xref: /freebsd/sys/fs/tarfs/tarfs_vnops.c (revision 3f0efe05432b1633991114ca4ca330102a561959)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2013 Juniper Networks, Inc.
5  * Copyright (c) 2022-2023 Klara, Inc.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include "opt_tarfs.h"
30 
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/bio.h>
34 #include <sys/buf.h>
35 #include <sys/dirent.h>
36 #include <sys/fcntl.h>
37 #include <sys/limits.h>
38 #include <sys/mount.h>
39 #include <sys/namei.h>
40 #include <sys/proc.h>
41 #include <sys/vnode.h>
42 
43 #include <fs/tarfs/tarfs.h>
44 #include <fs/tarfs/tarfs_dbg.h>
45 
46 static int
47 tarfs_open(struct vop_open_args *ap)
48 {
49 	struct tarfs_node *tnp;
50 	struct vnode *vp;
51 
52 	vp = ap->a_vp;
53 	MPASS(VOP_ISLOCKED(vp));
54 	tnp = VP_TO_TARFS_NODE(vp);
55 
56 	TARFS_DPF(VNODE, "%s(%p=%s, %o)\n", __func__,
57 	    tnp, tnp->name, ap->a_mode);
58 
59 	if (vp->v_type != VREG && vp->v_type != VDIR)
60 		return (EOPNOTSUPP);
61 
62 	vnode_create_vobject(vp, tnp->size, ap->a_td);
63 	return (0);
64 }
65 
66 static int
67 tarfs_close(struct vop_close_args *ap)
68 {
69 #ifdef TARFS_DEBUG
70 	struct tarfs_node *tnp;
71 	struct vnode *vp;
72 
73 	vp = ap->a_vp;
74 
75 	MPASS(VOP_ISLOCKED(vp));
76 	tnp = VP_TO_TARFS_NODE(vp);
77 
78 	TARFS_DPF(VNODE, "%s(%p=%s)\n", __func__,
79 	    tnp, tnp->name);
80 #else
81 	(void)ap;
82 #endif
83 	return (0);
84 }
85 
86 static int
87 tarfs_access(struct vop_access_args *ap)
88 {
89 	struct tarfs_node *tnp;
90 	struct vnode *vp;
91 	accmode_t accmode;
92 	struct ucred *cred;
93 	int error;
94 
95 	vp = ap->a_vp;
96 	accmode = ap->a_accmode;
97 	cred = ap->a_cred;
98 
99 	MPASS(VOP_ISLOCKED(vp));
100 	tnp = VP_TO_TARFS_NODE(vp);
101 
102 	TARFS_DPF(VNODE, "%s(%p=%s, %o)\n", __func__,
103 	    tnp, tnp->name, accmode);
104 
105 	switch (vp->v_type) {
106 	case VDIR:
107 	case VLNK:
108 	case VREG:
109 		if ((accmode & VWRITE) != 0)
110 			return (EROFS);
111 		break;
112 	case VBLK:
113 	case VCHR:
114 	case VFIFO:
115 		break;
116 	default:
117 		return (EINVAL);
118 	}
119 
120 	if ((accmode & VWRITE) != 0)
121 		return (EPERM);
122 
123 	error = vaccess(vp->v_type, tnp->mode, tnp->uid,
124 	    tnp->gid, accmode, cred);
125 	return (error);
126 }
127 
128 static int
129 tarfs_bmap(struct vop_bmap_args *ap)
130 {
131 	struct tarfs_node *tnp;
132 	struct vnode *vp;
133 	off_t off;
134 	uint64_t iosize;
135 	int ra, rb, rmax;
136 
137 	vp = ap->a_vp;
138 	iosize = vp->v_mount->mnt_stat.f_iosize;
139 
140 	if (ap->a_bop != NULL)
141 		*ap->a_bop = &vp->v_bufobj;
142 	if (ap->a_bnp != NULL)
143 		*ap->a_bnp = ap->a_bn * btodb(iosize);
144 	if (ap->a_runp == NULL)
145 		return (0);
146 
147 	tnp = VP_TO_TARFS_NODE(vp);
148 	off = ap->a_bn * iosize;
149 
150 	ra = rb = 0;
151 	for (u_int i = 0; i < tnp->nblk; i++) {
152 		off_t bs, be;
153 
154 		bs = tnp->blk[i].o;
155 		be = tnp->blk[i].o + tnp->blk[i].l;
156 		if (off > be)
157 			continue;
158 		else if (off < bs) {
159 			/* We're in a hole. */
160 			ra = bs - off < iosize ?
