udf_vnops.c revision 1.93
1 /* $NetBSD: udf_vnops.c,v 1.93 2014/07/29 11:10:12 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 1.93 2014/07/29 11:10:12 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 <sys/dirhash.h> 62 63 #include "udf.h" 64 #include "udf_subr.h" 65 #include "udf_bswap.h" 66 67 68 #define VTOI(vnode) ((struct udf_node *) (vnode)->v_data) 69 70 71 /* externs */ 72 extern int prtactive; 73 74 /* implementations of vnode functions; table follows at end */ 75 /* --------------------------------------------------------------------- */ 76 77 int 78 udf_inactive(void *v) 79 { 80 struct vop_inactive_args /* { 81 struct vnode *a_vp; 82 bool *a_recycle; 83 } */ *ap = v; 84 struct vnode *vp = ap->a_vp; 85 struct udf_node *udf_node = VTOI(vp); 86 int refcnt; 87 88 DPRINTF(NODE, ("udf_inactive called for udf_node %p\n", VTOI(vp))); 89 90 if (udf_node == NULL) { 91 DPRINTF(NODE, ("udf_inactive: inactive NULL UDF node\n")); 92 VOP_UNLOCK(vp); 93 return 0; 94 } 95 96 /* 97 * Optionally flush metadata to disc. If the file has not been 98 * referenced anymore in a directory we ought to free up the resources 99 * on disc if applicable. 100 */ 101 if (udf_node->fe) { 102 refcnt = udf_rw16(udf_node->fe->link_cnt); 103 } else { 104 assert(udf_node->efe); 105 refcnt = udf_rw16(udf_node->efe->link_cnt); 106 } 107 108 if ((refcnt == 0) && (vp->v_vflag & VV_SYSTEM)) { 109 DPRINTF(VOLUMES, ("UDF_INACTIVE deleting VV_SYSTEM\n")); 110 /* system nodes are not writen out on inactive, so flush */ 111 udf_node->i_flags = 0; 112 } 113 114 *ap->a_recycle = false; 115 if ((refcnt == 0) && ((vp->v_vflag & VV_SYSTEM) == 0)) { 116 /* remove this file's allocation */ 117 DPRINTF(NODE, ("udf_inactive deleting unlinked file\n")); 118 *ap->a_recycle = true; 119 udf_delete_node(udf_node); 120 VOP_UNLOCK(vp); 121 return 0; 122 } 123 124 /* write out its node */ 125 if (udf_node->i_flags & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) 126 udf_update(vp, NULL, NULL, NULL, 0); 127 VOP_UNLOCK(vp); 128 129 return 0; 130 } 131 132 /* --------------------------------------------------------------------- */ 133 134 int udf_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *lwp); 135 136 int 137 udf_reclaim(void *v) 138 { 139 struct vop_reclaim_args /* { 140 struct vnode *a_vp; 141 } */ *ap = v; 142 struct vnode *vp = ap->a_vp; 143 struct udf_node *udf_node = VTOI(vp); 144 145 DPRINTF(NODE, ("udf_reclaim called for node %p\n", udf_node)); 146 if (prtactive && vp->v_usecount > 1) 147 vprint("udf_reclaim(): pushing active", vp); 148 149 if (udf_node == NULL) { 150 DPRINTF(NODE, ("udf_reclaim(): null udfnode\n")); 151 return 0; 152 } 153 154 /* update note for closure */ 155 udf_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 156 157 /* async check to see if all node descriptors are written out */ 158 while ((volatile int) udf_node->outstanding_nodedscr > 0) { 159 vprint("udf_reclaim(): waiting for writeout\n", vp); 160 tsleep(&udf_node->outstanding_nodedscr, PRIBIO, "recl wait", hz/8); 161 } 162 163 /* dispose all node knowledge */ 164 udf_dispose_node(udf_node); 165 166 return 0; 167 } 168 169 /* --------------------------------------------------------------------- */ 170 171 int 172 udf_read(void *v) 173 { 174 struct vop_read_args /* { 175 struct vnode *a_vp; 176 struct uio *a_uio; 177 int a_ioflag; 178 kauth_cred_t a_cred; 179 } */ *ap = v; 180 struct vnode *vp = ap->a_vp; 181 struct uio *uio = ap->a_uio; 182 int ioflag = ap->a_ioflag; 183 int advice = IO_ADV_DECODE(ap->a_ioflag); 184 struct uvm_object *uobj; 185 struct udf_node *udf_node = VTOI(vp); 186 struct file_entry *fe; 187 struct extfile_entry *efe; 188 uint64_t file_size; 189 vsize_t len; 190 int error; 191 192 /* 193 * XXX reading from extended attributes not yet implemented. FreeBSD 194 * has it in mind to forward the IO_EXT read call to the 195 * VOP_READEXTATTR(). 196 */ 197 198 DPRINTF(READ, ("udf_read called\n")); 199 200 /* can this happen? some filingsystems have this check */ 201 if (uio->uio_offset < 0) 202 return EINVAL; 203 if (uio->uio_resid == 0) 204 return 0; 205 206 /* protect against rogue programs reading raw directories and links */ 207 if ((ioflag & IO_ALTSEMANTICS) == 0) { 208 if (vp->v_type == VDIR) 209 return EISDIR; 210 /* all but regular files just give EINVAL */ 211 if (vp->v_type != VREG) 212 return EINVAL; 213 } 214 215 assert(udf_node); 216 assert(udf_node->fe || udf_node->efe); 217 218 /* get file/directory filesize */ 219 if (udf_node->fe) { 220 fe = udf_node->fe; 221 file_size = udf_rw64(fe->inf_len); 222 } else { 223 assert(udf_node->efe); 224 efe = udf_node->efe; 225 file_size = udf_rw64(efe->inf_len); 226 } 227 228 /* read contents using buffercache */ 229 uobj = &vp->v_uobj; 230 error = 0; 231 while (uio->uio_resid > 0) { 232 /* reached end? */ 233 if (file_size <= uio->uio_offset) 234 break; 235 236 /* maximise length to file extremity */ 237 len = MIN(file_size - uio->uio_offset, uio->uio_resid); 238 if (len == 0) 239 break; 240 241 /* ubc, here we come, prepare to trap */ 242 error = ubc_uiomove(uobj, uio, len, advice, 243 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 244 if (error) 245 break; 246 } 247 248 /* note access time unless not requested */ 249 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) { 250 udf_node->i_flags |= IN_ACCESS; 251 if ((ioflag & IO_SYNC) == IO_SYNC) 252 error = udf_update(vp, NULL, NULL, NULL, UPDATE_WAIT); 253 } 254 255 return error; 256 } 257 258 /* --------------------------------------------------------------------- */ 259 260 int 261 udf_write(void *v) 262 { 263 struct vop_write_args /* { 264 struct vnode *a_vp; 265 struct uio *a_uio; 266 int a_ioflag; 267 kauth_cred_t a_cred; 268 } */ *ap = v; 269 struct vnode *vp = ap->a_vp; 270 struct uio *uio = ap->a_uio; 271 int ioflag = ap->a_ioflag; 272 kauth_cred_t cred = ap->a_cred; 273 int advice = IO_ADV_DECODE(ap->a_ioflag); 274 struct uvm_object *uobj; 275 struct udf_node *udf_node = VTOI(vp); 276 struct file_entry *fe; 277 struct extfile_entry *efe; 278 uint64_t file_size, old_size, old_offset; 279 vsize_t len; 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 ((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 */ 417 418 int 419 udf_trivial_bmap(void *v) 420 { 421 struct vop_bmap_args /* { 422 struct vnode *a_vp; 423 daddr_t a_bn; 424 struct vnode **a_vpp; 425 daddr_t *a_bnp; 426 int *a_runp; 427 } */ *ap = v; 428 struct vnode *vp = ap->a_vp; /* our node */ 429 struct vnode **vpp = ap->a_vpp; /* return node */ 430 daddr_t *bnp = ap->a_bnp; /* translated */ 431 daddr_t bn = ap->a_bn; /* origional */ 432 int *runp = ap->a_runp; 433 struct udf_node *udf_node = VTOI(vp); 434 uint32_t lb_size; 435 436 /* get logical block size */ 437 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 438 439 /* could return `-1' to indicate holes/zeros */ 440 /* translate 1:1 */ 441 *bnp = bn; 442 443 /* set the vnode to read