advnops.c revision 1.27
1 /* $NetBSD: advnops.c,v 1.27 2008/01/02 11:48:40 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 5 * Copyright (c) 1996 Matthias Scheler 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Christian E. Hopps. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: advnops.c,v 1.27 2008/01/02 11:48:40 ad Exp $"); 36 37 #if defined(_KERNEL_OPT) 38 #include "opt_quota.h" 39 #endif 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/vnode.h> 44 #include <sys/mount.h> 45 #include <sys/time.h> 46 #include <sys/queue.h> 47 #include <sys/namei.h> 48 #include <sys/buf.h> 49 #include <sys/dirent.h> 50 #include <sys/inttypes.h> 51 #include <sys/malloc.h> 52 #include <sys/pool.h> 53 #include <sys/stat.h> 54 #include <sys/unistd.h> 55 #include <sys/proc.h> 56 #include <sys/kauth.h> 57 58 #include <miscfs/genfs/genfs.h> 59 #include <miscfs/specfs/specdev.h> 60 #include <fs/adosfs/adosfs.h> 61 62 extern struct vnodeops adosfs_vnodeops; 63 64 #define adosfs_open genfs_nullop 65 int adosfs_getattr __P((void *)); 66 int adosfs_read __P((void *)); 67 int adosfs_write __P((void *)); 68 #define adosfs_fcntl genfs_fcntl 69 #define adosfs_ioctl genfs_enoioctl 70 #define adosfs_poll genfs_poll 71 int adosfs_strategy __P((void *)); 72 int adosfs_link __P((void *)); 73 int adosfs_symlink __P((void *)); 74 #define adosfs_abortop genfs_abortop 75 int adosfs_bmap __P((void *)); 76 int adosfs_print __P((void *)); 77 int adosfs_readdir __P((void *)); 78 int adosfs_access __P((void *)); 79 int adosfs_readlink __P((void *)); 80 int adosfs_inactive __P((void *)); 81 int adosfs_reclaim __P((void *)); 82 int adosfs_pathconf __P((void *)); 83 84 #define adosfs_close genfs_nullop 85 #define adosfs_fsync genfs_nullop 86 #define adosfs_lease_check genfs_lease_check 87 #define adosfs_seek genfs_seek 88 89 #define adosfs_advlock genfs_einval 90 #define adosfs_bwrite genfs_eopnotsupp 91 #define adosfs_create genfs_eopnotsupp 92 #define adosfs_mkdir genfs_eopnotsupp 93 #define adosfs_mknod genfs_eopnotsupp 94 #define adosfs_revoke genfs_revoke 95 #define adosfs_mmap genfs_mmap 96 #define adosfs_remove genfs_eopnotsupp 97 #define adosfs_rename genfs_eopnotsupp 98 #define adosfs_rmdir genfs_eopnotsupp 99 #define adosfs_setattr genfs_eopnotsupp 100 101 const struct vnodeopv_entry_desc adosfs_vnodeop_entries[] = { 102 { &vop_default_desc, vn_default_error }, 103 { &vop_lookup_desc, adosfs_lookup }, /* lookup */ 104 { &vop_create_desc, adosfs_create }, /* create */ 105 { &vop_mknod_desc, adosfs_mknod }, /* mknod */ 106 { &vop_open_desc, adosfs_open }, /* open */ 107 { &vop_close_desc, adosfs_close }, /* close */ 108 { &vop_access_desc, adosfs_access }, /* access */ 109 { &vop_getattr_desc, adosfs_getattr }, /* getattr */ 110 { &vop_setattr_desc, adosfs_setattr }, /* setattr */ 111 { &vop_read_desc, adosfs_read }, /* read */ 112 { &vop_write_desc, adosfs_write }, /* write */ 113 { &vop_lease_desc, adosfs_lease_check }, /* lease */ 114 { &vop_fcntl_desc, adosfs_fcntl }, /* fcntl */ 115 { &vop_ioctl_desc, adosfs_ioctl }, /* ioctl */ 116 { &vop_poll_desc, adosfs_poll }, /* poll */ 117 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 