161 			    0 : howmany(bs - (off + iosize), iosize);
162 			rb = howmany(off - (i == 0 ?
163 			    0 : tnp->blk[i - 1].o + tnp->blk[i - 1].l),
164 			    iosize);
165 			break;
166 		} else {
167 			/* We'll be reading from the backing file. */
168 			ra = be - off < iosize ?
169 			    0 : howmany(be - (off + iosize), iosize);
170 			rb = howmany(off - bs, iosize);
171 			break;
172 		}
173 	}
174 
175 	rmax = vp->v_mount->mnt_iosize_max / iosize - 1;
176 	*ap->a_runp = imin(ra, rmax);
177 	if (ap->a_runb != NULL)
178 		*ap->a_runb = imin(rb, rmax);
179 	return (0);
180 }
181 
182 static int
183 tarfs_getattr(struct vop_getattr_args *ap)
184 {
185 	struct tarfs_node *tnp;
186 	struct vnode *vp;
187 	struct vattr *vap;
188 
189 	vp = ap->a_vp;
190 	vap = ap->a_vap;
191 	tnp = VP_TO_TARFS_NODE(vp);
192 
193 	TARFS_DPF(VNODE, "%s(%p=%s)\n", __func__,
194 	    tnp, tnp->name);
195 
196 	vap->va_type = vp->v_type;
197 	vap->va_mode = tnp->mode;
198 	vap->va_nlink = tnp->nlink;
199 	vap->va_gid = tnp->gid;
200 	vap->va_uid = tnp->uid;
201 	vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
202 	vap->va_fileid = tnp->ino;
203 	vap->va_size = tnp->size;
204 	vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
205 	vap->va_atime = tnp->atime;
206 	vap->va_ctime = tnp->ctime;
207 	vap->va_mtime = tnp->mtime;
208 	vap->va_birthtime = tnp->birthtime;
209 	vap->va_gen = tnp->gen;
210 	vap->va_flags = tnp->flags;
211 	vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ?
212 	    tnp->rdev : NODEV;
213 	vap->va_bytes = round_page(tnp->physize);
214 	vap->va_filerev = 0;
215 
216 	return (0);
217 }
218 
219 static int
220 tarfs_lookup(struct vop_cachedlookup_args *ap)
221 {
222 	struct tarfs_mount *tmp;
223 	struct tarfs_node *dirnode, *parent, *tnp;
224 	struct componentname *cnp;
225 	struct vnode *dvp, **vpp;
226 #ifdef TARFS_DEBUG
227 	struct vnode *vp;
228 #endif
229 	int error;
230 
231 	dvp = ap->a_dvp;
232 	vpp = ap->a_vpp;
233 	cnp = ap->a_cnp;
234 
235 	*vpp = NULLVP;
236 	dirnode = VP_TO_TARFS_NODE(dvp);
237 	parent = dirnode->parent;
238 	tmp = dirnode->tmp;
239 	tnp = NULL;
240 
241 	TARFS_DPF(LOOKUP, "%s(%p=%s, %.*s)\n", __func__,
242 	    dirnode, dirnode->name,
243 	    (int)cnp->cn_namelen, cnp->cn_nameptr);
244 
245 	error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, curthread);
246 	if (error != 0)
247 		return (error);
248 
249 	if (cnp->cn_flags & ISDOTDOT) {
250 		/* Do not allow .. on the root node */
251 		if (parent == NULL || parent == dirnode)
252 			return (ENOENT);
253 
254 		/* Allocate a new vnode on the matching entry */
255 		error = vn_vget_ino(dvp, parent->ino, cnp->cn_lkflags,
256 		    vpp);
257 		if (error != 0)
258 			return (error);
259 	} else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
260 		VREF(dvp);
261 		*vpp = dvp;
262 #ifdef TARFS_DEBUG
263 	} else if (dirnode == dirnode->tmp->root &&
264 	    (vp = dirnode->tmp->znode) != NULL &&
