udf_vnops.c revision 1.95
1 /* $NetBSD: udf_vnops.c,v 1.95 2014/12/03 21:37:55 reinoud Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Generic parts are derived from software contributed to The NetBSD Foundation 28 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 29 * 2005 program. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __KERNEL_RCSID(0, "$NetBSD: udf_vnops.c,v 1.95 2014/12/03 21:37:55 reinoud Exp $"); 36 #endif /* not lint */ 37 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 43 #include <sys/kernel.h> 44 #include <sys/file.h> /* define FWRITE ... */ 45 #include <sys/stat.h> 46 #include <sys/buf.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/lockf.h> 54 #include <sys/kauth.h> 55 56 #include <miscfs/genfs/genfs.h> 57 #include <uvm/uvm_extern.h> 58 59 #include <fs/udf/ecma167-udf.h> 60 #include <fs/udf/udf_mount.h> 61 #include <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 /* forward declarations */ 71 static int udf_do_readlink(struct udf_node *udf_node, uint64_t filesize, 72 uint8_t *targetbuf, int *length); 73 74 /* externs */ 75 extern int prtactive; 76 77 /* implementations of vnode functions; table follows at end */ 78 /* --------------------------------------------------------------------- */ 79 80 int 81 udf_inactive(void *v) 82 { 83 struct vop_inactive_args /* { 84 struct vnode *a_vp; 85 bool *a_recycle; 86 } */ *ap = v; 87 struct vnode *vp = ap->a_vp; 88 struct udf_node *udf_node = VTOI(vp); 89 int refcnt; 90 91 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 92 93 if (udf_node == NULL) { 94 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 95 VOP_UNLOCK(vp); 96 return 0; 97 } 98 99 /* 100 * Optionally flush metadata to disc. If the file has not been 101 * referenced anymore in a directory we ought to free up the resources 102 * on disc if applicable. 103 */ 104 if (udf_node->fe) { 105 refcnt = udf_rw16(udf_node->fe->link_cnt); 106 } else { 107 assert(udf_node->efe); 108 refcnt = udf_rw16(udf_node->efe->link_cnt); 109 } 110 111 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 112 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 113 /* system nodes are not writen out on inactive, so flush */ 114 udf_node->i_flags = 0; 115 } 116 117 *ap->a_recycle = false; 118 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 119 /* remove this file's allocation */ 120 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 121 *ap->a_recycle = true; 122 udf_delete_node(udf_node); 123 VOP_UNLOCK(vp); 124 return 0; 125 } 126 127 /* write out its node */ 128 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 129 udf_update(vp, NULL, NULL, NULL, 0); 130 VOP_UNLOCK(vp); 131 132 return 0; 133 } 134 135 /* --------------------------------------------------------------------- */ 136 137 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 138 139 int 140 udf_reclaim(void *v) 141 { 142 struct vop_reclaim_args /* { 143 struct vnode *a_vp; 144 } */ *ap = v; 145 struct vnode *vp = ap->a_vp; 146 struct udf_node *udf_node = VTOI(vp); 147 148 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 149 if (prtactive && vp->v_usecount > 1) 150 vprint("udf_reclaim(): pushing active", vp); 151 152 if (udf_node == NULL) { 153 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 154 return 0; 155 } 156 157 /* update note for closure */ 158 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 159 160 /* async check to see if all node descriptors are written out */ 161 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 162 vprint("udf_reclaim(): waiting for writeout\n", vp); 163 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 164 } 165 166 /* dispose all node knowledge */ 167 udf_dispose_node(udf_node); 168 169 return 0; 170 } 171 172 /* --------------------------------------------------------------------- */ 173 174 int 175 udf_read(void *v) 176 { 177 struct vop_read_args /* { 178 struct vnode *a_vp; 179 struct uio *a_uio; 180 int a_ioflag; 181 kauth_cred_t a_cred; 182 } */ *ap = v; 183 struct vnode *vp = ap->a_vp; 184 struct uio *uio = ap->a_uio; 185 int ioflag = ap->a_ioflag; 186 int advice = IO_ADV_DECODE(ap->a_ioflag); 187 struct uvm_object *uobj; 188 struct udf_node *udf_node = VTOI(vp); 189 struct file_entry *fe; 190 struct extfile_entry *efe; 191 uint64_t file_size; 192 vsize_t len; 193 int error; 194 195 /* 196 * XXX reading from extended attributes not yet implemented. FreeBSD 197 * has it in mind to forward the IO_EXT read call to the 198 * VOP_READEXTATTR(). 199 */ 200 201 DPRINTF(READ, ("udf_read called\n")); 202 203 /* can this happen? some filingsystems have this check */ 204 if (uio->uio_offset < 0) 205 return EINVAL; 206 if (uio->uio_resid == 0) 207 return 0; 208 209 /* protect against rogue programs reading raw directories and links */ 210 if ((ioflag & IO_ALTSEMANTICS) == 0) { 211 if (vp->v_type == VDIR) 212 return EISDIR; 213 /* all but regular files just give EINVAL */ 214 if (vp->v_type != VREG) 215 return EINVAL; 216 } 217 218 assert(udf_node); 219 assert(udf_node->fe || udf_node->efe); 220 221 /* get file/directory filesize */ 222 if (udf_node->fe) { 223 fe = udf_node->fe; 224 file_size = udf_rw64(fe->inf_len); 225 } else { 226 assert(udf_node->efe); 227 efe = udf_node->efe; 228 file_size = udf_rw64(efe->inf_len); 229 } 230 231 /* read contents using buffercache */ 232 uobj = &vp->v_uobj; 233 error = 0; 234 while (uio->uio_resid > 0) { 235 /* reached end? */ 236 if (file_size <= uio->uio_offset) 237 break; 238 239 /* maximise length to file extremity */ 240 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 241 if (len == 0) 242 break; 243 244 /* ubc, here we come, prepare to trap */ 245 error = ubc_uiomove(uobj, uio, len, advice, 246 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 247 if (error) 248 break; 249 } 250 251 /* note access time unless not requested */ 252 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 253 udf_node->i_flags |= IN_ACCESS; 254 if ((ioflag & IO_SYNC) == IO_SYNC) 255 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 256 } 257 258 return error; 259 } 260 261 /* --------------------------------------------------------------------- */ 262 263 int 264 udf_write(void *v) 265 { 266 struct vop_write_args /* { 267 struct vnode *a_vp; 268 struct uio *a_uio; 269 int a_ioflag; 270 kauth_cred_t a_cred; 271 } */ *ap = v; 272 struct vnode *vp = ap->a_vp; 273 struct uio *uio = ap->a_uio; 274 int ioflag = ap->a_ioflag; 275 kauth_cred_t cred = ap->a_cred; 276 int advice = IO_ADV_DECODE(ap->a_ioflag); 277 struct uvm_object *uobj; 278 struct udf_node *udf_node = VTOI(vp); 279 struct file_entry *fe; 280 struct extfile_entry *efe; 281 uint64_t file_size, old_size, old_offset; 282 vsize_t len; 283 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 284 int error; 285 int resid, extended; 286 287 /* 288 * XXX writing to extended attributes not yet implemented. FreeBSD has 289 * it in mind to forward the IO_EXT read call to the 290 * VOP_READEXTATTR(). 