xref: /dflybsd-src/sys/vfs/hpfs/hpfs_vfsops.c (revision 48d201a5a8c1dab4aa7166b0812594c101fc43c3)
1 /*-
2  * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD: src/sys/fs/hpfs/hpfs_vfsops.c,v 1.3.2.2 2001/12/25 01:44:45 dillon Exp $
27  * $DragonFly: src/sys/vfs/hpfs/hpfs_vfsops.c,v 1.20 2004/08/28 19:02:14 dillon Exp $
28  */
29 
30 
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/namei.h>
34 #include <sys/conf.h>
35 #include <sys/proc.h>
36 #include <sys/kernel.h>
37 #include <sys/vnode.h>
38 #include <sys/mount.h>
39 #include <sys/buf.h>
40 #include <sys/fcntl.h>
41 #include <sys/malloc.h>
42 
43 #include <vm/vm.h>
44 #include <vm/vm_param.h>
45 #if defined(__NetBSD__)
46 #include <vm/vm_prot.h>
47 #endif
48 #include <vm/vm_page.h>
49 #include <vm/vm_object.h>
50 #include <vm/vm_extern.h>
51 #include <sys/buf2.h>
52 
53 #if defined(__NetBSD__)
54 #include <miscfs/specfs/specdev.h>
55 #endif
56 
57 #include "hpfs.h"
58 #include "hpfsmount.h"
59 #include "hpfs_subr.h"
60 
61 extern struct vnodeopv_entry_desc hpfs_vnodeop_entries[];
62 
63 #if defined(__DragonFly__)
64 MALLOC_DEFINE(M_HPFSMNT, "HPFS mount", "HPFS mount structure");
65 MALLOC_DEFINE(M_HPFSNO, "HPFS node", "HPFS node structure");
66 #endif
67 
68 static int	hpfs_root (struct mount *, struct vnode **);
69 static int	hpfs_statfs (struct mount *, struct statfs *,
70 				 struct thread *);
71 static int	hpfs_unmount (struct mount *, int, struct thread *);
72 static int	hpfs_vget (struct mount *mp, ino_t ino,
73 			       struct vnode **vpp);
74 static int	hpfs_mountfs (struct vnode *, struct mount *,
75 				  struct hpfs_args *, struct thread *);
76 static int	hpfs_vptofh (struct vnode *, struct fid *);
77 static int	hpfs_fhtovp (struct mount *, struct fid *,
78 				 struct vnode **);
79 
80 #if !defined(__DragonFly__)
81 static int	hpfs_quotactl (struct mount *, int, uid_t, caddr_t,
82 				   struct proc *);
83 static int	hpfs_start (struct mount *, int, struct proc *);
84 static int	hpfs_sync (struct mount *, int, struct ucred *,
85 			       struct proc *);
86 #endif
87 
88 #if defined(__DragonFly__)
89 struct sockaddr;
90 static int	hpfs_mount (struct mount *, char *, caddr_t,
91 				struct nameidata *, struct thread *);
92 static int	hpfs_init (struct vfsconf *);
93 static int	hpfs_checkexp (struct mount *, struct sockaddr *,
94 				   int *, struct ucred **);
95 #else /* defined(__NetBSD__) */
96 static int	hpfs_mount (struct mount *, const char *, void *,
97 				struct nameidata *, struct proc *);
98 static void	hpfs_init (void);
99 static int	hpfs_mountroot (void);
100 static int	hpfs_sysctl (int *, u_int, void *, size_t *, void *,
101 				 size_t, struct proc *);
102 static int	hpfs_checkexp (struct mount *, struct mbuf *,
103 				   int *, struct ucred **);
104 #endif
105 
106 /*ARGSUSED*/
107 static int
108 hpfs_checkexp(struct mount *mp,
109 #if defined(__DragonFly__)
110 	      struct sockaddr *nam,
111 #else /* defined(__NetBSD__) */
112 	      struct mbuf *nam,
113 #endif
114 	      int *exflagsp, struct ucred **credanonp)
115 {
116 	struct netcred *np;
117 	struct hpfsmount *hpm = VFSTOHPFS(mp);
118 
119 	/*
120 	 * Get the export permission structure for this <mp, client> tuple.
