1 /* $NetBSD: udf_vnops.c,v 1.19 2008/05/19 20:12:36 reinoud 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 2008/05/19 20:12:36 reinoud 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, 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, 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, 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, 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 /* first unlock parent */ 698 VOP_UNLOCK(dvp, 0); 699 700 /* get our node */ 701 name = ".."; 702 namelen = 2; 703 found = udf_lookup_name_in_dir(dvp, name, namelen, &icb_loc); 704 if (!found) 705 error = ENOENT; 706 707 if (error == 0) { 708 DPRINTF(LOOKUP, ("\tfound '..'\n")); 709 /* try to create/reuse the node */ 710 error = udf_get_node(ump, &icb_loc, &res_node); 711 712 if (!error) { 713 DPRINTF(LOOKUP, ("\tnode retrieved/created OK\n")); 714 *vpp = res_node->vnode; 715 } 716 } 717 718 /* try to relock parent */ 719 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 720 } else { 721 DPRINTF(LOOKUP, ("\tlookup file\n")); 722 /* all other files */ 723 /* lookup filename in the directory; location icb_loc */ 724 name = cnp->cn_nameptr; 725 namelen = cnp->cn_namelen; 726 found = udf_lookup_name_in_dir(dvp, name, namelen, &icb_loc); 727 if (!found) { 728 DPRINTF(LOOKUP, ("\tNOT found\n")); 729 /* 730 * UGH, didn't find name. If we're creating or 731 * renaming on the last name this is OK and we ought 732 * to return EJUSTRETURN if its allowed to be created. 733 */ 734 error = ENOENT; 735 if (islastcn && 736 (nameiop == CREATE || nameiop == RENAME)) 737 error = 0; 738 if (!error) { 739 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 740 if (!error) { 741 /* keep the component name */ 742 cnp->cn_flags |= SAVENAME; 743 error = EJUSTRETURN; 744 } 745 } 746 /* done */ 747 } else { 748 /* try to create/reuse the node */ 749 error = udf_get_node(ump, &icb_loc, &res_node); 750 if (!error) { 751 /* 752 * If we are not at the last path component 753 * and found a non-directory or non-link entry 754 * (which may itself be pointing to a 755 * directory), raise an error. 756 */ 757 vnodetp = res_node->vnode->v_type; 758 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 759 if (!islastcn) 760 error = ENOTDIR; 761 } 762 763 } 764 if (!error) { 765 *vpp = res_node->vnode; 766 } 767 } 768 } 769 770 /* 771 * Store result in the cache if requested. If we are creating a file, 772 * the file might not be found and thus putting it into the namecache 773 * might be seen as negative caching. 774 */ 775 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 776 cache_enter(dvp, *vpp, cnp); 777 778 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 779 780 return error; 781 } 782 783 /* --------------------------------------------------------------------- */ 784 785 int 786 udf_getattr(void *v) 787 { 788 struct vop_getattr_args /* { 789 struct vnode *a_vp; 790 struct vattr *a_vap; 791 kauth_cred_t a_cred; 792 struct lwp *a_l; 793 } */ *ap = v; 794 struct vnode *vp = ap->a_vp; 795 struct udf_node *udf_node = VTOI(vp); 796 struct udf_mount *ump = udf_node->ump; 797 struct file_entry *fe = udf_node->fe; 798 struct extfile_entry *efe = udf_node->efe; 799 struct device_extattr_entry *devattr; 800 struct vattr *vap = ap->a_vap; 801 struct timestamp *atime, *mtime, *attrtime, *creatime; 802 uint64_t filesize, blkssize; 803 uint32_t nlink; 804 uint32_t offset, l_a; 805 uint8_t *filedata; 806 uid_t uid; 807 gid_t gid; 808 int error; 809 810 DPRINTF(CALL, ("udf_getattr called\n")); 811 812 /* update times before we returning values */ 813 udf_itimes(udf_node, NULL, NULL, NULL); 814 815 /* get descriptor information */ 816 if (fe) { 817 nlink = udf_rw16(fe->link_cnt); 818 uid = (uid_t)udf_rw32(fe->uid); 819 gid = (gid_t)udf_rw32(fe->gid); 820 filesize = udf_rw64(fe->inf_len); 821 blkssize = udf_rw64(fe->logblks_rec); 822 atime = &fe->atime; 823 mtime = &fe->mtime; 824 attrtime = &fe->attrtime; 825 creatime = mtime; 826 filedata = fe->data; 827 } else { 828 assert(udf_node->efe); 829 nlink = udf_rw16(efe->link_cnt); 830 uid = (uid_t)udf_rw32(efe->uid); 831 gid = (gid_t)udf_rw32(efe->gid); 832 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 833 blkssize = udf_rw64(efe->logblks_rec); 834 atime = &efe->atime; 835 mtime = &efe->mtime; 836 attrtime = &efe->attrtime; 837 creatime = &efe->ctime; 838 filedata = efe->data; 839 } 840 841 /* do the uid/gid translation game */ 842 if ((uid == (uid_t) -1) && (gid == (gid_t) -1)) { 843 uid = ump->mount_args.anon_uid; 844 gid = ump->mount_args.anon_gid; 845 } 846 847 /* fill in struct vattr with values from the node */ 848 VATTR_NULL(vap); 849 vap->va_type = vp->v_type; 850 vap->va_mode = udf_getaccessmode(udf_node); 851 vap->va_nlink = nlink; 852 vap->va_uid = uid; 853 vap->va_gid = gid; 854 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 855 vap->va_fileid = udf_calchash(&udf_node->loc); /* inode hash XXX */ 856 vap->va_size = filesize; 857 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 858 859 /* 860 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 861 * 1 to the link count if its a directory we're requested attributes 862 * of. 863 */ 864 if (vap->va_type == VDIR) 865 vap->va_nlink++; 