udf_vnops.c revision 1.46
1 /* $NetBSD: udf_vnops.c,v 1.46 2009/06/24 17:09:13 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 1.46 2009/06/24 17:09:13 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_calchash(&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, 590 fid, dirent); 591 DPRINTFIF(READDIR, error, ("read error in read fid " 592 "stream : %d\n", error)); 593 if (error) 594 break; 595 596 /* 597 * If there isn't enough space in the uio to return a 598 * whole dirent, break off read 599 */ 600 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 601 break; 602 603 /* remember the last entry we transfered */ 604 transoffset = diroffset; 605 606 /* skip deleted entries */ 607 if (fid->file_char & UDF_FILE_CHAR_DEL) 608 continue; 609 610 /* skip not visible files */ 611 if (fid->file_char & UDF_FILE_CHAR_VIS) 612 continue; 613 614 /* copy dirent to the caller */ 615 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 616 dirent->d_name, dirent->d_type)); 617 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 618 } 619 620 /* pass on last transfered offset */ 621 uio->uio_offset = transoffset; 622 free(fid, M_UDFTEMP); 623 } 624 625 if (ap->a_eofflag) 626 *ap->a_eofflag = (uio->uio_offset >= file_size); 627 628 #ifdef DEBUG 629 if (udf_verbose & UDF_DEBUG_READDIR) { 630 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 631 if (ap->a_eofflag) 632 printf("returning EOF ? %d\n", *ap->a_eofflag); 633 if (error) 634 printf("readdir returning error %d\n", error); 635 } 636 #endif 637 638 free(dirent, M_UDFTEMP); 639 return error; 640 } 641 642 /* --------------------------------------------------------------------- */ 643 644 int 645 udf_lookup(void *v) 646 { 647 struct vop_lookup_args /* { 648 struct vnode *a_dvp; 649 struct vnode **a_vpp; 650 struct componentname *a_cnp; 651 } */ *ap = v; 652 struct vnode *dvp = ap->a_dvp; 653 struct vnode **vpp = ap->a_vpp; 654 struct componentname *cnp = ap->a_cnp; 655 struct udf_node *dir_node, *res_node; 656 struct udf_mount *ump; 657 struct long_ad icb_loc; 658 const char *name; 659 int namelen, nameiop, islastcn, mounted_ro; 660 int vnodetp; 661 int error, found; 662 663 dir_node = VTOI(dvp); 664 ump = dir_node->ump; 665 *vpp = NULL; 666 667 DPRINTF(LOOKUP, ("udf_lookup called\n")); 668 669 /* simplify/clarification flags */ 670 nameiop = cnp->cn_nameiop; 671 islastcn = cnp->cn_flags & ISLASTCN; 672 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 673 674 /* check exec/dirread permissions first */ 675 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 676 if (error) 677 return error; 678 679 DPRINTF(LOOKUP, ("\taccess ok\n")); 680 681 /* 682 * If requesting a modify on the last path element on a read-only 683 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 684 */ 685 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 686 return EROFS; 687 688 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 689 cnp->cn_nameptr)); 690 /* look in the nami cache; returns 0 on success!! */ 691 error = cache_lookup(dvp, vpp, cnp); 692 if (error >= 0) 693 return error; 694 695 DPRINTF(LOOKUP, ("\tNOT found in cache\n")); 696 697 /* 698 * Obviously, the file is not (anymore) in the namecache, we have to 699 * search for it. There are three basic cases: '.', '..' and others. 700 * 701 * Following the guidelines of VOP_LOOKUP manpage and tmpfs. 702 */ 703 error = 0; 704 if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) { 705 DPRINTF(LOOKUP, ("\tlookup '.'\n")); 706 /* special case 1 '.' */ 707 VREF(dvp); 708 *vpp = dvp; 709 /* done */ 710 } else if (cnp->cn_flags & ISDOTDOT) { 711 /* special case 2 '..' */ 712 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 713 714 /* get our node */ 715 name = ".."; 716 namelen = 2; 717 error = udf_lookup_name_in_dir(dvp, name, namelen, 718 &icb_loc, &found); 719 if (error) 720 goto out; 721 if (!found) 722 error = ENOENT; 723 724 /* first unlock parent */ 725 VOP_UNLOCK(dvp, 0); 726 727 if (error == 0) { 728 DPRINTF(LOOKUP, ("\tfound '..'\n")); 729 /* try to create/reuse the node */ 730 error = udf_get_node(ump, &icb_loc, &res_node); 731 732 if (!error) { 733 DPRINTF(LOOKUP, 734 ("\tnode retrieved/created OK\n")); 735 *vpp = res_node->vnode; 736 } 737 } 738 739 /* try to relock parent */ 740 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 741 } else { 742 DPRINTF(LOOKUP, ("\tlookup file\n")); 743 /* all other files */ 744 /* lookup filename in the directory; location icb_loc */ 745 name = cnp->cn_nameptr; 746 namelen = cnp->cn_namelen; 747 error = udf_lookup_name_in_dir(dvp, name, namelen, 748 &icb_loc, &found); 749 if (error) 750 goto out; 751 if (!found) { 752 DPRINTF(LOOKUP, ("\tNOT found\n")); 753 /* 754 * UGH, didn't find name. If we're creating or 755 * renaming on the last name this is OK and we ought 756 * to return EJUSTRETURN if its allowed to be created. 757 */ 758 error = ENOENT; 759 if (islastcn && 760 (nameiop == CREATE || nameiop == RENAME)) 761 error = 0; 762 if (!error) { 763 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 764 if (!error) { 765 /* keep the component name */ 766 cnp->cn_flags |= SAVENAME; 767 error = EJUSTRETURN; 768 } 769 } 770 /* done */ 771 } else { 772 /* try to create/reuse the node */ 773 error = udf_get_node(ump, &icb_loc, &res_node); 774 if (!error) { 775 /* 776 * If we are not at the last path component 777 * and found a non-directory or non-link entry 778 * (which may itself be pointing to a 779 * directory), raise an error. 780 */ 781 vnodetp = res_node->vnode->v_type; 782 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 783 if (!islastcn) 784 error = ENOTDIR; 785 } 786 787 } 788 if (!error) { 789 *vpp = res_node->vnode; 790 } 791 } 792 } 793 794 out: 795 /* 796 * Store result in the cache if requested. If we are creating a file, 797 * the file might not be found and thus putting it into the namecache 798 * might be seen as negative caching. 