1 /* $NetBSD: advnops.c,v 1.60 2024/05/13 00:24:18 msaitoh 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 1.60 2024/05/13 00:24:18 msaitoh 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 int adosfs_getattr(void *); 61 int adosfs_read(void *); 62 int adosfs_write(void *); 63 int adosfs_strategy(void *); 64 int adosfs_bmap(void *); 65 int adosfs_print(void *); 66 int adosfs_readdir(void *); 67 int adosfs_access(void *); 68 int adosfs_readlink(void *); 69 int adosfs_inactive(void *); 70 int adosfs_reclaim(void *); 71 int adosfs_pathconf(void *); 72 73 const struct vnodeopv_entry_desc adosfs_vnodeop_entries[] = { 74 { &vop_default_desc, vn_default_error }, 75 { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ 76 { &vop_lookup_desc, adosfs_lookup }, /* lookup */ 77 { &vop_create_desc, genfs_eopnotsupp }, /* create */ 78 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 79 { &vop_open_desc, genfs_nullop }, /* open */ 80 { &vop_close_desc, genfs_nullop }, /* close */ 81 { &vop_access_desc, adosfs_access }, /* access */ 82 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 83 { &vop_getattr_desc, adosfs_getattr }, /* getattr */ 84 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */ 85 { &vop_read_desc, adosfs_read }, /* read */ 86 { &vop_write_desc, adosfs_write }, /* write */ 87 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 88 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 89 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 90 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ 91 { &vop_poll_desc, genfs_poll }, /* poll */ 92 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 93 { &vop_revoke_desc, genfs_revoke }, /* revoke */ 94 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 95 { &vop_fsync_desc, genfs_nullop }, /* fsync */ 96 { &vop_seek_desc, genfs_seek }, /* seek */ 97 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ 98 { &vop_link_desc, genfs_erofs_link }, /* link */ 99 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ 100 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ 101 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ 102 { &vop_symlink_desc, genfs_erofs_symlink }, /* symlink */ 103 { &vop_readdir_desc, adosfs_readdir }, /* readdir */ 104 { &vop_readlink_desc, adosfs_readlink }, /* readlink */ 105 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 106 { &vop_inactive_desc, adosfs_inactive }, /* inactive */ 107 { &vop_reclaim_desc, adosfs_reclaim }, /* reclaim */ 108 { &vop_lock_desc, genfs_lock }, /* lock */ 109 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 110 { &vop_bmap_desc, adosfs_bmap }, /* bmap */ 111 { &vop_strategy_desc, adosfs_strategy }, /* strategy */ 112 { &vop_print_desc, adosfs_print }, /* print */ 113 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 114 { &vop_pathconf_desc, adosfs_pathconf }, /* pathconf */ 115 { &vop_advlock_desc, genfs_einval }, /* advlock */ 116 { &vop_bwrite_desc, genfs_eopnotsupp }, /* bwrite */ 117 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 118 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 119 { NULL, NULL } 120 }; 121 122 const struct vnodeopv_desc adosfs_vnodeop_opv_desc = 123 { &adosfs_vnodeop_p, adosfs_vnodeop_entries }; 124 125 int 126 adosfs_getattr(void *v) 127 { 128 struct vop_getattr_args /* { 129 struct vnode *a_vp; 130 struct vattr *a_vap; 131 kauth_cred_t