1 /* $NetBSD: udf_vnops.c,v 1.127 2023/06/27 09:58:50 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 1.127 2023/06/27 09:58:50 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 /* implementations of vnode functions; table follows at end */ 75 /* --------------------------------------------------------------------- */ 76 77 int 78 udf_inactive(void *v) 79 { 80 struct vop_inactive_v2_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 return 0; 93 } 94 95 /* 96 * Optionally flush metadata to disc. 97 */ 98 if (udf_node->fe) { 99 refcnt = udf_rw16(udf_node->fe->link_cnt); 100 } else { 101 assert(udf_node->efe); 102 refcnt = udf_rw16(udf_node->efe->link_cnt); 103 } 104 105 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 106 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 107 /* system nodes are not written out on inactive, so flush */ 108 udf_node->i_flags = 0; 109 } 110 111 *ap->a_recycle = false; 112 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 113 *ap->a_recycle = true; 114 return 0; 115 } 116 117 /* write out its node */ 118 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 119 udf_update(vp, NULL, NULL, NULL, 0); 120 121 return 0; 122 } 123 124 /* --------------------------------------------------------------------- */ 125 126 int 127 udf_reclaim(void *v) 128 { 129 struct vop_reclaim_v2_args /* { 130 struct vnode *a_vp; 131 } */ *ap = v; 132 struct vnode *vp = ap->a_vp; 133 struct udf_node *udf_node = VTOI(vp); 134 int refcnt; 135 136 VOP_UNLOCK(vp); 137 138 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 139 140 if (udf_node == NULL) { 141 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 142 return 0; 143 } 144 145 /* 146 * If the file has not been referenced anymore in a directory 147 * we ought to free up the resources on disc if applicable. 148 */ 149 if (udf_node->fe) { 150 refcnt = udf_rw16(udf_node->fe->link_cnt); 151 } else { 152 assert(udf_node->efe); 153 refcnt = udf_rw16(udf_node->efe->link_cnt); 154 } 155 156 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 157 /* remove this file's allocation */ 158 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 159 udf_delete_node(udf_node); 160 } 161 162 /* update note for closure */ 163 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 164 165 /* async check to see if all node descriptors are written out */ 166 mutex_enter(&udf_node->node_mutex); 167 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 168 vprint("udf_reclaim(): waiting for writeout\n", vp); 169 cv_timedwait(&udf_node->node_lock, &udf_node->node_mutex, hz/8); 170 } 171 mutex_exit(&udf_node->node_mutex); 172 173 /* dispose all node knowledge */ 174 udf_dispose_node(udf_node); 175 176 return 0; 177 } 178 179 /* --------------------------------------------------------------------- */ 180 181 int 182 udf_read(void *v) 183 { 184 struct vop_read_args /* { 185 struct vnode *a_vp; 186 struct uio *a_uio; 187 int a_ioflag; 188 kauth_cred_t a_cred; 189 } */ *ap = v; 190 struct vnode *vp = ap->a_vp; 191 struct uio *uio = ap->a_uio; 192 int ioflag = ap->a_ioflag; 193 int advice = IO_ADV_DECODE(ap->a_ioflag); 194 struct uvm_object *uobj; 195 struct udf_node *udf_node = VTOI(vp); 196 struct file_entry *fe; 197 struct extfile_entry *efe; 198 uint64_t file_size; 199 vsize_t len; 200 int error; 201 202 /* 203 * XXX reading from extended attributes not yet implemented. FreeBSD 204 * has it in mind to forward the IO_EXT read call to the 205 * VOP_READEXTATTR(). 206 */ 207 208 DPRINTF(READ, ("udf_read called\n")); 209 210 /* can this happen? some filingsystems have this check */ 211 if (uio->uio_offset < 0) 212 return EINVAL; 213 if (uio->uio_resid == 0) 214 return 0; 215 216 /* protect against rogue programs reading raw directories and links */ 217 if ((ioflag & IO_ALTSEMANTICS) == 0) { 218 if (vp->v_type == VDIR) 219 return EISDIR; 220 /* all but regular files just give EINVAL */ 221 if (vp->v_type != VREG) 222 return EINVAL; 223 } 224 225 assert(udf_node); 226 assert(udf_node->fe || udf_node->efe); 227 228 /* get file/directory filesize */ 229 if (udf_node->fe) { 230 fe = udf_node->fe; 231 file_size = udf_rw64(fe->inf_len); 232 } else { 233 assert(udf_node->efe); 234 efe = udf_node->efe; 235 file_size = udf_rw64(efe->inf_len); 236 } 237 238 /* read contents using buffercache */ 239 uobj = &vp->v_uobj; 240 error = 0; 241 while (uio->uio_resid > 0) { 242 /* reached end? */ 243 if (file_size <= uio->uio_offset) 244 break; 245 246 /* maximise length to file extremity */ 247 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 248 if (len == 0) 249 break; 250 251 /* ubc, here we come, prepare to trap */ 252 error = ubc_uiomove(uobj, uio, len, advice, 253 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 254 if (error) 255 break; 256 } 257 258 /* note access time unless not requested */ 259 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 260 udf_node->i_flags |= IN_ACCESS; 261 if ((ioflag & IO_SYNC) == IO_SYNC) { 262 int uerror; 263 264 uerror = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 265 if (error == 0) 266 error = uerror; 267 } 268 } 269 270 return error; 271 } 272 273 /* --------------------------------------------------------------------- */ 274 275 int 276 udf_write(void *v) 277 { 278 struct vop_write_args /* { 279 struct vnode *a_vp; 280 struct uio *a_uio; 281 int a_ioflag; 282 kauth_cred_t a_cred; 283 } */ *ap = v; 284 struct vnode *vp = ap->a_vp; 285 struct uio *uio = ap->a_uio; 286 int ioflag = ap->a_ioflag; 287 kauth_cred_t cred = ap->a_cred; 288 int advice = IO_ADV_DECODE(ap->a_ioflag); 289 struct uvm_object *uobj; 290 struct udf_node *udf_node = VTOI(vp); 291 struct file_entry *fe; 292 struct extfile_entry *efe; 293 uint64_t file_size, old_size, old_offset; 294 vsize_t len; 295 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 296 int error; 297 int resid, extended; 298 299 /* 300 * XXX writing to extended attributes not yet implemented. FreeBSD has 301 * it in mind to forward the IO_EXT read call to the 302 * VOP_READEXTATTR(). 303 */ 304 305 DPRINTF(WRITE, ("udf_write called\n")); 306 307 /* can this happen? some filingsystems have this check */ 308 if (uio->uio_offset < 0) 309 return EINVAL; 310 if (uio->uio_resid == 0) 311 return 0; 312 313 /* protect against rogue programs writing raw directories or links */ 314 if ((ioflag & IO_ALTSEMANTICS) == 0) { 315 if (vp->v_type == VDIR) 316 return EISDIR; 317 /* all but regular files just give EINVAL for now */ 318 if (vp->v_type != VREG) 319 return EINVAL; 320 } 321 322 assert(udf_node); 323 assert(udf_node->fe || udf_node->efe); 324 325 /* get file/directory filesize */ 326 if (udf_node->fe) { 327 fe = udf_node->fe; 328 file_size = udf_rw64(fe->inf_len); 329 } else { 330 assert(udf_node->efe); 331 efe = udf_node->efe; 332 file_size = udf_rw64(efe->inf_len); 333 } 334 old_size = file_size; 335 336 /* if explicitly asked to append, uio_offset can be wrong? */ 337 if (ioflag & IO_APPEND) 338 uio->uio_offset = file_size; 339 340 extended = (uio->uio_offset + uio->uio_resid > file_size); 341 if (extended) { 342 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 343 file_size, uio->uio_offset + uio->uio_resid)); 344 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 345 if (error) 346 return error; 347 file_size = uio->uio_offset + uio->uio_resid; 348 } 349 350 /* write contents using buffercache */ 351 uobj = &vp->v_uobj; 352 resid = uio->uio_resid; 353 error = 0; 354 355 uvm_vnp_setwritesize(vp, file_size); 356 old_offset = uio->uio_offset; 357 while (uio->uio_resid > 0) { 358 /* maximise length to file extremity */ 359 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 360 if (len == 0) 361 break; 362 363 genfs_node_wrlock(vp); 364 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 365 genfs_node_unlock(vp); 366 if (error) 367 break; 368 369 /* ubc, here we come, prepare to trap */ 370 error = ubc_uiomove(uobj, uio, len, advice, 371 UBC_WRITE | UBC_VNODE_FLAGS(vp)); 372 if (error) 373 break; 374 375 /* 376 * flush what we just wrote if necessary. 