advnops.c revision 1.7
1 /* $NetBSD: advnops.c,v 1.7 2004/01/25 18:06:48 hannken 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 1.7 2004/01/25 18:06:48 hannken 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 #define adosfs_vfree genfs_nullop 87 88 #define adosfs_advlock genfs_einval 89 #define adosfs_blkatoff genfs_eopnotsupp 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 #define adosfs_truncate genfs_eopnotsupp 101 #define adosfs_update genfs_nullop 102 #define adosfs_valloc genfs_eopnotsupp 103 104 const struct vnodeopv_entry_desc adosfs_vnodeop_entries[] = { 105 { &vop_default_desc, vn_default_error }, 106 { &vop_lookup_desc, adosfs_lookup }, /* lookup */ 107 { &vop_create_desc, adosfs_create }, /* create */ 108 { &vop_mknod_desc, adosfs_mknod }, /* mknod */ 109 { &vop_open_desc, adosfs_open }, /* open */ 110 { &vop_close_desc, adosfs_close }, /* close */ 111 { &vop_access_desc, adosfs_access }, /* access */ 112 { &vop_getattr_desc, adosfs_getattr }, /* getattr */ 113 { &vop_setattr_desc, adosfs_setattr }, /* setattr */ 114 { &vop_read_desc, adosfs_read }, /* read */ 115 { &vop_write_desc, adosfs_write }, /* write */ 116 { &vop_lease_desc, adosfs_lease_check }, /* lease */ 117 { &vop_fcntl_desc, adosfs_fcntl }, /* fcntl */ 118 { &vop_ioctl_desc, adosfs_ioctl }, /* ioctl */ 119 { &vop_poll_desc, adosfs_poll }, /* poll */ 120 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 121 { &vop_revoke_desc, adosfs_revoke }, /* revoke */ 122 { &vop_mmap_desc, adosfs_mmap }, /* mmap */ 123 { &vop_fsync_desc, adosfs_fsync }, /* fsync */ 124 { &vop_seek_desc, adosfs_seek }, /* seek */ 125 { &vop_remove_desc, adosfs_remove }, /* remove */ 126 { &vop_link_desc, adosfs_link }, /* link */ 127 { &vop_rename_desc, adosfs_rename }, /* rename */ 128 { &vop_mkdir_desc, adosfs_mkdir }, /* mkdir */ 129 { &vop_rmdir_desc, adosfs_rmdir }, /* rmdir */ 130 { &vop_symlink_desc, adosfs_symlink }, /* symlink */ 131 { &vop_readdir_desc, adosfs_readdir }, /* readdir */ 132 { &vop_readlink_desc, adosfs_readlink }, /* readlink */ 133 { &vop_abortop_desc, adosfs_abortop }, /* abortop */ 134 { &vop_inactive_desc, adosfs_inactive }, /* inactive */ 135 { &vop_reclaim_desc, adosfs_reclaim }, /* reclaim */ 136 { &vop_lock_desc, genfs_lock }, /* lock */ 137 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 138 { &vop_bmap_desc, adosfs_bmap }, /* bmap */ 139 { &vop_strategy_desc, adosfs_strategy }, /* strategy */ 140 { &vop_print_desc, adosfs_print }, /* print */ 141 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 142 { &vop_pathconf_desc, adosfs_pathconf }, /* pathconf */ 143 { &vop_advlock_desc, adosfs_advlock }, /* advlock */ 144 { &vop_blkatoff_desc, adosfs_blkatoff }, /* blkatoff */ 145 { &vop_valloc_desc, adosfs_valloc }, /* valloc */ 146 { &vop_vfree_desc, adosfs_vfree }, /* vfree */ 147 { &vop_truncate_desc, adosfs_truncate }, /* truncate */ 148 { &vop_update_desc, adosfs_update }, /* update */ 149 { &vop_bwrite_desc, adosfs_bwrite }, /* bwrite */ 150 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 151 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 152 { NULL, NULL } 153 }; 154 155 const struct vnodeopv_desc adosfs_vnodeop_opv_desc = 156 { &adosfs_vnodeop_p, adosfs_vnodeop_entries }; 157 158 int 159 adosfs_getattr(v) 160 void *v; 161 { 162 struct vop_getattr_args /* { 163 struct vnode *a_vp; 164 struct vattr *a_vap; 165 struct ucred *a_cred; 166 struct proc *a_p; 167 } */ *sp = v; 168 struct vattr *vap; 169 struct adosfsmount *amp; 170 struct anode *ap; 171 u_long fblks; 172 173 #ifdef ADOSFS_DIAGNOSTIC 174 advopprint(sp); 175 #endif 176 vap = sp->a_vap; 177 ap = VTOA(sp->a_vp); 178 amp = ap->amp; 179 vattr_null(vap); 180 vap->va_uid = ap->uid; 181 vap->va_gid = ap->gid; 182 vap->va_fsid = sp->a_vp->v_mount->mnt_stat.f_fsid.val[0]; 183 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = vap->va_ctime.tv_sec = 184 ap->mtime.days * 24 * 60 * 60 + ap->mtime.mins * 60 + 185 ap->mtime.ticks / 50 + (8 * 365 + 2) * 24 * 60 * 60; 186 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = vap->va_ctime.tv_nsec = 0; 187 vap->va_gen = 0; 188 vap->va_flags = 0; 189 vap->va_rdev = NODEV; 190 vap->va_fileid = ap->block; 191 vap->va_type = sp->a_vp->v_type; 192 vap->va_mode = adunixprot(ap->adprot) & amp->mask; 193 if (sp->a_vp->v_type == VDIR) { 194 vap->va_nlink = 1; /* XXX bogus, oh well */ 195 vap->va_bytes = amp->bsize; 196 vap->va_size = amp->bsize; 197 } else { 198 /* 199 * XXX actually we can track this if we were to walk the list 200 * of links if it exists. 201 * XXX for now, just set nlink to 2 if this is a hard link 202 * to a file, or a file with a hard link. 203 */ 204 vap->va_nlink = 1 + (ap->linkto != 0); 205 /* 206 * round up to nearest blocks add number of file list 207 * blocks needed and mutiply by number of bytes per block. 208 */ 209 fblks = howmany(ap->fsize, amp->dbsize); 210 fblks += howmany(fblks, ANODENDATBLKENT(ap)); 211 vap->va_bytes = fblks * amp->dbsize; 212 vap->va_size = ap->fsize; 213 214 vap->va_blocksize = amp->dbsize; 215 } 216 #ifdef ADOSFS_DIAGNOSTIC 217 printf(" 0)"); 218 #endif 219 return(0); 220 } 221 /* 222 * are things locked??? they need to be to avoid this being 223 * deleted or changed (data block pointer blocks moving about.) 224 */ 225 int 226 adosfs_read(v) 227 void *v; 228 { 229 struct vop_read_args /* { 230 struct vnode *a_vp; 231 struct uio *a_uio; 232 int a_ioflag; 233 struct ucred *a_cred; 234 } */ *sp = v; 235 struct vnode *vp = sp->a_vp; 236 struct adosfsmount *amp; 237 struct anode *ap; 238 struct uio *uio; 239 struct buf *bp; 240 daddr_t lbn; 241 int size, diff, error; 242 long n, on; 243 244 #ifdef ADOSFS_DIAGNOSTIC 245 advopprint(sp); 246 #endif 247 error = 0; 248 uio = sp->a_uio; 249 ap = VTOA(sp->a_vp); 250 amp = ap->amp; 251 /* 252 * Return EOF for character devices, EIO for others 253 */ 254 if (sp->a_vp->v_type != VREG) { 255 error = EIO; 256 goto reterr; 257 } 258 if (uio->uio_resid == 0) 259 goto reterr; 260 if (uio->uio_offset < 0) { 261 error = EINVAL; 262 goto reterr; 263 } 264 265 /* 266 * to expensive to let general algorithm figure out that 267 * we are beyond the file. Do it now. 268 */ 269 if (uio->uio_offset >= ap->fsize) 270 goto reterr; 271 272 /* 273 * taken from ufs_read() 274 */ 275 276 if (vp->v_type == VREG && IS_FFS(amp)) { 277 error = 0; 278 while (uio->uio_resid > 0) { 279 void *win; 280 vsize_t bytelen = MIN(ap->fsize - uio->uio_offset, 281 uio->uio_resid); 282 283 if (bytelen == 0) { 284 break; 285 } 286 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 287 &bytelen, UBC_READ); 288 error = uiomove(win, bytelen, uio); 289 ubc_release(win, 0); 290 if (error) { 291 break; 292 } 293 } 294 goto out; 295 } 296 297 do { 298 size = amp->dbsize; 299 lbn = uio->uio_offset / size; 300 on = uio->uio_offset % size; 301 n = MIN(size - on, uio->uio_resid); 302 diff = ap->fsize - uio->uio_offset; 303 /* 304 * check for EOF 305 */ 306 if (diff <= 0) 307 return(0); 308 if (diff < n) 309 n = diff; 310 /* 311 * read ahead could possibly be worth something 312 * but not much as ados makes little attempt to 313 * make things contigous 314 */ 315 error = bread(sp->a_vp, lbn, amp->bsize, NOCRED, &bp); 316 if (error) { 317 brelse(bp); 318 goto reterr; 319 } 320 if (!IS_FFS(amp)) { 321 if (bp->b_resid > 0) 322 error = EIO; /* OFS needs the complete block */ 323 else if (adoswordn(bp, 0) != BPT_DATA) { 324 #ifdef DIAGNOSTIC 325 printf("adosfs: bad primary type blk %" PRId64 "\n", 326 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 327 #endif 328 error = EINVAL; 329 } else if (adoscksum(bp, ap->nwords)) { 330 #ifdef DIAGNOSTIC 331 printf("adosfs: blk %" PRId64 " failed cksum.\n", 332 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 333 #endif 334 error = EINVAL; 335 } 336 } 337 338 if (error) { 339 brelse(bp); 340 goto reterr; 341 } 342 #ifdef ADOSFS_DIAGNOSTIC 343 printf(" %d+%d-%d+%d", lbn, on, lbn, n); 344 #endif 345 n = MIN(n, size - bp->b_resid); 346 error = uiomove(bp->b_data + on + 347 amp->bsize - amp->dbsize, (int)n, uio); 348 brelse(bp); 349 } while (error == 0 && uio->uio_resid > 0 && n != 0); 350 351 out: 352 reterr: 353 #ifdef ADOSFS_DIAGNOSTIC 354 printf(" %d)", error); 355 #endif 356 return(error); 357 } 358 359 int 360 adosfs_write(v) 361 void *v; 362 { 363 #ifdef ADOSFS_DIAGNOSTIC 364 struct vop_write_args /* { 365 struct vnode *a_vp; 366 struct uio *a_uio; 367 int a_ioflag; 368 struct ucred *a_cred; 369 } */ *sp = v; 370 advopprint(sp); 371 printf(" EOPNOTSUPP)"); 372 #endif 373 return(EOPNOTSUPP); 374 } 375 376 /* 377 * Just call the device strategy routine 378 */ 379 int 380 adosfs_strategy(v) 381 void *v; 382 { 383 struct vop_strategy_args /* { 384 struct buf *a_bp; 385 } */ *sp = v; 386 struct buf *bp; 387 struct anode *ap; 388 struct vnode *vp; 389 int error; 390 391 #ifdef ADOSFS_DIAGNOSTIC 392 