advnops.c revision 1.20
1 /* $NetBSD: advnops.c,v 1.20 2006/05/15 01:29:02 christos 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 1.20 2006/05/15 01:29:02 christos 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 #include <sys/kauth.h> 56 57 #include <miscfs/genfs/genfs.h> 58 #include <miscfs/specfs/specdev.h> 59 #include <fs/adosfs/adosfs.h> 60 61 extern struct vnodeops adosfs_vnodeops; 62 63 #define adosfs_open genfs_nullop 64 int adosfs_getattr __P((void *)); 65 int adosfs_read __P((void *)); 66 int adosfs_write __P((void *)); 67 #define adosfs_fcntl genfs_fcntl 68 #define adosfs_ioctl genfs_enoioctl 69 #define adosfs_poll genfs_poll 70 int adosfs_strategy __P((void *)); 71 int adosfs_link __P((void *)); 72 int adosfs_symlink __P((void *)); 73 #define adosfs_abortop genfs_abortop 74 int adosfs_bmap __P((void *)); 75 int adosfs_print __P((void *)); 76 int adosfs_readdir __P((void *)); 77 int adosfs_access __P((void *)); 78 int adosfs_readlink __P((void *)); 79 int adosfs_inactive __P((void *)); 80 int adosfs_reclaim __P((void *)); 81 int adosfs_pathconf __P((void *)); 82 83 #define adosfs_close genfs_nullop 84 #define adosfs_fsync genfs_nullop 85 #define adosfs_lease_check genfs_lease_check 86 #define adosfs_seek genfs_seek 87 88 #define adosfs_advlock genfs_einval 89 #define adosfs_bwrite genfs_eopnotsupp 90 #define adosfs_create genfs_eopnotsupp 91 #define adosfs_mkdir genfs_eopnotsupp 92 #define adosfs_mknod genfs_eopnotsupp 93 #define adosfs_revoke genfs_revoke 94 #define adosfs_mmap genfs_mmap 95 #define adosfs_remove genfs_eopnotsupp 96 #define adosfs_rename genfs_eopnotsupp 97 #define adosfs_rmdir genfs_eopnotsupp 98 #define adosfs_setattr genfs_eopnotsupp 99 100 const struct vnodeopv_entry_desc adosfs_vnodeop_entries[] = { 101 { &vop_default_desc, vn_default_error }, 102 { &vop_lookup_desc, adosfs_lookup }, /* lookup */ 103 { &vop_create_desc, adosfs_create }, /* create */ 104 { &vop_mknod_desc, adosfs_mknod }, /* mknod */ 105 { &vop_open_desc, adosfs_open }, /* open */ 106 { &vop_close_desc, adosfs_close }, /* close */ 107 { &vop_access_desc, adosfs_access }, /* access */ 108 { &vop_getattr_desc, adosfs_getattr }, /* getattr */ 109 { &vop_setattr_desc, adosfs_setattr }, /* setattr */ 110 { &vop_read_desc, adosfs_read }, /* read */ 111 { &vop_write_desc, adosfs_write }, /* write */ 112 { &vop_lease_desc, adosfs_lease_check }, /* lease */ 113 { &vop_fcntl_desc, adosfs_fcntl }, /* fcntl */ 114 { &vop_ioctl_desc, adosfs_ioctl }, /* ioctl */ 115 { &vop_poll_desc, adosfs_poll }, /* poll */ 116 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 117 { &vop_revoke_desc, adosfs_revoke }, /* revoke */ 118 { &vop_mmap_desc, adosfs_mmap }, /* mmap */ 119 { &vop_fsync_desc, adosfs_fsync }, /* fsync */ 120 { &vop_seek_desc, adosfs_seek }, /* seek */ 121 { &vop_remove_desc, adosfs_remove }, /* remove */ 122 { &vop_link_desc, adosfs_link }, /* link */ 123 { &vop_rename_desc, adosfs_rename }, /* rename */ 124 { &vop_mkdir_desc, adosfs_mkdir }, /* mkdir */ 125 { &vop_rmdir_desc, adosfs_rmdir }, /* rmdir */ 126 { &vop_symlink_desc, adosfs_symlink }, /* symlink */ 127 { &vop_readdir_desc, adosfs_readdir }, /* readdir */ 128 { &vop_readlink_desc, adosfs_readlink }, /* readlink */ 129 { &vop_abortop_desc, adosfs_abortop }, /* abortop */ 130 { &vop_inactive_desc, adosfs_inactive }, /* inactive */ 131 { &vop_reclaim_desc, adosfs_reclaim }, /* reclaim */ 132 { &vop_lock_desc, genfs_lock }, /* lock */ 133 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 134 { &vop_bmap_desc, adosfs_bmap }, /* bmap */ 135 { &vop_strategy_desc, adosfs_strategy }, /* strategy */ 136 { &vop_print_desc, adosfs_print }, /* print */ 137 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 138 { &vop_pathconf_desc, adosfs_pathconf }, /* pathconf */ 139 { &vop_advlock_desc, adosfs_advlock }, /* advlock */ 140 { &vop_bwrite_desc, adosfs_bwrite }, /* bwrite */ 141 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 142 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 143 { NULL, NULL } 144 }; 145 146 const struct vnodeopv_desc adosfs_vnodeop_opv_desc = 147 { &adosfs_vnodeop_p, adosfs_vnodeop_entries }; 148 149 int 150 adosfs_getattr(v) 151 void *v; 152 { 153 struct vop_getattr_args /* { 154 struct vnode *a_vp; 155 struct vattr *a_vap; 156 kauth_cred_t a_cred; 157 struct lwp *a_l; 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); 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); 335 goto reterr; 336 } 337 #ifdef ADOSFS_DIAGNOSTIC 338 printf(" %d+%d-%d+%d", lbn, on, lbn, n); 339 #endif 340 n = MIN(n, size - bp->b_resid); 341 error = uiomove(bp->b_data + on + 342 amp->bsize - amp->dbsize, (int)n, uio); 343 brelse(bp); 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_flags |= B_ERROR; 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 |= B_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); 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); 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); 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); 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 struct adirent { 600 u_long fileno; 601 u_short reclen; 602 char type; 603 char namlen; 604 char name[ADMAXNAMELEN+2]; /* maxlen plus 2 NUL's */ 605 }; 606 607 int 608 adosfs_readdir(v) 609 void *v; 610 { 611 struct vop_readdir_args /* { 612 struct vnode *a_vp; 613 struct uio *a_uio; 614 kauth_cred_t a_cred; 615 int *a_eofflag; 616 off_t **a_cookies; 617 int *a_ncookies; 618 } */ *sp = v; 619 int error, useri, chainc, hashi, scanned, uavail; 620 struct adirent ad, *adp; 621 struct anode *pap, *ap; 622 struct adosfsmount *amp; 623 struct vnode *vp; 624 struct uio *uio; 625 u_long nextbn; 626 off_t uoff, *cookies = NULL; 627 int ncookies = 0; 628 629 #ifdef ADOSFS_DIAGNOSTIC 630 advopprint(sp); 631 #endif 632 if (sp->a_vp->v_type != VDIR) { 633 error = ENOTDIR; 634 goto reterr; 635 } 636 637 uio = sp->a_uio; 638 uoff = uio->uio_offset; 639 if (uoff < 0) { 640 error = EINVAL; 641 goto reterr; 642 } 643 644 pap = VTOA(sp->a_vp); 645 amp = pap->amp; 646 adp = &ad; 647 error = nextbn = hashi = chainc = scanned = 0; 648 uavail = uio->uio_resid / sizeof(ad); 649 useri = uoff / sizeof(ad); 650 651 /* 652 * if no slots available or offset requested is not on a slot boundry 653 */ 