udf_vnops.c revision 1.90
1 /* $NetBSD: udf_vnops.c,v 1.90 2014/02/07 15:29:22 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 2006, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Generic parts are derived from software contributed to The NetBSD Foundation 28 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 29 * 2005 program. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __KERNEL_RCSID(0, "$NetBSD: udf_vnops.c,v 1.90 2014/02/07 15:29:22 hannken Exp $"); 36 #endif /* not lint */ 37 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 43 #include <sys/kernel.h> 44 #include <sys/file.h> /* define FWRITE ... */ 45 #include <sys/stat.h> 46 #include <sys/buf.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/lockf.h> 54 #include <sys/kauth.h> 55 56 #include <miscfs/genfs/genfs.h> 57 #include <uvm/uvm_extern.h> 58 59 #include <fs/udf/ecma167-udf.h> 60 #include <fs/udf/udf_mount.h> 61 #include <sys/dirhash.h> 62 63 #include "udf.h" 64 #include "udf_subr.h" 65 #include "udf_bswap.h" 66 67 68 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data) 69 70 71 /* externs */ 72 extern int prtactive; 73 74 /* implementations of vnode functions; table follows at end */ 75 /* --------------------------------------------------------------------- */ 76 77 int 78 udf_inactive(void *v) 79 { 80 struct vop_inactive_args /* { 81 struct vnode *a_vp; 82 bool *a_recycle; 83 } */ *ap = v; 84 struct vnode *vp = ap->a_vp; 85 struct udf_node *udf_node = VTOI(vp); 86 int refcnt; 87 88 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 89 90 if (udf_node == NULL) { 91 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 92 VOP_UNLOCK(vp); 93 return 0; 94 } 95 96 /* 97 * Optionally flush metadata to disc. If the file has not been 98 * referenced anymore in a directory we ought to free up the resources 99 * on disc if applicable. 100 */ 101 if (udf_node->fe) { 102 refcnt = udf_rw16(udf_node->fe->link_cnt); 103 } else { 104 assert(udf_node->efe); 105 refcnt = udf_rw16(udf_node->efe->link_cnt); 106 } 107 108 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 109 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 110 /* system nodes are not writen out on inactive, so flush */ 111 udf_node->i_flags = 0; 112 } 113 114 *ap->a_recycle = false; 115 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 116 /* remove this file's allocation */ 117 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 118 *ap->a_recycle = true; 119 udf_delete_node(udf_node); 120 VOP_UNLOCK(vp); 121 return 0; 122 } 123 124 /* write out its node */ 125 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 126 udf_update(vp, NULL, NULL, NULL, 0); 127 VOP_UNLOCK(vp); 128 129 return 0; 130 } 131 132 /* --------------------------------------------------------------------- */ 133 134 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 135 136 int 137 udf_reclaim(void *v) 138 { 139 struct vop_reclaim_args /* { 140 struct vnode *a_vp; 141 } */ *ap = v; 142 struct vnode *vp = ap->a_vp; 143 struct udf_node *udf_node = VTOI(vp); 144 145 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 146 if (prtactive && vp->v_usecount > 1) 147 vprint("udf_reclaim(): pushing active", vp); 148 149 if (udf_node == NULL) { 150 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 151 return 0; 152 } 153 154 /* update note for closure */ 155 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 156 157 /* async check to see if all node descriptors are written out */ 158 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 159 vprint("udf_reclaim(): waiting for writeout\n", vp); 160 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 161 } 162 163 /* dispose all node knowledge */ 164 udf_dispose_node(udf_node); 165 166 return 0; 167 } 168 169 /* --------------------------------------------------------------------- */ 170 171 int 172 udf_read(void *v) 173 { 174 struct vop_read_args /* { 175 struct vnode *a_vp; 176 struct uio *a_uio; 177 int a_ioflag; 178 kauth_cred_t a_cred; 179 } */ *ap = v; 180 struct vnode *vp = ap->a_vp; 181 struct uio *uio = ap->a_uio; 182 int ioflag = ap->a_ioflag; 183 int advice = IO_ADV_DECODE(ap->a_ioflag); 184 struct uvm_object *uobj; 185 struct udf_node *udf_node = VTOI(vp); 186 struct file_entry *fe; 187 struct extfile_entry *efe; 188 uint64_t file_size; 189 vsize_t len; 190 int error; 191 192 /* 193 * XXX reading from extended attributes not yet implemented. FreeBSD 194 * has it in mind to forward the IO_EXT read call to the 195 * VOP_READEXTATTR(). 196 */ 197 198 DPRINTF(READ, ("udf_read called\n")); 199 200 /* can this happen? some filingsystems have this check */ 201 if (uio->uio_offset < 0) 202 return EINVAL; 203 if (uio->uio_resid == 0) 204 return 0; 205 206 /* protect against rogue programs reading raw directories and links */ 207 if ((ioflag & IO_ALTSEMANTICS) == 0) { 208 if (vp->v_type == VDIR) 209 return EISDIR; 210 /* all but regular files just give EINVAL */ 211 if (vp->v_type != VREG) 212 return EINVAL; 213 } 214 215 assert(udf_node); 216 assert(udf_node->fe || udf_node->efe); 217 218 /* get file/directory filesize */ 219 if (udf_node->fe) { 220 fe = udf_node->fe; 221 file_size = udf_rw64(fe->inf_len); 222 } else { 223 assert(udf_node->efe); 224 efe = udf_node->efe; 225 file_size = udf_rw64(efe->inf_len); 226 } 227 228 /* read contents using buffercache */ 229 uobj = &vp->v_uobj; 230 error = 0; 231 while (uio->uio_resid > 0) { 232 /* reached end? */ 233 if (file_size <= uio->uio_offset) 234 break; 235 236 /* maximise length to file extremity */ 237 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 238 if (len == 0) 239 break; 240 241 /* ubc, here we come, prepare to trap */ 242 error = ubc_uiomove(uobj, uio, len, advice, 243 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 244 if (error) 245 break; 246 } 247 248 /* note access time unless not requested */ 249 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 250 udf_node->i_flags |= IN_ACCESS; 251 if ((ioflag & IO_SYNC) == IO_SYNC) 252 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 253 } 254 255 return error; 256 } 257 258 /* --------------------------------------------------------------------- */ 259 260 int 261 udf_write(void *v) 262 { 263 struct vop_write_args /* { 264 struct vnode *a_vp; 265 struct uio *a_uio; 266 int a_ioflag; 267 kauth_cred_t a_cred; 268 } */ *ap = v; 269 struct vnode *vp = ap->a_vp; 270 struct uio *uio = ap->a_uio; 271 int ioflag = ap->a_ioflag; 272 kauth_cred_t cred = ap->a_cred; 273 int advice = IO_ADV_DECODE(ap->a_ioflag); 274 struct uvm_object *uobj; 275 struct udf_node *udf_node = VTOI(vp); 276 struct file_entry *fe; 277 struct extfile_entry *efe; 278 uint64_t file_size, old_size, old_offset; 279 vsize_t len; 280 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 281 int error; 282 int resid, extended; 283 284 /* 285 * XXX writing to extended attributes not yet implemented. FreeBSD has 286 * it in mind to forward the IO_EXT read call to the 287 * VOP_READEXTATTR(). 