a_cred; 132 } */ *sp = v; 133 struct vattr *vap; 134 struct adosfsmount *amp; 135 struct anode *ap; 136 u_long fblks; 137 138 #ifdef ADOSFS_DIAGNOSTIC 139 advopprint(sp); 140 #endif 141 vap = sp->a_vap; 142 ap = VTOA(sp->a_vp); 143 amp = ap->amp; 144 vattr_null(vap); 145 vap->va_uid = ap->uid; 146 vap->va_gid = ap->gid; 147 vap->va_fsid = sp->a_vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 148 vap->va_atime.tv_sec = vap->va_mtime.tv_sec = vap->va_ctime.tv_sec = 149 ap->mtime.days * 24 * 60 * 60 + ap->mtime.mins * 60 + 150 ap->mtime.ticks / 50 + (8 * 365 + 2) * 24 * 60 * 60; 151 vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = vap->va_ctime.tv_nsec = 0; 152 vap->va_gen = 0; 153 vap->va_flags = 0; 154 vap->va_rdev = NODEV; 155 vap->va_fileid = ap->block; 156 vap->va_type = sp->a_vp->v_type; 157 vap->va_mode = adunixprot(ap->adprot) & amp->mask; 158 if (sp->a_vp->v_type == VDIR) { 159 vap->va_nlink = 1; /* XXX bogus, oh well */ 160 vap->va_bytes = amp->bsize; 161 vap->va_size = amp->bsize; 162 } else { 163 /* 164 * XXX actually we can track this if we were to walk the list 165 * of links if it exists. 166 * XXX for now, just set nlink to 2 if this is a hard link 167 * to a file, or a file with a hard link. 168 */ 169 vap->va_nlink = 1 + (ap->linkto != 0); 170 /* 171 * round up to nearest blocks add number of file list 172 * blocks needed and multiply by number of bytes per block. 173 */ 174 fblks = howmany(ap->fsize, amp->dbsize); 175 fblks += howmany(fblks, ANODENDATBLKENT(ap)); 176 vap->va_bytes = fblks * amp->dbsize; 177 vap->va_size = ap->fsize; 178 179 vap->va_blocksize = amp->dbsize; 180 } 181 #ifdef ADOSFS_DIAGNOSTIC 182 printf(" 0)"); 183 #endif 184 return(0); 185 } 186 /* 187 * are things locked??? they need to be to avoid this being 188 * deleted or changed (data block pointer blocks moving about.) 189 */ 190 int 191 adosfs_read(void *v) 192 { 193 struct vop_read_args /* { 194 struct vnode *a_vp; 195 struct uio *a_uio; 196 int a_ioflag; 197 kauth_cred_t a_cred; 198 } */ *sp = v; 199 struct vnode *vp = sp->a_vp; 200 struct adosfsmount *amp; 201 struct anode *ap; 202 struct uio *uio; 203 struct buf *bp; 204 daddr_t lbn; 205 int size, diff, error; 206 long n, on; 207 208 #ifdef ADOSFS_DIAGNOSTIC 209 advopprint(sp); 210 #endif 211 error = 0; 212 uio = sp->a_uio; 213 ap = VTOA(sp->a_vp); 214 amp = ap->amp; 215 /* 216 * Return EOF for character devices, EIO for others 217 */ 218 if (sp->a_vp->v_type != VREG) { 219 error = EIO; 220 goto reterr; 221 } 222 if (uio->uio_resid == 0) 223 goto reterr; 224 if (uio->uio_offset < 0) { 225 error = EINVAL; 226 goto reterr; 227 } 228 229 /* 230 * to expensive to let general algorithm figure out that 231 * we are beyond the file. Do it now. 232 */ 233 if (uio->uio_offset >= ap->fsize) 234 goto reterr; 235 236 /* 237 * taken from ufs_read() 238 */ 239 240 if (vp->v_type == VREG && IS_FFS(amp)) { 241 const int advice = IO_ADV_DECODE(sp->a_ioflag); 242 error = 0; 243 244 while (uio->uio_resid > 0) { 245 vsize_t bytelen = MIN(ap->fsize - uio->uio_offset, 246 uio->uio_resid); 247 248 if (bytelen == 0) { 249 break; 250 } 251 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 252 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 253 if (error) { 254 break; 255 } 256 } 257 goto out; 258 } 259 260 do { 261 size = amp->dbsize; 262 lbn = uio->uio_offset / size; 263 on = uio->uio_offset % size; 264 n = MIN(size - on, uio->uio_resid); 265 diff = ap->fsize - uio->uio_offset; 266 /* 267 * check for EOF 268 */ 269 if (diff <= 0) 270 return(0); 271 if (diff < n) 272 n = diff; 273 /* 274 * read ahead could possibly be worth something 275 * but not much as ados makes little attempt to 276 * make things contiguous 277 */ 278 error = bread(sp->a_vp, lbn, amp->bsize, 0, &bp); 279 if (error) { 280 goto reterr; 281 } 282 if (!IS_FFS(amp)) { 283 if (bp->b_resid > 0) 284 error = EIO; /* OFS needs the complete block */ 285 else if (adoswordn(bp, 0) != BPT_DATA) { 286 #ifdef DIAGNOSTIC 287 printf("adosfs: bad primary type blk %" PRId64 "\n", 288 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 289 #endif 290 error = EINVAL; 291 } else if (adoscksum(bp, ap->nwords)) { 292 #ifdef DIAGNOSTIC 293 printf("adosfs: blk %" PRId64 " failed cksum.\n", 294 bp->b_blkno / (amp->bsize / DEV_BSIZE)); 295 #endif 296 error = EINVAL; 297 } 298 } 299 300 if (error) { 301 brelse(bp, 0); 302 goto reterr; 303 } 304 #ifdef ADOSFS_DIAGNOSTIC 305 printf(" %" PRId64 "+%ld-%" PRId64 "+%ld", lbn, on, lbn, n); 306 #endif 307 n = MIN(n, size - bp->b_resid); 308 error = uiomove((char *)bp->b_data + on + 309 amp->bsize - amp->dbsize, (int)n, uio); 310 brelse(bp, 0); 311 } while (error == 0 && uio->uio_resid > 0 && n != 0); 312 313 out: 314 reterr: 315 #ifdef ADOSFS_DIAGNOSTIC 316 printf(" %d)", error); 317 #endif 318 return(error); 319 } 320 321 int 322 adosfs_write(void *v) 323 { 324 #ifdef ADOSFS_DIAGNOSTIC 325 #if 0 326 struct vop_write_args /* { 327 struct vnode *a_vp; 328 struct uio *a_uio; 329 int a_ioflag; 330 kauth_cred_t a_cred; 331 } */ *sp = v; 332 advopprint(sp); 333 #endif 334 printf(" EOPNOTSUPP)"); 335 #endif 336 return(EOPNOTSUPP); 337 } 338 339 /* 340 * Just call the device strategy routine 341 */ 342 int 343 adosfs_strategy(void *v) 344 { 345 struct vop_strategy_args /* { 346 struct vnode *a_vp; 347 struct buf *a_bp; 348 } */ *sp = v; 349 struct buf *bp; 350 struct anode *ap; 351 struct vnode *vp; 352 int error; 353 354 #ifdef ADOSFS_DIAGNOSTIC 355 advopprint(sp); 356 #endif 357 bp = sp->a_bp; 358 if (bp->b_vp == NULL) { 359 bp->b_error = EIO; 360 biodone(bp); 361 error = EIO; 362 goto reterr; 363 } 364 vp = sp->a_vp; 365 ap = VTOA(vp); 366 if (bp->b_blkno == bp->b_lblkno) { 367 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); 368 if (error) { 369 bp->b_error = error; 370 biodone(bp); 371 goto reterr; 372 } 373 } 374 if ((long)bp->b_blkno == -1) { 375 biodone(bp); 376 error = 0; 377 goto reterr; 378 } 379 vp = ap->amp->devvp; 380 error = VOP_STRATEGY(vp, bp); 381 reterr: 382 #ifdef ADOSFS_DIAGNOSTIC 383 printf(" %d)", error); 384 #endif 385 return(error); 386 } 387 388 /* 389 * Wait until the vnode has finished changing state. 390 */ 391 int 392 adosfs_bmap(void *v) 393 { 394 struct vop_bmap_args /* { 395 struct vnode *a_vp; 396 daddr_t a_bn; 397 struct vnode **a_vpp; 398 daddr_t *a_bnp; 399 int *a_runp; 400 } */ *sp = v; 401 struct anode *ap; 402 struct buf *flbp; 403 long nb, flblk, flblkoff, fcnt; 404 daddr_t *bnp; 405 daddr_t bn; 406 int error; 407 408 #ifdef ADOSFS_DIAGNOSTIC 409 advopprint(sp); 410 #endif 411 ap = VTOA(sp->a_vp); 412 bn = sp->a_bn; 413 bnp = sp->a_bnp; 414 if (sp->a_runp) { 415 *sp->a_runp = 0; 416 } 417 error = 0; 418 419 if (sp->a_vpp != NULL) 420 *sp->a_vpp = ap->amp->devvp; 421 if (bnp == NULL) 422 goto reterr; 423 if (bn < 0) { 424 error = EFBIG; 425 goto reterr; 426 } 427 if (sp->a_vp->v_type != VREG) { 428 error = EINVAL; 429 goto reterr; 430 } 431 432 /* 433 * walk the chain of file list blocks until we find 434 * the one that will yield the block pointer we need. 435 */ 436 if (ap->type == AFILE) 437 nb = ap->block; /* pointer to ourself */ 438 else if (ap->type == ALFILE) 439 nb = ap->linkto; /* pointer to real file */ 440 else { 441 error = EINVAL; 442 goto reterr; 443 } 444 445 flblk = bn / ANODENDATBLKENT(ap); 446 flbp = NULL; 447 448 /* 449 * check last indirect block cache 450 */ 451 if (flblk < ap->lastlindblk) 452 fcnt = 0; 453 else { 454 flblk -= ap->lastlindblk; 455 fcnt = ap->lastlindblk; 456 nb = ap->lastindblk; 457 } 458 while (flblk >= 0) { 459 if (flbp) 460 brelse(flbp, 0); 461 if (nb == 0) { 462 #ifdef DIAGNOSTIC 463 printf("adosfs: bad file list chain.\n"); 464 #endif 465 error = EINVAL; 466 goto reterr; 467 } 468 error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE, 469 ap->amp->bsize, 0, &flbp); 470 if (error) { 471 goto reterr; 472 } 473 if (adoscksum(flbp, ap->nwords)) { 474 #ifdef DIAGNOSTIC 475 printf("adosfs: blk %ld failed cksum.\n", nb); 476 #endif 477 brelse(flbp, 0); 478 error = EINVAL; 479 goto reterr; 480 } 481 /* 482 * update last indirect block cache 483 */ 484 ap->lastlindblk = fcnt++; 485 ap->lastindblk = nb; 486 487 nb = adoswordn(flbp, ap->nwords - 2); 488 flblk--; 489 } 490 /* 491 * calculate offset of block number in table. The table starts 492 * at nwords - 51 and goes to offset 6 or less if indicated by the 493 * valid table entries stored at offset ADBI_NBLKTABENT. 494 */ 495 flblkoff = bn % ANODENDATBLKENT(ap); 496 if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) { 497 flblkoff = (ap->nwords - 51) - flblkoff; 498 *bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE; 499 } else { 500 #ifdef DIAGNOSTIC 501 printf("flblk offset %ld too large in lblk %ld blk %" PRId64 "\n", 502 flblkoff, (long)bn, flbp->b_blkno); 503 #endif 504 error = EINVAL; 505 } 506 brelse(flbp, 0); 507 reterr: 508 #ifdef ADOSFS_DIAGNOSTIC 509 if (error == 0 && bnp) 510 printf(" %lld => %lld", (long long)bn, (long long)*bnp); 511 printf(" %d)\n", error); 512 #endif 513 return(error); 514 } 515 516 /* 517 * Print out the contents of a adosfs vnode. 518 */ 519 /* ARGSUSED */ 520 int 521 adosfs_print(void *v) 522 { 523 #if 0 524 struct vop_print_args /* { 525 struct vnode *a_vp; 526 } */ *sp = v; 527 #endif 528 return(0); 529 } 530 531 int 532 adosfs_readdir(void *v) 533 { 534 struct vop_readdir_args /* { 535 struct vnode *a_vp; 536 struct uio *a_uio; 537 kauth_cred_t a_cred; 538 int *a_eofflag; 539 off_t **a_cookies; 540 int *a_ncookies; 541 } */ *sp = v; 542 int error, first, useri, chainc, hashi, scanned; 543 u_long nextbn; 544 struct dirent ad, *adp; 545 struct anode *pap, *ap; 546 struct vnode *vp; 547 struct uio *uio = sp->a_uio; 548 off_t uoff = uio->uio_offset; 549 off_t *cookies = NULL; 550 int ncookies = 0; 551 552 #ifdef ADOSFS_DIAGNOSTIC 553 advopprint(sp); 554 #endif 555 556 if (sp->a_vp->v_type != VDIR) { 557 error = ENOTDIR; 558 goto reterr; 559 } 560 561 if (uoff < 0) { 562 error = EINVAL; 563 goto reterr; 564 } 565 566 pap = VTOA(sp->a_vp); 567 adp = &ad; 568 error = nextbn = hashi = chainc = scanned = 0; 569 first = useri = uoff / sizeof ad; 570 571 /* 572 * If offset requested is not on a slot boundary 573 */ 574 if (uoff % sizeof ad) { 575 error = EINVAL; 576 goto reterr; 577 } 578 579 for (;;) { 580 if (hashi == pap->ntabent) { 581 *sp->a_eofflag = 1; 582 break; 583 } 584 if (pap->tab[hashi] == 0) { 585 hashi++; 586 continue; 587 } 588 if (nextbn == 0) 589 nextbn = pap->tab[hashi]; 590 591 /* 592 * First determine if we can skip this chain 593 */ 594 if (chainc == 0) { 595 int skip; 596 597 skip = useri - scanned; 598 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) { 599 scanned += pap->tabi[hashi]; 600 hashi++; 601 nextbn = 0; 602 continue; 603 } 604 } 605 606 /* 607 * Now [continue to] walk the chain 608 */ 609 ap = NULL; 610 do { 611 error = VFS_VGET(pap->amp->mp, (ino_t)nextbn, 612 LK_EXCLUSIVE, &vp); 613 if (error) 614 goto reterr; 615 ap = VTOA(vp); 616 scanned++; 617 chainc++; 618 nextbn = ap->hashf; 619 620 /* 621 * check for end of chain. 622 */ 623 if (nextbn == 0) { 624 pap->tabi[hashi] = chainc; 625 hashi++; 626 chainc = 0; 627 } else if (pap->tabi[hashi] <= 0 && 628 -chainc < pap->tabi[hashi]) 629 pap->tabi[hashi] = -chainc; 630 631 if (useri >= scanned) { 632 vput(vp); 633 ap = NULL; 634 } 635 } while (ap == NULL && nextbn != 0); 636 637 /* 638 * We left the loop but without a result so do main over. 639 */ 640 if (ap == NULL) 641 continue; 642 /* 643 * Fill in dirent record 644 */ 645 memset(adp, 0, sizeof *adp); 646 adp->d_fileno = ap->block; 647 /* 648 * This deserves a function in kern/vfs_subr.c 649 */ 650 switch (ATOV(ap)->v_type) { 651 case VREG: 652 adp->d_type = DT_REG; 653 break; 654 case VDIR: 655 adp->d_type = DT_DIR; 656 break; 657 case VLNK: 658 adp->d_type = DT_LNK; 659 break; 660 default: 661 adp->d_type = DT_UNKNOWN; 662 break; 663 } 664 adp->d_namlen = strlen(ap->name); 665 memcpy(adp->d_name, ap->name, adp->d_namlen); 666 adp->d_reclen = _DIRENT_SIZE(adp); 667 vput(vp); 668 669 if (adp->d_reclen > uio->uio_resid) { 670 if (useri == first) /* no room for even one entry */ 671 error = EINVAL; 672 break; 673 } 674 error = uiomove(adp, adp->d_reclen, uio); 675 if (error) 676 break; 677 useri++; 678 } 679 ncookies = useri - first; 680 uio->uio_offset = uoff + ncookies * sizeof ad; 681 reterr: 682 #ifdef ADOSFS_DIAGNOSTIC 683 printf(" %d)", error); 684 #endif 685 if (sp->a_ncookies != NULL) { 686 *sp->a_ncookies = ncookies; 687 if (!error) { 688 *sp->a_cookies = cookies = 689 malloc(ncookies * sizeof *cookies, M_TEMP, M_WAITOK); 690 691 while (ncookies--) { 692 uoff += sizeof ad; 693 *cookies++ = uoff; 694 } 695 } else 696 *sp->a_cookies = NULL; 697 } 698 699 return(error); 700 } 701 702 static int 703 adosfs_check_possible(struct vnode *vp, struct anode *ap, accmode_t accmode) 704 { 705 706 /* 707 * Disallow write attempts unless the file is a socket, 708 * fifo, or a block or character device resident on the 709 * file system. 710 */ 711 if (accmode & VWRITE) { 712 switch (vp->v_type) { 713 case VDIR: 714 case VLNK: 715 case VREG: 716 return (EROFS); 717 default: 718 break; 719 } 720 } 721 722 return 0; 723 } 724 725 static int 726 adosfs_check_permitted(struct vnode *vp, struct anode *ap, accmode_t accmode, 727 kauth_cred_t cred) 728 { 729 mode_t file_mode = adunixprot(ap->adprot) & ap->amp->mask; 730 731 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 732 vp->v_type, file_mode), vp, NULL, genfs_can_access(vp, 733 