udf_vnops.c revision 1.98
1 /* $NetBSD: udf_vnops.c,v 1.98 2015/04/04 12:34:45 riastradh 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 1.98 2015/04/04 12:34:45 riastradh 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 int uerror; 256 257 uerror = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 258 if (error == 0) 259 error = uerror; 260 } 261 } 262 263 return error; 264 } 265 266 /* --------------------------------------------------------------------- */ 267 268 int 269 udf_write(void *v) 270 { 271 struct vop_write_args /* { 272 struct vnode *a_vp; 273 struct uio *a_uio; 274 int a_ioflag; 275 kauth_cred_t a_cred; 276 } */ *ap = v; 277 struct vnode *vp = ap->a_vp; 278 struct uio *uio = ap->a_uio; 279 int ioflag = ap->a_ioflag; 280 kauth_cred_t cred = ap->a_cred; 281 int advice = IO_ADV_DECODE(ap->a_ioflag); 282 struct uvm_object *uobj; 283 struct udf_node *udf_node = VTOI(vp); 284 struct file_entry *fe; 285 struct extfile_entry *efe; 286 uint64_t file_size, old_size, old_offset; 287 vsize_t len; 288 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 289 int error; 290 int resid, extended; 291 292 /* 293 * XXX writing to extended attributes not yet implemented. FreeBSD has 294 * it in mind to forward the IO_EXT read call to the 295 * VOP_READEXTATTR(). 296 */ 297 298 DPRINTF(WRITE, ("udf_write called\n")); 299 300 /* can this happen? some filingsystems have this check */ 301 if (uio->uio_offset < 0) 302 return EINVAL; 303 if (uio->uio_resid == 0) 304 return 0; 305 306 /* protect against rogue programs writing raw directories or links */ 307 if ((ioflag & IO_ALTSEMANTICS) == 0) { 308 if (vp->v_type == VDIR) 309 return EISDIR; 310 /* all but regular files just give EINVAL for now */ 311 if (vp->v_type != VREG) 312 return EINVAL; 313 } 314 315 assert(udf_node); 316 assert(udf_node->fe || udf_node->efe); 317 318 /* get file/directory filesize */ 319 if (udf_node->fe) { 320 fe = udf_node->fe; 321 file_size = udf_rw64(fe->inf_len); 322 } else { 323 assert(udf_node->efe); 324 efe = udf_node->efe; 325 file_size = udf_rw64(efe->inf_len); 326 } 327 old_size = file_size; 328 329 /* if explicitly asked to append, uio_offset can be wrong? */ 330 if (ioflag & IO_APPEND) 331 uio->uio_offset = file_size; 332 333 extended = (uio->uio_offset + uio->uio_resid > file_size); 334 if (extended) { 335 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 336 file_size, uio->uio_offset + uio->uio_resid)); 337 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 338 if (error) 339 return error; 340 file_size = uio->uio_offset + uio->uio_resid; 341 } 342 343 /* write contents using buffercache */ 344 uobj = &vp->v_uobj; 345 resid = uio->uio_resid; 346 error = 0; 347 348 uvm_vnp_setwritesize(vp, file_size); 349 old_offset = uio->uio_offset; 350 while (uio->uio_resid > 0) { 351 /* maximise length to file extremity */ 352 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 353 if (len == 0) 354 break; 355 356 genfs_node_wrlock(vp); 357 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 358 genfs_node_unlock(vp); 359 if (error) 360 break; 361 362 /* ubc, here we come, prepare to trap */ 363 error = ubc_uiomove(uobj, uio, len, advice, 364 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 365 if (error) 366 break; 367 368 /* 369 * flush what we just wrote if necessary. 370 * XXXUBC simplistic async flushing. 371 * 372 * Directories are excluded since its file data that we want 373 * to purge. 374 */ 375 if ((vp->v_type != VDIR) && 376 (old_offset >> 16 != uio->uio_offset >> 16)) { 377 mutex_enter(vp->v_interlock); 378 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 379 (uio->uio_offset >> 16) << 16, 380 PGO_CLEANIT | PGO_LAZY); 381 old_offset = uio->uio_offset; 382 } 383 } 384 uvm_vnp_setsize(vp, file_size); 385 386 /* mark node changed and request update */ 387 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 388 if (vp->v_mount->mnt_flag & MNT_RELATIME) 389 udf_node->i_flags |= IN_ACCESS; 390 391 /* 392 * XXX TODO FFS has code here to reset setuid & setgid when we're not 393 * the superuser as a precaution against tampering. 394 */ 395 396 /* if we wrote a thing, note write action on vnode */ 397 if (resid > uio->uio_resid) 398 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 399 400 if (error) { 401 /* bring back file size to its former size */ 402 /* take notice of its errors? */ 403 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 404 405 /* roll back uio */ 406 uio->uio_offset -= resid - uio->uio_resid; 407 uio->uio_resid = resid; 408 } else { 409 /* if we write and we're synchronous, update node */ 410 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 411 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 412 } 413 414 return error; 415 } 416 417 418 /* --------------------------------------------------------------------- */ 419 420 /* 421 * `Special' bmap functionality that translates all incomming requests to 422 * translate to vop_strategy() calls with the same blocknumbers effectively 423 * not translating at all. 424 */ 425 426 int 427 udf_trivial_bmap(void *v) 428 { 429 struct vop_bmap_args /* { 430 struct vnode *a_vp; 431 daddr_t a_bn; 432 struct vnode **a_vpp; 433 daddr_t *a_bnp; 434 int *a_runp; 435 } */ *ap = v; 436 struct vnode *vp = ap->a_vp; /* our node */ 437 struct vnode **vpp = ap->a_vpp; /* return node */ 438 daddr_t *bnp = ap->a_bnp; /* translated */ 439 daddr_t bn = ap->a_bn; /* origional */ 440 int *runp = ap->a_runp; 441 struct udf_node *udf_node = VTOI(vp); 442 uint32_t lb_size; 443 444 /* get logical block size */ 445 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 446 447 /* could return `-1' to indicate holes/zeros */ 448 /* translate 1:1 */ 449 *bnp = bn; 450 451 /* set the vnode to read the data from with strategy on itself */ 452 if (vpp) 453 *vpp = vp; 454 455 /* set runlength of maximum block size */ 456 if (runp) 457 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 458 459 /* return success */ 460 return 0; 461 } 462 463 /* --------------------------------------------------------------------- */ 464 465 int 466 udf_vfsstrategy(void *v) 467 { 468 struct vop_strategy_args /* { 469 struct vnode *a_vp; 470 struct buf *a_bp; 471 } */ *ap = v; 472 struct vnode *vp = ap->a_vp; 473 struct buf *bp = ap->a_bp; 474 struct udf_node *udf_node = VTOI(vp); 475 uint32_t lb_size, sectors; 476 477 DPRINTF(STRATEGY, ("udf_strategy called\n")); 478 479 /* check if we ought to be here */ 480 if (vp->v_type == VBLK || vp->v_type == VCHR) 481 panic("udf_strategy: spec"); 482 483 /* only filebuffers ought to be read/write by this, no descriptors */ 484 assert(bp->b_blkno >= 0); 485 486 /* get sector size */ 487 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 488 489 /* calculate length to fetch/store in sectors */ 490 sectors = bp->b_bcount / lb_size; 491 assert(bp->b_bcount > 0); 492 493 /* NEVER assume later