advnops.c revision 1.33
1 /* $NetBSD: advnops.c,v 1.33 2009/03/14 21:04:23 dsl 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 1.33 2009/03/14 21:04:23 dsl Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/vnode.h> 40 #include <sys/mount.h> 41 #include <sys/time.h> 42 #include <sys/queue.h> 43 #include <sys/namei.h> 44 #include <sys/buf.h> 45 #include <sys/dirent.h> 46 #include <sys/inttypes.h> 47 #include <sys/malloc.h> 48 #include <sys/pool.h> 49 #include <sys/stat.h> 50 #include <sys/unistd.h> 51 #include <sys/proc.h> 52 #include <sys/kauth.h> 53 54 #include <miscfs/genfs/genfs.h> 55 #include <miscfs/specfs/specdev.h> 56 #include <fs/adosfs/adosfs.h> 57 58 extern struct vnodeops adosfs_vnodeops; 59 60 #define adosfs_open genfs_nullop 61 int adosfs_getattr(void *); 62 int adosfs_read(void *); 63 int adosfs_write(void *); 64 #define adosfs_fcntl genfs_fcntl 65 #define adosfs_ioctl genfs_enoioctl 66 #define adosfs_poll genfs_poll 67 int adosfs_strategy(void *); 68 int adosfs_link(void *); 69 int adosfs_symlink(void *); 70 #define adosfs_abortop genfs_abortop 71 int adosfs_bmap(void *); 72 int adosfs_print(void *); 73 int adosfs_readdir(void *); 74 int adosfs_access(void *); 75 int adosfs_readlink(void *); 76 int adosfs_inactive(void *); 77 int adosfs_reclaim(void *); 78 int adosfs_pathconf(void *); 79 80 #define adosfs_close genfs_nullop 81 #define adosfs_fsync genfs_nullop 82 #define adosfs_seek genfs_seek 83 84 #define adosfs_advlock genfs_einval 85 #define adosfs_bwrite genfs_eopnotsupp 86 #define adosfs_create genfs_eopnotsupp 87 #define adosfs_mkdir genfs_eopnotsupp 88 #define adosfs_mknod genfs_eopnotsupp 89 #define adosfs_revoke genfs_revoke 90 #define adosfs_mmap genfs_mmap 91 #define adosfs_remove genfs_eopnotsupp 92 #define adosfs_rename genfs_eopnotsupp 93 #define adosfs_rmdir genfs_eopnotsupp 94 #define adosfs_setattr genfs_eopnotsupp 95 96 const struct vnodeopv_entry_desc adosfs_vnodeop_entries[] = { 97 { &vop_default_desc, vn_default_error }, 98 { &vop_lookup_desc, adosfs_lookup }, /* lookup */ 99 { &vop_create_desc, adosfs_create }, /* create */ 100 { &vop_mknod_desc, adosfs_mknod }, /* mknod */ 101 { &vop_open_desc, adosfs_open }, /* open */ 102 { &vop_close_desc, adosfs_close }, /* close */ 103 { &vop_access_desc, adosfs_access }, /* access */ 104 { &vop_getattr_desc, adosfs_getattr }, /* getattr */ 105 { &vop_setattr_desc, adosfs_setattr }, /* setattr */ 106 { &vop_read_desc, adosfs_read }, /* read */ 107 { &vop_write_desc, adosfs_write }, /* write */ 108 { &vop_fcntl_desc, adosfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, adosfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, adosfs_poll }, /* poll */ 111 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 112 { &vop_revoke_desc, adosfs_revoke }, /* revoke */ 113 { &vop_mmap_desc, adosfs_mmap }, /* mmap */ 114 { &vop_fsync_desc, adosfs_fsync }, /* fsync */ 115 { &vop_seek_desc, adosfs_seek }, /* seek */ 116 { &vop_remove_desc, adosfs_remove }, /* remove */ 117 { &vop_link_desc, adosfs_link }, /* link */ 118 { &vop_rename_desc, adosfs_rename }, /* rename */ 119 { &vop_mkdir_desc, adosfs_mkdir }, /* mkdir */ 120 { &vop_rmdir_desc, adosfs_rmdir }, /* rmdir */ 121 { &vop_symlink_desc, adosfs_symlink }, /* symlink */ 122 { &vop_readdir_desc, adosfs_readdir }, /* readdir */ 123 { &vop_readlink_desc, adosfs_readlink }, /* readlink */ 124 { &vop_abortop_desc, adosfs_abortop }, /* abortop */ 125 { &vop_inactive_desc, adosfs_inactive }, /* inactive */ 126 { &vop_reclaim_desc, adosfs_reclaim }, /* reclaim */ 127 { &vop_lock_desc, genfs_lock }, /* lock */ 128 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 129 { &vop_bmap_desc, adosfs_bmap }, /* bmap */ 130 { &vop_strategy_desc, adosfs_strategy }, /* strategy */ 131 { &vop_print_desc, adosfs_print }, /* print */ 132 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 133 { &vop_pathconf_desc, adosfs_pathconf }, /* pathconf */ 134 { &vop_advlock_desc, adosfs_advlock }, /* advlock */ 135 { &vop_bwrite_desc, adosfs_bwrite }, /* bwrite */ 136 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 137 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 138 { NULL, NULL } 139 }; 140 141 const struct vnodeopv_desc adosfs_vnodeop_opv_desc = 142 { &adosfs_vnodeop_p, adosfs_vnodeop_entries }; 143 144 int 145 adosfs_getattr(void *v) 146 { 147 struct vop_getattr_args /* { 148 struct vnode *a_vp; 149 struct vattr *a_vap; 150 kauth_cred_t a_cred; 151 } */ *sp = v; 152 struct vattr *vap; 153 struct adosfsmount *amp; 154 struct anode *ap; 155 u_long fblks; 156 157 #ifdef ADOSFS_DIAGNOSTIC 158 advopprint(sp); 159 #endif 160 vap = sp->a_vap; 161 ap = VTOA(sp->a_vp); 162 amp = ap->amp; 163 vattr_null(vap); 164 vap->va_uid = ap->uid; 165 vap->va_gid = ap->gid; 166 vap->va_fsid = sp->a_vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 167 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = vap->va_ctime.tv_sec = 168 ap->mtime.days * 24 * 60 * 60 + ap->mtime.mins * 60 + 169 ap->mtime.ticks / 50 + (8 * 365 + 2) * 24 * 60 * 60; 170 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = vap->va_ctime.tv_nsec = 0; 171 vap->va_gen = 0; 172 vap->va_flags = 0; 173 vap->va_rdev = NODEV; 174 vap->va_fileid = ap->block; 175 vap->va_type = sp->a_vp->v_type; 176 vap->va_mode = adunixprot(ap->adprot) & amp->mask; 177 if (sp->a_vp->v_type == VDIR) { 178 vap->va_nlink = 1; /* XXX bogus, oh well */ 179 vap->va_bytes = amp->bsize; 180 vap->va_size = amp->bsize; 181 } else { 182 /* 183 * XXX actually we can track this if we were to walk the list 184 * of links if it exists. 185 * XXX for now, just set nlink to 2 if this is a hard link 186 * to a file, or a file with a hard link. 187 */ 188 vap->va_nlink = 1 + (ap->linkto != 0); 189 /* 190 * round up to nearest blocks add number of file list 191 * blocks needed and mutiply by number of bytes per block. 192 */ 193 fblks = howmany(ap->fsize, amp->dbsize); 194 fblks += howmany(fblks, ANODENDATBLKENT(ap)); 195 vap->va_bytes = fblks * amp->dbsize; 196 vap->va_size = ap->fsize; 197 198 vap->va_blocksize = amp->dbsize; 199 } 200 #ifdef ADOSFS_DIAGNOSTIC 201 printf(" 0)"); 202 #endif 203 return(0); 204 } 205 /* 206 * are things locked??? they need to be to avoid this being 207 * deleted or changed (data block pointer blocks moving about.) 