799 */ 800 if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE) 801 cache_enter(dvp, *vpp, cnp); 802 803 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 804 805 return error; 806 } 807 808 /* --------------------------------------------------------------------- */ 809 810 int 811 udf_getattr(void *v) 812 { 813 struct vop_getattr_args /* { 814 struct vnode *a_vp; 815 struct vattr *a_vap; 816 kauth_cred_t a_cred; 817 struct lwp *a_l; 818 } */ *ap = v; 819 struct vnode *vp = ap->a_vp; 820 struct udf_node *udf_node = VTOI(vp); 821 struct udf_mount *ump = udf_node->ump; 822 struct file_entry *fe = udf_node->fe; 823 struct extfile_entry *efe = udf_node->efe; 824 struct filetimes_extattr_entry *ft_extattr; 825 struct device_extattr_entry *devattr; 826 struct vattr *vap = ap->a_vap; 827 struct timestamp *atime, *mtime, *attrtime, *creatime; 828 uint64_t filesize, blkssize; 829 uint32_t nlink; 830 uint32_t offset, a_l; 831 uint8_t *filedata; 832 uid_t uid; 833 gid_t gid; 834 int error; 835 836 DPRINTF(CALL, ("udf_getattr called\n")); 837 838 /* update times before we returning values */ 839 udf_itimes(udf_node, NULL, NULL, NULL); 840 841 /* get descriptor information */ 842 if (fe) { 843 nlink = udf_rw16(fe->link_cnt); 844 uid = (uid_t)udf_rw32(fe->uid); 845 gid = (gid_t)udf_rw32(fe->gid); 846 filesize = udf_rw64(fe->inf_len); 847 blkssize = udf_rw64(fe->logblks_rec); 848 atime = &fe->atime; 849 mtime = &fe->mtime; 850 attrtime = &fe->attrtime; 851 filedata = fe->data; 852 853 /* initial guess */ 854 creatime = mtime; 855 856 /* check our extended attribute if present */ 857 error = udf_extattr_search_intern(udf_node, 858 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 859 if (!error) { 860 ft_extattr = (struct filetimes_extattr_entry *) 861 (filedata + offset); 862 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 863 creatime = &ft_extattr->times[0]; 864 } 865 } else { 866 assert(udf_node->efe); 867 nlink = udf_rw16(efe->link_cnt); 868 uid = (uid_t)udf_rw32(efe->uid); 869 gid = (gid_t)udf_rw32(efe->gid); 870 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 871 blkssize = udf_rw64(efe->logblks_rec); 872 atime = &efe->atime; 873 mtime = &efe->mtime; 874 attrtime = &efe->attrtime; 875 creatime = &efe->ctime; 876 filedata = efe->data; 877 } 878 879 /* do the uid/gid translation game */ 880 if (uid == (uid_t) -1) 881 uid = ump->mount_args.anon_uid; 882 if (gid == (gid_t) -1) 883 gid = ump->mount_args.anon_gid; 884 885 /* fill in struct vattr with values from the node */ 886 VATTR_NULL(vap); 887 vap->va_type = vp->v_type; 888 vap->va_mode = udf_getaccessmode(udf_node); 889 vap->va_nlink = nlink; 890 vap->va_uid = uid; 891 vap->va_gid = gid; 892 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 893 vap->va_fileid = udf_calchash(&udf_node->loc); /* inode hash XXX */ 894 vap->va_size = filesize; 895 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 896 897 /* 898 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 899 * 1 to the link count if its a directory we're requested attributes 900 * of. 901 */ 902 if (vap->va_type == VDIR) 903 vap->va_nlink++; 904 905 /* access times */ 906 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 907 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 908 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 909 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 910 911 vap->va_gen = 1; /* no multiple generations yes (!?) */ 912 vap->va_flags = 0; /* no flags */ 913 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 914 vap->va_filerev = 1; /* TODO file revision numbers? */ 915 vap->va_vaflags = 0; 916 /* TODO get vaflags from the extended attributes? */ 917 918 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 919 error = udf_extattr_search_intern(udf_node, 920 UDF_DEVICESPEC_ATTR_NO, "", 921 &offset, &a_l); 922 /* if error, deny access */ 923 if (error || (filedata == NULL)) { 924 vap->va_mode = 0; /* or v_type = VNON? */ 925 } else { 926 devattr = (struct device_extattr_entry *) 927 filedata + offset; 928 vap->va_rdev = makedev( 929 udf_rw32(devattr->major), 930 udf_rw32(devattr->minor) 931 ); 932 /* TODO we could check the implementator */ 933 } 934 } 935 936 return 0; 937 } 938 939 /* --------------------------------------------------------------------- */ 940 941 static int 942 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 943 kauth_cred_t cred) 944 { 945 struct udf_node *udf_node = VTOI(vp); 946 uid_t uid; 947 gid_t gid; 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 /* check permissions */ 976 error = genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid); 977 if (error) 978 return (error); 979 980 /* change the ownership */ 981 udf_setownership(udf_node, new_uid, new_gid); 982 983 /* mark node changed */ 984 udf_node->i_flags |= IN_CHANGE; 985 986 return 0; 987 } 988 989 990 static int 991 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 992 { 993 struct udf_node *udf_node = VTOI(vp); 994 uid_t uid; 995 gid_t gid; 996 int error; 997 998 #ifdef notyet 999 /* TODO get vaflags from the extended attributes? */ 1000 /* Immutable or append-only files cannot be modified, either. */ 1001 if (udf_node->flags & (IMMUTABLE | APPEND)) 1002 return EPERM; 1003 #endif 1004 1005 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1006 return EROFS; 1007 1008 /* retrieve uid/gid values */ 1009 udf_getownership(udf_node, &uid, &gid); 1010 1011 /* check permissions */ 1012 error = genfs_can_chmod(vp, cred, uid, gid, mode); 1013 if (error) 1014 return (error); 1015 1016 /* change mode */ 1017 udf_setaccessmode(udf_node, mode); 1018 1019 /* mark node changed */ 1020 udf_node->i_flags |= IN_CHANGE; 1021 1022 return 0; 1023 } 1024 1025 1026 /* exported */ 1027 int 1028 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1029 { 1030 struct udf_node *udf_node = VTOI(vp); 1031 int error, extended; 