udf_vnops.c revision 1.86
1 /* $NetBSD: udf_vnops.c,v 1.86 2013/10/04 08:35:08 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Generic parts are derived from software contributed to The NetBSD Foundation 28 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 29 * 2005 program. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __KERNEL_RCSID(0, "$NetBSD: udf_vnops.c,v 1.86 2013/10/04 08:35:08 hannken Exp $"); 36 #endif /* not lint */ 37 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 43 #include <sys/kernel.h> 44 #include <sys/file.h> /* define FWRITE ... */ 45 #include <sys/stat.h> 46 #include <sys/buf.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/lockf.h> 54 #include <sys/kauth.h> 55 56 #include <miscfs/genfs/genfs.h> 57 #include <uvm/uvm_extern.h> 58 59 #include <fs/udf/ecma167-udf.h> 60 #include <fs/udf/udf_mount.h> 61 #include <sys/dirhash.h> 62 63 #include "udf.h" 64 #include "udf_subr.h" 65 #include "udf_bswap.h" 66 67 68 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data) 69 70 71 /* externs */ 72 extern int prtactive; 73 74 /* implementations of vnode functions; table follows at end */ 75 /* --------------------------------------------------------------------- */ 76 77 int 78 udf_inactive(void *v) 79 { 80 struct vop_inactive_args /* { 81 struct vnode *a_vp; 82 bool *a_recycle; 83 } */ *ap = v; 84 struct vnode *vp = ap->a_vp; 85 struct udf_node *udf_node = VTOI(vp); 86 int refcnt; 87 88 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 89 90 if (udf_node == NULL) { 91 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 92 VOP_UNLOCK(vp); 93 return 0; 94 } 95 96 /* 97 * Optionally flush metadata to disc. If the file has not been 98 * referenced anymore in a directory we ought to free up the resources 99 * on disc if applicable. 100 */ 101 if (udf_node->fe) { 102 refcnt = udf_rw16(udf_node->fe->link_cnt); 103 } else { 104 assert(udf_node->efe); 105 refcnt = udf_rw16(udf_node->efe->link_cnt); 106 } 107 108 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 109 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 110 /* system nodes are not writen out on inactive, so flush */ 111 udf_node->i_flags = 0; 112 } 113 114 *ap->a_recycle = false; 115 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 116 /* remove this file's allocation */ 117 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 118 *ap->a_recycle = true; 119 udf_delete_node(udf_node); 120 VOP_UNLOCK(vp); 121 return 0; 122 } 123 124 /* write out its node */ 125 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 126 udf_update(vp, NULL, NULL, NULL, 0); 127 VOP_UNLOCK(vp); 128 129 return 0; 130 } 131 132 /* --------------------------------------------------------------------- */ 133 134 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 135 136 int 137 udf_reclaim(void *v) 138 { 139 struct vop_reclaim_args /* { 140 struct vnode *a_vp; 141 } */ *ap = v; 142 struct vnode *vp = ap->a_vp; 143 struct udf_node *udf_node = VTOI(vp); 144 145 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 146 if (prtactive && vp->v_usecount > 1) 147 vprint("udf_reclaim(): pushing active", vp); 148 149 if (udf_node == NULL) { 150 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 151 return 0; 152 } 153 154 /* update note for closure */ 155 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 156 157 /* async check to see if all node descriptors are written out */ 158 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 159 vprint("udf_reclaim(): waiting for writeout\n", vp); 160 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 161 } 162 163 /* dispose all node knowledge */ 164 udf_dispose_node(udf_node); 165 166 return 0; 167 } 168 169 /* --------------------------------------------------------------------- */ 170 171 int 172 udf_read(void *v) 173 { 174 struct vop_read_args /* { 175 struct vnode *a_vp; 176 struct uio *a_uio; 177 int a_ioflag; 178 kauth_cred_t a_cred; 179 } */ *ap = v; 180 struct vnode *vp = ap->a_vp; 181 struct uio *uio = ap->a_uio; 182 int ioflag = ap->a_ioflag; 183 int advice = IO_ADV_DECODE(ap->a_ioflag); 184 struct uvm_object *uobj; 185 struct udf_node *udf_node = VTOI(vp); 186 struct file_entry *fe; 187 struct extfile_entry *efe; 188 uint64_t file_size; 189 vsize_t len; 190 int error; 191 192 /* 193 * XXX reading from extended attributes not yet implemented. FreeBSD 194 * has it in mind to forward the IO_EXT read call to the 195 * VOP_READEXTATTR(). 196 */ 197 198 DPRINTF(READ, ("udf_read called\n")); 199 200 /* can this happen? some filingsystems have this check */ 201 if (uio->uio_offset < 0) 202 return EINVAL; 203 if (uio->uio_resid == 0) 204 return 0; 205 206 /* protect against rogue programs reading raw directories and links */ 207 if ((ioflag & IO_ALTSEMANTICS) == 0) { 208 if (vp->v_type == VDIR) 209 return EISDIR; 210 /* all but regular files just give EINVAL */ 211 if (vp->v_type != VREG) 212 return EINVAL; 213 } 214 215 assert(udf_node); 216 assert(udf_node->fe || udf_node->efe); 217 218 /* get file/directory filesize */ 219 if (udf_node->fe) { 220 fe = udf_node->fe; 221 file_size = udf_rw64(fe->inf_len); 222 } else { 223 assert(udf_node->efe); 224 efe = udf_node->efe; 225 file_size = udf_rw64(efe->inf_len); 226 } 227 228 /* read contents using buffercache */ 229 uobj = &vp->v_uobj; 230 error = 0; 231 while (uio->uio_resid > 0) { 232 /* reached end? */ 233 if (file_size <= uio->uio_offset) 234 break; 235 236 /* maximise length to file extremity */ 237 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 238 if (len == 0) 239 break; 240 241 /* ubc, here we come, prepare to trap */ 242 error = ubc_uiomove(uobj, uio, len, advice, 243 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 244 if (error) 245 break; 246 } 247 248 /* note access time unless not requested */ 249 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 250 udf_node->i_flags |= IN_ACCESS; 251 if ((ioflag & IO_SYNC) == IO_SYNC) 252 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 253 } 254 255 return error; 256 } 257 258 /* --------------------------------------------------------------------- */ 259 260 int 261 udf_write(void *v) 262 { 263 struct vop_write_args /* { 264 struct vnode *a_vp; 265 struct uio *a_uio; 266 int a_ioflag; 267 kauth_cred_t a_cred; 268 } */ *ap = v; 269 struct vnode *vp = ap->a_vp; 270 struct uio *uio = ap->a_uio; 271 int ioflag = ap->a_ioflag; 272 kauth_cred_t cred = ap->a_cred; 273 int advice = IO_ADV_DECODE(ap->a_ioflag); 274 struct uvm_object *uobj; 275 struct udf_node *udf_node = VTOI(vp); 276 struct file_entry *fe; 277 struct extfile_entry *efe; 278 uint64_t file_size, old_size, old_offset; 279 vsize_t len; 280 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 281 int error; 282 int resid, extended; 283 284 /* 285 * XXX writing to extended attributes not yet implemented. FreeBSD has 286 * it in mind to forward the IO_EXT read call to the 287 * VOP_READEXTATTR(). 