1 /* $NetBSD: udf_vnops.c,v 1.52 2009/07/08 14:46:55 reinoud 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 1.52 2009/07/08 14:46:55 reinoud Exp $"); 36 #endif /* not lint */ 37 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/namei.h> 42 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 43 #include <sys/kernel.h> 44 #include <sys/file.h> /* define FWRITE ... */ 45 #include <sys/stat.h> 46 #include <sys/buf.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/dirent.h> 53 #include <sys/lockf.h> 54 #include <sys/kauth.h> 55 56 #include <miscfs/genfs/genfs.h> 57 #include <uvm/uvm_extern.h> 58 59 #include <fs/udf/ecma167-udf.h> 60 #include <fs/udf/udf_mount.h> 61 #include "udf.h" 62 #include "udf_subr.h" 63 #include "udf_bswap.h" 64 65 66 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data) 67 68 69 /* externs */ 70 extern int prtactive; 71 72 /* implementations of vnode functions; table follows at end */ 73 /* --------------------------------------------------------------------- */ 74 75 int 76 udf_inactive(void *v) 77 { 78 struct vop_inactive_args /* { 79 struct vnode *a_vp; 80 bool *a_recycle; 81 } */ *ap = v; 82 struct vnode *vp = ap->a_vp; 83 struct udf_node *udf_node = VTOI(vp); 84 int refcnt; 85 86 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 87 88 if (udf_node == NULL) { 89 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 90 VOP_UNLOCK(vp, 0); 91 return 0; 92 } 93 94 /* 95 * Optionally flush metadata to disc. If the file has not been 96 * referenced anymore in a directory we ought to free up the resources 97 * on disc if applicable. 98 */ 99 if (udf_node->fe) { 100 refcnt = udf_rw16(udf_node->fe->link_cnt); 101 } else { 102 assert(udf_node->efe); 103 refcnt = udf_rw16(udf_node->efe->link_cnt); 104 } 105 106 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) 107 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 108 109 *ap->a_recycle = false; 110 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 111 /* remove this file's allocation */ 112 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 113 *ap->a_recycle = true; 114 udf_delete_node(udf_node); 115 VOP_UNLOCK(vp, 0); 116 vrecycle(vp, NULL, curlwp); 117 return 0; 118 } 119 120 /* write out its node */ 121 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 122 udf_update(vp, NULL, NULL, NULL, 0); 123 VOP_UNLOCK(vp, 0); 124 125 return 0; 126 } 127 128 /* --------------------------------------------------------------------- */ 129 130 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 131 132 int 133 udf_reclaim(void *v) 134 { 135 struct vop_reclaim_args /* { 136 struct vnode *a_vp; 137 } */ *ap = v; 138 struct vnode *vp = ap->a_vp; 139 struct udf_node *udf_node = VTOI(vp); 140 141 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 142 if (prtactive && vp->v_usecount > 1) 143 vprint("udf_reclaim(): pushing active", vp); 144 145 if (udf_node == NULL) { 146 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 147 return 0; 148 } 149 150 /* update note for closure */ 151 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 152 153 /* async check to see if all node descriptors are written out */ 154 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 155 vprint("udf_reclaim(): waiting for writeout\n", vp); 156 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 157 } 158 159 /* purge old data from namei */ 160 cache_purge(vp); 161 162 /* dispose all node knowledge */ 163 udf_dispose_node(udf_node); 164 165 return 0; 166 } 167 168 /* --------------------------------------------------------------------- */ 169 170 int 171 udf_read(void *v) 172 { 173 struct vop_read_args /* { 174 struct vnode *a_vp; 175 struct uio *a_uio; 176 int a_ioflag; 177 kauth_cred_t a_cred; 178 } */ *ap = v; 179 struct vnode *vp = ap->a_vp; 180 struct uio *uio = ap->a_uio; 181 int ioflag = ap->a_ioflag; 182 int advice = IO_ADV_DECODE(ap->a_ioflag); 183 struct uvm_object *uobj; 184 struct udf_node *udf_node = VTOI(vp); 185 struct file_entry *fe; 186 struct extfile_entry *efe; 187 uint64_t file_size; 188 vsize_t len; 189 int error; 190 191 /* 192 * XXX reading from extended attributes not yet implemented. FreeBSD 193 * has it in mind to forward the IO_EXT read call to the 194 * VOP_READEXTATTR(). 195 */ 196 197 DPRINTF(READ, ("udf_read called\n")); 198 199 /* can this happen? some filingsystems have this check */ 200 if (uio->uio_offset < 0) 201 return EINVAL; 202 if (uio->uio_resid == 0) 203 return 0; 204 205 /* protect against rogue programs reading raw directories and links */ 206 if ((ioflag & IO_ALTSEMANTICS) == 0) { 207 if (vp->v_type == VDIR) 208 return EISDIR; 209 /* all but regular files just give EINVAL */ 210 if (vp->v_type != VREG) 211 return EINVAL; 212 } 213 214 assert(udf_node); 215 assert(udf_node->fe || udf_node->efe); 216 217 /* get file/directory filesize */ 218 if (udf_node->fe) { 219 fe = udf_node->fe; 220 file_size = udf_rw64(fe->inf_len); 221 } else { 222 assert(udf_node->efe); 223 efe = udf_node->efe; 224 file_size = udf_rw64(efe->inf_len); 225 } 226 227 /* read contents using buffercache */ 228 uobj = &vp->v_uobj; 229 error = 0; 230 while (uio->uio_resid > 0) { 231 /* reached end? */ 232 if (file_size <= uio->uio_offset) 233 break; 234 235 /* maximise length to file extremity */ 236 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 237 if (len == 0) 238 break; 239 240 /* ubc, here we come, prepare to trap */ 241 error = ubc_uiomove(uobj, uio, len, advice, 242 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 243 if (error) 244 break; 245 } 246 247 /* note access time unless not requested */ 248 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 249 udf_node->i_flags |= IN_ACCESS; 250 if ((ioflag & IO_SYNC) == IO_SYNC) 251 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 252 } 253 254 return error; 255 } 256 257 /* --------------------------------------------------------------------- */ 258 259 int 260 udf_write(void *v) 261 { 262 struct vop_write_args /* { 263 struct vnode *a_vp; 264 struct uio *a_uio; 265 int a_ioflag; 266 kauth_cred_t a_cred; 267 } */ *ap = v; 268 struct vnode *vp = ap->a_vp; 269 struct uio *uio = ap->a_uio; 270 int ioflag = ap->a_ioflag; 271 kauth_cred_t cred = ap->a_cred; 272 int advice = IO_ADV_DECODE(ap->a_ioflag); 273 struct uvm_object *uobj; 274 struct udf_node *udf_node = VTOI(vp); 275 struct file_entry *fe; 276 struct extfile_entry *efe; 277 uint64_t file_size, old_size, old_offset; 278 vsize_t len; 279 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 280 int aflag = ioflag & IO_SYNC ? B_SYNC : 0; 281 int error; 282 int resid, extended; 283 284 /* 285 * XXX writing to extended attributes not yet implemented. FreeBSD has 286 * it in mind to forward the IO_EXT read call to the 287 * VOP_READEXTATTR(). 