdnode) { 1992 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1993 if (error != 0) 1994 goto out_unlocked; 1995 } 1996 1997 /* get info about the node to be moved */ 1998 vn_lock(fvp, LK_SHARED | LK_RETRY); 1999 error = VOP_GETATTR(fvp, &fvap, FSCRED); 2000 VOP_UNLOCK(fvp); 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(tvp, &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 error = relookup(tdvp, &tvp, tcnp, 0); 2056 if (error) { 2057 vput(tdvp); 2058 goto out; 2059 } 2060 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2061 } 2062 2063 /* remove existing entry if present */ 2064 if (tvp) 2065 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2066 2067 /* create new directory entry for the node */ 2068 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2069 if (error) 2070 goto out; 2071 2072 /* unlink old directory entry for the node, if failing, unattach new */ 2073 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2074 if (error) 2075 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2076 if (error) 2077 goto out; 2078 2079 /* update tnode's '..' if moving directory to new parent */ 2080 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2081 /* update fnode's '..' entry */ 2082 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2083 if (error) { 2084 /* 'try' to recover from this situation */ 2085 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2086 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2087 } 2088 } 2089 2090 out: 2091 if (fdnode != tdnode) 2092 VOP_UNLOCK(fdvp); 2093 2094 out_unlocked: 2095 VOP_ABORTOP(tdvp, tcnp); 2096 if (tdvp == tvp) 2097 vrele(tdvp); 2098 else 2099 vput(tdvp); 2100 if (tvp) 2101 vput(tvp); 2102 VOP_ABORTOP(fdvp, fcnp); 2103 2104 /* release source nodes. */ 2105 vrele(fdvp); 2106 vrele(fvp); 2107 2108 return error; 2109 } 2110 2111 /* --------------------------------------------------------------------- */ 2112 2113 int 2114 udf_remove(void *v) 2115 { 2116 struct vop_remove_args /* { 2117 struct vnode *a_dvp; 2118 struct vnode *a_vp; 2119 struct componentname *a_cnp; 2120 } */ *ap = v; 2121 struct vnode *dvp = ap->a_dvp; 2122 struct vnode *vp = ap->a_vp; 2123 struct componentname *cnp = ap->a_cnp; 2124 struct udf_node *dir_node = VTOI(dvp); 2125 struct udf_node *udf_node = VTOI(vp); 2126 struct udf_mount *ump = dir_node->ump; 2127 int error; 2128 2129 DPRINTF(CALL, ("udf_remove called\n")); 2130 if (vp->v_type != VDIR) { 2131 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2132 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2133 } else { 2134 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2135 error = EPERM; 2136 } 2137 2138 if (error == 0) { 2139 VN_KNOTE(vp, NOTE_DELETE); 2140 VN_KNOTE(dvp, NOTE_WRITE); 2141 } 2142 2143 if (dvp == vp) 2144 vrele(vp); 2145 else 2146 vput(vp); 2147 vput(dvp); 2148 2149 return error; 2150 } 2151 2152 /* --------------------------------------------------------------------- */ 2153 2154 int 2155 udf_rmdir(void *v) 2156 { 2157 struct vop_rmdir_args /* { 2158 struct vnode *a_dvp; 2159 struct vnode *a_vp; 2160 struct componentname *a_cnp; 2161 } */ *ap = v; 2162 struct vnode *vp = ap->a_vp; 2163 struct vnode *dvp = ap->a_dvp; 2164 struct componentname *cnp = ap->a_cnp; 2165 struct udf_node *dir_node = VTOI(dvp); 2166 struct udf_node *udf_node = VTOI(vp); 2167 struct udf_mount *ump = dir_node->ump; 2168 int refcnt, error; 2169 2170 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2171 2172 /* don't allow '.' to be deleted */ 2173 if (dir_node == udf_node) { 2174 vrele(dvp); 2175 vput(vp); 2176 return EINVAL; 2177 } 2178 2179 /* check to see if the directory is empty */ 2180 error = 0; 2181 if (dir_node->fe) { 2182 refcnt = udf_rw16(udf_node->fe->link_cnt); 2183 } else { 2184 refcnt = udf_rw16(udf_node->efe->link_cnt); 2185 } 2186 if (refcnt > 1) { 2187 /* NOT empty */ 2188 vput(dvp); 2189 vput(vp); 2190 return ENOTEMPTY; 2191 } 2192 2193 /* detach the node from the directory */ 2194 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2195 if (error == 0) { 2196 cache_purge(vp); 2197 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2198 VN_KNOTE(vp, NOTE_DELETE); 2199 } 2200 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2201 2202 /* unput the nodes and exit */ 2203 vput(dvp); 2204 vput(vp); 2205 2206 return error; 2207 } 2208 2209 /* --------------------------------------------------------------------- */ 2210 2211 int 2212 udf_fsync(void *v) 2213 { 2214 struct vop_fsync_args /* { 2215 struct vnode *a_vp; 2216 kauth_cred_t a_cred; 2217 int a_flags; 2218 off_t offlo; 2219 off_t offhi; 2220 struct proc *a_p; 2221 } */ *ap = v; 2222 struct vnode *vp = ap->a_vp; 2223 struct udf_node *udf_node = VTOI(vp); 2224 int error, flags, wait; 2225 2226 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2227 udf_node, 2228 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2229 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2230 2231 /* flush data and wait for it when requested */ 2232 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2233 error = vflushbuf(vp, ap->a_flags); 2234 if (error) 2235 return error; 2236 2237 if (udf_node == NULL) { 2238 printf("udf_fsync() called on NULL udf_node!