291 */ 292 293 DPRINTF(WRITE, ("udf_write called\n")); 294 295 /* can this happen? some filingsystems have this check */ 296 if (uio->uio_offset < 0) 297 return EINVAL; 298 if (uio->uio_resid == 0) 299 return 0; 300 301 /* protect against rogue programs writing raw directories or links */ 302 if ((ioflag & IO_ALTSEMANTICS) == 0) { 303 if (vp->v_type == VDIR) 304 return EISDIR; 305 /* all but regular files just give EINVAL for now */ 306 if (vp->v_type != VREG) 307 return EINVAL; 308 } 309 310 assert(udf_node); 311 assert(udf_node->fe || udf_node->efe); 312 313 /* get file/directory filesize */ 314 if (udf_node->fe) { 315 fe = udf_node->fe; 316 file_size = udf_rw64(fe->inf_len); 317 } else { 318 assert(udf_node->efe); 319 efe = udf_node->efe; 320 file_size = udf_rw64(efe->inf_len); 321 } 322 old_size = file_size; 323 324 /* if explicitly asked to append, uio_offset can be wrong? */ 325 if (ioflag & IO_APPEND) 326 uio->uio_offset = file_size; 327 328 extended = (uio->uio_offset + uio->uio_resid > file_size); 329 if (extended) { 330 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 331 file_size, uio->uio_offset + uio->uio_resid)); 332 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 333 if (error) 334 return error; 335 file_size = uio->uio_offset + uio->uio_resid; 336 } 337 338 /* write contents using buffercache */ 339 uobj = &vp->v_uobj; 340 resid = uio->uio_resid; 341 error = 0; 342 343 uvm_vnp_setwritesize(vp, file_size); 344 old_offset = uio->uio_offset; 345 while (uio->uio_resid > 0) { 346 /* maximise length to file extremity */ 347 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 348 if (len == 0) 349 break; 350 351 genfs_node_wrlock(vp); 352 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 353 genfs_node_unlock(vp); 354 if (error) 355 break; 356 357 /* ubc, here we come, prepare to trap */ 358 error = ubc_uiomove(uobj, uio, len, advice, 359 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 360 if (error) 361 break; 362 363 /* 364 * flush what we just wrote if necessary. 365 * XXXUBC simplistic async flushing. 366 * 367 * Directories are excluded since its file data that we want 368 * to purge. 369 */ 370 if ((vp->v_type != VDIR) && 371 (old_offset >> 16 != uio->uio_offset >> 16)) { 372 mutex_enter(vp->v_interlock); 373 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 374 (uio->uio_offset >> 16) << 16, 375 PGO_CLEANIT | PGO_LAZY); 376 old_offset = uio->uio_offset; 377 } 378 } 379 uvm_vnp_setsize(vp, file_size); 380 381 /* mark node changed and request update */ 382 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 383 if (vp->v_mount->mnt_flag & MNT_RELATIME) 384 udf_node->i_flags |= IN_ACCESS; 385 386 /* 387 * XXX TODO FFS has code here to reset setuid & setgid when we're not 388 * the superuser as a precaution against tampering. 389 */ 390 391 /* if we wrote a thing, note write action on vnode */ 392 if (resid > uio->uio_resid) 393 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 394 395 if (error) { 396 /* bring back file size to its former size */ 397 /* take notice of its errors? */ 398 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 399 400 /* roll back uio */ 401 uio->uio_offset -= resid - uio->uio_resid; 402 uio->uio_resid = resid; 403 } else { 404 /* if we write and we're synchronous, update node */ 405 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 406 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 407 } 408 409 return error; 410 } 411 412 413 /* --------------------------------------------------------------------- */ 414 415 /* 416 * `Special' bmap functionality that translates all incomming requests to 417 * translate to vop_strategy() calls with the same blocknumbers effectively 418 * not translating at all. 419 */ 420 421 int 422 udf_trivial_bmap(void *v) 423 { 424 struct vop_bmap_args /* { 425 struct vnode *a_vp; 426 daddr_t a_bn; 427 struct vnode **a_vpp; 428 daddr_t *a_bnp; 429 int *a_runp; 430 } */ *ap = v; 431 struct vnode *vp = ap->a_vp; /* our node */ 432 struct vnode **vpp = ap->a_vpp; /* return node */ 433 daddr_t *bnp = ap->a_bnp; /* translated */ 434 daddr_t bn = ap->a_bn; /* origional */ 435 int *runp = ap->a_runp; 436 struct udf_node *udf_node = VTOI(vp); 437 uint32_t lb_size; 438 439 /* get logical block size */ 440 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 441 442 /* could return `-1' to indicate holes/zeros */ 443 /* translate 1:1 */ 444 *bnp = bn; 445 446 /* set the vnode to read the data from with strategy on itself */ 447 if (vpp) 448 *vpp = vp; 449 450 /* set runlength of maximum block size */ 451 if (runp) 452 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 453 454 /* return success */ 455 return 0; 456 } 457 458 /* --------------------------------------------------------------------- */ 459 460 int 461 udf_vfsstrategy(void *v) 462 { 463 struct vop_strategy_args /* { 464 struct vnode *a_vp; 465 struct buf *a_bp; 466 } */ *ap = v; 467 struct vnode *vp = ap->a_vp; 468 struct buf *bp = ap->a_bp; 469 struct udf_node *udf_node = VTOI(vp); 470 uint32_t lb_size, sectors; 471 472 DPRINTF(STRATEGY, ("udf_strategy called\n")); 473 474 /* check if we ought to be here */ 475 if (vp->v_type == VBLK || vp->v_type == VCHR) 476 panic("udf_strategy: spec"); 477 478 /* only filebuffers ought to be read/write by this, no descriptors */ 479 assert(bp->b_blkno >= 0); 480 481 /* get sector size */ 482 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 483 484 /* calculate length to fetch/store in sectors */ 485 sectors = bp->b_bcount / lb_size; 486 assert(bp->b_bcount > 0); 487 488 /* NEVER assume later that this buffer is already translated */ 489 /* bp->b_lblkno = bp->b_blkno; */ 490 491 /* check assertions: we OUGHT to always get multiples of this */ 492 assert(sectors * lb_size == bp->b_bcount); 493 __USE(sectors); 494 495 /* issue buffer */ 496 if (bp->b_flags & B_READ) { 497 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 498 ", for %d sectors\n", 499 vp, bp, bp->b_blkno, sectors)); 500 501 /* read buffer from the udf_node, translate vtop on the way*/ 502 udf_read_filebuf(udf_node, bp); 503 } else { 504 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 505 ", for %d sectors\n", 506 vp, bp, bp->b_blkno, sectors)); 507 508 /* write buffer to the udf_node, translate vtop on the way*/ 509 udf_write_filebuf(udf_node, bp); 510 } 511 512 return bp->b_error; 513 } 514 515 /* --------------------------------------------------------------------- */ 516 517 int 518 udf_readdir(void *v) 519 { 520 struct vop_readdir_args /* { 521 struct vnode *a_vp; 522 struct uio *a_uio; 523 kauth_cred_t a_cred; 524 int *a_eofflag; 525 off_t **a_cookies; 526 int *a_ncookies; 527 } */ *ap = v; 528 struct uio *uio = ap->a_uio; 529 struct vnode *vp = ap->a_vp; 530 struct udf_node *udf_node = VTOI(vp); 531 struct file_entry *fe; 532 struct extfile_entry *efe; 533 struct fileid_desc *fid; 534 struct dirent *dirent; 535 uint64_t file_size, diroffset, transoffset; 536 uint32_t lb_size; 537 int error; 538 539 DPRINTF(READDIR, ("udf_readdir called\n")); 540 541 /* This operation only makes sense on directory nodes. */ 542 if (vp->v_type != VDIR) 543 return ENOTDIR; 544 545 /* get directory filesize */ 546 if (udf_node->fe) { 547 fe = udf_node->fe; 548 file_size = udf_rw64(fe->inf_len); 549 } else { 550 assert(udf_node->efe); 551 efe = udf_node->efe; 552 file_size = udf_rw64(efe->inf_len); 553 } 554 555 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 556 557 /* 558 * Add `.' pseudo entry if at offset zero since its not in the fid 559 * stream 560 */ 561 if (uio->uio_offset == 0) { 562 DPRINTF(READDIR, ("\t'.' inserted\n")); 563 strcpy(dirent->d_name, "."); 564 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 565 dirent->d_type = DT_DIR; 566 dirent->d_namlen = strlen(dirent->d_name); 567 dirent->d_reclen = _DIRENT_SIZE(dirent); 568 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 569 570 /* mark with magic value that we have done the dummy */ 571 uio->uio_offset = UDF_DIRCOOKIE_DOT; 572 } 573 574 /* we are called just as long as we keep on pushing data in */ 575 error = 0; 576 if (uio->uio_offset < file_size) { 577 /* allocate temporary space for fid */ 578 