377 * XXXUBC simplistic async flushing. 378 * 379 * Directories are excluded since its file data that we want 380 * to purge. 381 */ 382 if ((vp->v_type != VDIR) && 383 (old_offset >> 16 != uio->uio_offset >> 16)) { 384 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 385 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 386 (uio->uio_offset >> 16) << 16, 387 PGO_CLEANIT | PGO_LAZY); 388 old_offset = uio->uio_offset; 389 } 390 } 391 uvm_vnp_setsize(vp, file_size); 392 393 /* mark node changed and request update */ 394 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 395 if (vp->v_mount->mnt_flag & MNT_RELATIME) 396 udf_node->i_flags |= IN_ACCESS; 397 398 /* 399 * XXX TODO FFS has code here to reset setuid & setgid when we're not 400 * the superuser as a precaution against tampering. 401 */ 402 403 if (error) { 404 /* bring back file size to its former size */ 405 /* take notice of its errors? */ 406 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 407 408 /* roll back uio */ 409 uio->uio_offset -= resid - uio->uio_resid; 410 uio->uio_resid = resid; 411 } else { 412 /* if we write and we're synchronous, update node */ 413 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 414 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 415 } 416 417 return error; 418 } 419 420 421 /* --------------------------------------------------------------------- */ 422 423 /* 424 * `Special' bmap functionality that translates all incoming requests to 425 * translate to vop_strategy() calls with the same blocknumbers effectively 426 * not translating at all. 427 */ 428 429 int 430 udf_trivial_bmap(void *v) 431 { 432 struct vop_bmap_args /* { 433 struct vnode *a_vp; 434 daddr_t a_bn; 435 struct vnode **a_vpp; 436 daddr_t *a_bnp; 437 int *a_runp; 438 } */ *ap = v; 439 struct vnode *vp = ap->a_vp; /* our node */ 440 struct vnode **vpp = ap->a_vpp; /* return node */ 441 daddr_t *bnp = ap->a_bnp; /* translated */ 442 daddr_t bn = ap->a_bn; /* original */ 443 int *runp = ap->a_runp; 444 struct udf_node *udf_node = VTOI(vp); 445 uint32_t lb_size; 446 447 /* get logical block size */ 448 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 449 450 /* could return `-1' to indicate holes/zeros */ 451 /* translate 1:1 */ 452 *bnp = bn; 453 454 /* set the vnode to read the data from with strategy on itself */ 455 if (vpp) 456 *vpp = vp; 457 458 /* set runlength of maximum block size */ 459 if (runp) 460 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 461 462 /* return success */ 463 return 0; 464 } 465 466 /* --------------------------------------------------------------------- */ 467 468 int 469 udf_vfsstrategy(void *v) 470 { 471 struct vop_strategy_args /* { 472 struct vnode *a_vp; 473 struct buf *a_bp; 474 } */ *ap = v; 475 struct vnode *vp = ap->a_vp; 476 struct buf *bp = ap->a_bp; 477 struct udf_node *udf_node = VTOI(vp); 478 uint32_t lb_size, sectors; 479 480 DPRINTF(STRATEGY, ("udf_strategy called\n")); 481 482 /* check if we ought to be here */ 483 if (vp->v_type == VBLK || vp->v_type == VCHR) 484 panic("udf_strategy: spec"); 485 486 /* only filebuffers ought to be read/write by this, no descriptors */ 487 assert(bp->b_blkno >= 0); 488 489 /* get sector size */ 490 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 491 492 /* calculate length to fetch/store in sectors */ 493 sectors = bp->b_bcount / lb_size; 494 assert(bp->b_bcount > 0); 495 496 /* NEVER assume later that this buffer is already translated */ 497 /* bp->b_lblkno = bp->b_blkno; */ 498 499 /* check assertions: we OUGHT to always get multiples of this */ 500 assert(sectors * lb_size == bp->b_bcount); 501 __USE(sectors); 502 503 /* issue buffer */ 504 if (bp->b_flags & B_READ) { 505 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 506 ", for %d sectors\n", 507 vp, bp, bp->b_blkno, sectors)); 508 509 /* read buffer from the udf_node, translate vtop on the way*/ 510 udf_read_filebuf(udf_node, bp); 511 } else { 512 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 513 ", for %d sectors\n", 514 vp, bp, bp->b_blkno, sectors)); 515 516 /* write buffer to the udf_node, translate vtop on the way*/ 517 udf_write_filebuf(udf_node, bp); 518 } 519 520 return bp->b_error; 521 } 522 523 /* --------------------------------------------------------------------- */ 524 525 int 526 udf_readdir(void *v) 527 { 528 struct vop_readdir_args /* { 529 struct vnode *a_vp; 530 struct uio *a_uio; 531 kauth_cred_t a_cred; 532 int *a_eofflag; 533 off_t **a_cookies; 534 int *a_ncookies; 535 } */ *ap = v; 536 struct uio *uio = ap->a_uio; 537 struct vnode *vp = ap->a_vp; 538 struct udf_node *udf_node = VTOI(vp); 539 struct file_entry *fe; 540 struct extfile_entry *efe; 541 struct fileid_desc *fid; 542 struct dirent *dirent; 543 uint64_t file_size, diroffset, transoffset; 544 uint32_t lb_size; 545 int error; 546 547 DPRINTF(READDIR, ("udf_readdir called\n")); 548 549 /* This operation only makes sense on directory nodes. */ 550 if (vp->v_type != VDIR) 551 return ENOTDIR; 552 553 /* get directory filesize */ 554 if (udf_node->fe) { 555 fe = udf_node->fe; 556 file_size = udf_rw64(fe->inf_len); 557 } else { 558 assert(udf_node->efe); 559 efe = udf_node->efe; 560 file_size = udf_rw64(efe->inf_len); 561 } 562 563 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 564 565 /* 566 * Add `.' pseudo entry if at offset zero since its not in the fid 567 * stream 568 */ 569 if (uio->uio_offset == 0) { 570 DPRINTF(READDIR, ("\t'.' inserted\n")); 571 strcpy(dirent->d_name, "."); 572 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 573 dirent->d_type = DT_DIR; 574 dirent->d_namlen = strlen(dirent->d_name); 575 dirent->d_reclen = _DIRENT_SIZE(dirent); 576 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 577 578 /* mark with magic value that we have done the dummy */ 579 uio->uio_offset = UDF_DIRCOOKIE_DOT; 580 } 581 582 /* we are called just as long as we keep on pushing data in */ 583 error = 0; 584 if (uio->uio_offset < file_size) { 585 /* allocate temporary space for fid */ 586 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 587 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 588 589 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 590 uio->uio_offset = 0; 591 592 diroffset = uio->uio_offset; 593 transoffset = diroffset; 594 while (diroffset < file_size) { 595 DPRINTF(READDIR, ("\tread in fid stream\n")); 596 /* transfer a new fid/dirent */ 597 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 598 DPRINTFIF(READDIR, error, ("read error in read fid " 599 "stream : %d\n", error)); 600 if (error) 601 break; 602 603 /* 604 * If there isn't enough space in the uio to return a 605 * whole dirent, break off read 606 */ 607 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 608 break; 609 610 /* remember the last entry we transferred */ 611 transoffset = diroffset; 612 613 /* skip deleted entries */ 614 if (fid->file_char & UDF_FILE_CHAR_DEL) 615 continue; 616 617 /* skip not visible files */ 618 if (fid->file_char & UDF_FILE_CHAR_VIS) 619 continue; 