advnops.c revision 1.17
1 /* $NetBSD: advnops.c,v 1.17 2005/11/29 22:52:02 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 1.17 2005/11/29 22:52:02 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 const int advice = IO_ADV_DECODE(sp->a_ioflag); 268 error = 0; 269 270 while (uio->uio_resid > 0) { 271 void *win; 272 int flags; 273 vsize_t bytelen = MIN(ap->fsize - uio->uio_offset, 274 uio->uio_resid); 275 276 if (bytelen == 0) { 277 break; 278 } 279 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 280 &bytelen, advice, UBC_READ); 281 error = uiomove(win, bytelen, uio); 282 flags = UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0; 283 ubc_release(win, flags); 284 if (error) { 285 break; 286 } 287 } 288 goto out; 289 } 290 291 do { 292 size = amp->dbsize; 293 lbn = uio->uio_offset / size; 294 on = uio->uio_offset % size; 295 n = MIN(size - on, uio->uio_resid); 296 diff = ap->fsize - uio->uio_offset; 297 /* 298 * check for EOF 299 */ 300 if (diff <= 0) 301 return(0); 302 if (diff < n) 303 n = diff; 304 /* 305 * read ahead could possibly be worth something 306 * but not much as ados makes little attempt to 307 * make things contigous 308 */ 309 error = bread(sp->a_vp, lbn, amp->bsize, NOCRED, &bp); 310 if (error) { 311 brelse(bp); 312 goto reterr; 313 } 314 if (!IS_FFS(amp)) { 315 if (bp->b_resid > 0) 316 error = EIO; /* OFS needs the complete block */ 317 else if (adoswordn(bp, 0) != BPT_DATA) { 318 #ifdef DIAGNOSTIC 319 printf("adosfs: bad primary type blk %" PRId64 "\n", 320 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 321 #endif 322 error = EINVAL; 323 } else if (adoscksum(bp, ap->nwords)) { 324 #ifdef DIAGNOSTIC 325 printf("adosfs: blk %" PRId64 " failed cksum.\n", 326 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 327 #endif 328 error = EINVAL; 329 } 330 } 331 332 if (error) { 333 brelse(bp); 334 goto reterr; 335 } 336 #ifdef ADOSFS_DIAGNOSTIC 337 printf(" %d+%d-%d+%d", lbn, on, lbn, n); 338 #endif 339 n = MIN(n, size - bp->b_resid); 340 error = uiomove(bp->b_data + on + 341 amp->bsize - amp->dbsize, (int)n, uio); 342 brelse(bp); 343 } while (error == 0 && uio->uio_resid > 0 && n != 0); 344 345 out: 346 reterr: 347 #ifdef ADOSFS_DIAGNOSTIC 348 printf(" %d)", error); 349 #endif 350 return(error); 351 } 352 353 int 354 adosfs_write(v) 355 void *v; 356 { 357 #ifdef ADOSFS_DIAGNOSTIC 358 struct vop_write_args /* { 359 struct vnode *a_vp; 360 struct uio *a_uio; 361 int a_ioflag; 362 struct ucred *a_cred; 363 } */ *sp = v; 364 advopprint(sp); 365 printf(" EOPNOTSUPP)"); 366 #endif 367 return(EOPNOTSUPP); 368 } 369 370 /* 371 * Just call the device strategy routine 372 */ 373 int 374 adosfs_strategy(v) 375 void *v; 376 { 377 struct vop_strategy_args /* { 378 struct vnode *a_vp; 379 struct buf *a_bp; 380 } */ *sp = v; 381 struct buf *bp; 382 struct anode *ap; 383 struct vnode *vp; 384 int error; 385 386 #ifdef ADOSFS_DIAGNOSTIC 387 advopprint(sp); 388 #endif 389 bp = sp->a_bp; 390 if (bp->b_vp == NULL) { 391 bp->b_flags |= B_ERROR; 392 biodone(bp); 393 error = EIO; 394 goto reterr; 395 } 396 vp = sp->a_vp; 397 ap = VTOA(vp); 398 if (bp->b_blkno == bp->b_lblkno) { 399 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 400 if (error) { 401 bp->b_flags |= B_ERROR; 402 biodone(bp); 403 goto reterr; 404 } 405 } 406 if ((long)bp->b_blkno == -1) { 407 biodone(bp); 408 error = 0; 409 goto reterr; 410 } 411 vp = ap->amp->devvp; 412 error = VOP_STRATEGY(vp, bp); 413 reterr: 414 #ifdef ADOSFS_DIAGNOSTIC 415 printf(" %d)", error); 416 #endif 417 return(error); 418 } 419 420 int 421 adosfs_link(v) 422 void *v; 423 { 424 struct vop_link_args /* { 425 struct vnode *a_dvp; 426 struct vnode *a_vp; 427 struct componentname *a_cnp; 428 } */ *ap = v; 429 430 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 431 vput(ap->a_dvp); 432 return (EROFS); 433 } 434 435 int 436 adosfs_symlink(v) 437 void *v; 438 { 439 struct vop_symlink_args /* { 440 struct vnode *a_dvp; 441 struct vnode **a_vpp; 442 struct componentname *a_cnp; 443 struct vattr *a_vap; 444 char *a_target; 445 } */ *ap = v; 446 447 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 448 vput(ap->a_dvp); 449 return (EROFS); 450 } 451 452 /* 453 * Wait until the vnode has finished changing state. 454 */ 455 int 456 adosfs_bmap(v) 457 void *v; 458 { 459 struct vop_bmap_args /* { 460 struct vnode *a_vp; 461 daddr_t a_bn; 462 struct vnode **a_vpp; 463 daddr_t *a_bnp; 464 int *a_runp; 465 } */ *sp = v; 466 struct anode *ap; 467 struct buf *flbp; 468 long nb, flblk, flblkoff, fcnt; 469 daddr_t *bnp; 470 daddr_t bn; 471 int error; 472 473 #ifdef ADOSFS_DIAGNOSTIC 474 advopprint(sp); 475 #endif 476 ap = VTOA(sp->a_vp); 477 bn = sp->a_bn; 478 bnp = sp->a_bnp; 479 if (sp->a_runp) { 480 *sp->a_runp = 0; 481 } 482 error = 0; 483 484 if (sp->a_vpp != NULL) 485 *sp->a_vpp = ap->amp->devvp; 486 if (bnp == NULL) 487 goto reterr; 488 if (bn < 0) { 489 error = EFBIG; 490 goto reterr; 491 } 492 if (sp->a_vp->v_type != VREG) { 493 error = EINVAL; 494 goto reterr; 495 } 496 497 /* 498 * walk the chain of file list blocks until we find 499 * the one that will yield the block pointer we need. 500 */ 501 if (ap->type == AFILE) 502 nb = ap->block; /* pointer to ourself */ 503 else if (ap->type == ALFILE) 504 nb = ap->linkto; /* pointer to real file */ 505 else { 506 error = EINVAL; 507 goto reterr; 508 } 509 510 flblk = bn / ANODENDATBLKENT(ap); 511 flbp = NULL; 512 513 /* 514 * check last indirect block cache 515 */ 516 if (flblk < ap->lastlindblk) 517 fcnt = 0; 518 else { 519 flblk -= ap->lastlindblk; 520 fcnt = ap->lastlindblk; 521 nb = ap->lastindblk; 522 } 523 while (flblk >= 0) { 524 if (flbp) 525 brelse(flbp); 526 if (nb == 0) { 527 #ifdef DIAGNOSTIC 528 printf("adosfs: bad file list chain.\n"); 529 #endif 530 error = EINVAL; 531 goto reterr; 532 } 533 error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE, 534 ap->amp->bsize, NOCRED, &flbp); 535 if (error) { 536 brelse(flbp); 537 goto reterr; 538 } 539 if (adoscksum(flbp, ap->nwords)) { 540 #ifdef DIAGNOSTIC 541 printf("adosfs: blk %ld failed cksum.