udf_vnops.c revision 1.30.4.6
1 /* $NetBSD: udf_vnops.c,v 1.30.4.6 2009/03/24 20:29:53 snj 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 1.30.4.6 2009/03/24 20:29:53 snj 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 void *win; 190 int error; 191 int flags; 192 193 /* 194 * XXX reading from extended attributes not yet implemented. FreeBSD 195 * has it in mind to forward the IO_EXT read call to the 196 * VOP_READEXTATTR(). 197 */ 198 199 DPRINTF(READ, ("udf_read called\n")); 200 201 /* can this happen? some filingsystems have this check */ 202 if (uio->uio_offset < 0) 203 return EINVAL; 204 if (uio->uio_resid == 0) 205 return 0; 206 207 /* protect against rogue programs reading raw directories and links */ 208 if ((ioflag & IO_ALTSEMANTICS) == 0) { 209 if (vp->v_type == VDIR) 210 return EISDIR; 211 /* all but regular files just give EINVAL */ 212 if (vp->v_type != VREG) 213 return EINVAL; 214 } 215 216 assert(udf_node); 217 assert(udf_node->fe || udf_node->efe); 218 219 /* get file/directory filesize */ 220 if (udf_node->fe) { 221 fe = udf_node->fe; 222 file_size = udf_rw64(fe->inf_len); 223 } else { 224 assert(udf_node->efe); 225 efe = udf_node->efe; 226 file_size = udf_rw64(efe->inf_len); 227 } 228 229 /* read contents using buffercache */ 230 uobj = &vp->v_uobj; 231 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 232 error = 0; 233 while (uio->uio_resid > 0) { 234 /* reached end? */ 235 if (file_size <= uio->uio_offset) 236 break; 237 238 /* maximise length to file extremity */ 239 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 240 if (len == 0) 241 break; 242 243 /* ubc, here we come, prepare to trap */ 244 win = ubc_alloc(uobj, uio->uio_offset, &len, 245 advice, UBC_READ); 246 error = uiomove(win, len, uio); 247 ubc_release(win, flags); 248 if (error) 249 break; 250 } 251 252 /* note access time unless not requested */ 253 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 254 udf_node->i_flags |= IN_ACCESS; 255 if ((ioflag & IO_SYNC) == IO_SYNC) 256 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 257 } 258 259 return error; 260 } 261 262 /* --------------------------------------------------------------------- */ 263 264 int 265 udf_write(void *v) 266 { 267 struct vop_write_args /* { 268 struct vnode *a_vp; 269 struct uio *a_uio; 270 int a_ioflag; 271 kauth_cred_t a_cred; 272 } */ *ap = v; 273 struct vnode *vp = ap->a_vp; 274 struct uio *uio = ap->a_uio; 275 int ioflag = ap->a_ioflag; 276 int advice = IO_ADV_DECODE(ap->a_ioflag); 277 struct uvm_object *uobj; 278 struct udf_node *udf_node = VTOI(vp); 279 struct file_entry *fe; 280 struct extfile_entry *efe; 281 void *win; 282 uint64_t file_size, old_size, old_offset; 283 vsize_t len; 284 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 285 int error; 286 int flags, resid, extended; 287 288 /* 289 * XXX writing to extended attributes not yet implemented. FreeBSD has 290 * it in mind to forward the IO_EXT read call to the 291 * VOP_READEXTATTR(). 292 */ 293 294 DPRINTF(WRITE, ("udf_write called\n")); 295 296 /* can this happen? some filingsystems have this check */ 297 if (uio->uio_offset < 0) 298 return EINVAL; 299 if (uio->uio_resid == 0) 300 return 0; 301 302 /* protect against rogue programs writing raw directories or links */ 303 if ((ioflag & IO_ALTSEMANTICS) == 0) { 304 if (vp->v_type == VDIR) 305 return EISDIR; 306 /* all but regular files just give EINVAL for now */ 307 if (vp->v_type != VREG) 308 return EINVAL; 309 } 310 311 assert(udf_node); 312 assert(udf_node->fe || udf_node->efe); 313 314 /* get file/directory filesize */ 315 if (udf_node->fe) { 316 fe = udf_node->fe; 317 file_size = udf_rw64(fe->inf_len); 318 } else { 319 assert(udf_node->efe); 320 efe = udf_node->efe; 321 file_size = udf_rw64(efe->inf_len); 322 } 323 old_size = file_size; 324 325 /* if explicitly asked to append, uio_offset can be wrong? */ 326 if (ioflag & IO_APPEND) 327 uio->uio_offset = file_size; 328 329 extended = (uio->uio_offset + uio->uio_resid > file_size); 330 if (extended) { 331 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 332 file_size, uio->uio_offset + uio->uio_resid)); 333 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 334 if (error) 335 return error; 336 file_size = uio->uio_offset + uio->uio_resid; 337 } 338 339 /* write contents using buffercache */ 340 uobj = &vp->v_uobj; 341 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 342 resid = uio->uio_resid; 343 error = 0; 344 345 uvm_vnp_setwritesize(vp, file_size); 346 old_offset = uio->uio_offset; 347 while (uio->uio_resid > 0) { 348 /* maximise length to file extremity */ 349 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 350 if (len == 0) 351 break; 352 353 /* ubc, here we come, prepare to trap */ 354 win = ubc_alloc(uobj, uio->uio_offset, &len, 355 advice, UBC_WRITE); 356 error = uiomove(win, len, uio); 357 ubc_release(win, flags); 358 if (error) 359 break; 360 361 /* 362 * flush what we just wrote if necessary. 363 * XXXUBC simplistic async flushing. 364 * 365 * this one works on page sizes. Directories are excluded 366 * since its file data that we want to purge. 367 */ 368 if (!async && (vp->v_type != VDIR) && 369 (uio->uio_offset - old_offset >= PAGE_SIZE)) { 370 mutex_enter(&vp->v_interlock); 371 error = VOP_PUTPAGES(vp, 372 ptoa(atop(old_offset)), 373 ptoa(atop(uio->uio_offset + PAGE_SIZE-1)), 374 PGO_CLEANIT); 375 old_offset = uio->uio_offset; 376 } 377 } 378 uvm_vnp_setsize(vp, file_size); 379 380 /* mark node changed and request update */ 381 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 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, NOCRED); 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, from, sectors; 468 int error; 469 470 DPRINTF(STRATEGY, ("udf_strategy called\n")); 471 472 /* check if we ought to be here */ 473 if (vp->v_type == VBLK || vp->v_type == VCHR) 474 panic("udf_strategy: spec"); 475 476 /* only filebuffers ought to be read/write by this, no descriptors */ 477 assert(bp->b_blkno >= 0); 478 479 /* get sector size */ 480 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 481 482 /* calculate sector to start from */ 483 from = bp->b_blkno; 484 485 /* calculate length to fetch/store in sectors */ 486 sectors = bp->b_bcount / lb_size; 487 assert(bp->b_bcount > 0); 488 489 /* NEVER assume later that this buffer is already translated */ 490 /* bp->b_lblkno = bp->b_blkno; */ 491 492 /* check assertions: we OUGHT to always get multiples of this */ 493 assert(sectors * lb_size == bp->b_bcount); 494 495 /* issue buffer */ 496 error = 0; 497 if (bp->b_flags & B_READ) { 498 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 499 ", sector %d for %d sectors\n", 500 vp, bp, bp->b_blkno, from, sectors)); 501 502 /* read buffer from the udf_node, translate vtop on the way*/ 503 udf_read_filebuf(udf_node, bp); 504 } else { 505 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 506 ", sector %d for %d sectors\n", 507 vp, bp, bp->b_blkno, from, sectors)); 508 509 /* write buffer