288 */ 289 290 DPRINTF(WRITE, ("udf_write called\n")); 291 292 /* can this happen? some filingsystems have this check */ 293 if (uio->uio_offset < 0) 294 return EINVAL; 295 if (uio->uio_resid == 0) 296 return 0; 297 298 /* protect against rogue programs writing raw directories or links */ 299 if ((ioflag & IO_ALTSEMANTICS) == 0) { 300 if (vp->v_type == VDIR) 301 return EISDIR; 302 /* all but regular files just give EINVAL for now */ 303 if (vp->v_type != VREG) 304 return EINVAL; 305 } 306 307 assert(udf_node); 308 assert(udf_node->fe || udf_node->efe); 309 310 /* get file/directory filesize */ 311 if (udf_node->fe) { 312 fe = udf_node->fe; 313 file_size = udf_rw64(fe->inf_len); 314 } else { 315 assert(udf_node->efe); 316 efe = udf_node->efe; 317 file_size = udf_rw64(efe->inf_len); 318 } 319 old_size = file_size; 320 321 /* if explicitly asked to append, uio_offset can be wrong? */ 322 if (ioflag & IO_APPEND) 323 uio->uio_offset = file_size; 324 325 extended = (uio->uio_offset + uio->uio_resid > file_size); 326 if (extended) { 327 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 328 file_size, uio->uio_offset + uio->uio_resid)); 329 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 330 if (error) 331 return error; 332 file_size = uio->uio_offset + uio->uio_resid; 333 } 334 335 /* write contents using buffercache */ 336 uobj = &vp->v_uobj; 337 resid = uio->uio_resid; 338 error = 0; 339 340 uvm_vnp_setwritesize(vp, file_size); 341 old_offset = uio->uio_offset; 342 while (uio->uio_resid > 0) { 343 /* maximise length to file extremity */ 344 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 345 if (len == 0) 346 break; 347 348 genfs_node_wrlock(vp); 349 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 350 genfs_node_unlock(vp); 351 if (error) 352 break; 353 354 /* ubc, here we come, prepare to trap */ 355 error = ubc_uiomove(uobj, uio, len, advice, 356 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 357 if (error) 358 break; 359 360 /* 361 * flush what we just wrote if necessary. 362 * XXXUBC simplistic async flushing. 363 * 364 * Directories are excluded since its file data that we want 365 * to purge. 366 */ 367 if ((vp->v_type != VDIR) && 368 (old_offset >> 16 != uio->uio_offset >> 16)) { 369 mutex_enter(vp->v_interlock); 370 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 371 (uio->uio_offset >> 16) << 16, 372 PGO_CLEANIT | PGO_LAZY); 373 old_offset = uio->uio_offset; 374 } 375 } 376 uvm_vnp_setsize(vp, file_size); 377 378 /* mark node changed and request update */ 379 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 380 if (vp->v_mount->mnt_flag & MNT_RELATIME) 381 udf_node->i_flags |= IN_ACCESS; 382 383 /* 384 * XXX TODO FFS has code here to reset setuid & setgid when we're not 385 * the superuser as a precaution against tampering. 386 */ 387 388 /* if we wrote a thing, note write action on vnode */ 389 if (resid > uio->uio_resid) 390 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 391 392 if (error) { 393 /* bring back file size to its former size */ 394 /* take notice of its errors? */ 395 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 396 397 /* roll back uio */ 398 uio->uio_offset -= resid - uio->uio_resid; 399 uio->uio_resid = resid; 400 } else { 401 /* if we write and we're synchronous, update node */ 402 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 403 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 404 } 405 406 return error; 407 } 408 409 410 /* --------------------------------------------------------------------- */ 411 412 /* 413 * `Special' bmap functionality that translates all incomming requests to 414 * translate to vop_strategy() calls with the same blocknumbers effectively 415 * not translating at all. 416 */ 417 418 int 419 udf_trivial_bmap(void *v) 420 { 421 struct vop_bmap_args /* { 422 struct vnode *a_vp; 423 daddr_t a_bn; 424 struct vnode **a_vpp; 425 daddr_t *a_bnp; 426 int *a_runp; 427 } */ *ap = v; 428 struct vnode *vp = ap->a_vp; /* our node */ 429 struct vnode **vpp = ap->a_vpp; /* return node */ 430 daddr_t *bnp = ap->a_bnp; /* translated */ 431 daddr_t bn = ap->a_bn; /* origional */ 432 int *runp = ap->a_runp; 433 struct udf_node *udf_node = VTOI(vp); 434 uint32_t lb_size; 435 436 /* get logical block size */ 437 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 438 439 /* could return `-1' to indicate holes/zeros */ 440 /* translate 1:1 */ 441 *bnp = bn; 442 443 /* set the vnode to read the data from with strategy on itself */ 444 if (vpp) 445 *vpp = vp; 446 447 /* set runlength of maximum block size */ 448 if (runp) 449 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 450 451 /* return success */ 452 return 0; 453 } 454 455 /* --------------------------------------------------------------------- */ 456 457 int 458 udf_vfsstrategy(void *v) 459 { 460 struct vop_strategy_args /* { 461 struct vnode *a_vp; 462 struct buf *a_bp; 463 } */ *ap = v; 464 struct vnode *vp = ap->a_vp; 465 struct buf *bp = ap->a_bp; 466 struct udf_node *udf_node = VTOI(vp); 467 uint32_t lb_size, sectors; 468 469 DPRINTF(STRATEGY, ("udf_strategy called\n")); 470 471 /* check if we ought to be here */ 472 if (vp->v_type == VBLK || vp->v_type == VCHR) 473 panic("udf_strategy: spec"); 474 475 /* only filebuffers ought to be read/write by this, no descriptors */ 476 assert(bp->b_blkno >= 0); 477 478 /* get sector size */ 479 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 480 481 /* calculate length to fetch/store in sectors */ 482 sectors = bp->b_bcount / lb_size; 483 assert(bp->b_bcount > 0); 484 485 /* NEVER assume later that this buffer is already translated */ 486 /* bp->b_lblkno = bp->b_blkno; */ 487 488 /* check assertions: we OUGHT to always get multiples of this */ 489 assert(sectors * lb_size == bp->b_bcount); 490 491 /* issue buffer */ 492 if (bp->b_flags & B_READ) { 493 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 494 ", for %d sectors\n", 495 vp, bp, bp->b_blkno, sectors)); 496 497 /* read buffer from the udf_node, translate vtop on the way*/ 498 udf_read_filebuf(udf_node, bp); 499 } else { 500 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 501 ", for %d sectors\n", 502 vp, bp, bp->b_blkno, sectors)); 503 504 /* write buffer to the udf_node, translate vtop on the way*/ 505 udf_write_filebuf(udf_node, bp); 506 } 507 508 return bp->b_error; 509 } 510 511 /* --------------------------------------------------------------------- */ 512 513 int 514 udf_readdir(void *v) 515 { 516 struct vop_readdir_args /* { 517 struct vnode *a_vp; 518 struct uio *a_uio; 519 kauth_cred_t a_cred; 520 int *a_eofflag; 521 off_t **a_cookies; 522 int *a_ncookies; 523 } */ *ap = v; 524 struct uio *uio = ap->a_uio; 525 struct vnode *vp = ap->a_vp; 526 struct udf_node *udf_node = VTOI(vp); 527 struct file_entry *fe; 528 struct extfile_entry *efe; 529 struct fileid_desc *fid; 530 struct dirent *dirent; 531 uint64_t file_size, diroffset, transoffset; 532 uint32_t lb_size; 533 int error; 534 535 DPRINTF(READDIR, ("udf_readdir called\n")); 536 537 /* This operation only makes sense on directory nodes. */ 538 if (vp->v_type != VDIR) 539 return ENOTDIR; 540 541 /* get directory filesize */ 542 if (udf_node->fe) { 543 fe = udf_node->fe; 544 file_size = udf_rw64(fe->inf_len); 545 } else { 546 assert(udf_node->efe); 547 efe = udf_node->efe; 548 file_size = udf_rw64(efe->inf_len); 549 } 550 551 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 552 553 /* 554 * Add `.' pseudo entry if at offset zero since its not in the fid 555 * stream 556 */ 557 if (uio->uio_offset == 0) { 558 DPRINTF(READDIR, ("\t'.' inserted\n")); 559 strcpy(dirent->d_name, "."); 560 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 561 dirent->d_type = DT_DIR; 562 dirent->d_namlen = strlen(dirent->d_name); 563 dirent->d_reclen = _DIRENT_SIZE(dirent); 564 