288 */ 289 290 DPRINTF(WRITE, ("udf_write called\n")); 291 292 /* can this happen? some filingsystems have this check */ 293 if (uio->uio_offset < 0) 294 return EINVAL; 295 if (uio->uio_resid == 0) 296 return 0; 297 298 /* protect against rogue programs writing raw directories or links */ 299 if ((ioflag & IO_ALTSEMANTICS) == 0) { 300 if (vp->v_type == VDIR) 301 return EISDIR; 302 /* all but regular files just give EINVAL for now */ 303 if (vp->v_type != VREG) 304 return EINVAL; 305 } 306 307 assert(udf_node); 308 assert(udf_node->fe || udf_node->efe); 309 310 /* get file/directory filesize */ 311 if (udf_node->fe) { 312 fe = udf_node->fe; 313 file_size = udf_rw64(fe->inf_len); 314 } else { 315 assert(udf_node->efe); 316 efe = udf_node->efe; 317 file_size = udf_rw64(efe->inf_len); 318 } 319 old_size = file_size; 320 321 /* if explicitly asked to append, uio_offset can be wrong? */ 322 if (ioflag & IO_APPEND) 323 uio->uio_offset = file_size; 324 325 extended = (uio->uio_offset + uio->uio_resid > file_size); 326 if (extended) { 327 DPRINTF(WRITE, ("extending file from %"PRIu64" to %"PRIu64"\n", 328 file_size, uio->uio_offset + uio->uio_resid)); 329 error = udf_grow_node(udf_node, uio->uio_offset + uio->uio_resid); 330 if (error) 331 return error; 332 file_size = uio->uio_offset + uio->uio_resid; 333 } 334 335 /* write contents using buffercache */ 336 uobj = &vp->v_uobj; 337 resid = uio->uio_resid; 338 error = 0; 339 340 uvm_vnp_setwritesize(vp, file_size); 341 old_offset = uio->uio_offset; 342 while (uio->uio_resid > 0) { 343 /* maximise length to file extremity */ 344 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 345 if (len == 0) 346 break; 347 348 genfs_node_wrlock(vp); 349 error = GOP_ALLOC(vp, uio->uio_offset, len, aflag, cred); 350 genfs_node_unlock(vp); 351 if (error) 352 break; 353 354 /* ubc, here we come, prepare to trap */ 355 error = ubc_uiomove(uobj, uio, len, advice, 356 UBC_WRITE | UBC_UNMAP_FLAG(vp)); 357 if (error) 358 break; 359 360 /* 361 * flush what we just wrote if necessary. 362 * XXXUBC simplistic async flushing. 363 * 364 * this one works on page sizes. Directories are excluded 365 * since its file data that we want to purge. 366 */ 367 if (!async && (vp->v_type != VDIR) && 368 (uio->uio_offset - old_offset >= PAGE_SIZE)) { 369 mutex_enter(&vp->v_interlock); 370 error = VOP_PUTPAGES(vp, 371 ptoa(atop(old_offset)), 372 ptoa(atop(uio->uio_offset + PAGE_SIZE-1)), 373 PGO_CLEANIT); 374 old_offset = uio->uio_offset; 375 } 376 } 377 uvm_vnp_setsize(vp, file_size); 378 379 /* mark node changed and request update */ 380 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 381 382 /* 383 * XXX TODO FFS has code here to reset setuid & setgid when we're not 384 * the superuser as a precaution against tampering. 385 */ 386 387 /* if we wrote a thing, note write action on vnode */ 388 if (resid > uio->uio_resid) 389 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 390 391 if (error) { 392 /* bring back file size to its former size */ 393 /* take notice of its errors? */ 394 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 395 396 /* roll back uio */ 397 uio->uio_offset -= resid - uio->uio_resid; 398 uio->uio_resid = resid; 399 } else { 400 /* if we write and we're synchronous, update node */ 401 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 402 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 403 } 404 405 return error; 406 } 407 408 409 /* --------------------------------------------------------------------- */ 410 411 /* 412 * `Special' bmap functionality that translates all incomming requests to 413 * translate to vop_strategy() calls with the same blocknumbers effectively 414 * not translating at all. 415 */ 416 417 int 418 udf_trivial_bmap(void *v) 419 { 420 struct vop_bmap_args /* { 421 struct vnode *a_vp; 422 daddr_t a_bn; 423 struct vnode **a_vpp; 424 daddr_t *a_bnp; 425 int *a_runp; 426 } */ *ap = v; 427 struct vnode *vp = ap->a_vp; /* our node */ 428 struct vnode **vpp = ap->a_vpp; /* return node */ 429 daddr_t *bnp = ap->a_bnp; /* translated */ 430 daddr_t bn = ap->a_bn; /* origional */ 431 int *runp = ap->a_runp; 432 struct udf_node *udf_node = VTOI(vp); 433 uint32_t lb_size; 434 435 /* get logical block size */ 436 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 437 438 /* could return `-1' to indicate holes/zeros */ 439 /* translate 1:1 */ 440 *bnp = bn; 441 442 /* set the vnode to read the data from with strategy on itself */ 443 if (vpp) 444 *vpp = vp; 445 446 /* set runlength of maximum block size */ 447 if (runp) 448 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 449 450 /* return success */ 451 return 0; 452 } 453 454 /* --------------------------------------------------------------------- */ 455 456 int 457 udf_vfsstrategy(void *v) 458 { 459 struct vop_strategy_args /* { 460 struct vnode *a_vp; 461 struct buf *a_bp; 462 } */ *ap = v; 463 struct vnode *vp = ap->a_vp; 464 struct buf *bp = ap->a_bp; 465 struct udf_node *udf_node = VTOI(vp); 466 uint32_t lb_size, from, sectors; 467 int error; 468 469 DPRINTF(STRATEGY, ("udf_strategy called\n")); 470 471 /* check if we ought to be here */ 472 if (vp->v_type == VBLK || vp->v_type == VCHR) 473 panic("udf_strategy: spec"); 474 475 /* only filebuffers ought to be read/write by this, no descriptors */ 476 assert(bp->b_blkno >= 0); 477 478 /* get sector size */ 479 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 480 481 /* calculate sector to start from */ 482 from = bp->b_blkno; 483 484 /* calculate length to fetch/store in sectors */ 485 sectors = bp->b_bcount / lb_size; 486 assert(bp->b_bcount > 0); 487 488 /* NEVER assume later that this buffer is already translated */ 489 /* bp->b_lblkno = bp->b_blkno; */ 490 491 /* check assertions: we OUGHT to always get multiples of this */ 492 assert(sectors * lb_size == bp->b_bcount); 493 494 /* issue buffer */ 495 error = 0; 496 if (bp->b_flags & B_READ) { 497 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 498 ", sector %d for %d sectors\n", 499 vp, bp, bp->b_blkno, from, sectors)); 500 501 /* read buffer from the udf_node, translate vtop on the way*/ 502 udf_read_filebuf(udf_node, bp); 503 } else { 504 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 505 ", sector %d for %d sectors\n", 506 vp, bp, bp->b_blkno, from, sectors)); 507 508 /* write buffer to the udf_node, translate vtop on the way*/ 509 udf_write_filebuf(udf_node, bp); 510 } 511 512 return bp->b_error; 513 } 514 515 /* --------------------------------------------------------------------- */ 516 517 int 518 udf_readdir(void *v) 519 { 520 struct vop_readdir_args /* { 521 struct vnode *a_vp; 522 struct uio *a_uio; 523 kauth_cred_t a_cred; 524 int *a_eofflag; 525 off_t **a_cookies; 526 int *a_ncookies; 527 } */ *ap = v; 528 struct uio *uio = ap->a_uio; 529 struct vnode *vp = ap->a_vp; 530 struct udf_node *udf_node = VTOI(vp); 531 struct file_entry *fe; 532 struct extfile_entry *efe; 533 struct fileid_desc *fid; 534 struct dirent *dirent; 535 uint64_t file_size, diroffset, transoffset; 536 uint32_t lb_size; 537 int error; 538 539 DPRINTF(READDIR, ("udf_readdir called\n")); 540 541 /* This operation only makes sense on directory nodes. */ 542 if (vp->v_type != VDIR) 543 return ENOTDIR; 544 545 /* get directory filesize */ 546 if (udf_node->fe) { 547 fe = udf_node->fe; 548 file_size = udf_rw64(fe->inf_len); 549 } else { 550 assert(udf_node->efe); 551 efe = udf_node->efe; 552 file_size = udf_rw64(efe->inf_len); 553 } 554 555 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 556 557 /* 558 * Add `.' pseudo entry if at offset zero since its not in the fid 559 * stream 560 */ 561 if (uio->uio_offset == 0) { 562 DPRINTF(READDIR, ("\t'.' inserted\n")); 563 strcpy(dirent->d_name, "."); 564 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 565 dirent->d_type = DT_DIR; 566 dirent->d_namlen = strlen(dirent->d_name); 567 dirent->d_reclen = _DIRENT_SIZE(dirent); 568 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 569 570 /* mark with magic value that we have done the dummy */ 571 uio->uio_offset = UDF_DIRCOOKIE_DOT; 572 } 573 574 /* we are called just as long as we keep on pushing data in */ 575 error = 0; 576 if (uio->uio_offset < file_size) { 577 /* allocate temporary space for fid */ 578 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 579 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 580 581 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 582 uio->uio_offset = 0; 583 584 diroffset = uio->uio_offset; 585 transoffset = diroffset; 586 while (diroffset < file_size) { 587 DPRINTF(READDIR, ("\tread in fid stream\n")); 588 /* transfer a new fid/dirent */ 589 error = udf_read_fid_stream(vp, &diroffset, 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_get_node_id(&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 uid; 946 gid_t gid; 947 int error; 948 949 #ifdef notyet 950 /* TODO get vaflags from the extended attributes? */ 951 /* Immutable or append-only files cannot be modified, either. */ 952 if (udf_node->flags & (IMMUTABLE | APPEND)) 953 return EPERM; 954 #endif 955 956 if (vp->v_mount->mnt_flag & MNT_RDONLY) 957 return EROFS; 958 959 /* retrieve old values */ 960 udf_getownership(udf_node, &uid, &gid); 961 962 /* only one could be specified */ 963 if (new_uid == VNOVAL) 964 new_uid = uid; 965 if (new_gid == VNOVAL) 966 new_gid = gid; 967 968 /* check if we can fit it in an 32 bits */ 969 if ((uid_t) ((uint32_t) uid) != uid) 970 return EINVAL; 971 if ((gid_t) ((uint32_t) gid) != gid) 972 return EINVAL; 973 974 /* check permissions */ 975 error = genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid); 976 if (error) 977 return (error); 978 979 /* change the ownership */ 980 udf_setownership(udf_node, new_uid, new_gid); 981 982 /* mark node changed */ 983 udf_node->i_flags |= IN_CHANGE; 984 985 return 0; 986 } 987 988 989 static int 990 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 991 { 992 struct udf_node *udf_node = VTOI(vp); 993 uid_t uid; 994 gid_t gid; 995 int error; 996 997 #ifdef notyet 998 /* TODO get vaflags from the extended attributes? */ 999 /* Immutable or append-only files cannot be modified, either. */ 1000 if (udf_node->flags & (IMMUTABLE | APPEND)) 1001 return EPERM; 1002 #endif 1003 1004 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1005 return EROFS; 1006 1007 /* retrieve uid/gid values */ 1008 udf_getownership(udf_node, &uid, &gid); 1009 1010 /* check permissions */ 1011 error = genfs_can_chmod(vp, cred, uid, gid, mode); 1012 if (error) 1013 return (error); 1014 1015 /* change mode */ 1016 udf_setaccessmode(udf_node, mode); 1017 1018 /* mark node changed */ 1019 udf_node->i_flags |= IN_CHANGE; 1020 1021 return 0; 1022 } 1023 1024 1025 /* exported */ 1026 int 1027 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1028 { 1029 struct udf_node *udf_node = VTOI(vp); 1030 int error, extended; 1031 1032 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1033 return EROFS; 1034 1035 /* Decide whether this is a valid operation based on the file type. */ 1036 switch (vp->v_type) { 1037 case VDIR: 1038 return EISDIR; 1039 case VREG: 1040 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1041 return EROFS; 1042 break; 1043 case VBLK: 1044 /* FALLTHROUGH */ 1045 case VCHR: 1046 /* FALLTHROUGH */ 1047 case VFIFO: 1048 /* Allow modifications of special files even if in the file 1049 * system is mounted read-only (we are not modifying the 1050 * files themselves, but the objects they represent). */ 1051 return 0; 1052 default: 1053 /* Anything else is unsupported. */ 1054 return EOPNOTSUPP; 1055 } 1056 1057 #if notyet 1058 /* TODO get vaflags from the extended attributes? */ 1059 /* Immutable or append-only files cannot be modified, either. */ 1060 if (node->flags & (IMMUTABLE | APPEND)) 1061 return EPERM; 1062 #endif 1063 1064 /* resize file to the requested size */ 1065 error = udf_resize_node(udf_node, newsize, &extended); 1066 1067 if (error == 0) { 1068 /* mark change */ 1069 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1070 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1071 udf_update(vp, NULL, NULL, NULL, 0); 1072 } 1073 1074 return error; 1075 } 1076 1077 1078 static int 1079 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1080 { 1081 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1082 return EROFS; 1083 1084 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1085 1086 return 0; 1087 } 1088 1089 1090 static int 1091 udf_chtimes(struct vnode *vp, 1092 struct timespec *atime, struct timespec *mtime, 1093 struct timespec *birthtime, int setattrflags, 1094 kauth_cred_t cred) 1095 { 1096 struct udf_node *udf_node = VTOI(vp); 1097 uid_t uid; 1098 gid_t gid; 1099 int error; 1100 1101 #ifdef notyet 1102 /* TODO get vaflags from the extended attributes? */ 1103 /* Immutable or append-only files cannot be modified, either. */ 1104 if (udf_node->flags & (IMMUTABLE | APPEND)) 1105 return EPERM; 1106 #endif 1107 1108 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1109 return EROFS; 1110 1111 /* retrieve uid/gid values */ 1112 udf_getownership(udf_node, &uid, &gid); 1113 1114 /* check permissions */ 1115 error = genfs_can_chtimes(vp, setattrflags, uid, cred); 1116 if (error) 1117 return (error); 1118 1119 /* update node flags depending on what times are passed */ 1120 if (atime->tv_sec != VNOVAL) 1121 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1122 udf_node->i_flags |= IN_ACCESS; 1123 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1124 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1125 1126 return udf_update(vp, atime, mtime, birthtime, 0); 1127 } 1128 1129 1130 int 1131 udf_setattr(void *v) 1132 { 1133 struct vop_setattr_args /* { 1134 struct vnode *a_vp; 1135 struct vattr *a_vap; 1136 kauth_cred_t a_cred; 1137 struct lwp *a_l; 1138 } */ *ap = v; 1139 struct vnode *vp = ap->a_vp; 1140 /* struct udf_node *udf_node = VTOI(vp); */ 1141 /* struct udf_mount *ump = udf_node->ump; */ 1142 kauth_cred_t cred = ap->a_cred; 1143 struct vattr *vap = ap->a_vap; 1144 int error; 1145 1146 DPRINTF(CALL, ("udf_setattr called\n")); 1147 1148 /* Abort if any unsettable attribute is given. */ 1149 error = 0; 1150 if (vap->va_type != VNON || 1151 vap->va_nlink != VNOVAL || 1152 vap->va_fsid != VNOVAL || 1153 vap->va_fileid != VNOVAL || 1154 vap->va_blocksize != VNOVAL || 1155 #ifdef notyet 1156 /* checks are debated */ 1157 vap->va_ctime.tv_sec != VNOVAL || 1158 vap->va_ctime.tv_nsec != VNOVAL || 1159 vap->va_birthtime.tv_sec != VNOVAL || 1160 vap->va_birthtime.tv_nsec != VNOVAL || 1161 #endif 1162 vap->va_gen != VNOVAL || 1163 vap->va_rdev != VNOVAL || 1164 vap->va_bytes != VNOVAL) 1165 error = EINVAL; 1166 1167 DPRINTF(ATTR, ("setattr changing:\n")); 1168 if (error == 0 && (vap->va_flags != VNOVAL)) { 1169 DPRINTF(ATTR, ("\tchflags\n")); 1170 error = udf_chflags(vp, vap->va_flags, cred); 1171 } 1172 1173 if (error == 0 && (vap->va_size != VNOVAL)) { 1174 DPRINTF(ATTR, ("\tchsize\n")); 1175 error = udf_chsize(vp, vap->va_size, cred); 1176 } 1177 1178 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1179 DPRINTF(ATTR, ("\tchown\n")); 1180 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1181 } 1182 1183 if (error == 0 && (vap->va_mode != VNOVAL)) { 1184 DPRINTF(ATTR, ("\tchmod\n")); 1185 error = udf_chmod(vp, vap->va_mode, cred); 1186 } 1187 1188 if (error == 0 && 1189 ((vap->va_atime.tv_sec != VNOVAL && 1190 vap->va_atime.tv_nsec != VNOVAL) || 1191 (vap->va_mtime.tv_sec != VNOVAL && 1192 vap->va_mtime.tv_nsec != VNOVAL)) 1193 ) { 1194 DPRINTF(ATTR, ("\tchtimes\n")); 1195 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1196 &vap->va_birthtime, vap->va_vaflags, cred); 1197 } 1198 VN_KNOTE(vp, NOTE_ATTRIB); 1199 1200 return error; 1201 } 1202 1203 /* --------------------------------------------------------------------- */ 1204 1205 /* 1206 * Return POSIX pathconf information for UDF file systems. 1207 */ 1208 int 1209 udf_pathconf(void *v) 1210 { 1211 struct vop_pathconf_args /* { 1212 struct vnode *a_vp; 1213 int a_name; 1214 register_t *a_retval; 1215 } */ *ap = v; 1216 uint32_t bits; 1217 1218 DPRINTF(CALL, ("udf_pathconf called\n")); 1219 1220 switch (ap->a_name) { 1221 case _PC_LINK_MAX: 1222 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1223 return 0; 1224 case _PC_NAME_MAX: 1225 *ap->a_retval = NAME_MAX; 1226 return 0; 1227 case _PC_PATH_MAX: 1228 *ap->a_retval = PATH_MAX; 1229 return 0; 1230 case _PC_PIPE_BUF: 1231 *ap->a_retval = PIPE_BUF; 1232 return 0; 1233 case _PC_CHOWN_RESTRICTED: 1234 *ap->a_retval = 1; 1235 return 0; 1236 case _PC_NO_TRUNC: 1237 *ap->a_retval = 1; 1238 return 0; 1239 case _PC_SYNC_IO: 1240 *ap->a_retval = 0; /* synchronised is off for performance */ 1241 return 0; 1242 case _PC_FILESIZEBITS: 1243 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1244 bits = 64; /* XXX ought to deliver 65 */ 1245 #if 0 1246 if (udf_node) 1247 bits = 64 * vp->v_mount->mnt_dev_bshift; 1248 #endif 1249 *ap->a_retval = bits; 1250 return 0; 1251 } 1252 1253 return EINVAL; 1254 } 1255 1256 1257 /* --------------------------------------------------------------------- */ 1258 1259 int 1260 udf_open(void *v) 1261 { 1262 struct vop_open_args /* { 1263 struct vnode *a_vp; 1264 int a_mode; 1265 kauth_cred_t a_cred; 1266 struct proc *a_p; 1267 } */ *ap = v; 1268 int flags; 1269 1270 DPRINTF(CALL, ("udf_open called\n")); 1271 1272 /* 1273 * Files marked append-only must be opened for appending. 1274 * TODO: get chflags(2) flags from extened attribute. 1275 */ 1276 flags = 0; 1277 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1278 return (EPERM); 1279 1280 return 0; 1281 } 1282 1283 1284 /* --------------------------------------------------------------------- */ 1285 1286 int 1287 udf_close(void *v) 1288 { 1289 struct vop_close_args /* { 1290 struct vnode *a_vp; 1291 int a_fflag; 1292 kauth_cred_t a_cred; 1293 struct proc *a_p; 1294 } */ *ap = v; 1295 struct vnode *vp = ap->a_vp; 1296 struct udf_node *udf_node = VTOI(vp); 1297 1298 DPRINTF(CALL, ("udf_close called\n")); 1299 udf_node = udf_node; /* shut up gcc */ 1300 1301 mutex_enter(&vp->v_interlock); 1302 if (vp->v_usecount > 1) 1303 udf_itimes(udf_node, NULL, NULL, NULL); 1304 mutex_exit(&vp->v_interlock); 1305 1306 return 0; 1307 } 1308 1309 1310 /* --------------------------------------------------------------------- */ 1311 1312 static int 1313 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1314 { 1315 int flags; 1316 1317 /* check if we are allowed to write */ 1318 switch (vap->va_type) { 1319 case VDIR: 1320 case VLNK: 1321 case VREG: 1322 /* 1323 * normal nodes: check if we're on a read-only mounted 1324 * filingsystem and bomb out if we're trying to write. 1325 */ 1326 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1327 return EROFS; 1328 break; 1329 case VBLK: 1330 case VCHR: 1331 case VSOCK: 1332 case VFIFO: 1333 /* 1334 * special nodes: even on read-only mounted filingsystems 1335 * these are allowed to be written to if permissions allow. 1336 */ 1337 break; 1338 default: 1339 /* no idea what this is */ 1340 return EINVAL; 1341 } 1342 1343 /* noone may write immutable files */ 1344 /* TODO: get chflags(2) flags from extened attribute. */ 1345 flags = 0; 1346 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1347 return EPERM; 1348 1349 return 0; 1350 } 1351 1352 static int 1353 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1354 kauth_cred_t cred) 1355 { 1356 1357 /* ask the generic genfs_can_access to advice on security */ 1358 return genfs_can_access(vp->v_type, 1359 vap->va_mode, vap->va_uid, vap->va_gid, 1360 mode, cred); 1361 } 1362 1363 int 1364 udf_access(void *v) 1365 { 1366 struct vop_access_args /* { 1367 struct vnode *a_vp; 1368 int a_mode; 1369 kauth_cred_t a_cred; 1370 struct proc *a_p; 1371 } */ *ap = v; 1372 struct vnode *vp = ap->a_vp; 1373 mode_t mode = ap->a_mode; 1374 kauth_cred_t cred = ap->a_cred; 1375 /* struct udf_node *udf_node = VTOI(vp); */ 1376 struct vattr vap; 1377 int error; 1378 1379 DPRINTF(CALL, ("udf_access called\n")); 1380 1381 error = VOP_GETATTR(vp, &vap, NULL); 1382 if (error) 1383 return error; 1384 1385 error = udf_check_possible(vp, &vap, mode); 1386 if (error) 1387 return error; 1388 1389 error = udf_check_permitted(vp, &vap, mode, cred); 1390 1391 return error; 1392 } 1393 1394 /* --------------------------------------------------------------------- */ 1395 1396 int 1397 udf_create(void *v) 1398 { 1399 struct vop_create_args /* { 1400 struct vnode *a_dvp; 1401 struct vnode **a_vpp; 1402 struct componentname *a_cnp; 1403 struct vattr *a_vap; 1404 } */ *ap = v; 1405 struct vnode *dvp = ap->a_dvp; 1406 struct vnode **vpp = ap->a_vpp; 1407 struct vattr *vap = ap->a_vap; 1408 struct componentname *cnp = ap->a_cnp; 1409 int error; 1410 1411 DPRINTF(CALL, ("udf_create called\n")); 1412 error = udf_create_node(dvp, vpp, vap, cnp); 1413 1414 if (error || !