to the udf_node, translate vtop on the way*/ 510 udf_write_filebuf(udf_node, bp); 511 } 512 513 return bp->b_error; 514 } 515 516 /* --------------------------------------------------------------------- */ 517 518 int 519 udf_readdir(void *v) 520 { 521 struct vop_readdir_args /* { 522 struct vnode *a_vp; 523 struct uio *a_uio; 524 kauth_cred_t a_cred; 525 int *a_eofflag; 526 off_t **a_cookies; 527 int *a_ncookies; 528 } */ *ap = v; 529 struct uio *uio = ap->a_uio; 530 struct vnode *vp = ap->a_vp; 531 struct udf_node *udf_node = VTOI(vp); 532 struct file_entry *fe; 533 struct extfile_entry *efe; 534 struct fileid_desc *fid; 535 struct dirent *dirent; 536 uint64_t file_size, diroffset, transoffset; 537 uint32_t lb_size; 538 int error; 539 540 DPRINTF(READDIR, ("udf_readdir called\n")); 541 542 /* This operation only makes sense on directory nodes. */ 543 if (vp->v_type != VDIR) 544 return ENOTDIR; 545 546 /* get directory filesize */ 547 if (udf_node->fe) { 548 fe = udf_node->fe; 549 file_size = udf_rw64(fe->inf_len); 550 } else { 551 assert(udf_node->efe); 552 efe = udf_node->efe; 553 file_size = udf_rw64(efe->inf_len); 554 } 555 556 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 557 558 /* 559 * Add `.' pseudo entry if at offset zero since its not in the fid 560 * stream 561 */ 562 if (uio->uio_offset == 0) { 563 DPRINTF(READDIR, ("\t'.' inserted\n")); 564 strcpy(dirent->d_name, "."); 565 dirent->d_fileno = udf_calchash(&udf_node->loc); 566 dirent->d_type = DT_DIR; 567 dirent->d_namlen = strlen(dirent->d_name); 568 dirent->d_reclen = _DIRENT_SIZE(dirent); 569 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 570 571 /* mark with magic value that we have done the dummy */ 572 uio->uio_offset = UDF_DIRCOOKIE_DOT; 573 } 574 575 /* we are called just as long as we keep on pushing data in */ 576 error = 0; 577 if (uio->uio_offset < file_size) { 578 /* allocate temporary space for fid */ 579 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 580 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 581 582 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 583 uio->uio_offset = 0; 584 585 diroffset = uio->uio_offset; 586 transoffset = diroffset; 587 while (diroffset < file_size) { 588 DPRINTF(READDIR, ("\tread in fid stream\n")); 589 /* transfer a new fid/dirent */ 590 error = udf_read_fid_stream(vp, &diroffset, 591 fid, dirent); 592 DPRINTFIF(READDIR, error, ("read error in read fid " 593 "stream : %d\n", error)); 594 if (error) 595 break; 596 597 /* 598 * If there isn't enough space in the uio to return a 599 * whole dirent, break off read 600 */ 601 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 602 break; 603 604 /* remember the last entry we transfered */ 605 transoffset = diroffset; 606 607 /* skip deleted entries */ 608 if (fid->file_char & UDF_FILE_CHAR_DEL) 609 continue; 610 611 /* skip not visible files */ 612 if (fid->file_char & UDF_FILE_CHAR_VIS) 613 continue; 614 615 /* copy dirent to the caller */ 616 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 617 dirent->d_name, dirent->d_type)); 618 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 619 } 620 621 /* pass on last transfered offset */ 622 uio->uio_offset = transoffset; 623 free(fid, M_UDFTEMP); 624 } 625 626 if (ap->a_eofflag) 627 *ap->a_eofflag = (uio->uio_offset >= file_size); 628 629 #ifdef DEBUG 630 if (udf_verbose & UDF_DEBUG_READDIR) { 631 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 632 if (ap->a_eofflag) 633 printf("returning EOF ? %d\n", *ap->a_eofflag); 634 if (error) 635 printf("readdir returning error %d\n", error); 636 } 637 #endif 638 639 free(dirent, M_UDFTEMP); 640 return error; 641 } 642 643 /* --------------------------------------------------------------------- */ 644 645 int 646 udf_lookup(void *v) 647 { 648 struct vop_lookup_args /* { 649 struct vnode *a_dvp; 650 struct vnode **a_vpp; 651 struct componentname *a_cnp; 652 } */ *ap = v; 653 struct vnode *dvp = ap->a_dvp; 654 struct vnode **vpp = ap->a_vpp; 655 struct componentname *cnp = ap->a_cnp; 656 struct udf_node *dir_node, *res_node; 657 struct udf_mount *ump; 658 struct long_ad icb_loc; 659 const char *name; 660 int namelen, nameiop, islastcn, mounted_ro; 661 int vnodetp; 662 int error, found; 663 664 dir_node = VTOI(dvp); 665 ump = dir_node->ump; 666 *vpp = NULL; 667 668 DPRINTF(LOOKUP, ("udf_lookup called\n")); 669 670 /* simplify/clarification flags */ 671 nameiop = cnp->cn_nameiop; 672 islastcn = cnp->cn_flags & ISLASTCN; 673 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 674 675 /* check exec/dirread permissions first */ 676 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 677 if (error) 678 return error; 679 680 DPRINTF(LOOKUP, ("\taccess ok\n")); 681 682 /* 683 * If requesting a modify on the last path element on a read-only 684 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 685 */ 686 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 687 return EROFS; 688 689 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 690 cnp->cn_nameptr)); 691 /* look in the nami cache; returns 0 on success!! */ 692 error = cache_lookup(dvp, vpp, cnp); 693 if (error >= 0) 694 return error; 695 696 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 697 698 /* 699 * Obviously, the file is not (anymore) in the namecache, we have to 700 * search for it. There are three basic cases: '.', '..' and others. 701 * 702 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 703 */ 704 error = 0; 705 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 706 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 707 /* special case 1 '.' */ 708 VREF(dvp); 709 *vpp = dvp; 710 /* done */ 711 } else if (cnp->cn_flags & ISDOTDOT) { 712 /* special case 2 '..' */ 713 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 714 715 /* get our node */ 716 name = ".."; 717 namelen = 2; 718 error = udf_lookup_name_in_dir(dvp, name, namelen, 719 &icb_loc, &found); 720 if (error) 721 goto out; 722 if (!found) 723 error = ENOENT; 724 725 /* first unlock parent */ 726 VOP_UNLOCK(dvp, 0); 727 728 if (error == 0) { 729 DPRINTF(LOOKUP, ("\tfound '..'\n")); 730 /* try to create/reuse the node */ 731 error = udf_get_node(ump, &icb_loc, &res_node); 732 733 if (!error) { 734 DPRINTF(LOOKUP, 735 ("\tnode retrieved/created OK\n")); 736 *vpp = res_node->vnode; 737 } 738 } 739 740 /* try to relock parent */ 741 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 742 } else { 743 DPRINTF(LOOKUP, ("\tlookup file\n")); 744 /* all other files */ 745 /* lookup filename in the directory; location icb_loc */ 746 name = cnp->cn_nameptr; 747 namelen = cnp->cn_namelen; 748 error = udf_lookup_name_in_dir(dvp, name, namelen, 749 &icb_loc, &found); 750 if (error) 751 goto out; 752 if (!found) { 753 DPRINTF(LOOKUP, ("\tNOT found\n")); 754 /* 755 * UGH, didn't find name. If we're creating or 756 * renaming on the last name this is OK and we ought 757 * to return EJUSTRETURN if its allowed to be created. 