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 565 566 /* mark with magic value that we have done the dummy */ 567 uio->uio_offset = UDF_DIRCOOKIE_DOT; 568 } 569 570 /* we are called just as long as we keep on pushing data in */ 571 error = 0; 572 if (uio->uio_offset < file_size) { 573 /* allocate temporary space for fid */ 574 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 575 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 576 577 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 578 uio->uio_offset = 0; 579 580 diroffset = uio->uio_offset; 581 transoffset = diroffset; 582 while (diroffset < file_size) { 583 DPRINTF(READDIR, ("\tread in fid stream\n")); 584 /* transfer a new fid/dirent */ 585 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 586 DPRINTFIF(READDIR, error, ("read error in read fid " 587 "stream : %d\n", error)); 588 if (error) 589 break; 590 591 /* 592 * If there isn't enough space in the uio to return a 593 * whole dirent, break off read 594 */ 595 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 596 break; 597 598 /* remember the last entry we transfered */ 599 transoffset = diroffset; 600 601 /* skip deleted entries */ 602 if (fid->file_char & UDF_FILE_CHAR_DEL) 603 continue; 604 605 /* skip not visible files */ 606 if (fid->file_char & UDF_FILE_CHAR_VIS) 607 continue; 608 609 /* copy dirent to the caller */ 610 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 611 dirent->d_name, dirent->d_type)); 612 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 613 } 614 615 /* pass on last transfered offset */ 616 uio->uio_offset = transoffset; 617 free(fid, M_UDFTEMP); 618 } 619 620 if (ap->a_eofflag) 621 *ap->a_eofflag = (uio->uio_offset >= file_size); 622 623 #ifdef DEBUG 624 if (udf_verbose & UDF_DEBUG_READDIR) { 625 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 626 if (ap->a_eofflag) 627 printf("returning EOF ? %d\n", *ap->a_eofflag); 628 if (error) 629 printf("readdir returning error %d\n", error); 630 } 631 #endif 632 633 free(dirent, M_UDFTEMP); 634 return error; 635 } 636 637 /* --------------------------------------------------------------------- */ 638 639 int 640 udf_lookup(void *v) 641 { 642 struct vop_lookup_v2_args /* { 643 struct vnode *a_dvp; 644 struct vnode **a_vpp; 645 struct componentname *a_cnp; 646 } */ *ap = v; 647 struct vnode *dvp = ap->a_dvp; 648 struct vnode **vpp = ap->a_vpp; 649 struct componentname *cnp = ap->a_cnp; 650 struct udf_node *dir_node, *res_node; 651 struct udf_mount *ump; 652 struct long_ad icb_loc; 653 mode_t mode; 654 uid_t d_uid; 655 gid_t d_gid; 656 const char *name; 657 int namelen, nameiop, islastcn, mounted_ro; 658 int error, found; 659 660 dir_node = VTOI(dvp); 661 ump = dir_node->ump; 662 *vpp = NULL; 663 664 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 665 cnp->cn_nameptr)); 666 667 /* simplify/clarification flags */ 668 nameiop = cnp->cn_nameiop; 669 islastcn = cnp->cn_flags & ISLASTCN; 670 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 671 672 /* check exec/dirread permissions first */ 673 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 674 if (error) 675 return error; 676 677 DPRINTF(LOOKUP, ("\taccess ok\n")); 678 679 /* 680 * If requesting a modify on the last path element on a read-only 681 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 682 */ 683 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 684 return EROFS; 685 686 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 687 cnp->cn_nameptr)); 688 /* look in the namecache */ 689 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 690 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 691 return *vpp == NULLVP ? ENOENT : 0; 692 } 693 694 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 695 696 /* 697 * Obviously, the file is not (anymore) in the namecache, we have to 698 * search for it. There are three basic cases: '.', '..' and others. 699 * 700 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 701 */ 702 error = 0; 703 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 704 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 705 /* special case 1 '.' */ 706 if (islastcn && cnp->cn_nameiop == RENAME) { 707 error = EISDIR; 708 goto out; 709 } 710 vref(dvp); 711 *vpp = dvp; 712 /* done */ 713 goto done; 714 } else if (cnp->cn_flags & ISDOTDOT) { 715 /* special case 2 '..' */ 716 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 717 718 if (islastcn && cnp->cn_nameiop == RENAME) { 719 error = EINVAL; 720 goto out; 721 } 722 723 /* get our node */ 724 name = ".."; 725 namelen = 2; 726 error = udf_lookup_name_in_dir(dvp, name, namelen, 727 &icb_loc, &found); 728 if (error) 729 goto out; 730 if (!found) 731 error = ENOENT; 732 733 /* first unlock parent */ 734 VOP_UNLOCK(dvp); 735 736 if (error == 0) { 737 DPRINTF(LOOKUP, ("\tfound '..'\n")); 738 /* try to create/reuse the node */ 739 error = udf_get_node(ump, &icb_loc, &res_node); 740 741 if (!error) { 742 DPRINTF(LOOKUP, 743 ("\tnode retrieved/created OK\n")); 744 *vpp = res_node->vnode; 745 } 746 } 747 748 /* try to relock parent */ 749 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 750 goto out; 751 } 752 753 /* all other files */ 754 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 755 756 /* lookup filename in the directory; location icb_loc */ 757 name = cnp->cn_nameptr; 758 namelen = cnp->cn_namelen; 759 error = udf_lookup_name_in_dir(dvp, name, namelen, 760 &icb_loc, &found); 761 if (error) 762 goto out; 763 if (!found) { 764 DPRINTF(LOOKUP, ("\tNOT found\n")); 765 /* 766 * The entry was not found in the directory. This is 767 * valid if we are creating or renaming an entry and 768 * are working on the last component of the path name. 769 */ 770 if (islastcn && (cnp->cn_nameiop == CREATE || 771 cnp->cn_nameiop == RENAME)) { 772 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 773 if (error) { 774 goto out; 775 } 776 error = EJUSTRETURN; 777 } else { 778 error = ENOENT; 779 } 780 /* done */ 781 goto done; 782 } 783 784 /* 785 * XXX NOTE tmpfs has a test here that tests that intermediate 786 * components i.e. not the last one ought to be either a directory or 787 * a link. It seems to function well without this code. 788 */ 789 790 /* try to create/reuse the node */ 791 error = udf_get_node(ump, &icb_loc, &res_node); 792 if (error) 793 goto out; 794 795 /* check permissions */ 796 if (islastcn && (cnp->cn_nameiop == DELETE || 797 cnp->cn_nameiop == RENAME) ) { 798 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 799 if (error) { 800 vput(res_node->vnode); 801 goto out; 802 } 803 804 /* 805 * Check if the directory has its sticky bit set. If so, ask 806 * for clearance since only the owner of a file or directory 807 * can remove/rename from taht directory. 808 */ 809 mode = udf_getaccessmode(dir_node); 810 if ((mode & S_ISTXT) != 0) { 811 udf_getownership(dir_node, &d_uid, &d_gid); 812 error = kauth_authorize_vnode(cnp->cn_cred, 813 KAUTH_VNODE_DELETE, res_node->vnode, 814 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 815 d_uid, d_uid)); 816 if (error) { 817 error = EPERM; 818 vput(res_node->vnode); 819 goto out; 820 } 821 } 822 } 823 824 *vpp = res_node->vnode; 825 826 done: 827 /* 828 * Store result in the cache if requested. If we are creating a file, 829 * the file might not be found and thus putting it into the namecache 830 * might be seen as negative caching. 