advnops.c revision 1.15.6.1
1 /* $NetBSD: advnops.c,v 1.15.6.1 2005/10/20 05:16:20 yamt 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 1.15.6.1 2005/10/20 05:16:20 yamt 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/malloc.h> 51 #include <sys/pool.h> 52 #include <sys/stat.h> 53 #include <sys/unistd.h> 54 #include <sys/proc.h> 55 56 #include <miscfs/genfs/genfs.h> 57 #include <miscfs/specfs/specdev.h> 58 #include <fs/adosfs/adosfs.h> 59 60 extern struct vnodeops adosfs_vnodeops; 61 62 #define adosfs_open genfs_nullop 63 int adosfs_getattr __P((void *)); 64 int adosfs_read __P((void *)); 65 int adosfs_write __P((void *)); 66 #define adosfs_fcntl genfs_fcntl 67 #define adosfs_ioctl genfs_enoioctl 68 #define adosfs_poll genfs_poll 69 int adosfs_strategy __P((void *)); 70 int adosfs_link __P((void *)); 71 int adosfs_symlink __P((void *)); 72 #define adosfs_abortop genfs_abortop 73 int adosfs_bmap __P((void *)); 74 int adosfs_print __P((void *)); 75 int adosfs_readdir __P((void *)); 76 int adosfs_access __P((void *)); 77 int adosfs_readlink __P((void *)); 78 int adosfs_inactive __P((void *)); 79 int adosfs_reclaim __P((void *)); 80 int adosfs_pathconf __P((void *)); 81 82 #define adosfs_close genfs_nullop 83 #define adosfs_fsync genfs_nullop 84 #define adosfs_lease_check genfs_lease_check 85 #define adosfs_seek genfs_seek 86 87 #define adosfs_advlock genfs_einval 88 #define adosfs_bwrite genfs_eopnotsupp 89 #define adosfs_create genfs_eopnotsupp 90 #define adosfs_mkdir genfs_eopnotsupp 91 #define adosfs_mknod genfs_eopnotsupp 92 #define adosfs_revoke genfs_revoke 93 #define adosfs_mmap genfs_mmap 94 #define adosfs_remove genfs_eopnotsupp 95 #define adosfs_rename genfs_eopnotsupp 96 #define adosfs_rmdir genfs_eopnotsupp 97 #define adosfs_setattr genfs_eopnotsupp 98 99 const struct vnodeopv_entry_desc adosfs_vnodeop_entries[] = { 100 { &vop_default_desc, vn_default_error }, 101 { &vop_lookup_desc, adosfs_lookup }, /* lookup */ 102 { &vop_create_desc, adosfs_create }, /* create */ 103 { &vop_mknod_desc, adosfs_mknod }, /* mknod */ 104 { &vop_open_desc, adosfs_open }, /* open */ 105 { &vop_close_desc, adosfs_close }, /* close */ 106 { &vop_access_desc, adosfs_access }, /* access */ 107 { &vop_getattr_desc, adosfs_getattr }, /* getattr */ 108 { &vop_setattr_desc, adosfs_setattr }, /* setattr */ 109 { &vop_read_desc, adosfs_read }, /* read */ 110 { &vop_write_desc, adosfs_write }, /* write */ 111 { &vop_lease_desc, adosfs_lease_check }, /* lease */ 112 { &vop_fcntl_desc, adosfs_fcntl }, /* fcntl */ 113 { &vop_ioctl_desc, adosfs_ioctl }, /* ioctl */ 114 { &vop_poll_desc, adosfs_poll }, /* poll */ 115 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 116 { &vop_revoke_desc, adosfs_revoke }, /* revoke */ 117 { &vop_mmap_desc, adosfs_mmap }, /* mmap */ 118 { &vop_fsync_desc, adosfs_fsync }, /* fsync */ 119 { &vop_seek_desc, adosfs_seek }, /* seek */ 120 { &vop_remove_desc, adosfs_remove }, /* remove */ 121 { &vop_link_desc, adosfs_link }, /* link */ 122 { &vop_rename_desc, adosfs_rename }, /* rename */ 123 { &vop_mkdir_desc, adosfs_mkdir }, /* mkdir */ 124 { &vop_rmdir_desc, adosfs_rmdir }, /* rmdir */ 125 { &vop_symlink_desc, adosfs_symlink }, /* symlink */ 126 { &vop_readdir_desc, adosfs_readdir }, /* readdir */ 127 { &vop_readlink_desc, adosfs_readlink }, /* readlink */ 128 { &vop_abortop_desc, adosfs_abortop }, /* abortop */ 129 { &vop_inactive_desc, adosfs_inactive }, /* inactive */ 130 { &vop_reclaim_desc, adosfs_reclaim }, /* reclaim */ 131 { &vop_lock_desc, genfs_lock }, /* lock */ 132 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 133 { &vop_bmap_desc, adosfs_bmap }, /* bmap */ 134 { &vop_strategy_desc, adosfs_strategy }, /* strategy */ 135 { &vop_print_desc, adosfs_print }, /* print */ 136 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 137 { &vop_pathconf_desc, adosfs_pathconf }, /* pathconf */ 138 { &vop_advlock_desc, adosfs_advlock }, /* advlock */ 139 { &vop_bwrite_desc, adosfs_bwrite }, /* bwrite */ 140 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 141 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 142 { NULL, NULL } 143 }; 144 145 const struct vnodeopv_desc adosfs_vnodeop_opv_desc = 146 { &adosfs_vnodeop_p, adosfs_vnodeop_entries }; 147 148 int 149 adosfs_getattr(v) 150 void *v; 151 { 152 struct vop_getattr_args /* { 153 struct vnode *a_vp; 154 struct vattr *a_vap; 155 struct ucred *a_cred; 156 struct proc *a_p; 157 } */ *sp = v; 158 struct vattr *vap; 159 struct adosfsmount *amp; 160 struct anode *ap; 161 u_long fblks; 162 163 #ifdef ADOSFS_DIAGNOSTIC 164 advopprint(sp); 165 #endif 166 vap = sp->a_vap; 167 ap = VTOA(sp->a_vp); 168 amp = ap->amp; 169 vattr_null(vap); 170 vap->va_uid = ap->uid; 171 vap->va_gid = ap->gid; 172 vap->va_fsid = sp->a_vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 173 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = vap->va_ctime.tv_sec = 174 ap->mtime.days * 24 * 60 * 60 + ap->mtime.mins * 60 + 175 ap->mtime.ticks / 50 + (8 * 365 + 2) * 24 * 60 * 60; 176 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = vap->va_ctime.tv_nsec = 0; 177 vap->va_gen = 0; 178 vap->va_flags = 0; 179 vap->va_rdev = NODEV; 180 vap->va_fileid = ap->block; 181 vap->va_type = sp->a_vp->v_type; 182 vap->va_mode = adunixprot(ap->adprot) & amp->mask; 183 if (sp->a_vp->v_type == VDIR) { 184 vap->va_nlink = 1; /* XXX bogus, oh well */ 185 vap->va_bytes = amp->bsize; 186 vap->va_size = amp->bsize; 187 } else { 188 /* 189 * XXX actually we can track this if we were to walk the list 190 * of links if it exists. 191 * XXX for now, just set nlink to 2 if this is a hard link 192 * to a file, or a file with a hard link. 193 */ 194 vap->va_nlink = 1 + (ap->linkto != 0); 195 /* 196 * round up to nearest blocks add number of file list 197 * blocks needed and mutiply by number of bytes per block. 198 */ 199 fblks = howmany(ap->fsize, amp->dbsize); 200 fblks += howmany(fblks, ANODENDATBLKENT(ap)); 201 vap->va_bytes = fblks * amp->dbsize; 202 vap->va_size = ap->fsize; 203 204 vap->va_blocksize = amp->dbsize; 205 } 206 #ifdef ADOSFS_DIAGNOSTIC 207 printf(" 0)"); 208 #endif 209 return(0); 210 } 211 /* 212 * are things locked??? they need to be to avoid this being 213 * deleted or changed (data block pointer blocks moving about.) 