758 */ 759 error = ENOENT; 760 if (islastcn && 761 (nameiop == CREATE || nameiop == RENAME)) 762 error = 0; 763 if (!error) { 764 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 765 if (!error) { 766 /* keep the component name */ 767 cnp->cn_flags |= SAVENAME; 768 error = EJUSTRETURN; 769 } 770 } 771 /* done */ 772 } else { 773 /* try to create/reuse the node */ 774 error = udf_get_node(ump, &icb_loc, &res_node); 775 if (!error) { 776 /* 777 * If we are not at the last path component 778 * and found a non-directory or non-link entry 779 * (which may itself be pointing to a 780 * directory), raise an error. 781 */ 782 vnodetp = res_node->vnode->v_type; 783 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 784 if (!islastcn) 785 error = ENOTDIR; 786 } 787 788 } 789 if (!error) { 790 *vpp = res_node->vnode; 791 } 792 } 793 } 794 795 out: 796 /* 797 * Store result in the cache if requested. If we are creating a file, 798 * the file might not be found and thus putting it into the namecache 799 * might be seen as negative caching. 800 */ 801 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 802 cache_enter(dvp, *vpp, cnp); 803 804 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 805 806 return error; 807 } 808 809 /* --------------------------------------------------------------------- */ 810 811 int 812 udf_getattr(void *v) 813 { 814 struct vop_getattr_args /* { 815 struct vnode *a_vp; 816 struct vattr *a_vap; 817 kauth_cred_t a_cred; 818 struct lwp *a_l; 819 } */ *ap = v; 820 struct vnode *vp = ap->a_vp; 821 struct udf_node *udf_node = VTOI(vp); 822 struct udf_mount *ump = udf_node->ump; 823 struct file_entry *fe = udf_node->fe; 824 struct extfile_entry *efe = udf_node->efe; 825 struct filetimes_extattr_entry *ft_extattr; 826 struct device_extattr_entry *devattr; 827 struct vattr *vap = ap->a_vap; 828 struct timestamp *atime, *mtime, *attrtime, *creatime; 829 uint64_t filesize, blkssize; 830 uint32_t nlink; 831 uint32_t offset, a_l; 832 uint8_t *filedata; 833 uid_t uid; 834 gid_t gid; 835 int error; 836 837 DPRINTF(CALL, ("udf_getattr called\n")); 838 839 /* update times before we returning values */ 840 udf_itimes(udf_node, NULL, NULL, NULL); 841 842 /* get descriptor information */ 843 if (fe) { 844 nlink = udf_rw16(fe->link_cnt); 845 uid = (uid_t)udf_rw32(fe->uid); 846 gid = (gid_t)udf_rw32(fe->gid); 847 filesize = udf_rw64(fe->inf_len); 848 blkssize = udf_rw64(fe->logblks_rec); 849 atime = &fe->atime; 850 mtime = &fe->mtime; 851 attrtime = &fe->attrtime; 852 filedata = fe->data; 853 854 /* initial guess */ 855 creatime = mtime; 856 857 /* check our extended attribute if present */ 858 error = udf_extattr_search_intern(udf_node, 859 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 860 if (!error) { 861 ft_extattr = (struct filetimes_extattr_entry *) 862 (filedata + offset); 863 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 864 creatime = &ft_extattr->times[0]; 865 } 866 } else { 867 assert(udf_node->efe); 868 nlink = udf_rw16(efe->link_cnt); 869 uid = (uid_t)udf_rw32(efe->uid); 870 gid = (gid_t)udf_rw32(efe->gid); 871 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 872 blkssize = udf_rw64(efe->logblks_rec); 873 atime = &efe->atime; 874 mtime = &efe->mtime; 875 attrtime = &efe->attrtime; 876 creatime = &efe->ctime; 877 filedata = efe->data; 878 } 879 880 /* do the uid/gid translation game */ 881 if (uid == (uid_t) -1) 882 uid = ump->mount_args.anon_uid; 883 if (gid == (gid_t) -1) 884 gid = ump->mount_args.anon_gid; 885 886 /* fill in struct vattr with values from the node */ 887 VATTR_NULL(vap); 888 vap->va_type = vp->v_type; 889 vap->va_mode = udf_getaccessmode(udf_node); 890 vap->va_nlink = nlink; 891 vap->va_uid = uid; 892 vap->va_gid = gid; 893 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 894 vap->va_fileid = udf_calchash(&udf_node->loc); /* inode hash XXX */ 895 vap->va_size = filesize; 896 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 897 898 /* 899 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 900 * 1 to the link count if its a directory we're requested attributes 901 * of. 902 */ 903 if (vap->va_type == VDIR) 904 vap->va_nlink++; 905 906 /* access times */ 907 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 908 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 909 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 910 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 911 912 vap->va_gen = 1; /* no multiple generations yes (!?) */ 913 vap->va_flags = 0; /* no flags */ 914 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 915 vap->va_filerev = 1; /* TODO file revision numbers? */ 916 vap->va_vaflags = 0; 917 /* TODO get vaflags from the extended attributes? */ 918 919 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 920 error = udf_extattr_search_intern(udf_node, 921 UDF_DEVICESPEC_ATTR_NO, "", 922 &offset, &a_l); 923 /* if error, deny access */ 924 if (error || (filedata == NULL)) { 925 vap->va_mode = 0; /* or v_type = VNON? */ 926 } else { 927 devattr = (struct device_extattr_entry *) 928 filedata + offset; 929 vap->va_rdev = makedev( 930 udf_rw32(devattr->major), 931 udf_rw32(devattr->minor) 932 ); 933 /* TODO we could check the implementator */ 934 } 935 } 936 937 return 0; 938 } 939 940 /* --------------------------------------------------------------------- */ 941 942 static int 943 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 944 kauth_cred_t cred) 945 { 946 struct udf_node *udf_node = VTOI(vp); 947 uid_t euid, uid; 948 gid_t egid, gid; 949 int issuperuser, ismember; 950 int error; 951 952 #ifdef notyet 953 /* TODO get vaflags from the extended attributes? */ 954 /* Immutable or append-only files cannot be modified, either. */ 955 if (udf_node->flags & (IMMUTABLE | APPEND)) 956 return EPERM; 957 #endif 958 959 if (vp->v_mount->mnt_flag & MNT_RDONLY) 960 return EROFS; 961 962 /* retrieve old values */ 963 udf_getownership(udf_node, &uid, &gid); 964 965 /* only one could be specified */ 966 if (new_uid == VNOVAL) 967 new_uid = uid; 968 if (new_gid == VNOVAL) 969 new_gid = gid; 970 971 /* check if we can fit it in an 32 bits */ 972 if ((uid_t) ((uint32_t) uid) != uid) 973 return EINVAL; 974 if ((gid_t) ((uint32_t) gid) != gid) 975 return EINVAL; 976 977 /* 978 * If we don't own the file, are trying to change the owner of the 979 * file, or are not a member of the target group, the caller's 980 * credentials must imply super-user privilege or the call fails. 981 */ 982 983 /* check permissions */ 984 euid = kauth_cred_geteuid(cred); 985 egid = kauth_cred_getegid(cred); 986 if ((error = kauth_cred_ismember_gid(cred, new_gid, &ismember))) 987 return error; 988 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 989 issuperuser = (error == 0); 990 991 if (!issuperuser) { 992 if ((new_uid != uid) || (euid != uid)) 993 return EPERM; 994 if ((new_gid != gid) && !