1032 1033 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1034 return EROFS; 1035 1036 /* Decide whether this is a valid operation based on the file type. */ 1037 switch (vp->v_type) { 1038 case VDIR: 1039 return EISDIR; 1040 case VREG: 1041 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1042 return EROFS; 1043 break; 1044 case VBLK: 1045 /* FALLTHROUGH */ 1046 case VCHR: 1047 /* FALLTHROUGH */ 1048 case VFIFO: 1049 /* Allow modifications of special files even if in the file 1050 * system is mounted read-only (we are not modifying the 1051 * files themselves, but the objects they represent). */ 1052 return 0; 1053 default: 1054 /* Anything else is unsupported. */ 1055 return EOPNOTSUPP; 1056 } 1057 1058 #if notyet 1059 /* TODO get vaflags from the extended attributes? */ 1060 /* Immutable or append-only files cannot be modified, either. */ 1061 if (node->flags & (IMMUTABLE | APPEND)) 1062 return EPERM; 1063 #endif 1064 1065 /* resize file to the requested size */ 1066 error = udf_resize_node(udf_node, newsize, &extended); 1067 1068 if (error == 0) { 1069 /* mark change */ 1070 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1071 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1072 udf_update(vp, NULL, NULL, NULL, 0); 1073 } 1074 1075 return error; 1076 } 1077 1078 1079 static int 1080 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1081 { 1082 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1083 return EROFS; 1084 1085 /* XXX we can't do this yet XXX */ 1086 1087 return EINVAL; 1088 } 1089 1090 1091 static int 1092 udf_chtimes(struct vnode *vp, 1093 struct timespec *atime, struct timespec *mtime, 1094 struct timespec *birthtime, int setattrflags, 1095 kauth_cred_t cred) 1096 { 1097 struct udf_node *udf_node = VTOI(vp); 1098 uid_t uid; 1099 gid_t gid; 1100 int error; 1101 1102 #ifdef notyet 1103 /* TODO get vaflags from the extended attributes? */ 1104 /* Immutable or append-only files cannot be modified, either. */ 1105 if (udf_node->flags & (IMMUTABLE | APPEND)) 1106 return EPERM; 1107 #endif 1108 1109 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1110 return EROFS; 1111 1112 /* retrieve uid/gid values */ 1113 udf_getownership(udf_node, &uid, &gid); 1114 1115 /* check permissions */ 1116 error = genfs_can_chtimes(vp, setattrflags, uid, cred); 1117 if (error) 1118 return (error); 1119 1120 /* update node flags depending on what times are passed */ 1121 if (atime->tv_sec != VNOVAL) 1122 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1123 udf_node->i_flags |= IN_ACCESS; 1124 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) 1125 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1126 1127 return udf_update(vp, atime, mtime, birthtime, 0); 1128 } 1129 1130 1131 int 1132 udf_setattr(void *v) 1133 { 1134 struct vop_setattr_args /* { 1135 struct vnode *a_vp; 1136 struct vattr *a_vap; 1137 kauth_cred_t a_cred; 1138 struct lwp *a_l; 1139 } */ *ap = v; 1140 struct vnode *vp = ap->a_vp; 1141 /* struct udf_node *udf_node = VTOI(vp); */ 1142 /* struct udf_mount *ump = udf_node->ump; */ 1143 kauth_cred_t cred = ap->a_cred; 1144 struct vattr *vap = ap->a_vap; 1145 int error; 1146 1147 DPRINTF(CALL, ("udf_setattr called\n")); 1148 1149 /* Abort if any unsettable attribute is given. */ 1150 error = 0; 1151 if (vap->va_type != VNON || 1152 vap->va_nlink != VNOVAL || 1153 vap->va_fsid != VNOVAL || 1154 vap->va_fileid != VNOVAL || 1155 vap->va_blocksize != VNOVAL || 1156 #ifdef notyet 1157 /* checks are debated */ 1158 vap->va_ctime.tv_sec != VNOVAL || 1159 vap->va_ctime.tv_nsec != VNOVAL || 1160 vap->va_birthtime.tv_sec != VNOVAL || 1161 vap->va_birthtime.tv_nsec != VNOVAL || 1162 #endif 1163 vap->va_gen != VNOVAL || 1164 vap->va_rdev != VNOVAL || 1165 vap->va_bytes != VNOVAL) 1166 error = EINVAL; 1167 1168 DPRINTF(ATTR, ("setattr changing:\n")); 1169 if (error == 0 && (vap->va_flags != VNOVAL)) { 1170 DPRINTF(ATTR, ("\tchflags\n")); 1171 error = udf_chflags(vp, vap->va_flags, cred); 1172 } 1173 1174 if (error == 0 && (vap->va_size != VNOVAL)) { 1175 DPRINTF(ATTR, ("\tchsize\n")); 1176 error = udf_chsize(vp, vap->va_size, cred); 1177 } 1178 1179 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1180 DPRINTF(ATTR, ("\tchown\n")); 1181 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1182 } 1183 1184 if (error == 0 && (vap->va_mode != VNOVAL)) { 1185 DPRINTF(ATTR, ("\tchmod\n")); 1186 error = udf_chmod(vp, vap->va_mode, cred); 1187 } 1188 1189 if (error == 0 && 1190 ((vap->va_atime.tv_sec != VNOVAL && 1191 vap->va_atime.tv_nsec != VNOVAL) || 1192 (vap->va_mtime.tv_sec != VNOVAL && 1193 vap->va_mtime.tv_nsec != VNOVAL)) 1194 ) { 1195 DPRINTF(ATTR, ("\tchtimes\n")); 1196 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1197 &vap->va_birthtime, vap->va_vaflags, cred); 1198 } 1199 VN_KNOTE(vp, NOTE_ATTRIB); 1200 1201 return error; 1202 } 1203 1204 /* --------------------------------------------------------------------- */ 1205 1206 /* 1207 * Return POSIX pathconf information for UDF file systems. 1208 */ 1209 int 1210 udf_pathconf(void *v) 1211 { 1212 struct vop_pathconf_args /* { 1213 struct vnode *a_vp; 1214 int a_name; 1215 register_t *a_retval; 1216 } */ *ap = v; 1217 uint32_t bits; 1218 1219 DPRINTF(CALL, ("udf_pathconf called\n")); 1220 1221 switch (ap->a_name) { 1222 case _PC_LINK_MAX: 1223 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1224 return 0; 1225 case _PC_NAME_MAX: 1226 *ap->a_retval = NAME_MAX; 1227 return 0; 1228 case _PC_PATH_MAX: 1229 *ap->a_retval = PATH_MAX; 1230 return 0; 1231 case _PC_PIPE_BUF: 1232 *ap->a_retval = PIPE_BUF; 1233 return 0; 1234 case _PC_CHOWN_RESTRICTED: 1235 *ap->a_retval = 1; 1236 return 0; 1237 case _PC_NO_TRUNC: 1238 *ap->a_retval = 1; 1239 return 0; 1240 case _PC_SYNC_IO: 1241 *ap->a_retval = 0; /* synchronised is off for performance */ 1242 return 0; 1243 case _PC_FILESIZEBITS: 1244 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1245 bits = 64; /* XXX ought to deliver 65 */ 1246 #if 0 1247 if (udf_node) 1248 bits = 64 * vp->v_mount->mnt_dev_bshift; 1249 #endif 1250 *ap->a_retval = bits; 1251 return 0; 1252 } 1253 1254 return EINVAL; 1255 } 1256 1257 1258 /* --------------------------------------------------------------------- */ 1259 1260 int 1261 udf_open(void *v) 1262 { 1263 struct vop_open_args /* { 1264 struct vnode *a_vp; 1265 int a_mode; 1266 kauth_cred_t a_cred; 1267 struct proc *a_p; 1268 } */ *ap = v; 1269 int flags; 1270 1271 DPRINTF(CALL, ("udf_open called\n")); 1272 1273 /* 1274 * Files marked append-only must be opened for appending. 