866 867 /* access times */ 868 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 869 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 870 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 871 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 872 873 vap->va_gen = 1; /* no multiple generations yes (!?) */ 874 vap->va_flags = 0; /* no flags */ 875 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 876 vap->va_filerev = 1; /* TODO file revision numbers? */ 877 vap->va_vaflags = 0; 878 /* TODO get vaflags from the extended attributes? */ 879 880 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 881 error = udf_extattr_search_intern(udf_node, 882 UDF_DEVICESPEC_ATTR_NO, "", 883 &offset, &l_a); 884 /* if error, deny access */ 885 if (error || (filedata == NULL)) { 886 vap->va_mode = 0; /* or v_type = VNON? */ 887 } else { 888 devattr = (struct device_extattr_entry *) 889 filedata + offset; 890 vap->va_rdev = makedev( 891 udf_rw32(devattr->major), 892 udf_rw32(devattr->minor) 893 ); 894 /* TODO we could check the implementator */ 895 } 896 } 897 898 return 0; 899 } 900 901 /* --------------------------------------------------------------------- */ 902 903 static int 904 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 905 kauth_cred_t cred) 906 { 907 struct udf_node *udf_node = VTOI(vp); 908 uid_t euid, uid; 909 gid_t egid, gid; 910 int issuperuser, ismember; 911 int error; 912 913 #ifdef notyet 914 /* TODO get vaflags from the extended attributes? */ 915 /* Immutable or append-only files cannot be modified, either. */ 916 if (udf_node->flags & (IMMUTABLE | APPEND)) 917 return EPERM; 918 #endif 919 920 if (vp->v_mount->mnt_flag & MNT_RDONLY) 921 return EROFS; 922 923 /* retrieve old values */ 924 udf_getownership(udf_node, &uid, &gid); 925 926 /* only one could be specified */ 927 if (new_uid == VNOVAL) 928 new_uid = uid; 929 if (new_gid == VNOVAL) 930 new_gid = gid; 931 932 /* check if we can fit it in an 32 bits */ 933 if ((uid_t) ((uint32_t) uid) != uid) 934 return EINVAL; 935 if ((gid_t) ((uint32_t) gid) != gid) 936 return EINVAL; 937 938 /* 939 * If we don't own the file, are trying to change the owner of the 940 * file, or are not a member of the target group, the caller's 941 * credentials must imply super-user privilege or the call fails. 942 */ 943 944 /* check permissions */ 945 euid = kauth_cred_geteuid(cred); 946 egid = kauth_cred_getegid(cred); 947 if ((error = kauth_cred_ismember_gid(cred, new_gid, &ismember))) 948 return error; 949 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 950 issuperuser = (error == 0); 951 952 if (!issuperuser) { 953 if ((new_uid != uid) || (euid != uid)) 954 return EPERM; 955 if ((new_gid != gid) && !(egid == new_gid || ismember)) 956 return EPERM; 957 } 958 959 /* change the ownership */ 960 udf_setownership(udf_node, new_uid, new_gid); 961 962 /* mark node changed */ 963 udf_node->i_flags |= IN_CHANGE; 964 965 return 0; 966 } 967 968 969 static int 970 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 971 { 972 struct udf_node *udf_node = VTOI(vp); 973 uid_t euid, uid; 974 gid_t egid, gid; 975 int issuperuser, ismember; 976 int error; 977 978 #ifdef notyet 979 /* TODO get vaflags from the extended attributes? */ 980 /* Immutable or append-only files cannot be modified, either. */ 981 if (udf_node->flags & (IMMUTABLE | APPEND)) 982 return EPERM; 983 #endif 984 985 if (vp->v_mount->mnt_flag & MNT_RDONLY) 986 return EROFS; 987 988 /* retrieve uid/gid values */ 989 udf_getownership(udf_node, &uid, &gid); 990 991 /* check permissions */ 992 euid = kauth_cred_geteuid(cred); 993 egid = kauth_cred_getegid(cred); 994 if ((error = kauth_cred_ismember_gid(cred, gid, &ismember))) 995 return error; 996 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 997 issuperuser = (error == 0); 998 999 if ((euid != uid) && !issuperuser) 1000 return EPERM; 1001 if (euid != 0) { 1002 if (vp->v_type != VDIR && (mode & S_ISTXT)) 1003 return EFTYPE; 1004 1005 if ((!ismember) && (mode & S_ISGID)) 1006 return EPERM; 1007 } 1008 1009 /* change mode */ 1010 udf_setaccessmode(udf_node, mode); 1011 1012 /* mark node changed */ 1013 udf_node->i_flags |= IN_CHANGE; 1014 1015 return 0; 1016 } 1017 1018 1019 /* exported */ 1020 int 1021 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1022 { 1023 struct udf_node *udf_node = VTOI(vp); 1024 int error, extended; 1025 1026 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1027 return EROFS; 1028 1029 /* Decide whether this is a valid operation based on the file type. */ 1030 switch (vp->v_type) { 1031 case VDIR: 1032 return EISDIR; 1033 case VREG: 1034 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1035 return EROFS; 1036 break; 1037 case VBLK: 1038 /* FALLTHROUGH */ 1039 case VCHR: 1040 /* FALLTHROUGH */ 1041 case VFIFO: 1042 /* Allow modifications of special files even if in the file 1043 * system is mounted read-only (we are not modifying the 1044 * files themselves, but the objects they represent). */ 1045 return 0; 1046 default: 1047 /* Anything else is unsupported. */ 1048 return EOPNOTSUPP; 1049 } 1050 1051 #if notyet 1052 /* TODO get vaflags from the extended attributes? */ 1053 /* Immutable or append-only files cannot be