(egid == new_gid || ismember)) 995 return EPERM; 996 } 997 998 /* change the ownership */ 999 udf_setownership(udf_node, new_uid, new_gid); 1000 1001 /* mark node changed */ 1002 udf_node->i_flags |= IN_CHANGE; 1003 1004 return 0; 1005 } 1006 1007 1008 static int 1009 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1010 { 1011 struct udf_node *udf_node = VTOI(vp); 1012 uid_t euid, uid; 1013 gid_t egid, gid; 1014 int issuperuser, ismember; 1015 int error; 1016 1017 #ifdef notyet 1018 /* TODO get vaflags from the extended attributes? */ 1019 /* Immutable or append-only files cannot be modified, either. */ 1020 if (udf_node->flags & (IMMUTABLE | APPEND)) 1021 return EPERM; 1022 #endif 1023 1024 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1025 return EROFS; 1026 1027 /* retrieve uid/gid values */ 1028 udf_getownership(udf_node, &uid, &gid); 1029 1030 /* check permissions */ 1031 euid = kauth_cred_geteuid(cred); 1032 egid = kauth_cred_getegid(cred); 1033 if ((error = kauth_cred_ismember_gid(cred, gid, &ismember))) 1034 return error; 1035 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1036 issuperuser = (error == 0); 1037 1038 if ((euid != uid) && !issuperuser) 1039 return EPERM; 1040 if (euid != 0) { 1041 if (vp->v_type != VDIR && (mode & S_ISTXT)) 1042 return EFTYPE; 1043 1044 if ((!ismember) && (mode & S_ISGID)) 1045 return EPERM; 1046 } 1047 1048 /* change mode */ 1049 udf_setaccessmode(udf_node, mode); 1050 1051 /* mark node changed */ 1052 udf_node->i_flags |= IN_CHANGE; 1053 1054 return 0; 1055 } 1056 1057 1058 /* exported */ 1059 int 1060 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1061 { 1062 struct udf_node *udf_node = VTOI(vp); 1063 int error, extended; 1064 1065 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1066 return EROFS; 1067 1068 /* Decide whether this is a valid operation based on the file type. */ 1069 switch (vp->v_type) { 1070 case VDIR: 1071 return EISDIR; 1072 case VREG: 1073 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1074 return EROFS; 1075 break; 1076 case VBLK: 1077 /* FALLTHROUGH */ 1078 case VCHR: 1079 /* FALLTHROUGH */ 1080 case VFIFO: 1081 /* Allow modifications of special files even if in the file 1082 * system is mounted read-only (we are not modifying the 1083 * files themselves, but the objects they represent). */ 1084 return 0; 1085 default: 1086 /* Anything else is unsupported. */ 1087 return EOPNOTSUPP; 1088 } 1089 1090 #if notyet 1091 /* TODO get vaflags from the extended attributes? */ 1092 /* Immutable or append-only files cannot be modified, either. */ 1093 if (node->flags & (IMMUTABLE | APPEND)) 1094 return EPERM; 1095 #endif 1096 1097 /* resize file to the requested size */ 1098 error = udf_resize_node(udf_node, newsize, &extended); 1099 1100 if (error == 0) { 1101 /* mark change */ 1102 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1103 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1104 udf_update(vp, NULL, NULL, NULL, 0); 1105 } 1106 1107 return error; 1108 } 1109 1110 1111 static int 1112 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1113 { 1114 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1115 return EROFS; 1116 1117 /* XXX we can't do this yet XXX */ 1118 1119 return EINVAL; 1120 } 1121 1122 1123 static int 1124 udf_chtimes(struct vnode *vp, 1125 struct timespec *atime, struct timespec *mtime, 1126 struct timespec *birthtime, int setattrflags, 1127 kauth_cred_t cred) 1128 { 1129 struct udf_node *udf_node = VTOI(vp); 1130 uid_t euid, uid; 1131 gid_t gid; 1132 int issuperuser; 1133 int error; 1134 1135 #ifdef notyet 1136 /* TODO get vaflags from the extended attributes? */ 1137 /* Immutable or append-only files cannot be modified, either. */ 1138 if (udf_node->flags & (IMMUTABLE | APPEND)) 1139 return EPERM; 1140 #endif 1141 1142 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1143 return EROFS; 1144 1145 /* retrieve uid/gid values */ 1146 udf_getownership(udf_node, &uid, &gid); 1147 1148 /* check permissions */ 1149 euid = kauth_cred_geteuid(cred); 1150 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1151 issuperuser = (error == 0); 1152 1153 if (!issuperuser) { 1154 if (euid != uid) 1155 return EPERM; 1156 if ((setattrflags & VA_UTIMES_NULL) == 0) { 1157 error = VOP_ACCESS(vp, VWRITE, cred); 1158 if (error) 1159 return error; 1160 } 1161 } 1162 1163 /* update node flags depending on what times are passed */ 1164 if (atime->tv_sec != VNOVAL) 1165 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1166 udf_node->i_flags |= IN_ACCESS; 1167 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1168 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1169 1170 return udf_update(vp, atime, mtime, birthtime, 0); 1171 } 1172 1173 1174 int 1175 udf_setattr(void *v) 1176 { 1177 struct vop_setattr_args /* { 1178 struct vnode *a_vp; 1179 struct vattr *a_vap; 1180 kauth_cred_t a_cred; 1181 struct lwp *a_l; 1182 } */ *ap = v; 1183 struct vnode *vp = ap->a_vp; 1184 /* struct udf_node *udf_node = VTOI(vp); */ 1185 /* struct udf_mount *ump = udf_node->ump; */ 1186 kauth_cred_t cred = ap->a_cred; 1187 struct vattr *vap = ap->a_vap; 1188 int error; 1189 1190 DPRINTF(CALL, ("udf_setattr called\n")); 1191 1192 /* Abort if any unsettable attribute is given. */ 1193 error = 0; 1194 if (vap->va_type != VNON || 1195 vap->va_nlink != VNOVAL || 1196 vap->va_fsid != VNOVAL || 1197 vap->va_fileid != VNOVAL || 1198 vap->va_blocksize != VNOVAL || 1199 #ifdef notyet 1200 /* checks are debated */ 1201 vap->va_ctime.tv_sec != VNOVAL || 1202 vap->va_ctime.tv_nsec != VNOVAL || 1203 vap->va_birthtime.tv_sec != VNOVAL || 1204 vap->va_birthtime.tv_nsec != VNOVAL || 1205 #endif 1206 vap->va_gen != VNOVAL || 1207 vap->va_rdev != VNOVAL || 1208 vap->va_bytes != VNOVAL) 1209 error = EINVAL; 1210 1211 DPRINTF(ATTR, ("setattr changing:\n")); 1212 if (error == 0 && (vap->va_flags != VNOVAL)) { 1213 DPRINTF(ATTR, ("\tchflags\n")); 1214 error = udf_chflags(vp, vap->va_flags, cred); 1215 } 1216 1217 if (error == 0 && (vap->va_size != VNOVAL)) { 1218 DPRINTF(ATTR, ("\tchsize\n")); 1219 error = udf_chsize(vp, vap->va_size, cred); 1220 } 1221 1222 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1223 DPRINTF(ATTR, ("\tchown\n")); 1224 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1225 } 1226 1227 if (error == 0 && (vap->va_mode != VNOVAL)) { 1228 DPRINTF(ATTR, ("\tchmod\n")); 1229 error = udf_chmod(vp, vap->va_mode, cred); 1230 } 1231 1232 if (error == 0 && 1233 ((vap->va_atime.tv_sec != VNOVAL && 1234 vap->va_atime.tv_nsec != VNOVAL) || 1235 (vap->va_mtime.tv_sec != VNOVAL && 1236 vap->va_mtime.tv_nsec != VNOVAL)) 1237 ) { 1238 DPRINTF(ATTR, ("\tchtimes\n")); 1239 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1240 &vap->va_birthtime, vap->va_vaflags, cred); 1241 } 1242 VN_KNOTE(vp, NOTE_ATTRIB); 1243 1244 return error; 1245 } 1246 1247 /* --------------------------------------------------------------------- */ 1248 1249 /* 1250 * Return POSIX pathconf information for UDF file systems. 