2 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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 1.28 2005/07/26 15:43:35 hmp Exp $
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/nlookup.h>
36 #include <sys/kernel.h>
37 #include <sys/vnode.h>
38 #include <sys/mount.h>
40 #include <sys/fcntl.h>
41 #include <sys/malloc.h>
44 #include <vm/vm_param.h>
45 #if defined(__NetBSD__)
46 #include <vm/vm_prot.h>
48 #include <vm/vm_page.h>
49 #include <vm/vm_object.h>
50 #include <vm/vm_extern.h>
53 #if defined(__NetBSD__)
54 #include <miscfs/specfs/specdev.h>
58 #include "hpfsmount.h"
59 #include "hpfs_subr.h"
61 extern struct vnodeopv_entry_desc hpfs_vnodeop_entries[];
63 MALLOC_DEFINE(M_HPFSMNT, "HPFS mount", "HPFS mount structure");
64 MALLOC_DEFINE(M_HPFSNO, "HPFS node", "HPFS node structure");
66 static int hpfs_root (struct mount *, struct vnode **);
67 static int hpfs_statfs (struct mount *, struct statfs *,
69 static int hpfs_unmount (struct mount *, int, struct thread *);
70 static int hpfs_vget (struct mount *mp, ino_t ino,
72 static int hpfs_mountfs (struct vnode *, struct mount *,
73 struct hpfs_args *, struct thread *);
74 static int hpfs_vptofh (struct vnode *, struct fid *);
75 static int hpfs_fhtovp (struct mount *, struct fid *,
80 static int hpfs_mount (struct mount *, char *, caddr_t, struct thread *);
81 static int hpfs_init (struct vfsconf *);
82 static int hpfs_checkexp (struct mount *, struct sockaddr *,
83 int *, struct ucred **);
87 hpfs_checkexp(struct mount *mp,
89 int *exflagsp, struct ucred **credanonp)
92 struct hpfsmount *hpm = VFSTOHPFS(mp);
95 * Get the export permission structure for this <mp, client> tuple.
97 np = vfs_export_lookup(mp, &hpm->hpm_export, nam);
101 *exflagsp = np->netc_exflags;
102 *credanonp = &np->netc_anon;
107 hpfs_init(struct vfsconf *vcp)
109 dprintf(("hpfs_init():\n"));
116 hpfs_mount(struct mount *mp,
117 char *path, caddr_t data,
123 struct hpfs_args args;
124 struct hpfsmount *hpmp = 0;
125 struct nlookupdata nd;
127 dprintf(("hpfs_mount():\n"));
130 * Mounting non-root file system or updating a file system
134 /* copy in user arguments*/
135 error = copyin(data, (caddr_t)&args, sizeof (struct hpfs_args));
137 goto error_1; /* can't get arguments*/
140 * If updating, check whether changing from read-only to
141 * read/write; if there is no device name, that's all we do.
143 if (mp->mnt_flag & MNT_UPDATE) {
144 dprintf(("hpfs_mount: MNT_UPDATE: "));
146 hpmp = VFSTOHPFS(mp);
148 if (args.fspec == 0) {
149 dprintf(("export 0x%x\n",args.export.ex_flags));
150 error = vfs_export(mp, &hpmp->hpm_export, &args.export);
152 printf("hpfs_mount: vfs_export failed %d\n",
157 dprintf(("name [FAILED]\n"));
165 * Not an update, or updating the name: look up the name
166 * and verify that it refers to a sensible block device.
169 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
171 error = nlookup(&nd);
173 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp);
178 if (!vn_isdisk(devvp, &error))
187 /* Save "mounted from" info for mount point (NULL pad)*/
188 copyinstr( args.fspec, /* device name*/
189 mp->mnt_stat.f_mntfromname, /* save area*/
190 MNAMELEN - 1, /* max size*/
191 &size); /* real size*/
192 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
194 error = hpfs_mountfs(devvp, mp, &args, td);
199 * Initialize FS stat information in mount struct; uses
200 * mp->mnt_stat.f_mntfromname.
202 * This code is common to root and non-root mounts
204 VFS_STATFS(mp, &mp->mnt_stat, td);
207 error_2: /* error with devvp held*/
209 /* release devvp before failing*/
212 error_1: /* no state to back out*/
219 * Common code for mount and mountroot
222 hpfs_mountfs(struct vnode *devvp, struct mount *mp, struct hpfs_args *argsp,
225 int error, ncount, ronly;
228 struct hpfsmount *hpmp;
229 struct buf *bp = NULL;
233 dprintf(("hpfs_mountfs():\n"));
235 * Disallow multiple mounts of the same device.