that this buffer is already translated */ 494 /* bp->b_lblkno = bp->b_blkno; */ 495 496 /* check assertions: we OUGHT to always get multiples of this */ 497 assert(sectors * lb_size == bp->b_bcount); 498 __USE(sectors); 499 500 /* issue buffer */ 501 if (bp->b_flags & B_READ) { 502 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 503 ", for %d sectors\n", 504 vp, bp, bp->b_blkno, sectors)); 505 506 /* read buffer from the udf_node, translate vtop on the way*/ 507 udf_read_filebuf(udf_node, bp); 508 } else { 509 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 510 ", for %d sectors\n", 511 vp, bp, bp->b_blkno, sectors)); 512 513 /* write buffer to the udf_node, translate vtop on the way*/ 514 udf_write_filebuf(udf_node, bp); 515 } 516 517 return bp->b_error; 518 } 519 520 /* --------------------------------------------------------------------- */ 521 522 int 523 udf_readdir(void *v) 524 { 525 struct vop_readdir_args /* { 526 struct vnode *a_vp; 527 struct uio *a_uio; 528 kauth_cred_t a_cred; 529 int *a_eofflag; 530 off_t **a_cookies; 531 int *a_ncookies; 532 } */ *ap = v; 533 struct uio *uio = ap->a_uio; 534 struct vnode *vp = ap->a_vp; 535 struct udf_node *udf_node = VTOI(vp); 536 struct file_entry *fe; 537 struct extfile_entry *efe; 538 struct fileid_desc *fid; 539 struct dirent *dirent; 540 uint64_t file_size, diroffset, transoffset; 541 uint32_t lb_size; 542 int error; 543 544 DPRINTF(READDIR, ("udf_readdir called\n")); 545 546 /* This operation only makes sense on directory nodes. */ 547 if (vp->v_type != VDIR) 548 return ENOTDIR; 549 550 /* get directory filesize */ 551 if (udf_node->fe) { 552 fe = udf_node->fe; 553 file_size = udf_rw64(fe->inf_len); 554 } else { 555 assert(udf_node->efe); 556 efe = udf_node->efe; 557 file_size = udf_rw64(efe->inf_len); 558 } 559 560 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 561 562 /* 563 * Add `.' pseudo entry if at offset zero since its not in the fid 564 * stream 565 */ 566 if (uio->uio_offset == 0) { 567 DPRINTF(READDIR, ("\t'.' inserted\n")); 568 strcpy(dirent->d_name, "."); 569 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 570 dirent->d_type = DT_DIR; 571 dirent->d_namlen = strlen(dirent->d_name); 572 dirent->d_reclen = _DIRENT_SIZE(dirent); 573 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 574 575 /* mark with magic value that we have done the dummy */ 576 uio->uio_offset = UDF_DIRCOOKIE_DOT; 577 } 578 579 /* we are called just as long as we keep on pushing data in */ 580 error = 0; 581 if (uio->uio_offset < file_size) { 582 /* allocate temporary space for fid */ 583 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 584 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 585 586 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 587 uio->uio_offset = 0; 588 589 diroffset = uio->uio_offset; 590 transoffset = diroffset; 591 while (diroffset < file_size) { 592 DPRINTF(READDIR, ("\tread in fid stream\n")); 593 /* transfer a new fid/dirent */ 594 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 595 DPRINTFIF(READDIR, error, ("read error in read fid " 596 "stream : %d\n", error)); 597 if (error) 598 break; 599 600 /* 601 * If there isn't enough space in the uio to return a 602 * whole dirent, break off read 603 */ 604 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 605 break; 606 607 /* remember the last entry we transfered */ 608 transoffset = diroffset; 609 610 /* skip deleted entries */ 611 if (fid->file_char & UDF_FILE_CHAR_DEL) 612 continue; 613 614 /* skip not visible files */ 615 if (fid->file_char & UDF_FILE_CHAR_VIS) 616 continue; 617 618 /* copy dirent to the caller */ 619 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 620 dirent->d_name, dirent->d_type)); 621 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 622 } 623 624 /* pass on last transfered offset */ 625 uio->uio_offset = transoffset; 626 free(fid, M_UDFTEMP); 627 } 628 629 if (ap->a_eofflag) 630 *ap->a_eofflag = (uio->uio_offset >= file_size); 631 632 #ifdef DEBUG 633 if (udf_verbose & UDF_DEBUG_READDIR) { 634 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 635 if (ap->a_eofflag) 636 printf("returning EOF ? %d\n", *ap->a_eofflag); 637 if (error) 638 printf("readdir returning error %d\n", error); 639 } 640 #endif 641 642 free(dirent, M_UDFTEMP); 643 return error; 644 } 645 646 /* --------------------------------------------------------------------- */ 647 648 int 649 udf_lookup(void *v) 650 { 651 struct vop_lookup_v2_args /* { 652 struct vnode *a_dvp; 653 struct vnode **a_vpp; 654 struct componentname *a_cnp; 655 } */ *ap = v; 656 struct vnode *dvp = ap->a_dvp; 657 struct vnode **vpp = ap->a_vpp; 658 struct componentname *cnp = ap->a_cnp; 659 struct udf_node *dir_node, *res_node; 660 struct udf_mount *ump; 661 struct long_ad icb_loc; 662 mode_t mode; 663 uid_t d_uid; 664 gid_t d_gid; 665 const char *name; 666 int namelen, nameiop, islastcn, mounted_ro; 667 int error, found; 668 669 dir_node = VTOI(dvp); 670 ump = dir_node->ump; 671 *vpp = NULL; 672 673 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 674 cnp->cn_nameptr)); 675 676 /* simplify/clarification flags */ 677 nameiop = cnp->cn_nameiop; 678 islastcn = cnp->cn_flags & ISLASTCN; 679 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 680 681 /* check exec/dirread permissions first */ 682 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 683 if (error) 684 return error; 685 686 DPRINTF(LOOKUP, ("\taccess ok\n")); 687 688 /* 689 * If requesting a modify on the last path element on a read-only 690 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 691 */ 692 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 693 return EROFS; 694 695 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 696 cnp->cn_nameptr)); 697 /* look in the namecache */ 698 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 699 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 700 return *vpp == NULLVP ? ENOENT : 0; 701 } 702 703 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 704 705 /* 706 * Obviously, the file is not (anymore) in the namecache, we have to 707 * search for it. There are three basic cases: '.', '..' and others. 708 * 709 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 710 */ 711 error = 0; 712 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 713 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 714 /* special case 1 '.' */ 715 if (islastcn && cnp->cn_nameiop == RENAME) { 716 error = EISDIR; 717 goto out; 718 } 719 vref(dvp); 720 *vpp = dvp; 721 /* done */ 722 goto done; 723 } else if (cnp->cn_flags & ISDOTDOT) { 724 /* special case 2 '..' */ 725 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 726 727 if (islastcn && cnp->cn_nameiop == RENAME) { 728 error = EINVAL; 729 goto out; 730 } 731 732 /* get our node */ 733 name = ".."; 734 namelen = 2; 735 error = udf_lookup_name_in_dir(dvp, name, namelen, 736 &icb_loc, &found); 737 if (error) 738 goto out; 739 if (!found) 740 error = ENOENT; 741 742 /* first unlock parent */ 743 VOP_UNLOCK(dvp); 744 745 if (error == 0) { 746 DPRINTF(LOOKUP, ("\tfound '..'