1275 * TODO: get chflags(2) flags from extened attribute. 1276 */ 1277 flags = 0; 1278 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1279 return (EPERM); 1280 1281 return 0; 1282 } 1283 1284 1285 /* --------------------------------------------------------------------- */ 1286 1287 int 1288 udf_close(void *v) 1289 { 1290 struct vop_close_args /* { 1291 struct vnode *a_vp; 1292 int a_fflag; 1293 kauth_cred_t a_cred; 1294 struct proc *a_p; 1295 } */ *ap = v; 1296 struct vnode *vp = ap->a_vp; 1297 struct udf_node *udf_node = VTOI(vp); 1298 1299 DPRINTF(CALL, ("udf_close called\n")); 1300 udf_node = udf_node; /* shut up gcc */ 1301 1302 mutex_enter(&vp->v_interlock); 1303 if (vp->v_usecount > 1) 1304 udf_itimes(udf_node, NULL, NULL, NULL); 1305 mutex_exit(&vp->v_interlock); 1306 1307 return 0; 1308 } 1309 1310 1311 /* --------------------------------------------------------------------- */ 1312 1313 int 1314 udf_access(void *v) 1315 { 1316 struct vop_access_args /* { 1317 struct vnode *a_vp; 1318 int a_mode; 1319 kauth_cred_t a_cred; 1320 struct proc *a_p; 1321 } */ *ap = v; 1322 struct vnode *vp = ap->a_vp; 1323 mode_t mode = ap->a_mode; 1324 kauth_cred_t cred = ap->a_cred; 1325 /* struct udf_node *udf_node = VTOI(vp); */ 1326 struct vattr vap; 1327 int flags; 1328 int error; 1329 1330 DPRINTF(CALL, ("udf_access called\n")); 1331 1332 error = VOP_GETATTR(vp, &vap, NULL); 1333 if (error) 1334 return error; 1335 1336 /* check if we are allowed to write */ 1337 switch (vap.va_type) { 1338 case VDIR: 1339 case VLNK: 1340 case VREG: 1341 /* 1342 * normal nodes: check if we're on a read-only mounted 1343 * filingsystem and bomb out if we're trying to write. 1344 */ 1345 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1346 return EROFS; 1347 break; 1348 case VBLK: 1349 case VCHR: 1350 case VSOCK: 1351 case VFIFO: 1352 /* 1353 * special nodes: even on read-only mounted filingsystems 1354 * these are allowed to be written to if permissions allow. 1355 */ 1356 break; 1357 default: 1358 /* no idea what this is */ 1359 return EINVAL; 1360 } 1361 1362 /* noone may write immutable files */ 1363 /* TODO: get chflags(2) flags from extened attribute. */ 1364 flags = 0; 1365 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1366 return EPERM; 1367 1368 /* ask the generic genfs_can_access to advice on security */ 1369 return genfs_can_access(vp->v_type, 1370 vap.va_mode, vap.va_uid, vap.va_gid, 1371 mode, cred); 1372 } 1373 1374 /* --------------------------------------------------------------------- */ 1375 1376 int 1377 udf_create(void *v) 1378 { 1379 struct vop_create_args /* { 1380 struct vnode *a_dvp; 1381 struct vnode **a_vpp; 1382 struct componentname *a_cnp; 1383 struct vattr *a_vap; 1384 } */ *ap = v; 1385 struct vnode *dvp = ap->a_dvp; 1386 struct vnode **vpp = ap->a_vpp; 1387 struct vattr *vap = ap->a_vap; 1388 struct componentname *cnp = ap->a_cnp; 1389 int error; 1390 1391 DPRINTF(CALL, ("udf_create called\n")); 1392 error = udf_create_node(dvp, vpp, vap, cnp); 1393 1394 if (error || !(cnp->cn_flags & SAVESTART)) 1395 PNBUF_PUT(cnp->cn_pnbuf); 1396 vput(dvp); 1397 return error; 1398 } 1399 1400 /* --------------------------------------------------------------------- */ 1401 1402 int 1403 udf_mknod(void *v) 1404 { 1405 struct vop_mknod_args /* { 1406 struct vnode *a_dvp; 1407 struct vnode **a_vpp; 1408 struct componentname *a_cnp; 1409 struct vattr *a_vap; 1410 } */ *ap = v; 1411 struct vnode *dvp = ap->a_dvp; 1412 struct vnode **vpp = ap->a_vpp; 1413 struct vattr *vap = ap->a_vap; 1414 struct componentname *cnp = ap->a_cnp; 1415 int error; 1416 1417 DPRINTF(CALL, ("udf_mknod called\n")); 1418 error = udf_create_node(dvp, vpp, vap, cnp); 1419 1420 if (error || !(cnp->cn_flags & SAVESTART)) 1421 PNBUF_PUT(cnp->cn_pnbuf); 1422 vput(dvp); 1423 return error; 1424 } 1425 1426 /* --------------------------------------------------------------------- */ 1427 1428 int 1429 udf_mkdir(void *v) 1430 { 1431 struct vop_mkdir_args /* { 1432 struct vnode *a_dvp; 1433 struct vnode **a_vpp; 1434 struct componentname *a_cnp; 1435 struct vattr *a_vap; 1436 } */ *ap = v; 1437 struct vnode *dvp = ap->a_dvp; 1438 struct vnode **vpp = ap->a_vpp; 1439 struct vattr *vap = ap->a_vap; 1440 struct componentname *cnp = ap->a_cnp; 1441 int error; 1442 1443 DPRINTF(CALL, ("udf_mkdir called\n")); 1444 error = udf_create_node(dvp, vpp, vap, cnp); 1445 1446 if (error || !