udf_vnops.c revision 1.23.2.2
1 /* $NetBSD: udf_vnops.c,v 1.23.2.2 2008/12/13 01:14:59 haad 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 1.23.2.2 2008/12/13 01:14:59 haad 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 "udf.h" 62 #include "udf_subr.h" 63 #include "udf_bswap.h" 64 65 66 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data) 67 68 69 /* externs */ 70 extern int prtactive; 71 72 /* implementations of vnode functions; table follows at end */ 73 /* --------------------------------------------------------------------- */ 74 75 int 76 udf_inactive(void *v) 77 { 78 struct vop_inactive_args /* { 79 struct vnode *a_vp; 80 bool *a_recycle; 81 } */ *ap = v; 82 struct vnode *vp = ap->a_vp; 83 struct udf_node *udf_node = VTOI(vp); 84 int refcnt; 85 86 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 87 88 if (udf_node == NULL) { 89 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 90 VOP_UNLOCK(vp, 0); 91 return 0; 92 } 93 94 /* 95 * Optionally flush metadata to disc. If the file has not been 96 * referenced anymore in a directory we ought to free up the resources 97 * on disc if applicable. 98 */ 99 if (udf_node->fe) { 100 refcnt = udf_rw16(udf_node->fe->link_cnt); 101 } else { 102 assert(udf_node->efe); 103 refcnt = udf_rw16(udf_node->efe->link_cnt); 104 } 105 106 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) 107 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 108 109 *ap->a_recycle = false; 110 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 111 /* remove this file's allocation */ 112 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 113 *ap->a_recycle = true; 114 udf_delete_node(udf_node); 115 VOP_UNLOCK(vp, 0); 116 vrecycle(vp, NULL, curlwp); 117 return 0; 118 } 119 120 /* write out its node */ 121 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 122 udf_update(vp, NULL, NULL, NULL, 0); 123 VOP_UNLOCK(vp, 0); 124 125 return 0; 126 } 127 128 /* --------------------------------------------------------------------- */ 129 130 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 131 132 int 133 udf_reclaim(void *v) 134 { 135 struct vop_reclaim_args /* { 136 struct vnode *a_vp; 137 } */ *ap = v; 138 struct vnode *vp = ap->a_vp; 139 struct udf_node *udf_node = VTOI(vp); 140 141 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 142 if (prtactive && vp->v_usecount > 1) 143 vprint("udf_reclaim(): pushing active", vp); 144 145 if (udf_node == NULL) { 146 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 147 return 0; 148 } 149 150 /* update note for closure */ 151 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 152 153 /* async check to see if all node descriptors are written out */ 154 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 155 vprint("udf_reclaim(): waiting for writeout\n", vp); 156 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 157 } 158 159 /* purge old data from namei */ 160 cache_purge(vp); 161 162 /* dispose all node knowledge */ 163 udf_dispose_node(udf_node); 164 165 return 0; 166 } 167 168 /* --------------------------------------------------------------------- */ 169 170 int 171 udf_read(void *v) 172 { 173 struct vop_read_args /* { 174 struct vnode *a_vp; 175 struct uio *a_uio; 176 int a_ioflag; 177 kauth_cred_t a_cred; 178 } */ *ap = v; 179 struct vnode *vp = ap->a_vp; 180 struct uio *uio = ap->a_uio; 181 int ioflag = ap->a_ioflag; 182 int advice = IO_ADV_DECODE(ap->a_ioflag); 183 struct uvm_object *uobj; 184 struct udf_node *udf_node = VTOI(vp); 185 struct file_entry *fe; 186 struct extfile_entry *efe; 187 uint64_t file_size; 188 vsize_t len; 189 int error; 190 191 /* 192 * XXX reading from extended attributes not yet implemented. FreeBSD 193 * has it in mind to forward the IO_EXT read call to the 194 * VOP_READEXTATTR(). 195 */ 196 197 DPRINTF(READ, ("udf_read called\n")); 198 199 /* can this happen? some filingsystems have this check */ 200 if (uio->uio_offset < 0) 201 return EINVAL; 202 if (uio->uio_resid == 0) 203 return 0; 204 205 /* protect against rogue programs reading raw directories and links */ 206 if ((ioflag & IO_ALTSEMANTICS) == 0) { 207 if (vp->v_type == VDIR) 208 return EISDIR; 209 /* all but regular files just give EINVAL */ 210 if (vp->v_type != VREG) 211 return EINVAL; 212 } 213 214 assert(udf_node); 215 assert(udf_node->fe || udf_node->efe); 216 217 /* get file/directory filesize */ 218 if (udf_node->fe) { 219 fe = udf_node->fe; 220 file_size = udf_rw64(fe->inf_len); 221 } else { 222 assert(udf_node->efe); 223 efe = udf_node->efe; 224 file_size = udf_rw64(efe->inf_len); 225 } 226 227 /* read contents using buffercache */ 228 uobj = &vp->v_uobj; 229 error = 0; 230 while (uio->uio_resid > 0) { 231 /* reached end? */ 232 if (file_size <= uio->uio_offset) 233 break; 234 235 /* maximise length to file extremity */ 236 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 237 if (len == 0) 238 break; 239 240 /* ubc, here we come, prepare to trap */ 241 error = ubc_uiomove(uobj, uio, len, advice, 242 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 243 if (error) 244 break; 245 } 246 247 /* note access time unless not requested */ 248 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 249 udf_node->i_flags |= IN_ACCESS; 250 if ((ioflag & IO_SYNC) == IO_SYNC) 251 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 252 } 253 254 return error; 255 } 256 257 /* --------------------------------------------------------------------- */ 258 259 int 260 udf_write(void *v) 261 { 262 struct vop_write_args /* { 263 struct vnode *a_vp; 264 struct uio *a_uio; 265 int a_ioflag; 266 kauth_cred_t a_cred; 267 } */ *ap = v; 268 struct vnode *vp = ap->a_vp; 269 struct uio *uio = ap->a_uio; 270 int ioflag = ap->a_ioflag; 271 int advice = IO_ADV_DECODE(ap->a_ioflag); 272 struct uvm_object *uobj; 273 struct udf_node *udf_node = VTOI(vp); 274 struct file_entry *fe; 275 struct extfile_entry *efe; 276 uint64_t file_size, old_size; 277 vsize_t len; 278 int error; 279 int resid, extended; 280 281 /* 282 * XXX writing to extended attributes not yet implemented. FreeBSD has 283 * it in mind to forward the IO_EXT read call to the 284 * VOP_READEXTATTR(). 285 */ 286 287 DPRINTF(WRITE, ("udf_write called\n")); 288 289 /* can this happen? some filingsystems have this check */ 290 if (uio->uio_offset < 0) 291 return EINVAL; 292 if (uio->uio_resid == 0) 293 return 0; 294 295 /* protect against rogue programs writing raw directories or links */ 296 if ((ioflag & IO_ALTSEMANTICS) == 0) { 297 if (vp->v_type == VDIR) 298 return EISDIR; 299 /* all but regular files just give EINVAL for now */ 300 if (vp->v_type != VREG) 301 return EINVAL; 302 } 303 304 assert(udf_node); 305 assert(udf_node->fe || udf_node->efe); 306 307 /* get file/directory filesize */ 308 if (udf_node->fe) { 309 fe = udf_node->fe; 310 file_size = udf_rw64(fe->inf_len); 311 } else { 312 assert(udf_node->efe); 313 efe = udf_node->efe; 314 file_size = udf_rw64(efe->inf_len); 315 } 316 old_size = file_size; 317 318 /* if explicitly asked to append, uio_offset can be wrong? */ 319 if (ioflag & IO_APPEND) 320 uio->uio_offset = file_size; 321 322 extended = (uio->uio_offset + uio->uio_resid > file_size); 323 if (extended) { 324 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 325 file_size, uio->uio_offset + uio->uio_resid)); 326 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 327 if (error) 328 return error; 329 file_size = uio->uio_offset + uio->uio_resid; 330 } 331 332 /* write contents using buffercache */ 333 uobj = &vp->v_uobj; 334 resid = uio->uio_resid; 335 error = 0; 336 337 uvm_vnp_setwritesize(vp, file_size); 338 while (uio->uio_resid > 0) { 339 /* maximise length to file extremity */ 340 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 341 if (len == 0) 342 break; 343 344 /* ubc, here we come, prepare to trap */ 345 error = ubc_uiomove(uobj, uio, len, advice, 346 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 347 if (error) 348 break; 349 } 350 uvm_vnp_setsize(vp, file_size); 351 352 /* mark node changed and request update */ 353 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 354 355 /* 356 * XXX TODO FFS has code here to reset setuid & setgid when we're not 357 * the superuser as a precaution against tampering. 