214 */ 215 int 216 adosfs_read(v) 217 void *v; 218 { 219 struct vop_read_args /* { 220 struct vnode *a_vp; 221 struct uio *a_uio; 222 int a_ioflag; 223 struct ucred *a_cred; 224 } */ *sp = v; 225 struct vnode *vp = sp->a_vp; 226 struct adosfsmount *amp; 227 struct anode *ap; 228 struct uio *uio; 229 struct buf *bp; 230 daddr_t lbn; 231 int size, diff, error; 232 long n, on; 233 234 #ifdef ADOSFS_DIAGNOSTIC 235 advopprint(sp); 236 #endif 237 error = 0; 238 uio = sp->a_uio; 239 ap = VTOA(sp->a_vp); 240 amp = ap->amp; 241 /* 242 * Return EOF for character devices, EIO for others 243 */ 244 if (sp->a_vp->v_type != VREG) { 245 error = EIO; 246 goto reterr; 247 } 248 if (uio->uio_resid == 0) 249 goto reterr; 250 if (uio->uio_offset < 0) { 251 error = EINVAL; 252 goto reterr; 253 } 254 255 /* 256 * to expensive to let general algorithm figure out that 257 * we are beyond the file. Do it now. 258 */ 259 if (uio->uio_offset >= ap->fsize) 260 goto reterr; 261 262 /* 263 * taken from ufs_read() 264 */ 265 266 if (vp->v_type == VREG && IS_FFS(amp)) { 267 error = 0; 268 while (uio->uio_resid > 0) { 269 void *win; 270 int flags; 271 vsize_t bytelen = MIN(ap->fsize - uio->uio_offset, 272 uio->uio_resid); 273 274 if (bytelen == 0) { 275 break; 276 } 277 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 278 &bytelen, UBC_READ); 279 error = uiomove(win, bytelen, uio); 280 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 281 ubc_release(win, flags); 282 if (error) { 283 break; 284 } 285 } 286 goto out; 287 } 288 289 do { 290 size = amp->dbsize; 291 lbn = uio->uio_offset / size; 292 on = uio->uio_offset % size; 293 n = MIN(size - on, uio->uio_resid); 294 diff = ap->fsize - uio->uio_offset; 295 /* 296 * check for EOF 297 */ 298 if (diff <= 0) 299 return(0); 300 if (diff < n) 301 n = diff; 302 /* 303 * read ahead could possibly be worth something 304 * but not much as ados makes little attempt to 305 * make things contigous 306 */ 307 error = bread(sp->a_vp, lbn, amp->bsize, NOCRED, &bp); 308 if (error) { 309 brelse(bp); 310 goto reterr; 311 } 312 if (!IS_FFS(amp)) { 313 if (bp->b_resid > 0) 314 error = EIO; /* OFS needs the complete block */ 315 else if (adoswordn(bp, 0) != BPT_DATA) { 316 #ifdef DIAGNOSTIC 317 printf("adosfs: bad primary type blk %" PRId64 "\n", 318 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 319 #endif 320 error = EINVAL; 321 } else if (adoscksum(bp, ap->nwords)) { 322 #ifdef DIAGNOSTIC 323 printf("adosfs: blk %" PRId64 " failed cksum.\n", 324 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 325 #endif 326 error = EINVAL; 327 } 328 } 329 330 if (error) { 331 brelse(bp); 332 goto reterr; 333 } 334 #ifdef ADOSFS_DIAGNOSTIC 335 printf(" %d+%d-%d+%d", lbn, on, lbn, n); 336 #endif 337 n = MIN(n, size - bp->b_resid); 338 error = uiomove(bp->b_data + on + 339 amp->bsize - amp->dbsize, (int)n, uio); 340 brelse(bp); 341 } while (error == 0 && uio->uio_resid > 0 && n != 0); 342 343 out: 344 reterr: 345 #ifdef ADOSFS_DIAGNOSTIC 346 printf(" %d)", error); 347 #endif 348 return(error); 349 } 350 351 int 352 adosfs_write(v) 353 void *v; 354 { 355 #ifdef