X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/71e4e98b7a314b1e09b7f602b2a20bccf03a62ad..b702c21db8cef3072e2845d46ab411775f9ec58c:/usr/src/sys/ufs/ffs/ffs_vfsops.c

diff --git a/usr/src/sys/ufs/ffs/ffs_vfsops.c b/usr/src/sys/ufs/ffs/ffs_vfsops.c
index 23d8546729..6ab1f3ada4 100644
--- a/usr/src/sys/ufs/ffs/ffs_vfsops.c
+++ b/usr/src/sys/ufs/ffs/ffs_vfsops.c
@@ -1,251 +1,752 @@
-/*	ffs_vfsops.c	4.1	83/05/27	*/
-
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-#include "../h/inode.h"
-#include "../h/proc.h"
-#include "../h/fs.h"
-#include "../h/buf.h"
-#include "../h/mount.h"
-#include "../h/file.h"
-#include "../h/nami.h"
-#include "../h/conf.h"
-
-smount()
+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * %sccs.include.redist.c%
+ *
+ *	@(#)ffs_vfsops.c	7.49 (Berkeley) %G%
+ */
+
+#include "param.h"
+#include "systm.h"
+#include "user.h"
+#include "proc.h"
+#include "kernel.h"
+#include "vnode.h"
+#include "specdev.h"
+#include "mount.h"
+#include "buf.h"
+#include "file.h"
+#include "disklabel.h"
+#include "ioctl.h"
+#include "errno.h"
+#include "malloc.h"
+#include "../ufs/quota.h"
+#include "../ufs/fs.h"
+#include "../ufs/ufsmount.h"
+#include "../ufs/inode.h"
+#include "ioctl.h"
+#include "disklabel.h"
+#include "stat.h"
+
+/*
+ * ufs vfs operations.
+ */
+int ufs_mount();
+int ufs_start();
+int ufs_unmount();
+int ufs_root();
+int ufs_quotactl();
+int ufs_statfs();
+int ufs_sync();
+int ufs_fhtovp();
+int ufs_vptofh();
+int ufs_init();
+
+struct vfsops ufs_vfsops = {
+	ufs_mount,
+	ufs_start,
+	ufs_unmount,
+	ufs_root,
+	ufs_quotactl,
+	ufs_statfs,
+	ufs_sync,
+	ufs_fhtovp,
+	ufs_vptofh,
+	ufs_init
+};
+
+/*
+ * Called by vfs_mountroot when ufs is going to be mounted as root.
+ *
+ * Name is updated by mount(8) after booting.
+ */
+#define ROOTNAME	"root_device"
+
+ufs_mountroot()
 {
-	register struct a {
-		char	*fspec;
-		char	*freg;
-		int	ronly;
-	} *uap;
-	dev_t dev;
-	register struct inode *ip;
+	register struct mount *mp;
+	extern struct vnode *rootvp;
+	struct ufsmount *ump;
 	register struct fs *fs;
-	register char *cp;
-
-	uap = (struct a *)u.u_ap;
-	u.u_error = getmdev(&dev);
-	if (u.u_error)
-		return;
-	u.u_dirp = (caddr_t)uap->freg;
-	ip = namei(uchar, LOOKUP, 1);
-	if (ip == NULL)
-		return;
-	if (ip->i_count!=1 || (ip->i_mode&IFMT) != IFDIR) {
-		iput(ip);
-		u.u_error = EBUSY;
-		return;
-	}
-	fs = mountfs(dev, uap->ronly, ip);
-	if (fs == 0)
-		return;
-	u.u_dirp = uap->freg;
-	for (cp = fs->fs_fsmnt; cp < &fs->fs_fsmnt[sizeof(fs->fs_fsmnt) - 2]; )
-		if ((*cp++ = uchar()) == 0)
-			u.u_dirp--;		/* get 0 again */
-	*cp = 0;
+	u_int size;
+	int error;
+
+	mp = (struct mount *)malloc((u_long)sizeof(struct mount),
+		M_MOUNT, M_WAITOK);
+	mp->mnt_op = &ufs_vfsops;
+	mp->mnt_flag = MNT_RDONLY;
+	mp->mnt_exroot = 0;
+	mp->mnt_mounth = NULLVP;