the data from with strategy on itself */ 444 if (vpp) 445 *vpp = vp; 446 447 /* set runlength of maximum block size */ 448 if (runp) 449 *runp = MAXPHYS / lb_size; /* or with -1 ? */ 450 451 /* return success */ 452 return 0; 453 } 454 455 /* --------------------------------------------------------------------- */ 456 457 int 458 udf_vfsstrategy(void *v) 459 { 460 struct vop_strategy_args /* { 461 struct vnode *a_vp; 462 struct buf *a_bp; 463 } */ *ap = v; 464 struct vnode *vp = ap->a_vp; 465 struct buf *bp = ap->a_bp; 466 struct udf_node *udf_node = VTOI(vp); 467 uint32_t lb_size, sectors; 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 length to fetch/store in sectors */ 482 sectors = bp->b_bcount / lb_size; 483 assert(bp->b_bcount > 0); 484 485 /* NEVER assume later that this buffer is already translated */ 486 /* bp->b_lblkno = bp->b_blkno; */ 487 488 /* check assertions: we OUGHT to always get multiples of this */ 489 assert(sectors * lb_size == bp->b_bcount); 490 __USE(sectors); 491 492 /* issue buffer */ 493 if (bp->b_flags & B_READ) { 494 DPRINTF(STRATEGY, ("\tread vp %p buf %p (blk no %"PRIu64")" 495 ", for %d sectors\n", 496 vp, bp, bp->b_blkno, sectors)); 497 498 /* read buffer from the udf_node, translate vtop on the way*/ 499 udf_read_filebuf(udf_node, bp); 500 } else { 501 DPRINTF(STRATEGY, ("\twrite vp %p buf %p (blk no %"PRIu64")" 502 ", for %d sectors\n", 503 vp, bp, bp->b_blkno, sectors)); 504 505 /* write buffer to the udf_node, translate vtop on the way*/ 506 udf_write_filebuf(udf_node, bp); 507 } 508 509 return bp->b_error; 510 } 511 512 /* --------------------------------------------------------------------- */ 513 514 int 515 udf_readdir(void *v) 516 { 517 struct vop_readdir_args /* { 518 struct vnode *a_vp; 519 struct uio *a_uio; 520 kauth_cred_t a_cred; 521 int *a_eofflag; 522 off_t **a_cookies; 523 int *a_ncookies; 524 } */ *ap = v; 525 struct uio *uio = ap->a_uio; 526 struct vnode *vp = ap->a_vp; 527 struct udf_node *udf_node = VTOI(vp); 528 struct file_entry *fe; 529 struct extfile_entry *efe; 530 struct fileid_desc *fid; 531 struct dirent *dirent; 532 uint64_t file_size, diroffset, transoffset; 533 uint32_t lb_size; 534 int error; 535 536 DPRINTF(READDIR, ("udf_readdir called\n")); 537 538 /* This operation only makes sense on directory nodes. */ 539 if (vp->v_type != VDIR) 540 return ENOTDIR; 541 542 /* get directory filesize */ 543 if (udf_node->fe) { 544 fe = udf_node->fe; 545 file_size = udf_rw64(fe->inf_len); 546 } else { 547 assert(udf_node->efe); 548 efe = udf_node->efe; 549 file_size = udf_rw64(efe->inf_len); 550 } 551 552 dirent = malloc(sizeof(struct dirent), M_UDFTEMP, M_WAITOK | M_ZERO); 553 554 /* 555 * Add `.' pseudo entry if at offset zero since its not in the fid 556 * stream 557 */ 558 if (uio->uio_offset == 0) { 559 DPRINTF(READDIR, ("\t'.' inserted\n")); 560 strcpy(dirent->d_name, "."); 561 dirent->d_fileno = udf_get_node_id(&udf_node->loc); 562 dirent->d_type = DT_DIR; 563 dirent->d_namlen = strlen(dirent->d_name); 564 dirent->d_reclen = _DIRENT_SIZE(dirent); 565 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 566 567 /* mark with magic value that we have done the dummy */ 568 uio->uio_offset = UDF_DIRCOOKIE_DOT; 569 } 570 571 /* we are called just as long as we keep on pushing data in */ 572 error = 0; 573 if (uio->uio_offset < file_size) { 574 /* allocate temporary space for fid */ 575 lb_size = udf_rw32(udf_node->ump->logical_vol->lb_size); 576 fid = malloc(lb_size, M_UDFTEMP, M_WAITOK); 577 578 if (uio->uio_offset == UDF_DIRCOOKIE_DOT) 579 uio->uio_offset = 0; 580 581 diroffset = uio->uio_offset; 582 transoffset = diroffset; 583 while (diroffset < file_size) { 584 DPRINTF(READDIR, ("\tread in fid stream\n")); 585 /* transfer a new fid/dirent */ 586 error = udf_read_fid_stream(vp, &diroffset, fid, dirent); 587 DPRINTFIF(READDIR, error, ("read error in read fid " 588 "stream : %d\n", error)); 589 if (error) 590 break; 591 592 /* 593 * If there isn't enough space in the uio to return a 594 * whole dirent, break off read 595 */ 596 if (uio->uio_resid < _DIRENT_SIZE(dirent)) 597 break; 598 599 /* remember the last entry we transfered */ 600 transoffset = diroffset; 601 602 /* skip deleted entries */ 603 if (fid->file_char & UDF_FILE_CHAR_DEL) 604 continue; 605 606 /* skip not visible files */ 607 if (fid->file_char & UDF_FILE_CHAR_VIS) 608 continue; 609 610 /* copy dirent to the caller */ 611 DPRINTF(READDIR, ("\tread dirent `%s', type %d\n", 612 dirent->d_name, dirent->d_type)); 613 uiomove(dirent, _DIRENT_SIZE(dirent), uio); 614 } 615 616 /* pass on last transfered offset */ 617 uio->uio_offset = transoffset; 618 free(fid, M_UDFTEMP); 619 } 620 621 if (ap->a_eofflag) 622 *ap->a_eofflag = (uio->uio_offset >= file_size); 623 624 #ifdef DEBUG 625 if (udf_verbose & UDF_DEBUG_READDIR) { 626 printf("returning offset %d\n", (uint32_t) uio->uio_offset); 627 if (ap->a_eofflag) 628 printf("returning EOF ? %d\n", *ap->a_eofflag); 629 if (error) 630 printf("readdir returning error %d\n", error); 631 } 632 #endif 633 634 free(dirent, M_UDFTEMP); 635 return error; 636 } 637 638 /* --------------------------------------------------------------------- */ 639 640 int 641 udf_lookup(void *v) 642 { 643 struct vop_lookup_v2_args /* { 644 struct vnode *a_dvp; 645 struct vnode **a_vpp; 646 struct componentname *a_cnp; 647 } */ *ap = v; 648 struct vnode *dvp = ap->a_dvp; 649 struct vnode **vpp = ap->a_vpp; 650 struct componentname *cnp = ap->a_cnp; 651 struct udf_node *dir_node, *res_node; 652 struct udf_mount *ump; 653 struct long_ad icb_loc; 654 mode_t mode; 655 uid_t d_uid; 656 gid_t d_gid; 657 const char *name; 658 int namelen, nameiop, islastcn, mounted_ro; 659 int error, found; 660 661 dir_node = VTOI(dvp); 662 ump = dir_node->ump; 663 *vpp = NULL; 664 665 DPRINTF(LOOKUP, ("udf_lookup called, lookup `%s`\n", 666 cnp->cn_nameptr)); 667 668 /* simplify/clarification flags */ 669 nameiop = cnp->cn_nameiop; 670 islastcn = cnp->cn_flags & ISLASTCN; 671 mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY; 672 673 /* check exec/dirread permissions first */ 674 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); 675 if (error) 676 return error; 677 678 DPRINTF(LOOKUP, ("\taccess ok\n")); 679 680 /* 681 * If requesting a modify on the last path element on a read-only 682 * filingsystem, reject lookup; XXX why is this repeated in every FS ? 683 */ 684 if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME)) 685 return EROFS; 686 687 DPRINTF(LOOKUP, ("\tlooking up cnp->cn_nameptr '%s'\n", 688 cnp->cn_nameptr)); 689 /* look in the namecache */ 690 if (cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 691 cnp->cn_nameiop, cnp->cn_flags, NULL, vpp)) { 692 return *vpp == NULLVP ? ENOENT : 0; 693 } 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 if (islastcn && cnp->cn_nameiop == RENAME) { 708 error = EISDIR; 709 goto out; 710 } 711 vref(dvp); 712 *vpp = dvp; 713 /* done */ 714 goto done; 715 } else if (cnp->cn_flags & ISDOTDOT) { 716 /* special case 2 '..' */ 717 DPRINTF(LOOKUP, ("\tlookup '..'