udf_vnops.c revision 1.30.4.4
1 /* $NetBSD: udf_vnops.c,v 1.30.4.4 2009/03/18 05:08:38 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 1.30.4.4 2009/03/18 05:08:38 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; 283 vsize_t len; 284 int error; 285 int flags, resid, extended; 286 287 /* 288 * XXX writing to extended attributes not yet implemented. FreeBSD has 289 * it in mind to forward the IO_EXT read call to the 290 * VOP_READEXTATTR(). 291 */ 292 293 DPRINTF(WRITE, ("udf_write called\n")); 294 295 /* can this happen? some filingsystems have this check */ 296 if (uio->uio_offset < 0) 297 return EINVAL; 298 if (uio->uio_resid == 0) 299 return 0; 300 301 /* protect against rogue programs writing raw directories or links */ 302 if ((ioflag & IO_ALTSEMANTICS) == 0) { 303 if (vp->v_type == VDIR) 304 return EISDIR; 305 /* all but regular files just give EINVAL for now */ 306 if (vp->v_type != VREG) 307 return EINVAL; 308 } 309 310 assert(udf_node); 311 assert(udf_node->fe || udf_node->efe); 312 313 /* get file/directory filesize */ 314 if (udf_node->fe) { 315 fe = udf_node->fe; 316 file_size = udf_rw64(fe->inf_len); 317 } else { 318 assert(udf_node->efe); 319 efe = udf_node->efe; 320 file_size = udf_rw64(efe->inf_len); 321 } 322 old_size = file_size; 323 324 /* if explicitly asked to append, uio_offset can be wrong? */ 325 if (ioflag & IO_APPEND) 326 uio->uio_offset = file_size; 327 328 extended = (uio->uio_offset + uio->uio_resid > file_size); 329 if (extended) { 330 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 331 file_size, uio->uio_offset + uio->uio_resid)); 332 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 333 if (error) 334 return error; 335 file_size = uio->uio_offset + uio->uio_resid; 336 } 337 338 /* write contents using buffercache */ 339 uobj = &vp->v_uobj; 340 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 341 resid = uio->uio_resid; 342 error = 0; 343 344 uvm_vnp_setwritesize(vp, file_size); 345 while (uio->uio_resid > 0) { 346 /* maximise length to file extremity */ 347 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 348 if (len == 0) 349 break; 350 351 /* ubc, here we come, prepare to trap */ 352 win = ubc_alloc(uobj, uio->uio_offset, &len, 353 advice, UBC_WRITE); 354 error = uiomove(win, len, uio); 355 ubc_release(win, flags); 356 if (error) 357 break; 358 359 /* 360 * flush what we just wrote if necessary. 361 * XXXUBC simplistic async flushing. 362 * 363 * this one works on page sizes. Directories are excluded 364 * since its file data that we want to purge. 365 */ 366 if (!async && (vp->v_type != VDIR) && 367 (uio->uio_offset - old_offset >= PAGE_SIZE)) { 368 mutex_enter(&vp->v_interlock); 369 error = VOP_PUTPAGES(vp, 370 ptoa(atop(old_offset)), 371 ptoa(atop(uio->uio_offset + PAGE_SIZE-1)), 372 PGO_CLEANIT); 373 old_offset = uio->uio_offset; 374 } 375 } 376 uvm_vnp_setsize(vp, file_size); 377 378 /* mark node changed and request update */ 379 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 380 381 /* 382 * XXX TODO FFS has code here to reset setuid & setgid when we're not 383 * the superuser as a precaution against tampering. 384 */ 385 386 /* if we wrote a thing, note write action on vnode */ 387 if (resid > uio->uio_resid) 388 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 389 390 if (error) { 391 /* bring back file size to its former size */ 392 /* take notice of its errors? */ 393 (void) udf_chsize(vp, (u_quad_t) old_size, NOCRED); 394 395 /* roll back uio */ 396 uio->uio_offset -= resid - uio->uio_resid; 397 uio->uio_resid = resid; 398 } else { 399 /* if we write and we're synchronous, update node */ 400 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 401 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 402 } 403 404 return error; 405 } 406 407 408 /* --------------------------------------------------------------------- */ 409 410 /* 411 * `Special' bmap functionality that translates all incomming requests to 412 * translate to vop_strategy() calls with the same blocknumbers effectively 413 * not translating at all. 414 */ 415 416 int 417 udf_trivial_bmap(void *v) 418 { 419 struct vop_bmap_args /* { 420 struct vnode *a_vp; 421 daddr_t a_bn; 422 struct vnode **a_vpp; 423 daddr_t *a_bnp; 424 int *a_runp; 425 } */ *ap = v; 426 struct vnode *vp = ap->a_vp; /* our node */ 427 struct vnode **vpp = ap->a_vpp; /* return node */ 428 daddr_t *bnp = ap->a_bnp; /* translated */ 429 daddr_t bn = ap->a_bn; /* origional */ 430 int *runp = ap->a_runp; 431 struct udf_node *udf_node = VTOI(vp); 432 uint32_t lb_size; 433 434 /* get logical block size */ 435 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 436 437 /* could return `-1' to indicate holes/zeros */ 438 /* translate 1:1 */ 439 *bnp = bn; 440 441 /* set the vnode to read the data from with strategy on itself */ 442 if (vpp) 443 *vpp = vp; 444 445 /* set runlength of maximum block size */ 446 if (runp) 447 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 448 449 /* return success */ 450 return 0; 451 } 452 453 /* --------------------------------------------------------------------- */ 454 455 int 456 udf_vfsstrategy(void *v) 457 { 458 struct vop_strategy_args /* { 459 struct vnode *a_vp; 460 struct buf *a_bp; 461 } */ *ap = v; 462 struct vnode *vp = ap->a_vp; 463 struct buf *bp = ap->a_bp; 464 struct udf_node *udf_node = VTOI(vp); 465 uint32_t lb_size, from, sectors; 466 int error; 467 468 DPRINTF(STRATEGY, ("udf_strategy called\n")); 469 470 /* check if we ought to be here */ 471 if (vp->v_type == VBLK || vp->v_type == VCHR) 472 panic("udf_strategy: spec"); 473 474 /* only filebuffers ought to be read/write by this, no descriptors */ 475 assert(bp->b_blkno >= 0); 476 477 /* get sector size */ 478 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 479 480 /* calculate sector to start from */ 481 from = bp->b_blkno; 482 483 /* calculate length to fetch/store in sectors */ 484 sectors = bp->b_bcount / lb_size; 485 assert(bp->b_bcount > 0); 486 487 /* NEVER assume later that this buffer is already translated */ 488 /* bp->b_lblkno = bp->b_blkno; */ 489 490 /* check assertions: we OUGHT to always get multiples of this */ 491 assert(sectors * lb_size == bp->b_bcount); 492 493 /* issue buffer */ 494 error = 0; 495 if (bp->b_flags & B_READ) { 496 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 497 ", sector %d for %d sectors\n", 498 vp, bp, bp->b_blkno, from, sectors)); 499 500 /* read buffer from the udf_node, translate vtop on the way*/ 501 udf_read_filebuf(udf_node, bp); 502 } else { 503 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 504 ", sector %d for %d sectors\n", 505 vp, bp, bp->b_blkno, from, sectors)); 506 507 /* write buffer to the udf_node, translate vtop on the way*/ 508 udf_write_filebuf(udf_node, bp); 509 } 510 511 return bp->b_error; 512 } 513 514 /* --------------------------------------------------------------------- */ 515 516 int 517 udf_readdir(void *v) 518 { 519 struct vop_readdir_args /* { 520 struct vnode *a_vp; 521 struct uio *a_uio; 522 kauth_cred_t a_cred; 523 int *a_eofflag; 524 off_t **a_cookies; 525 int *a_ncookies; 526 } */ *ap = v; 527 struct uio *uio = ap->a_uio; 528 struct vnode *vp = ap->a_vp; 529 struct udf_node *udf_node = VTOI(vp); 530 struct file_entry *fe; 531 struct extfile_entry *efe; 532 struct fileid_desc *fid; 533 struct dirent *dirent; 534 uint64_t file_size, diroffset, transoffset; 535 uint32_t lb_size; 536 int error; 537 538 DPRINTF(READDIR, ("udf_readdir called\n")); 539 540 /* This operation only makes sense on directory nodes. */ 541 if (vp->v_type != VDIR) 542 return ENOTDIR; 543 544 /* get directory filesize */ 545 if (udf_node->fe) { 546 fe = udf_node->fe; 547 file_size = udf_rw64(fe->inf_len); 548 } else { 549 assert(udf_node->efe); 550 efe = udf_node->efe; 551 file_size = udf_rw64(efe->inf_len); 552 } 553 554 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 555 556 /* 557 * Add `.' pseudo entry if at offset zero since its not in the fid 558 * stream 559 */ 560 if (uio->uio_offset == 0) { 561 DPRINTF(READDIR, ("\t'.' inserted\n")); 562 strcpy(dirent->d_name, "."); 563 dirent->d_fileno = udf_calchash(&udf_node->loc); 564 dirent->d_type = DT_DIR; 565 dirent->d_namlen = strlen(dirent->d_name); 566 dirent->d_reclen = _DIRENT_SIZE(dirent); 567 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 568 569 /* mark with magic value that we have done the dummy */ 570 uio->uio_offset = UDF_DIRCOOKIE_DOT; 571 } 572 573 /* we are called just as long as we keep on pushing data in */ 574 error = 0; 575 if (uio->uio_offset < file_size) { 576 /* allocate temporary space for fid */ 577 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 578 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 579 580 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 581 uio->uio_offset = 0; 582 583 diroffset = uio->uio_offset; 584 transoffset = diroffset; 585 while (diroffset < file_size) { 586 DPRINTF(READDIR, ("\tread in fid stream\n")); 587 /* transfer a new fid/dirent */ 588 error = udf_read_fid_stream(vp, &diroffset, 589 fid, dirent); 590 DPRINTFIF(READDIR, error, ("read error in read fid " 591 "stream : %d\n", error)); 592 if (error) 593 break; 594 595 /* 596 * If there isn't enough space in the uio to return a 597 * whole dirent, break off read 598 */ 599 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 600 break; 601 602 /* remember the last entry we transfered */ 603 transoffset = diroffset; 604 605 /* skip deleted entries */ 606 if (fid->file_char & UDF_FILE_CHAR_DEL) 607 continue; 608 609 /* skip not visible files */ 610 if (fid->file_char & UDF_FILE_CHAR_VIS) 611 continue; 612 613 /* copy dirent to the caller */ 614 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 615 dirent->d_name, dirent->d_type)); 616 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 617 } 618 619 /* pass on last transfered offset */ 620 uio->uio_offset = transoffset; 621 free(fid, M_UDFTEMP); 622 } 623 624 if (ap->a_eofflag) 625 *ap->a_eofflag = (uio->uio_offset >= file_size); 626 627 #ifdef DEBUG 628 if (udf_verbose & UDF_DEBUG_READDIR) { 629 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 630 if (ap->a_eofflag) 631 printf("returning EOF ? %d\n", *ap->a_eofflag); 632 if (error) 633 printf("readdir returning error %d\n", error); 634 } 635 #endif 636 637 free(dirent, M_UDFTEMP); 638 return error; 639 } 640 641 /* --------------------------------------------------------------------- */ 642 643 int 644 udf_lookup(void *v) 645 { 646 struct vop_lookup_args /* { 647 struct vnode *a_dvp; 648 struct vnode **a_vpp; 649 struct componentname *a_cnp; 650 } */ *ap = v; 651 struct vnode *dvp = ap->a_dvp; 652 struct vnode **vpp = ap->a_vpp; 653 struct componentname *cnp = ap->a_cnp; 654 struct udf_node *dir_node, *res_node; 655 struct udf_mount *ump; 656 struct long_ad icb_loc; 657 const char *name; 658 int namelen, nameiop, islastcn, mounted_ro; 659 int vnodetp; 660 int error, found; 661 662 dir_node = VTOI(dvp); 663 ump = dir_node->ump; 664 *vpp = NULL; 665 666 DPRINTF(LOOKUP, ("udf_lookup called\n")); 667 668 /* simplify/clarification flags */ 669 nameiop = cnp->cn_nameiop; 670 islastcn = cnp->cn_flags & ISLASTCN; 671 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 672 673 /* check exec/dirread permissions first */ 674 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 675 if (error) 676 return error; 677 678 DPRINTF(LOOKUP, ("\taccess ok\n")); 679 680 /* 681 * If requesting a modify on the last path element on a read-only 682 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 683 */ 684 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 685 return EROFS; 686 687 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 688 cnp->cn_nameptr)); 689 /* look in the nami cache; returns 0 on success!! */ 690 error = cache_lookup(dvp, vpp, cnp); 691 if (error >= 0) 692 return error; 693 694 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 695 696 /* 697 * Obviously, the file is not (anymore) in the namecache, we have to 698 * search for it. There are three basic cases: '.', '..' and others. 699 * 700 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 701 */ 702 error = 0; 703 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 704 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 705 /* special case 1 '.' */ 706 VREF(dvp); 707 *vpp = dvp; 708 /* done */ 709 } else if (cnp->cn_flags & ISDOTDOT) { 710 /* special case 2 '..' */ 711 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 712 713 /* get our node */ 714 name = ".."; 715 namelen = 2; 716 error = udf_lookup_name_in_dir(dvp, name, namelen, 717 &icb_loc, &found); 718 if (error) 719 goto out; 720 if (!found) 721 error = ENOENT; 722 723 /* first unlock parent */ 724 VOP_UNLOCK(dvp, 0); 725 726 if (error == 0) { 727 DPRINTF(LOOKUP, ("\tfound '..'\n")); 728 /* try to create/reuse the node */ 729 error = udf_get_node(ump, &icb_loc, &res_node); 730 731 if (!error) { 732 DPRINTF(LOOKUP, 733 ("\tnode retrieved/created OK\n")); 734 *vpp = res_node->vnode; 735 } 736 } 737 738 /* try to relock parent */ 739 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 740 } else { 741 DPRINTF(LOOKUP, ("\tlookup file\n")); 742 /* all other files */ 743 /* lookup filename in the directory; location icb_loc */ 744 name = cnp->cn_nameptr; 745 namelen = cnp->cn_namelen; 746 error = udf_lookup_name_in_dir(dvp, name, namelen, 747 &icb_loc, &found); 748 if (error) 749 goto out; 750 if (!found) { 751 DPRINTF(LOOKUP, ("\tNOT found\n")); 752 /* 753 * UGH, didn't find name. If we're creating or 754 * renaming on the last name this is OK and we ought 755 * to return EJUSTRETURN if its allowed to be created. 