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 1.43 2008/09/17 21:44:22 dillon 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>
43 #include <machine/inttypes.h>
46 #include <vm/vm_param.h>
47 #if defined(__NetBSD__)
48 #include <vm/vm_prot.h>
50 #include <vm/vm_page.h>
51 #include <vm/vm_object.h>
52 #include <vm/vm_extern.h>
56 #if defined(__NetBSD__)
57 #include <miscfs/specfs/specdev.h>
61 #include "hpfsmount.h"
62 #include "hpfs_subr.h"
64 extern struct vop_ops hpfs_vnode_vops;
66 MALLOC_DEFINE(M_HPFSMNT, "HPFS mount", "HPFS mount structure");
67 MALLOC_DEFINE(M_HPFSNO, "HPFS node", "HPFS node structure");
69 static int hpfs_root (struct mount *, struct vnode **);
70 static int hpfs_statfs (struct mount *, struct statfs *, struct ucred *);
71 static int hpfs_unmount (struct mount *, int);
72 static int hpfs_vget (struct mount *mp, struct vnode *,
73 ino_t ino, struct vnode **vpp);
74 static int hpfs_mountfs (struct vnode *, struct mount *,
76 static int hpfs_vptofh (struct vnode *, struct fid *);
77 static int hpfs_fhtovp (struct mount *, struct vnode *,
78 struct fid *, struct vnode **);
82 static int hpfs_mount (struct mount *, char *, caddr_t, struct ucred *);
83 static int hpfs_init (struct vfsconf *);
84 static int hpfs_checkexp (struct mount *, struct sockaddr *,
85 int *, struct ucred **);
89 hpfs_checkexp(struct mount *mp,
91 int *exflagsp, struct ucred **credanonp)
94 struct hpfsmount *hpm = VFSTOHPFS(mp);
97 * Get the export permission structure for this <mp, client> tuple.
99 np = vfs_export_lookup(mp, &hpm->hpm_export, nam);
103 *exflagsp = np->netc_exflags;
104 *credanonp = &np->netc_anon;
109 hpfs_init(struct vfsconf *vcp)
111 dprintf(("hpfs_init():\n"));
118 hpfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
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 kprintf("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_nch, 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);
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, cred);
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)
224 int error, ncount, ronly;
227 struct hpfsmount *hpmp;
228 struct buf *bp = NULL;
232 dprintf(("hpfs_mountfs():\n"));
234 * Disallow multiple mounts of the same device.
235 * Disallow mounting of a device that is currently in use
236 * (except for root, which might share swap device for miniroot).
237 * Flush out any old buffers remaining from a previous use.
239 error = vfs_mountedon(devvp);
242 ncount = vcount(devvp);
248 VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY);
249 error = vinvalbuf(devvp, V_SAVE, 0, 0);
250 VOP__UNLOCK(devvp, 0);
254 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
255 VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY);
256 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL);
257 VOP__UNLOCK(devvp, 0);
265 hpmp = kmalloc(sizeof(struct hpfsmount), M_HPFSMNT, M_WAITOK | M_ZERO);
267 /* Read in SuperBlock */
268 error = bread(devvp, dbtodoff(SUBLOCK), SUSIZE, &bp);
271 bcopy(bp->b_data, &hpmp->hpm_su, sizeof(struct sublock));
272 brelse(bp); bp = NULL;
274 /* Read in SpareBlock */
275 error = bread(devvp, dbtodoff(SPBLOCK), SPSIZE, &bp);
278 bcopy(bp->b_data, &hpmp->hpm_sp, sizeof(struct spblock));
279 brelse(bp); bp = NULL;
285 if (sup->su_magic != SU_MAGIC) {
286 kprintf("hpfs_mountfs: SuperBlock MAGIC DOESN'T MATCH\n");
290 if (spp->sp_magic != SP_MAGIC) {
291 kprintf("hpfs_mountfs: SpareBlock MAGIC DOESN'T MATCH\n");
296 mp->mnt_data = (qaddr_t)hpmp;
297 hpmp->hpm_devvp = devvp;
300 hpmp->hpm_uid = argsp->uid;
301 hpmp->hpm_gid = argsp->gid;
302 hpmp->hpm_mode = argsp->mode;
304 error = hpfs_bminit(hpmp);
308 error = hpfs_cpinit(hpmp, argsp);
313 vfs_add_vnodeops(mp, &hpfs_vnode_vops, &mp->mnt_vn_norm_ops);
315 error = hpfs_root(mp, &vp);
324 mp->mnt_stat.f_fsid.val[0] = (long)dev2udev(dev);
325 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
326 mp->mnt_maxsymlinklen = 0;
327 mp->mnt_flag |= MNT_LOCAL;
328 dev->si_mountpoint = mp;
334 mp->mnt_data = (qaddr_t)NULL;
335 dev->si_mountpoint = NULL;
336 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE);
342 hpfs_unmount(struct mount *mp, int mntflags)
344 int error, flags, ronly;
345 struct hpfsmount *hpmp = VFSTOHPFS(mp);
