1 /* $NetBSD: udf_vnops.c,v 1.89 2014/01/23 10:13:56 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 1.89 2014/01/23 10:13:56 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, sectors; 468 469 DPRINTF(STRATEGY, ("udf_strategy called\n")); 470 471 /* check if we ought to be here */ 472 if (vp->v_type == VBLK || vp->v_type == VCHR) 473 panic("udf_strategy: spec"); 474 475 /* only filebuffers ought to be read/write by this, no descriptors */ 476 assert(bp->b_blkno >= 0); 477 478 /* get sector size */ 479 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 480 481 /* calculate length to fetch/store in sectors */ 482 sectors = bp->b_bcount / lb_size; 483 assert(bp->b_bcount > 0); 484 485 /* NEVER assume later that this buffer is already translated */ 486 /* bp->b_lblkno = bp->b_blkno; */ 487 488 /* check assertions: we OUGHT to always get multiples of this */ 489 assert(sectors * lb_size == bp->b_bcount); 490 491 /* issue buffer */ 492 if (bp->b_flags & B_READ) { 493 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 494 ", for %d sectors\n", 495 vp, bp, bp->b_blkno, sectors)); 496 497 /* read buffer from the udf_node, translate vtop on the way*/ 498 udf_read_filebuf(udf_node, bp); 499 } else { 500 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 501 ", for %d sectors\n", 502 vp, bp, bp->b_blkno, sectors)); 503 504 /* write buffer to the udf_node, translate vtop on the way*/ 505 udf_write_filebuf(udf_node, bp); 506 } 507 508 return bp->b_error; 509 } 510 511 /* --------------------------------------------------------------------- */ 512 513 int 514 udf_readdir(void *v) 515 { 516 struct vop_readdir_args /* { 517 struct vnode *a_vp; 518 struct uio *a_uio; 519 kauth_cred_t a_cred; 520 int *a_eofflag; 521 off_t **a_cookies; 522 int *a_ncookies; 523 } */ *ap = v; 524 struct uio *uio = ap->a_uio; 525 struct vnode *vp = ap->a_vp; 526 struct udf_node *udf_node = VTOI(vp); 527 struct file_entry *fe; 528 struct extfile_entry *efe; 529 struct fileid_desc *fid; 530 struct dirent *dirent; 531 uint64_t file_size, diroffset, transoffset; 532 uint32_t lb_size; 533 int error; 534 535 DPRINTF(READDIR, ("udf_readdir called\n")); 536 537 /* This operation only makes sense on directory nodes. */ 538 if (vp->v_type != VDIR) 539 return ENOTDIR; 540 541 /* get directory filesize */ 542 if (udf_node->fe) { 543 fe = udf_node->fe; 544 file_size = udf_rw64(fe->inf_len); 545 } else { 546 assert(udf_node->efe); 547 efe = udf_node->efe; 548 file_size = udf_rw64(efe->inf_len); 549 } 550 551 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 552 553 /* 554 * Add `.' pseudo entry if at offset zero since its not in the fid 555 * stream 556 */ 557 if (uio->uio_offset == 0) { 558 DPRINTF(READDIR, ("\t'.' inserted\n")); 559 strcpy(dirent->d_name, "."); 560 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 561 dirent->d_type = DT_DIR; 562 dirent->d_namlen = strlen(dirent->d_name); 563 dirent->d_reclen = _DIRENT_SIZE(dirent); 564 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 565 566 /* mark with magic value that we have done the dummy */ 567 uio->uio_offset = UDF_DIRCOOKIE_DOT; 568 } 569 570 /* we are called just as long as we keep on pushing data in */ 571 error = 0; 572 if (uio->uio_offset < file_size) { 573 /* allocate temporary space for fid */ 574 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 575 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 576 577 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 578 uio->uio_offset = 0; 579 580 diroffset = uio->uio_offset; 581 transoffset = diroffset; 582 while (diroffset < file_size) { 583 DPRINTF(READDIR, ("\tread in fid stream\n")); 584 /* transfer a new fid/dirent */ 585 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 586 DPRINTFIF(READDIR, error, ("read error in read fid " 587 "stream : %d\n", error)); 588 if (error) 589 break; 590 591 /* 592 * If there isn't enough space in the uio to return a 593 * whole dirent, break off read 594 */ 595 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 596 break; 597 598 /* remember the last entry we transfered */ 599 transoffset = diroffset; 600 601 /* skip deleted entries */ 602 if (fid->file_char & UDF_FILE_CHAR_DEL) 603 continue; 604 605 /* skip not visible files */ 606 if (fid->file_char & UDF_FILE_CHAR_VIS) 607 continue; 608 609 /* copy dirent to the caller */ 610 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 611 dirent->d_name, dirent->d_type)); 612 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 613 } 614 615 /* pass on last transfered offset */ 616 uio->uio_offset = transoffset; 617 free(fid, M_UDFTEMP); 618 } 619 620 if (ap->a_eofflag) 621 *ap->a_eofflag = (uio->uio_offset >= file_size); 622 623 #ifdef DEBUG 624 if (udf_verbose & UDF_DEBUG_READDIR) { 625 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 626 if (ap->a_eofflag) 627 printf("returning EOF ? %d\n", *ap->a_eofflag); 628 if (error) 629 printf("readdir returning error %d\n", error); 630 } 631 #endif 632 633 free(dirent, M_UDFTEMP); 634 return error; 635 } 636 637 /* --------------------------------------------------------------------- */ 638 639 int 640 udf_lookup(void *v) 641 { 642 struct vop_lookup_args /* { 643 struct vnode *a_dvp; 644 struct vnode **a_vpp; 645 struct componentname *a_cnp; 646 } */ *ap = v; 647 struct vnode *dvp = ap->a_dvp; 648 struct vnode **vpp = ap->a_vpp; 649 struct componentname *cnp = ap->a_cnp; 650 struct udf_node *dir_node, *res_node; 651 struct udf_mount *ump; 652 struct long_ad icb_loc; 653 mode_t mode; 654 uid_t d_uid; 655 gid_t d_gid; 656 const char *name; 657 int namelen, nameiop, islastcn, mounted_ro; 658 int error, found; 659 660 dir_node = VTOI(dvp); 661 ump = dir_node->ump; 662 *vpp = NULL; 663 664 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 665 cnp->cn_nameptr)); 666 667 /* simplify/clarification flags */ 668 nameiop = cnp->cn_nameiop; 669 islastcn = cnp->cn_flags & ISLASTCN; 670 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 671 672 /* check exec/dirread permissions first */ 673 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 674 if (error) 675 return error; 676 677 DPRINTF(LOOKUP, ("\taccess ok\n")); 678 679 /* 680 * If requesting a modify on the last path element on a read-only 681 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 682 */ 683 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 684 return EROFS; 685 686 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 687 cnp->cn_nameptr)); 688 /* look in the namecache */ 689 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 690 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 691 return *vpp == NULLVP ? ENOENT : 0; 692 } 693 694 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 695 696 /* 697 * Obviously, the file is not (anymore) in the namecache, we have to 698 * search for it. There are three basic cases: '.', '..' and others. 