831 */ 832 if (nameiop != CREATE) 833 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 834 cnp->cn_flags); 835 836 out: 837 if (error == 0 && *vpp != dvp) 838 VOP_UNLOCK(*vpp); 839 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 840 841 return error; 842 } 843 844 /* --------------------------------------------------------------------- */ 845 846 int 847 udf_getattr(void *v) 848 { 849 struct vop_getattr_args /* { 850 struct vnode *a_vp; 851 struct vattr *a_vap; 852 kauth_cred_t a_cred; 853 struct lwp *a_l; 854 } */ *ap = v; 855 struct vnode *vp = ap->a_vp; 856 struct udf_node *udf_node = VTOI(vp); 857 struct udf_mount *ump = udf_node->ump; 858 struct file_entry *fe = udf_node->fe; 859 struct extfile_entry *efe = udf_node->efe; 860 struct filetimes_extattr_entry *ft_extattr; 861 struct device_extattr_entry *devattr; 862 struct vattr *vap = ap->a_vap; 863 struct timestamp *atime, *mtime, *attrtime, *creatime; 864 uint64_t filesize, blkssize; 865 uint32_t nlink; 866 uint32_t offset, a_l; 867 uint8_t *filedata; 868 uid_t uid; 869 gid_t gid; 870 int error; 871 872 DPRINTF(CALL, ("udf_getattr called\n")); 873 874 /* update times before we returning values */ 875 udf_itimes(udf_node, NULL, NULL, NULL); 876 877 /* get descriptor information */ 878 if (fe) { 879 nlink = udf_rw16(fe->link_cnt); 880 uid = (uid_t)udf_rw32(fe->uid); 881 gid = (gid_t)udf_rw32(fe->gid); 882 filesize = udf_rw64(fe->inf_len); 883 blkssize = udf_rw64(fe->logblks_rec); 884 atime = &fe->atime; 885 mtime = &fe->mtime; 886 attrtime = &fe->attrtime; 887 filedata = fe->data; 888 889 /* initial guess */ 890 creatime = mtime; 891 892 /* check our extended attribute if present */ 893 error = udf_extattr_search_intern(udf_node, 894 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 895 if (!error) { 896 ft_extattr = (struct filetimes_extattr_entry *) 897 (filedata + offset); 898 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 899 creatime = &ft_extattr->times[0]; 900 } 901 } else { 902 assert(udf_node->efe); 903 nlink = udf_rw16(efe->link_cnt); 904 uid = (uid_t)udf_rw32(efe->uid); 905 gid = (gid_t)udf_rw32(efe->gid); 906 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 907 blkssize = udf_rw64(efe->logblks_rec); 908 atime = &efe->atime; 909 mtime = &efe->mtime; 910 attrtime = &efe->attrtime; 911 creatime = &efe->ctime; 912 filedata = efe->data; 913 } 914 915 /* do the uid/gid translation game */ 916 if (uid == (uid_t) -1) 917 uid = ump->mount_args.anon_uid; 918 if (gid == (gid_t) -1) 919 gid = ump->mount_args.anon_gid; 920 921 /* fill in struct vattr with values from the node */ 922 vattr_null(vap); 923 vap->va_type = vp->v_type; 924 vap->va_mode = udf_getaccessmode(udf_node); 925 vap->va_nlink = nlink; 926 vap->va_uid = uid; 927 vap->va_gid = gid; 928 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 929 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 930 vap->va_size = filesize; 931 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 932 933 /* 934 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 935 * 1 to the link count if its a directory we're requested attributes 936 * of. 937 */ 938 if (vap->va_type == VDIR) 939 vap->va_nlink++; 940 941 /* access times */ 942 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 943 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 944 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 945 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 946 947 vap->va_gen = 1; /* no multiple generations yes (!?) */ 948 vap->va_flags = 0; /* no flags */ 949 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 950 vap->va_filerev = 1; /* TODO file revision numbers? */ 951 vap->va_vaflags = 0; 952 /* TODO get vaflags from the extended attributes? */ 953 954 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 955 error = udf_extattr_search_intern(udf_node, 956 UDF_DEVICESPEC_ATTR_NO, "", 957 &offset, &a_l); 958 /* if error, deny access */ 959 if (error || (filedata == NULL)) { 960 vap->va_mode = 0; /* or v_type = VNON? */ 961 } else { 962 devattr = (struct device_extattr_entry *) 963 filedata + offset; 964 vap->va_rdev = makedev( 965 udf_rw32(devattr->major), 966 udf_rw32(devattr->minor) 967 ); 968 /* TODO we could check the implementator */ 969 } 970 } 971 972 return 0; 973 } 974 975 /* --------------------------------------------------------------------- */ 976 977 static int 978 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 979 kauth_cred_t cred) 980 { 981 struct udf_node *udf_node = VTOI(vp); 982 uid_t uid; 983 gid_t gid; 984 int error; 985 986 #ifdef notyet 987 /* TODO get vaflags from the extended attributes? */ 988 /* Immutable or append-only files cannot be modified, either. */ 989 if (udf_node->flags & (IMMUTABLE | APPEND)) 990 return EPERM; 991 #endif 992 993 if (vp->v_mount->mnt_flag & MNT_RDONLY) 994 return EROFS; 995 996 /* retrieve old values */ 997 udf_getownership(udf_node, &uid, &gid); 998 999 /* only one could be specified */ 1000 if (new_uid == VNOVAL) 1001 new_uid = uid; 1002 if (new_gid == VNOVAL) 1003 new_gid = gid; 1004 1005 /* check if we can fit it in an 32 bits */ 1006 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1007 return EINVAL; 1008 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1009 return EINVAL; 1010 1011 /* check permissions */ 1012 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1013 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1014 if (error) 1015 return (error); 1016 1017 /* change the ownership */ 1018 udf_setownership(udf_node, new_uid, new_gid); 1019 1020 /* mark node changed */ 1021 udf_node->i_flags |= IN_CHANGE; 1022 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1023 udf_node->i_flags |= IN_ACCESS; 1024 1025 return 0; 1026 } 1027 1028 1029 static int 1030 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1031 { 1032 struct udf_node *udf_node = VTOI(vp); 1033 uid_t uid; 1034 gid_t gid; 1035 int error; 1036 1037 #ifdef notyet 1038 /* TODO get vaflags from the extended attributes? */ 1039 /* Immutable or append-only files cannot be modified, either. */ 1040 if (udf_node->flags & (IMMUTABLE | APPEND)) 1041 return EPERM; 1042 #endif 1043 1044 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1045 return EROFS; 1046 1047 /* retrieve uid/gid values */ 1048 udf_getownership(udf_node, &uid, &gid); 1049 1050 /* check permissions */ 1051 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1052 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1053 if (error) 1054 return (error); 1055 1056 /* change mode */ 1057 udf_setaccessmode(udf_node, mode); 1058 1059 /* mark node changed */ 1060 udf_node->i_flags |= IN_CHANGE; 1061 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1062 udf_node->i_flags |= IN_ACCESS; 1063 1064 return 0; 1065 } 1066 1067 1068 /* exported */ 1069 int 1070 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1071 { 1072 struct udf_node *udf_node = VTOI(vp); 1073 int error, extended; 1074 1075 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1076 return EROFS; 1077 1078 /* Decide whether this is a valid operation based on the file type. */ 1079 switch (vp->v_type) { 1080 case VDIR: 1081 return EISDIR; 1082 case VREG: 1083 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1084 return EROFS; 1085 break; 1086 case VBLK: 1087 /* FALLTHROUGH */ 1088 case VCHR: 1089 /* FALLTHROUGH */ 1090 case VFIFO: 1091 /* Allow modifications of special files even if in the file 1092 * system is