+	error = mountfs(rootvp, mp);
+	if (error) {
+		free((caddr_t)mp, M_MOUNT);
+		return (error);
+	}
+	if (error = vfs_lock(mp)) {
+		(void)ufs_unmount(mp, 0);
+		free((caddr_t)mp, M_MOUNT);
+		return (error);
+	}
+	rootfs = mp;
+	mp->mnt_next = mp;
+	mp->mnt_prev = mp;
+	mp->mnt_vnodecovered = NULLVP;
+	ump = VFSTOUFS(mp);
+	fs = ump->um_fs;
+	bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
+	fs->fs_fsmnt[0] = '/';
+	bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
+	    MNAMELEN);
+	(void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
+	    &size);
+	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
+	(void) ufs_statfs(mp, &mp->mnt_stat);
+	vfs_unlock(mp);
+	inittodr(fs->fs_time);
+	return (0);
+}
+
+/*
+ * VFS Operations.
+ *
+ * mount system call
+ */
+ufs_mount(mp, path, data, ndp)
+	register struct mount *mp;
+	char *path;
+	caddr_t data;
+	struct nameidata *ndp;
+{
+	struct vnode *devvp;
+	struct ufs_args args;
+	struct ufsmount *ump;
+	register struct fs *fs;
+	u_int size;
+	int error;
+
+	if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
+		return (error);
+	/*
+	 * Process export requests.
+	 */
+	if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) {
+		if (args.exflags & MNT_EXPORTED)
+			mp->mnt_flag |= MNT_EXPORTED;
+		else
+			mp->mnt_flag &= ~MNT_EXPORTED;
+		if (args.exflags & MNT_EXRDONLY)
+			mp->mnt_flag |= MNT_EXRDONLY;
+		else
+			mp->mnt_flag &= ~MNT_EXRDONLY;
+		mp->mnt_exroot = args.exroot;
+	}
+	if ((mp->mnt_flag & MNT_UPDATE) == 0) {
+		if ((error = getmdev(&devvp, args.fspec, ndp)) != 0)
+			return (error);
+		error = mountfs(devvp, mp);
+	} else {
+		ump = VFSTOUFS(mp);
+		fs = ump->um_fs;
+		if (fs->fs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0)
+			fs->fs_ronly = 0;
+		/*
+		 * Verify that the specified device is the one that
+		 * is really being used for the root file system.
+		 */
+		if (args.fspec == 0)
+			return (0);
+		if ((error = getmdev(&devvp, args.fspec, ndp)) != 0)
+			return (error);
+		if (devvp != ump->um_devvp)
+			error = EINVAL;	/* needs translation */
+		else
+			vrele(devvp);
+	}
+	if (error) {
+		vrele(devvp);
+		return (error);
+	}
+	ump = VFSTOUFS(mp);
+	fs = ump->um_fs;
+	(void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
+	bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
+	bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
+	    MNAMELEN);
+	(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 
+	    &size);
+	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
+	(void) ufs_statfs(mp, &mp->mnt_stat);
+	return (0);
 }
 
-/* this routine has lousy error codes */
-/* this routine has races if running twice */
-struct fs *
-mountfs(dev, ronly, ip)
-	dev_t dev;
-	int ronly;
-	struct inode *ip;
+/*
+ * Common code for mount and mountroot
+ */