advopprint(sp); 393 #endif 394 bp = sp->a_bp; 395 if (bp->b_vp == NULL) { 396 bp->b_flags |= B_ERROR; 397 biodone(bp); 398 error = EIO; 399 goto reterr; 400 } 401 vp = bp->b_vp; 402 ap = VTOA(vp); 403 if (bp->b_blkno == bp->b_lblkno) { 404 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 405 if (error) { 406 bp->b_flags |= B_ERROR; 407 biodone(bp); 408 goto reterr; 409 } 410 } 411 if ((long)bp->b_blkno == -1) { 412 biodone(bp); 413 error = 0; 414 goto reterr; 415 } 416 vp = ap->amp->devvp; 417 error = VOP_STRATEGY(vp, bp); 418 reterr: 419 #ifdef ADOSFS_DIAGNOSTIC 420 printf(" %d)", error); 421 #endif 422 return(error); 423 } 424 425 int 426 adosfs_link(v) 427 void *v; 428 { 429 struct vop_link_args /* { 430 struct vnode *a_dvp; 431 struct vnode *a_vp; 432 struct componentname *a_cnp; 433 } */ *ap = v; 434 435 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 436 vput(ap->a_dvp); 437 return (EROFS); 438 } 439 440 int 441 adosfs_symlink(v) 442 void *v; 443 { 444 struct vop_symlink_args /* { 445 struct vnode *a_dvp; 446 struct vnode **a_vpp; 447 struct componentname *a_cnp; 448 struct vattr *a_vap; 449 char *a_target; 450 } */ *ap = v; 451 452 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 453 vput(ap->a_dvp); 454 return (EROFS); 455 } 456 457 /* 458 * Wait until the vnode has finished changing state. 459 */ 460 int 461 adosfs_bmap(v) 462 void *v; 463 { 464 struct vop_bmap_args /* { 465 struct vnode *a_vp; 466 daddr_t a_bn; 467 struct vnode **a_vpp; 468 daddr_t *a_bnp; 469 int *a_runp; 470 } */ *sp = v; 471 struct anode *ap; 472 struct buf *flbp; 473 long nb, flblk, flblkoff, fcnt; 474 daddr_t *bnp; 475 daddr_t bn; 476 int error; 477 478 #ifdef ADOSFS_DIAGNOSTIC 479 advopprint(sp); 480 #endif 481 ap = VTOA(sp->a_vp); 482 bn = sp->a_bn; 483 bnp = sp->a_bnp; 484 if (sp->a_runp) { 485 *sp->a_runp = 0; 486 } 487 error = 0; 488 489 if (sp->a_vpp != NULL) 490 *sp->a_vpp = ap->amp->devvp; 491 if (bnp == NULL) 492 goto reterr; 493 if (bn < 0) { 494 error = EFBIG; 495 goto reterr; 496 } 497 if (sp->a_vp->v_type != VREG) { 498 error = EINVAL; 499 goto reterr; 500 } 501 502 /* 503 * walk the chain of file list blocks until we find 504 * the one that will yield the block pointer we need. 505 */ 506 if (ap->type == AFILE) 507 nb = ap->block; /* pointer to ourself */ 508 else if (ap->type == ALFILE) 509 nb = ap->linkto; /* pointer to real file */ 510 else { 511 error = EINVAL; 512 goto reterr; 513 } 514 515 flblk = bn / ANODENDATBLKENT(ap); 516 flbp = NULL; 517 518 /* 519 * check last indirect block cache 520 */ 521 if (flblk < ap->lastlindblk) 522 fcnt = 0; 523 else { 524 flblk -= ap->lastlindblk; 525 fcnt = ap->lastlindblk; 526 nb = ap->lastindblk; 527 } 528 while (flblk >= 0) { 529 if (flbp) 530 brelse(flbp); 531 if (nb == 0) { 532 #ifdef DIAGNOSTIC 533 printf("adosfs: bad file list chain.