1/* $NetBSD$ */ 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, "$NetBSD$"); 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 */ 70extern int prtactive; 71 72/* implementations of vnode functions; table follows at end */ 73/* --------------------------------------------------------------------- */ 74 75int 76udf_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); 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 /* system nodes are not writen out on inactive, so flush */ 109 udf_node->i_flags = 0; 110 } 111 112 *ap->a_recycle = false; 113 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 114 /* remove this file's allocation */ 115 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 116 *ap->a_recycle = true; 117 udf_delete_node(udf_node); 118 VOP_UNLOCK(vp); 119 vrecycle(vp, NULL, curlwp); 120 return 0; 121 } 122 123 /* write out its node */ 124 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 125 udf_update(vp, NULL, NULL, NULL, 0); 126 VOP_UNLOCK(vp); 127 128 return 0; 129} 130 131/* --------------------------------------------------------------------- */ 132 133int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 134 135int 136udf_reclaim(void *v) 137{ 138 struct vop_reclaim_args /* { 139 struct vnode *a_vp; 140 } */ *ap = v; 141 struct vnode *vp = ap->a_vp; 142 struct udf_node *udf_node = VTOI(vp); 143 144 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 145 if (prtactive && vp->v_usecount > 1) 146 vprint("udf_reclaim(): pushing active", vp); 147 148 if (udf_node == NULL) { 149 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 150 return 0; 151 } 152 153 /* update note for closure */ 154 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 155 156 /* async check to see if all node descriptors are written out */ 157 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 158 vprint("udf_reclaim(): waiting for writeout\n", vp); 159 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 160 } 161 162 /* dispose all node knowledge */ 163 udf_dispose_node(udf_node); 164 165 return 0; 166} 167 168/* --------------------------------------------------------------------- */ 169 170int 171udf_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 259int 260udf_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 * Directories are excluded since its file data that we want 365 * to purge. 366 */ 367 if (!async && (vp->v_type != VDIR) && 368 (old_offset >> 16 != uio->uio_offset >> 16)) { 369 mutex_enter(vp->v_interlock); 370 error = VOP_PUTPAGES(vp, (old_offset >> 16) << 16, 371 (uio->uio_offset >> 16) << 16, 372 PGO_CLEANIT | PGO_LAZY); 373 old_offset = uio->uio_offset; 374 } 375 } 376 uvm_vnp_setsize(vp, file_size); 377 378 /* mark node changed and request update */ 379 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 380 if (vp->v_mount->mnt_flag & MNT_RELATIME) 381 udf_node->i_flags |= IN_ACCESS; 382 383 /* 384 * XXX TODO FFS has code here to reset setuid & setgid when we're not 385 * the superuser as a precaution against tampering. 386 */ 387 388 /* if we wrote a thing, note write action on vnode */ 389 if (resid > uio->uio_resid) 390 VN_KNOTE(vp, NOTE_WRITE | (extended ? NOTE_EXTEND : 0)); 391 392 if (error) { 393 /* bring back file size to its former size */ 394 /* take notice of its errors? */ 395 (void) udf_chsize(vp, (u_quad_t) old_size, cred); 396 397 /* roll back uio */ 398 uio->uio_offset -= resid - uio->uio_resid; 399 uio->uio_resid = resid; 400 } else { 401 /* if we write and we're synchronous, update node */ 402 if ((resid > uio->uio_resid) && ((ioflag & IO_SYNC) == IO_SYNC)) 403 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 404 } 405 406 return error; 407} 408 409 410/* --------------------------------------------------------------------- */ 411 412/* 413 * `Special' bmap functionality that translates all incomming requests to 414 * translate to vop_strategy() calls with the same blocknumbers effectively 415 * not translating at all. 416 */ 417 418int 419udf_trivial_bmap(void *v) 420{ 421 struct vop_bmap_args /* { 422 struct vnode *a_vp; 423 daddr_t a_bn; 424 struct vnode **a_vpp; 425 daddr_t *a_bnp; 426 int *a_runp; 427 } */ *ap = v; 428 struct vnode *vp = ap->a_vp; /* our node */ 429 struct vnode **vpp = ap->a_vpp; /* return node */ 430 daddr_t *bnp = ap->a_bnp; /* translated */ 431 daddr_t bn = ap->a_bn; /* origional */ 432 int *runp = ap->a_runp; 433 struct udf_node *udf_node = VTOI(vp); 434 uint32_t lb_size; 435 436 /* get logical block size */ 437 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 438 439 /* could return `-1' to indicate holes/zeros */ 440 /* translate 1:1 */ 441 *bnp = bn; 442 443 /* set the vnode to read the data from with strategy on itself */ 444 if (vpp) 445 *vpp = vp; 446 447 /* set runlength of maximum block size */ 448 if (runp) 449 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 450 451 /* return success */ 452 return 0; 453} 454 455/* --------------------------------------------------------------------- */ 456 457int 458udf_vfsstrategy(void *v) 459{ 460 struct vop_strategy_args /* { 461 struct vnode *a_vp; 462 struct buf *a_bp; 463 } */ *ap = v; 464 struct vnode *vp = ap->a_vp; 465 struct buf *bp = ap->a_bp; 466 struct udf_node *udf_node = VTOI(vp); 467 uint32_t lb_size, from, sectors; 468 int error; 469 470 DPRINTF(STRATEGY, ("udf_strategy called\n")); 471 472 /* check if we ought to be here */ 473 if (vp->v_type == VBLK || vp->v_type == VCHR) 474 panic("udf_strategy: spec"); 475 476 /* only filebuffers ought to be read/write by this, no descriptors */ 477 assert(bp->b_blkno >= 0); 478 479 /* get sector size */ 480 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 481 482 /* calculate sector to start from */ 483 from = bp->b_blkno; 484 485 /* calculate length to fetch/store in sectors */ 486 sectors = bp->b_bcount / lb_size; 487 assert(bp->b_bcount > 0); 488 489 /* NEVER assume later that this buffer is already translated */ 490 /* bp->b_lblkno = bp->b_blkno; */ 491 492 /* check assertions: we OUGHT to always get multiples of this */ 493 assert(sectors * lb_size == bp->b_bcount); 494 495 /* issue buffer */ 496 error = 0; 497 if (bp->b_flags & B_READ) { 498 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 499 ", sector %d for %d sectors\n", 500 vp, bp, bp->b_blkno, from, sectors)); 501 502 /* read buffer from the udf_node, translate vtop on the way*/ 503 udf_read_filebuf(udf_node, bp); 504 } else { 505 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 506 ", sector %d for %d sectors\n", 507 vp, bp, bp->b_blkno, from, sectors)); 508 509 /* write buffer to the udf_node, translate vtop on the way*/ 510 