121 	 */
122 	np = vfs_export_lookup(mp, &hpm->hpm_export, nam);
123 	if (np == NULL)
124 		return (EACCES);
125 
126 	*exflagsp = np->netc_exflags;
127 	*credanonp = &np->netc_anon;
128 	return (0);
129 }
130 
131 #if !defined(__DragonFly__)
132 /*ARGSUSED*/
133 static int
134 hpfs_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
135 	    size_t newlen, struct thread *td)
136 {
137 	return (EINVAL);
138 }
139 
140 static int
141 hpfs_mountroot(void)
142 {
143 	return (EINVAL);
144 }
145 #endif
146 
147 #if defined(__DragonFly__)
148 static int
149 hpfs_init(struct vfsconf *vcp)
150 #else /* defined(__NetBSD__) */
151 static void
152 hpfs_init(void)
153 #endif
154 {
155 	dprintf(("hpfs_init():\n"));
156 
157 	hpfs_hphashinit();
158 #if defined(__DragonFly__)
159 	return 0;
160 #endif
161 }
162 
163 static int
164 hpfs_mount(struct mount *mp,
165 #if defined(__DragonFly__)
166 	   char *path, caddr_t data,
167 #else /* defined(__NetBSD__) */
168 	   const char *path, void *data,
169 #endif
170 	   struct nameidata *ndp, struct thread *td)
171 {
172 	u_int		size;
173 	int		err = 0;
174 	struct vnode	*devvp;
175 	struct hpfs_args args;
176 	struct hpfsmount *hpmp = 0;
177 
178 	dprintf(("hpfs_mount():\n"));
179 	/*
180 	 ***
181 	 * Mounting non-root file system or updating a file system
182 	 ***
183 	 */
184 
185 	/* copy in user arguments*/
186 	err = copyin(data, (caddr_t)&args, sizeof (struct hpfs_args));
187 	if (err)
188 		goto error_1;		/* can't get arguments*/
189 
190 	/*
191 	 * If updating, check whether changing from read-only to
192 	 * read/write; if there is no device name, that's all we do.
193 	 */
194 	if (mp->mnt_flag & MNT_UPDATE) {
195 		dprintf(("hpfs_mount: MNT_UPDATE: "));
196 
197 		hpmp = VFSTOHPFS(mp);
198 
199 		if (args.fspec == 0) {
200 			dprintf(("export 0x%x\n",args.export.ex_flags));
201 			err = vfs_export(mp, &hpmp->hpm_export, &args.export);
202 			if (err) {
203 				printf("hpfs_mount: vfs_export failed %d\n",
204 					err);
205 			}
206 			goto success;
207 		} else {
208 			dprintf(("name [FAILED]\n"));
209 			err = EINVAL;
210 			goto success;
211 		}
212 		dprintf(("\n"));
213 	}
214 
215 	/*
216 	 * Not an update, or updating the name: look up the name
217 	 * and verify that it refers to a sensible block device.
218 	 */
219 	NDINIT(ndp, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, args.fspec, td);
220 	err = namei(ndp);
221 	if (err) {
222 		/* can't get devvp!*/
223 		goto error_1;
224 	}
225 
226 	devvp = ndp->ni_vp;
227 
228 #if defined(__DragonFly__)
229 	if (!vn_isdisk(devvp, &err))
230 		goto error_2;
231 #else /* defined(__NetBSD__) */
232 	if (devvp->v_type != VBLK) {
233 		err = ENOTBLK;
234 		goto error_2;
235 	}
236 	if (umajor(devvp->v_udev) >= nblkdev) {
237 		err = ENXIO;
238 		goto error_2;
239 	}
240 #endif
241 
242 	/*
243 	 ********************
244 	 * NEW MOUNT
245 	 ********************
246 	 */
247 
248 	/*
249 	 * Since this is a new mount, we want the names for
250 	 * the device and the mount point copied in.  If an
251 	 * error occurs,  the mountpoint is discarded by the
252 	 * upper level code.