\n")); 718 719 if (islastcn && cnp->cn_nameiop == RENAME) { 720 error = EINVAL; 721 goto out; 722 } 723 724 /* get our node */ 725 name = ".."; 726 namelen = 2; 727 error = udf_lookup_name_in_dir(dvp, name, namelen, 728 &icb_loc, &found); 729 if (error) 730 goto out; 731 if (!found) 732 error = ENOENT; 733 734 /* first unlock parent */ 735 VOP_UNLOCK(dvp); 736 737 if (error == 0) { 738 DPRINTF(LOOKUP, ("\tfound '..'\n")); 739 /* try to create/reuse the node */ 740 error = udf_get_node(ump, &icb_loc, &res_node); 741 742 if (!error) { 743 DPRINTF(LOOKUP, 744 ("\tnode retrieved/created OK\n")); 745 *vpp = res_node->vnode; 746 } 747 } 748 749 /* try to relock parent */ 750 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 751 goto out; 752 } 753 754 /* all other files */ 755 DPRINTF(LOOKUP, ("\tlookup file/dir in directory\n")); 756 757 /* lookup filename in the directory; location icb_loc */ 758 name = cnp->cn_nameptr; 759 namelen = cnp->cn_namelen; 760 error = udf_lookup_name_in_dir(dvp, name, namelen, 761 &icb_loc, &found); 762 if (error) 763 goto out; 764 if (!found) { 765 DPRINTF(LOOKUP, ("\tNOT found\n")); 766 /* 767 * The entry was not found in the directory. This is 768 * valid if we are creating or renaming an entry and 769 * are working on the last component of the path name. 770 */ 771 if (islastcn && (cnp->cn_nameiop == CREATE || 772 cnp->cn_nameiop == RENAME)) { 773 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 774 if (error) { 775 goto out; 776 } 777 error = EJUSTRETURN; 778 } else { 779 error = ENOENT; 780 } 781 /* done */ 782 goto done; 783 } 784 785 /* 786 * XXX NOTE tmpfs has a test here that tests that intermediate 787 * components i.e. not the last one ought to be either a directory or 788 * a link. It seems to function well without this code. 789 */ 790 791 /* try to create/reuse the node */ 792 error = udf_get_node(ump, &icb_loc, &res_node); 793 if (error) 794 goto out; 795 796 /* check permissions */ 797 if (islastcn && (cnp->cn_nameiop == DELETE || 798 cnp->cn_nameiop == RENAME) ) { 799 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred); 800 if (error) { 801 vput(res_node->vnode); 802 goto out; 803 } 804 805 /* 806 * Check if the directory has its sticky bit set. If so, ask 807 * for clearance since only the owner of a file or directory 808 * can remove/rename from taht directory. 809 */ 810 mode = udf_getaccessmode(dir_node); 811 if ((mode & S_ISTXT) != 0) { 812 udf_getownership(dir_node, &d_uid, &d_gid); 813 error = kauth_authorize_vnode(cnp->cn_cred, 814 KAUTH_VNODE_DELETE, res_node->vnode, 815 dir_node->vnode, genfs_can_sticky(cnp->cn_cred, 816 d_uid, d_uid)); 817 if (error) { 818 error = EPERM; 819 vput(res_node->vnode); 820 goto out; 821 } 822 } 823 } 824 825 *vpp = res_node->vnode; 826 827 done: 828 /* 829 * Store result in the cache if requested. If we are creating a file, 830 * the file might not be found and thus putting it into the namecache 831 * might be seen as negative caching. 832 */ 833 if (nameiop != CREATE) 834 cache_enter(dvp, *vpp, cnp->cn_nameptr, cnp->cn_namelen, 835 cnp->cn_flags); 836 837 out: 838 if (error == 0 && *vpp != dvp) 839 VOP_UNLOCK(*vpp); 840 DPRINTFIF(LOOKUP, error, ("udf_lookup returing error %d\n", error)); 841 842 return error; 843 } 844 845 /* --------------------------------------------------------------------- */ 846 847 int 848 udf_getattr(void *v) 849 { 850 struct vop_getattr_args /* { 851 struct vnode *a_vp; 852 struct vattr *a_vap; 853 kauth_cred_t a_cred; 854 struct lwp *a_l; 855 } */ *ap = v; 856 struct vnode *vp = ap->a_vp; 857 struct udf_node *udf_node = VTOI(vp); 858 struct udf_mount *ump = udf_node->ump; 859 struct file_entry *fe = udf_node->fe; 860 struct extfile_entry *efe = udf_node->efe; 861 struct filetimes_extattr_entry *ft_extattr; 862 struct device_extattr_entry *devattr; 863 struct vattr *vap = ap->a_vap; 864 struct timestamp *atime, *mtime, *attrtime, *creatime; 865 uint64_t filesize, blkssize; 866 uint32_t nlink; 867 uint32_t offset, a_l; 868 uint8_t *filedata; 869 uid_t uid; 870 gid_t gid; 871 int error; 872 873 DPRINTF(CALL, ("udf_getattr called\n")); 874 875 /* update times before we returning values */ 876 udf_itimes(udf_node, NULL, NULL, NULL); 877 878 /* get descriptor information */ 879 if (fe) { 880 nlink = udf_rw16(fe->link_cnt); 881 uid = (uid_t)udf_rw32(fe->uid); 882 gid = (gid_t)udf_rw32(fe->gid); 883 filesize = udf_rw64(fe->inf_len); 884 blkssize = udf_rw64(fe->logblks_rec); 885 atime = &fe->atime; 886 mtime = &fe->mtime; 887 attrtime = &fe->attrtime; 888 filedata = fe->data; 889 890 /* initial guess */ 891 creatime = mtime; 892 893 /* check our extended attribute if present */ 894 error = udf_extattr_search_intern(udf_node, 895 UDF_FILETIMES_ATTR_NO, "", &offset, &a_l); 896 if (!error) { 897 ft_extattr = (struct filetimes_extattr_entry *) 898 (filedata + offset); 899 if (ft_extattr->existence & UDF_FILETIMES_FILE_CREATION) 900 creatime = &ft_extattr->times[0]; 901 } 902 } else { 903 assert(udf_node->efe); 904 nlink = udf_rw16(efe->link_cnt); 905 uid = (uid_t)udf_rw32(efe->uid); 906 gid = (gid_t)udf_rw32(efe->gid); 907 filesize = udf_rw64(efe->inf_len); /* XXX or obj_size? */ 908 blkssize = udf_rw64(efe->logblks_rec); 909 atime = &efe->atime; 910 mtime = &efe->mtime; 911 attrtime = &efe->attrtime; 912 creatime = &efe->ctime; 913 filedata = efe->data; 914 } 915 916 /* do the uid/gid translation game */ 917 if (uid == (uid_t) -1) 918 uid = ump->mount_args.anon_uid; 919 if (gid == (gid_t) -1) 920 gid = ump->mount_args.anon_gid; 921 922 /* fill in struct vattr with values from the node */ 923 vattr_null(vap); 924 vap->va_type = vp->v_type; 925 vap->va_mode = udf_getaccessmode(udf_node); 926 vap->va_nlink = nlink; 927 vap->va_uid = uid; 928 vap->va_gid = gid; 929 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 930 vap->va_fileid = udf_get_node_id(&udf_node->loc); /* inode hash XXX */ 931 vap->va_size = filesize; 932 vap->va_blocksize = udf_node->ump->discinfo.sector_size; /* wise? */ 933 934 /* 935 * BUG-ALERT: UDF doesn't count '.' as an entry, so we'll have to add 936 * 1 to the link count if its a directory we're requested attributes 937 * of. 938 */ 939 if (vap->va_type == VDIR) 940 vap->va_nlink++; 941 942 /* access times */ 943 udf_timestamp_to_timespec(ump, atime, &vap->va_atime); 944 udf_timestamp_to_timespec(ump, mtime, &vap->va_mtime); 945 udf_timestamp_to_timespec(ump, attrtime, &vap->va_ctime); 946 udf_timestamp_to_timespec(ump, creatime, &vap->va_birthtime); 947 948 vap->va_gen = 1; /* no multiple generations yes (!?) */ 949 vap->va_flags = 0; /* no flags */ 950 vap->va_bytes = blkssize * udf_node->ump->discinfo.sector_size; 951 vap->va_filerev = 1; /* TODO file revision numbers? */ 952 vap->va_vaflags = 0; 953 /* TODO get