mounted read-only (we are not modifying the 1093 * files themselves, but the objects they represent). */ 1094 return 0; 1095 default: 1096 /* Anything else is unsupported. */ 1097 return EOPNOTSUPP; 1098 } 1099 1100 #if notyet 1101 /* TODO get vaflags from the extended attributes? */ 1102 /* Immutable or append-only files cannot be modified, either. */ 1103 if (node->flags & (IMMUTABLE | APPEND)) 1104 return EPERM; 1105 #endif 1106 1107 /* resize file to the requested size */ 1108 error = udf_resize_node(udf_node, newsize, &extended); 1109 1110 if (error == 0) { 1111 /* mark change */ 1112 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1113 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1114 udf_node->i_flags |= IN_ACCESS; 1115 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1116 udf_update(vp, NULL, NULL, NULL, 0); 1117 } 1118 1119 return error; 1120 } 1121 1122 1123 static int 1124 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1125 { 1126 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1127 return EROFS; 1128 1129 /* 1130 * XXX we can't do this yet, as its not described in the standard yet 1131 */ 1132 1133 return EOPNOTSUPP; 1134 } 1135 1136 1137 static int 1138 udf_chtimes(struct vnode *vp, 1139 struct timespec *atime, struct timespec *mtime, 1140 struct timespec *birthtime, int setattrflags, 1141 kauth_cred_t cred) 1142 { 1143 struct udf_node *udf_node = VTOI(vp); 1144 uid_t uid; 1145 gid_t gid; 1146 int error; 1147 1148 #ifdef notyet 1149 /* TODO get vaflags from the extended attributes? */ 1150 /* Immutable or append-only files cannot be modified, either. */ 1151 if (udf_node->flags & (IMMUTABLE | APPEND)) 1152 return EPERM; 1153 #endif 1154 1155 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1156 return EROFS; 1157 1158 /* retrieve uid/gid values */ 1159 udf_getownership(udf_node, &uid, &gid); 1160 1161 /* check permissions */ 1162 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1163 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1164 if (error) 1165 return (error); 1166 1167 /* update node flags depending on what times are passed */ 1168 if (atime->tv_sec != VNOVAL) 1169 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1170 udf_node->i_flags |= IN_ACCESS; 1171 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1172 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1173 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1174 udf_node->i_flags |= IN_ACCESS; 1175 } 1176 1177 return udf_update(vp, atime, mtime, birthtime, 0); 1178 } 1179 1180 1181 int 1182 udf_setattr(void *v) 1183 { 1184 struct vop_setattr_args /* { 1185 struct vnode *a_vp; 1186 struct vattr *a_vap; 1187 kauth_cred_t a_cred; 1188 struct lwp *a_l; 1189 } */ *ap = v; 1190 struct vnode *vp = ap->a_vp; 1191 /* struct udf_node *udf_node = VTOI(vp); */ 1192 /* struct udf_mount *ump = udf_node->ump; */ 1193 kauth_cred_t cred = ap->a_cred; 1194 struct vattr *vap = ap->a_vap; 1195 int error; 1196 1197 DPRINTF(CALL, ("udf_setattr called\n")); 1198 1199 /* Abort if any unsettable attribute is given. */ 1200 error = 0; 1201 if (vap->va_type != VNON || 1202 vap->va_nlink != VNOVAL || 1203 vap->va_fsid != VNOVAL || 1204 vap->va_fileid != VNOVAL || 1205 vap->va_blocksize != VNOVAL || 1206 #ifdef notyet 1207 /* checks are debated */ 1208 vap->va_ctime.tv_sec != VNOVAL || 1209 vap->va_ctime.tv_nsec != VNOVAL || 1210 vap->va_birthtime.tv_sec != VNOVAL || 1211 vap->va_birthtime.tv_nsec != VNOVAL || 1212 #endif 1213 vap->va_gen != VNOVAL || 1214 vap->va_rdev != VNOVAL || 1215 vap->va_bytes != VNOVAL) 1216 error = EINVAL; 1217 1218 DPRINTF(ATTR, ("setattr changing:\n")); 1219 if (error == 0 && (vap->va_flags != VNOVAL)) { 1220 DPRINTF(ATTR, ("\tchflags\n")); 1221 error = udf_chflags(vp, vap->va_flags, cred); 1222 } 1223 1224 if (error == 0 && (vap->va_size != VNOVAL)) { 1225 DPRINTF(ATTR, ("\tchsize\n")); 1226 error = udf_chsize(vp, vap->va_size, cred); 1227 } 1228 1229 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1230 DPRINTF(ATTR, ("\tchown\n")); 1231 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1232 } 1233 1234 if (error == 0 && (vap->va_mode != VNOVAL)) { 1235 DPRINTF(ATTR, ("\tchmod\n")); 1236 error = udf_chmod(vp, vap->va_mode, cred); 1237 } 1238 1239 if (error == 0 && 1240 ((vap->va_atime.tv_sec != VNOVAL && 1241 vap->va_atime.tv_nsec != VNOVAL) || 1242 (vap->va_mtime.tv_sec != VNOVAL && 1243 vap->va_mtime.tv_nsec != VNOVAL)) 1244 ) { 1245 DPRINTF(ATTR, ("\tchtimes\n")); 1246 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1247 &vap->va_birthtime, vap->va_vaflags, cred); 1248 } 1249 VN_KNOTE(vp, NOTE_ATTRIB); 1250 1251 return error; 1252 } 1253 1254 /* --------------------------------------------------------------------- */ 1255 1256 /* 1257 * Return POSIX pathconf information for UDF file systems. 1258 */ 1259 int 1260 udf_pathconf(void *v) 1261 { 1262 struct vop_pathconf_args /* { 1263 struct vnode *a_vp; 1264 int a_name; 1265 register_t *a_retval; 1266 } */ *ap = v; 1267 uint32_t bits; 1268 1269 DPRINTF(CALL, ("udf_pathconf called\n")); 1270 1271 switch (ap->a_name) { 1272 case _PC_LINK_MAX: 1273 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1274 return 0; 1275 case _PC_NAME_MAX: 1276 *ap->a_retval = UDF_MAXNAMLEN; 1277 return 0; 1278 case _PC_PATH_MAX: 1279 *ap->a_retval = PATH_MAX; 1280 return 0; 1281 case _PC_PIPE_BUF: 1282 *ap->a_retval = PIPE_BUF; 1283 return 0; 1284 case _PC_CHOWN_RESTRICTED: 1285 *ap->a_retval = 1; 1286 return 0; 1287 case _PC_NO_TRUNC: 1288 *ap->a_retval = 1; 1289 return 0; 1290 case _PC_SYNC_IO: 1291 *ap->a_retval = 0; /* synchronised is off for performance */ 1292 return 0; 1293 case _PC_FILESIZEBITS: 1294 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1295 bits = 64; /* XXX ought to deliver 65 */ 1296 #if 0 1297 if (udf_node) 1298 bits = 64 * vp->v_mount->mnt_dev_bshift; 1299 #endif 1300 *ap->a_retval = bits; 1301 return 0; 1302 } 1303 1304 return EINVAL; 1305 } 1306 1307 1308 /* --------------------------------------------------------------------- */ 1309 1310 int 1311 udf_open(void *v) 1312 { 1313 struct vop_open_args /* { 1314 struct vnode *a_vp; 1315 int a_mode; 1316 kauth_cred_t a_cred; 1317 struct proc *a_p; 1318 } */ *ap = v; 1319 int flags; 1320 1321 DPRINTF(CALL, ("udf_open called\n")); 1322 1323 /* 1324 * Files marked append-only must be opened for appending. 1325 * TODO: get chflags(2) flags from extened attribute. 1326 */ 1327 flags = 0; 1328 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1329 return (EPERM); 1330 1331 return 0; 1332 } 1333 1334 1335 /* --------------------------------------------------------------------- */ 1336 1337 int 1338 udf_close(void *v) 1339 { 1340 struct vop_close_args /* { 1341 struct vnode *a_vp; 1342 int a_fflag; 1343 kauth_cred_t a_cred; 1344 struct proc *a_p; 1345 } */ *ap = v; 1346 struct vnode *vp = ap->a_vp; 1347 struct udf_node *udf_node = VTOI(vp); 1348 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1349 int error; 1350 1351 DPRINTF(CALL, ("udf_close called\n")); 1352 udf_node = udf_node; /* shut up gcc */ 1353 1354 if (!async && (vp->v_type != VDIR)) { 1355 mutex_enter(vp->v_interlock); 1356 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1357 if (error) 1358 return error; 1359 } 1360 1361 mutex_enter(vp->v_interlock); 1362 if (vp->v_usecount > 1) 1363 udf_itimes(udf_node, NULL, NULL, NULL); 1364 mutex_exit(vp->v_interlock); 1365 1366 return 0; 1367 } 1368 1369 1370 /* --------------------------------------------------------------------- */ 1371 1372 static int 1373 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1374 { 1375 int flags; 1376 1377 /* check if we are allowed to write */ 1378 switch (vap->va_type) { 1379 case VDIR: 1380 case VLNK: 1381 case VREG: 1382 /* 1383 * normal nodes: check if we're on a read-only mounted 1384 * filingsystem and bomb out if we're trying to write. 