236 * Disallow mounting of a device that is currently in use
237 * (except for root, which might share swap device for miniroot).
238 * Flush out any old buffers remaining from a previous use.
240 error = vfs_mountedon(devvp);
243 ncount = count_udev(devvp->v_udev);
249 VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY, td);
250 error = vinvalbuf(devvp, V_SAVE, td, 0, 0);
251 VOP__UNLOCK(devvp, 0, td);
255 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
256 VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY, td);
257 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL, td);
258 VOP__UNLOCK(devvp, 0, td);
266 hpmp = malloc(sizeof(struct hpfsmount), M_HPFSMNT, M_WAITOK);
267 bzero(hpmp, sizeof(struct hpfsmount));
269 /* Read in SuperBlock */
270 error = bread(devvp, SUBLOCK, SUSIZE, &bp);
273 bcopy(bp->b_data, &hpmp->hpm_su, sizeof(struct sublock));
274 brelse(bp); bp = NULL;
276 /* Read in SpareBlock */
277 error = bread(devvp, SPBLOCK, SPSIZE, &bp);
280 bcopy(bp->b_data, &hpmp->hpm_sp, sizeof(struct spblock));
281 brelse(bp); bp = NULL;
287 if (sup->su_magic != SU_MAGIC) {
288 printf("hpfs_mountfs: SuperBlock MAGIC DOESN'T MATCH\n");
292 if (spp->sp_magic != SP_MAGIC) {
293 printf("hpfs_mountfs: SpareBlock MAGIC DOESN'T MATCH\n");
298 mp->mnt_data = (qaddr_t)hpmp;
299 hpmp->hpm_devvp = devvp;
302 hpmp->hpm_uid = argsp->uid;
303 hpmp->hpm_gid = argsp->gid;
304 hpmp->hpm_mode = argsp->mode;
306 error = hpfs_bminit(hpmp);
310 error = hpfs_cpinit(hpmp, argsp);
315 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, hpfs_vnodeop_entries);
317 error = hpfs_root(mp, &vp);
326 mp->mnt_stat.f_fsid.val[0] = (long)dev2udev(dev);
327 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
328 mp->mnt_maxsymlinklen = 0;
329 mp->mnt_flag |= MNT_LOCAL;
330 dev->si_mountpoint = mp;
336 mp->mnt_data = (qaddr_t)NULL;
337 dev->si_mountpoint = NULL;
338 (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, td);
344 hpfs_unmount(struct mount *mp, int mntflags, struct thread *td)
346 int error, flags, ronly;
347 struct hpfsmount *hpmp = VFSTOHPFS(mp);
349 dprintf(("hpfs_unmount():\n"));
351 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
354 if(mntflags & MNT_FORCE)
357 dprintf(("hpfs_unmount: vflushing...\n"));
359 error = vflush(mp, 0, flags);
361 printf("hpfs_unmount: vflush failed: %d\n",error);
365 hpmp->hpm_devvp->v_rdev->si_mountpoint = NULL;
367 vinvalbuf(hpmp->hpm_devvp, V_SAVE, td, 0, 0);
368 error = VOP_CLOSE(hpmp->hpm_devvp, ronly ? FREAD : FREAD|FWRITE, td);
370 vrele(hpmp->hpm_devvp);
372 dprintf(("hpfs_umount: freeing memory...\n"));
375 mp->mnt_data = (qaddr_t)0;
376 mp->mnt_flag &= ~MNT_LOCAL;
377 FREE(hpmp, M_HPFSMNT);
383 hpfs_root(struct mount *mp, struct vnode **vpp)
386 struct hpfsmount *hpmp = VFSTOHPFS(mp);
388 dprintf(("hpfs_root():\n"));
389 error = VFS_VGET(mp, (ino_t)hpmp->hpm_su.su_rootfno, vpp);
391 printf("hpfs_root: VFS_VGET failed: %d\n",error);
399 hpfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
401 struct hpfsmount *hpmp = VFSTOHPFS(mp);
403 dprintf(("hpfs_statfs(): HPFS%d.%d\n",
404 hpmp->hpm_su.su_hpfsver, hpmp->hpm_su.su_fnctver));