vaflags from the extended attributes? */ 954 955 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) { 956 error = udf_extattr_search_intern(udf_node, 957 UDF_DEVICESPEC_ATTR_NO, "", 958 &offset, &a_l); 959 /* if error, deny access */ 960 if (error || (filedata == NULL)) { 961 vap->va_mode = 0; /* or v_type = VNON? */ 962 } else { 963 devattr = (struct device_extattr_entry *) 964 filedata + offset; 965 vap->va_rdev = makedev( 966 udf_rw32(devattr->major), 967 udf_rw32(devattr->minor) 968 ); 969 /* TODO we could check the implementator */ 970 } 971 } 972 973 return 0; 974 } 975 976 /* --------------------------------------------------------------------- */ 977 978 static int 979 udf_chown(struct vnode *vp, uid_t new_uid, gid_t new_gid, 980 kauth_cred_t cred) 981 { 982 struct udf_node *udf_node = VTOI(vp); 983 uid_t uid; 984 gid_t gid; 985 int error; 986 987 #ifdef notyet 988 /* TODO get vaflags from the extended attributes? */ 989 /* Immutable or append-only files cannot be modified, either. */ 990 if (udf_node->flags & (IMMUTABLE | APPEND)) 991 return EPERM; 992 #endif 993 994 if (vp->v_mount->mnt_flag & MNT_RDONLY) 995 return EROFS; 996 997 /* retrieve old values */ 998 udf_getownership(udf_node, &uid, &gid); 999 1000 /* only one could be specified */ 1001 if (new_uid == VNOVAL) 1002 new_uid = uid; 1003 if (new_gid == VNOVAL) 1004 new_gid = gid; 1005 1006 /* check if we can fit it in an 32 bits */ 1007 if ((uid_t) ((uint32_t) new_uid) != new_uid) 1008 return EINVAL; 1009 if ((gid_t) ((uint32_t) new_gid) != new_gid) 1010 return EINVAL; 1011 1012 /* check permissions */ 1013 error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, 1014 vp, NULL, genfs_can_chown(cred, uid, gid, new_uid, new_gid)); 1015 if (error) 1016 return (error); 1017 1018 /* change the ownership */ 1019 udf_setownership(udf_node, new_uid, new_gid); 1020 1021 /* mark node changed */ 1022 udf_node->i_flags |= IN_CHANGE; 1023 1024 return 0; 1025 } 1026 1027 1028 static int 1029 udf_chmod(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1030 { 1031 struct udf_node *udf_node = VTOI(vp); 1032 uid_t uid; 1033 gid_t gid; 1034 int error; 1035 1036 #ifdef notyet 1037 /* TODO get vaflags from the extended attributes? */ 1038 /* Immutable or append-only files cannot be modified, either. */ 1039 if (udf_node->flags & (IMMUTABLE | APPEND)) 1040 return EPERM; 1041 #endif 1042 1043 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1044 return EROFS; 1045 1046 /* retrieve uid/gid values */ 1047 udf_getownership(udf_node, &uid, &gid); 1048 1049 /* check permissions */ 1050 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, 1051 NULL, genfs_can_chmod(vp->v_type, cred, uid, gid, mode)); 1052 if (error) 1053 return (error); 1054 1055 /* change mode */ 1056 udf_setaccessmode(udf_node, mode); 1057 1058 /* mark node changed */ 1059 udf_node->i_flags |= IN_CHANGE; 1060 1061 return 0; 1062 } 1063 1064 1065 /* exported */ 1066 int 1067 udf_chsize(struct vnode *vp, u_quad_t newsize, kauth_cred_t cred) 1068 { 1069 struct udf_node *udf_node = VTOI(vp); 1070 int error, extended; 1071 1072 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1073 return EROFS; 1074 1075 /* Decide whether this is a valid operation based on the file type. */ 1076 switch (vp->v_type) { 1077 case VDIR: 1078 return EISDIR; 1079 case VREG: 1080 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1081 return EROFS; 1082 break; 1083 case VBLK: 1084 /* FALLTHROUGH */ 1085 case VCHR: 1086 /* FALLTHROUGH */ 1087 case VFIFO: 1088 /* Allow modifications of special files even if in the file 1089 * system is mounted read-only (we are not modifying the 1090 * files themselves, but the objects they represent). */ 1091 return 0; 1092 default: 1093 /* Anything else is unsupported. */ 1094 return EOPNOTSUPP; 1095 } 1096 1097 #if notyet 1098 /* TODO get vaflags from the extended attributes? */ 1099 /* Immutable or append-only files cannot be modified, either. */ 1100 if (node->flags & (IMMUTABLE | APPEND)) 1101 return EPERM; 1102 #endif 1103 1104 /* resize file to the requested size */ 1105 error = udf_resize_node(udf_node, newsize, &extended); 1106 1107 if (error == 0) { 1108 /* mark change */ 1109 udf_node->i_flags |= IN_CHANGE | IN_MODIFY; 1110 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1111 udf_node->i_flags |= IN_ACCESS; 1112 VN_KNOTE(vp, NOTE_ATTRIB | (extended ? NOTE_EXTEND : 0)); 1113 udf_update(vp, NULL, NULL, NULL, 0); 1114 } 1115 1116 return error; 1117 } 1118 1119 1120 static int 1121 udf_chflags(struct vnode *vp, mode_t mode, kauth_cred_t cred) 1122 { 1123 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1124 return EROFS; 1125 1126 /* 1127 * XXX we can't do this yet, as its not described in the standard yet 1128 */ 1129 1130 return EOPNOTSUPP; 1131 } 1132 1133 1134 static int 1135 udf_chtimes(struct vnode *vp, 1136 struct timespec *atime, struct timespec *mtime, 1137 struct timespec *birthtime, int setattrflags, 1138 kauth_cred_t cred) 1139 { 1140 struct udf_node *udf_node = VTOI(vp); 1141 uid_t uid; 1142 gid_t gid; 1143 int error; 1144 1145 #ifdef notyet 1146 /* TODO get vaflags from the extended attributes? */ 1147 /* Immutable or append-only files cannot be modified, either. */ 1148 if (udf_node->flags & (IMMUTABLE | APPEND)) 1149 return EPERM; 1150 #endif 1151 1152 if (vp->v_mount->mnt_flag & MNT_RDONLY) 1153 return EROFS; 1154 1155 /* retrieve uid/gid values */ 1156 udf_getownership(udf_node, &uid, &gid); 1157 1158 /* check permissions */ 1159 error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, 1160 NULL, genfs_can_chtimes(vp, setattrflags, uid, cred)); 1161 if (error) 1162 return (error); 1163 1164 /* update node flags depending on what times are passed */ 1165 if (atime->tv_sec != VNOVAL) 1166 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 1167 udf_node->i_flags |= IN_ACCESS; 1168 if ((mtime->tv_sec != VNOVAL) || (birthtime->tv_sec != VNOVAL)) { 1169 udf_node->i_flags |= IN_CHANGE | IN_UPDATE; 1170 if (vp->v_mount->mnt_flag & MNT_RELATIME) 1171 udf_node->i_flags |= IN_ACCESS; 1172 } 1173 1174 return udf_update(vp, atime, mtime, birthtime, 0); 1175 } 1176 1177 1178 int 1179 udf_setattr(void *v) 1180 { 1181 struct vop_setattr_args /* { 1182 struct vnode *a_vp; 1183 struct vattr *a_vap; 1184 kauth_cred_t a_cred; 1185 struct lwp *a_l; 1186 } */ *ap = v; 1187 struct vnode *vp = ap->a_vp; 1188 /* struct udf_node *udf_node = VTOI(vp); */ 1189 /* struct udf_mount *ump = udf_node->ump; */ 1190 kauth_cred_t cred = ap->a_cred; 1191 struct vattr *vap = ap->a_vap; 1192 int error; 1193 1194 DPRINTF(CALL, ("udf_setattr called\n")); 1195 1196 /* Abort if any unsettable attribute is given. */ 1197 error = 0; 1198 if (vap->va_type != VNON || 1199 vap->va_nlink != VNOVAL || 1200 vap->va_fsid != VNOVAL || 1201 vap->va_fileid != VNOVAL || 1202 vap->va_blocksize != VNOVAL || 1203 #ifdef notyet 1204 /* checks are debated */ 1205 vap->va_ctime.tv_sec != VNOVAL || 1206 vap->va_ctime.tv_nsec != VNOVAL || 1207 vap->va_birthtime.tv_sec != VNOVAL || 1208 vap->va_birthtime.tv_nsec != VNOVAL || 1209 #endif 1210 vap->va_gen != VNOVAL || 1211 vap->va_rdev != VNOVAL || 1212 vap->va_bytes != VNOVAL) 1213 error = EINVAL; 1214 1215 DPRINTF(ATTR, ("setattr changing:\n")); 1216 if (error == 0 && (vap->va_flags != VNOVAL)) { 1217 DPRINTF(ATTR, ("\tchflags\n")); 1218 error = udf_chflags(vp, vap->va_flags, cred); 1219 } 1220 1221 if (error == 0 && (vap->va_size != VNOVAL)) { 1222 DPRINTF(ATTR, ("\tchsize\n")); 1223 error = udf_chsize(vp, vap->va_size, cred); 1224 } 1225 1226 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) { 1227 DPRINTF(ATTR, ("\tchown\n")); 1228 error = udf_chown(vp, vap->va_uid, vap->va_gid, cred); 1229 } 1230 1231 if (error == 0 && (vap->va_mode != VNOVAL)) { 1232 DPRINTF(ATTR, ("\tchmod\n")); 1233 error = udf_chmod(vp, vap->va_mode, cred); 1234 } 1235 1236 if (error == 0 && 1237 ((vap->va_atime.tv_sec != VNOVAL && 1238 vap->va_atime.tv_nsec != VNOVAL) || 1239 (vap->va_mtime.tv_sec != VNOVAL && 1240 vap->va_mtime.tv_nsec != VNOVAL)) 1241 ) { 1242 DPRINTF(ATTR, ("\tchtimes\n")); 1243 error = udf_chtimes(vp, &vap->va_atime, &vap->va_mtime, 1244 &vap->va_birthtime, vap->va_vaflags, cred); 1245 } 1246 VN_KNOTE(vp, NOTE_ATTRIB); 1247 1248 return error; 1249 } 1250 1251 /* --------------------------------------------------------------------- */ 1252 1253 /* 1254 * Return POSIX pathconf information for UDF file systems. 1255 */ 1256 int 1257 udf_pathconf(void *v) 1258 { 1259 struct vop_pathconf_args /* { 1260 struct vnode *a_vp; 1261 int a_name; 1262 register_t *a_retval; 1263 } */ *ap = v; 1264 uint32_t bits; 1265 1266 DPRINTF(CALL, ("udf_pathconf called\n")); 1267 1268 switch (ap->a_name) { 1269 case _PC_LINK_MAX: 1270 *ap->a_retval = (1<<16)-1; /* 16 bits */ 1271 return 0; 1272 case _PC_NAME_MAX: 1273 *ap->a_retval = UDF_MAXNAMLEN; 1274 return 0; 1275 case _PC_PATH_MAX: 1276 *ap->a_retval = PATH_MAX; 1277 return 0; 1278 case _PC_PIPE_BUF: 1279 *ap->a_retval = PIPE_BUF; 1280 return 0; 1281 case _PC_CHOWN_RESTRICTED: 1282 *ap->a_retval = 1; 1283 return 0; 1284 case _PC_NO_TRUNC: 1285 *ap->a_retval = 1; 1286 return 0; 1287 case _PC_SYNC_IO: 1288 *ap->a_retval = 0; /* synchronised is off for performance */ 1289 return 0; 1290 case _PC_FILESIZEBITS: 1291 /* 64 bit file offsets -> 2+floor(2log(2^64-1)) = 2 + 63 = 65 */ 1292 bits = 64; /* XXX ought to deliver 65 */ 1293 #if 0 1294 if (udf_node) 1295 bits = 64 * vp->v_mount->mnt_dev_bshift; 1296 #endif 1297 *ap->a_retval = bits; 1298 return 0; 1299 } 1300 1301 return EINVAL; 1302 } 1303 1304 1305 /* --------------------------------------------------------------------- */ 1306 1307 int 1308 udf_open(void *v) 1309 { 1310 struct vop_open_args /* { 1311 struct vnode *a_vp; 1312 int a_mode; 1313 kauth_cred_t a_cred; 1314 struct proc *a_p; 1315 } */ *ap = v; 1316 int flags; 1317 1318 DPRINTF(CALL, ("udf_open called\n")); 1319 1320 /* 1321 * Files marked append-only must be opened for appending. 1322 * TODO: get chflags(2) flags from extened attribute. 1323 */ 1324 flags = 0; 1325 if ((flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 1326 return (EPERM); 1327 1328 return 0; 1329 } 1330 1331 1332 /* --------------------------------------------------------------------- */ 1333 1334 int 1335 udf_close(void *v) 1336 { 1337 struct vop_close_args /* { 1338 struct vnode *a_vp; 1339 int a_fflag; 1340 kauth_cred_t a_cred; 1341 struct proc *a_p; 1342 } */ *ap = v; 1343 struct vnode *vp = ap->a_vp; 1344 struct udf_node *udf_node = VTOI(vp); 1345 int async = vp->v_mount->mnt_flag & MNT_ASYNC; 1346 int error; 1347 1348 DPRINTF(CALL, ("udf_close called\n")); 1349 udf_node = udf_node; /* shut up gcc */ 1350 1351 if (!async && (vp->v_type != VDIR)) { 1352 mutex_enter(vp->v_interlock); 1353 error = VOP_PUTPAGES(vp, 0, 0, PGO_CLEANIT); 1354 if (error) 1355 return error; 1356 } 1357 1358 mutex_enter(vp->v_interlock); 1359 if (vp->v_usecount > 1) 1360 udf_itimes(udf_node, NULL, NULL, NULL); 1361 mutex_exit(vp->v_interlock); 1362 1363 return 0; 1364 } 1365 1366 1367 /* --------------------------------------------------------------------- */ 1368 1369 static int 1370 udf_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode) 1371 { 1372 int flags; 1373 1374 /* check if we are allowed to write */ 1375 switch (vap->va_type) { 1376 case VDIR: 1377 case VLNK: 1378 case VREG: 1379 /* 1380 * normal nodes: check if we're on a read-only mounted 1381 * filingsystem and bomb out if we're trying to write. 1382 */ 1383 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) 1384 return EROFS; 1385 break; 1386 case VBLK: 1387 case VCHR: 1388 case VSOCK: 1389 case VFIFO: 1390 /* 1391 * special nodes: even on read-only mounted filingsystems 1392 * these are allowed to be written to if permissions allow. 1393 */ 1394 break; 1395 default: 1396 /* no idea what this is */ 1397 return EINVAL; 1398 } 1399 1400 /* noone may write immutable files */ 1401 /* TODO: get chflags(2) flags from extened attribute. */ 1402 flags = 0; 1403 if ((mode & VWRITE) && (flags & IMMUTABLE)) 1404 return EPERM; 1405 1406 return 0; 1407 } 1408 1409 static int 1410 udf_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode, 1411 kauth_cred_t cred) 1412 { 1413 /* ask the generic genfs_can_access to advice on security */ 1414 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, 1415 vp->v_type, vap->va_mode), vp, NULL, genfs_can_access(vp->v_type, 1416 vap->va_mode, vap->va_uid, vap->va_gid, mode, cred)); 1417 } 1418 1419 int 1420 udf_access(void *v) 1421 { 1422 struct vop_access_args /* { 1423 struct vnode *a_vp; 1424 int a_mode; 1425 kauth_cred_t a_cred; 1426 struct proc *a_p; 1427 } */ *ap = v; 1428 struct vnode *vp = ap->a_vp; 1429 mode_t mode = ap->a_mode; 1430 kauth_cred_t cred = ap->a_cred; 1431 /* struct udf_node *udf_node = VTOI(vp); */ 1432 struct vattr vap; 1433 int error; 1434 1435 DPRINTF(CALL, ("udf_access called\n")); 1436 1437 error = VOP_GETATTR(vp, &vap, NULL); 1438 if (error) 1439 return error; 1440 1441 error = udf_check_possible(vp, &vap, mode); 1442 if (error) 1443 return error; 1444 1445 error = udf_check_permitted(vp, &vap, mode, cred); 1446 1447 return error; 1448 } 1449 1450 /* --------------------------------------------------------------------- */ 1451 1452 int 1453 udf_create(void *v) 1454 { 1455 struct vop_create_v3_args /* { 1456 struct vnode *a_dvp; 1457 struct vnode **a_vpp; 1458 struct componentname *a_cnp; 1459 struct vattr *a_vap; 1460 } */ *ap = v; 1461 struct vnode *dvp = ap->a_dvp; 1462 struct vnode **vpp = ap->a_vpp; 1463 struct vattr *vap = ap->a_vap; 1464 struct componentname *cnp = ap->a_cnp; 1465 int error; 1466 1467 DPRINTF(CALL, ("udf_create called\n")); 1468 error = udf_create_node(dvp, vpp, vap, cnp); 1469 1470 return error; 1471 } 1472 1473 /* --------------------------------------------------------------------- */ 