udf_write_filebuf(udf_node, bp); 511 } 512 513 return bp->b_error; 514} 515 516/* --------------------------------------------------------------------- */ 517 518int 519udf_readdir(void *v) 520{ 521 struct vop_readdir_args /* { 522 struct vnode *a_vp; 523 struct uio *a_uio; 524 kauth_cred_t a_cred; 525 int *a_eofflag; 526 off_t **a_cookies; 527 int *a_ncookies; 528 } */ *ap = v; 529 struct uio *uio = ap->a_uio; 530 struct vnode *vp = ap->a_vp; 531 struct udf_node *udf_node = VTOI(vp); 532 struct file_entry *fe; 533 struct extfile_entry *efe; 534 struct fileid_desc *fid; 535 struct dirent *dirent; 536 uint64_t file_size, diroffset, transoffset; 537 uint32_t lb_size; 538 int error; 539 540 DPRINTF(READDIR, ("udf_readdir called\n")); 541 542 /* This operation only makes sense on directory nodes. */ 543 if (vp->v_type != VDIR) 544 return ENOTDIR; 545 546 /* get directory filesize */ 547 if (udf_node->fe) { 548 fe = udf_node->fe; 549 file_size = udf_rw64(fe->inf_len); 550 } else { 551 assert(udf_node->efe); 552 efe = udf_node->efe; 553 file_size = udf_rw64(efe->inf_len); 554 } 555 556 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 557 558 /* 559 * Add `.' pseudo entry if at offset zero since its not in the fid 560 * stream 561 */ 562 if (uio->uio_offset == 0) { 563 DPRINTF(READDIR, ("\t'.' inserted\n")); 564 strcpy(dirent->d_name, "."); 565 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 566 dirent->d_type = DT_DIR; 567 dirent->d_namlen = strlen(dirent->d_name); 568 dirent->d_reclen = _DIRENT_SIZE(dirent); 569 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 570 571 /* mark with magic value that we have done the dummy */ 572 uio->uio_offset = UDF_DIRCOOKIE_DOT; 573 } 574 575 /* we are called just as long as we keep on pushing data in */ 576 error = 0; 577 if (uio->uio_offset < file_size) { 578 /* allocate temporary space for fid */ 579 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 580 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 581 582 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 583 uio->uio_offset = 0; 584 585 diroffset = uio->uio_offset; 586 transoffset = diroffset; 587 while (diroffset < file_size) { 588 DPRINTF(READDIR, ("\tread in fid stream\n")); 589 /* transfer a new fid/dirent */ 590 error = udf_read_fid_stream(vp, &diroffset, 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 644int 645udf_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); 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 error = EJUSTRETURN; 766 } 767 } 768 /* done */ 769 } else { 770 /* try to create/reuse the node */ 771 error = udf_get_node(ump, &icb_loc, &res_node); 772 if (!error) { 773 /* 774 * If we are not at the last path component 775 * and found a non-directory or non-link entry 776 * (which may itself be pointing to a 777 * directory), raise an error. 778 */ 779 vnodetp = res_node->vnode->v_type; 780 if ((vnodetp != VDIR) && (vnodetp != VLNK)) { 781 if (!islastcn) 782 error = ENOTDIR; 783 } 784 785 } 786 if (!error) { 787 *vpp = res_node->vnode; 788 } 789 } 790 } 791 792out: 793 /* 794 * Store result in the cache if requested. If we are creating a file, 795 * the file might not be found and thus putting it into the namecache 796 * might be seen as negative caching. 797 */ 798 if (nameiop != CREATE) 799 cache_enter(dvp, *vpp, cnp); 800 801 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 802 803 return error; 804} 805 806/* --------------------------------------------------------------------- */ 807 808int 809udf_getattr(void *v) 810{ 811 struct vop_getattr_args /* { 812 struct vnode *a_vp; 813 struct vattr *a_vap; 814 kauth_cred_t a_cred; 815 struct lwp *a_l; 816 } */ *ap = v; 817 struct vnode *vp = ap->a_vp; 818 struct udf_node *udf_node = VTOI(vp); 819 struct udf_mount *ump = udf_node->ump; 820 struct file_entry *fe = udf_node->fe; 821 struct extfile_entry *efe = udf_node->efe; 822 struct filetimes_extattr_entry *ft_extattr; 823 struct device_extattr_entry *devattr; 824 struct vattr *vap = ap->a_vap; 825 struct timestamp *atime, *mtime, *attrtime, *creatime; 826 uint64_t filesize, blkssize; 827 uint32_t nlink; 828 uint32_t offset, a_l; 829 uint8_t *filedata; 830 uid_t uid; 831 gid_t gid; 832 int error; 833 834 DPRINTF(CALL, ("udf_getattr called\n")); 835 836 /* update times before we returning values */ 837 udf_itimes(udf_node, NULL, NULL, NULL); 838 839 /* get descriptor information */ 840 if (fe) { 841 nlink = udf_rw16(fe->link_cnt); 842 uid = (uid_t)udf_rw32(fe->uid); 843 gid = (gid_t)udf_rw32(fe->gid); 844 filesize = udf_rw64(fe->inf_len); 845 blkssize = udf_rw64(fe->logblks_rec); 846 atime = &fe->atime; 847 mtime = &fe->mtime; 848 attrtime = &fe->attrtime; 849 filedata = fe->data; 850 851 /* initial guess */ 852 creatime = mtime; 853 854 /* check our extended attribute if present */ 855 error = udf_extattr_search_intern(udf_node, 856 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 857 if (!error) { 858 ft_extattr = (struct filetimes_extattr_entry *) 859 (filedata + offset); 860 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 861 creatime = &ft_extattr->times[0]; 862 } 863 } else { 864 assert(udf_node->efe); 865 nlink = udf_rw16(efe->link_cnt); 866 uid = (uid_t)udf_rw32(efe->uid); 867 gid = (gid_t)udf_rw32(efe->gid); 868 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 869 blkssize = udf_rw64(efe->logblks_rec); 870 atime = &efe->atime; 871 mtime = &efe->mtime; 872 attrtime = &efe->attrtime; 873 creatime = &efe->ctime; 874 filedata = efe->data; 875 } 876 877 /* do the uid/gid translation game */ 878 if (uid == (uid_t) -1) 879 uid = ump->mount_args.anon_uid; 880 if (gid == (gid_t) -1) 881 gid = ump->mount_args.anon_gid; 882 883 /* fill in struct vattr with values from the node */ 884 vattr_null(vap); 885 vap->va_type = vp->v_type; 886 vap->va_mode = udf_getaccessmode(udf_node); 887 vap->va_nlink = nlink; 888 vap->va_uid = uid; 889 vap->va_gid = gid; 890 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 891 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 892 vap->va_size = filesize; 893 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 894 895 /* 896 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 897 * 1 to the link count if its a directory we're requested attributes 898 * of. 899 */ 900 if (vap->va_type == VDIR) 901 vap->va_nlink++; 902 903 /* access times */ 904 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 905 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 906 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 907 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 908 909 vap->va_gen = 1; /* no multiple