(cnp->cn_flags & SAVESTART)) 1447 PNBUF_PUT(cnp->cn_pnbuf); 1448 vput(dvp); 1449 return error; 1450 } 1451 1452 /* --------------------------------------------------------------------- */ 1453 1454 static int 1455 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1456 { 1457 struct udf_node *udf_node, *dir_node; 1458 struct vattr vap; 1459 int error; 1460 1461 DPRINTF(CALL, ("udf_link called\n")); 1462 error = 0; 1463 1464 /* some quick checks */ 1465 if (vp->v_type == VDIR) 1466 return EPERM; /* can't link a directory */ 1467 if (dvp->v_mount != vp->v_mount) 1468 return EXDEV; /* can't link across devices */ 1469 if (dvp == vp) 1470 return EPERM; /* can't be the same */ 1471 1472 /* lock node */ 1473 error = vn_lock(vp, LK_EXCLUSIVE); 1474 if (error) 1475 return error; 1476 1477 /* get attributes */ 1478 dir_node = VTOI(dvp); 1479 udf_node = VTOI(vp); 1480 1481 error = VOP_GETATTR(vp, &vap, FSCRED); 1482 if (error) 1483 return error; 1484 1485 /* check link count overflow */ 1486 if (vap.va_nlink >= (1<<16)-1) /* uint16_t */ 1487 return EMLINK; 1488 1489 return udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1490 } 1491 1492 int 1493 udf_link(void *v) 1494 { 1495 struct vop_link_args /* { 1496 struct vnode *a_dvp; 1497 struct vnode *a_vp; 1498 struct componentname *a_cnp; 1499 } */ *ap = v; 1500 struct vnode *dvp = ap->a_dvp; 1501 struct vnode *vp = ap->a_vp; 1502 struct componentname *cnp = ap->a_cnp; 1503 int error; 1504 1505 error = udf_do_link(dvp, vp, cnp); 1506 if (error) 1507 VOP_ABORTOP(dvp, cnp); 1508 1509 if ((vp != dvp) && (VOP_ISLOCKED(vp) == LK_EXCLUSIVE)) 1510 VOP_UNLOCK(vp, 0); 1511 1512 VN_KNOTE(vp, NOTE_LINK); 1513 VN_KNOTE(dvp, NOTE_WRITE); 1514 vput(dvp); 1515 1516 return error; 1517 } 1518 1519 /* --------------------------------------------------------------------- */ 1520 1521 static int 1522 udf_do_symlink(struct udf_node *udf_node, char *target) 1523 { 1524 struct pathcomp pathcomp; 1525 uint8_t *pathbuf, *pathpos, *compnamepos; 1526 char *mntonname; 1527 int pathlen, len, compnamelen, mntonnamelen; 1528 int error; 1529 1530 /* process `target' to an UDF structure */ 1531 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1532 pathpos = pathbuf; 1533 pathlen = 0; 1534 1535 if (*target == '/') { 1536 /* symlink starts from the root */ 1537 len = UDF_PATH_COMP_SIZE; 1538 memset(&pathcomp, 0, len); 1539 pathcomp.type = UDF_PATH_COMP_ROOT; 1540 1541 /* check if its mount-point relative! */ 1542 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1543 mntonnamelen = strlen(mntonname); 1544 if (strlen(target) >= mntonnamelen) { 1545 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1546 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1547 target += mntonnamelen; 1548 } 1549 } else { 1550 target++; 1551 } 1552 1553 memcpy(pathpos, &pathcomp, len); 1554 pathpos += len; 1555 pathlen += len; 1556 } 1557 1558 error = 0; 1559 while (*target) { 1560 /* ignore multiple '/' */ 1561 while (*target == '/') { 1562 target++; 1563 } 1564 if (!*target) 1565 break; 1566 1567 /* extract component name */ 1568 compnamelen = 0; 1569 compnamepos = target; 1570 while ((*target) && (*target != '/')) { 1571 target++; 1572 compnamelen++; 1573 } 1574 1575 /* just trunc if too long ?? (security issue) */ 1576 if (compnamelen >= 127) { 1577 error = ENAMETOOLONG; 1578 break; 1579 } 1580 1581 /* convert unix name to UDF name */ 1582 len = sizeof(struct pathcomp); 1583 memset(&pathcomp, 0, len); 1584 pathcomp.type = UDF_PATH_COMP_NAME; 1585 len = UDF_PATH_COMP_SIZE; 1586 1587 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1588 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1589 if ((compnamelen == 1) && (*compnamepos == '.')) 1590 pathcomp.type = UDF_PATH_COMP_CURDIR; 1591 1592 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1593 unix_to_udf_name( 1594 (char *) &pathcomp.ident, &pathcomp.l_ci, 1595 compnamepos, compnamelen, 1596 &udf_node->ump->logical_vol->desc_charset); 1597 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1598 } 1599 1600 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1601 error = ENAMETOOLONG; 1602 break; 1603 } 1604 1605 memcpy(pathpos, &pathcomp, len); 1606 pathpos += len; 1607 pathlen += len; 1608 } 1609 1610 if (error) { 1611 /* aparently too big */ 1612 free(pathbuf, M_UDFTEMP); 1613 return error; 1614 } 1615 1616 error = udf_grow_node(udf_node, pathlen); 1617 if (error) { 1618 /* failed to pregrow node */ 1619 free(pathbuf, M_UDFTEMP); 1620 return error; 1621 } 1622 1623 /* write out structure on the new file */ 1624 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1625 pathbuf, pathlen, 0, 1626 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1627 FSCRED, NULL, NULL); 1628 1629 /* return status of symlink contents writeout */ 1630 free(pathbuf, M_UDFTEMP); 1631 return error; 1632 } 1633 1634 1635 int 1636 udf_symlink(void *v) 1637 { 1638 struct vop_symlink_args /* { 1639 struct vnode *a_dvp; 1640 struct vnode **a_vpp; 1641 struct componentname *a_cnp; 1642 struct vattr *a_vap; 1643 char *a_target; 1644 } */ *ap = v; 1645 struct vnode *dvp = ap->a_dvp; 1646 struct vnode **vpp = ap->a_vpp; 1647 struct vattr *vap = ap->a_vap; 1648 struct componentname *cnp = ap->a_cnp; 1649 struct udf_node *dir_node; 1650 struct udf_node *udf_node; 1651 int error; 1652 1653 DPRINTF(CALL, ("udf_symlink called\n")); 1654 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1655 error = udf_create_node(dvp, vpp, vap, cnp); 1656 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1657 if (!error) { 1658 dir_node = VTOI(dvp); 1659 udf_node = VTOI(*vpp); 1660 KASSERT(udf_node); 1661 error = udf_do_symlink(udf_node, ap->a_target); 1662 if (error) { 1663 /* remove node */ 1664 udf_shrink_node(udf_node, 0); 1665 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1666 } 1667 } 1668 if (error || !