\n"); 534 #endif 535 error = EINVAL; 536 goto reterr; 537 } 538 error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE, 539 ap->amp->bsize, NOCRED, &flbp); 540 if (error) { 541 brelse(flbp); 542 goto reterr; 543 } 544 if (adoscksum(flbp, ap->nwords)) { 545 #ifdef DIAGNOSTIC 546 printf("adosfs: blk %ld failed cksum.\n", nb); 547 #endif 548 brelse(flbp); 549 error = EINVAL; 550 goto reterr; 551 } 552 /* 553 * update last indirect block cache 554 */ 555 ap->lastlindblk = fcnt++; 556 ap->lastindblk = nb; 557 558 nb = adoswordn(flbp, ap->nwords - 2); 559 flblk--; 560 } 561 /* 562 * calculate offset of block number in table. The table starts 563 * at nwords - 51 and goes to offset 6 or less if indicated by the 564 * valid table entries stored at offset ADBI_NBLKTABENT. 565 */ 566 flblkoff = bn % ANODENDATBLKENT(ap); 567 if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) { 568 flblkoff = (ap->nwords - 51) - flblkoff; 569 *bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE; 570 } else { 571 #ifdef DIAGNOSTIC 572 printf("flblk offset %ld too large in lblk %ld blk %" PRId64 "\n", 573 flblkoff, (long)bn, flbp->b_blkno); 574 #endif 575 error = EINVAL; 576 } 577 brelse(flbp); 578 reterr: 579 #ifdef ADOSFS_DIAGNOSTIC 580 if (error == 0 && bnp) 581 printf(" %lld => %lld", (long long)bn, (long long)*bnp); 582 printf(" %d)\n", error); 583 #endif 584 return(error); 585 } 586 587 /* 588 * Print out the contents of a adosfs vnode. 589 */ 590 /* ARGSUSED */ 591 int 592 adosfs_print(v) 593 void *v; 594 { 595 #if 0 596 struct vop_print_args /* { 597 struct vnode *a_vp; 598 } */ *sp = v; 599 #endif 600 return(0); 601 } 602 603 struct adirent { 604 u_long fileno; 605 u_short reclen; 606 char type; 607 char namlen; 608 char name[32]; /* maxlen of 30 plus 2 NUL's */ 609 }; 610 611 int 612 adosfs_readdir(v) 613 void *v; 614 { 615 struct vop_readdir_args /* { 616 struct vnode *a_vp; 617 struct uio *a_uio; 618 struct ucred *a_cred; 619 int *a_eofflag; 620 off_t **a_cookies; 621 int *a_ncookies; 622 } */ *sp = v; 623 int error, useri, chainc, hashi, scanned, uavail; 624 struct adirent ad, *adp; 625 struct anode *pap, *ap; 626 struct adosfsmount *amp; 627 struct vnode *vp; 628 struct uio *uio; 629 u_long nextbn; 630 off_t uoff, *cookies = NULL; 631 int ncookies = 0; 632 633 #ifdef ADOSFS_DIAGNOSTIC 634 advopprint(sp); 635 #endif 636 if (sp->a_vp->v_type != VDIR) { 637 error = ENOTDIR; 638 goto reterr; 639 } 640 641 uio = sp->a_uio; 642 uoff = uio->uio_offset; 643 if (uoff < 0) { 644 error = EINVAL; 645 goto reterr; 646 } 647 648 pap = VTOA(sp->a_vp); 649 amp = pap->amp; 650 adp = &ad; 651 error = nextbn = hashi = chainc = scanned = 0; 652 uavail = uio->uio_resid / sizeof(ad); 653 useri = uoff / sizeof(ad); 654 655 /* 656 * if no slots available or offset requested is not on a slot boundry 657 */ 658 if (uavail < 1 || uoff % sizeof(ad)) { 659 error = EINVAL; 660 goto reterr; 661 } 662 663 if (sp->a_ncookies) { 664 ncookies = 0; 665 cookies = malloc(sizeof (off_t) * uavail, M_TEMP, M_WAITOK); 666 *sp->a_cookies = cookies; 667 } 