208 */ 209 int 210 adosfs_read(void *v) 211 { 212 struct vop_read_args /* { 213 struct vnode *a_vp; 214 struct uio *a_uio; 215 int a_ioflag; 216 kauth_cred_t a_cred; 217 } */ *sp = v; 218 struct vnode *vp = sp->a_vp; 219 struct adosfsmount *amp; 220 struct anode *ap; 221 struct uio *uio; 222 struct buf *bp; 223 daddr_t lbn; 224 int size, diff, error; 225 long n, on; 226 227 #ifdef ADOSFS_DIAGNOSTIC 228 advopprint(sp); 229 #endif 230 error = 0; 231 uio = sp->a_uio; 232 ap = VTOA(sp->a_vp); 233 amp = ap->amp; 234 /* 235 * Return EOF for character devices, EIO for others 236 */ 237 if (sp->a_vp->v_type != VREG) { 238 error = EIO; 239 goto reterr; 240 } 241 if (uio->uio_resid == 0) 242 goto reterr; 243 if (uio->uio_offset < 0) { 244 error = EINVAL; 245 goto reterr; 246 } 247 248 /* 249 * to expensive to let general algorithm figure out that 250 * we are beyond the file. Do it now. 251 */ 252 if (uio->uio_offset >= ap->fsize) 253 goto reterr; 254 255 /* 256 * taken from ufs_read() 257 */ 258 259 if (vp->v_type == VREG && IS_FFS(amp)) { 260 const int advice = IO_ADV_DECODE(sp->a_ioflag); 261 error = 0; 262 263 while (uio->uio_resid > 0) { 264 vsize_t bytelen = MIN(ap->fsize - uio->uio_offset, 265 uio->uio_resid); 266 267 if (bytelen == 0) { 268 break; 269 } 270 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 271 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 272 if (error) { 273 break; 274 } 275 } 276 goto out; 277 } 278 279 do { 280 size = amp->dbsize; 281 lbn = uio->uio_offset / size; 282 on = uio->uio_offset % size; 283 n = MIN(size - on, uio->uio_resid); 284 diff = ap->fsize - uio->uio_offset; 285 /* 286 * check for EOF 287 */ 288 if (diff <= 0) 289 return(0); 290 if (diff < n) 291 n = diff; 292 /* 293 * read ahead could possibly be worth something 294 * but not much as ados makes little attempt to 295 * make things contigous 296 */ 297 error = bread(sp->a_vp, lbn, amp->bsize, NOCRED, 0, &bp); 298 if (error) { 299 brelse(bp, 0); 300 goto reterr; 301 } 302 if (!IS_FFS(amp)) { 303 if (bp->b_resid > 0) 304 error = EIO; /* OFS needs the complete block */ 305 else if (adoswordn(bp, 0) != BPT_DATA) { 306 #ifdef DIAGNOSTIC 307 printf("adosfs: bad primary type blk %" PRId64 "\n", 308 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 309 #endif 310 error = EINVAL; 311 } else if (adoscksum(bp, ap->nwords)) { 312 #ifdef DIAGNOSTIC 313 printf("adosfs: blk %" PRId64 " failed cksum.\n", 314 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 315 #endif 316 error = EINVAL; 317 } 318 } 319 320 if (error) { 321 brelse(bp, 0); 322 goto reterr; 323 } 324 #ifdef ADOSFS_DIAGNOSTIC 325 printf(" %" PRId64 "+%ld-%" PRId64 "+%ld", lbn, on, lbn, n); 326 #endif 327 n = MIN(n, size - bp->b_resid); 328 error = uiomove((char *)bp->b_data + on + 329 amp->bsize - amp->dbsize, (int)n, uio); 330 brelse(bp, 0); 331 } while (error == 0 && uio->uio_resid > 0 && n != 0); 