(cnp->cn_flags & SAVESTART)) 1669 PNBUF_PUT(cnp->cn_pnbuf); 1670 vput(dvp); 1671 return error; 1672 } 1673 1674 /* --------------------------------------------------------------------- */ 1675 1676 int 1677 udf_readlink(void *v) 1678 { 1679 struct vop_readlink_args /* { 1680 struct vnode *a_vp; 1681 struct uio *a_uio; 1682 kauth_cred_t a_cred; 1683 } */ *ap = v; 1684 struct vnode *vp = ap->a_vp; 1685 struct uio *uio = ap->a_uio; 1686 kauth_cred_t cred = ap->a_cred; 1687 struct udf_node *udf_node; 1688 struct pathcomp pathcomp; 1689 struct vattr vattr; 1690 uint8_t *pathbuf, *targetbuf, *tmpname; 1691 uint8_t *pathpos, *targetpos; 1692 char *mntonname; 1693 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1694 int first, error; 1695 1696 DPRINTF(CALL, ("udf_readlink called\n")); 1697 1698 udf_node = VTOI(vp); 1699 error = VOP_GETATTR(vp, &vattr, cred); 1700 if (error) 1701 return error; 1702 1703 /* claim temporary buffers for translation */ 1704 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1705 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1706 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1707 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1708 memset(targetbuf, 0, PATH_MAX); 1709 1710 /* read contents of file in our temporary buffer */ 1711 error = vn_rdwr(UIO_READ, udf_node->vnode, 1712 pathbuf, vattr.va_size, 0, 1713 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1714 FSCRED, NULL, NULL); 1715 if (error) { 1716 /* failed to read in symlink contents */ 1717 free(pathbuf, M_UDFTEMP); 1718 free(targetbuf, M_UDFTEMP); 1719 free(tmpname, M_UDFTEMP); 1720 return error; 1721 } 1722 1723 /* convert to a unix path */ 1724 pathpos = pathbuf; 1725 pathlen = 0; 1726 targetpos = targetbuf; 1727 targetlen = PATH_MAX; 1728 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1729 mntonnamelen = strlen(mntonname); 1730 1731 error = 0; 1732 first = 1; 1733 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1734 len = UDF_PATH_COMP_SIZE; 1735 memcpy(&pathcomp, pathpos, len); 1736 l_ci = pathcomp.l_ci; 1737 switch (pathcomp.type) { 1738 case UDF_PATH_COMP_ROOT : 1739 /* XXX should check for l_ci; bugcompatible now */ 1740 if ((targetlen < 1) || !first) { 1741 error = EINVAL; 1742 break; 1743 } 1744 *targetpos++ = '/'; targetlen--; 1745 break; 1746 case UDF_PATH_COMP_MOUNTROOT : 1747 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1748 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1749 error = EINVAL; 1750 break; 1751 } 1752 memcpy(targetpos, mntonname, mntonnamelen); 1753 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1754 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1755 /* more follows, so must be directory */ 1756 *targetpos++ = '/'; targetlen--; 1757 } 1758 break; 1759 case UDF_PATH_COMP_PARENTDIR : 1760 /* XXX should check for l_ci; bugcompatible now */ 1761 if (targetlen < 3) { 1762 error = EINVAL; 1763 break; 1764 } 1765 *targetpos++ = '.'; targetlen--; 1766 *targetpos++ = '.'; targetlen--; 1767 *targetpos++ = '/'; targetlen--; 1768 break; 1769 case UDF_PATH_COMP_CURDIR : 1770 /* XXX should check for l_ci; bugcompatible now */ 1771 if (targetlen < 2) { 1772 error = EINVAL; 1773 break; 1774 } 1775 *targetpos++ = '.'; targetlen--; 1776 *targetpos++ = '/'; targetlen--; 1777 break; 1778 case UDF_PATH_COMP_NAME : 1779 if (l_ci == 0) { 1780 error = EINVAL; 1781 break; 1782 } 1783 memset(tmpname, 0, PATH_MAX); 1784 memcpy(&pathcomp, pathpos, len + l_ci); 1785 udf_to_unix_name(tmpname, MAXPATHLEN, 1786 pathcomp.ident, l_ci, 1787 &udf_node->ump->logical_vol->desc_charset); 1788 namelen = strlen(tmpname); 1789 if (targetlen < namelen + 1) { 1790 error = EINVAL; 1791 break; 1792 } 1793 memcpy(targetpos, tmpname, namelen); 1794 targetpos += namelen; targetlen -= namelen; 1795 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1796 /* more follows, so must be directory */ 1797 *targetpos++ = '/'; targetlen--; 1798 } 1799 break; 1800 default : 1801 error = EINVAL; 1802 break; 1803 } 1804 first = 0; 1805 if (error) 1806 break; 1807 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1808 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1809 1810 } 1811 /* all processed? */ 1812 if (vattr.va_size - pathlen > 0) 1813 error = EINVAL; 1814 1815 /* uiomove() to destination */ 1816 if (!error) 1817 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1818 1819 free(pathbuf, M_UDFTEMP); 1820 free(targetbuf, M_UDFTEMP); 1821 free(tmpname, M_UDFTEMP); 1822 1823 return error; 1824 } 1825 1826 /* --------------------------------------------------------------------- */ 1827 1828 static int 1829 udf_on_rootpath(struct udf_node *fnode, struct udf_node *tdnode) 1830 { 1831 struct udf_mount *ump = tdnode->ump; 1832 struct udf_node *res_node; 1833 struct long_ad icb_loc; 1834 const char *name; 1835 int namelen; 1836 int error, found; 1837 1838 /* if fnode is on the path from tdnode to the root, return error */ 1839 name = ".."; 1840 namelen = 2; 1841 while (fnode != tdnode) { 1842 DPRINTF(NODE, ("udf_on_rootpath : fnode %p, tdnode %p\n", 1843 fnode, tdnode)); 1844 if (tdnode->vnode->v_vflag & VV_ROOT) { 1845 /* found root, accept */ 1846 /* DPRINTF(NODE, ("\tCOUGHT, pre-vput\n")); */ 1847 vput(tdnode->vnode); 1848 DPRINTF(NODE, ("\tCOUGHT: valid\n")); 1849 return 0; 1850 } 1851 /* go down one level */ 1852 error = udf_lookup_name_in_dir(tdnode->vnode, name, namelen, 1853 &icb_loc, &found); 1854 1855 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1856 "found %d\n", error, found)); 1857 /* DPRINTF(NODE, ("\tvput %p\n", tdnode->vnode)); */ 1858 vput(tdnode->vnode); 1859 1860 if (error) /* now what? bail out */ 1861 return EINVAL; 1862 if (!found) /* unlikely */ 1863 return EINVAL; 1864 1865 DPRINTF(NODE, ("\tgetting .. node\n")); 1866 error = udf_get_node(ump, &icb_loc, &res_node); 1867 DPRINTF(NODE, ("\treported error %d\n", error)); 1868 if (error) /* argh, bail out */ 1869 return EINVAL; 1870 1871 tdnode = res_node; 1872 } 1873 DPRINTF(NODE, ("\tCOUGHT: invalid\n")); 1874 vput(tdnode->vnode); 1875 1876 return EINVAL; 1877 } 1878 1879 /* note: i tried to follow the logics of the tmpfs rename code */ 1880 int 1881 udf_rename(void *v) 1882 { 1883 struct vop_rename_args /* { 1884 struct vnode *a_fdvp; 1885 struct vnode *a_fvp; 1886 struct componentname *a_fcnp; 1887 struct vnode *a_tdvp; 1888 struct vnode *a_tvp; 1889 struct componentname *a_tcnp; 1890 } */ *ap = v; 1891 struct vnode *tvp = ap->a_tvp; 1892 struct vnode *tdvp = ap->a_tdvp; 1893 struct vnode *fvp = ap->a_fvp; 1894 struct vnode *fdvp = ap->a_fdvp; 1895 struct componentname *tcnp = ap->a_tcnp; 1896 struct componentname *fcnp = ap->a_fcnp; 1897 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1898 struct vattr fvap, tvap; 1899 int