620 621 /* copy dirent to the caller */ 622 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 623 dirent->d_name, dirent->d_type)); 624 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 625 } 626 627 /* pass on last transferred offset */ 628 uio->uio_offset = transoffset; 629 free(fid, M_UDFTEMP); 630 } 631 632 if (ap->a_eofflag) 633 *ap->a_eofflag = (uio->uio_offset >= file_size); 634 635 #ifdef DEBUG 636 if (udf_verbose & UDF_DEBUG_READDIR) { 637 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 638 if (ap->a_eofflag) 639 printf("returning EOF ? %d\n", *ap->a_eofflag); 640 if (error) 641 printf("readdir returning error %d\n", error); 642 } 643 #endif 644 645 free(dirent, M_UDFTEMP); 646 return error; 647 } 648 649 /* --------------------------------------------------------------------- */ 650 651 int 652 udf_lookup(void *v) 653 { 654 struct vop_lookup_v2_args /* { 655 struct vnode *a_dvp; 656 struct vnode **a_vpp; 657 struct componentname *a_cnp; 658 } */ *ap = v; 659 struct vnode *dvp = ap->a_dvp; 660 struct vnode **vpp = ap->a_vpp; 661 struct componentname *cnp = ap->a_cnp; 662 struct udf_node *dir_node, *res_node; 663 struct udf_mount *ump; 664 struct long_ad icb_loc; 665 mode_t mode; 666 uid_t d_uid; 667 gid_t d_gid; 668 const char *name; 669 int namelen, nameiop, islastcn, mounted_ro; 670 int error, found; 671 672 dir_node = VTOI(dvp); 673 ump = dir_node->ump; 674 *vpp = NULL; 675 676 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 677 cnp->cn_nameptr)); 678 679 /* simplify/clarification flags */ 680 nameiop = cnp->cn_nameiop; 681 islastcn = cnp->cn_flags & ISLASTCN; 682 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 683 684 /* check exec/dirread permissions first */ 685 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 686 if (error) 687 return error; 688 689 DPRINTF(LOOKUP, ("\taccess ok\n")); 690 691 /* 692 * If requesting a modify on the last path element on a read-only 693 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 694 */ 695 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 696 return EROFS; 697 698 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 699 cnp->cn_nameptr)); 700 /* look in the namecache */ 701 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 702 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 703 return *vpp == NULLVP ? ENOENT : 0; 704 } 705 706 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 707 708 /* 709 * Obviously, the file is not (anymore) in the namecache, we have to 710 * search for it. There are three basic cases: '.', '..' and others. 711 * 712 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 713 */ 714 error = 0; 715 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 716 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 717 /* special case 1 '.' */ 718 if (islastcn && cnp->cn_nameiop == RENAME) { 719 error = EISDIR; 720 goto out; 721 } 722 vref(dvp); 723 *vpp = dvp; 724 /* done */ 725 goto done; 726 } else if (cnp->cn_flags & ISDOTDOT) { 727 /* special case 2 '..' */ 728 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 729 730 if (islastcn && cnp->cn_nameiop == RENAME) { 731 error = EINVAL; 732 goto out; 733 } 734 735 /* get our node */ 736 name = ".."; 737 namelen = 2; 738 error = udf_lookup_name_in_dir(dvp, name, namelen, 739 &icb_loc, &found); 740 if (error) 741 goto out; 742 if (!found) 743 error = ENOENT; 744 745 /* first unlock parent */ 746 VOP_UNLOCK(dvp); 747 748 if (error == 0) { 749 DPRINTF(LOOKUP, ("\tfound '..'\n")); 750 /* try to create/reuse the node */ 751 error = udf_get_node(ump, &icb_loc, &res_node, 752 LK_EXCLUSIVE); 753 754 if (!error) { 755 DPRINTF(LOOKUP, 756 ("\tnode retrieved/created OK\n")); 757 *vpp = res_node->vnode; 758 } 759 } 760 761 /* try to relock parent */ 762 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 763 goto out; 764 } 765 766 /* all other files */ 767 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 768 769 /* lookup filename in the directory; location icb_loc */ 770 name = cnp->cn_nameptr; 771 namelen = cnp->cn_namelen; 772 error = udf_lookup_name_in_dir(dvp, name, namelen, 773 &icb_loc, &found); 774 if (error) 775 goto out; 776 if (!found) { 777 DPRINTF(LOOKUP, ("\tNOT found\n")); 778 /* 779 * The entry was not found in the directory. This is 780 * valid if we are creating or renaming an entry and 781 * are working on the last component of the path name. 782 */ 783 if (islastcn && (cnp->cn_nameiop == CREATE || 784 cnp->cn_nameiop == RENAME)) { 785 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 786 if (error) { 787 goto out; 788 } 789 error = EJUSTRETURN; 790 } else { 791 error = ENOENT; 792 } 793 /* done */ 794 goto done; 795 } 796 797 /* 798 * XXX NOTE tmpfs has a test here that tests that intermediate 799 * components i.e. not the last one ought to be either a directory or 800 * a link. It seems to function well without this code. 801 */ 802 803 /* try to create/reuse the node */ 804 error = udf_get_node(ump, &icb_loc, &res_node, LK_EXCLUSIVE); 805 if (error) 806 goto out; 807 808 /* check permissions */ 809 if (islastcn && (cnp->cn_nameiop == DELETE || 810 cnp->cn_nameiop == RENAME) ) { 811 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 812 if (error) { 813 vput(res_node->vnode); 814 goto out; 815 } 816 817 /* 818 * Check if the directory has its sticky bit set. If so, ask 819 * for clearance since only the owner of a file or directory 820 * can remove/rename from that directory. 821 */ 822 mode = udf_getaccessmode(dir_node); 823 if ((mode & S_ISTXT) != 0) { 824 udf_getownership(dir_node, &d_uid, &d_gid); 825 error = kauth_authorize_vnode(cnp->cn_cred, 826 KAUTH_VNODE_DELETE, res_node->vnode, 827 dir_node->vnode, genfs_can_sticky(dvp, cnp->cn_cred, 828 d_uid, d_uid)); 829 if (error) { 830 error = EPERM; 831 vput(res_node->vnode); 832 goto out; 833 } 834 } 835 } 836 837 *vpp = res_node->vnode; 838 839 done: 840 /* 841 * Store result in the cache if requested. If we are creating a file, 842 * the file might not be found and thus putting it into the namecache 843 * might be seen as negative caching. 844 */ 845 if (nameiop != CREATE) 846 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 847 cnp->cn_flags); 848 849 out: 850 if (error == 0 && *vpp != dvp) 851 VOP_UNLOCK(*vpp); 852 DPRINTFIF(LOOKUP, error, ("udf_lookup returning error %d\n", error)); 853 854 return error; 855 } 856 857 /* --------------------------------------------------------------------- */ 858 859 int 860 udf_getattr(void *v) 861 { 862 struct vop_getattr_args /* { 863 struct vnode *a_vp; 864 struct vattr *a_vap; 865 kauth_cred_t a_cred; 866 struct lwp *a_l; 867 } */ *ap = v; 868 struct vnode *vp = ap->a_vp; 869 struct udf_node *udf_node = VTOI(vp); 870 struct udf_mount *ump = udf_node->ump; 871 struct file_entry *fe = udf_node->fe; 872 struct extfile_entry *efe = udf_node->efe; 873 struct filetimes_extattr_entry *ft_extattr; 874 struct device_extattr_entry *devattr; 875 struct vattr *vap = ap->a_vap; 876 struct timestamp *atime, *mtime, *attrtime, *creatime; 877 uint64_t filesize, blkssize; 878 uint32_t nlink; 879 uint32_t offset, a_l; 880 uint8_t *filedata, *targetbuf; 881 uid_t uid; 882 gid_t gid; 883 int length, error; 884 885 DPRINTF(CALL, ("udf_getattr called\n")); 886 887 /* update times before we returning values */ 888 udf_itimes(udf_node, NULL, NULL, NULL); 889 890 /* get descriptor information */ 891 if (fe) { 892 nlink = udf_rw16(fe->link_cnt); 893 uid = (uid_t)udf_rw32(fe->uid); 894 gid = (gid_t)udf_rw32(fe->gid); 895 filesize = udf_rw64(fe->inf_len); 896 blkssize = udf_rw64(fe->logblks_rec); 897 atime = &fe->atime; 898 mtime = &fe->mtime; 899 attrtime = &fe->attrtime; 900 filedata = fe->data; 901 902 /* initial guess */ 903 creatime = mtime; 904 905 /* check our extended attribute if present */ 906 error = udf_extattr_search_intern(udf_node, 907 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 908 if (!error) { 909 ft_extattr = (struct filetimes_extattr_entry *) 910 (filedata + offset); 911 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 912 creatime = &ft_extattr->times[0]; 913 } 914 } else { 915 assert(udf_node->efe); 916 nlink = udf_rw16(efe->link_cnt); 917 uid = (uid_t)udf_rw32(efe->uid); 918 gid = (gid_t)udf_rw32(efe->gid); 919 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 920 blkssize = udf_rw64(efe->logblks_rec); 921 atime = &efe->atime; 922 mtime = &efe->mtime; 923 attrtime = &efe->attrtime; 924 creatime = &efe->ctime; 925 filedata = efe->data; 926 } 927 928 /* do the uid/gid translation game */ 929 if (uid == (uid_t) -1) 930 uid = ump->mount_args.anon_uid; 931 if (gid == (gid_t) -1) 932 gid = ump->mount_args.anon_gid; 933 934 /* fill in struct vattr with values from the node */ 935 vattr_null(vap); 936 vap->va_type = vp->v_type; 937 vap->va_mode = udf_getaccessmode(udf_node); 938 vap->va_nlink = nlink; 939 vap->va_uid = uid; 940 vap->va_gid = gid; 941 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 942 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 943 vap->va_size = filesize; 944 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 945 946 /* 947 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 948 * 1 to the link count if its a directory we're requested attributes 949 * of. 950 */ 951 if (vap->va_type == VDIR) 952 vap->va_nlink++; 953 954 /* 955 * BUG-ALERT: Posix requires the va_size to be pathlength for symbolic 956 * links. 957 */ 958 if (vap->va_type == VLNK) { 959 /* claim temporary buffers for translation */ 960 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 961 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 962 if (!error) { 963 vap->va_size = length; 964 KASSERT(length == strlen(targetbuf)); 965 } 966 free(targetbuf, M_UDFTEMP); 967 /* XXX return error? */ 968 } 969 970 /* access times */ 971 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 972 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 973 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 974 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 975 976 vap->va_gen = 1; /* no multiple generations yes (!?) */ 977 vap->va_flags = 0; /* no flags */ 978 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 979 vap->va_filerev = 1; /* TODO file revision numbers? */ 980 vap->va_vaflags = 0; 981 /* TODO get vaflags from the extended attributes? */ 982 983 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 984 error = udf_extattr_search_intern(udf_node, 985 UDF_DEVICESPEC_ATTR_NO, "", 986 &offset, &a_l); 987 /* if error, deny access */ 988 if (error || (filedata == NULL)) { 989 vap->va_mode = 0; /* or v_type = VNON? */ 990 } else { 991 devattr = (struct device_extattr_entry *) 992 filedata + offset; 993 vap->va_rdev = makedev( 994 udf_rw32(devattr->major), 995 udf_rw32(devattr->minor) 996 ); 997 /* TODO we could check the implementator */ 998 } 999 } 1000 1001 return 0; 1002 } 1003 1004 /* --------------------------------------------------------------------- */ 1005 1006 static int 1007 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 1008 kauth_cred_t cred) 1009 { 1010 struct udf_node *udf_node = VTOI(vp); 1011 uid_t uid; 1012 gid_t gid; 1013 int error; 1014 1015 #ifdef notyet 1016 /* TODO get vaflags from the extended attributes? */ 1017 /* Immutable or append-only files cannot be modified, either. */ 1018 if (udf_node->flags & (IMMUTABLE | APPEND)) 1019 return EPERM; 1020 #endif 1021 1022 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1023 return EROFS; 1024 1025 /* retrieve old values */ 1026 udf_getownership(udf_node, &uid, &gid); 1027 1028 /* only one could be specified */ 1029 if (new_uid == VNOVAL) 1030 new_uid = uid; 1031 if (new_gid == VNOVAL) 1032 new_gid = gid; 1033 1034 /* check if we can fit it in an 32 bits */ 1035 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1036 return EINVAL; 1037 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1038 return EINVAL; 1039 1040 /* check permissions */ 1041 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1042 vp, NULL, genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid)); 1043 if (error) 1044 return (error); 1045 1046 /* change the ownership */ 1047 udf_setownership(udf_node, new_uid, new_gid); 1048 1049 /* mark node changed */ 1050 udf_node->i_flags |= IN_CHANGE; 1051 1052 return 0; 1053 } 1054 1055 1056 static int 1057 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1058 { 1059 struct udf_node *udf_node = VTOI(vp); 1060 uid_t uid; 1061 gid_t gid; 1062 int error; 1063 1064 #ifdef notyet 1065 /* TODO get vaflags from the extended attributes? */ 1066 /* Immutable or append-only files cannot be modified, either. */ 1067 if (udf_node->flags & (IMMUTABLE | APPEND)) 1068 return EPERM; 1069 #endif 1070 1071 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1072 return EROFS; 1073 1074 /* retrieve uid/gid values */ 1075 udf_getownership(udf_node, &uid, &gid); 1076 1077 /* check permissions */ 1078 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1079 NULL, genfs_can_chmod(vp, cred, uid, gid, mode)); 1080 if (error) 1081 return (error); 1082 1083 /* change mode */ 1084 udf_setaccessmode(udf_node, mode); 1085 1086 /* mark node changed */ 1087 udf_node->i_flags |= IN_CHANGE; 1088 1089 return 0; 1090 } 1091 1092 1093 /* exported */ 1094 int 1095 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1096 { 1097 struct udf_node *udf_node = VTOI(vp); 1098 int error, extended; 1099 1100 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1101 return EROFS; 1102 1103 /* Decide whether this is a valid operation based on the file type. */ 1104 switch (vp->v_type) { 1105 case VDIR: 1106 return EISDIR; 1107 case VREG: 1108 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1109 return EROFS; 1110 break; 1111 case VBLK: 1112 /* FALLTHROUGH */ 1113 case VCHR: 1114 /* FALLTHROUGH */ 1115 case VFIFO: 1116 /* Allow modifications of special files even if in the file 1117 * system is mounted read-only (we are not modifying the 1118 * files themselves, but the objects they represent). */ 1119 return 0; 1120 default: 1121 /* Anything else is unsupported. */ 1122 return EOPNOTSUPP; 1123 } 1124 1125 #if notyet 1126 /* TODO get vaflags from the extended attributes? */ 1127 /* Immutable or append-only files cannot be modified, either. */ 1128 if (node->flags & (IMMUTABLE | APPEND)) 1129 return EPERM; 1130 #endif 1131 1132 /* resize file to the requested size */ 1133 error = udf_resize_node(udf_node, newsize, &extended); 1134 1135 if (error == 0) { 1136 /* mark change */ 1137 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1138 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1139 udf_node->i_flags |= IN_ACCESS; 1140 udf_update(vp, NULL, NULL, NULL, 0); 1141 } 1142 1143 return error; 1144 } 1145 1146 1147 static int 1148 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1149 { 1150 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1151 return EROFS; 1152 1153 /* 1154 * XXX we can't do this yet, as its not described in the standard yet 1155 */ 1156 1157 return EOPNOTSUPP; 1158 } 1159 1160 1161 static int 1162 udf_chtimes(struct