ADOSFS_DIAGNOSTIC 356 struct vop_write_args /* { 357 struct vnode *a_vp; 358 struct uio *a_uio; 359 int a_ioflag; 360 struct ucred *a_cred; 361 } */ *sp = v; 362 advopprint(sp); 363 printf(" EOPNOTSUPP)"); 364 #endif 365 return(EOPNOTSUPP); 366 } 367 368 /* 369 * Just call the device strategy routine 370 */ 371 int 372 adosfs_strategy(v) 373 void *v; 374 { 375 struct vop_strategy_args /* { 376 struct vnode *a_vp; 377 struct buf *a_bp; 378 } */ *sp = v; 379 struct buf *bp; 380 struct anode *ap; 381 struct vnode *vp; 382 int error; 383 384 #ifdef ADOSFS_DIAGNOSTIC 385 advopprint(sp); 386 #endif 387 bp = sp->a_bp; 388 if (bp->b_vp == NULL) { 389 bp->b_flags |= B_ERROR; 390 biodone(bp); 391 error = EIO; 392 goto reterr; 393 } 394 vp = sp->a_vp; 395 ap = VTOA(vp); 396 if (bp->b_blkno == bp->b_lblkno) { 397 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 398 if (error) { 399 bp->b_flags |= B_ERROR; 400 biodone(bp); 401 goto reterr; 402 } 403 } 404 if ((long)bp->b_blkno == -1) { 405 biodone(bp); 406 error = 0; 407 goto reterr; 408 } 409 vp = ap->amp->devvp; 410 error = VOP_STRATEGY(vp, bp); 411 reterr: 412 #ifdef ADOSFS_DIAGNOSTIC 413 printf(" %d)", error); 414 #endif 415 return(error); 416 } 417 418 int 419 adosfs_link(v) 420 void *v; 421 { 422 struct vop_link_args /* { 423 struct vnode *a_dvp; 424 struct vnode *a_vp; 425 struct componentname *a_cnp; 426 } */ *ap = v; 427 428 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 429 vput(ap->a_dvp); 430 return (EROFS); 431 } 432 433 int 434 adosfs_symlink(v) 435 void *v; 436 { 437 struct vop_symlink_args /* { 438 struct vnode *a_dvp; 439 struct vnode **a_vpp; 440 struct componentname *a_cnp; 441 struct vattr *a_vap; 442 char *a_target; 443 } */ *ap = v; 444 445 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 446 vput(ap->a_dvp); 447 return (EROFS); 448 } 449 450 /* 451 * Wait until the vnode has finished changing state. 452 */ 453 int 454 adosfs_bmap(v) 455 void *v; 456 { 457 struct vop_bmap_args /* { 458 struct vnode *a_vp; 459 daddr_t a_bn; 460 struct vnode **a_vpp; 461 daddr_t *a_bnp; 462 int *a_runp; 463 } */ *sp = v; 464 struct anode *ap; 465 struct buf *flbp; 466 long nb, flblk, flblkoff, fcnt; 467 daddr_t *bnp; 468 daddr_t bn; 469 int error; 470 471 #ifdef ADOSFS_DIAGNOSTIC 472 advopprint(sp); 473 #endif 474 ap = VTOA(sp->a_vp); 475 bn = sp->a_bn; 476 bnp = sp->a_bnp; 477 if (sp->a_runp) { 478 *sp->a_runp = 0; 479 } 480 error = 0; 481 482 if (sp->a_vpp != NULL) 483 *sp->a_vpp = ap->amp->devvp; 484 if (bnp == NULL) 485 goto reterr; 486 if (bn < 0) { 487 error = EFBIG; 488 goto reterr; 489 } 490 if (sp->a_vp->v_type != VREG) { 491 error = EINVAL; 492 goto reterr; 493 } 494 495 /* 496 * walk the chain of file list blocks until we find 497 * the one that will yield the block pointer we need. 498 */ 499 if (ap->type == AFILE) 500 nb = ap->block; /* pointer to ourself */ 501 else if (ap->type == ALFILE) 502 nb = ap->linkto; /* pointer to real file */ 503 else { 504 error = EINVAL; 505 goto reterr; 506 } 507 508 flblk = bn / ANODENDATBLKENT(ap); 509 flbp = NULL; 510 511 /* 512 * check last indirect block cache 513 */ 514 if (flblk < ap->lastlindblk) 515 fcnt = 0; 516 else { 517 flblk -= ap->lastlindblk; 518 fcnt = ap->lastlindblk; 519 nb = ap->lastindblk; 520 } 521 while (flblk >= 0) { 522 if (flbp) 523 brelse(flbp); 524 if (nb == 0) { 525 #ifdef DIAGNOSTIC 526 printf("adosfs: bad file list chain.