699 * 700 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 701 */ 702 error = 0; 703 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 704 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 705 /* special case 1 '.' */ 706 if (islastcn && cnp->cn_nameiop == RENAME) { 707 error = EISDIR; 708 goto out; 709 } 710 vref(dvp); 711 *vpp = dvp; 712 /* done */ 713 goto done; 714 } else if (cnp->cn_flags & ISDOTDOT) { 715 /* special case 2 '..' */ 716 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 717 718 if (islastcn && cnp->cn_nameiop == RENAME) { 719 error = EINVAL; 720 goto out; 721 } 722 723 /* get our node */ 724 name = ".."; 725 namelen = 2; 726 error = udf_lookup_name_in_dir(dvp, name, namelen, 727 &icb_loc, &found); 728 if (error) 729 goto out; 730 if (!found) 731 error = ENOENT; 732 733 /* first unlock parent */ 734 VOP_UNLOCK(dvp); 735 736 if (error == 0) { 737 DPRINTF(LOOKUP, ("\tfound '..'\n")); 738 /* try to create/reuse the node */ 739 error = udf_get_node(ump, &icb_loc, &res_node); 740 741 if (!error) { 742 DPRINTF(LOOKUP, 743 ("\tnode retrieved/created OK\n")); 744 *vpp = res_node->vnode; 745 } 746 } 747 748 /* try to relock parent */ 749 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 750 goto out; 751 } 752 753 /* all other files */ 754 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 755 756 /* lookup filename in the directory; location icb_loc */ 757 name = cnp->cn_nameptr; 758 namelen = cnp->cn_namelen; 759 error = udf_lookup_name_in_dir(dvp, name, namelen, 760 &icb_loc, &found); 761 if (error) 762 goto out; 763 if (!found) { 764 DPRINTF(LOOKUP, ("\tNOT found\n")); 765 /* 766 * The entry was not found in the directory. This is 767 * valid if we are creating or renaming an entry and 768 * are working on the last component of the path name. 769 */ 770 if (islastcn && (cnp->cn_nameiop == CREATE || 771 cnp->cn_nameiop == RENAME)) { 772 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 773 if (error) { 774 goto out; 775 } 776 error = EJUSTRETURN; 777 } else { 778 error = ENOENT; 779 } 780 /* done */ 781 goto done; 782 } 783 784 /* 785 * XXX NOTE tmpfs has a test here that tests that intermediate 786 * components i.e. not the last one ought to be either a directory or 787 * a link. It seems to function well without this code. 788 */ 789 790 /* try to create/reuse the node */ 791 error = udf_get_node(ump, &icb_loc, &res_node); 792 if (error) 793 goto out; 794 795 /* check permissions */ 796 if (islastcn && (cnp->cn_nameiop == DELETE || 797 cnp->cn_nameiop == RENAME) ) { 798 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 799 if (error) { 800 vput(res_node->vnode); 801 goto out; 802 } 803 804 /* 805 * Check if the directory has its sticky bit set. If so, ask 806 * for clearance since only the owner of a file or directory 807 * can remove/rename from taht directory. 808 */ 809 mode = udf_getaccessmode(dir_node); 810 if ((mode & S_ISTXT) != 0) { 811 udf_getownership(dir_node, &d_uid, &d_gid); 812 error = kauth_authorize_vnode(cnp->cn_cred, 813 KAUTH_VNODE_DELETE, res_node->vnode, 814 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 815 d_uid, d_uid)); 816 if (error) { 817 error = EPERM; 818 vput(res_node->vnode); 819 goto out; 820 } 821 } 822 } 823 824 *vpp = res_node->vnode; 825 826 done: 827 /* 828 * Store result in the cache if requested. If we are creating a file, 829 * the file might not be found and thus putting it into the namecache 830 * might be seen as negative caching. 831 */ 832 if (nameiop != CREATE) 833 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 834 cnp->cn_flags); 835 836 out: 837 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 838 839 return error; 840 } 841 842 /* --------------------------------------------------------------------- */ 843 844 int 845 udf_getattr(void *v) 846 { 847 struct vop_getattr_args /* { 848 struct vnode *a_vp; 849 struct vattr *a_vap; 850 kauth_cred_t a_cred; 851 struct lwp *a_l; 852 } */ *ap = v; 853 struct vnode *vp = ap->a_vp; 854 struct udf_node *udf_node = VTOI(vp); 855 struct udf_mount *ump = udf_node->ump; 856 struct file_entry *fe = udf_node->fe; 857 struct extfile_entry *efe = udf_node->efe; 858 struct filetimes_extattr_entry *ft_extattr; 859 struct device_extattr_entry *devattr; 860 struct vattr *vap = ap->a_vap; 861 struct timestamp *atime, *mtime, *attrtime, *creatime; 862 uint64_t filesize, blkssize; 863 uint32_t nlink; 864 uint32_t offset, a_l; 865 uint8_t *filedata; 866 uid_t uid; 867 gid_t gid; 868 int error; 869 870 DPRINTF(CALL, ("udf_getattr called\n")); 871 872 /* update times before we returning values */ 873 udf_itimes(udf_node, NULL, NULL, NULL); 874 875 /* get descriptor information */ 876 if (fe) { 877 nlink = udf_rw16(fe->link_cnt); 878 uid = (uid_t)udf_rw32(fe->uid); 879 gid = (gid_t)udf_rw32(fe->gid); 880 filesize = udf_rw64(fe->inf_len); 881 blkssize = udf_rw64(fe->logblks_rec); 882 atime = &fe->atime; 883 mtime = &fe->mtime; 884 attrtime = &fe->attrtime; 885 filedata = fe->data; 886 887 /* initial guess */ 888 creatime = mtime; 889 890 /* check our extended attribute if present */ 891 error = udf_extattr_search_intern(udf_node, 892 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 