668 669 while (uavail) { 670 if (hashi == pap->ntabent) { 671 *sp->a_eofflag = 1; 672 break; 673 } 674 if (pap->tab[hashi] == 0) { 675 hashi++; 676 continue; 677 } 678 if (nextbn == 0) 679 nextbn = pap->tab[hashi]; 680 681 /* 682 * first determine if we can skip this chain 683 */ 684 if (chainc == 0) { 685 int skip; 686 687 skip = useri - scanned; 688 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) { 689 scanned += pap->tabi[hashi]; 690 hashi++; 691 nextbn = 0; 692 continue; 693 } 694 } 695 696 /* 697 * now [continue to] walk the chain 698 */ 699 ap = NULL; 700 do { 701 error = VFS_VGET(amp->mp, (ino_t)nextbn, &vp); 702 if (error) 703 goto reterr; 704 ap = VTOA(vp); 705 scanned++; 706 chainc++; 707 nextbn = ap->hashf; 708 709 /* 710 * check for end of chain. 711 */ 712 if (nextbn == 0) { 713 pap->tabi[hashi] = chainc; 714 hashi++; 715 chainc = 0; 716 } else if (pap->tabi[hashi] <= 0 && 717 -chainc < pap->tabi[hashi]) 718 pap->tabi[hashi] = -chainc; 719 720 if (useri >= scanned) { 721 vput(vp); 722 ap = NULL; 723 } 724 } while (ap == NULL && nextbn != 0); 725 726 /* 727 * we left the loop but without a result so do main over. 728 */ 729 if (ap == NULL) 730 continue; 731 /* 732 * Fill in dirent record 733 */ 734 memset(adp, 0, sizeof(struct adirent)); 735 adp->fileno = ap->block; 736 /* 737 * this deserves an function in kern/vfs_subr.c 738 */ 739 switch (ATOV(ap)->v_type) { 740 case VREG: 741 adp->type = DT_REG; 742 break; 743 case VDIR: 744 adp->type = DT_DIR; 745 break; 746 case VLNK: 747 adp->type = DT_LNK; 748 break; 749 default: 750 adp->type = DT_UNKNOWN; 751 break; 752 } 753 adp->reclen = sizeof(struct adirent); 754 adp->namlen = strlen(ap->name); 755 memcpy(adp->name, ap->name, adp->namlen); 756 vput(vp); 757 758 error = uiomove((caddr_t) adp, sizeof(struct adirent), uio); 759 if (error) 760 break; 761 if (sp->a_ncookies) { 762 *cookies++ = uoff; 763 ncookies++; 764 } 765 uoff += sizeof(struct adirent); 766 useri++; 767 uavail--; 768 } 769 #if doesnt_uiomove_handle_this 770 uio->uio_offset = uoff; 771 #endif 772 reterr: 773 #ifdef ADOSFS_DIAGNOSTIC 774 printf(" %d)", error); 775 #endif 776 if (sp->a_ncookies) { 777 if (error) { 778 free(*sp->a_cookies, M_TEMP); 779 *sp->a_ncookies = 0; 780 *sp->a_cookies = NULL; 781 } else 782 *sp->a_ncookies = ncookies; 783 } 784 return(error); 785 } 786 787 788 int 789 adosfs_access(v) 790 void *v; 791 { 792 struct vop_access_args /* { 793 struct vnode *a_vp; 794 int a_mode; 795 struct ucred *a_cred; 796 struct proc *a_p; 797 } */ *sp = v; 798 struct anode *ap; 799 struct vnode *vp = sp->a_vp; 800 int error; 801 802 #ifdef ADOSFS_DIAGNOSTIC 803 advopprint(sp); 804 #endif 805 806 ap = VTOA(vp); 807 #ifdef DIAGNOSTIC 808 if (!VOP_ISLOCKED(vp)) { 809 vprint("adosfs_access: not locked", sp->a_vp); 810 panic("adosfs_access: not locked"); 811 } 812 #endif 813 /* 814 * Disallow write attempts unless the file is a socket, 815 * fifo, or a block or character device resident on the 816 * file system. 