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 579 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 580 581 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 582 uio->uio_offset = 0; 583 584 diroffset = uio->uio_offset; 585 transoffset = diroffset; 586 while (diroffset < file_size) { 587 DPRINTF(READDIR, ("\tread in fid stream\n")); 588 /* transfer a new fid/dirent */ 589 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 590 DPRINTFIF(READDIR, error, ("read error in read fid " 591 "stream : %d\n", error)); 592 if (error) 593 break; 594 595 /* 596 * If there isn't enough space in the uio to return a 597 * whole dirent, break off read 598 */ 599 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 600 break; 601 602 /* remember the last entry we transfered */ 603 transoffset = diroffset; 604 605 /* skip deleted entries */ 606 if (fid->file_char & UDF_FILE_CHAR_DEL) 607 continue; 608 609 /* skip not visible files */ 610 if (fid->file_char & UDF_FILE_CHAR_VIS) 611 continue; 612 613 /* copy dirent to the caller */ 614 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 615 dirent->d_name, dirent->d_type)); 616 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 617 } 618 619 /* pass on last transfered offset */ 620 uio->uio_offset = transoffset; 621 free(fid, M_UDFTEMP); 622 } 623 624 if (ap->a_eofflag) 625 *ap->a_eofflag = (uio->uio_offset >= file_size); 626 627 #ifdef DEBUG 628 if (udf_verbose & UDF_DEBUG_READDIR) { 629 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 630 if (ap->a_eofflag) 631 printf("returning EOF ? %d\n", *ap->a_eofflag); 632 if (error) 633 printf("readdir returning error %d\n", error); 634 } 635 #endif 636 637 free(dirent, M_UDFTEMP); 638 return error; 639 } 640 641 /* --------------------------------------------------------------------- */ 642 643 int 644 udf_lookup(void *v) 645 { 646 struct vop_lookup_v2_args /* { 647 struct vnode *a_dvp; 648 struct vnode **a_vpp; 649 struct componentname *a_cnp; 650 } */ *ap = v; 651 struct vnode *dvp = ap->a_dvp; 652 struct vnode **vpp = ap->a_vpp; 653 struct componentname *cnp = ap->a_cnp; 654 struct udf_node *dir_node, *res_node; 655 struct udf_mount *ump; 656 struct long_ad icb_loc; 657 mode_t mode; 658 uid_t d_uid; 659 gid_t d_gid; 660 const char *name; 661 int namelen, nameiop, islastcn, mounted_ro; 662 int error, found; 663 664 dir_node = VTOI(dvp); 665 ump = dir_node->ump; 666 *vpp = NULL; 667 668 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 669 cnp->cn_nameptr)); 670 671 /* simplify/clarification flags */ 672 nameiop = cnp->cn_nameiop; 673 islastcn = cnp->cn_flags & ISLASTCN; 674 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 675 676 /* check exec/dirread permissions first */ 677 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 678 if (error) 679 return error; 680 681 DPRINTF(LOOKUP, ("\taccess ok\n")); 682 683 /* 684 * If requesting a modify on the last path element on a read-only 685 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 686 */ 687 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 688 return EROFS; 689 690 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 691 cnp->cn_nameptr)); 692 /* look in the namecache */ 693 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 694 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 695 return *vpp == NULLVP ? ENOENT : 0; 696 } 697 698 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 699 700 /* 701 * Obviously, the file is not (anymore) in the namecache, we have to 702 * search for it. There are three basic cases: '.', '..' and others. 703 * 704 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 705 */ 706 error = 0; 707 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 708 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 709 /* special case 1 '.' */ 710 if (islastcn && cnp->cn_nameiop == RENAME) { 711 error = EISDIR; 712 goto out; 713 } 714 vref(dvp); 715 *vpp = dvp; 716 /* done */ 717 goto done; 718 } else if (cnp->cn_flags & ISDOTDOT) { 719 /* special case 2 '..' */ 720 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 721 722 if (islastcn && cnp->cn_nameiop == RENAME) { 723 error = EINVAL; 724 goto out; 725 } 726 727 /* get our node */ 728 name = ".."; 729 namelen = 2; 730 error = udf_lookup_name_in_dir(dvp, name, namelen, 731 &icb_loc, &found); 732 if (error) 733 goto out; 734 if (!found) 735 error = ENOENT; 736 737 /* first unlock parent */ 738 VOP_UNLOCK(dvp); 739 740 if (error == 0) { 741 DPRINTF(LOOKUP, ("\tfound '..'\n")); 742 /* try to create/reuse the node */ 743 error = udf_get_node(ump, &icb_loc, &res_node); 744 745 if (!error) { 746 DPRINTF(LOOKUP, 747 ("\tnode retrieved/created OK\n")); 748 *vpp = res_node->vnode; 749 } 750 } 751 752 /* try to relock parent */ 753 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 754 goto out; 755 } 756 757 /* all other files */ 758 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 759 760 /* lookup filename in the directory; location icb_loc */ 761 name = cnp->cn_nameptr; 762 namelen = cnp->cn_namelen; 763 error = udf_lookup_name_in_dir(dvp, name, namelen, 764 &icb_loc, &found); 765 if (error) 766 goto out; 767 if (!found) { 768 DPRINTF(LOOKUP, ("\tNOT found\n")); 769 /* 770 * The entry was not found in the directory. This is 771 * valid if we are creating or renaming an entry and 772 * are working on the last component of the path name. 773 */ 774 if (islastcn && (cnp->cn_nameiop == CREATE || 775 cnp->cn_nameiop == RENAME)) { 776 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 777 if (error) { 778 goto out; 779 } 780 error = EJUSTRETURN; 781 } else { 782 error = ENOENT; 783 } 784 /* done */ 785 goto done; 786 } 787 788 /* 789 * XXX NOTE tmpfs has a test here that tests that intermediate 790 * components i.e. not the last one ought to be either a directory or 791 * a link. It seems to function well without this code. 792 */ 793 794 /* try to create/reuse the node */ 795 error = udf_get_node(ump, &icb_loc, &res_node); 796 if (error) 797 goto out; 798 799 /* check permissions */ 800 if (islastcn && (cnp->cn_nameiop == DELETE || 801 cnp->cn_nameiop == RENAME) ) { 802 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 803 if (error) { 804 vput(res_node->vnode); 805 goto out; 806 } 807 808 /* 809 * Check if the directory has its sticky bit set. If so, ask 810 * for clearance since only the owner of a file or directory 811 * can remove/rename from taht directory. 812 */ 813 mode = udf_getaccessmode(dir_node); 814 if ((mode & S_ISTXT) != 0) { 815 udf_getownership(dir_node, &d_uid, &d_gid); 816 error = kauth_authorize_vnode(cnp->cn_cred, 817 KAUTH_VNODE_DELETE, res_node->vnode, 818 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 819 d_uid, d_uid)); 820 if (error) { 821 error = EPERM; 822 vput(res_node->vnode); 823 goto out; 824 } 825 } 826 } 827 828 *vpp = res_node->vnode; 829 830 done: 831 /* 832 * Store result in the cache if requested. If we are creating a file, 833 * the file might not be found and thus putting it into the namecache 834 * might be seen as negative caching. 