(cnp->cn_flags & SAVESTART)) 1415 PNBUF_PUT(cnp->cn_pnbuf); 1416 vput(dvp); 1417 return error; 1418 } 1419 1420 /* --------------------------------------------------------------------- */ 1421 1422 int 1423 udf_mknod(void *v) 1424 { 1425 struct vop_mknod_args /* { 1426 struct vnode *a_dvp; 1427 struct vnode **a_vpp; 1428 struct componentname *a_cnp; 1429 struct vattr *a_vap; 1430 } */ *ap = v; 1431 struct vnode *dvp = ap->a_dvp; 1432 struct vnode **vpp = ap->a_vpp; 1433 struct vattr *vap = ap->a_vap; 1434 struct componentname *cnp = ap->a_cnp; 1435 int error; 1436 1437 DPRINTF(CALL, ("udf_mknod called\n")); 1438 error = udf_create_node(dvp, vpp, vap, cnp); 1439 1440 if (error || !(cnp->cn_flags & SAVESTART)) 1441 PNBUF_PUT(cnp->cn_pnbuf); 1442 vput(dvp); 1443 return error; 1444 } 1445 1446 /* --------------------------------------------------------------------- */ 1447 1448 int 1449 udf_mkdir(void *v) 1450 { 1451 struct vop_mkdir_args /* { 1452 struct vnode *a_dvp; 1453 struct vnode **a_vpp; 1454 struct componentname *a_cnp; 1455 struct vattr *a_vap; 1456 } */ *ap = v; 1457 struct vnode *dvp = ap->a_dvp; 1458 struct vnode **vpp = ap->a_vpp; 1459 struct vattr *vap = ap->a_vap; 1460 struct componentname *cnp = ap->a_cnp; 1461 int error; 1462 1463 DPRINTF(CALL, ("udf_mkdir called\n")); 1464 error = udf_create_node(dvp, vpp, vap, cnp); 1465 1466 if (error || !(cnp->cn_flags & SAVESTART)) 1467 PNBUF_PUT(cnp->cn_pnbuf); 1468 vput(dvp); 1469 return error; 1470 } 1471 1472 /* --------------------------------------------------------------------- */ 1473 1474 static int 1475 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1476 { 1477 struct udf_node *udf_node, *dir_node; 1478 struct vattr vap; 1479 int error; 1480 1481 DPRINTF(CALL, ("udf_link called\n")); 1482 error = 0; 1483 1484 /* some quick checks */ 1485 if (vp->v_type == VDIR) 1486 return EPERM; /* can't link a directory */ 1487 if (dvp->v_mount != vp->v_mount) 1488 return EXDEV; /* can't link across devices */ 1489 if (dvp == vp) 1490 return EPERM; /* can't be the same */ 1491 1492 /* lock node */ 1493 error = vn_lock(vp, LK_EXCLUSIVE); 1494 if (error) 1495 return error; 1496 1497 /* get attributes */ 1498 dir_node = VTOI(dvp); 1499 udf_node = VTOI(vp); 1500 1501 error = VOP_GETATTR(vp, &vap, FSCRED); 1502 if (error) 1503 return error; 1504 1505 /* check link count overflow */ 1506 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1507 return EMLINK; 1508 1509 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1510 } 1511 1512 int 1513 udf_link(void *v) 1514 { 1515 struct vop_link_args /* { 1516 struct vnode *a_dvp; 1517 struct vnode *a_vp; 1518 struct componentname *a_cnp; 1519 } */ *ap = v; 1520 struct vnode *dvp = ap->a_dvp; 1521 struct vnode *vp = ap->a_vp; 1522 struct componentname *cnp = ap->a_cnp; 1523 int error; 1524 1525 error = udf_do_link(dvp, vp, cnp); 1526 if (error) 1527 VOP_ABORTOP(dvp, cnp); 1528 1529 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1530 VOP_UNLOCK(vp, 0); 1531 1532 VN_KNOTE(vp, NOTE_LINK); 1533 VN_KNOTE(dvp, NOTE_WRITE); 1534 vput(dvp); 1535 1536 return error; 1537 } 1538 1539 /* --------------------------------------------------------------------- */ 1540 1541 static int 1542 udf_do_symlink(struct udf_node *udf_node, char *target) 1543 { 1544 struct pathcomp pathcomp; 1545 uint8_t *pathbuf, *pathpos, *compnamepos; 1546 char *mntonname; 1547 int pathlen, len, compnamelen, mntonnamelen; 1548 int error; 1549 1550 /* process `target' to an UDF structure */ 1551 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1552 pathpos = pathbuf; 1553 pathlen = 0; 1554 1555 if (*target == '/') { 1556 /* symlink starts from the root */ 1557 len = UDF_PATH_COMP_SIZE; 1558 memset(&pathcomp, 0, len); 1559 pathcomp.type = UDF_PATH_COMP_ROOT; 1560 1561 /* check if its mount-point relative! */ 1562 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1563 mntonnamelen = strlen(mntonname); 1564 if (strlen(target) >= mntonnamelen) { 1565 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1566 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1567 target += mntonnamelen; 1568 } 1569 } else { 1570 target++; 1571 } 1572 1573 memcpy(pathpos, &pathcomp, len); 1574 pathpos += len; 1575 pathlen += len; 1576 } 1577 1578 error = 0; 1579 while (*target) { 1580 /* ignore multiple '/' */ 1581 while (*target == '/') { 1582 target++; 1583 } 1584 if (!*target) 1585 break; 1586 1587 /* extract component name */ 1588 compnamelen = 0; 1589 compnamepos = target; 1590 while ((*target) && (*target != '/')) { 1591 target++; 1592 compnamelen++; 1593 } 1594 1595 /* just trunc if too long ?? (security issue) */ 1596 if (compnamelen >= 127) { 1597 error = ENAMETOOLONG; 1598 break; 1599 } 1600 1601 /* convert unix name to UDF name */ 1602 len = sizeof(struct pathcomp); 1603 memset(&pathcomp, 0, len); 1604 pathcomp.type = UDF_PATH_COMP_NAME; 1605 len = UDF_PATH_COMP_SIZE; 1606 1607 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1608 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1609 if ((compnamelen == 1) && (*compnamepos == '.')) 1610 pathcomp.type = UDF_PATH_COMP_CURDIR; 1611 1612 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1613 unix_to_udf_name( 1614 (char *) &pathcomp.ident, &pathcomp.l_ci, 1615 compnamepos, compnamelen, 1616 &udf_node->ump->logical_vol->desc_charset); 1617 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1618 } 1619 1620 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1621 error = ENAMETOOLONG; 1622 break; 1623 } 1624 1625 memcpy(pathpos, &pathcomp, len); 1626 pathpos += len; 1627 pathlen += len; 1628 } 1629 1630 if (error) { 1631 /* aparently too big */ 1632 free(pathbuf, M_UDFTEMP); 1633 return error; 1634 } 1635 1636 error = udf_grow_node(udf_node, pathlen); 1637 if (error) { 1638 /* failed to pregrow node */ 1639 free(pathbuf, M_UDFTEMP); 1640 return error; 1641 } 1642 1643 /* write out structure on the new file */ 1644 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1645 pathbuf, pathlen, 0, 1646 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1647 FSCRED, NULL, NULL); 1648 1649 /* return status of symlink contents writeout */ 1650 free(pathbuf, M_UDFTEMP); 1651 return error; 1652 } 1653 1654 1655 int 1656 udf_symlink(void *v) 1657 { 1658 struct vop_symlink_args /* { 1659 struct vnode *a_dvp; 1660 struct vnode **a_vpp; 1661 struct componentname *a_cnp; 1662 struct vattr *a_vap; 1663 char *a_target; 1664 } */ *ap = v; 1665 struct vnode *dvp = ap->a_dvp; 1666 struct vnode **vpp = ap->a_vpp; 1667 struct vattr *vap = ap->a_vap; 1668 struct componentname *cnp = ap->a_cnp; 1669 struct udf_node *dir_node; 1670 struct udf_node *udf_node; 1671 int error; 1672 1673 DPRINTF(CALL, ("udf_symlink called\n")); 1674 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1675 error = udf_create_node(dvp, vpp, vap, cnp); 1676 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1677 if (!error) { 1678 dir_node = VTOI(dvp); 1679 udf_node = VTOI(*vpp); 1680 KASSERT(udf_node); 1681 error = udf_do_symlink(udf_node, ap->a_target); 1682 if (error) { 1683 /* remove node */ 1684 udf_shrink_node(udf_node, 0); 1685 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1686 } 1687 } 1688 if (error || !