893 if (!error) { 894 ft_extattr = (struct filetimes_extattr_entry *) 895 (filedata + offset); 896 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 897 creatime = &ft_extattr->times[0]; 898 } 899 } else { 900 assert(udf_node->efe); 901 nlink = udf_rw16(efe->link_cnt); 902 uid = (uid_t)udf_rw32(efe->uid); 903 gid = (gid_t)udf_rw32(efe->gid); 904 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 905 blkssize = udf_rw64(efe->logblks_rec); 906 atime = &efe->atime; 907 mtime = &efe->mtime; 908 attrtime = &efe->attrtime; 909 creatime = &efe->ctime; 910 filedata = efe->data; 911 } 912 913 /* do the uid/gid translation game */ 914 if (uid == (uid_t) -1) 915 uid = ump->mount_args.anon_uid; 916 if (gid == (gid_t) -1) 917 gid = ump->mount_args.anon_gid; 918 919 /* fill in struct vattr with values from the node */ 920 vattr_null(vap); 921 vap->va_type = vp->v_type; 922 vap->va_mode = udf_getaccessmode(udf_node); 923 vap->va_nlink = nlink; 924 vap->va_uid = uid; 925 vap->va_gid = gid; 926 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 927 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 928 vap->va_size = filesize; 929 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 930 931 /* 932 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 933 * 1 to the link count if its a directory we're requested attributes 934 * of. 935 */ 936 if (vap->va_type == VDIR) 937 vap->va_nlink++; 938 939 /* access times */ 940 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 941 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 942 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 943 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 944 945 vap->va_gen = 1; /* no multiple generations yes (!?) */ 946 vap->va_flags = 0; /* no flags */ 947 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 948 vap->va_filerev = 1; /* TODO file revision numbers? */ 949 vap->va_vaflags = 0; 950 /* TODO get vaflags from the extended attributes? */ 951 952 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 953 error = udf_extattr_search_intern(udf_node, 954 UDF_DEVICESPEC_ATTR_NO, "", 955 &offset, &a_l); 956 /* if error, deny access */ 957 if (error || (filedata == NULL)) { 958 vap->va_mode = 0; /* or v_type = VNON? */ 959 } else { 960 devattr = (struct device_extattr_entry *) 961 filedata + offset; 962 vap->va_rdev = makedev( 963 udf_rw32(devattr->major), 964 udf_rw32(devattr->minor) 965 ); 966 /* TODO we could check the implementator */ 967 } 968 } 969 970 return 0; 971 } 972 973 /* --------------------------------------------------------------------- */ 974 975 static int 976 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 977 kauth_cred_t cred) 978 { 979 struct udf_node *udf_node = VTOI(vp); 980 uid_t uid; 981 gid_t gid; 982 int error; 983 984 #ifdef notyet 985 /* TODO get vaflags from the extended attributes? */ 986 /* Immutable or append-only files cannot be modified, either. */ 987 if (udf_node->flags & (IMMUTABLE | APPEND)) 988 return EPERM; 989 #endif 990 991 if (vp->v_mount->mnt_flag & MNT_RDONLY) 992 return EROFS; 993 994 /* retrieve old values */ 995 udf_getownership(udf_node, &uid, &gid); 996 997 /* only one could be specified */ 998 if (new_uid == VNOVAL) 999 new_uid = uid; 1000 if (new_gid == VNOVAL) 1001 new_gid = gid; 1002 1003 /* check if we can fit it in an 32 bits */ 1004 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1005 return EINVAL; 1006 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1007 return EINVAL; 1008 1009 /* check permissions */ 1010 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1011 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1012 if (error) 1013 return (error); 1014 1015 /* change the ownership */ 1016 udf_setownership(udf_node, new_uid, new_gid); 1017 1018 /* mark node changed */ 1019 udf_node->i_flags |= IN_CHANGE; 1020 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1021 udf_node->i_flags |= IN_ACCESS; 1022 1023 return 0; 1024 } 1025 1026 1027 static int 1028 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1029 { 1030 struct udf_node *udf_node = VTOI(vp); 1031 uid_t uid; 1032 gid_t gid; 1033 int error; 1034 1035 #ifdef notyet 1036 /* TODO get vaflags from the extended attributes? */ 1037 /* Immutable or append-only files cannot be modified, either. */ 1038 if (udf_node->flags & (IMMUTABLE | APPEND)) 1039 return EPERM; 1040 #endif 1041 1042 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1043 return EROFS; 1044 1045 /* retrieve uid/gid values */ 1046 udf_getownership(udf_node, &uid, &gid); 1047 1048 /* check permissions */ 1049 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1050 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1051 if (error) 1052 return (error); 1053 1054 /* change mode */ 1055 udf_setaccessmode(udf_node, mode); 1056 1057 /* mark node changed */ 1058 udf_node->i_flags |= IN_CHANGE; 1059 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1060 udf_node->i_flags |= IN_ACCESS; 1061 1062 return 0; 1063 } 1064 1065 1066 /* exported */ 1067 int 1068 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1069 { 1070 struct udf_node *udf_node = VTOI(vp); 1071 int error, extended; 1072 1073 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1074 return EROFS; 1075 1076 /* Decide whether this is a valid operation based on the file type. */ 1077 switch (vp->v_type) { 1078 case VDIR: 1079 return EISDIR; 1080 case VREG: 1081 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1082 return EROFS; 1083 break; 1084 case VBLK: 1085 /* FALLTHROUGH */ 1086 case VCHR: 1087 /* FALLTHROUGH */ 1088 case VFIFO: 1089 /* Allow modifications of special files even if in the file 1090 * system is mounted read-only (we are not modifying the 1091 * files themselves, but the objects they represent). */ 1092 return 0; 1093 default: 1094 /* Anything else is unsupported. */ 1095 return EOPNOTSUPP; 1096 } 1097 1098 #if notyet 1099 /* TODO get vaflags from the extended attributes? */ 1100 /* Immutable or append-only files cannot be modified, either. */ 1101 if (node->flags & (IMMUTABLE | APPEND)) 1102 return EPERM; 1103 #endif 1104 1105 /* resize file to the requested size */ 1106 error = udf_resize_node(udf_node, newsize, &extended); 1107 1108 if (error == 0) { 1109 /* mark change */ 1110 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1111 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1112 udf_node->i_flags |= IN_ACCESS; 1113 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1114 udf_update(vp, NULL, NULL, NULL, 0); 1115 } 1116 1117 return error; 1118 } 1119 1120 1121 static int 1122 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1123 { 1124 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1125 return EROFS; 1126 1127 /* 1128 * XXX we can't do this yet, as its not described in the standard yet 1129 */ 1130 1131 return EOPNOTSUPP; 1132 } 1133 1134 1135 static int 1136 udf_chtimes(struct vnode *vp, 1137 struct timespec *atime, struct timespec *mtime, 1138 struct timespec *birthtime, int setattrflags, 1139 kauth_cred_t cred) 1140 { 1141 struct udf_node *udf_node = VTOI(vp); 1142 uid_t uid; 1143 gid_t gid; 1144 int error; 1145 1146 #ifdef notyet 1147 /* TODO get vaflags from the extended attributes? */ 1148 /* Immutable or append-only files cannot be modified, either. */ 1149 if (udf_node->flags & (IMMUTABLE | APPEND)) 1150 return EPERM; 1151 #endif 1152 1153 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1154 return EROFS; 1155 1156 /* retrieve uid/gid values */ 1157 udf_getownership(udf_node, &uid, &gid); 1158 1159 /* check permissions */ 1160 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1161 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1162 if (error) 1163 return (error); 1164 1165 /* update node flags depending on what times are passed */ 1166 if (atime->tv_sec != VNOVAL) 1167 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1168 udf_node->i_flags |= IN_ACCESS; 1169 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1170 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1171 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1172 udf_node->i_flags |= IN_ACCESS; 1173 } 1174 1175 return udf_update(vp, atime, mtime, birthtime, 0); 1176 } 1177 1178 1179 int 1180 udf_setattr(void *v) 1181 { 1182 struct vop_setattr_args /* { 1183 struct vnode *a_vp; 1184 struct vattr *a_vap; 1185 kauth_cred_t a_cred; 1186 struct lwp *a_l; 1187 } */ *ap = v; 1188 struct vnode *vp = ap->a_vp; 1189 /* struct udf_node *udf_node = VTOI(vp); */ 1190 /* struct udf_mount *ump = udf_node->ump; */ 1191 kauth_cred_t cred = ap->a_cred; 1192 struct vattr *vap = ap->a_vap; 1193 int error; 1194 1195 DPRINTF(CALL, ("udf_setattr called\n")); 1196 1197 /* Abort if any unsettable attribute is given. */ 1198 error = 0; 1199 if (vap->va_type != VNON || 1200 vap->va_nlink != VNOVAL || 1201 vap->va_fsid != VNOVAL || 1202 vap->va_fileid != VNOVAL || 1203 vap->va_blocksize != VNOVAL || 1204 #ifdef notyet 1205 /* checks are debated */ 1206 vap->va_ctime.tv_sec != VNOVAL || 1207 vap->va_ctime.tv_nsec != VNOVAL || 1208 vap->va_birthtime.tv_sec != VNOVAL || 1209 vap->va_birthtime.tv_nsec != VNOVAL || 1210 #endif 1211 vap->va_gen != VNOVAL || 1212 vap->va_rdev != VNOVAL || 1213 vap->va_bytes != VNOVAL) 1214 error = EINVAL; 1215 1216 DPRINTF(ATTR, ("setattr changing:\n")); 1217 if (error == 0 && (vap->va_flags != VNOVAL)) { 1218 DPRINTF(ATTR, ("\tchflags\n")); 1219 error = udf_chflags(vp, vap->va_flags, cred); 1220 } 1221 1222 if (error == 0 && (vap->va_size != VNOVAL)) { 1223 DPRINTF(ATTR, ("\tchsize\n")); 1224 error = udf_chsize(vp, vap->va_size, cred); 1225 } 1226 1227 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1228 DPRINTF(ATTR, ("\tchown\n")); 1229 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1230 } 1231 1232 if (error == 0 && (vap->va_mode != VNOVAL)) { 1233 DPRINTF(ATTR, ("\tchmod\n")); 1234 error = udf_chmod(vp, vap->va_mode, cred); 1235 } 1236 1237 if (error == 0 && 1238 ((vap->va_atime.tv_sec != VNOVAL && 1239 vap->va_atime.tv_nsec != VNOVAL) || 1240 (vap->va_mtime.tv_sec != VNOVAL && 1241 vap->va_mtime.tv_nsec != VNOVAL)) 1242 ) { 1243 DPRINTF(ATTR, ("\tchtimes\n")); 1244 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1245 &vap->va_birthtime, vap->va_vaflags, cred); 1246 } 1247 VN_KNOTE(vp, NOTE_ATTRIB); 1248 1249 return error; 1250 } 1251 1252 /* --------------------------------------------------------------------- */ 1253 1254 /* 1255 * Return POSIX pathconf information for UDF file systems. 1256 */ 1257 int 1258 udf_pathconf(void *v) 1259 { 1260 struct vop_pathconf_args /* { 1261 struct vnode *a_vp; 1262 int a_name; 1263 register_t *a_retval; 1264 } */ *ap = v; 1265 uint32_t bits; 1266 1267 DPRINTF(CALL, ("udf_pathconf called\n")); 1268 1269 switch (ap->a_name) { 1270 case _PC_LINK_MAX: 1271 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1272 return 0; 1273 case _PC_NAME_MAX: 1274 *ap->a_retval = UDF_MAXNAMLEN; 1275 return 0; 1276 case _PC_PATH_MAX: 1277 *ap->a_retval = PATH_MAX; 1278 return 0; 1279 case _PC_PIPE_BUF: 1280 *ap->a_retval = PIPE_BUF; 1281 return 0; 1282 case _PC_CHOWN_RESTRICTED: 1283 *ap->a_retval = 1; 1284 return 0; 1285 case _PC_NO_TRUNC: 1286 *ap->a_retval = 1; 1287 return 0; 1288 case _PC_SYNC_IO: 1289 *ap->a_retval = 0; /* synchronised is off for performance */ 1290 return 0; 1291 case _PC_FILESIZEBITS: 1292 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1293 bits = 64; /* XXX ought to deliver 65 */ 1294 #if 0 1295 if (udf_node) 1296 bits = 64 * vp->v_mount->mnt_dev_bshift; 1297 #endif 1298 *ap->a_retval = bits; 1299 return 0; 1300 } 1301 1302 return EINVAL; 1303 } 1304 1305 1306 /* --------------------------------------------------------------------- */ 1307 1308 int 1309 udf_open(void *v) 1310 { 1311 struct vop_open_args /* { 1312 struct vnode *a_vp; 1313 int a_mode; 1314 kauth_cred_t a_cred; 1315 struct proc *a_p; 1316 } */ *ap = v; 1317 int flags; 1318 1319 DPRINTF(CALL, ("udf_open called\n")); 1320 1321 /* 1322 * Files marked append-only must be opened for appending. 1323 * TODO: get chflags(2) flags from extened attribute. 