+mountfs(devvp, mp)
+	register struct vnode *devvp;
+	struct mount *mp;
 {
-	register struct mount *mp = 0;
-	struct buf *tp = 0;
-	register struct buf *bp = 0;
+	register struct ufsmount *ump = (struct ufsmount *)0;
+	struct buf *bp = NULL;
 	register struct fs *fs;
-	int blks;
-	caddr_t space;
-	int i, size;
+	dev_t dev = devvp->v_rdev;
+	struct partinfo dpart;
+	int havepart = 0, blks;
+	caddr_t base, space;
+	int havepart = 0, blks;
+	int error, i, size;
+	int needclose = 0;
+	int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
 
-	u.u_error =
-	    (*bdevsw[major(dev)].d_open)(dev, ronly ? FREAD : FREAD|FWRITE);
-	if (u.u_error) {
-		u.u_error = EIO;
-		goto out;
+	if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED))
+		return (error);
+	needclose = 1;
+	if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED) != 0) {
+		size = DEV_BSIZE;
+	} else {
+		havepart = 1;
+		size = dpart.disklab->d_secsize;
 	}
-	tp = bread(dev, SBLOCK, SBSIZE);
-	if (tp->b_flags & B_ERROR)
+	if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp))
 		goto out;
-	for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
-		if (mp->m_bufp != 0 && dev == mp->m_dev) {
-			mp = 0;
-			goto out;
-		}
-	for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
-		if (mp->m_bufp == 0)
-			goto found;
-	mp = 0;
-	goto out;
-found:
-	mp->m_bufp = tp;	/* just to reserve this slot */
-	mp->m_dev = NODEV;
-	fs = tp->b_un.b_fs;
-	bp = geteblk((int)fs->fs_sbsize);
-	mp->m_bufp = bp;
-	bcopy((caddr_t)tp->b_un.b_addr, (caddr_t)bp->b_un.b_addr,
-	   (u_int)fs->fs_sbsize);
-	brelse(tp);
-	tp = 0;
 	fs = bp->b_un.b_fs;
-	if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE)
+		error = EINVAL;		/* XXX needs translation */
 		goto out;
-	fs->fs_ronly = (ronly != 0);
+	}
+	ump = (struct ufsmount *)malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
+	ump->um_fs = (struct fs *)malloc((u_long)fs->fs_sbsize, M_SUPERBLK,
+	    M_WAITOK);
+	bcopy((caddr_t)bp->b_un.b_addr, (caddr_t)ump->um_fs,
+	   (u_int)fs->fs_sbsize);
+	if (fs->fs_sbsize < SBSIZE)
+		bp->b_flags |= B_INVAL;
+	brelse(bp);
+	bp = NULL;
+	fs = ump->um_fs;
+	fs->fs_ronly = ronly;
 	if (ronly == 0)
 		fs->fs_fmod = 1;
+	if (havepart) {
+		dpart.part->p_fstype = FS_BSDFFS;
+		dpart.part->p_fsize = fs->fs_fsize;
+		dpart.part->p_frag = fs->fs_frag;
+		dpart.part->p_cpg = fs->fs_cpg;
+	}
+#ifdef SECSIZE
+	/*
+	 * If we have a disk label, force per-partition
+	 * filesystem information to be correct
+	 * and set correct current fsbtodb shift.
+	 */
+#endif SECSIZE
+	if (havepart) {
+		dpart.part->p_fstype = FS_BSDFFS;
+		dpart.part->p_fsize = fs->fs_fsize;
+		dpart.part->p_frag = fs->fs_frag;
+#ifdef SECSIZE
+#ifdef tahoe
+		/*
+		 * Save the original fsbtodb shift to restore on updates.
+		 * (Console doesn't understand fsbtodb changes.)