253 	 */
254 	/* Save "last mounted on" info for mount point (NULL pad)*/
255 	copyinstr(	path,				/* mount point*/
256 			mp->mnt_stat.f_mntonname,	/* save area*/
257 			MNAMELEN - 1,			/* max size*/
258 			&size);				/* real size*/
259 	bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
260 
261 	/* Save "mounted from" info for mount point (NULL pad)*/
262 	copyinstr(	args.fspec,			/* device name*/
263 			mp->mnt_stat.f_mntfromname,	/* save area*/
264 			MNAMELEN - 1,			/* max size*/
265 			&size);				/* real size*/
266 	bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
267 
268 	err = hpfs_mountfs(devvp, mp, &args, td);
269 	if (err)
270 		goto error_2;
271 
272 	/*
273 	 * Initialize FS stat information in mount struct; uses both
274 	 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
275 	 *
276 	 * This code is common to root and non-root mounts
277 	 */
278 	(void)VFS_STATFS(mp, &mp->mnt_stat, td);
279 
280 	goto success;
281 
282 
283 error_2:	/* error with devvp held*/
284 
285 	/* release devvp before failing*/
286 	vrele(devvp);
287 
288 error_1:	/* no state to back out*/
289 
290 success:
291 	return( err);
292 }
293 
294 /*
295  * Common code for mount and mountroot
296  */
297 int
298 hpfs_mountfs(struct vnode *devvp, struct mount *mp, struct hpfs_args *argsp,
299 	     struct thread *td)
300 {
301 	int error, ncount, ronly;
302 	struct sublock *sup;
303 	struct spblock *spp;
304 	struct hpfsmount *hpmp;
305 	struct buf *bp = NULL;
306 	struct vnode *vp;
307 	dev_t dev;
308 
309 	dprintf(("hpfs_mountfs():\n"));
310 	/*
311 	 * Disallow multiple mounts of the same device.
312 	 * Disallow mounting of a device that is currently in use
313 	 * (except for root, which might share swap device for miniroot).
314 	 * Flush out any old buffers remaining from a previous use.
315 	 */
316 	error = vfs_mountedon(devvp);
317 	if (error)
318 		return (error);
319 	ncount = count_udev(devvp->v_udev);
320 #if defined(__DragonFly__)
321 	if (devvp->v_object)
322 		ncount -= 1;
323 #endif
324 	if (ncount > 0 && devvp != rootvp)
325 		return (EBUSY);
326 
327 #if defined(__DragonFly__)
328 	VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY, td);
329 	error = vinvalbuf(devvp, V_SAVE, td, 0, 0);
330 	VOP__UNLOCK(devvp, 0, td);
331 #else
332 	error = vinvalbuf(devvp, V_SAVE, td, 0, 0);
333 #endif
334 	if (error)
335 		return (error);
336 
337 	ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
338 	VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY, td);
339 	error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td);
340 	VOP__UNLOCK(devvp, 0, td);
341 	if (error)
342 		return (error);
343 	dev = devvp->v_rdev;
344 
345 	/*
346 	 * Do actual mount
347 	 */
348 	hpmp = malloc(sizeof(struct hpfsmount), M_HPFSMNT, M_WAITOK);
349 	bzero(hpmp, sizeof(struct hpfsmount));
350 
351 	/* Read in SuperBlock */
352 	error = bread(devvp, SUBLOCK, SUSIZE, &bp);
353 	if (error)
354 		goto failed;
355 	bcopy(bp->b_data, &hpmp->hpm_su, sizeof(struct sublock));
356 	brelse(bp); bp = NULL;
357 
358 	/* Read in SpareBlock */
359 	error = bread(devvp, SPBLOCK, SPSIZE, &bp);
360 	if (error)
361 		goto failed;
362 	bcopy(bp->b_data, &hpmp->hpm_sp, sizeof(struct spblock));
