udf_vnops.c revision 1.19.2.2
1 /* $NetBSD: udf_vnops.c,v 1.19.2.2 2008/07/18 16:37:48 simonb 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 1.19.2.2 2008/07/18 16:37:48 simonb 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 int advice = IO_ADV_DECODE(ap->a_ioflag); 277 struct uvm_object *uobj; 278 struct udf_node *udf_node = VTOI(vp); 279 struct file_entry *fe; 280 struct extfile_entry *efe; 281 void *win; 282 uint64_t file_size, old_size; 283 vsize_t len; 284 int error; 285 int flags, resid, extended; 286 287 /* 288 * XXX writing to extended attributes not yet implemented. FreeBSD has 289 * it in mind to forward the IO_EXT read call to the 290 * VOP_READEXTATTR(). 291 */ 292 293 DPRINTF(WRITE, ("udf_write called\n")); 294 295 /* can this happen? some filingsystems have this check */ 296 if (uio->uio_offset < 0) 297 return EINVAL; 298 if (uio->uio_resid == 0) 299 return 0; 300 301 /* protect against rogue programs writing raw directories or links */ 302 if ((ioflag & IO_ALTSEMANTICS) == 0) { 303 if (vp->v_type == VDIR) 304 return EISDIR; 305 /* all but regular files just give EINVAL for now */ 306 if (vp->v_type != VREG) 307 return EINVAL; 308 } 309 310 assert(udf_node); 311 assert(udf_node->fe || udf_node->efe); 312 313 /* get file/directory filesize */ 314 if (udf_node->fe) { 315 fe = udf_node->fe; 316 file_size = udf_rw64(fe->inf_len); 317 } else { 318 assert(udf_node->efe); 319 efe = udf_node->efe; 320 file_size = udf_rw64(efe->inf_len); 321 } 322 old_size = file_size; 323 324 /* if explicitly asked to append, uio_offset can be wrong? */ 325 if (ioflag & IO_APPEND) 326 uio->uio_offset = file_size; 327 328 extended = (uio->uio_offset + uio->uio_resid > file_size); 329 if (extended) { 330 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 331 file_size, uio->uio_offset + uio->uio_resid)); 332 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 333 if (error) 334 return error; 335 file_size = uio->uio_offset + uio->uio_resid; 336 } 337 338 /* write contents using buffercache */ 339 uobj = &vp->v_uobj; 340 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 341 resid = uio->uio_resid; 342 error = 0; 343 344 uvm_vnp_setwritesize(vp, file_size); 345 while (uio->uio_resid > 0) { 346 /* maximise length to file extremity */ 347 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 348 if (len == 0) 349 break; 350 351 /* ubc, here we come, prepare to trap */ 352 win = ubc_alloc(uobj, uio->uio_offset, &len, 353 advice, UBC_WRITE); 354 error = uiomove(win, len, uio); 355 ubc_release(win, flags); 356 if (error) 357 break; 358 } 359 uvm_vnp_setsize(vp, file_size); 360 361 /* mark node changed and request update */ 362 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 363 364 /* 365 * XXX TODO FFS has code here to reset setuid & setgid when we're not 366 * the superuser as a precaution against tampering. 367 */ 368 369 /* if we wrote a thing, note write action on vnode */ 370 if (resid > uio->uio_resid) 371 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 372 373 if (error) { 374 /* bring back file size to its former size */ 375 /* take notice of its errors? */ 376 (void) udf_chsize(vp, (u_quad_t) old_size, NOCRED); 377 378 /* roll back uio */ 379 uio->uio_offset -= resid - uio->uio_resid; 380 uio->uio_resid = resid; 381 } else { 382 /* if we write and we're synchronous, update node */ 383 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 384 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 385 } 386 387 return error; 388 } 389 390 391 /* --------------------------------------------------------------------- */ 392 393 /* 394 * `Special' bmap functionality that translates all incomming requests to 395 * translate to vop_strategy() calls with the same blocknumbers effectively 396 * not translating at all. 397 */ 398 399 int 400 udf_trivial_bmap(void *v) 401 { 402 struct vop_bmap_args /* { 403 struct vnode *a_vp; 404 daddr_t a_bn; 405 struct vnode **a_vpp; 406 daddr_t *a_bnp; 407 int *a_runp; 408 } */ *ap = v; 409 struct vnode *vp = ap->a_vp; /* our node */ 410 struct vnode **vpp = ap->a_vpp; /* return node */ 411 daddr_t *bnp = ap->a_bnp; /* translated */ 412 daddr_t bn = ap->a_bn; /* origional */ 413 int *runp = ap->a_runp; 414 struct udf_node *udf_node = VTOI(vp); 415 uint32_t lb_size; 416 417 /* get logical block size */ 418 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 419 420 /* could return `-1' to indicate holes/zeros */ 421 /* translate 1:1 */ 422 *bnp = bn; 423 424 /* set the vnode to read the data from with strategy on itself */ 425 if (vpp) 426 *vpp = vp; 427 428 /* set runlength of maximum block size */ 429 if (runp) 430 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 431 432 /* return success */ 433 return 0; 434 } 435 436 /* --------------------------------------------------------------------- */ 437 438 int 439 udf_vfsstrategy(void *v) 440 { 441 struct vop_strategy_args /* { 442 struct vnode *a_vp; 443 struct buf *a_bp; 444 } */ *ap = v; 445 struct vnode *vp = ap->a_vp; 446 struct buf *bp = ap->a_bp; 447 struct udf_node *udf_node = VTOI(vp); 448 uint32_t lb_size, from, sectors; 449 int error; 450 451 DPRINTF(STRATEGY, ("udf_strategy called\n")); 452 453 /* check if we ought to be here */ 454 if (vp->v_type == VBLK || vp->v_type == VCHR) 455 panic("udf_strategy: spec"); 456 457 /* only filebuffers ought to be read/write by this, no descriptors */ 458 assert(bp->b_blkno >= 0); 459 460 /* get sector size */ 461 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 462 463 /* calculate sector to start from */ 464 from = bp->b_blkno; 465 466 /* calculate length to fetch/store in sectors */ 467 sectors = bp->b_bcount / lb_size; 468 assert(bp->b_bcount > 0); 469 470 /* NEVER assume later that this buffer is already translated */ 471 /* bp->b_lblkno = bp->b_blkno; */ 472 473 /* check assertions: we OUGHT to always get multiples of this */ 474 assert(sectors * lb_size == bp->b_bcount); 475 476 /* issue buffer */ 477 error = 0; 478 if (bp->b_flags & B_READ) { 479 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 480 ", sector %d for %d sectors\n", 481 vp, bp, bp->b_blkno, from, sectors)); 482 483 /* read buffer from the udf_node, translate vtop on the way*/ 484 udf_read_filebuf(udf_node, bp); 485 } else { 486 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 487 ", sector %d for %d sectors\n", 488 vp, bp, bp->b_blkno, from, sectors)); 489 490 /* write buffer to the udf_node, translate vtop on the way*/ 491 udf_write_filebuf(udf_node, bp); 492 } 493 494 return bp->b_error; 495 } 496 497 /* --------------------------------------------------------------------- */ 498 499 int 500 udf_readdir(void *v) 501 { 502 struct vop_readdir_args /* { 503 struct vnode *a_vp; 504 struct uio *a_uio; 505 kauth_cred_t a_cred; 506 int *a_eofflag; 507 off_t **a_cookies; 508 int *a_ncookies; 509 } */ *ap = v; 510 struct uio *uio = ap->a_uio; 511 struct vnode *vp = ap->a_vp; 