835 */ 836 if (nameiop != CREATE) 837 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 838 cnp->cn_flags); 839 840 out: 841 if (error == 0 && *vpp != dvp) 842 VOP_UNLOCK(*vpp); 843 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 844 845 return error; 846 } 847 848 /* --------------------------------------------------------------------- */ 849 850 int 851 udf_getattr(void *v) 852 { 853 struct vop_getattr_args /* { 854 struct vnode *a_vp; 855 struct vattr *a_vap; 856 kauth_cred_t a_cred; 857 struct lwp *a_l; 858 } */ *ap = v; 859 struct vnode *vp = ap->a_vp; 860 struct udf_node *udf_node = VTOI(vp); 861 struct udf_mount *ump = udf_node->ump; 862 struct file_entry *fe = udf_node->fe; 863 struct extfile_entry *efe = udf_node->efe; 864 struct filetimes_extattr_entry *ft_extattr; 865 struct device_extattr_entry *devattr; 866 struct vattr *vap = ap->a_vap; 867 struct timestamp *atime, *mtime, *attrtime, *creatime; 868 uint64_t filesize, blkssize; 869 uint32_t nlink; 870 uint32_t offset, a_l; 871 uint8_t *filedata, *targetbuf; 872 uid_t uid; 873 gid_t gid; 874 int length, error; 875 876 DPRINTF(CALL, ("udf_getattr called\n")); 877 878 /* update times before we returning values */ 879 udf_itimes(udf_node, NULL, NULL, NULL); 880 881 /* get descriptor information */ 882 if (fe) { 883 nlink = udf_rw16(fe->link_cnt); 884 uid = (uid_t)udf_rw32(fe->uid); 885 gid = (gid_t)udf_rw32(fe->gid); 886 filesize = udf_rw64(fe->inf_len); 887 blkssize = udf_rw64(fe->logblks_rec); 888 atime = &fe->atime; 889 mtime = &fe->mtime; 890 attrtime = &fe->attrtime; 891 filedata = fe->data; 892 893 /* initial guess */ 894 creatime = mtime; 895 896 /* check our extended attribute if present */ 897 error = udf_extattr_search_intern(udf_node, 898 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 899 if (!error) { 900 ft_extattr = (struct filetimes_extattr_entry *) 901 (filedata + offset); 902 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 903 creatime = &ft_extattr->times[0]; 904 } 905 } else { 906 assert(udf_node->efe); 907 nlink = udf_rw16(efe->link_cnt); 908 uid = (uid_t)udf_rw32(efe->uid); 909 gid = (gid_t)udf_rw32(efe->gid); 910 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 911 blkssize = udf_rw64(efe->logblks_rec); 912 atime = &efe->atime; 913 mtime = &efe->mtime; 914 attrtime = &efe->attrtime; 915 creatime = &efe->ctime; 916 filedata = efe->data; 917 } 918 919 /* do the uid/gid translation game */ 920 if (uid == (uid_t) -1) 921 uid = ump->mount_args.anon_uid; 922 if (gid == (gid_t) -1) 923 gid = ump->mount_args.anon_gid; 924 925 /* fill in struct vattr with values from the node */ 926 vattr_null(vap); 927 vap->va_type = vp->v_type; 928 vap->va_mode = udf_getaccessmode(udf_node); 929 vap->va_nlink = nlink; 930 vap->va_uid = uid; 931 vap->va_gid = gid; 932 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 933 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 934 vap->va_size = filesize; 935 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 936 937 /* 938 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 939 * 1 to the link count if its a directory we're requested attributes 940 * of. 941 */ 942 if (vap->va_type == VDIR) 943 vap->va_nlink++; 944 945 /* 946 * BUG-ALERT: Posix requires the va_size to be pathlength for symbolic 947 * links. 948 */ 949 if (vap->va_type == VLNK) { 950 /* claim temporary buffers for translation */ 951 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 952 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 953 if (!error) { 954 vap->va_size = length; 955 KASSERT(length == strlen(targetbuf)); 956 } 957 free(targetbuf, M_UDFTEMP); 958 /* XXX return error? */ 959 } 960 961 /* access times */ 962 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 963 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 964 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 965 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 966 967 vap->va_gen = 1; /* no multiple generations yes (!?) */ 968 vap->va_flags = 0; /* no flags */ 969 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 970 vap->va_filerev = 1; /* TODO file revision numbers? */ 971 vap->va_vaflags = 0; 972 /* TODO get vaflags from the extended attributes? */ 973 974 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 975 error = udf_extattr_search_intern(udf_node, 976 UDF_DEVICESPEC_ATTR_NO, "", 977 &offset, &a_l); 978 /* if error, deny access */ 979 if (error || (filedata == NULL)) { 980 vap->va_mode = 0; /* or v_type = VNON? */ 981 } else { 982 devattr = (struct device_extattr_entry *) 983 filedata + offset; 984 vap->va_rdev = makedev( 985 udf_rw32(devattr->major), 986 udf_rw32(devattr->minor) 987 ); 988 /* TODO we could check the implementator */ 989 } 990 } 991 992 return 0; 993 } 994 995 /* --------------------------------------------------------------------- */ 996 997 static int 998 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 999 kauth_cred_t cred) 1000 { 1001 struct udf_node *udf_node = VTOI(vp); 1002 uid_t uid; 1003 gid_t gid; 1004 int error; 1005 1006 #ifdef notyet 1007 /* TODO get vaflags from the extended attributes? */ 1008 /* Immutable or append-only files cannot be modified, either. */ 1009 if (udf_node->flags & (IMMUTABLE | APPEND)) 1010 return EPERM; 1011 #endif 1012 1013 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1014 return EROFS; 1015 1016 /* retrieve old values */ 1017 udf_getownership(udf_node, &uid, &gid); 1018 1019 /* only one could be specified */ 1020 if (new_uid == VNOVAL) 1021 new_uid = uid; 1022 if (new_gid == VNOVAL) 1023 new_gid = gid; 1024 1025 /* check if we can fit it in an 32 bits */ 1026 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1027 return EINVAL; 1028 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1029 return EINVAL; 1030 1031 /* check permissions */ 1032 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1033 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1034 if (error) 1035 return (error); 1036 1037 /* change the ownership */ 1038 udf_setownership(udf_node, new_uid, new_gid); 1039 1040 /* mark node changed */ 1041 udf_node->i_flags |= IN_CHANGE; 1042 1043 return 0; 1044 } 1045 1046 1047 static int 1048 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1049 { 1050 struct udf_node *udf_node = VTOI(vp); 1051 uid_t uid; 1052 gid_t gid; 1053 int error; 1054 1055 #ifdef notyet 1056 /* TODO get vaflags from the extended attributes? */ 1057 /* Immutable or append-only files cannot be modified, either. */ 1058 if (udf_node->flags & (IMMUTABLE | APPEND)) 1059 return EPERM; 1060 #endif 1061 1062 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1063 return EROFS; 1064 1065 /* retrieve uid/gid values */ 1066 udf_getownership(udf_node, &uid, &gid); 1067 1068 /* check permissions */ 1069 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1070 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1071 if (error) 1072 return (error); 1073 1074 /* change mode */ 1075 udf_setaccessmode(udf_node, mode); 1076 1077 /* mark node changed */ 1078 udf_node->i_flags |= IN_CHANGE; 1079 1080 return 0; 1081 } 1082 1083 1084 /* exported */ 1085 int 1086 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1087 { 1088 struct udf_node *udf_node = VTOI(vp); 1089 int error, extended; 1090 1091 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1092 return EROFS; 1093 1094 /* Decide whether this is a valid operation based on the file type. */ 1095 switch (vp->v_type) { 1096 case VDIR: 1097 return EISDIR; 1098 case VREG: 1099 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1100 return EROFS; 1101 break; 1102 case VBLK: 1103 /* FALLTHROUGH */ 1104 case VCHR: 1105 /* FALLTHROUGH */ 1106 case VFIFO: 1107 /* Allow modifications of special files even if in the file 1108 * system is mounted read-only (we are not modifying the 1109 * files themselves, but the objects they represent). */ 1110 return 0; 1111 default: 1112 /* Anything else is unsupported. */ 1113 return EOPNOTSUPP; 1114 } 1115 1116 #if notyet 1117 /* TODO get vaflags from the extended attributes? */ 1118 /* Immutable or append-only files cannot be modified, either. */ 1119 if (node->flags & (IMMUTABLE | APPEND)) 1120 return EPERM; 1121 #endif 1122 1123 /* resize file to the requested size */ 1124 error = udf_resize_node(udf_node, newsize, &extended); 1125 1126 if (error == 0) { 1127 /* mark change */ 1128 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1129 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1130 udf_node->i_flags |= IN_ACCESS; 1131 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1132 udf_update(vp, NULL, NULL, NULL, 0); 1133 } 1134 1135 return error; 1136 } 1137 1138 1139 static int 1140 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1141 { 1142 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1143 return EROFS; 1144 1145 /* 1146 * XXX we can't do this yet, as its not described in the standard yet 1147 */ 1148 1149 return EOPNOTSUPP; 1150 } 1151 1152 1153 static int 1154 udf_chtimes(struct vnode *vp, 1155 struct timespec *atime, struct timespec *mtime, 1156 struct timespec *birthtime, int setattrflags, 1157 kauth_cred_t cred) 1158 { 1159 struct udf_node *udf_node = VTOI(vp); 1160 uid_t uid; 1161 gid_t gid; 1162 int error; 1163 1164 #ifdef notyet 1165 /* TODO get vaflags from the extended attributes? */ 1166 /* Immutable or append-only files cannot be modified, either. */ 1167 if (udf_node->flags & (IMMUTABLE | APPEND)) 1168 return EPERM; 1169 #endif 1170 1171 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1172 return EROFS; 1173 1174 /* retrieve uid/gid values */ 1175 udf_getownership(udf_node, &uid, &gid); 1176 1177 /* check permissions */ 1178 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1179 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1180 if (error) 1181 return (error); 1182 1183 /* update node flags depending on what times are passed */ 1184 if (atime->tv_sec != VNOVAL) 1185 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1186 udf_node->i_flags |= IN_ACCESS; 1187 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1188 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1189 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1190 udf_node->i_flags |= IN_ACCESS; 1191 } 1192 1193 return udf_update(vp, atime, mtime, birthtime, 0); 1194 } 1195 1196 1197 int 1198 udf_setattr(void *v) 1199 { 1200 struct vop_setattr_args /* { 1201 struct vnode *a_vp; 1202 struct vattr *a_vap; 1203 kauth_cred_t a_cred; 1204 struct lwp *a_l; 1205 } */ *ap = v; 1206 struct vnode *vp = ap->a_vp; 1207 /* struct udf_node *udf_node = VTOI(vp); */ 1208 /* struct udf_mount *ump = udf_node->ump; */ 1209 kauth_cred_t cred = ap->a_cred; 1210 struct vattr *vap = ap->a_vap; 1211 int error; 1212 1213 DPRINTF(CALL, ("udf_setattr called\n")); 1214 1215 /* Abort if any unsettable attribute is given. */ 1216 error = 0; 1217 if (vap->va_type != VNON || 1218 vap->va_nlink != VNOVAL || 1219 vap->va_fsid != VNOVAL || 1220 vap->va_fileid != VNOVAL || 1221 vap->va_blocksize != VNOVAL || 1222 #ifdef notyet 1223 /* checks are debated */ 1224 vap->va_ctime.tv_sec != VNOVAL || 1225 vap->va_ctime.tv_nsec != VNOVAL || 1226 vap->va_birthtime.tv_sec != VNOVAL || 1227 vap->va_birthtime.tv_nsec != VNOVAL || 1228 #endif 1229 vap->va_gen != VNOVAL || 1230 vap->va_rdev != VNOVAL || 1231 vap->va_bytes != VNOVAL) 1232 error = EINVAL; 1233 1234 DPRINTF(ATTR, ("setattr changing:\n")); 1235 if (error == 0 && (vap->va_flags != VNOVAL)) { 1236 DPRINTF(ATTR, ("\tchflags\n")); 1237 error = udf_chflags(vp, vap->va_flags, cred); 1238 } 1239 1240 if (error == 0 && (vap->va_size != VNOVAL)) { 1241 DPRINTF(ATTR, ("\tchsize\n")); 1242 error = udf_chsize(vp, vap->va_size, cred); 1243 } 1244 1245 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1246 DPRINTF(ATTR, ("\tchown\n")); 1247 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1248 } 1249 1250 if (error == 0 && (vap->va_mode != VNOVAL)) { 1251 DPRINTF(ATTR, ("\tchmod\n")); 1252 error = udf_chmod(vp, vap->va_mode, cred); 1253 } 1254 1255 if (error == 0 && 1256 ((vap->va_atime.tv_sec != VNOVAL && 1257 vap->va_atime.tv_nsec != VNOVAL) || 1258 (vap->va_mtime.tv_sec != VNOVAL && 1259 vap->va_mtime.tv_nsec != VNOVAL)) 1260 ) { 1261 DPRINTF(ATTR, ("\tchtimes\n")); 1262 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1263 &vap->va_birthtime, vap->va_vaflags, cred); 1264 } 1265 VN_KNOTE(vp, NOTE_ATTRIB); 1266 1267 return error; 1268 } 1269 1270 /* --------------------------------------------------------------------- */ 1271 1272 /* 1273 * Return POSIX pathconf information for UDF file systems. 1274 */ 1275 int 1276 udf_pathconf(void *v) 1277 { 1278 struct vop_pathconf_args /* { 1279 struct vnode *a_vp; 1280 int a_name; 1281 register_t *a_retval; 1282 } */ *ap = v; 1283 uint32_t bits; 1284 1285 DPRINTF(CALL, ("udf_pathconf called\n")); 1286 1287 switch (ap->a_name) { 1288 case _PC_LINK_MAX: 1289 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1290 return 0; 1291 case _PC_NAME_MAX: 1292 *ap->a_retval = UDF_MAXNAMLEN; 1293 return 0; 1294 case _PC_PATH_MAX: 1295 *ap->a_retval = PATH_MAX; 1296 return 0; 1297 case _PC_PIPE_BUF: 1298 *ap->a_retval = PIPE_BUF; 1299 return 0; 1300 case _PC_CHOWN_RESTRICTED: 1301 *ap->a_retval = 1; 1302 return 0; 1303 case _PC_NO_TRUNC: 1304 *ap->a_retval = 1; 1305 return 0; 1306 case _PC_SYNC_IO: 1307 *ap->a_retval = 0; /* synchronised is off for performance */ 1308 return 0; 1309 case _PC_FILESIZEBITS: 1310 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1311 bits = 64; /* XXX ought to deliver 65 */ 1312 #if 0 1313 if (udf_node) 1314 bits = 64 * vp->v_mount->mnt_dev_bshift; 1315 #endif 1316 *ap->a_retval = bits; 1317 return 0; 1318 } 1319 1320 return EINVAL; 1321 } 1322 1323 1324 /* --------------------------------------------------------------------- */ 1325 1326 int 1327 udf_open(void *v) 1328 { 1329 struct vop_open_args /* { 1330 struct vnode *a_vp; 1331 int a_mode; 1332 kauth_cred_t a_cred; 1333 struct proc *a_p; 1334 } */ *ap = v; 1335 int flags; 1336 1337 DPRINTF(CALL, ("udf_open called\n")); 1338 1339 /* 1340 * Files marked append-only must be opened for appending. 1341 * TODO: get chflags(2) flags from extened attribute. 1342 */ 1343 flags = 0; 1344 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1345 return (EPERM); 1346 1347 return 0; 1348 } 1349 1350 1351 /* --------------------------------------------------------------------- */ 1352 1353 int 1354 udf_close(void *v) 1355 { 1356 struct vop_close_args /* { 1357 struct vnode *a_vp; 1358 int a_fflag; 1359 kauth_cred_t a_cred; 1360 struct proc *a_p; 1361 } */ *ap = v; 1362 struct vnode *vp = ap->a_vp; 1363 struct udf_node *udf_node = VTOI(vp); 1364 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1365 int error; 1366 1367 DPRINTF(CALL, ("udf_close called\n")); 1368 udf_node = udf_node; /* shut up gcc */ 1369 1370 if (!async && (vp->v_type != VDIR)) { 1371 mutex_enter(vp->v_interlock); 1372 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1373 if (error) 1374 return error; 1375 } 1376 1377 mutex_enter(vp->v_interlock); 1378 if (vp->v_usecount > 1) 1379 udf_itimes(udf_node, NULL, NULL, NULL); 1380 mutex_exit(vp->v_interlock); 1381 1382 return 0; 1383 } 1384 1385 1386 /* --------------------------------------------------------------------- */ 1387 1388 static int 1389 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1390 { 1391 int flags; 1392 1393 /* check if we are allowed to write */ 1394 switch (vap->va_type) { 1395 case VDIR: 1396 case VLNK: 1397 case VREG: 1398 /* 1399 * normal nodes: check if we're on a read-only mounted 1400 * filingsystem and bomb out if we're trying to write. 