generations yes (!?) */ 910 vap->va_flags = 0; /* no flags */ 911 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 912 vap->va_filerev = 1; /* TODO file revision numbers? */ 913 vap->va_vaflags = 0; 914 /* TODO get vaflags from the extended attributes? */ 915 916 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 917 error = udf_extattr_search_intern(udf_node, 918 UDF_DEVICESPEC_ATTR_NO, "", 919 &offset, &a_l); 920 /* if error, deny access */ 921 if (error || (filedata == NULL)) { 922 vap->va_mode = 0; /* or v_type = VNON? */ 923 } else { 924 devattr = (struct device_extattr_entry *) 925 filedata + offset; 926 vap->va_rdev = makedev( 927 udf_rw32(devattr->major), 928 udf_rw32(devattr->minor) 929 ); 930 /* TODO we could check the implementator */ 931 } 932 } 933 934 return 0; 935} 936 937/* --------------------------------------------------------------------- */ 938 939static int 940udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 941 kauth_cred_t cred) 942{ 943 struct udf_node *udf_node = VTOI(vp); 944 uid_t uid; 945 gid_t gid; 946 int error; 947 948#ifdef notyet 949 /* TODO get vaflags from the extended attributes? */ 950 /* Immutable or append-only files cannot be modified, either. */ 951 if (udf_node->flags & (IMMUTABLE | APPEND)) 952 return EPERM; 953#endif 954 955 if (vp->v_mount->mnt_flag & MNT_RDONLY) 956 return EROFS; 957 958 /* retrieve old values */ 959 udf_getownership(udf_node, &uid, &gid); 960 961 /* only one could be specified */ 962 if (new_uid == VNOVAL) 963 new_uid = uid; 964 if (new_gid == VNOVAL) 965 new_gid = gid; 966 967 /* check if we can fit it in an 32 bits */ 968 if ((uid_t) ((uint32_t) new_uid) != new_uid) 969 return EINVAL; 970 if ((gid_t) ((uint32_t) new_gid) != new_gid) 971 return EINVAL; 972 973 /* check permissions */ 974 error = genfs_can_chown(vp, cred, uid, gid, new_uid, new_gid); 975 if (error) 976 return (error); 977 978 /* change the ownership */ 979 udf_setownership(udf_node, new_uid, new_gid); 980 981 /* mark node changed */ 982 udf_node->i_flags |= IN_CHANGE; 983 if (vp->v_mount->mnt_flag & MNT_RELATIME) 984 udf_node->i_flags |= IN_ACCESS; 985 986 return 0; 987} 988 989 990static int 991udf_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 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1022 udf_node->i_flags |= IN_ACCESS; 1023 1024 return 0; 1025} 1026 1027 1028/* exported */ 1029int 1030udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1031{ 1032 struct udf_node *udf_node = VTOI(vp); 1033 int error, extended; 1034 1035 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1036 return EROFS; 1037 1038 /* Decide whether this is a valid operation based on the file type. */ 1039 switch (vp->v_type) { 1040 case VDIR: 1041 return EISDIR; 1042 case VREG: 1043 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1044 return EROFS; 1045 break; 1046 case VBLK: 1047 /* FALLTHROUGH */ 1048 case VCHR: 1049 /* FALLTHROUGH */ 1050 case VFIFO: 1051 /* Allow modifications of special files even if in the file 1052 * system is mounted read-only (we are not modifying the 1053 * files themselves, but the objects they represent). */ 1054 return 0; 1055 default: 1056 /* Anything else is unsupported. */ 1057 return EOPNOTSUPP; 1058 } 1059 1060#if notyet 1061 /* TODO get vaflags from the extended attributes? */ 1062 /* Immutable or append-only files cannot be modified, either. */ 1063 if (node->flags & (IMMUTABLE | APPEND)) 1064 return EPERM; 1065#endif 1066 1067 /* resize file to the requested size */ 1068 error = udf_resize_node(udf_node, newsize, &extended); 1069 1070 if (error == 0) { 1071 /* mark change */ 1072 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1073 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1074 udf_node->i_flags |= IN_ACCESS; 1075 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1076 udf_update(vp, NULL, NULL, NULL, 0); 1077 } 1078 1079 return error; 1080} 1081 1082 1083static int 1084udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1085{ 1086 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1087 return EROFS; 1088 1089 /* XXX we can't do this yet, but erroring out is enoying XXX */ 1090 1091 return 0; 1092} 1093 1094 1095static int 1096udf_chtimes(struct vnode *vp, 1097 struct timespec *atime, struct timespec *mtime, 1098 struct timespec *birthtime, int setattrflags, 1099 kauth_cred_t cred) 1100{ 1101 struct udf_node *udf_node = VTOI(vp); 1102 uid_t uid; 1103 gid_t gid; 1104 int error; 1105 1106#ifdef notyet 1107 /* TODO get vaflags from the extended attributes? */ 1108 /* Immutable or append-only files cannot be modified, either. */ 1109 if (udf_node->flags & (IMMUTABLE | APPEND)) 1110 return EPERM; 1111#endif 1112 1113 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1114 return EROFS; 1115 1116 /* retrieve uid/gid values */ 1117 udf_getownership(udf_node, &uid, &gid); 1118 1119 /* check permissions */ 1120 error = genfs_can_chtimes(vp, setattrflags, uid, cred); 1121 if (error) 1122 return (error); 1123 1124 /* update node flags depending on what times are passed */ 1125 if (atime->tv_sec != VNOVAL) 1126 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1127 udf_node->i_flags |= IN_ACCESS; 1128 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1129 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1130 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1131 udf_node->i_flags |= IN_ACCESS; 1132 } 1133 1134 return udf_update(vp, atime, mtime, birthtime, 0); 1135} 1136 1137 1138int 1139udf_setattr(void *v) 1140{ 1141 struct vop_setattr_args /* { 1142 struct vnode *a_vp; 1143 struct vattr *a_vap; 1144 kauth_cred_t a_cred; 1145 struct lwp *a_l; 1146 } */ *ap = v; 1147 struct vnode *vp = ap->a_vp; 1148/* struct udf_node *udf_node = VTOI(vp); */ 1149/* struct udf_mount *ump = udf_node->ump; */ 1150 kauth_cred_t cred = ap->a_cred; 1151 struct vattr *vap = ap->a_vap; 1152 int error; 1153 1154 DPRINTF(CALL, ("udf_setattr called\n")); 1155 1156 /* Abort if any unsettable attribute is given. */ 1157 error = 0; 1158 if (vap->va_type != VNON || 1159 vap->va_nlink != VNOVAL || 1160 vap->va_fsid != VNOVAL || 1161 vap->va_fileid != VNOVAL || 1162 vap->va_blocksize != VNOVAL || 1163#ifdef notyet 1164 /* checks are debated */ 1165 vap->va_ctime.tv_sec != VNOVAL || 1166 vap->va_ctime.tv_nsec != VNOVAL || 1167 vap->va_birthtime.tv_sec != VNOVAL || 1168 vap->va_birthtime.tv_nsec != VNOVAL || 1169#endif 1170 vap->va_gen != VNOVAL || 1171 vap->va_rdev != VNOVAL || 1172 vap->va_bytes != VNOVAL) 1173 error = EINVAL; 1174 1175 DPRINTF(ATTR, ("setattr changing:\n")); 1176 if (error == 0 && (vap->va_flags != VNOVAL)) { 1177 