1251 */ 1252 int 1253 udf_pathconf(void *v) 1254 { 1255 struct vop_pathconf_args /* { 1256 struct vnode *a_vp; 1257 int a_name; 1258 register_t *a_retval; 1259 } */ *ap = v; 1260 uint32_t bits; 1261 1262 DPRINTF(CALL, ("udf_pathconf called\n")); 1263 1264 switch (ap->a_name) { 1265 case _PC_LINK_MAX: 1266 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1267 return 0; 1268 case _PC_NAME_MAX: 1269 *ap->a_retval = NAME_MAX; 1270 return 0; 1271 case _PC_PATH_MAX: 1272 *ap->a_retval = PATH_MAX; 1273 return 0; 1274 case _PC_PIPE_BUF: 1275 *ap->a_retval = PIPE_BUF; 1276 return 0; 1277 case _PC_CHOWN_RESTRICTED: 1278 *ap->a_retval = 1; 1279 return 0; 1280 case _PC_NO_TRUNC: 1281 *ap->a_retval = 1; 1282 return 0; 1283 case _PC_SYNC_IO: 1284 *ap->a_retval = 0; /* synchronised is off for performance */ 1285 return 0; 1286 case _PC_FILESIZEBITS: 1287 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1288 bits = 64; /* XXX ought to deliver 65 */ 1289 #if 0 1290 if (udf_node) 1291 bits = 64 * vp->v_mount->mnt_dev_bshift; 1292 #endif 1293 *ap->a_retval = bits; 1294 return 0; 1295 } 1296 1297 return EINVAL; 1298 } 1299 1300 1301 /* --------------------------------------------------------------------- */ 1302 1303 int 1304 udf_open(void *v) 1305 { 1306 struct vop_open_args /* { 1307 struct vnode *a_vp; 1308 int a_mode; 1309 kauth_cred_t a_cred; 1310 struct proc *a_p; 1311 } */ *ap = v; 1312 int flags; 1313 1314 DPRINTF(CALL, ("udf_open called\n")); 1315 1316 /* 1317 * Files marked append-only must be opened for appending. 1318 * TODO: get chflags(2) flags from extened attribute. 1319 */ 1320 flags = 0; 1321 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1322 return (EPERM); 1323 1324 return 0; 1325 } 1326 1327 1328 /* --------------------------------------------------------------------- */ 1329 1330 int 1331 udf_close(void *v) 1332 { 1333 struct vop_close_args /* { 1334 struct vnode *a_vp; 1335 int a_fflag; 1336 kauth_cred_t a_cred; 1337 struct proc *a_p; 1338 } */ *ap = v; 1339 struct vnode *vp = ap->a_vp; 1340 struct udf_node *udf_node = VTOI(vp); 1341 1342 DPRINTF(CALL, ("udf_close called\n")); 1343 udf_node = udf_node; /* shut up gcc */ 1344 1345 mutex_enter(&vp->v_interlock); 1346 if (vp->v_usecount > 1) 1347 udf_itimes(udf_node, NULL, NULL, NULL); 1348 mutex_exit(&vp->v_interlock); 1349 1350 return 0; 1351 } 1352 1353 1354 /* --------------------------------------------------------------------- */ 1355 1356 int 1357 udf_access(void *v) 1358 { 1359 struct vop_access_args /* { 1360 struct vnode *a_vp; 1361 int a_mode; 1362 kauth_cred_t a_cred; 1363 struct proc *a_p; 1364 } */ *ap = v; 1365 struct vnode *vp = ap->a_vp; 1366 mode_t mode = ap->a_mode; 1367 kauth_cred_t cred = ap->a_cred; 1368 /* struct udf_node *udf_node = VTOI(vp); */ 1369 struct vattr vap; 1370 int flags; 1371 int error; 1372 1373 DPRINTF(CALL, ("udf_access called\n")); 1374 1375 error = VOP_GETATTR(vp, &vap, NULL); 1376 if (error) 1377 return error; 1378 1379 /* check if we are allowed to write */ 1380 switch (vap.va_type) { 1381 case VDIR: 1382 case VLNK: 1383 case VREG: 1384 /* 1385 * normal nodes: check if we're on a read-only mounted 1386 * filingsystem and bomb out if we're trying to write. 1387 */ 1388 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1389 return EROFS; 1390 break; 1391 case VBLK: 1392 case VCHR: 1393 case VSOCK: 1394 case VFIFO: 1395 /* 1396 * special nodes: even on read-only mounted filingsystems 1397 * these are allowed to be written to if permissions allow. 1398 */ 1399 break; 1400 default: 1401 /* no idea what this is */ 1402 return EINVAL; 1403 } 1404 1405 /* noone may write immutable files */ 1406 /* TODO: get chflags(2) flags from extened attribute. */ 1407 flags = 0; 1408 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1409 return EPERM; 1410 1411 /* ask the generic vaccess to advice on security */ 1412 return vaccess(vp->v_type, 1413 vap.va_mode, vap.va_uid, vap.va_gid, 1414 mode, cred); 1415 } 1416 1417 /* --------------------------------------------------------------------- */ 1418 1419 int 1420 udf_create(void *v) 1421 { 1422 struct vop_create_args /* { 1423 struct vnode *a_dvp; 1424 struct vnode **a_vpp; 1425 struct componentname *a_cnp; 1426 struct vattr *a_vap; 1427 } */ *ap = v; 1428 struct vnode *dvp = ap->a_dvp; 1429 struct vnode **vpp = ap->a_vpp; 1430 struct vattr *vap = ap->a_vap; 1431 struct componentname *cnp = ap->a_cnp; 1432 int error; 1433 1434 DPRINTF(CALL, ("udf_create called\n")); 1435 error = udf_create_node(dvp, vpp, vap, cnp); 1436 1437 if (error || !(cnp->cn_flags & SAVESTART)) 1438 PNBUF_PUT(cnp->cn_pnbuf); 1439 vput(dvp); 1440 return error; 1441 } 1442 1443 /* --------------------------------------------------------------------- */ 1444 1445 int 1446 udf_mknod(void *v) 1447 { 1448 struct vop_mknod_args /* { 1449 struct vnode *a_dvp; 1450 struct vnode **a_vpp; 1451 struct componentname *a_cnp; 1452 struct vattr *a_vap; 1453 } */ *ap = v; 1454 struct vnode *dvp = ap->a_dvp; 1455 struct vnode **vpp = ap->a_vpp; 1456 struct vattr *vap = ap->a_vap; 1457 struct componentname *cnp = ap->a_cnp; 1458 int error; 1459 1460 DPRINTF(CALL, ("udf_mknod called\n")); 1461 error = udf_create_node(dvp, vpp, vap, cnp); 1462 1463 if (error || !(cnp->cn_flags & SAVESTART)) 1464 PNBUF_PUT(cnp->cn_pnbuf); 1465 vput(dvp); 1466 return error; 1467 } 1468 1469 /* --------------------------------------------------------------------- */ 1470 1471 int 1472 udf_mkdir(void *v) 1473 { 1474 struct vop_mkdir_args /* { 1475 struct vnode *a_dvp; 1476 struct vnode **a_vpp; 1477 struct componentname *a_cnp; 1478 struct vattr *a_vap; 1479 } */ *ap = v; 1480 struct vnode *dvp = ap->a_dvp; 1481 struct vnode **vpp = ap->a_vpp; 1482 struct vattr *vap = ap->a_vap; 1483 struct componentname *cnp = ap->a_cnp; 1484 int error; 1485 1486 DPRINTF(CALL, ("udf_mkdir called\n")); 1487 error = udf_create_node(dvp, vpp, vap, cnp); 1488 1489 if (error || !(cnp->cn_flags & SAVESTART)) 1490 PNBUF_PUT(cnp->cn_pnbuf); 1491 vput(dvp); 1492 return error; 1493 } 1494 1495 /* --------------------------------------------------------------------- */ 1496 1497 static int 1498 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1499 { 1500 struct udf_node *udf_node, *dir_node; 1501 struct vattr vap; 1502 int error; 1503 1504 DPRINTF(CALL, ("udf_link called\n")); 1505 error = 0; 1506 1507 /* some quick checks */ 1508 if (vp->v_type == VDIR) 1509 return EPERM; /* can't link a directory */ 1510 if (dvp->v_mount != vp->v_mount) 1511 return EXDEV; /* can't link across devices */ 1512 if (dvp == vp) 1513 return EPERM; /* can't be the same */ 1514 1515 /* lock node */ 1516 error = vn_lock(vp, LK_EXCLUSIVE); 1517 if (error) 1518 return error; 1519 1520 /* get attributes */ 1521 dir_node = VTOI(dvp); 1522 udf_node = VTOI(vp); 1523 1524 error = VOP_GETATTR(vp, &vap, FSCRED); 1525 if (error) 1526 return error; 1527 1528 /* check link count overflow */ 1529 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1530 return EMLINK; 1531 1532 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1533 } 1534 1535 int 1536 udf_link(void *v) 1537 { 1538 struct vop_link_args /* { 1539 struct vnode *a_dvp; 1540 struct vnode *a_vp; 1541 struct componentname *a_cnp; 1542 } */ *ap = v; 1543 struct vnode *dvp = ap->a_dvp; 1544 struct vnode *vp = ap->a_vp; 1545 struct componentname *cnp = ap->a_cnp; 1546 int error; 1547 1548 error = udf_do_link(dvp, vp, cnp); 1549 if (error) 1550 VOP_ABORTOP(dvp, cnp); 1551 1552 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1553 VOP_UNLOCK(vp, 0); 1554 1555 VN_KNOTE(vp, NOTE_LINK); 1556 VN_KNOTE(dvp, NOTE_WRITE); 1557 vput(dvp); 1558 1559 return error; 1560 } 1561 1562 /* --------------------------------------------------------------------- */ 1563 1564 static int 1565 udf_do_symlink(struct udf_node *udf_node, char *target) 1566 { 1567 struct pathcomp pathcomp; 1568 uint8_t *pathbuf, *pathpos, *compnamepos; 1569 char *mntonname; 1570 int pathlen, len, compnamelen, mntonnamelen; 1571 int error; 1572 1573 /* process `target' to an UDF structure */ 1574 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1575 pathpos = pathbuf; 1576 pathlen = 0; 1577 1578 if (*target == '/') { 1579 /* symlink starts from the root */ 1580 len = UDF_PATH_COMP_SIZE; 1581 memset(&pathcomp, 0, len); 1582 pathcomp.type = UDF_PATH_COMP_ROOT; 1583 1584 /* check if its mount-point relative! */ 1585 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1586 mntonnamelen = strlen(mntonname); 1587 if (strlen(target) >= mntonnamelen) { 1588 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1589 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1590 target += mntonnamelen; 1591 } 1592 } else { 1593 target++; 1594 } 1595 1596 memcpy(pathpos, &pathcomp, len); 1597 pathpos += len; 1598 pathlen += len; 1599 } 1600 1601 error = 0; 1602 while (*target) { 1603 /* ignore multiple '/' */ 1604 while (*target == '/') { 1605 target++; 1606 } 1607 if (!*target) 1608 break; 1609 1610 /* extract component name */ 1611 compnamelen = 0; 1612 compnamepos = target; 1613 while ((*target) && (*target != '/')) { 1614 target++; 1615 compnamelen++; 1616 } 1617 1618 /* just trunc if too long ?? (security issue) */ 1619 if (compnamelen >= 127) { 1620 error = ENAMETOOLONG; 1621 break; 1622 } 1623 1624 /* convert unix name to UDF name */ 1625 len = sizeof(struct pathcomp); 1626 memset(&pathcomp, 0, len); 1627 pathcomp.type = UDF_PATH_COMP_NAME; 1628 len = UDF_PATH_COMP_SIZE; 1629 1630 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1631 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1632 if ((compnamelen == 1) && (*compnamepos == '.')) 1633 pathcomp.type = UDF_PATH_COMP_CURDIR; 1634 1635 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1636 unix_to_udf_name( 1637 (char *) &pathcomp.ident, &pathcomp.l_ci, 1638 compnamepos, compnamelen, 1639 &udf_node->ump->logical_vol->desc_charset); 1640 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1641 } 1642 1643 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1644 error = ENAMETOOLONG; 1645 break; 1646 } 1647 1648 memcpy(pathpos, &pathcomp, len); 1649 pathpos += len; 1650 pathlen += len; 1651 } 1652 1653 if (error) { 1654 /* aparently too big */ 1655 free(pathbuf, M_UDFTEMP); 1656 return error; 1657 } 1658 1659 error = udf_grow_node(udf_node, pathlen); 1660 if (error) { 1661 /* failed to pregrow node */ 1662 free(pathbuf, M_UDFTEMP); 1663 return error; 1664 } 1665 1666 /* write out structure on the new file */ 1667 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1668 pathbuf, pathlen, 0, 1669 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1670 FSCRED, NULL, NULL); 1671 1672 /* return status of symlink contents writeout */ 1673 free(pathbuf, M_UDFTEMP); 1674 return error; 1675 } 1676 1677 1678 int 1679 udf_symlink(void *v) 1680 { 1681 struct vop_symlink_args /* { 1682 struct vnode *a_dvp; 1683 struct vnode **a_vpp; 1684 struct componentname *a_cnp; 1685 struct vattr *a_vap; 1686 char *a_target; 1687 } */ *ap = v; 1688 struct vnode *dvp = ap->a_dvp; 1689 struct vnode **vpp = ap->a_vpp; 1690 struct vattr *vap = ap->a_vap; 1691 struct componentname *cnp = ap->a_cnp; 1692 struct udf_node *dir_node; 1693 struct udf_node *udf_node; 1694 int error; 1695 1696 DPRINTF(CALL, ("udf_symlink called\n")); 1697 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1698 error = udf_create_node(dvp, vpp, vap, cnp); 1699 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1700 if (!error) { 1701 dir_node = VTOI(dvp); 1702 udf_node = VTOI(*vpp); 1703 KASSERT(udf_node); 1704 error = udf_do_symlink(udf_node, ap->a_target); 1705 if (error) { 1706 /* remove node */ 1707 udf_shrink_node(udf_node, 0); 1708 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1709 } 1710 } 1711 if (error || !(cnp->cn_flags & SAVESTART)) 1712 PNBUF_PUT(cnp->cn_pnbuf); 1713 vput(dvp); 1714 return error; 1715 } 1716 1717 /* --------------------------------------------------------------------- */ 1718 1719 int 1720 udf_readlink(void *v) 1721 { 1722 struct vop_readlink_args /* { 1723 struct vnode *a_vp; 1724 struct uio *a_uio; 1725 kauth_cred_t a_cred; 1726 } */ *ap = v; 1727 struct vnode *vp = ap->a_vp; 1728 struct uio *uio = ap->a_uio; 1729 kauth_cred_t cred = ap->a_cred; 1730 struct udf_node *udf_node; 1731 struct pathcomp pathcomp; 1732 struct vattr vattr; 1733 uint8_t *pathbuf, *targetbuf, *tmpname; 1734 uint8_t *pathpos, *targetpos; 1735 char *mntonname; 1736 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1737 int first, error; 1738 1739 DPRINTF(CALL, ("udf_readlink called\n")); 1740 1741 udf_node = VTOI(vp); 1742 error = VOP_GETATTR(vp, &vattr, cred); 1743 if (error) 1744 return error; 1745 1746 /* claim temporary buffers for translation */ 1747 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1748 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1749 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1750 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1751 memset(targetbuf, 0, PATH_MAX); 1752 1753 /* read contents of file in our temporary buffer */ 1754 error = vn_rdwr(UIO_READ, udf_node->vnode, 1755 pathbuf, vattr.va_size, 0, 1756 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1757 FSCRED, NULL, NULL); 1758 if (error) { 1759 /* failed to read in symlink contents */ 1760 free(pathbuf, M_UDFTEMP); 1761 free(targetbuf, M_UDFTEMP); 1762 free(tmpname, M_UDFTEMP); 1763 return error; 1764 } 1765 1766 /* convert to a unix path */ 1767 pathpos = pathbuf; 1768 pathlen = 0; 1769 targetpos = targetbuf; 1770 targetlen = PATH_MAX; 1771 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1772 mntonnamelen = strlen(mntonname); 1773 1774 error = 0; 1775 first = 1; 1776 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1777 len = UDF_PATH_COMP_SIZE; 1778 memcpy(&pathcomp, pathpos, len); 1779 l_ci = pathcomp.l_ci; 1780 switch (pathcomp.type) { 1781 case UDF_PATH_COMP_ROOT : 1782 /* XXX should check for l_ci; bugcompatible now */ 1783 if ((targetlen < 1) || !first) { 1784 error = EINVAL; 1785 break; 1786 } 1787 *targetpos++ = '/'; targetlen--; 1788 break; 1789 case UDF_PATH_COMP_MOUNTROOT : 1790 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1791 