1324 */ 1325 flags = 0; 1326 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1327 return (EPERM); 1328 1329 return 0; 1330 } 1331 1332 1333 /* --------------------------------------------------------------------- */ 1334 1335 int 1336 udf_close(void *v) 1337 { 1338 struct vop_close_args /* { 1339 struct vnode *a_vp; 1340 int a_fflag; 1341 kauth_cred_t a_cred; 1342 struct proc *a_p; 1343 } */ *ap = v; 1344 struct vnode *vp = ap->a_vp; 1345 struct udf_node *udf_node = VTOI(vp); 1346 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1347 int error; 1348 1349 DPRINTF(CALL, ("udf_close called\n")); 1350 udf_node = udf_node; /* shut up gcc */ 1351 1352 if (!async && (vp->v_type != VDIR)) { 1353 mutex_enter(vp->v_interlock); 1354 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1355 if (error) 1356 return error; 1357 } 1358 1359 mutex_enter(vp->v_interlock); 1360 if (vp->v_usecount > 1) 1361 udf_itimes(udf_node, NULL, NULL, NULL); 1362 mutex_exit(vp->v_interlock); 1363 1364 return 0; 1365 } 1366 1367 1368 /* --------------------------------------------------------------------- */ 1369 1370 static int 1371 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1372 { 1373 int flags; 1374 1375 /* check if we are allowed to write */ 1376 switch (vap->va_type) { 1377 case VDIR: 1378 case VLNK: 1379 case VREG: 1380 /* 1381 * normal nodes: check if we're on a read-only mounted 1382 * filingsystem and bomb out if we're trying to write. 1383 */ 1384 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1385 return EROFS; 1386 break; 1387 case VBLK: 1388 case VCHR: 1389 case VSOCK: 1390 case VFIFO: 1391 /* 1392 * special nodes: even on read-only mounted filingsystems 1393 * these are allowed to be written to if permissions allow. 1394 */ 1395 break; 1396 default: 1397 /* no idea what this is */ 1398 return EINVAL; 1399 } 1400 1401 /* noone may write immutable files */ 1402 /* TODO: get chflags(2) flags from extened attribute. */ 1403 flags = 0; 1404 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1405 return EPERM; 1406 1407 return 0; 1408 } 1409 1410 static int 1411 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1412 kauth_cred_t cred) 1413 { 1414 /* ask the generic genfs_can_access to advice on security */ 1415 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1416 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1417 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1418 } 1419 1420 int 1421 udf_access(void *v) 1422 { 1423 struct vop_access_args /* { 1424 struct vnode *a_vp; 1425 int a_mode; 1426 kauth_cred_t a_cred; 1427 struct proc *a_p; 1428 } */ *ap = v; 1429 struct vnode *vp = ap->a_vp; 1430 mode_t mode = ap->a_mode; 1431 kauth_cred_t cred = ap->a_cred; 1432 /* struct udf_node *udf_node = VTOI(vp); */ 1433 struct vattr vap; 1434 int error; 1435 1436 DPRINTF(CALL, ("udf_access called\n")); 1437 1438 error = VOP_GETATTR(vp, &vap, NULL); 1439 if (error) 1440 return error; 1441 1442 error = udf_check_possible(vp, &vap, mode); 1443 if (error) 1444 return error; 1445 1446 error = udf_check_permitted(vp, &vap, mode, cred); 1447 1448 return error; 1449 } 1450 1451 /* --------------------------------------------------------------------- */ 1452 1453 int 1454 udf_create(void *v) 1455 { 1456 struct vop_create_v3_args /* { 1457 struct vnode *a_dvp; 1458 struct vnode **a_vpp; 1459 struct componentname *a_cnp; 1460 struct vattr *a_vap; 1461 } */ *ap = v; 1462 struct vnode *dvp = ap->a_dvp; 1463 struct vnode **vpp = ap->a_vpp; 1464 struct vattr *vap = ap->a_vap; 1465 struct componentname *cnp = ap->a_cnp; 1466 int error; 1467 1468 DPRINTF(CALL, ("udf_create called\n")); 1469 error = udf_create_node(dvp, vpp, vap, cnp); 1470 1471 return error; 1472 } 1473 1474 /* --------------------------------------------------------------------- */ 1475 1476 int 1477 udf_mknod(void *v) 1478 { 1479 struct vop_mknod_v3_args /* { 1480 struct vnode *a_dvp; 1481 struct vnode **a_vpp; 1482 struct componentname *a_cnp; 1483 struct vattr *a_vap; 1484 } */ *ap = v; 1485 struct vnode *dvp = ap->a_dvp; 1486 struct vnode **vpp = ap->a_vpp; 1487 struct vattr *vap = ap->a_vap; 1488 struct componentname *cnp = ap->a_cnp; 1489 int error; 1490 1491 DPRINTF(CALL, ("udf_mknod called\n")); 1492 error = udf_create_node(dvp, vpp, vap, cnp); 1493 1494 return error; 1495 } 1496 1497 /* --------------------------------------------------------------------- */ 1498 1499 int 1500 udf_mkdir(void *v) 1501 { 1502 struct vop_mkdir_v3_args /* { 1503 struct vnode *a_dvp; 1504 struct vnode **a_vpp; 1505 struct componentname *a_cnp; 1506 struct vattr *a_vap; 1507 } */ *ap = v; 1508 struct vnode *dvp = ap->a_dvp; 1509 struct vnode **vpp = ap->a_vpp; 1510 struct vattr *vap = ap->a_vap; 1511 struct componentname *cnp = ap->a_cnp; 1512 int error; 1513 1514 DPRINTF(CALL, ("udf_mkdir called\n")); 1515 error = udf_create_node(dvp, vpp, vap, cnp); 1516 1517 return error; 1518 } 1519 1520 /* --------------------------------------------------------------------- */ 1521 1522 static int 1523 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1524 { 1525 struct udf_node *udf_node, *dir_node; 1526 struct vattr vap; 1527 int error; 1528 1529 DPRINTF(CALL, ("udf_link called\n")); 1530 KASSERT(dvp != vp); 1531 KASSERT(vp->v_type != VDIR); 1532 KASSERT(dvp->v_mount == vp->v_mount); 1533 1534 /* get attributes */ 1535 dir_node = VTOI(dvp); 1536 udf_node = VTOI(vp); 1537 1538 error = VOP_GETATTR(vp, &vap, FSCRED); 1539 if (error) { 1540 VOP_UNLOCK(vp); 1541 return error; 1542 } 1543 1544 /* check link count overflow */ 1545 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1546 VOP_UNLOCK(vp); 1547 return EMLINK; 1548 } 1549 1550 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1551 if (error) 1552 VOP_UNLOCK(vp); 1553 return error; 1554 } 1555 1556 int 1557 udf_link(void *v) 1558 { 1559 struct vop_link_args /* { 1560 struct vnode *a_dvp; 1561 struct vnode *a_vp; 1562 struct componentname *a_cnp; 1563 } */ *ap = v; 1564 struct vnode *dvp = ap->a_dvp; 1565 struct vnode *vp = ap->a_vp; 1566 