+		 */
+		fs->fs_sparecon[0] = fs->fs_fsbtodb;
+#endif
+		i = fs->fs_fsize / size;
+		for (fs->fs_fsbtodb = 0; i > 1; i >>= 1)
+			fs->fs_fsbtodb++;
+#endif SECSIZE
+		fs->fs_dbsize = size;
+	}
 	blks = howmany(fs->fs_cssize, fs->fs_fsize);
-	space = wmemall(vmemall, (int)fs->fs_cssize);
-	if (space == 0)
-		goto out;
+	base = space = (caddr_t)malloc((u_long)fs->fs_cssize, M_SUPERBLK,
+	    M_WAITOK);
 	for (i = 0; i < blks; i += fs->fs_frag) {
 		size = fs->fs_bsize;
 		if (i + fs->fs_frag > blks)
 			size = (blks - i) * fs->fs_fsize;
-		tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size);
-		if (tp->b_flags&B_ERROR) {
-			wmemfree(space, (int)fs->fs_cssize);
+#ifdef SECSIZE
+		tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size,
+		    fs->fs_dbsize);
+#else SECSIZE
+		error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
+			NOCRED, &bp);
+		if (error) {
+			free((caddr_t)base, M_SUPERBLK);
 			goto out;
 		}
-		bcopy((caddr_t)tp->b_un.b_addr, space, (u_int)size);
-		fs->fs_csp[i / fs->fs_frag] = (struct csum *)space;
+		bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size);
+		fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space;
 		space += size;
-		brelse(tp);
-		tp = 0;
-	}
-	mp->m_inodp = ip;
-	mp->m_dev = dev;
-	if (ip) {
-		ip->i_flag |= IMOUNT;
-		iunlock(ip);
+		brelse(bp);
+		bp = NULL;
 	}
-	return (fs);
+	mp->mnt_data = (qaddr_t)ump;
+	mp->mnt_stat.f_fsid.val[0] = (long)dev;
+	mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS;
+	mp->mnt_flag |= MNT_LOCAL;
+	ump->um_mountp = mp;
+	ump->um_dev = dev;
+	ump->um_devvp = devvp;
+	for (i = 0; i < MAXQUOTAS; i++)
+		ump->um_quotas[i] = NULLVP;
+	devvp->v_specflags |= SI_MOUNTEDON;
+
+	/* Sanity checks for old file systems.			   XXX */
+	fs->fs_npsect = MAX(fs->fs_npsect, fs->fs_nsect);	/* XXX */
+	fs->fs_interleave = MAX(fs->fs_interleave, 1);		/* XXX */
+	if (fs->fs_postblformat == FS_42POSTBLFMT)		/* XXX */
+		fs->fs_nrpos = 8;				/* XXX */
+
+	return (0);
 out:
-	u.u_error = EBUSY;
-	if (ip)
-		iput(ip);
-	if (mp)
-		mp->m_bufp = 0;
 	if (bp)
 		brelse(bp);
-	if (tp)
-		brelse(tp);
+	if (needclose)
+		(void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED);
+	if (ump) {
+		free((caddr_t)ump->um_fs, M_SUPERBLK);
+		free((caddr_t)ump, M_UFSMNT);
+		mp->mnt_data = (qaddr_t)0;
+	}
+	return (error);
+}
+
+/*
+ * Make a filesystem operational.
+ * Nothing to do at the moment.
+ */
+/* ARGSUSED */
+ufs_start(mp, flags)
+	struct mount *mp;
+	int flags;
+{
+
 	return (0);
 }
 
-umount()
+/*
+ * unmount system call
+ */
+ufs_unmount(mp, mntflags)
+	struct mount *mp;
+	int mntflags;
 {
-	struct a {
-		char	*fspec;
-	};
+	register struct ufsmount *ump;
+	register struct fs *fs;
+	int i, error, ronly, flags = 0;
 
-	u.u_error = unmount1(0);
+	if (mntflags & MNT_FORCE)
+		return (EINVAL);
+	if (mntflags & MNT_FORCE)
+		flags |= FORCECLOSE;
+	mntflushbuf(mp, 0);
+	if (mntinvalbuf(mp))
+		return (EBUSY);
+	ump = VFSTOUFS(mp);
+		return (error);
+#ifdef QUOTA
+	if (mp->mnt_flag & MNT_QUOTA) {
+		if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags))
+			return (error);
+		for (i = 0; i < MAXQUOTAS; i++) {
+			if (ump->um_quotas[i] == NULLVP)
+				continue;
+			quotaoff(mp, i);
+		}
+		/*
+		 * Here we fall through to vflush again to ensure
+		 * that we have gotten rid of all the system vnodes.