DPRINTF(ATTR, ("\tchflags\n")); 1178 error = udf_chflags(vp, vap->va_flags, cred); 1179 } 1180 1181 if (error == 0 && (vap->va_size != VNOVAL)) { 1182 DPRINTF(ATTR, ("\tchsize\n")); 1183 error = udf_chsize(vp, vap->va_size, cred); 1184 } 1185 1186 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1187 DPRINTF(ATTR, ("\tchown\n")); 1188 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1189 } 1190 1191 if (error == 0 && (vap->va_mode != VNOVAL)) { 1192 DPRINTF(ATTR, ("\tchmod\n")); 1193 error = udf_chmod(vp, vap->va_mode, cred); 1194 } 1195 1196 if (error == 0 && 1197 ((vap->va_atime.tv_sec != VNOVAL && 1198 vap->va_atime.tv_nsec != VNOVAL) || 1199 (vap->va_mtime.tv_sec != VNOVAL && 1200 vap->va_mtime.tv_nsec != VNOVAL)) 1201 ) { 1202 DPRINTF(ATTR, ("\tchtimes\n")); 1203 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1204 &vap->va_birthtime, vap->va_vaflags, cred); 1205 } 1206 VN_KNOTE(vp, NOTE_ATTRIB); 1207 1208 return error; 1209} 1210 1211/* --------------------------------------------------------------------- */ 1212 1213/* 1214 * Return POSIX pathconf information for UDF file systems. 1215 */ 1216int 1217udf_pathconf(void *v) 1218{ 1219 struct vop_pathconf_args /* { 1220 struct vnode *a_vp; 1221 int a_name; 1222 register_t *a_retval; 1223 } */ *ap = v; 1224 uint32_t bits; 1225 1226 DPRINTF(CALL, ("udf_pathconf called\n")); 1227 1228 switch (ap->a_name) { 1229 case _PC_LINK_MAX: 1230 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1231 return 0; 1232 case _PC_NAME_MAX: 1233 *ap->a_retval = UDF_MAXNAMLEN; 1234 return 0; 1235 case _PC_PATH_MAX: 1236 *ap->a_retval = PATH_MAX; 1237 return 0; 1238 case _PC_PIPE_BUF: 1239 *ap->a_retval = PIPE_BUF; 1240 return 0; 1241 case _PC_CHOWN_RESTRICTED: 1242 *ap->a_retval = 1; 1243 return 0; 1244 case _PC_NO_TRUNC: 1245 *ap->a_retval = 1; 1246 return 0; 1247 case _PC_SYNC_IO: 1248 *ap->a_retval = 0; /* synchronised is off for performance */ 1249 return 0; 1250 case _PC_FILESIZEBITS: 1251 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1252 bits = 64; /* XXX ought to deliver 65 */ 1253#if 0 1254 if (udf_node) 1255 bits = 64 * vp->v_mount->mnt_dev_bshift; 1256#endif 1257 *ap->a_retval = bits; 1258 return 0; 1259 } 1260 1261 return EINVAL; 1262} 1263 1264 1265/* --------------------------------------------------------------------- */ 1266 1267int 1268udf_open(void *v) 1269{ 1270 struct vop_open_args /* { 1271 struct vnode *a_vp; 1272 int a_mode; 1273 kauth_cred_t a_cred; 1274 struct proc *a_p; 1275 } */ *ap = v; 1276 int flags; 1277 1278 DPRINTF(CALL, ("udf_open called\n")); 1279 1280 /* 1281 * Files marked append-only must be opened for appending. 1282 * TODO: get chflags(2) flags from extened attribute. 1283 */ 1284 flags = 0; 1285 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1286 return (EPERM); 1287 1288 return 0; 1289} 1290 1291 1292/* --------------------------------------------------------------------- */ 1293 1294int 1295udf_close(void *v) 1296{ 1297 struct vop_close_args /* { 1298 struct vnode *a_vp; 1299 int a_fflag; 1300 kauth_cred_t a_cred; 1301 struct proc *a_p; 1302 } */ *ap = v; 1303 struct vnode *vp = ap->a_vp; 1304 struct udf_node *udf_node = VTOI(vp); 1305 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1306 int error; 1307 1308 DPRINTF(CALL, ("udf_close called\n")); 1309 udf_node = udf_node; /* shut up gcc */ 1310 1311 if (!async && (vp->v_type != VDIR)) { 1312 mutex_enter(vp->v_interlock); 1313 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1314 if (error) 1315 return error; 1316 } 1317 1318 mutex_enter(vp->v_interlock); 1319 if (vp->v_usecount > 1) 1320 udf_itimes(udf_node, NULL, NULL, NULL); 1321 mutex_exit(vp->v_interlock); 1322 1323 return 0; 1324} 1325 1326 1327/* --------------------------------------------------------------------- */ 1328 1329static int 1330udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1331{ 1332 int flags; 1333 1334 /* check if we are allowed to write */ 1335 switch (vap->va_type) { 1336 case VDIR: 1337 case VLNK: 1338 case VREG: 1339 /* 1340 * normal nodes: check if we're on a read-only mounted 1341 * filingsystem and bomb out if we're trying to write. 1342 */ 1343 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1344 return EROFS; 1345 break; 1346 case VBLK: 1347 case VCHR: 1348 case VSOCK: 1349 case VFIFO: 1350 /* 1351 * special nodes: even on read-only mounted filingsystems 1352 * these are allowed to be written to if permissions allow. 1353 */ 1354 break; 1355 default: 1356 /* no idea what this is */ 1357 return EINVAL; 1358 } 1359 1360 /* noone may write immutable files */ 1361 /* TODO: get chflags(2) flags from extened attribute. */ 1362 flags = 0; 1363 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1364 return EPERM; 1365 1366 return 0; 1367} 1368 1369static int 1370udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1371 kauth_cred_t cred) 1372{ 1373 1374 /* ask the generic genfs_can_access to advice on security */ 1375 return genfs_can_access(vp->v_type, 1376 vap->va_mode, vap->va_uid, vap->va_gid, 1377 mode, cred); 1378} 1379 1380int 1381udf_access(void *v) 1382{ 1383 struct vop_access_args /* { 1384 struct vnode *a_vp; 1385 int a_mode; 1386 kauth_cred_t a_cred; 1387 struct proc *a_p; 1388 } */ *ap = v; 1389 struct vnode *vp = ap->a_vp; 1390 mode_t mode = ap->a_mode; 1391 kauth_cred_t cred = ap->a_cred; 1392 /* struct udf_node *udf_node = VTOI(vp); */ 1393 struct vattr vap; 1394 int error; 1395 1396 DPRINTF(CALL, ("udf_access called\n")); 1397 1398 error = VOP_GETATTR(vp, &vap, NULL); 1399 if (error) 1400 return error; 1401 1402 error = udf_check_possible(vp, &vap, mode); 1403 if (error) 1404 return error; 1405 1406 error = udf_check_permitted(vp, &vap, mode, cred); 1407 1408 return error; 1409} 1410 1411/* --------------------------------------------------------------------- */ 1412 1413int 1414udf_create(void *v) 1415{ 1416 struct vop_create_args /* { 1417 struct vnode *a_dvp; 1418 struct vnode **a_vpp; 1419 struct componentname *a_cnp; 1420 struct vattr *a_vap; 1421 } */ *ap = v; 1422 struct vnode *dvp = ap->a_dvp; 1423 struct vnode **vpp = ap->a_vpp; 1424 struct vattr *vap = ap->a_vap; 1425 struct componentname *cnp = ap->a_cnp; 1426 int error; 1427 1428 DPRINTF(CALL, ("udf_create called\n")); 1429 error = udf_create_node(dvp, vpp, vap, cnp); 1430 1431 vput(dvp); 1432 return error; 1433} 1434 1435/* --------------------------------------------------------------------- */ 1436 1437int 1438udf_mknod(void *v) 1439{ 1440 struct vop_mknod_args /* { 1441 struct vnode *a_dvp; 1442 struct vnode **a_vpp; 1443 struct componentname *a_cnp; 1444 struct vattr *a_vap; 1445 } */ *ap = v; 