1401 */ 1402 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1403 return EROFS; 1404 break; 1405 case VBLK: 1406 case VCHR: 1407 case VSOCK: 1408 case VFIFO: 1409 /* 1410 * special nodes: even on read-only mounted filingsystems 1411 * these are allowed to be written to if permissions allow. 1412 */ 1413 break; 1414 default: 1415 /* no idea what this is */ 1416 return EINVAL; 1417 } 1418 1419 /* noone may write immutable files */ 1420 /* TODO: get chflags(2) flags from extened attribute. */ 1421 flags = 0; 1422 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1423 return EPERM; 1424 1425 return 0; 1426 } 1427 1428 static int 1429 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1430 kauth_cred_t cred) 1431 { 1432 /* ask the generic genfs_can_access to advice on security */ 1433 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1434 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1435 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1436 } 1437 1438 int 1439 udf_access(void *v) 1440 { 1441 struct vop_access_args /* { 1442 struct vnode *a_vp; 1443 int a_mode; 1444 kauth_cred_t a_cred; 1445 struct proc *a_p; 1446 } */ *ap = v; 1447 struct vnode *vp = ap->a_vp; 1448 mode_t mode = ap->a_mode; 1449 kauth_cred_t cred = ap->a_cred; 1450 /* struct udf_node *udf_node = VTOI(vp); */ 1451 struct vattr vap; 1452 int error; 1453 1454 DPRINTF(CALL, ("udf_access called\n")); 1455 1456 error = VOP_GETATTR(vp, &vap, NULL); 1457 if (error) 1458 return error; 1459 1460 error = udf_check_possible(vp, &vap, mode); 1461 if (error) 1462 return error; 1463 1464 error = udf_check_permitted(vp, &vap, mode, cred); 1465 1466 return error; 1467 } 1468 1469 /* --------------------------------------------------------------------- */ 1470 1471 int 1472 udf_create(void *v) 1473 { 1474 struct vop_create_v3_args /* { 1475 struct vnode *a_dvp; 1476 struct vnode **a_vpp; 1477 struct componentname *a_cnp; 1478 struct vattr *a_vap; 1479 } */ *ap = v; 1480 struct vnode *dvp = ap->a_dvp; 1481 struct vnode **vpp = ap->a_vpp; 1482 struct vattr *vap = ap->a_vap; 1483 struct componentname *cnp = ap->a_cnp; 1484 int error; 1485 1486 DPRINTF(CALL, ("udf_create called\n")); 1487 error = udf_create_node(dvp, vpp, vap, cnp); 1488 1489 return error; 1490 } 1491 1492 /* --------------------------------------------------------------------- */ 1493 1494 int 1495 udf_mknod(void *v) 1496 { 1497 struct vop_mknod_v3_args /* { 1498 struct vnode *a_dvp; 1499 struct vnode **a_vpp; 1500 struct componentname *a_cnp; 1501 struct vattr *a_vap; 1502 } */ *ap = v; 1503 struct vnode *dvp = ap->a_dvp; 1504 struct vnode **vpp = ap->a_vpp; 1505 struct vattr *vap = ap->a_vap; 1506 struct componentname *cnp = ap->a_cnp; 1507 int error; 1508 1509 DPRINTF(CALL, ("udf_mknod called\n")); 1510 error = udf_create_node(dvp, vpp, vap, cnp); 1511 1512 return error; 1513 } 1514 1515 /* --------------------------------------------------------------------- */ 1516 1517 int 1518 udf_mkdir(void *v) 1519 { 1520 struct vop_mkdir_v3_args /* { 1521 struct vnode *a_dvp; 1522 struct vnode **a_vpp; 1523 struct componentname *a_cnp; 1524 struct vattr *a_vap; 1525 } */ *ap = v; 1526 struct vnode *dvp = ap->a_dvp; 1527 struct vnode **vpp = ap->a_vpp; 1528 struct vattr *vap = ap->a_vap; 1529 struct componentname *cnp = ap->a_cnp; 1530 int error; 1531 1532 DPRINTF(CALL, ("udf_mkdir called\n")); 1533 error = udf_create_node(dvp, vpp, vap, cnp); 1534 1535 return error; 1536 } 1537 1538 /* --------------------------------------------------------------------- */ 1539 1540 static int 1541 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1542 { 1543 struct udf_node *udf_node, *dir_node; 1544 struct vattr vap; 1545 int error; 1546 1547 DPRINTF(CALL, ("udf_link called\n")); 1548 KASSERT(dvp != vp); 1549 KASSERT(vp->v_type != VDIR); 1550 KASSERT(dvp->v_mount == vp->v_mount); 1551 1552 /* get attributes */ 1553 dir_node = VTOI(dvp); 1554 udf_node = VTOI(vp); 1555 1556 error = VOP_GETATTR(vp, &vap, FSCRED); 1557 if (error) { 1558 VOP_UNLOCK(vp); 1559 return error; 1560 } 1561 1562 /* check link count overflow */ 1563 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1564 VOP_UNLOCK(vp); 1565 return EMLINK; 1566 } 1567 1568 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1569 if (error) 1570 VOP_UNLOCK(vp); 1571 return error; 1572 } 1573 1574 int 1575 udf_link(void *v) 1576 { 1577 struct vop_link_args /* { 1578 struct vnode *a_dvp; 1579 struct vnode *a_vp; 1580 struct componentname *a_cnp; 1581 } */ *ap = v; 1582 struct vnode *dvp = ap->a_dvp; 1583 struct vnode *vp = ap->a_vp; 1584 struct componentname *cnp = ap->a_cnp; 1585 int error; 1586 1587 error = udf_do_link(dvp, vp, cnp); 1588 if (error) 1589 VOP_ABORTOP(dvp, cnp); 1590 1591 VN_KNOTE(vp, NOTE_LINK); 1592 VN_KNOTE(dvp, NOTE_WRITE); 1593 vput(dvp); 1594 1595 return error; 1596 } 1597 1598 /* --------------------------------------------------------------------- */ 1599 1600 static int 1601 udf_do_symlink(struct udf_node *udf_node, char *target) 1602 { 1603 struct pathcomp pathcomp; 1604 uint8_t *pathbuf, *pathpos, *compnamepos; 1605 char *mntonname; 1606 int pathlen, len, compnamelen, mntonnamelen; 1607 int error; 1608 1609 /* process `target' to an UDF structure */ 1610 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1611 pathpos = pathbuf; 1612 pathlen = 0; 1613 1614 if (*target == '/') { 1615 /* symlink starts from the root */ 1616 len = UDF_PATH_COMP_SIZE; 1617 memset(&pathcomp, 0, len); 1618 pathcomp.type = UDF_PATH_COMP_ROOT; 1619 1620 /* check if its mount-point relative! */ 1621 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1622 mntonnamelen = strlen(mntonname); 1623 if (strlen(target) >= mntonnamelen) { 1624 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1625 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1626 target += mntonnamelen; 1627 } 1628 } else { 1629 target++; 1630 } 1631 1632 memcpy(pathpos, &pathcomp, len); 1633 pathpos += len; 1634 pathlen += len; 1635 } 1636 1637 error = 0; 1638 while (*target) { 1639 /* ignore multiple '/' */ 1640 while (*target == '/') { 1641 target++; 1642 } 1643 if (!*target) 1644 break; 1645 1646 /* extract component name */ 1647 compnamelen = 0; 1648 compnamepos = target; 1649 while ((*target) && (*target != '/')) { 1650 target++; 1651 compnamelen++; 1652 } 1653 1654 /* just trunc if too long ?? (security issue) */ 1655 if (compnamelen >= 127) { 1656 error = ENAMETOOLONG; 1657 break; 1658 } 1659 1660 /* convert unix name to UDF name */ 1661 len = sizeof(struct pathcomp); 1662 memset(&pathcomp, 0, len); 1663 pathcomp.type = UDF_PATH_COMP_NAME; 1664 len = UDF_PATH_COMP_SIZE; 1665 1666 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1667 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1668 if ((compnamelen == 1) && (*compnamepos == '.')) 