+		 */
+	}
+#endif
+	if (error = vflush(mp, NULLVP, flags))
+		return (error);
+	fs = ump->um_fs;
+	ronly = !fs->fs_ronly;
+	error = closei(dev, IFBLK, fs->fs_ronly? FREAD : FREAD|FWRITE);
+	irele(ip);
+	return (error);
 }
 
-unmount1(forcibly)
-	int forcibly;
+/*
+ * Return root of a filesystem
+ */
+ufs_root(mp, vpp)
+	struct mount *mp;
+	struct vnode **vpp;
 {
-	dev_t dev;
-	register struct mount *mp;
-	int stillopen, flag, error;
 	register struct inode *ip;
-	register struct fs *fs;
+	struct inode *nip;
+	struct vnode tvp;
+	int error;
 
-	error = getmdev(&dev);
+	tvp.v_mount = mp;
+	ip = VTOI(&tvp);
+	ip->i_vnode = &tvp;
+	ip->i_dev = VFSTOUFS(mp)->um_dev;
+	error = iget(ip, (ino_t)ROOTINO, &nip);
 	if (error)
 		return (error);
-	for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
-		if (mp->m_bufp != NULL && dev == mp->m_dev)
-			goto found;
-	return (EINVAL);
-found:
-	xumount(dev);	/* remove unused sticky files from text table */
-	update();
-#ifdef QUOTA
-	if ((stillopen = iflush(dev, mp->m_qinod)) < 0 && !forcibly)
+	*vpp = ITOV(nip);
+	return (0);
+}
+
+/*
+ * Do operations associated with quotas
+ */
+ufs_quotactl(mp, cmds, uid, arg)
+	struct mount *mp;
+	int cmds;
+	uid_t uid;
+	caddr_t arg;
+{
+	register struct nameidata *ndp = &u.u_nd;
+	struct ufsmount *ump = VFSTOUFS(mp);
+	struct proc *p = u.u_procp;	/* XXX */
+	int cmd, type, error;
+
+#ifndef QUOTA
+	return (EOPNOTSUPP);
 #else
-	if ((stillopen = iflush(dev)) < 0 && !forcibly)
-#endif
-		return (EBUSY);
-	if (stillopen < 0)
-		return (EBUSY);			/* XXX */
-#ifdef QUOTA
-	closedq(mp);
-	/*
-	 * Here we have to iflush again to get rid of the quota inode.
-	 * A drag, but it would be ugly to cheat, & this doesn't happen often
-	 */
-	(void)iflush(dev, (struct inode *)NULL);
+	if (uid == -1)
+		uid = p->p_ruid;
+	cmd = cmds >> SUBCMDSHIFT;
+
+	switch (cmd) {
+	case Q_GETQUOTA:
+	case Q_SYNC:
+		if (uid == p->p_ruid)
+			break;
+		/* fall through */
+	default:
+		if (error = suser(ndp->ni_cred, &u.u_acflag))
+			return (error);
+	}
+
+	type = cmd & SUBCMDMASK;
+	if ((u_int)type >= MAXQUOTAS)
+		return (EINVAL);
+
+	switch (cmd) {
+
+	case Q_QUOTAON:
+		return (quotaon(ndp, mp, type, arg));
+
+	case Q_QUOTAOFF:
+		if (vfs_busy(mp))
+			return (0);
+		error = quotaoff(mp, type);
+		vfs_unbusy(mp);
+		return (error);
+
+	case Q_SETQUOTA:
+		return (setquota(mp, uid, type, arg));
+
+	case Q_SETUSE:
+		return (setuse(mp, uid, type, arg));
+
+	case Q_GETQUOTA:
+		return (getquota(mp, uid, type, arg));
+
+	case Q_SYNC:
+		if (vfs_busy(mp))
+			return (0);
+		error = qsync(mp);
+		vfs_unbusy(mp);
+		return (error);
+
+	default:
+		return (EINVAL);
+	}
+	/* NOTREACHED */
 #endif
-	ip = mp->m_inodp;
-	ip->i_flag &= ~IMOUNT;
-	irele(ip);
-	fs = mp->m_bufp->b_un.b_fs;
-	wmemfree((caddr_t)fs->fs_csp[0], (int)fs->fs_cssize);
-	flag = !fs->fs_ronly;
-	brelse(mp->m_bufp);
-	mp->m_bufp = 0;
-	mp->m_dev = 0;
-	mpurge(mp - &mount[0]);
-	if (!stillopen) {
-		(*bdevsw[major(dev)].d_close)(dev, flag);
-		binval(dev);
+}
+
+/*
+ * Get file system statistics.