288 */ 289 290 DPRINTF(WRITE, ("udf_write called\n")); 291 292 /* can this happen? some filingsystems have this check */ 293 if (uio->uio_offset < 0) 294 return EINVAL; 295 if (uio->uio_resid == 0) 296 return 0; 297 298 /* protect against rogue programs writing raw directories or links */ 299 if ((ioflag & IO_ALTSEMANTICS) == 0) { 300 if (vp->v_type == VDIR) 301 return EISDIR; 302 /* all but regular files just give EINVAL for now */ 303 if (vp->v_type != VREG) 304 return EINVAL; 305 } 306 307 assert(udf_node); 308 assert(udf_node->fe || udf_node->efe); 309 310 /* get file/directory filesize */ 311 if (udf_node->fe) { 312 fe = udf_node->fe; 313 file_size = udf_rw64(fe->inf_len); 314 } else { 315 assert(udf_node->efe); 316 efe = udf_node->efe; 317 file_size = udf_rw64(efe->inf_len); 318 } 319 old_size = file_size; 320 321 /* if explicitly asked to append, uio_offset can be wrong? */ 322 if (ioflag & IO_APPEND) 323 uio->uio_offset = file_size; 324 325 extended = (uio->uio_offset + uio->uio_resid > file_size); 326 if (extended) { 327 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 328 file_size, uio->uio_offset + uio->uio_resid)); 329 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 330 if (error) 331 return error; 332 file_size = uio->uio_offset + uio->uio_resid; 333 } 334 335 /* write contents using buffercache */ 336 uobj = &vp->v_uobj; 337 resid = uio->uio_resid; 338 error = 0; 339 340 uvm_vnp_setwritesize(vp, file_size); 341 old_offset = uio->uio_offset; 342 while (uio->uio_resid > 0) { 343 /* maximise length to file extremity */ 344 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 345 if (len == 0) 346 break; 347 348 genfs_node_wrlock(vp); 349 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 350 genfs_node_unlock(vp); 351 if (error) 352 break; 353 354 /* ubc, here we come, prepare to trap */ 355 error = ubc_uiomove(uobj, uio, len, advice, 356 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 357 if (error) 358 break; 359 360 /* 361 * flush what we just wrote if necessary. 362 * XXXUBC simplistic async flushing. 363 * 364 * Directories are excluded since its file data that we want 365 * to purge. 366 */ 367 if ((vp->v_type != VDIR) && 368 (old_offset >> 16 != uio->uio_offset >> 16)) { 369 mutex_enter(vp->v_interlock); 370 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 371 (uio->uio_offset >> 16) << 16, 372 PGO_CLEANIT | PGO_LAZY); 373 old_offset = uio->uio_offset; 374 } 375 } 376 uvm_vnp_setsize(vp, file_size); 377 378 /* mark node changed and request update */ 379 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 380 if (vp->v_mount->mnt_flag & MNT_RELATIME) 381 udf_node->i_flags |= IN_ACCESS; 382 383 /* 384 * XXX TODO FFS has code here to reset setuid & setgid when we're not 385 * the superuser as a precaution against tampering. 386 */ 387 388 /* if we wrote a thing, note write action on vnode */ 389 if (resid > uio->uio_resid) 390 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 391 392 if (error) { 393 /* bring back file size to its former size */ 394 /* take notice of its errors? */ 395 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 396 397 /* roll back uio */ 398 uio->uio_offset -= resid - uio->uio_resid; 399 uio->uio_resid = resid; 400 } else { 401 /* if we write and we're synchronous, update node */ 402 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 403 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 404 } 405 406 return error; 407 } 408 409 410 /* --------------------------------------------------------------------- */ 411 412 /* 413 * `Special' bmap functionality that translates all incomming requests to 414 * translate to vop_strategy() calls with the same blocknumbers effectively 415 * not translating at all. 416 */ 417 418 int 419 udf_trivial_bmap(void *v) 420 { 421 struct vop_bmap_args /* { 422 struct vnode *a_vp; 423 daddr_t a_bn; 424 struct vnode **a_vpp; 425 daddr_t *a_bnp; 426 int *a_runp; 427 } */ *ap = v; 428 struct vnode *vp = ap->a_vp; /* our node */ 429 struct vnode **vpp = ap->a_vpp; /* return node */ 430 daddr_t *bnp = ap->a_bnp; /* translated */ 431 daddr_t bn = ap->a_bn; /* origional */ 432 int *runp = ap->a_runp; 433 struct udf_node *udf_node = VTOI(vp); 434 uint32_t lb_size; 435 436 /* get logical block size */ 437 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 438 439 /* could return `-1' to indicate holes/zeros */ 440 /* translate 1:1 */ 441 *bnp = bn; 442 443 /* set the vnode to read the data from with strategy on itself */ 444 if (vpp) 445 *vpp = vp; 446 447 /* set runlength of maximum block size */ 448 if (runp) 449 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 450 451 /* return success */ 452 return 0; 453 } 454 455 /* --------------------------------------------------------------------- */ 456 457 int 458 udf_vfsstrategy(void *v) 459 { 460 struct vop_strategy_args /* { 461 struct vnode *a_vp; 462 struct buf *a_bp; 463 } */ *ap = v; 464 struct vnode *vp = ap->a_vp; 465 struct buf *bp = ap->a_bp; 466 struct udf_node *udf_node = VTOI(vp); 467 uint32_t lb_size, from, sectors; 468 int error; 469 470 DPRINTF(STRATEGY, ("udf_strategy called\n")); 471 472 /* check if we ought to be here */ 473 if (vp->v_type == VBLK || vp->v_type == VCHR) 474 panic("udf_strategy: spec"); 475 476 /* only filebuffers ought to be read/write by this, no descriptors */ 477 assert(bp->b_blkno >= 0); 478 479 /* get sector size */ 480 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 481 482 /* calculate sector to start from */ 483 from = bp->b_blkno; 484 485 /* calculate length to fetch/store in sectors */ 486 sectors = bp->b_bcount / lb_size; 487 assert(bp->b_bcount > 0); 488 489 /* NEVER assume later that this buffer is already translated */ 490 /* bp->b_lblkno = bp->b_blkno; */ 491 492 /* check assertions: we OUGHT to always get multiples of this */ 493 assert(sectors * lb_size == bp->b_bcount); 494 495 /* issue buffer */ 496 error = 0; 497 if (bp->b_flags & B_READ) { 498 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 499 ", sector %d for %d sectors\n", 500 vp, bp, bp->b_blkno, from, sectors)); 501 502 /* read buffer from the udf_node, translate vtop on the way*/ 503 udf_read_filebuf(udf_node, bp); 504 } else { 505 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 506 ", sector %d for %d sectors\n", 507 vp, bp, bp->b_blkno, from, sectors)); 508 509 /* write buffer to the udf_node, translate vtop on the way*/ 510 udf_write_filebuf(udf_node, bp); 511 } 512 513 return bp->b_error; 514 } 515 516 /* --------------------------------------------------------------------- */ 517 518 int 519 udf_readdir(void *v) 520 { 521 struct vop_readdir_args /* { 522 struct vnode *a_vp; 523 struct uio *a_uio; 524 kauth_cred_t a_cred; 525 int *a_eofflag; 526 off_t **a_cookies; 527 int *a_ncookies; 528 } */ *ap = v; 529 struct uio *uio = ap->a_uio; 530 struct vnode *vp = ap->a_vp; 531 struct udf_node *udf_node = VTOI(vp); 532 struct file_entry *fe; 533 struct extfile_entry *efe; 534 struct fileid_desc *fid; 535 struct dirent *dirent; 536 uint64_t file_size, diroffset, transoffset; 537 uint32_t lb_size; 538 int error; 539 540 DPRINTF(READDIR, ("udf_readdir called\n")); 541 542 /* This operation only makes sense on directory nodes. */ 543 if (vp->v_type != VDIR) 544 return ENOTDIR; 545 546 /* get directory filesize */ 547 if (udf_node->fe) { 548 fe = udf_node->fe; 549 file_size = udf_rw64(fe->inf_len); 550 } else { 551 assert(udf_node->efe); 552 efe = udf_node->efe; 553 file_size = udf_rw64(efe->inf_len); 554 } 555 556 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 557 558 /* 559 * Add `.' pseudo entry if at offset zero since its not in the fid 560 * stream 561 */ 562 if (uio->uio_offset == 0) { 563 DPRINTF(READDIR, ("\t'.' inserted\n")); 564 strcpy(dirent->d_name, "."); 565 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 566 dirent->d_type = DT_DIR; 567 dirent->d_namlen = strlen(dirent->d_name); 568 dirent->d_reclen = _DIRENT_SIZE(dirent); 569 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 570 571 /* mark with magic value that we have done the dummy */ 572 uio->uio_offset = UDF_DIRCOOKIE_DOT; 573 } 574 575 /* we are called just as long