512 struct udf_node *udf_node = VTOI(vp); 513 struct file_entry *fe; 514 struct extfile_entry *efe; 515 struct fileid_desc *fid; 516 struct dirent *dirent; 517 uint64_t file_size, diroffset, transoffset; 518 uint32_t lb_size; 519 int error; 520 521 DPRINTF(READDIR, ("udf_readdir called\n")); 522 523 /* This operation only makes sense on directory nodes. */ 524 if (vp->v_type != VDIR) 525 return ENOTDIR; 526 527 /* get directory filesize */ 528 if (udf_node->fe) { 529 fe = udf_node->fe; 530 file_size = udf_rw64(fe->inf_len); 531 } else { 532 assert(udf_node->efe); 533 efe = udf_node->efe; 534 file_size = udf_rw64(efe->inf_len); 535 } 536 537 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 538 539 /* 540 * Add `.' pseudo entry if at offset zero since its not in the fid 541 * stream 542 */ 543 if (uio->uio_offset == 0) { 544 DPRINTF(READDIR, ("\t'.' inserted\n")); 545 strcpy(dirent->d_name, "."); 546 dirent->d_fileno = udf_calchash(&udf_node->loc); 547 dirent->d_type = DT_DIR; 548 dirent->d_namlen = strlen(dirent->d_name); 549 dirent->d_reclen = _DIRENT_SIZE(dirent); 550 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 551 552 /* mark with magic value that we have done the dummy */ 553 uio->uio_offset = UDF_DIRCOOKIE_DOT; 554 } 555 556 /* we are called just as long as we keep on pushing data in */ 557 error = 0; 558 if ((uio->uio_offset < file_size) && 559 (uio->uio_resid >= sizeof(struct dirent))) { 560 /* allocate temporary space for fid */ 561 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 562 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 563 564 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 565 uio->uio_offset = 0; 566 567 diroffset = uio->uio_offset; 568 transoffset = diroffset; 569 while (diroffset < file_size) { 570 DPRINTF(READDIR, ("\tread in fid stream\n")); 571 /* transfer a new fid/dirent */ 572 error = udf_read_fid_stream(vp, &diroffset, 573 fid, dirent); 574 DPRINTFIF(READDIR, error, ("read error in read fid " 575 "stream : %d\n", error)); 576 if (error) 577 break; 578 579 /* 580 * If there isn't enough space in the uio to return a 581 * whole dirent, break off read 582 */ 583 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 584 break; 585 586 /* remember the last entry we transfered */ 587 transoffset = diroffset; 588 589 /* skip deleted entries */ 590 if (fid->file_char & UDF_FILE_CHAR_DEL) 591 continue; 592 593 /* skip not visible files */ 594 if (fid->file_char & UDF_FILE_CHAR_VIS) 595 continue; 596 597 /* copy dirent to the caller */ 598 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 599 dirent->d_name, dirent->d_type)); 600 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 601 } 602 603 /* pass on last transfered offset */ 604 uio->uio_offset = transoffset; 605 free(fid, M_UDFTEMP); 606 } 607 608 if (ap->a_eofflag) 609 *ap->a_eofflag = (uio->uio_offset == file_size); 610 611 #ifdef DEBUG 612 if (udf_verbose & UDF_DEBUG_READDIR) { 613 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 614 if (ap->a_eofflag) 615 printf("returning EOF ? %d\n", *ap->a_eofflag); 616 if (error) 617 printf("readdir returning error %d\n", error); 618 } 619 #endif 620 621 free(dirent, M_UDFTEMP); 622 return error; 623 } 624 625 /* --------------------------------------------------------------------- */ 626 627 int 628 udf_lookup(void *v) 629 { 630 struct vop_lookup_args /* { 631 struct vnode *a_dvp; 632 struct vnode **a_vpp; 633 struct componentname *a_cnp; 634 } */ *ap = v; 635 struct vnode *dvp = ap->a_dvp; 636 struct vnode **vpp = ap->a_vpp; 637 struct componentname *cnp = ap->a_cnp; 638 struct udf_node *dir_node, *res_node; 639 struct udf_mount *ump; 640 struct long_ad icb_loc; 641 const char *name; 642 int namelen, nameiop, islastcn, mounted_ro; 643 int vnodetp; 644 int error, found; 645 646 dir_node = VTOI(dvp); 647 ump = dir_node->ump; 648 *vpp = NULL; 649 650 DPRINTF(LOOKUP, ("udf_lookup called\n")); 651 652 /* simplify/clarification flags */ 653 nameiop = cnp->cn_nameiop; 654 islastcn = cnp->cn_flags & ISLASTCN; 655 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 656 657 /* check exec/dirread permissions first */ 658 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 659 if (error) 660 return error; 661 662 DPRINTF(LOOKUP, ("\taccess ok\n")); 663 664 /* 665 * If requesting a modify on the last path element on a read-only 666 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 667 */ 668 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 669 return EROFS; 670 671 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 672 cnp->cn_nameptr)); 673 /* look in the nami cache; returns 0 on success!! */ 674 error = cache_lookup(dvp, vpp, cnp); 675 if (error >= 0) 676 return error; 677 678 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 679 680 /* 681 * Obviously, the file is not (anymore) in the namecache, we have to 682 * search for it. There are three basic cases: '.', '..' and others. 683 * 684 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 685 */ 686 error = 0; 687 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 688 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 689 /* special case 1 '.' */ 690 VREF(dvp); 691 *vpp = dvp; 692 /* done */ 693 } else if (cnp->cn_flags & ISDOTDOT) { 694 /* special case 2 '..' */ 695 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 696 697 /* get our node */ 698 name = ".."; 699 namelen = 2; 700 error = udf_lookup_name_in_dir(dvp, name, namelen, 701 &icb_loc, &found); 702 if (error) 703 goto out; 704 if (!found) 705 error = ENOENT; 706 707 /* first unlock parent */ 708 VOP_UNLOCK(dvp, 0); 709 710 if (error == 0) { 711 DPRINTF(LOOKUP, ("\tfound '..'\n")); 712 /* try to create/reuse the node */ 713 error = udf_get_node(ump, &icb_loc, &res_node); 714 715 if (!error) { 716 DPRINTF(LOOKUP, 717 ("\tnode retrieved/created OK\n")); 718 *vpp = res_node->vnode; 719 } 720 } 721 722 /* try to relock parent */ 723 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 724 } else { 725 DPRINTF(LOOKUP, ("\tlookup file\n")); 726 /* all other files */ 727 /* lookup filename in the directory; location icb_loc */ 728 name = cnp->cn_nameptr; 729 namelen = cnp->cn_namelen; 730 error = udf_lookup_name_in_dir(dvp, name, namelen, 731 &icb_loc, &found); 732 if (error) 733 goto out; 734 if (!found) { 735 DPRINTF(LOOKUP, ("\tNOT found\n")); 736 /* 737 * UGH, didn't find name. If we're creating or 738 * renaming on the last name this is OK and we ought 739 * to return EJUSTRETURN if its allowed to be created. 740 */ 741 error = ENOENT; 742 if (islastcn && 743 (nameiop == CREATE || nameiop == RENAME)) 744 error = 0; 745 if (!error) { 746 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 747 if (!error) { 748 /* keep the component name */ 749 cnp->cn_flags |= SAVENAME; 750 error = EJUSTRETURN; 751 } 752 } 753 /* done */ 754 } else { 755 /* try to create/reuse the node */ 756 error = udf_get_node(ump, &icb_loc, &res_node); 757 if (!error) { 758 /* 759 * If we are not at the last path component 760 * and found a non-directory or non-link entry 761 * (which may itself be pointing to a 762 * directory), raise an error. 