1446 struct vnode *dvp = ap->a_dvp; 1447 struct vnode **vpp = ap->a_vpp; 1448 struct vattr *vap = ap->a_vap; 1449 struct componentname *cnp = ap->a_cnp; 1450 int error; 1451 1452 DPRINTF(CALL, ("udf_mknod called\n")); 1453 error = udf_create_node(dvp, vpp, vap, cnp); 1454 1455 vput(dvp); 1456 return error; 1457} 1458 1459/* --------------------------------------------------------------------- */ 1460 1461int 1462udf_mkdir(void *v) 1463{ 1464 struct vop_mkdir_args /* { 1465 struct vnode *a_dvp; 1466 struct vnode **a_vpp; 1467 struct componentname *a_cnp; 1468 struct vattr *a_vap; 1469 } */ *ap = v; 1470 struct vnode *dvp = ap->a_dvp; 1471 struct vnode **vpp = ap->a_vpp; 1472 struct vattr *vap = ap->a_vap; 1473 struct componentname *cnp = ap->a_cnp; 1474 int error; 1475 1476 DPRINTF(CALL, ("udf_mkdir called\n")); 1477 error = udf_create_node(dvp, vpp, vap, cnp); 1478 1479 vput(dvp); 1480 return error; 1481} 1482 1483/* --------------------------------------------------------------------- */ 1484 1485static int 1486udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1487{ 1488 struct udf_node *udf_node, *dir_node; 1489 struct vattr vap; 1490 int error; 1491 1492 DPRINTF(CALL, ("udf_link called\n")); 1493 KASSERT(dvp != vp); 1494 KASSERT(vp->v_type != VDIR); 1495 KASSERT(dvp->v_mount == vp->v_mount); 1496 1497 /* lock node */ 1498 error = vn_lock(vp, LK_EXCLUSIVE); 1499 if (error) 1500 return error; 1501 1502 /* get attributes */ 1503 dir_node = VTOI(dvp); 1504 udf_node = VTOI(vp); 1505 1506 error = VOP_GETATTR(vp, &vap, FSCRED); 1507 if (error) { 1508 VOP_UNLOCK(vp); 1509 return error; 1510 } 1511 1512 /* check link count overflow */ 1513 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1514 VOP_UNLOCK(vp); 1515 return EMLINK; 1516 } 1517 1518 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1519 if (error) 1520 VOP_UNLOCK(vp); 1521 return error; 1522} 1523 1524int 1525udf_link(void *v) 1526{ 1527 struct vop_link_args /* { 1528 struct vnode *a_dvp; 1529 struct vnode *a_vp; 1530 struct componentname *a_cnp; 1531 } */ *ap = v; 1532 struct vnode *dvp = ap->a_dvp; 1533 struct vnode *vp = ap->a_vp; 1534 struct componentname *cnp = ap->a_cnp; 1535 int error; 1536 1537 error = udf_do_link(dvp, vp, cnp); 1538 if (error) 1539 VOP_ABORTOP(dvp, cnp); 1540 1541 VN_KNOTE(vp, NOTE_LINK); 1542 VN_KNOTE(dvp, NOTE_WRITE); 1543 vput(dvp); 1544 1545 return error; 1546} 1547 1548/* --------------------------------------------------------------------- */ 1549 1550static int 1551udf_do_symlink(struct udf_node *udf_node, char *target) 1552{ 1553 struct pathcomp pathcomp; 1554 uint8_t *pathbuf, *pathpos, *compnamepos; 1555 char *mntonname; 1556 int pathlen, len, compnamelen, mntonnamelen; 1557 int error; 1558 1559 /* process `target' to an UDF structure */ 1560 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1561 pathpos = pathbuf; 1562 pathlen = 0; 1563 1564 if (*target == '/') { 1565 /* symlink starts from the root */ 1566 len = UDF_PATH_COMP_SIZE; 1567 memset(&pathcomp, 0, len); 1568 pathcomp.type = UDF_PATH_COMP_ROOT; 1569 1570 /* check if its mount-point relative! */ 1571 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1572 mntonnamelen = strlen(mntonname); 1573 if (strlen(target) >= mntonnamelen) { 1574 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1575 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1576 target += mntonnamelen; 1577 } 1578 } else { 1579 target++; 1580 } 1581 1582 memcpy(pathpos, &pathcomp, len); 1583 pathpos += len; 1584 pathlen += len; 1585 } 1586 1587 error = 0; 1588 while (*target) { 1589 /* ignore multiple '/' */ 1590 while (*target == '/') { 1591 target++; 1592 } 1593 if (!*target) 1594 break; 1595 1596 /* extract component name */ 1597 compnamelen = 0; 1598 compnamepos = target; 1599 while ((*target) && (*target != '/')) { 1600 target++; 1601 compnamelen++; 1602 } 1603 1604 /* just trunc if too long ?? (security issue) */ 1605 if (compnamelen >= 127) { 1606 error = ENAMETOOLONG; 1607 break; 1608 } 1609 1610 /* convert unix name to UDF name */ 1611 len = sizeof(struct pathcomp); 1612 memset(&pathcomp, 0, len); 1613 pathcomp.type = UDF_PATH_COMP_NAME; 1614 len = UDF_PATH_COMP_SIZE; 1615 1616 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1617 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1618 if ((compnamelen == 1) && (*compnamepos == '.')) 1619 pathcomp.type = UDF_PATH_COMP_CURDIR; 1620 1621 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1622 unix_to_udf_name( 1623 (char *) &pathcomp.ident, &pathcomp.l_ci, 1624 compnamepos, compnamelen, 1625 &udf_node->ump->logical_vol->desc_charset); 1626 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1627 } 1628 1629 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1630 error = ENAMETOOLONG; 1631 break; 1632 } 1633 1634 memcpy(pathpos, &pathcomp, len); 1635 pathpos += len; 1636 pathlen += len; 1637 } 1638 1639 if (error) { 1640 /* aparently too big */ 1641 free(pathbuf, M_UDFTEMP); 1642 return error; 1643 } 1644 1645 error = udf_grow_node(udf_node, pathlen); 1646 if (error) { 1647 /* failed to pregrow node */ 1648 free(pathbuf, M_UDFTEMP); 1649 return error; 1650 } 1651 1652 /* write out structure on the new file */ 1653 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1654 pathbuf, pathlen, 0, 1655 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1656 FSCRED, NULL, NULL); 1657 1658 /* return status of symlink contents writeout */ 1659 free(pathbuf, M_UDFTEMP); 1660 return error; 1661} 1662 1663 1664int 1665udf_symlink(void *v) 1666{ 1667 struct vop_symlink_args /* { 1668 struct vnode *a_dvp; 1669 struct vnode **a_vpp; 1670 struct componentname *a_cnp; 1671 struct vattr *a_vap; 1672 char *a_target; 1673 } */ *ap = v; 1674 struct vnode *dvp = ap->a_dvp; 1675 struct vnode **vpp = ap->a_vpp; 1676 struct vattr *vap = ap->a_vap; 1677 struct componentname *cnp = ap->a_cnp; 1678 struct udf_node *dir_node; 1679 struct udf_node *udf_node; 1680 int error; 1681 1682 DPRINTF(CALL, ("udf_symlink called\n")); 1683 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1684 error = udf_create_node(dvp, vpp, vap, cnp); 1685 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1686 if (!error) { 1687 dir_node = VTOI(dvp); 1688 udf_node = VTOI(*vpp); 1689 KASSERT(udf_node); 1690 error = udf_do_symlink(udf_node, ap->a_target); 1691 if (error) { 1692 /* remove node */ 1693 udf_shrink_node(udf_node, 0); 1694 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1695 } 1696 } 1697 vput(dvp); 1698 return error; 1699} 1700 1701/* --------------------------------------------------------------------- */ 1702 1703int 1704udf_readlink(void *v) 