modified, either. */ 1054 if (node->flags & (IMMUTABLE | APPEND)) 1055 return EPERM; 1056 #endif 1057 1058 /* resize file to the requested size */ 1059 error = udf_resize_node(udf_node, newsize, &extended); 1060 1061 if (error == 0) { 1062 /* mark change */ 1063 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1064 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1065 udf_update(vp, NULL, NULL, 0); 1066 } 1067 1068 return error; 1069 } 1070 1071 1072 static int 1073 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1074 { 1075 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1076 return EROFS; 1077 1078 /* XXX we can't do this yet XXX */ 1079 1080 return EINVAL; 1081 } 1082 1083 1084 static int 1085 udf_chtimes(struct vnode *vp, 1086 struct timespec *atime, struct timespec *mtime, 1087 struct timespec *birthtime, int setattrflags, 1088 kauth_cred_t cred) 1089 { 1090 struct udf_node *udf_node = VTOI(vp); 1091 uid_t euid, uid; 1092 gid_t gid; 1093 int issuperuser; 1094 int error; 1095 1096 #ifdef notyet 1097 /* TODO get vaflags from the extended attributes? */ 1098 /* Immutable or append-only files cannot be modified, either. */ 1099 if (udf_node->flags & (IMMUTABLE | APPEND)) 1100 return EPERM; 1101 #endif 1102 1103 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1104 return EROFS; 1105 1106 /* retrieve uid/gid values */ 1107 udf_getownership(udf_node, &uid, &gid); 1108 1109 /* check permissions */ 1110 euid = kauth_cred_geteuid(cred); 1111 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1112 issuperuser = (error == 0); 1113 1114 if (!issuperuser) { 1115 if (euid != uid) 1116 return EPERM; 1117 if ((setattrflags & VA_UTIMES_NULL) == 0) 1118 return error; 1119 error = VOP_ACCESS(vp, VWRITE, cred); 1120 if (error) 1121 return error; 1122 } 1123 1124 /* update node flags depending on what times are passed */ 1125 if (atime->tv_sec != VNOVAL) 1126 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1127 udf_node->i_flags |= IN_ACCESS; 1128 if (mtime->tv_sec != VNOVAL) 1129 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1130 1131 /* we need to take care of birthtime here */ 1132 if (birthtime->tv_sec != VNOVAL) { 1133 if (udf_node->efe) { 1134 /* in udf its [c]reation time */ 1135 udf_timespec_to_timestamp(birthtime, 1136 &udf_node->efe->ctime); 1137 } else { 1138 /* set extended times attribute */ 1139 printf("UDF: Can't set birthtime on file entry yet\n"); 1140 /* TODO setting birthtime on file entry */ 1141 } 1142 } 1143 1144 return udf_update(vp, atime, mtime, 0); 1145 } 1146 1147 1148 int 1149 udf_setattr(void *v) 1150 { 1151 struct vop_setattr_args /* { 1152 struct vnode *a_vp; 1153 struct vattr *a_vap; 1154 kauth_cred_t a_cred; 1155 struct lwp *a_l; 1156 } */ *ap = v; 1157 struct vnode *vp = ap->a_vp; 1158 /* struct udf_node *udf_node = VTOI(vp); */ 1159 /* struct udf_mount *ump = udf_node->ump; */ 1160 kauth_cred_t cred = ap->a_cred; 1161 struct vattr *vap = ap->a_vap; 1162 int error; 1163 1164 DPRINTF(CALL, ("udf_setattr called\n")); 1165 1166 /* Abort if any unsettable attribute is given. */ 1167 error = 0; 1168 if (vap->va_type != VNON || 1169 vap->va_nlink != VNOVAL || 1170 vap->va_fsid != VNOVAL || 1171 vap->va_fileid != VNOVAL || 1172 vap->va_blocksize != VNOVAL || 1173 #ifdef notyet 1174 /* check is debated */ 1175 vap->va_ctime.tv_sec != VNOVAL || 1176 vap->va_ctime.tv_nsec != VNOVAL || 1177 #endif 1178 vap->va_birthtime.tv_sec != VNOVAL || 1179 vap->va_birthtime.tv_nsec != VNOVAL || 1180 vap->va_gen != VNOVAL || 1181 vap->va_rdev != VNOVAL || 1182 vap->va_bytes != VNOVAL) 1183 error = EINVAL; 1184 1185 DPRINTF(ATTR, ("setattr changing:\n")); 1186 if (error == 0 && (vap->va_flags != VNOVAL)) { 1187 DPRINTF(ATTR, ("\tchflags\n")); 1188 error = udf_chflags(vp, vap->va_flags, cred); 1189 } 1190 1191 if (error == 0 && (vap->va_size != VNOVAL)) { 1192 DPRINTF(ATTR, ("\tchsize\n")); 1193 error = udf_chsize(vp, vap->va_size, cred); 1194 } 1195 1196 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1197 DPRINTF(ATTR, ("\tchown\n")); 1198 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1199 } 1200 1201 if (error == 0 && (vap->va_mode != VNOVAL)) { 1202 DPRINTF(ATTR, ("\tchmod\n")); 1203 error = udf_chmod(vp, vap->va_mode, cred); 1204 } 1205 1206 if (error == 0 && 1207 ((vap->va_atime.tv_sec != VNOVAL && 1208 vap->va_atime.tv_nsec != VNOVAL) || 1209 (vap->va_mtime.tv_sec != VNOVAL && 1210 vap->va_mtime.tv_nsec != VNOVAL)) 1211 ) { 1212 DPRINTF(ATTR, ("\tchtimes\n")); 1213 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1214 &vap->va_birthtime, vap->va_vaflags, cred); 1215 } 1216 VN_KNOTE(vp, NOTE_ATTRIB); 1217 1218 return error; 1219 } 1220 1221 /* --------------------------------------------------------------------- */ 1222 1223 /* 1224 * Return POSIX pathconf information for UDF file systems. 