756 */ 757 error = ENOENT; 758 if (islastcn && 759 (nameiop == CREATE || nameiop == RENAME)) 760 error = 0; 761 if (!error) { 762 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 763 if (!error) { 764 /* keep the component name */ 765 cnp->cn_flags |= SAVENAME; 766 error = EJUSTRETURN; 767 } 768 } 769 /* done */ 770 } else { 771 /* try to create/reuse the node */ 772 error = udf_get_node(ump, &icb_loc, &res_node); 773 if (!error) { 774 /* 775 * If we are not at the last path component 776 * and found a non-directory or non-link entry 777 * (which may itself be pointing to a 778 * directory), raise an error. 779 */ 780 vnodetp = res_node->vnode->v_type; 781 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 782 if (!islastcn) 783 error = ENOTDIR; 784 } 785 786 } 787 if (!error) { 788 *vpp = res_node->vnode; 789 } 790 } 791 } 792 793 out: 794 /* 795 * Store result in the cache if requested. If we are creating a file, 796 * the file might not be found and thus putting it into the namecache 797 * might be seen as negative caching. 798 */ 799 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 800 cache_enter(dvp, *vpp, cnp); 801 802 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 803 804 return error; 805 } 806 807 /* --------------------------------------------------------------------- */ 808 809 int 810 udf_getattr(void *v) 811 { 812 struct vop_getattr_args /* { 813 struct vnode *a_vp; 814 struct vattr *a_vap; 815 kauth_cred_t a_cred; 816 struct lwp *a_l; 817 } */ *ap = v; 818 struct vnode *vp = ap->a_vp; 819 struct udf_node *udf_node = VTOI(vp); 820 struct udf_mount *ump = udf_node->ump; 821 struct file_entry *fe = udf_node->fe; 822 struct extfile_entry *efe = udf_node->efe; 823 struct filetimes_extattr_entry *ft_extattr; 824 struct device_extattr_entry *devattr; 825 struct vattr *vap = ap->a_vap; 826 struct timestamp *atime, *mtime, *attrtime, *creatime; 827 uint64_t filesize, blkssize; 828 uint32_t nlink; 829 uint32_t offset, a_l; 830 uint8_t *filedata; 831 uid_t uid; 832 gid_t gid; 833 int error; 834 835 DPRINTF(CALL, ("udf_getattr called\n")); 836 837 /* update times before we returning values */ 838 udf_itimes(udf_node, NULL, NULL, NULL); 839 840 /* get descriptor information */ 841 if (fe) { 842 nlink = udf_rw16(fe->link_cnt); 843 uid = (uid_t)udf_rw32(fe->uid); 844 gid = (gid_t)udf_rw32(fe->gid); 845 filesize = udf_rw64(fe->inf_len); 846 blkssize = udf_rw64(fe->logblks_rec); 847 atime = &fe->atime; 848 mtime = &fe->mtime; 849 attrtime = &fe->attrtime; 850 filedata = fe->data; 851 852 /* initial guess */ 853 creatime = mtime; 854 855 /* check our extended attribute if present */ 856 error = udf_extattr_search_intern(udf_node, 857 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 858 if (!error) { 859 ft_extattr = (struct filetimes_extattr_entry *) 860 (filedata + offset); 861 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 862 creatime = &ft_extattr->times[0]; 863 } 864 } else { 865 assert(udf_node->efe); 866 nlink = udf_rw16(efe->link_cnt); 867 uid = (uid_t)udf_rw32(efe->uid); 868 gid = (gid_t)udf_rw32(efe->gid); 869 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 870 blkssize = udf_rw64(efe->logblks_rec); 871 atime = &efe->atime; 872 mtime = &efe->mtime; 873 attrtime = &efe->attrtime; 874 creatime = &efe->ctime; 875 filedata = efe->data; 876 } 877 878 /* do the uid/gid translation game */ 879 if (uid == (uid_t) -1) 880 uid = ump->mount_args.anon_uid; 881 if (gid == (gid_t) -1) 882 gid = ump->mount_args.anon_gid; 883 884 /* fill in struct vattr with values from the node */ 885 VATTR_NULL(vap); 886 vap->va_type = vp->v_type; 887 vap->va_mode = udf_getaccessmode(udf_node); 888 vap->va_nlink = nlink; 889 vap->va_uid = uid; 890 vap->va_gid = gid; 891 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 892 vap->va_fileid = udf_calchash(&udf_node->loc); /* inode hash XXX */ 893 vap->va_size = filesize; 894 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 895 896 /* 897 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 898 * 1 to the link count if its a directory we're requested attributes 899 * of. 900 */ 901 if (vap->va_type == VDIR) 902 vap->va_nlink++; 903 904 /* access times */ 905 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 906 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 907 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 908 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 909 910 vap->va_gen = 1; /* no multiple generations yes (!?) */ 911 vap->va_flags = 0; /* no flags */ 912 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 913 vap->va_filerev = 1; /* TODO file revision numbers? */ 914 vap->va_vaflags = 0; 915 /* TODO get vaflags from the extended attributes? */ 916 917 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 918 error = udf_extattr_search_intern(udf_node, 919 UDF_DEVICESPEC_ATTR_NO, "", 920 &offset, &a_l); 921 /* if error, deny access */ 922 if (error || (filedata == NULL)) { 923 vap->va_mode = 0; /* or v_type = VNON? */ 924 } else { 925 devattr = (struct device_extattr_entry *) 926 filedata + offset; 927 vap->va_rdev = makedev( 928 udf_rw32(devattr->major), 929 udf_rw32(devattr->minor) 930 ); 931 /* TODO we could check the implementator */ 932 } 933 } 934 935 return 0; 936 } 937 938 /* --------------------------------------------------------------------- */ 939 940 static int 941 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 942 kauth_cred_t cred) 943 { 944 struct udf_node *udf_node = VTOI(vp); 945 uid_t euid, uid; 946 gid_t egid, gid; 947 int issuperuser, ismember; 948 int error; 949 950 #ifdef notyet 951 /* TODO get vaflags from the extended attributes? */ 952 /* Immutable or append-only files cannot be modified, either. */ 953 if (udf_node->flags & (IMMUTABLE | APPEND)) 954 return EPERM; 955 #endif 956 957 if (vp->v_mount->mnt_flag & MNT_RDONLY) 958 return EROFS; 959 960 /* retrieve old values */ 961 udf_getownership(udf_node, &uid, &gid); 962 963 /* only one could be specified */ 964 if (new_uid == VNOVAL) 965 new_uid = uid; 966 if (new_gid == VNOVAL) 967 new_gid = gid; 968 969 /* check if we can fit it in an 32 bits */ 970 if ((uid_t) ((uint32_t) uid) != uid) 971 return EINVAL; 972 if ((gid_t) ((uint32_t) gid) != gid) 973 return EINVAL; 974 975 /* 976 * If we don't own the file, are trying to change the owner of the 977 * file, or are not a member of the target group, the caller's 978 * credentials must imply super-user privilege or the call fails. 979 */ 980 981 /* check permissions */ 982 euid = kauth_cred_geteuid(cred); 983 egid = kauth_cred_getegid(cred); 984 if ((error = kauth_cred_ismember_gid(cred, new_gid, &ismember))) 985 return error; 986 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 987 issuperuser = (error == 0); 988 989 if (!issuperuser) { 990 if ((new_uid != uid) || (euid != uid)) 991 return EPERM; 992 if ((new_gid != gid) && !