763 */ 764 vnodetp = res_node->vnode->v_type; 765 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 766 if (!islastcn) 767 error = ENOTDIR; 768 } 769 770 } 771 if (!error) { 772 *vpp = res_node->vnode; 773 } 774 } 775 } 776 777 out: 778 /* 779 * Store result in the cache if requested. If we are creating a file, 780 * the file might not be found and thus putting it into the namecache 781 * might be seen as negative caching. 782 */ 783 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 784 cache_enter(dvp, *vpp, cnp); 785 786 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 787 788 return error; 789 } 790 791 /* --------------------------------------------------------------------- */ 792 793 int 794 udf_getattr(void *v) 795 { 796 struct vop_getattr_args /* { 797 struct vnode *a_vp; 798 struct vattr *a_vap; 799 kauth_cred_t a_cred; 800 struct lwp *a_l; 801 } */ *ap = v; 802 struct vnode *vp = ap->a_vp; 803 struct udf_node *udf_node = VTOI(vp); 804 struct udf_mount *ump = udf_node->ump; 805 struct file_entry *fe = udf_node->fe; 806 struct extfile_entry *efe = udf_node->efe; 807 struct filetimes_extattr_entry *ft_extattr; 808 struct device_extattr_entry *devattr; 809 struct vattr *vap = ap->a_vap; 810 struct timestamp *atime, *mtime, *attrtime, *creatime; 811 uint64_t filesize, blkssize; 812 uint32_t nlink; 813 uint32_t offset, a_l; 814 uint8_t *filedata; 815 uid_t uid; 816 gid_t gid; 817 int error; 818 819 DPRINTF(CALL, ("udf_getattr called\n")); 820 821 /* update times before we returning values */ 822 udf_itimes(udf_node, NULL, NULL, NULL); 823 824 /* get descriptor information */ 825 if (fe) { 826 nlink = udf_rw16(fe->link_cnt); 827 uid = (uid_t)udf_rw32(fe->uid); 828 gid = (gid_t)udf_rw32(fe->gid); 829 filesize = udf_rw64(fe->inf_len); 830 blkssize = udf_rw64(fe->logblks_rec); 831 atime = &fe->atime; 832 mtime = &fe->mtime; 833 attrtime = &fe->attrtime; 834 filedata = fe->data; 835 836 /* initial guess */ 837 creatime = mtime; 838 839 /* check our extended attribute if present */ 840 error = udf_extattr_search_intern(udf_node, 841 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 842 if (!error) { 843 ft_extattr = (struct filetimes_extattr_entry *) 844 (filedata + offset); 845 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 846 creatime = &ft_extattr->times[0]; 847 } 848 } else { 849 assert(udf_node->efe); 850 nlink = udf_rw16(efe->link_cnt); 851 uid = (uid_t)udf_rw32(efe->uid); 852 gid = (gid_t)udf_rw32(efe->gid); 853 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 854 blkssize = udf_rw64(efe->logblks_rec); 855 atime = &efe->atime; 856 mtime = &efe->mtime; 857 attrtime = &efe->attrtime; 858 creatime = &efe->ctime; 859 filedata = efe->data; 860 } 861 862 /* do the uid/gid translation game */ 863 if ((uid == (uid_t) -1) && (gid == (gid_t) -1)) { 864 uid = ump->mount_args.anon_uid; 865 gid = ump->mount_args.anon_gid; 866 } 867 868 /* fill in struct vattr with values from the node */ 869 VATTR_NULL(vap); 870 vap->va_type = vp->v_type; 871 vap->va_mode = udf_getaccessmode(udf_node); 872 vap->va_nlink = nlink; 873 vap->va_uid = uid; 874 vap->va_gid = gid; 875 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 876 vap->va_fileid = udf_calchash(&udf_node->loc); /* inode hash XXX */ 877 vap->va_size = filesize; 878 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 879 880 /* 881 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 882 * 1 to the link count if its a directory we're requested attributes 883 * of. 884 */ 885 if (vap->va_type == VDIR) 886 vap->va_nlink++; 887 888 /* access times */ 889 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 890 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 891 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 892 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 893 894 vap->va_gen = 1; /* no multiple generations yes (!?) */ 895 vap->va_flags = 0; /* no flags */ 896 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 897 vap->va_filerev = 1; /* TODO file revision numbers? */ 898 vap->va_vaflags = 0; 899 /* TODO get vaflags from the extended attributes? */ 900 901 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 902 error = udf_extattr_search_intern(udf_node, 903 UDF_DEVICESPEC_ATTR_NO, "", 904 &offset, &a_l); 905 /* if error, deny access */ 906 if (error || (filedata == NULL)) { 907 vap->va_mode = 0; /* or v_type = VNON? */ 908 } else { 909 devattr = (struct device_extattr_entry *) 910 filedata + offset; 911 vap->va_rdev = makedev( 912 udf_rw32(devattr->major), 913 udf_rw32(devattr->minor) 914 ); 915 /* TODO we could check the implementator */ 916 } 917 } 918 919 return 0; 920 } 921 922 /* --------------------------------------------------------------------- */ 923 924 static int 925 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 926 kauth_cred_t cred) 927 { 928 struct udf_node *udf_node = VTOI(vp); 929 uid_t euid, uid; 930 gid_t egid, gid; 931 int issuperuser, ismember; 932 int error; 933 934 #ifdef notyet 935 /* TODO get vaflags from the extended attributes? */ 936 /* Immutable or append-only files cannot be modified, either. */ 937 if (udf_node->flags & (IMMUTABLE | APPEND)) 938 return EPERM; 939 #endif 940 941 if (vp->v_mount->mnt_flag & MNT_RDONLY) 942 return EROFS; 943 944 /* retrieve old values */ 945 udf_getownership(udf_node, &uid, &gid); 946 947 /* only one could be specified */ 948 if (new_uid == VNOVAL) 949 new_uid = uid; 950 if (new_gid == VNOVAL) 951 new_gid = gid; 952 953 /* check if we can fit it in an 32 bits */ 954 if ((uid_t) ((uint32_t) uid) != uid) 955 return EINVAL; 956 if ((gid_t) ((uint32_t) gid) != gid) 957 return EINVAL; 958 959 /* 960 * If we don't own the file, are trying to change the owner of the 961 * file, or are not a member of the target group, the caller's 962 * credentials must imply super-user privilege or the call fails. 963 */ 964 965 /* check permissions */ 966 euid = kauth_cred_geteuid(cred); 967 egid = kauth_cred_getegid(cred); 968 if ((error = kauth_cred_ismember_gid(cred, new_gid, &ismember))) 969 return error; 970 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 971 issuperuser = (error == 0); 972 973 if (!issuperuser) { 974 if ((new_uid != uid) || (euid != uid)) 975 return EPERM; 976 if ((new_gid != gid) && !