\n")); 747 /* try to create/reuse the node */ 748 error = udf_get_node(ump, &icb_loc, &res_node); 749 750 if (!error) { 751 DPRINTF(LOOKUP, 752 ("\tnode retrieved/created OK\n")); 753 *vpp = res_node->vnode; 754 } 755 } 756 757 /* try to relock parent */ 758 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 759 goto out; 760 } 761 762 /* all other files */ 763 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 764 765 /* lookup filename in the directory; location icb_loc */ 766 name = cnp->cn_nameptr; 767 namelen = cnp->cn_namelen; 768 error = udf_lookup_name_in_dir(dvp, name, namelen, 769 &icb_loc, &found); 770 if (error) 771 goto out; 772 if (!found) { 773 DPRINTF(LOOKUP, ("\tNOT found\n")); 774 /* 775 * The entry was not found in the directory. This is 776 * valid if we are creating or renaming an entry and 777 * are working on the last component of the path name. 778 */ 779 if (islastcn && (cnp->cn_nameiop == CREATE || 780 cnp->cn_nameiop == RENAME)) { 781 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 782 if (error) { 783 goto out; 784 } 785 error = EJUSTRETURN; 786 } else { 787 error = ENOENT; 788 } 789 /* done */ 790 goto done; 791 } 792 793 /* 794 * XXX NOTE tmpfs has a test here that tests that intermediate 795 * components i.e. not the last one ought to be either a directory or 796 * a link. It seems to function well without this code. 797 */ 798 799 /* try to create/reuse the node */ 800 error = udf_get_node(ump, &icb_loc, &res_node); 801 if (error) 802 goto out; 803 804 /* check permissions */ 805 if (islastcn && (cnp->cn_nameiop == DELETE || 806 cnp->cn_nameiop == RENAME) ) { 807 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 808 if (error) { 809 vput(res_node->vnode); 810 goto out; 811 } 812 813 /* 814 * Check if the directory has its sticky bit set. If so, ask 815 * for clearance since only the owner of a file or directory 816 * can remove/rename from taht directory. 817 */ 818 mode = udf_getaccessmode(dir_node); 819 if ((mode & S_ISTXT) != 0) { 820 udf_getownership(dir_node, &d_uid, &d_gid); 821 error = kauth_authorize_vnode(cnp->cn_cred, 822 KAUTH_VNODE_DELETE, res_node->vnode, 823 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 824 d_uid, d_uid)); 825 if (error) { 826 error = EPERM; 827 vput(res_node->vnode); 828 goto out; 829 } 830 } 831 } 832 833 *vpp = res_node->vnode; 834 835 done: 836 /* 837 * Store result in the cache if requested. If we are creating a file, 838 * the file might not be found and thus putting it into the namecache 839 * might be seen as negative caching. 840 */ 841 if (nameiop != CREATE) 842 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 843 cnp->cn_flags); 844 845 out: 846 if (error == 0 && *vpp != dvp) 847 VOP_UNLOCK(*vpp); 848 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 849 850 return error; 851 } 852 853 /* --------------------------------------------------------------------- */ 854 855 int 856 udf_getattr(void *v) 857 { 858 struct vop_getattr_args /* { 859 struct vnode *a_vp; 860 struct vattr *a_vap; 861 kauth_cred_t a_cred; 862 struct lwp *a_l; 863 } */ *ap = v; 864 struct vnode *vp = ap->a_vp; 865 struct udf_node *udf_node = VTOI(vp); 866 struct udf_mount *ump = udf_node->ump; 867 struct file_entry *fe = udf_node->fe; 868 struct extfile_entry *efe = udf_node->efe; 869 struct filetimes_extattr_entry *ft_extattr; 870 struct device_extattr_entry *devattr; 871 struct vattr *vap = ap->a_vap; 872 struct timestamp *atime, *mtime, *attrtime, *creatime; 873 uint64_t filesize, blkssize; 874 uint32_t nlink; 875 uint32_t offset, a_l; 876 uint8_t *filedata, *targetbuf; 877 uid_t uid; 878 gid_t gid; 879 int length, error; 880 881 DPRINTF(CALL, ("udf_getattr called\n")); 882 883 /* update times before we returning values */ 884 udf_itimes(udf_node, NULL, NULL, NULL); 885 886 /* get descriptor information */ 887 if (fe) { 888 nlink = udf_rw16(fe->link_cnt); 889 uid = (uid_t)udf_rw32(fe->uid); 890 gid = (gid_t)udf_rw32(fe->gid); 891 filesize = udf_rw64(fe->inf_len); 892 blkssize = udf_rw64(fe->logblks_rec); 893 atime = &fe->atime; 894 mtime = &fe->mtime; 895 attrtime = &fe->attrtime; 896 filedata = fe->data; 897 898 /* initial guess */ 899 creatime = mtime; 900 901 /* check our extended attribute if present */ 902 error = udf_extattr_search_intern(udf_node, 903 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 904 if (!error) { 905 ft_extattr = (struct filetimes_extattr_entry *) 906 (filedata + offset); 907 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 908 creatime = &ft_extattr->times[0]; 909 } 910 } else { 911 assert(udf_node->efe); 912 nlink = udf_rw16(efe->link_cnt); 913 uid = (uid_t)udf_rw32(efe->uid); 914 gid = (gid_t)udf_rw32(efe->gid); 915 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 916 blkssize = udf_rw64(efe->logblks_rec); 917 atime = &efe->atime; 918 mtime = &efe->mtime; 919 attrtime = &efe->attrtime; 920 creatime = &efe->ctime; 921 filedata = efe->data; 922 } 923 924 /* do the uid/gid translation game */ 925 if (uid == (uid_t) -1) 926 uid = ump->mount_args.anon_uid; 927 if (gid == (gid_t) -1) 928 gid = ump->mount_args.anon_gid; 929 930 /* fill in struct vattr with values from the node */ 931 vattr_null(vap); 932 vap->va_type = vp->v_type; 933 vap->va_mode = udf_getaccessmode(udf_node); 934 vap->va_nlink = nlink; 935 vap->va_uid = uid; 936 vap->va_gid = gid; 937 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 938 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 939 vap->va_size = filesize; 940 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 941 942 /* 943 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 944 * 1 to the link count if its a directory we're requested attributes 945 * of. 946 */ 947 if (vap->va_type == VDIR) 948 vap->va_nlink++; 949 950 /* 951 * BUG-ALERT: Posix requires the va_size to be pathlength for symbolic 952 * links. 