(cnp->cn_flags & SAVESTART)) 1689 PNBUF_PUT(cnp->cn_pnbuf); 1690 vput(dvp); 1691 return error; 1692 } 1693 1694 /* --------------------------------------------------------------------- */ 1695 1696 int 1697 udf_readlink(void *v) 1698 { 1699 struct vop_readlink_args /* { 1700 struct vnode *a_vp; 1701 struct uio *a_uio; 1702 kauth_cred_t a_cred; 1703 } */ *ap = v; 1704 struct vnode *vp = ap->a_vp; 1705 struct uio *uio = ap->a_uio; 1706 kauth_cred_t cred = ap->a_cred; 1707 struct udf_node *udf_node; 1708 struct pathcomp pathcomp; 1709 struct vattr vattr; 1710 uint8_t *pathbuf, *targetbuf, *tmpname; 1711 uint8_t *pathpos, *targetpos; 1712 char *mntonname; 1713 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1714 int first, error; 1715 1716 DPRINTF(CALL, ("udf_readlink called\n")); 1717 1718 udf_node = VTOI(vp); 1719 error = VOP_GETATTR(vp, &vattr, cred); 1720 if (error) 1721 return error; 1722 1723 /* claim temporary buffers for translation */ 1724 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1725 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1726 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1727 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1728 memset(targetbuf, 0, PATH_MAX); 1729 1730 /* read contents of file in our temporary buffer */ 1731 error = vn_rdwr(UIO_READ, udf_node->vnode, 1732 pathbuf, vattr.va_size, 0, 1733 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1734 FSCRED, NULL, NULL); 1735 if (error) { 1736 /* failed to read in symlink contents */ 1737 free(pathbuf, M_UDFTEMP); 1738 free(targetbuf, M_UDFTEMP); 1739 free(tmpname, M_UDFTEMP); 1740 return error; 1741 } 1742 1743 /* convert to a unix path */ 1744 pathpos = pathbuf; 1745 pathlen = 0; 1746 targetpos = targetbuf; 1747 targetlen = PATH_MAX; 1748 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1749 mntonnamelen = strlen(mntonname); 1750 1751 error = 0; 1752 first = 1; 1753 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1754 len = UDF_PATH_COMP_SIZE; 1755 memcpy(&pathcomp, pathpos, len); 1756 l_ci = pathcomp.l_ci; 1757 switch (pathcomp.type) { 1758 case UDF_PATH_COMP_ROOT : 1759 /* XXX should check for l_ci; bugcompatible now */ 1760 if ((targetlen < 1) || !first) { 1761 error = EINVAL; 1762 break; 1763 } 1764 *targetpos++ = '/'; targetlen--; 1765 break; 1766 case UDF_PATH_COMP_MOUNTROOT : 1767 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1768 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1769 error = EINVAL; 1770 break; 1771 } 1772 memcpy(targetpos, mntonname, mntonnamelen); 1773 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1774 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1775 /* more follows, so must be directory */ 1776 *targetpos++ = '/'; targetlen--; 1777 } 1778 break; 1779 case UDF_PATH_COMP_PARENTDIR : 1780 /* XXX should check for l_ci; bugcompatible now */ 1781 if (targetlen < 3) { 1782 error = EINVAL; 1783 break; 1784 } 1785 *targetpos++ = '.'; targetlen--; 1786 *targetpos++ = '.'; targetlen--; 1787 *targetpos++ = '/'; targetlen--; 1788 break; 1789 case UDF_PATH_COMP_CURDIR : 1790 /* XXX should check for l_ci; bugcompatible now */ 1791 if (targetlen < 2) { 1792 error = EINVAL; 1793 break; 1794 } 1795 *targetpos++ = '.'; targetlen--; 1796 *targetpos++ = '/'; targetlen--; 1797 break; 1798 case UDF_PATH_COMP_NAME : 1799 if (l_ci == 0) { 1800 error = EINVAL; 1801 break; 1802 } 1803 memset(tmpname, 0, PATH_MAX); 1804 memcpy(&pathcomp, pathpos, len + l_ci); 1805 udf_to_unix_name(tmpname, MAXPATHLEN, 1806 pathcomp.ident, l_ci, 1807 &udf_node->ump->logical_vol->desc_charset); 1808 namelen = strlen(tmpname); 1809 if (targetlen < namelen + 1) { 1810 error = EINVAL; 1811 break; 1812 } 1813 memcpy(targetpos, tmpname, namelen); 1814 targetpos += namelen; targetlen -= namelen; 1815 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1816 /* more follows, so must be directory */ 1817 *targetpos++ = '/'; targetlen--; 1818 } 1819 break; 1820 default : 1821 error = EINVAL; 1822 break; 1823 } 1824 first = 0; 1825 if (error) 1826 break; 1827 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1828 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1829 1830 } 1831 /* all processed? */ 1832 if (vattr.va_size - pathlen > 0) 1833 error = EINVAL; 1834 1835 /* uiomove() to destination */ 1836 if (!error) 1837 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1838 1839 free(pathbuf, M_UDFTEMP); 1840 free(targetbuf, M_UDFTEMP); 1841 free(tmpname, M_UDFTEMP); 1842 1843 return error; 1844 } 1845 1846 /* --------------------------------------------------------------------- */ 1847 1848 /* 1849 * Check if source directory is in the path of the target directory. Target 1850 * is supplied locked, source is unlocked. The target is always vput before 1851 * returning. Modeled after UFS. 1852 * 1853 * If source is on the path from target to the root, return error. 1854 */ 1855 1856 static int 1857 udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1858 { 1859 struct udf_mount *ump = target->ump; 1860 struct udf_node *res_node; 1861 struct long_ad icb_loc, *root_icb; 1862 const char *name; 1863 int namelen; 1864 int error, found; 1865 1866 name = ".."; 1867 namelen = 2; 1868 error = 0; 1869 res_node = target; 1870 1871 root_icb = &ump->fileset_desc->rootdir_icb; 1872 1873 /* if nodes are equal, it is no use looking */ 1874 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1875 error = EEXIST; 1876 goto out; 1877 } 1878 1879 /* nothing can exist before the root */ 1880 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1881 error = 0; 1882 goto out; 1883 } 1884 1885 for (;;) { 1886 DPRINTF(NODE, ("udf_on_rootpath : " 1887 "source vp %p, looking at vp %p\n", 1888 source->vnode, res_node->vnode)); 1889 1890 /* sanity check */ 1891 if (res_node->vnode->v_type != VDIR) { 1892 error = ENOTDIR; 1893 goto out; 1894 } 1895 1896 /* go down one level */ 1897 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1898 &icb_loc, &found); 1899 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1900 "found %d\n", error, found)); 1901 1902 if (!found) 1903 error = ENOENT; 1904 if (error) 1905 goto out; 1906 1907 /* did we encounter source node? */ 1908 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1909 error = EINVAL; 1910 goto out; 1911 } 1912 1913 /* did we encounter the root node? */ 