error; 1900 1901 DPRINTF(CALL, ("udf_rename called\n")); 1902 1903 /* disallow cross-device renames */ 1904 if (fvp->v_mount != tdvp->v_mount || 1905 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1906 error = EXDEV; 1907 goto out_unlocked; 1908 } 1909 1910 fnode = VTOI(fvp); 1911 fdnode = VTOI(fdvp); 1912 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1913 tdnode = VTOI(tdvp); 1914 1915 /* lock our source dir */ 1916 if (fdnode != tdnode) { 1917 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1918 if (error != 0) 1919 goto out_unlocked; 1920 } 1921 1922 /* get info about the node to be moved */ 1923 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1924 KASSERT(error == 0); 1925 1926 /* check when to delete the old already existing entry */ 1927 if (tvp) { 1928 /* get info about the node to be moved to */ 1929 error = VOP_GETATTR(fvp, &tvap, FSCRED); 1930 KASSERT(error == 0); 1931 1932 /* if both dirs, make sure the destination is empty */ 1933 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 1934 if (tvap.va_nlink > 2) { 1935 error = ENOTEMPTY; 1936 goto out; 1937 } 1938 } 1939 /* if moving dir, make sure destination is dir too */ 1940 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1941 error = ENOTDIR; 1942 goto out; 1943 } 1944 /* if we're moving a non-directory, make sure dest is no dir */ 1945 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1946 error = EISDIR; 1947 goto out; 1948 } 1949 } 1950 1951 /* check if moving a directory to a new parent is allowed */ 1952 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 1953 vref(tdvp); 1954 error = udf_on_rootpath(fnode, tdnode); 1955 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 1956 1957 /* tdnode is vput()'ed, relock */ 1958 (void) vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 1959 1960 if (error) 1961 goto out; 1962 } 1963 1964 /* remove existing entry if present */ 1965 if (tvp) 1966 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 1967 1968 /* create new directory entry for the node */ 1969 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 1970 if (error) 1971 goto out; 1972 1973 /* unlink old directory entry for the node, if failing, unattach new */ 1974 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 1975 if (error) 1976 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1977 if (error) 1978 goto out; 1979 1980 /* update tnode's '..' if moving directory to new parent */ 1981 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 1982 /* update fnode's '..' entry */ 1983 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 1984 if (error) { 1985 /* 'try' to recover from this situation */ 1986 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 1987 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 1988 } 1989 } 1990 1991 out: 1992 if (fdnode != tdnode) 1993 VOP_UNLOCK(fdvp, 0); 1994 1995 out_unlocked: 1996 VOP_ABORTOP(tdvp, tcnp); 1997 if (tdvp == tvp) 1998 vrele(tdvp); 1999 else 2000 vput(tdvp); 2001 if (tvp) 2002 vput(tvp); 2003 VOP_ABORTOP(fdvp, fcnp); 2004 2005 /* release source nodes. */ 2006 vrele(fdvp); 2007 vrele(fvp); 2008 2009 return error; 2010 } 2011 2012 /* --------------------------------------------------------------------- */ 2013 2014 int 2015 udf_remove(void *v) 2016 { 2017 struct vop_remove_args /* { 2018 struct vnode *a_dvp; 2019 struct vnode *a_vp; 2020 struct componentname *a_cnp; 2021 } */ *ap = v; 2022 struct vnode *dvp = ap->a_dvp; 2023 struct vnode *vp = ap->a_vp; 2024 struct componentname *cnp = ap->a_cnp; 2025 struct udf_node *dir_node = VTOI(dvp);; 2026 struct udf_node *udf_node = VTOI(vp); 2027 struct udf_mount *ump = dir_node->ump; 2028 int error; 2029 2030 DPRINTF(CALL, ("udf_remove called\n")); 2031 if (vp->v_type != VDIR) { 2032 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2033 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2034 } else { 2035 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2036 error = EPERM; 2037 } 2038 2039 if (error == 0) { 2040 VN_KNOTE(vp, NOTE_DELETE); 2041 VN_KNOTE(dvp, NOTE_WRITE); 2042 } 2043 2044 if (dvp == vp) 2045 vrele(vp); 2046 else 2047 vput(vp); 2048 vput(dvp); 2049 2050 return error; 2051 } 2052 2053 /* --------------------------------------------------------------------- */ 2054 2055 int 2056 udf_rmdir(void *v) 2057 { 2058 struct vop_rmdir_args /* { 2059 struct vnode *a_dvp; 2060 struct vnode *a_vp; 2061 struct componentname *a_cnp; 2062 } */ *ap = v; 2063 struct vnode *vp = ap->a_vp; 2064 struct vnode *dvp = ap->a_dvp; 2065 struct componentname *cnp = ap->a_cnp; 2066 struct udf_node *dir_node = VTOI(dvp);; 2067 struct udf_node *udf_node = VTOI(vp); 2068 struct udf_mount *ump = dir_node->ump; 2069 int refcnt, error; 2070 2071 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2072 2073 /* don't allow '.' to be deleted */ 2074 if (dir_node == udf_node) { 2075 vrele(dvp); 2076 vput(vp); 2077 return EINVAL; 2078 } 2079 2080 /* check to see if the directory is empty */ 2081 error = 0; 2082 if (dir_node->fe) { 2083 refcnt = udf_rw16(udf_node->fe->link_cnt); 2084 } else { 2085 refcnt = udf_rw16(udf_node->efe->link_cnt); 2086 } 2087 if (refcnt > 1) { 2088 /* NOT empty */ 2089 vput(dvp); 2090 vput(vp); 2091 return ENOTEMPTY; 2092 } 2093 2094 /* detach the node from the directory */ 2095 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2096 if (error == 0) { 2097 cache_purge(vp); 2098 // cache_purge(dvp); /* XXX from msdosfs, why? */ 2099 VN_KNOTE(vp, NOTE_DELETE); 2100 } 2101 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2102 2103 /* unput the nodes and exit */ 2104 vput(dvp); 2105 vput(vp); 2106 2107 return error; 2108 } 2109 2110 /* --------------------------------------------------------------------- */ 2111 2112 int 2113 udf_fsync(void *v) 2114 { 2115 struct vop_fsync_args /* { 2116 struct vnode *a_vp; 2117 kauth_cred_t a_cred; 2118 int a_flags; 2119 off_t offlo; 2120 off_t offhi; 2121 struct proc *a_p; 2122 } */ *ap = v; 2123 struct vnode *vp = ap->a_vp; 2124 struct udf_node *udf_node = VTOI(vp); 2125 int error, flags, wait; 2126 2127 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2128 udf_node, 2129 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2130 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2131 2132 /* flush data and wait for it when requested */ 2133 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2134 vflushbuf(vp, wait); 2135 2136 if (udf_node == NULL) { 2137 printf("udf_fsync() called on NULL udf_node!