953 */ 954 if (vap->va_type == VLNK) { 955 /* claim temporary buffers for translation */ 956 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 957 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 958 if (!error) { 959 vap->va_size = length; 960 KASSERT(length == strlen(targetbuf)); 961 } 962 free(targetbuf, M_UDFTEMP); 963 /* XXX return error? */ 964 } 965 966 /* access times */ 967 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 968 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 969 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 970 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 971 972 vap->va_gen = 1; /* no multiple generations yes (!?) */ 973 vap->va_flags = 0; /* no flags */ 974 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 975 vap->va_filerev = 1; /* TODO file revision numbers? */ 976 vap->va_vaflags = 0; 977 /* TODO get vaflags from the extended attributes? */ 978 979 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 980 error = udf_extattr_search_intern(udf_node, 981 UDF_DEVICESPEC_ATTR_NO, "", 982 &offset, &a_l); 983 /* if error, deny access */ 984 if (error || (filedata == NULL)) { 985 vap->va_mode = 0; /* or v_type = VNON? */ 986 } else { 987 devattr = (struct device_extattr_entry *) 988 filedata + offset; 989 vap->va_rdev = makedev( 990 udf_rw32(devattr->major), 991 udf_rw32(devattr->minor) 992 ); 993 /* TODO we could check the implementator */ 994 } 995 } 996 997 return 0; 998 } 999 1000 /* --------------------------------------------------------------------- */ 1001 1002 static int 1003 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 1004 kauth_cred_t cred) 1005 { 1006 struct udf_node *udf_node = VTOI(vp); 1007 uid_t uid; 1008 gid_t gid; 1009 int error; 1010 1011 #ifdef notyet 1012 /* TODO get vaflags from the extended attributes? */ 1013 /* Immutable or append-only files cannot be modified, either. */ 1014 if (udf_node->flags & (IMMUTABLE | APPEND)) 1015 return EPERM; 1016 #endif 1017 1018 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1019 return EROFS; 1020 1021 /* retrieve old values */ 1022 udf_getownership(udf_node, &uid, &gid); 1023 1024 /* only one could be specified */ 1025 if (new_uid == VNOVAL) 1026 new_uid = uid; 1027 if (new_gid == VNOVAL) 1028 new_gid = gid; 1029 1030 /* check if we can fit it in an 32 bits */ 1031 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1032 return EINVAL; 1033 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1034 return EINVAL; 1035 1036 /* check permissions */ 1037 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1038 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1039 if (error) 1040 return (error); 1041 1042 /* change the ownership */ 1043 udf_setownership(udf_node, new_uid, new_gid); 1044 1045 /* mark node changed */ 1046 udf_node->i_flags |= IN_CHANGE; 1047 1048 return 0; 1049 } 1050 1051 1052 static int 1053 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1054 { 1055 struct udf_node *udf_node = VTOI(vp); 1056 uid_t uid; 1057 gid_t gid; 1058 int error; 1059 1060 #ifdef notyet 1061 /* TODO get vaflags from the extended attributes? */ 1062 /* Immutable or append-only files cannot be modified, either. */ 1063 if (udf_node->flags & (IMMUTABLE | APPEND)) 1064 return EPERM; 1065 #endif 1066 1067 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1068 return EROFS; 1069 1070 /* retrieve uid/gid values */ 1071 udf_getownership(udf_node, &uid, &gid); 1072 1073 /* check permissions */ 1074 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1075 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1076 if (error) 1077 return (error); 1078 1079 /* change mode */ 1080 udf_setaccessmode(udf_node, mode); 1081 1082 /* mark node changed */ 1083 udf_node->i_flags |= IN_CHANGE; 1084 1085 return 0; 1086 } 1087 1088 1089 /* exported */ 1090 int 1091 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1092 { 1093 struct udf_node *udf_node = VTOI(vp); 1094 int error, extended; 1095 1096 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1097 return EROFS; 1098 1099 /* Decide whether this is a valid operation based on the file type. */ 1100 switch (vp->v_type) { 1101 case VDIR: 1102 return EISDIR; 1103 case VREG: 1104 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1105 return EROFS; 1106 break; 1107 case VBLK: 1108 /* FALLTHROUGH */ 1109 case VCHR: 1110 /* FALLTHROUGH */ 1111 case VFIFO: 1112 /* Allow modifications of special files even if in the file 1113 * system is mounted read-only (we are not modifying the 1114 * files themselves, but the objects they represent). */ 1115 return 0; 1116 default: 1117 /* Anything else is unsupported. */ 1118 return EOPNOTSUPP; 1119 } 1120 1121 #if notyet 1122 /* TODO get vaflags from the extended attributes? */ 1123 /* Immutable or append-only files cannot be modified, either. */ 1124 if (node->flags & (IMMUTABLE | APPEND)) 1125 return EPERM; 1126 #endif 1127 1128 /* resize file to the requested size */ 1129 error = udf_resize_node(udf_node, newsize, &extended); 1130 1131 if (error == 0) { 1132 /* mark change */ 1133 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1134 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1135 udf_node->i_flags |= IN_ACCESS; 1136 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1137 udf_update(vp, NULL, NULL, NULL, 0); 1138 } 1139 1140 return error; 1141 } 1142 1143 1144 static int 1145 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1146 { 1147 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1148 return EROFS; 1149 1150 /* 1151 * XXX we can't do this yet, as its not described in the standard yet 1152 */ 1153 1154 return EOPNOTSUPP; 1155 } 1156 1157 1158 static int 1159 udf_chtimes(struct vnode *vp, 1160 struct timespec *atime, struct timespec *mtime, 1161 struct timespec *birthtime, int setattrflags, 1162 kauth_cred_t cred) 1163 { 1164 struct udf_node *udf_node = VTOI(vp); 1165 uid_t uid; 1166 gid_t gid; 1167 int error; 1168 1169 #ifdef notyet 1170 /* TODO get vaflags from the extended attributes? */ 1171 /* Immutable or append-only files cannot be modified, either. */ 1172 if (udf_node->flags & (IMMUTABLE | APPEND)) 1173 return EPERM; 1174 #endif 1175 1176 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1177 return EROFS; 1178 1179 /* retrieve uid/gid values */ 1180 udf_getownership(udf_node, &uid, &gid); 1181 1182 /* check permissions */ 1183 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1184 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1185 if (error) 1186 return (error); 1187 1188 /* update node flags depending on what times are passed */ 1189 if (atime->tv_sec != VNOVAL) 1190 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1191 udf_node->i_flags |= IN_ACCESS; 1192 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1193 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1194 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1195 udf_node->i_flags |= IN_ACCESS; 1196 } 1197 1198 return udf_update(vp, atime, mtime, birthtime, 0); 1199 } 1200 1201 1202 int 1203 udf_setattr(void *v) 1204 { 1205 struct vop_setattr_args /* { 1206 struct vnode *a_vp; 1207 struct vattr *a_vap; 1208 kauth_cred_t a_cred; 1209 struct lwp *a_l; 1210 } */ *ap = v; 1211 struct vnode *vp = ap->a_vp; 1212 /* struct udf_node *udf_node = VTOI(vp); */ 1213 /* struct udf_mount *ump = udf_node->ump; */ 1214 kauth_cred_t cred = ap->a_cred; 1215 struct vattr *vap = ap->a_vap; 1216 int error; 1217 1218 DPRINTF(CALL, ("udf_setattr called\n")); 1219 1220 /* Abort if any unsettable attribute is given. */ 1221 error = 0; 1222 if (vap->va_type != VNON || 1223 vap->va_nlink != VNOVAL || 1224 vap->va_fsid != VNOVAL || 1225 vap->va_fileid != VNOVAL || 1226 vap->va_blocksize != VNOVAL || 1227 #ifdef notyet 1228 /* checks are debated */ 1229 vap->va_ctime.tv_sec != VNOVAL || 1230 vap->va_ctime.tv_nsec != VNOVAL || 1231 vap->va_birthtime.tv_sec != VNOVAL || 1232 vap->va_birthtime.tv_nsec != VNOVAL || 1233 #endif 1234 vap->va_gen != VNOVAL || 1235 vap->va_rdev != VNOVAL || 1236 vap->va_bytes != VNOVAL) 1237 error = EINVAL; 1238 1239 DPRINTF(ATTR, ("setattr changing:\n")); 1240 if (error == 0 && (vap->va_flags != VNOVAL)) { 1241 DPRINTF(ATTR, ("\tchflags\n")); 1242 error = udf_chflags(vp, vap->va_flags, cred); 1243 } 1244 1245 if (error == 0 && (vap->va_size != VNOVAL)) { 1246 DPRINTF(ATTR, ("\tchsize\n")); 1247 error = udf_chsize(vp, vap->va_size, cred); 1248 } 1249 1250 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1251 DPRINTF(ATTR, ("\tchown\n")); 1252 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1253 } 1254 1255 if (error == 0 && (vap->va_mode != VNOVAL)) { 1256 DPRINTF(ATTR, ("\tchmod\n")); 1257 error = udf_chmod(vp, vap->va_mode, cred); 1258 } 1259 1260 if (error == 0 && 1261 ((vap->va_atime.tv_sec != VNOVAL && 1262 vap->va_atime.tv_nsec != VNOVAL) || 1263 (vap->va_mtime.tv_sec != VNOVAL && 1264 vap->va_mtime.tv_nsec != VNOVAL)) 1265 ) { 1266 DPRINTF(ATTR, ("\tchtimes\n")); 1267 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1268 &vap->va_birthtime, vap->va_vaflags, cred); 1269 } 1270 VN_KNOTE(vp, NOTE_ATTRIB); 1271 1272 return error; 1273 } 1274 1275 /* --------------------------------------------------------------------- */ 1276 1277 /* 1278 * Return POSIX pathconf information for UDF file systems. 1279 */ 1280 int 1281 udf_pathconf(void *v) 1282 { 1283 struct vop_pathconf_args /* { 1284 struct vnode *a_vp; 1285 int a_name; 1286 register_t *a_retval; 1287 } */ *ap = v; 1288 uint32_t bits; 1289 1290 DPRINTF(CALL, ("udf_pathconf called\n")); 1291 1292 switch (ap->a_name) { 1293 case _PC_LINK_MAX: 1294 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1295 return 0; 1296 case _PC_NAME_MAX: 1297 *ap->a_retval = UDF_MAXNAMLEN; 1298 return 0; 1299 case _PC_PATH_MAX: 1300 *ap->a_retval = PATH_MAX; 1301 return 0; 1302 case _PC_PIPE_BUF: 1303 *ap->a_retval = PIPE_BUF; 1304 return 0; 1305 case _PC_CHOWN_RESTRICTED: 1306 *ap->a_retval = 1; 1307 return 0; 1308 case _PC_NO_TRUNC: 1309 *ap->a_retval = 1; 1310 return 0; 1311 case _PC_SYNC_IO: 1312 *ap->a_retval = 0; /* synchronised is off for performance */ 1313 return 0; 1314 case _PC_FILESIZEBITS: 1315 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1316 bits = 64; /* XXX ought to deliver 65 */ 1317 #if 0 1318 if (udf_node) 1319 bits = 64 * vp->v_mount->mnt_dev_bshift; 1320 #endif 1321 *ap->a_retval = bits; 1322 return 0; 1323 } 1324 1325 return EINVAL; 1326 } 1327 1328 1329 /* --------------------------------------------------------------------- */ 1330 1331 int 1332 udf_open(void *v) 1333 { 1334 struct vop_open_args /* { 1335 struct vnode *a_vp; 1336 int a_mode; 1337 kauth_cred_t a_cred; 1338 struct proc *a_p; 1339 } */ *ap = v; 1340 int flags; 1341 1342 DPRINTF(CALL, ("udf_open called\n")); 1343 1344 /* 1345 * Files marked append-only must be opened for appending. 1346 * TODO: get chflags(2) flags from extened attribute. 1347 */ 1348 flags = 0; 1349 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1350 return (EPERM); 1351 1352 return 0; 1353 } 1354 1355 1356 /* --------------------------------------------------------------------- */ 1357 1358 int 1359 udf_close(void *v) 1360 { 1361 struct vop_close_args /* { 1362 struct vnode *a_vp; 1363 int a_fflag; 1364 kauth_cred_t a_cred; 1365 struct proc *a_p; 1366 } */ *ap = v; 1367 struct vnode *vp = ap->a_vp; 1368 struct udf_node *udf_node = VTOI(vp); 1369 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1370 int error; 1371 1372 DPRINTF(CALL, ("udf_close called\n")); 1373 udf_node = udf_node; /* shut up gcc */ 1374 1375 if (!async && (vp->v_type != VDIR)) { 1376 mutex_enter(vp->v_interlock); 1377 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1378 if (error) 1379 return error; 1380 } 1381 1382 mutex_enter(vp->v_interlock); 1383 if (vp->v_usecount > 1) 1384 udf_itimes(udf_node, NULL, NULL, NULL); 1385 mutex_exit(vp->v_interlock); 1386 1387 return 0; 1388 } 1389 1390 1391 /* --------------------------------------------------------------------- */ 1392 1393 static int 1394 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1395 { 1396 int flags; 1397 1398 /* check if we are allowed to write */ 1399 switch (vap->va_type) { 1400 case VDIR: 1401 case VLNK: 1402 case VREG: 1403 /* 1404 * normal nodes: check if we're on a read-only mounted 1405 * filingsystem and bomb out if we're trying to write. 1406 */ 1407 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1408 return EROFS; 1409 break; 1410 case VBLK: 1411 case VCHR: 1412 case VSOCK: 1413 case VFIFO: 1414 /* 1415 * special nodes: even on read-only mounted filingsystems 1416 * these are allowed to be written to if permissions allow. 1417 */ 1418 break; 1419 default: 1420 /* no idea what this is */ 1421 return EINVAL; 1422 } 1423 1424 /* noone may write immutable files */ 1425 /* TODO: get chflags(2) flags from extened attribute. */ 1426 flags = 0; 1427 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1428 return EPERM; 1429 1430 return 0; 1431 } 1432 1433 static int 1434 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1435 kauth_cred_t cred) 1436 { 1437 /* ask the generic genfs_can_access to advice on security */ 1438 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1439 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1440 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1441 } 1442 1443 int 1444 udf_access(void *v) 1445 { 1446 struct vop_access_args /* { 1447 struct vnode *a_vp; 1448 int a_mode; 1449 kauth_cred_t a_cred; 1450 struct proc *a_p; 1451 } */ *ap = v; 1452 struct vnode *vp = ap->a_vp; 1453 mode_t mode = ap->a_mode; 1454 kauth_cred_t cred = ap->a_cred; 1455 /* struct udf_node *udf_node = VTOI(vp); */ 1456 struct vattr vap; 1457 int error; 1458 1459 DPRINTF(CALL, ("udf_access called\n")); 1460 1461 error = VOP_GETATTR(vp, &vap, NULL); 1462 if (error) 1463 return error; 1464 1465 error = udf_check_possible(vp, &vap, mode); 1466 if (error) 1467 return error; 1468 1469 error = udf_check_permitted(vp, &vap, mode, cred); 1470 1471 return error; 1472 } 1473 1474 /* --------------------------------------------------------------------- */ 1475 1476 int 1477 udf_create(void *v) 1478 { 1479 struct vop_create_v3_args /* { 1480 struct vnode *a_dvp; 1481 struct vnode **a_vpp; 1482 struct componentname *a_cnp; 1483 struct vattr *a_vap; 1484 } */ *ap = v; 1485 struct vnode *dvp = ap->a_dvp; 1486 struct vnode **vpp = ap->a_vpp; 1487 struct vattr *vap = ap->a_vap; 1488 struct componentname *cnp = ap->a_cnp; 1489 int error; 1490 1491 DPRINTF(CALL, ("udf_create called\n")); 1492 error = udf_create_node(dvp, vpp, vap, cnp); 