vnode *vp, 1163 struct timespec *atime, struct timespec *mtime, 1164 struct timespec *birthtime, int setattrflags, 1165 kauth_cred_t cred) 1166 { 1167 struct udf_node *udf_node = VTOI(vp); 1168 uid_t uid; 1169 gid_t gid; 1170 int error; 1171 1172 #ifdef notyet 1173 /* TODO get vaflags from the extended attributes? */ 1174 /* Immutable or append-only files cannot be modified, either. */ 1175 if (udf_node->flags & (IMMUTABLE | APPEND)) 1176 return EPERM; 1177 #endif 1178 1179 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1180 return EROFS; 1181 1182 /* retrieve uid/gid values */ 1183 udf_getownership(udf_node, &uid, &gid); 1184 1185 /* check permissions */ 1186 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1187 NULL, genfs_can_chtimes(vp, cred, uid, setattrflags)); 1188 if (error) 1189 return (error); 1190 1191 /* update node flags depending on what times are passed */ 1192 if (atime->tv_sec != VNOVAL) 1193 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1194 udf_node->i_flags |= IN_ACCESS; 1195 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1196 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1197 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1198 udf_node->i_flags |= IN_ACCESS; 1199 } 1200 1201 return udf_update(vp, atime, mtime, birthtime, 0); 1202 } 1203 1204 1205 int 1206 udf_setattr(void *v) 1207 { 1208 struct vop_setattr_args /* { 1209 struct vnode *a_vp; 1210 struct vattr *a_vap; 1211 kauth_cred_t a_cred; 1212 struct lwp *a_l; 1213 } */ *ap = v; 1214 struct vnode *vp = ap->a_vp; 1215 /* struct udf_node *udf_node = VTOI(vp); */ 1216 /* struct udf_mount *ump = udf_node->ump; */ 1217 kauth_cred_t cred = ap->a_cred; 1218 struct vattr *vap = ap->a_vap; 1219 int error; 1220 1221 DPRINTF(CALL, ("udf_setattr called\n")); 1222 1223 /* Abort if any unsettable attribute is given. */ 1224 error = 0; 1225 if (vap->va_type != VNON || 1226 vap->va_nlink != VNOVAL || 1227 vap->va_fsid != VNOVAL || 1228 vap->va_fileid != VNOVAL || 1229 vap->va_blocksize != VNOVAL || 1230 #ifdef notyet 1231 /* checks are debated */ 1232 vap->va_ctime.tv_sec != VNOVAL || 1233 vap->va_ctime.tv_nsec != VNOVAL || 1234 vap->va_birthtime.tv_sec != VNOVAL || 1235 vap->va_birthtime.tv_nsec != VNOVAL || 1236 #endif 1237 vap->va_gen != VNOVAL || 1238 vap->va_rdev != VNOVAL || 1239 vap->va_bytes != VNOVAL) 1240 error = EINVAL; 1241 1242 DPRINTF(ATTR, ("setattr changing:\n")); 1243 if (error == 0 && (vap->va_flags != VNOVAL)) { 1244 DPRINTF(ATTR, ("\tchflags\n")); 1245 error = udf_chflags(vp, vap->va_flags, cred); 1246 } 1247 1248 if (error == 0 && (vap->va_size != VNOVAL)) { 1249 DPRINTF(ATTR, ("\tchsize\n")); 1250 error = udf_chsize(vp, vap->va_size, cred); 1251 } 1252 1253 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1254 DPRINTF(ATTR, ("\tchown\n")); 1255 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1256 } 1257 1258 if (error == 0 && (vap->va_mode != VNOVAL)) { 1259 DPRINTF(ATTR, ("\tchmod\n")); 1260 error = udf_chmod(vp, vap->va_mode, cred); 1261 } 1262 1263 if (error == 0 && 1264 ((vap->va_atime.tv_sec != VNOVAL && 1265 vap->va_atime.tv_nsec != VNOVAL) || 1266 (vap->va_mtime.tv_sec != VNOVAL && 1267 vap->va_mtime.tv_nsec != VNOVAL)) 1268 ) { 1269 DPRINTF(ATTR, ("\tchtimes\n")); 1270 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1271 &vap->va_birthtime, vap->va_vaflags, cred); 1272 } 1273 1274 return error; 1275 } 1276 1277 /* --------------------------------------------------------------------- */ 1278 1279 /* 1280 * Return POSIX pathconf information for UDF file systems. 1281 */ 1282 int 1283 udf_pathconf(void *v) 1284 { 1285 struct vop_pathconf_args /* { 1286 struct vnode *a_vp; 1287 int a_name; 1288 register_t *a_retval; 1289 } */ *ap = v; 1290 uint32_t bits; 1291 1292 DPRINTF(CALL, ("udf_pathconf called\n")); 1293 1294 switch (ap->a_name) { 1295 case _PC_LINK_MAX: 1296 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1297 return 0; 1298 case _PC_NAME_MAX: 1299 *ap->a_retval = UDF_MAXNAMLEN; 1300 return 0; 1301 case _PC_PATH_MAX: 1302 *ap->a_retval = PATH_MAX; 1303 return 0; 1304 case _PC_PIPE_BUF: 1305 *ap->a_retval = PIPE_BUF; 1306 return 0; 1307 case _PC_CHOWN_RESTRICTED: 1308 *ap->a_retval = 1; 1309 return 0; 1310 case _PC_NO_TRUNC: 1311 *ap->a_retval = 1; 1312 return 0; 1313 case _PC_SYNC_IO: 1314 *ap->a_retval = 0; /* synchronised is off for performance */ 1315 return 0; 1316 case _PC_FILESIZEBITS: 1317 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1318 bits = 64; /* XXX ought to deliver 65 */ 1319 #if 0 1320 if (udf_node) 1321 bits = 64 * vp->v_mount->mnt_dev_bshift; 1322 #endif 1323 *ap->a_retval = bits; 1324 return 0; 1325 default: 1326 return genfs_pathconf(ap); 1327 } 1328 } 1329 1330 1331 /* --------------------------------------------------------------------- */ 1332 1333 int 1334 udf_open(void *v) 1335 { 1336 struct vop_open_args /* { 1337 struct vnode *a_vp; 1338 int a_mode; 1339 kauth_cred_t a_cred; 1340 struct proc *a_p; 1341 } */ *ap = v; 1342 int flags; 1343 1344 DPRINTF(CALL, ("udf_open called\n")); 1345 1346 /* 1347 * Files marked append-only must be opened for appending. 1348 * TODO: get chflags(2) flags from extended attribute. 1349 */ 1350 flags = 0; 1351 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1352 return (EPERM); 1353 1354 return 0; 1355 } 1356 1357 1358 /* --------------------------------------------------------------------- */ 1359 1360 int 1361 udf_close(void *v) 1362 { 1363 struct vop_close_args /* { 1364 struct vnode *a_vp; 1365 int a_fflag; 1366 kauth_cred_t a_cred; 1367 struct proc *a_p; 1368 } */ *ap = v; 1369 struct vnode *vp = ap->a_vp; 1370 struct udf_node *udf_node = VTOI(vp); 1371 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1372 int error; 1373 1374 DPRINTF(CALL, ("udf_close called\n")); 1375 udf_node = udf_node; /* shut up gcc */ 1376 1377 if (!async && (vp->v_type != VDIR)) { 1378 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 1379 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1380 if (error) 1381 return error; 1382 } 1383 1384 mutex_enter(vp->v_interlock); 1385 if (vrefcnt(vp) > 1) 1386 udf_itimes(udf_node, NULL, NULL, NULL); 1387 mutex_exit(vp->v_interlock); 1388 1389 return 0; 1390 } 1391 1392 1393 /* --------------------------------------------------------------------- */ 1394 1395 static int 1396 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1397 { 1398 int flags; 1399 1400 /* check if we are allowed to write */ 1401 switch (vap->va_type) { 1402 case VDIR: 1403 case VLNK: 1404 case VREG: 1405 /* 1406 * normal nodes: check if we're on a read-only mounted 1407 * filingsystem and bomb out if we're trying to write. 1408 */ 1409 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1410 return EROFS; 1411 break; 1412 case VBLK: 1413 case VCHR: 1414 case VSOCK: 1415 case VFIFO: 1416 /* 1417 * special nodes: even on read-only mounted filingsystems 1418 * these are allowed to be written to if permissions allow. 