(egid == new_gid || ismember)) 993 return EPERM; 994 } 995 996 /* change the ownership */ 997 udf_setownership(udf_node, new_uid, new_gid); 998 999 /* mark node changed */ 1000 udf_node->i_flags |= IN_CHANGE; 1001 1002 return 0; 1003 } 1004 1005 1006 static int 1007 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1008 { 1009 struct udf_node *udf_node = VTOI(vp); 1010 uid_t euid, uid; 1011 gid_t egid, gid; 1012 int issuperuser, ismember; 1013 int error; 1014 1015 #ifdef notyet 1016 /* TODO get vaflags from the extended attributes? */ 1017 /* Immutable or append-only files cannot be modified, either. */ 1018 if (udf_node->flags & (IMMUTABLE | APPEND)) 1019 return EPERM; 1020 #endif 1021 1022 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1023 return EROFS; 1024 1025 /* retrieve uid/gid values */ 1026 udf_getownership(udf_node, &uid, &gid); 1027 1028 /* check permissions */ 1029 euid = kauth_cred_geteuid(cred); 1030 egid = kauth_cred_getegid(cred); 1031 if ((error = kauth_cred_ismember_gid(cred, gid, &ismember))) 1032 return error; 1033 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1034 issuperuser = (error == 0); 1035 1036 if ((euid != uid) && !issuperuser) 1037 return EPERM; 1038 if (euid != 0) { 1039 if (vp->v_type != VDIR && (mode & S_ISTXT)) 1040 return EFTYPE; 1041 1042 if ((!ismember) && (mode & S_ISGID)) 1043 return EPERM; 1044 } 1045 1046 /* change mode */ 1047 udf_setaccessmode(udf_node, mode); 1048 1049 /* mark node changed */ 1050 udf_node->i_flags |= IN_CHANGE; 1051 1052 return 0; 1053 } 1054 1055 1056 /* exported */ 1057 int 1058 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1059 { 1060 struct udf_node *udf_node = VTOI(vp); 1061 int error, extended; 1062 1063 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1064 return EROFS; 1065 1066 /* Decide whether this is a valid operation based on the file type. */ 1067 switch (vp->v_type) { 1068 case VDIR: 1069 return EISDIR; 1070 case VREG: 1071 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1072 return EROFS; 1073 break; 1074 case VBLK: 1075 /* FALLTHROUGH */ 1076 case VCHR: 1077 /* FALLTHROUGH */ 1078 case VFIFO: 1079 /* Allow modifications of special files even if in the file 1080 * system is mounted read-only (we are not modifying the 1081 * files themselves, but the objects they represent). */ 1082 return 0; 1083 default: 1084 /* Anything else is unsupported. */ 1085 return EOPNOTSUPP; 1086 } 1087 1088 #if notyet 1089 /* TODO get vaflags from the extended attributes? */ 1090 /* Immutable or append-only files cannot be modified, either. */ 1091 if (node->flags & (IMMUTABLE | APPEND)) 1092 return EPERM; 1093 #endif 1094 1095 /* resize file to the requested size */ 1096 error = udf_resize_node(udf_node, newsize, &extended); 1097 1098 if (error == 0) { 1099 /* mark change */ 1100 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1101 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1102 udf_update(vp, NULL, NULL, NULL, 0); 1103 } 1104 1105 return error; 1106 } 1107 1108 1109 static int 1110 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1111 { 1112 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1113 return EROFS; 1114 1115 /* XXX we can't do this yet XXX */ 1116 1117 return EINVAL; 1118 } 1119 1120 1121 static int 1122 udf_chtimes(struct vnode *vp, 1123 struct timespec *atime, struct timespec *mtime, 1124 struct timespec *birthtime, int setattrflags, 1125 kauth_cred_t cred) 1126 { 1127 struct udf_node *udf_node = VTOI(vp); 1128 uid_t euid, uid; 1129 gid_t gid; 1130 int issuperuser; 1131 int error; 1132 1133 #ifdef notyet 1134 /* TODO get vaflags from the extended attributes? */ 1135 /* Immutable or append-only files cannot be modified, either. */ 1136 if (udf_node->flags & (IMMUTABLE | APPEND)) 1137 return EPERM; 1138 #endif 1139 1140 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1141 return EROFS; 1142 1143 /* retrieve uid/gid values */ 1144 udf_getownership(udf_node, &uid, &gid); 1145 1146 /* check permissions */ 1147 euid = kauth_cred_geteuid(cred); 1148 error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL); 1149 issuperuser = (error == 0); 1150 1151 if (!issuperuser) { 1152 if (euid != uid) 1153 return EPERM; 1154 if ((setattrflags & VA_UTIMES_NULL) == 0) { 1155 error = VOP_ACCESS(vp, VWRITE, cred); 1156 if (error) 1157 return error; 1158 } 1159 } 1160 1161 /* update node flags depending on what times are passed */ 1162 if (atime->tv_sec != VNOVAL) 1163 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1164 udf_node->i_flags |= IN_ACCESS; 1165 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1166 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1167 1168 return udf_update(vp, atime, mtime, birthtime, 0); 1169 } 1170 1171 1172 int 1173 udf_setattr(void *v) 1174 { 1175 struct vop_setattr_args /* { 1176 struct vnode *a_vp; 1177 struct vattr *a_vap; 1178 kauth_cred_t a_cred; 1179 struct lwp *a_l; 1180 } */ *ap = v; 1181 struct vnode *vp = ap->a_vp; 1182 /* struct udf_node *udf_node = VTOI(vp); */ 1183 /* struct udf_mount *ump = udf_node->ump; */ 1184 kauth_cred_t cred = ap->a_cred; 1185 struct vattr *vap = ap->a_vap; 1186 int error; 1187 1188 DPRINTF(CALL, ("udf_setattr called\n")); 1189 1190 /* Abort if any unsettable attribute is given. */ 1191 error = 0; 1192 if (vap->va_type != VNON || 1193 vap->va_nlink != VNOVAL || 1194 vap->va_fsid != VNOVAL || 1195 vap->va_fileid != VNOVAL || 1196 vap->va_blocksize != VNOVAL || 1197 #ifdef notyet 1198 /* checks are debated */ 1199 vap->va_ctime.tv_sec != VNOVAL || 1200 vap->va_ctime.tv_nsec != VNOVAL || 1201 vap->va_birthtime.tv_sec != VNOVAL || 1202 vap->va_birthtime.tv_nsec != VNOVAL || 1203 #endif 1204 vap->va_gen != VNOVAL || 1205 vap->va_rdev != VNOVAL || 1206 vap->va_bytes != VNOVAL) 1207 error = EINVAL; 1208 1209 DPRINTF(ATTR, ("setattr changing:\n")); 1210 if (error == 0 && (vap->va_flags != VNOVAL)) { 1211 DPRINTF(ATTR, ("\tchflags\n")); 1212 error = udf_chflags(vp, vap->va_flags, cred); 1213 } 1214 1215 if (error == 0 && (vap->va_size != VNOVAL)) { 1216 DPRINTF(ATTR, ("\tchsize\n")); 1217 error = udf_chsize(vp, vap->va_size, cred); 1218 } 1219 1220 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1221 DPRINTF(ATTR, ("\tchown\n")); 1222 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1223 } 1224 1225 if (error == 0 && (vap->va_mode != VNOVAL)) { 1226 DPRINTF(ATTR, ("\tchmod\n")); 1227 error = udf_chmod(vp, vap->va_mode, cred); 1228 } 1229 1230 if (error == 0 && 1231 ((vap->va_atime.tv_sec != VNOVAL && 1232 vap->va_atime.tv_nsec != VNOVAL) || 1233 (vap->va_mtime.tv_sec != VNOVAL && 1234 vap->va_mtime.tv_nsec != VNOVAL)) 1235 ) { 1236 DPRINTF(ATTR, ("\tchtimes\n")); 1237 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1238 &vap->va_birthtime, vap->va_vaflags, cred); 1239 } 1240 VN_KNOTE(vp, NOTE_ATTRIB); 1241 1242 return error; 1243 } 1244 1245 /* --------------------------------------------------------------------- */ 1246 1247 /* 1248 * Return POSIX pathconf information for UDF file systems. 