265 	    cnp->cn_namelen == TARFS_ZIO_NAMELEN &&
266 	    memcmp(cnp->cn_nameptr, TARFS_ZIO_NAME, TARFS_ZIO_NAMELEN) == 0) {
267 		error = vn_lock(vp, cnp->cn_lkflags);
268 		if (error != 0)
269 			return (error);
270 		vref(vp);
271 		*vpp = vp;
272 		return (0);
273 #endif
274 	} else {
275 		tnp = tarfs_lookup_node(dirnode, NULL, cnp);
276 		if (tnp == NULL) {
277 			TARFS_DPF(LOOKUP, "%s(%p=%s, %.*s): file not found\n", __func__,
278 			    dirnode, dirnode->name,
279 			    (int)cnp->cn_namelen, cnp->cn_nameptr);
280 			return (ENOENT);
281 		}
282 
283 		if ((cnp->cn_flags & ISLASTCN) == 0 &&
284 		    (tnp->type != VDIR && tnp->type != VLNK))
285 			return (ENOTDIR);
286 
287 		error = VFS_VGET(tmp->vfs, tnp->ino, cnp->cn_lkflags, vpp);
288 		if (error != 0)
289 			return (error);
290 	}
291 
292 #ifdef	TARFS_DEBUG
293 	if (tnp == NULL)
294 		tnp = VP_TO_TARFS_NODE(*vpp);
295 	TARFS_DPF(LOOKUP, "%s: found vnode %p, tarfs_node %p\n", __func__,
296 	    *vpp, tnp);
297 #endif	/* TARFS_DEBUG */
298 
299 	/* Store the result of the cache if MAKEENTRY is specified in flags */
300 	if ((cnp->cn_flags & MAKEENTRY) != 0 && cnp->cn_nameiop != CREATE)
301 		cache_enter(dvp, *vpp, cnp);
302 
303 	return (error);
304 }
305 
306 static int
307 tarfs_readdir(struct vop_readdir_args *ap)
308 {
309 	struct dirent cde = { };
310 	struct tarfs_node *current, *tnp;
311 	struct vnode *vp;
312 	struct uio *uio;
313 	int *eofflag;
314 	uint64_t **cookies;
315 	int *ncookies;
316 	off_t off;
317 	u_int idx, ndirents;
318 	int error;
319 
320 	vp = ap->a_vp;
321 	uio = ap->a_uio;
322 	eofflag = ap->a_eofflag;
323 	cookies = ap->a_cookies;
324 	ncookies = ap->a_ncookies;
325 
326 	if (vp->v_type != VDIR)
327 		return (ENOTDIR);
328 
329 	tnp = VP_TO_TARFS_NODE(vp);
330 	off = uio->uio_offset;
331 	current = NULL;
332 	ndirents = 0;
333 
334 	TARFS_DPF(VNODE, "%s(%p=%s, %zu, %zd)\n", __func__,
335 	    tnp, tnp->name, uio->uio_offset, uio->uio_resid);
336 
337 	if (uio->uio_offset == TARFS_COOKIE_EOF) {
338 		TARFS_DPF(VNODE, "%s: EOF\n", __func__);
339 		return (0);
340 	}
341 
342 	if (uio->uio_offset == TARFS_COOKIE_DOT) {
343 		TARFS_DPF(VNODE, "%s: Generating . entry\n", __func__);
344 		/* fake . entry */
345 		cde.d_fileno = tnp->ino;
346 		cde.d_type = DT_DIR;
347 		cde.d_namlen = 1;
348 		cde.d_name[0] = '.';
349 		cde.d_name[1] = '\0';
350 		cde.d_reclen = GENERIC_DIRSIZ(&cde);
351 		if (cde.d_reclen > uio->uio_resid)
352 			goto full;
353 		dirent_terminate(&cde);
354 		error = uiomove(&cde, cde.d_reclen, uio);
355 		if (error)
356 			return (error);
357 		/* next is .. */
358 		uio->uio_offset = TARFS_COOKIE_DOTDOT;
359 		ndirents++;
360 	}
361 
362 	if (uio->uio_offset == TARFS_COOKIE_DOTDOT) {
363 		TARFS_DPF(VNODE, "%s: Generating .. entry\n", __func__);
364 		/* fake .. entry */
365 		MPASS(tnp->parent != NULL);
366 		TARFS_NODE_LOCK(tnp->parent);
367 		cde.d_fileno = tnp->parent->ino;