1493 1494 return error; 1495 } 1496 1497 /* --------------------------------------------------------------------- */ 1498 1499 int 1500 udf_mknod(void *v) 1501 { 1502 struct vop_mknod_v3_args /* { 1503 struct vnode *a_dvp; 1504 struct vnode **a_vpp; 1505 struct componentname *a_cnp; 1506 struct vattr *a_vap; 1507 } */ *ap = v; 1508 struct vnode *dvp = ap->a_dvp; 1509 struct vnode **vpp = ap->a_vpp; 1510 struct vattr *vap = ap->a_vap; 1511 struct componentname *cnp = ap->a_cnp; 1512 int error; 1513 1514 DPRINTF(CALL, ("udf_mknod called\n")); 1515 error = udf_create_node(dvp, vpp, vap, cnp); 1516 1517 return error; 1518 } 1519 1520 /* --------------------------------------------------------------------- */ 1521 1522 int 1523 udf_mkdir(void *v) 1524 { 1525 struct vop_mkdir_v3_args /* { 1526 struct vnode *a_dvp; 1527 struct vnode **a_vpp; 1528 struct componentname *a_cnp; 1529 struct vattr *a_vap; 1530 } */ *ap = v; 1531 struct vnode *dvp = ap->a_dvp; 1532 struct vnode **vpp = ap->a_vpp; 1533 struct vattr *vap = ap->a_vap; 1534 struct componentname *cnp = ap->a_cnp; 1535 int error; 1536 1537 DPRINTF(CALL, ("udf_mkdir called\n")); 1538 error = udf_create_node(dvp, vpp, vap, cnp); 1539 1540 return error; 1541 } 1542 1543 /* --------------------------------------------------------------------- */ 1544 1545 static int 1546 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1547 { 1548 struct udf_node *udf_node, *dir_node; 1549 struct vattr vap; 1550 int error; 1551 1552 DPRINTF(CALL, ("udf_link called\n")); 1553 KASSERT(dvp != vp); 1554 KASSERT(vp->v_type != VDIR); 1555 KASSERT(dvp->v_mount == vp->v_mount); 1556 1557 /* get attributes */ 1558 dir_node = VTOI(dvp); 1559 udf_node = VTOI(vp); 1560 1561 error = VOP_GETATTR(vp, &vap, FSCRED); 1562 if (error) { 1563 VOP_UNLOCK(vp); 1564 return error; 1565 } 1566 1567 /* check link count overflow */ 1568 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1569 VOP_UNLOCK(vp); 1570 return EMLINK; 1571 } 1572 1573 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1574 if (error) 1575 VOP_UNLOCK(vp); 1576 return error; 1577 } 1578 1579 int 1580 udf_link(void *v) 1581 { 1582 struct vop_link_args /* { 1583 struct vnode *a_dvp; 1584 struct vnode *a_vp; 1585 struct componentname *a_cnp; 1586 } */ *ap = v; 1587 struct vnode *dvp = ap->a_dvp; 1588 struct vnode *vp = ap->a_vp; 1589 struct componentname *cnp = ap->a_cnp; 1590 int error; 1591 1592 error = udf_do_link(dvp, vp, cnp); 1593 if (error) 1594 VOP_ABORTOP(dvp, cnp); 1595 1596 VN_KNOTE(vp, NOTE_LINK); 1597 VN_KNOTE(dvp, NOTE_WRITE); 1598 vput(dvp); 1599 1600 return error; 1601 } 1602 1603 /* --------------------------------------------------------------------- */ 1604 1605 static int 1606 udf_do_symlink(struct udf_node *udf_node, char *target) 1607 { 1608 struct pathcomp pathcomp; 1609 uint8_t *pathbuf, *pathpos, *compnamepos; 1610 char *mntonname; 1611 int pathlen, len, compnamelen, mntonnamelen; 1612 int error; 1613 1614 /* process `target' to an UDF structure */ 1615 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1616 pathpos = pathbuf; 1617 pathlen = 0; 1618 1619 if (*target == '/') { 1620 /* symlink starts from the root */ 1621 len = UDF_PATH_COMP_SIZE; 1622 memset(&pathcomp, 0, len); 1623 pathcomp.type = UDF_PATH_COMP_ROOT; 1624 1625 /* check if its mount-point relative! */ 1626 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1627 mntonnamelen = strlen(mntonname); 1628 if (strlen(target) >= mntonnamelen) { 1629 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1630 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1631 target += mntonnamelen; 1632 } 1633 } else { 1634 target++; 1635 } 1636 1637 memcpy(pathpos, &pathcomp, len); 1638 pathpos += len; 1639 pathlen += len; 1640 } 1641 1642 error = 0; 1643 while (*target) { 1644 /* ignore multiple '/' */ 1645 while (*target == '/') { 1646 target++; 1647 } 1648 if (!*target) 1649 break; 1650 1651 /* extract component name */ 1652 compnamelen = 0; 1653 compnamepos = target; 1654 while ((*target) && (*target != '/')) { 1655 target++; 1656 compnamelen++; 1657 } 1658 1659 /* just trunc if too long ?? (security issue) */ 1660 if (compnamelen >= 127) { 1661 error = ENAMETOOLONG; 1662 break; 1663 } 1664 1665 /* convert unix name to UDF name */ 1666 len = sizeof(struct pathcomp); 1667 memset(&pathcomp, 0, len); 1668 pathcomp.type = UDF_PATH_COMP_NAME; 1669 len = UDF_PATH_COMP_SIZE; 1670 1671 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1672 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1673 if ((compnamelen == 1) && (*compnamepos == '.')) 1674 pathcomp.type = UDF_PATH_COMP_CURDIR; 1675 1676 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1677 unix_to_udf_name( 1678 (char *) &pathcomp.ident, &pathcomp.l_ci, 1679 compnamepos, compnamelen, 1680 &udf_node->ump->logical_vol->desc_charset); 1681 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1682 } 1683 1684 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1685 error = ENAMETOOLONG; 1686 break; 1687 } 1688 1689 memcpy(pathpos, &pathcomp, len); 1690 pathpos += len; 1691 pathlen += len; 1692 } 1693 1694 if (error) { 1695 /* aparently too big */ 1696 free(pathbuf, M_UDFTEMP); 1697 return error; 1698 } 1699 1700 error = udf_grow_node(udf_node, pathlen); 1701 if (error) { 1702 /* failed to pregrow node */ 1703 free(pathbuf, M_UDFTEMP); 1704 return error; 1705 } 1706 1707 /* write out structure on the new file */ 1708 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1709 pathbuf, pathlen, 0, 1710 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1711 FSCRED, NULL, NULL); 1712 1713 /* return status of symlink contents writeout */ 1714 free(pathbuf, M_UDFTEMP); 1715 return error; 1716 } 1717 1718 1719 int 1720 udf_symlink(void *v) 1721 { 1722 struct vop_symlink_v3_args /* { 1723 struct vnode *a_dvp; 1724 struct vnode **a_vpp; 1725 struct componentname *a_cnp; 1726 struct vattr *a_vap; 1727 char *a_target; 1728 } */ *ap = v; 1729 struct vnode *dvp = ap->a_dvp; 1730 struct vnode **vpp = ap->a_vpp; 1731 struct vattr *vap = ap->a_vap; 1732 struct componentname *cnp = ap->a_cnp; 1733 struct udf_node *dir_node; 1734 struct udf_node *udf_node; 1735 int error; 1736 1737 DPRINTF(CALL, ("udf_symlink called\n")); 1738 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1739 error = udf_create_node(dvp, vpp, vap, cnp); 1740 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1741 if (!error) { 1742 dir_node = VTOI(dvp); 1743 udf_node = VTOI(*vpp); 1744 KASSERT(udf_node); 1745 error = udf_do_symlink(udf_node, ap->a_target); 1746 if (error) { 1747 /* remove node */ 1748 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1749 vrele(*vpp); 1750 *vpp = NULL; 1751 } 1752 } 1753 return error; 1754 } 1755 1756 /* --------------------------------------------------------------------- */ 1757 1758 static int 1759 udf_do_readlink(struct udf_node *udf_node, uint64_t filesize, 1760 uint8_t *targetbuf, int *length) 1761 { 1762 struct pathcomp pathcomp; 1763 uint8_t *pathbuf, *tmpname; 1764 uint8_t *pathpos, *targetpos; 1765 char *mntonname; 1766 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1767 int first, error; 1768 1769 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1770 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1771 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1772 memset(targetbuf, 0, PATH_MAX); 1773 1774 /* read contents of file in our temporary buffer */ 1775 error = vn_rdwr(UIO_READ, udf_node->vnode, 1776 pathbuf, filesize, 0, 1777 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1778 FSCRED, NULL, NULL); 1779 if (error) { 1780 /* failed to read in symlink contents */ 1781 free(pathbuf, M_UDFTEMP); 1782 free(tmpname, M_UDFTEMP); 1783 return error; 1784 } 1785 1786 /* convert to a unix path */ 1787 pathpos = pathbuf; 1788 pathlen = 0; 1789 targetpos = targetbuf; 1790 targetlen = PATH_MAX; 1791 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1792 mntonnamelen = strlen(mntonname); 1793 1794 error = 0; 1795 first = 1; 1796 while (filesize - pathlen >= UDF_PATH_COMP_SIZE) { 1797 len = UDF_PATH_COMP_SIZE; 1798 memcpy(&pathcomp, pathpos, len); 1799 l_ci = pathcomp.l_ci; 1800 switch (pathcomp.type) { 1801 case UDF_PATH_COMP_ROOT : 1802 /* XXX should check for l_ci; bugcompatible now */ 1803 if ((targetlen < 1) || !first) { 1804 error = EINVAL; 1805 break; 1806 } 1807 *targetpos++ = '/'; targetlen--; 1808 break; 1809 case UDF_PATH_COMP_MOUNTROOT : 1810 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1811 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1812 error = EINVAL; 1813 break; 1814 } 1815 memcpy(targetpos, mntonname, mntonnamelen); 1816 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1817 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1818 /* more follows, so must be directory */ 1819 *targetpos++ = '/'; targetlen--; 1820 } 1821 break; 1822 case UDF_PATH_COMP_PARENTDIR : 1823 /* XXX should check for l_ci; bugcompatible now */ 1824 if (targetlen < 3) { 1825 error = EINVAL; 1826 break; 1827 } 1828 *targetpos++ = '.'; targetlen--; 1829 *targetpos++ = '.'; targetlen--; 1830 *targetpos++ = '/'; targetlen--; 1831 break; 1832 case UDF_PATH_COMP_CURDIR : 1833 /* XXX should check for l_ci; bugcompatible now */ 1834 if (targetlen < 2) { 1835 error = EINVAL; 1836 break; 1837 } 1838 *targetpos++ = '.'; targetlen--; 1839 *targetpos++ = '/'; targetlen--; 1840 break; 1841 case UDF_PATH_COMP_NAME : 1842 if (l_ci == 0) { 1843 error = EINVAL; 1844 break; 1845 } 1846 memset(tmpname, 0, PATH_MAX); 1847 memcpy(&pathcomp, pathpos, len + l_ci); 1848 udf_to_unix_name(tmpname, MAXPATHLEN, 1849 pathcomp.ident, l_ci, 1850 &udf_node->ump->logical_vol->desc_charset); 1851 namelen = strlen(tmpname); 1852 if (targetlen < namelen + 1) { 1853 error = EINVAL; 1854 break; 1855 } 1856 memcpy(targetpos, tmpname, namelen); 1857 targetpos += namelen; targetlen -= namelen; 1858 if (filesize-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1859 /* more follows, so must be directory */ 1860 *targetpos++ = '/'; targetlen--; 1861 } 1862 break; 1863 default : 1864 error = EINVAL; 1865 break; 1866 } 1867 first = 0; 1868 if (error) 1869 break; 1870 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1871 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1872 1873 } 1874 /* all processed? */ 1875 if (filesize - pathlen > 0) 1876 error = EINVAL; 1877 1878 free(pathbuf, M_UDFTEMP); 1879 free(tmpname, M_UDFTEMP); 1880 1881 *length = PATH_MAX - targetlen; 1882 return error; 1883 } 1884 1885 1886 int 1887 udf_readlink(void *v) 1888 { 1889 struct vop_readlink_args /* { 1890 struct vnode *a_vp; 1891 struct uio *a_uio; 1892 kauth_cred_t a_cred; 1893 } */ *ap = v; 1894 struct vnode *vp = ap->a_vp; 1895 struct udf_node *udf_node = VTOI(vp); 1896 struct file_entry *fe = udf_node->fe; 1897 struct extfile_entry *efe = udf_node->efe; 1898 struct uio *uio = ap->a_uio; 1899 uint64_t filesize; 1900 uint8_t *targetbuf; 1901 int length; 1902 int error; 1903 1904 DPRINTF(CALL, ("udf_readlink called\n")); 1905 1906 if (fe) { 1907 filesize = udf_rw64(fe->inf_len); 1908 } else { 1909 assert(udf_node->efe); 1910 filesize = udf_rw64(efe->inf_len); 1911 } 1912 1913 /* claim temporary buffers for translation */ 1914 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1915 1916 error = udf_do_readlink(udf_node, filesize, targetbuf, &length); 1917 1918 /* uiomove() to destination */ 1919 if (!error) 1920 uiomove(targetbuf, length, uio); 1921 1922 free(targetbuf, M_UDFTEMP); 1923 return error; 1924 } 1925 1926 /* --------------------------------------------------------------------- */ 1927 1928 /* 1929 * udf_rename() moved to udf_rename.c 1930 */ 1931 1932 /* --------------------------------------------------------------------- */ 1933 1934 int 1935 udf_remove(void *v) 1936 { 1937 struct vop_remove_args /* { 1938 struct vnode *a_dvp; 1939 struct vnode *a_vp; 1940 struct componentname *a_cnp; 1941 } */ *ap = v; 1942 struct vnode *dvp = ap->a_dvp; 1943 struct vnode *vp = ap->a_vp; 1944 struct componentname *cnp = ap->a_cnp; 1945 struct udf_node *dir_node = VTOI(dvp); 1946 struct udf_node *udf_node = VTOI(vp); 1947 struct udf_mount *ump = dir_node->ump; 1948 int error; 1949 1950 DPRINTF(CALL, ("udf_remove called\n")); 1951 if (vp->v_type != VDIR) { 1952 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1953 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1954 } else { 1955 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1956 error = EPERM; 1957 } 1958 1959 if (error == 0) { 1960 VN_KNOTE(vp, NOTE_DELETE); 1961 VN_KNOTE(dvp, NOTE_WRITE); 1962 } 1963 1964 if (dvp == vp) 1965 vrele(vp); 1966 else 1967 vput(vp); 1968 vput(dvp); 1969 1970 return error; 1971 } 1972 1973 /* --------------------------------------------------------------------- */ 1974 1975 int 1976 udf_rmdir(void *v) 1977 { 1978 struct vop_rmdir_args /* { 1979 struct vnode *a_dvp; 1980 struct vnode *a_vp; 1981 struct componentname *a_cnp; 1982 } */ *ap = v; 1983 struct vnode *vp = ap->a_vp; 1984 struct vnode *dvp = ap->a_dvp; 1985 struct componentname *cnp = ap->a_cnp; 1986 struct udf_node *dir_node = VTOI(dvp); 1987 struct udf_node *udf_node = VTOI(vp); 1988 struct udf_mount *ump = dir_node->ump; 1989 int error, isempty; 1990 1991 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1992 1993 /* don't allow '.' to be deleted */ 1994 if (dir_node == udf_node) { 1995 vrele(dvp); 1996 vput(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(dvp); 2014 vput(vp); 2015 return ENOTEMPTY; 2016 } 2017 2018 /* detach the node from the directory, udf_node is an empty dir here */ 2019 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2020 if (error == 0) { 2021 cache_purge(vp); 2022 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2023 /* 2024 * Bug alert: we need to remove '..' from the detaching 2025 * udf_node so further lookups of this are not possible. This 2026 * prevents a process in a deleted directory from going to its 2027 * deleted parent. Since `udf_node' is garanteed to be empty 2028 * here, trunc it so no fids are there. 