+ */
+ufs_statfs(mp, sbp)
+	struct mount *mp;
+	register struct statfs *sbp;
+{
+	register struct ufsmount *ump;
+	register struct fs *fs;
+
+	ump = VFSTOUFS(mp);
+	fs = ump->um_fs;
+	if (fs->fs_magic != FS_MAGIC)
+		panic("ufs_statfs");
+	sbp->f_type = MOUNT_UFS;
+	sbp->f_fsize = fs->fs_fsize;
+	sbp->f_bsize = fs->fs_bsize;
+	sbp->f_blocks = fs->fs_dsize;
+	sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
+		fs->fs_cstotal.cs_nffree;
+	sbp->f_bavail = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) -
+		(fs->fs_dsize - sbp->f_bfree);
+	sbp->f_files =  fs->fs_ncg * fs->fs_ipg - ROOTINO;
+	sbp->f_ffree = fs->fs_cstotal.cs_nifree;
+	if (sbp != &mp->mnt_stat) {
+		bcopy((caddr_t)mp->mnt_stat.f_mntonname,
+			(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
+		bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
+			(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
 	}
 	return (0);
 }
 
-sbupdate(mp)
+int	syncprt = 0;
+
+/*
+ * Go through the disk queues to initiate sandbagged IO;
+ * go through the inodes to write those that have been modified;
+ * initiate the writing of the super block if it has been modified.
+ *
+ * Note: we are always called with the filesystem marked `MPBUSY'.
+ */
+ufs_sync(mp, waitfor)
 	struct mount *mp;
+	int waitfor;
+{
+	register struct vnode *vp;
+	register struct inode *ip;
+	register struct ufsmount *ump = VFSTOUFS(mp);
+	register struct fs *fs;
+	int error, allerror = 0;
+
+	if (syncprt)
+		bufstats();
+	fs = ump->um_fs;
+	/*
+	 * Write back modified superblock.
+	 * Consistency check that the superblock
+	 * is still in the buffer cache.
+	 */
+	if (fs->fs_fmod != 0) {
+		if (fs->fs_ronly != 0) {		/* XXX */
+			printf("fs = %s\n", fs->fs_fsmnt);
+			panic("update: rofs mod");
+		}
+		fs->fs_fmod = 0;
+		fs->fs_time = time.tv_sec;
+		allerror = sbupdate(ump, waitfor);
+	}
+	/*
+	 * Write back each (modified) inode.
+	 */
+loop:
+	for (vp = mp->mnt_mounth; vp; vp = vp->v_mountf) {
+		/*
+		 * If the vnode that we are about to sync is no longer
+		 * associated with this mount point, start over.