118 { &vop_revoke_desc, adosfs_revoke }, /* revoke */ 119 { &vop_mmap_desc, adosfs_mmap }, /* mmap */ 120 { &vop_fsync_desc, adosfs_fsync }, /* fsync */ 121 { &vop_seek_desc, adosfs_seek }, /* seek */ 122 { &vop_remove_desc, adosfs_remove }, /* remove */ 123 { &vop_link_desc, adosfs_link }, /* link */ 124 { &vop_rename_desc, adosfs_rename }, /* rename */ 125 { &vop_mkdir_desc, adosfs_mkdir }, /* mkdir */ 126 { &vop_rmdir_desc, adosfs_rmdir }, /* rmdir */ 127 { &vop_symlink_desc, adosfs_symlink }, /* symlink */ 128 { &vop_readdir_desc, adosfs_readdir }, /* readdir */ 129 { &vop_readlink_desc, adosfs_readlink }, /* readlink */ 130 { &vop_abortop_desc, adosfs_abortop }, /* abortop */ 131 { &vop_inactive_desc, adosfs_inactive }, /* inactive */ 132 { &vop_reclaim_desc, adosfs_reclaim }, /* reclaim */ 133 { &vop_lock_desc, genfs_lock }, /* lock */ 134 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 135 { &vop_bmap_desc, adosfs_bmap }, /* bmap */ 136 { &vop_strategy_desc, adosfs_strategy }, /* strategy */ 137 { &vop_print_desc, adosfs_print }, /* print */ 138 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 139 { &vop_pathconf_desc, adosfs_pathconf }, /* pathconf */ 140 { &vop_advlock_desc, adosfs_advlock }, /* advlock */ 141 { &vop_bwrite_desc, adosfs_bwrite }, /* bwrite */ 142 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 143 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 144 { NULL, NULL } 145 }; 146 147 const struct vnodeopv_desc adosfs_vnodeop_opv_desc = 148 { &adosfs_vnodeop_p, adosfs_vnodeop_entries }; 149 150 int 151 adosfs_getattr(v) 152 void *v; 153 { 154 struct vop_getattr_args /* { 155 struct vnode *a_vp; 156 struct vattr *a_vap; 157 kauth_cred_t a_cred; 158 } */ *sp = v; 159 struct vattr *vap; 160 struct adosfsmount *amp; 161 struct anode *ap; 162 u_long fblks; 163 164 #ifdef ADOSFS_DIAGNOSTIC 165 advopprint(sp); 166 #endif 167 vap = sp->a_vap; 168 ap = VTOA(sp->a_vp); 169 amp = ap->amp; 170 vattr_null(vap); 171 vap->va_uid = ap->uid; 172 vap->va_gid = ap->gid; 173 vap->va_fsid = sp->a_vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 174 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = vap->va_ctime.tv_sec = 175 ap->mtime.days * 24 * 60 * 60 + ap->mtime.mins * 60 + 176 ap->mtime.ticks / 50 + (8 * 365 + 2) * 24 * 60 * 60; 177 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = vap->va_ctime.tv_nsec = 0; 178 vap->va_gen = 0; 179 vap->va_flags = 0; 180 vap->va_rdev = NODEV; 181 vap->va_fileid = ap->block; 182 vap->va_type = sp->a_vp->v_type; 183 vap->va_mode = adunixprot(ap->adprot) & amp->mask; 184 if (sp->a_vp->v_type == VDIR) { 185 vap->va_nlink = 1; /* XXX bogus, oh well */ 186 vap->va_bytes = amp->bsize; 187 vap->va_size = amp->bsize; 188 } else { 189 /* 190 * XXX actually we can track this if we were to walk the list 191 * of links if it exists. 192 * XXX for now, just set nlink to 2 if this is a hard link 193 * to a file, or a file with a hard link. 194 */ 195 vap->va_nlink = 1 + (ap->linkto != 0); 196 /* 197 * round up to nearest blocks add number of file list 198 * blocks needed and mutiply by number of bytes per block. 