as we keep on pushing data in */ 576 error = 0; 577 if (uio->uio_offset < file_size) { 578 /* allocate temporary space for fid */ 579 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 580 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 581 582 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 583 uio->uio_offset = 0; 584 585 diroffset = uio->uio_offset; 586 transoffset = diroffset; 587 while (diroffset < file_size) { 588 DPRINTF(READDIR, ("\tread in fid stream\n")); 589 /* transfer a new fid/dirent */ 590 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 591 DPRINTFIF(READDIR, error, ("read error in read fid " 592 "stream : %d\n", error)); 593 if (error) 594 break; 595 596 /* 597 * If there isn't enough space in the uio to return a 598 * whole dirent, break off read 599 */ 600 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 601 break; 602 603 /* remember the last entry we transfered */ 604 transoffset = diroffset; 605 606 /* skip deleted entries */ 607 if (fid->file_char & UDF_FILE_CHAR_DEL) 608 continue; 609 610 /* skip not visible files */ 611 if (fid->file_char & UDF_FILE_CHAR_VIS) 612 continue; 613 614 /* copy dirent to the caller */ 615 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 616 dirent->d_name, dirent->d_type)); 617 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 618 } 619 620 /* pass on last transfered offset */ 621 uio->uio_offset = transoffset; 622 free(fid, M_UDFTEMP); 623 } 624 625 if (ap->a_eofflag) 626 *ap->a_eofflag = (uio->uio_offset >= file_size); 627 628 #ifdef DEBUG 629 if (udf_verbose & UDF_DEBUG_READDIR) { 630 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 631 if (ap->a_eofflag) 632 printf("returning EOF ? %d\n", *ap->a_eofflag); 633 if (error) 634 printf("readdir returning error %d\n", error); 635 } 636 #endif 637 638 free(dirent, M_UDFTEMP); 639 return error; 640 } 641 642 /* --------------------------------------------------------------------- */ 643 644 int 645 udf_lookup(void *v) 646 { 647 struct vop_lookup_args /* { 648 struct vnode *a_dvp; 649 struct vnode **a_vpp; 650 struct componentname *a_cnp; 651 } */ *ap = v; 652 struct vnode *dvp = ap->a_dvp; 653 struct vnode **vpp = ap->a_vpp; 654 struct componentname *cnp = ap->a_cnp; 655 struct udf_node *dir_node, *res_node; 656 struct udf_mount *ump; 657 struct long_ad icb_loc; 658 mode_t mode; 659 uid_t d_uid; 660 gid_t d_gid; 661 const char *name; 662 int namelen, nameiop, islastcn, mounted_ro; 663 int error, found; 664 665 dir_node = VTOI(dvp); 666 ump = dir_node->ump; 667 *vpp = NULL; 668 669 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 670 cnp->cn_nameptr)); 671 672 /* simplify/clarification flags */ 673 nameiop = cnp->cn_nameiop; 674 islastcn = cnp->cn_flags & ISLASTCN; 675 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 676 677 /* check exec/dirread permissions first */ 678 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 679 if (error) 680 return error; 681 682 DPRINTF(LOOKUP, ("\taccess ok\n")); 683 684 /* 685 * If requesting a modify on the last path element on a read-only 686 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 687 */ 688 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 689 return EROFS; 690 691 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 692 cnp->cn_nameptr)); 693 /* look in the namecache */ 694 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 695 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 696 return *vpp == NULLVP ? ENOENT : 0; 697 } 698 699 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 700 701 /* 702 * Obviously, the file is not (anymore) in the namecache, we have to 703 * search for it. There are three basic cases: '.', '..' and others. 704 * 705 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 706 */ 707 error = 0; 708 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 709 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 710 /* special case 1 '.' */ 711 if (islastcn && cnp->cn_nameiop == RENAME) { 712 error = EISDIR; 713 goto out; 714 } 715 vref(dvp); 716 *vpp = dvp; 717 /* done */ 718 goto done; 719 } else if (cnp->cn_flags & ISDOTDOT) { 720 /* special case 2 '..' */ 721 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 722 723 if (islastcn && cnp->cn_nameiop == RENAME) { 724 error = EINVAL; 725 goto out; 726 } 727 728 /* get our node */ 729 name = ".."; 730 namelen = 2; 731 error = udf_lookup_name_in_dir(dvp, name, namelen, 732 &icb_loc, &found); 733 if (error) 734 goto out; 735 if (!found) 736 error = ENOENT; 737 738 /* first unlock parent */ 739 VOP_UNLOCK(dvp); 740 741 if (error == 0) { 742 DPRINTF(LOOKUP, ("\tfound '..'\n")); 743 /* try to create/reuse the node */ 744 error = udf_get_node(ump, &icb_loc, &res_node); 745 746 if (!error) { 747 DPRINTF(LOOKUP, 748 ("\tnode retrieved/created OK\n")); 749 *vpp = res_node->vnode; 750 } 751 } 752 753 /* try to relock parent */ 754 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 755 goto out; 756 } 757 758 /* all other files */ 759 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 760 761 /* lookup filename in the directory; location icb_loc */ 762 name = cnp->cn_nameptr; 763 namelen = cnp->cn_namelen; 764 error = udf_lookup_name_in_dir(dvp, name, namelen, 765 &icb_loc, &found); 766 if (error) 767 goto out; 768 if (!found) { 769 DPRINTF(LOOKUP, ("\tNOT found\n")); 770 /* 771 * The entry was not found in the directory. This is 772 * valid if we are creating or renaming an entry and 773 * are working on the last component of the path name. 774 */ 775 if (islastcn && (cnp->cn_nameiop == CREATE || 776 cnp->cn_nameiop == RENAME)) { 777 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 778 if (error) { 779 goto out; 780 } 781 error = EJUSTRETURN; 782 } else { 783 error = ENOENT; 784 } 785 /* done */ 786 goto done; 787 } 788 789 /* 790 * XXX NOTE tmpfs has a test here that tests that intermediate 791 * components i.e. not the last one ought to be either a directory or 792 * a link. It seems to function well without this code. 793 */ 794 795 /* try to create/reuse the node */ 796 error = udf_get_node(ump, &icb_loc, &res_node); 797 if (error) 798 goto out; 799 800 /* check permissions */ 801 if (islastcn && (cnp->cn_nameiop == DELETE || 802 cnp->cn_nameiop == RENAME) ) { 803 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 804 if (error) { 805 vput(res_node->vnode); 806 goto out; 807 } 808 809 /* 810 * Check if the directory has its sticky bit set. If so, ask 811 * for clearance since only the owner of a file or directory 812 * can remove/rename from taht directory. 813 */ 814 mode = udf_getaccessmode(dir_node); 815 if ((mode & S_ISTXT) != 0) { 816 udf_getownership(dir_node, &d_uid, &d_gid); 817 error = kauth_authorize_vnode(cnp->cn_cred, 818 KAUTH_VNODE_DELETE, res_node->vnode, 819 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 820 d_uid, d_uid)); 821 if (error) { 822 error = EPERM; 823 vput(res_node->vnode); 824 goto out; 825 } 826 } 827 } 828 829 *vpp = res_node->vnode; 830 831 done: 832 /* 833 * Store result in the cache if requested. If we are creating a file, 834 * the file might not be found and thus putting it into the namecache 835 * might be seen as negative caching. 