struct componentname *cnp = ap->a_cnp; 1567 int error; 1568 1569 error = udf_do_link(dvp, vp, cnp); 1570 if (error) 1571 VOP_ABORTOP(dvp, cnp); 1572 1573 VN_KNOTE(vp, NOTE_LINK); 1574 VN_KNOTE(dvp, NOTE_WRITE); 1575 vput(dvp); 1576 1577 return error; 1578 } 1579 1580 /* --------------------------------------------------------------------- */ 1581 1582 static int 1583 udf_do_symlink(struct udf_node *udf_node, char *target) 1584 { 1585 struct pathcomp pathcomp; 1586 uint8_t *pathbuf, *pathpos, *compnamepos; 1587 char *mntonname; 1588 int pathlen, len, compnamelen, mntonnamelen; 1589 int error; 1590 1591 /* process `target' to an UDF structure */ 1592 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1593 pathpos = pathbuf; 1594 pathlen = 0; 1595 1596 if (*target == '/') { 1597 /* symlink starts from the root */ 1598 len = UDF_PATH_COMP_SIZE; 1599 memset(&pathcomp, 0, len); 1600 pathcomp.type = UDF_PATH_COMP_ROOT; 1601 1602 /* check if its mount-point relative! */ 1603 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1604 mntonnamelen = strlen(mntonname); 1605 if (strlen(target) >= mntonnamelen) { 1606 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1607 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1608 target += mntonnamelen; 1609 } 1610 } else { 1611 target++; 1612 } 1613 1614 memcpy(pathpos, &pathcomp, len); 1615 pathpos += len; 1616 pathlen += len; 1617 } 1618 1619 error = 0; 1620 while (*target) { 1621 /* ignore multiple '/' */ 1622 while (*target == '/') { 1623 target++; 1624 } 1625 if (!*target) 1626 break; 1627 1628 /* extract component name */ 1629 compnamelen = 0; 1630 compnamepos = target; 1631 while ((*target) && (*target != '/')) { 1632 target++; 1633 compnamelen++; 1634 } 1635 1636 /* just trunc if too long ?? (security issue) */ 1637 if (compnamelen >= 127) { 1638 error = ENAMETOOLONG; 1639 break; 1640 } 1641 1642 /* convert unix name to UDF name */ 1643 len = sizeof(struct pathcomp); 1644 memset(&pathcomp, 0, len); 1645 pathcomp.type = UDF_PATH_COMP_NAME; 1646 len = UDF_PATH_COMP_SIZE; 1647 1648 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1649 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1650 if ((compnamelen == 1) && (*compnamepos == '.')) 1651 pathcomp.type = UDF_PATH_COMP_CURDIR; 1652 1653 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1654 unix_to_udf_name( 1655 (char *) &pathcomp.ident, &pathcomp.l_ci, 1656 compnamepos, compnamelen, 1657 &udf_node->ump->logical_vol->desc_charset); 1658 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1659 } 1660 1661 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1662 error = ENAMETOOLONG; 1663 break; 1664 } 1665 1666 memcpy(pathpos, &pathcomp, len); 1667 pathpos += len; 1668 pathlen += len; 1669 } 1670 1671 if (error) { 1672 /* aparently too big */ 1673 free(pathbuf, M_UDFTEMP); 1674 return error; 1675 } 1676 1677 error = udf_grow_node(udf_node, pathlen); 1678 if (error) { 1679 /* failed to pregrow node */ 1680 free(pathbuf, M_UDFTEMP); 1681 return error; 1682 } 1683 1684 /* write out structure on the new file */ 1685 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1686 pathbuf, pathlen, 0, 1687 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1688 FSCRED, NULL, NULL); 1689 1690 /* return status of symlink contents writeout */ 1691 free(pathbuf, M_UDFTEMP); 1692 return error; 1693 } 1694 1695 1696 int 1697 udf_symlink(void *v) 1698 { 1699 struct vop_symlink_v3_args /* { 1700 struct vnode *a_dvp; 1701 struct vnode **a_vpp; 1702 struct componentname *a_cnp; 1703 struct vattr *a_vap; 1704 char *a_target; 1705 } */ *ap = v; 1706 struct vnode *dvp = ap->a_dvp; 1707 struct vnode **vpp = ap->a_vpp; 1708 struct vattr *vap = ap->a_vap; 1709 struct componentname *cnp = ap->a_cnp; 1710 struct udf_node *dir_node; 1711 struct udf_node *udf_node; 1712 int error; 1713 1714 DPRINTF(CALL, ("udf_symlink called\n")); 1715 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1716 error = udf_create_node(dvp, vpp, vap, cnp); 1717 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1718 if (!error) { 1719 dir_node = VTOI(dvp); 1720 udf_node = VTOI(*vpp); 1721 KASSERT(udf_node); 1722 error = udf_do_symlink(udf_node, ap->a_target); 1723 if (error) { 1724 /* remove node */ 1725 udf_shrink_node(udf_node, 0); 1726 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1727 } 1728 } 1729 return error; 1730 } 1731 1732 /* --------------------------------------------------------------------- */ 1733 1734 int 1735 udf_readlink(void *v) 1736 { 1737 struct vop_readlink_args /* { 1738 struct vnode *a_vp; 1739 struct uio *a_uio; 1740 kauth_cred_t a_cred; 1741 } */ *ap = v; 1742 struct vnode *vp = ap->a_vp; 1743 struct uio *uio = ap->a_uio; 1744 kauth_cred_t cred = ap->a_cred; 1745 struct udf_node *udf_node; 1746 struct pathcomp pathcomp; 1747 struct vattr vattr; 1748 uint8_t *pathbuf, *targetbuf, *tmpname; 1749 uint8_t *pathpos, *targetpos; 1750 char *mntonname; 1751 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1752 int first, error; 1753 1754 DPRINTF(CALL, ("udf_readlink called\n")); 1755 1756 udf_node = VTOI(vp); 1757 error = VOP_GETATTR(vp, &vattr, cred); 1758 if (error) 1759 return error; 1760 1761 /* claim temporary buffers for translation */ 1762 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1763 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1764 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1765 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1766 memset(targetbuf, 0, PATH_MAX); 1767 1768 /* read contents of file in our temporary buffer */ 1769 error = vn_rdwr(UIO_READ, udf_node->vnode, 1770 pathbuf, vattr.va_size, 0, 1771 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1772 FSCRED, NULL, NULL); 1773 if (error) { 1774 /* failed to read in symlink contents */ 1775 free(pathbuf, M_UDFTEMP); 1776 free(targetbuf, M_UDFTEMP); 1777 free(tmpname, M_UDFTEMP); 1778 return error; 1779 } 1780 1781 /* convert to a unix path */ 1782 pathpos = pathbuf; 1783 pathlen = 0; 1784 targetpos = targetbuf; 1785 targetlen = PATH_MAX; 1786 