654 if (uavail < 1 || uoff % sizeof(ad)) { 655 error = EINVAL; 656 goto reterr; 657 } 658 659 if (sp->a_ncookies) { 660 ncookies = 0; 661 cookies = malloc(sizeof (off_t) * uavail, M_TEMP, M_WAITOK); 662 *sp->a_cookies = cookies; 663 } 664 665 while (uavail) { 666 if (hashi == pap->ntabent) { 667 *sp->a_eofflag = 1; 668 break; 669 } 670 if (pap->tab[hashi] == 0) { 671 hashi++; 672 continue; 673 } 674 if (nextbn == 0) 675 nextbn = pap->tab[hashi]; 676 677 /* 678 * first determine if we can skip this chain 679 */ 680 if (chainc == 0) { 681 int skip; 682 683 skip = useri - scanned; 684 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) { 685 scanned += pap->tabi[hashi]; 686 hashi++; 687 nextbn = 0; 688 continue; 689 } 690 } 691 692 /* 693 * now [continue to] walk the chain 694 */ 695 ap = NULL; 696 do { 697 error = VFS_VGET(amp->mp, (ino_t)nextbn, &vp); 698 if (error) 699 goto reterr; 700 ap = VTOA(vp); 701 scanned++; 702 chainc++; 703 nextbn = ap->hashf; 704 705 /* 706 * check for end of chain. 707 */ 708 if (nextbn == 0) { 709 pap->tabi[hashi] = chainc; 710 hashi++; 711 chainc = 0; 712 } else if (pap->tabi[hashi] <= 0 && 713 -chainc < pap->tabi[hashi]) 714 pap->tabi[hashi] = -chainc; 715 716 if (useri >= scanned) { 717 vput(vp); 718 ap = NULL; 719 } 720 } while (ap == NULL && nextbn != 0); 721 722 /* 723 * we left the loop but without a result so do main over. 724 */ 725 if (ap == NULL) 726 continue; 727 /* 728 * Fill in dirent record 729 */ 730 memset(adp, 0, sizeof(struct adirent)); 731 adp->fileno = ap->block; 732 /* 733 * this deserves an function in kern/vfs_subr.c 734 */ 735 switch (ATOV(ap)->v_type) { 736 case VREG: 737 adp->type = DT_REG; 738 break; 739 case VDIR: 740 adp->type = DT_DIR; 741 break; 742 case VLNK: 743 adp->type = DT_LNK; 744 break; 745 default: 746 adp->type = DT_UNKNOWN; 747 break; 748 } 749 adp->reclen = sizeof(struct adirent); 750 adp->namlen = strlen(ap->name); 751 memcpy(adp->name, ap->name, adp->namlen); 752 vput(vp); 753 754 error = uiomove(adp, sizeof(struct adirent), uio); 755 if (error) 756 break; 757 if (sp->a_ncookies) { 758 *cookies++ = uoff; 759 ncookies++; 760 } 761 uoff += sizeof(struct adirent); 762 useri++; 763 uavail--; 764 } 765 #if doesnt_uiomove_handle_this 766 uio->uio_offset = uoff; 767 #endif 768 reterr: 769 #ifdef ADOSFS_DIAGNOSTIC 770 printf(" %d)", error); 771 #endif 772 if (sp->a_ncookies) { 773 if (error) { 774 free(*sp->a_cookies, M_TEMP); 775 *sp->a_ncookies = 0; 776 *sp->a_cookies = NULL; 777 } else 778 *sp->a_ncookies = ncookies; 779 } 780 return(error); 781 } 782 783 784 int 785 adosfs_access(v) 786 void *v; 787 { 788 struct vop_access_args /* { 789 struct vnode *a_vp; 790 int a_mode; 791 kauth_cred_t a_cred; 792 struct lwp *a_l; 793 } */ *sp = v; 794 struct anode *ap; 795 struct vnode *vp = sp->a_vp; 796 int error; 797 798 #ifdef ADOSFS_DIAGNOSTIC 799 advopprint(sp); 800 #endif 801 802 ap = VTOA(vp); 803 #ifdef DIAGNOSTIC 804 if (!VOP_ISLOCKED(vp)) { 805 vprint("adosfs_access: not locked", sp->a_vp); 806 panic("adosfs_access: not locked"); 807 } 808 #endif 809 /* 810 * Disallow write attempts unless the file is a socket, 811 * fifo, or a block or character device resident on the 812 * file system. 