836 */ 837 if (nameiop != CREATE) 838 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 839 cnp->cn_flags); 840 841 out: 842 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 843 844 return error; 845 } 846 847 /* --------------------------------------------------------------------- */ 848 849 int 850 udf_getattr(void *v) 851 { 852 struct vop_getattr_args /* { 853 struct vnode *a_vp; 854 struct vattr *a_vap; 855 kauth_cred_t a_cred; 856 struct lwp *a_l; 857 } */ *ap = v; 858 struct vnode *vp = ap->a_vp; 859 struct udf_node *udf_node = VTOI(vp); 860 struct udf_mount *ump = udf_node->ump; 861 struct file_entry *fe = udf_node->fe; 862 struct extfile_entry *efe = udf_node->efe; 863 struct filetimes_extattr_entry *ft_extattr; 864 struct device_extattr_entry *devattr; 865 struct vattr *vap = ap->a_vap; 866 struct timestamp *atime, *mtime, *attrtime, *creatime; 867 uint64_t filesize, blkssize; 868 uint32_t nlink; 869 uint32_t offset, a_l; 870 uint8_t *filedata; 871 uid_t uid; 872 gid_t gid; 873 int error; 874 875 DPRINTF(CALL, ("udf_getattr called\n")); 876 877 /* update times before we returning values */ 878 udf_itimes(udf_node, NULL, NULL, NULL); 879 880 /* get descriptor information */ 881 if (fe) { 882 nlink = udf_rw16(fe->link_cnt); 883 uid = (uid_t)udf_rw32(fe->uid); 884 gid = (gid_t)udf_rw32(fe->gid); 885 filesize = udf_rw64(fe->inf_len); 886 blkssize = udf_rw64(fe->logblks_rec); 887 atime = &fe->atime; 888 mtime = &fe->mtime; 889 attrtime = &fe->attrtime; 890 filedata = fe->data; 891 892 /* initial guess */ 893 creatime = mtime; 894 895 /* check our extended attribute if present */ 896 error = udf_extattr_search_intern(udf_node, 897 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 898 if (!error) { 899 ft_extattr = (struct filetimes_extattr_entry *) 900 (filedata + offset); 901 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 902 creatime = &ft_extattr->times[0]; 903 } 904 } else { 905 assert(udf_node->efe); 906 nlink = udf_rw16(efe->link_cnt); 907 uid = (uid_t)udf_rw32(efe->uid); 908 gid = (gid_t)udf_rw32(efe->gid); 909 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 910 blkssize = udf_rw64(efe->logblks_rec); 911 atime = &efe->atime; 912 mtime = &efe->mtime; 913 attrtime = &efe->attrtime; 914 creatime = &efe->ctime; 915 filedata = efe->data; 916 } 917 918 /* do the uid/gid translation game */ 919 if (uid == (uid_t) -1) 920 uid = ump->mount_args.anon_uid; 921 if (gid == (gid_t) -1) 922 gid = ump->mount_args.anon_gid; 923 924 /* fill in struct vattr with values from the node */ 925 vattr_null(vap); 926 vap->va_type = vp->v_type; 927 vap->va_mode = udf_getaccessmode(udf_node); 928 vap->va_nlink = nlink; 929 vap->va_uid = uid; 930 vap->va_gid = gid; 931 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 932 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 933 vap->va_size = filesize; 934 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 935 936 /* 937 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 938 * 1 to the link count if its a directory we're requested attributes 939 * of. 940 */ 941 if (vap->va_type == VDIR) 942 vap->va_nlink++; 943 944 /* access times */ 945 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 946 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 947 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 948 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 949 950 vap->va_gen = 1; /* no multiple generations yes (!?) */ 951 vap->va_flags = 0; /* no flags */ 952 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 953 vap->va_filerev = 1; /* TODO file revision numbers? */ 954 vap->va_vaflags = 0; 955 /* TODO get vaflags from the extended attributes? */ 956 957 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 958 error = udf_extattr_search_intern(udf_node, 959 UDF_DEVICESPEC_ATTR_NO, "", 960 &offset, &a_l); 961 /* if error, deny access */ 962 if (error || (filedata == NULL)) { 963 vap->va_mode = 0; /* or v_type = VNON? */ 964 } else { 965 devattr = (struct device_extattr_entry *) 966 filedata + offset; 967 vap->va_rdev = makedev( 968 udf_rw32(devattr->major), 969 udf_rw32(devattr->minor) 970 ); 971 /* TODO we could check the implementator */ 972 } 973 } 974 975 return 0; 976 } 977 978 /* --------------------------------------------------------------------- */ 979 980 static int 981 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 982 kauth_cred_t cred) 983 { 984 struct udf_node *udf_node = VTOI(vp); 985 uid_t uid; 986 gid_t gid; 987 int error; 988 989 #ifdef notyet 990 /* TODO get vaflags from the extended attributes? */ 991 /* Immutable or append-only files cannot be modified, either. */ 992 if (udf_node->flags & (IMMUTABLE | APPEND)) 993 return EPERM; 994 #endif 995 996 if (vp->v_mount->mnt_flag & MNT_RDONLY) 997 return EROFS; 998 999 /* retrieve old values */ 1000 udf_getownership(udf_node, &uid, &gid); 1001 1002 /* only one could be specified */ 1003 if (new_uid == VNOVAL) 1004 new_uid = uid; 1005 if (new_gid == VNOVAL) 1006 new_gid = gid; 1007 1008 /* check if we can fit it in an 32 bits */ 1009 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1010 return EINVAL; 1011 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1012 return EINVAL; 1013 1014 /* check permissions */ 1015 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1016 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1017 if (error) 1018 return (error); 1019 1020 /* change the ownership */ 1021 udf_setownership(udf_node, new_uid, new_gid); 1022 1023 /* mark node changed */ 1024 udf_node->i_flags |= IN_CHANGE; 1025 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1026 udf_node->i_flags |= IN_ACCESS; 1027 1028 return 0; 1029 } 1030 1031 1032 static int 1033 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1034 { 1035 struct udf_node *udf_node = VTOI(vp); 1036 uid_t uid; 1037 gid_t gid; 1038 int error; 1039 1040 #ifdef notyet 1041 /* TODO get vaflags from the extended attributes? */ 1042 /* Immutable or append-only files cannot be modified, either. */ 1043 if (udf_node->flags & (IMMUTABLE | APPEND)) 1044 return EPERM; 1045 #endif 1046 1047 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1048 return EROFS; 1049 1050 /* retrieve uid/gid values */ 1051 udf_getownership(udf_node, &uid, &gid); 1052 1053 /* check permissions */ 1054 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1055 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1056 if (error) 1057 return (error); 1058 1059 /* change mode */ 1060 udf_setaccessmode(udf_node, mode); 1061 1062 /* mark node changed */ 1063 udf_node->i_flags |= IN_CHANGE; 1064 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1065 udf_node->i_flags |= IN_ACCESS; 1066 1067 return 0; 1068 } 1069 1070 1071 /* exported */ 1072 int 1073 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1074 { 1075 struct udf_node *udf_node = VTOI(vp); 1076 int error, extended; 1077 1078 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1079 return EROFS; 1080 1081 /* Decide whether this is a valid operation based on the file type. */ 1082 switch (vp->v_type) { 1083 case VDIR: 1084 return EISDIR; 1085 case VREG: 1086 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1087 return EROFS; 1088 break; 1089 case VBLK: 1090 /* FALLTHROUGH */ 1091 case VCHR: 1092 /* FALLTHROUGH */ 1093 case VFIFO: 1094 /* Allow modifications of special files even if in the file 1095 * system is mounted read-only (we are not modifying the 1096 * files themselves, but the objects they represent). */ 1097 return 0; 1098 default: 1099 /* Anything else is unsupported. */ 1100 return EOPNOTSUPP; 1101 } 1102 1103 #if notyet 1104 /* TODO get vaflags from the extended attributes? */ 1105 /* Immutable or append-only files cannot be modified, either. */ 1106 if (node->flags & (IMMUTABLE | APPEND)) 1107 return EPERM; 1108 #endif 1109 1110 /* resize file to the requested size */ 1111 error = udf_resize_node(udf_node, newsize, &extended); 1112 1113 if (error == 0) { 1114 /* mark change */ 1115 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1116 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1117 udf_node->i_flags |= IN_ACCESS; 1118 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1119 udf_update(vp, NULL, NULL, NULL, 0); 1120 } 1121 1122 return error; 1123 } 1124 1125 1126 static int 1127 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1128 { 1129 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1130 return EROFS; 1131 1132 /* 1133 * XXX we can't do this yet, as its not described in the standard yet 1134 */ 1135 1136 return EOPNOTSUPP; 1137 } 1138 1139 1140 static int 1141 udf_chtimes(struct vnode *vp, 1142 struct timespec *atime, struct timespec *mtime, 1143 struct timespec *birthtime, int setattrflags, 1144 kauth_cred_t cred) 1145 { 1146 struct udf_node *udf_node = VTOI(vp); 1147 uid_t uid; 1148 gid_t gid; 1149 int error; 1150 1151 #ifdef notyet 1152 /* TODO get vaflags from the extended attributes? */ 1153 /* Immutable or append-only files cannot be modified, either. */ 1154 if (udf_node->flags & (IMMUTABLE | APPEND)) 1155 return EPERM; 1156 #endif 1157 1158 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1159 return EROFS; 1160 1161 /* retrieve uid/gid values */ 1162 udf_getownership(udf_node, &uid, &gid); 1163 1164 /* check permissions */ 1165 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1166 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1167 if (error) 1168 return (error); 1169 1170 /* update node flags depending on what times are passed */ 1171 if (atime->tv_sec != VNOVAL) 1172 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1173 udf_node->i_flags |= IN_ACCESS; 1174 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1175 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1176 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1177 udf_node->i_flags |= IN_ACCESS; 1178 } 1179 1180 return udf_update(vp, atime, mtime, birthtime, 0); 1181 } 1182 1183 1184 int 1185 udf_setattr(void *v) 1186 { 1187 struct vop_setattr_args /* { 1188 struct vnode *a_vp; 1189 struct vattr *a_vap; 1190 kauth_cred_t a_cred; 1191 struct lwp *a_l; 1192 } */ *ap = v; 1193 struct vnode *vp = ap->a_vp; 1194 /* struct udf_node *udf_node = VTOI(vp); */ 1195 /* struct udf_mount *ump = udf_node->ump; */ 1196 kauth_cred_t cred = ap->a_cred; 1197 struct vattr *vap = ap->a_vap; 1198 int error; 1199 1200 DPRINTF(CALL, ("udf_setattr called\n")); 1201 1202 /* Abort if any unsettable attribute is given. */ 1203 error = 0; 1204 if (vap->va_type != VNON || 1205 vap->va_nlink != VNOVAL || 1206 vap->va_fsid != VNOVAL || 1207 vap->va_fileid != VNOVAL || 1208 vap->va_blocksize != VNOVAL || 1209 #ifdef notyet 1210 /* checks are debated */ 1211 vap->va_ctime.tv_sec != VNOVAL || 1212 vap->va_ctime.tv_nsec != VNOVAL || 1213 vap->va_birthtime.tv_sec != VNOVAL || 1214 vap->va_birthtime.tv_nsec != VNOVAL || 1215 #endif 1216 vap->va_gen != VNOVAL || 1217 vap->va_rdev != VNOVAL || 1218 vap->va_bytes != VNOVAL) 1219 error = EINVAL; 1220 1221 DPRINTF(ATTR, ("setattr changing:\n")); 1222 if (error == 0 && (vap->va_flags != VNOVAL)) { 1223 DPRINTF(ATTR, ("\tchflags\n")); 1224 error = udf_chflags(vp, vap->va_flags, cred); 1225 } 1226 1227 if (error == 0 && (vap->va_size != VNOVAL)) { 1228 DPRINTF(ATTR, ("\tchsize\n")); 1229 error = udf_chsize(vp, vap->va_size, cred); 1230 } 1231 1232 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1233 DPRINTF(ATTR, ("\tchown\n")); 1234 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1235 } 1236 1237 if (error == 0 && (vap->va_mode != VNOVAL)) { 1238 DPRINTF(ATTR, ("\tchmod\n")); 1239 error = udf_chmod(vp, vap->va_mode, cred); 1240 } 1241 1242 if (error == 0 && 1243 ((vap->va_atime.tv_sec != VNOVAL && 1244 vap->va_atime.tv_nsec != VNOVAL) || 1245 (vap->va_mtime.tv_sec != VNOVAL && 1246 vap->va_mtime.tv_nsec != VNOVAL)) 1247 ) { 1248 DPRINTF(ATTR, ("\tchtimes\n")); 1249 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1250 &vap->va_birthtime, vap->va_vaflags, cred); 1251 } 1252 VN_KNOTE(vp, NOTE_ATTRIB); 1253 1254 return error; 1255 } 1256 1257 /* --------------------------------------------------------------------- */ 1258 1259 /* 1260 * Return POSIX pathconf information for UDF file systems. 1261 */ 1262 int 1263 udf_pathconf(void *v) 1264 { 1265 struct vop_pathconf_args /* { 1266 struct vnode *a_vp; 1267 int a_name; 1268 register_t *a_retval; 1269 } */ *ap = v; 1270 uint32_t bits; 1271 1272 DPRINTF(CALL, ("udf_pathconf called\n")); 1273 1274 switch (ap->a_name) { 1275 case _PC_LINK_MAX: 1276 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1277 return 0; 1278 case _PC_NAME_MAX: 1279 *ap->a_retval = UDF_MAXNAMLEN; 1280 return 0; 1281 case _PC_PATH_MAX: 1282 *ap->a_retval = PATH_MAX; 1283 return 0; 1284 case _PC_PIPE_BUF: 1285 *ap->a_retval = PIPE_BUF; 1286 return 0; 1287 case _PC_CHOWN_RESTRICTED: 1288 *ap->a_retval = 1; 1289 return 0; 1290 case _PC_NO_TRUNC: 1291 *ap->a_retval = 1; 1292 return 0; 1293 case _PC_SYNC_IO: 1294 *ap->a_retval = 0; /* synchronised is off for performance */ 1295 return 0; 1296 case _PC_FILESIZEBITS: 1297 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1298 bits = 64; /* XXX ought to deliver 65 */ 1299 #if 0 1300 if (udf_node) 1301 bits = 64 * vp->v_mount->mnt_dev_bshift; 1302 #endif 1303 *ap->a_retval = bits; 1304 return 0; 1305 } 1306 1307 return EINVAL; 1308 } 1309 1310 1311 /* --------------------------------------------------------------------- */ 1312 1313 int 1314 udf_open(void *v) 1315 { 1316 struct vop_open_args /* { 1317 struct vnode *a_vp; 1318 int a_mode; 1319 kauth_cred_t a_cred; 1320 struct proc *a_p; 1321 } */ *ap = v; 1322 int flags; 1323 1324 DPRINTF(CALL, ("udf_open called\n")); 1325 1326 /* 1327 * Files marked append-only must be opened for appending. 1328 * TODO: get chflags(2) flags from extened attribute. 1329 */ 1330 flags = 0; 1331 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1332 return (EPERM); 1333 1334 return 0; 1335 } 1336 1337 1338 /* --------------------------------------------------------------------- */ 1339 1340 int 1341 udf_close(void *v) 1342 { 1343 struct vop_close_args /* { 1344 struct vnode *a_vp; 1345 int a_fflag; 1346 kauth_cred_t a_cred; 1347 struct proc *a_p; 1348 } */ *ap = v; 1349 struct vnode *vp = ap->a_vp; 1350 struct udf_node *udf_node = VTOI(vp); 1351 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1352 int error; 1353 1354 DPRINTF(CALL, ("udf_close called\n")); 1355 udf_node = udf_node; /* shut up gcc */ 1356 1357 if (!async && (vp->v_type != VDIR)) { 1358 mutex_enter(vp->v_interlock); 1359 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1360 if (error) 1361 return error; 1362 } 1363 1364 mutex_enter(vp->v_interlock); 1365 if (vp->v_usecount > 1) 1366 udf_itimes(udf_node, NULL, NULL, NULL); 1367 mutex_exit(vp->v_interlock); 1368 1369 return 0; 1370 } 1371 1372 1373 /* --------------------------------------------------------------------- */ 1374 1375 static int 1376 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1377 { 1378 int flags; 1379 1380 /* check if we are allowed to write */ 1381 switch (vap->va_type) { 1382 case VDIR: 1383 case VLNK: 1384 case VREG: 1385 /* 1386 * normal nodes: check if we're on a read-only mounted 1387 * filingsystem and bomb out if we're trying to write. 1388 */ 1389 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1390 return EROFS; 1391 break; 1392 case VBLK: 1393 case VCHR: 1394 case VSOCK: 1395 case VFIFO: 1396 /* 1397 * special nodes: even on read-only mounted filingsystems 1398 * these are allowed to be written to if permissions allow. 