1914 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1915 error = 0; 1916 goto out; 1917 } 1918 1919 /* push our intermediate node, we're done with it */ 1920 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1921 vput(res_node->vnode); 1922 1923 DPRINTF(NODE, ("\tgetting the .. node\n")); 1924 error = udf_get_node(ump, &icb_loc, &res_node); 1925 1926 if (error) { /* argh, bail out */ 1927 KASSERT(res_node == NULL); 1928 // res_node = NULL; 1929 goto out; 1930 } 1931 } 1932 out: 1933 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1934 1935 /* put our last node */ 1936 if (res_node) 1937 vput(res_node->vnode); 1938 1939 return error; 1940 } 1941 1942 /* note: i tried to follow the logics of the tmpfs rename code */ 1943 int 1944 udf_rename(void *v) 1945 { 1946 struct vop_rename_args /* { 1947 struct vnode *a_fdvp; 1948 struct vnode *a_fvp; 1949 struct componentname *a_fcnp; 1950 struct vnode *a_tdvp; 1951 struct vnode *a_tvp; 1952 struct componentname *a_tcnp; 1953 } */ *ap = v; 1954 struct vnode *tvp = ap->a_tvp; 1955 struct vnode *tdvp = ap->a_tdvp; 1956 struct vnode *fvp = ap->a_fvp; 1957 struct vnode *fdvp = ap->a_fdvp; 1958 struct componentname *tcnp = ap->a_tcnp; 1959 struct componentname *fcnp = ap->a_fcnp; 1960 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1961 struct vattr fvap, tvap; 1962 int error; 1963 1964 DPRINTF(CALL, ("udf_rename called\n")); 1965 1966 /* disallow cross-device renames */ 1967 if (fvp->v_mount != tdvp->v_mount || 1968 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1969 error = EXDEV; 1970 goto out_unlocked; 1971 } 1972 1973 fnode = VTOI(fvp); 1974 fdnode = VTOI(fdvp); 1975 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1976 tdnode = VTOI(tdvp); 1977 1978 /* lock our source dir */ 1979 if (fdnode != tdnode) { 1980 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1981 if (error != 0) 1982 goto out_unlocked; 1983 } 1984 1985 /* get info about the node to be moved */ 1986 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1987 KASSERT(error == 0); 1988 1989 /* check when to delete the old already existing entry */ 1990 if (tvp) { 1991 /* get info about the node to be moved to */ 1992 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1993 KASSERT(error == 0); 1994 1995 /* if both dirs, make sure the destination is empty */ 1996 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1997 if (tvap.va_nlink > 2) { 1998 error = ENOTEMPTY; 1999 goto out; 2000 } 2001 } 2002 /* if moving dir, make sure destination is dir too */ 2003 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2004 error = ENOTDIR; 2005 goto out; 2006 } 2007 /* if we're moving a non-directory, make sure dest is no dir */ 2008 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2009 error = EISDIR; 2010 goto out; 2011 } 2012 } 2013 2014 /* check if moving a directory to a new parent is allowed */ 2015 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2016 /* release tvp since we might encounter it and lock up */ 2017 if (tvp) 2018 vput(tvp); 2019 2020 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2021 vref(tdvp); 2022 2023 /* search if fnode is a component of tdnode's path to root */ 2024 error = udf_on_rootpath(fnode, tdnode); 2025 2026 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2027 2028 if (error) { 2029 /* compensate for our vref earlier */ 2030 vrele(tdvp); 2031 goto out; 2032 } 2033 2034 /* relock tdvp; its still here due to the vref earlier */ 2035 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2036 2037 /* 2038 * re-lookup tvp since the parent has been unlocked, so could 2039 * have changed/removed in the meantime. 2040 */ 2041 tcnp->cn_flags &= ~SAVESTART; 2042 error = relookup(tdvp, &tvp, tcnp); 2043 if (error) { 2044 vput(tdvp); 2045 goto out; 2046 } 2047 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2048 } 2049 2050 /* remove existing entry if present */ 2051 if (tvp) 2052 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2053 2054 /* create new directory entry for the node */ 2055 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2056 if (error) 2057 goto out; 2058 2059 /* unlink old directory entry for the node, if failing, unattach new */ 2060 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2061 if (error) 2062 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2063 if (error) 2064 goto out; 2065 2066 /* update tnode's '..' if moving directory to new parent */ 2067 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2068 /* update fnode's '..' entry */ 2069 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2070 if (error) { 2071 /* 'try' to recover from this situation */ 2072 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2073 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2074 } 2075 } 2076 2077 out: 2078 if (fdnode != tdnode) 2079 VOP_UNLOCK(fdvp, 0); 2080 2081 out_unlocked: 2082 VOP_ABORTOP(tdvp, tcnp); 2083 if (tdvp == tvp) 2084 vrele(tdvp); 2085 else 2086 vput(tdvp); 2087 if (tvp) 2088 vput(tvp); 2089 VOP_ABORTOP(fdvp, fcnp); 2090 2091 /* release source nodes. */ 2092 vrele(fdvp); 2093 vrele(fvp); 2094 2095 return error; 2096 } 2097 2098 /* --------------------------------------------------------------------- */ 2099 2100 int 2101 udf_remove(void *v) 2102 { 2103 struct vop_remove_args /* { 2104 struct vnode *a_dvp; 2105 struct vnode *a_vp; 2106 struct componentname *a_cnp; 2107 } */ *ap = v; 2108 struct vnode *dvp = ap->a_dvp; 2109 struct vnode *vp = ap->a_vp; 2110 struct componentname *cnp = ap->a_cnp; 2111 struct udf_node *dir_node = VTOI(dvp);; 2112 struct udf_node *udf_node = VTOI(vp); 2113 struct udf_mount *ump = dir_node->ump; 2114 int error; 2115 2116 DPRINTF(CALL, ("udf_remove called\n")); 2117 if (vp->v_type != VDIR) { 2118 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2119 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2120 } else { 2121 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2122 error = EPERM; 2123 } 2124 2125 if (error == 0) { 2126 VN_KNOTE(vp, NOTE_DELETE); 2127 VN_KNOTE(dvp, NOTE_WRITE); 2128 } 2129 2130 if (dvp == vp) 2131 vrele(vp); 2132 else 2133 vput(vp); 2134 vput(dvp); 2135 2136 return error; 2137 } 2138 2139 /* --------------------------------------------------------------------- */ 2140 2141 int 2142 udf_rmdir(void *v) 2143 { 2144 struct vop_rmdir_args /* { 2145 struct vnode *a_dvp; 2146 struct vnode *a_vp; 2147 struct componentname *a_cnp; 2148 } */ *ap = v; 2149 struct vnode *vp = ap->a_vp; 2150 struct vnode *dvp = ap->a_dvp; 2151 struct componentname *cnp = ap->a_cnp; 2152 struct udf_node *dir_node = VTOI(dvp);; 2153 struct udf_node *udf_node = VTOI(vp); 2154 struct udf_mount *ump = dir_node->ump; 2155 int refcnt, error; 2156 2157 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2158 2159 /* don't allow '.' to be deleted */ 2160 if (dir_node == udf_node) { 2161 vrele(dvp); 2162 