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1787 mntonnamelen = strlen(mntonname); 1788 1789 error = 0; 1790 first = 1; 1791 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1792 len = UDF_PATH_COMP_SIZE; 1793 memcpy(&pathcomp, pathpos, len); 1794 l_ci = pathcomp.l_ci; 1795 switch (pathcomp.type) { 1796 case UDF_PATH_COMP_ROOT : 1797 /* XXX should check for l_ci; bugcompatible now */ 1798 if ((targetlen < 1) || !first) { 1799 error = EINVAL; 1800 break; 1801 } 1802 *targetpos++ = '/'; targetlen--; 1803 break; 1804 case UDF_PATH_COMP_MOUNTROOT : 1805 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1806 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1807 error = EINVAL; 1808 break; 1809 } 1810 memcpy(targetpos, mntonname, mntonnamelen); 1811 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1812 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1813 /* more follows, so must be directory */ 1814 *targetpos++ = '/'; targetlen--; 1815 } 1816 break; 1817 case UDF_PATH_COMP_PARENTDIR : 1818 /* XXX should check for l_ci; bugcompatible now */ 1819 if (targetlen < 3) { 1820 error = EINVAL; 1821 break; 1822 } 1823 *targetpos++ = '.'; targetlen--; 1824 *targetpos++ = '.'; targetlen--; 1825 *targetpos++ = '/'; targetlen--; 1826 break; 1827 case UDF_PATH_COMP_CURDIR : 1828 /* XXX should check for l_ci; bugcompatible now */ 1829 if (targetlen < 2) { 1830 error = EINVAL; 1831 break; 1832 } 1833 *targetpos++ = '.'; targetlen--; 1834 *targetpos++ = '/'; targetlen--; 1835 break; 1836 case UDF_PATH_COMP_NAME : 1837 if (l_ci == 0) { 1838 error = EINVAL; 1839 break; 1840 } 1841 memset(tmpname, 0, PATH_MAX); 1842 memcpy(&pathcomp, pathpos, len + l_ci); 1843 udf_to_unix_name(tmpname, MAXPATHLEN, 1844 pathcomp.ident, l_ci, 1845 &udf_node->ump->logical_vol->desc_charset); 1846 namelen = strlen(tmpname); 1847 if (targetlen < namelen + 1) { 1848 error = EINVAL; 1849 break; 1850 } 1851 memcpy(targetpos, tmpname, namelen); 1852 targetpos += namelen; targetlen -= namelen; 1853 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1854 /* more follows, so must be directory */ 1855 *targetpos++ = '/'; targetlen--; 1856 } 1857 break; 1858 default : 1859 error = EINVAL; 1860 break; 1861 } 1862 first = 0; 1863 if (error) 1864 break; 1865 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1866 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1867 1868 } 1869 /* all processed? */ 1870 if (vattr.va_size - pathlen > 0) 1871 error = EINVAL; 1872 1873 /* uiomove() to destination */ 1874 if (!error) 1875 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1876 1877 free(pathbuf, M_UDFTEMP); 1878 free(targetbuf, M_UDFTEMP); 1879 free(tmpname, M_UDFTEMP); 1880 1881 return error; 1882 } 1883 1884 /* --------------------------------------------------------------------- */ 1885 1886 /* 1887 * udf_rename() moved to udf_rename.c 1888 */ 1889 1890 /* --------------------------------------------------------------------- */ 1891 1892 int 1893 udf_remove(void *v) 1894 { 1895 struct vop_remove_args /* { 1896 struct vnode *a_dvp; 1897 struct vnode *a_vp; 1898 struct componentname *a_cnp; 1899 } */ *ap = v; 1900 struct vnode *dvp = ap->a_dvp; 1901 struct vnode *vp = ap->a_vp; 1902 struct componentname *cnp = ap->a_cnp; 1903 struct udf_node *dir_node = VTOI(dvp); 1904 struct udf_node *udf_node = VTOI(vp); 1905 struct udf_mount *ump = dir_node->ump; 1906 int error; 1907 1908 DPRINTF(CALL, ("udf_remove called\n")); 1909 if (vp->v_type != VDIR) { 1910 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1911 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1912 } else { 1913 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1914 error = EPERM; 1915 } 1916 1917 if (error == 0) { 1918 VN_KNOTE(vp, NOTE_DELETE); 1919 VN_KNOTE(dvp, NOTE_WRITE); 1920 } 1921 1922 if (dvp == vp) 1923 vrele(vp); 1924 else 1925 vput(vp); 1926 vput(dvp); 1927 1928 return error; 1929 } 1930 1931 /* --------------------------------------------------------------------- */ 1932 1933 int 1934 udf_rmdir(void *v) 1935 { 1936 struct vop_rmdir_args /* { 1937 struct vnode *a_dvp; 1938 struct vnode *a_vp; 1939 struct componentname *a_cnp; 1940 } */ *ap = v; 1941 struct vnode *vp = ap->a_vp; 1942 struct vnode *dvp = ap->a_dvp; 1943 struct componentname *cnp = ap->a_cnp; 1944 struct udf_node *dir_node = VTOI(dvp); 1945 struct udf_node *udf_node = VTOI(vp); 1946 struct udf_mount *ump = dir_node->ump; 1947 int error, isempty; 1948 1949 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1950 1951 /* don't allow '.' to be deleted */ 1952 if (dir_node == udf_node) { 1953 vrele(dvp); 1954 vput(vp); 1955 return EINVAL; 1956 } 1957 1958 /* make sure our `leaf' node's hash is populated */ 1959 dirhash_get(&udf_node->dir_hash); 1960 error = udf_dirhash_fill(udf_node); 1961 if (error) { 1962 dirhash_put(udf_node->dir_hash); 1963 return error; 1964 } 1965 1966 /* check to see if the directory is empty */ 1967 isempty = dirhash_dir_isempty(udf_node->dir_hash); 1968 dirhash_put(udf_node->dir_hash); 1969 1970 if (!isempty) { 1971 vput(dvp); 1972 vput(vp); 1973 return ENOTEMPTY; 1974 } 1975 1976 /* detach the node from the directory, udf_node is an empty dir here */ 1977 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1978 if (error == 0) { 1979 cache_purge(vp); 1980 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1981 /* 1982 * Bug alert: we need to remove '..' from the detaching 1983 * udf_node so further lookups of this are not possible. This 1984 * prevents a process in a deleted directory from going to its 1985 * deleted parent. Since `udf_node' is garanteed to be empty 1986 * here, trunc it so no fids are there. 