1 /* $NetBSD: advnops.c,v 1.8 2004/01/26 10:39:29 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 1.8 2004/01/26 10:39:29 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 vnode *a_vp;
385 struct buf *a_bp;
386 } */ *sp = v;
387 struct buf *bp;
388 struct anode *ap;
389 struct vnode *vp;
390 int error;
391
392 #ifdef ADOSFS_DIAGNOSTIC
393 advopprint(sp);
394 #endif
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 = sp->a_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 error = VOP_STRATEGY(vp, bp);
419 reterr:
420 #ifdef ADOSFS_DIAGNOSTIC
421 printf(" %d)", error);
422 #endif
423 return(error);
424 }
425
426 int
427 adosfs_link(v)
428 void *v;
429 {
430 struct vop_link_args /* {
431 struct vnode *a_dvp;
432 struct vnode *a_vp;
433 struct componentname *a_cnp;
434 } */ *ap = v;
435
436 VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
437 vput(ap->a_dvp);
438 return (EROFS);
439 }
440
441 int
442 adosfs_symlink(v)
443 void *v;
444 {
445 struct vop_symlink_args /* {
446 struct vnode *a_dvp;
447 struct vnode **a_vpp;
448 struct componentname *a_cnp;
449 struct vattr *a_vap;
450 char *a_target;
451 } */ *ap = v;
452
453 VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
454 vput(ap->a_dvp);
455 return (EROFS);
456 }
457
458 /*
459 * Wait until the vnode has finished changing state.
460 */
461 int
462 adosfs_bmap(v)
463 void *v;
464 {
465 struct vop_bmap_args /* {
466 struct vnode *a_vp;
467 daddr_t a_bn;
468 struct vnode **a_vpp;
469 daddr_t *a_bnp;
470 int *a_runp;
471 } */ *sp = v;
472 struct anode *ap;
473 struct buf *flbp;
474 long nb, flblk, flblkoff, fcnt;
475 daddr_t *bnp;
476 daddr_t bn;
477 int error;
478
479 #ifdef ADOSFS_DIAGNOSTIC
480 advopprint(sp);
481 #endif
482 ap = VTOA(sp->a_vp);
483 bn = sp->a_bn;
484 bnp = sp->a_bnp;
485 if (sp->a_runp) {
486 *sp->a_runp = 0;
487 }
488 error = 0;
489
490 if (sp->a_vpp != NULL)
491 *sp->a_vpp = ap->amp->devvp;
492 if (bnp == NULL)
493 goto reterr;
494 if (bn < 0) {
495 error = EFBIG;
496 goto reterr;
497 }
498 if (sp->a_vp->v_type != VREG) {
499 error = EINVAL;
500 goto reterr;
501 }
502
503 /*
504 * walk the chain of file list blocks until we find
505 * the one that will yield the block pointer we need.
506 */
507 if (ap->type == AFILE)
508 nb = ap->block; /* pointer to ourself */
509 else if (ap->type == ALFILE)
510 nb = ap->linkto; /* pointer to real file */
511 else {
512 error = EINVAL;
513 goto reterr;
514 }
515
516 flblk = bn / ANODENDATBLKENT(ap);
517 flbp = NULL;
518
519 /*
520 * check last indirect block cache
521 */
522 if (flblk < ap->lastlindblk)
523 fcnt = 0;
524 else {
525 flblk -= ap->lastlindblk;
526 fcnt = ap->lastlindblk;
527 nb = ap->lastindblk;
528 }
529 while (flblk >= 0) {
530 if (flbp)
531 brelse(flbp);
532 if (nb == 0) {
533 #ifdef DIAGNOSTIC
534 printf("adosfs: bad file list chain.\n");
535 #endif
536 error = EINVAL;
537 goto reterr;
538 }
539 error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE,
540 ap->amp->bsize, NOCRED, &flbp);
541 if (error) {
542 brelse(flbp);
543 goto reterr;
544 }
545 if (adoscksum(flbp, ap->nwords)) {
546 #ifdef DIAGNOSTIC
547 printf("adosfs: blk %ld failed cksum.\n", nb);
548 #endif
549 brelse(flbp);
550 error = EINVAL;
551 goto reterr;
552 }
553 /*
554 * update last indirect block cache
555 */
556 ap->lastlindblk = fcnt++;
557 ap->lastindblk = nb;
558
559 nb = adoswordn(flbp, ap->nwords - 2);
560 flblk--;
561 }
562 /*
563 * calculate offset of block number in table. The table starts
564 * at nwords - 51 and goes to offset 6 or less if indicated by the
565 * valid table entries stored at offset ADBI_NBLKTABENT.