1225 */ 1226 int 1227 udf_pathconf(void *v) 1228 { 1229 struct vop_pathconf_args /* { 1230 struct vnode *a_vp; 1231 int a_name; 1232 register_t *a_retval; 1233 } */ *ap = v; 1234 uint32_t bits; 1235 1236 DPRINTF(CALL, ("udf_pathconf called\n")); 1237 1238 switch (ap->a_name) { 1239 case _PC_LINK_MAX: 1240 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1241 return 0; 1242 case _PC_NAME_MAX: 1243 *ap->a_retval = NAME_MAX; 1244 return 0; 1245 case _PC_PATH_MAX: 1246 *ap->a_retval = PATH_MAX; 1247 return 0; 1248 case _PC_PIPE_BUF: 1249 *ap->a_retval = PIPE_BUF; 1250 return 0; 1251 case _PC_CHOWN_RESTRICTED: 1252 *ap->a_retval = 1; 1253 return 0; 1254 case _PC_NO_TRUNC: 1255 *ap->a_retval = 1; 1256 return 0; 1257 case _PC_SYNC_IO: 1258 *ap->a_retval = 0; /* synchronised is off for performance */ 1259 return 0; 1260 case _PC_FILESIZEBITS: 1261 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1262 bits = 64; /* XXX ought to deliver 65 */ 1263 #if 0 1264 if (udf_node) 1265 bits = 64 * vp->v_mount->mnt_dev_bshift; 1266 #endif 1267 *ap->a_retval = bits; 1268 return 0; 1269 } 1270 1271 return EINVAL; 1272 } 1273 1274 1275 /* --------------------------------------------------------------------- */ 1276 1277 int 1278 udf_open(void *v) 1279 { 1280 struct vop_open_args /* { 1281 struct vnode *a_vp; 1282 int a_mode; 1283 kauth_cred_t a_cred; 1284 struct proc *a_p; 1285 } */ *ap = v; 1286 int flags; 1287 1288 DPRINTF(CALL, ("udf_open called\n")); 1289 1290 /* 1291 * Files marked append-only must be opened for appending. 1292 * TODO: get chflags(2) flags from extened attribute. 1293 */ 1294 flags = 0; 1295 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1296 return (EPERM); 1297 1298 return 0; 1299 } 1300 1301 1302 /* --------------------------------------------------------------------- */ 1303 1304 int 1305 udf_close(void *v) 1306 { 1307 struct vop_close_args /* { 1308 struct vnode *a_vp; 1309 int a_fflag; 1310 kauth_cred_t a_cred; 1311 struct proc *a_p; 1312 } */ *ap = v; 1313 struct vnode *vp = ap->a_vp; 1314 struct udf_node *udf_node = VTOI(vp); 1315 1316 DPRINTF(CALL, ("udf_close called\n")); 1317 udf_node = udf_node; /* shut up gcc */ 1318 1319 mutex_enter(&vp->v_interlock); 1320 if (vp->v_usecount > 1) { 1321 udf_itimes(udf_node, NULL, NULL, NULL); 1322 } 1323 mutex_exit(&vp->v_interlock); 1324 1325 return 0; 1326 } 1327 1328 1329 /* --------------------------------------------------------------------- */ 1330 1331 int 1332 udf_access(void *v) 1333 { 1334 struct vop_access_args /* { 1335 struct vnode *a_vp; 1336 int a_mode; 1337 kauth_cred_t a_cred; 1338 struct proc *a_p; 1339 } */ *ap = v; 1340 struct vnode *vp = ap->a_vp; 1341 mode_t mode = ap->a_mode; 1342 kauth_cred_t cred = ap->a_cred; 1343 /* struct udf_node *udf_node = VTOI(vp); */ 1344 struct vattr vap; 1345 int flags; 1346 int error; 1347 1348 DPRINTF(CALL, ("udf_access called\n")); 1349 1350 error = VOP_GETATTR(vp, &vap, NULL); 1351 if (error) 1352 return error; 1353 1354 /* check if we are allowed to write */ 1355 switch (vap.va_type) { 1356 case VDIR: 1357 case VLNK: 1358 case VREG: 1359 /* 1360 * normal nodes: check if we're on a read-only mounted 1361 * filingsystem and bomb out if we're trying to write. 1362 */ 1363 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1364 return EROFS; 1365 break; 1366 case VBLK: 1367 case VCHR: 1368 case VSOCK: 1369 case VFIFO: 1370 /* 1371 * special nodes: even on read-only mounted filingsystems 1372 * these are allowed to be written to if permissions allow. 1373 */ 1374 break; 1375 default: 1376 /* no idea what this is */ 1377 return EINVAL; 1378 } 1379 1380 /* noone may write immutable files */ 1381 /* TODO: get chflags(2) flags from extened attribute. */ 1382 flags = 0; 1383 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1384 return EPERM; 1385 1386 /* ask the generic vaccess to advice on security */ 1387 return vaccess(vp->v_type, 1388 vap.va_mode, vap.va_uid, vap.va_gid, 1389 mode, cred); 1390 } 1391 1392 /* --------------------------------------------------------------------- */ 1393 1394 int 1395 udf_create(void *v) 1396 { 1397 struct vop_create_args /* { 1398 struct vnode *a_dvp; 1399 struct vnode **a_vpp; 1400 struct componentname *a_cnp; 1401 struct vattr *a_vap; 1402 } */ *ap = v; 1403 struct vnode *dvp = ap->a_dvp; 1404 struct vnode **vpp = ap->a_vpp; 1405 struct vattr *vap = ap->a_vap; 1406 struct componentname *cnp = ap->a_cnp; 1407 int error; 1408 1409 DPRINTF(CALL, ("udf_create called\n")); 1410 error = udf_create_node(dvp, vpp, vap, cnp); 1411 1412 if (error || !(cnp->cn_flags & SAVESTART)) 1413 PNBUF_PUT(cnp->cn_pnbuf); 1414 vput(dvp); 1415 return error; 1416 } 1417 1418 /* --------------------------------------------------------------------- */ 1419 1420 int 1421 udf_mknod(void *v) 1422 { 1423 struct vop_mknod_args /* { 1424 struct vnode *a_dvp; 1425 struct vnode **a_vpp; 1426 struct componentname *a_cnp; 1427 struct vattr *a_vap; 1428 } */ *ap = v; 1429 struct vnode *dvp = ap->a_dvp; 1430 struct vnode **vpp = ap->a_vpp; 1431 struct vattr *vap = ap->a_vap; 1432 struct componentname *cnp = ap->a_cnp; 1433 int error; 1434 1435 DPRINTF(CALL, ("udf_mknod called\n")); 1436 error = udf_create_node(dvp, vpp, vap, cnp); 1437 1438 if (error || !(cnp->cn_flags & SAVESTART)) 1439 PNBUF_PUT(cnp->cn_pnbuf); 1440 vput(dvp); 1441 return error; 1442 } 1443 1444 /* --------------------------------------------------------------------- */ 1445 1446 int 1447 udf_mkdir(void *v) 1448 { 1449 struct vop_mkdir_args /* { 1450 struct vnode *a_dvp; 1451 struct vnode **a_vpp; 1452 struct componentname *a_cnp; 1453 struct vattr *a_vap; 1454 } */ *ap = v; 1455 struct vnode *dvp = ap->a_dvp; 1456 struct vnode **vpp = ap->a_vpp; 1457 struct vattr *vap = ap->a_vap; 1458 struct componentname *cnp = ap->a_cnp; 1459 int error; 1460 1461 DPRINTF(CALL, ("udf_mkdir called\n")); 1462 error = udf_create_node(dvp, vpp, vap, cnp); 1463 1464 if (error || !