advnops.c revision 1.2
1 /* $NetBSD: advnops.c,v 1.2 2003/01/09 18:34:41 lonewolf 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 1.2 2003/01/09 18:34:41 lonewolf 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 %ld\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 %ld 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 error = 0; 395 bp = sp->a_bp; 396 if (bp->b_vp == NULL) { 397 bp->b_flags |= B_ERROR; 398 biodone(bp); 399 error = EIO; 400 goto reterr; 401 } 402 vp = bp->b_vp; 403 ap = VTOA(vp); 404 if (bp->b_blkno == bp->b_lblkno) { 405 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 406 if (error) { 407 bp->b_flags |= B_ERROR; 408 biodone(bp); 409 goto reterr; 410 } 411 } 412 if ((long)bp->b_blkno == -1) { 413 biodone(bp); 414 error = 0; 415 goto reterr; 416 } 417 vp = ap->amp->devvp; 418 bp->b_dev = vp->v_rdev; 419 VOCALL(vp->v_op, VOFFSET(vop_strategy), sp); 420 reterr: 421 #ifdef ADOSFS_DIAGNOSTIC 422 printf(" %d)", error); 423 #endif 424 return(error); 425 } 426 427 int 428 adosfs_link(v) 429 void *v; 430 { 431 struct vop_link_args /* { 432 struct vnode *a_dvp; 433 struct vnode *a_vp; 434 struct componentname *a_cnp; 435 } */ *ap = v; 436 437 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 438 vput(ap->a_dvp); 439 return (EROFS); 440 } 441 442 int 443 adosfs_symlink(v) 444 void *v; 445 { 446 struct vop_symlink_args /* { 447 struct vnode *a_dvp; 448 struct vnode **a_vpp; 449 struct componentname *a_cnp; 450 struct vattr *a_vap; 451 char *a_target; 452 } */ *ap = v; 453 454 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 455 vput(ap->a_dvp); 456 return (EROFS); 457 } 458 459 /* 460 * Wait until the vnode has finished changing state. 461 */ 462 int 463 adosfs_bmap(v) 464 void *v; 465 { 466 struct vop_bmap_args /* { 467 struct vnode *a_vp; 468 daddr_t a_bn; 469 struct vnode **a_vpp; 470 daddr_t *a_bnp; 471 int *a_runp; 472 } */ *sp = v; 473 struct anode *ap; 474 struct buf *flbp; 475 long nb, flblk, flblkoff, fcnt; 476 daddr_t *bnp; 477 daddr_t bn; 478 int error; 479 480 #ifdef ADOSFS_DIAGNOSTIC 481 advopprint(sp); 482 #endif 483 ap = VTOA(sp->a_vp); 484 bn = sp->a_bn; 485 bnp = sp->a_bnp; 486 if (sp->a_runp) { 487 *sp->a_runp = 0; 488 } 489 error = 0; 490 491 if (sp->a_vpp != NULL) 492 *sp->a_vpp = ap->amp->devvp; 493 if (bnp == NULL) 494 goto reterr; 495 if (bn < 0) { 496 error = EFBIG; 497 goto reterr; 498 } 499 if (sp->a_vp->v_type != VREG) { 500 error = EINVAL; 501 goto reterr; 502 } 503 504 /* 505 * walk the chain of file list blocks until we find 506 * the one that will yield the block pointer we need. 507 */ 508 if (ap->type == AFILE) 509 nb = ap->block; /* pointer to ourself */ 510 else if (ap->type == ALFILE) 511 nb = ap->linkto; /* pointer to real file */ 512 else { 513 error = EINVAL; 514 goto reterr; 515 } 516 517 flblk = bn / ANODENDATBLKENT(ap); 518 flbp = NULL; 519 520 /* 521 * check last indirect block cache 522 */ 523 if (flblk < ap->lastlindblk) 524 fcnt = 0; 525 else { 526 flblk -= ap->lastlindblk; 527 fcnt = ap->lastlindblk; 528 nb = ap->lastindblk; 529 } 530 while (flblk >= 0) { 531 if (flbp) 532 brelse(flbp); 533 if (nb == 0) { 534 #ifdef DIAGNOSTIC 535 printf("adosfs: bad file list chain.