1474 1475 int 1476 udf_mknod(void *v) 1477 { 1478 struct vop_mknod_v3_args /* { 1479 struct vnode *a_dvp; 1480 struct vnode **a_vpp; 1481 struct componentname *a_cnp; 1482 struct vattr *a_vap; 1483 } */ *ap = v; 1484 struct vnode *dvp = ap->a_dvp; 1485 struct vnode **vpp = ap->a_vpp; 1486 struct vattr *vap = ap->a_vap; 1487 struct componentname *cnp = ap->a_cnp; 1488 int error; 1489 1490 DPRINTF(CALL, ("udf_mknod called\n")); 1491 error = udf_create_node(dvp, vpp, vap, cnp); 1492 1493 return error; 1494 } 1495 1496 /* --------------------------------------------------------------------- */ 1497 1498 int 1499 udf_mkdir(void *v) 1500 { 1501 struct vop_mkdir_v3_args /* { 1502 struct vnode *a_dvp; 1503 struct vnode **a_vpp; 1504 struct componentname *a_cnp; 1505 struct vattr *a_vap; 1506 } */ *ap = v; 1507 struct vnode *dvp = ap->a_dvp; 1508 struct vnode **vpp = ap->a_vpp; 1509 struct vattr *vap = ap->a_vap; 1510 struct componentname *cnp = ap->a_cnp; 1511 int error; 1512 1513 DPRINTF(CALL, ("udf_mkdir called\n")); 1514 error = udf_create_node(dvp, vpp, vap, cnp); 1515 1516 return error; 1517 } 1518 1519 /* --------------------------------------------------------------------- */ 1520 1521 static int 1522 udf_do_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 1523 { 1524 struct udf_node *udf_node, *dir_node; 1525 struct vattr vap; 1526 int error; 1527 1528 DPRINTF(CALL, ("udf_link called\n")); 1529 KASSERT(dvp != vp); 1530 KASSERT(vp->v_type != VDIR); 1531 KASSERT(dvp->v_mount == vp->v_mount); 1532 1533 /* get attributes */ 1534 dir_node = VTOI(dvp); 1535 udf_node = VTOI(vp); 1536 1537 error = VOP_GETATTR(vp, &vap, FSCRED); 1538 if (error) { 1539 VOP_UNLOCK(vp); 1540 return error; 1541 } 1542 1543 /* check link count overflow */ 1544 if (vap.va_nlink >= (1<<16)-1) { /* uint16_t */ 1545 VOP_UNLOCK(vp); 1546 return EMLINK; 1547 } 1548 1549 error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp); 1550 if (error) 1551 VOP_UNLOCK(vp); 1552 return error; 1553 } 1554 1555 int 1556 udf_link(void *v) 1557 { 1558 struct vop_link_args /* { 1559 struct vnode *a_dvp; 1560 struct vnode *a_vp; 1561 struct componentname *a_cnp; 1562 } */ *ap = v; 1563 struct vnode *dvp = ap->a_dvp; 1564 struct vnode *vp = ap->a_vp; 1565 struct componentname *cnp = ap->a_cnp; 1566 int error; 1567 1568 error = udf_do_link(dvp, vp, cnp); 1569 if (error) 1570 VOP_ABORTOP(dvp, cnp); 1571 1572 VN_KNOTE(vp, NOTE_LINK); 1573 VN_KNOTE(dvp, NOTE_WRITE); 1574 vput(dvp); 1575 1576 return error; 1577 } 1578 1579 /* --------------------------------------------------------------------- */ 1580 1581 static int 1582 udf_do_symlink(struct udf_node *udf_node, char *target) 1583 { 1584 struct pathcomp pathcomp; 1585 uint8_t *pathbuf, *pathpos, *compnamepos; 1586 char *mntonname; 1587 int pathlen, len, compnamelen, mntonnamelen; 1588 int error; 1589 1590 /* process `target' to an UDF structure */ 1591 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1592 pathpos = pathbuf; 1593 pathlen = 0; 1594 1595 if (*target == '/') { 1596 /* symlink starts from the root */ 1597 len = UDF_PATH_COMP_SIZE; 1598 memset(&pathcomp, 0, len); 1599 pathcomp.type = UDF_PATH_COMP_ROOT; 1600 1601 /* check if its mount-point relative! */ 1602 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1603 mntonnamelen = strlen(mntonname); 1604 if (strlen(target) >= mntonnamelen) { 1605 if (strncmp(target, mntonname, mntonnamelen) == 0) { 1606 pathcomp.type = UDF_PATH_COMP_MOUNTROOT; 1607 target += mntonnamelen; 1608 } 1609 } else { 1610 target++; 1611 } 1612 1613 memcpy(pathpos, &pathcomp, len); 1614 pathpos += len; 1615 pathlen += len; 1616 } 1617 1618 error = 0; 1619 while (*target) { 1620 /* ignore multiple '/' */ 1621 while (*target == '/') { 1622 target++; 1623 } 1624 if (!*target) 1625 break; 1626 1627 /* extract component name */ 1628 compnamelen = 0; 1629 compnamepos = target; 1630 while ((*target) && (*target != '/')) { 1631 target++; 1632 compnamelen++; 1633 } 1634 1635 /* just trunc if too long ?? (security issue) */ 1636 if (compnamelen >= 127) { 1637 error = ENAMETOOLONG; 1638 break; 1639 } 1640 1641 /* convert unix name to UDF name */ 1642 len = sizeof(struct pathcomp); 1643 memset(&pathcomp, 0, len); 1644 pathcomp.type = UDF_PATH_COMP_NAME; 1645 len = UDF_PATH_COMP_SIZE; 1646 1647 if ((compnamelen == 2) && (strncmp(compnamepos, "..", 2) == 0)) 1648 pathcomp.type = UDF_PATH_COMP_PARENTDIR; 1649 if ((compnamelen == 1) && (*compnamepos == '.')) 1650 pathcomp.type = UDF_PATH_COMP_CURDIR; 1651 1652 if (pathcomp.type == UDF_PATH_COMP_NAME) { 1653 unix_to_udf_name( 1654 (char *) &pathcomp.ident, &pathcomp.l_ci, 1655 compnamepos, compnamelen, 1656 &udf_node->ump->logical_vol->desc_charset); 1657 len = UDF_PATH_COMP_SIZE + pathcomp.l_ci; 1658 } 1659 1660 if (pathlen + len >= UDF_SYMLINKBUFLEN) { 1661 error = ENAMETOOLONG; 1662 break; 1663 } 1664 1665 memcpy(pathpos, &pathcomp, len); 1666 pathpos += len; 1667 pathlen += len; 1668 } 1669 1670 if (error) { 1671 /* aparently too big */ 1672 free(pathbuf, M_UDFTEMP); 1673 return error; 1674 } 1675 1676 error = udf_grow_node(udf_node, pathlen); 1677 if (error) { 1678 /* failed to pregrow node */ 1679 free(pathbuf, M_UDFTEMP); 1680 return error; 1681 } 1682 1683 /* write out structure on the new file */ 1684 error = vn_rdwr(UIO_WRITE, udf_node->vnode, 1685 pathbuf, pathlen, 0, 1686 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1687 FSCRED, NULL, NULL); 1688 1689 /* return status of symlink contents writeout */ 1690 free(pathbuf, M_UDFTEMP); 1691 return error; 1692 } 1693 1694 1695 int 1696 udf_symlink(void *v) 1697 { 1698 struct vop_symlink_v3_args /* { 1699 struct vnode *a_dvp; 1700 struct vnode **a_vpp; 1701 struct componentname *a_cnp; 1702 struct vattr *a_vap; 1703 char *a_target; 1704 } */ *ap = v; 1705 struct vnode *dvp = ap->a_dvp; 1706 struct vnode **vpp = ap->a_vpp; 1707 struct vattr *vap = ap->a_vap; 1708 struct componentname *cnp = ap->a_cnp; 1709 struct udf_node *dir_node; 1710 struct udf_node *udf_node; 1711 int error; 1712 1713 DPRINTF(CALL, ("udf_symlink called\n")); 1714 DPRINTF(CALL, ("\tlinking to `%s`\n", ap->a_target)); 1715 error = udf_create_node(dvp, vpp, vap, cnp); 1716 KASSERT(((error == 0) && (*vpp != NULL)) || ((error && (*vpp == NULL)))); 1717 if (!error) { 1718 dir_node = VTOI(dvp); 1719 udf_node = VTOI(*vpp); 1720 KASSERT(udf_node); 1721 error = udf_do_symlink(udf_node, ap->a_target); 1722 if (error) { 1723 /* remove node */ 1724 udf_shrink_node(udf_node, 0); 1725 udf_dir_detach(udf_node->ump, dir_node, udf_node, cnp); 1726 } 1727 } 1728 return error; 1729 } 1730 1731 /* --------------------------------------------------------------------- */ 1732 1733 int 1734 udf_readlink(void *v) 1735 { 1736 struct vop_readlink_args /* { 1737 struct vnode *a_vp; 1738 struct uio *a_uio; 1739 kauth_cred_t a_cred; 1740 } */ *ap = v; 1741 struct vnode *vp = ap->a_vp; 1742 struct uio *uio = ap->a_uio; 1743 