1399 */ 1400 break; 1401 default: 1402 /* no idea what this is */ 1403 return EINVAL; 1404 } 1405 1406 /* noone may write immutable files */ 1407 /* TODO: get chflags(2) flags from extened attribute. */ 1408 flags = 0; 1409 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1410 return EPERM; 1411 1412 return 0; 1413 } 1414 1415 static int 1416 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1417 kauth_cred_t cred) 1418 { 1419 /* ask the generic genfs_can_access to advice on security */ 1420 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1421 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1422 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1423 } 1424 1425 int 1426 udf_access(void *v) 1427 { 1428 struct vop_access_args /* { 1429 struct vnode *a_vp; 1430 int a_mode; 1431 kauth_cred_t a_cred; 1432 struct proc *a_p; 1433 } */ *ap = v; 1434 struct vnode *vp = ap->a_vp; 1435 mode_t mode = ap->a_mode; 1436 kauth_cred_t cred = ap->a_cred; 1437 /* struct udf_node *udf_node = VTOI(vp); */ 1438 struct vattr vap; 1439 int error; 1440 1441 DPRINTF(CALL, ("udf_access called\n")); 1442 1443 error = VOP_GETATTR(vp, &vap, NULL); 1444 if (error) 1445 return error; 1446 1447 error = udf_check_possible(vp, &vap, mode); 1448 if (error) 1449 return error; 1450 1451 error = udf_check_permitted(vp, &vap, mode, cred); 1452 1453 return error; 1454 } 1455 1456 /* --------------------------------------------------------------------- */ 1457 1458 int 1459 udf_create(void *v) 1460 { 1461 struct vop_create_args /* { 1462 struct vnode *a_dvp; 1463 struct vnode **a_vpp; 1464 struct componentname *a_cnp; 1465 struct vattr *a_vap; 1466 } */ *ap = v; 1467 struct vnode *dvp = ap->a_dvp; 1468 struct vnode **vpp = ap->a_vpp; 1469 struct vattr *vap = ap->a_vap; 1470 struct componentname *cnp = ap->a_cnp; 1471 int error; 1472 1473 DPRINTF(CALL, ("udf_create called\n")); 1474 error = udf_create_node(dvp, vpp, vap, cnp); 1475 1476 vput(dvp); 1477 return error; 1478 } 1479 1480 /* --------------------------------------------------------------------- */ 1481 1482 int 1483 udf_mknod(void *v) 1484 { 1485 struct vop_mknod_args /* { 1486 struct vnode *a_dvp; 1487 struct vnode **a_vpp; 1488 struct componentname *a_cnp; 1489 struct vattr *a_vap; 1490 } */ *ap = v; 1491 struct vnode *dvp = ap->a_dvp; 1492 struct vnode **vpp = ap->a_vpp; 1493 struct vattr *vap = ap->a_vap; 1494 struct componentname *cnp = ap->a_cnp; 1495 int error; 1496 1497 DPRINTF(CALL, ("udf_mknod called\n")); 1498 error = udf_create_node(dvp, vpp, vap, cnp); 1499 1500 vput(dvp); 1501 return error; 1502 } 1503 1504 /* --------------------------------------------------------------------- */ 1505 1506 int 1507 udf_mkdir(void *v) 1508 { 1509 struct vop_mkdir_args /* { 1510 struct vnode *a_dvp; 1511 struct vnode **a_vpp; 1512 struct componentname *a_cnp; 1513 struct vattr *a_vap; 1514 } */ *ap = v; 1515 struct vnode *dvp = ap->a_dvp; 1516 struct vnode **vpp = ap->a_vpp; 1517 struct vattr *vap = ap->a_vap; 1518 struct componentname *cnp = ap->a_cnp; 1519 int error; 1520 1521 DPRINTF(CALL, ("udf_mkdir called\n")); 1522 error = udf_create_node(dvp, vpp, vap, cnp); 1523 1524 vput(dvp); 1525 return error; 1526 } 1527 1528 /* --------------------------------------------------------------------- */ 1529 1530 static int 1531 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1532 { 1533 struct udf_node *udf_node, *dir_node; 1534 struct vattr vap; 1535 int error; 1536 1537 DPRINTF(CALL, ("udf_link called\n")); 1538 KASSERT(dvp != vp); 1539 KASSERT(vp->v_type != VDIR); 1540 KASSERT(dvp->v_mount == vp->v_mount); 1541 1542 /* get attributes */ 1543 dir_node = VTOI(dvp); 1544 udf_node = VTOI(vp); 1545 1546 error = VOP_GETATTR(vp, &vap, FSCRED); 1547 if (error) { 1548 VOP_UNLOCK(vp); 1549 return error; 1550 } 1551 1552 /* check link count overflow */ 1553 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1554 VOP_UNLOCK(vp); 1555 return EMLINK; 1556 } 1557 1558 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1559 if (error) 1560 VOP_UNLOCK(vp); 1561 return error; 1562 } 1563 1564 int 1565 udf_link(void *v) 1566 { 1567 struct vop_link_args /* { 1568 struct vnode *a_dvp; 1569 struct vnode *a_vp; 1570 struct componentname *a_cnp; 1571 } */ *ap = v; 1572 struct vnode *dvp = ap->a_dvp; 1573 struct vnode *vp = ap->a_vp; 1574 struct componentname *cnp = ap->a_cnp; 1575 int error; 1576 1577 error = udf_do_link(dvp, vp, cnp); 1578 if (error) 1579 VOP_ABORTOP(dvp, cnp); 1580 1581 VN_KNOTE(vp, NOTE_LINK); 1582 VN_KNOTE(dvp, NOTE_WRITE); 1583 vput(dvp); 1584 1585 return error; 1586 } 1587 1588 /* --------------------------------------------------------------------- */ 1589 1590 static int 1591 udf_do_symlink(struct udf_node *udf_node, char *target) 1592 { 1593 struct pathcomp pathcomp; 1594 uint8_t *pathbuf, *pathpos, *compnamepos; 1595 char *mntonname; 1596 int pathlen, len, compnamelen, mntonnamelen; 1597 int error; 1598 1599 /* process `target' to an UDF structure */ 1600 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1601 pathpos = pathbuf; 1602 pathlen = 0; 1603 1604 if (*target == '/') { 1605 /* symlink starts from the root */ 1606 len = UDF_PATH_COMP_SIZE; 1607 memset(&pathcomp, 0, len); 1608 pathcomp.type = UDF_PATH_COMP_ROOT; 1609 1610 /* check if its mount-point relative! */ 1611 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1612 mntonnamelen = strlen(mntonname); 1613 if (strlen(target) >= mntonnamelen) { 1614 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1615 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1616 target += mntonnamelen; 1617 } 1618 } else { 1619 target++; 1620 } 1621 1622 memcpy(pathpos, &pathcomp, len); 1623 pathpos += len; 1624 pathlen += len; 1625 } 1626 1627 error = 0; 1628 while (*target) { 1629 /* ignore multiple '/' */ 1630 while (*target == '/') { 1631 target++; 1632 } 1633 if (!*target) 1634 break; 1635 1636 /* extract component name */ 1637 compnamelen = 0; 1638 compnamepos = target; 1639 while ((*target) && (*target != '/')) { 1640 target++; 1641 compnamelen++; 1642 } 1643 1644 /* just trunc if too long ?? (security issue) */ 1645 if (compnamelen >= 127) { 1646 error = ENAMETOOLONG; 1647 break; 1648 } 1649 1650 /* convert unix name to UDF name */ 1651 len = sizeof(struct pathcomp); 1652 memset(&pathcomp, 0, len); 1653 pathcomp.type = UDF_PATH_COMP_NAME; 1654 len = UDF_PATH_COMP_SIZE; 1655 1656 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1657 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1658 if ((compnamelen == 1) && (*compnamepos == '.')) 