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1792 error = EINVAL; 1793 break; 1794 } 1795 memcpy(targetpos, mntonname, mntonnamelen); 1796 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1797 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1798 /* more follows, so must be directory */ 1799 *targetpos++ = '/'; targetlen--; 1800 } 1801 break; 1802 case UDF_PATH_COMP_PARENTDIR : 1803 /* XXX should check for l_ci; bugcompatible now */ 1804 if (targetlen < 3) { 1805 error = EINVAL; 1806 break; 1807 } 1808 *targetpos++ = '.'; targetlen--; 1809 *targetpos++ = '.'; targetlen--; 1810 *targetpos++ = '/'; targetlen--; 1811 break; 1812 case UDF_PATH_COMP_CURDIR : 1813 /* XXX should check for l_ci; bugcompatible now */ 1814 if (targetlen < 2) { 1815 error = EINVAL; 1816 break; 1817 } 1818 *targetpos++ = '.'; targetlen--; 1819 *targetpos++ = '/'; targetlen--; 1820 break; 1821 case UDF_PATH_COMP_NAME : 1822 if (l_ci == 0) { 1823 error = EINVAL; 1824 break; 1825 } 1826 memset(tmpname, 0, PATH_MAX); 1827 memcpy(&pathcomp, pathpos, len + l_ci); 1828 udf_to_unix_name(tmpname, MAXPATHLEN, 1829 pathcomp.ident, l_ci, 1830 &udf_node->ump->logical_vol->desc_charset); 1831 namelen = strlen(tmpname); 1832 if (targetlen < namelen + 1) { 1833 error = EINVAL; 1834 break; 1835 } 1836 memcpy(targetpos, tmpname, namelen); 1837 targetpos += namelen; targetlen -= namelen; 1838 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1839 /* more follows, so must be directory */ 1840 *targetpos++ = '/'; targetlen--; 1841 } 1842 break; 1843 default : 1844 error = EINVAL; 1845 break; 1846 } 1847 first = 0; 1848 if (error) 1849 break; 1850 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1851 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1852 1853 } 1854 /* all processed? */ 1855 if (vattr.va_size - pathlen > 0) 1856 error = EINVAL; 1857 1858 /* uiomove() to destination */ 1859 if (!error) 1860 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1861 1862 free(pathbuf, M_UDFTEMP); 1863 free(targetbuf, M_UDFTEMP); 1864 free(tmpname, M_UDFTEMP); 1865 1866 return error; 1867 } 1868 1869 /* --------------------------------------------------------------------- */ 1870 1871 /* note: i tried to follow the logics of the tmpfs rename code */ 1872 int 1873 udf_rename(void *v) 1874 { 1875 struct vop_rename_args /* { 1876 struct vnode *a_fdvp; 1877 struct vnode *a_fvp; 1878 struct componentname *a_fcnp; 1879 struct vnode *a_tdvp; 1880 struct vnode *a_tvp; 1881 struct componentname *a_tcnp; 1882 } */ *ap = v; 1883 struct vnode *tvp = ap->a_tvp; 1884 struct vnode *tdvp = ap->a_tdvp; 1885 struct vnode *fvp = ap->a_fvp; 1886 struct vnode *fdvp = ap->a_fdvp; 1887 struct componentname *tcnp = ap->a_tcnp; 1888 struct componentname *fcnp = ap->a_fcnp; 1889 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1890 struct vattr fvap, tvap; 1891 int error; 1892 1893 DPRINTF(CALL, ("udf_rename called\n")); 1894 1895 /* disallow cross-device renames */ 1896 if (fvp->v_mount != tdvp->v_mount || 1897 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1898 error = EXDEV; 1899 goto out_unlocked; 1900 } 1901 1902 fnode = VTOI(fvp); 1903 fdnode = VTOI(fdvp); 1904 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1905 tdnode = VTOI(tdvp); 1906 1907 /* lock our source dir */ 1908 if (fdnode != tdnode) { 1909 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1910 if (error != 0) 1911 goto out_unlocked; 1912 } 1913 1914 /* get info about the node to be moved */ 1915 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1916 KASSERT(error == 0); 1917 1918 /* check when to delete the old already existing entry */ 1919 if (tvp) { 1920 /* get info about the node to be moved to */ 1921 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1922 KASSERT(error == 0); 1923 1924 /* if both dirs, make sure the destination is empty */ 1925 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1926 if (tvap.va_nlink > 2) { 1927 error = ENOTEMPTY; 1928 goto out; 1929 } 1930 } 1931 /* if moving dir, make sure destination is dir too */ 1932 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1933 error = ENOTDIR; 1934 goto out; 1935 } 1936 /* if we're moving a non-directory, make sure dest is no dir */ 1937 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1938 error = EISDIR; 1939 goto out; 1940 } 1941 } 1942 1943 /* dont allow renaming directories acros directory for now */ 1944 if (fdnode != tdnode) { 1945 if (fvp->v_type == VDIR) { 1946 error = EINVAL; 1947 goto out; 1948 } 1949 } 1950 1951 /* remove existing entry if present */ 1952 if (tvp) 1953 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1954 1955 /* create new directory entry for the node */ 1956 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1957 if (error) 1958 goto out; 1959 1960 /* unlink old directory entry for the node, if failing, unattach new */ 1961 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1962 if (error) 1963 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1964 1965 out: 1966 if (fdnode != tdnode) 1967 VOP_UNLOCK(fdvp, 0); 1968 1969 out_unlocked: 1970 VOP_ABORTOP(tdvp, tcnp); 1971 if (tdvp == tvp) 1972 vrele(tdvp); 1973 else 1974 vput(tdvp); 1975 if (tvp) 1976 vput(tvp); 1977 VOP_ABORTOP(fdvp, fcnp); 1978 1979 /* release source nodes. */ 1980 vrele(fdvp); 1981 vrele(fvp); 1982 1983 return error; 1984 } 1985 1986 /* --------------------------------------------------------------------- */ 1987 1988 int 1989 udf_remove(void *v) 1990 { 1991 struct vop_remove_args /* { 1992 struct vnode *a_dvp; 1993 struct vnode *a_vp; 1994 struct componentname *a_cnp; 1995 } */ *ap = v; 1996 struct vnode *dvp = ap->a_dvp; 1997 struct vnode *vp = ap->a_vp; 1998 struct componentname *cnp = ap->a_cnp; 1999 struct udf_node *dir_node = VTOI(dvp);; 2000 struct udf_node *udf_node = VTOI(vp); 2001 struct udf_mount *ump = dir_node->ump; 2002 int error; 2003 2004 DPRINTF(CALL, ("udf_remove called\n")); 2005 if (vp->v_type != VDIR) { 2006 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2007 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2008 } else { 2009 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2010 error = EPERM; 2011 } 2012 2013 if (error == 0) { 2014 VN_KNOTE(vp, NOTE_DELETE); 2015 VN_KNOTE(dvp, NOTE_WRITE); 2016 } 2017 2018 if (dvp == vp) 2019 vrele(vp); 2020 else 2021 vput(vp); 2022 vput(dvp); 2023 2024 return error; 2025 } 2026 2027 /* --------------------------------------------------------------------- */ 2028 2029 int 2030 udf_rmdir(void *v) 2031 { 2032 struct vop_rmdir_args /* { 2033 struct vnode *a_dvp; 2034 struct vnode *a_vp; 2035 struct componentname *a_cnp; 2036 } */ *ap = v; 2037 struct vnode *vp = ap->a_vp; 2038 struct vnode *dvp = ap->a_dvp; 2039 struct componentname *cnp = ap->a_cnp; 2040 struct udf_node *dir_node = VTOI(dvp);; 2041 struct udf_node *udf_node = VTOI(vp); 2042 struct udf_mount *ump = dir_node->ump; 2043 int refcnt, error; 2044 2045 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2046 2047 /* don't