332 333 out: 334 reterr: 335 #ifdef ADOSFS_DIAGNOSTIC 336 printf(" %d)", error); 337 #endif 338 return(error); 339 } 340 341 int 342 adosfs_write(void *v) 343 { 344 #ifdef ADOSFS_DIAGNOSTIC 345 struct vop_write_args /* { 346 struct vnode *a_vp; 347 struct uio *a_uio; 348 int a_ioflag; 349 kauth_cred_t a_cred; 350 } */ *sp = v; 351 advopprint(sp); 352 printf(" EOPNOTSUPP)"); 353 #endif 354 return(EOPNOTSUPP); 355 } 356 357 /* 358 * Just call the device strategy routine 359 */ 360 int 361 adosfs_strategy(void *v) 362 { 363 struct vop_strategy_args /* { 364 struct vnode *a_vp; 365 struct buf *a_bp; 366 } */ *sp = v; 367 struct buf *bp; 368 struct anode *ap; 369 struct vnode *vp; 370 int error; 371 372 #ifdef ADOSFS_DIAGNOSTIC 373 advopprint(sp); 374 #endif 375 bp = sp->a_bp; 376 if (bp->b_vp == NULL) { 377 bp->b_error = EIO; 378 biodone(bp); 379 error = EIO; 380 goto reterr; 381 } 382 vp = sp->a_vp; 383 ap = VTOA(vp); 384 if (bp->b_blkno == bp->b_lblkno) { 385 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 386 if (error) { 387 bp->b_flags = error; 388 biodone(bp); 389 goto reterr; 390 } 391 } 392 if ((long)bp->b_blkno == -1) { 393 biodone(bp); 394 error = 0; 395 goto reterr; 396 } 397 vp = ap->amp->devvp; 398 error = VOP_STRATEGY(vp, bp); 399 reterr: 400 #ifdef ADOSFS_DIAGNOSTIC 401 printf(" %d)", error); 402 #endif 403 return(error); 404 } 405 406 int 407 adosfs_link(void *v) 408 { 409 struct vop_link_args /* { 410 struct vnode *a_dvp; 411 struct vnode *a_vp; 412 struct componentname *a_cnp; 413 } */ *ap = v; 414 415 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 416 vput(ap->a_dvp); 417 return (EROFS); 418 } 419 420 int 421 adosfs_symlink(void *v) 422 { 423 struct vop_symlink_args /* { 424 struct vnode *a_dvp; 425 struct vnode **a_vpp; 426 struct componentname *a_cnp; 427 struct vattr *a_vap; 428 char *a_target; 429 } */ *ap = v; 430 431 VOP_ABORTOP(ap->a_dvp, ap->a_cnp); 432 vput(ap->a_dvp); 433 return (EROFS); 434 } 435 436 /* 437 * Wait until the vnode has finished changing state. 438 */ 439 int 440 adosfs_bmap(void *v) 441 { 442 struct vop_bmap_args /* { 443 struct vnode *a_vp; 444 daddr_t a_bn; 445 struct vnode **a_vpp; 446 daddr_t *a_bnp; 447 int *a_runp; 448 } */ *sp = v; 449 struct anode *ap; 450 struct buf *flbp; 451 long nb, flblk, flblkoff, fcnt; 452 daddr_t *bnp; 453 daddr_t bn; 454 int error; 455 456 #ifdef ADOSFS_DIAGNOSTIC 457 advopprint(sp); 458 #endif 459 ap = VTOA(sp->a_vp); 460 bn = sp->a_bn; 461 bnp = sp->a_bnp; 462 if (sp->a_runp) { 463 *sp->a_runp = 0; 464 } 465 error = 0; 466 467 if (sp->a_vpp != NULL) 468 *sp->a_vpp = ap->amp->devvp; 469 if (bnp == NULL) 470 goto reterr; 471 if (bn < 0) { 472 error = EFBIG; 473 goto reterr; 474 } 475 if (sp->a_vp->v_type != VREG) { 476 error = EINVAL; 477 goto reterr; 478 } 479 480 /* 481 * walk the chain of file list blocks until we find 482 * the one that will yield the block pointer we need. 483 */ 484 if (ap->type == AFILE) 485 nb = ap->block; /* pointer to ourself */ 486 else if (ap->type == ALFILE) 487 nb = ap->linkto; /* pointer to real