363 	brelse(bp); bp = NULL;
364 
365 	sup = &hpmp->hpm_su;
366 	spp = &hpmp->hpm_sp;
367 
368 	/* Check magic */
369 	if (sup->su_magic != SU_MAGIC) {
370 		printf("hpfs_mountfs: SuperBlock MAGIC DOESN'T MATCH\n");
371 		error = EINVAL;
372 		goto failed;
373 	}
374 	if (spp->sp_magic != SP_MAGIC) {
375 		printf("hpfs_mountfs: SpareBlock MAGIC DOESN'T MATCH\n");
376 		error = EINVAL;
377 		goto failed;
378 	}
379 
380 	mp->mnt_data = (qaddr_t)hpmp;
381 	hpmp->hpm_devvp = devvp;
382 	hpmp->hpm_dev = dev;
383 	hpmp->hpm_mp = mp;
384 	hpmp->hpm_uid = argsp->uid;
385 	hpmp->hpm_gid = argsp->gid;
386 	hpmp->hpm_mode = argsp->mode;
387 
388 	error = hpfs_bminit(hpmp);
389 	if (error)
390 		goto failed;
391 
392 	error = hpfs_cpinit(hpmp, argsp);
393 	if (error) {
394 		hpfs_bmdeinit(hpmp);
395 		goto failed;
396 	}
397 	vfs_add_vnodeops(&mp->mnt_vn_ops, hpfs_vnodeop_entries);
398 
399 	error = hpfs_root(mp, &vp);
400 	if (error) {
401 		hpfs_cpdeinit(hpmp);
402 		hpfs_bmdeinit(hpmp);
403 		goto failed;
404 	}
405 
406 	vput(vp);
407 
408 #if defined(__DragonFly__)
409 	mp->mnt_stat.f_fsid.val[0] = (long)dev2udev(dev);
410 	mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
411 #else
412 	mp->mnt_stat.f_fsid.val[0] = (long)dev;
413 	mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_HPFS);
414 #endif
415 	mp->mnt_maxsymlinklen = 0;
416 	mp->mnt_flag |= MNT_LOCAL;
417 	dev->si_mountpoint = mp;
418 	return (0);
419 
420 failed:
421 	if (bp)
422 		brelse (bp);
423 	mp->mnt_data = (qaddr_t)NULL;
424 #if defined(__DragonFly__)
425 	dev->si_mountpoint = NULL;
426 #else
427 	devvp->v_specflags &= ~SI_MOUNTEDON;
428 #endif
429 	(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, td);
430 	return (error);
431 }
432 
433 #if !defined(__DragonFly__)
434 static int
435 hpfs_start(struct mount *mp, int flags, struct thread *td)
436 {
437 	return (0);
438 }
439 #endif
440 
441 static int
442 hpfs_unmount(struct mount *mp, int mntflags, struct thread *td)
443 {
444 	int error, flags, ronly;
445 	struct hpfsmount *hpmp = VFSTOHPFS(mp);
446 
447 	dprintf(("hpfs_unmount():\n"));
448 
449 	ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
450 
451 	flags = 0;
452 	if(mntflags & MNT_FORCE)
453 		flags |= FORCECLOSE;
454 
455 	dprintf(("hpfs_unmount: vflushing...\n"));
456 
457 	error = vflush(mp, 0, flags);
458 	if (error) {
459 		printf("hpfs_unmount: vflush failed: %d\n",error);
460 		return (error);
461 	}
462 
463 #if defined(__DragonFly__)
464 	hpmp->hpm_devvp->v_rdev->si_mountpoint = NULL;
465 #else
466 	hpmp->hpm_devvp->v_specflags &= ~SI_MOUNTEDON;
467 #endif
468 
469 	vinvalbuf(hpmp->hpm_devvp, V_SAVE, td, 0, 0);
470 	error = VOP_CLOSE(hpmp->hpm_devvp, ronly ? FREAD : FREAD|FWRITE, td);
471 
472 	vrele(hpmp->hpm_devvp);
473 
474 	dprintf(("hpfs_umount: freeing memory...\n"));
475 	hpfs_cpdeinit(hpmp);
476 	hpfs_bmdeinit(hpmp);
477 	mp->mnt_data = (qaddr_t)0;
478 	mp->mnt_flag &= ~MNT_LOCAL;
479 	FREE(hpmp, M_HPFSMNT);
480 
481 	return (0);
482 }
483 
484 static int
485 hpfs_root(struct mount *mp, struct vnode **vpp)
486 {
487 	int error = 0;
488 	struct hpfsmount *hpmp = VFSTOHPFS(mp);
489 
490 	dprintf(("hpfs_root():\n"));
491 	error = VFS_VGET(mp, (ino_t)hpmp->hpm_su.su_rootfno, vpp);