(egid == new_gid || ismember)) 977 return EPERM; 978 } 979 980 /* change the ownership */ 981 udf_setownership(udf_node, new_uid, new_gid); 982 983 /* mark node changed */ 984 udf_node->i_flags |= IN_CHANGE; 985 986 return 0; 987 } 988 989 990 static int 991 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 992 { 993 struct udf_node *udf_node = VTOI(vp); 994 uid_t euid, uid; 995 gid_t egid, gid; 996 int issuperuser, ismember; 997 int error; 998 999 #ifdef notyet 1000 /* TODO get vaflags from the extended attributes? */ 1001 /* Immutable or append-only files cannot be modified, either. */ 1002 if (udf_node->flags & (IMMUTABLE | APPEND)) 1003 return EPERM; 1004 #endif 1005 1006 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1007 return EROFS; 1008 1009 /* retrieve uid/gid values */ 1010 udf_getownership(udf_node, &uid, &gid); 1011 1012 /* check permissions */ 1013 euid = kauth_cred_geteuid(cred); 1014 egid = kauth_cred_getegid(cred); 1015 if ((error = kauth_cred_ismember_gid(cred, gid, &ismember))) 1016 return error; 1017 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1018 issuperuser = (error == 0); 1019 1020 if ((euid != uid) && !issuperuser) 1021 return EPERM; 1022 if (euid != 0) { 1023 if (vp->v_type != VDIR && (mode & S_ISTXT)) 1024 return EFTYPE; 1025 1026 if ((!ismember) && (mode & S_ISGID)) 1027 return EPERM; 1028 } 1029 1030 /* change mode */ 1031 udf_setaccessmode(udf_node, mode); 1032 1033 /* mark node changed */ 1034 udf_node->i_flags |= IN_CHANGE; 1035 1036 return 0; 1037 } 1038 1039 1040 /* exported */ 1041 int 1042 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1043 { 1044 struct udf_node *udf_node = VTOI(vp); 1045 int error, extended; 1046 1047 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1048 return EROFS; 1049 1050 /* Decide whether this is a valid operation based on the file type. */ 1051 switch (vp->v_type) { 1052 case VDIR: 1053 return EISDIR; 1054 case VREG: 1055 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1056 return EROFS; 1057 break; 1058 case VBLK: 1059 /* FALLTHROUGH */ 1060 case VCHR: 1061 /* FALLTHROUGH */ 1062 case VFIFO: 1063 /* Allow modifications of special files even if in the file 1064 * system is mounted read-only (we are not modifying the 1065 * files themselves, but the objects they represent). */ 1066 return 0; 1067 default: 1068 /* Anything else is unsupported. */ 1069 return EOPNOTSUPP; 1070 } 1071 1072 #if notyet 1073 /* TODO get vaflags from the extended attributes? */ 1074 /* Immutable or append-only files cannot be modified, either. */ 1075 if (node->flags & (IMMUTABLE | APPEND)) 1076 return EPERM; 1077 #endif 1078 1079 /* resize file to the requested size */ 1080 error = udf_resize_node(udf_node, newsize, &extended); 1081 1082 if (error == 0) { 1083 /* mark change */ 1084 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1085 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1086 udf_update(vp, NULL, NULL, NULL, 0); 1087 } 1088 1089 return error; 1090 } 1091 1092 1093 static int 1094 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1095 { 1096 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1097 return EROFS; 1098 1099 /* XXX we can't do this yet XXX */ 1100 1101 return EINVAL; 1102 } 1103 1104 1105 static int 1106 udf_chtimes(struct vnode *vp, 1107 struct timespec *atime, struct timespec *mtime, 1108 struct timespec *birthtime, int setattrflags, 1109 kauth_cred_t cred) 1110 { 1111 struct udf_node *udf_node = VTOI(vp); 1112 uid_t euid, uid; 1113 gid_t gid; 1114 int issuperuser; 1115 int error; 1116 1117 #ifdef notyet 1118 /* TODO get vaflags from the extended attributes? */ 1119 /* Immutable or append-only files cannot be modified, either. */ 1120 if (udf_node->flags & (IMMUTABLE | APPEND)) 1121 return EPERM; 1122 #endif 1123 1124 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1125 return EROFS; 1126 1127 /* retrieve uid/gid values */ 1128 udf_getownership(udf_node, &uid, &gid); 1129 1130 /* check permissions */ 1131 euid = kauth_cred_geteuid(cred); 1132 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1133 issuperuser = (error == 0); 1134 1135 if (!issuperuser) { 1136 if (euid != uid) 1137 return EPERM; 1138 if ((setattrflags & VA_UTIMES_NULL) == 0) { 1139 error = VOP_ACCESS(vp, VWRITE, cred); 1140 if (error) 1141 return error; 1142 } 1143 } 1144 1145 /* update node flags depending on what times are passed */ 1146 if (atime->tv_sec != VNOVAL) 1147 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1148 udf_node->i_flags |= IN_ACCESS; 1149 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1150 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1151 1152 return udf_update(vp, atime, mtime, birthtime, 0); 1153 } 1154 1155 1156 int 1157 udf_setattr(void *v) 1158 { 1159 struct vop_setattr_args /* { 1160 struct vnode *a_vp; 1161 struct vattr *a_vap; 1162 kauth_cred_t a_cred; 1163 struct lwp *a_l; 1164 } */ *ap = v; 1165 struct vnode *vp = ap->a_vp; 1166 /* struct udf_node *udf_node = VTOI(vp); */ 1167 /* struct udf_mount *ump = udf_node->ump; */ 1168 kauth_cred_t cred = ap->a_cred; 1169 struct vattr *vap = ap->a_vap; 1170 int error; 1171 1172 DPRINTF(CALL, ("udf_setattr called\n")); 1173 1174 /* Abort if any unsettable attribute is given. */ 1175 error = 0; 1176 if (vap->va_type != VNON || 1177 vap->va_nlink != VNOVAL || 1178 vap->va_fsid != VNOVAL || 1179 vap->va_fileid != VNOVAL || 1180 vap->va_blocksize != VNOVAL || 1181 #ifdef notyet 1182 /* checks are debated */ 1183 vap->va_ctime.tv_sec != VNOVAL || 1184 vap->va_ctime.tv_nsec != VNOVAL || 1185 vap->va_birthtime.tv_sec != VNOVAL || 1186 vap->va_birthtime.tv_nsec != VNOVAL || 1187 #endif 1188 vap->va_gen != VNOVAL || 1189 vap->va_rdev != VNOVAL || 1190 vap->va_bytes != VNOVAL) 1191 error = EINVAL; 1192 1193 DPRINTF(ATTR, ("setattr changing:\n")); 1194 if (error == 0 && (vap->va_flags != VNOVAL)) { 1195 DPRINTF(ATTR, ("\tchflags\n")); 1196 error = udf_chflags(vp, vap->va_flags, cred); 1197 } 1198 1199 if (error == 0 && (vap->va_size != VNOVAL)) { 1200 DPRINTF(ATTR, ("\tchsize\n")); 1201 error = udf_chsize(vp, vap->va_size, cred); 1202 } 1203 1204 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1205 DPRINTF(ATTR, ("\tchown\n")); 1206 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1207 } 1208 1209 if (error == 0 && (vap->va_mode != VNOVAL)) { 1210 DPRINTF(ATTR, ("\tchmod\n")); 1211 error = udf_chmod(vp, vap->va_mode, cred); 1212 } 1213 1214 if (error == 0 && 1215 ((vap->va_atime.tv_sec != VNOVAL && 1216 vap->va_atime.tv_nsec != VNOVAL) || 1217 (vap->va_mtime.tv_sec != VNOVAL && 1218 vap->va_mtime.tv_nsec != VNOVAL)) 1219 ) { 1220 DPRINTF(ATTR, ("\tchtimes\n")); 1221 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1222 &vap->va_birthtime, vap->va_vaflags, cred); 1223 } 1224 VN_KNOTE(vp, NOTE_ATTRIB); 1225 1226 return error; 1227 } 1228 1229 /* --------------------------------------------------------------------- */ 1230 1231 /* 1232 * Return POSIX pathconf information for UDF file systems. 