file */ 488 else { 489 error = EINVAL; 490 goto reterr; 491 } 492 493 flblk = bn / ANODENDATBLKENT(ap); 494 flbp = NULL; 495 496 /* 497 * check last indirect block cache 498 */ 499 if (flblk < ap->lastlindblk) 500 fcnt = 0; 501 else { 502 flblk -= ap->lastlindblk; 503 fcnt = ap->lastlindblk; 504 nb = ap->lastindblk; 505 } 506 while (flblk >= 0) { 507 if (flbp) 508 brelse(flbp, 0); 509 if (nb == 0) { 510 #ifdef DIAGNOSTIC 511 printf("adosfs: bad file list chain.\n"); 512 #endif 513 error = EINVAL; 514 goto reterr; 515 } 516 error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE, 517 ap->amp->bsize, NOCRED, 0, &flbp); 518 if (error) { 519 brelse(flbp, 0); 520 goto reterr; 521 } 522 if (adoscksum(flbp, ap->nwords)) { 523 #ifdef DIAGNOSTIC 524 printf("adosfs: blk %ld failed cksum.\n", nb); 525 #endif 526 brelse(flbp, 0); 527 error = EINVAL; 528 goto reterr; 529 } 530 /* 531 * update last indirect block cache 532 */ 533 ap->lastlindblk = fcnt++; 534 ap->lastindblk = nb; 535 536 nb = adoswordn(flbp, ap->nwords - 2); 537 flblk--; 538 } 539 /* 540 * calculate offset of block number in table. The table starts 541 * at nwords - 51 and goes to offset 6 or less if indicated by the 542 * valid table entries stored at offset ADBI_NBLKTABENT. 543 */ 544 flblkoff = bn % ANODENDATBLKENT(ap); 545 if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) { 546 flblkoff = (ap->nwords - 51) - flblkoff; 547 *bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE; 548 } else { 549 #ifdef DIAGNOSTIC 550 printf("flblk offset %ld too large in lblk %ld blk %" PRId64 "\n", 551 flblkoff, (long)bn, flbp->b_blkno); 552 #endif 553 error = EINVAL; 554 } 555 brelse(flbp, 0); 556 reterr: 557 #ifdef ADOSFS_DIAGNOSTIC 558 if (error == 0 && bnp) 559 printf(" %lld => %lld", (long long)bn, (long long)*bnp); 560 printf(" %d)\n", error); 561 #endif 562 return(error); 563 } 564 565 /* 566 * Print out the contents of a adosfs vnode. 567 */ 568 /* ARGSUSED */ 569 int 570 adosfs_print(void *v) 571 { 572 #if 0 573 struct vop_print_args /* { 574 struct vnode *a_vp; 575 } */ *sp = v; 576 #endif 577 return(0); 578 } 579 580 int 581 adosfs_readdir(void *v) 582 { 583 struct vop_readdir_args /* { 584 struct vnode *a_vp; 585 struct uio *a_uio; 586 kauth_cred_t a_cred; 587 int *a_eofflag; 588 off_t **a_cookies; 589 int *a_ncookies; 590 } */ *sp = v; 591 int error, first, useri, chainc, hashi, scanned; 592 u_long nextbn; 593 struct dirent ad, *adp; 594 struct anode *pap, *ap; 595 struct vnode *vp; 596 struct uio *uio = sp->a_uio; 597 off_t uoff = uio->uio_offset; 598 off_t *cookies = NULL; 599 int ncookies = 0; 600 601 #ifdef ADOSFS_DIAGNOSTIC 602 advopprint(sp); 603 #endif 604 605 if (sp->a_vp->v_type != VDIR) { 606 error = ENOTDIR; 607 goto reterr; 608 } 609 610 if (uoff < 0) { 611 error = EINVAL; 612 goto reterr; 613 } 614 615 pap = VTOA(sp->a_vp); 616 adp = &ad; 617 error = nextbn = hashi = chainc = scanned = 0; 618 first = useri = uoff / sizeof ad; 619 620 /* 621 * If offset requested is not on a slot boundary 622 */ 623 if (uoff % sizeof ad) { 624 error = EINVAL; 