vput(vp); 2163 return EINVAL; 2164 } 2165 2166 /* check to see if the directory is empty */ 2167 error = 0; 2168 if (dir_node->fe) { 2169 refcnt = udf_rw16(udf_node->fe->link_cnt); 2170 } else { 2171 refcnt = udf_rw16(udf_node->efe->link_cnt); 2172 } 2173 if (refcnt > 1) { 2174 /* NOT empty */ 2175 vput(dvp); 2176 vput(vp); 2177 return ENOTEMPTY; 2178 } 2179 2180 /* detach the node from the directory */ 2181 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2182 if (error == 0) { 2183 cache_purge(vp); 2184 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2185 VN_KNOTE(vp, NOTE_DELETE); 2186 } 2187 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2188 2189 /* unput the nodes and exit */ 2190 vput(dvp); 2191 vput(vp); 2192 2193 return error; 2194 } 2195 2196 /* --------------------------------------------------------------------- */ 2197 2198 int 2199 udf_fsync(void *v) 2200 { 2201 struct vop_fsync_args /* { 2202 struct vnode *a_vp; 2203 kauth_cred_t a_cred; 2204 int a_flags; 2205 off_t offlo; 2206 off_t offhi; 2207 struct proc *a_p; 2208 } */ *ap = v; 2209 struct vnode *vp = ap->a_vp; 2210 struct udf_node *udf_node = VTOI(vp); 2211 int error, flags, wait; 2212 2213 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2214 udf_node, 2215 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2216 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2217 2218 /* flush data and wait for it when requested */ 2219 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2220 vflushbuf(vp, wait); 2221 2222 if (udf_node == NULL) { 2223 printf("udf_fsync() called on NULL udf_node!\n"); 2224 return 0; 2225 } 2226 if (vp->v_tag != VT_UDF) { 2227 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2228 return 0; 2229 } 2230 2231 /* set our times */ 2232 udf_itimes(udf_node, NULL, NULL, NULL); 2233 2234 /* if called when mounted readonly, never write back */ 2235 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2236 return 0; 2237 2238 /* if only data is requested, return */ 2239 if (ap->a_flags & FSYNC_DATAONLY) 2240 return 0; 2241 2242 /* check if the node is dirty 'enough'*/ 2243 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2244 if (flags == 0) 2245 return 0; 2246 2247 /* if we don't have to wait, check for IO pending */ 2248 if (!wait) { 2249 if (vp->v_numoutput > 0) { 2250 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2251 return 0; 2252 } 2253 if (udf_node->outstanding_bufs > 0) { 2254 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2255 return 0; 2256 } 2257 if (udf_node->outstanding_nodedscr > 0) { 2258 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2259 return 0; 2260 } 2261 } 2262 2263 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2264 if (wait) { 2265 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2266 mutex_enter(&vp->v_interlock); 2267 while (vp->v_numoutput) { 2268 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2269 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2270 } 2271 mutex_exit(&vp->v_interlock); 2272 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2273 } 2274 2275 /* write out node and wait for it if requested */ 2276 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2277 error = udf_writeout_node(udf_node, wait); 2278 if (error) 2279 return error; 2280 2281 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2282 2283 return 0; 2284 } 2285 2286 /* --------------------------------------------------------------------- */ 2287 2288 int 2289 udf_advlock(void *v) 2290 { 2291 struct vop_advlock_args /* { 2292 struct vnode *a_vp; 2293 void *a_id; 2294 int a_op; 2295 struct flock *a_fl; 2296 int a_flags; 2297 } */ *ap = v; 2298 struct vnode *vp = ap->a_vp; 2299 struct udf_node *udf_node = VTOI(vp); 2300 struct file_entry *fe; 2301 struct extfile_entry *efe; 2302 uint64_t file_size; 2303 2304 DPRINTF(LOCKING, ("udf_advlock called\n")); 2305 2306 /* get directory filesize */ 2307 if (udf_node->fe) { 2308 fe = udf_node->fe; 2309 file_size = udf_rw64(fe->inf_len); 2310 } else { 2311 assert(udf_node->efe); 2312 efe = udf_node->efe; 2313 file_size = udf_rw64(efe->inf_len); 2314 } 2315 2316 return lf_advlock(ap, &udf_node->lockf, file_size); 2317 } 2318 2319 /* --------------------------------------------------------------------- */ 2320 2321 /* Global vfs vnode data structures for udfs */ 2322 int (**udf_vnodeop_p)(void *); 2323 2324 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2325 { &vop_default_desc, vn_default_error }, 2326 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2327 { &vop_create_desc, udf_create }, /* create */ 2328 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2329 { &vop_open_desc, udf_open }, /* open */ 2330 { &vop_close_desc, udf_close }, /* close */ 2331 { &vop_access_desc, udf_access }, /* access */ 2332 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2333 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2334 { &vop_read_desc, udf_read }, /* read */ 2335 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2336 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2337 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2338 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2339 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2340 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2341 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2342 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2343 { &vop_seek_desc, genfs_seek }, /* seek */ 2344 { &vop_remove_desc, udf_remove }, /* remove */ 2345 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2346 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2347 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2348 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2349 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2350 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2351 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2352 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2353 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2354 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2355 { &vop_lock_desc, genfs_lock }, /* lock */ 2356 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2357 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2358 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2359 /* { &vop_print_desc, udf_print }, */ /* print */ 2360 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2361 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2362 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2363 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2364 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2365 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2366 { NULL, NULL } 2367 }; 2368 2369 2370 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2371 &udf_vnodeop_p, udf_vnodeop_entries 2372 }; 2373 2374