\n"); 536 #endif 537 error = EINVAL; 538 goto reterr; 539 } 540 error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE, 541 ap->amp->bsize, NOCRED, &flbp); 542 if (error) { 543 brelse(flbp); 544 goto reterr; 545 } 546 if (adoscksum(flbp, ap->nwords)) { 547 #ifdef DIAGNOSTIC 548 printf("adosfs: blk %ld failed cksum.\n", nb); 549 #endif 550 brelse(flbp); 551 error = EINVAL; 552 goto reterr; 553 } 554 /* 555 * update last indirect block cache 556 */ 557 ap->lastlindblk = fcnt++; 558 ap->lastindblk = nb; 559 560 nb = adoswordn(flbp, ap->nwords - 2); 561 flblk--; 562 } 563 /* 564 * calculate offset of block number in table. The table starts 565 * at nwords - 51 and goes to offset 6 or less if indicated by the 566 * valid table entries stored at offset ADBI_NBLKTABENT. 567 */ 568 flblkoff = bn % ANODENDATBLKENT(ap); 569 if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) { 570 flblkoff = (ap->nwords - 51) - flblkoff; 571 *bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE; 572 } else { 573 #ifdef DIAGNOSTIC 574 printf("flblk offset %ld too large in lblk %ld blk %d\n", 575 flblkoff, (long)bn, flbp->b_blkno); 576 #endif 577 error = EINVAL; 578 } 579 brelse(flbp); 580 reterr: 581 #ifdef ADOSFS_DIAGNOSTIC 582 if (error == 0 && bnp) 583 printf(" %d => %d", bn, *bnp); 584 printf(" %d)\n", error); 585 #endif 586 return(error); 587 } 588 589 /* 590 * Print out the contents of a adosfs vnode. 591 */ 592 /* ARGSUSED */ 593 int 594 adosfs_print(v) 595 void *v; 596 { 597 #if 0 598 struct vop_print_args /* { 599 struct vnode *a_vp; 600 } */ *sp = v; 601 #endif 602 return(0); 603 } 604 605 struct adirent { 606 u_long fileno; 607 u_short reclen; 608 char type; 609 char namlen; 610 char name[32]; /* maxlen of 30 plus 2 NUL's */ 611 }; 612 613 int 614 adosfs_readdir(v) 615 void *v; 616 { 617 struct vop_readdir_args /* { 618 struct vnode *a_vp; 619 struct uio *a_uio; 620 struct ucred *a_cred; 621 int *a_eofflag; 622 off_t **a_cookies; 623 int *a_ncookies; 624 } */ *sp = v; 625 int error, useri, chainc, hashi, scanned, uavail; 626 struct adirent ad, *adp; 627 struct anode *pap, *ap; 628 struct adosfsmount *amp; 629 struct vnode *vp; 630 struct uio *uio; 631 u_long nextbn; 632 off_t uoff, *cookies = NULL; 633 int ncookies = 0; 634 635 #ifdef ADOSFS_DIAGNOSTIC 636 advopprint(sp); 637 #endif 638 if (sp->a_vp->v_type != VDIR) { 639 error = ENOTDIR; 640 goto reterr; 641 } 642 643 uio = sp->a_uio; 644 uoff = uio->uio_offset; 645 if (uoff < 0) { 646 error = EINVAL; 647 goto reterr; 648 } 649 650 pap = VTOA(sp->a_vp); 651 amp = pap->amp; 652 adp = &ad; 653 error = nextbn = hashi = chainc = scanned = 0; 654 uavail = uio->uio_resid / sizeof(ad); 655 useri = uoff / sizeof(ad); 656 657 /* 658 * if no slots available or offset requested is not on a slot boundry 659 */ 660 if (uavail < 1 || uoff % sizeof(ad)) { 661 error = EINVAL; 662 goto