199 */ 200 fblks = howmany(ap->fsize, amp->dbsize); 201 fblks += howmany(fblks, ANODENDATBLKENT(ap)); 202 vap->va_bytes = fblks * amp->dbsize; 203 vap->va_size = ap->fsize; 204 205 vap->va_blocksize = amp->dbsize; 206 } 207 #ifdef ADOSFS_DIAGNOSTIC 208 printf(" 0)"); 209 #endif 210 return(0); 211 } 212 /* 213 * are things locked??? they need to be to avoid this being 214 * deleted or changed (data block pointer blocks moving about.) 215 */ 216 int 217 adosfs_read(v) 218 void *v; 219 { 220 struct vop_read_args /* { 221 struct vnode *a_vp; 222 struct uio *a_uio; 223 int a_ioflag; 224 kauth_cred_t a_cred; 225 } */ *sp = v; 226 struct vnode *vp = sp->a_vp; 227 struct adosfsmount *amp; 228 struct anode *ap; 229 struct uio *uio; 230 struct buf *bp; 231 daddr_t lbn; 232 int size, diff, error; 233 long n, on; 234 235 #ifdef ADOSFS_DIAGNOSTIC 236 advopprint(sp); 237 #endif 238 error = 0; 239 uio = sp->a_uio; 240 ap = VTOA(sp->a_vp); 241 amp = ap->amp; 242 /* 243 * Return EOF for character devices, EIO for others 244 */ 245 if (sp->a_vp->v_type != VREG) { 246 error = EIO; 247 goto reterr; 248 } 249 if (uio->uio_resid == 0) 250 goto reterr; 251 if (uio->uio_offset < 0) { 252 error = EINVAL; 253 goto reterr; 254 } 255 256 /* 257 * to expensive to let general algorithm figure out that 258 * we are beyond the file. Do it now. 259 */ 260 if (uio->uio_offset >= ap->fsize) 261 goto reterr; 262 263 /* 264 * taken from ufs_read() 265 */ 266 267 if (vp->v_type == VREG && IS_FFS(amp)) { 268 const int advice = IO_ADV_DECODE(sp->a_ioflag); 269 error = 0; 270 271 while (uio->uio_resid > 0) { 272 void *win; 273 int flags; 274 vsize_t bytelen = MIN(ap->fsize - uio->uio_offset, 275 uio->uio_resid); 276 277 if (bytelen == 0) { 278 break; 279 } 280 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 281 &bytelen, advice, UBC_READ); 282 error = uiomove(win, bytelen, uio); 283 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 284 ubc_release(win, flags); 285 if (error) { 286 break; 287 } 288 } 289 goto out; 290 } 291 292 do { 293 size = amp->dbsize; 294 lbn = uio->uio_offset / size; 295 on = uio->uio_offset % size; 296 n = MIN(size - on, uio->uio_resid); 297 diff = ap->fsize - uio->uio_offset; 298 /* 299 * check for EOF 300 */ 301 if (diff <= 0) 302 return(0); 303 if (diff < n) 304 n = diff; 305 /* 306 * read ahead could possibly be worth something 307 * but not much as ados makes little attempt to 308 * make things contigous 309 */ 310 error = bread(sp->a_vp, lbn, amp->bsize, NOCRED, &bp); 311 if (error) { 312 brelse(bp, 0); 313 goto reterr; 314 } 315 if (!IS_FFS(amp)) { 316 if (bp->b_resid > 0) 317 error = EIO; /* OFS needs the complete block */ 318 else if (adoswordn(bp, 0) != BPT_DATA) { 319 #ifdef DIAGNOSTIC 320 printf("adosfs: bad primary type blk %" PRId64 "\n", 321 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 322 #endif 323 error = EINVAL; 324 } else if (adoscksum(bp, ap->nwords)) { 325 #ifdef DIAGNOSTIC 326 printf("adosfs: blk %" PRId64 " failed cksum.