1419 */ 1420 break; 1421 default: 1422 /* no idea what this is */ 1423 return EINVAL; 1424 } 1425 1426 /* noone may write immutable files */ 1427 /* TODO: get chflags(2) flags from extended attribute. */ 1428 flags = 0; 1429 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1430 return EPERM; 1431 1432 return 0; 1433 } 1434 1435 static int 1436 udf_check_permitted(struct vnode *vp, struct vattr *vap, accmode_t accmode, 1437 kauth_cred_t cred) 1438 { 1439 /* ask the generic genfs_can_access to advice on security */ 1440 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 1441 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp, cred, 1442 vap->va_uid, vap->va_gid, vap->va_mode, NULL, accmode)); 1443 } 1444 1445 int 1446 udf_access(void *v) 1447 { 1448 struct vop_access_args /* { 1449 struct vnode *a_vp; 1450 accmode_t a_accmode; 1451 kauth_cred_t a_cred; 1452 struct proc *a_p; 1453 } */ *ap = v; 1454 struct vnode *vp = ap->a_vp; 1455 accmode_t accmode = ap->a_accmode; 1456 kauth_cred_t cred = ap->a_cred; 1457 /* struct udf_node *udf_node = VTOI(vp); */ 1458 struct vattr vap; 1459 int error; 1460 1461 DPRINTF(CALL, ("udf_access called\n")); 1462 1463 error = VOP_GETATTR(vp, &vap, NULL); 1464 if (error) 1465 return error; 1466 1467 error = udf_check_possible(vp, &vap, accmode); 1468 if (error) 1469 return error; 1470 1471 error = udf_check_permitted(vp, &vap, accmode, cred); 1472 1473 return error; 1474 } 1475 1476 /* --------------------------------------------------------------------- */ 1477 1478 int 1479 udf_create(void *v) 1480 { 1481 struct vop_create_v3_args /* { 1482 struct vnode *a_dvp; 1483 struct vnode **a_vpp; 1484 struct componentname *a_cnp; 1485 struct vattr *a_vap; 1486 } */ *ap = v; 1487 struct vnode *dvp = ap->a_dvp; 1488 struct vnode **vpp = ap->a_vpp; 1489 struct vattr *vap = ap->a_vap; 1490 struct componentname *cnp = ap->a_cnp; 1491 int error; 1492 1493 DPRINTF(CALL, ("udf_create called\n")); 1494 error = udf_create_node(dvp, vpp, vap, cnp); 1495 1496 return error; 1497 } 1498 1499 /* --------------------------------------------------------------------- */ 1500 1501 int 1502 udf_mknod(void *v) 1503 { 1504 struct vop_mknod_v3_args /* { 1505 struct vnode *a_dvp; 1506 struct vnode **a_vpp; 1507 struct componentname *a_cnp; 1508 struct vattr *a_vap; 1509 } */ *ap = v; 1510 struct vnode *dvp = ap->a_dvp; 1511 struct vnode **vpp = ap->a_vpp; 1512 struct vattr *vap = ap->a_vap; 1513 struct componentname *cnp = ap->a_cnp; 1514 int error; 1515 1516 DPRINTF(CALL, ("udf_mknod called\n")); 1517 error = udf_create_node(dvp, vpp, vap, cnp); 1518 1519 return error; 1520 } 1521 1522 /* --------------------------------------------------------------------- */ 1523 1524 int 1525 udf_mkdir(void *v) 1526 { 1527 struct vop_mkdir_v3_args /* { 1528 struct vnode *a_dvp; 1529 struct vnode **a_vpp; 1530 struct componentname *a_cnp; 1531 struct vattr *a_vap; 1532 } */ *ap = v; 1533 struct vnode *dvp = ap->a_dvp; 1534 struct vnode **vpp = ap->a_vpp; 1535 struct vattr *vap = ap->a_vap; 1536 struct componentname *cnp = ap->a_cnp; 1537 int error; 1538 1539 DPRINTF(CALL, ("udf_mkdir called\n")); 1540 error = udf_create_node(dvp, vpp, vap, cnp); 1541 1542 return error; 1543 } 1544 1545 /* --------------------------------------------------------------------- */ 1546 1547 int 1548 udf_link(void *v) 1549 { 1550 struct vop_link_v2_args /* { 1551 struct vnode *a_dvp; 1552 struct vnode *a_vp; 1553 struct componentname *a_cnp; 1554 } */ *ap = v; 1555 struct vnode *dvp = ap->a_dvp; 1556 struct vnode *vp = ap->a_vp; 1557 struct componentname *cnp = ap->a_cnp; 1558 struct udf_node *udf_node, *dir_node; 1559 struct vattr vap; 1560 int error, abrt = 1; 1561 1562 DPRINTF(CALL, ("udf_link called\n")); 1563 KASSERT(dvp != vp); 1564 KASSERT(vp->v_type != VDIR); 1565 KASSERT(dvp->v_mount == vp->v_mount); 1566 1567 /* get attributes */ 1568 dir_node = VTOI(dvp); 1569 udf_node = VTOI(vp); 1570 1571 if ((error = vn_lock(vp, LK_EXCLUSIVE))) { 1572 DPRINTF(LOCKING, ("exclusive lock failed for vnode %p\n", vp)); 1573 goto out; 1574 } 1575 1576 error = VOP_GETATTR(vp, &vap, FSCRED); 1577 if (error) 1578 goto out1; 1579 1580 /* check link count overflow */ 1581 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1582 error = EMLINK; 1583 goto out1; 1584 } 1585 error = kauth_authorize_vnode(cnp->cn_cred, KAUTH_VNODE_ADD_LINK, vp, 1586 dvp, 0); 1587 if (error) 1588 goto out1; 1589 abrt = 0; 1590 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1591 out1: 1592 VOP_UNLOCK(vp); 1593 out: 1594 if (abrt) 1595 VOP_ABORTOP(dvp, cnp); 1596 return error; 1597 } 1598 1599 /* --------------------------------------------------------------------- */ 1600 1601 static int 1602 udf_do_symlink(struct udf_node *udf_node, char *target) 1603 { 1604 struct pathcomp pathcomp; 1605 uint8_t *pathbuf, *pathpos, *compnamepos; 1606 char *mntonname; 1607 int pathlen, len, compnamelen, mntonnamelen; 1608 int error; 1609 1610 /* process `target' to an UDF structure */ 1611 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1612 pathpos = pathbuf; 1613 pathlen = 0; 1614 1615 if (*target == '/') { 1616 /* symlink starts from the root */ 1617 len = UDF_PATH_COMP_SIZE; 1618 memset(&pathcomp, 0, len); 1619 pathcomp.type = UDF_PATH_COMP_ROOT; 1620 1621 /* check if its mount-point relative! */ 1622 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1623 mntonnamelen = strlen(mntonname); 1624 if (strlen(target) >= mntonnamelen) { 1625 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1626 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1627 target += mntonnamelen; 1628 } 1629 } else { 1630 target++; 1631 } 1632 1633 memcpy(pathpos, &pathcomp, len); 1634 pathpos += len; 1635 pathlen += len; 1636 } 1637 1638 error = 0; 1639 while (*target) { 1640 /* ignore multiple '/' */ 1641 while (*target == '/') { 1642 target++; 1643 } 1644 if (!*target) 1645 break; 1646 1647 /* extract component name */ 1648 compnamelen = 0; 1649 compnamepos = target; 1650 while ((*target) && (*target != '/')) { 1651 target++; 1652 compnamelen++; 1653 } 1654 1655 /* just trunc if too long ?? (security issue) */ 1656 if (compnamelen >= 127) { 1657 error = ENAMETOOLONG; 1658 break; 1659 } 1660 1661 /* convert unix name to UDF name */ 1662 len = sizeof(struct pathcomp); 1663 memset(&pathcomp, 0, len); 1664 pathcomp.type = UDF_PATH_COMP_NAME; 1665 len = UDF_PATH_COMP_SIZE; 1666 1667 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1668 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1669 if ((compnamelen == 1) && (*compnamepos == '.')) 1670 pathcomp.type = UDF_PATH_COMP_CURDIR; 1671 1672 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1673 unix_to_udf_name( 1674 (char *) &pathcomp.ident, &pathcomp.l_ci, 1675 compnamepos, compnamelen, 1676 &udf_node->ump->logical_vol->desc_charset); 1677 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1678 } 1679 1680 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1681 error = ENAMETOOLONG; 1682 break; 1683 } 1684 1685 memcpy(pathpos, &pathcomp, len); 1686 pathpos += len; 1687 pathlen += len; 1688 } 1689 1690 if (error) { 1691 /* apparently too big */ 1692 free(pathbuf, M_UDFTEMP); 1693 return error; 1694 } 1695 1696 error = udf_grow_node(udf_node, pathlen); 1697 if (error) { 1698 /* failed to pregrow node */ 1699 free(pathbuf, M_UDFTEMP); 1700 return error; 1701 } 1702 1703 /* write out structure on the new file */ 1704 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1705 pathbuf, pathlen, 0, 1706 UIO_SYSSPACE, IO_ALTSEMANTICS, 1707 FSCRED, NULL, NULL); 1708 1709 /* return status of symlink contents writeout */ 1710 free(pathbuf, M_UDFTEMP); 1711 return error; 1712 } 1713 1714 1715 int 1716 udf_symlink(void *v) 1717 { 1718 struct vop_symlink_v3_args /* { 1719 struct vnode *a_dvp; 1720 struct vnode **a_vpp; 1721 struct componentname *a_cnp; 1722 struct vattr *a_vap; 1723 char *a_target; 1724 } */ *ap = v; 1725 struct vnode *dvp = ap->a_dvp; 1726 struct vnode **vpp = ap->a_vpp; 1727 struct vattr *vap = ap->a_vap; 1728 struct componentname *cnp = ap->a_cnp; 1729 struct udf_node *dir_node; 1730 struct