358 */ 359 360 /* if we wrote a thing, note write action on vnode */ 361 if (resid > uio->uio_resid) 362 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 363 364 if (error) { 365 /* bring back file size to its former size */ 366 /* take notice of its errors? */ 367 (void) udf_chsize(vp, (u_quad_t) old_size, NOCRED); 368 369 /* roll back uio */ 370 uio->uio_offset -= resid - uio->uio_resid; 371 uio->uio_resid = resid; 372 } else { 373 /* if we write and we're synchronous, update node */ 374 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 375 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 376 } 377 378 return error; 379 } 380 381 382 /* --------------------------------------------------------------------- */ 383 384 /* 385 * `Special' bmap functionality that translates all incomming requests to 386 * translate to vop_strategy() calls with the same blocknumbers effectively 387 * not translating at all. 388 */ 389 390 int 391 udf_trivial_bmap(void *v) 392 { 393 struct vop_bmap_args /* { 394 struct vnode *a_vp; 395 daddr_t a_bn; 396 struct vnode **a_vpp; 397 daddr_t *a_bnp; 398 int *a_runp; 399 } */ *ap = v; 400 struct vnode *vp = ap->a_vp; /* our node */ 401 struct vnode **vpp = ap->a_vpp; /* return node */ 402 daddr_t *bnp = ap->a_bnp; /* translated */ 403 daddr_t bn = ap->a_bn; /* origional */ 404 int *runp = ap->a_runp; 405 struct udf_node *udf_node = VTOI(vp); 406 uint32_t lb_size; 407 408 /* get logical block size */ 409 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 410 411 /* could return `-1' to indicate holes/zeros */ 412 /* translate 1:1 */ 413 *bnp = bn; 414 415 /* set the vnode to read the data from with strategy on itself */ 416 if (vpp) 417 *vpp = vp; 418 419 /* set runlength of maximum block size */ 420 if (runp) 421 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 422 423 /* return success */ 424 return 0; 425 } 426 427 /* --------------------------------------------------------------------- */ 428 429 int 430 udf_vfsstrategy(void *v) 431 { 432 struct vop_strategy_args /* { 433 struct vnode *a_vp; 434 struct buf *a_bp; 435 } */ *ap = v; 436 struct vnode *vp = ap->a_vp; 437 struct buf *bp = ap->a_bp; 438 struct udf_node *udf_node = VTOI(vp); 439 uint32_t lb_size, from, sectors; 440 int error; 441 442 DPRINTF(STRATEGY, ("udf_strategy called\n")); 443 444 /* check if we ought to be here */ 445 if (vp->v_type == VBLK || vp->v_type == VCHR) 446 panic("udf_strategy: spec"); 447 448 /* only filebuffers ought to be read/write by this, no descriptors */ 449 assert(bp->b_blkno >= 0); 450 451 /* get sector size */ 452 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 453 454 /* calculate sector to start from */ 455 from = bp->b_blkno; 456 457 /* calculate length to fetch/store in sectors */ 458 sectors = bp->b_bcount / lb_size; 459 assert(bp->b_bcount > 0); 460 461 /* NEVER assume later that this buffer is already translated */ 462 /* bp->b_lblkno = bp->b_blkno; */ 463 464 /* check assertions: we OUGHT to always get multiples of this */ 465 assert(sectors * lb_size == bp->b_bcount); 466 467 /* issue buffer */ 468 error = 0; 469 if (bp->b_flags & B_READ) { 470 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 471 ", sector %d for %d sectors\n", 472 vp, bp, bp->b_blkno, from, sectors)); 473 474 /* read buffer from the udf_node, translate vtop on the way*/ 475 udf_read_filebuf(udf_node, bp); 476 } else { 477 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 478 ", sector %d for %d sectors\n", 479 vp, bp, bp->b_blkno, from, sectors)); 480 481 /* write buffer to the udf_node, translate vtop on the way*/ 482 udf_write_filebuf(udf_node, bp); 483 } 484 485 return bp->b_error; 486 } 487 488 /* --------------------------------------------------------------------- */ 489 490 int 491 udf_readdir(void *v) 492 { 493 struct vop_readdir_args /* { 494 struct vnode *a_vp; 495 struct uio *a_uio; 496 kauth_cred_t a_cred; 497 int *a_eofflag; 498 off_t **a_cookies; 499 int *a_ncookies; 500 } */ *ap = v; 501 struct uio *uio = ap->a_uio; 502 struct vnode *vp = ap->a_vp; 503 struct udf_node *udf_node = VTOI(vp); 504 struct file_entry *fe; 505 struct extfile_entry *efe; 506 struct fileid_desc *fid; 507 struct dirent *dirent; 508 uint64_t file_size, diroffset, transoffset; 509 uint32_t lb_size; 510 int error; 511 512 DPRINTF(READDIR, ("udf_readdir called\n")); 513 514 /* This operation only makes sense on directory nodes. */ 515 if (vp->v_type != VDIR) 516 return ENOTDIR; 517 518 /* get directory filesize */ 519 if (udf_node->fe) { 520 fe = udf_node->fe; 521 file_size = udf_rw64(fe->inf_len); 522 } else { 523 assert(udf_node->efe); 524 efe = udf_node->efe; 525 file_size = udf_rw64(efe->inf_len); 526 } 527 528 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 529 530 /* 531 * Add `.' pseudo entry if at offset zero since its not in the fid 532 * stream 533 */ 534 if (uio->uio_offset == 0) { 535 DPRINTF(READDIR, ("\t'.' inserted\n")); 536 strcpy(dirent->d_name, "."); 537 dirent->d_fileno = udf_calchash(&udf_node->loc); 538 dirent->d_type = DT_DIR; 539 dirent->d_namlen = strlen(dirent->d_name); 540 dirent->d_reclen = _DIRENT_SIZE(dirent); 541 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 542 543 /* mark with magic value that we have done the dummy */ 544 uio->uio_offset = UDF_DIRCOOKIE_DOT; 545 } 546 547 /* we are called just as long as we keep on pushing data in */ 548 error = 0; 549 if ((uio->uio_offset < file_size) && 550 (uio->uio_resid >= sizeof(struct dirent))) { 551 /* allocate temporary space for fid */ 552 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 553 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 554 555 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 556 uio->uio_offset = 0; 557 558 diroffset = uio->uio_offset; 559 transoffset = diroffset; 560 while (diroffset < file_size) { 561 DPRINTF(READDIR, ("\tread in fid stream\n")); 562 /* transfer a new fid/dirent */ 563 error = udf_read_fid_stream(vp, &diroffset, 564 fid, dirent); 565 DPRINTFIF(READDIR, error, ("read error in read fid " 566 "stream : %d\n", error)); 567 if (error) 568 break; 569 570 /* 571 * If there isn't enough space in the uio to return a 572 * whole dirent, break off read 573 */ 574 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 575 break; 576 577 /* remember the last entry we transfered */ 578 transoffset = diroffset; 579 580 /* skip deleted entries */ 581 if (fid->file_char & UDF_FILE_CHAR_DEL) 582 continue; 583 584 /* skip not visible files */ 585 if (fid->file_char & UDF_FILE_CHAR_VIS) 586 continue; 587 588 /* copy dirent to the caller */ 589 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 590 dirent->d_name, dirent->d_type)); 591 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 592 } 593 594 /* pass on last transfered offset */ 595 uio->uio_offset = transoffset; 596 free(fid, M_UDFTEMP); 597 } 598 599 if (ap->a_eofflag) 600 *ap->a_eofflag = (uio->uio_offset == file_size); 601 602 #ifdef DEBUG 603 if (udf_verbose & UDF_DEBUG_READDIR) { 604 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 605 if (ap->a_eofflag) 606 printf("returning EOF ? %d\n", *ap->a_eofflag); 607 if (error) 608 printf("readdir returning error %d\n", error); 609 } 610 #endif 611 612 free(dirent, M_UDFTEMP); 613 return error; 614 } 615 616 /* --------------------------------------------------------------------- */ 617 618 int 619 udf_lookup(void *v) 620 { 621 struct vop_lookup_args /* { 622 struct vnode *a_dvp; 623 struct vnode **a_vpp; 624 struct componentname *a_cnp; 625 } */ *ap = v; 626 struct vnode *dvp = ap->a_dvp; 627 struct vnode **vpp = ap->a_vpp; 628 struct componentname *cnp = ap->a_cnp; 629 struct udf_node *dir_node, *res_node; 630 struct udf_mount *ump; 631 struct long_ad icb_loc; 632 const char *name; 633 int namelen, nameiop, islastcn, mounted_ro; 634 int vnodetp; 635 int error, found; 636 637 dir_node = VTOI(dvp); 638 ump = dir_node->ump; 639 *vpp = NULL; 640 641 DPRINTF(LOOKUP, ("udf_lookup called\n")); 642 643 /* simplify/clarification flags */ 644 nameiop = cnp->cn_nameiop; 645 islastcn = cnp->cn_flags & ISLASTCN; 646 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 647 648 /* check exec/dirread permissions first */ 649 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 650 if (error) 651 return error; 652 653 DPRINTF(LOOKUP, ("\taccess ok\n")); 654 655 /* 656 * If requesting a modify on the last path element on a read-only 657 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 658 */ 659 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 660 return EROFS; 661 662 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 663 cnp->cn_nameptr)); 664 /* look in the nami cache; returns 0 on success!! */ 665 error = cache_lookup(dvp, vpp, cnp); 666 if (error >= 0) 667 return error; 668 669 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 670 671 /* 672 * Obviously, the file is not (anymore) in the namecache, we have to 673 * search for it. There are three basic cases: '.', '..' and others. 674 * 675 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 676 */ 677 error = 0; 678 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 679 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 680 /* special case 1 '.' */ 681 VREF(dvp); 682 *vpp = dvp; 683 /* done */ 684 } else if (cnp->cn_flags & ISDOTDOT) { 685 /* special case 2 '..' */ 686 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 687 688 /* get our node */ 689 name = ".."; 690 namelen = 2; 691 error = udf_lookup_name_in_dir(dvp, name, namelen, 692 &icb_loc, &found); 693 if (error) 694 goto out; 695 if (!found) 696 error = ENOENT; 697 698 /* first unlock parent */ 699 VOP_UNLOCK(dvp, 0); 700 701 if (error == 0) { 702 DPRINTF(LOOKUP, ("\tfound '..'\n")); 703 /* try to create/reuse the node */ 704 error = udf_get_node(ump, &icb_loc, &res_node); 705 706 if (!error) { 707 DPRINTF(LOOKUP, 708 ("\tnode retrieved/created OK\n")); 709 *vpp = res_node->vnode; 710 } 711 } 712 713 /* try to relock parent */ 714 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 715 } else { 716 DPRINTF(LOOKUP, ("\tlookup file\n")); 717 /* all other files */ 718 /* lookup filename in the directory; location icb_loc */ 719 name = cnp->cn_nameptr; 720 namelen = cnp->cn_namelen; 721 error = udf_lookup_name_in_dir(dvp, name, namelen, 722 &icb_loc, &found); 723 if (error) 724 goto out; 725 if (!found) { 726 DPRINTF(LOOKUP, ("\tNOT found\n")); 727 /* 728 * UGH, didn't find name. If we're creating or 729 * renaming on the last name this is OK and we ought 730 * to return EJUSTRETURN if its allowed to be created. 731 */ 732 error = ENOENT; 733 if (islastcn && 734 (nameiop == CREATE || nameiop == RENAME)) 735 error = 0; 736 if (!error) { 737 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 738 if (!error) { 739 /* keep the component name */ 740 cnp->cn_flags |= SAVENAME; 741 error = EJUSTRETURN; 742 } 743 } 744 /* done */ 745 } else { 746 /* try to create/reuse the node */ 747 error = udf_get_node(ump, &icb_loc, &res_node); 748 if (!error) { 749 /* 750 * If we are not at the last path component 751 * and found a non-directory or non-link entry 752 * (which may itself be pointing to a 753 * directory), raise an error. 754 */ 755 vnodetp = res_node->vnode->v_type; 756 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 757 if (!islastcn) 758 error = ENOTDIR; 759 } 760 761 } 762 if (!error) { 763 *vpp = res_node->vnode; 764 } 765 } 766 } 767 768 out: 769 /* 770 * Store result in the cache if requested. If we are creating a file, 771 * the file might not be found and thus putting it into the namecache 772 * might be seen as negative caching. 773 */ 774 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 775 cache_enter(dvp, *vpp, cnp); 776 777 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 778 779 return error; 780 } 781 782 /* --------------------------------------------------------------------- */ 783 784 int 785 udf_getattr(void *v) 786 { 787 struct vop_getattr_args /* { 788 struct vnode *a_vp; 789 struct vattr *a_vap; 790 kauth_cred_t a_cred; 791 struct lwp *a_l; 792 } */ *ap = v; 793 struct vnode *vp = ap->a_vp; 794 struct udf_node *udf_node = VTOI(vp); 795 struct udf_mount *ump = udf_node->ump; 796 struct file_entry *fe = udf_node->fe; 797 struct extfile_entry *efe = udf_node->efe; 798 struct filetimes_extattr_entry *ft_extattr; 799 struct device_extattr_entry *devattr; 800 struct vattr *vap = ap->a_vap; 801 struct timestamp *atime, *mtime, *attrtime, *creatime; 802 uint64_t filesize, blkssize; 803 uint32_t nlink; 804 uint32_t offset, a_l; 805 uint8_t *filedata; 806 uid_t uid; 807 gid_t gid; 808 int error; 809 810 DPRINTF(CALL, ("udf_getattr called\n")); 811 812 /* update times before we returning values */ 813 udf_itimes(udf_node, NULL, NULL, NULL); 814 815 /* get descriptor information */ 816 if (fe) { 817 nlink = udf_rw16(fe->link_cnt); 818 uid = (uid_t)udf_rw32(fe->uid); 819 gid = (gid_t)udf_rw32(fe->gid); 820 filesize = udf_rw64(fe->inf_len); 821 blkssize = udf_rw64(fe->logblks_rec); 822 atime = &fe->atime; 823 mtime = &fe->mtime; 824 attrtime = &fe->attrtime; 825 filedata = fe->data; 826 827 /* initial guess */ 828 creatime = mtime; 829 830 /* check our extended attribute if present */ 831 error = udf_extattr_search_intern(udf_node, 832 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 833 if (!error) { 834 ft_extattr = (struct filetimes_extattr_entry *) 835 (filedata + offset); 836 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 837 creatime = &ft_extattr->times[0]; 838 } 839 } else { 840 assert(udf_node->efe); 841 nlink = udf_rw16(efe->link_cnt); 842 uid = (uid_t)udf_rw32(efe->uid); 843 gid = (gid_t)udf_rw32(efe->gid); 844 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 845 blkssize = udf_rw64(efe->logblks_rec); 846 atime = &efe->atime; 847 mtime = &efe->mtime; 848 attrtime = &efe->attrtime; 849 creatime = &efe->ctime; 850 filedata = efe->data; 851 } 852 853 /* do the uid/gid translation game */ 854 if (uid == (uid_t) -1) 855 uid = ump->mount_args.anon_uid; 856 if (gid == (gid_t) -1) 857 gid = ump->mount_args.anon_gid; 858 859 /* fill in struct vattr with values from the node */ 860 VATTR_NULL(vap); 861 vap->va_type = vp->v_type; 862 vap->va_mode = udf_getaccessmode(udf_node); 863 vap->va_nlink = nlink; 864 vap->va_uid = uid; 865 vap->va_gid = gid; 866 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 867 vap->va_fileid = udf_calchash(&udf_node->loc); /* inode hash XXX */ 868 vap->va_size = filesize; 869 