\n", 327 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 328 #endif 329 error = EINVAL; 330 } 331 } 332 333 if (error) { 334 brelse(bp, 0); 335 goto reterr; 336 } 337 #ifdef ADOSFS_DIAGNOSTIC 338 printf(" %" PRId64 "+%ld-%" PRId64 "+%ld", lbn, on, lbn, n); 339 #endif 340 n = MIN(n, size - bp->b_resid); 341 error = uiomove((char *)bp->b_data + on + 342 amp->bsize - amp->dbsize, (int)n, uio); 343 brelse(bp, 0); 344 } while (error == 0 && uio->uio_resid > 0 && n != 0); 345 346 out: 347 reterr: 348 #ifdef ADOSFS_DIAGNOSTIC 349 printf(" %d)", error); 350 #endif 351 return(error); 352 } 353 354 int 355 adosfs_write(v) 356 void *v; 357 { 358 #ifdef ADOSFS_DIAGNOSTIC 359 struct vop_write_args /* { 360 struct vnode *a_vp; 361 struct uio *a_uio; 362 int a_ioflag; 363 kauth_cred_t a_cred; 364 } */ *sp = v; 365 advopprint(sp); 366 printf(" EOPNOTSUPP)"); 367 #endif 368 return(EOPNOTSUPP); 369 } 370 371 /* 372 * Just call the device strategy routine 373 */ 374 int 375 adosfs_strategy(v) 376 void *v; 377 { 378 struct vop_strategy_args /* { 379 struct vnode *a_vp; 380 struct buf *a_bp; 381 } */ *sp = v; 382 struct buf *bp; 383 struct anode *ap; 384 struct vnode *vp; 385 int error; 386 387 #ifdef ADOSFS_DIAGNOSTIC 388 advopprint(sp); 389 #endif 390 bp = sp->a_bp; 391 if (bp->b_vp == NULL) { 392 bp->b_error = EIO; 393 biodone(bp); 394 error = EIO; 395 goto reterr; 396 } 397 vp = sp->a_vp; 398 ap = VTOA(vp); 399 if (bp->b_blkno == bp->b_lblkno) { 400 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 401 if (error) { 402 bp->b_flags = error; 403 biodone(bp); 404 goto reterr; 405 } 406 } 407 if ((long)bp->b_blkno == -1) { 408 biodone(bp); 409 error = 0; 410 goto reterr; 411 } 412 vp = ap->amp->devvp; 413 error = VOP_STRATEGY(vp, bp); 414 reterr: 415 #ifdef ADOSFS_DIAGNOSTIC 416 printf(" %d)", error); 417 #endif 418 return(error); 419 } 420 421 int 422 adosfs_link(v) 423 void *v; 424 { 425 struct vop_link_args /* { 426 struct vnode *a_dvp; 427 struct vnode *a_vp; 428 struct componentname *a_cnp; 429 } */ *ap = v; 430 431 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 432 vput(ap->a_dvp); 433 return (EROFS); 434 } 435 436 int 437 adosfs_symlink(v) 438 void *v; 439 { 440 struct vop_symlink_args /* { 441 struct vnode *a_dvp; 442 struct vnode **a_vpp; 443 struct componentname *a_cnp; 444 struct vattr *a_vap; 445 char *a_target; 446 } */ *ap = v; 447 448 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 449 vput(ap->a_dvp); 450 return (EROFS); 451 } 452 453 /* 454 * Wait until the vnode has finished changing state. 455 */ 456 int 457 adosfs_bmap(v) 458 void *v; 459 { 460 struct vop_bmap_args /* { 461 struct vnode *a_vp; 462 daddr_t a_bn; 463 struct vnode **a_vpp; 464 daddr_t *a_bnp; 465 int *a_runp; 466 } */ *sp = v; 467 struct anode *ap; 468 struct buf *flbp; 469 long nb, flblk, flblkoff, fcnt; 470 daddr_t *bnp; 471 daddr_t bn; 472 int error; 473 474 #ifdef ADOSFS_DIAGNOSTIC 475 advopprint(sp); 476 #endif 477 ap = VTOA(sp->a_vp); 478 bn = sp->a_bn; 479 bnp = sp->a_bnp; 480 if (sp->a_runp) { 481 *sp->a_runp = 0; 482 } 483 error = 0; 484 485 if (sp->a_vpp != NULL) 486 *sp->a_vpp = ap->amp->devvp; 487 if (bnp == NULL) 488 goto reterr; 489 if (bn < 0) { 490 error = EFBIG; 491 goto reterr; 492 } 493 if (sp->a_vp->v_type != VREG) { 494 error = EINVAL; 495 goto reterr; 496 } 497 498 /* 499 * walk the chain of file list blocks