1233 */ 1234 int 1235 udf_pathconf(void *v) 1236 { 1237 struct vop_pathconf_args /* { 1238 struct vnode *a_vp; 1239 int a_name; 1240 register_t *a_retval; 1241 } */ *ap = v; 1242 uint32_t bits; 1243 1244 DPRINTF(CALL, ("udf_pathconf called\n")); 1245 1246 switch (ap->a_name) { 1247 case _PC_LINK_MAX: 1248 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1249 return 0; 1250 case _PC_NAME_MAX: 1251 *ap->a_retval = NAME_MAX; 1252 return 0; 1253 case _PC_PATH_MAX: 1254 *ap->a_retval = PATH_MAX; 1255 return 0; 1256 case _PC_PIPE_BUF: 1257 *ap->a_retval = PIPE_BUF; 1258 return 0; 1259 case _PC_CHOWN_RESTRICTED: 1260 *ap->a_retval = 1; 1261 return 0; 1262 case _PC_NO_TRUNC: 1263 *ap->a_retval = 1; 1264 return 0; 1265 case _PC_SYNC_IO: 1266 *ap->a_retval = 0; /* synchronised is off for performance */ 1267 return 0; 1268 case _PC_FILESIZEBITS: 1269 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1270 bits = 64; /* XXX ought to deliver 65 */ 1271 #if 0 1272 if (udf_node) 1273 bits = 64 * vp->v_mount->mnt_dev_bshift; 1274 #endif 1275 *ap->a_retval = bits; 1276 return 0; 1277 } 1278 1279 return EINVAL; 1280 } 1281 1282 1283 /* --------------------------------------------------------------------- */ 1284 1285 int 1286 udf_open(void *v) 1287 { 1288 struct vop_open_args /* { 1289 struct vnode *a_vp; 1290 int a_mode; 1291 kauth_cred_t a_cred; 1292 struct proc *a_p; 1293 } */ *ap = v; 1294 int flags; 1295 1296 DPRINTF(CALL, ("udf_open called\n")); 1297 1298 /* 1299 * Files marked append-only must be opened for appending. 1300 * TODO: get chflags(2) flags from extened attribute. 1301 */ 1302 flags = 0; 1303 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1304 return (EPERM); 1305 1306 return 0; 1307 } 1308 1309 1310 /* --------------------------------------------------------------------- */ 1311 1312 int 1313 udf_close(void *v) 1314 { 1315 struct vop_close_args /* { 1316 struct vnode *a_vp; 1317 int a_fflag; 1318 kauth_cred_t a_cred; 1319 struct proc *a_p; 1320 } */ *ap = v; 1321 struct vnode *vp = ap->a_vp; 1322 struct udf_node *udf_node = VTOI(vp); 1323 1324 DPRINTF(CALL, ("udf_close called\n")); 1325 udf_node = udf_node; /* shut up gcc */ 1326 1327 mutex_enter(&vp->v_interlock); 1328 if (vp->v_usecount > 1) 1329 udf_itimes(udf_node, NULL, NULL, NULL); 1330 mutex_exit(&vp->v_interlock); 1331 1332 return 0; 1333 } 1334 1335 1336 /* --------------------------------------------------------------------- */ 1337 1338 int 1339 udf_access(void *v) 1340 { 1341 struct vop_access_args /* { 1342 struct vnode *a_vp; 1343 int a_mode; 1344 kauth_cred_t a_cred; 1345 struct proc *a_p; 1346 } */ *ap = v; 1347 struct vnode *vp = ap->a_vp; 1348 mode_t mode = ap->a_mode; 1349 kauth_cred_t cred = ap->a_cred; 1350 /* struct udf_node *udf_node = VTOI(vp); */ 1351 struct vattr vap; 1352 int flags; 1353 int error; 1354 1355 DPRINTF(CALL, ("udf_access called\n")); 1356 1357 error = VOP_GETATTR(vp, &vap, NULL); 1358 if (error) 1359 return error; 1360 1361 /* check if we are allowed to write */ 1362 switch (vap.va_type) { 1363 case VDIR: 1364 case VLNK: 1365 case VREG: 1366 /* 1367 * normal nodes: check if we're on a read-only mounted 1368 * filingsystem and bomb out if we're trying to write. 1369 */ 1370 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1371 return EROFS; 1372 break; 1373 case VBLK: 1374 case VCHR: 1375 case VSOCK: 1376 case VFIFO: 1377 /* 1378 * special nodes: even on read-only mounted filingsystems 1379 * these are allowed to be written to if permissions allow. 1380 */ 1381 break; 1382 default: 1383 /* no idea what this is */ 1384 return EINVAL; 1385 } 1386 1387 /* noone may write immutable files */ 1388 /* TODO: get chflags(2) flags from extened attribute. */ 1389 flags = 0; 1390 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1391 return EPERM; 1392 1393 /* ask the generic vaccess to advice on security */ 1394 return vaccess(vp->v_type, 1395 vap.va_mode, vap.va_uid, vap.va_gid, 1396 mode, cred); 1397 } 1398 1399 /* --------------------------------------------------------------------- */ 1400 1401 int 1402 udf_create(void *v) 1403 { 1404 struct vop_create_args /* { 1405 struct vnode *a_dvp; 1406 struct vnode **a_vpp; 1407 struct componentname *a_cnp; 1408 struct vattr *a_vap; 1409 } */ *ap = v; 1410 struct vnode *dvp = ap->a_dvp; 1411 struct vnode **vpp = ap->a_vpp; 1412 struct vattr *vap = ap->a_vap; 1413 struct componentname *cnp = ap->a_cnp; 1414 int error; 1415 1416 DPRINTF(CALL, ("udf_create called\n")); 1417 error = udf_create_node(dvp, vpp, vap, cnp); 1418 1419 if (error || !(cnp->cn_flags & SAVESTART)) 1420 PNBUF_PUT(cnp->cn_pnbuf); 1421 vput(dvp); 1422 return error; 1423 } 1424 1425 /* --------------------------------------------------------------------- */ 1426 1427 int 1428 udf_mknod(void *v) 1429 { 1430 struct vop_mknod_args /* { 1431 struct vnode *a_dvp; 1432 struct vnode **a_vpp; 1433 struct componentname *a_cnp; 1434 struct vattr *a_vap; 1435 } */ *ap = v; 1436 struct vnode *dvp = ap->a_dvp; 1437 struct vnode **vpp = ap->a_vpp; 1438 struct vattr *vap = ap->a_vap; 1439 struct componentname *cnp = ap->a_cnp; 1440 int error; 1441 1442 DPRINTF(CALL, ("udf_mknod called\n")); 1443 error = udf_create_node(dvp, vpp, vap, cnp); 1444 1445 if (error || !(cnp->cn_flags & SAVESTART)) 1446 PNBUF_PUT(cnp->cn_pnbuf); 1447 vput(dvp); 1448 return error; 1449 } 1450 1451 /* --------------------------------------------------------------------- */ 1452 1453 int 1454 udf_mkdir(void *v) 1455 { 1456 struct vop_mkdir_args /* { 1457 struct vnode *a_dvp; 1458 struct vnode **a_vpp; 1459 struct componentname *a_cnp; 1460 struct vattr *a_vap; 1461 } */ *ap = v; 1462 struct vnode *dvp = ap->a_dvp; 1463 struct vnode **vpp = ap->a_vpp; 1464 struct vattr *vap = ap->a_vap; 1465 struct componentname *cnp = ap->a_cnp; 1466 int error; 1467 1468 DPRINTF(CALL, ("udf_mkdir called\n")); 1469 error = udf_create_node(dvp, vpp, vap, cnp); 1470 1471 if (error || !(cnp->cn_flags & SAVESTART)) 1472 PNBUF_PUT(cnp->cn_pnbuf); 1473 vput(dvp); 1474 return error; 1475 } 1476 1477 /* --------------------------------------------------------------------- */ 1478 1479 static int 1480 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1481 { 1482 struct udf_node *udf_node, *dir_node; 1483 struct vattr vap; 1484 int error; 1485 1486 DPRINTF(CALL, ("udf_link called\n")); 1487 error = 0; 1488 1489 /* some quick checks */ 1490 if (vp->v_type == VDIR) 1491 return EPERM; /* can't link a directory */ 1492 if (dvp->v_mount != vp->v_mount) 1493 return EXDEV; /* can't link across devices */ 1494 if (dvp == vp) 1495 return EPERM; /* can't be the same */ 1496 1497 /* lock node */ 1498 error = vn_lock(vp, LK_EXCLUSIVE); 1499 if (error) 1500 return error; 1501 1502 /* get attributes */ 1503 dir_node = VTOI(dvp); 1504 udf_node = VTOI(vp); 1505 1506 error = VOP_GETATTR(vp, &vap, FSCRED); 1507 if (error) 1508 return error; 1509 1510 /* check link count overflow */ 1511 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1512 return EMLINK; 1513 1514 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1515 } 1516 1517 int 1518 udf_link(void *v) 1519 { 1520 struct vop_link_args /* { 1521 struct vnode *a_dvp; 1522 struct vnode *a_vp; 1523 struct componentname *a_cnp; 1524 } */ *ap = v; 1525 struct vnode *dvp = ap->a_dvp; 1526 struct vnode *vp = ap->a_vp; 1527 struct componentname *cnp = ap->a_cnp; 1528 int error; 1529 1530 error = udf_do_link(dvp, vp, cnp); 1531 if (error) 1532 VOP_ABORTOP(dvp, cnp); 1533 1534 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1535 VOP_UNLOCK(vp, 0); 1536 1537 VN_KNOTE(vp, NOTE_LINK); 1538 VN_KNOTE(dvp, NOTE_WRITE); 1539 vput(dvp); 1540 1541 return error; 1542 } 1543 1544 /* --------------------------------------------------------------------- */ 1545 1546 static int 1547 udf_do_symlink(struct udf_node *udf_node, char *target) 1548 { 1549 struct pathcomp pathcomp; 1550 uint8_t *pathbuf, *pathpos, *compnamepos; 1551 char *mntonname; 1552 int pathlen, len, compnamelen, mntonnamelen; 1553 int error; 1554 1555 /* process `target' to an UDF structure */ 1556 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1557 pathpos = pathbuf; 1558 pathlen = 0; 1559 1560 if (*target == '/') { 1561 /* symlink starts from the root */ 1562 len = UDF_PATH_COMP_SIZE; 1563 memset(&pathcomp, 0, len); 1564 pathcomp.type = UDF_PATH_COMP_ROOT; 1565 1566 /* check if its mount-point relative! */ 1567 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1568 mntonnamelen = strlen(mntonname); 1569 if (strlen(target) >= mntonnamelen) { 1570 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1571 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1572 target += mntonnamelen; 1573 } 1574 } else { 1575 target++; 1576 } 1577 1578 memcpy(pathpos, &pathcomp, len); 1579 pathpos += len; 1580 pathlen += len; 1581 } 1582 1583 error = 0; 1584 while (*target) { 1585 /* ignore multiple '/' */ 1586 while (*target == '/') { 1587 target++; 1588 } 1589 if (!*target) 1590 break; 1591 1592 /* extract component name */ 1593 compnamelen = 0; 1594 compnamepos = target; 1595 while ((*target) && (*target != '/')) { 1596 target++; 1597 compnamelen++; 1598 } 1599 1600 /* just trunc if too long ?? (security issue) */ 1601 if (compnamelen >= 127) { 1602 error = ENAMETOOLONG; 1603 break; 1604 } 1605 1606 /* convert unix name to UDF name */ 1607 len = sizeof(struct pathcomp); 1608 memset(&pathcomp, 0, len); 1609 pathcomp.type = UDF_PATH_COMP_NAME; 1610 len = UDF_PATH_COMP_SIZE; 1611 1612 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1613 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1614 if ((compnamelen == 1) && (*compnamepos == '.')) 1615 pathcomp.type = UDF_PATH_COMP_CURDIR; 1616 1617 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1618 unix_to_udf_name( 1619 (char *) &pathcomp.ident, &pathcomp.l_ci, 1620 compnamepos, compnamelen, 1621 &udf_node->ump->logical_vol->desc_charset); 1622 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1623 } 1624 1625 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1626 error = ENAMETOOLONG; 1627 break; 1628 } 1629 1630 memcpy(pathpos, &pathcomp, len); 1631 pathpos += len; 1632 pathlen += len; 1633 } 1634 1635 if (error) { 1636 /* aparently too big */ 1637 free(pathbuf, M_UDFTEMP); 1638 return error; 1639 } 1640 1641 error = udf_grow_node(udf_node, pathlen); 1642 if (error) { 1643 /* failed to pregrow node */ 1644 free(pathbuf, M_UDFTEMP); 1645 return error; 1646 } 1647 1648 /* write out structure on the new file */ 1649 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1650 pathbuf, pathlen, 0, 1651 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1652 FSCRED, NULL, NULL); 1653 if (error) { 1654 /* failed to write out symlink contents */ 1655 free(pathbuf, M_UDFTEMP); 1656 return error; 1657 } 1658 1659 return 0; 1660 } 1661 1662 1663 int 1664 udf_symlink(void *v) 1665 { 1666 struct vop_symlink_args /* { 1667 struct vnode *a_dvp; 1668 struct vnode **a_vpp; 1669 struct componentname *a_cnp; 1670 struct vattr *a_vap; 1671 char *a_target; 1672 } */ *ap = v; 1673 struct vnode *dvp = ap->a_dvp; 1674 struct vnode **vpp = ap->a_vpp; 1675 struct vattr *vap = ap->a_vap; 1676 struct componentname *cnp = ap->a_cnp; 1677 struct udf_node *dir_node; 1678 struct udf_node *udf_node; 1679 int error; 1680 1681 DPRINTF(CALL, ("udf_symlink called\n")); 1682 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1683 error = udf_create_node(dvp, vpp, vap, cnp); 1684 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1685 if (!error) { 1686 dir_node = VTOI(dvp); 1687 udf_node = VTOI(*vpp); 1688 KASSERT(udf_node); 1689 error = udf_do_symlink(udf_node, ap->a_target); 1690 if (error) { 1691 /* remove node */ 1692 udf_shrink_node(udf_node, 0); 1693 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1694 } 1695 } 1696 if (error || !(cnp->cn_flags & SAVESTART)) 1697 PNBUF_PUT(cnp->cn_pnbuf); 1698 vput(dvp); 1699 return error; 1700 } 1701 1702 /* --------------------------------------------------------------------- */ 1703 1704 int 1705 udf_readlink(void *v) 1706 { 1707 struct vop_readlink_args /* { 1708 struct vnode *a_vp; 1709 struct uio *a_uio; 1710 kauth_cred_t a_cred; 1711 } */ *ap = v; 1712 struct vnode *vp = ap->a_vp; 1713 struct uio *uio = ap->a_uio; 1714 kauth_cred_t cred = ap->a_cred; 1715 struct udf_node *udf_node; 1716 struct pathcomp pathcomp; 1717 struct vattr vattr; 1718 uint8_t *pathbuf, *targetbuf, *tmpname; 1719 uint8_t *pathpos, *targetpos; 1720 char *mntonname; 1721 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1722 int first, error; 1723 1724 DPRINTF(CALL, ("udf_readlink called\n")); 1725 1726 udf_node = VTOI(vp); 1727 error = VOP_GETATTR(vp, &vattr, cred); 1728 if (error) 1729 return error; 1730 1731 /* claim temporary buffers for translation */ 1732 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1733 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1734 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1735 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1736 memset(targetbuf, 0, PATH_MAX); 1737 1738 /* read contents of file in our temporary buffer */ 1739 error = vn_rdwr(UIO_READ, udf_node->vnode, 1740 pathbuf, vattr.va_size, 0, 1741 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1742 FSCRED, NULL, NULL); 1743 if (error) { 1744 /* failed to read in symlink contents */ 1745 free(pathbuf, M_UDFTEMP); 1746 free(targetbuf, M_UDFTEMP); 1747 free(tmpname, M_UDFTEMP); 1748 return error; 1749 } 1750 1751 /* convert to a unix path */ 1752 pathpos = pathbuf; 1753 pathlen = 0; 1754 targetpos = targetbuf; 1755 targetlen = PATH_MAX; 1756 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1757 mntonnamelen = strlen(mntonname); 1758 1759 error = 0; 1760 first = 1; 1761 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1762 len = UDF_PATH_COMP_SIZE; 1763 memcpy(&pathcomp, pathpos, len); 1764 l_ci = pathcomp.l_ci; 1765 switch (pathcomp.type) { 1766 case UDF_PATH_COMP_ROOT : 1767 /* XXX should check for l_ci; bugcompatible now */ 1768 if ((targetlen < 1) || !first) { 1769 error = EINVAL; 1770 break; 1771 } 1772 *targetpos++ = '/'; targetlen--; 1773 break; 1774 case UDF_PATH_COMP_MOUNTROOT : 1775 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1776 