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 870 871 /* 872 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 873 * 1 to the link count if its a directory we're requested attributes 874 * of. 875 */ 876 if (vap->va_type == VDIR) 877 vap->va_nlink++; 878 879 /* access times */ 880 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 881 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 882 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 883 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 884 885 vap->va_gen = 1; /* no multiple generations yes (!?) */ 886 vap->va_flags = 0; /* no flags */ 887 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 888 vap->va_filerev = 1; /* TODO file revision numbers? */ 889 vap->va_vaflags = 0; 890 /* TODO get vaflags from the extended attributes? */ 891 892 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 893 error = udf_extattr_search_intern(udf_node, 894 UDF_DEVICESPEC_ATTR_NO, "", 895 &offset, &a_l); 896 /* if error, deny access */ 897 if (error || (filedata == NULL)) { 898 vap->va_mode = 0; /* or v_type = VNON? */ 899 } else { 900 devattr = (struct device_extattr_entry *) 901 filedata + offset; 902 vap->va_rdev = makedev( 903 udf_rw32(devattr->major), 904 udf_rw32(devattr->minor) 905 ); 906 /* TODO we could check the implementator */ 907 } 908 } 909 910 return 0; 911 } 912 913 /* --------------------------------------------------------------------- */ 914 915 static int 916 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 917 kauth_cred_t cred) 918 { 919 struct udf_node *udf_node = VTOI(vp); 920 uid_t euid, uid; 921 gid_t egid, gid; 922 int issuperuser, ismember; 923 int error; 924 925 #ifdef notyet 926 /* TODO get vaflags from the extended attributes? */ 927 /* Immutable or append-only files cannot be modified, either. */ 928 if (udf_node->flags & (IMMUTABLE | APPEND)) 929 return EPERM; 930 #endif 931 932 if (vp->v_mount->mnt_flag & MNT_RDONLY) 933 return EROFS; 934 935 /* retrieve old values */ 936 udf_getownership(udf_node, &uid, &gid); 937 938 /* only one could be specified */ 939 if (new_uid == VNOVAL) 940 new_uid = uid; 941 if (new_gid == VNOVAL) 942 new_gid = gid; 943 944 /* check if we can fit it in an 32 bits */ 945 if ((uid_t) ((uint32_t) uid) != uid) 946 return EINVAL; 947 if ((gid_t) ((uint32_t) gid) != gid) 948 return EINVAL; 949 950 /* 951 * If we don't own the file, are trying to change the owner of the 952 * file, or are not a member of the target group, the caller's 953 * credentials must imply super-user privilege or the call fails. 954 */ 955 956 /* check permissions */ 957 euid = kauth_cred_geteuid(cred); 958 egid = kauth_cred_getegid(cred); 959 if ((error = kauth_cred_ismember_gid(cred, new_gid, &ismember))) 960 return error; 961 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 962 issuperuser = (error == 0); 963 964 if (!issuperuser) { 965 if ((new_uid != uid) || (euid != uid)) 966 return EPERM; 967 if ((new_gid != gid) && !(egid == new_gid || ismember)) 968 return EPERM; 969 } 970 971 /* change the ownership */ 972 udf_setownership(udf_node, new_uid, new_gid); 973 974 /* mark node changed */ 975 udf_node->i_flags |= IN_CHANGE; 976 977 return 0; 978 } 979 980 981 static int 982 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 983 { 984 struct udf_node *udf_node = VTOI(vp); 985 uid_t euid, uid; 986 gid_t egid, gid; 987 int issuperuser, ismember; 988 int error; 989 990 #ifdef notyet 991 /* TODO get vaflags from the extended attributes? */ 992 /* Immutable or append-only files cannot be modified, either. */ 993 if (udf_node->flags & (IMMUTABLE | APPEND)) 994 return EPERM; 995 #endif 996 997 if (vp->v_mount->mnt_flag & MNT_RDONLY) 998 return EROFS; 999 1000 /* retrieve uid/gid values */ 1001 udf_getownership(udf_node, &uid, &gid); 1002 1003 /* check permissions */ 1004 euid = kauth_cred_geteuid(cred); 1005 egid = kauth_cred_getegid(cred); 1006 if ((error = kauth_cred_ismember_gid(cred, gid, &ismember))) 1007 return error; 1008 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1009 issuperuser = (error == 0); 1010 1011 if ((euid != uid) && !issuperuser) 1012 return EPERM; 1013 if (euid != 0) { 1014 if (vp->v_type != VDIR && (mode & S_ISTXT)) 1015 return EFTYPE; 1016 1017 if ((!ismember) && (mode & S_ISGID)) 1018 return EPERM; 1019 } 1020 1021 /* change mode */ 1022 udf_setaccessmode(udf_node, mode); 1023 1024 /* mark node changed */ 1025 udf_node->i_flags |= IN_CHANGE; 1026 1027 return 0; 1028 } 1029 1030 1031 /* exported */ 1032 int 1033 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1034 { 1035 struct udf_node *udf_node = VTOI(vp); 1036 int error, extended; 1037 1038 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1039 return EROFS; 1040 1041 /* Decide whether this is a valid operation based on the file type. */ 1042 switch (vp->v_type) { 1043 case VDIR: 1044 return EISDIR; 1045 case VREG: 1046 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1047 return EROFS; 1048 break; 1049 case VBLK: 1050 /* FALLTHROUGH */ 1051 case VCHR: 1052 /* FALLTHROUGH */ 1053 case VFIFO: 1054 /* Allow modifications of special files even if in the file 1055 * system is mounted read-only (we are not modifying the 1056 * files themselves, but the objects they represent). */ 1057 return 0; 1058 default: 1059 /* Anything else is unsupported. */ 1060 return EOPNOTSUPP; 1061 } 1062 1063 #if notyet 1064 /* TODO get vaflags from the extended attributes? */ 1065 /* Immutable or append-only files cannot be modified, either. */ 1066 if (node->flags & (IMMUTABLE | APPEND)) 1067 return EPERM; 1068 #endif 1069 1070 /* resize file to the requested size */ 1071 error = udf_resize_node(udf_node, newsize, &extended); 1072 1073 if (error == 0) { 1074 /* mark change */ 1075 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1076 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1077 udf_update(vp, NULL, NULL, NULL, 0); 1078 } 1079 1080 return error; 1081 } 1082 1083 1084 static int 1085 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1086 { 1087 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1088 return EROFS; 1089 1090 /* XXX we can't do this yet XXX */ 1091 1092 return EINVAL; 1093 } 1094 1095 1096 static int 1097 udf_chtimes(struct vnode *vp, 1098 struct timespec *atime, struct timespec *mtime, 1099 struct timespec *birthtime, int setattrflags, 1100 kauth_cred_t cred) 1101 { 1102 struct udf_node *udf_node = VTOI(vp); 1103 uid_t euid, uid; 1104 gid_t gid; 1105 int issuperuser; 1106 int error; 1107 1108 #ifdef notyet 1109 /* TODO get vaflags from the extended attributes? */ 1110 /* Immutable or append-only files cannot be modified, either. */ 1111 if (udf_node->flags & (IMMUTABLE | APPEND)) 1112 return EPERM; 1113 #endif 1114 1115 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1116 return EROFS; 1117 1118 /* retrieve uid/gid values */ 1119 udf_getownership(udf_node, &uid, &gid); 1120 1121 /* check permissions */ 1122 euid = kauth_cred_geteuid(cred); 1123 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1124 issuperuser = (error == 0); 1125 1126 if (!issuperuser) { 1127 if (euid != uid) 1128 return EPERM; 1129 if ((setattrflags & VA_UTIMES_NULL) == 0) { 1130 error = VOP_ACCESS(vp, VWRITE, cred); 1131 if (error) 1132 return error; 1133 } 1134 } 1135 1136 /* update node flags depending on what times are passed */ 1137 if (atime->tv_sec != VNOVAL) 1138 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1139 udf_node->i_flags |= IN_ACCESS; 1140 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1141 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1142 