492 	if(error) {
493 		printf("hpfs_root: VFS_VGET failed: %d\n",error);
494 		return (error);
495 	}
496 
497 	return (error);
498 }
499 
500 static int
501 hpfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
502 {
503 	struct hpfsmount *hpmp = VFSTOHPFS(mp);
504 
505 	dprintf(("hpfs_statfs(): HPFS%d.%d\n",
506 		hpmp->hpm_su.su_hpfsver, hpmp->hpm_su.su_fnctver));
507 
508 #if defined(__DragonFly__)
509 	sbp->f_type = mp->mnt_vfc->vfc_typenum;
510 #else /* defined(__NetBSD__) */
511 	sbp->f_type = 0;
512 #endif
513 	sbp->f_bsize = DEV_BSIZE;
514 	sbp->f_iosize = DEV_BSIZE;
515 	sbp->f_blocks = hpmp->hpm_su.su_btotal;
516 	sbp->f_bfree = sbp->f_bavail = hpmp->hpm_bavail;
517 	sbp->f_ffree = 0;
518 	sbp->f_files = 0;
519 	if (sbp != &mp->mnt_stat) {
520 		bcopy((caddr_t)mp->mnt_stat.f_mntonname,
521 			(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
522 		bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
523 			(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
524 	}
525 	sbp->f_flags = mp->mnt_flag;
526 
527 	return (0);
528 }
529 
530 #if !defined(__DragonFly__)
531 static int
532 hpfs_sync(struct mount *mp, int waitfor, struct ucred *cred,
533 	  struct thread *td)
534 {
535 	return (0);
536 }
537 
538 static int
539 hpfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
540 	      struct thread *td)
541 {
542 	printf("hpfs_quotactl():\n");
543 	return (EOPNOTSUPP);
544 }
545 #endif
546 
547 /*ARGSUSED*/
548 static int
549 hpfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
550 {
551 	struct vnode *nvp;
552 	struct hpfid *hpfhp = (struct hpfid *)fhp;
553 	int error;
554 
555 	if ((error = VFS_VGET(mp, hpfhp->hpfid_ino, &nvp)) != 0) {
556 		*vpp = NULLVP;
557 		return (error);
558 	}
559 	/* XXX as unlink/rmdir/mkdir/creat are not currently possible
560 	 * with HPFS, we don't need to check anything else for now */
561 	*vpp = nvp;
562 
563 	return (0);
564 }
565 
566 static int
567 hpfs_vptofh(struct vnode *vp, struct fid *fhp)
568 {
569 	struct hpfsnode *hpp;
570 	struct hpfid *hpfhp;
571 
572 	hpp = VTOHP(vp);
573 	hpfhp = (struct hpfid *)fhp;
574 	hpfhp->hpfid_len = sizeof(struct hpfid);
575 	hpfhp->hpfid_ino = hpp->h_no;
576 	/* hpfhp->hpfid_gen = hpp->h_gen; */
577 	return (0);
578 }
579 
580 static int
581 hpfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
582 {
583 	struct hpfsmount *hpmp = VFSTOHPFS(mp);
584 	struct vnode *vp;
585 	struct hpfsnode *hp;
586 	struct buf *bp;
587 	struct thread *td = curthread;	/* XXX */
588 	int error;
589 
590 	dprintf(("hpfs_vget(0x%x): ",ino));
591 
592 	*vpp = NULL;
593 	hp = NULL;
594 	vp = NULL;
595 
596 	if ((*vpp = hpfs_hphashvget(hpmp->hpm_dev, ino, td)) != NULL) {
597 		dprintf(("hashed\n"));
598 		return (0);
599 	}
600 
601 	/*
602 	 * We have to lock node creation for a while,
603 	 * but then we have to call getnewvnode(),
604 	 * this may cause hpfs_reclaim() to be called,
605 	 * this may need to VOP_VGET() parent dir for
606 	 * update reasons, and if parent is not in
607 	 * hash, we have to lock node creation...
608 	 * To solve this, we MALLOC, getnewvnode and init while
609 	 * not locked (probability of node appearence
610 	 * at that time is little, and anyway - we'll
611 	 * check for it).