reterr; 663 } 664 665 if (sp->a_ncookies) { 666 ncookies = 0; 667 cookies = malloc(sizeof (off_t) * uavail, M_TEMP, M_WAITOK); 668 *sp->a_cookies = cookies; 669 } 670 671 while (uavail) { 672 if (hashi == pap->ntabent) { 673 *sp->a_eofflag = 1; 674 break; 675 } 676 if (pap->tab[hashi] == 0) { 677 hashi++; 678 continue; 679 } 680 if (nextbn == 0) 681 nextbn = pap->tab[hashi]; 682 683 /* 684 * first determine if we can skip this chain 685 */ 686 if (chainc == 0) { 687 int skip; 688 689 skip = useri - scanned; 690 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) { 691 scanned += pap->tabi[hashi]; 692 hashi++; 693 nextbn = 0; 694 continue; 695 } 696 } 697 698 /* 699 * now [continue to] walk the chain 700 */ 701 ap = NULL; 702 do { 703 error = VFS_VGET(amp->mp, (ino_t)nextbn, &vp); 704 if (error) 705 goto reterr; 706 ap = VTOA(vp); 707 scanned++; 708 chainc++; 709 nextbn = ap->hashf; 710 711 /* 712 * check for end of chain. 713 */ 714 if (nextbn == 0) { 715 pap->tabi[hashi] = chainc; 716 hashi++; 717 chainc = 0; 718 } else if (pap->tabi[hashi] <= 0 && 719 -chainc < pap->tabi[hashi]) 720 pap->tabi[hashi] = -chainc; 721 722 if (useri >= scanned) { 723 vput(vp); 724 ap = NULL; 725 } 726 } while (ap == NULL && nextbn != 0); 727 728 /* 729 * we left the loop but without a result so do main over. 730 */ 731 if (ap == NULL) 732 continue; 733 /* 734 * Fill in dirent record 735 */ 736 memset(adp, 0, sizeof(struct adirent)); 737 adp->fileno = ap->block; 738 /* 739 * this deserves an function in kern/vfs_subr.c 740 */ 741 switch (ATOV(ap)->v_type) { 742 case VREG: 743 adp->type = DT_REG; 744 break; 745 case VDIR: 746 adp->type = DT_DIR; 747 break; 748 case VLNK: 749 adp->type = DT_LNK; 750 break; 751 default: 752 adp->type = DT_UNKNOWN; 753 break; 754 } 755 adp->reclen = sizeof(struct adirent); 756 adp->namlen = strlen(ap->name); 757 memcpy(adp->name, ap->name, adp->namlen); 758 vput(vp); 759 760 error = uiomove((caddr_t) adp, sizeof(struct adirent), uio); 761 if (error) 762 break; 763 if (sp->a_ncookies) { 764 *cookies++ = uoff; 765 ncookies++; 766 } 767 uoff += sizeof(struct adirent); 768 useri++; 769 uavail--; 770 } 771 #if doesnt_uiomove_handle_this 772 uio->uio_offset = uoff; 773 #endif 774 reterr: 775 #ifdef ADOSFS_DIAGNOSTIC 776 printf(" %d)", error); 777 #endif 778 if (sp->a_ncookies) { 779 if (error) { 780 free(*sp->a_cookies, M_TEMP); 781 *sp->a_ncookies = 0; 782 *sp->a_cookies = NULL; 783 } else 784 *sp->a_ncookies = ncookies; 785 } 786 return(error); 787 } 788 789 790 int 791 adosfs_access(v) 792 void *v; 793 { 794 struct vop_access_args /* { 795 struct vnode *a_vp; 796 int a_mode; 797 struct ucred *a_cred; 798 struct proc *a_p; 799 } */ *sp = v; 800 struct anode *ap; 801 struct vnode *vp = sp->a_vp; 802 int error; 803 804 #ifdef ADOSFS_DIAGNOSTIC 805 advopprint(sp); 806 #endif 807 808 ap = VTOA(vp); 809 #ifdef DIAGNOSTIC 810 if (!VOP_ISLOCKED(vp)) { 811 vprint("adosfs_access: not locked", sp->a_vp); 812 panic("adosfs_access: not locked"); 813 } 814 #endif 815 /* 816 * Disallow write attempts unless the file is a socket, 817 * fifo, or a block or character device resident on the 818 * file system. 