1143 return udf_update(vp, atime, mtime, birthtime, 0); 1144 } 1145 1146 1147 int 1148 udf_setattr(void *v) 1149 { 1150 struct vop_setattr_args /* { 1151 struct vnode *a_vp; 1152 struct vattr *a_vap; 1153 kauth_cred_t a_cred; 1154 struct lwp *a_l; 1155 } */ *ap = v; 1156 struct vnode *vp = ap->a_vp; 1157 /* struct udf_node *udf_node = VTOI(vp); */ 1158 /* struct udf_mount *ump = udf_node->ump; */ 1159 kauth_cred_t cred = ap->a_cred; 1160 struct vattr *vap = ap->a_vap; 1161 int error; 1162 1163 DPRINTF(CALL, ("udf_setattr called\n")); 1164 1165 /* Abort if any unsettable attribute is given. */ 1166 error = 0; 1167 if (vap->va_type != VNON || 1168 vap->va_nlink != VNOVAL || 1169 vap->va_fsid != VNOVAL || 1170 vap->va_fileid != VNOVAL || 1171 vap->va_blocksize != VNOVAL || 1172 #ifdef notyet 1173 /* checks are debated */ 1174 vap->va_ctime.tv_sec != VNOVAL || 1175 vap->va_ctime.tv_nsec != VNOVAL || 1176 vap->va_birthtime.tv_sec != VNOVAL || 1177 vap->va_birthtime.tv_nsec != VNOVAL || 1178 #endif 1179 vap->va_gen != VNOVAL || 1180 vap->va_rdev != VNOVAL || 1181 vap->va_bytes != VNOVAL) 1182 error = EINVAL; 1183 1184 DPRINTF(ATTR, ("setattr changing:\n")); 1185 if (error == 0 && (vap->va_flags != VNOVAL)) { 1186 DPRINTF(ATTR, ("\tchflags\n")); 1187 error = udf_chflags(vp, vap->va_flags, cred); 1188 } 1189 1190 if (error == 0 && (vap->va_size != VNOVAL)) { 1191 DPRINTF(ATTR, ("\tchsize\n")); 1192 error = udf_chsize(vp, vap->va_size, cred); 1193 } 1194 1195 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1196 DPRINTF(ATTR, ("\tchown\n")); 1197 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1198 } 1199 1200 if (error == 0 && (vap->va_mode != VNOVAL)) { 1201 DPRINTF(ATTR, ("\tchmod\n")); 1202 error = udf_chmod(vp, vap->va_mode, cred); 1203 } 1204 1205 if (error == 0 && 1206 ((vap->va_atime.tv_sec != VNOVAL && 1207 vap->va_atime.tv_nsec != VNOVAL) || 1208 (vap->va_mtime.tv_sec != VNOVAL && 1209 vap->va_mtime.tv_nsec != VNOVAL)) 1210 ) { 1211 DPRINTF(ATTR, ("\tchtimes\n")); 1212 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1213 &vap->va_birthtime, vap->va_vaflags, cred); 1214 } 1215 VN_KNOTE(vp, NOTE_ATTRIB); 1216 1217 return error; 1218 } 1219 1220 /* --------------------------------------------------------------------- */ 1221 1222 /* 1223 * Return POSIX pathconf information for UDF file systems. 1224 */ 1225 int 1226 udf_pathconf(void *v) 1227 { 1228 struct vop_pathconf_args /* { 1229 struct vnode *a_vp; 1230 int a_name; 1231 register_t *a_retval; 1232 } */ *ap = v; 1233 uint32_t bits; 1234 1235 DPRINTF(CALL, ("udf_pathconf called\n")); 1236 1237 switch (ap->a_name) { 1238 case _PC_LINK_MAX: 1239 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1240 return 0; 1241 case _PC_NAME_MAX: 1242 *ap->a_retval = NAME_MAX; 1243 return 0; 1244 case _PC_PATH_MAX: 1245 *ap->a_retval = PATH_MAX; 1246 return 0; 1247 case _PC_PIPE_BUF: 1248 *ap->a_retval = PIPE_BUF; 1249 return 0; 1250 case _PC_CHOWN_RESTRICTED: 1251 *ap->a_retval = 1; 1252 return 0; 1253 case _PC_NO_TRUNC: 1254 *ap->a_retval = 1; 1255 return 0; 1256 case _PC_SYNC_IO: 1257 *ap->a_retval = 0; /* synchronised is off for performance */ 1258 return 0; 1259 case _PC_FILESIZEBITS: 1260 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1261 bits = 64; /* XXX ought to deliver 65 */ 1262 #if 0 1263 if (udf_node) 1264 bits = 64 * vp->v_mount->mnt_dev_bshift; 1265 #endif 1266 *ap->a_retval = bits; 1267 return 0; 1268 } 1269 1270 return EINVAL; 1271 } 1272 1273 1274 /* --------------------------------------------------------------------- */ 1275 1276 int 1277 udf_open(void *v) 1278 { 1279 struct vop_open_args /* { 1280 struct vnode *a_vp; 1281 int a_mode; 1282 kauth_cred_t a_cred; 1283 struct proc *a_p; 1284 } */ *ap = v; 1285 int flags; 1286 1287 DPRINTF(CALL, ("udf_open called\n")); 1288 1289 /* 1290 * Files marked append-only must be opened for appending. 1291 * TODO: get chflags(2) flags from extened attribute. 1292 */ 1293 flags = 0; 1294 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1295 return (EPERM); 1296 1297 return 0; 1298 } 1299 1300 1301 /* --------------------------------------------------------------------- */ 1302 1303 int 1304 udf_close(void *v) 1305 { 1306 struct vop_close_args /* { 1307 struct vnode *a_vp; 1308 int a_fflag; 1309 kauth_cred_t a_cred; 1310 struct proc *a_p; 1311 } */ *ap = v; 1312 struct vnode *vp = ap->a_vp; 1313 struct udf_node *udf_node = VTOI(vp); 1314 1315 DPRINTF(CALL, ("udf_close called\n")); 1316 udf_node = udf_node; /* shut up gcc */ 1317 1318 mutex_enter(&vp->v_interlock); 1319 if (vp->v_usecount > 1) 1320 udf_itimes(udf_node, NULL, NULL, NULL); 1321 mutex_exit(&vp->v_interlock); 1322 1323 return 0; 1324 } 1325 1326 1327 /* --------------------------------------------------------------------- */ 1328 1329 int 1330 udf_access(void *v) 1331 { 1332 struct vop_access_args /* { 1333 struct vnode *a_vp; 1334 int a_mode; 1335 kauth_cred_t a_cred; 1336 struct proc *a_p; 1337 } */ *ap = v; 1338 struct vnode *vp = ap->a_vp; 1339 mode_t mode = ap->a_mode; 1340 kauth_cred_t cred = ap->a_cred; 1341 /* struct udf_node *udf_node = VTOI(vp); */ 1342 struct vattr vap; 1343 int flags; 1344 int error; 1345 1346 DPRINTF(CALL, ("udf_access called\n")); 1347 1348 error = VOP_GETATTR(vp, &vap, NULL); 1349 if (error) 1350 return error; 1351 1352 /* check if we are allowed to write */ 1353 switch (vap.va_type) { 1354 case VDIR: 1355 case VLNK: 1356 case VREG: 1357 /* 1358 * normal nodes: check if we're on a read-only mounted 1359 * filingsystem and bomb out if we're trying to write. 1360 */ 1361 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1362 return EROFS; 1363 break; 1364 case VBLK: 1365 case VCHR: 1366 case VSOCK: 1367 case VFIFO: 1368 /* 1369 * special nodes: even on read-only mounted filingsystems 1370 * these are allowed to be written to if permissions allow. 1371 */ 1372 break; 1373 default: 1374 /* no idea what this is */ 1375 return EINVAL; 1376 } 1377 1378 /* noone may write immutable files */ 1379 /* TODO: get chflags(2) flags from extened attribute. */ 1380 flags = 0; 1381 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1382 return EPERM; 1383 1384 /* ask the generic vaccess to advice on security */ 1385 return vaccess(vp->v_type, 1386 vap.va_mode, vap.va_uid, vap.va_gid, 1387 mode, cred); 1388 } 1389 1390 /* --------------------------------------------------------------------- */ 1391 1392 int 1393 udf_create(void *v) 1394 { 1395 struct vop_create_args /* { 1396 struct vnode *a_dvp; 1397 struct vnode **a_vpp; 1398 struct componentname *a_cnp; 1399 struct vattr *a_vap; 1400 } */ *ap = v; 1401 struct vnode *dvp = ap->a_dvp; 1402 struct vnode **vpp = ap->a_vpp; 1403 struct vattr *vap = ap->a_vap; 1404 struct componentname *cnp = ap->a_cnp; 1405 int error; 1406 1407 DPRINTF(CALL, ("udf_create called\n")); 1408 error = udf_create_node(dvp, vpp, vap, cnp); 1409 1410 if (error || !(cnp->cn_flags & SAVESTART)) 1411 PNBUF_PUT(cnp->cn_pnbuf); 1412 vput(dvp); 1413 return error; 1414 } 1415 1416 /* --------------------------------------------------------------------- */ 1417 1418 int 1419 udf_mknod(void *v) 1420 { 1421 struct vop_mknod_args /* { 1422 struct vnode *a_dvp; 1423 struct vnode **a_vpp; 1424 struct componentname *a_cnp; 1425 struct vattr *a_vap; 1426 } */ *ap = v; 1427 struct vnode *dvp = ap->a_dvp; 1428 struct vnode **vpp = ap->a_vpp; 1429 struct vattr *vap = ap->a_vap; 1430 struct componentname *cnp = ap->a_cnp; 1431 int error; 1432 1433 DPRINTF(CALL, ("udf_mknod called\n")); 1434 error = udf_create_node(dvp, vpp, vap, cnp); 1435 1436 if (error || !