347 dprintf(("hpfs_unmount():\n"));
349 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
352 if(mntflags & MNT_FORCE)
355 dprintf(("hpfs_unmount: vflushing...\n"));
357 error = vflush(mp, 0, flags);
359 kprintf("hpfs_unmount: vflush failed: %d\n",error);
363 hpmp->hpm_devvp->v_rdev->si_mountpoint = NULL;
365 vinvalbuf(hpmp->hpm_devvp, V_SAVE, 0, 0);
366 error = VOP_CLOSE(hpmp->hpm_devvp, ronly ? FREAD : FREAD|FWRITE);
368 vrele(hpmp->hpm_devvp);
370 dprintf(("hpfs_umount: freeing memory...\n"));
373 mp->mnt_data = (qaddr_t)0;
374 mp->mnt_flag &= ~MNT_LOCAL;
375 FREE(hpmp, M_HPFSMNT);
381 hpfs_root(struct mount *mp, struct vnode **vpp)
384 struct hpfsmount *hpmp = VFSTOHPFS(mp);
386 dprintf(("hpfs_root():\n"));
387 error = VFS_VGET(mp, NULL, (ino_t)hpmp->hpm_su.su_rootfno, vpp);
389 kprintf("hpfs_root: VFS_VGET failed: %d\n",error);
397 hpfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
399 struct hpfsmount *hpmp = VFSTOHPFS(mp);
401 dprintf(("hpfs_statfs(): HPFS%d.%d\n",
402 hpmp->hpm_su.su_hpfsver, hpmp->hpm_su.su_fnctver));
404 sbp->f_type = mp->mnt_vfc->vfc_typenum;
405 sbp->f_bsize = DEV_BSIZE;
406 sbp->f_iosize = DEV_BSIZE;
407 sbp->f_blocks = hpmp->hpm_su.su_btotal;
408 sbp->f_bfree = sbp->f_bavail = hpmp->hpm_bavail;
411 if (sbp != &mp->mnt_stat) {
412 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
413 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
415 sbp->f_flags = mp->mnt_flag;
423 hpfs_fhtovp(struct mount *mp, struct vnode *rootvp,
424 struct fid *fhp, struct vnode **vpp)
427 struct hpfid *hpfhp = (struct hpfid *)fhp;
430 if ((error = VFS_VGET(mp, NULL, hpfhp->hpfid_ino, &nvp)) != 0) {
434 /* XXX as unlink/rmdir/mkdir/creat are not currently possible
435 * with HPFS, we don't need to check anything else for now */
442 hpfs_vptofh(struct vnode *vp, struct fid *fhp)
444 struct hpfsnode *hpp;
448 hpfhp = (struct hpfid *)fhp;
449 hpfhp->hpfid_len = sizeof(struct hpfid);
450 hpfhp->hpfid_ino = hpp->h_no;
451 /* hpfhp->hpfid_gen = hpp->h_gen; */
456 hpfs_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp)
458 struct hpfsmount *hpmp = VFSTOHPFS(mp);
464 dprintf(("hpfs_vget(0x%x): ",ino));
470 if ((*vpp = hpfs_hphashvget(hpmp->hpm_dev, ino)) != NULL) {
471 dprintf(("hashed\n"));
476 * We have to lock node creation for a while,
477 * but then we have to call getnewvnode(),
478 * this may cause hpfs_reclaim() to be called,
479 * this may need to VOP_VGET() parent dir for
480 * update reasons, and if parent is not in
481 * hash, we have to lock node creation...
482 * To solve this, we MALLOC, getnewvnode and init while
483 * not locked (probability of node appearence
484 * at that time is little, and anyway - we'll
487 MALLOC(hp, struct hpfsnode *, sizeof(struct hpfsnode),
490 error = getnewvnode(VT_HPFS, hpmp->hpm_mp, &vp, VLKTIMEOUT, 0);
492 kprintf("hpfs_vget: can't get new vnode\n");
497 dprintf(("prenew "));
501 if (ino == (ino_t)hpmp->hpm_su.su_rootfno)
502 vsetflags(vp, VROOT);
504 lwkt_token_init(&hp->h_interlock, "hpfsilock");
506 hp->h_flag = H_INVAL;
510 hp->h_dev = hpmp->hpm_dev;
511 hp->h_uid = hpmp->hpm_uid;
512 hp->h_gid = hpmp->hpm_uid;
513 hp->h_mode = hpmp->hpm_mode;
514 hp->h_devvp = hpmp->hpm_devvp;
518 if ((*vpp = hpfs_hphashvget(hpmp->hpm_dev, ino)) != NULL) {
519 dprintf(("hashed2\n"));
523 } while (LOCKMGR(&hpfs_hphash_lock, LK_EXCLUSIVE | LK_SLEEPFAIL));
527 LOCKMGR(&hpfs_hphash_lock, LK_RELEASE);
529 error = bread(hpmp->hpm_devvp, dbtodoff(ino), FNODESIZE, &bp);
531 kprintf("hpfs_vget: can't read ino %"PRId64"\n",ino);
535 bcopy(bp->b_data, &hp->h_fn, sizeof(struct fnode));
538 if (hp->h_fn.fn_magic != FN_MAGIC) {
539 kprintf("hpfs_vget: MAGIC DOESN'T MATCH\n");
544 vp->v_type = hp->h_fn.fn_flag ? VDIR:VREG;
545 hp->h_flag &= ~H_INVAL;
547 /* Return the locked and refd vnode */
553 static struct vfsops hpfs_vfsops = {
554 .vfs_mount = hpfs_mount,
555 .vfs_unmount = hpfs_unmount,
556 .vfs_root = hpfs_root,
557 .vfs_statfs = hpfs_statfs,
558 .vfs_sync = vfs_stdsync,
559 .vfs_vget = hpfs_vget,
560 .vfs_fhtovp = hpfs_fhtovp,
561 .vfs_checkexp = hpfs_checkexp,
562 .vfs_vptofh = hpfs_vptofh,
563 .vfs_init = hpfs_init,
564 .vfs_uninit = hpfs_hphash_uninit
567 VFS_SET(hpfs_vfsops, hpfs, 0);
568 MODULE_VERSION(hpfs, 1);