625 goto reterr; 626 } 627 628 for (;;) { 629 if (hashi == pap->ntabent) { 630 *sp->a_eofflag = 1; 631 break; 632 } 633 if (pap->tab[hashi] == 0) { 634 hashi++; 635 continue; 636 } 637 if (nextbn == 0) 638 nextbn = pap->tab[hashi]; 639 640 /* 641 * First determine if we can skip this chain 642 */ 643 if (chainc == 0) { 644 int skip; 645 646 skip = useri - scanned; 647 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) { 648 scanned += pap->tabi[hashi]; 649 hashi++; 650 nextbn = 0; 651 continue; 652 } 653 } 654 655 /* 656 * Now [continue to] walk the chain 657 */ 658 ap = NULL; 659 do { 660 error = VFS_VGET(pap->amp->mp, (ino_t)nextbn, &vp); 661 if (error) 662 goto reterr; 663 ap = VTOA(vp); 664 scanned++; 665 chainc++; 666 nextbn = ap->hashf; 667 668 /* 669 * check for end of chain. 670 */ 671 if (nextbn == 0) { 672 pap->tabi[hashi] = chainc; 673 hashi++; 674 chainc = 0; 675 } else if (pap->tabi[hashi] <= 0 && 676 -chainc < pap->tabi[hashi]) 677 pap->tabi[hashi] = -chainc; 678 679 if (useri >= scanned) { 680 vput(vp); 681 ap = NULL; 682 } 683 } while (ap == NULL && nextbn != 0); 684 685 /* 686 * We left the loop but without a result so do main over. 687 */ 688 if (ap == NULL) 689 continue; 690 /* 691 * Fill in dirent record 692 */ 693 memset(adp, 0, sizeof *adp); 694 adp->d_fileno = ap->block; 695 /* 696 * This deserves a function in kern/vfs_subr.c 697 */ 698 switch (ATOV(ap)->v_type) { 699 case VREG: 700 adp->d_type = DT_REG; 701 break; 702 case VDIR: 703 adp->d_type = DT_DIR; 704 break; 705 case VLNK: 706 adp->d_type = DT_LNK; 707 break; 708 default: 709 adp->d_type = DT_UNKNOWN; 710 break; 711 } 712 adp->d_namlen = strlen(ap->name); 713 memcpy(adp->d_name, ap->name, adp->d_namlen); 714 adp->d_reclen = _DIRENT_SIZE(adp); 715 vput(vp); 716 717 if (adp->d_reclen > uio->uio_resid) { 718 if (useri == first) /* no room for even one entry */ 719 error = EINVAL; 720 break; 721 } 722 error = uiomove(adp, adp->d_reclen, uio); 723 if (error) 724 break; 725 useri++; 726 } 727 ncookies = useri - first; 728 uio->uio_offset = uoff + ncookies * sizeof ad; 729 reterr: 730 #ifdef ADOSFS_DIAGNOSTIC 731 printf(" %d)", error); 732 #endif 733 if (sp->a_ncookies != NULL) { 734 *sp->a_ncookies = ncookies; 735 if (!error) { 736 *sp->a_cookies = cookies = 737 malloc(ncookies * sizeof *cookies, M_TEMP, M_WAITOK); 738 739 while (ncookies--) { 740 uoff += sizeof ad; 741 *cookies++ = uoff; 742 } 743 } else 744 *sp->a_cookies = NULL; 745 } 746 747 return(error); 748 } 749 750 751 int 752 adosfs_access(void *v) 753 { 754 struct vop_access_args /* { 755 struct vnode *a_vp; 756 int a_mode; 757 kauth_cred_t a_cred; 758 } */ *sp = v; 759 struct anode *ap; 760 struct vnode *vp = sp->a_vp; 761 int error; 762 763 #ifdef ADOSFS_DIAGNOSTIC 764 advopprint(sp); 765 #endif 766 767 ap = VTOA(vp); 768 #ifdef DIAGNOSTIC 769 if (!VOP_ISLOCKED(vp)) { 770 vprint("adosfs_access: not locked", sp->a_vp); 771 panic("adosfs_access: not locked"); 772 } 773 #endif 774 /* 775 * Disallow write attempts unless the file is a socket, 776 * fifo, or a block or character device resident on the 777 * file system. 