566 */
567 flblkoff = bn % ANODENDATBLKENT(ap);
568 if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) {
569 flblkoff = (ap->nwords - 51) - flblkoff;
570 *bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE;
571 } else {
572 #ifdef DIAGNOSTIC
573 printf("flblk offset %ld too large in lblk %ld blk %" PRId64 "\n",
574 flblkoff, (long)bn, flbp->b_blkno);
575 #endif
576 error = EINVAL;
577 }
578 brelse(flbp);
579 reterr:
580 #ifdef ADOSFS_DIAGNOSTIC
581 if (error == 0 && bnp)
582 printf(" %lld => %lld", (long long)bn, (long long)*bnp);
583 printf(" %d)\n", error);
584 #endif
585 return(error);
586 }
587
588 /*
589 * Print out the contents of a adosfs vnode.
590 */
591 /* ARGSUSED */
592 int
593 adosfs_print(v)
594 void *v;
595 {
596 #if 0
597 struct vop_print_args /* {
598 struct vnode *a_vp;
599 } */ *sp = v;
600 #endif
601 return(0);
602 }
603
604 struct adirent {
605 u_long fileno;
606 u_short reclen;
607 char type;
608 char namlen;
609 char name[32]; /* maxlen of 30 plus 2 NUL's */
610 };
611
612 int
613 adosfs_readdir(v)
614 void *v;
615 {
616 struct vop_readdir_args /* {
617 struct vnode *a_vp;
618 struct uio *a_uio;
619 struct ucred *a_cred;
620 int *a_eofflag;
621 off_t **a_cookies;
622 int *a_ncookies;
623 } */ *sp = v;
624 int error, useri, chainc, hashi, scanned, uavail;
625 struct adirent ad, *adp;
626 struct anode *pap, *ap;
627 struct adosfsmount *amp;
628 struct vnode *vp;
629 struct uio *uio;
630 u_long nextbn;
631 off_t uoff, *cookies = NULL;
632 int ncookies = 0;
633
634 #ifdef ADOSFS_DIAGNOSTIC
635 advopprint(sp);
636 #endif
637 if (sp->a_vp->v_type != VDIR) {
638 error = ENOTDIR;
639 goto reterr;
640 }
641
642 uio = sp->a_uio;
643 uoff = uio->uio_offset;
644 if (uoff < 0) {
645 error = EINVAL;
646 goto reterr;
647 }
648
649 pap = VTOA(sp->a_vp);
650 amp = pap->amp;
651 adp = &ad;
652 error = nextbn = hashi = chainc = scanned = 0;
653 uavail = uio->uio_resid / sizeof(ad);
654 useri = uoff / sizeof(ad);
655
656 /*
657 * if no slots available or offset requested is not on a slot boundry
658 */
659 if (uavail < 1 || uoff % sizeof(ad)) {
660 error = EINVAL;
661 goto reterr;
662 }
663
664 if (sp->a_ncookies) {
665 ncookies = 0;
666 cookies = malloc(sizeof (off_t) * uavail, M_TEMP, M_WAITOK);
667 *sp->a_cookies = cookies;
668 }
669
670 while (uavail) {
671 if (hashi == pap->ntabent) {
672 *sp->a_eofflag = 1;
673 break;
674 }
675 if (pap->tab[hashi] == 0) {
676 hashi++;
677 continue;
678 }
679 if (nextbn == 0)
680 nextbn = pap->tab[hashi];
681
682 /*
683 * first determine if we can skip this chain
684 */
685 if (chainc == 0) {
686 int skip;
687
688 skip = useri - scanned;
689 if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) {
690 scanned += pap->tabi[hashi];
691 hashi++;
692 nextbn = 0;
693 continue;
694 }
695 }
696
697 /*
698 * now [continue to] walk the chain
699 */
700 ap = NULL;
701 do {
702 error = VFS_VGET(amp->mp, (ino_t)nextbn, &vp);
703 if (error)
704 goto reterr;
705 ap = VTOA(vp);
706 scanned++;
707 chainc++;
708 nextbn = ap->hashf;
709
710 /*
711 * check for end of chain.