612 	 */
613 	MALLOC(hp, struct hpfsnode *, sizeof(struct hpfsnode),
614 		M_HPFSNO, M_WAITOK);
615 
616 	error = getnewvnode(VT_HPFS, hpmp->hpm_mp, hpmp->hpm_mp->mnt_vn_ops,
617 			    &vp, VLKTIMEOUT, 0);
618 	if (error) {
619 		printf("hpfs_vget: can't get new vnode\n");
620 		FREE(hp, M_HPFSNO);
621 		return (error);
622 	}
623 
624 	dprintf(("prenew "));
625 
626 	vp->v_data = hp;
627 
628 	if (ino == (ino_t)hpmp->hpm_su.su_rootfno)
629 		vp->v_flag |= VROOT;
630 
631 	lwkt_token_init(&hp->h_interlock);
632 
633 	hp->h_flag = H_INVAL;
634 	hp->h_vp = vp;
635 	hp->h_hpmp = hpmp;
636 	hp->h_no = ino;
637 	hp->h_dev = hpmp->hpm_dev;
638 	hp->h_uid = hpmp->hpm_uid;
639 	hp->h_gid = hpmp->hpm_uid;
640 	hp->h_mode = hpmp->hpm_mode;
641 	hp->h_devvp = hpmp->hpm_devvp;
642 	vref(hp->h_devvp);
643 
644 	error = VN_LOCK(vp, LK_EXCLUSIVE, td);
645 	if (error) {
646 		vput(vp);
647 		return (error);
648 	}
649 
650 	do {
651 		if ((*vpp = hpfs_hphashvget(hpmp->hpm_dev, ino, td)) != NULL) {
652 			dprintf(("hashed2\n"));
653 			vput(vp);
654 			return (0);
655 		}
656 	} while(LOCKMGR(&hpfs_hphash_lock,LK_EXCLUSIVE|LK_SLEEPFAIL,NULL,NULL));
657 
658 	hpfs_hphashins(hp);
659 
660 	LOCKMGR(&hpfs_hphash_lock, LK_RELEASE, NULL, NULL);
661 
662 	error = bread(hpmp->hpm_devvp, ino, FNODESIZE, &bp);
663 	if (error) {
664 		printf("hpfs_vget: can't read ino %d\n",ino);
665 		vput(vp);
666 		return (error);
667 	}
668 	bcopy(bp->b_data, &hp->h_fn, sizeof(struct fnode));
669 	brelse(bp);
670 
671 	if (hp->h_fn.fn_magic != FN_MAGIC) {
672 		printf("hpfs_vget: MAGIC DOESN'T MATCH\n");
673 		vput(vp);
674 		return (EINVAL);
675 	}
676 
677 	vp->v_type = hp->h_fn.fn_flag ? VDIR:VREG;
678 	hp->h_flag &= ~H_INVAL;
679 
680 	*vpp = vp;
681 
682 	return (0);
683 }
684 
685 #if defined(__DragonFly__)
686 static struct vfsops hpfs_vfsops = {
687 	hpfs_mount,
688 	vfs_stdstart,
689 	hpfs_unmount,
690 	hpfs_root,
691 	vfs_stdquotactl,
692 	hpfs_statfs,
693 	vfs_stdsync,
694 	hpfs_vget,
695 	hpfs_fhtovp,
696 	hpfs_checkexp,
697 	hpfs_vptofh,
698 	hpfs_init,
699 	hpfs_hphash_uninit,
700 	vfs_stdextattrctl,
701 };
702 VFS_SET(hpfs_vfsops, hpfs, 0);
703 #else /* defined(__NetBSD__) */
704 extern struct vnodeopv_desc hpfs_vnodeop_opv_desc;
705 
706 struct vnodeopv_desc *hpfs_vnodeopv_descs[] = {
707 	&hpfs_vnodeop_opv_desc,
708 	NULL,
709 };
710 
711 struct vfsops hpfs_vfsops = {
712 	MOUNT_HPFS,
713 	hpfs_mount,
714 	hpfs_start,
715 	hpfs_unmount,
716 	hpfs_root,
717 	hpfs_quotactl,
718 	hpfs_statfs,
719 	hpfs_sync,
720 	hpfs_vget,
721 	hpfs_fhtovp,
722 	hpfs_vptofh,
723 	hpfs_init,
724 	hpfs_sysctl,
725 	hpfs_mountroot,
726 	hpfs_checkexp,
727 	hpfs_vnodeopv_descs,
728 };
729 #endif
730