1385 */ 1386 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1387 return EROFS; 1388 break; 1389 case VBLK: 1390 case VCHR: 1391 case VSOCK: 1392 case VFIFO: 1393 /* 1394 * special nodes: even on read-only mounted filingsystems 1395 * these are allowed to be written to if permissions allow. 1396 */ 1397 break; 1398 default: 1399 /* no idea what this is */ 1400 return EINVAL; 1401 } 1402 1403 /* noone may write immutable files */ 1404 /* TODO: get chflags(2) flags from extened attribute. */ 1405 flags = 0; 1406 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1407 return EPERM; 1408 1409 return 0; 1410 } 1411 1412 static int 1413 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1414 kauth_cred_t cred) 1415 { 1416 /* ask the generic genfs_can_access to advice on security */ 1417 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1418 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1419 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1420 } 1421 1422 int 1423 udf_access(void *v) 1424 { 1425 struct vop_access_args /* { 1426 struct vnode *a_vp; 1427 int a_mode; 1428 kauth_cred_t a_cred; 1429 struct proc *a_p; 1430 } */ *ap = v; 1431 struct vnode *vp = ap->a_vp; 1432 mode_t mode = ap->a_mode; 1433 kauth_cred_t cred = ap->a_cred; 1434 /* struct udf_node *udf_node = VTOI(vp); */ 1435 struct vattr vap; 1436 int error; 1437 1438 DPRINTF(CALL, ("udf_access called\n")); 1439 1440 error = VOP_GETATTR(vp, &vap, NULL); 1441 if (error) 1442 return error; 1443 1444 error = udf_check_possible(vp, &vap, mode); 1445 if (error) 1446 return error; 1447 1448 error = udf_check_permitted(vp, &vap, mode, cred); 1449 1450 return error; 1451 } 1452 1453 /* --------------------------------------------------------------------- */ 1454 1455 int 1456 udf_create(void *v) 1457 { 1458 struct vop_create_v3_args /* { 1459 struct vnode *a_dvp; 1460 struct vnode **a_vpp; 1461 struct componentname *a_cnp; 1462 struct vattr *a_vap; 1463 } */ *ap = v; 1464 struct vnode *dvp = ap->a_dvp; 1465 struct vnode **vpp = ap->a_vpp; 1466 struct vattr *vap = ap->a_vap; 1467 struct componentname *cnp = ap->a_cnp; 1468 int error; 1469 1470 DPRINTF(CALL, ("udf_create called\n")); 1471 error = udf_create_node(dvp, vpp, vap, cnp); 1472 1473 return error; 1474 } 1475 1476 /* --------------------------------------------------------------------- */ 1477 1478 int 1479 udf_mknod(void *v) 1480 { 1481 struct vop_mknod_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_mknod called\n")); 1494 error = udf_create_node(dvp, vpp, vap, cnp); 1495 1496 return error; 1497 } 1498 1499 /* --------------------------------------------------------------------- */ 1500 1501 int 1502 udf_mkdir(void *v) 1503 { 1504 struct vop_mkdir_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_mkdir called\n")); 1517 error = udf_create_node(dvp, vpp, vap, cnp); 1518 1519 return error; 1520 } 1521 1522 /* --------------------------------------------------------------------- */ 1523 1524 static int 1525 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1526 { 1527 struct udf_node *udf_node, *dir_node; 1528 struct vattr vap; 1529 int error; 1530 1531 DPRINTF(CALL, ("udf_link called\n")); 1532 KASSERT(dvp != vp); 1533 KASSERT(vp->v_type != VDIR); 1534 KASSERT(dvp->v_mount == vp->v_mount); 1535 1536 /* get attributes */ 1537 dir_node = VTOI(dvp); 1538 udf_node = VTOI(vp); 1539 1540 error = VOP_GETATTR(vp, &vap, FSCRED); 1541 if (error) { 1542 VOP_UNLOCK(vp); 1543 return error; 1544 } 1545 1546 /* check link count overflow */ 1547 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1548 VOP_UNLOCK(vp); 1549 return EMLINK; 1550 } 1551 1552 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1553 if (error) 1554 VOP_UNLOCK(vp); 1555 return error; 1556 } 1557 1558 int 1559 udf_link(void *v) 1560 { 1561 struct vop_link_args /* { 1562 struct vnode *a_dvp; 1563 struct vnode *a_vp; 1564 struct componentname *a_cnp; 1565 } */ *ap = v; 1566 struct vnode *dvp = ap->a_dvp; 1567 struct vnode *vp = ap->a_vp; 1568 struct componentname *cnp = ap->a_cnp; 1569 int error; 1570 1571 error = udf_do_link(dvp, vp, cnp); 1572 if (error) 1573 VOP_ABORTOP(dvp, cnp); 1574 1575 VN_KNOTE(vp, NOTE_LINK); 1576 VN_KNOTE(dvp, NOTE_WRITE); 1577 vput(dvp); 1578 1579 return error; 1580 } 1581 1582 /* --------------------------------------------------------------------- */ 1583 1584 static int 1585 udf_do_symlink(struct udf_node *udf_node, char *target) 1586 { 1587 struct pathcomp pathcomp; 1588 uint8_t *pathbuf, *pathpos, *compnamepos; 1589 char *mntonname; 1590 int pathlen, len, compnamelen, mntonnamelen; 1591 int error; 1592 1593 /* process `target' to an UDF structure */ 1594 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1595 pathpos = pathbuf; 1596 pathlen = 0; 1597 1598 if (*target == '/') { 1599 /* symlink starts from the root */ 1600 len = UDF_PATH_COMP_SIZE; 1601 memset(&pathcomp, 0, len); 1602 pathcomp.type = UDF_PATH_COMP_ROOT; 1603 1604 /* check if its mount-point relative! */ 1605 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1606 mntonnamelen = strlen(mntonname); 1607 if (strlen(target) >= mntonnamelen) { 1608 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1609 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1610 target += mntonnamelen; 1611 } 1612 } else { 1613 target++; 1614 } 1615 1616 memcpy(pathpos, &pathcomp, len); 1617 pathpos += len; 1618 pathlen += len; 1619 } 1620 1621 error = 0; 1622 while (*target) { 1623 /* ignore multiple '/' */ 1624 while (*target == '/') { 1625 target++; 1626 } 1627 if (!*target) 1628 break; 1629 1630 /* extract component name */ 1631 compnamelen = 0; 1632 compnamepos = target; 1633 while ((*target) && (*target != '/')) { 1634 target++; 1635 compnamelen++; 1636 } 1637 1638 /* just trunc if too long ?? (security issue) */ 1639 if (compnamelen >= 127) { 1640 error = ENAMETOOLONG; 1641 break; 1642 } 1643 1644 /* convert unix name to UDF name */ 1645 len = sizeof(struct pathcomp); 1646 memset(&pathcomp, 0, len); 1647 pathcomp.type = UDF_PATH_COMP_NAME; 1648 len = UDF_PATH_COMP_SIZE; 1649 1650 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1651 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1652 if ((compnamelen == 1) && (*compnamepos == '.')) 