1705{ 1706 struct vop_readlink_args /* { 1707 struct vnode *a_vp; 1708 struct uio *a_uio; 1709 kauth_cred_t a_cred; 1710 } */ *ap = v; 1711 struct vnode *vp = ap->a_vp; 1712 struct uio *uio = ap->a_uio; 1713 kauth_cred_t cred = ap->a_cred; 1714 struct udf_node *udf_node; 1715 struct pathcomp pathcomp; 1716 struct vattr vattr; 1717 uint8_t *pathbuf, *targetbuf, *tmpname; 1718 uint8_t *pathpos, *targetpos; 1719 char *mntonname; 1720 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1721 int first, error; 1722 1723 DPRINTF(CALL, ("udf_readlink called\n")); 1724 1725 udf_node = VTOI(vp); 1726 error = VOP_GETATTR(vp, &vattr, cred); 1727 if (error) 1728 return error; 1729 1730 /* claim temporary buffers for translation */ 1731 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1732 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1733 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1734 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1735 memset(targetbuf, 0, PATH_MAX); 1736 1737 /* read contents of file in our temporary buffer */ 1738 error = vn_rdwr(UIO_READ, udf_node->vnode, 1739 pathbuf, vattr.va_size, 0, 1740 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1741 FSCRED, NULL, NULL); 1742 if (error) { 1743 /* failed to read in symlink contents */ 1744 free(pathbuf, M_UDFTEMP); 1745 free(targetbuf, M_UDFTEMP); 1746 free(tmpname, M_UDFTEMP); 1747 return error; 1748 } 1749 1750 /* convert to a unix path */ 1751 pathpos = pathbuf; 1752 pathlen = 0; 1753 targetpos = targetbuf; 1754 targetlen = PATH_MAX; 1755 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1756 mntonnamelen = strlen(mntonname); 1757 1758 error = 0; 1759 first = 1; 1760 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1761 len = UDF_PATH_COMP_SIZE; 1762 memcpy(&pathcomp, pathpos, len); 1763 l_ci = pathcomp.l_ci; 1764 switch (pathcomp.type) { 1765 case UDF_PATH_COMP_ROOT : 1766 /* XXX should check for l_ci; bugcompatible now */ 1767 if ((targetlen < 1) || !first) { 1768 error = EINVAL; 1769 break; 1770 } 1771 *targetpos++ = '/'; targetlen--; 1772 break; 1773 case UDF_PATH_COMP_MOUNTROOT : 1774 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1775 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1776 error = EINVAL; 1777 break; 1778 } 1779 memcpy(targetpos, mntonname, mntonnamelen); 1780 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1781 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1782 /* more follows, so must be directory */ 1783 *targetpos++ = '/'; targetlen--; 1784 } 1785 break; 1786 case UDF_PATH_COMP_PARENTDIR : 1787 /* XXX should check for l_ci; bugcompatible now */ 1788 if (targetlen < 3) { 1789 error = EINVAL; 1790 break; 1791 } 1792 *targetpos++ = '.'; targetlen--; 1793 *targetpos++ = '.'; targetlen--; 1794 *targetpos++ = '/'; targetlen--; 1795 break; 1796 case UDF_PATH_COMP_CURDIR : 1797 /* XXX should check for l_ci; bugcompatible now */ 1798 if (targetlen < 2) { 1799 error = EINVAL; 1800 break; 1801 } 1802 *targetpos++ = '.'; targetlen--; 1803 *targetpos++ = '/'; targetlen--; 1804 break; 1805 case UDF_PATH_COMP_NAME : 1806 if (l_ci == 0) { 1807 error = EINVAL; 1808 break; 1809 } 1810 memset(tmpname, 0, PATH_MAX); 1811 memcpy(&pathcomp, pathpos, len + l_ci); 1812 udf_to_unix_name(tmpname, MAXPATHLEN, 1813 pathcomp.ident, l_ci, 1814 &udf_node->ump->logical_vol->desc_charset); 1815 namelen = strlen(tmpname); 1816 if (targetlen < namelen + 1) { 1817 error = EINVAL; 1818 break; 1819 } 1820 memcpy(targetpos, tmpname, namelen); 1821 targetpos += namelen; targetlen -= namelen; 1822 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1823 /* more follows, so must be directory */ 1824 *targetpos++ = '/'; targetlen--; 1825 } 1826 break; 1827 default : 1828 error = EINVAL; 1829 break; 1830 } 1831 first = 0; 1832 if (error) 1833 break; 1834 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1835 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1836 1837 } 1838 /* all processed? */ 1839 if (vattr.va_size - pathlen > 0) 1840 error = EINVAL; 1841 1842 /* uiomove() to destination */ 1843 if (!error) 1844 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1845 1846 free(pathbuf, M_UDFTEMP); 1847 free(targetbuf, M_UDFTEMP); 1848 free(tmpname, M_UDFTEMP); 1849 1850 return error; 1851} 1852 1853/* --------------------------------------------------------------------- */ 1854 1855/* 1856 * Check if source directory is in the path of the target directory. Target 1857 * is supplied locked, source is unlocked. The target is always vput before 1858 * returning. Modeled after UFS. 1859 * 1860 * If source is on the path from target to the root, return error. 1861 */ 1862 1863static int 1864udf_on_rootpath(struct udf_node *source, struct udf_node *target) 1865{ 1866 struct udf_mount *ump = target->ump; 1867 struct udf_node *res_node; 1868 struct long_ad icb_loc, *root_icb; 1869 const char *name; 1870 int namelen; 1871 int error, found; 1872 1873 name = ".."; 1874 namelen = 2; 1875 error = 0; 1876 res_node = target; 1877 1878 root_icb = &ump->fileset_desc->rootdir_icb; 1879 1880 /* if nodes are equal, it is no use looking */ 1881 if (udf_compare_icb(&source->loc, &target->loc) == 0) { 1882 error = EEXIST; 1883 goto out; 1884 } 1885 1886 /* nothing can exist before the root */ 1887 if (udf_compare_icb(root_icb, &target->loc) == 0) { 1888 error = 0; 1889 goto out; 1890 } 1891 1892 for (;;) { 1893 DPRINTF(NODE, ("udf_on_rootpath : " 1894 "source vp %p, looking at vp %p\n", 1895 source->vnode, res_node->vnode)); 1896 1897 /* sanity check */ 1898 if (res_node->vnode->v_type != VDIR) { 1899 error = ENOTDIR; 1900 goto out; 1901 } 1902 1903 /* go down one level */ 1904 error = udf_lookup_name_in_dir(res_node->vnode, name, namelen, 1905 &icb_loc, &found); 1906 DPRINTF(NODE, ("\tlookup of '..' resulted in error %d, " 1907 "found %d\n", error, found)); 1908 1909 if (!found) 1910 error = ENOENT; 1911 if (error) 1912 goto out; 1913 1914 /* did we encounter source node? */ 1915 if (udf_compare_icb(&icb_loc, &source->loc) == 0) { 1916 error = EINVAL; 1917 goto out; 1918 } 1919 1920 /* did we encounter the root node? */ 1921 if (udf_compare_icb(&icb_loc, root_icb) == 0) { 1922 error = 0; 1923 goto out; 1924 } 1925 1926 /* push our intermediate node, we're done with it */ 1927 /* DPRINTF(NODE, ("\tvput %p\n", target->vnode)); */ 1928 vput(res_node->vnode); 1929 1930 DPRINTF(NODE, ("\tgetting the .. node\n")); 1931 error = udf_get_node(ump, &icb_loc, &res_node); 1932 1933 if (error) { /* argh, bail out */ 1934 KASSERT(res_node == NULL); 1935 // res_node = NULL; 1936 goto out; 1937 } 1938 } 1939out: 1940 DPRINTF(NODE, ("\tresult: %svalid, error = %d\n", error?"in":"", error)); 1941 1942 /* put our last node */ 1943 if (res_node) 1944 vput(res_node->vnode); 1945 1946 return error; 1947} 1948 1949/* note: i tried to follow the logics of the tmpfs rename code */ 1950int 1951udf_rename(void *v) 1952{ 1953 struct vop_rename_args /* { 1954 struct vnode *a_fdvp; 1955 struct vnode *a_fvp; 1956 struct componentname *a_fcnp; 1957 struct vnode *a_tdvp; 1958 struct vnode *a_tvp; 1959 struct componentname *a_tcnp; 1960 } */ *ap = v; 1961 struct vnode *tvp = ap->a_tvp; 1962 struct vnode *tdvp = ap->a_tdvp; 1963 struct vnode *fvp = ap->a_fvp; 1964 struct vnode *fdvp = ap->a_fdvp; 1965 struct componentname *tcnp = ap->a_tcnp; 1966 struct componentname *fcnp = ap->a_fcnp; 1967 struct udf_node *fnode, *fdnode, *tnode, *tdnode; 1968 struct vattr fvap, tvap; 1969 int error; 1970 1971 DPRINTF(CALL, ("udf_rename called\n")); 1972 1973 /* disallow cross-device renames */ 1974 if (fvp->v_mount != tdvp->v_mount || 1975 (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1976 error = EXDEV; 1977 goto out_unlocked; 1978 } 1979 1980 fnode = VTOI(fvp); 1981 fdnode = VTOI(fdvp); 1982 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 1983 tdnode = VTOI(tdvp); 1984 1985 /* lock our source dir */ 1986 if (fdnode != tdnode) { 1987 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1988 if (error != 0) 1989 goto out_unlocked; 1990 } 1991 1992 /* get info about the node to be moved */ 1993 vn_lock(fvp, LK_SHARED | LK_RETRY); 1994 error = VOP_GETATTR(fvp, &fvap, FSCRED); 1995 VOP_UNLOCK(fvp); 1996 KASSERT(error == 0); 1997 1998 /* check when to delete the old already existing entry */ 1999 if (tvp) { 2000 /* get info about the node to be moved to */ 2001 error = VOP_GETATTR(tvp, &tvap, FSCRED); 2002 KASSERT(error == 0); 2003 2004 /* if both dirs, make sure the destination is empty */ 2005 if (fvp->v_type == VDIR && tvp->v_type == VDIR) { 2006 if (tvap.va_nlink > 2) { 2007 error = ENOTEMPTY; 2008 goto out; 2009 } 2010 } 2011 /* if moving dir, make sure destination is dir too */ 2012 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 2013 error = ENOTDIR; 2014 goto out; 2015 } 2016 /* if we're moving a non-directory, make sure dest is no dir */ 2017 if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 2018 error = EISDIR; 2019 goto out; 2020 } 2021 } 2022 2023 /* check if moving a directory to a new parent is allowed */ 2024 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2025 /* release tvp since we might encounter it and lock up */ 2026 if (tvp) 2027 vput(tvp); 2028 2029 /* vref tdvp since we lose its ref in udf_on_rootpath */ 2030 vref(tdvp); 2031 2032 /* search if fnode is a component of tdnode's path to root */ 2033 error = udf_on_rootpath(fnode, tdnode); 2034 2035 DPRINTF(NODE, ("Dir rename allowed ? %s\n", error ? "NO":"YES")); 2036 2037 if (error) { 2038 /* compensate for our vref earlier */ 2039 vrele(tdvp); 2040 goto out; 2041 } 2042 2043 /* relock tdvp; its still here due to the vref earlier */ 2044 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 2045 2046 /* 2047 * re-lookup tvp since the parent has been unlocked, so could 2048 * have changed/removed in the meantime. 2049 */ 2050 error = relookup(tdvp, &tvp, tcnp, 0); 2051 if (error) { 2052 vput(tdvp); 2053 goto out; 2054 } 2055 tnode = (tvp == NULL) ? NULL : VTOI(tvp); 2056 } 2057 2058 /* remove existing entry if present */ 2059 if (tvp) 2060 udf_dir_detach(tdnode->ump, tdnode, tnode, tcnp); 2061 2062 /* create new directory entry for the node */ 2063 error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp); 2064 if (error) 2065 goto out; 2066 2067 /* unlink old directory entry for the node, if failing, unattach new */ 2068 error = udf_dir_detach(tdnode->ump, fdnode, fnode, fcnp); 2069 if (error) 2070 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2071 if (error) 2072 goto out; 2073 2074 /* update tnode's '..' if moving directory to new parent */ 2075 if ((fdnode != tdnode) && (fvp->v_type == VDIR)) { 2076 /* update fnode's '..' entry */ 2077 error = udf_dir_update_rootentry(fnode->ump, fnode, tdnode); 2078 if (error) { 2079 /* 'try' to recover from this situation */ 2080 udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp); 2081 udf_dir_detach(tdnode->ump, tdnode, fnode, tcnp); 2082 } 2083 } 2084 2085out: 2086 if (fdnode != tdnode) 2087 VOP_UNLOCK(fdvp); 2088 2089out_unlocked: 2090 VOP_ABORTOP(tdvp, tcnp); 2091 if (tdvp == tvp) 2092 vrele(tdvp); 2093 else 2094 vput(tdvp); 2095 if (tvp) 2096 vput(tvp); 2097 VOP_ABORTOP(fdvp, fcnp); 2098 2099 /* release source nodes. */ 2100 vrele(fdvp); 2101 vrele(fvp); 2102 2103 return error; 2104} 2105 2106/* --------------------------------------------------------------------- */ 2107 2108int 2109udf_remove(void *v) 2110{ 2111 struct vop_remove_args /* { 2112 struct vnode *a_dvp; 2113 struct vnode *a_vp; 2114 struct componentname *a_cnp; 2115 } */ *ap = v; 2116 struct vnode *dvp = ap->a_dvp; 2117 struct vnode *vp = ap->a_vp; 2118 struct componentname *cnp = ap->a_cnp; 2119 struct udf_node *dir_node = VTOI(dvp); 2120 struct udf_node *udf_node = VTOI(vp); 2121 struct udf_mount *ump = dir_node->ump; 2122 int error; 2123 2124 DPRINTF(CALL, ("udf_remove called\n")); 2125 if (vp->v_type != VDIR) { 2126 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2127 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2128 } else { 2129 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 2130 error = EPERM; 2131 } 2132 2133 if (error == 0) { 2134 VN_KNOTE(vp, NOTE_DELETE); 2135 VN_KNOTE(dvp, NOTE_WRITE); 2136 } 2137 2138 if (dvp == vp) 2139 vrele(vp); 2140 else 2141 vput(vp); 2142 vput(dvp); 2143 2144 return error; 2145} 2146 2147/* --------------------------------------------------------------------- */ 2148 2149int 2150udf_rmdir(void *v) 2151{ 2152 struct vop_rmdir_args /* { 2153 struct vnode *a_dvp; 2154 struct vnode *a_vp; 2155 struct componentname *a_cnp; 2156 } */ *ap = v; 2157 struct vnode *vp = ap->a_vp; 2158 struct vnode *dvp = ap->a_dvp; 2159 struct componentname *cnp = ap->a_cnp; 2160 struct udf_node *dir_node = VTOI(dvp); 2161 struct udf_node *udf_node = VTOI(vp); 2162 struct udf_mount *ump = dir_node->ump; 2163 int refcnt, error; 2164 2165 DPRINTF(NOTIMPL, ("udf_rmdir called\n")); 2166 2167 /* don't allow '.' to be deleted */ 2168 if (dir_node == udf_node) { 2169 vrele(dvp); 2170 vput(vp); 2171 return EINVAL; 2172 } 2173 2174 /* check to see if the directory is empty */ 2175 error = 0; 2176 if (dir_node->fe) { 2177 refcnt = udf_rw16(udf_node->fe->link_cnt); 2178 } else { 2179 refcnt = udf_rw16(udf_node->efe->link_cnt); 2180 } 2181 if (refcnt > 