1249 */ 1250 int 1251 udf_pathconf(void *v) 1252 { 1253 struct vop_pathconf_args /* { 1254 struct vnode *a_vp; 1255 int a_name; 1256 register_t *a_retval; 1257 } */ *ap = v; 1258 uint32_t bits; 1259 1260 DPRINTF(CALL, ("udf_pathconf called\n")); 1261 1262 switch (ap->a_name) { 1263 case _PC_LINK_MAX: 1264 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1265 return 0; 1266 case _PC_NAME_MAX: 1267 *ap->a_retval = NAME_MAX; 1268 return 0; 1269 case _PC_PATH_MAX: 1270 *ap->a_retval = PATH_MAX; 1271 return 0; 1272 case _PC_PIPE_BUF: 1273 *ap->a_retval = PIPE_BUF; 1274 return 0; 1275 case _PC_CHOWN_RESTRICTED: 1276 *ap->a_retval = 1; 1277 return 0; 1278 case _PC_NO_TRUNC: 1279 *ap->a_retval = 1; 1280 return 0; 1281 case _PC_SYNC_IO: 1282 *ap->a_retval = 0; /* synchronised is off for performance */ 1283 return 0; 1284 case _PC_FILESIZEBITS: 1285 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1286 bits = 64; /* XXX ought to deliver 65 */ 1287 #if 0 1288 if (udf_node) 1289 bits = 64 * vp->v_mount->mnt_dev_bshift; 1290 #endif 1291 *ap->a_retval = bits; 1292 return 0; 1293 } 1294 1295 return EINVAL; 1296 } 1297 1298 1299 /* --------------------------------------------------------------------- */ 1300 1301 int 1302 udf_open(void *v) 1303 { 1304 struct vop_open_args /* { 1305 struct vnode *a_vp; 1306 int a_mode; 1307 kauth_cred_t a_cred; 1308 struct proc *a_p; 1309 } */ *ap = v; 1310 int flags; 1311 1312 DPRINTF(CALL, ("udf_open called\n")); 1313 1314 /* 1315 * Files marked append-only must be opened for appending. 1316 * TODO: get chflags(2) flags from extened attribute. 1317 */ 1318 flags = 0; 1319 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1320 return (EPERM); 1321 1322 return 0; 1323 } 1324 1325 1326 /* --------------------------------------------------------------------- */ 1327 1328 int 1329 udf_close(void *v) 1330 { 1331 struct vop_close_args /* { 1332 struct vnode *a_vp; 1333 int a_fflag; 1334 kauth_cred_t a_cred; 1335 struct proc *a_p; 1336 } */ *ap = v; 1337 struct vnode *vp = ap->a_vp; 1338 struct udf_node *udf_node = VTOI(vp); 1339 1340 DPRINTF(CALL, ("udf_close called\n")); 1341 udf_node = udf_node; /* shut up gcc */ 1342 1343 mutex_enter(&vp->v_interlock); 1344 if (vp->v_usecount > 1) 1345 udf_itimes(udf_node, NULL, NULL, NULL); 1346 mutex_exit(&vp->v_interlock); 1347 1348 return 0; 1349 } 1350 1351 1352 /* --------------------------------------------------------------------- */ 1353 1354 int 1355 udf_access(void *v) 1356 { 1357 struct vop_access_args /* { 1358 struct vnode *a_vp; 1359 int a_mode; 1360 kauth_cred_t a_cred; 1361 struct proc *a_p; 1362 } */ *ap = v; 1363 struct vnode *vp = ap->a_vp; 1364 mode_t mode = ap->a_mode; 1365 kauth_cred_t cred = ap->a_cred; 1366 /* struct udf_node *udf_node = VTOI(vp); */ 1367 struct vattr vap; 1368 int flags; 1369 int error; 1370 1371 DPRINTF(CALL, ("udf_access called\n")); 1372 1373 error = VOP_GETATTR(vp, &vap, NULL); 1374 if (error) 1375 return error; 1376 1377 /* check if we are allowed to write */ 1378 switch (vap.va_type) { 1379 case VDIR: 1380 case VLNK: 1381 case VREG: 1382 /* 1383 * normal nodes: check if we're on a read-only mounted 1384 * filingsystem and bomb out if we're trying to write. 1385 */ 1386 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1387 return EROFS; 1388 break; 1389 case VBLK: 1390 case VCHR: 1391 case VSOCK: 1392 case VFIFO: 1393 /* 1394 * special nodes: even on read-only mounted filingsystems 1395 * these are allowed to be written to if permissions allow. 1396 */ 1397 break; 1398 default: 1399 /* no idea what this is */ 1400 return EINVAL; 1401 } 1402 1403 /* noone may write immutable files */ 1404 /* TODO: get chflags(2) flags from extened attribute. */ 1405 flags = 0; 1406 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1407 return EPERM; 1408 1409 /* ask the generic vaccess to advice on security */ 1410 return vaccess(vp->v_type, 1411 vap.va_mode, vap.va_uid, vap.va_gid, 1412 mode, cred); 1413 } 1414 1415 /* --------------------------------------------------------------------- */ 1416 1417 int 1418 udf_create(void *v) 1419 { 1420 struct vop_create_args /* { 1421 struct vnode *a_dvp; 1422 struct vnode **a_vpp; 1423 struct componentname *a_cnp; 1424 struct vattr *a_vap; 1425 } */ *ap = v; 1426 struct vnode *dvp = ap->a_dvp; 1427 struct vnode **vpp = ap->a_vpp; 1428 struct vattr *vap = ap->a_vap; 1429 struct componentname *cnp = ap->a_cnp; 1430 int error; 1431 1432 DPRINTF(CALL, ("udf_create called\n")); 1433 error = udf_create_node(dvp, vpp, vap, cnp); 1434 1435 if (error || !(cnp->cn_flags & SAVESTART)) 1436 PNBUF_PUT(cnp->cn_pnbuf); 1437 vput(dvp); 1438 return error; 1439 } 1440 1441 /* --------------------------------------------------------------------- */ 1442 1443 int 1444 udf_mknod(void *v) 1445 { 1446 struct vop_mknod_args /* { 1447 struct vnode *a_dvp; 1448 struct vnode **a_vpp; 1449 struct componentname *a_cnp; 1450 struct vattr *a_vap; 1451 } */ *ap = v; 1452 struct vnode *dvp = ap->a_dvp; 1453 struct vnode **vpp = ap->a_vpp; 1454 struct vattr *vap = ap->a_vap; 1455 struct componentname *cnp = ap->a_cnp; 1456 int error; 1457 1458 DPRINTF(CALL, ("udf_mknod called\n")); 1459 error = udf_create_node(dvp, vpp, vap, cnp); 1460 1461 if (error || !(cnp->cn_flags & SAVESTART)) 1462 PNBUF_PUT(cnp->cn_pnbuf); 1463 vput(dvp); 1464 return error; 1465 } 1466 1467 /* --------------------------------------------------------------------- */ 1468 1469 int 1470 udf_mkdir(void *v) 1471 { 1472 struct vop_mkdir_args /* { 1473 struct vnode *a_dvp; 1474 struct vnode **a_vpp; 1475 struct componentname *a_cnp; 1476 struct vattr *a_vap; 1477 } */ *ap = v; 1478 struct vnode *dvp = ap->a_dvp; 1479 struct vnode **vpp = ap->a_vpp; 1480 struct vattr *vap = ap->a_vap; 1481 struct componentname *cnp = ap->a_cnp; 1482 int error; 1483 1484 DPRINTF(CALL, ("udf_mkdir called\n")); 1485 error = udf_create_node(dvp, vpp, vap, cnp); 1486 1487 if (error || !(cnp->cn_flags & SAVESTART)) 1488 PNBUF_PUT(cnp->cn_pnbuf); 1489 vput(dvp); 1490 return error; 1491 } 1492 1493 /* --------------------------------------------------------------------- */ 1494 1495 static int 1496 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1497 { 1498 struct udf_node *udf_node, *dir_node; 1499 struct vattr vap; 1500 int error; 1501 1502 DPRINTF(CALL, ("udf_link called\n")); 1503 error = 0; 1504 1505 /* some quick checks */ 1506 if (vp->v_type == VDIR) 1507 return EPERM; /* can't link a directory */ 1508 if (dvp->v_mount != vp->v_mount) 1509 return EXDEV; /* can't link across devices */ 1510 if (dvp == vp) 1511 return EPERM; /* can't be the same */ 1512 1513 /* lock node */ 1514 error = vn_lock(vp, LK_EXCLUSIVE); 1515 if (error) 1516 return error; 1517 1518 /* get attributes */ 1519 dir_node = VTOI(dvp); 1520 udf_node = VTOI(vp); 1521 1522 error = VOP_GETATTR(vp, &vap, FSCRED); 1523 if (error) 1524 return error; 1525 1526 /* check link count overflow */ 1527 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1528 return EMLINK; 1529 1530 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1531 } 1532 1533 int 1534 udf_link(void *v) 1535 { 1536 struct vop_link_args /* { 1537 struct vnode *a_dvp; 1538 struct vnode *a_vp; 1539 struct componentname *a_cnp; 1540 } */ *ap = v; 1541 struct vnode *dvp = ap->a_dvp; 1542 struct