1987 */ 1988 dirhash_purge(&udf_node->dir_hash); 1989 udf_shrink_node(udf_node, 0); 1990 VN_KNOTE(vp, NOTE_DELETE); 1991 } 1992 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 1993 1994 /* unput the nodes and exit */ 1995 vput(dvp); 1996 vput(vp); 1997 1998 return error; 1999 } 2000 2001 /* --------------------------------------------------------------------- */ 2002 2003 int 2004 udf_fsync(void *v) 2005 { 2006 struct vop_fsync_args /* { 2007 struct vnode *a_vp; 2008 kauth_cred_t a_cred; 2009 int a_flags; 2010 off_t offlo; 2011 off_t offhi; 2012 struct proc *a_p; 2013 } */ *ap = v; 2014 struct vnode *vp = ap->a_vp; 2015 struct udf_node *udf_node = VTOI(vp); 2016 int error, flags, wait; 2017 2018 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2019 udf_node, 2020 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2021 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2022 2023 /* flush data and wait for it when requested */ 2024 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2025 error = vflushbuf(vp, ap->a_flags); 2026 if (error) 2027 return error; 2028 2029 if (udf_node == NULL) { 2030 printf("udf_fsync() called on NULL udf_node!\n"); 2031 return 0; 2032 } 2033 if (vp->v_tag != VT_UDF) { 2034 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2035 return 0; 2036 } 2037 2038 /* set our times */ 2039 udf_itimes(udf_node, NULL, NULL, NULL); 2040 2041 /* if called when mounted readonly, never write back */ 2042 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2043 return 0; 2044 2045 /* if only data is requested, return */ 2046 if (ap->a_flags & FSYNC_DATAONLY) 2047 return 0; 2048 2049 /* check if the node is dirty 'enough'*/ 2050 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2051 if (flags == 0) 2052 return 0; 2053 2054 /* if we don't have to wait, check for IO pending */ 2055 if (!wait) { 2056 if (vp->v_numoutput > 0) { 2057 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2058 return 0; 2059 } 2060 if (udf_node->outstanding_bufs > 0) { 2061 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2062 return 0; 2063 } 2064 if (udf_node->outstanding_nodedscr > 0) { 2065 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2066 return 0; 2067 } 2068 } 2069 2070 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2071 if (wait) { 2072 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2073 mutex_enter(vp->v_interlock); 2074 while (vp->v_numoutput) { 2075 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2076 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2077 } 2078 mutex_exit(vp->v_interlock); 2079 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2080 } 2081 2082 /* write out node and wait for it if requested */ 2083 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2084 error = udf_writeout_node(udf_node, wait); 2085 if (error) 2086 return error; 2087 2088 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2089 2090 return 0; 2091 } 2092 2093 /* --------------------------------------------------------------------- */ 2094 2095 int 2096 udf_advlock(void *v) 2097 { 2098 struct vop_advlock_args /* { 2099 struct vnode *a_vp; 2100 void *a_id; 2101 int a_op; 2102 struct flock *a_fl; 2103 int a_flags; 2104 } */ *ap = v; 2105 struct vnode *vp = ap->a_vp; 2106 struct udf_node *udf_node = VTOI(vp); 2107 struct file_entry *fe; 2108 struct extfile_entry *efe; 2109 uint64_t file_size; 2110 2111 DPRINTF(LOCKING, ("udf_advlock called\n")); 2112 2113 /* get directory filesize */ 2114 if (udf_node->fe) { 2115 fe = udf_node->fe; 2116 file_size = udf_rw64(fe->inf_len); 2117 } else { 2118 assert(udf_node->efe); 2119 efe = udf_node->efe; 2120 file_size = udf_rw64(efe->inf_len); 2121 } 2122 2123 return lf_advlock(ap, &udf_node->lockf, file_size); 2124 } 2125 2126 /* --------------------------------------------------------------------- */ 2127 2128 /* Global vfs vnode data structures for udfs */ 2129 int (**udf_vnodeop_p)(void *); 2130 2131 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2132 { &vop_default_desc, vn_default_error }, 2133 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2134 { &vop_create_desc, udf_create }, /* create */ 2135 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2136 { &vop_open_desc, udf_open }, /* open */ 2137 { &vop_close_desc, udf_close }, /* close */ 2138 { &vop_access_desc, udf_access }, /* access */ 2139 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2140 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2141 { &vop_read_desc, udf_read }, /* read */ 2142 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2143 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2144 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2145 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2146 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2147 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2148 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2149 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2150 { &vop_seek_desc, genfs_seek }, /* seek */ 2151 { &vop_remove_desc, udf_remove }, /* remove */ 2152 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2153 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2154 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2155 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2156 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2157 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2158 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2159 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2160 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2161 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2162 { &vop_lock_desc, genfs_lock }, /* lock */ 2163 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2164 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2165 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2166 /* { &vop_print_desc, udf_print }, */ /* print */ 2167 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2168 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2169 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2170 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2171 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2172 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2173 { NULL, NULL } 2174 }; 2175 2176 2177 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2178 &udf_vnodeop_p, udf_vnodeop_entries 2179 }; 2180