1) { 2182 /* NOT empty */ 2183 vput(dvp); 2184 vput(vp); 2185 return ENOTEMPTY; 2186 } 2187 2188 /* detach the node from the directory */ 2189 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 2190 if (error == 0) { 2191 cache_purge(vp); 2192// cache_purge(dvp); /* XXX from msdosfs, why? */ 2193 VN_KNOTE(vp, NOTE_DELETE); 2194 } 2195 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 2196 2197 /* unput the nodes and exit */ 2198 vput(dvp); 2199 vput(vp); 2200 2201 return error; 2202} 2203 2204/* --------------------------------------------------------------------- */ 2205 2206int 2207udf_fsync(void *v) 2208{ 2209 struct vop_fsync_args /* { 2210 struct vnode *a_vp; 2211 kauth_cred_t a_cred; 2212 int a_flags; 2213 off_t offlo; 2214 off_t offhi; 2215 struct proc *a_p; 2216 } */ *ap = v; 2217 struct vnode *vp = ap->a_vp; 2218 struct udf_node *udf_node = VTOI(vp); 2219 int error, flags, wait; 2220 2221 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2222 udf_node, 2223 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2224 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2225 2226 /* flush data and wait for it when requested */ 2227 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2228 error = vflushbuf(vp, ap->a_flags); 2229 if (error) 2230 return error; 2231 2232 if (udf_node == NULL) { 2233 printf("udf_fsync() called on NULL udf_node!\n"); 2234 return 0; 2235 } 2236 if (vp->v_tag != VT_UDF) { 2237 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2238 return 0; 2239 } 2240 2241 /* set our times */ 2242 udf_itimes(udf_node, NULL, NULL, NULL); 2243 2244 /* if called when mounted readonly, never write back */ 2245 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2246 return 0; 2247 2248 /* if only data is requested, return */ 2249 if (ap->a_flags & FSYNC_DATAONLY) 2250 return 0; 2251 2252 /* check if the node is dirty 'enough'*/ 2253 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2254 if (flags == 0) 2255 return 0; 2256 2257 /* if we don't have to wait, check for IO pending */ 2258 if (!wait) { 2259 if (vp->v_numoutput > 0) { 2260 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2261 return 0; 2262 } 2263 if (udf_node->outstanding_bufs > 0) { 2264 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2265 return 0; 2266 } 2267 if (udf_node->outstanding_nodedscr > 0) { 2268 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2269 return 0; 2270 } 2271 } 2272 2273 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2274 if (wait) { 2275 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2276 mutex_enter(vp->v_interlock); 2277 while (vp->v_numoutput) { 2278 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2279 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2280 } 2281 mutex_exit(vp->v_interlock); 2282 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2283 } 2284 2285 /* write out node and wait for it if requested */ 2286 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2287 error = udf_writeout_node(udf_node, wait); 2288 if (error) 2289 return error; 2290 2291 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2292 2293 return 0; 2294} 2295 2296/* --------------------------------------------------------------------- */ 2297 2298int 2299udf_advlock(void *v) 2300{ 2301 struct vop_advlock_args /* { 2302 struct vnode *a_vp; 2303 void *a_id; 2304 int a_op; 2305 struct flock *a_fl; 2306 int a_flags; 2307 } */ *ap = v; 2308 struct vnode *vp = ap->a_vp; 2309 struct udf_node *udf_node = VTOI(vp); 2310 struct file_entry *fe; 2311 struct extfile_entry *efe; 2312 uint64_t file_size; 2313 2314 DPRINTF(LOCKING, ("udf_advlock called\n")); 2315 2316 /* get directory filesize */ 2317 if (udf_node->fe) { 2318 fe = udf_node->fe; 2319 file_size = udf_rw64(fe->inf_len); 2320 } else { 2321 assert(udf_node->efe); 2322 efe = udf_node->efe; 2323 file_size = udf_rw64(efe->inf_len); 2324 } 2325 2326 return lf_advlock(ap, &udf_node->lockf, file_size); 2327} 2328 2329/* --------------------------------------------------------------------- */ 2330 2331/* Global vfs vnode data structures for udfs */ 2332int (**udf_vnodeop_p)(void *); 2333 2334const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2335 { &vop_default_desc, vn_default_error }, 2336 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2337 { &vop_create_desc, udf_create }, /* create */ 2338 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2339 { &vop_open_desc, udf_open }, /* open */ 2340 { &vop_close_desc, udf_close }, /* close */ 2341 { &vop_access_desc, udf_access }, /* access */ 2342 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2343 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2344 { &vop_read_desc, udf_read }, /* read */ 2345 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2346 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2347 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2348 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2349 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2350 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2351 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2352 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2353 { &vop_seek_desc, genfs_seek }, /* seek */ 2354 { &vop_remove_desc, udf_remove }, /* remove */ 2355 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2356 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2357 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2358 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2359 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2360 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2361 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2362 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2363 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2364 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2365 { &vop_lock_desc, genfs_lock }, /* lock */ 2366 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2367 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2368 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2369/* { &vop_print_desc, udf_print }, */ /* print */ 2370 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2371 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2372 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2373 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2374 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2375 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2376 { NULL, NULL } 2377}; 2378 2379 2380const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2381 &udf_vnodeop_p, udf_vnodeop_entries 2382}; 2383