1653 pathcomp.type = UDF_PATH_COMP_CURDIR; 1654 1655 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1656 unix_to_udf_name( 1657 (char *) &pathcomp.ident, &pathcomp.l_ci, 1658 compnamepos, compnamelen, 1659 &udf_node->ump->logical_vol->desc_charset); 1660 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1661 } 1662 1663 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1664 error = ENAMETOOLONG; 1665 break; 1666 } 1667 1668 memcpy(pathpos, &pathcomp, len); 1669 pathpos += len; 1670 pathlen += len; 1671 } 1672 1673 if (error) { 1674 /* aparently too big */ 1675 free(pathbuf, M_UDFTEMP); 1676 return error; 1677 } 1678 1679 error = udf_grow_node(udf_node, pathlen); 1680 if (error) { 1681 /* failed to pregrow node */ 1682 free(pathbuf, M_UDFTEMP); 1683 return error; 1684 } 1685 1686 /* write out structure on the new file */ 1687 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1688 pathbuf, pathlen, 0, 1689 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1690 FSCRED, NULL, NULL); 1691 1692 /* return status of symlink contents writeout */ 1693 free(pathbuf, M_UDFTEMP); 1694 return error; 1695 } 1696 1697 1698 int 1699 udf_symlink(void *v) 1700 { 1701 struct vop_symlink_v3_args /* { 1702 struct vnode *a_dvp; 1703 struct vnode **a_vpp; 1704 struct componentname *a_cnp; 1705 struct vattr *a_vap; 1706 char *a_target; 1707 } */ *ap = v; 1708 struct vnode *dvp = ap->a_dvp; 1709 struct vnode **vpp = ap->a_vpp; 1710 struct vattr *vap = ap->a_vap; 1711 struct componentname *cnp = ap->a_cnp; 1712 struct udf_node *dir_node; 1713 struct udf_node *udf_node; 1714 int error; 1715 1716 DPRINTF(CALL, ("udf_symlink called\n")); 1717 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1718 error = udf_create_node(dvp, vpp, vap, cnp); 1719 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1720 if (!error) { 1721 dir_node = VTOI(dvp); 1722 udf_node = VTOI(*vpp); 1723 KASSERT(udf_node); 1724 error = udf_do_symlink(udf_node, ap->a_target); 1725 if (error) { 1726 /* remove node */ 1727 udf_shrink_node(udf_node, 0); 1728 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1729 } 1730 } 1731 return error; 1732 } 1733 1734 /* --------------------------------------------------------------------- */ 1735 1736 int 1737 udf_readlink(void *v) 1738 { 1739 struct vop_readlink_args /* { 1740 struct vnode *a_vp; 1741 struct uio *a_uio; 1742 kauth_cred_t a_cred; 1743 } */ *ap = v; 1744 struct vnode *vp = ap->a_vp; 1745 struct uio *uio = ap->a_uio; 1746 kauth_cred_t cred = ap->a_cred; 1747 struct udf_node *udf_node; 1748 struct pathcomp pathcomp; 1749 struct vattr vattr; 1750 uint8_t *pathbuf, *targetbuf, *tmpname; 1751 uint8_t *pathpos, *targetpos; 1752 char *mntonname; 1753 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1754 int first, error; 1755 1756 DPRINTF(CALL, ("udf_readlink called\n")); 1757 1758 udf_node = VTOI(vp); 1759 error = VOP_GETATTR(vp, &vattr, cred); 1760 if (error) 1761 return error; 1762 1763 /* claim temporary buffers for translation */ 1764 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1765 targetbuf = malloc(PATH_MAX+1, 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, vattr.va_size, 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(targetbuf, M_UDFTEMP); 1779 free(tmpname, M_UDFTEMP); 1780 return error; 1781 } 1782 1783 /* convert to a unix path */ 1784 pathpos = pathbuf; 1785 pathlen = 0; 1786 targetpos = targetbuf; 1787 targetlen = PATH_MAX; 1788 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1789 mntonnamelen = strlen(mntonname); 1790 1791 error = 0; 1792 first = 1; 1793 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1794 len = UDF_PATH_COMP_SIZE; 1795 memcpy(&pathcomp, pathpos, len); 1796 l_ci = pathcomp.l_ci; 1797 switch (pathcomp.type) { 1798 case UDF_PATH_COMP_ROOT : 1799 /* XXX should check for l_ci; bugcompatible now */ 1800 if ((targetlen < 1) || !first) { 1801 error = EINVAL; 1802 break; 1803 } 1804 *targetpos++ = '/'; targetlen--; 1805 break; 1806 case UDF_PATH_COMP_MOUNTROOT : 1807 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1808 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1809 error = EINVAL; 1810 break; 1811 } 1812 memcpy(targetpos, mntonname, mntonnamelen); 1813 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1814 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1815 /* more follows, so must be directory */ 1816 *targetpos++ = '/'; targetlen--; 1817 } 1818 break; 1819 case UDF_PATH_COMP_PARENTDIR : 1820 /* XXX should check for l_ci; bugcompatible now */ 1821 if (targetlen < 3) { 1822 error = EINVAL; 1823 break; 1824 } 1825 *targetpos++ = '.'; targetlen--; 1826 *targetpos++ = '.'; targetlen--; 1827 *targetpos++ = '/'; targetlen--; 1828 break; 1829 case UDF_PATH_COMP_CURDIR : 1830 /* XXX should check for l_ci; bugcompatible now */ 1831 if (targetlen < 2) { 1832 error = EINVAL; 1833 break; 1834 } 1835 *targetpos++ = '.'; targetlen--; 1836 *targetpos++ = '/'; targetlen--; 1837 break; 1838 case UDF_PATH_COMP_NAME : 1839 if (l_ci == 0) { 1840 error = EINVAL; 1841 break; 1842 } 1843 memset(tmpname, 0, PATH_MAX); 1844 memcpy(&pathcomp, pathpos, len + l_ci); 1845 udf_to_unix_name(tmpname, MAXPATHLEN, 1846 pathcomp.ident, l_ci, 1847 &udf_node->ump->logical_vol->desc_charset); 1848 namelen = strlen(tmpname); 1849 if (targetlen < namelen + 1) { 1850 error = EINVAL; 1851 break; 1852 } 1853 memcpy(targetpos, tmpname, namelen); 1854 targetpos += namelen; targetlen -= namelen; 1855 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1856 /* more follows, so must be directory */ 1857 *targetpos++ = '/'; targetlen--; 1858 } 1859 break; 1860 default : 1861 error = EINVAL; 1862 break; 1863 } 1864 first = 0; 1865 if (error) 1866 break; 1867 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1868 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1869 1870 } 1871 /* all processed? */ 1872 if (vattr.va_size - pathlen > 0) 1873 error = EINVAL; 1874 1875 /* uiomove() to destination */ 1876 if (!error) 1877 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1878 1879 free(pathbuf, M_UDFTEMP); 1880 free(targetbuf, M_UDFTEMP); 1881 free(tmpname, M_UDFTEMP); 1882 1883 return error; 1884 } 1885 1886 /* --------------------------------------------------------------------- */ 1887 1888 /* 1889 * udf_rename() moved to udf_rename.c 1890 */ 1891 1892 /* --------------------------------------------------------------------- */ 1893 1894 int 1895 udf_remove(void *v) 1896 { 1897 struct vop_remove_args /* { 1898 struct vnode *a_dvp; 1899 struct vnode *a_vp; 1900 struct componentname *a_cnp; 1901 } */ *ap = v; 1902 struct vnode *dvp = ap->a_dvp; 1903 struct vnode *vp = ap->a_vp; 1904 struct componentname *cnp = ap->a_cnp; 1905 struct udf_node *dir_node = VTOI(dvp); 1906 struct udf_node *udf_node = VTOI(vp); 1907 struct udf_mount *ump = dir_node->ump; 1908 int error; 1909 1910 DPRINTF(CALL, ("udf_remove called\n")); 1911 if (vp->v_type != VDIR) { 1912 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1913 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1914 } else { 1915 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1916 error = EPERM; 1917 } 1918 1919 if (error == 0) { 1920 VN_KNOTE(vp, NOTE_DELETE); 1921 VN_KNOTE(dvp, NOTE_WRITE); 1922 } 1923 1924 if (dvp == vp) 1925 vrele(vp); 1926 else 1927 vput(vp); 1928 vput(dvp); 1929 1930 return error; 1931 } 1932 1933 /* --------------------------------------------------------------------- */ 1934 1935 int 1936 udf_rmdir(void *v) 1937 { 1938 struct vop_rmdir_args /* { 1939 struct vnode *a_dvp; 1940 struct vnode *a_vp; 1941 struct componentname *a_cnp; 1942 } */ *ap = v; 1943 struct vnode *vp = ap->a_vp; 1944 struct vnode *dvp = ap->a_dvp; 1945 struct componentname *cnp = ap->a_cnp; 1946 struct udf_node *dir_node = VTOI(dvp); 1947 struct udf_node *udf_node = VTOI(vp); 1948 struct udf_mount *ump = dir_node->ump; 1949 int error, isempty; 1950 1951 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1952 1953 /* don't allow '.' to be deleted */ 1954 if (dir_node == udf_node) { 1955 vrele(dvp); 1956 vput(vp); 1957 return EINVAL; 1958 } 1959 1960 /* make sure our `leaf' node's hash is populated */ 1961 dirhash_get(&udf_node->dir_hash); 1962 error = udf_dirhash_fill(udf_node); 1963 if (error) { 1964 dirhash_put(udf_node->dir_hash); 1965 return error; 1966 } 1967 1968 /* check to see if the directory is empty */ 1969 isempty = dirhash_dir_isempty(udf_node->dir_hash); 1970 dirhash_put(udf_node->dir_hash); 1971 1972 if (!isempty) { 1973 vput(dvp); 1974 vput(vp); 1975 return ENOTEMPTY; 1976 } 1977 1978 /* detach the node from the directory, udf_node is an empty dir here */ 1979 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1980 if (error == 0) { 1981 cache_purge(vp); 1982 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1983 /* 1984 * Bug alert: we need to remove '..' from the detaching 1985 * udf_node so further lookups of this are not possible. This 1986 * prevents a process in a deleted directory from going to its 1987 * deleted parent. Since `udf_node' is garanteed to be empty 1988 * here, trunc it so no fids are there. 