712 */
713 if (nextbn == 0) {
714 pap->tabi[hashi] = chainc;
715 hashi++;
716 chainc = 0;
717 } else if (pap->tabi[hashi] <= 0 &&
718 -chainc < pap->tabi[hashi])
719 pap->tabi[hashi] = -chainc;
720
721 if (useri >= scanned) {
722 vput(vp);
723 ap = NULL;
724 }
725 } while (ap == NULL && nextbn != 0);
726
727 /*
728 * we left the loop but without a result so do main over.
729 */
730 if (ap == NULL)
731 continue;
732 /*
733 * Fill in dirent record
734 */
735 memset(adp, 0, sizeof(struct adirent));
736 adp->fileno = ap->block;
737 /*
738 * this deserves an function in kern/vfs_subr.c
739 */
740 switch (ATOV(ap)->v_type) {
741 case VREG:
742 adp->type = DT_REG;
743 break;
744 case VDIR:
745 adp->type = DT_DIR;
746 break;
747 case VLNK:
748 adp->type = DT_LNK;
749 break;
750 default:
751 adp->type = DT_UNKNOWN;
752 break;
753 }
754 adp->reclen = sizeof(struct adirent);
755 adp->namlen = strlen(ap->name);
756 memcpy(adp->name, ap->name, adp->namlen);
757 vput(vp);
758
759 error = uiomove((caddr_t) adp, sizeof(struct adirent), uio);
760 if (error)
761 break;
762 if (sp->a_ncookies) {
763 *cookies++ = uoff;
764 ncookies++;
765 }
766 uoff += sizeof(struct adirent);
767 useri++;
768 uavail--;
769 }
770 #if doesnt_uiomove_handle_this
771 uio->uio_offset = uoff;
772 #endif
773 reterr:
774 #ifdef ADOSFS_DIAGNOSTIC
775 printf(" %d)", error);
776 #endif
777 if (sp->a_ncookies) {
778 if (error) {
779 free(*sp->a_cookies, M_TEMP);
780 *sp->a_ncookies = 0;
781 *sp->a_cookies = NULL;
782 } else
783 *sp->a_ncookies = ncookies;
784 }
785 return(error);
786 }
787
788
789 int
790 adosfs_access(v)
791 void *v;
792 {
793 struct vop_access_args /* {
794 struct vnode *a_vp;
795 int a_mode;
796 struct ucred *a_cred;
797 struct proc *a_p;
798 } */ *sp = v;
799 struct anode *ap;
800 struct vnode *vp = sp->a_vp;
801 int error;
802
803 #ifdef ADOSFS_DIAGNOSTIC
804 advopprint(sp);
805 #endif
806
807 ap = VTOA(vp);
808 #ifdef DIAGNOSTIC
809 if (!VOP_ISLOCKED(vp)) {
810 vprint("adosfs_access: not locked", sp->a_vp);
811 panic("adosfs_access: not locked");
812 }
813 #endif
814 /*
815 * Disallow write attempts unless the file is a socket,
816 * fifo, or a block or character device resident on the
817 * file system.