1659 pathcomp.type = UDF_PATH_COMP_CURDIR; 1660 1661 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1662 unix_to_udf_name( 1663 (char *) &pathcomp.ident, &pathcomp.l_ci, 1664 compnamepos, compnamelen, 1665 &udf_node->ump->logical_vol->desc_charset); 1666 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1667 } 1668 1669 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1670 error = ENAMETOOLONG; 1671 break; 1672 } 1673 1674 memcpy(pathpos, &pathcomp, len); 1675 pathpos += len; 1676 pathlen += len; 1677 } 1678 1679 if (error) { 1680 /* aparently too big */ 1681 free(pathbuf, M_UDFTEMP); 1682 return error; 1683 } 1684 1685 error = udf_grow_node(udf_node, pathlen); 1686 if (error) { 1687 /* failed to pregrow node */ 1688 free(pathbuf, M_UDFTEMP); 1689 return error; 1690 } 1691 1692 /* write out structure on the new file */ 1693 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1694 pathbuf, pathlen, 0, 1695 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1696 FSCRED, NULL, NULL); 1697 1698 /* return status of symlink contents writeout */ 1699 free(pathbuf, M_UDFTEMP); 1700 return error; 1701 } 1702 1703 1704 int 1705 udf_symlink(void *v) 1706 { 1707 struct vop_symlink_args /* { 1708 struct vnode *a_dvp; 1709 struct vnode **a_vpp; 1710 struct componentname *a_cnp; 1711 struct vattr *a_vap; 1712 char *a_target; 1713 } */ *ap = v; 1714 struct vnode *dvp = ap->a_dvp; 1715 struct vnode **vpp = ap->a_vpp; 1716 struct vattr *vap = ap->a_vap; 1717 struct componentname *cnp = ap->a_cnp; 1718 struct udf_node *dir_node; 1719 struct udf_node *udf_node; 1720 int error; 1721 1722 DPRINTF(CALL, ("udf_symlink called\n")); 1723 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1724 error = udf_create_node(dvp, vpp, vap, cnp); 1725 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1726 if (!error) { 1727 dir_node = VTOI(dvp); 1728 udf_node = VTOI(*vpp); 1729 KASSERT(udf_node); 1730 error = udf_do_symlink(udf_node, ap->a_target); 1731 if (error) { 1732 /* remove node */ 1733 udf_shrink_node(udf_node, 0); 1734 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1735 } 1736 } 1737 vput(dvp); 1738 return error; 1739 } 1740 1741 /* --------------------------------------------------------------------- */ 1742 1743 int 1744 udf_readlink(void *v) 1745 { 1746 struct vop_readlink_args /* { 1747 struct vnode *a_vp; 1748 struct uio *a_uio; 1749 kauth_cred_t a_cred; 1750 } */ *ap = v; 1751 struct vnode *vp = ap->a_vp; 1752 struct uio *uio = ap->a_uio; 1753 kauth_cred_t cred = ap->a_cred; 1754 struct udf_node *udf_node; 1755 struct pathcomp pathcomp; 1756 struct vattr vattr; 1757 uint8_t *pathbuf, *targetbuf, *tmpname; 1758 uint8_t *pathpos, *targetpos; 1759 char *mntonname; 1760 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1761 int first, error; 1762 1763 DPRINTF(CALL, ("udf_readlink called\n")); 1764 1765 udf_node = VTOI(vp); 1766 error = VOP_GETATTR(vp, &vattr, cred); 1767 if (error) 1768 return error; 1769 1770 /* claim temporary buffers for translation */ 1771 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1772 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1773 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1774 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1775 memset(targetbuf, 0, PATH_MAX); 1776 1777 /* read contents of file in our temporary buffer */ 1778 error = vn_rdwr(UIO_READ, udf_node->vnode, 1779 pathbuf, vattr.va_size, 0, 1780 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1781 FSCRED, NULL, NULL); 1782 if (error) { 1783 /* failed to read in symlink contents */ 1784 free(pathbuf, M_UDFTEMP); 1785 free(targetbuf, M_UDFTEMP); 1786 free(tmpname, M_UDFTEMP); 1787 return error; 1788 } 1789 1790 /* convert to a unix path */ 1791 pathpos = pathbuf; 1792 pathlen = 0; 1793 targetpos = targetbuf; 1794 targetlen = PATH_MAX; 1795 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1796 mntonnamelen = strlen(mntonname); 1797 1798 error = 0; 1799 first = 1; 1800 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1801 len = UDF_PATH_COMP_SIZE; 1802 memcpy(&pathcomp, pathpos, len); 1803 l_ci = pathcomp.l_ci; 1804 switch (pathcomp.type) { 1805 case UDF_PATH_COMP_ROOT : 1806 /* XXX should check for l_ci; bugcompatible now */ 1807 if ((targetlen < 1) || !first) { 1808 error = EINVAL; 1809 break; 1810 } 1811 *targetpos++ = '/'; targetlen--; 1812 break; 1813 case UDF_PATH_COMP_MOUNTROOT : 1814 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1815 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1816 error = EINVAL; 1817 break; 1818 } 1819 memcpy(targetpos, mntonname, mntonnamelen); 1820 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1821 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1822 /* more follows, so must be directory */ 1823 *targetpos++ = '/'; targetlen--; 1824 } 1825 break; 1826 case UDF_PATH_COMP_PARENTDIR : 1827 /* XXX should check for l_ci; bugcompatible now */ 1828 if (targetlen < 3) { 1829 error = EINVAL; 1830 break; 1831 } 1832 *targetpos++ = '.'; targetlen--; 1833 *targetpos++ = '.'; targetlen--; 1834 *targetpos++ = '/'; targetlen--; 1835 break; 1836 case UDF_PATH_COMP_CURDIR : 1837 /* XXX should check for l_ci; bugcompatible now */ 1838 if (targetlen < 2) { 1839 error = EINVAL; 1840 break; 1841 } 1842 *targetpos++ = '.'; targetlen--; 1843 *targetpos++ = '/'; targetlen--; 1844 break; 1845 case UDF_PATH_COMP_NAME : 1846 if (l_ci == 0) { 1847 error = EINVAL; 1848 break; 1849 } 1850 memset(tmpname, 0, PATH_MAX); 1851 memcpy(&pathcomp, pathpos, len + l_ci); 1852 udf_to_unix_name(tmpname, MAXPATHLEN, 1853 pathcomp.ident, l_ci, 1854 &udf_node->ump->logical_vol->desc_charset); 1855 namelen = strlen(tmpname); 1856 if (targetlen < namelen + 1) { 1857 error = EINVAL; 1858 break; 1859 } 1860 memcpy(targetpos, tmpname, namelen); 1861 targetpos += namelen; targetlen -= namelen; 1862 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1863 /* more follows, so must be directory */ 1864 *targetpos++ = '/'; targetlen--; 1865 } 1866 break; 1867 default : 1868 error = EINVAL; 1869 break; 1870 } 1871 first = 0; 1872 if (error) 1873 break; 1874 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1875 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1876 1877 } 1878 /* all processed? */ 1879 if (vattr.va_size - pathlen > 0) 1880 error = EINVAL; 1881 1882 /* uiomove() to destination */ 1883 if (!error) 1884 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1885 1886 free(pathbuf, M_UDFTEMP); 1887 free(targetbuf, M_UDFTEMP); 1888 free(tmpname, M_UDFTEMP); 1889 1890 return error; 1891 } 1892 1893 /* --------------------------------------------------------------------- */ 1894 1895 /* 1896 * udf_rename() moved to udf_rename.c 1897 */ 1898 1899 /* --------------------------------------------------------------------- */ 1900 1901 int 1902 udf_remove(void *v) 1903 { 1904 struct vop_remove_args /* { 1905 struct vnode *a_dvp; 1906 struct vnode *a_vp; 1907 struct componentname *a_cnp; 1908 } */ *ap = v; 1909 struct vnode *dvp = ap->a_dvp; 1910 struct vnode *vp = ap->a_vp; 1911 struct componentname *cnp = ap->a_cnp; 1912 struct udf_node *dir_node = VTOI(dvp); 1913 struct udf_node *udf_node = VTOI(vp); 1914 struct udf_mount *ump = dir_node->ump; 1915 int error; 1916 1917 DPRINTF(CALL, ("udf_remove called\n")); 1918 if (vp->v_type != VDIR) { 1919 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1920 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1921 } else { 1922 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1923 error = EPERM; 1924 } 1925 1926 if (error == 0) { 1927 VN_KNOTE(vp, NOTE_DELETE); 1928 VN_KNOTE(dvp, NOTE_WRITE); 1929 } 1930 1931 if (dvp == vp) 1932 vrele(vp); 1933 else 1934 vput(vp); 1935 vput(dvp); 1936 1937 return error; 1938 } 1939 1940 /* --------------------------------------------------------------------- */ 1941 1942 int 1943 udf_rmdir(void *v) 1944 { 1945 struct vop_rmdir_args /* { 1946 struct vnode *a_dvp; 1947 struct vnode *a_vp; 1948 struct componentname *a_cnp; 1949 } */ *ap = v; 1950 struct vnode *vp = ap->a_vp; 1951 struct vnode *dvp = ap->a_dvp; 1952 struct componentname *cnp = ap->a_cnp; 1953 struct udf_node *dir_node = VTOI(dvp); 1954 struct udf_node *udf_node = VTOI(vp); 1955 struct udf_mount *ump = dir_node->ump; 1956 int error, isempty; 1957 1958 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1959 1960 /* don't allow '.' to be deleted */ 1961 if (dir_node == udf_node) { 1962 vrele(dvp); 1963 vput(vp); 1964 return EINVAL; 1965 } 1966 1967 /* make sure our `leaf' node's hash is populated */ 1968 dirhash_get(&udf_node->dir_hash); 1969 error = udf_dirhash_fill(udf_node); 1970 if (error) { 1971 dirhash_put(udf_node->dir_hash); 1972 return error; 1973 } 1974 1975 /* check to see if the directory is empty */ 1976 isempty = dirhash_dir_isempty(udf_node->dir_hash); 1977 dirhash_put(udf_node->dir_hash); 1978 1979 if (!isempty) { 1980 vput(dvp); 1981 vput(vp); 1982 return ENOTEMPTY; 1983 } 1984 1985 /* detach the node from the directory, udf_node is an empty dir here */ 1986 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1987 if (error == 0) { 1988 cache_purge(vp); 1989 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1990 /* 1991 * Bug alert: we need to remove '..' from the detaching 1992 * udf_node so further lookups of this are not possible. This 1993 * prevents a process in a deleted directory from going to its 1994 * deleted parent. Since `udf_node' is garanteed to be empty 1995 * here, trunc it so no fids are there. 