817 */ 818 if (sp->a_mode & VWRITE) { 819 switch (vp->v_type) { 820 case VDIR: 821 case VLNK: 822 case VREG: 823 return (EROFS); 824 default: 825 break; 826 } 827 } 828 #ifdef QUOTA 829 #endif 830 error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask, 831 ap->uid, ap->gid, sp->a_mode, sp->a_cred); 832 #ifdef ADOSFS_DIAGNOSTIC 833 printf(" %d)", error); 834 #endif 835 return(error); 836 } 837 838 int 839 adosfs_readlink(v) 840 void *v; 841 { 842 struct vop_readlink_args /* { 843 struct vnode *a_vp; 844 struct uio *a_uio; 845 struct ucred *a_cred; 846 } */ *sp = v; 847 struct anode *ap; 848 int error; 849 850 #ifdef ADOSFS_DIAGNOSTIC 851 advopprint(sp); 852 #endif 853 ap = VTOA(sp->a_vp); 854 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio); 855 #ifdef ADOSFS_DIAGNOSTIC 856 printf(" %d)", error); 857 #endif 858 return (error); 859 } 860 861 /*ARGSUSED*/ 862 int 863 adosfs_inactive(v) 864 void *v; 865 { 866 struct vop_inactive_args /* { 867 struct vnode *a_vp; 868 struct proc *a_p; 869 } */ *sp = v; 870 struct vnode *vp = sp->a_vp; 871 struct proc *p = sp->a_p; 872 #ifdef ADOSFS_DIAGNOSTIC 873 advopprint(sp); 874 #endif 875 VOP_UNLOCK(vp, 0); 876 /* XXX this needs to check if file was deleted */ 877 vrecycle(vp, NULL, p); 878 879 #ifdef ADOSFS_DIAGNOSTIC 880 printf(" 0)"); 881 #endif 882 return(0); 883 } 884 885 /* 886 * the kernel wants its vnode back. 887 * no lock needed we are being called from vclean() 888 */ 889 int 890 adosfs_reclaim(v) 891 void *v; 892 { 893 struct vop_reclaim_args /* { 894 struct vnode *a_vp; 895 } */ *sp = v; 896 struct vnode *vp; 897 struct anode *ap; 898 899 #ifdef ADOSFS_DIAGNOSTIC 900 printf("(reclaim 0)"); 901 #endif 902 vp = sp->a_vp; 903 ap = VTOA(vp); 904 LIST_REMOVE(ap, link); 905 cache_purge(vp); 906 if (vp->v_type == VDIR && ap->tab) 907 free(ap->tab, M_ANODE); 908 else if (vp->v_type == VLNK && ap->slinkto) 909 free(ap->slinkto, M_ANODE); 910 pool_put(&adosfs_node_pool, ap); 911 vp->v_data = NULL; 912 return(0); 913 } 914 915 /* 916 * POSIX pathconf info, grabbed from kern/u fs, probably need to 917 * investigate exactly what each return type means as they are probably 918 * not valid currently 919 */ 920 int 921 adosfs_pathconf(v) 922 void *v; 923 { 924 struct vop_pathconf_args /* { 925 struct vnode *a_vp; 926 int a_name; 927 register_t *a_retval; 928 } */ *sp = v; 929 930 switch (sp->a_name) { 931 case _PC_LINK_MAX: 932 *sp->a_retval = LINK_MAX; 933 return (0); 934 case _PC_PIPE_BUF: 935 *sp->a_retval = PIPE_BUF; 936 return (0); 937 case _PC_CHOWN_RESTRICTED: 938 *sp->a_retval = 1; 939 return (0); 940 case _PC_VDISABLE: 941 *sp->a_retval = _POSIX_VDISABLE; 942 return (0); 943 case _PC_SYNC_IO: 944 *sp->a_retval = 1; 945 return (0); 946 case _PC_FILESIZEBITS: 947 *sp->a_retval = 32; 948 return (0); 949 default: 950 return (EINVAL); 951 } 952 /* NOTREACHED */ 953 } 954
Indexes created Tue Sep 23 07:09:52 GMT 2025