(cnp->cn_flags & SAVESTART)) 1437 PNBUF_PUT(cnp->cn_pnbuf); 1438 vput(dvp); 1439 return error; 1440 } 1441 1442 /* --------------------------------------------------------------------- */ 1443 1444 int 1445 udf_mkdir(void *v) 1446 { 1447 struct vop_mkdir_args /* { 1448 struct vnode *a_dvp; 1449 struct vnode **a_vpp; 1450 struct componentname *a_cnp; 1451 struct vattr *a_vap; 1452 } */ *ap = v; 1453 struct vnode *dvp = ap->a_dvp; 1454 struct vnode **vpp = ap->a_vpp; 1455 struct vattr *vap = ap->a_vap; 1456 struct componentname *cnp = ap->a_cnp; 1457 int error; 1458 1459 DPRINTF(CALL, ("udf_mkdir called\n")); 1460 error = udf_create_node(dvp, vpp, vap, cnp); 1461 1462 if (error || !(cnp->cn_flags & SAVESTART)) 1463 PNBUF_PUT(cnp->cn_pnbuf); 1464 vput(dvp); 1465 return error; 1466 } 1467 1468 /* --------------------------------------------------------------------- */ 1469 1470 static int 1471 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1472 { 1473 struct udf_node *udf_node, *dir_node; 1474 struct vattr vap; 1475 int error; 1476 1477 DPRINTF(CALL, ("udf_link called\n")); 1478 error = 0; 1479 1480 /* some quick checks */ 1481 if (vp->v_type == VDIR) 1482 return EPERM; /* can't link a directory */ 1483 if (dvp->v_mount != vp->v_mount) 1484 return EXDEV; /* can't link across devices */ 1485 if (dvp == vp) 1486 return EPERM; /* can't be the same */ 1487 1488 /* lock node */ 1489 error = vn_lock(vp, LK_EXCLUSIVE); 1490 if (error) 1491 return error; 1492 1493 /* get attributes */ 1494 dir_node = VTOI(dvp); 1495 udf_node = VTOI(vp); 1496 1497 error = VOP_GETATTR(vp, &vap, FSCRED); 1498 if (error) 1499 return error; 1500 1501 /* check link count overflow */ 1502 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1503 return EMLINK; 1504 1505 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1506 } 1507 1508 int 1509 udf_link(void *v) 1510 { 1511 struct vop_link_args /* { 1512 struct vnode *a_dvp; 1513 struct vnode *a_vp; 1514 struct componentname *a_cnp; 1515 } */ *ap = v; 1516 struct vnode *dvp = ap->a_dvp; 1517 struct vnode *vp = ap->a_vp; 1518 struct componentname *cnp = ap->a_cnp; 1519 int error; 1520 1521 error = udf_do_link(dvp, vp, cnp); 1522 if (error) 1523 VOP_ABORTOP(dvp, cnp); 1524 1525 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1526 VOP_UNLOCK(vp, 0); 1527 1528 VN_KNOTE(vp, NOTE_LINK); 1529 VN_KNOTE(dvp, NOTE_WRITE); 1530 vput(dvp); 1531 1532 return error; 1533 } 1534 1535 /* --------------------------------------------------------------------- */ 1536 1537 static int 1538 udf_do_symlink(struct udf_node *udf_node, char *target) 1539 { 1540 struct pathcomp pathcomp; 1541 uint8_t *pathbuf, *pathpos, *compnamepos; 1542 char *mntonname; 1543 int pathlen, len, compnamelen, mntonnamelen; 1544 int error; 1545 1546 /* process `target' to an UDF structure */ 1547 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1548 pathpos = pathbuf; 1549 pathlen = 0; 1550 1551 if (*target == '/') { 1552 /* symlink starts from the root */ 1553 len = UDF_PATH_COMP_SIZE; 1554 memset(&pathcomp, 0, len); 1555 pathcomp.type = UDF_PATH_COMP_ROOT; 1556 1557 /* check if its mount-point relative! */ 1558 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1559 mntonnamelen = strlen(mntonname); 1560 if (strlen(target) >= mntonnamelen) { 1561 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1562 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1563 target += mntonnamelen; 1564 } 1565 } else { 1566 target++; 1567 } 1568 1569 memcpy(pathpos, &pathcomp, len); 1570 pathpos += len; 1571 pathlen += len; 1572 } 1573 1574 error = 0; 1575 while (*target) { 1576 /* ignore multiple '/' */ 1577 while (*target == '/') { 1578 target++; 1579 } 1580 if (!*target) 1581 break; 1582 1583 /* extract component name */ 1584 compnamelen = 0; 1585 compnamepos = target; 1586 while ((*target) && (*target != '/')) { 1587 target++; 1588 compnamelen++; 1589 } 1590 1591 /* just trunc if too long ?? (security issue) */ 1592 if (compnamelen >= 127) { 1593 error = ENAMETOOLONG; 1594 break; 1595 } 1596 1597 /* convert unix name to UDF name */ 1598 len = sizeof(struct pathcomp); 1599 memset(&pathcomp, 0, len); 1600 pathcomp.type = UDF_PATH_COMP_NAME; 1601 len = UDF_PATH_COMP_SIZE; 1602 1603 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1604 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1605 if ((compnamelen == 1) && (*compnamepos == '.')) 1606 pathcomp.type = UDF_PATH_COMP_CURDIR; 1607 1608 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1609 unix_to_udf_name( 1610 (char *) &pathcomp.ident, &pathcomp.l_ci, 1611 compnamepos, compnamelen, 1612 &udf_node->ump->logical_vol->desc_charset); 1613 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1614 } 1615 1616 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1617 error = ENAMETOOLONG; 1618 break; 1619 } 1620 1621 memcpy(pathpos, &pathcomp, len); 1622 pathpos += len; 1623 pathlen += len; 1624 } 1625 1626 if (error) { 1627 /* aparently too big */ 1628 free(pathbuf, M_UDFTEMP); 1629 return error; 1630 } 1631 1632 error = udf_grow_node(udf_node, pathlen); 1633 if (error) { 1634 /* failed to pregrow node */ 1635 free(pathbuf, M_UDFTEMP); 1636 return error; 1637 } 1638 1639 /* write out structure on the new file */ 1640 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1641 pathbuf, pathlen, 0, 1642 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1643 FSCRED, NULL, NULL); 1644 if (error) { 1645 /* failed to write out symlink contents */ 1646 free(pathbuf, M_UDFTEMP); 1647 return error; 1648 } 1649 1650 return 0; 1651 } 1652 1653 1654 int 1655 udf_symlink(void *v) 1656 { 1657 struct vop_symlink_args /* { 1658 struct vnode *a_dvp; 1659 struct vnode **a_vpp; 1660 struct componentname *a_cnp; 1661 struct vattr *a_vap; 1662 char *a_target; 1663 } */ *ap = v; 1664 struct vnode *dvp = ap->a_dvp; 1665 struct vnode **vpp = ap->a_vpp; 1666 struct vattr *vap = ap->a_vap; 1667 struct componentname *cnp = ap->a_cnp; 1668 struct udf_node *dir_node; 1669 struct udf_node *udf_node; 1670 int error; 1671 1672 DPRINTF(CALL, ("udf_symlink called\n")); 1673 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1674 error = udf_create_node(dvp, vpp, vap, cnp); 1675 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1676 if (!error) { 1677 dir_node = VTOI(dvp); 1678 udf_node = VTOI(*vpp); 1679 KASSERT(udf_node); 1680 error = udf_do_symlink(udf_node, ap->a_target); 1681 if (error) { 1682 /* remove node */ 1683 udf_shrink_node(udf_node, 0); 1684 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1685 } 1686 } 1687 if (error || !