368 		TARFS_NODE_UNLOCK(tnp->parent);
369 		cde.d_type = DT_DIR;
370 		cde.d_namlen = 2;
371 		cde.d_name[0] = '.';
372 		cde.d_name[1] = '.';
373 		cde.d_name[2] = '\0';
374 		cde.d_reclen = GENERIC_DIRSIZ(&cde);
375 		if (cde.d_reclen > uio->uio_resid)
376 			goto full;
377 		dirent_terminate(&cde);
378 		error = uiomove(&cde, cde.d_reclen, uio);
379 		if (error)
380 			return (error);
381 		/* next is first child */
382 		current = TAILQ_FIRST(&tnp->dir.dirhead);
383 		if (current == NULL)
384 			goto done;
385 		uio->uio_offset = current->ino;
386 		TARFS_DPF(VNODE, "%s: [%u] setting current node to %p=%s\n",
387 		    __func__, ndirents, current, current->name);
388 		ndirents++;
389 	}
390 
391 	/* resuming previous call */
392 	if (current == NULL) {
393 		current = tarfs_lookup_dir(tnp, uio->uio_offset);
394 		if (current == NULL) {
395 			error = EINVAL;
396 			goto done;
397 		}
398 		uio->uio_offset = current->ino;
399 		TARFS_DPF(VNODE, "%s: [%u] setting current node to %p=%s\n",
400 		    __func__, ndirents, current, current->name);
401 	}
402 
403 	for (;;) {
404 		cde.d_fileno = current->ino;
405 		switch (current->type) {
406 		case VBLK:
407 			cde.d_type = DT_BLK;
408 			break;
409 		case VCHR:
410 			cde.d_type = DT_CHR;
411 			break;
412 		case VDIR:
413 			cde.d_type = DT_DIR;
414 			break;
415 		case VFIFO:
416 			cde.d_type = DT_FIFO;
417 			break;
418 		case VLNK:
419 			cde.d_type = DT_LNK;
420 			break;
421 		case VREG:
422 			cde.d_type = DT_REG;
423 			break;
424 		default:
425 			panic("%s: tarfs_node %p, type %d\n", __func__,
426 			    current, current->type);
427 		}
428 		cde.d_namlen = current->namelen;
429 		MPASS(tnp->namelen < sizeof(cde.d_name));
430 		(void)memcpy(cde.d_name, current->name, current->namelen);
431 		cde.d_name[current->namelen] = '\0';
432 		cde.d_reclen = GENERIC_DIRSIZ(&cde);
433 		if (cde.d_reclen > uio->uio_resid)
434 			goto full;
435 		dirent_terminate(&cde);
436 		error = uiomove(&cde, cde.d_reclen, uio);
437 		if (error != 0)
438 			goto done;
439 		ndirents++;
440 		/* next sibling */
441 		current = TAILQ_NEXT(current, dirents);
442 		if (current == NULL)
443 			goto done;
444 		uio->uio_offset = current->ino;
445 		TARFS_DPF(VNODE, "%s: [%u] setting current node to %p=%s\n",
446 		    __func__, ndirents, current, current->name);
447 	}
448 full:
449 	if (cde.d_reclen > uio->uio_resid) {
450 		TARFS_DPF(VNODE, "%s: out of space, returning\n",
451 		    __func__);
452 		error = (ndirents == 0) ? EINVAL : 0;
453 	}
454 done:
455 	TARFS_DPF(VNODE, "%s: %u entries written\n", __func__, ndirents);
456 	TARFS_DPF(VNODE, "%s: saving cache information\n", __func__);
457 	if (current == NULL) {
458 		uio->uio_offset = TARFS_COOKIE_EOF;
459 		tnp->dir.lastcookie = 0;
460 		tnp->dir.lastnode = NULL;
461 	} else {
462 		tnp->dir.lastcookie = current->ino;
463 		tnp->dir.lastnode = current;
464 	}
465 