+		 */
+		if (vp->v_mount != mp)
+			goto loop;
+		ip = VTOI(vp);
+		if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) == 0 &&
+		    vp->v_dirtyblkhd == NULL)
+			continue;
+		if (vget(vp))
+			goto loop;
+		if (vp->v_dirtyblkhd)
+			vflushbuf(vp, 0);
+		if ((ip->i_flag & (IMOD|IACC|IUPD|ICHG)) &&
+		    (error = iupdat(ip, &time, &time, 0)))
+			allerror = error;
+		vput(vp);
+	}
+	/*
+	 * Force stale file system control information to be flushed.
+	 */
+	vflushbuf(ump->um_devvp, waitfor == MNT_WAIT ? B_SYNC : 0);
+#ifdef QUOTA
+	qsync(mp);
+#endif
+	return (allerror);
+}
+
+/*
+ * Write a superblock and associated information back to disk.
+ */
+sbupdate(mp, waitfor)
+	struct ufsmount *mp;
+	int waitfor;
 {
-	register struct fs *fs = mp->m_bufp->b_un.b_fs;
+	register struct fs *fs = mp->um_fs;
 	register struct buf *bp;
 	int blks;
 	caddr_t space;
-	int i, size;
+	int i, size, error = 0;
 
-	bp = getblk(mp->m_dev, SBLOCK, (int)fs->fs_sbsize);
+#ifdef SECSIZE
+	bp = getblk(mp->m_dev, (daddr_t)fsbtodb(fs, SBOFF / fs->fs_fsize),
+	    (int)fs->fs_sbsize, fs->fs_dbsize);
+#else SECSIZE
+	bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize);
+#endif SECSIZE
 	bcopy((caddr_t)fs, bp->b_un.b_addr, (u_int)fs->fs_sbsize);
-	bwrite(bp);
+	/* Restore compatibility to old file systems.		   XXX */
+	if (fs->fs_postblformat == FS_42POSTBLFMT)		/* XXX */
+		bp->b_un.b_fs->fs_nrpos = -1;			/* XXX */
+#ifdef SECSIZE
+#ifdef tahoe
+	/* restore standard fsbtodb shift */
+	bp->b_un.b_fs->fs_fsbtodb = fs->fs_sparecon[0];
+	bp->b_un.b_fs->fs_sparecon[0] = 0;
+#endif
+#endif SECSIZE
+	if (waitfor == MNT_WAIT)
+		error = bwrite(bp);
+	else
+		bawrite(bp);
 	blks = howmany(fs->fs_cssize, fs->fs_fsize);
 	space = (caddr_t)fs->fs_csp[0];
 	for (i = 0; i < blks; i += fs->fs_frag) {
 		size = fs->fs_bsize;
 		if (i + fs->fs_frag > blks)
 			size = (blks - i) * fs->fs_fsize;
-		bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size);
+#ifdef SECSIZE
+		bp = getblk(mp->m_dev, fsbtodb(fs, fs->fs_csaddr + i), size,
+		    fs->fs_dbsize);
+#else SECSIZE
+		bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), size);
+#endif SECSIZE
 		bcopy(space, bp->b_un.b_addr, (u_int)size);
 		space += size;
-		bwrite(bp);
+		if (waitfor == MNT_WAIT)
+			error = bwrite(bp);
+		else
+			bawrite(bp);
 	}
+	return (error);
+}
+
+/*
+ * Print out statistics on the current allocation of the buffer pool.
+ * Can be enabled to print out on every ``sync'' by setting "syncprt"
+ * above.