(cnp->cn_flags & SAVESTART)) 1688 PNBUF_PUT(cnp->cn_pnbuf); 1689 vput(dvp); 1690 return error; 1691 } 1692 1693 /* --------------------------------------------------------------------- */ 1694 1695 int 1696 udf_readlink(void *v) 1697 { 1698 struct vop_readlink_args /* { 1699 struct vnode *a_vp; 1700 struct uio *a_uio; 1701 kauth_cred_t a_cred; 1702 } */ *ap = v; 1703 struct vnode *vp = ap->a_vp; 1704 struct uio *uio = ap->a_uio; 1705 kauth_cred_t cred = ap->a_cred; 1706 struct udf_node *udf_node; 1707 struct pathcomp pathcomp; 1708 struct vattr vattr; 1709 uint8_t *pathbuf, *targetbuf, *tmpname; 1710 uint8_t *pathpos, *targetpos; 1711 char *mntonname; 1712 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1713 int first, error; 1714 1715 DPRINTF(CALL, ("udf_readlink called\n")); 1716 1717 udf_node = VTOI(vp); 1718 error = VOP_GETATTR(vp, &vattr, cred); 1719 if (error) 1720 return error; 1721 1722 /* claim temporary buffers for translation */ 1723 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1724 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1725 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1726 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1727 memset(targetbuf, 0, PATH_MAX); 1728 1729 /* read contents of file in our temporary buffer */ 1730 error = vn_rdwr(UIO_READ, udf_node->vnode, 1731 pathbuf, vattr.va_size, 0, 1732 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1733 FSCRED, NULL, NULL); 1734 if (error) { 1735 /* failed to read in symlink contents */ 1736 free(pathbuf, M_UDFTEMP); 1737 free(targetbuf, M_UDFTEMP); 1738 free(tmpname, M_UDFTEMP); 1739 return error; 1740 } 1741 1742 /* convert to a unix path */ 1743 pathpos = pathbuf; 1744 pathlen = 0; 1745 targetpos = targetbuf; 1746 targetlen = PATH_MAX; 1747 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1748 mntonnamelen = strlen(mntonname); 1749 1750 error = 0; 1751 first = 1; 1752 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1753 len = UDF_PATH_COMP_SIZE; 1754 memcpy(&pathcomp, pathpos, len); 1755 l_ci = pathcomp.l_ci; 1756 switch (pathcomp.type) { 1757 case UDF_PATH_COMP_ROOT : 1758 /* XXX should check for l_ci; bugcompatible now */ 1759 if ((targetlen < 1) || !first) { 1760 error = EINVAL; 1761 break; 1762 } 1763 *targetpos++ = '/'; targetlen--; 1764 break; 1765 case UDF_PATH_COMP_MOUNTROOT : 1766 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1767 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1768 error = EINVAL; 1769 break; 1770 } 1771 memcpy(targetpos, mntonname, mntonnamelen); 1772 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1773 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1774 /* more follows, so must be directory */ 1775 *targetpos++ = '/'; targetlen--; 1776 } 1777 break; 1778 case UDF_PATH_COMP_PARENTDIR : 1779 /* XXX should check for l_ci; bugcompatible now */ 1780 if (targetlen < 3) { 1781 error = EINVAL; 1782 break; 1783 } 1784 *targetpos++ = '.'; targetlen--; 1785 *targetpos++ = '.'; targetlen--; 1786 *targetpos++ = '/'; targetlen--; 1787 break; 1788 case UDF_PATH_COMP_CURDIR : 1789 /* XXX should check for l_ci; bugcompatible now */ 1790 if (targetlen < 2) { 1791 error = EINVAL; 1792 break; 1793 } 1794 *targetpos++ = '.'; targetlen--; 1795 *targetpos++ = '/'; targetlen--; 1796 break; 1797 case UDF_PATH_COMP_NAME : 1798 if (l_ci == 0) { 1799 error = EINVAL; 1800 break; 1801 } 1802 memset(tmpname, 0, PATH_MAX); 1803 memcpy(&pathcomp, pathpos, len + l_ci); 1804 udf_to_unix_name(tmpname, MAXPATHLEN, 1805 pathcomp.ident, l_ci, 1806 &udf_node->ump->logical_vol->desc_charset); 1807 namelen = strlen(tmpname); 1808 if (targetlen < namelen + 1) { 1809 error = EINVAL; 1810 break; 1811 } 1812 memcpy(targetpos, tmpname, namelen); 1813 targetpos += namelen; targetlen -= namelen; 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 default : 1820 error = EINVAL; 1821 break; 1822 } 1823 first = 0; 1824 if (error) 1825 break; 1826 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1827 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1828 1829 } 1830 /* all processed? */ 1831 if (vattr.va_size - pathlen > 0) 1832 error = EINVAL; 1833 1834 /* uiomove() to destination */ 1835 if (!error) 1836 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1837 1838 free(pathbuf, M_UDFTEMP); 1839 free(targetbuf, M_UDFTEMP); 1840 free(tmpname, M_UDFTEMP); 1841 1842 return error; 1843 } 1844 1845 /* --------------------------------------------------------------------- */ 1846 1847 /* note: i tried to follow the logics of the tmpfs rename code */ 1848 int 1849 udf_rename(void *v) 1850 { 1851 struct vop_rename_args /* { 1852 struct vnode *a_fdvp; 1853 struct vnode *a_fvp; 1854 struct componentname *a_fcnp; 1855 struct vnode *a_tdvp; 1856 struct vnode *a_tvp; 1857 struct componentname *a_tcnp; 1858 } */ *ap = v; 1859 struct vnode *tvp = ap->a_tvp; 1860 struct vnode *tdvp = ap->a_tdvp; 1861 struct vnode *fvp = ap->a_fvp; 1862 struct vnode *fdvp = ap->a_fdvp; 1863 struct componentname *tcnp = ap->a_tcnp; 1864 struct componentname *fcnp = ap->a_fcnp; 1865 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1866 struct vattr fvap, tvap; 1867 int error; 1868 1869 DPRINTF(CALL, ("udf_rename called\n")); 1870 1871 /* disallow cross-device renames */ 1872 if (fvp->v_mount != tdvp->v_mount || 1873 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1874 error = EXDEV; 1875 goto out_unlocked; 1876 } 1877 1878 fnode = VTOI(fvp); 1879 fdnode = VTOI(fdvp); 1880 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1881 tdnode = VTOI(tdvp); 1882 1883 /* lock our source dir */ 1884 if (fdnode != tdnode) { 1885 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1886 if (error != 0) 1887 goto out_unlocked; 1888 } 1889 1890 /* get info about the node to be moved */ 1891 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1892 KASSERT(error == 0); 1893 1894 /* check when to delete the old already existing entry */ 1895 if (tvp) { 1896 /* get info about the node to be moved to */ 1897 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1898 KASSERT(error == 0); 1899 1900 /* if both dirs, make sure the destination is empty */ 1901 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1902 if (tvap.va_nlink > 2) { 1903 error = ENOTEMPTY; 1904 goto out; 1905 } 1906 } 1907 /* if moving dir, make sure destination is dir too */ 1908 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1909 error = ENOTDIR; 1910 goto out; 1911 } 1912 /* if we're moving a non-directory, make sure dest is no dir */ 1913 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1914 error = EISDIR; 1915 goto out; 1916 } 1917 } 1918 1919 /* dont allow renaming directories acros directory for now */ 1920 if (fdnode != tdnode) { 1921 if (fvp->v_type == VDIR) { 1922 error = EINVAL; 1923 goto out; 1924 } 1925 } 1926 1927 /* remove existing entry if present */ 1928 if (tvp) 1929 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1930 1931 /* create new directory entry for the node */ 1932 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1933 if (error) 1934 goto out; 1935 1936 /* unlink old directory entry for the node, if failing, unattach new */ 1937 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1938 if (error) 1939 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1940 1941 out: 1942 if (fdnode != tdnode) 1943 VOP_UNLOCK(fdvp, 0); 1944 1945 out_unlocked: 1946 VOP_ABORTOP(tdvp, tcnp); 1947 if (tdvp == tvp) 1948 vrele(tdvp); 1949 else 1950 vput(tdvp); 1951 if (tvp) 1952 vput(tvp); 1953 VOP_ABORTOP(fdvp, fcnp); 1954 1955 /* release source nodes. */ 1956 vrele(fdvp); 1957 vrele(fvp); 1958 1959 return error; 1960 } 1961 1962 /* --------------------------------------------------------------------- */ 1963 1964 int 1965 udf_remove(void *v) 1966 { 1967 struct vop_remove_args /* { 1968 struct vnode *a_dvp; 1969 struct vnode *a_vp; 1970 struct componentname *a_cnp; 1971 } */ *ap = v; 1972 struct vnode *dvp = ap->a_dvp; 1973 struct vnode *vp = ap->a_vp; 1974 struct componentname *cnp = ap->a_cnp; 1975 struct udf_node *dir_node = VTOI(dvp);; 1976 struct udf_node *udf_node = VTOI(vp); 1977 struct udf_mount *ump = dir_node->ump; 1978 int error; 1979 1980 DPRINTF(CALL, ("udf_remove called\n")); 1981 if (vp->v_type != VDIR) { 1982 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1983 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1984 } else { 1985 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1986 error = EPERM; 1987 } 1988 1989 if (error == 0) { 1990 VN_KNOTE(vp, NOTE_DELETE); 1991 VN_KNOTE(dvp, NOTE_WRITE); 1992 } 1993 1994 if (dvp == vp) 1995 