818 */
819 if (sp->a_mode & VWRITE) {
820 switch (vp->v_type) {
821 case VDIR:
822 case VLNK:
823 case VREG:
824 return (EROFS);
825 default:
826 break;
827 }
828 }
829 #ifdef QUOTA
830 #endif
831 error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask,
832 ap->uid, ap->gid, sp->a_mode, sp->a_cred);
833 #ifdef ADOSFS_DIAGNOSTIC
834 printf(" %d)", error);
835 #endif
836 return(error);
837 }
838
839 int
840 adosfs_readlink(v)
841 void *v;
842 {
843 struct vop_readlink_args /* {
844 struct vnode *a_vp;
845 struct uio *a_uio;
846 struct ucred *a_cred;
847 } */ *sp = v;
848 struct anode *ap;
849 int error;
850
851 #ifdef ADOSFS_DIAGNOSTIC
852 advopprint(sp);
853 #endif
854 ap = VTOA(sp->a_vp);
855 error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio);
856 #ifdef ADOSFS_DIAGNOSTIC
857 printf(" %d)", error);
858 #endif
859 return (error);
860 }
861
862 /*ARGSUSED*/
863 int
864 adosfs_inactive(v)
865 void *v;
866 {
867 struct vop_inactive_args /* {
868 struct vnode *a_vp;
869 struct proc *a_p;
870 } */ *sp = v;
871 struct vnode *vp = sp->a_vp;
872 struct proc *p = sp->a_p;
873 #ifdef ADOSFS_DIAGNOSTIC
874 advopprint(sp);
875 #endif
876 VOP_UNLOCK(vp, 0);
877 /* XXX this needs to check if file was deleted */
878 vrecycle(vp, NULL, p);
879
880 #ifdef ADOSFS_DIAGNOSTIC
881 printf(" 0)");
882 #endif
883 return(0);
884 }
885
886 /*
887 * the kernel wants its vnode back.
888 * no lock needed we are being called from vclean()
889 */
890 int
891 adosfs_reclaim(v)
892 void *v;
893 {
894 struct vop_reclaim_args /* {
895 struct vnode *a_vp;
896 } */ *sp = v;
897 struct vnode *vp;
898 struct anode *ap;
899
900 #ifdef ADOSFS_DIAGNOSTIC
901 printf("(reclaim 0)");
902 #endif
903 vp = sp->a_vp;
904 ap = VTOA(vp);
905 LIST_REMOVE(ap, link);
906 cache_purge(vp);
907 if (vp->v_type == VDIR && ap->tab)
908 free(ap->tab, M_ANODE);
909 else if (vp->v_type == VLNK && ap->slinkto)
910 free(ap->slinkto, M_ANODE);
911 pool_put(&adosfs_node_pool, ap);
912 vp->v_data = NULL;
913 return(0);
914 }
915
916 /*
917 * POSIX pathconf info, grabbed from kern/u fs, probably need to
918 * investigate exactly what each return type means as they are probably
919 * not valid currently
920 */
921 int
922 adosfs_pathconf(v)
923 void *v;
924 {
925 struct vop_pathconf_args /* {
926 struct vnode *a_vp;
927 int a_name;
928 register_t *a_retval;
929 } */ *sp = v;
930
931 switch (sp->a_name) {
932 case _PC_LINK_MAX:
933 *sp->a_retval = LINK_MAX;
934 return (0);
935 case _PC_PIPE_BUF:
936 *sp->a_retval = PIPE_BUF;
937 return (0);
938 case _PC_CHOWN_RESTRICTED:
939 *sp->a_retval = 1;
940 return (0);
941 case _PC_VDISABLE:
942 *sp->a_retval = _POSIX_VDISABLE;
943 return (0);
944 case _PC_SYNC_IO:
945 *sp->a_retval = 1;
946 return (0);
947 case _PC_FILESIZEBITS:
948 *sp->a_retval = 32;
949 return (0);
950 default:
951 return (EINVAL);
952 }
953 /* NOTREACHED */
954 }
Cache object: d2f4cff1b107842cc5533835511721c2
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