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1777 error = EINVAL; 1778 break; 1779 } 1780 memcpy(targetpos, mntonname, mntonnamelen); 1781 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1782 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1783 /* more follows, so must be directory */ 1784 *targetpos++ = '/'; targetlen--; 1785 } 1786 break; 1787 case UDF_PATH_COMP_PARENTDIR : 1788 /* XXX should check for l_ci; bugcompatible now */ 1789 if (targetlen < 3) { 1790 error = EINVAL; 1791 break; 1792 } 1793 *targetpos++ = '.'; targetlen--; 1794 *targetpos++ = '.'; targetlen--; 1795 *targetpos++ = '/'; targetlen--; 1796 break; 1797 case UDF_PATH_COMP_CURDIR : 1798 /* XXX should check for l_ci; bugcompatible now */ 1799 if (targetlen < 2) { 1800 error = EINVAL; 1801 break; 1802 } 1803 *targetpos++ = '.'; targetlen--; 1804 *targetpos++ = '/'; targetlen--; 1805 break; 1806 case UDF_PATH_COMP_NAME : 1807 if (l_ci == 0) { 1808 error = EINVAL; 1809 break; 1810 } 1811 memset(tmpname, 0, PATH_MAX); 1812 memcpy(&pathcomp, pathpos, len + l_ci); 1813 udf_to_unix_name(tmpname, MAXPATHLEN, 1814 pathcomp.ident, l_ci, 1815 &udf_node->ump->logical_vol->desc_charset); 1816 namelen = strlen(tmpname); 1817 if (targetlen < namelen + 1) { 1818 error = EINVAL; 1819 break; 1820 } 1821 memcpy(targetpos, tmpname, namelen); 1822 targetpos += namelen; targetlen -= namelen; 1823 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1824 /* more follows, so must be directory */ 1825 *targetpos++ = '/'; targetlen--; 1826 } 1827 break; 1828 default : 1829 error = EINVAL; 1830 break; 1831 } 1832 first = 0; 1833 if (error) 1834 break; 1835 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1836 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1837 1838 } 1839 /* all processed? */ 1840 if (vattr.va_size - pathlen > 0) 1841 error = EINVAL; 1842 1843 /* uiomove() to destination */ 1844 if (!error) 1845 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1846 1847 free(pathbuf, M_UDFTEMP); 1848 free(targetbuf, M_UDFTEMP); 1849 free(tmpname, M_UDFTEMP); 1850 1851 return error; 1852 } 1853 1854 /* --------------------------------------------------------------------- */ 1855 1856 /* note: i tried to follow the logics of the tmpfs rename code */ 1857 int 1858 udf_rename(void *v) 1859 { 1860 struct vop_rename_args /* { 1861 struct vnode *a_fdvp; 1862 struct vnode *a_fvp; 1863 struct componentname *a_fcnp; 1864 struct vnode *a_tdvp; 1865 struct vnode *a_tvp; 1866 struct componentname *a_tcnp; 1867 } */ *ap = v; 1868 struct vnode *tvp = ap->a_tvp; 1869 struct vnode *tdvp = ap->a_tdvp; 1870 struct vnode *fvp = ap->a_fvp; 1871 struct vnode *fdvp = ap->a_fdvp; 1872 struct componentname *tcnp = ap->a_tcnp; 1873 struct componentname *fcnp = ap->a_fcnp; 1874 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1875 struct vattr fvap, tvap; 1876 int error; 1877 1878 DPRINTF(CALL, ("udf_rename called\n")); 1879 1880 /* disallow cross-device renames */ 1881 if (fvp->v_mount != tdvp->v_mount || 1882 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1883 error = EXDEV; 1884 goto out_unlocked; 1885 } 1886 1887 fnode = VTOI(fvp); 1888 fdnode = VTOI(fdvp); 1889 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1890 tdnode = VTOI(tdvp); 1891 1892 /* lock our source dir */ 1893 if (fdnode != tdnode) { 1894 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1895 if (error != 0) 1896 goto out_unlocked; 1897 } 1898 1899 /* get info about the node to be moved */ 1900 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1901 KASSERT(error == 0); 1902 1903 /* check when to delete the old already existing entry */ 1904 if (tvp) { 1905 /* get info about the node to be moved to */ 1906 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1907 KASSERT(error == 0); 1908 1909 /* if both dirs, make sure the destination is empty */ 1910 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1911 if (tvap.va_nlink > 2) { 1912 error = ENOTEMPTY; 1913 goto out; 1914 } 1915 } 1916 /* if moving dir, make sure destination is dir too */ 1917 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1918 error = ENOTDIR; 1919 goto out; 1920 } 1921 /* if we're moving a non-directory, make sure dest is no dir */ 1922 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1923 error = EISDIR; 1924 goto out; 1925 } 1926 } 1927 1928 /* dont allow renaming directories acros directory for now */ 1929 if (fdnode != tdnode) { 1930 if (fvp->v_type == VDIR) { 1931 error = EINVAL; 1932 goto out; 1933 } 1934 } 1935 1936 /* remove existing entry if present */ 1937 if (tvp) 1938 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1939 1940 /* create new directory entry for the node */ 1941 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1942 if (error) 1943 goto out; 1944 1945 /* unlink old directory entry for the node, if failing, unattach new */ 1946 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1947 if (error) 1948 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1949 1950 out: 1951 if (fdnode != tdnode) 1952 VOP_UNLOCK(fdvp, 0); 1953 1954 out_unlocked: 1955 VOP_ABORTOP(tdvp, tcnp); 1956 if (tdvp == tvp) 1957 vrele(tdvp); 1958 else 1959 vput(tdvp); 1960 if (tvp) 1961 vput(tvp); 1962 VOP_ABORTOP(fdvp, fcnp); 1963 1964 /* release source nodes. */ 1965 vrele(fdvp); 1966 vrele(fvp); 1967 1968 return error; 1969 } 1970 1971 /* --------------------------------------------------------------------- */ 1972 1973 int 1974 udf_remove(void *v) 1975 { 1976 struct vop_remove_args /* { 1977 struct vnode *a_dvp; 1978 struct vnode *a_vp; 1979 struct componentname *a_cnp; 1980 } */ *ap = v; 1981 struct vnode *dvp = ap->a_dvp; 1982 struct vnode *vp = ap->a_vp; 1983 struct componentname *cnp = ap->a_cnp; 1984 struct udf_node *dir_node = VTOI(dvp);; 1985 struct udf_node *udf_node = VTOI(vp); 1986 struct udf_mount *ump = dir_node->ump; 1987 int error; 1988 1989 DPRINTF(CALL, ("udf_remove called\n")); 1990 if (vp->v_type != VDIR) { 1991 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1992 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1993 } else { 1994 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1995 error = EPERM; 1996 } 1997 1998 if (error == 0) { 1999 VN_KNOTE(vp, NOTE_DELETE); 2000 VN_KNOTE(dvp, NOTE_WRITE); 2001 } 2002 2003 if (dvp == vp) 2004 vrele(vp); 2005 else 2006 vput(vp); 2007 vput(dvp); 2008 2009 return error; 2010 } 2011 2012 /* --------------------------------------------------------------------- */ 2013 2014 int 2015 udf_rmdir(void *v) 2016 { 2017 struct vop_rmdir_args /* { 2018 struct vnode *a_dvp; 2019 struct vnode *a_vp; 2020 struct componentname *a_cnp; 2021 } */ *ap = v; 2022 struct vnode *vp = ap->a_vp; 2023 struct vnode *dvp = ap->a_dvp; 2024 struct componentname *cnp = ap->a_cnp; 2025 struct udf_node *dir_node = VTOI(dvp);; 2026 struct udf_node *udf_node = VTOI(vp); 2027 struct udf_mount *ump = dir_node->ump; 2028 int refcnt, error; 2029 2030 