vrele(vp); 1996 else 1997 vput(vp); 1998 vput(dvp); 1999 2000 return error; 2001 } 2002 2003 /* --------------------------------------------------------------------- */ 2004 2005 int 2006 udf_rmdir(void *v) 2007 { 2008 struct vop_rmdir_args /* { 2009 struct vnode *a_dvp; 2010 struct vnode *a_vp; 2011 struct componentname *a_cnp; 2012 } */ *ap = v; 2013 struct vnode *vp = ap->a_vp; 2014 struct vnode *dvp = ap->a_dvp; 2015 struct componentname *cnp = ap->a_cnp; 2016 struct udf_node *dir_node = VTOI(dvp);; 2017 struct udf_node *udf_node = VTOI(vp); 2018 struct udf_mount *ump = dir_node->ump; 2019 int refcnt, error; 2020 2021 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2022 2023 /* don't allow '.' to be deleted */ 2024 if (dir_node == udf_node) { 2025 vrele(dvp); 2026 vput(vp); 2027 return EINVAL; 2028 } 2029 2030 /* check to see if the directory is empty */ 2031 error = 0; 2032 if (dir_node->fe) { 2033 refcnt = udf_rw16(udf_node->fe->link_cnt); 2034 } else { 2035 refcnt = udf_rw16(udf_node->efe->link_cnt); 2036 } 2037 if (refcnt > 1) { 2038 /* NOT empty */ 2039 vput(dvp); 2040 vput(vp); 2041 return ENOTEMPTY; 2042 } 2043 2044 /* detach the node from the directory */ 2045 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2046 if (error == 0) { 2047 cache_purge(vp); 2048 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2049 VN_KNOTE(vp, NOTE_DELETE); 2050 } 2051 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2052 2053 /* unput the nodes and exit */ 2054 vput(dvp); 2055 vput(vp); 2056 2057 return error; 2058 } 2059 2060 /* --------------------------------------------------------------------- */ 2061 2062 int 2063 udf_fsync(void *v) 2064 { 2065 struct vop_fsync_args /* { 2066 struct vnode *a_vp; 2067 kauth_cred_t a_cred; 2068 int a_flags; 2069 off_t offlo; 2070 off_t offhi; 2071 struct proc *a_p; 2072 } */ *ap = v; 2073 struct vnode *vp = ap->a_vp; 2074 struct udf_node *udf_node = VTOI(vp); 2075 int error, flags, wait; 2076 2077 DPRINTF(STRATEGY, ("udf_fsync called : %s, %s\n", 2078 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2079 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2080 2081 /* flush data and wait for it when requested */ 2082 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2083 vflushbuf(vp, wait); 2084 2085 if (udf_node == NULL) { 2086 printf("udf_fsync() called on NULL udf_node!\n"); 2087 return 0; 2088 } 2089 if (vp->v_tag != VT_UDF) { 2090 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2091 return 0; 2092 } 2093 2094 /* set our times */ 2095 udf_itimes(udf_node, NULL, NULL, NULL); 2096 2097 /* if called when mounted readonly, never write back */ 2098 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2099 return 0; 2100 2101 /* if only data is requested, return */ 2102 if (ap->a_flags & FSYNC_DATAONLY) 2103 return 0; 2104 2105 /* check if the node is dirty 'enough'*/ 2106 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2107 if (flags == 0) 2108 return 0; 2109 2110 /* if we don't have to wait, check for IO pending */ 2111 if (!wait) { 2112 if (vp->v_numoutput > 0) { 2113 DPRINTF(NODE, ("udf_fsync: rejecting on v_numoutput\n")); 2114 return 0; 2115 } 2116 if (udf_node->outstanding_bufs > 0) { 2117 DPRINTF(NODE, ("udf_fsync: rejecting on outstanding_bufs\n")); 2118 return 0; 2119 } 2120 if (udf_node->outstanding_nodedscr > 0) { 2121 DPRINTF(NODE, ("udf_fsync: rejecting on outstanding_nodedscr\n")); 2122 return 0; 2123 } 2124 } 2125 2126 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2127 if (wait) { 2128 DPRINTF(SYNC, ("udf_fsync, waiting\n")); 2129 mutex_enter(&vp->v_interlock); 2130 while (vp->v_numoutput) { 2131 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2132 } 2133 mutex_exit(&vp->v_interlock); 2134 DPRINTF(SYNC, ("udf_fsync: fin wait\n")); 2135 } 2136 2137 /* write out node and wait for it if requested */ 2138 error = udf_writeout_node(udf_node, wait); 2139 if (error) 2140 return error; 2141 2142 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2143 2144 return 0; 2145 } 2146 2147 /* --------------------------------------------------------------------- */ 2148 2149 int 2150 udf_advlock(void *v) 2151 { 2152 struct vop_advlock_args /* { 2153 struct vnode *a_vp; 2154 void *a_id; 2155 int a_op; 2156 struct flock *a_fl; 2157 int a_flags; 2158 } */ *ap = v; 2159 struct vnode *vp = ap->a_vp; 2160 struct udf_node *udf_node = VTOI(vp); 2161 struct file_entry *fe; 2162 struct extfile_entry *efe; 2163 uint64_t file_size; 2164 2165 DPRINTF(LOCKING, ("udf_advlock called\n")); 2166 2167 /* get directory filesize */ 2168 if (udf_node->fe) { 2169 fe = udf_node->fe; 2170 file_size = udf_rw64(fe->inf_len); 2171 } else { 2172 assert(udf_node->efe); 2173 efe = udf_node->efe; 2174 file_size = udf_rw64(efe->inf_len); 2175 } 2176 2177 return lf_advlock(ap, &udf_node->lockf, file_size); 2178 } 2179 2180 /* --------------------------------------------------------------------- */ 2181 2182 2183 /* Global vfs vnode data structures for udfs */ 2184 int (**udf_vnodeop_p) __P((void *)); 2185 2186 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2187 { &vop_default_desc, vn_default_error }, 2188 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2189 { &vop_create_desc, udf_create }, /* create */ 2190 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2191 { &vop_open_desc, udf_open }, /* open */ 2192 { &vop_close_desc, udf_close }, /* close */ 2193 { &vop_access_desc, udf_access }, /* access */ 2194 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2195 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2196 { &vop_read_desc, udf_read }, /* read */ 2197 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2198 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2199 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2200 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2201 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2202 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2203 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2204 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2205 { &vop_seek_desc, genfs_seek }, /* seek */ 2206 { &vop_remove_desc, udf_remove }, /* remove */ 2207 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2208 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2209 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2210 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2211 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2212 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2213 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2214 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2215 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2216 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2217 { &vop_lock_desc, genfs_lock }, /* lock */ 2218 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2219 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2220 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2221 /* { &vop_print_desc, udf_print }, */ /* print */ 2222 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2223 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2224 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2225 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2226 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2227 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2228 { NULL, NULL } 2229 }; 2230 2231 2232 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2233 &udf_vnodeop_p, udf_vnodeop_entries 2234 }; 2235 2236
Indexes created Thu Oct 02 14:10:14 GMT 2025