\n"); 2138 return 0; 2139 } 2140 if (vp->v_tag != VT_UDF) { 2141 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2142 return 0; 2143 } 2144 2145 /* set our times */ 2146 udf_itimes(udf_node, NULL, NULL, NULL); 2147 2148 /* if called when mounted readonly, never write back */ 2149 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2150 return 0; 2151 2152 /* if only data is requested, return */ 2153 if (ap->a_flags & FSYNC_DATAONLY) 2154 return 0; 2155 2156 /* check if the node is dirty 'enough'*/ 2157 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2158 if (flags == 0) 2159 return 0; 2160 2161 /* if we don't have to wait, check for IO pending */ 2162 if (!wait) { 2163 if (vp->v_numoutput > 0) { 2164 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2165 return 0; 2166 } 2167 if (udf_node->outstanding_bufs > 0) { 2168 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2169 return 0; 2170 } 2171 if (udf_node->outstanding_nodedscr > 0) { 2172 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2173 return 0; 2174 } 2175 } 2176 2177 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2178 if (wait) { 2179 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2180 mutex_enter(&vp->v_interlock); 2181 while (vp->v_numoutput) { 2182 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2183 cv_timedwait(&vp->v_cv, &vp->v_interlock, hz/8); 2184 } 2185 mutex_exit(&vp->v_interlock); 2186 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2187 } 2188 2189 /* write out node and wait for it if requested */ 2190 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2191 error = udf_writeout_node(udf_node, wait); 2192 if (error) 2193 return error; 2194 2195 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2196 2197 return 0; 2198 } 2199 2200 /* --------------------------------------------------------------------- */ 2201 2202 int 2203 udf_advlock(void *v) 2204 { 2205 struct vop_advlock_args /* { 2206 struct vnode *a_vp; 2207 void *a_id; 2208 int a_op; 2209 struct flock *a_fl; 2210 int a_flags; 2211 } */ *ap = v; 2212 struct vnode *vp = ap->a_vp; 2213 struct udf_node *udf_node = VTOI(vp); 2214 struct file_entry *fe; 2215 struct extfile_entry *efe; 2216 uint64_t file_size; 2217 2218 DPRINTF(LOCKING, ("udf_advlock called\n")); 2219 2220 /* get directory filesize */ 2221 if (udf_node->fe) { 2222 fe = udf_node->fe; 2223 file_size = udf_rw64(fe->inf_len); 2224 } else { 2225 assert(udf_node->efe); 2226 efe = udf_node->efe; 2227 file_size = udf_rw64(efe->inf_len); 2228 } 2229 2230 return lf_advlock(ap, &udf_node->lockf, file_size); 2231 } 2232 2233 /* --------------------------------------------------------------------- */ 2234 2235 /* Global vfs vnode data structures for udfs */ 2236 int (**udf_vnodeop_p)(void *); 2237 2238 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2239 { &vop_default_desc, vn_default_error }, 2240 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2241 { &vop_create_desc, udf_create }, /* create */ 2242 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2243 { &vop_open_desc, udf_open }, /* open */ 2244 { &vop_close_desc, udf_close }, /* close */ 2245 { &vop_access_desc, udf_access }, /* access */ 2246 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2247 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2248 { &vop_read_desc, udf_read }, /* read */ 2249 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2250 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2251 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2252 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2253 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2254 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2255 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2256 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2257 { &vop_seek_desc, genfs_seek }, /* seek */ 2258 { &vop_remove_desc, udf_remove }, /* remove */ 2259 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2260 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2261 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2262 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2263 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2264 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2265 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2266 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2267 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2268 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2269 { &vop_lock_desc, genfs_lock }, /* lock */ 2270 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2271 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2272 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2273 /* { &vop_print_desc, udf_print }, */ /* print */ 2274 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2275 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2276 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2277 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2278 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2279 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2280 { NULL, NULL } 2281 }; 2282 2283 2284 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2285 &udf_vnodeop_p, udf_vnodeop_entries 2286 }; 2287 2288
Indexes created Wed Sep 24 05:09:52 GMT 2025