2029 */ 2030 dirhash_purge(&udf_node->dir_hash); 2031 udf_shrink_node(udf_node, 0); 2032 VN_KNOTE(vp, NOTE_DELETE); 2033 } 2034 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 2035 2036 /* unput the nodes and exit */ 2037 vput(dvp); 2038 vput(vp); 2039 2040 return error; 2041 } 2042 2043 /* --------------------------------------------------------------------- */ 2044 2045 int 2046 udf_fsync(void *v) 2047 { 2048 struct vop_fsync_args /* { 2049 struct vnode *a_vp; 2050 kauth_cred_t a_cred; 2051 int a_flags; 2052 off_t offlo; 2053 off_t offhi; 2054 struct proc *a_p; 2055 } */ *ap = v; 2056 struct vnode *vp = ap->a_vp; 2057 struct udf_node *udf_node = VTOI(vp); 2058 int error, flags, wait; 2059 2060 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2061 udf_node, 2062 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2063 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2064 2065 /* flush data and wait for it when requested */ 2066 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2067 error = vflushbuf(vp, ap->a_flags); 2068 if (error) 2069 return error; 2070 2071 if (udf_node == NULL) { 2072 printf("udf_fsync() called on NULL udf_node!\n"); 2073 return 0; 2074 } 2075 if (vp->v_tag != VT_UDF) { 2076 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2077 return 0; 2078 } 2079 2080 /* set our times */ 2081 udf_itimes(udf_node, NULL, NULL, NULL); 2082 2083 /* if called when mounted readonly, never write back */ 2084 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2085 return 0; 2086 2087 /* if only data is requested, return */ 2088 if (ap->a_flags & FSYNC_DATAONLY) 2089 return 0; 2090 2091 /* check if the node is dirty 'enough'*/ 2092 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2093 if (flags == 0) 2094 return 0; 2095 2096 /* if we don't have to wait, check for IO pending */ 2097 if (!wait) { 2098 if (vp->v_numoutput > 0) { 2099 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2100 return 0; 2101 } 2102 if (udf_node->outstanding_bufs > 0) { 2103 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2104 return 0; 2105 } 2106 if (udf_node->outstanding_nodedscr > 0) { 2107 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2108 return 0; 2109 } 2110 } 2111 2112 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2113 if (wait) { 2114 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2115 mutex_enter(vp->v_interlock); 2116 while (vp->v_numoutput) { 2117 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2118 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2119 } 2120 mutex_exit(vp->v_interlock); 2121 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2122 } 2123 2124 /* write out node and wait for it if requested */ 2125 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2126 error = udf_writeout_node(udf_node, wait); 2127 if (error) 2128 return error; 2129 2130 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2131 2132 return 0; 2133 } 2134 2135 /* --------------------------------------------------------------------- */ 2136 2137 int 2138 udf_advlock(void *v) 2139 { 2140 struct vop_advlock_args /* { 2141 struct vnode *a_vp; 2142 void *a_id; 2143 int a_op; 2144 struct flock *a_fl; 2145 int a_flags; 2146 } */ *ap = v; 2147 struct vnode *vp = ap->a_vp; 2148 struct udf_node *udf_node = VTOI(vp); 2149 struct file_entry *fe; 2150 struct extfile_entry *efe; 2151 uint64_t file_size; 2152 2153 DPRINTF(LOCKING, ("udf_advlock called\n")); 2154 2155 /* get directory filesize */ 2156 if (udf_node->fe) { 2157 fe = udf_node->fe; 2158 file_size = udf_rw64(fe->inf_len); 2159 } else { 2160 assert(udf_node->efe); 2161 efe = udf_node->efe; 2162 file_size = udf_rw64(efe->inf_len); 2163 } 2164 2165 return lf_advlock(ap, &udf_node->lockf, file_size); 2166 } 2167 2168 /* --------------------------------------------------------------------- */ 2169 2170 /* Global vfs vnode data structures for udfs */ 2171 int (**udf_vnodeop_p)(void *); 2172 2173 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2174 { &vop_default_desc, vn_default_error }, 2175 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2176 { &vop_create_desc, udf_create }, /* create */ 2177 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2178 { &vop_open_desc, udf_open }, /* open */ 2179 { &vop_close_desc, udf_close }, /* close */ 2180 { &vop_access_desc, udf_access }, /* access */ 2181 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2182 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2183 { &vop_read_desc, udf_read }, /* read */ 2184 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2185 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 2186 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 2187 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2188 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2189 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2190 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2191 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2192 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2193 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2194 { &vop_seek_desc, genfs_seek }, /* seek */ 2195 { &vop_remove_desc, udf_remove }, /* remove */ 2196 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2197 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2198 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2199 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2200 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2201 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2202 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2203 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2204 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2205 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2206 { &vop_lock_desc, genfs_lock }, /* lock */ 2207 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2208 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2209 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2210 /* { &vop_print_desc, udf_print }, */ /* print */ 2211 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2212 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2213 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2214 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2215 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2216 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2217 { NULL, NULL } 2218 }; 2219 2220 2221 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2222 &udf_vnodeop_p, udf_vnodeop_entries 2223 }; 2224
Indexes created Thu Oct 02 14:10:14 GMT 2025