udf_node *udf_node; 1731 int error; 1732 1733 DPRINTF(CALL, ("udf_symlink called\n")); 1734 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1735 error = udf_create_node(dvp, vpp, vap, cnp); 1736 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1737 if (!error) { 1738 dir_node = VTOI(dvp); 1739 udf_node = VTOI(*vpp); 1740 KASSERT(udf_node); 1741 error = udf_do_symlink(udf_node, ap->a_target); 1742 if (error) { 1743 /* remove node */ 1744 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1745 vrele(*vpp); 1746 *vpp = NULL; 1747 } 1748 } 1749 return error; 1750 } 1751 1752 /* --------------------------------------------------------------------- */ 1753 1754 static int 1755 udf_do_readlink(struct udf_node *udf_node, uint64_t filesize, 1756 uint8_t *targetbuf, int *length) 1757 { 1758 struct pathcomp pathcomp; 1759 uint8_t *pathbuf, *tmpname; 1760 uint8_t *pathpos, *targetpos; 1761 char *mntonname; 1762 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1763 int first, error; 1764 1765 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1766 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1767 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1768 memset(targetbuf, 0, PATH_MAX); 1769 1770 /* read contents of file in our temporary buffer */ 1771 error = vn_rdwr(UIO_READ, udf_node->vnode, 1772 pathbuf, filesize, 0, 1773 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1774 FSCRED, NULL, NULL); 1775 if (error) { 1776 /* failed to read in symlink contents */ 1777 free(pathbuf, M_UDFTEMP); 1778 free(tmpname, M_UDFTEMP); 1779 return error; 1780 } 1781 1782 /* convert to a unix path */ 1783 pathpos = pathbuf; 1784 pathlen = 0; 1785 targetpos = targetbuf; 1786 targetlen = PATH_MAX; 1787 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1788 mntonnamelen = strlen(mntonname); 1789 1790 error = 0; 1791 first = 1; 1792 while (filesize - pathlen >= UDF_PATH_COMP_SIZE) { 1793 len = UDF_PATH_COMP_SIZE; 1794 memcpy(&pathcomp, pathpos, len); 1795 l_ci = pathcomp.l_ci; 1796 switch (pathcomp.type) { 1797 case UDF_PATH_COMP_ROOT : 1798 /* XXX should check for l_ci; bugcompatible now */ 1799 if ((targetlen < 1) || !first) { 1800 error = EINVAL; 1801 break; 1802 } 1803 *targetpos++ = '/'; targetlen--; 1804 break; 1805 case UDF_PATH_COMP_MOUNTROOT : 1806 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1807 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1808 error = EINVAL; 1809 break; 1810 } 1811 memcpy(targetpos, mntonname, mntonnamelen); 1812 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1813 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1814 /* more follows, so must be directory */ 1815 *targetpos++ = '/'; targetlen--; 1816 } 1817 break; 1818 case UDF_PATH_COMP_PARENTDIR : 1819 /* XXX should check for l_ci; bugcompatible now */ 1820 if (targetlen < 3) { 1821 error = EINVAL; 1822 break; 1823 } 1824 *targetpos++ = '.'; targetlen--; 1825 *targetpos++ = '.'; targetlen--; 1826 *targetpos++ = '/'; targetlen--; 1827 break; 1828 case UDF_PATH_COMP_CURDIR : 1829 /* XXX should check for l_ci; bugcompatible now */ 1830 if (targetlen < 2) { 1831 error = EINVAL; 1832 break; 1833 } 1834 *targetpos++ = '.'; targetlen--; 1835 *targetpos++ = '/'; targetlen--; 1836 break; 1837 case UDF_PATH_COMP_NAME : 1838 if (l_ci == 0) { 1839 error = EINVAL; 1840 break; 1841 } 1842 memset(tmpname, 0, PATH_MAX); 1843 memcpy(&pathcomp, pathpos, len + l_ci); 1844 udf_to_unix_name(tmpname, MAXPATHLEN, 1845 pathcomp.ident, l_ci, 1846 &udf_node->ump->logical_vol->desc_charset); 1847 namelen = strlen(tmpname); 1848 if (targetlen < namelen + 1) { 1849 error = EINVAL; 1850 break; 1851 } 1852 memcpy(targetpos, tmpname, namelen); 1853 targetpos += namelen; targetlen -= namelen; 1854 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1855 /* more follows, so must be directory */ 1856 *targetpos++ = '/'; targetlen--; 1857 } 1858 break; 1859 default : 1860 error = EINVAL; 1861 break; 1862 } 1863 first = 0; 1864 if (error) 1865 break; 1866 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1867 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1868 1869 } 1870 /* all processed? */ 1871 if (filesize - pathlen > 0) 1872 error = EINVAL; 1873 1874 free(pathbuf, M_UDFTEMP); 1875 free(tmpname, M_UDFTEMP); 1876 1877 *length = PATH_MAX - targetlen; 1878 return error; 1879 } 1880 1881 1882 int 1883 udf_readlink(void *v) 1884 { 1885 struct vop_readlink_args /* { 1886 struct vnode *a_vp; 1887 struct uio *a_uio; 1888 kauth_cred_t a_cred; 1889 } */ *ap = v; 1890 struct vnode *vp = ap->a_vp; 1891 struct udf_node *udf_node = VTOI(vp); 1892 struct file_entry *fe = udf_node->fe; 1893 struct extfile_entry *efe = udf_node->efe; 1894 struct uio *uio = ap->a_uio; 1895 uint64_t filesize; 1896 uint8_t *targetbuf; 1897 int length; 1898 int error; 1899 1900 DPRINTF(CALL, ("udf_readlink called\n")); 1901 1902 if (fe) { 1903 filesize = udf_rw64(fe->inf_len); 1904 } else { 1905 assert(udf_node->efe); 1906 filesize = udf_rw64(efe->inf_len); 1907 } 1908 1909 /* claim temporary buffers for translation */ 1910 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1911 1912 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 1913 1914 /* uiomove() to destination */ 1915 if (!error) 1916 uiomove(targetbuf, length, uio); 1917 1918 free(targetbuf, M_UDFTEMP); 1919 return error; 1920 } 1921 1922 /* --------------------------------------------------------------------- */ 1923 1924 /* 1925 * udf_rename() moved to udf_rename.c 1926 */ 1927 1928 /* --------------------------------------------------------------------- */ 1929 1930 int 1931 udf_remove(void *v) 1932 { 1933 struct vop_remove_v3_args /* { 1934 struct vnode *a_dvp; 1935 struct vnode *a_vp; 1936 struct componentname *a_cnp; 1937 nlink_t ctx_vp_new_nlink; 1938 } */ *ap = v; 1939 struct vnode *dvp = ap->a_dvp; 1940 struct vnode *vp = ap->a_vp; 1941 struct componentname *cnp = ap->a_cnp; 1942 struct udf_node *dir_node = VTOI(dvp); 1943 struct udf_node *udf_node = VTOI(vp); 1944 struct udf_mount *ump = dir_node->ump; 1945 int error; 1946 1947 DPRINTF(CALL, ("udf_remove called\n")); 1948 if (vp->v_type != VDIR) { 1949 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1950 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1951 if (error == 0) { 1952 if (udf_node->fe) { 1953 ap->ctx_vp_new_nlink = 1954 udf_rw16(udf_node->fe->link_cnt); 1955 } else { 1956 KASSERT(udf_node->efe != NULL); 1957 ap->ctx_vp_new_nlink = 1958 udf_rw16(udf_node->efe->link_cnt); 1959 } 1960 } 1961 } else { 1962 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1963 error = EPERM; 1964 } 1965 1966 if (dvp == vp) 1967 vrele(vp); 1968 else 1969 vput(vp); 1970 1971 return error; 1972 } 1973 1974 /* --------------------------------------------------------------------- */ 1975 1976 int 1977 udf_rmdir(void *v) 1978 { 1979 struct vop_rmdir_v2_args /* { 1980 struct vnode *a_dvp; 1981 struct vnode *a_vp; 1982 struct componentname *a_cnp; 1983 } */ *ap = v; 1984 struct vnode *vp = ap->a_vp; 1985 struct vnode *dvp = ap->a_dvp; 1986 struct componentname *cnp = ap->a_cnp; 1987 struct udf_node *dir_node = VTOI(dvp); 1988 struct udf_node *udf_node = VTOI(vp); 1989 struct udf_mount *ump = dir_node->ump; 1990 int error, isempty; 1991 1992 DPRINTF(CALL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1993 1994 /* don't allow '.' to be deleted */ 1995 if (dir_node == udf_node) { 1996 vrele(vp); 1997 return EINVAL; 1998 } 1999 2000 /* make sure our `leaf' node's hash is populated */ 2001 dirhash_get(&udf_node->dir_hash); 2002 error = udf_dirhash_fill(udf_node); 2003 if (error) { 2004 dirhash_put(udf_node->dir_hash); 2005 return error; 2006 } 2007 2008 /* check to see if the directory is empty */ 2009 isempty = dirhash_dir_isempty(udf_node->dir_hash); 2010 dirhash_put(udf_node->dir_hash); 2011 2012 if (!isempty) { 2013 vput(vp); 2014 return ENOTEMPTY; 2015 } 2016 2017 /* detach the node from the directory, udf_node is an empty dir here */ 2018 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2019 if (error == 0) { 2020 cache_purge(vp); 2021 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2022 /* 2023 * Bug alert: we need to remove '..' from the detaching 2024 * udf_node so further lookups of this are not possible. This 2025 * prevents a process in a deleted directory from going to its 2026 * deleted parent. Since `udf_node' is guaranteed to be empty 2027 * here, trunc it so no fids are there. 