813 */ 814 if (sp->a_mode & VWRITE) { 815 switch (vp->v_type) { 816 case VDIR: 817 case VLNK: 818 case VREG: 819 return (EROFS); 820 default: 821 break; 822 } 823 } 824 #ifdef QUOTA 825 #endif 826 error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask, 827 ap->uid, ap->gid, sp->a_mode, sp->a_cred); 828 #ifdef ADOSFS_DIAGNOSTIC 829 printf(" %d)", error); 830 #endif 831 return(error); 832 } 833 834 int 835 adosfs_readlink(v) 836 void *v; 837 { 838 struct vop_readlink_args /* { 839 struct vnode *a_vp; 840 struct uio *a_uio; 841 kauth_cred_t a_cred; 842 } */ *sp = v; 843 struct anode *ap; 844 int error; 845 846 #ifdef ADOSFS_DIAGNOSTIC 847 advopprint(sp); 848 #endif 849 ap = VTOA(sp->a_vp); 850 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio); 851 #ifdef ADOSFS_DIAGNOSTIC 852 printf(" %d)", error); 853 #endif 854 return (error); 855 } 856 857 /*ARGSUSED*/ 858 int 859 adosfs_inactive(v) 860 void *v; 861 { 862 struct vop_inactive_args /* { 863 struct vnode *a_vp; 864 struct lwp *a_l; 865 } */ *sp = v; 866 struct vnode *vp = sp->a_vp; 867 struct lwp *l = sp->a_l; 868 #ifdef ADOSFS_DIAGNOSTIC 869 advopprint(sp); 870 #endif 871 VOP_UNLOCK(vp, 0); 872 /* XXX this needs to check if file was deleted */ 873 vrecycle(vp, NULL, l); 874 875 #ifdef ADOSFS_DIAGNOSTIC 876 printf(" 0)"); 877 #endif 878 return(0); 879 } 880 881 /* 882 * the kernel wants its vnode back. 883 * no lock needed we are being called from vclean() 884 */ 885 int 886 adosfs_reclaim(v) 887 void *v; 888 { 889 struct vop_reclaim_args /* { 890 struct vnode *a_vp; 891 } */ *sp = v; 892 struct vnode *vp; 893 struct anode *ap; 894 895 #ifdef ADOSFS_DIAGNOSTIC 896 printf("(reclaim 0)"); 897 #endif 898 vp = sp->a_vp; 899 ap = VTOA(vp); 900 LIST_REMOVE(ap, link); 901 cache_purge(vp); 902 if (vp->v_type == VDIR && ap->tab) 903 free(ap->tab, M_ANODE); 904 else if (vp->v_type == VLNK && ap->slinkto) 905 free(ap->slinkto, M_ANODE); 906 pool_put(&adosfs_node_pool, ap); 907 vp->v_data = NULL; 908 return(0); 909 } 910 911 /* 912 * POSIX pathconf info, grabbed from kern/u fs, probably need to 913 * investigate exactly what each return type means as they are probably 914 * not valid currently 915 */ 916 int 917 adosfs_pathconf(v) 918 void *v; 919 { 920 struct vop_pathconf_args /* { 921 struct vnode *a_vp; 922 int a_name; 923 register_t *a_retval; 924 } */ *ap = v; 925 926 switch (ap->a_name) { 927 case _PC_LINK_MAX: 928 *ap->a_retval = LINK_MAX; 929 return (0); 930 case _PC_NAME_MAX: 931 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 932 return (0); 933 case _PC_PATH_MAX: 934 *ap->a_retval = PATH_MAX; 935 return (0); 936 case _PC_PIPE_BUF: 937 *ap->a_retval = PIPE_BUF; 938 return (0); 939 case _PC_CHOWN_RESTRICTED: 940 *ap->a_retval = 1; 941 return (0); 942 case _PC_VDISABLE: 943 *ap->a_retval = _POSIX_VDISABLE; 944 return (0); 945 case _PC_SYNC_IO: 946 *ap->a_retval = 1; 947 return (0); 948 case _PC_FILESIZEBITS: 949 *ap->a_retval = 32; 950 return (0); 951 default: 952 return (EINVAL); 953 } 954 /* NOTREACHED */ 955 } 956
Indexes created Thu Sep 25 16:09:42 GMT 2025