cred, ap->uid, ap->gid, file_mode, NULL, accmode)); 734 } 735 736 int 737 adosfs_access(void *v) 738 { 739 struct vop_access_args /* { 740 struct vnode *a_vp; 741 accmode_t a_accmode; 742 kauth_cred_t a_cred; 743 } */ *sp = v; 744 struct anode *ap; 745 struct vnode *vp = sp->a_vp; 746 int error; 747 748 #ifdef ADOSFS_DIAGNOSTIC 749 advopprint(sp); 750 #endif 751 752 ap = VTOA(vp); 753 #ifdef DIAGNOSTIC 754 if (!VOP_ISLOCKED(vp)) { 755 vprint("adosfs_access: not locked", sp->a_vp); 756 panic("adosfs_access: not locked"); 757 } 758 #endif 759 760 error = adosfs_check_possible(vp, ap, sp->a_accmode); 761 if (error) 762 return error; 763 764 error = adosfs_check_permitted(vp, ap, sp->a_accmode, sp->a_cred); 765 766 #ifdef ADOSFS_DIAGNOSTIC 767 printf(" %d)", error); 768 #endif 769 return(error); 770 } 771 772 int 773 adosfs_readlink(void *v) 774 { 775 struct vop_readlink_args /* { 776 struct vnode *a_vp; 777 struct uio *a_uio; 778 kauth_cred_t a_cred; 779 } */ *sp = v; 780 struct anode *ap; 781 int error; 782 783 #ifdef ADOSFS_DIAGNOSTIC 784 advopprint(sp); 785 #endif 786 ap = VTOA(sp->a_vp); 787 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio); 788 #ifdef ADOSFS_DIAGNOSTIC 789 printf(" %d)", error); 790 #endif 791 return (error); 792 } 793 794 /*ARGSUSED*/ 795 int 796 adosfs_inactive(void *v) 797 { 798 struct vop_inactive_v2_args /* { 799 struct vnode *a_vp; 800 bool *a_recycle; 801 } */ *sp = v; 802 #ifdef ADOSFS_DIAGNOSTIC 803 advopprint(sp); 804 #endif 805 /* XXX this needs to check if file was deleted */ 806 *sp->a_recycle = true; 807 808 #ifdef ADOSFS_DIAGNOSTIC 809 printf(" 0)"); 810 #endif 811 return(0); 812 } 813 814 /* 815 * the kernel wants its vnode back. 816 * no lock needed we are being called from vclean() 817 */ 818 int 819 adosfs_reclaim(void *v) 820 { 821 struct vop_reclaim_v2_args /* { 822 struct vnode *a_vp; 823 } */ *sp = v; 824 struct vnode *vp; 825 struct anode *ap; 826 827 VOP_UNLOCK(sp->a_vp); 828 829 #ifdef ADOSFS_DIAGNOSTIC 830 printf("(reclaim 0)"); 831 #endif 832 vp = sp->a_vp; 833 ap = VTOA(vp); 834 if (vp->v_type == VDIR && ap->tab) 835 free(ap->tab, M_ANODE); 836 else if (vp->v_type == VLNK && ap->slinkto) 837 free(ap->slinkto, M_ANODE); 838 genfs_node_destroy(vp); 839 pool_put(&adosfs_node_pool, ap); 840 vp->v_data = NULL; 841 return(0); 842 } 843 844 /* 845 * POSIX pathconf info, grabbed from kern/u fs, probably need to 846 * investigate exactly what each return type means as they are probably 847 * not valid currently 848 */ 849 int 850 adosfs_pathconf(void *v) 851 { 852 struct vop_pathconf_args /* { 853 struct vnode *a_vp; 854 int a_name; 855 register_t *a_retval; 856 } */ *ap = v; 857 858 switch (ap->a_name) { 859 case _PC_LINK_MAX: 860 *ap->a_retval = LINK_MAX; 861 return (0); 862 case _PC_NAME_MAX: 863 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 864 return (0); 865 case _PC_PATH_MAX: 866 *ap->a_retval = PATH_MAX; 867 return (0); 868 case _PC_PIPE_BUF: 869 *ap->a_retval = PIPE_BUF; 870 return (0); 871 case _PC_CHOWN_RESTRICTED: 872 *ap->a_retval = 1; 873 return (0); 874 case _PC_VDISABLE: 875 *ap->a_retval = _POSIX_VDISABLE; 876 return (0); 877 case _PC_SYNC_IO: 878 *ap->a_retval = 1; 879 return (0); 880 case _PC_FILESIZEBITS: 881 *ap->a_retval = 32; 882 return (0); 883 default: 884 return genfs_pathconf(ap); 885 } 886 /* NOTREACHED */ 887 } 888
Indexes created Mon Sep 22 13:09:51 GMT 2025