+ */
+bufstats()
+{
+	int s, i, j, count;
+	register struct buf *bp, *dp;
+	int counts[MAXBSIZE/CLBYTES+1];
+	static char *bname[BQUEUES] = { "LOCKED", "LRU", "AGE", "EMPTY" };
+
+	for (bp = bfreelist, i = 0; bp < &bfreelist[BQUEUES]; bp++, i++) {
+		count = 0;
+		for (j = 0; j <= MAXBSIZE/CLBYTES; j++)
+			counts[j] = 0;
+		s = splbio();
+		for (dp = bp->av_forw; dp != bp; dp = dp->av_forw) {
+			counts[dp->b_bufsize/CLBYTES]++;
+			count++;
+		}
+		splx(s);
+		printf("%s: total-%d", bname[i], count);
+		for (j = 0; j <= MAXBSIZE/CLBYTES; j++)
+			if (counts[j] != 0)
+				printf(", %d-%d", j * CLBYTES, counts[j]);
+		printf("\n");
+	}
+}
+
+/*
+ * File handle to vnode
+ *
+ * Have to be really careful about stale file handles:
+ * - check that the inode number is in range
+ * - call iget() to get the locked inode
+ * - check for an unallocated inode (i_mode == 0)
+ * - check that the generation number matches
+ */
+ufs_fhtovp(mp, fhp, vpp)
+	register struct mount *mp;
+	struct fid *fhp;
+	struct vnode **vpp;
+{
+	register struct ufid *ufhp;
+	register struct fs *fs;
+	register struct inode *ip;
+	struct inode *nip;
+	struct vnode tvp;
+	int error;
+
+	ufhp = (struct ufid *)fhp;
+	fs = VFSTOUFS(mp)->um_fs;
+	if (ufhp->ufid_ino < ROOTINO ||
+	    ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) {
+		*vpp = NULLVP;
+		return (EINVAL);
+	}
+	tvp.v_mount = mp;
+	ip = VTOI(&tvp);
+	ip->i_vnode = &tvp;
+	ip->i_dev = VFSTOUFS(mp)->um_dev;
+	if (error = iget(ip, ufhp->ufid_ino, &nip)) {
+		*vpp = NULLVP;
+		return (error);
+	}
+	ip = nip;
+	if (ip->i_mode == 0) {
+		iput(ip);
+		*vpp = NULLVP;
+		return (EINVAL);
+	}
+	if (ip->i_gen != ufhp->ufid_gen) {
+		iput(ip);
+		*vpp = NULLVP;
+		return (EINVAL);
+	}
+	*vpp = ITOV(ip);
+	return (0);
+}
+
+/*
+ * Vnode pointer to File handle
+ */
+/* ARGSUSED */
+ufs_vptofh(vp, fhp)
+	struct vnode *vp;
+	struct fid *fhp;
+{
+	register struct inode *ip = VTOI(vp);
+	register struct ufid *ufhp;
+
+	ufhp = (struct ufid *)fhp;
+	ufhp->ufid_len = sizeof(struct ufid);
+	ufhp->ufid_ino = ip->i_number;
+	ufhp->ufid_gen = ip->i_gen;
+	return (0);
 }
 
 /*
- * Common code for mount and umount.
  * Check that the user's argument is a reasonable
  * thing on which to mount, and return the device number if so.
  */
-getmdev(pdev)
-	dev_t *pdev;
+getmdev(devvpp, fname, ndp)
+	struct vnode **devvpp;
+	caddr_t fname;
+	register struct nameidata *ndp;
 {
-	dev_t dev;
-	register struct inode *ip;
+	register struct vnode *vp;
+	int error;
 
-	if (!suser())
-		return (u.u_error);
-	ip = namei(uchar, LOOKUP, 1);
-	if (ip == NULL)
-		return (u.u_error);
-	if ((ip->i_mode&IFMT) != IFBLK)
+	ndp->ni_nameiop = LOOKUP | FOLLOW;
+	ndp->ni_segflg = UIO_USERSPACE;
+	ndp->ni_dirp = fname;
+	if (error = namei(ndp))
+		return (error);
+	vp = ndp->ni_vp;
+	if (vp->v_type != VBLK) {
+		vrele(vp);
 		return (ENOTBLK);
-	dev = (dev_t)ip->i_rdev;
-	if (major(dev) >= nblkdev)
+	}
+	if (major(vp->v_rdev) >= nblkdev) {
+		vrele(vp);
 		return (ENXIO);
-	iput(ip);
-	*pdev = dev;
+	}
+	*devvpp = vp;
 	return (0);
 }