\n"); 2239 return 0; 2240 } 2241 if (vp->v_tag != VT_UDF) { 2242 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2243 return 0; 2244 } 2245 2246 /* set our times */ 2247 udf_itimes(udf_node, NULL, NULL, NULL); 2248 2249 /* if called when mounted readonly, never write back */ 2250 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2251 return 0; 2252 2253 /* if only data is requested, return */ 2254 if (ap->a_flags & FSYNC_DATAONLY) 2255 return 0; 2256 2257 /* check if the node is dirty 'enough'*/ 2258 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2259 if (flags == 0) 2260 return 0; 2261 2262 /* if we don't have to wait, check for IO pending */ 2263 if (!wait) { 2264 if (vp->v_numoutput > 0) { 2265 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2266 return 0; 2267 } 2268 if (udf_node->outstanding_bufs > 0) { 2269 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2270 return 0; 2271 } 2272 if (udf_node->outstanding_nodedscr > 0) { 2273 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2274 return 0; 2275 } 2276 } 2277 2278 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2279 if (wait) { 2280 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2281 mutex_enter(vp->v_interlock); 2282 while (vp->v_numoutput) { 2283 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2284 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2285 } 2286 mutex_exit(vp->v_interlock); 2287 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2288 } 2289 2290 /* write out node and wait for it if requested */ 2291 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2292 error = udf_writeout_node(udf_node, wait); 2293 if (error) 2294 return error; 2295 2296 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2297 2298 return 0; 2299 } 2300 2301 /* --------------------------------------------------------------------- */ 2302 2303 int 2304 udf_advlock(void *v) 2305 { 2306 struct vop_advlock_args /* { 2307 struct vnode *a_vp; 2308 void *a_id; 2309 int a_op; 2310 struct flock *a_fl; 2311 int a_flags; 2312 } */ *ap = v; 2313 struct vnode *vp = ap->a_vp; 2314 struct udf_node *udf_node = VTOI(vp); 2315 struct file_entry *fe; 2316 struct extfile_entry *efe; 2317 uint64_t file_size; 2318 2319 DPRINTF(LOCKING, ("udf_advlock called\n")); 2320 2321 /* get directory filesize */ 2322 if (udf_node->fe) { 2323 fe = udf_node->fe; 2324 file_size = udf_rw64(fe->inf_len); 2325 } else { 2326 assert(udf_node->efe); 2327 efe = udf_node->efe; 2328 file_size = udf_rw64(efe->inf_len); 2329 } 2330 2331 return lf_advlock(ap, &udf_node->lockf, file_size); 2332 } 2333 2334 /* --------------------------------------------------------------------- */ 2335 2336 /* Global vfs vnode data structures for udfs */ 2337 int (**udf_vnodeop_p)(void *); 2338 2339 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2340 { &vop_default_desc, vn_default_error }, 2341 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2342 { &vop_create_desc, udf_create }, /* create */ 2343 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2344 { &vop_open_desc, udf_open }, /* open */ 2345 { &vop_close_desc, udf_close }, /* close */ 2346 { &vop_access_desc, udf_access }, /* access */ 2347 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2348 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2349 { &vop_read_desc, udf_read }, /* read */ 2350 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2351 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2352 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2353 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2354 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2355 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2356 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2357 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2358 { &vop_seek_desc, genfs_seek }, /* seek */ 2359 { &vop_remove_desc, udf_remove }, /* remove */ 2360 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2361 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2362 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2363 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2364 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2365 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2366 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2367 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2368 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2369 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2370 { &vop_lock_desc, genfs_lock }, /* lock */ 2371 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2372 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2373 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2374 /* { &vop_print_desc, udf_print }, */ /* print */ 2375 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2376 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2377 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2378 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2379 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2380 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2381 { NULL, NULL } 2382 }; 2383 2384 2385 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2386 &udf_vnodeop_p, udf_vnodeop_entries 2387 }; 2388
Indexes created Thu Oct 02 14:10:14 GMT 2025