until we find 500 * the one that will yield the block pointer we need. 501 */ 502 if (ap->type == AFILE) 503 nb = ap->block; /* pointer to ourself */ 504 else if (ap->type == ALFILE) 505 nb = ap->linkto; /* pointer to real file */ 506 else { 507 error = EINVAL; 508 goto reterr; 509 } 510 511 flblk = bn / ANODENDATBLKENT(ap); 512 flbp = NULL; 513 514 /* 515 * check last indirect block cache 516 */ 517 if (flblk < ap->lastlindblk) 518 fcnt = 0; 519 else { 520 flblk -= ap->lastlindblk; 521 fcnt = ap->lastlindblk; 522 nb = ap->lastindblk; 523 } 524 while (flblk >= 0) { 525 if (flbp) 526 brelse(flbp, 0); 527 if (nb == 0) { 528 #ifdef DIAGNOSTIC 529 printf("adosfs: bad file list chain.\n"); 530 #endif 531 error = EINVAL; 532 goto reterr; 533 } 534 error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE, 535 ap->amp->bsize, NOCRED, &flbp); 536 if (error) { 537 brelse(flbp, 0); 538 goto reterr; 539 } 540 if (adoscksum(flbp, ap->nwords)) { 541 #ifdef DIAGNOSTIC 542 printf("adosfs: blk %ld failed cksum.\n", nb); 543 #endif 544 brelse(flbp, 0); 545 error = EINVAL; 546 goto reterr; 547 } 548 /* 549 * update last indirect block cache 550 */ 551 ap->lastlindblk = fcnt++; 552 ap->lastindblk = nb; 553 554 nb = adoswordn(flbp, ap->nwords - 2); 555 flblk--; 556 } 557 /* 558 * calculate offset of block number in table. The table starts 559 * at nwords - 51 and goes to offset 6 or less if indicated by the 560 * valid table entries stored at offset ADBI_NBLKTABENT. 561 */ 562 flblkoff = bn % ANODENDATBLKENT(ap); 563 if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) { 564 flblkoff = (ap->nwords - 51) - flblkoff; 565 *bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE; 566 } else { 567 #ifdef DIAGNOSTIC 568 printf("flblk offset %ld too large in lblk %ld blk %" PRId64 "\n", 569 flblkoff, (long)bn, flbp->b_blkno); 570 #endif 571 error = EINVAL; 572 } 573 brelse(flbp, 0); 574 reterr: 575 #ifdef ADOSFS_DIAGNOSTIC 576 if (error == 0 && bnp) 577 printf(" %lld => %lld", (long long)bn, (long long)*bnp); 578 printf(" %d)\n", error); 579 #endif 580 return(error); 581 } 582 583 /* 584 * Print out the contents of a adosfs vnode. 585 */ 586 /* ARGSUSED */ 587 int 588 adosfs_print(v) 589 void *v; 590 { 591 #if 0 592 struct vop_print_args /* { 593 struct vnode *a_vp; 594 } */ *sp = v; 595 #endif 596 return(0); 597 } 598 599 int 600 adosfs_readdir(v) 601 void *v; 602 { 603 struct vop_readdir_args /* { 604 struct vnode *a_vp; 605 struct uio *a_uio; 606 kauth_cred_t a_cred; 607 int *a_eofflag; 608 off_t **a_cookies; 609 int *a_ncookies; 610 } */ *sp = v; 611 int error, first, useri, chainc, hashi, scanned; 612 u_long nextbn; 613 struct dirent ad, *adp; 614 struct anode *pap, *ap; 615 struct vnode *vp; 616 struct uio *uio = sp->a_uio; 617 off_t uoff = uio->uio_offset; 618 off_t *cookies = NULL; 619 int ncookies = 0; 620 621 #ifdef ADOSFS_DIAGNOSTIC 622 advopprint(sp); 623 #endif 624 625 if (sp->a_vp->v_type != VDIR) { 626 error = ENOTDIR; 627 goto reterr; 628 } 629 630 if (uoff < 0) { 631 error = EINVAL; 632 goto reterr; 633 } 634 635 pap = VTOA(sp->a_vp); 636 adp = &ad; 637 error = nextbn = hashi = chainc = scanned = 0; 638 first = useri = uoff / sizeof ad; 639 640 /* 641 * If offset requested is not on a slot boundary 642 */ 643 if (uoff % sizeof ad) { 644 error = EINVAL; 645 goto reterr; 646 } 647 648 for (;;) { 649 if (hashi == pap->ntabent) { 650 *sp->a_eofflag = 1; 651 break; 652 } 653 if (pap->tab[hashi] == 0) { 654 hashi++; 655 continue; 656 } 657 if (nextbn == 0) 658 nextbn = pap->tab[hashi]; 659 660 /* 661 * First determine if we can skip this chain 662 */ 663 if (chainc == 0) { 664 int skip; 665 666 skip = useri - scanned; 667 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) { 668 scanned += pap->tabi[hashi]; 669 hashi++; 670 nextbn = 0; 671 continue; 672 } 673 } 674 675 /* 676 * Now [continue to] walk the chain 677 */ 678 ap = NULL; 679 do { 680 error = VFS_VGET(pap->amp->mp, (ino_t)nextbn, &vp); 681 if (error) 682 goto reterr; 683 ap = VTOA(vp); 684 scanned++; 685 chainc++; 686 nextbn = ap->hashf; 687 688 /* 689 * check for end of chain. 690 */ 691 if (nextbn == 0) { 692 pap->tabi[hashi] = chainc; 693 hashi++; 694 chainc = 0; 695 } else if (pap->tabi[hashi] <= 0 && 696 -chainc < pap->tabi[hashi]) 697 pap->tabi[hashi] = -chainc; 698 699 if (useri >= scanned) { 700 vput(vp); 701 ap = NULL; 702 } 703 } while (ap == NULL && nextbn != 0); 704 705 /* 706 * We left the loop but without a result so do main over. 707 */ 708 if (ap == NULL) 709 continue; 710 /* 711 * Fill in dirent record 712 */ 713 memset(adp, 0, sizeof *adp); 714 adp->d_fileno = ap->block; 715 /* 716 * This deserves a function in kern/vfs_subr.c 717 */ 718 switch (ATOV(ap)->v_type) { 719 case VREG: 720 adp->d_type = DT_REG; 721 break; 722 case VDIR: 723 adp->d_type = DT_DIR; 724 break; 725 case VLNK: 726 adp->d_type = DT_LNK; 727 break; 728 default: 729 adp->d_type = DT_UNKNOWN; 730 break; 731 } 732 adp->d_namlen = strlen(ap->name); 733 memcpy(adp->d_name, ap->name, adp->d_namlen); 734 adp->d_reclen = _DIRENT_SIZE(adp); 735 vput(vp); 736 737 if (adp->d_reclen > uio->uio_resid) { 738 if (useri == first) /* no room for even one entry */ 739 error = EINVAL; 740 break; 741 } 742 error = uiomove(adp, adp->d_reclen, uio); 743 if (error) 744 break; 745 useri++; 746 } 747 ncookies = useri - first; 748 uio->uio_offset = uoff + ncookies * sizeof ad; 749 reterr: 750 #ifdef ADOSFS_DIAGNOSTIC 751 printf(" %d)", error); 752 #endif 753 if (sp->a_ncookies != NULL) { 754 *sp->a_ncookies = ncookies; 755 if (!error) { 756 *sp->a_cookies = cookies = 757 malloc(ncookies * sizeof *cookies, M_TEMP, M_WAITOK); 758 759 while (ncookies--) { 760 uoff += sizeof ad; 761 *cookies++ = uoff; 762 } 763 } else 764 *sp->a_cookies = NULL; 765 } 766 767 return(error); 768 } 769 770 771 int 772 adosfs_access(v) 773 void *v; 774 { 775 struct vop_access_args /* { 776 struct vnode *a_vp; 777 int a_mode; 778 kauth_cred_t a_cred; 779 } */ *sp = v; 780 struct anode *ap; 781 struct vnode *vp = sp->a_vp; 782 int error; 783 784 #ifdef ADOSFS_DIAGNOSTIC 785 advopprint(sp); 786 #endif 787 788 ap = VTOA(vp); 789 #ifdef DIAGNOSTIC 790 if (!VOP_ISLOCKED(vp)) { 791 vprint("adosfs_access: not locked", sp->a_vp); 792 panic("adosfs_access: not locked"); 793 } 794 #endif 795 /* 796 * Disallow write attempts unless the file is a socket, 797 * fifo, or a block or character device resident on the 798 * file system. 