\n"); 527 #endif 528 error = EINVAL; 529 goto reterr; 530 } 531 error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE, 532 ap->amp->bsize, NOCRED, &flbp); 533 if (error) { 534 brelse(flbp); 535 goto reterr; 536 } 537 if (adoscksum(flbp, ap->nwords)) { 538 #ifdef DIAGNOSTIC 539 printf("adosfs: blk %ld failed cksum.\n", nb); 540 #endif 541 brelse(flbp); 542 error = EINVAL; 543 goto reterr; 544 } 545 /* 546 * update last indirect block cache 547 */ 548 ap->lastlindblk = fcnt++; 549 ap->lastindblk = nb; 550 551 nb = adoswordn(flbp, ap->nwords - 2); 552 flblk--; 553 } 554 /* 555 * calculate offset of block number in table. The table starts 556 * at nwords - 51 and goes to offset 6 or less if indicated by the 557 * valid table entries stored at offset ADBI_NBLKTABENT. 558 */ 559 flblkoff = bn % ANODENDATBLKENT(ap); 560 if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) { 561 flblkoff = (ap->nwords - 51) - flblkoff; 562 *bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE; 563 } else { 564 #ifdef DIAGNOSTIC 565 printf("flblk offset %ld too large in lblk %ld blk %" PRId64 "\n", 566 flblkoff, (long)bn, flbp->b_blkno); 567 #endif 568 error = EINVAL; 569 } 570 brelse(flbp); 571 reterr: 572 #ifdef ADOSFS_DIAGNOSTIC 573 if (error == 0 && bnp) 574 printf(" %lld => %lld", (long long)bn, (long long)*bnp); 575 printf(" %d)\n", error); 576 #endif 577 return(error); 578 } 579 580 /* 581 * Print out the contents of a adosfs vnode. 582 */ 583 /* ARGSUSED */ 584 int 585 adosfs_print(v) 586 void *v; 587 { 588 #if 0 589 struct vop_print_args /* { 590 struct vnode *a_vp; 591 } */ *sp = v; 592 #endif 593 return(0); 594 } 595 596 struct adirent { 597 u_long fileno; 598 u_short reclen; 599 char type; 600 char namlen; 601 char name[ADMAXNAMELEN+2]; /* maxlen plus 2 NUL's */ 602 }; 603 604 int 605 adosfs_readdir(v) 606 void *v; 607 { 608 struct vop_readdir_args /* { 609 struct vnode *a_vp; 610 struct uio *a_uio; 611 struct ucred *a_cred; 612 int *a_eofflag; 613 off_t **a_cookies; 614 int *a_ncookies; 615 } */ *sp = v; 616 int error, useri, chainc, hashi, scanned, uavail; 617 struct adirent ad, *adp; 618 struct anode *pap, *ap; 619 struct adosfsmount *amp; 620 struct vnode *vp; 621 struct uio *uio; 622 u_long nextbn; 623 off_t uoff, *cookies = NULL; 624 int ncookies = 0; 625 626 #ifdef ADOSFS_DIAGNOSTIC 627 advopprint(sp); 628 #endif 629 if (sp->a_vp->v_type != VDIR) { 630 error = ENOTDIR; 631 goto reterr; 632 } 633 634 uio = sp->a_uio; 635 uoff = uio->uio_offset; 636 if (uoff < 0) { 637 error = EINVAL; 638 goto reterr; 639 } 640 641 pap = VTOA(sp->a_vp); 642 amp = pap->amp; 643 adp = &ad; 644 error = nextbn = hashi = chainc = scanned = 0; 645 uavail = uio->uio_resid / sizeof(ad); 646 useri = uoff / sizeof(ad); 647 648 /* 649 * if no slots available or offset requested is not on a slot boundry 650 */ 651 if (uavail < 1 || uoff % sizeof(ad)) { 652 error = EINVAL; 653 goto reterr; 654 } 655 656 if (sp->a_ncookies) { 657 ncookies = 0; 658 cookies = malloc(sizeof (off_t) * uavail, M_TEMP, M_WAITOK); 659 *sp->a_cookies = cookies; 660 } 661 662 while (uavail) { 663 if (hashi == pap->ntabent) { 664 *sp->a_eofflag = 1; 665 break; 666 } 667 if (pap->tab[hashi] == 0) { 668 hashi++; 669 continue; 670 } 671 if (nextbn == 0) 672 nextbn = pap->tab[hashi]; 673 674 /* 675 * first determine if we can skip this chain 676 */ 677 if (chainc == 0) { 678 int skip; 679 680 skip = useri - scanned; 681 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) { 682 scanned += pap->tabi[hashi]; 683 hashi++; 684 nextbn = 0; 685 continue; 686 } 687 } 688 689 /* 690 * now [continue to] walk the chain 691 */ 692 ap = NULL; 693 do { 694 error = VFS_VGET(amp->mp, (ino_t)nextbn, &vp); 695 if (error) 696 goto reterr; 697 ap = VTOA(vp); 698 scanned++; 699 chainc++; 700 nextbn = ap->hashf; 701 702 /* 703 * check for end of chain. 704 */ 705 if (nextbn == 0) { 706 pap->tabi[hashi] = chainc; 707 hashi++; 708 chainc = 0; 709 } else if (pap->tabi[hashi] <= 0 && 710 -chainc < pap->tabi[hashi]) 711 pap->tabi[hashi] = -chainc; 712 713 if (useri >= scanned) { 714 vput(vp); 715 ap = NULL; 716 } 717 } while (ap == NULL && nextbn != 0); 718 719 /* 720 * we left the loop but without a result so do main over. 721 */ 722 if (ap == NULL) 723 continue; 724 /* 725 * Fill in dirent record 726 */ 727 memset(adp, 0, sizeof(struct adirent)); 728 adp->fileno = ap->block; 729 /* 730 * this deserves an function in kern/vfs_subr.c 731 */ 732 switch (ATOV(ap)->v_type) { 733 case VREG: 734 adp->type = DT_REG; 735 break; 736 case VDIR: 737 adp->type = DT_DIR; 738 break; 739 case VLNK: 740 adp->type = DT_LNK; 741 break; 742 default: 743 adp->type = DT_UNKNOWN; 744 break; 745 } 746 adp->reclen = sizeof(struct adirent); 747 adp->namlen = strlen(ap->name); 748 memcpy(adp->name, ap->name, adp->namlen); 749 vput(vp); 750 751 error = uiomove(adp, sizeof(struct adirent), uio); 752 if (error) 753 break; 754 if (sp->a_ncookies) { 755 *cookies++ = uoff; 756 ncookies++; 757 } 758 uoff += sizeof(struct adirent); 759 useri++; 760 uavail--; 761 } 762 #if doesnt_uiomove_handle_this 763 uio->uio_offset = uoff; 764 #endif 765 reterr: 766 #ifdef ADOSFS_DIAGNOSTIC 767 printf(" %d)", error); 768 #endif 769 if (sp->a_ncookies) { 770 if (error) { 771 free(*sp->a_cookies, M_TEMP); 772 *sp->a_ncookies = 0; 773 *sp->a_cookies = NULL; 774 } else 775 *sp->a_ncookies = ncookies; 776 } 777 return(error); 778 } 779 780 781 int 782 adosfs_access(v) 783 void *v; 784 { 785 struct vop_access_args /* { 786 struct vnode *a_vp; 787 int a_mode; 788 struct ucred *a_cred; 789 struct proc *a_p; 790 } */ *sp = v; 791 struct anode *ap; 792 struct vnode *vp = sp->a_vp; 793 int error; 794 795 #ifdef ADOSFS_DIAGNOSTIC 796 advopprint(sp); 797 #endif 798 799 ap = VTOA(vp); 800 #ifdef DIAGNOSTIC 801 if (!VOP_ISLOCKED(vp)) { 802 vprint("adosfs_access: not locked", sp->a_vp); 803 panic("adosfs_access: not locked"); 804 } 805 #endif 806 /* 807 * Disallow write attempts unless the file is a socket, 808 * fifo, or a block or character device resident on the 809 * file system. 