1989 */ 1990 dirhash_purge(&udf_node->dir_hash); 1991 udf_shrink_node(udf_node, 0); 1992 VN_KNOTE(vp, NOTE_DELETE); 1993 } 1994 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 1995 1996 /* unput the nodes and exit */ 1997 vput(dvp); 1998 vput(vp); 1999 2000 return error; 2001 } 2002 2003 /* --------------------------------------------------------------------- */ 2004 2005 int 2006 udf_fsync(void *v) 2007 { 2008 struct vop_fsync_args /* { 2009 struct vnode *a_vp; 2010 kauth_cred_t a_cred; 2011 int a_flags; 2012 off_t offlo; 2013 off_t offhi; 2014 struct proc *a_p; 2015 } */ *ap = v; 2016 struct vnode *vp = ap->a_vp; 2017 struct udf_node *udf_node = VTOI(vp); 2018 int error, flags, wait; 2019 2020 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2021 udf_node, 2022 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2023 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2024 2025 /* flush data and wait for it when requested */ 2026 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2027 error = vflushbuf(vp, ap->a_flags); 2028 if (error) 2029 return error; 2030 2031 if (udf_node == NULL) { 2032 printf("udf_fsync() called on NULL udf_node!\n"); 2033 return 0; 2034 } 2035 if (vp->v_tag != VT_UDF) { 2036 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2037 return 0; 2038 } 2039 2040 /* set our times */ 2041 udf_itimes(udf_node, NULL, NULL, NULL); 2042 2043 /* if called when mounted readonly, never write back */ 2044 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2045 return 0; 2046 2047 /* if only data is requested, return */ 2048 if (ap->a_flags & FSYNC_DATAONLY) 2049 return 0; 2050 2051 /* check if the node is dirty 'enough'*/ 2052 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2053 if (flags == 0) 2054 return 0; 2055 2056 /* if we don't have to wait, check for IO pending */ 2057 if (!wait) { 2058 if (vp->v_numoutput > 0) { 2059 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2060 return 0; 2061 } 2062 if (udf_node->outstanding_bufs > 0) { 2063 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2064 return 0; 2065 } 2066 if (udf_node->outstanding_nodedscr > 0) { 2067 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2068 return 0; 2069 } 2070 } 2071 2072 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2073 if (wait) { 2074 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2075 mutex_enter(vp->v_interlock); 2076 while (vp->v_numoutput) { 2077 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2078 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2079 } 2080 mutex_exit(vp->v_interlock); 2081 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2082 } 2083 2084 /* write out node and wait for it if requested */ 2085 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2086 error = udf_writeout_node(udf_node, wait); 2087 if (error) 2088 return error; 2089 2090 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2091 2092 return 0; 2093 } 2094 2095 /* --------------------------------------------------------------------- */ 2096 2097 int 2098 udf_advlock(void *v) 2099 { 2100 struct vop_advlock_args /* { 2101 struct vnode *a_vp; 2102 void *a_id; 2103 int a_op; 2104 struct flock *a_fl; 2105 int a_flags; 2106 } */ *ap = v; 2107 struct vnode *vp = ap->a_vp; 2108 struct udf_node *udf_node = VTOI(vp); 2109 struct file_entry *fe; 2110 struct extfile_entry *efe; 2111 uint64_t file_size; 2112 2113 DPRINTF(LOCKING, ("udf_advlock called\n")); 2114 2115 /* get directory filesize */ 2116 if (udf_node->fe) { 2117 fe = udf_node->fe; 2118 file_size = udf_rw64(fe->inf_len); 2119 } else { 2120 assert(udf_node->efe); 2121 efe = udf_node->efe; 2122 file_size = udf_rw64(efe->inf_len); 2123 } 2124 2125 return lf_advlock(ap, &udf_node->lockf, file_size); 2126 } 2127 2128 /* --------------------------------------------------------------------- */ 2129 2130 /* Global vfs vnode data structures for udfs */ 2131 int (**udf_vnodeop_p)(void *); 2132 2133 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2134 { &vop_default_desc, vn_default_error }, 2135 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2136 { &vop_create_desc, udf_create }, /* create */ 2137 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2138 { &vop_open_desc, udf_open }, /* open */ 2139 { &vop_close_desc, udf_close }, /* close */ 2140 { &vop_access_desc, udf_access }, /* access */ 2141 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2142 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2143 { &vop_read_desc, udf_read }, /* read */ 2144 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2145 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2146 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2147 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2148 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2149 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2150 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2151 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2152 { &vop_seek_desc, genfs_seek }, /* seek */ 2153 { &vop_remove_desc, udf_remove }, /* remove */ 2154 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2155 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2156 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2157 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2158 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2159 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2160 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2161 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2162 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2163 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2164 { &vop_lock_desc, genfs_lock }, /* lock */ 2165 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2166 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2167 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2168 /* { &vop_print_desc, udf_print }, */ /* print */ 2169 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2170 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2171 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2172 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2173 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2174 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2175 { NULL, NULL } 2176 }; 2177 2178 2179 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2180 &udf_vnodeop_p, udf_vnodeop_entries 2181 }; 2182
Indexes created Thu Oct 02 14:10:14 GMT 2025