1669 pathcomp.type = UDF_PATH_COMP_CURDIR; 1670 1671 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1672 unix_to_udf_name( 1673 (char *) &pathcomp.ident, &pathcomp.l_ci, 1674 compnamepos, compnamelen, 1675 &udf_node->ump->logical_vol->desc_charset); 1676 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1677 } 1678 1679 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1680 error = ENAMETOOLONG; 1681 break; 1682 } 1683 1684 memcpy(pathpos, &pathcomp, len); 1685 pathpos += len; 1686 pathlen += len; 1687 } 1688 1689 if (error) { 1690 /* aparently too big */ 1691 free(pathbuf, M_UDFTEMP); 1692 return error; 1693 } 1694 1695 error = udf_grow_node(udf_node, pathlen); 1696 if (error) { 1697 /* failed to pregrow node */ 1698 free(pathbuf, M_UDFTEMP); 1699 return error; 1700 } 1701 1702 /* write out structure on the new file */ 1703 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1704 pathbuf, pathlen, 0, 1705 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1706 FSCRED, NULL, NULL); 1707 1708 /* return status of symlink contents writeout */ 1709 free(pathbuf, M_UDFTEMP); 1710 return error; 1711 } 1712 1713 1714 int 1715 udf_symlink(void *v) 1716 { 1717 struct vop_symlink_v3_args /* { 1718 struct vnode *a_dvp; 1719 struct vnode **a_vpp; 1720 struct componentname *a_cnp; 1721 struct vattr *a_vap; 1722 char *a_target; 1723 } */ *ap = v; 1724 struct vnode *dvp = ap->a_dvp; 1725 struct vnode **vpp = ap->a_vpp; 1726 struct vattr *vap = ap->a_vap; 1727 struct componentname *cnp = ap->a_cnp; 1728 struct udf_node *dir_node; 1729 struct udf_node *udf_node; 1730 int error; 1731 1732 DPRINTF(CALL, ("udf_symlink called\n")); 1733 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1734 error = udf_create_node(dvp, vpp, vap, cnp); 1735 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1736 if (!error) { 1737 dir_node = VTOI(dvp); 1738 udf_node = VTOI(*vpp); 1739 KASSERT(udf_node); 1740 error = udf_do_symlink(udf_node, ap->a_target); 1741 if (error) { 1742 /* remove node */ 1743 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1744 udf_delete_node(udf_node); 1745 } 1746 } 1747 return error; 1748 } 1749 1750 /* --------------------------------------------------------------------- */ 1751 1752 static int 1753 udf_do_readlink(struct udf_node *udf_node, uint64_t filesize, 1754 uint8_t *targetbuf, int *length) 1755 { 1756 struct pathcomp pathcomp; 1757 uint8_t *pathbuf, *tmpname; 1758 uint8_t *pathpos, *targetpos; 1759 char *mntonname; 1760 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1761 int first, error; 1762 1763 pathbuf = malloc(UDF_SYMLINKBUFLEN, 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, filesize, 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(tmpname, M_UDFTEMP); 1777 return error; 1778 } 1779 1780 /* convert to a unix path */ 1781 pathpos = pathbuf; 1782 pathlen = 0; 1783 targetpos = targetbuf; 1784 targetlen = PATH_MAX; 1785 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1786 mntonnamelen = strlen(mntonname); 1787 1788 error = 0; 1789 first = 1; 1790 while (filesize - pathlen >= UDF_PATH_COMP_SIZE) { 1791 len = UDF_PATH_COMP_SIZE; 1792 memcpy(&pathcomp, pathpos, len); 1793 l_ci = pathcomp.l_ci; 1794 switch (pathcomp.type) { 1795 case UDF_PATH_COMP_ROOT : 1796 /* XXX should check for l_ci; bugcompatible now */ 1797 if ((targetlen < 1) || !first) { 1798 error = EINVAL; 1799 break; 1800 } 1801 *targetpos++ = '/'; targetlen--; 1802 break; 1803 case UDF_PATH_COMP_MOUNTROOT : 1804 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1805 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1806 error = EINVAL; 1807 break; 1808 } 1809 memcpy(targetpos, mntonname, mntonnamelen); 1810 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1811 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1812 /* more follows, so must be directory */ 1813 *targetpos++ = '/'; targetlen--; 1814 } 1815 break; 1816 case UDF_PATH_COMP_PARENTDIR : 1817 /* XXX should check for l_ci; bugcompatible now */ 1818 if (targetlen < 3) { 1819 error = EINVAL; 1820 break; 1821 } 1822 *targetpos++ = '.'; targetlen--; 1823 *targetpos++ = '.'; targetlen--; 1824 *targetpos++ = '/'; targetlen--; 1825 break; 1826 case UDF_PATH_COMP_CURDIR : 1827 /* XXX should check for l_ci; bugcompatible now */ 1828 if (targetlen < 2) { 1829 error = EINVAL; 1830 break; 1831 } 1832 *targetpos++ = '.'; targetlen--; 1833 *targetpos++ = '/'; targetlen--; 1834 break; 1835 case UDF_PATH_COMP_NAME : 1836 if (l_ci == 0) { 1837 error = EINVAL; 1838 break; 1839 } 1840 memset(tmpname, 0, PATH_MAX); 1841 memcpy(&pathcomp, pathpos, len + l_ci); 1842 udf_to_unix_name(tmpname, MAXPATHLEN, 1843 pathcomp.ident, l_ci, 1844 &udf_node->ump->logical_vol->desc_charset); 1845 namelen = strlen(tmpname); 1846 if (targetlen < namelen + 1) { 1847 error = EINVAL; 1848 break; 1849 } 1850 memcpy(targetpos, tmpname, namelen); 1851 targetpos += namelen; targetlen -= namelen; 1852 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1853 /* more follows, so must be directory */ 1854 *targetpos++ = '/'; targetlen--; 1855 } 1856 break; 1857 default : 1858 error = EINVAL; 1859 break; 1860 } 1861 first = 0; 1862 if (error) 1863 break; 1864 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1865 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1866 1867 } 1868 /* all processed? */ 1869 if (filesize - pathlen > 0) 1870 error = EINVAL; 1871 1872 free(pathbuf, M_UDFTEMP); 1873 free(tmpname, M_UDFTEMP); 1874 1875 *length = PATH_MAX - targetlen; 1876 return error; 1877 } 1878 1879 1880 int 1881 udf_readlink(void *v) 1882 { 1883 struct vop_readlink_args /* { 1884 struct vnode *a_vp; 1885 struct uio *a_uio; 1886 kauth_cred_t a_cred; 1887 } */ *ap = v; 1888 struct vnode *vp = ap->a_vp; 1889 struct udf_node *udf_node = VTOI(vp); 1890 struct file_entry *fe = udf_node->fe; 1891 struct extfile_entry *efe = udf_node->efe; 1892 struct uio *uio = ap->a_uio; 1893 uint64_t filesize; 1894 uint8_t *targetbuf; 1895 int length; 1896 int error; 1897 1898 DPRINTF(CALL, ("udf_readlink called\n")); 1899 1900 if (fe) { 1901 filesize = udf_rw64(fe->inf_len); 1902 } else { 1903 assert(udf_node->efe); 1904 filesize = udf_rw64(efe->inf_len); 1905 } 1906 1907 /* claim temporary buffers for translation */ 1908 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1909 1910 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 1911 1912 /* uiomove() to destination */ 1913 if (!error) 1914 uiomove(targetbuf, length, uio); 1915 1916 free(targetbuf, M_UDFTEMP); 1917 return error; 1918 } 1919 1920 /* --------------------------------------------------------------------- */ 1921 1922 /* 1923 * udf_rename() moved to udf_rename.c 1924 */ 1925 1926 /* --------------------------------------------------------------------- */ 1927 1928 int 1929 udf_remove(void *v) 1930 { 1931 struct vop_remove_args /* { 1932 struct vnode *a_dvp; 1933 struct vnode *a_vp; 1934 struct componentname *a_cnp; 1935 } */ *ap = v; 1936 struct vnode *dvp = ap->a_dvp; 1937 struct vnode *vp = ap->a_vp; 1938 struct componentname *cnp = ap->a_cnp; 1939 struct udf_node *dir_node = VTOI(dvp); 1940 struct udf_node *udf_node = VTOI(vp); 1941 struct udf_mount *ump = dir_node->ump; 1942 int error; 1943 1944 DPRINTF(CALL, ("udf_remove called\n")); 1945 if (vp->v_type != VDIR) { 1946 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1947 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1948 } else { 1949 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1950 error = EPERM; 1951 } 1952 1953 if (error == 0) { 1954 VN_KNOTE(vp, NOTE_DELETE); 1955 VN_KNOTE(dvp, NOTE_WRITE); 1956 } 1957 1958 if (dvp == vp) 1959 vrele(vp); 1960 else 1961 vput(vp); 1962 vput(dvp); 1963 1964 return error; 1965 } 1966 1967 /* --------------------------------------------------------------------- */ 1968 1969 int 1970 udf_rmdir(void *v) 1971 { 1972 struct vop_rmdir_args /* { 1973 struct vnode *a_dvp; 1974 struct vnode *a_vp; 1975 struct componentname *a_cnp; 1976 } */ *ap = v; 1977 struct vnode *vp = ap->a_vp; 1978 struct vnode *dvp = ap->a_dvp; 1979 struct componentname *cnp = ap->a_cnp; 1980 struct udf_node *dir_node = VTOI(dvp); 1981 struct udf_node *udf_node = VTOI(vp); 1982 struct udf_mount *ump = dir_node->ump; 1983 int error, isempty; 1984 1985 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1986 1987 /* don't allow '.' to be deleted */ 1988 if (dir_node == udf_node) { 1989 vrele(dvp); 1990 vput(vp); 1991 return EINVAL; 1992 } 1993 1994 /* make sure our `leaf' node's hash is populated */ 1995 dirhash_get(&udf_node->dir_hash); 1996 error = udf_dirhash_fill(udf_node); 1997 if (error) { 1998 dirhash_put(udf_node->dir_hash); 1999 return error; 2000 } 2001 2002 /* check to see if the directory is empty */ 2003 isempty = dirhash_dir_isempty(udf_node->dir_hash); 2004 dirhash_put(udf_node->dir_hash); 2005 2006 if (!isempty) { 2007 vput(dvp); 2008 vput(vp); 2009 return ENOTEMPTY; 2010 } 2011 2012 /* detach the node from the directory, udf_node is an empty dir here */ 2013 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2014 if (error == 0) { 2015 cache_purge(vp); 2016 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2017 /* 2018 * Bug alert: we need to remove '..' from the detaching 2019 * udf_node so further lookups of this are not possible. This 2020 * prevents a process in a deleted directory from going to its 2021 * deleted parent. Since `udf_node' is garanteed to be empty 2022 * here, trunc it so no fids are there. 