allow '.' to be deleted */ 2048 if (dir_node == udf_node) { 2049 vrele(dvp); 2050 vput(vp); 2051 return EINVAL; 2052 } 2053 2054 /* check to see if the directory is empty */ 2055 error = 0; 2056 if (dir_node->fe) { 2057 refcnt = udf_rw16(udf_node->fe->link_cnt); 2058 } else { 2059 refcnt = udf_rw16(udf_node->efe->link_cnt); 2060 } 2061 if (refcnt > 1) { 2062 /* NOT empty */ 2063 vput(dvp); 2064 vput(vp); 2065 return ENOTEMPTY; 2066 } 2067 2068 /* detach the node from the directory */ 2069 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2070 if (error == 0) { 2071 cache_purge(vp); 2072 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2073 VN_KNOTE(vp, NOTE_DELETE); 2074 } 2075 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2076 2077 /* unput the nodes and exit */ 2078 vput(dvp); 2079 vput(vp); 2080 2081 return error; 2082 } 2083 2084 /* --------------------------------------------------------------------- */ 2085 2086 int 2087 udf_fsync(void *v) 2088 { 2089 struct vop_fsync_args /* { 2090 struct vnode *a_vp; 2091 kauth_cred_t a_cred; 2092 int a_flags; 2093 off_t offlo; 2094 off_t offhi; 2095 struct proc *a_p; 2096 } */ *ap = v; 2097 struct vnode *vp = ap->a_vp; 2098 struct udf_node *udf_node = VTOI(vp); 2099 int error, flags, wait; 2100 2101 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2102 udf_node, 2103 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2104 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2105 2106 /* flush data and wait for it when requested */ 2107 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2108 vflushbuf(vp, wait); 2109 2110 if (udf_node == NULL) { 2111 printf("udf_fsync() called on NULL udf_node!\n"); 2112 return 0; 2113 } 2114 if (vp->v_tag != VT_UDF) { 2115 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2116 return 0; 2117 } 2118 2119 /* set our times */ 2120 udf_itimes(udf_node, NULL, NULL, NULL); 2121 2122 /* if called when mounted readonly, never write back */ 2123 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2124 return 0; 2125 2126 /* if only data is requested, return */ 2127 if (ap->a_flags & FSYNC_DATAONLY) 2128 return 0; 2129 2130 /* check if the node is dirty 'enough'*/ 2131 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2132 if (flags == 0) 2133 return 0; 2134 2135 /* if we don't have to wait, check for IO pending */ 2136 if (!wait) { 2137 if (vp->v_numoutput > 0) { 2138 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2139 return 0; 2140 } 2141 if (udf_node->outstanding_bufs > 0) { 2142 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2143 return 0; 2144 } 2145 if (udf_node->outstanding_nodedscr > 0) { 2146 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2147 return 0; 2148 } 2149 } 2150 2151 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2152 if (wait) { 2153 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2154 mutex_enter(&vp->v_interlock); 2155 while (vp->v_numoutput) { 2156 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2157 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2158 } 2159 mutex_exit(&vp->v_interlock); 2160 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2161 } 2162 2163 /* write out node and wait for it if requested */ 2164 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2165 error = udf_writeout_node(udf_node, wait); 2166 if (error) 2167 return error; 2168 2169 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2170 2171 return 0; 2172 } 2173 2174 /* --------------------------------------------------------------------- */ 2175 2176 int 2177 udf_advlock(void *v) 2178 { 2179 struct vop_advlock_args /* { 2180 struct vnode *a_vp; 2181 void *a_id; 2182 int a_op; 2183 struct flock *a_fl; 2184 int a_flags; 2185 } */ *ap = v; 2186 struct vnode *vp = ap->a_vp; 2187 struct udf_node *udf_node = VTOI(vp); 2188 struct file_entry *fe; 2189 struct extfile_entry *efe; 2190 uint64_t file_size; 2191 2192 DPRINTF(LOCKING, ("udf_advlock called\n")); 2193 2194 /* get directory filesize */ 2195 if (udf_node->fe) { 2196 fe = udf_node->fe; 2197 file_size = udf_rw64(fe->inf_len); 2198 } else { 2199 assert(udf_node->efe); 2200 efe = udf_node->efe; 2201 file_size = udf_rw64(efe->inf_len); 2202 } 2203 2204 return lf_advlock(ap, &udf_node->lockf, file_size); 2205 } 2206 2207 /* --------------------------------------------------------------------- */ 2208 2209 2210 /* Global vfs vnode data structures for udfs */ 2211 int (**udf_vnodeop_p) __P((void *)); 2212 2213 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2214 { &vop_default_desc, vn_default_error }, 2215 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2216 { &vop_create_desc, udf_create }, /* create */ 2217 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2218 { &vop_open_desc, udf_open }, /* open */ 2219 { &vop_close_desc, udf_close }, /* close */ 2220 { &vop_access_desc, udf_access }, /* access */ 2221 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2222 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2223 { &vop_read_desc, udf_read }, /* read */ 2224 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2225 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2226 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2227 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2228 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2229 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2230 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2231 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2232 { &vop_seek_desc, genfs_seek }, /* seek */ 2233 { &vop_remove_desc, udf_remove }, /* remove */ 2234 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2235 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2236 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2237 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2238 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2239 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2240 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2241 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2242 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2243 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2244 { &vop_lock_desc, genfs_lock }, /* lock */ 2245 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2246 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2247 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2248 /* { &vop_print_desc, udf_print }, */ /* print */ 2249 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2250 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2251 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2252 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2253 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2254 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2255 { NULL, NULL } 2256 }; 2257 2258 2259 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2260 &udf_vnodeop_p, udf_vnodeop_entries 2261 }; 2262 2263
Indexes created Thu Oct 02 14:10:14 GMT 2025