466 	if (eofflag != NULL) {
467 		TARFS_DPF(VNODE, "%s: Setting EOF flag\n", __func__);
468 		*eofflag = (error == 0 && current == NULL);
469 	}
470 
471 	/* Update for NFS */
472 	if (error == 0 && cookies != NULL && ncookies != NULL) {
473 		TARFS_DPF(VNODE, "%s: Updating NFS cookies\n", __func__);
474 		current = NULL;
475 		*cookies = malloc(ndirents * sizeof(off_t), M_TEMP, M_WAITOK);
476 		*ncookies = ndirents;
477 		for (idx = 0; idx < ndirents; idx++) {
478 			if (off == TARFS_COOKIE_DOT)
479 				off = TARFS_COOKIE_DOTDOT;
480 			else {
481 				if (off == TARFS_COOKIE_DOTDOT) {
482 					current = TAILQ_FIRST(&tnp->dir.dirhead);
483 				} else if (current != NULL) {
484 					current = TAILQ_NEXT(current, dirents);
485 				} else {
486 					current = tarfs_lookup_dir(tnp, off);
487 					current = TAILQ_NEXT(current, dirents);
488 				}
489 				if (current == NULL)
490 					off = TARFS_COOKIE_EOF;
491 				else
492 					off = current->ino;
493 			}
494 
495 			TARFS_DPF(VNODE, "%s: [%u] offset %zu\n", __func__,
496 			    idx, off);
497 			(*cookies)[idx] = off;
498 		}
499 		MPASS(uio->uio_offset == off);
500 	}
501 
502 	return (error);
503 }
504 
505 static int
506 tarfs_read(struct vop_read_args *ap)
507 {
508 	struct tarfs_node *tnp;
509 	struct uio *uiop;
510 	struct vnode *vp;
511 	size_t len;
512 	off_t resid;
513 	int error;
514 
515 	uiop = ap->a_uio;
516 	vp = ap->a_vp;
517 
518 	if (vp->v_type == VCHR || vp->v_type == VBLK)
519 		return (EOPNOTSUPP);
520 
521 	if (vp->v_type != VREG)
522 		return (EISDIR);
523 
524 	if (uiop->uio_offset < 0)
525 		return (EINVAL);
526 
527 	tnp = VP_TO_TARFS_NODE(vp);
528 	error = 0;
529 
530 	TARFS_DPF(VNODE, "%s(%p=%s, %zu, %zd)\n", __func__,
531 	    tnp, tnp->name, uiop->uio_offset, uiop->uio_resid);
532 
533 	while ((resid = uiop->uio_resid) > 0) {
534 		if (tnp->size <= uiop->uio_offset)
535 			break;
536 		len = MIN(tnp->size - uiop->uio_offset, resid);
537 		if (len == 0)
538 			break;
539 
540 		error = tarfs_read_file(tnp, len, uiop);
541 		if (error != 0 || resid == uiop->uio_resid)
542 			break;
543 	}
544 
545 	return (error);
546 }
547 
548 static int
549 tarfs_readlink(struct vop_readlink_args *ap)
550 {
551 	struct tarfs_node *tnp;
552 	struct uio *uiop;
553 	struct vnode *vp;
554 	int error;
555 
556 	uiop = ap->a_uio;
557 	vp = ap->a_vp;
558 
559 	MPASS(uiop->uio_offset == 0);
560 	MPASS(vp->v_type == VLNK);
561 
562 	tnp = VP_TO_TARFS_NODE(vp);
563 
564 	TARFS_DPF(VNODE, "%s(%p=%s)\n", __func__,
565 	    tnp, tnp->name);
566 
567 	error = uiomove(tnp->link.name,
568 	    MIN(tnp->size, uiop->uio_resid), uiop);
569 
570 	return (error);
571 }
572 
573 static int
574 tarfs_reclaim(struct vop_reclaim_args *ap)
575 {
576 	struct tarfs_node *tnp;
577 	struct vnode *vp;
578 
579 	vp = ap->a_vp;
580 	tnp = VP_TO_TARFS_NODE(vp);
581 
582 	vfs_hash_remove(vp);
583 
584 	TARFS_NODE_LOCK(tnp);
585 	tnp->vnode = NULLVP;
586 	vp->v_data = NULL;