810 */ 811 if (sp->a_mode & VWRITE) { 812 switch (vp->v_type) { 813 case VDIR: 814 case VLNK: 815 case VREG: 816 return (EROFS); 817 default: 818 break; 819 } 820 } 821 #ifdef QUOTA 822 #endif 823 error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask, 824 ap->uid, ap->gid, sp->a_mode, sp->a_cred); 825 #ifdef ADOSFS_DIAGNOSTIC 826 printf(" %d)", error); 827 #endif 828 return(error); 829 } 830 831 int 832 adosfs_readlink(v) 833 void *v; 834 { 835 struct vop_readlink_args /* { 836 struct vnode *a_vp; 837 struct uio *a_uio; 838 struct ucred *a_cred; 839 } */ *sp = v; 840 struct anode *ap; 841 int error; 842 843 #ifdef ADOSFS_DIAGNOSTIC 844 advopprint(sp); 845 #endif 846 ap = VTOA(sp->a_vp); 847 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio); 848 #ifdef ADOSFS_DIAGNOSTIC 849 printf(" %d)", error); 850 #endif 851 return (error); 852 } 853 854 /*ARGSUSED*/ 855 int 856 adosfs_inactive(v) 857 void *v; 858 { 859 struct vop_inactive_args /* { 860 struct vnode *a_vp; 861 struct proc *a_p; 862 } */ *sp = v; 863 struct vnode *vp = sp->a_vp; 864 struct proc *p = sp->a_p; 865 #ifdef ADOSFS_DIAGNOSTIC 866 advopprint(sp); 867 #endif 868 VOP_UNLOCK(vp, 0); 869 /* XXX this needs to check if file was deleted */ 870 vrecycle(vp, NULL, p); 871 872 #ifdef ADOSFS_DIAGNOSTIC 873 printf(" 0)"); 874 #endif 875 return(0); 876 } 877 878 /* 879 * the kernel wants its vnode back. 880 * no lock needed we are being called from vclean() 881 */ 882 int 883 adosfs_reclaim(v) 884 void *v; 885 { 886 struct vop_reclaim_args /* { 887 struct vnode *a_vp; 888 } */ *sp = v; 889 struct vnode *vp; 890 struct anode *ap; 891 892 #ifdef ADOSFS_DIAGNOSTIC 893 printf("(reclaim 0)"); 894 #endif 895 vp = sp->a_vp; 896 ap = VTOA(vp); 897 LIST_REMOVE(ap, link); 898 cache_purge(vp); 899 if (vp->v_type == VDIR && ap->tab) 900 free(ap->tab, M_ANODE); 901 else if (vp->v_type == VLNK && ap->slinkto) 902 free(ap->slinkto, M_ANODE); 903 pool_put(&adosfs_node_pool, ap); 904 vp->v_data = NULL; 905 return(0); 906 } 907 908 /* 909 * POSIX pathconf info, grabbed from kern/u fs, probably need to 910 * investigate exactly what each return type means as they are probably 911 * not valid currently 912 */ 913 int 914 adosfs_pathconf(v) 915 void *v; 916 { 917 struct vop_pathconf_args /* { 918 struct vnode *a_vp; 919 int a_name; 920 register_t *a_retval; 921 } */ *ap = v; 922 923 switch (ap->a_name) { 924 case _PC_LINK_MAX: 925 *ap->a_retval = LINK_MAX; 926 return (0); 927 case _PC_NAME_MAX: 928 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 929 return (0); 930 case _PC_PATH_MAX: 931 *ap->a_retval = PATH_MAX; 932 return (0); 933 case _PC_PIPE_BUF: 934 *ap->a_retval = PIPE_BUF; 935 return (0); 936 case _PC_CHOWN_RESTRICTED: 937 *ap->a_retval = 1; 938 return (0); 939 case _PC_VDISABLE: 940 *ap->a_retval = _POSIX_VDISABLE; 941 return (0); 942 case _PC_SYNC_IO: 943 *ap->a_retval = 1; 944 return (0); 945 case _PC_FILESIZEBITS: 946 *ap->a_retval = 32; 947 return (0); 948 default: 949 return (EINVAL); 950 } 951 /* NOTREACHED */ 952 } 953
Indexes created Wed Oct 22 00:09:40 GMT 2025