kauth_cred_t cred = ap->a_cred; 1744 struct udf_node *udf_node; 1745 struct pathcomp pathcomp; 1746 struct vattr vattr; 1747 uint8_t *pathbuf, *targetbuf, *tmpname; 1748 uint8_t *pathpos, *targetpos; 1749 char *mntonname; 1750 int pathlen, targetlen, namelen, mntonnamelen, len, l_ci; 1751 int first, error; 1752 1753 DPRINTF(CALL, ("udf_readlink called\n")); 1754 1755 udf_node = VTOI(vp); 1756 error = VOP_GETATTR(vp, &vattr, cred); 1757 if (error) 1758 return error; 1759 1760 /* claim temporary buffers for translation */ 1761 pathbuf = malloc(UDF_SYMLINKBUFLEN, M_UDFTEMP, M_WAITOK); 1762 targetbuf = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1763 tmpname = malloc(PATH_MAX+1, M_UDFTEMP, M_WAITOK); 1764 memset(pathbuf, 0, UDF_SYMLINKBUFLEN); 1765 memset(targetbuf, 0, PATH_MAX); 1766 1767 /* read contents of file in our temporary buffer */ 1768 error = vn_rdwr(UIO_READ, udf_node->vnode, 1769 pathbuf, vattr.va_size, 0, 1770 UIO_SYSSPACE, IO_NODELOCKED | IO_ALTSEMANTICS, 1771 FSCRED, NULL, NULL); 1772 if (error) { 1773 /* failed to read in symlink contents */ 1774 free(pathbuf, M_UDFTEMP); 1775 free(targetbuf, M_UDFTEMP); 1776 free(tmpname, M_UDFTEMP); 1777 return error; 1778 } 1779 1780 /* convert to a unix path */ 1781 pathpos = pathbuf; 1782 pathlen = 0; 1783 targetpos = targetbuf; 1784 targetlen = PATH_MAX; 1785 mntonname = udf_node->ump->vfs_mountp->mnt_stat.f_mntonname; 1786 mntonnamelen = strlen(mntonname); 1787 1788 error = 0; 1789 first = 1; 1790 while (vattr.va_size - pathlen >= UDF_PATH_COMP_SIZE) { 1791 len = UDF_PATH_COMP_SIZE; 1792 memcpy(&pathcomp, pathpos, len); 1793 l_ci = pathcomp.l_ci; 1794 switch (pathcomp.type) { 1795 case UDF_PATH_COMP_ROOT : 1796 /* XXX should check for l_ci; bugcompatible now */ 1797 if ((targetlen < 1) || !first) { 1798 error = EINVAL; 1799 break; 1800 } 1801 *targetpos++ = '/'; targetlen--; 1802 break; 1803 case UDF_PATH_COMP_MOUNTROOT : 1804 /* XXX what should it be if l_ci > 0 ? [4/48.16.1.2] */ 1805 if (l_ci || (targetlen < mntonnamelen+1) || !first) { 1806 error = EINVAL; 1807 break; 1808 } 1809 memcpy(targetpos, mntonname, mntonnamelen); 1810 targetpos += mntonnamelen; targetlen -= mntonnamelen; 1811 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1812 /* more follows, so must be directory */ 1813 *targetpos++ = '/'; targetlen--; 1814 } 1815 break; 1816 case UDF_PATH_COMP_PARENTDIR : 1817 /* XXX should check for l_ci; bugcompatible now */ 1818 if (targetlen < 3) { 1819 error = EINVAL; 1820 break; 1821 } 1822 *targetpos++ = '.'; targetlen--; 1823 *targetpos++ = '.'; targetlen--; 1824 *targetpos++ = '/'; targetlen--; 1825 break; 1826 case UDF_PATH_COMP_CURDIR : 1827 /* XXX should check for l_ci; bugcompatible now */ 1828 if (targetlen < 2) { 1829 error = EINVAL; 1830 break; 1831 } 1832 *targetpos++ = '.'; targetlen--; 1833 *targetpos++ = '/'; targetlen--; 1834 break; 1835 case UDF_PATH_COMP_NAME : 1836 if (l_ci == 0) { 1837 error = EINVAL; 1838 break; 1839 } 1840 memset(tmpname, 0, PATH_MAX); 1841 memcpy(&pathcomp, pathpos, len + l_ci); 1842 udf_to_unix_name(tmpname, MAXPATHLEN, 1843 pathcomp.ident, l_ci, 1844 &udf_node->ump->logical_vol->desc_charset); 1845 namelen = strlen(tmpname); 1846 if (targetlen < namelen + 1) { 1847 error = EINVAL; 1848 break; 1849 } 1850 memcpy(targetpos, tmpname, namelen); 1851 targetpos += namelen; targetlen -= namelen; 1852 if (vattr.va_size-pathlen > UDF_PATH_COMP_SIZE+l_ci) { 1853 /* more follows, so must be directory */ 1854 *targetpos++ = '/'; targetlen--; 1855 } 1856 break; 1857 default : 1858 error = EINVAL; 1859 break; 1860 } 1861 first = 0; 1862 if (error) 1863 break; 1864 pathpos += UDF_PATH_COMP_SIZE + l_ci; 1865 pathlen += UDF_PATH_COMP_SIZE + l_ci; 1866 1867 } 1868 /* all processed? */ 1869 if (vattr.va_size - pathlen > 0) 1870 error = EINVAL; 1871 1872 /* uiomove() to destination */ 1873 if (!error) 1874 uiomove(targetbuf, PATH_MAX - targetlen, uio); 1875 1876 free(pathbuf, M_UDFTEMP); 1877 free(targetbuf, M_UDFTEMP); 1878 free(tmpname, M_UDFTEMP); 1879 1880 return error; 1881 } 1882 1883 /* --------------------------------------------------------------------- */ 1884 1885 /* 1886 * udf_rename() moved to udf_rename.c 1887 */ 1888 1889 /* --------------------------------------------------------------------- */ 1890 1891 int 1892 udf_remove(void *v) 1893 { 1894 struct vop_remove_args /* { 1895 struct vnode *a_dvp; 1896 struct vnode *a_vp; 1897 struct componentname *a_cnp; 1898 } */ *ap = v; 1899 struct vnode *dvp = ap->a_dvp; 1900 struct vnode *vp = ap->a_vp; 1901 struct componentname *cnp = ap->a_cnp; 1902 struct udf_node *dir_node = VTOI(dvp); 1903 struct udf_node *udf_node = VTOI(vp); 1904 struct udf_mount *ump = dir_node->ump; 1905 int error; 1906 1907 DPRINTF(CALL, ("udf_remove called\n")); 1908 if (vp->v_type != VDIR) { 1909 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1910 DPRINTFIF(NODE, error, ("\tgot error removing file\n")); 1911 } else { 1912 DPRINTF(NODE, ("\tis a directory: perm. denied\n")); 1913 error = EPERM; 1914 } 1915 1916 if (error == 0) { 1917 VN_KNOTE(vp, NOTE_DELETE); 1918 VN_KNOTE(dvp, NOTE_WRITE); 1919 } 1920 1921 if (dvp == vp) 1922 vrele(vp); 1923 else 1924 vput(vp); 1925 vput(dvp); 1926 1927 return error; 1928 } 1929 1930 /* --------------------------------------------------------------------- */ 1931 1932 int 1933 udf_rmdir(void *v) 1934 { 1935 struct vop_rmdir_args /* { 1936 struct vnode *a_dvp; 1937 struct vnode *a_vp; 1938 struct componentname *a_cnp; 1939 } */ *ap = v; 1940 struct vnode *vp = ap->a_vp; 1941 struct vnode *dvp = ap->a_dvp; 1942 struct componentname *cnp = ap->a_cnp; 1943 struct udf_node *dir_node = VTOI(dvp); 1944 struct udf_node *udf_node = VTOI(vp); 1945 struct udf_mount *ump = dir_node->ump; 1946 int error, isempty; 1947 1948 DPRINTF(NOTIMPL, ("udf_rmdir '%s' called\n", cnp->cn_nameptr)); 1949 1950 /* don't allow '.' to be deleted */ 1951 if (dir_node == udf_node) { 1952 vrele(dvp); 1953 vput(vp); 1954 return EINVAL; 1955 } 1956 1957 /* make sure our `leaf' node's hash is populated */ 1958 dirhash_get(&udf_node->dir_hash); 1959 error = udf_dirhash_fill(udf_node); 1960 if (error) { 1961 dirhash_put(udf_node->dir_hash); 1962 return error; 1963 } 1964 1965 /* check to see if the directory is empty */ 1966 isempty = dirhash_dir_isempty(udf_node->dir_hash); 1967 dirhash_put(udf_node->dir_hash); 1968 1969 if (!isempty) { 1970 vput(dvp); 1971 vput(vp); 1972 return ENOTEMPTY; 1973 } 1974 1975 /* detach the node from the directory, udf_node is an empty dir here */ 1976 error = udf_dir_detach(ump, dir_node, udf_node, cnp); 1977 if (error == 0) { 1978 cache_purge(vp); 1979 // cache_purge(dvp); /* XXX from msdosfs, why? */ 1980 /* 1981 * Bug alert: we need to remove '..' from the detaching 1982 * udf_node so further lookups of this are not possible. This 1983 * prevents a process in a deleted directory from going to its 1984 * deleted parent. Since `udf_node' is garanteed to be empty 1985 * here, trunc it so no fids are there. 