\n", nb); 542 #endif 543 brelse(flbp); 544 error = EINVAL; 545 goto reterr; 546 } 547 /* 548 * update last indirect block cache 549 */ 550 ap->lastlindblk = fcnt++; 551 ap->lastindblk = nb; 552 553 nb = adoswordn(flbp, ap->nwords - 2); 554 flblk--; 555 } 556 /* 557 * calculate offset of block number in table. The table starts 558 * at nwords - 51 and goes to offset 6 or less if indicated by the 559 * valid table entries stored at offset ADBI_NBLKTABENT. 560 */ 561 flblkoff = bn % ANODENDATBLKENT(ap); 562 if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) { 563 flblkoff = (ap->nwords - 51) - flblkoff; 564 *bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE; 565 } else { 566 #ifdef DIAGNOSTIC 567 printf("flblk offset %ld too large in lblk %ld blk %" PRId64 "\n", 568 flblkoff, (long)bn, flbp->b_blkno); 569 #endif 570 error = EINVAL; 571 } 572 brelse(flbp); 573 reterr: 574 #ifdef ADOSFS_DIAGNOSTIC 575 if (error == 0 && bnp) 576 printf(" %lld => %lld", (long long)bn, (long long)*bnp); 577 printf(" %d)\n", error); 578 #endif 579 return(error); 580 } 581 582 /* 583 * Print out the contents of a adosfs vnode. 584 */ 585 /* ARGSUSED */ 586 int 587 adosfs_print(v) 588 void *v; 589 { 590 #if 0 591 struct vop_print_args /* { 592 struct vnode *a_vp; 593 } */ *sp = v; 594 #endif 595 return(0); 596 } 597 598 struct adirent { 599 u_long fileno; 600 u_short reclen; 601 char type; 602 char namlen; 603 char name[ADMAXNAMELEN+2]; /* maxlen plus 2 NUL's */ 604 }; 605 606 int 607 adosfs_readdir(v) 608 void *v; 609 { 610 struct vop_readdir_args /* { 611 struct vnode *a_vp; 612 struct uio *a_uio; 613 struct ucred *a_cred; 614 int *a_eofflag; 615 off_t **a_cookies; 616 int *a_ncookies; 617 } */ *sp = v; 618 int error, useri, chainc, hashi, scanned, uavail; 619 struct adirent ad, *adp; 620 struct anode *pap, *ap; 621 struct adosfsmount *amp; 622 struct vnode *vp; 623 struct uio *uio; 624 u_long nextbn; 625 off_t uoff, *cookies = NULL; 626 int ncookies = 0; 627 628 #ifdef ADOSFS_DIAGNOSTIC 629 advopprint(sp); 630 #endif 631 if (sp->a_vp->v_type != VDIR) { 632 error = ENOTDIR; 633 goto reterr; 634 } 635 636 uio = sp->a_uio; 637 uoff = uio->uio_offset; 638 if (uoff < 0) { 639 error = EINVAL; 640 goto reterr; 641 } 642 643 pap = VTOA(sp->a_vp); 644 amp = pap->amp; 645 adp = &ad; 646 error = nextbn = hashi = chainc = scanned = 0; 647 uavail = uio->uio_resid / sizeof(ad); 648 useri = uoff / sizeof(ad); 649 650 /* 651 * if no slots available or offset requested is not on a slot boundry 652 */ 653 if (uavail < 1 || uoff % sizeof(ad)) { 654 error = EINVAL; 655 goto reterr; 656 } 657 658 if (sp->a_ncookies) { 659 ncookies = 0; 660 cookies = malloc(sizeof (off_t) * uavail, M_TEMP, M_WAITOK); 661 *sp->a_cookies = cookies; 662 } 663 664 while (uavail) { 665 if (hashi == pap->ntabent) { 666 *sp->a_eofflag = 1; 667 break; 668 } 669 if (pap->tab[hashi] == 0) { 670 hashi++; 671 continue; 672 } 673 if (nextbn == 0) 674 nextbn = pap->tab[hashi]; 675 676 /* 677 * first determine if we can skip this chain 678 */ 679 if (chainc == 0) { 680 int skip; 681 682 skip = useri - scanned; 683 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) { 684 scanned += pap->tabi[hashi]; 685 hashi++; 686 nextbn = 0; 687 continue; 688 } 689 } 690 691 /* 692 * now [continue to] walk the chain 693 */ 694 ap = NULL; 695 do { 696 error = VFS_VGET(amp->mp, (ino_t)nextbn, &vp); 697 if (error) 698 goto reterr; 699 ap = VTOA(vp); 700 scanned++; 701 chainc++; 702 nextbn = ap->hashf; 703 704 /* 705 * check for end of chain. 706 */ 707 if (nextbn == 0) { 708 pap->tabi[hashi] = chainc; 709 hashi++; 710 chainc = 0; 711 } else if (pap->tabi[hashi] <= 0 && 712 -chainc < pap->tabi[hashi]) 713 pap->tabi[hashi] = -chainc; 714 715 if (useri >= scanned) { 716 vput(vp); 717 ap = NULL; 718 } 719 } while (ap == NULL && nextbn != 0); 720 721 /* 722 * we left the loop but without a result so do main over. 723 */ 724 if (ap == NULL) 725 continue; 726 /* 727 * Fill in dirent record 728 */ 729 memset(adp, 0, sizeof(struct adirent)); 730 adp->fileno = ap->block; 731 /* 732 * this deserves an function in kern/vfs_subr.c 733 */ 734 switch (ATOV(ap)->v_type) { 735 case VREG: 736 adp->type = DT_REG; 737 break; 738 case VDIR: 739 adp->type = DT_DIR; 740 break; 741 case VLNK: 742 adp->type = DT_LNK; 743 break; 744 default: 745 adp->type = DT_UNKNOWN; 746 break; 747 } 748 adp->reclen = sizeof(struct adirent); 749 adp->namlen = strlen(ap->name); 750 memcpy(adp->name, ap->name, adp->namlen); 751 vput(vp); 752 753 error = uiomove(adp, sizeof(struct adirent), uio); 754 if (error) 755 break; 756 if (sp->a_ncookies) { 757 *cookies++ = uoff; 758 ncookies++; 759 } 760 uoff += sizeof(struct adirent); 761 useri++; 762 uavail--; 763 } 764 #if doesnt_uiomove_handle_this 765 uio->uio_offset = uoff; 766 #endif 767 reterr: 768 #ifdef ADOSFS_DIAGNOSTIC 769 printf(" %d)", error); 770 #endif 771 if (sp->a_ncookies) { 772 if (error) { 773 free(*sp->a_cookies, M_TEMP); 774 *sp->a_ncookies = 0; 775 *sp->a_cookies = NULL; 776 } else 777 *sp->a_ncookies = ncookies; 778 } 779 return(error); 780 } 781 782 783 int 784 adosfs_access(v) 785 void *v; 786 { 787 struct vop_access_args /* { 788 struct vnode *a_vp; 789 int a_mode; 790 struct ucred *a_cred; 791 struct proc *a_p; 792 } */ *sp = v; 793 struct anode *ap; 794 struct vnode *vp = sp->a_vp; 795 int error; 796 797 #ifdef ADOSFS_DIAGNOSTIC 798 advopprint(sp); 799 #endif 800 801 ap = VTOA(vp); 802 #ifdef DIAGNOSTIC 803 if (!VOP_ISLOCKED(vp)) { 804 vprint("adosfs_access: not locked", sp->a_vp); 805 panic("adosfs_access: not locked"); 806 } 807 #endif 808 /* 809 * Disallow write attempts unless the file is a socket, 810 * fifo, or a block or character device resident on the 811 * file system. 