2028 */ 2029 dirhash_purge(&udf_node->dir_hash); 2030 udf_shrink_node(udf_node, 0); 2031 } 2032 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 2033 2034 /* put the node and exit */ 2035 vput(vp); 2036 2037 return error; 2038 } 2039 2040 /* --------------------------------------------------------------------- */ 2041 2042 int 2043 udf_fsync(void *v) 2044 { 2045 struct vop_fsync_args /* { 2046 struct vnode *a_vp; 2047 kauth_cred_t a_cred; 2048 int a_flags; 2049 off_t offlo; 2050 off_t offhi; 2051 struct proc *a_p; 2052 } */ *ap = v; 2053 struct vnode *vp = ap->a_vp; 2054 struct udf_node *udf_node = VTOI(vp); 2055 int error, flags, wait; 2056 2057 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2058 udf_node, 2059 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2060 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2061 2062 /* flush data and wait for it when requested */ 2063 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2064 error = vflushbuf(vp, ap->a_flags); 2065 if (error) 2066 return error; 2067 2068 if (udf_node == NULL) { 2069 printf("udf_fsync() called on NULL udf_node!\n"); 2070 return 0; 2071 } 2072 if (vp->v_tag != VT_UDF) { 2073 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2074 return 0; 2075 } 2076 2077 /* set our times */ 2078 udf_itimes(udf_node, NULL, NULL, NULL); 2079 2080 /* if called when mounted readonly, never write back */ 2081 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2082 return 0; 2083 2084 /* if only data is requested, return */ 2085 if (ap->a_flags & FSYNC_DATAONLY) 2086 return 0; 2087 2088 /* check if the node is dirty 'enough'*/ 2089 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2090 if (flags == 0) 2091 return 0; 2092 2093 /* if we don't have to wait, check for IO pending */ 2094 if (!wait) { 2095 if (vp->v_numoutput > 0) { 2096 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2097 return 0; 2098 } 2099 if (udf_node->outstanding_bufs > 0) { 2100 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2101 return 0; 2102 } 2103 if (udf_node->outstanding_nodedscr > 0) { 2104 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2105 return 0; 2106 } 2107 } 2108 2109 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2110 if (wait) { 2111 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2112 mutex_enter(vp->v_interlock); 2113 while (vp->v_numoutput) { 2114 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2115 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2116 } 2117 mutex_exit(vp->v_interlock); 2118 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2119 } 2120 2121 /* write out node and wait for it if requested */ 2122 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2123 error = udf_writeout_node(udf_node, wait); 2124 if (error) 2125 return error; 2126 2127 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2128 2129 return 0; 2130 } 2131 2132 /* --------------------------------------------------------------------- */ 2133 2134 int 2135 udf_advlock(void *v) 2136 { 2137 struct vop_advlock_args /* { 2138 struct vnode *a_vp; 2139 void *a_id; 2140 int a_op; 2141 struct flock *a_fl; 2142 int a_flags; 2143 } */ *ap = v; 2144 struct vnode *vp = ap->a_vp; 2145 struct udf_node *udf_node = VTOI(vp); 2146 struct file_entry *fe; 2147 struct extfile_entry *efe; 2148 uint64_t file_size; 2149 2150 DPRINTF(LOCKING, ("udf_advlock called\n")); 2151 2152 /* get directory filesize */ 2153 if (udf_node->fe) { 2154 fe = udf_node->fe; 2155 file_size = udf_rw64(fe->inf_len); 2156 } else { 2157 assert(udf_node->efe); 2158 efe = udf_node->efe; 2159 file_size = udf_rw64(efe->inf_len); 2160 } 2161 2162 return lf_advlock(ap, &udf_node->lockf, file_size); 2163 } 2164 2165 /* --------------------------------------------------------------------- */ 2166 2167 /* Global vfs vnode data structures for udfs */ 2168 int (**udf_vnodeop_p)(void *); 2169 2170 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2171 { &vop_default_desc, vn_default_error }, 2172 { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ 2173 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2174 { &vop_create_desc, udf_create }, /* create */ 2175 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2176 { &vop_open_desc, udf_open }, /* open */ 2177 { &vop_close_desc, udf_close }, /* close */ 2178 { &vop_access_desc, udf_access }, /* access */ 2179 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 2180 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2181 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2182 { &vop_read_desc, udf_read }, /* read */ 2183 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2184 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 2185 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 2186 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2187 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2188 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2189 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2190 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2191 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2192 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2193 { &vop_seek_desc, genfs_seek }, /* seek */ 2194 { &vop_remove_desc, udf_remove }, /* remove */ 2195 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2196 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2197 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2198 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2199 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2200 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2201 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2202 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2203 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2204 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2205 { &vop_lock_desc, genfs_lock }, /* lock */ 2206 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2207 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2208 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2209 /* { &vop_print_desc, udf_print }, */ /* print */ 2210 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2211 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2212 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2213 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2214 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2215 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2216 { NULL, NULL } 2217 }; 2218 2219 2220 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2221 &udf_vnodeop_p, udf_vnodeop_entries 2222 }; 2223
Indexes created Sun Sep 21 15:09:59 GMT 2025