(cnp->cn_flags & SAVESTART)) 1465 PNBUF_PUT(cnp->cn_pnbuf); 1466 vput(dvp); 1467 return error; 1468 } 1469 1470 /* --------------------------------------------------------------------- */ 1471 1472 static int 1473 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1474 { 1475 struct udf_node *udf_node, *dir_node; 1476 struct vattr vap; 1477 int error; 1478 1479 DPRINTF(CALL, ("udf_link called\n")); 1480 error = 0; 1481 1482 /* some quick checks */ 1483 if (vp->v_type == VDIR) 1484 return EPERM; /* can't link a directory */ 1485 if (dvp->v_mount != vp->v_mount) 1486 return EXDEV; /* can't link across devices */ 1487 if (dvp == vp) 1488 return EPERM; /* can't be the same */ 1489 1490 /* lock node */ 1491 error = vn_lock(vp, LK_EXCLUSIVE); 1492 if (error) 1493 return error; 1494 1495 /* get attributes */ 1496 dir_node = VTOI(dvp); 1497 udf_node = VTOI(vp); 1498 1499 error = VOP_GETATTR(vp, &vap, FSCRED); 1500 if (error) 1501 return error; 1502 1503 /* check link count overflow */ 1504 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1505 return EMLINK; 1506 1507 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1508 } 1509 1510 int 1511 udf_link(void *v) 1512 { 1513 struct vop_link_args /* { 1514 struct vnode *a_dvp; 1515 struct vnode *a_vp; 1516 struct componentname *a_cnp; 1517 } */ *ap = v; 1518 struct vnode *dvp = ap->a_dvp; 1519 struct vnode *vp = ap->a_vp; 1520 struct componentname *cnp = ap->a_cnp; 1521 int error; 1522 1523 error = udf_do_link(dvp, vp, cnp); 1524 if (error) 1525 VOP_ABORTOP(dvp, cnp); 1526 1527 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1528 VOP_UNLOCK(vp, 0); 1529 1530 VN_KNOTE(vp, NOTE_LINK); 1531 VN_KNOTE(dvp, NOTE_WRITE); 1532 vput(dvp); 1533 1534 return error; 1535 } 1536 1537 /* --------------------------------------------------------------------- */ 1538 1539 static int 1540 udf_do_symlink(struct udf_node *udf_node, char *target) 1541 { 1542 struct pathcomp pathcomp; 1543 uint8_t *pathbuf, *pathpos, *compnamepos; 1544 char *mntonname; 1545 int pathlen, len, compnamelen, mntonnamelen; 1546 int error; 1547 1548 /* process `target' to an UDF structure */ 1549 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1550 pathpos = pathbuf; 1551 pathlen = 0; 1552 1553 if (*target == '/') { 1554 /* symlink starts from the root */ 1555 len = UDF_PATH_COMP_SIZE; 1556 memset(&pathcomp, 0, len); 1557 pathcomp.type = UDF_PATH_COMP_ROOT; 1558 1559 /* check if its mount-point relative! */ 1560 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1561 mntonnamelen = strlen(mntonname); 1562 if (strlen(target) >= mntonnamelen) { 1563 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1564 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1565 target += mntonnamelen; 1566 } 1567 } else { 1568 target++; 1569 } 1570 1571 memcpy(pathpos, &pathcomp, len); 1572 pathpos += len; 1573 pathlen += len; 1574 } 1575 1576 error = 0; 1577 while (*target) { 1578 /* ignore multiple '/' */ 1579 while (*target == '/') { 1580 target++; 1581 } 1582 if (!*target) 1583 break; 1584 1585 /* extract component name */ 1586 compnamelen = 0; 1587 compnamepos = target; 1588 while ((*target) && (*target != '/')) { 1589 target++; 1590 compnamelen++; 1591 } 1592 1593 /* just trunc if too long ?? (security issue) */ 1594 if (compnamelen >= 127) { 1595 error = ENAMETOOLONG; 1596 break; 1597 } 1598 1599 /* convert unix name to UDF name */ 1600 len = sizeof(struct pathcomp); 1601 memset(&pathcomp, 0, len); 1602 pathcomp.type = UDF_PATH_COMP_NAME; 1603 len = UDF_PATH_COMP_SIZE; 1604 1605 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1606 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1607 if ((compnamelen == 1) && (*compnamepos == '.')) 1608 pathcomp.type = UDF_PATH_COMP_CURDIR; 1609 1610 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1611 unix_to_udf_name( 1612 (char *) &pathcomp.ident, &pathcomp.l_ci, 1613 compnamepos, compnamelen, 1614 &udf_node->ump->logical_vol->desc_charset); 1615 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1616 } 1617 1618 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1619 error = ENAMETOOLONG; 1620 break; 1621 } 1622 1623 memcpy(pathpos, &pathcomp, len); 1624 pathpos += len; 1625 pathlen += len; 1626 } 1627 1628 if (error) { 1629 /* aparently too big */ 1630 free(pathbuf, M_UDFTEMP); 1631 return error; 1632 } 1633 1634 error = udf_grow_node(udf_node, pathlen); 1635 if (error) { 1636 /* failed to pregrow node */ 1637 free(pathbuf, M_UDFTEMP); 1638 return error; 1639 } 1640 1641 /* write out structure on the new file */ 1642 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1643 pathbuf, pathlen, 0, 1644 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1645 FSCRED, NULL, NULL); 1646 if (error) { 1647 /* failed to write out symlink contents */ 1648 free(pathbuf, M_UDFTEMP); 1649 return error; 1650 } 1651 1652 return 0; 1653 } 1654 1655 1656 int 1657 udf_symlink(void *v) 1658 { 1659 struct vop_symlink_args /* { 1660 struct vnode *a_dvp; 1661 struct vnode **a_vpp; 1662 struct componentname *a_cnp; 1663 struct vattr *a_vap; 1664 char *a_target; 1665 } */ *ap = v; 1666 struct vnode *dvp = ap->a_dvp; 1667 struct vnode **vpp = ap->a_vpp; 1668 struct vattr *vap = ap->a_vap; 1669 struct componentname *cnp = ap->a_cnp; 1670 struct udf_node *dir_node; 1671 struct udf_node *udf_node; 1672 int error; 1673 1674 DPRINTF(CALL, ("udf_symlink called\n")); 1675 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1676 error = udf_create_node(dvp, vpp, vap, cnp); 1677 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1678 if (!error) { 1679 dir_node = VTOI(dvp); 1680 udf_node = VTOI(*vpp); 1681 KASSERT(udf_node); 1682 error = udf_do_symlink(udf_node, ap->a_target); 1683 if (error) { 1684 /* remove node */ 1685 udf_shrink_node(udf_node, 0); 1686 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1687 } 1688 } 1689 if (error || !(cnp->cn_flags & SAVESTART)) 1690 PNBUF_PUT(cnp->cn_pnbuf); 1691 vput(dvp); 1692 return error; 1693 } 1694 1695 /* --------------------------------------------------------------------- */ 1696 1697 int 1698 udf_readlink(void *v) 1699 { 1700 struct vop_readlink_args /* { 1701 struct vnode *a_vp; 1702 struct uio *a_uio; 1703 kauth_cred_t a_cred; 1704 } */ *ap = v; 1705 struct vnode *vp = ap->a_vp; 1706 struct uio *uio = ap->a_uio; 1707 kauth_cred_t cred = ap->a_cred; 1708 struct udf_node *udf_node; 1709 struct pathcomp pathcomp; 1710 struct vattr vattr; 1711 uint8_t *pathbuf, *targetbuf, *tmpname; 1712 uint8_t *pathpos, *targetpos; 1713 char *mntonname; 1714 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1715 int first, error; 1716 1717 DPRINTF(CALL, ("udf_readlink called\n")); 1718 1719 udf_node = VTOI(vp); 1720 error = VOP_GETATTR(vp, &vattr, cred); 1721 if (error) 1722 return error; 1723 1724 /* claim temporary buffers for translation */ 1725 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1726 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1727 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1728 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1729 memset(targetbuf, 0, PATH_MAX); 1730 1731 /* read contents of file in our temporary buffer */ 1732 error = vn_rdwr(UIO_READ, udf_node->vnode, 1733 pathbuf, vattr.va_size, 0, 1734 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1735 FSCRED, NULL, NULL); 1736 if (error) { 1737 /* failed to read in symlink contents */ 1738 free(pathbuf, M_UDFTEMP); 1739 free(targetbuf, M_UDFTEMP); 1740 free(tmpname, M_UDFTEMP); 1741 return error; 1742 } 1743 1744 /* convert to a unix path */ 1745 pathpos = pathbuf; 1746 pathlen = 0; 1747 targetpos = targetbuf; 1748 targetlen = PATH_MAX; 1749 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1750 mntonnamelen = strlen(mntonname); 1751 1752 error = 0; 1753 first = 1; 1754 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1755 len = UDF_PATH_COMP_SIZE; 1756 memcpy(&pathcomp, pathpos, len); 1757 l_ci = pathcomp.l_ci; 1758 switch (pathcomp.type) { 1759 case UDF_PATH_COMP_ROOT : 1760 if (l_ci || (targetlen < 1) || !first) { 1761 error = EINVAL; 1762 break; 1763 } 1764 *targetpos++ = '/'; targetlen--; 1765 break; 1766 case UDF_PATH_COMP_MOUNTROOT : 1767 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1768 error = EINVAL; 1769 break; 1770 } 1771 memcpy(targetpos, mntonname, mntonnamelen); 1772 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1773 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1774 /* more follows, so must be directory */ 1775 *targetpos++ = '/'; targetlen--; 1776 } 1777 break; 1778 case UDF_PATH_COMP_PARENTDIR : 1779 if (l_ci || (targetlen < 3)) { 1780 error = EINVAL; 1781 break; 1782 } 1783 *targetpos++ = '.'; targetlen--; 1784 *targetpos++ = '.'; targetlen--; 1785 *targetpos++ = '/'; targetlen--; 1786 break; 1787 case UDF_PATH_COMP_CURDIR : 1788 if (l_ci || (targetlen < 2)) { 1789 error = EINVAL; 1790 break; 1791 } 1792 *targetpos++ = '.'; targetlen--; 1793 *targetpos++ = '/'; targetlen--; 1794 break; 1795 case UDF_PATH_COMP_NAME : 1796 memset(tmpname, 0, PATH_MAX); 1797 memcpy(&pathcomp, pathpos, len + l_ci); 1798 udf_to_unix_name(tmpname, MAXPATHLEN, 1799 pathcomp.ident, l_ci, 1800 &udf_node->ump->logical_vol->desc_charset); 1801 namelen = strlen(tmpname); 1802 if (targetlen < namelen + 1) { 1803 error = EINVAL; 1804 break; 1805 } 1806 memcpy(targetpos, tmpname, namelen); 1807 targetpos += namelen; targetlen -= namelen; 1808 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1809 /* more follows, so must be directory */ 1810 *targetpos++ = '/'; targetlen--; 1811 } 1812 break; 1813 default : 1814 error = EINVAL; 1815 break; 1816 } 1817 first = 0; 1818 if (error) 1819 break; 1820 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1821 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1822 1823 } 1824 /* all processed? */ 1825 if (vattr.va_size - pathlen > 0) 1826 error = EINVAL; 1827 1828 /* uiomove() to destination */ 1829 if (!error) 1830 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1831 1832 free(pathbuf, M_UDFTEMP); 1833 free(targetbuf, M_UDFTEMP); 1834 free(tmpname, M_UDFTEMP); 1835 1836 return error; 1837 } 1838 1839 /* --------------------------------------------------------------------- */ 1840 1841 /* note: i tried to follow the logics of the tmpfs rename code */ 1842 int 1843 udf_rename(void *v) 1844 { 1845 struct vop_rename_args /* { 1846 struct vnode *a_fdvp; 1847 struct vnode *a_fvp; 1848 struct componentname *a_fcnp; 1849 struct vnode *a_tdvp; 1850 struct vnode *a_tvp; 1851 struct componentname *a_tcnp; 1852 } */ *ap = v; 1853 struct vnode *tvp = ap->a_tvp; 1854 struct vnode *tdvp = ap->a_tdvp; 1855 struct vnode *fvp = ap->a_fvp; 1856 struct vnode *fdvp = ap->a_fdvp; 1857 struct componentname *tcnp = ap->a_tcnp; 1858 struct componentname *fcnp = ap->a_fcnp; 1859 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1860 struct vattr vap; 1861 int error; 1862 1863 DPRINTF(CALL, ("udf_rename called\n")); 1864 1865 /* disallow cross-device renames */ 1866 if (fvp->v_mount != tdvp->v_mount || 1867 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1868 error = EXDEV; 1869 goto out_unlocked; 1870 } 1871 1872 fnode = VTOI(fvp); 1873 fdnode = VTOI(fdvp); 1874 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1875 tdnode = VTOI(tdvp); 1876 1877 /* dont allow directories for now */ 1878 if (fvp->v_type == VDIR) { 1879 error = EINVAL; 1880 goto out_unlocked; 1881 } 1882 1883 /* do we need to delete the old entry? */ 1884 if (tvp) 1885 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1886 1887 /* create new directory entry */ 1888 error = VOP_GETATTR(fvp, &vap, FSCRED); 1889 KASSERT(error == 0); 1890 1891 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &vap, tcnp); 1892 if (error) 1893 goto out_unlocked; 1894 1895 /* unlink old directory entry */ 1896 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1897 if (error) 1898 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1899 1900 #if 0 1901 out: 1902 if (fdnode != tdnode) 1903 VOP_UNLOCK(fdvp, 0); 1904 #endif 1905 1906 out_unlocked: 1907 VOP_ABORTOP(tdvp, tcnp); 1908 if (tdvp == tvp) 1909 vrele(tdvp); 1910 else 1911 vput(tdvp); 1912 if (tvp) 1913 vput(tvp); 1914 VOP_ABORTOP(fdvp, fcnp); 1915 1916 /* release source nodes. */ 1917 vrele(fdvp); 1918 vrele(fvp); 1919 1920 return error; 1921 } 1922 1923 /* --------------------------------------------------------------------- */ 1924 1925 int 1926 udf_remove(void *v) 1927 { 1928 struct vop_remove_args /* { 1929 struct vnode *a_dvp; 1930 struct vnode *a_vp; 1931 struct componentname *a_cnp; 1932 } */ *ap = v; 1933 struct vnode *dvp = ap->a_dvp; 1934 struct vnode *vp = ap->a_vp; 1935 struct componentname *cnp = ap->a_cnp; 1936 struct udf_node *dir_node = VTOI(dvp);; 1937 struct udf_node *udf_node = VTOI(vp); 1938 struct udf_mount *ump = dir_node->ump; 1939 int error; 1940 1941 DPRINTF(CALL, ("udf_remove called\n")); 1942 if (vp->v_type != VDIR) { 1943 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1944 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1945 } else { 1946 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1947 error = EPERM; 1948 } 1949 1950 if (error == 0) { 1951 VN_KNOTE(vp, NOTE_DELETE); 1952 VN_KNOTE(dvp, NOTE_WRITE); 1953 } 1954 1955 if (dvp == vp) 1956 vrele(vp); 1957 else 1958 vput(vp); 1959 vput(dvp); 1960 1961 return error; 1962 } 1963 1964 /* --------------------------------------------------------------------- */ 1965 1966 int 1967 udf_rmdir(void *v) 1968 { 1969 struct vop_rmdir_args /* { 1970 struct vnode *a_dvp; 1971 struct vnode *a_vp; 1972 struct componentname *a_cnp; 1973 } */ *ap = v; 1974 struct vnode *vp = ap->a_vp; 1975 struct vnode *dvp = ap->a_dvp; 1976 struct componentname *cnp = ap->a_cnp; 1977 struct udf_node *dir_node = VTOI(dvp);; 1978 struct udf_node *udf_node = VTOI(vp); 1979 struct udf_mount *ump = dir_node->ump; 1980 int refcnt, error; 1981 1982 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 1983 1984 /* don't allow '.' to be deleted */ 1985 if (dir_node == udf_node) { 1986 vrele(dvp); 1987 vput(vp); 1988 return EINVAL; 1989 } 1990 1991 /* check to see if the directory is empty */ 1992 error = 0; 1993 if (dir_node->fe) { 1994 refcnt = udf_rw16(udf_node->fe->link_cnt); 1995 } else { 1996 refcnt = udf_rw16(udf_node->efe->link_cnt); 1997 } 1998 if (refcnt > 1) { 1999 /* NOT empty */ 2000 vput(dvp); 2001 vput(vp); 2002 return ENOTEMPTY; 2003 } 2004 2005 /* detach the node from the directory */ 2006 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2007 if (error == 0) { 2008 cache_purge(vp); 2009 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2010 VN_KNOTE(vp, NOTE_DELETE); 2011 } 2012 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2013 2014 /* unput the nodes and exit */ 2015 vput(dvp); 2016 vput(vp); 2017 2018 return error; 2019 } 2020 2021 /* --------------------------------------------------------------------- */ 2022 2023 int 2024 udf_fsync(void *v) 2025 { 2026 struct vop_fsync_args /* { 2027 struct vnode *a_vp; 2028 kauth_cred_t a_cred; 2029 int a_flags; 2030 off_t offlo; 2031 off_t offhi; 2032 struct proc *a_p; 2033 } */ *ap = v; 2034 struct vnode *vp = ap->a_vp; 2035 struct udf_node *udf_node = VTOI(vp); 2036 int error, flags, wait; 2037 2038 DPRINTF(STRATEGY, ("udf_fsync called : %s, %s\n", 2039 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2040 