vnode *vp = ap->a_vp; 1543 struct componentname *cnp = ap->a_cnp; 1544 int error; 1545 1546 error = udf_do_link(dvp, vp, cnp); 1547 if (error) 1548 VOP_ABORTOP(dvp, cnp); 1549 1550 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1551 VOP_UNLOCK(vp, 0); 1552 1553 VN_KNOTE(vp, NOTE_LINK); 1554 VN_KNOTE(dvp, NOTE_WRITE); 1555 vput(dvp); 1556 1557 return error; 1558 } 1559 1560 /* --------------------------------------------------------------------- */ 1561 1562 static int 1563 udf_do_symlink(struct udf_node *udf_node, char *target) 1564 { 1565 struct pathcomp pathcomp; 1566 uint8_t *pathbuf, *pathpos, *compnamepos; 1567 char *mntonname; 1568 int pathlen, len, compnamelen, mntonnamelen; 1569 int error; 1570 1571 /* process `target' to an UDF structure */ 1572 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1573 pathpos = pathbuf; 1574 pathlen = 0; 1575 1576 if (*target == '/') { 1577 /* symlink starts from the root */ 1578 len = UDF_PATH_COMP_SIZE; 1579 memset(&pathcomp, 0, len); 1580 pathcomp.type = UDF_PATH_COMP_ROOT; 1581 1582 /* check if its mount-point relative! */ 1583 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1584 mntonnamelen = strlen(mntonname); 1585 if (strlen(target) >= mntonnamelen) { 1586 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1587 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1588 target += mntonnamelen; 1589 } 1590 } else { 1591 target++; 1592 } 1593 1594 memcpy(pathpos, &pathcomp, len); 1595 pathpos += len; 1596 pathlen += len; 1597 } 1598 1599 error = 0; 1600 while (*target) { 1601 /* ignore multiple '/' */ 1602 while (*target == '/') { 1603 target++; 1604 } 1605 if (!*target) 1606 break; 1607 1608 /* extract component name */ 1609 compnamelen = 0; 1610 compnamepos = target; 1611 while ((*target) && (*target != '/')) { 1612 target++; 1613 compnamelen++; 1614 } 1615 1616 /* just trunc if too long ?? (security issue) */ 1617 if (compnamelen >= 127) { 1618 error = ENAMETOOLONG; 1619 break; 1620 } 1621 1622 /* convert unix name to UDF name */ 1623 len = sizeof(struct pathcomp); 1624 memset(&pathcomp, 0, len); 1625 pathcomp.type = UDF_PATH_COMP_NAME; 1626 len = UDF_PATH_COMP_SIZE; 1627 1628 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1629 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1630 if ((compnamelen == 1) && (*compnamepos == '.')) 1631 pathcomp.type = UDF_PATH_COMP_CURDIR; 1632 1633 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1634 unix_to_udf_name( 1635 (char *) &pathcomp.ident, &pathcomp.l_ci, 1636 compnamepos, compnamelen, 1637 &udf_node->ump->logical_vol->desc_charset); 1638 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1639 } 1640 1641 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1642 error = ENAMETOOLONG; 1643 break; 1644 } 1645 1646 memcpy(pathpos, &pathcomp, len); 1647 pathpos += len; 1648 pathlen += len; 1649 } 1650 1651 if (error) { 1652 /* aparently too big */ 1653 free(pathbuf, M_UDFTEMP); 1654 return error; 1655 } 1656 1657 error = udf_grow_node(udf_node, pathlen); 1658 if (error) { 1659 /* failed to pregrow node */ 1660 free(pathbuf, M_UDFTEMP); 1661 return error; 1662 } 1663 1664 /* write out structure on the new file */ 1665 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1666 pathbuf, pathlen, 0, 1667 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1668 FSCRED, NULL, NULL); 1669 if (error) { 1670 /* failed to write out symlink contents */ 1671 free(pathbuf, M_UDFTEMP); 1672 return error; 1673 } 1674 1675 return 0; 1676 } 1677 1678 1679 int 1680 udf_symlink(void *v) 1681 { 1682 struct vop_symlink_args /* { 1683 struct vnode *a_dvp; 1684 struct vnode **a_vpp; 1685 struct componentname *a_cnp; 1686 struct vattr *a_vap; 1687 char *a_target; 1688 } */ *ap = v; 1689 struct vnode *dvp = ap->a_dvp; 1690 struct vnode **vpp = ap->a_vpp; 1691 struct vattr *vap = ap->a_vap; 1692 struct componentname *cnp = ap->a_cnp; 1693 struct udf_node *dir_node; 1694 struct udf_node *udf_node; 1695 int error; 1696 1697 DPRINTF(CALL, ("udf_symlink called\n")); 1698 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1699 error = udf_create_node(dvp, vpp, vap, cnp); 1700 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1701 if (!error) { 1702 dir_node = VTOI(dvp); 1703 udf_node = VTOI(*vpp); 1704 KASSERT(udf_node); 1705 error = udf_do_symlink(udf_node, ap->a_target); 1706 if (error) { 1707 /* remove node */ 1708 udf_shrink_node(udf_node, 0); 1709 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1710 } 1711 } 1712 if (error || !(cnp->cn_flags & SAVESTART)) 1713 PNBUF_PUT(cnp->cn_pnbuf); 1714 vput(dvp); 1715 return error; 1716 } 1717 1718 /* --------------------------------------------------------------------- */ 1719 1720 int 1721 udf_readlink(void *v) 1722 { 1723 struct vop_readlink_args /* { 1724 struct vnode *a_vp; 1725 struct uio *a_uio; 1726 kauth_cred_t a_cred; 1727 } */ *ap = v; 1728 struct vnode *vp = ap->a_vp; 1729 struct uio *uio = ap->a_uio; 1730 kauth_cred_t cred = ap->a_cred; 1731 struct udf_node *udf_node; 1732 struct pathcomp pathcomp; 1733 struct vattr vattr; 1734 uint8_t *pathbuf, *targetbuf, *tmpname; 1735 uint8_t *pathpos, *targetpos; 1736 char *mntonname; 1737 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1738 int first, error; 1739 1740 DPRINTF(CALL, ("udf_readlink called\n")); 1741 1742 udf_node = VTOI(vp); 1743 error = VOP_GETATTR(vp, &vattr, cred); 1744 if (error) 1745 return error; 1746 1747 /* claim temporary buffers for translation */ 1748 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1749 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1750 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1751 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1752 memset(targetbuf, 0, PATH_MAX); 1753 1754 /* read contents of file in our temporary buffer */ 1755 error = vn_rdwr(UIO_READ, udf_node->vnode, 1756 pathbuf, vattr.va_size, 0, 1757 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1758 FSCRED, NULL, NULL); 1759 if (error) { 1760 /* failed to read in symlink contents */ 1761 free(pathbuf, M_UDFTEMP); 1762 free(targetbuf, M_UDFTEMP); 1763 free(tmpname, M_UDFTEMP); 1764 return error; 1765 } 1766 1767 /* convert to a unix path */ 1768 pathpos = pathbuf; 1769 pathlen = 0; 1770 targetpos = targetbuf; 1771 targetlen = PATH_MAX; 1772 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1773 mntonnamelen = strlen(mntonname); 1774 1775 error = 0; 1776 first = 1; 1777 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1778 len = UDF_PATH_COMP_SIZE; 1779 memcpy(&pathcomp, pathpos, len); 1780 l_ci = pathcomp.l_ci; 1781 switch (pathcomp.type) { 1782 case UDF_PATH_COMP_ROOT : 1783 /* XXX should check for l_ci; bugcompatible now */ 1784 if ((targetlen < 1) || !first) { 1785 error = EINVAL; 1786 break; 1787 } 1788 *targetpos++ = '/'; targetlen--; 1789 break; 1790 case UDF_PATH_COMP_MOUNTROOT : 1791 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1792 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1793 error = EINVAL; 1794 break; 1795 } 1796 memcpy(targetpos, mntonname, mntonnamelen); 1797 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1798 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1799 /* more follows, so must be directory */ 1800 *targetpos++ = '/'; targetlen--; 1801 } 1802 break; 1803 case UDF_PATH_COMP_PARENTDIR : 1804 /* XXX should check for l_ci; bugcompatible now */ 1805 if (targetlen < 3) { 1806 error = EINVAL; 1807 break; 1808 } 1809 *targetpos++ = '.'; targetlen--; 1810 *targetpos++ = '.'; targetlen--; 1811 *targetpos++ = '/'; targetlen--; 1812 break; 1813 case UDF_PATH_COMP_CURDIR : 1814 /* XXX should check for l_ci; bugcompatible now */ 1815 if (targetlen < 2) { 1816 error = EINVAL; 1817 break; 1818 } 1819 *targetpos++ = '.'; targetlen--; 1820 *targetpos++ = '/'; targetlen--; 1821 break; 1822 case UDF_PATH_COMP_NAME : 1823 if (l_ci == 0) { 1824 error = EINVAL; 1825 break; 1826 } 1827 memset(tmpname, 0, PATH_MAX); 1828 memcpy(&pathcomp, pathpos, len + l_ci); 1829 udf_to_unix_name(tmpname, MAXPATHLEN, 1830 pathcomp.ident, l_ci, 1831 &udf_node->ump->logical_vol->desc_charset); 1832 namelen = strlen(tmpname); 1833 if (targetlen < namelen + 1) { 1834 error = EINVAL; 1835 break; 1836 } 1837 memcpy(targetpos, tmpname, namelen); 1838 targetpos += namelen; targetlen -= namelen; 1839 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1840 /* more follows, so must be directory */ 1841 *targetpos++ = '/'; targetlen--; 1842 } 1843 break; 1844 default : 1845 error = EINVAL; 1846 break; 1847 } 1848 first = 0; 1849 if (error) 1850 break; 1851 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1852 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1853 1854 } 1855 /* all processed? */ 1856 if (vattr.va_size - pathlen > 0) 1857 error = EINVAL; 1858 1859 /* uiomove() to destination */ 1860 if (!error) 1861 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1862 1863 free(pathbuf, M_UDFTEMP); 1864 free(targetbuf, M_UDFTEMP); 1865 free(tmpname, M_UDFTEMP); 1866 1867 return error; 1868 } 1869 1870 /* --------------------------------------------------------------------- */ 1871 1872 /* note: i tried to follow the logics of the tmpfs rename code */ 1873 int 1874 udf_rename(void *v) 1875 { 1876 struct vop_rename_args /* { 1877 struct vnode *a_fdvp; 1878 struct vnode *a_fvp; 1879 struct componentname *a_fcnp; 1880 struct vnode *a_tdvp; 1881 struct vnode *a_tvp; 1882 struct componentname *a_tcnp; 1883 } */ *ap = v; 1884 struct vnode *tvp = ap->a_tvp; 1885 struct vnode *tdvp = ap->a_tdvp; 1886 struct vnode *fvp = ap->a_fvp; 1887 struct vnode *fdvp = ap->a_fdvp; 1888 struct componentname *tcnp = ap->a_tcnp; 1889 struct componentname *fcnp = ap->a_fcnp; 1890 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1891 struct vattr fvap, tvap; 1892 int error; 1893 1894 DPRINTF(CALL, ("udf_rename called\n")); 1895 1896 /* disallow cross-device renames */ 1897 if (fvp->v_mount != tdvp->v_mount || 1898 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1899 error = EXDEV; 1900 goto out_unlocked; 1901 } 1902 1903 fnode = VTOI(fvp); 1904 fdnode = VTOI(fdvp); 1905 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1906 tdnode = VTOI(tdvp); 1907 1908 /* lock our source dir */ 1909 if (fdnode != tdnode) { 1910 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1911 if (error != 0) 1912 goto out_unlocked; 1913 } 1914 1915 /* get info about the node to be moved */ 1916 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1917 KASSERT(error == 0); 1918 1919 /* check when to delete the old already existing entry */ 1920 if (tvp) { 1921 /* get info about the node to be moved to */ 1922 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1923 KASSERT(error == 0); 1924 1925 /* if both dirs, make sure the destination is empty */ 1926 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1927 if (tvap.va_nlink > 2) { 1928 error = ENOTEMPTY; 1929 goto out; 1930 } 1931 } 1932 /* if moving dir, make sure destination is dir too */ 1933 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1934 error = ENOTDIR; 1935 goto out; 1936 } 1937 /* if we're moving a non-directory, make sure dest is no dir */ 1938 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1939 error = EISDIR; 1940 goto out; 1941 } 1942 } 1943 1944 /* dont allow renaming directories acros directory for now */ 1945 if (fdnode != tdnode) { 1946 if (fvp->v_type == VDIR) { 1947 error = EINVAL; 1948 goto out; 1949 } 1950 } 1951 1952 /* remove existing entry if present */ 1953 if (tvp) 1954 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1955 1956 /* create new directory entry for the node */ 1957 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1958 if (error) 1959 goto out; 1960 1961 /* unlink old directory entry for the node, if failing, unattach new */ 1962 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1963 if (error) 1964 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1965 1966 out: 1967 if (fdnode != tdnode) 1968 VOP_UNLOCK(fdvp, 0); 1969 1970 out_unlocked: 1971 VOP_ABORTOP(tdvp, tcnp); 1972 if (tdvp == tvp) 1973 vrele(tdvp); 1974 else 1975 vput(tdvp); 1976 if (tvp) 1977 vput(tvp); 1978 VOP_ABORTOP(fdvp, fcnp); 1979 1980 /* release source nodes. */ 1981 vrele(fdvp); 1982 vrele(fvp); 1983 1984 return error; 1985 } 1986 1987 /* --------------------------------------------------------------------- */ 1988 1989 int 1990 udf_remove(void *v) 1991 { 1992 struct vop_remove_args /* { 1993 struct vnode *a_dvp; 1994 struct vnode *a_vp; 1995 struct componentname *a_cnp; 1996 } */ *ap = v; 1997 struct vnode *dvp = ap->a_dvp; 1998 struct vnode *vp = ap->a_vp; 1999 struct componentname *cnp = ap->a_cnp; 2000 struct udf_node *dir_node = VTOI(dvp);; 2001 struct udf_node *udf_node = VTOI(vp); 2002 struct udf_mount *ump = dir_node->ump; 2003 int error; 2004 2005 DPRINTF(CALL, ("udf_remove called\n")); 2006 if (vp->v_type != VDIR) { 2007 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2008 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2009 } else { 2010 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2011 error = EPERM; 2012 } 2013 2014 if (error == 0) { 2015 VN_KNOTE(vp, NOTE_DELETE); 2016 VN_KNOTE(dvp, NOTE_WRITE); 2017 } 2018 2019 if (dvp == vp) 2020 vrele(vp); 2021 else 2022 vput(vp); 2023 vput(dvp); 2024 2025 return error; 2026 } 2027 2028 /* --------------------------------------------------------------------- */ 2029 2030 int 2031 udf_rmdir(void *v) 2032 { 2033 struct vop_rmdir_args /* { 2034 struct vnode *a_dvp; 2035 struct vnode *a_vp; 2036 struct componentname *a_cnp; 2037 } */ *ap = v; 2038 struct vnode *vp = ap->a_vp; 2039 struct vnode *dvp = ap->a_dvp; 2040 struct componentname *cnp = ap->a_cnp; 2041 struct udf_node *dir_node = VTOI(dvp);; 2042 struct udf_node *udf_node = VTOI(vp); 2043 struct udf_mount *ump = dir_node->ump; 2044 int refcnt, error; 2045 2046 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2047 2048 /* don't allow '.' to be deleted */ 2049 if (dir_node == udf_node) { 2050 vrele(dvp); 2051 vput(vp); 2052 return EINVAL; 2053 } 2054 2055 /* check to see if the directory is empty */ 2056 error = 0; 2057 if (dir_node->fe) { 2058 refcnt = udf_rw16(udf_node->fe->link_cnt); 2059 } else { 2060 refcnt = udf_rw16(udf_node->efe->link_cnt); 2061 } 2062 if (refcnt > 1) { 2063 /* NOT empty */ 2064 vput(dvp); 2065 vput(vp); 2066 return ENOTEMPTY; 2067 } 2068 2069 /* detach the node from the directory */ 2070 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2071 if (error == 0) { 2072 cache_purge(vp); 2073 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2074 VN_KNOTE(vp, NOTE_DELETE); 2075 } 2076 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2077 2078 /* unput the nodes and exit */ 2079 vput(dvp); 2080 vput(vp); 2081 2082 return error; 2083 } 2084 2085 /* --------------------------------------------------------------------- */ 2086 2087 int 2088 udf_fsync(void *v) 2089 { 2090 struct vop_fsync_args /* { 2091 struct vnode *a_vp; 2092 kauth_cred_t a_cred; 2093 int a_flags; 2094 off_t offlo; 2095 off_t offhi; 2096 struct proc *a_p; 2097 } */ *ap = v; 2098 struct vnode *vp = ap->a_vp; 2099 struct udf_node *udf_node = VTOI(vp); 2100 int error, flags, wait; 2101 2102 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2103 udf_node, 2104 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2105 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2106 2107 /* flush data and wait for it when requested */ 2108 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2109 vflushbuf(vp, wait); 2110 2111 if (udf_node == NULL) { 2112 printf("udf_fsync() called on NULL udf_node!\n"); 2113 return 0; 2114 } 2115 if (vp->v_tag != VT_UDF) { 2116 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2117 return 0; 2118 } 2119 2120 /* set our times */ 2121 udf_itimes(udf_node, NULL, NULL, NULL); 2122 2123 /* if called when mounted readonly, never write back */ 2124 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2125 return 0; 2126 2127 /* if only data is requested, return */ 2128 if (ap->a_flags & FSYNC_DATAONLY) 2129 return 0; 2130 2131 /* check if the node is dirty 'enough'*/ 2132 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2133 if (flags == 0) 2134 return 0; 2135 2136 /* if we don't have to wait, check for IO pending */ 2137 if (!wait) { 2138 if (vp->v_numoutput > 0) { 2139 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2140 return 0; 2141 } 2142 if (udf_node->outstanding_bufs > 0) { 2143 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2144 return 0; 2145 } 2146 if (udf_node->outstanding_nodedscr > 0) { 2147 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2148 return 0; 2149 } 2150 } 2151 2152 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2153 if (wait) { 2154 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2155 mutex_enter(&vp->v_interlock); 2156 while (vp->v_numoutput) { 2157 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2158 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2159 } 2160 mutex_exit(&vp->v_interlock); 2161 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2162 } 2163 2164 /* write out node and wait for it if requested */ 2165 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2166 error = udf_writeout_node(udf_node, wait); 2167 if (error) 2168 return error; 2169 2170 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2171 2172 return 0; 2173 } 2174 2175 /* --------------------------------------------------------------------- */ 2176 2177 int 2178 udf_advlock(void *v) 2179 { 2180 struct vop_advlock_args /* { 2181 struct vnode *a_vp; 2182 void *a_id; 2183 int a_op; 2184 struct flock *a_fl; 2185 int a_flags; 2186 } */ *ap = v; 2187 struct vnode *vp = ap->a_vp; 2188 struct udf_node *udf_node = VTOI(vp); 2189 struct file_entry *fe; 2190 struct extfile_entry *efe; 2191 uint64_t file_size; 2192 2193 DPRINTF(LOCKING, ("udf_advlock called\n")); 2194 2195 /* get directory filesize */ 2196 if (udf_node->fe) { 2197 fe = udf_node->fe; 2198 file_size = udf_rw64(fe->inf_len); 2199 } else { 2200 assert(udf_node->efe); 2201 efe = udf_node->efe; 2202 file_size = udf_rw64(efe->inf_len); 2203 } 2204 2205 return lf_advlock(ap, &udf_node->lockf, file_size); 2206 } 2207 2208 /* --------------------------------------------------------------------- */ 2209 2210 2211 /* Global vfs vnode data structures for udfs */ 2212 int (**udf_vnodeop_p) __P((void *)); 2213 2214 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2215 { &vop_default_desc, vn_default_error }, 2216 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2217 { &vop_create_desc, udf_create }, /* create */ 2218 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2219 { &vop_open_desc, udf_open }, /* open */ 2220 { &vop_close_desc, udf_close }, /* close */ 2221 { &vop_access_desc, udf_access }, /* access */ 2222 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2223 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2224 { &vop_read_desc, udf_read }, /* read */ 2225 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2226 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2227 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2228 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2229 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2230 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2231 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2232 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2233 { &vop_seek_desc, genfs_seek }, /* seek */ 2234 { &vop_remove_desc, udf_remove }, /* remove */ 2235 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2236 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2237 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2238 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2239 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2240 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2241 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2242 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2243 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2244 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2245 { &vop_lock_desc, genfs_lock }, /* lock */ 2246 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2247 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2248 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2249 /* { &vop_print_desc, udf_print }, */ /* print */ 2250 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2251 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2252 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2253 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2254 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2255 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2256 { NULL, NULL } 2257 }; 2258 2259 2260 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2261 &udf_vnodeop_p, udf_vnodeop_entries 2262 }; 2263 2264
Indexes created Thu Oct 02 14:10:14 GMT 2025