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2031 2032 /* don't allow '.' to be deleted */ 2033 if (dir_node == udf_node) { 2034 vrele(dvp); 2035 vput(vp); 2036 return EINVAL; 2037 } 2038 2039 /* check to see if the directory is empty */ 2040 error = 0; 2041 if (dir_node->fe) { 2042 refcnt = udf_rw16(udf_node->fe->link_cnt); 2043 } else { 2044 refcnt = udf_rw16(udf_node->efe->link_cnt); 2045 } 2046 if (refcnt > 1) { 2047 /* NOT empty */ 2048 vput(dvp); 2049 vput(vp); 2050 return ENOTEMPTY; 2051 } 2052 2053 /* detach the node from the directory */ 2054 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2055 if (error == 0) { 2056 cache_purge(vp); 2057 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2058 VN_KNOTE(vp, NOTE_DELETE); 2059 } 2060 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2061 2062 /* unput the nodes and exit */ 2063 vput(dvp); 2064 vput(vp); 2065 2066 return error; 2067 } 2068 2069 /* --------------------------------------------------------------------- */ 2070 2071 int 2072 udf_fsync(void *v) 2073 { 2074 struct vop_fsync_args /* { 2075 struct vnode *a_vp; 2076 kauth_cred_t a_cred; 2077 int a_flags; 2078 off_t offlo; 2079 off_t offhi; 2080 struct proc *a_p; 2081 } */ *ap = v; 2082 struct vnode *vp = ap->a_vp; 2083 struct udf_node *udf_node = VTOI(vp); 2084 int error, flags, wait; 2085 2086 DPRINTF(STRATEGY, ("udf_fsync called : %s, %s\n", 2087 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2088 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2089 2090 /* flush data and wait for it when requested */ 2091 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2092 vflushbuf(vp, wait); 2093 2094 if (udf_node == NULL) { 2095 printf("udf_fsync() called on NULL udf_node!\n"); 2096 return 0; 2097 } 2098 if (vp->v_tag != VT_UDF) { 2099 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2100 return 0; 2101 } 2102 2103 /* set our times */ 2104 udf_itimes(udf_node, NULL, NULL, NULL); 2105 2106 /* if called when mounted readonly, never write back */ 2107 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2108 return 0; 2109 2110 /* if only data is requested, return */ 2111 if (ap->a_flags & FSYNC_DATAONLY) 2112 return 0; 2113 2114 /* check if the node is dirty 'enough'*/ 2115 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2116 if (flags == 0) 2117 return 0; 2118 2119 /* if we don't have to wait, check for IO pending */ 2120 if (!wait) { 2121 if (vp->v_numoutput > 0) { 2122 DPRINTF(NODE, ("udf_fsync: rejecting on v_numoutput\n")); 2123 return 0; 2124 } 2125 if (udf_node->outstanding_bufs > 0) { 2126 DPRINTF(NODE, ("udf_fsync: rejecting on outstanding_bufs\n")); 2127 return 0; 2128 } 2129 if (udf_node->outstanding_nodedscr > 0) { 2130 DPRINTF(NODE, ("udf_fsync: rejecting on outstanding_nodedscr\n")); 2131 return 0; 2132 } 2133 } 2134 2135 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2136 if (wait) { 2137 DPRINTF(SYNC, ("udf_fsync, waiting\n")); 2138 mutex_enter(&vp->v_interlock); 2139 while (vp->v_numoutput) { 2140 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2141 } 2142 mutex_exit(&vp->v_interlock); 2143 DPRINTF(SYNC, ("udf_fsync: fin wait\n")); 2144 } 2145 2146 /* write out node and wait for it if requested */ 2147 error = udf_writeout_node(udf_node, wait); 2148 if (error) 2149 return error; 2150 2151 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2152 2153 return 0; 2154 } 2155 2156 /* --------------------------------------------------------------------- */ 2157 2158 int 2159 udf_advlock(void *v) 2160 { 2161 struct vop_advlock_args /* { 2162 struct vnode *a_vp; 2163 void *a_id; 2164 int a_op; 2165 struct flock *a_fl; 2166 int a_flags; 2167 } */ *ap = v; 2168 struct vnode *vp = ap->a_vp; 2169 struct udf_node *udf_node = VTOI(vp); 2170 struct file_entry *fe; 2171 struct extfile_entry *efe; 2172 uint64_t file_size; 2173 2174 DPRINTF(LOCKING, ("udf_advlock called\n")); 2175 2176 /* get directory filesize */ 2177 if (udf_node->fe) { 2178 fe = udf_node->fe; 2179 file_size = udf_rw64(fe->inf_len); 2180 } else { 2181 assert(udf_node->efe); 2182 efe = udf_node->efe; 2183 file_size = udf_rw64(efe->inf_len); 2184 } 2185 2186 return lf_advlock(ap, &udf_node->lockf, file_size); 2187 } 2188 2189 /* --------------------------------------------------------------------- */ 2190 2191 2192 /* Global vfs vnode data structures for udfs */ 2193 int (**udf_vnodeop_p) __P((void *)); 2194 2195 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2196 { &vop_default_desc, vn_default_error }, 2197 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2198 { &vop_create_desc, udf_create }, /* create */ 2199 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2200 { &vop_open_desc, udf_open }, /* open */ 2201 { &vop_close_desc, udf_close }, /* close */ 2202 { &vop_access_desc, udf_access }, /* access */ 2203 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2204 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2205 { &vop_read_desc, udf_read }, /* read */ 2206 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2207 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2208 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2209 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2210 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2211 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2212 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2213 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2214 { &vop_seek_desc, genfs_seek }, /* seek */ 2215 { &vop_remove_desc, udf_remove }, /* remove */ 2216 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2217 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2218 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2219 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2220 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2221 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2222 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2223 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2224 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2225 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2226 { &vop_lock_desc, genfs_lock }, /* lock */ 2227 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2228 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2229 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2230 /* { &vop_print_desc, udf_print }, */ /* print */ 2231 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2232 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2233 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2234 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2235 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2236 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2237 { NULL, NULL } 2238 }; 2239 2240 2241 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2242 &udf_vnodeop_p, udf_vnodeop_entries 2243 }; 2244 2245
Indexes created Thu Oct 02 14:10:14 GMT 2025