812 */ 813 if (sp->a_mode & VWRITE) { 814 switch (vp->v_type) { 815 case VDIR: 816 case VLNK: 817 case VREG: 818 return (EROFS); 819 default: 820 break; 821 } 822 } 823 #ifdef QUOTA 824 #endif 825 error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask, 826 ap->uid, ap->gid, sp->a_mode, sp->a_cred); 827 #ifdef ADOSFS_DIAGNOSTIC 828 printf(" %d)", error); 829 #endif 830 return(error); 831 } 832 833 int 834 adosfs_readlink(v) 835 void *v; 836 { 837 struct vop_readlink_args /* { 838 struct vnode *a_vp; 839 struct uio *a_uio; 840 struct ucred *a_cred; 841 } */ *sp = v; 842 struct anode *ap; 843 int error; 844 845 #ifdef ADOSFS_DIAGNOSTIC 846 advopprint(sp); 847 #endif 848 ap = VTOA(sp->a_vp); 849 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio); 850 #ifdef ADOSFS_DIAGNOSTIC 851 printf(" %d)", error); 852 #endif 853 return (error); 854 } 855 856 /*ARGSUSED*/ 857 int 858 adosfs_inactive(v) 859 void *v; 860 { 861 struct vop_inactive_args /* { 862 struct vnode *a_vp; 863 struct proc *a_p; 864 } */ *sp = v; 865 struct vnode *vp = sp->a_vp; 866 struct proc *p = sp->a_p; 867 #ifdef ADOSFS_DIAGNOSTIC 868 advopprint(sp); 869 #endif 870 VOP_UNLOCK(vp, 0); 871 /* XXX this needs to check if file was deleted */ 872 vrecycle(vp, NULL, p); 873 874 #ifdef ADOSFS_DIAGNOSTIC 875 printf(" 0)"); 876 #endif 877 return(0); 878 } 879 880 /* 881 * the kernel wants its vnode back. 882 * no lock needed we are being called from vclean() 883 */ 884 int 885 adosfs_reclaim(v) 886 void *v; 887 { 888 struct vop_reclaim_args /* { 889 struct vnode *a_vp; 890 } */ *sp = v; 891 struct vnode *vp; 892 struct anode *ap; 893 894 #ifdef ADOSFS_DIAGNOSTIC 895 printf("(reclaim 0)"); 896 #endif 897 vp = sp->a_vp; 898 ap = VTOA(vp); 899 LIST_REMOVE(ap, link); 900 cache_purge(vp); 901 if (vp->v_type == VDIR && ap->tab) 902 free(ap->tab, M_ANODE); 903 else if (vp->v_type == VLNK && ap->slinkto) 904 free(ap->slinkto, M_ANODE); 905 pool_put(&adosfs_node_pool, ap); 906 vp->v_data = NULL; 907 return(0); 908 } 909 910 /* 911 * POSIX pathconf info, grabbed from kern/u fs, probably need to 912 * investigate exactly what each return type means as they are probably 913 * not valid currently 914 */ 915 int 916 adosfs_pathconf(v) 917 void *v; 918 { 919 struct vop_pathconf_args /* { 920 struct vnode *a_vp; 921 int a_name; 922 register_t *a_retval; 923 } */ *ap = v; 924 925 switch (ap->a_name) { 926 case _PC_LINK_MAX: 927 *ap->a_retval = LINK_MAX; 928 return (0); 929 case _PC_NAME_MAX: 930 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 931 return (0); 932 case _PC_PATH_MAX: 933 *ap->a_retval = PATH_MAX; 934 return (0); 935 case _PC_PIPE_BUF: 936 *ap->a_retval = PIPE_BUF; 937 return (0); 938 case _PC_CHOWN_RESTRICTED: 939 *ap->a_retval = 1; 940 return (0); 941 case _PC_VDISABLE: 942 *ap->a_retval = _POSIX_VDISABLE; 943 return (0); 944 case _PC_SYNC_IO: 945 *ap->a_retval = 1; 946 return (0); 947 case _PC_FILESIZEBITS: 948 *ap->a_retval = 32; 949 return (0); 950 default: 951 return (EINVAL); 952 } 953 /* NOTREACHED */ 954 } 955
Indexes created Tue Sep 23 22:09:46 GMT 2025