819 */ 820 if (sp->a_mode & VWRITE) { 821 switch (vp->v_type) { 822 case VDIR: 823 case VLNK: 824 case VREG: 825 return (EROFS); 826 default: 827 break; 828 } 829 } 830 #ifdef QUOTA 831 #endif 832 error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask, 833 ap->uid, ap->gid, sp->a_mode, sp->a_cred); 834 #ifdef ADOSFS_DIAGNOSTIC 835 printf(" %d)", error); 836 #endif 837 return(error); 838 } 839 840 int 841 adosfs_readlink(v) 842 void *v; 843 { 844 struct vop_readlink_args /* { 845 struct vnode *a_vp; 846 struct uio *a_uio; 847 struct ucred *a_cred; 848 } */ *sp = v; 849 struct anode *ap; 850 int error; 851 852 #ifdef ADOSFS_DIAGNOSTIC 853 advopprint(sp); 854 #endif 855 ap = VTOA(sp->a_vp); 856 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio); 857 #ifdef ADOSFS_DIAGNOSTIC 858 printf(" %d)", error); 859 #endif 860 return (error); 861 } 862 863 /*ARGSUSED*/ 864 int 865 adosfs_inactive(v) 866 void *v; 867 { 868 struct vop_inactive_args /* { 869 struct vnode *a_vp; 870 struct proc *a_p; 871 } */ *sp = v; 872 struct vnode *vp = sp->a_vp; 873 struct proc *p = sp->a_p; 874 #ifdef ADOSFS_DIAGNOSTIC 875 advopprint(sp); 876 #endif 877 VOP_UNLOCK(vp, 0); 878 /* XXX this needs to check if file was deleted */ 879 vrecycle(vp, NULL, p); 880 881 #ifdef ADOSFS_DIAGNOSTIC 882 printf(" 0)"); 883 #endif 884 return(0); 885 } 886 887 /* 888 * the kernel wants its vnode back. 889 * no lock needed we are being called from vclean() 890 */ 891 int 892 adosfs_reclaim(v) 893 void *v; 894 { 895 struct vop_reclaim_args /* { 896 struct vnode *a_vp; 897 } */ *sp = v; 898 struct vnode *vp; 899 struct anode *ap; 900 901 #ifdef ADOSFS_DIAGNOSTIC 902 printf("(reclaim 0)"); 903 #endif 904 vp = sp->a_vp; 905 ap = VTOA(vp); 906 LIST_REMOVE(ap, link); 907 cache_purge(vp); 908 if (vp->v_type == VDIR && ap->tab) 909 free(ap->tab, M_ANODE); 910 else if (vp->v_type == VLNK && ap->slinkto) 911 free(ap->slinkto, M_ANODE); 912 pool_put(&adosfs_node_pool, ap); 913 vp->v_data = NULL; 914 return(0); 915 } 916 917 /* 918 * POSIX pathconf info, grabbed from kern/u fs, probably need to 919 * investigate exactly what each return type means as they are probably 920 * not valid currently 921 */ 922 int 923 adosfs_pathconf(v) 924 void *v; 925 { 926 struct vop_pathconf_args /* { 927 struct vnode *a_vp; 928 int a_name; 929 register_t *a_retval; 930 } */ *sp = v; 931 932 switch (sp->a_name) { 933 case _PC_LINK_MAX: 934 *sp->a_retval = LINK_MAX; 935 return (0); 936 case _PC_PIPE_BUF: 937 *sp->a_retval = PIPE_BUF; 938 return (0); 939 case _PC_CHOWN_RESTRICTED: 940 *sp->a_retval = 1; 941 return (0); 942 case _PC_VDISABLE: 943 *sp->a_retval = _POSIX_VDISABLE; 944 return (0); 945 case _PC_SYNC_IO: 946 *sp->a_retval = 1; 947 return (0); 948 case _PC_FILESIZEBITS: 949 *sp->a_retval = 32; 950 return (0); 951 default: 952 return (EINVAL); 953 } 954 /* NOTREACHED */ 955 } 956
Indexes created Mon Sep 22 10:09:38 GMT 2025