587 	TARFS_NODE_UNLOCK(tnp);
588 
589 	return (0);
590 }
591 
592 static int
593 tarfs_print(struct vop_print_args *ap)
594 {
595 	struct tarfs_node *tnp;
596 	struct vnode *vp;
597 
598 	vp = ap->a_vp;
599 	tnp = VP_TO_TARFS_NODE(vp);
600 
601 	printf("tag tarfs, tarfs_node %p, links %lu\n",
602 	    tnp, (unsigned long)tnp->nlink);
603 	printf("\tmode 0%o, owner %d, group %d, size %zd\n",
604 	    tnp->mode, tnp->uid, tnp->gid,
605 	    tnp->size);
606 
607 	if (vp->v_type == VFIFO)
608 		fifo_printinfo(vp);
609 
610 	printf("\n");
611 
612 	return (0);
613 }
614 
615 static int
616 tarfs_strategy(struct vop_strategy_args *ap)
617 {
618 	struct uio auio;
619 	struct iovec iov;
620 	struct tarfs_node *tnp;
621 	struct buf *bp;
622 	off_t off;
623 	size_t len;
624 	int error;
625 
626 	tnp = VP_TO_TARFS_NODE(ap->a_vp);
627 	bp = ap->a_bp;
628 	MPASS(bp->b_iocmd == BIO_READ);
629 	MPASS(bp->b_iooffset >= 0);
630 	MPASS(bp->b_bcount > 0);
631 	MPASS(bp->b_bufsize >= bp->b_bcount);
632 	TARFS_DPF(VNODE, "%s(%p=%s, %zu, %ld/%ld)\n", __func__, tnp,
633 	    tnp->name, (size_t)bp->b_iooffset, bp->b_bcount, bp->b_bufsize);
634 	iov.iov_base = bp->b_data;
635 	iov.iov_len = bp->b_bcount;
636 	off = bp->b_iooffset;
637 	len = bp->b_bcount;
638 	bp->b_resid = len;
639 	if (off > tnp->size) {
640 		/* XXX read beyond EOF - figure out correct handling */
641 		error = EIO;
642 		goto out;
643 	}
644 	if (off + len > tnp->size) {
645 		/* clip to file length */
646 		len = tnp->size - off;
647 	}
648 	auio.uio_iov = &iov;
649 	auio.uio_iovcnt = 1;
650 	auio.uio_offset = off;
651 	auio.uio_resid = len;
652 	auio.uio_segflg = UIO_SYSSPACE;
653 	auio.uio_rw = UIO_READ;
654 	auio.uio_td = curthread;
655 	error = tarfs_read_file(tnp, len, &auio);
656 	bp->b_resid -= len - auio.uio_resid;
657 out:
658 	if (error != 0) {
659 		bp->b_ioflags |= BIO_ERROR;
660 		bp->b_error = error;
661 	}
662 	bp->b_flags |= B_DONE;
663 	return (0);
664 }
665 
666 static int
667 tarfs_vptofh(struct vop_vptofh_args *ap)
668 {
669 	struct tarfs_fid *tfp;
670 	struct tarfs_node *tnp;
671 
672 	tfp = (struct tarfs_fid *)ap->a_fhp;
673 	tnp = VP_TO_TARFS_NODE(ap->a_vp);
674 
675 	tfp->len = sizeof(struct tarfs_fid);
676 	tfp->ino = tnp->ino;
677 	tfp->gen = tnp->gen;
678 
679 	return (0);
680 }
681 
682 struct vop_vector tarfs_vnodeops = {
683 	.vop_default =		&default_vnodeops,
684 
685 	.vop_access =		tarfs_access,
686 	.vop_bmap =		tarfs_bmap,
687 	.vop_cachedlookup =	tarfs_lookup,
688 	.vop_close =		tarfs_close,
689 	.vop_getattr =		tarfs_getattr,
690 	.vop_lookup =		vfs_cache_lookup,
691 	.vop_open =		tarfs_open,
692 	.vop_print =		tarfs_print,
693 	.vop_read =		tarfs_read,
694 	.vop_readdir =		tarfs_readdir,
695 	.vop_readlink =		tarfs_readlink,
696 	.vop_reclaim =		tarfs_reclaim,
697 	.vop_strategy =		tarfs_strategy,
698 	.vop_vptofh =		tarfs_vptofh,
699 };
700 VFS_VOP_VECTOR_REGISTER(tarfs_vnodeops);
701