778 */ 779 if (sp->a_mode & VWRITE) { 780 switch (vp->v_type) { 781 case VDIR: 782 case VLNK: 783 case VREG: 784 return (EROFS); 785 default: 786 break; 787 } 788 } 789 error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask, 790 ap->uid, ap->gid, sp->a_mode, sp->a_cred); 791 #ifdef ADOSFS_DIAGNOSTIC 792 printf(" %d)", error); 793 #endif 794 return(error); 795 } 796 797 int 798 adosfs_readlink(void *v) 799 { 800 struct vop_readlink_args /* { 801 struct vnode *a_vp; 802 struct uio *a_uio; 803 kauth_cred_t a_cred; 804 } */ *sp = v; 805 struct anode *ap; 806 int error; 807 808 #ifdef ADOSFS_DIAGNOSTIC 809 advopprint(sp); 810 #endif 811 ap = VTOA(sp->a_vp); 812 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio); 813 #ifdef ADOSFS_DIAGNOSTIC 814 printf(" %d)", error); 815 #endif 816 return (error); 817 } 818 819 /*ARGSUSED*/ 820 int 821 adosfs_inactive(void *v) 822 { 823 struct vop_inactive_args /* { 824 struct vnode *a_vp; 825 bool *a_recycle; 826 } */ *sp = v; 827 struct vnode *vp = sp->a_vp; 828 #ifdef ADOSFS_DIAGNOSTIC 829 advopprint(sp); 830 #endif 831 VOP_UNLOCK(vp, 0); 832 /* XXX this needs to check if file was deleted */ 833 *sp->a_recycle = true; 834 835 #ifdef ADOSFS_DIAGNOSTIC 836 printf(" 0)"); 837 #endif 838 return(0); 839 } 840 841 /* 842 * the kernel wants its vnode back. 843 * no lock needed we are being called from vclean() 844 */ 845 int 846 adosfs_reclaim(void *v) 847 { 848 struct vop_reclaim_args /* { 849 struct vnode *a_vp; 850 } */ *sp = v; 851 struct vnode *vp; 852 struct anode *ap; 853 854 #ifdef ADOSFS_DIAGNOSTIC 855 printf("(reclaim 0)"); 856 #endif 857 vp = sp->a_vp; 858 ap = VTOA(vp); 859 LIST_REMOVE(ap, link); 860 cache_purge(vp); 861 if (vp->v_type == VDIR && ap->tab) 862 free(ap->tab, M_ANODE); 863 else if (vp->v_type == VLNK && ap->slinkto) 864 free(ap->slinkto, M_ANODE); 865 genfs_node_destroy(vp); 866 pool_put(&adosfs_node_pool, ap); 867 vp->v_data = NULL; 868 return(0); 869 } 870 871 /* 872 * POSIX pathconf info, grabbed from kern/u fs, probably need to 873 * investigate exactly what each return type means as they are probably 874 * not valid currently 875 */ 876 int 877 adosfs_pathconf(void *v) 878 { 879 struct vop_pathconf_args /* { 880 struct vnode *a_vp; 881 int a_name; 882 register_t *a_retval; 883 } */ *ap = v; 884 885 switch (ap->a_name) { 886 case _PC_LINK_MAX: 887 *ap->a_retval = LINK_MAX; 888 return (0); 889 case _PC_NAME_MAX: 890 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 891 return (0); 892 case _PC_PATH_MAX: 893 *ap->a_retval = PATH_MAX; 894 return (0); 895 case _PC_PIPE_BUF: 896 *ap->a_retval = PIPE_BUF; 897 return (0); 898 case _PC_CHOWN_RESTRICTED: 899 *ap->a_retval = 1; 900 return (0); 901 case _PC_VDISABLE: 902 *ap->a_retval = _POSIX_VDISABLE; 903 return (0); 904 case _PC_SYNC_IO: 905 *ap->a_retval = 1; 906 return (0); 907 case _PC_FILESIZEBITS: 908 *ap->a_retval = 32; 909 return (0); 910 default: 911 return (EINVAL); 912 } 913 /* NOTREACHED */ 914 } 915
Indexes created Thu Sep 25 16:09:42 GMT 2025