1986 */ 1987 dirhash_purge(&udf_node->dir_hash); 1988 udf_shrink_node(udf_node, 0); 1989 VN_KNOTE(vp, NOTE_DELETE); 1990 } 1991 DPRINTFIF(NODE, error, ("\tgot error removing dir\n")); 1992 1993 /* unput the nodes and exit */ 1994 vput(dvp); 1995 vput(vp); 1996 1997 return error; 1998 } 1999 2000 /* --------------------------------------------------------------------- */ 2001 2002 int 2003 udf_fsync(void *v) 2004 { 2005 struct vop_fsync_args /* { 2006 struct vnode *a_vp; 2007 kauth_cred_t a_cred; 2008 int a_flags; 2009 off_t offlo; 2010 off_t offhi; 2011 struct proc *a_p; 2012 } */ *ap = v; 2013 struct vnode *vp = ap->a_vp; 2014 struct udf_node *udf_node = VTOI(vp); 2015 int error, flags, wait; 2016 2017 DPRINTF(SYNC, ("udf_fsync called on %p : %s, %s\n", 2018 udf_node, 2019 (ap->a_flags & FSYNC_WAIT) ? "wait":"no wait", 2020 (ap->a_flags & FSYNC_DATAONLY) ? "data_only":"complete")); 2021 2022 /* flush data and wait for it when requested */ 2023 wait = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0; 2024 error = vflushbuf(vp, ap->a_flags); 2025 if (error) 2026 return error; 2027 2028 if (udf_node == NULL) { 2029 printf("udf_fsync() called on NULL udf_node!\n"); 2030 return 0; 2031 } 2032 if (vp->v_tag != VT_UDF) { 2033 printf("udf_fsync() called on node not tagged as UDF node!\n"); 2034 return 0; 2035 } 2036 2037 /* set our times */ 2038 udf_itimes(udf_node, NULL, NULL, NULL); 2039 2040 /* if called when mounted readonly, never write back */ 2041 if (vp->v_mount->mnt_flag & MNT_RDONLY) 2042 return 0; 2043 2044 /* if only data is requested, return */ 2045 if (ap->a_flags & FSYNC_DATAONLY) 2046 return 0; 2047 2048 /* check if the node is dirty 'enough'*/ 2049 flags = udf_node->i_flags & (IN_MODIFIED | IN_ACCESSED); 2050 if (flags == 0) 2051 return 0; 2052 2053 /* if we don't have to wait, check for IO pending */ 2054 if (!wait) { 2055 if (vp->v_numoutput > 0) { 2056 DPRINTF(SYNC, ("udf_fsync %p, rejecting on v_numoutput\n", udf_node)); 2057 return 0; 2058 } 2059 if (udf_node->outstanding_bufs > 0) { 2060 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_bufs\n", udf_node)); 2061 return 0; 2062 } 2063 if (udf_node->outstanding_nodedscr > 0) { 2064 DPRINTF(SYNC, ("udf_fsync %p, rejecting on outstanding_nodedscr\n", udf_node)); 2065 return 0; 2066 } 2067 } 2068 2069 /* wait until vp->v_numoutput reaches zero i.e. is finished */ 2070 if (wait) { 2071 DPRINTF(SYNC, ("udf_fsync %p, waiting\n", udf_node)); 2072 mutex_enter(vp->v_interlock); 2073 while (vp->v_numoutput) { 2074 DPRINTF(SYNC, ("udf_fsync %p, v_numoutput %d\n", udf_node, vp->v_numoutput)); 2075 cv_timedwait(&vp->v_cv, vp->v_interlock, hz/8); 2076 } 2077 mutex_exit(vp->v_interlock); 2078 DPRINTF(SYNC, ("udf_fsync %p, fin wait\n", udf_node)); 2079 } 2080 2081 /* write out node and wait for it if requested */ 2082 DPRINTF(SYNC, ("udf_fsync %p, writeout node\n", udf_node)); 2083 error = udf_writeout_node(udf_node, wait); 2084 if (error) 2085 return error; 2086 2087 /* TODO/XXX if ap->a_flags & FSYNC_CACHE, we ought to do a disc sync */ 2088 2089 return 0; 2090 } 2091 2092 /* --------------------------------------------------------------------- */ 2093 2094 int 2095 udf_advlock(void *v) 2096 { 2097 struct vop_advlock_args /* { 2098 struct vnode *a_vp; 2099 void *a_id; 2100 int a_op; 2101 struct flock *a_fl; 2102 int a_flags; 2103 } */ *ap = v; 2104 struct vnode *vp = ap->a_vp; 2105 struct udf_node *udf_node = VTOI(vp); 2106 struct file_entry *fe; 2107 struct extfile_entry *efe; 2108 uint64_t file_size; 2109 2110 DPRINTF(LOCKING, ("udf_advlock called\n")); 2111 2112 /* get directory filesize */ 2113 if (udf_node->fe) { 2114 fe = udf_node->fe; 2115 file_size = udf_rw64(fe->inf_len); 2116 } else { 2117 assert(udf_node->efe); 2118 efe = udf_node->efe; 2119 file_size = udf_rw64(efe->inf_len); 2120 } 2121 2122 return lf_advlock(ap, &udf_node->lockf, file_size); 2123 } 2124 2125 /* --------------------------------------------------------------------- */ 2126 2127 /* Global vfs vnode data structures for udfs */ 2128 int (**udf_vnodeop_p)(void *); 2129 2130 const struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 2131 { &vop_default_desc, vn_default_error }, 2132 { &vop_lookup_desc, udf_lookup }, /* lookup */ 2133 { &vop_create_desc, udf_create }, /* create */ 2134 { &vop_mknod_desc, udf_mknod }, /* mknod */ /* TODO */ 2135 { &vop_open_desc, udf_open }, /* open */ 2136 { &vop_close_desc, udf_close }, /* close */ 2137 { &vop_access_desc, udf_access }, /* access */ 2138 { &vop_getattr_desc, udf_getattr }, /* getattr */ 2139 { &vop_setattr_desc, udf_setattr }, /* setattr */ /* TODO chflags */ 2140 { &vop_read_desc, udf_read }, /* read */ 2141 { &vop_write_desc, udf_write }, /* write */ /* WRITE */ 2142 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 2143 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 2144 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ /* TODO? */ 2145 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ /* TODO? */ 2146 { &vop_poll_desc, genfs_poll }, /* poll */ /* TODO/OK? */ 2147 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ /* ? */ 2148 { &vop_revoke_desc, genfs_revoke }, /* revoke */ /* TODO? */ 2149 { &vop_mmap_desc, genfs_mmap }, /* mmap */ /* OK? */ 2150 { &vop_fsync_desc, udf_fsync }, /* fsync */ 2151 { &vop_seek_desc, genfs_seek }, /* seek */ 2152 { &vop_remove_desc, udf_remove }, /* remove */ 2153 { &vop_link_desc, udf_link }, /* link */ /* TODO */ 2154 { &vop_rename_desc, udf_rename }, /* rename */ /* TODO */ 2155 { &vop_mkdir_desc, udf_mkdir }, /* mkdir */ 2156 { &vop_rmdir_desc, udf_rmdir }, /* rmdir */ 2157 { &vop_symlink_desc, udf_symlink }, /* symlink */ /* TODO */ 2158 { &vop_readdir_desc, udf_readdir }, /* readdir */ 2159 { &vop_readlink_desc, udf_readlink }, /* readlink */ /* TEST ME */ 2160 { &vop_abortop_desc, genfs_abortop }, /* abortop */ /* TODO/OK? */ 2161 { &vop_inactive_desc, udf_inactive }, /* inactive */ 2162 { &vop_reclaim_desc, udf_reclaim }, /* reclaim */ 2163 { &vop_lock_desc, genfs_lock }, /* lock */ 2164 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 2165 { &vop_bmap_desc, udf_trivial_bmap }, /* bmap */ /* 1:1 bmap */ 2166 { &vop_strategy_desc, udf_vfsstrategy },/* strategy */ 2167 /* { &vop_print_desc, udf_print }, */ /* print */ 2168 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 2169 { &vop_pathconf_desc, udf_pathconf }, /* pathconf */ 2170 { &vop_advlock_desc, udf_advlock }, /* advlock */ /* TEST ME */ 2171 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ /* ->strategy */ 2172 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 2173 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 2174 { NULL, NULL } 2175 }; 2176 2177 2178 const struct vnodeopv_desc udf_vnodeop_opv_desc = { 2179 &udf_vnodeop_p, udf_vnodeop_entries 2180 }; 2181
Indexes created Thu Oct 02 14:10:14 GMT 2025