1996 */ 1997 dirhash_purge(&udf_node->dir_hash); 1998 udf_shrink_node(udf_node, 0); 1999 VN_KNOTE(vp, NOTE_DELETE); 2000 } 2001 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 2002 2003 /* unput the nodes and exit */ 2004 vput(dvp); 2005 vput(vp); 2006 2007 return error; 2008 } 2009 2010 /* --------------------------------------------------------------------- */ 2011 2012 int 2013 udf_fsync(void *v) 2014 { 2015 struct vop_fsync_args /* { 2016 struct vnode *a_vp; 2017 kauth_cred_t a_cred; 2018 int a_flags; 2019 off_t offlo; 2020 off_t offhi; 2021 struct proc *a_p; 2022 } */ *ap = v; 2023 struct vnode *vp = ap->a_vp; 2024 struct udf_node *udf_node = VTOI(vp); 2025 int error, flags, wait; 2026 2027 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2028 udf_node, 2029 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2030 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2031 2032 /* flush data and wait for it when requested */ 2033 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2034 error = vflushbuf(vp, ap->a_flags); 2035 if (error) 2036 return error; 2037 2038 if (udf_node == NULL) { 2039 printf("udf_fsync() called on NULL udf_node!\n"); 2040 return 0; 2041 } 2042 if (vp->v_tag != VT_UDF) { 2043 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2044 return 0; 2045 } 2046 2047 /* set our times */ 2048 udf_itimes(udf_node, NULL, NULL, NULL); 2049 2050 /* if called when mounted readonly, never write back */ 2051 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2052 return 0; 2053 2054 /* if only data is requested, return */ 2055 if (ap->a_flags & FSYNC_DATAONLY) 2056 return 0; 2057 2058 /* check if the node is dirty 'enough'*/ 2059 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2060 if (flags == 0) 2061 return 0; 2062 2063 /* if we don't have to wait, check for IO pending */ 2064 if (!wait) { 2065 if (vp->v_numoutput > 0) { 2066 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2067 return 0; 2068 } 2069 if (udf_node->outstanding_bufs > 0) { 2070 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2071 return 0; 2072 } 2073 if (udf_node->outstanding_nodedscr > 0) { 2074 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2075 return 0; 2076 } 2077 } 2078 2079 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2080 if (wait) { 2081 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2082 mutex_enter(vp->v_interlock); 2083 while (vp->v_numoutput) { 2084 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2085 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2086 } 2087 mutex_exit(vp->v_interlock); 2088 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2089 } 2090 2091 /* write out node and wait for it if requested */ 2092 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2093 error = udf_writeout_node(udf_node, wait); 2094 if (error) 2095 return error; 2096 2097 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2098 2099 return 0; 2100 } 2101 2102 /* --------------------------------------------------------------------- */ 2103 2104 int 2105 udf_advlock(void *v) 2106 { 2107 struct vop_advlock_args /* { 2108 struct vnode *a_vp; 2109 void *a_id; 2110 int a_op; 2111 struct flock *a_fl; 2112 int a_flags; 2113 } */ *ap = v; 2114 struct vnode *vp = ap->a_vp; 2115 struct udf_node *udf_node = VTOI(vp); 2116 struct file_entry *fe; 2117 struct extfile_entry *efe; 2118 uint64_t file_size; 2119 2120 DPRINTF(LOCKING, ("udf_advlock called\n")); 2121 2122 /* get directory filesize */ 2123 if (udf_node->fe) { 2124 fe = udf_node->fe; 2125 file_size = udf_rw64(fe->inf_len); 2126 } else { 2127 assert(udf_node->efe); 2128 efe = udf_node->efe; 2129 file_size = udf_rw64(efe->inf_len); 2130 } 2131 2132 return lf_advlock(ap, &udf_node->lockf, file_size); 2133 } 2134 2135 /* --------------------------------------------------------------------- */ 2136 2137 /* Global vfs vnode data structures for udfs */ 2138 int (**udf_vnodeop_p)(void *); 2139 2140 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2141 { &vop_default_desc, vn_default_error }, 2142 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2143 { &vop_create_desc, udf_create }, /* create */ 2144 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2145 { &vop_open_desc, udf_open }, /* open */ 2146 { &vop_close_desc, udf_close }, /* close */ 2147 { &vop_access_desc, udf_access }, /* access */ 2148 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2149 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2150 { &vop_read_desc, udf_read }, /* read */ 2151 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2152 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2153 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2154 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2155 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2156 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2157 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2158 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2159 { &vop_seek_desc, genfs_seek }, /* seek */ 2160 { &vop_remove_desc, udf_remove }, /* remove */ 2161 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2162 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2163 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2164 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2165 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2166 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2167 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2168 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2169 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2170 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2171 { &vop_lock_desc, genfs_lock }, /* lock */ 2172 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2173 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2174 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2175 /* { &vop_print_desc, udf_print }, */ /* print */ 2176 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2177 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2178 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2179 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2180 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2181 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2182 { NULL, NULL } 2183 }; 2184 2185 2186 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2187 &udf_vnodeop_p, udf_vnodeop_entries 2188 }; 2189
Indexes created Thu Oct 02 14:10:14 GMT 2025