799 */ 800 if (sp->a_mode & VWRITE) { 801 switch (vp->v_type) { 802 case VDIR: 803 case VLNK: 804 case VREG: 805 return (EROFS); 806 default: 807 break; 808 } 809 } 810 #ifdef QUOTA 811 #endif 812 error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask, 813 ap->uid, ap->gid, sp->a_mode, sp->a_cred); 814 #ifdef ADOSFS_DIAGNOSTIC 815 printf(" %d)", error); 816 #endif 817 return(error); 818 } 819 820 int 821 adosfs_readlink(v) 822 void *v; 823 { 824 struct vop_readlink_args /* { 825 struct vnode *a_vp; 826 struct uio *a_uio; 827 kauth_cred_t a_cred; 828 } */ *sp = v; 829 struct anode *ap; 830 int error; 831 832 #ifdef ADOSFS_DIAGNOSTIC 833 advopprint(sp); 834 #endif 835 ap = VTOA(sp->a_vp); 836 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio); 837 #ifdef ADOSFS_DIAGNOSTIC 838 printf(" %d)", error); 839 #endif 840 return (error); 841 } 842 843 /*ARGSUSED*/ 844 int 845 adosfs_inactive(v) 846 void *v; 847 { 848 struct vop_inactive_args /* { 849 struct vnode *a_vp; 850 bool *a_recycle; 851 } */ *sp = v; 852 struct vnode *vp = sp->a_vp; 853 #ifdef ADOSFS_DIAGNOSTIC 854 advopprint(sp); 855 #endif 856 VOP_UNLOCK(vp, 0); 857 /* XXX this needs to check if file was deleted */ 858 *sp->a_recycle = true; 859 860 #ifdef ADOSFS_DIAGNOSTIC 861 printf(" 0)"); 862 #endif 863 return(0); 864 } 865 866 /* 867 * the kernel wants its vnode back. 868 * no lock needed we are being called from vclean() 869 */ 870 int 871 adosfs_reclaim(v) 872 void *v; 873 { 874 struct vop_reclaim_args /* { 875 struct vnode *a_vp; 876 } */ *sp = v; 877 struct vnode *vp; 878 struct anode *ap; 879 880 #ifdef ADOSFS_DIAGNOSTIC 881 printf("(reclaim 0)"); 882 #endif 883 vp = sp->a_vp; 884 ap = VTOA(vp); 885 LIST_REMOVE(ap, link); 886 cache_purge(vp); 887 if (vp->v_type == VDIR && ap->tab) 888 free(ap->tab, M_ANODE); 889 else if (vp->v_type == VLNK && ap->slinkto) 890 free(ap->slinkto, M_ANODE); 891 genfs_node_destroy(vp); 892 pool_put(&adosfs_node_pool, ap); 893 vp->v_data = NULL; 894 return(0); 895 } 896 897 /* 898 * POSIX pathconf info, grabbed from kern/u fs, probably need to 899 * investigate exactly what each return type means as they are probably 900 * not valid currently 901 */ 902 int 903 adosfs_pathconf(v) 904 void *v; 905 { 906 struct vop_pathconf_args /* { 907 struct vnode *a_vp; 908 int a_name; 909 register_t *a_retval; 910 } */ *ap = v; 911 912 switch (ap->a_name) { 913 case _PC_LINK_MAX: 914 *ap->a_retval = LINK_MAX; 915 return (0); 916 case _PC_NAME_MAX: 917 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 918 return (0); 919 case _PC_PATH_MAX: 920 *ap->a_retval = PATH_MAX; 921 return (0); 922 case _PC_PIPE_BUF: 923 *ap->a_retval = PIPE_BUF; 924 return (0); 925 case _PC_CHOWN_RESTRICTED: 926 *ap->a_retval = 1; 927 return (0); 928 case _PC_VDISABLE: 929 *ap->a_retval = _POSIX_VDISABLE; 930 return (0); 931 case _PC_SYNC_IO: 932 *ap->a_retval = 1; 933 return (0); 934 case _PC_FILESIZEBITS: 935 *ap->a_retval = 32; 936 return (0); 937 default: 938 return (EINVAL); 939 } 940 /* NOTREACHED */ 941 } 942
Indexes created Wed Sep 24 22:09:59 GMT 2025