2023 */ 2024 dirhash_purge(&udf_node->dir_hash); 2025 udf_shrink_node(udf_node, 0); 2026 VN_KNOTE(vp, NOTE_DELETE); 2027 } 2028 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 2029 2030 /* unput the nodes and exit */ 2031 vput(dvp); 2032 vput(vp); 2033 2034 return error; 2035 } 2036 2037 /* --------------------------------------------------------------------- */ 2038 2039 int 2040 udf_fsync(void *v) 2041 { 2042 struct vop_fsync_args /* { 2043 struct vnode *a_vp; 2044 kauth_cred_t a_cred; 2045 int a_flags; 2046 off_t offlo; 2047 off_t offhi; 2048 struct proc *a_p; 2049 } */ *ap = v; 2050 struct vnode *vp = ap->a_vp; 2051 struct udf_node *udf_node = VTOI(vp); 2052 int error, flags, wait; 2053 2054 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2055 udf_node, 2056 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2057 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2058 2059 /* flush data and wait for it when requested */ 2060 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2061 error = vflushbuf(vp, ap->a_flags); 2062 if (error) 2063 return error; 2064 2065 if (udf_node == NULL) { 2066 printf("udf_fsync() called on NULL udf_node!\n"); 2067 return 0; 2068 } 2069 if (vp->v_tag != VT_UDF) { 2070 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2071 return 0; 2072 } 2073 2074 /* set our times */ 2075 udf_itimes(udf_node, NULL, NULL, NULL); 2076 2077 /* if called when mounted readonly, never write back */ 2078 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2079 return 0; 2080 2081 /* if only data is requested, return */ 2082 if (ap->a_flags & FSYNC_DATAONLY) 2083 return 0; 2084 2085 /* check if the node is dirty 'enough'*/ 2086 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2087 if (flags == 0) 2088 return 0; 2089 2090 /* if we don't have to wait, check for IO pending */ 2091 if (!wait) { 2092 if (vp->v_numoutput > 0) { 2093 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2094 return 0; 2095 } 2096 if (udf_node->outstanding_bufs > 0) { 2097 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2098 return 0; 2099 } 2100 if (udf_node->outstanding_nodedscr > 0) { 2101 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2102 return 0; 2103 } 2104 } 2105 2106 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2107 if (wait) { 2108 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2109 mutex_enter(vp->v_interlock); 2110 while (vp->v_numoutput) { 2111 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2112 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2113 } 2114 mutex_exit(vp->v_interlock); 2115 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2116 } 2117 2118 /* write out node and wait for it if requested */ 2119 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2120 error = udf_writeout_node(udf_node, wait); 2121 if (error) 2122 return error; 2123 2124 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2125 2126 return 0; 2127 } 2128 2129 /* --------------------------------------------------------------------- */ 2130 2131 int 2132 udf_advlock(void *v) 2133 { 2134 struct vop_advlock_args /* { 2135 struct vnode *a_vp; 2136 void *a_id; 2137 int a_op; 2138 struct flock *a_fl; 2139 int a_flags; 2140 } */ *ap = v; 2141 struct vnode *vp = ap->a_vp; 2142 struct udf_node *udf_node = VTOI(vp); 2143 struct file_entry *fe; 2144 struct extfile_entry *efe; 2145 uint64_t file_size; 2146 2147 DPRINTF(LOCKING, ("udf_advlock called\n")); 2148 2149 /* get directory filesize */ 2150 if (udf_node->fe) { 2151 fe = udf_node->fe; 2152 file_size = udf_rw64(fe->inf_len); 2153 } else { 2154 assert(udf_node->efe); 2155 efe = udf_node->efe; 2156 file_size = udf_rw64(efe->inf_len); 2157 } 2158 2159 return lf_advlock(ap, &udf_node->lockf, file_size); 2160 } 2161 2162 /* --------------------------------------------------------------------- */ 2163 2164 /* Global vfs vnode data structures for udfs */ 2165 int (**udf_vnodeop_p)(void *); 2166 2167 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2168 { &vop_default_desc, vn_default_error }, 2169 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2170 { &vop_create_desc, udf_create }, /* create */ 2171 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2172 { &vop_open_desc, udf_open }, /* open */ 2173 { &vop_close_desc, udf_close }, /* close */ 2174 { &vop_access_desc, udf_access }, /* access */ 2175 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2176 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2177 { &vop_read_desc, udf_read }, /* read */ 2178 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2179 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 2180 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 2181 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2182 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2183 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2184 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2185 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2186 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2187 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2188 { &vop_seek_desc, genfs_seek }, /* seek */ 2189 { &vop_remove_desc, udf_remove }, /* remove */ 2190 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2191 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2192 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2193 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2194 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2195 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2196 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2197 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2198 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2199 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2200 { &vop_lock_desc, genfs_lock }, /* lock */ 2201 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2202 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2203 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2204 /* { &vop_print_desc, udf_print }, */ /* print */ 2205 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2206 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2207 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2208 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2209 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2210 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2211 { NULL, NULL } 2212 }; 2213 2214 2215 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2216 &udf_vnodeop_p, udf_vnodeop_entries 2217 }; 2218
Indexes created Thu Oct 02 14:10:14 GMT 2025