406 sbp->f_type = mp->mnt_vfc->vfc_typenum;
407 sbp->f_bsize = DEV_BSIZE;
408 sbp->f_iosize = DEV_BSIZE;
409 sbp->f_blocks = hpmp->hpm_su.su_btotal;
410 sbp->f_bfree = sbp->f_bavail = hpmp->hpm_bavail;
413 if (sbp != &mp->mnt_stat) {
414 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
415 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
417 sbp->f_flags = mp->mnt_flag;
425 hpfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
428 struct hpfid *hpfhp = (struct hpfid *)fhp;
431 if ((error = VFS_VGET(mp, hpfhp->hpfid_ino, &nvp)) != 0) {
435 /* XXX as unlink/rmdir/mkdir/creat are not currently possible
436 * with HPFS, we don't need to check anything else for now */
443 hpfs_vptofh(struct vnode *vp, struct fid *fhp)
445 struct hpfsnode *hpp;
449 hpfhp = (struct hpfid *)fhp;
450 hpfhp->hpfid_len = sizeof(struct hpfid);
451 hpfhp->hpfid_ino = hpp->h_no;
452 /* hpfhp->hpfid_gen = hpp->h_gen; */
457 hpfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
459 struct hpfsmount *hpmp = VFSTOHPFS(mp);
463 struct thread *td = curthread; /* XXX */
466 dprintf(("hpfs_vget(0x%x): ",ino));
472 if ((*vpp = hpfs_hphashvget(hpmp->hpm_dev, ino, td)) != NULL) {
473 dprintf(("hashed\n"));
478 * We have to lock node creation for a while,
479 * but then we have to call getnewvnode(),
480 * this may cause hpfs_reclaim() to be called,
481 * this may need to VOP_VGET() parent dir for
482 * update reasons, and if parent is not in
483 * hash, we have to lock node creation...
484 * To solve this, we MALLOC, getnewvnode and init while
485 * not locked (probability of node appearence
486 * at that time is little, and anyway - we'll
489 MALLOC(hp, struct hpfsnode *, sizeof(struct hpfsnode),
492 error = getnewvnode(VT_HPFS, hpmp->hpm_mp, &vp, VLKTIMEOUT, 0);
494 printf("hpfs_vget: can't get new vnode\n");
499 dprintf(("prenew "));
503 if (ino == (ino_t)hpmp->hpm_su.su_rootfno)
506 lwkt_token_init(&hp->h_interlock);
508 hp->h_flag = H_INVAL;
512 hp->h_dev = hpmp->hpm_dev;
513 hp->h_uid = hpmp->hpm_uid;
514 hp->h_gid = hpmp->hpm_uid;
515 hp->h_mode = hpmp->hpm_mode;
516 hp->h_devvp = hpmp->hpm_devvp;
520 if ((*vpp = hpfs_hphashvget(hpmp->hpm_dev, ino, td)) != NULL) {
521 dprintf(("hashed2\n"));
525 } while(LOCKMGR(&hpfs_hphash_lock,LK_EXCLUSIVE|LK_SLEEPFAIL,NULL,NULL));
529 LOCKMGR(&hpfs_hphash_lock, LK_RELEASE, NULL, NULL);
531 error = bread(hpmp->hpm_devvp, ino, FNODESIZE, &bp);
533 printf("hpfs_vget: can't read ino %d\n",ino);
537 bcopy(bp->b_data, &hp->h_fn, sizeof(struct fnode));
540 if (hp->h_fn.fn_magic != FN_MAGIC) {
541 printf("hpfs_vget: MAGIC DOESN'T MATCH\n");
546 vp->v_type = hp->h_fn.fn_flag ? VDIR:VREG;
547 hp->h_flag &= ~H_INVAL;
549 /* Return the locked and refd vnode */
555 static struct vfsops hpfs_vfsops = {
556 .vfs_mount = hpfs_mount,
557 .vfs_unmount = hpfs_unmount,
558 .vfs_root = hpfs_root,
559 .vfs_statfs = hpfs_statfs,
560 .vfs_sync = vfs_stdsync,
561 .vfs_vget = hpfs_vget,
562 .vfs_fhtovp = hpfs_fhtovp,
563 .vfs_checkexp = hpfs_checkexp,
564 .vfs_vptofh = hpfs_vptofh,
565 .vfs_init = hpfs_init,
566 .vfs_uninit = hpfs_hphash_uninit
569 VFS_SET(hpfs_vfsops, hpfs, 0);