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2041 2042 /* flush data and wait for it when requested */ 2043 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2044 vflushbuf(vp, wait); 2045 2046 /* set our times */ 2047 udf_itimes(udf_node, NULL, NULL, NULL); 2048 2049 /* if called when mounted readonly, never write back */ 2050 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2051 return 0; 2052 2053 /* if only data is requested, return */ 2054 if (ap->a_flags & FSYNC_DATAONLY) 2055 return 0; 2056 2057 /* check if the node is dirty 'enough'*/ 2058 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2059 if (flags == 0) 2060 return 0; 2061 2062 /* if we don't have to wait, check for IO pending */ 2063 if (!wait) { 2064 if (vp->v_numoutput > 0) { 2065 DPRINTF(NODE, ("udf_fsync: rejecting on v_numoutput\n")); 2066 return 0; 2067 } 2068 if (udf_node->outstanding_bufs > 0) { 2069 DPRINTF(NODE, ("udf_fsync: rejecting on outstanding_bufs\n")); 2070 return 0; 2071 } 2072 if (udf_node->outstanding_nodedscr > 0) { 2073 DPRINTF(NODE, ("udf_fsync: rejecting on outstanding_nodedscr\n")); 2074 return 0; 2075 } 2076 } 2077 2078 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2079 if (wait) { 2080 DPRINTF(SYNC, ("udf_fsync, waiting\n")); 2081 mutex_enter(&vp->v_interlock); 2082 while (vp->v_numoutput) { 2083 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2084 } 2085 mutex_exit(&vp->v_interlock); 2086 DPRINTF(SYNC, ("udf_fsync: fin wait\n")); 2087 } 2088 2089 /* write out node and wait for it if requested */ 2090 error = udf_writeout_node(udf_node, wait); 2091 if (error) 2092 return error; 2093 2094 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2095 2096 return 0; 2097 } 2098 2099 /* --------------------------------------------------------------------- */ 2100 2101 int 2102 udf_advlock(void *v) 2103 { 2104 struct vop_advlock_args /* { 2105 struct vnode *a_vp; 2106 void *a_id; 2107 int a_op; 2108 struct flock *a_fl; 2109 int a_flags; 2110 } */ *ap = v; 2111 struct vnode *vp = ap->a_vp; 2112 struct udf_node *udf_node = VTOI(vp); 2113 struct file_entry *fe; 2114 struct extfile_entry *efe; 2115 uint64_t file_size; 2116 2117 DPRINTF(LOCKING, ("udf_advlock called\n")); 2118 2119 /* get directory filesize */ 2120 if (udf_node->fe) { 2121 fe = udf_node->fe; 2122 file_size = udf_rw64(fe->inf_len); 2123 } else { 2124 assert(udf_node->efe); 2125 efe = udf_node->efe; 2126 file_size = udf_rw64(efe->inf_len); 2127 } 2128 2129 return lf_advlock(ap, &udf_node->lockf, file_size); 2130 } 2131 2132 /* --------------------------------------------------------------------- */ 2133 2134 2135 /* Global vfs vnode data structures for udfs */ 2136 int (**udf_vnodeop_p) __P((void *)); 2137 2138 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2139 { &vop_default_desc, vn_default_error }, 2140 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2141 { &vop_create_desc, udf_create }, /* create */ 2142 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2143 { &vop_open_desc, udf_open }, /* open */ 2144 { &vop_close_desc, udf_close }, /* close */ 2145 { &vop_access_desc, udf_access }, /* access */ 2146 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2147 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2148 { &vop_read_desc, udf_read }, /* read */ 2149 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2150 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2151 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2152 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2153 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2154 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2155 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2156 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2157 { &vop_seek_desc, genfs_seek }, /* seek */ 2158 { &vop_remove_desc, udf_remove }, /* remove */ 2159 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2160 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2161 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2162 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2163 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2164 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2165 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2166 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2167 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2168 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2169 { &vop_lock_desc, genfs_lock }, /* lock */ 2170 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2171 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2172 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2173 /* { &vop_print_desc, udf_print }, */ /* print */ 2174 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2175 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2176 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2177 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2178 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2179 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2180 { NULL, NULL } 2181 }; 2182 2183 2184 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2185 &udf_vnodeop_p, udf_vnodeop_entries 2186 }; 2187 2188